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  1. AU="Sato, Hisashi"
  2. AU="O'Rourke, Dennis H"
  3. AU="Ozuna, César"
  4. AU="Vázquez-Carrera, Manuel"
  5. AU="Tanner, Rikki M"
  6. AU="Daniel H Miller"
  7. AU="Madec, Jean-Yves"
  8. AU=Rahimi Mitra

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  1. Artikel ; Online: Reconstructing spatiotemporal dynamics of mixed conifer and broad‐leaved forests with a spatially explicit individual‐based dynamic vegetation model

    Satō, Hisashi / Shibuya, Masato / Hiura, Tsutom

    Ecological Research. 2023 May, v. 38, no. 3 p.465-478

    2023  

    Abstract: A dynamic vegetation model was adapted to a mixed forest of deciduous broad‐leaved trees and evergreen conifers in Hokkaido, the northernmost main island of Japan, located within a transition zone between cool‐temperate and sub‐boreal forest ecosystems. ... ...

    Abstract A dynamic vegetation model was adapted to a mixed forest of deciduous broad‐leaved trees and evergreen conifers in Hokkaido, the northernmost main island of Japan, located within a transition zone between cool‐temperate and sub‐boreal forest ecosystems. In this forest, elevation and a terrestrial‐wetness index affect tree biomass and the percentage of conifers. We maximized agreement between this observed pattern and model output by calibrating parameters that control drought and excessive soil‐moisture tolerance, establishment rate, and background mortality rate. In the simulation, biomass increased as a single peak curve with simulation year, while the percentage of conifers increased until the end of 200 simulation years. The 75‐year simulated forest was most comparable to the adapted forest, consistent with the average frequency of catastrophic storm disturbances in Hokkaido. The model also reconstructed a reasonable succession pattern based on temperature and soil moisture. Therefore, the model mechanistically reconstructed the mixed forest via spatial niche segregation and succession after catastrophic disturbances. However, the model did not reconstruct the percentages of broad‐leaved trees and conifers of forests prior to the disturbance in independent validation plots, demonstrating that additional processes should be considered in future models.
    Schlagwörter Japan ; biomass ; conifers ; drought ; ecological differentiation ; mixed forests ; models ; mortality ; research ; soil water ; storms ; temperature ; trees
    Sprache Englisch
    Erscheinungsverlauf 2023-05
    Umfang p. 465-478.
    Erscheinungsort John Wiley & Sons, Inc.
    Dokumenttyp Artikel ; Online
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 233459-8
    ISSN 1440-1703 ; 0912-3814
    ISSN (online) 1440-1703
    ISSN 0912-3814
    DOI 10.1111/1440-1703.12385
    Datenquelle NAL Katalog (AGRICOLA)

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  2. Artikel: Structural modification of WC-Co cutting tools by laser doping treatment.

    Tanaka, Yayoi / Sato, Hisashi / Eryu, Osamu

    Heliyon

    2023  Band 9, Heft 9, Seite(n) e19930

    Abstract: We have previously shown that sharpening the cutting edge of a cemented carbide tool by chemical-mechanical polishing (CMP) improved the cutting speed by approximately 150% and reduced the wear on the flank surface by approximately 50% compared to a ... ...

    Abstract We have previously shown that sharpening the cutting edge of a cemented carbide tool by chemical-mechanical polishing (CMP) improved the cutting speed by approximately 150% and reduced the wear on the flank surface by approximately 50% compared to a commercial tool when cutting a heat-resistant alloy. In addition, the cutting edges of carbide tools treated by laser doping (LD) using boron nitride as doping material achieved approximately 100 times longer cutting distance in glass machining than the edges of carbide tools treated with CMP grinding wheels. In this study, LD was conducted on a tool base material (WC-Co) to investigate and understand the crystal structure changes of the base material upon treatment. Electron backscatter diffraction and X-ray diffraction results show that the effect of LD was observed in the region 50 nm below the surface. LD improved the strength by approximately 11.7% without destroying the surface crystal structure. Thus, doping can be performed on tool tips while maintaining the WC structure to improve the performance of WC-Co cutting tools.
    Sprache Englisch
    Erscheinungsdatum 2023-09-10
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2023.e19930
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: [Rupture of Left Ventricular Pseudo-false Aneurysm after Myocardial Infarction].

