• 말소리와 음성과학
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• 제9권2호
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• pp.69-76
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• 2017

The current study investigated whether Korean learners' English-learning environments, especially target English accent (General American English (GAE) vs. Southern British English (SBE)) and English-language experience affected their production of English vowels. Thirty six EFL learners, 27 ESL-US learners, and 33 ESL-UK learners produced 8 English vowels with a bVt frame (beat, bit, bet, bat, bought, bot, boat, boot). The learners' productions were acoustically analyzed in terms of F1 and F2 frequencies. The overall results revealed that the learners' target accent had an effect on their production of some English vowels. The EFL and ESL-US learners' (especially, female learners') production of bought, bot, boat, and boot, which show characteristic differences between the GAE and SBE accents, was closer to that of the native American English (AE) speakers than the native British English (BE) speakers. In contrast, the ESL-UK learners' production of bought and bot demonstrated the opposite pattern. Thus, the impact of target accent was not demonstrated across the board. The effect of the learners' different English-language experience was also rather limited. This was because the EFL learners' production was not much different from the ESL-US learners' production, in spite of the ESL-US learners' residence in the US for more than 9 years. Furthermore, the Korean learners, irrespective of their different English-language experience, tended to produce bit and bat with lower F1 than the native AE and BE speakers, thus resulting in bit and bat to be produced similarly to beat and bet, respectively. This demonstrates the learners' persistent L1 effects on their English vowel production despite the learners' residence in the English speaking countries or their high English proficiency.

• 대한간호학회지
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• 제52권4호
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• pp.464-475
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• 2022

Purpose: This study aimed to identify the mediating effects of depression amid the influence of fear and social distancing arising from Coronavirus disease 2019 (COVID-19) in Korean women's suicidal ideation. Methods: A descriptive correlation study was conducted. Study participants, recruited by Hankook Research from March 2 to March 5, 2021, included 300 women aged 19 to 49 living in South Korea, and 100 people were randomly allocated and enlisted for each age group out of 700,000 Hankook Research Panels recruited in advance from 17 cities and provinces nationwide. Data were collected through a self-reported questionnaire and analyzed using Pearson's correlation coefficient and Hayes' Process Macro Model 4 with 95% bias-corrected bootstrap confidence interval via SPSS statistics 27.0. Results: Suicidal ideation was significantly correlated with fear of COVID-19 (r = .16, p = .006) and depression (r = .65, p < .001). The mediation effect of depression in the relationship between the fear of COVID-19 and suicidal ideation was found to be significant (B = 0.40, boot 95% CI: 0.21~0.61). However, social distancing did not significantly affect suicidal ideation via depression (B = - 0.79, boot 95% CI: - 1.94~0.26). Conclusion: It is necessary to develop and apply interventions to prevent depression and suicidal behaviors by continuously observing and reducing the negative psychological responses caused by COVID-19.

• 통합자연과학논문집
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• 제15권1호
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• pp.9-18
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• 2022

This research examines the power of bootstrap two-sample test, and compares it with the powers of two-sample t-test and Wilcoxon rank sum test, through simulation. For simulation work, a positively skewed and heavy tailed distribution was selected as a population distribution, the chi-square distributions with three degrees of freedom, χ²₃. For two independent samples, the fist sample was selected from χ²₃. The second sample was selected independently from the same χ²₃ as the first sample, and calculated d+ax for each sampled value x, a randomly selected value from χ²₃. The d in d+ax has from 0 to 5 by 0.5 interval, and the a has from 1.0 to 1.5 by 0.1 interval. The powers of three methods were evaluated for the sample sizes 10,20,30,40,50. The null hypothesis was the two population medians being equal for Bootstrap two-sample test and Wilcoxon rank sum test, and the two population means being equal for the two-sample t-test. The powers were obtained using r program language; wilcox.test() in r base package for Wilcoxon rank sum test, t.test() in r base package for the two-sample t-test, boot.two.bca() in r wBoot pacakge for the bootstrap two-sample test. Simulation results show that the power of Wilcoxon rank sum test is the best for all 330 (n,a,d) combinations and the power of two-sample t-test comes next, and the power of bootstrap two-sample comes last. As the results, it can be recommended to use the classic inference methods if there are widely accepted and used methods, in terms of time, costs, sometimes power.

