Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "S. Z. O." wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-73 z 73
    Tytuł:
    Kwestionariusz oczekiwań doradczych – empiryczna weryfikacja koncepcji Bożeny Wojtasik
    The Counselling Expectations Questionnaire – an empirical verification of Bożena Wojtasiks concept
    Autorzy:
    P a s z k o w s k a - R o g a c z, Anna
    Powiązania:
    https://bibliotekanauki.pl/articles/464274.pdf
    Data publikacji:
    2010
    Wydawca:
    Akademickie Towarzystwo Andragogiczne
    Tematy:
    doradztwo zawodowe
    oczekiwania
    kwestionariusz.
    career counselling
    expectations
    questionnaire
    Opis:
    Artykuł prezentuje proces tworzenia narzędzia do badania oczekiwań doradczych zbudowany na podstawie koncepcji stylów poradnictwa opracowanej przez Bożenę Wojtasik (1997). Badanie pilotażowe przeprowadzono z udziałem 268 uczniów szkół średnich (techników i liceów), w tym 169 chłopców i 99 dziewcząt w wieku od 17 do 20 lat. Analiza psychometryczna narzędzia nie potwierdziła istnienia skal teoretycznych, określonych kategoriami takimi, jak ekspert, informator, leseferysta, konsultant i spolegliwy opiekun oraz wyłoniła dwie nowe kategorie – „Doradca humanistyczny” (10 pozycji, alfa Cronbacha = 0,834) i „Doradca racjonalny” (10 pozycji, alfa Cronbacha = 0,741). Do weryfikacji trafności zewnętrznej testu zastosowano dwa testy osobowości: Kwestionariusz NEO-FFI Costy i McCrae oraz Test Przymiotnikowy ACL Gougha i Heilbruna. Sprawdzono również, że jest on także metodą stabilną w czasie. Opracowano ostateczną wersję kwestionariusza wraz z normalizacją.
    The article presents the process of creating a tool for research of counselling expectations based on the concept of counselling styles elaborated by Bożena Wojtasik (1997). The pilot study was done with the help of 268 high school students [technical and liceum (comprehensive)] comprised of 169 boys and 99 girls aged between of 17 – 20. A psychometric analysis of this tool has not confirmed the existence of theoretical scales relating to categories such as expert, informant, laissez-faire, consultant, submissive guardian, but has lead to two new categories – "humanist counsellor" (10positions, Cronbach's alfa = 0,834) and "rational counsellor" (10positions, Cronbach's alfa = 0,741). To verify the adequacy of an external test, two personality tests were used: the NEO-FFI questionnaire by Costy and McCrae and Guough's and Heilbrun's ACL Adjective test. It has also been verified whether the method described is stable over time. A final version of the questionnaire has been prepared along with a normalisation.
    Źródło:
    Edukacja Dorosłych; 2010, 1(62); 125-141
    1230-929X
    Pojawia się w:
    Edukacja Dorosłych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Test particle modelling of ion collisional transport in tokamaks
    Autorzy:
    Kononenko, Z. S.
    Kazakov, Y. O.
    Powiązania:
    https://bibliotekanauki.pl/articles/147708.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    diffusion coefficient
    impurity transport
    magnetic islands
    Monte Carlo collision operator
    resonant magnetic perturbation (RMP)
    test particle code
    Opis:
    A numerical method is presented for evaluation of the radial diffusion coefficient, based on the full orbit modelling of particle orbits in the tokamak geometry. The code solves the full orbit equations of motion for a set of test particles in an arbitrary equilibrium magnetic field. The effect of Coulomb collisions of test ions with background plasma particles is simulated by means of an equivalent Monte Carlo collision operator which scatters the pitch angle as well as the gyrophase of the particle. The radial diffusion coefficient is estimated by calculating the temporal dependence of the mean-square displacement of an ensemble of monoenergetic test particles. As an illustration of the method the effect of magnetic islands on the impurity collisional transport is studied. It is shown that in presence of m = 2, n = 1 resonant magnetic perturbation (RMP) the diffusion coefficient for the tungsten ions (W28+, E = 1 keV) can increase by a factor of 5-10.
    Źródło:
    Nukleonika; 2012, 57, 1; 43-47
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnoskopowe badanie sieci CAN
    Diagnoscops testing CAN network
    Autorzy:
    Duer, S.
    Zajkowski, K.
    Palkova, Z.
    Lukac, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/316957.pdf
    Data publikacji:
    2016
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    diagnostyka
    magistrala CAN
    CAN
    przesył informacji
    sterownik silnika
    motor controller
    working maps
    states the engine
    algorithm of engine
    Opis:
    W artykule zaprezentowano opis diagnostycznego sposobu badania sieci informacyjnej CAN B pojazdu samochodowego z wykorzystaniem specjalistycznego diagnoskopu Wurth WOW. Przesyłanie wszystkich informacji w pojeździe, a więc sygnałów informacyjnych, czy też sygnałów sterujących (nastawczych) jest realizowane z wykorzystaniem wewnętrznej sieci informacyjnej. Stan techniczny tej sieci a w szczególności jej sprawność bezpośrednio wpływają na właściwą pracę wszystkich systemów w pojeździe, informacyjnych (diagnostycznych), czy też systemów sterujących pracą silnika pojazdu oraz jego systemów bezpieczeństwa.
    The article presents a descripti on of the method of diagnostic information network CAN-B vehicle with the use of specialized diagnoscope Wurth WOW. Transferring all the information on the vehicle, and hence information signals or control signals (setting) is performed using an internal network. The technical condition of the network and in particular its efficiency directly affect the proper operation of all systems in the vehicle, information (diagnostic), or are systems, engine control of the vehicle and its safety systems.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2016, 17, 8; 78-81
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influences of biocomponents (RME) on regenerations of diesel particle filters
    Autorzy:
    Czerwinski, J.
    Stepien, Z.
    Oleksiak, S.
    Andersen, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/247285.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    diesel particle filter
    regeneration of DPF
    biofuels
    non-legislated emissions
    nanoparticles
    Opis:
    The fatty acid methyl esters (FAME's) - in Europe mostly RME *) (Rapeseed methyl ester; Abbreviations see at the end of this paper) - are used in several countries as alternative biogenic Diesel fuels in various blending ratios with fossil fuels (Bxx). Questions arise often about the influences of these biocomponents on the modern exhaust after-treatment systems and especially on the regeneration of Diesel particle filters (DPF). In the present work different regeneration procedures of DPF systems were investigated with biofuels B0, B20 & B100. The tested regeneration procedures were: - passive regenerations: DOC + CSF; CSF alone, - active regenerations: standstill burner; fuel injections & DOC. During each regeneration on-line measurements of limited and unlimited emission components (nanoparticles & FTIR) was conducted. It can be stated that the increased portion of RME in fuel provokes longer time periods to charge the filter with soot. This is due to the lower PM-emissions of the engine, as well as to the higher reactivity and higher SOF-portion of the particle mass from RME. With the passive regeneration system with stronger catalytic activity (DOC + CSF) there is a stronger NO2-production with B100 and due to the NO2-supported oxidation of PM the balance point temperature is approx. 20 centigrade lower, than with B0. For the active regenerations the time courses of emissions and temperatures are closely connected with the chosen regeneration strategy - switching, timing and intensity (of burner, or fuel aerosol generator). A higher portion of biocomponent causes usually a stronger break-down of the instantaneous DPF filtration efficiency during the regeneration procedure - this is an effect of stronger artifact of spontaneous condensation after DPF. In summary there is no negative short term effect of bio-blended-fuels on the investigated regeneration procedures. Some recommendations for a successful long term operation, basing on other works and literature are given at the end of the paper.
    Źródło:
    Journal of KONES; 2011, 18, 4; 65-75
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie przepływomierza powietrza na podstawie informacji z sieci CAN
    Examination of the air flow meter based on information from the CAN network
    Autorzy:
    Duer, S.
    Zajkowski, K.
    Palkova, Z.
    Lukac, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/309749.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Naukowo-Wydawniczy "SPATIUM"
    Tematy:
    czujniki silnika
    sterowanie silnika
    mapy robocze silnika
    diagnostyka pojazdów
    engine sensors
    engine control
    engine working maps
    vehicle diagnostics
    Opis:
    W artykule zaprezentowano problematykę badania sprawności przepływomierza powietrza i jego wpływ na jakość spalin. Przedstawiono w nim także funkcje i miejsce tego urządzenia w systemie sterowania pracą silnika. Przedstawiono także, że sygnał z tego czujnika jest informacją podstawową dla sterownika w procesie wypracowania dawki paliwa). Badanie przepływomierzy powietrza wykonano na podstawie badania z wykorzystaniem informacji z sieci CAN.
    The article presents the problems of the air flow meter performance testing and its impact on the quality of exhaust gases. It also presents the features and place this device in the engine control system. Also it shows that the signal from the sensor is basic information for the river in the process of developing fuel delivery. The study of air flow were based on research using information from the CAN network.
    Źródło:
    Autobusy : technika, eksploatacja, systemy transportowe; 2015, 16, 6; 77-80
    1509-5878
    2450-7725
    Pojawia się w:
    Autobusy : technika, eksploatacja, systemy transportowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of reliable concentrations of pollutants in raw wastewater based on different sampling methods
    Wyznaczanie miarodajnych stężeń zanieczyszczeń w ściekach surowych w oparciu o różne metody poboru próbek
    Autorzy:
    Myszograj, S.
    Sadecka, Z.
    Qteishat, O.
    Suchowska-Kisielewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/396193.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sampling methods
    raw sewage
    wastewater treatment plant
    metody poboru próbek
    ścieki
    analiza ścieków
    oczyszczalnia ścieków
    Opis:
    The aim of this study was to check the extent to which the sampling method and the volume of sewage (size of the wastewater treatment plant) influence the determined daily average concentrations of pollution components. Within three days of dry weather, the composition of two raw sewage wastewater treatment plants was continuously monitored. The WWTPs were designed for the flow of 820 m3d and 51000 m3d, respectively. The concentrations of pollutants were measured in samples taken both in time-proportional and flow-proportional ways. The obtained values show the possibility of taking the samples mixed at equal time intervals and in proportion to the flow as reliable sources for design values of concentrations. The size of WWTP, i.e. the amount of investigated raw sewage, was of no significant importance to the obtained results regarding concentrations of pollutants.
    Nowelizacja i dostosowywanie przepisów prawnych do wymagań UE wymusza na eksploatatorach oczyszczalni ścieków wykonywanie precyzyjnych pomiarów ilości i analiz składu fizyko-chemicznego ścieków. Postęp techniczny oraz bogata oferta producentów urządzeń umożliwia sprostanie tym wymaganiom. Jednak o przydatności wyników pomiarowych do projektowania oczyszczalni ścieków obok dokładności urządzeń pomiarowych decyduje fakt, czy próbkę ścieków można uznać za próbkę reprezentatywną. Często pomimo najnowocześniejszych urządzeń i wykwalifikowanego personelu wyniki badań nie mogą być traktowane wiarygodnie. W artykule na podstawie pomiarów ilości i analiz składu ścieków surowych zweryfikowano w jakim stopniu metoda poboru próbek oraz ilość dopływających ścieków (wielkość oczyszczalni ścieków) wpływa na wartość wyznaczonych średniodobowych stężeń wskaźników zanieczyszczeń. W ciągu trzech dób w pogodzie suchej przeprowadzono ciągły monitoring składu ścieków surowych w oczyszczalniach zaprojektowanych na przepływ 820 m3d (OŚ1) i 51000 m3d (OŚ2). W próbkach zbieranych czasowo-proporcjonalnie i przepływowo-proporcjonalnie wyznaczono stężenia miarodajne wskaźników zanieczyszczeń. Uzyskane wartości wskazują na możliwości przyjmowania do projektowania stężeń miarodajnych wyznaczonych w próbkach zlewanych w jednakowych interwałach czasowych, jak i proporcjonalnie do przepływu. Nie stwierdzono również istotnego wpływu wielkości oczyszczalni, a tym samym nierównomierności dopływu ścieków surowych na obliczone wartości stężeń wskaźników zanieczyszczeń.
