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Funabot-Suit:A bio-inspired and McKibben muscle-actuated suit for natural kinesthetic perception

Biomimetic Intelligence & Robotics 2023年第4期3卷 29-39页

作者： Yanhong Peng Yusuke Sakai Koki Nakagawa Yuki Funabora Tadayoshi Aoyama kenta yokoe Shinji Doki Department of Information and Communication Engineering Graduate School of EngineeringNagoya UniversityNagoya 4648601Japan Department of Micro-Nano Mechanical Science and Engineering Graduate School of EngineeringNagoya UniversityNagoya 4648601Japan

In recent years,there has been extensive utilization of actuators driven by artificial muscles in wearable ***,the muscle distribution configurations of most wearable devices have been specifically designed and are difficult to ***,wearable devices that allow direct installation of actuators onto existing clothing are better suited for a wider range of application *** letter presents the development and evaluation of Funabot-Suit,a human muscle configuration inspired wearable assist device that employs McKibben artificial muscles to induce natural kinesthetic perception in the wearer’s *** integrating thin McKibben muscles into an existing motion capture suit,the Funabot-Suit is capable of generating four fundamental motions:forward and backward bending,and left and right *** suit’s performance was assessed through experiments involving three subjects who wore the suit while standing and seated,with the subjects reporting the direction of their kinesthetic *** subjects also rated the perceived ease of kinesthetic perception direction on a five-point *** results demonstrate that the Funabot-Suit successfully induces kinesthetic perceptions for the wearer,with a one hundred percent detection ratio for accurate responses in the command direction across all subjects and *** observed variations in the sensitivity of left–right and up-down sensations,which can be attributed to the positioning of artificial muscles and individual differences.

关键词： Bio-inspired robotics Actuators Soft robotics Artificial muscles Haptic interfaces Kinesthetic perception

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Regularizing fuel-optimal multi-impulse trajectories

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Astrodynamics 2024年第1期8卷 97-119页

作者： kenta Oshima Department of Mechanical Systems Engineering Hiroshima Institute of TechnologyHiroshima731-5193Japan

The regularization theory has successfully enabled the removal of gravitational singularities associated with celestial *** this study,regularizing techniques are merged into a multi-impulse trajectory design framework that requires delicate computations,particularly for a fuel minimization *** variables based on the Levi–Civita or Kustaanheimo–Stiefel transformations express instantaneous velocity changes in a gradient-based direct optimization *** formulation removes the adverse singularities associated with the null thrust impulses from the derivatives of an objective function in the fuel minimization *** favorite singularity-free property enables the accurate reduction of unnecessary impulses and the generation of necessary impulses for local optimal solutions in an automatic *** of fuel-optimal multi-impulse trajectories are presented,including novel transfer solutions between a near-rectilinear halo orbit and a distant retrograde orbit.

关键词： regularization trajectory optimization fuel minimization multi-impulse trajectory

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How are multiple satellites seen from the ground? Relative apparent motion and formation stabilization

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Astrodynamics 2024年第1期8卷 121-134页

作者： kenta Nakajima Yasuhiro Yoshimura Hongru Chen Toshiya Hanada Department of Aeronautics and Astronautics Kyushu University744 Motooka Nishi-kuFukuoka819-0395Japan

This paper answers how multiple satellites are seen from the ground. This question is inspired by space-advertising, a public exhibition in the night sky using a dot matrix of satellites that are bright enough to be seen by the naked eye. Thus, it is important for space advertisement that the specific dot matrix is seen. Moreover, the stability of the dot matrix during a visible span is very valuable. To stabilize the dot matrix, this study formulates an apparent position of a dot from a representative dot seen from the ground. The formulation, linear functions of a set of relative orbital elements, reveals the appearance of the dot matrix. The proposed relative variable in the formulation drives the instability of the dot matrix, thereby revealing an initial stable configuration of deputies from a chief. The arbitrary dot matrix designed using the configuration is stable even at low elevations without orbital control during the visible span.

