Springer
Iranian Journal of Science and Technology (Sciences)
1028-6276
33
2
2009
06
11
INEQUALITIES FOR MEROMORPHICALLY P-VALENT FUNCTIONS
139
143
EN
A.
EBADIAN
Department of Mathematics, Faculty of Science, Urmia University, Urmia, I. R. of Iran
a.ebadian@urmia.ac.ir
SH.
NAJAFZADEH
Department of Mathematics, University of Maragheh, Maragheh, I. R. of Iran
10.22099/ijsts.2009.2209
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
http://ijsts.shirazu.ac.ir/article_2209.html
http://ijsts.shirazu.ac.ir/article_2209_9f1c9605d6234b994a3831b7f52d53ce.pdf
Springer
Iranian Journal of Science and Technology (Sciences)
1028-6276
33
2
2009
06
11
N-ARY POLYGROUPS
145
158
EN
M.
GHADIRI
Department of Mathematics, Yazd University, Yazd, I. R. of Iran
mghadiri@yazduni.ac.ir
B. N.
WAPHARE
Department of Mathematics, University of Pune, Pune, India
10.22099/ijsts.2009.2210
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
http://ijsts.shirazu.ac.ir/article_2210.html
http://ijsts.shirazu.ac.ir/article_2210_33be221c3bf789b5deb0c97fadd69fe8.pdf
Springer
Iranian Journal of Science and Technology (Sciences)
1028-6276
33
2
2009
06
11
1-TYPE AND BIHARMONIC FRENET CURVES IN LORENTZIAN 3-SPACE
159
168
EN
H.
KOCAYIGIT
Celal Bayar University, Faculty of Science and Arts Department of Mathematics
Muradiye Campus, Muradiye, Manisa, Turkey
huseyin.kocayigit@bayar.edu.tr
H. H.
HACISALIHOGLU
Ankara University, Faculty of Science, Department of Mathematics, Tandogan, Ankara, Turkey
10.22099/ijsts.2009.2211
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
http://ijsts.shirazu.ac.ir/article_2211.html
http://ijsts.shirazu.ac.ir/article_2211_9752964b343a95c33b6aa4fbc6118beb.pdf
Springer
Iranian Journal of Science and Technology (Sciences)
1028-6276
33
2
2009
06
11
ALMOST CONVERGENCE THROUGH THE GENERALIZED DE LA VALLÉE-POUSSIN MEAN
169
177
EN
M.
MURSALEEN
Department of Mathematics, Aligarh Muslim University, Aligarh 202002, India
mursaleenm@gmail.com
A. M.
JARRAH
Department of Mathematics, Yarmouk University, Irbid, Jordan
S. A.
MOHIUDDINE
Department of Mathematics, Aligarh Muslim University, Aligarh 202002, India
10.22099/ijsts.2009.2212
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
http://ijsts.shirazu.ac.ir/article_2212.html
http://ijsts.shirazu.ac.ir/article_2212_d1e55ec4c0da81e23f83a7453123ef25.pdf
Springer
Iranian Journal of Science and Technology (Sciences)
1028-6276
33
2
2009
06
11
ON A SPECIAL CLASS OF FINSLER METRICS
179
186
EN
A.
TAYEBI
Department of Mathematics and Computer Science, Qom University, Qom, I. R. of Iran
E.
PEYGHAN
Department of Mathematics, Faculty of Science, Arak University, Arak, I. R. of Iran
epeyghan@gmail.com
10.22099/ijsts.2009.2213
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
http://ijsts.shirazu.ac.ir/article_2213.html
http://ijsts.shirazu.ac.ir/article_2213_2031af62a001b9946fc1cedeeb4112da.pdf
Springer
Iranian Journal of Science and Technology (Sciences)
1028-6276
33
2
2009
06
11
A CLASS OF LIFT METRICS ON FINSLER MANIFOLDS
187
194
EN
E.
PEYGHAN
Department of Mathematics and Computer Science, Arak University, Arak, I. R. of Iran
e-peyghan@araku.ac.ir,
A.
TAYEBI
Department of Mathematics, Faculty of Science, Qom University, Qom, I. R. of Iran
akbar.tayebi@gmail.com
10.22099/ijsts.2009.2214
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
http://ijsts.shirazu.ac.ir/article_2214.html
http://ijsts.shirazu.ac.ir/article_2214_0dccc75738900c9463fd320add2681f7.pdf
Springer
Iranian Journal of Science and Technology (Sciences)
1028-6276
33
2
2009
06
11
THE INVOLUTE-EVOLUTE OFFSETS OF RULED SURFACES
195
201
EN
E.
KASAP
Ondokuz Mayis University, Science and Arts Faculty, Department of Mathematics,
Kurupelit 55139, Samsun, Turkey
S.
YUCE
Yıldız Technical University, Faculty of Arts and Science, Department of Mathematics,
Esenler, 34210, Istanbul, Turkey
sayuce@yildiz.edu.tr
N.
KURUOGLU
University of Bahcesehir, Faculty of Arts and Science, Department of Mathematics and Computer
Sciences, Besiktas, 34100, Istanbul, Turkey
10.22099/ijsts.2009.2215
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
http://ijsts.shirazu.ac.ir/article_2215.html
http://ijsts.shirazu.ac.ir/article_2215_cee2e898ba7eb173d0f2d4497189f574.pdf
Springer
Iranian Journal of Science and Technology (Sciences)
1028-6276
33
2
2009
06
11
DESIGN AND CONSTRUCTION OF A HIGH PRECISION TAC
203
211
EN
F.
ESFANDI
Radiation Application Group, Faculty of Nuclear Engineering, Shahid Beheshti University,
Tehran, I. R. of Iran, Post Box No. 19839631130211
M.
SHAHRIARI
Radiation Application Group, Faculty of Nuclear Engineering, Shahid Beheshti University,
Tehran, I. R. of Iran, Post Box No. 19839631130211
F.
ABBASI DAVANI
Radiation Application Group, Faculty of Nuclear Engineering, Shahid Beheshti University,
Tehran, I. R. of Iran, Post Box No. 19839631130211
fabbasi@sbu.ac.ir
A.
SHARGHI IDO
Shahid Beheshti University, Incubator Center of Technology Units, Tehran, I. R. of Iran
10.22099/ijsts.2009.2216
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
http://ijsts.shirazu.ac.ir/article_2216.html
http://ijsts.shirazu.ac.ir/article_2216_656b93a985618eee10003218bed10455.pdf