Hafizur Rahman - Academia.edu (original) (raw)
Papers by Hafizur Rahman
Computer Vision and Pattern …, Jun 3, 1991
An approach to the detection and identification of human faces is presented, and a working, near-... more An approach to the detection and identification of human faces is presented, and a working, near-real-time face recognition system which tracks a subject's head and then recognizes the person by comparing characteristics of the face to those of known individuals is described. This approach treats face recognition as a two-dimensional recognition problem, taking advantage of the fact that faces are normally upright and thus may be described by a small set of 2-D characteristic views. Face images are projected onto a ...
The 5th International Conference on Information and Communication Technology For the Muslim World, Nov 17, 2014
2009 Sixth Ifip International Conference on Network and Parallel Computing, 2009
Abstract The complexity of an interconnection network often determines the size of the parallel c... more Abstract The complexity of an interconnection network often determines the size of the parallel computer and thus the attainable performance of a parallel computer is limited by the characteristics of the interconnection network. Pruning technique reduces the ...
DIstance MEsh with Wrap-around links (midimew) network. In this paper, we present the architectur... more DIstance MEsh with Wrap-around links (midimew) network. In this paper, we present the architecture of MMN and evaluate the total wire length of MMN, TESH, mesh, and torus networks. It is shown that the proposed MMN possesses simple structure and moderate wire length. The total wire length of MMN is slightly higher than that of mesh network and lower than that of 2-D torus network. Overall performance suggests that, MMN is an optimal network among these networks.
2009 12th International Conference on Computers and Information Technology, Dec 1, 2009
A Symmetric Tori connected Torus Network (STTN) is a 2D-torus network of multiple basic modules, ... more A Symmetric Tori connected Torus Network (STTN) is a 2D-torus network of multiple basic modules, in which the basic modules are 2D-torus networks that are hierarchically interconnected for higher-level networks. In this paper, we present the architecture of the STTN, addressing of node, routing of message, and evaluate the static network performance of STTN, TTN, TESH, mesh, and torus networks. It is shown that the STTN possesses several attractive features, including constant degree, small diameter, low cost, small average distance, moderate bisection width, and high fault tolerant performance than that of other conventional and hierarchical interconnection networks.
Page 1. Volume 1 No. 2, August 2011 International Journal of Science and Technology ©2010-11 IJST... more Page 1. Volume 1 No. 2, August 2011 International Journal of Science and Technology ©2010-11 IJST Journal. All rights reserved http://www.ejournalofsciences.org 89 A Fine Grained Technique for Viral Marketing based on Social Network: A Machine Learning Approach ...
Journal of nephrology, Jan 8, 2015
Renal transplantation (RTx) is the modality of choice for ESRD due to ANCA associated vasculitis ... more Renal transplantation (RTx) is the modality of choice for ESRD due to ANCA associated vasculitis (AAV). The significance of ANCA positivity (ANCA+) at the time of RTx on recurrent disease is controversial. We evaluated clinical outcomes and predictors of vasculitis relapse in sixteen transplanted AAV patients who were ANCA+ at RTx at a single University Medical Center. Allograft function, vasculitis relapse, and predictors of vasculitis relapse were assessed using descriptive statistics and logistic regression analysis. Our cohort had a median age of 64 years, 88 % Caucasians, 63 % males, 50 % PR3+. All patients were in remission at the time of RTx. Twelve received induction therapy and all were on mycophenolate mofetil, prednisone and tacrolimus. The mean (SD) serum creatinine was 1.2 (0.3) mg/dl at 1 year and 1.8 (1.7) mg/dl at last follow up. Six developed vasculitis relapse at post-transplant. All relapses were treated with escalation in immunosuppression. One non-compliant pati...
