Effect of Hall Current, Thermal Radiation, Dissipation and Chemical Reaction on Hydromagnetic Non-Darcy Mixed Convective Heat and Mass Transfer Flow Past a Stretching Sheet in the Presence of Heat Sources

We study the combined influence of Hall current, radiation  and dissipation on convective heat and mass transfer flow of a viscous electrically conducting g fluid past a stretching sheet. The equations governing the flow , heat and mass transfer have been solved by Galerkin finite element analysis with three nodded line segments. The velocity, temperature and concentration have been analysed for different values of m, N, F, g, Ec  and Q. The rate of heat and mass transfer on the plate has been evaluated numerically for different variations

CLINICAL EVALUATION OF ROLE OF PACHANA CHIKITSA W.S.R. TO ASRIGDARA

Various reports suggest that 30 to 50% of women in the reproductive age group suffer from excessive and irregular uterine bleeding by various causative factors. Various treatments prescribed in modern medicine like hormone therapy, antiprostaglandins and antifibrinolytic agents etc have not proved their definite efficacy inspite of high price and side effect, and lastly hysterectomy may lead to hormonal imbalance and psychological upset in young fertile women. Ayurveda considered the same as Asrigdara and Stambhana Chikitsa is the commonly prescribed management for this. But prior to Stambhana Chikitsa, Pachana Chikitsa is to be performed as without Amapachana, Stambhana Chikitsamay not show better efficacy. So a clinical trial was conducted on 30 Patients, who were divided in 2 groups, 15 patients in each. In Group A (Control group) Stambhana Chikitsa alone with Panchavalkala Kashaya was given and in Group B (Trial group) Stambhana Chikitsawith Panchavalkala Kashaya proceeded by Pachana Chikitsa with Guduchyadi Kashaya was given to patients for treatment. The present Study reveals, significant benefit in trial group to reduce symptoms of Asrigdara with a p-value of <0.001 in comparison with alone Stambhana Chikitsa

SIGNIFICANCE OF USING UPAMANA PRAMANA IN AYURVEDA

Ayurveda, the ancient Medico Holistic Science, which is comprised of numerous fundamental concepts with basic doctrines. Ayurveda along with its concepts is eternal (Shaswata), and have their own identity which does not require other science to indulge in between. Such fundamental concepts are literally better understood, analyzed and merely utilized in clinical practice only with the proper utility of Pramanas. Pramanas in Ayurveda are means of true knowledge. Acharya Sushruta describe four Pramanas and among the four Pramanas i.e. Pratyaksha (Direct perception), Agama (Teaching of scriptures), Anumama (Inference), Upamana (Analogy). Upamana Pramana is used widely in Ayurvedic literatures. Upamana is having its own importance. Upamana or Aupamya give the knowledge or idea of an object by similar comparison. Acharya Charaka has not included Upamana Pramana under Pramanas but he described it under Vada Marga i.e. technical terms used in Sambasha by Vaidya-Samuha and ultimately helps in attaining valid knowledge, but more than being used in Sambasha, Upamana is having its clinical utility. Upamanas are the analogies or similes that bridge the known to the unknown and after the conceptual system of existing knowledge by modifying and strengthening its associations. Prime intention of such Upamana is incorporating open-ended, forced and visual similes to teach complex concepts and involving students in a creative dynamic though process to enhance understanding of such complex medical concepts. But we have to be very careful about its understanding such analogies, otherwise it may lead to wrong concepts. As said that “An Analogy is like a car, if you take it too far, it breaks downâ€. So here a sincere effort has been made to evaluate and analyze the Upamana Pramana in a simple way in three aspects i.e., physiological, diagnostic, philosophical aspects.

SPT0346-52: Negligible AGN Activity in a Compact, Hyper-starburst Galaxy at z = 5.7

We present Chandra ACIS-S and ATCA radio continuum observations of the strongly lensed dusty, star-forming galaxy SPT-S J034640-5204.9 (hereafter SPT0346-52) at $z$ = 5.656. This galaxy has also been observed with ALMA, HST, Spitzer, Herschel, APEX, and the VLT. Previous observations indicate that if the infrared (IR) emission is driven by star formation, then the inferred lensing-corrected star formation rate ($\sim$ 4500 M_{\sun} yr$^{-1}$) and star formation rate surface density $\Sigma_{\rm SFR}$ ($\sim$ 2000 M_{\sun} {yr^{-1}} {kpc^{-2}}) are both exceptionally high. It remained unclear from the previous data, however, whether a central active galactic nucleus (AGN) contributes appreciably to the IR luminosity. The {\it Chandra} upper limit shows that SPT0346-52 is consistent with being star-formation dominated in the X-ray, and any AGN contribution to the IR emission is negligible. The ATCA radio continuum upper limits are also consistent with the FIR-to-radio correlation for star-forming galaxies with no indication of an additional AGN contribution. The observed prodigious intrinsic IR luminosity of (3.6 $\pm$ 0.3) $\times$ 10$^{13}$ L_{\sun} originates almost solely from vigorous star formation activity. With an intrinsic source size of 0.61 $\pm$ 0.03 kpc, SPT0346-52 is confirmed to have one of the highest $\Sigma_{SFR}$ of any known galaxy. This high $\Sigma_{SFR}$, which approaches the Eddington limit for a radiation pressure supported starburst, may be explained by a combination of very high star formation efficiency and gas fraction.Comment: 8 pages, 6 figures, accepted for publication in Ap

A massive core for a cluster of galaxies at a redshift of 4.3

Massive galaxy clusters have been found that date to times as early as three billion years after the Big Bang, containing stars that formed at even earlier epochs1,2,3. The high-redshift progenitors of these galaxy clusters—termed ‘protoclusters’—can be identified in cosmological simulations that have the highest overdensities (greater-than-average densities) of dark matter4,5,6. Protoclusters are expected to contain extremely massive galaxies that can be observed as luminous starbursts7. However, recent detections of possible protoclusters hosting such starbursts8,9,10,11 do not support the kind of rapid cluster-core formation expected from simulations12: the structures observed contain only a handful of starbursting galaxies spread throughout a broad region, with poor evidence for eventual collapse into a protocluster. Here we report observations of carbon monoxide and ionized carbon emission from the source SPT2349-56. We find that this source consists of at least 14 gas-rich galaxies, all lying at redshifts of 4.31. We demonstrate that each of these galaxies is forming stars between 50 and 1,000 times more quickly than our own Milky Way, and that all are located within a projected region that is only around 130 kiloparsecs in diameter. This galaxy surface density is more than ten times the average blank-field value (integrated over all redshifts), and more than 1,000 times the average field volume density. The velocity dispersion (approximately 410 kilometres per second) of these galaxies and the enormous gas and star-formation densities suggest that this system represents the core of a cluster of galaxies that was already at an advanced stage of formation when the Universe was only 1.4 billion years old. A comparison with other known protoclusters at high redshifts shows that SPT2349-56 could be building one of the most massive structures in the Universe today

Spiro annulation of cage polycycles via Grignard reaction and ring-closing metathesis as key steps

A simple synthetic strategy to C-2-symmetric bis-spiro-pyrano cage compound 7 involving ring-closing metathesis is reported. The hexacyclic dione 10 was prepared from simple and readily available starting materials such as 1,4-naphthoquinone and cyclopentadiene. The synthesis of an unprecedented octacyclic cage compound through intramolecular Diels-Alder (DA) reaction as a key step is described. The structures of three new cage compounds 7, 12 and 18 were confirmed by single crystal X-ray diffraction studies

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