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Search Results: 1 - 10 of 139767 matches for " K. K. Shukla "
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Heat Pipe for Aerospace Applications—An Overview  [PDF]
K. N. Shukla
Journal of Electronics Cooling and Thermal Control (JECTC) , 2015, DOI: 10.4236/jectc.2015.51001
Abstract: The paper presents an overview of heat pipes, especially those used in different space missions. Historical perspectives, principles of operations, types of heat pipes are discussed. Several factors have contributed to the science and technology of the present state-of-Art heat pipe leading to the development of loop heat pipes, micro and miniature heat pipes and micro loop heat pipes. The paper highlights the advancement of heat pipe for hypersonic cruise vehicles, loop heat pipes with higher conductance in 10 K range, heat pipe switches for temperature control of the spacecraft electronics.
Energy and Throughput Optimized, Cluster Based Hierarchical Routing Algorithm for Heterogeneous Wireless Sensor Networks  [PDF]
Mahanth K Gowda, K. K. Shukla
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2011, DOI: 10.4236/ijcns.2011.45038
Abstract: We propose a novel cluster based distributed routing algorithm in a generalized form for heterogeneous wireless sensor networks. Heterogeneity with respect to number/types of communication interfaces, their data rates and that with respect to energy dissipation model have been exploited for energy and throughput efficiency. The algorithm makes routing assignment optimized for throughput and energy and has a complexity of N/K*logN+k2logk approximately, where N is the number of nodes and k is the number of kcluster heads. Performance experiments confirm the effectiveness of throughput and energy optimizations. The importance of choosing an optimal cluster radius has been shown. The energy consumption in the network scales up well with respect to the network size.
Two pillar iridencleisodialysis with cataract extraction in cataract with glaucoma
Nath K,Shukla B
Indian Journal of Ophthalmology , 1966,
Koch′s cutis: (A case report)
Shukla Bhushan,Sheth K
Indian Journal of Ophthalmology , 1978,
Congenital Bitot spots
Shukla M,Behari K
Indian Journal of Ophthalmology , 1979,
Sclerotinia rot – its prevalence in Indian mustard at different levels of nitrogen
Indian Phytopathology , 2012,
Effec.t of casing soil thickness on crop duration and yield of milky mushroom (Calocybe indica P.&C.)
Indian Phytopathology , 2012,
How Entrepreneurial Firms Prosper while Larger Firms Crumble
P. K. Shukla
International Journal of Business and Management , 2009, DOI: 10.5539/ijbm.v4n3p3
Abstract: Many firms are facing great difficulty surviving the declining financial markets in Fall 2008. As larger firms take drastic measures to control and cut costs while forecasting declining revenue, entrepreneurial firms view the same marketplace in a more positive light. What separate these two types of firms is their differing levels of entrepreneurial intensity. An entrepreneurial grid positions firms upon two dimensions: Frequency of Entrepreneurship and Degree of Entrepreneurship (innovativeness, risk taking, and proactiveness). Just as managers select the placement of their firm on market dimensions such as quality and price, firms need to make a strategic position choice on where they wish their firm to be placed as related to entrepreneurial intensity. The firms listed in a recent article from BusinessWeek magazine titled “The World’s Most Innovative Companies” portrays a higher level of entrepreneurial efforts on both dimensions; firms that would be labeled as revolutionary on the entrepreneurial grid. It would be expected that as consumers expect new and improved products and services to emerge from innovative markets, firms labeled as periodic/incremental would have difficulties in sustaining continual growth. Additionally, firms labeled as continuous or incremental, dynamic, and periodic or discontinuous on the grid would be expected to have moderate success.
Alfvenic tornadoes
P. K. Shukla
Physics , 2012,
Abstract: It is shown that a three-dimensional (3D) modified-kinetic Alfv\'en waves (m-KAWs) can propagate in the form of Alfv\'enic tornadoes characterized by plasma density whirls or magnetic flux ropes carrying orbital angular momentum (OAM). By using the two fluid model, together with Amp\`ere's law, we derive the wave equation for a 3D m-KAWs in a magnetoplasma with $m_e/m_i \ll \beta \ll 1$, where $m_e$ $(m_i)$ is the electron (ion) mass, $\beta =4 \pi n_0 k_B (T_e + T_i)/B_0^2$, $n_0$ the unperturbed plasma number density, $k_B$ the Boltzmann constant, $T_e (T_e)$ the electron (ion) temperature, and $B_0$ the strength of the ambient magnetic field. The 3D m-KAW equation admits solutions in the form of a Laguerre-Gauss (LG) Alfv\'enic vortex beam or Alfv\'enic tornadoes with plasma density whirls that support the dynamics of Alfv\'en magnetic flux ropes.
Twisted Dust Acoustic Waves in Dusty Plasmas
P. K. Shukla
Physics , 2012, DOI: 10.1063/1.4746091
Abstract: We examine linear dust acoustic waves (DAWs) in a dusty plasma with strongly correlated dust grains, and discuss possibility of a twisted DA vortex beam carrying orbital angular momentum (OAM). For our purposes, we use the Boltzmann distributed electron and ion density perturbations, the dust continuity and generalized viscoelastic dust momentum equations, and Poisson's equation to obtain a dispersion relation for the modified DAWs. The effects of the polarization force, strong dust couplings, and dust charge fluctuations on the DAW spectrum are examined. Furthermore, we demonstrate that the DAW can propagate as a twisted vortex beam carrying OAM. A twisted DA vortex structure can trap and transport dust particles in dusty plasmas.
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