Abstract
The coming years will witness dramatic advances in wireless communications as well as positioning technologies. As a result,tracking the changing positions of objects capable of continuous movement is becoming increasingly feasible and necessary. The present paper proposes a novel, R-tree based indexing technique that supports the efficient querying of the current and projected future positions of such moving objects. The technique is capable of indexing objects moving in one, two, and three-dimensional space. Update algorithms enable the index to accommodate a dynamic data set, where objects may appear and disappear, and where changes occur in the anticipated positions of existing objects.A comprehensive performance study is reported.
1 Introduction
The rapid and continued advances in positioning systems,e.g., GPS, wireless communication technologies, and electronics in general promise to render it increasingly feasible to track and record the changing positions of objects capable of continuous movement.
In a recent interview with Danish newspaper Børsen,Michael Hawley from MIT’s Media Lab described how he was online when he ran the Boston Marathon this year [19].Prior to the race, he swallowed several capsules, which in... Since the operational inception of GPS in 1995, the need for location technology has expanded beyond traditional navigation to include other applications like: geo-tagging, geo-fencing, asset tracking, location based services, timing and location based authentication. Many of these applications are significantly hindered by the poor performance of GPS and more broadly Global Navigation Satellite Signals (GNSS) within indoor environments and other occluded scenarios such as urban canyons. GNSS solutions are often unavailable in these difficult environments simply because the power of the transmitted signals are unable (even with signal processing gain) to penetrate various obstructions between the satellite sources and the user. Additionally, it is well known that GNSS signals can be readily spoofed using low cost and readily available equipment. There is a broad need for alternate methods to either: provide a widely available positioning signal when GNSS is not performing adequately or provide an authenticable (difficult to spoof) time and location solution even during cases where GNSS solutions appear to be working well...
ABSTRACT
As advanced communications techniques reach capacity, have reduced performance or system availability, or become unusable, the warfighter must have a reliable, high-capacity communications system in place and standing ready to supplant the degrading systems. Events in the recent past have shown satellites vulnerable to a number of ills or potential problems that could be debilitating. This paper addresses supporting the warfighter as satellite communications (SATCOM) vanishes during stressed communications conditions such as jamming. The text presents example networks encompassing representative operational conditions and scenarios. Various analysis results present available user rates, expected latencies, and network capacities replacing the stressed SATCOM links as well as future potential research directions.
INTRODUCTION AND BACKGROUND
Stressed communications systems disrupt data transmission and hinder information transfer. As a result of Net-Centric Warfare, today’s warfighter depends even more on critical communications to fight battles with decisive actions and do so on a 24/7 basis. Various disruptive methods such as electronic, physical or other invasive techniques can be used as an attacking method. While physical attacks have found their way into our news in recent times, this paper focuses on the use of electronic jamming and the resulting stress satellite communication systems and alternatives to overcome jamming. University of Florida, Gainesville Jet Propulsion Laboratory University of Maryland, College Park ESTF 2010, June 22, 2010
This work was carried out at the University of Florida, Gainesville, and at the Jet Propulsion Laboratory, California Institute of Technology. It was funded by the National Aeronautics and Space Adminstration (NASA) Advanced Information Systems Technology (AIST) Program under grant number AIST-08-0081.
Application Objectives (I)
• Provide the NASA workforce with previously unavailable data(base) management, analysis, and query capabilities that will advance the research and understanding of dynamic weather events based on data derived from the NASA mission sensor measurements
• Focus on tropical cyclone events
• Our technology will provide both Earth Science researchers and non-scientist decision makers with the capability too ad-hoc query for dynamic atmospheric events and their related information, an do easily retrieve satellite data for scientific analysis. LEARNING OBJECTIVES
• Identify code requirements regarding sizing, design, and selection of HVAC equipment and ducts • Explain how the ACCA Manual J, S and D load calculation standards are used to determine appropriate sizing and design of ducts and HVAC equipment • Describe the role the HVAC system plays in moisture control and the effect excessive moisture has on building durability and occupant comfort and health • Define sensible and latent heat • Review a completed load calculation printout for common errors and intentional inputs of incorrect data and identify examples of such errors • Compare installed HVAC and duct systems to outputs of Manual J, S, and D to verify proper sizing and design • Describe the consequences of improperly sized HVAC systems Summary
With the rapid developments in positioning technologies such as the Global Positioning System (GPS) and wireless communications, tracking of continuously moving objects has become feasible in terms of technology and implementation cost. However, this recent development poses new challenges to traditional database technology. In particular, traditional database systems have not been designed to support high update load due to object agility, predictive and spatio-temporal based query processing, and location privacy protection. In this thesis, we address three important basic issues in moving objects databases: indexing, querying and location privacy protection. The main design criteria of the algorithms and data structures is cost effective integration into an existing DBMS. In this connection, we extend an existing RDBMS, MySQL, to include a new indexing mechanism and query processing strategies with minimal alteration to existing codes. In moving object applications, large quantities of... Abstract
Corporate sponsorship of sports, the arts, community events, and causes has been recognized as a marketing communications tool. Corporations and organizations have embraced sponsorship as a vital component of their marketing strategy. The use of corporate sponsorship has increased over the last twenty years and it now provides an economic impact nearing $200 billion, when sponsorship fees and related advertising, sales promotions, and client entertaining are included. Yet despite its widespread use among practitioners, sponsorship continues to receive little attention in the academic environment. This study examined the coverage given corporate sponsorship/events marketing in several current promotion/advertising textbooks.
