• Title/Summary/Keyword: RHA

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MRI Protocol of Female Pelvis (여성골반 MRI 프로토콜)

  • Shin, Yu-Ri;Rha, Sung-Eun
    • Investigative Magnetic Resonance Imaging
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    • v.14 no.1
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    • pp.1-9
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    • 2010
  • Although ultrasonography is the most commonly used first-line imaging modality of the female pelvis because of diagnostic accuracy, low cost and safety, MRI is the best imaging modality of choice for the evaluation of the female pelvis. The indication of female pelvis MRI is diverse and includes the evaluation of M$\ddot{u}$llerian duct anomaly, differential diagnosis and characterization of uterine and ovarian tumors, and staging of malignant uterine and ovarian tumors. Understanding of MR protocols according to the specific gynecologic pathology allows accurate diagnosis and proper patient management.

A Study on Early Age Shrinkage of Concrete using Recycled Aggregate (재생골재를 사용한 콘크리트의 초기재령 수축에 관한 연구)

  • Koo, Bong-Kuen;Seo, Sang-Gu;Rha, Jae-Woong;Park, Jae-Seong
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.7 no.2
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    • pp.159-167
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    • 2003
  • Cracks in reinforced concrete structures reduce overall durability by allowing the penetration of water and aggressive agents, thereby accelerating the deterioration of the reinforcing steel. Highway pavement and bridge decks are especially susceptible to this type of deterioration since these structures exhibit high rates of shrinkage and are frequently exposed to aggressive environmental conditions. The objectives of this investigation included the development of experimental procedures for assessing shrinkage cracking potential of recycled aggregate concrete, the evaluation of mix composition on shrinkage cracking potential, and the development of theoretical models to simulate early-age cracking behavior. Specifically, the influences of shrinkage-reducing admixture(SRA) and recycled aggregate concrete were investigated. The shrinkage-reducing admixture substantially reduces free shrinkage and restrains shrinkage cracking while providing similar mechanical properties. A fracture mechanics modeling approach was developed to predict the behavior of a variety of restrained concrete specimens. This modeling approach was used to successfully explain experimental results from a variety of mixture compositions. The model was used to demonstrate the influence of material and structural properties on the potential for cracking.

Direct Regeneration of Transgenic Buckwheat from Hypocotyl Segment by Agrobacterium-mediated Transformation

  • Kim, Hyun-Soon;Kang, Hyeon-Jung;Lee, Young-Tae;Lee, Seung-Yeob;Ko, Jeong-Ae;Rha, Eui-Shik
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.46 no.5
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    • pp.375-379
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    • 2001
  • Transgenic plants from hypocotyl segments of buckwheat were produced with the Agrobacterium strain LBA4404 harboring the binary vector pBI121 containing chimeric genes of neomycin phosphotransferase II (npt II) and $\beta$-glucuronidase (gus). Two weeks after co-cultivation with Agrobacterium, most of the hypocotyl segments gradually became brown and died on the selection medium containing 100mg/$\ell$ of kanamycin. Plants regenerated from the hypocotyl explants grown on selection medium were GUS-positive in the leaf, stem and vascular tissues by histochemical assay, and varied in gus activity (440-2568 pmol, 4-MU/mg protein) by fluorimetry. The plants showing GUS activity were confirmed of containing GUS and NPT-II genes by polymerase chain reaction (PCR). Within 3 months, transgenic buckwheat plants were able to obtained from the hypocotyl segments.

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Fabrication of Fluorine Doped Diamond-Like Carbon Stamp for UV-Nanoimprint Lithography (UV 나노임프린트 리소그래피를 위한 불화 함유 다이아몬드 상 탄소 스탬프의 제작)

  • Ozhan Altun Ali;Jeong Jun-Ho;Rha Jong-Joo;Choi Dae-Geun;Kim Ki-Don;Lee Eung-Sug
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2006.05a
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    • pp.145-146
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    • 2006
  • A fluorine-doped diamond-like carbon (F-DLC) stamp which has high contact angle, high UV-transmittance and sufficient hardness, was fabricated using the following direct etching method: F-DLC is deposited on a quartz substrate using DC and RF magnetron sputtering, PMMA is spin coated and patterned using e-beam lithography and finally, O2 plasma etching is performed to transfer the line patterns having 100 nm line width, 100 nm line space and 70 nm line depth on F-DLC. The optimum fluorine concentration was determined after performing several pre-experiments. The stamp was applied successfully to UV-NIL without being coated with an anti-adhesion layer.

