@Article{ALP2008,
author="ALP, M.",
title="PULLBACK CROSSED MODULES OF ALGEBROIDS",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="1-5",
abstract="In this paper, we present algebroids and crossed modules of algebroids. We also define pullbackcrossed module of algebroids.",
issn="1028-6276",
doi="10.22099/ijsts.2008.2234",
url="http://ijsts.shirazu.ac.ir/article_2234.html"
}
@Article{KABOLI2008,
author="KABOLI, Sh
and ZOLGHADRI, M. R.
and HAGHBIN, S.
and ESKANDARI, P.",
title="INVESTIGATION ON THE FLUX-BASED TORQUE-RIPPLE BEHAVIOR IN DTC BASED INDUCTION MOTOR DRIVES",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="7-16",
abstract="The efficiency of induction motors decreases at light loads. Efficiency optimizer control systemsadjust the motor flux value to achieve the best efficiency in a wide range of load variations. Reduced fluxoperation has some other benefits such as power factor improvement and torque ripple reduction. The latter isan important issue in a direct torque controlled induction motor drive. In this paper, the effect of fluxreference value on the torque ripple of a direct torque controlled induction motor is analyzed. The effect offlux value on torque ripple in a wide range of speed variations is investigated. Simulation and theexperimental results presented justify the validity of the theoretical analysis about torque ripple.",
issn="1028-6276",
doi="10.22099/ijsts.2008.2235",
url="http://ijsts.shirazu.ac.ir/article_2235.html"
}
@Article{BIDABAD2008,
author="BIDABAD, B.
and HEDAYATIAN, S.",
title="CAPACITY ON FINSLER SPACES",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="17-24",
abstract="Here, the concept of electric capacity on Finsler spaces is introduced and the fundamentalconformal invariant property is proved, i.e. the capacity of a compact set on a connected non-compact Finslermanifold is conformal invariant. This work enables mathematicians and theoretical physicists to become morefamiliar with the global Finsler geometry and one of its new applications.",
issn="1028-6276",
doi="10.22099/ijsts.2008.2237",
url="http://ijsts.shirazu.ac.ir/article_2237.html"
}
@Article{KAZAZ2008,
author="KAZAZ, M.
and UGURLU, H. H.
and OZDEMIR, A.",
title="INTEGRAL CHARACTERIZATIONS FOR TIMELIKE AND SPACELIKE CURVES ON THE LORENTZIAN SPHERE 3 S1",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="25-31",
abstract="V. Dannon showed that spherical curves in E4 can be given by Frenet-like equations, and he thengave an integral characterization for spherical curves in E4 . In this paper, Lorentzian spherical timelike andspacelike curves in the space time 41 R are shown to be given by Frenet-like equations of timelike andspacelike curves in the Euclidean space E3 and the Minkowski 3-space 31 R . Thus, finding an integralcharacterization for a Lorentzian spherical 41 R -timelike and spacelike curve is identical to finding it for E3curves and 31 R -timelike and spacelike curves. In the case of E3 curves, the integral characterizationcoincides with Dannon’s.Let {T, N, B}be the moving Frenet frame along the curve α (s) in the Minkowski space 31 R . Letα (s) be a unit speed C4 -timelike (or spacelike) curve in 31 R so that α '(s) = T . Then, α (s) is a Frenetcurve with curvature κ (s) and torsion τ (s) if and only if there are constant vectors a and b so that(i) { [ ] } 0'( ) ( ) cos ( ) sin ( ) cos ( ) ( ) ( ) ( ) , s T s =κ s a ξ s + b ξ s + ∫ ξ s −ξ δ T δ κ δ dδ T is timelike,(ii) { ( ) } 0'( ) ( ) cosh ( ) ( ) ( ) ( ) s T s =κ s aeξ +be−ξ + ∫ ξ s −ξ δ T δ κ δ dδ , N is timelike,where0( ) ( ) . s ξ s = ∫ τ δ dδ",
issn="1028-6276",
doi="10.22099/ijsts.2008.2238",
url="http://ijsts.shirazu.ac.ir/article_2238.html"
}
