The Experts below are selected from a list of 873 Experts worldwide ranked by ideXlab platform
Govindarajan Suresh Kumar - One of the best experts on this subject based on the ideXlab platform.
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Influence of Fracture Heterogeneity Using Linear Congruential Generator (LCG) on the Thermal Front Propagation in a Single Geothermal Fracture-Rock Matrix System
Energies, 2018Co-Authors: Nikhil Bagalkot, Alireza Zare, Govindarajan Suresh KumarAbstract:An implicit finite difference numerical model has been developed to investigate the influence of fracture heterogeneity on the propagation of thermal front in a single horizontal fracture-matrix system. Instead of depending on a complex and data-demanding geostatistical method for a precise representation of fracture aperture, a statistical Linear Congruential Generator (LCG) method was applied in the present study to replicate the unpredictable nature of fracture aperture morphology. The results have been compared with the parallel plate model and simple sinusoidal model. Finally, sensitivity analysis of fracture aperture size and fluid flow rate has been carried out to identify the conditions at which fracture heterogeneity is critical. The results indicate that LCG-aperture enhances the heat transfer between fracture and hot rock matrix compared to the parallel and sinusoidal fractures. Further, the temperature profiles in hot rock indicate that there was a greater loss of heat for the case of LCG-aperture (25% loss) compared to sinusoidal (16%) and parallel plate (8%) apertures. It was found that heterogeneity does not play a major role at small fracture aperture size (≤50 μm) and at low flow rates. However, as fracture aperture size increases, the heterogeneity plays a vital part even at low flow rates.
Sabanari, Riando Putra - One of the best experts on this subject based on the ideXlab platform.
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Analisis dan Modifikasi pada Kriptografi Block Cipher dengan Pola Motif Kain Tenun Timor Guna Pemenuhan Prinsip Iterated Block Cipher
Program Studi Teknik Informatika FTI-UKSW, 2016Co-Authors: Sabanari, Riando PutraAbstract:Perancangan algoritma kriptografi berbasis motif kain tenun timor dan Linear Congruential Generator adalah suatu rancangan algoritma kriptografi cipher block yang beroperasi dalam bentuk bit, dan termasuk dalam teknik kriptografi kunci simetris. Pada dasarnya algoritma kriptografi ini dapat mengenkripsi dan mendekripsi data dengan cukup baik. Akan tetapi, sebuah kriptografi block cipher harus memiliki prinsip dasar yaitu iterated block cipher. Penelitian ini mencoba menerapkan iterated block cipher pada algoritma kriptografi Kain Tenun Timor dan Linear Congruential Generator (LCG) sebagai pembangkit kunci. Hasil dari penelitian ini adalah modifikasi algoritma kriptografi KTT dan LCG untuk menghasilkan kriptografi menjadi lebih baik berdasarkan keacakan bit untuk memenuhi standar keamanan prinsip dasar kriptografi block cipher serta menaikan Avalance effect dengan membandingkan kriptografi yang lain.The design of the cryptographic algorithm-based motif woven Timor and Linear Congruential Generator is a block cipher design of cryptographic algorithms that operate in the form of bits, and included in symmetric key cryptography techniques. Basically the cryptographic algorithm can encrypt and decrypt the data quite well. However, a cryptographic block cipher must have the basic principles, namely iterated block cipher. This study tries to apply iterated block cipher on cryptographic algorithms of Kain Tenun Timor and Linear Congruential Generator (LCG) to generate the key. Results from this study is the modification of the cryptographic algorithms and LCG summit to generate cryptographic become better based on the randomness of bits to meet safety standards, the basic principles of cryptography block cipher as well as increase the effect by comparing cryptographic Avalance others
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Analisis dan Modifikasi pada Kriptografi Block Cipher dengan Pola Motif Kain Tenun Timor Guna Pemenuhan Prinsip Iterated Block Cipher
Program Studi Teknik Informatika FTI-UKSW, 2016Co-Authors: Sabanari, Riando PutraAbstract:Perancangan algoritma kriptografi berbasis motif kain tenun timor dan Linear Congruential Generator adalah suatu rancangan algoritma kriptografi cipher block yang beroperasi dalam bentuk bit, dan termasuk dalam teknik kriptografi kunci simetris. Pada dasarnya algoritma kriptografi ini dapat mengenkripsi dan mendekripsi data dengan cukup baik. Akan tetapi, sebuah kriptografi block cipher harus memiliki prinsip dasar yaitu iterated block cipher. Penelitian ini mencoba menerapkan iterated block cipher pada algoritma kriptografi Kain Tenun Timor dan Linear Congruential Generator (LCG) sebagai pembangkit kunci. Hasil dari penelitian ini adalah modifikasi algoritma kriptografi KTT dan LCG untuk menghasilkan kriptografi menjadi lebih baik berdasarkan keacakan bit untuk memenuhi standar keamanan prinsip dasar kriptografi block cipher serta menaikan Avalance effect dengan membandingkan kriptografi yang lain
Nikhil Bagalkot - One of the best experts on this subject based on the ideXlab platform.