    Źródło:
    Civil and Environmental Engineering Reports; 2013, 10; 99-107
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some bioactive properties of Acacia dealbata extracts and their potential utilization in wood protection
    Autorzy:
    Yildiz, S.
    Gurgen, A.
    Can, Z.
    Tabbouche, S.A.
    Kilic, A.O.
    Powiązania:
    https://bibliotekanauki.pl/articles/52367.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
    Źródło:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2018, 61, 202
    1644-3985
    Pojawia się w:
    Drewno. Prace Naukowe. Doniesienia. Komunikaty
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of the maxilla bone tissue regeneration when porous glass-ceramic material «Byossital» applied in complex with acupuncture : experimental case
    Autorzy:
    Pohodenko-Chudakova, I. O.
    Barmytzkaya, A.Z.
    Chudakov, O.P.
    Bezzubik, S.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/285732.pdf
    Data publikacji:
    2010
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    maxillofacial surgery
    glass-ceramic materials
    bone tissue
    Źródło:
    Engineering of Biomaterials; 2010, 13, no. 99-101; 3-4
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A New Short Signature Scheme with Random Oracle from Bilinear Pairings
    Autorzy:
    Akleylek, S.
    Kirlar, B. B.
    Sever, Ö
    Yüce, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/309497.pdf
    Data publikacji:
    2011
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    bilinear Diffie-Hellman problem
    bilinear pairings
    ring signature
    short signatur
    Opis:
    In this paper, we propose a new and efficient short signature scheme from the bilinear pairings. Our scheme is constructed by bilinear inverse-square Diffie-Hellman problem (BISDHP) and does not require any special hash function. The exact security proofs are also explained in the random Oracle model. We give the implementation and comparison results of our proposed signature scheme with the signature scheme proposed by Boneh, Lynn, Shacham (BLS) and Zhang, Safavi, Susilo (ZSS). Furthermore, we use this signature scheme to construct a ring signature scheme.
    Źródło:
    Journal of Telecommunications and Information Technology; 2011, 1; 5-10
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Construction of conical axoids on the basis of congruent spherical ellipses
    Autorzy:
    Kresan, T.
    Pylypaka, S.
    Ruzhylo, Z.
    Rogovskii, I.
    Trokhaniak, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2201118.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    spherical ellipse
    conical axoid
    angle of rotation dependence
    bevel gear
    elipsa sferyczna
    aksoida stożkowa
    zależność kąta obrotu
    przekładnia zębata stożkowa
    Opis:
    Purpose: To carry out the transition from a cylindrical gear in which the centroids are congruent ellipses with centres of rotation in the foci, to a bevel gear on the basic of congruent spherical ellipses. Design/methodology/approach: Congruent ellipses with centres of rotation in the foci serve as centroids for the design of cylindrical gears with non-circular wheels. The article analytically shows that the analogues of ellipses on the plane - congruent spherical ellipses are the basis for the construction of the axoids of the corresponding bevel gears. An analogue of the centre-to-centre distance for ellipses in the plane is the angle between the axes of rotation of conical axoids. Findings: Based on the equality of the arcs of ellipses, the dependence of the angle of rotation of one axoid on the angle of rotation of another is found. Graphs of this dependence for separate cases are given. It is shown under what conditions the axes of axoids intersect at right angle. The parametric equations of spherical ellipses and corresponding axoids are given. They were used to construct spherical ellipses and corresponding conical axoids for different cases. For gears with right angle between the axes, separate positions of the axoids with different angles of their rotation around their axes are constructed. Practical implications: Spherical ellipses are directing curves for the construction of the corresponding conical axoids. Originality/value: The paper shows that congruent spherical ellipses act as centroids for the design of axoids of bevel gears. They roll one by one without sliding, rotating around axes that intersect in the centre of the sphere. To design such gears, it is important to know the interdependence between the geometric parameters, especially for common gears with a right angle between the axes.
    Źródło:
    Archives of Materials Science and Engineering; 2022, 113, 1; 13--18
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling of Electron Kinetics in $BF_{3}$
    Autorzy:
    Nikitović, Ž.
    Šašić, O.
    Raspopović, Z.
    Stojanović, V.
    Radovanov, S.
    Mozetič, M.
    Cvelbar, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1537846.pdf
    Data publikacji:
    2010-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    51.10.+y
    52.20.Fs
    52.65.Pp
    Opis:
    In this paper we used the available data for the electron impact scattering cross sections $BF_{3}$ to calculate the transport coefficients for electrons. Monte Carlo simulation was used to perform calculations of the transport coefficients as well as the rate coefficients in DC electric fields, crossed electric and magnetic DC and RF fields.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 5; 748-751
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possibilities of reuse of treated wastewater for irrigation purposes in the Northern Jordan Valley
    Autorzy:
    Myszograj, S.
    Qteishat, O.
    Sadecka, Z.
    Jędrczak, A.
    Suchowska-Kisielewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/207413.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    wastewater reclamation
    irrigation
    wastewater treatment
    water quality
    fresh water
    rekultywacja ścieków
    nawadnianie
    oczyszczanie ścieków
    jakość wody
    woda świeża
    Opis:
    The possibilities of treated wastewater (TWW) reuse for irrigation purposes in the Northern Jordan Valley have been described. As shown by the analysis of the data, the results indicate a wide non-compliance with the Jordanian Standard 983/2006. Most problematic parameters are BOD, COD, nitrogen content, TSS. TWW will be blended with fresh water prior to use in agriculture. The blended water quality was reviewed after mixing of fresh water with the existing TWW without plant improvements. In general if there are no WWTP upgrades, the blended water quality satisfies the requirements of the Jordanian Water Quality Guidelines.
    Źródło:
    Environment Protection Engineering; 2014, 40, 2; 17-31
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pollen morphology in the tribe Nigelleae (Ranunculaceae): a worldwide palynological investigation into the species
    Autorzy:
    Isik, S.
    Donmez, E.O.
    Aydin, Z.U.
    Donmez, A.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2117898.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Garidella
    Komaroffia
    multivariate analysis
    Nigella
    Ranunculaceae
    pollen morphology
    Opis:
    The pollen morphology of many collections of taxa of the tribe Nigelleae from the family Ranunculaceae which occur worldwide is presented in this study. A total of 88 specimens from 21 taxa, some of which were recently proposed, belonging to the genera Komaroffia, Garidella, and Nigella of Nigelleae were examined using light microscopy (LM) and scanning electron microscopy (SEM). In the tribe, the pollen type is mostly trizonocolpate, but in many taxa and specimens, both trizonocolpate and non-trizonocolpate types occur together. The pollen grains are small to medium (25–53.75 μm × 20–55 μm) in size and oblate to prolate in shape. The exine pattern at the mesocolpium in all the taxa investigated is similar: micro-echinate in LM and micro-echinate-punctate in SEM. The colpus membrane in Komaroffia and Nigella is micro-echinate in both LM and SEM. In Garidella, it is micro-echinate in LM but echinate (spinulose) in SEM. In this study, multivariate analyses, principal component analysis (PCA), and unweighted pair group method with arithmetic mean (UPGMA), were used to evaluate relationships between the genera and species within the tribe with respect to pollen morphology. PCA results show three main groups in the tribe: Garidella, Komaroffia, and Nigella. Moreover, the UPGMA tree also chiefly supports generic segregation into the smaller genera. An overall synthesis of the pollen characteristics of the three genera is provided and discussed.
    Źródło:
    Acta Biologica Cracoviensia. Series Botanica; 2019, 61, 1; 93-102
    0001-5296
    Pojawia się w:
    Acta Biologica Cracoviensia. Series Botanica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nature value habitat conditions and fodder value of selected associations in semi-natural moist meadows in the Noteć Bystra river valley
    Waloryzacja przyrodnicza, warunki siedliskowe oraz wartość użytkowa wybranych zespołów roślinnych seminaturalnych łąk wilgotnych w dolinie Noteci Bystrej
    Autorzy:
    Murawski, M.
    Grzelak, M.
    Kaczmarek, Z.
    Gajewski, P.
    Runowski, S.
    Tylman, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/334679.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    nature value
    habitat conditions
    fodder value
    semi-natural moist meadows
    biodiversity
    Noteć valley
    Noteć Bystra
    waloryzacja przyrodnicza
    warunki siedliskowe
    wartość użytkowa
    półnaturalne łąki wilgotne
    bioróżnorodność
    dolina Noteci
    Opis:
    Floristic studies were conducted in two vegetation seasons, in 2013 and 2014. The object of analyses comprised selected phytocenoses of grass and tall sedge rushes classified to the class Phragmitetea, found in semi-natural meadows in the Noteć Bystra river valley. The selected plant associations are located at the town of Radolin, the Wielkopolskie province, the CzarnkówTrzcianka county, the Trzcianka commune. A total of 40 relevés for well-developed phytocenoses were prepared applying the 7-point scale according to Braun-Blanquet. As a result seven plant associations from two alliances (Phragmition and Magnocaricion) from the class Phragmitetea were identified. The recorded plant associations were characterised by considerable floristic diversity - 112 taxa belonging to 33 botanical families were identified, with the family Poaceae represented by the greatest number of species and found most commonly.
    Badania florystyczne przeprowadzono w dwóch sezonach wegetacyjnych, w 2013 i 2014 roku. Obiekt badań stanowiły wybrane fitocenozy szuwarów trawiastych i wielkoturzycowych zaliczanych do klasy Phragmitetea, występujące na półnaturalnych łąkach usytuowanych w Dolinie Noteci Bystrej. Wybrane zespoły roślinne zlokalizowane są w miejscowości Radolin w województwie wielkopolskim - powiat czarnkowsko-trzcianecki, gmina Trzcianka. Stosując siedmiostopniową skalę metody Braun- Blanqueta wykonano 40 zdjęć fitosocjologicznych dobrze wykształconych płatów roślinności. Umożliwiło to wyróżnienie siedmiu zespołów roślinnych wchodzących w skład dwóch związków (Phragmition i Magnocaricion) z klasy Phragmitetea. Wyróżnione asocjacje roślinne cechowały się znaczną różnorodnością florystyczną. Sklasyfikowano 112 taksonów należących do 33 rodzin botanicznych, wśród których najliczniejszą w gatunki, a także najczęściej reprezentowaną była rodzina wiechlinowatych.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2018, 63, 2; 166-169
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geobotanical conditions of habitats occupied by Phalaria arundinaceae caricetosum gracilis community in the middle Warta valley (Central Poland)
    Warunki geobotaniczne siedlisk zajmowanych przez zbiorowisko Phalaria arundinaceae caricetosum gracilis w dolinie środkowej Warty (Środkowa Polska)
    Autorzy:
    Gajewski, P.
    Grzelak, M.
    Kaczmarek, Z.
    Owczarzak, W.
    Tylman, O.
    Runowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/337387.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
    Tematy:
    reed canary grass meadows
    nature evaluation
    analysis of flora
    łąki mozgowe
    waloryzacja przyrodnicza
    analiza flory
    Opis:
    The paper provides an assessment of habitat conditions of Phalaridetum arundinaceae caricetosum gracilis subassociation. Phytosociological research was conducted in a vegetation season of 2017 in the middle Warta, near Poznań, in the area with varied moisture and trophic conditions. Variety of flora, a botanical structure and a phytosociological one were assessed. Three soil opencasts were done within the area. Such properties as reaction, the content of total carbon and nitrogen, texture, soil density and its particle density, porosity, maximal hygroscopic capacity, water bond potentials of soil, readily and total available water were marked. In an investigated area, a subassociation of Phalaridetum arundinaceae caricetosum gracilis usually formed degraded barren. The crop as well as an economic value of species in the habitat were low. A systematic affiliation of syngenetic groups in an association of Phalaridetum arundinaceae and a subassociation of Phalaridetum arundinaceae caricetosum gracilis in the valley of Warta river was strongly connected with a percentage share of species which formed a variant of reed cane. In the researched area, Murshic soils in various in stages of mucking were a dominant soil habitat of a subassociation Phalaria arundinaceae caricetosum gracilis. In these soils, a peat-forming process had been stopped and replaced with decession of organic matter. A change of a soil-forming process was probably a result of a natural lowering of soil-ground water level, which had been triggered by an unfavorable water balance.
    W pracy przedstawiono ocenę warunków siedliskowych podzespołu Phalaridetum arundinaceae caricetosum gracilis. Badania fitosocjologiczne przeprowadzono w sezonie wegetacyjnym 2017 w dolinie środkowej Warty w okolicach Poznania, na obszarze o zróżnicowanych warunkach wilgotnościowych i troficznych. Oceniono różnorodność szaty roślinnej, strukturę botaniczną i fitosocjologiczną. Na badanym terenie podzespół Phalaridetum arundinaceae caricetosum gracilis tworzył zazwyczaj zdegradowane nieużytki. Cechowały go niskie plony, a także mała wartość gospodarcza gatunków tworzących to zbiorowisko. Przynależność systematyczna grup syngenetycznych w zespole Phalaridetum arundinaceae i podzespole Phalaridetum arundinaceae caricetosum gracilis w dolinie Warty była ściśle powiązana z procentowym udziałem gatunków tworzących wariant szuwaru mozgowego. Na badanym terenie dominującym siedliskiem glebowym podzespołu Phalaria arundinaceae caricetosum gracilis były gleby torfowo-murszowe, wykazujące różne stadia zmurszenia. W glebach tych proces torfotwórczy został przerwany i zastąpiony decesją materii organicznej. Zmiana procesu glebotwórczego była przypuszczalnie wynikiem naturalnego obniżenia się poziomu zwierciadła wody glebowo-gruntowej, co spowodowane było prawdopodobnie niekorzystnym bilansem wodnym.
    Źródło:
    Journal of Research and Applications in Agricultural Engineering; 2018, 63, 2; 57-62
    1642-686X
    2719-423X
    Pojawia się w:
    Journal of Research and Applications in Agricultural Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Economic Analysis of Wonderful Kola (Hydrocotyle asiata) Marketing in Kaduna North Local Government Area of Kaduna State, Nigeria
    Autorzy:
    Sodimu, A. I.
    Ogunkalu, O. A.
    Komolafe, A. S.
    Sadiq, Z. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1118153.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Economic
    Hydrocotyle asiata
    Kaduna
    North Marketing
    Opis:
    The study examines the economic analysis of Hydrocotyle asiata in Kaduna, North Local Government Area of Kaduna State. One hundred (100) questionnaires were randomly administered and forty-one (41) were retrieved from the respondents. Descriptive statistics, farm budgetary techniques and marketing efficiency were used to analyze the data collected. The results show that 60.98% of all sellers were male, while that of female was 39.02%. In addition, 48.78% of the marketers were aged between 31 – 40 years and a majority, 68.29% are married. Furthermore, 43.90% of all these individuals had at least primary education, while 4.88% had no formal education. The traders were also found to be faced with challenges of transportation, seasonality, storage, price fluctuation and pest infestation. The marketing of kola (Hydrocolyte asiata) in the study area is profitable and efficient, with a net income of eleven thousand eight hundred and fifty-one naira, twelve kobo (N11,851.12) per annum and a marketing efficiency of 40.40. However, it is recommended that adequate storage facilities be provided to check excessive dryness of the kola and pest infestation during storage. Moreover, the marketers should form a cooperative group in order to access loan and credit facilities from government so as to boost and improve their market.
    Źródło:
    World News of Natural Sciences; 2017, 9; 1-6
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Analysis of the Electron Density and Drift Rate of Solar Burst Type III During 13th of May 2015
    Autorzy:
    Ali, M. O.
    Hamidi, Z. S.
    Shariff, N. N. M.
    Monstein, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192997.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Coronal Mass Ejections (CMEs)
    Sun
    X-ray region
    radio region
    solar burst
    solar flare
    type III
    Opis:
    During 13th of May 2015, the solar wind is very high velocity, which is 733 kms-1 as compared to 367.5 kms-1. It is believed that the plasma–magnetic field interactions in the solar corona can produce suprathermal electron populations over periods from tens of minutes to several hours, and the interactions of wave-particle and wave-wave lead to characteristic fine structures of the emission. An intense and broad solar radio burst type II was recorded by CALLISTO spectrometer from 20-85 MHz. Using data from a the Blein observatory, the complex structure of solar burst type III can also be found in the early stage of the formation of type III solar burst type event due to active region AR 12339. The drift rate of solar burst type III exceeds 1.0 MHz/s with 6.318 x1012 e/m3 a density of electron in the solar corona. There were also 2 groups of solar radio burst type III were observed. This CME was detected at 08:36 UT which is 1and ½ hour after the solar burst detected. This event shows a strong radiation in radio region, but not in X-ray region.
    Źródło:
    World Scientific News; 2016, 31; 1-11
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review and perspective of high-k dielectrics on silicon
    Autorzy:
    Hall, S.
    Buiu, O.
    Mitrovic, I. Z.
    Lu, Y.
    Davey, W. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/309000.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    high-k dielectrics
    dielectric constant
    hafnia
    interfacial layer
    aluminates
    silicates
    Opis:
    The paper reviews recent work in the area of high-k dielectrics for application as the gate oxide in advanced MOSFETs. Following a review of relevant dielectric physics, we discuss challenges and issues relating to characterization of the dielectrics, which are compounded by electron trapping phenomena in the microsecond regime. Nearly all practical methods of preparation result in a thin interfacial layer generally of the form SiOx or a mixed oxide between Si and the high-k so that the extraction of the dielectric constant is complicated and values must be qualified by error analysis. The discussion is initially focussed on HfO2 but recognizing the propensity for crystallization of that material at modest temperatures, we discuss and review also, hafnia silicates and aluminates which have the potential for integration into a full CMOS process. The paper is concluded with a perspective on material contenders for the "end of road map" at the 22 nm node.
    Źródło:
    Journal of Telecommunications and Information Technology; 2007, 2; 33-43
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efekt regresji do średniej na Giełdzie Papierów Wartościowych w Warszawie przed i po kryzysie finansowym
    Autorzy:
    I, Benedykt P U C Z K O W S K
    O, Anna R U T K O W S K A - Z I A R K
    A, Alicja C I C H O C K
    Powiązania:
    https://bibliotekanauki.pl/articles/701829.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Ekonomista; 2014, 4
    0013-3205
    2299-6184
    Pojawia się w:
    Ekonomista
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possibility of Gamma-Induced Sensibilization Process in Rare-Earth Doped Yag Crystals
    Autorzy:
    Kaczmarek, S.
    Matkovskii, A. O.
    Mierczyk, Z.
    Kopczyński, K.
    Sugak, D. Yu.
    Durygin, A. N.
    Frukacz, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1945610.pdf
    Data publikacji:
    1996-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.72.Ji
    61.80.Ed
    78.20.Dj
    Opis:
    The influence of gamma irradiation on optical and lasing properties of Nd:YAG, Er:YAG and CTH:YAG single crystals was studied. The increase in optical output was established for rods without thermal annealing. The possible mechanisms of radiation sensibilization are discussed.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 2; 285-293
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nowe rezultaty badań mineralizacji polimetalicznej, PGE i REE w suwalskim masywie anortozytowym (NE Polska)
    New results of polymetallic, PGE and REE mineralization research in the Suwałki Anorthosite Massif (NE Poland)
    Autorzy:
    Wiszniewska, J.
    Krzemińska, E.
    Rosowiecka, O.
    Petecki, Z.
    Ruszkowski, M.
    Salwa, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2061641.pdf
    Data publikacji:
    2018
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    suwalski masyw anortozytowy (SMA)
    magnetyka
    grawimetria
    modelowanie 3D
    rudy Fe-Ti-V
    siarczki polimetali
    Au-Ag
    tellurki i REE
    Suwałki Anorthosite Massif (SAM)
    magnetics
    gravimetry
    Fe-Ti-V ores
    polymetallic sulphides
    telluride minerals and REE
    Opis:
    Suwalski masyw anortozytowy (SAM) występuje w podłożu krystalicznym północno-wschodniej Polski w obrębie 200-kilometrowej długości magmowego terranu mezoproterozoicznych skał facji AMCG (anortozyty–mangeryty–charnockity–granity), zwanego kompleksem mazurskim. SAM odkryto w wyniku rozpoznania wiertniczego wyraźnych ujemnych anomalii magnetycznych i grawimetrycznych. Z masywem anortozytowym są związane rozległe ujemne anomalie obu pól potencjalnych. Anomalię grawimetryczną otaczają pasma anomalii dodatnich wywołanych przez skały o podwyższonych gęstościach, takie jak: granitoidy, monzodioryty i granodioryty. Ujemną anomalię magnetyczną okalają pasma dodatnich anomalii o znacznych amplitudach, szczególnie mocno zaznaczające się od południa, zachodu i północy. Dodatnie anomalie są związane z występowaniem skał o stwierdzonej, silnej podatności magnetycznej spowodowanej zawartością ferrolitów: skał ilmenitowo-magnetytowych z towarzyszącą im mineralizacją siarczków Fe-Cu-Ni-Co. Złoża rud Fe-Ti-(V) w SAM zostały odkryte przez Państwowy Instytut Geologiczny (PIG) we wczesnych latach 60. XX w., pod miąższym nadkładem fanerozoicznych skał osadowych, w obrębie małych dodatnich anomalii magnetycznych, w rejonie Krzemianki, Udryna, ¬Jeleniewa i Jeziora Okrągłego. Złoża te udokumentowano za pomocą ok. 100 głębokich otworów wiertniczych, do głębokości 2300 m, a zasoby oszacowano w kat. C1 + C2 na ok. 1,5 mld ton rudy tytanomagnetytowej z wanadem, głównie w polu rudnym Krzemianka i Udryn. Wiek modelowy uzyskany metodą Re-Os NTIMS dla rud Fe-Ti-V i siarczków ze złóż Krzemianka i Jeziora Okrągłego wyniósł 1559 ±37 mln lat ze stosunkiem początkowym 187Os / 188Os = 1,16 ±0,06. Uznano go za wiek całego masywu suwalskiego. Pomimo wieloletnich badań, wgłębna budowa i forma masywu nie są dokładnie rozpoznane. Obecnie są wykonywane geofizyczno-geologiczne modelowania 3D danych otworowych z wykorzystaniem pakietu oprogramowania OasisMontaj (Geosoft). Model 3D jest generowany w aplikacji GeoModeller 3D (Intrepid Geophysics) w celu rozpoznania prawidłowości geologicznych oraz interpretacji anomalii magnetyczno-grawimetrycznych na całym obszarze masywu, łącznie z osłoną.
