• Korea Trade Review
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• v.48 no.1
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• pp.263-285
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• 2023

The purpose of this study is to examine the business model, growth process, and success factors of the successful super app Gojek in the Southeast Asian and Indonesian markets. Gojek's business model analysis focused on the business canvas (9 blocks) that many companies have used to establish business models. Gojek's growth process was analyzed based on timeline. Gojek 1.0 is from the start of the ride hailing service. Gojek 2.0 is a leap forward into a life-friendly platform. Gojek 3.0 is a process of expanding and diversifying domestic and foreign businesses. Gojek 4.0 is a stage of changing to GoTo through mergers with Tokopedia, and setting a higher leap forward. Based on this, the success factors of Gojek are ① Hyperlocalization ② First mobile ③ A company that is loved through mission execution ④ Provide financial inclusion ⑤ Business expansion and diversification through mergers and acquisitions and partnerships ⑥ Entry into overseas markets ⑦ Attracting various partners and investment ⑧ Lock-in effect and hyperpersonalization. The implications obtained through this study and the limitations and direction of the study were discussed.

• The Journal of Korean Obstetrics and Gynecology
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• v.37 no.2
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• pp.17-34
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• 2024

Objectives: The purpose of this study is to evaluate the quality of case reports published in the Journal of Korean Obstetrics and Gynecology from April 2019 to February 2024, compared with January 2015 to March 2019. Methods: Case reports were selected by searching from archive on the website of society of the Journal of Korean Obstetrics and Gynecology. The quality of the case reports were assessed based on CAse REport (CARE) guideline. Results: A total of 30 case reports was finally included for the assessment. Overall quality of reporting for case reports published from April 2019 to February 2024 was improved compared to one of previous study. However, the 4 items of CARE guidelines with an unreported rate of 50% or more - patient's perspective on interventions (96.67%), diagnostic challenges (93.33%), intervention adherence and tolerability (93.33%), adverse events (56.67%) - are items that require active description in future case reports. In addition, Keyword and timeline have more than 50% reported to be 'Not-sufficient' in both previous and present studies. So active efforts by researchers are needed to include 'Case report (or Case study)' in keywords, and to include intervention by period, symptom changes in a timeline. Conclusions: Despite the overall improvement in the quality of reporting in the Journal of Korean Obstetrics and Gynecology, efforts to improve the quality of case reports should be continued.

• 한국연소학회:학술대회논문집
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• 2006.10a
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• pp.145-150
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• 2006

At the furnace top, the distribution of charging coke and ore is adjusted to control the reducing gas flow distribution in the furnace. It is necessary to predict operation condition of blast furnace according to the burden profile to judge whether charging is properly conducted In this study, We propose the model for predicting while layer structures whithin furnace when top burden profile was given. Layer structure of coke and ore could be predicted by top burden profile and solid velocity. Solid velocity is assumed as potential flow. Potential function distribution and timeline are also calculated using solid velocity field. The Calculation is conducted for different burden profile cases. As the result burden distribution and grid structure, which is deformed to match the layer structure in shaft and deadman profile. Gas flow was calculated using this grid, and calculated results are compared with each other.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.6
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• pp.863-870
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• 1993

A new methodology of multimedia data composition generated SRT(Synchronization Relation Tree) dynamically after user composing multimedia date by using high level user interface, and processes message passing protocols to adjust multimedia data temporal composition. In this paperl we propose SRT generating algorithm which transfer user defined timeline diagram to SRT dynamically. SRT generating algorithm is to use divide and conquer methodology and recurvise programming. And prove that it generates and type of multimedia date compositon to SRT.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.43 no.6 s.312
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• pp.71-82
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• 2006

For real-time animation, keyframe animation that consists of translation, rotation, scaling transform nodes is used widely in 3D graphics. This paper presents geometrical watermarking using vertex coordinates in CoordIndex node and interpolator watermarking using keyvalues in PositionInterpolator node for 3D keyframe animation based on VRML. Experimental results verify that the proposed algorithm has the robustness against geometrical attacks and timeline attacks as well as the invisibility.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.06a
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• pp.109-110
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• 2017

파노라마 영상은 $360^{\circ}$ 방향의 모든 경치를 담는 기법을 말한다. 파노라마 영상은 전문적 기술자들이 여러 영상을 정합하여 제작되었지만, 기술이 점차 발전하여 현재는 일반 사용자들도 스마트 폰을 이용하여 손쉽게 파노라마 영상을 제작할 수 있다. 하지만 이는 파노라마 정지영상에 한해있으며 아직까지 파노라마 동영상은 제작에 있어서 기술적 어려움이 있다. 최근 들어서 파노라마 동영상 제작을 위한 여러 동영상 간의 시간축 동기화는 연구되었는데 연속되는 프레임들을 하나의 시퀀스로 묶어 시퀀스 단위로 키포인트 및 디스크립터를 추출 및 비교를 통해 동영상 간의 시간축을 동기화시키는 방향으로 나갔다. 하지만 동영상 시퀀스 간의 간격이 좁아 중복되는 데이터의 양이 많아 디스크립터 비교 연산 시간이 오래 걸리고, 동영상 간의 시퀀스 단위만으로 비교하기 인해 프레임 단위의 정확한 시간축 동기화에 어려움이 있었다. 본 논문에서는 이전 연구의 단점을 개선하여 여러 동영상 간의 시간축을 하나로 동기화시키는 기술을 최적화하는 방법을 제안한다.

