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Spiral in scala

Georg Ofenbeck, Tiark Rompf, Alen Stojanov, Martin Odersky, Markus Püschel
2013 Proceedings of the 12th international conference on Generative programming: concepts & experiences - GPCE '13  
Spiral is a library generator for linear transforms such as the discrete Fourier transform (DFT). The version we consider here gener-  ...  As a case study, we implement a small, but representative subset of Spiral in Scala using the Lightweight Modular Staging (LMS) framework.  ...  Introduction The development of highest performance code on modern processors is extremely difficult due to deep memory hierarchies, vector instructions, multiple cores, and inherent limitations of com-Permission  ... 
doi:10.1145/2517208.2517228 dblp:conf/gpce/OfenbeckRSOP13 fatcat:buvxb5h6qjdfbfmjtenq2luxgq

SPIRAL: Code Generation for DSP Transforms

M. Puschel, J.M.F. Moura, J.R. Johnson, D. Padua, M.M. Veloso, B.W. Singer, Jianxin Xiong, F. Franchetti, A. Gacic, Y. Voronenko, K. Chen, R.W. Johnson (+1 others)
2005 Proceedings of the IEEE  
Fast changing, increasingly complex, and diverse computing platforms pose central problems in scientific computing: How to achieve, with reasonable effort, portable optimal performance?  ...  For a specified transform, SPIRAL automatically generates high-performance code that is tuned to the given platform.  ...  Darema, during the development of SPIRAL.  ... 
doi:10.1109/jproc.2004.840306 fatcat:gdb4elhbl5eg5h7obiipe2sjlu

A Microfabricated Spiral-Groove Turbopump Supported on Microball Bearings

Christopher Mike Waits, Matthew McCarthy, Reza Ghodssi
2010 Journal of microelectromechanical systems  
The development of a microfabricated turbopump that is capable of delivering liquid fuel with the flow rates and pressures required for portable power generation is reported.  ...  The device is composed of a spiral-groove viscous pump driven by a radial in-flow microturbine and supported using a newly developed encapsulated microball bearing.  ...  The reason for decreased performance after reaching the maximum was not readily evident but is believed to be due to fracturing of thin sections of the raceway due to the extreme thrust force.  ... 
doi:10.1109/jmems.2009.2035525 fatcat:cvfxfuaafnca7kp2ylsaweok5y

A spiral model of software development and enhancement

B. W. Boehm
1988 Computer  
Shortfalls in externally performed tasks 9. Real-time performance shortfalls 10. Straining 7.  ...  Each cycle of the spiral begins with the identification of the objectives of the portion of the product being elaborated (performance, functionality, ability t o accommodate change, etc.); the alternative  ...  Software risk management The discipline of software risk management provides a bridge between spiral model concepts and currently established software acquisition and development procedures.  ... 
doi:10.1109/2.59 fatcat:fspardjni5gvrd4nshqrsqwaam

A spiral model of software development and enhancement

B Boehm
1986 Software engineering notes  
Shortfalls in externally performed tasks 9. Real-time performance shortfalls 10. Straining 7.  ...  Each cycle of the spiral begins with the identification of the objectives of the portion of the product being elaborated (performance, functionality, ability t o accommodate change, etc.); the alternative  ...  Software risk management The discipline of software risk management provides a bridge between spiral model concepts and currently established software acquisition and development procedures.  ... 
doi:10.1145/12944.12948 fatcat:ltkgpisstrdmjkuw6hgezvum7q

Spiral tracing on a touchscreen is influenced by age, hand, implement, and friction

Brittany D. Heintz, Kevin G. Keenan, Lutz Jäncke
2018 PLoS ONE  
Root mean square error was calculated to quantify performance.  ...  This study examined age-related differences while tracing on high-and low-friction touchscreens using the finger or stylus. 26 young and 24 older adults completed an Archimedes spiral tracing task on a  ...  For the spiral tracing task, one repeated measures ANOVA was performed with four factors.  ... 
doi:10.1371/journal.pone.0191309 pmid:29389940 pmcid:PMC5794070 fatcat:27ed5ljacjc7na56l3zso5nnpm

Analytical modelling of spiral cantilever structure for vibration energy harvesting applications

Nevin Augustine, Hemanth Kotturu, S Meenatchi Sundaram, G S. Vijay
2018 International Journal of Engineering & Technology  
The work provides guideline for vibration energy harvesting structure design for an improved performance.  ...  Here, we propose a spiral geometry for micro harvester structures with low fundamental frequencies compared to traditional cantilevers.  ...  The structure has been simulated with different number of spiral beams from 8-20 beams and structural analysis has been performed on each structures.  ... 
doi:10.14419/ijet.v7i2.21.11832 fatcat:2arlytbht5bgng4bvzkgbdty3m

A New Design for Compact Size Wireless Power Transfer Applications Using Spiral Defected Ground Structures

R. Hussein, H. A. Atallah, S. Hekal, A. B. Abdel-Rahman
2018 Radioengineering  
The suggested system contains two spiral defected ground structure (DGS) resonators coupled back-toback.  ...  WPT is an extremely useful technology that has numerous applications and benefits.  ...  Tuned wire coils and printed resonant spirals MHz-GHz Mid- Resonant inductive coupling Charging portable devices and smart cards.  ... 
doi:10.13164/re.2018.1032 fatcat:5c37n5holjbijkv2xzohukykpm