关键词： formation flying relative motion stabilization astrodynamics multi-apparent motions space advertisement

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The neutrophil–osteogenic cell axis promotes bone destruction in periodontitis

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International Journal of Oral Science 2024年第1期16卷 154-162页

作者： Yutaro Ando Masayuki Tsukasaki Nam Cong-Nhat Huynh Shizao Zang Minglu Yan Ryunosuke Muro Kazutaka Nakamura Masatsugu Komagamine Noriko Komatsu Kazuo Okamoto kenta Nakano Tadashi Okamura Akira Yamaguchi Kazuyuki Ishihara Hiroshi Takayanagi Department of Immunology Graduate School of Medicine and Faculty of MedicineThe University of Tokyo7-3-1HongoBunkyo-kuTokyoJapan Department of Microbiology Tokyo Dental College2-1-14 Kanda-Misaki-choChiyoda-kuTokyoJapan Oral Health Science Center Tokyo Dental College2-9-18Kanda-Misaki-choChiyodakuTokyoJapan Department of Osteoimmunology Graduate School of Medicine and Faculty of MedicineThe University of Tokyo7-3-1HongoBunkyo-kuTokyoJapan Unit of Prosthodontics Laboratory of Oral-Maxillofacial Biology Faculty of Odonto-StomatologyUniversity of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh CityVietnam Department of Oral and Maxillofacial Surgery Department of Sensory and Motor System MedicineGraduate School of MedicineThe University of TokyoTokyoJapan Division of Rheumatology Department of Internal MedicineKeio University School of MedicineTokyoJapan Department of Laboratory Animal Medicine Research InstituteNational Center for Global Health and MedicineTokyoJapan

The immune-stromal cell interactions play a key role in health and diseases. In periodontitis, the most prevalent infectious disease in humans, immune cells accumulate in the oral mucosa and promote bone destruction by inducing receptor activator of nuclear factor-κB ligand (RANKL) expression in osteogenic cells such as osteoblasts and periodontal ligament cells. However, the detailed mechanism underlying immune–bone cell interactions in periodontitis is not fully understood. Here, we performed single-cell RNAsequencing analysis on mouse periodontal lesions and showed that neutrophil–osteogenic cell crosstalk is involved in periodontitis-induced bone loss. The periodontal lesions displayed marked infiltration of neutrophils, and in silico analyses suggested that the neutrophils interacted with osteogenic cells through cytokine production. Among the cytokines expressed in the periodontal neutrophils, oncostatin M (OSM) potently induced RANKL expression in the primary osteoblasts, and deletion of the OSM receptor in osteogenic cells significantly ameliorated periodontitis-induced bone loss. Epigenomic data analyses identified the OSM-regulated RANKL enhancer region in osteogenic cells, and mice lacking this enhancer showed decreased periodontal bone loss while maintaining physiological bone metabolism. These findings shed light on the role of neutrophils in bone regulation during bacterial infection, highlighting the novel mechanism underlying osteoimmune crosstalk.

关键词： period neutrophil destruction

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SHEA/IDSA/APIC实践建议:预防医院感染策略纲要(2022年更新版)

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中国感染控制杂志 2024年第5期23卷 652-660页

作者：肖园园谭彩霞(译) 吴安华(审校) yokoe DA Advani SD Anderson DJ 中南大学湘雅医院医院感染控制中心湖南长沙410008 不详

美国医疗保健流行病学学会/美国感染病协会/感染控制和流行病学专业人员协会(SHEA/IDSA/APIC)2022年更新了“急诊医院医疗保健相关感染的预防策略纲要”,内容包括“导尿管相关尿路感染(CAUTI)的预防策略”“中央导管相关血流感染(CLABSI... 详细信息

美国医疗保健流行病学学会/美国感染病协会/感染控制和流行病学专业人员协会(SHEA/IDSA/APIC)2022年更新了“急诊医院医疗保健相关感染的预防策略纲要”,内容包括“导尿管相关尿路感染(CAUTI)的预防策略”“中央导管相关血流感染(CLABSI)的预防策略”“艰难梭菌感染(CDI)的预防策略”“预防耐甲氧西林金黄色葡萄球菌(MRSA)传播和感染的策略”“手术部位感染(SSI)的预防策略”“呼吸机相关肺炎(VAP)和呼吸机相关事件(VAE)的预防策略”“预防非呼吸机医院获得性肺炎(NV-HAP)的策略”“通过手卫生预防医疗保健相关感染的策略”“实施预防医疗保健相关感染的策略”九部分。

