The Experts below are selected from a list of 152124 Experts worldwide ranked by ideXlab platform
Nicholas S Hengl - One of the best experts on this subject based on the ideXlab platform.
-
a randomized trial of a hepatitis care Coordination Model in methadone maintenance treatment
American Journal of Public Health, 2013Co-Authors: Carmen L Masson, Kevin L Delucchi, Courtney Mcknight, Jennifer E Hettema, Mandana Khalili, Albert D Min, Ashly E Jordan, Nicole Pepper, Jessica Hall, Nicholas S HenglAbstract:Objectives. We evaluated the efficacy of a hepatitis care Coordination intervention to improve linkage to hepatitis A virus (HAV) and hepatitis B virus (HBV) vaccination and clinical evaluation of hepatitis C virus (HCV) infection among methadone maintenance patients.Methods. We conducted a randomized controlled trial of 489 participants from methadone maintenance treatment programs in San Francisco, California, and New York City from February 2008 through June 2011. We randomized participants to a control arm (n = 245) and an intervention arm (n = 244), which included on-site screening, motivational-enhanced education and counseling, on-site vaccination, and case management services.Results. Compared with the control group, intervention group participants were significantly more likely (odds ratio [OR] = 41.8; 95% confidence interval [CI] = 19.4, 90.0) to receive their first vaccine dose within 30 days and to receive an HCV evaluation within 6 months (OR = 4.10; 95% CI = 2.35, 7.17). A combined intervent...
-
a randomized trial of a hepatitis care Coordination Model in methadone maintenance treatment
American Journal of Public Health, 2013Co-Authors: Carmen L Masson, Kevin L Delucchi, Courtney Mcknight, Jennifer E Hettema, Mandana Khalili, Albert D Min, Ashly E Jordan, Nicole Pepper, Jessica Hall, Nicholas S HenglAbstract:We evaluated the efficacy of a hepatitis care Coordination intervention to improve linkage to hepatitis A virus (HAV) and hepatitis B virus (HBV) vaccination and clinical evaluation of hepatitis C virus (HCV) infection among methadone maintenance patients.We conducted a randomized controlled trial of 489 participants from methadone maintenance treatment programs in San Francisco, California, and New York City from February 2008 through June 2011. We randomized participants to a control arm (n = 245) and an intervention arm (n = 244), which included on-site screening, motivational-enhanced education and counseling, on-site vaccination, and case management services.Compared with the control group, intervention group participants were significantly more likely (odds ratio [OR] = 41.8; 95% confidence interval [CI] = 19.4, 90.0) to receive their first vaccine dose within 30 days and to receive an HCV evaluation within 6 months (OR = 4.10; 95% CI = 2.35, 7.17). A combined intervention adherence outcome that measured adherence to HAV-HBV vaccination, HCV evaluation, or both strongly favored the intervention group (OR = 8.70; 95% CI = 5.56, 13.61).Hepatitis care Coordination was efficacious in increasing adherence to HAV-HBV vaccination and HCV clinical evaluation among methadone patients.
Joni Da Silva Fraga - One of the best experts on this subject based on the ideXlab platform.
-
depspace a byzantine fault tolerant Coordination service
European Conference on Computer Systems, 2008Co-Authors: Alysson Bessani, Eduardo Pelison Alchieri, Miguel Correia, Joni Da Silva FragaAbstract:The tuple space Coordination Model is one of the most interesting Coordination Models for open distributed systems due to its space and time decoupling and its synchronization power. Several works have tried to improve the dependability of tuple spaces through the use of replication for fault tolerance and access control for security. However, many practical applications in the Internet require both fault tolerance and security. This paper describes the design and implementation of DepSpace, a Byzantine fault-tolerant Coordination service that provides a tuple space abstraction. The service offered by DepSpace is secure, reliable and available as long as less than a third of service replicas are faulty. Moreover, the content-addressable confidentiality scheme developed for DepSpace bridges the gap between Byzantine fault-tolerant replication and confidentiality of replicated data and can be used in other systems that store critical data.
-
design and implementation of an intrusion tolerant tuple space
2007Co-Authors: Alysson Bessani, Eduardo Pelison Alchieri, Joni Da Silva Fraga, Lau Cheuk LungAbstract:The tuple space Coordination Model is one of the most interesting communication Models for open distributed systems due to its space and time decoupling and its synchronization power. Several works have tried to improve the dependability of tuple spaces. Some have made tuple spaces fault-tolerant while others have focused on security. However, many practical applications in the Internet require both these dimensions. This paper describes the design and implementation of DEPSPACE, a dependable communication infrastructure based on the tuple space Coordination Model. DEPSPACE is dependable in a strong sense of the word: it is secure, fault-tolerant and intrusion-tolerant, i.e. it behaves as expected even if some of the machines that implement it are successfully attacked. Moreover, it is a policy-enforced augmented tuple space, a shared memory object that we have recently proven to be universal, i.e., capable of implementing any other shared memory object.
