scholarly journals The ground surface advantage in change detection: coherent surface structure

2010 ◽  
Vol 8 (6) ◽  
pp. 456-456
Author(s):  
Z. Bian ◽  
G. Andersen
Keyword(s):  
Change Detection ◽  
Surface Structure ◽  
Ground Surface

An Unusual Pueblo III Ruin, Mesa Verde, Colorado

1960 ◽  
Vol 26 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Ralph A. Luebben ◽  
Laurence Herold ◽  
Arthur Rohn
Keyword(s):  
Surface Structure ◽  
Ground Surface ◽  
Masonry Walls ◽  
San Juan ◽  
Small Surface ◽  
Floor Level ◽  
The Third ◽  
Masonry Construction ◽  
Mesa Verde ◽  
Construction Techniques

AbstractSite 52, a possible platform mound, is unusually situated near the bottom of a draw rather than along the ridge of Chapin Mesa. Complete excavation of the small surface structure yielded two distinct levels of construction and several architectural phenomena which previously had not been reported from San Juan Anasazi sites. A rectangle of multiple-coursed masonry was built on a sloped, irregular ground surface. An interior crosswall with a floor level opening, a raised circular floor feature, two peripheral stepped abutments on opposite sides, and a complex of masonry walls and external alignments on the third side were added to the basic rectangle. The second construction level utilized what appeared to be intentional interior and exterior fill as a base, and two alignments further subdivided the rectangle. Two rubble-filled abutments were appended externally to the fourth wall of the rectangle. Artifacts were rarely found. Solid, continuously built coursed masonry, construction techniques, and pottery types suggest that Site 52 was built during Pueblo III and may have been a platform mound of ceremonial significance.

Geohazard Mapping and Identification Along Pipeline Right-of-Ways Using Space-Borne Synthetic Aperture Radar

2012 ◽  
Author(s):  
Michael D. Henschel ◽  
Gillian Robert ◽  
Benjamin Deschamps ◽  
Richard W. Gailing
Keyword(s):  
Synthetic Aperture Radar ◽  
Change Detection ◽  
Ground Surface ◽  
Synthetic Aperture ◽  
Efficient Manner ◽  
Joint Project ◽  
Radar Imagery ◽  
Satellite Radar ◽  
Cost Efficient ◽  
Aperture Radar

Many energy pipelines traverse hilly and mountainous terrains that are prone to landslides and other geohazards. The mapping, identification, and monitoring of geohazards along pipeline right-of-ways are essential in effectively managing the risks they may pose to pipeline integrity and human safety. One approach to monitoring potential geohazards is to use space-borne synthetic aperture radar (SAR). SAR is an effective and proven technology used to monitor ground surface change over vast areas and can be used in a cost-efficient manner, especially in areas that are remote or challenging. This paper focuses on aspects of a novel three-fold approach for monitoring geohazards using satellite radar imagery. This is accomplished by combining interferometric SAR (InSAR), automated amplitude change detection, and polarimetric change detection. The resulting analyses are to be merged into a new geohazard index map that will provide a simplified overview of the change influence for given pipeline segments over an extensive area. It is anticipated that the geohazard index map would be used to support operator decision-making in proactively mitigating the potential adverse effects identified. A brief introduction to the methodologies employed and a discussion of the validation that is currently underway as a joint project between MDA Geospatial Services and Southern California Gas Company is provided by this paper.

scholarly journals Change detection and primacy of the ground surface in scene organization

2010 ◽  
Vol 6 (6) ◽  
pp. 732-732 ◽  
Author(s):  
Z. Bian ◽  
G. J. Andersen
Keyword(s):  
Change Detection ◽  
Ground Surface

scholarly journals Deep Siamese Networks Based Change Detection with Remote Sensing Images

2021 ◽  
Vol 13 (17) ◽  
pp. 3394 ◽  
Author(s):  
Le Yang ◽  
Yiming Chen ◽  
Shiji Song ◽  
Fan Li ◽  
Gao Huang
Keyword(s):  
Remote Sensing ◽  
Deep Learning ◽  
Change Detection ◽  
Ground Surface ◽  
Semantic Segmentation ◽  
Optical Remote Sensing ◽  
Remote Sensing Images ◽  
Image Pairs ◽  
Segmentation Task ◽  
High Level

Although considerable success has been achieved in change detection on optical remote sensing images, accurate detection of specific changes is still challenging. Due to the diversity and complexity of the ground surface changes and the increasing demand for detecting changes that require high-level semantics, we have to resort to deep learning techniques to extract the intrinsic representations of changed areas. However, one key problem for developing deep learning metho for detecting specific change areas is the limitation of annotated data. In this paper, we collect a change detection dataset with 862 labeled image pairs, where the urban construction-related changes are labeled. Further, we propose a supervised change detection method based on a deep siamese semantic segmentation network to handle the proposed data effectively. The novelty of the method is that the proposed siamese network treats the change detection problem as a binary semantic segmentation task and learns to extract features from the image pairs directly. The siamese architecture as well as the elaborately designed semantic segmentation networks significantly improve the performance on change detection tasks. Experimental results demonstrate the promising performance of the proposed network compared to existing approaches.

