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Application of Large Eddy Simulation to Diesel Spray
Tsukasa Hori,Jiro Senda,Tanaka Hiroshi,Kyosuke Irie,Kazuya Machida,Yasuo Moriyoshi,Hajime Fujimoto 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The validation of an evaporative spray simulation with LES has been conducted using Rayleigh scattering method. Rayleigh scattering method is able to measure the instantaneous equivalence ratio on the spray cross section, assuming adiabatic mixture between ambient gas and fuel to estimate the mixture temperature. It is used to validate an evaporative spray simulation with LES. The results showed that the LES simulation was possible to reproduce the evaporative spray development in the quasi-steady condition, using the finer computational grid. In order to improve the computational accuracy, the radial development of the gas velocity from the spray upstream should be reproduced by the improvement of the computational scheme and the spray modeling.
Collecting Plant Floor Data using Agent Embedded in Controller
Satoru Hori,Hiromitsu Kato,Hiroshi Fujii,Seiichi Shin 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In the industrial and robotic fields, equipment manufacturers and system vendors have engaged instandardization activities in order to guarantee interconnection and interoperation and improve productivity andcompetitiveness. Recently, more system flexibility and cost efficiency than before have become necessary due to theintensity of market competition and diversity of customer needs. In plant-floor systems, the need for total costownership reduction has been growing. To meet this need, Japanese organizations use the concept of “Mieruka”, i.e.,visualization, to share and utilize information by making it visible in an easily understandable form. To achieve“Mieruka”, we need to be able to utilize plant-floor level data by flexibly collecting and seamlessly handling the datafrom various devices. We describe our standardization activities in the industrial field, propose a plant-floor level datacollection method using an agent embedded in a controller to flexibly collect data, and discuss an application of thestandardized data model interface that we previously proposed, Super Distributed Objects (SDO), to utilize collecteddata.
Taniwaki hiroshi,Matsumura Akira,Kinoshita Yuki,Hoshino Masatoshi,Namikawa Takashi,Hori Yusuke,Nakamura Hiroaki 대한척추외과학회 2024 Asian Spine Journal Vol.18 No.3
Study Design: Retrospective single-center study.Purpose: This study aimed to examine the factors associated with the self-image domain of the Scoliosis Research Society-22 revised (SRS-22r) in patients who underwent corrective surgery for adult idiopathic scoliosis (AdIS).Overview of Literature: Adult spinal deformity (ASD) can be classified into AdIS and de novo scoliosis. However, no studies have investigated the effect of different ASD pathologies on self-image.Methods: This study enrolled 60 patients who underwent corrective surgery and were followed up for >2 years postoperatively. AdIS was defined as adolescent idiopathic scoliosis in patients who had no history of corrective surgery, had a primary thoracolumbar/lumbar (TL/L) curve, and were ≥30 years old at the time of surgery.Results: The AdIS (n=23; mean age, 53.1 years) and de novo (n=37; mean age, 70.0 years) groups were significantly different in terms of the main thoracic and TL/L curves, sagittal vertical axis, thoracic kyphosis, and thoracolumbar kyphosis preoperatively. The scores in the self-image domain of the SRS-22r (before surgery/2 years after surgery [PO2Y]) were 2.2/4.4 and 2.3/3.7 in the AdIS and de novo groups, respectively, and PO2Y was significantly different between the two groups (p<0.001). Multivariate regression analysis revealed that AdIS was an independent factor associated with self-image at PO2Y (p=0.039).Conclusions: AdIS, a spinal deformity pathology, was identified as a significant factor associated with the self-image domain of SRS-22r in patients who underwent corrective surgery. AdIS is not solely classified based on pathology but also differs in terms of the clinical aspect of self-image improvement following corrective surgery.
