SpringerIranian Journal of Science and Technology (Sciences)1028-627631220070811COMBINED HEAT AND MASS TRANSFER IN MHD FREE CONVECTION FROM A WEDGE WITH OHMIC HEATING AND VISCOUS DISSIPATION IN THE PRESENCE OF SUCTION OR INJECTION151162232410.22099/ijsts.2007.2324ENR. KANDASAMYCentre for Science Studies, University of Tun Hussein Onn, Malaysia,
86400 Parit Raja, Batu Pahat Johor, MalaysiaI. HASHIMSchool of Mathematical Sciences, University of Kebangsaan, Malaysia,
43600 UKM Bangi Selangor, MalaysiaA. B. KHAMISCentre for Science Studies, University of Tun Hussein Onn, Malaysia,
86400 Parit Raja, Batu Pahat Johor, MalaysiaI. MUHAIMINCentre for Science Studies, University of Tun Hussein Onn, Malaysia,
86400 Parit Raja, Batu Pahat Johor, MalaysiaJournal Article20050713The problem of combined heat and mass transfer of an electrically conducting fluid in MHD<br />natural convection adjacent to a vertical surface is analyzed, taking into account the effects of Ohmic heating<br />in the presence of suction or injection. An approximate numerical solution for the steady laminar boundarylayer<br />flow over a wall of the wedge in the presence of species concentration and mass diffusion has been<br />obtained by solving the governing equations using the numerical technique. The fluid is assumed to be<br />viscous and incompressible. Numerical calculations are carried out for different values of dimensionless<br />parameters and an analysis of the results obtained shows that the flow field is influenced appreciably by the<br />magnetic effect, the buoyancy ratio between species and thermal diffusion and suction/injection at the wall<br />surface. Effects of these major parameters on transport behaviors are investigated methodically and typical<br />results are illustrated to reveal the tendency of the solutions. Representative results are presented for the<br />velocity, temperature, and concentration distributions, as well as the local skin-friction coefficient and skin<br />friction.SpringerIranian Journal of Science and Technology (Sciences)1028-627631220070811ON PROBLEMS REDUCING TO THE GOURSAT PROBLEM FOR A FOURTH ORDER EQUATION163170232510.22099/ijsts.2007.2325ENA. MAHERDepartment of Mathematics, Faculty of Science, Assiut University, 71516, EgyptYE. A. UTKINADepartment of Differential Equations, Kazan State University,
18 Kremlyovskaya St., Kazan, 420008, RussiaJournal Article20061111In this paper, we investigate some problems which can be reduced to the Goursat problem for a<br />fourth order equation. Some results and theorems are given concerning the existence and uniqence for the<br />solution of the suggested problem.SpringerIranian Journal of Science and Technology (Sciences)1028-627631220070811HIGH SPIN STATES IN 191OS171175232610.22099/ijsts.2007.2326ENS. MOHAMMADIPhysics Department, Payam Noor University, Mashhad 91735, I. R. of IranZS. PODOLYAKDepartment of Physics, University of Surrey, Guildford, GU2 7XH, UKJournal Article20050124High spin states in the neutron rich nucleus 191Os has been populated for the first time using the<br />82Se+192Os deep-inelastic reaction at 460 MeV beam energy using the ALPI accelerators at the Laboratory<br />Nazionali di Legnaro, Italy. High fold γ-γ coincidences were acquired with the 4π spectrometer GASP<br />detector array, consisting of 40 Compton-suppressed, large-volume germanium detectors with an inner ball<br />consisting of 80 BGO crystals acting as a multiplicity filter and a total-energy spectrometer. The new<br />discovered level scheme is extended up to spin 19/2+. The observed structure is interpreted as fragments of a<br />rotational band built on single neutron configuration {11/2+ [615]} according to a Nilsson deformed shell<br />model.SpringerIranian Journal of Science and Technology (Sciences)1028-627631220070811ON THE HELICES IN THE GALILEAN SPACE G3177181232710.22099/ijsts.2007.2327ENA. O. OGRENMISDepartment of Mathematics, Firat University, 23119, Elazig, TurkeyE. ERGUTDepartment of Mathematics, Firat University, 23119, Elazig, TurkeyM. BEKTASDepartment of Mathematics, Firat University, 23119, Elazig, TurkeyJournal Article20061010T. Ikawa obtained an ordinary differential equation for the circular helix. Recently, the helix have<br />been investigated by many differential geometers such as T. Ikawa, H. Balgetir, M. Bektas, M. Ergut, N.