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Automatic registration of MLS point clouds and SfM meshes of urban area

Geo-Spatial Information Science 2016年第3期19卷 171-181页

作者： Reiji Yoshimura Hiroaki Date Satoshi Kanai Ryohei Honma kazuo Oda Tatsuya Ikeda Graduate School of Information Science and Technology Hokkaido UniversitySapporoJapan Asia Air Survey Co. LtdKawasakiJapan

Recent advances in 3D scanning technologies allow us to acquire accurate and dense 3D scan data of large-scale environments ***,there are various methods for acquiring largescale 3D scan data,such as Mobile Laser Scanning(MLS),Airborne Laser Scanning,Terrestrial Laser Scanning,photogrammetry and Structure from Motion(SfM).Especially,MLS is useful to acquire dense point clouds of road and road-side objects,and SfM is a powerful technique to reconstruct meshes with textures from a set of digital *** this research,a registration method of point clouds from vehicle-based MLS(MLS point cloud),and textured meshes from the SfM of aerial photographs(SfM mesh),is proposed for creating high-quality surface models of urban areas by combining *** general,SfM mesh has non-scale information;therefore,scale,position,and orientation of the SfM mesh are adjusted in the registration *** our method,first,2D feature points are extracted from both SfM mesh and MLS point *** process consists of ground-and building-plane extraction by region growing,random sample consensus and least square method,vertical edge extraction by detecting intersections between the planes,and feature point extraction by intersection tests between the ground plane and the ***,the corresponding feature points between the MLS point cloud and the SfM mesh are searched efficiently,using similarity invariant features and ***,the coordinate transformation is applied to the SfM mesh so that the ground planes and corresponding feature points are ***,scaling Iterative Closest Point algorithm is applied for accurate *** results for three data-sets show that our method is effective for the registration of SfM mesh and MLS point cloud of urban areas including buildings.

关键词： Registration MLS point clouds SfM mesh urban area hash similarity invariant feature

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IMMERSIVE VR VISUALIZATIONS BY VFIVE: PART 2: APPLICATIONS

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International Journal of Modeling, Simulation, and Scientific Computing 2013年第S01期4卷 54-69页

作者： AKIRA KAGEYAMA NOBUAKI OHNO SHINTARO KAWAHARA kazuo KASHIYAMA HIROAKI OHTANI Graduate School of System Informatics Kobe University Kobe 657-8501Japan Graduate School of Simulation Studies University of Hyogo Kobe 650-0047Japan Earth Simulator Center Japan Agency for Marine-Earth Science and Technology Yokohama 236-0001 Japan Department of Civil and Environmental Engineering Chuo University Bunkyo-ku 112-8551Japan National Institute for Fusion Science Toki 509-5292 Japan The Graduate University for Advanced Studies(SOKENDAI)Toki 509-5292Japan

VFIVE is a scientific visualization application for CAVE-type immersive virtual reality(VR)*** source codes are freely *** is used as a research tool in various VR *** also lays the groundwork for developments of new visualization software for *** this paper,we pick up five CAVE systems in four different institutions in *** of VFIVE in each CAVE system are *** emphases will be placed on scientific and technical achievements made possible by VFIVE.

关键词： Virtual reality CAVE system immersive display system.

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Sintering behavior of aluminum nitride powder prepared by self-propagating high-temperature synthesis method

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Rare Metals 2018年第12期37卷 1091-1095页

作者： Liang Qiao Shu-Wen Chen Li-Qiang Jiang kazuo Shinozaki Sheng-Lei Che Research Center of Magnetic and Electronic Materials College of Materials Science and Engineering Zhejiang University of Technology Department of Metallurgy and Ceramics Science Tokyo Institute of Technology

Fully dense aluminum nitride(AIN) ceramics were synthesized by self-propagating high-temperature synthesis(SHS) method using AIN powder as raw material with Y2O3additive. The sintering behavior was studied at different sintering temperatures and additive contents. The change of phase compositions, secondary phase distributions and grain morphologies during sintering process were investigated. It is shown that fully dense ceramics using AIN powder prepared by SHS method can be obtained when the sintering temperature is above 1830 ℃. Both Y2O3content and sintering temperature have an important influence on the formation of Y-Al-O phase and grain shape. When Y2O3content is identified, the grain morphology converts from polyhedron into sphere-like shape with the rise of sintering temperature. At a certain sintering temperature,the grain size decreases with the increase in Y2O3content. The influencing mechanisms of different YAl-O secondary phases and sintering temperatures on the grain size and morphology were also discussed based on the experimental results.

