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    Wyświetlanie 1-15 z 15
    Tytuł:
    Development of environmental purification materials with smart functions
    Autorzy:
    Yamada, H.
    Watanabe, Y.
    Tamura, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/146231.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    apatite
    environmental purification
    layered double hydroxide
    nanocomposite
    nuclear waste
    zeolite-LTA
    Opis:
    For an environmental-friendly sustainable society, the global environmental problems should be solved. Here we outline our recent results of environment purification materials with smart functions. For the effective adsorbent for remediation process, zeolite coated with layered double hydroxide (LDH) was prepared by the precipitation of LDH on zeolite-LTA under hydrothermal treatment. This multifunctional material has a possible application for simultaneous uptake of harmful cations and anions, and minimizes environmental pollution during municipal and industrial water management. For novel material for the nuclear waste management, zeolite with hydroxyapatite layers on its surface was obtained by a hydrothermal method on the basis of the cation exchange of Ca2+ in zeolite for NH4+ in solution. The novel nanocomposite is an ideal material for adsorbing and fixing radioactive elements for geological time-scale.
    Źródło:
    Nukleonika; 2006, 51,suppl.1; 61-67
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spatial variability of uncultivated soils in derived savanna
    Autorzy:
    Obalum, S.E.
    Oppong, J.
    Igwe, C.A.
    Watanabe, Y.
    Obi, M.E.
    Powiązania:
    https://bibliotekanauki.pl/articles/25426.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    The spatial variability of some physicochemical properties of topsoils/subsoils under secondary forest, grassland fallow, and bare-soil fallow of three locations was evaluated. The data were analyzed and described using classical statistical parameters. Based on the coefficient of variation, bulk density, total porosity, 60-cm-tension moisture content, and soil pH were of low variability. Coarse and fine sand were of moderate variability. Highly variable soil properties included silt, clay, macroporosity, saturated hydraulic conductivity, organic matter concentration, and cation exchange capacity. Overall, soil pH and silt varied the least and the most, respectively. Relative weighting showed that location dominantly influenced the soil variability, except for soil porosity and organic matter concentration influenced mostly by land use. Most of the soil data were normally distributed; others were positively skewed and/or kurtotic. The minimum number of samples (at 25 samples ha-1) required to estimate mean values of soil properties was highly soil property-specific, ranging from 1 (topsoil pH-H2O) to 246 (topsoil silt). Cation exchange capacity of subsoils related fairly strongly with cation exchange capacity of topsoils (R2 = 0.63). Spatial variability data can be used to extrapolate dynamic soil properties across a derived-savanna landscape.
    Źródło:
    International Agrophysics; 2013, 27, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Puddling intensity for late-season sawah systems based on soil hydrophysical conditions and rice performance
    Autorzy:
    Obalum, S.E.
    Watanabe, Y.
    Igwe, C.A.
    Obi, M.E.
    Wakatsuki, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/26457.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    puddling intensity
    late-season sawah system
    soil condition
    hydrophysical condition
    rice
    grain yield
    Oryza sativa
    performance
    Opis:
    Lowland sawah farmers often puddle to improve soil hydrophysical conditions for rice, but the puddling intensity beyond which no extra yield increases occur is unknown. Agro- nomic effects of six mechanical puddling intensities were assessed in three Nigerian inland-valley bottoms. All puddled plots, irrespec- tive of intensity, produced similar effects at all three locations. At 10 days after transplanting, soil bulk density of all puddled plots re- presented mean decreases relative to control plots of about 22.4, 15.8, and 31.7% at Akaeze, Adani, and Ejeti, respectively. Soil bulk density and moisture content upon saturation were similar during 40-120 days after transplanting. All puddled plots consistently showed taller plants and greater tillering than control plots only at Ejeti. Grain yields were similar among treatments in Akaeze and Adani (mean, 3.71 and 6.42 Mg ha -1 , respectively), but one-pass puddling yielded numerically highest in both locations. At Ejeti, grain yields followed the trend for plant growth, with mean values of 4.36 and 1.81 Mg ha -1 for puddled and control plots, respecti- vely. One-pass puddling may be sufficient for sawah rice grown late particularly in less humid environments.
    Źródło:
    International Agrophysics; 2014, 28, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An analysis of a multidimensional dataset of an epidemic study using soft computing tools - a pilot study
    Autorzy:
    Handri, S.
