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Wyświetlanie 1-10 z 15
Tytuł:
The Inverse Reaction Cross Sections for Some Charged Particles Using the Optical Model Parameters
Autorzy:
Ahmed, Rasha S.
Powiązania:
https://bibliotekanauki.pl/articles/1193016.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Optical reaction cross-sections
charged particles
neutrons
pre-equilibrium models
Opis:
p-nucleus, (_1^2)H-nucleus, (_1^3)H-nucleus, and (_2^4)He-nucleus inverse reaction cross sections have been determined using the optical model potentials in a wide range of target nuclei started from A=1 to A=232 using several incident particle energies ( E = 2, 8, 10, 20, and 40 MeV). In this work, a large number of optical model available parameters were used to calculate the inverse reaction cross section and compared to investigate the effect of the mass number and incident particle energy on the inverse reaction cross section. All the calculations were performed using MATHLAB programming language.
Źródło:
World Scientific News; 2016, 28; 72-83
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3D scanning of the painting for the purpose of performing a measurement of deformations of the wooden panel painting support
Autorzy:
Lewandowski, M.
Kubik, H.
Gębarski, K.
Powiązania:
https://bibliotekanauki.pl/articles/1396458.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
3D scanning
point clouds
cross-sections
deviation color map
Opis:
The person ordering the research was Mr. Andrzej Cichy of the Faculty of Wood Technology at the Warsaw University of Life Sciences. The painting was made available from his private collection. The aim of the research conducted by SMARTTECH was to study the impact of changes in humidity on the deformation of a wooden panel painting support.
Źródło:
Advanced Technologies in Mechanics; 2016, 3, no. 2 (7); 26-33
2392-0327
Pojawia się w:
Advanced Technologies in Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
$K_{β}/K_{α}$ X-Ray Intensity Ratios for Cr, Mn, Fe, and Co Excited by 8.735 keV Energy
Autorzy:
Yılmaz, R.
Powiązania:
https://bibliotekanauki.pl/articles/1398200.pdf
Data publikacji:
2018-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
K X-ray intensity ratios
X-ray fluorescence
cross-sections
Opis:
In this study, the K shell intensity ratios $K_{β}/K_{α}$ have been experimentally determined for the elements Cr, Mn, Fe, and Co. Measurements have been carried out at 8.735 keV excitation energy by using secondary excitation method. K X-rays emitted by samples have been counted by a Si (Li) detector with 160 eV resolutions at 5.9 keV. The measured values were compared with the calculated theoretical values. The obtained values are in good agreement with the calculated values.
Źródło:
Acta Physica Polonica A; 2018, 133, 5; 1227-1230
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Crustal-scale complexity of the contact zone between the Palaeozoic Platform and the East European Craton in the NWPoland
Autorzy:
Królikowski, C.
Powiązania:
https://bibliotekanauki.pl/articles/2058936.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
edge of the craton
seismic cross-sections
magnetic anomalies
geothermal field
Opis:
Hypotheses on the trace and nature of the SW margin of the East European Craton (EEC) are reviewed. As new geophysical data was acquired, the location of the EEC margin was repeatedly revised.Magnetic anomalies associated with the SWpart of the EEC and their relationship with the contact zone between the EEC and the Palaeozoic Platform are described. Based on an analysis of magnetic anomalies, seismic cross-sections, the LT-7, P1, P2 and P4 wide-angle reflection and refraction profiles, and the results of recent geothermal modeling, the geometry of the contact zone between the EEC and the Palaeozoic Platform in NW Poland has been redefined. Three important boundaries are distinguished, namely the Teisseyre-Tornquist Line marking the SW limit of the EEC at upper and middle crustal levels, the SW margin of the West Pomeranian Magnetic Anomaly that delimits the NE extension of the reversely magnetised lower crust of the Palaeozoic Platform, and the SWtermination of the high velocity lower crust of the EEC. These boundaries and their characteristics reflect the tectonic complexity of the SW margin of the EEC in its Polish sector.
Źródło:
Geological Quarterly; 2006, 50, 1; 33-42
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New method of pure 111In production by proton-induced nuclear reactions with enriched 112 Sn
Autorzy:
Betak, E.
Rurarz, E.
Mikołajewski, S.
Wojtkowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/148256.pdf
Data publikacji:
2007
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cross sections
Sn isotopes
proton-induced reactions
111In production
diagnostic radioisotope
Opis:
We aimed at finding out a simple and reliable way of 111In production with the highest radionuclide purity from its grand parent 111Sb and parent 111Sn nuclei, produced by the 112Sn(p,2n)111Sb and 112Sn(p,pn)111Sn reactions, respectively. The target was a metallic 112Sn sample enriched to 84%. We have measured activation cross sections for seven reactions on an enriched 112Sn sample induced by 23.6 š 0.8 MeV energy protons. Gamma-ray spectroscopy with high-purity germanium detectors has been used. We also identified the activities of 55Co (T1/2 = 17.5 h) and 60Cu (T1/2 = 23.7 min) in proton beam monitoring Ni foils, induced in the natNi(p,X)55Co and natNi(p,X)60Cu reactions at 22.8 MeV proton energy. The cross sections determined for these reactions are: s[natNi(p,X)55Co] = 36.6 š 4 mb and s[natNi(p,X)60Cu] = 64.4 š 7 mb. The measured cross sections of reactions on tin isotopes are: sigma[112Sn(p,n)112Sb] = 4 š 0.8 mb; sigma[112Sn(p,2n)111Sb] = 182 š 26 mb; sigma[112Sn(p,pn)111Sn] = 307 š 35 mb; sigma[114Sn(p,2n)113Sb] = 442 š 52 mb; s[117Sn(p,n)117Sb] = 15 š 3 mb; sigma[117Sn(p,p’gamma)117mSn] = 0.37 š 0.06 mb; s[115Sn(p,2p)114m2In] = 0.01 š 0.002 mb. Our measurements indicated the expected yield of the 111In production to be 46 MBq/mAh (1.2 mCi/mi Ah). The contamination of 111In by the undesired nuclide 114m2In was determined and belongs to the smallest ones found in the literature. The measured cross sections were compared with theoretical calculations by two top-level nuclear reaction codes EMPIRE and TALYS.
Źródło:
Nukleonika; 2007, 52, 1; 17-27
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy concepts involved in MOS characterization
Autorzy:
Engström, O.
Gutt, T.
Przewłocki, H. M.
Powiązania:
https://bibliotekanauki.pl/articles/308781.pdf
Data publikacji:
2007
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
C-V technique
capture cross sections
interface states
Meyer-Neldel rule
MOS
thermally stimulated current
Opis:
Starting from a quantum statistical reasoning, it is demonstrated that entropy properties of silicon/silicon dioxide interface electron traps may have a strong influence on measured distributions of interface states, depending on measurement method used. For methods, where the Fermi-level is used as a probe to define an energy position, the scale is based on free energy. On the other hand, methods based on thermal activation of electrons give the distribution on an enthalpy scale. It is shown that measured interface state distributions are influenced by the distribution of entropy, and that common features of measured energy distributions may be influenced by entropy variations. These results are used to interpret experimental data on the energy distribution of electron capture cross sections with an exponential increase followed by a more or less constant value as the energy distance of the traps from the conduction band edge increases. Such a relation is shown to be consistent with a situation where the emission and capture processes of electrons obey the Meyer-Neldel rule.
Źródło:
Journal of Telecommunications and Information Technology; 2007, 2; 86-91
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ położenia styku na wysokości żelbetowych elementów zespolonych o przekroju teowym na stan graniczny zarysowania styku
Influence of the interface location at the height of composite reinforced concrete elements on the interface crack limit state
Autorzy:
Jabłoński, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/390254.pdf
Data publikacji:
2014
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
żelbetowe belki zespolone
przekrój teowy
zarysowanie styku
concrete composite beams
T-shape cross-sections
interface
delamination
Opis:
W pracy zrelacjonowano badania żelbetowych belek zespolonych o przekroju teowym z różnie usytuowanym stykiem. Analizowano obraz zarysowania belek oraz wartości sił, przy których nastąpiło zarysowanie styku. Wykonano również obliczeniową analizę wpływu położenia styku oraz różnicy modułów sprężystości łączonych betonów na wartość naprężeń w styku.
In this paper the results of the research of T-shape cross-section beams with differently located interface are presented. The cracks pattern and the value of the force causing the interface cracking are analysed. Moreover, the influence of the interface location and the difference of the elastic moduli of joint materials on the stress level in the interface were also analysed.