Kenji Horie,Yukiyasu Tsutsumi,Hyeoncheol Kim,Moonsup Cho,Hiroshi Hidaka,Kentaro Terada 한국지질과학협의회 2009 Geosciences Journal Vol.13 No.3
Zircon U–Pb geochronology was applied to a migmatitic gneiss in the Busan gneiss complex, Gyeonggi massif, Korea. 207Pb/206Pb ages of concordant zircon grains reveal that overgrowth rims with Th/U ratios lower than 0.1 formed at 1937 ± 6 Ma during the migmatization and mantled the inherited cores of ca. 3500–2200 Ma. The 207Pb/206Pb age of the rims is consistent with the monazite Th–total Pb age (ca. 1938 Ma), suggesting that the rims are the product of Paleoproterozoic regional metamorphism. Our zircon age data are not sufficient for discerning the tectonic affinity of the Busan gneiss complex belonging to either Gyeonggi or Yeongnam massif. However, consistency of these ages with the ca. 1930 Ma Pb–Pb age reported from the Bagdalryeong gneiss complex, Gyeonggi massif, supports the tectonic model that the Busan gneiss complex is a part of the Gyeonggi massif. Discordant U–Pb data obtained from the zircon rims (293 ± 31 Ma) and the monazite Th–total Pb age (ca. 289 Ma) suggest that the Busan gneiss complex was affected by the Early Permian regional metamorphism during the Ogcheon (Okcheon) Orogeny. Therefore, we conclude that the Busan gneiss complex is a part of the Gyeonggi massif occurring as either a basement rock of the Ogcheon (Okcheon) metamorphic rocks, or a tectonically emplaced, exotic piece affected by the Early Permian Ogcheon (Okcheon) metamorphism. In addition, our U–Pb data suggest that the Busan complex is possibly linked with the Hida–Oki terrane in Japanese Islands.
Tropylium Derivatives as New Entrants that Sense Quadruplex Structures
Daisuke Hori,Ji Hye Yum,Hiroshi Sugiyama,Soyoung Park 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
G-quadruplex (G4) is the most well-known noncanonical conformation of DNA involved in diverse pharmacological and biological contexts. G4 ligands have been extensively developed as molecular probes and tumor therapeutic reagent candidates. Currently used ligands are commonly aromatic, planar, and electron deficient for effective interaction with quadruplex-stranded DNAs. We recognized that tropylium cations possess the aforementioned features of effective quadruplex ligands. In this study, we prepared tropylium derivatives to validate their binding affinity with G4 and i-motif. Titration experiments revealed interaction between quadruplex structures and tropylium derivatives. We propose tropylium derivatives as new structural motifs indicating quadruplex-specific binding abilities. Our ligands possess the following advantages: small size, facile synthesis, and high solubility in aqueous conditions.
Lymphadenectomy issues in endometrial cancer
Yosuke Konno,Hiroshi Asano,Ayumi Shikama,Daisuke Aoki,Michihiro Tanikawa,Akinori Oki,Koji Horie,Akira Mitsuhashi,Akira Kikuchi,Hideki Tokunaga,Yasuhisa Terao,Toyomi Satoh,Kimio Ushijima,Mitsuya Ishika 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.2
Objectives: This review aims to introduce preoperative scoring systems to predict lymphnode metastasis (LNM) and ongoing clinical trials to investigate the therapeutic role oflymphadenectomy for endometrial cancer. Methods: We summarized previous reports on the preoperative prediction models forLNM and evaluated their validity to omit lymphadenectomy in our recent cohorts. Next, wecompared characteristics of two ongoing lymphadenectomy trials (JCOG1412, ECLAT) toexamine the survival benefit of lymphadenectomy in endometrial cancer, and described thedetails of JCOG1412. Results: Lymphadenectomy has been omitted for 64 endometrial cancer patients who met low risk criteria to omit lymphadenectomy using our scoring system (LNM score) and no lymphaticfailure has been observed. Other two models also produced comparable results. Two randomizedphase III trials to evaluate survival benefit of lymphadenectomy are ongoing for endometrialcancer. JCOG1412 compares pelvic lymphadenectomy alone with pelvic and para-aorticlymphadenectomy to evaluate the therapeutic role of para-aortic lymphadenectomy for patients atrisk of LNM. For quality assurance of lymphadenectomy, we defined several regulations, includinglower limit of the number of resected nodes, and submission of photos of dissected area toevaluate thoroughness of lymphadenectomy in the protocol. The latest monitoring report showedthat the quality of lymphadenectomy has been well-controlled in JCOG1412. Conclusion: Our strategy seems reasonable to omit lymphadenectomy and could begeneralized in clinical practice. JCOG1412 is a high-quality lymphadenectomy trial in terms ofthe quality of surgical procedures, which would draw the bona-fide conclusions regarding thetherapeutic role of lymphadenectomy for endometrial cancer.