Global ETD Search

1	Software Design of A Task-level High Level Synthesis Method Jian, Jia-Dau 07 September 2004 (has links) Along with the development of VLSI technology and the trend of system-on-chip design, traditional high-level synthesis can not deal with relatively complexity of system-on-chip design. In order to achieve optimal resource allocation, meet its performance and power requirements, and reduce its design time, we need a high-level synthesis software dealing system-level behavior. In consideration of system complexity, we have proposed a high-level synthesis method that synthesis for the task-level grains in a system behavior. This method performs efficient task-level resource allocation, task binding and task scheduling to reach a system design that meets the low performance and power requirements with low implementation cost. We utilize simulated annealing technique to achieve its overall system optimization. We designed and implemented the software design of the task-level high-level synthesis method. In this research, the design consists of three modules: the initial synthesis module, the heuristic movement module and the performance evaluation module. We will use the software to carry out the experiments of the task-level high-level synthesis method on application systems to verify its capability in designing systematic chips. task scheduling High Level Synthesis Task-level
2	A World Wide Web Interface for Automated Spacecraft Operation Kitts, Christopher, Tillier, Clemens 10 1900 (has links) International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California / A ground based intelligent agent and operations network is being created to handle all aspects of spacecraft command and control. This system will have the dual purpose of enabling cost efficient operation of a number of small satellites and serving as a flexible testbed for the validation of space system autonomy strategies. The system is currently being targeted to include over a dozen globally distributed amateur radio ground stations and access to nearly ten spacecraft. The use of distributed computing systems and virtual interaction schemes are significantly contributing to the creation of this system. The Internet is used to link the network's control centers and ground stations. In addition, a World Wide Web (WWW) based user and operator interface is being developed to permit high level goal specification of spacecraft experiments and actions. This paper will describe the operating network being developed, the use of the Internet as an integral part of the system's architecture, the design of the WWW interface, and the future development of the system. Human computer interface Visualization Spacecraft operations Goal/task level control Automation
3	A Brain Robot Interface for Autonomous Activities of Daily Living Tasks Pathirage, Don Indika Upashantha 15 July 2014 (has links) There have been substantial improvements in the area of rehabilitation robotics in the recent past. However, these advances are inaccessible to a large number of people with disabilities who are in most need of such assistance. This group includes people who are in a severely paralyzed state, that they are completely "locked-in" in their own bodies. Such persons usually retain full cognitive abilities, but have no voluntary muscle control. For these persons, a Brain Computer Interface (BCI) is often the only way to communicate with the outside world and/or control an assistive device. One major drawback to BCI devices is their low information transfer rate, which can take as long as 30 seconds to select a single command. This can result in mental fatigue to the user, specially if it necessary to make multiple selections over the BCI to complete a single task. Therefore, P300 based BCI control is not efficient for controlling a assistive robotic device such as a robotic arm. To address this shortcoming, a novel vision based Brain Robot Interface (BRI) is presented in this thesis. This visual user interface allows for selecting an object from an unstructured environment and then performing an action on the selected object using a robotic arm mounted to a power wheelchair. As issuing commands through BCI is slow, this system was designed to allow a user to perform a complete task via a BCI using an autonomous robotic system while issuing as few commands as possible. Furthermore, the new visual interface allows the user to perform the task without losing concentration on the stimuli or the task. In our interface, a scene image is captured by a camera mounted on the wheelchair, from which, a dynamically sized non-uniform stimulus grid is created using edge information. Dynamically sized grids improve object selection efficiency. Oddball paradigm and P300 Event Related Potentials (ERP) are used to select stimuli, where the stimuli being each cell in the grid. Once selected, object segmentation and matching is used to identify the object. Then the user, using BRI, chooses an action to be performed on the object by the wheelchair mounted robotic arm (WMRA). Tests on 8 healthy human subjects validated the functionality of the system. An average accuracy of 85.56% was achieved for stimuli selection over all subjects. With the proposed system, it took the users an average of 5 commands to perform a task on an object. The system will eventually be useful for completely paralyzed or locked-in patients for performing activities of daily living (ADL) tasks. Assistive Robotics Brain Computer Interface Object Selection Rehabilitation Robotics Task Level Control Computer Engineering Robotics
