An improved form of the artificial diffusion parameter-X

Artificial diffusion mechanisms used to damp post-shock oscillations or to stabilize the computations contain a factor chi which determines the amount of diffusion provided. This paper suggests an improved procedure which consists of (1) varying chi from point to point depending on the local Courant number and (2) employing a value of local chi sub i which is determined from a monotonicity analysis. Results obtained by employing a locally dependent value of chi are compared with those for a global value of ch

Concepts of Shalya Tantra in Kampo - Japanese system of Traditional Medicine

History of medicine is very fascinating. We can find many traditional systems of medicine developed in different regions and served humans for many centuries before the development of modern medicine. The system developed in India is known as Ayurveda and system developed in Japan is known as Kampo. We can find many similarities in the basic concepts between these systems. Apart from use of internal medicines both the systems have used sharp instruments, Fire etc in the management. Treatment like excision, Incision etc using different sharp instruments comes under a separate branch as Shalya tantra in Ayurveda but there is no independent branch for surgery in Kampo system. There are many similarities in surgical concepts between these two systems. There is a need to develop universal system of alternate medicine by adopting different concepts from these traditional systems

An Adaptive Remeshing Finite Element Method for High-Speed Compressible Flows Using Quadrilateral and Triangular Elements

In this study a new adaptive remeshing method for high speed compressible flow analysis is presented. The method uses quadrilateral elements where possible, and triangles are introduced as needed. The primary goal of this study is to develop a remeshing method which uses both the concepts of unstructured and structured meshes for the finite element analysis to predict accurate aerodynamic heating in problems related to high speed viscous flows. The remeshing method uses a solution based on an old mesh to create a new mesh based on an advancing front technique. In the present implementation, a structured mesh of quadrilaterals is created in the boundary layer and an unstructured mesh consisting of quadrilaterals and triangles is created in the inviscid region. Studies of convergence rates show that for problems with highly localized solution variations, the remeshing approach gives smaller solution errors with fewer unknowns than refinement of uniform, structured meshes. Results for high speed compressible flows show that the remeshing method improves the solution quality significantly without necessarily increasing the number of unknowns in large proportions

Laminar and turbulent flow computations of Type 4 shock-shock interference aerothermal loads using unstructured grids

This report presents computations for the Type 4 shock-shock interference flow under laminar and turbulent conditions using unstructured grids. Mesh adaptation was accomplished by remeshing, refinement, and mesh movement. Two two-equation turbulence models were used to analyze turbulent flows. The mean flow governing equations and the turbulence governing equations are solved in a coupled manner. The solution algorithm and the details pertaining to its implementation on unstructured grids are described. Computations were performed at two different freestream Reynolds numbers at a freestream Mach number of 11. Effects of the variation in the impinging shock location are studied. The comparison of the results in terms of wall heat flux and wall pressure distributions is presented

Ayurvedic Management of Systemic Lupus Erythematosus Overlap Vasculitis vis a vis Vatarakta - A Case Report

Systemic Lupus erythematosus is the classic prototype of multisystem disease of autoimmune origin. SLE may be associated Vasculitis as an overlap syndrome. In this paper, a patient diagnosed as SLE with Vasculitis, which was managed successfully by Ayurveda treatment is discussed. A 39 year old female patient came to hospital with complaint of severe pain and burning sensation in both the legs for two months, associated with ulceration and gangrene of toes of both the legs for the last 15 days. She was diagnosed as SLE overlap vasculitis at a higher medical centre with relevant investigations and advised to go for amputation. As patient was not willing for surgery came to Ayurveda treatment. The condition was diagnosed as disease Vatarakta and treatment was planned accordingly. Treatment was planned by selecting suitable oral medicines, planning suitable Panchakarma procedures along with the ulcer management. Guduchi (Tinospora cordifolia) was the main drug which is used in Rasayana dosage. Patient responded well and we could able to save the limb. Patient was under follow up for more than a year without any complications and relapses

Asymmetric reduction of prochiral ketones by cell-free systems from Alcaligenes eutrophus

