Informatics Publishing Limited

D. Anand ¹, Raja ², E. G. Rajan ³

Affiliations
1 Tata Institute of Fundamental Research, Hyderabad, IN
2 JNT University, Hyderabad, IN
3 Indian Institute of Technology (IIT), Kanpur, IN

Abstract

Technological advances made in Network computing, Mobile computing, data transmissions, Sensors and integrated digital technologies for Intelligence, Surveillance and Reconnaissance have led to development of highly advanced battlefield weapons. The pace of the current and future battle is going to be so fast that there will be no time to wait for instructions and advice from the Commanding Officer. Added to this, is the complex nature of wars the defence forces are asked to handle, world over. These factors put together have revolutionized the way the wars are prosecuted. The shift clearly is towards what is commonly called as Network-Centric Warfare (NCW). This paper presents and comments on the concepts, methodologies, prevailing technologies, potential benefits and the challenges faced by NCW in modern warfare. The discussion in the paper is purely theoretical and academic in nature, with an aim to review and provide insight on this emerging field.

Keywords

C2, Course of Action, C4ISR, Speed of Command, Situational Awareness.

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P. Divyabarathi ¹, D. Anand ¹, S. P. Richards ¹, D. S. Chand ²

Affiliations
1 Dept. of Aeronautical Engg., Bharath Institute of Higher Education and Research, Chennai, IN
2 Dept. of Aeronautical Engg., Tagore Engg. College, Chennai, IN

Abstract

This paper details the influence of geometry variation such as shape transition of the isolator from its entry to exit on overall performance of scramjet isolators. The experiments are conducted to assess the performance of two isolator geometries of circle to pentagon and circle to hexagon. The pseudo shock length is obtained for the two cases by observing the sudden pressure rise in pressure plots taken along the wall. It is found that the shock train length is shorter for circular to pentagon duct compared with the other duct. Hence, this duct is preferable in order to prevent inlet non-start induced by the pressure rise in the combustion chamber.

Keywords

Scramjet Isolator, Shape, Shock Train, Pressure, Performance, Efficiency.

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D. Anand ¹, B. Suneel Kumar ¹, Devendra Ojha ²

Affiliations
1 TIFR Balloon Facility, ECIL Post, Hyderabad 500 062, IN
2 Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, IN

Abstract

High-altitude scientific balloons offer unique opportunities to carry scientific payloads to stratospheric altitudes at a cost several orders of magnitude lower than the corresponding satellite missions. Balloon-borne payloads are easy to implement allowing quick experiment turn-around times and inexpensive reflights can be conducted as the payload is recovered most of the times. In addition, in situ and high-resolution spatial and temporal measurements of the earth’s atmosphere can be made that might not be feasible with satellites. They are also used as a testbed to prove technologies for future satellite missions. Scientific ballooning was initiated at the Tata Institute of Fundamental Research (TIFR), Mumbai in 1945, when scientific instruments were flown to stratospheric altitudes using a cluster of weather balloons for cosmic-ray research. The need to have balloons float at constant stratospheric altitudes for studies in astronomy led to the initiation of work on the design and fabrication of zero-pressure polyethylene (ZP) balloons at TIFR in 1956. Since then, several ZP balloon flights have been conducted for studies in astronomy, atmospheric science, astrobiology, balloon technology and space technology development, leading to several important scientific results. In 2018, the TIFR balloon programme crossed an important milestone of conducting more than 500 ZP balloon flights. This article presents recent advancements made in some areas of scientific ballooning and details of balloon experiments conducted in the past two decades.

Keywords

Cold Brittle Point, Gore, Satellite Missions, Scientific Payloads, Stratospheric Altitudes, Zero-Pressure Balloon.

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D. Anand ¹, M. Sathish ¹

Affiliations
1 Department of Pharmaceutical Chemistry, College of Pharmacy, Madras Medical College, Chennai 3., IN

Abstract

The antidiabetic activity of n–butanol fraction of Albizia Procera was evaluated in Streptozotocin induced diabetic rats. The n–butanol fraction of Albizia Procera (200 and 400 mg/kg) were administered to Streptozotocin induced diabetic rats for 14 days and blood glucose levels (BGLs) of the diabetic rats were monitored at intervals of hours and days throughout the duration of the treatment. The n-butanol fraction of Albizia procera was found to be non-toxic up to the dose of 2000mg/kg and did not cause any death of the tested animals. STZ induced rats significantly increase the blood glucose level as compared to other groups. N- butanol fraction produces dose dependent effect as the high dose (400mg/kg) shows more significant antidiabetic action compared to 200mg/kg (P< 0.01).These results suggest that the N – Butanol fraction of Albizia Procera possess antidiabetic effect on Streptozotocin -induced diabetic rats and this justifies its use in ethno medicine and can be exploited in the management of diabetes.

Keywords

Antidiabetic, Albizia Procera, Streptozotocin, n – butanol, Blood glucose.

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