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Wyświetlanie 1-10 z 15
Tytuł:
Free Volume Study on Three Types of Shape Memory Polymers by Positron Annihilation
Autorzy:
Ujihira, Y.
Li, H.-L.
Ito, K.
Tematy:
64.70.Pf
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/2008187.pdf  Link otwiera się w nowym oknie
Opis:
Temperature dependence of nanoscopic environment of shape memory polymers such as polynorbornene (T$\text{}_{g}$≈313 K), polyurethane (T$\text{}_{g}$≈321 K=dynamic viscoelasticity, destruction of hydrogen bond ≈353 K) and styrene-butadiene copolymer (T$\text{}_{m}$=333 K) is observed in terms of free volume parameters - average size, numerical concentration and size distribution - estimated from positronium lifetime measurement, and mechanisms of their shape recoveries are discussed at a molecular level.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Overhauser effect and anisotropy of electron spin g-factor in GaAs / AlGaAs quantum wells
Autorzy:
Ito, T.
Shichi, W.
Ichida, M.
Gotoh, H.
Kamada, H.
Ando, H.
Tematy:
quantum well
electron spin g-factor
Overhouser effect
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/385175.pdf  Link otwiera się w nowym oknie
Opis:
To investigate the dependence of electron g-factor on magnetic field in GaAs / AlGaAs quantum wells time-resolved photoluminescence measurements under a high magnetic field in different experimental configuration, the magnetic field perpendicular (g up tack ) and parallel (g II) to the quantum confinement direction, has been studied. When the angle between the magnetic field and the confinement direction is 45°, the precession frequency varies depending on polarity of magnetic field and the circular polarization type of excitation light (sigma+ or sigma-). We found that these dependences of the precession frequency exhibit main features of Overhauser effect with an effective magnetic field of 0.5 T that nuclear spins react back on electron spin precession and the g-factor value is not affected by the effective magnetic field. The g+ and gii values agree well with the results of four-band k • p perturbation calculations.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Layout of functional modules and routing for preliminary design of automatic teller machines
Autorzy:
Inoue, K.
Masuyama, T.
Osaki, H.
Ito, T.
Tematy:
Module Layout
routing
simultaneous optimization
genetic algorithms
Design Intention
island model
Pokaż więcej
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:
https://bibliotekanauki.pl/articles/384515.pdf  Link otwiera się w nowym oknie
Opis:
In this study we address the preliminary design for the module layout and bill conveyance routes of automatic teller machines (ATMs). We determine a two-dimensional layout for the modules as below that are approximately rectangular if the ATM is viewed from the side. ATMs require the compact placement of modules within the chassis and conveyance routes that smoothly circulate bills. However, the intersection and overlapping of routes by which the bills are conveyed in opposite directions are not allowed. Applying the bottom-left method and route-design-oriented packing method to the layout of the modules and the direction-oriented maze routing expediting branching and interflow of routes to the bill conveyance route, the application orders are optimized simultaneously using genetic algorithms (GAs). Results show that suitable designs for the ATM including the case when modules are selected as well as placed are achievable using the above simultaneous optimization. The design intention is expressible by changing the weights associated with chassis dimensions, route lengths and the number of route bends, which compose the objective function. The proposed method is useful for efficiently advancing the preliminary design of ATMs. Finally, if island models pursuing individual targets are used along with a GA, the design becomes even more efficient.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron and Positronium Annihilation in Polymers Studied by Age-Momentum Correlation Spectroscopy
Autorzy:
Sato, K.
Murakami, H.
Ito, K.
Hirata, K.
Kobayashi, Y.
Tematy:
71.60.+z
78.70.Bj
82.30.Gg
42.70.jk
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/1812549.pdf  Link otwiera się w nowym oknie
Opis:
Positron (e⁺) and positronium (Ps) annihilation processes in polymers are studied by positron age-momentum correlation spectroscopy, which can sensitively probe momentum distributions of e⁺, p-Ps, and o-Ps. For polyether sulfone and ethylene tetrafluoroethylene copolymer belonging to oxygen-containing polymers (O group) and fluorine-containing polymers (F group), respectively, significant effects of positron trapping by polar element are observed. The Doppler profile of o-Ps pick-off annihilation is strongly influenced by F atoms, giving rise to anomalous broadening. The results are discussed together with our previous data of the S-I₃ correlation in order to explore the feasibility of chemical analysis around the free volumes by age-momentum correlation spectroscopy.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Supernova model discrimination with Hyper-Kamiokande
Autorzy:
Mineev, O.
