132,458 research outputs found
Supplementary Material for "Swimmers in the Loop: sensing moving water masses for an auditive biofeedback system"
No full textCesarini D, Ungerechts B, Hermann T. Supplementary Material for "Swimmers in the Loop: sensing moving water masses for an auditive biofeedback system". Bielefeld University; 2015
Wie ein Fisch im Wasser – Strömungseffekte beim Schwimmen hörbar machen
No full textUngerechts B, Cesarini D, Hamann M, Hermann T, eds. Wie ein Fisch im Wasser – Strömungseffekte beim Schwimmen hörbar machen. IM SPEKTRUM - Sonifikation im Leistungssport. 2016;BIO spektrum(06.2016)
Virginii Caesarini Carmina ...
No full textMode of access: Internet.Titulo de la antep.: "Poesie liriche toscane, e latine di D. Virginio Cesarini"Portada fileteada con grabado xilográfico.Antep.Anteportada calcográfica de Antonio Bosio.Sign.: [cruz griega]8, a8, A-D8, E6, A-H8 I2
Unleashing Fine-Grained Parallelism on Embedded Many-Core Accelerators with Lightweight OpenMP Tasking
No full textIn recent years, programmable many-core accelerators (PMCAs) have been introduced in embedded systems to satisfy stringent performance/Watt requirements. This has increased the urge for programming models capable of effectively leveraging hundreds to thousands of processors. Task-based parallelism has the potential to provide such capabilities, offering high-level abstractions to outline abundant and irregular parallelism in embedded applications. However, efficiently supporting this programming paradigm on embedded PMCAs is challenging, due to the large time and space overheads it introduces. In this paper we describe a lightweight OpenMP tasking runtime environment (RTE) design for a state-of-the-art embedded PMCA, the Kalray MPPA 256. We provide an exhaustive characterization of the costs of our RTE, considering both synthetic workload and real programs, and we compare to several other tasking RTEs. Experimental results confirm that our solution achieves near-ideal parallelization speedups for tasks as small as 5K cycles, and an average speedup of 12 × for real benchmarks, which is 60% higher than what we observe with the original Kalray OpenMP implementation
Using gait symmetry to virtually align a triaxial accelerometer during running and walking
No full textDuring running and walking the human centre of mass experiences a symmetric acceleration along the mediolateral direction. This reported work shows how to exploit this knowledge to correct misalignments of the axes of a trunk-mounted accelerometer with respect to the body axes. After vertical alignment, based on the gravitational component of the signal, the technique computes the virtual rotation angle of the axes lying in the horizontal plane. The chosen angle minimises the autocorrelation of the signal along the mediolateral direction
Modeling and Evaluation of Application-Aware Dynamic Thermal Control in HPC Nodes
No full textAs side effects of the end of Dennard’s scaling, power and thermal technological walls stand in front of the evolution of supercomputers towards the exaflops era. Energy and temperature walls are big challenges to face for assuring a constant grow of performance in future. New generation architectures for HPC systems implement HW and SW components to address energy and thermal issues for increasing power and efficient computing in scientific workload. In thermal-bound HPC machines, workload-aware runtimes can leverage hardware knobs to guarantee the best operating point in term of performance and power saving without violating thermal constraints. In this paper, we present an integer-linear programming formulation for job mapping and frequency selection for thermal-bound HPC nodes. We use a fast solver and workload traces extracted from a real supercomputer to test our methodology. Our runtime is integrated into the MPI library, and it is capable of assigning high-performance cores to performance-critical processes. Critical processes are identified at execution time through a mathematical formulation, which relies on the characterization of the application workload and on the global synchronization barriers. We demonstrate that by combining long and short horizon predictions with information on the critical processes retrieved from the programming model, we can drastically improve the performance of the target application w.r.t. state-of-the-art DTM solutions
An optimized task-based runtime system for resource-constrained parallel accelerators
No full textManycore accelerators have recently proven a promising solution for increasingly powerful and energy efficient computing systems. This raises the need for parallel programming models capable of effectively leveraging hundreds to thousands of processors. Task-based parallelism has the potential to provide such capabilities, offering flexible support to fine-grained and irregular parallelism. However, efficiently supporting this programming paradigm on resource-constrained parallel accelerators is a challenging task. In this paper, we present an optimized implementation of the OpenMP tasking model for embedded parallel accelerators, discussing the key design solution that guarantee small memory (footprint) and minimize performance overheads. We validate our design by comparing to several state-of-the-art tasking implementations, using the most representative parallelization patterns. The experimental results confirm that our solution achieves near-ideal speedups for tasks as small as 5K cycles
Inkjet printed hybrid light sensors based on titanium dioxide and PEDOT:PSS
No full textWe demonstrate photodetectors sensitive to ultraviolet light entirely developed by means of inkjet printing technique and based on titanium dioxide and PEDOT:PSS. Devices have a lateral architecture and are realized on a plastic substrate, thanks to the low thermal budget production process. Pure titania devices behave as standard photodetectors, increasing their conductivity by more than four orders of magnitude upon UV light exposure. Bilayers of PEDOT:PSS and titania show an inverted behavior, with a high conductivity in the dark which drops by seven orders of magnitude upon light exposure: this is likely due to the fast recombination of PEDOT:PSS holes with photogenerated TiO2 electrons. The series connection of pure TiO2 and of PEDOT:PSS/TiO2 bilayer is suggested as the basis for the development of low-power, complementary-like, photosensitive voltage dividers
Strutture proprietarie e modelli di governo societario dei principali sistemi finanziari europei
No full textReal-time Sonification in Swimming – from pressure changes of displaced water to sound
No full textUngerechts B, Cesarini D, Hermann T. Real-time Sonification in Swimming – from pressure changes of displaced water to sound. In: Mason B, ed. BMS2014— Proceedings. Australian Institute of Sport, Canberra; 2014: 269-275
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