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BACKGROUND Computerized cognitive tests may serve as a preliminary, low-cost method to identify individuals with suspected cognitive impairment in the community. OBJECTIVE To develop a self-administered computerized test, namely the "Computerized Cognitive Screen (CoCoSc), Hong Kong version", for screening of individuals with cognitive impairment (CI) in community settings. METHODS The CoCoSc is a 15-min computerized cognitive screen covering memory, executive functions, orientation, attention and working memory, and prospective memory administered on a touchscreen computer. Individuals with CI and cognitively normal controls were administered the CoCoSc and the Montreal Cognitive Assessment (MoCA). Validity of the CoCoSc was assessed based on the relationship with the MoCA using Pearson correlation. Receiver operating characteristic curve (ROC) was used to examine the ability of the CoCoSc to differentiate CI from controls. RESULTS Fifty-nine individuals with CI and 101 controls were recruited. Seventy-five (46.9%) participants had ≤6 years of education. Performance on the CoCoSc differed between normal and CI groups in both low and high education subgroups. Total scores of the CoCoSc and MoCA were significantly correlated (r = 0.71, p

In previous research work, we proposed an integrated framework to guide the design of a Mobile Agent based Network Management (MANM) system, namely the Mobile Agent based framework for Security enhanced Autonomous network and system Management (MASAM). This framework offered two distinct advantages: (1) the provision of a secure agent-based management infrastructure and (2) the capability of achieving enhanced network management functionalities. In this paper, we propose two novel security schemes, namely the Visibility Domain Protection Scheme (VDPS) and the Visa Based Authentication Scheme (VBAS), for protection of management information and authentication and resource access control of management agents, respectively. These schemes seamlessly fit into the modular MASAM framework and facilitate two major security components defined in its abstract architecture. The efficiency of the two security schemes, focusing on the aspects of security and performance, is demonstrated and evaluation results are compared with the SNMPv3 standard.

Conventional network management protocols are insufficient especially in dealing with frequent security attacks. Our research has developed a Mobile Agent Security framework for Autonomic network Management (MASAM) which intends to address the above limitations. In this paper, we aim to evaluate the performance of the MASAM framework when dealing with security attack event management. The evaluation focuses on the traffic cost comparison between the new framework and SNMPv3. Event management traffic models are proposed and utilised to facilitate this evaluation. In order to validate the derived formulas, a corresponding set of simulation experiments have been conducted and the results are analysed. Positive evaluation results have been obtained from three focus points: the entire network, the manager and the managed device. We conclude that the MASAM framework reduces the amount of management traffic generated to respond to security attacks and also scales better than SNMP as a function of network size.

Research has proposed that next generation Mobile Agent (MA) technology will achieve the overall notion of “Zero Touch” network management. The advantages offered by using MA-based Network Manage-ment (MANM) include reduction in network traffic, intelligence, automation, fault-tolerance, and robustness. From our previous research, we have developed a security-focused MA framework (MASAM) for achieving active network management. This paper aims to examine the implication of network traffic load when implementing network security management by using MANM through four simulated security attack event cases. Evaluation results indicate that the MANM approach can enhance performance and security when dealing with various security attacks.