• Journal of Biosystems Engineering
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• 제26권2호
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• pp.147-154
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• 2001

In Korea and Japan, dried oak mushrooms are classified into 12 to 16 different categories based on its external visual quality. And grading used to be done manually by the human expert and is limited to the randomly sampled oak mushrooms. Visual features of dried oak mushrooms dominate its quality and are distributed over both sides of the gill and the cap. The 2nd prototype computer vision based automatic grading and sorting system for dried oak mushrooms was developed based on the 1st prototype. Sorting function was improved and overall system for grading was simplified to one stage grading instead of two stage grading by inspecting both front and back sides of mushrooms. Neuro-net based side(gill or cap) recognition algorithm of the fed mushroom was adopted. Grading was performed with both images of gill and cap using neural network. A real time simultaneous discharge algorithm, which is good for objects randomly fed individually and for multi-objects located along a series of discharge buckets, was developed and implemented to the controller and the performance was verified. Two hundreds samples chosen from 10 samples per 20 grade categories were used to verify the performance of each unit such as feeding, reversing, grading, and discharging unites. Test results showed that success rates of one-line feeding, reversing, grading, and discharging functions were 93%, 95%, 94%, and 99% respectively. The developed prototype revealed successful performance such as the approximate sorting capability of 3,600 mushrooms/hr per each line i.e. average 1sec/mushroom. Considering processing time of approximate 0.2 sec for grading, it was desired to reduce time to reverse a mushroom to acquire the reversed surface image.

• 동의신경정신과학회지
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• 제18권1호
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• pp.37-61
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• 2007

Objective : By examining EEG status in Korean Traditional Medicine (KTM) from the viewpoint of 'form-qi theory(形氣論)', We wish to prepare for the fundamentals of applicability of KTM diagnoses to EEG. In addition, through reinterpretation of existing Western Medicine reports from the viewpoint of KTM, We tried to find out interrelationship between them. Method : In this paper, a methodology applicable to KTM diagnoses of EEG is presented from the EEG features in waveform characteristics, personalized diversity, and cognitive activity reflection. Results : Frequency bands are assigned to corresponding one of the eight trigrams in terms of yin/yang balance, which is analogous with EEG spectrum analysis mostly used in EEG quantification. The amplitude ratio of each EEG for each frequency band gives meaningful index numbers which can be used in EEG data interpretation, and every index number is named after the sixty four hexagrams. These approaches are adopted through both '4-band classification system and '6-band classification system', and applied to pre-existing reported EEG data obtained from normal adults. These analyses show that changes and distribution pattern in the index numbers are observed as a whole on both left-right line and front-back line connecting EEG measurement cephalic electrodes. And differences in distribution pattern of three index numbers deduced from '6-band classification system' are discussed according to constitution. Conclusion : The index numbers introduced here, which are the spectral power ratio for each EEG, are based on KTM yin/yang balance. These index numbers vary according to cephalic location, so its application in terms of traditional meridian theory is strongly expected. The index number distribution also shows different patterns according to constitution.

• 지능정보연구
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• 제10권2호
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• pp.65-77
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• 2004

본 연구에서는 영문 단어로부터 폰트를 분류하기 위해 연역적이고 국부적인 폰트 분류 방법을 제안한다. 이는 문자 인식 전에 한 단어에서 폰트를 분류하는 것을 말한다. 폰트 분류를 위해 활자 특성인 어센더(ascender), 디센더(descender)와 세리프(serif)가 사용된다. 입력 단어로부터 어센더(ascender), 디센더(descender)와 세리프(serif)가 추출되어 경사도 특징 벡터가 추출되고, 그 특징 벡터는 인공 신경망에 의해 입력 단어에 대한 2가지 폰트 스타일, 3가지 폰트 그룹, 7가지 폰트 이름이 분류된다. 제안된 연역적이고 국부적인 폰트 분류 방법은 폰트 정보가 문자 분할기와 문자 인식기에 사용될 수 있게 한다. 나아가, 특정 폰트에 따른 Mono-Font 문자 분할기와 Mono-Font문자 인식기로 구성되는 OCR시스템을 구성할 수 있는 것을 가능하게 한다. 실험 결과는 평균 95.4 퍼센트의 높은 폰트 분류율을 보였다. 본 논문에서 7가지 폰트분류를 위해 제안된 방법은 그 외 다른 폰류 분류에도 적용될 수 있다.

