• 제목/요약/키워드: Management factor

검색결과 9,565건 처리시간 0.035초

혈관 손상의 임상적 고찰 (Clinical Study of Vascular Injuries)

  • 정성운;김영규
    • Journal of Chest Surgery
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    • 제40권7호
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    • pp.480-484
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    • 2007
  • 서론: 주요 혈관 손상 시 적절한 진단 및 치료가 지연될 경우 환자가 생명을 잃거나 사지를 절단해야 할 위험이 있게 된다. 이러한 혈관 손상의 적절한 치료를 위한 지침을 세워보고자 본원에서 치료한 증례를 분석하였다. 대상 및 방법: 1999년 5월부터 2004년 9월까지 치료받은 외상성 혈관 손상 환자 26명을 대상으로 연령 및 성별 분포, 혈관 손상의 위치, 원인, 진단방법, 혈관 손상의 형태, 임상소견, 치료방법, 합병증 등을 살펴보았다. 결과: 환자의 연령분포는 평균 39.5세($12{\sim}86$세)였고 손상입은 혈관은 하행대동맥 6예, 대퇴 동맥 4예, 슬와 정맥 4예 등의 순으로 빈번하게 발생하였다. 손상의 원인으로는 의인성 손상이 8예로 가장 많았고 그 다음이 교통사고 7예, 자상 6예, 산업재해 5예 순이었다. 진단방법은 CT와 Arteriogram이 각각 9예씩으로 가장 많았고 수술 중에 발생한 의인성인 경우는 이학적 검사만으로도 진단이 가능하였다. 혈관손상의 형태는 동맥인 경우 가성 동맥류가 10예로 가장 많았고. 부분 절단된 경우가 5예, 완전 절단된 경우가 3예, 폐색이 3예 등이었다. 정맥손상의 경우는 부분절단이 6예, 완전 절단이 2예였고 동정맥루의 형태가 2예 등이었다. 임상 소견은 맥박손실 8예, 냉감 1예, 흉통 6예, 부종 5예, 출혈 5예 등이었다. 치료는 동맥손상인 경우 Graft interposition이 11예로 가장 많았고 primary repair가 4예, 단단 문합이 2예였고 동정맥루 2예는 모두 중재적 시술(endovascular repair)을 시행하였다. 심각한 합병증으로는 지연된 진단 및 치료로 인한 지체 소실이 3예 있었고 3예에서 동반된 신경손상으로 인한 운동장애 그리고 1예에서 다발성 장기 부전으로 사망하였다. 결론: 사지 보존율을 높이고 사망률을 줄이기 위해서는 즉각적인 진단과 치료를 시행할 수 있는 시스템 확보가 필수적이다. 또한 중재적 시술이 증가하는 요즘 경향을 볼 때 발생의 예방을 위한 의사 교육이 중요하며 발생 시 즉각적으로 혈관 외과의사가 개입할 수 있도록 원활한 의사 교환 및 협진 체제가 중요하다고 하겠다.

측시이한국위배경적사치품패태도(测试以韩国为背景的奢侈品牌态度), 고객자산화고객종신개치지간적관계(顾客资产和顾客终身价值之间的关系) (Examining the Relationships among Attitude toward Luxury Brands, Customer Equity, and Customer Lifetime Value in a Korean Context)

