Ethical Behaviors for Conducting Research based on the Perspective of Marketing Researchers

Junhyuck SUH(Junhyuck SUH) 한국연구윤리학회 2023 연구윤리 Vol.4 No.1

Structural Design and Stability Simulation of Polymer Sponge for TBP and Dodecane Separation in Liquid Waste

Junhyuck Im,Jongjin Kim,Hyungwoo Kim,Donghoon Seoung 한국방사성폐기물학회 2018 한국방사성폐기물학회 학술논문요약집 Vol.2018 No.10

Development of Characterization Database Management System for Radioactive Waste Disposal

Junhyuck Im,Dooseong Hwang,Junhee Lee,Minyoung Kang,Sam Hee Han,Sung Jin Joo,Geun-Ho Kim 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

The decommissioning of Korea Research Reactor Units 1 and 2 (KRR-1&2), the first research reactors in South Korea, began in 1997. Approximately 5,000 tons of waste will be generated when the contaminated buildings are demolished. Various types of radioactive waste are generated in large quantities during the operation and decommissioning of nuclear facilities, and in order to dispose of them in a disposal facility, it is necessary to physico-chemically characterize the radioactive waste. The need to transparently and clearly conduct and manage radioactive waste characterization methods and results in accordance with relevant laws, regulations, acceptance standards is emerging. For radioactive waste characterization information, all information must be provided to the disposal facility by measuring and testing the physical, chemical, and radiological characteristics and inputting related documents. At this time, field workers have the inconvenience of performing computerized work after manually inputting radioactive waste characterization information, and there is always a possibility that human errors may occur during manual input. Furthermore, when disposing of radioactive waste, the production of the documents necessary for disposal is also done manually, resulting in the aforementioned human error and very low production efficiency of numerous documents. In addition, as quality control is applied to the entire process from generation to treatment and disposal of radioactive waste, it is necessary to physically protect data and investigate data quality in order to manage the history information of radioactive waste produced in computerized work. In this study, we develop a system that can directly compute the radioactive waste characterization information at the field site where the test and measurement are performed, protect the stored radioactive waste characterization data, and provide a system that can secure reliability.

A Development of the Quantitative Analysis Method for Np in Solutions by Various Radiometric Methods and Absorption Spectroscopy

Junhyuck Kim,Hye-Ryun Cho,Jae-Il Park 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.2

Neptunium (Np) is one of the daughter elements included in the decay chain of Pu. The quantitative analysis of Np isotopes is required for radioactive waste characterization, research on actinide chemistry, etc. Np-237 has a long half-life (2.144 million years), but its daughter Pa-233 has a relatively short half-life (26.975 days). For this reason, after a sufficient time elapses following the chemical preparation process of the analyte, the two nuclides are in radiation equilibrium in the sample. Np-237 emits alpha-rays while Pa-233 emits beta-rays. Both nuclides also emit gamma- and X-rays. In this study, alpha-rays were measured using liquid scintillation counting (LSC) method and alpha spectrometry. Gamma-spectrometry with a HPGe detector was used for the analysis of gammaand X-rays. In addition, we compared the radiometric results with quantitative analysis of Np using UV-Vis absorption spectrometry. The LSC method and the HPGe gamma-spectroscopy do not require extensive sample preparation procedures. Alpha spectroscopy requires a standard material spiking, separation by coprecipitation, and disk-type sample preparation procedure to obtain measurement efficiency and recovery factor. A reference material sample with a concentration of 5.8 mM was analyzed by the four analysis methods, and all of the measured results agreed well within a difference level of 4%.

