• Title/Summary/Keyword: An Chung Hwan

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Spontaneous Healing of Acromial Stress Fracture Caused by Clavicle Hook Plate in Acromioclavicular Joint Dislocation - A Case Report

  • Kim, Gang-Un;Kim, Seong-Hwan;Lee, Jae-Sung;Kim, Jae Yoon
    • Clinics in Shoulder and Elbow
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    • v.17 no.1
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    • pp.36-39
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    • 2014
  • Clavicular hook plate is known to be an effective treatment on acromioclavicular (AC) joint injury, but there have been some reports of complications, like osteolysis and bony erosion of the undersurface of acromion. Fifty-five year old male underwent open reduction and hook plate insertion on Rockwood type 5 acromioclavicular joint dislocation. He complained of protrusion of posterior acromion at 1 month after the surgery, and acromial fracture was noted in simple radiographs. The hook plate was removed and any other treatment for osteosynthesis was refused by the patient. At the 18 months after the surgery, the patient had no pain and a full range of motion with no tenderness around the shoulder joint. After two years, plain radiographs revealed complete bony union of the acromion fracture.

Combination of Korean Medicine Therapy to Treat Posttraumatic Knee Stiffness: A Case Report (외상 후 슬관절 강직에 대한 복합 한의치료의 경과: 증례보고)

  • Lee, Geon-Yeong;Seol, Jae-Uk;Jo, Hee-Geun;Kwon, Min-Gu;Jeong, Sin-Yeong;Kim, Jong-Hwan;Park, Eo-Jin
    • Journal of Korean Medicine Rehabilitation
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    • v.27 no.2
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    • pp.109-115
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    • 2017
  • The purpose of this study is to illustrate the potential for clinical improvement in treating a patient with a case of Posttraumatic Knee Stiffness with a combination of Korean medicine therapy. We treated the patient with acupuncture, electroacupuncture, CHUNA manual therapy and Interferential Current Therapy from $5^{th}$ December 2016 to $13^{th}$ January 2017 (total 29 times) by evaluating knee function with VAS score. After six weeks of treatment, this patient achieved effective outcome following the technique, showing that clinical symptom as able to walked and pain was relieved, VAS changed from 10 to 2 and the knee flexion ROM (active/passive) changed from 30/60 degrees to 120/140 degrees. This result shows that Korean Medicine therapy may be an effective option for Posttraumatic Knee Stiffness. Further clinical studies are needed to clarify the effect of Korean Medicine therapy on Posttraumatic Knee Stiffness.

Hed1 Promotes Meiotic Crossover Formation in Saccharomyces cerevisiae

  • Kong, Yoon-Ju;Joo, Jeong-Hwan;Kim, Keun Pil;Hong, Soogil
    • Journal of Microbiology and Biotechnology
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    • v.27 no.2
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    • pp.405-411
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    • 2017
  • Homologous recombination occurs between homologous chromosomes and is significantly involved in programmed double-strand break (DSB) repair. Activation of two recombinases, Rad51 and Dmc1, is essential for an interhomolog bias during meiosis. Rad51 participates in both mitotic and meiotic recombination, and its strand exchange activity is regulated by an inhibitory factor during meiosis. Thus, activities of Rad51 and Dmc1 are coordinated to promote homolog bias. It has been reported that Hed1, a meiosis-specific protein in budding yeast, regulates Rad51-dependent recombination activity. Here, we investigated the role of Hed1 in meiotic recombination by ectopic expression of the protein after pre-meiotic replication in Saccharomyces cerevisiae. DNA physical analysis revealed that the overexpression of Hed1 delays the DSB-to-joint molecule (JM) transition and promotes interhomolog JM formation. The study indicates a possible role of Hed1 in controlling the strand exchange activity of Rad51 and, eventually, meiotic crossover formation.

Electric Field Energy Harvesting Powered Wireless Sensors for Smart Grid

  • Chang, Keun-Su;Kang, Sung-Muk;Park, Kyung-Jin;Shin, Seung-Hwan;Kim, Hyeong-Seok;Kim, Ho-Seong
    • Journal of Electrical Engineering and Technology
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    • v.7 no.1
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    • pp.75-80
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    • 2012
  • In this paper, a new energy harvesting technology using stray electric field of an electric power line is presented. It is found that energy can be harvested and stored in the storage capacitor that is connected to a cylindrical aluminum foil wrapped around a commercial insulated 220 V power line. The average current flowing into 47 ${\mu}F$ storage capacitor is about 4.53 ${\mu}A$ with 60 cm long cylindrical aluminum foil, and it is possible to operate wireless sensor node to transmit RF data every 42 seconds. The harvested average power is about 47 ${\mu}W$ in this case. Since the energy can be harvested without removing insulating sheath, it is believed that the proposed harvesting technology can be applied to power the sensor nodes in wireless ubiquitous sensor network and smart grid system.

