• Korean Journal of Optics and Photonics
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• v.26 no.2
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• pp.73-82
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• 2015

This work demonstrates the indoor SI-traceable calibration of a transmissometer with a 75-m baseline for the measurement of visibility in MOR (Meteorological Optical Range). The calibration is performed using a set of neutral density (ND) filters (OD 0.1-2.5) and a set of high-transmission quartz glass plates (a bare quartz glass plate and antireflective-coated quartz glass plates), the collection consisting of 20 artifacts in total. The luminous transmittance values of the reference artifacts had been calibrated traceable to the KRISS spectral transmittance scale, which ranges from 0.2 % to 99.5 %. The transmissometer to be calibrated typically consists of a loosely collimated light source based on a white LED (CCT ~5000 K) and a luminous intensity detector with a CIE 1924 V(${\lambda}$) spectral response. As a result of calibration, we obtained the MOR error and its uncertainty for the transmissometer in 20 m - 40 km of MOR. Based on the results, we investigated the applicability of the calibration method and the conformity of the transmissometer to the ICAO's (International Civil Aviation Organization) accuracy requirement for meteorological visibility measurement. We expect that this work will establish the standard procedure for the SI-traceable calibration of a transmissometer.

• The Journal of Internal Korean Medicine
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• v.25 no.1
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• pp.138-148
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• 2004

Objective : Insomnia is the disorder of initiation or maintenance in sleeping that results in daytime sleepiness and dysfunction, and it arises from multiple psychological, physiological and environmental factors. A number of stroke patients suffer from insomnia are classified as sleep disorder patients with physical illness. In addition, insomnia may have profound deleterious effects on the natural course of stroke. We are to assess the effectiveness of intradermal acupucture on stroke combined with insomnia. Methods : We recruited hospitalized patients with insomnia after stroke. Then, the subjects were allocated into a treatment group and a control group by randomization. The treatment group received intradermal acupuncture therapy at He-7(神門), EH-6(內關) correctly. However in control group, intradermal acupuncture were just attached to He-7(神門), EH-6(內關) without insertion. Treatment over time at first day and second day a various indexes were repeatedly checked such as sleep latency, total sleep time, sleep quality, condition on awakening, ability of concentration, morning sleepiness, Insomnia Severity Index, and Athens Insomnia Scale. In the second analysis, we divided the treatment group into a response and a non-response group by their response to intradermal acupuncture. With the acupuncture treatment, accompanied symptoms were checked Results : Among thirty two subjects, two of them were dropped out: One complained the pain from needle insertion, and the other underwent the change of his herbal medication. At baseline investigation with the residual 30 subjects, the control and the treatment group were assessed to have an equal comparability. In the treatment group, sleep latency, total sleeping time, a number of awakenings, sleep quality and ability of concentration showed improvement significantly compared with the control group. The non-response Group showed symptoms such as nausea and halitosis, belching and acid regurgitation, abundant expectoration, while Responder Group showed palpitation, oppressed feelings in chest and sleep disorder. Conclusions: The result of this clinical study suggests that the intradermal acupuncture at He-7(神門), EH-6(內關) is one of the effective treatments for the insomnia after stroke.

• Radiation Oncology Journal
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• v.17 no.2
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• pp.146-150
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• 1999

Myasthenia gravis (MG) is relatively rare ouuring as one of important autoimmune disease to affect neuromuscular junction. This study was clinically to evaluate total body irradiation (TBI) against two patients including 33-year and 39-year females for chronic MG with thymoma who hospitalized in the St. Mary's Hospital, Catholic University since 1994 as well as who showed no response by thymectomy, immunotherapy and hormonal therapy. TBI designed by the dose of 150$\~$180 cGy consisting of 10 cGy per fraction, three times a week, for 5~e weeks using linear accelerator of 6 MV. During the treatment of TBI, they did complain acute side effect such as vomiting and also appear improved physical condition from 4$\~$6 weeks after TBI. Through the follow-up period of 18 or 42 months after TBI, they did not have any symptomatic recurrence. Consequently, the results suggest that TBI can be used as an alternative tool for the patients concurrently for MG with thymoma who had been refractory to various conventional therapies like thymectomy, immunotherapy and hormonal therapy.