Digitized Spiral Drawing: A Possible Biomarker for Early Parkinson's Disease

Marta San Luciano, Cuiling Wang, Roberto A. Ortega, Qiping Yu, Sarah Boschung, Jeannie Soto-Valencia, Susan B. Bressman, Richard B. Lipton, Seth Pullman, Rachel Saunders-Pullman, Weidong Le
2016 PLoS ONE  
performance and disability.  ...  Linear mixed effect adjusted models comparing these indices and cross-validation were performed.  ...  Models were performed including and excluding spiral severity.  ... 
doi:10.1371/journal.pone.0162799 pmid:27732597 pmcid:PMC5061372 fatcat:3eqsfyqaabcphgcskdjge56ida

The Three-Dimensional Behavior of Spiral Shocks in Protoplanetary Disks [article]

Aaron C. Boley
2007 arXiv   pre-print
In this dissertation, I describe theoretical and numerical studies that address the three-dimensional behavior of spiral shocks in protoplanetary disks and the controversial topic of gas giant formation  ...  For this work, I discuss characteristics of gravitational instabilities (GIs) in bursting and asymptotic phase disks; outline a theory for the three-dimensional structure of spiral shocks, called shock  ...  It appears that shock bores are the extreme nonlinear outcome when f -modes develop into strong spiral shocks.  ... 
arXiv:0710.1244v2 fatcat:6e6qwikwnzfh3nthwkhz2tzvyu


Choon Beng Sia, Wei Meng Lim, Beng Hwee Ong, Ah Fatt Tong, Kiat Seng Yeo
2013 Electromagnetic Waves  
The performances of active devices are advancing at such an amazing pace, attracting many cost-sensitive high frequency portable communication applications (> 5 GHz) to turn to silicon for solution.  ...  However, beyond 2.5 GHz, the inductors experience self-resonance and their inductances increase differently over frequency, making fair performance comparisons of identical inductance extremely difficult  ... 
doi:10.2528/pier13082001 fatcat:skxvrxr7rjhktiqgkmym3dam2q

Screening of Parkinson's Disease Using Geometric Features Extracted from Spiral Drawings

Jay Chandra, Siva Muthupalaniappan, Zisheng Shang, Richard Deng, Raymond Lin, Irina Tolkova, Dignity Butts, Daniel Sul, Sammer Marzouk, Soham Bose, Alexander Chen, Anushka Bhaskar (+2 others)
2021 Brain Sciences  
Tablet technologies that enable data collection during handwriting and drawing tasks may provide low-cost, portable, and instantaneous quantitative methods for high-throughput PD screening.  ...  Focusing on digitized drawings of Archimedean spirals, the present study utilized data from the open-access ParkinsonHW dataset to improve existing PD drawing diagnostic pipelines.  ...  Overall, 57 patients had two spiral drawings, 4 patients only had one spiral drawing, and 1 patient only performed the CMT (no spiral drawings).  ... 
doi:10.3390/brainsci11101297 pmid:34679363 fatcat:yuar37lc6jbn7cqf7svnmnqgcy

Generating Optimized Fourier Interpolation Routines for Density Functional Theory Using SPIRAL

Doru Thom Popovici, Francis P. Russell, Karl Wilkinson, Chris-Kriton Skylaris, Paul H. J. Kelly, Franz Franchetti
2015 2015 IEEE International Parallel and Distributed Processing Symposium  
We present a formalization of this operation within the SPIRAL framework and demonstrate auto-generated and autotuned interpolation libraries.  ...  We compare the performance of our generated code against the previous best implementations using highly optimized FFT libraries (FFTW and MKL).  ...  This shows the impact of the data layout transformations and the loop merging we performed to optimize the 3D upsampling. Performance portability.  ... 
doi:10.1109/ipdps.2015.112 dblp:conf/ipps/PopoviciRWSKF15 fatcat:fwhzbligiraerpnzcivtt6lihe

Compact Size of an Interdigital Band-Pass Filter with Flexible Bandwidth and Low Insertion-Loss Using a Folded Spiral and Stepped Impedance Resonant Structure

Kicheol Yoon, Kwanggi Kim
2021 Electronics  
Hence, in this study, we propose a compact interdigital BPF based on a spiral and folded stepped impedance resonator (SIR), which affords low IL and excellent group delay.  ...  The spiral, folded structure facilitates drastic FBW adjustment: the center frequency and adjustable range of the FBW of the designed BPF are 800 MHz and 80 to 180%, respectively.  ...  The requirements for a portable wireless communication system are high performance, small size, and bandwidth securing function [1] . In wireless communication, a bandpass filter (BPF) is essential.  ... 
doi:10.3390/electronics10162003 fatcat:ulkqxwd46bfsri4b7f5x6jklz4

SPIRAL Phase A: a prototype integral field spectrograph for the AAT

Ian R. Parry, Matthew A. Kenworthy, Keith Taylor, Arne L. Ardeberg
1997 Optical Telescopes of Today and Tomorrow  
Section 5 briefly covers the performance and accuracy of the fiber positioning technique that is used in the construction of the lens array and focal plane unit for SPIRAL Phase A.  ...  The performance of the spectrograph is given in Section 6 and preliminary scientific results are then presented in Section 7.  ...  Although there are many other methods used to perform integral field spectroscopy (IFS) the extremely versatile properties of optical fibers naturally lend themselves to optical D tel . α fiber can therefore  ... 
doi:10.1117/12.269024 fatcat:c62v2onnqncefeplftqhvx4uum
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