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Self-assembly of Fine Particles Applied to the Production of Antireflective Surfaces
Kobayashi, Hayato,Moronuki, Nobuyuki,Kaneko, Arata Korean Society for Precision Engineering 2008 International Journal of Precision Engineering and Vol.9 No.1
We introduce a new fabrication process for antireflective structured surfaces. A 4-inch silicon wafer was dipped in a suspension of 300-nm-diameter silica particles dispersed in a toluene solution. When the wafer was drawn out of the suspension, a hexagonally packed monolayer structure of particles self-assembled on almost the complete wafer surface. Due to the simple process, this could be applied to micro- and nano-patterning. The self-assembled silica particles worked as a mask for the subsequent reactive ion etching. An array of nanometer-sized pits could be fabricated since the regions that correspond to the small gaps between particles were selectively etched off. As etching progressed, the pits became deeper and combined with neighboring pits due to side-etching to produce an array of cone-like structures. We investigated the effect of etching conditions on antireflection properties, and the optimum shape was a nano-cone with height and spacing of 500 nm and 300 nm, respectively. This nano-structured surface was prepared on a $30\;{\times}\;10-mm$ area. The reflectivity of the surface was reduced 97% for wavelengths in the range 400-700 nm.
Self-assembly of Fine Particles Applied to the Production of Antireflective Surfaces
Hayato Kobayashi,Nobuyuki Moronuki,Arata Kaneko 한국정밀공학회 2008 International Journal of Precision Engineering and Vol.9 No.1
We introduce a new fabrication process for antireflective structured surfaces. A 4-inch silicon wafer was dipped in a suspension of 300-㎚-diameter silica particles dispersed in a toluene solution. When the wafer was drawn out of the suspension, a hexagonally packed monolayer structure of particles self-assembled on almost the complete wafer surface. Due to the simple process, this could be applied to micro- and nano-patterning. The self-assembled silica particles worked as a mask for the subsequent reactive ion etching. An array of nanometer-sized pits could be fabricated since the regions that correspond to the small gaps between particles were selectively etched off. As etching progressed, the pits became deeper and combined with neighboring pits due to side-etching to produce an array of cone-like structures. We investigated the effect of etching conditions on antireflection properties, and the optimum shape was a nano-cone with height and spacing of 500 ㎚ and 300 ㎚, respectively. This nano-structured surface was prepared on a 30 × 10-㎚ area. The reflectivity of the surface was reduced 97% for wavelengths in the range 400-700 ㎚.
Assisting Authors to Convert Raw Products into Polished Prose
( Takumi Ito ),( Tatsuki Kuribayashi ),( Hayato Kobayashi ),( Ana Brassard ),( Masato Hagiwara ),( Jun Suzuki ),( Kentaro Inui ) 서울대학교 인지과학연구소 2020 Journal of Cognitive Science Vol.21 No.1
Being a notoriously complex problem, writing is generally decomposed into a series of subtasks: idea generation, expression, revision, etc. Given some goal, the author generates a set of ideas (brainstorming), which he integrates into some skeleton (outline, text plan, outline). This leads to a first draft which is submitted then for revision possibly yielding changes at various levels (content, structure, form). Having made a draft, authors usually revise, edit, and proofread their documents. We confine ourselves here only to academic writing, focusing on sentence production. While there has been quite some work on this topic, most writing assistance has mainly dealt with grammatical errors, editing and proofreading, the goal being the correction of surface-level problems such as typography, spelling, or grammatical errors. We broaden the scope by also including cases where the entire sentence needs to be rewritten in order to express properly all of the information planned. Hence, Sentence-level Revision (SentRev) becomes part of our writing assistance task. Obviously, systems performing well in this task can be of considerable help for inexperienced authors by producing fluent, well-formed sentences based on the user’s drafts. In order to evaluate our SentRev model, we have built a new, freely available crowdsourced evaluation dataset which consists of a set of incomplete sentences produced by nonnative writers paired with final version sentences extracted from published academic papers. We also used this dataset to establish baseline performance on SentRev.
