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High-precision group-delay dispersion measurements of optical fibers via fingerprint-spectral wavelength-to-time mapping

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Photonics Research 2016年第1期4卷 13-16页

作者： Takashi Ito Ondrej Slezak Masahiro Yoshita Hidefumi Akiyama yohei kobayashi Institue for Solid State Physics University of Tokyo HiLASE Centre Institute of Physics ASCR

The group-delay dispersion of an optical fiber was measured with the time-of-flight method, using fingerprint-like characteristic spectra from a mode-locked fiber laser source. To determine the group-delay dispersion up to the fourth order, least-squares fitting was applied to the overall time waveform mapped on the time axis for the fingerprint-spectral broadband pulses through a long optical fiber. The analysis of all 4003 data points reduced statistical uncertainty, and provided second-, third-, and fourth-order dispersion with uncertainties of 0.02%, 0.4%, and 4%,respectively.

关键词： length time High-precision group-delay dispersion measurements of optical fibers via fingerprint-spectral wavelength-to-time mapping

真空紫外193nm波段固体激光器研究进展综述

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光学学报 2022年第11期42卷 152-166页

作者：赵智刚玄洪文王景冲丛振华张行愚小林洋平刘兆军山东大学信息科学与工程学院山东省激光技术与应用重点实验室山东青岛266237 山东大学激光与红外系统集成技术教育部重点实验室山东青岛266237 广东大湾区空天信息研究院广东广州510700 东京大学物性研究所日本千叶277-8581

综述了真空紫外193 nm波段固体激光光源的发展情况,具体包括所涉及到的主要非线性晶体[偏硼酸钡(BBO)晶体、三硼酸锂(LBO)晶体、六硼酸铯锂(CLBO)晶体、氟代硼铍酸钾(KBBF)晶体等]的各类特性及其对比分析、近几十年来193 nm波段连续固... 详细信息

综述了真空紫外193 nm波段固体激光光源的发展情况,具体包括所涉及到的主要非线性晶体[偏硼酸钡(BBO)晶体、三硼酸锂(LBO)晶体、六硼酸铯锂(CLBO)晶体、氟代硼铍酸钾(KBBF)晶体等]的各类特性及其对比分析、近几十年来193 nm波段连续固体激光和脉冲固体激光的发展脉络、用于产生193 nm固体激光的各种基频光源组合,并对它们的优劣势进行了分类分析和对比。对影响非线性晶体紫外透过率和紫外激光输出功率的双光子吸收效应进行了描述,并对深紫外激光器中的激光诱导污染效应进行了描述,指出几类常用的避免或者缓解该效应的方法。最后对实现超高重复频率准连续真空紫外激光的难度和应当解决的问题进行了探讨。

关键词：深紫外固体激光真空紫外非线性晶体双光子吸收激光诱导污染

Fundamental Study on Response Properties of Structures Constructed on Lunar Regolith

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Open Journal of Earthquake Research 2024年第1期13卷 27-40页

作者： Yuji Miyamoto Takaharu Nakano Toshio kobayashi Department of Architecture and Civil Engineering Fukui University of Technology Fukui Japan Graduate School of Engineering Osaka University Osaka Japan SANSEI Inc. Tokyo Japan

The Artemis Program, for constructing the lunar base, is in progress. How to design and construct architectural and civil engineering structures in the lunar environment has become an important issue. The lunar surface is covered with soft sand, called regolith, and it is required to protect lunar bases and structures, as well as internal precision equipment, against vibrational disturbances such as moonquakes and meteorite collisions. Therefore, in this study, the static and cyclic triaxial compression tests of the regolith simulant were conducted. The reference strain and equivalent damping factor of the regolith simulant were smaller compared to sandy soil on Earth. In addition, a shaking table test using model specimens was conducted on the response properties of regolith ground alone and structures set on regolith ground. The buried foundation and pile foundation notably suppressed the horizontal response attributed to the rocking component compared to a direct foundation.

