2017-11-22T18:00:08Z
http://ijsts.shirazu.ac.ir/?_action=export&rf=summon&issue=461
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2009
33
2
INEQUALITIES FOR MEROMORPHICALLY P-VALENT FUNCTIONS
A.
EBADIAN
SH.
NAJAFZADEH
The aim of this paper is to prove some inequalities for p-valent meromorphic functions in thepunctured unit disk Δ* and find important corollaries.
p-valent functions
meromorphic starlike function
convex
close-to-convex
2009
06
11
139
143
http://ijsts.shirazu.ac.ir/article_2209_9f1c9605d6234b994a3831b7f52d53ce.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2009
33
2
N-ARY POLYGROUPS
M.
GHADIRI
B. N.
WAPHARE
Polygroups are multivalued systems that satisfy group like axioms. In this paper the class of n-arypolygroups is introduced. The concepts of n-ary normal subpolygroups and strong homomorphisms of n-arypolygroups are adopted. With respect to these concepts the isomorphism theorems for n-ary polygroups arestated and proved. Finally, we will consider the fundamental relation * defined on an n-ary polygroup andprove some results in this respect.
n-ary polygroup
n-ary normal subploygroup
isomorphism theorem
fundamental relation
2009
06
11
145
158
http://ijsts.shirazu.ac.ir/article_2210_33be221c3bf789b5deb0c97fadd69fe8.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2009
33
2
1-TYPE AND BIHARMONIC FRENET CURVES IN LORENTZIAN 3-SPACE
H.
KOCAYIGIT
H. H.
HACISALIHOGLU
1-type and biharmonic curves by using Laplace operator in Lorentzian 3-space arestudied and some theorems and characterizations are given for these curves.
– 1-type curve
biharmonic curve
Helix
degenerate helices
2009
06
11
159
168
http://ijsts.shirazu.ac.ir/article_2211_9752964b343a95c33b6aa4fbc6118beb.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2009
33
2
ALMOST CONVERGENCE THROUGH THE GENERALIZED DE LA VALLÉE-POUSSIN MEAN
M.
MURSALEEN
A. M.
JARRAH
S. A.
MOHIUDDINE
Lorentz characterized the almost convergence through the concept of uniform convergence of de laVallée-Poussin mean. In this paper, we generalize the notion of almost convergence by using the concept ofinvariant mean and the generalized de la Vallée-Poussin mean. We determine the bounded linear operators forthe generalized σ-conservative, σ-regular and σ-coercive matrices.
sequence spaces
invariant mean
matrix transformation
bounded linear operators
2009
06
11
169
177
http://ijsts.shirazu.ac.ir/article_2212_d1e55ec4c0da81e23f83a7453123ef25.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2009
33
2
ON A SPECIAL CLASS OF FINSLER METRICS
A.
TAYEBI
E.
PEYGHAN
In this paper, we study projective Randers change and C-conformal change of P-reduciblemetrics. Then we show that every P-reducible generalized Landsberg metric of dimension n 2 must be aLandsberg metric. This implies that on Randers manifolds the notions of generalized Landsberg metric andBerwald metric are equivalent.
Randers metric
Landsberg metric
Berwald metric
Randers change
C-conformal change
2009
06
11
179
186
http://ijsts.shirazu.ac.ir/article_2213_2031af62a001b9946fc1cedeeb4112da.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2009
33
2
A CLASS OF LIFT METRICS ON FINSLER MANIFOLDS
E.
PEYGHAN
A.
TAYEBI
In this paper, we are going to study the g-natural metrics on the tangent bundle of Finslermanifolds. We concentrate on the complex and Kählerian and Hermitian structures associated with Finslermanifolds via g-natural metrics. We prove that the almost complex structure induced by this metric is acomplex structure on tangent bundle if and only if the Finsler metric is of scalar flag curvature. Then we showthat the complex structure is Hermitian if and only if the Finsler metric is of constant flag curvature.
finsler manifold
G-natural metrics
Kähler structure
2009
06
11
187
194
http://ijsts.shirazu.ac.ir/article_2214_0dccc75738900c9463fd320add2681f7.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2009
33
2
THE INVOLUTE-EVOLUTE OFFSETS OF RULED SURFACES
E.
KASAP
S.
YUCE
N.
KURUOGLU
In this study, a generalization of the theory of involute-evolute curves is presented for ruledsurfaces based on line geometry. Using lines instead of points, two ruled surfaces which are offset in the senseof involute-evolute are defined. Moreover, the found results are clarified using computer-aided examples
Ruled Surface
involute-evolute
differential geometry
2009
06
11
195
201
http://ijsts.shirazu.ac.ir/article_2215_cee2e898ba7eb173d0f2d4497189f574.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2009
33
2
DESIGN AND CONSTRUCTION OF A HIGH PRECISION TAC
F.
ESFANDI
M.
SHAHRIARI
F.
ABBASI DAVANI
A.
SHARGHI IDO
TAC (Time to Amplitude Convertor) is one of the most important time measurement instrumentswhich has great significance in many fields of science, especially radiation physics. A TAC unit has beendesigned based on the START-STOP analog method and NIM (Nuclear Instrument Modules) standards. Afterdesigning the circuit, it was simulated by PSPICE software and constructed by discrete and integratedcomponents. Accuracy of performance, linearity and time resolution of the TAC were checked in laboratorycondition and a neutron-gamma discrimination experiment was carried out using this TAC. Results of theseexperiments and the spectrum of neutron-gamma discrimination completely agree with those from othersimilar TACs, and are, to some extent, better.
Time to Amplitude Converter (TAC)
START-STOP method
Integral Non Linearity (INL)
time
resolution
neutron-gamma discrimination
2009
06
11
203
211
http://ijsts.shirazu.ac.ir/article_2216_656b93a985618eee10003218bed10455.pdf