Introduction
Corporate sponsorship of sports, the arts, entertainment and causes has been recognized as marketing communications tool. In 1986, the International Events Group (IEG,) estimated the amount of sponsorship spending in North America at approximately $1 billion (Ukman, 1996). By 2005, sponsorship...., ABSTRACT:
The Global Earth Observation (GEO) Grid infrastructure is an E-Science infrastructure which enables global research activity and drives geosciences to get a significant discovery or achievement in their fields. The main design principal of the GEO Grid system is the open and standard protocol-based architecture. It supports creation of a virtual organization (VO) by integrating data and computing services according to the requirements by the VO. VO-level access control realizes flexible and scalable security infrastructure, against the increasing number of VOs and users. For extending the GEO Grid infrastructure, the number of resource providers should be more. Though the GEO Grid framework provides a facilitating tool of managing a GEO Grid site, building and operating a large storage system is one of the difficult tasks. For example, the ASTER storage which joins the GEO Grid system is...
Introduction
Air traffic controllers are currently engaged in a dialogue with various automated subsystems: they access databases of textual information, examine and interact with radar displays, receive and transmit flight information on hard copy, and communicate with pilots and other controllers over audio links. Many of these activities do not have the look and feel of dialogue, but convey the impression of working with a set of tools to perform a variety of tasks. Advances in computer technology over the last five to ten years reflect the increasingly successful use of this "tool metaphor," and it is likely that future, near-term Air Traffic Control (A TC) systems will continue to reflect this approach. In spite of the prevalence of "point-and-click," direct-manipulation environments, conceiving of a controller's interaction with sophisticated system software as "dialogue" has its advantages...
Abstract
Since 2000 there has been an increasing proportion of media markets in which individual stations have entered into agreements with varying levels of cooperation. These agreements are known, depending on their conditions, as shared services (SSA) agreements, local marketing/ management (LMA) agreements or local news sharing (LNS) agreements. Purportedly, these agreements are expected to help relieve some of the economic burdens that are shouldered by local stations in gathering and presenting news content. The implementation of these joint agreements, whether they involve simply sharing video to sharing news-gathering resources to overall management of the station, has implications for each of the fundamental principles on which the Federal Communications Commission regulates the broadcast industry---diversity, competition and localism. That is especially important now because the FCC is in the process of making decisions about media ownership that it postponed from 2010.... Introduction
Between the beginning of the al-Aqsa intifada in September 2000 and March 22, 2004, the Israeli Ministry of Foreign Affairs reports that Hamas was responsible for a lethal wave of approximately 425 attacks against Israeli citizens and their interests, resulting in nearly 2500 injured or killed. It is remarkable that a single organization had the organizational capacity to perpetrate such a concerted, sustained wave of attacks. Indeed, over the course of the four years, attacks occurred nearly every four days and, on average, harmed more than five individuals each time. This is contrasted with the more grassroots Swords of Truth, a militant, religious Palestinian group that detonated bombs at nightclubs that caused damage, but no injuries. How does a violent non-state group like Hamas coordinate to achieve these types of ends? More specifically, what factors make it possible for a group...
Abstract
Unauthorized copying of movies is a major concern for the motion picture industry. While unauthorized copies of movies have been distributed via portable physical media for some time, low-cost, high-bandwidth Internet connections and peer-topeer file sharing networks provide highly efficient distribution media. Many movies are showing up on file sharing networks shortly after, and in some cases prior to, theatrical release. It has been argued that the availability of unauthorized copies directly affects theater attendance and DVD sales, and hence represents a major financial threat to the movie industry. Our research attempts to determine the source of unauthorized copies by studying the availability and characteristics of recent popular movies in file sharing networks. We developed a data set of 312 popular movies and located one or more samples of 183 of these movies on file sharing networks, for a total...
