• Title/Summary/Keyword: technique

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A Study on Origin and Differentiation of Korean Paper Art (한지공예 기법의 원류 고찰과 한지공예의 분화)

  • Jeon, Cheol
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.43 no.4
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    • pp.11-22
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    • 2011
  • Jeonji technique was widely used in general Hanji handicraft including Jihwa handicraft. But the technique itself has not been passed on. By contrast, Jiseung technique and Jiho technique have been passed on and continuously developed. And although the Huji technique has not been transmitted, it should be vigorously used as a technique of producing the frame in order to revive the authenticity of traditional Hanji handicraft. Jumchi technique, a method of using water to connect between layers, is an effective technique of diversely expressing the feel of materials of Hanji craftworks. Modern Hanji handicraft has used the characteristics of paper and paperboard diversely produced nowadays as much as possible, which shows that it is more likely to develop as handicraft.

EFFECT OF IMPRESSION TECHNIQUES ON ACCURACY OF MASTER CASTS FOR IMPLANT PROSTHESES (인상채득 방법이 임플란트 보철 작업모형의 정확도에 미치는 영향)

  • Hong Eun-Hee;Han Dong-Hoo
    • The Journal of Korean Academy of Prosthodontics
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    • v.32 no.3
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    • pp.445-454
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    • 1994
  • Osseointegrated implant prostheses are to provide normal function without compromising the unique interaction between the tissue and the implant. The essential requirement for the osseointegrated implant prostheses is passive fit of abutment. Therefore, the impression must be accurate and reproduciable since the resultant master cast precisely duplicates the clinical condition. The purpose of this study was to compare the accuracy of the master casts obtained from five impression techniques. Group 1 : To take impression with indirect technique and Impregum F. Group 2 : To take impression with unsplinted direct technique and Impregum F. Group 3 : To take impression with splinted direct technique and Impregum F. Group 4 : To take impression with unsplinted direct technique and Xanthano. Group 5 : To take impression with splinted dierct technique and Xanthano. The results were as follow : 1. In taking impression of Impregum F, there was no significant difference between to use of indirect technique and unsplinted direct technique.(p<0.05) 2. Unsplinted direct technique with Impregum F is less accurate than splinted direct technique with Impregum F or Xanthano and unsplinted direct technique with Xanthano.(p<0.05). 3. There was no significant difference between splinted direct technique with Impregum F and unsplinted direct technique with Xanthano.(p<0.05) 4. Splinted direct technique reproduce more accurate than unsplinted direct technique.(p<0.05) 5. Impression plaster produced less distortion than polyether.(p<0.05) As a result, splinted direct technique with Xanthano was the most accurate technique. As a result, splinted direct technique with Xanthano was the most accurate technique in this study. In addition to dimensinal changes in the materials used, positional errors were also attributed to the mechanical components used in the transfer porocess. Although the errors measured were relatively small, this study demonstrates the potential for distortions with the transfer technique used. Further study is indicated that ?the technique will be able to reproduce the intraoral relationship of implant fixtures reliably and predictably.

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ACTION POTENTIAL DIFFERENCES AND REGENERATION EFFECT AFTER MICRONEURAL SUTURE TECHNIQUE AND FIBRIN ADHESIVE TECHNIQUE IN RAT SCIATIC NERVE (신경문합술과 피브린접합술 후 활동전위차 및 신경재생 효과)

  • Jung, Tae-Young;Kim, Uk-Kyu;Chung, In-Kyo;Shin, Sang-Hoon
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • v.31 no.5
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    • pp.427-435
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    • 2005
  • The purpose of this study was to compare clinical availability of fibrin adhesive technique with microneural suture technique. We applicated fibrin adhesive technique and microneural suture technique on cut sciatic nerve in rat and used to Compound muscle action potential of rat thigh muscle compartment and histologic finding for comparision of clinical availability. The results were as following. 1. Using latency and amplitude in Compound muscle action potential test, we compared microneural suture technique with fibrin adhesive technique for nerve regeneration effect. the means was slightly different between two method. but there's no statistically significant differences. 2. Histologic finding was similar in microneural suture technique and fibrin adhesive technique for regeneration of axon and myelin sheath in destruction site after nerve anastomosis. These results showed that the efficacy of fibrin adhesive technique was similar to that of conventional microneural suture technique. Moreover, fibrin adhesive technique is decreased operating time and imporved of incapability of accessment in conventional suture technique. Therefore this technique is a useful method to nerve anastomosis in nerve enervation and neurotransplantation.

