• 정보화정책
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• 제29권4호
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• pp.26-42
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• 2022

본 연구는 학습자 관점에서 메타버스를 활용한 교육 효과를 알아보기 위해 1) 메타버스 교육플랫폼을 사용하기 전후 수업에 대한 기대와 가치가 충족되었는지를 평가하고, 2) 메타버스 기반의 교육 만족도에 영향을 미치는 요인을 자기효능감과 기대-가치 변인을 통해 검증하고자 했다. 이를 위해 기대-가치는 학습효과와 소통, 수업관여도, 그리고 학습 태도로 평가했고, 자기효능감은 과제난이도 선호, 자기조절 효능감, 그리고 자신감으로 살펴보았다. 서울시 동북부의 한 대학교에서 메타버스 교육플랫폼을 활용한 교과목을 신청한 대학생 70명을 대상으로 한 연구 결과, 학습자는 메타버스를 사용하기 전에 메타버스 활용 교육에 대한 기대와 가치 평가가 높았으나, 이용 후 모든 것이 충족되지 않은 것으로 나타났다. 교육 만족도 평가 결과, 기대-가치 평가항목은 메타버스 교육 만족도에 부정적인 영향을 미쳤지만, 학습자의 자기효능감이 높을수록 만족도가 높게 나타나는 경향성이 일부 나타났는데, 자기효능감의 하위요소 중 과제난이도 선호와 자기조절 효능감이 통계적으로 유의미한 것으로 나타났다. 이 연구는 메타버스를 활용한 교육이 이제 막 시작하는 상황에서 학습자 중심의 메타버스 기반 교육 평가라는 점에서 의미가 있다.

• 유기물자원화
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• 제29권4호
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• pp.33-40
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• 2021

본 연구에서는 실규모 UASB 소화조에서 높이에 따른 그래뉼 슬러지의 물리화학·생물학적 특성에 대해 조사하였다. 혐기성 그래뉼은 UASB 반응조에서 지상으로부터 1 m 높이별(1 m, 2 m, 3 m)로 채취하였다. 형태학적 분석결과, 그래뉼의 크기는 소화조의 상단부로 갈수록 커졌고 원형율(roundness)은 하단부에서 더 둥근 형태를 나타내었다. ANOVA 검정 결과, 그래뉼의 평균 크기와 원형율은 95% 신뢰수준에서 통계적으로 유의한 차이를 보였고 두 변수 사이에 유의한 음의 상관관계가 있는 것으로 나타났다(r=-0.40, p<0.05). 아세트산, 프로피온산, 부틸산을 기질로 사용한 SMA test 결과에서는 2 m 높이에서 채취한 그래뉼의 비메탄활성도가 가장 높았다. EPS의 경우 높이에 따라 함량이 다양하게 나타났으며 2 m에서 가장 높았다. 본 실험의 결과를 통해 높이별 그래뉼 슬러지의 특성을 이해하고 소화조의 유지관리 및 성능 개선에 기초 자료로 활용할 수 있을 것으로 판단된다.

• 예술인문사회 융합 멀티미디어 논문지
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• 제6권3호
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• pp.191-202
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• 2016

사회적 거리감(social distance)은 사회집단에 대한 태도를 측정할 수 있는 개념으로서 취약층의 사회행동 연구에 유용하다. 일반 아동들이 보이는 사회적 거리감이 두드러질수록 다문화가정자녀들의 자신감과 사회적 유능성이 저해될 수 있다. 이에 본 연구는 다문화가정자녀에 대한 일반아동들의 사회적 거리감에 영향을 미치는 요인을 다문화접촉경험, 긍정적 정서와 인지로 본 고정관념, 단일민족의 식을 중심으로 고찰하여 일반아동의 사회적 거리감에 관한 경험적 근거를 제시하고자 하였다. 주요결과는 첫째, 다문화접촉경험 중 높은 친밀도, 외국인 이웃의 인종(특히 백인과 흑인), 미디어와 다문화 교육을 받은 경우가 높은 수준의 사회적 거리감과 관련되었다. 둘째, 다문화가정자녀에 대해 긍정적으로 느끼고 인식할수록 사회적 거리감은 낮아졌다. 셋째, 위계적 회귀분석 결과, 다문화가정자녀에 대한 긍정적 정서, 긍정적 인지가 사회적 거리감을 유의하게 낮추는 효과가 나타났고. 친밀도와 다문화 교육은 사회적 거리감을 오히려 높이는 결과를 보였다. 이러한 결과에 근거하여 다문화가정자녀를 대하는 일반아동의 행동에 관한 사회복지실천을 위한 함의를 제시하였다.

