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Effects of pore interconnectivity on bone regeneration in carbonate apatite blocks

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Regenerative Biomaterials 2022年第1期9卷 30-40页

作者： Maab Elsheikh Ryo Kishida Koichiro hayashi Akira Tsuchiya masaya Shimabukuro and Kunio Ishikawa Department of Biomaterials Faculty of Dental ScienceKyushu University3-1-1 Maidashi Higashi-kuFukuoka 812-8582Japan

Porous architecture in bone substitutes,notably the interconnectivity of pores,is a critical factor for bone ***,controlling the pore interconnectivity while maintaining the microarchitecture has not yet been achieved using conventional methods,such as ***,we fabricated a porous block using the crystal growth of calcium sulfate dihydrate,and controlled the pore interconnectivity by limiting the region of crystal *** calcium sulfate dihydrate blocks were transformed to bone apatite,carbonate apatite(CO_(3)Ap)through dissolution–precipitation ***,CO_(3)Ap blocks with 15%and 30%interconnected pore volumes were obtained while maintaining the microarchitecture:they were designated as CO_(3)Ap-15 and CO_(3)Ap-30,*** 4 weeks after implantation in a rabbit femur defect,new bone formed throughout CO_(3)Ap-30,whereas little bone was formed in the center region of CO_(3)*** 12 weeks after implantation,a large portion of CO_(3)Ap-30 was replaced with new bone and the boundary with the host bone became *** contrast,CO_(3)Ap-15 remained in the defect and the boundary with the host bone was still ***,the interconnected pores promote bone ingrowth,followed by replacement of the material with new *** findings provide a useful guide for designing bone substitutes for rapid bone regeneration.

关键词： bone substitutes carbonate apatite pore interconnectivity bone regeneration

Psychological potential field and human eye fixation on binary line-drawing images: A comparative experimental study

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Computational Visual Media 2020年第2期6卷 205-214页

作者： Naoyuki Awano Yuki hayashi Osaka University of Economics OsakaOsaka533-8533Japan Osaka Prefecture University SakaiOsaka599-8531Japan

Quantitatively evaluating the psychological and perceptual effects of objects is an important issue,but is difficult. In cognitive studies, the psychological potential field(PPF), which represents psychological intensities in vision and can be calculated by applying computational algorithms to digital images, may help with this issue. Although studies have reported using the PPF to evaluate psychological effects, such as impressions, detailed investigations on how the PPF represents psychological perception and its limitations have not yet been performed. Another relevant tool is the fixation map, which visualizes human eye fixations;this map is generated from actual measurements acquired by eye-tracking and does not represent psychological effects directly. Although the PPF and the fixation map are based on visual imaging, they have never been compared. In this paper, we do so for the first time, using psychological and perceptual properties of line-drawing images. The results demonstrate the difference between these methods, including their representation of different properties with respect to visual perception. Moreover, the similarity between the two methods highlights the possibility of assessing perceptual phenomena such as categorization and cognition of objects based on human vision.

关键词： psychological potential field(PPF) eye fixation eye-tracking visual perception line drawing

Finite Abelian Groups of K3 Surfaces with Smooth Quotient

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Chinese Annals of Mathematics,Series B 2023年第1期44卷 99-162页

作者： Taro hayashi Faculty of Agriculture Kindai UniversityNakamaticho 3327-204NaraNara 631-8505Japan

The quotient space of a K3 surface by a finite group is an Enriques surface or a rational surface if it is *** groups where the quotient space are Enriques surfaces are *** this paper,by analyzing effective divisors on smooth rational surfaces,the author will study finite groups which act faithfully on K3 surfaces such that the quotient space are *** particular,he will completely determine effective divisors on Hirzebruch surfaces such that there is a finite Abelian cover from a K3 surface to a Hirzebrunch surface such that the branch divisor is that effective ***,he will decide the Galois group and give the way to construct that Abelian cover from an effective divisor on a Hirzebruch ***,he studies the same theme for Enriques surfaces.

关键词： K3 surface Finite Abelian group Abelian cover of a smooth rational surface

Changes of integrin expression in rat hepatocarcinogenesis induced by 3′-Me-DAB

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World Journal of Gastroenterology 2000年第2期6卷 231-233页

作者： hayashi KeiKi Department of Pathology Okayarna UniversityJapan

AIM To investigate the expression of integrinsin rats liver during 3’-Me-DAB inducedhepatocarcinogenesis and to find out therelationship between integrins and liver *** The expressions of integrins α1,α2,α3 and α5 and epidermal keratin（EK）wereobserved by immunohistochemical PAP *** In the normal liver tissues,hepatocytes express integrins α1 and α5 and inthe bile duct epithlium,*** liver cirrhosis,hepatocytes highly express integrins α1,α2,α3and α5 and in hyperplastic bile duct epithelium,integrins α1,α5 and *** of integrinsα1,α2,α3 and α5 were obviously decreased in thepreneoplastic nodules and primary carcinomabut expressions of integrins α1 and α5 inmetastasis in the lung and diaphragma werehigher than those in primary *** Integrins α1 and α5 may play amajor role in chemically inducedhepatocarcinogenesis and metastasis in rats.

