Ionut Constandache

Email: ionut [at] cs [dot] duke [dot] edu Office: D307 LSRC, 214 Hudson Hall Office Phone: (919) 660-6599 Computer Science Department Duke University

Research   Work Experience

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I am a PhD candidate in the Department of Computer Science at Duke University. I am working under the supervision of Professor Romit Roy Choudhury. I earned my Bachelor of Science degree in Computer Science from University Politehnica of Bucharest, Romania, in September 2005.
I joined Duke University in Fall 2006.

CV: pdf Last Updated July 2009

Research

Interests

My broad research interests lie in mobile computing, sensor networks, distributed systems and operating systems. More specifically, I am looking into mobile phone localization, opportunistic sensing, context awareness, energy-efficiency, automatic shared-resource configuration and provisioning, and virtualization technologies.

Publications

• CompAcc: Using Mobile Phone Compasses and Accelerometers for Localization by Ionut Constandache, Romit Roy Choudhury and Injong Rhee. To appear in IEEE INFOCOM 2010, San Diego, California, USA, March 2010.
• SurroundSense: Mobile Phone Localization Via Ambience Fingerprinting by Martin Azizyan, Ionut Constandache and Romit Roy Choudhury. In ACM MobiCom 2009, Beijing, China, September 2009. [slides PDF]
  In the media: Yahoo News, Scientific American, ScienceDaily, Duke News.
• PhonePoint Pen: Using Mobile Phones to Write in Air by Sandip Agrawal, Ionut Constandache, Shravan Gaonkar and Romit Roy Choudhury. In MobiHeld 2009 workshop in conjunction with ACM SIGCOMM 2009, Barcelona, Spain, August 2009.
  In the media: Slashdot, Scientific American, ScienceDaily, Engadget, Duke News, Duke Today, YouTube.
• EnLoc: Energy Efficient Localization for Mobile Phones by Ionut Constandache, Shravan Gaonkar, Matt Sayler, Romit Roy Choudhury and Landon Cox. In IEEE INFOCOM 2009 (Mini), Rio de Janeiro, Brazil, April 2009. [slides PDF]
  An extended version of this work was published as an invited paper in Mobicase 2009, San Diego, California, USA, October 2009.
  A poster was presented in MobiSys 2008, Breckenridge, Colorado, USA.
• Secure Control of Portable Images in a Virtual Computing Utility by Ionut Constandache, Aydan Yumerefendi and Jeff Chase.
  In VMSec 2008 workshop in conjunction with ACM CCS 2008, Alexandria, Virginia, USA, October 2008. [slides PDF]
• Policy-driven Negotiation for Authorization in the Grid by Ionut Constandache, Daniel Olmedilla, and Frank Siebenlist.
  In IEEE POLICY 2007, Bologna, Italy, June 2007.

Projects

• Micro-Blog: a virtual information telescope using mobile phones and social participation
  • Energy-Efficient Localization Using Mobile Phones: Localization solution that multiplexes between different localization sensors (GPS, WIFI and GSM) to maximize location accuracy for a given energy budget. The project investigates how mobility profiles and additional sensors (e.g. accelerometers) can be used to improve location accuracy.
• ORCA: a system for dynamic on-demand provisioning of shared networked resources.
  • Secure Control of Portable Images: protocols for mutual authentication and secure key exchange between a virtual machine instantiated from a portable image (e.g. a generic virtual appliances with no keys wired in) and the machine's authorized controller (either a virtual computing utility or the VM owner).
  • Node Agent: web service alowing remote programmatic control and post-install of drivers and software packages in a virtual machine(VM).
• COPSE: a mobile computing testbed
  • VirtualWifi: Xen DOM U device driver allowing wireless network card configuration commands to be pushed and executed in Dom0.

Graduate Coursework

CPS210 Operating Systems
CPS212 Distributed Information Systems
CPS214 Computer Networks
CPS220 Advanced Computer Architecture
CPS230 Advanced Algorithms
CPS271 Machine Learning
ECE255 Performance, Reliability and Availability Modeling of Computer Systems
CPS215 Wireless Networking and Mobile Computing
CPS296.2 Emerging Mobile and Distributed Systems
ECE299.5 Discrete Optimization