نتایج جستجو برای: magnetic logging

تعداد نتایج: 346510  

Journal: :Scientific American 1921

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2012
Julia S Markl Matthias Schleuning Pierre Michel Forget Pedro Jordano Joanna E Lambert Anna Traveset S Joseph Wright Katrin Böhning-Gaese

Animal-mediated seed dispersal is important for sustaining biological diversity in forest ecosystems, particularly in the tropics. Forest fragmentation, hunting, and selective logging modify forests in myriad ways and their effects on animal-mediated seed dispersal have been examined in many case studies. However, the overall effects of different types of human disturbance on animal-mediated se...

2001
Juchang Lee Kihong Kim Sang Kyun Cha

With a gigabyte of memory priced at less than $2,000, the main-memory DBMS (MMDBMS) is emerging as an economically viable alternative to the disk-resident DBMS (DRDBMS) in many problem domains. The MMDBMS can show significantly higher performance than the DRDBMS by reducing disk accesses to the sequential form of log writing and the occasional checkpointing. Upon the system crash, the recovery ...

1999

The porosity of a zone can be estimated either from a single “porosity log” (sonic, density, neutron, or magnetic resonance log) or a combination of porosity logs, in order to correct for variable lithology effects in complex reservoirs. In the carbonates, mineral mixtures are primarily drawn from calcite, dolomite, and quartz (either as sand grains or as chert); anhydrite and gypsum may also o...

Journal: :Current Biology 2016
Gaëlle Fehlmann Andrew J. King

Fehlmann and King introduce bio-logging techniques to track free-living animals.

1994
MICHEL RUFFIN

Logging is ubiquitous in fault-tolerant systems and its use is growing in recent research. Logs are used for many purposes: keeping histories, security, concurrency control, failure recovery, update atomicity, fast physical writes, etc. This paper surveys the uses of logging and points out the commonalities and diierences of clients' needs. It aims to provide the user and the designer of a log ...

Journal: :Science 2006
D C Donato J B Fontaine J L Campbell W D Robinson J B Kauffman B E Law

We present data from a study of early conifer regeneration and fuel loads after the 2002 Biscuit Fire, Oregon, USA, with and without postfire logging. Natural conifer regeneration was abundant after the high-severity fire. Postfire logging reduced median regeneration density by 71%, significantly increased downed woody fuels, and thus increased short-term fire risk. Additional reduction of fuel...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده فنی و مهندسی 1388

asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...

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