http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
ASIA SPINE: The Past, Present, and Future
신동아,김영수,Hiroshi Nakagawa,서정근,김세훈 대한척추신경외과학회 2018 Neurospine Vol.15 No.1
The sharing of international academic accomplishment and friendship is important; furthermore, to better understand and anticipate the future, we should look back and remember where we started. Regarding ASIA SPINE, the authors aimed to record how the pioneers of Asian spinal surgery started this spine meeting series more than 20 years ago and that later developed into the present state of the conference. The authors will also explore the possible future of this conference. In June 1996, when Professor Hiroshi Nakagawa organized the 11th Annual Meeting of the Japanese Society of Spinal Surgery, spinal neurosurgeons from Korea and Japan including Professor Young Soo Kim, Professor Jung Keun Suh, and Professor Nakagawa discussed the establishment of a multinational conference on spinal surgery via a partnership between the 2 countries. Finally, from September 18 to 20, 1997, the First Biennial Meeting of the Japan-Korea Conference on Spinal Surgery was held in Nagoya, Japan, with Professor Hiroshi Nakagawa as the first organizing President. From then, a biennial meeting was held every other year in Korea or Japan until 2009. In September 2010, the next generation of spinal neurosurgeons decided to organize the first meeting of ASIA SPINE in Incheon, Korea, in order to represent all Asian spine specialists. This meeting has been since held annually around the region including in Taiwan. Remembering the pioneers in the field of spinal surgery is invaluable and extremely important. The authors hope that interest in ASIA SPINE will further expand to other nations in Asia who have advanced philosophies and refined technologies. We wish ASIA SPINE continued success and the ability to promote prolonged international friendship among the Asian countries.
A New Electrophysiological Method for the Diagnosis of Extraforaminal Stenosis at L5–S1
Hiroshi Iwasaki,Munehito Yoshida,Hiroshi Yamada,Hiroshi Hashizume,Akihito Minamide,Yukihiro Nakagawa,Masaki Kawai,Shunji Tsutsui 대한척추외과학회 2014 Asian Spine Journal Vol.8 No.2
Study Design: A retrospective study. Purpose: To examine the effectiveness of using an electrodiagnostic technique as a new approach in the clinical diagnosis of extraforaminal stenosis at L5–S1. Overview of Literature: We introduced a new effective approach to the diagnosis of extraforaminal stenosis at the lumbosacral junction using the existing electrophysiological evaluation technique. Methods: A consecutive series of 124 patients with fifth lumbar radiculopathy were enrolled, comprising a group of 74 patients with spinal canal stenosis and a second group of 50 patients with extraforaminal stenosis at L5–S1. The technique involved inserting a pair of needle electrodes into the foraminal exit zone of the fifth lumbar spinal nerves, which were used to provide electrical stimulation. The compound muscle action potentials from each of the tibialis anterior muscles were recorded. Results: The distal motor latency (DML) of the potentials ranged from 11.2 to 24.6 milliseconds in patients with extraforaminal stenosis. In contrast, the DML in patients with spinal canal stenosis ranged from 10.0 to 17.2 milliseconds. After comparing the DML of each of the 2 groups and at the same time comparing the differences in DML between the affected and unaffected side of each patient, we concluded there were statistically significant differences (p <0.01) between the 2 groups. Using receiver operating characteristic curve analysis, the cutoff values were calculated to be 15.2 milliseconds and 1.1 milliseconds, respectively. Conclusions: This approach using a means of DML measurement enables us to identify and localize lesions, which offers an advantage in diagnosing extraforaminal stenosis at L5–S1.
THE NEXT-GENERATION INFRARED ASTRONOMY MISSION SPICA UNDER THE NEW FRAMEWORK
NAKAGAWA, TAKAO,SHIBAI, HIROSHI,ONAKA, TAKASHI,MATSUHARA, HIDEO,KANEDA, HIDEHIRO,KAWAKATSU, YASUHIRO The Korean Astronomical Society 2015 天文學論叢 Vol.30 No.2
We present the current status (as of August 2014) of SPICA (Space Infrared Telescope for Cosmology and Astrophysics), which is a mission optimized for mid- and far-infrared astronomy with a cryogenically cooled 3m-class telescope. SPICA is expected to achieve high spatial resolution and unprecedented sensitivity in the mid- and far-infrared, which will enable us to address a number of key problems in present-day astronomy, ranging from the star-formation history of the universe to the formation of planets. We have carried out the "Risk Mitigation Phase" activity, in which key technologies essential to the realization of the mission have been extensively developed. Consequently, technical risks for the success of the mission have been significantly mitigated. Along with these technical activities, the international collaboration framework of SPICA has been revisited, which resulted in la arger contribution from ESA than that in the original plan. To enable the ESA participation under the new framework, a SPICA proposal to ESA is under consideration as a medium-class mission under the framework of the ESA Cosmic Vision. The target launch year of SPICA under the new framework is the mid-2020s.