Study on Thermal Stability and Structural Changes of the Sr-exhanged Natrolite

Junhyuck Im,Jaewoo Jung,Kiho Yang,Donghoon Seoung,Yongmoon Lee 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.2

The radioactive Sr-90, which is formed from beta decay, is well known as one of the most commonly detected nuclides in radioactive waste. In 2015, it was reported that Sr-90 was observed in some soil and metal wastes among the 516 drums of radioactive waste transferred from the decommissioning site of the Korea Research Reactor (in Seoul) to the disposal site (in Gyeongju). Decontamination and sequestration of radionuclides, including Sr, from nuclear waste is important because they are hazardous and harmful to the ecological environment. Immobilization of these nuclides using a zeolite framework is suitable and simple method that has been widely studied. Therefore, it is still necessary to continuously explore the thermal stability of various zeolites and environmental changes around adsorbed cations in zeolite pore for effective immobilization of these radionuclides. In this study, we observed the thermal stability in fully Sr-exchanged natrolite (Sr-NAT), one of small-pore zeolite, from room temperature to 350°C using the in-situ synchrotron X-ray powder diffraction and thermogravimetric (TGA) analysis. In addition, we investigated the structural changes in Sr-NAT during temperature increase by Rietveld analysis. Sr-NAT exhibited apparent zero thermal expansions (ZTE) with the thermal expansion coefficients of -3(1) × 10-6 at the initial stage of increasing the temperature due to dehydration process. In the section from 250°C to 300°C, a phenomenon like negative thermal expansion (NTE) occurs in which the unit cell volume of Sr-NAT decreases despite the increase in temperature. Sr-NAT maintained well its crystallinity up to 350°C, and it became amorphous at 350°C. In this study, we provide a fundamental understanding of the structural changes and thermal stability mechanism of Sr-exchaged zeolite natrolite with increasing temperature.

A Study on the Relationship between Green Marketing Strategy and CSR Policy

Junhyuck SUH 한국유통과학회 2023 The Journal of Industrial Distribution & Business( Vol.14 No.2

Purpose: This research examines the relationship between green marketing strategy and CSR policy and identifies how companies can leverage this relationship to attract green customers. The conceptual model for this study shows the relevance of companies adopting both green marketing strategies and CSR policies to show how committed they are regarding environmental sustainability and fulfill their responsibilities towards various stakeholders. Research design, data and methodology: This research has conducted the literature content approach and the key measures used for this study were based on mostly peer-reviewed journal articles. Those studies already indicated the high degree of reliability and validity. Consequently, the current researcher removed conference papers into the analysis. Results: This research provides brief suggestions for companies to incorporate the findings of this study into their green marketing strategies and CSR policies. Companies that align their green marketing strategies with their CSR policies, and CSR policies with their customers' values, are more likely to attract environmentally conscious customers and increase their loyalty. Conclusions: This research concludes that there exists a positive relationship between green marketing strategy and CSR policy and the outcomes of this research add to the body of knowledge on how these two concepts can be integrated to achieve business and societal benefits.

Multi-functional Carbon Nanotube Nanocomposites Assembled with DNA-Binding Peptide Anchors

Junhyuck Chang,Kyung-Il Kim,Seokyoung Yoon,Seonghyun Lee,Byungkwon Lim,Kyubong Jo,Jung Heon Lee 한국진공학회 2020 한국진공학회 학술발표회초록집 Vol.2020 No.8

A Scenery Preparation Situation and Improvement Plan of Indoor Gardening in Subway Stations - Comparison with Seoul Metropolitan Area and Other Metropolitan City

Junhyuck Yoon,Hyeoncheol Shin,Sumin Choi,Jaesung Yun,Kyoungok Choi 전북대학교 휴양및경관계획연구소 2015 휴양및경관연구 (J East Asian Landscape Studies) Vol.9 No.1

