http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Design and Performance Analysis of a Mechanical Baler Cutting Machine
( Deoghyun Lee ),( Junhyeon Lee ),( Frank Gyan Okyere ),( Gyeongmun Choi ),( Hyeontae Kim ) 한국농업기계학회 2019 한국농업기계학회 학술발표논문집 Vol.24 No.1
The use of agro waste for biomass production is on the rise in recent times. To achieve a high surface to volume ratio for efficient biomass production, the agro waste material needs to be chopped or cut into pieces. However machines for such purposes are not readily available. The aim of this research was to design and analyze the performance of a baler cutting machine. A baler cutting machine is used to cut and resize plants for biomass production. A3D Mechanical design software (CATIA) was used for the designing of the machine and was subsequently manufactured at the Woosong Engineering Ltd (Jinju, S. Korea). The machine is made of three (3) main parts; the cutting system, the power source and the control system. The cutting system comprises of a 0.05m shaft with six cutting blades spaced at 0.2m apart. The cutting blades is a 0.5m thick plate bent at angle of 30o to the horizontal with a v- shape end sharpened. The cutting blade is of length 0.3m and width 0.1m. The power source is a 3- phase electric motor which connects to the cutting system through a pulley with a belt. The control system is an automated control board that regulates the speed (ground and bed speed). To analyze the efficiency of the machine, corn stalks of various sizes were used. Three ground speeds were used. The theoretical and practical efficiency of the machine was 97% and 91.2% respectively. The machine gave an impressive output with the cutting system giving a good cutting orientation when the moisture content of the corn stalks were high (>60%). This was achieved when with a rotating speed of 1770 rpm.
Jongsu Lee,Junhyeon Byeon,Chang Woo Lee 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.7 No.3
In this study, we fabricated a thickness-controllable double-layer electrolyte to prevent peel-off among the anode, and cathode functional layers, and electrolyte layer generated during the sintering process in the fabrication of solid oxide fuel cell using the roll-to-roll additive manufacturing process. The peel-off could be generated by the diff erence of coeffi cient of thermal expansions (CTEs) of the component layers of SOFC. Gadolinium-doped ceria (GDC) is a ceramic electrolyte of which CTE is closer to the mixture of lanthanum strontium cobalt ferrite and gadolinium-doped ceria (LSCF-GDC), the cathode functional layer in this study, than yttrium-Stabilized zirconia (YSZ), the electrolyte layer. By embedding a thin GDC layer between LSCF-GDC and YSZ, the peel-off due to the thermal deformation can be prevented. Using the visco-capillary model, mass conservation law, and wettability of coated solution, we have determined the range of coating conditions for forming a stable coating bead. We coated a high-quality double-layer electrolyte of which component layer thicknesses can be controllable using a pilot-scale roll-to-roll slot-die coating process. The study can be useful to determine the coating conditions in the roll-to-roll process, i.e., coating gap, web speed, and fl ow rate, for thickness-controllable high-quality multi-layer coating without time and cost consumptive trial-and-error procedure.
