Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5876991
R. Fraga, Liu Sheng
Ship rudders are usually based on hydraulic systems as actuators, and the autopilots are based on PID controller because of the simplicity. But its performance in various environmental conditions is not as good as desired. These disadvantages can be decreased by using an electric motor as a flexible actuator to operate the rudder and apply the modern control theory to control the system. In this paper, two different control methods for the Permanent Magnet Synchronous Motor are presented to evaluate the rudder robustness against the disturbances. The main focus of the paper is on the presentation of fuzzy control utility in ship control.
{"title":"Non linear and intelligent controllers for the ship rudder control","authors":"R. Fraga, Liu Sheng","doi":"10.1109/SIECPC.2011.5876991","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876991","url":null,"abstract":"Ship rudders are usually based on hydraulic systems as actuators, and the autopilots are based on PID controller because of the simplicity. But its performance in various environmental conditions is not as good as desired. These disadvantages can be decreased by using an electric motor as a flexible actuator to operate the rudder and apply the modern control theory to control the system. In this paper, two different control methods for the Permanent Magnet Synchronous Motor are presented to evaluate the rudder robustness against the disturbances. The main focus of the paper is on the presentation of fuzzy control utility in ship control.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116287440","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}
Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5876910
K. Yousef, H. Jia, R. Pokharel, A. Allam, M. Ragab, K. Yoshida
This paper presents the design of a 2–16 GHz ultra wide band low noise amplifier (UWB LNA). The proposed LNA has a gain of 11.5 ± 0.85 dB with NF less than 2.82 dB. Good input and output impedance matching, good isolation and linearity are achieved over the operating frequency band. The proposed UWB LNA consumes 18.14 mW of power from 1.8V supply. This UWB LNA is designed and simulated in 0.18 μm CMOS process.
{"title":"A 2–16 GHz CMOS current reuse cascaded ultra-wideband low noise amplifier","authors":"K. Yousef, H. Jia, R. Pokharel, A. Allam, M. Ragab, K. Yoshida","doi":"10.1109/SIECPC.2011.5876910","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876910","url":null,"abstract":"This paper presents the design of a 2–16 GHz ultra wide band low noise amplifier (UWB LNA). The proposed LNA has a gain of 11.5 ± 0.85 dB with NF less than 2.82 dB. Good input and output impedance matching, good isolation and linearity are achieved over the operating frequency band. The proposed UWB LNA consumes 18.14 mW of power from 1.8V supply. This UWB LNA is designed and simulated in 0.18 μm CMOS process.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"48 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121761699","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}
Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5876927
M. AlSalhi, W. A. Farooq, M. R. Baig, A. H Al-Fareikh, S. S. Al-ghamdi
The effect of post-irradiation of CO2 laser at wavelength of 10.6μm, as a coherent source, on the alpha irradiated polyallydiglycol track recorder has been investigated to study the detector characteristics due to the corresponding morphology modifications. The average bulk etch rate and the mean diameter of alpha tracks are studied at several laser powers. In addition to this, absorption of the irradiated samples have also been investigated from 200nm to 600nm to observe the change in optical band-gap and it is concluded that the variation in the mean diameter of alpha tracks is probably linked to the variation in optical band-gap.
{"title":"CO2 laser induced micro structural variation in alpha-irradiated Polyallydigycol polymer","authors":"M. AlSalhi, W. A. Farooq, M. R. Baig, A. H Al-Fareikh, S. S. Al-ghamdi","doi":"10.1109/SIECPC.2011.5876927","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876927","url":null,"abstract":"The effect of post-irradiation of CO2 laser at wavelength of 10.6μm, as a coherent source, on the alpha irradiated polyallydiglycol track recorder has been investigated to study the detector characteristics due to the corresponding morphology modifications. The average bulk etch rate and the mean diameter of alpha tracks are studied at several laser powers. In addition to this, absorption of the irradiated samples have also been investigated from 200nm to 600nm to observe the change in optical band-gap and it is concluded that the variation in the mean diameter of alpha tracks is probably linked to the variation in optical band-gap.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130685930","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}
Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5876905
Mohamed Al-Ashrafy, A. Salem, W. Anis
In this paper we describe an efficient implementation of an IEEE 754 single precision floating point multiplier targeted for Xilinx Virtex-5 FPGA. VHDL is used to implement a technology-independent pipelined design. The multiplier implementation handles the overflow and underflow cases. Rounding is not implemented to give more precision when using the multiplier in a Multiply and Accumulate (MAC) unit. With latency of three clock cycles the design achieves 301 MFLOPs. The multiplier was verified against Xilinx floating point multiplier core.
