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Wyświetlanie 1-17 z 17
Tytuł:
Layout design for flexible machining systems in FCIPS and convertibility to CPS module in smart factory
Autorzy:
Ito, Y.
Powiązania:
https://bibliotekanauki.pl/articles/99727.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
smart factory
CPS module
FCIPS
FMC
function-integrated machine tools
Opis:
Although being not in accordance with the original concept proposed in the “Industrie 4.0”, the smart factory has been gradually applied to the practice. In contrast, we can observe that nearly all discourses, suggestions and discussions have been carried out without considering the convertibility of flexible manufacturing in FCIPS (Flexible Computer-Integrated Production Structure), which is the utmost leading facility within the industrial nation, to the CPS (Cyber Physical Systems) module in the smart factory. Admitting the powerful potentiality of the smart factory, at crucial issue is to discuss to what extent and how the technological and human resources so far accumulated in FCIPS are available for the smart factory. This paper proposes, first, the conceptual drawing of the smart factory on the basis of the concept of FCIPS, and then suggests the similarity of both the concepts. In fact, the smart factory consists of cloud computing, information communication network and CPS modules, whereas FCIPS consists of CIM, information communication network and a group of FMCs (Flexible Manufacturing Cells). Then, the paper describes the present and near future perspectives of the CPS module and FMC, especially placing the stress on machining, and asserts the convertibility of FMC for “One-off Production with Keen Machining Cost” to the CPS module. Finally, the paper summarizes the research and engineering development subjects in FCIPS and the smart factory necessary to be investigated hereafter together with detailing one leading subject, i.e. methodology to incorporate the human-intelligence into CIM.
Źródło:
Journal of Machine Engineering; 2017, 17, 4; 5-28
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Position paper - fundamental issues in self-excited chatter in turning. Appendix – research into process damping by Altintas et al
Autorzy:
Ito, Y.
Powiązania:
https://bibliotekanauki.pl/articles/100059.pdf
Data publikacji:
2013
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
turning
cutting
parametric vibration
chatter
stability
Opis:
Although observing a considerable number of new interesting behavior in dynamic states of machining, nearly all researches into the chatter vibration have been based on those conducted by Tobias, Tlusty and Merritt. In fact, we have established myriad remedies for the chatter suppression on the strength of their achievements; however, some crucial issues remain still in uncertainties, e.g., validity of penetration effects, definition duly what are the essential features of the chatter vibration. This position paper describes the facing problems of the chatter vibration in detail, aiming at the establishment of a generalized chatter loop. By this chatter loop, we may unveil synthetically the deterioration and improvement of the stability chart by all the influencing attributes, such as forced vibration and non-linearity within the machine-tool-work system.
Źródło:
Journal of Machine Engineering; 2013, 13, 3; 7-25
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A proposal of modular design for localized globalization era
Autorzy:
Ito, Y.
Powiązania:
https://bibliotekanauki.pl/articles/99442.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
modular design
manufacturing culture
localized globalization
conversion methodology
Opis:
In localized globalization era, it appears that the modular design enables something new to be played, and thus at burning issue is the reconsideration of to what extent the modular design is applicable. To delve into a desirable modular design in not distant future, this paper describes first the present perspective including some facing problems and milestones in the developing history of the modular design. Then, the paper shows some applications of the modular design to other industrial spheres, ranging from automobile, through food processing plant, to submarine. On the strength of such awareness and also in consideration of characteristic features of the manufacturing environment in future, proposed is a new concept for modular design, in which primary concerns are two leading attributes, i.e., functionality-related, and also culture- and mindset-related attributes. These two should be duly converted into the quantified design specifications, and we must conduct the " One-to-One " conversion from functionality to structural configuration, and also conversion from the uncertain attribute to the quantified factor. Of note, the forerunning research is reviewed.
Źródło:
Journal of Machine Engineering; 2011, 11, 3; 21-35
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative research into marketability reinforcement in conventional machining center of China, India, Japan, Korea and Taiwan-makes
Autorzy:
Tandon, P.
Ito, Y.
