• Title/Summary/Keyword: Deep heat

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Proposal of an Improved Concept Design for the Deep Geological Disposal System of Spent Nuclear Fuel in Korea

  • Lee, Jongyoul;Kim, Inyoung;Ju, HeeJae;Choi, Heuijoo;Cho, Dongkeun
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.18 no.spc
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    • pp.1-19
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    • 2020
  • Based on the current high-level radioactive waste management basic plan and the analysis results of spent nuclear fuel characteristics, such as dimensions and decay heat, an improved geological disposal concept for spent nuclear fuel from domestic nuclear power plants was proposed in this study. To this end, disposal container concepts for spent nuclear fuel from two types of reactors, pressurized water reactor (PWR) and Canada deuterium uranium (CANDU), considering the dimensions and interim storage method, were derived. In addition, considering the cooling time of the spent nuclear fuel at the time of disposal, according to the current basic plan-based scenarios, the amount of decay heat capacity for a disposal container was determined. Furthermore, improved disposal concepts for each disposal container were proposed, and analyses were conducted to determine whether the design requirements for the temperature limit were satisfied. Then, the disposal efficiencies of these disposal concepts were compared with those of the existing disposal concepts. The results indicated that the disposal area was reduced by approximately 20%, and the disposal density was increased by more than 20%.

Improvement on the Formability of Magnesium Alloy Sheet by Heating and Cooling Method (가열냉각방법에 의한 마그네슘합금의 판재성형성 개선)

  • Kang Dae-Min;Manabe Ken-ich
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.6
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    • pp.93-98
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    • 2005
  • The purpose of this study is to confirm the improvement of formability of AZ31 magnesium alloy sheet by using local heating and cooling technique. For this, the experiments of warm deep drawing were done under the temperatures of $100^{\circ}C\~400^{\circ}C$, and the punch velocity of 10, 100mm/min. Also FE analysis under the temperatures of blankholder and die of $150^{\circ}C,\;225^{\circ}C\;and\;300^{\circ}C$ for tools(holder and die) was executed with considering heat teansfer. From the results, the formability of AZ31 magnesium alloy, espicially the temperatures of $225^{\circ}C\~250^{\circ}C$ for tools(holder and die)improved remarkably. And the experiments and simulations showed that necking under room temperature for tools occured under the part of punch shoulder while at $300^{\circ}C$ for tools, at the part of die shoulder.

Diagnosis and Treatment of Temporomandibular Disorder in Pregnant Women (임신부에서 측두하악장애의 진단과 치료)

  • Cha, Ji-Hyun;Park, June-Sang;Ko, Myung-Yun
    • Journal of Oral Medicine and Pain
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    • v.25 no.2
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    • pp.241-245
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    • 2000
  • In this case report, I discussed the diagnosis and treatment of two pregnant women with temporomandibular disorders(TMD) who visited the Department of Oral Medicine, PNUH. Also, I reviewed some investigations of diagnosis and treatment of TMD in pregnant women. The obtained results were as follows; 1. No single X-ray diagnostic procedure for TMD results in radiation dose that threatens the well-being of the developing embryo and fetus. 2. Most non-steroidal anti-inflammatory drugs(NSAIDs) have commonly used because these drugs are considered to be nonteratogenic, but these agents are not recommended for routine use after 3rd trimester. 3. Electro-acupuncture stimulation therapy(EAST) is contraindicated for 1st trimester, and ultrasonic deep heat therapy, microwave deep heat therapy, low level laser therapy, myo-monitor are not contraindicated for pregnant women but clinician must consider some risk of adverse fetal effects. 4. The occlusal stabilization splint may be used for pregnant women, if it is fabricated indirectly. 5. Surgical treatment is contraindicated for pregnant women.

