On exact solutions in multidimensional gravity with antisymmetric forms

This short review deals with a multidimensional gravitational model containing dilatonic scalar fields and antisymmetric forms. The manifold is chosen in the product form. The sigma-model approach and exact solutions are reviewed.Comment: 22 pages, Latex, to be published in Proc. of E. Majorana School on Gravitation and Cosmology (30 April - 10 May 2003, Erice

Dual-layer network representation exploiting information characterization

In this paper, a logical dual-layer representation approach is proposed to facilitate the analysis of directed and weighted complex networks. Unlike the single logical layer structure, which was widely used for the directed and weighted flow graph, the proposed approach replaces the single layer with a dual-layer structure, which introduces a provider layer and a requester layer. The new structure provides the characterization of the nodes by the information, which they provide to and they request from the network. Its features are explained and its implementation and visualization are also detailed. We also design two clustering methods with different strategies respectively, which provide the analysis from different points of view. The effectiveness of the proposed approach is demonstrated using a simplified example. By comparing the graph layout with the conventional directed graph, the new dual-layer representation reveals deeper insight into the complex networks and provides more opportunities for versatile clustering analysis.The National Institute for Health Research (NIHR) under its Programme Grants for Applied Research Programme (Grant Reference Number RP-PG-0310-1004)

Carbohydrate specificity of sea urchin sperm bindin: a cell surface lectin mediating sperm-egg adhesion.

We have examined the carbohydrate specificity of bindin, a sperm protein responsible for the adhesion of sea urchin sperm to eggs, by investigating the interaction of a number of polysaccharides and glycoconjugates with isolated bindin. Several of these polysaccharides inhibit the agglutination of eggs by bindin particles. An egg surface polysaccharide was found to be the most potent inhibitor of bindin-mediated egg agglutination. Fucoidin, a sulfated fucose heteropolysaccharide, was the next most potent inhibitor, followed by the egg jelly fucan, a sulfated fucose homopolysaccharide, and xylan, a beta(1 leads to 4) linked xylose polysaccharide. A wide variety of other polysaccharides and glycoconjugates were found to have no effect on egg agglutination. We also report that isolated bindin has a soluble lectinlike activity which is assayed by agglutination of erythrocytes. The bindin lectin activity is inhibited by the same polysaccharides that inhibit egg agglutination by particulate bindin. This suggests that the egg adhesion activity of bindin is directly related to its lectin activity. We have established that fucoidin binds specifically to bindin particles with a high apparent affinity (Kd = 5.5 X 10(-8) M). The other polysaccharides that inhibit egg agglutination also inhibit the binding of 125I-fucoidin to bindin particles, suggesting that they compete for the same site on bindin. The observation that polysaccharides of different composition and linkage type interact with bindin suggests that the critical structural features required for binding may reside at a higher level of organization. Together, these findings strengthen the hypothesis that sperm-egg adhesion in sea urchins is mediated by a lectin-polysaccharide type of interaction

Mapping the Curricular Structure and Contents of Network Science Courses

As network science has matured as an established field of research, there are already a number of courses on this topic developed and offered at various higher education institutions, often at postgraduate levels. In those courses, instructors adopted different approaches with different focus areas and curricular designs. We collected information about 30 existing network science courses from various online sources, and analyzed the contents of their syllabi or course schedules. The topics and their curricular sequences were extracted from the course syllabi/schedules and represented as a directed weighted graph, which we call the topic network. Community detection in the topic network revealed seven topic clusters, which matched reasonably with the concept list previously generated by students and educators through the Network Literacy initiative. The minimum spanning tree of the topic network revealed typical flows of curricular contents, starting with examples of networks, moving onto random networks and small-world networks, then branching off to various subtopics from there. These results illustrate the current state of consensus formation (including variations and disagreements) among the network science community on what should be taught about networks and how, which may also be informative for K--12 education and informal education.Comment: 17 pages, 11 figures, 2 tables; to appear in Cramer, C. et al. (eds.), Network Science in Education -- Tools and Techniques for Transforming Teaching and Learning (Springer, 2017, in press

Pharmacological and phytochemical study of Haridra in Maharashtra state with special reference to Desh Vichar