• 한국프랜차이즈경영연구
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• 제8권2호
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• pp.25-36
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• 2017

Purpose - Recently, entrepreneurship education has been revitalized with interest in entrepreneurship. Entrepreneurship education is an educational service activity that is provided for entrepreneurship and individual start-up success within a certain period of time. According to previous studies on entrepreneurship and entrepreneurship, the satisfaction of entrepreneurship education affects entrepreneurship and as a result increases entrepreneurship. In recent years, the number of female entrepreneurs has also increased as the number of entrepreneurial issues has increased. Based on previous studies, this research proposed the theoretical framework about the structural relationships among mentoring quality (career development, psychological social, role modeling), education satisfaction, recommendation intention and entrepreneurial intention. This study is to find out the possibility of attempting to create a theoretical basis for entrepreneurial mentoring education in entrepreneurship education program. Research design, data, and methodology - In this model, mentoring quality consists of three sub-dimensions such as career development, psychological social, and role modeling. In order to test research model and hypotheses, the data were collected from 203 female college students who participated in entrepreneurial education. The data were analyzed using frequency analysis, confirmatory factor analysis, correlation analysis, and structural equational modeling with SPSS 24.0 and SmartPLS 3.0 statistical program. Result - The results of the study are as follows. First, role modeling has a positive effect on recommendation intention and entrepreneurial intention. Second, career development has a strong negative effect on the entrepreneurial intention. Third, career development and role modeling had a positive effect on educational satisfaction, and educational satisfaction had positive influence on recommendation intention and entrepreneurial intention. Conclusions - As women's social advancement becomes more active, start-up support programs including entrepreneurship mentoring are increasing. The results of this study suggest how to use the mentoring program mix and how to allocate the resources for the education program when the entrepreneurial education manager plans and executes the mentoring education program. For example, this study shows that career development and role modeling enhance educational satisfaction, and in turn increase recommendation intention and entrepreneurial intention. This means that entrepreneurship education should consist of contents that include career development functions such as sponsorship, guidance, protection, and provision of challenging work. In addition, the findings of this study indicate that mentors should perform the function of allowing the participants to have confidence and professional thinking ability at the time of start up based on their experiences.

• 한국심리학회지:여성
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• 제16권3호
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• pp.303-329
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• 2011

