BarraCUDA - a fast short read sequence aligner using graphics processing units

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Klus Petr

2012-01-01

Full Text Available Abstract Background With the maturation of next-generation DNA sequencing (NGS technologies, the throughput of DNA sequencing reads has soared to over 600 gigabases from a single instrument run. General purpose computing on graphics processing units (GPGPU, extracts the computing power from hundreds of parallel stream processors within graphics processing cores and provides a cost-effective and energy efficient alternative to traditional high-performance computing (HPC clusters. In this article, we describe the implementation of BarraCUDA, a GPGPU sequence alignment software that is based on BWA, to accelerate the alignment of sequencing reads generated by these instruments to a reference DNA sequence. Findings Using the NVIDIA Compute Unified Device Architecture (CUDA software development environment, we ported the most computational-intensive alignment component of BWA to GPU to take advantage of the massive parallelism. As a result, BarraCUDA offers a magnitude of performance boost in alignment throughput when compared to a CPU core while delivering the same level of alignment fidelity. The software is also capable of supporting multiple CUDA devices in parallel to further accelerate the alignment throughput. Conclusions BarraCUDA is designed to take advantage of the parallelism of GPU to accelerate the alignment of millions of sequencing reads generated by NGS instruments. By doing this, we could, at least in part streamline the current bioinformatics pipeline such that the wider scientific community could benefit from the sequencing technology. BarraCUDA is currently available from http://seqbarracuda.sf.net

BarraCUDA - a fast short read sequence aligner using graphics processing units

LENUS (Irish Health Repository)

Klus, Petr

2012-01-13

Abstract Background With the maturation of next-generation DNA sequencing (NGS) technologies, the throughput of DNA sequencing reads has soared to over 600 gigabases from a single instrument run. General purpose computing on graphics processing units (GPGPU), extracts the computing power from hundreds of parallel stream processors within graphics processing cores and provides a cost-effective and energy efficient alternative to traditional high-performance computing (HPC) clusters. In this article, we describe the implementation of BarraCUDA, a GPGPU sequence alignment software that is based on BWA, to accelerate the alignment of sequencing reads generated by these instruments to a reference DNA sequence. Findings Using the NVIDIA Compute Unified Device Architecture (CUDA) software development environment, we ported the most computational-intensive alignment component of BWA to GPU to take advantage of the massive parallelism. As a result, BarraCUDA offers a magnitude of performance boost in alignment throughput when compared to a CPU core while delivering the same level of alignment fidelity. The software is also capable of supporting multiple CUDA devices in parallel to further accelerate the alignment throughput. Conclusions BarraCUDA is designed to take advantage of the parallelism of GPU to accelerate the alignment of millions of sequencing reads generated by NGS instruments. By doing this, we could, at least in part streamline the current bioinformatics pipeline such that the wider scientific community could benefit from the sequencing technology. BarraCUDA is currently available from http:\\/\\/seqbarracuda.sf.net

A TBB-CUDA Implementation for Background Removal in a Video-Based Fire Detection System

Directory of Open Access Journals (Sweden)

Fan Wang

2014-01-01

Full Text Available This paper presents a parallel TBB-CUDA implementation for the acceleration of single-Gaussian distribution model, which is effective for background removal in the video-based fire detection system. In this framework, TBB mainly deals with initializing work of the estimated Gaussian model running on CPU, and CUDA performs background removal and adaption of the model running on GPU. This implementation can exploit the combined computation power of TBB-CUDA, which can be applied to the real-time environment. Over 220 video sequences are utilized in the experiments. The experimental results illustrate that TBB+CUDA can achieve a higher speedup than both TBB and CUDA. The proposed framework can effectively overcome the disadvantages of limited memory bandwidth and few execution units of CPU, and it reduces data transfer latency and memory latency between CPU and GPU.

cudaMap: a GPU accelerated program for gene expression connectivity mapping.

Science.gov (United States)

McArt, Darragh G; Bankhead, Peter; Dunne, Philip D; Salto-Tellez, Manuel; Hamilton, Peter; Zhang, Shu-Dong

2013-10-11

Modern cancer research often involves large datasets and the use of sophisticated statistical techniques. Together these add a heavy computational load to the analysis, which is often coupled with issues surrounding data accessibility. Connectivity mapping is an advanced bioinformatic and computational technique dedicated to therapeutics discovery and drug re-purposing around differential gene expression analysis. On a normal desktop PC, it is common for the connectivity mapping task with a single gene signature to take > 2h to complete using sscMap, a popular Java application that runs on standard CPUs (Central Processing Units). Here, we describe new software, cudaMap, which has been implemented using CUDA C/C++ to harness the computational power of NVIDIA GPUs (Graphics Processing Units) to greatly reduce processing times for connectivity mapping. cudaMap can identify candidate therapeutics from the same signature in just over thirty seconds when using an NVIDIA Tesla C2050 GPU. Results from the analysis of multiple gene signatures, which would previously have taken several days, can now be obtained in as little as 10 minutes, greatly facilitating candidate therapeutics discovery with high throughput. We are able to demonstrate dramatic speed differentials between GPU assisted performance and CPU executions as the computational load increases for high accuracy evaluation of statistical significance. Emerging 'omics' technologies are constantly increasing the volume of data and information to be processed in all areas of biomedical research. Embracing the multicore functionality of GPUs represents a major avenue of local accelerated computing. cudaMap will make a strong contribution in the discovery of candidate therapeutics by enabling speedy execution of heavy duty connectivity mapping tasks, which are increasingly required in modern cancer research. cudaMap is open source and can be freely downloaded from http://purl.oclc.org/NET/cudaMap.

Fast simulation of Proton Induced X-Ray Emission Tomography using CUDA

Energy Technology Data Exchange (ETDEWEB)

Beasley, D.G., E-mail: dgbeasley@itn.pt; Marques, A.C.; Alves, L.C.; Silva, R.C. da

2013-07-01

A new 3D Proton Induced X-Ray Emission Tomography (PIXE-T) and Scanning Transmission Ion Microscopy Tomography (STIM-T) simulation software has been developed in Java and uses NVIDIA™ Common Unified Device Architecture (CUDA) to calculate the X-ray attenuation for large detector areas. A challenge with PIXE-T is to get sufficient counts while retaining a small beam spot size. Therefore a high geometric efficiency is required. However, as the detector solid angle increases the calculations required for accurate reconstruction of the data increase substantially. To overcome this limitation, the CUDA parallel computing platform was used which enables general purpose programming of NVIDIA graphics processing units (GPUs) to perform computations traditionally handled by the central processing unit (CPU). For simulation performance evaluation, the results of a CPU- and a CUDA-based simulation of a phantom are presented. Furthermore, a comparison with the simulation code in the PIXE-Tomography reconstruction software DISRA (A. Sakellariou, D.N. Jamieson, G.J.F. Legge, 2001) is also shown. Compared to a CPU implementation, the CUDA based simulation is approximately 30× faster.

Fast simulation of Proton Induced X-Ray Emission Tomography using CUDA

International Nuclear Information System (INIS)

Beasley, D.G.; Marques, A.C.; Alves, L.C.; Silva, R.C. da

2013-01-01

A new 3D Proton Induced X-Ray Emission Tomography (PIXE-T) and Scanning Transmission Ion Microscopy Tomography (STIM-T) simulation software has been developed in Java and uses NVIDIA™ Common Unified Device Architecture (CUDA) to calculate the X-ray attenuation for large detector areas. A challenge with PIXE-T is to get sufficient counts while retaining a small beam spot size. Therefore a high geometric efficiency is required. However, as the detector solid angle increases the calculations required for accurate reconstruction of the data increase substantially. To overcome this limitation, the CUDA parallel computing platform was used which enables general purpose programming of NVIDIA graphics processing units (GPUs) to perform computations traditionally handled by the central processing unit (CPU). For simulation performance evaluation, the results of a CPU- and a CUDA-based simulation of a phantom are presented. Furthermore, a comparison with the simulation code in the PIXE-Tomography reconstruction software DISRA (A. Sakellariou, D.N. Jamieson, G.J.F. Legge, 2001) is also shown. Compared to a CPU implementation, the CUDA based simulation is approximately 30× faster

Benchmarking BarraCUDA on Epigenetic DNA and nVidia Pascal GPUs

OpenAIRE

Langdon, W

2016-01-01

Typically BarraCUDA uses CUDA graphics cards to map DNA reads to the human genome. Previously its software source code was genetically improved for short paired end next generation sequences. On longer, 150 base paired end noisy Cambridge Epigenetix's data, a Pascal GTX 1080 processes about 10000 strings per second, comparable with twin nVidia Tesla K40.

Performance Modeling in CUDA Streams - A Means for High-Throughput Data Processing.

Science.gov (United States)

Li, Hao; Yu, Di; Kumar, Anand; Tu, Yi-Cheng

2014-10-01

Push-based database management system (DBMS) is a new type of data processing software that streams large volume of data to concurrent query operators. The high data rate of such systems requires large computing power provided by the query engine. In our previous work, we built a push-based DBMS named G-SDMS to harness the unrivaled computational capabilities of modern GPUs. A major design goal of G-SDMS is to support concurrent processing of heterogenous query processing operations and enable resource allocation among such operations. Understanding the performance of operations as a result of resource consumption is thus a premise in the design of G-SDMS. With NVIDIA's CUDA framework as the system implementation platform, we present our recent work on performance modeling of CUDA kernels running concurrently under a runtime mechanism named CUDA stream . Specifically, we explore the connection between performance and resource occupancy of compute-bound kernels and develop a model that can predict the performance of such kernels. Furthermore, we provide an in-depth anatomy of the CUDA stream mechanism and summarize the main kernel scheduling disciplines in it. Our models and derived scheduling disciplines are verified by extensive experiments using synthetic and real-world CUDA kernels.

CUDA/GPU Technology : Parallel Programming For High Performance Scientific Computing

OpenAIRE

YUHENDRA; KUZE, Hiroaki; JOSAPHAT, Tetuko Sri Sumantyo

2009-01-01

[ABSTRACT]Graphics processing units (GP Us) originally designed for computer video cards have emerged as the most powerful chip in a high-performance workstation. In the high performance computation capabilities, graphic processing units (GPU) lead to much more powerful performance than conventional CPUs by means of parallel processing. In 2007, the birth of Compute Unified Device Architecture (CUDA) and CUDA-enabled GPUs by NVIDIA Corporation brought a revolution in the general purpose GPU a...

IMPROVING THE PERFORMANCE OF THE LINEAR SYSTEMS SOLVERS USING CUDA

Directory of Open Access Journals (Sweden)

BOGDAN OANCEA

2012-05-01

Full Text Available Parallel computing can offer an enormous advantage regarding the performance for very large applications in almost any field: scientific computing, computer vision, databases, data mining, and economics. GPUs are high performance many-core processors that can obtain very high FLOP rates. Since the first idea of using GPU for general purpose computing, things have evolved and now there are several approaches to GPU programming: CUDA from NVIDIA and Stream from AMD. CUDA is now a popular programming model for general purpose computations on GPU for C/C++ programmers. A great number of applications were ported to CUDA programming model and they obtain speedups of orders of magnitude comparing to optimized CPU implementations. In this paper we present an implementation of a library for solving linear systems using the CCUDA framework. We present the results of performance tests and show that using GPU one can obtain speedups of about of approximately 80 times comparing with a CPU implementation.

Spectral-element Seismic Wave Propagation on CUDA/OpenCL Hardware Accelerators

Science.gov (United States)

Peter, D. B.; Videau, B.; Pouget, K.; Komatitsch, D.

2015-12-01

Seismic wave propagation codes are essential tools to investigate a variety of wave phenomena in the Earth. Furthermore, they can now be used for seismic full-waveform inversions in regional- and global-scale adjoint tomography. Although these seismic wave propagation solvers are crucial ingredients to improve the resolution of tomographic images to answer important questions about the nature of Earth's internal processes and subsurface structure, their practical application is often limited due to high computational costs. They thus need high-performance computing (HPC) facilities to improving the current state of knowledge. At present, numerous large HPC systems embed many-core architectures such as graphics processing units (GPUs) to enhance numerical performance. Such hardware accelerators can be programmed using either the CUDA programming environment or the OpenCL language standard. CUDA software development targets NVIDIA graphic cards while OpenCL was adopted by additional hardware accelerators, like e.g. AMD graphic cards, ARM-based processors as well as Intel Xeon Phi coprocessors. For seismic wave propagation simulations using the open-source spectral-element code package SPECFEM3D_GLOBE, we incorporated an automatic source-to-source code generation tool (BOAST) which allows us to use meta-programming of all computational kernels for forward and adjoint runs. Using our BOAST kernels, we generate optimized source code for both CUDA and OpenCL languages within the source code package. Thus, seismic wave simulations are able now to fully utilize CUDA and OpenCL hardware accelerators. We show benchmarks of forward seismic wave propagation simulations using SPECFEM3D_GLOBE on CUDA/OpenCL GPUs, validating results and comparing performances for different simulations and hardware usages.

Optimization Specifications for CUDA Code Restructuring Tool

KAUST Repository

Khan, Ayaz

2017-01-01

and convert it into an optimized CUDA kernel with user directives in a configuration file for guiding the compiler. RTCUDA also allows transparent invocation of the most optimized external math libraries like cuSparse and cuBLAS enabling efficient design

Workflow of the Grover algorithm simulation incorporating CUDA and GPGPU

Science.gov (United States)

Lu, Xiangwen; Yuan, Jiabin; Zhang, Weiwei

2013-09-01

The Grover quantum search algorithm, one of only a few representative quantum algorithms, can speed up many classical algorithms that use search heuristics. No true quantum computer has yet been developed. For the present, simulation is one effective means of verifying the search algorithm. In this work, we focus on the simulation workflow using a compute unified device architecture (CUDA). Two simulation workflow schemes are proposed. These schemes combine the characteristics of the Grover algorithm and the parallelism of general-purpose computing on graphics processing units (GPGPU). We also analyzed the optimization of memory space and memory access from this perspective. We implemented four programs on CUDA to evaluate the performance of schemes and optimization. Through experimentation, we analyzed the organization of threads suited to Grover algorithm simulations, compared the storage costs of the four programs, and validated the effectiveness of optimization. Experimental results also showed that the distinguished program on CUDA outperformed the serial program of libquantum on a CPU with a speedup of up to 23 times (12 times on average), depending on the scale of the simulation.

IMPLEMENTATION OF OBJECT TRACKING ALGORITHMS ON THE BASIS OF CUDA TECHNOLOGY

Directory of Open Access Journals (Sweden)

B. A. Zalesky

2014-01-01

Full Text Available A fast version of correlation algorithm to track objects on video-sequences made by a nonstabilized camcorder is presented. The algorithm is based on comparison of local correlations of the object image and regions of video-frames. The algorithm is implemented in programming technology CUDA. Application of CUDA allowed to attain real time execution of the algorithm. To improve its precision and stability, a robust version of the Kalman filter has been incorporated into the flowchart. Tests showed applicability of the algorithm to practical object tracking.

High Performance Processing and Analysis of Geospatial Data Using CUDA on GPU

Directory of Open Access Journals (Sweden)

STOJANOVIC, N.

2014-11-01

Full Text Available In this paper, the high-performance processing of massive geospatial data on many-core GPU (Graphic Processing Unit is presented. We use CUDA (Compute Unified Device Architecture programming framework to implement parallel processing of common Geographic Information Systems (GIS algorithms, such as viewshed analysis and map-matching. Experimental evaluation indicates the improvement in performance with respect to CPU-based solutions and shows feasibility of using GPU and CUDA for parallel implementation of GIS algorithms over large-scale geospatial datasets.

Multi–GPU Implementation of Machine Learning Algorithm using CUDA and OpenCL

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Jan Masek

2016-06-01

Full Text Available Using modern Graphic Processing Units (GPUs becomes very useful for computing complex and time consuming processes. GPUs provide high–performance computation capabilities with a good price. This paper deals with a multi–GPU OpenCL and CUDA implementations of k–Nearest Neighbor (k–NN algorithm. This work compares performances of OpenCLand CUDA implementations where each of them is suitable for different number of used attributes. The proposed CUDA algorithm achieves acceleration up to 880x in comparison witha single thread CPU version. The common k-NN was modified to be faster when the lower number of k neighbors is set. The performance of algorithm was verified with two GPUs dual-core NVIDIA GeForce GTX 690 and CPU Intel Core i7 3770 with 4.1 GHz frequency. The results of speed up were measured for one GPU, two GPUs, three and four GPUs. We performed several tests with data sets containing up to 4 million elements with various number of attributes.

Türkiye’de Meslek Liselerinde Öğrenci Takip Sistemi ve Nesne Tabanlı Analizi

OpenAIRE

Özkaya, Mert; Korkmaz, Özgür

2017-01-01

Mesleki ve Teknik Anadolu Liseleri 130’dan fazla mesleki alanda eğitim vermektedir. Öğrenciler, okul idaresi kılavuzluğunda öğretmenler tarafından kontrol edilir ve her işyeri ziyaretinde öğretmenler tarafından, öğrenciler hakkında raporlar tutulur. Bu kayıtların, bir veri tabanı yönetim sistemi kullanılarak dijital olarak saklanması kâğıt üzerinde saklanmasından daha faydalıdır. Bu yazı ile Türkiye’deki Mesleki ve Teknik Anadolu Liselerinde yürütülen staj sistemi takip edilerek; var olan sis...

DiVinE-CUDA - A Tool for GPU Accelerated LTL Model Checking

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Jiří Barnat

2009-12-01

Full Text Available In this paper we present a tool that performs CUDA accelerated LTL Model Checking. The tool exploits parallel algorithm MAP adjusted to the NVIDIA CUDA architecture in order to efficiently detect the presence of accepting cycles in a directed graph. Accepting cycle detection is the core algorithmic procedure in automata-based LTL Model Checking. We demonstrate that the tool outperforms non-accelerated version of the algorithm and we discuss where the limits of the tool are and what we intend to do in the future to avoid them.

Performance comparison of OpenCL and CUDA by benchmarking an optimized perspective backprojection

Energy Technology Data Exchange (ETDEWEB)

Swall, Stefan; Ritschl, Ludwig; Knaup, Michael; Kachelriess, Marc [Erlangen-Nuernberg Univ., Erlangen (Germany). Inst. of Medical Physics (IMP)

2011-07-01

The increase in performance of Graphical Processing Units (GPUs) and the onward development of dedicated software tools within the last decade allows to transfer performance-demanding computations from the Central Processing Unit (CPU) to the GPU and to speed up certain tasks by utilizing the massiv parallel architecture of these devices. The Computate Unified Device Architecture (CUDA) developed by NVIDIA provides an easy hence effective way to develop application that target NVIDIA GPUs. It has become one of the cardinal software tools for this purpose. Recently the Open Computing Language (OpenCL) became available that is neither vendor-specific nor limited to GPUs only. As the benefits of CUDA-based image reconstruction are well known we aim at providing a comparison between the performance that can be achieved with CUDA in comparison to OpenCL by benchmarking the time required to perform a simple but computationally demanding task: the perspective backprojection. (orig.)

MALBEC: a new CUDA-C ray-tracer in general relativity

Science.gov (United States)

Quiroga, G. D.

2018-06-01

A new CUDA-C code for tracing orbits around non-charged black holes is presented. This code, named MALBEC, take advantage of the graphic processing units and the CUDA platform for tracking null and timelike test particles in Schwarzschild and Kerr. Also, a new general set of equations that describe the closed circular orbits of any timelike test particle in the equatorial plane is derived. These equations are extremely important in order to compare the analytical behavior of the orbits with the numerical results and verify the correct implementation of the Runge-Kutta algorithm in MALBEC. Finally, other numerical tests are performed, demonstrating that MALBEC is able to reproduce some well-known results in these metrics in a faster and more efficient way than a conventional CPU implementation.

4kUHD H264 Wireless Live Video Streaming Using CUDA

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A. O. Adeyemi-Ejeye

2014-01-01

Full Text Available Ultrahigh definition video streaming has been explored in recent years. Most recently the possibility of 4kUHD video streaming over wireless 802.11n was presented, using preencoded video. Live encoding for streaming using x264 has proven to be very slow. The use of parallel encoding has been explored to speed up the process using CUDA. However there hasnot been a parallel implementation for video streaming. We therefore present for the first time a novel implementation of 4kUHD live encoding for streaming over a wireless network at low bitrate indoors, using CUDA for parallel H264 encoding. Our experimental results are used to verify our claim.

Graphic filter library implemented in CUDA language

OpenAIRE

Peroutková, Hedvika

2009-01-01

This thesis deals with the problem of reducing computation time of raster image processing by parallel computing on graphics processing unit. Raster image processing thereby refers to the application of graphic filters, which can be applied in sequence with different settings. This thesis evaluates the suitability of using parallelization on graphic card for raster image adjustments based on multicriterial choice. Filters are implemented for graphics processing unit in CUDA language. Opacity ...

CUDA vs. OpenCL: uma comparação teórica e tecnológica

Directory of Open Access Journals (Sweden)

Lauro Cássio Martins de Paula

2014-08-01

Full Text Available Apresenta-se neste trabalho uma comparação entre duas arquiteturas para computação paralela: Compute Unified Device Architecture (CUDA e Open Computing Language (OpenCL. Alguns trabalhos na literatura apresentaram uma comparação de desempenho computacional entre as duas arquiteturas. Entretanto, ainda não existe algum artigo recente e completo que destaca claramente qual arquitetura pode ser considerada a mais eficiente. O objetivo deste trabalho é realizar uma comparação apenas em nível de hardware, software, tendências tecnológicas e facilidades de utilização, evidenciando aquela que pode apresentar o melhor desempenho de uma maneira geral. Para tal, descreve-se os principais trabalhos que já fizeram uso de pelo menos uma das arquiteturas. Observou-se que, por ser um sistema heterogêneo, a escolha do OpenCL pode parecer mais óbvia. No entanto, foi possível concluir que CUDA, apesar de poder ser utilizada apenas nas placas gráficas da NVIDIA®, tem sido uma referência e mais utilizada ultimamente.Palavras-chave: CUDA. OpenCL. GPU.Cuda vs. Opencl: a theoretical and technological comparisonAbstractThis paper presents a comparison between two architectures for parallel computing: Compute Unified Device Architecture (CUDA and Open Computing Language (OpenCL. Some works in the literature have presented a computational performance comparison of the two architectures. However, there is not some complete and recent paper that highlights clearly which architecture can be considered the most efficient. The goal is to make a comparison only in level of hardware, software, technological trends and ease of use, highlighting one that may present the best cost-effective in general. To this end, we describe the main works that have used at least one of the architectures. It was observed that the choice of OpenCL may seem more obvious for being a heterogeneous system. Nevertheless, it was concluded that CUDA, although it can be used only in

[Research on fast implementation method of image Gaussian RBF interpolation based on CUDA].

Science.gov (United States)

Chen, Hao; Yu, Haizhong

2014-04-01

Image interpolation is often required during medical image processing and analysis. Although interpolation method based on Gaussian radial basis function (GRBF) has high precision, the long calculation time still limits its application in field of image interpolation. To overcome this problem, a method of two-dimensional and three-dimensional medical image GRBF interpolation based on computing unified device architecture (CUDA) is proposed in this paper. According to single instruction multiple threads (SIMT) executive model of CUDA, various optimizing measures such as coalesced access and shared memory are adopted in this study. To eliminate the edge distortion of image interpolation, natural suture algorithm is utilized in overlapping regions while adopting data space strategy of separating 2D images into blocks or dividing 3D images into sub-volumes. Keeping a high interpolation precision, the 2D and 3D medical image GRBF interpolation achieved great acceleration in each basic computing step. The experiments showed that the operative efficiency of image GRBF interpolation based on CUDA platform was obviously improved compared with CPU calculation. The present method is of a considerable reference value in the application field of image interpolation.

Study of the acceleration of nuclide burnup calculation using GPU with CUDA

International Nuclear Information System (INIS)

Okui, S.; Ohoka, Y.; Tatsumi, M.

2009-01-01

The computation costs of neutronics calculation code become higher as physics models and methods are complicated. The degree of them in neutronics calculation tends to be limited due to available computing power. In order to open a door to the new world, use of GPU for general purpose computing, called GPGPU, has been studied [1]. GPU has multi-threads computing mechanism enabled with multi-processors which realize mush higher performance than CPUs. NVIDIA recently released the CUDA language for general purpose computation which is a C-like programming language. It is relatively easy to learn compared to the conventional ones used for GPGPU, such as OpenGL or CG. Therefore application of GPU to the numerical calculation became much easier. In this paper, we tried to accelerate nuclide burnup calculation, which is important to predict nuclides time dependence in the core, using GPU with CUDA. We chose the 4.-order Runge-Kutta method to solve the nuclide burnup equation. The nuclide burnup calculation and the 4.-order Runge-Kutta method were suitable to the first step of introduction CUDA into numerical calculation because these consist of simple operations of matrices and vectors of single precision where actual codes were written in the C++ language. Our experimental results showed that nuclide burnup calculations with GPU have possibility of speedup by factor of 100 compared to that with CPU. (authors)

CPU and GPU (Cuda Template Matching Comparison

Directory of Open Access Journals (Sweden)

Evaldas Borcovas

2014-05-01

Full Text Available Image processing, computer vision or other complicated opticalinformation processing algorithms require large resources. It isoften desired to execute algorithms in real time. It is hard tofulfill such requirements with single CPU processor. NVidiaproposed CUDA technology enables programmer to use theGPU resources in the computer. Current research was madewith Intel Pentium Dual-Core T4500 2.3 GHz processor with4 GB RAM DDR3 (CPU I, NVidia GeForce GT320M CUDAcompliable graphics card (GPU I and Intel Core I5-2500K3.3 GHz processor with 4 GB RAM DDR3 (CPU II, NVidiaGeForce GTX 560 CUDA compatible graphic card (GPU II.Additional libraries as OpenCV 2.1 and OpenCV 2.4.0 CUDAcompliable were used for the testing. Main test were made withstandard function MatchTemplate from the OpenCV libraries.The algorithm uses a main image and a template. An influenceof these factors was tested. Main image and template have beenresized and the algorithm computing time and performancein Gtpix/s have been measured. According to the informationobtained from the research GPU computing using the hardwarementioned earlier is till 24 times faster when it is processing abig amount of information. When the images are small the performanceof CPU and GPU are not significantly different. Thechoice of the template size makes influence on calculating withCPU. Difference in the computing time between the GPUs canbe explained by the number of cores which they have.

Exploring Parallel Algorithms for Volumetric Mass-Spring-Damper Models in CUDA

DEFF Research Database (Denmark)

Rasmusson, Allan; Mosegaard, Jesper; Sørensen, Thomas Sangild

2008-01-01

) from Nvidia. This paper investigates multiple implementations of volumetric Mass-Spring-Damper systems in CUDA. The obtained performance is compared to previous implementations utilizing the GPU through the OpenGL graphics API. We find that both performance and optimization strategies differ widely...

Integral physics data for fast-reactor design; Donnees de physique integrale intervenant dans les etudes de reacteur a neutrons rapides; Integral'nye fizicheskie dannye dlya raschetov reaktorov na bystrykh nejtronakh; Datos fisicos integrales para el diseno de reactores rapidos

Energy Technology Data Exchange (ETDEWEB)

Loewenstein, W B; Meneghetti, D [Argonne National Laboratory, Argonne, IL (United States)

1962-03-15

subcriticos, de las diversas magnitudes fisicas que presentan interes practico u/o teorico. Esas magnitudes fisicas caracterizan al sistema y permiten comprenderlo. Las mediciones mencionadas se refieren a la masa critica, el factor de forma del cuerpo, las razones de deteccion, los espectros neutronicos, los experimentos de sustitucion de materiales, la economia del reflector, la vida de los neutrones, el {alpha} de Rossi y otras magnitudes analogas. Los autores examinan estos datos y definen su campo de aplicacion. Demuestran que existen limites de validez para los resultados experimentales y analiticos en ciertos estudios espectrales y de criticidad. Proponen algunas investigaciones experimentales y analiticas que podrian constituir el objeto de futuros trabajos y que contribuirian a colmar la laguna entre la teoria y la experimentacion en los sistemas 'conocidos'. Al mismo tiempo, entre dichas investigaciones sugeridas se incluyen algunas tendientes a asentar sobre bases mas firmes la fisica de los modelos de reactores de potencia reproductores rapidos. (author) [Russian] Dlya sostavlennogo nedavno razdela o fizike reaktorov na bystrykh nejtronakh, kotoryj dolzhen vojti v vypuskaemoe vtoroe izdanie 'Postoyannye fiziki reaktorov', potrebovalos' sobrat' material po imeyushchimsya ehksperimental'ny m integral'nym dannym. Pri vklyuchenii v sostavlennyj razdel integral'nykh dannykh o fizike reaktorov na bystrykh nejtronakh, pomimo fakta ikh nalichiya, za osnovu byli vzyaty dva kriteriya: 1. ehti dannye polucheny iz otnositel'no prostykh sistem, kotorye pozvolyayut provodit' prostye teoreticheskie analizy; 2. slozhnye sistemy, kotorye yavlyayutsya prototipami ili modelyami, predstavlyayut osnovnoj interes dlya ehnergeticheskikh bystrykh reaktorov. Pervyj kriterij byl prinyat dlya togo, chtoby dat' perechen' integral'nykh dannykh takikh sistem, imeyushchikh ochen' obshchee primenenie dlya proverki parametrov secheniya i metodov raschetov. Vtoroj kriterij daet imeyushchiesya

Survey of using GPU CUDA programming model in medical image analysis

Directory of Open Access Journals (Sweden)

T. Kalaiselvi

2017-01-01

Full Text Available With the technology development of medical industry, processing data is expanding rapidly and computation time also increases due to many factors like 3D, 4D treatment planning, the increasing sophistication of MRI pulse sequences and the growing complexity of algorithms. Graphics processing unit (GPU addresses these problems and gives the solutions for using their features such as, high computation throughput, high memory bandwidth, support for floating-point arithmetic and low cost. Compute unified device architecture (CUDA is a popular GPU programming model introduced by NVIDIA for parallel computing. This review paper briefly discusses the need of GPU CUDA computing in the medical image analysis. The GPU performances of existing algorithms are analyzed and the computational gain is discussed. A few open issues, hardware configurations and optimization principles of existing methods are discussed. This survey concludes the few optimization techniques with the medical imaging algorithms on GPU. Finally, limitation and future scope of GPU programming are discussed.

Malezya Sağlık Sistemi

OpenAIRE

Che Musa, Muhd Firdaus

2017-01-01

Malezya siyasi ve ekonomik istikrarın yaşandığı bir üst ortagelirli ülkedir. Malezyalı nüfus genelde genç, erişkin ve yaşlı olarakayrılabilir. Son yıllarda doğumda beklenen ömür yaşı 73 yıldır.Malezya, DSÖ, Güneydoğu Asya Uluslar Topluluğu (ASEAN) vediğerleri gibi uluslararası kuruluşlarla genel sağlık düzeyini geliştirmeçabasıyla çeşitli işbirliği ve ortaklıklar geliştirmiştir. Sonuç olarak, ülkeiyi gelişmiş bir sağlık sistemi, temiz su ve sanitasyona kolay erişim, aynızamanda güçlü sosyal v...

Argo_CUDA: Exhaustive GPU based approach for motif discovery in large DNA datasets.

Science.gov (United States)

Vishnevsky, Oleg V; Bocharnikov, Andrey V; Kolchanov, Nikolay A

2018-02-01

The development of chromatin immunoprecipitation sequencing (ChIP-seq) technology has revolutionized the genetic analysis of the basic mechanisms underlying transcription regulation and led to accumulation of information about a huge amount of DNA sequences. There are a lot of web services which are currently available for de novo motif discovery in datasets containing information about DNA/protein binding. An enormous motif diversity makes their finding challenging. In order to avoid the difficulties, researchers use different stochastic approaches. Unfortunately, the efficiency of the motif discovery programs dramatically declines with the query set size increase. This leads to the fact that only a fraction of top "peak" ChIP-Seq segments can be analyzed or the area of analysis should be narrowed. Thus, the motif discovery in massive datasets remains a challenging issue. Argo_Compute Unified Device Architecture (CUDA) web service is designed to process the massive DNA data. It is a program for the detection of degenerate oligonucleotide motifs of fixed length written in 15-letter IUPAC code. Argo_CUDA is a full-exhaustive approach based on the high-performance GPU technologies. Compared with the existing motif discovery web services, Argo_CUDA shows good prediction quality on simulated sets. The analysis of ChIP-Seq sequences revealed the motifs which correspond to known transcription factor binding sites.

Beni comuni, sistemi comunitari e usi civici: riflessioni a partire da un caso regionale

Directory of Open Access Journals (Sweden)

Fabio Parascandolo

2016-07-01

In tempi di crisi dei modelli di sviluppo locale, questi sistemi di utilizzo delle risorse mostrano rilevanti aspetti di adeguatezza sociale ed ecologica. Vale la pena di riconsiderare il recupero di questi schemi organizzativi, ed è inoltre importante intraprendere un approccio approfondito ai loro caratteri civici, per mettere in evidenza le relazioni tra pratiche di comunanza e problematiche relative allo sfruttamento delle risorse naturali rinnovabili.

QDP-JIT/PTX: A QDP++ Implementation for CUDA-Enabled GPUs

Energy Technology Data Exchange (ETDEWEB)

Winter, Frank T. [JLAB; Edwards, Robert G. [JLAB

2014-11-01

These proceedings describe briefly the QDP-JIT/PTX framework for lattice field theory calcula- tions on the CUDA architecture. The framework generates compute kernels in the PTX assembler language which can be compiled to efficient GPU machine code by the NVIDIA JIT compiler. A comprehensive memory management was added to the framework so that applications, e.g. Chroma, can run unaltered on GPU clusters and supercomputers.

Application of the Characteristic Basis Function Method Using CUDA

Directory of Open Access Journals (Sweden)

Juan Ignacio Pérez

2014-01-01

Full Text Available The characteristic basis function method (CBFM is a popular technique for efficiently solving the method of moments (MoM matrix equations. In this work, we address the adaptation of this method to a relatively new computing infrastructure provided by NVIDIA, the Compute Unified Device Architecture (CUDA, and take into account some of the limitations which appear when the geometry under analysis becomes too big to fit into the Graphics Processing Unit’s (GPU’s memory.

Research of the fast data processing method for the Infrared fourier transform imaging spectrometer based on CUDA architecture

Science.gov (United States)

Yu, Chunchao; Du, Debiao; Xia, Fei; Huang, Xiaobo; Zheng, Weijian; Yan, Min; Lei, Zhenggang

2017-10-01

The windowing static spectrometer has the advantage of high spectral resolution and high flux. Then combined the spectrometer reconstruction processing algorithms with the new computer technology CUDA, for the large spectral data and the suitable of being processed in parallel lines. Researched the parallel algorithms and programming including the cube data access, restructuring , filtering, mirroring and FFT. The results show that, compared with the traditional spectral reconstruction algorithms, CUDA-based spectral reconstruction has been greatly speeds up the spectral reconstruction.

3D Tomographic Image Reconstruction using CUDA C

International Nuclear Information System (INIS)

Dominguez, J. S.; Assis, J. T.; Oliveira, L. F. de

2011-01-01

This paper presents the study and implementation of a software for three dimensional reconstruction of images obtained with a tomographic system using the capabilities of Graphic Processing Units(GPU). The reconstruction by filtered back-projection method was developed using the CUDA C, for maximum utilization of the processing capabilities of GPUs to solve computational problems with large computational cost and highly parallelizable. It was discussed the potential of GPUs and shown its advantages to solving this kind of problems. The results in terms of runtime will be compared with non-parallelized implementations and must show a great reduction of processing time. (Author)

Application of the opportunities of tool system 'CUDA' for graphic processors programming in scientific and technical calculation tasks

International Nuclear Information System (INIS)

Dudnik, V.A.; Kudryavtsev, V.I.; Sereda, T.M.; Us, S.A.; Shestakov, M.V.

2009-01-01

The opportunities of technology CUDA (Compute Unified Device Architecture - the unified hardware-software decision for parallel calculations on GPU)of the company NVIDIA were described. The basic differences of the programming language 'C' for GPU from 'usual' language 'C' were selected. The examples of CUDA usage for acceleration of development of applications and realization of algorithms of scientific and technical calculations were given which are carried out by the means of graphic processors (GPGPU) of accelerators GeForce of the eighth generation. The recommendations on optimization of the programs using GPU were resulted.

Hypergraph partitioning implementation for parallelizing matrix-vector multiplication using CUDA GPU-based parallel computing

Science.gov (United States)

Murni, Bustamam, A.; Ernastuti, Handhika, T.; Kerami, D.

2017-07-01

Calculation of the matrix-vector multiplication in the real-world problems often involves large matrix with arbitrary size. Therefore, parallelization is needed to speed up the calculation process that usually takes a long time. Graph partitioning techniques that have been discussed in the previous studies cannot be used to complete the parallelized calculation of matrix-vector multiplication with arbitrary size. This is due to the assumption of graph partitioning techniques that can only solve the square and symmetric matrix. Hypergraph partitioning techniques will overcome the shortcomings of the graph partitioning technique. This paper addresses the efficient parallelization of matrix-vector multiplication through hypergraph partitioning techniques using CUDA GPU-based parallel computing. CUDA (compute unified device architecture) is a parallel computing platform and programming model that was created by NVIDIA and implemented by the GPU (graphics processing unit).

Applying of the NVIDIA CUDA to the video processing in the task of the roundwood volume estimation

Directory of Open Access Journals (Sweden)

Kruglov Artem

2016-01-01

Full Text Available The paper is devoted to the parallel computing. The algorithm for roundwood volume estimation had insufficient performance so it was decided to port its bottleneck part on the GPU. The analysis of various GPGPU techniques was observed and the NVIDIA CUDA technology was chosen for implementation. The results of the research have shown the high potential of the GPU implementation in the improvement performance of the computation. The speedup of the algorithm for the roundwood volume estimation is more than 300% after porting on GPU with implementation of the CUDA technology. This helps to apply the machine vision algorithm in real-time system.

On the design of a demo for exhibiting rCUDA

OpenAIRE

Reaño González, Carlos; Pérez López, Ferrán; Silla Jiménez, Federico

2015-01-01

© 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. CUDA is a technology developed by NVIDIA which provides a parallel computing platform and programming mo...

Performance modeling and optimization of sparse matrix-vector multiplication on NVIDIA CUDA platform

NARCIS (Netherlands)

Xu, S.; Xue, W.; Lin, H.X.

2011-01-01

In this article, we discuss the performance modeling and optimization of Sparse Matrix-Vector Multiplication (SpMV) on NVIDIA GPUs using CUDA. SpMV has a very low computation-data ratio and its performance is mainly bound by the memory bandwidth. We propose optimization of SpMV based on ELLPACK from

Image Quality Improvement on OpenGL-Based Animations by Using CUDA Architecture

Directory of Open Access Journals (Sweden)

Taner UÇKAN

2016-04-01

Full Text Available 2D or 3D rendering technology is used for graphically modelling many physical phenomena occurring in real life by means of the computers. On the other hand, the ever-increasing intensity of the graphics applications require that the image quality of the so-called modellings is enhanced and they are performed more quickly. In this direction, a new software and hardware-based architecture called CUDA has been introduced by Nvidia at the end of 2006. Thanks to this architecture, larger number of graphics processors has started contributing towards the parallel solutions of the general-purpose problems. In this study, this new parallel computing architecture is taken into consideration and an animation application consisting of humanoid robots with different behavioral characteristics is developed using the OpenGL library in C++. This animation is initially implemented on a single serial CPU and then parallelized using the CUDA architecture. Eventually, the serial and the parallel versions of the same animation are compared against each other on the basis of the number of image frames per second. The results reveal that the parallel application is by far the best yielding high quality images.

CudaFilters: A SignalPlant library for GPU-accelerated FFT and FIR filtering

Czech Academy of Sciences Publication Activity Database

Nejedlý, Petr; Plešinger, Filip; Halámek, Josef; Jurák, Pavel

2018-01-01

Roč. 48, č. 1 (2018), s. 3-9 ISSN 0038-0644 R&D Projects: GA ČR GA17-13830S; GA MŠk(CZ) LO1212; GA MŠk ED0017/01/01 Institutional support: RVO:68081731 Keywords : CUDA * FFT filter * FIR filter * GPU acceleration * SignalPlant Impact factor: 1.609, year: 2016

Advanced mathematical on-line analysis in nuclear experiments. Usage of parallel computing CUDA routines in standard root analysis

Science.gov (United States)

Grzeszczuk, A.; Kowalski, S.

2015-04-01

Compute Unified Device Architecture (CUDA) is a parallel computing platform developed by Nvidia for increase speed of graphics by usage of parallel mode for processes calculation. The success of this solution has opened technology General-Purpose Graphic Processor Units (GPGPUs) for applications not coupled with graphics. The GPGPUs system can be applying as effective tool for reducing huge number of data for pulse shape analysis measures, by on-line recalculation or by very quick system of compression. The simplified structure of CUDA system and model of programming based on example Nvidia GForce GTX580 card are presented by our poster contribution in stand-alone version and as ROOT application.

Synergia CUDA: GPU-accelerated accelerator modeling package

International Nuclear Information System (INIS)

Lu, Q; Amundson, J

2014-01-01

Synergia is a parallel, 3-dimensional space-charge particle-in-cell accelerator modeling code. We present our work porting the purely MPI-based version of the code to a hybrid of CPU and GPU computing kernels. The hybrid code uses the CUDA platform in the same framework as the pure MPI solution. We have implemented a lock-free collaborative charge-deposition algorithm for the GPU, as well as other optimizations, including local communication avoidance for GPUs, a customized FFT, and fine-tuned memory access patterns. On a small GPU cluster (up to 4 Tesla C1070 GPUs), our benchmarks exhibit both superior peak performance and better scaling than a CPU cluster with 16 nodes and 128 cores. We also compare the code performance on different GPU architectures, including C1070 Tesla and K20 Kepler.

Stochastic first passage time accelerated with CUDA

Science.gov (United States)

Pierro, Vincenzo; Troiano, Luigi; Mejuto, Elena; Filatrella, Giovanni

2018-05-01

The numerical integration of stochastic trajectories to estimate the time to pass a threshold is an interesting physical quantity, for instance in Josephson junctions and atomic force microscopy, where the full trajectory is not accessible. We propose an algorithm suitable for efficient implementation on graphical processing unit in CUDA environment. The proposed approach for well balanced loads achieves almost perfect scaling with the number of available threads and processors, and allows an acceleration of about 400× with a GPU GTX980 respect to standard multicore CPU. This method allows with off the shell GPU to challenge problems that are otherwise prohibitive, as thermal activation in slowly tilted potentials. In particular, we demonstrate that it is possible to simulate the switching currents distributions of Josephson junctions in the timescale of actual experiments.

Projector and backprojector for iterative CT reconstruction with blobs using CUDA

Energy Technology Data Exchange (ETDEWEB)

Bippus, Rolf-Dieter; Koehler, Thomas; Bergner, Frank; Brendel, Bernhard; Proksa, Roland [Philips Research Laboratories, Hamburg (Germany); Hansis, Eberhard [Philips Healthcare, Nuclear Medicine, San Jose, CA (United States)

2011-07-01

Using blobs allows modeling the CT system's geometry more correctly within an iterative reconstruction framework. However their application comes with an increased computational demand. This led us to use blobs for image representation and a dedicated GPU hardware implementation to counteract their computational demand. Making extensive use of the texture interpolation capabilities of CUDA and implementing an asymmetric projector/backprojector pair we achieve reasonable processing times and good system modeling at the same time. (orig.)

GAMUT: GPU accelerated microRNA analysis to uncover target genes through CUDA-miRanda

Science.gov (United States)

2014-01-01

Background Non-coding sequences such as microRNAs have important roles in disease processes. Computational microRNA target identification (CMTI) is becoming increasingly important since traditional experimental methods for target identification pose many difficulties. These methods are time-consuming, costly, and often need guidance from computational methods to narrow down candidate genes anyway. However, most CMTI methods are computationally demanding, since they need to handle not only several million query microRNA and reference RNA pairs, but also several million nucleotide comparisons within each given pair. Thus, the need to perform microRNA identification at such large scale has increased the demand for parallel computing. Methods Although most CMTI programs (e.g., the miRanda algorithm) are based on a modified Smith-Waterman (SW) algorithm, the existing parallel SW implementations (e.g., CUDASW++ 2.0/3.0, SWIPE) are unable to meet this demand in CMTI tasks. We present CUDA-miRanda, a fast microRNA target identification algorithm that takes advantage of massively parallel computing on Graphics Processing Units (GPU) using NVIDIA's Compute Unified Device Architecture (CUDA). CUDA-miRanda specifically focuses on the local alignment of short (i.e., ≤ 32 nucleotides) sequences against longer reference sequences (e.g., 20K nucleotides). Moreover, the proposed algorithm is able to report multiple alignments (up to 191 top scores) and the corresponding traceback sequences for any given (query sequence, reference sequence) pair. Results Speeds over 5.36 Giga Cell Updates Per Second (GCUPs) are achieved on a server with 4 NVIDIA Tesla M2090 GPUs. Compared to the original miRanda algorithm, which is evaluated on an Intel Xeon E5620@2.4 GHz CPU, the experimental results show up to 166 times performance gains in terms of execution time. In addition, we have verified that the exact same targets were predicted in both CUDA-miRanda and the original mi

A high performance GPU implementation of Surface Energy Balance System (SEBS) based on CUDA-C

NARCIS (Netherlands)

Abouali, Mohammad; Timmermans, J.; Castillo, Jose E.; Su, Zhongbo

2013-01-01

This paper introduces a new implementation of the Surface Energy Balance System (SEBS) algorithm harnessing the many cores available on Graphics Processing Units (GPUs). This new implementation uses Compute Unified Device Architecture C (CUDA-C) programming model and is designed to be executed on a

CUDA Accelerated Multi-domain Volumetric Image Segmentation and Using a Higher Order Level Set Method

DEFF Research Database (Denmark)

Sharma, Ojaswa; Anton, François; Zhang, Qin

2009-01-01

-manding in terms of computation and memory space, we employ a CUDA based fast GPU segmentation and provide accuracy measures compared with an equivalent CPU implementation. Our resulting surfaces are C2-smooth resulting from tri-cubic spline interpolation algorithm. We also provide error bounds...

Advanced mathematical on-line analysis in nuclear experiments. Usage of parallel computing CUDA routines in standard root analysis

Directory of Open Access Journals (Sweden)

Grzeszczuk A.

2015-01-01

Full Text Available Compute Unified Device Architecture (CUDA is a parallel computing platform developed by Nvidia for increase speed of graphics by usage of parallel mode for processes calculation. The success of this solution has opened technology General-Purpose Graphic Processor Units (GPGPUs for applications not coupled with graphics. The GPGPUs system can be applying as effective tool for reducing huge number of data for pulse shape analysis measures, by on-line recalculation or by very quick system of compression. The simplified structure of CUDA system and model of programming based on example Nvidia GForce GTX580 card are presented by our poster contribution in stand-alone version and as ROOT application.

Optimasi Rendering Game 2D Asteroids Menggunakan Pemrograman CUDA

Directory of Open Access Journals (Sweden)

Fathony Teguh Irawan

2017-12-01

There are many sources for having fun, one of them is through video game. Public interest on video game is proven by the large number of video game user. Therefore, the performance of video game is considered to expand the market. One of many ways to improve performance is using GPU processing. The way to prove that GPU processing is faster than CPU processing on parallel process is by comparing the result of GPU processing and CPU processing. This paper describes the differences in performance of video game that is implemented using GPU approach and CPU approach. Keywords: games, video game, game development, CPU, GPU, CUDA, optimization, analysis

Accelerating Smith-Waterman Algorithm for Biological Database Search on CUDA-Compatible GPUs

Science.gov (United States)

Munekawa, Yuma; Ino, Fumihiko; Hagihara, Kenichi

This paper presents a fast method capable of accelerating the Smith-Waterman algorithm for biological database search on a cluster of graphics processing units (GPUs). Our method is implemented using compute unified device architecture (CUDA), which is available on the nVIDIA GPU. As compared with previous methods, our method has four major contributions. (1) The method efficiently uses on-chip shared memory to reduce the data amount being transferred between off-chip video memory and processing elements in the GPU. (2) It also reduces the number of data fetches by applying a data reuse technique to query and database sequences. (3) A pipelined method is also implemented to overlap GPU execution with database access. (4) Finally, a master/worker paradigm is employed to accelerate hundreds of database searches on a cluster system. In experiments, the peak performance on a GeForce GTX 280 card reaches 8.32 giga cell updates per second (GCUPS). We also find that our method reduces the amount of data fetches to 1/140, achieving approximately three times higher performance than a previous CUDA-based method. Our 32-node cluster version is approximately 28 times faster than a single GPU version. Furthermore, the effective performance reaches 75.6 giga instructions per second (GIPS) using 32 GeForce 8800 GTX cards.

Hayvan Islahında Güncel Bir Yaklaşım: CRISPR/Cas9 Genom Modifikasyon Sistemi

Directory of Open Access Journals (Sweden)

Fatih Bilgi

2016-12-01

Full Text Available Genom modifikasyonları, verimin arttırılmasında ve hastalıklara karşı direncin kazandırılması konusunda önemli avantajlar sağlama potansiyeli içermektedir. Bireyin zaten sahip olduğu bir genin susturulmasını ya da ifade edilmesini sağlayan gen düzenlenmesi yöntemleri (gene editing çevreyi en az etkileyerek genetik yapının geliştirilmesi konusunda önemli olanaklar sağlamaktadır. Son zamanlarda yeni genetik düzenleme yöntemleri geliştirilmiştir. Bunlar ZFN (Zinc Finger Nuclease’ler, TALEN (Transcription Activator-like Effector Nuclease’ler ve CRISPR/Cas nükleaz sistemleridir. CRISPR/Cas sistemi yabancı genetik materyalleri yok etmek için RNA güdümlü nükleazları kullanan bir mikrobiyal immün sistem olup, bu sistemin günümüzde hayvanlarda basit ve etkili bir gen düzenleme mekanizması olarak kullanılabilme potansiyeli değerlendirilmektedir. Bu derlemede CRISPR/Cas9 sistemi ve hayvan ıslahında kullanılabilirliği özetlenmiştir.

Introduzione all'analisi qualitativa dei sistemi dinamici discreti e continui

CERN Document Server

Squassina, Marco

2016-01-01

Il testo è stato concepito per la struttura degli attuali corsi di laurea in Biologia, Matematica, Matematica Applicata, Ingegneria, Scienze Naturali e Mediche. Esso si concentra sugli aspetti qualitativi delle equazioni differenziali come limitatezza o illimitatezza delle soluzioni, esistenza o non esistenza di orbite periodiche, stabilità o instabilità dei punti di equilibrio, biforcazione del sistema al variare di un parametro, robustezza del sistema in presenza di perturbazioni. L'analisi qualitativa di sistemi dinamici discreti e continui è un argomento tecnicamente accessibile anche agli studenti di primo livello e consente di collegare, combinare ed esercitare nozioni che provengono dall'algebra, dal calcolo differenziale di base e dalla geometria elementare, stimolando l'intuizione matematica. Il volume si caratterizza per due aspetti: quello induttivo e quello figurativo. L'approccio induttivo si basa su un'ampia gamma di problemi risolti e pensati per introdurre, gradualmente, sia le conoscenze ...

Status of computational and experimental correlations for Los Alamos fast-neutron critical assemblies; Correlation entre les calculs et les experiences sur les ensembles critiques a neutrons rapides de Los Alamos; Sostoyanie vychislitel'nykh i ehksperimental'nykh korrelyatsij dlya Los-Alamosskoj kriticheskoj sistemy na bystrykh nejtronakh; Conjuntos criticos de neutrones rapidos de Los Alamos; correlacion entre resultados calculados y experimentales

Energy Technology Data Exchange (ETDEWEB)

Hansen, G E [Los Alamos Scientific Laboratory, University of California, Los Alamos, NM (United States)

1962-03-15

conjuntos de {sup 233}U en geometria esferica sin reflector o con un reflector constituido por una espesa capa de uranio. El autor expondra correlaciones directas entre los datos experimentales, para indicar que existe a priori la posibilidad de alcanzar correlaciones satisfactorias con los datos calculados. Tambien presentara, para diversos conjuntos tipicos y a fin de establecer los detalles de calculo necesarios la sensitividad de los espestros calculados y de los tamanos criticos a los modelos de transporte nsutronico (aproximaciones de transporte e hipotesis de proporcionalidad) y a las aproximacione s aritmeticas (hipotesis de la segmentacion angular finita y representacione s de grupos multiples). Las comparaciones entre los resultados experimentales y las evaluasiones se refieren a los indices espectrales y a los tamanos criticos, asi como a los periodos de semidesintegracion y a las razones correspondientes a los neutrones retardados. (author) [Russian] Novye sistemy i uluchshennaya izmeritel'naya tekhnika predusmatrivayu t periodicheskij peresmotr sostoyaniya vychislenij v zavisimosti ot ehksperimenta. Sleduet podcherknut' vazhnost' nejtronno-spektral'nykh kharakteristik iz-za osobenno trudnorazreshimykh problem, svyazannykhs absolyutnym izmereniem spektral'nykh indeksov i neobkhodimost'yu proverok vychislenij sverkh prostogo kriticheskogo razmera. Postoyannoe uluchshenie izmereniya spektral'nykh indeksov vmeste s uvelicheniem tochnosti kak mikroskopicheskikh dannykh dlya detektora i materialov sborok, tak i vychislitel'noj tekhniki, privodit k postepennomu proyasneniyu kharakteristik gruppy kriticheskikh sistem na bystrykh nejtronakh. Ehta gruppa sejchas vklyuchaet aktivnye zony s U{sup 233} bez otrazhatelya i s tolstym uranovym otrazhatelem. Pryamaya korrelyatsiya sredi ehksperimental'ny kh dannykh budet predstavlena s tsel'yu ukazat' predshestvuyushchi e vozmozhnosti dlya uspeshnykh korrelyatsij s vychisleniem. Budet predstavlena chuvstvitel

CUDT: A CUDA Based Decision Tree Algorithm

Directory of Open Access Journals (Sweden)

Win-Tsung Lo

2014-01-01

Full Text Available Decision tree is one of the famous classification methods in data mining. Many researches have been proposed, which were focusing on improving the performance of decision tree. However, those algorithms are developed and run on traditional distributed systems. Obviously the latency could not be improved while processing huge data generated by ubiquitous sensing node in the era without new technology help. In order to improve data processing latency in huge data mining, in this paper, we design and implement a new parallelized decision tree algorithm on a CUDA (compute unified device architecture, which is a GPGPU solution provided by NVIDIA. In the proposed system, CPU is responsible for flow control while the GPU is responsible for computation. We have conducted many experiments to evaluate system performance of CUDT and made a comparison with traditional CPU version. The results show that CUDT is 5∼55 times faster than Weka-j48 and is 18 times speedup than SPRINT for large data set.

CUDASW++2.0: enhanced Smith-Waterman protein database search on CUDA-enabled GPUs based on SIMT and virtualized SIMD abstractions

Directory of Open Access Journals (Sweden)

Schmidt Bertil

2010-04-01

Full Text Available Abstract Background Due to its high sensitivity, the Smith-Waterman algorithm is widely used for biological database searches. Unfortunately, the quadratic time complexity of this algorithm makes it highly time-consuming. The exponential growth of biological databases further deteriorates the situation. To accelerate this algorithm, many efforts have been made to develop techniques in high performance architectures, especially the recently emerging many-core architectures and their associated programming models. Findings This paper describes the latest release of the CUDASW++ software, CUDASW++ 2.0, which makes new contributions to Smith-Waterman protein database searches using compute unified device architecture (CUDA. A parallel Smith-Waterman algorithm is proposed to further optimize the performance of CUDASW++ 1.0 based on the single instruction, multiple thread (SIMT abstraction. For the first time, we have investigated a partitioned vectorized Smith-Waterman algorithm using CUDA based on the virtualized single instruction, multiple data (SIMD abstraction. The optimized SIMT and the partitioned vectorized algorithms were benchmarked, and remarkably, have similar performance characteristics. CUDASW++ 2.0 achieves performance improvement over CUDASW++ 1.0 as much as 1.74 (1.72 times using the optimized SIMT algorithm and up to 1.77 (1.66 times using the partitioned vectorized algorithm, with a performance of up to 17 (30 billion cells update per second (GCUPS on a single-GPU GeForce GTX 280 (dual-GPU GeForce GTX 295 graphics card. Conclusions CUDASW++ 2.0 is publicly available open-source software, written in CUDA and C++ programming languages. It obtains significant performance improvement over CUDASW++ 1.0 using either the optimized SIMT algorithm or the partitioned vectorized algorithm for Smith-Waterman protein database searches by fully exploiting the compute capability of commonly used CUDA-enabled low-cost GPUs.

High performance direct gravitational N-body simulations on graphics processing units II: An implementation in CUDA

NARCIS (Netherlands)

Belleman, R.G.; Bédorf, J.; Portegies Zwart, S.F.

2008-01-01

We present the results of gravitational direct N-body simulations using the graphics processing unit (GPU) on a commercial NVIDIA GeForce 8800GTX designed for gaming computers. The force evaluation of the N-body problem is implemented in "Compute Unified Device Architecture" (CUDA) using the GPU to

CUDA-Accelerated Geodesic Ray-Tracing for Fiber Tracking

Directory of Open Access Journals (Sweden)

Evert van Aart

2011-01-01

Full Text Available Diffusion Tensor Imaging (DTI allows to noninvasively measure the diffusion of water in fibrous tissue. By reconstructing the fibers from DTI data using a fiber-tracking algorithm, we can deduce the structure of the tissue. In this paper, we outline an approach to accelerating such a fiber-tracking algorithm using a Graphics Processing Unit (GPU. This algorithm, which is based on the calculation of geodesics, has shown promising results for both synthetic and real data, but is limited in its applicability by its high computational requirements. We present a solution which uses the parallelism offered by modern GPUs, in combination with the CUDA platform by NVIDIA, to significantly reduce the execution time of the fiber-tracking algorithm. Compared to a multithreaded CPU implementation of the same algorithm, our GPU mapping achieves a speedup factor of up to 40 times.

Sistemi tecnologici innovativi di involucro per il recupero del patrimonio edilizio recente. L'edilizia scolastica nel Comune di Bologna

OpenAIRE

Mazzoli, Cecilia

2015-01-01

La ricerca è volta a presentare un nuovo approccio integrato, a supporto di operatori e progettisti, per la gestione dell’intero processo progettuale di interventi di riqualificazione energetica e architettonica del patrimonio edilizio recente, mediante l’impiego di soluzioni tecnologiche innovative di involucro edilizio. Lo studio richiede necessariamente l’acquisizione di un repertorio selezionato di sistemi costruttivi di involucro, come base di partenza per l’elaborazione di soluzioni ...

Porting and optimizing MAGFLOW on CUDA

Directory of Open Access Journals (Sweden)

Ciro Del Negro

2011-12-01

Full Text Available The MAGFLOW lava simulation model is a cellular automaton developed by the Sezione di Catania of the Istituto Nazionale di Geofisica e Vulcanologia (INGV and it represents the peak of the evolution of cell-based models for lava-flow simulation. The accuracy and adherence to reality achieved by the physics-based cell evolution of MAGFLOW comes at the cost of significant computational times for long-running simulations. The present study describes the efforts and results obtained by porting the original serial code to the parallel computational platforms offered by modern video cards, and in particular to the NVIDIA Compute Unified Device Architecture (CUDA. A number of optimization strategies that have been used to achieve optimal performance on a graphic processing units (GPU are also discussed. The actual benefits of running on the GPU rather than the central processing unit depends on the extent and duration of the simulated event; for large, long-running simulations, the GPU can be 70-to-80-times faster, while for short-lived eruptions with a small extents the speed improvements obtained are 40-to-50 times.

Parallel computing for data science with examples in R, C++ and CUDA

CERN Document Server

Matloff, Norman

2015-01-01

Parallel Computing for Data Science: With Examples in R, C++ and CUDA is one of the first parallel computing books to concentrate exclusively on parallel data structures, algorithms, software tools, and applications in data science. It includes examples not only from the classic ""n observations, p variables"" matrix format but also from time series, network graph models, and numerous other structures common in data science. The examples illustrate the range of issues encountered in parallel programming.With the main focus on computation, the book shows how to compute on three types of platfor

Online measurement for geometrical parameters of wheel set based on structure light and CUDA parallel processing

Science.gov (United States)

Wu, Kaihua; Shao, Zhencheng; Chen, Nian; Wang, Wenjie

2018-01-01

The wearing degree of the wheel set tread is one of the main factors that influence the safety and stability of running train. Geometrical parameters mainly include flange thickness and flange height. Line structure laser light was projected on the wheel tread surface. The geometrical parameters can be deduced from the profile image. An online image acquisition system was designed based on asynchronous reset of CCD and CUDA parallel processing unit. The image acquisition was fulfilled by hardware interrupt mode. A high efficiency parallel segmentation algorithm based on CUDA was proposed. The algorithm firstly divides the image into smaller squares, and extracts the squares of the target by fusion of k_means and STING clustering image segmentation algorithm. Segmentation time is less than 0.97ms. A considerable acceleration ratio compared with the CPU serial calculation was obtained, which greatly improved the real-time image processing capacity. When wheel set was running in a limited speed, the system placed alone railway line can measure the geometrical parameters automatically. The maximum measuring speed is 120km/h.

GPU accelerated fuzzy connected image segmentation by using CUDA.

Science.gov (United States)

Zhuge, Ying; Cao, Yong; Miller, Robert W

2009-01-01

Image segmentation techniques using fuzzy connectedness principles have shown their effectiveness in segmenting a variety of objects in several large applications in recent years. However, one problem of these algorithms has been their excessive computational requirements when processing large image datasets. Nowadays commodity graphics hardware provides high parallel computing power. In this paper, we present a parallel fuzzy connected image segmentation algorithm on Nvidia's Compute Unified Device Architecture (CUDA) platform for segmenting large medical image data sets. Our experiments based on three data sets with small, medium, and large data size demonstrate the efficiency of the parallel algorithm, which achieves a speed-up factor of 7.2x, 7.3x, and 14.4x, correspondingly, for the three data sets over the sequential implementation of fuzzy connected image segmentation algorithm on CPU.

CUDA accelerated simulation of needle insertions in deformable tissue

International Nuclear Information System (INIS)

Patriciu, Alexandru

2012-01-01

This paper presents a stiff needle-deformable tissue interaction model. The model uses a mesh-less discretization of continuum; avoiding thus the expensive remeshing required by the finite element models. The proposed model can accommodate both linear and nonlinear material characteristics. The needle-deformable tissue interaction is modeled through fundamental boundaries. The forces applied by the needle on the tissue are divided in tangent forces and constraint forces. The constraint forces are adaptively computed such that the material is properly constrained by the needle. The implementation is accelerated using NVidia CUDA. We present detailed analysis of the execution timing in both serial and parallel case. The proposed needle insertion model was integrated in a custom software that loads DICOM images, generate the deformable model, and can simulate different insertion strategies.

Accelerating the reconstruction of magnetic resonance imaging by three-dimensional dual-dictionary learning using CUDA.

Science.gov (United States)

Jiansen Li; Jianqi Sun; Ying Song; Yanran Xu; Jun Zhao

2014-01-01

An effective way to improve the data acquisition speed of magnetic resonance imaging (MRI) is using under-sampled k-space data, and dictionary learning method can be used to maintain the reconstruction quality. Three-dimensional dictionary trains the atoms in dictionary in the form of blocks, which can utilize the spatial correlation among slices. Dual-dictionary learning method includes a low-resolution dictionary and a high-resolution dictionary, for sparse coding and image updating respectively. However, the amount of data is huge for three-dimensional reconstruction, especially when the number of slices is large. Thus, the procedure is time-consuming. In this paper, we first utilize the NVIDIA Corporation's compute unified device architecture (CUDA) programming model to design the parallel algorithms on graphics processing unit (GPU) to accelerate the reconstruction procedure. The main optimizations operate in the dictionary learning algorithm and the image updating part, such as the orthogonal matching pursuit (OMP) algorithm and the k-singular value decomposition (K-SVD) algorithm. Then we develop another version of CUDA code with algorithmic optimization. Experimental results show that more than 324 times of speedup is achieved compared with the CPU-only codes when the number of MRI slices is 24.

Utrinki s konference "Sistemi in trendi v izobraževanju odraslih"

Directory of Open Access Journals (Sweden)

Dušana Findeisen

2000-12-01

Full Text Available Izobraževanje odraslih ne poteka v praznem prostoru. Tako kot druge prakse in vede drži zrcalo družbenemu, ekonomskemu ter političnemu položaju in razvoju družbe. V njem se zrcalijo družbena razmerja in odsevajo duhovne predstave, pa tudi kulturni dosežki in vrednote posameznega družbenega okolja. Še več, sistem je temelj, ki spodbuja in omejuje razvoj izobraževanja odraslih. Vprašanja sistema in razvoja izobraževanja odraslih v različnih državah smo obravnavali na konferenci Sistemi in trendi v izobraževanju odraslih. Konferenca je potekala v Balatonalmadi na Madžarskem v organizaciji madžarskega inštituta za kulturo in Lazsla Harangija, človeka z razvitim smislom za animacijo ljudi.

Elastic Alignment of Microscopic Images Using Parallel Processing on CUDA-Supported Graphics Processor Units

Czech Academy of Sciences Publication Activity Database

Michálek, Jan; Čapek, M.; Janáček, Jiří; Kubínová, Lucie

2010-01-01

Roč. 16, Suppl.2 (2010), s. 730-731 ISSN 1431-9276. [Microscopy and Microanalysis 2010. Portland, 01.08.2010-05.08.2010] R&D Projects: GA ČR(CZ) GA102/08/0691; GA ČR(CZ) GA304/09/0733; GA MŠk(CZ) LC06063 Institutional research plan: CEZ:AV0Z50110509 Keywords : elastic alignment * CUDA * confocal microscopy Subject RIV: JD - Computer Applications, Robotics Impact factor: 2.179, year: 2010

Decision making information systems and data base management; Applicazioni dei sistemi di supporto alle decisioni manageriali in un ente fortemente decentrato. Sviluppo di un prototipo per la valutazione di nuovi progetti

Energy Technology Data Exchange (ETDEWEB)

Minelle, F [Rome, Univ. ` La Sapienza` (Italy). Fac. di Scienze Matematiche, Fisiche e Naturali; Di Marco, R A [ENEA, Rome (Italy). Funzione Centrale Informatica; Belli, A

1997-01-01

In these years Information Technology has been used in activities that require an intelligent intervention. In this context take placing Decision Support Systems, since they use Information Technology to support users in decision processes, that is problems of logical level greater then problems normally treated by traditional information systems. The purpose of this work is to describe Decision Support Systems specifying what they are, their functionally and structure, identifying, furthermore, user types referred to and interaction modality between them; and to present a prototype of these systems. From a preliminary analyses phase of ENEA being and its Information Systems to understand which topics can be supported by systems of this type, it deals with one of these topics: weighing of new project, finding parameters, or key quantity, that affect and determine decisions. It describes, then, models, conceived form parameters, that permit to the user, through a simple representation of results, to evaluates advantages and disadvantages of a new project. From models, analyses of data necessary to models and from requisites of simplicity and use fullness of user interface, it has been carried out a prototype. For this purpose it has been followed the Sprague and Carlson model that provides a data base, a Model Base and a Software System. [Italiano] In questi anni si sta assistendo ad un utilizzo dell`informatica in attivita` che richiedono un intervento `intelligente`. In tale contesto si collocano i Sistemi di Supporto alle Decisioni, poiche` utilizzano le tecnologie informatiche per supportare l`utente in processi decisionali, quindi problemi di livello logico piu` elevato di quelli trattati dai tradizionali sistemi informativi. Il presente lavoro ha lo scopo di descrivere i Sistemi di Supporto alle Decisioni specificando cosa sono, le loro funzionalita` e la loro struttura, individuando, inoltre, i tipi di utenti a cui sono rivolti e le modalita` di interazione

GPU accelerated study of heat transfer and fluid flow by lattice Boltzmann method on CUDA

Science.gov (United States)

Ren, Qinlong

,000 US dollars. The release of NVIDIA's CUDA architecture which includes both hardware and programming environment in 2007 makes GPU computing attractive. Due to its highly parallel nature, lattice Boltzmann method is successfully ported into GPU with a performance benefit during the recent years. In the current work, LBM CUDA code is developed for different fluid flow and heat transfer problems. In this dissertation, lattice Boltzmann method and immersed boundary method are used to study natural convection in an enclosure with an array of conduting obstacles, double-diffusive convection in a vertical cavity with Soret and Dufour effects, PCM melting process in a latent heat thermal energy storage system with internal fins, mixed convection in a lid-driven cavity with a sinusoidal cylinder, and AC electrothermal pumping in microfluidic systems on a CUDA computational platform. It is demonstrated that LBM is an efficient method to simulate complex heat transfer problems using GPU on CUDA.

CELES: CUDA-accelerated simulation of electromagnetic scattering by large ensembles of spheres

Science.gov (United States)

Egel, Amos; Pattelli, Lorenzo; Mazzamuto, Giacomo; Wiersma, Diederik S.; Lemmer, Uli

2017-09-01

CELES is a freely available MATLAB toolbox to simulate light scattering by many spherical particles. Aiming at high computational performance, CELES leverages block-diagonal preconditioning, a lookup-table approach to evaluate costly functions and massively parallel execution on NVIDIA graphics processing units using the CUDA computing platform. The combination of these techniques allows to efficiently address large electrodynamic problems (>104 scatterers) on inexpensive consumer hardware. In this paper, we validate near- and far-field distributions against the well-established multi-sphere T-matrix (MSTM) code and discuss the convergence behavior for ensembles of different sizes, including an exemplary system comprising 105 particles.

CUDASW++: optimizing Smith-Waterman sequence database searches for CUDA-enabled graphics processing units

Directory of Open Access Journals (Sweden)

Maskell Douglas L

2009-05-01

Full Text Available Abstract Background The Smith-Waterman algorithm is one of the most widely used tools for searching biological sequence databases due to its high sensitivity. Unfortunately, the Smith-Waterman algorithm is computationally demanding, which is further compounded by the exponential growth of sequence databases. The recent emergence of many-core architectures, and their associated programming interfaces, provides an opportunity to accelerate sequence database searches using commonly available and inexpensive hardware. Findings Our CUDASW++ implementation (benchmarked on a single-GPU NVIDIA GeForce GTX 280 graphics card and a dual-GPU GeForce GTX 295 graphics card provides a significant performance improvement compared to other publicly available implementations, such as SWPS3, CBESW, SW-CUDA, and NCBI-BLAST. CUDASW++ supports query sequences of length up to 59K and for query sequences ranging in length from 144 to 5,478 in Swiss-Prot release 56.6, the single-GPU version achieves an average performance of 9.509 GCUPS with a lowest performance of 9.039 GCUPS and a highest performance of 9.660 GCUPS, and the dual-GPU version achieves an average performance of 14.484 GCUPS with a lowest performance of 10.660 GCUPS and a highest performance of 16.087 GCUPS. Conclusion CUDASW++ is publicly available open-source software. It provides a significant performance improvement for Smith-Waterman-based protein sequence database searches by fully exploiting the compute capability of commonly used CUDA-enabled low-cost GPUs.

