시 · 청각 인지능력 향상을 위한 공감각 기반 입체영상-입체음향 변환 시스템

배명진(Myung-Jin Bae),김성일(Sung-Il Kim) 한국디지털콘텐츠학회 2022 한국디지털콘텐츠학회논문지 Vol.23 No.1

단침보강세라믹공구를 이용한 금형강(SKD61)의 선삭가공 시 표면거칠기에 영향을 미치는 인자 및 회귀방정식 도출

배명일(Myung-Il Bae),이이선(Yi-Seon Rhie),김형철(Hyeung-Chul Kim) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.4

In this study, we turning mold steel (SKD61) using whisker reinforced ceramic tool (WA1) to get affected factor to surface roughness and regression equation. For this study, we adapt system of experiments. Results are follows; From the analysis of variance, it was found that affected factor to surface roughness was feed rate, cutting speed, depth of cut in order. From multi-regression analysis, we calculated regression equation and the coefficient of determination(R²). R² was 0.978 and It means regression equation is significant. Regression equation means if feed rate increase 0.039㎜/rev, surface roughness will increase 0.8391㎛, if cutting speed increase 50m/min, surface roughness will decrease 0.034㎛, if depth of cut increase 0.1㎜, surface roughness will increase 0.0203㎛. From the experimental verification, it was confirmed that surface roughness was predictable by system of experiments.

PCB 드릴링용 스핀들을 위한 공기 베어링의 최적 설계

배명일(Myung Il Bae),김기수(Ki Soo Kim),이영호(Young Ho Lee) 대한공업교육학회 2001 대한공업교육학회지 Vol.26 No.1

In this study, The stiffness are analyzed aerostatic thrust and radial bearing for PCB drilling using system of experiment. The results are as follows: the stiffness of aerostatic thrust bearing are affected by input air pressure, clearance, number of nozzle. Also, the stiffness of aerostatic radial bearing are affected by input air pressure, diameter of nozzle, length of bearing. A recommended design conditions for aerostatic thrust bearing are as follow: input air pressure 7kg_f/㎠, clearance 0.02㎜, diameter of nozzle 0.2㎜, number of nozzle 7, bearing inner diameter 26㎜ and input air pressure 7kg_f/㎠, clearance 0.015㎜, diameter fo nozzle 0.2㎜, bearing length 45㎜, distance of nozzles 10.5㎜ for aerostatic radial bearing.

가이드 로울러를 위한 공기베어링의 최적설계변수 설정

배명일(Myung Il Bae),김형철(Hyeung Chul Kim),성철현(Chul Hyun Seong),김기수(Ki Soo Kim) 대한공업교육학회 1999 대한공업교육학회지 Vol.24 No.2

In this study, We analyze stiffness of aerostatic bearing using system of experiment for design of magnetic tape manufacture guide roller system and prepare to fundamental design data. Results are following; Affected factors to air bearing stiffness are bearing clearance, bearing length, nozzle diameter, pressure of input air, length of between nozzel distance and optimal conditions of aerostatic bearing are bearing clearance 0.0175㎜, bearing length 45㎜, nozzle diameter 0.2㎜, pressure of input air 7kgf/㎠, length of between nozzle distance 10mm.

단침보강 세라믹 공구를 이용한 플라스틱 금형강(STAVAX)의 선삭가공

배명일(Myung-Il Bae),이이선(Yi-Seon Lee) 한국기계가공학회 2012 한국기계가공학회지 Vol.11 No.6

In this study, we turning plastic mold steel (STAVAX) against cutting speed, depth of cut, feed rate using whisker reinforced ceramic tool (WA1). To predict cutting force, analyze principal, radial, feed force with multi-regression analysis. Results are follows: From the analysis of variance, affected factor to cutting force feed rate, depth of cut, cutting speed in order and cutting speed was very small affect to cutting force. From multi-regression analysis, we extracted regression equation and the coefficient of determination(R2) was 0.9, 0.88, 0.856 at principal, radial and feed force. It means regression equation is significant. From the experimental verification, it was confirmed that principal, radial and feed force was predictable by regression equation.

