• 천문학논총
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• 제15권spc2호
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• pp.21-25
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• 2000

The ionosphere, the atmosphere of the earth ionized by solar radiations, has been strongly varied with solar activity. The ionosphere varies with the solar cycle, the seasons, the latitudes and during any given day. Radio wave propagation through or in the ionosphere is affected by ionospheric condition so that one needs to consider its effects on operating communication systems normally. For examples, sporadic E may form at any time. It occurs at altitudes between 90 to 140 km (in the E region), and may be spread over a large area or be confined to a small region. Sometimes the sporadic E layer works as a mirror so that the communication signal does not reach the receiver. And radiation from the Sun during large solar flares causes increased ionization in the D region which results in greater absorption of HF radio waves. This phenomenon is called short wave fade-outs. If the flare is large enough, the whole of the HF spectrum can be rendered unusable for a period of time. Due to events on the Sun, sometimes the Earth's magnetic field becomes disturbed. The geomagnetic field and the ionosphere are linked in complex ways and a disturbance in the geomagnetic field can often cause a disturbance in the F region of the ionosphere. An enhancement will not usually concern the HF communicator, but the depression may cause frequencies normally used for communication to be too high with the result that the wave penetrates the ionosphere. Ionospheric storms can occur throughout the solar cycle and are related to coronal mass ejections (CMEs) and coronal holes on the Sun. Except the above mentioned phenomena, there are a lot of things to affect the radio communication. Nowadays, radio technique for probing the terrestrial ionosphere has a tendency to use satellite system such as GPS. To get more accurate information about the variation of the ionospheric electron density, a TEC measurement system is necessary so RRL will operate the system in the near future.

• 천문학회보
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• 제38권2호
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• pp.98-98
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• 2013

태양의 활동영역에서 관측할 수 있는 흑점은 주로 흑점군으로 관측되며, 태양폭발현상의 발생을 예보하기 위한 중요한 관측 대상 중 하나이다. 현재 태양 폭발을 예보하는 모델들은 McIntosh 흑점군 분류법을 사용하며 통계적 모델과 기계학습 모델로 나누어진다. 컴퓨터는 흑점군의 형태학적 특성을 연속적인 값으로 계산하지만 흑점군의 형태적 다양성으로 인해 McIntosh 분류법과 일치하지 않는 경우가 있다. 이러한 이유로 컴퓨터가 계산한 흑점군의 형태학적인 특성을 예보에 직접 적용하는 것이 필요하다. 우리는 흑점군을 검출하기 위해 최소신장트리(Minimum spanning tree : MST)를 이용한 계층적 군집화 기법을 수행하였다. 그래프(Graph)이론에서 최소신장트리는 정점(Vertex)과 간선(Edge)으로 구성된 간선의 가중치의 합이 최소인 트리이다. 우리는 모든 흑점을 정점, 그들의 연결을 간선으로 적용하여 최소신장트리를 작성하였다. 또한 최소신장트리를 활용한 계층적 군집화기법은 초기값에 따른 군집화 결과의 차이가 없기 때문에 흑점군 검출에 있어서 가장 적합한 알고리즘이다. 이를 통해 흑점군의 기본적인 형태학적인 특성(개수, 면적, 면적비 등)을 계산하고 최소신장트리를 통해 가장 면적이 큰 흑점을 중심으로 트리의 깊이(Depth)와 차수(Degree)를 계산하였다. 이 방법을 2003년 SOHO/MDI의 태양 가시광 영상에 적용하여 구한 흑점군의 내부 흑점수와 면적은 NOAA에서 산출한 값들과 각각 90%, 99%의 좋은 상관관계를 가졌다. 우리는 이 연구를 통해 흑점군의 형태학적인 특성과 더불어 예보에 직접적으로 활용할 수 있는 방법을 논의하고자 한다.

