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Taliang Teng - One of the best experts on this subject based on the ideXlab platform.
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performance of the taiwan rapid earthquake Information Release system rtd during the 1999 chi chi taiwan earthquake
Seismological Research Letters, 2000Co-Authors: William H K Lee, Chenchun Chen, Tzaychyn Shin, Taliang Teng, Yiben TsaiAbstract:A major earthquake occurred near the town of Chi-Chi in Nantou County, Taiwan, at 1:47 am (local time), 21 September 1999, about 150 km south of Taipei. This is the largest earthquake to have occurred on land in Taiwan during the 20th century. Although Taiwan has an earthquake building code, thousands of buildings collapsed due to the earthquake, leaving more than 100,000 people homeless. The death toll exceeded 2,300 with more than 10,000 injured. Within 102 seconds after the earthquake's origin time, a good estimate of the hypocenter (23.87° N, 120.75° E, Depth = 10 km) and magnitude ( ML = 7.3), and a shaking map were determined automatically by the RTD system. The result was immediately disseminated to governmental emergency response agencies electronically in four ways, by e-mail, World Wide Web, fax, and pager. This rapid Information system has been successfully operating in Taiwan for more than four years. During the Chi-Chi earthquake, the rapid availability of earthquake Information facilitated the emergency response. The RTD system worked very well throughout the whole aftershock sequence (several aftershocks had local magnitude of 6 or larger). Again this timely Information was useful to the emergency response teams. In this paper, we briefly describe the RTD system and summarize its performance during the Chi-Chi earthquake. The Taiwan Rapid Earthquake Information Release System (RTD) is based on a simple hardware/software design first introduced by Lee et al. (1989). This system was subsequently improved and refined (Lee, 1994; Lee et al., 1996; Shin et al., 1996; Wu et al., 1997, 1998, 1999). The RTD system consists of 61 telemetered strong-motion stations in Taiwan (Figure 1). Digital signals are continuously telemetered to the headquarters of the Central Weather Bureau (CWB) in Taipei via 4,800-baud leased telephone lines. Each telemetered signal contains …
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taiwan rapid earthquake Information Release system
Seismological Research Letters, 1997Co-Authors: Tzaychyn Shin, William H K Lee, Chenchun Chen, Yiben Tsai, Taliang TengAbstract:INTRODUCTION Interest in rapid access to earthquake Information has grown enormously in the past few years (Gee et al. , 1996; Teng et al. , 1997; Wu et al. , 1997). In addition to satisfying the public and media needs, rapid notification programs provide valuable Information for rapid earthquake disaster response, thereby mitigating the loss. Recognizing the importance of rapid earthquake Information for seismic hazard mitigation, efforts to design and implement systems to provide rapid earthquake Information have expanded over the last 10 years (Heaton, 1985; Nakamura and Tucker, 1988; Buland and Person, 1992; Romanowicz et al. , 1993; Bakun et al. , 1994; Espinosa Aranda et al. , 1995; Lee et al. , 1996; Shin et al. , 1996; Teng et al. , 1997; Wu et al. , 1997). In 1989, a telemetered, digital, short-period seismograph network of 75 three-component field stations was installed in Taiwan (see Figure 1) using Teledyne Geotech 1-Hz short-period sensors (Teledyne S13). The signals...
Yiben Tsai - One of the best experts on this subject based on the ideXlab platform.
