• 제목/요약/키워드: perfect ring

검색결과 47건 처리시간 0.023초

수배부의 신전건에 대한 해부학적 연구 (An Anatomic Study of the Extensor Tendons of the Human Hand)

  • 강문석;정성균;남승민;신호성;김용배
    • Archives of Plastic Surgery
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    • 제38권6호
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    • pp.836-844
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    • 2011
  • Purpose: Hands are the chief organs for physically manipulating the environment, using anywhere from the roughest motor skills to the finest, and since the fingertips contain some of the densest areas of nerve endings on the human body, they are continuously used organ with complex functions, and therefore, often gets injured. To prevent any functional loss, a detailed anatomical knowledge is required to have a perfect surgical treatment. Also it is necessary to have a thorough understanding of arrangements of the human extensor tendons and intertendinous connections when tenoplasty or tendon transfer is required. We performed a study of the arrangements of the human extensor tendons and the configuration of the intertendinous connections over the dorsum of the wrist and hand. Methods: A total of 58 hands from Korean cadavers were dissected. The arrangements of extensor indicis proprius, extensor digitorum communis, and extensor digiti minimi tendons and intertendinous connections were studied. Results: The most common distribution patterns of the extensor tendons of the fingers were as follows: a single extensor indicis proprius (EIP) tendon which inserted ulnar to the extensor digitorum-index (EDC-index); a single EDC-index; a single EDC-middle; a double EDC-ring; an absent EDC-little; a double extensor digiti minimi (EDM), a single EDC-index (98.3%), a single EDC-middle (62%), a double EDC-ring (50%), and an absent (65.5%) or a single (32.8%) EDC-little. A double (70.6%) EDM tendons were seen. Intertendinous connections were classified into 3 types: type 1 with thin filamentous type, type 2 with a thick filamentous type, and type 3 with a tendinous type subdivided to r shaped 3r type and y shaped 3y type. The most common patterns were type 1 in the 2nd intermetacarpal space, type 2 in the 3rd intermetacarpal space, and type 3r in the 4th intermetacarpal space. And in the present study, we observed one case of the extensor digitorum brevis manus (EDBM) on the boht side. Conclusion: A knowledge of both the usual and possible variations of the extensor tendon and the intertendinous connection is useful in the identification and repair of these structures.

개선된 전력 분배율을 갖는 태극형 방향성 결합기에 관한 연구 (A Study on the Taegeuk Shaped Directional Coupler with Improved Power Split Ratio)

  • 양규식;오양현;이종악
    • 한국전자파학회지:전자파기술
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    • 제2권2호
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    • pp.19-24
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    • 1991
  • 본 논문에서는 태극 모양의 새로운 방향성 결합기를 고안하여 높은 전력 분배율을 실현할 수 있음을 실험을 통하여 입증하였다. 제안돈 태극형 방향성 결합기는 하이브리드 링형 방향성 결합기의 $3\lambda/4$부분을 적극적으로 활용하기 위하여 태극 모양의 구조를 취했으며, 우수 기수 모드 해석법을 이용하여 완전정합과 분리 조건을 만족하는 각 지로의 어드미턴스를 구하였다. 그 결과 마이크로 스트립 라인으로 제작 가능한 저항의 범의 내에서 이미 발표된 연구 결과에서와 같은 크기의 회로 면적내에서도 훨씬 높은 전력 분배율(최대 28DB)을 실현할 수 잇음을 알았으며, CGP-502기판을 이용하영 중심 주파수 10GHz에서 0,8,16dB 전력 분배율을 갖는 태극형 방향성 결합기를 설계 제작하고 실험을 하여 이론의 타당성을 확인하였다.

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링 운동 차오르며 Swallow 동작 처치 전.후의 기술분석 (Longitudinal Kinematical Analysis of Kip to Swallow Motion in Rings)

