Welcome to this special issue ofWireless Personal Communications. This special issue comprises a selection of best papers from the First International Conference on Mobility for Life: Technology, Telecommunication and Problem Based Learning (TTPBL) Conference. This three days event provided a dynamic platform for experts, scholars, higher education policy makers and private sector parties from ...

The Cretaceous/Paleogene (K/Pg) boundary is marked by one of the largest mass extinctions in Earth’s history, with geological evidence for this event being expressed hundreds locations worldwide. An extensively studied section located near El Kef, northwestern Tunisia, characterized classic iridium-rich K/Pg layer, abundant and well-preserved microfossils, apparently continuous sedimentation th...

Nearly three decades of stable isotope ratios and surface mass balance (SMB) data from eight shallow firn cores retrieved at Fimbul Ice Shelf, East Antarctica, in the Austral summers 2009-2011 have been investigated. An additional longer core drilled in 2000/2001 extends the series back to the early eighteenth century. Isotope ratios and SMB from the stacked record of all cores were also relate...

We propose a new age scale for the two ice cores (GRIP and GISP2) that were drilled at Greenland summit, based on accelerator mass spectrometry C dating of foraminifera in core MD95-2042 (Paleoceanography 15 (2000) 565), calibrated by means of recently obtained paired C and Th measurements on pristine corals (Marine radiocarbon calibration curve spanning 10,500 to 50,000 years BP (thousand year...

Between 1990 and 1992 an extensive artificial cavity installation program was conducted on the Francis Marion National Forest (FMNF) in coastal South Carolina where Hurricane Hugo had caused vast devastation. Four artificial cavity types were installed: drilled starts, drilled cavities, modified drilled cavities, and inserts. In 1998, we examined 443 of the artificial cavities (average age 8.5 ...

Currently about 170 impact craters are known on Earth; about one third of those structures are not exposed on the surface and can only be studied by geophysics or drilling. The impact origin of geological structures can only be confirmed by petrographic and geochemical studies; thus, it is of crucial importance to obtain samples of subsurface structures. In addition, structures that have surfac...

Accurate information on Young’s modulus (E) is required for simulating rock deformation in mines; the other hand, it very cumbersome to obtain laboratory and collecting drilled cores sufficient amounts, especially case of soft rocks, quite impossible. Empirical equations were deducted E from easily determinable properties, final model was selected through different statistical strength paramete...

Drilling consists of 2 processes: breaking the formation with a bit and removing the drilled cuttings. In rotary drilling, rotational speed and weight on bit are used to control drilling, and the optimization of these parameters can markedly improve drilling performance. Although fluids are used for cuttings removal in terrestrial drilling, most planetary drilling systems conduct dry drilling w...