    Kuwano, Akito / Yoshikai, Masaru / Sato, Hisashi / Hayashi, Nagi

    Kyobu geka. The Japanese journal of thoracic surgery

    2023  Band 76, Heft 2, Seite(n) 106–110

    Abstract: We herein present a case of ruptured left ventriclular pseudo-false aneurysm. A 73-year-old female had acute myocardial infarction due to occlusion of the left circumflex artery, and subsequently underwent percutaneous coronary intervention. Three weeks ... ...

    Abstract We herein present a case of ruptured left ventriclular pseudo-false aneurysm. A 73-year-old female had acute myocardial infarction due to occlusion of the left circumflex artery, and subsequently underwent percutaneous coronary intervention. Three weeks later, however, the patient suddenly fell into a state of shock. Contrast-enhanced computed tomography (CT) revealed rupture of left ventricular aneurysm, and emergency surgery was performed. A ruptured aneurysm was observed in the posterior wall, and as the wall of the aneurysm was fragile, it was repaired using double-patch technique. Histopathological examination revealed myocardial cells in the aneurysm wall, confirming diagnosis of pseudo-false aneurysm. Pseudo-false aneurysm is a rare type of left ventricular aneurysm. In cases of rupture in acute or subacute phase of myocardial infarction, when the aneurysm wall is fragile, double-patch repair technique effectively ensures hemostasis and prevents future aneurysm formation.
    Mesh-Begriff(e) Female ; Humans ; Aged ; Aneurysm, False/diagnostic imaging ; Aneurysm, False/etiology ; Aneurysm, False/surgery ; Heart Ventricles/diagnostic imaging ; Heart Ventricles/surgery ; Myocardial Infarction/complications ; Myocardial Infarction/diagnostic imaging ; Myocardial Infarction/surgery ; Heart Aneurysm/diagnostic imaging ; Heart Aneurysm/etiology ; Heart Aneurysm/surgery ; Aneurysm, Ruptured/complications ; Aneurysm, Ruptured/diagnostic imaging ; Aneurysm, Ruptured/surgery
    Sprache Japanisch
    Erscheinungsdatum 2023-01-31
    Erscheinungsland Japan
    Dokumenttyp Case Reports ; English Abstract ; Journal Article
    ZDB-ID 603899-2
    ISSN 0021-5252
    ISSN 0021-5252
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel: [Anastomotic Pseudoaneurysms after Graft Replacement for IgG4-related Thoracic Aortic Aneurysm].

    Hayashi, Nagi / Yoshikai, Masaru / Sato, Hisashi / Shimauchi, Kota / Kuwano, Akito

    Kyobu geka. The Japanese journal of thoracic surgery

    2023  Band 76, Heft 5, Seite(n) 343–346

    Abstract: We report a case of pseudoaneurysms at the anastomotic sites after prosthetic graft replacement for Immunogloblin G4 (IgG4)-related thoracic aortic aneurysm. A 69-year-old male patient underwent ascending and aortic arch replacement and open stent graft ... ...

