Much interest lies in long-term recovery rates of sagebrush communities after fire in the western United States, as sagebrush communities comprise millions of hectares of rangelands and are an important wildlife habitat. Little is known about postfire changes in sagebrush canopy cover over time, especially at a landscape scale. We studied postfire recovery of shrub canopy cover in sagebrush-ste...

We extend our previous work on structural steganalysis of LSB replacement in digital images, building detectors which analyse the effect of LSB operations on pixel groups as large as four. Some of the method previously applied to triplets of pixels carries over straightforwardly. However we discover new complexities in the specification of a cover image model, a key component of the detector. T...

Historical aerial images are important to retain past ground surface information. The land-use land-cover change in the past can be identified using historical aerial images. Automatic historical image registration and stitching is essential because the historical image pose information was usually lost. In this study, the Scale Invariant Feature Transform (SIFT) algorithm was used for feature ...

vegetation cover is the first barrier for the raindrops resulting to the interception and infiltration loss. interception as one of the main components of ecohydrology equation plays a major role in the water balance of rangelands. however, few studies have been done on the interception of rangeland plants in iran. this study was carried out to find the interception rate in astragalus parrowian...

Given the advances in remotely sensed imagery and associated technologies, several global land cover maps have been produced in recent times including IGBP DISCover, UMD Land Cover, Global Land Cover 2000 and GlobCover 2009. However, the utility of these maps for specific applications has often been hampered due to considerable amounts of uncertainties and inconsistencies. A thorough review of ...

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Analysis of the full waveform return pulse of laser altimeter systems is expected to increase the possibilities and accuracy in well-known applications of laser altimetry like DTM generation, forestry and earth surface analysis. NASA’s ICESat Geoscience Laser Altimeter System (GLAS) was launched in 2003 and acquires full waveform data along profiles covering the entire earth. In this study, the...

As more sensitive information is transmitted over computer networks, there has been a steady increase in the deployment of encryption to protect data in-flight. Myriad encrypted network protocols have emerged [8, 2, 1] that enable various applications like encrypted browsing, VPNs, secure shells, and VoIP. Since the data payload of an encrypted protocol is protected by strong encryption, attack...

As geographers continue to place more emphasis on the temporal aspect of spatial patterns, there is a need for innovative display techniques to supplement static maps. Visualization software and methods have been developed to recreate natural landscapes, but little has been done to investigate the potential for illustrating land cover change using temporal data acquired from the real world. In ...

OBJECTIVE To determine the representation of the sexes in JAMA cover art. DESIGN Review of 50 consecutive issues. SETTING JAMA, March 1997-March 1998. MAIN OUTCOME MEASURES Numbers and nature of covers portraying men and women. RESULTS Of the 50 covers, 34 depicted humans. 15 depicted women, 13 men, and 6 were of mixed or indeterminate sex. 11 pictures of women included a child and five...