1.1. Introduction
A number of significant technology developments have occurred in the past few years that have enabled the digital playback and display of feature films at a level of quality commensurate with that of 35mm film release prints. These technology developments include the introduction of: high-resolution film scanners, digital image compression, high-speed data networking and storage, and advanced digital projection. The combination of these digital technologies has allowed many impressive demonstrations of what is now called “Digital Cinema” These demonstrations, however, have not incorporated all of the components necessary for a broad-based commercially viable Digital Cinema system. These demonstrations have created a great deal of discussion and confusion around defining the quality levels, system specifications, and the engineering standards necessary for implementing a comprehensive Digital Cinema system. Digital Cinema Initiatives, LLC (DCI) is the entity created by seven motion picture studios: Disney, Fox,... SITA Ground Network
Global SITA Ground Network
Service
Evolved over the past 50 years to provide network services to over 220 countries
Backbone of SITA business for communications and applications:
• airports Abstract:
The verification of aerospace structures, including full-scale fatigue and static test programs, is essential for structure strength design and evaluation. However, the current overall ground strength testing systems employ a large number of wires for communication among sensors and data acquisition facilities. The centralized data processing makes test programs lack efficiency and intelligence. Wireless sensor network (WSN) technology might be expected to address the limitations of cable-based aeronautical ground testing systems. This paper presents a wireless sensor network based aircraft strength testing (AST) system design and its evaluation on a real aircraft specimen. In this paper, a miniature, high-precision, and shock-proof wireless sensor node is designed for multi-channel strain gauge signal conditioning and monitoring. A cluster-star network topology protocol and application layer interface are designed in detail. To verify the functionality of the designed wireless sensor network for strength testing capability, a multi-point WSN based AST system is developed for static testing of a real aircraft undercarriage. Based on the designed wireless sensor nodes, the wireless ...
RF Communication Systems
• Simplex RF System
A radio technology that allows only one-way communication from a transmitter to a receiver
Examples: FM radio, Pagers, TV, One-way AMR systems
• Half-duplex RF Systems
We consider object tracking and monitoring implemented via the use of distributed wireless sensor networks. We view the signal processing and communications operations performed in such networks, in conjunction with the time constraints imposed on their signal processing objectives and the limited life-spans of their sensors. We identify some of the object identification and network monitoring functions that are embedded in such systems. We subsequently focus on a core algorithm whose various manifestations may serve effectively a variety of network functions, and propose its novel application for image and sound object tracking. We also propose a new distributed version of the algorithm for the monitoring of data rates in the network
1 Introduction
Object tracking and monitoring is currently extensively implemented by distributed wireless sensor networks whose architectures, operations, and performance demands are dictated by the tracking and monitoring objectives, but are also...
Introduction
From the introduction of the Intelligent Electronic Device (IED), we have had the ability to communicate with and extract information from these devices. The ability to intelligently communicate gives added value to the IED and as such, has hastened their implementation. As time has gone on, we have watched communities of these devices sprout up in the substation - typically with no concerted attempt to inter-communicate much less interoperate. As a result, a veritable “Tower of Babble” has arisen inside the substation. Attempts to date to achieve some semblance of common communication have focused around “Rosetta Stone” solutions whereby a translation module of software is located between the IED and host computer. Although this technique achieves today’s goals, translation hardware is usually required and creation of the translation module can be costly and time consuming. Another aspect is that revisions and generations of new IED’s have become a frequent occurrence demanding constant “stone cutting” and “chipping” of translation communication software. Newer IED The OECD Global Forum on Competition discussed Competition Issues in Television and Broadcasting in February 2013. This document includes an executive summary of that debate and the documents of the meeting: a background note by the Secretariat as well as written submissions by Bulgaria, Chile, Colombia,Congo, Croatia, Egypt, the European Union ,France, Greece, India, Indonesia, Ireland, Israel, Japan, Korea, Latvia, Lithuania, Mexico, the Netherlands, Peru, the Philippines, Poland, Romania, the Russian Federation, Singapore, South Africa, Spain, Chinese Taipei, Tunisia, Turkey, Ukraine, the United Kingdom, the United States, Venezuela , Zambia and BIAC. A note by Prof. Allan Fels and a detailed summary of the discussion are also included.
New technologies and the dynamic effects of convergence are changing the way consumers access audio-visual content. This adds considerable uncertainty to business planning, in particular concerning future demand, and implies the need to ensure a cautious...Indexing the Positions of Continuously Moving Objects
Satelles (a division of iKare Corporation) Time and Location
Overcoming Stressed Satellite Networks Using Alternative Communications
NASA – Moving Objects Database Technology for Ad-Hoc Querying and Satellite Data Retrieval of Dynamic Atmospheric Events
HVAC Sizing And Design Principles
Indexing And Querying Moving Objects Databases
Corporate Sponsorship in the Marketing Curriculum: A Preliminary Investigation
Evaluation Of Large-Scale Storage Systems For Satellite Data In Geo Grid
Intelligent Dialogue in Air Traffic Control Systems
Local TV News & Service Agreements: A Critical Look
Organizing for Resistance: How Group Structure Impacts the Character of Violence
Analysis of Security Vulnerabilities in the Movie Production and Distribution Process
Digital Cinema System Specification
SITA AIRCOM Service (VHF & Satellite)
• airlines
• passengers
• governmentDesign and Evaluation of a Wireless Sensor Network Based Aircraft Strength Testing System
RF Basics, RF for Non-RF Engineers
• Full-duplex RF Systems
A Core Algorithm for Object Tracking and Monitoring via Distributed Wireless Sensor Networks
Developing a Common Language for Intelligent Electronic Device Communication in the Substation
Competition Issues in Television and Broadcasting
