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일반화 적응 심층 잠재요인 추천모형 (A Generalized Adaptive Deep Latent Factor Recommendation Model)

  • 김정하;이지평;장성현;조윤호
    • 지능정보연구
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    • 제29권1호
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    • pp.249-263
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    • 2023
  • 대표적인 추천 시스템 방법론인 협업 필터링(Collaborative Filtering)에는 이웃기반 방법(Neighbor Methods)과 잠재 요인 모델(Latent Factor model)이라는 두 가지 접근법이 있다. 이중 행렬 분해(Matrix Factorization)를 이용하는 잠재 요인 모델은 사용자-아이템 상호작용 행렬을 두 개의 보다 낮은 차원의 직사각형 행렬로 분해하고 이들의 행렬 곱으로 아이템의 평점(Rating)을 예측한다. 평점 패턴으로부터 추출된 요인 벡터들을 통해 사용자와 아이템 속성을 포착할 수 있기 때문에 확장성, 정확도, 유연성 측면에서 이웃기반 방법보다 우수하다고 알려져 있다. 하지만 평점이 지정되지 않은 아이템에 대해서는 선호도가 다른 개개인의 다양성을 반영하지 못하는 근본적인 한계가 있고 이는 반복적이고 부정확한 추천을 초래하게 된다. 이러한 잠재요인 모델의 한계를 개선하고자 각각의 아이템 별로 사용자의 선호도를 적응적으로 학습하는 적응 심층 잠재요인 모형(Adaptive Deep Latent Factor Model; ADLFM)이 등장하였다. ADLFM은 아이템의 특징을 설명하는 텍스트인 아이템 설명(Item Description)을 입력으로 받아 사용자와 아이템의 잠재 벡터를 구하고 어텐션 스코어(Attention Score)를 활용하여 개인의 다양성을 반영할 수 있는 방법을 제시한다. 하지만 아이템 설명을 포함하는 데이터 셋을 요구하기 때문에 이 방법을 적용할 수 있는 대상이 많지 않은 즉 일반화에 있어 한계가 있다. 본 연구에서는 아이템 설명 대신 추천시스템에서 보편적으로 사용하는 아이템 ID를 입력으로 하고 Self-Attention, Multi-head attention, Multi-Conv1d 등 보다 개선된 딥러닝 모델 구조를 적용함으로써 ADLFM의 한계를 개선할 수 있는 일반화된 적응 심층 잠재요인 추천모형 G-ADLFRM을 제안한다. 다양한 도메인의 데이터셋을 가지고 입력과 모델 구조 변경에 대한 실험을 진행한 결과, 입력만 변경했을 경우 동반되는 정보손실로 인해 ADLFM 대비 MAE(Mean Absolute Error)가 소폭 높아지며 추천성능이 하락했지만, 처리할 정보량이 적어지면서 epoch 당 평균 학습속도는 대폭 향상되었다. 입력 뿐만 아니라 모델 구조까지 바꿨을 경우에는 가장 성능이 우수한 Multi-Conv1d 구조가 ADLFM과 유사한 성능을 나타내며 입력변경으로 인한 정보손실을 충분히 상쇄시킬 수 있음을 보여주었다. 결론적으로 본 논문에서 제시한 모형은 기존 ADLFM의 성능은 최대한 유지하면서 빠른 학습과 추론이 가능하고(경량화) 다양한 도메인에 적용할 수 있는(일반화) 새로운 모형임을 알 수 있다.

블록체인 기반 공연영상 공공 플랫폼 구축 사례 연구: 경기도 뉴미디어 예술방송국 경기아트온을 중심으로 (A case study of blockchain-based public performance video platform establishment: Focusing on Gyeonggi Art On, a new media art broadcasting station in Gyeonggi-do)

  • 이승현
    • 서비스연구
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    • 제13권1호
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    • pp.108-126
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    • 2023
  • 본 연구는 경기도 뉴미디어 예술방송국 경기아트온 구축 사례를 통해 블록체인 기반 문화예술공연 영상 플랫폼의 지속가능성을 탐색적으로 고찰하고, 블록체인을 활용한 영상콘텐츠 거래의 기술적 한계와 법·제도적 쟁점을 검토하였다. 연구방법은 개발자 및 운영자 심층인터뷰, 회의참여 등 참여관찰의 방법으로 진행하였다. 연구자는 블록체인 기반 공연영상 플랫폼 구축을 위한 KT와 경기아트센터의 컨소시엄 협약 단계부터 블록체인 노드, 스마트 콘트랙트, API, UI/UX 설계 및 개발, 블록체인과 콘텐츠 유통 서비스 연동 테스트 수행까지 전 과정에 참여관찰하였다. 연구문제1: '블록체인 기반 공연영상 콘텐츠 유통 공공 플랫폼에 적합한 기술 모델은 어떠한 모델인가?'에 대한 연구결과, 첫째, 블록체인 기반 예술공연 영상콘텐츠 유통 공공 플랫폼에 적합한 블록체인 형태는 블록체인 관리자가 직접 초대해야 개입이 가능한 프라이빗 형태가 적합한 것으로 판단되었다. 둘째, 경기아트온과 같은 공공 플랫폼에서는 NFT 발행 기반 예술인 저작권 관리 모델과 BC토큰과 클라우드 기반 콘텐츠 유통 모델 중 API를 통해 외부 수요기관에 콘텐츠를 제공하고 사용료 정산에 K-토큰을 사용하는 모델이 적합한 것으로 분석되었다. 셋째, 경기아트온과 같은 공공 플랫폼 초기 서비스는 콘텐츠 이용 권한을 부여된 이용자에게만 서비스를 제공하는 폐쇄형 블록체인이 적합하다는 결론에 이르렀다. 연구문제2: '블록체인 기반 공연영상 유통 공공 플랫폼 운영 시 어떠한 법·제도적 문제점을 검토해야 하는가?' 에 대한 연구결과, 첫째, 블록체인 기반의 스마트 계약은 거래 당사자들의 신원이 드러나지 않을 수 있는 블록체인 기술의 특성상 당사자 적격성 문제, 둘째, 블록체인은 보안사고가 발생하면 사용자의 손실 배상이나 구제방법이 불분명하여 손실회복이 어렵다는 문제, 셋째, 스마트 계약은 채무불이행이라는 개념이 적용될 수 없고, 스마트 계약상의 채무가 이미 이행이 이루어진 경우에도 불완전이행의 소지를 검토하여야 하는 것으로 분석되었다.

