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Structural and electrical properties of Zinc sulfide nanoparticles 硫化锌纳米颗粒的结构和电学性质
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5876907
M. Ahmad, K. Rasool, Z. Imran, M. Rafiq, M. Hasan
{"title":"Structural and electrical properties of Zinc sulfide nanoparticles","authors":"M. Ahmad, K. Rasool, Z. Imran, M. Rafiq, M. Hasan","doi":"10.1109/SIECPC.2011.5876907","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876907","url":null,"abstract":"Zinc sulfide (ZnS) nanoparticles were synthesized using chemical co-precipitation method. The structural and morphological properties of these particles were studied by X-ray diffraction (XRD) and Scanning electron microscopy (SEM). The crystallite sizes calculated from XRD patterns were 2.8nm and 29nm of as prepared sphalerite and annealed wurtzite ZnS particles respectively. UV-visible absorption spectroscopy was used to calculate absorption edges which were found at 211nm for as prepared and 262 nm for annealed ZnS nanoparticles. These absorption edges were shifted towards lower wavelengths compared to bulk ZnS (337nm). The impedance analysis showed that electrical resistance of annealed sample is decreased as compared to as prepared sample.","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":"130413223","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}
引用次数: 2
Determining suitable wavelet filters for visual sensor networks 确定适合视觉传感器网络的小波滤波器
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5876951
Brahim Hadjou, A. Mammeri, A. Khoumsi
{"title":"Determining suitable wavelet filters for visual sensor networks","authors":"Brahim Hadjou, A. Mammeri, A. Khoumsi","doi":"10.1109/SIECPC.2011.5876951","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876951","url":null,"abstract":"Visual sensor networks (VSN) require strict constraints on energy consumption. So, low power wavelet-based coder (WBC) is becoming crucial in VSN design. This makes more difficult the determination of appropriate wavelets. An appropriate wavelet is a wavelet that consumes few energy during image processing while permitting an acceptable quality of the reconstructed image at the reception. In this paper, we make a comparative study between DWT transforms because DWT has several advantages. We consider two known ways of implementing DWT: the classical convolutional-based wavelets and the relatively new lifting-based wavelets.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"17 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":"133859066","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}
引用次数: 4
Design of energy efficient low power PV refrigeration system 节能低功率光伏制冷系统的设计
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5876933
A. Fatehmulla, Abdullah S. Alshammari, A. Al-Dhafiri, A. Al-Bassam
{"title":"Design of energy efficient low power PV refrigeration system","authors":"A. Fatehmulla, Abdullah S. Alshammari, A. Al-Dhafiri, A. Al-Bassam","doi":"10.1109/SIECPC.2011.5876933","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876933","url":null,"abstract":"Stand-alone PV systems have shown to be reliable and cost effective for cooling & refrigeration and have attracted the users. For a specific application with an estimated requirement of cooling, low power refrigeration system using PV modules (2 modules each of 36 solar cells) has been designed, fabricated and developed. In this paper, results of the I-V characteristics for the solar panels used have been presented and discussed. Charging and discharging processes for the battery including the voltage as a function of specific gravity and time have been carried out. All the results are significantly encouraging and hence test results of our system using the charge controller and DC powered refrigerator are presented. The paper also deals with our experiences encountered including the successful operation of the refrigeration system during off the sunshine hours continuously for 6 hours. The calculations of the specific cooling costs show the promising economic effectiveness and reliability of the designed PV refrigeration system. Keeping in view of the technical performance and economic parameter, it demonstrates that this small-scale technology can contribute to solving problems of cooling like small area refrigeration including the transportable and small cold storage container with integrated PV energy supply systems. These systems can be erected on or around a vehicle to obtain the cooling needs while on drives including picnics or especially in remote desert areas.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"329 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":"132099072","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}
引用次数: 7
Fluence and photobleaching effects of mTHPC mTHPC的通量和光漂白效果
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5877007
M. Atif
