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Przejdź do strony domowej biblioteki Pedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaPedagogiczna Biblioteka Wojewódzka im. Komisji Edukacji Narodowej w Lublinie
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Wyświetlanie 1-10 z 25
Tytuł:
Debate on skeletal elements of the Triassic conodont Cornudina Hirschmann
Autorzy:
Kılıç, A. M.
Plasencia, P.
Önder, F.
Tematy:
Cornudina
apparatus
multielement
conodont
Triassic
Kocaeli Peninsula
aparatura
konodonty
trias
Półwysep Kocaeli
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:
https://bibliotekanauki.pl/articles/139219.pdf  Link otwiera się w nowym oknie
Opis:
The long-ranging Early to Middle Triassic coniform conodont form-genus Cornudina Hirschmann occurs abundantly in the Anisian of NW Turkey, Northern Tethys. Although suggested to represent the P1 element of an apparatus of the Order Ozarkodinida Dzik, questions concerning the apparatus of Cornudina remain. A description of the probable phylogenetic trends in the P1 elements of Cornudina is attempted and the role of the form-genera Ketinella Gedik and Kamuellerella Gedik, as the alternative ramiform skeletal elements in the Cornudina multi-element apparatus, is investigated. The newly described, Gedikella quadrata gen. nov., sp. nov., is an S element, Kamuellerella rectangularis sp. nov., is either an S3 or an S4 element, and Ketinella goermueshi sp. nov., is an M element.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expanded perlite aggregate characterization for use as a lightweight construction raw material
Autorzy:
Celik, A. G.
Kilic, A. M.
Cakal, G. O.
Tematy:
perlite
lightweight aggregate
characteristic property
physical property
temperature
construction raw material
Pokaż więcej
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:
https://bibliotekanauki.pl/articles/109413.pdf  Link otwiera się w nowym oknie
Opis:
The purpose of this study is to investigate the use of İzmir (Menderes-Cumaovası) expanded perlite as a construction raw material by determining its characteristic properties, as well as its physical properties at different temperatures (up to 600°C). The perlites, having glassy, porous structure, were found to contain 70.68% SiO2 and 13.04% Al2O3. The physical properties of the perlites changed with temperature. The highest surface area, 524 m2/g, was obtained at 400°C. The physical properties were found to have high statistical relation. It was concluded that expanded perlite aggregates could be used as a construction raw material.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Observations of the pulsating subdwarf B star Feige 48 : constraints on evolution and companions
Autorzy:
Krzesiński, Jerzy
Kurtz, D. W.
Kawaler, S. D.
Watson, T. K.
Good, S.
Pakstiene, E.
Carlton, R. F.
Koen, C.
Schuh, S. L.
Riddle, R.
Deetjen, J. L.
Vuckovic, M.
Grauer, A.
Jiang, X. J.
Handler, G.
Moskalik, P.
Mukadam, A.
González Pérez, J. M.
Meištas, E.
Østensen, R.
Baran, A.
Kilkenny, D.
Vauclair, G.
Reed, M. D.
Bromage, G.
Chevreton, M.
Bradley, P. A.
Hürkal, Ö
Kalytis, R.
Ališauskas, D.
Anderson, R.
Kilic, M.
Ulla, A.
Burleigh, M.
Dreizler, S.
Cunha, M. S.
Janulis, R.
Wood, M. A.
Solheim, J. E.
Zoła, Stanisław
Stachowski, Grzegorz
Ogłoza, W.
Klumpe, E. W.
Dolez, N.
Opis:
Since pulsating subdwarf B (sdBV or EC14026) stars were first discovered, observational efforts have tried to realize their potential for constraining the interior physics of extreme horizontal branch stars. Difficulties encountered along the way include uncertain mode identifications and a lack of stable pulsation mode properties. Here we report on Feige 48, an sdBV star for which follow-up observations have been obtained spanning more than four years. These observations show some stable pulsation modes. We resolve the temporal spectrum into five stable pulsation periods in the range 340–380 s with amplitudes less than 1 per cent, and two additional periods that appear in one data set each. The three largest amplitude periodicities are nearly equally spaced, and we explore the consequences of identifying them as a rotationally split ℓ= 1 triplet by consulting a representative stellar model. The general stability of the pulsation amplitudes and phases allows us to use the pulsation phases to constrain the time-scale of evolution for this sdBV star. Additionally, we are able to place interesting limits on any stellar or planetary companion to Feige 48.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Analysis of observed voltage oscillations in silver doped high temperature superconductor YBCO
Autorzy:
Altinkok, A.
Olutas, M.
Yetis, H.
Kiliç, A.
Kiliç, K.
