Wisconsin Alumni Research Foundation

Technology

New Hardware Helps Cell Phones, Tablets Save Power

Energy efficiency is important in mobile electronics such as smart phones and tablets because of their size and reliance on battery power. At the same time, these kinds of devices must perform increas...
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Nam Sung Kim, Srinivasan Narayanamoorthy | P140276US01

Technology

Improving Memory Access in Asymmetric Memories

In computer memory there is a tradeoff between capacity (how much data can be stored) and latency (how quickly it can be accessed). To achieve a balance, typical memory systems employ a hierarchy of d...
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Nam Sung Kim, Hao Wang | P150172US01

Technology

Database Engine for Faster Analytics

Given the ever increasing amount of “big data” available, new analysis and processing tools are needed to fully leverage it. Big data is challenging to manage, requiring sophisticated mechanisms a...
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Jignesh Patel, Yinan Li | P140266US01

Technology

Managing Memory in Virtualized Computer Systems

Computer programs access memory using virtual addresses, which are translated by hardware into unique physical addresses that locate the data in the cache or memory. The set of virtual addresses acces...
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Mark Hill, Michael Swift, Jayneel Gandhi | P150108US01

Technology

Method Predicts Porting Speedup

High-performance computers may employ two processor systems having very different architectures, such as a CPU (computer processing unit) and a GPU (graphic processing unit). The ability of a GPU to h...
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Karthikeyan Sankaralingam, Newsha Ardalani, Xiaojin (Jerry) Zhu | P140165US01

Technology

Measuring Lignin in Corn Stalks

The lignin in corn stalks makes it difficult to process for biomass and harder for animals to digest. Levels are especially high in the tough outer ‘rind’ and vascular bundles of the stem. For th...
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Edgar Spalding, Sven Heckwolf | P140381US01

Technology

Predicting Protein Hot Spot Residues

Most biological processes involve multiple proteins interacting with each other. While the principles governing protein-protein interactions are not fully understood, it is known that a small subset o...
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Julie Mitchell, Xiaolei Zhu, Steven Darnell | P140357US01

Technology

Energy-Efficient Parallel Processing

In a multicore processor, the different cores share a common clock timing and operate at a synchronized frequency. Such processors are fast because their cores can work in parallel to execute differen...
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Nam Sung Kim | P140039US01

Technology

Memory Conserves Power, Is More Reliable

As circuit density increases, power efficiency has become a design priority for high-performance and low-power processors. Better energy efficiency means faster speeds and longer battery life. One te...
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Nam Sung Kim | P140001US01

Technology

Qubit Measurement System Is Efficient, Scalable

In the field of quantum computing, the performance of quantum bits (‘qubits’) has advanced rapidly in recent years. A truly scalable system requires the ability to rapidly and accurately m...
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Robert McDermott, Frank Wilhelm-Mauch, Britton Plourde, Maxim Vavilov, Luke Govia, Emily Pritchett | P140246US01

Technology

Improved Gate Design for Quantum Computers

Some extremely complex tasks – like sorting very large databases or factoring large numbers – are challenging for classical computers. Quantum computers can solve such problems because they use qu...
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Mark Eriksson, John Gamble, Daniel Ward, Susan Coppersmith, Mark Friesen | P130184US02

Technology

Computer Accelerator System Boosts Efficiency

Hardware accelerators improve computer performance by allowing the main processor to off-load certain tasks, for example, processing floating-point or graphics calculations. The accelerator is designe...
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Karthikeyan Sankaralingam, Chen-Han Ho, Sung Kim | P140164US01

Technology

Predicting Computer Memory Failure

It is widely accepted that future processor technology will suffer from some degree of failure due to core aging. This failure leads to device faults. Anticipating faults before they occur can help th...
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Karthikeyan Sankaralingam, Amir Yazdanbakhsh, Raghuraman Balasubramanian, Anthony Nowatzki | P150070US01

Technology

Managing Computer Power and Performance

Energy consumption is a major constraint in computer design because of factors like power costs, operating life and heat. The tradeoff between energy consumption and performance is managed to some deg...
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David Wood, Rathijit Sen | P140071US01

Technology

More Efficient Semiconductor Lasers

Quantum cascade lasers (QCLs) are semiconductor lasers that provide light in the mid- and far-infrared wavelength ranges. They are designed so that the generated light is transverse-magnetic (TM) pola...
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Luke Mawst, Dan Botez, Thomas Earles, Jeremy Kirch, Christopher Sigler | P140047US01

Technology

More Accurate Branch Predictor Circuit

A branch predictor is a digital circuit that attempts to direct traffic in an instruction stream. Branching is usually implemented with a conditional jump instruction, and branches may be ‘taken’ ...
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Mikko Lipasti, Dibakar Gope | P140330US01

Technology

Enhanced Traveling Wave Tube

A traveling wave tube (TWT) is a vacuum electronic device that acts as a microwave amplifier capable of providing high gain and high output power. TWTs are used in many wireless devices like radar sys...
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Nader Behdad, Arash Rashidi Tarhani | P140188US01

Technology

Predicting Logic Gate Failure

Logic gates are the building blocks of integrated circuits. They use multiple transistors to receive and interpret voltage inputs, then provide outputs. Future generations of integrated circuit micr...
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Karthikeyan Sankaralingam, Raghuraman Balasubramanian | P130365US01

Technology

Maximizing Multicore Processor Performance

Computer processors typically include a number of central processing unit (CPU) cores for executing instructions. Each core is capable of reading and executing a sequence of instruction code, or ‘th...
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Nam Sung Kim | P130137US01

Technology

Optimizing Parallelism During Run-Time

Executing different portions of a program in parallel on different processors is known as parallelism. While this can boost how fast a program is executed, increased parallelism is not always benefici...
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Gurindar Sohi, Srinath Sridharan | P130131US01

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