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Coiling Temperature Controlusing Fountain Pyrometers in a Hot Strip Mill
Shigemasa Nakagawa,Tatsuro Honda,Hisayoshi Tachibana,Chihiro Uematsu,Yasuhiko Buei,Koichi Sakagami 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In the hot strip mill, the quality of the strip greatly depends on the cooling process between the last stand in the finishing mill and the coilers. Therefore, it is important to carefully control the coiling temperature to regulate the mechanical properties of the strip. To realize high temperature accuracy, a new coiling temperature control using fountain pyrometers has been developed. In this paper, the basic concept and operating results of the coiling temperature control using fountain pyrometers are described.
Suppressive Effects of Mesenchymal Stem Cells in Adipose Tissue on Allergic Contact Dermatitis
( Sota Kikuchi ),( Koichi Yanaba ),( Yoshimasa Nobeyama ),( Shigeharu Yabe ),( Masahiro Kiso ),( Hidehisa Saeki ),( Yayoi Tada ),( Hidemi Nakagawa ),( Hitoshi Okochi ) 대한피부과학회 2017 Annals of Dermatology Vol.29 No.4
Background: Allergic contact dermatitis (ACD), which is ac-celerated by interferon (IFN)-γ and suppressed by inter-leukin (IL)-10 as regulators, is generally self-limited after re-moval of the contact allergen. Adipose tissue-derived multi-potent mesenchymal stem cells (ASCs) potentially exert im-munomodulatory effects. Considering that subcutaneous adipose tissue is located close to the site of ACD and includes mesenchymal stem cells (MSCs), the MSCs in adipose tissue could contribute to the self-limiting course of ACD. Objective: The aims of the present study were to elucidate the effects of MSCs in adipose tissue on ACD and to examine any cyto-kine- mediated mechanisms involved. Methods: Ear thick-ness in a C57BL/6 mouse model of ACD using contact hyper-sensitivity (CHS) elicited by 2,4,6-trinitro-1-chlorobenzene was evaluated as a marker of inflammation level. Five and nine mice were injected with ASCs and phosphate-buffered saline (PBS), respectively. After ASC or PBS injection, re-al- time reverse transcription-polymerase chain reaction and enzyme-linked immunosorbent assay were performed. Results: Histology showed that CHS was self-limited and ear thickness was suppressed by ASCs in a dose-dependent manner. IFN-γ expression in the elicited skin site and re-gional lymph nodes was significantly lower in ASC-treated mice than in control mice. IL-10 expression did not differ be-tween treated and control mice. The suppressive effects of ASCs on CHS response did not differ between IL-10 knock-out C57BL/6 mice and wild-type mice. Conclusion: The present findings suggest that MSCs in adipose tissue may contribute to the self-limiting course of ACD through de-creased expression of IFN-γ, but not through increased ex-pression of IL-10. (Ann Dermatol 29(4) 391∼399, 2017)
Neural Mechanisms of Discogenic Back Pain: How Does Nerve Growth Factor Play a Key Role?
Yasuchika Aoki,Seiji Ohtori,Koichi Nakagawa,Arata Nakajima,Gen Inoue,Masayuki Miyagi,Kazuhisa Takahashi 대한척추신경외과학회 2011 Neurospine Vol.8 No.2
It was reported that nerve fibers were present in the inner part of lumbar intervertebral discs from patients with discogenic pain. Because there are no nerve fibers in the inner part of annulus fibrosus in normal condition, this finding suggests nerve ingrowth into the disc may be a cause of discogenic pain. Disc degeneration is often asymptomatic, thus, to understand the differences between symptomatic and asymptomatic disc, it is necessary to understand the pathogenesis of discogenic pain. We recently revealed that over 90% of the nociceptive dorsal root ganglion (DRG) neurons innervating the disc are sensitive to nerve growth factor (NGF), which is related to inflammatory pain. This indicates that discogenic pain is closely related to inflammation and NGF may play a key role. The increase of inflammatory mediators in symptomatic discs has been reported; we therefore studied the effects of disc inflammation and found that it induces sensitization of disc-innervating neurons and nerve ingrowth into the disc. More recently, it was shown that annular rupture induces nerve ingrowth, an increase of inflammatory mediators in the disc, and upregulation of calcitonin gene-related peptide, a pain-related molecule in DRGs. These findings led us to believe that annular rupture triggers inflammation and nerve ingrowth, inflammatory mediators then further promote nerve ingrowth into the disc and sensitization of disc-innervating neurons, and discogenic pain finally becomes chronic. NGF, found in symptomatic discs, may act as a key factor in generating chronic discogenic pain by sensitizing disc-innervating neurons and stimulating nerve ingrowth into the disc.
