154,256 research outputs found
Book Review: Mukul Sharma, Caste and Nature: Dalits and Environmental Politics
No full textSharma V. Book Review: Mukul Sharma, Caste and Nature: Dalits and Environmental Politics. Jadavpur University journal of sociology. 2020;11(11):219-224
Petrobunus Sharma & Giribet 2011
No full textKey to species of Petrobunus 1 Ocularium armed with a median tubercle (Sharma & Giribet, 2011:119, fig. 11b)............................ P. torosus - Ocularium unarmed.................................................................................... 2 2 Free tergites with conspicuous tubercles (Sharma & Giribet, 2011:116, fig. 7a; 118, fig. 10a)................... P. spinifer - Free tergites with granules or unarmed..................................................................... 3 3 Dorsal scutum or Opisthosomal sternite unarmed in male.......................................... P. hebei sp. nov. - Dorsal scutum or Opisthosomal sternite armed tubercles (Fig. 1) or spines (Sharma & Giribet, 2011:112, fig. 4b) in male... 4 4 Scutal area V and free tergites I and II of male armed with paired enlarged lateral tubercles, opisthosomal sternite 7 of male with two large setose spines............................................................. P. chongqing sp. nov. - Dorsal scutum unmared that of tubercles, opisthosomal sternite 7 of male with four large setose spines..... P. schwendingeriPublished as part of Zhang, Chao, Zhang, Feng & Sharma, Prashant P., 2018, Two new species of Petrobunus from China (Opiliones: Laniatores: Petrobunidae), pp. 51-64 in Zootaxa 4524 (1) on page 52, DOI: 10.11646/zootaxa.4524.1.3, http://zenodo.org/record/261031
Book Review: V. Sharma. 2016. Farm Workers of Punjab
No full text V. Sharma. 2016. Farm Workers of Punjab. New Delhi: LG Publishers Distributors, pp. 230, ₹595. ISBN- 976-93-83723-10-2 </jats:p
Pseudoaspidogaster betwai Agrawal & Sharma 1990
No full text<i>Pseudoaspidogaster betwai</i> Agrawal & Sharma, 1990 <p> <i>Tor</i> <i>tor</i> (Actinopterygii); freshwater; intestine; ORI; India (Asia) (Agrawal & Sharma 1990).</p> <p> Remark: Agrawal & Sharma (1990) established Paraspidogasterinae within Aspidogastridae to accommodate <i>P</i>. <i>betwai</i>. However, Rohde (2002) considered this taxon as synonym of <i>Aspidogaster</i> or <i>Cotylaspis</i>.</p>Published as part of <i>Alves, Philippe V., Vieira, Fabiano M., Santos, Cláudia P., Scholz, Tomáš & Luque, José L., 2015, A Checklist of the Aspidogastrea (Platyhelminthes: Trematoda) of the World, pp. 339-396 in Zootaxa 3918 (3)</i> on page 366, DOI: 10.11646/zootaxa.3918.3.2, <a href="http://zenodo.org/record/241203">http://zenodo.org/record/241203</a>
On the structure and origin of pressure fluctuations in wall turbulence: predictions based on the resolvent analysis
No full textWe generate predictions for the fluctuating pressure field in turbulent pipe flow by re-formulating the resolvent analysis of McKeon & Sharma (2010) in terms of the so-called primitive variables. Under this analysis, the nonlinear convective terms in the Fourier-transformed Navier-Stokes equations are treated as a forcing that is mapped to a velocity and pressure response by the resolvent of the linearized Navier-Stokes operator. At each wavenumber-frequency combination, the turbulent velocity and pressure field are represented by the most-amplified (rank-1) response modes, identified via a singular value decomposition of the resolvent. We show that these rank-1 response modes reconcile many of the key relationships between the velocity field, coherent structure (i.e., hairpin vortices), and the high-amplitude wall-pressure events observed in previous experiment and DNS. A Green’s function representation shows that the pressure fields obtained under this analysis correspond primarily to the fast pressure contribution arising from the linear interaction between the mean shear and the turbulent wall-normal velocity. Recovering the slow pressure requires an explicit treatment of the nonlinear interactions between the Fourier response modes. By considering the velocity and pressure fields associated with the triadically-consistent mode combination studied by Sharma & McKeon (2013), we identify the possibility of an apparent amplitude modulation effect in the pressure field, similar to that observed for the streamwise velocity field. However, unlike the streamwise velocity, for which the large scales of the flow are in phase with the envelope of the small-scale activity close to the wall, we expect there to be a ?/2 phase difference between the large scale wall-pressure and the envelope of the small-scale activity. Finally, we generate spectral predictions based on a rank-1 model assuming broadband forcing across all wavenumber-frequency combinations. Despite the significant simplifying assumptions, this approach reproduces trends observed in previous DNS for the wavenumber spectra of velocity and pressure, and for the scale-dependence of wall-pressure propagation speed
Research productivity of Prof. S.C. Sharma as seen through the Web of Science (WoS)
No full textThis paper analyses the research productivity of Prof. Sharma, the Vice Chancellor of Tumkur University. The data was analyzed based the research papers found in WoS and citation for his research papers. The study reports the research productivity in terms of number of papers published, top journals where Prof. Sharma has published his research findings frequently, author collaborations, institutional collaboration and so on. The study also analyzes the research impact of Prof Sharma, through citations count, h-index and his highly cited papers
Optimization of V-Blast and C-Blast Using Genetic Algorithm
No full textME, ECEDMultiple Input Multiple Output (MIMO) systems have been extensively studied in the context of wireless communications, promising both increased capacity and link level reliability. MIMO systems uses an array of transmit and receive antennas for enormous gains in spectral efficiency by exploiting a rich multipath fading environment.
Following the proposal by Foschini at Bell Labs, a family of architectures emerged for systems employing multiple antenna arrays at transmit and receive end, collectively known as Bell Labs Layered Space-Time (BLAST) architectures. BLAST (Bell Labs Layered Space-Time) is a multiple antenna communication scheme to improve the performance of wireless communication by increasing data rate. This dissertation gives a proposed method to increase the throughput by 10% if we use the combination of V-BLAST and C-BLAST. This dissertation reviews the essential aspects of two of the best known members of the family, namely C-BLAST, V-BLAST. V-BLAST improves the performance at the cost of increased computational complexity. In V-BLAST, instead of jointly detecting all the transmit signals, the detection is done iteratively. At each symbol time, for each subcarrier, it first detects the strongest layer (depending on the channel matrix) and then cancels the effect of this strongest layer from each of the received signals, considered as interference. The detection continues with the strongest remaining layer, and so on.
An extension of the open-loop V-BLAST transmission structure referred to as the closed-loop V-BLAST. The closed-loop V-BLAST differs from the open-loop V-BLAST in respect that there exists a feedback channel that enables the receiver to send to the transmitter the optimized transmit adaptation based on the instantaneous channel realization, which is assumed to be perfectly known at the receiver.
Further, improvement can be done in the performance characteristics like bit error rate , SNR and power allocation for V-BLAST and C-BLAST by using genetic algorithms which based upon creation of top point in the population which reaches an optimum solution by creating a population of points at every iteration. So if genetic algorithm is used, throughput increases and bit error rate decreases. On the other hand if genetic algorithm is not used in combination with V- BLAST then throughput will decrease and
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bit error rate will go high. Finally, discussion of results has been explained in end of the dissertation
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