Surface Structure of the Spores of Glugea Weissenbergi

1969 ◽  
Vol 27 ◽  
pp. 238-239
Author(s):  
Sanford H. Vernick ◽  
Anastasios Tousimis ◽  
Victor Sprague
Keyword(s):  
Electron Microscope ◽  
Surface Structure ◽  
Transmission Electron Microscope ◽  
Mature Spore ◽  
Spore Surface ◽  
Sectioned Material ◽  
Transmission Electron ◽  
Surface Detail

Recent electron microscope studies have greatly expanded our knowledge of the structure of the Microsporida, particularly of the developing and mature spore. Since these studies involved mainly sectioned material, they have revealed much internal detail of the spores but relatively little surface detail. This report concerns observations on the spore surface by means of the transmission electron microscope.

Surface Structure of Nucleated Animal Cells: Carbon Replicas

1967 ◽  
Vol 25 ◽  
pp. 120-121
Author(s):  
Robert M. Glaeser ◽  
Thea B. Scott
Keyword(s):  
Cell Surface ◽  
Surface Structure ◽  
Particle Diameter ◽  
Cellular Functions ◽  
Animal Cells ◽  
Replica Technique ◽  
Carbon Replica ◽  
Characteristic Particle ◽  
Cell Surface Structure ◽  
Carbon Replicas

The carbon-replica technique can be used to obtain information about cell-surface structure that cannot ordinarily be obtained by thin-section techniques. Mammalian erythrocytes have been studied by the replica technique and they appear to be characterized by a pebbly or “plaqued“ surface texture. The characteristic “particle” diameter is about 200 Å to 400 Å. We have now extended our observations on cell-surface structure to chicken and frog erythrocytes, which possess a broad range of cellular functions, and to normal rat lymphocytes and mouse ascites tumor cells, which are capable of cell division. In these experiments fresh cells were washed in Eagle's Minimum Essential Medium Salt Solution (for suspension cultures) and one volume of a 10% cell suspension was added to one volume of 2% OsO4 or 5% gluteraldehyde in 0.067 M phosphate buffer, pH 7.3. Carbon replicas were obtained by a technique similar to that employed by Glaeser et al. Figure 1 shows an electron micrograph of a carbon replica made from a chicken erythrocyte, and Figure 2 shows an enlarged portion of the same cell.

High resolution surface structure of foot-and-mouth disease virus

1978 ◽  
Vol 36 (2) ◽  
pp. 376-377
Author(s):  
S. S. Breese ◽  
H. L. Bachrach
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Surface Structure ◽  
Disease Virus ◽  
Potassium Phosphate ◽  
Foot And Mouth Disease ◽  
Mouth Disease ◽  
Physical Measurements ◽  
Mouth Disease Virus ◽  
Foot And Mouth

Models for the structure of foot-and-mouth disease virus (FMDV) have been proposed from chemical and physical measurements (Brown, et al., 1970; Talbot and Brown, 1972; Strohmaier and Adam, 1976) and from rotational image-enhancement electron microscopy (Breese, et al., 1965). In this report we examine the surface structure of FMDV particles by high resolution electron microscopy and compare it with that of particles in which the outermost capsid protein VP3 (ca. 30, 000 daltons) has been split into smaller segments, two of which VP3a and VP3b have molecular weights of about 15, 000 daltons (Bachrach, et al., 1975).Highly purified and concentrated type A12, strain 119 FMDV (5 mg/ml) was prepared as previously described (Bachrach, et al., 1964) and stored at 4°C in 0. 2 M KC1-0. 5 M potassium phosphate buffer at pH 7. 5. For electron microscopy, 1. 0 ml samples of purified virus and trypsin-treated virus were dialyzed at 4°C against 0. 2 M NH4OAC at pH 7. 3, deposited onto carbonized formvar-coated copper screens and stained with phosphotungstic acid, pH 7. 3.

Examination of Schistosome Cercariae and Schistosomules by Scanning Electron Microscopy

1969 ◽  
Vol 27 ◽  
pp. 50-51
Author(s):  
D. Johnson ◽  
P. Moriearty
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
High Resolution ◽  
Light Microscopy ◽  
Surface Structure ◽  
Extensive Study ◽  
Scanning Microscopy ◽  
Host Parasite ◽  
Conventional Electron Microscopy ◽  
Scanning Electron

Since several species of Schistosoma, or blood fluke, parasitize man, these trematodes have been subjected to extensive study. Light microscopy and conventional electron microscopy have yielded much information about the morphology of the various stages; however, scanning electron microscopy has been little utilized for this purpose. As the figures demonstrate, scanning microscopy is particularly helpful in studying at high resolution characteristics of surface structure, which are important in determining host-parasite relationships.

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