Minakata, H.
Nakayoshi, K.
Gialanella, L.
Zaldivar, B.
Kato, A.
Kim, S. Y.
Ashida, Y.
Wilkes, R. J.
Garode, S.
Feng, J.
Vilela, C.
Pac, M. Y.
Karlen, D.
Suganuma, T.
Kajita, T.
Paganini, P.
Lu, X.
Gramegna, F.
Nakadaira, T.
Yano, T.
Ostrowski, Michał
Vivolo, D.
Matusiak, M.
Fiorillo, G.
Mazzucato, E.
Finch, A.
Hiraide, K.
Navarro-Garcia, B.
Mondal, T.
Ikeda, M.
Insler, J.
Kudenko, Y.
Sato, K.
Kumita, T.
Malinský, M.
Lamers James, M.
Nascimento Machado, L.
Wronka, S.
Ohta, K.
Iijima, T.
Gornea, R.
Maret, L.
Jeon, S. H.
Lim, I. T.
Fiorentini, A.
Matsumoto, R.
O'Connor, E.
Coleman, J.
Harada, M.
Kikawa, T.
Danilov, M.
Kearns, E.
Yamaguchi, Y.
Magaletti, L.
Cartwright, S. L.
Nishimura, Y.
Jang, J. S.
Radicioni, E.
Vasseur, G.
Barr, G.
Porwit, K.
Nakagiri, K.
La Commara, M.
Learned, J. G.
Hirota, S.
Marchi, T.
Mollo, C. M.
Di Palma, I.
Sakashita, K.
Izmaylov, A.
El Hedri, S.
Tsukamoto, T.
Ochoa-Ricoux, J. P.
Takemoto, Y.
Medhi, A.
Bonavera, L.
Hartz, M.
Pozimski, J.
Zakrzewski, T.
Chabera, M.
Kinoshita, T.
Stankevich, K. L.
Payne, D.
Renner, J.
Doyle, T. A.
Sashima, I.
Matsuno, S.
Takenaka, A.
Loverre, P.
Wachala, T.
Gumplinger, P.
Booth, N.
Onishchuk, Y.
Ichikawa, A. K.
Ovsiannikova, T.
Suzuki, A. T.
Kameda, J.
Sano, S.
Yoo, J.
Nakai, S.
Hartfiel, B.
Jiang, M.
Moon, C. S.
Pari, M.
Jamieson, B.
Hoshina, K.
Nakajima, Y.
Feusels, T.
Ruggles, C.
Drapier, O.
Prouse, N. W.
Kurjata, R.
Mefodiev, A.
Sekiguchi, T.
Aushev, V.
Labarga, L.
Blanchet, A.
Uchida, Y.
Berardi, V.
Yokoyama, M.
Evangelisti, A.
Kormos, L. L.
Yeum, D. N.
Wendell, R. A.
Iacob, F.
Ogawa, N.
O'Sullivan, E.
Yamamoto, K.
Itow, Y.
Boyd, S. B.
Pasternak, J.
Ruggeri, A. C.
Ozaki, H.
Boiano, A.
Smy, M. B.
Roth, S.
Kim, S. B.
Ferrazzi, B.
Xie, Z.
Xin, T.
Stellacci, S. M.
Fukuda, Y.
Kouzakov, K. A.
Kim, J. H.
Sobczyk, J.
Drakopoulou, E.
Miki, S.
De la Fuente, E.
Munteanu, L.
Yu, M.
Hernando-Morata, J. A.
Longhin, A.
Orozco-Luna, F.
Zarnecki, G.
Korzenev, A.
Spina, R.
Lamoureux, M.
Mongelli, M.
Tzanov, M.
Ioannisian, A.
Cafagna, F. S.
Mermod, P.
González-Nuevo, J.
Carroll, A.
Garde, C.
Grella, G.
Bernardini, E.
Palladino, V.
Kravchuk, L.
Boschi, T.
Playfer, S.
Tanaka, M.
Suvorov, S.
Rountree, S. D.
Aihara, H.
Buchowicz, A.
Ameli, F.
Akutsu, R.
Hassani, S.
Mahn, K.
Fernández-Martinez, E.
Cicerchia, M.
Barker, G. J.
Martin, D.
Idrissi Ibnsalih, W.
Anghel, I.
Fernandez, P.
Jonsson, P.
Cook, L.
Ishida, T.
Wark, D.
Martin, J. F.
Borjabad, S.
Checchia, C.
Seo, J. W.
Lindner, T.
Pavin, M.
Mora, F. J.
