نتایج جستجو برای: magnetic logging
تعداد نتایج: 346510 فیلتر نتایج به سال:
Greenhouse-gas emissions resulting from logging are poorly quantified across the tropics. There is a need for robust measurement of rain forest biomass and the impacts of logging from which carbon losses can be reliably estimated at regional and global scales. We used a modified Bitterlich plotless technique to measure aboveground live biomass at six unlogged and six logged rain forest areas (c...
The effects of logging on ecosystem sustainability are controversial. Surprisingly, existing data are inadequate to allow a comprehensive evaluation of logging effects on biodiversity, composition, and productivity since appropriate comparisons of stands of similar ages and differing disturbance histories are rare. We addressed this issue using a study of 2000 plots in 80 southern boreal forest...
As the world becomes an interconnected network where objects and humans interact with each other, new challenges and threats appear in the ecosystem. In this interconnected world, smart objects have an important role in giving users the chance for life-logging in smart environments. However, smart devices have several limitations with regards to memory, resources and computation power, hinderin...
In the rollback recovery of large-scale long-running applications in a distributed environment, pessimistic message logging protocols enable failed processes to recover independently, though at the expense of logging every message synchronously during fault-free execution. In contrast, coordinated checkpointing protocols avoid message logging, but they are poor in scalability with a sharply inc...
Although optimistic fault tolerance methods using message logging and checkpointing have the potential to provide highly e cient transparent fault tolerance in distributed systems existing methods are limited by several factors Coordinating the asynchronous message logging progress among all processes of the system may cause signi cant over head limiting their ability to scale to large systems ...
Drilling industry and its technical services are among the complex and advanced technology-based industries in the cycle of oil exploration and production. In this regard, the logging services role as one of the pillars of technical services is very important due to technological complexity and the importance of the results in the evaluation of oil and gas reservoirs. The complexity had caused ...
for Project NMR well logging provides a record of formation porosity, permeability, irreducible water saturation, oil saturation and viscosity. In the absence of formation material, the NMR logs are interpreted using default assumptions. Special core analysis on core samples of formation material provides a calibration between the log response and the desired rock and/or fluid property. The pro...
Non-Volatile Memory (NVM) is an emerging memory technology that combines the best properties of current hard disks and main memories by providing non-volatility, high density, high speed, and byte addressability. This provides an opportunity to redesign systems and their software stacks to improve performance and to reduce the complexity. Present-day database systems are designed and optimized ...
This paper presents a simple and effective method to reduce the size of log data for recovery in main memory databases. Fuzzy checkpointing is known to be very efficient in main memory databases due to asynchronous backup activities. By this feature, most recovery works in the past have used only physical logging schemes. Since the size of physical log records is quite large, physical logging s...
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