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Tytuł:
Silicon everywhere
Autorzy:
Jakubowski, K. J.
Powiązania:
https://bibliotekanauki.pl/articles/308053.pdf
Data publikacji:
2004
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
krzem
krzemionka
kwarc
struktura
silicon
silica
quartz
geo-chemical structure
Opis:
The paper discusses the ubiquity of silicon and its compounds in the geo-chemical structure of the Earth. The dominant role of mineral oxidized compounds of silicon as the building material of the primordial magma, metamorphic and sedimentary rocks is also shown. The reader's attention is also attracted to the numerous varieties of silicon compounds valued for their intrinsic beauty. Finally, methods of silicon production for electronics purposes are briefly addressed.
Źródło:
Journal of Telecommunications and Information Technology; 2004, 1; 3-6
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stefan Kozłowski. Przyszłość ekorozwoju
Autorzy:
Jakubowski, K.J.
Powiązania:
https://bibliotekanauki.pl/articles/217588.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Konserwatorów Zabytków
Tematy:
Przyszłość ekorozwoju
Kozłowski Stefan
architektura
future of sustainability
Kozlowski Stefan
architecture
Opis:
Dzieło Profesora Stefana Kozłowskiego Przyszłość ekorozwoju zajmuje w Jego bogatym dorobku piśmienniczym pozycję szczególną. Sumuje ono bowiem nie tylko stan współczesnej wiedzy w zakresie kształtowania się koncepcji zrównoważonego rozwoju w skali międzynarodowej, ale także ilustruje ogromny wkład Profesora w tworzenie merytorycznych i organizacyjnych podstaw krajowej strategii ekorozwoju. Przedwczesna śmierć Profesora S. Kozłowskiego (17.09.2007) sprawiła, że jest to zarazem ostatnia Jego publikacja, która ukazała się drukiem za życia Autora.
The work of Professor Stefan Kozlowski future of sustainability is in his extensive literary output a special position. It sums up not only the state of contemporary knowledge in the development of the concept of sustainable development at the international level, but also the contribution of Professor ilustrujeogromny in creating substantive and organizational basis for a national strategy for sustainable development. The premature death of Professor S. Kozlowski (17.09.2007) meant that this is also the last of his publication, which appeared in print for the life of the author.
Źródło:
Wiadomości Konserwatorskie; 2007, 22; 115-116
0860-2395
2544-8870
Pojawia się w:
Wiadomości Konserwatorskie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The biomechanical formation of trees
Autorzy:
Jelonek, T.
Tomczak, A.
Karaszewski, Z.
Jakubowski, M.
Arasimowicz-Jelonek, M.
Grzywinski, W.
Kopaczyk, J.
Klimek, K.
Powiązania:
https://bibliotekanauki.pl/articles/52724.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Źródło:
Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2019, 62, 204
1644-3985
Pojawia się w:
Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Code calculations for local stability of shaft guides
Autorzy:
Fiołek, P.
Jakubowski, J.
Tomczak, K.
Powiązania:
https://bibliotekanauki.pl/articles/178575.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
shaft steelwork
corrosion loss
local buckling
steel profile
FEM simulation
Opis:
Steel structures for a conveyance guiding system are subjected to prolonged, intense corrosion during their operation leading to a considerable loss of material and structure capacity reduction. Shaft guides are made of closed profiles welded from hotrolled channel sections. These profiles are categorized as class 1 cross-sections according to Eurocode 3, which means that they are resistant to local instability upon bending [1]. With an increase in the corrosion loss of the guides, the inertia moment of the crosssection is reduced. The resistance of profiles to local buckling is also reduced. However, calculations for local stability in guides upon bending are not required by the local Polish regulations on the operation of conveyance in shafts [2]. The question is whether this constitutes a shortcoming and risk for safe operation. Calculations according to steel construction standards [1] supported by numerical simulation were used to evaluate shaft steelwork guides resistance to buckling and their sensitivity to corrosion loss. It was shown that the guides of corrosion loss of 52-63%, depending on profile size, are prone to local buckling.
Źródło:
Studia Geotechnica et Mechanica; 2017, 39, 3; 11-16
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimation of ISTTOK runaway - electrons energies by means of a Cherenkov - type probe with modified AlN radiators
Autorzy:
Jakubowski, L.
Plyusnin, V. V.
Sadowski, M. J.
Zebrowski, J.
Malinowski, K.
Rabiński, M.
Fernandes, H.
Silva, C.
Duarte, P.
Jakubowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/147516.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ISTTOK
runaway electrons
Cherenkov detector
AlN radiators
Opis:
Measurements of fast electrons, as performed during recent few years in small tokamaks, demonstrated that detectors based on the Cherenkov effect are very useful tools for such studies. The modernized measuring heads, which were equipped with miniature aluminum-nitride (AlN) radiators, enabled to determine locations and instants of the fast electrons emission and to estimate their energy. A comparison of four measuring channels showed that in ISTTOK the most important role was played by electrons of energy less than 90 keV.
Źródło:
Nukleonika; 2012, 57, 2; 177-181
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of selected techniques of maceration bones of Gallus gallus domesticus
Charakterystyka wybranych technik maceracji kości Gallus gallus domesticus
Autorzy:
Kempa, K.
