초기 청소년기 정서행동문제의 종단적 변화에 따른 잠재프로파일 분류 및 전이 영향요인 분석

김빛나,장혜인,박주희 가정과삶의질학회 2021 가정과삶의질학회 학술발표대회 자료집 Vol.2021 No.5

박막 BIPV창의 온도변화와 발전성능 상관관계에 관한 실측연구

김빛나,윤종호,신우철 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.3

This research on building Integrated Photovoltaic System replacing windows and doors with amorphous silicon thin film PV windows and doors installing same exact mount on Mock-up. The windows and doors should be installed in different angle and bearing so that we can analyse the amount of electricity from them. The objective of the research is to evaluate and investigate the relationship between factors(intensity of solar radiation, PV window surface temperature, incidence angle, and sky conditions) that affects performance of PV window and performance. The range and method of this research is to establish monitoring system and analysis the data from the monitoring system to evaluate the performance of PV windows that have thin film of solar battery. We should evaluate the insolation according to the position of PV window, output, and surface temperature according to months and seasons so that we can figure out the relationship between these. And we should investigate the relationship between performance and efficiency according to incidence angle and sky condition so that we can figure out the correlation between factors and performance.

전자선 조사 양념 오징어 젓갈 및 부재료의 미생물학적 및 관능적 특성

김빛나,정사무엘,최준호,류현덕,조철훈 충남대학교 농업과학연구소 2008 농업과학연구 Vol.35 No.2

A seasoned squid Jeotkal, Korean traditional fermented seafood , and its ingredients for manufacturing, including red hot pepper powder, ground garlic, sesame seeds, were irradiated with 0, 0.5, 1, 2, and 5 kGy by electron beam and stored at 4℃ for 4 weeks to determine the changes in microbiological and sensory characteristics. The initial contamination of squid Jeotkal such as total aerobic bacteria, yeast & mold, and coliform bacteria were at the levels of 2.88, 3.04, and 4.20 log CFU/g, respectively. However, electron beam irradiation with does at 5 kGy reduced the total aerobic bacteria to about 1 log CFU/g. Yeast & mold and coliform bacteria were reduced to 1-2 log CFU/g after 2 kGy of irradiation and reached to undetected level when the sample was irradiated at 5 kGy and following storage at 4℃ for 4 weeks. Sensory characteristics showed that electron beam irradiation of up to 5 kGy did not adversely affect overall acceptability of squid Jeotkal and its ingredients during cold storage. Therefore, electron beam irradiation is one of the possible means to improve storage stability of seasoned squid jeotkal, which has limited alternative sterilization methods due to the temperature characteristics of the products. 본 연구는 전자선 조사기술을 이용하여 우리나라 전통 발효 식품인 젓갈류 중 오징어젓갈의 유통 안정성을 확보하고자 실시되었다. 저장성 감소에 가장 문제가 될 수 있는 총균수, 효모 및 곰팡이, 대장균군 등의 미생물에 대해 5kGy선량까지의 전자선 조사는 1-2 log cycle 정도의 감균효과를 나타내었고. 5 kGy 전자선 조사를 통해 검출한계치 이하로 측정되었다. 관능적 품질에 대한 결과에서도 모든 처리군에 대하여 유의적인 차이가 없는 것으로 나타났으며, 이는 젓갈뿐만 아니라 젓갈 제조시 사용되는 부재료에서도 유사한 경향을 나타내었다. pH 측정 결과 젓갈의 pH가 전자선 조사시 대조구에 비해오래 유지되는 것을 볼 수 있었다. 따라서 전자선 조사는 젓갈의 미생물을 효과적으로 제어하고, 이취 및 이미 등의 발생이 없이 우수한 관능적 품질을 유지하므로 저염 오징어 젓갈의 유통 안정성을 확보할 수 있는 살균 방법이라 사료된다.

활성화 온도 및 KOH농도에 따른 그래핀 기반의 에너지소자 연구

김빛나,김종필,윤장희 한국표면공학회 2022 한국표면공학회 학술발표회 초록집 Vol.2022 No.6

The Effects of Content Schema on Korean Middle School EFL Learners’ Reading Comprehension

김빛나,강유선 한국응용언어학회 2017 응용 언어학 Vol.33 No.2

Despite numerous research studies concerning the role of content schema in reading comprehension, little is known about its exact contribution to different sub-types of reading comprehension: inferential and factual comprehension, and main idea and details comprehension. Moreover, the potential effects of general language proficiency and language learning backgrounds have been largely overlooked in the existing studies. Thus, this study investigated the effects of schema on these four different sub-types of reading comprehension abilities of Korean EFL learners, while controlling for the effects of English language proficiency, measured by vocabulary knowledge, and oversea experiences. One hundred seventy Korean middle school EFL students participated and were tested on specific content prior knowledge, and their performance on reading comprehension abilities that were sub-divided into inferential, factual, main idea, and detail comprehension was analyzed. The analyses not only revealed strong correlation among the examined variables, but also demonstrated that schema plays a significant predictive role in explaining reading comprehension, especially that in inferential comprehension and details retrieval. These findings have important pedagogical implications for building and activating appropriate content-related background knowledge for middle school EFL students in developing their English reading comprehension abilities.