Pain and Weakness on Unilateral Upper Extremity Diagnosed as Brachial Plexopathy after Herpes Zoster Infection (대상포진후 상완신경총병증으로 진단된 편측 상지의 통증과 위약)

  • Cho, Junmo;Kang, Si Hyun;Seo, Kyung Mook;Kim, Don-Kyu;Kim, Du Hwan;Shin, Hyun Iee
    • Clinical Pain
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    • v.19 no.2
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    • pp.124-128
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    • 2020
  • Motor paralysis is a less common neurologic complication of herpes zoster. Until now, a few cases have been reported, and most of these cases showed brachial plexopathy involving one or two segments. We report a patient with pain and weakness on upper extremity diagnosed as brachial plexopathy after herpes zoster infection. An 88-year-old female patient complained not only tingling sense, pain, and swelling on right whole arm, but also weakness on this right upper extremity. On physical examination, weakness is seen in right shoulder abduction·shoulder flexion·elbow flexion·elbow extension· wrist extension (grade 4), finger flexion·finger abduction·finger extension·finger DIP flexion (grade 3). In electrodiagnostic study and magnetic resonance imaging study, she was diagnosed as the brachial plexopathy, whole branch involved. This is the only case of post-herpetic brachial plexopathy involving whole branch in domestic.

Nitric Oxide and Prostaglandin $E_2$ Synthesis Inhibitory Activities of Diarylheptanoids from the Barks of Alnus japonica Steudel

  • Kim Hyun-Jung;Yeom Seung-Hwan;Kim Min-Kee;Shim Jae-Geul;Paek In-Na;Lee Min-Won
    • Archives of Pharmacal Research
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    • v.28 no.2
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    • pp.177-179
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    • 2005
  • Nine known diarylheptanoids (1-9) isolated from the barks of Alnus japonica were evaluated for their inhibitory activities on nitric oxide (NO) and prostagrandin $E_2$ (COX-2) production in interferon-${\gamma}$ (INF-${\gamma}$) and lipopolysaccharide (LPS)-activated RAW 264.7 cells in vitro. The NO and COX-2 levels were moderately reduced by the addition of compounds (1-9). Among these compounds, compounds 6 and 8 inhibited NO production in a dose dependent manner with an $IC_{50}$ of 16.7 and $27.2\;{\mu}g/mL$, respectively (positive control, L-NMMA; $22.8\;{\mu}g/mL$), and compounds 6, 7, 8, and 9 reduced the COX-2 level in a dose dependent manner with an $IC_{50}$ of 20.7, 25.7, 25.0, and $27.3\;{\mu}g/mL$, respectively (positive control, indomethacin; $26.2\;{\mu}g/mL$). An analysis of the structural activity relationship among these diarylheptanoids suggests that the presence of a keto-enol group in the heptane moiety or a caffeoyl group in the aromatic ring were important for the efficacy on the inhibitory activities of NO and COX-2 production.

Optimum Design of the Wolsong Tritium Removal Facility

  • Ahn, Do-Hee;Lee, Han-Soo;Chung, Hong-Suk;Song, Myung-Jae;Son, Soon-Hwan
    • Nuclear Engineering and Technology
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    • v.28 no.4
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    • pp.415-422
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    • 1996
  • Tritium removal from tritiated heavy water in a PHWR is the most effective way in reducing workers' internal dose and radioactivity emissions from Wolsong NPP. The optimum design of the Wolsong TRF (Tritium Removal Facility) was carried out using an approximate short-cut method with an assumption that the TRF, designed to extract 8 MCi per year of elemental tritium from a heavy oater feedstream, uses Liquid Phase Catalytic Exchange (LPCE) front-end process and Cryogenic Distillation (CD) process.

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A Study on Intrusion Detection of ARP Poisoning Attack on Wireless LAN

  • Ham Young Hwan;Lee Sok Joon;Chung Byung Ho;Chung Kyoll;Chung Jin Wook
    • Proceedings of the IEEK Conference
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    • 2004.08c
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    • pp.540-543
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    • 2004
  • Address Resolution Protocol (ARP) cache poisoning is a MAC layer attack that can only be carried out when an attacker is connected to the same local network as the target machines. ARP is not a new problem, but wireless network introduces a new attack point and more vulnerable to the attack. The attack on wireless network cannot be detected by current detection tool installed on wired network. In order to detect the ARP poisoning attack, there must be a ARP poisoning detection tool for wireless LAN environment. This paper proposes linux-based ARP poisoning detection system equipped with wireless LAN card and Host AP device driver

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Implementation of Scalable Video Coding method for adaptive streaming (적응 스트리밍을 위한 스케일러블 비디오 코딩 기법에 관한 연구)

  • Park, Jong-Soon;Kim, Dong-Hwan;Chang, Tae-Gyu
    • Proceedings of the IEEK Conference
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    • 2005.11a
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    • pp.525-528
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    • 2005
  • Adaptive streaming algorithm for the realtime video decoder that can be dynamically adaptable to the network channel status or terminal environment is described and performance analyzed. An LMS filter is used to predict the bitrate and predicted bitrate is used to optimize based prediction filter is used to adapt and optimize the quality of the decoded pictures. The quality of the output pictures are about 48dB.

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