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Tytuł:
Vibration Diagnostics as an effective Tool for Testing Engines of Internal Combustion
Autorzy:
Domotor, F.
Szabo, J. Z.
Powiązania:
https://bibliotekanauki.pl/articles/111686.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
engines
vibration
diagnostics
spectrum
rolling bearing
silnik
silnik spalinowy
wibrodiagnostyka
łożysko toczne
Opis:
There are several methods of automotive diagnostics used in services to detect a large variety of faults and damages of various parts of engines of internal combustion. Undoubtedly, they are effective, but they are simply unable to find all types of mechanical faults occurring during the operation. This is the reason why authors of this paper tried to use a special tool, which has been proven for years for detecting faults of rolling element bearing in rotating machinery. During their research, the authors tried to find valuable results by measuring vibration of various parts of engines. Three items were tested, a Diesel engine and two Otto motors. A large number of measurements have been taken at various speed, at different points, in different directions, with different parameter setup, etc. However, there was one setup which has been applied to all three engines. It is the measurement setup of vibration velocity, in the frequency range of 2 Hz-300 Hz. Valuable consequences have been found regarding the clogging of the air filters and the exhaust systems. As a conclusion the authors expressed their opinion, that, apart from the traditional diagnostic methods used in services, vibration measurements can also be useful, especially for detecting faults of rolling element bearings.
Źródło:
Production Engineering Archives; 2017, 16; 3-6
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Jurassic pleurotomarioidean gastropod Laevitomaria and its palaeobiogeographical history
Autorzy:
Gatto, R.
Monari, S.
Szabo, J.
Conti, M.A.
Powiązania:
https://bibliotekanauki.pl/articles/945571.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Gastropoda
Pleurotomariidae
pleurotomarioidean gastropod
gastropod
Laevitomaria
systematics
paleobiogeography
history
Jurassic
Opis:
The genus Laevitomaria is reviewed and its palaeobiogeographical history is reconstructed based on the re-examination of its type species L. problematica, the study of material stored at the National Natural History Museum of Luxembourg, and an extensive review of the literature. The systematic study allows ascribing to Laevitomaria a number of Jurassic species from the western European region formerly included in other pleurotomariid genera. The following new combinations are proposed: Laevitomaria allionta, L. amyntas, L. angulba, L. asurai, L. daityai, L. fasciata, L. gyroplata, L. isarensis, L. joannis, L. repeliniana, L. stoddarti, L. subplatyspira, and L. zonata. The genus, which was once considered as endemic of the central part of the western Tethys, shows an evolutionary and palaeogeographical history considerably more complex than previously assumed. It first appeared in the Late Sinemurian in the northern belt of the central western Tethys involved in the Neotethyan rifting, where it experienced a first radiation followed by an abrupt decline of diversity in the Toarcian. Species diversity increased again during Toarcian–Aalenian times in the southernmost part of western European shelf and a major radiation occurred during the Middle Aalenian to Early Bajocian in the northern Paris Basin and southern England. After a latest Bajocian collapse of diversity, Laevitomaria disappeared from both the central part of western Tethys and the European shelf. In the Bathonian, the genus appeared in the south-eastern margin of the Tethys where it lasted until the Oxfordian.
Źródło:
Acta Palaeontologica Polonica; 2015, 60, 1; 217-233
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Landscape and GIS - Development of the Hungarian Agri-Environment Monitoring and Information System
Autorzy:
Geczi, R.
Bodis, K.
Podmaniczky, L.
Szabo, J.
Magyari, J.
Horvath, A.
Powiązania:
https://bibliotekanauki.pl/articles/86040.pdf
Data publikacji:
2011
Wydawca:
Polska Asocjacja Ekologii Krajobrazu
Źródło:
Problemy Ekologii Krajobrazu; 2011, 30
1899-3850
Pojawia się w:
Problemy Ekologii Krajobrazu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
"Red book" of the Hungarian landscapes atlas of the threaths on the natural functioning of the 229 Hungarian microregions
Autorzy:
Csorba, P.
Szabo, J.
Bodnar, R.
Szilagyi, Z.
Szabo, G.
Szabo, S.
Novak, T.
Fazekas, I.
