Wideband AWGs are commonly used for simulating signal scenarios for receiver testing and transmitter upconversion blocks. The wideband AWG's ability to generate arbitrary signals is important in aerospace and defense and emerging communications where a wide range of signal formats are used. Many of these are either proprietary or do not comply with any accepted commercial standard. In addition,...

Creating effective transfer functions for high dynamic range scalar volume data is a challenging task. For data sets with limited information about their content, deriving transfer functions using mathematical properties (gradient, curvature, etc.) is a difficult trial and error process. Traditional methods use linear binning to map data to integer space for creating the transfer functions. In ...

We present new data structures for approximately counting the number of points in an orthogonal range. There is a deterministic linear space data structure that supports updates in O(1) time and approximates the number of elements in a 1-D range up to an additive term k in O(log logU · log log n) time, where k is the number of elements in the answer, U is the size of the universe and c is an ar...

In this paper we consider a special case of orthogonal point counting queries, called queries with distinct constraints. A d-dimensional orthogonal query range Q = [b1, b2]× [b3, b4]× . . .× [b2d−1, b2d] is a range with r distinct constraints if there are r distinct values among b1, b2, . . ., b2d. We describe a data structure that supports orthogonal range counting queries with r distinct cons...

In an outsourced database (ODB) system the database owner publishes data through a number of remote servers, with the goal of enabling clients at the edge of the network to access and query the data more efficiently. As servers might be untrusted or can be compromised, query authentication becomes an essential component of ODB systems. In this chapter we present three techniques to authenticate...