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Diameter Measurements of the Upper Parts of Trees Using an Ultra-Telephoto Digital Photography System

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Open Journal of Forestry 2014年第4期4卷 316-326页

作者： Akira Shimizu Shigeki Yamada Yuichiro arita Forestry and Forest Products Research Institute Tsukuba Japan Kyushu Research Centre Forestry and Forest Products Research Institute Kumamoto Japan Ogunimachi Forestry Cooperative Oguni-Machi Japan

We develop a new technique to measure the exact upper diameters of trees that is comparatively simple and inexpensive. We can measure the diameters of entire tree trunks efficiently and with high precision. The system uses a digital camera with a ~15 - 30× telephoto lens to take a photograph that can be used for measuring the diameter of the upper part of a comparatively slender tree trunk. Since this method requires a measuring distance and the height of the target point in the image, a range finder capable of measuring angles was combined with the main digiscoping system. A range finder sensor uses a laser and makes a 360 degree angle of observation possible. The diameter of a target position of the objective tree can be obtained by measuring the digital image using image editing software and calculations from spreadsheet software. We focus on the Japanese cedar species in the southwestern part of Japan. Photographic measurements were obtained prior to thinning. The estimates that we obtained largely agree with the true measurements of all trees. With regard to the estimated accuracy of all measured trees, the maximum error ratio was 7.0% (1.45 cm), with a ~2% - 4% error for most of the estimated results. Although the absolute value of the estimation error was 1.87 cm (5.3%) at the maximum (9.87 m in height and 35.5 cm in diameter), an estimation accuracy of <1 cm was reproduced in almost all measurements except for the extreme hypertrophy portion by butt swelling.

关键词： Digital Camera Image Editing Software Magnifications Spotting Scope Taper Curve Upper Diameter

Optical trapping with structured light: a review

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Advanced Photonics 2021年第3期3卷 4-43页

作者： Yuanjie Yang Yu-Xuan Ren Mingzhou Chen Yoshihiko arita Carmelo Rosales-Guzmán University of Electronic Science and Technology of China School of PhysicsChengduChina University of Hong Kong Department of Electrical and Electronic EngineeringHong Kong SARChina University of St Andrews SUPASchool of Physics and AstronomySt AndrewsUnited Kingdom Chiba University Molecular Chirality Research CenterChibaJapan Centro de Investigaciones enÓptica A.C.LeónGuanajuatoMexico Harbin University of Science and Technology Wang Da-Heng Collaborative Innovation Center for Quantum Manipulation and ControlHarbinChina

Optical trapping describes the interaction between light and matter to manipulate micro-objects through momentum *** the case of 3D trapping with a single beam,this is termed optical *** tweezers are a powerful and noninvasive tool for manipulating small objects,and have become indispensable in many fields,including physics,biology,soft condensed matter,among *** the early days,optical trapping was typically accomplished with a single Gaussian *** recent years,we have witnessed rapid progress in the use of structured light beams with customized phase,amplitude,and polarization in optical *** beam properties,such as phase singularities on-axis and propagation invariant nature,have opened up novel capabilities to the study of micromanipulation in liquid,air,and *** summarize the recent advances in the field of optical trapping using structured light beams.

关键词： optical trapping structured beams vortex beam optical angular momentum.

Observation of Magnetic Domain Structures of Magnetic Thin Films by the Lorentz Electron Microscopy

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International Journal of Minerals,Metallurgy and Materials 1999年第2期13卷 119-124页

作者： A. Okada M Chimura K Hamada M arita I. Ishida(Advanced Materials Science Laboratory, Division of Electronics and information Engineering, Graduate School of Engineering, Hokkaido University,Sapporo 060-8628, Japan) Division of Electronics and Information Engineering Graduate School of Engineering Hokkaido University Sapporo 060-8628 Japan

The microstructure change in thin NiFe/Cu/NiFe films during the magnetization process was observed by the Lorentz electronmicroscopy. TWo types of films were prepared: (1) one NiFe layer with anisotropy and the other layer without, and (2) both NiFe layershave anisotropy normal each other. The domain wall migration and magnetization rotation processes in each of NiFe layers could be observed separately. The presence of magnetic anisotropy in the magnetic layer effectively controls the behavior of magnetic domains. Theinteraction between the two NiFe layers of the film could be observed not so strong in the present experiment.

