User Tracking System Research Articles

RRefined and Effective Integration of Access Control Mechanism in Blockchain Enabled DApp

The combination of the Internet of Things (IoT) and aviation integration with the help of satellite and 6G communication technologies has led to the Internet of Unmanned Aerial Vehicles (UAV) or Internet of Drones (IoD). To host and share large amounts of drone data in real time, cloud-based IoD algorithm Cloudbased IoD is the wrong choice to reduce the weight of mobile drones. However, how to protect the sensitive drone at the fair is a matter of curiosity, and it is very difficult to break the environment where drone use is available and limited resources are available. Although our previous work in SPNCE21 (PATLDAC) developed an air-on middle of the main load of based drone data access control system with privacy policy, limited access time and user tracking, it provides conflicting and centralized cloud data storage for cloud environment and access with unreliable data. It is not reliable in terms of data access and tracking of users. To this end, we propose a blockchainbased privacy data access control (BPADAC) scheme for distributed and secure drone data sharing on cloudbased IoDs. Building on the granular, traceable, and privacypreserving drone data access capabilities of our previous work, we extend this by using blockchain and decentralized hash tables (DHT) to provide secure and reliable wireless access to humanmachine data and storage. as well as reliable and limited access guarantee mechanisms for cloud drone data sharing services. We also set up a public and denial user tracking system to prevent user abuse and deny the traitor. Finally, we propose a prototype for security analysis and performance evaluation using smart contracts on the Ethereum blockchain to demonstrate the feasibility of BPADAC. hash table, attributebased ciphertext encryption policy, and blockchain-based privacy-protected enabled and aware data access control Key Words: Blockchain, UAV,IoD, Distributed Hash Table, Ciphertext-Policy-Attribute-Based-Encryption, blockchainbased privacy-aware data access control

Learning and engagement with an online laboratory for environmental monitoring education

ABSTRACT In this study, we investigated students’ learning outcomes and engagement with an online laboratory called Online Watershed Learning System (OWLS) employed within a classroom and explored the relationship between learning outcome and engagement. The OWLS is the web interface for a real-time environmental monitoring system and integrates a user-tracking system to track students’ interactions. We conducted a pre-experimental quantitative research study in a third-year Civil and Environmental Engineering course. We assessed students’ performance and perception of their learning, behavioural engagement, and their perception of engagement attributes in the context of environmental monitoring. Examples of key findings include: OWLS is effective in helping attain learning outcomes related to environmental monitoring, the order of assessment questions can impact students’ performance but not their engagement, and students’ performance is inversely related to the number of clicks they used to complete an OWLS-based task. The study informs the effective design of online laboratories and leverages online laboratories-based education.

Development of Aerial Interface by Integrating Omnidirectional Aerial Display, Motion Tracking, and Virtual Reality Space Construction

By combining an aerial display, user tracking system, and virtual reality (VR) space, we realized an aerial interface for providing both an immersive user experience and real-time communication with people outside the device. We developed a simple application for detecting user contact and changing the color of an object to measure the latency of our aerial interface system.

Multi-carrier based UAV data relaying and user tracking system

In the case of natural disaster or emergency rescue, unmanned aerial vehicle (UAV) can be dispatched to the target region and leveraged as aerial relay to track and serve users owning to flexible maneuverability and fast deployment. In this article, a multi-carrier based UAV data relaying and user tracking system is proposed in which the UAV adopts multi-carrier transmission and builds a communication connection from the reliable infrastructure to the target region in emergency. More specifically, a base station (BS) sends information to the UAV which can allocate sub-carriers to users, and then the UAV forwards information, tracks and serves users to ameliorate system performance. A downlink average achievable sum rate maximization-based joint optimization problem, including the UAV flight path, sub-carrier transmit power and user scheduling, is formulated with the information causality constraint. Since the formulated problem suffers from non-convexity, a three-step iterative algorithm is derived to approximate the optimal solution to the original problem by alternatively optimizing UAV flight path, sub-carrier transmit power and user scheduling. Simulation results show that the proposed algorithm can not only track mobile users dynamically, but also demonstrate the performance superiorities of the proposed scheme prominently.

An Indoor Tracking System using iBeacon and Android

Context-aware applications use context to provide relevant information and services to users with minimal user intervention with the system. User location is such a context for location-aware services. While in the outdoor location-aware systems Global Positioning System can provide the user location within the accuracy of 20 meters, it lacks to precisely determine user location for indoor tracking systems. Thus, different other techniques and mechanisms have been proposed for indoor tracking systems, such as trilateration, triangulation, fingerprinting etc. However, they have added disadvantages including high cost and high-power consumption. To overcome such problems, iBeacon is a low-cost, low-power solution for such indoor tracking systems. In this paper, we explore the use of iBeacon for user tracking in an indoor user tracking system with a prototype implementation and evaluate the system on some general use cases. The prototype serves as a prelude towards the goal of developing context-aware (in particular, location-aware) applications.

Demonstrations of Cooperative Perception: Safety and Robustness in Connected and Automated Vehicle Operations.