  • Kim, Kyung-Hoon;Park, Seong-Yeon;Lee, Seung-Hee;Knight, Dee K.;Xu, Bing;Jeon, Byung-Joo;Moon, Hak-Il
    • 마케팅과학연구
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    • 제20권1호
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    • pp.27-34
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    • 2010
  • 在过去的10年里,奢侈品销售已经有了显著的增长. 在2007年, 奢侈品消费额已经超过1300亿美元. 在奢侈品产业中, 有超过一半的利润来自平均收入显著增长, 对奢侈品的需求快速增加的亚洲. 在这个区域购买奢侈品牌已经成为一个有趣的社会现象并为这些公司带来利润. 作为新兴的发达国家, 韩国是亚洲最有吸引力的奢侈品市场之一. 如今, 共有120个奢侈时装品牌进入了韩国市场. 这些品牌主要集中在首尔的奢侈区域, 因此竞争也十分激烈. 本文的目的是: (1) 识别奢侈品牌态度的要素. (2) 测试奢侈品牌态度对顾客资产的影响. (3) 测定奢侈品牌态度对顾客终身价值的影响 (4) 深入研究顾客资产对顾客终身价值的影响. 以前的研究已经测定物质主义, 社会需要, 经验需要, 独特需要, 适应性和时尚卷入是对奢侈品牌态度的组成要素. Richins and Dowson (1992) 认为物质主义对与产品质量相关的购买行为有影响. Nueno and Quelch (1998) 写到对奢侈品牌的拥有传递着和所有者社会地位相关的信息. 表达着一种成功和声望的形象, 是购买行为的一个要素. 经验需要被认为是消费的一个重要方面. 尤其是发展满足消费者需求的新产品. 由于奢侈品被定义为相对稀少的产品, 对这些类型产品的拥有满足消费者对独特性的需要. 本研究中, 价值资产, 关系资产和品牌资产被测试为顾客资产的驱动因素. 样本 (n=114) 是在韩国首尔的两所私立女子大学的本科生和研究生. 我们在2009年3月进行了自填式问卷调查来收集数据. 我们运用SPSS15.0来分析数据, 包括叙述性统计, 因子分析, 信赖度分析和回归分析. 通过数据分析我们得出一些结论, 首先, 经验需要和时尚卷入对参与者对奢侈品牌的态度有积极的影响. 第二, 对奢侈品牌的态度对品牌资产有积极影响. 紧随其后的是价值资产和关系资产. 但是我们没有发现奢侈品牌态度和顾客终身价值之间的显著关系. 最后, 关系资产积极影响顾客终身价值. 总而言之, 年轻消费者是重要的潜在消费群. 他们尝试不同的品牌到最终发现哪种品牌最适合自己. 奢侈品营销者使用有效的行销策略来吸引这些可获利的潜在消费者并使他们产生忠诚度并增加顾客资产和顾客终身价值.

Assessment of Breast Cancer Knowledge among Health Workers in Bangui, Central African Republic: a Cross-sectional study

  • Balekouzou, Augustin;Yin, Ping;Pamatika, Christian Maucler;Nambei, Sylvain Wilfrid;Djeintote, Marceline;Doromandji, Eric;Gouaye, Andre Richard;Yamba, Pascal Gastien;Guessy, Elysee Ephraim;Ba-Mpoutou, Bertrand;Mandjiza, Dieubeni Rawago;Shu, Chang;Yin, Minghui;Fu, Zhen;Qing, Tingting;Yan, Mingming;Mella, Grace;Koffi, Boniface
    • Asian Pacific Journal of Cancer Prevention
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    • 제17권8호
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    • pp.3769-3776
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    • 2016
  • Background: Breast cancer is the leading cause of cancer deaths among women worldwide. High breast cancer mortality has been attributed to lack of public awareness of the disease. Little is known about the level of knowledge of breast cancer in Central African Republic. This study aimed to investigate the knowledge of health professionals on breast cancer. Materials and Methods: This cross-sectional study was conducted among 158 health professionals (27 medical; 131 paramedical) in 17 hospitals in Bangui using a self-administered questionnaire. Descriptive statistical analysis, Person's ${\chi}^2$ test and ANOVA were applied to examine associations between variables with p < 0.05 being considered significant. Results: Data analyzed using SPSS version 20 indicates that average knowledge about breast cancer perception of the entire population was 47.6%, diagnosis method 45.5%, treatment 34.3% and risk factors 23.8%. Most respondents (65.8%) agreed that breast cancer is important in Central African Republic and that family history is a risk factor (44.3%). Clinical assessments and mammography were considered most suitable diagnostic methods, and surgery as the best treatment. The knowledge level was significantly higher among medical than paramedical staff with regard to risk factors, diagnosis and treatment. However the trainee group had very high significant differences of knowledge compared with all other groups. Conclusions: There is a very urgent need to update the various training programs for these professionals, with recommendations of retraining. Health authorities must create suitable structures for the overall management of cancer observed as a serious public health problem.

