• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.3
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• pp.510-521
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• 2020

The university is attempting educational innovation to cultivate talents required by society. The purpose of this study was to prove the educational effect by applying the PBL to on a fashion theoretical course. The research methods are theatrical research and model development research to guide to utilizing PBL. As a result of this study, the learners' satisfaction with the subject applying PBL was evaluated quite positively. In general, it has been shown to have a very effective effect on improving the learner's problem-solving capability, cooperative learning capability, and self-directed learning capability. In particular, the problem-solving capability is relatively high compared to other factors. The result is consistent with the educational goal of the PBL for improving the learner's problem-solving capability. Perceivable correlation analysis on the relationship between the factors to grasp the educational effect of the PBL revealed the factors with a static correlation. In particular, the problem solving capability and cooperative learning capability developed a significant correlation with self-directed learning capability. This is a testament to their ability to exert greater influence when the competencies that each learner develops are combined.

• Investigative Magnetic Resonance Imaging
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• v.13 no.1
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• pp.22-30
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• 2009

Purpose : Patient motion during magnetic resonance (MR) imaging is one of the major problems due to its long scan time. Entropy based post-processing motion correction techniques have been shown to correct motion artifact effectively. One of main limitations of these techniques however is its long processing time. In this study, we propose several methods to reduce this long processing time effectively. Materials and Methods : To reduce the long processing time, we used the separability property of two dimensional Fourier transform (2-D FT). Also, a computationally light metric (sum of all image pixel intensity) was used instead of the entropy criterion. Finally, partial Fourier reconstruction, in particular the projection onto convex set (POCS) method, was combined thereby reducing the size of the data which should be processed and corrected. Results : Time savings of each proposed method are presented with different data size of brain images. In vivo data were processed using the proposed method and showed similar image quality. The total processing time was reduced to 15% in two dimensional images and 30% in the three dimensional images. Conclusion : The proposed methods can be useful in reducing image motion artifacts when only post-processing motion correction algorithms are available. The proposed methods can also be combined with parallel imaging technique to further reduce the processing times.

• Journal of Popular Narrative
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• v.26 no.3
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• pp.87-120
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• 2020

The study noted the characteristics of the web novel's 'Book Travel' motif, which reflects the characteristics of popular culture content, which is free to use familiar genre grammar or code. The imagination of the main character entering the work he read in the real world is a reinterpretation of the existing genre grammar of the web novel, and studying the motif is meaningful in reviewing the intertext of the genre. This motif, summarized as 'Book Travel' differs from other genres in the romance fantasy genre, which can also be used to reveal the gender characteristics of the genre. The study noted that the 'Book Travel' motif was born from an interactive interpretation of existing narratives, thus having a affinity with dimensional shift, regression, and alternative historical objects, and referring to the writing norms of Fanfiction. Through this, it was predicted that the re-combination of existing narratives and interference between genres would continue in the future. Next, the original move in the romance fantasy genre was seen as quite conservative and revealing the logic of self-improvement even though people around him became the main characters and overthrew the narrative. The characters should use their knowledge of the future of the real world to fight in a world of survival where destruction has been predicted. The appearance of an ethical and self-help subject is interesting, but on the other hand, I could look at conservatism in that romance is a way of survival and achievement of characters. The research is meaningful in that it reviewed the characteristics of the original transfer motif, which started fairly quickly in the romance fantasy genre, and reviewed its appearance background and characteristics. There was a limit to the collection of physical works and limited platform. The above limits are intended to be supplemented by further reviewing and supplementing later works.

• Economic Analysis
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• v.27 no.4
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• pp.1-42
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• 2021

The outlook for Korea's consumer price inflation rate has a profound impact not only on the Bank of Korea's operation of the inflation target system but also on the overall economy, including the bond market and private consumption and investment. This study presents the prediction results of consumer price inflation in Korea for the next three years. To this end, first, model selection is performed based on the out-of-sample predictive power of autoregressive distributed lag (ADL) models, AR models, small-scale vector autoregressive (VAR) models, and large-scale VAR models. Since there are many potential predictors of inflation, a Bayesian variable selection technique was introduced for 12 macro variables, and a precise tuning process was performed to improve predictive power. In the case of the VAR model, the Minnesota prior distribution was applied to solve the dimensional curse problem. Looking at the results of long-term and short-term out-of-sample predictions for the last five years, the ADL model was generally superior to other competing models in both point and distribution prediction. As a result of forecasting through the combination of predictions from the above models, the inflation rate is expected to maintain the current level of around 2% until the second half of 2022, and is expected to drop to around 1% from the first half of 2023.

