177Lu 생산에 따른 작업공간 방사선량률 분석

남성수,장경덕,유권모,박울재 대한방사선방어학회 2021 대한방사선방어학회 학술발표회 논문요약집 Vol.2021 No.11

등방성체의 균열전파 기준에 정적 광탄성 실험 하이브리드 법 적용

남성수,황재석,신동철 대한기계학회 2004 大韓機械學會論文集A Vol.28 No.8

방사성동위원소 용액 분배용 리프트 장치 및 이를 이용한 분배 방법

남성수,박울재,조은하 (사)한국방사선산업학회 2021 방사선산업학회지 Vol.15 No.4

Radiation emitted from radiopharmaceuticals is medically utilized for diagnosis ortreatment of patients. However, radiation produced during the production of radiopharmaceuticalsmay result in unnecessary exposure to workers. This study concerns an automatic distributionsystem of radioactive solutions to minimize radiation exposure by workers in the productionof radiopharmaceuticals. We automated the process of recovering radioactive solutions intosyringes and distributing recovered solutions to empty vials to reduce exposure during the 131Iradiopharmaceuticals production process. In addition, we developed a distribution system thatallows the placement of a number of empty vials and the movement of the tray with empty vialsin order to perform the production process conveniently. The reduction in radiation exposurethat workers receive is directly related to worker safety. If this system is applied to the actualproduction process, it is expected to contribute to the safe performance of the radiopharmaceuticalsproduction process.

APMC 2008 참가기

남성수 한국전자파학회 2009 전자파기술 Vol.20 No.1

방사성동위원소 생산을 위한 표적용기 제작 및 생산효율 측정

남성수,박울재,조은하,임재청 한국방사선산업학회 2021 방사선산업학회지 Vol.15 No.3

A new type of quartz ampoule was manufactured to reduce the contamination aroundthe production system and to increase production efficiency during radioisotope production. Themanufactured quartz ampoule has a small funnel attached to the inside to prevent overflow duringthe chemical process. This has the advantage of reducing losses of the irradiated target materialand minimizing the contamination of production system. 177Lu radioisotope was produced usinga new type quartz ampoule, and it was confirmed that there was no problem with the productionprocess. When comparing the production efficiency of 177Lu with the new type quartz ampouleand the previous model, it was found that the production efficiency was usually increased by 13 to26%. Based on these results, it is planned to apply a new quartz ampoule to neutron irradiationand radioisotope production of various nuclides.

무선 통신 기기에 적합한 다중 대역 칩 슬롯 안테나

남성수(Sung-Soo Nam),이홍민(Hong-Min Lee) 한국전자파학회 2009 한국전자파학회논문지 Vol.20 No.12

본 논문에서는 이동 무선 통신 기기에 적합하고 다중 대역에서 동작하도록 설계된 칩 슬롯 안테나를 제안하였다. 제안된 안테나는 시스템 회로 기판(30 ㎜×60 ㎜×0.8 ㎜) 위에 칩 안테나(10 ㎜×20 ㎜×1.27 ㎜)를 접속시킨 구조이며, 안테나의 F자 형태의 패턴의 끝단은 비아를 통해 시스템 회로 기판과 연결되어졌다. 따라서 칩 안테나는 시스템 회로 기판의 마이크로스트립 선로로부터 접지면 슬롯 사이의 전이(transition)를 통하여 효과적으로 에너지를 방사한다. 제작된 안테나의 측정 결과 3:1 VSWR 임피던스 대역폭(≤-6 ㏈)은 1.98 ㎓(1.61~3.59 ㎓)와 0.8 ㎓(5.2~6 ㎓)로 나타났다. 제안된 안테나는 DCS, PCS, UMTS, WLAN의 주파수 대역을 만족함으로 무선 통신 기기에 적용 가능할 것으로 사료된다. In this paper, the chip slot antenna which is used for mobile devices and designed for multi-band is proposed. The proposed antenna is comprised of a chip antenna(10 ㎜×20 ㎜×1.27 ㎜) and a system circuit board(30 ㎜×60 ㎜×0.8 ㎜). The chip slot antenna is mounted on the system circuit board and the end of F-type strip line which is patterned on the chip antenna is connected by a via with a ground plane of the system circuit board. So, a chip antenna radiates effectively the energy by transition between a microstrip line of the system circuit board and a open slot structure of the chip antenna. In the results of proposed antenna, impedance bandwidth of 3:1 VSWR(-6 ㏈ return loss) is 1.98 ㎓(1.61~3.59 ㎓) and 0.8 ㎓(5.2~6 ㎓). So, it can cover multi-band of DCS, PCS, UMTS, WLAN. The proposed antenna can be applied to mobile devices.

