Rock grain size parameter is the key of reservoir rock physics analysis. The study found that relationship between NMR T 2 spectrum and distribution curve directly related to id="M2"> rock, so you can use id="M3"> retrieve spectral data. Based on calculation core experiment results ...

T ropical deforestation is occurring at unprecedented rates, contributing as much as a fifth of annual global carbon emissions and imparting significant impacts on biodiversity, ecosystem function, livelihoods, and climate (1–3). Selective logging, removal of 1–25 canopy trees per hectare with associated levels of harvesting damage, is predicted to greatly exceed tropical deforestation in exten...

The montane forests of Mount Kilimanjaro in Tanzania have been subjected to a long history of selective logging. However, since 1984 logging of indigenous trees is prohibited. Today, these forests allow us to evaluate the long-term effects of selective logging. We mapped the height and diameter at breast height (DBH) of all trees >10 cm DBH on 10 sites of 0.25 ha. Five sites represent non-logge...

BACKGROUND Managed forests are a major component of tropical landscapes. Production forests as designated by national forest services cover up to 400 million ha, i.e. half of the forested area in the humid tropics. Forest management thus plays a major role in the global carbon budget, but with a lack of unified method to estimate carbon fluxes from tropical managed forests. In this study we pro...

Conducting psychophysiological experiments that measure how players experience digital games not only allows investigating the effects digital games have on players, it also gives game developers a tool to validate game design. In order to develop digital games rapidly that can be used as stimuli in psychophysiological experiments, a coherent and flexible development environment is required. A ...

Casing coupling location signals provided by the magnetic localizer in retractors are typically used to ascertain the position of casing couplings in horizontal wells. However, the casing coupling location signal is usually submerged in noise, which will result in the failure of casing coupling detection under the harsh logging environment conditions. The limitation of Shannon wavelet time entr...

The article considers the problem related to ambiguity of logging results, which is reflected in reduction efficiency certain interpretive methods, and as a consequence oil gas reservoirs omission. In this regard, analysis results gamma logging, spontaneous polarization nuclear magnetic were conducted. received information experimental researches cores, has allowed establishing reasons distorti...

Existing rollback-recovery methods using consistent checkpointing may cause high overhead for applications that frequently send output to the “outside world,” since a new consistent checkpoint must be written before the output can be committed, whereas existing methods using optimistic message logging may cause large delays in committing output, since processes may buffer received messages arbi...

Most tropical forests are government-owned, with timber being harvested under concession agreements awarded to private logging companies. Those agreements tend to be short-term harvesting licenses lasting no more than one to a few years. In the absence of regulation, loggers can be expected to ignore the negative environmental impacts of logging, as they derive little or no financial gain from ...

With our current expectation for the exascale systems, composed of hundred of thousands of many-core nodes, the mean time between failures will become small, even under the most optimistic assumptions. One of the most scalable checkpoint restart techniques, the message logging approach, is the most challenged when the number of cores per node increases because of the high overhead of saving the...