关键词： magnetic domain domain wall Lorentz microscopy multi-layers thin films hysteresis loop permalloy film

Rheological Properties and Self-Assembled Structures of Newly Synthesized Amide Organogelators, Butane 1,2,3,4-Tetracarboxamides, in Isododecane

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Advances in Materials Physics and Chemistry 2014年第12期4卷 267-274页

作者： Yuichi Sakanishi Taisuke arita Mami Itoh Takashi Saeki R & D Center Organic Chemical Products Company DAICEL Corporation Ohtake Japan Graduate School of Science and Engineering Yamaguchi University Ube Japan

The objectives of this study were to develop organogelators suitable for industrial use and to probe the viscosity-increasing mechanisms of such organic compounds. Butane 1,2,3,4-tetracar-boxamides, new organogelators that each has four chemical side chains, were synthesized. Two oleyl groups, each with another two side chains that varied from C4 to C18, were introduced to control the solubility and crystallinity of the compounds, and their solubility and rheological properties in isododecane were evaluated. The rheological properties of different amide compounds, N,N’,N’’,N’’’-1,2,4,5-tetra alkyl/alkenyl pyromellitamides with the same four chemical side chains, were also obtained to consider the skeleton’s effect on self-assembled structures due to hydrogen bonding among amide groups. The viscosity-increasing mechanism of the compounds was discussed through linkage of the molecular design, rheological evaluation, and morphological observations in this paper.

关键词： Organic Compounds Chemical Synthesis Viscoelastic Property Transmission Electron Microscope (TEM) Self-Assembled Structure

Detection of fusion gene in cell-free DNA of a gastric synovial sarcoma

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World Journal of Gastroenterology 2018年第8期24卷 949-956页

作者： Shinpei Ogino Hirotaka Konishi Daisuke Ichikawa Junichi Hamada Katsutoshi Shoda Tomohiro arita Shuhei Komatsu Atsushi Shiozaki Kazuma Okamoto Sanae Yamazaki Satoru Yasukawa Eiichi Konishi Eigo Otsuji Division of Digestive Surgery Department of Surgery Kyoto Prefectural University of Medicine Department of Surgical Pathology Kyoto Prefectural University of Medicine

Synovial sarcoma(SS) is genetically characterized by chromosomal translocation, which generates SYT-SSX fusion transcripts. Although SS can occur in any body part, primary gastric SS is substantially rare. Here we describe a detection of the fusion gene sequence of gastric SS in plasma cell-free DNA(cf DNA). A gastric submucosal tumor was detected in the stomach of a 27-year-old woman and diagnosed as SS. Candidate intronic primers were designed to detect the intronic fusion breakpoint and this fusion sequence was confirmed in intron 10 of SYT and intron 5 of SSX2 by genomic polymerase chain reaction(PCR) and direct sequencing. A locked nucleic acid(LNA) probe specificto the fusion sequence was designed for detecting the fusion sequence in plasma and the fusion sequence was detected in preoperative plasma cfD NA, while not detected in postoperative plasma cfD NA. This technique will be useful for monitoring translocation-derived diseases such as SS.

关键词： Fusion gene Gastric synovial sarcoma Plasma Cell free DNA

Automated liver tumor detection in abdominal ultrasonography with a modified faster region-based convolutional neural networks(Faster R-CNN)architecture

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Hepatobiliary Surgery and Nutrition 2022年第5期11卷 675-683,I0001页

作者： Kenji Karako Yuichiro Mihara Junichi arita Akihiko Ichida Sung Kwan Bae Yoshikuni Kawaguchi Takeaki Ishizawa Nobuhisa Akamatsu Junichi Kaneko Kiyoshi Hasegawa Yu Chen Department of Human and Engineered Environmental Studies Graduate School of Frontier SciencesThe University of TokyoChibaJapan Artificial Organ and Transplantation Surgery Division Department of SurgeryGraduate School of MedicineThe University of TokyoTokyoJapan

Background:Although diagnostic ultrasound can non-invasively capture the image of abdominal viscera,diagnosis of the continuous ultrasound liver images to detect a liver tumor effectively and to determine whether the detected is benign or malignant is *** order to minimize the gaps in diagnostic accuracy depending on doctor’s proficiency,we built an automated system to support the ultrasonography of liver tumors by employing deep learning ***:We constructed a neural network model for the automated detection of tumor tissues and blood vessels from the sequential liver ultrasound *** region-based convolutional neural networks(Faster R-CNN)is employed as a base model for the object detection,which can output the detection results in 4 frames per second and enable the system to be particularly suitable for the real time ***,we proposed a new neural network architecture feeding both the current and previous images into Faster *** training the models,intraoperative ultrasound images obtained from one hepatocellular carcinoma(HCC)patient were *** obtained image was a multifaceted observation of the liver and includes one HCC and some blood *** labeled 91 images with the help of a liver *** compared the tumor detection performance of the plain Faster R-CNN model with that of the proposed ***:We find that both the models performed well in detecting HCC and blood vessels,after training with 400 epochs using ***,the mean precision of our model reaches 0.549,which is 0.019 better than that of the plain Faster R-CNN,and the mean sensitivity of our model about HCC reaches 0.623±0.385 for 30 scenes of sequential liver ultrasound images,which is also 0.146 better than that of the plain Faster R-CNN ***:The comparison between the proposed model and the plain Faster R-CNN model shows that we achieved better accuracy in tumor detection,in terms of the mean precision a

关键词： Liver deep learning ultrasonography object detection hepatocellular carcinoma(HCC)

Liquid biopsy in patients with pancreatic cancer: Circulating tumor cells and cell-free nucleic acids

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World Journal of Gastroenterology 2016年第25期22卷 5627-5641页

