• Journal of the Korean Wood Science and Technology
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• 제41권4호
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• pp.318-326
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• 2013

소나무와 스프루스재를 사용하여 핑거공차를 0.15 mm로 고정하고 핑거피치 4.4 mm (Type S)와 6.8 mm(Type L)의 2종류 및 레조시놀 페놀 수지 접착제 및 수용성 비닐 우레탄 수지접착제로 2종류의 사용하여 종접합시키고 또한 2본의 종접합재를 이용하여 횡방향으로 핑거접합부를 양쪽으로 이동시키면서 접착하여 핑거접합부위의 배치거리를 접합재의 두께를 기준으로 하중점 중앙으로부터 양쪽 핑거접합부까지의 거리를 접합재 두께의 비율($R_t$) 0, 1.5, 2, 2.5, 3배의 5조건으로 제조하여 3점 중앙집중식 휨강도성능시험을 한 결과는 다음과 같다. 1) 휨탄성계수는 핑거접합부의 위치 이동과 관계없이 접착제의 종류, 핑거의 형상에 따른 영향은 나타나지 않았다. 2) 휨강도는 접착제의 종류, 핑거의 형상에 관계없이 하중점 중앙에서부터 멀어질수록 거의 직선적으로 증가하였으며 핑거접합부가 소재두께 비율의 3배에서는 소재와 같은 값을 나타내었다. 3) 시험편의 파괴는 하중점 중앙에서부터의 핑거접합부까지의 거리가 두께의 비율이 0, 1.5배에서 모두 핑거접합부에서 파괴되었으며 거리가 멀어질수록 접합부에서의 파괴가 적게 일어나다가 두께비율의 3배에서는 전혀 나타나지 않았다.

• Archives of Reconstructive Microsurgery
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• 제21권1호
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• pp.21-26
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• 2012

The radial artery superficial palmar branch free flap is based on the perforators of the superficial palmar branch of the radial artery and its venae comitantes. This flap can be used as a sensible flap including palmar cutaneous branch of the median nerve. Forty radial artery superficial palmar branch free flaps were performed at Centum Institute during October 2010 to December 2011. There were 32 males and 8 females and their mean age were 48 years (range 30 to 66 years). The thumb injured in 13 patients, the index finger in 16 patients, the middle finger in 4 patients, the ring finger in 2 patients, and the little finger in 5 patients. The mean size of the flap was $2.5{\times}3.5$ cm(range $2{\times}2.5$ to $3{\times}7$ cm). The donor site was always closed primarily. The overall survival rate was 90.2 percent. The flaps showed well-padded tissue with glabrous skin. All patients have touch sensation and showed 12 mm two point discrimination in an average(range 8 to 15 mm). Donor site morbidity was conspicuous. One patient showed unsightly scar. Early postoperative range of motion of the affected thumb showed slightly limited radial and palmar abduction. But it improved after postoperative 2 months, and patients did not complaint limitation of motion. In conclusion, the radial artery superficial palmar branch free flap can be used as an option for soft tissue reconstruction of finger defects where local or island flaps are unsuitable.

• Archives of Plastic Surgery
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• 제37권3호
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• pp.304-308
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• 2010

Purpose: Many causes for triggering or locking of the fingers have been discussed in other literatures. The most common one is known stenosing tenosynovitis, which causes, a mismatch between the volume of the flexor tendon sheath and its contents. However, repeated trauma to the hand is uncommon cause of trigger finger. Therefore, we present a case of a rare condition of stenosing tenosynovitis which developed from a repeated relatively weak superficial flexor tendon injury. Methods: The patient was a 62-year-old woman who showed a painless, fixed and round mass on her right hand with no particular cause. Active and passive range of motion of the metacarpophalangeal joint of long finger was limited in flexion and extension. Ultrasonographic finding showed injured flexor digitorum superficialis tendon had fibrillar architecture with swelling between hyperechoic synovial membrane and hypoechoic surrounding area. Surgical exploration revealed that a bunched portion of the flexor digitorum superficialis and A1 pulley cause triggering during operation after adhesiolysis of scar tissue. Results: After releasing the A1 pulley, the range of motion of the metacarpophalangeal joint of long finger showed no limitation and histological examination of the subcutaneous tissue revealed fibrous fatty degeneration. In this case, releasing the A1 pulley with adhesiolysis of the subcutaneous scar tissue was successful and we obtained good functional outcome. Conclusion: We examined a patient in whom a repetitive impact forces to the palm caused longitudinal tear of the flexor tendon, leading to trigger finger. We experienced a rare case of stenosing tenosynovitis and trigger finger caused after close injury to flexor digitorum superficialis and its degenerative changes that caused mass like effect. To the best of authors' knowledge, our case of close injury to the flexor digitorum superficialis and unique morphologic change before rupture of tendon is rarely to be reported.