우리나라는 여성의 교육참여율이 과거 어느 때보다 높은데 비해 인력활용율은 OECD국가 중 최저 수준에 머물고 있다. 이렇게 고학력 여성인력의 활용률이 저조한 원인으로 진로상담영역에서 '진로선택'과 관련된 원인에 주목하였다. 전통적으로 직업을 여성중심 또는 남성 중심 직업으로 분류할 때 아직까지도 많은 여성들이 남성중심 직업을 회피하는 경향이 있으며, 이러한 편중현상을 해소해야만 다양한 인력활용이 가능할 것이다. 이를 위해 본 연구에서는 남성중심적 직업을 희망하는 여대생들에 대한 질적 연구를 통해 이들의 경험구조 및 직업결정 과정을 밝히고, 그 과정에서 부정적 또는 긍정적으로 작용하는 요인들을 밝혀 여성 진로지도에 활용하고자 하였다. 남성중심적 직업을 선택하며 취업준비중인 대학교 3학년 이상 여학생 8명을 심층면접한 녹음자료를 분석한 결과 총 61개의 개념과 27개의 하위범주, 12개의 범주가 도출되었다. 범주들을 토대로 핵심범주인 '특별한 삶을 위해 의지를 갖고 도전해 나가기'가 도출 되었다. 또한 패러다임 분석을 통해 인과적 조건, 중심현상, 맥락적 조건, 중재적 조건, 작용/상호작용 전략과 결과를 구분하였다. 과정 분석을 통해 기질과 포부 인식 단계, 내적결의 단계, 지지와 수용 단계, 도전과 극복의 순환 단계, 긍정과 확신의 단계로 총 5 단계의 직업결정 과정이 밝혀졌다. 논의에서는 연구의 의의와 제한점 및 후속연구에 대한 제안에 대해 언급하였다.

• Journal of Korean Neurosurgical Society
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• 제66권6호
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• pp.716-725
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• 2023

Objective : Anterior cervical spine surgery (ACSS) is a common surgical procedure used to treat cervical spinal degenerative diseases. One of the complications associated with ACSS is prevertebral soft tissue swelling (PSTS), which can result in airway obstruction, dysphagia, and other adverse outcomes. This study aims to investigate the correlation between various cervical sagittal parameters and PSTS following single-level ACSS, as well as to identify independent risk factors for PSTS. Methods : A retrospective study conducted at a single institution. The study population included all patients who underwent single-level ACSS between January 2014 and December 2022. Patients with a history of cervical spine surgery or trauma were excluded from the study. The presence and severity of PSTS was assessed by reviewing pre- and postoperative imaging studies. The potential risk factors for PSTS that were examined include patient age, sex, body mass index, tobacco use, comorbidities, serum albumin levels, operative time, implant type, implanted level, and various cervical spine sagittal parameters. Multivariate linear regression analysis was performed to identify the independent risk factors for PSTS. Results : A total of 62 consecutive patients who underwent single-level ACSS over a 8-year period at a single institution were enrolled in this study. Only preoperative segmental angle showed positive correlation with PSTS among various cervical spine sagittal parameters (r=0.36, p=0.005). Artificial disc replacement showed a negative correlation with PSTS (β=-0.38, p=0.002), whereas the use of demineralized bone matrix (DBM) had a positive impact on PSTS (β=0.33, p=0.009). We found that male sex, lower preoperative serum albumin, and implantation of upper cervical level (above C5) were independent predictors for PSTS after single-level ACSS (β=1.21; 95% confidence interval [CI], 0.27 to 2.15; p=0.012; β=-1.63; 95% CI, -2.91 to -0.34; p=0.014; β=1.44; 95% CI, 0.38 to 2.49; p=0.008, respectively). Conclusion : Our study identified male sex, lower preoperative serum albumin levels, and upper cervical level involvement as independent risk factors for PSTS after single-level ACSS. These findings can help clinicians monitor high-risk patients and take preventive measures to reduce complications. Further research with larger sample sizes and prospective designs is needed to validate these findings.

• Korean Journal of Radiology
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• 제21권11호
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• pp.1256-1264
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• 2020