作者： Taisuke Imamura Shuhei Komatsu Daisuke Ichikawa Tsutomu Kawaguchi Mahito Miyamae Wataru Okajima Takuma Ohashi Tomohiro arita Hirotaka Konishi Atsushi Shiozaki Ryo Morimura Hisashi Ikoma Kazuma Okamoto Eigo Otsuji Division of Digestive Surgery Department of Surgery Kyoto Prefectural University of Medicine

Despite recent advances in surgical techniques and perioperative management, the prognosis of pancreatic cancer(PCa) remains extremely poor. To provide optimal treatment for each patient with Pca, superior biomarkers are urgently needed in all phases of management from early detection to staging, treatment monitoring, and prognosis. In the blood of patients with cancer, circulating tumor cells(CTCs) and cell-free nucleic acids(cf NAs), such as DNA, m RNA, and noncoding RNA have been recognized. In the recent years, their presence in the blood has encouraged researchers to investigate their potential use as novel blood biomarkers, and numerous studies have demonstrated their potential clinical utility as a biomarker for certain types of cancer. This concept, called "liquid biopsy" has been focused on as a less invasive, alternative approach to cancer tissue biopsy for obtaining genetic and epigenetic aberrations that contribute to oncogenesis and cancer progression. In this article, we review the available literature on CTCs and cfN As in patients with cancer, particularly focusing on PCa, and discuss future perspectives in this field.

关键词： Pancreatic cancer Biomarker Liquid biopsy Circulating tumor cells Cell-free nucleic acids

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8个没有网络信号的度假天堂,你敢去吗？

今日科苑 2016年第1期 68-69页

作者： arita

科技的发达,让我们可以一天24小时都有网路可以使用。这虽然带来便利,但也带来压力,我们花在电脑、平板、手机上的时间越来越长。2013年的一个研究显示,每人平均一天会确认手机大约150次,也就是每6分半就会查看手机。如果你也厌倦了忙... 详细信息

科技的发达,让我们可以一天24小时都有网路可以使用。这虽然带来便利,但也带来压力,我们花在电脑、平板、手机上的时间越来越长。2013年的一个研究显示,每人平均一天会确认手机大约150次,也就是每6分半就会查看手机。如果你也厌倦了忙碌又被工作压得喘不过气的生活,想要好好来一次真正的渡假,建议你可以参考以下几个没有网路讯号的旅游地点,暂时告别电邮和网路社群的疲劳轰炸。

关键词：网络信号天堂度假网路手机

Early thrombomodulin-α administration outcome for acute disseminated intravascular coagulopathy in gastrointestinal surgery

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World Journal of Gastroenterology 2017年第5期23卷 891-898页

作者： Hirotaka Konishi Kazuma Okamoto Katsutoshi Shoda Tomohiro arita Toshiyuki Kosuga Ryo Morimura Shuhei Komatsu Yasutoshi Murayama Atsushi Shiozaki Yoshiaki Kuriu Hisashi Ikoma Masayoshi Nakanishi Daisuke Ichikawa Hitoshi Fujiwara Eigo Otsuji Division of Digestive Surgery Department of SurgeryKyoto Prefectural University of MedicineKajii-choKyoto city 6028566Japan

AIMTo investigate the efficacy of thrombomodulin (TM)-α for treatment of disseminated intravascular coagulopathy (DIC) in the field of gastrointestinal ***-six peri-operative DIC patients in the field of gastrointestinal surgery who were treated with TM-α were retrospectively investigated. The relationships between patient demographics and the efficacy of TM-α were examined. Analysis of survival at 28 d was also performed on some parameters by means of the Kaplan-Meier method. Relationships between the initiation of TM-α and patient demographics were also *** formation or bacteremia was the most frequent cause of DIC (33%), followed by digestive tract perforation (31%). Twenty-six patients developed DIC after surgery, frequently within 1 wk (81%). TM-α was most often administered within 1 d of the DIC diagnosis (72%) and was continued for more than 3 d (64%). Although bleeding tendency was observed in 7 patients (19%), a hemostatic procedure was not needed. DIC scores, systemic inflammatory response syndrome (SIRS) scores, quick-sequential organ failure assessment (qSOFA) scores, platelet counts, and prothrombin time ratios significantly improved after 1 wk (P < 0.05, for all). The overall survival rate at 28 d was 71%. The duration of TM-α administration (≥ 4 , ≤ 6) and improvements in DIC-associated scores (DIC, SIRS and qSOFA) at 1 wk were significantly better prognostic factors for 28-d survival (P < 0.05, for all). TM-α was administered significantly earlier to patients with severe clinical symptoms, such as high qSOFA scores, sepsis, shock or high lactate values (P < 0.05, for all).CONCLUSIONEarly administration of TM-α and improvements in each parameter were essential for treatment of DIC. The diagnosis of patients with mild symptoms requires further study.

关键词： Quick-sequential organ failure assessment Thrombomodulin-α Gastrointestinal surgery Systemic inflammatory response syndrome Acute disseminated intravascular coagulopathy