, and deferring trust to third parties. Existing systems that support security in networked applications, including X.509 and PGP, address only narrow subsets of the overall trust management problem and often do so in a manner that is appropriate to only one application. This paper presents a comprehensive

Exploring a space of materials: spatial sampling design and

We address the problem of graph rewriting and narrowing as the underlying operational semantics of rule-based programming languages. We propose new optimal graph rewriting and narrowing strategies in the setting of orthogonal constructor-based graph rewriting systems. For this purpose, we first

Abstract. We investigate the narrowing relation in a wide class of (cyclic) term-graph rewrite systems. We propose a new sound and complete narrowing-based algorithm able to solve goals in presence of data structures with pointers (e.g., circular lists, doubly linked lists etc.). We first define

validity; rather, scoring a subset of trials frequently yields higher predictive validities. Subset analysis serves the same ends in performance-test theory as does item analysis in conventional psychometrics. Serial averaging and its applications (reliability and stability optima, optimal scoring for

In English, broad and late narrow focus have identical accent patterns: Pitch accents are aligned with the last accentable constituent within an intonation contour. Under early narrow focus, the pitch accent is claimed to shift to an earlier location and the last accentable syllable is deaccented

on an atomless σ-finite measure space (Ω,Σ, µ). Let there exists a purely atomic sub-σ-algebra F ⊆ Σ with Ω ∈ F such that the conditional expectation operator M(·/F) : E → E is correctly defined and bounded. Then a subset K ⊂ C is the spectrum of some narrow operator T: E → E if and only if K is a compact set

Abstract not found

What is it, who has it, and how is it defined?*

Various diseases can diffusely involve central airways, including the trachea and main stem bronchi. Central airway abnormalities are frequently not apparent or are overlooked on chest radiographs, even though the patient may have significant symptoms. Recent advances in spiral and multi-detector computed tomography (CT) with multi-planar reconstruction and three-dimensional demonstration, including virtual bronchoscopy, allow for excellent display of central airway anatomy and abnormalities with visualization of accurate locations of lesions. Early detection and proper diagnosis of airway diseases based on various radiographic findings will help determine appropriate treatment, including surgical planning and evaluation of treatment response. Herein we describe and illustrate the imaging findings of a wide spectra of diffuse central airway diseases.