다이폴형 방사 패턴을 갖는 4소자 L-슬롯 배열 모노폴 안테나

남성수(Sung-Soo Nam),이홍민(Hong-Min Lee) 한국전자파학회 2009 한국전자파학회논문지 Vol.20 No.3

본 논문에서는 다이폴형 방사 패턴을 나타내며, 저자세를 갖는 안테나를 제안하였다. 제안된 안테나는 0.43 λ 길이의 L형 슬롯 소자를 기본으로 하여 4개의 슬롯 소자 배열로 평면형 모노폴 안테나의 기저단이 정합구성되었다. 제안된 안테나는 수평면 내에서 무지향성 방사 패턴을 나타내며, 브로드 사이드 방향에서는 영점을 갖는다. 설계에서 커패시턴스 소자로 동작되는 소형 모노폴 안테나를 4개의 L형 슬롯에 의하여 일부분이 제거 되어진 접지 면과 결합시켰다. 그 결과 이들 구조들은 방사를 위한 LC 공진기로 동작하게 된다. 제안된 안테나의 실제 측정 결과, 임피던스 대역폭(VSWR≤2)은 60 ㎒(2.35~2.41 ㎓)로 나타났으며, 동작 중심 주파수 2.38 ㎓에서 최대 이득과 방사 효율은 각각 0.02 ㏈i, 56.7 %로 나타났다. 제안된 안테나는 무선 랜 액세스 포인트 시스템에 적용될 수 있을 것으로 사료된다. In this paper, an antenna which has dipole-like radiation pattern and low profile is proposed. The antenna is composed of four elements slot array based on L-shaped 0.43 λg slot element. It presents a omni-directional radiation patter in the azimuth plane and has a null toward broad-side direction. In the design, a small mono-pole antenna which acts as a large capacitance element, combined with the partially removed ground plane by four L-shaped slots. As a result, these structure act as a LC resonator for radiation. The measured result shows, the impedance bandwidth(VSWR≤2) of the proposed antenna is 60 ㎒(2.35~2.41 ㎓). The measured maximum radiation gain and efficiency of proposed antenna is 0.02 ㏈i, 56.7 % at center frequency 2.38 ㎓, respectively. The proposed antenna can be applied to wireless lan access point system.

이중대역 소형 LTCC 칩 PIFA의 설계 및 구현

남성수(Nam, Sung-Soo),김준형(Kim, June-Hyong),조태준(Cho, Tae-June),이홍민(Lee, Hong-Min) 한국정보전자통신기술학회 2008 한국정보전자통신기술학회논문지 Vol.1 No.1

본 논문에서는 LTCC를 이용한 이중대역을 갖는 소형화된 칩 PIFA를 설계하였다. 제안된 PIFA 는 K-PCS 대역과 WiBro 대역에서 동작시키기 위하여 이중 공진 특성을 갖도록 설계 제작 하였다. 본 안테나는 두개의 층으로 이루어져 있으며 아래 패치는 1.727 ~ 1.847GHz 의 약 120 MHz 대역폭을 갖으며 K-PCS 대역을 만족한다. 위 패치로의 급전을 위해 적층 급전을 이용하였으며 2.302 ~ 2.412 GHz 의 약 110 MHz 대역폭으로써 WiBro 대역을 만족한다. K-PCS 와 WiBro 대역에서 최대 방사 이득은 각각 2.11, 3.71 dBi로 나타났다. 안테나의 소형화를 위해 유전율 8을 갖는 유전체 LTCC를 사용하여 칩 형태로 제작하였다. 제안된 PIFA는 SAR 저감효과를 나타내었다. In this paper, the small PIFA with dual bandwidth using LTCC is the proposed. The proposed PIFA is designed and fabricated for dual resonance bands (K-PCS and WiBro). It consists of two layers. The bottom layer shape PIFA has 120MHz bandwidth (1.727 ~ 1.847 GHz), it satisfied K-PCS. The top layer shape stacked element has 110MHz bandwidth (2.302 ~ 2.412 GHz), it satisfied WiBro. The top layer is stacked on the bottom layer for electric coupling. Maximum radiation gain of K-PCS, WiBro bands are 2.11 dBi, 3.71 dBi respectively. For miniaturization of the antenna structure, the PIFA using LTCC ( εr = 8 ) chip is fabricated. The proposed PIFA shows the effect of SAR reduction also. A defect that is fabricated by stacking up the layers in the design of PIFA is complemented by fabricated in using LTCC chip