만성 폐쇄성 폐질환 환자의 수면 중 산소포화도 감소에 대한 예측인자로서 안정시 및 운동시 산소포화도 (The Resting and Exercise Related Oxygen Desaturation as the Associated Factor for Sleep Related Oxygen Desaturation in Patients with Chronic Obstructive Pulmonary Disease)

  • 신창진;이관호;박혜정;신경철;정진홍;이현우
    • Tuberculosis and Respiratory Diseases
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    • 제47권2호
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    • pp.231-238
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    • 1999
  • 연구배경: 수면 중 산소포화도의 감소는 만성 폐쇄성 폐질환에 흔히 동반되며, 이러한 현상은 이차적으로 폐동맥압 상승, 폐성심 등의 혈역학적 변화와 심부정맥 등을 일으켜 환자가 사망할 수도 있다. 수면 중 동맥혈 산소포화도 감소와 안정시 동맥혈 산소분압과의 관계는 어느 정도 알려져 있으나, 낮 동안 저산소혈증 없이 발생하기도 한다. 저자들은 만성 폐쇄성 폐질환 환자에서 수면시 및 안정시의 동맥혈 산소포화도와 운동부하 심폐기능을 측정하여, 수면 중 산소포화도 감소와 관련 있는 인자 및 수면 중 산소포화도 감소를 예측하는 데 있어 운동부하심폐기능 검사법의 유용성에 대하여 알아보고자 하였다. 대상 및 방법: 만성 폐쇄성 폐질환으로 진단된 환자 중 안정상태로 회복된 환자 12명을 대상으로 하였으며, 수면 무호흡증 환자, 심질환자, 심한 빈혈이 있는 환자는 대상에서 제외하였다. 대상 환자 모두에서 일반 폐기능검사, 운동부하심폐기능검사, 수면다원검사를 시행하였고, 안정시, 운동시 그리고 수면시 산소포화도를 측정하였다. 결과: 대상 환자는 모두 남자였으며, 모두 흡연력이 있었다. 산소포화도는 최대 운동시에 비해 수면 중에 뚜렷이 감소하였으며($13.1{\pm}9.3%$$6.4{\pm}3.3%$), 수면 중 산소포화도 감소는 운동시 최저 산소포화도 (r=-0.90, p<0.01), 운동시 평균 산소포화도 (r=-0.78, p<0.05), 그리고 안정시 산소포화도 (r=-0.82, p<0.05))와 상관관계가 있었다. 수면 중 최저 산소포화도 는 운동시 최저 산소포화도 (r=0.90, p<0.01), 운동시 평균 산소포화도 (r=0.80, p<0.05), 그리고 안정시 산소포화도 (r=0.84, p<0.05)와 상관관계가 있었다. 결론: 만성 폐쇄성 폐질환 환자에서 동맥혈 산소포화도의 감소는 운동시보다 수면 중에 더욱 뚜렷하였고, 수면 중 산소포화도의 감소 정도는 안정시 산소포화도, 운동시 산소포화도와 상관관계가 있었으나, 운동부하심폐기능 검사가 수면 중 산소포화도의 감소 정도를 예측하는데 안정시 산소포화도 보다 유용하지는 않았다.

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만성질환자 배우자의 돌봄 경험에 대한 이론 구축 (A Theory Construction on the Care Experience for Spouses of Patients with Chronic Illness)