@Article{SHAFIEIDEHABAD2008,
author="SHAFIEI DEH ABAD, A.",
title="DIRAC STRUCTURES",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="33-44",
abstract="In this paper we introduce the concept of Dirac structures on (Hermitian) modules and vectorbundles and deduce some of their properties. Among other things we prove that there is a one to onecorrespondence between the set of all Dirac structures on a (Hermitian) module and the group of allautomorphisms of the module. This correspondence enables us to represent Dirac structures on (Hermitian)modules and on vector bundles in a very suitable form and define induced Dirac structures in a natural way.",
issn="1028-6276",
doi="10.22099/ijsts.2008.2239",
url="http://ijsts.shirazu.ac.ir/article_2239.html"
}
@Article{TAHAMTANI2008,
author="TAHAMTANI, F.",
title="ON ENERGY DECAY OF AN N-DIMENSIONAL THERMOELASTICITY SYSTEM WITH A NONLINEAR WEAK DAMPING",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="45-51",
abstract="We study the exponential decay of global solution for an n-dimensional thermo-elasticity systemin a bounded domain of ℜn . By using the multiplier technique and constructing an energy functional welladapted to the system, the exponential decay is proved.",
issn="1028-6276",
doi="10.22099/ijsts.2008.2240",
url="http://ijsts.shirazu.ac.ir/article_2240.html"
}
@Article{PEYGHAN2008,
author="PEYGHAN, E.
and RAZAVI, A.
and HEYDARI, A.",
title="CONFORMAL VECTOR FIELDS ON TANGENT BUNDLE WITH A SPECIAL LIFT FINSLER METRIC*",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="53-59",
abstract="On a Finsler manifold, we define conformal vector fields and their complete lifts and prove that incertain conditions they are homothetic.",
issn="1028-6276",
doi="10.22099/ijsts.2008.2242",
url="http://ijsts.shirazu.ac.ir/article_2242.html"
}
@Article{ALIZADEH2008,
author="ALIZADEH, R.
and ESSLAMZADEH, H.",
title="THE STRUCTURE OF DERIVATIONS FROM A FULL MATRIX ALGEBRA INTO ITS DUAL",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="61-64",
abstract="Let A be a unital algebra over a field of characteristic zero. We show that every derivation from( ) n M A into its dual ( ) n M A ∗ is the sum of an inner derivation and a derivation induced by a derivationfrom A into A∗",
issn="1028-6276",
doi="10.22099/ijsts.2008.2243",
url="http://ijsts.shirazu.ac.ir/article_2243.html"
}
@Article{HAGHNEJADAZAR2008,
author="HAGHNEJAD AZAR, K.
and RIAZI, A.",
title="α − SEPARABLE AND O-TOPOLOGICAL GROUP",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="65-70",
abstract="We introduce some new concepts of topological spaces which say α − separable topologicalspace and O-topological group, α − first axiom, α − second axiom, and we find some relations betweenthem with some applications in normed spaces.",
issn="1028-6276",
doi="10.22099/ijsts.2008.2244",
url="http://ijsts.shirazu.ac.ir/article_2244.html"
}
@Article{BEHBOODIAN2008,
author="BEHBOODIAN, J.
and ASGHARZADEH, A.",
title="ON THE DISTRIBUTION OF Z-SCORES",
journal="Iranian Journal of Science and Technology (Sciences)",
year="2008",
volume="32",
number="1",
pages="71-78",
abstract="Let X ,..., Xn 1 be a random sample from a distribution with sample mean X and samplevariance S 2. In this paper we consider certain very general properties of the so-called “Z-scores”X X S i n i ( − )/ : = 1,...., . A representation theorem is then given for Z-scores obtained from an underlyingnormal population, together with a theorem for their limiting distribution as the sample size tends to infinity.Finally, two applications involving grading and testing for an outlier are presented.",
issn="1028-6276",
doi="10.22099/ijsts.2008.2245",
url="http://ijsts.shirazu.ac.ir/article_2245.html"
}