A Study of starless dark cloud LDN 1570: Distance, Dust properties and Magnetic field geometry

We wish to map the magnetic field geometry and to study the dust properties of the starless cloud, L1570, using multi-wavelength optical polarimetry and photometry of the stars projected on the cloud. We made R-band imaging polarimetry of the stars projected on a cloud, L1570, to trace the magnetic field orientation. We also made multi-wavelength polarimetric and photometric observations to constrain the properties of dust in L1570. We estimated a distance of 394 +/- 70 pc to the cloud using 2MASS JHKs colours. Using the values of the Serkowski parameters namely $\sigma_{1}$, $\bar \epsilon$, {\lambda}max and the position of the stars on near infrared color-color diagram, we identified 13 stars that could possibly have intrinsic polarization and/or rotation in their polarization angles. One star, 2MASS J06075075+1934177, which is a B4Ve spectral type, show the presence of diffuse interstellar bands in the spectrum apart from showing H{\alpha} line in emission. There is an indication for the presence of slightly bigger dust grains towards L1570 on the basis of the dust grain size-indicators such as {\lambda}max and Rv values. The magnetic field lines are found to be parallel to the cloud structures seen in the 250{\mu}m images (also in 8{\mu}m and 12{\mu}m shadow images) of L1570. Based on the magnetic field geometry, the cloud structure and the complex velocity structure, we believe that L1570 is in the process of formation due to the converging flow material mediated by the magnetic field lines. Structure function analysis showed that in the L1570 cloud region the large scale magnetic fields are stronger when compared with the turbulent component of magnetic fields. The estimated magnetic field strengths suggest that the L1570 cloud region is sub-critical and hence could be strongly supported by the magnetic field lines.Comment: 26 pages, 22 figures, and 7 tables; Accepted for its publication in A&

RESEARCH ON AYURVEDA DRUGS TOWARDS THE DRUG DEVELOPMENT FOR PLASMODIUM VIVAX MALARIA

Developing countries are more vulnerable to the Vector borne diseases, than developed countries. Incidence of Malaria is steadily increasing and number of deaths as well; is a serious problem in Africa; every five (20%) childhood deaths are due to the effects of the disease and every 30 seconds a child dies from malaria. The problem of Malaria acquired new dimensions such as resistance of vectors to chemical insecticides and drug resistance in strains of Plasmodium Vivax and Plasmodium Falciparum. These are the serious obstacles in the control of Malaria and hence there is a serious need to develop alternate strategies to control Malaria.Central Council for Research in Ayurvedic Sciences is carrying out clinical trial on different Vector Borne Diseases like Malaria, Filariasis etc since seventies. Trial carried out with herbal and herbo-mineral drugs like AYUSH-64, Saptaparnatwak ghanavati, Guduci satva, Spatika Bhasma, Kiratatiktadi compound, Parijatapatra ghanavati etc. on Plasmodium Vivax Malaria. The present paper deals with the details of those drugs and concludes the best drug for control of Malaria

Design and Simulation of Micro Strip Patch Antennas

Remote innovation is one of the fundamental territories of research in the realm of correspondence frameworks today and an investigation of correspondence frameworks is deficient without a comprehension of the operation and manufacture of radio wires. This was the principle purpose behind our selecting a venture concentrating on this field. The principal assemble concentrated on the manufacture and testing of an opened waveguide omnidirectional recieving wire and a biquad directional radio wire. The second gathering concentrated on the plan and reenactment of fix reception apparatuses (which are generally utilized as a part of cellphones today) with an accentuation on enhancement of a 1.9GHz rectangular probefed fix radio wire. A double band recieving wire and a microstrip encouraged patchantenna, utilized as a part of the correspondence lab were likewise reproduced

Broad Band Optical Polarimetric Study of IC 1805

We present the BVR broad band polarimetric observations of 51 stars belonging to the young open cluster IC 1805. Along with the photometric data from the literature we have modeled and subtracted the foreground dust contribution from the maximum polarization (P_{max}) and colour excess (E_{B-V}). The mean value of the P_max for intracluster medium and the foreground are found to be 5.008 +/-0.005 % and 4.865 +/-0.022 % respectively. Moreover, the mean value of the wavelength of maximum polarization (lambda_{max}) for intracluster medium is 0.541 +/- 0.003 micro m, which is quite similar as the general interstellar medium (ISM). The resulting intracluster dust component is found to have negligible polarization efficiency as compared to interstellar dust. Some of the observed stars in IC 1805 have shown the indication of intrinsic polarization in their measurements.Comment: 8 pages, 7 figures, Accepted for publication in MNRA