<br />Ekmekci and H. H. Hacısalihoglu. In this paper, making use of this author’s methods, we obtained<br />characterizations of helix for a curve with respect to the Frenet frame in 3-dimensional Galilean space G3.SpringerIranian Journal of Science and Technology (Sciences)1028-627631220070811DOUBLE SEQUENCE SPACES DEFINED BY ORLICZ FUNCTIONS183188232810.22099/ijsts.2007.2328ENE. SAVASIstanbul Ticaret University, Department of Mathematics, Uskudar, Istanbul, TurkeyR. F. PATTERSONUniversity of North Florida, Building 11 Jacksonville, Florida 32224, USAJournal Article20050327In this paper we introduce some new double sequence spaces using the Orlicz function and<br />examine some properties of the resulting sequence spaces.SpringerIranian Journal of Science and Technology (Sciences)1028-627631220070811SEQUENTIAL ESTIMATION IN A SUBCLASS OF EXPONENTIAL FAMILY UNDER WEIGHTED SQUARED ERROR LOSS189197232910.22099/ijsts.2007.2329ENN. NEMATOLLAHIDepartment of Statistics, Faculty of Economics, Allameh Tabataba'i University, Tehran, I. R. of IranM. JAFARI JOZANIDepartment of Statistics, Faculty of Economics, Allameh Tabataba'i University, Tehran, I. R. of IranN. MAHLOOJIDepartment of Statistics, Faculty of Economics, Allameh Tabataba'i University, Tehran, I. R. of IranJournal Article20050831In a subclass of the scale-parameter exponential family, we consider the sequential point<br />estimation of a function of the scale parameter under the loss function given as the sum of the weighted<br />squared error loss and a linear cost. For a fully sequential sampling scheme, second order expansions are<br />obtained for the expected sample size as well as for the regret of the procedure. The former researches on<br />Gamma and Exponential distributions can be deduced from our general results.SpringerIranian Journal of Science and Technology (Sciences)1028-627631220070811MINIMIZING LOSS PROBABILITY IN QUEUING SYSTEMS WITH HETEROGENEOUS SERVERS199206233010.22099/ijsts.2007.2330ENV. SAGLAMDepartment of Statistic, Faculty of Arts and Sciences, Ondokuz
Mayis University, Kurupelit, 55139-Samsun, Turkey,A. SHAHBAZOVDepartment of Statistic, Faculty of Arts and Sciences, Ondokuz
Mayis University, Kurupelit, 55139-Samsun, TurkeyJournal Article20050327The probability of losing a customer in M/G/n/0 and GI/M/n/0 loss queuing systems with<br />heterogeneous servers is minimized. The first system uses a queue discipline in which a customer who arrives<br />when there are free servers chooses any one of them with equal probability, but is lost otherwise. Provided<br />that the sum of the servers rates are fixed, loss probability in this system attains minimum value when all the<br />service rates are equal. The second system uses queue discipline, in which a customer who enters into the<br />system is assigned to the server with the lowest number. Loss probability in this system takes the minimum<br />value in the case when the fastest server rule is used in which an incoming customer is served by the free<br />server with the shortest mean service time. If the mean of the arrival distribution is fixed, then loss probability<br />is minimized by deterministic arrival distributionSpringerIranian Journal of Science and Technology (Sciences)1028-627631220070811STEINER FORMULA AND HOLDITCH-TYPE THEOREMS FOR HOMOTHETIC LORENTZIAN MOTIONS207212233110.22099/ijsts.2007.2331ENS. YUCEYıldız Technical University, Faculty of Arts and Science, Department of Mathematics, Esenler, 34210,
Istanbul, Turkey,N. KURUOGLUUniversity of Bahcesehir, Faculty of Arts and Science, Department of
Mathematics and Computer Sciences, Besiktas 34100, Istanbul, TurkeyJournal Article20040525The present paper is concerned with the generalization of the Holditch Theorem under oneparameter<br />homothetic motion on Lorentzian planes. In this paper, for the homothetic Lorentzian motion, we<br />expressed the Steiner formula. Furthermore, we present the Holditch-Type Theorems.SpringerIranian Journal of Science and Technology (Sciences)1028-627631220070811A BOUNDARY INTEGRAL MODEL FOR SIMULATING SPILLING BREAKERS213217233210.22099/ijsts.2007.2332ENS. A. AZARMSAFaculty of Marine Sciences, Tarbiat Modares University, Tehran, I. R. of IranJournal Article20050515A boundary integral method is used to simulate spilling breakers. The bottom is also included in<br />the introduced closed boundary and the problem is directly solved in the physical plane. The method has been<br />shown to be remarkably stable, and no numerical instability has occurred in any of the calculations. The<br />results reveal that both the momentum and total energy are almost constant in time during the simulation<br />period. As a result, the breaking process of a spilling breaker is fairly well simulated.