• 한국과학교육학회지
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• 제17권4호
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• pp.501-510
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• 1997

Science teachers' beliefs about science and school science and their perceptions of the science laboratory learning environment were investigated with an assumption that science laboratory teaching would be affected by science teachers' beliefs. Likert-scale questionnaires of BASSSQ and SLEI were used in this study. The major findings were as follows: 1. Science teachers showed inconsistent beliefs about science and school science. Their responses reflected a patch-like view of postmodern epistemology and objectivism They also showed somewhat different views about science and school science. It was found that science teachers had strong objectivist views about science in some parts. but they had moderate constructivist views about school science in other parts; 2. The mean scores of student cohesiveness, integration. and rule clarity on the actual version in SLEl were relatively high, but those of open-endedness and physical environment were very low; 3. There was no association between teachers' beliefs about science and their perceptions of the science laboratory learning environment. But some associations were found between teachers' beliefs about school science and their perception on student cohesiveness, integration, and rule clarity of the actual science laboratory learning environment. Teachers' beliefs about school science had some statistically significant correlations with their perceptions on all scales of the preferred version of SLEI. We could not show a causal relationship between teachers' beliefs and their science laboratory learning environment through these results. But it can be suggested that teachers' beliefs about school science do have a role in constructing a desirable science laboratory learning environment, as we found that there were statistically significant correlations between them.

• Genomics & Informatics
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• 제8권3호
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• pp.150-158
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• 2010

Genome-wise association studies (GWASs) have become popular approaches to identify genetic variants associated with human biological traits. In this study, we applied Structural Equation Models (SEMs) in order to model complex relationships between genetic networks and traits as risk factors. SEMs allow us to achieve a better understanding of biological mechanisms through identifying greater numbers of genes and pathways that are associated with a set of traits and the relationship among them. For efficient SEM analysis for GWASs, we developed a procedure, comprised of four stages. In the first stage, we conducted single-SNP analysis using regression models, where age, sex, and recruited area were included as adjusting covariates. In the second stage, Fisher's combination test was conducted for each gene to detect significant genes using p-values obtained from the single-SNP analysis. In the third stage, Fisher's exact test was adopted to determine which biological pathways were enriched with significant SNPs. Finally, based on a pathway that was associated with the four traits in common, a SEM was fit to model a causal relationship among the genetic factors and traits. We applied our SEM model to GWAS data with four central obesity related traits: suprailiac and subscapular measures for upper body fat, BMI, and hypertension. Study subjects were collected from two Korean cohort regions. After quality control, 327,872 SNPs for 8842 individuals were included in the analysis. After comparing two SEMs, we concluded that suprailiac and subscapular measures may indirectly affect hypertension susceptibility by influencing BMI. In conclusion, our analysis demonstrates that SEMs provide a better understanding of biological mechanisms by identifying greater numbers of genes and pathways.

• 한국콘텐츠학회논문지
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• 제19권5호
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• pp.178-186
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• 2019

게임중독은 사용자를 사회적으로 고립시킬 수 있다. 반면, 외로움으로 인해 게임에 몰두하게 될 수도 있다. 본 연구는 한국콘텐츠진흥원의 게임이용자 패널 데이터를 활용하여 외로움과 게임중독 간의 종단적인 상호인과관계를 분석하였다. 분석된 응답자들은 초등학교 4학년이었던 2014년부터 중학교 1학년인 2017년까지 매년 하반기 조사에 참여한 초기 청소년들(N = 346)이었고, 자기회귀 교차지연 모형이 적용되었다. 분석 결과, 외로움과 게임중독은 각기 이후 시점의 외로움과 게임중독을 상대적으로 강하게 예측하였다(자기회귀 효과). 또한, 이전 시점의 게임중독은 다음 시점의 외로움을 유의미하게 예측한 반면(교차지연 효과), 외로움은 이후 시점의 게임중독에 유의미한 영향을 끼치지 않았다. 즉, 게임중독 수준이 높으면 이후 시점의 외로움 수준이 높아졌으나, 외로움은 이후의 게임중독을 예측하지 못하였다. 이러한 결과는 게임중독이 외로움의 원인일 수 있으나 그 반대는 아님을 시사한다.

