• 한국멀티미디어학회논문지
• /
• 제8권10호
• /
• pp.1383-1390
• /
• 2005

모바일 멀티미디어 저장 서버는 동시에 다수의 개인용 이동 단말기(PDA)에서 요청하는 데이터를 실시간으로 저장 및 전송을 해야 한다. 그러나, 대역폭이 작은 모바일 인터넷 환경에서 다수의 개인용 이동 단말기가 동시에 서버로 접속하게 되면 병목(BottleNeck) 현상이 발생할 수 있다. 본 논문에서는 카메라가 장착된 개인용 이동 단말기에서 실시간으로 캡쳐(capture)한 영상을 모바일 변환 저장서버에서 저장 및 전송을 할 때 모바일 멀티미디어 저장 서버에서 발생할 수 있는 병목 현상을 효율적으로 해결할 수 있는 새로운 방법으로 가중치 기반의 동적 가변 디스크 스케줄링을 제안하고, 기존 방법들과 비교를 통해서 제안한 방법의 우수한 성능을 증명한다.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제11권1호
• /
• pp.466-483
• /
• 2017

Zen Cart is an open-source online store management system. It is used all over the world because of its stability and safety. Today, Zen Cart's session security mechanism is mainly used to verify user agents and check IP addresses. However, the security in verifying the user agent is lower and checking the IP address can affect the user's experience. This paper, which is based on the idea of session protection as proposed by Ben Adida, takes advantage of the HTML5's sessionStorage property to store the shared keys that are used in HMAC-SHA256 encryption. Moreover, the request path, current timestamp, and parameter are encrypted by using HMAC-SHA256 in the client. The client then submits the result to the web server as per request. Finally, the web server recalculates the HMAC-SHA256 value to validate the request by comparing it with the submitted value. In this way, the Zen Cart's open-source system is reinforced. Owing to the security and integrity of the HMAC-SHA256 algorithm, it can effectively protect the session security. Analysis and experimental results show that this mechanism can effectively protect the session security of Zen Cart without affecting the original performance.

• 정보처리학회논문지:컴퓨터 및 통신 시스템
• /
• 제5권5호
• /
• pp.117-126
• /
• 2016

최근 빅 데이터나 소셜 네트워크 서비스의 활용도가 증가하면서 기존 관계형 데이터베이스의 한계를 극복한 NoSQL 데이터베이스의 수요가 꾸준히 증가하고 있다. 디지털 포렌식 관점에서 관계형 데이터베이스의 디지털 포렌식 조사 기법은 꾸준히 연구되어 왔으나 NoSQL 데이터베이스의 디지털 포렌식 조사 기법에 대한 연구는 거의 없는 실정이다. 본 논문에서는 메모리 기반의 Key-Value Store NoSQL 데이터베이스인 Redis를 소개하고 디지털 포렌식 관점에서 살펴보아야 할 아티팩트의 수집과 분석, 삭제된 데이터 복구 기법을 제안한다. 또한 제안된 데이터 복구 기법을 도구로 구현하여 복구 기법을 검증한다.

• 통상정보연구
• /
• 제10권1호
• /
• pp.117-135
• /
• 2008

It may be claimed that generating revisit intention is very important task in online marketing environment. The purposes of this study were to investigate empirically the relationships among online experiential value, affect, trust and re-visit intention in Internet Shopping store. The results of this study suggest that the service experiential value and economic experiential value significantly have influence on trust and affect. But playfulness experiential and aesthetic experiential values had not effect trust. And trust and affect factors significantly influenced intention of re-visit. Based on major findings of this study, both academic and practical issues were discussed and suggestions in this paper.

• 한국의류학회지
• /
• 제27권6호
• /
• pp.635-642
• /
• 2003

The purposes of this study were to explore the consumer attitude toward the retail sales, to examine the relationships between the sale attitude and the price-related variables(i.e., price consciousness, sales proneness, and value consciousness), and to examine the effects of the sale attitude and the price-related variables on the perceived price value during the retail sales. Data were collected from 790 undergraduate students using the two types of questionnaires representing the sale and non-sale situations, and 776 responses were analyzed. Factor analysis of the sale attitude extracted five dimensions including price benefit, limited product assortment, impulse buying, low service quality, and disordered store atmosphere. The price benefit and the impulse buying factors were related with all the 3 price-related variables, and all the sale attitude factors were related with the value consciousness. The price benefit and the impulse buying factors positively affected the perceived price value under the sale situation.

• Human Ecology Research
• /
• 제60권4호
• /
• pp.521-533
• /
• 2022

Using Bernd H. Schmitt's experiential modules, this study investigated the effect of shopping value on recognizing the importance of customer experience. A survey was conducted with 400 adults aged in their 20s to 50s. To analyze the data, factor analysis, a reliability test, cluster analysis, and ANOVA were conducted. The results were as follows. First, the shopping values exhibited by sportswear consumers were a utilitarian shopping value and a hedonic shopping value. Through these, consumers were classified into four groups: a shopping value-oriented group, a utilitarian shopping value group, a shopping value-unconcern group, and a hedonic shopping value group. Second, the customer experience consisted of five factors: sensory experience, emotional experience, cognitive experience, behavioral experience, and relational experience. Third, a significant difference was observed in customers' perceived experiences according to shopping value type. In the shopping value-oriented group, all customer experiences were generally considered important, followed by the hedonic shopping value group and the shopping value-unconcern group, with the utilitarian shopping value group least likely to perceive customer experiences as important. In addition, cognitive and emotional experiences were rated highest among the five experiences, indicating that these were the most important store experiences among the various customer experience components.

