Depositional and post‐depositional history of warm stage deposits at Knocknacran,Co. Monaghan,Ireland: implications for preservation of Irish last interglacial deposits     

A. P. M. Vaughan  L. A. Dowling  F. J. G. Mitchell  S.‐E. Lauritzen  A. M. McCabe  P. Coxon 《第四纪科学杂志》2004,19(6):577-590

Organic‐rich deposits, uncovered during overburden removal from mantled gypsum karst at Knocknacran opencast gypsum mine, Co. Monaghan, are the best candidate to date for a last interglacial record in Ireland. The two till and organic‐rich deposits (preserved at different quarry elevations) were emplaced on to a Tertiary dolerite surface during high‐energy flood events and subsequently folded and faulted by movement towards sinkholes in underlying gypsum. Uranium–thorium disequilibrium dating suggests that the organic‐rich deposits in the upper section were hydrologically isolated at ca. 41 ka and those in the lower section at ca. 86 ka. Interpretation of the pollen content, although tentative because of the depositional and post‐depositional history of the material, suggests that the organic material originated in a warm stage possibly warmer than the post‐Eemian interstadials. The unusual setting of preservation may indicate that in situ, last interglacial deposits have generally been removed by erosion in Ireland. Copyright © 2004 John Wiley & Sons, Ltd.  相似文献   

Changing People and Places: Editorship of the New Zealand Geographer, 1997–1999     

Richard Bedford  Robyn Longhurst  Robin Peace 《New Zealand geographer》1997,53(1):1-2

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Evelyn Stokes and Geography at the University of Waikato     

Richard Bedford  Robyn Longhurst Guest Editors 《New Zealand geographer》2005,61(2):87-88

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Out of place (Gwalia): occasional essays on Australian regional communities and built environments in transition     

Robyn Mayes 《The Australian geographer》2016,47(4):548-550

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Rapid subglacial streamlined bedform formation at a calving bay margin          下载免费PDF全文

Thomas P. F. Dowling  Per Möller  Matteo Spagnolo 《第四纪科学杂志》2016,31(8):879-892

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Quick algorithms for computing either displacement,velocity or acceleration of an oscillator     

J. L. Beck  M. J. Dowling 《地震工程与结构动力学》1988,16(2):245-253

Accurate and efficient algorithms are derived for computing any desired response quantity of a single-degree-of-freedom linear oscillator subjected to an arbitrary forcing function. These algorithms are based on linear interpolation of the excitation between discrete points sampled uniformly in time. In the special case of the undamped oscillator, the displacement algorithm is equivalent to a previously published algorithm for this situation which was derived using a finite element approach. However, contrary to the claim made by the authors of this latter algorithm, it does not give an exact solution of the equation of undamped motion for an arbitrary forcing function.  相似文献   

Discussion on a paper by J. L. Beck and M. J. Dowling     

V. W. Lee  J. L. Beck  M. J. Dowling 《地震工程与结构动力学》1988,16(8):1227-1231

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Response of jointed arches to earthquake excitation     

John F. Hall  Michael J. Dowling 《地震工程与结构动力学》1985,13(6):779-798

An efficient method for accurately modelling the gradual opening and closing of joints in two-dimensional slabs and arches has been devised. The method is used in computing the earthquake response of an arch which is a representative horizontal cross-section of a concrete arch dam. Responses of the arch with and without joints are compared to assess the effect of joint opening. An extension to three-dimensional arch dams is proposed.  相似文献   

Intermediate school's trip to India: Preparing for competence     

Robyn Andrews 《New Zealand geographer》2014,70(3):201-209

In November 2010, students from a Palmerston North intermediate school embarked on a 2‐week excursion to India. Qualitative research was carried out before, during and after the trip. Results discussed in this article focus primarily on the students' account of their trip, especially their perceived cultural competence and their explanation for it. Accounts of their competence are also offered by the parents and teachers, for example, they especially valued the students' extensive school‐based preparation. Insights gained from the experiences of this trip may be applied to other, including older, cohorts of students embarking on overseas school field trips.  相似文献   

Debris flows and their toll on human life: a global analysis of debris-flow fatalities from 1950 to 2011   总被引：1，自引：0，他引：1  

Casey A. Dowling  Paul M. Santi 《Natural Hazards》2014,71(1):203-227

Debris flows cause significant damage and fatalities throughout the world. This study addresses the overall impacts of debris flows on a global scale from 1950 to 2011. Two hundred and thirteen events with 77,779 fatalities have been recorded from academic publications, newspapers, and personal correspondence. Spatial, temporal, and physical characteristics have been documented and evaluated. In addition, multiple socioeconomic indicators have been reviewed and statistically analyzed to evaluate whether vulnerable populations are disproportionately affected by debris flows. This research provides evidence that higher levels of fatalities tend to occur in developing countries, characterized by significant poverty, more corrupt governments, and weaker healthcare systems. The median number of fatalities per recorded deadly debris flow in developing countries is 23, while in advanced countries, this value is only 6 fatalities per flow. The analysis also indicates that the most common trigger for fatal events is extreme precipitation, particularly in the form of large seasonal storms such as cyclones and monsoon storms. Rainfall caused or triggered 143 of the 213 fatal debris flows within the database. However, it is the more uncommon and catastrophic triggers, such as earthquakes and landslide dam bursts, that tend to create debris flows with the highest number of fatalities. These events have a median fatality count >500, while rainfall-induced debris flows have a median fatality rate of only 9 per event.  相似文献