Mustafa Özdemir

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An M/MMGI/1/K queuing model is developed for the analysis of IEEE 802.11 DCF using RTS/CTS. Results are based on arbitrary contention conditions, namely, collision probabilities, transmission probabilities and contention window sizes vary arbitrarily among nodes contending for channel access. This is fundamentally different from earlier work. Results are(More)
In this paper, two Markov chain queuing models have been developed to obtain closed-form solutions for packet delay and packet throughput distributions in a real-time wireless communication environment using IEEE 802.11 DCF. An M/G/1/K queuing model is incorporated in both models. In the first model results are based on arbitrary contention conditions,(More)
Mutations in HPGD have recently been reported to cause primary hypertrophic osteoarthropathy (PHO), a rare genetic disease characterized by digital clubbing, pachydermia, and periostosis. We screened HPGD mutations in six patients from three unrelated Turkish families with PHO, in which we showed one previously reported, p.A140P, and one novel, p.M1L,(More)
BACKGROUND/OBJECTIVES Alopecia areata (AA) is one of the most difficult skin diseases to manage well. In children, anthralin is commonly used for the treatment of AA. Available research consists of a limited number of uncontrolled trials that assessed the effectiveness of anthralin in promoting hair growth in patients with AA. The objective of this study(More)
Therefore, we conclude that the following parameters were he independent predictors of the favorable surgical outcomes in ur study: (1) age at presentation; (2) pontine location of cavrnous malformation; and (3) favorable pre-operative mRS. Also, he locationof cavernousmalformationandpreoperativemRSwere ssociated with favorable long-term outcomes. However,(More)
Hidden nodes are a basic problem that can potentially influence any multi-hop wireless networks where nodes cannot hear each other. Even though the hidden node problem is well known, its effects have not been quantified so well in a comprehensive manner up to now. This paper presents a novel framework for the queuing analysis towards getting a quantitative(More)
A 42-year-old-man presented with generalized inflammatory linear verrucous epidermal nevus with concomitant psoriasis vulgaris. Because of unresponsiveness of the conventional treatment, we considered treatment with adalimumab. Adalimumab was well tolerated and no side effects were observed. Adalimumab has a limited effect in treating ILVEN lesions.(More)