Growing numbers of users and many access control policies which involve many different resource attributes in service-oriented environments bring various problems in protecting resource.This paper analyzes the relatio...Growing numbers of users and many access control policies which involve many different resource attributes in service-oriented environments bring various problems in protecting resource.This paper analyzes the relationships of resource attributes to user attributes in all policies, and propose a general attribute and rule based role-based access control(GAR-RBAC) model to meet the security needs. The model can dynamically assign users to roles via rules to meet the need of growing numbers of users. These rules use different attribute expression and permission as a part of authorization constraints, and are defined by analyzing relations of resource attributes to user attributes in many access policies that are defined by the enterprise. The model is a general access control model, and can support many access control policies, and also can be used to wider application for service. The paper also describes how to use the GAR-RBAC model in Web service environments.展开更多
PMI （privilege management infrastructure） is used to perform access control to resource in an E-commerce or E-government system. With the ever-increasing need for secure transaction, the need for systems that offer ...PMI （privilege management infrastructure） is used to perform access control to resource in an E-commerce or E-government system. With the ever-increasing need for secure transaction, the need for systems that offer a wide variety of QoS （quality-of-service） features is also growing. In order to improve the QoS of PMI system, a cache based on RBAC （Role-based Access control） and trust is proposed. Our system is realized based on Web service. How to design the cache based on RBAC and trust in the access control model is deseribed in detail. The algorithm to query role permission in cache and to add records in cache is dealt with. The policy to update cache is introduced also.展开更多
Introduction: This study assesses rural providers’ perceptions of their ability to deliver high quality care via telehealth compared to usual care, and whether attending providers perceive that emergency department (...Introduction: This study assesses rural providers’ perceptions of their ability to deliver high quality care via telehealth compared to usual care, and whether attending providers perceive that emergency department (ED) telehealth visits influence clinical reasoning in regard to patient disposition, specifically in tele-behavioral and tele-neurological cases. Methods: A cross-sectional survey was conducted of 134 ED providers (nurses [n = 126] and physicians [n = 8]) who were working in five Midwestern critical access hospitals (response rate 83%). Descriptive, correlational and stepwise regression analyses were employed to evaluate provider perceptions of 1) competency level in telehealth delivery, 2) patient health outcomes, 3) access to continuing education in telehealth, and 4) clinical influence of telehealth visit. Evaluation of preliminary set of N = 100 telehealth cases were assessed for influence of telehealth on clinical reasoning of attending physicians regarding patient disposition. Results: The majority (67%;n = 90) of participants had at least minimal experience with telehealth care delivery, with an average of 1 - 2 visits in teleneurology, and 3 - 4 visits in telebehavioral cases. Providers rated their overall mean competency level in telehealth care delivery as 3.01/5.00 based on a 5 point “novice (1) to expert” (5) scale. Mean scores for providers perceived competency level in 7 evidence-based sub-categories for telehealth care delivery were self-reported as relatively low to mid-range values, ranging from 2.64 - 3.57/5.00. Stepwise linear regression analysis of whether all providers “would recommend telehealth to their family and friends” revealed two predictors for model of best fit (n = 81;p 2 = 0.598): 1) their perceptions of telehealth experience compared to usual care;and 2) perceptions of patient health outcomes with telehealth compared to usual care. Providers rated “neutral” to “very unlikely” that they “would recommend telehealth to family and friends” (2.75/5.00;n = 122;91%). Attending physicians reported that for a majority of cases, telehealth visits influenced patient disposition and transfer decision-making (58.4%), and the influence of telehealth visits on patient disposition was statistically significantly higher for behavioral health cases (p Discussion: This study will be followed on to inform administrators/policy makers about 1) perceived level of competency of providers who implement tele-emergency care, 2) potential importance of telehealth equipment used and teamwork between rural providers and distant specialist, and 3) how use of telehealth may enhance ability of rural ED providers to improve quality of care. Perceived influence of telehealth on patient disposition is reported to be highest for telebehavioral patients. Healthcare educators need to place a priority on addressing provider competencies in telehealth through health professions degree programs and continuing education. Further research is needed to promote application and testing of evidence-based provider competencies in telehealth, and potentially relevant health communication models, to increase providers’ perceived efficacy and competency in telehealth care delivery, thus supporting high quality patient health outcomes.展开更多
