OBJECTIVES Regional myocardial blood flow (MBF) and flow reserve measurements using nitrogen-13 (N-13) ammonia positron emission tomography (PET) were compared with quantitative coronary angiography to determine their utility in the detection of significant coronary artery disease (CAD). BACKGROUND Dynamic PET protocols using N-13 ammonia allow regional quantification of MBF and flow reserve....

As liquidity conditions in the term funding markets grew increasingly strained in late 2007, the Federal Reserve began making funds available directly to banks through a new tool, the Term Auction Facility (TAF). The TAF provides term funding on a collateralized basis, at interest rates and amounts set by auction. The facility is designed to improve liquidity by making it easier for sound insti...

One of the significant strategies of the power systems is Economic Dispatch (ED) problem, which is defined as the optimal generation of power units to produce energy at the lowest cost by fulfilling the demand within several limits. The undeniable impacts of ramp rate limits, valve loading, prohibited operating zone, spinning reserve and multi-fuel option on the economic dispatch of practical p...

N [AlE 1982, the Ceder-al Reserve switched from a nonborrowed-r-eserves to a bom-n’owed-r-esemves operating procedune.’ Analysts genem-ally believe that the adoption of this pr-ocedure, which involves the use of a “borrowings assumption” specified by the Federal Open Market Committee (CONIC), n’epresents a policy reversal towar-d the setting of the fedem-al funds n-ate and away from direct mone...

The Nemesis operating system is designed to provide Quality of Service to applications. Nemesis also allows applications to reserve CPU time and transmit bandwidth on network interfaces. We have implemented a TCP for Nemesis that makes use of these guarantees. We show that the Nemesis transmit scheduler rate-controls TCP traffic and thus leads to predictable traffic behavior when applications c...

In this paper we develop a possible notion of shortterm value-based reliability for operating an electric power network. As the electric power industry goes through the restructuring process, the operation based on the value-based reliability may be more appropriate than based on the traditional (N1) security criteria. The value-based reliability requires a framework where the factors to be con...

Using a Markov-switching Bayesian likelihood approach, the paper proposes a new measure of the degree of credibility of the Federal Reserve. We estimate a medium-scale macroeconomic model, where the central bank has access to a commitment technology, but where a regime-switching process governs occasional re-optimizations of announced plans. The framework nests the commonly used discretion and ...

The general equilibrium formulations are developed for two important economic environments. The first environment is the Lucas managerial span-of-control theory of the firm. It is shown that, in the spirit of McKenzie, the aggregate production set can be characterized by a convex cone. The second environment permits both the number of hours plants are operated and the number of workers operatin...