• 한국의류산업학회지
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• 제12권6호
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• pp.774-780
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• 2010

The purpose of this study was to better assess and understand current needs and wearing sensation, including clothing behavior for early elderly women in the Korea and USA. The subjects in this study were 135 and 173 early elderly women in the Korea and USA. This research was done by a survey method and chi-square test. The major objectives of this study were as follows; First, it was found that the early elderly women of Korea utilize mostly human information as information source when purchasing clothing, whereas those of USA mostly media information. The women of Korea were found to put most emphasis in esthetic aspects of clothing, whereas those of USA in comfort. The most frequently worn clothes by the early elderly women of Korea were jumper, T-shirt and slacks, whereas jacket, sweater and slacks by those of USA. As for skirt, flare skirt was highly preferred in Korea, whereas A-line skirt in USA. Second, regarding the wearing sensation of ready-made clothing, the wearing sensation of jacket was found to be worst on the shoulder in Korea, whereas on the waist in USA. And the early elderly women of both Korea and USA had poor wearing sensations due to the length of sleeve, of trouser, of skirt and of one-piece dress. The comparison of the clothing behavior and wearing sensation of the early elderly women between Korea and USA showed a greater difference in clothing behavior than in wearing sensation.

• 한국의상디자인학회지
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• 제13권4호
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• pp.29-39
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• 2011

The purpose of this study provides a high consumer-oriented wedding dress on the consumer and offering the consumer-oriented product and provide a basis data to develop a wedding shops so it can stable and manage of effective marketing. Wedding shop for a survey of consumer preference, and based on this wedding dress designed and made. The results are summarized as follows. First, when wearing wedding dresses and "graceful and feminine" image that seek to pursue an image that showed the highest response, "simple and stylish", "cute and vivid" image was in order. In the survey of wedding dress preference, lace is preferred, in tone of color white is preferred by and large. In silhouette, A-line is preferred most, in neckline, exposure of the shoulder, in sleeve length, sleeveless, in decoration, beads. Second, on the basis of these results, depending on the image to pursue the design, wedding was made of 3 creations. The work I is a target of the early 20s, the concept "simple and stylish", and A-line is adopted in silhouette focusing on modern simplicity, soft satin material used of high class. The work II is a target of the late 20s, the concept "cut and vivid", and fit-and-flare made of many folded tulle mesh material. The work ill is a target of the 30s overall, the concept "graceful and feminine", and high-waist- empire-line is adopted in silhouette, splendid lace material used, is of the gorgeous and mature beauty.

• 한국산학기술학회논문지
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• 제10권2호
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• pp.303-312
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• 2009

본 논문에서는 UWB 통신용 CPW 급전 디스크 섹터 안테나를 설계하고 제작한다. 또한 디스크 섹터 안테나의 부채꼴에 사각형 슬릿을 삽입하여 E-평면에서 방향성을 갖도록 하였다. 안테나의 입력 임피던스는 안테나를 구성하는 파라미터인 디스크 섹터의 반경, 디스크 섹터의 중심각, 접지면의 길이와 급전선 부근의 접지면 모서리의 길이를 변화시켜서 $50{\Omega}$을 갖는 급전선과 정합시켰다. 설계된 UWB 통신용 안테나의 크기는 $72mm{\times}26mm$이고, 시뮬레이션을 통한 안테나의 대역폭은 $3{\sim}13GHz$이다. 측정결과로부터 대역폭은 $1.98{\sim}11GHz$이고 제작된 안테나의 반사손실과 이득은 3.5GHz에서 -50.88dB, 1.34dBi, 5.5GHz에서 -12.27dB, 3.35dBi, 8GHz에서 -23.2dB, 3.8dBi이고 10GHz에서 -16.17dB, 5.2dBi를 갖는다.