A strain of Alcaligenes eutrophus has been isolated from the soil by enrichment culture technique with nerolidol (1), a sesquiterpene alcohol, as the sole source of carbon and energy. Fermentation of nerolidol (1) by this bacterium in a mineral salts medium resulted in the formation of two major metabolites, viz. geranylacetone (2) and an optically active alcohol, (S)-(+)-geranylacetol (3). Nerolidol (1)-induced cells readily transformed 1,2-epoxynerolidol (4) and 1,2-dihydroxynerolidol (5) into geranylacetone (2). These cells also exhibited their ability to carry out stereospecific reduction of 2 into (S)-(+)-geranylacetol (3). Oxygen uptake studies clearly indicated that nerolidol-induced cells oxidized compounds 2, 3, 4, 5 and ethyleneglycol (7). Based on the nature of the metabolites isolated, the ability of nerolidol-induced cells to convert compounds 4 and 5 into geranylacetone (2), and oxygen uptake studies, a pathway for the microbial degradation of nerolidol (1) has been proposed. The proposed pathway envisages the epoxidation of the terminal double bond, opening of the epoxide and cleavage between C-2 and C-3 in a manner similar to the periodate oxidation of cis-diol. The cell-free extract prepared from nerolidol-induced cells readily carried out the asymmetric reduction of compound 2 to an optically active alcohol (3) in the presence of NAD(P)H. The cell-free extract carried out both oxidation and reduction reactions at two different pH values and exhibited wide substrate specificity towards various steroids besides terpenes

Effect of Type of Carbon Matrix on Tribological Properties of C C Aircraft Brake Discs

Four type of Carbon/Carbon (C/C) composite brake discs (A, B, C, D) were manufactured using different process routes, using spun yarn graphitised carbon fabric as reinforcement. These discs were densified with different types of carbon matrices derived from different precursor materials. C/C brake disc of type A is having carbon matrix derived from pitch precursor, type B has a mixture of resin and pitch derived carbon matrices, type C has a combination of resin derived, pyro and pitch derived carbons and type D has pyro and pitch derived carbon matrices. Friction and wear performance of these brake discs were studied by simulating aircraft landing braking energies (normal and over load) corresponding to one interface using disc-on-disc dynamometer. It was found that the type of carbon matrix influences the nature of friction film formed, which in turn affects the wear rate of C/C brake discs. It was also discussed how the matrix characteristics affected the mechanical properties and the friction film formed affect the coefficient of friction of each type of disc

Linguistic representations for fewer-shot relation extraction across domains

Recent work has demonstrated the positive impact of incorporating linguistic representations as additional context and scaffolding on the in-domain performance of several NLP tasks. We extend this work by exploring the impact of linguistic representations on cross-domain performance in a few-shot transfer setting. An important question is whether linguistic representations enhance generalizability by providing features that function as cross-domain pivots. We focus on the task of relation extraction on three datasets of procedural text in two domains, cooking and materials science. Our approach augments a popular transformer-based architecture by alternately incorporating syntactic and semantic graphs constructed by freely available off-the-shelf tools. We examine their utility for enhancing generalization, and investigate whether earlier findings, e.g. that semantic representations can be more helpful than syntactic ones, extend to relation extraction in multiple domains. We find that while the inclusion of these graphs results in significantly higher performance in few-shot transfer, both types of graph exhibit roughly equivalent utility.Comment: ACL 202

A comparative clinical study on Udvartana with Shaileyadi Churna and Yoga Asanas in Sthaulya

Obesity has reached epidemic proportions in India in the 21st century. Sedentary life style and unhealthy food habits being a major causative factors, resulting in many serious systemic complications like Diabetes, Heart disease etc. Udvartana is commonly practiced and this therapy explained to be Kaphahara and Meda Pravilayana property. Asana is the first step of Hatayoga. One should practice Asanas to obtain Sthairya, Arogya and Laghuthva. Sthoulya is one such disease where Asanas are useful in reducing the weight and their complications. A Comparative clinical Study of 40 patients suffering from Sthaulya were selected after thorough history taking, clinical assessment and laboratory investigations. Patients were subjected to Udvartana using in Shaileyadi Churna, Group A and Udvartana with Shaileyadi churna and Asanas in Group B for a period of 14 days where in the procedure was carried out daily for 45 min