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Exploiting scattering media for exploring 3D objects

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Light(Science & Applications) 2016年第1期5卷 202-208页

作者： Alok Kumar Singh Dinesh N Naik Giancarlo Pedrini mitsuo takeda Wolfgang Osten Institut für Technische Optik(ITO)and Stuttgart Research Center of Photonic Engineering(SCoPE) University of StuttgartPfaffenwaldring 970569 StuttgartGermany School of Physics University of HyderabadHyderabad 500046India Center for Optical Research and Education(CORE) Utsunomiya UniversityYoto 7-1-2UtsunomiyaTochigi321-8585Japan

Scattering media,such as diffused glass and biological tissue,are usually treated as obstacles in *** cope with the random phase introduced by a turbid medium,most existing imaging techniques recourse to either phase compensation by optical means or phase recovery using iterative algorithms,and their applications are often limited to two-dimensional *** contrast,we utilize the scattering medium as an unconventional imaging lens and exploit its lens-like properties for lensless threedimensional(3D)imaging with diffraction-limited *** spatially incoherent lensless imaging technique is simple and capable of variable focusing with adjustable depths of focus that enables depth sensing of 3D objects that are concealed by the diffusing ***-field imaging with diffraction-limited resolution is verified experimentally by a single-shot recording of the 1951 USAF resolution test chart,and 3D imaging and depth sensing are demonstrated by shifting focus over axially separated objects.

关键词： intensity correlation technique lensless imaging scattering media 3D imaging

光学空间频率合成器及其在无分散三维形状计测中的应用(英文)

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实验力学 2007年第3期22卷 346-349页

作者：段志辉宫本洋子武田光夫電気通信大学

传统的白光干涉法、光学频谱扫描干涉法、低相干度断层扫描法以及其他三维形状计测法均采用宽带光学频谱光源实现绝对高度的测量,因此当测量对象存在不均匀的折射率分布或者光学吸收特性时,以上方法将不能给出准确的测量结果。针对传统... 详细信息

传统的白光干涉法、光学频谱扫描干涉法、低相干度断层扫描法以及其他三维形状计测法均采用宽带光学频谱光源实现绝对高度的测量,因此当测量对象存在不均匀的折射率分布或者光学吸收特性时,以上方法将不能给出准确的测量结果。针对传统绝对干涉法的这些制约,本研究通过干涉现象中时空参数的类比,提出了宽带空间频谱单色光源的概念,并通过改变光源的空间频谱构造验证了无分散三维绝对形状测定方法的可行性。

关键词：光学空间频率合成器三维形状计测空间频谱扫描干涉法梳状空间频率扫描干涉法正弦函数空间频率扫描干涉法

Evaluating mechanism of banana pseudo-stem retting using seawater:A cost-effective surface pre-treatment approach

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Journal of Bioresources and Bioproducts 2024年第3期9卷 322-335页

作者： Prince Hotor Ahmed H.Hassanin Osbert Akatwijuka Mohamed A.H.Gepreel mitsuo Yamamoto Yukie Saito Ahmed Abdel-Mawgood Egypt-Japan University of Science and Technology Biotechnology ProgramAlexandria GovernorateNew Borg Al Arab 21934Egypt Alexandria University Department of Textile EngineeringAlexandria GovernorateBab Sharqi 5424041Egypt Egypt-Japan University of Science and Technology Material Science and EngineeringAlexandria GovernorateNew Borg Al Arab 21934Egypt Graduate School of Agricultural and Life Sciences The University of TokyoBunkyo-KuTokyo 113-8657Japan

Retting has been employed to extract natural fibers from agricultural wastes as a biological and cost-effective approach for *** its global abundance,banana pseudo-stem is a promising agro-waste for lignocellulosic fiber *** this study,fibers were extracted from the pseudo-stems after being pre-treated under four conditions using seawater at room temperature for up to 35 d Bacterial isolation from the fresh seawater sample and screening for ligninolytic ability were *** load as well as laccase and manganese peroxidase enzyme activity profile assay during the retting duration were *** transform infrared(FT-IR)and X-day diffraction(XRD)analyses were also examined for both pre-treated and untreated extracted *** results shows that six out of the eight bacterial isolates had the ability to degrade *** treatments(Raw stem+Raw seawater)and(Autoclaved stem+Raw seawater)recorded the highest viable bacterial load of 9.24×102 and 4.46×102 CFU,respectively,on the 14th day of the retting ***,the highest laccase and manganese peroxidase enzymes activity was recorded for(Raw stem+Raw seawater)and(Autoclaved stem+Raw seawater)treatments in the second to the third *** FT-IR spectra of the pre-treated fibers revealed relative reductions in peaks attributed to polysaccharides and other amorphous substances for all retting *** XRD diffractogram revealed that the crystallinity index(CI)of pre-treated fibers increased in all seawater retting treatment ***,the CI for fibers pre-treated under enzymatic conditions were enhanced even after five *** analysis for selected bacterial isolates showed homology to sequences of Bacillus velezensis,Shewanella sp.L8–5,and Citrobacter amalonaticus and Bacillus subtilis j8 *** these findings,it was suggested that physical,biological,and chemical actions were collectively involved in the seawater retting process of banana ps