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Concentrations of Total Protein, Bilirubin, Sodium and Potassium in Blood Sera and Thymol Turbidity of Race Horses (경주마(競走馬) 혈청(血淸)의 단백질(蛋白質), Bilirubin, Sodium 및 Potassium 농도(濃度)와 Thymol Turbidity)

  • Shin, Kwang Soon;Rha, Dong Jin;Moon, Hi Joo;Cho, Jong Hoo
    • Korean Journal of Veterinary Research
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    • v.14 no.1
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    • pp.23-27
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    • 1974
  • Concentration of total protein, bilirubin, sodium and potassium in blood sera, and thymol turbidity of race horses, 78 males and 57 females aging from 2 to 5 years, were estimated. The results obtained were as follows: 1. Serum of race horses was low in protein concentrations as mean values of $5.48{\pm}0.77$ g/100ml. 2. Serum bilirubin was in normal range as mean values of total bilirubin, direct bilirubin and indirect bilirubin were $1.05{\pm}0.57$, $0.12{\pm}0.05$ and $0.93{\pm}0.58$ mg/100ml, respectively. 3. Mean value of serum thymol turbidity was $1.41{\pm}0.72$ S-H unit. 4. Mean values of serum sodium and potassium of race horses from Australia were $143{\pm}8.7$ and $3.85{\pm}0.53$ mEq/liter, respectively, and mean values of serum sodium and patassium of race horses from Japan were $142{\pm}9.4$ and $3.58{\pm}0.60$ mEq/liter, respectively.

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An Analysis of the Pattern and Formation of Corset Look on the Domestic Market (국내 시판 코르셋 룩의 패턴 및 구성 실태분석)

  • Jung, Hyun-Jung;Rha, Soo-Im
    • Journal of Fashion Business
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    • v.14 no.5
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    • pp.66-77
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    • 2010
  • This study aimed at examining the pattern and detailed formation of corset look which has established itself as a sort of fashion look as people began to wear underwear as part of outer garment. The study tried to present basic materials helpful for developing and creating the design and pattern of corset look. First, the collected corset look of each brand was copied and then developed. According to the result, corset look's representative silhouette turned out to be hourglass silhouette that tightened up the waist with an emphasis on expressing the beauty of the body. However, unlike corsets of the past, corsets today are being created with focus on the design rather than using lots of incision lines. Second, The bust girth of corset look items turned out to have little function to compress and deform the body like the corset of the past that was far smaller than the body. In addition, the corset style that used the lines of corset alone as motive turned out to have the larger waist girth. Third, the dismantling of collected corset look showed that the materials and formation features of corset look have become simple and that the simplification of corset look has made the items of corset look everyday clothes which can be worn practically and universally.

A Study on the Research Trends in Supply Chain Management in Korea using Network Text Analysis (공급사슬관리 국내연구동향 분석: 네트워크 분석을 활용하여)

  • Rha, Jin Sung
    • Journal of Korea Society of Industrial Information Systems
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    • v.25 no.1
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    • pp.41-53
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    • 2020
  • Supply chain management (SCM) became a critical success factor for firms. As a result, researchers have carried out related research on SCM. This study aims to explore the research trends in SCM in Korea using network text analysis. We collected the information of 586 articles published in Korean journals using the RISS database, and analyzed the network generated by keywords proposed in the articles. The results showed that there are five research keyword clusters such as logistics, information systems, partnership, risk management, and sustainability.