다중 계층 웹 필터를 사용하는 웹 애플리케이션 방화벽의 설계 및 구현 (Design and Implementation of a Web Application Firewall with Multi-layered Web Filter)

  • 장성민;원유헌
    • 한국컴퓨터정보학회논문지
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    • 제14권12호
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    • pp.157-167
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    • 2009
  • 최근 인터넷 상에서 빈번하게 발생하는 내부 정보와 개인 정보 유출과 같은 보안 사고들은 보안을 고려하지 않고 개발된 웹 애플리케이션의 취약점을 이용하는 방법으로 빈번하게 발생한다. 웹 애플리케이션의 공격들에 대한 탐지는 기존의 방화벽과 침입 탐지 시스템들의 공격 탐지 방법으로는 탐지가 불가능하며 서명기반의 침입 탐지 방법으로는 새로운 위협과 공격에 대한 탐지에 한계가 있다. 따라서 웹 애플리케이션 공격 탐지 방법에 대한 많은 연구들이 웹 트래픽 분석을 이동하는 비정상행위 기반 탐지 방법을 이용하고 있다. 비정상행위 탐지 방법을 사용하는 최근의 웹 방화벽에 관한 연구들은 웹 트래픽의 정확한 분석 방법, 패킷의 애플리케이션 페이로드 검사로 인한 성능 문제 개선, 그리고 다양한 네트워크 보안장비들의 도입으로 발생하는 통합관리 방법과 비용 문제 해결에 중점을 두고 있다. 이를 해결하기 위한 방법으로 통합 위협 관리 시스템이 등장 하였으나 부족한 웹 보안 기능과 높은 도입 비용으로 최근의 애플리케이션 공격들에 대해 정확한 대응을 하지 못하고 있는 현실이다. 본 연구에서는 이러한 문제점들을 해결하기 위해 웹 클라이언트의 요청에 포함된 파라미터 값의 길이에 대한 실시간 분석을 이용하여 공격 가능성을 탐지하는 비정상행위 탐지방법을 제안하고, 애플리케이션 데이터 검사로 발생하는 성능 저하 문제를 해결할 수 있는 다중 계층 웹 필터를 적용한 웹 애플리케이션 방화벽 시스템을 설계하고 구현하였다. 제안된 시스템은 저가의 시스템이나 레거시 시스템에 적용 가능하도록 설계하여 추가적인 보안장비 도입으로 야기되는 비용 문제를 해결할 수 있도록 하였다.

겸재 정선(謙齋 鄭敾) <청담도(淸潭圖)>의 실재(實在)와 작의(作意) (The Existence and Design Intention of Jeong Seon's True-View Landscape Painting <Cheongdamdo(淸潭圖)>)

  • 송석호;조장빈;심우경
    • 헤리티지:역사와 과학
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    • 제56권2호
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    • pp.172-203
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    • 2023
  • <청담도(淸潭圖)>는 겸재 정선(謙齋 鄭敾, 1676~1759)이 영조 32년(1756)에 삼각산(三角山) 청담(淸潭) 지역을 유람하고 그린 병풍도(屛風圖) 형식의 진경산수화(眞境山水畫)로 본 연구를 통해 발굴되었다. 와운루(卧雲樓)와 농월루(弄月樓)로 구성된 청담별업(淸潭別業)은 노론 낙론계(洛論系) 문회와 백악시단(白嶽詩壇)의 시회가 열린 당대 문화예술 활동의 거점이며, 정선과 그림의 주문자 홍상한(洪象漢, 1701~1769)의 연결점이 된다. <청담도>는 1756년 가을비가 내릴 당시, 정선이 그의 제자 김희성(金喜誠, 1723~1769)과 청담에 막 도착하여 홍상한과 만났을 때를 회상하면서 그린 그림이다. 인수봉(仁壽峰)부터 동구(洞口)까지 굽이쳐 흐르는 골짜기를 주안에 두고 그려졌으며, 청담 지역의 전경을 담으면서도 동(洞)의 유래가 되는 경물(景物) 청담(淸潭)을 강조하는 중의적인 화제를 사용하였다. 과감한 쇄찰(刷擦)과 습윤한 피마준(披麻皴), 부드러운 미점(米點)의 표현, 세밀한 필선 등은 정선 노년의 절정에 이른 원숙함을 보여준다. 특히, 암산(巖山)과 토산(土山)의 대비와 개수의 대칭을 고려하여 음양(陰陽)의 조화를 꾀한 점은 『주역(周易)』에 능통했던 정선이 유람의 최종단계에서 보였던 특유의 진경술(眞境術)로 보았다. 어유봉의 「청담동부기(淸潭洞府記)」는 정선이 청담의 진경을 파악하고 별업정원에 설정된 주요 경물의 물성(物性)을 이해하는 것에 영향을 주었다. 정선이 현장과 차별되도록 그린 별업정원의 특징으로는 수구막이 바위를 변용하고 과장하여 수구를 억눌렀고, 비보림(裨補林)을 치밀하게 조성하여 별업을 가렸으며, 특정 경물의 기능이 발휘되도록 새로운 물체를 창안하였다. 또한, 두 그루 나무를 기울여 대문처럼 정원을 닫고 있으며, 외원과 내원의 경계가 되는 인공의 조산대(造山帶)를 긴 담장처럼 견고하게 조성하여 내청룡과 내백호를 연결하였다. 이는 정선이 청담별업의 부족한 입지를 명당으로 만들기 위해 구사한 비보염승술(裨補厭勝術)로, 풍수적인 묘책으로 고안된 진경술의 일단으로 해석되며, 현실에서는 이루기 어렵지만 그림으로는 가능했던 이상적인 전통조경의 도상학적 구현을 잘 보여준다.

