{"title":"An investigation of the effects of doping and thickness on the electrical characteristics of polycrystalline silicon nanowire biosensors","authors":"Laila-Parvin Poly, Md. Asrarul Haque, M. Hakim","doi":"10.1109/ICECE.2016.7853893","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853893","url":null,"abstract":"We study for the first time the effect of nanowire thicknesses and doping concentrations on the electrical characteristics of polycrystalline silicon nanowires to find out the proper combination of nanowire thickness and doping for sensitive operation of polycrystalline silicon nanowire biosensors. For nanowire thicknesses of 100 nm and 75 nm, a plausible subthreshold slope around 100 mV/dec for a viable biosensor operation can only be achieved if doping concentration is 2×1016/cm3 or below. For a 50 nm nanowire thickness a relatively wide doping concentration range can be chosen for biosensor design while maintaining decent sub-threshold characteristics. In this thickness a doping up to 4×1017/cm3 with a sub-threshold slope around 100 mV/dec can be chosen. The widest range of doping concentrations can be chosen for 25 nm and 10 nm nanowire thicknesses with a maximum doping up to 1018/cm3 while maintaining a promising sub-threshold slope around 95 mV/dec for a viable biosesnsor design using polycrystalline silicon nanowires. As such this research reveals the possible combinations of nanowire thickness and doping to ensure the sensitive operation of polycrystalline silicon nanowire biosensors.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133154840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Detection of torsional oscillations in line-start IPM motor drives using motor current signature analysis","authors":"S. Rabbi, M. Rahman","doi":"10.1109/ICECE.2016.7853865","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853865","url":null,"abstract":"Line-start interior permanent magnet (LSIPM) motors are vulnerable to limit cycles and often experience severe torsional oscillations. This paper presents a technique for detection of torsional oscillations in LSIPM motors based on stator current signatures. Rotor speed variations associated with torsional oscillations in a LSIPM motor influences the electrical supply, and introduces variable amplitude lower and upper sidebands in the stator current. In this paper, frequency domain analysis of the nonstationary current signals is carried out for detection of the sideband frequency components superimposed on the fundamental. The proposed technique is validated by performing finite element analysis (FEA) of a 3-phase 4-pole 1HP LSIPM motor drive. Experimental investigations have been carried out for the same motor drive in order to validate the performance of the proposed method under various practical operating conditions. Based on FEA and experimental results, the proposed technique can successfully detect the onset of torsional oscillations in the drive system without any vibration sensor.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115095025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Rana, M. S. Islam, J. Sultana, K. Reza, M. A. Uddin, M. Faisal, M. Islam, R. Islam
{"title":"A highly birefringent slotted-core THz fiber","authors":"S. Rana, M. S. Islam, J. Sultana, K. Reza, M. A. Uddin, M. Faisal, M. Islam, R. Islam","doi":"10.1109/ICECE.2016.7853897","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853897","url":null,"abstract":"We present a slotted porous-core microstructure polymer fiber for polarization maintaining (PM) guidance of terahertz (THz) waves. The numerical analysis is performed using a full vector finite element method (FEM). Our proposed structure contains a compact hexagonal lattice in the cladding and rectangular slotted air-holes inside the core. Geometries inside the core have been designed to introduce asymmetry which results in a high modal birefringence of ∼0.08. Moreover, majority of the mode power is propagated in air medium to exhibit a very low effective material loss of ∼0.08 cm−1. Some other modal characteristics of the fiber are also discussed rigorously, which include confinement loss, mode power fraction, dispersion properties etc.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"19 25-26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116707122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Impact of scaling channel length on the performances of nanoscale FETs","authors":"J. K. Saha, N. Chakma, M. Hasan","doi":"10.1109/ICECE.2016.7853871","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853871","url":null,"abstract":"The investigation of short-channel effects (SCE) due to channel length reduction for four different types of n-channel FETs: Bulk MOSFET, SOI MOSFET, DG MOSFET and CNTFET are carried out in this work. Simulators are used to investigate SCEs like threshold voltage (V<inf>th</inf>) roll-off, subthreshold Swing (SS) and I<inf>on</inf>/I<inf>off</inf> ratio. Our study shows that DG MOSFET, SOI MOSFET and Bulk MOSFET reach their scalable limit at 30 nm, 50 nm and 100 nm channel length respectively due to elevation of leakage power consumption as they exhibit rapid degradation of V<inf>th</inf>, SS beyond 100mV/decade and less I<inf>on</inf>/I<inf>off</inf> ratio. On the contrary, CNTFET can be scaled down below 10 nm as it shows negligible SCEs with stable V<inf>th</inf>, ideal SS (60mV/decade) and high I<inf>on</inf>/I<inf>off</inf> ratio as channel length decreases. Our numerical analysis shows CNTFET creates only 1.11% V<inf>th</inf> variation whereas DG MOSFET creates 39.33% V<inf>th</inf> variation. CNTFETs advantages over MOSFET make it viable for faster and enhanced applications in nanoelectronics.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116959793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Self-consistent determination of quantum-mechanical threshold voltage of Gate-All-Around Junction Less Nanowire Transistor","authors":"Nujhat Tasneem, M. Adnan, M. Hafiz, Q. Khosru","doi":"10.1109/ICECE.2016.7853874","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853874","url":null,"abstract":"Quantum definition based threshold voltage calculation of Gate-All-Around Junction Less Nanowire Transistor has been presented in this work. Employment of this approach has not yet been achieved on GAA-JLNT even though similar determination was previously established for TG FinFETs and GAA-MOSFETs in recent literature. The self-consistent solver, which takes wave function penetration and other quantum mechanical (QM) effects into account, has been utilized here to establish the Capacitance-Voltage characteristics, using which the threshold voltage has been calculated. Effect of silicon channel thickness on threshold has been studied and a modification of classical analytical formula is proposed based on a fitting parameter, using the extracted threshold voltages.