The Effect of Dose Distribution under Treatment Techniques on Cerebrospinal Irradiation (뇌 및 척수조사시 치료기법의 변화가 선량분포에 미치는 영향)

  • Lee, Seungchul;Kim, Youngjae
    • Journal of the Korean Society of Radiology
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    • v.10 no.1
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    • pp.21-28
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    • 2016
  • This study tries to evaluate the usefulness CSI treatment. Compare the standard technique and simple technique, using the volume region of a high dose of Field joints (hot spot) or low dose regions (cold Spot). In patients who agreed to this study, obtain CT image using CT simulator skull to pelvis region. Standard Technique were performed on the movement of the joint radiation field range and simple technique has set a treatment plan to secure the radiation field range and analyzed treatment planning. Under analysis standard technique occurred the area of the high dose(Hot Spot) for the area overlapping the field and simple technique showing a uniform doses. CI indices of standard technique and simple technique was 1.6~3, 1.6~1.87, CN indices was 0.32~0.53, 0.46~0.51 and HI indices was 0.11~0.33, 0.2~0.26. Therefore, adjacent to part of the dose distribution junction more equally than simple technique compared to the Standard Technique. Compare the dose distribution patterns using CI, CN, HI indices, showed a uniform dose distribution in the simple technique. so, simple technique was determined appropriate treatment the CSI.

A study on the appropriateness of using traditional technique in the field of Architectural heritage conservation - Through Comparing properties - (건조물 문화재 수리에 있어서 전통기술의 적합성 연구 - 기술의 속성 비교를 통하여 -)

  • Oh, Kyusung
    • Journal of architectural history
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    • v.31 no.5
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    • pp.7-20
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    • 2022
  • Traditional building technique has been used as the main technology in the field of architectural heritage conservation in South Korea. It has remained this way with very little resistance until now. But the time has come to question the appropriateness of traditional technique as conservation technique. In this paper a study was done on the properties of the traditional technique and the architectural heritage conservation technique in order to define the appropriateness between the two techniques. As a result the traditional technique was found to be unfit for conservation technique. The reasons are as follows. First, there is a time gap between the traditional technique and the time when the heritage was first built. Second, conservation work is about retaining the values of being a heritage while the traditional technique is about safeness and practicality. Third, the use of traditional technique comes with using the tools of its time which cannot ensure the safety of the heritage. The traditional technique must be looked upon as one of an option in the field of conservation. We must develop a better conservation technology by finding balance between the traditional technique and modern science. And further more an aggressive investment must be made in order to realize this objective.

Cuff Technique for Small-Diameter Vascular Grafts in the Systemic Arterial Circulation of the Rat

  • Cho, Sukki;Song, In Hag
    • Journal of Chest Surgery
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    • v.51 no.6
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    • pp.423-426
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    • 2018
  • This study determined the feasibility of the cuff technique for small-caliber vascular grafts in a rat model. A graft was implanted with the cuff technique or suture technique in a 1-cm segment of the abdominal aorta in 12 rats. The mean aortic clamp time was 29 minutes with the cuff technique and 44 minutes with the suture technique; the cuff technique was significantly shorter. Abdominal angiography at 1 week after implantation showed no significant stenosis in 9 rats, focal stenosis of the mid-portion of the graft in 1 rat with each technique, and total occlusion of the graft in 1 rat with the suture technique. We have successfully used the cuff technique for anastomosis for small-caliber vascular grafts in an animal model.

