• Computers and Concrete
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• v.11 no.5
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• pp.475-492
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• 2013

Since the beginning of the 90 s, depending on the growth of the industrial sector in Turkey, factory constructions have been increased. The cost of precast concrete buildings is lower than the steel ones for this reason the precast structural systems are used more. Precast concrete structural elements are mostly as strong as not to have damage in the earthquake but weakness of connections between elements causes unexpected damages of structure during earthquake. When looking at the previous researches, it can be seen that there is a lack of studies about socket type base connections although there were many experimental and analytical studies about the connections of precast structural elements. The aim of this study is to investigate the stress transfer mechanism between column and the socket base wall with finite element method. For the finite element analysis ANSYS software was used. A finite element model was created which is the simulation of experimental research executed by Canha et al. (2009) under vertical and horizontal forces. Results of experimental research and finite element analysis were compared to create a successful simulation of experimental program. After determining the acceptable parameters, models of socket bases were created. Model dimensions were chosen according to square section column sizes 400, 450, 500, 550 and 600 mm which were mostly used in industrial buildings. As a result of this study, stress distribution at center section of the socket base models were observed and it is found that stress distribution affects triangular at the half of socket bottom and top.

• Journal of Periodontal and Implant Science
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• v.33 no.4
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• pp.563-571
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• 2003

One of the central components of periodontal therapy is the improvement of esthetics. The presence and appearance of interdental papillae plays an important role of periodontal esthetics. The aim of the present study was to investigate how immediate provisional restoration preserve the shape of interdental papilla around the extraction socket and the width of bucco-lingual of gingiva. Another aim was to investigate the change in the interdental papilla and the amount of vertical bone fill of a extraction socket in relation to the interdental alveolar bone levels adjacent the alveolar socket. A total of 19 patients (11 male, 8 female, mean age of 50.57${\pm}$8.16), who visited the Department of Periodontology, Pusan National University and had more than one anterior tooth scheduled to be extracted due to an advanced periodontal disease were included in the present study. After initial periodontal therapy, the extracted teeth were reshaped of the root and placed into the socket followed by splinting with adjacent teeth with self-curing resin. The width of hucco-lingual of gingiva and interdental papilla height were measured at baseline, 1, 3, 6, 9 and 12 month and the periapical radiographic examination were taken at baseline, 6 and 12month following the extraction. The amount of vertical bone fill in the extraction socket were calculated. At 12 months following the extraction, the changes in mesial and distal interdental papilla and the width of bucco-lingual showed -1.06${\pm}$0.48mm, -0.844${\pm}$0.50mm, -1.50${\pm}$0.96m, relatively. The positional change in the interproximal papillae was significantly associated with the interdental bone level adjacent to the extraction socket(p=0.028). The higher the interproximal bone level adjacent the extraction socket, the greater the amount of bone fill in the extraction socket(p<0.001). In conclusion, it was thought that immediate provisional restoration could minimize the loss of the width of bucco-lingual and interproximal papillae around the extraction socket. In addition, the higher the interproximal bone level adjacent the extraction socket, the greater the amount of bone fill and the smaller the reduction of papillary height around the extraction socket.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.255-259
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• 2002

네트워크 응용 프로그램을 개발하기 위해서는 Socket API를 많이 이용한다 Socket API를 이용해 정상적인 동작을 하는 것은 아주 쉽다. 실제 개발 과정에서 정상적인 상황이 아닌 여러 가지 비정상적인 오류에 대처하게 됨에 따라 속수무책일 때가 많다 따라서 각 플랫폼별로 비정상적인 오류들의 사례를 연구를 통하여 효율적인 응용시스템 개발의 필요성이 대두되었다. 본 연구에서는 프로그램의 각 CASE별로 네트워크 프로그램의 분석과 구조를 잡아 네트워크 응용 프로그램 개발시 복잡한 하위 계층의 구조를 완벽히 이해하지 않고 쉽게 개발할 수 있도록 한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2024.01a
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• pp.251-254
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• 2024

본 논문에서는 협업이라는 주제로 WebSocket을 활용한 웹 어플리케이션의 협업 기능 구현을 통해 다양한 사용자들이 자유롭게 소통하고 의견을 전달 할 수 있도록 웹 사이트를 제작하였다. 웹 어플리케이션의 기능인 그림그리기, 채팅, 파일전송 등을 통해 사용자가 전달하려는 정보를 여러 방법을 통해 전달 할 수 있도록 하여 본 연구를 통해 구현된 도구가 협업에 도움을 줄 것으로 기대한다.

