머신러닝 기반 음성분석을 통한 체질량지수 분류 예측 - 한국 성인을 중심으로

김준호,박기현,김호석,이시우,김상혁,Kim, Junho,Park, Ki-Hyun,Kim, Ho-Seok,Lee, Siwoo,Kim, Sang-Hyuk 사상체질의학회 2021 사상체질의학회지 Vol.33 No.4

Objectives The purpose of this study was to check whether the classification of the individual's Body Mass Index (BMI) could be predicted by analyzing the voice data constructed at the Korean medicine data center (KDC) using machine learning. Methods In this study, we proposed a convolutional neural network (CNN)-based BMI classification model. The subjects of this study were Korean adults who had completed voice recording and BMI measurement in 2006-2015 among the data established at the Korean Medicine Data Center. Among them, 2,825 data were used for training to build the model, and 566 data were used to assess the performance of the model. As an input feature of CNN, Mel-frequency cepstral coefficient (MFCC) extracted from vowel utterances was used. A model was constructed to predict a total of four groups according to gender and BMI criteria: overweight male, normal male, overweight female, and normal female. Results & Conclusions Performance evaluation was conducted using F1-score and Accuracy. As a result of the prediction for four groups, The average accuracy was 0.6016, and the average F1-score was 0.5922. Although it showed good performance in gender discrimination, it is judged that performance improvement through follow-up studies is necessary for distinguishing BMI within gender. As research on deep learning is active, performance improvement is expected through future research.

헬기 MRO 비즈니스의 잠재력

김준호,황창전,Kim, Joune ho,Hwang, Chang jeon 항공우주시스템공학회 2014 항공우주시스템공학회지 Vol.8 No.3

Since the global economic crisis in year 2008, the world civil helicopter market has been growing recently. According to the market outlook in the next decade, the demand of civil helicopter will be driven by the demand of Private & Corporate, Oil & Gas, Off-shore and EMS(Emergency Medical Service) usages. On the other side, the demand of military market will be driven by the modification and upgrading for life extension or performance enhancement than the new helicopter development for replacing old models. To summarize these situations, the demand of MRO(Maintenance, Repair & Overhaul) market has also been on the rise because of the demand due to above several usages in civil side and the life-extension in military side. Through the MRO market analysis for characteristics, developmental trends and a supply chain, this paper describes that the potential of MRO business is considerably large as a propulsive power of domestic helicopter industry. And also, it proposes the construction direction of MRO network because the domestic industry must make the developmental awareness and reliability a stepping-stone towards own helicopter.

죽여(竹茹)에 관(關)한 문헌적(文獻的) 고찰(考察)

김준호,조재빈,이준근,Kim, Jun-Ho,Jo, Jae-Bin,Lee, Jun-Keun 대한한의정보학회 2007 大韓韓醫情報學會誌 Vol.13 No.1

식물의 대사에 미치는 요소질소의 영향 (2) 대맥근에 (大麥根) 흡수된 후의 질소대사

김준호 (Joon Ho Kim) 한국식물학회 1962 Journal of Plant Biology Vol.5 No.2

KIM. Joon Ho (Dept. of Biology, Kongju Teacher`s College): The effects of urea nitrogen on the metabolism of plants. Ⅱ. The response of some nitrogen components of barley to urea and other nitrogen in water culture. Kor. Jour. Bot. V(2), 6-12. 1962. For the comparison with the previous paper (4) the present report deals with the absorption and metabolism of urea and other nitrogen ions in barley seedling absorbed through root. 1. The amount of nitrate in barley treated with urea reach it pcak on the 8 th day, NO_3 on the 4 th, NH_4 on the 6 th or 8th. respectively. 2. The ammonia content in urea group reaches its peak on the 6 th day but other groups on the 4 th day. The present data in the urea group show to shorten 4 days compared with that of the previous paper (4). 3. The content of total amide from the present data are gradually increased on all of the groups during this experiment. These are agreement with the result of the previous paper (4). 4. The alcohol soluble nitrogen in the urea group shows the similar tendency to the NaNO_3 group but reaches its peak 2 days later than in the (NH4)_2SO_4 group. 5. The content of total nitroaen in the urea series has the lowest amount at the beginning while the richest from the 4th day after. These would be explained on that the absorption of urea is delayed and the PH in the urea solution does not change, so called physiological neutralily. The author should like to express his sincere thanks to Prof. M. J. Lee of Seoul National University for his valuable advices.