Powiązania:
https://bibliotekanauki.pl/articles/87960.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Geograficzne
Tematy:
indexes for landscape functioning
landscape fragmentation
natural hazards
land use change
Hungary
Opis:
For the good established landscape planning landscape protection and landscape management actions have to take into consideration the actual conditions of the landscape elements. Earlier we dealt with the stability of the landscapes (Kerényi, Csorba, 1996), recently started to investigate the most important factors, which are endangers the proper functioning of the landscapes. Results are calculated for 229 microregions of the country, which are elements of the official landscape hierarchy of Hungary described in the Cadastral of Microregions of Hungary. The average size of the microregions are 100-500 km2. There are certain factors among which some have already elaborated, and others are being worked on yet. Degree of ecological fragmentation of the microregions by roads, railway lines and settlements was determined during the last year. In the case of large settlements the extent of inner parts, traffic intensities of the roads was taken into account, while in the case of railroads it was taken into consideration whether railway lines are single or double tracked. Results were purified using a weighting, where the location of the protected natural areas compared to the situation of the given settlement, roads or railroads was taken into consideration. In the calculations it was taken into account as well that the agglomeration processes of the large settlements may restrict the ecological gates and corridors of the migration of plant and animal species. From the series of maps on natural threats on microregional level, the map of the hazards of drought is presented first. The map gives a definite answer to the question, in which microregions is profitable to establish irrigation systems; and how high is the uncertainty of the rate of their utilization. Global warming, however, may modulate the map resented here remarkably in the next decades. Microregions that have been classified into transition categories with moderate or medium level of drought hazard may fall into categories of serious hazard of drought in the future. A synthesizing map has been completed by summing the seven datasets of the indicator group of natural hazards and the weighting of the subsets. Landscape planning is strongly affected by tendencies of macro economy on the present land use structure. EU agricultural policies have just started to affect strongly on Hungarian land use structure, therefore attempts have been made in order to forecast their impacts. Present Hungarian land use structure has been compared to priorities of the EU. Prospective shifts in land use structure have been determined for the 35 regions of Hungary. According to the 8-10 factors mentioned above, we shall have a detailed database to evaluate the microregions of Hungary in order to characterize the most threatened landscapes, and the most dangerous impacts on the landscape functioning.
Źródło:
Prace Komisji Krajobrazu Kulturowego; 2008, 8; 43-60
1896-1460
2391-5293
Pojawia się w:
Prace Komisji Krajobrazu Kulturowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of soil texture determination using soil fraction data resulting from laser diffraction method
Autorzy:
Mako, A.
Szabo, B.
Rajkai, K.
Szabo, J.
Bakacsi, Z.
Labancz, V.
Hernadi, H.
Barna, G.
Powiązania:
https://bibliotekanauki.pl/articles/2082643.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
laser diffraction
particle-size distribution
pedotransfer function
soil texture triangle
Opis:
There are global aspirations to harmonize soil particle- size distribution data measured by the laser diffraction method and by traditional sedimentation techniques, e.g. sieve-pipette methods. The need has arisen therefore to build up a database, containing particle-size distribution values measured by the sieving and pipette method according to the Hungarian standard (sieve-pipette methods-MSZ) and the laser diffraction method according to a widespread and widely used procedure. In our current publication, 155 soil samples measured with sieve-pipette methods-MSZ and laser diffraction method (Malvern Mastersizer 2000, HydroG dispersion unit) were compared. Through the application of the usual size limits at the laser diffraction method, the clay fraction was under- and the silt fraction was overestimated compared to the sieve-pipette methods-MSZ results, and subsequently the soil texture classes were determined according to the results of both methods also differed significantly from each other. Based on our previous experience, the extension of the upper size limit of the clay fraction from 2 to 7 μm increases the comparability of sievepipette methods-MSZ and laser diffraction method, in this way the texture classes derived from the particle-size distributions were also more in accordance with each other. The difference between the results of the two kinds of particle-size distribution measurement methods could be further reduced with the pedotransfer functions presented.
Źródło:
International Agrophysics; 2019, 33, 4; 445-454
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acute SARS-CoV-2 infection and seropositivity among healthcare workers and medical students in summer 2020, Hungary
Autorzy:
Kosztin, Annamária
Merkely, Béla
Szabó, Attila J.
