We present a user-controllable, general-purpose, pseudorandom task graph generator called Task Graphs For Free (TGFF). TGFF creates problem instances for use in allocation and scheduling research. It has the ability to generate independent tasks as well sets which are composed of partially ordered graphs. A complete description instance is created, including attributes processors, communication resources, tasks, inter-task communication. The user may parametrically control correlations...

We present a user-controllable, general-purpose, pseudorandom task graph generator called Task Graphs For Free (TGFF). TGFF creates problem instances for use in allocation and scheduling research. It has the ability to generate independent tasks as well sets which are composed of partially ordered graphs. A complete description instance is created, including attributes processors, communication resources, tasks, inter-task communication. The user may parametrically control correlations...

Article Free Access Share on TGFF: task graphs for free Authors: Robert P. Dick Department of Electrical Engineering, Princeton University, Princeton, New Jersey JerseyView Profile , David L. Rhodes and US Army CECOM/RDEC, AMSEL-RD-C2-SC-M, Fort Monmouth, Wayne Wolf Authors Info & Claims CODES/CASHE '98: Proceedings the 6th international workshop Hardware/software codesignMarch 1998 Pages 97–101Online:01 March 1998Publication History 229citation1,163DownloadsMetricsTotal Citations229Total...

This paper presents a wireless transceiver intended for insect-based sensor networks (WSNs). The utilizes several design techniques developed to meet the challenging low power and size requirements in WSNs. include current reuse voltage-controlled oscillator (VCO) amplifier (PA), fast PLL on/off switching low-power keying (OOK) modulation, between transmit receive (TX/RX) modes without an off-chip switch. Also, VCO, PA, noise (LNA), OOK modulator, TX/RX switch are co-designed integrated into...

Developing methods for alternative testing is increasingly important due to dwindling funding resources and increasing costs associated with animal legislation. We propose test the feasibility of a new novel method detecting DNA mutagenesis using millimeter wave spectroscopy. Although spectroscopy has been known since 1950s, cost was prohibitive studies did not extend large biological proteins such as DNA. Recent advances have made this technology feasible developing laboratory field...

Electronic sources based upon resonant tunneling diodes (RTDs) usually generate power by establishing limit cycles which exchange energy with storage elements in an external biasing circuit; hence, the output this type of implementation will always be limited extrinsic effects. We verify presence multiple energy-storage mechanisms solely within RTD and characterizes interdependencies necessary to induce intrinsic oscillations observed quantum mechanical simulations. Specifically, we show...

With the growing trend in ASIC design to include more analog functions on chip, various support and automation efforts have arisen address concerns. Existing hardware description languages been widely used for representation, documentation transfer mainly digital domain, with standards such as VHDL being fairly mature. In this paper we present two that are underway developing standardized languages. One of these is a new language called MHDL mixed-signal representation while second aimed at...

We describe the first co-design technique aimed at heterogeneous systems employing arbitrated communication. Arbitrated system design is especially difficult because communication scheduling directly tied to task allocation. The method provides a complete co-design-i.e. generation of hardware configuration along with an allocation and schedule for execution hard real-time data-dependent tasks. By using actual analysis in inner loop, readily able address realistic effects including various...

Due to ongoing improvements in the performance and programmability of commercially available Graphics Processor Units (GPUs), substantial increases execution speed EM propagation analysis through ray tracing is now attainable. This paper presents recent results where RF has been applied analyze signal over complex urban 3D scene models. The trace algorithms were programmed operate as parallel processes hundreds core processors that make up architecture off-the-shelf GPU chips.

We present Lucent Technologies' first dual-MAC DSP core. The 16-bit, fixed-point device features a datapath with two 16/spl times/16-bit multipliers and dual 40-bit adders that can all operate in one clock cycle to support compute-intensive algorithms. In addition, the includes special hardware aspects of key communications applications such as wireless terminals, infrastructure, multichannel modems. architecture offers solution for these balances performance, cost power dissipation.

We describe the first co-design technique aimed at heterogeneous systems employing arbitrated communication. Arbitrated system design is especially difficult because communication scheduling directly tied to task allocation. The method provides a complete co-design-i.e. generation of hardware configuration along with an allocation and schedule for execution hard real-time data-dependent tasks. By using actual analysis in inner loop, readily able address realistic effects including various...