Theory of isotope scanning; Theorie de l'Exploration par les Radioisotopes; Teoriya meditsinskikh issledovanij s primeneniem izotopov; Teoria de la exploracion mediante radioisotopos

Energy Technology Data Exchange (ETDEWEB)

Brownell, G L [Physics Research Laboratory, Massachusetts General Hospital, Boston, MA (United States)

1959-07-01

aspecto del empleo de los radioisotopos en la medicina. El autor compara los esquemas de sensibilidad de diversos sistemas de colimacion y calcula su eficacia y su poder de resolucion. Los sistemas de coliminacion de que se trata se componen de orificios cilindricos y cenicos, de colimadores de enfoque y de dispositivos que permitan detectar por coincidencia las radiaciones de aniquilacion. Formula una teoria general con miras a establecer la concentracion optima de isotopos para cada uno de los sistemas. El autor enuncia una teoria analoga con respecto a la camara de centelleo, y compara la concentracion optima de isotopos para este dispositivo en relacion con los resultados logrados con ayuda de los distintos metodos de exploracion. Estudia tambien la posibilidad de modificar el principio de la camara a fin de utilizarla en la deteccion de las radiaciones de aniquilacion. Para terminar, compara diversos sistemas de registre desde el punto de vista de su eficacia y de la presentacion de los datos. (author) [Russian] Vozmozhnost' tochno ustanovit' raspredelenie izotopov yavlyaetsya vazhnym aspektom ispol'zovaniya ikh v meditsine. Sravnivaetsya stepen' chuvstvitel'nosti razlichnykh sistem kollimirovaniya, ustanavlivaetsya ikh ehffektivnost' i razreshayushchaya sposobnost'. Rassmatrivaemye kollimiruyushchie sistemy sostoyat iz tsilindricheskikh i konusnykh otverstij, fokusiruyushchikh kollimatorov i prispo-soblenij dlya obnaruzheniya annigilyatsionnogo izlucheniya metodom sovpadenij. Vyrabatyvaetsya obshchaya teoriya s tsel'yu ustanovit' optimal'nuyu kontsentratsiyu izotopov dlya kazhdoj iz ehtikh sistem. Podobnaya zhe teoriya razrabatyvaetsya i dlya stsintillyatsionnoj kamery; pro voditsya sravnenie optimal'noj kontsentratsii izotopov ehtogo pribora v svyazi s primenyaemymi metodami issledovaniya. Obsuzhdaetsya vopros ob izmenenii printsipa dejstviya kamery v tselyakh ispol'zovaniya ee pri nalichii annigilya-tsionnogo izlucheniya. Sravnivayutsya razlichnye sistemy

Analisi sperimentale dell’efficacia di sistemi frangisole per ridurre la pressione sonora in facciata - Experimental analysis on the sound protection given by the external shading systems attached to the building façade

Directory of Open Access Journals (Sweden)

Nicolò Zuccherini Martello

2016-10-01

Full Text Available L’utilizzo di sistemi frangisole è largamente diffuso nei nuovi edifici, ma le verifiche sul loro effetto sul campo sonoro in facciata sono ancora piuttosto limitate. Questo lavoro illustra i risultati di uno studio condotto in una camera semi-anecoica su un modello in scala reale di una porzione di facciata dotata di sistemi frangisole. Lo scopo era quello di verificare l’influenza sul livello sonoro in facciata di sistemi frangisole in differenti configurazioni (lamelle diversamente inclinate, con o senza rivestimento fonoassorbente. Le misure evidenziano che i frangisole con lamelle fonoassorbenti possono ridurre significativamente il livello sonoro sul piano della facciata. ------ The use of shading systems is quite widespread in new buildings, but their acoustic effect on the sound pressure level on building façades has generally not been considered. This work presents the results of an investigation on a 1:1 scale model of a louvers system, carried out in a semi-anechoic chamber. The aim was to analyze the changes in SPL on the façade given by the presence of the louvers in different configurations (three tilt angles of the louvers, with or without sound absorptive material. The measurements highlighted a slight increase in SPL on the façade when the standard louvers were installed, while the sound absorptive material gave an evident SPL reduction on the façade.

CUDA based Level Set Method for 3D Reconstruction of Fishes from Large Acoustic Data

DEFF Research Database (Denmark)

Sharma, Ojaswa; Anton, François

2009-01-01

Acoustic images present views of underwater dynamics, even in high depths. With multi-beam echo sounders (SONARs), it is possible to capture series of 2D high resolution acoustic images. 3D reconstruction of the water column and subsequent estimation of fish abundance and fish species identificat...... of suppressing threshold and show its convergence as the evolution proceeds. We also present a GPU based streaming computation of the method using NVIDIA's CUDA framework to handle large volume data-sets. Our implementation is optimised for memory usage to handle large volumes....

Gifted Education Database (GED: Information Management and Online Teacher Recommendation System / Üstün Yetenekliler Eğitimi Veri Bankası: Bilgi Yönetimi ve Online Öğretmen Değerlendirme Sistemi

Directory of Open Access Journals (Sweden)

Yewon Suh

2016-12-01

Full Text Available The purpose of the study is to explore the content and significance of the Gifted Education Database (GED, a Korean information service system for gifted education. The GED functions as: 1 an information management system and 2 a teacher recommendation system. The information management system collects and provides data in terms of statistics on institutions, teachers, and students, teaching and learning materials, and notifications. The teacher recommendation system helps teachers to recommend students through an on-line system. It also assists in the student selection process by providing users a step-by-step interface specifically designed for each stage. Overall, as a comprehensive collective information system in gifted education, the GED supports policy making on providing appropriate educational experiences for the outstanding individuals, particularly those with disadvantaged socio-cultural background by providing reliable data at the national level. At the user level, it increases data accessibility and provides customized services for people concerned with gifted education. As a result, the GED connects information and people and is a driving force for national growth. Key Words: gifted education, database for gifted, Korean Information System Öz Bu çalışmanın amacı Kore’de üstün yetenekliler eğitimi bilgi servisi olan Üstün Yetenekliler Veri Tabanını (GED açıklayarak önemini ortaya koymaktır. GED’in iki işlevi vardır; 1 bilgi yönetim sistemi ve 2 öğretmen öneri sistemi. Bilgi yönetim sistemi olarak kurumlar, öğretmenler, öğrenciler, öğrenme ve öğretme materyalleri hakkında bilgiler ve duyurular toplanarak istatistikler halinde sunulur. Öğ- retmen öneri sistemi, online bir sistemle öğ- retmenlerin öğrencileri aday göstermelerine yardımcı olur. Ayrıca sistem, öğrenci seçme sürecinde kullanıcılara her aşama için özel olarak tasarlanmış bir ara-yüz ile adım adım yard

Sosyal bilgiler dersinde branş derslik sistemi uygulamasının öğretmen, öğrenci ve idareci görüşlerine göre değerlendirilmesi

OpenAIRE

Sayar, Pınar

2016-01-01

Araştırmanın amacı, Sosyal bilgiler dersinde branş derslik sistemi uygulamasını öğretmen, öğrenci ve idareci görüşlerine göre değerlendirmektir. Araştırmada nicel ve nitel metotların birlikte kullanıldığı karma yöntemin yakınsayan paralel deseni kullanılmıştır. Araştırmanın nicel boyutunda, tarama modeli; nitel boyutunda ise durum çalışması deseni kullanılmıştır. Araştırmanın evrenini, 2015-2016 eğitim öğretim yılında Bartın ilinde branş derslik sistemi uygulayan 27 ortaokul ve bu okullardaki...

3D Sensor-Based Obstacle Detection Comparing Octrees and Point clouds Using CUDA

Directory of Open Access Journals (Sweden)

K.B. Kaldestad

2012-10-01

Full Text Available This paper presents adaptable methods for achieving fast collision detection using the GPU and Nvidia CUDA together with Octrees. Earlier related work have focused on serial methods, while this paper presents a parallel solution which shows that there is a great increase in time if the number of operations is large. Two different models of the environment and the industrial robot are presented, the first is Octrees at different resolutions, the second is a point cloud representation. The relative merits of the two different world model representations are shown. In particular, the experimental results show the potential of adapting the resolution of the robot and environment models to the task at hand.

Heuristics for the Variable Sized Bin Packing Problem Using a Hybrid P-System and CUDA Architecture

OpenAIRE

AlEnezi, Qadha'a; AboElFotoh, Hosam; AlBdaiwi, Bader; AlMulla, Mohammad Ali

2016-01-01

The Variable Sized Bin Packing Problem has a wide range of application areas including packing, scheduling, and manufacturing. Given a list of items and variable sized bin types, the objective is to minimize the total size of the used bins. This problem is known to be NP-hard. In this article, we present two new heuristics for solving the problem using a new variation of P systems with active membranes, which we call a hybrid P system, implemented in CUDA. Our hybrid P-system model allows usi...

Development of High-speed Visualization System of Hypocenter Data Using CUDA-based GPU computing

Science.gov (United States)

Kumagai, T.; Okubo, K.; Uchida, N.; Matsuzawa, T.; Kawada, N.; Takeuchi, N.

2014-12-01

After the Great East Japan Earthquake on March 11, 2011, intelligent visualization of seismic information is becoming important to understand the earthquake phenomena. On the other hand, to date, the quantity of seismic data becomes enormous as a progress of high accuracy observation network; we need to treat many parameters (e.g., positional information, origin time, magnitude, etc.) to efficiently display the seismic information. Therefore, high-speed processing of data and image information is necessary to handle enormous amounts of seismic data. Recently, GPU (Graphic Processing Unit) is used as an acceleration tool for data processing and calculation in various study fields. This movement is called GPGPU (General Purpose computing on GPUs). In the last few years the performance of GPU keeps on improving rapidly. GPU computing gives us the high-performance computing environment at a lower cost than before. Moreover, use of GPU has an advantage of visualization of processed data, because GPU is originally architecture for graphics processing. In the GPU computing, the processed data is always stored in the video memory. Therefore, we can directly write drawing information to the VRAM on the video card by combining CUDA and the graphics API. In this study, we employ CUDA and OpenGL and/or DirectX to realize full-GPU implementation. This method makes it possible to write drawing information to the VRAM on the video card without PCIe bus data transfer: It enables the high-speed processing of seismic data. The present study examines the GPU computing-based high-speed visualization and the feasibility for high-speed visualization system of hypocenter data.

GPU acceleration for digitally reconstructed radiographs using bindless texture objects and CUDA/OpenGL interoperability.

Science.gov (United States)

Abdellah, Marwan; Eldeib, Ayman; Owis, Mohamed I

2015-01-01

This paper features an advanced implementation of the X-ray rendering algorithm that harnesses the giant computing power of the current commodity graphics processors to accelerate the generation of high resolution digitally reconstructed radiographs (DRRs). The presented pipeline exploits the latest features of NVIDIA Graphics Processing Unit (GPU) architectures, mainly bindless texture objects and dynamic parallelism. The rendering throughput is substantially improved by exploiting the interoperability mechanisms between CUDA and OpenGL. The benchmarks of our optimized rendering pipeline reflect its capability of generating DRRs with resolutions of 2048(2) and 4096(2) at interactive and semi interactive frame-rates using an NVIDIA GeForce 970 GTX device.

Using CUDA Technology for Defining the Stiffness Matrix in the Subspace of Eigenvectors

Directory of Open Access Journals (Sweden)

Yu. V. Berchun

2015-01-01

Full Text Available The aim is to improve the performance of solving a problem of deformable solid mechanics through the use of GPGPU. The paper describes technologies for computing systems using both a central and a graphics processor and provides motivation for using CUDA technology as the efficient one.The paper also analyses methods to solve the problem of defining natural frequencies and design waveforms, i.e. an iteration method in the subspace. The method includes several stages. The paper considers the most resource-hungry stage, which defines the stiffness matrix in the subspace of eigenforms and gives the mathematical interpretation of this stage.The GPU choice as a computing device is justified. The paper presents an algorithm for calculating the stiffness matrix in the subspace of eigenforms taking into consideration the features of input data. The global stiffness matrix is very sparse, and its size can reach tens of millions. Therefore, it is represented as a set of the stiffness matrices of the single elements of a model. The paper analyses methods of data representation in the software and selects the best practices for GPU computing.It describes the software implementation using CUDA technology to calculate the stiffness matrix in the subspace of eigenforms. Due to the input data nature, it is impossible to use the universal libraries of matrix computations (cuSPARSE and cuBLAS for loading the GPU. For efficient use of GPU resources in the software implementation, the stiffness matrices of elements are built in the block matrices of a special form. The advantages of using shared memory in GPU calculations are described.The transfer to the GPU computations allowed a twentyfold increase in performance (as compared to the multithreaded CPU-implementation on the model of middle dimensions (degrees of freedom about 2 million. Such an acceleration of one stage speeds up defining the natural frequencies and waveforms by the iteration method in a subspace

Rapid data processing for ultrafast X-ray computed tomography using scalable and modular CUDA based pipelines

Science.gov (United States)

Frust, Tobias; Wagner, Michael; Stephan, Jan; Juckeland, Guido; Bieberle, André

2017-10-01

Ultrafast X-ray tomography is an advanced imaging technique for the study of dynamic processes basing on the principles of electron beam scanning. A typical application case for this technique is e.g. the study of multiphase flows, that is, flows of mixtures of substances such as gas-liquidflows in pipelines or chemical reactors. At Helmholtz-Zentrum Dresden-Rossendorf (HZDR) a number of such tomography scanners are operated. Currently, there are two main points limiting their application in some fields. First, after each CT scan sequence the data of the radiation detector must be downloaded from the scanner to a data processing machine. Second, the current data processing is comparably time-consuming compared to the CT scan sequence interval. To enable online observations or use this technique to control actuators in real-time, a modular and scalable data processing tool has been developed, consisting of user-definable stages working independently together in a so called data processing pipeline, that keeps up with the CT scanner's maximal frame rate of up to 8 kHz. The newly developed data processing stages are freely programmable and combinable. In order to achieve the highest processing performance all relevant data processing steps, which are required for a standard slice image reconstruction, were individually implemented in separate stages using Graphics Processing Units (GPUs) and NVIDIA's CUDA programming language. Data processing performance tests on different high-end GPUs (Tesla K20c, GeForce GTX 1080, Tesla P100) showed excellent performance. Program Files doi:http://dx.doi.org/10.17632/65sx747rvm.1 Licensing provisions: LGPLv3 Programming language: C++/CUDA Supplementary material: Test data set, used for the performance analysis. Nature of problem: Ultrafast computed tomography is performed with a scan rate of up to 8 kHz. To obtain cross-sectional images from projection data computer-based image reconstruction algorithms must be applied. The

A Visual Approach to Investigating Shared and Global Memory Behavior of CUDA Kernels

KAUST Repository

Rosen, Paul

2013-01-01

We present an approach to investigate the memory behavior of a parallel kernel executing on thousands of threads simultaneously within the CUDA architecture. Our top-down approach allows for quickly identifying any significant differences between the execution of the many blocks and warps. As interesting warps are identified, we allow further investigation of memory behavior by visualizing the shared memory bank conflicts and global memory coalescence, first with an overview of a single warp with many operations and, subsequently, with a detailed view of a single warp and a single operation. We demonstrate the strength of our approach in the context of a parallel matrix transpose kernel and a parallel 1D Haar Wavelet transform kernel. © 2013 The Author(s) Computer Graphics Forum © 2013 The Eurographics Association and Blackwell Publishing Ltd.

A Visual Approach to Investigating Shared and Global Memory Behavior of CUDA Kernels

KAUST Repository

Rosen, Paul

2013-06-01

We present an approach to investigate the memory behavior of a parallel kernel executing on thousands of threads simultaneously within the CUDA architecture. Our top-down approach allows for quickly identifying any significant differences between the execution of the many blocks and warps. As interesting warps are identified, we allow further investigation of memory behavior by visualizing the shared memory bank conflicts and global memory coalescence, first with an overview of a single warp with many operations and, subsequently, with a detailed view of a single warp and a single operation. We demonstrate the strength of our approach in the context of a parallel matrix transpose kernel and a parallel 1D Haar Wavelet transform kernel. © 2013 The Author(s) Computer Graphics Forum © 2013 The Eurographics Association and Blackwell Publishing Ltd.

Finite difference numerical method for the superlattice Boltzmann transport equation and case comparison of CPU(C) and GPU(CUDA) implementations

Energy Technology Data Exchange (ETDEWEB)

Priimak, Dmitri

2014-12-01

We present a finite difference numerical algorithm for solving two dimensional spatially homogeneous Boltzmann transport equation which describes electron transport in a semiconductor superlattice subject to crossed time dependent electric and constant magnetic fields. The algorithm is implemented both in C language targeted to CPU and in CUDA C language targeted to commodity NVidia GPU. We compare performances and merits of one implementation versus another and discuss various software optimisation techniques.

Finite difference numerical method for the superlattice Boltzmann transport equation and case comparison of CPU(C) and GPU(CUDA) implementations

International Nuclear Information System (INIS)

Priimak, Dmitri

2014-01-01

We present a finite difference numerical algorithm for solving two dimensional spatially homogeneous Boltzmann transport equation which describes electron transport in a semiconductor superlattice subject to crossed time dependent electric and constant magnetic fields. The algorithm is implemented both in C language targeted to CPU and in CUDA C language targeted to commodity NVidia GPU. We compare performances and merits of one implementation versus another and discuss various software optimisation techniques

Fourier analysis of Solar atmospheric numerical simulations accelerated with GPUs (CUDA).

Science.gov (United States)

Marur, A.

2015-12-01

Solar dynamics from the convection zone creates a variety of waves that may propagate through the solar atmosphere. These waves are important in facilitating the energy transfer between the sun's surface and the corona as well as propagating energy throughout the solar system. How and where these waves are dissipated remains an open question. Advanced 3D numerical simulations have furthered our understanding of the processes involved. Fourier transforms to understand the nature of the waves by finding the frequency and wavelength of these waves through the simulated atmosphere, as well as the nature of their propagation and where they get dissipated. In order to analyze the different waves produced by the aforementioned simulations and models, Fast Fourier Transform algorithms will be applied. Since the processing of the multitude of different layers of the simulations (of the order of several 100^3 grid points) would be time intensive and inefficient on a CPU, CUDA, a computing architecture that harnesses the power of the GPU, will be used to accelerate the calculations.

Influence of intrinsic and extrinsic forces on 3D stress distribution using CUDA programming

Science.gov (United States)

Räss, Ludovic; Omlin, Samuel; Podladchikov, Yuri

2013-04-01

In order to have a better understanding of the influence of buoyancy (intrinsic) and boundary (extrinsic) forces in a nonlinear rheology due to a power law fluid, some basics needs to be explored through 3D numerical calculation. As first approach, the already studied Stokes setup of a rising sphere will be used to calibrate the 3D model. Far field horizontal tectonic stress is applied to the sphere, which generates a vertical acceleration, buoyancy driven. This simple and known setup allows some benchmarking performed through systematic runs. The relative importance of intrinsic and extrinsic forces producing the wide variety of rates and styles of deformation, including absence of deformation and generating 3D stress patterns, will be determined. Relation between vertical motion and power law exponent will also be explored. The goal of these investigations will be to run models having topography and density structure from geophysical imaging as input, and 3D stress field as output. The stress distribution in Swiss Alps and Plateau and its implication for risk analysis is one of the perspective for this research. In fact, proximity of the stress to the failure is fundamental for risk assessment. Sensitivity of this to the accurate topography representation can then be evaluated. The developed 3D numerical codes, tuned for mid-sized cluster, need to be optimized, especially while running good resolution in full 3D. Therefor, two largely used computing platforms, MATLAB and FORTRAN 90 are explored. Starting with an easy adaptable and as short as possible MATLAB code, which is then upgraded in order to reach higher performance in simulation times and resolution. A significant speedup using the rising NVIDIA CUDA technology and resources is also possible. Programming in C-CUDA, creating some synchronization feature, and comparing the results with previous runs, helps us to investigate the new speedup possibilities allowed through GPU parallel computing. These codes

Study on GPU Computing for SCOPE2 with CUDA

International Nuclear Information System (INIS)

Kodama, Yasuhiro; Tatsumi, Masahiro; Ohoka, Yasunori

2011-01-01

For improving safety and cost effectiveness of nuclear power plants, a core calculation code SCOPE2 has been developed, which adopts detailed calculation models such as the multi-group nodal SP3 transport calculation method in three-dimensional pin-by-pin geometry to achieve high predictability. However, it is difficult to apply the code to loading pattern optimizations since it requires much longer computation time than that of codes based on the nodal diffusion method which is widely used in core design calculations. In this study, we studied possibility of acceleration of SCOPE2 with GPU computing capability which has been recognized as one of the most promising direction of high performance computing. In the previous study with an experimental programming framework, it required much effort to convert the algorithms to ones which fit to GPU computation. It was found, however, that this conversion was tremendously difficult because of the complexity of algorithms and restrictions in implementation. In this study, to overcome this complexity, we utilized the CUDA programming environment provided by NVIDIA which is a versatile and flexible language as an extension to the C/C++ languages. It was confirmed that we could enjoy high performance without degradation of maintainability through test implementation of GPU kernels for neutron diffusion/simplified P3 equation solvers. (author)

Monte Carlo methods for neutron transport on graphics processing units using Cuda - 015

International Nuclear Information System (INIS)

Nelson, A.G.; Ivanov, K.N.

2010-01-01

This work examined the feasibility of utilizing Graphics Processing Units (GPUs) to accelerate Monte Carlo neutron transport simulations. First, a clean-sheet MC code was written in C++ for an x86 CPU and later ported to run on GPUs using NVIDIA's CUDA programming language. After further optimization, the GPU ran 21 times faster than the CPU code when using single-precision floating point math. This can be further increased with no additional effort if accuracy is sacrificed for speed: using a compiler flag, the speedup was increased to 22x. Further, if double-precision floating point math is desired for neutron tracking through the geometry, a speedup of 11x was obtained. The GPUs have proven to be useful in this study, but the current generation does have limitations: the maximum memory currently available on a single GPU is only 4 GB; the GPU RAM does not provide error-checking and correction; and the optimization required for large speedups can lead to confusing code. (authors)

Fast phase processing in off-axis holography by CUDA including parallel phase unwrapping.

Science.gov (United States)

Backoach, Ohad; Kariv, Saar; Girshovitz, Pinhas; Shaked, Natan T

2016-02-22

We present parallel processing implementation for rapid extraction of the quantitative phase maps from off-axis holograms on the Graphics Processing Unit (GPU) of the computer using computer unified device architecture (CUDA) programming. To obtain efficient implementation, we parallelized both the wrapped phase map extraction algorithm and the two-dimensional phase unwrapping algorithm. In contrast to previous implementations, we utilized unweighted least squares phase unwrapping algorithm that better suits parallelism. We compared the proposed algorithm run times on the CPU and the GPU of the computer for various sizes of off-axis holograms. Using the GPU implementation, we extracted the unwrapped phase maps from the recorded off-axis holograms at 35 frames per second (fps) for 4 mega pixel holograms, and at 129 fps for 1 mega pixel holograms, which presents the fastest processing framerates obtained so far, to the best of our knowledge. We then used common-path off-axis interferometric imaging to quantitatively capture the phase maps of a micro-organism with rapid flagellum movements.

Il ripensamento e la ridistribuzione suggeriti ai sistemi giuridici liberaldemocratici dalla naturale metamorfosi della domanda di libertà in materia religiosa

Directory of Open Access Journals (Sweden)

Sara Domianello

2011-04-01

Full Text Available Testo, corredato delle note, dell’intervento al secondo Convegno nazionale di studio dell’A.D.E.C. “Libertà religiosa tra declino o superamento dello Stato nazionale” (Macerata, 28-30 ottobre 2010, destinato alla pubblicazione degli Atti. SOMMARIO: 1. La retromarcia da ingranare (ovvero: il ripensamento circa l’opportunità di trasferire interamente la tutela dei diritti di libertà fondamentali dall’attività parlamentare a quella giurisprudenziale in senso lato – 2. La ristrutturazione da avviare (ovvero: la ridistribuzione delle competenze in materia di pubblico intervento a garanzia dei diritti di libertà in materia religiosa – 3. Il dato da cui muovere (ovvero: la metamorfosi della domanda di libertà in materia religiosa nei sistemi liberaldemocratici.

The study of urban systems by indicators. State of the art and implementation problems; Lo studio dei sistemi urbani attraverso indicatori. Stato dell'arte e problematiche operative

Energy Technology Data Exchange (ETDEWEB)

Del Ciello, R; Napoleoni, S [ENEA, Divisione Caratterizzazione dell' Ambiente e del Territorio, Centro Ricerche Casaccia, S. Maria di Galeria, RM (Italy)

2001-07-01

The purpose of this work is to define the state of the art about the problem of the indicators and their capability in reading and foreseeing the urban complexity. Therefore, the theoretical elaborations and the suggestions developed in the report try to convert the different contributions in the Italian and international literature in a frame-work, focusing on those arguments which assume a key role in the study of the urban areas: (a) the problematic definition of the administrative, physics and functional boarders of the cities; (b) the selection of the indicators that describe the urban areas; (c) the description and quality of life and of environment quality in the cities; (d) the sustainability in urban areas. [Italian] Il lavoro si propone di delineare lo stato dell'arte sul problema degli indicatori e sulla loro capacita' di leggere e prevedere la complessita' urbana. Le elaborazioni teoriche e i suggerimenti metodologici sviluppati nel rapporto tentano dunque di tradurre in protocolli di lavoro i diversi contributi prodotti negli ultimi anni nella letteratura italiana e internazionale concentrando in particolare l'attenzione su quei temi che all'interno dello studio dei sistemi urbani assumono un ruolo chiave: (a) la problematica definizione dei confini amministrativi, fisici e funzionali delle citta'; (b) la selezione degli indicatori che descrivono con piu' efficacia il sistema urbano; (c) le dimensioni e la misura della qualita' della vita e dell'ambiente nelle citta'; (d) la sostenibilita' all'interno dei sistemi urbani.

Use of alpha-radiation for the industrial measurement of surface weight; Utilisation du rayonnement alpha pour les mesures industrielles de poids superficiel; Primenenie al'fa-oblucheniya dlya promyshlennogo izmereniya vesa naruzhnogo pokrova; Empleo industrial de los rayos alfa para la medicion de pesos por unidad de superficie

Energy Technology Data Exchange (ETDEWEB)

Perette, J; Maugest, J [Compagnie d' Applications et Recherches Atomiques, Saint-Denis (France)

1962-01-15

los rayos alfa para llevar a cabo mediciones industriales del peso por unidad de superficie de materiales de espesor reducido. El aprovechamiento industrial de estas tecnicas pudo desarrollarse gracias al perfeccionamiento de nuevos aparatos que, si bien aplican tecnicas tradicionales, fueron especialmente disenados para el empleo de rayos alfa. Para compensar las variaciones de la capacidad de absorcion en el intervalo que media entre la fuente y el detector, es indispensable emplear un metodo diferencial de dos recorridos. La alimentacion de las camaras de ionizacion con corriente alterna permite utilizar circuitos de amplificacion y de deteccion alternos sin necesidad de transformar previamente la corriente de ionizacion. El intervalo de medicion abarca de 6 a 55 gramos por metro cuadrado, con una aproximacion del 1 por ciento en condiciones de perfecta estabilidad. Los autores describen el dispositivo completo utilizado para efectuar mediciones continuas en las maquinas industriales. La tecnica descrita puede adaptarse igualmente a los rayos beta. (author) [Russian] Vozmozhnosti ispol'zovaniya al'fa-oblucheniya dlya promyshlennogo izmereniya vesa naruzhnogo pokrova tonkikh materialov uzhe neodnokratno izlagalis'. Primenenie ehtikh metodov v promyshlennosti stalo vozmozhno blagodarya issledovaniyam, proizvedennym s pomoshch'yu novoj apparatury, kotoraya naryadu s ispol'zovaniem ee v obychnykh usloviyakh spetsial'no prisposoblena dlya primeneniya al'fa-oblucheniya. Primenenie differentsial'nogo metoda s dvumya kanalami neobkhodimo dlya uravnoveshivaniya kolebanij, kotorye mogut byt' pogloshcheny rasstoyaniem mezhdu istochnikom i detektorom. Peremennoe snabzhenie ionizatsionnykh kamer pozvolyaet ispol'zovat' pere- mennye usilitel'nye kontury i provodit' obnaruzhenie bez predvaritel'nogo prevrashcheniya ionizatsionnogo toka. Izmerenie provoditsya shkaloj s deleniem ot shesti do 55 grammov na kvadratnyj metr s tochnost'yu do odnogo protsenta v usloviyakh khoroshej

Radio frequency and electromagnetic fields exposure, health risk; Esposizione dell'uomo ai campi elettromagnetici prodotti dai sistemi di telefonia cellulare

Energy Technology Data Exchange (ETDEWEB)

Bernardi, P.; Cavagnaro, P.; Pisa, S.; Piuzzi, E. [Rome Unvi. (Italy). Dipt. di Ingegneria Elettronica

1999-08-01

Health risk for humane exposure at electromagnetic field generate from mobile telephones is very particular. In this work are presented the most important results of research. [Italian] La protezione dell'uomo dall'esposizione di campi elettromagnetici prodotti dai sistemi di telefonia mobile presenta caratteristiche del tutto particolari. Bisogna infatti considerare un duplice apetto: da un lato l'esposizione della popolazione ai campi prodotti dalle antenne trasmittenti delle stazioni radio base e, dall'altro, l'esposizione del singolo utente all'apparato portatile. Insieme all'esame di tali problemi, in questo lavoro vengono presentati i risultati piu' significativi delle ricerche fino ad oggi sviluppate per fornire una base razionale alle normative di protezione e si accenna all'attuale evoluzione della ricerca nel campo.

Distortion correction algorithm for UAV remote sensing image based on CUDA

International Nuclear Information System (INIS)

Wenhao, Zhang; Yingcheng, Li; Delong, Li; Changsheng, Teng; Jin, Liu

2014-01-01

In China, natural disasters are characterized by wide distribution, severe destruction and high impact range, and they cause significant property damage and casualties every year. Following a disaster, timely and accurate acquisition of geospatial information can provide an important basis for disaster assessment, emergency relief, and reconstruction. In recent years, Unmanned Aerial Vehicle (UAV) remote sensing systems have played an important role in major natural disasters, with UAVs becoming an important technique of obtaining disaster information. UAV is equipped with a non-metric digital camera with lens distortion, resulting in larger geometric deformation for acquired images, and affecting the accuracy of subsequent processing. The slow speed of the traditional CPU-based distortion correction algorithm cannot meet the requirements of disaster emergencies. Therefore, we propose a Compute Unified Device Architecture (CUDA)-based image distortion correction algorithm for UAV remote sensing, which takes advantage of the powerful parallel processing capability of the GPU, greatly improving the efficiency of distortion correction. Our experiments show that, compared with traditional CPU algorithms and regardless of image loading and saving times, the maximum acceleration ratio using our proposed algorithm reaches 58 times that using the traditional algorithm. Thus, data processing time can be reduced by one to two hours, thereby considerably improving disaster emergency response capability

Design and implementation of a hybrid MPI-CUDA model for the Smith-Waterman algorithm.

Science.gov (United States)

Khaled, Heba; Faheem, Hossam El Deen Mostafa; El Gohary, Rania

2015-01-01

This paper provides a novel hybrid model for solving the multiple pair-wise sequence alignment problem combining message passing interface and CUDA, the parallel computing platform and programming model invented by NVIDIA. The proposed model targets homogeneous cluster nodes equipped with similar Graphical Processing Unit (GPU) cards. The model consists of the Master Node Dispatcher (MND) and the Worker GPU Nodes (WGN). The MND distributes the workload among the cluster working nodes and then aggregates the results. The WGN performs the multiple pair-wise sequence alignments using the Smith-Waterman algorithm. We also propose a modified implementation to the Smith-Waterman algorithm based on computing the alignment matrices row-wise. The experimental results demonstrate a considerable reduction in the running time by increasing the number of the working GPU nodes. The proposed model achieved a performance of about 12 Giga cell updates per second when we tested against the SWISS-PROT protein knowledge base running on four nodes.

ACL2 Meets the GPU: Formalizing a CUDA-based Parallelizable All-Pairs Shortest Path Algorithm in ACL2

Directory of Open Access Journals (Sweden)

David S. Hardin

2013-04-01

Full Text Available As Graphics Processing Units (GPUs have gained in capability and GPU development environments have matured, developers are increasingly turning to the GPU to off-load the main host CPU of numerically-intensive, parallelizable computations. Modern GPUs feature hundreds of cores, and offer programming niceties such as double-precision floating point, and even limited recursion. This shift from CPU to GPU, however, raises the question: how do we know that these new GPU-based algorithms are correct? In order to explore this new verification frontier, we formalized a parallelizable all-pairs shortest path (APSP algorithm for weighted graphs, originally coded in NVIDIA's CUDA language, in ACL2. The ACL2 specification is written using a single-threaded object (stobj and tail recursion, as the stobj/tail recursion combination yields the most straightforward translation from imperative programming languages, as well as efficient, scalable executable specifications within ACL2 itself. The ACL2 version of the APSP algorithm can process millions of vertices and edges with little to no garbage generation, and executes at one-sixth the speed of a host-based version of APSP coded in C – a very respectable result for a theorem prover. In addition to formalizing the APSP algorithm (which uses Dijkstra's shortest path algorithm at its core, we have also provided capability that the original APSP code lacked, namely shortest path recovery. Path recovery is accomplished using a secondary ACL2 stobj implementing a LIFO stack, which is proven correct. To conclude the experiment, we ported the ACL2 version of the APSP kernels back to C, resulting in a less than 5% slowdown, and also performed a partial back-port to CUDA, which, surprisingly, yielded a slight performance increase.

Charge-storage techniques for pulse-height analysis; Techniques de stockage electrostatique pour l'analyse en amplitude d'impulsion; Metod nakopleniya zaryada dlya amplitudnogo analiza impul'sov; Tecnicas de almacenamiento de cargas para analisis de amplitud de impulsos

Energy Technology Data Exchange (ETDEWEB)

Costrell, L; Brueckmann, R E [National Bureau of Standards, Washington, DC (United States)

1962-04-15

investigaciones realizadas en el National Bureau of Standards (NBS). Los autores han construido un analizador de almacenamiento de cargas que se esta empleando con el sincrotron de 180 MeV del NBS en un experimento de absorcion nuclear que, sin ese aparato, presentaria obstaculos considerables. El analizador almacena temporalmente por medios electrostaticos los datos de amplitud de impulsos durante las rafagas del acelerador y en los intervalos entre rafagas, analiza el contenido del almacenamiento temporal, para pasarlos seguidamente a una memoria convencional de nucleo magnetico. Los datos presentados confirman la posibilidad de emplear esta tecnica para impulsos del orden del nanosegundo. (author) [Russian] Nizkie rabochie tsikly mnogikh impul'snykh uskoritelej delayut neobkhodimymi vysokie chastoty sledovaniya impul'sov vo vspyshkakh dlya sbora dostatochnykh dannykh v techenie razumnogo perioda vremeni. Ne tol'ko soobrazheniya ehkonomii, na kotorye vliyaet dorogostoyashchee mashinnoe vremya, zastavlyayut ispol'zovat' vysokie chastoty sledovaniya impul'sov, no i chisto tekhnicheskie soobrazheniya chasto delayut nevozmozhnymi ehksperimenty, esli chastota sledovaniya impul'sov na vspyshku nedostatochno velika dlya togo, chtoby isklyuchit' Nizkie rabochie tsikly mnogikh impul'snykh uskoritelej delayut neobkhodimymi vysokie chastoty sledovaniya impul'sov vo vspyshkakh dlya sbora dostatochnykh dannykh v techenie razumnogo perioda vremeni. Ne tol'ko soobrazheniya ehkonomii, na kotorye vliyaet dorogostoyashchee mashinnoe vremya, zastavlyayut ispol'zovat' vysokie chastoty sledovaniya impul'sov, no i chisto tekhnicheskie soobrazheniya chasto delayut nevozmozhnymi ehksperimenty, esli chastota sledovaniya impul'sov na vspyshku nedostatochno velika dlya togo, chtoby isklyuchit' ispol'zovanie obychnykh amplitudnykh analizatorov impul'sov. Po ehtim prichinam mnogo usilij udeleno razrabotke vysokoskorostnykh amplitudnykh analizatorov impul'sov dlya ispol'zovaniya s impul'snymi uskoritelyami

The study of urban systems by indicators. State of the art and implementation problems; Lo studio dei sistemi urbani attraverso indicatori. Stato dell'arte e problematiche operative

Energy Technology Data Exchange (ETDEWEB)

Del Ciello, R.; Napoleoni, S. [ENEA, Divisione Caratterizzazione dell' Ambiente e del Territorio, Centro Ricerche Casaccia, S. Maria di Galeria, RM (Italy)

2001-07-01

The purpose of this work is to define the state of the art about the problem of the indicators and their capability in reading and foreseeing the urban complexity. Therefore, the theoretical elaborations and the suggestions developed in the report try to convert the different contributions in the Italian and international literature in a frame-work, focusing on those arguments which assume a key role in the study of the urban areas: (a) the problematic definition of the administrative, physics and functional boarders of the cities; (b) the selection of the indicators that describe the urban areas; (c) the description and quality of life and of environment quality in the cities; (d) the sustainability in urban areas. [Italian] Il lavoro si propone di delineare lo stato dell'arte sul problema degli indicatori e sulla loro capacita' di leggere e prevedere la complessita' urbana. Le elaborazioni teoriche e i suggerimenti metodologici sviluppati nel rapporto tentano dunque di tradurre in protocolli di lavoro i diversi contributi prodotti negli ultimi anni nella letteratura italiana e internazionale concentrando in particolare l'attenzione su quei temi che all'interno dello studio dei sistemi urbani assumono un ruolo chiave: (a) la problematica definizione dei confini amministrativi, fisici e funzionali delle citta'; (b) la selezione degli indicatori che descrivono con piu' efficacia il sistema urbano; (c) le dimensioni e la misura della qualita' della vita e dell'ambiente nelle citta'; (d) la sostenibilita' all'interno dei sistemi urbani.

Liquid scintillators for radiocarbon dating in archaeology; Scintillateurs liquides pour l'evaluation de Page au moyen du radiocarbone en archeologie; Zhidkie stsintillyatory dlya radiouglerodnogo datirovaniya v arkheologii; Centelladores liquidos para la determinacion de edades con carbono-14 en arqueologia

Energy Technology Data Exchange (ETDEWEB)

Starik, I E; Rudenko, S I; Artem' ev, V V; Butomo, S V; Drozhzhin, V M; Romanova, E N

1962-01-15

5500 ans represente, pour des quantites de 40 et 70 ml de scintillateur, 65 et 25 ans respectivement. Les auteurs ont effectue des mesures sur des specimens archeologiques provenant de diverses regions de l'URSS. (author) [Spanish] Con el objeto de determinar mediante carbono radiactivo la edad absoluta de muestras arqueologicas, los autores utilizan un contador de centelleo sencillo con un fotomultiplicador, sin refrigeracion. Consiguen reducir la actividad de fondo empleando un blindaje formado por laminas de acero y de plomo, procediendo a una seleccion de los impulsos segun su amplitud y construyendo el detector con materiales seleccionados y ''purificados''. A partir del carbono contenido en la muestra arqueologica, se sintetiza etil benceno. Para efectuar las mediciones, se han utilizado de 18 a 72 ml de centelleador liquido, cantidad que corresponde de 3 a 12 g de carbono en la muestra. Empleando 40 ml de centelleador, la velocidad de recuento de la actividad de fondo y la del carbono contemporaneo (sin fondo) fueron respectivamente de 23,5 y 37 impulsos/min; con 70 ml, estas velocidades fueron de 28 y 57 impulsos/min. El error estadistico correspondiente a mediciones de 48 horas de duracion de muestras de 5500 anos de edad asciende a 65 y 35 anos cuando se emplean 40 ml y 70 ml de centelleador, respectivamente. Se midieron muestras arqueologicas procedentes de diversas regiones de la Union Sovietica. (author) [Russian] Dlya opredeleniya absolyutnogo vozrasta arkheologicheskikh obraztsov po radiouglerodu ispol'zuetsya prostoj stsintillyatsionnyj schetchik s odnim fotoumnozhitelem bez okhlazhdeniya. Snizhenie fona dostigaetsya primeneniem zashchity iz sloev stali i svintsa, amplitudnoj selektsii impul'sov i vyborom ''chistykh'' materialov dlya izgotovleniya detektora. Iz ugleroda, soderzhashchegosya v arkheologicheskom obraztse, sinteziruetsya ehtilbenzol. Pri izmereniyakh ispol'zovalos' ot 18 do 72 ml zhidkogo stsintillyatora, chto sootvetstvovalo vvedeniyu ot 3

Решение задач вычислительной гидродинамики с применением технологии nvidia cuda \\articlehead{технология nvidia cuda в задачах гидродинамики

OpenAIRE

Демидов, Денис; Егоров, Андрей; Нуриев, Артем

2010-01-01

На примере модельной задачи о развитии неустойчивости Кельвина-Гельмгольца рассмотрены преимущества технологии NVIDIA CUDA при решении задач гидродинамики численными методами. Рассмотрены как сеточные методы, так и бессеточный. Приводится краткое описание технологии CUDA.Advantages of NVIDIA CUDA technology are presented on the example of classical problem of evolution of Calvin-Helmholz instability. Finite-difference as well as meshless methods are considered. Short observation of CUDA techn...

Nuclear Reactor RA Safety Report, Vol. 8, Auxiliary system; Izvestaj o sigurnosti nuklearnog reaktora RA, Knjiga 8, Pomocni sistemi

Energy Technology Data Exchange (ETDEWEB)

NONE

1986-11-01

This volume describes RA reactor auxiliary systems, as follows: special ventilation system, special drainage system, hot cells, systems for internal transport. Ventilation system is considered as part of the reactor safety and protection system. Its role is eliminate possible radioactive particles dispersion in the environment. Special drainage system includes pipes and reservoirs with the safety role, meaning absorption or storage of possible radioactive waste water from the reactor building. Hot cells existing in the RA reactor building are designed for production of sealed radioactive sources, including packaging and transport. [Serbo-Croat] Ova knjiga obuhvata opis pomocnih sistem reaktora RA: sistem specijalne ventilacije, sistem specijalne kanalizacije, vruce komore, sistemi za unutrasnji transport. Ventilacioni sistem je znacajan deo sistema zastite i sigurnosti reaktora. Njegova je uloga da onemoguci disperziju radioaktivnih cestica u okolinu. Sistem specijalne kanalizacije sastoji se od agregata, cevovoda i rezervoara sa sigurnosnom armaturom i ima zadatak da prihvata i u sebe deponuje radioaktivne otpadne vode iz objekarta reaktora RA. U zgradi reaktora RA postoje vruce komore koje su namenjene za proizvodnju zatvorenih izvora zracenje, ukljucujuci i mehanicku obradu, prepakivanje i transport.

CUDAMPF: a multi-tiered parallel framework for accelerating protein sequence search in HMMER on CUDA-enabled GPU.

Science.gov (United States)

Jiang, Hanyu; Ganesan, Narayan

2016-02-27

HMMER software suite is widely used for analysis of homologous protein and nucleotide sequences with high sensitivity. The latest version of hmmsearch in HMMER 3.x, utilizes heuristic-pipeline which consists of MSV/SSV (Multiple/Single ungapped Segment Viterbi) stage, P7Viterbi stage and the Forward scoring stage to accelerate homology detection. Since the latest version is highly optimized for performance on modern multi-core CPUs with SSE capabilities, only a few acceleration attempts report speedup. However, the most compute intensive tasks within the pipeline (viz., MSV/SSV and P7Viterbi stages) still stand to benefit from the computational capabilities of massively parallel processors. A Multi-Tiered Parallel Framework (CUDAMPF) implemented on CUDA-enabled GPUs presented here, offers a finer-grained parallelism for MSV/SSV and Viterbi algorithms. We couple SIMT (Single Instruction Multiple Threads) mechanism with SIMD (Single Instructions Multiple Data) video instructions with warp-synchronism to achieve high-throughput processing and eliminate thread idling. We also propose a hardware-aware optimal allocation scheme of scarce resources like on-chip memory and caches in order to boost performance and scalability of CUDAMPF. In addition, runtime compilation via NVRTC available with CUDA 7.0 is incorporated into the presented framework that not only helps unroll innermost loop to yield upto 2 to 3-fold speedup than static compilation but also enables dynamic loading and switching of kernels depending on the query model size, in order to achieve optimal performance. CUDAMPF is designed as a hardware-aware parallel framework for accelerating computational hotspots within the hmmsearch pipeline as well as other sequence alignment applications. It achieves significant speedup by exploiting hierarchical parallelism on single GPU and takes full advantage of limited resources based on their own performance features. In addition to exceeding performance of other

Python for Development of OpenMP and CUDA Kernels for Multidimensional Data

International Nuclear Information System (INIS)

Bell, Zane W.; Davidson, Gregory G.; D'Azevedo, Ed F.; Evans, Thomas M.; Joubert, Wayne; Munro, John K. Jr.; Patlolla, Dilip Reddy; Vacaliuc, Bogdan

2011-01-01

Design of data structures for high performance computing (HPC) is one of the principal challenges facing researchers looking to utilize heterogeneous computing machinery. Heterogeneous systems derive cost, power, and speed efficiency by being composed of the appropriate hardware for the task. Yet, each type of processor requires a specific organization of the application state in order to achieve peak performance. Discovering this and refactoring the code can be a challenging and time-consuming task for the researcher, as the data structures and the computational model must be co-designed. We present a methodology that uses Python as the environment for which to explore tradeoffs in both the data structure design as well as the code executing on the computation accelerator. Our method enables multi-dimensional arrays to be used effectively in any target environment. We have chosen to focus on OpenMP and CUDA environments, thus exploring the development of optimized kernels for the two most common classes of computing hardware available today: multi-core CPU and GPU. Python s large palette of file and network access routines, its associative indexing syntax and support for common HPC environments makes it relevant for diverse hardware ranging from laptops through computing clusters to the highest performance supercomputers. Our work enables researchers to accelerate the development of their codes on the computing hardware of their choice.

A Combined MPI-CUDA Parallel Solution of Linear and Nonlinear Poisson-Boltzmann Equation

Directory of Open Access Journals (Sweden)

José Colmenares

2014-01-01

Full Text Available The Poisson-Boltzmann equation models the electrostatic potential generated by fixed charges on a polarizable solute immersed in an ionic solution. This approach is often used in computational structural biology to estimate the electrostatic energetic component of the assembly of molecular biological systems. In the last decades, the amount of data concerning proteins and other biological macromolecules has remarkably increased. To fruitfully exploit these data, a huge computational power is needed as well as software tools capable of exploiting it. It is therefore necessary to move towards high performance computing and to develop proper parallel implementations of already existing and of novel algorithms. Nowadays, workstations can provide an amazing computational power: up to 10 TFLOPS on a single machine equipped with multiple CPUs and accelerators such as Intel Xeon Phi or GPU devices. The actual obstacle to the full exploitation of modern heterogeneous resources is efficient parallel coding and porting of software on such architectures. In this paper, we propose the implementation of a full Poisson-Boltzmann solver based on a finite-difference scheme using different and combined parallel schemes and in particular a mixed MPI-CUDA implementation. Results show great speedups when using the two schemes, achieving an 18.9x speedup using three GPUs.

Efficient CUDA Polynomial Preconditioned Conjugate Gradient Solver for Finite Element Computation of Elasticity Problems

Directory of Open Access Journals (Sweden)

Jianfei Zhang

2013-01-01

Full Text Available Graphics processing unit (GPU has obtained great success in scientific computations for its tremendous computational horsepower and very high memory bandwidth. This paper discusses the efficient way to implement polynomial preconditioned conjugate gradient solver for the finite element computation of elasticity on NVIDIA GPUs using compute unified device architecture (CUDA. Sliced block ELLPACK (SBELL format is introduced to store sparse matrix arising from finite element discretization of elasticity with fewer padding zeros than traditional ELLPACK-based formats. Polynomial preconditioning methods have been investigated both in convergence and running time. From the overall performance, the least-squares (L-S polynomial method is chosen as a preconditioner in PCG solver to finite element equations derived from elasticity for its best results on different example meshes. In the PCG solver, mixed precision algorithm is used not only to reduce the overall computational, storage requirements and bandwidth but to make full use of the capacity of the GPU devices. With SBELL format and mixed precision algorithm, the GPU-based L-S preconditioned CG can get a speedup of about 7–9 to CPU-implementation.

The development of GPU-based parallel PRNG for Monte Carlo applications in CUDA Fortran

Directory of Open Access Journals (Sweden)

Hamed Kargaran

2016-04-01

Full Text Available The implementation of Monte Carlo simulation on the CUDA Fortran requires a fast random number generation with good statistical properties on GPU. In this study, a GPU-based parallel pseudo random number generator (GPPRNG have been proposed to use in high performance computing systems. According to the type of GPU memory usage, GPU scheme is divided into two work modes including GLOBAL_MODE and SHARED_MODE. To generate parallel random numbers based on the independent sequence method, the combination of middle-square method and chaotic map along with the Xorshift PRNG have been employed. Implementation of our developed PPRNG on a single GPU showed a speedup of 150x and 470x (with respect to the speed of PRNG on a single CPU core for GLOBAL_MODE and SHARED_MODE, respectively. To evaluate the accuracy of our developed GPPRNG, its performance was compared to that of some other commercially available PPRNGs such as MATLAB, FORTRAN and Miller-Park algorithm through employing the specific standard tests. The results of this comparison showed that the developed GPPRNG in this study can be used as a fast and accurate tool for computational science applications.

The development of GPU-based parallel PRNG for Monte Carlo applications in CUDA Fortran

Energy Technology Data Exchange (ETDEWEB)

Kargaran, Hamed, E-mail: h-kargaran@sbu.ac.ir; Minuchehr, Abdolhamid; Zolfaghari, Ahmad [Department of nuclear engineering, Shahid Behesti University, Tehran, 1983969411 (Iran, Islamic Republic of)

2016-04-15

The implementation of Monte Carlo simulation on the CUDA Fortran requires a fast random number generation with good statistical properties on GPU. In this study, a GPU-based parallel pseudo random number generator (GPPRNG) have been proposed to use in high performance computing systems. According to the type of GPU memory usage, GPU scheme is divided into two work modes including GLOBAL-MODE and SHARED-MODE. To generate parallel random numbers based on the independent sequence method, the combination of middle-square method and chaotic map along with the Xorshift PRNG have been employed. Implementation of our developed PPRNG on a single GPU showed a speedup of 150x and 470x (with respect to the speed of PRNG on a single CPU core) for GLOBAL-MODE and SHARED-MODE, respectively. To evaluate the accuracy of our developed GPPRNG, its performance was compared to that of some other commercially available PPRNGs such as MATLAB, FORTRAN and Miller-Park algorithm through employing the specific standard tests. The results of this comparison showed that the developed GPPRNG in this study can be used as a fast and accurate tool for computational science applications.

Valutazione dell'appropriatezza dei ricoveri in un Policlinico Universitario: analisi mediante l'uso comparativo dei sistemi di classificazione isogravitá APR-DRG e Disease Staging e del PRUO

Directory of Open Access Journals (Sweden)

M. Volpe

2003-05-01

Full Text Available

Obiettivi: valutare l’appropriatezza organizzativa dei ricoveri effettuati in un Policlinico Universitario attraverso la comparazione di due metodi, dei quali uno basato sui dati della scheda di dimissione ospedaliera ed utilizza, rispettivamente, i sistemi di classificazione iso-gravità APR-DRG e Disease Staging e l’altro sulla revisione delle cartelle cliniche mediante il PRUO.

Metodi: oggetto di analisi sono i ricoveri ordinari effettuati nell’anno 2001 ed afferenti ai DRG inclusi nella delibera della Giunta Regionale del Lazio 864/2002 che recepisce il D.P.C.M. 29/11/2001 sui livelli essenziali di assistenza.

Risultati: i risultati evidenziano che le due varianti del
metodo basato sulla SDO (metodo APPRO mostrano quote di ricoveri inappropriati sovrapponibili rispetto al complesso dei ricoveri oggetto di analisi, ma con differenze anche rilevanti tra APR-DRG e Disease Staging in relazione ai singoli DRG considerati, riconducibili ai diversi algoritmi di attribuzione del livello di severità utilizzati dai due sistemi. L’analisi campionaria effettuata con il metodo PRUO su casi afferenti ai DRG della DGR 864/2002 caratterizzati da livelli di severità minimi evidenzia una proporzione di ricoveri inappropriati superiore a quella determinata tramite i metodi basati sulla SDO. Tale differenza è verosimilmente dovuta al ruolo del valore delle soglie percentuali di accettabilità individuate dalla Regione Lazio per ciascun DRG: le quote di ricoveri che eccedono tali soglie sono considerate inappropriate.

Conclusioni: sulla base dei risultati ottenuti gli autori
descrivono gli interventi organizzativi adottati per ottimizzare il contesto di erogazione delle prestazioni
oggetto di analisi, discutono vantaggi e limiti dei metodi SDO-based e del metodo analitico PRUObased e ne propongono l�

I sistemi biometrici lo sviluppo dei mercati negli Usa, UE e nel mondo. La normativa frena quello italiano

Directory of Open Access Journals (Sweden)

Franco Zucchetti

2007-04-01

Full Text Available Negli ultimi anni il settore biometrico sta compiendo, a livello mondiale, importanti passi in avanti soprattutto in termini di sviluppo e di diffusione. Questo trend positivo riguarda il mondo anglosassone e, in particolare, la realtà statunitense dove i sistemi biometrici vengono utilizzati, nelle più svariate situazioni, sia come controllo della sicurezza fisica delle persone, sia come terminali per l’autorizzazione all’accesso. La stessa diffusione non è riscontrabile nella maggior parte dei Paesi europei e in Italia dove raffrontiamo una realtà assai atipica nella quale la biometria fa un gran parlare di sé ma, in concreto, viene utilizzata con molta difficoltà. Tuttavia, un punto di contatto tra tutti gli attori europei ed extraeuropei può essere individuato nello sviluppo del settore relativo al riconoscimento biometrico applicato ai passaporti ed alle carte di identità. Il processo di globalizzazione ha generato, infatti, grandi masse di individui in continuo e costante movimento da un Paese all’altro e, contestualmente, ha prodotto una crescente domanda di sicurezza soprattutto nei confronti della minaccia terroristica. Appare chiaro, quindi, come l’identificazione certa delle persone diventi una necessità e debba presentare tecnologie simili per essere utilizzate ovunque.

Demountable 4 {pi} Geiger Counters for Standardization and the Assay of Low-Activity Samples; Compteurs 4 {pi} GM demontables pour l'etalonnage et l'essai d'echantillons de faible activite; S'emnye schetchiki Gejgera na 4 {pi} dlya standartizatsii i otsenki prob nizkoj aktivnosti; Condatores GM 4 {pi} para la normalizacion de patrones radiactivos con baja actividad

Energy Technology Data Exchange (ETDEWEB)

Trott, N G; Bentley, R E; Burton, L K [Physics Department, Institute of Cancer Research, Royal Cancer Hospital, London, S. W. 3 (United Kingdom)

1960-06-15

propre, du premier. Construit en acier inoxidable, il a ete initialement concu pour l'essai de faibles activites dans les materiaux biologiques. Il peut cependant etre adapte a la mesure absolue de sources de faible niveau d'activite ( {<=} 100 cpm) car, avec une gaine de compteurs cosmiques en anticoincidence son mouvement propre s'abaisse jusqu'a 1-2 cpm. (author) [Spanish] Los autores dan cuenta de algunos perfeccionamiento s introducidos en la construccion de contadores Geiger-Mueller 4 {pi} y estudian las aplicaciones de estos aparatos en la medicion de patrones radiactivos utilizados en trabajos de radiologia. En los dos modelos de contadores Geiger-Mueller 4 {pi} que los autores describen los alambres anodicos pueden desmontarse facilmente, lo cual facilita su limpieza. Uno de los modelos de contadores se viene utilizando con exito desde hace varios anos para normalizar radionuclidos {beta}; se exponen algunos resultados de las comparaciones efectuadas con los patrones de otros laboratorios. Estos contadores tambien se han empleado, en combinacion con un dispositivo de ionizacion {gamma}, para determinar la emision {gamma} especifica (factor k) del Fe{sup 59}, Cs{sup 137} y Ir{sup 192}. El segundo modelo, de acero inoxidable, es una copia del primero, en menor escala; esta disenado para trabajar con bajas actividades ambiente y se destina principalmente a la determinacion cuantitativa de pequenas cantidades de substancias radiactivas contenidas en materiales biologicos. Tambien puede adaptarse para la medicion absoluta de fuentes radiactivas de bajo indice de recuento ({<=} 100 impulsos por minuto), pues si se le rodea de contadores de rayos cosmicos, montados en anticoincidencia , es posible estabilizar la actividad de fondo en 1 a 2 impulsos por minuto. (author) [Russian] Izlagayutsya nekotorye rezul'taty raboty po konstruirovani yu schetchikov Gejgera-Myuller a na 4 {pi}, a takzhe voprosa ikh ispol'zovaniya dlya izmereniya standartov radioaktivnost i v rabote s

Differentiated mono and multimaterial waste collection methods; Sistemi di raccolta differenziata di rifiuti solidi urbani: metodologie tecnico-economiche applicate ad un ambito territoriale calabrese

Energy Technology Data Exchange (ETDEWEB)

Reitano, A [Calabria Univ., Arcavata di Rende, CS (Italy). Dipt. di Organizzazione Aziendale e Amministrazione Pubblica; Giacchino, P P

1999-12-01

The technical, economical and financial estimate of differentiated mono and multimaterial waste collection methods is the subject of this research. This is referred to a Calabrian (Italy) territorial ambit and it is divided in two stages: the first one is based on the evaluation of the possible technical achievement of the two alternatives; the second one lies in the formulation of foreseeing economic and capital accounts to which operative and financial methods are applied for the evaluation of investments. [Italian] La ricerca ha come oggetto la valutazione tecnica ed economico-finanziaria dei sistemi per la raccolta differenziata mono e multi-materiale dei rifiuti solidi urbani. Specificatamente riferita ad un ambito territoriale calabrese, si articola in due fasi: la prima e' focalizzata sulla realizzabilita' tecnica delle due alternative; la seconda consiste nella formulazione dei conti previsionali economico e di capitale, cui vengono, quindi, applicati i metodi operativi e finanziari per la valutazione degli investimenti.

General-purpose parallel algorithm based on CUDA for source pencils' deployment of large γ irradiator

International Nuclear Information System (INIS)

Yang Lei; Gong Xueyu; Wang Ling

2013-01-01

Combined with standard mathematical model for evaluating quality of deploying results, a new high-performance parallel algorithm for source pencils' deployment was obtained by using parallel plant growth simulation algorithm which was completely parallelized with CUDA execute model, and the corresponding code can run on GPU. Based on such work, several instances in various scales were used to test the new version of algorithm. The results show that, based on the advantage of old versions. the performance of new one is improved more than 500 times comparing with the CPU version, and also 30 times with the CPU plus GPU hybrid version. The computation time of new version is less than ten minutes for the irradiator of which the activity is less than 111 PBq. For a single GTX275 GPU, the maximum computing power of new version is no more than 167 PBq as well as the computation time is no more than 25 minutes, and for multiple GPUs, the power can be improved more. Overall, the new version of algorithm running on GPU can satisfy the requirement of source pencils' deployment of any domestic irradiator, and it is of high competitiveness. (authors)

Performance analysis of a parallel Monte Carlo code for simulating solar radiative transfer in cloudy atmospheres using CUDA-enabled NVIDIA GPU

Science.gov (United States)

Russkova, Tatiana V.

2017-11-01

One tool to improve the performance of Monte Carlo methods for numerical simulation of light transport in the Earth's atmosphere is the parallel technology. A new algorithm oriented to parallel execution on the CUDA-enabled NVIDIA graphics processor is discussed. The efficiency of parallelization is analyzed on the basis of calculating the upward and downward fluxes of solar radiation in both a vertically homogeneous and inhomogeneous models of the atmosphere. The results of testing the new code under various atmospheric conditions including continuous singlelayered and multilayered clouds, and selective molecular absorption are presented. The results of testing the code using video cards with different compute capability are analyzed. It is shown that the changeover of computing from conventional PCs to the architecture of graphics processors gives more than a hundredfold increase in performance and fully reveals the capabilities of the technology used.

Information systems planning in public administration; Definizione di una metodologia per la pianificazione dei sistemi informativi in un ente pubblico di ricerca con elevato livello di decentramento

Energy Technology Data Exchange (ETDEWEB)

Minelle, F [Rome, Univ. ` La Sapienza` (Italy). Fac. di Scienze Matematiche, Fisiche e Naturali; Di Marco, R A [ENEA, Rome (Italy). Funzione Centrale Informatica; Bottini, M

1997-02-01

servizi prestati e degli investimenti effettuati, fossero inadeguati. E che, quindi, in questo ambito si operasse prestando scarsa attenzione a una valutazione costi/benefici degli investimenti sostenuti, che pure si andavano facendo di dimensioni rilevanti. Un ruolo importante e crescente viene oggi affidato alla pianificazione dei sistemi informativi che annualmente la P.A. deve effettuare. Quando si parla di piano per i sistemi informativi ci si riferisce a un piano di medio-lungo termine, in riferimento e in coerenza al quale possano essere orientate, effettuate e controllate, nel corso del tempo, le scelte delle singole Amministrazioni o Enti Pubblici. Nel lavoro che segue si e` partiti dall`analisi della situazione italiana, che prevede l`utilizzo di una specifica metodologia prodotta dall`AIPA per la pianificazione dei sistemi informativi nella Pubblica Amministrazione. la parte innovativa e sperimentale della tesi e` volta all`adeguamento di tale metodologia ad una realta` quale e` l`ENEA, diversa ad esempio da quella di un Ministero (per la quale la proposta AIPA e` ottimale), sia perche` cambiano i fini istituzionali e le conseguenti modalita` di gestione, sia perche` l`Ente e` caratterizzato da un forte decentramento e sia soprattutto perche e` mancata un`indagine conoscitiva dei vari processi di servizio, preliminare all`applicazione della proposta AIPA.

100-Mc counting system; Ensemble de comptage a 100 megacycles; Schetnaya sistema na 100 megatsiklov; Sistema contador de 100 megaciclos

Energy Technology Data Exchange (ETDEWEB)

Sugarman, R; Higinbotham, W A; Yonda, A H [Brookhaven National Laboratory, Upton, Long Island, NY (United States)

1962-04-15

accionado por este. A fin de lograr un funcionamiento seguro y rapido, asi como una buena estabilidad respecto del tiempo y de la temperatura, se hicieron funcionar a los transistores con una ganancia de carga unidad, ya sea en conmutacion de corriente o en forma lineal como amplificador distribuido. Cada diodo ''tunel'' proporcionaba una ganancia adicional de conmutacion de carga comprendida entre 2 y 5 con la misma estabilidad y paso de banda que los transistores. Cada modulo esta construido para funcionar con una velocidad de contaje de 100 mega-impulsos por segundo. Los elevados ciclos de trabajo del sistema fueron posibles gracias a interconexiones de corriente continua formando los impulsos mediante doble linea de retardo para obtener una rapida recuperacion. Para velocidades de contaje de hasta 50 MHz no se preve ninguna perdida en el rendimiento del sistema. El discriminador basico tiene una sensibilidad graduable comprendida entre 2 y 10 mA con una salida acoplada en continua de 10 mA a potential de tierra. Los tiempos de elevacion y caida de la salida son de un ns; la anchura del impulso se regula mediante cables de retardo; el ciclo de trabajo maximo de salida es de 50% para una recuperacion de entrada del 95%. La inestabilidad en tiempo desde el umbral de activacion hasta tres veces dicho umbral es de 2 ns como maximo. Una version mas perfeccionada tiene una sensibilidad diez veces mayor. Esta dotada de un amplificador distribuido y de una cadena de conmutacion de 2 diodos tunel. Las caracteristicas de salida son identicas. Se examinaran igualmente otros sistemas logicos para discriminadores. La escala de 8 tiene circuitos binarios de diodos tunel. La primera de estas se dispara a traves de diodos ordinarios, lo que constituye una innovacion. (author) [Russian] Daetsya opisanie polnoj schetnoj sistemy na 100 megatsiklov dlya ispol'zovaniya v ehksperimentakh na uskoritelyakh. Dlya vsej vysokoskorostnoj logicheskoj sistemy ispol'zuetsya logicheskaya operatsiya

A heterogeneous computing accelerated SCE-UA global optimization method using OpenMP, OpenCL, CUDA, and OpenACC.

Science.gov (United States)

Kan, Guangyuan; He, Xiaoyan; Ding, Liuqian; Li, Jiren; Liang, Ke; Hong, Yang

2017-10-01

The shuffled complex evolution optimization developed at the University of Arizona (SCE-UA) has been successfully applied in various kinds of scientific and engineering optimization applications, such as hydrological model parameter calibration, for many years. The algorithm possesses good global optimality, convergence stability and robustness. However, benchmark and real-world applications reveal the poor computational efficiency of the SCE-UA. This research aims at the parallelization and acceleration of the SCE-UA method based on powerful heterogeneous computing technology. The parallel SCE-UA is implemented on Intel Xeon multi-core CPU (by using OpenMP and OpenCL) and NVIDIA Tesla many-core GPU (by using OpenCL, CUDA, and OpenACC). The serial and parallel SCE-UA were tested based on the Griewank benchmark function. Comparison results indicate the parallel SCE-UA significantly improves computational efficiency compared to the original serial version. The OpenCL implementation obtains the best overall acceleration results however, with the most complex source code. The parallel SCE-UA has bright prospects to be applied in real-world applications.

The Main Technological Characteristics of Apparatus for Industrial Radiochemical Processes, in Particular Ethylene Polymerization; Caracteristique techniques fondamentals des appareils pour l'application industrielle de reactions chimiques sous rayonnement (notamment la polymerisation de l'ethylene ); Osnovnye tekhnologicheskie kharakteristiki apparatov dlya provedeniya radiatsionno-khimi-cheskikh protsessov (v chastnosti, dlya polimerizatsii ehtilena) v promyshlennom masshtabe; Principales caracteristicas tecnologicas de los aparatos para la aplicacion industrial de reacciones radioquimicas

Energy Technology Data Exchange (ETDEWEB)

Syrkus, N P; Breger, A K; Weinstein, B I [Karpov Physicochemical Institute, Moscow, USSR (Russian Federation)

1960-07-15

, Q {approx} W{sub 0}{sup 0'5}. (author) [Spanish] Se propone un metodo de evaluacion de la efectividad de los aparatos, cualquiera que sea su construccion, comparandola con la productividad de un aparato infinitamente grande que tenga la misma fuente de radiaciones. Se indican las caracteristicas tecnologicas de un aparato destinado a la polimerizacion del etileno mediante radiaciones (a presion de 200 atmosferas y temperatura de 25{sup o} C{sup 4} empleando como fuente principal radiaciones gamma de cobalto-60 a distintas actividades. Se pueden calcular los datos tecnicos de tal aparato segun el valor medio de la intensidad de las dosis, fijado segun la magnitud del coeficiente de rendimiento energetico del aparato. Se indica en el trabajo que, siendo las demas condiciones iguales, la productividad (Q) del aparato es funcion exponencial de la intensidad (W{sub 0}) de las radiaciones gamma del mismo. Para el aparato que se estudia en el trabajo la formula es: Q{approx}W{sub 0}{sup 0'5}. (author) [Russian] V doklade rassmotreny v obshchem vide otdel'nye naibolee vazhnye tekhnologicheskie kharakteristiki apparatov (na primere sfericheskogo apparata) dlya provedeniya radiatsionno-khimicheskikh protsessov v promyshlennom masshtabe. Predlozhen metod otsenki ehffektivnosti apparata lyuboj konstruktsii putem sravneniya s proizvoditel'nost' yu beskonechno bol'shogo apparata, imeyushchego tot zhe istochnik izlucheniya. Priveden raschet tekhnologicheskoj kharakteristiki apparata dlya radiatsionnoj polimerizatsii ehtilena (davlenie 200 atm, temperatura 25{sup o} C{sup 3} so sterzhnevym istochnikom gamma-izlucheni ya Co{sup 60} razlichnoj aktivnosti. Takoj apparat mozhno rasschityvat' po srednim znacheniyam moshchnostej doz, opredelyaemym po velichine ehnergeticheskogo KPD apparata. Pokazano, chto proizvoditel'nost'apparata (Q), pri prochikh ravnykh usloviyakh, yavlyaetsya stepennoj funktsiej moshchnosti (W{sub 0}) gamma-izlucheniya apparata. Dlya rassmotrennogo apparata : Q

Efficient particle-in-cell simulation of auroral plasma phenomena using a CUDA enabled graphics processing unit

Science.gov (United States)

Sewell, Stephen

This thesis introduces a software framework that effectively utilizes low-cost commercially available Graphic Processing Units (GPUs) to simulate complex scientific plasma phenomena that are modeled using the Particle-In-Cell (PIC) paradigm. The software framework that was developed conforms to the Compute Unified Device Architecture (CUDA), a standard for general purpose graphic processing that was introduced by NVIDIA Corporation. This framework has been verified for correctness and applied to advance the state of understanding of the electromagnetic aspects of the development of the Aurora Borealis and Aurora Australis. For each phase of the PIC methodology, this research has identified one or more methods to exploit the problem's natural parallelism and effectively map it for execution on the graphic processing unit and its host processor. The sources of overhead that can reduce the effectiveness of parallelization for each of these methods have also been identified. One of the novel aspects of this research was the utilization of particle sorting during the grid interpolation phase. The final representation resulted in simulations that executed about 38 times faster than simulations that were run on a single-core general-purpose processing system. The scalability of this framework to larger problem sizes and future generation systems has also been investigated.

Nuclear Reactor RA Safety Report, Vol. 5, Reactor cooling systems; Izvestaj o sigurnosti nuklearnog reaktora RA, Knjiga 5, Hladjenje reaktora i pripadajuci sistemi

Energy Technology Data Exchange (ETDEWEB)

NONE

1986-11-01

RA reactor cooling system enable cooling during normal operation and under possible accidental conditions and include: technical water system, heavy water system, helium gas system, system for heavy water purification and emergency cooling system. Primary cooling system is a closed heavy water circulation system. Heavy water system is designed to enable permanent circulation and twofold function of heavy water. In the upward direction of cooling it has a coolant role and in the downward direction it is the moderator. Separate part of the primary coolant loop is the system for heavy water purification. This system uses distillation and ion exchange processes. [Serbo-Croat] Sistemi za hladjenje reaktora RA obezbedjuju hladjenje u svim rezimima eksploatacije i potenijalno udesnim satnjim i obuhvataju: sistem tehnicke vode, sistem teske vode, gasni sistem helijuma, sistem za preciscavanje teske vode i sistem za akcidentalno hladjenje. Primarni sistem za hladjenje je zatvoreni cirkulacioni sistem teske vode. Specificnost sistema teske vode vezana je za neprekidnost cirkulacije i razlicite funkcije teske vode. U uzlaznom strujanju, teske vode ima ulogu hladioca a u silaznom ulogu moderatora. Poseban deo primarnog sistema predstavlja sistem za preciscavanje teske vode. Ovaj sistem koristi destilacioni i jonoizmenjivacki postupak.

A comparative study of history-based versus vectorized Monte Carlo methods in the GPU/CUDA environment for a simple neutron eigenvalue problem

International Nuclear Information System (INIS)

Liu, T.; Du, X.; Ji, W.; Xu, G.; Brown, F.B.

2013-01-01

For nuclear reactor analysis such as the neutron eigenvalue calculations, the time consuming Monte Carlo (MC) simulations can be accelerated by using graphics processing units (GPUs). However, traditional MC methods are often history-based, and their performance on GPUs is affected significantly by the thread divergence problem. In this paper we describe the development of a newly designed event-based vectorized MC algorithm for solving the neutron eigenvalue problem. The code was implemented using NVIDIA's Compute Unified Device Architecture (CUDA), and tested on a NVIDIA Tesla M2090 GPU card. We found that although the vectorized MC algorithm greatly reduces the occurrence of thread divergence thus enhancing the warp execution efficiency, the overall simulation speed is roughly ten times slower than the history-based MC code on GPUs. Profiling results suggest that the slow speed is probably due to the memory access latency caused by the large amount of global memory transactions. Possible solutions to improve the code efficiency are discussed. (authors)

A comparative study of history-based versus vectorized Monte Carlo methods in the GPU/CUDA environment for a simple neutron eigenvalue problem

Science.gov (United States)

Liu, Tianyu; Du, Xining; Ji, Wei; Xu, X. George; Brown, Forrest B.