• Journal of the Korean Society of Radiology
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• v.85 no.1
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• pp.184-196
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• 2024

Purpose We investigated potentially promising imaging findings and their combinations in the evaluation of cognitive decline. Materials and Methods This retrospective study included 138 patients with subjective cognitive impairments, who underwent brain MRI. We classified the same group of patients into Alzheimer's disease (AD) and non-AD groups, based on the neuropsychiatric evaluation. We analyzed imaging findings, including white matter hyperintensity (WMH) and cerebral microbleeds (CMBs), using the Kruskal-Wallis test for group comparison, and receiver operating characteristic (ROC) curve analysis for assessing the diagnostic performance of imaging findings. Results CMBs in the lobar or deep locations demonstrated higher prevalence in the patients with AD compared to those in the non-AD group. The presence of lobar CMBs combined with periventricular WMH (area under the ROC curve [AUC] = 0.702 [95% confidence interval: 0.599-0.806], p < 0.001) showed the highest performance in differentiation of AD from non-AD group. Conclusion Combinations of imaging findings can serve as useful additive diagnostic tools in the assessment of cognitive decline.

• Journal of Internet Computing and Services
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• v.16 no.3
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• pp.33-41
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• 2015

In this paper, the simplification procedure of Karnaugh Map, which is essential to design digital logic circuits, was implemented as web-based educational Java applets. The learners will be able to experience interesting learning process by executing the proposed Java applets. In addition, since the proposed Java applets were designed to contain educational technologies by step-by-step procedure, the maximization of learning efficiency can be obtained. The learners can make virtual experiments on the simplification of digital logic circuits by clicking on some buttons or filling out some text fields. Furthermore, the Boolean expression and its schematic diagram occurred in the simplification process will be displayed on the separate frame so that the learners can learn effectively. The schematic diagram enables them to check out if the logic circuit is correctly connected or not. Finally, since the simplification algorithm used in the proposed Java applet is based on the modified Quine-McCluskey minimization technique, the proposed Java applets will show more encouraging result in view of learning efficiency if it is used as assistants of the on-campus offline class.

• The Korean Journal of Applied Statistics
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• v.33 no.2
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• pp.185-201
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• 2020

Scenario population projection reflects the high probability of future realization and ease of statistical interpretation. Statistics Korea (2019) also presents the results of 30 combinations, including special scenarios, as official statistics. However, deterministic population projections provide limited information about future uncertainties with several limitations that are not probabilistic. The deterministic population projections are scenario-based estimates and show a perfect autocorrelation of three factors (birth, death, movement) of population variation over time. Therefore, international organizations UN, the Max Planck Population Research Institute (MPIDR) of Germany and the Vienna Population Research Institute (VID) of Austria have suggested stochastic based population estimates. In addition, some National Statistics Offices have also adopted this method to provide information along with the scenario results. This paper calculates the demographics of Korea based on a probabilistic or stochastic basis and then draws the pros and cons and show implications of the scenario (deterministic) population projections.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39C no.7
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• pp.552-558
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• 2014

In this paper, we propose a side-peak cancellation technique of composite binary offset carrier (CBOC) signals for e-navigation. First, we divide a CBOC sub-carrier into several sub-carrier pulses, and then, observe that CBOC autocorrelation is the sum of multiple sub-correlation functions. Finally, we propose a novel correlation function with no side-peak and a sharp main-peak by combining the sub-correlation functions to improve the positioning accuracy. From numerical results, we confirm that the proposed correlation function with a sharp main-peak provides a better positioning performance than the conventional correlation functions in terms of the tracking error standard deviation.