  • 백진호;박종훈;이용식
    • 한국운동역학회지
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    • 제16권3호
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    • pp.173-181
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    • 2006
  • The purpose of this study is grasp the problem of the gymnast, Kim, Dong-Hwa's Kip to Swallow Motion in Rings, and make up for the weak points to help him to perform a better performance. Therefore, two tryouts for $28^{th}$ Athens Olympic Games were filmed using video camera then finalized with Kinematical Analysis using 3D motion analysis program followings are the form of conclusions. 1. In the very first tryout, when he was doing a Swallow Support Scale, his CM position was high and arm slope was deduction because when he was doing Kip, the ascent velocity was low and he tried excessively to pull him on rings due to relying upon angular movement of shoulder joint. 2. When he was doing drop, he let his hip angle bend only little bit and let fall so making shoulder angle wider and maintain the level horizontally occurs strong drop motion when vertical descent is happening. 3. As a result, lowering the direction of a kick makes CM's movement path lower, increase vertical ascent velocity, and it helps to do the Swallow Support motion in short period of time. 4. After a strong drop motion, which is deep and fast, would make rope of ring shake so there is a defect that the body moves to forward area. However, it does not effect in Swallow Support Scale motion. 5. In the second tryout, trunk rotation angle and arm slope was fixed decrease while doing rotary motion. When rotary motion was happening, before the body was going under the rings, maintained his arm slope horizontally so his Swallow Support Scale motion was nearly perfect.

The investigation of a new fast timing system based on DRS4 waveform sampling system

  • Zhang, Xiuling;Du, Chengming;Chen, Jinda;Yang, Herun;kong, Jie;Yang, Haibo;Ma, Peng;Shi, Guozhu;Duan, limin;Hu, Zhengguo
    • Nuclear Engineering and Technology
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    • 제51권2호
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    • pp.432-438
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    • 2019
  • In the study of nuclear structure, the fast timing technique can be used to measure the lifetime of excited states. In the paper, we have developed a new fast timing system, which is made up of two $LaBr_3:Ce$ detectors and a set of waveform sampling system. The sampling system based on domino ring sampler version 4 chip (DRS4) can digitize and store the waveform information of detector signal, with a smaller volume and higher timing accuracy, and the waveform data are performed by means of digital waveform analysis methods. The coincidence time resolution of the fast timing system for two annihilation 511 keV ${\gamma}$ photon is 200ps (FWHM), the energy resolution is 3.5%@511 keV, and the energy linear response in the large dynamic range is perfect. Meanwhile, to verify the fast timing performance of the system, the $^{152}Gd-2_1^+$ state form ${\beta}^+$ decay of $^{152}Eu$ source is measured. The measured lifetime is $45.3({\pm}5.0)ps$, very close to the value of the National Nuclear Data Center (NNDC: $46.2({\pm}3.9)ps$). The experimental results indicate that the fast timing system is capable of measuring the lifetime of dozens of ps. Therefore, the system can be widely used in the research of the fast timing technology.

부가중합형 실리콘 교합인기재의 탄성 특성 (Elastic properties of addition silicone interocclusal recording materials)

  • 이영옥;김경남
    • 한국치위생학회지
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    • 제12권3호
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    • pp.513-520
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    • 2012
  • Objectives : In this study, contact angle and shore D hardness were measured, and a shark fin test was conducted after selecting five addition silicon(Blu-Mousse, BM; EXABITE II, EX; PERFECT, PF; Regisil$^{(R)}$ Rigid, RE; Silagum$^{(R)}$, SI) in order to figure out the properties of elastomeric interocclusal recording materials and reduce errors at interocclusal recording. 8) Methods : A contact angle was measured using a contact angle analyzer. After placing a drop of liquid on the surface of the specimens of interocclusal recording materials, a contact angle was photographed with a CCD camera on the equipment. In terms of a shark fin test, interocclusal recording materials were mixed for the time proposed by the manufacturer and inserted into the split ring of the Shark fin device. Twenty (20) seconds exactly, a metal rod was removed to make the materials slowly absorbed. Once they hardened, fin height was measured with a caliper after separating molds and trimming the specimens. The shore D hardness was measured with a shore D hardness tester(Model HPDSD, Hans Schmidt & Co. Gmbh, Germany) in sixty (60) minutes after fabricating specimens. In each experiment, five specimens, mean and standard deviation were calculated. A one-way ANOVA test was performed at the p>0.05 level of significance. In terms of correlation among the tests, Pearson correlation coefficient was estimated. For multiple comparison, Scheffe's test was carried out. Results : A contact angle was the highest in EX with $99.23^{\circ}$ (p<0.05) while the result of the shark fin test was the longest in RE with 5.45mm. SI was the lowest (0.27mm) with statistical significance. Among the interocclusal recording materials, significant difference was observed in terms of means (p<0.05). The shore D hardness was the highest in SI with 31.0 while RE was significantly low with 16.4 (p<0.05). Among the materials, statistically significant difference was observed in terms of means when compared to the rest materials (RE), BM, RE and SI (PF and EX) and the remaining materials (BM and SI) (p<0.05). In terms of correlations among the tests, a negative correlation occurred between shore D hardness and shark fin test(r=-0.823, p=0.000). Conclusions : According to the study above, it is necessary to understand the properties of interocclusal recording materials and consider contact angle, shark fin test and properties of shore D hardness to select appropriate materials.