소비가치와 소비자의 인지욕구가 온라인 쇼핑 웹사이트에 대한 신뢰성을 매개로 만족도에 미치는 영향 (The Effect of Consumption Value and Consumers' Need for Cognition on Satisfaction through the Mediating Role of Trust in Online Shopping Websites)

  • 이윤선
    • 벤처혁신연구
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    • 제6권4호
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    • pp.99-111
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    • 2023
  • 본 연구는 온라인 쇼핑 웹사이트에 대한 소비자의 만족도가 과거와는 다른 현상으로 변화됨을 확인하고자 한다. 즉, 팬데믹 이후 전 세계적으로 이커머스(e-commerce)의 이용이 확대되고, 모바일커머스, 소셜커머스 등 다양한 형태의 커머스가 형성화되는 상황에서, 소비자의 정보처리과정과 의사결정과정은 소비자가 지각하는 소비가치와 개인적 특성에 따라 새로운 환경에 의해 소비자의 지각된 동기수준에 기반하여 변화된 행동을 살펴보는데 연구의 의의가 있다. 즉, 소비가치와 소비자의 인지욕구가 웹사이트에 대한 신뢰성의 매개역할로 온라인 웹사이트의 만족도에 미치는 영향에 대해 조사하고자 한다. 가설 1을 검증한 결과 웹사이트에 대한 소비자의 감각적 가치뿐 아니라 실용적 가치는 웹사이트의 만족도에 긍정적인 영향력을 미치며, 특히 실용적 가치가 상대적으로 감각적 가치보다 더 큰 영향력을 나타냈다. 다만, 소비자의 인지욕구와 만족도 간에는 부(-)의 관계를 단측검증 하에 유의한 수준으로 나타났다. 가설 2에서는 2-1인 소비가치 중 실용적 가치 만이 웹사이트에 대한 신뢰성을 매개로 만족도에 긍정적인 영향을 나타냈다. 웹사이트의 만족도에 소비가치 중 실용적 가치가 중요한 요인임을 확인할 수 있었다. 이전 연구결과와는 다르게 소비가치가 감각, 감정에 기반하는 가치뿐 아니라 실용적 소비가치가 더 큰 영향력을 가졌다는 점이 본 연구의 의의라 하겠다. 따라서 소비자가 이용하는 웹사이트의 신뢰성을 기반으로 매개역할을 한다면 실용적 가치와 인지욕구가 만족도에 더욱 강하게 영향력을 주는 것이다. 이러한 연구결과는 온라인으로 소비를 하게 된 현 시장의 트렌드가 반영된 결과이며, 본 연구결과를 통해 소비자의 행동 이해와 주요 요인들을 기반으로 온라인 웹사이트의 관리 및 운영 전략에 도움이 되리라 본다.

포토보이스(Photovoice) 기법을 활용한 소비자의 친환경 행동에 대한 연구 : Focus Group Study (A Study on Consumer Eco-friendly Behavior Utilizing the Photovoice Methodology : Focus Group Study)

  • 이일한
    • 벤처혁신연구
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    • 제6권4호
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    • pp.63-81
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    • 2023
  • 본 연구의 목적은 대학교 재학생을 대상으로 포토보이스 질적 연구방법을 활용하여 대학생이 인지하는 환경, 환경장벽, 친환경 행동의 모습을 파악하고자 하였다. 포토보이스 방법론을 활용하여 대학생의 시각으로 바라본 친환경행동의 동인과 행동의 모습을 공유하고 그에 관한 의미를 고찰하는 과정을 통해 친환경행동의 실천적 방안을 제시하고자 하였다. 환경이라는 대 주제 하에 참여자들이 직접 선정하여 다루게 된 3가지 하위 주제는 '내가 생각하는 환경이란', '나에게 환경장벽이란', 그리고 '나의 친환경 행동이란' 등으로 주제별 참여자가 일상생활 중 직접 촬영하여 선별한 사진을 통하여 자신의 생각을 표현하고 타인의 의견을 청취하여 공유하였다. 이러한 연구의 결과는 첫째, 연구 참여자들은 환경에 대하여 '낭비', '불편함', '미세먼지=환경오염', '위선태도' 등으로 직접 촬영하여 선정한 사진의 의미를 부여하였다. 둘째, 연구 참여자들은 환경장벽에 대하여 '비가시성', '무관심', '사회적시선', '비효율성', '강제성' 등으로 선택된 사진의 의미를 부여하였다. 마지막으로, 연구 참여자들은 친환경행동에 대하여 '리사이클', '에너지절약', '재사용' '일회용품 사용 줄이기' 등으로 선택된 사진을 의미화 하였다. 이러한 연구결과를 바탕으로 V-A-B모델의 확인과 소비자는 개인이 가진 가치와 태도, 그리고 행동이 위계관계를 구성한다는 점을 확인하였으며, 소비자의 일상생활에서 친환경 행동을 실천하는데 방해 요인이 분명 존재하고 있으며, 친환경적 소비 행동을 실천하기 위한 불편함 혹은 비편리성을 해소할 수 있는 방안이 필요하다는 연구의 시사점를 제시하였다.