기계구조용 탄소강(SM45C)의 단속절삭 시 절삭력예측을 위한 회귀방정식 도출

배명일(Myung-Il Bae),이이선(Yi-Seon Rhie) 한국기계가공학회 2016 한국기계가공학회지 Vol.15 No.4

Interrupted cutting has different cutting characteristics compared with continuous cutting. In interrupted cutting, the workpiece has a groove that regularly impacts the cutting tool and workpiece. Therefore, tool damage occurs rapidly, and this increases the cutting force and surface roughness. In this study, we performed interrupted cutting of carbon steel for machine structure (SM45C) using a coated carbide tool (TT7100). To predict the cutting force, we analyzed the experimental results with a regression analysis. The results were as follows: We confirmed that the factors affecting the principal force and radial force were cutting speed, depth of cut, and feed rate. From the multi-regression analysis, we deduced regression equations, and their coefficients of determination were 89.6, 89.27, and 28.27 for the principal, radial, and feed forces, respectively. This means that the regression equations were significant for the principal and radial forces but not for the feed force.

콘크리트 믹서 트럭용 믹서 감속기의 차동 유성 기어 트레인에 대한 위험속도 해석

배명호(Myung Ho Bae),배태열(Tae Yeol Bae),김당주(Dang Ju Kim) 유공압건설기계학회 2017 드라이브·컨트롤 Vol.14 No.1

The power train of a concrete truck mixer reducer includes differential planetary gears to get a large reduction ratio for operating the mixer drum in a compact structure. These differential planetary gears are a very important part of the mixer reducer where strength problems are the main concern. Gear bending stress, gear compressive stress and scoring failure are the main concerns. Many failures in differential planetary gears are due to the insufficient gear strength and resonance problems caused by major excitation forces such as gear mating failure in the transmission. In the present study, where the excitation frequencies are the gear tooth passing frequencies of the mating gears, a Campbell diagram is used to calculate differential planetary gear critical speeds. Mode shapes and natural frequencies of the differential planetary gears are calculated by CATIA V5. These are used to predict gear resonance failures by comparing the working speed range with the critical speeds due to the gear transmission errors of the differential planetary gears.

색-청 공감각 인지 기반 사운드-컬러 신호 실시간 변환 시스템의 구현

배명진(Myung-Jin Bae),김성일(Sung-Ill Kim) 한국콘텐츠학회 2015 한국콘텐츠학회논문지 Vol.15 No.12

본 논문은 공감각의 한 부분인 색청(colored-hearing) 공감각을 이용한 사운드-컬러 신호 변환에 관한 연구로서, 인간이 인지 할 수 있는 오감 중 공감각적 변환이 가장 많이 일어나는 청각과 시각을 이용한 실시간 변환 시스템의 구축을 목표로 한다. 본 논문에서 제안하는 음-색 실시간 변환 방법으로서, 입력으로 사용하는 MIDI(Musical Instrument Digital Interface) 신호에서 음계(scale), 옥타브(octave) 및 음의 세기(velocity)를 추출한 후 HSI 컬러모델의 기본 요소인 색상(hue), 명도(intensity) 및 채도(saturation)에 각각 대응하여 변환하는 방법으로 단순하지만 직관적인 방법을 사용한다. 변환된 HSI 컬러 모델은 모니터 출력을 위해 RGB 컬러 모델로 최종 변환하여 출력한다. 실험에서, MIDI 입력신호 전송 H/W 시스템과 VC++ 기반 해당 사운드-컬러 변환 입·출력 S/W 모니터링 시스템을 구축하여 사운드에서 컬러로의 출력이 제안한 방식에 따라 값이 출력됨을 확인하였다. This paper presents a sound into color signal conversion using a colored-hearing synesthesia. The aim of the present paper is to implement a real-time conversion system which focuses on both hearing and sight which account for a great part of bodily senses. The proposed method of the real-time conversion of color into sound, in this paper, was simple and intuitive where scale, octave and velocity were extracted from MIDI input signals, which were converted into hue, intensity and saturation, respectively, as basic elements of HSI color model. In experiments, we implemented both the hardware system for delivering MIDI signals to PC and the VC++ based software system for monitoring both input and output signals, so we made certain that the conversion was correctly performed by the proposed method.