모로코인(人)의 장신구(裝身具)와 화장(化粧)에 관(關)한 연구(硏究) (A Study of the Personal Ornaments and Make-up of Maroccan)

  • 이순홍
    • 패션비즈니스
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    • 제5권2호
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    • pp.15-34
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    • 2001
  • Ornaments are accessories for the decoration of the body or dress. They aren't unavoidably required one, but serve to make one's dress perfect as decorative industrial art objects. In Morocco, ornaments were initially used as a sign of social position or the class or an incantatory symbol. In effect, they were originally employed to adjust one's dress, not just for decoration, and they were of use for household economy. Gold, silver and handcraft available for exchange were a means of increasing one's property and an indication of social standing and wealth. In particular, the dress and jewelry of a bride was a measure of her family's wealth, regarded as a symbol of her chastity and value. The ornaments symbolically back up people's faith in supernatural power, and their real value is based on implicit form or way of decoration, not the external shape. Specifically, there is a tendency to use the form of animal as a protector, not one to frighten people. In the artistic tradition of Morocco, fish pattern stands for water and rain, and eagle and bird are considered to be related to fate. Scorpion and lizard are depicted as an inquirer of sun, and snake is a symbol of abundance and sexual instinct, being viewed to have an ability to cure disease. Turtle pattern is a symbol of saint because it protects one from the evil. The ornaments are made of gold, silver, amber, clam, garnet, glass, nielle, enamel, glaze, coral or tree, and symbolic patterns are used, including hand(a symbol of five numerals), turtle, lizard, scorpion, eye, triangle, bird and eggs. They are very big and diverse, being categorized into ornaments for the head or the chest, neckless, fibula, earring, bracelet and ring. For Moroccans, make-up is a sort of instinctive behavior to meet aesthetic and sexual desire. They also wear make-up for practical purpose of protection, intentionally inflict a wound on the skin for ceremonial or religious purpose, paint the skin with pigment, or have the part of the body tattooed for incantatory purpose. All this actions are regarded as make-up. The raw material of cosmetics is aker, a vegetable dye. They get the lips or cheeks turn red and paint eyebrows with yellow saffran powder to have a bad devil lose its strength. Tattooing is mainly done by women and viewed as a sign of their value or social organization they belong to. Sometimes that is used to represent a woman's being old enough to marry or getting married already or the frequency of marriage. Besides, tattoo is believed to prevent or remedy loose bowels or cough, depending on its location or pattern, and they often change tattoo according to the change of beauty art.

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초고전압 투과전자현미경의 원격제어 및 데이터 획득 시스템 (Remote Access and Data Acquisition System for High Voltage Electron Microscopy)

  • 안영헌;강지선;정현준;김형석;정형수;한혁;정종만;구중억;이상동;이지수;조금원;김윤중;염헌영
    • Applied Microscopy
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    • 제36권1호
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    • pp.7-16
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    • 2006
  • 가속전압 1.3MV의 초고전압투과전자현미경의 원격제어 시스템을 개발하였다. 초고전압투과전자현미경의 운영을 위한 필수적인 기능, 즉 stage조정, 시편의 tilting, TV카메라 선택과 영상 저장 등을 원격 운영시스템에 그대로 적용하였다. 특히 이 시스템은 간단한 웹 접속만으로 goniometer를 완벽하고 정밀하게 제어할 수 있으며 고해상도 디지털카메라를 제어할 수 있는 특징을 가지고 있다. 일체의 현미경 제어 신호 및 교신은 글로리아드 망을 통하여 이루어지도록 하였다. 이는 HVEM원격 운영시스템을 이용하여 국내는 물론 국제적인 공동 연구를 수행할 수 있는 가상 실험실 구축을 실현할 수 있음을 시사한다.