578 research outputs found
Moderation of Negative Oxygen Effects by Small Yttrium Addition to Low Activation Vanadium Alloys
No full text0000-0001-6564-8922In order to improve irradiation embrittlement of vanadium alloys for fusion reactors, yttrium (Y) has been added reducing the interstitial oxygen impurity. However Y addition can also degrade high-temperature strength, because Y could scavenge oxygen in solid solution, which is a strong hardening agent in vanadium alloys. In this study, the effect of Y addition and oxygen level on the mechanical properties was investigated from the view points of both the high-temperature strength and low temperature ductility. Y addition was suggested to moderate the hardening and embrittlement induced by oxygen impurity sustaining the high-temperature strength within an acceptable level.journal articl
High-temperature creep properties of NIFS-HEAT-2 high-purity low-activation vanadium alloy
No full textORCID 0000-0002-5000-1269A low-activation vanadium alloy with the composition of V-4 mass% Cr-4 mass% Ti is an alternative to reduced activation ferritic/martensitic steels for blanket structural material in fusion reactors. The NIFS-HEAT-2 (NH2) is the world's highest-purity V–4Cr–4Ti alloy among over 30 kg scale heats. The processes to purify this heat have successfully enhanced workability, weldability and low-activation characteristics, however degradation of high-temperature strength was a concern due to possible purification softening. Therefore, the present study evaluated high-temperature creep properties of NH2 at around the operation temperature, 700 °C–800°C. The degradation of creep properties, such as shorter rupture time and enhanced creep rate, were observed for NH2, compared with a conventional US heat in the stress range of 150–200 MPa. On the other hand, it was revealed that these creep properties were comparable to those of the US heat in the lower applied stress of 100 MPa, though only short term rupture data are available at this moment. Since design stress for fusion blankets is expected below 100 MPa, purification up to the level of NH2 will induce no negative impact on the blanket service conditions.journal articl
Time sense: cultural difference and the creation, construction and reception of animated film
No full text© 2012 Dr. Takuya SuzukiThis dissertation explores cultural differences in animated film production, investigating the influence of the filmmaker and viewer in the creation, the construction and the sensibility of film. A notion of inter-subjective time is applied to the discussion of microscopic and macroscopic perception of animation movement via 20th century philosophers, such as Edmund Husserl (1859-1938), Henri Bergson (1859-1941), J.M.E. McTaggart (1866-1925), Martin Heidegger (1889-1976), Maurice Merleau-Ponty (1908-1961) and Gilles Deleuze (1925-1995). This is an exploration of scientific perspectives of time as well as an investigation of cultural differences in the intentionality and the direction of time to the discussion of international animation phenomena.
Understanding animation as an intersection of human perception, cultural and social movement, the author introduces his theoretical notion, time-sense, which is a combination of subjective and inter-subjective time, giving rise to archetype and our awareness of the quality of slowness and fastness of movement and its tracked shape, this dissertation reconsiders the influence of complex phenomenon of hybridized time-sense, and its close relationship to the microscopic movement of Japanese animation film.
Focusing on the temporal space or ma used in anime series Puella Magi Madoka Magica (2011), the animated film Spirited Away (2001) and The Sky Crawlers (2008) as well as the movement of Hatsune Miku and Japanese video sharing website Nico Nico Dôga, this thesis identifies a cross-cultural/ intercultural time theory in search of more specific understanding of differences and similarities between cultures particularly as it relates to animation
Investigating the Form-Meaning Mapping in the Acquisition of English and Japanese Measure Phrase Comparatives
No full textWe present a set of experiments investigating how English- and Japanese-speaking children interpret Measure Phrase comparatives (e.g., X is 10 meters taller than Y / X-wa Y-yori 10-meters takai). We show that despite overt cues to the comparative interpretation (i.e., the comparative -er morpheme in English, and explicit linguistic and visual reference to a contextual standard), children representing both languages diverge from their adult counterparts in that they access a non-adult-like ‘absolute measurement’ interpretation (i.e., X is 10 meters tall). We propose to account for their response pattern by appealing to proposals by Svenonius and Kennedy (2006) and Sawada and Grano (2011) that Meas in the head of the DegP, which houses the differential, selects for an absolute minimal value: zero. We argue that young children appeal to this absolute zero minimum in lieu of the correct derived standard, and must learn to override this value by appealing to the context to set the standard of comparison when interpretation requires them to do so.Peer reviewe
Patentopia: A multi-stage patent extraction platform with disambiguation for certain semantic challenges
No full textBibliographic name disambiguation is an major semantic challenge, but critical to social sciences studies of important intellectual assets. Here we contribute to innovation research in several ways. We show a significant synonym problem in author names and discuss how a pre-processing heuristic step standardizing name variants helps, but homonyms generated with Chinese names are particularly difficult to resolve and manifest in an associated location list. Here we identify a new phenomenon of "onomastic profusion," the frequent use of certain words in firm names for semantic reasons that can confound disambiguation clustering algorithms. We illustrate these concerns with Patentopia, our customized platform accessing the PatentsView portal for the United States Patent and Trademark Office database and available for free academic use. This multi-stage system uses heuristics in concert with the PatentsView clustering process and reports meta-data to further assist analysis. As highly relevant use cases, we illustrate system performance with data derived from two important public innovation programs, I-Corps and Small Business Innovation Research (SBIR), and we close with implications for bibliometric analysis of current patent data.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Delft Centre for Entrepreneurshi
Position sensitive, continuous wavelength tunable laser based on photopolymerizable cholesteric liquid crystals with an in-plane helix alignment
No full textThis article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Hiroyuki Yoshidaa, Yo Inoue, Takuya Isomura, Yuko Matsuhisa, Akihiko Fujii, and Masanori Ozaki, Appl. Phys. Lett. 94, 093306 (2009) and may be found at https://doi.org/10.1063/1.3089846.Position sensitive lasing with continuous wavelength tunability and emission in the cell-plane direction is demonstrated from a photopolymerized cholesteric liquid crystal film. The device has a gradually dilating helix lying in the cell-plane direction and is fabricated by applying a vertical electric field in a conventionally rubbed wedge cell while cooling the sample from the isotropic phase. Tuning range of ~ 100 nm is achieved by translating the device with respect to the pump beam. Photopolymerizable materials are especially useful in this configuration since a freestanding film, not requiring any external voltage to maintain the molecular ordering, can be prepared
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