关键词： integrins 3′-Me-DAB liver neoplasm/chemically induced neoplasm metastasis rats

Re-evaluation of physical interaction between plant peroxisomes and other organelles using live-cell imaging techniques

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Journal of Integrative Plant Biology 2019年第7期61卷 836-852页

作者： Kazusato Oikawa Makoto hayashi Yasuko hayashi Mikio Nishimura Biomacromolecules Research Team RIKEN Center for Sustainable Resource Science2-1 HirosawaWakoSaitama 351-0198Japan Department of Bioscience Nagahama Institute of Bio-Scie nee and Technology1266 Tamura-ChoNagahama 526-0829Japan Department of Biology Faculty of scienceNiigata UniversityNiigata 950-2181Japan Department of Cell Biology National Institute for Basic BiologyOkazaki 444-8585Japan

The dynamic behavior of organelles is essential for plant survival under various environmental conditions. Plant organelles, with various functions,migrate along actin filaments and contact other types of organelles, leading to physical interactions at a specific site called the membrane contact site. Recent studies have revealed the importance of physical interactions in maintaining efficient metabolite flow between *** this review, we first summarize peroxisome function under different environmental conditions and growth stages to understand organelle interactions. We then discuss current knowledge regarding the interactions between peroxisome and other organelles, i.e., the oil bodies, chloroplast, and mitochondria from the perspective of metabolic and physiological regulation, with reference to various organelle interactions and techniques for estimating organelle interactions occurring in plant cells.

关键词： physical interaction plant peroxisomes live-cell

Asphericalizing the Light Collection Mirror for the 200-Point Thomson Scattering Diagnostic Installed on the Large Helical Device

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Plasma Science and Technology 2011年第4期13卷 415-419页

作者： Kazumichi NARIHARA Hiroshi hayashi National Institute for Fusion Science

Shown is a possibility to make the image of a laser beam over a distance of 2.5 m, formed by the spherical multi-segment mirror installed in LHD, twice sharper by suitably adjusting the inclination of each segment mirror, which is equivalent to making the mirror surface aspherical. This will further enhance the attractiveness of a mirror-based Thomson scattering system.

关键词： Thomson scattering LHD aspherical mirror

Recommender system for discovery of inorganic compounds

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npj Computational Materials 2022年第1期8卷 2084-2090页

作者： Hiroyuki hayashi Atsuto Seko Isao Tanaka Department of Materials Science and Engineering Kyoto UniversityKyotoJapan Nano Research Laboratory Japan Fine Ceramics Center(JFCC)NagoyaJapan

A recommender system based on experimental databases is useful for the efficient discovery of inorganic ***,we review studies on the discovery of as-yet-unknown compounds using recommender *** first method used compositional descriptors made up of elemental *** compositions registered in the inorganic crystal structure database(ICSD)were supplied to machine learning for binary *** other method did not use any descriptors,but a tensor decomposition technique was *** predictive performance for currently unknown chemically relevant compositions(CRCs)was determined by examining their presence in other *** to the recommendation,synthesis experiments of two pseudo-ternary compounds with currently unknown structures were ***,a synthesis-condition recommender system was constructed by machine learning of a parallel experimental data-set collected in-house using a polymerized complex *** scores for unexperimented conditions were then *** experiments under the targeted conditions found two yet-unknown pseudo-binary oxides.

关键词： method. inorganic system

SYSTEMATIC DESIGN OF SINGLE CARRIER OVERLAP FREQUENCY DOMAIN EQUALIZATION

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Journal of Systems Science & Complexity 2010年第1期23卷 50-60页

作者： Wladimir BOCQUET Kazunori hayashi Hideaki SAKAI Oranqe Labs Tokyo France Telecom Japan Co.Ltd Department of Systems Science Graduate School of InformaticsKyoto University

This paper proposes a systematic design method of overlap frequency domain equalization(FDE) for single carrier (SC) transmission without a guard interval (GI).Based on the analysis of signal-to-interference-plus-noise ratio (SINR) of the equalizer output for each symbol,the authors adaptivelydetermine the block of the overlap FDE,where the block is defined as a set of symbols at the equalizeroutput with sufficiently low error rate,for a certain fixed sliding window size,which corresponds toa fast Fourier transform (FFT) window *** proposed method takes advantage of the fact thatthe utility part of the equalized signal is localized around the center of the FFT *** addition,the authors also propose to adjust the block size in order to control the computational complexity ofthe equalization per processed sample associating with the average bit error rate (BER) of the *** results show that the proposed scheme can achieve comparable BER performance to theconventional SC-FDE scheme with sufficient GI insertion for both the coded and uncoded cases withvarious modulation levels,while requiring lower computational complexity compared to the SC overlapFDE transmission with the fixed block.

关键词： Overlap frequency domain equalization single carrier transmission SINR.

Numerical Modeling of Neotectonic Movements and State of Stresses in the Central Seismic Gap Region,Garhwal Himalaya

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Journal of Mountain Science 2008年第4期5卷 279-298页

作者： Ganesh Raj JOSHI Daigoro hayashi Simulation Tectonics Laboratory Faculty of ScienceUniversity of the RyukyusOkinawa 903-0213Japan

This paper presents finite element modeling （FEM） to simulate the present-day stress field and crustal deformation using NE-SW structural section in the central Seismic Gap region of the Garhwal Himalaya. Our study deals with the effect of geometrical characteristics and rock layer parameters on the upper crust. Modeling results show that two types of tectonic regimes developed in the central Seismic Gap region： the geotectonics of the northern part has been controlled by regional compression, whereas southern part is characterized by regional extension. Correspondingly, thrust faults are induced in the northern part and normal faults are extensively developed in the southern front. Those evidences noticeably indicate that the compressive tectonic environment of the Himalaya becomes change into the extensional tectonic regime in its front. The computed shear stress accumulation along the northern fiat of Main Himalayan Thrust （MHT） implies that considerable amount of interseismic stress is building up along the MHT system in the Himalaya, which ultimately release through the possible future great Himalayan earthquake （M 〉 8）. The comparison between our modeled stress field, faulting pattern and horizontal shortening rate with the distribution of the microseismic events, focal mechanism solutions, active faulting and GPS data in the central Seismic Gap region shows good agreement.

关键词： Neotectonic deformation stress distribution FE modeling central Seismic Gap NW-Himalaya