• 한국의상디자인학회지
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• 제16권3호
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• pp.61-73
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• 2014

Urinary Incontinence is any leakage of urine against their will. It is not a life threatening illness but it causes negative effects both socially and psychologically. Based on many previous studies, 20-40% of adult female and 30% of men in their sixties have experienced symptoms of urinary incontinence. As the number of active aged people experiencing the symptoms increases, demand for specialized product is growing. The purpose of the study is to research the types and features of male disposable products for urinary incontinence on the market and to provide the basic data for improvement and development of better product. Products from 6 brands (Tena, Depend, Carnation, Keepers, Molimed, Abrimen) with high brand awareness both in online and offline were selected and analyzed. And product evaluation was carried out by male in their sixties with light symptom of urinary incontinence. The results are as follows. There are three types of male products for urinary incontinence: panties, diaper and pad. Among the 6 brands, the subject of analysis, only Depend from Yuhan Kimberly produces male panties while others make ones for unisex. There is no diaper product only for male, and Tena, Molimed, Abrimen have pad type products for male. Male panties from Depend emphasizes their design considering male's physical characteristics. Male pad is differentiated with female one by having different designs like triangular or pocket type which is more comforting to men. As a result of product evaluation, wearable panties similar to normal underwear were highly appreciated and satisfactory. Among various shapes of pads, 25cm long pad with wide width of front and narrow back was valued to be comfortable.

• Journal of electromagnetic engineering and science
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• 제13권3호
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• pp.178-185
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• 2013

This paper introduces a high-efficiency, high-gain, broadband quasi-Yagi antenna, and its four-element array for use in 60-GHz wireless communications. The antenna was fed by a microstrip-to-slotline transition consisting of a curved microstripline and a circular slot to allow broadband characteristics. A corrugated ground plane was employed as a reflector to improve the gains in the low-frequency region of the operation bandwidth, and consequently, to reduce variation. The single antenna yielded an impedance bandwidth of 49 to 69 GHz for $|S_{11}|$ <-10dB and a gain of >12.0 dBi while the array exhibited a bandwidth of 52 to 68 GHz and a gain greater than 15.0 dBi. Both proposed designs had small gain variations (${\pm}0.5$ dBi) and high radiation efficiency (>95%) in the 60-GHz bands. The features of the proposed antenna were validated by designing, fabricating, and testing a scaled-up configuration of the single antenna at the 15-GHz band. The measurements resulted in an impedance bandwidth of 13.0 to 17.5 GHz for $|S_{11}|$ <-10dB, a gain of 10.1 to 13.2 dBi, and radiation efficiency in excess of 88% within this bandwidth. Additionally, the 15-GHz antenna yielded quite symmetric radiation profiles in both E- and H-planes, with a high front-to-back ratio.

• 한국의류산업학회지
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• 제13권5호
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• pp.759-768
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• 2011

This study is designed to understand current wearing conditions of air force mechanic parkas and evaluate their functionality by examining the wearing conditions and wearers' subjective assessment. By doing so, it also intends to identify issues that require improvements; and to provide basic data for future development of air force mechanic parkas. A survey was conducted as a study methodology, and the collected 1,628 questionnaires were analyzed. Findings of this study are as follows. 1. In the usability assessment, it was found that visibility of body sides was needed to be enhanced since reflective tapes were attached only to the front and back of the body; pockets were too big, but not convenient to keep mechanic tools; the design of hiding hood was not suitable for water-proof clothing; and a new design of size-controllable hood was called for since the hood blocked eye sight. With respect to the fabric, dissatisfaction was identified with durability, cold-proof and fire-proof features. 2. In the mobility assessment, respondents showed low satisfaction with collar heights and neck girths. Mobility score was over moderate level on average, except the parka length that obstructs wearers' movement, and neck and collar size. 3. In the wearability assessment, respondents presented moderate satisfaction with pleasantness, weight, pressure and dampness. However, insulation was found unsatisfactory. Based on the result, this study proposed improvement plans on design, pattern and fabric; and is expected to serve as basic data for developing more effective and functional air force mechanic parkas.