SEARCH FOR NEUTRINOS FROM GRB 080319B AT SUPER-KAMIOKANDE
Thrane, E.,Abe, K.,Hayato, Y.,Iida, T.,Ikeda, M.,Kameda, J.,Kobayashi, K.,Koshio, Y.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakayama, S.,Obayashi, Y.,Ogawa, H.,Sekiya, H.,Shiozawa, M.,Suzuki, Y.,Takeda, IOP Publishing 2009 The Astrophysical journal Vol.697 No.1
SEARCH FOR ASTROPHYSICAL NEUTRINO POINT SOURCES AT SUPER-KAMIOKANDE
Thrane, E.,Abe, K.,Hayato, Y.,Iida, T.,Ikeda, M.,Kameda, J.,Kobayashi, K.,Koshio, Y.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakayama, S.,Obayashi, Y.,Ogawa, H.,Sekiya, H.,Shiozawa, M.,Suzuki, Y.,Takeda, IOP Publishing 2009 The Astrophysical journal Vol.704 No.1
<P>It has been hypothesized that large fluxes of neutrinos may be created in astrophysical 'cosmic accelerators.' The primary background for a search for astrophysical neutrinos comes from atmospheric neutrinos, which do not exhibit the pointlike directional clustering that characterizes a distant astrophysical signal. We perform a search for neutrino point sources using the upward-going muon data from three phases of operation (SK-I, SK-II, and SK-III) spanning 2623 days of live time taken from 1996 April 1 to 2007 August 11. The search looks for signals from suspected galactic and extragalactic sources, transient sources, and uncataloged sources. While we find interesting signatures from two objects-RX J1713.7-3946 (97.5% CL) and GRB 991004D (95.3% CL)-these signatures lack compelling statistical significance given trial factors. We set limits on the flux and fluence of neutrino point sources above energies of 1.6 GeV.</P>
Successful introduction of modified dorsolumbar epidural anesthesia in a bovine referral cent
Inhyung Lee,Miho Hiraoka,Toshiharu Miyagawa,Hayato Kobayashi,Toshihiko Takahashi,Hiroaki Kishi,Hiroshi Kobayashi 대한수의학회 2007 Journal of Veterinary Science Vol.8 No.2
This study describes the successful use of modified dorsolumbar epidural anesthesia with a fixed volume of anesthetic in a bovine referral center. Among the 130 Holstein cattle scheduled for flank surgery, 90 cattle received a mixed anesthetic consisting of 1 ml of xylazine hydrochloride and 3 ml of lidocaine hydrochloride by modified dorsolumbar epidural anesthesia. Eighteen cattle with dehydration and/or lameness received a mixed anesthetic containing 0.5 ml of xylazine and 3 ml of lidocaine. Infiltration anesthesia was performed in 22 cattle whose epidural space could not be reached in order to perform the flank surgery. The surgeries began about 12 min after the administration of the anesthetic and lasted for about 36 min. The modified method using a fixed volume of anesthetic was successfully introduced and effectively used in a bovine referral center. This modified method will allow veterinarians to save time and effort, thus lowering the cost of each surgery.
First study of neutron tagging with a water Cherenkov detector
The Super-Kamiokande Collaboration,Watanabe, H.,Zhang, H.,Abe, K.,Hayato, Y.,Iida, T.,Ikeda, M.,Kameda, J.,Kobayashi, K.,Koshio, Y.,Miura, M.,Moriyama, S.,Nakahata, M.,Nakayama, S.,Obayashi, Y.,Ogawa, North-Holland 2009 Astroparticle physics Vol.31 No.4
A first study of neutron tagging is conducted in Super-Kamiokande, a 50,000 ton water Cherenkov detector. The tagging efficiencies of thermal neutrons are evaluated in a 0.2% GdCl<SUB>3</SUB>-water solution and pure water. They are determined to be, respectively, 66.7% for events above 3MeV and 20% with corresponding background probabilities of 2x10<SUP>-4</SUP> and 3x10<SUP>-2</SUP>. This newly developed technique may enable water Cherenkov detectors to identify ν@?<SUB>e</SUB>'s from astrophysical sources as well as those produced by commercial reactors via the delayed coincidence scheme.
HUMAN INTERFACE TO MULTIMEDIA DATABASE SYSTEMS
( Kazuhide Higuchi ),( Masahiro Tada ),( Akihiro Ogino ),( Ayumi Sato ),( Emi Yano ),( Hayato Kobayashi ),( Toshikazu Kato ) 한국감성과학회 2002 춘계학술대회 Vol.2002 No.-
To transmit users`` intentions that vary with each person, intuitive and bi-directional interactions between users and a computer are necessary. We considered these interactions by dividing them into two spaces, physical space and informational space. Informational space supports human thinking process by arranging and visualizing much information. Physical space reproduces the real world where various restrictions exist to virtual space. From the viewpoint of three aspects - contents model, kansei model and context model - we defmed the style of the interaction between user and multimedia database. In this paper, for the purpose of examining the way to realize the interaction based on these models, we developed interior design coordination support system and garden coordination system, and then evaluated them.