This study examined the preparations carried out to establish indoor garden areas in Seoul metropolitan subway stations and in 5 other metropolitan cities subway stations in order to present findings on how these preparations might be improved. The preparation ratio for indoor garden areas among Seoul metropolitan subway stations was 6.9%, 38 places, and the ratio overall for 5 metropolitan cities was 21.6%, 54 places. Among the 5 metropolitan cities, the ratio was 26.7% in Busan metropolitan city, 20.0% in Gwangju metropolitan city, 11.6% in Daegu metropolitan city, 18.2% in Daejeon metropolitan city, and 10.3% in Incheon metropolitan city. With regard to the results comparing the decoration ratio with natural flowers and artificial flowers among the prepared stations with indoor gardens, in the case of Seoul metropolitan area, places decorated with natural flowers numbered 23, and the ratio was 60.5%, but, in case of the 5 metropolitan cities, places decorated with natural flowers numbered just 6, and the ratio was just 11.1%. In the case of garden ornaments as material introduced in Seoul metropolitan area subway stations decorated with natural flowers and the 5 metropolitan cities subway stations, one to three kinds of ornament were introduced per each place, and the ornament items included rocks, garden lanterns, ponds, stone mortars, stone lamps, fountains, sculptures, mini water mills, and windmills. The introduced trees at subway stations in Korea that were decorated with natural flowers included 93 species of 70 genera of 45 families. The introduced trees included 87 species of 67 genera of 42 families in Seoul metropolitan area subway stations, and the introduced trees included 28 species of 16 genera of 11 families in the 5 metropolitan cities subway stations. Native trees included 21 species of 20 genera of 17 families. As for scenery formation elements according to the height of trees, in the case of Seoul metropolitan area, the introduced trees included 22 species of upper trees, 15 species of middle trees, and 46 species of lower trees. In the case of the 5 metropolitan cities, the introduced trees included 1 species of upper trees, 5 species of middle trees, and 18 species of lower trees. Therefore, volume and visual diversity in Seoul metropolitan area was provided by the height and bulk of trees, but the volume of scenery and diversity in the 5 metropolitan cities was insufficient. In the case of Seoul metropolitan area, using indoor garden spaces is necessary to connect with mini libraries, resting spaces, and snack bars, and various using types are necessary. In the case of the 5 metropolitan cities, only the visual image was provided, and therefore an activation plan for using spaces is necessary.

Compression Behavior Studies on Ammonium Molybdophosphate (AMP)

Junhyuck Im,Yongjae Lee 한국방사성폐기물학회 2017 한국방사성폐기물학회 학술논문요약집 Vol.2017 No.05

Development of a Treatment System for Decommissioning Radwaste

Junhyuck Im,Dooseong Hwang,Junhee Lee,Minyoung Kang,Geun-Ho Kim 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.1

During the operation or decommission of nuclear facilities, a large amount of dry active waste and cable waste with various shape and material is generated. Most of these wastes have almost no radioactive contamination and can be disposed of by incineration, landfill, recycling, etc. under clearance regulation. For clearance of radioactive waste, it is necessary to verify the characteristics of radiological contamination and prove that it meets the criteria for clearance regulation. According to the domestic clearance regulation, if it is difficult to measure radioactivity of wastes due to their surface condition using direct or indirect measurement methods, representative samples should be collected and analyzed for radioactivity. When sampling, it is desirable to collect samples of about 1 kg that can represent waste contamination per 200 kg or per 1 m2, and the homogeneity of the samples also should be demonstrated. However, in the case of dry active wastes, it is very difficult to prove the homogeneity of the samples because of surface shapes and conditions of the wastes. In particular, considering cable waste generated during the decommission, it is hardly capable to prove the representativeness of the sample, even though the inner shell of the covering material and the copper wire are almost uncontaminated. In this study, we show the development of a treatment system that makes it easy to prove the representativeness of samples when disposing of dry active waste or cable waste generated in nuclear facilities. The treatment device is designed in such a way that it has different storage unit and cutting unit suitable for the material characteristics of each waste type (soft, hard and cable), and therefore optimizes the efficiency of the shredding or cutting process. In addition, it is expected that the work efficiency in the radioactive treatment site with a narrow area can also be improved by providing a moving part on the device.