• 실천공학교육논문지
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• 제15권2호
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• pp.509-517
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• 2023

TextRank 알고리즘을 활용한 연관 단어 추천 시스템과 사용자가 선택한 단어 기반 아이디어 생성 서비스를 반응형 웹으로 제공한다. 연관 단어 추천 시스템에서는 TextRank 알고리즘을 이용한 단어별 가중치 부여 방법 및 SoftMax를 적용한 확률 출력 방법을 논한다. 아이디어 생성 서비스에서는 mini-GPT를 이용한 아이디어 생성 방법과 인공지능 강화학습 방법에 대해 논한다. 반응형 웹에 대해서는 React와 Spring Boot, Flask 간의 연동 과정에 대해 논하며 전체적인 구동 방식에 대해 서술한다. 사용자가 원하는 주제를 입력하면 연관된 단어를 제공한다. 사용자는 연관된 단어를 선택하거나 원하는 단어를 추가하여 마인드맵을 구성한다. 사용자가 구성된 마인드맵에서 조합할 단어를 선택하면 새로 생성된 아이디어와 그와 연관된 특허를 제공한다. 본 웹서비스는 생성된 아이디어에 대해 다른 사용자와 공유할 수 있으며, 별점으로 사용자 피드백을 받아 인공지능을 개선한다.

• 인터넷정보학회논문지
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• 제25권1호
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• pp.39-48
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• 2024

코로나19의 발생으로 인한 방역 및 소독업무의 중요성이 높아짐에 따라 소독원을 모집하고 싶은 소독사업자와 일하고 싶은 소독원의 수요가 증가했지만, 구인·구직은 쉽지 않은 실정이며, 소독 업무에 대한 자동화와 업무를 효율적으로 관리할 수 있는 시스템이 필요하다. 따라서 본 논문에서는 O2O 소독 서비스 시스템을 MVC 패턴을 사용하여 설계하고, MySQL, Ejs/BootStrap 뷰, Node.js를 통해 구현한다. 또한, AWS 클라우드 서비스와 연동하여 사용자가 언제 어디서나 시스템을 사용할 수 있게 한다. 제안한 O2O 소독 서비스 시스템을 통해 국내 소독방역 시장의 인력 채용의 어려움을 해결하고, 기존의 비효율적인 소독 업무 프로세스 개선을 기대한다.

• 정보학연구
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• 제8권4호
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• pp.91-102
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• 2005

In this paper, development of embedded system based on Windows CE 5.0 which released recently is studied. Embedded softwares for the target board using S3C2410A SOC based on ARM920T core are composed of (1) BSP(Board Support Package) contains an OAL(OEM Adaptation Layer) which includes a boot loader for initializing and customizing target hardware, device drivers, and a corresponding set of configuration files (2) Windows CE 5.0 kernel (3) SDK and MP3 test application. Particularly, PB(Platform Builder) provides the efficient functions to build, test and debug the BSP and CE kernel. It is looked forward to being widely spread that Windows CE 5.0 will be utilized at smart devices such as PMP, CNS and DMB phone which inevitably require a display device.

• 대한임베디드공학회논문지
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• 제12권2호
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• pp.89-96
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• 2017

We develop an embedded system to measure various sensor data, control multiple motors, and communicate with mobile devices for system managements. Choosing TI AM3359 microprocessor featuring high processing performance, low power consumption, and various I/O device support, we design and build the embedded system hardware so that it supports multiple global positioning system (GPS) and gyro sensor modules to measure precise position; multiple pulse width modulation (PWM) outputs to control multiple direct current (DC) motors; a Bluetooth module to communicate with mobile devices. Then, we port the boot loader and device drivers to the built circuit board and construct the firmware development environment for the application programming. The performance of the designed and implemented embedded system is demonstrated by real motor control test using GPS and gyro sensor data and control parameters configured by a mobile device.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.233-235
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• 2012

Continually having growed up overseas construction market for new Nuclear Power Plant(NPP), the exports of Korean Reactor emerges as the key task of National Nuclear Business. The objective of this study is to strengthen the competitiveness of Korean Reactor through the improvement of Construction Project Contract & Delivery System for NPP. This study suggests the method for increasing Korean Reactor's competitiveness of exports by analyzing the business environment of foreign market and comparing Contract & Delivery System between domestic and foreign.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2006년도 춘계공동학술대회
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• pp.237-249
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• 2006

Critical incident can be happened at any time, any places without any pre-notification. For minimizing the loss of the life safety, financial and so on caused by the risk, most of company needs a system what can activate the critical incident management plan to prevent, plan for and respond to events that become critical incident. But a lot of company still don't have such a detailed system in our country and almost company has no effective training way for to boot. This paper shows the way to activate the risk management system to work efficiently the plan. The training way, proposed by this paper, is a incident command simulator based on virtual reality and scenario generation software.

• 대한방사선기술학회지:방사선기술과학
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• 제14권1호
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• pp.45-48
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• 1991

Recently developed new step wedge has a small size as $10{\times}10\;cm^2$. It can use central beam, and is affected little by scattered rays emmitted from the neighboring step wedges. It's characteristics are same as the intensity scale method, and are excellent compared with conventional boot strap methods. Moreover, the method using new step wedge is simple in operation, and the characteristics are excellent. Now, the above method using new step wedge can supercede the distance method.