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- 저자 : 이필수 (검색결과 81 건)
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이필수 대한흉부심장혈관외과학회 1989 Journal of Chest Surgery (J Chest Surg) Vol.22 No.3
Carcinosarcoma is the group of neoplasms possessing both carcinomatous parenchyma and sarcomatous stroma. These tumors are relatively uncommon and may arise in variable organs. In this case, a 62-year-old male patient was admitted to our department due to left chest pain and general weakness of three months duration. The chest x-ray revealed egg-sized, relatively well defined lobulated soft tissue mass in left paracardiac area. Left lower lobectomy was performed under the preoperative impression of lung cancer. Pathologic examination of the resected lung revealed carcinosarcoma without regional lymph node metastasis. Patient is doing well at present without any chemotherapy.
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Design of the 100 MeV Proton-Beam Target System for the Pulsed Neutron Source at the KOMAC
이필수 한국물리학회 2018 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.73 No.8
Among various types of neutron generators, the spallation neutron source is a unique way to generate high-energy and high- ux neutrons in a laboratory. The advantages of the spallation neutron source over other types of generators have been recognized; as a result, several spallation neutron facilities are in operation to provide users with high-quality neutron beams. For satisfying the demand for such a neutron facility in Korea, we have launched a project to construct a spallation neutron source facility by fully utilizing the high-power proton linear accelerator at the Korea Multi- purpose Accelerator Complex (KOMAC) of the Korea Atomic Energy Research Institute (KAERI). In the facility, high-energy spallation neutrons can be generated by bombarding a thick metal target with a 100-MeV, 20-mA pulsed proton beam. In the present study, a neutron target system involving a target, moderator, and re ector (TMR) has been studied through extensive Monte- Carlo simulations. The detailed design of the TMR for generating thermal neutrons and guiding them to the experimental hall will be presented. Here, we present the result of numerical studies and the details of fundamental instruments, and we discuss future plans for the construction of the spallation neutron source facility at the KOMAC.
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Fission counter array for pulse-mode measurements of high-flux and high-energy neutrons
이필수 한국원자력학회 2024 Nuclear Engineering and Technology Vol.56 No.9
This manuscript describes a neutron counting system based on cylindrical fission counters that can monitor neutron activity for high-energy neutron flux above 10 MeV under electrically noisy environments with intense gamma rays. Miniature fission counters with depleted uranium as sensitive material and modular electronics were built for digital signal processing and high-countrate operation. The counters are 9.5 mm in diameter and 71.1 mm in active length. The author presents the results of Monte Carlo simulations of the fission-counter response for selected neutron sources and energies based on ENDF7.1, JENDL-5, and TENDL-2021 nuclear data libraries from 1 meV to 200 MeV. For a white neutron beam (E = 16.36 MeV) that irradiates the front face of a counter, the intrinsic efficiency is evaluated to be (2.24 ± 0.02) × 10 5 counts/n, while the efficiency of the counter in the array appears to increase by at most 6.7%.
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Development and Performance Test of the Analysis Software for the CRIB Active Target
이필수,이춘식,문준영,채경육,차수미,Hidetoshi Yamaguchi,Taro Nakao,David M. Kahl,Shigeru Kubono,Silvio Cherubini,Seiya Hayakawa,Cosimo Signorini 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.3
Software for genuinely event-by-event analysis and event reconstruction of data obtained by usingan active target has been developed in the graphical user interface under the CERN ROOT framework. The primary motivation for developing the software was to provide physicists who performexperiments using an active target a more user-friendly environment for the purpose of investigatingthe performance of detection systems and obtaining ideas about physics from a large amount ofexperimental data. To test the performance of the software, we analyzed experimental data froma 16N radioactive ion beam experiment for α-decay measurements. As a result of the analysis, weobserved the Bragg curve and measured the range of the 16N RI beam in the detector. Data werecalibrated against the calculation after comparing the Bragg curve to the one obtained from anenergy loss calculation in P-10 gas. We present a detailed description of the analysis software andits test results.
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이필수 대한흉부심장혈관외과학회 1989 Journal of Chest Surgery (J Chest Surg) Vol.22 No.5
Cardiac injury remains one of the most spectacular injuries which the present day cardiac surgeon is called upon to treat. Eight consecutive patients with penetrating or blunt injury to the heart underwent operation at the Department of Thoracic and Cardiovascular Surgery, Masan Koryo General Hospital from April 22 88 to April 6 89. l. Among the 8 cases of cardiac injured patients, 7 cases were penetrating injury [stab injury] and one case was blunt injury [traffic accident]. 2. The site of cardiac injury was LV mainly and the next RV, SVC-RA junction in order. 3. The all patients were admitted to our hospital via ER and most of cases, CVP was elevated above 15 cmH2O and 7 of 8 cases were shock state. 4. In 6 of 8 cases revealed cardiomegaly in simple chest X * ray. 5. 7 cases were operated through the median sternotomy, 1 case the right anterolateral thoracotomy. 6. Associated injuries in penetrating cardiac injury were hemothorax, pneumothorax, sternal fracture, lung laceration, LAD transaction in blunt injury, hemoperitoneum.
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이필수 대한흉부심장혈관외과학회 1991 Journal of Chest Surgery Vol.24 No.8
Between April, 1986 and July, 1991, 477 patients underwent open heart surgery with hypothermic cardiopulmonary bypass. There were 242 patients [50.7%] of acyanotic congenital anomalies, 34 patients [7.1%] of cyanotic congenital anomalies, and 187 patients [39.2%] of acquired heart diseases, 8 patients [1.7%] of coronary artery diseases, and 6 patients [1.3%] of mixed anomalies. Among the 276 congenital cardiac anomalies, 147 patients [53.3%] were male and 129 patients [46.7%] were female, ranged in age from 2 years to 58 years. Among the 187 acquired heart diseases, 72 patients [38.5%] were male and 115 patients [61.5%] were female, ranged in age from 10 years to 68 years. The common congenital defect were VSD and ASD in acyanotic cardiac patients, and TOF in cyanotic cardiac patients. Among the 187 acquired heart diseases, 180 patients underwent operation for cardiac valvular diseases, 4 patients were resected left atrial myxoma, and 3 patients underwent operation for aortic regurgitation with ascending aortic aneurysm. The operative mortality rate was 1.2% in acyanotic cardiac patients, 11.8% in cyanotic cardiac patients, and 6.9% in acquired cardiac patients, with overall mortality rate 4.2%.
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