Blaha, Béla
Varga, Péter
Vásárhelyi, Barna
Vokó, Zoltán
Powiązania:
https://bibliotekanauki.pl/articles/2084806.pdf
Data publikacji:
2022-04-11
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
polymerase chain reaction
medical students
seropositivity
COVID-19
SARS-CoV-2
healthcare workers
Opis:
ObjectivesThe aim was to compare the prevalence of acute infection and seropositivity of SARS-CoV-2 among healthcare workers (HCWs) and medical students.Material and MethodsA high-volume, single-center analysis was conducted in the period of July 1‒August 1, 2020, at the Semmelweis University. Naso- and oropharyngeal samples were collected for polymerase chain reaction (PCR), and blood samples for anti-SARS-CoV-2 IgG. A questionnaire was also administered about the infection symptoms and the obtained results were assessed by profession and site of care delivery.ResultsFrom the total cohort (N = 7948), 4478 (56%) and 3470 (44%) were health professionals and medical students, respectively. They were mainly female (67%), and the mean age of HCWs and students was 40 and 25 years, respectively. By profession, physicians (1.5%) and other HCWs (1.8%) showed a comparable SARS-CoV-2 exposure. International students had the highest (2.1%), whereas Hungarian students had the lowest (0.6%) prevalence of seropositivity. The highest prevalence was detected among the staff of COVID-19 wards (12.1%). By PCR, medical students showed the lowest occurrence of active infection with a prevalence of 0.17%, while physicians and other HCWs had a higher prevalence (1.46% and 1.71%, respectively). By site of care delivery, positive test results were the most frequent at COVID-19 wards (3.8%).ConclusionsPhysicians and other HCWs showed comparable SARS-CoV-2 seropositivity prevalence, approximately twice as high as in the general population of Budapest. Hungarian students had lower prevalence of seropositivity than this reference. High prevalence among international students suggests that they had imported the infection. The very high prevalence of documented exposure among staff members at COVID-19 wards urges for improving the safety measures.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2022, 35, 2; 209-216
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
LPV design of fault-tolerant control for road vehicles
Autorzy:
Gáspár, P.
Szabó, Z.
Bokor, J.
Powiązania:
https://bibliotekanauki.pl/articles/331462.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
sterowanie odporne
detekcja uszkodzeń
sterowanie tolerujące uszkodzenia
sterowanie pojazdem
robust control
fault detection
LPV systems
fault tolerant control
vehicle dynamics
vehicle control
Opis:
The aim of the paper is to present a supervisory decentralized architecture for the design and development of reconfigurable and fault-tolerant control systems in road vehicles. The performance specifications are guaranteed by local controllers, while the coordination of these components is provided by a supervisor. Since the monitoring components and FDI filters provide the supervisor with information about the various vehicle maneuvers and the different fault operations, it is able to make decisions about necessary interventions into the vehicle motions and guarantee reconfigurable and fault-tolerant operation of the vehicle. The design of the proposed reconfigurable and fault-tolerant control is based on an LPV method that uses monitored scheduling variables during the operation of the vehicle.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2012, 22, 1; 173-182
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Introduction and spreading of IPM and integrated apple production in Hungary
Wprowadzanie i rozwój zintegrowanych metod ochrony przed szkodnikami oraz integrowanej produkcji jabłek na Węgrzech
Autorzy:
Lehota, J.
Szabo, Z.
Lehota, Z.
Powiązania:
https://bibliotekanauki.pl/articles/868672.pdf
Data publikacji:
2010
Wydawca:
The Polish Association of Agricultural and Agribusiness Economists
Opis:
No accurate statistics are available concerning the amounts and value of the crop protection chemicals used in fruit production in Hungary. The quantity of chemicals used dropped dramatically between 1990 and 2001, to 2.1 kg/ha. One important consideration from the aspect of evaluating the decrease in the quantities of chemicals used is that the crop protection technology and the range of the chemicals used changed significantly during the period concerned. The research project took place in the framework of the No. 6 Network of Excellence frame programme and the European Network for Durable Exploitation of Crop Protection Strategies programme (No. 3.5 sub-programme: Societal Assessment of Current and Novel Low Input Crop Protection Strategies), between 2007 and 2010. Possibilities of integrated crop protection and integrated production in apple production were studied in the framework of the sub-programme with the involvement of six countries (Switzerland, France, the Netherlands, the United Kingdom, Hungary and Poland). Five main elements affecting the spreading of integrated production were studied in the framework of the sub-programme public politics, research and consultancy (advisory) services, farmers. cooperation, the development of marketing strategies and the role and impacts of civil society organisations. The Marketing Institute studied the impacts of the development of marketing strategies and those of retail chains playing a dominant role in the supply chain.
W artykule dokonano analizy wpływu integrowanych metod produkcji na stretegie merketingowe sieci detallicznych na Węgrzech.
Źródło:
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu; 2010, 12, 6
1508-3535
2450-7296
Pojawia się w:
Roczniki Naukowe Stowarzyszenia Ekonomistów Rolnictwa i Agrobiznesu
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermopower Monitoring of Relaxation and Devitrification in Fe-Based Glassy Alloys
Autorzy:
Lovas, A.
Kravcak, J.
Szabó, A.
