The Peruvian Amazon is an important arena in global efforts to promote sustainable logging in the tropics. Despite recent efforts to achieve sustainability, such as provisions in the US-Peru Trade Promotion Agreement, illegal logging continues to plague the region. We present evidence that Peru's legal logging concession system is enabling the widespread illegal logging via the regulatory docum...

-This paper based on crossplot and core data,analysis the Pu Xi oilfield ,Putao Hua oil layer ‘s conventional logging response characteristic.Based on the describe of the three cored wells, Putao Hua oil layer is mainly made up with siltstone, muddy siltstone, silty mudstone,. First normalized the well logging curves, elimination the influence of the nongeological factors to the well logging cu...

Rollback techniques that use message logging and deterministic replay can be used in parallel systems to recover a failed node without involving other nodes. Distributed shared memory (DSM) systems cannot directly apply message-passing logging techniques because they use inherently nondeterministic asynchronous communication. This paper presents new logging schemes that reduce the typically hig...

In main memory databases, fuzzy checkpointing gives less transaction overhead due to its asynchronous backup feature. However, till now, fuzzy checkpointing has considered only physical logging schemes. The size of the physical log records is very large, and hence it incurs space and recovery processing overhead. In this paper, we propose a recovery method based on a hybrid logging scheme, whic...

The distributed shared memory(DSM) system transforms an existing network of workstations to a powerful shared-memory parallel computer which could deliver superior price/performance. To provide fault tolerance to DSM system , checkpointing and logging is widely used. In this paper, we propose a novel logging scheme which greatly reduces the amount of logging by tracking the dependency informati...

This paper presents a novel logging scheme for recov-erable distributed shared memory systems. In the previous schemes, the stable logging is performed whenever a remote data value is accessed. However, in the proposed scheme, the data values are logged on the volatile storage of the writer process and only the access information between the dependent processes is logged stably. Also, to reduce...

An impulse-based single-borehole radar prototype has been developed for well logging. The borehole radar is comprised of subsurface sonde and surface equipment. An armored 7-conductor well logging cable is used to connect subsurface sonde and surface equipment which is well compatible with the other well logging instruments. The performance experiments of the prototype have been conducted in a ...

This paper presents a causal logging scheme for the lazy release consistent distributed shared memory systems. Causal logging is a very attractive approach to provide the fault tolerance for the distributed systems, since it eliminates the need of the stable logging. However, since interprocess dependency must causally be transferred with the normal messages, the excessive message overhead has ...

Disk logging is a fundamental building block for faulttolerance system design because it captures a persistent snapshot of critical system state for subsequent recovery in the occurrence of failures. Logging typically is required to be synchronous to ensure absolute recoverability. Therefore speeding up synchronous disk write is critical to those fault tolerance systems that are based on disk l...

In an agent system, the ability to handle problems and recover from them is important in sustaining stability and providing robustness. We claim that execution logging is essential to support agent system robustness, and that agents should have architectural-level support for logging and recovery methods. We describe an infrastructure-level, default methodology for agent problem-handling, based...