창업자의 앙트레프레니얼 마케팅 지향성이 경영성과에 미치는 영향: 조직내 마케팅역량의 매개효과 (A Study on the Effects of Entrepreneurial Marketing Orientation on the Management Performance: Mediated Effect of Organizational Marketing Capabilities)

  • 변홍주;변충규;하환호
    • 벤처창업연구
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    • 제17권4호
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    • pp.87-100
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    • 2022
  • 창업초기기업은 자원 부족이라는 생래적 한계를 지니고 있다. 이러한 한계로 인해 창업자는 기업가정신을 기반으로 조직을 끊임없이 변화시켜가며 기회를 탐색하고 위험을 관리하며 기업을 성장시켜 나가고자 노력한다. 즉 창업자가 제한된 자원으로 새로운 성과를 추구하는 과정에서 앙트레프레니얼 마케팅 개념이 등장했다. 앙트레프레니얼마케팅에 대한 연구가 30여 년간 지속되고 있음에도 불구하고 국내에서는 아직 연구가 활성화되지 않고 있다. 이에 본 연구에서는 먼저 앙트레프레니얼마케팅에 대한 이론과 연구성과들을 정리를 하였으며, 이를 바탕으로 앙트레프레니얼마케팅 지향성과 마케팅역량, 경영성과 간의 영향 관계를 밝히는 실증연구의 필요성을 제시하였다. 이후 앙트레프레니얼마케팅 지향성이 조직의 마케팅역량을 거쳐 경영성과에 이르는 일련의 과정과 그 효과를 가설로 제시하였다. 실증연구를 위해 220개 기업의 창업자들을 대상으로 설문조사를 실시하였고, 이후 구조방정식을 이용한 경로분석을 통해 가설검정을 하였다. 연구결과는 다음과 같다. 첫째, 스타트업의 앙트레프레니얼마케팅 지향성은 조직의 마케팅역량과 경영성과 모두에 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 조직의 마케팅역량 역시 경영성과에 정(+)의 영향을 미치는 것으로 나타났다. 셋째, 앙트레프레니얼마케팅 지향성과 경영성과의 관계에 대한 조직의 마케팅역량의 매개효과를 실증분석한 결과, 마케팅 전문성이 재무적 성과보다 비재무적 성과에 더 큰 매개효과를 나타내는 것으로 나타났다. 한편, 마케팅 수행능력은 비재무성과보다 재무성과에 더 강한 매개적 영향을 미치는 것으로 확인되었다. 본 연구는 그동안 학술적 공백이었던 국내 창업기업에 적합한 앙트레프레니얼마케팅 지향성 개념과 구성요인을 실증분석을 통하여 확인하였다는 점에서 학문적 의의가 크다. 아울러 본 연구는 진취성과 위험관리능력, 혁신성, 기회지향, 자원활용, 고객집중성 6가지 요인으로 앙트레프레니얼마케팅 지향성의 구성요인을 확인하고, 이들이 조직의 마케팅역량을 매개로 경영성과에 미치는 영향을 검증하였다는 점에서 연구의 차별성이 있다. 이와 더불어 본 연구는 초기창업자들에게 앙트레프레니얼마케팅 지향적인 사고의 중요성을 알려준다는 점에서 실무적 의의가 있다. 특히 본 연구의 결과는 중소기업 창업자들이 시장분석 능력을 최적화하고, 다양한 이해관계자와 네트워킹하고, 마케팅역량을 발휘할 수 있는 조직의 역량을 높이는 데 도움을 줄 것이다.

쇼핑 가치 추구 성향에 따른 쇼핑 목표와 공유 의도 차이에 관한 연구 - 전자제품 구매고객을 중심으로 (Shopping Value, Shopping Goal and WOM - Focused on Electronic-goods Buyers)