Miura, M.
Mellet, L.
Russo, S.
Sobel, H. W.
Taketa, A.
Ziembicki, M.
Khotjantsev, A.
Nakahata, M.
Di Meo, P.
Fujii, Y.
Daz Lopez, G.
Riccio, C.
Wilson, J. R.
Ito, S.
Marinelli, A.
Jang, H. I.
Shimizu, I.
Collazuol, G.
Finley, C.
Niewczas, K.
Gorin, A.
Berns, L.
Antonova, M.
Guigue, M.
Densham, C. J.
Sarmah, P.
Poutissou, J. -M.
Bozza, C.
McGrew, C.
Calabria, N. F.
Ito, H.
Bhadra, S.
Peña-Garay, C.
Shiozawa, M.
Skwarczynski, K.
Mariani, C.
Kakuno, H.
Magar, K.
Konaka, A.
Galinski, G.
Ludovici, L.
Taani, M.
Yen, S.
Friend, M.
Shaykina, A.
Cuen-Rochin, S.
Soler, F. J. P.
Jakkapu, M.
Mezzetto, M.
Murase, K.
Pointon, B. W.
Miller, E. W.
Marti, Ll.
Shin, C. D.
Dumarchez, J.
Kryukov, A. P.
Kasperek, J.
Ishidoshiro, K.
Nakamura, KI.
Pastore, C.
Inomoto, M.
Gomez-Cadenas, J. J.
Suárez Gómez, S. L.
Kisiel, J.
Lee, J.
Popov, A.
Patel, D. A.
Vijayvargi, A.
Ellis, J.
Joo, K. K.
Khabibullin, M.
Suzuki, Y.
Grassi, M.
Minamino, A.
Svoboda, R.
Malek, M.
Walker, J.
Zalipska, J.
Menjo, H.
Rubbia, A.
Fitton, M.
Rajda, P. J.
Shinoki, M.
Valentino, V.
Tada, M.
Santucci, G.
Horiuchi, S.
Giganti, C.
Mehta, P.
Seo, S. H.
Kotsar, Y.
Vyalkov, M. M.
Holin, A.
Choubey, S.
Studenikin, A. I.
Quiroga, A. A.
Esmaili, A.
Ishino, H.
Bronner, C.
Kobayashi, T.
Bravo-Berguño, D.
Okumura, K.
Radics, B.
Koshio, Y.
Cao, S.
Ishitsuka, M.
Long, K. R.
Sgalaberna, D.
Makida, Y.
Vagins, M. R.
Monrabal, F.
Di Lodovico, F.
Bolognesi, S.
Bose, D.
Kazarian, N.
Kalaczynski, P.
Pinzon Guerra, E.
Esteve, R.
Kataoka, Y.
Ogitsu, T.
Takeuchi, Y.
Stopa, K.
Kano, Y.
Parsa, S.
Asaoka, Y.
Deshmukh, N.
Blaszczyk, F. d. M.
Hastings, N. C.
Quilain, B.
Suzuki, S. Y.
Koga, M.
Litchfield, R. P.
Richards, B.
Feely, M.
Laveder, M.
McCarthy, M.
Tortone, G.
Rondio, E.
Migliozzi, P.
Kwak, K.
Inoue, K.
Przewlocki, P.
Abe, K.
Naseby, C. E. R.
Nakaya, T.
Pronost, G.
Takhistov, V.
Metelko, C.
Bellato, M.
Popov, B.
Rychter, A.
de Perio, P.
Sonoda, Y.
Nakamura, H.
Frankiewicz, K.
Bian, J.
Batkiewicz-Kwasniak, M.
Hill, J.
Nicholls, T.
Yershov, N.
Nakayama, S.
Lagoda, J.
Santos, J. D.
Spisso, B.
Pidcott, C.
Roskovec, B.
Bubak, A.
Tomatani-Sánchez, A. K.
Zsoldos, S.
Izumi, N.
Sinnis, G.
Moharana, R.
Sánchez, M. L.
Bravar, A.
Dunne, P.
Ferrario, P.
Scott, M.
Obrebski, W.
Retiere, F.
Kikec, M.
Dergacheva, A.
Alekseev, I.
Gonin, M.
Gao, J.
Bandac, I.
Hadley, D. R.
Samani, S.
Anthony, L. H. V.
Rott, C.
O'Keeffe, H. M.
Noah, E.
Skrobova, N.
Migenda, J.
Hayato, Y.
Araya, A.
Nakamura, K.
Eklund, L.
Suwa, Y.