Kulawik, M.
Bartyzel, B.J.
Jakubowski, M.
Skubis, J.
Koczon, P.
Powiązania:
https://bibliotekanauki.pl/articles/82524.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Źródło:
Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica; 2016, 39, 3(328)
2081-1284
Pojawia się w:
Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic Extraction of the Pelvicalyceal System for Preoperative Planning of Minimally Invasive Procedures
Autorzy:
Heryan, K.
Skalski, A.
Jakubowski, J.
Drewniak, T.
Gajda, J.
Powiązania:
https://bibliotekanauki.pl/articles/220364.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pelvicalyceal system segmentation
kidney segmentation
kidney compartments
Computed Tomography (CT)
kidney cancer
Opis:
Minimally invasive procedures for the kidney tumour removal require a 3D visualization of topological relations between kidney, cancer, the pelvicalyceal system and the renal vascular tree. In this paper, a novel methodology of the pelvicalyceal system segmentation is presented. It consists of four following steps: ROI designation, automatic threshold calculation for binarization (approximation of the histogram image data with three exponential functions), automatic extraction of the pelvicalyceal system parts and segmentation by the Locally Adaptive Region Growing algorithm. The proposed method was applied successfully on the Computed Tomography database consisting of 48 kidneys both healthy and cancer affected. The quantitative evaluation (comparison to manual segmentation) and visual assessment proved its effectiveness. The Dice Coefficient of Similarity is equal to 0.871 ± 0.060 and the average Hausdorff distance 0.46 ± 0.36 mm. Additionally, to provide a reliable assessment of the proposed method, it was compared with three other methods. The proposed method is robust regardless of the image acquisition mode, spatial resolution and range of image values. The same framework may be applied to further medical applications beyond preoperative planning for partial nephrectomy enabling to visually assess and to measure the pelvicalyceal system by medical doctors.
Źródło:
Metrology and Measurement Systems; 2017, 24, 1; 3-18
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Precipitation variation in the Widawa River basin in the multi-year period 1956-2012
Autorzy:
Włodek, S.
Pawęska, K.
Biskupski, A.
Sikora, J.
Sekutowski, T. R.
Maga, J.
Jakubowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/100981.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
precipitation
Widawa River basin
multi-year period
Opis:
The paper analyses results of measurements of precipitation amounts in the Widawa River basin in the multi-year period 1956-2012. Analysed were annual, monthly and daily precipitation totals and the numbers of days with precipitation in a year and in a month. Trends of changes were determined and extreme monthly and daily precipitation totals were analysed. Annual precipitation totals over the analysed multi-year period were very strongly diversified. Despite a considerable spread of results, the distribution in time did not reveal any clear tendency of changes, the trend line was almost horizontal. The number of days in a year with precipitation revealed an obvious decreasing trend, particularly within the fraction of days with precipitation <1mm. Average daily precipitation obtained from the ratio of annual precipitation total and the number of days with precipitation showed a growing tendency. December was the month in which the highest number of days with precipitation was noted during the multi-year period 1956-2012. Considering the fewest number of days with precipitation, similar results were obtained for three months. In May and September the least number of days with precipitation was registered eleven times. Only once a less often mentioned number of days occurred in October. A summary of maximum numbers of days with precipitation occurring over a month revealed a declining trend. The diagram of the least number of days with precipitation in a month also revealed a decreasing tendency.
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2016, IV/4; 1947-1959
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kidney Segmentation in CT Data Using Hybrid Level-Set Method with Ellipsoidal Shape Constraints
Autorzy:
Skalski, A.
Heryan, K.
Jakubowski, J.
Drewniak, T.
Powiązania:
https://bibliotekanauki.pl/articles/221728.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Level Set method
kidney
CT data
image segmentation
ellipsoid
Opis:
With development of medical diagnostic and imaging techniques the sparing surgeries are facilitated. Renal cancer is one of examples. In order to minimize the amount of healthy kidney removed during the treatment procedure, it is essential to design a system that provides three-dimensional visualization prior to the surgery. The information about location of crucial structures (e.g. kidney, renal ureter and arteries) and their mutual spatial arrangement should be delivered to the operator. The introduction of such a system meets both the requirements and expectations of oncological surgeons. In this paper, we present one of the most important steps towards building such a system: a new approach to kidney segmentation from Computed Tomography data. The segmentation is based on the Active Contour Method using the Level Set (LS) framework. During the segmentation process the energy functional describing an image is the subject to minimize. The functional proposed in this paper consists of four terms. In contrast to the original approach containing solely the region and boundary terms, the ellipsoidal shape constraint was also introduced. This additional limitation imposed on evolution of the function prevents from leakage to undesired regions. The proposed methodology was tested on 10 Computed Tomography scans from patients diagnosed with renal cancer. The database contained the results of studies performed in several medical centers and on different devices. The average effectiveness of the proposed solution regarding the Dice Coefficient and average Hausdorff distance was equal to 0.862 and 2.37 mm, respectively. Both the qualitative and quantitative evaluations confirm effectiveness of the proposed solution.
Źródło:
Metrology and Measurement Systems; 2017, 24, 1; 101-112
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
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