The method of nuclear magnetic logging (NML) allows to distinguish easily enough the intervals in which there are hydrocarbons and forecast their extraction. Moreover, principles measuring using this simple enough, despite difficulties processes. There were described improving spectral composition probing voltage NML device article. disadvantage is that resonance area covers all reservoir fluid...

To illustrate the Reactor pattern, consider the event-driven server for a distributed logging service shown in Figure 1. Client applications use this service to log information (such as error notifications, debugging traces, and status updates) in a distributed environment. In this service, logging records are sent to a central logging server. The logging server outputs the logging records to a...

Shale oil reservoirs differ from conventional in several aspects, including the sedimentary model, accumulation mechanism, and reservoir characteristics, which pose significant challenges to their exploration development. Therefore, identifying location of optimal spots is crucial for successful development shale reservoirs. Mobility, particularly low-permeability with nano-scale pores, a petro...

Nuclear magnetic resonance (NMR) logging provides a new means of estimating the hydraulic conductivity (K) of unconsolidated aquifers. The estimation of K from the measured NMR parameters can be performed using the Schlumberger-Doll Research (SDR) equation, which is based on the Kozeny-Carman equation and initially developed for obtaining permeability from NMR logging in petroleum reservoirs. T...

A new type of logs, the command log, is being employed to replace the traditional data log (e.g., ARIES log) in the inmemory databases. Instead of recording how the tuples are updated, a command log only tracks the transactions being executed, thereby effectively reducing the size of the log and improving the performance. Command logging on the other hand increases the cost of recovery, because...

Sixty-four different logging scenarios for an initially undisturbed forest stand at Deramakot (Malaysia) were simulated with rain forest growth model FORMIND. The scenarios differ regarding the logging cycle, logging method, cutting limit and logging intensities. We characterise the impacts with four criteria describing the yield, canopy opening and changes in species composition. Multicriteria...

sustainable forest management in caspian forests of iran requires cost-benefit analysis in order to maintain the quality of timber stands during logging operations. this study was done with the aim of cost and gross revenue computations from current logging (net present value) in three adjacent compartments in district 2 of shafroud watershed. motion and time studies were carried out during fel...

Third, error logging and reporting is important. As an industry, we currently support very primitive logging with no mechanisms for root-cause analysis or correlation of failures. Error messages are often arcane or not useful, and “firstfailure” capture is impossible. This is evidenced by a common, though unrealistic, request from support center staff: “Turn logging on and recreate the failure....

The UNIX Fast File System (FFS) is probably the most widely-used file system for performance comparisons. However, such comparisons frequently overlook many of the performance enhancements that have been added over the past decade. In this paper, we explore the two most commonly used approaches for improving the performance of meta-data operations and recovery: logging and Soft Updates. The com...