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1

Porting of finite element integration algorithm to Xeon Phi coprocessor-based HPC architectures

Krużel Filip, Banaś Krzysztof, Iacomo Mauro

Computer Assisted Methods in Engineering and Science

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2023

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Vol. 30, no. 4

427--459

EN

In the present article, we describe the implementation of the finite element numerical integration algorithm for the Xeon Phi coprocessor. The coprocessor was an extension of the many-core specialized unit for calculations, and its performance was comparable with the corresponding GPUs. Its main advantages were the built-in 512-bit vector registers and the ease of transferring existing codes from traditional x86 architectures. In the article, we move the code developed for a standard CPU to the coprocessor. We compareits performance with our OpenCL implementation of the numerical integration algorithm, previously developed for GPUs. The GPU code is tuned to fit into a coprocessor by ourauto-tuning mechanism. Tests included two types of tasks to solve, using two types of approximation and two types of elements. The obtained timing results allow comparing the performance of highly optimized CPU and GPU codes with a Xeon Phi coprocessor performance. This article answers whether such massively parallel architectures perform better using the CPU or GPU programming method. Furthermore, we have compared the Xeon Phi architecture and the latest available Intel’s i9 13900K CPU when writing this article. This comparison determines if the old Xeon Phi architecture remains competitive in today’s computing landscape. Our findings provide valuable insights for selectingthe most suitable hardware for numerical computations and the appropriate algorithmic design.

2

Approach for management of brand positioning: quantification of value matching between brand and target audience

Gerasimenko Valentina, Andreyuk Denis, Kurkova Dina

Polish Journal of Management Studies

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2021

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Vol. 24, No. 1

96--111

EN

The paper aims to propose innovative ideas on developing brand management techniques. The authors apply a novel quantitative approach involving semantic analysis of external brand communications to determine whether the brand value system is aligned with customers’ core values. Based on the survey on the main life values of the selected audience, a standard scale was compiled, in which the structure of values is represented as a vector of 26 variables. On the other hand, the semantic core of each of the studied brands was analyzed and presented as a vector of comparisons with this scale. This allowed calculating the cosine proximity of the vectors of the value structure of brands to each other. To prove the concept, the research compares value structures of six luxury brands ranked among the most expensive in 2020. The suggested technique can be used as a tool for market analysis, in particular, strategic brand positioning management and setting up communication strategies of companies.

PL

Celem artykułu jest przedstawienie innowacyjnych pomysłów na rozwój technik zarządzania marką. Autorzy stosują nowatorskie podejście ilościowe polegające na analizie semantycznej zewnętrznej komunikacji marki w celu ustalenia, czy system wartości marki jest zgodny z podstawowymi wartościami klientów. Na podstawie badania głównych wartości życiowych wybranej grupy odbiorców opracowano standardową skalę, w której strukturę wartości przedstawiono jako wektor 26 zmiennych. Z kolei rdzeń semantyczny każdej z badanych marek został przeanalizowany i przedstawiony jako wektor porównań z tą skalą. Pozwoliło to na obliczenie cosinusowej bliskości wektorów struktury wartości marek względem siebie. Na potwierdzenie tej koncepcji w badaniu porównano struktury wartości sześciu luksusowych marek, które znalazły się wśród najdroższych w 2020 roku. Zaproponowana technika może być wykorzystana jako narzędzie do analizy rynku, w szczególności do zarządzania strategicznym pozycjonowaniem marki i tworzenia strategii komunikacyjnych firm.

3

Analysis of the possibility of using archival maps as a source of elevation data

Cichociński Piotr

GIS Odyssey Journal

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2021

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Vol. 1, no. 1

177--188

EN

One of the most popular sources of elevation data covering the most of the Earth's surface with spatial resolution of up to 30 m (1 angular second to be exact) is the SRTM model. This terrain model has two main disadvantages: it covers the area of the Earth between the parallels 54°S and 60°N only, and in some mountainous and desert areas there are gaps (voids) in the data. Additionally, it may not be suitable for more detailed visualization and analysis due to their limited accuracy. Therefore, the paper attempts to find an alternative source of elevation data. One of them may be archival maps, on which the terrain is presented by means of contours. By vectorization of such lines and adding respective attributes they can serve as a base for building digital terrain models. Examples of such maps are maps created in the period before World War II by Polish Military Geographical Institute (WIG). Although newer topographic maps or even more accurate spatial databases exist, it is assumed that as official materials WIG maps were not covered by copyright, so they are in public domain, just like SRTM. Conducted research and literature studies have shown that the issue of using contours extracted from archival topographic maps is not unambiguous. The lack of reproducibility in the results obtained does not allow making clear recommendations on the feasibility of using archival maps. Using a contour drawing as the sole source of elevation data, without any control, should be considered risky. On the other hand, it seems possible to use them as supplementary and perhaps refining material, but only in places where consistency with other data can be observed.

4

A rapid algebraic 3D volume image reconstruction technique for cone beam computed tomography

Al-masni M. A., Al-antari M. A., Metwally M. K., Kadah Y. M., Han S. M., Kim T. S.

