• Title/Summary/Keyword: penetrating

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The Latest Technology Trend of LED Phosphors

  • Yoon, Chul-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.1349-1349
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    • 2008
  • The applications of white LEDs has been expanded from mobile phone to LCD TV as a backlight source recently and now are penetrating into the lighting market. With these changes new requirements for LEDs phosphors are demanded. In this point of view recent technology trend of phosphors for LCD backlight and lighting will be discussed.

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Surgical Treatment of Traumatic Ventricular Septal Defect by Penetrating Chest Injury (흉부관통상으로 인한 심실중격결손의 치료)

  • 김시욱;한종희;강민웅;나명훈;임승평;이영;최시완;유재현
    • Journal of Chest Surgery
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    • v.37 no.12
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    • pp.999-1002
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    • 2004
  • Thirteen year old boy who had been stabbed in his left chest by the knife was transferred to our department from a general hospital, because of the massive bleeding from the intercostal tube drainage. Chest X-ray showed homogeneous density in the left lung field. He was confused and his vital signs were unstable. He was moved into a operating room as soon as possible. After resuscitation, his lacerated left ventricle wound was sutured through median sternotomy. The interventricular shunt was detected with intraoperative transesophageal echocardiography. The traumatic ventricular septal defect was closed via left ventricle using Dacron patch. His postoperative course was uneventful, and he was discharged with small residual shunt.

A Study on Test Method for Evaluating Root Resistance in Waterproofing and Root Resistance Membrane Used in Landscape Architecture - A Test Method for Evaluating Root Resistance that Use a Simulated Needle and a Rhizome - (조경 녹화용 방수.방근층의 방근 성능평가 시험방법에 관한 연구 - 모의 바늘과 지하경을 이용한 방근 성능평가 시험방법 -)

  • Yi, Jun-Ho;Pyo, Soon-Ju;Shin, Jin-Hak;Oh, Sang-Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2009.05c
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    • pp.89-97
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    • 2009
  • As landscaping building roofs and concrete structures increase gradually for low carbon green growth policy of government, But waterproofing membranes of those structures are effecting by root penetration of landscape plant. 80, we progressed study about test method for fast evaluating root resistance of waterproofing materials jointly with Tokyo Institute of Technology. The result of the study is as follows: (1) The penetrating load of the needle at the displacement speed of 1mm/min was measured for various membrane to basis and lap joints of membrane, the load force was $3{\sim}50$ N by material variously. (2) According to the test method of deriving rhizomes of bamboo grass to basis and lap joints of membrane, there were no penetrated membrane until present, but need persistent observation. (3) Test method of deriving rhizomes of bamboo grass to basis and lap joints of membrane can shorten from period of 2 years to 1 year for testing. Because rhizomes of bamboo grass can grow from May to September, test is possible in same period.

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Unusual Bilateral Impalement Injury with Rusted Iron Bars on Face and Neck

  • Suh, Hyun Suk;Pak, Ji Hyun;Hong, Seung-Eun;Kang, So Ra
    • Archives of Craniofacial Surgery
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    • v.16 no.3
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    • pp.147-150
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    • 2015
  • Impalement injury is the subset of penetrating trauma, defined as fixed, elongated objects penetrate and remain in the human body cavity or region by relatively low velocity. We report an unusual case of facial and neck impalement where two dirty rusted iron bars penetrated forehead bilaterally and exited neck and ear respectively without causing major organ injuries. After thorough radiologic and physical evaluation, the patient got medical and surgical treatment. The patient was discharged without complication after four day of delayed wound closure. There have been no complications and sequelaes related with trauma, wound infection and scar contracture at 3-year follow-up. According to affected organs and pattern of impalement, individualized and multidisciplinary surgical approach should be considered. Following these guidelines as in this case, it was possible to achieve excellent clinical outcome in impalement injury.