  • 박경원;박주영
    • 마케팅과학연구
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    • 제19권2호
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    • pp.68-79
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    • 2009
  • The interplay between hedonic and utilitarian attributes has assumed special significance in recent years; it has been proposed that consumption offerings should be viewed as experiences that stimulate both cognitions and feelings rather than as mere products or services. This research builds on previous work on hedonic versus utilitarian benefits, regulatory focus theory, customer satisfaction to address two question: (1) Is the shopping goal at the point of purchase different from the shopping value? and (2) Is the customer loyalty after the use different from the shopping value and shopping goal? We surveyed 345 peoples those who have bought the electronic-goods within 6 months. This research dealt with the shopping value which is consisted of 2 types, hedonic and utilitarian. Those who pursue the hedonic shopping value may prefer the pleasure of purchasing experience to the product itself. They tend to prefer atmosphere, arousal of the shopping experience. Consistent with previous research, we use the term "hedonic" to refer to their aesthetic, experiential and enjoyment-related value. On the contrary, Those who pursue the utilitarian shopping value may prefer the reasonable buying. It may be more functional. Consistent with previous research, we use the term "utilitarian" to refer to the functional, instrumental, and practical value of consumption offerings. Holbrook(1999) notes that consumer value is an experience that results from the consumption of such benefits. In the context of cell phones for example, the phone's battery life and sound volume are utilitarian benefits, whereas aesthetic appeal from its shape and color are hedonic benefits. Likewise, in the case of a car, fuel economics and safety are utilitarian benefits whereas the sunroof and the luxurious interior are hedonic benefits. The shopping goals are consisted of the promotion focus goal and the prevention focus goal, based on the self-regulatory focus theory. The promotion focus is characterized into focusing ideal self because they are oriented to wishes and vision. The promotion focused individuals are tend to be more risk taking. They are more sensitive to hope and achievement. On the contrary, the prevention focused individuals are characterized into focusing the responsibilities because they are oriented to safety. The prevention focused individuals are tend to be more risk avoiding. We wanted to test the relation among the shopping value, shopping goal and customer loyalty. Customers show the positive or negative feelings comparing with the expectation level which customers have at the point of the purchase. If the result were bigger than the expectation, customers may feel positive feeling such as delight or satisfaction and they would want to share their feelings with other people. And they want to buy those products again in the future time. There is converging evidence that the types of goals consumers expect to be fulfilled by the utilitarian dimension of a product are different from those they seek from the hedonic dimension (Chernev 2004). Specifically, whereas consumers expect the fulfillment of product prevention goals on the utilitarian dimension, they expect the fulfillment of promotion goals on the hedonic dimension (Chernev 2004; Chitturi, Raghunathan, and Majahan 2007; Higgins 1997, 2001) According to the regulatory focus theory, prevention goals are those that ought to be met. Fulfillment of prevention goals in the context of product consumption eliminates or significantly reduces the probability of a painful experience, thus making consumers experience emotions that result from fulfillment of prevention goals such as confidence and securities. On the contrary, fulfillment of promotion goals are those that a person aspires to meet, such as "looking cool" or "being sophisticated." Fulfillment of promotion goals in the context of product consumption significantly increases the probability of a pleasurable experience, thus enabling consumers to experience emotions that result from the fulfillment of promotion goals. The proposed conceptual framework captures that the relationships among hedonic versus utilitarian shopping values and promotion versus prevention shopping goals respectively. An analysis of the consequence of the fulfillment and frustration of utilitarian and hedonic value is theoretically worthwhile. It is also substantively relevant because it helps predict post-consumption behavior such as the promotion versus prevention shopping goals orientation. Because our primary goal is to understand how the post consumption feelings influence the variable customer loyalty: word of mouth (Jacoby and Chestnut 1978). This research result is that the utilitarian shopping value gives the positive influence to both of the promotion and prevention goal. However the influence to the prevention goal is stronger. On the contrary, hedonic shopping value gives influence to the promotion focus goal only. Additionally, both of the promotion and prevention goal show the positive relation with customer loyalty. However, the positive relation with promotion goal and customer loyalty is much stronger. The promotion focus goal gives the influence to the customer loyalty. On the contrary, the prevention focus goal relates at the low level of relation with customer loyalty than that of the promotion goal. It could be explained that it is apt to get framed the compliment of people into 'gain-non gain' situation. As the result, for those who have the promotion focus are motivated to deliver their own feeling to other people eagerly. Conversely the prevention focused individual are more sensitive to the 'loss-non loss' situation. The research result is consistent with pre-existent researches. There is a conceptual parallel between necessities-needs-utilitarian benefits and luxuries-wants-hedonic benefits (Chernev 2004; Chitturi, Raghunathan and Majaha 2007; Higginns 1997; Kivetz and Simonson 2002b). In addition, Maslow's hierarchy of needs and the precedence principle contends luxuries-wants-hedonic benefits higher than necessities-needs-utilitarian benefits. Chitturi, Raghunathan and Majaha (2007) show that consumers are focused more on the utilitarian benefits than on the hedonic benefits of a product until their minimum expectation of fulfilling prevention goals are met. Furthermore, a utilitarian benefit is a promise of a certain level of functionality by the manufacturer or the retailer. When the promise is not fulfilled, customers blame the retailer and/or the manufacturer. When negative feelings are attributable to an entity, customers feel angry. However in the case of hedonic benefit, the customer, not the manufacturer, determines at the time of purchase whether the product is stylish and attractive. Under such circumstances, customers are more likely to blame themselves than the manufacturer if their friends do not find the product stylish and attractive. Therefore, not meeting minimum utilitarian expectations of functionality generates a much more intense negative feelings, such as anger than a less intense feeling such as disappointment or dissatisfactions. The additional multi group analysis of this research shows the same result. Those who are unsatisfactory customers who have the prevention focused goal shows higher relation with WOM, comparing with satisfactory customers. The research findings in this article could have significant implication for the personal selling fields to increase the effectiveness and the efficiency of the sales such that they can develop the sales presentation strategy for the customers. For those who are the hedonic customers may be apt to show more interest to the promotion goal. Therefore it may work to strengthen the design, style or new technology of the products to the hedonic customers. On the contrary for the utilitarian customers, it may work to strengthen the price competitiveness. On the basis of the result from our studies, we demonstrated a correspondence among hedonic versus utilitarian and promotion versus prevention goal, WOM. Similarly, we also found evidence of the moderator effects of satisfaction after use, between the prevention goal and WOM. Even though the prevention goal has the low level of relation to WOM, those who are not satisfied show higher relation to WOM. The relation between the prevention goal and WOM is significantly different according to the satisfaction versus unsatisfaction. In addition, improving the promotion emotions of cheerfulness and excitement and the prevention emotion of confidence and security will further improve customer loyalty. A related potential further research could be to examine whether hedonic versus utilitarian, promotion versus prevention goals improve customer loyalty for services as well. Under the budget and time constraints, designers and managers are often compelling to choose among various attributes. If there is no budget or time constraints, perhaps the best solution is to maximize both hedonic and utilitarian dimension of benefits. However, they have to make trad-off process between various attributes. For the designers and managers have to keep in mind that without hedonic benefit satisfaction of the product it may hard to lead the customers to the customer loyalty.

