• Advances in concrete construction
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• 제16권1호
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• pp.69-78
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• 2023

This investigation delves into the adverse repercussions stemming from the impact of arsenic on steel pipes concealed within soil designated for rice cultivation. Simultaneously, the study aims to ascertain effective techniques for detecting arsenic in the soil and to provide strategies for mitigating the corrosion of steel pipes. The realm of nanotechnology presents promising avenues for addressing the intricate intersection of renewable energy, oil, and environmental pollution from a novel perspective. Nanostructured materials, characterized by distinct chemical and physical attributes, unveil novel pathways for pioneering materials that exert a substantial impact across diverse realms of food production, storage, packaging, and quality control. Within the scope of the food industry, the scope of nanotechnology encompasses processes, storage methodologies, packaging paradigms, and safeguards to ensure the safety of consumables. Of particular note, silver nanoparticles, in addition to their commendable antibacterial efficacy, boast anti-fungal and anti-inflammatory prowess, environmental compatibility, minimal irritability and allergenicity, resilience to microbial antagonism, thermal stability, and robustness. Confronting the pressing issue of arsenic contamination within both environmental settings and the food supply is of paramount importance to preserve public health and ecological equilibrium. In response, this study introduces detection kits predicated upon silver nanoparticles, providing an expeditious and economically feasible avenue for identifying arsenic concentrations ranging from 0.5 to 3 ppm within rice. Subsequent quantification employs Hydride Atomic Absorption Spectroscopy (HG-AAS), which features a detection threshold of 0.05 ㎍/l. A salient advantage inherent in the HG-AAS methodology lies in its capacity to segregate analytes from the sample matrix, thereby significantly reducing instances of spectral interference. Importantly, the presence of arsenic in the soil beneath rice cultivation establishes a causative link to steel pipe corrosion, with potential consequences extending to food contamination-an intricate facet embedded within the broader tapestry of renewable energy, oil, and environmental pollution.

• 한국IT서비스학회지
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• 제15권3호
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• pp.71-95
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• 2016

In recent years, text mining has been used to extract meaningful insights from the large volume of unstructured text data sets of various domains. As one of the most representative text mining applications, topic modeling has been widely used to extract main topics in the form of a set of keywords extracted from a large collection of documents. In general, topic modeling is performed according to the weighted frequency of words in a document corpus. However, general topic modeling cannot discover the relation between documents if the documents share only a few terms, although the documents are in fact strongly related from a particular perspective. For instance, a document about "sexual offense" and another document about "silver industry for aged persons" might not be classified into the same topic because they may not share many key terms. However, these two documents can be strongly related from the R&D perspective because some technologies, such as "RF Tag," "CCTV," and "Heart Rate Sensor," are core components of both "sexual offense" and "silver industry." Thus, in this study, we attempted to discover the differences between the results of general topic modeling and R&D perspective topic modeling. Furthermore, we package social issues from the R&D perspective and present a prototype system, which provides a package of news articles for each R&D issue. Finally, we analyze the quality of R&D perspective topic modeling and provide the results of inter- and intra-topic analysis.

• 한국염색가공학회:학술대회논문집
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• 한국염색가공학회 2011년도 제44차 학술발표회
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• pp.86-86
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• 2011

나노소재기술은 기존 소재로는 얻을 수 없는 새로운 기능 및 특성을 나타낼 수 있어 산업전반에 적용할 수 있는 최첨단집적기술이다. 그러나 나노입자를 섬유에 첨가하여 기능성 섬유를 생산하는 경우 응집이 발생하는 등의 다양한 문제점이 발생하는데 이를 극복하기 위해서는 사이즈 분포를 제어하는 기술, 표면처리를 통해 분산성을 향상시키는 기술, 나노입자와 섬유와의 상용성을 개선하는 기술 등이 해결되어야 한다. 본 연구에서는 고기능성 및 고부가가치 경편파일 니트 원단을 개발하기 위해 은(Silver) 나노입자가 균일하게 분산된 M/B(Master Batch)를 제조하였으며, 이를 PET와의 용융 혼합 방사함으로써 0.5denier(75D/144F)급 원사에 99.9%의 영구적인 항균/소취 기능을 부여하였다. 또한 개발된 극세사를 이용하여 다양한 경편파일 원단을 설계하고, 기모, 염색 및 날염 등의 공정을 거쳐 나노기술융합형 화학섬유소재를 이용한 기능성 침장 제품을 개발하였다.

• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.251-257
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• 2020

The study investigates the role of commodity prices and tax purpose recognition on bitcoin prices. Since the introduction of bitcoin in 2008, emphasis has focused on economists, policy-makers and analysts drastically increasing bitcoin's accessibility and commodity values (Dumitrescu & Firică, 2014). This study employs GARCH and EGARCH from ARCH/GARCH family on daily nature data. We measure the volatile behavior of bitcoin by employing auto-regressive conditional heteroscedasticity model with the aim to explore the relationship between major commodities and bitcoin volatility. We focus on major commodities like gold, silver, platinum, and crude oil to be regressed with bitcoin. The daily prices of commodities were retrieved from www.investing.com and bitcoin prices from www.coindesk.com for the period from 29April 2013 to 16 October 2018. Results confirmed the currency's long-term volatile behavior, which is due to its composition and market dynamics, whereas the existence of asymmetric information effect is not confirmed. Tax recognition by other countries may in future help in controlling the volatility as bitcoin is not a country-specific security. But, only silver impacts on volatility in comparison to oil prices and platinum, which is due to its similar features with gold. Eventually, bitcoin can be used for risk diversification and money making.

• 유통과학연구
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• 제16권9호
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• pp.5-11
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• 2018

Purpose - In recent, Japanese retailers have expanded their business into Korea, although Korean customers have anti-Japan sentiment in their mind, It is, thus, necessary to investigate how Korean customers react to Japanese retailers, when selecting a shopping place. Research design, data, and methodology - The authors have developed a research model with five hypotheses, based on the literature review process, and used confirmative factor analysis(CFA) as well as a structural equation model(SEM) as a research technique, in order to verify hypotheses. Results - All of hypotheses are accepted. Anti-Japan sentiment significantly influences consumer ethnocentrism and animosity. Interestingly, consumer ethnocentricity affects the formation process of animosity. Rather than ethnocentrism, animosity relatively influences customer attitudes towards Japanese retailers, when Korean customers choose a retailer. Conclusions - The authors found that anti-Japan sentiment has significantly affected Korean customer attitudes. In order for Japanese retailers to increase their market shares in the Korean market, they have to make a significant effort to alleviate the degree of anti-Japan sentiment, together with Japanese government. In contrast with research findings, Japanese retailers have done their business very well in Korea. Considering that Japanese retailers target younger customers in Korea, demographic elements should be involved in the future research.

• 디지털융복합연구
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• 제19권9호
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• pp.145-156
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• 2021

기존 경영학 문헌에서 기업집단은 개발도상국, 재무시장이 발달하지 못한 국가에서 일시적으로 존재하는 기업의 형태라고 여겨졌다. 그러나 기업집단의 한국적 형태인 재벌은, 대한민국이 선진국으로 거듭나고 국내 재무시장이 발달하였음에도 불구하고, 여전히 주요한 기업의 형태로 존속하고 있다. 본 이론 연구에서는 이러한 기존 이론과 현상의 불일치를 규명하기 위해, 재벌가 출신 창업가에 대한 이론적 연구 모형을 제시한다. 첫째, 본 연구에서는 사회적, 기업지배 구조적, 재벌가 구성원 본인들의 심리적 요인들은 재벌가 구성원들이 창업가로 거듭나는 긍정적 동기로 작용함을 제안한다. 둘째, 이들이 운영하는 기업은 더 나은 기회 포착, 재무적 지원, 원활한 채용, 활발한 마케팅 및 기업간 협력 관계 구축을 통해 여타의 창업가들보다 더 빠른 성장을 달성할 것임을 주장한다. 본 이론 논문은 대한민국 재벌가 출신의 창업을 통한 재벌 집단의 새로운 확장 가능성을 제시함으로써 기업집단 및 창업 연구의 발전에 기여하고자 한다.