• Nutrition Research and Practice
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• 제16권5호
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• pp.673-684
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• 2022

BACKGROUND/OBJECTIVES: Although adherence to a higher diet quality may help prevent cognitive decline in older adults, literature for this in a Korean population is limited. Thus, the aim of this study was to examine the association between diet quality indices and the risk of mild cognitive impairment (MCI) in Korean older adults. SUBJECTS/METHODS: This cross-sectional study included 806 community-dwelling people aged 60 yrs and over in Korea. Diet quality was assessed via the revised Recommended Food Score (RFS) and alternate Mediterranean Diet Score (aMDS). Cognitive function was measured using a Korean version of the Mini-Mental State Examination (MMSE-KC). Associations between diet quality indices and MMSE-KC score were assessed with a general linear model after adjusting for covariates. Logistic regression was used to determine the association between diet quality indices and the risk of MCI. RESULTS: The prevalence of MCI was 35.3%. There were no significant trends between MMSE-KC scores and RFS and aMDS after adjusting for age, gender, education, exercise, living status, social activity, and alcohol drinking. Among total subjects, RFS was inversely associated with the risk of MCI after adjusting for covariates (Q5 vs. Q1; odds ratio [OR], 0.49; 95% confidence interval [CI], 0.28-0.83). Among total subjects and men, aMDS was inversely related to the risk of MCI after adjusting for covariates (Q5 vs. Q1; OR, 0.51; 95% CI, 0.29-0.89 for total subjects; Q5 vs. Q1; OR, 0.36; 95% CI, 0.15-0.83 for men). CONCLUSIONS: Our results demonstrate that high diet quality evaluated by RFS and aMDS is inversely associated with the risk of MCI. Thus, high quality diet may reduce or retard cognitive decline in the old population. Longitudinal studies are needed to determine the causal relationship between diet quality and the risk of MCI in the elderly.

• Annals of Occupational and Environmental Medicine
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• 제35권
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• pp.33.1-33.9
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• 2023

Background: Studies on the association between occupational stress and depression have been frequently reported. However, the cross-sectional designs of studies limited insight into causal associations. In this study, we investigated the longitudinal association between occupational stress and new-onset depression among employees in a single manufacturing plant. Methods: The annual health checkup data of employees at a manufacturing plant in Korea were collected. A total of 1,837 male employees without depression who completed a health checkup during two consecutive years were included. Occupational stress was measured using a short form of the Korea Occupational Stress Scale (KOSS-SF), and depression was assessed using a Patient Health Questionnaire-2. The association between occupational stress change over the two years and newly developed depression was investigated using two logistic regression models. Results: Across all sub-factors of KOSS-SF, employees who reported increased occupational stress had a higher risk of new-onset depression. Newly developed depression was significantly associated with job demand (odds ratio [OR]: 4.34; 95% confidence interval [CI]: 2.37-7.96), job insecurity (OR: 3.21; 95% CI: 1.89-5.48), occupational climate (OR: 3.18; 95% CI: 1.91-5.31), lack of reward (OR: 2.28; 95% CI: 1.26-4.12), interpersonal conflict (OR: 2.14; 95% CI: 1.18-3.86), insufficient job control (OR: 1.93; 95% CI: 1.05-3.56), and the organizational system (OR: 1.84; 95% CI: 1.01-3.36). Conclusions: For every sub-factor of the KOSS-SF, occupational stress increase and persistent high stress were associated with the risk of developing new-onset depression. Among the seven sub-factors, job demand had the most significant effect. Our results show that occupational stress should be managed to promote employee mental healthcare.

