Comparison of the monitoring of surface deformations in open-pit mines with Sentinel-1A and TerraSAR-X satellite radar data.

In case necessary precautions are not taken in surface mines, serious accidents and loss of life may occur, particularly due to large mass displacements. It is extremely important to identify the early warning signs of these displacements and take the necessary precautions. In this study, free medium-resolution satellite radar images from the European Space Agency's (ESA) C-band Sentinel-1A satellite and commercial high-resolution satellite radar images (SAR, Synthetic Aperture Radar) from the Deutsches Zentrum für Luft- und Raumfahrt's (DLR) X-band TerraSAR-X satellite were obtained, and it was attempted to reveal the traceability and adequacy of monitoring of deformations and possible mass displacements in the dump site of an open-pit coal mine. The compatibility of the results obtained from the satellite radar data with two devices of Global Positioning System (GPS) which were installed in the field was evaluated. Furthermore, the velocity results in the Line Of Sight (LOS) direction and vertical deformation velocity results obtained with all three approaches (GPS/Sentinel-1A, GPS/TerraSAR-X, and Sentinel-1A/TerraSAR-X) were compared. It was observed that the results were statistically equal and the directions of movement were similar/compatible. The result of this study showed that deformations at mine sites can be monitored with sufficient accuracy for early warning with free Sentinel-1A satellite data, although the TerraSAR-X satellite offers a higher resolution.

Cross cultural adaptation and reliability of the Turkish version of Amputee Body Image Scale (ABIS).

OBJECTIVES: The Amputee Body Image Scale (ABIS) is a self assessed questionnaire with 20 items created to measure body image perception of amputees. The questions assess how an individual perceives and feels about his or her body experience. But no Turkish version is available. The aim of this study was to cross-culturally adapt the ABIS for use with Turkish speaking lower limb amputees and to determine reliability. METHODS: The sample consisted of 50 transtibial amputees. The mean age of the participants was 43.14, SD: 14.66. The ABIS has been filled by the patients for two times. RESULTS: Internal consistency of the ABIS was very high (Cronbach alpha 0.834 for test and 0.842 for retest). The test-retest reliability was excellent for the ABIS (ICC = 0.939, 95% CI 0.895-0.965). CONCLUSIONS: The Turkish version of the ABIS is a reliable instrument to assess body image in lower limb amputees.