Issues regarding security have become vital in the world of Grid computing. Users deserve a threa... more Issues regarding security have become vital in the world of Grid computing. Users deserve a threat free environment where they are not at risk of providing their password to potential hackers when they are using it to access any protected resource. To prevent the grid resources from being illegally visited, a strong password authentication system, that requires input from both the user and server, is necessary. In this paper, based on the elliptic curve cryptosystem, we have proposed an efficient and most importantly a secure user authentication scheme for grid computing to guard against attacks like server spoofing, On-line and off-line password guessing and replay attack. The proposed scheme only requires a one-way hash function and Weil pairing, which makes it simpler and no hassle of safe guarding and private key. More over it makes uses of Lattice which is computationally must faster and efficient.
The American journal of tropical medicine and hygiene, Jan 22, 2015
Hemoglobin E is largely confined to southeast Asia. The association between hemoglobin E (HbE) an... more Hemoglobin E is largely confined to southeast Asia. The association between hemoglobin E (HbE) and malaria is less clear than that of hemoglobin S and C. As part of a malaria study in the Chittagong Hill Districts of Bangladesh, an initial random sample of 202 individuals showed that 39% and 49% of Marma and Khyang ethnic groups, respectively, were positive for either heterozygous or homozygous hemoglobin E. In this group, 6.4% were also found to be severely deficient and 35% mildly deficient for glucose-6-phosphate dehydrogenase (G6PD). In a separate Plasmodium falciparum malaria case-uninfected control study, the odds of having homozygous hemoglobin E (HbEE) compared with normal hemoglobin (HbAA) were higher among malaria cases detected by passive surveillance than age and location matched uninfected controls (odds ratio [OR] = 5.0, 95% confidence interval [CI] = 1.07-46.93; N = 142 pairs). The odds of heterozygous hemoglobin E (HbAE) compared with HbAA were similar between malari...
2014 3rd International Conference on Advanced Computer Science Applications and Technologies, 2014
Advances in Intelligent Systems and Computing, 2014
In this paper, we present a derivative of Midimew connected Mesh Network (MMN) by reassigning the... more In this paper, we present a derivative of Midimew connected Mesh Network (MMN) by reassigning the free links for higher level interconnection for the optimum performance of the MMN; called Derived MMN (DMMN). We present the architecture of DMMN, addressing of nodes, routing of message and evaluate the static network performance. It is shown that the proposed DMMN possesses several attractive features, including constant degree, small diameter, low cost, small average distance, moderate bisection width, and same fault tolerant performance than that of other conventional and hierarchical interconnection networks. With the same node degree, arc connectivity, bisection width, and wiring complexity, the average distance of the DMMN is lower than that of other networks.
Parallel and Distributed Computing and Networks / 720: Software Engineering, 2011
2013 First International Symposium on Computing and Networking, 2013
ABSTRACT We have proposed a memory sharing method of the wormhole routed network-on-chip architec... more ABSTRACT We have proposed a memory sharing method of the wormhole routed network-on-chip architecture. In our method, a memory is shared between multiple physical links by using the multi-port memory. We evaluate and discuss the communication performance in the various situations. It is shown that the minimum number of memory banks required in multiport memory for 2D-torus and 2D-mesh networks is 8. Our proposed method yields high performance for both torus and mesh networks. Even this high performance is retained when the buffer size and the packet length are same.
Dhaka University Journal of Pharmaceutical Sciences, 2008
The fractionated crude extracts and three isolated pure compounds XM-1, XM-2 and XM-3 from stem b... more The fractionated crude extracts and three isolated pure compounds XM-1, XM-2 and XM-3 from stem bark of Xylocarpus mollucensis were screened for their antibacterial and antifungal activities and cytotoxicity against brine shrimp nauplii. Petroleum ether, ethyl acetate (EtOAc) and methanol (MeOH) extracts and the compounds isolated from EtOAc fractions were studied for their antimicrobial activities. Cytotoxic activities were conducted only with EtOAc extract and its selected fractions. The EtOAc extract showed promising antimicrobial activities against all the gram positive and gram negative bacteria whereas petroleum ether extract showed moderate activities and the MeOH extract did not show any antimicrobial activities. The isolated pure compounds XM-1, XM-2 and XM-3, whose structures were not elucidated, exhibited activities against most of the bacterial strains. The cytotoxicity towards brine shrimp nauplii of the crude EtOAC extract and its selected fractions were studied. The L...