  • 최경숙;은영
    • 대한간호학회지
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    • 제30권1호
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    • pp.122-136
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    • 2000
  • Chronic illness requiring attention and management during a long period of time puts great burden onto patients, their family and society. For patients with chronic illnesses, providing social support is the most important, and the fundamental support comes from their spouses. Amount and quality of support from spouses seems to differentiated according to the sex of patients. Female patients tend to believe that their spouses are not very supportive. Therefore, the researchers assessed the burden of husbands of female arthritis patients to discover the factors that result in greater burden. Also, they developed a theoretical model of husbands′ care for their wives through a qualitative research into husbands′ experience. Method 1: The study material was 650 female arthritis patients registered in an arthritis clinic. The questionnaire about the disease experience of female arthritis patients and the burden of husbands were sent. Returned questionnaires numbered 210(32.3%) and 27 were excluded because of inadequate answers. The remaining 183 questionnaires were analyzed. The mean age of the patients was 51 years and the mean age of spouses was 55 years. The mean marital period was 28 years. The average duration since diagnosis was 9.1 years. Education level was varied from primary school to graduate school, and average income/month was 1,517,300 won. Method 2: Initial questionnaire studies on the burden of husbands were performed. Among 183 responding husbands, 23 consented to participate for a qualitative research. Data was obtained by direct and telephone interviews. The mean age of participants was 58 years, and the educational level and socioeconomic status also varied. Result: 1. Husbands′ burden: The average burden was 57.68 with a range of 6-96. 2. Burden and general characteristics: The husband′s burden correlated with the age of the patients, numbers in the family, therapy methods, patient′s level of discomfort, patient′s disease severity, patient′s level of dependence and the husband′s understanding of the level of severity. 3. Linear correlation analysis on burden: The husbands′ burden is explained in 22.5% by husband′s recognition of level of severity and husbands′ age. 4. There were four patterns of the burden on husbands: both objectve burden and subjective burden were high(pattern I), both of objectve burden and subjective burden were low(pattern II), objective burden was high but subjective burden was low(pattern III), objective burden was low but subjective burden was high(pattern IV). The pattern was correlated with the family income, educational level of the patients and their husbands, therapy methods, patient′s level of discomfort, patient′s disease severity, patient′s level of dependence and husband′s understanding of level of severity. 5. The core category of the caring experience of the husbands with arthritis patients was "companionship". The causal factor was the patients′ experience due to symptoms : physical disfigurement, pain, immobility, limitation of house chores, and limitation of social activities. Contextural factors are husbands′ identification of housework and husbands′ concern about the disease. The mediating factors are economic problems, fear of aging, feeling of limitation and family support. The strategy for interaction is mind control and how to solve emotional stress. The "companionship" resulted from caring activities, participation of household activities, helping patients′ to coping with emotional experience. 6. Companionship is established through the process of entering intervention, and caring state of mind. Entering intervention is the phase of participation of therapy and involvement of houseworks. The caring phase consists of decision on therapy, providing therapy, providing direct care, and taking over the household role of wife. Through caring phase, the changing phase set a stage in which husbands consolidate the relationship with their wives, and are reminded of the meaning of marriage. As a result, in changing phase, husbands′ companionship is enhanced. In conclusion, nursing care of chronic illnesses should include a family member especially the spouse. All information on disease shoud be provided to patients and whole family member. Strong support should also be provided to overcome difficulties in taking over role of other sex. Then the quality of life of patients and families will be much improved.

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Lactobacillus plantarum CECT 7527, 7528, 7529 혼합물이 고지방식이를 급여한 흰쥐의 비만 및 지질 대사에 미치는 영향 (Effect of Mixture of Lactobacillus plantarum CECT 7527, 7528, and 7529 on Obesity and Lipid Metabolism in Rats Fed a High-fat Diet)

  • 김대환;최미란;홍지은;이재용;이순임;정수환;김은지
    • 한국식품영양과학회지
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    • 제43권10호
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    • pp.1484-1490
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    • 2014
  • 본 연구에서는 고지방식이 투여로 비만 및 고지혈증을 유도한 동물에서 L. plantarum CECT 7527, 7528과 7529 혼합물이 비만 및 고지혈증에 미치는 영향을 조사하고자 하였다. 흰쥐에 8주 동안 고지방식이를 급여하면서 L. plantarum 혼합물을 $0.6{\sim}2.4{\times}10^9CFU/day$를 경구 투여하였고 동물을 희생하여 혈청 및 간조직 내의 지질 함량을 조사하였다. L. plantarum 혼합물 투여에 의해 체중증가량, 간과 부고환 지방 무게가 현저히 감소하였다. 또한 비만과 관련 있는 호르몬인 혈청 렙틴의 함량이 L. plantarum 혼합물 투여에 의해 감소하였다. L. plantarum 혼합물 투여가 혈청 중성지방과 HDL-콜레스테롤 함량 및 혈당에는 영향을 미치지 않았으나 혈청 총콜레스테롤 함량 및 LDL-콜레스테롤 함량을 현저히 감소하였다. 이와 더불어 L. plantarum 혼합물 투여가 동맥경화지수와 심혈관위험지수를 유의적으로 감소하였다. 간조직 내의 총 지질 함량, 중성지방 함량 및 총콜레스테롤 함량은 L. plantarum 혼합물 투여에 의해 유의적으로 감소하였다. 이상의 결과는 L. plantarum CECT 7527, 7528과 7529가 혼합된 L. plantarum 혼합물이 체지방 감소 및 고지혈증 개선 효과를 나타냄을 보여준다. 향후 더 많은 연구가 필요하나 본 연구는 L. plantarum 혼합물을 비만 및 고지혈증 개선제로 개발할 수 있는 가능성을 제시한다.