Tanaka, H. I.
Leitner, R.
Fedotov, S.
Ryu, D.
Garfagnini, A.
Kowalik, K. L.
De Rosa, G.
King, S.
Xia, J.
Blondel, A.
Kutter, T.
Spradlin, P.
Bernard, L.
Chakraborty, S.
Emery, S.
Ospina, N.
Pastuszak, G.
Bergevin, M.
Catanesi, M. G.
Koch, L.
Kolev, N.
Ziętara, Krzysztof
Jo, H. S.
Nagao, Y.
Lawe, M.
Okamoto, K.
Ballester, F.
Maekawa, Y.
Iwamoto, K.
Cebriàn, S.
Ricciardi, G.
Zaremba, K.
Mueller, Th. A.
Rescigno, M.
Moon, D. H.
Matsubara, T.
Dziewiecki, M.
Herrero, V.
Oyama, Y.
Zito, M.
Cowan, G.
Tanaka, H.
Dealtry, T.
Koerich, L.
Stawarz, Łukasz
Yu, I.
Jenkins, S. J.
Yonenaga, M.
Lavitola, L.
Needham, M.
Calvo-Mozota, J. M.
Buizza Avanzini, M.
Ali, A.
Moriyama, S.
Sanchez, M. C.
Adrich, P.
Thiesse, M.
Tsui, K. M.
Vinning, W. G. S.
Yanagisawa, C.
Kuze, M.
Brown, L.
Sánchez, F.
Wilking, M. J.
Klekotko, A.
Gousy-Leblanc, V.
Lezaun, V.
McElwee, J.
Choi, J. H.
O'Sullivan, L.
Mitra, A.
Takeda, A.
Thompson, L. F.
Tanaka, H. A.
Mijakowski, P.
Kim, J. Y.
Paolone, V.
Sekiya, H.
Nova, F.
Seiya, Y.
Mine, S.
Shan, Z.
Nakano, Y.
Katori, T.
Barbi, M.
Marzec, J.
Rose, H. J.
Posiadala-Zezula, M.
McCauley, N.
Wascko, M. O.
Oshlianskyi, A.
Nugent, J. C.
Martens, K.
Nunokawa, H.
Svirida, D.
Hultqvist, K.
Shaikhiev, A.
Devi, M. M.
Vladisavljevic, T.
Tashiro, T.
Toledo, J.
Vogelaar, R. B.
Izumiyama, S.
Valder, S.
Opis:
Core-collapse supernovae are among the most magnificent events in the observable universe. They produce many of the chemical elements necessary for life to exist and their remnants—neutron stars and black holes—are interesting astrophysical objects in their own right. However, despite millennia of observations and almost a century of astrophysical study, the explosion mechanism of core-collapse supernovae is not yet well understood. Hyper-Kamiokande is a next-generation neutrino detector that will be able to observe the neutrino flux from the next galactic core-collapse supernova in unprecedented detail. We focus on the first 500 ms of the neutrino burst, corresponding to the accretion phase, and use a newly-developed, high-precision supernova event generator to simulate Hyper-Kamiokande's response to five different supernova models. We show that Hyper-Kamiokande will be able to distinguish between these models with high accuracy for a supernova at a distance of up to 100 kpc. Once the next galactic supernova happens, this ability will be a powerful tool for guiding simulations toward a precise reproduction of the explosion mechanism observed in nature.
Dostawca treści:
Repozytorium Uniwersytetu Jagiellońskiego
Artykuł
Tytuł:
Application of a Pulsed Slow-Positron Beam to Low-Density Polyethylene Film
Autorzy:
Hamada, E.
Oshima, N.
Katoh, K.
Suzuki, T.
Kobayashi, H.
Kondo, K.
Kanazawa, I.
Ito, Y.
Tematy:
78.70.Bj
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Powiązania:
https://bibliotekanauki.pl/articles/2024257.pdf  Link otwiera się w nowym oknie
Opis:
A pulsing system for a slow-positron beam was applied to study the region near the surface of low-density polyethylene film using positron-annihilation lifetime measurement. The lifetime and intensity of ortho-positronium near the surface were measured as a function of the incident positron energy (1.6-9.1 keV). The size of intermolecular spaces in the surface region (~ 1500 nm) was larger than that in the bulk region. This tendency was especially strong in the region around 200 nm below the surface. On the other hand, the intensity of ortho-positronium decreased at lower incident positron energies, which was attributed to a decrease in the density of the spur electrons and/or an increase in the number of reemitted positrons from the surface.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 15

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