• Korean Journal of Exercise Nutrition
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• v.24 no.2
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• pp.30-37
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• 2020

[Purpose] The present study investigated the effect of endurance exercise with blood flow restriction (BFR) performed at either 25% maximal oxygen uptake (${\dot{V}}O_2$ max) or 40% ${\dot{V}}O_2$ max) on muscle oxygenation, energy metabolism, and endocrine responses. [Methods] Ten males were recruited in the present study. The subjects performed three trials: (1) endurance exercise at 40% ${\dot{V}}O_2$ max without BFR (NBFR40), (2) endurance exercise at 25% ${\dot{V}}O_2$ max with BFR (BFR25), and (3) endurance exercise at 40% ${\dot{V}}O_2$ max with BFR (BFR40). The exercises were performed for 15 min during which the pedaling frequency was set at 70 rpm. In BFR25 and BFR40, 2 min of pressure phase (equivalent to 160 mmHg) followed by 1 min of release phase were repeated five times (5 × 3 min) throughout 15 minutes of exercise. During exercise, muscle oxygenation and concentration of respiratory gases were measured. The blood samples were collected before exercise, immediately after 15 min of exercise, and at 15, 30, and 60 minutes after completion of exercise. [Results] Deoxygenated hemoglobin (deoxy-Hb) level during exercise was significantly higher with BFR25 and BFR40 than that with NBFR40. BFR40 showed significantly higher total-hemoglobin (total-Hb) than NBFR40 during 2 min of pressure phase. Moreover, exercise-induced lactate elevation and pH reduction were significantly augmented in BFR40, with concomitant increase in serum cortisol concentration after exercise. Carbohydrate (CHO) oxidation was significantly higher with BFR40 than that with NBFR40 and BFR25, whereas fat oxidation was lower with BFR40. [Conclusion] Deoxy-Hb and total Hb levels were significantly increased during 15 min of pedaling exercise in BFR25 and BFR40, indicating augmented local hypoxia and blood volume (blood perfusion) in the muscle. Moreover, low-and moderate-intensity exercise with BFR facilitated CHO oxidation.

• Korean Journal of Crystallography
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• v.16 no.2
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• pp.141-148
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• 2005

It is well known that the general metals have a lot of grain boundaries. The grain boundaries play a negative role to increase the resistivity and to decrease the conductivity. The small resistivity and the large conductivity have been a goal of the material scientists, and no signal noise, perfect signal transfer, and the realization of the real sound are the dream of electronic engineers and audio manias. Generally, oxygen free copper (OFC) and Ohno continuous casting (OCC) copper cables have been used for the purpose of the precise signal transfer and low noise. However they still include a lot of grain boundaries. In our study, we have grown the single crystal by the Czochralski method and succeeded to produce single crystal wires from the crystal in the dimension of $0.5{\times}0.5{\times}2500mm$. The produced wire still possesses very good single crystal properties. We observed the structure of the wire, and measured the resistance and impedance. Glow Discharge Spectrometer (GDS) was used for analyzing the compositions of copper single crystals and commercial copper. Current-Voltage curve, resistance, total harmonic distortion and speaker frequency response were measured for comparing electrical and acoustic properties of two samples.

• Proceedings of the Acoustical Society of Korea Conference
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• spring
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• pp.233-236
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• 2000

The acoustical response of fish depends on size and physical structure na, most important, on the presence or absence of a swimbladder. Acoustic scattering models for swimbladdered fish represent a fish by an ideal pressure-release surface having the size and shape as the swimbladder. Target strength experiments of red seabream (Chrysophrys major) have been conducted using 38 (split-beam), 120 (split-beam) and 200kHz (dual-beam) frequencies. At each start of each experiment, the live fish are placed in the cage at the surface, then the cage is lowed to about $4{\cal}m$ depth where it remains during the measurements. To test the acoustic models, predictions of target strength based on swimbladder morphometries of 10 red seabream offish total length from $103{\cal}mm{\;}to{\;}349{\cal}mm$ ($3 <$TL/\lambda$ < 45)are compared with conventional target strength measurements on the same, shock-frozen immediately after caged experiments. X-ray was projected along dorsal aspect to know the morphological construction of swimbladder. and fish body. At high frequencies, Helmholtz-kirchhoff(HK) approximation would greatly enhance swimbladdered fish modeling. Sound scattering model [HK-ray approximation model] for comparison to experimental target strength data was used to model backscatter measurements from individual fish. The scattering data can be used in the inverse method along with multiple frequency sonar systems to investigate the adequacy of classification and identification of fish