A NUMERICAL METHOD TO ANALYZE GEOMETRIC FACTORS OF A SPACE PARTICLE DETECTOR RELATIVE TO OMNIDIRECTIONAL PROTON AND ELECTRON FLUXES

  • Pak, Sungmin;Shin, Yuchul;Woo, Ju;Seon, Jongho
    • Journal of The Korean Astronomical Society
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    • v.51 no.4
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    • pp.111-117
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    • 2018
  • A numerical method is proposed to calculate the response of detectors measuring particle energies from incident isotropic fluxes of electrons and positive ions. The isotropic flux is generated by injecting particles moving radially inward on a hypothetical, spherical surface encompassing the detectors. A geometric projection of the field-of-view from the detectors onto the spherical surface allows for the identification of initial positions and momenta corresponding to the clear field-of-view of the detectors. The contamination of detector responses by particles penetrating through, or scattering off, the structure is also similarly identified by tracing the initial positions and momenta of the detected particles. The relative contribution from the contaminating particles is calculated using GEANT4 to obtain the geometric factor of the instrument as a function of the energy. This calculation clearly shows that the geometric factor is a strong function of incident particle energies. The current investigation provides a simple and decisive method to analyze the instrument geometric factor, which is a complicated function of contributions from the anticipated field-of-view particles, together with penetrating or scattered particles.

A Study on Character of Consolidation for Radial Drainage of Pohang배s Clay Ground (포항 점토 지반의 수평배수 압밀특성 연구)

  • Lee, Song;Jeon, Je-Sung;Kim, Won-Young
    • Proceedings of the Korean Geotechical Society Conference
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    • 2000.03b
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    • pp.685-692
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    • 2000
  • Vertical drain used improvement soft clay is made of not only decreasing construction time but also increasing the ground strength during some decades. As, it is applied to improvement soft clay with vertical drain, it is designed by the result that is caused by oedemeter test ignored anisotropic of the ground related to consolidation conditions. When we are expected consolidation conditions, the most important factors is soil of compaction and water permeability. Above all, anisotropic of the ground permeability show the results which differ between vertical and radial drainage. Recently, We study for radial consolidation coefficient and permeability coefficient that utilized Rowe Cell Consolidation and permeability tester but, it dont use well because of not only a supply lack also difficulty of test. The paper experimented with searching anisotropic of the ground so there are Rowe Cell test, standard consolidation tester and modified standard consolidation test that have pohang's soft clay ground. Therefore, we find anisotropic of the ground and a tester of easy use more than before. We made a comparison test result between the devised tester and Rowe Cell tester, Also, we learned average degree of consolidation for partial penetrating vertical drains. We were found relations as effective stress-void and effective stress-permeability coefficient through those tests.

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Evaluation of Modified Extraluminal Prostheses Applied to the Trachea in Dogs (개의 기관에 적용한 변형제작한 기관외보철물의 평가)

  • 이충호;우흥명;권오경;남치주
    • Journal of Veterinary Clinics
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    • v.16 no.1
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    • pp.1-7
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    • 1999
  • The purpose of the present study was to evaluate the easiness of suture and fixation of modified total ring prostheses (m-TRP). Twelve healthy dogs (B.W.2-10 kg) were randomly assigned to three groups. In group A (3 dogs), total ring prostheses was fixed by penetrating a suture material through tracheal mucosa. In group B (3 dogs), TRP was fixed by suturing on tracheal cartilage and muscular layer not penetrating through tracheal mucosa. m-TRP was applied to the cervical portions (group M-C,3 dogs), and thoracic portions (group M-T,3 dogs). Operating time of group M-C (37.33$\pm$6.80 min.) was shorter than those of groups B (83.33$\pm$8.50 min.) and A (63.33$\pm$11.06 min.) (p<0.01). Clinical complications were minimal and limited to mild, short-term hematoma, vomiting, edema, and inflammation. Coughing remarkably decreased in group B rather than group A. Dyspnea was not showed in group A, B, and M-C, but group M-T had a mild dyspnea. Gross postmortem findings were similar in all groups. Mild adhesions were present between prostheses and adjacent structures, but tracheal lumen was clean. Severe adhesions were present where m-TRP had been applied in the thoracic portions. Histopathologic abnormalities included mild to moderate adventitial and periprosthetic fibrosis and mild adventitial inflammation. The present study indicated that m-TRP were easier in suture and fixation than TRP and had no differences in support for trachea and side effects.

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Clinical Study of 53 Patients Requiring open Thoracotomy After Thoracic Injuries (흉부외상 환자중 개흉술이 필요했던 53례에 관한 임상적 고찰)

