{"title":"Robust Face Recognition by Applying Partitioning Around Medoids Over Eigen Faces and Fisher Faces","authors":"Aruna Bhat","doi":"10.5121/IJCSA.2014.4304","DOIUrl":"https://doi.org/10.5121/IJCSA.2014.4304","url":null,"abstract":"","PeriodicalId":39465,"journal":{"name":"International Journal of Computer Science and Applications","volume":"19 1","pages":"39-50"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78765597","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}
Khomdram Jolson Singh, Chelsea Leiphrakpam, Nongthombam Palbir Singh, N. Singh, Subir Kumar Sarkar
Nanopillar array photovoltaics give unique advantages over today’s planar thin films in the areas of optical properties and carrier collection, arising from their 3D geometry. The choice of the material system, however, is essential in order to gain the advantage of the large surface/interface area associated with nanopillars. Therefore, a well known Si and GaAs material are used in the design and studied in this nanowire application. This work calculates and analyses the performance of the coaxial GaAs nanowire and compared with that of Si nanowire using a semi-classical method. The current-voltage characteristics are investigated for both under dark and AM1.5G illumination. It is found that GaAs nanowire gives almost double efficiency with its counterpart Si nanowire. Their TCAD simulations can be validated reasonably with that of published experimental result.
{"title":"3D Single Gaas Co-Axial Nanowire Solar Cell for Nanopillar-Array Photovoltaic Device","authors":"Khomdram Jolson Singh, Chelsea Leiphrakpam, Nongthombam Palbir Singh, N. Singh, Subir Kumar Sarkar","doi":"10.5121/IJCSA.2014.4309","DOIUrl":"https://doi.org/10.5121/IJCSA.2014.4309","url":null,"abstract":"Nanopillar array photovoltaics give unique advantages over today’s planar thin films in the areas of optical properties and carrier collection, arising from their 3D geometry. The choice of the material system, however, is essential in order to gain the advantage of the large surface/interface area associated with nanopillars. Therefore, a well known Si and GaAs material are used in the design and studied in this nanowire application. This work calculates and analyses the performance of the coaxial GaAs nanowire and compared with that of Si nanowire using a semi-classical method. The current-voltage characteristics are investigated for both under dark and AM1.5G illumination. It is found that GaAs nanowire gives almost double efficiency with its counterpart Si nanowire. Their TCAD simulations can be validated reasonably with that of published experimental result.","PeriodicalId":39465,"journal":{"name":"International Journal of Computer Science and Applications","volume":"4 1","pages":"91-100"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74324863","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}
Khomdram Jolson Singh, K. L. R. Kho, Sapam Jitu Singh, Yengkhom Chandrika Devi, N. Singh, S. Sarkar
The implementation of a neural network especially for improving the accuracy of the electrical equivalent circuit parameters of a solar cell is proposed. These electrical parameters mainly depend on solar irradiation and temperature, but their relationship is nonlinear and cannot be easily expressed by any analytical equation. Therefore, the proposed neural network is trained once by using some measured current–voltage curves, and the equivalent circuit parameters are estimated by only reading the samples of solar irradiation and temperature very quickly. Taking the effect of sunlight irradiance and ambient temperature into consideration, the output current and power characteristics of PV model are simulated and optimized. Finally, the proposed model has been validated with datasheet and experimental data from commercial PV module, Kotak PV-KM0060 (60Wp).The comparison show the higher accuracy of the ANN model than the conventional one diode circuit model for all operating conditions.
{"title":"Artificial Neural Network Approach for More Accurate Solar Cell Electrical Circuit Model","authors":"Khomdram Jolson Singh, K. L. R. Kho, Sapam Jitu Singh, Yengkhom Chandrika Devi, N. Singh, S. Sarkar","doi":"10.5121/IJCSA.2014.4310","DOIUrl":"https://doi.org/10.5121/IJCSA.2014.4310","url":null,"abstract":"The implementation of a neural network especially for improving the accuracy of the electrical equivalent circuit parameters of a solar cell is proposed. These electrical parameters mainly depend on solar irradiation and temperature, but their relationship is nonlinear and cannot be easily expressed by any analytical equation. Therefore, the proposed neural network is trained once by using some measured current–voltage curves, and the equivalent circuit parameters are estimated by only reading the samples of solar irradiation and temperature very quickly. Taking the effect of sunlight irradiance and ambient temperature into consideration, the output current and power characteristics of PV model are simulated and optimized. Finally, the proposed model has been validated with datasheet and experimental data from commercial PV module, Kotak PV-KM0060 (60Wp).The comparison show the higher accuracy of the ANN model than the conventional one diode circuit model for all operating conditions.","PeriodicalId":39465,"journal":{"name":"International Journal of Computer Science and Applications","volume":"36 1","pages":"101-116"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89621388","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":"Nocs Performance Improvement Using Parallel Transmission Through Wireless Links","authors":"Shokoofeh Bakhtiari, M. Reshadi","doi":"10.5121/IJCSA.2014.4305","DOIUrl":"https://doi.org/10.5121/IJCSA.2014.4305","url":null,"abstract":"","PeriodicalId":39465,"journal":{"name":"International Journal of Computer Science and Applications","volume":"6 1","pages":"51-60"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74621577","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}
This paper presents a comparative performance analysis of wireless orthogonal frequency division multiplexing (OFDM) system with the implementation of comb type pilot-based channel estimation algorithm over frequency selective multi-path fading channels. The Minimum Mean Square Error (MMSE) method is used for the estimation of channel at pilot frequencies. For the estimation of channel at data frequencies different interpolation techniques such as low-pass, linear, and second order interpolation are employed. The OFDM system simulation has been carried out with Matlab and the performance is analyzed in terms of bit error rate (BER) for various signal mapping (BPSK, QPSK, 4QAM, 16QAM, and 64QAM) and channel (Rayleigh and Rician) conditions. The impact of selecting number of channel taps on the BER performance is also investigated.