2014-06-01

For nuclear reactor analysis such as the neutron eigenvalue calculations, the time consuming Monte Carlo (MC) simulations can be accelerated by using graphics processing units (GPUs). However, traditional MC methods are often history-based, and their performance on GPUs is affected significantly by the thread divergence problem. In this paper we describe the development of a newly designed event-based vectorized MC algorithm for solving the neutron eigenvalue problem. The code was implemented using NVIDIA's Compute Unified Device Architecture (CUDA), and tested on a NVIDIA Tesla M2090 GPU card. We found that although the vectorized MC algorithm greatly reduces the occurrence of thread divergence thus enhancing the warp execution efficiency, the overall simulation speed is roughly ten times slower than the history-based MC code on GPUs. Profiling results suggest that the slow speed is probably due to the memory access latency caused by the large amount of global memory transactions. Possible solutions to improve the code efficiency are discussed.

Lezioni di meccanica razionale con elementi di statica grafica

CERN Document Server

Sbrana, Francesco

1950-01-01

Elementi di calcolo vettoriale ; riduzione di un sistema qualunque di vettori applicati ; trattazione analitica dei sistemi di vettori applicati ; uso dei poligni funicolari per la composizione di più vettori applicati complanari ; vettori variabili ; cinematica del punto ; studio del moto di un punto in un piano in coordinate polari ; cinematica de sistemi rigidi ; moto di un sistema rigido con un punto fisso (moto rigido sferico) ; moto relativo ; sistemi di punti in general, vincoli ; concetti e postulati fondamentali della meccanica ; unità mecchaniche, omogeneità, modelli ; equilibrio di un punto e di un sistema di punti materiali ; statica dei solidi indeformabili (sistemi rigidi) ; sistemi deformabili, travature reticolari ; equilibrio dei poligoni funicolari e delle curve funicolari ; nozioni sull'attrito ; integrazione grafica ; baricentri ; momenti d'inerzia ; calcolo grafico dei momenti statici e dei momenti d'inerzia dei sistemi piani ; dinamica del punto libero ; dinamica del punto vincolato ;...

Esercizi e complementi di meccanica razionale

CERN Document Server

Bisconcini, Giulio

1947-01-01

Vettori ; cinematica del punto ; cinematica dei sistemi rigidi ; loti relativi ; unità, dimensioni, modelii ; l'attrito e la statica del punto ; baricentri ; momenti d'inerzia ; attrazione newtoniana ; statica dei solidi ; statica dei sistemi articolati e dei fili ; equazione simbolica della statica ; equilibrio relativo ; dinamica del punto in una dimensione ; dinamica dei sistemi.

Use of Radioactive Tracers in the Study of Insect-Plant Relationships; Emploi des radioindicateurs dans l'etude des relations insecte-plante; Ispol'zovanie radioaktivnykh indikatorov dlya izucheniya vzaimnoj svyazi mezhdu nasekomymi ch rasteniyami; Empleo de marcadores radiactivos para estudiar las relaciones insecto-planta

Energy Technology Data Exchange (ETDEWEB)

Crossley, Jr., D. A. [Radiation Ecology Section, Health Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN (United States)

1963-09-15

habian pasaco la hibernacion de los adultos nuevos, porque la eliminacion del cesio en los primeros era mas rapida. En los estudios sobre poblaciones formadas por varias especies, la relacion entre el tamano del insecto y el indice de eliminacion sirvio para calcular el periodo medio biologico para la eliminacion del radiocesio por insectos harbivoros en una zona tratada con {sup 137}Ce. Este periodo medio y los datos sobre las masas biologicas vegetales e insectiles y sobre las concentraciones de radiocesio han permitido calcular el consumo de vegetales de una poblacion entera de insectos. Del mismo modo, se ha podido calcular el consumo de insectos de los artropodos depredadores basandose en las concentraciones estacionarias de radiocesio en los depredadores y en las victimas, las masas biologicas y el indice medio de eliminacion. (author) [Russian] Pri bolee rannem ispol'zovanii radioaktivnykh indikatorov v ehkologicheskikh issledovaniyakh nasekomykh-vreditelej ikh rasseyaniya i migratsii izuchalis' pri pomoshchi radioizotopov, kotorymi markirovalis' otdel'nye nasekomye. V poslednee vremya poluchilo rasprostranenie ispol'zovanie radioizotopov dlya izucheniya biologicheskoj assotsiatsii nasekomykh i rastenij, a takkhe khishchnykh nasekomykh i ikh dobychi, iskhodya iz opredeleniya potrebleniya imi pishchi. Biologicheskoe vydelenie radioizotopov, kotoroe meshaet izucheniyu rasseyaniya nasekomykh, ispol'zuetsya v nastoyashchee vremya dlya izmereniya kolichestva potrebleniya pishchi. Kak v polevykh issledovaniyakh, tak i v laboratornykh ehksperimentakh nasekomym daetsya vozmozhnost' dostich' v protsesse pitaniya sostoyaniya ustojchivoj kontsentratsii radioizotopov. V ehtikh usloviyakh temp pogloshcheniya dannogo radioizotopa raven tempu ego vydeleniya: (temp pogloshcheniya) = (velichine ustojchivogo sostoyaniya) x (skorost' poteri); Izmereniya tempov vydeleniya (biologicheskogo poluraspada) pozvolyayut perevodit' sostoyaniya ustojchivoj kontsentratsii v funktsii tempov

Kobi niteliğindeki sağlık kuruluşlarında iç kontrol sistemi ve önemi

Directory of Open Access Journals (Sweden)

Güler GÜNEY

2014-06-01

Full Text Available Büyük küçük tüm sağlık kuruluşlarının, sürekliliklerini sağlayabilmeleri ve hedeflerine ulaşabilmeleri bakımından en önemli kriter etkili bir iç kontrol sistemine sahip olmalarıdır. Özellikle Türkiye gibi ekonomisi gelişmekte olan, ticari aktörlerinin çok büyük bir kısmı KOBİ statüsünde olan ülkelerde, ekonomik hayatı hareketlendirmek, sermaye piyasalarının gelişmesi ve işlerliğinin kuvvetlenmesinin sağlanmasında da yine en temel kriter etkin ve etkili bir iç kontrol siteminin varlığıdır. Çünkü etkili bir iç kontrol sistemi; hata, hile ve yolsuzlukların önlenmesinde ve işletme içinde uygulanan politika ve prosedürlerin uygulanma düzeyi ve verimliliğinin sağlanmasında da önemli bir etkendir. İster büyük, ister küçük olsun her işletmede etkin olan ya da olmayan bir iç kontrol mevcuttur. Ancak bu kontrollerin işletmede belirlenmiş bulunan belli politika ve prosedürlere göre yapılıp yapılmadığı ya da etkin olup olmadıkları tartışılabilmektedir. Ülkemizdeki sağlık kuruluşlarından, özellikle sermaye piyasalarında işlem gören kuruluşlarda mevzuatlar gereği iç kontrol sistemi kurulmuş olmasma rağmen, bu iç kontrol sisteminin tamamıyla örgütsel amaçlar doğrultusunda etkili ve verimli şekilde çalıştığını söylemek mümkün değildir. Ülkemizdeki KOBİ niteliğindeki sağlık kuruluşlarının hatırı bir kısmında ise iç kontrol sisteminin oldukça yetersiz ve zayıf olarak nitelenebilecek şekilde uygulandığı ifade edilebilir. Bu da diğer tüm KOBÎ'lerde olduğu gibi sağlık alanındaki kuruluşların büyüme, gelişme ve kurumsallaşması üzerine olumsuz etkide bulunmaktadır. Daha da önemlisi de kurumların örgütsel amaçlarını gerçekleştirmesinde zorluklarla karşılaşmasına sebep olmaktadır. Başka bir deyişle, etkin iç kontrol sisteminin işletmelerin ilgililerine fayda sağlaması gereklidir. Böylece i

Recommendation for environmental management and safety systems in high risk industrial accidents; Linee guida per l'integrazione dei sistemi di gestione ambiente e sicurezza nelle aziende a rischio di incidente rilevante

Energy Technology Data Exchange (ETDEWEB)

Luciani, R; Andriola, L; Caropresso, G; Paci, S; Vignati, S; Vignoni, P C [ENEA Centro Ricerche Casaccia, Rome (Italy). Dipt. Ambiente

2000-07-01

This document presents the IMPREMAS Project from Italian ENEA (National Agency for New Technology, Energy and the Environment) for the eco-management of small and medium enterprises at risk for se and manipulation of hazardous substances. [Italian] Il presente documento e' stato elaborato nell'ambito del progetto IMPREMAS condotto dall'ENEA, in collaborazione con il Ministero dell'Ambiente, Regione Lombardia, Federchimica e Finlombarda, per la realizzazione di un progetto pilota per l'eco-gestione delle piccole e medie imprese classificate a rischio per l'uso e lo stoccaggio di sostanze pericolose previste dal DPR. n. 175 del 17-5-1988. L'azione ha riguardato l'applicazione del regolamento EMAS 1836/93 congiuntamente alla implementazione di un sistema di sicurezza per piccole e medie imprese a rischio di incidente rilevante del settore chimico-farmaceutico con l'obiettivo di mettere a punto le linee guida di riferimento per l'integrazione dei sistemi ambiente e sicurezza.

Radioactive preparation of defects in solids; Creation de defauts dans les solides au moyen de radioisotopes; Ispol'zovanie radioaktivnosti dlya obrazovaniya defektov v tverdykh telakh; Creacion de deiectos en los solidos mediante radioisotopos

Energy Technology Data Exchange (ETDEWEB)

Lambe, J [Physics Department, Ford Motor Company, Scientific Laboratory, Dearborn, MI (United States)

1962-01-15

moleculaire solide. Les experiences effectuees montrent que l'emploi de ce procede est tout a fait possible et devrait convenir plus particulierement a la production de radicaux libres dans les matieres organiques dont la radioresistance est assez forte. (author) [Spanish] El estudio de los defectos que aparecen en los cristales casi perfectos constituye uno de los capitulos mas interesantes de la fisica del estado solido. Por lo tanto, la creacion controlada de los defectos deseados representa un aspecto primordial de esos estudios. Dos de los metodos que mas se emplean para introducir defectos de esta clase consisten en agregar deliberadamente impurezas quimicas y en radioinducir danos. El autor ha estudiado la posililidad de valerse de la desintegracion radiactiva para crear defectos en los solidos, La tecnica se basa simplemente en obtener un material lo mas perfecto posible, pero en el que algunos de los atomos del cristal consistan en isotopos radiactivos del mismo elemento. Al desintegrarse estos atomos, el elemento descendiente origina un defecto. A fin de comprobar la posibilidad de aplicar esta tecnica, el autor preparo atomos de tritio incorporados en cristales de tritio molecular solido. Los experimentos indican que el metodo es viable, y que deberia poder aplicarse ante todo a la separacion de aquellos radicales libres contenidos en sustancias organicas que sean bastante resistentes a los danos ocasionados por las radiaciones. (author) [Russian] Odnoj iz naibolee interesnykh oblastej fiziki tverdogo sostoyaniya yavlyaetsya izuchenie defektov v pochti sovershennykh kristallakh. Takim obrazom, umyshlennoe obrazovanie takikh defektov yavlyaetsya vazhnym aspektom ehtikh issledovanij. Dlya proizvodstva takikh defektov byli shiroko rasprostraneny metody khimicheskikh dobavlenij i povrezhdeniya radiatsiej. V nastoyashchem trude rassmatrivayutsya nekotorye vozmozhnosti ispol'zovaniya radioaktivnogo raspada dlya obrazovaniya defektov v tverdykh telakh. Metod ehtot

Recommendation for environmental management and safety systems in high risk industrial accidents; Linee guida per l'integrazione dei sistemi di gestione ambiente e sicurezza nelle aziende a rischio di incidente rilevante

Energy Technology Data Exchange (ETDEWEB)

Luciani, R.; Andriola, L.; Caropresso, G.; Paci, S.; Vignati, S.; Vignoni, P.C. [ENEA Centro Ricerche Casaccia, Rome (Italy). Dipt. Ambiente

2000-07-01

This document presents the IMPREMAS Project from Italian ENEA (National Agency for New Technology, Energy and the Environment) for the eco-management of small and medium enterprises at risk for se and manipulation of hazardous substances. [Italian] Il presente documento e' stato elaborato nell'ambito del progetto IMPREMAS condotto dall'ENEA, in collaborazione con il Ministero dell'Ambiente, Regione Lombardia, Federchimica e Finlombarda, per la realizzazione di un progetto pilota per l'eco-gestione delle piccole e medie imprese classificate a rischio per l'uso e lo stoccaggio di sostanze pericolose previste dal DPR. n. 175 del 17-5-1988. L'azione ha riguardato l'applicazione del regolamento EMAS 1836/93 congiuntamente alla implementazione di un sistema di sicurezza per piccole e medie imprese a rischio di incidente rilevante del settore chimico-farmaceutico con l'obiettivo di mettere a punto le linee guida di riferimento per l'integrazione dei sistemi ambiente e sicurezza.

Calore e termodinamica

CERN Document Server

Zemansky, Mark W

1970-01-01

Temperatura ; sistemi termodinamici semplici ; lavoro ; il calore e il primo principio ; gas ideali ; teoria cinetica dei gas ideali ; il secondo principio della termodinamica ; reversibilità e temperatura Kelvin ; entropia ; meccanica statistica sostanze pure ; transizioni di fase, elio liquido ed elio solido ; sistemi particolari ; paramagnetismo, fisica delle basse temperature, temperature negative e terzo principio ; superfluidità e superconduttività ; equilibrio chimico ; reazioni con gas ideali ; sistemi eterogenei.

Türkçe Öğrenimi İçin Web Tabanlı Zeki Öğretim Sistemi (Türkzös Ve Değerlendirmesi Web Based Intelligent Tutoring System For Turkish Learning (Türkzös And Evaluation

Directory of Open Access Journals (Sweden)

Nursal ARICI

2013-09-01

thestudents. Computer Adaptive Tests and student tracking compenentsare the original models which have been developed with using theArtificial Intelligence techniquies. These compenents determine thelevel of knowledge and competencies, suggest suitable contents and gives assistance and guidence. Contents Management System provides assistance in preparation and managing the course syllabus. This component has got a flexible and convenient structure. By this way it can be possible to prepare and manage the course syllabus in Turkish teaching both as native and second language. In order to test the system some course contents have been prepared. This contents have been selected units and subjects suitable to the primary school 5- 6. Turkish classes. This contents have been used in introducing the system and getting their feedbacks of the Turkish teachers and canditaes teachers. The system can be reached on internet address http://turkzos.com. E-öğrenme, bilişim teknolojilerindeki gelişmelerin ürünü olan bir öğrenme modelidir. Bu model, öğrenme içeriklerinin görsel-işitsel öğelerle zenginleştirilebilmesi ve bu içeriklerin istenildiği zaman, istenildiği yerden düşük maliyetle, hızlıca kişilere ulaştırılabilmesi gibi avantajlar sağlar. Başta İngilizce olmak üzere birçok dilin eğitiminde e-öğrenme modelinden yararlanılmaktadır. Bu modelin dil öğrenme ve öğretme alanındaki öneminin bilinciyle Türkçe dil eğitimi için bir e-öğrenme sistemi geliştirilmiştir. Geliştirdiğimiz bu sistem TÜRKZÖS olarak adlandırılmıştır. Bu makalede, geliştirdiğimiz e-öğrenme sistemi tanıtılmakta, dil öğrenimine katkıları Türkçe dersi veren öğretmen ve öğretmen adaylarının görüşleri doğrultusunda açıklanmaktadır. TÜRKZÖS’ü geliştirme amacımız; bilişim teknolojilerinin imkânlarını sunarak Türkçe öğrenen ve öğretenlere destek sağlamaktır.Sistem, genel ağ (Internet üzerinden hizmet verecek biçimde geli

Application of radiochemistry to the preparation of high-purity silicon; Application de la radiochimie a la preparation de silicium de purete elevee; Primenenie radiokhimii dlya prigotovleniya kremniya vysokoj chistoty; Aplicacion de la radioquimica a la preparacion de silicio de elevada pureza

Energy Technology Data Exchange (ETDEWEB)

Ichimiya, Toeao; Baba, Hideo; Nozaki, Tadashi [Electrical Communication Laboratory, Musashino-Shi, Tokyo (Japan)

1962-01-15

concentracion de yodo en la corriente de gas empleado para la yoduracion, hallandose que este procedimiento podia aplicarse al control automatico de la reaccion de yoduracion a condicion de perfeccionar la tecnica utilizada. (author) [Russian] Radiokhimicheskie issledovaniya protsessa polucheniya kremniya vysokoj chistoty dlya ego ispol'zovaniya v kachestve poluprovodnika obespechili priobretenie razlichnogo roda poleznoj informatsii i metodov dlya razvitiya dannogo protsessa. Povedenie fosfora v kachestve primesi na ochistitel'noj stadii rekristallizatsii i na urovne zonal'noj ochistki izuchalos' putem ispol'zovaniya radioaktivnogo fosfora v kachestve mechenykh atomov i bylo vyyasneno, chto na kazhdoj stadii produkty gidroliza, nakhodyashchiesya v vzvesi s chetyrekhjodistym kremniem, igrayut vazhnuyu rol' v udalenii ne tol'ko fosfora, no i drugikh primesej. Byl ispol'zovan aktivatsionnyj analiz dlya opredeleniya kontsentratsii mysh'yaka na protyazhenii vsego protsessa i bylo ukazano, chto posle fraktsionnoj peregonki ona mozhet byt' snizhena do 10-13 chastej na million. Ukazyvalos' takzhe na osnovanii nejtronnogo aktivatsionnogo analiza, chto ehlementarnyj kremnij posle termicheskogo razlozheniya joda obychno soderzhit neskol'ko chastej joda na million, no ego kontsentratsiya mozhet byt' s pomoshch'yu prostogo sinteza snizhena na odin poryadok velichiny. Pogloshchenie myagkikh luchej bylo primeneno dlya opredeleniya kontsentratsii joda v jodistom potoke gaza i bylo najdeno, chto takoj printsip mozhet byt' primenen k avtomaticheskomu kontrolyu nad jodistoj reaktsiej s posleduyushchim razvitiem sootvetstvuyushchikh metodov. (author)

Expo e sistemi innovativi per la mobilità Mega Events and innovative mobility system: the Expo transport lessons

Directory of Open Access Journals (Sweden)

Enrica Papa

2008-08-01

Full Text Available Il grande evento è stato definito come una forma di “accelerazione” per la trasformazione dei sistemi urbani (Boeri, 2008 e per la costruzione di importanti opere nelle città ospitanti. Questo termine risulta ancora più appropriato se si fa riferimento ad una particolare categoria di infrastrutture: le attrezzature per la mobilità. Il lavoro proposto, partendo da una analisi di casi di studio internazionali, dimostra come la costruzione di sistemi di trasporto in occasione dei grandi eventi risulti occasione di sperimentazione e di costruzione di opere innovative e decisamente orientate ad una mobilità del futuro (Richards, 2001. L’analisi comparativa evidenzia come la costruzione di nuove opere e nuovi servizi di trasporto costituiscano icone mediatiche del grande evento e simboli della città ospitante, contribuendo alla diffusione di soluzioni innovative per la mobilità urbana. Il grande evento in sintesi diventa opportunità per la messa in pratica di prototipi di nuove forma di mobilità, la diffusione e la sperimentazione di nuove tecnologie. Mega events have been defined as a form of “speeding up” for urban system transformation (Boeri 2008 and for the implementation of ground-breaking policies in host cities. This term is even more appropriate if is referred to the construction of pioneering mobility systems. Big events and in particular Expo constitute opportunities for the building up of innovative solution for urban mobility, the diffusion and the testing of new technology and prototypes. This article, starting from a review of international study cases, shows how the construction of mobility systems for International Expo is an occasion of testing and constructing innovative transport infrastructures oriented to the mobility of the future (Richards 2001. The article illustrate this phenomena trough the study of the evolution during the last fifty years of transport planning and design in ten different Expo, describing

A Monte Carlo neutron transport code for eigenvalue calculations on a dual-GPU system and CUDA environment

Energy Technology Data Exchange (ETDEWEB)

Liu, T.; Ding, A.; Ji, W.; Xu, X. G. [Nuclear Engineering and Engineering Physics, Rensselaer Polytechnic Inst., Troy, NY 12180 (United States); Carothers, C. D. [Dept. of Computer Science, Rensselaer Polytechnic Inst. RPI (United States); Brown, F. B. [Los Alamos National Laboratory (LANL) (United States)

2012-07-01

Monte Carlo (MC) method is able to accurately calculate eigenvalues in reactor analysis. Its lengthy computation time can be reduced by general-purpose computing on Graphics Processing Units (GPU), one of the latest parallel computing techniques under development. The method of porting a regular transport code to GPU is usually very straightforward due to the 'embarrassingly parallel' nature of MC code. However, the situation becomes different for eigenvalue calculation in that it will be performed on a generation-by-generation basis and the thread coordination should be explicitly taken care of. This paper presents our effort to develop such a GPU-based MC code in Compute Unified Device Architecture (CUDA) environment. The code is able to perform eigenvalue calculation under simple geometries on a multi-GPU system. The specifics of algorithm design, including thread organization and memory management were described in detail. The original CPU version of the code was tested on an Intel Xeon X5660 2.8 GHz CPU, and the adapted GPU version was tested on NVIDIA Tesla M2090 GPUs. Double-precision floating point format was used throughout the calculation. The result showed that a speedup of 7.0 and 33.3 were obtained for a bare spherical core and a binary slab system respectively. The speedup factor was further increased by a factor of {approx}2 on a dual GPU system. The upper limit of device-level parallelism was analyzed, and a possible method to enhance the thread-level parallelism was proposed. (authors)

A Monte Carlo neutron transport code for eigenvalue calculations on a dual-GPU system and CUDA environment

International Nuclear Information System (INIS)

Liu, T.; Ding, A.; Ji, W.; Xu, X. G.; Carothers, C. D.; Brown, F. B.

2012-01-01

Monte Carlo (MC) method is able to accurately calculate eigenvalues in reactor analysis. Its lengthy computation time can be reduced by general-purpose computing on Graphics Processing Units (GPU), one of the latest parallel computing techniques under development. The method of porting a regular transport code to GPU is usually very straightforward due to the 'embarrassingly parallel' nature of MC code. However, the situation becomes different for eigenvalue calculation in that it will be performed on a generation-by-generation basis and the thread coordination should be explicitly taken care of. This paper presents our effort to develop such a GPU-based MC code in Compute Unified Device Architecture (CUDA) environment. The code is able to perform eigenvalue calculation under simple geometries on a multi-GPU system. The specifics of algorithm design, including thread organization and memory management were described in detail. The original CPU version of the code was tested on an Intel Xeon X5660 2.8 GHz CPU, and the adapted GPU version was tested on NVIDIA Tesla M2090 GPUs. Double-precision floating point format was used throughout the calculation. The result showed that a speedup of 7.0 and 33.3 were obtained for a bare spherical core and a binary slab system respectively. The speedup factor was further increased by a factor of ∼2 on a dual GPU system. The upper limit of device-level parallelism was analyzed, and a possible method to enhance the thread-level parallelism was proposed. (authors)

Citotossicity in immune system's cells exposed in vitro to a microwave electromagnetic field in two different exposure systems operating at mobile telephones frequencies; Citotossicita' in cellule del sistema immunitario esposte in vitro al campo elettromagnetico a microonde in due diversi sistemi espositivi operanti alle frequenze della telefonia mobile

Energy Technology Data Exchange (ETDEWEB)

Scarcella, E.; Ardoino, L.; Galloni, P.; Mancini, S.; Marino, C. [ENEA, Divisione Protezione dell' Uomo e degli Ecosistemi, Centro Ricerche Casaccia, Rome (Italy)

2001-07-01

The large growth in the use of cellular telephones has led to an increasing effort, by national and international Research Institutes, in the studies dealing with EM fields' toxicological effects and interaction mechanisms in relation to various biological systems. In order to that, in the labs of ENEA Casaccia - Human and ecosystems protection division, Toxicology and biomedical sciences section - within the research program on biological effects of electromagnetic fields, a new experimental project has been performed; its main subject has been the evaluation of possible in vitro functionality alterations in a stabilized murine macrophages cell line (RAW 264.7), after exposure to 900 MHz EM radiation. Furthermore, the standardization of two different exposure systems, working at 900 MHz in a large power density range (1 to 100 W/m{sup 2}), has bee carried out, in order to ensure homogeneity of electromagnetic field exposure, correct incubation conditions and reproducibility of experiments. Both the standardization procedures and the experimental results, which showed significant differences on cell growth and functionality only with the higher level exposure (100 W/m{sup 2}), with recovery 48 hours after exposure, will be useful to experimental procedures in progress about deepening on in vitro toxicological evaluations. [Italian] Il forte impulso dell'utilizzo di telefoni cellulari ha richiesto, da parte dei principali organi di ricerca nazionali ed internazionali, l'approfondimento degli studi per la valutazione di implicazioni tossicologiche e per lo studio dei meccanismi d'interazione del campo EM con diversi sistemi biologici. A tal proposito e' stata intrapresa nei laboratori ENEA Casaccia, Divisione Protezione dell'Uomo e degli Ecosistemi - Sezione Tossicologia e Scienze Biomediche (PRO-TOSS), nell'ambito dell'attivita' di ricerca sugli effetti biologici dei campi elettromagnetici, una nuova linea di

Accelerating solidification process simulation for large-sized system of liquid metal atoms using GPU with CUDA

Energy Technology Data Exchange (ETDEWEB)

Jie, Liang [School of Information Science and Engineering, Hunan University, Changshang, 410082 (China); Li, KenLi, E-mail: lkl@hnu.edu.cn [School of Information Science and Engineering, Hunan University, Changshang, 410082 (China); National Supercomputing Center in Changsha, 410082 (China); Shi, Lin [School of Information Science and Engineering, Hunan University, Changshang, 410082 (China); Liu, RangSu [School of Physics and Micro Electronic, Hunan University, Changshang, 410082 (China); Mei, Jing [School of Information Science and Engineering, Hunan University, Changshang, 410082 (China)

2014-01-15

Molecular dynamics simulation is a powerful tool to simulate and analyze complex physical processes and phenomena at atomic characteristic for predicting the natural time-evolution of a system of atoms. Precise simulation of physical processes has strong requirements both in the simulation size and computing timescale. Therefore, finding available computing resources is crucial to accelerate computation. However, a tremendous computational resource (GPGPU) are recently being utilized for general purpose computing due to its high performance of floating-point arithmetic operation, wide memory bandwidth and enhanced programmability. As for the most time-consuming component in MD simulation calculation during the case of studying liquid metal solidification processes, this paper presents a fine-grained spatial decomposition method to accelerate the computation of update of neighbor lists and interaction force calculation by take advantage of modern graphics processors units (GPU), enlarging the scale of the simulation system to a simulation system involving 10 000 000 atoms. In addition, a number of evaluations and tests, ranging from executions on different precision enabled-CUDA versions, over various types of GPU (NVIDIA 480GTX, 580GTX and M2050) to CPU clusters with different number of CPU cores are discussed. The experimental results demonstrate that GPU-based calculations are typically 9∼11 times faster than the corresponding sequential execution and approximately 1.5∼2 times faster than 16 CPU cores clusters implementations. On the basis of the simulated results, the comparisons between the theoretical results and the experimental ones are executed, and the good agreement between the two and more complete and larger cluster structures in the actual macroscopic materials are observed. Moreover, different nucleation and evolution mechanism of nano-clusters and nano-crystals formed in the processes of metal solidification is observed with large

Distribution of Aerially Applied Malathion-S{sup 35} in a Forest Ecosystem; Distribution du malathion- {sup 35}S pulverise par avion dans un ensemble ecologique forestier; Raspredelenie malationa, mechennogo S35 i raspylyaemogo s vozdukha dlya izucheniya ehkologicheskoj sistemy lesnykh massivov; Distribucion en un sistema ecologico forestal de malation- 35S pulverizado desde el aire

Energy Technology Data Exchange (ETDEWEB)

Giles, Jr., R. H.; Peterle, T. J. [Ohio Co-Operative Wildlife Research Unit, Columbus, OH (United States)

1963-09-15

insecticida pulverizado. Por toma de muestras de tierra y recuento de zonas delimitadas se estudio la distribucion bajo la superficie del suelo. Las muestras de agua tomadas en arroyos intermitentes y los ensayos realizados con insectos, mamiferos, reptiles y aves indicaron la distribucion inicial y subsiguiente del insecticida y sus metabolitos en el sistema ecologico. Los estudios de la poblacion animal siguieron durante los veranos de 1961 y 1962; en el verano de 1963 se reuniran todavia algunos datos. Los resultados preliminares indican que la poblacion de insectos vuelve a la normalidad unas tres semanas despues del tratamiento; no se observo efecto alguno en los animales vertebrados de la zona tratada. (author) [Russian] Raspredelenie malationa (0,0-dimetilditiofosfat diehtilmerkaptoyantarnoj kisloty) v lesnom massive vostochnoj chasti Tsentral'nogo Ogajo, SSHA, izuchalos' vesnoj 1962 goda. Ehtot insektitsid shirokogo dejstviya byl vybran dlya izucheniya v svyazi s ego vozrastayushchej rol'yu v bor'be s mnogimi vazhnymi nasekokymi-vreditelyami listvennykh i khvojnykh lesov Soedinennykh Shtatov. Dlya rasshireniya znanij po ehkologii lesnykh massivov, a takzhe bolee polnogo ponimaniya vliyaniya insektitsidov na faunu byla ispol'zovana svoeobraznaya vozmozhnost' izucheniya ehtikh problem odnovremenno posredstvom primeneniya mechennykh izotopami insektitsidov. S{sup 35} byla vybrana vvidu nizkoj ehnergii beta-izlucheniya (0,167 Mehv) i dostatochno korotkogo perioda poluraspada (87,1 dnya). Predvaritel'noe issledovanie uchastka zemli 0,1 akra letom 1961 goda pokazalo stepen' vozmozhnogo' primeneniya v usloviyakh obshchej radiatsii, a takzhe vozmozhnost' razrabotat' podgotovitel'nye metody dlya vzyatiya prob. Letom 1961 goda byl proveden obzor fauny dvukh bassejnov reki ploshchad'yu v 20 akrov kazhdyj. V mae 1962 goda odin iz nikh byl obrabotan tekhnicheski-chistym malationom v kolichestve 2 funtov na 1 akr v smesi s ksilolom, tritonom X-155 (ehmul'gator) i vodoj. Malation

Meccanica razionale

CERN Document Server

Finzi, Bruno

1955-01-01

Introduzione ; teorie introduttive ; calcolo vettoriale ; calcolo tensoriale ; cinematica : punti e sistemi mobili, spostamento, movimento, velocità, accelerazione, cinematica relativistica ; statica : nozioni preliminari e statica del punto, statica dei corpi rigidi, statica dei sistemi deformabili, principio dei lavori virtuali dinamica fisica : concetti e leggi fondamentali, azioni e caratteristiche meccaniche, meccanica relativa, meccanica relativistica, dimensioni e unità di misura delle quantità meccaniche ; calcolo del movimento : dinamica del punto materiale, dinamica del corpo rigido, dinamica dei sistemi, dinamica dei continui deformabili, dinamica impulsiva, meccanica statistica.

Tüketici Fiyat Endeksinin Uyarlamalı Ağa Dayalı Bulanık Çıkarım Sistemi ile Kestirimi / Consumer Price Index Forecast with Adaptive Neuro Fuzzy Inference System

Directory of Open Access Journals (Sweden)

Serenay VAROL

2016-04-01

Full Text Available Son yıllarda zaman serisi tahmini için birçok alternatif yöntem önerilmiştir. Uyarlamalı ağa dayalı bulanık çıkarım sistemi (ANFIS öngörü problemi için literatürde en çok uygulanan bulanık çıkarım sistemidir. Bu çalışmada tüketici fiyat endeksinin kestiriminde ANFIS’in performansı incelenmiştir. Çalışmanın sonucunda ANFIS yöntemi ile ilgilenilen zaman aralığındaki tüketici fiyat endeksinin kestiriminde ulaşılan sonuçlar yorumlanmıştır. / Alternative methods have been proposed for time series prediction in last years. Adaptive neuro fuzzy inference system (ANFIS is the most used fuzzy inference system in literature for prediction problem. In this study, the performance of ANFIS in forecasting consumer price index is examined, and the results of the consumer price index estimation in time period, on which ANFIS method is applied, are interpreted.

[National epidemiological surveillance systems of mesothelioma cases].

Science.gov (United States)

Ferrante, Pierpaolo; Binazzi, Alessandra; Branchi, Claudia; Marinaccio, Alessandro

2016-01-01

INTRODUZIONE: sebbene la relazione causale tra esposizione ad amianto e malattie neoplastiche sia ben nota, in molti Paesi il consumo del materiale è ancora rilevante e crescente. A causa della lunga latenza, nei Paesi dove è stato bandito (come in Italia) è oggi in corso un'epidemia di malattie correlate ad amianto. OBIETTIVI: descrivere i sistemi di sorveglianza dei mesoteliomi attivi nel mondo mediante un'analisi comparativa. è stata condotta una revisione bibliografica della letteratura disponibile sui sistemi di sorveglianza epidemiologica dei mesoteliomi attivi nel mondo, comparando metodi e risultati disponibili. RISULTATI: sistemi di ricerca dei casi incidenti e di analisi anamnestica dei soggetti ammalati sono attivi solo in Italia, Francia e Corea del Sud. I Paesi presso i quali sono attivi sistemi di rilevazione e controllo dei casi incidenti di mesotelioma sono quelli in cui vige il bando dell'amianto e che hanno sperimentato consumi rilevanti in passato. Non sono stati istituiti sistemi epidemiologici di sorveglianza in molti Paesi dove il consumo di amianto è ancora importante (inclusi Russia, Cina, India e Brasile). CONCLUSIONI: si conferma l'importanza dei sistemi di sorveglianza epidemiologica dei mesoteliomi per la sanità pubblica, il sostegno alle politiche di welfare e la prevenzione dei rischi. Lo sviluppo di progetti per tendere a una maggiore uniformità nei metodi di ricerca dei casi, di classificazione delle diagnosi e dell'esposizione e nelle tecniche di analisi dei dati potrebbe consentire una maggiore fruibilità dei dati aggregati. La disponibilità di dati internazionali confrontabili può essere di stimolo all'adozione di provvedimenti di bando internazionale.

IMPREMAS Project, Pilo project for the integration between Environmental Management System and safety Management System; Il Progetto IMPREMAS, Progetto pilota per l'eco-gestion delle Piccole e Medie Imprese classificate a rischio per l'uso e lo stoccaggio di sostanze pericolose previste dal DPR 17.5.1988 n. 175

Energy Technology Data Exchange (ETDEWEB)

Luciani, R.; Andriola, L.; Brunetti, N.; Caropreso, G. [ENEA, Centro Ricerche Casaccia, Rome (Italy). Dipt. Ambiente

1999-07-01

The topic discussed in this report can be inserted within the context of case studies carried out by ENEA in the promotion of Environmental Management Systems (EMAS-ISO14000). During the IMPREMAS project ENEA has therefore set up a method of integration between Environmental Management System and Safety Management System. [Italian] L'argomento trattato nel presente lavoro si inserisce nel contesto degli studi effettuati dall'ENEA nella promozione dei Sistemi di Gestione Ambientale (EMAS-ISO14000). ENEA durante il progetto IMPREMAS ha sviluppato un metodo per l'integrazione dei Sistemi di Gestione Ambientale con i Sistemi di Gestione della Sicurezza.

Major accident analyses for experimental zero-power fast reactor assemblies; Analyse des accidents graves pouvant survenir dans les reacteurs experimentaux a neutrons rapides de puissance zero; Analiz krupnoj avarii dlya ehksperimental'ny kh reaktornykh ustanovok nulevoj moshchnosti na bystrykh nejtronakh; Analisis de los accidentes graves que pueden producirse en los reactores experimentales rapidos de potencia cero

Energy Technology Data Exchange (ETDEWEB)

Fischer, G.; Barts, E. W.; Kapil, S.; Tomabechi, K. [Argonne National Laboratory, Argonne, IL (United States)

1962-03-15

'shogo reaktora s aktivnoj zonoj obychnogo sostava. Byla issledovana men'shaya aktivnaya zona s vysokim pustotnym koehffitsientom, kak potentsial'no bolee opasnaya sistema. U ehtikh dvukh sistem obnaruzhen ochen' razlichnyj vremennoj rezhim. V sluchayakh ser'eznykh avarij na ustanovkakh nulevoj moshchnosti atomy U{sup 235}, kotorye raspredeleny v plastinakh obogashchennogo urana, ochen' bystro nagrevayutsya, togda kak ostal'naya chast' aktivnoj zony po sushchestvu ostaetsya kholodnoj, i takim obrazom gazoobraznyj U{sup 235} sozdaet raspredelennoe davlenie. V doklade budet dano opisanie primeneniya k gazu Van der Vaalsa koda AX-I nejtronnoj fiziki i gidrodinamiki. Drugim vazhnym izmeneniem uravneniya sostoyaniya, ispol'zovannogo v kode, yavlyaetsya primenenie uravneniya Mie-Grinejzena, vyvedennoe iz teorii tverdogo sostoyaniya. EHto izmenenie daet vozmozhnost' bolee udovletvoritel'n o vyrazit' chlen davleniya dlya aktivnykh zon razlichnogo sostava. Vvidu togo, chto plastiny U{sup 235} s vysokim obogashcheniem v ustanovke nulevoj moshchnosti nagrevayutsya gorazdo bystree, chem obednennye uranovye plastiny, vozmozhnost' polucheniya rezul'tiruyushcheg o polozhitel'nogo ehffekta Dopplera namnogo bol'she v ehksperimental'noj ustanovke, chem v reaktore-razmnozhitel e ehkvivalentnoj moshchnosti. EHtot risk byl issledovan v otnoshenii ryada vozmozhnykh ustanovok. Ehti raschety ukazyvayut na to, chto koehffitsient Dopplera ustanovki nulevoj moshchnosti ne priobretaet opasnogo znacheniya, poka ne budut sozdany sistemy krupnykh ehnergeticheskikh reaktorov-razmnozhitelej na oksidnom toplive s ochen' myagkimi spektrami ehnergii nejtronov. (author)

The Co{sup 60} Irradiation Facility and the Gamma Field at Riso; Appareil d'irradiation au cobalt-60 et champ sous irradiation gamma, a Riso; Ustanovka dlya obluchenij, rabotayushchaya na So60, i pole gamma-luchej v rizo; Instalacion de irradiacion con cobalto-60 y campo de irradiacion gamma en el centro de Riso

Energy Technology Data Exchange (ETDEWEB)

Brynjolfsson, A; Holm, N W [Danish Atomic Energy Commission, Establishment Riso (Denmark)

1960-07-15

. En la memoria se facilitan detalles relativos a su construccion y a las normas de seguridad que se han observado en el proyecto. Las determinaciones dosimetricas se han efectuado con ayuda de cuatro tipos de aparatos diferentes: 1. Camaras de ionizacion 2. Calorimetros 3. Dosimetros de Fricke 4. Peliculas fotograficas. En la memoria se hace asimismo una descripcion general del campo de irradiacion gamma y se dan detalles referentes a la posicion de la fuente. La intensidad de irradiacion es de unos 100 roentgens/hora a una distancia de 1 m. Las plantas sometidas a la irradiacion se cultivan en un campo de 15 m de radio. Se indican brevemente los diferentes productos que se han sometido a irradiacion en las dos instalaciones. (author) [Russian] V doklade opisyvayutsya ustanovka dlya obluchenij na Co{sup 60} i pole gammaluchej v Otdelenii sel'skogo khozyajstva Nauchno-issledovatel'skogo tsentra v Rizo. Ustanovka dlya obluchenij na Co{sup 60} soderzhit 1800 kyuri Co{sup 60}. Dayutsya detali konstruktsii, a takzhe ukazyvayutsya mery bezopasnosti, kotorye uchteny v konstruktsii ustanovki. Dozimetriya proizvoditsya pri pomoshchi chetyrekh razlichnykh metodov: 1. Ionizatsionnykh kamer; 2. Kalorimetrii 3. Dozimetra Frikke 4. Fotograficheskikh plenok Daetsya obshchee opisanie polya gamma-izluchenij, vklyuchaya detali raspolozheniya istochnikov. Norma dozirovaniya - priblizitel'no 100r/ch na rasstoyanii v odin metr. Dlya vyrashchivaniya obluchaemykh rastenij beretsya pole s radiusom v 15 metrov. Daetsya kratkoe ukazanie kategorii produktov, podvergaemykh oblucheniyu v dvukh ustanovkakh. (author)

Some possible uses of radioisotopes in the rubber industry; Certaines possibilites d'emploi des radioisotopes dans l'industrie du caoutchouc; Nekotorye vozmozhnosti ispol'zovaniya radioaktivnykh izotopov v rezinovoj promyshlennosti; Algunas posibilidades de utilizacion de los radioisotopos en la industria del caucho

Energy Technology Data Exchange (ETDEWEB)

Shimorda, J; Mozhishek, M; Klimanek, L; Staroba, J [Nauchno-Issledovatel' skij Institut Tekhnologii Reziny i Plastmass (NIITRP), Gorod Gotval' dov, Chekhoslovatskaya Sotsialisticheskaya Respublika (Czech Republic)

1962-01-15

A method is described for using beta-emitters (Tl{sup 204} and S{sup 35}) for measuring the wearing qualities of motor-vehicle tyres, checking the homogeneity of tyre rubber, and non-contact thickness-gauging of rubberized fabrics. (author) [French] Le memoire expose une methode permettant d'employer des emetteurs beta ({sup 204}Tl et {sup 35}S) pour la mesure de la resistance des pneumatiques d'automobiles, le controle de l'uniformite du caoutchouc des pneus et la mesure sans contact de l'epaisseur des tissus caoutchoutes. (author) [Spanish] Los autores describen un metodo de utilizacion de emisores {beta} ({sup 204}Tl y {sup 35}S) para la medicion de la resistencia al desgaste de los neumaticos de automovil para la verificacion de la homogeneidad del caucho destinado a la fabricacion de neumaticos y para la medicion a distancia del espesor de las telas cauchutadas. (author) [Russian] Opisana metodika ispol'zovaniya beta-izluchatelej (Tl{sup 204} i S{sup 35}) dlya izmereniya velichiny iznosostojkosti avtomobil'nykh shin, dlya kontrolya gomogennosti shinnykh rezin i dlya beskontaktnogo izmereniya tolshchiny obrezinennykh tkanej. (author)

Sistemi upravljanja sadržajem - pojam i karakteristike / Content management systems: Concept and features

Directory of Open Access Journals (Sweden)

Dejan S. Milenković

2010-01-01

Full Text Available Rad predstavlja kratak prikaz osnova programskog rešenja koje je u poslednjih desetak godina okupiralo sve veće i ozbiljne poslovne organizacije koje svoje poslovanje, celokupno ili delimično, zasnivaju na principima Internet tehnologija i elektronskog poslovanja. Sistemi upravljanja sadržajima nametnuli su se kao potreba da se izvrši potpuna automatizacija poslovanja jedne organizacije. U perspektivi, upravljanje dokumentima komandno-informacionih sistemima Vojske Srbije biće zasnovano na sistemima upravljanja sadržajima. / Introduction The paper explains the importance and the role of content management systems, gives an overview of the functionality required by such systems and makes a categorization of existing content management systems, thus performing, to some extent, a systematization of this area. Internet technologies and e-business Electronic business is a set of business activities that occur by ICT, especially Internet. CMS existence is conditioned by the development of Internet technology. Basic terminology, problem and solution The basic terms of which problems are considered in this paper are Content, Content Management and Content Management System. Content management systems demand Content management systems demand is reflected in the following: (1 complex structure and a hierarchy of target groups are major challenges for the selection and implementation of an adequate system of content management in decision-making processes; (2 timely adoption of key decisions and their implementation is currently a considerable advantage over competitors; (3 by applying modern information and communication technologies and service-oriented architecture, content, especially documents, management provides security and protection of information in the process of content managing. Content management systems types This article describes the following types of content management systems: Document Management System, Digital Asset Management

Design and build of fieldbus-based control systems for ENEL thermoelectric plants; Sistemi di controllo con bus di campo. Applicazioni in impianti termoelettrici

Energy Technology Data Exchange (ETDEWEB)

Mazzola, G [Automazione e Robotica, Cesi (Italy); Prandoni, W [Business Unit Processi per la Generazione, Milan (Italy)

2000-06-01

The intention to start first plant-wide control applications based on fieldbus in ENEL (Electric Power Production Company) combined cycle plants demands to define appropriate requirements for design, planning, implementation, technical management and maintenance of control systems. One of the first needs is to express, in the bid specifications for Dc san other plant components, those requirements necessary on one side to guarantee the same levels of performance and reliability of traditional systems, and on the other side to ensure the improvement of the operations of installation and commissioning and of management of normal and abnormal plant behaviour, which are among the main benefits expected from this new technology. The definition of such requirements appears to be complex due to the variety and lack of a homogenous approach of the different market solutions, and also because a real experience of systems of considerable size is still missing. The memory introduces the results and problems met in the requirement specification phase, and the activity of definition of a pilot control system for demineralized water production of Fusina power plant. [Italian] In vista delle prime applicazioni negli impianti ENEL a ciclo combinato della tecnologia a bus di campo si presenta la necessita' di esprimere, nelle specifiche di acquisizione del Dcs e dei componenti, i requisiti necessari da un lato a garantire i medesimi livelli di prestazione e sicurezza dei sistemi tradizionali, dall'altro ad assicurare il miglioramento delle operazioni di installazione e delle strategie di conduzione e manutenzione dell'impianto, che sono come i ritorni piu' promettenti di questa nuova tecnologia. L'articolo presenta le principali problematiche emerse e l'attivita' di definizione di un'esperienza pilota su un impianto in esercizio nella centrale termoelettrica di Fusina.

Design and build of fieldbus-based control systems for ENEL thermoelectric plants; Sistemi di controllo con bus di campo. Applicazioni in impianti termoelettrici

Energy Technology Data Exchange (ETDEWEB)

Mazzola, G. [Automazione e Robotica, Cesi (Italy); Prandoni, W. [Business Unit Processi per la Generazione, Milan (Italy)

2000-06-01

The intention to start first plant-wide control applications based on fieldbus in ENEL (Electric Power Production Company) combined cycle plants demands to define appropriate requirements for design, planning, implementation, technical management and maintenance of control systems. One of the first needs is to express, in the bid specifications for Dc san other plant components, those requirements necessary on one side to guarantee the same levels of performance and reliability of traditional systems, and on the other side to ensure the improvement of the operations of installation and commissioning and of management of normal and abnormal plant behaviour, which are among the main benefits expected from this new technology. The definition of such requirements appears to be complex due to the variety and lack of a homogenous approach of the different market solutions, and also because a real experience of systems of considerable size is still missing. The memory introduces the results and problems met in the requirement specification phase, and the activity of definition of a pilot control system for demineralized water production of Fusina power plant. [Italian] In vista delle prime applicazioni negli impianti ENEL a ciclo combinato della tecnologia a bus di campo si presenta la necessita' di esprimere, nelle specifiche di acquisizione del Dcs e dei componenti, i requisiti necessari da un lato a garantire i medesimi livelli di prestazione e sicurezza dei sistemi tradizionali, dall'altro ad assicurare il miglioramento delle operazioni di installazione e delle strategie di conduzione e manutenzione dell'impianto, che sono come i ritorni piu' promettenti di questa nuova tecnologia. L'articolo presenta le principali problematiche emerse e l'attivita' di definizione di un'esperienza pilota su un impianto in esercizio nella centrale termoelettrica di Fusina.

Regular and chaotic motions in many-body quantum systems; Moti regolari e caotici in sistemi quantici a molti corpi

Energy Technology Data Exchange (ETDEWEB)

Canetta, G.; Maino, G.; Magnani, M.; Visparelli, D. [ENEA, Centro Ricerche Ezio Clementel, Bologna (Italy). Dipt. Innovazione

1999-07-01

The interacting boson model (IBM) is a realistic model of nuclear structure, since it allows to cut off in a suitable way the complete space of the shell model states. In such a way, it offers a great simplicity of the numerical computation of the eigenvalue problem for a many-body non-relativistic quantum system, like a nucleus. In particular, the analytical solutions obtained in the case of dynamical symmetries correspond, in the classical limit, to completely integrable systems showing a regular dynamic behaviour. In this report, a detailed analysis is performed of the IBM version 2 (IBM-2), which explicitly introduces the isospin degree of freedom. The different forms of the IBM-2 Hamiltonian usually considered in the literature, are discussed, and the explicit relations existing between them are deduced. Moreover, the semiclassical limit of the most general IBM-2 Hamiltonian is studied in the details. Finally, the expectation of chaotic dynamic behaviour near to regular dynamics, in the IBM, and, in particular, the fact that the latter ones persist more than expected a priori, is shown. Maybe, this behaviour is to adduce to the existence of partial dynamic symmetries. [Italian] Il modello a bosoni interagenti (IBM) rappresenta un modello realistico della struttura nucleare, premettendo di troncare opportunamente lo spazio completo degli stati di modello a shell, e percio' offre una notevole semplicita' computazionale nella risoluzione numerica del problema degli autovalori per un sistema quantico non relativistico a molti corpi, quale e' un nucleo. In particolare, le soluzioni analitiche ottenute nel caso di simmetrie dinamiche corrispondono, nel limite classico, a sistemi completamente integrabili che mostrano un comportamento dinamico regolare. In questo rapporto viene condotta un'analisi dettagliata del modello IBM nella versione (IBM-2), il quale introduce esplicitamente il grado di liberta' di isospin. In particolare, sono

Sistemi ortofrutticoli sostenibili

Directory of Open Access Journals (Sweden)

Albino Maggio

2011-09-01

Full Text Available The sustainability of agricultural production systems is a recurrent topic in the public debate, tightly linked to resource use efficiency and energy saving principles. "Higher yield with lower input" is the paradigm that will guide us in the years to come. This will unavoidably call for a joint effort of different players from research, production and policy sectors. In this scenario, research has a key role since it is the only instrument that may generate a continuous flux of information that in the short-, medium- and long-term could effectively contribute to defining innovative production systems, more efficient and with a reduced environmental impact. In this short review, some aspects of sustainability in horticultural systems will be presented with a particular focus on the implementation of proven technology, production in saline environments and breeding strategies to improve crops resource use efficiency.

CUDA-Sankoff

DEFF Research Database (Denmark)

Sundfeld, Daniel; Havgaard, Jakob H.; Gorodkin, Jan

2017-01-01

the Sankoff 4-dimensional dynamic programming (4D DP) matrix and we propose a two-level wavefront approach to exploit the parallelism. The results were obtained with two different NVidia GPUS, comparing sets of real RNA sequences with lengths from 46 to 281 nucleotides. We show that our GPU approach is up...

CUDA-Sankoff

DEFF Research Database (Denmark)

Sundfeld, Daniel; Havgaard, Jakob H.; Gorodkin, Jan

2017-01-01

In this paper, we propose and evaluate CUDASankoff, a solution to the RNA structural alignment problem based on the Sankoff algorithm in Graphics Processing Units (GPUS). To our knowledge, this is the first time the Sankoff algorithm is implemented in GPU. In our solution, we show how to lineariz...... to 24 times faster than a 16-core CPU solution in the 281 nucleotide Sankoff execution....

Geothermal energy in Italy and abroad; La geotermia in Italia e all'estero

Energy Technology Data Exchange (ETDEWEB)

Caputo di Calvisi, C. [Rome Univ. La Sapienza, Rome (Italy). Dipt. di Meccanica

2001-04-01

Geothermal systems and fields are analysed giving particular evidence to the value of the geothermal source as an important natural source of energy. The paper analyses hydrothermal systems and describes the international experimental studies on the use of geothermal reservoirs in hot rocks with geopressured and magmatic systems. Experts are optimistic as far as the use of this innovative source of energy is possible in the medium-short term. [Italian] Si analizzano i sistemi e i campi geotermici, sottolineando il valore della fonte geotermica come risorsa naturale ragguardevole d'energia. Vengono descritti i sistemi idrotermali e gli esperimenti condotti a livello internazionale sull'utilizzo di serbatoi geotermici in rocce calde con sistemi geopressurizzati e magmatici. L'ottimismo degli esperti sull'utilizzo di questa innovativa sorgente d'energia in tempi medio-brevi.

Automatic Sample Changing System for Gamma-Ray Spectrometry; Changeur Automatique d'Echantillons Pourla Spectrometrie Gamma; Avtomaticheskaya sistema dlya smeny obraztsov pri gamma-spektrometrii; Cambiador Automatico de Muestras para Espectroscopia Gamma

Energy Technology Data Exchange (ETDEWEB)

Lamson, K. C.; Sesko, W. J.; Nicholson, G. C. [Northeastern Radiological Health Laboratory, Winchester, MA (United States)

1965-10-15

ha solicitado una patente, viene funcionando satisfactoriamente desde hace mas de un ano en el Northeastern Radiological Health Laboratory. Su costo total, inclusive la mano de obra, fue inferior a 2000 dolares. (author) [Russian] Obnaruzhenie prirodnyh kolichestv gamma-izluchajushhih radioizotopov v biologicheskoj srede trebuet vysokoj chuvstvitel'nosti schetnoj sistemy. Dlja togo, chtoby poluchit' dostatochno tochnye dannye, trebuetsja mnogo vremeni, ot odnogo do neskol'kih chasov. Naibolee jeffektivnoe ispol'zovanie dorogostojashhego gamma-spektrometricheskogo schetnogo oborudovanija s nizkim fonom trebuet ego nepreryvnoj raboty. Dlja jetogo neobhodimo libo postojannoe prisutstvie personala, libo nalichie polnost'ju avtomatizirovannoj sistemy, vkljuchajushhej smenu obrazcov i registraciju dannyh. Cel'ju nastojashhego doklada javljaetsja opisanie avtomatizirovannoj gamma-spektrometricheskoj schetnoj sistemy, sproektirovannoj, izgotovlennoj i rabotajushhej v radiologicheskoj laboratorii v Uinchestere, shtat Massachusets. Prisposoblenie dlja smeny obrazcov bylo sproektirovano dlja raboty v sochetanii s bol'shim stal'nym jekranirovannym kontejnerom, i dlja jetoj celi mozhno legko primenit' ljuboe imejushheesja v prodazhe prisposoblenie takogo roda s otkryvajushhejsja perednej dvercej. Prisposoblenie oborudovano takim obrazom, chtoby obrabatyvat' razlichnye obrazcy, v tom chisle biologicheskie i medicinskie. Ono sostoit iz vrashhajushhegosja lotka, rasschitannogo na shestnadcat' obrazcov, sistemy periodicheskoj krugovoj podachi dlja ustanovki obrazcov v nuzhnoe polozhenie, mehanicheskoj ruki s jelektromagnitom dlja vvedenija i vyemki obrazcov iz kontejnera i rychaga dlja otkryvanija i zakryvanija dvercy kontejnera. Sistema dlja smeny obrazcov soedinena s mnogokanal'nym analizatorom, kotoryj obespechivaet bezopasnost', preryvaja cikl v sluchae neispravnosti v ljuboj faze. Posle zadannogo vremeni scheta dannye nanosjatsja putem punshirovanija na bumazhnuju lentu i

Progress towards phosphorus-33 production: studies on the enrichment of sulphur-33 by means of anion exchangers; Mise au point d'une methode de production du phosphore-33: etudes sur l'enrichissement du soufre-33 au moyen d'echangeurs anioniques; Uspekhi v poluchenii fosfora-33: izuchenie obogashcheniya sery-33 pri pomoshchi anionnykh obmennikov; Progresos on la produccion de fosforo-33: estudios realizados sobre el enriquecimiento del azufre-33 por medio de intercambiadores anionicos

Energy Technology Data Exchange (ETDEWEB)

Forberg, S; Westermark, T [Division of Physical Chemistry, Kungl. Tekniska Hogskolan, Stockholm 70 (Sweden)

1962-01-15

{sup 33}S mediante intercambio quimico entre el HSO{sub 3}{sup -} y el H{sub 2}SO{sub 3} para la produccion del {sup 33}P, por ser el metodo que mejores perspectivas ofrece. Encontraron que el desplazamiento mediante HCl del HSO{sub 3}{sup -} fijado en los intercambiadores anionicos constituye un metodo excelente para lograr condiciones de contracorriente y de reflujo total en este sistema. Destacan algunos inconvenientes del metodo, que derivan de la necesidad de trabajar con un reflujo muy intenso. En el instituto de tecnologia de Estocolmo se ha construido una instalacion en que se aplica este proceso, y la memoria indica los parametros obtenidos y la experiencia adquirida durante su funcionamiento, asi como los resultados experimentales. El enriquecimiento obtenido, muy inferior al calculado segun los resultados de laboratorio, se atribuye a la formacion de una ''cola'' de H{sub 2}SO{sub 3} en la fase HCl. Los autores han investigado este problema y encuentran que quiza se pudiera resolver empleando disolventes organicos en vez de soluciones acuosas. (author) [Russian] V kachestve naibolee perspektivnogo sposoba polucheniya P{sup 33} bylo vybrano obogashchenie S{sup 33} khimicheskim obmenom mezhdu HSO{sub 3} i H{sub 2}SO{sub 3}. Vytesnenie HSO{sub 3} pri pomoshchi HCl iz anionnykh obmennikov okazalos' ochen' udobnym metodom dlya polucheniya protivotecheniya i sozdaniya massovogo potoka flegmy dlya ehtoj sistemy. Ukazyvayutsya nekotorye prisushchie sisteme nedostatki, svyazannye s trebovaniyami intensivnogo potoka flegmy. Dlya osushchestvleniya ehtogo protsessa pri institute byla sozdana osobaya ustanovka, v doklade izlagayutsya poluchennye parametry, operativnyj opyt i rezul'taty. Blagodarya obrazovaniyu H{sub 2}SO{sub 3} pri vytesnenii HSO{sub 3} s pomoshch'yu HCl dostigalos' znachitel'no men'shee obogashchenie, chem ehto predpolagalos' pri provedenii laboratornykh rabot. Bylo provedeno izuchenie ehtoj problemy, i vozmozhnym putem, veroyatno

A punched-card library of neutron cross-sections and its use in the mechanized preparation of group cross-sections for use in Monte Carlo, Carlson S{sub n} and other multi-group neutronics calculations on high-speed computers

Energy Technology Data Exchange (ETDEWEB)

Parker, K [Atomic Weapons Research Establishment, Aldermaston (United Kingdom)

1962-03-15

vklyuchayut mnogogruppovoe transportnoe priblizhenie i polnuyu obrabotku anizotropnogo rasseyaniya, ispol'zuya momenty mnogochlena Lezhandra matritsy peredachi rasseyaniya. Printsipy obrazovaniya gruppovoj postoyannoj obsuzhdayutsya i illyustriruyutsya pri pomoshchi opisaniya sistem gruppovykh postoyannykh, podkhodyashchikh dlya raschetov reaktorov na bystrykh nejtronakh. Obsuzhdayutsya takie prakticheskie problemy, kak ehmpiricheskoe sogla- sovanie gruppovykh postoyannykh dlya vosproizvodstva integral'nykh rezul'tatov i prive-denie mnogogruppovoj sistemy postoyannykh k malogruppovoj sisteme. (author)

Grammar-Based Multi-Frontal Solver for One Dimensional Isogeometric Analysis with Multiple Right-Hand-Sides

KAUST Repository

Kuźnik, Krzysztof; Paszyński, Maciej; Calo, Victor M.

2013-01-01

on NVIDIA CUDA GPU, delivering logarithmic execution time for linear, quadratic, cubic and higher order B-splines. Thus, the CUDA implementation delivers the optimal performance predicted by our graph grammar analysis. We utilize the solver for multiple

Remote control systems evolution in the new open energy market; Evoluzione del telecontrollo nel nuovo mercato dell'energia

Energy Technology Data Exchange (ETDEWEB)

Castiglioni, L. [Soluzioni hardware/software per l' automazione e il controllo degli impianti industriali, Taizzano sul Naviglio, Milan (Italy)

2001-12-01

Considering new energy market in Italy, the new role of remote control applications is discussed. In the open market the whole electric process is managed by several different actors; common protocol scheme and additional sharing data policies are necessaries facing the increased communications requirements due to deregulation. Remote control systems evolution then will lead from process oriented to data management oriented systems; related methodologies and solutions are described. [Italian] Il telecontrollo, nell'ambito del nuovo mercato dell'energia, diviene di importanza fondamentale per la necessita' di condivisione dei dati verso il livello di pianificazione e di analisi prestazionale. Viene individuata una linea evolutiva per i sistemi di telecontrollo, dove da un'attenzione rivolta al processo si passa a sistemi orientati all'apertura verso l'esterno e al data management. Vengono descritte alcune metodologie orientate allo scambio dati tra centri e verso sistemi esterni.

Ratoath Manor Nursing Home, Ratoath, Meath.

LENUS (Irish Health Repository)

Klus, Petr

2012-01-13

Abstract Background With the maturation of next-generation DNA sequencing (NGS) technologies, the throughput of DNA sequencing reads has soared to over 600 gigabases from a single instrument run. General purpose computing on graphics processing units (GPGPU), extracts the computing power from hundreds of parallel stream processors within graphics processing cores and provides a cost-effective and energy efficient alternative to traditional high-performance computing (HPC) clusters. In this article, we describe the implementation of BarraCUDA, a GPGPU sequence alignment software that is based on BWA, to accelerate the alignment of sequencing reads generated by these instruments to a reference DNA sequence. Findings Using the NVIDIA Compute Unified Device Architecture (CUDA) software development environment, we ported the most computational-intensive alignment component of BWA to GPU to take advantage of the massive parallelism. As a result, BarraCUDA offers a magnitude of performance boost in alignment throughput when compared to a CPU core while delivering the same level of alignment fidelity. The software is also capable of supporting multiple CUDA devices in parallel to further accelerate the alignment throughput. Conclusions BarraCUDA is designed to take advantage of the parallelism of GPU to accelerate the alignment of millions of sequencing reads generated by NGS instruments. By doing this, we could, at least in part streamline the current bioinformatics pipeline such that the wider scientific community could benefit from the sequencing technology. BarraCUDA is currently available from http:\\/\\/seqbarracuda.sf.net

A Large Scale, High Resolution Agent-Based Insurgency Model

Science.gov (United States)

2013-09-30

CUDA) is NVIDIA Corporation’s software development model for General Purpose Programming on Graphics Processing Units (GPGPU) ( NVIDIA Corporation ...Conference. Argonne National Laboratory, Argonne, IL, October, 2005. NVIDIA Corporation . NVIDIA CUDA Programming Guide 2.0 [Online]. NVIDIA Corporation

An optimization of a GPU-based parallel wind field module

International Nuclear Information System (INIS)

Pinheiro, André L.S.; Shirru, Roberto

2017-01-01

Atmospheric radionuclide dispersion systems (ARDS) are important tools to predict the impact of radioactive releases from Nuclear Power Plants and guide people evacuation from affected areas. Four modules comprise ARDS: Source Term, Wind Field, Plume Dispersion and Doses Calculations. The slowest is the Wind Field Module that was previously parallelized using the CUDA C language. The statement purpose of this work is to show the speedup gain with the optimization of the already parallel code of the GPU-based Wind Field module, based in WEST model (Extrapolated from Stability and Terrain). Due to the parallelization done in the wind field module, it was observed that some CUDA processors became idle, thus contributing to a reduction in speedup. It was proposed in this work a way of allocating these idle CUDA processors in order to increase the speedup. An acceleration of about 4 times can be seen in the comparative case study between the regular CUDA code and the optimized CUDA code. These results are quite motivating and point out that even after a parallelization of code, a parallel code optimization should be taken into account. (author)

An optimization of a GPU-based parallel wind field module

Energy Technology Data Exchange (ETDEWEB)

Pinheiro, André L.S.; Shirru, Roberto [Coordenacao de Pos-Graduacao e Pesquisa de Engenharia (PEN/COPPE/UFRJ), Rio de Janeiro, RJ (Brazil). Programa de Engenharia Nuclear; Pereira, Cláudio M.N.A., E-mail: apinheiro99@gmail.com, E-mail: schirru@lmp.ufrj.br, E-mail: cmnap@ien.gov.br [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil)

2017-07-01

Atmospheric radionuclide dispersion systems (ARDS) are important tools to predict the impact of radioactive releases from Nuclear Power Plants and guide people evacuation from affected areas. Four modules comprise ARDS: Source Term, Wind Field, Plume Dispersion and Doses Calculations. The slowest is the Wind Field Module that was previously parallelized using the CUDA C language. The statement purpose of this work is to show the speedup gain with the optimization of the already parallel code of the GPU-based Wind Field module, based in WEST model (Extrapolated from Stability and Terrain). Due to the parallelization done in the wind field module, it was observed that some CUDA processors became idle, thus contributing to a reduction in speedup. It was proposed in this work a way of allocating these idle CUDA processors in order to increase the speedup. An acceleration of about 4 times can be seen in the comparative case study between the regular CUDA code and the optimized CUDA code. These results are quite motivating and point out that even after a parallelization of code, a parallel code optimization should be taken into account. (author)

GPU-Based Cloud Service for Smith-Waterman Algorithm Using Frequency Distance Filtration Scheme

Directory of Open Access Journals (Sweden)

Sheng-Ta Lee

2013-01-01

Full Text Available As the conventional means of analyzing the similarity between a query sequence and database sequences, the Smith-Waterman algorithm is feasible for a database search owing to its high sensitivity. However, this algorithm is still quite time consuming. CUDA programming can improve computations efficiently by using the computational power of massive computing hardware as graphics processing units (GPUs. This work presents a novel Smith-Waterman algorithm with a frequency-based filtration method on GPUs rather than merely accelerating the comparisons yet expending computational resources to handle such unnecessary comparisons. A user friendly interface is also designed for potential cloud server applications with GPUs. Additionally, two data sets, H1N1 protein sequences (query sequence set and human protein database (database set, are selected, followed by a comparison of CUDA-SW and CUDA-SW with the filtration method, referred to herein as CUDA-SWf. Experimental results indicate that reducing unnecessary sequence alignments can improve the computational time by up to 41%. Importantly, by using CUDA-SWf as a cloud service, this application can be accessed from any computing environment of a device with an Internet connection without time constraints.

GPU-based cloud service for Smith-Waterman algorithm using frequency distance filtration scheme.

Science.gov (United States)

Lee, Sheng-Ta; Lin, Chun-Yuan; Hung, Che Lun

2013-01-01

As the conventional means of analyzing the similarity between a query sequence and database sequences, the Smith-Waterman algorithm is feasible for a database search owing to its high sensitivity. However, this algorithm is still quite time consuming. CUDA programming can improve computations efficiently by using the computational power of massive computing hardware as graphics processing units (GPUs). This work presents a novel Smith-Waterman algorithm with a frequency-based filtration method on GPUs rather than merely accelerating the comparisons yet expending computational resources to handle such unnecessary comparisons. A user friendly interface is also designed for potential cloud server applications with GPUs. Additionally, two data sets, H1N1 protein sequences (query sequence set) and human protein database (database set), are selected, followed by a comparison of CUDA-SW and CUDA-SW with the filtration method, referred to herein as CUDA-SWf. Experimental results indicate that reducing unnecessary sequence alignments can improve the computational time by up to 41%. Importantly, by using CUDA-SWf as a cloud service, this application can be accessed from any computing environment of a device with an Internet connection without time constraints.

Сравнение эффективности технологий OpenMP, nVidia CUDA И StarPU на примере задачи умножения матриц

OpenAIRE

Ханкин, К. М.; Khankin, K. M.

2013-01-01

Приведено описание технологий OpenMP, nVidia CUDA и StarPU, варианты решения задачи умножения двух матриц с задействованием каждой из технологий и результаты сравнения реализаций по требовательности к ресурсам. In the article the description of OpenMP, nVidia CUDA and StarPU technologies, probable solutions of two matrix multiplication problem applying these technologies and the result of solution comparison by the criterion of resource consumption are considered. Ханкин Константи...

Fundamental Mechanisms of NeuroInformation Processing: Inverse Problems and Spike Processing

Science.gov (United States)

2016-08-04

Neurokernel software using the Python programming language and the PyCUDA in- terface to NVIDIAs CUDA GPU programming environment to avail ourselves of the...Neuroscience, UCSD. Marius Buibas, Scientist, Brain Corporation , San Diego, California. Gaute T. Einevoll, Department of Mathematical Sciences

Sistemi za neposredno komunikacijo

OpenAIRE

KRAJAČIĆ, IVAN

2016-01-01

V sodobnem času imamo na voljo več načinov neposredne komunikacije, ki jih tehnično poimenujemo s pojmom poenotene komunikacije. Poslovnega sveta si v prihodnosti skoraj ni mogoče zamisliti brez ene izmed rešitev poenotenih komunikacij, saj s funkcionalnostmi, ki so del le teh, podjetja izboljšujejo svojo produktivnost, obenem pa zmanjšujejo stroške. Cilj poenotenih komunikacij je zagotoviti dosledno uporabniško izkušnjo s katerekoli lokacije in na katerikoli napravi. Ena izmed rešitev poenot...

Evoluzione dei sistemi GNSS

Directory of Open Access Journals (Sweden)

Gianluca Pititto

2010-03-01

Full Text Available Evolution of GNSS systems With this article GEOmedia is starting a review on the latest updates concerning GNSS technology. Since the first GPS satellites, the evolution of GNSS sector witnessed the grow of other constellations: GLONASS, Beidou (Compass and Galileo. The development of positioning techniques even brought to the creation of specific Augmentation Systems, capable of the enhancement of the localization signals (GBAS and SBAS. The aim of this review is to provide a general-to-particular knowledge of all the positiong and augmentation systems, from a historical point of view to real applications.

Gazi Haber Sistemi (GHS)

OpenAIRE

Şahin, Muzaffer

2015-01-01

Extended Abstract in EnglishNews production and broadcasting processes need to be taken under consideration in order to produce journalism and news writing software tools. When forming such news production software systems, complementary elements such as photographs, graphics and videos should also be included in the system that is used for news writing, editing, auditing and publishing. The function of the main structure in journalism constitutes of writing of the news, news editing, restruc...

PRIMERJAVA ERP REŠITEV MICROSOFT DYNAMICS NAV IN SAP

OpenAIRE

Kuronja, Aleš

2015-01-01

Celovite informacijske rešitve (ERP) so integrirani sistemi za podporo in upravljanje poslovanja. Podpirajo različne jezike, valute in različna področja oz. panoge, v katerih poslujejo podjetja. ERP rešitve so lahko namenjene vsem velikostim podjetja, od malih do srednje velikih podjetij in vse do velikih korporacij, saj le-ti celoviti sistemi nudijo podporo večini ali vsem poslovnim procesom, ki jih izvaja vsako podjetje. V delu diplomskega projekta smo predstavili podjetji Microsoft in S...

La qualità del servizio sportivo come strumento di miglioramento del benessere psico-fisico dell'utente

OpenAIRE

Nicolai, Renato

2009-01-01

La ricerca approfondisce le modalità  di applicazione degli standard di qualità  nell'ambito del servizio sportivo, qualità  certificata attraverso sistemi convenzionali o auto verificata attraverso strumenti quali carte di servizio. L'applicazione e verifica dei sistemi di qualità  ad un servizio, seppur non considerato pubblico ma comunque di interesse generale, deve essere messa in relazione con i risultati che il servizio stesso si prefigge sia dal punto di vista del privato (o pubbli...

Bayesian Methods and Confidence Intervals for Automatic Target Recognition of SAR Canonical Shapes

Science.gov (United States)

2014-03-27

and DirectX [22]. The CUDA platform was developed by the NVIDIA Corporation to allow programmers access to the computational capabilities of the...were used for the intense repetitive computations. Developing CUDA software requires writing code for specialized compilers provided by NVIDIA and

Accelerating Multiple Compound Comparison Using LINGO-Based Load-Balancing Strategies on Multi-GPUs.