Powiązania:
https://bibliotekanauki.pl/articles/1200307.pdf
Data publikacji:
2014-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.43.Dq
72.15.Jf
Opis:
The change of thermopower is investigated in Fe-based glassy alloys during structural relaxation and amorphous-crystalline transformation. It was found, that thermopower shifts to negative direction until solely the relaxation proceeds. This negative shift is composition independent. The net shape of thermopower curves is composed from the thermopower of the individual constituent crystalline phases after the crystallization process.
Źródło:
Acta Physica Polonica A; 2014, 126, 1; 78-79
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stimulation of unconventional hydrocarbon reservoirs
Autorzy:
Szabo, D.
Pinka, J.
Stolićny, E.
Powiązania:
https://bibliotekanauki.pl/articles/299289.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Tight gas sand
shale gas
coal bed seam unconventional
intensification
fracturing
propant
mesh
Darcy’s law
Opis:
In the "new age" oil and gas industry came more and more into focus term of unconventional hydrocarbons. Gained experience and success in the United States tight gas sand reservoirs Piceance, Anadarko, Greater Green, Lobo fields confirmed the hidden potential of unconventional hydrocarbon resources. In some production and development areas called coal bed seam, shale gas and tight sand reservoirs without intensifying operations isn't possible to produce commercial gas volumes. Used practises and gained large experiences in the crude oil fields are commonly used in the shale and tight gas fields across the United States. Application of these technologies of stimulation methods like fracturing in Europe is at the very beginning. Pioneer investors are waiting in all Europe for the well testing results from the first dozen fractured shale gas and tight sand reservoirs. Test results could have significant influence on the future planned massive drilling campaign of exploration of the unconventional hydrocarbon resources
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 2; 307-313
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
UGS wells in depleted fields
Podziemne magazyny gazu zlokalizowane na sczerpanych złożach węglowodorów
Autorzy:
Szabo, D.
Pinka, J.
Fedorko, L.
Powiązania:
https://bibliotekanauki.pl/articles/299404.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
podziemne magazyny gazu
Underground Gas Storage (UGS)
logging
Open Hole
closed loop system
sand control
Opis:
The Underground Gas Storage (UGS) facilities are mainly built in hydrocarbon reservoirs (depleted oil and gas fields), in aquifers and also in salt caverns using proven techniques based on the best use of geology and geophysics. From the international perspective, Slovakia plays an important role in the European gas industry. Transporting one-fifth of the natural gas consumed in western European countries, it is one of the largest natural gas transit countries. Before the end of its path across Slovakia, the transported natural gas reaches the Lab UGS facility in the Slovakia. This paper describes oil and gas depleted reservoirs and techniques that apply in the UGS field.
Podziemne magazyny gazu (PMG) lokalizowane są głównie na sczerpanych złożach węglowodorów lub w kawernach solnych z wykorzystaniem sprawdzonych technik bazujących na osiągnięciach geologii i geofizyki. W niniejszej pracy opisano czerpane złoża ropy naftowej i gazu ziemnego oraz techniki stosowane w PMG na Słowacji.
Źródło:
Wiertnictwo, Nafta, Gaz; 2011, 28, 1-2; 411-417
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Teleinformatyka w edukacji inżynierii awiacji
Autorzy:
Pila, J.
Szabo, S.
Pila, M.
Powiązania:
https://bibliotekanauki.pl/articles/196375.pdf
Data publikacji:
2011
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
teleinformatyka
transport lotniczy
teleinformatics
air transport
Opis:
The passenger and aircraft crew safety is the major requirement of the aircraft operation. Its continuous enhancement is the major task not only for design bureaus, aircraft manufacturers, services, but is also the subject of training and educational activities as well. Presented article focuses on analysis of needs and methods application, regarding risk mitigation in aircraft operation, considering aviation engineering training and education in compliance with EASA (European Aviation Safety Agency) Module 12, Part 66 - titled as “Helicopter aerodynamics, structure and systems”. Topicality of the contribution results from necessity of implementation educational technology into university education as well as individual preparation of aircraft maintenance staff. The contribution has two parts – paper and multimedia form. Paper form is analysis of the connection among safety, education and ergatic system (machine-man-environment). Multimedia form consists of Module 12 with its text, figures, videos, photos and interactive tests.