{"title":"Fluence and photobleaching effects of mTHPC","authors":"M. Atif","doi":"10.1109/SIECPC.2011.5877007","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5877007","url":null,"abstract":"The current study relates to the response of mTHPC to exposure using femtosecond duration laser pulses. Experiments using a Ti: sapphire laser delivering ∼130 fs pulses at a wavelength of ∼ 800 nm show that fluorescence can be excited in this photosensitiser, even though the photon energy is less than the energy of the fluorescing state. The fluorescence amplitude is found to exhibit an irradiance dependence of the form In where n ≈ 2, which is consistent with two-photon excitation. Also the effect of photobleaching was studied using one and two photon excitation.","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":"129549161","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}
引用次数: 0
Building energy efficient LR-PON for desert terrain of Saudi Arabia 沙特阿拉伯沙漠地形建筑节能LR-PON
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5876915
Mohammad Siraj, A. Fatehmulla, S. Alshebeili, K. A. Bakar
{"title":"Building energy efficient LR-PON for desert terrain of Saudi Arabia","authors":"Mohammad Siraj, A. Fatehmulla, S. Alshebeili, K. A. Bakar","doi":"10.1109/SIECPC.2011.5876915","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876915","url":null,"abstract":"With the increase of bandwidth demands, an increasing concern prevails among researchers towards energy consumption in next generation access networks. Attempts have been made by researchers with an overview of techniques and architectures for energy consumption minimization in core networks. Growing concern equally exists essentially to reduce Green House Gases (GHG) emissions from computers and network equipments. In the present paper, we focus on renewable energy utilization at access level as well with a view to build energy efficient long range passive optical networks (LR-PON) for desert terrain of Saudi Arabia. In this paper we have presented LR-PON model between Riyadh and Al-Kharj with an admission control algorithm for efficient performance of LR-PON. Also, in this paper we have shown how to reduce network complexities and provide a cost effective solution by greening the network at the access level by using solar energy which is renewable and clean.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"69 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":"114227740","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}
引用次数: 0
Electrospun TiO2 nanorods assembly sensitized by mercaptosuccinic acid-capped CdS quantum dots for solar cells: Subtitle as needed (paper subtitle) 太阳能电池用巯基琥珀酸覆盖CdS量子点致敏的电纺丝TiO2纳米棒组件:根据需要提供副标题(论文副标题)
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5876947
A. S. Nair, Yang Shengyuan, Zhu Peining, E. N. Kumar, P. Archana, V. J. Babu, S. Ramakrishna
{"title":"Electrospun TiO2 nanorods assembly sensitized by mercaptosuccinic acid-capped CdS quantum dots for solar cells: Subtitle as needed (paper subtitle)","authors":"A. S. Nair, Yang Shengyuan, Zhu Peining, E. N. Kumar, P. Archana, V. J. Babu, S. Ramakrishna","doi":"10.1109/SIECPC.2011.5876947","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876947","url":null,"abstract":"CdS quantum dots (QDs) capped with mercaptosuccinic acid (MSA) as the surface passivating ligand were anchored to electrospun TiO2 nanorod surfaces using the terminal carboxylic acid groups present on MSA. The as-synthesized materials and the dye-sensitized solar cells were characterized by spectroscopy, microscopy and photocurrent measurements, respectively. Best solar cells fabricated by the method showed an efficiency of 0.07%. We believe that the simple, one-pot fabrication of the QDs and their assembly into solar cells are significant steps in QD-sensitized solar cell research.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"94 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":"127069997","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}
引用次数: 0
New erbium doped fiber laser amplifier 新型掺铒光纤激光放大器
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5876981
B. Bouzid
{"title":"New erbium doped fiber laser amplifier","authors":"B. Bouzid","doi":"10.1109/SIECPC.2011.5876981","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876981","url":null,"abstract":"A new configuration of laser and amplifier is constructed and investigated. This configuration is called erbium doped fiber laser amplifier (EDFLA) where both the laser and amplifier are included in one configuration. The new configuration is utilized as optical amplifier, laser source, and ON/OFF optical tool. A surprising characteristic of the configuration is remarked when the lasing is ON the absorption and amplification are abolished.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"33 5 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":"126070779","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}
引用次数: 1
PID controllers design for a power plant using Bacteria Foraging Algorithm 基于细菌觅食算法的电厂PID控制器设计
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5876917
