• 천문학논총
• /
• 제30권2호
• /
• pp.499-502
• /
• 2015

Starburst galaxies have strong star formation activity and generate large scale outflows which eject a huge amount of gas mass. This process affects galaxy activity, and therefore, the detailed study of nearby starburst galaxies could provide valuable information for the study of distant ones. So far there have been only a few studies of galactic-scale molecular outflows due to the sensitivity limitation of telescopes. Our study provides two nearby examples, NGC 2146 and NGC 3628. We used Nobeyama Millimeter Array (NMA) CO(1-0) data, Chandra soft X-ray data, and NMA 3 mm data to study the kinematics of molecular outflows, their interaction with ionized outflows, and the star forming activity in the starburst region. We found that the gas ejected through molecular outflows is much more significant than that used to form stars.

• 전기의세계
• /
• 제29권2호
• /
• pp.118-128
• /
• 1980

The properties of plasmas produced by high power glass laser were investigated with various methods of diagnostics. Electron temperature was estimated by measurement of soft X-ray, and ion temperature was estimated by measurement of the time-of-flight of ion. The measurement of incident and reflected laser light, and Schlieren and shadowgragh methods were also used. No influence of laser pulse duration on the temperature was observed in the case of durations 2, 4 and 10 nsecs. The effective heating of plasma occurred in about 2 nsec of beginning of incident laser pulse. The experimental results for fast rising laser pulse were discussed and the influence of resetime of laser pulse on the heating of plasma was described. Neutrons produced by irradiating laser beam to solid deuterium target were detected.

• 한국표면공학회지
• /
• 제29권5호
• /
• pp.512-518
• /
• 1996

Amorphous carbon nitride (a-C:N) multilayerfilms are formed by using altermating conditions during film deposition in are ion plating process. Because hard a-C:N films prepared with suitable megative bias voltages have large compressive stress, it is difficult to increase film thickness more than 200nm. Preparing multilayer films composed of hard layers and soft layers, we can grow thick multilayer films on Si and SKH steel substrate. The total thickness of multilayer films is more than 1$\mu\textrm{m}$. The multilayer films are several times thicker than the single layer films and almost equal in hardness and internal stress to the single layer ones. X-ray photoelectron spectroscopy(XPS) and Raman spectroscopy reveal that multilayer films equal to single layer films in structure, which is similar to the structure of DLC films.

• 한국임상수의학회지
• /
• 제15권1호
• /
• pp.174-177
• /
• 1998

Two 7 months old Korean native beef calves, which were suspected as ergotisms were referred to the Veterinary Teaching Hospitals Chonnam National University in February 1997. Those showed severe lameness as a result of a dry gangrene of the lower part of both hindlimbs which unilaterally were detached, tail necrosis and retarded growth. On the skin of the extremities of both hindlimbs were clearly appeared indented line, hypertropic granuloma and hemorrhage, from which were isolated gicrosp$\theta$rum gysiNㅁt. On the X-ray views of hindlimbs and the longitudinal sectioned metatarsal bones were not observed any changes of osteomyelitis except slightly increased osteophytes and soft tissue swelling. Clnical and anatomical observations were suggested that these calves were affected by the ergotism.

• 한국자기학회지
• /
• 제5권5호
• /
• pp.507-510
• /
• 1995

A heat-treatment method of pre-annealing and then flash annealing(FA) has been used to improve the soft magnetic properties of nanocrystalline $Fe_{76}CuSi_{13}B_{10}$ and $Fe_{74}CuNb_{3}Si_{12}B_{10}$ alloys. Outstanding magnetic properties of nanocrystalline $Fe_{74}CuNb_{3}Si_{12}B_{10}$ alloy were attained by flash-annealing in air after annealed at $500^{\circ}C$ for 0.5hr below the crystallization temperature. The same results were obtained for $Fe_{74}CuSi_{13}B_{10}$ alloy. The measurment of relief of stress and X-ray diffraction were used to analyze the effect of flashannealing.

• 한국자기학회:학술대회 개요집
• /
• 한국자기학회 2008년도 Asian Magnetics Conference
• /
• pp.139.1-139.1
• /
• 2008

• 천문학회보
• /
• 제44권1호
• /
• pp.70.2-70.2
• /
• 2019

Strong radiation fields can change the ionization state of metals and hence cooling rates. In order to understand their effects on the momentum transfer from radiation and supernova feedback, we perform a suite of radiation-hydrodynamic simulations with radiation-modulated metal cooling. For this purpose, we pre-tabulate the metal cooling rates for a variety of spectral shapes and flux levels with the spectral synthesis code, Cloudy, and accurately determine the rates based on the local radiation field strength. We find that the inclusion of the radiation-modulated metal cooling decreases the total radial momentum produced by photo-ionization heating by a factor of ~3 due to enhanced cooling at temperature T~10^3-4 K. The amount of momentum transferred from the subsequent SN explosions, however, turns out to be little affected by radiation, as the main cooling agents at T~10^5-6 K are only destroyed by soft X-ray radiation which is generally weak. We further discuss the total momentum budget in various conditions.

• Archives of Plastic Surgery
• /
• 제48권6호
• /
• pp.641-645
• /
• 2021

A 3,480 g male neonate showed tachypnea symptom with a serum ionized calcium level of 0.66 mmol/L by routine clinical analysis. He was injected calcium gluconate intravenously through femoral vein catheter to treat the hypocalcemia. On second day after the injection, he started to show erythema in the flank area. The lesion became firm and changed into whitish crust consist of small crystals. Abdominal X-ray and ultrasonography showed the accumulation of calcium deposit in the subcutaneous layer of the lesion. Surgical debridement was performed to remove the crust with calcium deposit and acellular fish skin graft rich in omega-3 (Kerecis) was applied to the defect site for secondary intention of the defect wound. After 2 months, the skin and soft tissue defect were fully covered with healthy normal skin without depression or contracture. This report is a first case of iatrogenic calcinosis cutis without extravasation symptom.

• 대한영상의학회지
• /
• 제83권6호
• /
• pp.1366-1372
• /
• 2022

점액섬유육종은 고령자에서 가장 흔한 연조직 육종 중 하나이며 사지, 몸통 및 후복막에서 흔히 발생한다. 그러나 종격동 점액섬유육종은 매우 드물며 문헌에서도 몇 가지 사례만이 보고되었다. 이에 저자들은 66세 남성에서 수술로 확진된 전종격동 점액섬유육종의 영상 소견을 MRI 소견 중심으로 보고하고자 한다.

• 대한영상의학회지
• /
• 제81권2호
• /
• pp.423-427
• /
• 2020

혈관육종은 림프관 및 혈관 내피세포에서 기원하는 피부와 연부조직에서 흔히 발생하는 악성종양으로, 장간막에서 발생한 혈관육종은 드물게 보고되어 왔다. 저자들은 CT와 MRI에서 점진적으로 조영증강되는 종괴로 내부에 출혈과 괴사 부분을 포함한 원발성 장간막 혈관육종의 1예를 경험하여 이를 보고하는 바이다.