-
bts a byzantine fault tolerant tuple space
ACM Symposium on Applied Computing, 2006Co-Authors: Alysson Bessani, Joni Da Silva Fraga, Lau Cheuk LungAbstract:Generative Coordination is one of the most prominent Coordination Models for implementing open systems due to its spatial and temporal decoupling. Recently, a Coordination community effort have been trying to integrate security mechanisms to this Model aiming to improve its robustness. In this context, this paper presents the BTS Coordination Model, which provides a Byzantine fault-tolerant tuple space. Byzantine faults are commonly used to represent both process crashes and intrusions. As far as we know. BTS is the first Coordination Model that supports this dependability level.
-
towards a dependable tuple space
2006Co-Authors: Alysson Bessani, Miguel Correia, Joni Da Silva Fraga, Lau Cheuk LungAbstract:The tuple space Coordination Model is one of the most interesting communication Models for open distributed systems due to its space and time decoupling and its synchronization power. Several works have tried to improve the dependability of tuple spaces. Some have made tuple spaces fault-tolerant, using mechanisms like replication and transactions. Others have put the emphasis on security, with mechanisms like access control and cryptography. However, many practical applications in the Internet require both these dimensions. This paper describes how a set of commercial off-the-shelf (COTS) tuple spaces can be used to implement a dependable (distributed) tuple space. This tuple space is dependable in a strong sense of the word: it is secure, fault-tolerant and intrusion-tolerant, i.e. it behaves as expected even if some of the machines that implement it are successfully attacked.
Alysson Bessani - One of the best experts on this subject based on the ideXlab platform.
-
depspace a byzantine fault tolerant Coordination service
European Conference on Computer Systems, 2008Co-Authors: Alysson Bessani, Eduardo Pelison Alchieri, Miguel Correia, Joni Da Silva FragaAbstract:The tuple space Coordination Model is one of the most interesting Coordination Models for open distributed systems due to its space and time decoupling and its synchronization power. Several works have tried to improve the dependability of tuple spaces through the use of replication for fault tolerance and access control for security. However, many practical applications in the Internet require both fault tolerance and security. This paper describes the design and implementation of DepSpace, a Byzantine fault-tolerant Coordination service that provides a tuple space abstraction. The service offered by DepSpace is secure, reliable and available as long as less than a third of service replicas are faulty. Moreover, the content-addressable confidentiality scheme developed for DepSpace bridges the gap between Byzantine fault-tolerant replication and confidentiality of replicated data and can be used in other systems that store critical data.
-
design and implementation of an intrusion tolerant tuple space
2007Co-Authors: Alysson Bessani, Eduardo Pelison Alchieri, Joni Da Silva Fraga, Lau Cheuk LungAbstract:The tuple space Coordination Model is one of the most interesting communication Models for open distributed systems due to its space and time decoupling and its synchronization power. Several works have tried to improve the dependability of tuple spaces. Some have made tuple spaces fault-tolerant while others have focused on security. However, many practical applications in the Internet require both these dimensions. This paper describes the design and implementation of DEPSPACE, a dependable communication infrastructure based on the tuple space Coordination Model. DEPSPACE is dependable in a strong sense of the word: it is secure, fault-tolerant and intrusion-tolerant, i.e. it behaves as expected even if some of the machines that implement it are successfully attacked. Moreover, it is a policy-enforced augmented tuple space, a shared memory object that we have recently proven to be universal, i.e., capable of implementing any other shared memory object.
-
bts a byzantine fault tolerant tuple space
ACM Symposium on Applied Computing, 2006Co-Authors: Alysson Bessani, Joni Da Silva Fraga, Lau Cheuk LungAbstract:Generative Coordination is one of the most prominent Coordination Models for implementing open systems due to its spatial and temporal decoupling. Recently, a Coordination community effort have been trying to integrate security mechanisms to this Model aiming to improve its robustness. In this context, this paper presents the BTS Coordination Model, which provides a Byzantine fault-tolerant tuple space. Byzantine faults are commonly used to represent both process crashes and intrusions. As far as we know. BTS is the first Coordination Model that supports this dependability level.
-
towards a dependable tuple space
2006Co-Authors: Alysson Bessani, Miguel Correia, Joni Da Silva Fraga, Lau Cheuk LungAbstract:The tuple space Coordination Model is one of the most interesting communication Models for open distributed systems due to its space and time decoupling and its synchronization power. Several works have tried to improve the dependability of tuple spaces. Some have made tuple spaces fault-tolerant, using mechanisms like replication and transactions. Others have put the emphasis on security, with mechanisms like access control and cryptography. However, many practical applications in the Internet require both these dimensions. This paper describes how a set of commercial off-the-shelf (COTS) tuple spaces can be used to implement a dependable (distributed) tuple space. This tuple space is dependable in a strong sense of the word: it is secure, fault-tolerant and intrusion-tolerant, i.e. it behaves as expected even if some of the machines that implement it are successfully attacked.
Lau Cheuk Lung - One of the best experts on this subject based on the ideXlab platform.
