An analytic study was conducted on coupled partial differential equations. We formally derived new solitary wave solutions of generalized coupled system of Zakharov-Kuznetsov (ZK) and KdV equations by using modified extended tanh method. The traveling wave solutions for each generalized coupled system of ZK and KdV equations are shown in form of periodic, dark, and bright solitary wave solution...

Graz University of Technology, Institute of Environmental Biotechnology, Petersgasse 12, A6 8010 Graz, Austria; Julius Kühn-Institut (JKI), Messeweg 11, D-38104 Braunschweig, 7 Germany, Kawanda Agricultural Research Institute, National Banana Research Program, 8 Uganda; Makerere University, Department of Agricultural Production, College of 9 Agricultural and Environmental Sciences, Uganda and B...

athir al-din al-abhari has a treatise bibliographies have called “thamani ‘ashra mas’ala fi al-kalam” (i.e., 18 problems in theology) or “al-mas’il” (i.e. the problems), but our findings show that its real name is “tahrir al-dalail fi taqrir al-masa’il” (i.e. the introduction of arguments for the establishment of the problems). the treatise, which is presumably his only writing in kalam, contai...

In a poem entitled “A Letter from Caroline Herschel (17501848),” the poet and novefist Siv Cedering attributes the following to the sister of astronomer William Herschel: I have a way with numbers, so I handle the/necessary reductions and calculations. /1 also plan every night’s observation schedule, for he says my/ intuition helps me turn the telescopeto discover/star cluster after star cluste...

I am a low frequency radio astronomer, not an ionospheric physicist. Therefore, I struggle with the ionosphere and know about it only in the sense of “know thy enemy”. Much of what I say in this note is probably naive from the standpoint of ionospheric physics. Nevertheless, I hope that some of my suggestions may prove to be useful.

We define an enhanced spectral classification scheme for M dwarf stars, and use it to derive spectral classification of 104 northern stars with proper motions larger than 0.5 yr which we discovered in a survey of high proper motion stars at low galactic latitudes. The final tally is as follows: 54 M dwarfs, 25 sdK and sdM subdwarfs, 14 esdK and esdM extreme subdwarfs, and 11 DA and DC white dwa...

The author contends that sex differentials in childhood mortality in Pakistan are a likely outcome of son preference behavior by parents. Consideration is given to the historical improvement in the female disadvantage in mortality, the neglect of female children, gender and class factors, and son preference and high fertility. Data are from the 1981 Pakistan census and other official surveys....

We present a series of statistical tests done to a sample of 29 Seyfert 1 and 59 Seyfert 2 galaxies selected from mostly isotropic properties, their far infrared fluxes and warm infrared colors. Such selection criteria provide a profound advantage over the criteria used by most investigators in the past, such as ultraviolet excess. These tests were done using ground based high resolution VLA A-...

Performance of the Level-2 pipeline, which translates UVIT data created by ISRO's ground segment processing systems (Level-1) into astronomer ready scientific products, is described. This pipeline has evolved significantly from experiences during in orbit mission. With time, detector modules developed certain defects led to occasional corruption imaging and timing data. article will describe im...