사용성 증진을 위한 쇼핑 앱의 UI 디자인 제안 연구 - 베이비붐 세대를 중심으로 -

왕저위 ( Wang¸ Zeyu ),이창욱 ( Lee¸ Chang-wook ) 커뮤니케이션디자인학회 2021 커뮤니케이션 디자인학연구 Vol.77 No.-

본 연구는 설문조사를 통해 국내 4개 쇼핑 앱을 평가 대상으로 선정하였다. 그 후 선행문헌의 연구 성과 기반으로 본 연구에 적합한 UI 디자인 구성요소 및 사용성 평가 원칙을 도출하고 베이비붐 세대를 평가 대상으로 하여 설문조사의 방식으로 사용성 평가를 실시하였다. 마지막에는 조사 결과를 토대로 쇼핑 앱 UI 디자인의 사용성에 존재하는 문제를 확인하여 관련 개선 제안을 제기하였다. 구체적인 제안은 아래와 같다. 첫 번째, 레이아웃을 디자 인할 때 각 화면에서 동일 구성요소의 위치와 조작방식의 일치성을 확보해야 한다. 그리고 화면에는 필요한 정보만 기입해야 하고 같은 화면에서는 한 가지 정보 슬라이딩 방식만 적용해야 한다. 두 번째, 각 화면에서 색채의 사용은 일관성을 확보해야 하고, 아이콘과 배경에는 쉽게 구분할 수 있는 색채를 사용해야 한다. 색채의 수량도 제한되어야 하고 너무 많지 않아야 한다. 그리고 중요한 정보, 버튼 등에는 파장이 긴 색채를 사용하여 베이비붐 세대가 색채를 통해 정보를 쉽게 선별할 수 있어야 한다. 세 번째, 각 화면에서 아이콘 스타일의 일관성을 확보해야 하고 동시에 아이콘의 사이즈와 간격을 가능한 확대하여 충분한 공간을 남겨 베이비붐 세대가 쉽게 클릭할 수 있어야 한다. 그리고 아이콘의 외관은 과도하게 추상적이지 않고 쉽게 이해할 수 있는 구상적인 외관과 대응되는 짧은 명사단어를 사용해야 한다. 본 연구의 결과를 통해 향후 쇼핑 앱 운영 플랫폼이 기획과 보완을 진행하는데 지향적 및 합리적 제안을 제공하고, 베이비붐 세대에게 더욱 효과적인 쇼핑경험을 제공하였으면 한다. In this study, four domestic shopping apps were selected for evaluation through a survey. After that, based on the research results of the preceding literature, UI design elements and usability evaluation principles suitable for this study were derived, and usability evaluation was conducted in the form of a survey with baby boomers as the evaluation target. Finally, based on the survey results, problems in the usability of the shopping app UI design were identified and related improvement suggestions were made. Specific proposals are as follows. First, when designing a layout, it is necessary to ensure the consistency of the position and operation method of the same component on each screen. In addition, only necessary information should be entered on the screen, and only one information sliding method should be applied on the same screen. Second, the use of colors in each screen should be consistent, and easily distinguishable colors should be used for icons and backgrounds. The quantity of colors should also be limited and not too many. And by using long-wavelength colors for important information and buttons, baby boomers should be able to easily select information through color. Third, the style of icons on each screen should be consistent, and at the same time, the size and spacing of icons should be enlarged as much as possible, leaving enough space for baby boomers to easily click. In addition, the appearance of the icon should not be overly abstract and should use short noun words that correspond to the easily understandable, figurative appearance. Through the results of this study, it is hoped that future shopping app operating platforms will provide oriented and rational suggestions for planning and supplementing, and provide a more effective shopping experience for the baby boomers.

EBKCCA: A Novel Energy Balanced k-Coverage Control Algorithm Based on Probability Model in Wireless Sensor Networks

( Zeyu Sun ),( Yongsheng Zhang ),( Xiaofei Xing ),( Houbing Song ),( Huihui Wang ),( Yangjie Cao ) 한국인터넷정보학회 2016 KSII Transactions on Internet and Information Syst Vol.10 No.8

In the process of k-coverage of the target node, there will be a lot of data redundancy forcing the phenomenon of congestion which reduces network communication capability and coverage, and accelerates network energy consumption. Therefore, this paper proposes a novel energy balanced k-coverage control algorithm based on probability model (EBKCCA). The algorithm constructs the coverage network model by using the positional relationship between the nodes. By analyzing the network model, the coverage expected value of nodes and the minimum number of nodes in the monitoring area are given. In terms of energy consumption, this paper gives the proportion of energy conversion functions between working nodes and neighboring nodes. By using the function proportional to schedule low energy nodes, we achieve the energy balance of the whole network and optimizing network resources. The last simulation experiments indicate that this algorithm can not only improve the quality of network coverage, but also completely inhibit the rapid energy consumption of node, and extend the network lifetime.