A. Bensenouci
{"title":"PID controllers design for a power plant using Bacteria Foraging Algorithm","authors":"A. Bensenouci","doi":"10.1109/SIECPC.2011.5876917","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876917","url":null,"abstract":"This paper provides the design for two PID controllers, one for the terminal voltage and the other for the electric power. Both controllers are designed to control a sample power system that comprises a synchronous generator connected to a large network via a step-up transformer and a transmission line. The generator is equipped with two decoupled control-loops, namely, the speed/power (governor) and voltage (exciter) controllers. The gains setting of both PIDs are found using Bacteria Forging Algorithm (BFA). PID is considered because of its robustness, simple structure and easy implementation. It is also preferred in plants of higher order that cannot be reduced to lower ones. To show the effectiveness of the design, divers tests, namely, step/tracking in the control variables, and variation in plant parameters, are applied. From the simulation, the results are very encouraging to pursue further this trend.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"21 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":"130194026","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}
引用次数: 11
Highly reliable analog filter design using analog voting 采用模拟投票的高可靠模拟滤波器设计
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5876954
S. Askari, M. Nourani
{"title":"Highly reliable analog filter design using analog voting","authors":"S. Askari, M. Nourani","doi":"10.1109/SIECPC.2011.5876954","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876954","url":null,"abstract":"N-Modular Redundancy (NMR) is the most commonly used failure mitigation technique, in which a voting unit is used to vote out the wrong path/data. The voter is, therefore, vital for nanoscale analog and digital circuits in which high defect rate is expected. In this paper, we propose a redundancy based fault-tolerant methodology to design fault tolerant analog filters. The key contribution of our work is an innovative mean voter which is very fast, inexpensive and linearly scalable with respect to the redundancy factor. For the proof of concept, we designed a 4th order high frequency Gm-C filter and a 5th order Opamp-RC filter and reported the circuits reliability.","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":"116116129","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}
引用次数: 4
Morphological dependance of charge transport in nanostructured ZnO-based dye sensitized solar cells 纳米zno基染料敏化太阳能电池中电荷输运的形态依赖性
2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC) Pub Date : 2011-04-24 DOI: 10.1109/SIECPC.2011.5876997
N. Elumalai, Mein Jin Tan, Jia Xing Lee, S. Dolmanan, Karen Ke Lin, Liu Bin, A. Nair, Vijila Chellappan, S. Ramakrishna
{"title":"Morphological dependance of charge transport in nanostructured ZnO-based dye sensitized solar cells","authors":"N. Elumalai, Mein Jin Tan, Jia Xing Lee, S. Dolmanan, Karen Ke Lin, Liu Bin, A. Nair, Vijila Chellappan, S. Ramakrishna","doi":"10.1109/SIECPC.2011.5876997","DOIUrl":"https://doi.org/10.1109/SIECPC.2011.5876997","url":null,"abstract":"Zinc oxide (ZnO) photoanodes of two different morphologies — nanorods and nanosheets are used to fabricate dye sensitised solar cells in order to study the influence of morphology on device performance. Characteristics such as dye loading capacity and light scattering ability of the photoanodes depend on the morphology to a large extent. This leads to change in the electron transport properties, which in turn affects power conversion efficiency. Here we report the difference in the charge transport properties of these morphologies evaluated using the time resolved photocurrent measurements. The photocurrent transients for ZnO nano-rod film exhibited dual peak behaviour, whereas transients for ZnO nano-sheet film exhibited only one peak as the time delayed second peak corresponding to slow electron diffusion was totally suppressed. The transient photocurrent decay also indicates that the charge transport rate is much faster in the ZnO nano-sheets, which allows the efficient charge collection over much larger thickness compared to other ZnO nano-rod film. The power conversion efficiency (PCE) of the devices was found to be 1.6% and 1.5 % for the ZnO-nano-rod and nano-sheet based dye sensitized solar cells respectively. A comparative study is performed and the photovoltaic parameters obtained in each case are correlated with the photocurrent transients enabling better understanding of the impact of morphology.","PeriodicalId":125634,"journal":{"name":"2011 Saudi International Electronics, Communications and Photonics Conference (SIECPC)","volume":"57 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":"124995422","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}
引用次数: 0
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