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123255392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Traffic modelling of low dense femtocellular network","authors":"Jesmin Akhter, M. Islam, M. Amin","doi":"10.1109/ICECE.2016.7853859","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853859","url":null,"abstract":"The prime objective of LTE (Long-term evolution) mobile cellular network is to ensure high speed data with good QoS. In LTE femtocellular network the tiny femtocell are integrated with macrocell to transfer overflow traffic (off loading) from macrocell to femtocell. A dense femtocellular network experiences frequent handover and huge interferences. Therefore in traffic modelling two parameters: the availability of traffic channel and threshold SNR (signal to noise ratio) at receiving end need to be considered together. In this paper a complete analytical model of traffic of low dense femtocellular network is developed using two dimensional Markov chain. Finally received SNR of UE (user equipment) is incorporated with the probability states of network traffic and the analytical results are verified with simulation.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121595652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Md. Abu Bakar Siddik, Shafika Showkat Moni, M. S. Alam
{"title":"An efficient MAC protocol for provisioning fairness in vehicle to roadside communications","authors":"Md. Abu Bakar Siddik, Shafika Showkat Moni, M. S. Alam","doi":"10.1109/ICECE.2016.7853960","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853960","url":null,"abstract":"In this paper, we present an efficient medium access control (MAC) protocol based on IEEE 802.11 DCF, which minimizes the unfairness problem of two way vehicle ad hoc networks. Geographically highly dynamic topology in vehicle ad hoc networks lead to unfairness problem. Unfairness problem has two aspects: higher velocity vehicles cannot transmit a minimum number of packets and lower velocity vehicles cannot transmit above a minimum number of packets. To address the above mentioned issues, our proposed scheme adjusts the transmission probability for each vehicle according to its residence time by changing the value of MAC parameters dynamically. An analytical model is developed to analyze the performance of the proposed protocol in a non-saturated state. We derive the relationship between the transmission probability and the residence time. Furthermore, relation between the transmission probability and the minimum contention window size of a vehicle is also derived to correlated residence time with minimum contention window size. Analytical results show that our proposed scheme overcomes the limitations of existing MAC protocols by ensuring that packet transmission rate remains proportional to the residence time of the vehicles.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122033776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fast real and reactive power flow control of grid-tie Photovoltaic inverter","authors":"R. Sadnan, M. R. Khan","doi":"10.1109/ICECE.2016.7853984","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853984","url":null,"abstract":"A fast power flow control algorithm for a grid tie Photovoltaic inverter is presented here. The proposed method has the merits of design simplicity. The algorithm is fast and has the virtue of quick response to the change of required power output for the PV inverter. Current mode asynchronous sigma delta modulation is implemented to ease the controlled sensitivity to the grid current distortion. This process also opens a window to reduce the harmonics in the current. The simulation is performed in MATLAB/Simulink. A comparison is provided to observe the response behaviour of the algorithm.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128231003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jaya Roy, Md. Abu Bakar Siddik, Shafika Showkat Moni, M. S. Alam
{"title":"An efficient cooperative MAC protocol for enhancing QoS of IEEE 802.11e EDCA in saturated conditions","authors":"Jaya Roy, Md. Abu Bakar Siddik, Shafika Showkat Moni, M. S. Alam","doi":"10.1109/ICECE.2016.7853986","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853986","url":null,"abstract":"Differentiating channel access probability based on only traffic priority can ensure QoS statistically in enhanced distributed channel access (EDCA) of IEEE 802.11e. However, it may seriously affect the overall performance in presence of degraded channel condition among distant stations. In this paper, we propose a novel channel access scheme which exploits the benefit of cooperative communication in order to mitigate the adverse effect of bad channel condition while maintaining deterministically prioritized channel access for high priority traffic. Unlike EDCA, in our proposed scheme whenever a station with degraded channel condition wins the channel contention, our scheme searches for a prospective helper node to assist the sender in transmission. Eventually by exchanging sequence of busy tones and a special frame, it selects an optimal helper which has data with equal or higher priority as well as supports significantly higher data rate for cooperative transmission. Simulation results demonstrate that our proposed protocol enhances the QoS of the network while improving the overall performance of EDCA.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131185411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Microstrip planar antenna for wideband wireless communication with defected ground structure","authors":"R. Azim, M. Islam","doi":"10.1109/ICECE.2016.7853975","DOIUrl":"https://doi.org/10.1109/ICECE.2016.7853975","url":null,"abstract":"In this article a microstrip antenna is reported for wideband wireless communication application. The main radiator of this design is printed in the front side of a piece of FR4 dielectric substrate while a finite ground plane is etched on the rear side. To achieve wide operating band, the ground plane is reduced to partial one and defected by inserting slots on its upper edge. It is found that this modification established a proper coupling between ground structure and the radiator, and the investigated antenna attained a measured fractional bandwidth of 130%. Furthermore, the proposed antenna demonstrates omnidirectional radiation characteristics with good gain and efficiency.","PeriodicalId":122930,"journal":{"name":"2016 9th International Conference on Electrical and Computer Engineering (ICECE)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115953495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}