• Journal of Korea Multimedia Society
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• v.23 no.1
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• pp.85-92
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• 2020

This paper analyzes the design and usability of maternal notebook mobile application and suggests the improvement direction of the application. The researcher compared and analyzed the functions of maternal notebook applications, conducted user interviews and expert evaluations. The conclusions of this study are the use of appropriate information volume, proportional screen division focusing on main functions, the use of GNB format of main menus, the prohibition of double menu configuration, the use of color consistent with the image of the service, the use of few font sizes, the use of appropriate colors in typography, the use of rich icons with uniform design, card format, list format, but also timeline and infographic forms that make rich user interface design. Maternal notebook application research is expected to be an important reference for research on similar mobile applications with complex functions such as information provision, user history, and community, along with improved research in healthcare design.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.11a
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• pp.82-83
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• 2017

파노라마 영상은 최근 몇 년 사이 스마트 폰을 사용하는 일반 사용자에게 손쉽게 제작할 수 있게 되었다. 하지만 파노라마 동영상은 기술상의 어려움이 있다. 파노라마 동영상을 제작하기 위해서는 두 대 이상의 스마트 폰으로 동시에 촬영을 하여야 하는데, 하드웨어의 차이로 인해 시간축을 동기화하는데 어려움이 발생한다. 이러한 어려움을 극복하기 위해 영상 정보를 이용한 시간축 동기화도 시도되었다. 하지만 영상 정보를 이용한 시간축 동기화에도 어려움이 있다. 영상 정보를 이용하기 때문에 계산복잡도가 높고 영상 내 움직임으로 인해 시간축 동기화 정확도도 떨어진다. 본 논문에서는 영상 정보를 이용하는 대신 소리 파형을 이용한 시간축동기화 기법을 제안한다. 소리 파형 이미지를 이용하여 시간축을 동기화하기 때문에 정확도가 향상되고 시간축 동기화 프로세싱 시간이 단축되는 것을 확인할 수 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.7
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• pp.3307-3321
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• 2018

With the ever-increasing queries related to temporal (or time-related) information, such as the product launching time, in search engine, most web pages will be augmented with such information in the future. Meanwhile, the gradual emergence of the use of electronic textbooks (or e-Textbooks), which enrich the traditional paper-based textbooks with multimedia contents such as interactive quizzes and multimedia-based simulations, has led us to infer that e-Textbooks will be blended with temporal information to support learning. The use of temporal information helps teachers and students to understand the level of prior knowledge required to study a topic, as well as the sequence of learning activities and related sub-topics, that best attains the educational goals. This paper presents a simple yet efficient tool called TimeMap, which is based on mind mapping, to create an e-Textbook called TimeBook that takes account of time-related curriculum and the ability of students to learn via collaboration.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.83-88
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• 2006

우리가 사용하는 이미지뷰어프로그램은 정보전달에만 치중되어 있고 감성적인 부분이 차지하는 바가 적다. 또한 사람들에게 디지털카메라로 찍은 사진들을 보는 것은 많은 과정을 필요로 하고 큰 노력을 요한다. 게다가 다른 사용자들과 즉각적으로 공유하기도 힘들다. 이 같은 문제점들을 해결하는 새로운 이미지뷰어인터페이스를 제안해본다. 기존의 이미지뷰어프로그램들을 분석하고 그에 대한 결과와 문제점을 찾은 후 새로운 디자인 키워드를 제시하였다. 단순함(Simplicity), 즉각성(Instancy), 공유(Sharing), 감성(Sensitivity) 이렇게 네 가지 키워드이다. 사진(Picture)은 이미 지나간 과거이다. 이러한 사진의 시간개념을 Timeline 에 적용하고, 이를 원(Circle)이라는 모양으로 나타내어 사진을 볼 수 있게 하였다. 원이라는 새로운 형태의 인터페이스는 사진을 보다 쉽고 즉각적으로 공유할 수 있다. 데모버젼으로서 매크로미디어 플래시 액션스크립트로 프로그램을 하고 파워메이트(Powermate)를 장치(Device)로 사용하여 시연하였다. 이 인터페이스는 사람들이 쉽게 접할 수 있는 장소면 아무 곳이나 설치가 가능하다. 카페나 회의장소에서 가장 적합하게 어울릴 것이다. 사용자는 다른 이들과 함께 즉각적으로 간단한 방법으로 함께 감성을 나눌 수 있다. 새로운 인터페이스디자인이 사람들에게 쉽게 인지되어, 보다 편리하게 이미지를 확인할 수 있는 가능성을 제시한다.