1,101 research outputs found
PREFACE – ISPRS WORKSHOP ON ADVANCED GEOSPATIAL APPLICATIONS FOR SMART CITIES AND REGIONS (SMARTGEOAPPS 2019)
Full text link10.5194/isprs-annals-IV-2-W5-501-2019ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.IV-2/W5501-50
Supplemental Material: Astronomically forced paleoclimate and sea-level changes recorded in the continental margin of the South China Sea over the past ~23 m.y.
No full textAstronomically forced paleoclimate and sea-level changes recorded in the continental margin of the South China Sea over the past ~ 23 m.y.</p
Segmentation and crustal structure of the western Mid-Atlantic Ridge flank, 25°25′–27°10′N and 0–29 m.y.
Full text linkAuthor Posting. © American Geophysical Union, 1997. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 102, no. B5 (1997): 10203–10223, doi:10.1029/96JB03896.We conducted a detailed geological-geophysical survey of the west flank of the Mid-Atlantic Ridge between 25°25′N and 27°10′N and from the ridge axis out to 29 Ma crust, acquiring Hydrosweep multibeam bathymetry, HAWAII MR1 sidescan-sonar imagery, gravity, magnetics, and single-channel seismic reflection profiles. The survey covered all or part of nine spreading segments bounded by mostly nontransform, right-stepping discontinuities which are subparallel to flow lines but which migrated independently of one another. Some discontinuities alternated between small right- and left-stepping offsets or exhibited zero offset for up to 3–4 m.y. Despite these changes, the spreading segments have been long-lived and extend 20 m.y. or more across isochrons. A large shift (∼9°) in relative plate motion about 24–22 Ma caused significant changes in segmentation pattern. The nature of this plate-boundary response, together with the persistence of segments through periods of zero offset at their bounding discontinuities, suggest that the position and longevity of segments are controlled primarily by the subaxial position of buoyant mantle diapirs or focused zones of rising melt. Within segments, there are distinct differences in seafloor depth, morphology, residual mantle Bouguer gravity anomaly, and apparent crustal thickness between inside-corner and outside-corner crust. This demands fundamentally asymmetric crustal accretion and extension across the ridge axis, which we attribute to low-angle, detachment faulting near segment ends. Cyclic variations in residual gravity over the crossisochron run of segments also suggest crustal-thickness changes of at least 1–2 km every 2–3 m.y. These are interpreted to be caused by episodes of magmatic versus relatively amagmatic extension, controlled by retention and quasiperiodic release of melt from the upwelling mantle. Detachment faulting appears to be especially effective in exhuming lower crust to upper mantle at inside corners during relatively amagmatic episodes, creating crustal domes analogous to “turtleback” metamorphic core complexes that are formed by low-angle, detachment faulting in subaerial extensional environments.This research was supported by ONR grants N00014-90-J-1621 and N00014-94-1-0466 and NSF grant OCE-9300708
The Currency and Change of Compendia of Model Writings of Wang XiZhi（集王羲之行書）in Northern Song Dynasty
No full text本文以「集王羲之行書」（以下簡稱「集王行書」）為風格脈絡，討論該書風在北宋的流傳情形。若以題跋文字與傳世墨跡來研究，「集王行書」在此期的樣貌無法完全呈現。然而藉由金石書籍與石刻史料的運用，可以勾勒出「集王行書」在此期的流變。筆者用「集王行書」而不用僧懷仁〈集字聖教序〉這一作品，主要是從北宗的金石書籍與題跋文字無法得知當時有影響力的文人見過僧懷仁〈集字聖教序〉，但見過「集王行書」，「集王行書」大量出現在北宋的金石著錄而非題跋文字，這和石刻書跡的傳真性不足以作為書法的學習，因此不被北宋文人接受有關。最後藉由石刻史料的運用，勾勒出 「集王行書」在北宋的流 行脈絡 。在宋真 朝以前和唐代的關 係密切，分別存在於佛教系統與宮廷系統，且書風無 太大改變。唐代宮廷系統的「集王行書」用於皇室墓誌；北宋宮廷系統的「集王行書」，又稱「院體」，用於對外的官方文告。宋哲宗朝以後， 佛教系統消失；宮廷系統的「院體」產生了變化，這 和院體書吏由伎術官轉換成士流的 管道，從北宋真宗 至神宗朝逐次削減有相當的影響 。This essay discusses the development of Compendia of Model Writings of Wang XiZhi in the Northern Song dynasty (960-1126) based on its context. However, images of this style cannot be seen from the colophons or the hand writings which still remain nowadays, but directly through the books of Epigraphy and stone carving, we can draw the contour of the currency and change of Compendia of Model Writings of Wang XiZhi. From the colophons there is no proof that any of the literati who had great influence on calligraphy had seen“Preface to Sacred Teachings”（集字聖教序）, so the author uses the term Compendia of Model Writings of Wang XiZhi instead of “Preface to Sacred Teachings”, but it is known that they had seen Compendia of Model Writings of Wang XiZhi. This essay first intends to discuss if Compendia of Model Writings of Wang
XiZhi and“Preface to Sacred Teachings” have the same concept of style. Secondly, this essay intends to explain why Compendia of Model Writings of Wang XiZhi appeared in the Northern Song Epigraphy documents but did not appear in the colophons of the same period. This is related to their writing style. Compendia of Model Writings of Wang XiZhi belongs to stone carving, and to copy or use that style as the model of calligraphy learning was not accepted by the Northern Song literati. The author then uses the historical materials from stone carvings to describe the trend of using or learning Compendia of Model Writings of Wang XiZhi in the Northern Song dynasty. Before the rein of Emperor Zhenzong (998-1022), there had been an intimate relationship with Tang Dynasty style, the style that had been practiced separately for Buddhist writing and also court writing, and this style didn’t change much. After the rein of Emperor Zhezong (1086-1100), it disappeared from Buddhism writing, and