• Journal of Physiology & Pathology in Korean Medicine
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• v.32 no.4
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• pp.291-297
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• 2018

The purpose of pilot clinical trial is to evaluate the efiicacy and safety of Needle-Embedding acupuncture therapy on TEWL(Transepidermal Water Loss) and Skin hydration. A total of 24 human who visited Dongshin Oriental Medical Center from December 1st, 2016 to July 31st, 2017 were included in the pilot clinical trial. Needle-Embedding acupuncture therapy performed at Gokji(LI11). We observed change of TEWL(Transepidermal Water Loss), Skin hydration before and after Needle-Embedding acupuncture therapy. In the primary endpoint, index of TEWL showed a statistically insignificant decline ($8.5{\pm}2.12{\rightarrow}7.8{\pm}1.53g/h/m^2$). Index of skin hydration showed a statistically significant result ($38.2{\pm}6.77{\rightarrow}36.8{\pm}6.64$). To evaluate the safety, Adverse events and Vital sign check were conducted and there were no problem. And when the physical response, self-awareness, skin system, musculoskeletal pain, and other abnormal responses were assessed 60 minutes and 24 hours and 7 days after Needle-Embedding acupuncture therapy at Gokji(LI11) for stability assessment, Adverse events disappeared during a pilot clinical trial. According to the above pilot clinical trial, it is suggested Needle-Embedding acupuncture therapy were effective for Skin moisturizing and safe.

• Proceedings of the KSPS conference
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• 1997.07a
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• pp.257-257
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• 1997

우리 나라에서 초등영어 교육이 실시되는 연령층이 언어습득 분야에 있어 그렇게 일찍 언어학습을 시작하는 것이 학습효율성의 측면 또는 언어숙달도 측면에서 과연 이로운지에 관해서는 학자들간에 아직도 논쟁의 여지가 많다. 피아제의 인지발달론에 의하면, 의식적 조작이 잘 이루어지지 않는 분야가 바로 발 음분야이기 때문에, 따라서 의식적 조작이 이루어지는 '형식적 조작기'이전인 10-11세 정도에서부터 음성언어 중심의 외국어 교육을 실시하는 것이 바람직하다고 본다. 따라서 듣기와 말하기의 기능에 주안점을 둔 초등영어 교육은 감각과 놀이, 게임, 노래나 챈트 둥으로 흥미를 지속시키면서, 영어의 특질인 강세박자리듬언어(stress-timed rhythm language)의 특성올 초창기부터 듣기 및 말하기 훈련으로 지속적으로 연습시킬 필요가 있다고 본다. 또한 James Asher가 창안한 교수법인 천신반용볍(Total Physical Response)도 초기에 말하기에 대한 부담감 없이 흥미 있는 활동을 통하여 학습동기를 높여줄 수 있는 장점을 지니고 었다. 뿐만 아니라, 청취단계에 있어서 초기에는 귀로들은 외국어를 무조건 기억하지 않고 즉각적인 인지로 끌어내어, 점차 이와 같은 인지훈련을 반복함으로써 결국에는 기억에까지 도달하려 하는 초기학습에 중한 역할을 차지하는 학습법이다. 음성학적인 측면에서 초동영어 교육의 시작단계인 3학년에서는 특히 분절음소 차원에서 영어의 자,모음이 우리말의 자,모음과는 다르다는 차이점을 배우게 되고, 초분절 음소 중에서는 강세와 리듬의 차이를 자연스럽게 습득할 수 있도록 정확한 발음을 들려주어 정확한 발음을 해 낼 수 있도록 훈련하는 것이 중요하다고 하겠다. 하지만, 한편으로는 제6차 교육과정의 영어교육 목표가 언어의 '정확성'보다는 '유창성' 에 그 목표를 두고 있는 점을 감안한다면, 시작단계부터 반드시 정확한 발음을 지녀야 하는 가의 문제도 생각해 볼 필요가 있다. 경우에 따라서는, 정확한 발음은 그 언어에 대한 숙련도가 점차 높아짐에 따라 이와 병행하여 이루어지는 경우도 흔히 경험하는 일이기 때문이다. 결국 초등영어 교육과정에도 명시되어 있듯이 '...영어에 대한 친숙함과 자신감을 심어주고, 영어에 대한 흥미와 관심을 지속적으로 유지시키는 것이 중요하기' 때문에 무엇보다 중요한 측면은 흥미와 관심을 유지시키는 지적인 학습활동보다는 정의적인 학습활동의 전개가 필요하다고 하겠다.