关键词： Lunar Development Regolith Soil-Structure Interaction Triaxial Compression Test Shaking Table Test

TiO₂-PES Fibrous Composite Material for Ammonia Removal Using UV-A Photocatalyst

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Journal of Materials Science and Chemical Engineering 2024年第1期12卷 1-19页

作者： Anh Phuong Le Thi Masaru Ohshiro Takaomi kobayashi Department of Science and Technology Innovation Nagaoka University of Technology Nagaoka Japan Kasai Corporation Niigata Japan

This study focused on the development and characterization of TiO2-PES composite fibers with varying TiO2 loading amounts using a phase inversion process. The resulting composite fibers exhibited a sponge-like structure with embedded TiO2 nanoparticles within a polymer matrix. Their photocatalytic performance for ammonia removal from aqueous solutions under UV-A light exposure was thoroughly investigated. The findings revealed that PeTi8 composite fibers displayed superior adsorption capacity compared to other samples. Moreover, the study explored the impact of pH, light intensity, and catalyst dosage on the photocatalytic degradation of ammonia. Adsorption equilibrium isotherms closely followed the Langmuir model, with the results indicating a correlation between qm values of 2.49 mg/g and the porous structure of the adsorbents. The research underscored the efficacy of TiO2 composite fibers in the photocatalytic removal of aqueous under UV-A light. Notably, increasing the distance between the photocatalyst and the light source resulted in de-creased hydroxyl radical concentration, influencing photocatalytic efficiency. These findings contribute to our understanding of TiO2 composite fibers as promising photocatalysts for ammonia removal in water treatment applications.

关键词： Ammonia Removal Photocatalyst TiO2-PES Composite Fiber Fibrous Material

Unroofing Technique for Anomalous Origin of the Left Coronary Artery from the Right Sinus of Valsalva: Report of a Case

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World Journal of Cardiovascular Surgery 2024年第6期14卷 69-77页

作者： Keisuke Morimoto Futoshi kobayashi Hiromu Horie Yuki Sakaguchi Einosuke Mizuta Department of Cardiovascular Surgery Sanin Rosai Hospital Yonago Japan Department ofCardiology Sanin Rosai Hospital Yonago Japan

Anomalous origin of the left coronary artery (AOLCA) from the right sinus of Valsalva constitutes a rare congenital coronary artery anomaly. Patients with an anomalous left main coronary artery face a significantly higher risk of sudden cardiac death compared to those with an anomalous right coronary artery. The anomalous coronary artery traversing between the ascending aorta and the pulmonary artery markedly heightens the risk of myocardial ischemia, arrhythmia, and sudden death. Symptomatic patients often exhibit a longer intramural course of the coronary artery, which may necessitate earlier intervention or influence the choice of surgical repair method. Surgical intervention is advocated for patients with this anomaly, even in the absence of symptoms. For anomalous aortic origin of a coronary artery from the opposite sinus of Valsalva with an intramural course, coronary unroofing is the preferred revascularization procedure. This report presents a case of AOLCA originating from the right sinus of Valsalva, treated surgically using the unroofing technique for the aortic intramural segment of the anomalous coronary artery traversing between the great vessels. The unroofing technique is recommended for treating AOLCA with an extensive intramural course that does not involve the commissure.

关键词： Unroofing Technique Anomaly of Coronary Artery Anomalous Origin of Left Coronary Artery

在中国简牍研究中应用日本木简研究成果的可能性——以马场基《日本古代木简论》为切入点

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敦煌学辑刊 2024年第1期1卷 25-38页

作者：小林文治南开大学历史学院天津300350

近年来,简牍研究的理论内容高速发展,并集中于“简牍学”的形成。在这样的大背景下,中国的简牍研究者开始着眼于国外的简牍研究成果也实属必然。日本木简的研究成果总量十分庞大,并且研究分类十分细致。马场基所著的《日本古代木简论》... 详细信息

近年来,简牍研究的理论内容高速发展,并集中于“简牍学”的形成。在这样的大背景下,中国的简牍研究者开始着眼于国外的简牍研究成果也实属必然。日本木简的研究成果总量十分庞大,并且研究分类十分细致。马场基所著的《日本古代木简论》着重展现、推进了东亚研究视野下的木简研究,充分体现了现阶段日本木简研究最前沿的成果。本文认为,马场氏的研究方式或许蕴含着能给中国的简牍研究带来全新的视角和研究方式的可能性。本文通过马场氏著作的相关讨论,对如何将日本木简研究中的方法应用至中国简牍研究进行探讨。

关键词：日本木简中国简牍简牍学

Static Stretching Combined with Conscious Slower Breathing May Increase Parasympathetic Activity and Reduce Stress in Adult Women