선천성 편측비대증 자녀 양육에 대한 어머니의 인식과 태도: Q 방법론 적용

김빛나,유진나,차혜경 한국주관성연구학회 2023 주관성연구 Vol.- No.63

본 연구는 선천성 편측비대증 자녀를 양육하는 어머니의 인식과 태도에 대한 개인 내적 의미와 그 특성을 파악하기 위해 Q 방법론을 적용하여 선천성 편측비대증 아동 어머니의 양육에 대한 주관적인 인식을 파악하였다. 총 24명의 대상자가 44개의 Q 표본을 강제 분포되도록 Q 분류를 시행하였다. 연구 결과, 선천성 편측비대증 아동 어머니의 양육은 3개의 유형으로 분류되었다. 1유형은 ‘낙관적 수용’으로 자녀의 질환을 인정하고 긍정적으로 치료받을 수 있도록 노력하는 유형이었다. 2유형은 ‘불안정 수용’으로 겉으로는 자녀의 질환을 긍정적으로 받아들이는 듯하지만, 두려움과 불안감을 가지고 있는 유형, 3유형은 ‘비관적 수용’으로 자녀의 질환을 온전히 받아들이지 못하고 슬픔과 좌절을 느끼고 있는 유형으로 분류되었다. 본 연구는 선천성 편측비대증 자녀를 양육하는 어머니의 인식과 태도를 이해하고, 이를 바탕으로 유형별 특성을 고려한 개별화된 중재를 계획하는 데 도움을 줄 수 있다는 데 의의가 있다.

제한된 평균 생존시간을 이용한 위암 3기 자료 분석에 관한 연구

김빛나,이민정,Kim, Bitna,Lee, Minjung 한국통계학회 2021 응용통계연구 Vol.34 No.2

본 연구는 미국 국립암연구소의 SEER 프로그램에서 제공하는 위암 3기 자료에 대해 항암치료의 효과를 비교하고 위암 생존율에 유의한 영향을 미치는 요인을 알아보고자 한다. 본 연구에서 분석한 위암 3기 자료는 비례위험 가정이 성립하지 않아 대안으로 제한된 평균 생존시간을 이용한 분석 방법을 자료 분석에 적용하였다. 의사-관측들을 이용하여 제한된 평균 생존시간을 추정하였고, 제한된 평균 생존시간 추정량에 기반한 검정통계량을 이용하여 항암치료의 효과를 파악하였다. 일반화 선형모형을 이용한 회귀모형을 통해 위암 3기 환자의 평균 생존시간에 유의한 영향을 미치는 공변량들의 효과를 추정하였다. 항암치료법에 따라 위암 3기 환자의 평균 생존시간에 유의한 차이가 있음을 확인하였고, 진단연령, 인종, 세분화병기, 분화도, 종양의 크기, 수술여부, 항암치료가 위암 3기 환자의 평균 생존시간에 유의한 영향을 미치는 요인들이였으며, 그 중 수술여부가 위암 3기 환자의 평균 생존시간을 늘리는데 가장 큰 영향을 미치는 요인임을 확인하였다. The purpose of this study is to compare the effects of treatment on stage III stomach cancer data obtained from the SEER program of the National Cancer Institute and to identify the significant risk factors for the survival rates of stage III stomach cancer. Since the proportional hazards assumption was violated for treatment, we used the restricted mean survival time as an alternative to the proportional hazards model. The restricted mean survival time was estimated using pseudo-observations, and the effects of treatment were compared using a test statistic based on the estimated restricted mean survival times. We conducted the regression analysis using a generalized linear model to investigate the significant predictors for the restricted mean survival time of patients with stage III stomach cancer. We found that there was a significant difference between the restricted mean survival times of treatment groups. Age at diagnosis, race, substage, grade, tumor size, surgery, and treatment were significant predictors for the restricted mean survival time of patients with stage III stomach cancer. Surgery was the most significant predictor for increasing the restricted mean survival time of patients with stage III stomach cancer.

