Did the Kyrenia Range of northern Cyprus rotate with the Troodos–Hatay microplate during the tectonic evolution of the eastern Mediterranean?     

Antony Morris  Alastair H. F. Robertson  Mark W. Anderson  Emma Hodgson 《International Journal of Earth Sciences》2016,105(1):399-415

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Isolation basin stratigraphy and Holocene relative sea-level change on Arveprinsen Ejland,Disko Bugt,West Greenland     

Antony J. Long  David H. Roberts  Matthew R. Wright 《第四纪科学杂志》1999,14(4):323-345

This paper presents the results of an investigation into Holocene relative sea-level (RSL) change, isostatic rebound and ice sheet dynamics in Disko Bugt, West Greenland. Data collected from nine isolation basins on Arveprinsen Ejland, east Disko Bugt, show that mean sea level fell continuously from ca. 70 m at 9.9 ka cal. yr BP (8.9 ka ¹⁴C yr BP) to reach a minimum of ca. −5 m at 2.8 ka cal. yr BP (2.5 ka ¹⁴C yr BP), before rising to the present day. A west–east gradient in isostatic uplift across Disko Bugt is confirmed, with reduced rebound observed in east Disko Bugt. However, RSL differences (up to 20 m at 7.8 ka to 6.8 ka cal. yr BP (7 ka to 6 ka ¹⁴C yr BP)) also exist within east Disko Bugt, suggesting a significant north–south component to the area’s isostatic history. The observed magnitude and timing of late Holocene RSL rise is not compatible with regional forebulge collapse. Instead, RSL rise began first in the eastern part of the bay, as might be expected under a scenario of crustal subsidence caused by neoglacial ice sheet readvance. The results of this study demonstrate the potential of isolation basin data for local and regional RSL studies in Greenland, and the importance of avoiding data compilations from areas where the isobase orientation is uncertain. Copyright © 1999 John Wiley & Sons, Ltd.  相似文献   

Alluvial records of medieval and prehistoric tin mining on Dartmoor,southwest England     

Varyl R. Thorndycraft  Duncan Pirrie  Antony G. Brown 《Geoarchaeology》2004,19(3):219-236

The role of tin mining in the society of prehistoric Dartmoor and its impact on the local landscape have long been discussed despite equivocal evidence for prehistoric mine sites. A fluvial geomorphological approach, using floodplain stratigraphy, combined with sediment geochemistry and mineralogy, was employed to identify prehistoric tin mining at the catchment scale. Waste sediment, released during hydraulic mining of alluvial tin deposits, caused downstream floodplain aggradation of sands with a diagnostic signature of elevated Sn concentration within the silt fraction. At a palaeochannel site in the Erme Valley, sediment aggradation buried datable peat deposits. A period of aggradation postdating cal. A.D. 1288–1389 is consistent with the 13th century peak in tin production identified in the documentary record. An earlier phase of aggradation, however, occurred between the 4th and 7th centuries A.D., providing evidence of late Roman or early Post Roman tin mining activity on Dartmoor. © 2004 Wiley Periodicals, Inc.  相似文献   

Electrochemical Degradation of Remazol Black B Dye Effluent     

Poppana Antony Soloman  Chiya Ahmed Basha  Manickam Velan  Veerappan Ramamurthi  Kandasamy Koteeswaran  Natesan Balasubramanian 《洁净——土壤、空气、水》2009,37(11):889-900

This study focused on the electrochemical degradation of hydrolyzed Remazol Black B (CI Reactive Black 5), a common diazo reactive dye, in aqueous solution. In the presence of various auxiliary dye chemicals, a typical Remazol Black simulated exhausted dyebath liquor was treated electrochemically in various basic electrochemical reactor configurations such as batch, batch recirculation and single pass systems. The effect of current density, supporting electrolyte concentration, electrolysis duration, specific electrode surface and fluid flow rate on pollutant removal and energy consumption performance of the systems was critically evaluated. Batch studies show the following operating parameters, current density: 2.5 A/dm², electrolysis duration: 6 h, and supporting electrolyte concentration: 3 g/L, were optimal for good overall performance of the system. Color removal was complete by 3 h of treatment for all combinations of parameters studied. The pollutant removal performance of the batch recirculation system was found to have improved considerably by increasing the flow rate. Performance of the batch recirculation system was comparatively better than the other rector configurations studied, with respect to capacity utilization and energy consumption.  相似文献   

A buffered impact damper for multi‐degree‐of‐freedom structural control     

Kuinian Li  Antony P. Darby 《地震工程与结构动力学》2008,37(13):1491-1510

The results of an experimental investigation into the use of a buffered impact damper for controlling the dynamic response of an MDOF (multi‐degree‐of‐freedom) structure are presented in this paper. Free and forced vibration tests of a three‐DOF test structure equipped with a buffered impact damper are performed to evaluate the resulting damping effect and impact characteristics. The effect of damper parameters, such as clearance, and excitation type on the performance of the impact damper is also investigated. The performance of the buffered impact damper is compared with that of an equivalent conventional rigid impact damper. It is found that the buffered impact damper not only significantly reduces the peak contact force and the associated accelerations and noise generated by collisions but can also substantially enhance the damping effect over a wide range of frequencies, encompassing the natural frequencies of the test structure. Copyright © 2008 John Wiley & Sons, Ltd.  相似文献   

The impact of gentrification on residential evictions     

Antony Chum 《Urban geography》2013,34(7):1083-1098

Gentrification, a process of transforming working-class areas into middle-class use, is a pervasive process in many cities around the world. Although researchers recognize the dangers of displacement in this process, the magnitude of dislocation is highly contested. Literature on gentrification offers little guidance with regard to understanding the timing of displacement in a gentrifying neighborhood. Moreover, evictions have been neglected as a form of gentrification-led displacement, which may have led to underestimating displacement effects. This study sheds light on the geography of displacement through an analysis of 59,415 eviction applications in the City of Toronto from 1999 to 2001, which are compared with the timing of gentrification at the census tract level (n = 502). The study finds that evictions are positively associated with (1) neighborhoods in early stages of gentrification, and (2) “pre-gentrified neighborhoods” that are beginning to be marked by changes in social composition, that is, an increasing number of artists and people with higher education, but no significant increase yet in aggregate income or the number of owner-occupied dwellings. By illuminating the timing and magnitude of displacement in gentrifying neighborhoods, this study fosters a better understanding of gentrification outcomes that may inform policies to ameliorate its negative impacts.  相似文献   

THE UNUSUAL STORMS OF FEBRUARY 1992 IN SOUTHERN CALIFORNIA     

Marilyn Raphael  Johannes Feddema  Amalie J. Orme  Antony R. Orme 《自然地理学》2013,34(5):442-464

During February 1992, a series of relatively warm storms passed eastward across southern California, yielding intense precipitation that triggered widespread mass movement, flooding, property damage, and loss of life. These storms were triggered by an intense low pressure system (976 mb) off northern California which deepened as its eastward progress was initially blocked by a high pressure ridge (1040 mb) across western North America. Between February 10 and 13, large areas of Ventura and Los Angeles counties experienced cumulative precipitation of 200–400 mm with intensities reaching 40–50 mm hr^-1. Mass movement, mainly as soil slips that transformed downslope into debris flows, occurred where cumulative precipitation exceeded 300 mm and when sustained intensities exceeded 25 mm hr^-1. Stream response was rapid, particularly in urban areas where impermeable surfaces and storm drains fed concrete stream channels. The canalized upper Los Angeles River and Arroyo Simi exceeded all previous discharges for over 43 and 36 years of record, respectively. Other streams, from the large Santa Clara River to modest Malibu Creek, yielded recurrence intervals for the peak discharge of between 8 and 24 years, but the rapidity of flooding everywhere was remarkable. Whereas main trunk streams, canalized or not, responded predictably, the storm series emphasized the problems of poorly controlled development of potentially unstable hillsides and floodable lowlands and indicated a need to reassess the assumptions upon which such development is permitted. [Key words: climatology, cyclonic storm, geomorphology, mass movement, flooding, California].  相似文献   

An initial formal model for spatial data infrastructures     

Jan Hjelmager  Harold Moellering  Antony Cooper  Tatiana Delgado  Abbas Rajabifard  Petr Rapant 《International journal of geographical information science》2013,27(11-12):1295-1309

The Commission on Spatial Data Standards of the International Cartographic Association is working to define formal models and technical characteristics of Spatial Data Infrastructures (SDI). To date, this work has been restricted to the Enterprise and Information Viewpoints from the ISO Reference Model for Open Distributed Processing standard. The Commission has developed models for these two viewpoints. These models describe how the different parts of an SDI fit together in the viewpoints in question. These models should be seen as a contribution towards the overall model of the SDI and its technical characteristics. During the model development process, the roles of the different Actors in an SDI in the Enterprise and Information Viewpoints have also been identified in Use Case diagrams of an SDI. All the models have been developed using the Unified Modeling Language.  相似文献   

Palaeoecological,archaeological and historical data and the making of Devon landscapes. I. The Blackdown Hills     

Antony G. Brown  Charlotte Hawkins  Lucy Ryder  Sean Hawken  Frances Griffith  Jackie Hatton 《Boreas: An International Journal of Quaternary Research》2014,43(4):834-855

This paper presents the first systematic study of the vegetation history of a range of low hills in SW England, UK, lying between more researched fenlands and uplands. After the palaeoecological sites were located bespoke archaeological, historical and documentary studies of the surrounding landscape were undertaken specifically to inform palynological interpretation at each site. The region has a distinctive archaeology with late Mesolithic tool scatters, some evidence of early Neolithic agriculture, many Bronze Age funerary monuments and Romano‐British iron‐working. Historical studies have suggested that the present landscape pattern is largely early Medieval. However, the pollen evidence suggests a significantly different Holocene vegetation history in comparison with other areas in lowland England, with evidence of incomplete forest clearance in later‐Prehistory (Bronze?Iron Age). Woodland persistence on steep, but poorly drained, slopes, was probably due to the unsuitability of these areas for mixed farming. Instead they may have been under woodland management (e.g. coppicing) associated with the iron‐working industry. Data from two of the sites also suggest that later Iron Age and Romano‐British impact may have been geographically restricted. The documented Medieval land management that maintained the patchwork of small fields, woods and heathlands had its origins in later Prehistory, but there is also evidence of landscape change in the 6th–9th centuries AD. We conclude that the Blackdown Hills area was one of many ‘distinctive subregions’, which due to a combination of edaphic, topographic and cultural factors could qualify as an eco‐cultural region or ‘pays’. It is argued that the use of such eco‐culturally distinctive regions or pays can provide a spatial and archaeological framework for palaeoecology, which has implications for landscape research, designation and heritage management.  相似文献   

Geotechnical Investigation for Resort Construction Using Resistivity and Granulometric Studies in Pattinamaruthur Coast,Southern India     

A. Antony Ravindran  N. C. Mondal 《Geotechnical and Geological Engineering》2015,33(5):1335-1350

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