• Title/Summary/Keyword: heat-damage

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Study of the robot gripper cooling device for a high temperature material using peltier element (열전소자를 이용한 고온용 로봇 그리퍼 냉각장치에 관한 연구)

  • Shin, Gi-Su;Hong, Sung-Duk;Kim, Gun-Su;Kwon, Soon-Jae
    • Journal of the Korean Society of Industry Convergence
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    • v.18 no.1
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    • pp.37-44
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    • 2015
  • In the research, we developed a device for cooling the drive section of the gripper of a robot for handling the high temperature material. In this study, By using a Peltier element, the high-temperature material is not affected and driving cylinder is cooled to prevent damage due to high temperatures. Hot part of the Peltier element is towards the robot gripper. Cool part of the Peltier element is towards the driving cylinder. The heat sink portion is made to keep the cooling effect. As the performance result, cooling-test is taken, and their result is satisfy.

Complications of Laser Surgery of Larynx (레이저를 이용한 후두 수술의 합병증)

  • Park, Byung-Kuhn;Lee, Sang-Joon;Chung, Phil-Sang
    • Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
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    • v.22 no.1
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    • pp.30-33
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    • 2011
  • Laser is a relatively recent addition to laryngeal surgery. Since their invention, laser use and applications have expanded rapidly. The use of lasers in surgery has offered a time- and cost-efficient alternative to cold surgical techniques and has been used in the treatment of numerous laryngeal pathologies, including stenoses, recurrent respiratory papillomatosis, leukoplakia, nodules, malignant laryngeal disease, and polypoid degeneration (Reinke's edema). Despite the notable benefits, laser surgery is not without disadvantages. Laser heat can increase scarring and cause damage to adjacent tissue. With laser laryngeal microsurgery, there is potential for airway fire, endolaryngeal bleeding, perichondritis, chondritis, granuloma, surgical emphysema, laryngeal stenosis and web formation, postoperative edema and swallowing problem. Surgeons should be known about these complications and could manage properly.

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Properties of lightweight matrix for inorganic insulation by cement types (시멘트 종류별 무기단열재용 경량 경화체의 특성)

  • Lim, Jeong-Jun;Pyeon, Su-Jeong;Lee, Sang-Soo
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2018.05a
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    • pp.222-223
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    • 2018
  • Recent government policies are increasing interest in zero-energy housing, a building that minimizes energy consumption (90% reduction). As the importance of building passive performance is emphasized, the role of insulation is increasing as a way to reduce indoor heat loss in order to minimize the use of cooling and heating energy. There are two main types of insulation. Organic insulation is widely used for various construction structures such as construction and industrial due to some merits such as the convenience of construction and construction cost. However, it has been pointed out as a main cause every time a fire accident occurs, Jecheon Sports Center', the fire damage of buildings caused by the use of organic insulation materials is expanding to social problems, so it is urgent to research on nonflammable inorganic insulation materials.

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Thermal Shock Behavior of Barium Titanate Ceramics

  • Jae Yeon Kim;Young Wook Kim;Kyeong Sik Cho;June Gunn Lee
    • The Korean Journal of Ceramics
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    • v.3 no.3
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    • pp.195-198
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    • 1997
  • Post-firing process of electronic ceramic, such as electroding and encapsultion with resin, often causes damage by thermal shock. The thermal shock behavior of $BaTiO_3$ ceramics was investigated by the down-quench test, where the relative strength retained is determined after the sample is quenched from an elevated temperature into a fixed temperature bath. The critical temperature drop, $\DeltaTc$, was evaluated for three kinds of sintered $BaTiO_3$ ceramics, which were formed by extrustioin, uniaxial pressing using granules, and uniaxial pressing using powders. A drastic loss in strength caused by microcracking was observed for the specimens quenched with $\DeltaT\geq150^{\circ}C$. This concentp can be adopted as a method of the quality control by monitoring the sudden drop of the strength of capacitor products after each exposure to heat.

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Study of oriental medical science documentory records of vertigo and dizziness (현훈(眩暈)에 관한 문헌적(文獻的) 고찰(考察))

  • Park, Eun-Sook;Yoon, Il-Ji
    • Journal of Haehwa Medicine
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    • v.17 no.1
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    • pp.157-166
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    • 2008
  • 1. Vertigo and dizziness is also called as Mok-hyun, Hyun-mo, Pung-hyun, Du-pung-hyun-un, Du-sun. 2. Causes and processes of Vertigo and dizziness are mainly divided into external infection and internal damage. Wind, cold, dampness and summer heat are included in the one and in the other, vital energy and blood deficiency, insufficiency of the liver and kidney, retention of phlegm and fluid, emotional disorder and so on. 3. Symptoms of vertigo and dizziness are disequilibrium, nausea, inability of hearing, vomiting, sweating and syncope. 4. Treating of vertigo and dizziness are recovery of vital energy and blood deficiency, strenthening of insufficiency of the liver and kidney, drying of dampness and removing of phlegm.