4	Automatic Task Formation Techniques for the Multi-level Computing Architecture Stewart, Kirk 30 July 2008 (has links) The Multi-Level Computing Architecture (MLCA) is a multiprocessor system-on-chip architecture designed for multimedia applications. It provides a programming model that simplifies the process of writing parallel applications by eliminating the need for explicit synchronization. However, developers must still invest effort to design applications that fully exploit the MLCA’s multiprocessing capabilities. We present a set of compiler techniques to streamline the process of developing applications for the MLCA. We present an algorithm to automatically partition a sequential application into tasks that can be executed in parallel. We also present code generation algorithms to translate annotated, sequential C code to the MLCA’s programming model. We provide an experimental evaluation of these techniques, performed with a prototype compiler based upon the open-source ORC compiler and integrated with the MLCA Optimizing Compiler. This evaluation shows that the performance of automatically generated code compares favourably to that of manually written code. compiler optimization task-level parallelism multimedia automatic parallelization software programming 0984
5	Automatic Task Formation Techniques for the Multi-level Computing Architecture Stewart, Kirk 30 July 2008 (has links) The Multi-Level Computing Architecture (MLCA) is a multiprocessor system-on-chip architecture designed for multimedia applications. It provides a programming model that simplifies the process of writing parallel applications by eliminating the need for explicit synchronization. However, developers must still invest effort to design applications that fully exploit the MLCA’s multiprocessing capabilities. We present a set of compiler techniques to streamline the process of developing applications for the MLCA. We present an algorithm to automatically partition a sequential application into tasks that can be executed in parallel. We also present code generation algorithms to translate annotated, sequential C code to the MLCA’s programming model. We provide an experimental evaluation of these techniques, performed with a prototype compiler based upon the open-source ORC compiler and integrated with the MLCA Optimizing Compiler. This evaluation shows that the performance of automatically generated code compares favourably to that of manually written code. compiler optimization task-level parallelism multimedia automatic parallelization software programming 0984
6	A feedback model for the evaluation of the adaptive changes to temporal muscle activation patterns following postural disturbance Welch, Torrence David Jesse 08 July 2008 (has links) Humans perform complex sensorimotor tasks, such as walking on uneven terrain, in a seemingly effortless manner. However, even simple voluntary tasks, like lifting the arm to shake hands, require intricate adjustments to maintain balance. With experience, humans learn to produce the appropriate patterns of muscle activity necessary to maintain balance during everyday activities, as well as highly specialized motor tasks. Here, I investigated the neural feedback mechanisms controlling the formation of the muscle activity used during balance tasks. I hypothesized that humans use feedback from on-going balance perturbations to establish their muscular responses. Specifically, I investigated center-of-mass (CoM) kinematics as a control signal for the formation of these muscle activation patterns. Using an inverted pendulum model under delayed feedback control, I both reconstructed the temporal EMG patterns measured during experimental perturbations and predicted the optimal EMG patterns for responding to the same perturbations. By modulating four feedback parameters, this feedback law accounted for 91% of the variability in all experimentally-recorded EMG patterns - regardless of the mechanical action of the muscle or the response strategy chosen by the subject. To investigate the changes in postural control during motor learning, I used this feedback model to characterize responses while naïve subjects adapted to repetitive unidirectional and reversing perturbations. By adjusting feedback gains related to CoM velocity and displacement, subjects adapted their muscle activity to improve control over the CoM for both perturbation types. Though subjects were unable to use anticipatory strategies to reduce muscle onset latency or to mute inappropriate responses to reversing