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Tytuł:
Badania postępu procesu abrazji brzegów zbiornika Czorsztyn-Niedzica
Investigations on the abrasion process of Czorsztyn-Niedzica Reservoir banks
Autorzy:
Zydroń, T.
Kozielska-Sroka, E.
Michalski, P.
Dryś, D.
Kruk, E.
Płonka, M.
Powiązania:
https://bibliotekanauki.pl/articles/349244.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
abrazja
zbiornik Czorsztyn-Niedzica
abrasion
Czorsztyn-Niedzica reservoir
Opis:
W artykule przedstawiono wyniki badań i analiz prowadzonych nad abrazją nieubezpieczonych brzegów Jeziora Czorsztyńskiego od strony Pienińskiego Parku Narodowego w okresie 2003-2008. Wykazano w nim wyraźne zależności pomiędzy wysokością i szybkością cofania się klifu abrazyjnego oraz kubaturą wyerodowanego materiału a nachyleniem skarp pierwotnych, zmianami poziomów wód w zbiorniku i uziarnieniem gruntów tworzących obrzeża.
The results of tests and analyses carried out on the abrasion of non-protected banks of Czorsztyn Reservoir on the side of Pieniny National Park in the period of 2003-2008 are presented in the paper. Clear relationships between height and rate of removing of abrasion cliff, amounts of the material eroded out and inclination of original slopes, changes of water level in reservoir and granulation of soils in the banks were revealed.
Źródło:
Górnictwo i Geoinżynieria; 2010, 34, 2; 663-673
1732-6702
Pojawia się w:
Górnictwo i Geoinżynieria
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Finite Element Prediction for the Internal Stresses of (Ti,Al)N Coatings
Autorzy:
Żukowska, L. W.
Śliwa, A.
Mikuła, J.
Bonek, M.
Kwaśny, W.
Sroka, M.
Pakuła, D.
Powiązania:
https://bibliotekanauki.pl/articles/354118.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
analysing and modelling
PVD coatings
gradient coatings
internal stresses
Opis:
The general topic of this paper is the computer simulation with use of finite element method (FEM) for determining the internal stresses of selected gradient and single-layer PVD coatings deposited on the sintered tool materials, including cemented carbides, cermets and Al2O3+TiC type oxide tool ceramics by cathodic arc evaporation CAE-PVD method. Developing an appropriate model allows the prediction of properties of PVD coatings, which are also the criterion of their selection for specific items, based on the parameters of technological processes. In addition, developed model can to a large extent eliminate the need for expensive and time-consuming experimental studies for the computer simulation. Developed models of internal stresses were performed with use of finite element method in ANSYS environment. The experimental values of stresses were calculated using the X-ray sin2ψ technique. The computer simulation results were compared with the experimental results. Microhardness and adhesion as well as wear range were measured to investigate the influence of stress distribution on the mechanical and functional properties of coatings. It was stated that occurrence of compressive stresses on the surface of gradient coating has advantageous influence on their mechanical properties, especially on microhardness. Absolute value reduction of internal stresses in the connection zone in case of the gradient coatings takes profitably effects on improvement the adhesion of coatings. It can be one of the most important reasons of increase the wear resistance of gradient coatings in comparison to single-layer coatings.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 1; 149-152
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the precipitation process of secondary phases after long-term ageing of the S304H steel
Autorzy:
Zieliński, Adam
Wersta, Robert
Sroka, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2086867.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
S304H steel
microstructure
precipitates
ageing
loss of durability
stal S304H
mikrostruktura
wytrącanie
starzenie
utrata trwałości
Opis:
S304H steel is used in the construction of pressure components of boilers with supercritical operating parameters. The paper presents the results of research on the microstructure following ageing for 30,000 hours at 650 and 700°C. Microstructure examination was performed using scanning and transmission electron microscopy. The precipitates were identified using transmission electron microscopy. The paper analyses the precipitation process and its dynamics depending on the temperature and ageing time in detail. MX carbonitrides and the ε_Cu phase were proved to be the most stable phase, regardless of the test temperature. It was also showed that the M₂₃C₆ carbide precipitates in the tested steel and the intermetallic sigma phase (σ) may play a significant role in the loss of durability of the tested steel. This is related to their significant increase due to the influence of elevated temperature, and their coagulation and coalescence dynamics strongly depend on the ageing/operating temperature level. The qualitative and quantitative identification of the secondary phase precipitation processes described in the study is important in the analysis of the loss of durability of the tested steel under creep conditions.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 5; e137520, 1--7
