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Wyszukujesz frazę "Kato, H." wg kryterium: Autor


Wyświetlanie 1-11 z 11
Tytuł:
Development of the Effective Underwater Speaker Sound Modulated by Audible Sound Frequency Range of Large Cetaceans for Avoidance with Ship Collision
Autorzy:
Yamada, H.
Kobayashi, N.
Nakashima, T.
Kato, H.
Powiązania:
https://bibliotekanauki.pl/articles/116934.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Cetaceans
Underwater Speaker (UWS)
Underwater Speaker Sound
Audible Sound Frequency Range
Hydrofoils
Hydroacoustics
Avoidance with Ship Collision
Large Cetaceans
Opis:
The underwater speaker (UWS) has been installed on high speed vessels; hydrofoils (HF) with low-noise during their cruises, to avoid sudden collisions with large cetaceans, while its performance has remained uncertain because of the problem in quality of the produced sound. Thus, we developed a sound source for the UWS by modulating the sound based on the audible range of major large cetaceans so as to increase its utilities. To investigate the audible sound frequency range of cetacean, we tried two procedures, (1) indirect-estimation from relationship between cetaceans audibility and vocalization, and (2) indirect-estimation from measurements on the cochlear basal membrane. We also synthesized the two new sound sources which we can potentially expect an avoidance with large cetaceans. Through several field experiments with deploy the new sounds we reached a tentative conclusion that the new sound was effective in terms of inducing the cetaceans' avoidance reaction and would be also expected to be applied to other low-noise vessels.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 2; 213-217
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variable Temperature STM/STS Investigations of Ag Nanoparticles Growth on Semiconductor Surfaces
Autorzy:
Suto, S.
Czajka, R.
Szuba, S.
Shiwa, A.
Winiarz, S.
Nagashima, H.
Kato, H.
Yamada, T.
Kasuya, A.
Powiązania:
https://bibliotekanauki.pl/articles/2036896.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.37.Ef
68.47.Fg
68.55.Ac
Opis:
We have investigated the growth of Ag nanoparticles deposited on Si(111), H/Si(111)-(1×1) and Bi$\text{}_{2}$Te$\text{}_{3}$ substrates using a variable temperature scanning tunneling microscopy. These substrates are different as regards the model system for cluster and islands growth at the nanometer scale. Ag was evaporated onto the sample mounted at the scanning tunneling microscopy stage in vacuum of 10$\text{}^{-10}$ Torr range during evaporation. The substrates were kept at different temperatures: -150˚C, room temperature, and 300˚C during the deposition process. In general, we have observed 3D growth mode up to several ML coverage. The density of clusters and their size were functions of the substrate's temperature during the deposition process - a higher density and a smaller size at -150˚C were in opposition to the 300˚C results - a lower density and a larger size. Low temperature depositions led to continuous layers above 10 ML coverage but the surface was covered by small Ag clusters of 1-2 nm in heights and 2-3 nm in diameters. The log-log graphs of height and projected diameter of Ag clusters revealed different slopes indicating different growth mechanisms at low and high temperatures. We obtained the value of n=0.25±0.02, typical of the so-called droplet model of cluster growth, only at 300˚C. Scanning tunneling spectroscopy measurements revealed clearly different I-V (and dI/dV vs. bias voltage) curves measured above clusters and directly above the substrate. In discussion, we compared our results to theoretically calculated density of states from other papers, finding conformity for partial density of states.
Źródło:
Acta Physica Polonica A; 2003, 104, 3-4; 289-302
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Repellence Effect of the New Sound for Underwater Speaker of Hydrofoil
Autorzy:
Nakashima, T.
Kobayashi, N.
Yamada, H.
Katsumata, T.
Yoshida, R.
Kato, H.
Okabe, H.
Kawazu, I.
Yanase, Y.
Omine, M.
Terada, M.
Sugioka, H.
Kyo, M.