• 복식
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• 제67권1호
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• pp.147-168
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• 2017

This study examines the types and characteristics of women's garments excavated in the early Joseon Dynasty before 1592. The study sorts out headgear, jacket, skirt and trousers, and coats from the historical texts in the early Joseon Dynasty and excavated women's wears in the fifteenth and sixteenth centuries, and analyzes their textiles and patterns. The Joseon women's garments convey several features. They are wide across the chest and square shaped collar with virtually straight sleeves. While their breast-ties are extremely little for the size of clothes, they do not have any inner-tie. They have broad and short dongjeongs which seem to be hard to be adjusted. There are a variety of headgear. Jang-Jeogori slit down in both sides. The Jeogori after the seventeenth century transformed a more practical form of a fitting dress to an individual body in comparison with the sixteenth jeogori. It is identified that the fabrics in the early Joseon period were woven more diversely and colorfully than the late Joseon period. Most of the excavated fabrics in the sixteenth century were in silk. Materials for adornments before 1592 were not much diverse and their designs mostly contained patterns of lotus flowers, patterns of cloud and treasures with oblique lines. The colors are mainly brown, navy and green. The Joseon women's clothes were comprised of skirts with folded hem, coat with round collars, wide leg pants, Jangot, long-sleeved coat with folding collars, and quadrangular pieces of cloth in various sizes, or mu and so forth. Joseon women's clothes, like men's wears, partake of active functions in their headgears, wide leg pants, styles in short front and long back, and coat with round collars.

• Journal of electromagnetic engineering and science
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• 제18권2호
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• pp.117-128
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• 2018

In this paper, compact linear dual polarized series-fed $1{\times}2$ linear and $2{\times}2$ planar arrays antennas for airborne SAR applications are proposed. The proposed antenna design consists of a square radiating patch that is placed on top of the substrate, a quarter wave transformer and $50-{\Omega}$ matched transformer. Matching between a radiating patch and the $50-{\Omega}$ microstrip line is accomplished through a direct coupled-feed technique with the help of an impedance inverter (${\lambda}/4$ impedance transformer) placed at both horizontal and vertical planes, in the case of the $2{\times}2$ planar array. The overall size for the prototype-1 and prototype-2 fabricated antennas are $1.9305{\times}0.9652{\times}0.05106{{\lambda}_0}^3$ and $1.9305{\times}1.9305{\times}0.05106{{\lambda}_0}^3$, respectively. The fabricated structure has been tested, and the experimental results are similar to the simulated ones. The CST MWS simulated and vector network analyzer measured reflection coefficient ($S_{11}$) results were compared, and they indicate that the proposed antenna prototype-1 yields the impedance bandwidth >140 MHz (9.56-9.72 GHz) defined by $S_{11}$<-10 dB with 1.43%, and $S_{21}$<-25 dB in the case of prototype-2 (9.58-9.74 GHz, $S_{11}$< -10 dB) >140 MHz for all the individual ports. The surface currents and the E- and H-field distributions were studied for a better understanding of the polarization mechanism. The measured results of the proposed dual polarized antenna were in accordance with the simulated analysis and showed good performance of the S-parameters and radiation patterns (co-pol and cross-pol), gain, efficiency, front-to-back ratio, half-power beam width) at the resonant frequency. With these features and its compact size, the proposed antenna will be suitable for X-band airborne synthetic aperture radar applications.