perturbations, more subtle feedforward adjustments to feedback-mediated postural responses were evident. With experience, subjects adapted their postural responses toward the optimal solution. The results of this work, when combined with on-going studies of muscle synergies, will provide a powerful tool for investigating the consequences that result from the changes in spatiotemporal muscle activity associated with aging, neurological dysfunction, musculoskeletal injury, and specialized training programs. This quantitative knowledge is critical to the development of diagnostic tools for balance and movement disorders, as well as for the design of effective interventional therapies, bipedal robots, and neural prostheses. Task-level feedback Biomechanics Electromyogram (EMG) Adaptation Computer simulation Motor learning Kinematics Response scaling Balance Postural control Optimal control Feedforward control Posture Muscles Movement disorders
7	Data Transformation Trajectories in Embedded Systems Kasinathan, Gokulnath January 2016 (has links) Mobile phone tracking is the ascertaining of the position or location of a mobile phone when moving from one place to another place. Location Based Services Solutions include Mobile positioning system that can be used for a wide array of consumer-demand services like search, mapping, navigation, road transport traffic management and emergency-call positioning. The Mobile Positioning System (MPS) supports complementary positioning methods for 2G, 3G and 4G/LTE (Long Term Evolution) networks. Mobile phone is popularly known as an UE (User Equipment) in LTE. A prototype method of live trajectory estimation for massive UE in LTE network has been proposed in this thesis work. RSRP (Reference Signal Received Power) values and TA(Timing Advance) values are part of LTE events for UE. These specific LTE events can be streamed to a system from eNodeB of LTE in real time by activating measurements on UEs in the network. AoA (Angle of Arrival) and TA values are used to estimate the UE position. AoA calculation is performed using RSRP values. The calculated UE positions are filtered using Particle Filter(PF) to estimate trajectory. To obtain live trajectory estimation for massive UEs, the LTE event streamer is modelled to produce several task units with events data for massive UEs. The task level modelled data structures are scheduled across Arm Cortex A15 based MPcore, with multiple threads. Finally, with massive UE live trajectory estimation, IMSI (International mobile subscriber identity) is used to maintain hidden markov requirements of particle filter functionality while maintaining load balance for 4 Arm A15 cores. This is proved by serial and parallel performance engineering. Future work is proposed for Decentralized task level scheduling with hash function for IMSI with extension of cores and Concentric circles method for AoA accuracy. / Mobiltelefoners positionering är välfungerande för positionslokalisering av mobiltelefoner när de rör sig från en plats till en annan. Lokaliseringstjänsterna inkluderar mobil positionering system som kan användas till en mängd olika kundbehovs tjänster som sökning av position, position i kartor, navigering, vägtransporters trafik managering och nödsituationssamtal med positionering. Mobil positions system (MPS) stödjer komplementär positions metoder för 2G, 3G och 4G/LTE (Long Term Evolution) nätverk. Mobiltelefoner är populärt känd som UE (User Equipment) inom LTE. En prototypmetod med verkliga rörelsers estimering för massiv UE i LTE nätverk har blivit föreslagen för detta examens arbete. RSRP (Reference Signal Received Power) värden och TA (Timing Advance) värden är del av LTE händelser för UE. Dessa specifika LTE event kan strömmas till ett system från eNodeB del av LTE, i realtid genom aktivering av mätningar på UEar i nätverk. AoA (Angel of Arrival) och TA värden är använt för att beräkna UEs position. AoA beräkningar är genomförda genom användandet av RSRP värden. Den kalkylerade UE positionen är filtrerad genom användande av Particle Filter (PF) för att estimera rörelsen. För att identifiera verkliga rörelser, beräkningar för massiva UEs, LTE event streamer är modulerad att producera flera uppgifts enheter med event data från massiva UEar. De tasks modulerade data strukturerna är planerade över Arm Cortex A15 baserade MPcore, med multipla trådar. Slutligen, med massiva UE verkliga rörelser, beräkningar med IMSI(International mobile subscriber identity) är använt av den Hidden Markov kraven i Particle Filter’s funktionalitet medans kravet att underhålla last balansen för 4 Arm A15 kärnor. Detta är utfört genom seriell och parallell prestanda teknik. Framtida arbeten för decentraliserade task nivå skedulering med hash funktion för IMSI med utökning av kärnor och Concentric circles metod för AoA noggrannhet. Angle of Arrival Hidden Markov Model Particle Filter Arm A15 MPcore Parallel Programming Real time task level scheduler Angle of Arrival Hidden Markov Model Particle Filter Arm A15 MPcore Parallel Programming Real time task level scheduler Computer and Information Sciences Data- och informationsvetenskap