Powiązania:
https://bibliotekanauki.pl/articles/116522.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Underwater Speaker (UWS)
Hydrofoil
Underwater Speaker Sound
Humpback Whale
New Sound
Cetaceans
Acoustics
Hydroacoustics
Opis:
In order to prevent hydrofoil colliding with cetaceans, the underwater speaker (UWS) has been installed to repel cetaceans. Yamada et al. (2012) analyzed and devised the UWS sound as it fits the cetaceans' acoustic properties to prevent the collision furthermore. The new UWS sound was devised and synthesized by Yamada et al. (2015) with expectation of avoiding collision with large cetaceans (Patent applied for, JP2014-171411). In this research project, the new UWS sound was investigated by the playback experiment on humpback whale (Megaptera novaeangliae) and by sighting survey in the actual hydrofoil shipping service route. As a result, a physiological and behavioral change of the humpback whale was observed in the playback experiment of the new UWS sound, and the chance of hydrofoil encountering cetaceans of the new UWS sound was smaller than that of the previous UWS sound. Therefore, the improvement of the new UWS sound was confirmed. Lastly, we wish this research project would contribute toward the safer cruise of hydrofoil in the future.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 2; 207-211
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-Ray Topographic Study of a Homoepitaxial Diamond Layer on an Ultraviolet-Irradiated Precision Polished Substrate
Autorzy:
Kato, Y.
Umezawa, H.
Shikata, S.
Powiązania:
https://bibliotekanauki.pl/articles/1197907.pdf
Data publikacji:
2014-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.72.-y
81.05.ug
Opis:
Suitable techniques for the growth of high-quality single-crystal diamond are needed in order to use single-crystal diamond in power devices. Because the ion plantation technique cannot be used for diamond doping, a drift layer and a conduction layer for a diamond power device were grown by chemical vapor deposition. An important challenge in this field is to reduce the dislocation density in the epitaxial layer. The dislocation density was found to increase during the chemical vapor deposition process. Because a defective surface is one cause of increased dislocation density, the use of a UV-polished substrate having no scratches due to mechanical polishing was investigated.
Źródło:
Acta Physica Polonica A; 2014, 125, 4; 969-971
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effects of Local Cooling on Thermophysiological Response in Participants Wearing Dust-Free Garments
Autorzy:
Kwon, O. K.
Kwon, A. H.
Kato, M.
Hayashi, C.
Tokura, H.
Powiązania:
https://bibliotekanauki.pl/articles/90860.pdf
Data publikacji:
1998
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
dust-free garment
frozen gel strip
skin temperature
heart rate
clothing microclimate
odzież bezpyłowa
temperatura ciała
obciążenie cieplne
Opis:
This study was designed to find the effects of two kinds of dust-free garments with (A) and without (B) frozen gel strip (FGS), and half-naked clothing (brassiere and shorts; C) on thermophysiological parameters and on temperature and humidity within clothing. The heart rate, rectal, and skin temperatures as well as sweat rate and clothing microclimate were measured during 140 min in 9 healthy females. Inquiries were also made into the subjective rating of thermal, humidity, and comfort sensations. The main findings in our experiments are as follows: (a) Physiological parameters such as rectal and skin temperatures (chest and forehead), heart rate, and sweat rate were clearly lowest in garb C, intermediate in garb A, and highest in garb B throughout the experiment; (b) Temperature and humidity within clothing were lower in garb A than in garb B; (c) More than half of the 9 participants decreased thermal sensation by wearing garb A. These results suggest that the usage of FGS could improve the heat load in lightly working participants wearing dust-free garments.
Źródło:
International Journal of Occupational Safety and Ergonomics; 1998, 4, 1; 57-67
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the breakthrough phenomena during heavy metal elution from a column packed with municipal waste incineration ash
Autorzy:
Zhang, W.
Yang, Y.
Suganuma, H.
Kato, S.
Suzuki, S.
Kojima, T.