Cooperative perception, or collective perception (CP), is an emerging and promising technology for intelligent transportation systems (ITS). It enables an ITS station (ITS-S) to share its local perception information with others by means of vehicle-to-X (V2X) communication, thereby achieving improved efficiency and safety in road transportation. In this paper, we present our recent progress on the development of a connected and automated vehicle (CAV) and intelligent roadside unit (IRSU). The main contribution of the work lies in investigating and demonstrating the use of CP service within intelligent infrastructure to improve awareness of vulnerable road users (VRU) and thus safety for CAVs in various traffic scenarios. We demonstrate in experiments that a connected vehicle (CV) can “see” a pedestrian around the corners. More importantly, we demonstrate how CAVs can autonomously and safely interact with walking and running pedestrians, relying only on the CP information from the IRSU through vehicle-to-infrastructure (V2I) communication. This is one of the first demonstrations of urban vehicle automation using only CP information. We also address in the paper the handling of collective perception messages (CPMs) received from the IRSU, and passing them through a pipeline of CP information coordinate transformation with uncertainty, multiple road user tracking, and eventually path planning/decision-making within the CAV. The experimental results were obtained with manually driven CV, fully autonomous CAV, and an IRSU retrofitted with vision and laser sensors and a road user tracking system.

Mobile user tracking system with ZigBee

In the paper an implementation of mobile nodes tracking system based on ZigBee and Wi-Fi wireless networks is presented. On the base of known algorithmic as well as circuit solutions a simple yet universal system, applied in prototype application dedicated for person's localization in museum premises has been developed. Since system utilizes entirely wireless communication, it can be applied in any closed objects. The system has been preliminarily verified in real in-situ environment.

Interactive Visual Media for Geomorphological Heritage Interpretation. Theoretical Approach and Examples

Based on the argument that understanding is a key for raising awareness about geoheritage among non-specialists, this paper presents specific techniques for the interpretation of geomorphological features through the use of interactive visual media. It focuses on the use of interactive functions to go beyond the design or cartographic limits of classic visual media with the aid of interactivity, multimedia, and animation. The effects of these numerical technologies on learning are also discussed following results in media and cognitive psychology. To exemplify how technologies like interactivity or multimedia extend the possible uses of schemes and maps for geo-interpretation, three original web applications are presented. They are mash-ups (web application hybrid) of several tools such as web mapping, interactive vector drawing, animated schemes, pictures, etc. Each application also has a different level of interactivity and follows a specific educative approach, namely explanation, experimentation or exploration. This paper focuses only on the media part of interpretation. In order to follow a global approach of interpretation (presented in this paper), other aspects should be taken into account, in particular audience and message issues. In the second stage of the research, the use and appreciation of the web application will be tested by different audiences. For this purpose, a user tracking system has been implemented in the applications that will supplement the data obtained by questionnaires.

LC GRIN lens mode with wide viewing angle for rotatable 2D/3D tablet

AbstractTo widen the vertical and horizontal angular ranges where the lens performs well, the off‐axis performance of a liquid crystal gradient index (LC GRIN) lens is analyzed by the combined simulation system of an LC director simulator and a ray‐tracing simulator. We found that the angular difference between an LC alignment direction and an electrode array direction of the LC GRIN lens is one of significant parameters, and detailed conditions of structure are established. The measurement result shows that the developed structure reduces the degradation ratio in a luminance profile from 61% to 3.2%. We have applied a user tracking system for the rotatable 3D display, equipped with a detection of a panel orientation and a face position. As a result, we have developed a rotatable 2D/3D tablet whose 3D viewing azimuth angle is over 30° in both landscape and portrait orientations.

Computer Assisted Vocabulary Learning: Framework and Tracking Users’ data

It is proposed that CAVL applications can be divided into two broad categories: lexical programs/tasks and lexical resources/aids. There are three major types of lexical resources/aids: open Google searches, electronic dictionaries and lexical concordancers; they provide learners with access to meaning and other lexical information about the unknown items encountered during the learning process. Lexical programs/tasks can be further divided into four types: incidental learning with lexical glosses, CMC lexical-based tasks, computerized vocabulary exercises, and dedicated CAVL programs. Such a distinction is made based on the prominence each gives to vocabulary learning in terms of tool/tutor, implicit/explicit learning and meaning/form focusing. Equally important is the user tracking system built into each application, as tracking data can reveal how learners actually interacted with the learning system (Fischer, 2007; 2012). A review of tracking systems used in CAVL shows that multiple technologies/means have been used in tracking user actions and further research needs to focus on the identification of the key user actions related to learning outcome. Only with a good tracking system, can CALL effectiveness be proven, useful design features be identified and the appropriate programs be selected.

GPO Gate University of California, San Diego's New Gateway to electronic government information

Over the past year, a team of librarians and computer analysts at the University of California (UC), San Diego developed a new interface for accessing the Government Printing Office's WAIS databases, collectively known as GPO Access. GPO Access has been an important development in the delivery of government information. UC San Diego's new World Wide Web interface, called GPO Gate, provides a powerful, user-friendly method of searching and retrieving full-text government information from GPO access. GPO Gate is now the University of California's system-wide gateway for GPO Access. The GPO Gate team instituted two mechanisms to monitor database usage: a user-tracking system and a user survey. The user-tracking system logs the number of uses, searches, and retrievals by domain type and identifies users by the database used. Since its inception in August 1995, use of GPO Gate has increased dramatically. Much of the increase can be attributed to searches and retrievals from the Federal Register. The largest single user group is composed of commercial users. The increased use of GPO Gate has many implications for public service related to government documents, including an expansion of the number of users, the need for reference providers to better understand computer hardware and software, and confusion among users caused by rapid changes in the delivery of government information.