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Module level EMC verification method for replacement items in nuclear power plant

  • Hee-Taek Lim;Moon-Gi Min;Hyun-Ki Kim;Gwang-Hyun Lee;Chae-Hyun Yang
    • Nuclear Engineering and Technology
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    • v.55 no.7
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    • pp.2407-2418
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    • 2023
  • Internal replaceable electronic module substitutions can impact EMC (ElectroMagnetic Compatibility) qualification testing and results if EMC testing is conducted at the cabinet level. The impact of component substitutions on EMC qualification results therefore should be evaluated. If a qualitative evaluation is not adequate to ensure that the modified product will not impact the cabinet level EMC qualification results, a new qualification testing should be conducted. Component level retesting should be conducted under electromagnetically equivalent conditions with the cabinet level test. This paper analyzes the propagation of conducted susceptibility test waveforms in a representative cabinet and evaluates the impact of component substitutions on cabinet level EMC qualification results according to the location of the replacement items. A guideline for a qualitative evaluation of the impact of component substitutions is described based on the propagation of the conducted susceptibility test waveforms. A module level test method is also described based on an analysis of the shielding effectiveness of the cabinet.

Is a Cause-Related Self-Prevention Campaign a Good CSR Strategy?: Effects of Negative Social Acceptance and Consumer Attitude on Biased Evaluations

  • Park, Jihye
    • Asia Marketing Journal
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    • v.19 no.2
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    • pp.25-43
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    • 2017
  • This paper addresses the central issue of whether it is effective for a firm to discourage the purchase of its own product in order to support a social cause. The objectives of this study were: a) to examine whether a cause-related self-prevention ad would stimulate more positive evaluations compared to promotional ad, particularly when the product category is more negatively socially accepted; and 2) to determine if a negative attitude toward the product could induce a boomerang effect of a selfprevention ad. Results from three experiments revealed that socially responsible prevention campaigns against firm's own product may be more effective for the product category negatively associated with social concerns or welfare. If products are more limited in the social context, communications of product prevention are beneficial to improve the public image of the brand. However, the self-hurting approach may be inappropriate for potential customers who currently possess a strong negative attitude toward the product.

Analysis of EQ pH Condition and Fission Product Removal Capability for Nuclear Power Plant (원전의 내환경기기검증 화학환경 및 핵분열생성물 제거능력 평가)

  • Song, Dong Soo;Ha, Sang Jun;Seong, Je Joong;Jeon, Hwang Yong;Huh, Seong Cheol
    • Journal of Energy Engineering
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    • v.23 no.3
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    • pp.186-190
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    • 2014
  • Nuclear Power Plants require the control ability of chemical condition (pH) because pH control during transient accident such as LOCA makes an able the fission product removal capability to be maintained, stress corrosion cracking of stainless steel equipment to be prevented and the production of hydrogen by aluminum and zinc to be minimized. An NPP is designed to control the pH of containment spray and sump coolant using the spray additives 30% NaOH in the event of loss of coolant accident. In this paper, the pH of sump coolant of an NPP during LOCA was analyzed and the fission products removal constant and decontamination factor were calculated according to Standard Review Plan 6.5.2 related to spray chemical conditions of pH. The calculated pH value of recirculation mode using the computer code corresponds to 8.09~9.67, which meets the chemical environment regulation requirements. The fission product removal capability caused by containment spray system is performed to provide input to radiation analysis.

Isolation of Immunomodulatory Antitumor Active Polysaccharide (RGAP) from Red Ginseng By-Product and Its Physico-chemical Properties (홍삼추출잔사로부터 항암면역조절 활성을 보여주는 홍삼산성다당체(RGAP)의 분리 및 이화학적 특성)

  • Kwak, Yi-Seong;Shin, Han-Jae;Song, Yong-Bum;Park, Jong-Dae
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.32 no.5
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    • pp.752-757
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    • 2003
  • This study was carried out in order to develop the method for isolation of red ginseng acidic polysaccharide (RGAP) haying immunomodulating antitumor activity from red ginseng by-product. The red ginseng by-product was obtained from red ginseng residues produced in processing of red ginseng ethanol extract. The yield of RGAP isolated by ultrafiltration was 20.9%. The active substance (GFP) was purified by DEAE-sepharose column chromatography RGAP induced nitric oxide (NO) exhibited tumoricidal activities against P8l5 (mastocytoma) tumor cells. Acid-hydrolyzed RGAP fragments were shown four to five spots. These sopts showed the same R$_{f}$ values with sugars designated as rhamnose, glucose, glactose and glucuronic acid. Some physico-chemical properties of RGAP were investigated. pH and dry reduction content at 105$^{\circ}C$ were 4.74 and 4.72%, respectively. Crude protein, ash and Pb contents were 3.30%, 4.74% and 2.30 ppm. These results suggest that we will be able to produce RGAP from red ginseng by-product by ultrafiltration in a large scale.e.