• Applied Microscopy
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• v.19 no.2
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• pp.27-42
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• 1989

The forming process of scale and socket of Pieris rapae L. during in 30 hr. pupa to in adult was morphologically investigated with scanning electron microscopy and transmission electron microscopy. 1. The scale forming cells which were distinguished from other epidermal cells were first observed in 30 hr. pupa. In the aspect that scale forming cell beared some morphological relations to socket forming cells and in the distribution of its organelles, scale forming cell was divided into three regions-basal region in which nucleus located, neck region which was surrounded by socket forming cells and scale region that was the cytoplasmic projection region over the wing surface. In process of the development of scale forming cell neck region and scale region were extended into the molting space and at this time, the changes of surface structure of scale region have occurred initially. 2. There was a more distinct process that scale region changed into the scale. Scale region which was first originated as clublike projection of the cell body was subsequently elongated and flattened out by broadening of the cytoplasm. After that, in the surface of scale were formed longitudinal ridges and microribs. In the late pupa, the cytoplsam of scale region have autolyzed by lysosome-like bodies and at length, scale which had air spaces, trabecula, pigment granules, longitudinal ridges and transverse ridges. 3. The major protion of socket forming cell located beside neck region of scale forming cell under the wing surface but the processing portion of the cell lay over the wing surface, suggesting that socket forming cells have actively processing. In extending to the molting space of neck and scale region, socket forming cells developed to the molting space and constructed socket.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.43 no.3
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• pp.160-165
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• 2017

Objectives: Dry socket may occur secondary to the removal of any tooth. However, most dry socket cases develop in the third molar region. Dry socket is multifactorial in nature and has been treated using various modalities with varying success rates. This study assessed the efficacy of platelet rich fibrin (PRF) in established dry socket. Materials and Methods: Ten patients of either sex aged from 41 to 64 years with established dry socket according to established criteria were treated using PRF. Evaluation was performed by observing the reduction of pain using visual analogue scale, analgesic tablet use over the follow-up period, and healing parameters. Results: Pain was reduced on the first day in all patients with decreased analgesic use. Pain was drastically reduced during follow-up on the first, second, third, and seventh days with a fall in pain score of 0 to 1 after the first day alone. The pain scores of all patients decreased to 1 by the first day except in one patient, and the scores decreased to 0 in all patients after 48 hours. Total analgesic intake ranged from 2 to 6 tablets (aceclofenac 100 mg per tablet) over the follow-up period of 7 days. Healing was satisfactory in all patients by the end of the seventh day. Conclusion: PRF showed early pain reduction in established dry socket with minimal analgesic intake. No patients had allergic reactions to PRF as it is derived from the patient's own blood. PRF showed good wound healing. Our study suggests that PRF should be considered as a treatment modality for established dry socket.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.05a
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• pp.843-844
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• 2012

• The Transactions of the Korean Institute of Power Electronics
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• v.21 no.4
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• pp.290-295
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• 2016

Socket-outlets and plugs are essential devices that supply electric power into user appliances. During plug-out operation of an engaged plug from the socket-outlet, the consistent arc between the plug and the socket-outlet could develop into heavy fires in DC systems but only a small spark in AC systems. This paper proposes a pre-/post-electrode method to prevent plugs and socket-outlets from melting by sustaining arc energy. To implement the proposed pre-/post-electrodes, an experimental plug is manufactured with two electrodes, in which a post resistance Rs is connected in between. This paper investigates the function of the post resistance Rs, in which the best value of the post resistance Rs is obtained through simulation and experiment.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.30 no.11 s.254
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• pp.1433-1438
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• 2006

A systematic approach to socket shape design of a concave piston assembly for a high pressure hydraulic pump of an excavator is presented in this paper. A design model is given and a methodology of socket shape design is proposed. An axisymmetric rigid-plastic finite element method is employed for predicting the approximate socket shape formed by a rotary forming process as well as for simulating the test process for separating the shoe from the piston assembly designed. It is verified that the predictions are in good agreement with the experiments. The approach is successfully applied to developing an optimal concave piston assembly.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2007.05a
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• pp.75-83
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• 2007

본 논문에서는 .NET 기반의 Remoting 시스템과 Socket 통신을 이용하여 이 기종 DB Server 간의 Data 동기화를 구현하였다. 이 시스템은 Client 의 웹 브라우저를 이용 Socket 통신으로 Data를 전송하여 데이터베이스에 저장하는 방식으로 구현하였고, Data 읽기는 Remoting 기술인 중계 어플리케이션 서버의 클래스를 원격으로 실행시켜 Data를 가져오는 방식으로 구현하였다. DB 동기화는 Data를 저장할 때 중계 어플리케이션 서버와 DB 서버의 Data 관리 어플리케이션 간 비동기 통신으로 DB 서버의 Data 처리 수준을 실시간으로 감시하여 중계 어플리케이션 서버에서 선택적으로 Data를 전송하고, 이후 Data 처리 수준이 정상화기 되면 다시 Data를 전송케 함으로써 이 기종 DB 서버간의 동기화를 구현하였다. 본 논문은 1 장에 서론, 2 장에 .NET Remoting 기술과 네트워크 프로그래밍, 3 장에 이 기종 DB 서버 간 동기화 시스템 설계 및 구현, 4 장에 결론을 기술하였다.