Tematy:
74.25.F-
74.72.-h
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/1052665.pdf  Link otwiera się w nowym oknie
Opis:
The effect of square wave current was investigated by the voltage-time (V-t curves) measurements at various external magnetic fields and periods (P) in silver doped YBCO. The general sinusoidal behavior of V-t curves was mainly interpreted as a dynamic competition between driving and pinning forces. It is observed that as the period of square wave current is increased, the amplitude of oscillation is also increased. The observed oscillations in the voltage was fitted by an common sinusoidal equation V(t)ımın(ω t+φ). It is also found that there is different phase angle φ values for each cycle. Fast Fourier transform measurements is applied to oscillation period (P_{I}) of the square wave current. The results give us that a physical mechanism is related with charge density waves. Intrinsically, in Ag doped YBCO, the pinned flux line system evokes the general behavior of charge density waves. Due to properties of the converting the square wave current to sinusoidal voltage oscillations, Ag doped YBCO sample can behave as double-integrator for the defined period, amplitude of square wave current and magnetic field values in time.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiative Lifetimes of Rydberg States in Neutral Gallium
Autorzy:
Yildiz, M.
Çelık, G.
Kiliç, H.
Tematy:
32.70.Cs
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/1808090.pdf  Link otwiera się w nowym oknie
Opis:
Radiative lifetimes were calculated using weakest bound electron potential model theory for $4s^{2}$ ns $\text{}^{2}S_{1//2}$ (n ≥ 7), $4s^{2}$ np $\text{}^{2}P^{0}_{1//2}$ (n ≥ 5), $4s^{2}$ np $\text{}^{2}P$ $\text{}^{0}_{3//2}$ (n ≥ 6), $4s^{2}$ nd $\text{}^{2}D_{3//2}^{0}$ (n ≥ 6), $4s^{2}$ nd $\text{}^{2}D$ $\text{}_{5//2}^{0}$ (n ≥ 6) series in neutral gallium. The use of the quantum defect theory and Martin's expressions allowed us to supply lifetime values along by means of the series above. The results obtained in this work presented good agreement with theoretical and experimental values. Moreover, some lifetime values not existing in the literature for highly excited Rydberg states in gallium atom were obtained using this method.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of Excited-State Ionization Potentials for Lithium-Like Sequence Using Weakest Bound Electron Potential Model Theory
Autorzy:
Çelik, G.
Yildiz, M.
Kiliç, H. Ş.
Tematy:
32.10.-f
31.50.-x
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/2047731.pdf  Link otwiera się w nowym oknie
Opis:
In this work, the theoretical calculation of excited-state ionization potentials for 1s$\text{}^{2}$2$\text{}_{p}$ $\text{}^{2}$P$\text{}_{1}\text{}_{/}\text{}_{2}$ , 1s$\text{}^{2}$3$\text{}_{s}^{2}$S$\text{}_{1}\text{}_{/}\text{}_{2}$ , 1s$\text{}^{2}$3$\text{}_{d}^{2}$D$\text{}_{1}\text{}_{/}\text{}_{2}$ , 1s$\text{}^{2}$4$\text{}_{s}^{2}$S$\text{}_{1}\text{}_{/}\text{}_{2}$ , 1s$\text{}^{2}$4$\text{}_{p}^{2}$P$\text{}_{1}\text{}_{/}\text{}_{2}$ , and 1s$\text{}^{2}$4$\text{}_{d}^{2}$D$\text{}_{1}\text{}_{/}\text{}_{2}$ iso-spectrum series of lithium-like elements were carried out using a weakest bound electron potential model theory for nuclear charges from Z=3 to Z=18. The Breit-Pauli approximation was used for relativistic contributions. The obtained values are compared with the experimental results from literature. The overall agreement between data obtained in this work and experimental data from literature can appear to be quite good being generally within 0.1% of experimental values.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A test setup for evaluating long-term measurement characteristics of optical mouse sensors
Autorzy:
Kanburoglu, F.
Kilic, E.
Dolen, M.
Koku, B.
Tematy:
sensors
control
navigation
testbed
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/384425.pdf  Link otwiera się w nowym oknie
Opis:
Due to significant advancements in optical navigation technology, optical mouse sensors (OMS) are increasingly employed as low-cost motion sensora in personal computing and robot navigation. This paper proposes a new test bed to study the long-term measurement characteristics of emerging OMS devices. With the utilization of this set-up, the attributes of a high-resolution OMS (Agilent ADNS-2051) are investigated under various critical operating conditions like changing surface velocity and the pattern. The paper illustrates that despite the problems addressed, the positioning accuracy of an OMS could be quite sufficient for some basic process control apptications.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel position estimators for timing belt drivers
Autorzy:
Kilic, E.
Dolen, M.
Koku, B.
Dogruer, C.
Tematy:
sensors
actuators
safety
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/384439.pdf  Link otwiera się w nowym oknie
Opis:
This paper focuses on viable position estimation schemes for timing belt drives where the position of the carriage (load) is to be calculated via reference models accepting input from a position sensor on the actuator of the timing belt. A detailied analysis on the source of transmission errors is presented a number of relevant mathematical modeis are developed utilizing a priori knowledge on the process. The paper illustrates that such schemes are very effective when the drive system is not subjected to external loads es well as widely changing operating conditions such as ambient temperature, belt tension.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 25

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