만성폐쇄성폐질환자에서 질병 중증도 및 삶의 질을 비롯한 사회적 요인과 호흡곤란과의 관계 (Relationship between Dyspnea and Disease Severity, Quality of Life, and Social Factor in Patients with Chronic Obstructive Pulmonary Disease)

  • 김은진;박재형;윤석진;이승준;차승익;박재용;정태훈;김창호
    • Tuberculosis and Respiratory Diseases
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    • 제60권4호
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    • pp.397-403
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    • 2006
  • 연구배경: 만성폐쇄성폐질환은 질병의 중증도를 추정 정상치에 대한 $FEV_1$의 백분율을 기준으로 분류해 왔다. 그러나, 같은 폐기능 검사소견을 보이는 환자들 사이에서도 환자가 느끼는 주관적 호흡곤란에는 차이가 있다. 본 연구에서는 호흡곤란이 $FEV_1$를 비롯하여, 건강관련 삶의 질, 주변으로부터 받는 도움의 정도, 직업 등에 영향을 받는지에 대해 알아보고자 하였다. 방법: 2002년 6월부터 2004년 5월까지 경북대학교병원 호흡기 내과에서 만성폐쇄성폐질환으로 추적관찰 중이며, 임상적으로 안정되어 있고 비가역적인 폐쇄성 폐기능 장애를 가진 환자 36명을 대상으로 하였다. 만성 폐쇄성 폐질환의 병기는, GOLD 병기를 따랐으며, 호흡곤란 척도는 MRC 호흡곤란 척도를 사용하였다. 건강 관련 삶의 질은 한국어 St. Goerge's respiratory questionnaire(SGRQ)를 사용하였다. 결과: 환자들의 평균 $FEV_1$은 추정 정상치의 32.0%였다. GOLD 병기와 호흡곤란 정도사이에 유의한 상관관계는 없었다(p=0.114). 호흡곤란이 심할수록 SGRQ 값의 증상(symptom)(p=0.041), 활동력(activity)(p=0.004), 영향력(impact)(p=0.001), 총점(total)(p<0.001) 수치 모두에서 의미있게 높은 수치를 보였다. 호흡곤란 정도와 직업간에 의미있는 상관관계는 없었으며(p=0.259), 호흡곤란이 심할수록 환자가 주변으로부터 받는 도움 정도는 적다고 느끼는 상관관계가 뚜렷하였다(p=0.011). 결론: 만성폐쇄성폐질환자의 진료에서 환자가 느끼는 주관적인 호흡곤란은 $FEV_1$에 따른 병기 외에도 건강관련 삶의 질 및 주변의 지지 정도와 더 연관성을 가질 수 있다는 점이 고려되어야 할 것으로 사료된다.

동기적, 사회적, 그리고 환경적 요인이 해커의 기술 습득에 미치는 영향 (Influence of Motivational, Social, and Environmental Factors on the Learning of Hackers)