• Journal of Physiology & Pathology in Korean Medicine
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• v.28 no.4
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• pp.452-459
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• 2014

The purpose of this study was to examine the correlation between general health condition and biopsychological traits of Sasang typology which determines the disease susceptibility and treatment responses. We had Korean Constitutional Multicenter Bank (KCMB) listed 1156 participants for measuring Sasang Personality Questionnaire (SPQ) and Body Mass Index (BMI) for biopsychological traits of each Sasang types as well as Short Form 12 (SF12) for general health status. All the analysis was performed with consideration of gender and age. We analyzed the differences in general health status between Sasang types and the correlation between general health status and biopsychological traits of Sasang typology. We also analyzed how much the selected SF12 subscales can be explained with biopsychosocial characteristics. There were no generaliszable differences among Sasang type groups in SF12, no significant correlation between biopsychological traits and SF12 Physical and Mental Component Summary. We found that there were significant correlations between SPQ-Behavior subscale and SF12 Vitality, and the regression model with SPQ-Behavior, SPQ-Emotionality, age and sex can predict 15.4% of the total variances in SF12 Vitality. We discussed the possibility that the Sasang typology is not a determinant of general health status but a moderator for the susceptibility and response. This study would contribute to the development of Sasang type-specific life nurturing program focusing on the psychological perspectives.

• Archives of Plastic Surgery
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• v.37 no.3
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• pp.281-284
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• 2010

Purpose: Pseudohypoparathyroidism is a hereditary disorder characterized by symptoms and signs of hypoparathyroidism, typically in association with distinctive skeletal and developmental defects. Hypoparathyroidism is caused by a insufficient end-organ response to PTH (parathyroid hormone). Hypoparathyroidism consists of four types in which the most common form, pseudohypoparathyroidism-Ia, accompany with Albright's hereditary osteodystrophy. We experienced a case of a woman who had been suffering from calcified mass on left foot, diagnosed Albright's hereditary osteodystrophy. Methods: We present a case of a 24-year-old Korean female who visited plastic surgery department with a painful mass on dorsum of the left foot. On the physical exam, bony hard and painful mass, fixed to dermis, was noted. Plain X-ray films demonstrate suspicious calcification on subcutaneous tissue of dorsum of the left foot. The patient was diagnosed pseudohypoparathyroidism 2 years ago at the plastic surgery department. At the visiting time, the laboratory results were within normal range even though the patient actually had a disease. The reason is because the patient has been treated with Vit.D, calcium replacement therapy and thyroid hormone therapy. Moreover, the patient has been treated with anticonvulsant agents due to epilepsy. On the brain computer tomography (CT), calcification was noted on the basal ganglia and dentate nucleus. So we decided the total excision of entire mass from the left foot. Results: We excised main mass with numerous pinhead sized masses which were scattered around the main mass. The $6.0{\times}4.0{\times}0.5\;cm$ sized main mass was bony hard, and its surface was flat and margin was irregular. The permanent biopsy was confirmed that the main mass and all the scattered tiny masses were heterotopic calcification. The patient did not suffer from the pain after the mass excision. The wound has been healed without any problem. Conclusions: Heterotrophic calcification is often accompanied with pseudohypoparathyroidism, but such a huge one is uncommon. We report a case of pseudohypoparathyroidism with heterotrophic calcification developed in dorsum of left foot who was diagnosed by excisional biopsy.