    Suwałki Anortosite Massif (SAM) occurs in the crystalline basement of NE Poland within 200 km of the magmatic, Mesoproterozoic AMCG (anorthosite–mangerite–charnockite–granite) rock suite terrane called the Mazury Complex. SAM was discovered as a result of the drilling research of the prominent negative magnetic and gravimetric anomalies. There is an extensive negative anomaly of both potential fields related to the anorthosite massif. Gravimetric anomaly is surrounded by the bands of positive anomalies caused by rocks with elevated densities, such as granitoids, monzondiorites and granodiorites. A negative magnetic anomaly is surrounded by the bands of positive anomalies with significant amplitudes, particularly strongly marked from the south, west and north. Positive magnetic anomalies are associated with the presence of rocks with proven strong magnetic susceptibility due to the content of ferrolites (ilmenite-magnetite rocks) with accompanying Fe-Cu-Ni-Co sulphide mineralization. Fe-Ti-(V) ore deposits in the SAM were discovered in the early 1960s, in the region of Krzemianka and Udryn, but also Jeleniewo and Jezioro Okrągłe, under a thick overburden of Phanerozoic sedimentary rocks within small positive magnetic anomalies. These deposits were documented in about 100 deep boreholes to a depth of 2300 m, and the resources in C1 + C2 category were estimated for about 1.5 billion tons of titanium-magnetite ores with vanadium, mainly in the Krzemianka and Udryn ore fields. The model age obtained by the Re-Os NTIMS method for Fe-Ti-V ores and sulphides from the Krzemianka and Jezioro Okrągłe ore deposits was 1559 ±37 Ma with an initial ratio of 187Os/188Os = 1.16 ±0.06. This age was recognized as the age of the entire Suwałki Massif. Despite many years of research, the deep structure and the form of the massif has not been fully recognized. At present, geophysical and geological 3D modelling of borehole data is carried out using the OasisMontaj (Geosoft) software package. The 3D model is generated in the GeoModeller 3D application (Intrepid Geophysics) in order to recognize the geological correctness and interpretation of magnetic-gravity anomalies of the whole massif and its cover.
    Źródło:
    Biuletyn Państwowego Instytutu Geologicznego; 2018, 472; 271--284
    0867-6143
    Pojawia się w:
    Biuletyn Państwowego Instytutu Geologicznego
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transformations of organic compounds in the open intercepting sewer
    Przemiany związków organicznych w otwartym kanale ściekowym
    Autorzy:
    Myszograj, S.
    Sadecka, Z.
    Suchowska-Kisielewicz, M.
    Płuciennik-Koropczuk, E.
    Qteishat, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/396661.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    biochemical process
    dissolved oxygen
    COD fraction
    open intercepting sewer
    cascade
    proces biochemiczny
    frakcja COD
    kanał ściekowy otwaty
    kaskadowy przepływ ścieków
    Opis:
    The paper presents results of studies concerning the designation of COD fraction in the raw wastewater. The test object was open intercepting sewer of Zielona Góra. Methodology for determining the COD fraction was based on the guidelines ATV- A 131. The real concentration of fractions in raw wastewater and the percentage of each fraction in total COD are different from data reported in the literature. The processes occurring in an open interceptor are also influenced by external factors. The most important of them are the ambient temperature and the extent of solar exposure. The changing temperature influences solubility of oxygen and activity of microorganisms. Open space and cascade arrangement of the interceptor decrease the probability of oxygen-free environment. In this case, the dominating significance in the decomposition of organic compounds is to be ascribed to oxygen processes.
    Głównym zadaniem sieci kanalizacyjnych jest odbiór i odprowadzenie ścieków do oczyszczalni lub odbiornika. Obecnie coraz częściej sieć kanalizacyjna jest analizowana w aspekcie zachodzących w niej procesów biochemicznych. Kanał doprowadzający ścieki do oczyszczalni można potraktować jak przepływowy odbiornik ścieków i przyjąć, że zachodzą w nim przemiany, których podstawą są procesy samooczyszczania zachodzące w rzekach. Zmiany w składzie ścieków w kanalizacji mogą w istotny sposób wpływać na pracę oczyszczalni i odbiornik ścieków oczyszczonych. W artykule przedstawiono wyniki badań zmian charakterystyki ścieków surowych dopływających do oczyszczalni ścieków kanałem otwartym. Ustalono, że na procesy zachodzące w kolektorze otwartym znaczący wpływ mają czynniki zewnętrzne. Najważniejszym z nich jest temperatura otoczenia i stopień nasłonecznienia. Temperatura ścieków wpływa na rozpuszczalność tlenu w ściekach i aktywność mikroorganizmów. System kaskadowego przepływu ścieków w kolektorze zmniejsza prawdopodobieństwo wystąpienia warunków beztlenowych.
    Źródło:
    Civil and Environmental Engineering Reports; 2012, 8; 19-28
    2080-5187
    2450-8594
    Pojawia się w:
    Civil and Environmental Engineering Reports
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase Transitions and Fundamental Ferroelectric Dispersion in DMAAl$\text{}_{1-x}$$Cr_{x}S$ Crystals
    Autorzy:
    Kapustianyk, V.
    Eliyashevskyy, Yu.
    Czapla, Z.
    Dacko, S.
    Czupiński, O.
    Rudyk, V.
    Serkiz, R.
    Sereda, S.
    Semak, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399057.pdf
    Data publikacji:
    2015-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    77.84.-s
    77.80.B-
    77.22.Gm
    65.40.Ba
    Opis:
    This paper presents the results of investigations of the temperature dependence of heat capacity and dielectric dispersion in the vicinity of ferroelectric-ferroelastic phase transition of dimethylammonium metal sulphate hexahydrate crystals DMAAl$\text{}_{1-x}$$Cr_{x}S$. In particular, it is shown that the isomorphous substitution of metal ion noticeably changes the temperature of phase transition and parameters of the fundamental ferroelectric dispersion observed around $T_{c1}$. These changes are explained in terms of clusters sizes and dynamics in the framework of order-disorder type phase transition mechanism.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 3; 791-794
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przepływy międzygałęziowe i podział rent w sektorze rolno-żywnościowym w Polsce w latach 1995–2005
    Autorzy:
    I, Bazyli C Z Y Ż E W S K
    A, Aldona M R Ó W C Z Y Ń S K A - K A M I Ń S K
    Powiązania:
    https://bibliotekanauki.pl/articles/701594.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Ekonomista; 2011, 2
    0013-3205
    2299-6184
    Pojawia się w:
    Ekonomista
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Identification of bacterial species in milk by MALDI-TOF and assessment of some oxidant-antioxidant parameters in blood and milk from cows with different health status of the udder
    Autorzy:
    Ozbey, G.
    Cambay, Z.
    Yilmaz, S.
    Aytekin, O.
    Zigo, F.
    Ozçelik, M.
    Otlu, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539172.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    dairy cows
    CMT
    mastitis
    malondialdehyde
    glutathione
    MALDI-TOF
    Opis:
    This study aimed to identify bacterial pathogens in milk samples from dairy cows with subclinical and clinical mastitis as well as to assess the concentrations of oxidant-antioxidant parameters [malondialdehyde (MDA), reduced glutathione (GSH), and total GSH levels] in both blood and milk samples. From a total of 200 dairy cows in 8 farms, 800 quarter milk samples obtained from each udder were tested in the laboratory for the presence of udder pathogens. Cultivated bacteria causing intramammary infection from milk samples were identified by Matrix-Assisted Laser Desorption/Ionization-Time of Flight (MALDI-TOF). In addition, from tested animals 60 cows were selected includıng 20 healthy cows that were CMT negative, 20 cows with subclinical mastitis (SM), and 20 cows with clinical mastitis (CM) for detection of MDA, GSH, and total GSH levels in blood and milk samples. Three hundred and eighty (47.5%; 380/800), 300 (37.5%; 300/800), and 120 (15%; 120/800) of milk samples, respectively were CMT positive or SM and CM, and those positives were cows from different farms. We observed that 87.4% (332/380), 25.3% (76/300), and 34.2% (41/120) of cows with CMT positive, CMT negative, and CM had bacterial growth. The most predominantly identified bacteria were Staphylococcus chromogenes (18.7%) obtained mainly from SM and Staphylococcus aureus (16.7%) as the most frequent cause of CM. According to our results, dairy cows with CM had the highest MDA levels, the lowest GSH, and total GSH levels in both blood and milk samples however, high MDA levels and low GSH levels in milk samples with SM were observed. Based on our results, lipid oxidant MDA and antioxidant GSH could be excellent biomarkers of cow’s milk for developing inflammation of the mammary gland. In addition, there was no link between nutrition and MDA and GSH levels.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 2; 269-277
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Third-generation LED LCU on Nanomechanical Properties of Orthodontic Adhesives
    Autorzy:
    Bilgic, F.
    Altan, H.
    Akinci Sözer, Ö.
    Arslanoglu, Z.
    Kale, E.
    Özarslan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031919.pdf
    Data publikacji:
    2017-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.-x
    62.20.Qp
    Opis:
    The aim of this study was to compare the hardness and elastic modulus of orthodontic adhesives cured with different light-curing units, based on light-emitting diodes. Standardized samples of orthodontic adhesives, Transbond™ XT, Opal® Bond™ and Light Bond™ were prepared in cylinder blocks and cured for three seconds with Valo Ortho LED (Ultradent Products, South Jordan, Utah) and Valo LED High-Power Mode. After grinding and polishing, specimens were stored in distilled water at 37°C for one day. Specimens were investigated using nanoindenter. Employment of Valo Ortho unit has resulted in significantly higher elastic modules for Transbond™ XT (p=0.041). The highest nanohardness and elastic modules were measured for Transbond™ XT cured with Valo Ortho (9.47 GPa; 81.85 GPa, respectively) and lowest for Opal® Bond™ for both Valo Ortho (0.44 GPa; 14.52 GPa, respectively) and Valo High-Power groups (0.44 GPa; 11.84 GPa, respectively).
    Źródło:
    Acta Physica Polonica A; 2017, 132, 3; 697-701
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical behavior of wheel steels with solid solution and precipitation hardening
    Autorzy:
    Kulyk, V. V.
    Shipitsyn, S. Ya.
    Ostash, O. P.
    Duriagina, Z. A.
    Vira, V. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/378578.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    railway wheel steel
    alloying
    resistance to flat formation
    wear
    damaging
    stalowe koło kolejowe
    stopowanie
    odporność na formowanie płaskie
    zużycie
    uszkodzenia
    Opis:
    Purpose: The aim of the proposed research is to investigate operational properties of a wheel steel treated with simultaneous solid solution and precipitation hardening at various carbon content, in comparison with the standard wheel grade T steel. Design/methodology/approach: The mechanical behaviour of wheel steels with increased content of silicon, manganese, vanadium, and nitrogen at various carbon content has been investigated and compared to that of the standard high-strength wheel grade T steel. The steels were undergo thermal treatment due to austenitic heating up to a temperature of 950.C with cooling down in water to 550.C followed by intense blowing of blanks in the air. After that, a tempering was performed at a temperature in the range of 450-650.C. Static strength (UTS), relative elongation (TEL), impact toughness tests (KCV) were determined on standard specimens. The characteristics of Mode I fatigue crack growth resistance of steel were determined on the basis of fatigue macrocrack growth rate diagrams da/dN–ΔKI, obtained by the standard method on compact specimens with the thickness of 10 mm at a frequency of 10-15 Hz and the stress ratio R = 0.1 and R = 0.5 of the loading cycle. The characteristics of Mode II fatigue crack growth resistance were determined on the basis of da/dN–ΔKII diagrams, obtained earlier method on edge notched specimens with the thickness 3.2 mm at a frequency of 10-15 Hz and R = -1 taking account of the crack face friction. Rolling contact fatigue testing was carried out on the model specimens. Findings: The regularities of the change of mechanical characteristics of the high-strength wheel steel with simultaneous solid solution and precipitation hardening at lowered carbon content under static, impact and cyclic loading are studied. Research limitations/implications: The results obtained using laboratory samples should be checked during a real railway wheels investigation. Practical implications: The investigated steel with simultaneous solid solution and precipitation hardening provides high wear resistance of the tread surface and damage resistance determined on the model wheels. Originality/value: A steel with solid solution hardening due to increased content of silicon (up to 0.7%) and manganese (up to 0.8%) and also with precipitation hardening (at optimal content of vanadium and nitrogen [V‧N]‧104 = 28.9%) at lowered carbon content (0.52) possesses high strength and fatigue fracture toughness in cases of Mode I and Mode II loading, causing better combination of wear and damage resistances of the tread surface of the model wheels, as compared to corresponding parameters for grade T steel.
