MS Thesis Defense

A Hybrid CPU/GPU Pipeline Workflow System

Tim Blattner

11:45am Thurday, 25 April 2013, ITE 325b, UMBC

Heterogeneous architectures can be problematic to program on, particularly when trying to schedule tasks on all available compute resources, overlapping PCI express transfers, and managing the limited memory available on the architectures. In this thesis we propose a workflow system that is capable of scheduling on all available compute resources, overlaps PCI express transfers, and manages the limited memory. A procedure for creating the workflow system is described and two case studies are analyzed.

• Image Stitching, which implements the workflow system and achieves two orders of magnitude speedup over an image stitching plugin found in the popular Fiji ImageJ application. Implementing the image stitching algorithm without the workflow system yielded only one order of magnitude speedup over the image stitching plugin.
• Out of Core LU Decomposition, which does not implement the workflow system. This case study demonstrates the impact of the PCI express on a problem with a large number of dependencies. A proposed workflow system for this algorithm is provided in Future Work.

Using the workflow system, programmers have a method for scheduling any algorithm on all available compute resources and is capable of hiding the I/O impact by overlapping computation with I/O.

Committee Members: Milton Halem, Yelena Yesha, Shujia Zhou, John Dorband, Walid Keyrouz

Baltimore Chapter of Electron Devices and Solid-State Circuits

Quantum Engineering of Semiconductor Atomic Structures for Biosensing

Dr. Manijeh Razeghi
Center for Quantum Devices
Electrical Engineering and Computer Science
Northwestern University

5:30pm Tuesday, 30 April 2013
206 Technology Research Center, UMBC

5:30pm social hour, talk begins at 6:15pm. Free but please RSVP to Sorry, you need javascript to view this email address. by Monday, April 29

Nature offers us different kinds of atoms, but it takes human intelligence to put them together in an elegant way in order to realize functional structures not found in nature. III-V semiconductors are made of atoms from column III (B, Al, Ga, In, Tl) and column V (N, As, P, Sb, Bi) of the periodic table, and constitute a particularly rich variety of compounds with many useful optical and electronic properties. Guided by highly accurate simulations of the electronic structure, modern semiconductor optoelectronic devices are literally made atom by atom using advanced growth technology such as Molecular Beam Epitaxy (MBE) and Metal Organic Chemical Vapor Deposition (MOCVD). Recent breakthroughs have brought quantum engineering to an unprecedented level, creating light detectors and emitters over an extremely wide spectral range from 0.2 µm to 300 µm. Nitrogen serves as the best column V element for the short wavelength side of the electromagnetic spectrum, where we have demonstrated III-nitride light emitting diodes and photo detectors in the deep ultraviolet to visible wavelengths. In the infrared, III-V compounds using phosphorus, arsenic, or antimony from column V with indium, gallium, aluminum, or thallium from column III can create lasers and detectors based on quantum-dot (QD) or type-II superlattice (T2SL). These are fast becoming the choice of technology in crucial applications such as environmental monitoring and space exploration. Last but not least, on the far-infrared end of the electromagnetic spectrum known as the terahertz (THz) region, III-V semiconductors offer a unique solution of generating THz waves in a compact device at room temperature. Continued effort is being devoted to all of the above areas with the intention of developing smart technologies which meet the current challenges in environment, health, security, and energy. This talk will highlight contributions to the world of III-V semiconductor nano-scale optoelectronic devices from deep UV to THz.

Dr. Manijeh Razeghi received the Doctorat d'État es Sciences Physiques from the Université de Paris in 1980. After heading the Exploratory Materials Lab at Thomson-CSF (France), she joined Northwestern University in Evanston, IL, in the fall of 1991 as the Director of the Center for Quantum Devices, where she created undergraduate and graduate programs in solid-state engineering. Dr. Razeghi pioneered the development and implementation of major modern epitaxial techniques such as MOCVD, VPE, gas MBE, and MOMBE for the growth of entire compositional ranges of III-V compound semiconductors. She is on the editorial board of journals such as the Journal of Nanotechnology and the Journal of Nanoscience and Nanotechnology, and is an Associate Editor of the Opto-Electronics Review. Dr. Razeghi is on the International Advisory Board for the Polish Committee of Science, and is an Adjunct Professor at the College of Optical Sciences of the University of Arizona in Tucson. She ha s authored or co-authored more than 1000 papers, over 30 book chapters, and fifteen books, including the textbooks Technology of Quantum Devices and Fundamentals of Solid State Engineering, 3rd Edition. Two of her books, MOCVD Challenge Vol. 1 (1989) and MOCVD Challenge Vol. 2 (1995), discuss some of her pioneering work in InP-GaInAsP and GaAs-GaInAsP based systems. [The MOCVD Challenge, 2nd Edition (2010) represents the combined updated version of Volumes 1 and 2]. Dr. Razeghi holds 50 U.S. patents and has given more than 1000 invited and plenary talks. Her current research interest is in nanoscale optoelectronic quantum devices. Dr. Razeghi is a Fellow of MRS, IOP, IEEE, APS, SPIE, OSA, and the International Engineering Consortium (IEC), a Fellow and Life Member of the Society of Women Engineers (SWE), and a member of the Electrochemical Society, ACS, AAAS, and the French Academy of Sciences and Technology. She received the IBM Europe Science and Technology Prize in 1987, the Achievement Award from the SWE in 1995, the R.F. Bunshah! Award in 2004, and multiple best paper awards.

The following full-time positions have been posted within the past week to UMBCworks. Login to your account (via the link in the Jobs & Internships topic in myUMBC) and find details and application instructions as well as hundreds of other job postings!

9257914 - Biomedical Data Manager - IMS, Inc.
9257874 - Retail Account Management Service Associate - T. Rowe Price
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The following part-time positions have been posted within the past week to UMBCworks. Login to your account (via the link in the Jobs & Internships topic in myUMBC) and find details and application instructions as well as hundreds of other job postings!

9257930 - Zirtual Assistant - Zirtual, Inc.
9257917 - Bilingual Telephone Research Interviewer - IMPAQ International
9257925 - IT Technical Support - Linwood Children's Center
9257924 - Receptionist/Administrative Assistant - Linwood Children's Center
9257900 - Production Assistant/Evening - Sinclair Broadcast Group

Check out this opportunity:  Scholarships are available to attend the Grace Hopper Celebration of Women in Computing (GHC), the world's largest gathering of technical women in computing. This year, the GHC will be held in Minneapolis, MN, October 2-5, 2013.

Scholarship applications are due by May 15, 2013, and will take some time to prepare, so please visit the website below as soon as possible to learn the details.

http://gracehopper.org/2013/participate/ghc-scholarships/

Questions?  Contact Cindy Greenwood in CWIT at cindyg@umbc.edu or 410-455-3881.