Science.gov (United States)

Lin, Chun-Yuan; Wang, Chung-Hung; Hung, Che-Lun; Lin, Yu-Shiang

2015-01-01

Compound comparison is an important task for the computational chemistry. By the comparison results, potential inhibitors can be found and then used for the pharmacy experiments. The time complexity of a pairwise compound comparison is O(n (2)), where n is the maximal length of compounds. In general, the length of compounds is tens to hundreds, and the computation time is small. However, more and more compounds have been synthesized and extracted now, even more than tens of millions. Therefore, it still will be time-consuming when comparing with a large amount of compounds (seen as a multiple compound comparison problem, abbreviated to MCC). The intrinsic time complexity of MCC problem is O(k (2) n (2)) with k compounds of maximal length n. In this paper, we propose a GPU-based algorithm for MCC problem, called CUDA-MCC, on single- and multi-GPUs. Four LINGO-based load-balancing strategies are considered in CUDA-MCC in order to accelerate the computation speed among thread blocks on GPUs. CUDA-MCC was implemented by C+OpenMP+CUDA. CUDA-MCC achieved 45 times and 391 times faster than its CPU version on a single NVIDIA Tesla K20m GPU card and a dual-NVIDIA Tesla K20m GPU card, respectively, under the experimental results.

BİR ÇEVRİM İÇİ UZAKTAN TAKİP SİSTEMİ TASARIMI

Directory of Open Access Journals (Sweden)

Ahmet Emir DİRİK

2004-02-01

Full Text Available Bu çalışmada düşük maliyetli bir çevrim içi takip sistemi geliştirilmiştir. Takip sistemi, konum belirleme, kablosuz haberleşme ve sayısal harita modülleri olmak üzere üç ana modülden oluşmaktadır. Takip sistemlerinde konum belirleme modülü, hareketli araçların pozisyonlarının tespitinde kullanılmaktadır. Bu modül ile elde edilen pozisyon bilgisi, kablosuz haberleşme sistemi aracılığı ile takip merkezine iletilmekte, takip merkezine ulaşan pozisyon bilgisi merkezde işlenerek araç konumları sayısal harita üzerinde görüntülenmektedir. Geliştirilen sistem ile kampüs içerisinde hareket eden araçların konumları 10m civarında bir hata ile tespit edilebilmekte ve araç hareketleri takip merkezinden on-line izlenebilmektedir. Sistemde kablosuz veri haberleşmesi için analog araç telsizleri kullanılmıştır. Böylece haberleşme için uydu ya da GSM şebekelerinin kullanılmasına gerek kalmamış ve düşük maliyetli-yüksek performanslı bir çevrim içi araç takip sistemi gerçekleştirilmiştir.

Ekspertni sistem za avtomatsko analizo lastnosti taktičnega radijskega omrežja

OpenAIRE

Klampfer, Saša

2009-01-01

V širokem razcvetu računalniške industrije in pridobitve velike procesorske moči, so se v različnih industrijskih panogah močno uveljavili izpopolnjeni računalniški sistemi. Le ti so dandanes človeku v veliko pomoč, v nekaterih primerih pa z implementirano umetno inteligenco nadomeščajo človeško bitje. Med sisteme, ki so v pomoč uporabniku, operaterju, delavcu ipd. spadajo ekspertni sistemi z omejenim naborom znanja, in so namenjeni razreševanju problemov iz dobro poznane domene. Znanje za ra...

Lezioni di fisica teorica

CERN Document Server

Caldirola, Piero

Richiami di meccanica analitica ; richiami di termodinamica ; richiami di elettromagnetismo ; appunti sulla teoria della relatività ; la non validità delle teorie classiche nel mondo microscopico ; la meccanica atomica di Bohr e Sommerfeld ; I fondamenti della meccanica quantistica ; applicazioni nell'equazione di Schroedinger ; meccanica quantistica dei sistemi l'atomo di idrogeno ; particella in un campo elettrico e magnetico ; il calcolo delle perturbazioni nella teoria quantistica ; teoria dell'emissione e dell'assorbimento della luce ; sistemi di particelle identiche ; il legame chimico omopolare nella molecola di idrogeno ; la teoria di Dirac.

Grafični uporabniški vmesnik za vgrajene sisteme

OpenAIRE

MAJERLE, TILEN

2017-01-01

Grafični uporabniški vmesnik je način interakcije med uporabnikom in napravo, največkrat osebnim računalnikom. V današnjem času postajajo vgrajeni sistemi vse bolj zmogljivi, s tem pa tudi vse večje zahteve po delovanju. Pri najbolj zmogljivih napravah lahko priključimo zaslon na sistem in tako omogočimo uporabniku grafičen prikaz. Ker imajo vgrajeni sistemi precej manj spominskih kapacitet, moramo razmisliti o grafičnih knjižnicah, ki so namenjene prav takšnim sistemom. ...

Dispersions of Oxides in Oxide Matrices as High-Temperature Reactor Fuels; Dispersions d'oxyde dans des matrices d'oxyde, utilisees comme combustibles dans des reacteurs a haute temperature; Dispersiya okisej v okislovykh matritsakh v kachestve topliva dlya vysokotemperaturnogo reaktora; Empleo de dispersiones de oxidos en matrices de oxidos, como combustibles para reactores de elevada temperatura

Energy Technology Data Exchange (ETDEWEB)

Williams, J. [Atomic Energy Research Establishment, Harwell (United Kingdom)

1963-11-15

incorporarlas en matrices de elevada densidad. Los trabajos sobre metodos de elaboracion en escala experimental se hallan bastante avanzados. (author) [Russian] Daetsya obzor vozmozhnosti primeneniya dispersij PuO{sub 2},UO{sub 2}, ThO{sub 2} v matritsakh iz BeO, Al{sub 2}O{sub 3}, MgO i SiO{sub 2} s tochki zreniya sokhraneniya tselostnosti takogo topliva i sposobov ego izgotovleniya. Neizmennost' razmerov i sposobnost' uderzhaniya produktov deleniya yavlyayutsya naibolee vazhnymi svojstvami s tochki zreniya sokhraneniya tselostnosti topliva. Sovmestimost' sostavnykh ehlementov topliva drug s drugom i s teplonositelem okazyvayut vliyanie na neizmennost' razmerov, no v ehtom otnoshenii okislovye vidy topliva obladayut znachitel'nymi preimushchestvami. Na izmenenie razmerov pod dejstviem oblucheniya okazyvayut vliyanie: povrezhdeniya matritsy pod dejstviem nejtronov i oskolkov deleniya; radiatsionnoe povrezhdenie fazy delyashchikhsya veshchestv vosproizvodyashchikh materialov i nakoplenie produktov deleniya v gazoobraznom sostoyanii. Termicheskie napryazheniya takzhe mogut vyzyvat' izmeneniya formy. Odnako svedeniya o mekhanizme relaksatsii napryazhenij slishkom ogranicheny, chtoby mozhno bylo dat' kakuyu-libo priemlimuyu teoreticheskuyu otsenku povedeniyu topliva. Issledovaniya vykhoda produktov deleniya kak v sluchae legkogo oblucheniya, tak i pri sil'nom vygoranii okisej delyashchikhsya veshchestv/vosproizvodyashchikh materialov ogranichivalis' glavnym obrazom gazoobraznymi produktami deleniya, preimushchestvenno ksenonom. Dannye o vykhode drugikh produktov deleniya, a takzhe svedeniya o prokhozhdenii produktov deleniya voobshche cherez vozmozhnye materialy dlya matrits ochen' ogranicheny. Issledovaniya pronitsaemosti chistykh spekshikhsya okisej pokazyvayut, chto dlya ustraneniya otkrytoj poristosti takikh matrits potrebovalos' by dostizhenie plotnostej, dokhodyashchikh po men'shej mere do 95, a to i do 98% ot teoreticheski osushchestvimoj. Dlya izgotovleniya chastits

Accelerating Multiple Compound Comparison Using LINGO-Based Load-Balancing Strategies on Multi-GPUs

Directory of Open Access Journals (Sweden)

Chun-Yuan Lin

2015-01-01

Full Text Available Compound comparison is an important task for the computational chemistry. By the comparison results, potential inhibitors can be found and then used for the pharmacy experiments. The time complexity of a pairwise compound comparison is O(n2, where n is the maximal length of compounds. In general, the length of compounds is tens to hundreds, and the computation time is small. However, more and more compounds have been synthesized and extracted now, even more than tens of millions. Therefore, it still will be time-consuming when comparing with a large amount of compounds (seen as a multiple compound comparison problem, abbreviated to MCC. The intrinsic time complexity of MCC problem is O(k2n2 with k compounds of maximal length n. In this paper, we propose a GPU-based algorithm for MCC problem, called CUDA-MCC, on single- and multi-GPUs. Four LINGO-based load-balancing strategies are considered in CUDA-MCC in order to accelerate the computation speed among thread blocks on GPUs. CUDA-MCC was implemented by C+OpenMP+CUDA. CUDA-MCC achieved 45 times and 391 times faster than its CPU version on a single NVIDIA Tesla K20m GPU card and a dual-NVIDIA Tesla K20m GPU card, respectively, under the experimental results.

Utilizing General Purpose Graphics Processing Units to Improve Performance of Computer Modelling and Visualization

Science.gov (United States)

Monk, J.; Zhu, Y.; Koons, P. O.; Segee, B. E.

2009-12-01

With the introduction of the G8X series of cards by nVidia an architecture called CUDA was released, virtually all subsequent video cards have had CUDA support. With this new architecture nVidia provided extensions for C/C++ that create an Application Programming Interface (API) allowing code to be executed on the GPU. Since then the concept of GPGPU (general purpose graphics processing unit) has been growing, this is the concept that the GPU is very good a algebra and running things in parallel so we should take use of that power for other applications. This is highly appealing in the area of geodynamic modeling, as multiple parallel solutions of the same differential equations at different points in space leads to a large speedup in simulation speed. Another benefit of CUDA is a programmatic method of transferring large amounts of data between the computer's main memory and the dedicated GPU memory located on the video card. In addition to being able to compute and render on the video card, the CUDA framework allows for a large speedup in the situation, such as with a tiled display wall, where the rendered pixels are to be displayed in a different location than where they are rendered. A CUDA extension for VirtualGL was developed allowing for faster read back at high resolutions. This paper examines several aspects of rendering OpenGL graphics on large displays using VirtualGL and VNC. It demonstrates how performance can be significantly improved in rendering on a tiled monitor wall. We present a CUDA enhanced version of VirtualGL as well as the advantages to having multiple VNC servers. It will discuss restrictions caused by read back and blitting rates and how they are affected by different sizes of virtual displays being rendered.

Improving Software Performance in the Compute Unified Device Architecture

Directory of Open Access Journals (Sweden)

Alexandru PIRJAN

2010-01-01

Full Text Available This paper analyzes several aspects regarding the improvement of software performance for applications written in the Compute Unified Device Architecture CUDA. We address an issue of great importance when programming a CUDA application: the Graphics Processing Unit’s (GPU’s memory management through ranspose ernels. We also benchmark and evaluate the performance for progressively optimizing a transposing matrix application in CUDA. One particular interest was to research how well the optimization techniques, applied to software application written in CUDA, scale to the latest generation of general-purpose graphic processors units (GPGPU, like the Fermi architecture implemented in the GTX480 and the previous architecture implemented in GTX280. Lately, there has been a lot of interest in the literature for this type of optimization analysis, but none of the works so far (to our best knowledge tried to validate if the optimizations can apply to a GPU from the latest Fermi architecture and how well does the Fermi architecture scale to these software performance improving techniques.

GPGPU COMPUTING

Directory of Open Access Journals (Sweden)

BOGDAN OANCEA

2012-05-01

Full Text Available Since the first idea of using GPU to general purpose computing, things have evolved over the years and now there are several approaches to GPU programming. GPU computing practically began with the introduction of CUDA (Compute Unified Device Architecture by NVIDIA and Stream by AMD. These are APIs designed by the GPU vendors to be used together with the hardware that they provide. A new emerging standard, OpenCL (Open Computing Language tries to unify different GPU general computing API implementations and provides a framework for writing programs executed across heterogeneous platforms consisting of both CPUs and GPUs. OpenCL provides parallel computing using task-based and data-based parallelism. In this paper we will focus on the CUDA parallel computing architecture and programming model introduced by NVIDIA. We will present the benefits of the CUDA programming model. We will also compare the two main approaches, CUDA and AMD APP (STREAM and the new framwork, OpenCL that tries to unify the GPGPU computing models.

Strategies and methods of development of information systems; Strategie e metodi di sviluppo dei sistemi informativi aziendali

Energy Technology Data Exchange (ETDEWEB)

Moretti, M; Lucchetti, M C [Rome Univ. 3, Rome (Italy). Facolta' di Economia Federico Caffe' ; Di Marco, R A [ENEA, Funzione Centrale Informatica, Sede Centrale, Rome (Italy)

2001-07-01

Informative system is a relevant and current subject in the modern business studies. Although, in many economics books, is often marginally presented and considered by only one point of view. In this way, many students have a fragmented and incomplete knowledge of the subject, which doesn't allow using all the potentialities of this fundamental corporate resource. The thesis gives just a little contribution to find the fragment of theory dispersed in many field of business studies. The first step was exactly finding these fragments in: strategy, organization, quality, business administration, and business management. Analysed the different definitions and all the various notions to follow up with the speech, is described the impact of I.C.T. in the different business activities. The point of view adopted has been always the Informative System. Using a different approach, the thesis analysed the various business field related with the informative system. The key word of this thesis is: Change. Change is the business structures, strategy, quality, and in the qualifications required by the personal. Following this path, the thesis focuses opportunities offered by new technologies, in many companies during the definition of business strategy. In this second part is studied a business case, ENEA. ENEA is the national department for new technologies and environment. By on-site work, meetings with the personal, reading of the internal documents, and by all the studies done in the first part, are appeared some issues exploiting the Informative System. Are also considered some possible solutions to these issues, they are conform to the theory and law, and easy to realize. The research ends with tree interesting appendix, two about some ENEA's projects and one about hosting and housing. [Italian] I sistemi informativi sono un argomento sicuramente molto rilevante ed attuale. Proprio per questa caratteristica di relativa novita', molto spesso nei libri aziendali viene posto

Simulazioni geospaziali I sistemi pedestri

Directory of Open Access Journals (Sweden)

Francesco Bartoli

2008-03-01

Full Text Available Geospatial solutions: the pedestrian systems Investigating alongside Decision Support System simulation based models are centric. Even though Geographic Information Systems do not get in touch with Agent Based Models sooner, geospatial  simulations provide several enhancements in emergency evacuation scenarios. In a small scale pedestrian movement modelling which depicts crowd behaviour and gathering as well as ingress and egress situations from large venue where panic usually rises. Crowd managers can be supported in their decisions by running the same model against different conditions such as spatial constraints to take a turn for the better and avoid congestions as well crushing and trampling phenomena.

FARKLI YAPIDAKİ RADYAL MANYETİK YATAK SİSTEMLERİNİN İKİ BOYUTLU STATİK MANYETİK ANALİZİ

Directory of Open Access Journals (Sweden)

Yusuf ÖNER

2005-03-01

Full Text Available Sürtünme kayıpları, diğer dönel makinalarda olduğu gibi elektrik makinalarında da önemli bir problemdir. Ayrıca, sürtünme kayıplarının oluştuğu yataklar periyodik aralıklarla yağlanmaya ve bakıma ihtiyaç duyarlar. Bu çalışmada, elektrik motorunun sürtünme kayıplarını azaltmak için, farklı yapıya sahip radyal manyetik yatak sistemlerinin iki boyutlu statik manyetik analizi yapılmış ve birbirleri ile karşılaştırılmıştır; ayrıca, dört kutba sahip manyetik yatak sistemi gerçeklenmiş ve bir asenkron motora uygulanmıştır. Simülasyonlarda, tasarlanan manyetik yatak sistemi tarafından asenkron motorun rotoruna uygulanan kuvvetler, FEMM yazılım paketi kullanan bir bilgisayar yardımıyla hesaplanmıştır. Uygulamada, manyetik yatak sistemi ile mekanik yatak sistemi 350 d/d'lık hızlara kadar karşılaştırıldığında; manyetik yataklı sistemin, asenkron motorun yüksüz çalışma kayıplarını % 15 dolaylarında azalttığı gözlenmiştir. Buna ek olarak, motorun mekanik gürültüsü de önemli derecede azalmıştır.

Development of GPU Based Parallel Computing Module for Solving Pressure Equation in the CUPID Component Thermo-Fluid Analysis Code

International Nuclear Information System (INIS)

Lee, Jin Pyo; Joo, Han Gyu

2010-01-01

In the thermo-fluid analysis code named CUPID, the linear system of pressure equations must be solved in each iteration step. The time for repeatedly solving the linear system can be quite significant because large sparse matrices of Rank more than 50,000 are involved and the diagonal dominance of the system is hardly hold. Therefore parallelization of the linear system solver is essential to reduce the computing time. Meanwhile, Graphics Processing Units (GPU) have been developed as highly parallel, multi-core processors for the global demand of high quality 3D graphics. If a suitable interface is provided, parallelization using GPU can be available to engineering computing. NVIDIA provides a Software Development Kit(SDK) named CUDA(Compute Unified Device Architecture) to code developers so that they can manage GPUs for parallelization using the C language. In this research, we implement parallel routines for the linear system solver using CUDA, and examine the performance of the parallelization. In the next section, we will describe the method of CUDA parallelization for the CUPID code, and then the performance of the CUDA parallelization will be discussed

Low-Level {beta} and {gamma} Counting in the Region 0-10 Disintegrations Per Minute; Comptage {beta} et {gamma} d'echantillons de faible activite (0 a 10 desintegrations par minute); Izmerenie {beta}- i {gamma}-izlucheniya maloj moshchnosti (0-10 raspadov v minutu); Recuento {beta} y {gamma} de muestras de baja actividad (0 a 10 desintegraciones por minuto)

Energy Technology Data Exchange (ETDEWEB)

Manov, George G [Tracerlab Inc. (United States)

1960-06-15

(antisovpadenij) dlya umen'sheniya fona. Izmereniya proizvodilis' s pomoshch'yu sleduyushchikh tipov schetchikov: a) toptsevym, b) tsilindricheskim, s) stsitillyatsionnym 4 {pi}. V dokumente udelyaetsya nekotoroe vnimanie trudnostyam polucheniya svobodnogo ot aktivnosti materiala, ispol'zuemogo dlya proizvodstva schetchikov. V nem privodyatsya dannye o materialakh s razlichnym soderzhaniem aktivnosti, kotorye mozhno svobodno priobresti. Nakoplenie takikh materialov, poluchennykh preimushchestvenn o eshche do vtoroj mirovoj vojny, bystro prevrashchaetsya v neobkhodimost'. Nadezhnost' ehlektronnoj sistemy yavlyaetsya neobkhodimoj dlya izmerenij izlucheniya maloj moshchnosti, v chastnosti, dlya togo, chtoby isklyuchit' podschet pobochnykh impul'sov. V dokumente daetsya opisanie sistemy, v kotoroj redkie impul'sy, posle izmereniya ikh skorosti, napravlyayutsya v ehlektronnuyu tsep', prokhodyat cherez usilitel' i vyvodyatsya cherez osnovnoj vykhodnoj kanal schetnogo mekhanizma. V osnovnom tranzistornaya skhema, vklyuchayushchaya predvaritel'noe usilenie i (ehlektro)pitanie , yavlyaetsya bolee udovletvoritel'noj, chem skhema, ispol'zuyushchaya vakuumnuyu lampu. (author)

Eğitim Fakültesi Öğrencilerinin Bilgisayar Destekli Uzaktan Eğitim Sistemi (Moodle Memnuniyet Düzeyleri. Education Faculty Students’ Levels of Satisfaction with the Computer-Assisted Distance Education System (Moodle

Directory of Open Access Journals (Sweden)

Murat YALMAN

2013-09-01

Full Text Available Due to the use and spread of distance education as aneducational platform at universities, which integrates technology intoeducation, it is now necessary to investigate students’ perceptions ofthis system. Students’ views about Moodle (Modular-Object-Oriented-Dynamic-Learning-Environment, a distance education system used toteach the courses to students which are found in their curriculaeducation programs, influence their achievements in the courses theyhave taken with this system. The research sample of this studyincluded 1050 students attending an Education Faculty in theacademic years of 2011-2012 and 2012-2013. As a result of this study,the Cronbach Alpha reliability coefficients for the students’ levels ofsatisfaction with distance education were calculated as 0,94. It wasfound out that following their education given with the distanceeducation management system, the majority of the students (76,57%would prefer face-to-face education even if they had the opportunity totake distance education. In addition, 58,29% of the students preferredto take the courses in their department both via face-to-face educationand via the distance education system (as a blended education system .With respect to the variable of gender, no significant difference wasfound between the students’ levels of satisfaction with distanceeducation, yet there was a significant difference at the significance levelof p Eğitimi teknolojiyle birleştiren uzaktan eğitimin, üniversitelerde eğitim platformu olarak kullanılmaya başlanması ve yaygınlaşması bu sistemin öğrenciler tarafından nasıl kabul gördüğünün bilinmesini zorunlu hale getirmiştir. Öğrencilerin eğitim müfredatlarında geçen derslerin verilmesi için kullanılan uzaktan eğitim sistemi Moodle (Modular-Object-Oriented-Dynamic-Learning-Environment konusundaki düşünceleri, bu yöntemle aldıkları derslerdeki başarılarını etkilediği düşünülmektedir. Bu araştırmanın �

RAJA Performance Suite

Energy Technology Data Exchange (ETDEWEB)

2017-09-01

The RAJA Performance Suite is designed to evaluate performance of the RAJA performance portability library on a wide variety of important high performance computing (HPC) algorithmic lulmels. These kernels assess compiler optimizations and various parallel programming model backends accessible through RAJA, such as OpenMP, CUDA, etc. The Initial version of the suite contains 25 computational kernels, each of which appears in 6 variants: Baseline SequcntiaJ, RAJA SequentiaJ, Baseline OpenMP, RAJA OpenMP, Baseline CUDA, RAJA CUDA. All variants of each kernel perform essentially the same mathematical operations and the loop body code for each kernel is identical across all variants. There are a few kernels, such as those that contain reduction operations, that require CUDA-specific coding for their CUDA variants. ActuaJ computer instructions executed and how they run in parallel differs depending on the parallel programming model backend used and which optimizations are perfonned by the compiler used to build the Perfonnance Suite executable. The Suite will be used primarily by RAJA developers to perform regular assessments of RAJA performance across a range of hardware platforms and compilers as RAJA features are being developed. It will also be used by LLNL hardware and software vendor panners for new defining requirements for future computing platform procurements and acceptance testing. In particular, the RAJA Performance Suite will be used for compiler acceptance testing of the upcoming CORAUSierra machine {initial LLNL delivery expected in late-2017/early 2018) and the CORAL-2 procurement. The Suite will aJso be used to generate concise source code reproducers of compiler and runtime issues we uncover so that we may provide them to relevant vendors to be fixed.

Strategies and methods of development of information systems; Strategie e metodi di sviluppo dei sistemi informativi aziendali

Energy Technology Data Exchange (ETDEWEB)

Moretti, M.; Lucchetti, M.C. [Rome Univ. 3, Rome (Italy). Facolta' di Economia Federico Caffe' ; Di Marco, R.A. [ENEA, Funzione Centrale Informatica, Sede Centrale, Rome (Italy)

2001-07-01

Informative system is a relevant and current subject in the modern business studies. Although, in many economics books, is often marginally presented and considered by only one point of view. In this way, many students have a fragmented and incomplete knowledge of the subject, which doesn't allow using all the potentialities of this fundamental corporate resource. The thesis gives just a little contribution to find the fragment of theory dispersed in many field of business studies. The first step was exactly finding these fragments in: strategy, organization, quality, business administration, and business management. Analysed the different definitions and all the various notions to follow up with the speech, is described the impact of I.C.T. in the different business activities. The point of view adopted has been always the Informative System. Using a different approach, the thesis analysed the various business field related with the informative system. The key word of this thesis is: Change. Change is the business structures, strategy, quality, and in the qualifications required by the personal. Following this path, the thesis focuses opportunities offered by new technologies, in many companies during the definition of business strategy. In this second part is studied a business case, ENEA. ENEA is the national department for new technologies and environment. By on-site work, meetings with the personal, reading of the internal documents, and by all the studies done in the first part, are appeared some issues exploiting the Informative System. Are also considered some possible solutions to these issues, they are conform to the theory and law, and easy to realize. The research ends with tree interesting appendix, two about some ENEA's projects and one about hosting and housing. [Italian] I sistemi informativi sono un argomento sicuramente molto rilevante ed attuale. Proprio per questa caratteristica di relativa novita', molto spesso nei libri

Un modello di catasto esportabile a 360°

Directory of Open Access Journals (Sweden)

Iniel Spa Iniel Spa

2006-06-01

Full Text Available Un sistema GIS o un sistema catastale si compone di molteplici fattori come tecnologie, dati, progetti, sistemi e risorse umane. Nello stesso modo i sistemi complessi funzionano se tutto l’insieme funziona, ma le tecnologie e il fattore umano sono alla base della riuscita di ogni progetto. In questo articolo viene presentato il sistema sviluppato da Insiel Spa. Il nuovo sistema sviluppato da Insiel su piattaforma Intergraph Geomedia Web Map per la gestione integrata dei dati amministrativi, cartografici e catastali negli Enti Locali è basato sui concetti di interoperabilità web e di cooperazione applicativa.

ETANOL + 1-NONANOL İKİLİ SİSTEMİ VE ETANOL + 1-NONANOL + SU ÜÇLÜ SİSTEMİNİN 293.15 K SICAKLIKTAKİ YOĞUNLUKLARININ, REFRAKTİF İNDİSLERİN ÖLÇÜLMESİ VE AŞIRI MOLAR HACİMLERİNİN VE MOLAR REFRAKSİYONLARININ HESAPLANMASI

OpenAIRE

MAHRAMANLIOĞLU, Mehmet; KIRBAŞLAR, Ş. İsmail

2000-01-01

Etanol+1-nonanol ikili sistemi ve etanol+1-nonanol+su üçlü sistemi için çeşitli karışımlarda yoğunluklar ve kırılma indisleri 293.15 K de ölçülmüştür. İkili ve üçlü sistemler için aşırı molar hacim ve molar refraksiyon sapmaları hesaplanmıştır. Aşırı molar hacim ve molar refraksiyon sapmaları için Redlich–Kister eşitliği uygulanarak eşitlik katsayıları hesaplanmıştır.

Copolymerization of Ethylene Induced by Cobalt-60 Gamma Radiation; Copolymerisation de l'ethylene induite par des rayons gamma du cobalt-60; Sopolimerizatsiya ehtilena pod dejstviem gamma-izlucheniya ot istochnika ks'yali-60; Copolimerizacion del etileno inducida por las radiaciones gamma del cobalto-60

Energy Technology Data Exchange (ETDEWEB)

Steinberg, M.; Colombo, P. [Brookhaven National Laboratory, Long Island, NY (United States)

1963-11-15

fraccionada. La identificacion se efectuo por espectroscopia infrarroja y la composicion se determino por analisis elemental. Para algunos de los productos de reaccion, los autores indican los puntos de fusion cristalinos, las densidades, las caracteristicas de solubilidad y los pesos moleculares. Obtuvieron pruebas de la copolimerizacion del etileno con cada uno de los siguientes monomeros: estireno, metacrilato de metilo, acetato de vinilo, acrilonitrilo, acetato de alilo, isobuteno, clorotrifluoretileno, trans 2-buteno, acrilato de metilo, isopreno, propeno, cloruro de vinilo, 1-buteno, cis 2-buteno, oxido de carbono, vinilpirrolidona, metilvinilcetona y divinilbenceno. Comprobaron que los datos experimentales obtenidos en el estudio del sistema etileno-oxido de carbono responden a una forma lineal de la ecuacion de composicion del copolimero. Encontraron el valor 22,0 para la razon ({alpha}) de las constantes de velocidad especificas correspondientes al oxido de carbono y al etileno, respectivamente, lo que indica que en calidad de monomero el oxido de carbono se activa en tal medida que se fija al extremo de una cadena de radical etilenico libre con una velocidad 22 veces mayor que un monomero etilenico. (author) [Russian] Byla izuchen vyzvannaya gamma-izlucheniem sopolimerizatsiya ehtilena s ryadom razlichnykh monomerov pri temperature 20{sup o}C i pri nachal'nykh davleniyakh do 680 atm. Ehksperimenty provodilis' staticheski v dvukhfaznykh sistemakh, za isklyucheniem sistemy ehtilen-okis' ugleroda. Razdelenie sopolimerov proizvodilos' metodami ehkstraktsii rastvoritelem i fraktsionirovannogo osazhdeniya. Dlya identifikatsii ispol'zovali infrakrasnuyu spektroskopiyu, a dlya opredeleniya sostava - ehlementarnyj analiz. Privedeny kharakte- ristiki nekotorykh produktov reaktsii, vklyuchayushchie ikh temperaturu plavleniya, plotnost', rastvorimost' i molekulyarnyj ves. Ustanovlena sopolimerizatsiya ehtilena s kazhdym iz sleduyushchikh monomerov: stirolom, metilmetakrilatom

I sistemi a fune come attrattori per la valorizzazione del territorio Rope Transport Systems as Elements for Urban and Regional Development

Directory of Open Access Journals (Sweden)

Alberto Simeone

2010-11-01

Full Text Available L’articolo propone un approfondimento sul tema della mobilità turistica. Partendo da recenti esperienze progettuali realizzate e da realizzare, il contributo analizza in ambiti turistici differenti tra loro il ruolo dei sistemi di trasporto a fune. Essi risultano di particolare interesse perché svolgono spesso il duplice ruolo di elementi della offerta di trasporto per la mobilità sistematica e rappresentano in sé attrattive turistiche, specie se pensate secondo criteri di qualità architettonica e di sostenibilità ambientale.Accessibility and mobility have an important role in urban and regional development strategies, in a particular way for the touristic uses of territories. Transport infrastructures constitute in fact necessary elements for the use of urban areas, but assume an extra function related to the valorization of the territory. Furthermore structures for mobility are a component of the touristic supply system especially the rope transport structures that offer dynamic and unique point of views. Cable ways in urban area have this characteristic more than other rope transport systems. Starting from this assume, the article describes four projects developed in the last years in Campania Region and a transport system carry out in Perugia. The five study cases demonstrate how an increasing attention rope transport technology is diffusing in different contest especially for tourism uses. The first case is the Giffoni Valle Piana inclined lift that should connect the city centre in the valley with the medieval Castle. This project is strictly related to a general touristic strategy of the whole municipality. The second project regards the Ravello-Minori cable way and the objective to offer a sustainable alternative to the private car for travelling around two of the most beautiful areas in the Amalfi coast. The third project is located in the centre of the city of Naples and regards a cable way for the connection between the

Termodinamica

CERN Document Server

Fermi, Enrico

1972-01-01

Sistemi termodinamica ; il primo principio della termodinamica ; il secondo principio della termodinamica ; l'entropia ; i potenziali termodinamici ; reazioni gassose ; termodinamica delle soluzioni diluite ; la costante dell'entropia.

Visual Media Reasoning - Terrain-based Geolocation

Science.gov (United States)

2015-06-01

the drawings, specifications, or other data does not license the holder or any other person or corporation ; or convey any rights or permission to...3.4 Alternative Metric Investigation This section describes a graphics processor unit (GPU) based implementation in the NVIDIA CUDA programming...utilizing 2 concurrent CPU cores, each controlling a single Nvidia C2075 Tesla Fermi CUDA card. Figure 22 shows a comparison of the CPU and the GPU powered

Preliminary experiments with a solid-state ionization chamber; Experiences preliminaires au moyen d'une chambre d'ionisation a milieu solide; Predvaritel'nye opyty s tverdoj ionizatsionnoj kameroj; Experimentos preliminares con una camara de ionizacion en estado solido

Energy Technology Data Exchange (ETDEWEB)

Griffiths, R J; Batty, C J [National Institute for Research and Nuclear Science, Harwell (United Kingdom); Gibbons, P E; Northrop, D C [Service' s Electronics Research Laboratory, Baldock, Didcot (United Kingdom)

1962-04-15

A solid-state ionization chamber has been made by diffusing phosphorus into high-resistivity silicon to form ohmic contacts. Such a detector has been successfully used to detect 30-MeV protons. Preliminary results are given and discussed. (author) [French] Une chambre d'ionisation a milieu solide a ete realisee par diffusion de phosphore dans du silicium de haute resistivite pour former des contacts ohmiques. Un detecteur de cette nature a ete utilise avec succes pour detecter des protons de 30 MeV. Les auteurs presentent les resultats preliminaires obtenus. (author) [Spanish] Se ha construido una camara de ionizacion en estado solido, por difusion de fosforo en silicio de elevada resistividad para formar contactos ohmicos. Con esta camara se han logrado detectar protones de 30 MeV. Los autores presentan y examinan los resultados preliminares obtenidos. (author) [Russian] Tverdaya ionizatsionnaya kamera izgotovlena putem vklyucheniya fosfora v kremnij s vysokoj udel'noj soprotivlyaemost'yu dlya obrazovaniya omicheskikh kontaktov. Takoj detektor uspeshno primenyaetsya dlya obnaruzheniya protonov v 30 mehv. Predstavleny i obsuzhdayutsya predvaritel'nye rezul'taty. (author)

Forward and adjoint spectral-element simulations of seismic wave propagation using hardware accelerators

Science.gov (United States)

Peter, Daniel; Videau, Brice; Pouget, Kevin; Komatitsch, Dimitri

2015-04-01

Improving the resolution of tomographic images is crucial to answer important questions on the nature of Earth's subsurface structure and internal processes. Seismic tomography is the most prominent approach where seismic signals from ground-motion records are used to infer physical properties of internal structures such as compressional- and shear-wave speeds, anisotropy and attenuation. Recent advances in regional- and global-scale seismic inversions move towards full-waveform inversions which require accurate simulations of seismic wave propagation in complex 3D media, providing access to the full 3D seismic wavefields. However, these numerical simulations are computationally very expensive and need high-performance computing (HPC) facilities for further improving the current state of knowledge. During recent years, many-core architectures such as graphics processing units (GPUs) have been added to available large HPC systems. Such GPU-accelerated computing together with advances in multi-core central processing units (CPUs) can greatly accelerate scientific applications. There are mainly two possible choices of language support for GPU cards, the CUDA programming environment and OpenCL language standard. CUDA software development targets NVIDIA graphic cards while OpenCL was adopted mainly by AMD graphic cards. In order to employ such hardware accelerators for seismic wave propagation simulations, we incorporated a code generation tool BOAST into an existing spectral-element code package SPECFEM3D_GLOBE. This allows us to use meta-programming of computational kernels and generate optimized source code for both CUDA and OpenCL languages, running simulations on either CUDA or OpenCL hardware accelerators. We show here applications of forward and adjoint seismic wave propagation on CUDA/OpenCL GPUs, validating results and comparing performances for different simulations and hardware usages.

Improved method for lifetime measurements; Methode perfectionnee de mesure de la duree de vie; Usovershenstvovannyj metod izmereniya vremeni zhizni; Metodo perfeccionado para medir la vida media de los estados de excitacion

Energy Technology Data Exchange (ETDEWEB)

Weinzierl, P; Bartl, W [Oesterreichische Studiengesellschaft fuer Atomenergie, Seibersdorf (Austria)

1962-04-15

entre los dos detectores. El espectro de impulsos del dispositivo sumador se hace incidir sobre un analizador de un solo canal para la seleccion de la energia deseada. El rayo {gamma} (I) se detecta en otro cristal organico. Los impulsos rapidos de ambos detectores organicos pasan a un convertidor tiempo-altura de impulsos y a un analizador multicanal. Este analizador se hace actuar como puerta mediante una coincidencia lenta entre los discriminadores de alturas de impulsos. (author) [Russian] Izmerenie vremeni zhizni yadra v vozbuzhdennom sostoyanii obychno osnovano na izmerenii otstavaniya odnogo gamma-lucha (II) po otnosheniyu k drugomu gamma-luchu (I) ili k beta-chastitse. Organicheskie stsintillyatory dayut nailuchshuyu razreshayushchuyu sposobnost' po vremeni dlya izmereniya vremeni takogo raspada, no dlya slozhnykh protsessov raspada opredelenie gamma-ehnergii predstavlyaet bol'shoe znachenie i mozhet byt' luchshe vsego dostignuto stsintillyatorami s kristallom NaI(Tl). Dlya sovmestnogo ispol'zovaniya preimushchestv detektorov togo i drugogo tipa gamma-luch (II) prezhde vsego rasseivaetsya v organicheskom kristalle (stil'ben), a rasseyannyj kvant detektiruetsya kristallom Nal(Tl). Dlya osushchestvleniya bol'shikh uglov priemki mezhdu dvumya stsintillyatorami izmerenie gamma-ehnergii dostigaetsya posle slozheniya amplitudy oboikh stsintillyatsionnykh impul'sov. Dlya obespecheniya nadezhnogo dejstviya ustanovki dlya slozheniya postupayushchie iz organicheskogo kristalla impul'sy prokhodyat prezhde vsego cherez strobiruyushchuyu skhemu, kotoraya initsiiruetsya sovpadeniem mezhdu dvumya stsintillyatorami. Spektr impul'sov, postupayushchij iz ustanovki dlya slozheniya, napravlyaetsya v odnokanal'nyj analizator dlya otbora po ehnergii. Gamma-luch (I) detektiruetsya v drugom organicheskom kristalle. Bystrye impul'sy oboikh organicheskikh stsintillyatorov napravlyayutsya v amplitudno-vremennoj preobrazovatel' impul'sov i v mnogokanal'nyj analizator. EHtot analizator

A GPU-Based Genetic Algorithm for the P-Median Problem

OpenAIRE

AlBdaiwi, Bader F.; AboElFotoh, Hosam M. F.

2016-01-01

The p-median problem is a well-known NP-hard problem. Many heuristics have been proposed in the literature for this problem. In this paper, we exploit a GPGPU parallel computing platform to present a new genetic algorithm implemented in Cuda and based on a Pseudo Boolean formulation of the p-median problem. We have tested the effectiveness of our algorithm using a Tesla K40 (2880 Cuda cores) on 290 different benchmark instances obtained from OR-Library, discrete location problems benchmark li...

Surinder S. Jodhka*, Caste / Kast Sistemi

OpenAIRE

Altıntaş, İhsan

2016-01-01

Bu kitap kast sisteminin daha iyi anlaşılmasında önemli bir role sahiptir. Yazar kast sitemini anlaşılır kılmak temel sorular ile başlar. Neden kast sisteminden bahsetmeliyiz? Yirmi birinci yüzyılda kast sisteminden nasıl bahsedilir? Bu sorular detaylı cevaplar ile donatılmaktadır. Kast sisteminin günümüzdeki gerçekliğinin kabul edilmesini vurgulayarak bu gerçeklikleri şöyle sıralamaktadır; gelenek-görenek, adetler, din ve özellikle eşitsizlik.

Accelerating Smith-Waterman Alignment for Protein Database Search Using Frequency Distance Filtration Scheme Based on CPU-GPU Collaborative System

Directory of Open Access Journals (Sweden)

Yu Liu

2015-01-01

Full Text Available The Smith-Waterman (SW algorithm has been widely utilized for searching biological sequence databases in bioinformatics. Recently, several works have adopted the graphic card with Graphic Processing Units (GPUs and their associated CUDA model to enhance the performance of SW computations. However, these works mainly focused on the protein database search by using the intertask parallelization technique, and only using the GPU capability to do the SW computations one by one. Hence, in this paper, we will propose an efficient SW alignment method, called CUDA-SWfr, for the protein database search by using the intratask parallelization technique based on a CPU-GPU collaborative system. Before doing the SW computations on GPU, a procedure is applied on CPU by using the frequency distance filtration scheme (FDFS to eliminate the unnecessary alignments. The experimental results indicate that CUDA-SWfr runs 9.6 times and 96 times faster than the CPU-based SW method without and with FDFS, respectively.

Accelerating Smith-Waterman Alignment for Protein Database Search Using Frequency Distance Filtration Scheme Based on CPU-GPU Collaborative System.

Science.gov (United States)

Liu, Yu; Hong, Yang; Lin, Chun-Yuan; Hung, Che-Lun

2015-01-01

The Smith-Waterman (SW) algorithm has been widely utilized for searching biological sequence databases in bioinformatics. Recently, several works have adopted the graphic card with Graphic Processing Units (GPUs) and their associated CUDA model to enhance the performance of SW computations. However, these works mainly focused on the protein database search by using the intertask parallelization technique, and only using the GPU capability to do the SW computations one by one. Hence, in this paper, we will propose an efficient SW alignment method, called CUDA-SWfr, for the protein database search by using the intratask parallelization technique based on a CPU-GPU collaborative system. Before doing the SW computations on GPU, a procedure is applied on CPU by using the frequency distance filtration scheme (FDFS) to eliminate the unnecessary alignments. The experimental results indicate that CUDA-SWfr runs 9.6 times and 96 times faster than the CPU-based SW method without and with FDFS, respectively.

Programming massively parallel processors a hands-on approach

CERN Document Server

Kirk, David B

2010-01-01

Programming Massively Parallel Processors discusses basic concepts about parallel programming and GPU architecture. ""Massively parallel"" refers to the use of a large number of processors to perform a set of computations in a coordinated parallel way. The book details various techniques for constructing parallel programs. It also discusses the development process, performance level, floating-point format, parallel patterns, and dynamic parallelism. The book serves as a teaching guide where parallel programming is the main topic of the course. It builds on the basics of C programming for CUDA, a parallel programming environment that is supported on NVI- DIA GPUs. Composed of 12 chapters, the book begins with basic information about the GPU as a parallel computer source. It also explains the main concepts of CUDA, data parallelism, and the importance of memory access efficiency using CUDA. The target audience of the book is graduate and undergraduate students from all science and engineering disciplines who ...

Optimizing memory-bound SYMV kernel on GPU hardware accelerators

KAUST Repository

Abdelfattah, Ahmad

2013-01-01

Hardware accelerators are becoming ubiquitous high performance scientific computing. They are capable of delivering an unprecedented level of concurrent execution contexts. High-level programming language extensions (e.g., CUDA), profiling tools (e.g., PAPI-CUDA, CUDA Profiler) are paramount to improve productivity, while effectively exploiting the underlying hardware. We present an optimized numerical kernel for computing the symmetric matrix-vector product on nVidia Fermi GPUs. Due to its inherent memory-bound nature, this kernel is very critical in the tridiagonalization of a symmetric dense matrix, which is a preprocessing step to calculate the eigenpairs. Using a novel design to address the irregular memory accesses by hiding latency and increasing bandwidth, our preliminary asymptotic results show 3.5x and 2.5x fold speedups over the similar CUBLAS 4.0 kernel, and 7-8% and 30% fold improvement over the Matrix Algebra on GPU and Multicore Architectures (MAGMA) library in single and double precision arithmetics, respectively. © 2013 Springer-Verlag.

Optimization Solutions for Improving the Performance of the Parallel Reduction Algorithm Using Graphics Processing Units

Directory of Open Access Journals (Sweden)

Ion LUNGU

2012-01-01

Full Text Available In this paper, we research, analyze and develop optimization solutions for the parallel reduction function using graphics processing units (GPUs that implement the Compute Unified Device Architecture (CUDA, a modern and novel approach for improving the software performance of data processing applications and algorithms. Many of these applications and algorithms make use of the reduction function in their computational steps. After having designed the function and its algorithmic steps in CUDA, we have progressively developed and implemented optimization solutions for the reduction function. In order to confirm, test and evaluate the solutions' efficiency, we have developed a custom tailored benchmark suite. We have analyzed the obtained experimental results regarding: the comparison of the execution time and bandwidth when using graphic processing units covering the main CUDA architectures (Tesla GT200, Fermi GF100, Kepler GK104 and a central processing unit; the data type influence; the binary operator's influence.

General purpose graphic processing unit implementation of adaptive pulse compression algorithms

Science.gov (United States)

Cai, Jingxiao; Zhang, Yan

2017-07-01

This study introduces a practical approach to implement real-time signal processing algorithms for general surveillance radar based on NVIDIA graphical processing units (GPUs). The pulse compression algorithms are implemented using compute unified device architecture (CUDA) libraries such as CUDA basic linear algebra subroutines and CUDA fast Fourier transform library, which are adopted from open source libraries and optimized for the NVIDIA GPUs. For more advanced, adaptive processing algorithms such as adaptive pulse compression, customized kernel optimization is needed and investigated. A statistical optimization approach is developed for this purpose without needing much knowledge of the physical configurations of the kernels. It was found that the kernel optimization approach can significantly improve the performance. Benchmark performance is compared with the CPU performance in terms of processing accelerations. The proposed implementation framework can be used in various radar systems including ground-based phased array radar, airborne sense and avoid radar, and aerospace surveillance radar.

Photoscanning; Photo-exploration; Fotoissledovanie; Fotoexploracion

Energy Technology Data Exchange (ETDEWEB)

Bender, M A; Blau, M [Department of Radioisotope Research, Roswell Park Memorial Institute, Buffalo, NY (United States)

1959-07-01

contraste necesario para poder observar pequenos cambios en el indice de recuento. Existe la posibilidad de graduar el contraste y la ganancia del sistema de registro con arreglo a las necesidades clinicas. Un colimador de enfoque y un cristal de yoduro sodico de gran tamano proporcionan una elevada eficiencia, una resolucion satisfactoria y una sensibilidad adecuada en profundidad. Este instrumenta se ha utilizado con exito para la deteccion de tumores humanos en el cerebro, el higado y la tiroides. (author) [Russian] Issledovanie metodom izotopov pozvolyaet bez nane geniya travmy ustanavlivat' mestonakhozhdenie nekotorykh vidov opukholej v organizme cheloveka. Dlya polucheniya udovletvoritel'nogo graficheskogo izobrazheniya detektor dolzhen byt' v sostoyanii opredelyat' nebol'shie razlichiya mezhdu soderzhanii izotopov v zatronutoj i okruzhayushchej tkani, a takzhe registrirovat' ehti dannye v legko ponyatnoj forme. Krome togo, on dolzhen byt' dostatochno chuvstvitel'nym, chtoby mozhno bylo ego prisposoblyat' k razlichnym vstrechayushchimsya na praktike urovnyam radioaktivnosti i sushchestvuyushchim sootnosheniyam mezhdu bol'noj i okruzhayushchej tkan'yu. Tak kak izsledovanie s pomoshch'yu radioizotopov yavlyaetsya v osnovnom registratsionny m metodom diagnoza, obshchij koehffitsient ehffektivnosti schetchika dolzhen byt' dostatochno vysokim, chtoby vvodimaya radioaktivnost' ne prevyshala po vozmozhnosti minimal'nogo urovnya. Dlya ehtoj tseli byl skonstruirovan sootvetstvuyushchi j detektor. Sistema zapisi, osnovannaya na tom, chto napryazhenie v znachitel'noj mere otrazhaetsya na intensivnosti sveta, proizvodimogo vol'framovoj nit'yu, obespechivaet tot vysokij kontrast, kotoryj neobkhodim dlya ustanovleniya malejshikh izmenenij v skorosti scheta. EHtot kontrast i moshchnost' zapisyvayushchej sistemy mozhno regulirovat' i ehtim udovletvoryat' klinicheskim trebovaniyam. Fokusiruyushchi j kollimator i bol'shoj kristall iodistogo natriya (Nal) obespechivayut vysokuyu

Green economy: un'occasione per le aree montane

Directory of Open Access Journals (Sweden)

Maria Sapone

2013-06-01

Full Text Available È ormai opinione largamente condivisa che l’attuale “crisi” dell’organismo territoriale non sia soltanto economica ma anche ambientale. Quest’ultima tematica unita a quella della green economy potrebbero rappresentare l'occasione di intervenire sui sistemi territoriali non urbani, un tempo vitali per l’economia locale, ed oggi abbandonati a se stessi a favore delle aree urbanizzate, luoghi economicamente più vantaggiosi. Partendo dalle indicazioni del Programma per l’Ambiente delle Nazioni Unite (UNEP si potrebbero definire politiche di sviluppo al fine di migliorare la competitività e l'attrattività dei sistemi territoriali rurali attraverso la valorizzazione delle risorse endogene presenti su tali territori, con l’obiettivo di favorire lo sviluppo ecosostenibile delle diverse attività al fine di creare una rete integrata. La ricerca svolta presenta le diverse dinamiche legate alla creazione di una rete di Eco-Villaggi, con lo scopo di rifunzionalizzare il patrimonio edilizio e urbanistico esistente, migliorando, così, la qualità della vita dei centri montani. Questo modello può rappresentare concretamente una delle possibili soluzioni allo spopolamento, nel conservare e tutelare lo spazio naturale attraverso la promozione della green economy, basata sull’utilizzo di sistemi di produzione sostenibili, nel rispetto dei requisiti ambientali, nell’attivazione di sistemi energetici rinnovabili e nel richiamo turistico del patrimonio storico-culturale della montagna. Infatti queste risorse se gestite nel modo corretto, attraverso una attenta pianificazione territoriale, potrebbero rappresentare il volano per un modello di sviluppo sostenibile e allo stesso tempo potrebbero avviare una riqualificazione e valorizzazione dei borghi rurali, che spesso ospitano un patrimonio architettonico di notevole pregio. Risulta necessario, per i contesti rurali, porre in atto strumenti, modalità e forme innovative d’intervento capaci

Operating Experience with Indian Point Nuclear Electric Generating Station; Experience d'exploitation de la centrale nucleaire d'Indian point; Opyt ehkspluatatsii Indian-pojntskoj yadernoj ehlektrostantsii; Experiencia adquirida con la explotacion de la central nucleoelectrica de Indian point

Energy Technology Data Exchange (ETDEWEB)

Beattie, W. C.; Freyberg, R. H. [Consolidated Edison Company of New York, Inc., New York, NY (United States)

1963-10-15

'yu 275 tys. kvt. Toplivom v reaktore sluzhit smes' polnost'yu obogashchennoj okisi U{sup 235} i okisi Th{sup 232}. Stantsiya raspolozhena na reke Gudzon, primerno v 24 milyakh severnee N'yu-Jorka. V svyazi s takoj blizost'yu ot N'yu-Jorka v proekte stantsii byli predusmotreny dopolnitel'nye predokhranitel'nye ustrojstva dlya predotvrashcheniya otkloneniya reaktivnosti i radiatsionnykh ehffektov takogo otkloneniya. Stroitel'stvo zakoncheno v mae 1962 goda. Zagruzka topliva osushchestvlena v iyune, a 2 avgusta 1962 goda reaktor vpervye dostig kritichnosti. V techenie avgusta privodilis' ispytaniya ka maloj moshchnosti do 5 mgvt pri temperature okrukhaitsej sredy i povyshennoj temperature. 16 sentyabrya 1962 goda turbogenerator byl vpervye fazirovan s sistemoj Konsolidejtid Ehdison. Ispytanie reaktora na moshchnostyakh do 50% provodilos' do noyabrya i preryvalos' chastymi avtomaticheskimiostanovkami, bol'shaya chast' kotorykh byla vyzvana nepoladkami v neyadernoj chasti stantsii. Nepoladki v sisteme upravleniya privodov reguliruyushchikh sterzhnej byli samymi ser'eznymi pomekhami so storony yadernoj chasti stantsii dlya raboty s avtomaticheskim vvedeniem reguliruyushchikh sterzhnej i prichinoj zaderzhek s puskom reaktora posle avtomaticheskikh ostanovok. 14 noyabrya 1962 goda stantsiya byla ostanovlena dlya planovoj zameny truboprovodov v neyadernoj chasti stantsii i modifikatsij i dopolneniya sistemy provodov reguliruyushchikh sterzhnej. Poslednee vklyuchalo ustanovku sistemy ochistki sukhogo azota dlya kozhukhov privodov reguliruyushchikh sterzhnej, prednaznachennykh dlya svedeniya k minimumu ehffektov vody, prosachivayushchejsya cherez uplotneniya v kozhukhi reguliruyushchikh sterzhnej. Okazalos', chto ehto yavlyaetsya osnovnoj prichinoj nepravil'nykh pokazanij sistemy upravleniya reaktorom. Blok byl vnov' pushchen 1 yanvarya 1963 goda. Ispytanie reaktora na moshchnostyakh do 100% v usloviyakh stabil'noj nagruzki bylo zakoncheno 27 yanvarya 1963 goda. Rezul

Gfargo: Fargo for Gpu

Science.gov (United States)

Masset, Frédéric

2015-09-01

GFARGO is a GPU version of FARGO. It is written in C and C for CUDA and runs only on NVIDIA’s graphics cards. Though it corresponds to the standard, isothermal version of FARGO, not all functionnalities of the CPU version have been translated to CUDA. The code is available in single and double precision versions, the latter compatible with FERMI architectures. GFARGO can run on a graphics card connected to the display, allowing the user to see in real time how the fields evolve.

Optimizing Raytracing Algorithm Using CUDA

Directory of Open Access Journals (Sweden)

Sayed Ahmadreza Razian

2017-11-01

The results show that one can generate at least 11 frames per second in HD (720p resolution by GPU processor and GT 840M graphic card, using trace method. If better graphic card employ, this algorithm and program can be used to generate real-time animation.

Soviet Material on Internal Wave Effects, No. 3, April 1975,

Science.gov (United States)

1975-04-01

telemekhanika Acta phyfica polonica Akademiya naiik Armyanskoy SSR. Doklady Akademiya nauk Aserbaydzhanskoy SSR. Doklady Akademiya nauk Belorusskoy SSR... Physica status solid! Pribory i sistemy upravleniya Pribery I tekhnika eksperimenta Radietskhnika Radliotakhnika i elektronika Rafarativnyy zhurnal

Efficient pseudo-random number generation for monte-carlo simulations using graphic processors

Science.gov (United States)

Mohanty, Siddhant; Mohanty, A. K.; Carminati, F.

2012-06-01

A hybrid approach based on the combination of three Tausworthe generators and one linear congruential generator for pseudo random number generation for GPU programing as suggested in NVIDIA-CUDA library has been used for MONTE-CARLO sampling. On each GPU thread, a random seed is generated on fly in a simple way using the quick and dirty algorithm where mod operation is not performed explicitly due to unsigned integer overflow. Using this hybrid generator, multivariate correlated sampling based on alias technique has been carried out using both CUDA and OpenCL languages.

Efficient pseudo-random number generation for Monte-Carlo simulations using graphic processors

International Nuclear Information System (INIS)

Mohanty, Siddhant; Mohanty, A K; Carminati, F

2012-01-01

A hybrid approach based on the combination of three Tausworthe generators and one linear congruential generator for pseudo random number generation for GPU programing as suggested in NVIDIA-CUDA library has been used for MONTE-CARLO sampling. On each GPU thread, a random seed is generated on fly in a simple way using the quick and dirty algorithm where mod operation is not performed explicitly due to unsigned integer overflow. Using this hybrid generator, multivariate correlated sampling based on alias technique has been carried out using both CUDA and OpenCL languages.

Using of opportunities of graphic processors for acceleration of scientific and technical calculations

International Nuclear Information System (INIS)

Dudnik, V.A.; Kudryavtsev, V.I.; Sereda, T.M.; Us, S.A.; Shestakov, M.V.

2009-01-01

The new opportunities of modern graphic processors (GPU) for acceleration of the scientific and technical calculations with the help of paralleling of a calculating task between the central processor and GPU are described. The description of using the technology NVIDIA CUDA for connection of parallel computing opportunities of GPU within the programme of the some intensive mathematical tasks is resulted. The examples of comparison of parameters of productivity in the process of these tasks' calculation without application of GPU and with use of opportunities NVIDIA CUDA for graphic processor GeForce 8800 are resulted

L’interconnessione dei registri europei della proprietà immobiliare: il caso italiano e spagnolo a confronto

Directory of Open Access Journals (Sweden)

Agostina Lodde

2017-06-01

Full Text Available La necessità che le informazioni detenute dai Registri Immobiliari possano liberamente circolare all’interno dello spazio dell’Unione rappresenta un obiettivo prioritario nell’ambito della strategia delineata dal Consiglio UE in materia di giustizia elettronica europea 2014-2018, la quale prevede di incentrare l’azione “sulla interconnessione dei registri che presentino un interesse per i cittadini, le imprese, gli operatori della giustizia e i magistrati”. Pertanto, si afferma che “si dovrebbero assicurare i presupposti tecnici e giuridici necessari per rendere possibile tale interconnessione”. La realizzazione dei “presupposti tecnici” di cui si parla, grazie agli sviluppi straordinari delle tecnologie informatiche, rappresenta il traguardo meno difficile da raggiungere, mentre è di gran lunga più complicato risolvere le difficoltà giuridiche derivanti dalla storica diversità dei Registri, tenendo anche in considerazione il limite posto dall’art. 345 del Trattato sul Funzionamento dell’Unione Europea, secondo il quale “I trattati lasciano del tutto impregiudicato il regime di proprietà esistente negli Stati membri”. Per meglio comprendere le suddette diversità e facendo seguito alla panoramica sui diversi sistemi europei di registrazione immobiliare illustrata da Lodde (2016, si è cercato di fornire un quadro comparato dei sistemi di registrazione italiano e spagnolo, sistemi che poggiano su tradizioni giuridiche comuni (quelle di civil law ma che, per diversi percorsi evolutivi, sono pervenuti a una regolamentazione completamente differente dei rispettivi Registri.

Disturbi mentali come complex network : Un’ introduzione e una panoramica all’ approccio network in psicopatologia

NARCIS (Netherlands)

Nuijten, M.B.; Deserno, Marie K.; Cramer, A.O.J.; Costantini, Giulio; Borsboom, Denny

2016-01-01

I disturbi mentali sono stati tradizionalmente concepiti come variabili latenti, che hanno un impatto sulla sintomatologia osservabile. Approcci alternativi proposti più recentemente invece concepiscono i disturbi mentali come sistemi di sintomi che si rinforzano vicendevolmente. Tali approcci

GPUs, a new tool of acceleration in CFD: efficiency and reliability on smoothed particle hydrodynamics methods.

Directory of Open Access Journals (Sweden)

Alejandro C Crespo

Full Text Available Smoothed Particle Hydrodynamics (SPH is a numerical method commonly used in Computational Fluid Dynamics (CFD to simulate complex free-surface flows. Simulations with this mesh-free particle method far exceed the capacity of a single processor. In this paper, as part of a dual-functioning code for either central processing units (CPUs or Graphics Processor Units (GPUs, a parallelisation using GPUs is presented. The GPU parallelisation technique uses the Compute Unified Device Architecture (CUDA of nVidia devices. Simulations with more than one million particles on a single GPU card exhibit speedups of up to two orders of magnitude over using a single-core CPU. It is demonstrated that the code achieves different speedups with different CUDA-enabled GPUs. The numerical behaviour of the SPH code is validated with a standard benchmark test case of dam break flow impacting on an obstacle where good agreement with the experimental results is observed. Both the achieved speed-ups and the quantitative agreement with experiments suggest that CUDA-based GPU programming can be used in SPH methods with efficiency and reliability.

Preparation of Impervious Pyrolytic Carbon Coatings and Application to Dispersed Fuels; Preparation de revetements de carbone pyrolytique etanches - applications aux combustibles disperses; Prigotovlenie nepronitsaemogo uglerodnogo piroliticheskogo pokrytiya dlya dispergirovannogo topliva; Preparacion de revestimientos estancos de carbono piroutico: aplicacion a los combustibles nucleares dispersos

Energy Technology Data Exchange (ETDEWEB)

Auriol, A.; David, C. [Battelle Memorial Institute, Geneve (Switzerland); Fillatre, A.; Kurka, G.; Le Boulbin, E.; Rappeneau, J. [Commissariat a l' Energie Atomique (France)

1963-11-15

A method of depositing pyrolytic carbon, which adheres well to a graphite support and is gas-tight, was developed and the physical properties of the deposit were evaluated. The fluidized bed technique was used in applying this method of coating to fissile granules of uranium oxide and uranium carbide. After explaining the conditions for coating the granules, the authors examined their macrostructure, microstructure and permeability. Their behaviour at high temperature was investigated with a view to using them in a reactor. (author) [French] Une methode de deposition de carbone pyrolydque adherant bien au graphite support et etanche aux gaz a ete mise au point. Les proprietes physiques du depot ont ete evaluees. Cette methode de revetement a ete transposee a des granules fissiles d'oxyde et de carbure d'uranium en utilisant la technique du lit fluidise. Apres avoir precise les conditions de revetement de ces granules, on etudie leur macrostructure, leur microstructure, ainsi que leur permeabilite. Le comportement de ces granules a haute temperature a ete examine en vue de leur utilisation eventuelle dans un reacteur. (author) [Spanish] Los autores han elaborado un metodo para depositar carbono pirolitico que se adhiere fuertemente al soporte de grafito y es estanco a los gases. Han determinado las propiedades de dicho deposito. Este metodo de revestimiento fue aplicado a granulos fisionables de oxido y de carburo de uranio, utilizando la tecnica del lecho fluidificado. Despues de determinar las condiciones en que se efectua el revestimiento de esos granulos, los autores estudiaron su macroestructura y su microestructura, asi como su permeabilidad. Examinaron tambien su comportamiento a temperatura elevada, con miras a utilizarlos oportunamente en los reactores. (author) [Russian] Razrabotan metod osazhdeniya piroliticheskogo ugleroda, khorosho pokryvayushchego grafitovuyu osnovu s polucheniem nepronitsaemogo dlya gazov pokrytiya. Otseneny fizicheskie svojstva

The Measurement of Natural Tritium Levels in Geiger Counters; Determination quantitative du tritium naturel par compteurs Geiger; Izmerenie urovnej estestvennogo tritiya v schetchikakh Gejgera; Medicion de concentraciones naturales de tritio mediante contadores Geiger

Energy Technology Data Exchange (ETDEWEB)

O' Brien, B J [Institute of Nuclear Sciences, Gracefield (New Zealand)

1962-01-15

-argona v kachestve gaza dlya gasheniya. Pologaya chast' kharakteristiki skorosti otscheta nesovpadenij byla neudovletvoritel'noj pri nizkikh skorostyakh scheta, chto ob{sup y}asnyaetsya plokhim gasheniem, a poehtomu byli provedeny poiski gazov s bolee ehffektivnym gasheniem. Rassmatrivaetsya nakonl pologoj chasti kharakteristiki skorosti otscheta istochnika Fona, a takzhe ukazyvayutsya neobkhodimye svojstva podkhodyashchego gasyashchego gaza dlya otscheta vodoroda. Privodyatsya rezul'taty izucheniya kharakteristik podscheta vodoroda, kotoryj gasitsya s pomoshch'yu benzola, bromistogo ehtila, prostogo ehtilovogo ehfira, izopropilovogo amina, geksana, ehtil-amina i izoprena. V chastnosti, ehtil-amin i ehfir dayut ves'ma udovletvoritel'nye gasyashchie kharakteristiki. Soderzhitsya opisanie schetnoj sistemy, ispol'zuyushchej schetchik, napolnennyj do 40 cm vodorodom i gasimyj ehtil-aminom. Koehffitsient fona sostavlyaet 3 otscheta v minutu pri sravnitel'no ploskom fone pologoj chasti kharakteristiki . (author)

Effects of High Power Lasers, No. 6 March - October 1975

Science.gov (United States)

1975-11-12

FZh GiA GiK IAN Arm IAN Az 1 I Avtomatika i tclemekhanika Acta physica polonica Akadcmiya nauk Armyanskoy SSR. Doklady Akademiya nauk...matematika i mckhanika Physica status solidl Pribory i sistemy upravlcniya Pribory i tekhnika ekspcrimenta Radiotekhnika Radiotekhnika i

Pene canoniche, sanzioni islamiche e modelli economico-speculativi: i diritti religiosi a sostegno della finanza etica

Directory of Open Access Journals (Sweden)

Francesco Sorvillo

2016-03-01

SOMMARIO: 1. Elementi distorsivi caratterizzanti ed effetti collaterali dei modelli economico-speculativi – 2. Il ruolo delle religioni nell’ammortamento delle devianze dei sistemi di mercato – 3. Pene canoniche e sanzioni islamiche: i diritti religiosi a sostegno della finanza etica.

Effectiveness of the cross-compliance standard 5.2 'buffer strips' on protecting freshwater against diffuse nitrogen pollution

Directory of Open Access Journals (Sweden)

Bruna Gumiero

2016-02-01

Full Text Available Sette Fasce Tampone, realizzate secondo le indicazioni tecniche contenute nello standard di condizionalità 5.2, in diversi ambiti e contesti climatici, sono state monitorate per un periodo biennale, al fine di quantificare la loro efficienza nella rimozione di azoto inorganico disciolto. Tale azoto è costituito per lo più da molecole di azoto nitrico che vengono veicolate principalmente tramite deflussi sub-superficiali da zone soggette a diverse pratiche colturali verso i corpi idrici superficiali adiacenti. Ad eccezione di due casi: i siti di Lodi e Metaponto, in tutti i sistemi monitorati è stata confermata la presenza di deflussi trasversali ai sistemi tampone, permanenti o temporanei, in grado di veicolare inquinanti e con portate variabili fra 919 e 8.590 m3/anno per 100 m lineari di FT. Le differenze di portata sono imputabili principalmente alla diversa superficie dei bacini agricoli afferenti ai sistemi tampone, che nei casi analizzati occupano superfici variabili fra il 3,6 ed il 33,3% del bacino agricolo. Sulla base dei bilanci di massa è emerso che dai campi coltivati giungono ai sistemi tampone percentuali variabili fra l’1,6 ed il 29,4% dell’azoto inorganico applicato. Ad eccezione dei sistemi in cui i maggiori deflussi non hanno alcuna interazione con la rizosfera (deflussi profondi oppure non attraversano la Fascia Tampone, in tutti gli altri siti si registra un effetto di riduzione dell’azoto fra entrata ed uscita, con percentuali variabili fra il 33 ed il 62 %. Percentuali di abbattimento non elevate sono giustificate dallo scarso grado di maturazione dei siti monitorati, in molti casi recentemente convertiti a Fascia Tampone. Ancora una volta si conferma l’estrema eterogeneità delle risposte di questi sistemi ed il ruolo prioritario delle forzanti idrologiche nel determinarne l’efficacia.Seven buffer strips (BS adjacent to fresh water bodies, realized according to the technical data contained in the standard 5

Effectiveness of the cross-compliance Standard 5.2 'buffer strips' on protecting freshwater against diffuse nitrogen pollution

Directory of Open Access Journals (Sweden)

Bruna Gumiero

2016-02-01

Full Text Available Sette Fasce Tampone, realizzate secondo le indicazioni tecniche contenute nello Standard di condizionalità 5.2, in diversi ambiti e contesti climatici, sono state monitorate per un periodo biennale, al fine di quantificare la loro efficienza nella rimozione di azoto inorganico disciolto. Tale azoto è costituito per lo più da molecole di azoto nitrico che vengono veicolate principalmente tramite deflussi sub-superficiali da zone soggette a diverse pratiche colturali verso i corpi idrici superficiali adiacenti. Ad eccezione di due casi: i siti di Lodi e Metaponto, in tutti i sistemi monitorati è stata confermata la presenza di deflussi trasversali ai sistemi tampone, permanenti o temporanei, in grado di veicolare inquinanti e con portate variabili fra 919 e 8.590 m3/anno per 100 m lineari di FT. Le differenze di portata sono imputabili principalmente alla diversa superficie dei bacini agricoli afferenti ai sistemi tampone, che nei casi analizzati occupano superfici variabili fra il 3,6 ed il 33,3% del bacino agricolo. Sulla base dei bilanci di massa è emerso che dai campi coltivati giungono ai sistemi tampone percentuali variabili fra l’1,6 ed il 29,4% dell’azoto inorganico applicato. Ad eccezione dei sistemi in cui i maggiori deflussi non hanno alcuna interazione con la rizosfera (deflussi profondi oppure non attraversano la Fascia Tampone, in tutti gli altri siti si registra un effetto di riduzione dell’azoto fra entrata ed uscita, con percentuali variabili fra il 33 ed il 62 %. Percentuali di abbattimento non elevate sono giustificate dallo scarso grado di maturazione dei siti monitorati, in molti casi recentemente convertiti a Fascia Tampone. Ancora una volta si conferma l’estrema eterogeneità delle risposte di questi sistemi ed il ruolo prioritario delle forzanti idrologiche nel determinarne l’efficacia. Seven buffer strips (BS adjacent to fresh water bodies, realized according to the technical data contained in the Standard 5

Wave Partial Differential Equation

OpenAIRE

Szöllös, Alexandr

2009-01-01

Práce se zabývá diferenciálními rovnicemi, jejich využitím při analýze     vedení, experimenty s vedením a možnou akcelerací výpočtu v GPU  s využitím prostředí nVidia CUDA. This work deals with diffrential equations, with the possibility     of using them for analysis of the line and the possibility     of accelerating the computations in GPU using nVidia CUDA. C

Industrial Sterilization st the Electron Linear-Accelerator Facility at Risoe; Sterilisation industrielle a l'aide de l'accelerateur lineaire d'electrons de Riso; Promyshlennaya sterilizatsiya oblucheniem na linejnom uskoritele ehlektronov v Rizo; Esterilizacion industrial con ayuda del acelerador lineal de electrones de Riso

Energy Technology Data Exchange (ETDEWEB)

Brynjolfsson, A.; Holm, N. W.; Tharup, G.; Sehested, K. [Accelerator Section, Danish Atomic Energy Commission, Research Establishment Risoe (Denmark)

1963-11-15

cherez pryamo pered nim nakhodyashcheesya okoshko ili cherez ustrojstvo dlya izmeneniya napravleniya i razvertyvaniya puchka. Izmenivshij napravlenie i razvernutyj puchok primenyaetsya dlya obrabotki oblucheniem. Podlezhashchie oblucheniyu pakety peremeshchayutsya v pole oblucheniya s pomoshch'yu konvejernoj sistemy s polnym diapazonom skorostej ot 0,2 do 600 mm/sek, chem dostigaetsya poluchenie shirokogo diapazona doz pri fiksirovannoj naladke uskoritelya. Ustanovka ehkspluatiruetsya s oseni 1960 goda, obsluzhivaya nauchnoissledovatel'skie instituty Danii, a s 1961 goda - takzhe i radiatsionnuyu promyshlennuyu sterilizatsiyu meditsinskikh priborov, naprimer shpritsev, kateterov, ustanovok po perelivaniyu i vnutrivennomu vlivaniyu krovi i legochno- serdechnye apparaty. Ob{sup e}m obrabotki postoyanno vozrastaet, kolichestvo paketov, obrabotannykh v techenie pervykh trekh mesyatsev 1963 goda, sostavlyaet priblizitel'no 3000. V odnom pakete mogut pomeshchat'sya, naprimer, 900 shpritsev, kazhdyj ob{sup e}mom 2 cm{sup 3}. Provedena bol'shaya rabota po usovershenstvovaniyu metodov oblucheniya, v tom'chisle po primeneniyu reflektornykh sistem, avtomaticheskogo regulirovaniya dozy, obychnoj dozimetrii i vizual'nym tsvetnym indikatoram. Laetsya kratkij obzor ehtikh vazhnykh v tekhnicheskom otnoshenii detalej, i opisyvaetsya sam protsess sterilizatsii, v tom chisle obrabotka, upravlenie i dozimetriya. Nakonets,daetsya informatsiya otnositel'no stoimosti ehkspluatatsii. (author)

A Low-Background Liquid-Scintlllation Counter for the Assay of Low-Specific Activity Tritiated Water; Compteur a scintillations a liquides, a faible mouvement propre, pour le dosage d'eau tritiee en faible activite specifique; ZHidkostnyj stsintillyatsionnyi schetchik s nizkim fonom dlya analiza nasyshchennoj tritiem vody s nizkoj udel'noj aktivnost'yu; Contador de centelleador liquido de reducida actividad de fondo para el analisis de agua pritiada de baja actividad especifica

Energy Technology Data Exchange (ETDEWEB)

Boyce, I S; Cameron, J F [Wantage Research Laboratory, Wantage (United Kingdom)

1962-01-15

emana del fotocatodo del fotomultiplicador. Utilizando dos fotomultiplicadores con fotocatodos de pyrex en contacto, encerrados en un blindaje de hierro de 20 cm de espesor, hicieron experimentos para determinar la importancia relativa de las siguientes posibles causas de la actividad de fondo: a) Ionizacion y excitacion del gas residual y de las superficies del dinodo semiconductor, especialmente en las regiones en que la densidad de corriente es maxima; b) Formacion de chispas, electroluminiscencia y emision de campo; c) Realimentacion de iones positivos al fotocatodo, que provoca una emision de electrones, secundarios ; d) Funcionamiento de la propia ventana fotocatodica en caracter de ''fosforo'' para la radiacion cosmica, las particulas del {sup 40}K o las radiaciones de los productos de filiacion del uranio. Los autores comprobaron que, en particular, el factor c) interviene en una proporcion mucho menor que lo que se habia supuesto. Estudiaron metodos para reducir a un minimo estos efectos, incluyendo el uso de fotocatodos de cuarzo y fotomultiplicadores especiales. Con el dispositivo disenado por los autores, la minima actividad especifica detectable, con un tiempo de recuento de 30 min, asciende a 6 x 10{sup 7}{mu}c/ml. (author) [Russian] Pri schege zhidkostnykh stsintillyatsij nasytsennoj tritiem vody schetchiki s odnim fotoumnozhitelem i sistemy sovpadenij dayut pokazaniya sravnitel'noj chuvstvitel'nosti. Dlya issledovaniya scheta izlucheniya maloj intensivnosti byla primenena sistema sovpadenij dlya togo, chtoby izbezhat' neopredelennosti v fone, vyzyvaemom izmeneniemi odnogo fotona v rezul'tate fosforestsentsii i khimicheskoj lyuminestsentsii v rastvore. Bylo obnaruzheno, chto vozniknovenie fona v ehtoj sisteme ob{sup y}asnyaetsya glavnym obrazom dejstviem sveta, iskhodyashchego iz fotokatoda fotoumnozhitelya. Byli provedeny ksperimenty s primeneniem dvukh fotoumnozhitelej s fotokatodami Pireks v kontakte s zheleznym ehkranom tolshchinoj v 8 dyujmov dlv

Köyyollarının Takibi, Bakım Ve Onarımı İçin Coğrafi Bilgi Sistemi (CBS Esaslı Yönetim Modeli: Denizli Örneği

Directory of Open Access Journals (Sweden)

Yetiş Şazi Murat

2013-06-01

Full Text Available Coğrafi Bilgi Sistemleri (CBS özellikle gelişmiş ülkelerde her alanda sıklıkla kullanılan bir araç haline gelmişken Türkiye' de, merkezi ve yerel yönetimlerce benimsenmiş olmakla birlikte kamu hizmetlerinde kullanımı ise henüz emekleme aşamasındadır. Denizli İl Özel İdaresi Yol ve Ulaşım Hizmetleri Müdürlüğü bünyesinde il sınırları içindeki sorumluluk ve hizmet alanında bulunan köyyolları envanterinin güncellenmesi, farklı analiz sonuçları üzerinden Müdürlüğün kırsal altyapı hizmetlerine modern ve teknik yöntemlerle yön verilmesi amaçlı CBS destekli bir çalışma ortaya konulmuştur. Strateji Geliştirme Müdürlüğü ile birlikte yürütülen bu çalışmada farklı amaçlar için geliştirilmiş olan katmanlar, topoğrafik haritalar, uydu fotoğrafları vb. araçlardan istifade edilerek köyyolları ile ilgili yürütülen hizmetin doğru ve güncel verilere dayalı olmasına çalışılmıştır. Kamu kaynaklarının etkin kullanılmasını sağlayabilecek hassas ve hızlı analiz sonuçlarına göre köyyolları ulaşımının yeniden planlanması, eksik ve hatalı durumların tespiti ile tam ve bütünleşik bir yönetim sistemi kurulması amaçlı pilot bir proje ortaya konulmaya ve ürün olarak kullanılması yoluna gidilmiştir.