Decoding Chinese Bilateral Investment Treaties

Zeyu Huang 이준국제법연구원 2022 China and WTO Review Vol.8 No.1

HSKAS : A Novel Hierarchical Shared Key Authentication Scheme in Wireless Sensor Networks

Zeyu Sun,Xiaohui Ji,Yuanbo Li 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.4

Wireless sensor networks (WSNs) are often deployed in hostile environments, thus being subjected to great security risks. However, due to the influence of environment and dynamic topology, the communication radiuses of all nodes are no strictly consistent, which may cause different neighbor number and redundant neighbors for one central node. In this paper, we present a key agreement scheme without the trusted third parties by exploiting the special characteristics of Hopfield neural network: the two nodes converge in a steady state from their respective initial states after iterating finite times, while maintaining the confidentiality of the key by quantifying the key to strings. Compared to existing solution, the proposed method requires less memory and has lower communication overhead to key agreement.

Similar Hand Gesture Recognition by Automatically Extracting Distinctive Features

Zeyu Ding,Yanmei Chen,Xinyu Wu,Yen-Lun Chen 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.4

With the flourish development of computer vision technology, hand gesture recognition plays a moreand more vital role in human-computer interaction for its convenient and nonverbal communication. However,confusion caused by similar gestures brings inherent errors when considering enough meaningful gestures in thedatabase. In this paper, an automatic feature extraction for similar gesture recognition is proposed with respect toconfusion arising in similar gestures. Except the orientation feature, four additional innovative features are extractedto distinguish all the similar gestures remarkably in the experimental database containing 10 numbers and 26 letters. Compared with the conventional method that a couple of similar gestures are extracted as a specific feature, theproposed method distinguishes similar gestures with automatic distinctive feature extraction. Experimental resultsshow high recognition rate and versatility of the proposed method.

Leveraging Extended Chat History through Sentence Embedding in Multi-turn Dialogue toward Increasing User Engagement

Zeyu Ding,Armagan Elibol,Nak Young Chong 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11

Multi-turn dialogue is the major manifestation of a conversation. Compared with single-turn dialogue, response selection is more complex as the context varies. We stress the importance of dialogue history and apply the pre-trained model BERT to assign proper weight to each utterance of a dialogue. Previous works take all the dialogue history as context to measure the matching degree of a context-response pair, causing the quadratic computational cost and truncation of longer sequences exceeding the length limitation of BERT. We propose a sentence-based method to deal with the aforementioned problems, obtaining the sentence embedding of a single unit utterance of dialogue and forming a classification token of a context-response pair. We discuss how to obtain a sentence embedding with high quality and to design the input representations in response selection. The results show that the average of the first-last layer output exhibits the best performance for obtaining a sentence representation. The proposed method, concatenating the sentence embeddings of context with the token embeddings of response candidates, is nearly on a par with the token embedding based SOTA method. Notably, the processable length of dialogue history is enlarged about ten times with a low computational cost, potentially reducing chatbot response time and inspiring user engagement.

Optimization Coverage of Wireless Sensor Networks Based on Energy Saving

Zeyu Sun,Heng Li,Heng Chen,Wei Wei 보안공학연구지원센터 2014 International Journal of Future Generation Communi Vol.7 No.4

The Impression of the Imperial Palace

ZeYu Wang 한국콘텐츠학회 2013 ICCC International Digital Design Invitation Exhib Vol.2013 No.-

Current Controlled with Valley Voltage Detection Three-port Converter with Current-Pulsed Load

Zeyu. Zhu,Ping. Yang,Chaorui Liu,Songrong Wu,Wensheng Song,Jianping Xu,Xiaohui Qu 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5

In small power supply systems such as aircraft and ships, some loads present the characteristics of current pulse. After the pulse load is directly connected to the power supply bus, the instantaneous power of its load presents the pulse characteristic as the load current. In order to balance the difference of instantaneous power, this paper proposes a bi-directional converter to compensate for the current fluctuation caused by the pulse load characteristic, which makes the power supply bus in the state of constant voltage and constant current, and solves the problem of adaptability of pulse load and power supply. In the meanwhile, a current feedback control method with valley voltage loop is proposed to control the bi-directional converter, which is also applicable when there is any change in frequency or duty cycle of the pulse load, even the constant power load. Finally, an experimental prototype is built to verify the correctness of the theoretical analysis.

A Nonlinear Multi-objective k-degree Coverage Protocol Based on Optimization Nodes Scheduling in Wireless Sensor Networks

Zeyu Sun,Chuanfeng Li,Yuanbo Li 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.8

In the process of coverage for multiple targets, due to the existence of a large number of redundant data make the effective monitoring area coverage decreased and force the network to consume more energy. Therefore, this paper proposes a multi-target k-coverage preservation protocol. First of all, establish the affiliation between the sensor nodes and target nodes through the network model, present a method to compute the coverage expected value of the monitoring area; secondly, in the network energy conversion, using scheduling mechanism in sensor nodes to attain the network energy balance, and achieve different network coverage quality through different nodes energy conversion. Finally, simulation results show that NMCP can effectively reduce the number of active nodes meeting certain coverage requirements and then improve the network lifetime.