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Health 2024年第3期16卷 242-256页

作者： Mami Sakurai Yasushi Ikarashi Masahiro Tabuchi Ailing Hu Takuji Yamaguchi Hiroyuki kobayashi Department of Hospital Administration Juntendo University Graduate School of Medicine Tokyo Japan Department of Beauty & Wellness Professional University of Beauty & Wellness Yokohama Japan Department of Personalized Kampo Medicine Juntendo University Graduate School of Medicine Tokyo Japan

Background: Women are thought to be more susceptible to stress than men in a stressful society, and reducing stress is crucial for women to maintain their health. Static stretching (SST) is applied in various fields to not only increase muscle flexibility but also reduce stress. Additionally, conscious slower breathing (CSB) predominates parasympathetic activity, causing a relaxing effect. These results indicate that combining SST and CSB may be more useful in reducing stress. However, to the best of our knowledge, the effect of this combination remains unclear. Objective: This study aimed to elucidate the effects of the combination of SST and CSB on autonomic activity and stress in adult women. Methods: Eleven healthy Japanese adult female participants performed SST with nonconscious natural breathing for 20 min. The same participants performed SST in combination with CSB (2 s inspiratory and 4 s expiratory) for 20 min on another day. Salivary cortisol and chromogranin A levels were measured before and after stretching as stress markers of the hypothalamic-pituitary-adrenal axis and sympathetic nervous system. The coefficient of variation of the R-R interval (CVR-R) and high-frequency component (HF), which reflect parasympathetic nerve activity, and heart rate and low-frequency component (LF)/HF ratio, which reflect sympathetic nerve activity, were measured before, during, and after stretching. Results: SST decreased cortisol levels but with no significant changes in chromogranin A, heart rate, CVR-R, HF, or LF/HF ratio. The combination of SST and CSB increased CVR-R and HF levels in addition to decreasing cortisol levels but with no significant changes in chromogranin A, heart rate, or LF/HF levels. Conclusion: These results indicate that the combination of SST and CSB may increase parasympathetic activity and reduce stress. However, future randomized controlled trials with larger sample sizes should support this conclusion.

关键词： Static Stretching Conscious Slower Breathing Autonomic Activity Heart Rate Variability Stress

Optimized operation scheme of flash-memory-based neural network online training with ultra-high endurance

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Journal of Semiconductors 2024年第1期45卷 33-37页

作者： Yang Feng Zhaohui Sun Yueran Qi Xuepeng Zhan Junyu Zhang Jing Liu Masaharu kobayashi Jixuan Wu Jiezhi Chen School of Information Science and Engineering(ISE) Shandong UniversityQingdao 266200China Neumem Co. LtdHefei 230093China Key Laboratory of Microelectronic Devices and Integrated Technology Institute of Microelectronics of Chinese Academy of SciencesBeijing 100084China Institute of Industrial Science The University of TokyoTokyoJapan

With the rapid development of machine learning,the demand for high-efficient computing becomes more and more urgent.To break the bottleneck of the traditional Von Neumann architecture,computing-in-memory(CIM)has attracted increasing attention in recent years.In this work,to provide a feasible CIM solution for the large-scale neural networks(NN)requiring continuous weight updating in online training,a flash-based computing-in-memory with high endurance(10^(9) cycles)and ultrafast programming speed is investigated.On the one hand,the proposed programming scheme of channel hot electron injection(CHEI)and hot hole injection(HHI)demonstrate high linearity,symmetric potentiation,and a depression process,which help to improve the training speed and accuracy.On the other hand,the low-damage programming scheme and memory window(MW)optimizations can suppress cell degradation effectively with improved computing accuracy.Even after 109 cycles,the leakage current(I_(off))of cells remains sub-10pA,ensuring the large-scale computing ability of memory.Further characterizations are done on read disturb to demonstrate its robust reliabilities.By processing CIFAR-10 tasks,it is evident that~90%accuracy can be achieved after 109 cycles in both ResNet50 and VGG16 NN.Our results suggest that flash-based CIM has great potential to overcome the limitations of traditional Von Neumann architectures and enable high-performance NN online training,which pave the way for further development of artificial intelligence(AI)accelerators.