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties of Super 304H steel after long-term ageing at 650 and 700°C
Autorzy:
Zieliński, Adam
Sroka, Marek
Purzyńska, Hanna
Novy, Frantisek
Powiązania:
https://bibliotekanauki.pl/articles/2204537.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Super 304H steel
mechanical properties
ageing
stal Super 304H
właściwości mechaniczne
starzenie się
Opis:
The paper shows the degradation process of the modern austenitic Super 304H (X10CrNiCuNb18-9-3) steel which was subjected to long-term aging for up to 50,000 h at 650 and 700°C. The investigations include microstructure examination (SEM), identification and analysis of the precipitation process, and mechanical properties tests. The Super 304H steel has a structure characteristic of austenitic steels with visible annealing twins and single primary NbX precipitates. Long-term aging in the steel leads to numerous precipitation processes of M23C6, MX carbides, σ phase, Z phase, and ε-Cu phase. Precipitation processes lead to a decrease in plastic properties and impact energy as well as alloy over aging. Yield strength and tensile strength values after 50,000 h of aging were similar to those as delivered. The yield and tensile strength value strongly depend on the applied aging temperature.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 2; art. no. e144612
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Creep Resistance of VM12 Steel
Autorzy:
Zieliński, A.
Golański, G.
Dobrzański, J.
Sroka, M.
Powiązania:
https://bibliotekanauki.pl/articles/351509.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
creep resistance
VM12 steel
elements of boilers with super- and ultra-critical steam parameters
Opis:
This article presents selected material characteristics of VM12 steel used for elements of boilers with super- and ultra-critical steam parameters. In particular, abridged and long-term creep tests with and without elongation measurement during testing and investigations of microstructural changes due to long-term impact of temperature and stress were carried out. The practical aspect of the use of creep test results in forecasting the durability of materials operating under creep conditions was presented. The characteristics of steels with regard to creep tests developed in this paper are used in assessment of changes in functional properties of the material of elements operating under creep conditions.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1635-1640
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forecasting the Particle Diameter Size Distribution in P92 (X10CrWMoVNb9-2) Steel After Long-Term Ageing at 600 and 650°C
Autorzy:
Zieliński, A.
Sroka, M.
Miczka, M.
Śliwa, A.
Powiązania:
https://bibliotekanauki.pl/articles/355265.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
P92 steel
microstructure
precipitates
statistics
forecasting
Opis:
The investigations on microstructure of P92 steel in the as-received condition and after 105h ageing at 600 and 650°C were carried out. For the recorded images of microstructure, the quantitative analysis of precipitates was performed. On that basis, a statistical analysis of collected data was made with the aim of estimating parameters of selected theoretical statistical distribution. Then, the forecast for average precipitate diameter and standard deviation of such a distribution for the time of 1,5*105h at 600 and 650°C was calculated. The obtained results of investigations confirm the possibility of using, in evaluation of degradation degree for materials in use, the forecasting methods derived from mathematical statistics, in particular the theory of stochastic processes and methods of forecasting by analogy.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 753-760
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Long-Term Impact of Elevated Temperature on Changes in Microstructure and Mechanical Properties of HR3C Steel
Autorzy:
Zieliński, A.
Sroka, M.
Hernas, A.
Kremzer, M.
