산대셈 개방법(開方法)에 대한 《산학정의》의 독자적 성취: 어림수[상(商)] 배열법 개선을 통한 증승개방법(增乘開方法)의 정련(精鍊)

강민정,Kang, Min Jeong 한국수학사학회 2018 Journal for history of mathematics Vol.31 No.6

The KaiFangFa開方法 of traditional mathematics was completed in ${\ll}$JiuZhang SuanShu九章算術${\gg}$ originally, and further organized in Song宋 $Yu{\acute{a}}n$元 dinasities. The former is the ShiSuoKaiFangFa釋鎖開方法 using the coefficients of the polynomial expansion, and the latter is the ZengChengKaiFangFa增乘開方法 obtaining the solution only by some mechanical numerical manipulations. ${\ll}$SanHak JeongEui算學正義${\gg}$ basically used the latter and improved the estimate-value array by referring to the written-calculation in ${\ll}$ShuLi JingYun數理精蘊${\gg}$. As a result, ZengChengKaiFangFa was more refined so that the KaiFangFa algorithm is more consistent.

《구장술해》를 통한 《구장산술》의 이해 -방전장(方田章) 전반부의 용어와 어구의 의미를 중심으로 개념의 발달 과정에 주의하여-

강민정,KANG, Min Jeong 한국수학사학회 2015 Journal for history of mathematics Vol.2 No.1

We discuss several issues relating to the meaning of the terms and phrases in the first half of Chapter One fang tian 方田章 of ${\ll}$Jiuzhang suanshu九章算術${\gg}$. I understood those issues more clearly in the course of the translation of ${\ll}$Kujang sulhae 九章術解${\gg}$. Those are '今有' in the beginning of each problem, '積' and '冪' in the method of square field 方田術, '齊' in the method of reduction to a common denominator 齊同術, '經' and '有分者通之重有分者同而通之' in the method of dividing fraction 經分術, '實如法而一' in the calculation using the rods, '兩邪' in the method of trapezium field with a perpendicular side 邪田術. We may find out the value of ${\ll}$Kujang sulhae 九章術解${\gg}$ through our discussion.

서울 일부 지역 노인의 체지방률, 허리둘레와 체질량지수에 의한 비만 분류 및 만성질환 유병율과의 연관성

강민정,박정영,김정연,이연주,도민희,이상선,Kang, Min Jeong,Park, Jung Young,Kim, Jung Yun,Lee, Yeon Joo,Do, Min Hee,Lee, Sang Sun 한국식품영양학회 2014 韓國食品營養學會誌 Vol.27 No.3

The purpose of this study was to compare the validity of obesity indices among the body mass index (BMI), waist circumference (WC), and body fat percentage (BF%), and to determine which is the most useful index to predict the risk of chronic diseases of elderly people. This study was conducted as a cross-sectional study at welfare centers in Seoul. The total number of subjects was 261 (68 men and 193 women) with age ${\geq}60$ years. The distribution of obesity using 3 obesity indices in the subjects with hypertension, diabetes, or arthritis was BF%>WC>BMI in elderly men and WC>BF%>BMI in elderly women. In elderly women, odds ratios (ORs) for hypertension in BMI and WC quartiles were significantly increased in quartile 2 and 3 (p<0.05). The ORs for hypertension, hyperlipidemia, and arthritis in BF% quartiles were significantly increased in quartile 3 and 4 (p<0.05). The BF% was sensitive obesity index for predicting the occurrence of chronic disease in men, and the WC was sensitive index in women. Our results suggested maintaining BMI less than $23.5kg/m^2$, WC less than 82 cm, and BF less than 35% in order to prevent chronic diseases in elderly women.

《산학정의(算學正義)》 〈대연(大衍)〉에 나타난 대연구일술(大衍求一術)의 구조

강민정,Kang, Min-Jeong 한국수학사학회 2021 Journal for history of mathematics Vol.34 No.5

The simple simultaneous linear congruence equation solution in 《Sunzi Suanjing孫子算經》 has developed into a systematic general solution in 《Shuxue Jiuzhang數書九章》. The most important parts of it is the creation of the Dayan Qiuyishu大衍求一術. The reason why 《Sanhak Jeongeui算學正義》 deals with the Dayanshu大衍術 which has lost its practicality in the calculation of astronomical calendar, is that one of the best achievement of traditional mathematics cannot be omitted. It is written with an emphasis on the disclosure of the calculation principle. It shows that Nam Byeong-gil南秉吉 and Lee Sang-hyeok李尙爀 had a fairly structural understanding of the Dayan Qiuyishu.