Distance, magnetic field and kinematics of a filamentary cloud LDN 1157

LDN 1157, is one of the several clouds situated in the cloud complex, LDN 1147/1158, represents a coma-shaped morphology with a well-collimated bipolar outflow emanating from a Class 0 protostar, LDN 1157-mm. The main goals of this work are (a) to map the inter-cloud magnetic field (ICMF) geometry of the region surrounding LDN 1157 to investigate its relationship with the cloud morphology, with the outflow direction and with the core magnetic field (CMF) geometry inferred from the mm- and sub-mm polarization results from the literature, and (b) to investigate the kinematic structure of the cloud. We carried out R-band polarization observations of the stars projected on the cloud to map the pc-scale magnetic field geometry and made spectroscopic observations of the entire cloud in 12CO, C18O and N2H+ (J=1-0) lines to investigate its kinematic structure. We obtained a distance of 340$\pm$3 pc to the LDN 1147/1158, complex based on the Gaia DR2 parallaxes and proper motion values of the three YSOs associated with the complex. A single filament of $\sim1.2$ pc in length and $\sim0.09$ pc in width is found to run all along the coma-shaped cloud. Based on the relationships between the ICMF, CMF, filament orientations, outflow direction, and the presence of an hour-glass morphology of the magnetic field, it is likely that the magnetic field had played an important role in the star formation process in LDN 1157. Combining the proper motions of the YSOs and the radial velocity of LDN 1147/1158 and another complex LDN 1172/1174 which is situated $\sim2$\dgr~east of it, we found that both the complexes are moving collectively toward the Galactic plane. The filamentary morphology of the east-west segment of LDN 1157 may have formed as a result of mass lost by ablation due to the interaction of the moving cloud with the ambient interstellar medium.Comment: 20 pages, Accepted in Astronomy & Astrophysics, Abstract has been shortened due to word limit in arxi

REVIEW OF RESEARCH ON GYNECOLOGICAL CANCERS IN AYURVEDA – AN UPDATE

In spite of advanced chemotherapy and radiotherapy the term Cancer still induces fear of death in common man. Cancers figure among the leading causes of morbidity and mortality worldwide, with approximately 14 million new cases and 8.2 million cancer related deaths (2012). Generally in the women, the five most common sites of cancer are breast, colorectum, lung, cervix, and stomach. But, the most common types of gynaecologic malignancies are cervical cancer, ovarian cancer, and endometrial (uterus) cancer etc. On par with other cancers, Gynecological cancers also contribute to significant number of deaths. In India alone, among the gynaecological cancers, breast cancer accounts for 21.5% deaths; cervical cancer for 20.7% deaths, ovarian cancer for 6.0% of deaths (World Health Organization - Cancer Country Profiles, 2014).The main goals of a cancer diagnosis and treatment programme are to cure or considerably prolong the life of patients and to ensure the best possible quality of life to cancer survivors. Ayurveda plays a key role in prevention; prolong the life span and improvement of quality of life in cancer. In the direction of prevention of cervical carcinoma, poly-herbal compounds ‘Praneem’ and ‘Basant’ are studied extensively. To improve the quality of life, CCRAS have been initiated trials with coded drug AYUSH-QOL-2C, in non-metastatic breast cancer patients those who are receiving chemotherapy/radio-therapy, at St. Johns medical college, Bangalore, Karnataka. Some other clinical studies are also carried out to see the effect of turmeric as an adjuvant in abroad. Apart from the clinical trials number of single herbal drugs like Haridra, Bhallataka, Ashvagandha etc., and compound herbo-mineral preparations are studied to see their efficacy on different types of gynaecological cancers. In united states of America, clinical trials on arsenic preparations are also carried out. Present article aims to review the usefulness of these drugs in Gynecological cancers and their safety too

CRITICAL REVIEW OF MEDHYA RASAYANA DRUGS MENTIONED IN AYURVEDA - TRADITIONAL INDIAN MEDICINE

Ayurvedic system of medicine has mentioned several medicinal preparations under the category 'Medhya'. By virtue of inducing mental upliftment as major influence several medicinal plants mentioned as 'Rasayana drugs' in Ayurveda are primarily claimed as 'Medhya'. Further there is a special class of Rasayana drugs called 'Medhya Rasayana' which is supposed to be having specific influence on brain functions. Cognitive deficits like memory disorders are found in high prevalence among the aged. In Ayurvedic literature, impairment of memory is mentioned as Smriti bhramsha which occurs due to vitiation of Rajo and Tamo doshas. It has been noted that cognitive functions are thoroughly affected due to stress and other related psychological disorders. It is clearly emphasized that Medha (intellect) and Buddhi (wisdom) deteriorate in these conditions. People's lifestyle also has an additional influence on the intellectual capacity. Several Medhya Rasayana drugs mentioned in Ayurveda have multi-dimensional actions having influence on memory. They not only enhance the intellectual capacity but also rejuvenate the whole system and their pathways.&nbsp