8	En studie i elevmotivation genom självreglerande lärande som metod för inlärning i moderna språk / A study on Learner Motivation by means of Learner Autonomy as Studying Technique in Modern Language Learning Gehrke, Karina Wiebke January 2022 (has links) Onödiga språkvalsbyten i moderna språk kan anses vara resultat av motivationsbrist kopplat till intrycket att glädje i språkvalsstudier inte leder till gymnasiebehörighet. Denna studie ämnar undersöka och fördjupa kunskap om a) samband mellan självreglering och elevmotivation, samt b) samband mellan glädje och motivation. Hattie och Zierer (2019) konstaterar att mer självreglering leder till ökad elevmotivation. För att pröva om denna slutsats kan verifieras, genomfördes en empirisk studie med lärarintervjuer som besvarade följande fråga: Vad anser lärare är en bra återkoppling till eleverna? För att kunna nå en slutsats i frågan om samband mellan självreglering och elevmotivation etablerades först en definition av begreppet självreglering. I detta syfte användes en teori som står för uppsatsens analytiska ramverk. Ramverket baseras på författare som arbetar i linje med Richard M. Ryans och Edward L. Decis Self-Determination Theory (SDT). Då slutsatsen att mer självreglerande lärande leder till ökad elevmotivation inte kunde verifieras i min empiriska studie, genomfördes en noggrann litteraturstudie. Utifrån denna kunde jag sedan göra en analys av mina frågeställningar med anslutande diskussion. Resultatet antyder att lärare bör fokusera på elevmotivationens kvalitet, med den prototypiska intrinsiska motivationen som mål, för att kunna motverka motivationsbristen i skolan. I detta forskningsarbete kom jag dessutom fram till slutsatsen att en högre motivation i allra högsta grad kan leda till ett mer effektivt lärande i allmänhet. Nyckelord: effektivt lärande, elevmotivation, intrinsisk motivation, motivationsbrist, Self-Determination Theory, självreglering, återkoppling formative assessment learner autonomy Self-Determination Theory motivation language studies language learner autonomy SDT intrinsic motivation extrinsic motivation learning motivation self-regulation student motivation modern languages language learning formative feedback self-regulated learning effective learning task level process level self-regulation level feedback long-term goals learning goals high school eligibility curriculum primary school language choice multilingual society result-oriented curriculum learning system language skills curriculum in modern languages upper secondary school motivation difficulty motivation problem German lack of motivation planning phase implementation phase self-reflection phase metacognition metacognitive strategy metacognitive process thought process visible learning controlled learning autonomous self-regulation sense of autonomy social values personal values self-regulation style identified regulation integrated regulation SDT work method self-reflection goal setting learning activity formative Motivation im Unterricht Lernermotivation Autonomie Fremdsprachenunterricht Formative Diagnostik Lernerautonomie Lernmotivation Selbstregulation Autonomie Schülermotivation moderne Sprachen Sprachenlernen formative Beurteilung formatives Feedback selbstgesteuertes Lernen effektives Lernen Freude am Lernen Aufgabenebene Prozessebene Selbstregulationsebene Feedback Lernziele Lehrplan Grundschule mehrsprachige Gesellschaft ergebnisorientierter Lehrplan Lernsystem Sprachkompetenz Lehrplan in Moderne Sprachen Sekundarstufe II Motivationsschwierigkeit Motivationsproblem Fach Deutsch DaF Motivationsmangel Planungsphase Umsetzungsphase Selbstreflexionsphase Metakognition metakognitive Strategien metakognitiver Prozess Denkprozess sichtbares Lernen intrinsische Motivation extrinsische Motivation kontrolliertes Lernen autonome Selbstregulation Autonomiegefühl soziale Werte persönliche Werte Selbstregulationsstil identifizierte Regulation integrierte Regulation SDT Arbeitsmethode Selbstreflexion Zielsetzung Lernaktivität lärandemotivation självreglering autonomi elevmotivation moderna språk språkinlärning formativ bedömning formativ återkoppling självreglerande lärande effektivt lärande glädje i undervisning uppgiftsnivå processnivå självregleringsnivå återkoppling långsiktiga mål lärandemål gymnasiebehörighet läroplan språkvalslektion grundskola språkval flerspråkig samhälle resultatorienterad lärosystem språkkunskap kursplan i moderna språk högstadiet motivationssvårighet motivationsproblematik tyska motivationsbrist planeringsfas genomförandefas självreflektionsfas metakognition metakognitiv strategi metakognitiv process tankeprocess synligt lärande inneboende motivation yttre motivation kontrollerad autonom självreglering extrinsisk motivation intrinsisk motivation autonomikänsla sociala värden personliga värden självregleringsstil identifierad reglering integrerad reglering SDT arbetsmetod självreflektion målsättning inlärningsaktivitet formativ Learning Lärande

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