http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Design and characterization of a hemispherical monitoring system for large-area radiation monitoring
Lee Seongyeon,Chung Yoon Soo,Park Chanwoo,Kang In Soo,Baek Min Kyu,Chung Yong Hyun 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.80 No.2
Radiation monitoring systems are needed in the rapidly growing radiation industrial fields. Many monitoring systems have been developed, but have limited ability to identify and locate radioactive materials over large areas. In this study, we designed and characterized a large-area monitoring system in the form of a hemispherical detector to cover a monitoring area with a 2π field of view with 324 spectrometers. GATE simulations and experimental validation were performed to evaluate and characterize the system’s performance. The 2D image of the source location was reconstructed. The results demonstrate the potential use of the proposed monitoring system in a given large area.
Cho, Seongyeon,Lee, Sang Min,Shin, Ho Yun,Kim, Min Su,Seo, Yiel Hea,Cho, Yong Kyun,Lee, Jinwoo,Lee, Sang Pyo,Kim, Moon Il The Royal Society of Chemistry 2018 The Analyst Vol.143 No.5
<P>Nanomaterials that exhibit enzyme-like characteristics, which are called nanozymes, have recently attracted significant attention due to their potential to overcome the intrinsic limitations of natural enzymes, such as low stability and relatively high cost for preparation and purification. In this study, we report a highly efficient colorimetric allergy detection system based on an immunoassay utilizing the peroxidase-mimicking activity of hierarchically structured platinum nanoparticles (H-Pt NPs). The H-Pt NPs had a diameter of 30 nm, and were synthesized by a seed-mediated growth method, which led to a significant amount of peroxidase-like activity. This activity mainly occurs because of the high catalytic power of the Pt element, and the fact that the H-Pt NPs have a large surface area available for catalytic events. The H-Pt NPs were conjugated to an antibody for the detection of immunoglobulin E (IgE) in the analytes; IgE is a representative marker for the diagnosis of allergies. They were then successfully integrated into a conventionally used allergy diagnostic test, the ImmunoCAP diagnostic test, as a replacement for natural signaling enzymes. Using this strategy, total and specific IgE levels were detected within 5 min at room temperature, with high specificity and sensitivity. The practical utility of the immunoassay was also successfully verified by correctly determining the levels of both total and specific IgE in real human serum samples with high precision and reproducibility. The present H-Pt NP-based immunoassay system would serve as a platform for rapid, robust, and convenient analysis of IgE, and can be extended to the construction of diagnostic systems for a variety of clinically important target molecules.</P>
이상목(Lee Sang-Mok),김상연(Kim Seongyeon) 한국생명윤리학회 2012 생명윤리 Vol.13 No.2
한국인의 삶과 죽음에 대한 인식과 태도에 대한 조사는 전국적으로 층화확률추출법에 의해 추출된 표집단 1,000명을 대상으로 전화조사로 이루어 졌다. 설문결과는 한국인은 삶에 대해 상당히 긍정적인 태도를 보여주고 있으며, 죽음에 관해서는 자주 생각하지 않는 편이며, 그다지 두렵게도 생각하지 않는다. 한국인은 영혼의 존재, 죽음후의 삶 그리고 신의 존재에 대해 긍정적이지도 부정적이지도 않다. 나이와 종교, 교육정도, 결혼상태, 부양가족에 따라 삶과 죽음에 대해 각기 다른 인식과 태도를 보여준다. In this paper, Koreans’ perception and attitude toward life and death is studied using the survey data of size 1000 obtained by telephone interview. The survey was carried out using stratified random sampling on the national scale. The survey results show that Koreans have considerably positive perceptions on life, and that Koreans think about death not so often and not so apprehensively. Koreans think the existence of soul, life after death, and god, not positively and not negatively. Depending on age, religion, education, and marital status, respondents have different perception and attitude toward life and death.