Dhaka University Journal of Pharmaceutical Sciences, 2007
The triterpinoids, betulinic acid, lupeol and betulinaldehyde, were isolated from the ethyl aceta... more The triterpinoids, betulinic acid, lupeol and betulinaldehyde, were isolated from the ethyl acetate extract of the stem bark of Avicennia officinalis (Avicenniaceae) by a combination of column and preparative thin-layer chromatography over silica gel. The structures of these compounds were determined by spectroscopic analysis (UV, IR, 1H NMR, 13CNMR and EIMS). This is the first report of a systematic phytochemical investigation and the presence of these triterpoids from this plant. Key words: Triterpenoid, Avicenniaceae, Betulinic acid, Lupeol and Betulinaldehyde Dhaka Univ. J. Pharm. Sci. Vol.5(1-2) 2006 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website
Journal of Medicine, 2014
Bangladesh Medical Journal, 2014
Tuberous sclerosis is an autosomal dominant hereditary condition with many varied forms of clinic... more Tuberous sclerosis is an autosomal dominant hereditary condition with many varied forms of clinical presentation. The most frequent cutaneous findings in tuberous sclerosis include multiple angiofibromas, hypopigmented macules, periungual fibromas and shagreen patch. It is characterized by the development of hamartomatous growths in many organs. We present a case of tuberous sclerosis with a giant left internal carotid artery aneurysm causing pulsatile proptosis, left sided ptosis, anisocoria and papillary mydriasis indicative of left third cranial nerve palsy. DOI: http://dx.doi.org/10.3329/bmj.v43i2.21393 Bangladesh Med J. 2014 May; 43 (2): 103-105
Computer Vision and Pattern …, Jun 3, 1991
An approach to the detection and identification of human faces is presented, and a working, near-... more An approach to the detection and identification of human faces is presented, and a working, near-real-time face recognition system which tracks a subject's head and then recognizes the person by comparing characteristics of the face to those of known individuals is described. This approach treats face recognition as a two-dimensional recognition problem, taking advantage of the fact that faces are normally upright and thus may be described by a small set of 2-D characteristic views. Face images are projected onto a ...
The 5th International Conference on Information and Communication Technology For the Muslim World, Nov 17, 2014
2009 Sixth Ifip International Conference on Network and Parallel Computing, 2009
Abstract The complexity of an interconnection network often determines the size of the parallel c... more Abstract The complexity of an interconnection network often determines the size of the parallel computer and thus the attainable performance of a parallel computer is limited by the characteristics of the interconnection network. Pruning technique reduces the ...
DIstance MEsh with Wrap-around links (midimew) network. In this paper, we present the architectur... more DIstance MEsh with Wrap-around links (midimew) network. In this paper, we present the architecture of MMN and evaluate the total wire length of MMN, TESH, mesh, and torus networks. It is shown that the proposed MMN possesses simple structure and moderate wire length. The total wire length of MMN is slightly higher than that of mesh network and lower than that of 2-D torus network. Overall performance suggests that, MMN is an optimal network among these networks.
2009 12th International Conference on Computers and Information Technology, Dec 1, 2009
A Symmetric Tori connected Torus Network (STTN) is a 2D-torus network of multiple basic modules, ... more A Symmetric Tori connected Torus Network (STTN) is a 2D-torus network of multiple basic modules, in which the basic modules are 2D-torus networks that are hierarchically interconnected for higher-level networks. In this paper, we present the architecture of the STTN, addressing of node, routing of message, and evaluate the static network performance of STTN, TTN, TESH, mesh, and torus networks. It is shown that the STTN possesses several attractive features, including constant degree, small diameter, low cost, small average distance, moderate bisection width, and high fault tolerant performance than that of other conventional and hierarchical interconnection networks.
