• 대한기계학회논문집A
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• 제27권2호
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• pp.255-261
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• 2003

It is advantageous to use NDE methods to assess the mechanical properties of materials since the conventional method is time-consuming and sometimes requires cutting of sample from the component. The NDE parameters such as ultrasonic velocity and attenuation, electric resistivity, and magnetic coercive force and remanance have been utilized to evaluate changes of material properties due to heat treatment condition. It has been found that changes of materials properties under quenched and tempered/PWHT treatments could not be detected using EMAT and Electrical resistivity methods. However, victors hardness and magnetic hysteresis loop decreased with heat treatment procedures. These results were obtained using 3Cr-lMo-0.25V steel. The magnetic parameters were found to be most sensitive to changes of material properties.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2018년도 전력전자학술대회
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• pp.280-281
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• 2018

The methods for adjusting the output voltage as well as the heater temperature of a single-phase inverter for the heat treatment are proposed. The output voltage of the single-phase inverter is limited to 60 V for safety. The time constant of heater temperature is much higher than that of the output voltage. The stability may be deteriorated due to such large time constant difference. In order to ensure the stability, a hysteresis on/off control method for the heater temperature control is used. The performances for the proposed methods are verified with the experiments.

• The Journal of Korean Physical Therapy
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• 제28권3호
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• pp.201-204
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• 2016

Purpose: The purpose of this study was to compare the immediate effects of alternative treatment methods in lowering the blood pressure and pulse of prehypertensive patients. Methods: A total of 48 prehypertensive patients were randomly divided into 4 groups of 12 patients and each group received a different intervention. The control group was made to rest, the heat pack (HP) group received heat pack treatment, the ultrasound (US) group received an ultrasound massage, and the myofascial release (MFR) group received myofascial release. The blood pressure and pulse rate were measured before and after intervention. Results: Following intervention, the patients of the MFR group showed a decrease in systolic pressure, diastolic pressure, and pulse rate. Although blood pressure was similar in all groups, a significant decrease in pulse rate was seen in the MFR group compared to others. Conclusion: The application of MFR was shown to be an effective method for lowering the blood pressure and pulse rate in prehypertensive patients.

• 약학회지
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• 제56권3호
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• pp.145-151
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• 2012

To develop fundamental data of herbal materials with heat treatment, we studied analytical and extraction methods of benzopyrene in black ginseng and validated by HPLC analysis. Benzopyrene was successfully separated in mobile phase of acetonitrile:water (80 : 20) and detection of excitation 294 nm, emission 404 nm. The calibration curve of benzopyrene was linear over the concentration range of 1.17~37.50 ng/ml with correlation coefficient of above 0.999. The limit of detection (LOD) and quantitation (LOQ) of benzopyrene was 0.25 and 0.75 ng/ml, respectively. Hexane extraction method was used as a new extraction method for benzopyren and the efficient of extraction was over 95%. In conclusion, analytical method and extraction method were suitable for the determination of benzopyrene in the black ginseng and could be applied to fundamental study and guideline of herbal materials with heat treatment.

• 대한물리치료과학회지
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• 제9권4호
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• pp.35-44
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• 2002

The purpose of this study was to compare the effect of heat therapy, stretching exercise and to verify which method was most effective for lumbar flexibility improvement. Subjects were 20 apparantly healthy person(male10, female10) who did not have any medical problem. They were randomly divided and assigned into 2 groups: heat therapy, stretching exercise. For testing flexibility, trunk flexion, bunk extension, and Schober-test were performed. Pre-test was done prior to the each group's treatment. Test was done at 2nd week, 4th week and 6th week. There were no significant difference in improvement of trunk flexion and trunk extension after 6 weeks treatment among 2 methods. However in all 2 groups, there were statically significant improvement in flexibility as time go on. The rate of improvement was highest at 2nd week, while this was attenuated afterwards. The Schober-test score changed significantly from pre-test to the mid-test and to the post-test, while there were no significant difference among 2 methods of treatment. With the results above, it was concluded that heat therapy, stretching-exercise were all effective for improving flexibility without any significant priorities.