• 미술자료
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• 제98권
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• pp.54-77
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• 2020

희랑대사상은 고려시대에 제작된 상으로 높이 82.4cm, 무릎폭 66.6cm, 앞뒤 최대폭 44cm에 이르는 등신상에 가까운 크기이다. 제작 기법은 승상의 앞면과 뒷면을 건칠과 나무를 접합하여 만든 것으로 동아시아의 유일한 사례로 주목된다. 유사한 기술이 나말여초의 작품으로 추정되는 봉화 청량사 건칠약사여래좌상에 이미 적용된 바 있어 이 시기의 특징으로 이해된다. 희랑대사상에 대해서는 18세기에 쓰여진 가야산을 여행하면서 쓴 기행문에 구체적으로 기술되어 있다. 즉 승상의 가슴에 있는 구멍과 힘줄과 뼈가 울퉁불퉁하다는 등의 독특한 특징은 현재의 희랑대사상과 정확하게 부합된다. 가슴에 있는 구멍은 신통력의 상징으로 3~4세기에 활동한 서역의 승려 불도징(佛圖澄)의 가슴에도 있었다고 한다. 또한 당시에는 흑칠 상태였으며, 19세기에 현재와 같이 채색되었음도 알 수 있다. 봉안 전각은 해인사의 해행당(解行堂)과 진상전(眞常殿)이었으며, 이후 조사전과 보장전을 거치면서 현재에 이른다. 우리나라에서 승상의 제작과 봉안은 삼국시대부터 있었던 것으로 문헌 기록에 등장하지만 현존하는 작품은 매우 드문 편이다. 현재 우리나라에 남아있는 승상의 초상조각은 고려시대의 희랑대사상을 비롯하여 조선시대에 제작된 나옹과 의상대사상 등 모두 네 구뿐이다. 이 가운데 희랑대사상은 고려 초기 10세기경에 제작된 상으로서 최고의 제작 기술과 사실적인 재현 그리고 내면의 인품까지 표현한 점에서 예술적 가치가 뛰어난 작품이다. 승상을 제작하여 숭배하고 신성시하는 전통은 한국만이 아니라 중국, 일본 등 동아시아에서 크게 유행하였다. 다만 재료와 제작 기술에 대해서는 나라마다 차이와 특이성을 보이며 발전하였다. 중국은 육신불(肉身佛)이 많은 편이며 일본은 건칠, 나무, 흙 등 시대마다 다양한 재료를 이용하여 많은 승상을 제작하였다. 저마다 다른 재료와 기법을 사용했지만 동아시아 각국의 승상 제작은 승려의 참모습과 정신성의 성공적 표현을 추구하였다는 점에서는 다르지 않다.

• 한국지역지리학회지
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• 제7권4호
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• pp.65-80
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• 2001

본 연구는 팔공산의 지형적인 특성을 반영하는 동화사(桐華寺)의 입지와 가람배치의 풍수지리적 특성을 밝히는 것이다. 동화사의 풍수지리적인 특성에 대한 해석과 연구는 향후 동화사의 토지이용이나 건물의 증 개축, 진입로의 개설, 가람의 변경 유지 등에 참고할 수 있는 기초적 자료를 제공할 것으로 생각된다. 동화사는 산과 물이 에워싸인 지세로 풍수지리적인 조건을 잘 갖추고 있는 곳으로 종교적 장소성을 확보하기에 용이한 조건을 갖추었다. 봉황과 관련된 안온한 지세와 어울리게 가람이 배치되었으며, 봉황을 상징하는 시설물들이 누각과 문, 비에 남아있고, 대나무와 오동나무가 많이 식재(植栽)되어 있다. 동화사의 중심공간이 잘 부각되고, 사찰의 경역(境域)을 청정하게 유지하기 위해 주 진입로의 복원, 주차장의 폐쇄, 새로운 진입로의 개설 등과 같은 방안을 제안하였다.