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Information Privacy Concern in Context-Aware Personalized Services: Results of a Delphi Study

  • Lee, Yon-Nim;Kwon, Oh-Byung
    • Asia pacific journal of information systems
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    • 제20권2호
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    • pp.63-86
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    • 2010
  • Personalized services directly and indirectly acquire personal data, in part, to provide customers with higher-value services that are specifically context-relevant (such as place and time). Information technologies continue to mature and develop, providing greatly improved performance. Sensory networks and intelligent software can now obtain context data, and that is the cornerstone for providing personalized, context-specific services. Yet, the danger of overflowing personal information is increasing because the data retrieved by the sensors usually contains privacy information. Various technical characteristics of context-aware applications have more troubling implications for information privacy. In parallel with increasing use of context for service personalization, information privacy concerns have also increased such as an unrestricted availability of context information. Those privacy concerns are consistently regarded as a critical issue facing context-aware personalized service success. The entire field of information privacy is growing as an important area of research, with many new definitions and terminologies, because of a need for a better understanding of information privacy concepts. Especially, it requires that the factors of information privacy should be revised according to the characteristics of new technologies. However, previous information privacy factors of context-aware applications have at least two shortcomings. First, there has been little overview of the technology characteristics of context-aware computing. Existing studies have only focused on a small subset of the technical characteristics of context-aware computing. Therefore, there has not been a mutually exclusive set of factors that uniquely and completely describe information privacy on context-aware applications. Second, user survey has been widely used to identify factors of information privacy in most studies despite the limitation of users' knowledge and experiences about context-aware computing technology. To date, since context-aware services have not been widely deployed on a commercial scale yet, only very few people have prior experiences with context-aware personalized services. It is difficult to build users' knowledge about context-aware technology even by increasing their understanding in various ways: scenarios, pictures, flash animation, etc. Nevertheless, conducting a survey, assuming that the participants have sufficient experience or understanding about the technologies shown in the survey, may not be absolutely valid. Moreover, some surveys are based solely on simplifying and hence unrealistic assumptions (e.g., they only consider location information as a context data). A better understanding of information privacy concern in context-aware personalized services is highly needed. Hence, the purpose of this paper is to identify a generic set of factors for elemental information privacy concern in context-aware personalized services and to develop a rank-order list of information privacy concern factors. We consider overall technology characteristics to establish a mutually exclusive set of factors. A Delphi survey, a rigorous data collection method, was deployed to obtain a reliable opinion from the experts and to produce a rank-order list. It, therefore, lends itself well to obtaining a set of universal factors of information privacy concern and its priority. An international panel of researchers and practitioners who have the expertise in privacy and context-aware system fields were involved in our research. Delphi rounds formatting will faithfully follow the procedure for the Delphi study proposed by Okoli and Pawlowski. This will involve three general rounds: (1) brainstorming for important factors; (2) narrowing down the original list to the most important ones; and (3) ranking the list of important factors. For this round only, experts were treated as individuals, not panels. Adapted from Okoli and Pawlowski, we outlined the process of administrating the study. We performed three rounds. In the first and second rounds of the Delphi questionnaire, we gathered a set of exclusive factors for information privacy concern in context-aware personalized services. The respondents were asked to provide at least five main factors for the most appropriate understanding of the information privacy concern in the first round. To do so, some of the main factors found in the literature were presented to the participants. The second round of the questionnaire discussed the main factor provided in the first round, fleshed out with relevant sub-factors. Respondents were then requested to evaluate each sub factor's suitability against the corresponding main factors to determine the final sub-factors from the candidate factors. The sub-factors were found from the literature survey. Final factors selected by over 50% of experts. In the third round, a list of factors with corresponding questions was provided, and the respondents were requested to assess the importance of each main factor and its corresponding sub factors. Finally, we calculated the mean rank of each item to make a final result. While analyzing the data, we focused on group consensus rather than individual insistence. To do so, a concordance analysis, which measures the consistency of the experts' responses over successive rounds of the Delphi, was adopted during the survey process. As a result, experts reported that context data collection and high identifiable level of identical data are the most important factor in the main factors and sub factors, respectively. Additional important sub-factors included diverse types of context data collected, tracking and recording functionalities, and embedded and disappeared sensor devices. The average score of each factor is very useful for future context-aware personalized service development in the view of the information privacy. The final factors have the following differences comparing to those proposed in other studies. First, the concern factors differ from existing studies, which are based on privacy issues that may occur during the lifecycle of acquired user information. However, our study helped to clarify these sometimes vague issues by determining which privacy concern issues are viable based on specific technical characteristics in context-aware personalized services. Since a context-aware service differs in its technical characteristics compared to other services, we selected specific characteristics that had a higher potential to increase user's privacy concerns. Secondly, this study considered privacy issues in terms of service delivery and display that were almost overlooked in existing studies by introducing IPOS as the factor division. Lastly, in each factor, it correlated the level of importance with professionals' opinions as to what extent users have privacy concerns. The reason that it did not select the traditional method questionnaire at that time is that context-aware personalized service considered the absolute lack in understanding and experience of users with new technology. For understanding users' privacy concerns, professionals in the Delphi questionnaire process selected context data collection, tracking and recording, and sensory network as the most important factors among technological characteristics of context-aware personalized services. In the creation of a context-aware personalized services, this study demonstrates the importance and relevance of determining an optimal methodology, and which technologies and in what sequence are needed, to acquire what types of users' context information. Most studies focus on which services and systems should be provided and developed by utilizing context information on the supposition, along with the development of context-aware technology. However, the results in this study show that, in terms of users' privacy, it is necessary to pay greater attention to the activities that acquire context information. To inspect the results in the evaluation of sub factor, additional studies would be necessary for approaches on reducing users' privacy concerns toward technological characteristics such as highly identifiable level of identical data, diverse types of context data collected, tracking and recording functionality, embedded and disappearing sensor devices. The factor ranked the next highest level of importance after input is a context-aware service delivery that is related to output. The results show that delivery and display showing services to users in a context-aware personalized services toward the anywhere-anytime-any device concept have been regarded as even more important than in previous computing environment. Considering the concern factors to develop context aware personalized services will help to increase service success rate and hopefully user acceptance for those services. Our future work will be to adopt these factors for qualifying context aware service development projects such as u-city development projects in terms of service quality and hence user acceptance.