• Archives of Plastic Surgery
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• 제43권2호
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• pp.134-144
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• 2016

In adults, mallet finger is a traumatic zone I lesion of the extensor tendon with either tendon rupture or bony avulsion at the base of the distal phalanx. High-energy mechanisms of injury generally occur in young men, whereas lower energy mechanisms are observed in elderly women. The mechanism of injury is an axial load applied to a straight digit tip, which is then followed by passive extreme distal interphalangeal joint (DIPJ) hyperextension or hyperflexion. Mallet finger is diagnosed clinically, but an X-ray should always be performed. Tubiana's classification takes into account the size of the bony articular fragment and DIPJ subluxation. We propose to stage subluxated fractures as stage III if the subluxation is reducible with a splint and as stage IV if not. Left untreated, mallet finger becomes chronic and leads to a swan-neck deformity and DIPJ osteoarthritis. The goal of treatment is to restore active DIPJ extension. The results of a six- to eight-week conservative course of treatment with a DIPJ splint in slight hyperextension for tendon lesions or straight for bony avulsions depends on patient compliance. Surgical treatments vary in terms of the approach, the reduction technique, and the means of fixation. The risks involved are stiffness, septic arthritis, and osteoarthritis. Given the lack of consensus regarding indications for treatment, we propose to treat all cases of mallet finger with a dorsal glued splint except for stage IV mallet finger, which we treat with extra-articular pinning.

• 한국정보과학회논문지:소프트웨어및응용
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• 제37권11호
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• pp.859-865
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• 2010

이 논문에서 손가락 정맥영상에 대한 새로운 인식 방법을 제시한다. 손가락 정맥인식은 대중적으로 사용되고 있는 지문인식의 위조가능성을 배제할 수 있고, 홍채인식의 불편한 영상획득 방식을 피할 수 있는 좋은 개인 인중 방편으로 주목 받고 있다. 손가락 정맥영상을 지역적 히스토그램 균등화에 의하여 전처리하고, 이것을 세선화 처리하여 선 형태의 정맥을 얻는다. 이렇게 얻어진 선 형태의 정맥선 영상에 HS정합 알고리즘(HeeSung's Matching Algorithm) 이라고 명명된 새로운 정합 알고리즘을 적용하여 정맥의 정합 여부를 가린다. 이 새로운 정합 알고리즘은 세선화나 에지 검출 처리한 여러 가지 선 모양의 영상인식에 좋은 효과를 보이고 있다. 개인당 5편씩 총 130명분 650편의 손가락 영상에 대한 인식실험 결과 99.20%의 인식률을 보였다. 한 쌍의 영상 정합처리에 단 60ms 의 처리 속도를 보였다.

• Journal of the Korean Wood Science and Technology
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• 제35권5호
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• pp.7-15
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• 2007

To evaluate the durability of finger-jointed woods according to change of humidity conditions, four types of finger-jointed woods glued with different kinds of adhesives and finger pitches were made with Sitka spruce, and the effect of humidity conditions on creep performances was investigated. The shape of creep curves differed among humidity conditions, and the inclination of creep curves was greatest in 85%RH, and lowest in 65%RH. Their creep curves showed a linear behavior beyond approximately one hour, regardless of humidity conditions. The A values of the creep curves fitted to power law increased with increasing relative humidity, whereas the A' values were in order of 30 > 85 > 65%RH unlike the A values. The initial deformation increased with increasing relative humidity, whereas the creep deformation unlike the initial deformation was in order of 85 > 30 > 65%RH, and it was found that the creep deformation of finger-jointed woods indicated the smaller amount in air-dry moisture content rather than in a low moisture content less than 30%RH. Finger-jointed woods with 6.8 mm (L) pitch had the greater creep amount than in those with 4.4 mm (S) pitch in all humidity conditions. The difference of creep amount between both adhesives in all humidity conditions was small. Relative creep at 240 hr was greatest as 62.2~71.9% in 85%RH, and the values indicated 2.1~2.6 times that of 30%RH and 3.0~3.6 times that of 65%RH and were equal or slightly greater than that of solid spruce.

