• International Journal of Contents
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• v.11 no.1
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• pp.1-6
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• 2015

The development of information and technology has brought plenty of changes to the educational environment. The prevalence of smart phones is particularly playing a huge role in shaping learning methods. Smart phones provide the opportunity to scan QR codes, which can greatly ease access to information. Due to a high recognition speed, recognition rate, and restoration rate, they can be useful tools for English teachers to use in their class. In this study, we suggest using QR codes for writing and picture descriptions. Based on this study, more research should invest in Technology Embedded English teaching models to create better English classes for students.

• International Journal of High-Rise Buildings
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• v.1 no.1
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• pp.61-72
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• 2012

When Cole Porter wrote the song "Anything Goes" in 1934, he did not include skyscraper examples. The recently completed Chrysler and Empire State buildings followed decades of tall building development in a logical and predictable line. Today, dramatic improvements in materials and methods of analysis, design and fabrication have given architects and engineers freedom to imagine, and contractors to build, towers in configurations never seen before. If writing now, Porter would surely have mentioned such designs to demonstrate anything goes. Or does it? This article explores the possibilities and challenges of tall building structural design through current and proposed projects. Examples include engineering buildings with outward forms that appear structurally unfavorable and taking advantage of load reduction through shaping opportunities.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.21 no.4
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• pp.1077-1088
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• 1996

In this paper, we propose a new method to analyze the performance degradation by timing jitters in the receivers of intensity modulation/direct detection digital optical communication systems where pulse-shaping filters are used to minimize intersymbol interference. The results obtained from the proposed analytical method show that conventional analytical methods underestimate the influence of timing jitters on the receiver performance. Using the proposed anlaytical method, we derive an analytic equation for approximated power penalty due to timing itters and obtain an exact power penalty by numerical analyses. Assuming Gaussian or uniform probability density function for timing jitters, we also show that assumption of Gaussian distribution for timing jitters yields more performance degration than that of uniform distribution.

• Bulletin of the Korean Chemical Society
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• v.32 no.12
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• pp.4195-4198
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• 2011

Intramolecular ${\pi}-{\pi}$ and ${\sigma}-{\pi}$ interactions are omnipresent for numerous energetic and structural phenomena in nature, and the exact description of these nonbonding interactions plays an important role in the accurate prediction of the three-dimensional structures for numerous interesting molecular systems such as protein folding and polymer shaping. We have selected two prototype molecular systems for benchmarking calculations of intramolecular ${\pi}-{\pi}$ and ${\sigma}-{\pi}$ interactions. Accurately describing conformational energy of such systems requires highly elaborate but very expensive ab initio methods such as coupled cluster singles, doubles, and (triples) (CCSD(T)). Our calculations reveal a double hybrid density functional incorporating dispersion correction (B2PLYP-D) that agrees excellently with the CCSD(T) results, indicating that B2PLYP-D can serve as a practical method of choice.

• Journal of Chest Surgery
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• v.26 no.10
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• pp.787-790
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• 1993

The purpose of this study is to analyze the early results by the operative methods in 36 patients with pectus excavatum during the period August 1989 to August 1993. We underwent Ravitch`s operation in 15 patients [mean age : 11.0], which consists of subperichondral resection of all deformed cartilages, anterior wedge osteotomy and fixation in place with wire sutures of the sternum, and sternal eversion operation in 21 patients[mean age : 5.3], which consists of en-bloc resection of deformed sternum and cartilages, tailoring of the costal cartilages and shaping of the sternum and fixation of sternum and cartilages. Early results were satisfactory in 93% [Excellent 93%] for Ravitch`s operations and in 100% [Excellent 90% and Good 10%] for sternal eversion operations. But late results by sternal growth will be necessary longer follow-up.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.3
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• pp.539-546
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• 1997

In this paper, we proposed a new mehtod to analyze the performance degradation by timing jitters in the APD (avalanche photodiode) receivers of intensity modulation/direct detection digital optical communication systems where raised cosine pulse-shaping filters are used to reduce the effect of noise while minimizing intersymbol interferences. The proposed analytical method is an extension of an analytical method we have already developed for pin diode receivers, and incorporates the effects of APD's multiplication factor and resulting shot noise. Using the proposed analytical method, we derive an approximated power penalty due to timing jitters based on an assumption of Gaussian distribution for timing jitters, and compare with that of the conventional analytical method. The results obtained from the proposed analytical method show that conventional analytical methods underestimate the influence of timing jitters on the reciver performance. The results also show that APD's multiplication factor which optimizes receiver sensitivity is smaller than that obtained by the conventional analytical method.