    Nomura, S.
    Irfan, A. C.M.
    Fukuda, S.
    Yamano, E.
    Watanabe, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/333077.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
    Tematy:
    epidemiologia
    analiza regresji logistycznej
    epidemiology
    logistic regression analysis
    feature set selection
    K-NN analysis
    Opis:
    Two contrasting approaches toward an epidemic study were illustrated as a pilot study; the regression analysis which is rather conventional methodology used in the past/present epidemic studies, and the other is the classifier analysis which is in the soft computing toolbox. The dataset we used for this study is obtained from a part of a cohort study which principally focused on a fatigue syndrome of the elementary and junior high school educates. In the classifier analysis we employed a major supervised machine-learning algorithm, K-Nearest Neighbour (K-NN), coupled with Principal Component Analysis (PCA). As a result, the performance that was found by cross validation method in the classifier analysis provides better results than that of the regression analysis. Finally we discussed the availability of both analyses with referring the technical and conceptual limitation of both approaches.
    Źródło:
    Journal of Medical Informatics & Technologies; 2009, 13; 107-110
    1642-6037
    Pojawia się w:
    Journal of Medical Informatics & Technologies
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An approximation algorithm for multi-unit auctions: numerical and subject experiments
    Autorzy:
    Takahashi, S.
    Izunaga, Y.
    Watanabe, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/406625.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    multi-unit auctions
    approximation algorithm
    experiment
    algorytm aproksymacyjny
    eksperyment
    Opis:
    In multi-unit auctions for a single item, the Vickrey–Clarke–Groves mechanism (VCG) attains allocative efficiency but suffers from its computational complexity. Takahashi and Shigeno thus proposed a greedy based approximation algorithm (GBA). In a subject experiment there was truly a difference in efficiency rate but no significant difference in seller’s revenue between GBA and VCG. It is not clear in theory whether each bidder will submit his or her true unit valuations in GBA. We show, however, that in a subject experiment there was no significant difference in the number of bids that obey “almost” truth-telling between GBA and VCG. As for individual bidding behavior, GBA and VCG show a sharp contrast when a human bidder competes against machine bidders; underbidding was observed in GBA, while overbidding was observed in VCG. Some results in a numerical experiment are also provided prior to reporting those observations.
    Źródło:
    Operations Research and Decisions; 2018, 28, 1; 95-115
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of optimal cyclic uniaxial stretches for stem cell-to-tenocyte differentiation under a wide range of mechanical stretch conditions by evaluating gene expression and protein synthesis levels
    Autorzy:
    Morita, Y.
    Watanabe, S.
    Ju, Y.
    Xu, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/951825.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    hBMSC
    differentiation
    mechanical stretch
    tenocyte
    różniczkowanie
    wydłużanie
    Opis:
    We examined optimal cyclic uniaxial stretches for stem cell-to-tenocyte differentiation by applying a wide range of cyclic mechanical stimuli. Human bone marrow mesenchymal stem cells (hBMSCs) were subjected to three types of cyclic elongation of 5%, 10%, or 15% at a cyclic frequency of 1 Hz for 24 h or 48 h, and differentiation into tenocytes was assessed by two methods: real-time polymerase chain reaction determination of gene expression levels and western blotting analysis of protein expression levels. The gene expression levels of the differentiation markers type I collagen (Col I), type III collagen (Col III), tenascin-C (Tnc), and scleraxis (Scx), all of which are constituents of tendon tissue, were increased when cells were exposed to 10% stretching stimulation. The levels of Col I and Tnc protein synthesis levels were also higher in the cells with 10% stretching stimulation than in those subjected to other stimuli. The results indicated that 10% stretching stimulus was efficient to induce the differentiation of hBMSCs into tenocytes. In addition, the changes in gene and protein expression levels were strongly correlated with cell orientation angle. The results presented here suggest that mesenchymal stem cell-to-tenocyte differentiation is strongly associated with cumulative elongation load on the cells. This work provides novel insights into the differentiation of tenogenesis in a strain-induced environment and supports the therapeutic potential of hBMSCs.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2013, 15, 3; 71-79
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pleistocene non-passeriform landbirds from Shiriya, northeast Japan
    Autorzy:
    Watanabe, J.
    Matsuoka, H.