Haridra (Curcuma Longa Linn.) has been well documented in Ayurvedic Pharmacopoeias which includes Samhita (treatise), Nighantus (lexicons), Chikitsagrantha (compendia of Ayurveda). It provides a collective information regarding Haridra, its morphological characters, properties and actions, from Nighantu, Samhita, analysis of Haridra rhizome as per Desh Vichar (different geographical conditions). It reveals Haridra actions on Sthaulya (obesity). The article reveals its synonyms, botanical description, pharmacognosy and its different pharmacotherapeutic actions. Indication in various diseases as per Samhitas and Nighantu. Importance of different geographical conditions remains untouched, so an attempt was made for analysis of rhizome from three different regions of Maharashtra and to notice the changes in its percentage of composition

DISEASE REVIEW AND MANAGEMENT OF PITTAJ YONIVYAPAD THROUGH AYURVEDIC CLASSICS

Normally a book of gynecology begins with the description of anatomy of reproductive organs and physiology of menstruation etc. In ayurvedic classic majority of the gynecological disorders have been described under the heading of ‘yoni vyapada’. Almost all of the menstrual abnormalities have been described under yoni vyapad in different  classics. Initially all the classics have given the number of yonivyapad as twenty which includes vataj yoni vyapad, pittaj yoni vyapadand so on. Each abnormality have been described in detail and symptomatic treatment has been given.Yoni Vyapad is a compilation of various disorders of the genital tract ranging from vulva till the uterus. Local infectious conditions like vulvo vaginitis, pelvic inflammatory diseases have also been described. Among the various treatment modalities described for Yoni Vyapad, the emphasis given to SthanikaChikitsa is noteworthly .If woman takes pittakar aaharvihar it will be cause of pitta dushti& it can cause pitta pradhanvyadhi. Symptoms of Pittajyonivyapad hampers  normal activities of woman's life. At present time it is a common problem and its prevalence is increasing, due to occupational overstress, night shifts, changes in life style, junk food etc. The modern management such as antibiotics, NSAID’s etc are not fulfilling the patients goal of healthy life as all the medicines only give symptomatic relief with some side effects.Ayurveda has given number of local as well as general treatment for Pittajyonivaypad. Objective of work is to compile and review classical literature on Pittajyonivyapad and its ayurvedic management

Conceptual study of diet for different Prakriti

n Ayurveda, concept of Prakriti plays an important role in deciding individuals ahara, vihar, achara and parihara following this leads to healthy life. Today society is conscious and always eager to know about the diet and its nutrition, hence they blindly followed the things which they see in newspaper, TV etc. They think that the particular diet has so many qualities which give them better health. But all the food is not for everyone due to different Prakriti according to Ayurveda and also such type of advertisements are general and especially for marketing. One should know the suitability for particular diet towards their body and than after consuming it. Hence knowledge of Prakriti and diet for different Prakriti is very essential. In present era, to evaluate the role of diet and life style in different constitutions (Prakriti) for achieving the health as well as in the manifestation of diseases and after following them to check the changes taking place in health status, and for health stastusthis particular subject has been selected for the present study.so here diet for different Prakriti is given

Relativistic expansion of a magnetized fluid

We study semi-analytical time-dependent solutions of the relativistic magnetohydrodynamic (MHD) equations for the fields and the fluid emerging from a spherical source. We assume uniform expansion of the field and the fluid and a polytropic relation between the density and the pressure of the fluid. The expansion velocity is small near the base but approaches the speed of light at the light sphere where the flux terminates. We find self-consistent solutions for the density and the magnetic flux. The details of the solution depend on the ratio of the toroidal and the poloidal magnetic field, the ratio of the energy carried by the fluid and the electromagnetic field and the maximum velocity it reaches.Comment: 17 pages, 6 figures, accepted by Geophysical and Astrophysical Fluid Dynamic

Pharmaceutical and Analytical Study of Ashwagandha Paak

Avaleha / Paak Kalpana is Upkalpana of Kwatha which is commonly prepared nowadays and useful in various disorders. Because of simple preparation method, better palatability and longer shelf life it is gaining popularity on a large scale. Ashwagandha Paak has been prepared as per reference of Bharat Bhaishajya Ratnakar. After preparation it has been studied for its quality and pharmaceutical parameters

An Internet Portal based on 'Twenty Questions'

An efficient Internet portal should contain a search engine or maybe even a decision support system to supply the user with the information (s)he may be looking for. In this report an intelligent agent is suggested that relates different sites to each other, based on the answers supplied by the users looking for certain information. For this purpose a self-learning system has been made, based on the neural network of the game Twenty Questions, but with a strategy that relates different objects or sites by correlating the list of answers to the questions