• Clinical Nutrition Research
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• 제13권1호
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• pp.51-60
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• 2024

Obesity and overweight pose a significant public health problem, as they are associated with an elevated risk of metabolic syndrome (MetS). Several studies have shown that diet quality is associated with the development of MetS risk factors. Analyzing dietary patterns may be more helpful in determining the relationship between eating habits and chronic diseases compared to focusing on single foods or nutrients. In this study, our objective was to evaluate the association of food quality score (FQS) with risk factors for MetS in individuals with obesity and overweight. The participants in this cross-sectional study were 340 adults with overweight and obesity. Participants' food intake was measured using a Food Frequency Questionnaire, then the FQS was calculated. A fasting blood sample assessed serum glucose, triglycerides, total cholesterol (TC), high-density lipoprotein cholesterol, and serum insulin levels. Fat-free mass, height, basal metabolic rate, socio-economic score, and waist-to-hip ratio significantly differed among FQS tertiles. TC, systolic and diastolic blood pressure, and fasting blood glucose were significantly lower in the highest tertile of FQS. After multivariable adjustment, our results showed that individuals in the third tertile of FQS had reduced risk of higher levels of TC (odds ratio [OR], 0.982; 95% confidence interval [CI], 0.970-0.984) and higher levels of low-density lipoprotein cholesterol (OR, 0.974; 95% CI, 0.974-0.999). Our findings demonstrate an inverse relationship between diet quality, as measured by FQS, and MetS risk factors. However, further experimental and longitudinal investigations are warranted to elucidate the causal nature of this association.

• Asia Marketing Journal
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• 제14권1호
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• pp.99-130
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• 2012

과거 기업은 고객만족을 통해 고객의 충성도를 구축해 지속적인 이윤을 창출하는데 주로 초점을 맞추었다. 그러나 고객들은 기업에게 긍정적 영향만을 주지 않으며 때로는 기업을 위험에 빠뜨리기도 하고 곤란에 처하게 하기도 한다. 서비스 실패를 경험한 고객에게 기업이 적절한 서비스 회복조치를 취하지 못했을 때 그들은 배신감과 분노 같은 강한 부정적 정서를 느끼며 이러한 부정적 정서는 기업의 성과에 상당한 부정적 영향을 미칠 수 있는 공격적 행동이나 보복행동을 유발 할 수 있다. 고객이 느끼는 이러한 부정적 정서는 기업과 오랜 거래관계를 유지하고 그 기업에 대해 애착을 가진 충성고객에게 더 강하게 발생될 수 있다. 강한 배신감을 느낀 충성고객은 단순히 경쟁기업으로 브랜드 전환을 하는데 머무는 것이 아니라 온라인 부정적 구전, 불매운동, 언론매체를 통한 호소 등의 강력한 보복행동을 수행한다. 본 연구는 서비스 실패요인으로 발생되는 배신감이라는 감정이 보복욕구를 통해 보복행위까지 가는 인과관계에 대해 알아보고, 기업 간의 충성도가 각기 다른 고객들을 분류하여 그 차이를 살펴보았다. 실증분석 결과 각각의 공정성 훼손은 모두 지각된 배신감에 유의한 영향을 미치는 것으로 나타났다. 특히 고객들은 분배 공정성 훼손으로 인한 서비스 실패를 경험하였을 경우 가장 높게 배신감을 지각했으며 절차공정성 훼손으로 인한 서비스 실패를 경험하였을 경우 배신감을 가장 낮게 느끼게 하는 것으로 나타났다. 또한 지각된 배신감은 보복욕구에 유의한 영향을 미치며 이후 부정구전과 보복적인 불평행동, 제3단체를 통한 불만 홍보와 같은 보복행위 모두에 유의한 영향을 미치는 것으로 나타났다. 따라서 공정성 훼손은 지각된 배신감과 보복욕구와 같은 매개변수를 통하여 보복행위에 영향을 미치는 것으로 볼 수 있다. 마지막으로 공정성 훼손과 지각된 배신감과의 관계에서 과거 해당기업과 고객 간의 관계의 친밀도를 나타내는 관계품질의 조절변수 역할을 검증한 결과 관계품질은 조절변수로서 역할을 하는 것으로 나타났다. 본 연구는 서비스 실패 요인이 보복행위에 미치는 영향을 단순 인과관계로 보지 않고 기업과 고객 간의 관계품질의 조절효과를 고려하여 연구를 하였다는 데 그 의의가 있다.