• 한방안이비인후피부과학회지
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• 제35권4호
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• pp.106-122
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• 2022

Objectives : In this study, we aimed to analyze the latest knowledge of pityriasis rosea(PR) through oriental-western medical review on PR. Methods : We searched Pubmed, CNKI, and OASIS to select papers related to the cause, mechanism, diagnosis, classification, treatment, and herbal treatment of PR. Results : The results are as follows. 1. Although the exact cause of PR is not known, it has recently been found that reactivation of latent human herpesvirus-6 and human herpesvirus-7 infection is a possible etiology. Most patients require emollients, antihistamines, topical steroids, and macrolides. Acyclovir, and narrow-band UVB therapy are also used. 2. The cause and mechanism of PR in Chinese and Korean medicine can be mainly summarized as wind-heat, blood heat, and blood deficiency and wind-dryness. Most of the herbal medicine used have the effects of clearing heat, cooling the blood, detoxifying, dispelling wind, relieving itching, nourishing blood, and moistening dryness. Conclusions : In Chinese and Korean medicine, it is necessary to organize the representative prescriptions according to pattern identification, and it is also necessary to study the atypical types of PR and its treatment methods. It is thought that research on oriental and western combination therapy should be continuously conducted, and efforts to develop Korean medicine formulations are needed to revitalize clinical research in Korea.

• 전기학회논문지P
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• 제62권1호
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• pp.45-49
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• 2013

High frequency system has been used for the purpose of skin care and obesity treatment, by high-frequency energy is applied to the human body generates deep heat. Conventional high frequency system could not selection control by depending on the body load fluctuations. Such as burns and side effects have been reported by system instability and then therapeutic effect is insufficient. During treatment, objective information about the status of the patient was no. Because of treatment methods are subjective, and so tailored treatments were impossible. In this paper, high frequency medical system with sinusoidal frequency characteristics without distortion of the Push pull switching scheme for pain relief therapy was designed. And control circuit that was designed by feedback using the output changes according to the body-load fluctuation. Last, power circuit for efficient control the heat generated from the hardware was proposed.

• 대한한의학회지
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• 제38권4호
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• pp.82-89
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• 2017

Objectives: We here do propose that cancer treatment moxibustion should be used both direct moxibustion and electro-moxibustion simultaneously. Methods: Electro-moxibustion is used in $38^{\circ}C$ low-heat level and it will help to raise parasympathetic and to bring stability of mentality. Direct moxibustion is used in rice size and will help to raise sympathetic and to induce visceral reflection and visceral motion. Results: Electro-moxibustion increased average body heat by $+2.51^{\circ}C$ and kept patients from suffering pains. Direct moxibustion increased average body heat by $+1.2^{\circ}C$ by meridian point-internal organs reflection. Conclusions: Both use of direct moxibustion and electro-moxibustion simultaneously will be superior to the only either direct moxibustion or electro-moxibustion for cancer treatment moxibustion.

• 한국주조공학회지
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• 제13권6호
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• pp.555-562
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• 1993

A study was investgated the relationship between fracture characteristics and microstructure changes according to Cu addition and heat treatment methods on the ductile cast iron. According to increment of Cu addition pearlite volume fraction was increased due to the deffect of anti-ferritizing of Cu. At the case of austempering heat treatment, fracture toughness of Cu contained specimen was decreased. The reason for the results seems to be responsible for decrement of plastic zone size at the crack tip. It was observed that the excellent fracture toughness can be obtained at the condition of normalizing and the specimen was not contained Cu. Under the such conditions, fractographs is composed of dimple pattern and fracture toughness 71.6MPa $\sqrt{m}$, tensile strength determined as the value of 961.6MPa, respectively.

• Journal of Magnetics
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• 제20권2호
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• pp.155-160
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• 2015

Recently, $CO_2$ emission standards and fuel efficiency legislation has been tightened globally. Therefore automotive alternator performance becomes increasingly important to meet the requirements. Many proposed methods have suggested adding magnets or regulation control to increase alternator efficiency and output. However, this creates a significant additional cost. During the stator lamination process, the magnetic property of the stator deteriorates mainly due to stamping and slinky process for an alternator. To maximize the alternator performance, heat treatment of the stator core was performed and magnetic properties were compared to find the optimal condition. Finally, alternator output and efficiency test were performed resulting in significant output and efficiency improvement up to 6.8% and 0.6% respectively.