Newly Developed Fountain Pyrometer for a Running Hot Strip in the Cooling Banks of a Hot Strip Mill
Tatsuro Honda,Shigemasa Nakagawa,Chihiro Uematsu,Hisayoshi Tachibana,Yasuhiko Buei,Koichi Sakagami 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Temperature control of a hot strip has been important in run-out table of hot strip mill in order to stabilize and improve the material properties of its products. We developed a new temperature measurement method for hot stripcooled by a lot of water in the cooling banks. And we developed control system using the new measurement method and confirmed that the system could control hot strip temperature accurately. We explain the principle of the new measurement method and its online test result in this paper.
Tsuruta, Daisuke,Hayashi, Akihide,Kobayashi, Hiromi,Nakagawa, Koichi,Furukawa, Masayoshi,Ishii, Masamitsu S. Karger AG 2005 Dermatology Vol.210 No.4
<P>We describe 4 cases of pseudocyst of the scalp, which still is only being described in the Japanese literature. The tumor is characterized as follows: localized between the top and the forehead area of the scalp, it first appears as a solitary reddish, painful small nodule or papule; it then gradually increases in size, protruding into a dome-shaped mass, and becomes associated with alopecia limited to the lesion area. This report describes typical cases of pseudocyst of the scalp, reviews the reported Japanese cases and introduces this tumor to western dermatology.</P><P>Copyright © 2005 S. Karger AG, Basel</P>
Umeda Ryo,Iijima Yasushi,Yamakawa Nanako,Kotani Toshiaki,Sakuma Tsuyoshi,Kishida Shunji,Ueno Keisuke,Kajiwara Daisuke,Akazawa Tsutomu,Shiga Yasuhiro,Minami Shohei,Ohtori Seiji,Nakagawa Koichi 대한척추외과학회 2023 Asian Spine Journal Vol.17 No.6
Study Design: Retrospective study.Purpose: To investigate the clinical manifestations of a fragility fracture of the sacrum (FFS) and the factors that may contribute to a misdiagnosis.Overview of Literature: The number of patients diagnosed with FFS has increased because of extended life expectancy and osteoporosis. Patients with FFS may report nonspecific symptoms, such as back, buttock, groin, and/or leg pain, leading to a misdiagnosis and a delay in definitive diagnosis.Methods: Fifty-six patients (13 males and 43 females) with an average age of 80.2±9.2 years admitted to the hospital for FFS between 2006 and 2021 were analyzed retrospectively. The following patient data were collected using medical records: pain regions, a history of trauma, initial diagnoses, and rates of fracture detection using radiography, computed tomography (CT), and magnetic resonance imaging (MRI).Results: Forty-one patients presented with low back and/or buttock pain, nine presented with groin pain, and 17 presented with thigh or leg pain. There was no history of trauma in 18 patients (32%). At the initial visit, 27 patients (48%) were diagnosed with sacral or pelvic fragility fractures. In contrast, 29 patients (52%) were initially misdiagnosed with lumbar spine disease (23 patients), hip joint diseases (three patients), and buttock bruises (three patients). Fracture detection rates for FFS were 2% using radiography, 71% using CT, and 93% using MRI. FFS was diagnosed definitively using an MRI with a coronal short tau inversion recovery (STIR) sequence.Conclusions: Some patients with FFS have leg pain with no history of trauma and are initially misdiagnosed as having lumbar spine disease, hip joint disease, or simple bruises. When these clinical symptoms are reported, we recommend considering FFS as one of the differential diagnoses and performing lumbar or pelvic MRIs, particularly coronal STIR images, to rule out FFS.