NASA Scientific and Technical Aerospace Reports - The University ...

it is an exploration of ad-hoc retrieval over a large set of queries and a large collection of documents; second, it investigates
questions of system evaluation, in particular whether it is better to evaluate using many shallow judgments or fewer thorough
judgments. As with the 2007 track [ACA+07], participants ran 10,000 queries against a collection of 25 million documents.
The 2008 track differed in the following ways: 1. Queries were assigned to one of four categories. 2. Each query was assigned
a target of 8, 16, 32, 64, or 128 judgments. 3. Assessors could judge documents \not relevant but reasonable. Section 1
describes how the corpus and queries were selected, the query classes, details of the submission formats, and a brief
description of each submitted run. Section 2 provides an overview of the judging process, including a sketch of how it
alternated between two methods for selecting the small set of documents to be judged. Sections 3.1 and 3.2 provide an
overview of those two selection methods, developed at UMass and NEU, respectively. In Section 4 we present statistics
collected during the judging process, including the total number of queries judged, how many judgments were served by each
approach, and so on, along with the overall results of the track. We present additional results and analysis in Section 5.
DTIC
Information Retrieval; Information Analysis; Query Languages; Searching
20100017174 New York Dept. of State, Albany, NY, USA
Coast Zone Management Study Stage II
July 1977; 136 pp.; In English
Report No.(s): PB2010-104025; No Copyright; Avail.: CASI: A07, Hardcopy
In 1972, the Congress of the USA passed the Coastal Zone Management Act after almost a decade of research leading
to a national policy on major waterways. The main purpose of this legislation was to encourage all levels of government to
work to achieve the wise use of the land and water resources of the coastal zone giving full consideration to ecological,
cultural, historic and aesthetic values as well as the need for economic development. During Phase II of the program, emphasis
has been placed on identifying specific coastal resources and determining which geographical areas are of particular concern
either because of their resources or the conditions which exist there. This report contains extensive basic data such as existing
land use in the coastal towns, soil conditions, location of wetlands, the status of water and sewer facilities, and zoning as well
as a detailed description of the Geographical Areas of Particular Concern. Also included are maps showing permissible land
uses by priority for the entire coastal area where land use conflicts either already exist or may be anticipated.
NTIS
Coasts; Marine Resources; Law (Jurisprudence); Environment Management
20100017259 Texas A&M Univ., College Station, TX, USA
Intelligent Transportation Systems Data Compression Using Wavelet Decomposition Technique
Qiao, Fengxiang; Liu, Hao; Yu, Lei; December 2009; 84 pp.; In English
Report No.(s): PB2010-107422; SWUTC/09/167651-1; No Copyright; Avail.: National Technical Information Service
(NTIS)
Intelligent Transportation Systems (ITS) generates massive amounts of traffic data, which posts challenges for data
storage, transmission and retrieval. Data compression and reconstruction technique plays an important role in ITS data
procession. Traditional compression methods have been utilized in Transportation Management Centers (TMCs), but the data
redundancy and compression efficiency problems remain. In this report, the wavelet incorporated ITS data compression
method is initiated. The proposed method not only makes use of the conventional compression techniques but, in addition,
incorporates the one-dimensional discrete wavelet compression approach. Since the desired wavelet compression is a lossy
algorithm, the balancing between the compression ratio and the signal distortion is exceedingly important. During the
compression process, the determination of the threshold is the key issue that affects both the compression ratio and the signal
distortion. An algorithm is proposed that can properly select the threshold by balancing the two contradicted aspects. Three
performance indexes are constructed and the relationships between the three indices and the threshold are identified in the
algorithm. A MATLAB program with the name Wavelet Compression for ITS Data (WCID) has been developed to facilitate
the compression tests. A case study on TransGuide ITS data was put into play and a final compression ratio of less than one
percent on the trade-off threshold value shows that the proposed approach is practical. Finally, the threshold selection
algorithm can be further tuned up utilizing Autoregressive model so that the quality of reconstructed data can be improved
with a minor overhead of saving only a few parameters.
NTIS
Data Compression; Decomposition; Signal Distortion; Transportation; Wavelet Analysis
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