BACKGROUND Emergency situations in inflammatory bowel diseases(IBD)put significant burden on both the patient and the healthcare system.AIM To prospectively measure Quality-of-Care indicators and resource utilization ...BACKGROUND Emergency situations in inflammatory bowel diseases(IBD)put significant burden on both the patient and the healthcare system.AIM To prospectively measure Quality-of-Care indicators and resource utilization after the implementation of the new rapid access clinic service(RAC)at a tertiary IBD center.METHODS Patient access,resource utilization and outcome parameters were collected from consecutive patients contacting the RAC between July 2017 and March 2019 in this observational study.For comparing resource utilization and healthcare costs,emergency department(ED)visits of IBD patients with no access to RAC services were evaluated between January 2018 and January 2019.Time to appointment,diagnostic methods,change in medical therapy,unplanned ED visits,hospitalizations and surgical admissions were calculated and compared.RESULTS 488 patients(Crohn’s disease:68.4%/ulcerative colitis:31.6%)contacted the RAC with a valid medical reason.Median time to visit with an IBD specialist following the index contact was 2 d.Patients had objective clinical and laboratory assessment(C-reactive protein and fecal calprotectin in 91%and 73%).Fast-track colonoscopy/sigmoidoscopy was performed in 24.6%of the patients,while computed tomography/magnetic resonance imaging in only 8.1%.Medical therapy was changed in 54.4%.ED visits within 30 d following the RAC visit occurred in 8.8%(unplanned ED visit rate:5.9%).Diagnostic procedures and resource utilization at the ED(n=135 patients)were substantially different compared to RAC users:Abdominal computed tomography was more frequent(65.7%,P<0.001),coupled with multiple specialist consults,more frequent hospital admission(P<0.001),higher steroid initiation(P<0.001).Average medical cost estimates of diagnostic procedures and services per patient was$403 CAD vs$1885 CAD comparing all RAC and ED visits.CONCLUSION Implementation of a RAC improved patient care by facilitating easier access to IBD specific medical care,optimized resource utilization and helped avoiding ED visits and subsequent hospitalizations.展开更多
基金The National Natural Science Foundation of China(No60402019No60672068)
文摘Growing numbers of users and many access control policies which involve many different resource attributes in service-oriented environments bring various problems in protecting resource.This paper analyzes the relationships of resource attributes to user attributes in all policies, and propose a general attribute and rule based role-based access control(GAR-RBAC) model to meet the security needs. The model can dynamically assign users to roles via rules to meet the need of growing numbers of users. These rules use different attribute expression and permission as a part of authorization constraints, and are defined by analyzing relations of resource attributes to user attributes in many access policies that are defined by the enterprise. The model is a general access control model, and can support many access control policies, and also can be used to wider application for service. The paper also describes how to use the GAR-RBAC model in Web service environments.
基金Supported by the National Tenth Five-rear Planfor Scientific and Technological Development of China (413160501)the National Natural Science Foundation of China (50477038)
文摘PMI （privilege management infrastructure） is used to perform access control to resource in an E-commerce or E-government system. With the ever-increasing need for secure transaction, the need for systems that offer a wide variety of QoS （quality-of-service） features is also growing. In order to improve the QoS of PMI system, a cache based on RBAC （Role-based Access control） and trust is proposed. Our system is realized based on Web service. How to design the cache based on RBAC and trust in the access control model is deseribed in detail. The algorithm to query role permission in cache and to add records in cache is dealt with. The policy to update cache is introduced also.
