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Advances in wireless multimedia sensor networks (WMSNs) stimulated interest in designing lightweight solutions in terms of processing and energy consumption for traditional problems due to severe resources constraints on camera sensors. Finding the exact object location is one of such traditional problems which has been well studied in the past. However, the proposed solutions mostly involve complex...
In this study, a novel dynamic path planning approach is proposed for multi-robot sensor-based coverage considering energy capacities of the mobile robots. The environment is assumed to be narrow and partially unknown. A Generalized Voronoi diagram-based network is used for the sensor-based coverage planning due to narrow nature of the environment. On the other hand, partially unknown nature is handled...
In this paper, an approximation of a double integral over a triangular region using a Romberg-like buffered extrapolation technique is considered. A master-worker algorithm organization was developed and implemented using the message passing interface (MPI) paradigm which aims at computing the function f(x,y) at the nodes of the triangle by the worker processes in parallel. The algorithm is implemented...
Named entities are known to be important means for semantic annotation of news texts. Considerable work has been carried out for semantic indexing of both textual news and news videos especially in English through the employment of named entities extracted from textual news or transcriptions of the news videos. In this paper, we present our semantic retrieval architecture for news videos in Turkish...
Use of multiple transmit and receive antennas have become a popular research area in radar community after the success of the same concept in communication. It is shown by Fishler et al. that multi-input multi-output (MIMO) radar has considerable advantages compared to traditional radar and phased array radar systems. In this paper, detection performance of MIMO radar using Neyman-Pearson detector...
In this study, a novel sensor-based coverage algorithm is proposed for multi-robots considering energy capacities of the mobile robots. Firstly, the environment is modeled by a Generalized Voronoi diagram-based graph to guarantee complete sensor based coverage. Secondly, depending on required arc set, an initial complete coverage route is created by using Chinese postman problem (CPP) and/or rural...
Minimizing the coverage task time is important for many sensor-based coverage applications. The completion time of a sensor-based coverage task is determined by the maximum time traveled by a robot in a mobile robot group. So the environment needs to be partitioned among robots considering their travel times. Most of the coverage algorithms results in sharp turns which require the robot to slow down,...
Wireless sensor networks are application-specific networks, and usually a new network design is required for a new application. In event-driven wireless sensor network applications, the sink node of the network is generally concerned with the higher level information describing the events happening in the network, not the raw sensor data of individual sensor nodes. As the communication is a costly...
This paper describes the development of a generated solution for classification and segmentation of broadcast news audio. A sound stream is segmented by classifying each sub-segment into silence, pure speech, music, environmental sound, speech over music, and speech over environmental sound classes in multiple steps. Support Vector Machines and Hidden Markov Models are employed for classification...
In this paper, a vector-projection-based algorithm is developed to detect obstacles in narrow environments. This algorithm can be used for especially sensor-based coverage problems. The algorithm distinguishes the obstacles from the walls around the robot. Sonar vectors are projected on the edge which the robot moves to detect the obstacles. After detecting the obstacle, the size and location of the...
In this study, a path smoothing strategy is proposed for sensor-based coverage problems. Smooth paths are generated for the coverage problems considering mobile robot kinematics constraints. An open agent architecture-based control structure is used to implement the proposed approach on real robots. The algorithm is coded with C++ and implemented on P3-DX mobile robots in MobileSim simulation environments...
Similar to verse and chorus sections that appear as repetitive structures in musical audio, key-concept (or topic) of some speech recordings (e.g., presentations, lectures, etc.) may also repeat itself over the time. Hence, accurate detection of these repetitions may be helpful to the success of automatic speech summarization. Based on this motivation, we consider the applicability of music structural...
People can benefit from todaypsilas video archives of huge sizes only through appropriate and effective ways of querying the video data. In order to query the video data through high-level semantic entities such as objects, events, and relations, these entities should be properly extracted and the corresponding video shots should be annotated accordingly. Video texts, which comprise the caption texts...
In this paper we provide an overview of the simulation and testing environments developed for the Ohio State Universitypsilas DARPA Urban Challenge vehicle OSU-ACT (Autonomous City Transport). These environments were used in the research and development process of the actual challenge vehicle, and also extended for classroom teaching purposes and for general autonomous vehicle research.
The role of customers and other stakeholders is becoming increasingly significant during requirement engineering activities. Methods of eliciting requirements are now more co-operative. There are many techniques to obtain requirements from customers. Selecting the right techniques according to the characteristics of the project is very important. In some complex problems, combination of requirement...
Data warehousing (DW) provides an excellent approach in transforming operational data into useful and reliable information to support the decision making process in any organization. In this paper, a case study is performed to implement a DW. This case-study is used to describe and compare various conceptual and logical design models for data warehousing. This comparison is done to find which of the...
Content-based retrieval of multimedia data has still been an active research area. The efficient retrieval in natural images has been proven a difficult task for content-based image retrieval systems. In this paper, we present a system that adapts two different index structures, namely Slim-Tree and BitMatrix, for efficient retrieval of images based on multidimensional low-level features such as color,...
The 2007 urban challenge, hosted by the U.S. Defense Advanced Research Projects Agency (DARPA), featured autonomous vehicle technology in an urban environment. This paper presents the route planning module for the vehicle developed by the Ohio State University Autonomous City Transport (OSU-ACT) team. Based on given information of the urban road network, this module is able to search for optimal routes...
This study proposed a traffic responsive urban traffic control system using RFID(radio frequency identification) technology to get traffic information. The proposed system is a decentralized control using model predictive control. The objective of the proposed system is to obtain traffic data using advanced technology for controlling the junctions' traffic rights. A simulation example is provided...
A fuzzy object-oriented data model is a fuzzy logic-based extension to an object-oriented database model that permits uncertain data to be explicitly represented. The fuzzy object-oriented database (FOOD) model is one of the proposed models in the literature to handle uncertainty in object-oriented databases. Several kinds of fuzziness are dealt with in the FOOD model, including fuzziness at attribute...
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