가족계획과 모자보건 통합을 위한 조산원의 투입효과 분석 -서산지역의 개입연구 평가보고- (An Intervention Study on Integration of Family Planning and Maternal/Infant Care Services in Rural Korea)

  • 방숙;한성현;이정자;안문영;이인숙;김은실;김종호
    • Journal of Preventive Medicine and Public Health
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    • 제20권1호
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    • pp.165-203
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    • 1987
  • This project was a service-cum-research effort with a quasi-experimental study design to examine the health benefits of an integrated Family Planning (FP)/Maternal & Child health (MCH) Service approach that provides crucial factors missing in the present on-going programs. The specific objectives were: 1) To test the effectiveness of trained nurse/midwives (MW) assigned as change agents in the Health Sub-Center (HSC) to bring about the changes in the eight FP/MCH indicators, namely; (i)FP/MCH contacts between field workers and their clients (ii) the use of effective FP methods, (iii) the inter-birth interval and/or open interval, (iv) prenatal care by medically qualified personnel, (v) medically supervised deliveries, (vi) the rate of induced abortion, (vii) maternal and infant morbidity, and (viii) preinatal & infant mortality. 2) To measure the integrative linkage (contacts) between MW & HSC workers and between HSC and clients. 3) To examine the organizational or administrative factors influencing integrative linkage between health workers. Study design; The above objectives called for quasi-experimental design setting up a study and control area with and without a midwife. An active intervention program (FP/MCH minimum 'package' program) was conducted for a 2 year period from June 1982-July 1984 in Seosan County and 'before and after' surveys were conducted to measure the change. Service input; This study was undertaken by the Soonchunhyang University in collaboration with WHO. After a baseline survery in 1981, trained nurses/midwives were introduced into two health sub-centers in a rural setting (Seosan county) for a 2 year period from 1982 to 1984. A major service input was the establishment of midwifery services in the existing health delivery system with emphasis on nurse/midwife's role as the link between health workers (nurse aids) and village health workers, and the referral of risk patients to the private physician (OBGY specialist). An evaluation survey was made in August 1984 to assess the effectiveness of this alternative integrated approach in the study areas in comparison with the control area which had normal government services. Method of evaluation; a. In this study, the primary objective was first to examine to what extent the FP/MCH package program brought about changes in the pre-determined eight indicators (outcome and impact measures) and the following relationship was first analyzed; b. Nevertheless, this project did not automatically accept the assumption that if two or more activities were integrated, the results would automatically be better than a non-integrated or categorical program. There is a need to assess the 'integration process' itself within the package program. The process of integration was measured in terms of interactive linkages, or the quantity & quality of contacts between workers & clients and among workers. Intergrative linkages were hypothesized to be influenced by organizational factors at the HSC clinic level including HSC goals, sltrurture, authority, leadership style, resources, and personal characteristics of HSC staff. The extent or degree of integration, as measured by the intensity of integrative linkages, was in turn presumed to influence programme performance. Thus as indicated diagrammatically below, organizational factors constituted the independent variables, integration as the intervening variable and programme performance with respect to family planning and health services as the dependent variable: Concerning organizational factors, however, due to the limited number of HSCs (2 in the study area and 3 in the control area), they were studied by participatory observation of an anthropologist who was independent of the project. In this observation, we examined whether the assumed integration process actually occurred or not. If not, what were the constraints in producing an effective integration process. Summary of Findings; A) Program effects and impact 1. Effects on FP use: During this 2 year action period, FP acceptance increased from 58% in 1981 to 78% in 1984 in both the study and control areas. This increase in both areas was mainly due to the new family planning campaign driven by the Government for the same study period. Therefore, there was no increment of FP acceptance rate due to additional input of MW to the on-going FP program. But in the study area, quality aspects of FP were somewhat improved, having a better continuation rate of IUDs & pills and more use of effective Contraceptive methods in comparison with the control area. 2. Effects of use of MCH services: Between the study and control areas, however, there was a significant difference in maternal and child health care. For example, the coverage of prenatal care was increased from 53% for 1981 birth cohort to 75% for 1984 birth cohort in the study area. In the control area, the same increased from 41% (1981) to 65% (1984). It is noteworthy that almost two thirds of the recent birth cohort received prenatal care even in the control area, indicating that there is a growing demand of MCH care as the size of family norm becomes smaller 3. There has been a substantive increase in delivery care by medical professions in the study area, with an annual increase rate of 10% due to midwives input in the study areas. The project had about two times greater effect on postnatal care (68% vs. 33%) at delivery care(45.2% vs. 26.1%). 