http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
영구자석을 이용한 새로운 Suction Mechanism
서성근(Sungkeun Seo),이승희(Seunghee Lee),박종현(Jonghyeon Park) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11
Suction transfer system with air suctioning is widely used and continuously developed in production automation. Air suctioning has some drawbacks in use. To generate vacuum in the suction cup with air suctioning, complex of mechanical component like as air compressor, air tube, air value is need, and it needs continuous air supply. And if the failure of the suction in a cup in the multi-suction cup system which is generally used occurs then the suctions of all of the cup will be fail. To overcome these drawbacks, new suction mechanism which uses permanent magnet for the movement of the suction cup is proposed. The proposed mechanism activates each suction cup separately, so the air leakage of a cup is not critical. The proposed suction system wasdesigned and fabricated in real world. With some experiments, the usability and performance of the suction mechanism was proved. The strong points of the proposed suction mechanism are simple structure, high energy efficiency, and discrete energy supply.
An Efficient Log Block Management Scheme Through Join between Log Blocks
Hakcheol Kim,Yonghun Park,Jonghyeon Yun,Dongmin Seo,seokil Song,Jaesoo Yoo 한국콘텐츠학회 2009 ICCC International Digital Design Invitation Exhib Vol.2009 No.12
In this paper, we propose a new log buffer management scheme considering the accessibility of the data. Our proposed method evaluates the worth of the merge of log blocks. It conducts the merge operations between infrequently updated data and the data blocks and postpones as much as possible the merge operations between frequently updated data and the data blocks. As a result, the proposed method prevents the unnecessary merge operations, reduces the number of the erase operations, and improves the utilization of the flash memory storage. It is shown through performance evaluation that the proposed method outperforms BAST and FAST.
Hip Fracture Surgery without Transfusion in Patients with Hemoglobin Less Than 10 g/dL
You-Sung Suh,Jae-Hwi Nho,Jonghyeon Seo,Byung-Woong Jang,Jong-Seok Park 대한정형외과학회 2021 Clinics in Orthopedic Surgery Vol.13 No.1
Background: Hip fracture surgery is associated with blood loss, which may lead to adverse patient outcomes. The hemoglobin level declines gradually in most hip fracture cases involving femoral neck fractures and intertrochanteric fractures. It decreases further after hip fracture surgery due to perioperative bleeding. We developed a protocol, which avoids transfusion in hip fracture surgery, and reviewed the hemodynamic outcomes of patients with hemoglobin less than 10 g/dL without transfusion. Methods: From 2014 to 2019, we retrospectively recruited 34 patients with hip fractures and a hemoglobin level less than 10 g/dL, who refused to undergo transfusion. There were 19 patients with femoral neck fractures and 15 patients with intertrochanteric fractures. Our patient blood management (PBM) protocol involving 4,000 U erythropoietin (3 times a week) and 100 mg iron supplement (every day) was applied to all included patients. Intraoperatively, a cell saver and tranexamic acid were used. Postoperatively, the protocol was maintained until the patients’ hemoglobin level reached 10 g/dL. We evaluated the feasibility of our protocol, perioperative complications, and hemodynamic changes. Results: Nineteen patients with femoral neck fractures underwent bipolar hemiarthroplasty and 15 patients with intertrochanteric fractures underwent internal fixation with a cephalomedullary nail. The mean hemoglobin level was 8.9 g/dL (range, 7.3–9.9 g/dL) preoperatively, 7.9 g/dL (range, 6.5–9.3 g/dL) immediately postoperatively, 7.7 g/dL (range, 4.3–9.5 g/dL) on postoperative day 1, 7.4 g/dL (range, 4.2–9.4 g/dL) on postoperative day 3, 8.1 g/dL (range, 4.4–9.7 g/dL) on postoperative day 5, 8.5 g/dL (range, 4.5–9.9 g/dL) on postoperative day 7, and 9.9 g/dL (range, 5.7–11.1 g/dL) on postoperative day 14. The average intraoperative bleeding was 206.2 ± 78.7 mL. There was no case associated with complications of anemia. Conclusions: Hip fracture surgery in patients with hemoglobin less than 10 g/dL was feasible without the need for transfusion using our PBM protocol in 34 patients. Using this protocol, the operation was conducted safely despite the anemic condition of patients with fractures whose hemoglobin was less than 10 g/dL.
