중학생을 위한 인공지능 과학 융합 교육 프로그램의 개발 및 적용: 음성분류학습을 통한 소리 개념변화와 인공지능에 대한 인식변화를 중심으로

김미나,김성백 한국컴퓨터교육학회 2024 컴퓨터교육학회 논문지 Vol.27 No.2

It is pointed out throughout society that education should also change by reflecting social changes to the future intelligent information society due to the development of artificial intelligence. Accordingly, research on educational programs that combine science and artificial intelligence has been steadily emerging recently. However, there is insufficient research to analyze the effectiveness of applying the developed convergence education program and transforming students' misconceptions into scientific concepts, simply remaining in the development of educational programs that combine science and artificial intelligence. After developing and applying an educational program that combines science and artificial intelligence, focusing on the concept of "sound" in science subjects and "voice classification learning" in artificial intelligence, this study analyzed the effect of changing the scientific concept of "sound" and the perception of artificial intelligence of middle school students. As a result of the analysis, it was found that in all items related to sound concept, student misconceptions had a significant effect on changing into scientific concepts. In addition, it was found that there was a significant improvement in the change in students' positive perception of artificial intelligence. Therefore, the artificial intelligence science convergence education program developed in this study can be used as basic data to change the perception of artificial intelligence while being effective in changing the concept of science.

육류대체소재를 활용한 무슬림용 HMR 제품 개발

김미나,서향임,장한수 한국식품영양과학회 2016 한국식품영양과학회 학술대회발표집 Vol.2016 No.10

KOSDAQ50주가지수 선물시장의 발전과제

김미나,배흥규 동아대학교 사회과학대학 2003 사회과학논집 Vol.22 No.1

Physical and Verbal Violence in “Dry September”

김미나 대한영어영문학회 2017 영어영문학연구 Vol.43 No.4

“Dry September” is one of Faulkner’s work which deals with violence in black and white relationship. In the story, a black man is accused of raping a white lady by rumor and is killed by an angry white lynching mob. Minnie, the lady, is a spinster who fails to perform the gender roles assigned by the Southern society, and she is believed to have told a lie in order to get back attention and past glory. Although Minnie is hidden behind the physical violence by the white mob, she is unquestionably the underlying cause of the brutal death. That is, her lie ignites the white men’s hostility against the black people and leads to the tragic ending. In this paper, therefore, Minnie’s lie is treated as a verbal violence together with men’s physical violence, and why she tells a lie is considered with her situation in the South. Lastly, Faulkner is thought to use violence to remind us of the evils of violence and to tell some important truth, not for the sake of violence.

T$_1$/T$_2$ maps 의 재구성을 위해 잡음의 표준편차를 이용한 수신 증폭률 보정

김미나,김성은,신승애,정은기 한국의학물리학회 1999 의학물리 Vol.10 No.3

현재 임상적으로 쓰이고 있는 T$_1$/T$_2$ 강조영상 (weighted image) 은 각각 다른 조직이나 정상/병변 조직 사이에 정성적인 대조도를 준다. T$_1$/T$_2$ 영상화 (mapping)는 영상의 각 화소신호랄 T$_1$/T$_2$ 시간으로 나타내는 방법으로 병변의 진행정도를 정량적으로 알 수 있다. T$_1$/T$_2$ 영상화 (mapping)를 얻기 위해서는 수신신호의 증폭률이 같아야 하는데, 일반적으로 MR 영상화 장비에서는 A/D converter 의 동적 구간을 최대 활용하기 위하여 입력신호를 최대 증폭하기 때문에 각각 다른 수신 증폭률을 사용할 수 있다. 이 논문에서는 최대 증폭한 경우와 수신증폭률을 보정한 경우의 T$_1$/T$_2$ 영상을 각각 얻고 측정된 T$_1$/T$_2$ 값을 비교하여 수신증폭률 보정이 T$_1$/T$_2$ 영상화에 어떠한 영향을 미치는지 분석하였다. 그 방법으로서 얻은 영상들이 각각 다른 수신증폭률을 가진 경우에 이를 보정하기 위해 잡음을 표준편차로 이용하는 방법을 사용하였다. 이렇게 얻어진 머리의 T$_1$/T$_2$ 영상은 이미 보고된 T$_1$/T$_2$ 의 값과 유사하였다. T$_1$/T$_2$ weighted images are being used to give the characteristic contrast among the various tissues and the norma;/abnormal tissues. Abnormalities in tissues, in general, accompany the biochemical changes and eventually structural ones in which results in the change in T$_1$ and T$_2$ relaxation times of water protons. It has been suggested that the mapping of T$_1$/T$_2$ values may serve as a possible tool for the quantitative evaluation of the degree of abnormality. On reconstructing T$_1$/T$_2$ maps(or any other MR parametric map), only corresponding variables are to be varied, such as TE for T$_2$, TI or TR for T$_1$ and b-factor for diffusion images. But often the receiver gain is taken for the optimal usage of A/D converter, so that the set of the image data has different receiver gain. It must be corrected before any attempt to reconstruct the maps. Here we developed method of correcting receiver gain variation effect, using the standard deviation of noise on individual image. The resultant T$_1$ and T$_2$ values were very comparable to the other reported values.

