simultaneous heat and water model (shaw) is based on the assimilation rate of melting and/or freezing of the accumulated snow as well as melting of ice in soil. the main objective of this study was to evaluate applicability of shaw model in determining maximum depth of frost penetration in soils in some typical climates of iran. to this end, the daily data of air temperature, soil temperatures ...

offshore pipelines used for oil and gas transportation are often buried to avoid damage from fishing activities and to provide thermal insulation. thermal expansion and contraction of the pipeline during operation can lead to lateral or upheaval buckling. a safe buried pipeline design must take into account a reliable evaluation of soil uplift resistance and pipe embedment depth. while the cost...

Stereo plaid stimuli were created to investigate whether depth perception is determined by an intersection of constraints (IOC) or vector average (VA) operation on the Fourier components, or by the second-order (non-Fourier) feature in a pattern. We first created stereo plaid stimuli where IOC predicted vertical disparity, VA predicted positive diagonal disparity and the second-order feature pr...

Our goal was to evaluate the risk factors for regional recurrence in upper lip squamous cell carcinoma (SCC).A total of 109 patients with upper lip SCC were retrospectively enrolled. Clinical and pathologic information was collected and analyzed.Fifteen (13.8%) patients had a regional metastasis, 2 patients had parotid node metastasis, and no local or distant metastasis was noted. There was nec...

Ray-based reflection tomography has become widely used as a tool for updating velocity models in depth imaging. Historically, development of ray-based tomography for depth imaging followed two separate methodologies. Early ray-based tomography was based on differences in traveltime observed between modeled data and actual seismic data (Bishop et al, 1983). As technology for imaging in complex a...

ARPA Image Understanding Workshop 1996 A critical challenge in the creation of autonomous mobile robots is the reliable detection of moving and static obstacles. In this paper, we present a passive vision system that recovers coarse depth information reliably and e ciently. This system is based on the concept of depth from focus, and robustly locates static and moving obstacles as well as stair...

Abstract. Here we revisit a recently introduced process of relative depth estimation through the matching of photometric stereo images. By considering the general solution of the differential equation which relates surface depth to the disparity map produced by the matching process, we are able to obtain a more consistent formulation of such disparity-based approach to photometric stereo. Also,...

VIDET is a research project active at the University of Bologna and aimed at the development of a mobility aid for the visually impaired. VIDET’s approach consists in the conversion of depth data gathered through a stereo-vision system into a 3D model perceivable by the user by means of a wire-actuated haptic interface. In this paper we describe VIDET’s real-time stereo-vision system, implement...