스마트 물류자동화를 위한 분류 로봇의 구현

박지호,김동식 순천향대학교 부설 산업기술연구소 2021 순천향 산업기술연구소논문집 Vol.27 No.2

Goldman Sachs recently laid off 598 top talents, while Google and NASA established a singularity university. As we enter the era of the 4th Industrial Revolution, each company and university is nurturing talent for the age of artificial intelligence(AI). As factories and various facilities are automated and AI and the Internet of Things (IoT) enter homes and businesses, interest in automation is gradually increasing, and AI robots are replacing human jobs. Therefore, a study was conducted on the implementation of a sorting robot for smart factory automation. The hardware of the robot was realized using TETRIX, and it was configured to recognize the color of blocks and classify the object using NXT color sensors. The color sensor is used to determine the type of a block and a linetracer is to help figure out location, and the block was placed in the right place. The control program was implemented using LabVIEW, and the NXT was implemented to control the robot through the signal obtained from the color sensor.

Predation of the Japanese keelback (Hebius vibakari Boie, 1826) by the Slender racer (Orientocoluber spinalis Peters, 1866)

Park, Il-Kook,Park, Jaejin,Park, Jiho,Min, Seong-Hun,Grajal-Puche, Alejandro,Park, Daesik The Ecological Society of Korea 2021 Journal of Ecology and Environment Vol.45 No.1

Background: The Slender racer (Orientocoluber spinalis Peters, 1866) has recently been reclassified to the new genus Orientocoluber from Hierophis. Ecological knowledge of this species is limited due to its highly mobile behavior. On 17 July 2020, we captured a female O. spinalis on Oeyeon Island, Boryeong-si, Republic of Korea, and collected its feces for a diet analysis. We observed snake scales from the collected feces and subsequently determined the prey species through morphological and molecular methods. Results: We initially hypothesized that the extracted fecal sample scales belonged to H. vibakari, due to their thin keel and rhombus shape. We also amplified H. vibakari DNA from the extracted fecal sample using Illumina sequencing methods. Our morphological and molecular results suggest that O. spinalis predates H. vibakari on Oeyeon Island. Conclusion: This is the first report of O. spinalis predating another snake species, ophiophagy, and implies that H. vibakari may be a crucial prey item for O. spinalis on Oeyeon Island.

A Study on the Future and Development Plan of Highway According to the Fourth Industrial Revolution

Jiho, Park,Yongwon, Kim,Hwanpil, Lee 한국도로학회 2018 한국도로학회 학술대회 발표논문 초록집 Vol.2018 No.05

The purpose of this project is to seek strategic response for the Korea Expressway Corporation(hereinafter referred to as Public corporation) about the change of the fourth industrial revolution. For this purpose, the project scope has 3 phase. 1. Characteristic of the 4thindustrial revolution and the trend of major change. 2. Prospect of Future Expressway and changes related industry. 3. Publiccorporation’s Short-term strategy and detailed challenges. Also, The Project analyzes the KDF and patterns, which directly/indirectly affect the Public Corporation with change of 4th industrial revolution. As a result, Making a Mid-term and Short-term strategy for respond to future change with Structuring Causal Relationships and Deriving Future Scenarios. Moreover, we focuses on a shift in the number of key changes in the 4th industrial revolution and the first consideration to derive a significant change in the direction of change in the 4th century, focusing on trends that will not change the trend in 10 years, rather than 10 years later. First, The 4th industry revolution is not just point of view that integration of technology such as IOT,AI but Motivation that Creating the innovation in the whole society with huge change of social system. So executing Macroscopic analysis for formation of sympathy. Second, creates core changes drivers individual, businesses, and national level drivers in future trends. And the strategic direction that road's role and function at future society are reflected in the public corporation's strategic tasks. Thrid, For prospect of future expressway, reviewing public corporation's existing research data. As a result, Preventing duplicate researches and enhance research efficiency. Fourth, an analysis of the present situation Through expert review of the 4th industry revolution and future development direction by convergence based on a current road map. Considering the change in the social and social environment, prospect future outlook with Deduction of change drivers that will not changed after 10years. Fifth, focus on human desires and values, technological innovation, solving problems, converging technology culture, solving social issues, and responding to changes in social issues. In order to realize this, it is possible to communicate in storytelling so that ordinary people can easily understand the changes in the area. Based on the scenario, we prepared for the future of the Korea Expressway Corporation by setting up a total of 15 detailed tasks based on the scenario and the fact that 15 different aspects of the project are based on the scenario.

Two-photon interferences of nondegenerate photon pairs from Doppler-broadened atomic ensemble

Park, Jiho,Kim, Heonoh,Moon, Han Seb The Optical Society 2017 Optics express Vol.25 No.25

Kinematic Analysis of Back Somersault Pike According to Skill Level in Platform Diving

Park, Jiho,Yoon, Sukhoon Korean Society of Sport Biomechanics 2017 한국운동역학회지 Vol.27 No.3

Objective: The purpose of this study was to investigate kinematic differences in back pike somersault in platform diving according to skill level and to apply the findings to improve performance. Method: Korean divers participating in this study were divided into a skilled group (age: $21.6{\pm}4.16y$, height: $1.68{\pm}0.03m$, weight: $62.0{\pm}3.94kg$, career: $12.6{\pm}5.13y$) and a less-skilled group (age: $20.6{\pm}2.7y$, height: $1.72{\pm}0.05m$, weight: $64.8{\pm}6.76kg$, career: $12.2{\pm}2.49y$) and an independent t-test was performed to analyze differences between groups at the moment of takeoff. Results: The two groups showed significant differences in displacement and velocity of center of mass (COM), takeoff angle, hip joint angle, knee joint angular velocity, and hip joint angular velocity at the takeoff (p<.05), and significant differences in displacement of COM, hip joint, and ankle joint during flight (p<.05). Conclusion: For a successful back pike, the COM should rise quickly in the vertical direction and the hip joint angle and angular velocity should increase. To improve performance, the back pike turn should be practiced on the ground before an attempt on a 10-m platform, to stretch the ankle and knee joints and enable quick flexion of the hip joint when turning in flight.