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Breast Cancer Detection with Thermal Images and using Deep Learning

  • Amit Sarode;Vibha Bora
    • International Journal of Computer Science & Network Security
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    • v.23 no.8
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    • pp.91-94
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    • 2023
  • According to most experts and health workers, a living creature's body heat is little understood and crucial in the identification of disorders. Doctors in ancient medicine used wet mud or slurry clay to heal patients. When either of these progressed throughout the body, the area that dried up first was called the infected part. Today, thermal cameras that generate images with electromagnetic frequencies can be used to accomplish this. Thermography can detect swelling and clot areas that predict cancer without the need for harmful radiation and irritational touch. It has a significant benefit in medical testing because it can be utilized before any observable symptoms appear. In this work, machine learning (ML) is defined as statistical approaches that enable software systems to learn from data without having to be explicitly coded. By taking note of these heat scans of breasts and pinpointing suspected places where a doctor needs to conduct additional investigation, ML can assist in this endeavor. Thermal imaging is a more cost-effective alternative to other approaches that require specialized equipment, allowing machines to deliver a more convenient and effective approach to doctors.

Gas Hydrate BSR-derived Heat Flow Variations on the South Shetland Continental Margin, Antarctic Peninsula (가스수화물 BSR을 이용한 남극반도 남쉐틀랜드 대륙주변부의 지열류량 변화)

  • Jin, Young-Keun;Nam, Sang-Heon;Kim, Yea-Dong;Kim, Kyu-Jung;Lee, Joo-Han
    • Ocean and Polar Research
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    • v.25 no.2
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    • pp.201-211
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    • 2003
  • Bottom simulating reflectors (BSR), representing the base of the gas hydrate stability field, are widespread on the South Shetland continental margin (SSM), Antarctic Peninsula. With the phase diagram fur the gas hydrate stability field, heat flow can be derived from the BSR depth beneath the seafloor determined on multichannel seismic profiles. The heat flow values in the study area range from $50mW/m^2$ to $85mW/m^2$, averaging to $65mW/m^2$. Small deviation from the average heat flow values suggests that heat flow regime of the study area is relatively stable. The landward decrease of heat flow from the South Shetland Trench to the continental shelf would be attributed to the landward thickening of the accretionary prism and the upward advection of heat associated with fluid expulsion. The continental slope 1500m to 3000m deep, where BSRs are most distinguished in the SSM, shows relatively large variation of heat flow possibly due to complex tectonic activities in the study area. The local high heat flow anomalies observed along the slope may be caused by heat transport mechanisms along a NW-SE trending large-scale fault.

Heat source modeling of laser arc hybrid welding considering keyhole formation (키홀 형성을 고려한 레이저 아크 하이브리드 용접 열원 모델링)

  • Jo, Yeong-Tae;Na, Seok-Ju
    • Proceedings of the KWS Conference
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    • 2005.06a
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    • pp.97-99
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    • 2005
  • Laser arc hybrid process is actively researched as a new welding method since it has several advantages by the combination of laser beam and electric arc. By the coupling of two different heat sources, laser and arc mutually assist and influence. High power laser can make the deep keyhole and arc plasma can form the large bead shape. In this paper the effect of two different heat sources to weld bead are investigated and as a result of analysis, it is shown that the lower part of keyhole is heated by laser and the upper part of weld pool is dominantly heated by arc.

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The immunopharmacologic study of drugs for clearing away heat and detoxicating(I) (청열약류(淸熱藥類)의 면역약리학적(免疫藥理學的) 고찰(考察)(I))

  • Lee, Min-hyung;Seo, Young Bae
    • Journal of Haehwa Medicine
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    • v.9 no.2
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    • pp.135-157
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    • 2001
  • In the result of investigating traditional chinese medical literatures to understand definite immunopharmacologic effects of drugs for clearing away heat and detoxicating such as Sophorae tonkinensis Radix, Houttuyniae Herba, Smilacis glabrae Rhizoma, Belamcandae Rhizoma, Lasiosphaera seu Calvatia, Paridis Rhizoma, Lobeliae chinensis Herba, we could reach conclusions as follows: 1. Sophorae tonkinensis Radix, Houttuyniae Herba can increase voracity of leukocytes and activities of T cells. 2. Sophorae tonkinensis Radix, Smilacis glabrae Rhizoma can inhibit DTH. 3. Sophorae tonkinensis Radix, Houttuyniae Herba increase activities of B cells in low density but decrease activities of B cells in high density. 4. Sophorae tonkinensis Radix, Houttuyniae Herba, Smilacis glabrae Rhizoma, Belamcandae Rhizoma have anti-inflammatory effects. Studies about drugs for clearing away heat and detoxicating is on. but their range is wide and their effects are numerous. Therefore. we think that more deep and wide researches about them shoud be accomplished.