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performance of the taiwan rapid earthquake Information Release system rtd during the 1999 chi chi taiwan earthquake
Seismological Research Letters, 2000Co-Authors: William H K Lee, Chenchun Chen, Tzaychyn Shin, Taliang Teng, Yiben TsaiAbstract:A major earthquake occurred near the town of Chi-Chi in Nantou County, Taiwan, at 1:47 am (local time), 21 September 1999, about 150 km south of Taipei. This is the largest earthquake to have occurred on land in Taiwan during the 20th century. Although Taiwan has an earthquake building code, thousands of buildings collapsed due to the earthquake, leaving more than 100,000 people homeless. The death toll exceeded 2,300 with more than 10,000 injured. Within 102 seconds after the earthquake's origin time, a good estimate of the hypocenter (23.87° N, 120.75° E, Depth = 10 km) and magnitude ( ML = 7.3), and a shaking map were determined automatically by the RTD system. The result was immediately disseminated to governmental emergency response agencies electronically in four ways, by e-mail, World Wide Web, fax, and pager. This rapid Information system has been successfully operating in Taiwan for more than four years. During the Chi-Chi earthquake, the rapid availability of earthquake Information facilitated the emergency response. The RTD system worked very well throughout the whole aftershock sequence (several aftershocks had local magnitude of 6 or larger). Again this timely Information was useful to the emergency response teams. In this paper, we briefly describe the RTD system and summarize its performance during the Chi-Chi earthquake. The Taiwan Rapid Earthquake Information Release System (RTD) is based on a simple hardware/software design first introduced by Lee et al. (1989). This system was subsequently improved and refined (Lee, 1994; Lee et al., 1996; Shin et al., 1996; Wu et al., 1997, 1998, 1999). The RTD system consists of 61 telemetered strong-motion stations in Taiwan (Figure 1). Digital signals are continuously telemetered to the headquarters of the Central Weather Bureau (CWB) in Taipei via 4,800-baud leased telephone lines. Each telemetered signal contains …
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taiwan rapid earthquake Information Release system
Seismological Research Letters, 1997Co-Authors: Tzaychyn Shin, William H K Lee, Chenchun Chen, Yiben Tsai, Taliang TengAbstract:INTRODUCTION Interest in rapid access to earthquake Information has grown enormously in the past few years (Gee et al. , 1996; Teng et al. , 1997; Wu et al. , 1997). In addition to satisfying the public and media needs, rapid notification programs provide valuable Information for rapid earthquake disaster response, thereby mitigating the loss. Recognizing the importance of rapid earthquake Information for seismic hazard mitigation, efforts to design and implement systems to provide rapid earthquake Information have expanded over the last 10 years (Heaton, 1985; Nakamura and Tucker, 1988; Buland and Person, 1992; Romanowicz et al. , 1993; Bakun et al. , 1994; Espinosa Aranda et al. , 1995; Lee et al. , 1996; Shin et al. , 1996; Teng et al. , 1997; Wu et al. , 1997). In 1989, a telemetered, digital, short-period seismograph network of 75 three-component field stations was installed in Taiwan (see Figure 1) using Teledyne Geotech 1-Hz short-period sensors (Teledyne S13). The signals...
Andrei Sabelfeld - One of the best experts on this subject based on the ideXlab platform.
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tight enforcement of Information Release policies for dynamic languages
IEEE Computer Security Foundations Symposium, 2009Co-Authors: Aslan Askarov, Andrei SabelfeldAbstract:This paper studies the problem of securing Information Release in dynamic languages. We propose (i) an intuitive framework for Information-Release policies expressing both what can be Released by an application and where in the code this Release may take place and (ii) tight and modular enforcement by hybrid mechanisms that combine monitoring with on-the-fly static analysis for a language with dynamic code evaluation and communication primitives. The policy framework and enforcement mechanisms support both termination-sensitive and insensitive security policies.
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CSF - Tight Enforcement of Information-Release Policies for Dynamic Languages
2009 22nd IEEE Computer Security Foundations Symposium, 2009Co-Authors: Aslan Askarov, Andrei SabelfeldAbstract:This paper studies the problem of securing Information Release in dynamic languages. We propose (i) an intuitive framework for Information-Release policies expressing both what can be Released by an application and where in the code this Release may take place and (ii) tight and modular enforcement by hybrid mechanisms that combine monitoring with on-the-fly static analysis for a language with dynamic code evaluation and communication primitives. The policy framework and enforcement mechanisms support both termination-sensitive and insensitive security policies.