Value of the Post-Operative CT in Predicting Delayed Flap Failures Following Head and Neck Cancer Surgery

김빛나,윤대영,서영란,박민우,권기환,노영수,정철훈 대한영상의학회 2017 Korean Journal of Radiology Vol.18 No.3

Objective: To identify post-operative computed tomography (CT) findings associated with delayed flap failures following head and neck cancer surgery. Materials and Methods: We retrospectively reviewed 60 patients who underwent flap reconstruction after head and neck cancer surgery and post-operative (3–14 days) contrast-enhanced CT scans for suspected complications. Patients were divided into two groups: delayed flap failure patients (patients required flap revision) (n = 18) and flap success patients (n = 42). Clinical data (age, sex, T-stage, type of flap, and time interval between reconstruction surgery and CT) and post-operative CT findings of flap status (maximum dimension of the flap, intra- or peri-flap fluid collection and intra- or peri-flap air collection, fat infiltration within the flap, fistula to adjacent aerodigestive tract or skin, and enhanced vascular pedicle) were assessed and compared between the two groups. Results: CT findings showed that the following flap anomalies were observed more frequently in the delayed flap failure group than in the flap success group: intra- or peri-flap fluid collection > 4 cm (61.1% vs. 23.8%, p < 0.05), intra- or peri-flap air collection > 2 cm (61.1% vs. 2.4%, p < 0.001), and fistula to adjacent aerodigestive tract or skin (44.4% vs. 0%, p < 0.001). The maximum dimension of the flap, fat infiltration within the flap, and enhanced vascular pedicle were not associated with delayed flap failures. Conclusion: A large amount of fluid or air collection and fistula are the CT findings that were associated with delayed flap failures in patients with suspected post-operative complications after head and neck cancer surgery.

박막 BIPV창의 온도변화와 발전성능 상관관계에 관한 실측연구

김빛나,윤종호,신우철,Kim, Bit-Na,Yoon, Jong-Ho,Shin, U-Cheul 한국태양에너지학회 2012 한국태양에너지학회 논문집 Vol.32 No.suppl3

This research on building Integrated Photovoltaic System replacing windows and doors with amorphous silicon thin film PV windows and doors installing same exact mount on Mock-up. The windows and doors should be installed in different angle and bearing so that we can analyse the amount of electricity from them. The objective of the research is to evaluate and investigate the relationship between factors(intensity of solar radiation, PV window surface temperature, incidence angle, and sky conditions) that affects performance of PV window and performance. The range and method of this research is to establish monitoring system and analysis the data from the monitoring system to evaluate the performance of PV windows that have thin film of solar battery. We should evaluate the insolation according to the position of PV window, output, and surface temperature according to months and seasons so that we can figure out the relationship between these. And we should investigate the relationship between performance and efficiency according to incidence angle and sky condition so that we can figure out the correlation between factors and performance.

Variation in the Numbers of Red Blood Cell Units Transfused at Different Medical Institution Types from 2006 to 2010 in Korea

김빛나,김형수,이건세,장성훈,허미나,강종원,김신영,이상원,김영은 대한진단검사의학회 2013 Annals of Laboratory Medicine Vol.33 No.5

Background: This study aimed at assessing the number of red blood cell (RBC) units transfused at different types of medical institution and examining the characteristics of transfusion recipients. Methods: We calculated and compared the number of transfusion recipients, total RBC units transfused, and RBC units transfused per recipient. Study data were extracted from insurance benefits reimbursement claims for RBC units at the Health Insurance Review &Assessment Service from 2006 to 2010. Results: Between 2006 and 2010, the number of recipients of RBC units increased from 298,049 to 376,445, the number of RBC units transfused increased from 1,460,799 to 1,841,695, and the number of RBC units transfused per recipient changed from 4.90 to 4.89. The number of recipients aged ≥65 yr increased from 133,833 (44.9%) in 2006 to 196,127 (52.1%) in 2010. The highest number of RBC units was transfused to patients with neoplastic diseases (31.9%) and diseases of the musculoskeletal system and connective tissue (14.4%). More than 80% of the total number of RBC units were transfused at tertiary and general hospitals. However, this composition rate was slightly decreasing,with the composition rate for hospitals increasing from 12.6% to 16.3%. Conclusions: This study revealed an increase in the number of RBC units transfused over a 5-yr period due to an increase in the number of transfused recipients, especially recipients aged ≥65 yr; moreover, the number of RBC units transfused differed based on medical institution type. These results provide fundamental data on RBC transfusions required for future research.