• 대한예방한의학회지
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• 제17권2호
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• pp.105-127
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• 2013

Objectives : We examined the use of the moxibustion through survey on Korean Medicine Doctors (KMDs) on preparation of universal moxa product standard by fully reflecting opinions of practitioners and the industry. Methods : The questionnaire is composed of 25 questions including use of indirect moxa, side effects, complaints and improvements, general characteristics and so on, and were responded by 1,588 KMDs. For statistics, frequency analysis, chi-square analysis, T-test and ANOVA were conducted using SPSS 12.0 for windows, and the significance level was 0.05. Results : In this research, 91% of the responded KMDs was using moxibustion, and the proportion of using mediate moxibustion was shown as 63.2%. They used mediate moxibustion for side effects of direct moxa method such as risk of burn, ease of use, control of stimulation and so on. And it was mostly being conducted to women and 40 ages. Most respondents gave moxibustion treatments for the purpose of thermal stimulation on acupoint to musculoskeletal diseases. Most respondents were treating 1~2 pieces of moxibustion to patients by moxibustion points to those of 1~2 regions every time within 10 minutes. Regarding the frequency of side effects of mediate moxibustion, within 3% of respondents had experienced side effects, and the types were burn, flare and itchiness, odor and smoke. The dissatisfaction of mediate moxibustion products was moderate(2.00 out of 5 point scale), and went up public health doctors, the younger ages and the shorter clinical experience. Complaints on mediate moxibustion products were serious odor, poor attachment, risk of burn etc. Regarding ways to improve mediate moxibustion, the expansion of moxibustion's insurance cost carne out highest, followed by preparation of manual on efficacy, strengthening of training, acquiring evidence on efficacy, diversification of specifications, safety improvement, quality improvement of mediate moxibustion products. Conclusions: Many KMDs use for ease of use and give moxibustion treatments for thermal stimulation but they complain about safety, efficacy and quality of mediate moxibustion. After this it is considered that we have to elevate therapeutic effect through the improvement of mediate moxibustion products.

• 대한한의학원전학회지
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• 제19권3호
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• pp.365-380
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• 2006

All of the disease which was referred in ${\ulcorner}$Diagnosis and Treatment of the Woonded, Carbuncle, intestinal infection and acute eczema in Synopsis of Golden Chamber${\lrcorner}$ are belong to surgery. Woonded in this chapter, specially, come under in case occur by metal, and spoke that this thing is metal wounded(金瘡). I am considered by something to use Wangbulryuhaengsan(王不留行散) in wound that is not festered, Baenongtang(排膿湯) and Baenongsan(排膿散) in wound that is festered. Carbuncle is one of Venus festering nature file that happen in skin and muscle because blood does not circulate with flag and part's flare, calorification, pain, puffiness are characteristic. Carbuncle is agreed with concept of inflammation of modern medicine. When treat carbuncle, without using surgery medical treatment, used together internal medicine surgery medical treatment. Intestines carbuncle(腸癰) is come in inflammation in abdominal cavity as kind of inflammation, partiality peritoneum festering disease round present cecum as one of inside carbuncle. I think, when treat intestines carbuncle, in case cold and moisture become stasis and heat is less, Uiibujapaedoksan(薏苡附子敗毒散) can be used. Independently of festering, Daehwangmokdantang(大黃收丹湯) can be used in case heat and extravasated blood become stasis. Saliva ulcer on the vulva is comes in impetigo In Case of young child, and is come in Venus eczema in case is general. Prognosis of saliva ulcer on the vulva widespread thing can treat by arm, leg at Lips region, but it does not treat to grow at Lips region from limb, and treatment uses Hwangryunbun(黃連粉)

• The Korean Journal of Pain
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• 제27권1호
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• pp.54-62
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• 2014