    Abstract We report a case of pseudoaneurysms at the anastomotic sites after prosthetic graft replacement for Immunogloblin G4 (IgG4)-related thoracic aortic aneurysm. A 69-year-old male patient underwent ascending and aortic arch replacement and open stent graft insertion. Five months after the surgery, pseudoaneurysms at the anastomosis to the brachiocephalic artery and to the left common carotid artery developed, and urgency surgery was performed. The right common carotid artery, the right subclavian artery, and the left common carotid artery were individually reconstructed with grafts, and the anastomoses were wrapped with grafts. In IgG4-related aneurysms, complete resection of the diseased tissue and reinforcement of the anastomosis, such as anastomotic wrapping, are important to prevent anastomotic site failure. While serum IgG4 had normalized after the first surgery, C-reactive protein (CRP) remained elevated until the reoperation. Thus, CRP is considered one of the biomarkers for disease activity in IgG4-related vascular disease.
    Mesh-Begriff(e) Male ; Humans ; Aged ; Aneurysm, False/diagnostic imaging ; Aneurysm, False/etiology ; Aneurysm, False/surgery ; Blood Vessel Prosthesis Implantation ; Treatment Outcome ; Aortic Aneurysm, Thoracic/surgery ; Aorta, Thoracic/surgery ; Anastomosis, Surgical ; Immunoglobulin G ; Stents ; Blood Vessel Prosthesis
    Chemische Substanzen Immunoglobulin G
    Sprache Japanisch
    Erscheinungsdatum 2023-05-07
    Erscheinungsland Japan
    Dokumenttyp Case Reports ; English Abstract ; Journal Article
    ZDB-ID 603899-2
    ISSN 0021-5252
    ISSN 0021-5252
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel: Comparison of Remote Sensing Methods for Plant Heights in Agricultural Fields Using Unmanned Aerial Vehicle-Based Structure From Motion.

    Fujiwara, Ryo / Kikawada, Tomohiro / Sato, Hisashi / Akiyama, Yukio

    Frontiers in plant science

    2022  Band 13, Seite(n) 886804

    Abstract: Remote sensing using unmanned aerial vehicles (UAVs) and structure from motion (SfM) is useful for the sustainable and cost-effective management of agricultural fields. Ground control points (GCPs) are typically used for the high-precision monitoring of ... ...

    Abstract Remote sensing using unmanned aerial vehicles (UAVs) and structure from motion (SfM) is useful for the sustainable and cost-effective management of agricultural fields. Ground control points (GCPs) are typically used for the high-precision monitoring of plant height (PH). Additionally, a secondary UAV flight is necessary when off-season images are processed to obtain the ground altitude (GA). In this study, four variables, namely, camera angles, real-time kinematic (RTK), GCPs, and methods for GA, were compared with the predictive performance of maize PH. Linear regression models for PH prediction were validated using training data from different targets on different flights ("different-targets-and-different-flight" cross-validation). PH prediction using UAV-SfM at a camera angle of -60° with RTK, GCPs, and GA obtained from an off-season flight scored a high coefficient of determination and a low mean absolute error (MAE) for validation data (
    Sprache Englisch
    Erscheinungsdatum 2022-06-24
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2613694-6
    ISSN 1664-462X
    ISSN 1664-462X
    DOI 10.3389/fpls.2022.886804
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel: [Total Arch Replacement due to Tracheal Compression by Brachiocephalic Artery with Bovine Aortic Arch:Report of a Case].

    Sato, Hisashi / Yoshikai, Masaru / Yoshitake, Shuichiro / Kuwano, Akito

    Kyobu geka. The Japanese journal of thoracic surgery

    2022  Band 75, Heft 2, Seite(n) 118–121

    Abstract: A 78-year-old female presented to our institution with a dry cough and dyspnea. Chest computed tomography( CT) revealed tracheal stenosis caused by compression from a brachiocephalic artery with a bovine aortic arch. Subsequently, surgery was performed ... ...

    Abstract A 78-year-old female presented to our institution with a dry cough and dyspnea. Chest computed tomography( CT) revealed tracheal stenosis caused by compression from a brachiocephalic artery with a bovine aortic arch. Subsequently, surgery was performed in which the brachiocephalic artery was resected, and a total arch replacement using a four-branched graft was completed. We paid particular attention to the graft branches, making sure to avoid contact with the trachea. Both the patient's cough and dyspnea dissipated after the surgery, and a CT revealed the tracheal stenosis had been completely relieved. The patient has remained in good condition for the past three years since the surgery showing no respiratory symptoms or thoracic aortic disease. Because the bovine aortic arch is a known risk factor for thoracic aortic disease, rather than simply reconstructing the brachiocephalic artery, we chose a more aggressive surgical treatment to prevent any possible future thoracic aortic disease.
    Mesh-Begriff(e) Aged ; Aorta, Thoracic/diagnostic imaging ; Aorta, Thoracic/surgery ; Aortic Diseases/complications ; Brachiocephalic Trunk/diagnostic imaging ; Brachiocephalic Trunk/surgery ; Female ; Humans ; Trachea/diagnostic imaging ; Trachea/surgery ; Tracheal Stenosis/diagnostic imaging ; Tracheal Stenosis/etiology ; Tracheal Stenosis/surgery
    Sprache Japanisch
    Erscheinungsdatum 2022-03-06
    Erscheinungsland Japan
    Dokumenttyp Case Reports ; Journal Article
    ZDB-ID 603899-2
    ISSN 0021-5252
    ISSN 0021-5252
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel ; Online: Papillary fibroelastoma causing severe aortic stenosis.

