Efficient Channel State Feedback Scheme for Opportunistic Scheduling in OFDMA Systems by Scheduling Probability Prediction

고수민,이정수,이병기,박대영 한국통신학회 2013 Journal of communications and networks Vol.15 No.6

In this paper, we propose a new feedback scheme calledmode selection-based feedback by scheduling probability prediction(SPP-MF) for channel state feedback in OFDMA downlinksystem. We design the scheme such that it determines the moredesirable feedback mode among selective feedback by schedulingprobability prediction (SPP-SF) mode and bitmap feedbackby scheduling probability prediction (SPP-BF) mode, by calculatingand comparing the throughputs of the two modes. In bothfeedback modes, each user first calculates the scheduling probabilityof each subchannel (i.e., the probability that a user wins thescheduling competition for a subchannel) and then forms a feedbackmessage based on the scheduling probability. Specifically, inthe SPP-SF mode, each user reports the modulation and codingscheme (MCS) levels and indices of its best S subchannels in termsof the scheduling probability. In the SPP-BF mode, each user determinesits scheduling probability threshold. Then, it forms abitmap for the subchannels according to the scheduling probabilitythreshold and sends the bitmap along with the threshold. Numericalresults reveal that the proposed SPP-MF scheme achievessignificant performance gain over the existing feedback schemes.

오프라인 사용자 경험 향상을 위한 대형마트 모바일 애플리케이션 서비스디자인 제안 - 위치기반 서 비스를 중심으로

고수민,김은영 한국기초조형학회 2024 기초조형학연구 Vol.25 No.1

코로나19 팬데믹을 겪으며 소비자의 소비패턴이 오프라인에서 온라인 구매를 선호하는 방향으로 변화하였으며, 이는 오프라인 유통업계에 큰 영향을 끼쳤다. 이제 대형마트는 재래시장 및 타 오프라인유통업계와 경쟁을 하는 것이 아닌, 온라인에 대항할 수 있도록 경쟁력 있는 콘텐츠를 갖추어야 한다. 이에 따라 본 연구는 서비스디자인 방법론을 통해 오프라인 대형마트에서의 사용자 경험 향상을 위한모바일 애플리케이션 서비스디자인 제안을 목적으로 한다. 선행연구 고찰을 통해 오프라인 환경에서의 장점을 극대화시켜 줄 수 있는 기술의 이론을 조사하고, 기존 국내에서 서비스 중인 대형마트 애플리케이션의 현황을 파악하였다. 사용자 조사를 위해 오프라인 대형마트에서의 사용자 경험에 대하여온라인 설문조사를 5일간 진행하였다. 구글 폼 양식을 사용하였으며, 각종 모바일 및 온라인 플랫폼에설문조사 링크를 홍보하는 방법으로 성별과 연령, 지역과 관계없이 대상자를 모집하였으며, 총 251명이 응답하였다. 또한, 정성적 데이터를 기반으로 사용자의 구체적인 페인 포인트와 니즈를 조사하기위해 현장 심층 인터뷰를 진행하였다. 사용자 조사를 통해 도출된 데이터를 기반으로 사용자 경험 특성의 공통점에 따라 키워드를 분류 및 그룹화하였으며, 두 가지 타입의 페르소나를 제작하고 고객 여정 지도를 작성하였다. 이러한 과정에서 서비스 기능에 대한 아이디어를 구체화하고 시스템 기능을 구매 계획 및 마트 입장 단계, 쇼핑 단계, 결제 및 퇴장 단계로 나누어 정리하였다. 이후, 이러한 기능을효율적으로 반영할 수 있는 사용자 인터페이스 디자인을 진행하였다. 본 연구는 오프라인 대형마트를경험해 본 사용자에 대해 정량적·정성적 조사를 병행하여 데이터를 분석하였다. 또한, 서비스디자인방법론을 활용하여 오프라인 대형마트에서의 사용자경험을 향상시킬 수 있는 서비스를 제공함으로써온라인과 대비되는 오프라인의 특성 및 경쟁력을 강화할 수 있는 서비스 제안에 의의가 있다. Through the COVID-19 pandemic, consumers' consumption patterns have shifted towards a preference for online purchases over offline purchases, significantly impacting the offline retail industry. Now, hypermarkets need to focus on developing competitive content to compete online platform, rather than competing with traditional or other offline retail industry. Accordingly, this study aims to propose a mobile application service design to improve the user experience in offline hypermarkets through a service design methodology. Through a review of previous studies, the research investigated theoretical foundations of technologies that can maximize advantages in the offline environment. The status of existing hypermarket applications in Korea was also examined. For user survey, an online survey was conducted for 5 days on user experience in offline hypermarkets. Subjects were recruited from various mobile and online platforms, regardless of gender, age, or region, and a total of 251 people responded. In addition, in-depth on-site interviews were conducted to investigate specific pane points and needs of users based on qualitative data. Based on the data derived from the user survey, keywords were classified and grouped according to the commonalities of user experience characteristics, and two types of personas were produced and customer journey maps were prepared. In this process, the idea of the service function was specified, and the system function was divided into purchase plan, mart entry stage, shopping stage, payment and exit stage. After that, user interface design that can efficiently reflect these functions was conducted. This study analyzed data by conducting quantitative and qualitative surveys on users who have experienced offline hypermarkets. In addition, it is meaningful to propose a service that can strengthen offline characteristics and competitiveness compared to online by providing a service that can improve the user experience in offline hypermarkets by utilizing the service design methodology.