An Improved Reversible Data Hiding Technique using Histogram Characteristics and Double Encryption Technique

  • Soo-Mok Jung
    • International Journal of Internet, Broadcasting and Communication
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    • v.16 no.1
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    • pp.132-139
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    • 2024
  • In this paper, we proposed an effective technique that uses location-based encryption technique and spatial encryption technique to improve security vulnerabilities in previous reversible data hiding technique that can hide twice as much confidential data as the NSAS technique. If the proposed technique is applied to hide confidential data in an image, the same amount of confidential data can be hidden compared to the previous technique, but the security of confidential data is greatly enhanced. By hiding confidential data in an image using the proposed technique, high-quality stego-image can be generated, making it impossible to visually distinguish whether confidential data is hidden in the image. Additionally, confidential data can be restored from stego-image without loss, and the original cover image can also be restored without loss. Through experiments, it was confirmed that when confidential data is hidden by applying the proposed technique, the quality of the stego-image is maintained up to 39.73dB, and the security of the stego-image is greatly strengthened.

A Groove Technique for Securing an Electrode Connector on the Cranial Bone : Case Analysis of Efficacy

  • Lee, Sung-Woo;Lee, Myung-Ki;Seo, Il;Kim, Ho-Sang;Kim, Jeong-Ho;Kim, Yun-Suk
    • Journal of Korean Neurosurgical Society
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    • v.56 no.2
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    • pp.130-134
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    • 2014
  • Objective : A groove technique for securing an electrode connector was described as an alternative surgical technique in deep brain stimulation (DBS) surgery to avoid electrode connector-related complications, such as skin erosion, infection, and migration. Methods : We retrospectively reviewed 109 patients undergoing one of two techniques; the standard technique (52 patients using 104 electrodes) and the groove technique (57 patients using 109 electrodes) for securing the electrode connector in DBS surgery, regardless of patient disease. In the standard percutaneous tunneling technique, the connector was placed on the vertex of the cranial surface. The other technique, so called the groove technique, created a groove (about 4 cm long, 8 mm wide) in the cranial bone at the posterior parietal area. Wound erosion and migration related to the connectors were compared between the two techniques. Results : The mean follow-up period was 73 months for the standard method and 46 months for the groove technique. Connector-related complications were observed in three patients with the groove technique and in seven patients with the standard technique. Wound erosion at the connector sites per electrode was one (0.9%) with the groove technique and six (5.8%) with the standard technique. This difference was statistically significant. The electrode connector was migrated in two patients with the groove technique and in one patient with the standard technique. Conclusions : The groove technique, which involves securing an electrode using a groove in the cranial bone at the posterior parietal area, offers an effective and safe method to avoid electrode connector-related complications during DBS surgery.

A Suggestion for Randomized Response Technique using Fuzzy Logic

  • Choi, Kyung-Ho
    • Communications for Statistical Applications and Methods
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    • v.8 no.2
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    • pp.465-471
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    • 2001
  • Randomized response technique is a survey technique for eliminating evasive answer bias. But this technique has a problem. This procedure suffers from linguistic expression in randomizing device. Thus for solving the problem, in this paper, we suggested the randomized response technique using fuzzy logic.

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A Study on Distributed Indexing Technique for Digital Library (디지털 도서관을 위한 분산색인 기법에 대한 연구)

  • Yu, Chun-Sik;Lee, Jong-Deuk;Kim, Yong-Seong
    • The Transactions of the Korea Information Processing Society
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    • v.6 no.2
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    • pp.315-325
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    • 1999
  • Indexing techniques for distributed resources have much effect on an information service system based on distributed environment like digital library. There is a centralized indexing technique, a distributed technique, and a mixed technique for distributed indexing techniques. In this paper, we propose new distributed indexing technique using EIF(extended Inverted File) structure that mix the centralized technique and t도 distributed technique. And we propose management techniques using EIF structure and retrieval technique using EIF structure. This distributed indexing technique proposed is able to fast process retrieval request and reduce network overload and select servers relevant to query terms. This paper investigated performance of a proposed distributed indexing technique.

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