    Hasegawa, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/21547.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Located on the eastern margin of Eurasia, the Japanese Archipelago hosts a unique modern fauna of terrestrial vertebrates including landbirds which show a high proportion of endemic species/subspecies. Despite its potential importance in taxonomy and biogeography, the Pleistocene landbird fossil record has been scarce on Japanese islands, providing little information on the history of the unique fauna in the region. In this study, fossil remains of non-passeriform landbirds from the Middle–Late Pleistocene (Marine Isotope Stages [MIS] 9 and 5e) of Shiriya, northernmost Honshu Island, Japan, are revised with extensive osteological comparisons. As a result, the presence of at least six non-passeriform landbird species, represented by 71 specimens, was confirmed: Syrmaticus sp., Coturnicini gen. et sp. indet., Columbidae gen. et sp. indet., Apus sp., Haliaeetus sp., and Accipitridae gen. et sp. indet. The Shiriya paleoavifauna is the first substantial Pleistocene landbird fauna reported from the central Japanese islands so far, and suggests that the overall landbird fauna in northern Honshu in the last interglacial period (MIS 5e) was not drastically different from the present one, in contrast to the presence of several extinct land mammals and seabirds in the local fauna. The occurrence of Syrmaticus despite the supposedly colder climate in that time than today suggests that the distribution of modern S. soemmerringii might not be totally defined by climatic factors, but probably affected by a biogeographic barrier at the strait between Honshu and Hokkaido islands.
    Źródło:
    Acta Palaeontologica Polonica; 2018, 63, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A simple local navigation system inspired by hippocampal function and its autonomous mobile robot implementation
    Autorzy:
    Miki, T.
    Hayashi, H.
    Goto, Y.
    Watanabe, M.
    Inoue, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/384203.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    human-like local navigation
    sequence learning
    entorhino-hippocampal system
    autonomous mobile robot
    Opis:
    We propose a practical simple local navigation system inspired by the sequence learning mechanism of the entorhino-hippocampal system. The proposed system memorizes a route as sequences of landmarks in the same way humans do. The proposed local navigation system includes a local route memory unit, landmark extraction unit, and learning-type matching unit. In the local route memory unit, the concept of the sequence learning mechanism of the entorhino-hippocampal system is implemented using a fully connected network, while a sequence of landmarks is embedded in the connection matrix as the local route memory. This system has two operation modes: learning and recall modes. In learning mode, a sequence of landmarks, i.e. a local route, is represented by enhanced loop connections in the connection matrix. In recall mode, the system traces the stored route comparing current landmarks with the stored landmarks using the landmark extraction and learning-type matching units. The system uses a prospective sequence to match the current landmark sequence with the recalled one. Using a prospective sequence in the route comparison allows confirmation of the correct route and deals with any slight change in the current sequence of landmarks. A certainty index is also introduced for judging the validity of the route selection. We describe a basic update mechanism for the stored landmark sequence in the case of a small change in the local route memory. The validity of the proposed system is confirmed using an autonomous mobile robot with the proposed navigation system.
    Źródło:
    Journal of Automation Mobile Robotics and Intelligent Systems; 2010, 4, 2; 31-38
    1897-8649
    2080-2145
    Pojawia się w:
    Journal of Automation Mobile Robotics and Intelligent Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of backfilling material using fly ash by application of chemical injection
    Podawanie materiału podsadzkowego z popiołów lotnych z iniekcją chemiczną
    Autorzy:
    Shimada, H.
    Yoshida, Y.
    Senda, T.
    Maeda, Y.
    Sasaoka, T.
    Fujita, S.
    Matsui, K.
    Watanabe, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/970949.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    lubricant
    backfilling
    deep strata
    pipe jacking
    fly ash utilization
    chemical injection
    smar
    podsadzka
    głębokie warstwy
    mocowanie rurociągu
    utylizacja popiołów lotnych
    iniekcja chemiczna
    Opis:
    Lubrication can effectively reduce the needed thrust if a discrete layer of lubricant is maintained between a pipe and the excavated soil. A lower frictional force allows greater jacking lengths to be achieved. The reduction of frictional stress around the pipe strongly affects the efficiency of lubrication injection. The lubricant must be designed to form a layer in the surrounding soil, be pressurized to overcome ground water pressure and stabilize the over-cutting area. The lubricant should also fill the over-cutting area completely to minimize surface settlement. However, for a commercial lubricant to be effective, it has been suggested that ingredients such as sodium and potassium be eliminated. As a result, in order that a lubricant does not lose its function as a support against the overburden pressure of an over-cutting area and to enable a reduction in thrust, a higher quality lubricant which can overcome these problems must be developed as soon as possible. In this paper, in order to examine the characteristics and behaviour of a material developed as a lubricant and backfilling for a deeper strata excavation system such as a pipe jacking, a fundamental investigation is performed and the various results are discussed.