• 패션비즈니스
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• 제20권3호
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• pp.1-16
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• 2016

The purpose of this study is to analyze the differences in color, pattern, and texture of functional materials of outdoor clothing according to new senior women's psychological comfort. The data were collected from 163 female respondents aged 55-64 living in Busan. The results of the study are as follows. First, both the high and low psychological comfort groups preferred soft material the most. The high psychological comfort group particularly preferred soft textures and highly evaluated textured material in general. Second, both groups mostly preferred plain patterns while the high psychological comfort group preferred the dot pattern more. Third, in terms of colors, the high psychological comfort group preferred navy and purple, while the low psychological comfort group preferred brown. As to achromatic colors, both groups preferred black the most with the high psychological comfort group preferred gray and white more than the other group. Fourth, the high psychological comfort group preferred colors and patterns of clothing that made one look the most slimming, while the low psychological comfort group strongly preferred colors and patterns of clothes. Therefore, our results suggest that new senior women have a strong interest in outdoor clothing, not only in terms of textile functions, but also having interest in textile designs. In particular, the new silver women value psychological comfort in colors more than patterns of textile design.

• 패션비즈니스
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• 제20권3호
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• pp.68-88
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• 2016

The purpose of this research is to investigate the characteristics of Chinese minority women's waistbands, in view of their lifestyle, costume, and symbolism. The research method combined literature research and case study. In the case study, this research targeted the secondary data of a total of 215 pieces from books, articles and the internet. A total of 5 pieces per each representative women's waistband of 43 minorities, excluding those who did not wear a waistband, we collected. We then quantitatively analyzed the form and decoration of the waistbands. As a result of considering the form, the waistbands of Chinese minorities per region were closely related to the costumes, mainly showing high similarity in respect to color and decoration. Moreover, the decorations of the waistbands were most often made from their own area's special products, such as silver, bronze, cotton, and linen, amongst other. The form and decoration of the Chinese minority women's waistbands were all connected with functionality, aesthetic impression, and symbolism, which can be said to be an important part of understanding Chinese minority costume culture. This research contributes to the development and preservation of Chinese minorities' costume culture by considering and analyzing unique costume factors besides giving excellent fashion design ideas for contemporary fashion.

• 한국경영과학회지
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• 제38권4호
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• pp.11-33
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• 2013

We analyzed the structures and properties of the global financial market networks using social network analysis approach. The Minimum Spanning Tree (MST) lengths and networks of the global financial markets based on the correlation coefficients have been analyzed. Firstly, similar to the previous studies on the global stock indices using MST length, the diversification effects in the global multi-asset portfolio can disappear during the crisis as the correlations among the asset class and within the asset class increase due to the system risks. Second, through the network visualization, we found the clustering of the asset class in the global financial markets network, which confirms the possible diversification effect in the global multi-asset portfolio. Meanwhile, we found the changes in the structure of the network during the crisis. For the last one, in terms of the degree centrality, the stock indices were the most influential to other assets in the global financial markets network, while in terms of the betweenness centrality, Gold, Silver and AUD. In the practical perspective, we propose the methods such as MST length and network visualization to monitor the change of the correlation risk for the risk management of the multi-asset portfolio.

• 패션비즈니스
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• 제5권1호
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• pp.73-85
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• 2001

The purpose of this study is to understand what the Glam Style is, focus on the movie "Velvet Goldmine". The Glam Style is refered early 1970s Glam rockers' costume, typified by silver lurex, corksoled platform, men in make-up, personified, for example, by David Bowie, Marc Bolan, New York Dolls, Roxy Music and Iggy Pop. To approach the Glam Style comprehensively, I have divided the formative background of Glam Style into the improvement technology, the advent of the young generation and the diffusion of mass media, the rock music fever and influence on Pop art. Following is the result of analyzing of the character in the movie. First, Brian Slade has the flamboyant transsexual image by skin-tight space suit, glitter pants, lurex, satin and sequined stretch fabrics, vivid color, gauze make-up, feather boa. Second, Curt Wild expresses the outrageous sexual image by black leather jacket, emphasized black eyes make-up. Third, Mandy Slade appears the exaggerated and frivolous image by gold leopard patterned one piece, fur coat, ornamented with beads, tropical make-up, spangles and the costume jewelry. Forth, Auther Stuart has the complex image by black leather jacket, velvet jacket, skin-tight bold shirt, glitter pants, glitter make-up, silk scarf, cherry-red sunglasses. The characteristics meaning of Glam Style implied in this formative characteristic could be presented as the experimental expression of androgynous, the hordes of outrageous alien and kitsch parody.