{"title":"An efficient implementation of floating point multiplier","authors":"Mohamed Al-Ashrafy, A. Salem, W. Anis","doi":"10.1109/SIECPC.2011.5876905","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876905","url":null,"abstract":"In this paper we describe an efficient implementation of an IEEE 754 single precision floating point multiplier targeted for Xilinx Virtex-5 FPGA. VHDL is used to implement a technology-independent pipelined design. The multiplier implementation handles the overflow and underflow cases. Rounding is not implemented to give more precision when using the multiplier in a Multiply and Accumulate (MAC) unit. With latency of three clock cycles the design achieves 301 MFLOPs. The multiplier was verified against Xilinx floating point multiplier core.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131033942","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}
Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5876942
M. Z. Iqbal, N. Rikli
In this paper, a generic framework for dynamic bandwidth management of SDH resources is proposed in context of Unicast NGN service solutions. This avoids major up-gradation of existing network while obtaining maximum benefits from existing protocols and design practices. Mechanisms of traffic monitoring and hierarchical address allocation are also proposed.
{"title":"A generic framework for dynamic bandwidth management of SDH networks for Unicast NGN service solutions","authors":"M. Z. Iqbal, N. Rikli","doi":"10.1109/SIECPC.2011.5876942","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876942","url":null,"abstract":"In this paper, a generic framework for dynamic bandwidth management of SDH resources is proposed in context of Unicast NGN service solutions. This avoids major up-gradation of existing network while obtaining maximum benefits from existing protocols and design practices. Mechanisms of traffic monitoring and hierarchical address allocation are also proposed.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128917899","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}
Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5876953
O. Halimi, S. Addala, L. Bouhdjar, M. Sebais, M. Benguedouar
The properties of highly luminescent II-VI semiconductor nanoparticles have been extensively investigated to the application field. Generally the optical properties of crystals become extremely different with miniaturization of size [1]. Nanocrystals (NCs) are having an increasing importance due to their influence in different properties due to the quantum confinement stimulated by size decreasing [2]. Electron and phonon confinement is possible by II-VI NCs semiconductor when the size of particles tend to Bohr radius of the bulk crystal exciton showing new physical properties. These intriguing phenomena have been found new applications in telecommunication and Photonics [3]. Potassium dihydrogenophosphate KH2PO4 (KDP) has been recently used as a host matrix of ZnS semiconductor NCs as it is a transparent crystal in the UV-Visible region. KDP is a well known dielectric material for its nonlinear optical and electro-optical properties [4, 5] and well suited for frequency conversion [6]. In the present work, KH2PO4 (KDP) crystals doped with ZnS nanocrystals have been grown in aqueous solution supersaturated at 50°C using the lowering temperature method. X-ray diffraction spectra have shown that ZnS inclusions have been obtained with an average size of about 6.41 nm. The optical gap (Eg=4.01 eV) was deduced from the UV-Vis absorption spectra. The gap shift compared with ZnS bulk crystals (Eg=3.91 eV) could be due to the nanometric size of ZnS particles, revealing the intrinsic quantum confinement effect of these nanocrystals. Nevertheless, following experimental results from structural and optical characterisation the estimation of the ZnS particles size data shows a large dispersion, which must be taking into account. Furthermore, the possibility of embedding II-VI ZnS nanoparticles in KDP crystalline matrix has been proved and these materials present nanoparticles emitting light.