( Ju Hyun Lee ),( Junhyeon Cho ),( Sanghyuk Im ),( Beom Hee Kim ),( Chung Seop Lee ),( Jung Wha Chung ),( Yung Jung Kim ),( Eun Sun Jang ),( Jin-wook Kim ),( Hong Bin Kim ),( Sook-hyang Jeong ) 대한간학회 2016 춘·추계 학술대회 (KASL) Vol.2016 No.1
Aims: Health care workers (HCW) are at high risk of sharp injury including needle stick injuries, percutaneous and mucocutaneous injuries. Hepatitis B virus (HBV), hepatitis C virus (HCV), and human immunodeficiency virus (HIV) are causes of sharp injury-related infection. The aims of this study were to elucidate the incidence density and epidemiological characteristics of sharp injury among HCW, and to investigate the transmission rate of HBV, HCV and HIV in a Korean university hospital. Methods: This retrospective cohort study analyzed the data from the HCW self-reporting system for sharp injury, which is integrated in electronic healthcare recording system and managed by Occupational Safety and Health Office from January 2011 to December 2015. The incidence density per 100 persons (full-time equivalent employees)-year of sharp injury was calculated. Descriptive analysis was performed on the characteristics of sharp injury and transmission rate of HBV, HCV, and HIV. Results: A total of 1,076 occupational blood exposures were reported during 5 year. The total HCW number was 10,452, and the average yearly bed number was 1,072. Overall incidence density of sharp injury was 5.6 cases per 100 person-year, and 20.3 per 100 bed-year. Among the occupation type, housekeeping people in janitorial service company working in hospital wards showed the highest rate of sharp injury (14.8%) followed by doctors (8.5%) and nurses (6.2%). The most common place of sharp injury was wards, emergency room, and operating room (38.1%, 13.3% and 12.2%, respectively). The percutaneous injury accounted for 86.7% and mucocutaneous injury for 13.2%. During the 5 years, incidence rate tends to gradually decrease, and bed number per HCW was significantly associated with incidence density of sharp injury during the study period. Among the source patients, HBV, HCV, and HIV was positive in 133/681 (19%), 126/680 (18.5%) and 25/657 patients (3.8%), respectively. However, only one HCW was infected by HCV, showing HCV transmission rate of 0.8%. Neither HBV nor HIV infection occurred. Conclusions: The current incidence rate of sharp injury in a Korean university hospital HCW by highly encouraged easy reporting system was 5.6 cases per 100 person-year, and 20.3 per 100 bed-year, showing the highest incidence in housekeeping people in janitorial service company working in hospital wards. The transmission rate of HCV was less than 1%, while there was no transmitted case of HBV or HIV. Preventive measures to reduce sharp injury for HCW should be continued.
Water Drinking System Design in Pig Barns-Pig’s Neck Angle Based Approach
( Elanchezhian Arulmozhi ),( Jayanta Kumar Basak ),( Jihoon Park ),( Fawad Khan ),( Frank Gyan Okyere ),( Yongjin Lee ),( Junhyeon Lee ),( Deoghyun Lee ),( Hyeon Tae Kim ) 한국농업기계학회 2019 한국농업기계학회 학술발표논문집 Vol.24 No.1
Drinking water is essential for the steady growth of pigs. Comparatively nipple drinker prompts more water intake while more water wastage as opposed to conventional drinking bowls. By fixing the nipple drinkers in right position can ready to diminish over half of water loss. The objective of this examination is to locate the right spot to fixing the nipple drinkers on the basis of neck movement angle of pigs. Three pig barns with group-housed environment which consists of six finishing pigs in every livestock test bed were used as model pig barns. The height to place the drinker calculated by the angle of pig. As indicated by the angle estimation, three treatments were directed with the name of T1 with 30.27<sup>0</sup> angle, T2 with 86<sup>0</sup> angle and T3 with 120.27<sup>0</sup> angle where the angle created by pig. To understand the diurnal drinking pattern of pigs to provide adequate water in peak time, thus a CMOS camera placed on the top roof of a pig barn to monitor number of visits and duration of drinking, however camera additionally used to affirm each pig’s drinking routinely. All the treatment significantly not influence the water intake of pigs (P>0.60) but it emphatically influence the water wastage (P<0.05). The outcome shows that T3 has low dimension water wastage (32%) with higher average daily gain compared to T1 and T2. Additionally, the number of visits near to the drinker and time taken to drink water is affected by the treatments and there is correlation between the number of visits near to the drinker and water wastage (R<sup>2</sup>=0.785). T3 has low number of visits near to the drinker, consequently this treatment may create opportunity for all pigs to drink more in group- housed.
Convenient Colorimetric Bead Technology for Rapid Antimicrobial Susceptibility Testing
Junhyeon Jeon(전준현),Seoyoon Song(송서윤),Huisoo Jang(장희수),Deborah Lee(이드보라),Woojin Jeong(정우진),Eun Hwan Bae(배은환),Hoon Kim(김훈),Yong Sung Choi(최용성),Minhye Shin(신민혜),Tae-Joon Jeon(전태준),Sun Min Kim(김선민) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11