-
design and implementation of an intrusion tolerant tuple space
2007Co-Authors: Alysson Bessani, Eduardo Pelison Alchieri, Joni Da Silva Fraga, Lau Cheuk LungAbstract:The tuple space Coordination Model is one of the most interesting communication Models for open distributed systems due to its space and time decoupling and its synchronization power. Several works have tried to improve the dependability of tuple spaces. Some have made tuple spaces fault-tolerant while others have focused on security. However, many practical applications in the Internet require both these dimensions. This paper describes the design and implementation of DEPSPACE, a dependable communication infrastructure based on the tuple space Coordination Model. DEPSPACE is dependable in a strong sense of the word: it is secure, fault-tolerant and intrusion-tolerant, i.e. it behaves as expected even if some of the machines that implement it are successfully attacked. Moreover, it is a policy-enforced augmented tuple space, a shared memory object that we have recently proven to be universal, i.e., capable of implementing any other shared memory object.
-
bts a byzantine fault tolerant tuple space
ACM Symposium on Applied Computing, 2006Co-Authors: Alysson Bessani, Joni Da Silva Fraga, Lau Cheuk LungAbstract:Generative Coordination is one of the most prominent Coordination Models for implementing open systems due to its spatial and temporal decoupling. Recently, a Coordination community effort have been trying to integrate security mechanisms to this Model aiming to improve its robustness. In this context, this paper presents the BTS Coordination Model, which provides a Byzantine fault-tolerant tuple space. Byzantine faults are commonly used to represent both process crashes and intrusions. As far as we know. BTS is the first Coordination Model that supports this dependability level.
-
towards a dependable tuple space
2006Co-Authors: Alysson Bessani, Miguel Correia, Joni Da Silva Fraga, Lau Cheuk LungAbstract:The tuple space Coordination Model is one of the most interesting communication Models for open distributed systems due to its space and time decoupling and its synchronization power. Several works have tried to improve the dependability of tuple spaces. Some have made tuple spaces fault-tolerant, using mechanisms like replication and transactions. Others have put the emphasis on security, with mechanisms like access control and cryptography. However, many practical applications in the Internet require both these dimensions. This paper describes how a set of commercial off-the-shelf (COTS) tuple spaces can be used to implement a dependable (distributed) tuple space. This tuple space is dependable in a strong sense of the word: it is secure, fault-tolerant and intrusion-tolerant, i.e. it behaves as expected even if some of the machines that implement it are successfully attacked.
Carmen L Masson - One of the best experts on this subject based on the ideXlab platform.
-
a randomized trial of a hepatitis care Coordination Model in methadone maintenance treatment
American Journal of Public Health, 2013Co-Authors: Carmen L Masson, Kevin L Delucchi, Courtney Mcknight, Jennifer E Hettema, Mandana Khalili, Albert D Min, Ashly E Jordan, Nicole Pepper, Jessica Hall, Nicholas S HenglAbstract:Objectives. We evaluated the efficacy of a hepatitis care Coordination intervention to improve linkage to hepatitis A virus (HAV) and hepatitis B virus (HBV) vaccination and clinical evaluation of hepatitis C virus (HCV) infection among methadone maintenance patients.Methods. We conducted a randomized controlled trial of 489 participants from methadone maintenance treatment programs in San Francisco, California, and New York City from February 2008 through June 2011. We randomized participants to a control arm (n = 245) and an intervention arm (n = 244), which included on-site screening, motivational-enhanced education and counseling, on-site vaccination, and case management services.Results. Compared with the control group, intervention group participants were significantly more likely (odds ratio [OR] = 41.8; 95% confidence interval [CI] = 19.4, 90.0) to receive their first vaccine dose within 30 days and to receive an HCV evaluation within 6 months (OR = 4.10; 95% CI = 2.35, 7.17). A combined intervent...
-
a randomized trial of a hepatitis care Coordination Model in methadone maintenance treatment
American Journal of Public Health, 2013Co-Authors: Carmen L Masson, Kevin L Delucchi, Courtney Mcknight, Jennifer E Hettema, Mandana Khalili, Albert D Min, Ashly E Jordan, Nicole Pepper, Jessica Hall, Nicholas S HenglAbstract:We evaluated the efficacy of a hepatitis care Coordination intervention to improve linkage to hepatitis A virus (HAV) and hepatitis B virus (HBV) vaccination and clinical evaluation of hepatitis C virus (HCV) infection among methadone maintenance patients.We conducted a randomized controlled trial of 489 participants from methadone maintenance treatment programs in San Francisco, California, and New York City from February 2008 through June 2011. We randomized participants to a control arm (n = 245) and an intervention arm (n = 244), which included on-site screening, motivational-enhanced education and counseling, on-site vaccination, and case management services.Compared with the control group, intervention group participants were significantly more likely (odds ratio [OR] = 41.8; 95% confidence interval [CI] = 19.4, 90.0) to receive their first vaccine dose within 30 days and to receive an HCV evaluation within 6 months (OR = 4.10; 95% CI = 2.35, 7.17). A combined intervention adherence outcome that measured adherence to HAV-HBV vaccination, HCV evaluation, or both strongly favored the intervention group (OR = 8.70; 95% CI = 5.56, 13.61).Hepatitis care Coordination was efficacious in increasing adherence to HAV-HBV vaccination and HCV clinical evaluation among methadone patients.