• 한국수학사학회지
• /
• 제22권4호
• /
• pp.145-160
• /
• 2009

20세기말 p-진 공간에서 p-진 q-적분의 개념이 김태균에 의해서 처음 도입 되었다([11]). 이러한 적분은 복소수 공간에서 잭슨의 q-적분을 p-진 공간으로 확장 시킨 것이며 또한 울트라 비 아르키메디언 적분의 존재성에 대한 질문의 답으로 볼 수 있다. 본 논문에서는 이러한 p-진 q-적분의 수학사적 배경을 살펴보고, 현재 어떠한 방향으로 연구가 진행되고 있는지를 고찰한다.

• Natural Product Sciences
• /
• 제17권3호
• /
• pp.245-249
• /
• 2011

Eight compounds, squalene (1), friedelin (2), ${\beta}$-sitosterol (3), ${\beta}$-sitosterol-3-O-glucoside (4), ${\alpha}$-tocopherol (5), betulinic acid (6), trilinolein (7) and 1-O-(9Z,12Z-Octadecadienoyl)-3-nonadecanoyl glycerol (8), were isolated from the barks of Tilia amurensis. Their chemical structures were identified by comparing their physicochemical and spectral data with those published in the literature. These isolated compounds were examined for their inhibitory activities against topoisomerase I and II. Compound 7 showed significant inhibition of DNA topoisomerase I and II activities, with percent decreases in activity of 87 and 95%, respectively at a concentration of $100\;{\mu}M$. Compound 6 exhibited cytotoxicity against the human colon adenocarcinoma cell line (HT-29), the human breast adenocarcinoma cell line (MCF-7) and the human liver hepatoblastoma cell line (HepG-2), with $IC_{50}$ values of 20, 59 and $16\;{\mu}M$, respectively.

• 유통과학연구
• /
• 제19권6호
• /
• pp.51-64
• /
• 2021

Purpose: A restaurant is a business of the physical distribution of food and beverages which includes intercultural interaction. This research paper aims to examine the influence of Japanese taste as a product advantage, determining service quality factor in the restaurant business, the e-CRM that involves technology, social media campaigns to reach the target market of young people, and customer satisfaction on customer loyalty in Sushi Tei restaurant. This study also intends to find direct and indirect influence between the variables. Research design, data and methodology: Quantitative research was conducted using a survey method by distributing 100 questionnaires to Sushi Tei customers in Jakarta, consisting of Gen Z and Millennials. Samples were taken at each outlet in the Jakarta area on weekend and weekdays by purposive sampling. Data was generated by path analysis Results: The results showed that Japanese taste, service quality, and e-CRM significantly influence customer satisfaction and customer loyalty. However, social media campaigns failed to influence customer loyalty. As a result, customer satisfaction has a significant influence on customer loyalty within Sushi Tei restaurant. Conclusion: The study also proposed significant implications to develop and maintain a relationship with the customer to gain satisfaction and loyalty in the food and beverage industry.

• 식품보건융합연구
• /
• 제10권4호
• /
• pp.1-8
• /
• 2024

This study investigates the impact of servicescape elements in franchise fast food restaurants on the attitudes and revisit intentions of Generation MZ. Employing a mixed-methods approach, we surveyed 231 MZ consumers across five major urban centers. Our findings reveal that ambient conditions, spatial layout, and technology integration significantly influence MZ consumers' perceptions and behaviors. Specifically, sustainability-oriented design, customizable spaces, and seamless digital integration emerged as key drivers of positive attitudes and increased revisit intentions. Furthermore, we identify important generational differences, with Gen Z placing higher importance on Instagram-worthy aesthetics and contactless service options compared to Millennials. This research contributes to servicescape theory by proposing a novel framework tailored to MZ consumers in the fast food context. It offers practical implications for franchise operators seeking to attract and retain this crucial demographic. Our study highlights the evolving preferences of younger consumers and underscores the need for adaptable servicescape strategies in the fast food industry. The results suggest that franchises investing in environmentally conscious designs, flexible spaces, and cutting-edge technology are likely to see improved customer satisfaction and loyalty among MZ consumers. Future research could explore the long-term effects of these servicescape elements on brand perception and market share within the competitive fast food landscape.