{"title":"Optical properties of ZnS nanocrystals/KH2PO4 dielectric crystal","authors":"O. Halimi, S. Addala, L. Bouhdjar, M. Sebais, M. Benguedouar","doi":"10.1109/SIECPC.2011.5876953","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876953","url":null,"abstract":"The properties of highly luminescent II-VI semiconductor nanoparticles have been extensively investigated to the application field. Generally the optical properties of crystals become extremely different with miniaturization of size [1]. Nanocrystals (NCs) are having an increasing importance due to their influence in different properties due to the quantum confinement stimulated by size decreasing [2]. Electron and phonon confinement is possible by II-VI NCs semiconductor when the size of particles tend to Bohr radius of the bulk crystal exciton showing new physical properties. These intriguing phenomena have been found new applications in telecommunication and Photonics [3]. Potassium dihydrogenophosphate KH2PO4 (KDP) has been recently used as a host matrix of ZnS semiconductor NCs as it is a transparent crystal in the UV-Visible region. KDP is a well known dielectric material for its nonlinear optical and electro-optical properties [4, 5] and well suited for frequency conversion [6]. In the present work, KH2PO4 (KDP) crystals doped with ZnS nanocrystals have been grown in aqueous solution supersaturated at 50°C using the lowering temperature method. X-ray diffraction spectra have shown that ZnS inclusions have been obtained with an average size of about 6.41 nm. The optical gap (Eg=4.01 eV) was deduced from the UV-Vis absorption spectra. The gap shift compared with ZnS bulk crystals (Eg=3.91 eV) could be due to the nanometric size of ZnS particles, revealing the intrinsic quantum confinement effect of these nanocrystals. Nevertheless, following experimental results from structural and optical characterisation the estimation of the ZnS particles size data shows a large dispersion, which must be taking into account. Furthermore, the possibility of embedding II-VI ZnS nanoparticles in KDP crystalline matrix has been proved and these materials present nanoparticles emitting light.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115391413","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}
Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5876900
M. Ubeid, M. Shabat, M. O. Sid-Ahmed
We investigate the characteristics of electromagnetic wave transmission by multilayered structures consisting of a pair of left-handed material (LHM) and dielectric slabs inserted between two semi-infinite dielectric media. The theoretical aspect is based on Maxwell's equations and matching the boundary conditions for the electric and magnetic fields of the incident waves at each layer interface. We calculate the reflected and transmitted powers of the multilayered structure taking into account the widths of the slabs and the frequency dependence of permittivity and permeability of the LHM. The obtained results satisfy the law of conservation of energy. We show that if the semi-infinite dielectric media have the same refractive index and the slabs have the same width, then the reflected power can be minimized and the transmittance-frequency curve shows no ripple. On the other hand if the semi-infinite dielectric media have different values of refractive indices and the slabs have different widths, then under certain conditions the reflected power can be maximized.
{"title":"Effect of negative permittivity and permeability in the transmission of electromagnetic waves through a left-handed material waveguide","authors":"M. Ubeid, M. Shabat, M. O. Sid-Ahmed","doi":"10.1109/SIECPC.2011.5876900","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876900","url":null,"abstract":"We investigate the characteristics of electromagnetic wave transmission by multilayered structures consisting of a pair of left-handed material (LHM) and dielectric slabs inserted between two semi-infinite dielectric media. The theoretical aspect is based on Maxwell's equations and matching the boundary conditions for the electric and magnetic fields of the incident waves at each layer interface. We calculate the reflected and transmitted powers of the multilayered structure taking into account the widths of the slabs and the frequency dependence of permittivity and permeability of the LHM. The obtained results satisfy the law of conservation of energy. We show that if the semi-infinite dielectric media have the same refractive index and the slabs have the same width, then the reflected power can be minimized and the transmittance-frequency curve shows no ripple. On the other hand if the semi-infinite dielectric media have different values of refractive indices and the slabs have different widths, then under certain conditions the reflected power can be maximized.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117044988","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}
Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5877000
Xu Huang, D. Sharma, M. Aseeri, S. Almorqi
Elliptic curve cryptosystem (ECC) was proposed by Miller [10] and Koblitz [9] which relies on the difficulty of elliptic curve discrete logarithmic problem (ECDLP). It is gaining wide acceptance as an alternative to the conventional public key cryptosystem such as RSA [24], DSA [25], DH [26]. The security of the WSN becomes one of the major concerns in its applications. It is well known that scalar multiplication operation in ECC accounts for about 80% of key calculation time on wireless sensor network motes. In this paper we present an optimized dynamic window based on our previous research works. The whole quality of service (QoS) has been improved under this algorism in particularly the power consuming is more efficiently. The simulation results showed that the average calculation time, due to fuzzy conditions decreased from previous 26 to current 9 as a whole the calculation time, decreased by approximately 18% in comparison to our previous algorithms in an ECC wireless sensor network [23].
