• 제목/요약/키워드: Cambridge University

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불면장애 환자와 정상대조군간의 공간인지기능 비교 : 예비연구 (Comparison of Spatial Neurocognitive Function between Insomnia Disorder Patients and Normal Sleeping Control : Pilot Study)

  • 강석호;강재명;나경세;고승희;조성진;강승걸
    • 수면정신생리
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    • 제25권1호
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    • pp.9-14
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    • 2018

  • 연구목적 : 만성불면증은 흔하고 가장 환자들을 괴롭히는 수면장애들 중 하나이다. 본 예비연구는 불면장애 환자들과 수면을 잘 취하는 건강인 간에 공간인지기능을 비교하기 위해 수행되었다. 연구대상 및 방법 : DSM-5상 불면장애의 진단기준을 만족하는 22명의 만성 불면장애 환자와 27명의 수면을 잘 취하는 정상대조군이 연구에 참여하였다. 전산화신경인지기능검사인 Cambridge Neuropsychological Test Automated Battery (CANTAB)를 시행하여 불면장애 환자와 정상대조군 간에 공간인지기능(spatial planning function)을 비교하였다. 결 과 : CANTAB 결과 상 Stockings of Cambridge test에서 더 저조한 problems solved in minimum moves 결과를 보였다(t = -2.499, p = 0.017) 이 항목은 나이, 성별, beck depression index 비수면점수를 통제한 ANCOVA 분석에서도 유의한 결과를 보였다(F = 5.631, p = 0.017)의 유의한 차이가 관찰되었다. 결 론 : 본 연구의 결과는 불면장애 환자들의 저조한 공간계획기능을 시사한다.

  • https://doi.org/10.14401/KASMED.2018.25.1.9 인용 PDF KSCI

Performance monitoring of timber structures in underground construction using wireless SmartPlank

  • Xu, Xiaomin;Soga, Kenichi;Nawaz, Sarfraz;Moss, Neil;Bowers, Keith;Gajia, Mohammed
    • Smart Structures and Systems
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    • 제15권3호
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    • pp.769-785
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    • 2015

  • Although timber structures have been extensively used in underground temporary supporting system, their actual performance is poorly understood, resulting in potentially conservative and over-engineered design. In this paper, a novel wireless sensor technology, SmartPlank, is introduced to monitor the field performance of timber structures during underground construction. It consists of a wooden beam equipped with a streamlined wireless sensor node, two thin foil strain gauges and two temperature sensors, which enables to measure the strain and temperature at two sides of the beam, and to transmit this information in real-time over an IPv6 (6LowPan) multi-hop wireless mesh network and Internet. Four SmartPlanks were deployed at the London Underground's Tottenham Court Road (TCR) station redevelopment site during the Stair 14 excavation, together with seven relay nodes and a gateway. The monitoring started from August 2013, and will last for one and a half years until the Central Line possession in 2015. This paper reports both the short-term and long-term performances of the monitored timber structures. The grouting effect on the short-term performance of timber structures is highlighted; the grout injection process creates a large downward pressure on the top surface of the SmartPlank. The short and long term earth pressures applied to the monitored structures are estimated from the measured strains, and the estimated values are compared to the design loads.

  • https://doi.org/10.12989/sss.2015.15.3.769 인용 KSCI

Some Influences of Anisotropy in Clay Soil and Rocks

  • R.H.G.Parry
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 1997년도 Lecture Notes by Two Distinguished Scholars
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    • pp.1.2-22
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    • 1997

  • Anisotropic behaviour in soils and soft rocks may be either fabric of stress related ultra in practice is invariably a combination of both. Theoretical studies in the paper include tile iMluence oil untrained strength of assuming both the critical state and Mo21r-Coulomb concepts to hold, and the influence of elastic anisotropy oil predicted undrained effective stress paths. The predictions stemming from these theoretical concepts are examined in the light of evidence from triaxial compression and extension tests oil laboratory prepared, compacted and natural clays and from triaxial compression tests on clay shales. The experimental studies also show the Buence of sample orientation on untrained snear strength, as wen as the iIBluence of anisotropy old the effective stress angle cishearing resistance and of stress patn on measured stiffness.

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