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Acquiring non-parametric scattering phase function from a single image

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Computational Visual Media 2018年第4期4卷 323-331页

作者： yuki Minetomo Hiroyuki Kubo Takuya Funatomi Mikio Shinya Yasuhiro Mukaigawa Nara Institute of Science and Technology 8916-5 Takayama-choIkomaNara630-0192Japan. Toho University 2-2-1 MiyamaFunabashiChiba274- 8510Japan. Dwango CG Research KADOKAWA Hongo Bldg.5-24-5 HongoBunkyo-kuTokyo113-0033Japan.

Acquiring accurate scattering properties is important for rendering translucent materials. In particular, the phase function, which determines the distribution of scattering directions, plays a significant role in the appearance of a material. We propose a distinctive scattering theory that approximates the effect of single scattering to acquire the non-parametric phase function from a single image. Furthermore, in various experiments, we measured the phase functions from several real diluted media and rendered images of these materials to evaluate the effectiveness of our theory.

关键词： scattering phase function measurement rendering

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Influence of Housing and Urban Development on Debris Flow Flooding and Deposition

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Journal of Mountain Science 2013年第2期10卷 273-280页

作者： Kana NAKATANI yuki OKUYAMA Yuji HASEGAWA Yoshifumi SATOFUKA Takahisa MIZUYAMA Graduate School of Agriculture Kyoto UniversityKitashirakawa Oiwake-choSakyo-kuKyoto City606-8502Japan National Institute for Land and Infrastructure Management AsahiTsukuba CityIbaraki305-0804Japan Civil Engineering Research Laboratory 904-1 TohigashiTsukuba CityIbaraki300-2633Japan Department of Civil Engineering Ritsumeikan University1-1-1 Noji-higashiKusatsu CityShiga525-8577Japan

Debris flows form deposits when they reach an alluvial fan until they eventually ***,houses located in the alluvial fan might affect the debris flow flooding and deposition *** previous studies have considered the effects of houses on debris flow flooding and *** study conducted model experiments and numerical simulations using the Kanako2D debris flow simulator to determine the influence of houses on debris flow flooding and *** model experiments showed that when houses are present,the debris flow spreads widely in the cross direction immediately upstream of the houses,especially when the flow discharge is large or the grain size is *** located in the alluvial fan also influence the deposition *** presence of houses led to flooding and deposition damage in some places and reduced the damage in *** simulation also demonstrated the influence of *** the model experiment and the simulation showed that houses change the flooding and deposition areas.

关键词： Debris flow Alluvial fan House Modelexperiment Numerical simulation

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Sediment organic matter source estimation and ecological classification in the semi-enclosed Batan Bay Estuary, Philippines

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International Journal of Sediment Research 2021年第1期36卷 110-119页

作者： Yuya Ogawa yuki Okamoto Resurreccion Bitoon Sadaba Mamoru Kanzaki Graduate School of Agriculture Kyoto University 2. Graduate School of Global Environmental Studies Kyoto University Division of Biological Sciences University of the Philippines Visayas

The large organic matter flow in tropical coastal areas is recognized as an important process in the global carbon(C) ***,the nature of organic matter flow in semi-enclosed tropical estuaries remains unclear due to the various environmental processes(tidal change,river flow,waves from the sea,and internal circulation) and organic matter sources ***,sediment organic matter(SOM) sources,and their distribution pattern,are key to understanding ecosystem material *** research in the Batan Bay Estuary,Philippines,a semi-enclosed estuary under large mangrove deforestation,was conducted to determine ecosystem properties through analysis of C and nitrogen stable isotope ratios and environmental ***,we determined that mangrove litter,microphytobenthos,and phytoplankton are the main SOM sources in the Batan Bay ***,the estuary was classified into three ecological zones(the Bay zone,Back-barrier zone,and River zone).In addition,we estimated SOM source ratios using the Stable Isotope Analysis in R package and determined different organic matter sources in different *** high ratios of mangrove litter as SOM indicate that a large amount of terrestrial plant organic matter remains despite the heavy mangrove deforestation that has occurred since the 1980 s,and that the Back-barrier zone consists of a different type of ecosystem that promotes accumulation of C from mangrove litter and micro phytobenthos.