关键词： Seawater retting Banana pseudo-stem Natural fiber Enzyme activity Colony forming unit

Investigation of HO_(2) uptake mechanisms onto multiple-component ambient aerosols collected in summer and winter time in Yokohama,Japan

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Journal of Environmental Sciences 2024年第3期137卷 18-29页

作者： Jun Zhou Yukiko Fukusaki Kentaro Murano Tania Gautam Yu Bai Yoshimi Inomata Hiroaki Komatsu Mayuko takeda Bin Yuan Min Shao Yosuke Sakamoto Yoshizumi Kajii Institute for Environmental and Climate Research Jinan UniversityGuangzhou 511443China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation forEnvironmental Quality Guangzhou 511443China Graduate School of Global Environmental Studies Kyoto UniversityKyoto606-8501Japan Yokohama Environmental Science Research Institute Yokohama Kanagawa 221–0024Japan Department of Chemistry University of AlbertaAlbertaEdmonton T6G 2G2Canada Graduate School of Human and Environmental Studies Kyoto UniversityKyoto 606-8501Japan Kanagawa Environmental Research Center Kanagawa 254-0014Japan Center for Regional Environmental Research National Institute for Environmental StudiesIbaraki305-8506Japan

The heterogeneous loss of HO_(2)radicals onto ambient aerosols plays an important role in tropospheric ***,sparse investigation of the dominating parameters controlling the HO_(2)uptake coefficients onto ambient aerosols(γHO_(2))has largely hindered the application of the measuredγHO_(2)to the global spatial *** we induced an offine method using LFP-LIF technique to measure the kinetics of HO_(2)uptake onto ambient aerosols collected in summertime and wintertime in Yokohama city,a regional urban site near Tokyo,*** controlling the dominating parameters which infuenceγHO_(2),we were able to investigate the detailed HO_(2)uptake *** characterized the chemical composition of the collected ambient aerosols,including organics,inorganics,transition metals ions,*** modeledγHO_(2)using different *** show thatγHO_(2)increased with the increase in RH,and the aerosol states(“dry”or wet/aqueous)have large effects onγHO_(2).With fixed RH and aerosol chemical composition,γHO_(2)was highly dependent on pH and inversely correlated with[HO_(2)]_*** combing the measuredγHO_(2)values with the modeled ones,we found that both the HO_(2)self-reaction and transition metal-catalyzed reactions should be accounted for to yield a single parameterization to predictγHO_(2),and different chemical compositions may have collective effects onγHO_(2).Results may serve for extending theγHO_(2)values measured at one observation site to different environmental conditions,which will help us to achieve more accurate modeling results concerning secondary pollutant formation(i.e.,ozone).

关键词： HO_(2)uptake kinetics Offine method Impacting factors Mechanism

Producing micro-droplet of dilute sulphuric acid on pure iron surface and observing its corrosion behaviour by atomic force microscopy

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中国有色金属学会会刊：英文版 2006年第B2期16卷 749-752页

作者： mitsuo KIDO Koji MUKAI Faculty of EngineeringHiroshima Institute of Technology 1-2-1 MiyakeSaeki-KuHiroshima 731-5193Japan

A simple method was presented to produce a micro-droplet of sulphuric acid on a pre-selected micro-zone on a pure iron surface with the tip of an AFM cantilever. The three-dimensional shape of the droplet was imaged with the AC non-contact mode of the AFM, and the liquid/solid interface was observed in situ during corrosion using the contact mode. The substrate surface beneath the droplet was lowered by approximately 19 nm after 3.6 ks of adhesion. This method has important implications for experimental studies of micro-zone corrosion or lubrication.