  • 김규만
    • Journal of Chest Surgery
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    • v.24 no.11
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    • pp.1115-1124
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    • 1991
  • Recently the thoracic injuries have been markedly increasing due to the vast increase of traffic accident, industrial disaster, and incidental accident as well as the frequent use of the murderous weapons including gun or rifle. Because the thoracic injuries could involve the heart, lung, and great vessels, and would influence the lives, prompt diagnosis and adequate treatment are essential. Most of thoracic injuries can be managed with the conservative treatment and simple surgical procedure such as closed thoracostomy, but certain cases require open thoracotomy to preserve lives and to return to their normal environment. The authors have analysed the result of 53 cases of open thoracotomy after thoracic injuries mainly according to the patient`s chart review. The mean age was 33.4 years old and male to female ratio was about 5: l. Injury mechanisms that elicited thoracic trauma indicated for open thoracotomy were penetrating[47%] and non-penetrating[53%] injuries. The Most common type of the thoracic lesion was hemothorax with or without pneumothorax and diaphragm rupture was the second. 58\ulcornero of thoracic injuries were accompanied by abdominal injuries and 47% by bone fractures. 34 patients were operated within 24 hours after injury and their average elapsed time was 13.6 hour. The remained patients were operated after 24 hours and their average elapsed time was 7.8 days. 71 cases of operative procedures containing some overlappings were performed: diaphragm repair[28], bleeding control[12], pulmonary and cardiac repair[4 cases] Postoperative complication rate was 32.1% and operative mortality rate was 9.4%[5/53].

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Ventricular Septal Defect by Penetrating Chest Trauma - Report of One Case - (관통성 흉부 자상에 의한 심실중격 결손증: 증례보고)

  • Kim, Mun-Hwan;Lee, Cheol-Ju
    • Journal of Chest Surgery
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    • v.25 no.4
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    • pp.429-434
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    • 1992
  • We experienced a rare case of traumatic ventricular septal defect by penetrating stab injury The patient was 26-year-old women who got stab wound at the left anterior third intercostal space and left sternal border with a knife. seven hours after admission, the patient was undertaken an emergency thoracotomy due to hypovolemic shock caused by massive bleeding from transected left internal mammary artery, vein, and right ventricular outflow tract. On postoperative second day, the patient was suffered from moderate dyspnea, and arterial blood gas analysis and chest X-ray revealed hypoxemia and pulmonary edema. Right heart cardiac catheterization with Swan-Ganz Cathater showed oxygen step-up between right atrium and main pulmonary artery and a 1.6:1 ratio of pulmonary to systemic blood flow. At operation, harsh systolic thrill was palpable along right ventricular outflow tract. Through small vertical right ventriculotomy, the linear ventricular septal laceration on infundibular septum was noticed, and its size was 1.5cm with sharp margin This defeat was repaired by three interrupted matress sutures using Prolene 4-O with pledget. Her postoperative course was uneventful, and she discharged with good physical condition.

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Detection of the Pipe Leak for Water Distribution System Using Ground Penetrating Radar (GPR을 이용한 상수관로의 누수 탐사)

  • Park, In-Chan;Cho, Won-Cheol
    • Proceedings of the Korea Water Resources Association Conference
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    • 2006.05a
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    • pp.1271-1274
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    • 2006
  • 지하레이다(Ground Penetrating Radar, GPR)를 이용하여 지표하의 상수관로를 지표에서 송신안테나와 수신안테나를 이용해서 손쉽게 측정하게 된다. 송신안테나는 지표하에 전자기파를 송신하고 지하 매질을 투과한 파가 수신안테나에 도달하는 시간을 측정하여 지표하 매질의 특성을 파악할 수 있다. 수신파의 도달시간은 지표하 매질의 특성에 따라서 변화하며, 이를 통해 지표하 매질과 매질 깊이 등을 파악할 수 있다. 일반적으로 상수관로를 매설할 경우 관로 주변의 토양은 균등하게 되므로 기 매설된 상수관로 주변에 누수가 발생하게 되면, 관로 주변의 토양은 포화상태이거나 수압으로 인해서 공동이 형성될 경우가 많다. 이때 반사에너지의 유전율 증가 혹은 감소 특성으로 인해서 주변 매질과는 매우 상이한 결과를 보이게 된다. GPR탐사는 단순히 반사된 신호진폭의 크기를 나타내며 이러한 반사에너지의 크기에 관계되는 것은 매설물의 유전율이 주위 지반이 갖는 유전율과의 차이에서 기인하기 때문이다. 탐사 대상 상수관로에 대한 정보를 확보하여 GPR 탐사를 수행한 결과 관로 탐사를 위한 GPR의 결과는 매우 유용하게 사용될 것으로 판단되며, 이를 바탕으로 누수 발생 이력이 있는 다양한 관로주변 조건을 대상으로 탐사를 실시할 경우 상수관망시스템의 효율적인 관리 및 보수에 매우 유용한 방법이 될 수 있을 것으로 판단된다.

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