Prescribed burning techniques

Directory of Open Access Journals (Sweden)

Leone V

2014-02-01

Full Text Available Nella collana “Scienza e innovazione per i sistemi forestali ed ambientali” della Editrice Aracne è stato recentemente pubblicato il volume “La tecnica del fuoco prescritto” a cura di G. Bovio e D. Ascoli dell’Università di Torino.

GSM SiNYALLERİNİN .IP OMURGASI İİZERiNI>E TAŞINMASI (SS7 OVER IP- NettcSS7)

OpenAIRE

Tülü, Çağatay Neftali; Demirkol, Aşkın

2003-01-01

Bu çalışmada günümüzün en popüler nıobilhaberleşme sistemi olan GSM [1 l sisteminin, kendiöğeleri aras1ndaki en temel sinyalleşme sistemi olannumara 7 (SS7 [2) ) sinyallerinin, günümüzün enyaygın iletim omurgast olan ve tüm dünyadakibilgisayarları birbirine bağlayan IP (3] omurgasıüzerinden taşınabilmesi için gerekli si stemin tasar11n1ve gerçeklenınesi üzerinde çahş1lmtştır. Klasil\\ SS7iletimine göre en büyül< faydası çok düşül{ maliyetiolan bu sistem sayesinde, dünyadaki b i r çok GS...

The use of oxygen-14 in the study of positron polarization in a Fermi-type transition; Emploi de l'oxygene-14 pour l'etude de la polarisation des positions dans une transition du type Fermi; Ispol'zovanie kisloroda-14 dlya issledovaniya polyarizatsii pozitronov v prevrashcheniyakh tipa Fermi; Empleo del oxigeno-14 en el estudio de la polarizacion de los positrones en una transicion de tipo Fermi

Energy Technology Data Exchange (ETDEWEB)

Schmidt, F H; Gerhart, J B; Hopkins, J C; Bichsel, H; Stroth, J [University of Washington, Seattle, WA (United States)

1962-01-15

. Estos rayos gamma son dispersados en hierro imantado por efecto Compton e identificados en un contador de centelleo de Nal(Tl). La asimetria de .la seccion eficaz de dispersion con respecto a la direccion de magnetizacion esta relacionada con la magnitud original de la polarizacion de los positrones. El segundo metodo consistio en dirigir los positrones sobre una lamina de hierro imantada. La seccion eficaz de dispersion positron-electron, o de Bhabha, depende del sentido de la magnetizacion de la lamina de hierro con respecto a la polarizacion de los positrones. Los electrones y positrones dispersos fueron detectados en contadores de centelleo, de material plastico, conectados a un circuito de coincidencias rapidas. En ambos metodos las asimetrias previstas son pequenas, lo cual exige periodos largos de recuento. Los experimentos han demostrado que los positrones de 1 MeV procedentes de {sup 14}O tienen polarizacion dextrogira. El metodo de aniquilacion dio un valor (0,73 {+-} 0,17) v/c; el metodo de dispersion de Bhabha dio (0,97 {+-} 0,19) v/c. La teoria mas simple predice un valor de 1,00 v/c. Se supone que el metodo de dispersion de Bhabha es el que da mejores resultados, sobre todo porque la relacion entre la asimetria y la polarizacion es mas facil de calcular. (author) [Russian] V dvukh ehksperimentakh radioizotop O{sup 14} s korotkim poluperiodom raspada byl vybran dlya opredeleniya stepeni polyarizatsii obrazuyushchikhsya pri raspade pozitronov. V svete teorii dvojnogo betaraspada, predlozhennoj vpervye Li i YAngom, nesokhranenie chetnosti ukazyvaet, chto spinovyj moment kolichestva dvizheniya pozitronov polyariziruetsya v napravlenii dvizheniya na kolichestvo, proportsional'noe ikh skorosti, delennoj na skorost' sveta. Postoyannaya proportsional'nosti zavisit ot roda vzaimodejstviya, vyzyvayushchego protsess raspada. Svojstva 72-sekundnogo O{sup 14} podkhodyat dlya proverki nekotorykh aspektov ehtoj teorii. Kislorod O{sup 14} raspadaetsya ot nulevogo spina

Considerations on global access to rights: anlysis of multilingual search tools

Directory of Open Access Journals (Sweden)

Ginevra Peruginelli

2011-05-01

Full Text Available In una società globalizzata come quella odierna vi è una forte necessità, nell’accademia, nella professione legale, nel mondo degli affari ed in quello dei servizi della pubblica amministrazione, di una comune comprensione dei concetti giuridici dei diversi ordinamenti. Allo stesso tempo si assiste ad una forte pressione verso la conservazione del loro senso e valore. È difficile soddisfare entrambi i requisiti a causa della complessità del linguaggio giuridico e delle diverse modalità utilizzate per esprimere il diritto nei vari sistemi giuridici. A differenza di altre discipline, in cui esiste una corrispondenza tra i concetti espressi nelle varie lingue, nel diritto insorgono serie difficoltà di interpretazione dovute alla natura della terminologia giuridica, intimamente legata al sistema giuridico di riferimento. L'articolo offre alcuni spunti di riflessione sui requisiti dei sistemi di ricerca multilingue dell'informazione giuridica, esaminando gli aspetti linguistici e concettuali che devono essere presi in considerazione nello sviluppo di tali sistemi e soffermandosi sulle problematiche della traduzione giuridica, del diritto comparato e delle tecniche di elaborazione del linguaggio naturale ai fini dell’accesso e recupero dell'informazione in un contesto distribuito. Le raccomandazioni riguardano da un lato le metodologie per stabilire equivalenze funzionali fra concetti giuridici, dall'altro possibili forme di cooperazione fra istituzioni responsabili dell'indicizzazione e distribuzione di informazioni giuridiche. Tutto ciò per garantire ad ogni cittadino di accedere all’informazione nella molteplicità di lingue in cui si manifesta e allo stesso tempo di ricercarla nella lingua preferita.

Opticks : GPU Optical Photon Simulation for Particle Physics using NVIDIA® OptiX™

Science.gov (United States)

C, Blyth Simon

2017-10-01

Opticks is an open source project that integrates the NVIDIA OptiX GPU ray tracing engine with Geant4 toolkit based simulations. Massive parallelism brings drastic performance improvements with optical photon simulation speedup expected to exceed 1000 times Geant4 when using workstation GPUs. Optical photon simulation time becomes effectively zero compared to the rest of the simulation. Optical photons from scintillation and Cherenkov processes are allocated, generated and propagated entirely on the GPU, minimizing transfer overheads and allowing CPU memory usage to be restricted to optical photons that hit photomultiplier tubes or other photon detectors. Collecting hits into standard Geant4 hit collections then allows the rest of the simulation chain to proceed unmodified. Optical physics processes of scattering, absorption, scintillator reemission and boundary processes are implemented in CUDA OptiX programs based on the Geant4 implementations. Wavelength dependent material and surface properties as well as inverse cumulative distribution functions for reemission are interleaved into GPU textures providing fast interpolated property lookup or wavelength generation. Geometry is provided to OptiX in the form of CUDA programs that return bounding boxes for each primitive and ray geometry intersection positions. Some critical parts of the geometry such as photomultiplier tubes have been implemented analytically with the remainder being tessellated. OptiX handles the creation and application of a choice of acceleration structures such as boundary volume hierarchies and the transparent use of multiple GPUs. OptiX supports interoperation with OpenGL and CUDA Thrust that has enabled unprecedented visualisations of photon propagations to be developed using OpenGL geometry shaders to provide interactive time scrubbing and CUDA Thrust photon indexing to enable interactive history selection.

Exploiting graphics processing units for computational biology and bioinformatics.

Science.gov (United States)

Payne, Joshua L; Sinnott-Armstrong, Nicholas A; Moore, Jason H

2010-09-01

Advances in the video gaming industry have led to the production of low-cost, high-performance graphics processing units (GPUs) that possess more memory bandwidth and computational capability than central processing units (CPUs), the standard workhorses of scientific computing. With the recent release of generalpurpose GPUs and NVIDIA's GPU programming language, CUDA, graphics engines are being adopted widely in scientific computing applications, particularly in the fields of computational biology and bioinformatics. The goal of this article is to concisely present an introduction to GPU hardware and programming, aimed at the computational biologist or bioinformaticist. To this end, we discuss the primary differences between GPU and CPU architecture, introduce the basics of the CUDA programming language, and discuss important CUDA programming practices, such as the proper use of coalesced reads, data types, and memory hierarchies. We highlight each of these topics in the context of computing the all-pairs distance between instances in a dataset, a common procedure in numerous disciplines of scientific computing. We conclude with a runtime analysis of the GPU and CPU implementations of the all-pairs distance calculation. We show our final GPU implementation to outperform the CPU implementation by a factor of 1700.

Implementación en GPU del Estadístico t para análisis de expresión genética en microarreglos

Directory of Open Access Journals (Sweden)

Isaac Villa-Medina

2012-10-01

Full Text Available Introducción: Los microarreglos de ADN son utilizados para analizar simultáneamente el nivel de expresión de genes bajo múltiples condiciones; sin embargo, la masiva cantidad de datos generados hacen que su análisis sea un candidato ideal para su procesamiento en paralelo. La utilización de Unidades de Procesamiento Gráfico de Propósito General (GPG­PU es una alternativa eficiente y de bajo costo, comparada contra aplicaciones que utilizan CPUs. Objetivo: Implementación de algoritmos basados en la Arquitectura de Dispositivos de Cómputo Unificado (CUDA para determinar la significancia estadística en la evalua­ción de los niveles de expresión de genes en microarreglos. Método: Análisis paramétrico t-pareado desarrollado en CUDA. Resultados: La evaluación utilizando la implementación en CUDA es 5 a 30 veces más rápida que la implementación en CPU, dependiendo del nú­mero de genes a ser evaluados. Conclusiones: Los resultados son comparados contra las implementaciones tradicionales en CPU; se proponen mejoras.

A Parallel Supercomputer Implementation of a Biological Inspired Neural Network and its use for Pattern Recognition

International Nuclear Information System (INIS)

De Ladurantaye, Vincent; Lavoie, Jean; Bergeron, Jocelyn; Parenteau, Maxime; Lu Huizhong; Pichevar, Ramin; Rouat, Jean

2012-01-01

A parallel implementation of a large spiking neural network is proposed and evaluated. The neural network implements the binding by synchrony process using the Oscillatory Dynamic Link Matcher (ODLM). Scalability, speed and performance are compared for 2 implementations: Message Passing Interface (MPI) and Compute Unified Device Architecture (CUDA) running on clusters of multicore supercomputers and NVIDIA graphical processing units respectively. A global spiking list that represents at each instant the state of the neural network is described. This list indexes each neuron that fires during the current simulation time so that the influence of their spikes are simultaneously processed on all computing units. Our implementation shows a good scalability for very large networks. A complex and large spiking neural network has been implemented in parallel with success, thus paving the road towards real-life applications based on networks of spiking neurons. MPI offers a better scalability than CUDA, while the CUDA implementation on a GeForce GTX 285 gives the best cost to performance ratio. When running the neural network on the GTX 285, the processing speed is comparable to the MPI implementation on RQCHP's Mammouth parallel with 64 notes (128 cores).

Improved neural network modeling of inverse lens distortion

CSIR Research Space (South Africa)

De Villiers, JP

2011-04-01

Full Text Available . This allows points which are too far o the optical axis to fall on the CCD, to not be mapped erroneously onto the image. 5. RESULTS All timings in Tables 1, 2 and 3 were performed on the same computer. It had an Intel i7-960 CPU, and an NVidia GTX480 GPUs... in pixels for each ANN was averaged and is presented along with the RMS error of the best ANN, the timing is openMP (www.openMP.org) is API for multi-platform shared-memory parallel programming in C/C++ and Fortran. yCUDA (www.nvidia.com/object/cuda home...

Finite Temperature Lattice QCD with GPUs

International Nuclear Information System (INIS)

Cardoso, N.; Cardoso, M.; Bicudo, P.

2011-01-01

Graphics Processing Units (GPUs) are being used in many areas of physics, since the performance versus cost is very attractive. The GPUs can be addressed by CUDA which is a NVIDIA's parallel computing architecture. It enables dramatic increases in computing performance by harnessing the power of the GPU. We present a performance comparison between the GPU and CPU with single precision and double precision in generating lattice SU(2) configurations. Analyses with single and multiple GPUs, using CUDA and OPENMP, are also presented. We also present SU(2) results for the renormalized Polyakov loop, colour averaged free energy and the string tension as a function of the temperature. (authors)

Graphics processing unit based computation for NDE applications

Science.gov (United States)

Nahas, C. A.; Rajagopal, Prabhu; Balasubramaniam, Krishnan; Krishnamurthy, C. V.

2012-05-01

Advances in parallel processing in recent years are helping to improve the cost of numerical simulation. Breakthroughs in Graphical Processing Unit (GPU) based computation now offer the prospect of further drastic improvements. The introduction of 'compute unified device architecture' (CUDA) by NVIDIA (the global technology company based in Santa Clara, California, USA) has made programming GPUs for general purpose computing accessible to the average programmer. Here we use CUDA to develop parallel finite difference schemes as applicable to two problems of interest to NDE community, namely heat diffusion and elastic wave propagation. The implementations are for two-dimensions. Performance improvement of the GPU implementation against serial CPU implementation is then discussed.

Test of numerical methods for the integration of kinetic equations in tropospheric chemistry; Confronto di metodi numerici per l'integrazione di sistemi di equazioni differenziali ordinarie di tipo STIFF inserite nel modello fotochimico Calgrid

Energy Technology Data Exchange (ETDEWEB)

Lorenzini, R.; Passoni, L. [ENEA, Centro Ricerche Ezio Clementel, Bologna (Italy). Dipt. Ambiente

1999-07-01

The integration of ordinary differential equations systems (ODEs) is of significant concern to tropospheric and stratospheric chemistry modelers. The solution of the ODEs requires a large computational effort because of their stiff nature; in a three-dimensional photochemical model the solution of the ODEs required at least 70% of the total CPU time. Several numerical integration techniques exist which attempt to provide accurate and computationally efficient solutions. In this work it is presented a comparison of some of the techniques in terms of solution accuracy and required computational time. It has been compared the Hybrid Solver (Young and Boris, 1977), the Quasi Steady-State Approximation method (Hesstvedt et al., 1978) and the Chemical Solver for Ordinary Differential Equations (Aro, 1996), by using the CALGRID photochemical model. The accuracy is evaluated by comparing the results of every method with the solutions obtained by the Livermore Solver for Ordinary Differential Equations (Hindmarsh, 1980). The comparison has been made varing the parameters of the error tolerances, and taking into account the trade-off between solution accuracy and computational efficiency. [Italian] L'integrazione di sistemi di equazioni differenziali ordinarie (ODEs), e' un problema significativo per i modellisti della chimica troposferica e stratosferica. A causa della loro natura stiff la soluzione degli ODEs richiese un notevole sforzo computazionale; in un modello fotochimico tridimensionale la soluzione degli ODEs richiede almeno il 70% del tempo totale di CPU. Esistono diverse tecniche di integrazione numerica che possono fornire soluzioni accurate e computazionalmente efficienti: in questo lavoro presentiamo un confronto fra alcune tecniche in termini di accuratezza della soluzione e tempo computazionale richiesto. Si sono confrontati il Solver Ibrido (Young and Boris, 1977), il metodo Quasi Steady-State Approximation (Hesstvedt et al., 1978) ed il Chemical

Use of radioactive tracers in studying the transport of solids in watercourses; Emploi de traceurs radioactifs pour l'etude du transport solide dans les cours d'eau; Ispol'zovanie radioaktivnykh indikatorov dlya izucheniya peremeshcheniya tverdykh chastits v vodnykh potokakh; Empleo de indicadores radiactivos para el estudio del transporte de solidos en las corrientes de agua

Energy Technology Data Exchange (ETDEWEB)

Courtois, G [Centre d' Etudes Nucleaires de Saclay (France); Jaeery, P; Heuzel, M [Laboratoire National d' Hydraulique de Chatou (France)

1962-01-15

aplicacion de los indicadores radiactivos a los estudios sobre modelos a escala reducida con el doble proposito de: a) disponer de un procedimiento de investigacion comun para los estudios efectuados sobre el terreno y en los modelos a escala reducida, con el objeto de poder controlar la fidelidad del modelo durante los ensayos de calibracion; b) aprovechar las ventajas que ofrecen los modelos a escala reducida en cuanto a facilidad de observacion y mediciones directas, para estudiar las posibilidades de mejorar el metodo de los indicadores, especialmente en lo que se refiere a la obtencion de datos cuantitativos. (author) [Russian] Natsional'naya gidravlicheskaya laboratoriya, vyrabotavshaya v sotrudnichestve s TSentrom yadernykh issledovanij v Sakle pribory i metody izucheniya dvizheniya donnykh otlozhenij pri pomoshchi metoda radioaktivnykh indikatorov, prilagaet v nastoyashchee vremya usiliya k tomu, chtoby osushchestvit' dejstvitel'no kolichestvennyj sposob issledovanij. Za poslednee vremya bylo provedeno dva opyta v prirodnykh usloviyakh v rekakh; pervyj iz nikh byl posvyashchen izucheniyu uvlecheniya gal'ki vodami Rony, a drugoj - izucheniyu peremeshcheniya peska v reke Niger. Parallel'no s poslednim opytom byli provedeny identichnye ispytaniya na makete reki Niger, sozdannom v laboratorii v SHatu. V ehtikh opytakh bylo ispol'zovano izluchenie margantsa-56 i natriya-24, vyzvannoe neposredstvennoj aktivatsiej tolchenoj kostochki abrikosa, izobrazhavshej v ispytaniyakh na makete prirodnye donnye otlozheniya Nigera. Sovmestnye usiliya laboratorii v SHatu i TSentra yadernykh issledovanij v Sakle napravleny v nastoyashchee vremya na primenenie metoda radioaktivnykh indikatorov k opytam na maketakh s dvojnoj tsel'yu: a) Vyrabotat' odinakovye metody issledovaniya v prirodnykh usloviyakh i na makete dlya proverki tochnosti maketa v stadii opytov po ehtalonirovaniyu; b) Ispol'zovat' legkost' vedeniya nablyudenij i proizvodstva neposredstvennykh izmerenij na maketakh dlya

The Application of Non-Metallic Core Materials in a High-Temperature Reactor Experiment; Utilisation de materes non metalliques dans le coeur d'un reacteur experimental a haute temperature; Ispol'zovanie nemetallicheskikh materialov dlya aktivnoj zony vysokotemperaturnogo opytnogo reaktora; Empleo de materiales no metalicos en el nucleo de un reactor experimental de alta temperatura

Energy Technology Data Exchange (ETDEWEB)

Huddle, R. A.U.; Shepherd, L. R. [Organization for Economic Co-Operation and Development, Dragon Project, Atomic Energy Establishment, Winfrith, Dorset (United Kingdom)

1963-11-15

comportamiento de estos materiales en condiciones de funcionamiento normales. Se comunican los resultados de las investigaciones sobre irradiacion, asi como de los trabajos efectuados en los circuitos del reactor. El objetivo principal de este programa es el perfeccionamiento de los reactores de elevada temperatura refrigerados por gas para aplicarlos a la generacion de electricidad en condiciones rentables. (author) [Russian] Proekt vysokotemperaturnogo reaktora (DRAGON)sozdan dlya razrabotki tekhnologii vysokotemperaturnykh reaktorov s gazovym okhladitelem; v nem predusmatrivalos' sooruzhenie i ehkspluatatsiya opytnogo reaktora na 20 mgvt (tepl.). Reaktor, sooruzhenie kotorogo budet vskore zakoncheno, predstavlyaet soboj sistemu, okhlazhdaemuyu geliem; temperatura na vykhode iz aktivnoj zony budet dostigat' 750{sup o}C. V nem budet ispol'zovat'sya U-235 v kachestve goryuchego i torij v kachestve vosproizvodyashchego materiala. Kharakternoj osobennost'yu sistemy yavlyaetsya otsutstvie kakogo-libo metalla v aktivnoj zone. Vvidu togo, chto v reaktore dolzhny razvivat'sya ves'ma vysokie temperatury,' a imenno, 1050{sup o}C na poverkhnosti teplovydelyayushchego ehlementa i do 1500{sup o}C v naibolee sil'no nagrevaemykh tochkakh topliva, dlya ego sooruzheniya ispol'zovany ogneupornye nemetallicheskie materialy. Vse veshchestvo aktivnoj zony sosredotocheno v teplovydelyayushchem ehlemente, blagodarya chemu sootnoshenie mezhdu poverkhnost'yu teploperedachi i ob{sup e}mom aktivnoj zony dostigaet bol'shogo znacheniya, i, sledovatel'no, pozvolyaet dostigat' vysokoj srednej plotnosti ehnergii v sravnitel'no kompaktnoj sisteme. Kazhdyj teplovydelyayushchij ehlement sostoit ieh gruppy grafitovykh trubok, zapolnennykh grafitovymi tabletkami, soderzhashchimi rasshcheplyayushcheesya i vosproizvodyashchee veshchestva v vide karbidov. Gelievyj okhladitel' prokhodit po osi. kazhdogo teplovydelyayushchego sterzhnya i vyvoditsya u ego osnovaniya, okhladitel' zatem napravlyaetsya v ochistitel

Meccanica quantistica relativistica introduzione alla teoria quantistica dei campi

CERN Document Server

Maiani, Luciano

2012-01-01

Tra gli argomenti trattati: le simmetrie dello spazio-tempo; la particella libera classica; teoria lagrangiana dei campi; quantizzazione dell' equazione di Klein Gordon; quantizzazione del campo elettromagnetico; l'equazione di Dirac; i propagatori dei campi liberi; interazioni; evoluzione nel tempo dei sistemi quantistici; teoria relativistica delle perturbazioni...

Enrico Fermi a Firenze le "Lezioni di meccanica razionale" al biennio propedeutico agli studi di ingegneria : 1924-1926

CERN Document Server

Frosali, Giovanni; Pelosi, Giuseppe

2014-01-01

Enrico Fermi, Premio Nobel per la Fisica nel 1938, ha insegnato alla Regia Università degli Studi di Firenze. La permanenza di Fermi a Firenze fu breve, solo due anni accademici (1924-25 e 1925-26); in questi anni tenne i corsi di fisica matematica e di meccanica razionale. Il presente volume è un contributo alla ricostruzione di questo periodo non molto noto della vita di Fermi, ma segnato scientificamente dalla pubblicazione della statistica che prende il suo nome, base tra l'altro della fisica dei semiconduttori e quindi dell'elettronica moderna. Vengono anche riprodotte nel testo le "Lezioni di meccanica razionale" tenute da Enrico Fermi nel periodo predetto agli studenti di scienze e del biennio propedeutico agli studi di ingegneria. I temi affrontati da Enrico Fermi nelle sue lezioni includono la cinematica e la dinamica del punto, la cinematica e la statica dei sistemi rigidi, inclusa la statica di sistemi più in generale. Infine le lezioni contengono le equazioni di "Lagrangia" e alcuni elementi di...

La formazione delle strutture

CERN Document Server

Carrà, Sergio

1989-01-01

Dalle sue origini ottocentesche di "scienza del calore", la termodinamica è divenuta sempre più scienza della strutture dissipative. Questo perchè alla base dei processi di differenziazione dei sistemi biologici stanno fenomeni di auto-organizzazione che agevolano la formazione delle complesse e ordinate strutture presenti in natura.

Serre fotovoltaiche Attenti alle perdite; Stanghellini: il calo produttivo non è da poco

NARCIS (Netherlands)

Contri, L.; Stanghellini, C.

2010-01-01

Gli installatori di pannelli fotovoltaici hanno nel mirino gli ortoflorovivaisti che gestiscono serre. Costoro, per contro, sono alla ricerca di sistemi atti a far loro recuperare la marginalità perduta in questi anni di crisi. Un matrimonio che s'ha da fare? Meglio di no. A sconsigliarlo è Cecilia

Una community emergente tra progettazione territorio e infrastrutture La prima conferenza Autodesk degli utenti italiani

Directory of Open Access Journals (Sweden)

Redazione Redazione

2005-10-01

Full Text Available La prima edizione dell’Autodesk User Conference dedicata aiSistemi Informativi Territoriali ed alla progettazione delle infrastrutture, tenutasi a Roma il 29 settembre 2005, diventerà l’appuntamento fisso sulla convergenza tra tecnologie CAD e GISche molti reclamavano da tempo.

Post-Construction Testing of the Elk River, Hallam and Piqua Power Reactor Plants; Essais apres construction des centrales nucleaires d'Elk River, de Hallam et de Piqua; Predehkspluatatsionnoe ispytanie Ehlk-riverskoj, Khehlpemskoj i Pikuaskoj ehnergeticheskikh reaktornykh ustanovok; Ensayos posteriores a la construccion de las centrales nucleoelectricas de Elk River, Hallam y Piqua

Energy Technology Data Exchange (ETDEWEB)

Pursel, C. A. [United States Atomic Energy Commission, Argonne, IL (United States)

1963-10-15

mezhdu okonchaniem stroitel'stva (sooruzhenie ehdakij i ustanovka oborudovaniya) i nachalom ehkspluatatsii na moshchnosti (proizvodstvo znachitel'nogo kolichestva ehlektricheskoj ehnergii netto). Ispytaniya presledovali sleduyushchie tseli: 1) proverit' rabochie kharakteristiki ustanovlennogo oborudovaniya; 2) opredelit' nachal'nuyu kritichnost' i koehffitsient reaktivnosti i 3) opredelit' fizicheskie kharakteristiki reaktora i rabochie kharakteristiki ustanovki po mere uvelicheniya moshchnosti. Nakoplennyj opyt mokhet byt' izlozhen v shesti otdel'nykh, no vzaimosvyazannykh razdelakh: 11 programma; 2) stoimost'; 3) potrebnosti v kadrakh; 4) tekhnologiya provedeniya ispytanij; 5) rabota oborudovaniya (vklyuchaya nepoladki) i 6) fakticheskie (po sravneniyu s raschetnymi) kharakteristiki raboty sistemy. Srednyaya proektnaya chislennost' personala, vklyuchaya rabochikh, operatorov, dozimetristov, vspomogatel'nyj tekhnicheskij personal i stazherov, sostavlyaet: dlya ERR - 50, dlya HNPF - 115 i dlya PNPF - 60 chelovek. Podrobnaya tekhnologiya predehkspluatatsionnykh ispytanij v pis'mennom vide byla podgotovlenv dlya kazhdogo vazhnogo komponenta i kazhdoj sistemy ustanovki. Naskol'ko ehto bylo vozmozhno, vse ispytaniya byli provedeny do zagruzki topliva i nachala ehkspluatatsii vsej ustanovki. Oformlenie razreshenij na ehkpluatatsiyu ustanovok (dublikaty litsenzij na neprinadlezhashchie KAEH SSHA ustanovki) zanyalo pochti vse vremya provedeniya predehkspluatatsionnykh ispytanij. Vremya, potrebovavsheesya dlya provedeniya predehkspluatatsionnykh ispytanij kazhdoj iz ehtikh ustanovok, znachitel'no prevysilo pervonachal'no namechennoe vremya. Ispytaniya vskryli ryad yavnykh i predpolagaemykh neispravnostej komponentov, v rezul'tate chego potrebovalos' provesti dopolnitel'nye ispytaniya i analizy. V ryade sluchaev dlya ispravleniya oshibok, dopushchennykh pri izgotovlenii ili konstruirovanii oborudovaniya, komponenty prishlos' remontirovat' ili vidoizmenyat'. Osnovnymi nepoladkami

SU (2) lattice gauge theory simulations on Fermi GPUs

International Nuclear Information System (INIS)

Cardoso, Nuno; Bicudo, Pedro

2011-01-01

In this work we explore the performance of CUDA in quenched lattice SU (2) simulations. CUDA, NVIDIA Compute Unified Device Architecture, is a hardware and software architecture developed by NVIDIA for computing on the GPU. We present an analysis and performance comparison between the GPU and CPU in single and double precision. Analyses with multiple GPUs and two different architectures (G200 and Fermi architectures) are also presented. In order to obtain a high performance, the code must be optimized for the GPU architecture, i.e., an implementation that exploits the memory hierarchy of the CUDA programming model. We produce codes for the Monte Carlo generation of SU (2) lattice gauge configurations, for the mean plaquette, for the Polyakov Loop at finite T and for the Wilson loop. We also present results for the potential using many configurations (50,000) without smearing and almost 2000 configurations with APE smearing. With two Fermi GPUs we have achieved an excellent performance of 200x the speed over one CPU, in single precision, around 110 Gflops/s. We also find that, using the Fermi architecture, double precision computations for the static quark-antiquark potential are not much slower (less than 2x slower) than single precision computations.

Сравнение эффективности технологий OpenMP, nVidia cuda и StarPU на примере задачи умножения матриц

OpenAIRE

Ханкин, Константин

2013-01-01

Приведено описание технологий OpenMP, nVidia CUDA и StarPU, варианты решения задачи умножения двух матриц с задействованием каждой из технологий и результаты сравнения реализаций по требовательности к ресурсам.

Reactivity coefficients by perturbation theory; Calcul des coefficients de re activite par la theorie des perturbations; Koehffitsienty reaktivnosti, opredelennye pri pomoshchi teorii vozmushchenij; Determinacion, de coeficientes de reactividad con ayuda de la teoria de las perturbaciones

Energy Technology Data Exchange (ETDEWEB)

Webster, J W [International Atomic Energy Agency, Vienna (Austria)

1962-03-15

(MCBR). Al calcular la reactividad, se comprueba que el coeficiente correspondiente a la densidad neta del mercurio en el primer proyecto del MCBR es negativo en algunas regiones, y positivo en otras. Es negativo en las regiones de peso estadistico maximo y en las que los cambios de densidad serian mayores al variar la potencia. Por lo tanto, el coeficiente global de densidad del mercurio es negativo, esto es, el coeficiente de vacios es positivo, lo que constituye una condicion que implica peligro. En la formulacion de dos grupos, se aprecia facilmente que modificaciones es preciso introducir en el diseno para que el coeficiente de cavidad sea negativo. Nuevas investigaciones demostraron que era posible introducir dichas modificaciones, lograndose establecer para el MCBR un diseno cuyo coeficiente de vacios es negativo. (author) [Russian] Razvitie formuly teorii vozmushchenij daet khoroshuyu vozmozhnost' ispol'zovat' odin iz glavnykh metodov matematicheskogo issledovaniya, t.e. proizvesti dejstvie po analogii ot prostogo k bolee slozhnomu. V ehtom doklade: a) Rassmatrivaets ya formulirovka teorii vozmushchenij v kachestve metoda rascheta koehffitsientov reaktivnosti. On sostoit, glavnym obrazom, iz razvitiya differentsial'nog o uravneniya dlya sopryazhennogo potoka kak postoyannoj funktsii polozheniya i letargii, vyvodimoe po analogii ot odnoj gruppy differentsial'nog o uravneniya dlya sopryazhennogo potoka. b) Daetsya primenenie dvukhgruppovoj formy teorii vozmushchenij dlya kipyashchego reaktorarazmnozhitelya na bystrykh nejtronakh s rtutnym teplonositelem (MCBR). Vidno, chto koehffitsient reaktivnosti rtuti nizshej plotnosti v khode pervogo ispytaniya proekta MCBR yavlyaetsya otritsatel'nym dlya nekotorykh oblastej i polozhitel'nym dlya drugikh. Odnako on yavlyaetsya otritsatel'nym dlya oblastej naivysshego statisticheskogo vesa i tam, gde izmenenie plotnosti s izmeneniem ehnergii okazyvaetsya naibol'shim. Obshchij koehffitsient plotnosti rtuti yavlyaetsya, takim

Accelerating Solution Proposal of AES Using a Graphic Processor

Directory of Open Access Journals (Sweden)

STRATULAT, M.

2011-11-01

Full Text Available The main goal of this work is to analyze the possibility of using a graphic processing unit in non graphical calculations. Graphic Processing Units are being used nowadays not only for game engines and movie encoding/decoding, but also for a vast area of applications, like Cryptography. We used the graphic processing unit as a cryptographic coprocessor in order accelerate AES algorithm. Our implementation of AES is on a GPU using CUDA architecture. The performances obtained show that the CUDA implementation can offer speedups of 11.95Gbps. The tests are conducted in two directions: running the tests on small data sizes that are located in memory and large data that are stored in files on hard drives.

GPU Computing in Bayesian Inference of Realized Stochastic Volatility Model

International Nuclear Information System (INIS)

Takaishi, Tetsuya

2015-01-01

The realized stochastic volatility (RSV) model that utilizes the realized volatility as additional information has been proposed to infer volatility of financial time series. We consider the Bayesian inference of the RSV model by the Hybrid Monte Carlo (HMC) algorithm. The HMC algorithm can be parallelized and thus performed on the GPU for speedup. The GPU code is developed with CUDA Fortran. We compare the computational time in performing the HMC algorithm on GPU (GTX 760) and CPU (Intel i7-4770 3.4GHz) and find that the GPU can be up to 17 times faster than the CPU. We also code the program with OpenACC and find that appropriate coding can achieve the similar speedup with CUDA Fortran

Struttura reticolare e gestione sistemica per i musei italiani / Network structure and systemic management for Italian museums

Directory of Open Access Journals (Sweden)

Marta Maria Montella

2014-06-01

Full Text Available L’articolo si propone di: a chiarire i caratteri distintivi delle reti museali e dei sistemi museali; b focalizzare le potenzialità di tali assetti strutturali e gestionali per ottimizzare l’efficacia e l’efficienza delle organizzazioni museali italiane; c modellizzare le fasi del processo di costituzione di network museali e di implementazione dei relativi sistemi. A tal fine ci si avvarrà, oltre che della letteratura di merito, anche dell’analisi del Sistema Museale Regionale dell’Umbria, da molti riconosciuto come la più riuscita e innovativa forma di condivisione su larga scala di strategie, servizi, assetti organizzativi, indirizzi culturali, contenuti scientifici e strumentazione tecnica e amministrativa. L’intento è di contribuire agli studi dedicati alle reti e ai sistemi museali, il cui strategico ruolo è ormai largamente riconosciuto, e di prospettare indicazioni di policy ai decision makers della pubblica amministrazione del settore culturale in ordine alla progettazione e allo sviluppo di tali processi.   The article aims to: a clarify the distinctive features of museums net and museum systems; b focus on the potential of these structural and management solution to optimize the effectiveness and efficiency of the Italian museum organizations; c modelize the phases of the process of setting up museum networks and implementation of the related systems. To this end we will make use, in addition to literature on the subject, of the analysis of the Umbria Regional Museum System, widely recognized as the most successful and innovative form of large-scale sharing of strategies, services, organizational structures, cultural policies, scientific contents and administrative and technical equipment. The intention is to contribute to studies on museum networks and systems, whose strategic role is now widely recognized, and propose policy indication to decision makers in the public administration of the cultural sector regarding

Camere aeree oblique: sistemi, applicazioni e prospettive future

Directory of Open Access Journals (Sweden)

Fabio Remondino

2014-10-01

Full Text Available The use of oblique imagery has become a standard for many civil and mapping applications, thanks to the development of airborne digital multi-camera systems, as proposed by many companies. The indisputable virtue of oblique photography lies in its simplicity of interpretation and understanding for inexperienced users allowing their use of oblique images in very different applications, such as building detection and reconstruction, building structural damage classification, road land updating and administration services, etc. We report an overview of the actual oblique commercial systems and the workflow for the automated orientation and dense matching of large image blocks. Perspectives, potentialities, pitfalls and suggestions for achieving satisfactory results are given too.

SISTEMI ZA ČIŠČENJE FOTONAPETOSTNIH MODULOV

OpenAIRE

Džidić, Adnan

2013-01-01

V diplomskem delu so predstavljeni nanopremazi za čiščenje sončnih modulov kot učinkovita metoda za povečanje izplena proizvodnje električne energije sončnih modulov. Opisane so fizikalne osnove delovanja sončnih celic, ki so potrebne za osnovno razumevanje delovanja sončnih modulov. Nanopremazi zagotavljajo, da se umazanija in dežne kapljice ne zadržujejo na aktivni površini sončnih modulov in s tem zagotavljajo čistost površine. Na eksperimentalnem primeru je ovrednoten izplen proizvedene e...

Narushenie sistemy gemostaza u bol'nykh sakharnym diabetom

Directory of Open Access Journals (Sweden)

A Severina

2004-03-01

Full Text Available Процссс свертывания крови определяется состоянием гемостаза 3 компонентов: тромбоцитов, факторов коагуляции и целостности сосудистой стенки. Если хоть один из компонентов нарушен, то активируется процесс, приводящий к повышенному тромбообразованию. Многочисленные исследования доказали, что при СД обоих типов нарушены все три составляющие, необходимые для сохранения нормального свертывания крови. Тромбоциты при СД характеризуются высокой адгезивностью (способностью прилипать к стенке сосуда и склонностью к агрегации (склеиванию друг с другом. Выраженность агрегации и адгезии тромбоцитов регулируется производными арахидоновой кислоты ? простациклином (PGI2 и тромбоксаном (ТхА2. Простациклин синтезируется эндотелиальными клетками сосудов и является мощным вазодилататором и дезагрегантом. Активированные тромбоциты синтезируют тромбоксан, который вызывает спазм сосудов и стимулирует агрегацию тромбоцитов. Исследования последних 15 лет показали, что при СД отмечается повышение синтеза тромбоксана и снижение продукции простациклина. Помимо количественного снижения секреции PGI2 при СД обнаружена сниженная чувствительность тромбоцитов к воздействию этого фактора. Комбинация этих изменений максимально выражена при тяжелых стадиях сосудистых осложнений СД.

Catasto, GPS, Archivio misure e sistemi di riferimento

Directory of Open Access Journals (Sweden)

Domenico Santarsiero

2006-06-01

Full Text Available L’evoluzione delle tecnologie al di fuori della Pubblica Amministrazione corre ad un ritmo inverosimile, se ad esempio si considera che c’è chi ha già pensato e realizzato una guida georeferenziata dei prodotti DOP (Denominazione d’Origine Protetta pronta all’uso su uno qualsiasi tra la pletora di navigatori nati come funghi negli ultimi due anni. Non è invece disponibile alla stessamaniera la mappa catastale dell’intero territorio. Questo permotivi diversi e comprensibili, che gli addetti ai lavori ben conoscono. Il tema del Focus di questo numerodi GEOmedia è specificamente legato al mondo delle informazioni catastali. Questo breve articolovuole prendere in esame le ultime novità nell’ambito delle attività tecniche legate alla ricomposizione del sistema catastale, ed in particolare all’unificazione dei sistemidi riferimento.

Electrical limitations to energy resolution in semiconductor particle detectors; Limitations electriques du pouvoir de resolution en energie des detecteurs a semi-conducteurs; Ehlektricheskie ogranicheniya razreshayushchej sposobnosti po ehnergii v poluprovodnikovykh detektorakh chastits; Limitaciones electricas en la resolucion energetica de detectores de particulas a base de semiconductores

Energy Technology Data Exchange (ETDEWEB)

Hansen, W L; Goulding, F S [Lawrence Radiation Laboratory, University of California, Berkeley, CA (United States)

1962-04-15

isklyuchitel'no svojstvami massy poluprovodnika, privodyatsya uravneniya, dayushchie teoreticheskie predely shuma pri sovmeshchenii detektorov s usilitelyami. Iz ehtikh uravnenij vidno, chto imeyutsya optimal'naya konstanta vremeni dlya usilitelya i napryazhenie smeshcheniya dlya detektora; pri soblyudenii ehtikh uslovij minimal'nyj shum ne zavisit ot udel'nogo soprotivleniya poluprovodnika. Dokazyvaetsya, chto nailuchshie rezul'taty raboty sistemy detektor-usilitel' zavisyat tol'ko ot ploshchadi detektiruyushchej poverkhnosti, vkhodnoj emkosti (za vychetom emkosti samogo detektora), sroka zhizni naimenee mnogochislennogo iz nositelej v poluprovodnike i ot krutizny vkhodnoj ehlektronnoj lampy usilitelya. Opisyvaetsya novaya konstruktsiya detektora s kol'tsevym ograditel'nym ehlektrodom v kachestve neot{sup e}mlemoj chasti konstruktsii detektora, chto v shirokoj mere ustranyaet shum, vyzyvaemyj poverkhnostnoj utechkoj. Soobshchayutsya ehksperimental'nye rezul'taty opredeleniya utechki detektora i razreshayushchej sposobnosti po ehnergii, khorosho sovpadayushchie s teoreticheskimi dannymi. Teoreticheskij predel shuma, vyrazhennogo v vide polnoj shiriny na polovine maksimuma, lezhit dlya kremnievykh detektorov tipa ''p'' v intervale ot 7 do 10 kev na 1 kv.cm pri 25{sup o}C. (author)

Infrastrutture e pianificazione paesaggistica nel rinnovato Codice dei Beni culturali e del Paesaggio

Directory of Open Access Journals (Sweden)

Saverio Santangelo

2012-08-01

Full Text Available Le infrastrutture agiscono sul paesaggio con effetti sia diretti, e spazialmente limitati, che indiretti, e non precisamente limitati nello spazio e nel tempo. Gli effetti indiretti, in particolare, riguardano anche le infrastrutture che non vediamo, perché nel sottosuolo, o di cui vediamo solo gli elementi puntuali e materiali di reti prevalentemente immateriali. In quest’ultimo caso si tratta dei sistemi di flusso delle informazioni, che oggi e ancor più in prospettiva, insieme ai sistemi per la produzione locale di energia (segnatamente fotovoltaico ed eolico, rafforzano le tendenze all’indifferenza dei fattori localizzativi di attività e residenze. Tutto questo da un lato consente riduzioni dei suoli impegnati e, per alcuni versi, la stessa salvaguardia del paesaggio (possono ridursi le reti fisiche per il trasporto di energia elettrica e gas, ed esempio, ma dall’altro favorisce nuove domande di suolo a fini urbanizzativi e di infrastrutture, non soltanto stradali, per servire ed accedere alle nuove aree interessate dalla domanda, e quindi comporta altri impatti sul paesaggio.

Conoscere il patrimonio architettonico: il DARDUS dell’Università Politecnica delle Marche

Directory of Open Access Journals (Sweden)

Eva Savina Malinverni

2007-03-01

Full Text Available E’ in questa ottica che all’interno del Dipartimento collaborano docenti e ricercatori di vari settori scientificodisciplinari. Nella panoramica che viene qui presentata verrà posto l’accento maggiormente su due filoni di attività che sono anche più inerenti al contesto divulgativo di GEOmedia: il rilievo ed i sistemi informativi. Tematiche sulle quali il gruppo di ricerca del DARDUS ha avviato varie iniziative che verranno di seguito illustrate. Le dinamiche di collaborazione e di ricerca inerenti i temi del rilievo e della documentazione in banche datigeoreferenziate sviluppate nelle sale del Dipartimento riguardano non solo l’ambito architettonico ma anche quello ambientale. Queste attività sono svolte all’interno di laboratori debitamente attrezzati, nei quali docenti, ricercatori e tecnici istruiscono dottorandi, laureandi etirocinanti in stretta collaborazione e produttiva sinergia portando a sviluppare e collaudare nuove procedure e sistemi integrati di acquisizione e gestione dei dati raccoltinella varie esperienze di studio.

La misurazione dei processi di regolazione cognitiva e metacognitiva durante lo studio con gli ipermedia

Directory of Open Access Journals (Sweden)

Roger Azevedo

2010-01-01

Full Text Available L’apprendimento autoregolato rappresenta una modalità di apprendimento di fondamentale importanza quando ci si avvale del supporto di ambienti ipermediali. Obiettivo di questo articolo è presentare quattro assunzioni chiave che consentono la misurazione dei processi cognitivi e metacognitivi attivati durante l’apprendimento tramite ipermedia. Innanzi tutto, assumiamo che sia possibile individuare, tracciare, modellare e favorire processi di apprendimento auto-regolato durante lo studio con gli ipermedia. La seconda assunzione si focalizza sul comprendere come la complessità dei processi regolatori che avvengono durante l’apprendimento mediato da sistemi ipermediali sia importante per determinare il perché alcuni processi vengono messi in atto durante l’esecuzione di un compito. Le terza assunzione è relativa al considerare che l’utilizzo di processi di apprendimento auto-regolato possa dinamicamente cambiare nel tempo e che tali processi sono di natura ciclica (influenzati dalle condizioni interne ed esterne e da meccanismi di feedback. Infine, l’identificazione, raccolta e classificazione dei processi di apprendimento autoregolato utilizzati durante lo studio con sistemi ipermediali, può risultare un compito alquanto difficoltoso.

Radioisotope Power Sources; Sources d'energie utilisant les radiobotopes; Radioizotopnye istochniki ehnergii; Fuentes radio isotopicas de energia

Energy Technology Data Exchange (ETDEWEB)

Culwell, J. P. [USAEC, Washington, D.C (United States)

1963-11-15

, obychno ispuskayut al'fa- ili beta-luchi. Al'fa-izluchateli kak toplivo predstavlyayut bol'shuyu tsennost', no oni stoyat doroge i v to zhe vremya menee dostupny, chem beta-izluchateli, poehtomu ikh, kak pravilo, ispol'zuyut dlya kosmicheskikh zadach. Beta-goryuchee, vydelennoe iz otkhodov reaktora, v nastoyashchee vremya primenyaetsya isklyuchitel'no dlya nazemnykh ili morskikh tselej. Odnako sleduet ozhidat', chto takie beta-izluchateli, kak strontsij-90, v kontse kontsov budut primenyat'sya i v kosmose. V nastoyashchee vremya vedutsya issledovatel'skie raboty s generatorami, v kotorykh v kachestve goryuchego budut primenyat' smeshannye produkty deleniya. Ehto goryuchee budet deshevle, chem chistye radioizotopy, poskol'ku sokratyatsya zatraty na razdelenie izotopov i na ikh ochistku. Prototipom termoehlektri- cheskikh generatorov, pitaemykh strontsiem-90 i tseziem-137, yavlyayutsya uzhe funktsionirujte ili razrabatyvaemye generatory na meteorologicheskikh stantsiyakh, v navigatsii i v glubokovodnykh ustrojstvakh obnaruzheniya. Termoehlektricheskim generatorom, rabotayushchim na plutonii-238, osnashchen iskustvennyj sputnik ''Tranzit'', razrabotannyj voennomorskim vedomstvom SSHA. Razrabatyvayutsya generatory dlya ispol'zovaniya v kosmose Upravleniem po natsional'noj aehronavtike i issledovaniyu kosmicheskogo prostranstva. Vysokaya aktivnost' radioizotopnykh istochnikov ehnergii trebuet, chtoby voprosam bezopasnosti bylo udeleno osoboe vnimanie. Sleduet ustanovit' strogij kontrol' za soblyudeniem tekhniki bezopasnosti i provesti ryad shirokikh ispytanij, chtoby udostoverit'sya, chto radioaktivnye sistemy mogut funktsionirovat', ne nanosya ushcherba okruzhayushchim. (author)

The physics design of EBR-II; Physique du reacteur EBR-II; Fizicheskij raschet ehksperimental'nogo reaktora - razmnozhitelya EVR-II; Aspectos fisicos del reactor EBR-II

Energy Technology Data Exchange (ETDEWEB)

Loewenstein, W. B. [Argonne National Laboratory, Argonne, IL (United States)

1962-03-15

hexagonal del reactor los datos obtenidos en geometrias simples idealizadas, analiticas o experimentales. Se compara el rendimiento nuclear, incluso el de reproduccion, del reactor real con el del modelo teorico y se describen las variaciones a largo plazo de la reactividad y de la generacion de energia en la envoltura fertil, refiriendolas a los ciclos propuestos para el combustible y la envoltura fertil. La memoria formula consideraciones sobre la seguridad estudiando en particular la introduccion de indices de reactividad normales y anormales y la consecuencia de supuestos efectos de reactividad, que se basan en el comportamiento fisico de la aleacion combustible y de la estructura del reactor, asi como en la extrapolacion al sistema del EBR-II de los experimentos realizados con el conjunto TREAT. Por ultimo, examina el problema de la fusion del cuerpo del reactor EBR-II. (author) [Russian] Vychisleniya statisticheskogo, dinamicheskogo i dlitel'nogo rezhima reaktivnosti ehksperimental'nog o reaktora-razmnozhitel ya EBR-II dayutsya sovmestno s rezul'tatami i analizom ehksperimentov na reaktore EBR-II po dostizheniyu kritichnosti v sukhom sostoyanii i otdel'nykh ehksperimentov na reaktore ZPR-III. Osoboe vnimanie udelyaetsya problemam fizicheskogo rascheta reaktora, kotorye voznikayut posle opredeleniya printsipial'noj skhemy i do sooruzheniya ili vvoda reaktora v ehkspluatatsiyu. Opisyvayutsya analiz bezopasnosti reaktora i soobrazheniya po otsenke opasnostej, a takzheikh vliyanie na raschet reaktora. V doklade opisyvaetsya sposob ispol'zovaniya modeli EBR-II na osnovanii poluchennykh na reaktore ZPR-III dannykh, a takzhe dannykh sukhoj kritichnosti reaktora EBR-II. EHti ehksperimenty, ikh analiz i teoreticheskie vykladki yavlyayutsya osnovoj dlya opredeleniya fizicheskogo povedeniya reaktornoj sistemy. Bolee podrobno issleduyutsya ogranicheniya, prisushchie primeneniyu ehksperimental'nykh dannykh k rassmatrivaemo j ehnergeticheskoj reaktornoj sisteme. Syuda otnosyatsya

The Research and Implementation of MUSER CLEAN Algorithm Based on OpenCL

Science.gov (United States)

Feng, Y.; Chen, K.; Deng, H.; Wang, F.; Mei, Y.; Wei, S. L.; Dai, W.; Yang, Q. P.; Liu, Y. B.; Wu, J. P.

2017-03-01

It's urgent to carry out high-performance data processing with a single machine in the development of astronomical software. However, due to the different configuration of the machine, traditional programming techniques such as multi-threading, and CUDA (Compute Unified Device Architecture)+GPU (Graphic Processing Unit) have obvious limitations in portability and seamlessness between different operation systems. The OpenCL (Open Computing Language) used in the development of MUSER (MingantU SpEctral Radioheliograph) data processing system is introduced. And the Högbom CLEAN algorithm is re-implemented into parallel CLEAN algorithm by the Python language and PyOpenCL extended package. The experimental results show that the CLEAN algorithm based on OpenCL has approximately equally operating efficiency compared with the former CLEAN algorithm based on CUDA. More important, the data processing in merely CPU (Central Processing Unit) environment of this system can also achieve high performance, which has solved the problem of environmental dependence of CUDA+GPU. Overall, the research improves the adaptability of the system with emphasis on performance of MUSER image clean computing. In the meanwhile, the realization of OpenCL in MUSER proves its availability in scientific data processing. In view of the high-performance computing features of OpenCL in heterogeneous environment, it will probably become the preferred technology in the future high-performance astronomical software development.

Cpu/gpu Computing for AN Implicit Multi-Block Compressible Navier-Stokes Solver on Heterogeneous Platform

Science.gov (United States)

Deng, Liang; Bai, Hanli; Wang, Fang; Xu, Qingxin

2016-06-01

CPU/GPU computing allows scientists to tremendously accelerate their numerical codes. In this paper, we port and optimize a double precision alternating direction implicit (ADI) solver for three-dimensional compressible Navier-Stokes equations from our in-house Computational Fluid Dynamics (CFD) software on heterogeneous platform. First, we implement a full GPU version of the ADI solver to remove a lot of redundant data transfers between CPU and GPU, and then design two fine-grain schemes, namely “one-thread-one-point” and “one-thread-one-line”, to maximize the performance. Second, we present a dual-level parallelization scheme using the CPU/GPU collaborative model to exploit the computational resources of both multi-core CPUs and many-core GPUs within the heterogeneous platform. Finally, considering the fact that memory on a single node becomes inadequate when the simulation size grows, we present a tri-level hybrid programming pattern MPI-OpenMP-CUDA that merges fine-grain parallelism using OpenMP and CUDA threads with coarse-grain parallelism using MPI for inter-node communication. We also propose a strategy to overlap the computation with communication using the advanced features of CUDA and MPI programming. We obtain speedups of 6.0 for the ADI solver on one Tesla M2050 GPU in contrast to two Xeon X5670 CPUs. Scalability tests show that our implementation can offer significant performance improvement on heterogeneous platform.

Meccanica statistica

CERN Document Server

Touschek, Bruno

1970-01-01

Meccanica statistica e termodinamica dell'oscillatore armonico ; teoria dell'ensemble di Gibbs ; termodinamica covariante ; termodinamica di n gas ideale di particelle identiche ; gas degenere e imperfetto ; sistemi in cui il numero delle particelle non è costante ; proprietà degli stati di non-equilibrio ; i fondamenti microscopici della master equation ; applicazioni della master equation ; teoria del trasporto.

GEOmedia su Marte Uno sguardo alla nuova cartografia di un pianeta

Directory of Open Access Journals (Sweden)

Renzo Carlucci

2007-03-01

Full Text Available L’esplorazione del sistema solare e la necessità di realizzare una cartografia, strumento indispensabile per qualsiasi tipo di indagine il genere umano abbia oggi in mente, ci porta ad affrontare il problema dell’estensione dei sistemi di riferimento, partendo dal presupposto che la Terra non è più ormai il solo oggetto dell’esplorazione geografica.

GIS 2010 e pubblica amministrazione

Directory of Open Access Journals (Sweden)

Renzo Carlucci

2009-03-01

Full Text Available L’apporto della geomatica alla conoscenza del territorio e alla sua difesa spazia su vari aspetti. Dalla difesa idrogeologica al monitoraggio dei movimenti, dalla predisposizione delle mappe urbanistiche all’analisi d’uso del suolo, la sovrapposizione di informazioni su diversi piani costituisce il cuore del funzionamento dei Sistemi Informativi Geografici.

Algoritmo incremental de agrupamiento con traslape para el procesamiento de grandes colecciones de datos (Overlapping clustering incremental algorithm for large data collections processing

Directory of Open Access Journals (Sweden)

Lázaro Janier González-Soler

2015-12-01

Full Text Available Spanish abstract Existen diversos problemas en el Reconocimiento de Patrones y en la Minería de Datos que, por su naturaleza, consideran que los objetos pueden pertenecer a más de una clase o grupo. DClustR es un algoritmo dinámico de agrupamiento con traslape que ha mostrado, en tareas de agrupamiento de documentos, el mejor balance entre calidad de los grupos y eficiencia entre los algoritmos dinámicos de agrupamiento con traslape reportados en la literatura. A pesar de obtener buenos resultados, DClustR puede ser poco útil en aplicaciones que trabajen con grandes colecciones de documentos, debido a que tiene una complejidad computacional y a la cantidad de memoria que utiliza para el procesamiento de las colecciones. En este trabajo se presenta una versión paralela basada en GPU del algoritmo DClustR, llamada CUDA-DClus, para mejorar la eficiencia de DClustR en aplicaciones que lidien con largas colecciones de documentos. Los experimentos fueron realizados sobre varias colecciones estándares de documentos y en ellos se muestra el buen rendimiento de CUDA-DClus en términos de eficiencia y consumo de memoria. English abstract There are several problems in Pattern Recognition and Data Mining that, by its inherent nature, consider that the objects can belong to more than a class or cluster. DClustR is a dynamic overlapping clustering algorithm that has shown, in document clustering tasks, the best trade-off between cluster’s quality and efficiency among existing dynamic overlapping clustering algorithms. However, DClustR could be less useful when working in applications that deal with large data collections, due to its computational complexity and memory demanded for processing them. In this paper, a GPU-based parallel algorithm of DClustR, named CUDA-DClus is suggested to enhance DClustR efficiency in applications dealing with large data collections. The experimental phase conducted over various standard data collections showed that

Fast and maliciously secure two-party computation using the GPU

DEFF Research Database (Denmark)

Frederiksen, Tore Kasper; Nielsen, Jesper Buus

2013-01-01

We describe, and implement, a maliciously secure protocol for two-party computation in a parallel computational model. Our protocol is based on Yao’s garbled circuit and an efficient OT extension. The implementation is done using CUDA and yields fast results for maliciously secure two-party compu......-party computation in a financially feasible and practical setting by using a consumer grade CPU and GPU. Our protocol further uses some novel constructions in order to combine garbled circuits and an OT extension in a parallel and maliciously secure setting.......We describe, and implement, a maliciously secure protocol for two-party computation in a parallel computational model. Our protocol is based on Yao’s garbled circuit and an efficient OT extension. The implementation is done using CUDA and yields fast results for maliciously secure two...

A rapid parallelization of cone-beam projection and back-projection operator based on texture fetching interpolation

Science.gov (United States)

Xie, Lizhe; Hu, Yining; Chen, Yang; Shi, Luyao

2015-03-01

Projection and back-projection are the most computational consuming parts in Computed Tomography (CT) reconstruction. Parallelization strategies using GPU computing techniques have been introduced. We in this paper present a new parallelization scheme for both projection and back-projection. The proposed method is based on CUDA technology carried out by NVIDIA Corporation. Instead of build complex model, we aimed on optimizing the existing algorithm and make it suitable for CUDA implementation so as to gain fast computation speed. Besides making use of texture fetching operation which helps gain faster interpolation speed, we fixed sampling numbers in the computation of projection, to ensure the synchronization of blocks and threads, thus prevents the latency caused by inconsistent computation complexity. Experiment results have proven the computational efficiency and imaging quality of the proposed method.

Chemical Production using Fission Fragments; Emploi des fragments de fission dans la production de substances chimiques; Ispol'zovanie produkto v raspada v khimicheskom proizvodstve; Empleo de los fragmentos de fision en la industria quimica

Energy Technology Data Exchange (ETDEWEB)

Dawson, J K; Moseley, F [AERE, Harwell (United Kingdom)

1960-07-15

'eau. Aucun des systemes etudies jusqu'a present ne parait offrir de possibilites interessantes pour la grande industrie chimique. (author) [Spanish] En una memoria presentada en la segunda Conferencia Internacional sobre la Utilizacion de la Energia Atomica con Fines Pacificos [A/Conf. 15/P. 76] se expusieron algunas consideraciones , atendiendo al diseno de los reactores, sobre la utilizacion de la energia de retroceso de los fragmentos de fision para la produccion de ciertos compuestos quimicos de importancia industrial. La presente memoria pasa revista a los progresos realizados desde entonces en esta materia por el Atomic Energy Research Establishment de Harwell. Los autores examinan la relacion entre el alcance y la energia para los fragmentos de fision al discutirse la eleccion del combustible para un reactor destinado a la produccion de compuestos quimicos y describen la variacion de efecto quimico observada a lo largo de la trayectoria de los fragmentos de fision en la irradiacion de mezclas de nitrogeno y oxigeno. Analizan tambien los resultados de investigaciones recientes acerca de los efectos de fragmentos de fision sobre mezclas de monoxido de carbono e hidrogeno y sobre el vapor de agua. Al parecer, ninguno de los sistemas estudiados hasta la fecha ofrece perspectivas particularmente interesantes para la industria quimica pesada. (author) [Russian] V doklade, predstavlennom ran'she na Vtoroj mezhdunarodnoj konferentsii Organizatsii Ob'edinennykh Natsij po mirnomu ispol'zovaniyu atomnoj ehnergii (A/Conf. 15/P. 76) v svyazi s konstruktsiej reaktorov obsuzhdalis' nekotorye soobrazheniya otnositel'no vozmozhnosti ispol'zovaniya ehnergii otdachi produktov raspada dlya proizvodstva vazhnykh dlya promyshlennosti khimikaliev. V nastoyashchem doklade rezyumiruyutsya bolee nedavnie rezul'taty, dostignutye v ehtoj oblasti Nauchno-issledo-vatel'skim institutom po atomnoj ehnergii v KHaruehlle. Sootnoshenie mezhdu prokhodimym rasstoyaniem i ehnergiej produktov deleniya

The Comparative Accuracy of the 4 {pi} Liquid Scintillation Counting Method of Radioisotope Standardization; L'exactitude comparee de la methode de comptage 4 {pi} a scintillateurs liquides pour l'etalonnage des radioisotopes; Sravnitel'naya tochnost' 4 {pi} zhidkogo stsintillatsionnogo metoda podscheta standartiziruemykh radioizotopov; Exactitud del metodo de recuento con centelleador liquido 4 {pi} para normalizar radioisotopos, comparada con la de otros metodos

Energy Technology Data Exchange (ETDEWEB)

Steyn, J [National Physical Research Laboratory, Pretoria (South Africa)

1960-06-15

The accuracy of the 4 {pi} liquid scintillation counting method of standardizing {beta} emitters was compared to 4 l{pi} {beta}-{gamma} coincidence counting for the nuclides Co{sup 60}, I{sup 131} and Au{sup 198}. For P{sup 32} the liquid counting results were compared to 4 {pi} proportional counting. The efficiency of the liquid scintillation counting method was found to be energy dependent, dropping to about 97.5% for Co{sup 60} which was the lowest energy {beta} emitter investigated. (author) [French] La precision de la methode de comptage 4 {pi} a scintillateurs liquides pour l'etalonnage des emetteurs {beta} a ete comparee au comptage par coincidences 4 {pi} {beta}-{gamma} pour le So{sup 60}, le I{sup 131} et le Au{sup 198}. Dans le cas du P{sup 32}, les resultats du comptage au liquide ont ete compares a ceux du comptage 4 {pi} proportionnel. On a constate que le rendement de la methode de comptage a scintillateurs liquides variait en fonction de l'energie emise et qu'il descendait a environ 97.5% pour le Co{sup 60} qui, de tous les emetteurs {beta} etudies, emet l'energie la plus faible. (author) [Spanish] El autor compara la precision del metodo de recuento con centelleador iquido 4 {pi} para normalizar emisores {beta} con la del metodo de coincidencias {beta}-{gamma} 4 {pi}, para los siguientes nuclidos: So{sup 60}, I{sup 131} y Au{sup 198}. En el caso del P{sup 32}, confronta los resultados del primer metodo con los obtenidos mediante el recuento proporcional 4 {pi}. Comprueba que la eficacia del metodo de recuento con centelleador liquido depende de la energia y desciende al 97.5%, aproximadamente, para el Co{sup 60}, que fue el emisor {beta} mas debil que se investigo. (author) [Russian] Tochnost' 4 {pi} zhidkogo stsintillyatsionnog o metoda podscheta standartiziruemogo {beta}-izluchatelya sravnivalas' s 4 {pi} {beta}-{gamma} metodom podscheta na sovpadeniyakh dlya izotopov So{sup 60}, I{sup 131} i Au{sup 198}. Dlya R{sup 32} rezultaty zhidkogo

Peregrine Software Toolchains | High-Performance Computing | NREL

Science.gov (United States)

Group (PGI) C/C++ and Fortran (partially supported) The PGI Accelerator compilers include NVIDIA GPU support via the directive-based OpenACC 2.5 programming model, as well as full support for NVIDIA CUDA C

The First Two Years of Operating Experience of the Kahl Nuclear Power Station; Experience acquise pendant les deux premieres annees de fonctionnement de la centrale nucleaire de Kahl; Opyt pervykh dvukh let ehkspluatatsii atomnoj ehlektrostantsii v Kale; Experiencia adquirida en los primeros cuatro anos de funcionamiento de la central nucleoelectrica de Kahl

Energy Technology Data Exchange (ETDEWEB)

Bruchner, H. J. [Aeg-Kernenergieanlagen, Frankfurt-am-Main (Germany); Weckesser, A. [Versuchs-Atomkraftwerk Kahl Gmbh, Kahl (Germany)

1963-10-15

, une boucle experimentale destinee a l'etude de la surchauffe nucleaire. (author) [Spanish] La central de Kahl constituye la primera central nucleoelectrica europea de propiedad privada, y funciona en carga desde junio de 1961. Esta equipada con un reactor de agua hi que trabaja en ciclo indirecto por circulacion natural. Su capacidad electrica neta asciende a 15 MW y hasta febrero de 1963 habia producido 140 millones de kWh. La memoria revisara la experiencia adquirida durante su funcionamiento, ante todo con el extenso programa de ensayos sobre el comportamiento transitorio y la exploracion gamma. Presentara datos acerca del resultado que han dado en funcionamiento ciertas partes de la central, tales como el dispositivo de accionamiento de las barras de control, el sistema de purificacion de los gases de escape y la turbina. Una vez terminado el programa de ensayos, la planta se exploto en carga basica durante algun tiempo a fin de reunir datos sobre el rendimiento del combustible en la ptactica. Una vez completada esta fase, se instalara en el reactor de Kahl un circuito experimental de sobrecalentamiento nuclear. (author) [Russian] Atomnaya ehlektrostantsiya v Kale, pervaya v Evrope chastnaya atomnaya ehlektrostantsiya, ehkspluatiruetsya pod nagruzkoj s iyunya 1961 goda. Na ehlektrostantsii ustanovlen reaktor s kipyashchej vodoj, kosvennym tsiklom i estestvennoj tsirkulyatsiej. Chistaya ehlektricheskaya moshchnost' reaktora sostavlyaet 15 mgvt. Do fevralya 1963 goda kolichestvo poluchennoj ehnergii sostavilo 140 mln. kvt.ch. Rassmotren opyt ehkspluatatsii, v chastnosti rasshirennaya programma ispytanij: naprimer,povedenie reaktora pri perekhodnom protsesse i kontrol' gamma-izlucheniya. Budut predstavleny rezul'taty izucheniya ehkspluatatsionnoj kharakteristiki nekotorykh komponentov ustanovki, naprimer sistemy privoda reguliruptsikh sterzhnej, sistemy udaleniya gaza i turbiny. Posle osushchestvleniya ehtoj programmy ispytanij ustanovka v techenie nekotorogo vremeni

DEĞERLENDİRİCİLER ARASI GÜVENİLİRLİK VE TATMİN BAĞLAMINDA 360 DERECE PERFORMANS DEĞERLENDİRME - 360-DEGREE PERFORMANCE APPRAISAL IN THE CONTEXT OF INTERRATER RELIABILITY AND SATISFACTION

Directory of Open Access Journals (Sweden)

Adem BALTACI

2014-03-01

Full Text Available ÖzetGünümüzün en popüler değerlendirme sistemi olarak kabul edilen 360 derece değerlendirme sistemi gücünü, farklı kaynaklardan elde edilecek olan sonuçların daha objektif ve kapsayıcı olacağı görüşünden almaktadır. Ancak burada hangi değerlendiricinin daha geçerli ve güvenilir bilgi sağladığı halen belirsizliğini koruyan bir konudur. Bu belirsizliğe rağmen 360 derece değerlendirme sistemi çalışana kendini ve diğerlerini değerlendirme şansı tanıyor olması nedeniyle sistemden duyulan tatmini arttırmaktadır. Bu bağlamda yapılan bu çalışmada, değerlendirme sisteminden duyulan tatmin ve değerlendiriciler arası güvenilirlik özelinde 360 derece değerlendirme sistemi ele alınmıştır. Bu amaçla bu sistemi uygulayan bir işletmenin çalışanlarının değerlendirme sonuçları incelenmiş ve ayrıca çalışanlara sistemden duydukları tatmini ölçen bir anket uygulanmıştır. Analizler sonucunda demografik değişkenlerin performans puanları üzerinde olmasa da farklı kaynaklardan gelen değerlendirmeler üzerinde etkili olabildiği görülmüştür. Ayrıca üstlerin çalışanların gerçek performans puanlarına en yakın değerlendirmeleri yaptığı incelemeler sonucunda ortaya çıkmıştır. Bunun yanı sıra sisteme karşı duyulan tatmin ile çalışanların performansları arasında kuvvetli bir ilişki tespit edilmiştir.AbstractThe 360-degree appraisal system, viewed as today’s most popular appraisal system, gets its strength from the view that results from different sources would be much more objective and inclusive. Yet, the question of exactly which rating source provides relatively more valid and reliable information remains to be answered. This uncertainty notwithstanding, the 360-degree performance appraisal system leads to higher satisfaction with the system as it allows employees to assess both themselves and others. Against this background, this study addresses the

EKOLOGIJA LESENE GRADNJE

OpenAIRE

Kuhelnik, Lidija

2011-01-01

Diplomska naloga obravnava sisteme lesene montažne gradnje. Opisani so vsi trije sistemi, torej skeletni, okvirni in masivni. Obravnavani so lesni kompoziti za konstrukcije. V nadaljevanju je obravnavana gradbena biologija in zelena trajnostna gradnja. Podrobno je opisana zdrava hiša in njeni materiali. Predstavljen je tudi sindrom nezdrave zgradbe. Opisana je konstrukcijska zaščita lesa in modifikacija lesa.