Powiązania:
https://bibliotekanauki.pl/articles/206904.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
calcium compounds
dissolution
heavy metals
leaching
particle size
związki wapnia
rozpuszczanie
metale ciężkie
ługowanie
wielkość cząstek
Opis:
At some point during acid leaching column tests of heavy metals from municipal waste incineration ash, sudden and rapid elution of harmful elements was observed which was called the breakthrough (BT) phenomena. The mechanism was elucidated from the results of measurement of elemental and particle size distribution in the column and batch leaching tests as follows. At the first stage of experimental runs, CaCO3 was dissolved in acidic solution and pH profile along the bed is formed. Some of the minor elements of Zn and Al dissolved by acid at the upper part of the column are precipitated at bottom of the column, leading to the reduction of flow rate of the leachate solution. After leachate pH becomes low by the termination of dissolution of Ca, these deposits are dissolved and thus, the flow rate increases. Most of the trace elements behave as such, which causes the increase of harmful element concentrations in the eluate. Some drastic concentration increase of harmful elements in leachate may occur even after the long period of pseudo stable dissolution behavior in the land-fill site.
Źródło:
Environment Protection Engineering; 2018, 44, 3; 63-78
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photoluminescence Analysis of Oxygen Precipitation around Small-Angle Grain Boundaries in Multicrystalline Silicon Wafers
Autorzy:
Kato, G.
Tajima, M.
Okayama, F.
Tokumaru, S.
Sato, R.
Toyota, H.
Ogura, A.
Powiązania:
https://bibliotekanauki.pl/articles/1382111.pdf
Data publikacji:
2014-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.55.Ap
61.72.Qq
82.80.Rt
88.40.jj
Opis:
We have investigated the correlation between deep-level photoluminescence and the density of small-angle grain boundaries in multicrystalline Si. A deep-level photoluminescence component around 0.87 eV, which we previously ascribed to oxygen precipitates, became lower and higher in the region with high and low density of small-angle grain boundaries, respectively. This can be explained by the differences in the availability of oxygen atoms around respective small-angle grain boundaries. We performed focused ion beam time-of-flight secondary ion mass spectroscopy on special points emitting extremely strong 0.87 eV emission, and detected a clustered area of $\text{}^16O¯$. This is strong evidence for the idea that the 0.87 eV band is due to oxygen precipitates.
Źródło:
Acta Physica Polonica A; 2014, 125, 4; 1010-1012
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photo-Induced Structural Changes at a Surface οf Organic Single Crystals Observed by Vibrational Sum Frequency Generation Spectroscopy
Autorzy:
Fukumoto, K.
Fukazawa, N.
Ishikawa, T.
Koshihara, S.
Yamamoto, H.
Kato, R.
Onda, K.
Powiązania:
https://bibliotekanauki.pl/articles/1489956.pdf
Data publikacji:
2012-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.40.Me
68.35.Rh
68.35.Ja
Opis:
Phase transitions from insulator to metal induced by thermal excitation and by photo-irradiation at the surface of β'-(BEDT-TTF)(TCNQ) are investigated using vibrational sum frequency generation spectroscopy. The results are compared with linear reflectivity measurements which detect the information mainly from bulk. IR absorption spectra of $a_{g}$ vibrational modes of TCNQ induced by the dimerization are observed using vibrational sum frequency generation spectroscopy, and its intensity is found to become smaller by thermal excitation indicating the transition to the metal phase. Time-dependent degree of dimerization is also observed by pump-probe experiments with almost the same statistics as the static measurements. On the other hand, in the reflectivity experiments, the reduction of dimerization is also observed by elevating the temperature, however, the spectral shapes are deformed for the time-resolved measurements. These results imply that the different dynamics occur at the surface and in the bulk.
Źródło:
Acta Physica Polonica A; 2012, 121, 2; 313-315
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of renewable energy in the form of methane via electrolytic hydrogen generation
Zastosowanie odnawialnej energii w formie metanu na drodze elektrolitycznej produkcji wodoru
Autorzy:
Hashimoto, K.
Kumagai, N.
Izumiya, K.
Takano, H.
Żabiński, P. R.
El-Moneim, A. A.
Yamasaki, M.
Kato, Z.
Akiyama, E.
Habazaki, H.
