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Distributed arbitration scheme for on-chip CDMA bus with dynamic codeword assignment
Nikolic, Tatjana R.,Nikolic, Goran S.,Djordjevic, Goran Lj. Electronics and Telecommunications Research Instit 2021 ETRI Journal Vol.43 No.3
Several code-division multiple access (CDMA)-based interconnect schemes have been recently proposed as alternatives to the conventional time-division multiplexing bus in multicore systems-on-chip. CDMA systems with a dynamic assignment of spreading codewords are particularly attractive because of their potential for higher bandwidth efficiency compared with the systems in which the codewords are statically assigned to processing elements. In this paper, we propose a novel distributed arbitration scheme for dynamic CDMA-bus-based systems, which solves the complexity and scalability issues associated with commonly used centralized arbitration schemes. The proposed arbitration unit is decomposed into multiple simple arbitration elements, which are connected in a ring. The arbitration ring implements a token-passing algorithm, which both resolves destination conflicts and assigns the codewords to processing elements. Simulation results show that the throughput reduction in an optimally configured dynamic CDMA bus due to arbitration-related overheads does not exceed 5%.
Influence of ductility classes on seismic response of reinforced concrete structures
Nikolic, Zeljana,Zivaljica, Nikolina,Smoljanovic, Hrvoje Techno-Press 2018 Coupled systems mechanics Vol.7 No.2
Reinforced concrete buildings in a seismically active area can be designed as DCM (medium ductility) or DCH (high ductility) class according to the regulations of Eurocode 8. In this paper, two RC buildings, one with a wall structural system and the other with a frame system, previously designed for DCM and DCH ductility, were analysed by using incremental dynamic analysis in order to study differences in the behaviour of structures between these ductility classes, especially the failure mechanism and ultimate collapse acceleration. Despite the fact that a higher behaviour factor of DCH structures influences lower seismic resistance, in comparison to DCM structures, a strict application of the design and detailing rules of Eurocode 8 in analysed examples caused that the seismic resistance of both frames does not significantly differ. The conclusions were derived for two buildings and do not necessarily apply to other RC structures. Further analysis could make a valuable contribution to the analysis of the behaviour of such buildings and decide between two ductility classes in everyday building design.
The Coexistence of Myasthenia Gravis and Myotonic Dystrophy Type 2 in a Single Patient
Ana Nikolic,Vidosava Rakocevic Stojanovic,Stanka Romac,Dusanka Savic,Ivana Basta,Dragana Lavrnic 대한신경과학회 2013 Journal of Clinical Neurology Vol.9 No.2
Background Myasthenia gravis (MG) and myotonic dystrophy type 2 (DM2) are rare disorders individually, and their coexistence in the same patient is very rare. We present a patient in which these two diseases coexisted. Case Report The patient complained of diplopia, fluctuating limb weakness, and difficulties in swallowing and speaking. A neurological examination revealed diplopia, facial, weakness of the neck and proximal limb muscles, dysphagia, dysphonia, and myotonia. The patient’s mother had DM2 and her maternal grandfather had cataracts. MG was confirmed in our patient by positive results for neostigmine and a repetitive nerve stimulation test, and elevated serum antiacetylcholine-receptor antibodies, while DM2 was confirmed by electromyography and genetic testing. The patient improved remarkably after treatment with anticholinesterases, corticosteroids, and azathioprine. Conclusions This is the second reported case of the coexistence of DM2 and MG in the same patient. Since the symptoms of these two diseases overlap it is very important to keep in mind the possibility of their coexistence, so that MG is not overlooked in patients with a family history of myotonic dystrophy.
Ljiljana Nikolic-Bujanovic,Milan Cekerevac,Mirjana Vojinovic-Miloradov,Anja Jokic,Milos Simicica 한국공업화학회 2012 Journal of Industrial and Engineering Chemistry Vol.18 No.6
The influence of anode composition and temperature on the anode electrochemical activity and subsequent ferrate(VI) production in 10 M NaOH solution has been studied. Results obtained from the pure iron, gray and white cast iron were compared to establish the most promising anode in terms of ferrate production efficiency. The cyclic voltammetry measurements associated with the potentiodynamic polarization results induce that the pure iron has the lowest electrochemical activity. Presence of silicon in outer layer was confirmed by X-ray diffraction of reaction products on WCI and GCI in the form of iron(II)iron(III) silicon oxide–hydroxide.
Bojana Z. Nikolic,Mihajlo C. Stefanovic,Stefan R. Panic,Jelena A. Anastasov,Borivoje Milosevic 한국전자통신연구원 2011 ETRI Journal Vol.33 No.3
This paper considers the effects of simultaneous correlated multipath fading and shadowing on the performances of a signal-to-interference ratio (SIR)-based dual-branch selection combining (SC) diversity receiver. This analysis includes the presence of cochannel interference. A generalized fading/shadowing channel model in an interference-limited correlated fading environment is modeled by generalized-K distribution. Closed-form expressions are obtained for probability density function and cumulative distribution function of the SC output SIR, as well as for the outage probability. Based on this, the influence of various fading and shadowing parameter values and the correlation level on the outage probability is examined.