• 한국산학기술학회논문지
• /
• 제15권1호
• /
• pp.475-481
• /
• 2014

최근의 차량용 블랙박스는 교통사고의 원인을 결정하기 위해서 여러 가지 개선된 방법이 적용되고 있다. 그러나 대부분의 블랙박스는 충격이 발생하면 기존에 저장된 임계값과 비교하여 현재 발생한 충격 데이터가 임계값을 초과할 경우, 이벤트 발생과 함께 영상정보를 메모리에 저장하는 방법을 사용하고 있다. 위와 같은 방법은 다수의 영상정보를 저장하는 문제점을 갖고 있으며, 또한 영상을 분류하여 저장하지 않기 때문에 사용자가 영상을 확인하고 삭제하는 문제점을 갖고 있다. 본 논문에서는 차량용 블랙박스가 상황을 인지하고 스스로 가중치가 낮은 데이터를 우선 삭제할 수 있는 온톨로지 기반의 상황인지 알고리즘을 제안한다.

• 한국식품영양학회지
• /
• 제28권3호
• /
• pp.358-368
• /
• 2015

The study is focused on analyzing the SNS using characteristics of the people surveyed, as for the SNS acceptance channel of the food service corporations, accounted voluntarily for 71%. The SNS food service information regarding information of menu, location of store, price, coupon, taste evaluation, event, promotion, reservation and store atmosphere was researched. The most preferred information sharing for SNS food service were researched and found Facebook, blog and others in increasing order. The most preferred media to obtain SNS food service information were smart phone, desktop computer and others. The result of verifying differences in the perceived ease of use were also evaluated according to the food service corporation of SNS using characteristics of the people and was found: the longer period of SNS use, longer was access time: more number of visiting times, higher perceived ease of use. As for the difference in the perceived service value: longer the period of SNS use, more preferred was the blog: the more number of visiting times, the higher perceived service value. As for the difference in the online mouth-to-mouth intention: longer the period of SNS use, longer was access time: the more number of visiting times, the higher online mouth-to-mouth intention. Therefore, these research results provide useful implications in the working-level aspects such as providing basic data and the academic approach of the study, when the food service corporations establish marketing strategies through SNS.

• 한국의류산업학회지
• /
• 제17권4호
• /
• pp.561-573
• /
• 2015

The influence of tourists on the retail market in Korea continues to grow, and China has become the largest outbound-spending nation in the world. Korea's retail industry must comprehend the sophisticated consumption behavior of Chinese tourists. Hence, we explored how the experiential value of shopping in Korea affected Chinese tourists' satisfaction levels regarding stores and products. Findings from this study suggest entertainment and escapism mediate the effect of experiential value on consumer attitudes toward products and stores. This research was conducted with Chinese female tourists who shopped in Korea during their latest visit to this country. CFA and SEM were implemented using AMOS 20.0. The analysis of survey data produced interesting results. Visual appeal, crowding, and service excellence had positive impacts on entertainment, and they had a positive influence on both store satisfaction and product satisfaction. Regarding escapism, crowding and economic benefits had positive impacts, whereas visual appeal and service excellence had no effects. Results showed that escapism had a negative influence on attitudes toward both products and stores. To be clear, escapism refers to the status of absorption by which consumers are highly occupied with pleasant feelings, therefore, shopping when the motive of escapism is high is likely to be less rational and more impulsive. In this study, the diverse roles of different emotions associated with entertainment and escapism in the context of tourism shopping were identified. The findings provide practical implications for developing retail strategies and highlight the importance of the experiential values of shopping for tourists.

• 융합신호처리학회논문지
• /
• 제8권3호
• /
• pp.192-198
• /
• 2007

본 논문에서는 ROM의 크기를 줄여 전력 소모를 줄일 수 있는 DDFS를 제안하였다. 새롭게 제안된 ROM 압축방식은 두 개의 ROM을 사용하여 원하는 주파수를 합성함으로써 전체적인 ROM들의 크기를 줄여준다. 표본화된 사인파의 양자화 값은 양자화 ROM(Quantized ROM : Q-ROM)과 차동 ROM(Differential ROM : D-ROM)에 저장된다. ROM 크기를 줄이기 위해 사인파를 양자화 할 때 일련의 차동 양자화 기술을 응용, 변형하여 두 개의 ROM을 사용한 QD-ROM 압축방식을 제안한다. 1/4주기의 사인파를 $2^L$개의 블록으로 나누어 양자화하고 이를 Q-ROM에 저장한다. D-ROM에는 Q-ROM의 표본화 간격을 $2^M$으로 나누어 표본화하고 양자화된 값은 그 블록의 표본화된 Q-ROM과의 차이만을 양자화하여 저장한다. 이렇게 함으로써 D-ROM에 저장되는 양자화 값의 최대 크기는 Q-ROM에 저장되는 양자화 값보다 작은 양이기 때문에 적은 데이터 길이로도 저장이 가능하다. 이를 사용함으로써 최대 67.5%의 ROM 크기를 감소시켜 전력소모를 줄일 수 있다.