Mehdi Ghazanfari, Associate Professor, Department of Industrial Engineering, Iran University of Science and Technology, Tehran, Iran Adel Alaeddini, Corresponding Author, Adel Alaeddini, Ph.D. student, Department of Industrial Engineering, Iran University of Science and Technology, Tehran, Iran Kazem Noghondarian, Assistant Professor, Department of Industrial Engineering, Iran University of Sci...

‎in this paper‎, ‎we study translation invariant surfaces in the‎ ‎3-dimensional heisenberg group $rm nil_3$‎. ‎in particular‎, ‎we‎ ‎completely classify translation invariant surfaces in $rm nil_3$‎ ‎whose position vector $x$ satisfies the equation $delta x = ax$‎, ‎where $delta$ is the laplacian operator of the surface and $a$‎ ‎is a $3 times 3$-real matrix‎.

1Department of Molecular Biology, Pasteur Institute of Iran, Tehran, Iran; 2Department of Bacteriology, Pasteur Institute of Iran, Tehran, Iran; 3Department of Microbial Biotechnology, School of Biology, College of Science, University of Tehran, Tehran, Iran; 4Infectious Diseases ward, Imam Khomeini Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran; 5Infectious Diseases ward...

conclusions although hdv had low prevalence in our area, it is vital to plan preventive strategies for hdv spread as well as hbv prevention. it is particularly important to suspect hdv infection in active hbv carriers to manage a particularly severe dual infection. hdv infection should be suspected even in negative hbsag patients having “isolated anti-hbc” profile. results prevalence of hdv was...

recently, two of the authors have introduced the collapse capacity spectrummethodology, which allows the assessment of the collapse capacity of highly inelastic p-deltasensitive regular frame structures without performing non-linear time-history analyses. the mainingredient of this method is the collapse capacity spectrum, which represents the seismic collapsecapacity of an inelastic non-deteri...

in this paper, two inverse problems of stephen kind with local (dirichlet) boundary conditions are investigated. in the first problem only a part of boundary is unknown and in the second problem, the whole of boundary is unknown. for the both of problems, at first, analytic expressions for unknown boundary are presented, then by using these analytic expressions for unknown boundaries and bounda...

gas tungsten arc welding is a popular process in those applications requiring a high degree of quality andaccuracy. however, this process has a big disadvantage against the substantially high productivity weldingprocedures. hence, many efforts have been made to improve its productivity. one of these efforts is the use of activating flux (a-tig welding). in this study, the performance of a-tig w...

1Radiation Medicine Department, Nuclear Engineering Faculty, Shahid Beheshti University, Tehran, Iran 2Radiation Medicine Department, Nuclear Engineering Faculty, Shahid Beheshti University, Tehran, Iran 3Radiotherapy Physics Department, Cancer Institute of Tehran, Tehran, Iran 4Medical Physics Department, Medical Faculty, Iran University of Medical Science, Tehran, Iran 5Radiation Medicine Dep...

Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran, Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran, Department of Public Health, Shahroud University of Medical Sciences, Shahroud, Iran, Education Development Center, Tehran Univers...

1Department of Infectious Diseases, School of Medicine, AJA University of Medical Sciences, Tehran, IR Iran 2School of Medicine, AJA University of Medical Sciences, Tehran, IR Iran 3Department of Virology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, IR Iran 4Department of Immunology, School of Medicine, AJA University of Medical Sciences, Tehran, IR Iran 5School of Medicin...