• Progress in Superconductivity
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• v.9 no.1
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• pp.45-49
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• 2007

We have investigated the optimum combination of the environmental noise condition and type of SQUID pickup coil in order to obtain maximum signal-to-noise ratio (SNR). The measurement probe consists of 1st order gradiometer with pickup coils of 100 mm, 70 mm, and 50 mm baseline length, a 2nd order gradiometer with 50 mm baseline, and a magnetometer. The pickup coils are fabricated by winding Nb wire on a bobbin with 200 mm diameter. Noise and heart signal of a healthy male were measured by various SQUID sensors with different types of pickup coils in various magnetically shielded rooms (MSR), and compared to each other. The shielding factors were found to be 43 dB, 35 dB and 25 dB at 0.1 Hz for MSR-AS, MSR-BS, MSR-CS, respectively. White noises were $3.5\;fT/Hz^{1/2}$, $4.5\;fT/Hz^{1/2}$ and $3\;fT/Hz^{1/2}$ for the 1st order gradiometers, the 2nd order gradiometers, and magnetometer for all MSRs. SNR of the magnetometer was up to 56 dB in MSR-AS, while the 1st order axial gradiometer with 70 mm baseline length was up to 54 dB in MSR-BS. The 2nd order axial gradiometer with 50 mm baseline length of pickup coil was found to be up to 40 dB in MSR-CS.

• 한국항공운항학회:학술대회논문집
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• 2016.05a
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• pp.287-292
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• 2016

본 논문에서는 카페테리아 복리후생의 기본개념의 고찰과 함께 국내 및 국외에서 활용되고 있는 카페테리아 플랜에 대한 사례연구를 통해 A항공사(航空社)를 중심으로 새로운 종업원 복리후생제도 도입을 제시하고자 한다. 복리후생제도 도입방안은 다음과 같다. 첫째, 선택적 복리후생제도에 대한 종업원들의 공감대를 형성하는 것이다. 항공사는 대체로 노동조합이 잘 발달되어 있는 편이고 종업원들의 학력수준도 높은 편이다. 따라서 사내교육 등을 통하거나 노조 설명회를 통하여 전반적인 사회변화에 따른 다양한 선택적 복리후생제도의 효율성, 종업원 니즈에 대한 충족도의 우수성, 저가항공사의 난립에 따른 필연적 M&A 등이 발생할 경우를 대비하여 필요하다는 점, 종업들의 원가에 대한 이해(cost contiousness)가 높아질 수 있다는 점, 등에 대해 알리고 이해를 시킬 필요가 있다. 둘째, 기존에 일률적으로 제공되고 있는 우대탑승제도는 종업원마다 매년 일정한 한도가 부여되지만 티켓을 소비하는 횟수는 각각 다르다. 또한 항공업의 특성상 성수기로 인해 원하는 시간에 원하는 곳을 갈 수 없다는 큰 문제점이 발생하고 곧 니즈 욕구에 대한 불만족으로 직결 한다. 우대탑승 제도에 부여된 항공 티켓 지원은 비수기나 여유 있는 좌석상황에 따라 소비할 수 있기 때문에 종업원의 만족도는 높지 않게 나타난다. 따라서 종업원의 수혜수준을 종업원이 스스로 선택할 수 있게 함으로써, 사원 스스로의 니즈에 맞게 복리후생 계획을 세울 수 있게 하는 카페테리아플랜 즉 선택적 복리후생제도의 도입의 검토가 필요하다. 이런 선택적 복리후생제도는 종업원의 측면에서 좀 더 자신의 상황과 요구에 부합하는 복리후생을 수혜함에 따라 만족도가 증가하고, 스스로 복리후생을 선택함으로써 동기를 부여하는 측면의 의의가 있다. 그러나 현 기업의 능력과 종업원 의식에 대한 정확한 분석 및 이해가 없는 외부 성공사례의 도입은 지금까지 우리나라 많은 기업들의 경영기법 도입사례와 같이 일과성으로 끝나는 위험성도 크다. 따라서 보다 깊은 자기 성찰을 통한 제도의 수용과 이를 부분적으로 개선 및 보완하여 적용할 줄 아는 지혜가 무엇보다도 우선되어야 할 것이다.