• 한국컴퓨터정보학회논문지
• /
• 제20권3호
• /
• pp.47-56
• /
• 2015

흥미 있는 웹페이지의 자동화된 탐색은 다양한 응용 분야에 활용될 수 있다. 웹페이지에 대한 사용자의 흥미는 판단하는 것은 사용자의 행동을 관찰함으로 자동화가 가능하다. 흥미 있는 웹페이지를 구분하는 작업은 판별 문제에 속하며, 우리는 실증을 위해 화이트 박스의 학습 방법(로짓회귀분석, 지지기반학습)을 선택한다. 실험 결과는 다음을 나타내었다. (1) 고정효과 로짓회귀분석, polynomial 과 radial 커널을 이용한 고정효과 지지기반학습은 선형 커널보다 높은 성능을 보였다. (2) 개인화가 모델 성능을 향상시킴에 있어 주요한 이슈이다. (3) 사용자에게 웹페이지에 대항 흥미를 물을 때, 구간은 단순히 예/아니 도 충분할 수 있다. (4) 웹페이지에 머문 기간이 매초 증가할 때마다 성공확률은 1.004배 증가하며, 하지만 스크롤바 클릭 수 (p=0.56) 와 마우스 클릭 수 (p=0.36) 지표는 흥미와 통계적으로 유의한 관계를 가지지 않았다.

• 한국경영과학회지
• /
• 제38권1호
• /
• pp.123-138
• /
• 2013

Keyword advertising has been used as a promotion tool rather than the advertising itself to online retailers. This is because the online retailer expects the direct sales increase when they deploy the keyword sponsorship. In practice, many online sellers rely on keyword advertising to promote their sales in short term with limited budget. Most of the previous researches use direct revenue factors as dependent variables such as CTR (click through rate) and CVI (conversion per impression) in their researches on the keyword advertising[14, 16, 22, 25, 31, 32]. Previous studies were, however, conducted in the context of aggregate-level due to the limitations on the data availability. These researches cannot evaluate the performance of keyword advertising in the individual level. To overcome these limitations, our research focuses on conversion of keyword advertising in individual-level. Also, we consider manageable factors as independent variables in terms of online retailers (the costs of keyword by implementation methods and meanings of keyword). In our study we developed the keyword advertising conversion model in the individual-level. With our model, we can make some theoretical findings and managerial implications. Practically, in the case of a fixed cost plan, an increase of the number of clicks is revealed as an effective way. However, higher average CPC is not significantly effective in increasing probability of purchase conversion. When this type (fixed cost plan) of implementation could not generate a lot of clicks, it cannot significantly increase the probability of purchase choice. Theoretically, we consider the promotional attributes which influence consumer purchase behavior and conduct individuals-level research based on the actual data. Limitations and future direction of the study are discussed.

• 한국수산과학회지
• /
• 제50권4호
• /
• pp.406-412
• /
• 2017

Vocalizations of the common dolphin Delphinus Delphis, were recorded from a single hydrophone while coastal visual survey was performed in the East Sea in March 2017. Like most Delphinidae, common dolphins produce whistles, echolocation clicks, and burst-pulsed calls, with repertoires that differ between species and geographically separated populations. This study focuses on using frequency analysis to classify sounds into three categories and to compare them with those of other common dolphin populations. The fundamental frequencies of the whistles were high in the 6 to 14 kHz range, while echolocation clicks were in the 40 to 90 kHz frequency band. These results are similar to high-energy distributions in the same frequency band in other regions. Based on this study of the acoustic characteristics of dolphins off the east coast of Korea, cetacean vocalizations can be classified using a database of cetacean sounds in Korea. In addition, this technique could improve data quality for visual whale surveys and could be applied to various other research subjects.

• 디지털융복합연구
• /
• 제19권8호
• /
• pp.275-283
• /
• 2021

본 연구는 형성평가 (FA)와 총괄평가 (SA) 사이의 관계를 검사하여 대학 EFL 수업 평가 개선을 돕고자 수행되었다. 이 연구의 참여자들은 중국의 4년제 대학에서 선택적으로 8주간의 대학 영어 과정을 수강했던 75명의 학부생들이었다. FA 데이터는 온라인 교육 플랫폼인 Mosoteach를 사용하여 자기 보고식 설문 조사에 의해 코스 마지막 과정에서 수집되었다. 연구 결과를 도출하고자, Pearson 상관관계 분석을 통해 FA와 SA(기말고사 및 수행활동 점수)간의 관련성을 SPSS로 분석하였다. 전반적으로 그 두 평가 점수 간 유의미한 긍정적 상관관계가 있다는 것으로 나타났다. 학생들의 단원 평가, 온라인 토론, 브레인스토밍, 신속한 답변, 그리고 과제 수행에서 교수자들의 엄지척 클릭수와도 깊은 상관관계를 보였다. Mosoteach 앱을 통해 관리되는 FA가 학생들의 수업의 학업 성과를 향상 시킬 수 있었다는 결과는 교육 평가 개선을 위한 경험적 기반을 제공할 수 있음을 시사하였다. 이러한 연구 결과에 따라 EFL 수업 평가에 대한 중요성이 설명되었다.