Źródło:
Budownictwo i Architektura; 2014, 13, 3; 95-102
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strength of eccentrically tensioned reinforced concrete structures with small eccentricities by normal sections
Autorzy:
Dmytrenko, Yevhen
Yakovenko, Ihor
Fesenko, Oleg
Powiązania:
https://bibliotekanauki.pl/articles/35540855.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
reinforced concrete structures
deformation model
two-line stress-strain diagram
non-eccentric tension
small eccentricities
normal cross sections
Opis:
It is implemented the method of normal rectangular sections slab (shell) reinforced concrete elements strength calculating with flat eccentric tensile strength using the deformation m ethod. The results of the calculation are analyzed for the case of eccentric tension with small eccentricities with varying next parameters: the height of the cross section and the reinforcement coefficient. It is investigated the character of diagrams condition change of section “N - εc(1)” at gradual change of the stress-strain state from eccentric to the central tension. It is revealed that when the eccentricity of external forces decreases, the compressed zone of concrete decreases until its complete disappearance, and at rather small values of eccentricities of force application the balance between external and internal forces cannot be found by the method of current norms. An equilibrium is found between internal and external forces only at a two-digit diagram of the distribution of relative longitudinal deformations (in the case of a compressed zone). Variants of the given problem decision without considerable loss of calculations accuracy are offered, the most expedient of which is transition to algorithm of calculation by a method of limiting efforts. It was accepted as the basic in the previous building norms. The results of numerical calculations performed in the software complex “Lira-CAD” and the corresponding mathematical modeling confirmed the rationality and allowable accuracy of further calculations by this method.
Źródło:
Scientific Review Engineering and Environmental Sciences; 2021, 30, 3; 424-438
1732-9353
Pojawia się w:
Scientific Review Engineering and Environmental Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On representative functions method for clustering of 2D contours with application to pottery fragments typology
Autorzy:
Kaliszewska, A.
Syga, M.
Powiązania:
https://bibliotekanauki.pl/articles/205512.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
shape representation
2D contours
cross-sections
rotationally symmetric objects
representative functions
clustering
dynamic time warping (DTW) distance
Opis:
We investigate clustering of 2D contours which represent cross-sections of rotationally symmetric objects. We propose modifications of the existing representations of digitized 2D contours and similarity measures. In particular, we represent each of the investigated objects as a single number and two functions and we use the DTW distance to measure their similarity. We apply our method to clustering of pottery fragments.
Źródło:
Control and Cybernetics; 2018, 47, 1; 85-108
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania nośności belek żelbetowych wzmocnionych pod obciążeniem przez obetonowanie
Investigation of the bearing capacity of reinforced concrete beams strengthened with reinforced concrete ring under load
Autorzy:
Blikharskyy, Z
Dubizhanskyy, D
Khmil, R.
Powiązania:
https://bibliotekanauki.pl/articles/390083.pdf
Data publikacji:
2014
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
belka żelbetowa
przekroje normalne
wzmocnienie
obetonowanie
reinforced concrete
normal cross sections
strengthening under load
reinforced concrete ring
bearing capacity
Opis:
Badano nośność żelbetowych belek zginanych wzmocnionych przez obetonowanie. Przebadano 16 belek zgrupowanych w 4 seriach. Ustalano stan naprężeniowo-odkształceniowy belek w zależności od poziomu obciążenia przy którym realizowano wzmocnienie, a także przyrost nośności wynikający z tego wzmocnienia. Zidentyfikowano trzy charakterystyczne etapy zmian tego stanu. Zaprezentowano wyniki badań nośności wzmocnionych belek i obliczono efektywność wzmocnienia. Ustalono także wpływ stopnia zbrojenia obetonowania na tę efektywność.
Bearing capacity of normal cross section of bending concrete elements reinforced with reinforced concrete ring under load was investigated. Experimental researches of 4 sets of beams with the total number of 16 units were carried out. The results of changes of stress-strain state settings depending on the load level, additional reinforcement, influence of limit level load were analyzed. The three characteristic stages of stress-strain state of reinforced concrete beams strengthened with reinforced concrete ring were defined. Results of experimental investigations of bearing capacity of normal cross section of strengthened beams with reinforced concrete ring under load were presented. Enhancing effect was calculated. According to the results of researches of strengthened beams plots of strain of working armature depending on current bending moment were constructed.
Źródło:
Budownictwo i Architektura; 2014, 13, 3; 65-70
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 15

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