기획특집_1 - 국내.외 태양광발전 현황 및 전망

김준호,Kim, Jun-Ho 환경보전협회 2010 환경정보 Vol.32 No.385

세계 태양광 시장은 2000년부터 꾸준히 상승세를 거듭해 오다 2007년부터 급성장하기 시작했다. 향후 온실가스 감축은 불가피하기에 태양광 발전은 대체에너지의 핵심으로 큰 비중을 차지할 것으로 전망된다. 선진국에서는 이미 지상을 넘어선 우주태양광발전사업을 추진하고 있는 것으로 알려져 있다. 지금까지 태양광산업은 에너지원에 비해 높은 발전단가 때문에 다른 산업들과 경쟁에 치중해 왔었다. 앞으로는 원가 절감 관련 기술개발과 함께 효율 등 성능개선을 위한 기술개발도 균형있게 이루어져야 할 것이다.

제시-자연의 가치인식과 국립공원 이용자세

김준호,Kim, Jun-Ho 한국자연공원협회 1976 한국자연공원 Vol.4 No.-

일본 북해도 낙농시찰 기행

김준호,Kim, Jun-Ho 한국종축개량협회 2007 種畜改良 Vol.12 No.3

우레탄기를 포함하는 벤조퀴논 / 디아민 중합체의 합성과 특성분석

김준호,노시태,김동국,이치규 ( Jun Ho Kim,Si Tae Noh,Dong Kook Kim,Chi Gyu Lee ) 한국공업화학회 1993 공업화학 Vol.4 No.4

용해성과 접착력을 향상하기 위하여 우레탄 그룹을 함유하는 디아민-퀴논 중합체를 합성하고 특성분석을 행하였다. 디이소시아네이트와 저분자량의 디올을 반응시켜 NCO말단 프리폴리머를 합성한 다음 NCO그룹을 아민으로 변화시켜 우레탄기를 함유하는 디아민을 제조하였다. 이때 NC0/0H몰 비율을 1.2에서 2.1까지 변화시켜 디아민 분자량을 변화시켰다. 이러한 디아민기를 함유하는 프리폴리머를 p-벤조퀴논과 반응시켜 디아민-벤조퀴논 중합체를 제조하였다. 중합체의 분석에는 분광분석기와 크로마토그래피를 이용하여 분자구조 분석과 분자량을 측정하였으며, 용해도와 열적 거동도 측정·검토하였다. To improve the solubility and adhesion strength of diamine-quinone polymers, urethane group was introduced into the polymer backbone. Urethane group containing polymeric diamines(UDA) were prepared firstly by the decarboxylation of the NCO group in NCO terminated prepolymer obtained from the reaction of MDI and 1.6-hexandiol. The reaction mole ratio of NC0/0H was changed from 1.2 to 2.1 to increase the molecular weight of diamine. From the addition reaction of UDA and p-benzoquinone in THF or DMSO solvent, five kinds of urethane group containing diamine/quinone polymers(PUAQ) were prepared according to the diamine used. IR, NMR, UV-visible spectroscopy and GPC were used to characterize the molecular structure and molecular weight of UDAs and PUAQs. Thermal analysis of polymer by DSC and TGA were carried out according to the molecular weight differency. Also solubility test of UDA and PUAQ with 10 different solvents were carried out to predict the coating property of the polymers.

점수를 통한 발굽과 보행의 상태

김준호,Kim, Jun-Ho 한국종축개량협회 2006 種畜改良 Vol.11 No.4

본 글은 Veeppro dairy management 11월호의 내용을 발췌하여 정리한 내용입니다.

IDT형 Lamb 파 센서에 의한 판상의 균열 검출

김준호,노용래,Kim, Jun-Ho,Roh, Yong-Rae 한국음향학회 2010 韓國音響學會誌 Vol.29 No.8

본 논문에서는 판 형상의 구조물에 발생한 균열의 형상과 개수 등을 진단할 수 있는 Inter-Digital Transducer (IDT)형 Lamb 파 센서를 제안하고 그 타당성을 실험적으로 검증하였다. IDT형 Lamb 파 센서는 기존의 패치형 압전 센서보다 작동 주파수의 조절이 용이하고, finger의 형상에 의해 지향성을 조절할 수 있다는 등의 장점이 있다. 본 논문에서는 무지향성을 가지는 환상형 IDT형 센서와 높은 지향성을 가지는 사각형 IDT형 센서를 설계, 제작하고, 이들에 의해 알루미늄 판을 전파하는 Lamb 파의 전파시간과 진폭의 변화를 측정, 분석하여 판 내에 발생한 균열의 길이, 개수 및 각도를 평가하고, 제안한 IDT 센서의 효용성을 고찰하였다. In this paper, an Inter-Digital Transducer (IDT) type Lamb wave sensor is proposed to estimate the geometry and number of cracks on a plate structure, and its validity is checked through experiments. This IDT type sensor is more readily controllable than conventional patch type piezoelectric sensors to modify its operation frequency and directionality by altering its finger patterns. In this work, omni-directional annular IDT and highly directional rectangular IDT sensors are designed and fabricated. The IDT sensors are used to diagnose the length, number and orientation of cracks on an aluminum plate by measuring the amplitude and time of flight of Lamb waves. The results are analyzed to discuss the efficacy of the IDT sensors.