{"title":"A Comparative Performance Study of OFDM System with the Implementation of Comb Pilot-Based MMSE Channel Estimation","authors":"Touhidul Islam A.Z.M","doi":"10.5121/IJCSA.2013.3605","DOIUrl":"https://doi.org/10.5121/IJCSA.2013.3605","url":null,"abstract":"This paper presents a comparative performance analysis of wireless orthogonal frequency division multiplexing (OFDM) system with the implementation of comb type pilot-based channel estimation algorithm over frequency selective multi-path fading channels. The Minimum Mean Square Error (MMSE) method is used for the estimation of channel at pilot frequencies. For the estimation of channel at data frequencies different interpolation techniques such as low-pass, linear, and second order interpolation are employed. The OFDM system simulation has been carried out with Matlab and the performance is analyzed in terms of bit error rate (BER) for various signal mapping (BPSK, QPSK, 4QAM, 16QAM, and 64QAM) and channel (Rayleigh and Rician) conditions. The impact of selecting number of channel taps on the BER performance is also investigated.","PeriodicalId":39465,"journal":{"name":"International Journal of Computer Science and Applications","volume":"74 1","pages":"45-53"},"PeriodicalIF":0.0,"publicationDate":"2013-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85881933","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":"Coupler, Power Divider and Circulator in V-Band Substrate Integrated Waveguide Technology","authors":"Bouchra Rahali, M. Feham","doi":"10.5121/IJCSA.2013.3607","DOIUrl":"https://doi.org/10.5121/IJCSA.2013.3607","url":null,"abstract":"","PeriodicalId":39465,"journal":{"name":"International Journal of Computer Science and Applications","volume":"5 1","pages":"63-72"},"PeriodicalIF":0.0,"publicationDate":"2013-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81025069","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}
This work shows expert system of symmetrical single magnetic lens used in focused ion beam optical system. Java expert system shell(JESS) programming is proposed to build the intelligent agent "MOPTION"for getting an optimum magnetic flux density , and calculate the ion optical trajectory. The combination of such rule based engine and SIMION 8.1 has configured the reconstruction process and compiled the data retrieved by the proposed expert system agent to implement the pole-pieces reconstruction for lens design. The pole pieces reconstruction has been resulted in 3D graph , and under the infinite magnification conditions of the optical path, aberration (spherical / chromatic and total) disks diameters have been obtained and got the values (0.03,0.13 and 0.133) micron (µm) respectively.
{"title":"Expert system of single magnetic lens using JESS in Focused Ion Beam","authors":"Fadhil A. Ali","doi":"10.5121/IJCSA.2013.3601","DOIUrl":"https://doi.org/10.5121/IJCSA.2013.3601","url":null,"abstract":"This work shows expert system of symmetrical single magnetic lens used in focused ion beam optical system. Java expert system shell(JESS) programming is proposed to build the intelligent agent \"MOPTION\"for getting an optimum magnetic flux density , and calculate the ion optical trajectory. The combination of such rule based engine and SIMION 8.1 has configured the reconstruction process and compiled the data retrieved by the proposed expert system agent to implement the pole-pieces reconstruction for lens design. The pole pieces reconstruction has been resulted in 3D graph , and under the infinite magnification conditions of the optical path, aberration (spherical / chromatic and total) disks diameters have been obtained and got the values (0.03,0.13 and 0.133) micron (µm) respectively.","PeriodicalId":39465,"journal":{"name":"International Journal of Computer Science and Applications","volume":"1 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2013-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90952787","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}
Anaphora Resolution is a method of determining what a particular noun phrase or pronoun at a given instance refers to. In this paper, we have discussed how Anaphora Resolution is useful in performing computation linguistic task in various Natural languages including the Indian languages. Also, we have discussed how Anaphora Resolution is conducive in handling unknown words in Named Entity Recognition.
{"title":"Handling Ambiguities and Unknown Words in Named Entity Recognition Using Anaphora Resolution","authors":"Deepti Chopra, G. Purohit","doi":"10.5121/IJCSA.2013.3504","DOIUrl":"https://doi.org/10.5121/IJCSA.2013.3504","url":null,"abstract":"Anaphora Resolution is a method of determining what a particular noun phrase or pronoun at a given instance refers to. In this paper, we have discussed how Anaphora Resolution is useful in performing computation linguistic task in various Natural languages including the Indian languages. Also, we have discussed how Anaphora Resolution is conducive in handling unknown words in Named Entity Recognition.","PeriodicalId":39465,"journal":{"name":"International Journal of Computer Science and Applications","volume":"18 1","pages":"29-35"},"PeriodicalIF":0.0,"publicationDate":"2013-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78360059","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":"Parsing of Xml File to Make Secure Transaction in Mobile Commerce","authors":"J. Arora, S. Madan","doi":"10.5121/ijcsa.2013.3502","DOIUrl":"https://doi.org/10.5121/ijcsa.2013.3502","url":null,"abstract":"","PeriodicalId":39465,"journal":{"name":"International Journal of Computer Science and Applications","volume":"25 1","pages":"9-15"},"PeriodicalIF":0.0,"publicationDate":"2013-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76301936","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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