  • 장재영;김범수
    • 경영정보학연구
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    • 제18권1호
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    • pp.57-78
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    • 2016
  • 해킹은 현대의 지식기반 사회에 심각한 문제를 야기하고 있다. 해킹으로 인한 피해 규모와 피해 금액 또한 꾸준히 증가하고 있다. 따라서 현재까지 해커 또는 해킹과 관련한 많은 연구들이 진행되어 왔다. 기존 연구에 의하면 해커들은 재미와 같은 내재적 동기에 의해 해킹 기술을 습득하며, 주로 해킹 커뮤니티에서 기술을 습득하는 것으로 알려져 왔다. 또한 최근에는 재미나 흥미 등 내재적 동기는 물론 금전적 보상 등과 같은 외재적 동기도 증가하고 있다고 한다. 그러나 현재까지의 관련 연구들은 표본 수집의 한계로 인해 정성적 연구에 치우쳐 왔다. 따라서 본 연구는 기존 연구의 한계를 극복하기 위해 해킹 커뮤니티에 소속된 멤버들을 대상으로 계획된 행동이론을 기반으로 한 정량적 연구를 진행했으며, 동기적, 사회적 그리고 환경적 요인이 해커의 학습에 미치는 영향 요인을 규명하였다. 본 연구는 보안 및 해킹 기술을 습득하기 위해 결성된 대학정보보호연합 동아리를 대상으로 2015년 5월에 약 2주 간 설문을 진행했다. 회원 전체에게 이메일을 보내 응답한 215개의 설문지를 바탕으로 연구가설을 검증하고 분석했다. 연구 결과, 해킹 기술 습득자들은 해킹 기술 습득이 사회적으로 비윤리적으로 인식되고 있다는 것을 스스로 인지하고 있었으며, 재미나 흥미와 같은 내재적 동기 및 타인의 인정을 추구하는 외재적 동기 모두 학습 태도에 영향을 주었고, 온라인 해킹 커뮤니티의 접근성과 정보 품질과 같은 환경적 특성이 해킹 기술 습득에 영향을 주는 것으로 나타났다. 본 연구는 학문적으로 해킹은 사회적으로 부정적으로 인식된다는 것을 밝혀내어 비윤리적 연구의 주관적 규범의 방향성에 대한 논의를 확장시켰고, 동기 요인들이 해킹 기술 습득 태도에 영향을 미친다는 점을 실증했다. 또한, 해킹 커뮤니티의 특성이 지각된 행동통제의 선행 요건임을 밝혀내어 계획된 행동이론의 적용 범위를 확장했다. 또한, 실무적으로 해커들을 윤리적 해커(정보보호전문가)로 만들기 위한 윤리 교육의 필요성과 해킹 방지를 위한 처벌의 강화 및 과징금 부과 등이 해커의 행동 변화에 영향을 줄 수 있음을 제시했다.

장바구니 크기가 연관규칙 척도의 정확성에 미치는 영향 (Effect of Market Basket Size on the Accuracy of Association Rule Measures)

  • 김남규
    • Asia pacific journal of information systems
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    • 제18권2호
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    • pp.95-114
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    • 2008
  • Recent interests in data mining result from the expansion of the amount of business data and the growing business needs for extracting valuable knowledge from the data and then utilizing it for decision making process. In particular, recent advances in association rule mining techniques enable us to acquire knowledge concerning sales patterns among individual items from the voluminous transactional data. Certainly, one of the major purposes of association rule mining is to utilize acquired knowledge in providing marketing strategies such as cross-selling, sales promotion, and shelf-space allocation. In spite of the potential applicability of association rule mining, unfortunately, it is not often the case that the marketing mix acquired from data mining leads to the realized profit. The main difficulty of mining-based profit realization can be found in the fact that tremendous numbers of patterns are discovered by the association rule mining. Due to the many patterns, data mining experts should perform additional mining of the results of initial mining in order to extract only actionable and profitable knowledge, which exhausts much time and costs. In the literature, a number of interestingness measures have been devised for estimating discovered patterns. Most of the measures can be directly calculated from what is known as a contingency table, which summarizes the sales frequencies of exclusive items or itemsets. A contingency table can provide brief insights into the relationship between two or more itemsets of concern. However, it is important to note that some useful information concerning sales transactions may be lost when a contingency table is constructed. For instance, information regarding the size of each market basket(i.e., the number of items in each transaction) cannot be described in a contingency table. It is natural that a larger basket has a tendency to consist of more sales patterns. Therefore, if two itemsets are sold together in a very large basket, it can be expected that the basket contains two or more patterns and that the two itemsets belong to mutually different patterns. Therefore, we should classify frequent itemset into two categories, inter-pattern co-occurrence and intra-pattern co-occurrence, and investigate the effect of the market basket size on the two categories. This notion implies that any interestingness measures for association rules should consider not only the total frequency of target itemsets but also the size of each basket. There have been many attempts on analyzing various interestingness measures in the literature. Most of them have conducted qualitative comparison among various measures. The studies proposed desirable properties of interestingness measures and then surveyed how many properties are obeyed by each measure. However, relatively few attentions have been made on evaluating how well the patterns discovered by each measure are regarded to be valuable in the real world. In this paper, attempts are made to propose two notions regarding association rule measures. First, a quantitative criterion for estimating accuracy of association rule measures is presented. According to this criterion, a measure can be considered to be accurate if it assigns high scores to meaningful patterns that actually exist and low scores to arbitrary patterns that co-occur by coincidence. Next, complementary measures are presented to improve the accuracy of traditional association rule measures. By adopting the factor of market basket size, the devised measures attempt to discriminate the co-occurrence of itemsets in a small basket from another co-occurrence in a large basket. Intensive computer simulations under various workloads were performed in order to analyze the accuracy of various interestingness measures including traditional measures and the proposed measures.