A study on the relationship between user's preference and aesthetic elements, and the importance of aesthetic elements in product design - With relevance to Electrical Home Appliances - (제품디자인에 있어 사용자 선호와 심미적 영향요소의 상호관계와 디자인 고려 요소에 관한 연구 - 가전제품을 중심으로 -)

  • Jeong, Su-Kyoung;Hong, Jung-Pyo
    • Archives of design research
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    • v.18 no.2 s.60
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    • pp.123-132
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    • 2005
  • In the highly developing industrial society, design has been playing the central role in the managerial strategy of a company and has been one of the central agendas in determining the economical competence of a country, and has also been regarded as a means to acquire sustainable superior competence. Thus, these trends suggest that the aesthetic value of a product has become more important than its technological function. In this study we reviewed theoretically esthetic factors influencing the preference and the evaluation of a product and made a list of eight esthetic factors based on various referential studies which include simplicity, balance, unity, rhythm, style, novelty, typicality, and proportion. We investigated the esthetic factors affecting consumers preferences and the basis for evaluating a product. Conclusively, this study aimed at providing materials for developing product design by presenting an esthetic guideline and to put these materials to practical use. The study also investigated other considered elements classified by manufactures and the importance of esthetic factors and its influence on consumer tastes.

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Pyrrosia lingua Reduces Nociception in Mouse

  • Lim, Hyun Ju;Kwon, Jin;Jeon, Hoon
    • Natural Product Sciences
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    • v.20 no.4
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    • pp.285-289
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    • 2014
  • Pyrrosia lingua has been widely used as a traditional medicine for the treatment of lots of diseases including pain management. However pharmacological and phytochemical studies on its anti-nociceptive properties are extremely limited. In this work, we investigated the effects of methanol extract of Pyrrosia lingua (MPL, 250 and 500 mg/kg) on the both of central and peripheral nociceptive pain. The results from tail-immersion test and hotplate test revealed that MPL has potent anti-nociceptive effects on thermal nociception. In addition, MPL efficiently reduced the acetic acid-induced chemical nociception compared to indomethacin. We also carried out formalin test and MPL reduced formalin-induced pain response on both phases, suggesting MPL has antinociceptive activities on the central and peripheral pain. In combination test using naloxone, anti-nocicpetive activity of MPL was reduced, indicating that MPL acts as a partial opioid receptor agonist. These results suggest that MPL may be possibly used as a valuable natural product-derived painkiller.

Analysis on the Causes and Countermeasures of Sino-US Trade Friction

  • Tan, Dan;Shuai, Xiaoyu
    • Asia-Pacific Journal of Business
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    • v.7 no.2
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    • pp.49-59
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    • 2016
  • The study attempts to investigate the causes of Sino-U.S. trade friction in recent years and provides countermeasures accordingly. The import and export volume of two countries, the product structure of China's export, the 337th Act lawsuits related to China, the industries involved in trade friction, and the G-L Index of Sino-U.S. Products are analyzed in detail. The causes of Sino-US trade frictions are discussed from the aspect of mercantilism and trade protectionism, interest groups and governments' trade policies, Chinese product structure, intellectual property protection in China, and performance of Chinese enterprises in litigation. Based on these, countermeasures are put forward. China needs to implement industrial upgrading, increasing the added value of products, and improving intellectual property protection. A trade friction warning system also needs to be constructed. The Chinese government needs to carry out strategic dialogue and international negotiation.

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Factors Affecting Business Performance: An Empirical Study of the Creative Industry in Semarang, Indonesia

  • HIKMAH, Hikmah;RATNAWATI, Andalan Tri;DARMANTO, Susetyo
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.12
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    • pp.455-463
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    • 2021
  • The creative industry has an important role in economic development, but creative economy entrepreneurs still face many problems in business development and sustaining their businesses. The purpose of the study is to investigate the effect of entrepreneurship orientation, innovative product advantages, and social network quality on business performance to help companies stay competitive. The research uses a quantitative approach with the population being the owner of the creative industry in Semarang City, Central Java, Indonesia. The sampling technique used is convenience sampling, obtained as many as 126 creative industry owners. Data was analyzed using Structural Equation Modeling Partial Least Square (SEM-PLS). The findings of this study show that entrepreneurial orientation, innovative product advantage, and social network quality have a positive effect on the business performance of the creative industry in Semarang City, Central Java, Indonesia. According to the study, a company with superior resources can win the competition and achieve business sustainability. When compared to competing organizations, the benefits of resources and competitive ability will create a competitive edge. As a result, stakeholders such as the government, the corporate sector, and universities are expected to play a larger role in accelerating the growth and development of creative industries.

Peeking Inside The Black-box of Supplier Integration for New Product Development: Salespersons' Coordinating and Regulating Behaviors (신제품 개발을 위한 공급자 통합에 관한 연구: 영업사원의 조정 및 규제 행동의 관점으로)

  • Oh, Jaeyoung
    • Journal of Korean Society for Quality Management
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    • v.50 no.2
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    • pp.221-233
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    • 2022
  • Purpose: This study investigates how the salespersons behave in coordinating the multiple communication channels during supplier integration (SI) for new product development (NPD), especially when their engineers directly collaborate with the buyer. Methods: This study conducted a qualitative study to explore the dynamics of the supplier's salespersons during SI for NPD. With the support of a consumer goods manufacturer (focal firm) in South Korea, we interviewed several managers, including purchasing and engineering, from the focal firm and salespersons from eight tier-1 suppliers of the focal firm. Results: The results found that the supplier's salespersons show two different behaviors toward managing and controlling the collaboration between their engineers and the buyer: (1) Process regulating behaviors that control the flows of information or communication between the engineers and the buyer, and (2) knowledge regulating behaviors that directly and indirectly support the engineers to be equipped with accurate and complete knowledge so that they can share the right knowledge with the buyer. Conclusion: This study contributes to academia and practitioners as follows. To academia, this study fill the gap in the literature by introducing the distinct behaviors of the supplier's salesperson in SI for NPD. To practitioner, in addition, our findings present coordination mechanisms to manage and control multiple communications within an inter-organizational collaboration.