Bezpieczeństwo pasażera oraz personelu kabinowego jest głównym wymaganiem w obsłudze statku powietrznego. Ciągłe zwiększanie bezpieczeństwa jest nie tylko zadaniem biur projektowych, producentów samolotów, sektora usługowego ale również przedmiotem szkoleń i edukacji. Poniższy artykuł koncentruje się na analizie potrzeb i metod związanych ze zmniejszaniem ryzyka w obsłudze statku powietrznego, szkoleń dotyczących inżynierii awiacji oraz edukacji w ramach EASA (European Aviation Safety Agency) Module 12, Part 66 - titled as “Helicopter aerodynamics, structure and systems” – moduł 12, część 66 zatytułowana „ Aerodynamika, struktura i systemy helikoptera”. Tematyka tej pracy wynika z potrzeby wdrożenia technologii edukacyjnej do programu edukacyjnego uniwersytetów, a także indywidualnego przygotowania służb utrzymania danego statku powietrznego. Praca składa się z dwóch części – papierowej i multimedialnej. Część papierowa stanowi analizę powiązań pomiędzy bezpieczeństwem, edukacją oraz systemem maszyna-człowiek-środowisko. Część multimedialna składa się z Modułu 12 z tekstem, danymi liczbowymi, video, zdjęciami oraz testami interaktywnymi.
Źródło:
Zeszyty Naukowe. Transport / Politechnika Śląska; 2011, 70; 77-84
0209-3324
2450-1549
Pojawia się w:
Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Supervisory fault tolerant control of the GTM UAV using LPV methods
Autorzy:
Péni, T.
Vanek, B.
Szabó, Z.
Bokor, J.
Powiązania:
https://bibliotekanauki.pl/articles/330070.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault tolerant control
linear parameter varying systems
supervisory architecture
flight control
sterowanie tolerujące uszkodzenia
układ liniowy niestacjonarny
sterowanie lotem
Opis:
A multi-level reconfiguration framework is proposed for fault tolerant control of over-actuated aerial vehicles, where the levels indicate how much authority is given to the reconfiguration task. On the lowest, first level the fault is accommodated by modifying only the actuator/sensor configuration, so the fault remains hidden from the baseline controller. A dynamic reallocation scheme is applied on this level. The allocation mechanism exploits the actuator/sensor redundancy available on the aircraft. When the fault cannot be managed at the actuator/sensor level, the reconfiguration process has access to the baseline controller. Based on the LPV control framework, this is done by introducing fault-specific scheduling parameters. The baseline controller is designed to provide an acceptable performance level along all fault scenarios coded in these scheduling variables. The decision on which reconfiguration level has to be initiated in response to a fault is determined by a supervisor unit. The method is demonstrated on a full six-degrees-of-freedom nonlinear simulation model of the GTM UAV.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 117-131
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Input reconstruction by means of system inversion: A geometric approach to fault detection and isolation in nonlinear systems
Autorzy:
Edelmayer, A.
Bokor, J.
Szabo, Z.
Szigeti, F.
Powiązania:
https://bibliotekanauki.pl/articles/907385.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
detekcja uszkodzeń
lokalizacja uszkodzeń
układ liniowy
układ nieliniowy
inwersja systemu
fault detection
fault isolation
input reconstruction
linear system
nonlinear system
system inversion
Opis:
In this paper the classical detection filter design problem is considered as an input reconstruction problem. Input reconstruction is viewed as a dynamic inversion problem. This approach is based on the existence of the left inverse and arrives at detector architectures whose outputs are the fault signals while the inputs are the measured system inputs and outputs and possibly their time derivatives. The paper gives a brief summary of the properties and existence of the inverse for linear and nonlinear multivariable systems. A view of the inversion-based input reconstruction with special emphasis on the aspects of fault detection and isolation by using invariant subspaces and the results of classical geometrical systems theory is provided. The applicability of the idea to fault reconstruction is demonstrated through examples.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2004, 14, 2; 189-199
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strong-Coupling Features in $YB_6$ and $ZrB_{12}$ Studied by Point-Contact Spectroscopy
Autorzy:
Girovský, J.
Szabó, P.
Mori, T.
Samuely, P.
Powiązania:
https://bibliotekanauki.pl/articles/1535414.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.50.+r
74.70.Ad
74.62.Dh
Opis:
Point-contact spectroscopy studies of the superconducting energy gap and the electron-phonon coupling mechanism are performed on the boron rich $YB_6$ and $ZrB_{12}$ single crystals. The obtained values of the superconducting energy gaps suggest the strong coupling with 2 Δ/$k_{B}T_{c}$≈ 4.2 for $YB_6$ and 2 Δ/$k_{B}T_{c}$≈ 4.15 for $ZrB_{12}$. We have observed the dominant soft phonon modes mediating superconductivity in the both samples at energy ≈ 8 meV for $YB_6$ and ≈ 11 meV in $ZrB_{12}$, respectively.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 1042-1044
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 29

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