블록체인 기반 AI 법인 등록제

전민규,황지연,나현숙 한국디지털정책학회 2020 디지털융복합연구 Vol.18 No.5

With the advancement of AI technology, legal status and regulation issues for AI robots, and the necessity of a robot registration system are emerging. Since the shape and activity area of AI robots will no longer be limited to hardware in one country, the definition and regulation of AI robots should be expanded to a comprehensive concept including software, and information about them should be securely managed and shared by governments around the world. From this perspective, we extend 'AI robot' to the concept of Juridical AI encompassing hardware and software, and propose a method to operate the Juridical AI registration system using a permissioned blockchain called Juridical AI Chain. Since blockchain is an internationally distributed database, operating such AI registration system based on the blockchain will be a way to effectively cope with the global problems caused by the commercialization of AI robots. AI 기술이 고도화됨에 따라 국내외에서 AI 로봇에 대한 법적 지위 및 규제 문제, 로봇등록제의 필요성이 대두되고 있다. AI 로봇의 형태 및 활동범위는 더 이상 한 국가내에 놓여진 하드웨어에 머물지 않을 것이므로, AI 로봇에 대한 정의 및 규제는 소프트웨어를 포함시킨 포괄적 개념으로 확장되어야하며, 이들에 대한 정보도 국제적으로 각국 정부가 안전하게 관리하고 공유할 수 있는 형태로 정의되어야한다. 본 연구는 이러한 관점에서 ‘AI 로봇’을 하드웨어와 소프트웨어를 포괄하는 AI 법인이라는 개념으로 확장시키고, (가칭) Juridical AI Chain이라는 허가형 블록체인을 이용해 AI 법인 등록제를 운영하는 방안을 제시한다. 블록체인은 각국 정부기관들의 관리 및 공유가 가능한 분산형 공유 장부이므로, 블록체인 기반 등록제의 운영은 AI 로봇의 상용화가 초래할 범세계적 문제들에 효과적으로 대처할 수 있는 방안이 될 것이다.

Development of interpolation-free PTV

전민규,도덕희,조경래 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.9

A new particle tracking velocimetry (PTV) algorithm, which has no interpolation process requirement, has been constructed. An affine transformation and a hybrid fitness function were used to obtain final vector fields. A match probability method (MPM)-based PTV algorithm was used to save calculation convergences. The constructed algorithm was tested with synthetic images using the numerical data of Taylor-Green vortex flow and experimental images for the flow of a rectangular body with Re = 5300. Results obtained by the constructed PTV algorithm were compared with those obtained by the conventional cross-correlation particle image velocimetry (PIV) and the MPM. Comparison results revealed that the constructed interpolation-free PTV (IFPTV) algorithm demonstrated better performance than the aforementioned PIV and PTV algorithms. Furthermore, the constructed PTV algorithm does not need an error removal and interpolation process, enabling easy processing in PTV calculations while providing high-resolution grid vectors.

Optical temperature measurement method of premixed flames using a multi-laser system

전민규,도덕희,Yoshihiro Deguchi 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.6

The temperature distribution of a methane-air premixed flame was measured by the optical measurement technique. The absorption line was decomposed through 3rd order polynomial analysis, and the simultaneous multiplicative algebraic reconstruction technique (SMART) algorithm was adopted for computed tomography-tunable diode laser absorption spectroscopy (CT-TDLAS) data reconstruction. Methane-air premixed combustion system was used to construct laminar and turbulent flames. A double tube structure was adopted to solve combustion instability factors that occur when turbulent flames are generated. To overcome the high-temperature measurement limitations of a single laser system, two types of distributed feedback (DFB) lasers were mixed and measured. The relative error in temperature was largely confirmed at the central location of the burner. It was about 1.22 % for the laminar flame and 14.47 % for the turbulent flame.

Development of measurement technique of explosive flame using an optical measurement method

전민규,Jeong-Woong Hong,Kyoungmin Kim,도덕희 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.12

It is essential in weapons systems to understand how much explosive power is applied according to various chemicals and methods of the explosion. In particular, to measure dynamic thermal phenomena and analyze thermal properties under high-temperature and highpressure conditions. Although many researchers have used thermocouples to measure the temperature during an explosion, this method has an error in the temperature measurement as the radiant heat flux increases. Another measurement method is needed to solve this problem. During an explosion in a shock tube, the temperature change was measured with a thermocouple and a pressure sensor. To solve the limitations of the thermocouple's measurement responsiveness in temperature measurement was compared with the TDLD (tunable diode laser detection) method. In the case of the TDLD method, the time to reach the peak was measured an average 0.0207 sec faster than the thermocouple. Moreover, the peak average temperature was 15.8 °C higher than that of the thermocouple.