Gender-Specific Factors Associated with Suicide Attempts among the Community-Dwelling General Population with Suicidal Ideation: the 2013 Korean Community Health Survey

김미나,오경재,이영훈 대한의학회 2016 Journal of Korean medical science Vol.31 No.12

We identified traditional risk factors and investigated poorly understood risk factors for suicide attempts according to gender in a large Korean population. We analyzed the data from 6,768 males and 12,475 females with suicidal ideation obtained from the nationwide 2013 Korean Community Health Survey. The dependent variable was suicide attempts within the past year. There was a significant trend towards an increase in suicide attempts with decreasing age in both genders. Compared with those who were married, suicide attempts were significantly higher among those who were widowed, divorced, or separated for males (odds ratio [OR], 2.07; 95% confidence interval [CI], 1.34–3.20), but lower for females (OR, 0.66; 95% CI, 0.45–0.98). Current smoking and depression were significant risk factor for suicide attempts in males and females. However, monthly household income, myocardial infarction, and osteoporosis were significantly associated with suicide attempts only in males, whereas education level, recipient of National Basic Livelihood Security, family contact, leisure activity, and drinking frequency were significantly associated only in females. These findings indicate that gender difference should be considered in the assessment, prevention, and management of future suicide attempts by community policy-makers and clinicians.

흑보찰 분말 첨가에 따른 쿠키의 품질특성 및 항산화 활성

김미나,이지현,남진경,장혜원 한국식품과학회 2023 한국식품과학회지 Vol.55 No.6

In this study, the quality characteristics and antioxidant activity of cookies supplemented with the ‘Heukbochal’ barley powder were assessed according to the quantity of barley powder used (0, 15, 30, 45 and 60%). As the barley powder content in the cookies increased, there were decreases in pH value, hardness, spread factor, and loss rate, along with an increase in density and water content. The antioxidant capacities of 2,2-diphenyl-1-picrylhydrazyl and 2,2'-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) radicals also increased with higher barley powder content. In the consumer preference test, the sample supplemented with 45% barley powder received the highest scores for color, flavor, texture, and overall preference. Taking both consumer preference and antioxidant properties into consideration, the optimal mixture ratio was determined to be 45% barley powder in cookies.

Head to Head Comparison of Stress Echocardiography with Exercise Electrocardiography for the Detection of Coronary Artery Stenosis in Women

김미나,김수아,김용현,홍순준,박성미,신미승,김명아,홍경순,신길자,심완주 한국심초음파학회 2016 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.24 No.2

Background: Exercise-stress electrocardiography (ECG) is initially recommended for the diagnosis of coronary artery disease. But its value has been questioned in women because of suboptimal diagnostic accuracy. Stress echocardiography had been reported to have comparable test accuracy in women. But the data comparing the diagnostic accuracy of exercise-stress ECG and stress echocardiography directly are few. The aim of the study was to compare the diagnostic accuracy of exercise-stress ECG and dobutamine stress echocardiography (DSE) in Korean women. Methods: 202 consecutive female patients who presented with chest pain in outpatient clinic, and who underwent treadmill exercise test (TET), DSE and coronary angiography were included for the study. The diagnostic accuracy TET and DSE were calculated by the definition of > 50% or > 75% coronary artery stenosis (CAS). Results: The sensitivity and specificity were higher with DSE (70.4, 94.6%) than TET (53.7, 73.6%) for detection of > 50% CAS. The higher accuracy of DSE was maintained after exclusion of the patients who could not achieve over 85% age predicted heart rate before ischemia induction. DSE also showed greater diagnostic accuracy than TET by > 75% CAS criteria, and in subsets of patient with intermediate pretest probability. Conclusion: In the diagnosis of CAS, DSE showed higher accuracy than TET in female patients who presented with chest pain. As well as the test accuracy, adequate stress was more feasible with DSE than TET. These finding suggests DSE may be used as the first-line diagnostic tool in the detection of CAS in women with chest pain.

Considering Revision the Criteria for Patients under Investigations for MERS-CoV Infections: Diarrhea or Not

김미나,김의종 대한의학회 2018 Journal of Korean medical science Vol.33 No.53

국내 3차 및 대학병원에서의 결핵균 검사 실태조사

김미나,이선화,양성은,배직현 대한임상병리학회 1999 대한임상병리학회지 Vol.19 No.1