Objective: Lung segmentation using volumetric quantitative computed tomography (CT) analysis may help predict outcomes of patients with coronavirus disease (COVID-19). The aim of this study was to investigate the relationship between CT volumetric quantitative analysis and prognosis in patients with COVID-19. Materials and Methods: CT images from patients diagnosed with COVID-19 from February 18 to April 15, 2020 were retrospectively analyzed. CT with a negative finding, failure of quantitative analysis, or poor image quality was excluded. CT volumetric quantitative analysis was performed by automated volumetric methods. Patients were stratified into two risk groups according to CURB-65: mild (score of 0-1) and severe (2-5) pneumonia. Outcomes were evaluated according to the critical event-free survival (CEFS). The critical events were defined as mechanical ventilator care, ICU admission, or death. Multivariable Cox proportional hazards analyses were used to evaluate the relationship between the variables and prognosis. Results: Eighty-two patients (mean age, 63.1 ± 14.5 years; 42 females) were included. In the total cohort, male sex (hazard ratio [HR], 9.264; 95% confidence interval [CI], 2.021-42.457; p = 0.004), C-reactive protein (CRP) (HR, 1.080 per mg/dL; 95% CI, 1.010-1.156; p = 0.025), and COVID-affected lung proportion (CALP) (HR, 1.067 per percentage; 95% CI, 1.033-1.101; p < 0.001) were significantly associated with CEFS. CRP (HR, 1.164 per mg/dL; 95% CI, 1.006-1.347; p = 0.041) was independently associated with CEFS in the mild pneumonia group (n = 54). Normally aerated lung proportion (NALP) (HR, 0.872 per percentage; 95% CI, 0.794-0.957; p = 0.004) and NALP volume (NALPV) (HR, 1.002 per mL; 95% CI, 1.000-1.004; p = 0.019) were associated with a lower risk of critical events in the severe pneumonia group (n = 28). Conclusion: CRP in the mild pneumonia group; NALP and NALPV in the severe pneumonia group; and sex, CRP, and CALP in the total cohort were independently associated with CEFS in patients with COVID-19.

• Korean Journal of Radiology
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• 제25권4호
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• pp.351-362
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• 2024

Objective: To measure inter-reader agreement and identify associated factors in interpreting complete response (CR) on magnetic resonance imaging (MRI) following chemoradiotherapy (CRT) for rectal cancer. Materials and Methods: This retrospective study involved 10 readers from seven hospitals with experience of 80-10210 cases, and 149 patients who underwent surgery after CRT for rectal cancer. Using MRI-based tumor regression grading (mrTRG) and methods employed in daily practice, the readers independently assessed mrTRG, CR on T2-weighted images (T2WI) denoted as mrCR_T2W, and CR on all images including diffusion-weighted images (DWI) denoted as mrCR_overall. The readers described their interpretation patterns and how they utilized DWI. Inter-reader agreement was measured using multi-rater kappa, and associated factors were analyzed using multivariable regression. Correlation between sensitivity and specificity of each reader was analyzed using Spearman coefficient. Results: The mrCR_T2W and mrCR_overall rates varied widely among the readers, ranging 18.8%-40.3% and 18.1%-34.9%, respectively. Nine readers used DWI as a supplement sequence, which modified interpretations on T2WI in 2.7% of cases (36/1341 [149 patients × 9 readers]) and mostly (33/36) changed mrCR_T2W to non-mrCR_overall. The kappa values for mrTRG, mrCR_T2W, and mrCR_overall were 0.56 (95% confidence interval: 0.49, 0.62), 0.55 (0.52, 0.57), and 0.54 (0.51, 0.57), respectively. No use of rectal gel, larger initial tumor size, and higher initial cT stage exhibited significant association with a higher interreader agreement for assessing mrCR_overall (P ≤ 0.042). Strong negative correlations were observed between the sensitivity and specificity of individual readers (coefficient, -0.718 to -0.963; P ≤ 0.019). Conclusion: Inter-reader agreement was moderate for assessing CR on post-CRT MRI. Readers' varying standards on MRI interpretation (i.e., threshold effect), along with the use of rectal gel, initial tumor size, and initial cT stage, were significant factors associated with inter-reader agreement.

