• Title, Summary, Keyword: SPT

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Bearing capacity Calculation of Displacement in-situ Concrete Pile (비배토 현장타설 콘크리트 말뚝의 지지력 산정에 관한 연구)

  • 박종배;박태순
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.65-84
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    • 2000
  • Europe and US which have more restrictive regulations than Korea about the noise and vibration during construction are using Auger-cast Pile to reduce the problem relating with noise and vibration. However Auger-cast Pile has problems like difficult quality control and low bearing capacity. In Europe, Displacement in-situ concrete Pile has been used to sove that problems since 1990s, and Korea has performed the test construction in 1997 and it has been used as the real structural foundation since 1998. Test and real construction results verified that the allowable capacity of the pile(diameter = 410mm) is between 70 and 100ton. Though De Beer & Van Imps design method utilizing CPT result is used to calculate the bearing capacity of the Displacement in-situ Pile, Korea is dependant upon the SPT as the sounding test, so design method utilizing SPT result is necessary to promote the application of the pile. To find out reasonable design method using SPT result, rearing capacity of the pile constructed in sand and clay in Korea was calculated using Meyerhof, SPT-CPT translation method, Nordlund, Douglas and DM-7 method, and the calculation results were compared to the load test result. Analysis result shows that SPT-CPT translation method is more reliable than others and economical design can be possible because it considers efficiently the friction capacity of Displacement in-situ Pile.

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Hammer Energy Level of SPT in Korea (표준관입시험의 해머에너지 수준)

  • 이호준;박용원
    • Geotechnical Engineering
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    • v.12 no.5
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    • pp.117-126
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    • 1996
  • In spite of many advantages such as the simplicity in test procedure, Standard Penetration Test(SPT) results contain some errors caused by the variability of test equipment, instruments and test procedures. Especially, it is inevitable that the measured SPT hammer energy is different from the theoretical value because of energy loss. In this paper, the hammer energy level is measured during the performance of the field SPT in Korea by using a ultra-sonic system and PC.program. As the results of this study, the average hammer energy ratio of the R-P hammer and the Trip hammer is calculated at 64.2%, and at 75.0% respectively. The average energy ratio of the SPT for the R-P hammer is calculated at 46% and at 54% for the Trip hammer, by applying the rod energy ratio 0.72.

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Patient compliance with supportive periodontal therapy (유지 치주치료에 대한 환자 협조도 분석)

  • Lee, Hye-Won;Park, Jin-Woo;Suh, Jo-Young;Lee, Jae-Mok
    • Journal of Periodontal and Implant Science
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    • v.39 no.2
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    • pp.193-198
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    • 2009
  • Purpose: The purpose of this study was to evaluate the compliance to maintenance schedules recommended supportive periodontal therapy(SPT) and to determine differences in the characteristics of compliant and non-compliant patients. Methods: 414 patients commencing SPT after active periodontal treatment from 2003 to 2005 were included in this study. Based on their compliance with the suggested maintenance schedule, patients were classified as compliant and non-compliant groups. Also patients classified by gender, age, degree of alveolar bone loss and treatment rendered. The association between compliance and patient characteristics was assessed by odds ratio in logistic regression analyses. Results: Only 47% of the initial patient was found to be compliant at the end of August 2008 and 20.8% patients were lost in the first year of SPT. There were significant differences between compliant and non-compliant regard to age, degree of alveolar bone loss and treatment rendered. Conclusions: In conclusion, compliance with SPT generally poor and patients who were older, treated surgical therapy and with mild alveolar bone loss are more compliant to SPT.

F-18 FDG PET/CT Finding in Solid Pseudo-papillary Tumor of the Pancreas 6 years After Initial Diagnosis (췌장의 고형 가성유두상 종양 진단 6년 후의 F-18 FDG PET/CT 소견)

  • Choi, Byung-Wook;Kim, Hae-Won;Won, Kyoung-Sook;Zeon, Seok-Kil
    • Nuclear Medicine and Molecular Imaging
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    • v.43 no.6
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    • pp.577-581
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    • 2009
  • Solid pseudo-papillary tumor (SPT) is a rare pancreatic neoplasm with low malignant potential, which tends to occur predominantly in younger females. Only a few cases of SPT seen on F-18 FDG PET scan have been reported, and the findings are not fully evaluated. A 33 year-old woman underwent F-18 FDG PET/CT study for staging of renal cell carcinoma. She was diagnosed with SPT of the pancreas 6 years ago, and has not had any treatment so far. Recent PET/CT showed marked F-18 FDG uptake in the peripheral solid portion and relatively less F-18 FDG uptake to the central calcified portion of SPT. We report one case of SPT of the pancreas on F-18 FDG PET/CT.