关键词：医院感染导尿管相关尿路感染中央导管相关血流感染艰难梭菌感染耐甲氧西林金黄色葡萄球菌手术部位感染呼吸机相关肺炎呼吸机相关事件非呼吸机医院获得性肺炎手卫生医疗保健相关感染预防策略

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Emotion Measurement Using Biometric Signal

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Health 2024年第5期16卷 395-404页

作者： Yukina Miyagi Saori Gocho Yuka Miyachi Chika Nakayama Shoshiro Okada kenta Maruyama Taeyuki Oshima College of Pharmacy Kinjo Gakuin University Nagoya Japan Graduate School of Medicine Aichi Medical University Nagakute Japan Department of Pharmacy Nagoya Ekisaikai Hospital Nagoya Japan Department of Pharmacy Gifu University of Medical Science Kani Japan

In recent years, research on the estimation of human emotions has been active, and its application is expected in various fields. Biological reactions, such as electroencephalography (EEG) and root mean square successive difference (RMSSD), are indicators that are less influenced by individual arbitrariness. The present study used EEG and RMSSD signals to assess the emotions aroused by emotion-stimulating images in order to investigate whether various emotions are associated with characteristic biometric signal fluctuations. The participants underwent EEG and RMSSD while viewing emotionally stimulating images and answering the questionnaires. The emotions aroused by emotionally stimulating images were assessed by measuring the EEG signals and RMSSD values to determine whether different emotions are associated with characteristic biometric signal variations. Real-time emotion analysis software was used to identify the evoked emotions by describing them in the Circumplex Model of Affect based on the EEG signals and RMSSD values. Emotions other than happiness did not follow the Circumplex Model of Affect in this study. However, ventral attentional activity may have increased the RMSSD value for disgust as the β/θ value increased in right-sided brain waves. Therefore, the right-sided brain wave results are necessary when measuring disgust. Happiness can be assessed easily using the Circumplex Model of Affect for positive scene analysis. Improving the current analysis methods may facilitate the investigation of face-to-face communication in the future using biometric signals.

关键词： Biometric Signals Electroencephalogram Electrocardiogram Emotion Communication

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Novel synthesis of single-crystalline TbCu_(7)-type Sm-Fe powder by low-temperature reduction-diffusion process using molten salt

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Journal of Rare Earths 2022年第7期40卷 1126-1133页

作者： Shusuke Okada kenta Takagi Magnetic Powder Metallurgy Research Center National Institute of Advanced Industrial Science and Technology(AIST)2266-98 AnagahoraShimoshidami MoriyamaNagoya463-8560Japan

In this study,molten salt was used as a solvent for calcium(Ca)to let a reduction-diffusion(R-D)reaction occur below the melting point of Ca(1115 K),which is the lower limit temperature of the co nventional RD *** the R-D reaction is conducted below 923 K with LiCl molten salt,submicron-sized TbCu_(7)-type Sm-Fe powder is *** c/a ratio of the powder estimated by a synchrotron X-ray diffraction pattern is 0.8456,which is consistent with the Sm_(0.67)Fe_(5.667)(SmFe_(8.5))*** electron backscatter diffraction analysis reveals that single-crystalline TbCu_(7)-type SmFe_(8.5) powder was synthesized for the first time.

关键词： Reduction-diffusion TbCu_(7) Molten salt Permanent magnet Rare earths

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Low-temperature synthesis of Sm-Fe binary compounds by reduction-diffusion process using an eutectic salt solvent

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Rare Metals 2023年第5期42卷 1724-1731页

作者： Jungryang Kim Shusuke Okada kenta Takagi Magnetic Powder Metallurgy Research Center National Institute of Advanced Industrial Science and Technology(AIST)NagoyaAichi463-8560Japan

In this study,the temperature of the low-temperature reduction-diffusion(LTRD)process was successfully decreased to below 600℃by introducing LiClKCl eutectic molten salt with a low eutectic point(352℃)as a solvent for Ca ***,the Sm-Fe binary compounds,which were synthesizable at previously-unexplored low temperatures by the LTRD process using LiCl-KCl eutectic molten salt,were investigated,including whether a new metastable or ThMn_(12)-type Sm-Fe binary phase was *** Sm-Fe phase transitions of the SmFe binary compounds at a low temperature were identified,and it was found that MgCu_(2)-type Sm-Fe,PuNi_(3)-type SmFe and TbCu_(7)-type Sm-Fe phases were synthesized and stable at 400,500 and 550℃*** no new metastable Sm-Fe and ThMn_(12)-type Sm-Fe compounds were discovered in this study,this work can demonstrate that it is possible to synthesize the Sm-Fe phase at very low temperatures by the LTRD process for the first time.