    Źródło:
    Archives of Materials Science and Engineering; 2019, 95, 2; 49-54
    1897-2764
    Pojawia się w:
    Archives of Materials Science and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of structural-geometric parameters and elemental composition of spherical VT20 alloy powders
    Autorzy:
    Duriagina, Z. A.
    Filimonov, O. S.
    Kulyk, V. V.
    Lemishka, I. A.
    Kuziola, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/368582.pdf
    Data publikacji:
    2019
    Wydawca:
    Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
    Tematy:
    spherical VT20 alloy powders
    structural-geometric parameters
    additive technologies
    fluidity
    bulk density
    hydrodynamic radius
    proszek sferyczny
    technologie przyrostowe
    płynność
    gęstość objętościowa
    promień hydrodynamiczny
    Opis:
    Purpose: Identification of structural-geometrical parameters, technological properties and elemental composition of spherical powders in a wide fraction range with respect to the VT20 alloy has been carried out. This is important for evaluating the optimum filling of a given volume by mixture of powders of different fractions during 3D printing. Design/methodology/approach: During the investigation of spherical Ti-alloy powders, a comprehensive approach was performed using Scanning Electron Microscopy (SEM), Energy-Dispersive X-ray Spectroscopy (EDS), Dynamic Light Scattering (DLS) and Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The surface morphology of the powders was studied on a Tuescan Vega 3 Scanning Electron Microscope. Using the Quantax energy dispersive spectrometer, element distribution maps were obtained and histograms of element distribution in the investigated powders were constructed. ICP-MS analysis was performed to clarify the elemental composition. DLS analysis using Malvern's Zetasizer Nano-ZS equipment allowed us to determine the functional parameters (hydrodynamic radius – Rh, zeta potential – z and specific conductivity) of particles of titanium alloy powder that indirectly indicate a tendency to form conglomerates. Findings: According to the microscopic examinations, the VT20 alloy powder consists of globular-shaped particles with the lamellar traces on their surfaces. The uniformity of the chemical element distribution within each fraction of the investigated powders was confirmed by EDS, and the full conformity of the powder fractions with the elemental composition of the VT20 alloy was confirmed by ICP-MS. The DLS method allowed to establish that the formation of conglomerates would not occur within the studied fractions of the VT20 alloy powder. Research limitations/implications: The use of high sensitive investigation methods gives understanding of the mechanisms of fine structure formation and possibility to control the processes of powder coagulation in the stage of electrostatic interactions. Practical implications: The obtained results can be used for the formation of fine spherical particles of the powder, but at the same time, these technologies can be extended for the particles of non-spherical shape. Originality/value: The DLS method allowed to establish that the formation of conglomerates would not occur within the studied fractions of the VT20 alloy powder. This, in turn, will improve powder melting during 3D printing. The measured zeta potential values allowed us to reveal mechanisms of fine structure formation and to control the processes of powder coagulation in the stage of electrostatic interactions.
    Źródło:
    Journal of Achievements in Materials and Manufacturing Engineering; 2019, 95, 2; 49-56
    1734-8412
    Pojawia się w:
    Journal of Achievements in Materials and Manufacturing Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Krwiopijstwo jako othering lub doświadczenia podróżnicze z Galicji XVIII wieku. Kilka uwag o postkolonializmie i dyskursie wampirycznym
    Autorzy:
    z, Christoph A u g u s t y n o w i c
    Powiązania:
    https://bibliotekanauki.pl/articles/702021.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Historyka studia metodologiczne; 2012, 42
    0073-277X
    Pojawia się w:
    Historyka studia metodologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Enlargement of Type II Burst After Type III at AR 12522 on 16th March 2016 In Conjunction With Flare-Related Coronal Mass Ejections Event
    Autorzy:
    Husien, Nurulhazwani
    Hamidi, Z. S.
    Shariff, N. N. M.
    Ali, M. O.
    Zainol, N. H.
    Sabri, S. N. U.
    Monstein, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178545.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Coronal Mass Ejections
    Sun
    X-ray emission
    Opis:
    On 16th March 2016 the solar radio burst type II is recorded to appear on spectrograph after the type III formation. These two bursts related to the Coronal Mass Ejections (CMEs) event that recorded by the SOHO spacecraft several minutes before the formation of Type III on the spectrograph. It has been reported that the Type III burst a fast drift compared to the Type II burst. In this paper, the calculation has been proved that the type III burst has a higher drift rate compared to Type II. These two events of Type II and III burst also has been contributing to the formation of C class flare with magnitude of C2.2 It is also proven that the type III burst has a fast drift rate compared to type II burst. In this case, the type III has a fast drift rate of 81% compared to the type II burst. During this event, the active region AR 12522 erupted the C-class X-ray emission with magnitude of C2.2 contribute to these type III and II burst
    Źródło:
    World Scientific News; 2017, 70, 2; 230-240
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determinanty natychmiastowych stóp zwrotu z akcji spółek Skarbu Państwa dokonujących pierwotnych ofert publicznych
    Autorzy:
    I, Leszek C Z A P I E W S K
    I, Tomasz J E W A R T O W S K
    I, Michał K A Ł D O Ń‑ S K
    A, Jacek M I Z E R K
    Powiązania:
    https://bibliotekanauki.pl/articles/701809.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Ekonomista; 2014, 4
    0013-3205
    2299-6184
    Pojawia się w:
    Ekonomista
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Status Assessment of Heavy Metals in Water of the Lepenci River Basin, Kosova
    Autorzy:
    Bytyçi, P.
    Fetoshi, O.
    Durmishi, B. H.
    Etemi, F. Z.
    Çadraku, H.
    Ismaili, M.
    Abazi, A. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/123080.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    atomic absorption spectrophotometry
    river water
    heavy metals
    WQI
    quality
    correlation
    Opis:
    Water represents an essential element for life and living things on earth. Aquatic ecosystems play a decisive role in the socio-economic development in urban and rural areas. In recent decades, there has been concern at the global level with regard to the deterioration of aquatic ecosystems due to the pollution, which is a product of mainly anthropogenic activity. Heavy metals pollution is worrisome for the ecological balance of the aquatic environment, affecting a variety of organisms. Therefore, the objective of this paper was to characterize the quality of water in the Lepenci River basin, to express heavy metals concentration, and to determine the surface water quality index in this basin. In order to achieve such an objective, water samples were collected at eight stations for analyzing the concentrations for heavy metals. Heavy metals were determined by means of atomic absorption spectrophotometry. A good correlation was found between Pb and Zn (r = 0.84), whereas the average negative correlation coefficient was shown between Mn and Cr (r = -0.6513). The heavy metals concentrations varied from 0.0092 to 0.1135 mg/L.The mean concentrations of heavy metals found in the river water were in the order of: Mn > Fe > Pb > Ni > Cd > Zn > Cr > Cu. The Water Quality Index varied from 57 to 81, with the average value of WQI = 68.1250, which ranks the surface water of this basin as fair. From the results we have concluded that the Lepenci River waters during the monitoring period have had low pollution from heavy metals.
    Źródło:
    Journal of Ecological Engineering; 2018, 19, 5; 19-32
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Production of Coronal Mass Ejections in Relation With Complex Solar Radio Burst Type III Correlated With Single Solar Radio Burst Type III
    Autorzy:
    Hussien, Nurul Hazwani
    Hamidi, Z. S.
    Ali, M. O.
    Sabri, S. N. U.
    Zainol, N. H.
    Shariff, N. N. M.
    Moinstein, C
    Powiązania:
    https://bibliotekanauki.pl/articles/1192988.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Sun
    Solar radio burst
    type III
    single Solar Radio Burst Type (SRBT) III
    complex Solar Radio Burst Type (SRBT) III
    Coronal Mass Ejection (CMEs)
    magnetic reconnection
    Opis:
    The complex solar radio burst type III is very related to generation of Coronal Mass Ejections (CMEs). In a previous study, they deduced that the burst was produced by electron beams accelerated in blast wave shocks and injected along open magnetic field lines, similar to the herringbone bursts at metric wavelengths. Usually, if there is another solar flare recorded during complex solar radio burst type III it should be type II burst. Different for this event, the single solar radio burst recorded occur 8 minutes 30 seconds before the complex solar radio burst type III. The Coronal Mass Ejections also recorded occurred 7 hours before the single and complex solar radio burst type III. It is noted that CMEs occurred several hours before this event recorded by the SOHO websites.It is proved that the production of coronal mass ejection contributed to the production of complex solar radio burst type III.
    Źródło:
    World Scientific News; 2016, 36; 96-108
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Solar Radio Burst Type II Correlated With Minor CME Contributes to The Production of Geomagnetic Disturbance
    Autorzy:
    Husien, Nurulhazwani
    Hamidi, Z. S.
    Ali, M. O.
    Zainol, N. H.
    Sabri, S. N. U.
    Shariff, N. N. M.
    Faid, M. S.
    Ramli, Nabilah
    Monstein, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192691.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Solar radio burst
    solar radio burst type II
    Coronal Mass Ejections
    geomagnetic disturbance
    Opis:
    The solar radio burst type II on 4th November 2015 was associated with minor CME that not lead towards the Earth. This clear type II burst recorded on spectrographs detected by the antenna in several locations (Gauri, Almaty, Kasi and Ooty) were obtained from CALLISTO website. The average time of the burst occurred are around 03:24 UT until 03:28 UT with the clear minor CME emerged recorded by SOHO at 03:12 UT. Although it just a minor CME but it is still giving the effect on Earth as it contributes to geomagnetic disturbance on the Earth during that day. The affected region reported by The Local news is Sweden, where the radar system for aviation was not clear, but it is back to normal after a few hours later. This geomagnetic disturbance is powerful enough that may cause the satellite damage, endanger astronauts and produce destructive surges on power grids.
    Źródło:
    World Scientific News; 2016, 46; 165-175
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Analysis of Active Regions 11036 Characteristics Leads To Solar Flare Class C7.2 Phenomena
    Autorzy:
    Zainol, N. H.
    Hamidi, Z. S.
    Husien, Nurulhazwani
    Ali, M. O.
    Sabri, S. N. U.
    Shariff, N. N. M.
    Faid, M. S.
    Monstein, C.
    Ramli, Nabilah
    Powiązania:
    https://bibliotekanauki.pl/articles/1192106.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Solar Radio Burst Type II
    solar flare
    Callisto network
    active region
    Opis:
    The solar flares are generated from electromagnetic radiation which is sudden oscillation of the stored energy in the magnetic field of the sun. Flares are categorized according to their brightness as C, M and X, where X is the brightest. The X class flares caused a long-time solar storm and ionospheric radio waves sparkling. The moderate level M class flares mostly effect polar cups and cause short-time radio sparkling. However, the C class flares are weaker than the X and M flares. In this work, we present an active region from the disturbance of magnetic field on the area of the Sun and may lead to powerful event if the magnetic field become stronger. The CALLISTO system network that has been installed in Gauri, India observed data that contain Solar Radio Burst Type II (SRBT II) occurred on 22nd December 2009 at 04:57 UT to 05:02 UT. Five active regions were obtained from online data via internet from the Space Weather website and the Solar Monitor website. All data and information from these sources assist in analyze of the phenomena. The magnetic field and X-ray flux, proton density increase the possibilities that SRBT II observed by CALLISTO network to generate powerful solar flare. When X-ray flux level was at maximum, then solar flare was at peak point. However, solar activity level was low because among of five active regions present, only one C-class flare event occurred. The most active region that contributes this event is an AR11036 with C-class flare.