关键词： Mangrove Sediment organic matter Stable isotope Carbon Nitrogen SIAR

Recording the direct surgeon’s view with an operating microscopic view improves microscopic ophthalmic surgery training

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International Journal of Ophthalmology(English edition) 2023年第9期16卷 1555-1558页

作者： Masayuki Akimoto Kosei Tomita Miyo Yoshida yuki Hama Ophthalmology Osaka Red Cross HospitalTennoji-kuOsaka 543-8555Japan

AIM:To establish a recording system with a direct view of the surgeon to supplement video recording under an operating microscope,which lacks information on the movement and position of the surgeon’s hands,and to facilitate the reproduction of a skilled surgeon’s technique by a surgeon in ***:A small camera was attached to the operating microscope with a custom *** surgeon’s view and direct surgeon’s view through this new camera were recorded in the surgical recording *** movies were synchronized and analyzed how do surgeons handle the ***:A small camera attached to the operating microscope allowed the surgeon’s hands motion to be recorded without interfering with the surgeon’s *** surgeons used different methods to manipulate the ultrasound handpiece and the irrigation/aspiration *** in the simple paracentesis procedure,different surgeons used different ***-in-training were able to identify and improve their weaknesses by watching synchronized movies of their hand motions and microscopic ***:Simultaneous recording the surgical field out of the operating microscopic view by a small camera set on the microscope is comprehensive and improves surgeons-in-training understanding and learning surgeries.

关键词： operating microscopic view direct surgeon’s view video recording microscopic surgery training

A sustainable way of agricultural livelihood:edible bird’s nests in Indonesia

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Ecosystem Health and Sustainability 2021年第1期7卷 332-341页

作者： Yutaka Ito Ken’ichi Matsumoto Aswin Usup yuki Yamamoto Faculty of Regional Policy The University of ShimaneMatsueJapan Faculty of Economics Toyo UniversityTokyoJapan Faculty of Agriculture University of Palangka RayaPalangkarayaIndonesia Graduate School of Fisheries and Environmental Sciences Nagasaki UniversityNagasakiJapan

Edible birds’nests(EBNs)have traditionally been produced in Southeast *** farmers construct buildings for swiftlets and harvest their *** farming does not directly degrade forest resources and is therefore considered a sustainable means of production,whereas the expansion of other agricultural activities often relies on the degradation of natural *** study examines the relationship between natural resources and agricultural livelihoods,focusing on Indonesian EBN *** survey data that we collected in 2017,combined with satellite information on the extent of the forest in Central Kalimantan,Indonesia,we measured production efficiency and identified the natural and social factors that enhance production *** results show that a forest extent ranging between 2,000 and 6,000 meters from nesting building is positively associated with the production efficiency of EBN farming,perhaps because extensive forest could help swiftlets to collect food and build ***,while EBN farming is a sustainable and profitable option,the initial costs of constructing buildings to house swiftlets may deter farmers from participating in the process.

关键词： Edible bird’s nest swiftlet Indonesia forest natural habitat ecosystem services satellite data

Analysis of keto-enol tautomers of curcumin by liquid chromatography/mass spectrometry

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Chinese Chemical Letters 2013年第8期24卷 685-687页

作者： Shin-ichi Kawano Yusuke Inohana yuki Hashi Jin-Ming Lin Department of Chemistry Beijing Key Laboratory of Microanalytical Methods and InstrumentationTsinghua University Shimadzu Global COE for Application & Technical Development Shimadzu(China) Co.Ltd. Global Application Development Center Shimadzu Corporation Department of Chemistry Beijing Key Laboratory of Microanalytical Methods and Instrumentation.Tsinghua University

Keto-enol tautomers of curcumin were confirmed by reversed-phase liquid chromatography（RPLC）/ hybrid quadrupole ion trap/time-of-flight mass spectrometry（QIT/TOFMS）.Tautomers gave different MS/MS spectra in negative *** mass spectra were also obtained by hydrogen/deuterium exchange LC/MS/MS in positive *** results suggest that enol form is the major form in the solution（water/acetonitrile）.

关键词： Keto-enol tautomer Curcumin Liquid chromatography/mass spectrometry

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Coevolution of Myoelectric Hand Control under the Tactile Interaction among Fingers and Objects

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Cyborg and Bionic Systems 2022年第1期2022卷 285-302页

作者： yuki Kuroda Yusuke Yamanoi Shunta Togo Yinlai Jiang Hiroshi Yokoi Joint Doctoral Program for Sustainability Research Graduate School of Informatics and Engineering The University of Electro-CommunicationsTokyoJapan Department of Mechan ical and Intelligent System Engineering Graduate School of Informatics and Engineering The University of Electro Communications TokyoJapan Center for Neuroscience and Biomedical Engineering The University of Electro Communications TokyoJapan Bejing Innovation Center for Inelligent Robots and Systems BeijingChina

