• Title/Summary/Keyword: Hand Technique

Search Result 1,355, Processing Time 0.029 seconds

Treatment of Calcified Cephalhematoma (석회화된 두혈종의 치료)

  • Jhang, Sung Jo;Kim, Tae Young;Kim, Jong Moon
    • Journal of Korean Neurosurgical Society
    • /
    • v.29 no.1
    • /
    • pp.23-27
    • /
    • 2000
  • Cephalhematoma is a common entity in infancy, usually caused by difficult labor. On the other hand, calcified cephalhematomas are seen infrequently, even by pediatric neurosurgeons, Indications for surgery and techniques have not been clearly defined. In this report, we present a child with a large, calcified cephalhematoma and discuss its surgical technique.

  • PDF

The Application Method of System Safety Analysis Technique (시스템 안전 분석기법 활용방안에 대한 연구)

  • 김병석;임재동
    • Journal of the Korea Safety Management & Science
    • /
    • v.2 no.3
    • /
    • pp.1-11
    • /
    • 2000
  • Avoiding the industrial accidents is one of the goals in manufacturing industries from the top manager to the foremen. Therefore all the companies try to prevent occupational accidents using system safety programs in order to increase the productivity. Korean industries have been tended to depend upon historical information to control risks. The other hand, foreign industries have identified risk factors using system safety techniques to predict future risks. This study presents the method to apply the foreign industries risk control technique to the Korean industries.

  • PDF

The Application Method of System Safety Analysis Technique (시스템 안전 분석기법 활용방안에 대한 연구)

  • 김병석
    • Proceedings of the Safety Management and Science Conference
    • /
    • 1999.11a
    • /
    • pp.355-363
    • /
    • 1999
  • Free from the industrial accident is the goal from top manager to foreman. Therefore all the company try to prevent occupational accident using system safety program in order to increase productivity Korean industries have been tend to depending upon historical information to control risk. The other hand, foreign industries have been Identify risk factors using system safety techniques to predict future risk. Therefore, this study is presented to applying the foreign industries's risk control technique to korean industries.

  • PDF

A Case Study about Improvement and System of Management in Park, Japan (일본의 도시공원의 운영관리체계와 개선에 관한 사례적 고찰)

  • 이기철
    • Journal of the Korean Institute of Landscape Architecture
    • /
    • v.21 no.2
    • /
    • pp.80-90
    • /
    • 1993
  • This study was a case about improvement and system of management in park of Japan. Technique of Maintenance make a rapid progress. In the other hand, management was fall behind. Because of, its was not accept change of consciousness and variety of social factor. That is, not make clearly system of administration(organization, budget, etc.) for qualitative improvement of park. Besides, not make accumulation data of management and technique of maintenance. In future, need many study about system of management.

  • PDF

Canal preparation with nickel-titanium or stainless steel instruments without the risk of instrument fracture: preliminary observations

  • Yared, Ghassan
    • Restorative Dentistry and Endodontics
    • /
    • v.40 no.1
    • /
    • pp.85-90
    • /
    • 2015
  • This report introduces a novel technique that allows a safe and predictable canal negotiation, creation of a glide path and canal preparation with reciprocating nickeltitanium or stainless steel engine-driven instruments in canals where the use of rotary and the newly developed reciprocating instruments is contraindicated. In this novel technique, the instruments are used in reciprocating motion with very small angles. Hand files are not used regardless of the complexity of the canal anatomy. It also allows achieving predictable results in canal negotiation and glide path creation in challenging canals without the risk of instrument fracture.

Microscopic Approach of Mass Involving Neurovascular Pedicle in the Hand (신경혈관 줄기를 침범한 수부종양의 미세현미경적 접근)

  • Hwang, Min-Kyu;Hwang, So-Min;Lim, Kwang-Ryeol;Jung, Yong-Hui;Song, Jennifer Kim
    • Archives of Reconstructive Microsurgery
    • /
    • v.21 no.2
    • /
    • pp.86-91
    • /
    • 2012
  • Purpose: Mass can compress around tissue and cause deviation of normal anatomical structures. Often, mass grows toward neurovascular pedicle and encircles depending on the nature of mature mass. Neglecting neurovascular involvement of the mass is a serious problem not to be overlooked. Authors have performed microscopic approach regarding mass involving the neurovascular pedicle in the hand. Materials and Methods: From January 2007 through February 2012, retrospective analysis for nine cases of mass involving neurovascular pedicles was done. Patients were evaluated preoperatively by ultrasonography or MRI and checked intraoperative finding. Masses were evaluated by site, preoperative evaluation, involved neurovascular pedicle, histopathologic diagnosis, complication, and recurrence. Results: The site of mass involving neurovascular pedicles was 4 cases on the wrist, 2 cases on the palm, 2 cases on the finger, 1 case on the hand dorsum. Involved neurovascular pedicles were 3 radial arteries and nerves, 3 proper digital arteries and nerves, 1 radial artery, 1 superficial branch of radial nerve, 1 common digital artery and nerve. The histopathologic diagnosis of mass were 3 ganglions, 2 giant cell tumors, 2 epidermal cysts, 1 fibroma, and 1 benign spindle tumor. There were 2 cases of recurrence and secondary excisions were performed. Conclusion: Neurovascular pedicle injury can lead to serious complication like sensory and motor disorders, distal part ischemia, and so on. In case of mass suspected neurovascular invasion, accurate preoperative evaluation such as ultrasonography or MRI is necessary. To prevent any neurovascular related complication during mass excision, delicate surgical technique using a microscope becomes essential.