Page 1. Volume 1 No. 2, August 2011 International Journal of Science and Technology ©2010-11 IJST... more Page 1. Volume 1 No. 2, August 2011 International Journal of Science and Technology ©2010-11 IJST Journal. All rights reserved http://www.ejournalofsciences.org 89 A Fine Grained Technique for Viral Marketing based on Social Network: A Machine Learning Approach ...
Journal of nephrology, Jan 8, 2015
Renal transplantation (RTx) is the modality of choice for ESRD due to ANCA associated vasculitis ... more Renal transplantation (RTx) is the modality of choice for ESRD due to ANCA associated vasculitis (AAV). The significance of ANCA positivity (ANCA+) at the time of RTx on recurrent disease is controversial. We evaluated clinical outcomes and predictors of vasculitis relapse in sixteen transplanted AAV patients who were ANCA+ at RTx at a single University Medical Center. Allograft function, vasculitis relapse, and predictors of vasculitis relapse were assessed using descriptive statistics and logistic regression analysis. Our cohort had a median age of 64 years, 88 % Caucasians, 63 % males, 50 % PR3+. All patients were in remission at the time of RTx. Twelve received induction therapy and all were on mycophenolate mofetil, prednisone and tacrolimus. The mean (SD) serum creatinine was 1.2 (0.3) mg/dl at 1 year and 1.8 (1.7) mg/dl at last follow up. Six developed vasculitis relapse at post-transplant. All relapses were treated with escalation in immunosuppression. One non-compliant pati...
Issues regarding security have become vital in the world of Grid computing. Users deserve a threa... more Issues regarding security have become vital in the world of Grid computing. Users deserve a threat free environment where they are not at risk of providing their password to potential hackers when they are using it to access any protected resource. To prevent the grid resources from being illegally visited, a strong password authentication system, that requires input from both the user and server, is necessary. In this paper, based on the elliptic curve cryptosystem, we have proposed an efficient and most importantly a secure user authentication scheme for grid computing to guard against attacks like server spoofing, On-line and off-line password guessing and replay attack. The proposed scheme only requires a one-way hash function and Weil pairing, which makes it simpler and no hassle of safe guarding and private key. More over it makes uses of Lattice which is computationally must faster and efficient.
The American journal of tropical medicine and hygiene, Jan 22, 2015
Hemoglobin E is largely confined to southeast Asia. The association between hemoglobin E (HbE) an... more Hemoglobin E is largely confined to southeast Asia. The association between hemoglobin E (HbE) and malaria is less clear than that of hemoglobin S and C. As part of a malaria study in the Chittagong Hill Districts of Bangladesh, an initial random sample of 202 individuals showed that 39% and 49% of Marma and Khyang ethnic groups, respectively, were positive for either heterozygous or homozygous hemoglobin E. In this group, 6.4% were also found to be severely deficient and 35% mildly deficient for glucose-6-phosphate dehydrogenase (G6PD). In a separate Plasmodium falciparum malaria case-uninfected control study, the odds of having homozygous hemoglobin E (HbEE) compared with normal hemoglobin (HbAA) were higher among malaria cases detected by passive surveillance than age and location matched uninfected controls (odds ratio [OR] = 5.0, 95% confidence interval [CI] = 1.07-46.93; N = 142 pairs). The odds of heterozygous hemoglobin E (HbAE) compared with HbAA were similar between malari...