4개의 계단형 L-슬롯 구조를 갖는 전방향성 평면 안테나

남성수(Nam, Sung-Soo),이홍민(Lee, Hong-Min) 한국정보전자통신기술학회 2008 한국정보전자통신기술학회논문지 Vol.1 No.3

본 논문에서는 H 평면에서 전방향성 방사패턴을 갖고 저자세를 갖는 평면형 안테나를 제안하였다. 전기적 소형 모노폴 안테나가 갖는 캐패시턴스 성분에 인덕티브 성분의 ENG(Epsilon Negative) 쉘 구조를 부설함으로써 임피던스를 매칭시켰다. ENG 쉘 구조는 4개의 계단형 L-슬롯으로 대칭된 인덕티브 로딩 구조로 이루어져 있다. 실제측정 결과 제안된 안테나의 임피던스 대역폭 ()은 150MHz (2.5 ~ 2.65GHz)를 나타내었고 최대 방사 이득은 중심 주파수 2.56GHz에서 1.12dBi를 나타내었으며 전방향성 방사패턴을 나타내었다. 제안된 안테나는 저자세 높이와 전방향성 방사를 요구하는 시스템에 적용될 수 있을 것으로 사료된다. In this paper, an planar antenna which has omnidirectional radiation pattern in H-plane and low profile is proposed. By adding inductance elements of an ENG shell structure, a capacitance element of an electrically small antenna is easily achieved with impedance matching. An ENG shell structure is consist of a inductive loading structure which has symmetrical four stepped L-shape slots. The simulated result shows, the impedance bandwidth of the proposed antenna is 150MHz (2.5 ~ 2.65GHz). The simulated maximum radiation gain of proposed antenna is 1.12 dBi at center frequency 2.56GHz. Omnidirectional radiation pattern is achieved. The proposed antenna will be applied to wireless lan access point system.

Toxicological properties of the Thyrokitty injection (I-131) for the treatment of the feline hyperthyroidism

임재청,김다미,남성수,조은하,이소영,정혜경,이인기 충북대학교 동물의학연구소 2022 Journal of Biomedical and Translational Research Vol.23 No.4

Following the previous study, the toxicity of a single subcutaneous administration of the Thyrokitty injection (I-131) and the side effects that may occur at therapeutic doses were confirmed. The Thyrokitty injection (I-131) was administered subcutaneously once at a dose of 0, 2.0, 6.0, and 18.0 mCi/kg, 5 male and female rats per group, and mortality, general symptom observation, and weight measurement were performed for 2 weeks, followed by observation of autopsy findings. There were no deaths, and no statistically significant weight change was observed. Mild hair loss, fissures, and crusting were observed by general symptom observation, but it was not a toxic change related to the Thyrokitty injection (I-131). Gastric atrophy and a decrease in the size of the spleen were observed by the autopsy. As a results of single subcutaneous administration of the Thyrokitty Injection (I-131) to rats at a maximum dose of 18.0 mCi/kg, a decrease in the size of the spleen and gastric atrophy were observed as the dose of the Thyrokitty Injection (I-131) increased, which may be related to the test substance. No abnormal findings related to the Thyrokitty injection (I-131) were observed. Therefore, the approximate lethal dose of the Thyrokitty injection (I-131) was 18.0 mCi/kg or more. In addition, as reported for the treatment of feline hyperthyroidism with radioiodine (131I), side effects of the Thyrokitty injection (I-131) are expected to be extremely rare. Temporary dysphagia and fever may occur, but it will recover naturally. It should be administered with caution in cats with diseases such as urinary system, cardiovascular system, gastrointestinal system and endocrine system, especially with kidney disease. And it should not be used in cats who are pregnant, lactating, or likely. It is expected that the Thyrokitty injection (I-131) can be used for clinical treatment in Korea as a veterinary drug.