False Analog Data Injection Attack Towards Topology Errors: Formulation and Feasibility Analysis

In this paper, we propose a class of false analog data injection attack that can misguide the system as if topology errors had occurred. By utilizing the measurement redundancy with respect to the state variables, the adversary who knows the system configuration is shown to be capable of computing the corresponding measurement value with the intentionally misguided topology. The attack is designed such that the state as well as residue distribution after state estimation will converge to those in the system with a topology error. It is shown that the attack can be launched even if the attacker is constrained to some specific meters. The attack is detrimental to the system since manipulation of analog data will lead to a forged digital topology status, and the state after the error is identified and modified will be significantly biased with the intended wrong topology. The feasibility of the proposed attack is demonstrated with an IEEE 14-bus system.Comment: 5 pages, 7 figures, Proc. of 2018 IEEE Power and Energy Society General Meetin

EFFECTS OF SUPERVISORS' UPWARD EXCHANGE RELATIONSHIPS ON EMPLOYEES: TESTING MULTILEVEL MEDIATION ROLE OF EMPOWERMENT

This study empirically examined the proposition that supervisors' exchange relationships with their own supervisors (i.e., LLX) influence their subordinates' work related outcomes through three mechanisms: (1) motivating the team and its members, captured by team and individual empowerment, (2) providing leader-member relationship norms, and (3) facilitating the relationships between leader-member exchange (i.e., LMX) and individual outcomes. Analyses of multi-source and lagged data from 104 team supervisors and 577 subordinates showed that team and individual empowerment sequentially mediated the positive effect of LLX on subordinates' job satisfaction and job performance. Further, LMX mediated the positive effect of LLX on individual empowerment. It was also found that the indirect relationships of LMX with job satisfaction and job performance via individual empowerment were stronger when LLX was higher. Theoretical and practical implications of the findings were discussed