리튬이온배터리 열폭주 조건에서 전해질 Dimethyl Carbonate(DMC) 반응 특성 분석

전민규,이은송,윤홍식,길상인,박현욱 한국산업융합학회 2022 한국산업융합학회 논문집 Vol.25 No.6

This study provides an investigating the electrolyte reaction characteristics during thermal runaway of a lithium-ion battery(LIB). Dimethyl carbonate(DMC) is known as the main substance that makes up the electrolyte. The mono-molecular decomposition characteristics of DMC were derived through numerical analysis. Cobalt oxide can release oxygen under high temperature conditions. Also, DMC is converted to CH4, H2, CO, and CO2. Especially, it was found that the decomposition of the DMC begins at a temperature range of 340-350℃, which dramatically increases the internal pressure of the LIB. In the by-products gases, the molar ratio of CO and CO2 changed according to the molecular structure of DMC and temperature conditions. The correlation of the [CO]/[CO2] ratio according to the temperature during thermal runaway was derived, and the characteristics of the reaction temperature could be estimated using the molar ratio as an indicator. In addition, the oxidation and decomposition characteristics of DMC according to the residence time for each temperature were estimated. When DMC is exposed to low temperature for a long time, both oxidation and decomposition may occur. There is possibility of not only increasing the internal pressure of the LIB, but also promoting thermal runaway. In this study, internal environment of LIB was identified and the reaction characteristics between the active materials of the cathode and electrolyte were investigated.

뉴럴네트워크를 이용한 비접촉식 선박 유공압 장치 고장감지 시스템

전민규,도덕희,오정수 해양환경안전학회 2013 해양환경안전학회 학술발표대회 논문집 Vol.2013 No.04

레이저 브레이징에서의 열유동 해석에 관한 연구

전민규,김원배,한국찬,나석주 대한용접접합학회 1995 대한용접·접합학회지 Vol.13 No.3

An advantage offered by brazing over fusion welding is that strong joints may be produced at relatively low heat input. To minimize the thermal effects and maintain the desired dimension of assemblies. the CO$_{2}$ laser beam can be applied to the brazed joint of pin and plate as a micro heat source. This paper presents a analysis model of the laser brazing process considering the laser beam mode and heat flow in brazed parts by using the finite element method. The simulation results were compared with the experimental results obtained from the infrared temperature sensing system. Based on these results, the proper process parameters were investigated to get a good joining quality. The influence of the beam mode change was examined with respect to the temperature distribution and joint quality.

Hepatoprotective Effects of Streptococcus thermophilus LM1012 in Mice Exposed to Air Pollutants

전민규,김태락,이지연,김현수,지요셉,Wilhelm H. Holzapfel,배동혁,최철웅,황용필 한국식품영양과학회 2020 Journal of medicinal food Vol.23 No.8

In this study, we explored whether the use of Streptococcus thermophilus LM1012 (TL-LM1012) as a safe probiotic exerts hepatoprotective effects by suppressing oxidative stress and inflammation in vitro and alleviating aspartate aminotransferase (AST), alanine aminotransferase (ALT), and lactate dehydrogenase (LDH) production in vivo. In a series of safety tests, TL-LM1012 was found to have a negative response to hemolysis and biogenic amines, as well as susceptibility to antibiotics. TL-LM1012 protected cell viability and suppressed cytotoxicity by inhibiting oxidative stress and induced heme oxygenase-1 and superoxide dismutase activity in a dose-dependent manner in diesel exhaust particulate matter (DEPM)-treated HepG2 cells. Moreover, proinflammatory cytokines, including tumor necrosis factor-α, interleukin (IL)-6, and IL-1β, were suppressed in DEPM-treated splenocytes. In DEPM-treated mice, oral administration of TL-LM1012 regulated AST, ALT, and LDH production in the serum after 14 days of treatment. These findings indicate that TL-LM1012, a safe probiotic, provides a potent preventive or therapeutic effect against liver disease caused by air pollution.

TiO2/r-Al2O3 함유 기상광반응에서의 악취성 NH3/H2S 혼합 gas의 분해 성능 평가

전민규,손연희,반지영,강미숙,정석진,홍종팔,주광태 한국공업화학회 2005 한국공업화학회 연구논문 초록집 Vol.2005 No.1

Blockchain-Based User-Participatory Game Update:Maze Escape Game Case

전민규,황지연,나현숙 한국게임학회 2019 한국게임학회 논문지 Vol.19 No.4

In this note, we propose a game system to fairly and transparently control and update game variables using blockchain. As an example, we present an Ethereum-based maze escape game, being the first blockchain-based maze game and the first attempt to control game level through blockchain. In this system, the level function computes maze level reflecting the amount of maze walls purchased/sold by users. Using blockchain for game management saves human and economic resources and prevents unfair practice of game developers unilaterally manipulating game level or item enhancement rate.