Meccanica applicata

CERN Document Server

Timoshenko, Stephen

1957-01-01

Statica : principi di statica, forze complanari concorrenti, forze complanari parallele, forze complanari nel caso generale, sistemi di forze nello spazio, principio dei lavori virtuali ; Dinamica : principi di dinamica, traslazione rettilinea, traslazione curvilinea, rotazione di un corpo rigido intorno a un asse fisso, moto piano di un corpo rigido, moto relativo, momenti d'inerzia di figure piane, momenti d'inerzia di corpi materiali.

Legami 2.0. Il genere alla prova della contemporaneità

Directory of Open Access Journals (Sweden)

Redazione Camera blu

2016-12-01

Full Text Available Numero a cura di Anna Gargiulo. Il numero guarda alle trasformazioni che attengono al genere femminile che vanno oggi configurandosi nel virtuale, nei media, nelle sfide della società contemporanea rivolte ai corpi, alle famiglie, ai sistemi accademici. Si parte dai legami, dai link, che tanto possono connettere paesi e generazioni quanto legare oppressivamente l’altro a sé.

Assembly of finite element methods on graphics processors

KAUST Repository

Cecka, Cris; Lew, Adrian J.; Darve, E.

2010-01-01

in assembling and solving sparse linear systems with NVIDIA GPUs and the Compute Unified Device Architecture (CUDA) are created and analyzed. Multiple strategies for efficient use of global, shared, and local memory, methods to achieve memory coalescing

An automatic way of finding robust elimination trees for a multi-frontal sparse solver for radical 2D hierarchical meshes

KAUST Repository

AbouEisha, Hassan M.; Gurgul, Piotr; Paszyńska, Anna; Paszyński, Maciej R.; Kuźnik, Krzysztof M.; Moshkov, Mikhail

2014-01-01

computational cost as well as heuristic parallel multi-frontal direct solver algorithm resulting in a logarithmic computational cost. The resulting parallel algorithm is implemented on NVIDIA CUDA GPU architecture based on our graph-grammar approach. © 2014

Application of radioisotopes to studies of crystal imperfections; Application des radioisotopes a l'etude des imperfections des cristaux; Primenenie radioizotopov dlya izucheniya defektov v kristallakh; Aplicaciones de los radioisotopos al estudio de las imperfecciones cristalinas

Energy Technology Data Exchange (ETDEWEB)

Sproull, R L; Slack, G A; Moss, M; Pohl, R O; Krumhansl, J A [Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, NY (United States)

1962-01-15

indicadores anadidos. La segunda aplicacion consiste en introducir en los haluros alcalinos pequenas cantidades de iones-impureza a fin de poder estudiar la dispersion de fonones causada por dichas impurezas, o por los huecos que crean en la red cristalina; los autores efectuan las mediciones correspondientes a temperaturas muy bajas, ya que en tales condiciones las imperfecciones de la red imponen limitaciones al libre recorrido medio de los fonones. En estos trabajos han empleado generalmente el radioisotopo {sup 45}Ca. Los autores pasan revista a los resultados de su labor, citan algunas aplicaciones actuales de los radioisotopos en este campo y formulan observaciones sobre sus posibles aplicaciones en lo futuro. (author) [Russian] Radioizotopy byli ispol'zovany v dvukh vazhnykh napravleniyakh dlya izucheniya defektov v shchelochnykh galoidnykh kristallakh. Zonal'noe rafinirovanie soedinenij proveryalos' izotopnymi indikatorami, a koehffitsienty izolyatsii opredelyalis' iz poluchennykh dannykh. Drugoe primenenie zaklyuchalos' v vvedenii nebol'shikh kontsentratsij primesej ionov v shchelochnye galoidy s tem, chtoby izuchit' rasseyanie fononov takimi defektami ili vakansiyami, imi vyzyvaemymi; ehti izmereniya proizvodyatsya pri ochen' nizkikh temperaturakh, pri kotorykh srednyaya velichina svobodnogo probega fonona ogranichivaetsya defektami reshetki. Radioizotopom, poluchivshim naibolee shirokoe primenenie, yavlyaetsya kal'tsij-45. (author)

Application of tritiated water as a tracer for quantitative determination of water flow distribution in an oil-field; Emploi de l'eau tritiee comme indicateur pour l'etude quantitative de la repartition des eaux dans un champ petrolifere; Primenenie nasyshchennoj tritiem vody v kachestve mechenogo atoma dlya kolichestvennogo opredeleniya raspredeleniya potoka vody v neftyanom pole; Empleo del agua tritiada como trazador en la determinacion cuantitativa de la distribucion del flujo de agua en un campo petrolifero

Energy Technology Data Exchange (ETDEWEB)

Kuyper, E; Hofstra, A [Koninklijke/Shell-Laboratorium, Amsterdam (Netherlands); Nauta, H [Koninklijke/Shell Exploratie-En Produktie-Laboratorium (Netherlands)

1962-01-15

yacimiento petrolifero, se inyecto agua tritiada en uno de los pozos y, seguidamente, se determino la cantidad de tritio presente en el agua extraida de los pozos circundantes. Como la radiactividad especifica del agua procedente de los pozos mas alejados parecia ser relativamente baja, debido en parte a la dilucion del agua tritiada por el agua presente en la formacion geologica, se aplicaron metodos de enriquecimiento con miras a aumentar la sensibilidad del recuento. Se estudiaron los tres metodos siguientes: intercambio con etanol, transformacion en tolueno y electrolisis. Este ultimo metodo resulto ser el mas util. El tritio se determino con un contador de centelleo liquido; la sustancia de centelleo, en la que se disolvio la muestra de agua, consistio en una mezcla de tolueno y etanol (2:1) adicionado de DPO y POPOP. (author) [Russian] Dlya togo, chtoby izuchit' techenie vody v podzemnom neftyanom rezervuare, byla pushchena nasyshchennaya tritiem voda v skvazhinu, i vposledstvii tritij byl obnaruzhen v vode, vzyatoj iz okruzhayushchikh kolodtsev. Poskol'ku udel'naya radioaktivnost' vody, vzyatoj iz bolee otdalennykh kolodtsev, yavlyaetsya, kak kazhetsya, dovol'no nizkoj, otchasti blagodarya razzhizheniyu nasyshchennoj tritiem vody, vodoj, nakhodyashchejsya v obrazovanii, byli ispol'zovany metody obogashcheniya dlya togo, chtoby uvelichit' raschetnuyu chuvstvitel'nost'. Byli izucheny tri metoda obogashcheniya: obmen s ehtanolom, konversiya v toluol i ehlektroliz. Poslednij metod okazalsya naibolee poleznym. Tritij byl obnaruzhen pri pomoshchi zhidkostnogo stsintillyatsionnogo schetchika; stsintillyatsionnyj material sostoyal iz smesi toluola s ehtanolom (2:1) s DPO i ROROR; voda byla rastvorena v ehtoj zhidkosti. Kratko rassmotreny nekotorye statisticheskie problemy v svyazi s minimal'no izmeryaemoj udel'noj aktivnost'yu i umen'sheniem fona. (author)

Construction and Operation of a Commercial Gamma-Ray Package-Sterilizing Plant; Construction et fonctionnement d'une installation industrielle pour la sterilisation d'articles sous emballage par les rayons gamma; Razrabotka i ehkspluatatsiya sbornoj ustanovki gamma-izlucheniya promyshlennogo tipa dlya sterilizatsii meditsinskikh materialov; Construccion y funcionamiento de una instalacion industrial para la esterilizacion gamma de articulos medicos empaquetados

Energy Technology Data Exchange (ETDEWEB)

Crawford, C. G. [Johnson' s Ethical Plastics Ltd., Slough (United Kingdom)

1963-11-15

'installation dans une unite d e production exploitee par une entreprise commerciale et la bacteriologie. Il etudie brievement la rentabilite de la sterilisation par les rayons gamma et examine quelles sont les autres possibilites d'utilisation d'une installation de cette nature. (author) [Spanish] En la memoria se describe una instalacion de esterilizacion a base de {sup 60}Co, explotada comercialmente por la Johnson's Ethical Plastics Limited en Slough (Reino Unido). Se trata de una instalacion de tratamiento continuo totalmente automatica equipada con una fuente de 72 000 c. Aprovechando la experiencia adquirida por la Junta de Energfa Atomica del Reino Unido en su Package Irradiation Plant de Wantage, dicha instalacion fue concebida para esterilizar jeringas de material plastico y otros articulos medicos no recuperables de analoga densidad aparente. La instalacion viene funcionando desde noviembre de 1962. En la memoria se indican las principales caracteristicas de construccion, en especial los dispositivos para la seguridad del personal, y el metodo de carga de las varillas de cobalto. Se describe la experiencia adquirida, en particular en lo que atauee a la dosimetria, la integracion de la instalacion en el proceso productivo de una empresa comercial y los resultados bacteriologicos. Por ultimo, se examinan brevemente los aspectos economicos de la esterilizacion por irradiacion gamma y se evaluan las posibles aplicaciones de una instalacion de este tipo en el futuro. (author) [Russian] Tsel' nastoyashchej stat'i - opisanie ustanovki dlya oblucheniya s pomoshch'yu Co{sup 60}, na kotoroj v nastoyashchee vremya proizvoditsya v promyshlennykh masshtabakh sterilizatsiya meditsinskikh materialov (firma ''Dzhonsons ehtikal plastike'' v Slou, Angliya). Ustanovka nepreryvnogo dejstviya snabzhena istochnikom v 72 000 kyuri; vse operatsii polnost'yu avtomatizirovany. Na osnove opyta, poluchennogo v ehtoj oblasti pri ehkspluatatsii sbornoj radiatsionnoj ustanovki v Uontidzhe (pri

Optimalizace platformy pro distribuované výpočty Hadoop

OpenAIRE

Čecho, Jaroslav

2012-01-01

Tato diplomová práce se zabývá možnostmi optimalizace frameworku Hadoop za pomocí platformy CUDA. Apache Hadoop je frameworku umožnující analýzu obrovských objemů dat. Obsahuje distribuovaný souborový systém a implementaci programovacího paradigmatu mapreduce s jehož pomocí se poté píší uživatelské aplikace. Platforma CUDA firmy NVIDIA umožnuje využít výkon grafické karty počítače i k jiným účelům než je generování grafického výstupu na zobrazovací zařízení počítače. Má prace obsahuje seznam ...

Implementation techniques and acceleration of DBPF reconstruction algorithm based on GPGPU for helical cone beam CT

International Nuclear Information System (INIS)

Shen Le; Xing Yuxiang

2010-01-01

The derivative back-projection filtered algorithm for a helical cone-beam CT is a newly developed exact reconstruction method. Due to its large computational complexity, the reconstruction is rather slow for practical use. General purpose graphic processing unit (GPGPU) is an SIMD paralleled hardware architecture with powerful float-point operation capacity. In this paper,we propose a new method for PI-line choice and sampling grid, and a paralleled PI-line reconstruction algorithm implemented on NVIDIA's Compute Unified Device Architecture (CUDA). Numerical simulation studies are carried out to validate our method. Compared with conventional CPU implementation, the CUDA accelerated method provides images of the same quality with a speedup factor of 318. Optimization strategies for the GPU acceleration are presented. Finally, influence of the parameters of the PI-line samples on the reconstruction speed and image quality is discussed. (authors)

Genetic particle swarm parallel algorithm analysis of optimization arrangement on mistuned blades

Science.gov (United States)

Zhao, Tianyu; Yuan, Huiqun; Yang, Wenjun; Sun, Huagang

2017-12-01

This article introduces a method of mistuned parameter identification which consists of static frequency testing of blades, dichotomy and finite element analysis. A lumped parameter model of an engine bladed-disc system is then set up. A bladed arrangement optimization method, namely the genetic particle swarm optimization algorithm, is presented. It consists of a discrete particle swarm optimization and a genetic algorithm. From this, the local and global search ability is introduced. CUDA-based co-evolution particle swarm optimization, using a graphics processing unit, is presented and its performance is analysed. The results show that using optimization results can reduce the amplitude and localization of the forced vibration response of a bladed-disc system, while optimization based on the CUDA framework can improve the computing speed. This method could provide support for engineering applications in terms of effectiveness and efficiency.

GPU Accelerated Chemical Similarity Calculation for Compound Library Comparison

Science.gov (United States)

Ma, Chao; Wang, Lirong; Xie, Xiang-Qun

2012-01-01

Chemical similarity calculation plays an important role in compound library design, virtual screening, and “lead” optimization. In this manuscript, we present a novel GPU-accelerated algorithm for all-vs-all Tanimoto matrix calculation and nearest neighbor search. By taking advantage of multi-core GPU architecture and CUDA parallel programming technology, the algorithm is up to 39 times superior to the existing commercial software that runs on CPUs. Because of the utilization of intrinsic GPU instructions, this approach is nearly 10 times faster than existing GPU-accelerated sparse vector algorithm, when Unity fingerprints are used for Tanimoto calculation. The GPU program that implements this new method takes about 20 minutes to complete the calculation of Tanimoto coefficients between 32M PubChem compounds and 10K Active Probes compounds, i.e., 324G Tanimoto coefficients, on a 128-CUDA-core GPU. PMID:21692447

Stime della biomassa marina attraverso il metodo acustico: discernimento delle specie e gestione delle risorse ittiche - Acoustical estimation of fish biomass: species identification and stocks management

Directory of Open Access Journals (Sweden)

Víctor Espinosa

2015-09-01

Full Text Available L’acustica è alla base delle più importanti tecnologie nelle telecomunicazioni subacquee, nonché nel rilevamento e nella determinazione dei target acustici nei mezzi acquatici. Le misure a multi-frequenza sono lo strumento principale per l’identificazione selettiva delle specie marine e per la pesca sostenibile. Lo sviluppo di sistemi a larga banda larga e le tecniche basate su sonar multi-beam costituiscono l'attuale sfida per gli scienziati e gli sviluppatori. Al contempo, sistemi più semplici ed economicamente efficienti, come boe satellitari, sono in grado di offrire informazioni per il monitoraggio degli ecosistemi o l’individuazione di specie bersaglio nella pesca marittima. ------ Acoustics is the basics of the most important technologies for underwater telecommunication, as well as for target detection and identification in the aquatic media. Multiple frequency measurements are the key for species discrimination and open the door for sustainable fisheries. The development of wider broadband systems and quantitative multi-beam sonars and processing techniques constitute the present challenge for scientists and developers. In parallel, simpler and cost-efficient systems like satellite buoys can offer clue information for marine ecosystem monitoring or target species fisheries.

GPU-based normalized cuts for road extraction using satellite imagery

Indian Academy of Sciences (India)

on the framework NVIDIA CUDA. Apart from the ... quality and to generate the elongated road network for further ... the framework of normalized cuts introduced by. Shi and Malik ..... Youn J and Bethel J S 2004 Adaptive snakes for urban.

Enabling High Performance Large Scale Dense Problems through KBLAS

KAUST Repository

Abdelfattah, Ahmad; Keyes, David E.; Ltaief, Hatem

2014-01-01

KBLAS (KAUST BLAS) is a small library that provides highly optimized BLAS routines on systems accelerated with GPUs. KBLAS is entirely written in CUDA C, and targets NVIDIA GPUs with compute capability 2.0 (Fermi) or higher. The current focus

GPU-Accelerated Stony-Brook University 5-class Microphysics Scheme in WRF

Science.gov (United States)

Mielikainen, J.; Huang, B.; Huang, A.

2011-12-01

The Weather Research and Forecasting (WRF) model is a next-generation mesoscale numerical weather prediction system. Microphysics plays an important role in weather and climate prediction. Several bulk water microphysics schemes are available within the WRF, with different numbers of simulated hydrometeor classes and methods for estimating their size fall speeds, distributions and densities. Stony-Brook University scheme (SBU-YLIN) is a 5-class scheme with riming intensity predicted to account for mixed-phase processes. In the past few years, co-processing on Graphics Processing Units (GPUs) has been a disruptive technology in High Performance Computing (HPC). GPUs use the ever increasing transistor count for adding more processor cores. Therefore, GPUs are well suited for massively data parallel processing with high floating point arithmetic intensity. Thus, it is imperative to update legacy scientific applications to take advantage of this unprecedented increase in computing power. CUDA is an extension to the C programming language offering programming GPU's directly. It is designed so that its constructs allow for natural expression of data-level parallelism. A CUDA program is organized into two parts: a serial program running on the CPU and a CUDA kernel running on the GPU. The CUDA code consists of three computational phases: transmission of data into the global memory of the GPU, execution of the CUDA kernel, and transmission of results from the GPU into the memory of CPU. CUDA takes a bottom-up point of view of parallelism is which thread is an atomic unit of parallelism. Individual threads are part of groups called warps, within which every thread executes exactly the same sequence of instructions. To test SBU-YLIN, we used a CONtinental United States (CONUS) benchmark data set for 12 km resolution domain for October 24, 2001. A WRF domain is a geographic region of interest discretized into a 2-dimensional grid parallel to the ground. Each grid point has

Mostra didattico-divulgativa: Dentro il Microscopio. Ottica, immagini, tecnologie

OpenAIRE

Andronico, Patrizia

2011-01-01

Progettazione grafica e realizzazione dei pannelli della mostra.Elenco dei pannelli sull'ottica geometrica:l'occhio umanol'ottica geometricala riflessione e la rifrazionegli elementi di un sistema otticola formazione dell'immaginela lente di ingrandimentola risoluzione e la riffrazioneil microscopio otticoElenco dei pannelli sulla storia della microscopia:i primi sistemi di ingrandimentoocchiali medievalil'invenzione del microscopiogalileo e i linceihooke e la royal societynasce la microbiolo...

Poenostavljen sistem za samodejno bočno parkiranje

OpenAIRE

ŠTROS, MATIC

2014-01-01

Diplomsko delo prikazuje poenostavljen sistem bočnega parkiranja na modelu vozila. Sistemi za bočno parkiranje se že pojavljajo v avtomobilski industriji in so zmožni detekcije praznega parkirnega mesta ter vožnje v parkirni prostor. Prednost takega sistema, vgrajenega v vozilo, je v tem, da lajša bočno parkiranje, ki ga mnogi neizkušeni vozniki ne obvladajo.

Sailfish: A flexible multi-GPU implementation of the lattice Boltzmann method

Science.gov (United States)

Januszewski, M.; Kostur, M.

2014-09-01

We present Sailfish, an open source fluid simulation package implementing the lattice Boltzmann method (LBM) on modern Graphics Processing Units (GPUs) using CUDA/OpenCL. We take a novel approach to GPU code implementation and use run-time code generation techniques and a high level programming language (Python) to achieve state of the art performance, while allowing easy experimentation with different LBM models and tuning for various types of hardware. We discuss the general design principles of the code, scaling to multiple GPUs in a distributed environment, as well as the GPU implementation and optimization of many different LBM models, both single component (BGK, MRT, ELBM) and multicomponent (Shan-Chen, free energy). The paper also presents results of performance benchmarks spanning the last three NVIDIA GPU generations (Tesla, Fermi, Kepler), which we hope will be useful for researchers working with this type of hardware and similar codes. Catalogue identifier: AETA_v1_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AETA_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: GNU Lesser General Public License, version 3 No. of lines in distributed program, including test data, etc.: 225864 No. of bytes in distributed program, including test data, etc.: 46861049 Distribution format: tar.gz Programming language: Python, CUDA C, OpenCL. Computer: Any with an OpenCL or CUDA-compliant GPU. Operating system: No limits (tested on Linux and Mac OS X). RAM: Hundreds of megabytes to tens of gigabytes for typical cases. Classification: 12, 6.5. External routines: PyCUDA/PyOpenCL, Numpy, Mako, ZeroMQ (for multi-GPU simulations), scipy, sympy Nature of problem: GPU-accelerated simulation of single- and multi-component fluid flows. Solution method: A wide range of relaxation models (LBGK, MRT, regularized LB, ELBM, Shan-Chen, free energy, free surface) and boundary conditions within the lattice

Contribution of the mobile remote sensing laboratory to the 16. Antarctic expedition. Preliminary results; 16. Campagna oceanografica antartica. Attivita' del laboratorio di telerilevamento laser

Energy Technology Data Exchange (ETDEWEB)

Colao, F.; Fantoni, R.; Palucci, A. [ENEA, Dipartimento Innovazione, Centro Ricerche Frascati, Rome (Italy)

2001-07-01

The ENEA mobile fluorosensor laboratory has successfully joined the oceanographic campaign in the frame of the 16. Italian Antarctic expedition with the R/V Italica, Jan-Feb'01. The remote and local instruments have been operated during the transferring transect from/to New Zealand and the Antarctic Ross sea. Two lidar fluorosensors have been used for a continuous monitoring, the external one for a superficial inspection and the second, installed on the craft keel, operated in the range resolved mode. The main spectral channels recorded correspond to the phytoplankton fluorescence (Chlorophylla; Chl-a) and to the chromophoric dissolved organic matter (CDOM). In order to complete and calibrate the remote sensed data, in-situ analyses have been performed with local instruments, on sampled seawaters and filters have been stored for successive analyses in Italy. Lidar and local preliminary data are presented in thematic maps together with the seasonal parameters monitored during the oceanographic campaign. [Italian] Il laboratorio mobile lidar fluorosensore ha partecipato con successo alla campagna oceanografica nell'ambito della 16. spedizione antartica coon i propri sistemi di monitoraggio laser remoti e con la strumentazione di corredo. Due lidar fluorosensori, uno esterno e l'altro montato a scafo, sono stati utilizzati per un monitoraggio, continuo superficiale nel primo caso e range resolved nel secondo, lungo tutto il percorso effettuato dalla M/N Italica durante i transetti di trasferimento da e verso la Nuova Zelanda e attraverso il mare di Ross. I canali spettrali principali registrati corrispondono alla fluorescenza del fitoplancton e della sostanza organica disciolta. Per la taratura dei sistemi remoti e per completare l'analisi delle acque attraversate, sono state effettuate misure locali, filtrazioni e determinazioni allo spettrofluorimetro e al PAM, sono state effettuate per la taratura dei sistemi remoti e per completare l

Soil less culture; I sistemi di coltivazione senza suolo

Energy Technology Data Exchange (ETDEWEB)

Martignon, G [ENEL DSR, Centro Ricerche Ambiente e Materiali, Milan (Italy); Venezia, A [MIRAAF, Istituto Sperimentale per l` Orticultura (Italy) Sezione di Montanaso Lombardo

1996-01-01

The paper gives a general view of techniques and systems related to soil less culture developed in the last years (on substrate in beg; NFT; Ebb-Flood, aeroponic,..) taking into account their management and problems (water quality, control of plant nutrition and irrigation; substrates; pathological aspects,..). The evolution, now in progress, of soil less culture from open to closed system as a way to realized an environmental friendly growing system, is considered. When plants are grown with open cycle techniques a large amount of waste solution, with an a high content of nutrients, are discharged in soil and water. Furthermore, they need an extra-utilization of water and fertilizers. Another aspect is the utilization of low cost substrates, which can be reused for more than one cultural cycle without negative effects on yield, and also finally discharged without negative effects on the environment. The development of soil less culture in countries, such as Italy, where only in the last few years the growers show an increasing attention to these new growing systems, is strongly depending on a improvement of research activities, to obtain growing techniques at low cost, easy to manage, able to give good yield and quality. At the same time very useful is a extensive diffusion of scientific results, joined together with the availability of a technical support for the growers.

Sistemi e autopoiesi nella musica elettronica su nastro magnetico

Directory of Open Access Journals (Sweden)

Luca Cossettini

2014-02-01

Full Text Available With the development of sound production and processing technologies, composers' private rooms stopped delimiting the boundaries of musical creativity, which started inhabiting recording studios instead. Here memory, traditionally entrusted to paper and to the silence of the musical text, met a technology that enabled to record sounds directly, thus achieving the acoustic fulfilment of the composer's thought. The crystalline abstraction of musical notation gave way to a world of sounds submerged in noise as well as in human and technological indeterminacy: it is a world that requires specific control strategies and direct confrontation with performance practices and listening within a complex system. Composers were tossed into this system, becoming performers and active observers of their own work. Thus, the linearity of Shannon’s model of communication was altered. In his works on musical semiology, Jean-Jacques Nattiez had already modified the model from Sender -> Message -> Receiver to Poietic dimension -> Trace <- Esthesic dimension. The rise of the composer as an active observer requires a new transformation of the model of communication, creating a continuous feedback between the different elements. This feedback will often involve the listener as well. The electronic music work can therefore be seen as a self-organizing system that includes in itself the electronic devices as well as the human factor that operates them. In this system, compositional models are the invariants that vouch for the identity and recognisability of the work.

Informacioni sistemi u upravljanju rizicima u životnoj sredini

Directory of Open Access Journals (Sweden)

Dejan Inđić

2013-02-01

Full Text Available Normal 0 MicrosoftInternetExplorer4 Sažetak: Zemljotresi, poplave, nuklearni i hemijski akcidenti, zagađivanje vazduha, zemljišta i voda, ukazuju na sve veće prisustvo nesreća nastalih intenzivnim razvojem i često nekontrolisanom primenom tehnološkog razvoja. Pred društvo se postavlja problem kako se što bolje pripremiti, kako obezbediti veću usklađenost i funkcionisanje aktivnosti i mera za sprečavanje nastanka akcidentnih situacija i kako uneti promene u društveni i tehnološki razvoj koje će ići u korist prirode, ali i za dobrobit budućih generacija. U radu je prikazano korišćenje različitih informacionih sistema (IS u upravljanju rizicima u životnoj sredini i predlog za izradu jedinstvenog IS u Republici Srbiji.

Full Chain Benchmarking for Open Architecture Airborne ISR Systems: A Case Study for GMTI Radar Applications

Science.gov (United States)

2015-09-15

languages targeting graphics processors [1]. Examples include the CUDA APIs for development on NVIDIA devices, and the more portable OpenCL APIs which...offered by NVIDIA for programming their GPU products. OpenVPX is a switched fabric standard developed specifically for high-performance

Advanced Technologies in Safe and Efficient Operating Rooms

Science.gov (United States)

2009-02-01

NVIDIA 8800 GTX GPU using CUDA(Compute Unified Device Architecture). Several studies in the recent past have reported computing forward and back...weaknesses, opportunities, and threats analysis (known in business intelligence parlance as a SWOT analysis) to classify their observations. Strengths Our Web

Comparative Study of Neural Network Frameworks for the Next Generation of Adaptive Optics Systems.

Science.gov (United States)

González-Gutiérrez, Carlos; Santos, Jesús Daniel; Martínez-Zarzuela, Mario; Basden, Alistair G; Osborn, James; Díaz-Pernas, Francisco Javier; De Cos Juez, Francisco Javier

2017-06-02

Many of the next generation of adaptive optics systems on large and extremely large telescopes require tomographic techniques in order to correct for atmospheric turbulence over a large field of view. Multi-object adaptive optics is one such technique. In this paper, different implementations of a tomographic reconstructor based on a machine learning architecture named "CARMEN" are presented. Basic concepts of adaptive optics are introduced first, with a short explanation of three different control systems used on real telescopes and the sensors utilised. The operation of the reconstructor, along with the three neural network frameworks used, and the developed CUDA code are detailed. Changes to the size of the reconstructor influence the training and execution time of the neural network. The native CUDA code turns out to be the best choice for all the systems, although some of the other frameworks offer good performance under certain circumstances.

Paralelización del Algoritmo Criptográfico GOST Empleando el Paradigma de Memoria Compartida

Directory of Open Access Journals (Sweden)

Marlis Fulgueira-Camilo

2015-06-01

Full Text Available El artículo refiere el proceso de paralelización del algoritmo criptográfico GOST. La investigación realizada persigue como objetivo, reducir el tiempo de ejecución del algoritmo. El estudio no se encuentra enfocado al análisis de fortaleza del algoritmo criptográfico, donde se hace énfasis es en el método empleado para disminuir el tiempo de ejecución de los procesos cifre y descifre. Para ello se realiza un diseño paralelo basado en la metodología de Ian Foster, el cual es aplicado a dos implementaciones usando técnicas como: OpenMP y CUDA. Las comparaciones realizadas teniendo en cuenta, tanto al algoritmo secuencial como las implementaciones paralelas, demuestran una significativa reducción de tiempo, sin importar la técnica empleada. El mejor resultado se logra empleando CUDA.

A GPU-accelerated semi-implicit fractional-step method for numerical solutions of incompressible Navier-Stokes equations

Science.gov (United States)

Ha, Sanghyun; Park, Junshin; You, Donghyun

2018-01-01

Utility of the computational power of Graphics Processing Units (GPUs) is elaborated for solutions of incompressible Navier-Stokes equations which are integrated using a semi-implicit fractional-step method. The Alternating Direction Implicit (ADI) and the Fourier-transform-based direct solution methods used in the semi-implicit fractional-step method take advantage of multiple tridiagonal matrices whose inversion is known as the major bottleneck for acceleration on a typical multi-core machine. A novel implementation of the semi-implicit fractional-step method designed for GPU acceleration of the incompressible Navier-Stokes equations is presented. Aspects of the programing model of Compute Unified Device Architecture (CUDA), which are critical to the bandwidth-bound nature of the present method are discussed in detail. A data layout for efficient use of CUDA libraries is proposed for acceleration of tridiagonal matrix inversion and fast Fourier transform. OpenMP is employed for concurrent collection of turbulence statistics on a CPU while the Navier-Stokes equations are computed on a GPU. Performance of the present method using CUDA is assessed by comparing the speed of solving three tridiagonal matrices using ADI with the speed of solving one heptadiagonal matrix using a conjugate gradient method. An overall speedup of 20 times is achieved using a Tesla K40 GPU in comparison with a single-core Xeon E5-2660 v3 CPU in simulations of turbulent boundary-layer flow over a flat plate conducted on over 134 million grids. Enhanced performance of 48 times speedup is reached for the same problem using a Tesla P100 GPU.

High-performance method of morphological medical image processing

Directory of Open Access Journals (Sweden)

Ryabykh M. S.

2016-07-01

Full Text Available the article shows the implementation of grayscale morphology vHGW algorithm for selection borders in the medical image. Image processing is executed using OpenMP and NVIDIA CUDA technology for images with different resolution and different size of the structuring element.

La struttura del nucleo

CERN Document Server

Eisenbud, Leonard

1960-01-01

Caratteristiche generali dei nuclei ; sistematica dei nuclei stabili, dettagli sulle superfici di energia di legame ; proprietà degli stati nucleari : stati fondamentali ; generalità sulle reazioni nucleari ; sistemi di due corpi, interazioni fra nucleoni ; modelli nucleari, il modello uniforme ; modelli nucleari, modelli a particelle indipendenti ; modelli nucleari, modelli a più particelle ; reazioni nucleari, utri ravvicinati ; reazioni nucleari, reazioni di superficie ; interazione con campi elettrone-neutrino ; transizioni elettromagnetiche in nuclei complessi.

Lectures on the Numerical Solution of Partial Differential Equations.

Science.gov (United States)

1981-12-01

Mathematics Rockefeller University Professor F. Brezzi New York, New York 10021 Laboratorio di Analisi Numerica Universita di Pavia Professor Amiram Harten...equations and to control the spacing of the points sj. In the MFE process the grid points move with the solution and cluster atound areas of roughness...149-159. [28] Fichera, G.: Analisi essistenziale per le soluzioni die problemi al contorno misti relativi alle equazione ed ai sistemi di equazioni

Proceedings of the Course on Algorithms and Data Structures for Geometric Computations Held at CISM (Centre International des Sciences Mecaniques) in Udine (Italy) on 8-12 July 1985,

Science.gov (United States)

1985-07-26

Mantica, 3 33100 Udine Italy GAMBOSI Giorgio, Researcher Istituto di Analisi dei Sistemi ed Informatica - CNR Viale A. Manzoni, 30 00185 Roma Italy...cx-cy-plane. the subspace of the location parameters, admoving the cone with vertex at q along L intervals on a long line clustering along the...columns have a semantic meaning besides technical properties such as clustering , avoiding composite keys, and improving performance: They may be used

Accelerated Hierarchical Collision Detection for Simulation using CUDA

DEFF Research Database (Denmark)

Jørgensen, Jimmy Alison; Fugl, Andreas Rune; Petersen, Henrik Gordon

2011-01-01

. The hierarchical nature of the bounding volume structure complicates an efficient implementation on massively parallel architectures such as modern graphics cards and we therefore propose a hybrid method where only box and triangle overlap tests and transformations are offloaded to the graphics card. When...

Performance tuning for CUDA-accelerated neighborhood denoising filters

Energy Technology Data Exchange (ETDEWEB)

Zheng, Ziyi; Mueller, Klaus [Stony Brook Univ., NY (United States). Center for Visual Computing, Computer Science; Xu, Wei

2011-07-01

Neighborhood denoising filters are powerful techniques in image processing and can effectively enhance the image quality in CT reconstructions. In this study, by taking the bilateral filter and the non-local mean filter as two examples, we discuss their implementations and perform fine-tuning on the targeted GPU architecture. Experimental results show that the straightforward GPU-based neighborhood filters can be further accelerated by pre-fetching. The optimized GPU-accelerated denoising filters are ready for plug-in into reconstruction framework to enable fast denoising without compromising image quality. (orig.)

CUDA-accelerated geodesic ray-tracing for fiber-tracking

NARCIS (Netherlands)

van Aart, Evert; Sepasian, N.; Jalba, A.C.; Vilanova, A.

2011-01-01

Diffusion Tensor Imaging (DTI) allows to noninvasively measure the diffusion of water in fibrous tissue. By reconstructing the fibers from DTI data using a fiber-tracking algorithm, we can deduce the structure of the tissue. In this paper, we outline an approach to accelerating such a fiber-tracking

Accelerating wavelet lifting on graphics hardware using CUDA

NARCIS (Netherlands)

Laan, van der W.J.; Roerdink, J.B.T.M.; Jalba, A.C.

2011-01-01

The Discrete Wavelet Transform (DWT) has a wide range of applications from signal processing to video and image compression. We show that this transform, by means of the lifting scheme, can be performed in a memory and computation-efficient way on modern, programmable GPUs, which can be regarded as

Accelerating Wavelet Lifting on Graphics Hardware Using CUDA

NARCIS (Netherlands)

Laan, Wladimir J. van der; Jalba, Andrei C.; Roerdink, Jos B.T.M.

The Discrete Wavelet Transform (DWT) has a wide range of applications from signal processing to video and image compression. We show that this transform, by means of the lifting scheme, can be performed in a memory and computation-efficient way on modern, programmable GPUs, which can be regarded as

Solubility of metallic mercury in organic solvents; Solubilite du mercure metallique dans les solvants organiques; Rastvorimost' metallicheskoj rtuti v organicheskikh rastvoritelyakh; Solubilidad del mercurio metalico en solventes organicos

Energy Technology Data Exchange (ETDEWEB)

Klehr, E H; Voigt, A F [Institute for Atomic Research and Department of Chemistry, Iowa State University, Ames, IA (United States)

1962-03-15

-Myullera ili zhidkikh rassloenij stsintillyatsionnym schetchikom tipa kolodtsa. Vse rastvorimosti byli poryadka (4,6 do 16) x 10{sup -6} gramm-atomov/l. Temperaturnaya zavisimost' rastvorimosti dlya n-dekana, toluola i khlorbenzola opredelyalas' poryadkom ot 0 do 45{sup o}C. Dlya sravneniya k ehtim sistemam primenyalas' teoriya rastvorimosti KHil'debranda-Skotta. Dlya uglevodorodov alifaticheskogo ryada predskazannye teoriej rastvorimosti sostavlyayut 35% tekh, kotorye udalos' nablyudat', no dlya drugikh rastvoritelej predskazannye velichiny yavlyayutsya v 4 - 18 raz bol'she tekh, kotorye prishlos' nablyudat'. Izmenenie teorii daet luchshee soglasovanie dlya odnikh rastvoritelej i khudshee dlya drugikh. Krivye log C (rastvorimost') protiv 1/T byli pryamymi liniyami s naklonami, kotorye skhodny s naklonami teorii KHil'debranda-Skotta, no so smeshcheniem ot ehtikh krivykh. Naklony krivykh ispol'zovalis' dlya vychisleniya tepla i ehntropii rastvora, a ehntropii takzhe vychislyalis' iz krivykh log C protiv log T. Dve serii znachenij ehntropii soglasovyvalis' drug s drugom, a takzhe nakhodilis' v predelakh ot odnogo do chetyrekh edinits ehntropii nailuchshego smesheniya ehntropii. (author)

Real-Time Simulation of Ship-Structure and Ship-Ship Interaction

DEFF Research Database (Denmark)

Lindberg, Ole; Glimberg, Stefan Lemvig; Bingham, Harry B.

2013-01-01

, because it is simple, easy to implement and computationally efficient. Multiple many-core graphical processing units (GPUs) are used for parallel execution and the model is implemented using a combination of C/C++, CUDA and MPI. Two ship hydrodynamic cases are presented: Kriso Container Carrier at steady...

Solving Kinetic Equations on GPU’s

Science.gov (United States)

2011-01-01

7 Acknowledgments 23 8 Appendix: CUDA pseudo-codes 27 ∗Dipartimento di Matematica del Politecnico di Milano Piazza Leonardo da Vinci 32, 20133 Milano...PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) Dipartimento di Matematica del Politecnico di Milano Piazza Leonardo da Vinci 32, 20133 Milano, Italy 8

Auto-tuning Dense Vector and Matrix-vector Operations for Fermi GPUs

DEFF Research Database (Denmark)

Sørensen, Hans Henrik Brandenborg

2012-01-01

applications. As examples, we develop single-precision CUDA kernels for the Euclidian norm (SNRM2) and the matrix-vector multiplication (SGEMV). The target hardware is the most recent Nvidia Tesla 20-series (Fermi architecture). We show that auto-tuning can be successfully applied to achieve high performance...

Adaptation of quantum chemistry software for the electronic structure calculations on GPU for solid-state systems

International Nuclear Information System (INIS)

Gusakov, V.E.; Bel'ko, V.I.; Dorozhkin, N.N.

2015-01-01

We report on adaptation of quantum chemistry software - Quantum Espresso and LASTO - for the electronic structure calculations for the complex solid-state systems on the GeForce series GPUs using the nVIDIA CUDA technology. Specifically, protective covering based on transition metal nitrides are considered. (authors)

Ultraviolet Communication for Medical Applications

Science.gov (United States)

2015-06-01

In the previous Phase I effort, Directed Energy Inc.’s (DEI) parent company Imaging Systems Technology (IST) demonstrated feasibility of several key...accurately model high path loss. Custom photon scatter code was rewritten for parallel execution on a graphics processing unit (GPU). The NVidia CUDA

Smoke simulation for fire engineering using a multigrid method on graphics hardware

DEFF Research Database (Denmark)

Glimberg, Stefan; Erleben, Kenny; Bennetsen, Jens

2009-01-01

interactive physical simulation for engineering purposes, has the benefit of reducing production turn-around time. We have measured speed-up improvements by a factor of up to 350, compared to existing CPU-based solvers. The present CUDA-based solver promises huge potential in economical benefits, as well...

Grammar-Based Multi-Frontal Solver for One Dimensional Isogeometric Analysis with Multiple Right-Hand-Sides

KAUST Repository

Kuźnik, Krzysztof

2013-06-01

This paper introduces a grammar-based model for developing a multi-thread multi-frontal parallel direct solver for one- dimensional isogeometric finite element method. The model includes the integration of B-splines for construction of the element local matrices and the multi-frontal solver algorithm. The integration and the solver algorithm are partitioned into basic indivisible tasks, namely the grammar productions, that can be executed squentially. The partial order of execution of the basic tasks is analyzed to provide the scheduling for the execution of the concurrent integration and multi-frontal solver algo- rithm. This graph grammar analysis allows for optimal concurrent execution of all tasks. The model has been implemented and tested on NVIDIA CUDA GPU, delivering logarithmic execution time for linear, quadratic, cubic and higher order B-splines. Thus, the CUDA implementation delivers the optimal performance predicted by our graph grammar analysis. We utilize the solver for multiple right hand sides related to the solution of non-stationary or inverse problems.

Highly optimized simulations on single- and multi-GPU systems of the 3D Ising spin glass model

Science.gov (United States)

Lulli, M.; Bernaschi, M.; Parisi, G.

2015-11-01

We present a highly optimized implementation of a Monte Carlo (MC) simulator for the three-dimensional Ising spin-glass model with bimodal disorder, i.e., the 3D Edwards-Anderson model running on CUDA enabled GPUs. Multi-GPU systems exchange data by means of the Message Passing Interface (MPI). The chosen MC dynamics is the classic Metropolis one, which is purely dissipative, since the aim was the study of the critical off-equilibrium relaxation of the system. We focused on the following issues: (i) the implementation of efficient memory access patterns for nearest neighbours in a cubic stencil and for lagged-Fibonacci-like pseudo-Random Numbers Generators (PRNGs); (ii) a novel implementation of the asynchronous multispin-coding Metropolis MC step allowing to store one spin per bit and (iii) a multi-GPU version based on a combination of MPI and CUDA streams. Cubic stencils and PRNGs are two subjects of very general interest because of their widespread use in many simulation codes.

A Study on GPU Computing of Bi-conjugate Gradient Method for Finite Element Analysis of the Incompressible Navier-Stokes Equations

International Nuclear Information System (INIS)

Yoon, Jong Seon; Choi, Hyoung Gwon; Jeon, Byoung Jin; Jung, Hye Dong

2016-01-01

A parallel algorithm of bi-conjugate gradient method was developed based on CUDA for parallel computation of the incompressible Navier-Stokes equations. The governing equations were discretized using splitting P2P1 finite element method. Asymmetric stenotic flow problem was solved to validate the proposed algorithm, and then the parallel performance of the GPU was examined by measuring the elapsed times. Further, the GPU performance for sparse matrix-vector multiplication was also investigated with a matrix of fluid-structure interaction problem. A kernel was generated to simultaneously compute the inner product of each row of sparse matrix and a vector. In addition, the kernel was optimized to improve the performance by using both parallel reduction and memory coalescing. In the kernel construction, the effect of warp on the parallel performance of the present CUDA was also examined. The present GPU computation was more than 7 times faster than the single CPU by double precision.

A Study on GPU Computing of Bi-conjugate Gradient Method for Finite Element Analysis of the Incompressible Navier-Stokes Equations

Energy Technology Data Exchange (ETDEWEB)

Yoon, Jong Seon; Choi, Hyoung Gwon [Seoul Nat’l Univ. of Science and Technology, Seoul (Korea, Republic of); Jeon, Byoung Jin [Yonsei Univ., Seoul (Korea, Republic of); Jung, Hye Dong [Korea Electronics Technology Institute, Seongnam (Korea, Republic of)

2016-09-15

A parallel algorithm of bi-conjugate gradient method was developed based on CUDA for parallel computation of the incompressible Navier-Stokes equations. The governing equations were discretized using splitting P2P1 finite element method. Asymmetric stenotic flow problem was solved to validate the proposed algorithm, and then the parallel performance of the GPU was examined by measuring the elapsed times. Further, the GPU performance for sparse matrix-vector multiplication was also investigated with a matrix of fluid-structure interaction problem. A kernel was generated to simultaneously compute the inner product of each row of sparse matrix and a vector. In addition, the kernel was optimized to improve the performance by using both parallel reduction and memory coalescing. In the kernel construction, the effect of warp on the parallel performance of the present CUDA was also examined. The present GPU computation was more than 7 times faster than the single CPU by double precision.

Design and Experimental Evaluation of an Electromagnetic Acceleration System for Fast Safety Rods; Etude Theorique et Experimentale d'un Mecanisme Electromagnetique d'acceleration pour des Barres de Securite; Proektirovanie i ehksperimental'naya otsenka ehlektromagnitnoj sistemy uskoreniya dlya avarijnykh sterzhnej bystrogo dejstviya; Proyecto y Estudio Experimental de un Sistema Electromagnetico de Aceleracion para Barras Rapidas de Seguridad

Energy Technology Data Exchange (ETDEWEB)

Dosch, P.; Kraus, H. -J.; Uhrig, H. [Kernreaktor Bau- und Betriebs-Gesellschaft m.b.H., Karlsruhe, Federal Republic of Germany (Germany)

1964-06-15

rapida de seguridad para un conjunto rapido de potencia nula (SNEAK). Se esta ensayando un prototipo de dicha barra. Los resultados obtenidos hasta ahora han sido muy satisfactorios. (author) [Russian] Sistema avarijnoj zashhity reaktora dolzhna dej stv ov at' s minimal'noj za d erzh k oj , esli ona prednaznachena dlja kontrolja ochen' bystryh otklonenij reaktivnosti. V jelektronnyh chastjah sistemy avarijnoj zashhity mozhno ochen' legko dobit'sja bystrogo srabatyvanija, t o gd a kak sokrashhenie vremeni m ehanicheskogo vysvobozhdenija avarijnogo sterzhnja javljaetsja trudnoj za d a ch ej. Bole etshhatel'nye issledovanija pokazyvajut, chto pomimo nebol'shogo vremeni vysvobozhdenija, preimushhestvo daet vysokaja pervonachal'naja skorost' sterzhnja. Pri odinakovom kolichestve vremeni, zatrach i v a emom na v v edenie st erzh n ja , sterzhni s ravnomernoj skorost'ju n emn ogo p revoshodjat sterzhni s ravnomernym u skoreiem . - Na osnovanii jetih soobrazhenij mozhno schi t a t' , chto impul'snoe u sk oren ie ja vlja etsja pravil'nym metodom vvedenija avarijnyh sterzhnej dlja ustranenija bystryh otklonenij r e aktivnosti, tak kak jeto daet nebol'shuju zaderzhku i obespechivaet vysokuju pervonachal'nuju skorost'. Ustanovleno, chto v avarijnyh sterzhnjah mozhno primenit' jelektromagnitnyj impul'snyj g en er ator. On imeet sledujushhie preimushhestva: a) nebol'shoe kolichestvo komponentov prostoj i prochnoj konstrukcii, kotorye mogut byt' legko vkljucheny v avarijnyj sterzhen', a takzhe mogut byt' skonstruirovany dlja u slovij, sushhestvujushhih okolo aktivnoj zony (vysokie urovni temperatury i izluchenija); b) jen ergi ja , privodjashhaja v dvizhenie sterzhni, akkumuliruetsja v jelek trok on den satore i p o jet om u takzhe mozhet byt' ispol'zovana v sluchae prekrashhenija jenergopitanija; v) konstrukciju legko mozhno prisposobit' k tomu, chtoby ona mogla svobodno i be sp r e pjatstvenno padat' v sluchae prekrashhenija impul'sov. V doklade opisyvajutsja rezul

T. A. Sebeok e i congegni di modellazione del mondo: strumenti teorici al servizio delle pratiche professionali

Directory of Open Access Journals (Sweden)

Giorgio Maggi

2005-06-01

Full Text Available L'elaborato si compone di una parte che comprende l'illustrazione delle linee generali del pensiero teorico di T. A. Sebeok e nello specif ico della sua teoria dei "sistemi di modellazione", e l'altra che include le riflessioni circa la possibilità di adoperare l'approccio biosemiotico alla realtà sociale e costruire, in tale direzione, un professionalismo ideal-tipico che sia capace di rispondere alle esigenze pratiche della vita quotidiana.

Presentazione

OpenAIRE

Ceccatelli Gurrieri, Giovanna

2017-01-01

Gli ultimi tre decenni hanno visto introdurre, nel dibattito sulle scienze sociali e sulla sociologia in particolare, alcuni radicali mutamenti di prospettiva, legati come è noto, in estrema sintesi, a tre principali riferimenti: la teoria dei sistemi, la fenomenologia, l’approccio ermeneutico. Si sono così andati imponendo, insieme al riconoscimento della sostanziale precarietà di ogni tentativo di conoscenza della realtà sociale, alcuni paradigmi che hanno trasformato irreversibilmente i fo...

Criteri e metodi per l’adeguamento prestazionale del patrimonio architettonico degli anni trenta del Novecento. La Facoltà di Ingegneria di Bologna

Directory of Open Access Journals (Sweden)

Riccardo Gulli

2012-12-01

Full Text Available La riflessione su criteri e metodi idonei per il recupero del patrimonio architettonico esistente richiede di incentrare la tematica su azioni che sappiano coniugare l’istanza storica ed estetica con quella dell’innovazione tecnologica; il presente contributo intende mostrare come l’integrazione di componenti impiantistici ed edilizi, unitamente all’adozione di sistemi domotici di controllo e gestione del comfort interno, possa favorire l’adeguamento agli standard attuali pur preservando i caratteri originari.

Riformulazioni, Valorizzazioni e Rifunzionalizzazioni

Directory of Open Access Journals (Sweden)

Gianfranca Ranisio

2014-04-01

Full Text Available   Pratiche del dono e sistemi locali di scambio, beni culturali immateriali, turismo e marketing territoriale, circuiti economici informali e sostenibilità sociale sono questi i temi che intersecano i saggi qui raccolti, nei quali, attraversando aree di confine tra le discipline, si pongono in evidenza sia la dimensione economica e politica che la complessa articolazione tra i livelli micro e macro dei fenomeni  sociali e culturali.  

Tratta internazionale e sfruttamento lavorativo della comunità punjabi in provincia di Latina

Directory of Open Access Journals (Sweden)

Marco Omizzolo

2016-03-01

Full Text Available L'articolo analizza, a partire dai sistemi di tratta internazionale a scopo di sfruttamento lavorativo e caporalato, il caso, originale quanto complesso, della comunità punjabi della provincia di Latina. Uomini e sempre più spesso anche donne costrette a vivere condizioni prossime alla riduzione in schiavitù per via di una consorteria criminale punjabi-pontina composta da trafficanti indiani, caporali, alcuni proprietari di aziende agricole pontine e liberi professionisti.

On nonlinear wave-structure interaction using an immersed boundary method in 2D

DEFF Research Database (Denmark)

Kontos, Stavros; Bingham, Harry B.; Lindberg, Ole

2016-01-01

of a structure. The method obtains an optimum scaling of the solution effort [2] and has been implemented on massively parallel GPU architectures using the CUDA API [3] making it suitable for high resolution flow simulations. This combination of novel and robust numerical methods aims at creating new efficient...

Development of a Semi-Automatic Technique for Flow Estimation using Optical Flow Registration and k-means Clustering on Two Dimensional Cardiovascular Magnetic Resonance Flow Images

DEFF Research Database (Denmark)

Brix, Lau; Christoffersen, Christian P. V.; Kristiansen, Martin Søndergaard

was then categorized into groups by the k-means clustering method. Finally, the cluster containing the vessel under investigation was selected manually by a single mouse click. All calculations were performed on a Nvidia 8800 GTX graphics card using the Compute Unified Device Architecture (CUDA) extension to the C...

Harvesting graphics power for MD simulations

NARCIS (Netherlands)

van Meel, J.A.; Arnold, A.; Frenkel, D.; Portegies Zwart, S.F.; Belleman, R.G.

2008-01-01

We discuss an implementation of molecular dynamics (MD) simulations on a graphic processing unit (GPU) in the NVIDIA CUDA language. We tested our code on a modern GPU, the NVIDIA GeForce 8800 GTX. Results for two MD algorithms suitable for short-ranged and long-ranged interactions, and a

Harvesting graphics power for MD simulations

NARCIS (Netherlands)

Meel, J.A. van; Arnold, A.; Frenkel, D.; Portegies Zwart, S.F.; Belleman, R.G.

We discuss an implementation of molecular dynamics (MD) simulations on a graphic processing unit (GPU) in the NVIDIA CUDA language. We tested our code on a modern GPU, the NVIDIA GeForce 8800 GTX. Results for two MD algorithms suitable for short-ranged and long-ranged interactions, and a

Algorithm of search and track of static and moving large-scale objects

Directory of Open Access Journals (Sweden)

Kalyaev Anatoly

2017-01-01

Full Text Available We suggest an algorithm for processing of a sequence, which contains images of search and track of static and moving large-scale objects. The possible software implementation of the algorithm, based on multithread CUDA processing, is suggested. Experimental analysis of the suggested algorithm implementation is performed.

Introducing 'bones' : a parallelizing source-to-source compiler based on algorithmic skeletons.

NARCIS (Netherlands)

Nugteren, C.; Corporaal, H.

2012-01-01

Recent advances in multi-core and many-core processors requires programmers to exploit an increasing amount of parallelism from their applications. Data parallel languages such as CUDA and OpenCL make it possible to take advantage of such processors, but still require a large amount of effort from

pyPaSWAS : Python-based multi-core CPU and GPU sequence alignment

NARCIS (Netherlands)

Warris, Sven; Timal, N Roshan N; Kempenaar, Marcel; Poortinga, Arne M; van de Geest, Henri; Varbanescu, Ana L; Nap, Jan-Peter

2018-01-01

BACKGROUND: Our previously published CUDA-only application PaSWAS for Smith-Waterman (SW) sequence alignment of any type of sequence on NVIDIA-based GPUs is platform-specific and therefore adopted less than could be. The OpenCL language is supported more widely and allows use on a variety of

Scaling up machine learning: parallel and distributed approaches

National Research Council Canada - National Science Library

Bekkerman, Ron; Bilenko, Mikhail; Langford, John

2012-01-01

... presented in the book cover a range of parallelization platforms from FPGAs and GPUs to multi-core systems and commodity clusters; concurrent programming frameworks that include CUDA, MPI, MapReduce, and DryadLINQ; and various learning settings: supervised, unsupervised, semi-supervised, and online learning. Extensive coverage of parallelizat...

GPU-accelerated atmospheric chemical kinetics in the ECHAM/MESSy (EMAC) Earth system model (version 2.52)

Science.gov (United States)

Alvanos, Michail; Christoudias, Theodoros

2017-10-01

This paper presents an application of GPU accelerators in Earth system modeling. We focus on atmospheric chemical kinetics, one of the most computationally intensive tasks in climate-chemistry model simulations. We developed a software package that automatically generates CUDA kernels to numerically integrate atmospheric chemical kinetics in the global climate model ECHAM/MESSy Atmospheric Chemistry (EMAC), used to study climate change and air quality scenarios. A source-to-source compiler outputs a CUDA-compatible kernel by parsing the FORTRAN code generated by the Kinetic PreProcessor (KPP) general analysis tool. All Rosenbrock methods that are available in the KPP numerical library are supported.Performance evaluation, using Fermi and Pascal CUDA-enabled GPU accelerators, shows achieved speed-ups of 4. 5 × and 20. 4 × , respectively, of the kernel execution time. A node-to-node real-world production performance comparison shows a 1. 75 × speed-up over the non-accelerated application using the KPP three-stage Rosenbrock solver. We provide a detailed description of the code optimizations used to improve the performance including memory optimizations, control code simplification, and reduction of idle time. The accuracy and correctness of the accelerated implementation are evaluated by comparing to the CPU-only code of the application. The median relative difference is found to be less than 0.000000001 % when comparing the output of the accelerated kernel the CPU-only code.The approach followed, including the computational workload division, and the developed GPU solver code can potentially be used as the basis for hardware acceleration of numerous geoscientific models that rely on KPP for atmospheric chemical kinetics applications.

Design of the Small Rods Forming the Fuel Element of the First Charge of the EL4 Reactor. Cladding Problems; Etude des crayons constituant l'element combustible du premier jeu d'EL4 - probleme de la gaine; Problema pokrytiya nebol'shikh steeknej, obrazushchikh toplivnyj ehlement pervoj zagruzki reaktora EL.4; Estudio de las barras que constituyen los elementos combustibles de la primera carga del reactor EL4 - el problema de las vainas

Energy Technology Data Exchange (ETDEWEB)

Bailly, H.; Ringot, C.; Weisz, M. [Centre d' Etudes Nucleaires de Saclay (France)

1963-11-15

) [Spanish] Las vainas de los elementos combustibles de la primera carga del reactor EL-4 son de acero inoxidable. La eleccion del grado del acero y del espesor de la vaina depende de la resistencia a la corrosion y de la resistencia mecanica que se deseen. Las tensiones y las temperaturas de funcionamiento no permiten concebir una vaina que resista durante toda la vida util del elemento combustible si no se uti liza un grado de acero muy resistente y un espesor,superior a 0,5 mm. Se admite que la vaina se adhiera al combustible por fluencia: la deformacion por juego en sentido diametral puede producir una ovalizacion y un pliegue; el juego longitudinal puede dar lugar a flexiones de la vaina. Se han realizado muchos ensayos con vainas de 0,3 a 0,4 mm de espesor para estudiar el modo de deformacion en funcion de los juegos. Para estar seguros de que no se produciran ovaliza ciones con los espesores previstos, y para mantener lo mas baja posible la temperatura en el interior de la barra es preciso eliminar completamente el juego durante la fabricacion. (author) [Russian] Dlya pervoj nagruzki toplivnogo ehlementa reaktora EL.4 ispol'zuetsya pokrytie iz nerzhaveyushchej stali. Vybor splava i tolshchiny pokrytiya svyazan s korrozionnymi i mekhanicheskimi svojstvami metalla. Rabochie napryakheniya i temperatury ne dast vozmokhnosti sproektirovat' pokrytie, stojkoe v techenie vsego sroka sluzhby toplivnogo ehlementa; dlya dostikheniya takoj tseli neobkhodimo bylo by ispol'zovat' ochen' stojkoe pokrytie tolshchinoj bolee 0,5 mm. Dopuskaetsya, chto pokrytie v protsesse spekaniya soedinyaetsya s toplivom. Diametral'noe izmenenie toplivnykh ehlementov mokhet privesti k obrazovaniyu oval'noj formy i nerovnostej; prodol'noe izmenenie sistemy toplivnykh ehlementov mokhet privesti k prodol'nomu izgibu pokrytiya. Byli provedeny mnogochislennye opyty v otnoshenii tolshchiny pokrytiya v predelakh' 0,3 - 0,4 mm s tem, chtoby vyyasnit' kharakter izmeneniya toplivnykh ehlementov v zavisimosti

pyPaSWAS

NARCIS (Netherlands)

Warris, Sven; Timal, N.R.N.; Kempenaar, Marcel; Poortinga, Arne M.; Geest, van de Henri; Varbanescu, Ana L.; Nap, Jan Peter

2018-01-01

Background Our previously published CUDA-only application PaSWAS for Smith-Waterman (SW) sequence alignment of any type of sequence on NVIDIA-based GPUs is platform-specific and therefore adopted less than could be. The OpenCL language is supported more widely and allows use on a variety of hardware

GPU implementation of Bayesian neural network construction for data-intensive applications

International Nuclear Information System (INIS)

Perry, Michelle; Meyer-Baese, Anke; Prosper, Harrison B

2014-01-01

We describe a graphical processing unit (GPU) implementation of the Hybrid Markov Chain Monte Carlo (HMC) method for training Bayesian Neural Networks (BNN). Our implementation uses NVIDIA's parallel computing architecture, CUDA. We briefly review BNNs and the HMC method and we describe our implementations and give preliminary results.

Presenza di Istrice Hystrix cristata negli argini fluviali: problematiche ed esperienze in provincia di Perugia

Directory of Open Access Journals (Sweden)

Luca Convito

2003-10-01

Full Text Available A seguito di danneggiamento di argini fluviali da parte dell?Istrice Hystrix cristata, si è richiesto al Ministero dell?Ambiente il necessario parere alla cattura e traslocazione della specie da tutti i reticoli fluviali in cui si sono avute segnalazioni. Tra novembre 2001 e ottobre 2002 sono state organizzate tre campagne di contenimento nelle seguenti aree: A Alto Tevere umbro; B Lago Trasimeno; C Valle Umbra. Inizialmente sono state adoperate trappole-galleria per Nutria (N, poi integrate o sostituite con modelli appositamente realizzati per Istrice (Is. A danno: otto sistemi di cunicoli in 618 m di argine a ridosso di coltivazioni; periodo d?intervento: 12/XI-19/XII 2001; operatori: n. 2; trappole: n. 10-N; esca: mais, poi mela; notti trappola totale: n. 168; risultato cattura: n. 2 istrici (3,15 ind./mese e n. 1 Nutria (Myocastor coypus; B danno: tre sistemi di cunicoli in 1.540 m di argine pensile; periodo d?intervento: 01/II-17/III 2002; operatori: n. 2; trappole utilizzate: n. 10-Is ?ghigliottina? + n. 1- Is ?modificata?; esca: mela, poi granaglie; notti trappola totale.: n. 224; risultato cattura: n. 7 istrici (4,03 ind./mese e n. 6 nutrie; C danno: oltre venti sistemi di cunicoli in 21.050 m di argini pensili; periodo intervento: 25/VI-25/X 2002; operatori: n.1; trappole: n. 7-Is ?modificate? + n. 9-N; esca: granaglie; notti trappola tot.: n. 641; risultato cattura: n. 1 Istrice (0,4 ind./mese e n. 1 Gatto domestico. Catturando 3-4 ind./mese, si è riusciti a difendere argini ?sensibili? dalla minaccia degli istrici. Determinante è risultato il traslocamento di animali adulti, più legati dei giovani ad un particolare sito e restii pertanto ad abbandonarlo anche se disturbati. Dalle aree A e B sono stati spostati rispettivamente due e tre adulti e, anche se la specie è ancora presente, i punti ?critici? di tali corsi d?acqua non hanno presentato altri problemi. I risultati migliori (sito B si sono ottenuti con l

Grandi Eventi: indicatori di classificazione e incidenza sui sistemi urbani

Directory of Open Access Journals (Sweden)

Giuseppe Mazzeo

2008-08-01

Full Text Available I grandi eventi sono ritenuti una opportunità per le città in quanto sono uno straordinario catalizzatore di investimenti mirati alla trasformazione della città. L’azione dei grandi eventi non è confinata solo nel periodo di svolgimento dell’evento stesso ma si estende ad un periodo molto più ampio, prima e, soprattutto, dopo il suo termine. Nell’organizzazione delle manifestazioni più recenti le trasformazioni urbane hanno interessato in modo sempre maggiore parti già in precedenza urbanizzate, al punto che l’evento diviene l’occasione per trasformare la città costruita e per modificarne il profilo. Il paper approfondisce l’argomento della classificazione degli eventi e del loro impatto sul sistema urbano sviluppandosi in tre parti. Nella prima si analizzano due tipologie di grandi eventi (le esposizioni internazionali e i giochi olimpici con l’obiettivo di pervenire ad una definizione condivisa. Nella seconda parte si identificano i più importanti fattori ed indicatori per l’analisi di questa specifica categoria di avvenimenti. Infine, nella terza parte, si approfondiscono i fattori connessi all’impatto sul sistema urbano e all’organizzazione della sua mobilità. In particolare, viene approfondito il concetto di “effetto pulsar”, ossia gli effetti moltiplicativi sulla evoluzione urbana dipendenti dalla organizzazione di eventi multipli in parallelo o in sequenza. Uno degli elementi più negativi connessi alla organizzazione di un grande evento è la dispersione nel tempo dei benefici acquisiti grazie ad esso; per evitare ciò è necessario che l’evento sia seguito da politiche strategiche continue in modo da preservare i vantaggi acquisiti.

Sistemi riconfigurabili a basso consumo per applicazioni di monitoraggio distribuito

OpenAIRE

Magno, Michele

2010-01-01

The term Ambient Intelligence (AmI) refers to a vision on the future of the information society where smart, electronic environment are sensitive and responsive to the presence of people and their activities (Context awareness). In an ambient intelligence world, devices work in concert to support people in carrying out their everyday life activities, tasks and rituals in an easy, natural way using information and intelligence that is hidden in the network connecting these devices. This pro...

Sistemi museali a confronto: il caso dell’Ateneo di Bologna

Directory of Open Access Journals (Sweden)

Tiziana Maggio

2013-11-01

Full Text Available L’articolo offre una panoramica delle pratiche di gestione e amministrazione del sistema museale dell’Università di Bologna. L'analisi del caso studio è integrata dall'elaborazione di una ipotesi gestionale alternativa, adottata da analoghe realtà museali italiane. 

Fisica dello stato solido

CERN Document Server

Bassani, Franco

2000-01-01

Il volume è un manuale introduttivo allo studio delle proprietà dei materiali cristallini. Mentre gli argomenti trattati sono quelli tipici di un testo di base (diffrazione, bande elettroniche, fononi, proprietà di trasporto, metalli e semiconduttori, proprietà ottiche e magnetiche...), caratteristica peculiare di questa opera che la differenzia da analoghi manuali in lingua italiana e inglese è l'uso intensivo delle proprietà di simmetria dei sistemi in studio ricavate dalla teoria dei gruppi.

Uvajanje sistema poslovne inteligence v koncernu

OpenAIRE

Menard, Nejc

2016-01-01

Skupaj z rastjo poslovnih sistemov raste tudi potreba po ustreznih informacijah o stanju znotraj sistema. V te namene so bili razviti sistemi poslovne inteligence. Ta širok pojem omogoča podjetjem ali organizacijam vpogled v delovanje njihovih kritičnih funkcij skozi orodja za poročila, analizo in vizualizacije. Na podlagi privzetega modela uvajanja informacijskih rešitev smo zapisali usklajene prilagoditve in jih preverili na primeru implementacije rešitve v koncernu Kolektor. S tem spec...

STeP : Sicurezza Tutela e Privacy

OpenAIRE

Carlesi, Carlo

2006-01-01

Organizzazione del corso di formazione sulla sicurezza dei dati e l'applicazione del 'Codice in materia di protezione dei dati personali - D.lgs. 196/2003', 'STeP: Sicurezza Tutela e Privacy'. Il corso, suddiviso in due giornate (di 4 ore) ? stato rivolto principalmente ai respondabili del trattamento dei dati personali, agli addetti al trattamento ed ai responsabili della sicurezza dei sistemi informatici. Il corso si prefigge di fornire un quadro completo della normativa ( D.Lgs. 196/2003) ...

Secondo corso STeP: Sicurezza Tutela e Privacy

OpenAIRE

Carlesi, Carlo

2007-01-01

Organizzazione del secondo corso di formazione sulla sicurezza dei dati e l'applicazione del 'Codice in materia di protezione dei dati personali - D.lgs. 196/2003', 'STeP: Sicurezza Tutela e Privacy'. Il corso, suddiviso in due giornate (di 4 ore) ? stato rivolto principalmente ai respondabili del trattamento dei dati personali, agli addetti al trattamento ed ai responsabili della sicurezza dei sistemi informatici. Il corso si prefigge di fornire un quadro completo della normativa ( D.Lgs. 19...

New counting circuits with E1T tubes; Nouveaux circuits de comptage a tubes E1T; Novye schetnye kontury s lampami E1T; Nuevos circuitos de contaje con valvulas E1T

Energy Technology Data Exchange (ETDEWEB)

Radeka, V [Institut Rudjer Boskovic, Zagreb, Yugoslavia (Croatia)

1962-04-15

continu non stabilise. (author) [Spanish] Se dan soluciones nuevas para circuitos deflectores de haz que permiten montar circuitos contadores sencillos y seguros. La precision con que tiene que ser desviado el haz es deducida por el autor partiendo de investigaciones teoricas del proceso de contaje publicadas anteriormente. Calcula la disminucion de los limites de error en la deflexion que resulta de la diferencia entre las caracteristicas real e ideal de la valvula. Se demuestra que el limite de error en la deflexion es maximo hasta unos 3x10{sup 5} impulsos por segundo, e independiente de la velocidad de contaje, por lo que es posible disenar circuitos mas simples. Para contar hasta 10{sup 6} impulsos por segundo, se requieren circuitos deflectores de mayor precision. La memoria describe dos circuitos que se pueden emplear hasta estos limites de velocidad de recuento. No es necesario que los componentes del circuito sean muy estables o muy exactos. Solamente se precisa una tension continua de alimentacion no estabilizada. (author) [Russian] Dayutsya novye resheniya dlya polucheniya otklonyayushchikh puchek luchej konturov, chto pozvolyaet osushchestvlyat' prostye i nadezhnye schetnye kontury. Trebovaniya tochnosti otkloneniya puchka luchej vyvedeny iz teoreticheskikh izyskanij schetnykh protsessov, opublikovannykh avtorom ranee. Podschityvaetsya umen'shenie predela pogreshnosti otkloneniya, vytekayushchej iz raznitsy mezhdu dejstvitel'noj i teoreticheskoj kharakteristikami ehlektronnoj lampy. Dokazyvaetsya, chto priblizitel'no okolo 3 x 10{sup 5} impul'sov v sekundu predel pogreshnosti otkloneniya dostigaet svoego maksimal'nogo znacheniya; on ne zavisit ot skorosti scheta, chto daet vozmozhnost' uprostit' konstruktsiyu konturov. Dlya otscheta do 10{sup 6} impul'sov v sekundu trebuyutsya bolee tochnye kontury otkloneniya. Opisyvayutsya dva kontura dlya ispol'zovaniya ikh do ehtikh predelov skorosti scheta. Trebovaniya, pred{sup y}avlyaemye k sostavnym chastyam kontura v

Development of a GPU-accelerated MIKE 21 Solver for Water Wave Dynamics

DEFF Research Database (Denmark)

Aackermann, Peter Edward; Pedersen, Peter Juhler Dinesen; Engsig-Karup, Allan Peter

2013-01-01

With encouragement by the company DHI are the aim of this B.Sc. thesis1 to investigate, whether if it is possible to accelerate the simulation speed of DHIs commercial product MIKE 21 HD, by formulating a parallel solution scheme and implementing it to be executed on a CUDA-enabled GPU (massive...

Računarsko modelovanje samonavođene rakete sa pokretnim pratećim koordinatorom / Computer modeling of homing systems with a mobile accompanying coordinator

Directory of Open Access Journals (Sweden)

Stojadin Manojlović

2003-03-01

Full Text Available Sistemi vođenja i upravljanja raketama uopšte, uključujući i sisteme samovođenja kao njihov poseban oblik, složeni su sistemi koji zahtevaju primenu znanja iz vise oblasti, kako bi na precizan način mogli da se formiraju što realniji matematički modeli svih strukturnih elemenata. Na osnovu matematičkog modela moguće je stvoriti računarski model pomoću kojeg se vrši analiza dinamičkog ponašanja sistema. U ovom radu predstavljeno je programsko rešenje za modelovanje sistema samovođenja zasnovano na programskom jeziku MATLAB. Rešenje je implementirano na modularnom principu, što omogućava lakšu kontrolu eventualnih grešaka i olakšava nadogradnju novim komponentama, npr. drugi tip zakona vođenja. / Guidance and control systems, including homing systems, are complex systems requiring the application of knowledge from different areas in order to form precise mathematical models of all system elements. The computer model is based on the mathematical model of a homing system and it enables the system dynamical performance analysis. In this paper a computer model of the homing system is presented. The described software is open for upgrade, i.e. for another type of the guidance law.

GSM SiNYALLERİNİN .IP OMURGASI İİZERiNI>E TAŞINMASI (SS7 OVER IP- NettcSS7

Directory of Open Access Journals (Sweden)

Çağatay Neftali Tülü

2003-08-01

Full Text Available Bu çalışmada günümüzün en popüler nıobilhaberleşme sistemi olan GSM [1 l sisteminin, kendiöğeleri aras1ndaki en temel sinyalleşme sistemi olannumara 7 (SS7 [2 sinyallerinin, günümüzün enyaygın iletim omurgast olan ve tüm dünyadakibilgisayarları birbirine bağlayan IP (3] omurgasıüzerinden taşınabilmesi için gerekli si stemin tasar11n1ve gerçeklenınesi üzerinde çahş1lmtştır. Klasil\\ SS7iletimine göre en büyüllt; faydası çok düşül{ maliyetiolan bu sistem sayesinde, dünyadaki b i r çok GSMşebekesi ara bağlanti harcanıalarıııda büyükmiktarda tasarrufa gideceklerdir. Aralarındakiklasik 64 KB/sn 'lik ara bağlantı yerine, bununüzerinde bir bağlantı hızı ile iki şebeke haberleşmişolacaktır. Bu değişimierin etkisi abonelere fiyatlardadüşüş ve servis kalitesinde yükseliş olarakyansıyacaktır.

