The shoreline is one of the rapidly changing landforms in coastal areas. They are the key element in coastal GIS and provide the most information on coastal land form dynamics. Therefore, accurate detection and freque...The shoreline is one of the rapidly changing landforms in coastal areas. They are the key element in coastal GIS and provide the most information on coastal land form dynamics. Therefore, accurate detection and frequent monitoring of shorelines is very essential to understand the coastal processes and dynamics of various coastal features. The present study is to investigate the shoreline changes along the coast between Kanyakumari and Tuticorin of south India （where hydrodynamic and morphologic changes occur continuously after the December 2004 tsunami） by using Digital Shoreline Analysis System （DSAS）, an extension of ArcGIS. Multidate 1RS and Landsat Satellite data （1999, 2001, 2003, 2005, 2007, and 2009） are used to extract the shorelines. The data is processed by using the ERDAS IMAGINE 9.1 software and analyzed by ArcGIS 9.2 workstation. The rates of shoreline changes are estimated by three statistical methods, namely, End Point Rate （EPR）, Linear Regression Rate （LRR）, and Least Median of Squares （LMS） by using DSAS. The study reveals that most of the study area has undergoing erosion. Both natural and anthropogenic processes along the coast modify the shoreline configuration and control the erosion and accretion of the coastal zones. The coastal zones along the estuary have experienced accretion due to the littoral processes. The zones with headlands have more eroded than other zones along the study area. The study also shows that the coastal zones where sand is mined have relatively more rate of erosion than that of the other zones. Improper and unsustainable sand mining may also lead to severe erosion problem along this area. The shoreline change rates are altered by various geological processes along the coast. Thus, the present study implies that proper beach filling and nourishment projects should be made in the study area to save from hazards. It also indicates the advantage and suitability of DSAS to assess the shoreline changes compared with the traditional manual shoreline 展开更多
本刊2007年曾就中国远程教育工作者关心的马里兰学院大学（University Of Maryland UniversityCollege＊，以下简称“UMUC”）的远程教育质量保证、教师队伍建设和在线学习课程管理等话题采访了UMUC校长Susan C. Aldridge博士，以及该...本刊2007年曾就中国远程教育工作者关心的马里兰学院大学（University Of Maryland UniversityCollege＊，以下简称“UMUC”）的远程教育质量保证、教师队伍建设和在线学习课程管理等话题采访了UMUC校长Susan C. Aldridge博士，以及该校负责远程教育硕士学位（Master of Distance Educa-tion,以下简称“MDE”）课程的Stella C. S. Porto博士。展开更多
Reduction and Given’ess written by J.L.Marion, is to study Husserl, Heidegger and Phenomenology. The key in the book is whether it is the destiny of phenomenology to return to “things in themselves”. Marion’s unde...Reduction and Given’ess written by J.L.Marion, is to study Husserl, Heidegger and Phenomenology. The key in the book is whether it is the destiny of phenomenology to return to “things in themselves”. Marion’s understanding shows a “Givenness phenomena” beyond being. It looks like the love without being and opens to study the phenomenology of Givenness. Marion points out that, according to Husserl, essence and existence are not the really different principles but the two modes of being in two modes of self-givenness. For Marion, phenomenology is concerned not with objects or even being, but with givenness. Marion’s explanation offers a kind of attractive reduction for phenomenology.展开更多
基金Supported by the Natural Resources Data Management System,Department of Science and Technology,Government of India Under Project Scheme (No.ES/11/546/2000,No.ES/11/936(5)/05)
文摘The shoreline is one of the rapidly changing landforms in coastal areas. They are the key element in coastal GIS and provide the most information on coastal land form dynamics. Therefore, accurate detection and frequent monitoring of shorelines is very essential to understand the coastal processes and dynamics of various coastal features. The present study is to investigate the shoreline changes along the coast between Kanyakumari and Tuticorin of south India （where hydrodynamic and morphologic changes occur continuously after the December 2004 tsunami） by using Digital Shoreline Analysis System （DSAS）, an extension of ArcGIS. Multidate 1RS and Landsat Satellite data （1999, 2001, 2003, 2005, 2007, and 2009） are used to extract the shorelines. The data is processed by using the ERDAS IMAGINE 9.1 software and analyzed by ArcGIS 9.2 workstation. The rates of shoreline changes are estimated by three statistical methods, namely, End Point Rate （EPR）, Linear Regression Rate （LRR）, and Least Median of Squares （LMS） by using DSAS. The study reveals that most of the study area has undergoing erosion. Both natural and anthropogenic processes along the coast modify the shoreline configuration and control the erosion and accretion of the coastal zones. The coastal zones along the estuary have experienced accretion due to the littoral processes. The zones with headlands have more eroded than other zones along the study area. The study also shows that the coastal zones where sand is mined have relatively more rate of erosion than that of the other zones. Improper and unsustainable sand mining may also lead to severe erosion problem along this area. The shoreline change rates are altered by various geological processes along the coast. Thus, the present study implies that proper beach filling and nourishment projects should be made in the study area to save from hazards. It also indicates the advantage and suitability of DSAS to assess the shoreline changes compared with the traditional manual shoreline
文摘本刊2007年曾就中国远程教育工作者关心的马里兰学院大学（University Of Maryland UniversityCollege＊，以下简称“UMUC”）的远程教育质量保证、教师队伍建设和在线学习课程管理等话题采访了UMUC校长Susan C. Aldridge博士，以及该校负责远程教育硕士学位（Master of Distance Educa-tion,以下简称“MDE”）课程的Stella C. S. Porto博士。
文摘Reduction and Given’ess written by J.L.Marion, is to study Husserl, Heidegger and Phenomenology. The key in the book is whether it is the destiny of phenomenology to return to “things in themselves”. Marion’s understanding shows a “Givenness phenomena” beyond being. It looks like the love without being and opens to study the phenomenology of Givenness. Marion points out that, according to Husserl, essence and existence are not the really different principles but the two modes of being in two modes of self-givenness. For Marion, phenomenology is concerned not with objects or even being, but with givenness. Marion’s explanation offers a kind of attractive reduction for phenomenology.