Powiązania:
https://bibliotekanauki.pl/articles/353972.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
HR3C steel
high temperature aging
microstructure
mechanical properties
Opis:
The HR3C is a new steel for pressure components used in the construction of boilers with supercritical working parameters. In the HR3C steel, due to adding Nb and N, the compounds such as MX, CrNbN and M23C6 precipitate during service at elevated temperature, resulting in changes in mechanical properties. This paper presents the results of microstructure investigations after ageing at 650, 700 and 750°C for 5,000 h. The microstructure investigations were carried out using scanning and transmission electron microscopy. The qualitative and quantitative identification of the existing precipitates was carried out using X-ray analysis of phase composition. The effect elevated temperature on microstructure and mechanical properties of the examined steel was described.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 761-766
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aplikacja w języku Java realizująca funkcję parsera pseudokodu opisującego strukturę specjalizowanego koprocesora sterownika PLC do VHDL
Application in Java language realizing the function parser of pseudocode describing structure of a specialized coprocessor of PLC in VHDL
Autorzy:
Ziębiński, A.
Cupek, R.
Sroka, W.
Powiązania:
https://bibliotekanauki.pl/articles/155177.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
FPGA
Java
PLC
systemy wbudowane
VHDL
embedded systems
Opis:
Artykuł przedstawia koncepcję projektowania w VHDL systemu pełniącego funkcję specjalizowanego koprocesora sterownika PLC, realizującego tylko wyszczególniony zestaw zadań. W pracy pokrótce omówiono poszczególne moduły realizujące funkcję koprocesora sterownika PLC. Ponadto przedstawiono funkcjonalność parsera pseudokodu w języku Java, opisującego strukturę specjalizowanego sterownika PLC do VHDL. Na końcu zaprezentowano wyniki porównania działania przykładowej aplikacji w sterowniku PLC GE Fanuc CPUE05 i układzie FPGA XC3S500e.
The paper presents a project of embedded system realization on a FPGA array, fulfilling the function of a specialized coprocessor PLC. There are described individual modules realizing the function of the coprocessor of PLC in VHDL: the memory map of the controller (Fig.1) including the controller registers and the controller of the memory (Fig.2) for read/write the data in the registers. Moreover, functionality of the parser of pseudocode in the Java language, describing the structure of specialized PLC to VHDL, is presented. The components in VHDL [4] used by the parser are described in the pseudocode and presented in Table 1. The instructions in the pseudocode are equivalent to those in the GE-Fanuc Versa Max controller family. The comparison results of working of an exemplary application in PLC GE Fanuc Versa Max CPUE05 [3] and FPGA XC3S500e are given. The exemplary application for the controller is shown in Fig. 3. As a result of parsering by the PLC2VHDL program there was re-ceived the code in VHDL realizing the described task (Fig.4). The code VHDL was subjected to testing, synthesis and implementation with utilization of tools ISE ™ Foundation ™. As a result of implementation, there was obtained the configurational file for the FPGA. The project takes about 1 % resources in the XC3S500e and can work with the maximum 79MHz. The controller work cycle (Fig.5) in FPGA takes 3 tacts and lasts 37.863ns.
Źródło:
Pomiary Automatyka Kontrola; 2011, R. 57, nr 8, 8; 845-847
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of Corruption Scandals on Government Accountability
Autorzy:
Żerkowska-Balas, Marta
Sroka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/514725.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Śląski. Wydział Nauk Społecznych
Tematy:
corruption scandals
government accountability
volatility
Opis:
The objective of the article is to examine whether corruption scandals involving members of the ruling party lead to changes in support for the government. It will also explore the extent to which the eruption of such scandals and reporting on them leads to an increase in the number of those opposed to the government, and whether in the long run this leads to the activation of the carrot-and-stick mechanism in respect of the governing political party, reflected in increased voting instability during subsequent elections.
