2019-02-23T16:05:07Z
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 the<br />punctured 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-ary<br />polygroups is introduced. The concepts of n-ary normal subpolygroups and strong homomorphisms of n-ary<br />polygroups are adopted. With respect to these concepts the isomorphism theorems for n-ary polygroups are<br />stated and proved. Finally, we will consider the fundamental relation * defined on an n-ary polygroup and<br />prove 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 are<br />studied 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 la<br />Vallée-Poussin mean. In this paper, we generalize the notion of almost convergence by using the concept of<br />invariant mean and the generalized de la Vallée-Poussin mean. We determine the bounded linear operators for<br />the 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-reducible<br />metrics. Then we show that every P-reducible generalized Landsberg metric of dimension n 2 must be a<br />Landsberg metric. This implies that on Randers manifolds the notions of generalized Landsberg metric and<br />Berwald 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 Finsler<br />manifolds. We concentrate on the complex and Kählerian and Hermitian structures associated with Finsler<br />manifolds via g-natural metrics. We prove that the almost complex structure induced by this metric is a<br />complex structure on tangent bundle if and only if the Finsler metric is of scalar flag curvature. Then we show<br />that 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 ruled<br />surfaces based on line geometry. Using lines instead of points, two ruled surfaces which are offset in the sense<br />of 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 instruments<br />which has great significance in many fields of science, especially radiation physics. A TAC unit has been<br />designed based on the START-STOP analog method and NIM (Nuclear Instrument Modules) standards. After<br />designing the circuit, it was simulated by PSPICE software and constructed by discrete and integrated<br />components. Accuracy of performance, linearity and time resolution of the TAC were checked in laboratory<br />condition and a neutron-gamma discrimination experiment was carried out using this TAC. Results of these<br />experiments and the spectrum of neutron-gamma discrimination completely agree with those from other<br />similar 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