Background: The recently known analgesic action mechanisms of nefopam (NFP) are similar to those of anticonvulsants and antidepressants in neuropathic pain treatment. It is difficult to prescribe high doses of oral neuropathic drugs without titration due to adverse effects. Unfortunately, there are few available intravenous analgesics for the immediate management of acute flare-ups of the chronic neuropathic pain. The aim of this study was to determine the additional analgesic effects for neuropathic pain of NFP and its adverse effects during the titration of oral medications for neuropathic pain among inpatients with postherpetic neuralgia (PHN). Methods: Eighty inpatients with PHN were randomly divided into either the NFP or normal saline (NS) groups. Each patient received a 3-day intravenous continuous infusion of either NFP with a consecutive dose reduction of 60, 40, and 20 mg/d, or NS simultaneously while dose titrations of oral medications for neuropathic pain gradually increased every 3 days. The efficacy of additional NFP was evaluated by using the neuropathic pain symptom inventory (NPSI) score for 12 days. Adverse effects were also recorded. Results: The median NPSI score was significantly lower in the NFP group from days 1 to 6 of hospitalization. The representative alleviating symptoms of pain after using NFP were both spontaneous and evoked neuropathic pain. Reported common adverse effects were nausea, dizziness, and somnolence, in order of frequency. Conclusions: An intravenous continuous infusion of NFP reduces spontaneous and evoked neuropathic pain with tolerable adverse effects during the titration of oral medications in inpatients with PHN.

• 환경위생공학
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• 제15권2호
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• pp.95-101
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• 2000

산업의 고도화에 따른 경제성장으로 인류의 삶의 질은 많이 좋아졌지만 경제활동으로 인한 각종 환경 오염물질은 상대적으로 많이 배축된 것이 사실이다. 특히 대기오염물질의 주 요인이 되고있는 질소산화물과 아황산가스 등 많은 오염물질이 있지만 최근 더욱더 문제가 되고있는 것이 휘발성 유기화합물질로써 대기중의 탄화수소 화합물의 총칭으로 광 화학 옥시던터와 오존 등으로 인한 대기오염으로 인체에 미치는 영향이 아주 심각하며, 발생장소도 대규모 석유화학 장치산업의 원유를 정제하는 정제공정에서부터 저유소 및 중간 제품공정, 그리고 소비자가 직접 접하는 전국각지에 산재되어 있는 주유소 등에서 많은 량의 휘발성 유기화합물질이 발생되고 있다. 이에 대한 대책으로 정부차원에서 우선 대규모 석유화학단지를 휘발성 유기화합물질 배출저감을 위한 종합대책지역으로, 전남 여천지역은 1996. 9. 20일, 울산지역은 1997. 7. 1일에 지정고시 하였다. 울산지역의 경우 당초 대상물질이 47개 항목에서 시행초기에 보완적인 차원에서 크실렌 및 초산 등 일부물질이 수정된 31개 항목으로 변경고시 되었으며, 이에 대해 사업장에서는 해당물질에 따른 처리시설을 설치 가동 중에 있다. 그러나 휘발성 유기화합물질의 발생조건과 발생량, 각 물질의 혼합시 안전성문제 등이 공정조건상 일정하지 않아 방지시설 선정설치에 많은 에로사항이 있었다. 기존의 시설에 방지시설을 추가한다는 것은 화학공장 특성상 여러 가지 조건이 있으며, 그 동안 많은 시행착오를 하면서 설치하였다. 그러나 일부시설은 아직도 완벽한 방지효과를 얻기에는 부족하므로 향후 계속적인 기술 및 설비투자와 관리대책이 보완되어야 할 것으로 사료된다.

• 천문학회지
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• 제42권1호
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• pp.1-7
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• 2009

The e-CALLISTO is a global network of frequency-agile solar radio spectrometers that was constructed in a collaboration between Swiss Federal Institute of Technology Zurich (ETH Zurich) and local host institutes. It is intended to monitor solar radio bursts 24 hours a day in frequency range between 45 MHz and 870 MHz. One of e-CALLISTO spectrometer was installed at Korea Astronomy and Space Science Institute (KASI) in 2007 October. The spectrometer gets signals from a horizontally polarized log-periodic antenna mounted on an automatic Sun-tracking system. Tracking status and data are monitored in Space Weather Monitoring Laboratory (SWML) of KASI in real time, and flare time data are transferred to ETH Zurich data archive daily. Using this spectrometer we obtained a couple of type II solar radio bursts on 2007 December 31, and found that these bursts are associated with a CME which occurred on the east limb.