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Pharmaceutical and clinical effects of Holyessing and its research strategy (목초액(木酢液)의 약리(藥理) 및 임상(臨床) 효능(效能)과 연구방향(硏究方向))

  • Kim, Han-Sung;Kim, Sung-Hoon
    • Journal of Haehwa Medicine
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    • v.7 no.1
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    • pp.831-835
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    • 1998
  • The concept of traditional oriental medicine and pharmaceutical and clinical effects were studied on holyessing obtained through carbonization of wood, before practical application. The results were obtained as follows: 1. Holyessing can be thought to be effective fluid to promote physiological metabolism as heat of water(水中之火) in the respest of oriental medicine. 2. Pharmaceutical effects of holyessing were reported to be antidiabetic effect, protective effect on liver, anticancer activity, protective effect against electronic damage, thermic effect, deodouring effect and proetcive action on atrophy dermatitis. 3. Several kinds of holyessing derived from other trees except of oak chiefly used so far had better be studied such as Morus bombycis. 4. Acute and chronic toxicity, combination of holyessing with other food, artifical correction of its taste and concentration should be absolutely studied.

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APPLICATION OF INFRARED THERMOGRAPHY IN DENTISTRY (치과에서의 적외선 체열사진의 응용)

  • Lee, Hoon;Kim, Su-Gwan
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.31 no.4
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    • pp.335-341
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    • 2005
  • This study discusses the effects of infrared thermography in dentistry. Infrared thermography allows the quantification of infrared rays and provides useful data for dental care and research. It has been used for the diagnosis of temporomandibular dysfunction (TMD) and proposed as an objective measure of myofascial pain. It is closely related to temperature and produces beneficial objective data. A study of the heat emissions from facial structures has the potential to benefit dental diagnosis of TMD, postoperative inferior alveolar damage, and endodontic and conservative treatments. In this paper, we assessed infrared thermography in dentistry and consider future developments of infrared thermography.

The Comparative study on the IgA Nephropathy and hematuria (요혈(尿血)과 IgA 현증(賢症)에 관(關)한 비교(比較) 고찰(考察))

  • Lee, Jung Won;Kim, Chul Jung
    • Journal of Haehwa Medicine
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    • v.9 no.1
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    • pp.409-421
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    • 2000
  • According to The Comparative study on the IgA Nephropathy and hematuria, the results were as follows. 1. IgA nephropathy is included in category of the hematuria the part in deficiency of liver-kidney and damp-heat in oriental medicine. 2. The symptoms of hematuia is changes in color of urine-bloody, dark brown, or rusty colored-without pain in oriental medicine. 3. It is occured IgA nephropathy due to vacuity exhaustion, fidgetiness, internal damage, imfection. 4. For the medical prescriptions due to IgA nephropathy are used Sogyeeumja, $Dayebunch\check{o}ngeum$(大分淸飮), Dangguieum(當歸飮), $Ch\check{o}ngjangtang$(淸腸湯), Silyungtang(柴岺湯), Kamisagunjatang(加味四君子湯) as hematuria of symtom of IgA nephropathy.

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Correlative Changes between Photosynthetic Activities and Chlorophyll Fluorescence in Wheat Chloroplasts Exposed to High Temperature

  • Young-Nam Hong
    • Journal of Plant Biology
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    • v.37 no.1
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    • pp.37-42
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    • 1994
  • Correlative changes between photosynthetic O2 exchange rates and room temperature Chl fluorescence were investigated in wheat (Triticum aestivum L.) chloroplasts treated with high temperature for 5 min. With increasing treatment temperature, photosynthetic O2 evolution rate mediated by PSII was decreased, showing 50% inhibition at 38$^{\circ}C$ (I50). But PSI activity measured by O2 uptake rates was stimulated as a function of increasing temperature. Dark level fluorescence (Fo)-temperature (T) analysis showed that fluorescence rising temperature (Tr), critical temperature (Tc), and peak temperature (Tp) was 38, 43, and 52$^{\circ}C$, respectively. Quenching analysis of Chl fluorescence showed that both the oxidized fraction of plastoquinone (qQ) and degree of thylakoid membrane energization (qNP) increased up to 4$0^{\circ}C$ and then declined dramatically. These results suggest that Tr is correlated with temperature showing a 50% of inhibition of photosynthesis and under mild high temperature stress, qNP is worth regarding as indicator for heat-induced damage of photosynthesis.

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Development of electric surgical machine by LC series resonance (LC 직렬공진에 의한 전기 수술기 개발)

  • Lee, Oh-Keol;Kim, Tae-Woo;Song, Ho-Shin
    • Proceedings of the KIEE Conference
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    • 2002.06a
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    • pp.153-157
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    • 2002
  • Electricity living body formation operation appliance is using most imports until present. And, because electricity living body formation operation appliance is too expensive, it becomes burden to buy in small scale hospital. Also, problem that economical damage by income is added follows, Therefore, this treatise developed electricity living body formation operation appliance by home production, Ultra high frequency eruption circuit used LC circuit, and output frequency is possible to 8 [MHz], and output voltage amplified maximum 800 [V]. This operation appliance could display size of fixed current. This developed product could microscopic operation fewer than 1 [mm]. This development technology is considered by do metallic surface heat treatment, melting, welding, induction heating device and that can apply to domestic animals surgical operation and so on.

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