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localized delimited Release combining the what and where dimensions of Information Release
ACM Workshop on Programming Languages and Analysis for Security, 2007Co-Authors: Aslan Askarov, Andrei SabelfeldAbstract:Information Release (or declassification) policies are the key challenge for language-based Information security. Although much progress has been made, different approaches to Information Release tend to address different aspects of Information Release. In a recent classification, these aspects are referred to as what, who, where, and when dimensions of declassification. In order to avoid Information laundering, it is important to combine defense along the different dimensions. As a step in this direction, this paper presents a combination of what and where Information Release policies. Moreover, we show that a minor modification of a security type system from the literature (which was designed for treating the what dimension) in fact enforces the combination of what and where policies
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PLAS - Localized delimited Release: combining the what and where dimensions of Information Release
Proceedings of the 2007 workshop on Programming languages and analysis for security - PLAS '07, 2007Co-Authors: Aslan Askarov, Andrei SabelfeldAbstract:Information Release (or declassification) policies are the key challenge for language-based Information security. Although much progress has been made, different approaches to Information Release tend to address different aspects of Information Release. In a recent classification, these aspects are referred to as what, who, where, and when dimensions of declassification. In order to avoid Information laundering, it is important to combine defense along the different dimensions. As a step in this direction, this paper presents a combination of what and where Information Release policies. Moreover, we show that a minor modification of a security type system from the literature (which was designed for treating the what dimension) in fact enforces the combination of what and where policies
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a model for delimited Information Release
Lecture Notes in Computer Science, 2004Co-Authors: Andrei Sabelfeld, Andrew C MyersAbstract:Much work on security-typed languages lacks a satisfactory account of intentional Information Release. In the context of confidentiality, a typical security guarantee provided by security type systems is noninterference, which allows no Information flow from secret inputs to public outputs. However, many intuitively secure programs do allow some Release, or declassification, of secret Information (e.g., password checking, Information purchase, and spreadsheet computation). Noninterference fails to recognize such programs as secure. In this respect, many security type systems enforcing noninterference are impractical. On the other side of the spectrum are type systems designed to accommodate some Information leakage. However, there is often little or no guarantee about what is actually being leaked. As a consequence, such type systems are vulnerable to laundering attacks, which exploit declassification mechanisms to reveal more secret data than intended. To bridge this gap, this paper introduces a new security property, delimited Release, an end-to-end guarantee that declassification cannot be exploited to construct laundering attacks. In addition, a security type system is given that straightforwardly and provably enforces delimited Release.
Tzaychyn Shin - One of the best experts on this subject based on the ideXlab platform.
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performance of the taiwan rapid earthquake Information Release system rtd during the 1999 chi chi taiwan earthquake
Seismological Research Letters, 2000Co-Authors: William H K Lee, Chenchun Chen, Tzaychyn Shin, Taliang Teng, Yiben TsaiAbstract:A major earthquake occurred near the town of Chi-Chi in Nantou County, Taiwan, at 1:47 am (local time), 21 September 1999, about 150 km south of Taipei. This is the largest earthquake to have occurred on land in Taiwan during the 20th century. Although Taiwan has an earthquake building code, thousands of buildings collapsed due to the earthquake, leaving more than 100,000 people homeless. The death toll exceeded 2,300 with more than 10,000 injured. Within 102 seconds after the earthquake's origin time, a good estimate of the hypocenter (23.87° N, 120.75° E, Depth = 10 km) and magnitude ( ML = 7.3), and a shaking map were determined automatically by the RTD system. The result was immediately disseminated to governmental emergency response agencies electronically in four ways, by e-mail, World Wide Web, fax, and pager. This rapid Information system has been successfully operating in Taiwan for more than four years. During the Chi-Chi earthquake, the rapid availability of earthquake Information facilitated the emergency response. The RTD system worked very well throughout the whole aftershock sequence (several aftershocks had local magnitude of 6 or larger). Again this timely Information was useful to the emergency response teams. In this paper, we briefly describe the RTD system and summarize its performance during the Chi-Chi earthquake. The Taiwan Rapid Earthquake Information Release System (RTD) is based on a simple hardware/software design first introduced by Lee et al. (1989). This system was subsequently improved and refined (Lee, 1994; Lee et al., 1996; Shin et al., 1996; Wu et al., 1997, 1998, 1999). The RTD system consists of 61 telemetered strong-motion stations in Taiwan (Figure 1). Digital signals are continuously telemetered to the headquarters of the Central Weather Bureau (CWB) in Taipei via 4,800-baud leased telephone lines. Each telemetered signal contains …
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taiwan rapid earthquake Information Release system
Seismological Research Letters, 1997Co-Authors: Tzaychyn Shin, William H K Lee, Chenchun Chen, Yiben Tsai, Taliang TengAbstract:INTRODUCTION Interest in rapid access to earthquake Information has grown enormously in the past few years (Gee et al. , 1996; Teng et al. , 1997; Wu et al. , 1997). In addition to satisfying the public and media needs, rapid notification programs provide valuable Information for rapid earthquake disaster response, thereby mitigating the loss. Recognizing the importance of rapid earthquake Information for seismic hazard mitigation, efforts to design and implement systems to provide rapid earthquake Information have expanded over the last 10 years (Heaton, 1985; Nakamura and Tucker, 1988; Buland and Person, 1992; Romanowicz et al. , 1993; Bakun et al. , 1994; Espinosa Aranda et al. , 1995; Lee et al. , 1996; Shin et al. , 1996; Teng et al. , 1997; Wu et al. , 1997). In 1989, a telemetered, digital, short-period seismograph network of 75 three-component field stations was installed in Taiwan (see Figure 1) using Teledyne Geotech 1-Hz short-period sensors (Teledyne S13). The signals...