关键词：纯铁表面腐蚀稀释硫酸微滴原子力显微镜钢

Analysis of air adsorptive on solid surfaces by AFM and XPS

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中国有色金属学会会刊：英文版 2006年第B2期16卷 753-758页

作者： mitsuo KIDO Faculty of EngineeringHiroshima Institute of Technology 1-2-1 MiyakeSaeki-KuHiroshima 731-5193Japan

Solid surfaces of HOPG, pure copper, chromium, zinc, copper and SUS304 steel were observed in ambient air with an a.c. non-contact mode of atomic force microscope(AFM). A type of film-like-domains (adsorptive) was detected on the above surfaces. The thickness of the adsorptive was about 1.2-2.4 nm in this case. The film-like-adsorptive was confirmed to be a liquid layer by the static contact-mode scanning, the measurement of the elasticity and viscosity images, and the detection of the condensation/ evaporation phenomena when the relative humidity changed. The liquid layer is considered to be condensed water covered with organic contaminant.

关键词：固体表面空气吸附成分分析原子力显微镜 XPS 水有机污染物

Approaches to Stable Operation of Shaftless Centrifugal Pump

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Journal of Thermal Science 2009年第1期18卷 48-53页

作者： Ryunosuke Kawashima mitsuo Uno Toshiaki Kanemoto Department of mechanical engineering Kyushu Kyoritsu University 1-8 Jiyugaoka Faculty engineering Kyushu Institute of Technology

The shaft-less impeller of the centrifugal pump, which is driven by the magnetic induction, was developed. Theimpeller rotates under the floating condition without any control device. The floating condition of the impeller isrealized by utilizing the pressure in pump casing. The pump performance and the rotational behavior of the impellerwere investigated experimentally. It has found that the floating position of the impeller become quite unstablein a partial flow rate operation. And the pressure distribution at the casing wall affects the rotational posture ofthe impeller. This paper presents the effect of the casing treatment on the rotational posture of the impeller and thepressure distribution. The reasonable casing treatment is available for the stable rotational posture of the impeller.

关键词： Centrifugal pump Impeller Magnetic induction Casing treatment Passive control

EFFECT OF TRIAXIAL STRESS CONSTRAINT ON THE DEFORMATION AND FRACTURE OF POLYMERS

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Acta Mechanica Sinica 2002年第5期18卷 480-493页

作者：王铁军 Kikno Kishimoto mitsuo Notomi Department of Engineering Mechanics Xi'an Jiaotong UniversityXi'an 710049China Department of Mechanical and Control Engineering Tokyo Institute of TechnologyTokyo 152-8552Japan Department of Mechanical Engineering Meiji UniversityKawasaki-shiKanagawa 214-8571Japan

One purpose of this paper is to give a brief overview on the research status of deformation,fracture and toughening mechanisms of polymers,including experimental,theoretical and numerical *** is on the more recent progresses of micromechanics of rubber particle cavitation and crazing,and the de- velopment of fracture criteria for ductile polymers. The other purpose is to study the effect of triaxial stress constraint on the deforma- tion and fracture behavior of ***(PC),acrylonitrile-butadiene- styrene(ABS)and PC/ABS alloy are considered in this investigation.A series of circumferentially blunt-notched bars are used to experimentally generate different tri- axial stress *** fracture surfaces of specimens with different notch radius are examined by scanning electron microscope(SEM)to study the fracture and tough- ening mechanisms of polymer *** is shown that the triaxial stress constraint has a significant effect on the deformation,fracture and toughening of PC,ABS and PC/ABS *** will also discuss the extent to which a micromechanies criterion proposed by the first author can serve as a fracture criterion for ductile polymers. A new ductile fracture parameter is emphasized,which can be employed to evaluate the fracture ductility of *** state independence of the parameter for the PC,ABS and PC/ABS alloy has been experimentally verified.

关键词： deformation fracture toughening cavitation crazev micromechanics PC ABS polymer alloy

Is resilience socially emerging or embedded?A review of“resilience”under climate change in Sri Lanka

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Journal of Safety Science and Resilience 2021年第4期2卷 258-266页

作者： Ryo Tsuchida Shutaro takeda Graduate School of Advanced Integrated Studies in Human Survivability Kyoto UniversityKyotoJapan

Since the advent of a new academic regime that examines the nexus of humans and water,resilience studies of the coevolution of human-water systems have advanced rapidly because of the climate ***,the concept of resilience poses a new social *** study analyzes the gap in resilience studies through a Sri Lankan water-related disaster research ***,the authors discuss the potential and challenges for resilience evolution under climate change in Sri *** the nuance of resilience,the review showed that resilience is complementarily emerging and embedded in culture and society,such as traditional knowledge and local history,and from scientific research-oriented translation and wide international policy view in *** is the accumulation of stable states and supporting mechanisms found in the interaction between normal phases and emergencies in elements unique to the *** study suggests that it is critical to support the resilience and mechanisms of the whole and each layer,leveraging the diverse and sustainable livelihoods in the Sri Lankan context against climate change.

关键词： Resilience Climate change Water-related disasters Adaptation Sri Lanka