「부동산가격공시법」상 표준지공시지가의 적용 및 효력에 관한법적 문제

배명호(Bae, Myung-Ho) 한국토지공법학회 2019 土地公法硏究 Vol.86 No.-

2016. 1. 19. 이른바 감정평가 선진화 3법의 제ㆍ개정으로「부동산가격공시법」이 전면개정 되면서, 법 제8조 “표준지공시지가의 적용” 규정의 개정을 비롯하여, 부동산가격공시에 관한 규정이 대폭 개정되었다. 현행법 제8조는 1983년「국토이용관리법」의 개정으로 도입되었지만, 동 규정의 해석을 놓고 헌법재판소나 소관부서에서는 단지 국가 등이라는 특정 산정의 주체가 토지의 수용ㆍ사용보상 또는 국ㆍ공유지 취득ㆍ처분 등의 특정 산정의 목적을 위해 국토교통부장관이 공시하여 생산된 표준지공시지가를 적용할 수 있는 근거 규정으로 이해하고 있는데, 이는 문법적 해석에 맞지 않고 오히려 현행법 제8조가 국민의 재산권을 보호하는 감정평가제도의 취지에 반하기 때문에 국민의 재산권 보장을 침해하는 위헌적인 조항으로 이해된다. 연혁적으로 1983년 “국가에 의한 직접 산정”이 도입된 이 후 현재까지 약 34년이라는 연혁을 갖는 동안 본칙 규정의 핵심규정이지만, 실질은 사문화 내지 실효성이 없는 규정이다. 비교법적으로 日本의 「地価公示法｣」은 표준지공시가격(標準地公示価格)을 기준으로 국가 등이 직접 산정하는 규정을 두고 있지 않다. 법 제8조 단서 규정에 따라, 국가 등이 직접 산정하거나 감정평가액으로 산정한 지가에 대하여, 국가 등이 필요하다고 인정할 때를 판단하여, 가감 조정하여 적용하지도 않는다. 따라서 국가 등에 의한 지가의 직접산정 규정은 법규범으로서 실효성이 없다. 그리고 감정평가업자가 관계법령에 따라 감정평가를 하는 것처럼 국가 등이 행정목적을 위하여 표준지공시지가를 기준으로 토지가격비준표를 사용하여 지가를 직접 산정하는 방법은, 개별공시지가의 산정방법과 같은 것으로 헌법재판소는 이미 토지초과이득세에 대한 헌법불합치결정 등에서 개별공시지가 산정에 대하여 비판적인 견해를 견지하고 있다. 또한 비전문가인 국가 등의 수족인 공무원 등이, 감정평가업자가 산정한 지가에 대하여 불확정 개념으로서 필요하다고 인정할 때에, 동법이나 하위법령에 구체적인 기준이나 방법을 명시하지 않은 현행 법제도하에서, 행정실무상 가감 조정하여 적용하고 있지도 않다. 그리고 법 제8조 및 제9조 표준지공시지가의 적용 및 효력 규정이 본칙의 핵심규정이기 때문에, 「부동산가격공시법」 제3조의 표준지공시지가 조사ㆍ평가 및 공시권자 논란과 무관할 수 없다. 입법론으로 조사ㆍ평가와 조사ㆍ산정은 감정평가로 통일하여 규정할 필요가 있다는 입법과제도 제시하였다. 입법자는 입법론에서 제기한 법률 개정을 통하여 보다 더 헌법합치적으로 법률개선의무를 다하여야 한다. As of January 19, 2016 when 「Act on the Public Announcement of Real Estate Values」 was entirely amended through the establishment and amendment of the so-called three laws for Advancement of Real Estate Appraisal, the rules and regulations related to the announcement of real estate price were also amended in full scale, including the revision of the article 8, “The Application of Officially Announced Price of Representative Land”. Even though the article 8 of the current law was introduced in the amendment of ｢National Land Use and Management Act｣ in 1983, it has been used for the purpose of expropriation, use compensation of land or specific calculation for acquisition and sale of national and public lands by entities of specific calculations, such that it just serves as an applicable provisions by the Constitutional Court and authorities concerned to apply officially announced price of representative land announced and produced by the Minister of Land, Infrastructure, and Transport. However, interpreting the article 8 in this way is against literal interpretation, and rather it can be understood as unconstitutional because it infringes the property rights of citizens contradictory to the intent of the appraisal system which tries to protect the property rights of citizens. Since the “Direct Calculation by the governmental entities” has been implemented in 1983, it is a core regulation of this act which has about 34 years of history. But it is a no longer enforced, or ineffective regulation in reality. In terms of comparative law, 「Public Notice of Land Prices Act｣ of Japan does not have a regulation by which the governmental entities perform direct calculations based on officially announced price of representative land. According to the provisos to the article 8 of the act, the governmental