关键词： Self-propagating high-temperature synthesis AlN Secondary phase Liquid-phase sintering

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Association between tear film break up time and blink interval in visual display terminal users

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International Journal of Ophthalmology(English edition) 2018年第10期11卷 1691-1697页

作者： Miki Uchino Motoko Kawashima Yuichi Uchino kazuo Tsubota Norihiko Yokoi Department of Ophthalmology Keio University School of Medicine Department of Ophthalmology Kyoto Prefectural University School of Medicine

AIM：To investigate the association between tear film break up time（TBUT）and blinking interval in visual display terminal（VDT）***：Nine hundred and thirty VDT users underwent dry eye testing,and functional visual acuity（FVA）*** blinking interval during FVA was compared with *** with longer blinking interval than TBUT were considered as unstable tear *** regression analysis revealed the risk factors for unstable tear ***：Among 930 workers,858 subjects（92.3%）participated in this *** 80% of the subjects were categorized into the unstable tear *** tear group has significantly lower Schirmer values and TBUT（17.5±11.6 vs 21.1±11.5 mm,3.7±2.6 vs 5.7±2.7s,both P〈0.001）.There were no significant differences in epithelial staining or severity of *** regression showed that over 40y was a risk for being unstable tear group[odds ratio（OR）=1.53;95%confidence interval（CI）=1.06-2.20].Contact lens use was protective factor for being in the unstable tear group（OR=0.37;95%CI=0.26-0.53）.CONCLUSION：Subjects with shorter TBUT than blinking interval are prevalent among VDT *** over the age of 40 shows an increased risk for unstable tear film.

关键词： dry eye disease blink interval tear film break up time visual display terminal use

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Postsurgical radiation therapy for gastric carcinosarcoma with c-kit expression: A case report

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World Journal of Gastroenterology 2015年第9期21卷 2830-2835页

作者： Takeshi Gohongi Hiroyuki Iida Naoto Gunji kazuo Orii Takesaburo Ogat Department of Surgery and Pathology Tsukuba-Gakuen HospitalIbaraki 305-0857Japan

Gastric carcinosarcomas are rare morphologically biphasic tumors, consisting of carcinoma and sarcoma components, with a poor clinical *** we report the case of a 70-year-old man with advanced Borrmann type Ⅲ carcinosarcoma arising from the upper body of the stomach with extensive lymph node metastasis who underwent a total, but palliative, *** showed the tumor consisted of a biphasic structure of tubular adenocarcinoma and spindle *** revealed sarcoma cells expressing c-kit(CD117) and CD34, which are criteria for gastrointestinal stromal *** months after the surgical operation, tumor metastases had extended to the hepatohilar, retroperitoneal and mediastinal lymph *** therapy of 50 Gy markedly decreased the size of each of these nodes and reduced the risk of respiratory complications and ***, the patient died of respiratory failure due to bronchopneumonia with multiple lung metastases 22 mo after *** revealed severe necrosis in most of the lymph nodes with tumor *** therapy combined with gastrectomy should be considered to improve survival in patients with gastric carcinosarcomas that express c-kit.

关键词： CD34 C-kit Gastric carcinosarcoma Radiation therap

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The 2023 Turkey earthquake doublet: Earthquake relocation, seismic tomography, and stress field inversion

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Earth and Planetary Physics 2024年第3期8卷 535-548页

作者： HuiLi Zhan Ling Bai Bagus Adi Wibowo ChaoYa Liu kazuo Oike Yuzo Ishikawa State Key Laboratory of Tibetan Plateau Earth System Environment and Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Center of Earthquake and Tsunami Agency of MeteorologyClimatology and GeophysicsJakarta 10610Indonesia University of Shizuoka Shizuoka 422-8526Japan Shizuoka University Shizuoka 422-8529Japan

On February 6,2023,two earthquakes with magnitudes of M_(W) 7.8 and M_(W) 7.5 struck southeastern Turkey,causing significant casualties and economic *** seismic events occurred along the East Anatolian Fault Zone,a convergent boundary between the Arabian Plate and the Anatolian *** this study,we analyze the M_(W) 7.8 and M_(W) 7.5 earthquakes by comparing their aftershock relocations,tomographic images,and stress field *** earthquakes were localized in the upper crust and exhibited steep dip ***,the aftershocks occurred either close to the boundaries of low and high P-wave velocity anomaly zones or within the low P-wave velocity anomaly *** East Anatolia Fault,associated with the M_(W) 7.8 earthquake,and the SürgüFault,related to the M_(W) 7.5 earthquake,predominantly experienced shear ***,their western sections experienced a combination of strike-slip and tensile stresses in addition to shear *** ruptures of the M_(W) 7.8 and M_(W) 7.5 earthquakes appear to have bridged a seismic gap that had seen sparse seismicity over the past 200 years prior to the 2023 Turkey earthquake sequence.

