• 한국진공학회:학술대회논문집
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• 한국진공학회 1996년도 제11회 학술발표회 논문개요집
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• pp.94-95
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• 1996

• 한국의류산업학회지
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• 제20권3호
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• pp.293-303
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• 2018

Since 2009, consumers could access a new shopping channel called 'mobile shopping' with the generalization of smartphones. Mobile shopping (based on wireless communication technology), emphasizes convenience differentiated from internet shopping. A recent report introduced fashion products as powerful global drivers for mobile shopping sales. Korea and China have the highest percentage of consumer mobile shopping experiences compared to other countries. This study investigates the effects of cross-over shopping orientation, perception of app attributes, and flow on app loyalty that compared Korean and Chinese consumers. We obtained 652 usable questionnaires from two local college students; subsequently, data were analyzed by using factor analysis, Cronbach's alpha, and regression analysis using SPSS 21.0 Package. The study results showed that the cross-over shopping orientation affected perception of app attributes that included Review/Information, Design, Response and Product. Product only affected Flow, which reflected a high similarity between Korean and Chinese consumers. However, Korean and Chinese consumers showed remarkable differences in the factors related to app loyalty. Therefore, the results indicate that retailers of fashion products have developed strategies to improve mobile sales and increase the app loyalty of cross-over shopping orientation consumers.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권6호
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• pp.2251-2270
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• 2015

More than 1 billion mobile apps (smartphone applications) have been released worldwide. Competition among developers of apps that are available in app stores has intensified because of increasing demand. App icons with an appealing design can instantly increase attention. Miryoku Engineering methods were used and combined with the Kansei interface model to examine the relationship between attractive icons and users. The evaluation grid method (EGM) is a qualitative method that was used to evaluate the icons, and Quantification Theory Type I is a quantitative method that was used to analyze the influence of design elements in icons. Eight attractive factors of app icons were determined using EGM, and six specific factors were identified using questionnaires. The quantitative results indicated that user cognition and emotion were influenced by the various design elements. The impact on the attractive factors of a single design element differed among users with diverse backgrounds. App icons were assessed on the basis of aesthetics to identify attractive factors and thereby assist designers in understanding and implementing design elements and improving the overall visual appeal of their apps. The result of this investigation is crucial to the presentation of app icons in online app stores.

• Journal of Microbiology and Biotechnology
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• 제15권3호
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• pp.466-471
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• 2005

An Escherichia coli strain with high phytase activity was screened from pig excreta. The phytase gene, appA, was amplified by PCR technique. To obtain large amounts of appA phytase, the appA gene was subcloned into the baculovirus transfer vector pVL1393 under the control of the Polyhedrin promoter. The recombinant baculovirus harboring the appA gene was obtained after co-transfection and screening. The early $5^{th}$ instar larvae of silkworm were infected with the recombinant virus. Using this system, the appA phytase was overproduced up to 7,710 U per ml hemolymph. SDS-PAGE analysis revealed the baculovirus-derived appA phytase to be approximately 47 kDa in size. The optimal temperature and pH of the expressed phytase were $60^{\circ}C$ and pH 4.5, respectively. The enzymatic activity was increased by the presence of 1 mM $Ca^{2+}$, 1 mM $Mn^{2+}$, or $0.02\%$ Triton X-100.

• 컴퓨터교육학회논문지
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• 제14권5호
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• pp.29-37
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• 2011

SCAMPER 기법은 사물이나 대상을 새롭게 변형, 보완하기 위한 아이디어를 생산하는데 효과적인 창의성 신장 방법이다. 본 논문에서는 SCAMPER 기법을 제공하는 스마트폰 앱을 설계 구현하고 스마트폰 사용자를 대상으로 시연과 실습을 통해 개발한 스마트폰 앱의 효용성과 단점 및 개선사항에 대하여 조사하였다. 그 결과, 개발한 스마트폰 앱은 가치 및 활용, 내용 및 구성 면에서 효과적이었으며, 시공간에 구애받지 않고 사용 가능하였다. 또한 아이디어를 쉽게 작성, 저장하고, 공유함으로써 양방향 상호작용에 효과적인 것으로 나타났다. 평가에서는 향후 스마트폰 사용자들이 SCMAPER 기법을 앱을 통해 효율적으로 창의성을 신장시키고 계발할 수 있는 도구로 제공될 수 있도록 개선사항들이 제언되었다.

• Biomolecules & Therapeutics
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• 제27권3호
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• pp.276-282
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• 2019

${\beta}$-amyloid precursor protein (APP) can be cleaved by ${\alpha}$-, and ${\gamma}$-secretase at plasma membrane producing soluble ectodomain fragment ($sAPP{\alpha}$). Alternatively, following endocytosis, APP is cleaved by ${\beta}$-, and ${\gamma}$-secretase at early endosomes generating ${\beta}$-amyloid ($A{\beta}$), the main culprit in Alzheimer's disease (AD). Thus, APP endocytosis is critical for $A{\beta}$ production. Recently, we reported that Monsonia angustifolia, the indigenous vegetables consumed in Tanzania, improved cognitive function and decreased $A{\beta}$ production. In this study, we examined the underlying mechanism of justicidin A, the active compound of M. angustifolia, on $A{\beta}$ production. We found that justicidin A reduced endocytosis of APP, increasing $sAPP{\alpha}$ level, while decreasing $A{\beta}$ level in HeLa cells overexpressing human APP with the Swedish mutation. The effect of justicidin A on $A{\beta}$ production was blocked by endocytosis inhibitors, indicating that the decreased APP endocytosis by justicidin A is the underlying mechanism. Thus, justicidin A, the active compound of M. angustifolia, may be a novel agent for AD treatment.

