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...

Based on a power spectrum analysis of the IRAS ISSA maps, we present the first detection of the Cosmic far-Infrared Background (CIB) fluctuations at 60 and 100 µm. The power spectrum of 12 low cirrus emission regions is characterized by a power excess at spatial frequencies higher than k ∼ 0.02 arcmin −1. Most of this excess is due to noise and to nearby point sources with a flux stronger than ...

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....

Creation of a dominance hierarchy within a population of animals typically involves a period of agonistic activity in which winning and losing decide relative positions in the hierarchy. Among crayfish, fighting between size-matched animals leads to an abrupt change of behavior as the new subordinate retreats and escapes from the attacks and approaches of the dominant (Issa et al., 1999). We us...

3. Side, L, Taylor B, Cayouette M , et al. Homozygous inactivation of the NF1 gene in bone marrow cells from children with neurofibromatosis type 1 and malignant myeloid disorders. N Engl J Med 1997; 336: 1713-20. 4. Matsui I, Tanimura M, Kobayashi N, Sawada T, Nagahara N, Akatsuka J. Neurofibromatosis type 1 and childhood cancer. Cancer 1993; 72:2746-54. 5. Friedman JM, Birch PH. Type 1 neurof...