关键词： NOR flash memory computing-in-memory endurance neural network online training

Identification of telomere maintenance gene variations related to lung adenocarcinoma risk by genome-wide association and whole genome sequencing analyses

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Cancer Communications 2024年第2期44卷 287-293页

作者： Kouya Shiraishi Atsushi Takahashi Yukihide Momozawa Yataro Daigo Syuzo Kaneko Takahisa Kawaguchi Hideo Kunitoh Shingo Matsumoto Hidehito Horinouchi Akiteru Goto Takayuki Honda Kimihiro Shimizu Masahiro Torasawa Daisuke Takayanagi Motonobu Saito Akira Saito Yuichiro Ohe Shun-ichi Watanabe Koichi Goto Masahiro Tsuboi Katsuya Tsuchihara Sadaaki Takata Tomomi Aoi Atsushi Takano Masashi kobayashi yohei Miyagi Kazumi Tanaka Hiroyuki Suzuki Daichi Maeda Takumi Yamaura Maiko Matsuda Yoko Shimada Takaaki Mizuno Hiromi Sakamoto Teruhiko Yoshida Yasushi Goto Tatsuya Yoshida Taiki Yamaji Makoto Sonobe Shinichi Toyooka Kazue Yoneda Katsuhiro Masago Fumihiro Tanaka Megumi Hara Nobuo Fuse Satoshi S.Nishizuka Noriko Motoi Norie Sawada Yuichiro Nishida Kazuki Kumada Kenji Takeuchi Kozo Tanno Yasushi Yatabe Kuniko Sunami Tomoyuki Hishida Yasunari Miyazaki Hidemi Ito Mitsuhiro Amemiya Hirohiko Totsuka Haruhiko Nakayama Tomoyuki Yokose Kazuyoshi Ishigaki Toshiteru Nagashima Yoichi Ohtaki Kazuhiro Imai Ken Takasawa Yoshihiro Minamiya Kazuma kobayashi Kenichi Okubo Kenji Wakai Atsushi Shimizu Masayuki Yamamoto Motoki Iwasaki Koichi Matsuda Johji Inazawa Yuichi Shiraishi Hiroyoshi Nishikawa Yoshinori Murakami Michiaki Kubo Fumihiko Matsuda Yoichiro Kamatani Ryuji Hamamoto Keitaro Matsuo Takashi Kohno Division of Genome Biology National Cancer Center Research InstituteTokyoJapan Department of Clinical Genomics National Cancer Center Research InstituteTokyoJapan Laboratory for Statistical Analysis Center for Integrative Medical SciencesRIKENYokohamaJapan Department of Genomic Medicine Research InstituteNational Cerebral and Cardiovascular CenterOsakaJapan Laboratory for Genotyping Development Center for Integrative Medical SciencesRIKENYokohamaJapan Center for Antibody and Vaccine Therapy Research HospitalInstitute of Medical ScienceThe University of TokyoTokyoJapan Department of Medical Oncology and Cancer Center and Center for Advanced Medicine against CancerShiga University of Medical ScienceOtsuJapan Division of Medical AI Research and Development National Cancer Center Research InstituteTokyoJapan Center for Genomic Medicine Graduate School of MedicineKyoto UniversityKyotoJapan Department of Medical Oncology Japanese Red Cross Medical CenterTokyoJapan Department of Thoracic Oncology National Cancer Center Hospital EastJapan Department of Thoracic Oncology National Cancer Center HospitalTokyoJapan Department of Cellular and Organ Pathology Graduate School of MedicineAkita UniversityAkitaJapan Department of Respiratory Medicine Tokyo Medical and Dental UniversityBunkyo-kuTokyoJapan Division of General Thoracic Surgery Department of SurgeryShinshu University School of MedicineMatsumotoNaganoJapan Department of General Surgical Science Division of General Thoracic SurgeryGunma University Graduate School of MedicineIntegrative Center of General SurgeryGunma University HospitalGunmaJapan Department of Gastrointestinal Tract Surgery Fukushima Medical University School of MedicineFukushimaJapan StaGen Co. LtdTokyoJapan Division of Thoracic Surgery National Cancer Center HospitalTokyoJapan Department of Thoracic Surgery National Cancer Center Hospital EastChibaJapan Division of Translational Informatics Exploratory Oncology Research and Clinical Trial Center(EPOC

Dear editor,Lung carcinoma is responsible for the highest fatal-ity rate among cancer-related deaths globally,with lung adenocarcinoma(LADC)emerging as the prevailing sub-type.

关键词： adenocarcinoma lung Lung