• 한국콘텐츠학회논문지
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• 제8권12호
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• pp.1-9
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• 2008

인과관계의 지식을 모델링하고 표현하며 추론하는 주요 형식화 방법의 하나인 퍼지인식도(Fuzzy Cognitive Map)는 주로 인과지식공학에 많이 사용되고 있다. 인과관계의 자연스럽고 쉬운 의사결정의 이해와 전후관계의 자연스러운 설명이라는 장점에도 불구하고 인과관계의 지식 모델링과 표현은 구현에 있어서 수학적인 적용의 모호함과 복잡한 알고리즘으로 인해 상호작용에 기반 한 구축 시스템을 찾아보기 어렵다. 본 논문에서는 인과지식 추론을 위한 퍼지 인식도의 구축 지원 시스템을 제시한다. 본 논문에서 제안하는 인과관계 추론 시스템은 다중 전문가의 지식을 반영하기 위해 지식을 점진적으로 반영하여 퍼지 인식도를 구축한다. 또한 전문가와의 상호작용을 통해 구현된 퍼지 인식도의 구조를 동적으로 디스플레이함으로써 사용자 지향적인 환경을 제공한다.

• 한국지리정보학회지
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• 제14권4호
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• pp.116-127
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• 2011

본 논문에서는 로지스틱 회귀분석 기법을 이용하여 산사태 취약성 분석을 수행하였다. 예측모델의 성능은 모델의 적합도 검증을 통해 사용된 데이터가 모델에 얼마나 잘 반영되어 구축되었는지에 대한 적합도 평가뿐만 아니라 예측성능에 대한 평가가 필요하다. 따라서 이 논문에서는 모델에 대한 객관적인 결과를 얻기 위해 이와 같은 두 가지 측면에 대하여 예측성능 평가를 적용하였다. 연구지역은 2006년도 집중 호우로 많은 산사태가 발생한 강원도 인제 일대를 대상으로 하였다. 산사태 관련인자들은 지형도, 토양도, 임상도로부터 추출하였다. 예측모델에 대한 평가는 누적이득차트 곡선의 하부영역을 계산하였다. 예측모델의 적합도 평가에서는 87.9% 교차검증을 통한 예측정확도 평가 결과 84.8%로 두 평가 결과간의 큰 차이를 보이지 않으며 좋은 성능의 결과를 산출하였다. 이는 산사태와 관련성이 높은 유발인자와 예측모델 성능에서 기인된 결과로 해석 될 수 있다.

• 대한영양사협회학술지
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• 제18권2호
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• pp.141-154
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• 2012

The prevalence of atopic dermatitis (AD), chronic cutaneous disease, has increased rapidly worldwide. Since AD is the most common disease affecting infants, maternal food intake during pregnancy as well as lactation is important. The purpose of this research was to examine the difference in maternal food intake during pregnancy between mothers having children with or without AD. One hundred forty-eight mothers with children aged under 2 years with AD (AD group, n=74) or without AD (non-AD group, n=74) were included in the study. Diet during pregnancy was examined using a food frequency questionnaire. There were no differences in the status of mothers' food consumption during pregnancy between the AD and non-AD groups. Mothers in the AD group consumed significantly less white fish (P<0.05), carrot & pumpkin (P<0.01), walnut & pine nut (P<0.05), mandarin & orange (P<0.05), and peach (P<0.05) than those in the non-AD group. As food frequencies were categorized according to <1/month, 1~3/month, 1~6/week, and 1~3/day, lower consumption of carrot & pumpkin (Odds Ratio (OR)=6.67, 95% Confidence Interval (CI)=1.98~22.44), tomato (OR=5.11, 95% CI=1.62~16.08), mandarin & orange (OR=8.64, 95% CI=1.59~46.81), and walnut & pine nut (OR=3.85, 95% CI=1.26~11.77) increased the risk of childhood AD. According to the results, maternal food intakes during pregnancy were significantly different between the AD and non-AD groups. Therefore, further studies are necessary to examine the causal relationship between maternal food intake and prevalence of AD in children.