    Źródło:
    World Scientific News; 2016, 45, 2; 80-91
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The indoor radon survey in Serbian schools: can it reflect also the general population exposure?
    Autorzy:
    Žunić, Z. S.
    Bossew, P.
    Veselinović, N.
    Bochicchio, F.
    Carelli, V.
    Vaupotič, J.
    Čuknić, O.
    Simović, R.
    Vojinović, Z.
    Kisić, D
    Tollefsen, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/148743.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    indoor radon
    survey
    school
    Serbia
    Opis:
    A systematic indoor radon survey in elementary schools of Serbia is underway since 2008. Its current first phase covers all elementary schools in predominantly rural communities of Southern Serbia. The design of the survey, its implementation and the current state of its realization is shortly described. Part of this paper is devoted to discussion of the question if this survey could produce results representative also of the radon concentration in dwellings and of radon exposure of the general population, discussing some statistical aspects of representativity which arose during the work, namely, if the implementation leads to an unbiased estimate of the targeted quantities.
    Źródło:
    Nukleonika; 2010, 55, 4; 419-427
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural diversity and production of alder stands on former agricultural land at high altitudes
    Autorzy:
    Vacek, Z.
    Vacek, S.
    Podrazsky, V.
    Kral, J.
    Bulusek, D.
    Putalova, T.
    Balas, M.
    Kalouskova, I.
    Schwarz, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/41581.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    structural diversity
    stand structure
    alder stand
    agricultural land
    black alder
    Alnus glutinosa
    grey alder
    Alnus incana
    afforestation
    succession
    Sudetes Mountains
    Opis:
    The paper deals with the structural diversity and production of a less frequently studied type of alder stands originated on former agricultural lands in the 1950s, established partly by plantation and partly by natural succession in the area of the Krkonoše Mts. and the Orlické hory Mts. (Czech Republic). Four permanent research plots (PRP) were established at sites where Black alder (Alnus glutinosa L. Gaertn.) and Grey alder (Alnus incana L. Moench.) naturally occurs, each plot of 0.25 ha in size. The aim of the study was to evaluate the structure and development of the alder stands with respect to biodiversity, horizontal, vertical and species structure, diameter increment with emphasis on climate factors, and the quantity and quality of timber production. The results document low diversification of the studied stands in the PRPs. The horizontal structure is defined as random and clumped at sites at the highest altitude with high water table. The number of living trees with DBH ≥ 4 cm ranges between 556 to 828 trees ha-1 with the relative stand density index (SDI) 0.67–0.77. The stand volume ranges from 247 to 393 m3 ha–1, and decreases with higher altitudes. Low temperatures is limiting factor for radial growth in the high mountain areas, respectively low precipitation in the middle lands. Owing to a rather specific site character, as especially the spring area, the stands exhibit only average production, but the production quality is generally high. The quality timber is suitable for industrial use; the rot-affected trunk base parts usable for fuel represent only approximately 16%.
    Źródło:
    Dendrobiology; 2016, 75
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solar Radio Burst Type III due to M 2.9 Class Flare with a Geomagnetic Disturbance
    Autorzy:
    Hamidi, Z. S.
    Ali, M. O.
    Shariff, N. N. M.
    Monstein, C.
    Zainol, N. H.
    Hussien, Nurul Hazwani
    Ramli, Nabilah
    Farid, M. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1190207.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    solar radio burst
    solar storm
    flare
    geomagnetic disturbance
    Opis:
    Varying forms of solar radio burst were classified by their frequent changes in time, which are known as drift rate. There are 5 types of radio emission were named type I, II, III, IV and V. This paper is highlighted on the type III event which occurred on 27th August 2015. In the IP medium, type III solar radio burst can be classified in three different groups which representing three different situations of electron beam production and propagation which are isolated, complex and storm type III burst. The most powerful manifestation of solar activity is solar flare together with coronal mass ejections, eruptive prominences and the solar wind are the solar events which affect the earth's atmosphere and can cause geomagnetic disturbance. In this study, the effect of M class flare with solar radio burst type III was investigated. During the day, the solar wind proton density seems to be high which is 8.4 protons/cm3 and accompanied by normal solar wind speed of 348.7 km/Sec. Spaceweather.com reported that there is one sunspot was detected (AR2403) and M class of the flare was detected during the day at 0544 UT. The data geomagnetic signal shows that during the day only geomagnetic disturbance that occur no such geomagnetic storm since the sunspot not facing the earth directly.
    Źródło:
    World Scientific News; 2016, 44; 155-167
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of the Nanocrystalline $DyMnO_{3}$ Compound
    Autorzy:
    Dyakonov, V.
    Szytuła, A.
    Baran, S.
    Kravchenko, Z.
    Zubov, E.
    Iessenchuk, O.
    Bazela, W.
    Dul, M.
    Zarzycki, A.
    Szymczak, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538453.pdf
    Data publikacji:
    2010-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    75.47.Lx
    75.50.Ee
    75.75.-c
    Opis:
    We report on the X-ray powder diffraction and magnetic measurements of the polycrystalline and the two nanocrystalline samples of $DyMnO_{3}$ compound synthesized at temperatures of 800 and 850°C. All samples at room temperature crystallize in the orthorhombic crystal structure (space group Pnma). The crystal structure parameters determined change only slightly with preparation methods but the average grains size of the nanoparticles determined from X-ray data increases significantly with increasing annealing temperature. Temperature dependence of the magnetic susceptibility indicates the antiferromagnetic order in Dy sublattice at low temperatures.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 4; 607-610
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetoresistance of Polycrystalline La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ Films in a Microwave Magnetic Field
    Autorzy:
    Lučun, A.
    Butkutė, R.
    Maneikis, A.
    Kiprijanovič, O.
    Anisimovas, F.
    Gradauskas, J.
    Sužiedėlis, A.
    Vengalis, B.
    Kancleris, Ž.
    Ašmontas, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047240.pdf
    Data publikacji:
    2007-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Gk
    75.47.Lx
    07.57.Kp
    Opis:
    We present new experimental evidence indicating the importance of magnetic field component of microwave field (f=9.4 GHz) for magnetoresistive properties of polycrystalline La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ films. The microwave measurements revealed a different character of the temperature-dependent electrical resistance of polycrystalline La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ films placed in the centre (maximal amplitude of H$\text{}_{10}$ wave vector) and at a narrow wall of the wave-guide (reduced H$\text{}_{10}$ amplitude). Theoretical estimations of the influence of substrate onto distribution of microwave electric and magnetic fields in the waveguide were performed using the finite-difference time-domain method.
    Źródło:
    Acta Physica Polonica A; 2007, 111, 1; 147-152
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Current Situation of Radio Frequency Interference (RFI) Profile at Outdoor and Indoor Sites of Faculty of Applied Sciences, UITM, Malaysia
    Autorzy:
    Hamidi, Z. S.
    Nizamudin, Nur Izzani
    Shariff, N. N. M.
    Syazwan, M.
    Husien, Nurulhazwani
    Ali, M. O.
    Zainol, N. H.
    Ramli, Nabilah
    Sabri, S. N. U.
    Monstein, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1191429.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Radio Frequency Interference (RFI)
    radio astronomy
    RFI sources
    Opis:
    This Radio Frequency Interference (RFI) study is currently one of a main sub-research in radio astronomy in Malaysia. The main objective of this monitoring is to test and qualify the potential of radio astronomical sources that can be observed in Malaysia generally. Analysis process focuses at indoor and outdoor of Faculty of Applied Sciences, UITM Shah ALAM, Malaysia (latitude: 03°06.534’N, longitude: 101°50.396’E). There are three mobile network communications that operate at the upper band frequency of 1800MHz, which are Maxis (1805-1830 MHz), Celcom (1830-1855 MHz) and Digi (1855-1880 MHz) for GSM/LTE network. We observed that both sites having the highest and second highest peak at the same frequency of 420 MHz and 1835 MHz with the same source, which were due to mobile application followed by the lowest peak due to radio navigation satellite. We verified that the source of RFI of 1835 MHz at the Faculty of Applied Sciences may come from Celcom mobile telecommunication network signal because there is transmitter on top of two Celcom towers. This observation must be continuously done to ensure that RFI level does not increase drastically and to ensure that allocation spectrum band that was reserved for radio astronomy activities was always protected.
    Źródło:
    World Scientific News; 2016, 40; 23-33
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seamless communication for crisis management
    Ponadsystemowa łączność do zarządzania kryzysowego
    Autorzy:
    Wojciechowicz, W.
    Fournier, J.
    Konecny, M.
    Vanya, S.
    Stoodley, J.
    Entwisle, P.
    Hein, D. M.
    Machalek, A.
    Fournaris, A.
    Uriarte, M.
    Lopez, O.
    O'Neill, S.
    Bradl, H.
    Balogh, Z.
    Gatial, E.
    Hluchy, L.
    Mirosław, T.
    Zych, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/298322.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    SECRICOM
    bezszwowa komunikacja
    zarządzanie kryzysowe
    Multi Bearer Router
    MBR
    Push To Talk
    PTT
    SECRICOM Silentel
    Secure Docking Module
    SDM
    Secure Agent Infrastructure
    SAI
    Communication Security Monitoring and Control Centre
    CSMCC
    siódmy program ramowy
    7PR
    Trusted Computing
    seamless communication
    crisis management
    Push To Talk (PTT)
    Seventh Framework Programme
    FP7
    Opis:
    SECRICOM - Seamless Communication for crisis management was a research and development project, realised within the Seventh Framework Programme (7PR). The aim of this project was to develop reference solution based on existing infrastructure, which will be capable to ensure secure and efficient communication for operational crisis management. The project was an answer to the European Security Research Advisory Board (ESRAB) report, in which key requirements for a communication system have been stated. Secure and efficient communication system is a necessity for effective crisis management. It is assumed that such infrastructure may significantly increase rescue actions effectiveness. Currently, however, there are cases when various services (not only domestically but also internationally) use heterogeneous telecommunications systems. It results in the lack of or significant problems with mutual communication. Such situation is often considered problematic and posing a threat to the effective rescue actions. For this purpose, a secure and multi-platform communications system (SECRICOM Silentel) has been developed within SECRICOM project. The Multi Bearer Router (MBR) optimise the backbone network by the use of multiple bearers and dynamic adjustment to various conditions. Advance mechanisms enhancing end-user devices' security - Secure Docking Module (SDM) - have been developed using Trusting Computing principles. Secure Agent Infrastructure (SAI) ensures - based on agents' infrastructure - secure access to distributed data. The system is supplemented with network monitoring platform - Communication Security Monitoring and Control Centre. The SECRICOM project resulted in a communication system prototype, which is capable of ensuring interoperability as well as secure and efficient communication for operational crisis management. This system has been demonstrated on several occasions to the stakeholders.