文摘Introduction: This study assesses rural providers’ perceptions of their ability to deliver high quality care via telehealth compared to usual care, and whether attending providers perceive that emergency department (ED) telehealth visits influence clinical reasoning in regard to patient disposition, specifically in tele-behavioral and tele-neurological cases. Methods: A cross-sectional survey was conducted of 134 ED providers (nurses [n = 126] and physicians [n = 8]) who were working in five Midwestern critical access hospitals (response rate 83%). Descriptive, correlational and stepwise regression analyses were employed to evaluate provider perceptions of 1) competency level in telehealth delivery, 2) patient health outcomes, 3) access to continuing education in telehealth, and 4) clinical influence of telehealth visit. Evaluation of preliminary set of N = 100 telehealth cases were assessed for influence of telehealth on clinical reasoning of attending physicians regarding patient disposition. Results: The majority (67%;n = 90) of participants had at least minimal experience with telehealth care delivery, with an average of 1 - 2 visits in teleneurology, and 3 - 4 visits in telebehavioral cases. Providers rated their overall mean competency level in telehealth care delivery as 3.01/5.00 based on a 5 point “novice (1) to expert” (5) scale. Mean scores for providers perceived competency level in 7 evidence-based sub-categories for telehealth care delivery were self-reported as relatively low to mid-range values, ranging from 2.64 - 3.57/5.00. Stepwise linear regression analysis of whether all providers “would recommend telehealth to their family and friends” revealed two predictors for model of best fit (n = 81;p 2 = 0.598): 1) their perceptions of telehealth experience compared to usual care;and 2) perceptions of patient health outcomes with telehealth compared to usual care. Providers rated “neutral” to “very unlikely” that they “would recommend telehealth to family and friends” (2.75/5.00;n = 122;91%). Attending physicians reported that for a majority of cases, telehealth visits influenced patient disposition and transfer decision-making (58.4%), and the influence of telehealth visits on patient disposition was statistically significantly higher for behavioral health cases (p Discussion: This study will be followed on to inform administrators/policy makers about 1) perceived level of competency of providers who implement tele-emergency care, 2) potential importance of telehealth equipment used and teamwork between rural providers and distant specialist, and 3) how use of telehealth may enhance ability of rural ED providers to improve quality of care. Perceived influence of telehealth on patient disposition is reported to be highest for telebehavioral patients. Healthcare educators need to place a priority on addressing provider competencies in telehealth through health professions degree programs and continuing education. Further research is needed to promote application and testing of evidence-based provider competencies in telehealth, and potentially relevant health communication models, to increase providers’ perceived efficacy and competency in telehealth care delivery, thus supporting high quality patient health outcomes.
文摘BACKGROUND Emergency situations in inflammatory bowel diseases(IBD)put significant burden on both the patient and the healthcare system.AIM To prospectively measure Quality-of-Care indicators and resource utilization after the implementation of the new rapid access clinic service(RAC)at a tertiary IBD center.METHODS Patient access,resource utilization and outcome parameters were collected from consecutive patients contacting the RAC between July 2017 and March 2019 in this observational study.For comparing resource utilization and healthcare costs,emergency department(ED)visits of IBD patients with no access to RAC services were evaluated between January 2018 and January 2019.Time to appointment,diagnostic methods,change in medical therapy,unplanned ED visits,hospitalizations and surgical admissions were calculated and compared.RESULTS 488 patients(Crohn’s disease:68.4%/ulcerative colitis:31.6%)contacted the RAC with a valid medical reason.Median time to visit with an IBD specialist following the index contact was 2 d.Patients had objective clinical and laboratory assessment(C-reactive protein and fecal calprotectin in 91%and 73%).Fast-track colonoscopy/sigmoidoscopy was performed in 24.6%of the patients,while computed tomography/magnetic resonance imaging in only 8.1%.Medical therapy was changed in 54.4%.ED visits within 30 d following the RAC visit occurred in 8.8%(unplanned ED visit rate:5.9%).Diagnostic procedures and resource utilization at the ED(n=135 patients)were substantially different compared to RAC users:Abdominal computed tomography was more frequent(65.7%,P<0.001),coupled with multiple specialist consults,more frequent hospital admission(P<0.001),higher steroid initiation(P<0.001).Average medical cost estimates of diagnostic procedures and services per patient was$403 CAD vs$1885 CAD comparing all RAC and ED visits.CONCLUSION Implementation of a RAC improved patient care by facilitating easier access to IBD specific medical care,optimized resource utilization and helped avoiding ED visits and subsequent hospitalizations.