Compendia of Model Writings of Wang XiZhi in court, known as “academy style (Yuanti)” had changed. The reason for this change was that the channel of becoming scholar-officials from the skilled officials changed during the rein of Emperor Zhenzong to Shenzong (1023-1085) with fewer high officials drawn from the ranks of the court writing officials
Writings and Publications of the French Nobility under the Absolute Monarchy: La Rochefoucauld's <i>Maximes morales</i> and his Readers' Responses
No full text在法國17世紀尚文著述的佩劍貴族中，曾經參與投石黨運動、對抗王權的拉侯什傅科公爵（Fran?ois VI de la Rochefoucauld, duc et pair de France, 1613-1680），是文學史上經典之作《道德箴言錄》（Maximes morales）的作者。本文嘗試重建拉氏的政治經驗，和其書寫與出版實踐之間的連結關係，指出絕對王權對於貴族用以界定與鞏固同盟關係與恩庇扈從體系之倫理道德的破壞，為拉氏省視個人政治經驗的核心關懷。本文同時透過分析讀者對於《道德箴言錄》的迴響與挪用，檢視17世紀下半葉貴族社群與王權不斷調整的互動與對話關係，並勾勒《道德箴言錄》自17世紀首次出版到18世紀百年之間意義變遷的閱讀史圖像。Among the French nobles of the Sword who engaged in literary writings, the Duke of La Rochefoucauld, former member of the Fronde against the monarchy, was the author of the literary classic, Maximes morales. This article intends to build the connection which existed between the political experiences of La Rochefoucauld and his practices in writing and publication. Duke criticized that the Absolute Monarchy destroyed the ethics which the nobility had used to define and strengthen the relationship of alliance as well as of patron-client. By analyzing the responses and appropriations of the readers of Maximes morales, especially the Parisian elite, this article depicts not only the interaction and dialogue established between the aristocratic community and the monarchy under the rule of Louis XIV, but also a history of reading in which the meaning of Maximes morales shifted from its first publication in the seventeen-century to the eighteenth-century
Modal wavefront correctors based on nematic liquid crystals
No full textModal wavefront correctors are active optical components for the compensation of aberrated optical wavefronts in a smooth and continuous way. They are traditionally represented by membrane and continuous faceplate deformable mirrors. This thesis is dedicated to the investigation and development of modal wavefront correctors based on nematic liquid crystals. The thesis introduces a new method for evaluating the average static correction performance of a wavefront corrector applied to compensation of random phase aberrations. Statistics of the random wavefronts are described by Kolmogorov's theory. The method allows a comparison of the static correction performances of different types of deformable mirrors and different actuator structures. A range of modal liquid crystal (LC) devices is considered, including adaptive spherical and cylindrical LC lenses and three different types of multi-element wavefront correctors. The research is focused on electro-optics of the devices, consideration of potentially useful control modes, development of algorithms of optimization and control, and alternative technologies for modal addressing of LCs. A control algorithm and software have been developed for a system for practical calibration of modal LC lenses. Feasibility of control using several degrees of freedom per actuator is demonstrated for both adaptive LC lenses and multi-element modal wavefront correctors. Two new approaches to forming of the modal-type phase profiles in LC layers are considered. The first one is based on spreading of the electric field in a thick dielectric substrate and the second one is based on a passive resistive network formed in a semiconductor silicon substrate. These approaches are illustrated with practically implemented devices. Comparison of the new technologies to a previously studied one is presented.Electrical Engineering, Mathematics and Computer Scienc
Broken Even-Odd Symmetry in Self-Selection of Distances between Nanoclusters due to the Presence or Absence of Topological Solitons
No full textAssessing people travel behavior using GPS and open data to validate neighbourhoods characteristics
No full textWith the help of technologies such as GPS tracks, GIS and open data is now possible to study people travel behaviour in a new way. Nowadays, large datasets can be easily handled thanks to databases and better visualized using GIS. Moreover, the availability of GPS data, open data and VGI makes accessible a lot of new information, which was not obtainable before. This research is about the analysis of mobility patterns in different neighbourhoods in three cities in the Netherlands. The study is based on the validation of mobility theoretical performances by the actual performances measured through the analysis of GPS logs of households, who live in the neighbourhoods. A series of spatial indicators based on proximity, density and accessibility are computed in order to assess the theoretical performances of the neighbourhoods. To achieve this task, information about built environment characteristics and infrastructure networks is retrieved from OpenStreetMap, and other datasets. In the end the neighbourhoods are classified into five classes, according to the different levels of performances in terms of sustainable mobility. In such a way, it is possible to better understand the key factors that influence actual people travel patterns, providing policy makers with accurate information about the real movement of people.OLD Urban DesignOLD Department of GIS Technolog
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