Full‐scale shaking table test of a base‐isolated medical facility subjected to vertical motions     

Sachi Furukawa  Eiji Sato  Yundong Shi  Tracy Becker  Masayoshi Nakashima 《地震工程与结构动力学》2013,42(13):1931-1949

Base isolation is a well known technology that has been proven to reduce structural response to horizontal ground accelerations. However, vertical response still remains a topic of concern for base‐isolated buildings, perhaps more so than in fixed‐base buildings as isolation is often used when high performance is required. To investigate the effects of vertical response on building contents and nonstructural components, a series of full‐scale shaking table tests were conducted at the E‐Defense facility in Japan. A four‐story base‐isolated reinforced concrete building was outfitted as a medical facility with a wide variety of contents, and the behavior of the contents was observed. The rubber base isolation system was found to significantly amplify vertical accelerations in some cases. However, the damage caused by the vertical ground motions was not detrimental when peak vertical floor accelerations remained below 2 g with three exceptions: (1) small items placed on shelves slid or toppled; (2) objects jumped when placed on nonrigid furniture, which tended to increase the response; and (3) equipment with vertical eccentricities rocked and jumped. In these tests, all equipment and nonstructural components remained functional after shaking. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

Sampling strategies to evaluate the status of offshore soft sediment assemblages     

Rogers SI  Somerfield PJ  Schratzberger M  Warwick R  Maxwell TA  Ellis JR 《Marine pollution bulletin》2008,56(5):880-894

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Microbial populations in contaminant plumes   总被引：4，自引：1，他引：3  

Sheridan K. Haack  Barbara A. Bekins 《Hydrogeology Journal》2000,8(1):63-76

Received, May 1999/Revised, October 1999/Accepted, October 1999  相似文献   

Cl,Br and I analyses of metamorphic and sedimentary rocks by isotope dilution mass spectrometry     

M. Boneß  K. G. Heumann  U. Haack 《Contributions to Mineralogy and Petrology》1991,107(1):94-99

Isotope dilution mass spectrometry with negative thermal ions was applied to determine Cl, Br and I in rocks which, in part, contained less than 100 ppb of Br and I. Two sets of samples have been investigated: a) a series of Al-rich metapelites of increasing metamorphic grade from the Damara Orogen, Namibia and b) fresh and hydrothermally altered greywackes from the Pb−Zn deposit Bad Grund in Germany. It was found that regional metamorphism of Al-rich metapelites causes no strong fractionation of the halides. The Br/Cl ratios in the metapelites are similar to those of sea water. The I/Cl and I/Br ratios, however, are 500 times higher. The I depleted in the ocean most probably is associated with organic matter stored in sediments. The unaltered greywackes from near the Pb−Zn vein have about the same concentrations of halides as the metamorphic Al-rich pelites. By contrast, the hydrothemally altered greywackes contain about twice as much Cl and I, and about 2–5 times as much Br as the unaltered samples. The element ratios, however, are similar for all three categories of rocks, thereby indicating that sea water played no role in the hydrothermal system.  相似文献   

Book reviews     

Geoffrey Abers  Robert D. Cicerone  Douglas J. Galpin  William Power  Tracy Rushmer  J. Leliwa-Kopystynski  Krzysztof Haman  Daniel Wójcik  Michal Herbich  Bogumil Jakubiak  Szymon P. Malinowski 《Pure and Applied Geophysics》1996,147(3):585-610

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Radar speckle reduction and derived texture measures for land cover/use classification: a case study     

Terry Idol  Barry Haack 《国际地球制图》2017,32(1):18-29

This study examined the appropriateness of radar speckle reduction for deriving texture measures for land cover/use classifications. Radarsat-2 C-band quad-polarised data were obtained for Washington, DC, USA. Polarisation signatures were extracted for multiple image components, classified with a maximum-likelihood decision rule and thematic accuracies determined. Initial classifications using original and despeckled scenes showed despeckled radar to have better overall thematic accuracies. However, when variance texture measures were extracted for several window sizes from the original and despeckled imagery and classified, the accuracy for the radar data was decreased when despeckled prior to texture extraction. The highest classification accuracy obtained for the extracted variance texture measure from the original radar was 72%, which was reduced to 69% when this measure was extracted from a 5 × 5 despeckled image. These results suggest that it may be better to use despeckled radar as original data and extract texture measures from the original imagery.  相似文献   

Geochemical tables | H.J. Rösler and H. Lange, 1972. Elsevier,Amsterdam, 468 pp., Dfl. 80.00     