Powiązania:
https://bibliotekanauki.pl/articles/350838.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energia odnawialna
podaż metanu
recykling CO2
elektrolityczne wytwarzanie wodoru
gaz syntezowy
wyczerpanie paliwa
przetrwanie ludności świata
renewable energy
methane supply
CO2 recycling
electrolytic hydrogen generation
CO2 methanation
syngas methanation
fuel depletion
survival of world population
Opis:
Extrapolation of world energy consumption from 1990 to 2010 indicates the complete exhaustion of world reserves of oil, natural gas, uranium and coal by 2040, 2043, 2046 and 2053, respectively. For the survival of all people in the whole world, intermittent and fluctuating electricity generated from renewable energy should be supplied in the form of usable fuel to all people in the whole world. We have been working on research and development of global carbon dioxide recycling for the use of renewable energy in the form of methane via electrolytic hydrogen generation using carbon dioxide as the feedstock. We created energy-saving cathodes for hydrogen production, anodes for oxygen evolution without chlorine formation in seawater electrolysis, and catalysts for methanation of carbon dioxide and built pilot plants of industrial scale. Recent advances in materials are described. Industrial applications are in progress.
Ekstrapolacja światowego zużycia energii z lat 1990-2010 wskazuje, że całkowite wyczerpanie światowych zasobów ropy naftowej nastąpi w 2040 roku, gazu ziemnego w 2043 roku, uranu w 2046 roku a węgla w 2053 roku. Dla przetrwania ludzkości na całym świecie energia elektryczna powinna być generowana z odnawialnego zródła w formie paliwa dostępnego dla kazdego. Opracowano technologie globalnego recyklingu dwutlenku wegla i zastosowania metanu jako formy odnawialnej energii generowanej poprzez uwodornienie CO2 wodorem produkowanym podczas elektrolizy wody morskiej. Opracowano energooszczedne katody do produkcji wodoru, anody do produkcji tlenu bez towarzyszącej temu emisji gazowego chloru podczas elektrolizy wody morskiej oraz katalizatory stosowane w procesie uwodornienia dwutlenku węgla. Wybudowano również pilotażowa instalacje w skali przemysłowej. Praca opisuje ostatnie postępy w industrializacji procesu.
Źródło:
Archives of Metallurgy and Materials; 2013, 58, 1; 231-239
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
R&D of novel medicinal materials for curing cancer: sugar modified Gd-DTPA MRI contrast agents and phospha sugar anti-cancer agents
Autorzy:
Yamashita, Y.
Yamashita, M.
Fujie, M.
Suyama, K. A. T.
Ito, S.
Reddy, V. K.
Yamada, M.
Ogawa, K.
Ozaki, N.
Nakamura, S.
Aoki, T.
Yu, G.
Aoshima, K.
Kato, T.
Kamikage, N.
Kiyofuji, K.
Takehara, Y.
Sakahara, H.
Takayanagi, H.
Oshikawa, T.
Laurent, S.
Burtea, C.
Van der Elst, L.
Muller, R. N.
Powiązania:
https://bibliotekanauki.pl/articles/385218.pdf
Data publikacji:
2009
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
MRI contrast agent
sugar-ball-dendrimer
Gd (III)-DTPA complex
phospha sugars
phospholanes
anticancer agent
tumor
Opis:
Novel Sugar Dendritic Gd-DTPA Complexes for MRI Contrast Agents were prepared and evaluated by in vitro and in vivo methods. The sugar dendritic MRI contrast agents have a good blood vesse pool character, and draw blood vessels and liver cancer remarkably clearer than the clinically using Gd-DTPA. Phospha sugar derivatives or phosphorus heterocyclic derivatives provided by functional groups such as epoxide, bromide, etc., were prepared and evaluated by MTT in vitro method. These phospha sugar derivatives showed excellent activities against leukemia cells as well as solid cancer cells in fashions of (i) higher activity, (ii) wider spectra, (iii) higher selectivity and specificity distingushing healthy and cancer cells, etc., compared with the molecular targeting chemotheraputic anti-cancer agent, Gleevec.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 80-83
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-11 z 11

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