The geological disasters caused by the ground deformation of goaf have brought huge security risks to ecological environment and society. Therefore, it is imminent realize effective monitoring stability analysis goaf. In this paper, taking gypsum mine in Diaodao District, Jingmen City as an example, through investigation overall structure distribution characteristics goaf, combined with mechani...

There is heightened optimism about the potential of 3D visualization software as an alternative learning resource in radiology education. The purpose of this study was to investigate the effect of 3D visualization software on students' learning of oral radiographic interpretation from 2D radiographic images. Fourth-year dental students underwent a learning intervention phase of radiographic int...

OBJECTIVE In this study, a Voice over Internet Protocol (VoIP) communication based on G.729 protocol was simulated to determine the effects of this system on acoustic perturbation parameters of normal and pathological voice signals. PATIENTS AND METHODS Fifty recordings of normal voice and 48 recordings of pathological voice affected by laryngeal paralysis were transmitted through a VoIP comm...

Received Jan 21, 2018 Revised Mar 18, 2018 Accepted Mar 29, 2018 In recent years, multichannel audio systems are widely used in modern sound devices as it can provide more realistic and engaging experience to the listener. This paper focuses on the performance evaluation of three lossy, i.e. AAC, Ogg Vorbis, and Opus, and three lossless compression, i.e. FLAC, TrueAudio, and WavPack, for multic...

With 3D scans, detailed models of both coin sides can be obtained which allow a more accurate analysis. When using virtual 3D models of a coin, high accuracy is a prerequisite for further coin documentation and coin identification processes. The difference between the original coin model and its virtual 3D model counterpart should be as minimal as possible. In this paper, we present an evaluati...

We specify a 3D network-distributed virtual environment (DVE) where students learn computer graphics programming. The client/server software consists of a programming environment, the 3D DVE that is used to develop dynamic link libraries (DLLs) to generate 3D graphics. The software distributes a DLL to remote clients in an automatic way, and allows students to view the output of the DLL togethe...

The purpose of our study was to compare the accuracy of an unconventional, non-invasive and relatively inexpensive Microscribe (3D digitizer) with a standard widely used and expensive CT-Scan and/or MRI for 3D reconstruction of a human skull, which will be used for biomechanics studies. Two models of the human skull were developed (reconstructed), one using the 3D coordinates generated by the M...