• Korean Journal of Radiology
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• 제24권6호
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• pp.529-540
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• 2023

Objective: To compare the diagnostic performance and clinical outcomes of 2-mSv computed tomography (CT) and conventional-dose CT (CDCT), following radiology residents' interpretation of CT examinations for suspected appendicitis. Materials and Methods: Altogether, 3074 patients with suspected appendicitis aged 15-44 years (28 ± 9 years, 1672 females) from 20 hospitals were randomly assigned to the 2-mSv CT (n = 1535) or CDCT (n = 1539) groups in a pragmatic trial from December 2013 and August 2016. Overall, 107 radiology residents participated in the trial as readers in the form of daily practice after online training for 2-mSv CT. They made preliminary CT reports, which were later finalized by attending radiologists via addendum reports, for 640 and 657 patients in the 2-mSv CT and CDCT groups, respectively. We compared the diagnostic performance of the residents, discrepancies between preliminary and addendum reports, and clinical outcomes between the two groups. Results: Patient characteristics were similar between the 640 and 657 patients. Residents' diagnostic performance was not significantly different between the 2-mSv CT and CDCT groups, with a sensitivity of 96.0% and 97.1%, respectively (difference [95% confidence interval {CI}], -1.1% [-4.9%, 2.6%]; P = 0.69) and specificity of 93.2% and 93.1%, respectively (0.1% [-3.6%, 3.7%]; P > 0.99). The 2-mSv CT and CDCT groups did not significantly differ in discrepancies between the preliminary and addendum reports regarding the presence of appendicitis (3.3% vs. 5.2%; -1.9% [-4.2%, 0.4%]; P = 0.12) and alternative diagnosis (5.5% vs. 6.4%; -0.9% [-3.6%, 1.8%]; P = 0.56). The rates of perforated appendicitis (12.0% vs. 12.6%; -0.6% [-4.3%, 3.1%]; P = 0.81) and negative appendectomies (1.9% vs. 1.1%; 0.8% [-0.7%, 2.3%]; P = 0.33) were not significantly different between the two groups. Conclusion: Diagnostic performance and clinical outcomes were not significantly different between the 2-mSv CT and CDCT groups following radiology residents' CT readings for suspected appendicitis.

• Korean Journal of Radiology
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• 제24권4호
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• pp.274-283
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• 2023

Objective: To compare the outcomes of digital breast tomosynthesis (DBT) screening combined with ultrasound (US) with those of digital mammography (DM) combined with US in women with dense breasts. Materials and Methods: A retrospective database search identified consecutive asymptomatic women with dense breasts who underwent breast cancer screening with DBT or DM and whole-breast US simultaneously between June 2016 and July 2019. Women who underwent DBT + US (DBT cohort) and DM + US (DM cohort) were matched using 1:2 ratio according to mammographic density, age, menopausal status, hormone replacement therapy, and a family history of breast cancer. The cancer detection rate (CDR) per 1000 screening examinations, abnormal interpretation rate (AIR), sensitivity, and specificity were compared. Results: A total of 863 women in the DBT cohort were matched with 1726 women in the DM cohort (median age, 53 years; interquartile range, 40-78 years) and 26 breast cancers (9 in the DBT cohort and 17 in the DM cohort) were identified. The DBT and DM cohorts showed comparable CDR (10.4 [9 of 863; 95% confidence interval {CI}: 4.8-19.7] vs. 9.8 [17 of 1726; 95% CI: 5.7-15.7] per 1000 examinations, respectively; P = 0.889). DBT cohort showed a higher AIR than the DM cohort (31.6% [273 of 863; 95% CI: 28.5%-34.9%] vs. 22.4% [387 of 1726; 95% CI: 20.5%-24.5%]; P < 0.001). The sensitivity for both cohorts was 100%. In women with negative findings on DBT or DM, supplemental US yielded similar CDRs in both DBT and DM cohorts (4.0 vs. 3.3 per 1000 examinations, respectively; P = 0.803) and higher AIR in the DBT cohort (24.8% [188 of 758; 95% CI: 21.8%-28.0%] vs. 16.9% [257 of 1516; 95% CI: 15.1%-18.9%; P < 0.001). Conclusion: DBT screening combined with US showed comparable CDR but lower specificity than DM screening combined with US in women with dense breasts.