A transient semiconductor device simulation model based on the recently developed Lei-Ting hydrodynamic balance equations is presented. Unlike other models, where various relaxation rates are imported from Monte Carlo calculations or simply assumed to be constant, our calculates these within process, as functions of electron drift velocity, temperature, well density. Without any complicated mathematics, a decoupled method with relatively large time step has been applied one-dimensional...

A new software CAD tool entitled MIDAS has been developed for microwave RF network design. allows use of algebriac expressions to define and value necessary analysis. In addition, any expression may be frequency-dependent. is fully integrated with PLANA, a measurement program, allowing PLANA networks sub-networks MIDAS. New component models entirely expressed in language, alleviating the need program other languages.

Even though analog circuit and simulation technology came first, the computer-aided design of digital circuitry is more mature. This flourishing state affairs can be traced in part to two hardware description languages, VHDL Verilog, which have fostered interchangeable designs interoperable analysis tools. The same route worth following realm. Analog circuits are increasing number complexity, especially communications products importance analyzing side-effects high-speed growing rapidly....

A method is described that combines large-signal load tuning (i.e. load-pull) measurements with harmonic balance and optimization techniques to characterize GaAs MESFET devices. An important advantage of the device model parameters are obtained at frequencies which will operate in circuits. Consequently, ambiguities regarding any frequency dependencies eliminated, thereby improving accuracy simulation. The best suited as a supplement previously reported DC small-signal parameter extraction...

In this paper, the results of implementing a harmonic balance simulator, AGILE, on variety massively parallel computers (MPCs) is given. Descriptions computer hardware, which includes both shared-memory and message-passing implementations, algorithms used to parallelize computations are presented. The include CM-5, KSR-1, networked set nonheterogeneous workstations using UNIX RPC. A key aspect description for each obtained.

The intrinsically fast process of resonant tunneling through double barrier heterostructures along with the existence negative differential resistance in current-voltage characteristic these structures has led to their implementation as sources for high frequency electromagnetic energy. While based upon diodes (RTDs) have produced oscillations up 712 GHz, only microwatt levels performance been achieved above 100 GHz. Since stability criteria plays critical role determining deliverable power...

Rather than approach the parallelization of harmonic balance simulation method numerically, a novel scheduling-oriented is described. The technique leverages circuit substructure to expose potential parallelism in form directed, acyclic graph (dag) computations. This dag then allocated and scheduled using various linear clustering techniques. result highly scalable efficient simulation. Two large examples, one from integrated regime another communication regime, executed on three different...

The paper presents new models for process activation and scheduling real-time embedded systems. authors introduce a realistic, yet high-level input data arrival model which includes both polled interrupt-driven activation. They consider the effect of combinations these styles on static, priority-based, preemptive scheduler. Given set periodic tasks resources (e.g. processors), configuration is defined as: i) mapping each to resource; ii) assignment priority process; iii) interprocess...

Article Free Access Share on Overhead effects in real-time preemptive schedules Authors: David L. Rhodes US Army CECOM/RDEC CECOM/RDECView Profile , Wayne Wolf Princeton Univ., Princeton, NJ NJView Authors Info & Claims CODES '99: Proceedings of the seventh international workshop Hardware/software codesignMarch 1999Pages 193–197https://doi.org/10.1145/301177.301529Published:01 March 1999Publication History 4citation265DownloadsMetricsTotal Citations4Total Downloads265Last 12 Months11Last 6...

A multi-state graph is defined as a where each edge associated with stochastic, rather than fixed, value. For cases the stochastic value discrete and represents distance or time, an algorithm presented which efficiently finds single-source shortest paths distances for all combinations of values. Infinite negative weight values are allowed long there no cycles. Efficiency achieved by both leveraging dynamic programming only finding solutions set dominant states that correctly cover any...

A new technique for single-bus heterogeneous system scheduling and hardware-software codesign is presented. This addresses challenging real-time problem domains (e.g., multirate periodic dependent tasks) preemptive target systems including operating overheads communication contention along with proper protocol handling. Such realistic attributes are often times ignored in efforts, but addressed here using a novel "real-analysis" approach. foregoes the usual list- or cluster-oriented...