Evaluation of KICT-type Large Penetration Test using Calibration Chamber System (Calibration Chamber System을 이용한 KICT-type LPT 장비의 거동분석)

  • Kim, Young-Seok;Kim, Young-Chin;Lee, Woo-Jin;An, Shin-Whan
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.1359-1364
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    • 2008
  • It is well known that the standard penetration test (SPT) has been used in all over the world to get geotechnical properties of the ground. However, it is difficult to apply the SPT to the dense sand, gravel, weathered rock, etc. For the application of the SPT in these grounds, it is necessary to change in the diameter and the impact energy of the SPT. For the improvement of site investigation technology, Large Penetration Testing device (KICT-type LPT) was developed and applied to the in situ condition. The drop height and weight of the hammer in developed system were decided as 760mm and 150kg, respectively. And the developed sampler has the inner diameter of 63 mm and the length of 500 mm with the adjustment of energy ratio to the SPT of 1.5. In this study, the performance of KICT-type LPT was evaluated by using a calibration chamber system and pile driving analyzer (PDA)

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The importance of SPT(Supportive Periodontal Therapy) for prevention of peri-implant disease (임상가를 위한 특집 1 - Peri-implant disease를 방지하기 위한 Supportive Periodontal Therapy(SPT)의 중요성)

  • Park, Su Jung
    • The journal of the Korean dental association
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    • v.51 no.12
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    • pp.630-636
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    • 2013
  • During the past decade, the use of osseointegrated implants as a foundation for prosthetic replacement of missing teeth has become highly predictable and successful. SPT(Supportive Periodontal Therapy) identified as regular visits to the therapist for periodontal control and maintenance in a well-organized scheme, the number of appointments per year following a pre-designed subject-tooth/implant-site risk assessment method. Peri-implant disease was a frequent finding in subjects having natural healthy dentition and in subjects without periodontitis. Supportive periodontal program were found to be strongly related to implant survival. This study demonstrates that regular maintenance reduces the risk for peri-implant inflammation significantly as compared with irregular maintenance. This underlines the value of the SPT in enhancing the long-term outcomes of implant therapy, particularly in subjects affected by periodontitis, in order to control reinfection and limit biological complications. It is highly recommended to maintain implant patients under a strict supportive periodontal treatment protocol that might contribute to implant survival, and regular maintenance reduces the risk for periimplant inflammation significantly as compared with irregular maintenance. Ideally, patients may be informed on the beneficial effect of a regular patient-related post-therapy care before implant insertion.

A Study on Correlation Interference Signal Cancellation Algorithm for Target Estimation in Multi Input Multi Output (다중 입력 다중 출력 배열 시스템에서 목표물 추정을 위한 상관성 간섭신호 제거 알고리즘 연구)

  • Lee, Kwan-Hyeong;Song, Woo-Young;Lee, Myeong-Ho
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.13 no.1
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    • pp.89-93
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    • 2013
  • This paper is estimating a target direction of arrival with incident to receiver in spatial. This paper presented covariance using constraint matrix to correlation interference signal cancellation in multi input multi output array antennas system. we proposed a target direction of arrival estimation algorithm using cost function and minimum variance method. Through simulation, we were analysis a performance to compare general SPT-LCMV algorithm and proposal algorithm. We showed that proposal algorithm improve more target estimation than general SPT-LCMV algorithm in direction of arrival.

Weak Lensing Analysis of the High-z Massive Galaxy Cluster SPT-CL J0205-5829 Using HST Data

  • Kim, Seojin F.;Jee, Myungkook J.
    • The Bulletin of The Korean Astronomical Society
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    • v.42 no.1
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    • pp.50.3-51
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    • 2017
  • Discovered in the South Pole Telescope Sunyaev-Zel'dovich (SPT-SZ) survey, the galaxy cluster SPT-CL J0205-5829 at z = 1.322 might be the most massive known SZ-selected galaxy cluster at z > 1.2. The SZ and X-ray combined mass estimate is $M500=(4.8{\pm}0.8){\times}10^{14}M_{\odot}$. To confirm this extreme mass, we perform weak lensing analysis of SPT-CL J0205-5829 using HST data. Our analysis produces a mass estimate consistent with the previous results obtained from non-lensing methods. In this poster, we describe details of the method including shape measurement, PSF correction, source selection, and mass estimation. We also present a two-dimensional mass map and compare this to the galaxy distribution.

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