    SECRICOM - Seamless Communication for crisis management to projekt badawczo-rozwojowy, który został zrealizowany w ramach siódmego programu ramowego (7PR). Celem projektu było wypracowanie bezpiecznej i, co ważne, bazującej na istniejącej infrastrukturze platformy komunikacyjnej do operacyjnego zarządzania kryzysowego. Projekt ten stanowi odpowiedź na raport European Security Research Advisory Board (ESRAB), w którym określono najważniejsze wymagania odnośnie do systemu komunikacji. Bezpieczny i wydajny system komunikacji jest warunkiem koniecznym do efektywnego zarządzania w sytuacjach kryzysowych. Przyjmuje się, że taka platforma jest w stanie znacząco zwiększyć efektywność prac służb ratunkowych. Obecnie jednak są przypadki, gdy służby ratunkowe (nie tylko na arenie międzynarodowej, lecz także podczas działań w jednym kraju) korzystają z niejednorodnych systemów telekomunikacyjnych, co często skutkuje brakiem lub istotnymi problemami z wzajemną łącznością. Sytuacja ta jest postrzegana jako problematyczna i stanowi zagrożenie dla efektywnego działania służb ratunkowych. W ramach projektu SECRICOM opracowano system międzyplatformowej, bezpiecznej łączności SECRICOM Silentel. Za optymalizację transmisji danych (w tym wykorzystanie wielu nośnych oraz dynamiczne dostosowywanie się do warunków) w sieci dystrybucyjnej oraz szkieletowej odpowiada Multi Bearer Router (MBR). Zaawansowane mechanizmy zwiększające bezpieczeństwo urządzeń końcowych - Secure Docking Module (SDM) - opracowano z wykorzystaniem pryncypiów Trusted Computing. Secure Agent Infrastructure (SAI) zapewnia - oparty na infrastrukturze agentów - bezpieczny dostęp do rozproszonych danych. System uzupełnia platforma nadzoru nad siecią - Communication Security Monitoring and Control Centre. Jako rezultat projektu zbudowano oraz kilkukrotnie zademonstrowano prototypową wersję systemu komunikacji. System ten jest zdolny do zapewnienia interoperacyjnej, bezpiecznej i wydajnej łączności w zarządzaniu w sytuacjach kryzysowych.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2012, 15(1); 65-79
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charging Phenomena at the Interface Between High-k Dielectrics and SiOx Interlayers
    Autorzy:
    Engström, O.
    Raeissi, B.
    Piscator, J.
    Mitrovic, I. Z.
    Hall, S.
    Gottlob, H. D. B.
    Schmidt, M.
    Hurley, P. K.
    Cherkaoui, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/308138.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    defects
    dielectrics
    high-k
    metal oxide semiconductor
    Opis:
    The transition regions of GdSiO/SiOx and HfO2/ SiOx interfaces have been studied with the high-k layers deposited on silicon substrates. The existence of transition regions was verified by medium energy ion scattering (MEIS) data and transmission electron microscopy (TEM). From measurements of thermally stimulated current (TSC), electron states were found in the transition region of the HfO2/SiOx structures, exhibiting instability attributed to the flexible structural molecular network expected to surround the trap volumes. The investigations were focused especially on whether the trap states belong to an agglomeration consisting of a single charge polarity or of a dipole constellation. We found that flat-band voltage shifts of MOS structures, that reach constant values for increasing oxide thickness, cannot be taken as unique evidence for the existence of dipole layers.
    Źródło:
    Journal of Telecommunications and Information Technology; 2010, 1; 10-19
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dielectric Properties of Lyotropic Magnetic Liquid Crystal
    Autorzy:
    Kopčanský, P.
    Tomčo, L.
    Jadzyn, J.
    Swiergiel, J.
    Majorošová, J.
    Kubovčíková, M.
    Timko, M.
    Rajňák, M.
    Šipošová, K.
    Gažová, Z.
    Bednariková, Z.
    Hu, Chin-Kun
    Hayryan, S.
    Studenyak, I.
    Kovalchuk, T.
    Kovalchuk, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1387983.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.30.Gd
    61.30.St
    75.50.Mm
    Opis:
    An important feature of lyotropic liquid crystals is the self-assembly of the amphiphilic molecules as supermolecular structures. We have studied the formation of nematic liquid crystal phase in solutions containing lysozyme amyloid fibrils and magnetic nanoparticles using oscilloscopic method. Interaction of fibrils with magnetic nanoparticles under the external magnetic field resulted in fibril re-arrangement. The analysis of the obtained results suggests that the decrease in conductivity of solutions in presence of magnetic field is due to decrease of the ion mobility caused by re-arrangement of structures in the solution. The obtained results allow determination of the optimum ratio of the components which can lead to preparation of solutions with a more ordered structure in presence of magnetic field.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 632-634
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measuring wind gradients in agroforestry systems by shaded piche evaporimeters. II. Accuracies obtained in some African case studies
    Autorzy:
    Stigter, C J
    Kainkwa, R.M.R.
    Oteng'i, S.B.B.
    Onyewotu, L.O.Z.
    Mohammed, A.E.
    Ibrahim, A.A.
    Rashidi, M.G.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/26193.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    anemometry
    Piche evaporimeter
    wind reduction
    agroforest system
    Źródło:
    International Agrophysics; 2000, 14, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    CO2 storage potential of sedimentary basins of Slovakia, the Czech Republic, Poland and the Baltic States
    Autorzy:
    Šliaupa, S.
    Lojka, R.
    Tasáryová, Z.
    Kolejka, V.
    Hladík, V.
    Kotulová, J.
    Kucharič, L.
    Fejdi, V.
    Wójcicki, V.
    Tarkowski, R.
    Uliasz-Misiak, B.
    Šliaupienė, R.
    Nulle, I.
    Pomeranceva, R.
    Ivanova, O.
    Shogenova, A.
    Shogenov, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059731.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    CO2 geological storage
    saline aquifer
    coal bed
    EOR
    ECBM
    Opis:
    It has been increasingly realised that geological storage of CO2 is a prospective option for reduction of CO2 emissions. The CO2 geological storage potential of sedimentary basins with the territory of Slovakia, the Czech Republic, Poland, and the Baltic States is here assessed, and different storage options have been considered. The most prospective technology is hydrodynamic trapping in the deep saline aquifers. The utilisation of hydrocarbon (HC) fields is considered as a mature technology; however storage capacities are limited in the region and are mainly related to enhanced oil (gas) recovery. Prospective reservoirs and traps have been identified in the Danube, Vienna and East Slovakian Neogene basins, the Neogene Carpathian Foredeep, the Bohemian and Fore-Sudetic Upper Paleozoic basins, the Mesozoic Mid-Polish Basin and the pericratonic Paleozoic Baltic Basin. The total storage capacity of the sedimentary basins is estimated to be as much as 10170 Mt of CO2 in deep saline aquifer structures, and 938 Mt CO2 in the depleted HC fields. The utilisation of coal seams for CO2 storage is related to the Upper Silesian Basin where CO2 storage could be combined with enhanced recovery of coal-bed methane.
    Źródło:
    Geological Quarterly; 2013, 57, 2; 219--232
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pattern of tree diversity in lowland tropical forest in Nikiwar, West Papua, Indonesia
    Autorzy:
    Murdjoko, A.
    Djitmau, D.A.
    Ungirwalu, A.
    Sinery, A.S.
    Siburian, R.H.S.
    Mardiyadi, Z.
    Wanma, A.O.
    Wanma, J.F.
    Rumatora, A.
    Mofu, W.Y.
    Worabai, D.
    May, N.L.
    Jitmau, M.M.
    Mentansan, G.A.F.
    Krey, K.
    Musaad, I.
    Manaf, M.
    Abdullah, Y.
    Mamboai, H.
    Pamuji, K.E.
    Raharjo, S.
    Kilmaskossu, A.
    Bachri, S.
    Nur-Alzai, N.
    Benu, N.M.H.
    Tambing, J.
    Kuswandi, R.
    Khayati, L.
    Lekitoo, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078261.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    dendrogram
    conservation
    Importance Value Index
    Shannon-Weiner
    understory
    Opis:
    Trees are significant components of ecosystems built by several widespread species. For instance, Papua forest is known to comprise abiotic and biotic elements. Also, certain plants have grown in popu- larity to a point where they are discovered almost everywhere. The purpose of this study, therefore, was to investigate tree diversity, distribution, and the importance of conservation. Data were collected in four locations using a total of 24 sample plots spread across Idoor, Karst, Persemaian, and Torembi, where seven, four, seven, and five plots were allocated, respectively. These forests formed a mixed natural plantation comprising 76 species from 35 families. Furthermore, Idoor and Karst generated the highest species diver- sity and varied significantly compared to Persemaian, while Torembi showed similarities with the other three locations. This condition formed three ecosystem communities across Persemaian, Karst, Idoor, and Torembi. Also, the composition of the dominant species showed variations at the seedling and sapling levels believed to structure the understory, while the pole and tree levels characterized the overstory. The total species status was described as critically endangered (CR) of two species, vulnerable (VU) of six species, least con- cern (LC) of 28 species, and data deficient (DD) species. Therefore, location management is advised to not only pay significant attention in terms of economic benefits but also ecological, including the provisions for ex-situ and in-situ conservation to support sustainable forest management.
    Źródło:
    Dendrobiology; 2021, 85; 78-91
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies of unicellular microorganisms Saccharomyces cerevisiae by means of positron annihilation lifetime spectroscopy
    Autorzy:
    Kubicz, E.
    Jasińska, B.
    Zgardzińska, B.
    Bednarski, T.
    Białas, P.
    Czerwiński, E.
    Gajos, A.
    Gorgol, M.
    Kamińska, D.
    Kapłon, Ł.
    Kochanowski, A.
    Korcyl, G.
    Kowalski, P.
    Kozik, T.
    Krzemień, W.
    Niedźwiecki, S.
    Pałka, M.
    Raczyński, L.
    Rajfur, Z.
    Rudy, Z.
    Rundel, O.
    Sharma, N. G.
    Silarski, M.
    Słomski, A.
    Strzelecki, A.
    Wieczorek, A.
    Wiślicki, W.
    Zieliński, M.
    Moskal, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/147902.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    environmental scanning electron microscopy (ESEM)
    free volume
    inverted microscopy
    positron annihilation
    positronium
    yeasts
    Opis:
    Results of positron annihilation lifetime spectroscopy (PALS) and microscopic studies on simple microorganisms, brewing yeasts, are presented. Lifetime of ortho-positronium (o-Ps) were found to change from 2.4 to 2.9 ns (longer-lived component) for lyophilized and aqueous yeasts, respectively. Also hygroscopicity of yeasts in time was examined, allowing to check how water – the main component of the cell – affects PALS parameters, thus lifetime of o-Ps were found to change from 1.2 to 1.4 ns (shorter-lived component) for the dried yeasts. The time sufficient to hydrate the cells was found below 10 hours. In the presence of liquid water, an indication of reorganization of yeast in the molecular scale was observed. Microscopic images of the lyophilized, dried, and wet yeasts with best possible resolution were obtained using inverted microscopy (IM) and environmental scanning electron microscopy (ESEM) methods. As a result, visible changes to the surface of the cell me mbrane were observed in ESEM images.
    Źródło:
    Nukleonika; 2015, 60, No. 4, part 1; 749-753
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    From Light to Heavy Nuclear Systems, Production and Decay of Fragments Studied with Powerful Arrays
    Autorzy:
    Casini, G.
    Morelli, L.
    Barlini, S.
    Piantelli, S.
    D'Agostino, M.
    Baiocco, G.
    Marchi, T.
    Abbondanno, U.
    Ademard, G.
    Appannababu, S.
    Bini, M.
    Bonnet, E.
    Borderie, B.
    Bougault, R.
    Bruno, M.
    Chbihi, A.
    Cinausero, M.
    Degerlier, M.
    Fabris, D.
    Frankland, J.
    Gelli, N.
    Gramegna, F.
    Gruyer, D.
    Gulminelli, F.
    Kordyasz, A.
    Kozik, T.
    Kravchuk, V.
    Kulig, P.
    Le Neindre, N.
    Lopez, O.
    Maurenzig, P.
    Olmi, A.
    Pasquali, G.
    Pârlog, M.
    Poggi, G.
    Rivet, M.
    Rosato, E.
    Sosin, Z.
    Spadaccini, G.
    Stefanini, A.
    Twarog, T.
    Valdrè, S.
    Vient, E.