V. Haack 《Earth》1974,10(1):80-81

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Is being in work good for wellbeing? Work Integration Social Enterprises in regional Australia     

Katharine McKinnon  Melissa Kennedy  Jo Barraket  Tracy DeCotta 《The Australian geographer》2020,51(3):361-375

ABSTRACT

Work Integration Social Enterprises (WISE) offer supported work environments for people experiencing disadvantage, including people with disability. This paper reflects on a research project that is mapping the ways in which social enterprises in regional Australian cities produce wellbeing for their employees. Through supported employment programs, these organisations are transforming individual lives, helping to build a sense of self-worth and purpose, and increase individuals’ social skills and capacities. Many of the perceived benefits are associated with a belief in the innate good of paid work. Based upon interviews with employees in the social enterprises, it is apparent that the hopes attached to providing ‘meaningful work’ are considerable. At the same time social enterprises are taking on social responsibilities that were once provided by the state, while also selling their services as employers of disabled and disadvantaged members of society and maintaining commercial viability of the enterprise. Using feminist political economy alongside discussion of the distributive economy, this paper explores how contemporary policy conditions, productivist biases and normative discourses about the value of wage work inflect the forms of wellbeing that can be experienced by WISE workers.  相似文献   

Thermal structure and tectonic evolution of the Scandian orogenic wedge,Scottish Caledonides: integrating geothermometry,deformation temperatures and conceptual kinematic‐thermal models     

J.R. Thigpen  R.D. Law  C.L. Loehn  R. A. Strachan  R.J. Tracy  G.E. Lloyd  B.L. Roth  S.J. Brown 《Journal of Metamorphic Geology》2013,31(8):813-842

In the Caledonides of northwest Scotland, two independent geothermometers (Fe‐Mg exchange and quartz c‐axis fabric opening angle) are used to characterize the thermal structure of the lower part of the Scandian (435–420 Ma) orogenic wedge within the Moine, Ben Hope and Naver‐Sgurr Beag thrust sheets. Traced from west (foreland) to east (hinterland), Fe‐Mg exchange thermometry yields peak or near‐peak temperatures ranging from 484 ± 50 °C to 524 ± 50 °C in the immediate hangingwall of the Moine thrust to 601 ± 50 °C in the immediate hangingwall of the Ben Hope thrust, to 630 ± 50 °C in the Naver thrust sheet. Preserved metamorphic facies and textural relationships are consistent with thermometric estimates. Deformation temperatures calculated from quartz c‐axis fabric opening angles across two similar orogen‐perpendicular transects also yield systematic increases (Glen Golly – Ben Klibreck, 520–630 °C; Ullapool‐Contin, 465–632 °C) traced towards the Naver and Sgurr Beag thrusts. In addition, deformation temperatures show a pronounced increase along the leading edge of the Moine thrust sheet moving south towards the Assynt window, which is interpreted to reflect deeper exhumation of the thrust plane above the Assynt footwall imbricate stack. Because temperatures calculated from metamorphic assemblages are within error of the quartz fabric‐derived deformation temperatures that are of demonstrably Scandian age, the metamorphic sequence between the Moine and Naver‐Sgurr Beag thrusts is interpreted to have developed during the Scandian orogeny. Integration of our results with previous 2D thermal‐mechanical studies allows development of new conceptual thermal‐kinematic models of Scandian orogenesis that may be broadly applicable to other collisional systems. Furthermore, it highlights the critical nature of coupling between orogen kinematic and thermal evolution.  相似文献   

The Meteoritical Bulletin,No. 96, September 2009     

Michael K. Weisberg  Caroline Smith  Gretchen Benedix  Christopher D. K. Herd  Kevin Righter  Henning Haack  Akira Yamaguchi  Hasnaa Chennaoui Aoudjehane  Jeffrey N. Grossman 《Meteoritics & planetary science》2009,44(9):1355-1397

Abstract— The Meteoritical Bulletin No. 96 contains a total of 1590 newly approved meteorite names with their relevant data. These include 12 from specific locations within Africa, 76 from northwest Africa, 9 from the Americas, 13 from Asia, 1 from Australia, 2 from Europe, 950 from Antarctica recovered by the Chinese Antarctic Research Expedition (CHINARE), and 527 from the American Antarctic program (ANSMET). Among these meteorites are 4 falls, Almahata Sitta (Sudan), Sulagiri (India), Ash Creek (United States), and Maribo (Denmark). Almahata Sitta is an anomalous ureilite and is debris from asteroid 2008 TC3 and Maribo is a CM2 chondrite. Other highlights include a lunar meteorite, a CM1 chondrite, and an anomalous IVA iron.  相似文献