Źródło:
Political Preferences; 2019, 24; 45-56
2449-9064
Pojawia się w:
Political Preferences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the effectiveness of various parasitological methods in detecting nematode eggs in different types of soil
Autorzy:
Zdybel, J.M.
Sroka, J.
Karamon, J.
Bilska-Zając, E.
Wójcik-Fatla, A.
Kłapeć, T.
Skowron, P.
Siebielec, G.
Jadczyszyn, T.
Cencek, T.
Powiązania:
https://bibliotekanauki.pl/articles/28763034.pdf
Data publikacji:
2023
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2023, 30, 3; 425-431
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Liczebność, zagęszczenie i charakterystyka miejsc lęgowych sroki Pica pica w Białymstoku
Numbers, density and characteristics of nesting sites of the Magpie Pica pica in Bialystok (NE Poland)
Autorzy:
Zbyryt, A.
Banach, J.
Powiązania:
https://bibliotekanauki.pl/articles/79723.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Zoologiczne
Tematy:
ptaki
sroka
Pica pica
miejsca legowe
gniazda ptasie
lokalizacja gniazd
wybiorczosc siedliskowa
srodowisko miejskie
Bialystok
Polska Polnocno-Wschodnia
Źródło:
Ornis Polonica; 2014, 55, 2
2081-9706
Pojawia się w:
Ornis Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Liczebność, zagęszczenie i charakterystyka miejsc lęgowych sroki Pica pica w ekstensywnym krajobrazie rolniczym północno-wschodniej Polski
Number, breeding density and nest sites of the Magpie Pica pica in extensive agricultural landscape of NE Poland
Autorzy:
Zbyryt, A.
Dojlida, M.
Powiązania:
https://bibliotekanauki.pl/articles/79714.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Zoologiczne
Tematy:
ptaki
ptaki legowe
sroka
Pica pica
populacje legowe
liczebnosc populacji
zageszczenie populacji
miejsca legowe
krajobraz rolniczy
rolnictwo ekstensywne
Polska Polnocno-Wschodnia
Źródło:
Ornis Polonica; 2016, 57, 1
2081-9706
Pojawia się w:
Ornis Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prevalence of infections and co-infections with 6 pathogens in Dermacentor reticulatus ticks collected in eastern Poland
Autorzy:
Zając, Violetta
Wójcik-Fatla, Angelina
Sawczyn, Anna
Cisak, Ewa
Sroka, Jacek
Kloc, Anna
Zając, Zbigniew
Buczek, Alicja
Dutkiewicz, Jacek
Bartosik, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/989947.pdf
Data publikacji:
2017
Wydawca:
Instytut Medycyny Wsi
Tematy:
dermacentor reticulatus
co-infections
tbe virus
anaplasma phagocytophilum
rickettsia raoultii
borrelia burgdorferi sensu
lato
babesia spp.