샤스타데이지

고수민 문예운동사 2017 수필시대 Vol.12 No.7·8

대구·경북 폭염 영향예보 기반 구축 및 시범서비스

고수민,김령아,김정희,공상민,김영준,장현식 한국기상학회 2017 한국기상학회 학술대회 논문집 Vol.2017 No.5

기능성 소화불량과 Alexithymia의 연관성

고수민,변재준,이경현 대한가정의학회 2001 Korean Journal of Family Medicine Vol.22 No.8

5단계 자율주행 모빌리티 실내 기능제어 위치 도출을 위한 사용자 경험 디자인 연구 -아이트래킹 실험을 중심으로-

고수민,류민서,이채은,이옥근,박기철 한국기초조형학회 2023 기초조형학연구 Vol.24 No.6

The purpose of this study is to study the user experience design that derives the vehicle function control area according to the position of each seat among the interior seat positions of the 5-stage autonomous driving mobility using an eye tracker. When the environment of the 5th stage of autonomous driving is reached, the driver's activities in the vehicle will increase as soon as he or she escapes from driving. Therefore, the importance of mobility interior design and usability to enhance the user experience of passengers will increase. The operation method and position of functions, convenience devices, and buttons inside the vehicle greatly influence the user experience. Since future mobility interiors can be freely arranged, it is difficult to predict seat positions and function operation methods and positions. In this study, a new seat position was derived based on previous studies, and based on this, a 1:1 study model was produced by referring to the dimensions of the Hyundai Motor's Staria model. Participants in the experiment were driver license holders in their 20s and 30s, and a total of 15 people participated in the experiment, 7 men (46.6%) and 8 women (53.3%). After the subject was asked to wear a glasses-type eye tracker Toby Pro Glass 3, when sitting in each seat, they were asked to perform the task of operating the function button in the vehicle within the given control area. The subject's eye movement in which the function control area was searched was analyzed using a heat map and a gauge plot method. The result value of what control area the subjects wanted to control each function for each seat was derived. In addition, the difference according to the driving skill level was analyzed by dividing it into two groups according to the driving skill level of the subjects. It is expected that the user trend by seat position according to the function derived through this study can be used as a useful reference for the interior design and space composition of future autonomous driving mobility.

대학생의 창업교육이 창업의지에 미치는 영향 연구: 팀내 전공다양성을 조절효과로 하여

고수민,한유진 한국창업학회 2022 한국창업학회지 Vol.17 No.2

본 연구의 목적은 대학 및 정부가 제공하는 창업교육을 받은 대학생을 대상으로 팀내 전공다양성을 조절변수로 하여 대학생의 창업교육이 창업의지에 미치는 영향을 분석하는 것이다. 조사목적과 연구범위를 고려하여 창업교육을 받은 대학생들의 설문응답을 최종 표본으로 활용하였으며, 다중회귀분석하였다. 연구 결과 교육 참여 동기의 하위요인인 활동지향형 동기, 창업가 역량의 하위요인인 기회인식 역량, 멘토링 기능의 하위요인인 역할모델 기능이 전공다양성을 조절효과로 하여 창업의지에 정의 영향을 미치는 것으로 나타났다. 반면, 교육 만족도는 전공다양성을 조절효과로 하여 창업의지에 부의 영향을 미치는 것으로 나타났다. 본 연구는 Teachman 수식을 활용하여 선행연구에서 미비하게 다루었던 전공다양성을 측정하였고, 창업팀 내 전공다양성이 대학생의 창업의지를 증가시킨다는 실증적 증거를 제시했다는 점에서 의의를 가진다. 대학을 중심으로 한 창업생태계 선순환을 위하여, 본 연구를 기반으로 한 대학생 창업 교육이 활성화되기를 기대한다.

OFDMA 시스템에서 스케줄링 확률 예측을 이용한 채널 상태 피드백 감소 기법

고수민(Soomin Ko),박대영(Daeyoung Park),이병기(Byeong Gi Lee) 한국통신학회 2011 한국통신학회 학술대회논문집 Vol.2011 No.6

20대 여성의 일반적 특성에 따른 피부건강관리 인식과 실천행위

고수민 ( Su-min Go ),최미옥 ( Mee-ok Choi ) 한국미용학회 2021 한국미용학회지 Vol.27 No.6

This study was conducted to study skin health care awareness and practices for women in their 20s who are highly interested in skin health care. From December 1, 2020, to February 1, 2021, women in their 20s who are currently living in Jinju-si Gyeongsangnam-do and Gwangju, and the study were surveyed using the Internet and SNS, and a total of 300 copies were used as final analysis data. The specific questionnaire consisted of a total of 40 items. Data analysis was conducted using the SPSWIN 21.0 program. First, in the difference between skin health care awareness and skin health care practice behavior according to general characteristics, age ‘26-29 years old’, marriage status ‘unmarried’, final education ‘university student/graduation’, occupation ‘student’, and monthly beauty-related expenses ‘less than 10-130,000 won’ drinking alcohol ‘1-2 times a week’ was the highest, and for the smoking, non-smoking women were the highest. Regarding skin health care awareness according to general characteristics, the overall average was 3.82, ‘harmful factors’ appeared to be the highest, and for the skin health care practice behavior, the overall average was 3.43, showing the highest average in ‘cosmetics selection’, and the difference in skin health care awareness according to age, educational background, and smoking was significant. In response, in this study, it is intended to be used as basic data to help maintain and improve skin health by grasping problems such as awareness of skin health care and practice behavior of women in their 20s.

복부비만에 활용되는 침치료에 대한 국내외 연구동향

고수민(Su-Min Koh),송미연(Mi-Yeon Song),정원석(Won-Seok Chung),김현석(Hyungsuk Kim),신우철(Woo-Chul Shin),김세윤(Seyun Kim),서준원(Joonwon Seo),조재흥(Jae-Heung Cho) 한방비만학회 2023 한방비만학회지 Vol.23 No.2