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Influence of Fracture Heterogeneity Using Linear Congruential Generator (LCG) on the Thermal Front Propagation in a Single Geothermal Fracture-Rock Matrix System
Energies, 2018Co-Authors: Nikhil Bagalkot, Alireza Zare, Govindarajan Suresh KumarAbstract:An implicit finite difference numerical model has been developed to investigate the influence of fracture heterogeneity on the propagation of thermal front in a single horizontal fracture-matrix system. Instead of depending on a complex and data-demanding geostatistical method for a precise representation of fracture aperture, a statistical Linear Congruential Generator (LCG) method was applied in the present study to replicate the unpredictable nature of fracture aperture morphology. The results have been compared with the parallel plate model and simple sinusoidal model. Finally, sensitivity analysis of fracture aperture size and fluid flow rate has been carried out to identify the conditions at which fracture heterogeneity is critical. The results indicate that LCG-aperture enhances the heat transfer between fracture and hot rock matrix compared to the parallel and sinusoidal fractures. Further, the temperature profiles in hot rock indicate that there was a greater loss of heat for the case of LCG-aperture (25% loss) compared to sinusoidal (16%) and parallel plate (8%) apertures. It was found that heterogeneity does not play a major role at small fracture aperture size (≤50 μm) and at low flow rates. However, as fracture aperture size increases, the heterogeneity plays a vital part even at low flow rates.
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Influence of Fracture Heterogeneity Using Linear Congruential Generator (LCG) on the Thermal Front Propagation in a Single Geothermal Fracture-Rock Matrix System
MDPI AG, 2018Co-Authors: Nikhil Bagalkot, Alireza Zare, Suresh G KumarAbstract:An implicit finite difference numerical model has been developed to investigate the influence of fracture heterogeneity on the propagation of thermal front in a single horizontal fracture-matrix system. Instead of depending on a complex and data-demanding geostatistical method for a precise representation of fracture aperture, a statistical Linear Congruential Generator (LCG) method was applied in the present study to replicate the unpredictable nature of fracture aperture morphology. The results have been compared with the parallel plate model and simple sinusoidal model. Finally, sensitivity analysis of fracture aperture size and fluid flow rate has been carried out to identify the conditions at which fracture heterogeneity is critical. The results indicate that LCG-aperture enhances the heat transfer between fracture and hot rock matrix compared to the parallel and sinusoidal fractures. Further, the temperature profiles in hot rock indicate that there was a greater loss of heat for the case of LCG-aperture (25% loss) compared to sinusoidal (16%) and parallel plate (8%) apertures. It was found that heterogeneity does not play a major role at small fracture aperture size (≤50 μm) and at low flow rates. However, as fracture aperture size increases, the heterogeneity plays a vital part even at low flow rates
Nova Rijati - One of the best experts on this subject based on the ideXlab platform.
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Secured PVD Video Steganography Method based on AES and Linear Congruential Generator
2018 International Seminar on Research of Information Technology and Intelligent Systems (ISRITI), 2018Co-Authors: Eko Hari Rachmawanto, Khabib Prasetyo, Christy Atika Sari, De Rosal Ignatius Moses Setiadi, Nova RijatiAbstract:It is inevitable that technology is advancing and entering the digital era. So that data security is a problem that is often found in this era, there are many ways to secure data. Some ways to secure data include cryptography and steganography. One cryptographic algorithm that has high security standards is Advanced Encryption Standard (AES). While steganography is a way to insert messages into certain media, but it does not appear to change the original media. This study proposes a security technique for secret texts encrypted with the AES method, then hidden into one of the video frames covers using the Pixel-value differencing (PVD) steganography method. To determine the frame to be watched, the Linear Congruential Generator (LCG) algorithm is used. The proposed method proved to be satisfactory because it produced an average MSE value of less than 0.15 and PSNR averaged over 57 dBs. Message security is also more awake because messages are protected in double by AES encryption and secret keys used to run LCG Generators.