4. The study area had better reproductive efficiency (wanted pregancies with FP practice & healthy live births survived by one year old) than the control area, especially among women under 30 (14.1% vs. 9.6%). The proportion of women who preferred the 1st trimester for their first prenatal care rose significantly in the study area as compared to the control area (24% vs 13%). B) Effects on Interactive Linkage 1. This project made a contribution in making several useful steps in the direction of service integration, namely; i) The health workers have become familiar with procedures on how to work together with each other (especially with a midwife) in carrying out their work in FP/MCH and, ii) The health workers have gotten a feeling of the usefulness of family health records (statistical integration) in identifying targets in their own work and their usefulness in caring for family health. 2. On the other hand, because of a lack of required organizational factors, complete linkage was not obtained as the project intended. i) In regards to the government health worker's activities in terms of home visiting there was not much difference between the study & control areas though the MW did more home visiting than Government health workers. ii) In assessing the service performance of MW & health workers, the midwives balanced their workload between 40% FP, 40% MCH & 20% other activities (mainly immunization). However, $85{\sim}90%$ of the services provided by the health workers were other than FP/MCH, mainly for immunizations such as the encephalitis campaign. In the control area, a similar pattern was observed. Over 75% of their service was other than FP/MCH. Therefore, the pattern shows the health workers are a long way from becoming multipurpose workers even though the government is pushing in this direction. 3. Villagers were much more likely to visit the health sub-center clinic in the study area than in the control area (58% vs.31%) and for more combined care (45% vs.23%). C) Organization factors (admistrative integrative issues) 1. When MW (new workers with higher qualification) were introduced to HSC, it was noted that there were conflicts between the existing HSC workers (Nurse aids with less qualification than MW) and the MW for the beginning period of the project. The cause of the conflict was studied by an anthropologist and it was pointed out that these functional integration problems stemmed from the structural inadequacies of the health subcenter organization as indicated below; i) There is still no general consensus about the objectives and goals of the project between the project staff and the existing health workers. ii) There is no formal linkage between the responsibility of each member's job in the health sub-center. iii) There is still little chance for midwives to play a catalytic role or to establish communicative networks between workers in order to link various knowledge and skills to provide better FP/MCH services in the health sub-center. 2. Based on the above findings the project recommended to the County Chief (who has power to control the administrative staff and the technical staff in his county) the following ; i) In order to solve the conflicts between the individual roles and functions in performing health care activities, there must be goals agreed upon by both. ii) The health sub·center must function as an autonomous organization to undertake the integration health project. In order to do that, it is necessary to support administrative considerations, and to establish a communication system for supervision and to control of the health sub-centers. iii) The administrative organization, tentatively, must be organized to bind the health worker's midwive's and director's jobs by an organic relationship in order to achieve the integrative system under the leadership of health sub-center director. After submitting this observation report, there has been better understanding from frequent meetings & communication between HW/MW in FP/MCH work as the program developed. Lessons learned from the Seosan Project (on issues of FP/MCH integration in Korea); 1) A majority or about 80% of the couples are now practicing FP. As indicated by the study, there is a growing demand from clients for the health system to provide more MCH services than FP in order to maintain the achieved small size of family through FP practice. It is fortunate to see that the government is now formulating a MCH policy for the year 2,000 and revising MCH laws and regulations to emphasize more MCH care for achieving a small size family through family planning practice. 2) Goal consensus in FP/MCH shouBd be made among the health workers It administrators, especially to emphasize the need of care of 'wanted' child. But there is a long way to go to realize the 'real' integration of FP into MCH in Korea, unless there is a structural integration FP/MCH because a categorical FP is still first priority to reduce the rate of population growth for economic reasons but not yet for health/welfare reasons in practice. 3) There should be more financial allocation: (i) a midwife should be made available to help to promote the MCH program and coordinate services, (in) there should be a health sub·center director who can provide leadership training for managing the integrated program. There is a need for 'organizational support', if the decision of integration is made to obtain benefit from both FP & MCH. In other words, costs should be paid equally to both FP/MCH. The integration slogan itself, without the commitment of paying such costs, is powerless to advocate it. 4) Need of management training for middle level health personnel is more acute as the Government has already constructed 90 MCH centers attached to the County Health Center but without adequate manpower, facilities, and guidelines for integrating the work of both FP and MCH. 5) The local government still considers these MCH centers only as delivery centers to take care only of those visiting maternity cases. The MCH center should be a center for the managment of all pregnancies occurring in the community and the promotion of FP with a systematic and effective linkage of resources available in the county such as i.e. Village Health Worker, Community Health Practitioner, Health Sub-center Physicians & Health workers, Doctors and Midwives in MCH center, OBGY Specialists in clinics & hospitals as practiced by the Seosan project at primary health care level.

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