  • PDF

Implementation of DID interface using gesture recognition (제스쳐 인식을 이용한 DID 인터페이스 구현)

  • Lee, Sang-Hun;Kim, Dae-Jin;Choi, Hong-Sub
    • Journal of Digital Contents Society
    • /
    • v.13 no.3
    • /
    • pp.343-352
    • /
    • 2012
  • In this paper, we implemented a touchless interface for DID(Digital Information Display) system using gesture recognition technique which includes both hand motion and hand shape recognition. Especially this touchless interface without extra attachments gives user both easier usage and spatial convenience. For hand motion recognition, two hand-motion's parameters such as a slope and a velocity were measured as a direction-based recognition way. And extraction of hand area image utilizing YCbCr color model and several image processing methods were adopted to recognize a hand shape recognition. These recognition methods are combined to generate various commands, such as, next-page, previous-page, screen-up, screen-down and mouse -click in oder to control DID system. Finally, experimental results showed the performance of 93% command recognition rate which is enough to confirm the possible application to commercial products.

MPEG-U based Advanced User Interaction Interface System Using Hand Posture Recognition (손 자세 인식을 이용한 MPEG-U 기반 향상된 사용자 상호작용 인터페이스 시스템)

  • Han, Gukhee;Lee, Injae;Choi, Haechul
    • Journal of Broadcast Engineering
    • /
    • v.19 no.1
    • /
    • pp.83-95
    • /
    • 2014
  • Hand posture recognition is an important technique to enable a natural and familiar interface in HCI(human computer interaction) field. In this paper, we introduce a hand posture recognition method by using a depth camera. Moreover, the hand posture recognition method is incorporated with MPEG-U based advanced user interaction (AUI) interface system, which can provide a natural interface with a variety of devices. The proposed method initially detects positions and lengths of all fingers opened and then it recognizes hand posture from pose of one or two hands and the number of fingers folded when user takes a gesture representing a pattern of AUI data format specified in the MPEG-U part 2. The AUI interface system represents user's hand posture as compliant MPEG-U schema structure. Experimental results show performance of the hand posture recognition and it is verified that the AUI interface system is compatible with the MPEG-U standard.

Optimal 3D Grasp Planning for unknown objects (임의 물체에 대한 최적 3차원 Grasp Planning)

  • 이현기;최상균;이상릉
    • Proceedings of the Korean Society of Precision Engineering Conference
    • /
    • 2002.05a
    • /
    • pp.462-465
    • /
    • 2002
  • This paper deals with the problem of synthesis of stable and optimal grasps with unknown objects by 3-finger hand. Previous robot grasp research has analyzed mainly with either unknown objects 2D by vision sensor or unknown objects, cylindrical or hexahedral objects, 3D. Extending the previous work, in this paper we propose an algorithm to analyze grasp of unknown objects 3D by vision sensor. This is archived by two steps. The first step is to make a 3D geometrical model of unknown objects by stereo matching which is a kind of 3D computer vision technique. The second step is to find the optimal grasping points. In this step, we choose the 3-finger hand because it has the characteristic of multi-finger hand and is easy to modeling. To find the optimal grasping points, genetic algorithm is used and objective function minimizing admissible farce of finger tip applied to the object is formulated. The algorithm is verified by computer simulation by which an optimal grasping points of known objects with different angles are checked.

  • PDF

The Optimal Grasp Planning by Using a 3-D Computer Vision Technique (3차원 영상처리 기술을 이용한 Grasp planning의 최적화)

  • 이현기;김성환;최상균;이상룡
    • Journal of the Korean Society for Precision Engineering
    • /
    • v.19 no.11
    • /
    • pp.54-64
    • /
    • 2002
  • This paper deals with the problem of synthesis of stable and optimal grasps with unknown objects by 3-finger hand. Previous robot grasp research has mainly analyzed with either unknown objects 2-dimensionally by vision sensor or known objects, such as cylindrical objects, 3-dimensionally. As extending the previous work, in this study we propose an algorithm to analyze grasp of unknown objects 3-dimensionally by using vision sensor. This is archived by two steps. The first step is to make a 3-dimensional geometrical model for unknown objects by using stereo matching. The second step is to find the optimal grasping points. In this step, we choose the 3-finger hand which has the characteristic of multi-finger hand and is easy to model. To find the optimal grasping points, genetic algorithm is employed and objective function minimizes the admissible force of finger tip applied to the objects. The algorithm is verified by computer simulation by which optimal grasping points of known objects with different angle are checked.