Powiązania:
https://bibliotekanauki.pl/articles/99851.pdf
Data publikacji:
2011
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
conventional machining center
marketing strategies
product strategies
technological qualification
mind map
Opis:
This paper describes the results of a comparative research into the marketing and product strategies for the conventional MCs of China, India, Japan, Korea and Taiwan-makes. In this work, information from conventional MC manufacturers of these countries is collected on the spot and with the help of a questionnaire to identify the relevant strategies for differentiation. The parameters considered are the target customers, date of delivery, sale price, features of operability, design attributes, after sales service, motivation to purchase, target market segment. Based on these parameters, mind maps are drawn. The differences in the strategies among Japan, Korea and Taiwan manufacturers is that although most of the manufacturers in these countries have employed in-house design and assembly systems, and strongly rely on supply chain management, still the Korean manufacturers maintain the competitiveness through cheaper sales price and shorter delivery time, the Taiwanese manufacturers focus on current customers through cheap pricings but do not pay proper attention to business-oriented-enterprise management; while the Japanese manufacturers are capable of introducing directly opposite attributes in the product design. The Chinese and Indian manufacturers produce machines that are cost effective and focus on the inland market. The delivery time is long due to obsolete manufacturing facilities and sparse competition.
Źródło:
Journal of Machine Engineering; 2011, 11, 3; 58-71
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Polymerization of Epoxy Resins Studied by Positron Annihilation
Autorzy:
Suzuki, T.
Hayashi, T.
Ito, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2007966.pdf
Data publikacji:
1999-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
83.80.Cq
Opis:
The polymerization process of epoxy resins (bisphenol-A dicyanate) was studied using positron-annihilation lifetime spectroscopy. The polymerization from monomer to polymer through a polymerization reaction was followed by positron-annihilation lifetime spectroscopy measurements. Resins kept at curing temperatures (120, 150, and 200°C) changed form from a powder to a solid through a liquid. The size of the intermolecular spaces of the solid samples increased along with the progress of polymerization.
Źródło:
Acta Physica Polonica A; 1999, 95, 4; 671-676
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pal Application To the Study of Sorption Mechanism in Polymers - Capillary Effects
Autorzy:
Ito, Y.
Shimadzu, A.
Ikeda, K.
Powiązania:
https://bibliotekanauki.pl/articles/2008001.pdf
Data publikacji:
1999-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
Opis:
The positron annihilation lifetime technique can be applied to the study of the sorption mechanism in polymers in a quite unique way. In our previous experiments it had been shown that τ$\text{}_{3}$ and I$\text{}_{3}$ of polymers show a V-shaped dependence as a function of the contact with vapors. The decreasing part of the V-shaped dependence had been attributed to the Langmuir-type sorption, and the increasing part to delayed occurrence of the Henry-type sorption. But since there was some doubt that a capillary effect, i.e. the vapor to be sorbed is deposited in between the polymer membranes, might be involved in the increasing part, we performed a careful experiment to avoid the capillary effect. We have performed further experiments in a careful condition to avoid the capillary effect, and have observed the same V-shape as before. Thus our interpretation of the V-shaped dependence has been established. Furthermore, in another example it is shown a case where the capillary effect is observed. This latter case is an example how positron annihilation lifetime can distinguish the real sorption and false sorption (capillary effect).
Źródło:
Acta Physica Polonica A; 1999, 95, 4; 546-550
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Positron Irradiation Effects on Positronium Formation in Polycarbonate Sduring a Positron-Annihilation Experiment
Autorzy:
Suzuki, T.
Kondo, K.
Hamada, E.
