JAEM 2019, Vol 9, No 3 koleksiyonunu içerir. http://belgelik.isikun.edu.tr/xmlui/handleiubelgelik/2407 2026-04-15T12:33:19Z 2026-04-15T12:33:19Z Demiray, Hilmi http://belgelik.isikun.edu.tr/xmlui/handleiubelgelik/6047 2024-07-18T10:14:55Z 2019-07-01T00:00:00Z

Modulational instability of three dimensional waves in a plasma with vortex electron distribution Demiray, Hilmi In the present work, employing the three dimensional equations of a plasma composed of a cold electron fluid, hot electrons obeying a trapped / vortex-like distribution, and stationary ions, we study the amplitude modulation of an electron-acoustic waves by use of the conventional reductive perturbation method. Employing the field equations with fractional power type of nonlinearity, we obtained the three dimensional form of the modified nonlinear Schrodinger equation as the evolution equation of the same order of nonlinearity. The modulational instability of the homogeneous harmonic solution is investigated and the criteria for the instability is discussed as a function of the obliqueness angle. The numerical calculations show that the critical value of the wave number of the envelop wave increases with the wave number k of the carrier wave and the obliqueness angle gamma.

2019-07-01T00:00:00Z Kowsalya, Venkatesan Vivin, Joseph Vernold Kumar, S. Vimal http://belgelik.isikun.edu.tr/xmlui/handleiubelgelik/2760 2024-05-07T21:36:16Z 2019-01-01T00:00:00Z

On star chromatic number of prism graph families Kowsalya, Venkatesan; Vivin, Joseph Vernold; Kumar, S. Vimal In this paper, we find the star chromatic number ?s for the central graph of prism graph C(Yn), line graph of prism graph L(Yn), middle graph of prism graph M(Yn) and the total graph of prism graph T(Yn) for all n ? 3.

2019-01-01T00:00:00Z Swaminathan, Venkatasubramanian Praba, Venkatrengan http://belgelik.isikun.edu.tr/xmlui/handleiubelgelik/2759 2024-05-07T21:36:16Z 2019-01-01T00:00:00Z

Global color class domination partition of a graph Swaminathan, Venkatasubramanian; Praba, Venkatrengan Color class domination partition was suggested by E. Sampathkumar and it was studied in [1]. A proper color partition of a finite, simple graph G is called a color class domination partition (or cd-partition) if every color class is dominated by a vertex. This concept is different from dominator color partition introduced in [[2], [3]] where every vertex dominates a color class. Suppose G has no full degree vertex (that is, a vertex which is adjacent with every other vertex of the graph). Then a color class may be independent from a vertex outside the class. This leads to Global Color Class Domination Partition. A proper color partition of G is called a Global Color Class Domination Partition if every color class is dominated by a vertex and each color class is independent of a vertex outside the class. The minimum cardinality of a Global Color Class Domination Partition is called the Global Color Class Domination Partition Number of G and is denoted by Xgcd(G). In this paper a study of this new parameter is initiated and its relationships with other parameters are investigated.

2019-01-01T00:00:00Z Lokesha, Veerebradiah Yasmeen, K. Zeba http://belgelik.isikun.edu.tr/xmlui/handleiubelgelik/2758 2024-05-07T21:36:16Z 2019-01-01T00:00:00Z

SK indices, forgotten topological indices and Hyper Zagreb index of Q operator of carbon nanocone Lokesha, Veerebradiah; Yasmeen, K. Zeba Carbon nanocones are conical structures made from carbon and they have one dimension of order one micrometer. The physical features of these structures can be easily understood by exploiting topological indices. In this article we established SK, F, S and Hyper Zagreb index of carbon nanocones using Q(G) operator. Second author is thankful to University Grant Commission UGC, New Delhi for providing Maulana Azad National Fellowship (F ileNo : F1−17.1/2017−18/MANF −2017−18−KAR−77292) to carry out the present research work.

2019-01-01T00:00:00Z