William H K Lee - One of the best experts on this subject based on the ideXlab platform.
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performance of the taiwan rapid earthquake Information Release system rtd during the 1999 chi chi taiwan earthquake
Seismological Research Letters, 2000Co-Authors: William H K Lee, Chenchun Chen, Tzaychyn Shin, Taliang Teng, Yiben TsaiAbstract:A major earthquake occurred near the town of Chi-Chi in Nantou County, Taiwan, at 1:47 am (local time), 21 September 1999, about 150 km south of Taipei. This is the largest earthquake to have occurred on land in Taiwan during the 20th century. Although Taiwan has an earthquake building code, thousands of buildings collapsed due to the earthquake, leaving more than 100,000 people homeless. The death toll exceeded 2,300 with more than 10,000 injured. Within 102 seconds after the earthquake's origin time, a good estimate of the hypocenter (23.87° N, 120.75° E, Depth = 10 km) and magnitude ( ML = 7.3), and a shaking map were determined automatically by the RTD system. The result was immediately disseminated to governmental emergency response agencies electronically in four ways, by e-mail, World Wide Web, fax, and pager. This rapid Information system has been successfully operating in Taiwan for more than four years. During the Chi-Chi earthquake, the rapid availability of earthquake Information facilitated the emergency response. The RTD system worked very well throughout the whole aftershock sequence (several aftershocks had local magnitude of 6 or larger). Again this timely Information was useful to the emergency response teams. In this paper, we briefly describe the RTD system and summarize its performance during the Chi-Chi earthquake. The Taiwan Rapid Earthquake Information Release System (RTD) is based on a simple hardware/software design first introduced by Lee et al. (1989). This system was subsequently improved and refined (Lee, 1994; Lee et al., 1996; Shin et al., 1996; Wu et al., 1997, 1998, 1999). The RTD system consists of 61 telemetered strong-motion stations in Taiwan (Figure 1). Digital signals are continuously telemetered to the headquarters of the Central Weather Bureau (CWB) in Taipei via 4,800-baud leased telephone lines. Each telemetered signal contains …
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taiwan rapid earthquake Information Release system
Seismological Research Letters, 1997Co-Authors: Tzaychyn Shin, William H K Lee, Chenchun Chen, Yiben Tsai, Taliang TengAbstract:INTRODUCTION Interest in rapid access to earthquake Information has grown enormously in the past few years (Gee et al. , 1996; Teng et al. , 1997; Wu et al. , 1997). In addition to satisfying the public and media needs, rapid notification programs provide valuable Information for rapid earthquake disaster response, thereby mitigating the loss. Recognizing the importance of rapid earthquake Information for seismic hazard mitigation, efforts to design and implement systems to provide rapid earthquake Information have expanded over the last 10 years (Heaton, 1985; Nakamura and Tucker, 1988; Buland and Person, 1992; Romanowicz et al. , 1993; Bakun et al. , 1994; Espinosa Aranda et al. , 1995; Lee et al. , 1996; Shin et al. , 1996; Teng et al. , 1997; Wu et al. , 1997). In 1989, a telemetered, digital, short-period seismograph network of 75 three-component field stations was installed in Taiwan (see Figure 1) using Teledyne Geotech 1-Hz short-period sensors (Teledyne S13). The signals...