Ito, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2025767.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
Opis:
The positron-irradiation effect on polycarbonate during a positron-annihilation lifetime spectroscopy experiment was investigated using different intensities of $\text{}^{22}$Na positron sources andγ-irradiated samples. The decrease in I$\text{}_{3}$ was larger for a larger intensity of positron sources. In the case of a weak source (≈ 140 kBq), I$\text{}_{3}$ did not change with the elapsed time for non-irradiated samples. However, for 1 MGy irradiated samples, I$\text{}_{3}$ measured with the weak source increased with the elapsed time. This can be attributed to a decrease in the radicals induced in the irradiated samples by γ-irradiation. In order to explain the change in I$\text{}_{3}$ measured at room and liquid-nitrogen temperatures, several effects, such as radicals, cross-linking, structure change, and charging, need to be considered. Also, it is difficult to explain the change in I$\text{}_{3}$ using only one of these effects.
Źródło:
Acta Physica Polonica A; 2001, 99, 3-4; 515-521
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Visible Light Irradiation on Positronium Formation in Polyethylene at Low Temperature
Autorzy:
Ito, Y.
Hirade, T.
Hamada, E.
Suzuki, T.
Powiązania:
https://bibliotekanauki.pl/articles/2007996.pdf
Data publikacji:
1999-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
Opis:
The effect of visible light exposing on the ortho-positronium formation in polyethylene was studied. Lifetime spectra of positrons in polyethylene were measured in the temperature range between 50 K and 370 K. It was observed that the visible light quenches the enhancement of ortho-positronium intensity (I$\text{}_{3}$) at lower temperature than ca. 250 K - the glass transition temperature of polyethylene. On the other hand, the lifetime of ortho-positronium component (τ$\text{}_{3}$) was not affected by the presence of the visible light.
Źródło:
Acta Physica Polonica A; 1999, 95, 4; 533-538
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Coincidence Doppler Broadening Spectroscopy to Hydrocarbons at Different Substance States
Autorzy:
Yu, R.
Suzuki, T.
Ito, Y.
Djourelov, N.
Kondo, K.
Shantarovich, V. P.
Powiązania:
https://bibliotekanauki.pl/articles/2042205.pdf
Data publikacji:
2005-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
36.10.Dr
82.30.Gg
78.70.Bj
Opis:
Coincidence Doppler broadening spectroscopy was applied to study n-hexane (C$\text{}_{6}$H$\text{}_{14}$), cyclohexane (C$\text{}_{6}$H$\text{}_{12}$) and cyclohexanone (C$\text{}_{6}$H$\text{}_{10}$O), at solid, as well as liquid states. The experiments were performed in parallel with traditional positron annihilation lifetime spectroscopy. Significant positron trapping by oxygen was observed in cyclohexanone; the oxygen effect is stronger in liquid state than in solid one, which can possibly be attributed to positron solvation in polar solution. Coincidence Doppler broadening results for n-hexane and cyclohexane indicate an existence of higher energetic annihilation electrons in Ps-bubble forming liquids than that in solids.
Źródło:
Acta Physica Polonica A; 2005, 107, 4; 697-701
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
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.
Powiązania:
https://bibliotekanauki.pl/articles/2024257.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
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.
Źródło:
Acta Physica Polonica A; 2001, 99, 3-4; 373-378
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variable-Energy Positron Annihilation as Highly Sensitive Nanoporosimetry for Porous Thin Films
Autorzy:
Ito, K.
Kobayashi, Y.
Powiązania:
https://bibliotekanauki.pl/articles/2042214.pdf
Data publikacji:
2005-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.70.Bj
78.55.Mb
Opis:
Positron annihilation was applied to measuring critical pore sizes in various materials. In recent years, positron annihilation with a variable-energy positron beam has emerged as a powerful tool for the investigation of porous thin films synthesized as low-k dielectrics, high performance gas sensor materials, and so on. This paper is a brief overview of recent progress in nanopore characterization of thin films by means of positron annihilation with a description of several important issues relevant to positron annihilation.
Źródło:
Acta Physica Polonica A; 2005, 107, 5; 717-723
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Free Volume Study on Three Types of Shape Memory Polymers by Positron Annihilation
Autorzy:
Ujihira, Y.
Li, H.-L.
Ito, K.
Powiązania:
https://bibliotekanauki.pl/articles/2008187.pdf
Data publikacji:
1999-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
64.70.Pf
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.
