• Title/Summary/Keyword: Cambridge University

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

  • Kang, Suk-Ho;Kang, Jae Myeong;Na, Kyoung-Sae;Koh, Seung-Hee;Cho, Seong-Jin;Kang, Seung-Gul
    • Sleep Medicine and Psychophysiology
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    • v.25 no.1
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    • pp.9-14
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    • 2018

  • Objectives: Chronic insomnia disorder is a common and one of the most distressing sleep disorders. This pilot study was conducted to compare the spatial function between insomnia disorder patients and good sleeping control. Methods: We enrolled the 22 patients with chronic insomnia during over one year who met the DSM-5 diagnostic criteria of insomnia disorder and 27 normal sleeping controls. The Cambridge Neuropsychological Test Automated Battery (CANTAB) has been performed to compare the spatial cognitive function between insomnia disorder patients and good sleeping controls. Results: The CANTAB results showed significant differences in the problems solved in minimum moves of Stockings of Cambridge test (t = -2.499, p = 0.017). The significant difference between two groups remained after controlling age, sex, and Beck Depression Index non-sleep scores (F = 5.631, p = 0.022). Conclusion: This study suggests that the patients with insomnia disorder have poor spatial planning function.

  • 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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    • v.15 no.3
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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
    • Proceedings of the Korean Geotechical Society Conference
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    • 1997.06c
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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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