친환경 세척제의 처리 방법을 달리하여 착즙한 당근 주스의 미생물 안전성 및 품질

임상욱(Sang-Wook Lim),최다정(Da-Jeong Choe),강민정(Min-Jung Kang),김종현(Jong-Hyun Kim),김묘정(Myo-Jeong Kim),김민주(Min-Ju Kim) 한국식품영양과학회 2017 한국식품영양과학회지 Vol.46 No.10

본 연구에서는 당근의 세척에 사용되는 친환경 세척제의 초기 미생물 제어 효과를 향상시키기 위해 탄산수소나트륨과 구연산의 단독 및 병합 처리 조건을 설정하였으며 저장 중 당근 주스의 미생물 수 및 품질 특성 변화를 분석하였다. 친환경 세척제의 단독 처리 방법으로는 0.5, 1, 2% 탄산나트륨수와 0.2, 0.5, 1% 구연산수를 적용하였고, 살균 효과를 비교하기 위해 무처리구, 수돗물 처리구, 50 ppm 차아염소산나트륨 처리구를 사용하였다. 당근의 세척을 위한 병합처리 방법으로는 단독 처리에서 우수한 살균 효과를 나타낸 1% 탄산수소나트륨수와 1% 구연산수를 이용하였고, 1% 탄산수소나트륨수 처리 후 1% 구연산수로 처리하는 단계적 병합 처리구가 가장 우수한 살균 효과를 나타내었다. 1% 탄산수소나트륨수와 1% 구연산수의 단계적 병합 처리구는 무처리구에 비해 일반 세균수 1.87 log CFU/mL, 대장균군 1.56 log CFU/mL를 감소시켰고, 50 ppm 차아염소산수에 비해서도 일반 세균수 1.07 log CFU/mL, 대장균군 0.22 log CFU/mL의 미생물 감균효과를 나타냈다. 1% 탄산수소나트륨수 처리 후 1% 구연산수의 단계적 병합 처리구를 4°C에서 7일 동안 저장한 결과 수돗물, 50 ppm 차아염소산수나 혼합 병합 처리구, 1% 구연산수 처리 후 1% 탄산수소나트륨 처리구에 비해 미생물 제어 효과가 확실하게 나타났지만, pH, 당도, 산도, 색도에는 유의적인 차이가 나타나지 않았다. 본 연구 결과 1% 탄산수소나트륨과 1% 구연산의 단계적 병합 처리는 당근 세척 시 초기 미생물 제어와 품질 유지에 있어 효과적인 살균처리 방법으로 비가열 당근 주스의 유통기간 동안 미생물 안전기준에 부합하며 주스의 품질을 유지할 수 있는 바람직한 세척방법으로 판단된다. The aim of this study was to evaluate the microbial inhibitory activity and physicochemical quality of fresh carrot juice prepared with different environmentally-friendly washing methods during low temperature storage. Individual and combined treatments with sodium bicarbonate (baking soda, NaHCO₃) and citric acid were applied to carrots for 10 min. Tap water and 50 ppm of sodium hypochlorite (NaOCl) were used as the control. Combined treatment of 1% NaHCO₃ and 1% citric acid significantly reduced total aerobic counts and coliforms. In addition, combined treatment of 1% NaHCO₃ and 1% citric acid inhibited microbial growth for 7 days at 4°C and 10°C in a shelf-life study. There were no significant differences among the sanitizers in terms of °Brix, acidity, pH, and color. Changes in physicochemical quality were not significantly different by sanitizer but were affected by storage temperature. These results indicate that washing with combined treatment of 1% NaHCO₃ and 1% citric acid is an effective method to inhibit the microbial population and maintain physicochemical quality. Therefore, combined treatment of 1% NaHCO₃ and 1% citric acid can be effectively used to sanitize and prepare carrot juice without affecting other properties.

소부혈(少府穴) 자침(刺鍼)이 Kainic Acid로 유도(誘導)된 간질(癎疾) 동물(動物)모델의 해마(海馬) 치상회(齒狀回)에 미치는 영향(影響)

김승태 ( Seung Tae Kim ),정주호 ( Joo Ho Chung ),정우병 ( Wu Byung Jeong ),김장현 ( Jang Hyun Kim ),강민정 ( Min Jung Kang ),홍미숙 ( Mee Sook Hong ),박해정 ( Hae Jeong Park ),김연정 ( Yeon Jung Kim ),박히준 ( Hi Joon Park ),이혜 대한경락경혈학회 2007 Korean Journal of Acupuncture Vol.24 No.4