The usability of a prosthetic hand difers significantly from that of a real ***,the complexity of manipulation increases as the number of degrees of freedom to be controlled increases,making manipulation with biological signals extremely *** overcome this problem,users need to select a grasping posture that is adaptive to the object and a stable grasping method that prevents the object from *** previous studies,these have been left to the operating skills of the user,which is extremely difficult to *** this study,we demonstrate how stable and adaptive grasping can be achieved according to the object regardless of the user's operation *** required grasping technique is achieved by determining the correlation bet ween the motor output and each sensor through the interaction between the prosthetic hand and the surrounding stimuli,such as myoelectricity,sense of touch,and grasping *** agents of the 16 DOF robot hand were trained with the myoelectric signals of six participants,including one child with a congenital forearm ***,each agent could open and close the hand in response to the myoeletric stimuli and could accomplish the object pickup *** the tasks,the agents successfully identified grasping patterns suitable for practical and stable positioning of the *** addition,the agents were able to pick up the object in a similar posture regardless of the partiipant,suggesting that the hand was optimized by evolutionary computation to a posture that prevents the object from being dropped.

关键词： robot Objects overcome

Blockchain-based cross-domain authorization system for user-centric resource sharing

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Blockchain(Research and Applications) 2023年第2期4卷 67-81页

作者： yuki Ezawa Shohei Kakei Yoshiaki Shiraishi Masami Mohri Masakatu Morii Department of Electrical and Electronic Engineering Kobe UniversityKobeHyogo657-8501Japan Department of Computer Science Nagoya Institute of TechnologyNagoyaAichi466-8555Japan Faculty of Informatics Kindai UniversityHigashi-OsakaOsaka577-8502Japan

User-centric data sharing is essential to encourage citizens'active participation in the digital *** key to smart cities,a form of the digital economy,is the promotion of public use of citizen ***,it is not easy to utilize data without citizens’*** this study,we took a technological approach to these *** access(UMA)is a well-known framework for delegating resource access rights to others on the *** UMA,authorization mechanisms are designed to be centralized so that resource owners can centrally manage access rights for various resources stored in different ***,the lack of transparency in the authorization mechanism is a barrier to its implementation in large-scale systems such as smart *** this study,we developed a blockchain-based cross-domain authorization architecture that enables a resource-sharing ecosystem in which organizations that wish to utilize data can freely trade with each *** proposed architecture solves the transparency problem that conventional authorization systems have had by designing the authorization mechanism on blockchain *** implemented the proposed architecture as smart contracts and evaluated its processing *** resultant time required for delegating access rights and accessing resources was less than 500 ***,we found that the fluctuation in the processing time overhead was *** on these results,we concluded that performance degradation with the proposed architecture is minor.

关键词： Access control Authorization Blockchain Hyperledger fabric User-managed access

Verification of Characteristics of Gaussian Filter Series for Surface Roughness in ISO and Proposal of Filter Selection Guidelines

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Nanomanufacturing and Metrology 2021年第2期4卷 97-108页

作者： yuki Kondo Ichiro Yoshida Dan Nakaya Munetoshi Numada Hiroyasu Koshimizu HOSEI University 3-7-2 Kajino-choKoganei-shiTokyo184-8584Japan Chukyo University 101-2 Yagotohonmati Showa-kuNagoyaAichi466-8666Japan YYC Solution 3-102-3F Kamiyashiro Meito-kuNagoyaAichi465-0025Japan

In surface roughness measurement,if spikes are included in the primary profile,a problem occurs wherein the Gaussian filter(GF)is unable to extract the shape *** address this problem,the use of a robust filter is ***,ISO16610-31:Gaussian regression filters(GRF)only provide a single method and a few examples,and does not specify the conditions under which the primary profile can be ***,the data presented in the example on robustness in ISO16610-31 do not contain roughness *** actual roughness measurements,no primary profile exists that does not include a roughness *** the characteristics of GRFs are unknown,it is not yet clear which filter should be used for which primary profile,and this is an issue that has been raised at ISO and JIS *** addition,the establishment of filter selection guidelines is necessary at measurement ***,this paper clarifies the characteristics of GF-series filters,summarizes the points to be considered when using them,and identifies the filter that should be selected according to different *** on the results,a figure that visualizes the characteristics of filters and a flowchart regarding which filter should be used are created;these tools,to the best of the authors’knowledge,did not exist prior to this *** is believed that these results will help fulfil the needs of measuring job sites and also aid in filter selection.

关键词： Surface roughness Gaussian filter Robust filter M-estimation method Fast M-estimation method