• Proceedings of the KACD Conference
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• 2003.11a
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• pp.595-595
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• 2003

I. Objectives This study was done to evaluate which type of Ni-Ti instrument be able to perform canal shape well in the simulated canal with abrupt curvature near it's apex. II. Materials and Methods A total of 96 simulated root canals were made in epoxy resin(EPOXICURETM, BUEHLER, USA), ＃15 finger spreader (MANI, Japan) were used as root canal templates. The simulated root canal were made with radius of curvature of 1.5 mm, 3.0 mm, 4.0 mm, 6.0 mm respectively, and angle of curvature of all simulate camals was 90 degree.(omitted)

• Journal of Korean Clinical Nursing Research
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• v.16 no.1
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• pp.107-117
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• 2010

Purpose: The purpose of this study was to identify types and characteristics of anger expression in clinical nurses. Methods: Q methodology was used to analyze each individual participant's subjectivity on anger expression. A total of forty clinical nurses arranged 32 pre-selected Q statement cards on a 9 point scale, shaping the cards' pile into a normal distribution. Then the data from the arranged cards were analyzed using the QUANL PC Program. Results: Three types of anger expression were identified; 'reasonably overcoming', 'emotionally expressing', and 'internally mitigating' including both positive and negative aspects. Conclusion: Adequate strategies to resolve anger in clinical nurses needs to be developed according to anger expression types.

• Journal of Wellbeing Management and Applied Psychology
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• v.7 no.2
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• pp.39-47
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• 2024

This study investigates the impact of mega-influencers and micro-influencers on consumer trust, brand attitude, and purchase intention within the beauty industry. Methods: A survey of 160 adults was conducted in March 2024, analyzing responses to the influence of a beauty mega-influencer ("Isa Bae") and a micro-influencer ("Day Beauty"). Participants were surveyed online over two weeks, and the data were analyzed using statistical tools to compare the influence of both types of influencers. Results: The results indicated that mega-influencers had a more substantial effect on reliability and brand attitude compared to micro-influencers, although both types of influencers significantly influenced purchase intentions. Influencer attractiveness and expertise emerged as critical factors in shaping consumer perceptions and behaviors. Conclusion: This study provides insights into optimizing influencer marketing strategies by leveraging the distinct characteristics and scales of influencers to enhance consumer engagement and brand loyalty. The findings underscore the importance of choosing the appropriate influencer type to maximize marketing effectiveness and consumer trust in the digital marketing landscape.

• Journal of the Ergonomics Society of Korea
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• v.36 no.5
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• pp.485-498
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• 2017

Objective: This study aims to survey and compare three systemic accident investigation techniques of Accimap, STAMP and FRAM, based on the application studies of the Sewol ferry accident. Background: Traditional accident investigation methods such as domino models, FTA, etc. work well for losses caused by physical component failures or actions of human in relatively simple systems, but are unable to depict mechanisms generating errors and violations in the current complex socio-technical systems. For better understanding the structure and behavior of the socio-technical systems, systemic techniques have been developed and used. Method: This study was mainly based on survey of literatures through surfing webpages of ScienceDirect and Google, and ergonomics relevant journals. The key words of Sewol, Sewol ferry, Sewol ferry accident, etc. were used in the survey. Results: Three systemic accident investigation methods included similar actors in the Sewol ferry accident including government, Ministry of Ocean and Fisheries, Korean Coast Guard, Korean Register of Shipping, Korea Shipping Association, Chonghaejin Marine Company, crew members. The methods graphically represented each level's failures or performance variabilities of relevant functions and relationships between them. It was shown that the systemic methods consider the entire system, ranging from the environment in which the accident occurred, to the role of government in shaping the system of work. Each method has its own comparative pros and cons, but the Accimap has advantages in terms of time of analysis, data required, model complexity and degree of comprehensiveness. Conclusion: This study reviewed and compared three systemic accident investigation methods, which showed that there are systemic characteristics and pros and cons in the methods. Application: The results would be used as a guideline when selecting accident investigation methods.