    Yoshikai, Masaru / Sato, Hisashi / Hayashi, Nagi / Kuwano, Akito

    Journal of cardiology cases

    2022  Band 27, Heft 3, Seite(n) 120–123

    Abstract: Herein, we present a rare case of papillary fibroelastoma of the aortic valve, which caused severe aortic stenosis. The papillary fibroelastoma developed on the left ventricular side of the non-coronary cusp, immobilizing the cusp motion and obstructing ... ...

    Abstract Herein, we present a rare case of papillary fibroelastoma of the aortic valve, which caused severe aortic stenosis. The papillary fibroelastoma developed on the left ventricular side of the non-coronary cusp, immobilizing the cusp motion and obstructing the left ventricular outflow tract, resulting in severe aortic stenosis that brought on acute heart failure. The patient underwent an urgent surgical treatment, which resulted in a successful outcome. To the best of our knowledge, this is the first case of papillary fibroelastoma in which aortic stenosis was so severe as to cause congestive heart failure.
    Learning objective: Papillary fibroelastoma (PFE) is the most commonly observed primary cardiac tumor in adults that commonly involves left heart chambers. While PFEs often cause embolisms, they rarely cause valvular dysfunction. In a case presented herein, a PFE developed on the left ventricular side of the non-coronary cusp, immobilizing the cusp motion and obstructing the left ventricular outflow tract, resulting in severe aortic stenosis that brought on acute heart failure.
    Sprache Englisch
    Erscheinungsdatum 2022-12-17
    Erscheinungsland Japan
    Dokumenttyp Case Reports
    ISSN 1878-5409
    ISSN (online) 1878-5409
    DOI 10.1016/j.jccase.2022.11.006
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel: Effects of interfacial interactions between metal and process control agents during ball milling on the microstructure of the milled Fe-based nanocrystalline alloy powder.

    Motozuka, Satoshi / Sato, Hisashi / Kuwata, Hidenori / Bito, Mitsuo / Okazaki, Yasuo

    Heliyon

    2022  Band 8, Heft 8, Seite(n) e10325

    Abstract: Fe-Si-B-P-Cu nanocrystalline alloy were treated with ball-mill using a lubricant as a process control agent (PCA). The resulting alloy powder is a strong candidate material for soft magnetic composites. Two ball milling methods (continuous and interval) ... ...

    Abstract Fe-Si-B-P-Cu nanocrystalline alloy were treated with ball-mill using a lubricant as a process control agent (PCA). The resulting alloy powder is a strong candidate material for soft magnetic composites. Two ball milling methods (continuous and interval) were employed to control the interactions between the PCA and the alloy surface, and their effect on the microstructure of the prepared alloy particles was investigated. The alloy sheet was broken into small pieces and deformed plastically into flake-shaped particles regardless of the ball milling method implemented. Friction-force microscopy of the alloy immersed in the PCA revealed that the friction coefficient of the alloy surface exposed to air for a certain period was higher than that of the unexposed alloy surface (immediately after polishing). During ball milling, the ratio of the newly generated surface to the oxidized surfaces of the alloy subjected to interval milling was smaller than that of the alloy subjected to continuous milling. Therefore, the friction coefficient of the surface of the alloy subjected to interval milling was higher than that of the alloy subjected to continuous milling. Synchrotron radiation analysis revealed that the alloy subjected to interval milling exhibited enhanced surface friction, showing an obvious steepness and inflection in the diffraction intensity as a function of the tilt angle based on the Schulz reflection method. This indicates formation of crystallographic texture in α-Fe grains in an amorphous matrix. Hence, we demonstrated successfully that the ball milling process induced a crystallographic texture in the Fe-based nanocrystalline alloy due to plastic deformation due to the enhanced surface friction. The surface of the alloy was prepared based on the effect of the interfacial interactions between the alloy surface and the PCA.
    Sprache Englisch
    Erscheinungsdatum 2022-08-19
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2022.e10325
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  9. Artikel: Microstructure and Strength of Ti-6Al-4V Samples Additively Manufactured with TiC Heterogeneous Nucleation Site Particles.