entities can apply a new price by adjusting addition and subtraction when the governmental entities think it is needed without applying the land price calculated directly by the governmental entities or the land price calculated on the basis of appraisal price. Therefore, the regulation on the direct calculation of land price by the governmental entities has no effect as a legal norm. Just as appraisers appraise according to relevant regulations, the method of calculating the land price directly by the governmental entities based on officially announced price of representative land using the Land Price Index Table is the same as the calculation by individual officially announced prices. The Constitutional Court already holds negative stance against the individual officially announced price in such precedents as the decision of constitutional discordance related to excessively increased valuable land tax. Additionally, the governmental entities including non-expert government employees do not apply the adjustment of addition or subtraction to the price for convenience s sake in public administration practice even when the adjustment of addition or subtraction is needed for the land price calculated by appraisers under uncertainty because there aren’t any specific standards or manuals in the act or lower statutes. Since the article 8 and the article 9 of the act, the application and effect of officially announced price of representative land are the core provisions of this act, they cannot be irrelevant to the issues regarding inspection & assessment of officially announced price of representative land in the article 3 of 「APAREV」 and public notice. As for ‘de lege ferenda’, this study suggests a legislative task that Inspection & Assessment and Inspection & Calculation should be regulated as a unified form of appraisal. Legislators should fulfill their obligations to improve the laws to become more constitutional through amendment of laws suggested by ‘de lege ferenda’.

지게차용 기계유압식 무단변속기의 기어류에 대한 강도해석

배명호(Myung Ho Bae),배태열(Tae Yeol Bae),최성광(Sung Kwang Choi) 유공압건설기계학회 2016 드라이브·컨트롤 Vol.13 No.4

The power train of a hydro-mechanical, continuously variable transmission for forklifts makes use of hydro-static units, hydraulic multi-wet disc brakes & clutches, and complex helical & planetary gears. The complex helical & planetary gears are very important parts of the transmission because of a strength problem. In the present study, we calculated the specifications of the complex helical & planetary gear train, and analyzed the gear bending and compressive stresses of the gears. It is necessary to analyze the gear bending and compressive stresses thoroughly for optimal design of the complex helical & planetary gears with respect to cost and reliability. In this paper, we analyze the actual gear bending and compressive stresses of complex helical & planetary gears using the Lewes & Hertz equation, and we also verify the calculated specifications of the complex helical & planetary gears by evaluating the results of the data of allowable bending and compressive stress using the Stress vrs Number of Cycles curves of gears.