Źródło:
Acta Physica Polonica A; 1999, 95, 4; 677-682
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Iridociliary epithelial tumor in a cat
Autorzy:
Ito, S.
Narasaki, Y.
Nakano, Y.
Minami, T.
Kanemaki, N.
Powiązania:
https://bibliotekanauki.pl/articles/9938.pdf
Data publikacji:
2012
Wydawca:
Okulistyka Weterynaryjna
Tematy:
cat
animal disease
ocular disease
iridociliary epithelial tumour immunohistochemistry
tumour
Opis:
A 15-year-old female spayed domestic short-hair cat was referred for a nonpigmented mass within the pupil of the left eye. In the ophthalmic examination, the non-pigmented mass appeared behind the iris. Visual function was normal, and there were no significant clinical findings except the ciliary body mass. Seven days after presentation, the mass was removed with sclerotomy and iridocyclectomy. The mass was determined to be an iridociliary epithelial tumor upon histopathological and immunohistochemical analyses. Thirty-eight days after tumor removal, visual function was maintained, and the papillary light reflex remained normal.
A 15-year-old female spayed domestic short-hair cat was referred for a non-pigmented mass within the pupil of the left eye. In the ophthalmic examination, the non-pigmented mass appeared behind the iris. Visual function was normal, and there were no significant clinical findings except the ciliary body mass. Seven days after presentation, the mass was removed with sclerotomy and iridocyclectomy. The mass was determined to be an iridociliary epithelial tumor upon histopathological and immunohistochemical analyses. Thirty-eight days after tumor removal, visual function was maintained, and the papillary light reflex remained normal.
Źródło:
Okulistyka Weterynaryjna. e-kwartalnik dla lekarzy i studentów weterynarii; 2012, 3
2082-9256
Pojawia się w:
Okulistyka Weterynaryjna. e-kwartalnik dla lekarzy i studentów weterynarii
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Change of Free Volume in Polymer Gels As Studied by Positron Annihilation Lifetimes
Autorzy:
Ito, K.
Ujihira, Y.
Yamashita, T.
Horie, K.
Powiązania:
https://bibliotekanauki.pl/articles/2008070.pdf
Data publikacji:
1999-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
82.70.Gg
Opis:
Variations of a free volume size of a poly(N-isopropylacrylamide) gel and a polyacrylamide gel during a volume phase transition induced by a change of external environment - temperature, solvent composition, pH, and ion strength, are described. The free volume size is probed by positron annihilation lifetime technique. Variations of the free volume size suggest that a nanoscopic environment of the gels is affected by the free volume of the solvent phase and an interaction between the polymer chain and the solvent molecule in the swollen state, and by the aggregation of the polymer chain and a balance of the interaction among the polymer chain and the solvent molecules in the collapsed state. It is revealed that the free volume size reflects the essential change of the nanoscopic environment in the gels which could induce the macroscopic volume phase transition.
Źródło:
Acta Physica Polonica A; 1999, 95, 4; 551-556
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
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.
Powiązania:
https://bibliotekanauki.pl/articles/1812549.pdf
Data publikacji:
2008-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.60.+z
78.70.Bj
82.30.Gg
42.70.jk
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.
Źródło:
Acta Physica Polonica A; 2008, 113, 5; 1511-1516
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Repair of a traumatic corneal laceration in a cat using a tectonic heterograft
Autorzy:
Ito, S.
Terakado, K.
Ichikawa, Y.
Zama, T.
Minami, T.
Kudo, S.
Kanemaki, N.
Powiązania:
https://bibliotekanauki.pl/articles/9912.pdf
Data publikacji:
2014
Wydawca:
Okulistyka Weterynaryjna
Tematy:
cat
corneal laceration
tectonic heterograft
cornea
eye
Scottish Fold breed
keratoplasty
Źródło:
Okulistyka Weterynaryjna. e-kwartalnik dla lekarzy i studentów weterynarii; 2014, 2
2082-9256
Pojawia się w:
Okulistyka Weterynaryjna. e-kwartalnik dla lekarzy i studentów weterynarii
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 1-17 z 17

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