    Raduta, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402639.pdf
    Data publikacji:
    2015-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    25.70.Gh
    25.70.Pq
    25.70.Mn
    29.40.-n
    Opis:
    Reactions between heavy-ions at various energy regimes produce many nuclear fragments which can be populated in highly excited states. The study of these fragments, detected at the end of their particle decay, is important to investigate nuclear forces and structure effects. In recent years there have been many efforts to extend these studies towards the drip-lines, i.e. to systems far from the β-stability valley, by using accelerated radioactive beams. The development of such infrastructures is accompanied by the development of more powerful detectors and associated electronics, capable to identify ions with very different sizes and kinetic energies. Here we give two examples which show how advanced arrays can contribute to the studies on nuclear phenomena. The examples come from the European FAZIA collaboration and from recent campaigns with the GARFIELD apparatus, the latter in operation at the INFN Legnaro Laboratory (Italy) where the SPES RIB facility is under construction.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 5; 1548-1551
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Positronium for antihydrogen production in the AEGIS experiment
    Autorzy:
    Consolati, G.
    Aghion, S.
    Amsler, C.
    Bonomi, G.
    Brusa, R.
    Caccia, M.
    Caravita, R.
    Castelli, F.
    Cerchiari, G.
    Comparat, D.
    Demetrio, A.
    Di Noto, L.
    Doser, M.
    Evans, C.
    Fanì, M.
    Ferragut, R.
    Fesel, J.
    Fontana, A.
    Gerber, S.
    Giammarchi, M.
    Gligorova, A.
    Guatieri, F.
    Haider, S.
    Hinterberger, A.
    Holmestad, H.
    Kellerbauer, A.
    Khalidova, O.
    Krasnicky, D.
    Lagomarsino, V.
    Lansonneur, P.
    Lebrun, P.
    Malbrunot, C.
    Mariazzi, S.
    Marton, J.
    Matveev, V.
    Mazzotta, Z.
    Müller, S.
    Nebbia, G.
    Nedelec, P.
    Oberthaler, M.
    Pacifico, N.
    Pagano, D.
    Penasa, L.
    Petracek, V.
    Prelz, F.
    Prevedelli, M.
    Ravelli, L.
    Rienaecker, B.
    Robert, J.
    Røhne, O.
    Rotondi, A.
    Sandaker, H.
    Santoro, R.
    Smestad, L.
    Sorrentino, F.
    Testera, G.
    Tietje, I.
    Widmann, E.
    Yzombard, P.
    Zimmer, C.
    Zmeskal, J.
    Zurlo, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1057954.pdf
    Data publikacji:
    2017-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    04.80.Cc
    07.77.-n
    36.10.Dr
    78.70.Bj
    Opis:
    The primary goal of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEGIS) collaboration is to measure for the first time precisely the gravitational acceleration of antihydrogen, H̅, a fundamental issue of contemporary physics, using a beam of antiatoms. Indeed, although indirect arguments have been raised against a different acceleration of antimatter with respect to matter, nevertheless some attempts to formulate quantum theories of gravity, or to unify gravity with the other forces, consider the possibility of a non-identical gravitational interaction between matter and antimatter. We plan to generate H̅ through a charge-exchange reaction between excited Ps and antiprotons coming from the Antiproton Decelerator facility at CERN. It offers the advantage to produce sufficiently cold antihydrogen to make feasible a measurement of gravitational acceleration with reasonable uncertainty (of the order of a few percent). Since the cross-section of the above reaction increases with n⁴, n being the principal quantum number of Ps, it is essential to generate Ps in a highly excited (Rydberg) state. This will occur by means of two laser excitations of Ps emitted from a nanoporous silica target: a first UV laser (at 205 nm) will bring Ps from the ground to the n=3 state; a second laser pulse (tunable in the range 1650-1700 nm) will further excite Ps to the Rydberg state.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 5; 1443-1449
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reconstruction of hit time and hit position of annihilation quanta in the J-PET detector using the Mahalanobis distance
    Autorzy:
    Sharma, N. G.
    Silarski, M.
    Bednarski, T.
    Białas, P.
    Czerwiński, E.
    Gajos, A.
    Gorgol, M.
    Jasińska, B.
    Kamińska, D.
    Kapłon, Ł.
    Korcyl, G.
    Kowalski, P.
    Kozik, T.
    Krzemień, W.
    Kubicz, E.
    Niedźwiecki, S.
    Pałka, M.
    Raczyński, L.
    Rudy, Z.
    Rundel, O.
    Słomski, A.
    Strzelecki, A.
    Wieczorek, A.
    Wiślicki, W.
    Zieliński, M.
    Zgardzińska, B.
    Moskal, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/146937.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    J-PET detector
    Mahalanobis distance
    time resolution
    threshold levels
    Opis:
    The J-PET detector being developed at the Jagiellonian University is a positron emission tomograph composed of the long strips of polymer scintillators. At the same time, it is a detector system that will be used for studies of the decays of positronium atoms. The shape of photomultiplier signals depends on the hit time and hit position of the gamma quantum. In order to take advantage of this fact, a dedicated sampling front-end electronics that enables to sample signals in voltage domain with the time precision of about 20 ps and novel reconstruction method based on the comparison of examined signal with the model signals stored in the library has been developed. As a measure of the similarity, we use the Mahalanobis distance. The achievable position and time resolution depend on the number and values of the threshold levels at which the signal is sampled. A reconstruction method as well as preliminary results are presented and discussed.
    Źródło:
    Nukleonika; 2015, 60, No. 4, part 1; 765-769
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Searches for discrete symmetries violation in ortho-positronium decay using the J-PET detector
    Autorzy:
    Kamińska, D.
    Gajos, A.
    Czerwiński, E.
    Bednarski, T.
    Białas, P.
    Gorgol, M.
    Jasińska, B.
    Kapłon, Ł.
    Korcyl, G.
    Kowalski, P.
    Kozik, T.
    Krzemień, W.
    Kubicz, E.
    Niedźwiecki, S.
    Pałka, M.
    Raczyński, L.
    Rudy, Z.
    Rundel, O.
    Sharma, N. G.
    Silarski, M.
    Słomski, A.
    Strzelecki, A.
    Wieczorek, A.
    Wiślicki, W.
    Zieliński, M.
    Zgardzińska, B.
    Moskal, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/147408.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    discrete symmetries
    J-PET
    ortho-positronium
    Opis:
    In this paper, we present prospects for using the Jagiellonian positron emission tomograph (J-PET) detector to search for discrete symmetries violations in a purely leptonic system of the positronium atom. We discuss tests of CP and CPT symmetries by means of ortho-positronium decays into three photons. No zero expectation values for chosen correlations between ortho-positronium spin and momentum vectors of photons would imply the existence of physics phenomena beyond the standard model. Previous measurements resulted in violation amplitude parameters for CP and CPT symmetries consistent with zero, with an uncertainty of about 10−3. The J-PET detector allows to determine those values with better precision, thanks to the unique time and angular resolution combined with a high geometrical acceptance. Achieving the aforementioned is possible because of the application of polymer scintillators instead of crystals as detectors of annihilation quanta.
    Źródło:
    Nukleonika; 2015, 60, No. 4, part 1; 729-732
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix
    Autorzy:
    Wieczorek, A.
    Zgardzińska, B.
    Jasińska, B.
    Gorgol, M.
    Bednarski, T.
    Białas, P.
    Czerwiński, E.
    Gajos, A.
    Kamińska, D.
    Kapłon, Ł.
    Kochanowski, A.
    Korcyl, G.
    Kowalski, P.
    Kozik, T.
    Krzemień, W.
    Kubicz, E.
    Niedźwiecki, S.
    Pałka, M.
    Raczyński, L.
    Rudy, Z.
    Rundel, O.
    Sharma, N. G.
    Silarski, M.
    Silarski, A.
    Strzelecki, A.
    Wiślicki, W.
    Zieliński, M.
    Moskal, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/147132.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    free volume
    positron annihilation
    polystyrene
    positronium
    scintillator
    Opis:
    The polystyrene doped with 2,5-diphenyloxazole as a primary fluor and 2-(4-styrylphenyl)benzoxazole as a wavelength shifter prepared as a plastic scintillator was investigated using positronium probe in wide range of temperatures from 123 to 423 K. Three structural transitions at 260, 283, and 370 K were found in the material. In the o-Ps intensity dependence on temperature, the significant hysteresis is observed. Heated to 370 K, the material exhibits the o-Ps intensity variations in time.
    Źródło:
    Nukleonika; 2015, 60, No. 4, part 1; 777-781
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Processing optimization with parallel computing for the J-PET scanner
    Autorzy:
    Krzemień, W.
    Bała, M.
    Bednarski, T.
    Białas, P.
    Czerwiński, E.
    Gajos, A.
    Gorgol, M.
    Jasińska, B.
    Kamińska, D.
    Kapłon, Ł.
    Korcyl, G.
    Kowalski, P.
    Kozik, T.
    Kubicz, E.
    Niedźwiecki, S.
    Pałka, M.
    Raczyński, L.
    Rudy, Z.
    Rundel, O.
    Sharma, N. G.
    Silarski, M.
    Słomski, A.
    Stola, K.
    Strzelecki, A.
    Trybek, D.
    Wieczorek, A.
    Wiślicki, W.
    Zieliński, M.
    Zgardzińska, B.
    Moskal, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/148285.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    data aquisition system (DAQ)
    parallel computing
    TOF-PET
    Opis:
    The Jagiellonian Positron Emission Tomograph (J-PET) collaboration is developing a prototype time of flight (TOF)-positron emission tomograph (PET) detector based on long polymer scintillators. This novel approach exploits the excellent time properties of the plastic scintillators, which permit very precise time measurements. The very fast fi eld programmable gate array (FPGA)-based front-end electronics and the data acquisition system, as well as low- and high-level reconstruction algorithms were specially developed to be used with the J-PET scanner. The TOF-PET data processing and reconstruction are time and resource demanding operations, especially in the case of a large acceptance detector that works in triggerless data acquisition mode. In this article, we discuss the parallel computing methods applied to optimize the data processing for the J-PET detector. We begin with general concepts of parallel computing and then we discuss several applications of those techniques in the J-PET data processing.
    Źródło:
    Nukleonika; 2015, 60, No. 4, part 1; 745-748
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Pilot Study of the Novel J-PET Plastic Scintillator with 2-(4-styrylphenyl)benzoxazole as a Wavelength Shifter
    Autorzy:
    Wieczorek, A.
    Moskal, P.
    Niedźwiecki, S.
    Bednarski, T.
    Białas, P.
    Czerwiński, E.
    Danel, A.
    Gajos, A.
    Gruntowski, A.
    Kamińska, D.
    Kapłon, Ł.
    Kochanowski, A.
    Korcyl, G.
    Kowal, J.
    Kowalski, P.
    Kozik, T.
    Krzemień, W.
    Kubicz, E.
    Molenda, M.
    Pałka, M.
    Raczyński, L.
    Rudy, Z.
    Rundel, O.
    Salabura, P.
    Sharma, N.
    Silarski, M.
    Słomski, A.
    Smyrski, J.
    Strzelecki, A.
    Uchacz, T.
    Wiślicki, W.
    Zieliński, M.
    Zoń, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402620.pdf
    Data publikacji:
    2015-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.57.uk
    29.40.Mc
    Opis:
    For the first time a molecule of 2-(4-styrylphenyl)benzoxazole containing benzoxazole and stilbene groups is applied as a scintillator dopant acting as a wavelength shifter. In this article a light yield of the plastic scintillator, prepared from styrene doped with 2 wt% of 2,5-diphenylbenzoxazole and 0.03 wt% of 2-(4-styrylphenyl)benzoxazole, is determined to be as large as 60% ± 2% of the anthracene light output. There is a potential to improve this value in the future by the optimization of the additives concentrations.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 5; 1487-1490
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-73 z 73

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies