• Title/Summary/Keyword: Jang Jun-Ha

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An Implementation of a Virtual RFID Emulator System using a Commercial CAD tool (상용 CAD 툴을 이용한 RFID 에뮬레이터 시스템 구현)

  • Lim, Hyung-Mu;Bae, Sung-Woo;Jung, Myung-Sub;Jang, Byung-Jun;Kim, Jun-O;Park, Jun-Seok;Seong, Yeong-Rak;Oh, Ha-Ryoung
    • Proceedings of the IEEK Conference
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    • 2005.11a
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    • pp.1049-1054
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    • 2005
  • With the growth of RFID market in logistics industry, such as post office, airline, shipping etc., development of RFID readers and tags becomes crucial. Especially, $860{\sim}960MHz$ RFID is worth noticing because of its long identification range and low production cost. Therefore, performance tests and verification of reader and/or tag under development are very important. In this paper, a RFID emulator system is designed and implemented using a commercial CAD tool, a signal generator and a data acquisition device. With the RFID emulator system, many parameters such as spectrum masks, transmit power levels, data waveform and other RF characteristics can be analyzed. Furthermore it can be applied to the verification of real RFID Readers or Tags.

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A Study on the RF Shower System to Extend Interrogating Range for the Low Power RFID Reader System (저출력 RFID 시스템에서 인식거리 확대를 위한 전력 공급용 RF Shower 시스템)

  • Jung, Jin-Wook;Bae, Jae-Hyun;Oh, Ha-Ryoung;Seong, Yeong-Rak;Song, Ho-Jun;Jang, Byeong-Jun;Choi, Kyung;Lee, Jung-Suk;Lee, Hong-Bae;Lee, Hak-Yong;Kim, Jong-Min;Shin, Jae-Cheol;Park, Jun-Seok
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.55 no.12
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    • pp.526-533
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    • 2006
  • In this paper, we presented the synchronization module between RF shower system and RFID Reader to extend interrogating range on Mobile RFID system, Costas Loop and FPLL(Frequency/phase Lock Loop) were used. We achieved compromised range of 3MHz locking frequency, 1ms locking time and figured out remarkable Hopping frequency of the Reader. The prototype of the new designed RFID system has been tested with ISO18000-6 type-B Tag. The read range between designed RFID Reader and Tag has been measured, it increased triple times by adjusting the Shower system output level.

Eco-Friendly Control of Water Foxtail (Alopecurus aequalis) on Cultivation Fields of Forage Barley Sowed before Rice Harvest (벼 수확전 청보리 파종 재배시 친환경적 뚝새풀 관리)

  • Im, Il-Bin;Im, Bo-Hyeok;Park, Jea-Hyeon;Jang, Jun-Hyeong;Oh, Young-Jin;Jang, Un-Woo
    • Weed & Turfgrass Science
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    • v.3 no.1
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    • pp.13-18
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    • 2014
  • This study was conducted to develop an eco-friendly control method for water foxtail in the field sowing barley seeds before rice harvesting. When sea water was applied pre-emergent, 1 and 2 leaves, little injury was observed on barley. Percent of water foxtail control with sea water (100%) was more than 50% at 1 leaf application timing. When sodium chloride was applied 400, 800 and $1,600kg\;ha^{-1}$, little injury was observed on barley. Percent of water foxtail control with sodium chloride was 36-44% at 30 days after sowing. When ferrous sulfate was applied at 400, 800 and $1,600kg\;ha^{-1}$, emergent injury was observed 35-50% on barley. Percent of water foxtail control with ferrous sulfate was 48-79% at 30 days after sowing. When barley was sowed at 200, 300 and $400kg\;ha^{-1}$, seeding rate standing plants have many of the more crops, water foxtail occurrence was low. And, Forage yield of 300 kg ha-1 seeding in the highest. Based on the results, it is possible to control water foxtail in the field sowing barley seeds before rice harvesting more than 50%.

Fabrication of 6 double pancakes Bi-2223 HTS magnet (6 더블팬케이크 Bi-2223 고온초전도 마그네트 제작)

  • Ha, Hong-Soo;Jang, Hyun-Man;Lee, Nam-Jin;Oh, Sang-Soo;Ha, Dong-Woo;Ryu, Kang-Sik;Lee, Hai-Gun;Lee, Jun-Suck
    • 한국초전도학회:학술대회논문집
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    • v.9
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    • pp.373-377
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    • 1999
  • HTS magnet operated at 20${\sim}$40 K was fabricated using three pieces of 100 m Bi-2223 high temperature superconductors fabricated by powder-in-tube process. It was composed of 6 double pancakes with 75 ID. and 113 OD. connected by lab splice. Coil I$_c$ of each DP.(double pancake) obtained for a 140 turn, fabricated using react and wind procedure was 6${\sim}$8 A at 77 K, self field. The maximum field was measured 0.06 T at lop = 5 A, 77 K. The joint resistance due to lap splice of HTS tapes affect badly to operate HTS magnet with persistent current mode, total effective magnet resistance included lap splice was 55 ${\mu}$ ${\omega}$ at 77 K.

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Performance Evaluation of HFO-1234yf as a substitute for R-134a in a Household Freezer/Refrigerator (HFO-1234yf를 적용한 가정용 냉동/냉장고의 성능평가)

  • Lee, Jang-Seok;Han, Jun-Soo;Lee, Myung-Ryul;Jeon, Si-Moon
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.35 no.7
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    • pp.743-748
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    • 2011
  • The performance of HFO-1234yf as a substitute for R-134a was evaluated in a household freezer/refrigerator. A series of tests such as 'refrigerant charging test, pull-down test, cooling speed test, and energy consumption test were carried out under the AHAM (Association of Home Appliance Manufacturers) standard. The results of a drop-in test were compared with those of a test conducted using R-134a. A test under a severe ambient air condition ($43^{\circ}C$) was also conducted. The result shows that the refrigeration cycle performance of HFO-1234yf is as good as that of R-134a ; however, the diameter of capillary tube should be increased in order to improve its performance in the cooling speed test.

Bibliographic Study on the Tongue-Acupunccture Therapy (설침요법(舌鍼療法)에 대한 문헌적(文獻的) 고찰(考察))

  • Lee, Jun Ho;Kim, Kee Hyun
    • Journal of Haehwa Medicine
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    • v.1 no.1
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    • pp.255-278
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    • 1992
  • Based on recent 27 document, reported in Huang Ti Nei Ching, the following results concering the tongue and Tongue-acupuncture were obtained: 1. It was observed that the tongue has direct or indirect connection with the Heart meridian, the Liver meridian, the Spleen meridian, the Kidney meridian, the Triple energizer meridian and the Stomach meridian. 2. The Tongue-acupunccture, needlingon tongue, is one of new acupunctures treating general disorder and 31 acu-points have been found; 17 points on the upper part and 14 points on the lower part of the tongue. 3. The Tongue-acupuncture is employed by dividing the tongue into threeregions; Sangcho area(下焦穴), Jungcho area(中焦穴) and Hacho area(下焦穴). Each region cures its own corresponding symptoms. 4. The upper part of the tongue is divided into 4 regions by the sidelines along with Chuy Cheon(聚泉), So Jang Hyul(小腸穴) and Dae Jang Hyul(大腸穴). Sangcho area(上焦穴) includes Sim Hyul(心穴), Pye Hyul(肺穴), Sang Gi Hyul(上肢穴) and Jungcho area(中焦穴) includes Ui Hyul(胃穴), Bi Hyul(脾穴), Dam Hyul(膽穴) and Hacho area(下焦穴) includes Gan Hyul(肝穴), Bang Kwang Hyul(膀胱), Sin Hyul(腎穴) and the inner region includes Yim Hyul(陰穴), Ha Gi Hyul(下肢穴), on The lower part of the tongue, there are aec Hyul(額穴), Mok Hyul(目穴), Bi Hyul(鼻穴), I Hyul(耳穴), In Hu Hyul(咽喉穴) in contrast with the face above the center of the tongue as well as Gi Maek Hyul(支脈穴), Hae Chun Hyul(海泉), Gyum Gin Ok Aek(金津玉液), Seol Ha Hyul(舌下穴), Seol Gu(舌柱), Joa Chun Hyul(佐泉穴), Sin Gyun Hyul(神根穴), Jung Gu(中矩), Aek Bang Hyul(液旁穴). 5. The Tongue-acupuncture can be applied to the disease internal medicine, surgery, ophthalmology, otorhinolaryngology, gynecology, musculoskeletal system, symptomatology.

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Optimized Expression, Purification, and Rapid Detection of Recombinant Influenza Nucleoproteins Expressed in Sf9 Insect Cells

  • Yoon, Sung-Jin;Park, Young-Jun;Kim, Hyun Ju;Jang, Jinwoo;Lee, Sang Jun;Koo, Sunwoo;Lee, Moo-Seung
    • Journal of Microbiology and Biotechnology
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    • v.28 no.10
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    • pp.1683-1690
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    • 2018
  • Accurate and rapid diagnosis of influenza infection is essential to enable early antiviral treatment and reduce the mortality associated with seasonal and epidemic infections. Immunochromatography is one of the most common methods used for the diagnosis of seasonal human influenza; however, it is less effective in diagnosing pandemic influenza virus. Currently, rapid diagnostic kits for pandemic influenza virus rely on the detection of nucleoprotein (NP) or hemagglutinin (HA). NP detection shows higher specificity and is more sensitive than HA detection. In this study, we time-dependently screened expression conditions, and herein report optimal conditions for the expression of recombinant nucleoprotein (rNP), which was 48 h after infection. In addition, we report the use of the expressed rNP in a rapid influenza diagnostic test (SGT i-flex Influenza A&B Test). We constructed expression vectors that synthesized rNP (antigen) of influenza A and B in insect cells (Sf9 cells), employed the purified rNP to the immunoassay test kit, and clearly distinguished NPs of influenza A and influenza B using this rapid influenza diagnostic kit. This approach may improve the development of rapid test kits for influenza using NP.

The Flora of Experiment Forest of Kookmin University (국민대학교 학술림의 식물상)

  • Choi, Im Jun;Lee, Jong-Won;Lim, Won Taek;Jang, Jun Ho;Kang, Shin-Ho
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2019.04a
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    • pp.45-45
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    • 2019
  • 학술림은 학생, 교수, 산림 연구기관의 실험 실습 등의 연구 기능을 하는 숲이며, 경제적, 사회적 및 환경적으로 큰 의미가 있어, 학술연구 및 교육에 있어서 중요한 필수 자산이다. 국내에 분포하는 학술림의 전체면적은 약 34,941ha로 국내 전체 면적 6,335,000ha의 0.55%를 차지하고 있다. 국내 학술림을 행정적으로 남부, 중부 및 북부 세권역으로 나눠볼 수 있는데 중부권역에 속해있는 한 곳인 국민대학교 학술림의 자생식물을 조사하였다. 국민대학교 학술림이 위치한 경상북도 안동시 길안면 배방리 일대는 청송 유네스코 세계지질공원 및 주왕산국립공원과 인접함에도 불구하고 연구가 부족한 실정이다. 본 연구에서 확인된 관속식물은 97과 292속 518종 등 총 518분류군으로 조사되었으며, 산림청지정 희귀식물로는 댕댕이나무, 산분꽃나무, 시호, 솜양지꽃, 산마늘 등 10분류군이 확인되었고, 특산식물은 청괴불나무, 참배암차즈기, 고려엉겅퀴, 분취 등 9분류군이 확인되었다. 식물구계학적 특정식물은 I등급은 고려엉겅퀴, 백선, 뻐꾹채, 초롱꽃, 투구꽃 등 26분류군, II등급은 곰취, 구와취, 노랑제비꽃, 채고추나물, 호오리새 등 11분류군, III등급은 복자기, 시닥나무, 참조팝나무, 눈개승마, 다북떡쑥 등 24분류군, Ⅳ등급은 개아마, 뚝사초, 산마늘, 왜방풍, 참배암차즈기 등 8분류군, V등급은 산분꽃나무 1분류군으로 확인되었다.

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The Introduction of Adverse Drug Reaction (ADR) Monitoring System

  • Jung, Sun-Hoi;Park, Kyoung-Ho;Soh, Ok-Kyoung;Lee, Byung-Gu;Park, Kaung-Jun;Bae, Guen-Shub;Jang, In-Jin;Kim, Youn-Gun;Kim, Ju-Sung;Chae, In-Ho;Kim, Yeun-Su;Ha, Jong-Won;Song, Yong-Sung;Choung, Jon-Ho;Kyun, Jin-Soo;Kim, Sang-Yeun;Go, Zae-Sung;Park, Jun-Dong;Song, Kyeng-Ja;Park, Byung-Joo
    • Proceedings of the PSK Conference
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    • 2001.10a
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    • pp.323-323
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    • 2001
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Assessment of Fatigue Crack Propagation Considering the Redistribution of Residual Stress due to Overload

  • Jang, Chang-Doo;Leem, Hyo-Kwan;Choi, Yeoung-Dal;Bang, Jun-Kee;So, Ha-Young
    • Journal of Ship and Ocean Technology
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    • v.11 no.2
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    • pp.26-33
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    • 2007
  • For the assessment of the retardation of fatigue crack propagation behavior due to overload, new FE analysis algorithms considering compressive residual stress redistribution near crack tip was proposed in this paper. The size of plastic zone near crack tip was obtained by elasto-plastic analysis and it was compared with Irwin's equation. The amount of residual stress redistribution was assessed by subsequent elasto-plastic analysis, and the difference of residual stress distributions between constant amplitude load and overload was obtained. In the analysis of fatigue crack propagation, the applied SIF range was evaluated by ASTM E647, and the effect of residual stresses on crack propagation was considered using the effective SIF concept. The test results of crack propagations were compared with the predicted data obtained by the analysis.