The Effect of External-feedback Weight-bearing Training Protecting a Fall in Hemiplegic Patients (성인 편마비환자의 외적 되먹임 체중부하훈련이 낙상예방에 미치는 효과)

  • Rha, Young-Hyoun;Goo, Bong-Oh;Rho, Min-Hee;Ahn, So-Youn
    • Journal of the Korean Society of Physical Medicine
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    • v.2 no.2
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    • pp.143-150
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    • 2007
  • Purpose : This article was a quasi-experimental study that applies to external -feedback weight-bearing training among hemiplegic patients with a stoke. Methods : It examined whether position sense and balance can improve fall efficacy and prevent a fall. The subject of study was divided in two; Experimental group had 18 people and control group had 16 people. It took 8 weeks to finish training. Experimental group provides external-feedback weight-bearing training for ten minutes after neurological treatment for 20 minutes and control group provides nerves treatment for 30 minutes. To find the effect of a fall assessed position sense, balance and fall efficacy of the lower limbs before the fact, after 4 weeks and 8 weeks. Results : According to the conclusions, external-feedback weight-bearing training to prevent a fall was more effective intervention in experimental group than in control group. Conclusion : This study suggests that external-feedback weight-bearing training is a intervention to prevent the fall of hemiplegic patients with a stroke effectively.

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A Case Report of the Piriformis Syndrome Treated by Caudal Steroid and Local Anesthetic (이상근 증후군 치험 1례)

  • Jeong, Chang-Young;Yeon, Myung-Ha;Im, Woong-Mo;Kim, Byu-Rha
    • The Korean Journal of Pain
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    • v.8 no.1
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    • pp.149-151
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    • 1995
  • Piriformis syndrome is a syndrome of low back and leg radiating pain thought to be due to a chronic contracture of the piriformis muscle that causes irritation of the sciatic nerve. The piriformis muscle is a flat pyramidal muscle, an external rotator and abductor of the hip, originating from the front of the sacrum and inner aspect of the sacroiliac joint, then passes laterally out of the sciatic notch to attach posteriorly to the greater trochanter of the femur, the sciatic nerve passes between the two bellies of the muscle. Mechanical irritation of the sciatic nerve by an inflammatory reaction of the piriformis muscle and its fascia at this pelvic level causes pain to radiate in the dermatomal regions of the nerve roots similar to that disk entrapment. diagnosis of piriformis syndrome is made primary on the basis of history and clinical examination. The incidence is considerably higher in women, with the reported ratio of women to men of 6:1. These patients frequently present with associated symptoms of pelvic pain and/or dyspareunia. Symptoms are usually unilateral but occasionally be bilateral. We had a 42 year-old woman patient with low back and left leg radiating pain and dyspareunia treated by caudal steroid and local anesthetic.

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Microvascular Anastomosis in Neurosurgical Field (신경외과 영역에서의 미세혈관 문합술)

  • Rha, Hyoung-Kyun;Lee, Kyung-Jin;Cho, Kyung-Keun;Park, Sung-Chan;Park, Hae-Kwan;Cho, Jung-Ki;Ji, Chul;Choi, Chang-Rak
    • Archives of Reconstructive Microsurgery
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    • v.8 no.2
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    • pp.170-175
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    • 1999
  • Objective : Extracranial-intracranial(EC-IC) microvascular anastomosis was performed in 18 patients with hemodynamic cerebral ischemia and traumatic cerebral aneurysm, the aim of this retrospective study was to assess its value in neurosurgical field. Method : Of 18 cases, 17 case were hemodynamic cerebral ischemia and one was traumatic cerebral aneurysm. There were 14 superficial temporal artery(STA)-to-middle cerebral artery(MCA) anastomosis, 3 saphenous vein graft bypass(2 external carotid artery(ECA)-to-MCA, 1main trunk of the STA-to-MCA) and 1 radial artery bypass(ECA-to-MCA). Results : Bypass patency was confirmed by postoperative angiography in all cases except for two cases, postoperative cerebral blood flow of ischemic brain showed significant increased in all cases with good patency through bypass. Conclusion : Revascularization by EC-IC microvascular anastomosis to the ischemic brain eliminated ischemia and was associated with excellent good outcome and good patency rates.

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