사용자환경의 메타포가 스마트폰 애플리케이션 사용의도에 미치는 영향 (The Effects of Metaphors in the Interface of Smartphone Applications on Users' Intention to Use)

  • 정원진;홍석기
    • Asia pacific journal of information systems
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    • 제24권3호
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    • pp.255-279
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    • 2014
  • It is not too much to say that smartphones have become an essential part of our lives due to their versatility. Nevertheless, they still have less overall capabilities than their desktop counterparts. Specifically, they have small screens and low resolutions, which make their applications difficult to have a usable interface. To account for these limitations, the interface of smartphone applications should be designed carefully and properly. Good interface design to any application is critical. However, a comprehensive information systems (IS) literature review found that there has been little research on the user interface design of smartphone applications. More specifically, there has been little empirical evidence and understanding about how metaphors, an imaginative way of describing objects and concepts, in the user interface of smartphone applications affect users' intention to use the applications. Thereby, the research goals of this study are to examine 1) the effects of the metaphors in the user interface of smartphone applications on the interaction between users and applications and 2) the effects of mediating variables including the interaction between users and applications, users' beliefs and attitudes, on users' intention to use the applications. A survey was conducted to collect data. University students and practitioners participated in the survey. A 24-item questionnaire was developed on a 5-point Likert-type scale. The measurement items were mostly adapted from the previous studies in the IS literature and modified to fit the context of this study. First, a principal component factor analysis was performed to explore the inter-relationships among a set of variables. The analysis showed that most of the items loaded quite strongly on the six components. The analysis also revealed the six components with eigenvalues exceeding 1, explaining a total of 70.7 per cent of the variance. The reliabilities of the items were also checked. Most Cronbach alpha values were above 0.8, so the scales were considered reliable. In sum, the results of the analysis support the decision to retain the six factors for further investigation. Next, the structural model was analyzed with AMOS structural equation modeling. The values of GFI, AGFI, NFI, TLI, CFI, and RMSEA were checked. The values showed that the research model considerably have a good fit in general. Next, the convergent and discriminant validities of all constructs were examined. The values for the standardized regression weights and critical ration (CR) indicated sufficient convergent validity for all constructs. In addition, the square root of the average variance extracted (AVE) of each construct was compared with its correlations with all other constructs. The results supported discriminant validity for all constructs. In sum, the results of analysis demonstrated adequate convergent and discriminant validities for all constructs. Finally, path coefficients between the variables were examined. Methphor was found to have an impact on interaction (${\beta}$ = .457, p = .000). There were also significant effects of the interaction on perceived usefulness (${\beta}$ = .273, p = .000) and ease of use (${\beta}$ = .405, p = .000). User attitude was significantly influenced by these two beliefs, perceived usefulness (${\beta}$ = .386, p = .000) and ease of use (${\beta}$ = .347, p = .000) respectively. Further, the results of analysis found that users' intention to use smartphone applications was significantly influenced by user attitude (${\beta}$ = .567, p = .000). Based upon the analyses, all hypotheses were supported. This study found that the metaphors used in the interface of smartphone applications affect not only the interaction between users and applications, but also users' intention to use the applications through the mediating variables, perceived usefulness and ease of use. These findings imply that if the metaphors used in the user interface of application are easy enough to understand for smartphone users, then the application can be perceived useful and easy to use, which in turn make users to have an intention to use the application. In conclusion, this study contributed not only to validate and extend Technology Acceptance Model (TAM) partially, but also to develop the construct of metaphor in smartphone settings. However, since a single empirical study cannot be enough to validate the findings, some limitations should be considered.