Objectives: Epilepsy is one of the most common serious brain disorders that affect people of all ages, and it is characterized by recurrent unprovoked seizures. We examined whether acupuncture can reduce both the incidence of seizures and hippocampal cell death in dentate gyrus (DG) using a mouse model of kainic acid (KA)-induced epilepsy. Methods: ICR mice (20~25g) were given acupuncture once a day at acupoint HT8 (sobu) bilaterally during 2 days before KA injection. After an intracerebroventricular injection of 0.1μg of KA, acupuncture treatment was subsequently administered once more (total 3 times), and the degree of seizure was observed for 20 min. Three hours after injection, we confirmed the neural cell death using cresyl violet staining and silver impregnation staining, and determined the expressions of c-Fos and glutamate decarboxylase (GAD)-67 using immunohistochemistry techniques in the DG. Results: KA induced epileptic seizure, neural cell death, increased c-Fos expression and decreased GAD-67 expression in the DG. Acupuncture treatment at HT8 reduced the severity of the epileptic seizure and inhibited neural cell death from KA. In addition, acupuncture normalized the expressions of c-Fos and GAD-67 in the same areas. Conclusions: These results demonstrated that acupuncture treatment at HT8 may reduce the KA-induced epileptic seizure and neural cell death in the DG possibly by normalizing c-Fos expressions and the gamma-aminobutyric acid neurons.

K-POP 커버댄스 운동이 청소년 폭력 관련 심리 변인 및 혈중 호르몬 농도에 미치는 영향

서태범(Tae-Beom Seo),김영숙(Young-Sook Kim),김유미(Yu-mi Kim),강민정(Min-Jeong Kang),서경호(Kyeong-Ho Seo),박해찬(Hae-Chan Park) 한국생활환경학회 2015 한국생활환경학회지 Vol.22 No.5

The purpose of this study was to examine the effect of K-POP cover dance on violence related psychological factors, blood hormones, and neurotransmitters in adolescents. Participants in this study were 30 males and females taken blood sample and surveyed. All participants were performed K-POP cover dance (50~75%MHR, 80 min/day, 3days/week) during 8 weeks. School stress, assumed stress, interpersonal stress, ego stress were composed the stress factors. Body and verbal aggression, propriety, anger were composed aggression factors. School stress, assumed stress, interpersonal stress, ego stress were decreased significantly on K-POP cover dance. Also, body and verbal aggression, propriety, doubt, anger were decreased significantly on K-POP cover dance. Cortisol, melatonin, beta-endorphin, serotonin, dopamin were composed violence related blood factors. Cortisol were decreased significantly, but melatonin and dopamin were no significantly on K-POP cover dance. It is concluded that K-POP cover dance caused positive effects on violence and stress, stress related blood hormones.

꿈에 관한 문헌 연구

강민정 ( Min Jeong Kang ),이승환 ( Seung Hwan Lee ),임정화 ( Jung Hwa Lim ),성우용 ( Woo Yong Seong ) 대한한방신경정신과학회 2011 동의신경정신과학회지 Vol.22 No.4

This study explores perspectives, reasons, functions of dreams in order to develop a treatment model. Methods: We searched CNKI, KISS, NDSL. Papers published since 2002, which are classified in categories. Results: 1. The Recognitions about the dream of Oriental Medicine is based on 『Hwangjenaegyeong-Eumsabalmong(黃帝內經·淫邪發夢)』. 2. By each era, There are a variety of etiological causes, stages. 3. Dreams are generated by the internal stimuli-Physiological activities of the Jangbu(臟腑), Deficiencies of yin and yang(陰陽), Pathological changes in the Jangbu(臟腑), Pathology products-, external stimuli-Yukeum(六淫), Eumsiksang(飮食傷)-, and unusual feelings. 4. Spirit(神) comes from brain(腦), not heart(心). So what we call brain-spirit(腦神) is right. Dreams are the mental activity related to the brain. 5. Dreams are the reflection of the pathological changes of the human body. And it shows the development, changes and prognosis of disease. Dreams sometimes illustrate the incidence of the disease. Conclusions: We organized perspectives, Causes and Functions of dreams mentioned in Oriental Medicine Literatures. Health is closely related to the dream. Therefore, we propose that the dream is worth for the diagnosis and treatment in oriental medicine.