    Watanabe, Yoshimi / Yamada, Shintaro / Chiba, Tadachika / Sato, Hisashi / Miura, Seiji / Abe, Kenshiro / Kato, Tomotsugu

    Materials (Basel, Switzerland)

    2023  Band 16, Heft 17

    Abstract: Our research aims to investigate the fabrication of additively manufactured (AMed) Ti-6Al-4V samples under reduced power with the addition of TiC heterogeneous nucleation site particles. For this aim, Ti-6Al-4V samples are fabricated with and without TiC ...

    Abstract Our research aims to investigate the fabrication of additively manufactured (AMed) Ti-6Al-4V samples under reduced power with the addition of TiC heterogeneous nucleation site particles. For this aim, Ti-6Al-4V samples are fabricated with and without TiC heterogeneous nucleation site particles using an EOS M 290 machine under optimal parameters and reduced power conditions. The microstructure and tensile behavior of the produced samples were studied. In addition, a single-track test was performed to obtain a good understanding of the suppression of gas pores and balling formation with the addition of TiC heterogeneous nucleation site particles. It was found that the formation of gas pores and balling was suppressed with the addition of heterogeneous nucleation site particles within the metallic powder.
    Sprache Englisch
    Erscheinungsdatum 2023-08-31
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma16175974
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel: [Fatal Cerebral Hemorrhage after Mitral Valve Repair for Active Infective Endocarditis:Report of a Case].

    Hayashi, Nagi / Yoshikai, Masaru / Sato, Hisashi / Kuwano, Akito

    Kyobu geka. The Japanese journal of thoracic surgery

    2021  Band 74, Heft 9, Seite(n) 677–680

    Abstract: Cerebral hemorrhage is a known complication of infective endocarditis (IE) and is associated with a high mortality rate. We herein present a case of fatal cerebral hemorrhage occurring after successful mitral valve repair in a patient in active phase of ... ...

    Abstract Cerebral hemorrhage is a known complication of infective endocarditis (IE) and is associated with a high mortality rate. We herein present a case of fatal cerebral hemorrhage occurring after successful mitral valve repair in a patient in active phase of IE. A 58-year-old male with active IE underwent an urgent mitral valve repair due to systemic embolisms and a massive mobile vegetation on the mitral valve. During the surgery, a rolled autologous pericardium was fixed onto the annulus, therefore we initiated anticoagulation therapy with warfarin. A follow-up brain MRI on the 18th postoperative day showed several cerebral micro bleedings, and on the next day, the patient suffered massive and fatal cerebral hemorrhage. As cerebral hemorrhage can be fatal especially in patients taking anticoagulants, we believe that anticoagulation therapy should be avoided after mitral valve repair in patients who have cerebral micro bleeding in active phase of IE.
    Mesh-Begriff(e) Cerebral Hemorrhage/diagnostic imaging ; Cerebral Hemorrhage/etiology ; Cerebral Hemorrhage/surgery ; Endocarditis/diagnostic imaging ; Endocarditis/surgery ; Endocarditis, Bacterial ; Humans ; Male ; Middle Aged ; Mitral Valve/diagnostic imaging ; Mitral Valve/surgery ; Mitral Valve Insufficiency ; Treatment Outcome
    Sprache Japanisch
    Erscheinungsdatum 2021-07-15
    Erscheinungsland Japan
    Dokumenttyp Case Reports ; Journal Article
    ZDB-ID 603899-2
    ISSN 0021-5252
    ISSN 0021-5252
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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