The success of MapReduce has sparked many efforts to design cluster computing frameworks. We argue that no single framework will be optimal for all applications, and that we should instead enable organizations to run multiple frameworks efficiently in the same cloud. Furthermore, to ease development of new frameworks, it is critical to identify common abstractions and modularize their architect...

In this paper we describe the design and implementation of a system called the Network Weather Service (NWS) that takes periodic measurements of deliverable resource performance from distributed networked resources, and uses numerical models to dynamically generate forecasts of future performance levels. These performance forecasts, along with measures of performance uctuation (e.g. the mean sq...

This study shows that the joint effects of the entrepreneur’s personality and an unpredictable environment, as well as the interaction effects of a low uncertainty avoidance culture, predict opportunity exploitation. Our study’s findings are consistent with the emerging opportunityexploiter nexus framework of Shane and Venkataraman, which posits that the rate and nature of entrepreneurial explo...

INTRODUCTION A national consensus panel was convened to develop recommendations on future directions for home-based dementia care (HBDC). METHODS The panel summarized advantages and challenges of shifting to HBDC as the nexus of care and developed consensus-based recommendations. RESULTS The panel developed five core recommendations: (1) HBDC should be considered the nexus of new dementia m...

Fear of failure to identify cervical spine injury has led to extremely liberal use of radiography in patients with blunt trauma and remotely possible neck injury. A number of previous retrospective and small prospective studies have tried to address the question of whether any clinical criteria can identify patients, from among this group, at sufficiently low risk that cervical spine radiograph...

_______________________________________ The relative behavior of surface-crown fire spread rate modeling systems used in three fire management applications—CFIS (Crown Fire Initiation and Spread), FlamMap and NEXUS— is compared using fire environment characteristics derived from a dataset of destructively measured canopy fuel and associated stand characteristics. Although the surface-crown mode...

Device drivers typically execute in supervisor mode and thus must be fully trusted. This paper describes how to move them out of the trusted computing base, by running them without supervisor privileges and constraining their interactions with hardware devices. An implementation of this approach in the Nexus operating system executes drivers in user space, leveraging hardware isolation and chec...

This paper is an extension of the debate on the nexus between the strength of IPRs and prospects for knowledge economy. It assesses the relationships between software piracy and scientific publications in African countries for which data is available. The findings which reveal a positive nexus are broadly consistent with the school of thought postulating that, the East Asian miracle has been la...

The permeability of the septa of the earthworm in the median axon has been calculated for the anions fluorescein and its halogen derivatives. The values ranged from 5.4 X 10(-5) to 4 X 10(-6) cm/s. Previously, the septa had been shown to contain nexuses. By using freeze-fracture material, the surface area of nexus on the septal membranes was determined to be 4.5%, very similar to the percentage...

Environmental change is an acknowledged factor influencing human migration. Analytical research regarding the relationship between the environment and human migration has increased in recent years yet still faces numerous hurdles, partly due to limited availability of suitable data. We review available data and methodologies for investigating the environment-migration nexus, identifying data in...