    Smarowanie może skutecznie zmniejszyć wymagany nacisk jeśli warstwa smaru jest utrzymana pomiędzy rurą a urobkiem. Niższa siła tarcia pozwala na osiągnięcie większych długości podczas mikrotunelingu. Redukcja naprężeń wokół rury silnie wpływa na efektywność wprowadzania smaru. Smar musi być zaprojektowany w taki sposób, aby tworzyć warstwę w otaczającej glebie, musi być wtłaczany pod ciśnieniem aby pokonać nacisk wód gruntowych oraz stabilizować drążoną powierzchnię. Smar powinien również wypełniać drążoną powierzchnię aby całkowicie zminimalizować osiadanie powierzchni. Jednakże, aby smar komercyjny był efektywny zdecydowano się na eliminację takich składników jak sód czy potas. W efekcie, aby smar nie stracił swojej funkcji jako wsparcie przeciw przed naciskiem nadkładu powierzchni drążonej i uaktywnić redukcję parcia, należy jak najszybciej opracować wyższej jakości smar, który poradzi sobie z wyżej wymienionymi problemami. W celu sprawdzenia charakterystyki i zachowania się materiału stanowiącego smar oraz wypełnienie dla systemu wykopu głębszych warstw jak w przypadku mikrotunelingu, przeprowadzono badania, których wyniki i omówienie znajdują się w poniższym referacie.
    Źródło:
    Inżynieria Mineralna; 2013, R. 14, nr 2, 2; 37-42
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Focused Ion Beam Imaging of Defects in Multicrystalline Si for Photovoltaic Application
    Autorzy:
    Miyamura, Y.
    Sekiguchi, T.
    Chen, J.
    Li, J.
    Watanabe, K.
    Kumagai, K.
    Ogura, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1198415.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.-a
    61.85.+p
    61.72.Ff
    Opis:
    We demonstrate the imaging of the extended defects in Si materials using a focused ion beam instrument. Since Ga-ion beam has small penetration depth and high channeling character compared with electron beam, the secondary electron signal of focused ion beam is more sensitive to the surface morphology and crystallinity. We have tried to use this secondary electron imaging of focused ion beam for observation of various extended defects in Si materials for photovoltaic and semiconductor devices. As for the texture of multicrystalline Si, some grains are imaged darker than the others. It suggests that the crystal orientation gives different channeling effect on the primary Ga-ion beam, resulting in the different secondary electron yield. The grain boundaries and lineage in multicrystalline Si are shown as bright lines and patterns in the image. Although it may reflect the surface morphologies, these contrasts may be attributed to the channeling contrast due to lattice displacement or distortion. The contrast mechanism of FIB imaging is discussed.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4; 991-993
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tem Observation Of Age-Hardening Precipitation In Mg-Gd-Y Alloys As Different Gd/Y Ratio
    Zastosowanie mikroskopii TEM do obserwacji wydzieleń po utwardzaniu wydzieleniowym w stopach Mg-Gd-Y o różnych stosunkach Gd/Y
    Autorzy:
    Matsuoka, Y.
    Watanabe, K.
    Nakamura, J.
    Lefebvre, W.
    Saikawa, S.
    Ikeno, S.
    Matsuda, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/351744.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Mg-RE alloy
    precipitation behavior
    TEM
    HAADF-STEM
    stop Mg-RE
    zachowanie wydzieleń
    transmisyjna mikroskopia elektronowa (TEM)
    Opis:
    In this study, the early stage of aging in Mg-Gd-Y alloys has been observed by transmission electron microscopy (TEM), high angle annular dark field – scanning transmission electron microscopy (HAADF-STEM) and calculations of images and electron density and bond overlap population (BOP) by first principal to understand the origin of precipitation in this alloy. The small hexagon of 0.37 nm is the first precipitate in this alloy, and this is the evidence of short range ordering of D019 structure. This is referred as the pre β”-phase. In the peak aged condition, β’ phase with bco structure was mainly observed.