{"title":"Secure wireless sensor networks with dynamic window for elliptic curve cryptography","authors":"Xu Huang, D. Sharma, M. Aseeri, S. Almorqi","doi":"10.1109/SIECPC.2011.5877000","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5877000","url":null,"abstract":"Elliptic curve cryptosystem (ECC) was proposed by Miller [10] and Koblitz [9] which relies on the difficulty of elliptic curve discrete logarithmic problem (ECDLP). It is gaining wide acceptance as an alternative to the conventional public key cryptosystem such as RSA [24], DSA [25], DH [26]. The security of the WSN becomes one of the major concerns in its applications. It is well known that scalar multiplication operation in ECC accounts for about 80% of key calculation time on wireless sensor network motes. In this paper we present an optimized dynamic window based on our previous research works. The whole quality of service (QoS) has been improved under this algorism in particularly the power consuming is more efficiently. The simulation results showed that the average calculation time, due to fuzzy conditions decreased from previous 26 to current 9 as a whole the calculation time, decreased by approximately 18% in comparison to our previous algorithms in an ECC wireless sensor network [23].","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117343760","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}
Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5876929
M. Anis, Z. Saeed
This paper presents the wireless network architecture to provide multilingual speech translation and local positioning system during Hajj operations. The pilgrims require low power, low cost and compact ear connected devices to receive the information in their native language. The proposed RF transceiver front-end design consists of multiple numbers of oscillators tuned within spectrum of 5-to-8.5GHz. In transmitting mode, oscillators are periodically turned on and off for short period of time to generate UWB impulses. In receiving mode, oscillators are operated in super-regenerative configuration to detect multi-channel narrowband OOK modulated data bits.
{"title":"Wireless network architecture and RF transceiver front-end to provide multilingual speech translation and local positioning system for Hajj operations","authors":"M. Anis, Z. Saeed","doi":"10.1109/SIECPC.2011.5876929","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876929","url":null,"abstract":"This paper presents the wireless network architecture to provide multilingual speech translation and local positioning system during Hajj operations. The pilgrims require low power, low cost and compact ear connected devices to receive the information in their native language. The proposed RF transceiver front-end design consists of multiple numbers of oscillators tuned within spectrum of 5-to-8.5GHz. In transmitting mode, oscillators are periodically turned on and off for short period of time to generate UWB impulses. In receiving mode, oscillators are operated in super-regenerative configuration to detect multi-channel narrowband OOK modulated data bits.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"24 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120872020","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}
Pub Date : 2011-04-24DOI: 10.1109/SIECPC.2011.5876937
A. Mudau, C. Willers, Derek Griffith, Francois P. J. le Roux
To fully exploit the potential of current generation infrared focal plane arrays, it is crucial to correct for the fixed pattern noise. This paper presents two-point non-uniformity corrections (NUC) applied to infrared images acquired with long wave and medium wave infrared cameras. Pixels that are not corrected by the NUC process, defined as bad pixels, were identified and replaced using a nearest neighbor algorithm.
{"title":"Non-uniformity correction and bad pixel replacement on LWIR and MWIR images","authors":"A. Mudau, C. Willers, Derek Griffith, Francois P. J. le Roux","doi":"10.1109/SIECPC.2011.5876937","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876937","url":null,"abstract":"To fully exploit the potential of current generation infrared focal plane arrays, it is crucial to correct for the fixed pattern noise. This paper presents two-point non-uniformity corrections (NUC) applied to infrared images acquired with long wave and medium wave infrared cameras. Pixels that are not corrected by the NUC process, defined as bad pixels, were identified and replaced using a nearest neighbor algorithm.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128262544","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}
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