Hussein Aslan - Academia.edu (original) (raw)
Uploads
Papers by Hussein Aslan
Journal of Thoracic …, 2011
Stress-induced cardiomyopathy, known as Takotsubo, is an increasingly recognized syndrome, charac... more Stress-induced cardiomyopathy, known as Takotsubo, is an increasingly recognized syndrome, characterized by transient apical or midventricular dysfunction, which mimics myocardial infarction in the absence of significant coronary artery disease, and is thought to be due to transient catecholamine overload. Multidetector computed tomography (MDCT) is a novel imaging approach increasingly recognized as a rapid, noninvasive diagnostic modality to assess coronary anatomy and cardiac function. Few reports have been published regarding its utility in the assessment of myocardial viability after myocardial infarction. We describe 2 patients with Takotsubo cardiomyopathy who underwent MDCT imaging. To our knowledge, this is the first report describing the utility of MDCT that shows the absence of delayed hyperenhancement in patients with Takotsubo cardiomyopathy.
Computers & Security, 2004
In the present paper, a scalable protocol for securing multicast communication is proposed. The p... more In the present paper, a scalable protocol for securing multicast communication is proposed. The proposed protocol is based on the idea of dividing the whole group into smaller subgroups as in the Iolus protocol. For a member join or leave, the decomposition of the group into smaller subgroups will reduce the computation complexity from O(M), where M is the number of the whole group members, to O(N), where N is the number of the subgroup members. Moreover, each subgroup is organized in a logical key hierarchy as in the LKH protocol. The use of logical key hierarchy will reduce the computation complexity cost from O(N) to OðlogðNÞÞ in case of member leave/join. Furthermore, the number of communicating messages containing the changed keys will be reduced. The proposed protocol is compared with the two well-known protocols: Iolus and LKH. The comparison is undertaken according to two criteria: the cost of encryption required for the rekey operation in case of member join or leave and the length of the re-key message. The results show that the proposed protocol outperforms both the Iolus and the LKH protocols. Therefore, the proposed protocol will enhance the group performance in terms of computation and communication. ª
Journal of Thoracic …, 2011
Stress-induced cardiomyopathy, known as Takotsubo, is an increasingly recognized syndrome, charac... more Stress-induced cardiomyopathy, known as Takotsubo, is an increasingly recognized syndrome, characterized by transient apical or midventricular dysfunction, which mimics myocardial infarction in the absence of significant coronary artery disease, and is thought to be due to transient catecholamine overload. Multidetector computed tomography (MDCT) is a novel imaging approach increasingly recognized as a rapid, noninvasive diagnostic modality to assess coronary anatomy and cardiac function. Few reports have been published regarding its utility in the assessment of myocardial viability after myocardial infarction. We describe 2 patients with Takotsubo cardiomyopathy who underwent MDCT imaging. To our knowledge, this is the first report describing the utility of MDCT that shows the absence of delayed hyperenhancement in patients with Takotsubo cardiomyopathy.
Computers & Security, 2004
In the present paper, a scalable protocol for securing multicast communication is proposed. The p... more In the present paper, a scalable protocol for securing multicast communication is proposed. The proposed protocol is based on the idea of dividing the whole group into smaller subgroups as in the Iolus protocol. For a member join or leave, the decomposition of the group into smaller subgroups will reduce the computation complexity from O(M), where M is the number of the whole group members, to O(N), where N is the number of the subgroup members. Moreover, each subgroup is organized in a logical key hierarchy as in the LKH protocol. The use of logical key hierarchy will reduce the computation complexity cost from O(N) to OðlogðNÞÞ in case of member leave/join. Furthermore, the number of communicating messages containing the changed keys will be reduced. The proposed protocol is compared with the two well-known protocols: Iolus and LKH. The comparison is undertaken according to two criteria: the cost of encryption required for the rekey operation in case of member join or leave and the length of the re-key message. The results show that the proposed protocol outperforms both the Iolus and the LKH protocols. Therefore, the proposed protocol will enhance the group performance in terms of computation and communication. ª