익산 입점리 고분 출토 금동식리 복원제작 연구

강민정(Kang Min jeong),이현상(Lee Hyun sang),정광용(Chung Kwang yong) 한국조형디자인협회 2017 조형디자인연구 Vol.20 No.1

백제시대 금동식리는 한성기 초반부터 웅진기에 걸쳐 주요한 위세품으로 제작당시의 사회상과 예술성, 그 시대의 공예기술 수준을 알 수 있는 귀중한 자료이다. 금동식리에는 단조기법, 투조기법, 조금기법, 타출기법, 도금기법 등 각종 금속공예기법이 포함되어 있다. 금동식리를 대상으로 한 선행연구는 투조, 조금, 영락 등 장식적 특징이 많은 금동식리가 주를 이루고 있으며, 익산 입점리 고분 출토 금동식리와 같이 타출기법으로만 제작된 식리의 기법연구는 미흡하다. 따라서 전면(全面)에 타출기법만으로 장식된 입점리 금동식리의 복원제작을 통해 백제시대 금동식리의 새로운 공예기법양상을 연구함으로써 그 가치를 높일 수 있을 것으로 판단된다. 제작에 앞서 유물실측을 바탕으로 복원도면을 제작하고 모델링 작업을 진행하였으며, 평면가공은 복원의 신뢰도를 높이기 위해 모의실험을 통한 기법 관찰을 실시하였다. 현재까지 출토된 백제시대의 금동식리는 일반적으로 바닥판과 양측판을 포함한 3장의 금속판으로 제작된다. 입점리 금동식리는 형태와 바닥판 스파이크 또한 완형에 가까운 형태를 유지하고 있다. 우측식리의 측면이 일부 훼손된 상태이나 좌측판과 비교를 통해 형태 추정이 가능하다. 입점리 금동식리의 복원제작은 크게 유물 실측, 도면 제작, 외형절단, 평면가공(문양타출), 입체가공(형태성형), 스파이크 제작, 아말감 도금, 결합 순서로 진행하여 복원품을 완성하였다. 입점리 고분 출토 금동식리는 이전시기에 제작된 금동식리와는 달리 표면장식기법이 타출(打出)기법으로만 제작되는 새로운 양상을 보였으며, 이는 변화하는 당시 식리문화의 단면을 볼수있는 중요한 유물이다. 본 연구를 통해 고대기술을 재현함으로써 제작기법 규명 및 문화재 복원제작의 진정성을 확보하고자 하였다. Baekje gilt-bronze shoes is the crucial relic to show the craft technique of Baekje dynasty. Gilt-bronze shoes is fabricated by a variety of the metal craft techniques which are forging, repousse, metal carving, plating etc. The gilt-bronze shoes excavated in the ancient tomb, ibjeom-ri, iksan, which decorated by repousse technique, can inform the newly generated craft technique trend. First of all, the restoration drawing was made, and then the process modeling was proceed through actual survey. And the simulation of the surface manufacturing have done to improve reliability of the restoration. The gilt-bronze shoes in ibjeom-ri, iksan is the one maintained well among the Baekje gilt-bronze shoes, The restoration of the gilt-bronze shoes excavated in the ancient tomb, ibjeom-ri, iksan is completed by actual survey, drawing, cutting, surface manufacturing, three-dimensional manufacturing, spike manufacturing, amalgam plating in sequence. Relic is the one that shows the life style of the ancient period exactly. This study can find manufacturing techniques and restoring production process of cultural heritage by analyzing repousse techniques and reproducing ancient technology

연구논문 : 충남지역 고학년 초등학생 학부모의 전통음식에 대한 인식과 선호도 -떡, 한과, 전통음료를 중심으로-

강민정 ( Min Jeong Kang ),지옥회 ( Ok Hwa Jhee ) 한국식생활문화학회 2014 韓國食生活文化學會誌 Vol.29 No.3

In terms of awareness of Korean traditional food, elementary students are most affected by their parents. The objective of this study was to analyze upper grade elementary students` parental awareness and preference of Korean traditional foods in the Chungnam Area. In a syrvey of 126 parents. 58% of subjects were interested in Korean traditional foods, but there was no significant difference according to age. About 87% of parents thought that inheritance of knowledge on Korean traditional foods was needed. The reasons for inheritance of knowledge on Korean traditional foods were ``TO stick to style of Korean traditional foods``(68.2%),; palatable``(21.8%),``Education for children``(6.4%),and ``Beautiful and fine custom``(3.6%).The awareness point of "Korean traditional foods are easy for cooking`` increased with increasing age(p<0.01).In all age groups. subjects highly recognized that Koreab traditional foods are good for health. There were significant correlations between overall preferences for Tteok and Hankwa(r=0.351,p=0.001), Hankwa and Korean traditional drink(r=0.374,p=0.001),and Korean traditional drink and Treok (r=0.406,p=0.001),As a result, preferences for other items also increased when preference for one of the three teaditional foods increased. Therefore, education on Korean traditional foods is necessary in order to satisfy parental preferences.