• 한국조리학회지
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• 제24권1호
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• pp.39-49
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• 2018

In this study, the traditional takju was manufactured using the finger root, which was recognized as a health functional ingredient, and analyzed the physicochemical and sensory quality characteristics according to the period of fermentation. The pH was significantly low(p<0.05) in all samples until the second day of fermentation, and the pH tended to increase again from the third day of fermentation. The pH value was decreased as the amount of finger root was decreased(p<0.05). The acidity of takju was significantly lower at 0.17~0.21 immediately after fermentation(p<0.05). The acidity of FR0 showed significantly the highest value(p<0.05). The sugar content of takju was significantly increased in all the samples until the 2nd day of fermentation(p<0.05). On the 7th day, it showed the lowest value at $11.01{\sim}12.63^{\circ}Brix$. The sugar content of FR0 was significantly lowest value(p<0.05). The alcohol content of takju was significantly increased as the fermentation proceeded, and the highest value was 11.90~13.50% at 7 days(p<0.05). The alcohol content of RF0 was significantly higher than other samples(p<0.05). As a result of organic acid analysis of finger root takju fermented for 7 days, citric acid(3.35%) showed the highest content of FR3(p<0.05). The content of fructose increased with increasing finger root amount (p<0.05). As a result of sensory evaluation of finger root takju, FR1 and FR2 samples tended to be lower in score than FR0, and FR3 showed the highest score. The overall acceptance value of FR0 was 7.5 and FR3 was 7.57.

• 한국정보통신학회논문지
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• 제16권10호
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• pp.2177-2184
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• 2012

실내 위치인식 방법은 GPS 기반의 실외 위치인식 방법과 비교하여 보다 높은 정확도를 요구하며 그 중요성 또한 증가하고 있다. FingerPrint 위치인식 방법은 데이터베이스에 참조변수의 수신신호패턴을 미리 저장하고, 단말기의 실시간 측정 신호를 매칭시킴으로써 단말의 위치를 추정하는 뛰어난 실내 위치인식 방법이다. FingerPrint 위치인식 방법에서는 정확한 데이터베이스 구축이 요구되지만 여러 가지 요인에 의하여 오차가 발생할 수 있다. 본 연구에서는 접근 지점의 연결여부에 따른 각 단말기의 수신신호 패턴을 분석하여, 접근 지점의 연결 여부에 따른 오차가 FingerPrint DB 구성의 중요한 오차 요인이 될 수 있음을 실험을 통하여 밝힌다.

• International Journal of Precision Engineering and Manufacturing
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• 제5권3호
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• pp.54-61
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• 2004

This paper describes the development of a 6-axis robot's finger force/moment sensor, which measures forces $F_x$(x-direction force), $F_y$and $F_z$, and moments $M_x$ (x-direction moment), $M_y$ and $M_z$ simultaneously, for stable grasping of an unknown object. In order to safely grasp an unknown object using the robot's gripper, the force in the gripping direction and the force in the gravity direction should be measured, and the force control should be performed using the measured forces. Also, the moments $M_x$, $M_y$ and $M_z$ to accurately perceive the position of the object in the grippers should be detected. Thus, the robot's gripper should be composed of 6-axis robot's finger force/moment sensor that can measure forces $F_x$, $F_y$ and $F_z$, and moments $M_x$ $M_y$ and $M_z$ simultaneously. In this paper, the 6-axis robot's finger force/moment sensor for measuring forces $F_x$, $F_y$ and $F_z$, and moments $M_x$ $M_y$ and $M_z$ simultaneously was newly modeled using several parallel-plate beams, designed, and fabricated. The characteristic test of the fabricated sensor was performed, and the result shows that interference errors of the developed sensor are less than 3%. Also, Robot's gripper with the 6-axis robot's finger force/moment sensor for the characteristic test of force control was manufactured, and the characteristic test for grasping an unknown object using the sensors was performed using it. The fabricated gripper could grasp an unknown object stably. Thus, the developed 6-axis robot's finger force/moment sensor can be used for robot's gripper.

• 대한치과기공학회지
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• 제33권4호
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• pp.331-337
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• 2011

Purpose: The purpose of this study was to impact of force system change in finger spring that add helical coil one round on orthodontic force. Methods: The following conclusions were drawn from the experiment conducted after bending 90 samples with a CNC wire forming machine while changing the height and lumen size to 1mm - 3mm - 5mm and 2mm - 3mm - 4mm respectively in the coil of the force system in finger spring added with one wheel of helical coil of 18-8 stainless steel round wire (${\Phi}0.5mm$, spring hard) from Jinsung Co. in domestic market under the following conditions: Laboratory name = Instron 5942; Temperature($deg^{\circ}C$) = 18.00; Humidity(%) = 50.00; Rate 1 = 10.00000 mm/min; Compressive extension = 5.0mm. Results: When Coil height is 1, 3, 5mm and lumen size is 2, 3, 4mm reduce finger spring as mean value of compressive extension occasion maximum load(mN) increases as coil height rises, and lumen size grows to 5.0mm. And was expose that compressive load(mN) increases as coil position of finger spring rises and increase as lumen size is decrescent. Conclusion: As the adherence height of coil was raised from 1mm through 3mm to 5mm, compressive load increased. As the lumen size increased from 2mm through 3mm to 4mm, compressive load decreased. Therefore, these results suggest that it is desirable to lower the coil height and enlarge the lumen size to enhance the biomechanical efficiency of finger spring when manufacturing the finger spring for removable orthodontic devices.