关键词： Low-temperature synthesis Reductiondiffusion process Molten salts Hard magnet Sm-Fe compounds

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Goblet cell carcinoid of the appendix:Six case reports

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World Journal of Clinical Cases 2024年第22期12卷 5217-5224页

作者： Toshiaki Toshima Ryo Inada Shinya Sakamoto Eri Takeda Takahiro Yoshioka Kento Kumon Naoki Mimura Nobuo Takata Motoyasu Tabuchi Kazuyuki Oishi Takuji Sato kenta Sui Takehiro Okabayashi Kazuhide Ozaki Toshio Nakamura Yuichi Shibuya Manabu Matsumoto Jun Iwata Department of Gastroenterological Surgery Kochi Health Sciences CenterKochi 781-8555Japan Department of Diagnostic Pathology Kochi Health Sciences CenterKochi 781-8555Japan

BACKGROUND Goblet cell carcinoid(GCC)of the appendix is a rare tumor characterized by neuroendocrine and adenocarcinoma *** preoperative diagnosis is very difficult,with most patients complaining mainly of abdominal *** tomography shows swelling of the appendix,so diagnosis is usually made incidentally after appendectomy based on a preoperative diagnosis of *** if a patient undergoes preoperative colonoscopy,accurate endoscopic diagnosis is very difficult because GCC shows a submucosal growth pattern with invasion of the appendiceal *** SUMMARY Between 2017 and 2022,6 patients with GCC were treated in our *** presenting complaint for 5 of these 6 patients was abdominal *** 5 patients underwent appendectomy,including 4 for a preoperative diagnosis of appendicitis and the other for diagnosis and treatment of an appendiceal *** sixth patient presented with vomiting and underwent ileocecal resection for GCC diagnosed from preoperative *** 2 patients with GCC underwent colonoscopy,no neoplastic changes were *** of the six patients showed lymph node metastasis on pathological *** of the last followup(median:15 mo),all cases remained alive without *** As preoperative diagnosis of GCC is difficult,this possibility must be considered during surgical treatments for presumptive appendicitis.

关键词： Goblet cell carcinoid Appendix Preoperative diagnosis Endoscopic diagnosis Surgical treatment Case report

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Local oxynitriding of AZ31 magnesium alloy by atmospheric-pressure plasma treatment at room temperature

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Journal of Magnesium and Alloys 2022年第7期10卷 1878-1886页

作者： kenta Nakazawa Tatsuki Ohashi Shotaro Saiki Shoichi Kikuchi Department of Mechanical Engineering Faculty of EngineeringShizuoka University3-5-1JohokuNaka-kuHamamatsu432-8561Japan Graduate School of Integrated Science and Technology Shizuoka University3-5-1 JohokuNaka-kuHamamatsu432-8561Japan

A surface-hardening treatment for AZ31 magnesium alloy using an atmospheric-pressure plasma jet(APPJ)at room temperature was *** is a potential engineering material because it is lightweight;however,magnesium alloys are difficult to heat-treat because of their low flaming *** alloy specimens were irradiated with a localized atmospheric-pressure plasma jet generated by dielectric-barrier discharge for 180 s in *** APPJ excited oxygen and nitrogen molecules in the ambient air,resulting in the formation of an oxynitrided layer;oxygen and nitrogen diffusion layer,on the surface of the magnesium *** hardness and elemental distribution for the treated surface were *** top surface of the APPJ-treated magnesium alloy achieved a maximum hardness of 108 HV,which was~1.7 times greater than that of the untreated *** analysis using an electron-probe microanalyzer revealed strong oxygen and nitrogen signals corresponding to the hardened region of the magnesium alloy,meaning that the hardness increased as a result of the formation of the oxynitrided *** proposed APPJ treatment is a promising approach for locally hardening magnesium alloys without using a heat treatment.

关键词： Magnesium alloy Oxynitriding Atmospheric-pressure plasma jet Hardness Surface modification Diffusion

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