Massively parallel data processing for quantitative total flow imaging with optical coherence microscopy and tomography

Science.gov (United States)

Sylwestrzak, Marcin; Szlag, Daniel; Marchand, Paul J.; Kumar, Ashwin S.; Lasser, Theo

2017-08-01

We present an application of massively parallel processing of quantitative flow measurements data acquired using spectral optical coherence microscopy (SOCM). The need for massive signal processing of these particular datasets has been a major hurdle for many applications based on SOCM. In view of this difficulty, we implemented and adapted quantitative total flow estimation algorithms on graphics processing units (GPU) and achieved a 150 fold reduction in processing time when compared to a former CPU implementation. As SOCM constitutes the microscopy counterpart to spectral optical coherence tomography (SOCT), the developed processing procedure can be applied to both imaging modalities. We present the developed DLL library integrated in MATLAB (with an example) and have included the source code for adaptations and future improvements. Catalogue identifier: AFBT_v1_0 Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AFBT_v1_0.html Program obtainable from: CPC Program Library, Queen's University, Belfast, N. Ireland Licensing provisions: GNU GPLv3 No. of lines in distributed program, including test data, etc.: 913552 No. of bytes in distributed program, including test data, etc.: 270876249 Distribution format: tar.gz Programming language: CUDA/C, MATLAB. Computer: Intel x64 CPU, GPU supporting CUDA technology. Operating system: 64-bit Windows 7 Professional. Has the code been vectorized or parallelized?: Yes, CPU code has been vectorized in MATLAB, CUDA code has been parallelized. RAM: Dependent on users parameters, typically between several gigabytes and several tens of gigabytes Classification: 6.5, 18. Nature of problem: Speed up of data processing in optical coherence microscopy Solution method: Utilization of GPU for massively parallel data processing Additional comments: Compiled DLL library with source code and documentation, example of utilization (MATLAB script with raw data) Running time: 1,8 s for one B-scan (150 × faster in comparison to the CPU

GPU-accelerated atmospheric chemical kinetics in the ECHAM/MESSy (EMAC Earth system model (version 2.52

Directory of Open Access Journals (Sweden)

M. Alvanos

2017-10-01

Full Text Available This paper presents an application of GPU accelerators in Earth system modeling. We focus on atmospheric chemical kinetics, one of the most computationally intensive tasks in climate–chemistry model simulations. We developed a software package that automatically generates CUDA kernels to numerically integrate atmospheric chemical kinetics in the global climate model ECHAM/MESSy Atmospheric Chemistry (EMAC, used to study climate change and air quality scenarios. A source-to-source compiler outputs a CUDA-compatible kernel by parsing the FORTRAN code generated by the Kinetic PreProcessor (KPP general analysis tool. All Rosenbrock methods that are available in the KPP numerical library are supported.Performance evaluation, using Fermi and Pascal CUDA-enabled GPU accelerators, shows achieved speed-ups of 4. 5 ×  and 20. 4 × , respectively, of the kernel execution time. A node-to-node real-world production performance comparison shows a 1. 75 ×  speed-up over the non-accelerated application using the KPP three-stage Rosenbrock solver. We provide a detailed description of the code optimizations used to improve the performance including memory optimizations, control code simplification, and reduction of idle time. The accuracy and correctness of the accelerated implementation are evaluated by comparing to the CPU-only code of the application. The median relative difference is found to be less than 0.000000001 % when comparing the output of the accelerated kernel the CPU-only code.The approach followed, including the computational workload division, and the developed GPU solver code can potentially be used as the basis for hardware acceleration of numerous geoscientific models that rely on KPP for atmospheric chemical kinetics applications.

Fully 3-D list-mode positron emission tomography image reconstruction on a multi-GPU cluster

Energy Technology Data Exchange (ETDEWEB)

Cui, Jingyu [Stanford Univ., CA (United States). Dept. of Electrical Engineering; Prevrhal, Sven; Shao, Lingxiong [Philips Healthcare, San Jose, CA (United States); Pratx, Guillem [Stanford Univ., CA (United States). Dept. of Radiation Oncology; Levin, Craig S. [Stanford Univ., CA (United States). Dept. of Radiology, Electrical Engineering, and Physics; Stanford Univ., CA (United States). Molecular Imaging Program at Stanford (MIPS); Stanford Univ., CA (United States). School of Medicine

2011-07-01

List-mode processing is an efficient way of dealing with the sparse nature of PET data sets, and is the processing method of choice for time-of-flight (ToF) PET. We present a novel method of computing line projection operations required for list-mode ordered subsets expectation maximization (OSEM) for fully 3-D PET image reconstruction on a graphics processing unit (GPU) using the compute unified device architecture (CUDA) framework. Our method overcomes challenges such as compute thread divergence, and exploits GPU capabilities such as shared memory and atomic operations. When applied to line projection operations for list-mode time-of-flight PET, this new GPU-CUDA reformulation is 188X faster than a single-threaded reference CPU implementation. When embedded in a multi-process environment on a GPU-equipped small cluster, a speedup of 4X was observed over the same configuration but without GPU support. Image quality is preserved with root mean squared (RMS) deviation of 0.05% between CPU and GPU-generated images, which has negligible effect in typical clinical applications. (orig.)

Análisis de la implementación software de un conformador de señales ultrasónicas para tiempo real

Directory of Open Access Journals (Sweden)

D. Romero-Laorden

2016-10-01

Full Text Available Resumen: Este trabajo analiza la implementación software en un sistema de imagen ultrasónica del Total Focusing Method para la compensación dinámica en tiempo real de los tiempos de vuelo para emisión y recepción de todos los puntos de la imagen. Para ello, haciendo uso de técnicas GPGPU, se analizan dos diferentes alternativas de implementación, mostrando como una planificación adecuada de acceso a los datos permite mejorar los tiempos de ejecución del algoritmo. Abstract: This paper studies the software implementation in an ultrasonic imaging system of Total Focusing Method. In order to accomplish real-time requirements parallel programming techniques have been used. Then, using GPGPU techniques, two different implementation alternatives are analysed, showing how proper planning of access to data improves the performance of the algorithm. Palabras clave: Imagen Ultrasónica, Procesamiento de Señal, Computación Paralela, GPU, CUDA, Keywords: Ultrasonic imaging GPU Signal Processing Parallel computing CUDA

Multi-GPU parallel algorithm design and analysis for improved inversion of probability tomography with gravity gradiometry data

Science.gov (United States)

Hou, Zhenlong; Huang, Danian

2017-09-01

In this paper, we make a study on the inversion of probability tomography (IPT) with gravity gradiometry data at first. The space resolution of the results is improved by multi-tensor joint inversion, depth weighting matrix and the other methods. Aiming at solving the problems brought by the big data in the exploration, we present the parallel algorithm and the performance analysis combining Compute Unified Device Architecture (CUDA) with Open Multi-Processing (OpenMP) based on Graphics Processing Unit (GPU) accelerating. In the test of the synthetic model and real data from Vinton Dome, we get the improved results. It is also proved that the improved inversion algorithm is effective and feasible. The performance of parallel algorithm we designed is better than the other ones with CUDA. The maximum speedup could be more than 200. In the performance analysis, multi-GPU speedup and multi-GPU efficiency are applied to analyze the scalability of the multi-GPU programs. The designed parallel algorithm is demonstrated to be able to process larger scale of data and the new analysis method is practical.

Trust

OpenAIRE

Carro, Salvatore

2006-01-01

Il lavoro eseguito ha per oggetto il trust, istituto, come noto, estraneo alla nostra cultura giuridica, tipico dei sistemi di common law, riconosciuto e regolato dalla Convenzione dell’ Aja, firmata il 1°luglio 1985, ratificata in Italia con L. 16 ottobre 1989, n. 364, ed entrata in vigore il 1° giugno 1992. La ricerca svolta ha, in primo luogo, esaminato la fattispecie, con un approccio comparatistico, analizzando, nella prima parte, il contenuto e la controversa natura giuridica della c...

Avtomatsko vodenje pri avtonomnih jadrnicah

OpenAIRE

ROJE, MARIN

2016-01-01

Avtonomne jadrnice so robotska plovila, ki brez potrebe po človekovih posegih uporabljajo veter za pogon in upravljajo z jadri in krmilom. Namen razvoja teh plovil je izdelava jadrnice brez posadke, ki omogoča popolno samostojno jadranje, varno plovbo in izvajanje dolgoročnih nalog na morju. Najpomembnejši sistemi avtonomnih jadrnic so: sistem za dolgoročno načrtovanje plovne poti v odvisnosti od vremenskih razmer, sistem za kratkoročno preusmerjanje jadrnice v odvisnosti od trenutnih pod...

The luminescent chamber and its use in high-energy physics experiments; La chambre a luminescence: son emploi dans les experiences de physique des hautes energies; Lyuminestsentnaya kamera i ee ispol'zovanie v ehksperimentakh, provodimykh v fizike vysokikh ehnergij; La camara luminiscente y su empleo en experimentos de fisica de elevada energia

Energy Technology Data Exchange (ETDEWEB)

Jones, L W; Perl, M L [Randall Laboratory of Physics, University of Michigan, Ann Arbor, MI (United States); Lawrence Radiation Laboratory, University of California, Berkeley, CA (United States)

1962-04-15

los protones de retroceso procedentes de la dispersion inelastica de piones (produccion de piones aislados) en tres cantidades de movimiento correspondientes a piones incidentes. En este caso se registraron tambien varios millares de sucesos. El alcance y el angulo del proton de retroceso determinaron exclusivamente la transferencia de cantidad de movimiento y la energia del centro de masa del sistema di-pion, que fueron los parametros cinematicos de interes en este problema. En estos experimentos se logro un disparo despues de cada suceso y un tiempo de resolucion de 5 {mu}s, desbloqueando el segundo tubo de imagenes al recibir una senal del circuito electronico del contador de centelleo. Los autores estudian la preparacion y la ejecucion con exito de estos experimentos, sobre todo las caracteristicas mas interesantes de los tubos de imagenes de los contadores de centelleo y de los sistemas electronicos. Se ha adquirido tambien experiencia en el analisis de fotografias de trazas, en particular respecto de la precision alcanzable y la exactitud de los datos fisicos obtenidos. Por ultimo examinan la evolucion futura de las camaras luminiscentes, en especial de los tubos intensificadores de imagenes y los centelleadores en desarrollo actualmente. Tambien analizan el papel que la camara luminiscente podra desempenar en los futuros experimentos con particulas de elevada energia, en comparacion con las camaras de chispa y otros detectores. (author) [Russian] Vpervye v ehksperimentakh v oblasti fiziki chastits vysokikh ehnergij byla ispol'zovana lyuminestsentnaya kamera. Na bevatrone radiatsionnoj laboratorii im. Lourensa s pomoshch'yu kaskadnoj sistemy trekh usilitelej yarkosti izobrazheniya byli sfotografirovany sledy chastits v aktivirovannykh jodisto-natrievykh kristallakh. Pri odnom ehksperimente uprugoe rasseyanie pi-mezonov na protonakh izuchalos' s pomoshch'yu dvukh blokov stsintillyatorov, kazhdyj iz kotorykh imel dlinu 20 sm, prichem odin ispol'zovalsya dlya

An Investigation of Unified Memory Access Performance in CUDA

Science.gov (United States)

Landaverde, Raphael; Zhang, Tiansheng; Coskun, Ayse K.; Herbordt, Martin

2015-01-01

Managing memory between the CPU and GPU is a major challenge in GPU computing. A programming model, Unified Memory Access (UMA), has been recently introduced by Nvidia to simplify the complexities of memory management while claiming good overall performance. In this paper, we investigate this programming model and evaluate its performance and programming model simplifications based on our experimental results. We find that beyond on-demand data transfers to the CPU, the GPU is also able to request subsets of data it requires on demand. This feature allows UMA to outperform full data transfer methods for certain parallel applications and small data sizes. We also find, however, that for the majority of applications and memory access patterns, the performance overheads associated with UMA are significant, while the simplifications to the programming model restrict flexibility for adding future optimizations. PMID:26594668

Chaotic behavior of the lattice Yang-Mills on CUDA

Directory of Open Access Journals (Sweden)

Forster Richárd

2015-12-01

Full Text Available The Yang-Mills fields plays important role in the strong interaction, which describes the quark gluon plasma. The non-Abelian gauge theory provides the theoretical background understanding of this topic. The real time evolution of the classical fields is derived by the Hamiltonian for SU(2 gauge field tensor. The microcanonical equations of motion is solved on 3 dimensional lattice and chaotic dynamics was searched by the monodromy matrix. The entropy-energy relation was presented by Kolmogorov-Sinai entropy. We used block Hessenberg reduction to compute the eigenvalues of the current matrix. While the purely CPU based algorithm can handle effectively only a small amount of values, the GPUs provide enough performance to give more computing power to solve the problem.

CUDA-accelerated genetic feedforward-ANN training for data mining

International Nuclear Information System (INIS)

Patulea, Catalin; Peace, Robert; Green, James

2010-01-01

We present an implementation of genetic algorithm (GA) training of feedforward artificial neural networks (ANNs) targeting commodity graphics cards (GPUs). By carefully mapping the problem onto the unique GPU architecture, we achieve order-of-magnitude speedup over a conventional CPU implementation. Furthermore, we show that the speedup is consistent across a wide range of data set sizes, making this implementation ideal for large data sets. This performance boost enables the genetic algorithm to search a larger subset of the solution space, which results in more accurate pattern classification. Finally, we demonstrate this method in the context of the 2009 UC San Diego Data Mining Contest, achieving a world-class lift on a data set of 94682 e-commerce transactions.

CUDA-accelerated genetic feedforward-ANN training for data mining

Energy Technology Data Exchange (ETDEWEB)

Patulea, Catalin; Peace, Robert; Green, James, E-mail: cpatulea@sce.carleton.ca, E-mail: rpeace@sce.carleton.ca, E-mail: jrgreen@sce.carleton.ca [School of Systems and Computer Engineering, Carleton University, Ottawa, K1S 5B6 (Canada)

2010-11-01

We present an implementation of genetic algorithm (GA) training of feedforward artificial neural networks (ANNs) targeting commodity graphics cards (GPUs). By carefully mapping the problem onto the unique GPU architecture, we achieve order-of-magnitude speedup over a conventional CPU implementation. Furthermore, we show that the speedup is consistent across a wide range of data set sizes, making this implementation ideal for large data sets. This performance boost enables the genetic algorithm to search a larger subset of the solution space, which results in more accurate pattern classification. Finally, we demonstrate this method in the context of the 2009 UC San Diego Data Mining Contest, achieving a world-class lift on a data set of 94682 e-commerce transactions.

Sterilization by Gamma-Radiation of the Sodium Salt of p-Amino-Salicylic Acid; Sterilisation par irradiation gamma du sel sodique de l' acide p-amino salicylique; Sterilizatsiya gamma-oblucheniem natrievoj soli paraaminosalitsilovoj kisloty; Esterilizacion porirradiacion gamma dela sal sodica del acido p-aminosalicilico

Energy Technology Data Exchange (ETDEWEB)

Bellion, B.; Denti, E.; Massagli, A. [Sorin, Centro Ricerche Nucleari, Saluggia (Italy)

1963-11-15

Sodium p-amino-salicylate cannot be sterilized thermally. During manufacture or packing for medical purposes it must therefore be handled under sterilized conditions, with all the difficulties which this involves. The paper quotes experimental data to show that, using gamma irradiation, the product may be sterilized without damage and without the formation of substances harmful from the medical standpoint. (author) [French] Le p-amino salicylate de sodium ne peut Etre sterilise par la chaleur. Pour l'emploi de ce produit comme medicament on est donc oblige de l e manipuler tant pour la fabrication que pour l'emballage, dans des locaux steriles, avec toutes les difficultes qui s'ensuivent. Dans ce travail, les auteurs ont pu demontrer experimentalement la possibilite de steriliser le produit par irradiation gamma, sans endommager le produit et sans formation de substances nocives pour l'emploi medical. (author) [Spanish] El pamino salicilato de sodio no puede esterilizarse por vfa termica y, por lo tanto, para emplearlo como medicamento es preciso prepararlo y empaquetarlo en locales esterilizados, con las dificultades consiguientes; Los autores han demostrado experimentalmente que es posible esterilizar este compuesto por exposicion a los rayos gamma, sin alterarlo y sin que se formen substancias nocivas desde el punto de vista medico. (author) [Russian] Natrievaya sol' paraaminosalitsilovoj kisloty ne mozhet byt' sterilizovana pri pomoshchi nagreva, i dlya togo, chtoby ispol'zovat' ehtot produkt v kachestve medikamenta, nuzhno obrabatyvat' ego kak v protsesse proizvodstva, tak i pri upakovke v steril'nykh pomeshcheniyakh so vsemi vytekayushchimi otsyuda trudnostyami. V dannoj rabote avtory smogli ehksperimental'nym putem dokazat' vozmozhnost' sterilizatsii ehtogo produkta gamma-oblucheniem bez ushcherba dlya ehtogo produkta i bez obrazovaniya vrednykh veshchestv, chto pozvolyaet ego v meditsine. (author)

A 900-channel coincidence pulse-amplitude analyser; Selecteur d'amplitudes d'impulsions a coincidence a trois dimensions; Devyatisotkanal'nyj amplitudnyj analizator impul'sov sovpadeniya; Analizador de amplitud de impulsos de coincidencia con 900 canales

Energy Technology Data Exchange (ETDEWEB)

Alexander, T K; Robinson, L B [Atomic Energy of Canada Limited, Chalk River, Ontario (Canada)

1962-04-15

, les huit de la distribution A definissent huit groupes de 100 canaux pour les distributions B. En effet, on aura dans ce cas un analyseur a 100 canaux pour la distribution A et huit analyseurs distincts a 100 canaux, sur lesquels B peut etre dirige. Le memoire decrit les circuits de base du codeur et la logique de la memoire et de l'element . (author) [Spanish] Se describe un analizador proyectado para estudios de correlacion entre las distribuciones de amplitudes de impulsos procedentes de dos contadores de centelleo. El analizador consiste en dos unidades transistorizadas: un convertidor analogico-digital de doble canal y una unidad almacenadora de nucleos de ferrita, con 900 canales y una capacidad de 2{sup 16} por canal. La unidad de control y lectura del instrumento esta separada del resto y puede ser colocada a cierta distancia del analizador. El funcionamiento del aparato para el analisis de impulsos coincidentes en las entradas A u V del convertidor puede ser regulado de manera que sea de 30 canales por 30 distribuciones, de 100 por 9, o de 300 por 3. En los dos ultimos casos las lineas de base y la anchura de las ''ventanas'' de amplitud de impulsos en la distribucion A pueden ser elegidas por el operador. Con 100 canales para el analisis de amplitud de impulsos, ocho ''ventanas'' en la distribucion A definen ocho grupos de 100 canales para las distribuciones B. En este caso se dispone, en efecto, de un analizador de 100 canales para la distribucion A y de ocho analizadores separados de 100 canales para la distribucion B. Se describen los circuitos basicos del convertidor y se explica la logica de las unidades de almacenamiento y lectura. (author) [Russian] Opisyvaetsya analizator, prednaznachennyj dlya issledovaniya sootnosheniya raspredeleniya amplitud impul'sov dvukh stsintillyatsionnykh schetchikov. Analizator sostoit iz d v u kh otdel'nykh sektsij, rabotayushchikh na tranzistorakh, dvukhkanal'nogo kodirovochnogo

Radio-tracer techniques in the study of corrosion by molten fluorides; Etude, a l'aide d'indicateurs radioactifs, de la corrosion provoquee par les fluorures fondus; Primenenie metodov radioaktivnykh indikatorov nrn izuchenii korrozii, prichinyaemoj rasplavlennymi ftoristymi soedineniyami; Estudio con indicadores radiactivos de la corrosion ocasionada por fluoruros fundidos

Energy Technology Data Exchange (ETDEWEB)

Grimes, W R; Watson, G M; DeVan, J H; Evans, R B [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

1962-03-15

segundo se utilizo para hacer circular una mezcla fundida quo contenia FeF{sub 2} y medir la eliminacion del cromo de la aleacion. Los resultados obtenidos concuerdan satisfactoriamente con los que se calculan con ayuda de los coeficientes de difusion determinados experimentalmente; esta concordancia indica que el coeficiente de autodifusion del Cr no es afectado por las variaciones de la concentracion de cromo en la aleacion Inor-8. (author) [Russian] Kogda ''inkonel'' ili ''inor-8'' podvergayutsya dejstviyu rasplavlennykh ftoristykh smesej, soderzhashchikh vosstanavlivayushchie veshchestva, khrom izbiratel'no okislyaetsya i udalyaetsya iz splava. S pomoshch'yu radioaktivnogo indikatora Cr{sup 51} byli ustanovleny koehffitsienty samodiffuzii khroma v ''inkonsle'' i ''inore-8'', a takzhe byla izuchena primenimost' znachenij ehtikh koehffitsientov k splavam v korrozijnykh usloviyakh. Summarnye koehffitsienty byli polucheny putem sleduyushchikh zamerov: 1) obedneniya v Cr{sup 51} (zagruzhennogo v vide CrF{sub 2}) nekorrozijnykh ftoristykh rasplavov v legirovannykh kapsulakh i 2) sootnosheniya mezhdu izmerimoj obshchej radioaktivnost'yu obrabotannykh sol'yu obraztsov splava i radioaktivnost'yu soli, dejstviyu kotoroj obraztsy byli podvergnuty. Pomimo ehtogo, koehffitsienty byli polucheny putem zamera grafika kontsentratsii indikatora pri posledovatel'noj ehlektropolirovke obraztsov. Summarnye koehffitsienty, a takzhe koehffitsienty, poluchennye opytami ehlektropolirovki, ochen' blizko sovpadayut dlya ''inkonelya'' pri vysokikh temperaturakh i dlya ''inora-8'' pri vsekh temperaturakh. Dlya temperatur nizhe 750{sup o} C koehffitsienty, poluchetshe pri pomoshchi ehlektropolirovki obraztsov ''sinkonelya'' prevyshayut znacheniya summarnykh koehffitsientov; v ehtom sluchae protsess diffuzii v masse ne odnoobrazen. Vo vsekh sluchayakh nablyudalos' khoroshee sovladenie mezhdu summarnymi koehffitsientami diffuzii i koehffitsientami, poluchennymi putem ehkstrapolyatsii dannykh

Paralelização e comparação de métodos iterativos na solução de sistemas lineares grandes e esparsos

Directory of Open Access Journals (Sweden)

Lauro Cássio Martins de Paula

2013-11-01

Full Text Available Apresenta-se neste trabalho uma comparação de desempenho computacional entre métodos iterativos utilizados para solução de sistemas lineares. O objetivo é mostrar que a utilização de processamento paralelo fornecido por uma Graphics Processing Unit (GPU pode ser viável, por viabilizar a solução rápida de sistemas de equações lineares, para que sistemas grandes e esparsos possam ser solucionados em um espaço curto de tempo. Para a validação do trabalho, utilizou-se uma GPU, por meio da arquitetura Compute Unified Device Architecture (CUDA, e comparou-se o desempenho computacional dos métodos iterativos de Jacobi, Gauss-Seidel, BiCGStab e BiCGStab(2 paralelizado na solução de sistemas lineares de tamanhos variados. Foi possível observar uma aceleração significativa nos testes com o método paralelizado, que se acentua consideravelmente na medida em que os sistemas aumentam. Os resultados mostraram que a aplicação de processamento paralelo em um método robusto e eficiente, tal como o BiCGStab(2, se torna muitas vezes indispensável, para que simulações sejam realizadas com qualidade e em tempo não proibitivo.Palavras-chave: CUDA. GPU. BiCGStab(2.Parallelization and comparison of interative methods in solving large and sparse linear systemsAbstractThis paper presents a computational performance comparison between some iterative methods used for linear systems solution. The goal is to show that the use of parallel processing provided by a Graphics Processing Unit (GPU may be more feasible, for making possible the fast solution of linear equations systems in order that complex and sparse problems can be solved in a short time. To validate the paper a GPU through the NVIDIA's Compute Unified Device Architecture (CUDA was employed and the computational performance was compared with Jacobi, Gauss-Seidel, BiCGStab iterative methods and BiCGStab(2 parallelized in the solution of linear systems of varying sizes. There was a

A Low-Level Geiger-Counter for Tritium; Compteur Geiger a faible mouvement propre pour le tritium; Schetchik Gejgera s nizkim urovnem dlya tritiya; Contador Geiger de baja actividad de fondo para tritio

Energy Technology Data Exchange (ETDEWEB)

Von Buttlar, H; Stahl, W [Technische Hochschule, Darmstadt (Germany)

1962-01-15

pour controler la stabilite a long terme du systeme. (author) [Spanish] Contador Geiger de baja actividad de fondo para tritio. Los autores construyeron un tubo contador cilindrico de 11 l que contiene una serie de conductores de anticoincidencia en torno a un contador central de 2,9 l de volumen efectivo. La seccion de anticoincidencia esta separada del contador central por una delgada hoja de Hostaphan aluminizada. En el trabajo figura una serie de detalles constructivos. El gas que llena el contador consiste en una mezcla de etileno a 30 mm, de argon a 40 mm y la muestra de hidrogeno hasta 700 mm. Un circuito de extincion externo, cuyo tiempo muerto es de 7 ms, elimina eficazmente todos los impulsos demorados. Con un blindaje de hierro de 30 cm, el indice de recuento del contador central con hidrogeno gaseoso inerte es de 350 impulsos/min cuando el circuito de anticoincidencia no funciona y de unos 3 impulsos/min en el caso contrario. Suponiendo que un valor de 1 impulso/min por encima de la actividad de fondo sea significativo, resulta posible medir razones T/H muy pequenas, hasta 10{sup -16}, sin necesidad de proceder a un enriquecimiento isotopico. Se siguen realizando experimentos para verificar la estabilidad a largo plazo del dispositivo. (author) [Russian] Byla skonstruirovan a tsilindricheskaya trubka s ob{sup e}mom v 11 litrov, kotoraya soderzhit ryad provodov antisovpadeniya, okhvatyvayushchikh tsentral'nuyu chast' schetchika emkost'yu v 2,9 litra. TSentral'naya chast' schetchika otdelena ot sektsii antisovpadeniya tonkoj alyuminirovannoj Gostafanovoj fol'goj. Privodyatsya podrobnye dannye konstruktsii. Gaz dlya napolneniya schetchika sostoit iz 30 torr ehtilena, 40 torr argona i do 700 torr obraztsa vodoroda. Vneshnyaya tsep' gasheniya s mertvym vremenem v 7 msek. uspeshno ustranyaet posleduyushchie impul'sy. V 30 cm zheleznom ehkrane skorost' otcheta tsentral'noj chasti schetchika s ''mertvym'' vodorodnym gazom sostavlyaet 350 otschetov v minutu bez

Strateginis paslaugų kokybės viešajame sektoriuje valdymas: Klaipėdos regiono aprūpinimo elektros energija atvejis

OpenAIRE

Tamošiūnas, Teodoras; Pečiulytė, Sandra

2010-01-01

Tyrimo aktualumas ir problematika. Europos šalyse pastebimas viešojo sektoriaus modernizavimas, pritaikant naujausius, pažangiausius vadybos modelius, tarp jų – ir naujosios viešosios vadybos (Židonis, Rudnickas, 2005). Žvelgiant sistemiškai į šiuo metu keičiamus Lietuvos teisės aktus, matyti, kad viešajame sektoriuje rengiama norminė bazė, kuri gali būti tinkamas teisinis pagrindas įgyvendinant naujus viešojo administravimo principus (Vanagas, 2006). Teorinius strateginio kokybės valdymo asp...

Načini podpore prevajanju v državah Evropske unije

OpenAIRE

Šimenc, Agata

2017-01-01

Države Evropske unije poznajo različne oblike podpore, ki pomagajo pri spodbujanju in financiranju prevajanja literature v tuje jezike in s tem skrbijo za promocijo države, njene kulture, zlasti pa njene literature in njenih literarnih ustvarjalcev v tujini. Ti sistemi podpore so pomembni predvsem za literature, ki nastajajo v manj razširjenih jezikih in zato težje pridejo do tujih bralcev. Naloga primerja različne podpore prevajanju nacionalnih leposlovij v tuje jezike, ki obstajajo v različ...

MODEL SISTEMA ZA UPRAVLJANJE INFORMACIJSKE VARNOSTI V DRŽAVNI UPRAVI

OpenAIRE

Tomažič, Samo

2012-01-01

V magistrskem delu je predstavljena zasnova modela sistema za upravljanje informacijske varnosti za slovensko državno upravo. Informacijski sistemi v državni upravi morajo namreč zaradi svoje ključne vloge, ki jo opravljajo, delovati brezhibno, saj ima lahko že majhen izpad hujše ekonomske ali drugovrstne posledice, ki jih državljani čutimo neposredno. V okviru sistematične vpeljave sistema za upravljanje informacijske varnosti (SUIV) v katerokoli organizacijo, se držimo štirih temeljnih faz ...

VPLIV RAZKRITIJ O INTELEKTUALNEM KAPITALU NA CENO DOLGOV, PRIMER SLOVENIJE

OpenAIRE

Stropnik, Neca

2016-01-01

Gospodarske razmere, tako v Sloveniji, kot drugod po Evropi in svetu, so zadnja leta zelo zahtevne. V slovenskem gospodarstvu smo priča propadu številnih organizacij, ogrožen je tako finančni (oziroma bančni) kot nepremičninski trg. Tradicionalnemu finančnemu kapitalu zmanjkuje moči, preživele pa so (oziroma bodo) predvsem inovativne ter na dobrih temeljih osnovane organizacije. Uveljavljajo se novi, demokratični sistemi upravljanja organizacij, ki vključujejo predvsem zaposlene ter njihove s...

Vpliv inovativnega izobraževanja in informacijsko-komunikacijske tehnologije na spremembe pedagoške paradigme

OpenAIRE

Flogie, Andrej

2017-01-01

Za temelj naloge smo postavili neposredno korelacijo med izobraževalno teorijo in prakso. Predstavljen je izvirni znanstveni prispevk na področju razvoja edukacijske znanosti, s katerim se ukvarjajo vse države članice Evropske unije. Temelj izobraževalni teoriji v nalogi tako predstavljajo pomembni filozofski koncepti izobraževalnih sistemov kot tudi učne paradigme zadnjega obdobja. Na teh dveh izhodiščih je opredeljena didaktika, njen razvoj skozi čas in posledično izobraževalni sistemi posa...

The Subcritical Assembly for High-Temperature Use; Assemblage Sous-Critique Pour Emploi a Haute Temperature; K voprosu o podkriticheskoj sborke dlya ispol'zovaniya pri vysokikh temperaturakh; Conjunto Subcritico para Temperatura Elevada

Energy Technology Data Exchange (ETDEWEB)

Sakurai, Y.; Sekiya, T.; Suita, T. [Osaka University (Japan); Hishida, H.; Hamada, H.; Nagashima, K. [Sumitomo Atomic Energy Industries Group (Japan)

1964-04-15

semejantes a los de un pequeflo reactor nuclear. Se estudia la manera de determinar experimentalmente el laplaciano del sistema y se procura encontrar la mejor ubicacion posible para la fuente neutronica pulsante y para los detectores. Ademas, se esta perfeccionando un metodo exclusivo de medicion de la densidad del flujo neutronico a temperatura elevada. Por ultimo, el autor se propone investigar la influencia de esta temperatura elevada sobre los parametros del reactor. (author) [Russian] Podkriticheskie sborki predstavljajut soboj ustanovki s grafitovym zamedlitelem i toplivom v vide prirodnogo urana. Osobennost' konstrukcii takoj ustanovki zakljuchaetsja v nalichii vysokotemperaturnoj oblasti, kotoraja mozhet byt' sozdana v centre sborok aktivnoj zony v nizkotemperaturnoj oblasti i daet vozmozhnost' poluchenija informacii kak dlja vysokotemperaturnogo reaktora s gazovym ohlazhdeniem, tak i dlja neposredstvennogo prevrashhenija jenergii vysokotemperaturnoj gazovoj sredy v jelektrichestvo. Dalee, podkriticheskie sborki predpolagaetsja ispol'zovat' dlja podgotovki studentov starshih kursov. Dannaja sborka byla smontirovana v ob{sup e}me 2 x 2 x 3 m iz grafitovyh blokov v vide kvadratnyh sterzhnej dlinoj 10 sm. Vysokotemperaturnaja oblast' ob{sup e}mom 1 m3 obrazuetsja s pomoshh'ju dzhouleva tepla, v nej mozhet podderzhivat'sja temperatura do 2000 Degree-Sign S. Dlja nizkotemperaturnoj oblasti primenjaetsja toplivo v vide tabletok UO{sub 2}, dlja vysokotemperaturnoj chasti izgotovljajutsja tabletki iz UC{sub 2}. Toplivo pomeshhaetsja vnutri grafitovoj obolochki kvadratnyh sterzhnej. Istochniki Am -Be moshhnost'ju 5 kjuri ustanavlivajutsja pod podstavkoj, raspolozhennoj v nizhnej chasti sborok. S drugoj storony, impul'snye nejtrony inzhektirujutsja v proizvol'noj tochke vnutri sborki. Mishen' v konce rasshiritel'noj trubki uskoritelja bombardiruetsja puchkom dejtronov. Vyhodnaja shina sistemy dzhouleva podogreva ohlazhdaetsja vodoj, a dlja ohlazhdenija vsej poverhnosti stenok

Implementació del run-time Nanos++ sobre GMAC

OpenAIRE

Solà Vélez, Marçal

2013-01-01

L'objectiu d'aquest projecte és la implementació d'una nova versió del runtime Nanos++, desenvolupat al BSC i que dona suport al model de programació OmpSs. La nova versió ha de donar suport a la programació de GPUs, fent ús de la biblioteca GMAC i substituint l'actual implementació basada en CUDA.

Strade, ferrovie e grandi rischi

Directory of Open Access Journals (Sweden)

Scira Menoni

2009-07-01

Full Text Available Nell’articolo il rapporto tra sistemi di accessibilità (ferroviaria e stradale e grandi rischi viene affrontato da due diverse prospettive. La prima vede tali sistemi come esposti e vulnerabili a diverse forme di pericolosità naturale; la seconda li considera invece quali potenziali fonti di pericolo, indagando in particolare il trasporto di sostanze pericolose. Per quanto riguarda la prima parte dell’articolo, ovvero l’analisi di vulnerabilità delle infrastrutture di trasporto a diversi agenti naturali, verranno esplicitati i fattori di vulnerabilità fisica, sistemica e organizzativa. A sostegno della modellazione proposta, si fa riferimento sia alla letteratura internazionale sia al metodo sviluppato presso il Politecnico di Milano, nei suoi ultimi sviluppi. Interessa infatti presentare un metodo relativamente semplice da utilizzare a scala vasta per poi scendere nel dettaglio necessario laddove le priorità individuata a grande scala ne indichino la necessità. Tra i fattori di vulnerabilità fisica si indicheranno gli elementi maggiormente critici per diversi tipi di sollecitazione (sismica, vulcanica, alluvionale, etc.; per quanto attiene ai fattori di vulnerabilità sistemica si considerano le interdipendenze tra reti e sistemi (inclusi gli altri servizi a rete; per quanto attiene alla vulnerabilità organizzativa si indicheranno le difficoltà nel produrre un sistema integrato di allertamento, che consenta ad esempio di chiudere tratti di strada quando questi vengano segnalati come imminentemente interessati da un dato evento estremo. Infine si indicheranno i danni che il sistema di accessibilità può subire e le ripercussioni di questi sul territorio di interesse. Nella seconda parte viene trattato un particolare tipo di trasporto, quello delle sostanze pericolose, differenziando opportunamente tra ferroviario e stradale. Il ribaltamento del punto di vista comporta la necessità di identificare in modo puntuale i fattori di

Integrazione di tecniche informatiche per la conservazione della Memoria Storica. Il centro urbano di S. Pietro Infine.

Directory of Open Access Journals (Sweden)

Michela Cigola

2012-11-01

Full Text Available La sperimentazione che si presenta in questo articolo è un corollario delle esperienze condotte con le ricerche PRIN 2006 e PRIN 2008, che avevano come focus l’uso e l’approfondimento dei Sistemi Informativi territoriali, che il nostro gruppo ha testato a diverse scale trovando in essi un validissimo supporto all’analisi ed al rilievo. Abbiamo pensato di far dialogare i sistemi GIS con la tecnologia laser scanner, strumenti uno per rappresentare e l’altro per rilevare basandoci sul fatto che entrambi gli approcci operativi, GIS e Scanner Laser trattano elementi topologici [punti] proiettati in determinati Datum cartografici. In sintesi si propone di individuare una procedura in grado di confrontare/leggere il modello 3D-Digital Surface Model (DSM, risultato dell’elaborazione della nuvola di punti georeferenziati acquisiti con la scansione, all’interno di strutture G.I.S. verificando la possibilità di associare ad esso, banche di dati complesse con contenuti che riguardano anche gli elementi del rilievo tradizionale. In questo modo si tenta di informatizzare la conoscenza singolare e sistemica di architetture o nuclei urbani e la rappresentazione con modelli 3D interattivi risultati di un rilievo strumentale. La sperimentazione sarà condotta sul centro urbano di San Pietro Infine, in provincia di Caserta, tessuto urbano di grande interesse, poiché è rimasto immutato dal momento in cui fu distrutto dai bombardamenti alleati durante l’ultima guerra.

Come difendere la globalizzazione e salvaguardare i sistemi bancari dal contagio?

Directory of Open Access Journals (Sweden)

Mario Sarcinelli

2012-03-01

Full Text Available The work summarises the main literature on the impact of globalisation and of the crisis on banking systems. The main conclusion is that a more compelling approach to financial regulation appears as necessary, though the complete homogenisation of financial systems is not a goal to be sought. The current approaches in the Anglo-Saxon countries, based on the segmentation of banking activities seems a right choice, due to both the political difficulties in enacting a stricter regulation of finance and the practical difficulty of regulating a sector pervaded by financial innovation. However, both the Volcker rule and the British approach of ring-fencing, suffer from two limitations: the risk of transferring even more risk to the shadow banking system, and the difficulty in practice to distinguish between legitimate hedging activities and forbidden speculative activities.

SCADA Sistemi ile Bir İşletmenin Dış Saha Otomasyonu

OpenAIRE

Kılıç, Murat; Özdemir, Şule

2010-01-01

Bu çalışmada, PLC (Programmable Logic Controller: Programlanabilir Mantık Denetleyici) ve SCADA (Supervising Control and Data Acquisition: Veri Tabanlı Kontrol ve Gözetleme) sistemleriyle bir MDF (Medium Density Fiberboard) presi dış saha besleme hattının otomasyonu gerçekleştirilmiştir. Tüm sistem SCADA sayesinde bilgisayar ekranından izlenebilmekte ve kontrol edilebilmektedir. MDF presi dış saha besleme hattı tam otomasyon ile çalışmaktadır. Otomasyon sisteminde PLC yazılımı olarak Siemens ...

Melatonin ve Bağışıklık Sistemi

OpenAIRE

ÇETİN, E.

2005-01-01

Melatonin, pineal bezin beta adrenerjik reseptörlerinin aktivasyonu ile triptofandan sentezlenen bir hormondur.Üretim ve salınımı karanlık ile başlar ve aydınlıkla sona erer. Melatonin, birçok biyolojik fonksiyonun düzenlenmesinderol oynar. Bu derlemede melatonin hakkında genel bilgiler verilerek, melatoninin lenfoid dokular, humoral bağışıklık,hücresel bağışıklık ve kanser üzerine etkileri tartışılmıştır

L’urbanistica riconoscerà mai il ruolo dei sistemi informativi territoriali?

Directory of Open Access Journals (Sweden)

Mauro Salvemini

2012-06-01

Full Text Available It is discussed the role of GI in contemporary city  planning  considering  three  2012  May events.REAL  CORP  2012  in  Schwechat  which  of-fered  the  possibility  to  collectively  discuss a  wide  range  of  topics  in  different  panel groups  and  workshops  about  “RE-MIXING THE CITY” which is a challenge to manage and  re-combine  the  elements  which  make our modern cities in order to better respond to change. INPUT  2012  which  in  Cagliari  was  discuss-ing how new technologies play a prominent role in the innovation of planning theory and practice,  as  they  affect  every  phase  of  the process:  knowledge  building,  preliminary studies,  design,  decision,  implementation, and monitoring.The kick off of the EC co-funded project Plan-4Business which aims to develop a platform that can serve users a full catalogue of plan-ning data such as transport infrastructure, re-gional plans, urban plans and zoning plans.

Beta-Excited Sources of Electromagnetic Radiation; Sources de rayonnements electromagnetiques excites par des particules beta; Vozbuzhdennye beta-chastitsami istochniki ehlektromagnitnogo izlucheniya; Fuentes de radiacion electromagnetica excitadas por particulas beta

Energy Technology Data Exchange (ETDEWEB)

Cameron, J F; Rhodes, J R [Physics Group, Isotope Research Division, (AERE), Wantage Research Laboratory, Wantage, Berks (United Kingdom)

1962-01-15

incluyen cuadros que permiten escoger la fuente optima para absorbentes de distintos espesores. (author) [Russian] Avtory dayut opisanie vozbuzhdennykh beta-chastitsami istochnikov ehlektromagnitnogo izlucheniya v ehnergeticheskom rajone ot 1 do 200 kehv i prigodnykh dlya promyshlennogo ispol'zovaniya. V kachestve istochnikov beta-chastits byli vzyaty tritij, prometij-147, kripton-85, tallij-204 i strontsij-90+ ittrij-90, poskol'ku oni imeyut prodolzhitel'nyj period poluraspada, nebol'shuyu stoimost', vysokuyu udel'nuyu aktivnost' i legkost' ikh polucheniya. Dlya izgotovleniya vozbuzhdennykh beta-chastitsami istochnikov staralis' dostignut' kompromissa mezhdu prakticheskimi trebovaniyami konstruktsii i nailuchshej teoreticheskoj ehffektivnost'yu v dannoj ehnergeticheskoj zone. V dannoj annotatsii avtory raz{sup y}asnyayut putem podscheta kolichestva protonov, izluchaemykh beta-chastitsami, i predusmatrivayut vnesenie izmenenij v ehti podschety dlya samoabsorbtsii rentgenovskogo izlucheniya. EHti podschety uchityvayut v to zhe samoe vremya tormoznoe izluchenie i kharakteristicheskie flyuorestsentnye luchi, maksimal'nyj vykhod kharakteristicheskikh luchej, dostigaemyj dlya mishenej Z ot 40 do 60. Nakonets, oni utverzhdayut, chto v zhelaemoj ehnergeticheskoj zone poluchayut kak luchshij vykhod fotonnogo izlucheniya so ''sloenymi'' mishenyami, sloj polovinnogo oslableniya kotorogo sootvetstvuet dline probega 1-2 beta. Alyuminij, serebro i zoloto s proizvodstvennoj tochki zreniya yavlyayutsya podkhodyashchimi ehlementami dlya pokrytiya istochnikov. Oni takzhe dayut udovletvoritel'nye vykhody tormoznogo izlucheniya i rentgenovskogo izlucheniya i raspredelenie po razlichnym ehnergeticheskim zonam v radiuse ot 0 do 200 kehv pri pravil'nom ob{sup e}dinenii s vysheukazannymi beta-izluchatelyami. Dayutsya nekotorye ehnergeticheskie spektry i privodyatsya krivye pogloshcheniya v alyuminii i zheleze dlya nailuchshikh kombinatsij istochnikov mishenej. Byla obnaruzhena neznachitel

Diffusion in moving grain-boundaries; Diffusion aux joints de grains en mouvement; Diffuziya na peremeshchayushchikhsya granichnykh poverkhnostyakh zeren; Difusion de los limites intergranulares en movimiento

Energy Technology Data Exchange (ETDEWEB)

Blackburn, D A; Brown, A F [Solid State Laboratory, University of Edinburgh, Edinburgh (United Kingdom)

1962-01-15

supera el 100% en los intervalos estudiados. (author) [Russian] Sparennye kristally medi peremeshchalis' vdol' obshchej granichnoj poverkhnosti so skorost'yu v 0,06-0,3 {mu}/ch pri temperaturakh okolo 725{sup o} C. Pri pomoshchi avtoradiografii bylo izucheno proniknovenie Ag{sup 110} v nepodvizhnye i v peremeshchaemye granichnye poverkhnosti. Kak dlya peremeshchayushchikhsya, tak i dlya nepodvizhnykh granichnykh poverkhnostej bylo polucheno khoroshee sovpadenie s formuloj Fishera. Otnoshenie koehffitsientov diffuzii na granichnoj poverkhnosti zerna i koehffitsienta diffuzii v masse kristalla (D'/D) poryadka 10{sup 6}. Dlya issledovannykh granichnykh poverkhnostej D'/D-10{sup 6}, okazyvaetsya, chto D'/D slegka vozrastaet po mere uvelicheniya obshchego sdviga i ego skorosti, no na protyazhenii obsledovannogo intervala ehto sootnoshenie ne uvelichivalos' bol'she chem v dva raza. (author)

Production of C{sup 14}-labelled compounds from C{sup 14}O{sub 2} accelerated in an electric field - Physico-chemical analysis of some radioactive compounds obtained; Production de composes marques au {sup 14}C a partir de {sup 14}CO{sub 2} accelere dans un champ electrique - Analyse physico-chimique de quelques composes radioactifs obtenus; Proizvodstvo mechennykh uglerodom-14 soedinenij iz C{sup 14}O{sub 2}, uskorennogo v ehlektricheskom pole - Fiziko-khimicheskij analiz neskol'kikh poluchennykh radioaktivnykh soedinenij; Obtencion de compuestos marcados con {sup 14}C a partir de {sup 14}CO{sub 2} acelerado en un campo electrico - Analisis fisicoquimico de algunos de los compuestos radiactivos obtenidos

Energy Technology Data Exchange (ETDEWEB)

Guillaume, M [Universite de Liege, Belgique (Belgium)

1962-03-15

con cadenas alifaticas (50 {mu}c/g para el acido glutarico) o con moleculas ciclicas que presenten una cadena alifatica (acido acetilsalicilico). (author) [Russian] V dannoj rabote izlagaetsya metod mecheniya, osnovannyj na uskorenii ehlektricheskim polem C{sup 14}O{sub 2}, kotoryj v ehto vremya poddaetsya vstupleniyu v reaktsiyu s organicheskoj mishen'yu, nakhodyashchejsya na ego traektorii. Opysyvaemaya razryadnaya kamera dejstvuet pod napryazheniem 500 v, 150 mka, a podlezhashchie mecheniyu organicheskie veshchestva vvodyatsya v ehto pole i nakhodyatsya tam okolo 3 chasov vmeste s CO{sub 2} udel'noj aktivnosti v 24 mkyuri/mmol'. Maksimal'nyj vykhod poluchennykh produktov ostaetsya slabym (okolo 6%), a 60% C{sup 14}O{sub 2} - razrusheno. EHtot maksimal'nyj vykhod poluchaetsya tol'ko dlya alifaticheskikh tsepej (50 mkkyuri/r dlya glutarovoj kisloty) ili dlya aromaticheskikh veshchestv, predstavlyayushchikh alifaticheskuyu tsep' (atsetilgalitsilovuyu kislotu). (author)

Experiences with High-Level Programming Directives for Porting Applications to GPUs

International Nuclear Information System (INIS)

Ding, Wei; Chapman, Barbara; Sankaran, Ramanan; Graham, Richard L.

2012-01-01

HPC systems now exploit GPUs within their compute nodes to accelerate program performance. As a result, high-end application development has become extremely complex at the node level. In addition to restructuring the node code to exploit the cores and specialized devices, the programmer may need to choose a programming model such as OpenMP or CPU threads in conjunction with an accelerator programming model to share and manage the difference node resources. This comes at a time when programmer productivity and the ability to produce portable code has been recognized as a major concern. In order to offset the high development cost of creating CUDA or OpenCL kernels, directives have been proposed for programming accelerator devices, but their implications are not well known. In this paper, we evaluate the state of the art accelerator directives to program several applications kernels, explore transformations to achieve good performance, and examine the expressiveness and performance penalty of using high-level directives versus CUDA. We also compare our results to OpenMP implementations to understand the benefits of running the kernels in the accelerator versus CPU cores.

Parallel Computer System for 3D Visualization Stereo on GPU

Science.gov (United States)

Al-Oraiqat, Anas M.; Zori, Sergii A.

2018-03-01

This paper proposes the organization of a parallel computer system based on Graphic Processors Unit (GPU) for 3D stereo image synthesis. The development is based on the modified ray tracing method developed by the authors for fast search of tracing rays intersections with scene objects. The system allows significant increase in the productivity for the 3D stereo synthesis of photorealistic quality. The generalized procedure of 3D stereo image synthesis on the Graphics Processing Unit/Graphics Processing Clusters (GPU/GPC) is proposed. The efficiency of the proposed solutions by GPU implementation is compared with single-threaded and multithreaded implementations on the CPU. The achieved average acceleration in multi-thread implementation on the test GPU and CPU is about 7.5 and 1.6 times, respectively. Studying the influence of choosing the size and configuration of the computational Compute Unified Device Archi-tecture (CUDA) network on the computational speed shows the importance of their correct selection. The obtained experimental estimations can be significantly improved by new GPUs with a large number of processing cores and multiprocessors, as well as optimized configuration of the computing CUDA network.

An Optimized Multicolor Point-Implicit Solver for Unstructured Grid Applications on Graphics Processing Units

Science.gov (United States)

Zubair, Mohammad; Nielsen, Eric; Luitjens, Justin; Hammond, Dana

2016-01-01

In the field of computational fluid dynamics, the Navier-Stokes equations are often solved using an unstructuredgrid approach to accommodate geometric complexity. Implicit solution methodologies for such spatial discretizations generally require frequent solution of large tightly-coupled systems of block-sparse linear equations. The multicolor point-implicit solver used in the current work typically requires a significant fraction of the overall application run time. In this work, an efficient implementation of the solver for graphics processing units is proposed. Several factors present unique challenges to achieving an efficient implementation in this environment. These include the variable amount of parallelism available in different kernel calls, indirect memory access patterns, low arithmetic intensity, and the requirement to support variable block sizes. In this work, the solver is reformulated to use standard sparse and dense Basic Linear Algebra Subprograms (BLAS) functions. However, numerical experiments show that the performance of the BLAS functions available in existing CUDA libraries is suboptimal for matrices representative of those encountered in actual simulations. Instead, optimized versions of these functions are developed. Depending on block size, the new implementations show performance gains of up to 7x over the existing CUDA library functions.

Molecular Monte Carlo Simulations Using Graphics Processing Units: To Waste Recycle or Not?

Science.gov (United States)

Kim, Jihan; Rodgers, Jocelyn M; Athènes, Manuel; Smit, Berend

2011-10-11

In the waste recycling Monte Carlo (WRMC) algorithm, (1) multiple trial states may be simultaneously generated and utilized during Monte Carlo moves to improve the statistical accuracy of the simulations, suggesting that such an algorithm may be well posed for implementation in parallel on graphics processing units (GPUs). In this paper, we implement two waste recycling Monte Carlo algorithms in CUDA (Compute Unified Device Architecture) using uniformly distributed random trial states and trial states based on displacement random-walk steps, and we test the methods on a methane-zeolite MFI framework system to evaluate their utility. We discuss the specific implementation details of the waste recycling GPU algorithm and compare the methods to other parallel algorithms optimized for the framework system. We analyze the relationship between the statistical accuracy of our simulations and the CUDA block size to determine the efficient allocation of the GPU hardware resources. We make comparisons between the GPU and the serial CPU Monte Carlo implementations to assess speedup over conventional microprocessors. Finally, we apply our optimized GPU algorithms to the important problem of determining free energy landscapes, in this case for molecular motion through the zeolite LTA.

TESLA GPUs versus MPI with OpenMP for the Forward Modeling of Gravity and Gravity Gradient of Large Prisms Ensemble

Directory of Open Access Journals (Sweden)

Carlos Couder-Castañeda

2013-01-01

Full Text Available An implementation with the CUDA technology in a single and in several graphics processing units (GPUs is presented for the calculation of the forward modeling of gravitational fields from a tridimensional volumetric ensemble composed by unitary prisms of constant density. We compared the performance results obtained with the GPUs against a previous version coded in OpenMP with MPI, and we analyzed the results on both platforms. Today, the use of GPUs represents a breakthrough in parallel computing, which has led to the development of several applications with various applications. Nevertheless, in some applications the decomposition of the tasks is not trivial, as can be appreciated in this paper. Unlike a trivial decomposition of the domain, we proposed to decompose the problem by sets of prisms and use different memory spaces per processing CUDA core, avoiding the performance decay as a result of the constant calls to kernels functions which would be needed in a parallelization by observations points. The design and implementation created are the main contributions of this work, because the parallelization scheme implemented is not trivial. The performance results obtained are comparable to those of a small processing cluster.

Smulkaus ir vidutinio verslo konkurencingumas Lietuvoje

OpenAIRE

Vijeikis, Juozas; Makštutis, Antanas

2009-01-01

Straipsnio mokslinė problema, naujumas ir aktualumas. Konkurencingumas kaip įmonių efektyvios veiklos reiškinys yra aktualus šalies verslo gyvenime vykdant darnios ekonominės plėtros politiką. Ši politika kaip problema smulkaus ir vidutinio verslo (SVV) plėtrai ir konkurencingumui didinti nėra sistemiškai ištirta ir aprašyta Lietuvos sąlygomis mokslinėje ir praktinėje literatūroje. Vienas svarbiausių veiksnių, siekiant spartaus ekonominio augimo, yra darnios verslininkystės plėtra Lietuvoje n...

Analiza energijske učinkovitosti električnih pogonov v procesu hlajenja tehnološke vode

OpenAIRE

KOPRIVC, LUKA

2018-01-01

Električni pogonski sistemi (EPS) so že vrsto let nepogrešljiv člen v industriji. Sposobnost vodenja in prilagajanja bremenu nam omogoča večjo fleksibilnost in zanesljivost v sistemu in nenazadnje tudi bolj varčno porabo električne energije. S tega vidika je zelo pomemben izkoristek EPS, če lahko določamo delovne točke in iščemo optimalen izkoristek glede na trenutno konfiguracijo. Magistrsko delo obravnava metodo določanja dejanskega izkoristka EPS v industrijskem obratu. Cilj je bil, da ...

„X“ banko darbuotojų socializacijos organizacijoje tyrimas

OpenAIRE

Guzevičienė, Julija

2013-01-01

Magistro baigiamajame darbe išanalizuotas naujų darbuotojų socializacijos procesas, įvertinti konkrečios stambios finansinės institucijos naujų darbuotojų socializacijos trūkumai bei privalumai, pateikiamos išvados bei siūlymai organizacijai. Darbe iškelta problema – dažna darbuotojų kaita Lietuvos organizacijose, kuriai turi įtakos prasta naujų darbuotojų socializacija bei nepakankamas dėmesys šiam procesui, kuris privalo būti sistemiškai nukreiptas į visapusišką darbuotojų įsiliejimą į gamy...

MİLLÎ TARIM ENFORMASYON SİSTEMİ

Directory of Open Access Journals (Sweden)

Mustafa Akbulut

1986-06-01

Full Text Available İngiliz Tanm Enformasyon sistemi uzmanı G. Tansey, Türkiyede tarımın geliştirilmesi konusunda, köylü ve çiftçilerin eğitilmesi için Tarım Orman ve Köyişleri Bakanlığı bünyesinde kurulan Yayım ve Uygulamalı Araştırma Projesi hakkında bilgi vermekte, Bakanlıkta ve çeşitli kentlerde yapılan çalışmaları anlatmaktadır.

Recepcijska zmožnost mladega bralca – razvijanje recepcijske zmožnosti zaznavanja, doživljanja in vrednotenja književne osebe

OpenAIRE

Jerčič Pšeničnik, Simona

2016-01-01

V zadnjem desetletju smo priča spreminjanju bralnih navad otrok in mladostnikov. Opazen je premik od tradicionalnega branja knjig za zabavo do novih bralnih priložnosti, ki jih ponujajo internet in drugi multimedijski sistemi. Računalniki in druge naprave, ki sočasno prikazujejo besedilo, slike, filme in zvoke, so že splošno rabljena orodja, ki lahko pomagajo pri razvijanju otrokovih bralnih zmožnosti. Vsekakor pa ima pri tem pomembno vlogo učitelj, ki bi moral biti usposobljen za pogovor o l...

Radioisotopes as tracers for reactions in molten fluoride media; Les radioisotopes comme indicateurs des reactions se produisant dans des milieux de fluorures fondus; Ispol'zovanie radioizotopov v kachestve indikatorov dlya reaktsij v rasplavlennoj ftoristoj srede; Los radioisotopos como indicadores de las reacciones que tienen lugar en un medio de fluoruros fundidos

Energy Technology Data Exchange (ETDEWEB)

Grimes, W R; Shaffer, J H; Strehlow, R A; Ward, W T; Watson, G M [Oak Ridge National Laboratory, Oak Ridge, TN (United States)

1962-03-15

produce un aumento de la concentracion de radioisotopos en la solucion, de conformidad con la ley de accion de masas. Cuando se enfrian ciertas mezclas de LiF y BeF{sub 2} fundidas que contengan CeF{sub 3} y fluoruros de las tierras raras, la fase primaria consiste en una solucion solida de los trifluoruros. Los autores han evaluado los equilibrios entre la solucion fundida y la solucion solida, para diversos pares de fluoruros. No han observado ninguna desviacion notable respecto de la ley de accion de masas. Los autores logran la separacion de diversas especies por precipitacion selectiva de los oxidos a partir de soluciones de fluoruros fundidos. (author) [Russian] Putem ispol'zovaniya sootvetstvuyushchikh radioizotopov i standartnykh metodov otscheta byli izucheny khimicheskie reaktsii, kotorye mogut okazat'sya poleznymi dlya udaleniya nekotorykh sostavnykh chastej iz rasplavlennykh ftoristykh rastvorov. Byli izucheny sleduyushchie kategorii reaktsij: 1) izotopnyj obmen mezhdu rastvorennym indikatorom i nerastvorimymi slozhnymi veshchestvami; 2) raspredelenie rastvorennogo indikatora mezhdu rasplavom i rastvorom analogichnogo slozhnogo veshchestva v tverdom sostoyanii i 3) osazhdenie radioizotopa v kachestve nerastvorimogo slozhnogo veshchestva. V tipichnykh ehksperimentakh nablyudalos', chto radioaktivnyj indikator LaF{sub 3} v rasplavakh LiF-NaF bystro obmenivaetsya na neaktivnyj La{sub 2}O{sub 3}. V ehtom rastvoritele analogichnyj bystryj obmen proiskhodit mezhdu radioaktivnym indikatorom CeF{sub 3} i neaktivnym CeO{sub 2}; trebuemoe v poslednem sluchae perenesenie ehlektrona ochevidno ne prepyatstvuet ehtoj reaktsii. V sootvetstvii s printsipom massovogo dejstviya dobavlenie k kazhdoj iz ehtikh sistem neaktivnogo CeF{sub 3} uvelichivalo soderzhanie radioaktivnogo indikatora v rastvore. Pri okhlazhdenii nekotorykh rasplavov ZiF-BeF{sub 2}, soderzhashchikh CeF{sub 3}, i redkikh zemel' v kachestve pervichnoj fazy obrazuetsya tverdyj rastvor triftoristykh soedinenij

Universal Batch Steganalysis

Science.gov (United States)

2014-06-30

steganalysis) in large-scale datasets such as might be obtained by monitoring a corporate network or social network. Identifying guilty actors...guilty’ user (of steganalysis) in large-scale datasets such as might be obtained by monitoring a corporate network or social network. Identifying guilty...floating point operations (1 TFLOPs) for a 1 megapixel image. We designed a new implementation using Compute Unified Device Architecture (CUDA) on NVIDIA

CUDA GPU based full-Stokes finite difference modelling of glaciers

DEFF Research Database (Denmark)

Brædstrup, Christian; Egholm, D.L.

advances in graphics card (GPU) technology for high performance computing have proven extremely efficient in accelerating many large scale scientific com- putations. The general purpose GPU (GPGPU) technology is cheap, has a low power consumption and fits into a normal desktop computer. It could therefore...... to minimize the short wavelength errors efficiently. This reduces the iteration count by several orders of magnitude. The run-time is further reduced by using the GPGPU technology where each card has up to 448 cores. Researchers utilizing the GPGPU technique in other areas have reported between 2 - 11 times...

CUDA GPU based full-Stokes finite difference modelling of glaciers

Science.gov (United States)

Brædstrup, C. F.; Egholm, D. L.

2012-04-01

Many have stressed the limitations of using the shallow shelf and shallow ice approximations when modelling ice streams or surging glaciers. Using a full-stokes approach requires either large amounts of computer power or time and is therefore seldom an option for most glaciologists. Recent advances in graphics card (GPU) technology for high performance computing have proven extremely efficient in accelerating many large scale scientific computations. The general purpose GPU (GPGPU) technology is cheap, has a low power consumption and fits into a normal desktop computer. It could therefore provide a powerful tool for many glaciologists. Our full-stokes ice sheet model implements a Red-Black Gauss-Seidel iterative linear solver to solve the full stokes equations. This technique has proven very effective when applied to the stokes equation in geodynamics problems, and should therefore also preform well in glaciological flow probems. The Gauss-Seidel iterator is known to be robust but several other linear solvers have a much faster convergence. To aid convergence, the solver uses a multigrid approach where values are interpolated and extrapolated between different grid resolutions to minimize the short wavelength errors efficiently. This reduces the iteration count by several orders of magnitude. The run-time is further reduced by using the GPGPU technology where each card has up to 448 cores. Researchers utilizing the GPGPU technique in other areas have reported between 2 - 11 times speedup compared to multicore CPU implementations on similar problems. The goal of these initial investigations into the possible usage of GPGPU technology in glacial modelling is to apply the enhanced resolution of a full-stokes solver to ice streams and surging glaciers. This is a area of growing interest because ice streams are the main drainage conjugates for large ice sheets. It is therefore crucial to understand this streaming behavior and it's impact up-ice.

Accelerating wavelet-based video coding on graphics hardware using CUDA

NARCIS (Netherlands)

Laan, van der W.J.; Roerdink, J.B.T.M.; Jalba, A.C.; Zinterhof, P.; Loncaric, S.; Uhl, A.; Carini, A.

2009-01-01

The DiscreteWavelet Transform (DWT) has a wide range of applications from signal processing to video and image compression. This transform, by means of the lifting scheme, can be performed in a memory and computation efficient way on modern, programmable GPUs, which can be regarded as massively

Accelerating Wavelet-Based Video Coding on Graphics Hardware using CUDA

NARCIS (Netherlands)

Laan, Wladimir J. van der; Roerdink, Jos B.T.M.; Jalba, Andrei C.; Zinterhof, P; Loncaric, S; Uhl, A; Carini, A

2009-01-01

The Discrete Wavelet Transform (DWT) has a wide range of applications from signal processing to video and image compression. This transform, by means of the lifting scheme, can be performed in a memory mid computation efficient way on modern, programmable GPUs, which can be regarded as massively

Parallelization of maximum likelihood fits with OpenMP and CUDA

CERN Document Server

Jarp, S; Leduc, J; Nowak, A; Pantaleo, F

2011-01-01

Data analyses based on maximum likelihood fits are commonly used in the high energy physics community for fitting statistical models to data samples. This technique requires the numerical minimization of the negative log-likelihood function. MINUIT is the most common package used for this purpose in the high energy physics community. The main algorithm in this package, MIGRAD, searches the minimum by using the gradient information. The procedure requires several evaluations of the function, depending on the number of free parameters and their initial values. The whole procedure can be very CPU-time consuming in case of complex functions, with several free parameters, many independent variables and large data samples. Therefore, it becomes particularly important to speed-up the evaluation of the negative log-likelihood function. In this paper we present an algorithm and its implementation which benefits from data vectorization and parallelization (based on OpenMP) and which was also ported to Graphics Processi...

Simulation of reaction–diffusion processes in three dimensions using CUDA

NARCIS (Netherlands)

Molnár Jr., Ferenc; Izsak, F.; Mészáros, Róbert; Lagzi, István

2011-01-01

Numerical solution of reaction–diffusion equations in three dimensions is one of the most challenging applied mathematical problems. Since these simulations are very time consuming, any ideas and strategies aiming at the reduction of CPU time are important topics of research. A general and robust

Real-Time Generic Face Tracking in the Wild with CUDA

NARCIS (Netherlands)

Cheng, Shiyang; Asthana, Akshay; Asthana, Ashish; Zafeiriou, Stefanos; Shen, Jie; Pantic, Maja

We present a robust real-time face tracking system based on the Constrained Local Models framework by adopting the novel regression-based Discriminative Response Map Fitting (DRMF) method. By exploiting the algorithm's potential parallelism, we present a hybrid CPU-GPU implementation capable of

Electronic methods for discriminating scintillation shapes; Methodes electroniques de discrimination des formes des impulsions issues de scintillateurs; Ehlektronnye metody diskriminatsii form stsintillyatsii; Metodos electronicos de discriminacion de forma de impulsos de centelleo

Energy Technology Data Exchange (ETDEWEB)

Forte, M; Konsta, A; Maranzana, C [European Atomic Energy Community, CCR, ISPRA (Italy)

1962-04-15

hasta impulsos debiles, de unas cuantas decenas de fotoelectrones, y la discriminacion de fragmentos emitidos por captura neutronica en liquidos conteniendo boro. Algunas de estas redes fueron capaces de operar con impulsos de la misma polaridad emitidos por dos de los ultimos dinodos, incluso con la salida de un solo electrodo. Ello puede ser util cuando conviene emplear el anodo independientemente, por ejemplo, para sincronizacion. (author) [Russian] Kak uzhe soobshchalos' ran'she, forma stsintillyatsionnogo impul'sa, kharakterizuyushchaya tip vozbuzhdayushchej chastitsy (ehlektron, proton, al'fa i t.d.), mozhet byt' prevrashchena v nezavisimyj ot amplitudy impul'sa parametr. EHto pozvolyaet vyyavit' posredstvom mnogokanal'nogo analizatora sostav vozbuzhdayushchego stsintillyator puchka so smeshannymi chastitsami. EHtot metod byl uspeshno primenen k neskol'kim stsintillyatoram kak organicheskogo, tak i neorganicheskogo tipa. Privodyatsya detali ehlektronnykh metodik, ispol'zovannykh dlya preobrazovaniya formy impul'sov. Dlya bolee prostykh sluchaev diskriminatsii tol'ko mezhdu dvumya vidami impul'sov (naprimer, diskriminatsiya nejtronov ot gamma-izluchenij) rassmatrivalas' takzhe vozmozhnost' ispol'zovaniya passivnykh skhem, predstavlyayushchikhsya perspektivnymi dlya dal'nejshikh usovershenstvovanij i uproshchenij. Bylo isprobovano neskol'ko skhem, glavnym rezul'tatom chego bylo to, chto pri nalichii fona gamma-izlucheniya udalos' rasprostranit' diskriminatsiyu protonov otdachi v zhidkikh stsintillyatorakh na malye impul'sy vsego lish' v neskol'ko desyatkov fotoehlektronov, a takzhe dobit'sya diskriminatsii oskolkov zakhvata nejtronov v soderzhashchikh bor zhidkostyakh. Nekotorye iz ehtikh skhem byli prednaznacheny dlya raboty s impul'sami odinakovoj polyarnosti, podavaemymi dvumya poslednimi ehlektrodami umnozhitelya, ili dazhe s vykhodnymi impul'sami odnogo lish' ehlektroda. EHto mozhet okazat'sya poleznym pri nezavisimom ispol'zovanii anoda, naprimer, dlya

Critical experiments and nuclear calculations - LAMPRE-I; Experiences critiques et calculs nucleaires concernant le LAMPRE-I; Kriticheskie opyty i yadernye raschety - LAMPRE-I; Experimentos criticos u calculos nucleares relativos al LAMPRE-I

Energy Technology Data Exchange (ETDEWEB)

Battat, M E [Los Alamos Scientific Laboratory, University of California, Los Alamos, NM (United States)

1962-03-15

1 megavatt, aktivnaya zona kotorogo soderzhit rasplavlennyj splav plutoniya i zheleza (90 atomnykh protsentov plutoniya, 10 atomnykh protsentov zheleza pri tochke plavleniya v 410{sup o} TS). Regulirovka reaktivnosti obespechena putem ispol'zovaniya otrazhatelya iz nerzhaveyushchej stali i chetyrekh nikelievykh reguliruyushchikh sterzhnej, raspolozhennykh vne aktivnoj zony. Byli provedeny opyty pri temperaturakh aktivnoj zony v 80, 160 i 480 deg. TS s tem, chtoby opredelit' kriticheskuyu massu i tsennost' otrazhatelya pri kazhdoj iz ehtikh temperatur. Byli izmereny temperaturnyj koehffitsient reaktivnosti, a takzhe tsennost' reguliruyushchikh sterzhnej po izmereniyam perioda. Byli sdelany raschety s ispol'zovaniem metoda S{sub n} dlya resheniya problemy perenosa nejtronov, chtoby opredelit' osnovnye yadernye parametry sistemy. Sravnenie mezhdu raschetnymi i izmerennymi velichinami parametrov takikh kak temperaturnyj koehffitsient, tsennost' reguliruyushchikh ehlementov i kriticheskaya massa predstavlyayut takzhe interes v otsenke nadezhnosti proektnykh raschetov. (author)

Scalable Learning for Geostatistics and Speaker Recognition

Science.gov (United States)

2011-01-01

Device Architecture (CUDA)[63], a parallel programming model that leverages the parallel compute engine in NVIDIA GPUs to solve general purpose...validation. 3.1 Geospatial data reconstruction Sensors deployed on satellites are often used to collect enviromental data where a direct measurement is...same decision as training a model on B and testing on A, which is desirable in many recognition engines . We shall address this in the next chapter. The

Engineering a static verification tool for GPU kernels

OpenAIRE

Bardsley, E; Betts, A; Chong, N; Collingbourne, P; Deligiannis, P; Donaldson, AF; Ketema, J; Liew, D; Qadeer, S

2014-01-01

We report on practical experiences over the last 2.5 years related to the engineering of GPUVerify, a static verification tool for OpenCL and CUDA GPU kernels, plotting the progress of GPUVerify from a prototype to a fully functional and relatively efficient analysis tool. Our hope is that this experience report will serve the verification community by helping to inform future tooling efforts. ? 2014 Springer International Publishing.

