The Farsite distributed le system stores multiple replicas of les on multiple machines, to provide le access even when some machines are unavailable. Farsite assigns le replicas to machines so as to maximally exploit the di erent degrees of availability of di erent machines, given an allowable replication factor R. We use competitive analysis and simulation to study the performance of three can...

This paper explores the use of unmanned aerial vehicles (UAVs) in wildfire monitoring. To begin establishing effective methods for autonomous monitoring, a simulation (FLAME) is developed for algorithm testing. To simulate a wildfire, the well established FARSITE fire simulator is used to generate realistic fire behavior models. FARSITE is a wildfire simulator that is used in the field by Incid...

Farsite is a scalable, distributed file system that logically functions as a centralized file server but that is physically implemented on a set of client desktop computers. Farsite provides high degrees of reliability and availability by storing replicas of files on multiple machines. Replicas are placed to maximize the effective system availability, using a distributed, iterative, randomized ...

A raster based, spatially explicit model of surface fire spread called HFire is introduced. HFire uses the Rothermel fire spread equation to determine one dimensional fire spread, which is then fit to two dimensions using the solution to the fire containment problem and the empirical double ellipse formulation of Anderson. HFire borrows the idea of an adaptive time step from previous cell conta...

Farsite is a secure, scalable, distributed file system that logically functions as a centralized file server but that is physically realized on a set of client desktop computers. Farsite provides security, reliability, and availability by storing replicas of each file on multiple machines. It continuously monitors machine availability and relocates replicas as necessary to maximize the effectiv...

Objectives In a review of UK-supported clinical trials more than half of the investigators asked the funding agency for an extension and a third did not hit their recruitment targets [1]. Study feasibility is often assessed on an ad hoc basis by asking clinical staff to estimate how many patients with particular characteristics they might expect to see in a given time period, and over-estimatio...

We survey four secure fault-tolerance distributed file systems: Farsite, OceanStore, Ivy, and Frangipani. We analyze each with respect to fault-tolerance, scalability, usability, maintenance overhead, and consistency. Finally, we present a taxonomy for such file systems based upon their failure models, update mechanisms, and data location schemes.

This paper shows that the prediction capability of wildfire progression can be improved by estimation a single prevailing wind vector parametrized speed and direction to drive simulation created FARSITE. Estimations these vectors are achieved in this work gradient-free optimization via grid search compares model simulations with measured perimeters, where noisy observations modeled as uncertain...

Understanding the fire prediction capabilities of fuel models is vital to forest fire management. Various fuel models have been developed in the Great Xing'an Mountains in Northeast China. However, the performances of these fuel models have not been tested for historical occurrences of wildfires. Consequently, the applicability of these models requires further investigation. Thus, this paper ai...