关键词： Turkey earthquake doublet earthquake relocation seismic tomography stress field seismicity

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Bipolar hemiarthroplasty for femoral neck fracture using the direct anterior approach

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World Journal of Orthopedics 2013年第2期4卷 85-89页

作者： Tomonori Baba Katsuo Shitoto kazuo Kaneko Department of Orthopedic Surgery Juntendo University School of Medicine Tokyo 113-8421 Japan Department of Orthopedic Surgery Juntendo University Urayasu Hospital Chiba 279-0021Japan

AIM: To evaluate whether walking ability recovers early after bipolar hemiarthroplasty(BHA) using a direct anterior ***: Between 2008 and 2010, 81 patients with femoral neck fracture underwent BHA using the direct anterior approach(DAA) or the posterior approach(PA). The mean observation period was 36 mo. The age, sex, body mass index(BMI), time from admission to surgery, length of hospitalization, outcome after discharge, walking ability, duration of surgery, blood loss and complications were compared. RESULTS: There was no significant difference in the age, sex, BMI, time from admission to surgery, length of hospitalization, outcome after discharge, duration of surgery and blood loss between the two groups. Two weeks after the operation, assistance was not necessary for walking in the hospital in 65.0% of the patients in the DAA group and in 33.3% in the PA group(P < 0.05). As for complications, fracture of the femoral greater trochanter developed in 1 patient in the DAA group and calcar crack and dislocation in 1 patient each in the PA ***: DAA is an approach more useful for BHA for femoral neck fracture in elderly patients than total hip arthroplasty in terms of the early acquisition of walking ability.

关键词： Direct anterior approach Bipolar hemiarthroplasty Posterior approach Femoral neck fracture Muscle presentation Walking ability

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The effect of alkyl chain branching positions on the electron mobility and photovoltaic performance of naphthodithiophene diimide(NDTI)-based polymers

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Science China Chemistry 2019年第12期62卷 1649-1655页

作者： Jing Yang Ning An Su Sun Xiangnan Sun Masahiro Nakano kazuo Takimiya Bo Xiao Erjun Zhou CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China RIKEN Center for Emergent Matter Science(CEMS) 2-1 HirosawaWakoSaitama 351-0198Japan Henan Institutes of Advanced Technology Zhengzhou UniversityZhengzhou 450003China

Conjugated polymers are widely used in organic optoelectronic devices due to their solution processability, thermal stability and structural diversity. Generally, alkyl side chains must be utilized to increase the solubility of final polymers in the processing solvent. However, the effects of different type alkyl chains on the properties of n-type photovoltaic polymers have rarely been investigated. In this article, we synthesized three naphthodithiophene diimide（NDTI） based polymers containing bulky alkyl chains with different branching position, named as NDTI-1, NDTI-2 and NDTI-3, respectively. We systematically investigated the effect of different branching point on the molecular packing, charge transport and photovoltaic performance. When moving the branching point away from the backbone, the intermolecular interaction became stronger, which could be proved by 2D grazing incidence wide angle X-ray scattering（GIWAXS） measurement. Therefore, the electron mobilities in organic field-effect transistors gradually increased from 2.11×10-3 cm2 V/-1 s-1 for NDTI-1 to 4.70×10-2 cm2 V/-1 s-1 for NDTI-2 and 9.27×10-2 cm2 V/-1 s-1 for NDTI-3,which are quite high values for polymers with face-on orientation. In addition, the NDTI-2 and NDTI-3 thin films exhibited redshifted absorption spectra compared with NDTI-1. When blending with three classic donor polymers PBDB-T, PTB7-Th and PE61, NDTI-2 based devices always showed the higher power conversion efficiencies（PCEs） than the other two polymers（beside the comparable result of PTB7-Th:NDTI-3 combination） as a result of the high photocurrent response and high fill factor. Our results indicate that bulky alkyl chain with branching point at 2-position should be a good and safe choice for the design of naphthodithiophene diimide-based and even naphthalene diimide-based n-type photovoltaic polymers.