Design Tools for Accelerating Development and Usage of Multi-Core Computing Platforms

Science.gov (United States)

2014-04-01

Government formulated or supplied the drawings, specifications, or other data does not license the holder or any other person or corporation ; or convey...multicore PDSP platforms. The GPU- based capabilities of TDIF are currently oriented towards NVIDIA GPUs, based on the Compute Unified Device Architecture...CUDA) programming language [ NVIDIA 2007], which can be viewed as an extension of C. The multicore PDSP capabilities currently in TDIF are oriented

Tritium Studies in the United States. Geological Survey; Le tritium dans les etudes entreprises par le Service Geologique des Etats-Unis; Izuchenie tritiya v svyazi s geologicheskim obsledovaniem ssha; El tritio en los estudios del Servicio Geologico de los Estados Unidos

Energy Technology Data Exchange (ETDEWEB)

Carlston, C W; Thatcher, L L [United States Geological Survey, Washington, DC (United States)

1962-01-15

hydrogeno-etileno son las mas satisfactorias. Se ha estudiado el enriquecimiento electrolitico con el proposito de mejorar la reproductibilidad del metodo y de evaluar los factores de separacion en diferentes condiciones experimentales. Se ha encontrado un prodecimiento que permite recuperar regularmente el 75 por ciento del tritio. Los principales trabajos efectuados en el terreno consisten en: 1. Un estudio realizado con ayuda de tritio en la llanura costera de Nueva Jersey, el cual indica que debajo del nivel freatico el agua aparece dispuesta en capas de diferentes edades. 2. Estudios en dos macizos autoctonos diferentes con el fin de determinar el comportamiento del tritio precipitado a raiz de los ensayos termonucleares realizados en 1958. 3. Utilizacion del tritio para determinar la renovacion del agua subterranea en las areniscas terciarias subyacentes a los altiplanos semiaridos de Nuevo Mexico. 4. Un estudio del contenido de tritio en las aguas subterraneas de la llanura del Snake River-en Idaho, que se lleva a cabo en procura de datos sobre la edad, los caudales y la direccion de cir, culacion del agua. 5. La determinacion de la capacidad de un deposito subterraneo proximo a Carlsbad, Nuevo Mexico, usando tritio industrial como indicador. (author) [Russian] Upravlenie geologicheskogo obsledovaniya provodit issledovatel'skuyu programmu kak po linii laboratornogo analiza tritiya, tak i v tselom ryade proektov na mestakh, napravlennykh na izuchenie vozmozhnoj foli tritiya v gidrologicheskikh izyskaniyakh. Laboratornye issledovaniya byli predprinyaty s tsel'yu usovershenstvovaniya tekhniki otschetov impul'sov gazovoj fazy, a takzhe s tsel'yu razrabotki prostykh priborov, prisposoblennykh dlya vypolneniya programmy dolgosrochnogo gidrologicheskogo obsledovaniya . Izuchenie razlichnykh prigodnykh dlya scheta gazovykh smesej pokazyvaet na preimushchestva smesej' vodoroda s ehfirom i vodoroda s ehtilenom. Bylo izucheno ehlekroliticheskoe obogashchenie s tsel

Initial Operating Experience with the ''NPD'' Reactor; Experience recueillie pendant les premiers mois de fonctionnement du reacteur NPD; Pervyj opyt po ehkspluatatsii reaktora NPD; Experiencia inicial de funcionamiento del reactor NPD

Energy Technology Data Exchange (ETDEWEB)

McConnell, L. G. [Hydro-Electric Power Commission of Ontario, Toronto, Ontario (Canada)

1963-10-15

fueron satisfactorios-, el primer ensayo de explotacion, que duro seis semanas, permitio alcanzar un factor de potencia del 70%. Los perfeccionamientos introducidos han permitido mejorar el grado de seguridad y el rendimiento, y han revelado la posibilidad de reducir los gastos de inversion en centrales futuras. Por ejemplo, se han modificado las empaquetaduras de las bombas del circuito primario de refrigeracion para alcanzar mayor rendimiento; el equipo de recuperacion de vapor por congelacion ha sido sustituido por columnas de absorcion a fin de reducir las perdidas de vapor de agua pesada; se estan instalando limitadores de flujo en algunas tuberias para disminuir las perdidas de agua pesada en el caso de averias en las juntas. En diciembre de 1962, dos escapes simultaneos que se produjeron en el aparato de realimentacion del reactor en marcha dieron origen a una serie de incidentes poco comunes; una cantidad considerable de agua pesada a alta presion y temperatura se derramo en el recinto del reactor, alterandose ligeramente su pureza isotopica. Luego de purificarse el agua, el reactor pudo reiniciar su funcionamiento a fines del mes. Todos los dispositivos de seguridad y en especial los destinados a evitar los escapes de agua pesada funcionaron correctamente durante el incidente. (author) [Russian] Rassmatrivaetsya pervaya yadernaya ehlektrostantsiya Kanady, demonstratsionnaya ehlektrostantsiya, prednaznachennaya dlya ispytaniya ehkspluatatsionnykh kachestv stantsij kanadskogo tipa, ispol'zuyushchikh v kachestve topliva prirodnyj uran, a v kachestve zamedlitelya i teplonositelya - tyazheluyu vodu. 28 iyunya 1962 goda ehta stantsiya dostigla polnoj moshchnosti. Nesmotrya na to, chto ona proektirovalas' dlya raooty na bazovoj nagruzke, v techenie pervykh stadij ona budet chast' vremeni rabotat' na vysokikh urovnyakh moshchnosti i chast' vremeni - na ponizhennykh moshchnostyakh dlya v-neseniya usovershenstvovanij. Do sikh por nablyudalsya progress; pervyj period

Direct measurement of the half-life of Rb{sup 87}; Mesure directe de la periode du rubidium-87; Pryamoe izmerenie poluraspada rubidiya-87; Medicion directa del periodo del {sup 87}Rb

Energy Technology Data Exchange (ETDEWEB)

McNair, A; Wilson, H W [United Kingdom Atomic Energy Authority, Aldermaston, Berks. (United Kingdom)

1962-01-15

especial atencion a una reduccion del espesor de la fuente y de su soporte. Los autores han recurrido a diversos procedimientos para aumentar la precision de las mediciones. El espesor de la fuente se redujo empleando: i) un contador proporcional 4 {pi} de gran superficie util (hasta 100 cm{sup 2}), ii) un circuito de anticoincidencias para disminuir la intensidad de la radiacion de fondo, y iii) {sup 87}Rb enriquecido, lo que permite reducir a la cuarta parte el espesor de la fuente para una actividad dada. De esta forma, se han podido medir fuentes hasta de 5 {mu}g/cm{sup 2}. Tambien examinaron la relacion entre el periodo de semidesintegracion y el espesor de la fuente, a fin de poder introducir una correccion para tener en cuenta la debil absorcion remanente. El efecto del espesor del soporte de la fuente no estan considerable y puede calcularse partiendo: i) de la diferencia entre la velocidad de recuento en ambos lados de los delgados soportes utilizados, y ii) de un estudio de la relacion existente entre el periodo de semidesintegracion y el espesor del soporte de la fuente. Estos experimentos dan un valor aproximado de 5,25 x 10{sup 12} anos para el periodo de semidesintegracion del {sup 87}Rb. (author) [Russian] Period poluraspada Rb''8''7 izmeryalsya neposredstvenno putem opredeleniya spetsificheskoj aktivnosti metodom scheta. Poluchennye ranee periody poluraspada nakhodyatsya v predelakh 4 - 6 kh 10''1''0 let s velichinoj, kotoraya beretsya obychno v 5 kh 10''1''0 let. Metod pryamogo scheta yavlyaetsya dovol'no slozhnym iz-za nalichiya bol'shogo chisla ehlektronov ochen' maloj ehnergii v spektre rubidiya-87. Odnako ves'ma aktual'nym yavlyaetsya poluchenie tochnoj velichiny metodom scheta, t.e. to, chto avtory pytalis' prodelat'. V ehtikh izmereniyakh sleduet udelit' osoboe vnimanie umen'sheniyu tolshchiny istochnika i ego podkladki. Dlya uvelicheniya tochnosti izmerenij byli ispol'zovany sleduyushchie metody. Tolshchina istochnika umen'shalas' putem ispol

Batteryless {gamma}-Ray Dosimeter; Dosimetre de rayons {gamma}, sans batteries; {gamma}-dozimetr bez batarei; Dosimetro a rayos {gamma} sin bateria

Energy Technology Data Exchange (ETDEWEB)

Gross, Bernhard [National Institute of Technology, Rio de Janeiro (Brazil)

1960-06-15

The Compton current produced by X-rays and {gamma}-rays in the 0.3 to 3 MeV range is proportional to the radiant energy flux. Therefore the intensity of the current can be used as a measure of radiation dose. The present paper describes a radiation receiver and electrical measuring system suitable for Compton current measurements and results obtained with this device under irradiation from a 2000 curie Co{sup 60} source. (author) [French] Le courant de Compton produit par des rayons X et {gamma} dans le domaine d'energies compris entre 0,3 et 3 MeV est proportionnel au flux d'energie rayonnante. C'est pourquoi l'intensite du courant peut servir de mesure de la dose de rayonnements. Le memoire decrit un ensemble, appareil recepteur de rayonnements et appareil de mesure electrique, permettant de mesurer le courant de Compton et il expose les resultats obtenus, au moyen de ce dispositif, sous irradiation par une source de Co{sup 60} de 2000 curies. (author) [Spanish] La corriente de Compton producida por rayos X y rayos {gamma} de energia comprendida entre 0,3 y 3 MeV es proporcional al flujo de energia radiante. Por consiguiente, la intensidad de la corriente puede servir para medir la dosis de radiacion. En este trabajo se describen un receptor de radiaciones y un sistema de medicion electrica apropiados para determinar la intensidad de la corriente de Compton, asi como los resultados obtenidos mediante este dis- positivo cuando se irradia con una fuente de Co{sup 60} de 2000 curies. (author) [Russian] Komptonovskij potok, obrazuemyj rentgenovskim i luchami i {gamma}-luchami v predelakh ot 0,3 do 3 mehv, proportsionale n potoku luchistoj ehnergii. Poehtomu intensivnost' potoka mozhet byt' ispol'zovana dlya izmereniya dozy radiatsii. V nastoyashchem dokumente opisyvayutsya radiatsionny j priemnik i ehlektricheskaya izmeritel'naya sistema, prigodnye dlya izmerenij s pomoshch'yu komptonovskog o potoka, i rezul'taty, poluchennye s pomoshch'yu ehtogo ustrojstva v khode

Development of Geiger-Mueller counters for operation at high temperatures; Mise au point de compteurs Geiger-Mueller fonctionnant a haute temperature; Razrabotka schetchikov Gejgera-Myullera, rabotayushchikh pri povyshennoj temperature; Contadores Geiger-Mueller que funcionan a temperaturas elevadas

Energy Technology Data Exchange (ETDEWEB)

Draghicescu, M [Institut de Physique Atomique, Bucarest (Romania)

1962-04-15

Counters of this type are necessary for radioactive logging at great depths; they have to operate normally at temperatures up to 180{sup o}C. In order to preserve their characteristics under such conditions, the work function of the cathode has been improved by a special treatment. Tests have been made on counters with graphite, copper and wolfram cathodes in a glass envelope. The method is simple, and can easily be employed in industry. (author) [French] De tels compteurs sont necessaires pour le sondage radioactif aux grandes profondeurs; ils doivent fonctionner dans des conditions normales jusqu'a la temperature de 180{sup o}C. Afin qu'ils puissent conserver leurs caracteristiques jusqu'a cette temperature, on a agi sur le travail de sortie de la cathode par un traitement adequat. On a fait l'essai sur des compteurs avec cathode de graphite, de cuivre ou de tungstene, dans un ballon de verre. La methode proposee est simple et peut etre appliquee facilement dans l'industrie. (author) [Spanish] Se requiere este tipo de contador para la determinacion de la radiactividad a grandes profundidades; debe ser capaz de funcionar normalmente a temperaturas hasta de 180{sup o}C. A fin de que sus caracteristicas se conserven inalteradas hasta tales temperaturas, se ha modificado la funcion de trabajo del catodo mediante un tratamiento adecuando. Se han ensayado contadores con catodo de grafito, de cobre o de wolframio en un balon de vidrio. El metodo propuesto es simple y puede aplicarse facilmente en la industria. (author) [Russian] Podobnye schetchiki neobkhodimy dlya radioaktivnogo karottazha na bol'shikh glubinakh; oni dolzhny funktsionirovat' v normal'nykh usloviyakh pri temperature do 180{sup o}C. Nakonets, dlya togo, chtoby oni mogli sokhranyat' svoi osobennosti pri ehtoj temperature, bylo obrashcheno vnimanie na rabotu katodnogo vykhoda pri pomoshchi sootvetstvuyushchej obrabotki. Byl proveden opyt na schetchikakh s grafitovym, mednym ili vol'framovym katodom v

VPLIV POSTAVE TELESA IN VELIKOSTNE ŠTEVILKE NA IZBOR OBLAČILA

OpenAIRE

Selko, Urška

2011-01-01

Postave teles se med seboj razlikujejo ne le od države do države, temveč tudi znotraj držav. Zato obstajajo glede na ciljne populacije številni velikostni sistemi in različna označevanja velikosti oblačil. V diplomskem delu je bil raziskan vpliv postave telesa in velikostne številke na odločitev o nakupu oblačila. V ta namen je bila izvedena anketa preko spletnega računa. Anketirana je bila ženska populacija dveh starostnih skupin, med 19. in 30. letom ter med 31. in 40. letom. Rezultati razi...

Lactococcus garvieae Suşlarının Antimikrobiyal Duyarlılıklarının Belirlenmesi

OpenAIRE

KUBILAY, Ayşegül; ALTUN, Soner; ULUKÖY, Gülşen; DILER, Öznur

2005-01-01

Bu çalışmada, 9 farklı Lactococcus garveiae suşlanmn Mueller-Hinton agarda disk diffüzyon tekniği ile ATB VET (Biomerieux 14 289) strip sistemi kullanılarak antimikrobiyal duyarlılıklarının yanısıra E testi (AB BIODISK) ile de Eritromycin antibiyotiğinin MIK(Minimal inhibitör konsantrasyonu) değerleri incelenmiştir. L.garvieae suşlarının; disk diffüzyon testi ve ATB VET sistemine göre Amoxicillin+clavulanic acid, Ampicillin, Enrofloxacin, Vancomycin, Tetracycline, Doxycycline, Chloramphenicol...

WOLFRAM (DIDMOAD) SENDROMU BULUNAN BİR OLGUDAKİ ORAL BULGULAR (OLGU BİLDİRİMİ)

OpenAIRE

Hatipoğlu, Hasan; Hatipoğlu, Müjgan Güngör; Kansu, Özden

2018-01-01

Wolfram Sendromu, nadir görülen konjenital, birçok sistemi etkileyebilen sendromdur. Diabetes mellitus,diabetes insipidus, optik atrofi ve sağırlık ile karakterizedir. Hastalarda nörolojik rahatsızlıklar ile üriner sistemrahatsızlıkları ve psikolojik rahatsızlıklar da izlenir. Diabetes mellitus ve optik atrofi ilk ortaya çıkan bulgulardır.Bu olgu raporunda 20 yaşındaki Wolfram sendromlu erkek hastanın klinik ve radyografik ağız bulgularısunulmaktadır.

Personal Supercomputing for Monte Carlo Simulation Using a GPU

Energy Technology Data Exchange (ETDEWEB)

Oh, Jae-Yong; Koo, Yang-Hyun; Lee, Byung-Ho [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

2008-05-15

Since the usability, accessibility, and maintenance of a personal computer (PC) are very good, a PC is a useful computer simulation tool for researchers. It has enough calculation power to simulate a small scale system with the improved performance of a PC's CPU. However, if a system is large or long time scale, we need a cluster computer or supercomputer. Recently great changes have occurred in the PC calculation environment. A graphic process unit (GPU) on a graphic card, only used to calculate display data, has a superior calculation capability to a PC's CPU. This GPU calculation performance is a match for the supercomputer in 2000. Although it has such a great calculation potential, it is not easy to program a simulation code for GPU due to difficult programming techniques for converting a calculation matrix to a 3D rendering image using graphic APIs. In 2006, NVIDIA provided the Software Development Kit (SDK) for the programming environment for NVIDIA's graphic cards, which is called the Compute Unified Device Architecture (CUDA). It makes the programming on the GPU easy without knowledge of the graphic APIs. This paper describes the basic architectures of NVIDIA's GPU and CUDA, and carries out a performance benchmark for the Monte Carlo simulation.

Performance studies of GooFit on GPUs vs RooFit on CPUs while estimating the statistical significance of a new physical signal

Science.gov (United States)

Di Florio, Adriano

2017-10-01

In order to test the computing capabilities of GPUs with respect to traditional CPU cores a high-statistics toy Monte Carlo technique has been implemented both in ROOT/RooFit and GooFit frameworks with the purpose to estimate the statistical significance of the structure observed by CMS close to the kinematical boundary of the J/ψϕ invariant mass in the three-body decay B + → J/ψϕK +. GooFit is a data analysis open tool under development that interfaces ROOT/RooFit to CUDA platform on nVidia GPU. The optimized GooFit application running on GPUs hosted by servers in the Bari Tier2 provides striking speed-up performances with respect to the RooFit application parallelised on multiple CPUs by means of PROOF-Lite tool. The considerable resulting speed-up, evident when comparing concurrent GooFit processes allowed by CUDA Multi Process Service and a RooFit/PROOF-Lite process with multiple CPU workers, is presented and discussed in detail. By means of GooFit it has also been possible to explore the behaviour of a likelihood ratio test statistic in different situations in which the Wilks Theorem may or may not apply because its regularity conditions are not satisfied.

Papaya Tree Detection with UAV Images Using a GPU-Accelerated Scale-Space Filtering Method

Directory of Open Access Journals (Sweden)

Hao Jiang

2017-07-01

Full Text Available The use of unmanned aerial vehicles (UAV can allow individual tree detection for forest inventories in a cost-effective way. The scale-space filtering (SSF algorithm is commonly used and has the capability of detecting trees of different crown sizes. In this study, we made two improvements with regard to the existing method and implementations. First, we incorporated SSF with a Lab color transformation to reduce over-detection problems associated with the original luminance image. Second, we ported four of the most time-consuming processes to the graphics processing unit (GPU to improve computational efficiency. The proposed method was implemented using PyCUDA, which enabled access to NVIDIA’s compute unified device architecture (CUDA through high-level scripting of the Python language. Our experiments were conducted using two images captured by the DJI Phantom 3 Professional and a most recent NVIDIA GPU GTX1080. The resulting accuracy was high, with an F-measure larger than 0.94. The speedup achieved by our parallel implementation was 44.77 and 28.54 for the first and second test image, respectively. For each 4000 × 3000 image, the total runtime was less than 1 s, which was sufficient for real-time performance and interactive application.

Personal Supercomputing for Monte Carlo Simulation Using a GPU

International Nuclear Information System (INIS)

Oh, Jae-Yong; Koo, Yang-Hyun; Lee, Byung-Ho

2008-01-01

Since the usability, accessibility, and maintenance of a personal computer (PC) are very good, a PC is a useful computer simulation tool for researchers. It has enough calculation power to simulate a small scale system with the improved performance of a PC's CPU. However, if a system is large or long time scale, we need a cluster computer or supercomputer. Recently great changes have occurred in the PC calculation environment. A graphic process unit (GPU) on a graphic card, only used to calculate display data, has a superior calculation capability to a PC's CPU. This GPU calculation performance is a match for the supercomputer in 2000. Although it has such a great calculation potential, it is not easy to program a simulation code for GPU due to difficult programming techniques for converting a calculation matrix to a 3D rendering image using graphic APIs. In 2006, NVIDIA provided the Software Development Kit (SDK) for the programming environment for NVIDIA's graphic cards, which is called the Compute Unified Device Architecture (CUDA). It makes the programming on the GPU easy without knowledge of the graphic APIs. This paper describes the basic architectures of NVIDIA's GPU and CUDA, and carries out a performance benchmark for the Monte Carlo simulation

High-order finite-element seismic wave propagation modeling with MPI on a large GPU cluster

International Nuclear Information System (INIS)

Komatitsch, Dimitri; Erlebacher, Gordon; Goeddeke, Dominik; Michea, David

2010-01-01

We implement a high-order finite-element application, which performs the numerical simulation of seismic wave propagation resulting for instance from earthquakes at the scale of a continent or from active seismic acquisition experiments in the oil industry, on a large cluster of NVIDIA Tesla graphics cards using the CUDA programming environment and non-blocking message passing based on MPI. Contrary to many finite-element implementations, ours is implemented successfully in single precision, maximizing the performance of current generation GPUs. We discuss the implementation and optimization of the code and compare it to an existing very optimized implementation in C language and MPI on a classical cluster of CPU nodes. We use mesh coloring to efficiently handle summation operations over degrees of freedom on an unstructured mesh, and non-blocking MPI messages in order to overlap the communications across the network and the data transfer to and from the device via PCIe with calculations on the GPU. We perform a number of numerical tests to validate the single-precision CUDA and MPI implementation and assess its accuracy. We then analyze performance measurements and depending on how the problem is mapped to the reference CPU cluster, we obtain a speedup of 20x or 12x.

Statistical significance estimation of a signal within the GooFit framework on GPUs

Directory of Open Access Journals (Sweden)

Cristella Leonardo

2017-01-01

Full Text Available In order to test the computing capabilities of GPUs with respect to traditional CPU cores a high-statistics toy Monte Carlo technique has been implemented both in ROOT/RooFit and GooFit frameworks with the purpose to estimate the statistical significance of the structure observed by CMS close to the kinematical boundary of the J/ψϕ invariant mass in the three-body decay B+ → J/ψϕK+. GooFit is a data analysis open tool under development that interfaces ROOT/RooFit to CUDA platform on nVidia GPU. The optimized GooFit application running on GPUs hosted by servers in the Bari Tier2 provides striking speed-up performances with respect to the RooFit application parallelised on multiple CPUs by means of PROOF-Lite tool. The considerable resulting speed-up, evident when comparing concurrent GooFit processes allowed by CUDA Multi Process Service and a RooFit/PROOF-Lite process with multiple CPU workers, is presented and discussed in detail. By means of GooFit it has also been possible to explore the behaviour of a likelihood ratio test statistic in different situations in which the Wilks Theorem may or may not apply because its regularity conditions are not satisfied.

An implementation of the direct-forcing immersed boundary method using GPU power

Directory of Open Access Journals (Sweden)

Bulent Tutkun

2017-01-01

Full Text Available A graphics processing unit (GPU is utilized to apply the direct-forcing immersed boundary method. The code running on the GPU is generated with the help of the Compute Unified Device Architecture (CUDA. The first and second spatial derivatives of the incompressible Navier-Stokes equations are discretized by the sixth-order central compact finite-difference schemes. Two flow fields are simulated. The first test case is the simulated flow around a square cylinder, with the results providing good estimations of the wake region mechanics and vortex shedding. The second test case is the simulated flow around a circular cylinder. This case was selected to better understand the effects of sharp corners on the force coefficients. It was observed that the estimation of the force coefficients did not result in any troubles in the case of a circular cylinder. Additionally, the performance values obtained for the calculation time for the solution of the Poisson equation are compared with the values for other CPUs and GPUs from the literature. Consequently, approximately 3× and 20× speedups are achieved in comparison with GPU (using CUSP library and CPU, respectively. CUSP is an open-source library for sparse linear algebra and graph computations on CUDA.

Getting To Exascale: Applying Novel Parallel Programming Models To Lab Applications For The Next Generation Of Supercomputers

Energy Technology Data Exchange (ETDEWEB)

Dube, Evi [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Shereda, Charles [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Nau, Lee [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Harris, Lance [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

2010-09-27

As supercomputing moves toward exascale, node architectures will change significantly. CPU core counts on nodes will increase by an order of magnitude or more. Heterogeneous architectures will become more commonplace, with GPUs or FPGAs providing additional computational power. Novel programming models may make better use of on-node parallelism in these new architectures than do current models. In this paper we examine several of these novel models – UPC, CUDA, and OpenCL –to determine their suitability to LLNL scientific application codes. Our study consisted of several phases: We conducted interviews with code teams and selected two codes to port; We learned how to program in the new models and ported the codes; We debugged and tuned the ported applications; We measured results, and documented our findings. We conclude that UPC is a challenge for porting code, Berkeley UPC is not very robust, and UPC is not suitable as a general alternative to OpenMP for a number of reasons. CUDA is well supported and robust but is a proprietary NVIDIA standard, while OpenCL is an open standard. Both are well suited to a specific set of application problems that can be run on GPUs, but some problems are not suited to GPUs. Further study of the landscape of novel models is recommended.

Malzeme Taşıma Odaklı Planlama için Üretim Sistemlerindeki Tezgah Yerleşim Düzenlerinin Benzetim Analizi ile Karşılaştırılması

Directory of Open Access Journals (Sweden)

Mehmet AKSARAYLI

2009-02-01

Full Text Available Günümüzde işletmeler üretim maliyetlerini azaltmak ve verimliliklerinin artırmak için uygun tesis planları yapmak zorundadırlar. Çalışma, üretim sistemlerindeki tesis içi yerleşim problemlerinin çözümüne ulaşmakta kullanılan temel tezgâh yerleşim şekilleri ve ürüne göre yerleşim için önerilen yeni bir yaklaşımı birbirleriyle karşılaştıran bir çalışmadır. Çalışmada özellikle tezgâhlar arasındaki malzeme taşıma süreleri ve bu sürelerin toplam üretim süresi içerisindeki oranları ile ilgilenilmiştir. Buna ek olarak, incelenen tüm tezgâh yerleşim şekillerine göre benzetim modelleri sonucunda elde edilen tezgâhların kullanım yüzdeleri ve ürünlerin üretim miktarları da bu çalışma kapsamında aktarılmıştır. Çalışmada ilk olarak tesis planlamasında kullanılan temel yerleşim şekilleri için bir üretim sistemi tanımlanmıştır. Daha sonra tanımlanan üretim sistemi, her bir yerleşim şekli için tezgâh yerleşimi yapılmıştır. Ardından ürüne göre yerleşim şekli için önerilen yaklaşım aktarılarak üretim sistemi için tezgâh yerleşimi yapılmıştır. Daha sonra tezgâh yerleşim şekilleri "PROMODEL" benzetim yazılımı ortamına aktarılmıştır. Son olarak yapılan analizler ile farklı tezgâh yerleşim şekillerinin malzeme taşıma süreleri ve toplam üretim süresi içerisindeki oranları karşılaştırılmış ve analizlerden elde edilen sonuçlar yorumlanarak aktarılmıştır.

Sistemi finanziari basati sulle banche e sul mercato: realtà o finzione?

Directory of Open Access Journals (Sweden)

B. SCHOLTENS

2013-10-01

Full Text Available Many distinguish between financial systems with a dominant role for banks and those with a dominant role for financial markets, assuming this is of great importance for economic development. The author analyses why the distinction might matter, first by investigating how bank and market finance affect economic development. A framework to analyse the financial system is then developed. Finally, a comparative analysis of two so-called bank-oriented countries (Germany and Japan and two so-called market-oriented countries (the UK and the US is performed to reveal whether or not there are fundamental differences between their financial systems. The evidence does not support the idea of a distinction between bank- and market-based financial systems, with all four countries showing unique characteristics.  JEL Codes: G00Keywords: Economic development, Bank finance, Market finance

Systems and components for intelligent buildings; Sistemi e componenti per la domotica

Energy Technology Data Exchange (ETDEWEB)

Benzi, F. [Pavia Univ., Pavia (Italy). Dipt. di Elettronica

2001-06-01

The rapid development of automation and communication techniques involve also the intelligent buildings project. [Italian] Il rapido sviluppo delle tecniche di automazione e telecomunicazione investe anche la progettazione degli edifici intelligenti.

Sistemi WebGIS e Inventario IFFI per la Prevenzione nel Rischio Frane

Directory of Open Access Journals (Sweden)

Italo Di Giovanni

2013-02-01

Full Text Available Frane ed alluvioni sono molto frequenti sul territorio italiano: ciò è dovuto soprattutto alle caratteristiche geologico geomorfologiche (75% del territorio italiano è montano-collinare e quelle climatiche, che determinano un alto rischio idrogeologico dell’Italia con conseguente impatto a livello socio-economico, sia per il numero di vittime sia per i danni prodotti ad abitazioni, industrie, infrastrutture, beni culturali e ambientali, ed agricoltura.WebGIS system and IFFI Inventory for Prevention in Landslide RiskGeological, geomorphological and climatic characteristics determine a high landslide risk in Italy, with a consequent impacton the socio-economic level. As part of the IFFI Project, a WebGIS archive was created toprovide a framework of the distribution of landslides. Final result: nearby 485.000 landslides have been recorded in Italy. Moreover in Italy the remediation of the damages, due to landslides and floods, cost more than secure the lands. Today, in the framework of prevention, landslide monitoring cannot be ignored by the authorities allowing control conditions that can become extremely dangerous, with damages to property and/or people.

Database, expert systems, information retrieval; Banche dati, sistemi esperti e information retrieval

Energy Technology Data Exchange (ETDEWEB)

Fedele, P; Grandoni, G; Mammarella, M C [ENEA - Dipartimento Protezione Ambientale e Salute dell' Uomo, Centro Ricerche Energia, Casaccia (Italy)

1989-12-15

The great debate concerning the Italian high-school reform has induced a ferment of activity among the most interested and sensible of people. This was clearly demonstrated by the course 'Innovazione metodologico-didattica e tecnologie informatiche' organized for the staff of the 'lstituto Professionale L. Einaudi' of Lamezia Terme. The course was an interesting opportunity for discussions and interaction between the world of School and computer technology used in the Research field. This three day course included theoretical and practical lessons, showing computer facilities that could be useful for teaching. During the practical lessons some computer tools were presented from the very simple Electronic Sheets to the more complicated information Retrieval on CD-ROM interactive realizations. The main topics will be discussed later. They are: Modelling, Data Base, Integrated Information Systems, Expert Systems, Information Retrieval. (author)

La scuola confessionale nei sistemi anglosassoni.Tra incorporazione inglese e separatismo americano

Directory of Open Access Journals (Sweden)

Rita Benigni

2012-10-01

SOMMARIO: 1. Premessa - 2. L’istruzione popolare in Inghilterra: dal sostegno alle scuole confessionali alla riforma Gladstone - 3. La scuola confessionale nel sistema di pubblica istruzione: dalla riforma Gladstone ai nostri giorni. - 4. Il separatismo americano: le ragioni di una scelta e la sua incidenza sul sistema scolastico. - 5. Scuola confessionale ed establishment clause. La fase di strict separation. – 6. (segue L’affermazione di un separatismo attenuato. I voucher e le charter schools.

Sicurezza Territoriale e gestione delle emergenze: soluzioni ed architetture per sistemi collaborativi

Directory of Open Access Journals (Sweden)

Andrea Fiduccia

2010-03-01

Full Text Available Intergraph's solutions for PublicSafety & Security, Critical Infrastructures Protection and Emergency Operation Centers Intergraph provides the world’s leading public safety dispatch system, which is accessed by more than half a billion people worldwide when they dial for emergency response. Because coordination with public safetyagencies during a large-scale event is so critical, Intergraph’s Computer- Aided Dispatch (I/CAD system forms the basis for interagency coordination and management of operations andserves as the foundation of the decision support process. I/CAD seamlessly integrates an interactive, realtime map display with call handling, dispatching, records and information management, remote and field access, analysis and models. Intergraph’s systems meet IT security requirements – such as DIACAP – and dispatch interoperability (APCO, CAP without compromising performance. Built on standard interfaces, Intergraph products I/Sight, I/Sensor and I/Alarm Plus allow two-way communication with a variety of video, sensor and alarm types (I/Security Framework. At the same time, Intergraph offers a broad range of solutions for EmergencyOperations Centers (EOCs and crisis management systems (I/PR, I2RMS, GIOTTO.

Accelerating Calculations of Reaction Dissipative Particle Dynamics in LAMMPS

Science.gov (United States)

2017-05-17

HPC) resources and exploit emerging, heterogeneous architectures (e.g., co-processors and graphics processing units [GPUs]), while enabling EM...2 ODE solvers—CVODE* and RKF45—which we previously developed for NVIDIA Compute Unified Device Architecture (CUDA) GPUs.9 The CPU versions of both...nodes. Half of the accelerator nodes (178) have 2 NVIDIA Kepler K40m GPUs and the remaining 178 accelerator nodes have 2 Intel Xeon Phi 7120P co

The Methods of Implementation of the Three-dimensional Pseudorandom Number Generator DOZEN for Heterogeneous CPU/GPU /FPGA High-performance Systems

Directory of Open Access Journals (Sweden)

Nikolay Petrovich Vasilyev

2015-03-01

Full Text Available The paper describes the scope of information security protocols based on PRN G in industrial systems. A method for implementing three-dimensional pseudorandom number generator D O Z E N in hybrid systems is provided. The description and results of studies parallel CUDA-version of the algorithm for use in hybrid data centers and high-performance FPGA-version for use in hardware solutions in controlled facilities of SCADA-systems are given.

The Performance Improvement of the Lagrangian Particle Dispersion Model (LPDM) Using Graphics Processing Unit (GPU) Computing

Science.gov (United States)

2017-08-01

used for its GPU computing capability during the experiment. It has Nvidia Tesla K40 GPU accelerators containing 32 GPU nodes consisting of 1024...cores. CUDA is a parallel computing platform and application programming interface (API) model that was created and designed by Nvidia to give direct...Agricultural and Forest Meteorology. 1995:76:277–291, ISSN 0168-1923. 3. GPU vs. CPU? What is GPU computing? Santa Clara (CA): Nvidia Corporation; 2017

Preliminary Note on the Use of Radioisotopes to Study Some Cotton-Plant Pests in Africa; Note preliminaire sur l 'utilisation des radioisotopes dans l 'etude des parasites du cotonnier en afrique; Predvaritel'nye zamechaniya o primenenii radioizotopov dlya izucheniya nekotorykh vreditelej khlopchatnika v afrike.; Nota preliminar sobre el empleo de radioisotopos en el estudio de parasitos del algodonero en africa

Energy Technology Data Exchange (ETDEWEB)

Delattre, R. [Institut de Recherches du Coton et Textiles, Paris (France)

1963-09-15

el follaje de algodoneros jovenes. Hay orugas filofagas (Silepta derogata, Prodenia litura) que no retienen la radiactividad, pero las que se alimentan de organos fructiferos (Heliothis armigera, Earias insulana, Diparopsis watersi, etc.) se pueden detectar facilmente tres meses despues de la pulverizacion. En el segundo ensayo se aplicaron {sup 32}P y {sup 35}S a algodoneros viejos, inmediatamente antes de comenzar el periodo de diapausa natural de Diparopsis. Los resultados obtenidos hacen pensar que no sera muy dificil distinguir, entre las poblaciones de crisalidas recogidas del suelo, las que se han nutrido en el algodonero antes de ser marcado, es decir, las que habran sufrido una diapausa. (author) [Russian] Gusenitsa Diparopsis watersi (Roth) nanosit vred khlopchatniku, unichtozhaya tsvet i korobochku. Ehta,prakticheski,monofagovaya sovka provodit mezhsezonnyj period libo v zemle v vide kukolki v sostoyanii diapauzy, nachinaya s 10 noyabrya, libo v vide novykh (polivol'tinnykh) pokolenij na ne vykopannykh iz zemli rasteniyakh. Laboratornye issledovaniya pozvolili vyyasnit' osnovnye mekhanizmy vozniknoveniya i prekrashcheniya diapauzy. V prirode intensivnoe razmnozhenie pri razvedenii kul'tur proiskhodit u odnikh osobej s odnim pokoleniem v god, vyplansivayushchikhsya k aprelyu-mayu, u vtorykh - poyavlenie pokolenij bez diapauzy; otnositel'nuyu rol' ehtikh dvukh razlichnykh vetvej osobej sledovalo by tochno opredelit' dlya vybora metoda bor'by: vykorchevka khlopchatnika, unichtozhenie kukolok v sostoyanii diapauzy v zemle, sokrashchenie srokov sel'skokhozyajstvennoj kampanii i t.d. Mechenie radioizotopami gusenits, kotorye v kriticheskij period dostigayut zrelosti, dolzhno suzit' ehtu problemu v prakticheskom plane. V Tikeme (Respublike Chad) byli provedeny predvaritel'nye opyty dlya opredeleniya prostykh metodov mecheniya. V pervom opyte byl ispol'zovan P{sup 32} pri pryamom vodnom obryzgivanii listvy molodogo khlopchatnika. Nesmotrya na dozhd', pogloshchenie

Atmospheric lidar: legislative, scientific and technological aspects; Lidar atmosferico. Aspetti legislativi, scientifici e tecnologici

Energy Technology Data Exchange (ETDEWEB)

Barbini, R.; Colao, F.; Fiorani, L.; Palucci, A. [ENEA, Divisione Fisica Applicata, Centro Ricerche Frascati, Frascati, RM (Italy)

2000-07-01

The Atmospheric Lidar is one of the systems of the Mobile Laboratory of Laser Remote Sensing under development at the ENEA Research Center of Frascati. This technical report addresses the legislative, scientific and technological aspects that are the basis for the identification of the requirements, the definition of the architecture and the fixation of the specifications of the Atmospheric Lidar. The problems of air pollution are introduced in section 2. A summary of the Italian laws on that topic is then given. Section 4 provides a survey of the atmospheric measurements that can be achieved with the lidar. The sensitivity in the monitoring of pollutants is discussed in section 5. The other systems of the Mobile Laboratory of Laser Remote Sensing are shortly described in section 6. The last section is devoted to conclusions and perspectives. [Italian] Il lidar atmosferico e' uno dei sistemi del Laboratorio Mobile di Telerilevamento Laser in corso di realizzazione presso il Centro Ricerche di Frascati dell'ENEA. Questo rapporto tecnico discute gli aspetti legislativi, scientifici, tecnologici che sono alla base dell'individuazione dei requisiti, della definizione dell'architettura e della fissazione delle specifiche del Lidar atmosferico. La problematica dell'inquinamento dell'aria e' introdotta nella sezione 2. Segue un riassunto della legislazione italiana su tale tematica. La sezione 4 offre una panoramica delle misure atmosferiche realizzabili con il Lidar. La sensibilita' nel monitoraggio di inquinanti e' discussa nella sezione 5. Gli altri sistemi del Laboratorio Mobile di Telerilevamento Laser sono descritti brevemente nella sezione 6. L'ultima sezione e' dedicata alle conclusioni e alle prospettive.

Analysis and Implementation of Particle-to-Particle (P2P) Graphics Processor Unit (GPU) Kernel for Black-Box Adaptive Fast Multipole Method

Science.gov (United States)

2015-06-01

implementation of the direct interaction called particle-to-particle kernel for a shared-memory single GPU device using the Compute Unified Device Architecture ...GPU-defined P2P kernel we developed using the Compute Unified Device Architecture (CUDA).9 A brief outline of the rest of this work follows. The...Employed The computing environment used for this work is a 64-node heterogeneous cluster consisting of 48 IBM dx360M4 nodes, each with one Intel Phi

A Block-Asynchronous Relaxation Method for Graphics Processing Units

OpenAIRE

Anzt, H.; Dongarra, J.; Heuveline, Vincent; Tomov, S.

2011-01-01

In this paper, we analyze the potential of asynchronous relaxation methods on Graphics Processing Units (GPUs). For this purpose, we developed a set of asynchronous iteration algorithms in CUDA and compared them with a parallel implementation of synchronous relaxation methods on CPU-based systems. For a set of test matrices taken from the University of Florida Matrix Collection we monitor the convergence behavior, the average iteration time and the total time-to-solution time. Analyzing the r...

Brain Computer Interface for Micro-controller Driven Robot Based on Emotiv Sensors

OpenAIRE

Parth Gargava; Krishna Asawa

2017-01-01

A Brain Computer Interface (BCI) is developed to navigate a micro-controller based robot using Emotiv sensors. The BCI system has a pipeline of 5 stages- signal acquisition, pre-processing, feature extraction, classification and CUDA inter- facing. It shall aid in serving a prototype for physical movement of neurological patients who are unable to control or operate on their muscular movements. All stages of the pipeline are designed to process bodily actions like eye blinks to command naviga...

GPU-Accelerated Real-Time Surveillance De-Weathering

OpenAIRE

Pettersson, Niklas

2013-01-01

A fully automatic de-weathering system to increase the visibility/stability in surveillance applications during bad weather has been developed. Rain, snow and haze during daylight are handled in real-time performance with acceleration from CUDA implemented algorithms. Video from fixed cameras is processed on a PC with no need of special hardware except an NVidia GPU. The system does not use any background model and does not require any precalibration. Increase in contrast is obtained in all h...

The Metropolis Monte Carlo method with CUDA enabled Graphic Processing Units

Energy Technology Data Exchange (ETDEWEB)

Hall, Clifford [Computational Materials Science Center, George Mason University, 4400 University Dr., Fairfax, VA 22030 (United States); School of Physics, Astronomy, and Computational Sciences, George Mason University, 4400 University Dr., Fairfax, VA 22030 (United States); Ji, Weixiao [Computational Materials Science Center, George Mason University, 4400 University Dr., Fairfax, VA 22030 (United States); Blaisten-Barojas, Estela, E-mail: blaisten@gmu.edu [Computational Materials Science Center, George Mason University, 4400 University Dr., Fairfax, VA 22030 (United States); School of Physics, Astronomy, and Computational Sciences, George Mason University, 4400 University Dr., Fairfax, VA 22030 (United States)

2014-02-01

We present a CPU–GPU system for runtime acceleration of large molecular simulations using GPU computation and memory swaps. The memory architecture of the GPU can be used both as container for simulation data stored on the graphics card and as floating-point code target, providing an effective means for the manipulation of atomistic or molecular data on the GPU. To fully take advantage of this mechanism, efficient GPU realizations of algorithms used to perform atomistic and molecular simulations are essential. Our system implements a versatile molecular engine, including inter-molecule interactions and orientational variables for performing the Metropolis Monte Carlo (MMC) algorithm, which is one type of Markov chain Monte Carlo. By combining memory objects with floating-point code fragments we have implemented an MMC parallel engine that entirely avoids the communication time of molecular data at runtime. Our runtime acceleration system is a forerunner of a new class of CPU–GPU algorithms exploiting memory concepts combined with threading for avoiding bus bandwidth and communication. The testbed molecular system used here is a condensed phase system of oligopyrrole chains. A benchmark shows a size scaling speedup of 60 for systems with 210,000 pyrrole monomers. Our implementation can easily be combined with MPI to connect in parallel several CPU–GPU duets. -- Highlights: •We parallelize the Metropolis Monte Carlo (MMC) algorithm on one CPU—GPU duet. •The Adaptive Tempering Monte Carlo employs MMC and profits from this CPU—GPU implementation. •Our benchmark shows a size scaling-up speedup of 62 for systems with 225,000 particles. •The testbed involves a polymeric system of oligopyrroles in the condensed phase. •The CPU—GPU parallelization includes dipole—dipole and Mie—Jones classic potentials.

Fast Implementation of Two Hash Algorithms on nVidia CUDA GPU

OpenAIRE

Lerchundi Osa, Gorka

2009-01-01

Projecte fet en col.laboració amb Norwegian University of Science and Technology. Department of Telematics User needs increases as time passes. We started with computers like the size of a room where the perforated plaques did the same function as the current machine code object does and at present we are at a point where the number of processors within our graphic device unit it’s not enough for our requirements. A change in the evolution of computing is looming. We are in a t...

The Metropolis Monte Carlo method with CUDA enabled Graphic Processing Units

International Nuclear Information System (INIS)

Hall, Clifford; Ji, Weixiao; Blaisten-Barojas, Estela

2014-01-01

We present a CPU–GPU system for runtime acceleration of large molecular simulations using GPU computation and memory swaps. The memory architecture of the GPU can be used both as container for simulation data stored on the graphics card and as floating-point code target, providing an effective means for the manipulation of atomistic or molecular data on the GPU. To fully take advantage of this mechanism, efficient GPU realizations of algorithms used to perform atomistic and molecular simulations are essential. Our system implements a versatile molecular engine, including inter-molecule interactions and orientational variables for performing the Metropolis Monte Carlo (MMC) algorithm, which is one type of Markov chain Monte Carlo. By combining memory objects with floating-point code fragments we have implemented an MMC parallel engine that entirely avoids the communication time of molecular data at runtime. Our runtime acceleration system is a forerunner of a new class of CPU–GPU algorithms exploiting memory concepts combined with threading for avoiding bus bandwidth and communication. The testbed molecular system used here is a condensed phase system of oligopyrrole chains. A benchmark shows a size scaling speedup of 60 for systems with 210,000 pyrrole monomers. Our implementation can easily be combined with MPI to connect in parallel several CPU–GPU duets. -- Highlights: •We parallelize the Metropolis Monte Carlo (MMC) algorithm on one CPU—GPU duet. •The Adaptive Tempering Monte Carlo employs MMC and profits from this CPU—GPU implementation. •Our benchmark shows a size scaling-up speedup of 62 for systems with 225,000 particles. •The testbed involves a polymeric system of oligopyrroles in the condensed phase. •The CPU—GPU parallelization includes dipole—dipole and Mie—Jones classic potentials.

Projector and Backprojector for Iterative CT Reconstruction with Blobs using CUDA

NARCIS (Netherlands)

Bippus, R.D.; Koehler, T.; Bergner, F.; Brendel, B.; Hansis, E.; Proksa, R.

2011-01-01

Aiming at modeling the system’s geometry correctly accounting for the major effects influencing image quality within an iterative reconstruction framework we want to achieve this within reasonable processing times. This principle objective led us to using blobs for imagerepresentation and a

Bones : an automatic skeleton-based C-to-CUDA compiler for GPUs

NARCIS (Netherlands)

Nugteren, C.; Corporaal, H.

2014-01-01

The shift toward parallel processor architectures has made programming and code generation increasingly challenging. To address this programmability challenge, this article presents a technique to fully automatically generate efficient and readable code for parallel processors (with a focus on

Highway tunnel safety; Le gallerie infrastrutturali e la loro sicurezza

Energy Technology Data Exchange (ETDEWEB)

Sacripanti, A [ENEA, Divisione Robotica Informatica Avanzata, Rome (Italy)

2001-04-01

Guaranteeing an acceptable level of fire safety in tunnels requires the targeted and integrated use of innovative technologies and systems. However, their deployment to improve safety against a variable risk like fire must be based on a risk analysis capable of developing a dynamic vision of the tunnel. [Italian] Per assicurare un livello di sicurezza accettabile nei tunnel, in caso di incendio e' necessario l'uso mirato ed integrato di tecnologie e sistemi innovativi. Alla base, pero', ci deve essere una analisi di rischio in grado di sviluppare una visione dinamica della galleria, per migliorarne la sicurezza a fronte di un rischio variabile nel tempo.

Beleženje delovnega časa z uporabo tehnologije RFID

OpenAIRE

MAŠIĆ, TADEJ

2018-01-01

Za beleženje delovnega časa zaposlenih se v podjetjih in ustanovah uporabljajo različne metode. Kljub razpoložljivim sodobnih tehnologijam še vedno ponekod najdemo beleženje delovnega časa z vpisovanjem prihodov in odhodov na list papirja ali v računalniške tabele. Takšni načini niso avtomatizirani in prinašajo več slabosti kot prednosti. Na trgu obstajajo računalniško avtomatizirani sistemi za beleženje časa, a ker so ti lahko zelo dragi, se zanje manjša podjetja in ustanove odločajo le redk...

HPLC ve Kağıt Kromatografisi Tekniklerinin Kombinasyonu ile Flavonoidlerin Saflaştırılması

OpenAIRE

Velioğlu, Sedat; Cemeroğlu, Bekir

1992-01-01

Bu araştırmada, kağıt kromatografisi ve yüksek basınç likit kromatografisi (HPLC) yöntemlerinin birlikte uygulanması ile flavonoidlerin saf olarak elde edilme olanakları incelenmiştir. Whatman 3MM kromatografi kağıdı ve BAW solvent sistemi kullanılarak inen tipte kağıt kromatografisi tekniğiyle 7 band elde edilmiş ve bu bantlar üzerindeki flavonoidler MAW solvent sistemiyle elue edildikten sonra HPLC kolonuna enjekte edilmiştir. Araştırma bulguları, bu yolla 15 adet pikin saf olarak elde edil...

Highway tunnel safety; Le gallerie infrastrutturali e la loro sicurezza

Energy Technology Data Exchange (ETDEWEB)

Sacripanti, A. [ENEA, Divisione Robotica Informatica Avanzata, Rome (Italy)

2001-04-01

Guaranteeing an acceptable level of fire safety in tunnels requires the targeted and integrated use of innovative technologies and systems. However, their deployment to improve safety against a variable risk like fire must be based on a risk analysis capable of developing a dynamic vision of the tunnel. [Italian] Per assicurare un livello di sicurezza accettabile nei tunnel, in caso di incendio e' necessario l'uso mirato ed integrato di tecnologie e sistemi innovativi. Alla base, pero', ci deve essere una analisi di rischio in grado di sviluppare una visione dinamica della galleria, per migliorarne la sicurezza a fronte di un rischio variabile nel tempo.

GENEL İMALAT MALİYETLERİNİN DAĞITIMINDA FAALİYET ESASINA DAYALI MALİYETLEME SİSTEMİ VE ÇEVRESEL MALİYETLERİN DEĞERLENDİRİLMESİ

OpenAIRE

Otlu, Fikret; Çukacı, Yusuf Cahit

2010-01-01

Özet: Bu çalışmada faaliyet esaslı maliyetleme sistemi ile gelenekselsistemlerin karşılaştırılması yapılmış olup, işletmelerin son yıllardakarşılaştıkları çevresel maliyetler hakkında bilgi verilerek, çevresel maliyetlerinbir genel imalat maliyeti olarak geleneksel ve faaliyet esasına dayalımaliyetleme sistemine göre dağıtımı bir örnek yardımıyla gösterilmiştir.Anahtar Kelimeler: Genel İmalat Maliyetleri, Geleneksel MaliyetlemeSistemleri, Faaliyet Esas...

Local government and best practices in land resource management; Compendio delle azioni dell'Amministrazione Locale verso una definizione di best practices sul territorio

Energy Technology Data Exchange (ETDEWEB)

Basili, M; Bertini, I; Citterio, M [ENEA, Rome (Italy)

1998-07-01

The aim of this paper is to present the efforts of public administration in the correct environmental management of territorial systems. A data base and census on best practices over territory is desirable. [Italian] Lo scopo di questo documento riguarda la ricognizione il piu' possibile completa e affidabile degli sforzi che la Pubblica Amministrazione degli Enti Locali intraprende per una gestione ambientalmente corretta dei propri sistemi territoriali e attirare l'attenzione su quelle azioni che forniscono le migliori soluzioni al problema e che possono essere d'esempio per altre amministrazioni. Si rende indispensabile la formazione di una banca dati con le informazioni e i documenti di riferimento.

Near real-time digital holographic microscope based on GPU parallel computing

Science.gov (United States)

Zhu, Gang; Zhao, Zhixiong; Wang, Huarui; Yang, Yan

2018-01-01

A transmission near real-time digital holographic microscope with in-line and off-axis light path is presented, in which the parallel computing technology based on compute unified device architecture (CUDA) and digital holographic microscopy are combined. Compared to other holographic microscopes, which have to implement reconstruction in multiple focal planes and are time-consuming the reconstruction speed of the near real-time digital holographic microscope can be greatly improved with the parallel computing technology based on CUDA, so it is especially suitable for measurements of particle field in micrometer and nanometer scale. Simulations and experiments show that the proposed transmission digital holographic microscope can accurately measure and display the velocity of particle field in micrometer scale, and the average velocity error is lower than 10%.With the graphic processing units(GPU), the computing time of the 100 reconstruction planes(512×512 grids) is lower than 120ms, while it is 4.9s using traditional reconstruction method by CPU. The reconstruction speed has been raised by 40 times. In other words, it can handle holograms at 8.3 frames per second and the near real-time measurement and display of particle velocity field are realized. The real-time three-dimensional reconstruction of particle velocity field is expected to achieve by further optimization of software and hardware. Keywords: digital holographic microscope,

AMITIS: A 3D GPU-Based Hybrid-PIC Model for Space and Plasma Physics

Science.gov (United States)

Fatemi, Shahab; Poppe, Andrew R.; Delory, Gregory T.; Farrell, William M.

2017-05-01

We have developed, for the first time, an advanced modeling infrastructure in space simulations (AMITIS) with an embedded three-dimensional self-consistent grid-based hybrid model of plasma (kinetic ions and fluid electrons) that runs entirely on graphics processing units (GPUs). The model uses NVIDIA GPUs and their associated parallel computing platform, CUDA, developed for general purpose processing on GPUs. The model uses a single CPU-GPU pair, where the CPU transfers data between the system and GPU memory, executes CUDA kernels, and writes simulation outputs on the disk. All computations, including moving particles, calculating macroscopic properties of particles on a grid, and solving hybrid model equations are processed on a single GPU. We explain various computing kernels within AMITIS and compare their performance with an already existing well-tested hybrid model of plasma that runs in parallel using multi-CPU platforms. We show that AMITIS runs ∼10 times faster than the parallel CPU-based hybrid model. We also introduce an implicit solver for computation of Faraday’s Equation, resulting in an explicit-implicit scheme for the hybrid model equation. We show that the proposed scheme is stable and accurate. We examine the AMITIS energy conservation and show that the energy is conserved with an error < 0.2% after 500,000 timesteps, even when a very low number of particles per cell is used.

Parallel computing in cluster of GPU applied to a problem of nuclear engineering

International Nuclear Information System (INIS)

Moraes, Sergio Ricardo S.; Heimlich, Adino; Resende, Pedro

2013-01-01

Cluster computing has been widely used as a low cost alternative for parallel processing in scientific applications. With the use of Message-Passing Interface (MPI) protocol development became even more accessible and widespread in the scientific community. A more recent trend is the use of Graphic Processing Unit (GPU), which is a powerful co-processor able to perform hundreds of instructions in parallel, reaching a capacity of hundreds of times the processing of a CPU. However, a standard PC does not allow, in general, more than two GPUs. Hence, it is proposed in this work development and evaluation of a hybrid low cost parallel approach to the solution to a nuclear engineering typical problem. The idea is to use clusters parallelism technology (MPI) together with GPU programming techniques (CUDA - Compute Unified Device Architecture) to simulate neutron transport through a slab using Monte Carlo method. By using a cluster comprised by four quad-core computers with 2 GPU each, it has been developed programs using MPI and CUDA technologies. Experiments, applying different configurations, from 1 to 8 GPUs has been performed and results were compared with the sequential (non-parallel) version. A speed up of about 2.000 times has been observed when comparing the 8-GPU with the sequential version. Results here presented are discussed and analyzed with the objective of outlining gains and possible limitations of the proposed approach. (author)

Fast parallel tandem mass spectral library searching using GPU hardware acceleration.

Science.gov (United States)

Baumgardner, Lydia Ashleigh; Shanmugam, Avinash Kumar; Lam, Henry; Eng, Jimmy K; Martin, Daniel B

2011-06-03

Mass spectrometry-based proteomics is a maturing discipline of biologic research that is experiencing substantial growth. Instrumentation has steadily improved over time with the advent of faster and more sensitive instruments collecting ever larger data files. Consequently, the computational process of matching a peptide fragmentation pattern to its sequence, traditionally accomplished by sequence database searching and more recently also by spectral library searching, has become a bottleneck in many mass spectrometry experiments. In both of these methods, the main rate-limiting step is the comparison of an acquired spectrum with all potential matches from a spectral library or sequence database. This is a highly parallelizable process because the core computational element can be represented as a simple but arithmetically intense multiplication of two vectors. In this paper, we present a proof of concept project taking advantage of the massively parallel computing available on graphics processing units (GPUs) to distribute and accelerate the process of spectral assignment using spectral library searching. This program, which we have named FastPaSS (for Fast Parallelized Spectral Searching), is implemented in CUDA (Compute Unified Device Architecture) from NVIDIA, which allows direct access to the processors in an NVIDIA GPU. Our efforts demonstrate the feasibility of GPU computing for spectral assignment, through implementation of the validated spectral searching algorithm SpectraST in the CUDA environment.

A Comparison of Sequential and GPU Implementations of Iterative Methods to Compute Reachability Probabilities

Directory of Open Access Journals (Sweden)

Elise Cormie-Bowins

2012-10-01

Full Text Available We consider the problem of computing reachability probabilities: given a Markov chain, an initial state of the Markov chain, and a set of goal states of the Markov chain, what is the probability of reaching any of the goal states from the initial state? This problem can be reduced to solving a linear equation Ax = b for x, where A is a matrix and b is a vector. We consider two iterative methods to solve the linear equation: the Jacobi method and the biconjugate gradient stabilized (BiCGStab method. For both methods, a sequential and a parallel version have been implemented. The parallel versions have been implemented on the compute unified device architecture (CUDA so that they can be run on a NVIDIA graphics processing unit (GPU. From our experiments we conclude that as the size of the matrix increases, the CUDA implementations outperform the sequential implementations. Furthermore, the BiCGStab method performs better than the Jacobi method for dense matrices, whereas the Jacobi method does better for sparse ones. Since the reachability probabilities problem plays a key role in probabilistic model checking, we also compared the implementations for matrices obtained from a probabilistic model checker. Our experiments support the conjecture by Bosnacki et al. that the Jacobi method is superior to Krylov subspace methods, a class to which the BiCGStab method belongs, for probabilistic model checking.

Real-time capture and reconstruction system with multiple GPUs for a 3D live scene by a generation from 4K IP images to 8K holograms.

Science.gov (United States)

Ichihashi, Yasuyuki; Oi, Ryutaro; Senoh, Takanori; Yamamoto, Kenji; Kurita, Taiichiro

2012-09-10

We developed a real-time capture and reconstruction system for three-dimensional (3D) live scenes. In previous research, we used integral photography (IP) to capture 3D images and then generated holograms from the IP images to implement a real-time reconstruction system. In this paper, we use a 4K (3,840 × 2,160) camera to capture IP images and 8K (7,680 × 4,320) liquid crystal display (LCD) panels for the reconstruction of holograms. We investigate two methods for enlarging the 4K images that were captured by integral photography to 8K images. One of the methods increases the number of pixels of each elemental image. The other increases the number of elemental images. In addition, we developed a personal computer (PC) cluster system with graphics processing units (GPUs) for the enlargement of IP images and the generation of holograms from the IP images using fast Fourier transform (FFT). We used the Compute Unified Device Architecture (CUDA) as the development environment for the GPUs. The Fast Fourier transform is performed using the CUFFT (CUDA FFT) library. As a result, we developed an integrated system for performing all processing from the capture to the reconstruction of 3D images by using these components and successfully used this system to reconstruct a 3D live scene at 12 frames per second.

Bayer image parallel decoding based on GPU

Science.gov (United States)

Hu, Rihui; Xu, Zhiyong; Wei, Yuxing; Sun, Shaohua

2012-11-01

In the photoelectrical tracking system, Bayer image is decompressed in traditional method, which is CPU-based. However, it is too slow when the images become large, for example, 2K×2K×16bit. In order to accelerate the Bayer image decoding, this paper introduces a parallel speedup method for NVIDA's Graphics Processor Unit (GPU) which supports CUDA architecture. The decoding procedure can be divided into three parts: the first is serial part, the second is task-parallelism part, and the last is data-parallelism part including inverse quantization, inverse discrete wavelet transform (IDWT) as well as image post-processing part. For reducing the execution time, the task-parallelism part is optimized by OpenMP techniques. The data-parallelism part could advance its efficiency through executing on the GPU as CUDA parallel program. The optimization techniques include instruction optimization, shared memory access optimization, the access memory coalesced optimization and texture memory optimization. In particular, it can significantly speed up the IDWT by rewriting the 2D (Tow-dimensional) serial IDWT into 1D parallel IDWT. Through experimenting with 1K×1K×16bit Bayer image, data-parallelism part is 10 more times faster than CPU-based implementation. Finally, a CPU+GPU heterogeneous decompression system was designed. The experimental result shows that it could achieve 3 to 5 times speed increase compared to the CPU serial method.

Ultra-high-speed oscillographic techniques; Techniques d'oscillographie ultra-rapide; Metody sverkhskorostnoj ostsillografii; Metodos oscilograficos ultrarrapidos

Energy Technology Data Exchange (ETDEWEB)

Abercrombie, S; Elphick, B; Foster, H [Atomic Weapons Research Establishment, Aldermaston (United Kingdom)

1962-04-15

i, v chastnosti, lamp s otrazheniem begushchej volny. Opisyvayutsya sleduyushchie sostavnye chasti polnogo ostsillografa dlya izucheniya perekhodyashchikh signalov: a) Katodnaya ehlektronnaya lampa s otrazhatelem begushchej volny i s uravnoveshennoj koaksial'noj svyaz'yu pri shirine polosy chastot v 2 kmgts. b) Fazorasshchepitel'nyj preobrazovatel' s kharakternym polnym soprotivleniem v 100 i 50 omov i shirinoj polosy chastot ot 1,5 kgts do 1,5 kmgts. v) Koaksial'nye konechnye soprotivleniya, rabotayushchie na kmgts. g) Emkosti svyazi, kompensirovannye dlya vklyucheniya v koaksial'nye linii s diapazonom chastot ot 5 kgts do 3 kmgts, s kharakternymi polnymi soprotivleniyami v 100 omov. d) SHirokopolosnye pogloshchayushchie oslabiteli dlya otbora puskovykh signalov nachala otscheta vremeni. e) Nanosekundnye osnovy vremeni s ustrojstvom dlya puska v khod i preryvaniya impul'sov. zh) Opisyvaetsya kamera s shirokoj aperturoj. V zaklyuchenie opisyvaetsya primenenie ehtikh metodov v yadernoj ehlektronike. (author)

Surveys for Biological Control Agents of Hydrilla verticillata in the People’s Republic of China in 2013

Science.gov (United States)

2017-03-01

Cullen , D. T. Briese, D. J. Kriticos, W. M. Lonsdale, L. Morin, and J. K. Scott, 529-538. Canberra, Australia: CSIRO. ERDC/EL TR-17-3 15 Grodowitz M...J. Aquat. Plant Manage. 46:42-50 Manrique, V., J. P. Cuda, W. A. Overholt, D. Williams , G. Wheeler, G. 2008. Effect of host-plant genotypes on the...Review of the Literature. www.northeastans.org/docs/hydrillalitsearch12.31.12.pdf. Accessed14 April 2014. Overholt, W. A., R. Copeland, D. Williams

GPU Computing Gems Emerald Edition

CERN Document Server

Hwu, Wen-mei W

2011-01-01

".the perfect companion to Programming Massively Parallel Processors by Hwu & Kirk." -Nicolas Pinto, Research Scientist at Harvard & MIT, NVIDIA Fellow 2009-2010 Graphics processing units (GPUs) can do much more than render graphics. Scientists and researchers increasingly look to GPUs to improve the efficiency and performance of computationally-intensive experiments across a range of disciplines. GPU Computing Gems: Emerald Edition brings their techniques to you, showcasing GPU-based solutions including: Black hole simulations with CUDA GPU-accelerated computation and interactive display of

Implementation of RLS-based Adaptive Filterson nVIDIA GeForce Graphics Processing Unit

OpenAIRE

Hirano, Akihiro; Nakayama, Kenji

2011-01-01

This paper presents efficient implementa- tion of RLS-based adaptive filters with a large number of taps on nVIDIA GeForce graphics processing unit (GPU) and CUDA software development environment. Modification of the order and the combination of calcu- lations reduces the number of accesses to slow off-chip memory. Assigning tasks into multiple threads also takes memory access order into account. For a 4096-tap case, a GPU program is almost three times faster than a CPU program.

Use of a GPGPU means for the development of search programs of defects of monochrome half-tone pictures

International Nuclear Information System (INIS)

Dudnik, V.A.; Kudryavtsev, V.I.; Sereda, T.M.; Us, S.A.; Shestakov, M.V.

2013-01-01

Application of a GPGPU means for the development of search programs of defects of monochrome half-tone pictures is described. The description of realization of algorithm of search of images' defects by the means of technology CUDA (Compute Unified Device Architecture - the unified hardware-software decision for parallel calculations on GPU) companies NVIDIA is resulted. It is done the comparison of the temporary characteristics of performance of images' updating without application GPU and with use of opportunities of graphic processor GeForce 8800.

Docker Containers for Deep Learning Experiments

OpenAIRE

Gerke, Paul K.

2017-01-01

Deep learning is a powerful tool to solve problems in the area of image analysis. The dominant compute platform for deep learning is Nvidia’s proprietary CUDA, which can only be used together with Nvidia graphics cards. The nivida-docker project allows exposing Nvidia graphics cards to docker containers and thus makes it possible to run deep learning experiments in docker containers.In our department, we use deep learning to solve problems in the area of medical image analysis and use docker ...

Extensions of the techniques for the accelerated unspecific isotopic labelling of organic compounds; Applications nouvelles des techniques accelererees du marquage non specifique de composes organiques; Rasprostranenie metodov uskoreniya mecheniya nespetsifichnymi izotopami organicheskikh slozhnykh soedinenij; Nuevas aplicaciones de las tecnicas de marcacion inespecifica acelerada de compuestos organicos

Energy Technology Data Exchange (ETDEWEB)

Ghanem, N A [National Research Centre, El-Dokki, Cairo (Egypt); Westermark, T [Division of Physical Chemistry, Royal Institute of Technology, Stockholm 70 (Sweden)

1962-03-15

marcar, y citar ejemplos en los que este procedimiento se ha empleado con exito. Las diversas tecnicas se basan en el uso de descargas de microondas y de ondas hertzianas, descargas luminiscentes producidas por corriente continua, o alterna, o sencillamente rayos ultravioleta. Se han obtenido cantidades considerables de productos purificados con actividades superiores a 100 mcuries/g. Los tiempos de exposicion a las descargas son del orden de un minuto, y en la mayoria de los casos se observo poca descomposicion. Los autores calcularon el rendimiento energetico alcanzado en estos metodos de marcacion y lo comparan con el correspondiente a las radiaciones ionizantes empleadas por Wilzbach y otros investigadores; tambien dan los valores de G para la sustitucion isotopica. Existen pruebas de que la marcacion del poliestireno se produce en virtud de una reaccion atomo-molecula. (author) [Russian] Tsel'yu nastoyashchego doklada yavlyaetsya rassmotrenie novykh sposobov uskoreniya reaktsii mezhdu radioaktivnym gazom i materialom misheni, podlezhashchim mecheniyu, a takzhe privedenie primerov uspeshnykh sluchaev. Ehti metody vklyuchayut ispol'zovanie razryadov mikrovoln i radiovoln, tleyushchikh razryadov pod vozdejstviem istochnikov postoyannogo ili peremennogo tokov, ili prosto radiatsii ul'trafioletovykh luchej. Byla dostignuta udel'naya aktivnost', dokhodyashchaya do 100 mikrokyuri na gramm, v znachitel'nykh kolichestvakh ochishchennogo produkta. Vremya vozdejstviya razryada bylo poryadka odnoj minuty, i vo mnogikh sluchayakh razlozhenie bylo chrezvychajno ogranichennym. Dayutsya podschety ehffektivnosti ispol'zovaniya ehnergii dlya proizvodstva mecheniya ehtimi metodami po sravneniyu s zatratoj dlya toj zhe tseli ehnergii ioniziruyushchego izlucheniya, ispol'zuemoj Vil'tsbakhom i dr. ; krome togo, ukazyvayutsya znacheniya radiatsionnokhimicheskogo vykhoda G dlya zameny izotopov. Est' ukazaniya na to, chto pri mechenii polistirola mekhanizm opredelyaetsya reaktsiej atom

Low-intensive proton generators for radiation testing; Nizkointensivnyj protonnyj generator dlya radiatsionnykh ispytanij

Energy Technology Data Exchange (ETDEWEB)

Istomin, I V; Gurbich, A F; Semenov, A V

1994-12-31

Experiment is conducted and calculations are performed grounding the possibility of creating a low-intensity proton generator based on nuclear reaction. The necessity in such a proton source is defined by the need of conducting long-term testings and by the absence of appropriate equipment.

Device for high-temperature X-ray diffraction analysis. Ustrojstvo dlya vysokotemperaturnogo rentgenostrukturnogo analiza

Energy Technology Data Exchange (ETDEWEB)

Epifanov, V G; Zavilinskij, A V; Pet' kov, V V; Polenur, A V

1975-01-07

Device for high-temperature X-ray diffraction analysis, containing a vacuum chamber with a window for X-ray transit, in which sample- and standard-holders, heater, thermal shields and means for standard and sample temperature measurement are located, is proposed. In order to increase the working temperature level and the structural change detection accuracy the heater is located between the sample- and standard-holders. The standard-holder is linked with the mechanism of control of its position in relation to the heater. The device is intended for investigating phase transformations by differential thermal analysis method with the simultaneous diffraction pattern detection using X-ray diffractometry method.

Caratteristiche dei sistemi differenziali e propagazione ondosa lezioni raccolte dal Dott. G. Lampariello

CERN Document Server

Levi-Civita, Tullio

1988-01-01

L'edizione originale di questo libro (qui riprodatta anastaticamente) fu pubblicata nel 1931 per i tipi di Zanichelli nella serie delle Attualità scientifiche (n.41). Del suo contenuto valga come descrizione e giudizio di sintesi quanto ne scrisse a suo tempo H. Bateman nel Bulletin of the American Mathematical Society: " Theses lectures give a clear account of the branch of partial differential equations in which attention is focused on the problem of Cauchy and its exceptional cases. The theory is well illustrated by examples from hydrodynamics, optics, and the recent theory of the Broglie waves".

Process mining : come estrarre conoscenza dai log dei sistemi informativi orientati ai processi

NARCIS (Netherlands)

Aalst, van der W.M.P.; Burattin, A.; Leoni, de M.; Guzzo, A.; Maggi, F.M.; Montali, M.

2012-01-01

Le tecniche di Process Mining consentono di modellare, monitorare e migliorare i processi in un'ampia varietà di domini applicativi. Queste tecniche sono oggetto di crescente interesse per la necessità di adeguare i processi di business a contesti sempre più competitivi e in rapida evoluzione.

Parallel hyperbolic PDE simulation on clusters: Cell versus GPU

Science.gov (United States)

Rostrup, Scott; De Sterck, Hans

2010-12-01

Increasingly, high-performance computing is looking towards data-parallel computational devices to enhance computational performance. Two technologies that have received significant attention are IBM's Cell Processor and NVIDIA's CUDA programming model for graphics processing unit (GPU) computing. In this paper we investigate the acceleration of parallel hyperbolic partial differential equation simulation on structured grids with explicit time integration on clusters with Cell and GPU backends. The message passing interface (MPI) is used for communication between nodes at the coarsest level of parallelism. Optimizations of the simulation code at the several finer levels of parallelism that the data-parallel devices provide are described in terms of data layout, data flow and data-parallel instructions. Optimized Cell and GPU performance are compared with reference code performance on a single x86 central processing unit (CPU) core in single and double precision. We further compare the CPU, Cell and GPU platforms on a chip-to-chip basis, and compare performance on single cluster nodes with two CPUs, two Cell processors or two GPUs in a shared memory configuration (without MPI). We finally compare performance on clusters with 32 CPUs, 32 Cell processors, and 32 GPUs using MPI. Our GPU cluster results use NVIDIA Tesla GPUs with GT200 architecture, but some preliminary results on recently introduced NVIDIA GPUs with the next-generation Fermi architecture are also included. This paper provides computational scientists and engineers who are considering porting their codes to accelerator environments with insight into how structured grid based explicit algorithms can be optimized for clusters with Cell and GPU accelerators. It also provides insight into the speed-up that may be gained on current and future accelerator architectures for this class of applications. Program summaryProgram title: SWsolver Catalogue identifier: AEGY_v1_0 Program summary URL

Basic principles of scintillation counting; Principes de Base du Comptage par Scintillations; Osnovnye printsipy stsintillyatsij; Principios fundamentales del recuento con aparatos de centelleo

Energy Technology Data Exchange (ETDEWEB)

Johns, H E; Cederlund, J F [Ontario Cancer Institute, Toronto (Canada)

1959-07-01

raspredelenie impul'sov, proizvodimykh monoehnergeticheskoj radiatsiej. EHti voprosy budut zvzzany s primeneniem v issledovaniyakh metoda stsintillyatsij. Dalee budet rassmatrivat's ya vliyanie na rabotu fotoumnozhitelej i tak nazyvaemye . Kromo togo, budet obsuzhdat'sya primenenie lyuminestsentnykh peredatochnykh trubok dlya schetnykh operatsij i predstavleno poleznoe ustrojstvo vychitaniya dlya sravneniya skorosti raboty dvukh otdel'nykh stsintillyatsionnykh schetchikov. (author)

Monitoraggio remoto delle deformazioni nell’isola di Santorini: una procedura integrata di analisi dati GPS presso la Sezione INGV di Bologna

Directory of Open Access Journals (Sweden)

Arianna Pesci

2012-06-01

Full Text Available Il GPS (Global Positioning System è un noto sistema di posizionamento globale in grado di fornire le coordinate spaziali di unoperatore, se munito di antenna e ricevitore satellitari, in qualunque punto della terra esso si trovi, in qualunque condizionemeteo ed in qualsiasi ora del giorno. Oggi al GPS, che è di proprietà del Dipartimento della Difesa degli Stati Uniti d'America(US DoD, si affiancano il GLONASS (sistema analogo russo e altri sistemi di posizionamento globale basati su tecniche interferometriche spaziali a partire da segnali a microonde, ad esempio i nascenti Galileo (europeo e BeiDou (cinese. Per questo motivo si parla diffusamente di sistemi GNSS cioè Global Navigation Satellite System.   Remote monitoring of deformations in the island of Santorini: an integrated procedure for GPS data analysis at the INGV in Bologna The GPS (Global Positioning System is a well-known global positioning  system  capable  of  providing  the  spatial  coordi-nates of an operator, if equipped with an antenna and a re-ceiver satellite, at any point on the earth , and in any weather conditions and at any time of the day. Today, the GPS, which is owned by the Department of Defense of the United States of America (U.S. DoD, is aided by the GLONASS (the Russian analogue system and other global positioning systems based on interferometry from space microwave signals, for example, the  nascent  Galileo  (European  and  Beidou  (China.  For  this reason we talk at today about GNSS Global Navigation Satel-lite System.