• 문화기술의 융합
• /
• 제10권5호
• /
• pp.445-452
• /
• 2024

팬데믹을 거치며 음식배달시장 고도화에 따른 외식문화의 지형도가 급변하고 있다. 최근 쿠팡이츠가 요기요를 제치고 2위로 도약하면서 경쟁이 심화되고 있으며, 업계 1위 배달의민족(배민) 역시 구독제 도입을 준비 중이다. 시장의 성장세가 주춤한 가운데, 배달비와 음식가격 상승으로 인해 포장과 픽업 서비스 이용률이 높아지고 있다. 요컨대 젊은 세대가 앱 서비스를 활발히 사용하는데 영향을 미치는 요인으로 유용성 및 사용편의성, 비용민감성, 쾌락적 동기가 중요함이 선행연구를 통해 밝혀졌다. 실제로 최근 Z세대의 경우, 구독제 선택 대신 '징검다리형 소비'와 배달팟 과정을 거쳐 지출을 최소화하는 트렌드를 주도하고 있다. 이에 Z세대의 특성을 반영한 신규 배달앱의 기능개선과 활성화 방안을 제안함으로써 고객들에게 더 나은 경험을 선사하여 경쟁력 강화를 돕고자 한다. 전문가 델파이 조사결과, 누적할인 바로보기, 가족혜택 추가, 쿠폰강화 기능, SNS홍보, 픽업산책, 매장 내 홍보, 할인율 진열의 순서대로 영향도 평가점수를 받아 실무에 적용 검토할 것이다. 푸드테크 시장에 관한 학술적, 정책적 시사점을 함께 제시한다.

• Journal of Microbiology and Biotechnology
• /
• 제13권6호
• /
• pp.976-983
• /
• 2003

Seven Escherichia coli cells defective with aerobic growth were isolated by the insertion of ${\lambda}placMu53$, a hybrid bacteriophage of ${\lambda}$ and Mu, which created a transcriptional fusion to lacZY. These insertion mutant cells were tested on an XG ($5-bromo-4-chloro-3-indolyl-{\beta}-D-galactopyranoside$) medium for anaerobic expression of lacZ by fusion to a promoter. The chromosomal DNA from these strains were digested by EcoRI, and the EcoRI fragments that contained the fused gene and lacZ sequence were identified by Southern hybridization, using lacZ containing plasmid as a probe. The EcoRI fragment from each strain was cloned and sequenced. The sequence data were compared with the GenBank database. The mutated gene of three strains, CYT4, CYT5, and OS11, was found to be identical, and it was nrdAB that encoded ribonucleoside diphosphate reductase. The gene nrdAB was at min 50.5 on the Escherichia coli linkage map and 2,348,084 on the physical map, and is involved in hemAe-related reduction-oxidation reaction. OS6 and OS14 mutant strains had insertion at min 8.3 and the mutated gene was hemB. The hemB encodes 5-aminolevulinate dehydratase or porphobilinogen synthase. The OS3 mutant had insertion in cydB at min 16.6. The cydAB encodes cytochrome d oxidase. In the case of OS1, the fusion was made with sucA, the E1 component of ${\alpha}-ketoglutarate$ dehydrogenase.

• 한국독어학회지:독어학
• /
• 제5집
• /
• pp.375-398
• /
• 2002

Um von der 'kritischen' Situation des Faches DaF rauszukommen, werden viele Versuche untemommen, durch die Verbesserung des Untenichts in der Richtung nach der Entwicklung der kommunikativen $F\"{a}higkeit$ Deutsch als Fremdsprache wieder attraktiv und $konkurrenzf\"{a}hig$ zu machen. Aber leider sieht die Zwischenbilanz nicht so erfolgreich aus. Eine der Ursachen $daf\"{u}r\;l\"{a}sst$ sich mE. darin sehen, dass die $Ans\"{a}tze,\;die\;haupts\"{a}chlich\;f\"{u}r$ den Unterricht von Deutsch als Zweitsprache entwickelt wurden, ohne $gen\"{u}gende$ Berucksichtigung auf die kulturellen und institutionellen Unterschiede zwischen den Lemsituationen im zielsprachigen Land und im Heimatland der Schuler eingesetzt werden. In diesem Kontext $w\"{a}re\;es\;n\"{o}tig$, auf die Unterschiede zwischen DaF und DaZ und ihre Wirkung auf die Lehrstrategien im DaF-Unterricht zuruckzugreifen, Dabei sind auf einige Faktoren besonders zu achten, die DaF-Untenicht vom DaZ-Untenicht unterscheiden: die Mangel an den $M\"{o}glichkeiten$ der authentischen Kommunikation, die $Homogenit\"{a}t\;der\;Sch\"{u}ler$, die Lemkultur in der schlulischen Institution, das Alter, in dem die Sch\"{u}ler$ mit dem Lemen der Zielsprache beginnen. Daraus lassen sich die folgenden unterrichtlichen Konsequenzen ergeben: Die Lehrer sollten sich bemtihen, den $Sch\"{u}lern\;die\;M\"{o}glichkeiten\;f\"{u}r$ die authentischen Kommunikation besorgen, besonders $au{\ss}erhaib$ des Unterrichts, z.B. durch das Chatting- Projekt, $w\"{a}hrend$ im Unterricht mehr $Anl\"{a}sse\;f\"{u}r$ die Reflexion gegeben sollten. Und dabei sollten die unterrichtlichen Vorteile-die gemeinsame Muttersprache und Kultur, das Alter usw. - aktiv benutzt werden. Die meisten Koreaner beginnen $n\"{a}mlich$ mit dem Lernen der zweiten Fremdsprache erst in oder nach der $Pubert\"{a}t$. In diesem Zusammenhang sollte es auch betont werden, dass sich die Autonomie der Lerner durch den Unterricht richtig entwickelt, damit sie $sp\"{a}ter$ ihre Fertigkeiten autonom entwickeln $k\"{o}nnen$.