THE NEXT-GENERATION INFRARED SPACE MISSION SPICA: PROJECT UPDATES
TAKAO NAKAGAWA,Hiroshi Shibai,HIDEHIRO KANEDA,Kotaro Kohno,Hideo Matsuhara,Hiroyuki Ogawa,TAKASHI ONAKA,Peter Roelfsema,Toru Yamada 한국천문학회 2017 天文學論叢 Vol.32 No.1
We present project updates of the next-generationinfrared space mission SPICA (Space Infrared Telescope for Cosmology and Astrophysics)as of November 2015. SPICA isoptimized for mid- and far-infrared astronomy with unprecedented sensitivity, which will be achievedwith a cryogenically cooled (below 8 K), large (2.5~m) telescope. SPICA is expected to address a number ofkey questions in various fields of astrophysics, ranging from studies of the star-formation history in theuniverse to the formation and evolution of planetary systems. The international collaboration framework of SPICA has been revisited. SPICA under the new framework passed the Mission Definition Review by JAXA in 2015. A proposal under the new framework to ESA is being prepared. The target launch year in the new framework is 2027/28.
댐 저수지에서 alkaline phosphatase 활성의 수직변화와 미생물 요인들과의 상관관계
( Hirotani Hiroshi ),( Ayumi Nakagawa ),( Hisanori Kagawa ) 한국하천호수학회 2004 생태와 환경 Vol.37 No.4
The alkaline phosphatase activity (APA) of two dam reservoirs and inflowing streams were measured monthly in 2000. During summer months in 2001, the vertical profiles of APA and related parameters were also examined in one of the reservoirs. The APA was relatively high during the summer season in the epilimnion while it was almost invariable in the hypolimnion. A small increase in APA was observed at just above the bottom. The APA fluctuation was independent of the concentration of soluble reactive phosphorus. It was assumed that APA is not indicative of the phosphorus availability status. An examination of size-fractionated samples suggested that APA in reservoirs was attached to particles larger than 0.4 ㎛, whereas in streams it existed in a dissolved form. There was a positive significant correlation between chlorophyll α concentration and APA in the photic zone. In the aphotic zone, APA correlated positively with the colony count of heterotrophic bacteria, but not with microscopic total bacterial counts.
( Shuji Taketomi ),( Hiroshi Inui ),( Takaki Sanada ),( Kensuke Nakamura ),( Ryota Yamagami ),( Hironari Masuda ),( Sakae Tanaka ),( Takumi Nakagawa ) 대한슬관절학회 2014 대한슬관절학회지 Vol.26 No.3
Introduction: Recently, remnant-preserving anterior cruciate ligament (ACL) reconstruction has been increasingly performed to achieve revascularization, cell proliferation, and recovery of high-quality proprioception. However, poor arthroscopic visualization makes accurate socket placement during remnant-preserving ACL reconstruction difficult. This study describes a surgical technique used to create an anatomical femoral socket with a three-dimensional (3D) fluoroscopy based navigation system during technically demanding remnant-preserving ACL reconstruction. Surgical Technique: After a reference frame was attached to the femur, an intraoperative image of the distal femur was obtained, transferred to the navigation system and reconstructed into a 3D image. A navigation computer helped the surgeon visualize the entire lateral wall of the femoral notch and lateral intercondylar ridge, even when the remnant of the ruptured ACL impeded arthroscopic visualization of the bone surface. When a guide was placed, the virtual femoral tunnel overlapped the reconstructed 3D image in real time; therefore, only minimal soft tissue debridement was required. Materials and Methods: We treated 47 patients with remnant-preserving ACL reconstruction using this system. The center of the femoral socket aperture was calculated according to the quadrant technique using 3D computed tomography imaging.Results: The femoral socket locations were considered to be an anatomical footprint in accordance with previous cadaveric studies.Conclusions: The 3D fluoroscopy-based navigation can assist surgeons in creating anatomical femoral sockets during remnant-preserving ACL reconstruction.