    W pracy przedstawiono mikroskopowe obserwacje TEM wczesnego etapu starzenia stopów Mg-Gd-Y. Ponadto badania prowadzono z użyciem skaningowej transmisyjnej mikroskopii elektronowej. Wykorzystano zjawisko niekoherentnego rozpraszania w ciemnym polu i materiał obrazowano przy pomocy detektora pierścieniowego, który zbiera elektrony rozproszone pod dużymi kątami (HAADF-STEM). Przeprowadzono także analizę obrazów, obliczenie gęstości elektronowej i ilości nakładających się wiązań w celu zrozumienia źródła wydzieleń w ww. stopie. Pierwszym wytrąceniem w stopie jest mały sześciokąt o wielkości 0,37 nm, a dowodem tego jest uporządkowanie krótkiego zasięgu struktury D019.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2A; 971-972
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The bacteriostatic effect of erythritol on canine periodontal disease–related bacteria
    Autorzy:
    Tochio, T.
    Makida, R.
    Fujii, T.
    Kadota, Y.
    Takahashi, M.
    Watanabe, A.
    Funasaka, K.
    Hirooka, Y.
    Yasukawa, A.
    Kawano, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/16539083.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    erythritol
    canine
    periodontal disease
    Porphyromonas gulae
    Porphyromonas cangingivalis
    Fusobacterium
    oral microbiota
    Opis:
    Erythritol helps both prevent and improve periodontal disease and is therefore widely used for dental care in humans. However, only a few studies have investigated the effects of erythritol on periodontal disease in animals. We hypothesized that erythritol could be used to prevent and improve periodontal disease also in canines and investigated the effects of erythritol on canine periodontal disease–related pathogenic bacteria using both in vitro and in vivo methods. The effect of erythritol on the proliferation of Porphyromonas gulae, which is reportedly associated with canine periodontal disease, was investigated in vitro. In addition, a 4-week intervention trial using an external gel preparation containing 5% erythritol was performed in canines with mild periodontal disease; changes in the microbiota around periodontal lesions were investigated using next-generation sequencing and bioinformatics analysis. The growth of P. gulae was significantly suppressed by erythritol in vitro. In the intervention study, the Shannon index, an indicator of the species distribution α-diversity, and the occupancy of several canine periodontal disease – related bacteria ( P. gulae, P. cangingivalis) were significantly decreased in periodontal lesions. Based on the results of in vitro and in vivo studies, we conclude that, as in humans, erythritol has bacteriostatic effects against periodontal disease – related bacteria in canines.
    Źródło:
    Polish Journal of Veterinary Sciences; 2022, 25, 1; 75-82
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic characteristics measurements of a force transducer against small and short-duration impact forces
    Autorzy:
    Djamal, M.
    Watanabe, K.
    Irisa, K.
    Prayogi, I. A.
    Takita, A.
    Yamaguchi, T.
    Fujii, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/221311.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dynamic force
    impulse response
    force transducer
    force sensor
    inertial force
    optical interferometer
    Opis:
    A method for evaluating the dynamic characteristics of force transducers against small and short-duration impact forces is developed. In this method, a small mass collides with a force transducer and the impact force is measured with high accuracy as the inertial force of the mass. A pneumatic linear bearing is used to achieve linear motion with sufficiently small friction acting on the mass, which is the moving part of the bearing. Small and short-duration impact forces with a maximum impact force of approximately 5 N and minimum half-value width of approximately 1 ms are applied to a force transducer and the impulse responses are evaluated.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 1; 59-66
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    THz Double-Grating Gate Transistor Detectors in High Magnetic Fields
    Autorzy:
    But, D.
    Dyakonova, N.
    Coquillat, D.
    Teppe, F.
    Knap, W.
    Watanabe, T.
    Tanimoto, Y.
    Boubanga Tombet, S.
    Otsuji, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1409591.pdf
    Data publikacji:
    2012-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.57.Kp
    85.30.Tv
    73.43.Qt
    Opis:
    Double-grating-gate field-effect transistors have a great potential as terahertz detectors. This is because the double grating gate serves not only for carrier density tuning but also as an efficient THz radiation coupler. In this paper, we present characterization of these transistors using high magnetic fields. Low and high magnetic field data are used to determine the electron mobility and electron concentration, respectively, in different parts of the transistor channel.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 6; 1080-1082
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-15 z 15

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