• 한국의류산업학회지
• /
• 제25권6호
• /
• pp.690-703
• /
• 2023

With the emergence of digitalization and environmental changes, such as those caused by COVID-19 and high-speed networks, online video platforms have changed how people communicate and created new marketing opportunities. The unique characteristics of mobile short-form videos are causing more people to consume and produce diverse content in the digital environment. The study focuses on two story types (product essential and relative information) to examine the effectiveness of short-form videos for fashion marketing. This study verified the influence of the common traits of short-form video content (informativeness, expertise, familiarity, and playfulness) on fun, e-WOM, and purchase intention and the mediation effect of fun using video samples categorized by story type. In this study, 300 Gen Z men and women responded to a survey after watching a 30-second short-form video sample. All the traits of short-form video content were found to have a positive effect on fun. Moreover, all the traits excluding playfulness had a positive effect on e-WOM and purchase intention as well. Fun had a positive effect on both e-WOM and purchase intention as well as a partial mediating effect. These findings are expected to provide insight and reference for planning short-form video marketing from the perspective of the fashion industry.

• The Journal of Advanced Prosthodontics
• /
• 제13권6호
• /
• pp.343-350
• /
• 2021

PURPOSE. The success of an implant-prosthetic rehabilitation is influenced by good implant health and an excellent implant-prosthetic coupling. The stability of implant-prosthetic connection is influenced by the rotational tolerance between anti-rotational features on the implant and those on the prosthetic component. The aim of this study is to investigate the rotational tolerance of a conical connection implant system and its titanium abutment counterpart, in various conditions. MATERIAL AND METHODS. 10 preparable titanium abutments, having zero-degree angulation (MegaGen, Daegu, Korea) with an internal 5-degree conical connection, and 10 implants (MegaGen, Daegu, Korea) were used. Rotational tolerance between the connection of implant and titanium abutments was measured through the use of a tridimensional optics measuring system (Quick Scope QS250Z, Mitutoyo, Kawasaki, Japan) in the as-received condition (Time 0), after securing with a titanium screw tightening at 35 Ncm (Time 1), after tightening 4 times at 35 Ncm (Time 2), after tightening one more time at 45 Ncm (Time 3), and after tightening another 4 times at 45 Ncm (Time 4). RESULTS. The group "Time 0" had the lowest values of rotational freedom (0.22 ± 0.76 degrees), followed by the group Time 1 (0.46 ± 0.83 degrees), the group Time 2 (1.01 ± 0.20 degrees), the group Time 3 (1.30 ± 0.85 degrees), and the group Time 4 (1.49 ± 0.17 degrees). CONCLUSION. The rotational tolerance of a conical connection is low in the "as received" condition but increases with repetitive tightening and with application of a torque greater than 35 Ncm.

• 한국의류산업학회지
• /
• 제24권6호
• /
• pp.719-730
• /
• 2022

This study explored the impact of beauty influencers' characteristics and product characteristics on new product acceptance intentions and studied the mediating effects of consumer trust in this process. A survey was conducted from February 22, 2021, to February 28, 2021, with Gen Y and Gen Z women in China, and 379 questionnaires were analyzed. The conclusions are as follows: First, the characteristics of beauty influencers are authenticity and expertise, similarity, attractiveness, interactivity, familiarity, and trustworthiness; product characteristics are cost, image, product quality, product perception, sales promotion, and sustainability. Second, partial beauty influencers' characteristics and partial product characteristics have a positive impact on consumer confidence and acceptance intention of the new product. Third, the mediating effect of consumer trust in the process by which beauty influencers' characteristics and product characteristics influence the intention of new product acceptance was determined. Therefore, when beauty companies use influencers in marketing, it is necessary to understand their characteristics, consider their professionality and authenticity, examine their reliability, and assess their ability to form connections with images and viewers that match their products. Additionally, to increase the acceptance intention of new products, companies should present the price of high-quality products, product sensibilities, and corporate images of products and establish measures that can positively affect consumers' acceptance intention of new products by combining them with the characteristics of beauty influencers.