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Analyses on Thermal Stability and Structural Integrity of the Improved Disposal Systems for Spent Nuclear Fuels in Korea

  • Lee, Jongyoul;Kim, Hyeona;Kim, Inyoung;Choi, Heuijoo;Cho, Dongkeun
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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    • v.18 no.spc
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    • pp.21-36
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    • 2020
  • With respect to spent nuclear fuels, disposal containers and bentonite buffer blocks in deep geological disposal systems are the primary engineered barrier elements that are required to isolate radioactive toxicity for a long period of time and delay the leakage of radio nuclides such that they do not affect human and natural environments. Therefore, the thermal stability of the bentonite buffer and structural integrity of the disposal container are essential factors for maintaining the safety of a deep geological disposal system. The most important requirement in the design of such a system involves ensuring that the temperature of the buffer does not exceed 100℃ because of the decay heat emitted from high-level wastes loaded in the disposal container. In addition, the disposal containers should maintain structural integrity under loads, such as hydraulic pressure, at an underground depth of 500 m and swelling pressure of the bentonite buffer. In this study, we analyzed the thermal stability and structural integrity in a deep geological disposal environment of the improved deep geological disposal systems for domestic light-water and heavy-water reactor types of spent nuclear fuels, which were considered to be subject to direct disposal. The results of the thermal stability and structural integrity assessments indicated that the improved disposal systems for each type of spent nuclear fuel satisfied the temperature limit requirement (< 100℃) of the disposal system, and the disposal containers were observed to maintain their integrity with a safety ratio of 2.0 or higher in the environment of deep disposal.

Deep learning based optimal evacuation route guidance system in case of structure fire disaster (딥러닝 기반의 구조물 화재 재난 시 최적 대피로 안내 시스템)

  • Lim, Jae Don;Kim, Jung Jip;Hong, Dueui;Jung, Hoekyung
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.23 no.11
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    • pp.1371-1376
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    • 2019
  • In case of fire in a structure, it is difficult to suppress fire because it can not accurately grasp the location of fire in case of fire. In this paper, we propose a system algorithm that can guide the optimal evacuation route in case of deep learning-based (RNN) structure disaster. The present invention provides a service to transmit data detected by sensors to a server in real time by using installed sensor, to transmit and analyze information such as temperature, heat, smoke, toxic gas around the sensor, to identify the safest moving path within a set threshold, to transmit information to LED guide lights and direction indicators in a structure in real time to avoid risk factors. This is because the information of temperature, heat, smoke, and toxic gas in each area of the structure can be grasped, and it is considered that the optimal evacuation route can be guided in case of structure disaster.

The characteristics of bead welding on steel with process parameter during the laser-arc hybrid welding(II) - Effect of heat input parameters - (강의 레이저-아크 하이브리드 용접시 공정변수에 따른 비드용접특성 (II) - 용접 입열 변수의 영향 -)

  • Kim, Jond-Do;Myung, Gi-Hoon;Park, In-Duck
    • Journal of Welding and Joining
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    • v.33 no.2
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    • pp.91-96
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    • 2015
  • The laser-arc hybrid welding of SS400 steel was carried out with the use of disk laser equipment of 6.6kW maximum power and MAG equipment of pulse mode. Parameter regarding heat input is one of the most important factors that directly affect penetration characteristics and welding defect. Therefore in this study, the effects of laser power, welding speed and current, voltage and pulse correction were investigated. As experiment result, it was found that the lower heat input, the more likely humping bead is formed at the back, and such humping bead could be suppressed by increasing laser power and arc current or decreasing welding speed, thus increasing heat input. Also deep penetration could be achieved by reducing arc voltage or pulse correction parameter in the same welding condition.