2014 3rd International Conference on Advanced Computer Science Applications and Technologies, 2014
Advances in Intelligent Systems and Computing, 2014
In this paper, we present a derivative of Midimew connected Mesh Network (MMN) by reassigning the... more In this paper, we present a derivative of Midimew connected Mesh Network (MMN) by reassigning the free links for higher level interconnection for the optimum performance of the MMN; called Derived MMN (DMMN). We present the architecture of DMMN, addressing of nodes, routing of message and evaluate the static network performance. It is shown that the proposed DMMN possesses several attractive features, including constant degree, small diameter, low cost, small average distance, moderate bisection width, and same fault tolerant performance than that of other conventional and hierarchical interconnection networks. With the same node degree, arc connectivity, bisection width, and wiring complexity, the average distance of the DMMN is lower than that of other networks.
Parallel and Distributed Computing and Networks / 720: Software Engineering, 2011
2013 First International Symposium on Computing and Networking, 2013
ABSTRACT We have proposed a memory sharing method of the wormhole routed network-on-chip architec... more ABSTRACT We have proposed a memory sharing method of the wormhole routed network-on-chip architecture. In our method, a memory is shared between multiple physical links by using the multi-port memory. We evaluate and discuss the communication performance in the various situations. It is shown that the minimum number of memory banks required in multiport memory for 2D-torus and 2D-mesh networks is 8. Our proposed method yields high performance for both torus and mesh networks. Even this high performance is retained when the buffer size and the packet length are same.
Dhaka University Journal of Pharmaceutical Sciences, 2008
The fractionated crude extracts and three isolated pure compounds XM-1, XM-2 and XM-3 from stem b... more The fractionated crude extracts and three isolated pure compounds XM-1, XM-2 and XM-3 from stem bark of Xylocarpus mollucensis were screened for their antibacterial and antifungal activities and cytotoxicity against brine shrimp nauplii. Petroleum ether, ethyl acetate (EtOAc) and methanol (MeOH) extracts and the compounds isolated from EtOAc fractions were studied for their antimicrobial activities. Cytotoxic activities were conducted only with EtOAc extract and its selected fractions. The EtOAc extract showed promising antimicrobial activities against all the gram positive and gram negative bacteria whereas petroleum ether extract showed moderate activities and the MeOH extract did not show any antimicrobial activities. The isolated pure compounds XM-1, XM-2 and XM-3, whose structures were not elucidated, exhibited activities against most of the bacterial strains. The cytotoxicity towards brine shrimp nauplii of the crude EtOAC extract and its selected fractions were studied. The L...
Dhaka University Journal of Pharmaceutical Sciences, 2007
The triterpinoids, betulinic acid, lupeol and betulinaldehyde, were isolated from the ethyl aceta... more The triterpinoids, betulinic acid, lupeol and betulinaldehyde, were isolated from the ethyl acetate extract of the stem bark of Avicennia officinalis (Avicenniaceae) by a combination of column and preparative thin-layer chromatography over silica gel. The structures of these compounds were determined by spectroscopic analysis (UV, IR, 1H NMR, 13CNMR and EIMS). This is the first report of a systematic phytochemical investigation and the presence of these triterpoids from this plant. Key words: Triterpenoid, Avicenniaceae, Betulinic acid, Lupeol and Betulinaldehyde Dhaka Univ. J. Pharm. Sci. Vol.5(1-2) 2006 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website
Journal of Medicine, 2014
Bangladesh Medical Journal, 2014
Tuberous sclerosis is an autosomal dominant hereditary condition with many varied forms of clinic... more Tuberous sclerosis is an autosomal dominant hereditary condition with many varied forms of clinical presentation. The most frequent cutaneous findings in tuberous sclerosis include multiple angiofibromas, hypopigmented macules, periungual fibromas and shagreen patch. It is characterized by the development of hamartomatous growths in many organs. We present a case of tuberous sclerosis with a giant left internal carotid artery aneurysm causing pulsatile proptosis, left sided ptosis, anisocoria and papillary mydriasis indicative of left third cranial nerve palsy. DOI: http://dx.doi.org/10.3329/bmj.v43i2.21393 Bangladesh Med J. 2014 May; 43 (2): 103-105