Experimental Investigation of Superconducting Linear Compressor (SCLC) for Pulse Tube Refrigerator (PTR)

Jiho Park,Inmyong Park,Jeongmin Cha,Sangkwon Jeong Institute of Electrical and Electronics Engineers 2017 IEEE transactions on applied superconductivity Vol.27 No.4

<P>This research paper focuses on the development of the Stirling-type pulse tube refrigerator (PTR) system. The system includes an innovative cold compression concept by introducing a superconducting linear compressor (SCLC). As one of the key goals of this research, the working gas (helium) is to be compressed directly at cryogenic temperature. The mechanical work (pressure-volume (PV) work) can be directly transmitted to the PTR system without experiencing precooling process. The unique feature of this paper is to utilize a high-temperature superconductor (HTS) coil instead of using metallic conductor coil for a linear motor. By implementing a HTS linear motor to the cold compressor, the ohmic loss can be inherently eliminated, so that the higher motor efficiency can be expected. In this research paper, the experimental validation as a proof of concept is carried out. The HTS linear motor operates at 50 Hz without creating overheat problem. The SCLC stably generates the PV work at the temperature of liquid nitrogen and it is subsequently transmitted to the compression volume of the PTR. The whole PTR system, therefore, can readily operate between 80 and 20 K with the cooling capacity of 0.26 W.</P>

유소년 스포츠 선수들의 점프착지 후 수직점프 동작 시 착지 유형에 따른 하지관절의 운동역학적 분석

( Jiho Park ),( Joo Nyeon Kim ),( Sukhoon Yoon ) 한국운동역학회 2023 한국운동역학회지 Vol.33 No.3

Objective: The purpose of this study was to find out kinematic and kinetic differences the lower extremity joint according to the landing type during vertical jump movement after jump landing, and to present an efficient landing method to reduce the incidence of injury in youth players. Method: Total of 24 Youth players under Korean Sport and Olympic Committee, who used either heel contact landing (HCG) or toe contact landing (TCG) participated in this study (HCG (12): CG height: 168.7 ± 9.7 cm, weight: 60.9 ± 11.6 kg, age: 14.1 ± 0.9 yrs., career: 4.3 ± 2.9 yrs., TCG height: 174.8 ± 4.9 cm, weight: 66.9 ± 9.9 kg, age 13.9 ± 0.8 yrs., career: 4.7 ± 2.0 yrs.). Participants were asked to perform jump landing consecutively followed by vertical jump. A 3-dimensional motion analysis with 19 infrared cameras and 2 force plates was performed in this study. To find out the significance between two landing styles independent t-test was performed and significance level was set at .05. Results: HCG showed a significantly higher dorsi flexion, extension and flexion angle at ankle, knee and hip joints, respectively compared with those of TCG (p<.05). Also, HCG revealed reduced RoM at ankle joint while it showed increased RoM at knee joint compared to TCG (p<.05). In addition, HGC showed greater peak force, a loading rate, and impulse than those of TCG (p<.05). Finally, greater planta flexion moment was revealed in TCG compared to HCG at ankle joint. For the knee joint HCG showed extension and flexion moment in E1 and E2, respectively, while TCG showed opposite results. Conclusion: Compared to toe contact landing, the heel contact landing is not expected to have an advantage in terms of absorbing and dispersing the impact of contact with the ground to the joint. If these movements continuously used, performance may deteriorate, including injuries, so it is believed that education on safe landing methods is needed for young athletes whose musculoskeletal growth is not fully mature.

Development of a data-driven process to cost-efficiently estimate hydraulic property of aquifer

Jiho Jeong,Jina Jeong,Eungyu Park,Gyeong Tae Park 대한지질학회 2019 대한지질학회 학술대회 Vol.2019 No.10

Facile and rapid preparation of rhombohedral In₂O₃ nanoparticles and their application as a α-pinene detector

Jiho Park,Byeong-Hun Yu,Ji-Wook Yoon 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.4

CONTINUOUS THERMODYNAMICS OF PHASE EQUILIBRIA USING THE BETA DISTRIBUTION FUNCTION AND AN EQUATION OF STATE

Park, Jiho,Kim, Hwa Yong 한국화학공학회 1993 Korean Journal of Chemical Engineering Vol.10 No.2

Phase equilibrium calculation involving mixtures of very many components requires significant amounts of computation time. In this paper we considered the description of such mixtures as a collection of discrete components and a continuum distribution of species represented by the beta distribution function. Calculations are performed using the method of continuous thermodynamics and the Soave-Redlich-Kwong equation of state. Comparisons were made with the pseudocomponent method and gamma distribution function. The results showed that continuous thermodynamics with beta distribution function leads to better prediction of phase equilibria and shorter computing time compared to pseudocomponents. And more reasonable results were obtained by this method because of the flexibility of beta distribution function.