关键词： all-polymer solar cells branching positions naphthodithiophene diimide(NDTI) PBDB-T PTB7-Th

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A new electric field mill array with each of the mill’s rotor controlled precisely by a GPS module:Equipment and initial results

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Earth and Planetary Physics 2024年第2期8卷 423-435页

作者： Kozo Yamashita Hironobu Fujisaka DaoHong Wang Hiroyuki Iwasaki kazuo Yamamoto Koichiro Michimoto Masashi Hayakawa Department of Production Systems Engineering and Sciences Komatsu UniversityNu 1-3 Shicho-machiKomatsuIshikawa 923-8511Japan Fujisaka Technology Office 1058-5 Yoshizawa-choOhta-shiGunma 373-0019Japan Department of Electrical Electronic and Computer EngineeringGifu University1-1 YanagidoGifu CityGifu 501-1193Japan Cooperative Faculty of Education Gunma University4-2-Aramaki-machiMaebashiGunma 371-8510Japan Department of Electrical and Electronic Engineering Chubu University1200 Matsumoto-choKasugaiAichi 487-8501Japan Independent Researcher Kosenba Town 2-44-11-406Kawagoe CitySaitama350-0036Japan Advanced Wireless&Communications Research Center The University of Electro-Communications1-5-1 ChofugaokaChofuTokyo 182-8585Japan

We have newly designed an electrostatic sensor,called an electric field mill(EFM),to simplify the estimation of the charge position and charge amount transferred by lightning *** is necessary for this remote estimation of the transferred charge to measure electric field changes caused by charge loss at the time of a lightning strike at multiple *** multiple-station measurement of electric field changes,not only speed but also phase for exposure and shielding of the sensing plates inside each EFM of the array should be synchronized to maintain the sensitivities of the deployed ***,there is no such EFM with specified speed and phase control performance of the rotary ***,we developed a new EFM in which the rotary mechanism was controlled consistently to within 3%error by a GPS *** EFMs had been distributed in the Hokuriku area of Japan during the winter season of 2022-2023 for a test *** we describe the design and a simple calibration method for our new EFM *** analysis method based on the assumption of a simple monopole charge structure is also *** validation,locations of assumed point charges were compared with three-dimensional lightning mapping data estimated by radio observations in the MF-HF *** results indicated the validity to estimate transferred charge amounts and positions of winter cloud-to-ground lightning discharges with our new EFM array.

关键词： lightning electrostatic field electric field mill electric field change

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Simultaneous augmentation of muscle and bone by locomomimetism through calcium-PGC-1αsignaling

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Bone Research 2022年第4期10卷 770-783页

作者： Takehito Ono Ryosuke Denda Yuta Tsukahara Takashi Nakamura kazuo Okamoto Hiroshi Takayanagi Tomoki Nakashima Department of Cell Signaling Graduate School of Medical and Dental SciencesTokyo Medical and Dental University(TMDU)Yushima 1-5-45Bunkyo-kuTokyo 113-8549Japan Department of Orthopaedic Surgery The Jikei University School of Medicine3-25-8 Nishi-ShimbashiMinato-kuTokyo 105-8461Japan School of Dentistry Tokyo Medical and Dental University(TMDU)Yushima 1-5-45Bunkyo-kuTokyo 113-8549Japan Department of Biochemistry Tokyo Dental CollegeKandamisakicho 2-9-18Chiyoda-kuTokyo 101-0061Japan Department of Osteoimmunology Graduate School of Medicine and Faculty of MedicineThe University of TokyoHongo 7-3-1Bunkyo-kuTokyo 113-0033Japan Department of Immunology Graduate School of Medicine and Faculty of MedicineThe University of TokyoHongo 7-3-1Bunkyo-kuTokyo 113-0033Japan

Impaired locomotion has been extensively studied worldwide because those afflicted with it have a potential risk of becoming *** exercise at times can be an effective remedy for frailty,but exercise therapy cannot be applied in all clinical *** is safer than exercise,but there are no drugs that reinforce both muscle and bone when administered *** medications increase the risk of adverse events;thus,there is a need for individual drugs targeting both *** this end,we established a novel sequential drug screening system and identified an aminoindazole derivative,locamidazole(LAMZ),which promotes both myogenesis and osteoblastogenesis while suppressing *** of this drug enhanced locomotor function,with muscle and bone significantly ***,LAMZ induced Mef2c and PGC-1αin a calcium signaling–dependent *** this signaling is activated upon physical exercise,LAMZ mimics physical ***,LAMZ is a promising therapeutic drug for locomotor diseases,including sarcopenia and osteoporosis.

关键词： drugs clinical diseases

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