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AIC Seminar Series

On Narasimha-Sreenivasan numbers in Clop Flow in Cloud Networks & Vehicle Flow in Urban Road networks

Krishnamachar SreenivasanCentral Institute of Technology, Kokrajhar, Assam, India

Notice:  Hosted by Richard Waldinger

Date:  Thursday, April 12th 2018 at 4:00pm

Location:  EK255 (SRI E building)  (Directions)

Join Remotely: 

Talk available over VTC – contact me for more info.

Origin of Dynamical similitude is lost in antiquity. Isaac Newton. Lord Rayleigh, George Stokes were the earliest Europeans and invariant ratios in architecture and sculpture appear in ancient Hindu document, Shilpa Shastra. Mostly they all originate as ratios of speeds, lengths [ex. Mach number, Lawrence time dilation, and velocity wrt speed of light]. Exploding technology compels us to explore new dimensionless numbers, not just ratios but combinations of ratios. Cloud networks are becoming increasingly popular and are attracting end users and research community. A cloud operation, a clop, is akin to flop, floating point operation. A 50-chip island in a 100-island cloud has about hundred trillion transistors. Ensuring proper coordination and cooperation among these transistors is an application with say, a few million lines of code at the user level, hundreds of thousands of code at the kernel level at each island. Thus, we have approximately 1 billion lines of instructions executing in a cloud of 100 trillion transistors, working in consonance across several frequency domains. (Ex., Processor at 2.8 GHz, Bus at 133 MHz and disc rotating at 7800 RPM) Consider vehicle flow in a crowded city. Consider two concurrent flows, from A to B, L miles apart. A vehicle [with finite size, number of riders, single/multiple occupancy, vehicle size. Many destinations, many origins, single arrival/departure, batch arrival/departure, multi-lane roads, fly-overs, US highways] and an Internet Packet [with finite size, many class of objects, satellite, under ocean fibre links, … ] originates from A and arrive at B in time t and T, respectively. Narasimha-Sreenivasan number is defined as the ratio of the two travel times. Talk will elaborate.

   Bio for Krishnamachar Sreenivasan

Krishnamachar Sreenivasan has a Ph.D. from University of Pennsylvania, Philadelphia, Pa. M.Sc. degree, Indian Institute of Science, Bangalore, B.E. degree, (with distinction) University College of Engineering, Bangalore. Research papers have appeared in International J. of Heat and Mass transfer, Transactions of ASME, Comm. Of ACM, Software Practice and Experience. Employers include Indian Institute of Science, Univ. of Pennsylvania, MITRE (a MIT Lab), Stanford Research Institute, General Electric, Ford Aerospace Corporation, Hewlett Packard Inc, Agilent, IIT Guwahati, IIT Mandi, IIT Ropar, a Peace Corps Instructor, St. Paul, Minnesota, teaching Kannada to US volunteers, a Red Cross disaster recovery volunteer in the Bay Area, hosted a weekly Public Service Radio Show [KLOK AM] to help Senior Citizens of mostly but not exclusively of Indian origin, taught Bridge to Senior Citizens in Palo Alto. Member of College Water Polo Team, Table Tennis Champion at IISc, Penn Faculty Squash Team, Corporal, National Cadet Corps, Won Tennis tournaments in Palo Alto, captained the IITG faculty cricket team, a judge at a GLOBAL INTEL Science Competition for High School Students. Letters to Editor appear regularly in the London Financial Times, San Jose Mercury News, The Hindu. ‘Aging in the Silicon Valley’ appeared in INDIA CURRENTS, worked on a IIT Ropar interdisciplinary effort to develop Bio-Digesters to remove human waste in Indian bathrooms, lead a student project to apply distributed computing principles to solve the sugar cane juicing challenges faced by the Punjab Sugar Cane growers, Facebook and Skype enthusiastically but do not text nor twitter, nominated as the ‘most Popular Visiting Professor at IIT Guwahati’. A Bangalorean who arrived in US in 1960, now a US citizen, lives in Palo Alto, with his wife, children and grand children, Elected Area Expert of Global Deecemland a Global (153 Countries) NGO to eradicate Global poverty, write (co-authored with retired IAS officers) on ‘How to solve Poverty induced Indian crisis’, ‘How to improve Rs. 65 == $1?”, “Why is distance learning not for everybody? After all, Chalk is mightier than a Slide”, fluent in Kannada, Tamil, Pig Spanglish, Telugu, English, Cobol, Fortran, C++, Awk.

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