Baek, Se-Woong,Park, Garam,Noh, Jonghyeon,Cho, Changsoon,Lee, Chun-Ho,Seo, Min-Kyo,Song, Hyunjoon,Lee, Jung-Yong American Chemical Society 2014 ACS NANO Vol.8 No.4
<P>In this report, we propose a metal–metal core–shell nanocube (NC) as an advanced plasmonic material for highly efficient organic solar cells (OSCs). We covered an Au core with a thin Ag shell as <I>a scattering enhancer</I> to build Au@Ag NCs, which showed stronger scattering efficiency than Au nanoparticles (AuNPs) throughout the visible range. Highly efficient plasmonic organic solar cells were fabricated by embedding Au@Ag NCs into an anodic buffer layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), and the power conversion efficiency was enhanced to 6.3% from 5.3% in poly[<I>N</I>-9-hepta-decanyl-2,7-carbazole-<I>alt</I>-5,5-(4,7-di-2-thienyl-2,1,3-benzothiadiazole)] (PCDTBT):[6,6]-phenyl C<SUB>71</SUB>-butyric acid methyl ester (PC<SUB>70</SUB>BM) based OSCs and 9.2% from 7.9% in polythieno[3,4-<I>b</I>]thiophene/benzodithiophene (PTB7):PC<SUB>70</SUB>BM based OSCs. The Au@Ag NC plasmonic PCDTBT:PC<SUB>70</SUB>BM-based organic solar cells showed 2.2-fold higher external quantum efficiency enhancement compared to AuNPs devices at a wavelength of 450–700 nm due to the amplified plasmonic scattering effect. Finally, we proved the strongly enhanced plasmonic scattering efficiency of Au@Ag NCs embedded in organic solar cells <I>via</I> theoretical calculations and detailed optical measurements.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2014/ancac3.2014.8.issue-4/nn500222q/production/images/medium/nn-2014-00222q_0005.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn500222q'>ACS Electronic Supporting Info</A></P>
Wearable Textile Battery Rechargeable by Solar Energy
Lee, Yong-Hee,Kim, Joo-Seong,Noh, Jonghyeon,Lee, Inhwa,Kim, Hyeong Jun,Choi, Sunghun,Seo, Jeongmin,Jeon, Seokwoo,Kim, Taek-Soo,Lee, Jung-Yong,Choi, Jang Wook American Chemical Society 2013 Nano letters Vol.13 No.11
<P>Wearable electronics represent a significant paradigm shift in consumer electronics since they eliminate the necessity for separate carriage of devices. In particular, integration of flexible electronic devices with clothes, glasses, watches, and skin will bring new opportunities beyond what can be imagined by current inflexible counterparts. Although considerable progresses have been seen for wearable electronics, lithium rechargeable batteries, the power sources of the devices, do not keep pace with such progresses due to tenuous mechanical stabilities, causing them to remain as the limiting elements in the entire technology. Herein, we revisit the key components of the battery (current collector, binder, and separator) and replace them with the materials that support robust mechanical endurance of the battery. The final full-cells in the forms of clothes and watchstraps exhibited comparable electrochemical performance to those of conventional metal foil-based cells even under severe folding–unfolding motions simulating actual wearing conditions. Furthermore, the wearable textile battery was integrated with flexible and lightweight solar cells on the battery pouch to enable convenient solar-charging capabilities.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/nalefd/2013/nalefd.2013.13.issue-11/nl403860k/production/images/medium/nl-2013-03860k_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nl403860k'>ACS Electronic Supporting Info</A></P>