• 한국컴퓨터정보학회논문지
• /
• 제22권2호
• /
• pp.75-80
• /
• 2017

In this study, we developed a Hedonic Model for Retargeting Advertising Based on Consumer-centerd IoT space for offering useful, interest, and interactive information to consumer. And most existing relative researches about Internet of Things but, this paper focusing on the Type of information, humor, and interactive and analyze the attitude and clicks intention to Retargeting Advertising Based on Consumer-centerd Internet of Things. According to the results, humor Advertising is positively related to attitude and click intention toward Internet of Things Advertising. But information Ad and interactive Ad affect positive to click intention. This is mean that click intention is more immediate reaction of consumers in the IoT space. Therefore Future research will be designed in a more interactive elements that can lead to positive reaction of consumers on the Internet of Things be more effective if you advertise advertising.

• 한국경영정보학회:학술대회논문집
• /
• 한국경영정보학회 2008년도 춘계학술대회
• /
• pp.428-433
• /
• 2008

The online advertising industry's business model undertakes the change from CPM (cost-per-mille)-based to CPC (cost-per-click)-based. However, due to the problem of 'Click Fraud', CPA (cost-per-action) has been regarded as a new step. For CPA, publishers need to get information after a user clicks an advertisement. Therefore, in CPA, the key is to get Conversion Action Data (CAD). This paper introduces two existing mechanisms for getting CAD, compare their characteristics, and analyze their limitations. Then the two new mechanisms are introduced and their requirements and feasibility are analyzed. Lastly, we compare the existing two and the new two mechanisms, and point out each mechanism's business possibility, value and Application Area. This paper will help publishers choose the most appropriate mechanism on the basis of their situation.

• Journal of Chest Surgery
• /
• 제17권4호
• /
• pp.672-677
• /
• 1984

Thromboembolism is a major cause of morbidity and death following implantation of cardiac prosthetic devices. Effective systemic anticoagulation is very important. The presence of thrombus can often be detected by pulmonary edema associated with the disappearance of valve clicks. 2-D echocardiography and phonocardiography are also valuable tools. The most common treatment is reoperation and replacement after discovery early. We have experienced one death of fatal thromboembolism after St. Jude valve replacement was done in 48 years old male diagnosed of severe mitral stenosis. He was treated with warfarin, aspirin, ticlopidine for 10 weeks but died suddenly. At autopsy, valve dysfunction was seen due to organic thrombus arising from atrial septum and confirmed with microscopic findings.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2005년도 제36회 하계학술대회 논문집 A
• /
• pp.111-113
• /
• 2005

In this paper a computer program has been developed using IT technologies for load flow analysis. The program is written in the Java language for the platform and operating system independence. The software technique, such as Standard Widget Toolkit (SWT), Graphical Editing Framework (GEF), and Java web start, are used for the program. The program also has Graphical User Interface (GUI) to enable users to construct power system displays through simple mouse clicks and map directly into visual power system elements on the screen. The input data of the elements of power system can be entered on the screen. The results of the program cail be checked on the screen.

• 대한임베디드공학회논문지
• /
• 제1권1호
• /
• pp.14-19
• /
• 2006

Integrated development environment (IDE) plays an important role in reducing the developm ent time, thereby improving software development productivity. In recent years, ubiquitous sensor networks (USNs) have become increasingly popular. However their application software is developed mostly using command-line-based tools. Such a development process is not only likely to be error-prone but also inconvenient to debug errors. This paper describes a novel IDE for USN application developers called Nano Esto that provides a single, consistent, and integrated environment for building and executing USN applications. The Nano Esto helps the developers edit and cross-compile source code and download the executable image to the program memory of sensor nodes with just a few button clicks. It also provides support for configuring an application-specific kernel, simulating a wireless sensor network, and estimating power consumption in each sensor node. Currently, Nano Esto runs on Linux as well as on Windows with the same look and feel.

• 전자공학회논문지A
• /
• 제31A권5호
• /
• pp.1-9
• /
• 1994

In this paper, we analyzed the performances for FH/CPFSK system with limiter-discriminator detection and integrate-and-dump post-detection filtering under thermal noise and partial-band jamming noise. And,we considered intersymbol interference-related SNR and differential phase parameters for all eight of the possible adjacent bit data patterns, FM noise clicks for evaluating FH/CPFSK and CPFSK Systems. In result, the optimum modulation index h was 0.7 and the optimum value of bandwidth-time product D was 1.0 Next, when we considered the thermal noise under the partial-band jamming, the thermal noise significantly influenced the error probability of system below 20dB approximately but could ignore above 20dB.