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Secured PVD Video Steganography Method based on AES and Linear Congruential Generator
2018 International Seminar on Research of Information Technology and Intelligent Systems (ISRITI), 2018Co-Authors: Eko Hari Rachmawanto, Khabib Prasetyo, Christy Atika Sari, Ignatius Moses Setiadi De Rosal, Nova RijatiAbstract:It is inevitable that technology is advancing and entering the digital era. So that data security is a problem that is often found in this era, there are many ways to secure data. Some ways to secure data include cryptography and steganography. One cryptographic algorithm that has high security standards is Advanced Encryption Standard (AES). While steganography is a way to insert messages into certain media, but it does not appear to change the original media. This study proposes a security technique for secret texts encrypted with the AES method, then hidden into one of the video frames covers using the Pixel-value differencing (PVD) steganography method. To determine the frame to be watched, the Linear Congruential Generator (LCG) algorithm is used. The proposed method proved to be satisfactory because it produced an average MSE value of less than 0.15 and PSNR averaged over 57 dBs. Message security is also more awake because messages are protected in double by AES encryption and secret keys used to run LCG Generators.
Alireza Zare - One of the best experts on this subject based on the ideXlab platform.
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Influence of Fracture Heterogeneity Using Linear Congruential Generator (LCG) on the Thermal Front Propagation in a Single Geothermal Fracture-Rock Matrix System
Energies, 2018Co-Authors: Nikhil Bagalkot, Alireza Zare, Govindarajan Suresh KumarAbstract:An implicit finite difference numerical model has been developed to investigate the influence of fracture heterogeneity on the propagation of thermal front in a single horizontal fracture-matrix system. Instead of depending on a complex and data-demanding geostatistical method for a precise representation of fracture aperture, a statistical Linear Congruential Generator (LCG) method was applied in the present study to replicate the unpredictable nature of fracture aperture morphology. The results have been compared with the parallel plate model and simple sinusoidal model. Finally, sensitivity analysis of fracture aperture size and fluid flow rate has been carried out to identify the conditions at which fracture heterogeneity is critical. The results indicate that LCG-aperture enhances the heat transfer between fracture and hot rock matrix compared to the parallel and sinusoidal fractures. Further, the temperature profiles in hot rock indicate that there was a greater loss of heat for the case of LCG-aperture (25% loss) compared to sinusoidal (16%) and parallel plate (8%) apertures. It was found that heterogeneity does not play a major role at small fracture aperture size (≤50 μm) and at low flow rates. However, as fracture aperture size increases, the heterogeneity plays a vital part even at low flow rates.
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Influence of Fracture Heterogeneity Using Linear Congruential Generator (LCG) on the Thermal Front Propagation in a Single Geothermal Fracture-Rock Matrix System
MDPI AG, 2018Co-Authors: Nikhil Bagalkot, Alireza Zare, Suresh G KumarAbstract:An implicit finite difference numerical model has been developed to investigate the influence of fracture heterogeneity on the propagation of thermal front in a single horizontal fracture-matrix system. Instead of depending on a complex and data-demanding geostatistical method for a precise representation of fracture aperture, a statistical Linear Congruential Generator (LCG) method was applied in the present study to replicate the unpredictable nature of fracture aperture morphology. The results have been compared with the parallel plate model and simple sinusoidal model. Finally, sensitivity analysis of fracture aperture size and fluid flow rate has been carried out to identify the conditions at which fracture heterogeneity is critical. The results indicate that LCG-aperture enhances the heat transfer between fracture and hot rock matrix compared to the parallel and sinusoidal fractures. Further, the temperature profiles in hot rock indicate that there was a greater loss of heat for the case of LCG-aperture (25% loss) compared to sinusoidal (16%) and parallel plate (8%) apertures. It was found that heterogeneity does not play a major role at small fracture aperture size (≤50 μm) and at low flow rates. However, as fracture aperture size increases, the heterogeneity plays a vital part even at low flow rates