• Fisheries and Aquatic Sciences
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• 제21권12호
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• pp.38.1-38.9
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• 2018

Alzheimer's disease (AD) is a disturbing and advanced neurodegenerative disease and is characterized pathologically by the accumulation of amyloid beta ($A{\beta}$) and the hyperphosphorylation of tau proteins in the brain. The deposition of $A{\beta}$ aggregates triggers synaptic dysfunction, and neurodegeneration, which lead to cognitive disorders. Here, we found that FF isolated from an eatable perennial brown seaweed E.bicyclis protect against $A{\beta}$-induced neurotoxicity in neuroblastoma cells stably transfected with two amyloid precursor protein (APP) constructs: the APP695 cDNA (SH-SY5Y-APP695swe). The FF demonstrated strong inhibitory activity for ${\beta}$-secretase ($IC_{50}$ $16.1{\mu}M$) and its inhibition pattern was investigated using Lineweaver-Burk and Dixon plots, and found to be non-competitive. Then, we tested whether FF could inhibit production of $A{\beta}$ in SH-SY5Y-APP695swe. FF inhibited the production of $A{\beta}$ and soluble-APP, residue of APP from cleaved APP by ${\beta}$-secretase. Our data show that FF can inhibit the production of $A{\beta}$ and soluble-$APP{\beta}$ via inhibition of ${\beta}$-secretase activity. Taken together these results suggest that FF may be worthy of future study as an anti-AD treatment.

• 유통과학연구
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• 제20권8호
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• pp.105-114
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• 2022

Purpose: The technology acceptance model (TAM) refers to a theory that maps the possibility or extent to which users can accept an innovative technology. The purpose of the current research is to investigate the mediating effect of TAM between online review and behavior intention for promoting golf app's distribution. Research design, data and methodology: In order to examine the relationship between app usage reviews, TAM, and behavioral intentions of golf app participants, the present author collected total 170 responses from South Korean participants based on web-based survey system. The main methodology which was selected by this study is mediation causality analysis that Baron and Kenny suggested. Results: The statistical findings definitely indicated that TAM mediating role exists between the positive emotion of golf app users regarding online reviews and positive behavior intention of golf app, which means that all three steps of mediation causality analysis were statistically significant. Conclusions: The present research concludes that the correct utilization of innovation in the design and implementation of the technology features translates into performance excellence. The model can be used to increase the online presence through innovation as a primary drive toward providing more convenience and accessibility to the users through mobile golf apps.

• International Journal of Computer Science & Network Security
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• 제24권2호
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• pp.143-149
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• 2024

The role of social networking mobile applications such as WhatsApp in enhancing second language vocabulary learning among English language learners continues to be a subject of interest for many scholars. The current study aimed at examining medical English vocabulary learning among undergraduate students using WhatsApp compared to learning vocabulary via the Blackboard platform during the Covid-19 pandemic. To this end, 108 medical students (51 males, 57 females) enrolled in a first semester English for a specific English course participated in the study. A quasi-experimental design was adopted for two groups. Fifty-three students participated in the WhatsApp group and 55 students formed the Blackboard group. A pretest-posttest design was employed to collect data. Results of t-test scores did not show a significant difference between the WhatsApp and Blackboard groups on a vocabulary test. Results of a survey that measured students' opinion of the use of WhatsApp as a platform for learning new vocabulary showed positive perceptions since participants thought that WhatsApp enhanced their learning experience.

• 컴퓨터교육학회논문지
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• 제17권5호
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• pp.79-88
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• 2014

앱 인벤터는 프로그래밍의 결과물이 실제 기기에서 동작한다는 장점 때문에 프로그래밍 교육 도구로 사용되고 있다. 하지만 아직까지 초 중등 교육에서 앱 인벤터의 프로그래밍 교육 활용에 대한 장점과 단점에 대한 연구가 부족하고, 효과적인 교육 방안에 대한 논의가 활발히 이루어지고 있지 않다. 본 연구는 효과적인 초 중등 앱 인벤터 교육 방안을 마련하기 위하여 앱 인벤터를 학습한 교사와 학생의 반응을 분석하여 앱 인벤터 교육 방안 설계시에 고려해야 할 내용을 도출하였다. 연구 결과 프로그래밍 교육 도구로서 앱 인벤터는 실제적인 경험을 주고, 학습자가 쉽게 접근할 수 있는 장점이 있었다. 학습자가 앱 인벤터 학습을 위한 사전 지식이 필요하다는 점과 기기를 사용하는 방법을 적절히 계획해야 한다는 점이 단점으로 꼽혔다. 이러한 앱 인벤터의 장점과 단점을 고려하여 초 중등 학습자에게 앱 인벤터를 활용한 프로그래밍 교육 방안을 제시하였다.