Biocybernetics and Biomedical Engineering

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2017

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Vol. 37, no. 4

619--629

EN

Computed tomography (CT) is a widely used imaging technique in medical diagnosis. Among the latest advances in CT imaging techniques, the use of cone-beam X-ray projections, instead of the usual planar fan beam, promises faster yet safer 3D imaging in comparison to the previous CT imaging methodologies. This technique is called Cone Beam CT (CBCT). However, these advantages come at the expense of a more challenging 3D reconstruction problem that is still an active research area to improve the speed and quality of image reconstruction. In this paper, we propose a rapid parallel Multiplicative Algebraic Reconstruction Technique (rpMART) via a vectorization process for CBCT which gives more accurate and faster reconstruction even with a lower number of projections via parallel computing. We have compared rpMART with the parallel version of Algebraic Reconstruction Technique (pART) and the conventional non-parallel versions of npART, npMART and Feldkamp, Davis, and Kress (npFDK) techniques. The results indicate that the reconstructed volume images from rpMART provide a higher image quality index of 0.99 than the indices of pART and npFDK of 0.80 and 0.39, respectively. Also the proposed implementation of rpMART and pART via parallel computing significantly reduce the reconstruction time from more than 6 h with npART and npMART to 580 and 560 s with the full 360° projections data, respectively. We consider that rpMART could be a better image reconstruction technique for CBCT in clinical applications instead of the widely used FDK method.

5

Metoda wektoryzacji obrazu sceny dla autonomicznego robota

Śmigielski P.

Technical Issues

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2015

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nr 4

32--38

EN

The aim of the studies was to design, implement and test the algorithm for vectorization of the scene, which is analyzed by an autonomous robot. The vectorization is the process of extraction of the contours of the objects located in the image taken by a camera. The result is stored in a computer's (robot's) memory as a sequence of points in euclidean space marking the examined objects' corners. During the tests, various images were used. Each one was previously pre-processed in a different way in order to reveal and highlight the contours of the objects. The vectorization process is divided into three steps which are described in detail in this article.

6

Mapa geomorfologiczna województw pomorskiego i warmińsko-mazurskiego z wykorzystaniem metod geoinformatycznych

Marcinkowska A., Ochtyra A., Olędzki J. R., Wołk-Musiał E., Zagajewski B.

Teledetekcja Środowiska

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2013

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T. 49

43--79

EN

The aim of this study was to prepare geomorphological maps of pomorskie and warminsko-mazurskie voivodeships in scale 1:300 000. Analysis primarily were based on the General Geomorphological Map of Poland 1:500 000 and Landsat 5 TM satellite images in RGB 453 composition, and alternatively with Geological Map of Poland 1:200 000, Topographic Map of Poland 1:100 000 and Digital Terrain Model from Shuttle Radar Topography Mission. These materials were processed into digital form and imported them PUWG 1992 coordinate system. Based on them was lead interpretation and vectorization of geomorphological forms. It was detailing the boundaries in accordance with the content of the General Geomorphological Map of Poland 1:500 000. Then polygons were coded according to the numbering of J. Borzuchowski (2010). Very important was process to design a legend and then editing maps. The last stage of this study was to prepare a composition for printing maps. The effect of studies are geomorphological maps of pomorskie and warminsko-mazurskie voivodeships in scale 1:300 000, and an interactive databases in ESRI shapefile format (*.shp).

7

Uzyskanie zadanych pól powierzchni wieloboków uogólnionych poprzez modyfikację uwarunkowaną współrzędnych wierzchołków w systemach GIS

Ligęza A.

Studia Informatica

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2012

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Vol. 33, nr 2B

91-104

PL

W niniejszym opracowaniu przedstawiono procedurę, która umożliwia uzyskanie - w warstwie GIS, którą tworzą wieloboki uogólnione - zadanych pól powierzchni, przez modyfikację, spełniającą określone warunki funkcyjne, współrzędnych wierzchołków wieloboków. Przykładowe wykorzystanie wprowadzonej procedury przedstawiono dla warstwy działek ewidencyjnych z Systemu Ewidencji Gruntów i Budynków.

EN

The article presents the procedure of obtaining the areas of generalized polygons by conditioned modification of vertices coordinates. In the practical use, the procedure was presented for the cadastral parcels layer, managed by the Polish Land and Building Register.

8

A knowledge-based framework for geographic map image analysis

Stąpor K.

Machine Graphics and Vision

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2000

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Vol. 9, No. 3

647-671

EN

In this paper a flexible and generally applicable knowledge--based framework for large-scale geographic map image analysis is proposed. The described framework is composed of three schemas, namely: map model, object detectors and image analysis flow scheme. A new, efficient hybrid knowledge representation scheme, and a flaxible, mixed control strategy based on reasoning with incomplete information are proposed. To increase reliability and accuracy of map image analysis, accumulation of information from defferent sources is used. The proposed approach has been implemented in the map conversion module MAPIN of the Integrated Spatial Organization System SIT, [20].