The growing demand for international travel has highlighted the critical need for reliable tools to verify travelers’healthcare status and meet entry requirements.Personal health passports,while essential,face signif...The growing demand for international travel has highlighted the critical need for reliable tools to verify travelers’healthcare status and meet entry requirements.Personal health passports,while essential,face significant challenges related to data silos,privacy protection,and forgery risks in global sharing.To address these issues,this study proposes a blockchain-based solution designed for the secure storage,sharing,and verification of personal health passports.This innovative approach combines on-chain and off-chain storage,leveraging searchable encryption to enhance data security and optimize blockchain storage efficiency.By reducing the storage burden on the blockchain,the system ensures both the secure handling and reliable sharing of sensitive personal health data.An optimized consensus mechanism streamlines the process into two stages,minimizing communication complexity among nodes and significantly improving the throughput of the blockchain system.Additionally,the introduction of advanced aggregate signature technology accommodates multi-user scenarios,reducing computational overhead for signature verification and enabling swift identification ofmalicious forgers.Comprehensive security analyses validate the system’s robustness and reliability.Simulation results demonstrate notable performance improvements over existing solutions,with reductions in computational overhead of up to 49.89%and communication overhead of up to 25.81%inmulti-user scenarios.Furthermore,the optimized consensus mechanism shows substantial efficiency gains across varying node configurations.This solution represents a significant step toward addressing the pressing challenges of health passport management in a secure,scalable,and efficient manner.展开更多
The passport option is a call option on the balance of a trading account. The option holder retains the gain from trading, while the issuer is liable for the net loss. In this article, the mathematical foundation for ...The passport option is a call option on the balance of a trading account. The option holder retains the gain from trading, while the issuer is liable for the net loss. In this article, the mathematical foundation for pricing the European passport option is established. The pricing equation which is a fully nonlinear equation is derived using the dynamic programming principle. The comparison principle, uniqueness and convexity preserving of the viscosity solutions of related H J13 equation are proved. A relationship between the passport and lookback options is discussed.展开更多
This paper reviews the development of Lib-PassPort service program by Jiangsu Academic Library & Information System(JALIS). The service has realized a reader self-directed method of interlibrary loan of printed bo...This paper reviews the development of Lib-PassPort service program by Jiangsu Academic Library & Information System(JALIS). The service has realized a reader self-directed method of interlibrary loan of printed books at more than 130 university libraries within Jiangsu Province of China in the last 5 years and with a cumulative interlibrary circulation of nearly 190,000 volumes. The paper describes the framework of the clientele, structure, functions, policies, and management mechanisms of the services, and demonstrates its contribution to the improved accessibility of library materials in the region.展开更多
当第一次听说5 T B的便携硬盘时,我的第一反应是“这一定是两块硬盘合体的产物”。不过,直到我对WD My Passport 5TB(WDBPKJ0050BBK)进行了测试后,方才发现是外壳里面所容纳的的确是一块容量达到5TB的2.5英寸硬盘。不过,在官网并没能找...当第一次听说5 T B的便携硬盘时,我的第一反应是“这一定是两块硬盘合体的产物”。不过,直到我对WD My Passport 5TB(WDBPKJ0050BBK)进行了测试后,方才发现是外壳里面所容纳的的确是一块容量达到5TB的2.5英寸硬盘。不过,在官网并没能找到其所内置的特殊2.5英寸硬盘的资料。展开更多
文摘The growing demand for international travel has highlighted the critical need for reliable tools to verify travelers’healthcare status and meet entry requirements.Personal health passports,while essential,face significant challenges related to data silos,privacy protection,and forgery risks in global sharing.To address these issues,this study proposes a blockchain-based solution designed for the secure storage,sharing,and verification of personal health passports.This innovative approach combines on-chain and off-chain storage,leveraging searchable encryption to enhance data security and optimize blockchain storage efficiency.By reducing the storage burden on the blockchain,the system ensures both the secure handling and reliable sharing of sensitive personal health data.An optimized consensus mechanism streamlines the process into two stages,minimizing communication complexity among nodes and significantly improving the throughput of the blockchain system.Additionally,the introduction of advanced aggregate signature technology accommodates multi-user scenarios,reducing computational overhead for signature verification and enabling swift identification ofmalicious forgers.Comprehensive security analyses validate the system’s robustness and reliability.Simulation results demonstrate notable performance improvements over existing solutions,with reductions in computational overhead of up to 49.89%and communication overhead of up to 25.81%inmulti-user scenarios.Furthermore,the optimized consensus mechanism shows substantial efficiency gains across varying node configurations.This solution represents a significant step toward addressing the pressing challenges of health passport management in a secure,scalable,and efficient manner.
基金supported in partby National Science Foundation of China (10371088,10671144)National Basic Research Program of China(2007CB814903)+3 种基金Development Funds of Shanghai Higher Education (05D210)the Special Funds for Major Specialties of Shanghai Education Committee (T0401)Supported by Special Fund for the Excellent Young Teachers of Shanghai Higher Learning Institutions (ssd08029)the Research Program of Shanghai Normal University (SK200812)
文摘The passport option is a call option on the balance of a trading account. The option holder retains the gain from trading, while the issuer is liable for the net loss. In this article, the mathematical foundation for pricing the European passport option is established. The pricing equation which is a fully nonlinear equation is derived using the dynamic programming principle. The comparison principle, uniqueness and convexity preserving of the viscosity solutions of related H J13 equation are proved. A relationship between the passport and lookback options is discussed.
文摘This paper reviews the development of Lib-PassPort service program by Jiangsu Academic Library & Information System(JALIS). The service has realized a reader self-directed method of interlibrary loan of printed books at more than 130 university libraries within Jiangsu Province of China in the last 5 years and with a cumulative interlibrary circulation of nearly 190,000 volumes. The paper describes the framework of the clientele, structure, functions, policies, and management mechanisms of the services, and demonstrates its contribution to the improved accessibility of library materials in the region.
文摘当第一次听说5 T B的便携硬盘时,我的第一反应是“这一定是两块硬盘合体的产物”。不过,直到我对WD My Passport 5TB(WDBPKJ0050BBK)进行了测试后,方才发现是外壳里面所容纳的的确是一块容量达到5TB的2.5英寸硬盘。不过,在官网并没能找到其所内置的特殊2.5英寸硬盘的资料。
