Generating seamless mosaics of aerial images is a particularly challenging task when the mosaic comprises a large number of images, collected over longer periods of time and with different sensors under varying imaging conditions. Such large mosaics typically consist of very heterogeneous image data, both spatially (different terrain types and atmosphere) and temporally (unstable atmospheric pr...

Polycyclic aromatic hydrocarbons (PAHS) have been determined in the atmosphere of Isfahan, Iran. Airborne particulate matter was sampled using a high-volume air sampler at roof-top level (~6m). Extraction of PAHS from airborne particulate matter has been performed using SFE system and the relationship between the extraction temperature and the recovery of PAHS</su...

Magnetic field inhomogeneity causes artifacts in MRI. For example, in single-shot echo-planar imaging (EPI), they often appear as severe geometric distortions along the phase-encoding direction. Sensitivity encoding (SENSE) is useful in reducing the distortion in EPI since it only acquires partial k-space data using multiple receiver channels. In SENSE, a reference scan usually needs to be perf...

Formation anisotropic constants play an important role in the determination of formation stresses, fractures, lithology, and mechanical properties. These characteristics provide critical inputs to wellbore stability during drilling optimal completion designs hydrocarbon bearing reservoirs. However, there are no available techniques for estimation a sub-set using Logging-While-Drilling (LWD) son...

The paper presents a light-weight and low-cost airborne terrain mapping system. The developed Airborne LiDAR Scanner (ALS) system consists of a high-precision GNSS receiver, an inertial measurement unit and a magnetic compass which are used to complement a LiDAR sensor in order to compute a digital surface model. Evaluation of the accuracy of the generated surface model is presented. Additional...

iron mineralization of kalate shahin is located 107 km on the ghoochan-neyshaboor road (in khorasan razavi province). subvolcanic intrusive bodies of quartz monzonite to monzonite porphyry intruded the cretacous limestone. sedimentary units of the area in decreasing age include cretaceous limestone and eocene and paleocene-quaternary microconglomerate to sandstone. mineralization in the region ...

Up-to-date and accurate digital elevation models (DEMs) are essential for many applications such as numerical modeling of mass movements or mapping of terrain changes. Today the Federal Department of Topography, swisstopo, provides Digital Terrain Models (DTMs) and Digital Surface Models (DSMs) derived from airborne LiDAR data with a high spatial resolution of 2 m covering the entire area of Sw...

Seven post-operative wounds were infected with a strain of Staphylococcus aureus, probably acquired from a theatre orderly who suffered from a dry generalized eczema. The orderly was a nasal and heavy skin carrier, and was shown to be a disperser of the epidemic strain. Infection was probably acquired from airborne contamination in the operating theatre, since the orderly did not scrub-up. The ...