toxoplasma gondii
Opis:
Occurrence of co-infections with various pathogens in ixodid ticks creates a risk of increased severity of tick-borne diseases in humans and animals exposed to bite of the ticks carrying multiple pathogens. Accordingly, co-infections in ticks were subject of numerous analyses, but almost exclusively with regard to Ixodes ricinus complex whereas potential tick vectors belonging to other genera were much less studied. Taking into consideration the role of Dermacentor reticulatus in the transmission of various pathogens, we carried out for the first time the comprehensive statistical analysis of co-infections occurring in this tick species. An attempt was made to determine the significance of the associations between 6 different pathogens occurring in D. reticulatus (Tick-borne encephalitis virus = TBEV, Anaplasma phagocytophilum, Rickettsia raoultii, Borrelia burgdorferi s. l., Babesia spp., Toxoplasma gondii), using 2 statistical methods: determination of Odds Ratios (ORs) and the Fisher’s exact test. 634 questing Dermacentor reticulatus ticks (370 females and 264 males) were collected in 2011–2013 by flagging the lower vegetation in 3 localities in the area of Łęczyńsko-Włodawskie Lakeland, situated in the Lublin region of eastern Poland. The presence of individual pathogens was detected by PCR. Ticks were infected most often with Rickettsia raoultii (43.8%), less with TBEV (8.5%), and much less with Babesia spp., Toxoplasma gondii, Borrelia burgdorferi s.l., and Anaplasma phagocytophilum (2.5%, 2.1%, 1.6% and 1.1%, respectively). The locality-dependent variability proved to be significant for TBEV (c2=11.063; P=0.004) and Toxoplasma gondii (c2=11.298; P=0.0035), but not for other pathogens. Two hundred seventy (42.6%) of the examined ticks were infected only with a single pathogen, and 54 (8.5%) showed the presence of dual co-infections, each with 2 pathogens. The most common were dual infections with participation of Rickettsia raoultii (7.41%); next, those with participation of the TBEV (5.21%), Toxoplasma gondii (1.58%), Borrelia burgdorferi s.l. (1.26%), Anaplasma phagocytophilum (0.95%), and Babesia spp. (0.63%). On the total number of 15 possible associations, in 9 cases co-infections occurred whereas in 6 cases they were not detected. The most noteworthy were positive co-infections with the participation of TBEV, which proved to be weakly significant (0.05
Źródło:
Annals of Agricultural and Environmental Medicine; 2017, 24, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Knowledge, protection behaviours and seroprevalence of Lyme borreliosis in inhabitants of Lublin Province, eastern Poland – evaluation of a prophylaxis programme
Autorzy:
Zając, V.
Sroka, J.
Wójcik-Fatla, A.
Powiązania:
https://bibliotekanauki.pl/articles/28763061.pdf
Data publikacji:
2023
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2023, 30, 3; 413-424
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on tick-borne rickettsiae in eastern Poland. II. Serological response of occupationally exposed populations
Autorzy:
Zajac, V.
Wojcik-Fatla, A.
Cisak, E.
Sroka, J.
Sawczyn, A.
Dutkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/51448.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Tematy:
tick
Rickettsia
Polska
serological response
occupational exposure
population
serology
ELISA test
forestry worker
agricultural worker
Opis:
A group of 150 persons living in the Lublin province of eastern Poland and occupationally exposed to tick bite were examined by the immunoenzymatic ELISA test for the presence of antibodies against tick-borne Spotted Fever Group (SFG) rickettsiae. The group consisted of 75 forestry workers employed in 3 forest inspectorates and 75 agricultural workers living in 2 villages. As a control group, 43 urban dwellers living in the city of Lublin and not occupationally exposed to tick bite were examined. Among 150 persons occupationally exposed to tick bite, the presence of antibodies against SFG rickettsiae was found in 54 (36.0% of the total). In the control group, the frequency of positive findings was only 4.7%, being significantly smaller compared to the exposed group (p=0.0001). Within the exposed group, the percentage of positive results in forestry workers (50.7%) was greater than in agricultural workers (21.3%); the difference was statistically significant (p=0.0002). Also within this group, the frequency of positive findings in males(46.5%) was significantly greater than in females (21.9%) (p=0.0029). In the exposed group, the positive results tended to increase with the age of the examined persons. However, a significant relationship between age and positive findings was found only in forestry workers (c2=14.207, p=0.00264), but not in agricultural workers and total exposed workers. The frequencies of positive results in forestry workers varied significantly depending on place of work (c2=11.271, p=0.00357). Similarly, the difference between the positive reactions in agricultural workers living in 2 villages proved to be significant (34.2% vs. 8.1%; p=0.0074). The obtained results indicate that people occupationally exposed to tick bite and living in the area of eastern Poland where over half of Dermacentor reticulatus ticks harbour SFG rickettsiae, are under significantly increased risk of infection with these rickettsiae.
Źródło:
Annals of Agricultural and Environmental Medicine; 2013, 20, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
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