Global ETD Search

11	Evaluating Multi-Uav System with Text to Spech for Sitational Awarness and Workload Lindgren, Viktor January 2021 (has links) With improvements to miniaturization technologies, the ratio between operators required per UAV has become increasingly smaller at the cost of increased workload. Workload is an important factor to consider when designing the multi-UAV systems of tomorrow as too much workload may decrease an operator's performance. This study proposes the use of text to speech combined with an emphasis on a single screen design as a way of improving situational awareness and perceived workload. A controlled experiment consisting of 18 participants was conducted inside a simulator. Their situational awareness and perceived workload was measured using SAGAT and NASA-TLX respectively. The results show that the use of text to speech lead to a decrease in situational awareness for all elements inside the graphical user interface that were not directly handled by a text to speech event. All of the NASA-TLX measurements showed an improvement in perceived workload except for physical demand. Overall an improvement of perceived workload was observed when text to speech was in use. Text to Speech TTS UAV Drone Unmanned Aerial Vehicle SAGAT NASA-TLX Workload Situational Awarness Aerospace Engineering Rymd- och flygteknik Robotics Robotteknik och automation
12	Measuring a Platoon Commander's Performance in a Complex, Dynamic and Information Rich Environment / Mätning av en Plutonchefs Prestation i en Komplex, Dynamisk och Informationsrik Miljö Melbi, Alexander January 2021 (has links) Command and control (C2) environments are complex, dynamic and rich in information. Thus, measuring the performance of an agent in a C2-system, in this case a platoon commander, poses a challenging task for the researcher. To measure the performance of a platoon commander in this thesis, the OODA loop is used as a model for representing the four processes in which the platoon commander is engaged in during a military C2 mission. In accordance with these processes, performance measurements for the platoon commander are identified. The relevance of the performance measurements, to the C2 tasks and goals of the platoon commander, are tested through three studies conducted in a simulated warfare scenario, and two workshops, one with a platoon commander and one with two scientists. As a result of the studies and workshops, an assessment tool for measuring the C2 tasks and goals of the platoon commander, is developed. This assessment tool consists of modified versions of the Crew Awareness Rating Scale (CARS), the Situation Awareness Global Assessment Technique (SAGAT) and the NASA-Task Load Index (NASA-TLX), as well as generic performance measurements measuring fratricide, deaths and completion of overarching goal. C2 command and control platoon commander performance measurements human factors CARS SAGAT NASA-TLX OODA virtual battle space 3 first person shooter military Applied Psychology Tillämpad psykologi
13	Testing the Lumberjack Analogy: Automation, Situational Awareness, and Mental Workload Morgan, Justin W. 30 August 2022 (has links) No description available. Psychology Mental Workload MWL NASA-TLX Situational Awareness SA SART Automation Degree of Automation Failure Automation Failure RESCHU Supervisory Control UAV Lumberjack Lumberjack Analogy Black Swan
14	Effects of Subjective Workload Measurement During a Workload Transition on Task Performance Bowers, Drew 26 August 2014 (has links) No description available. Experimental Psychology SWAT S-SWAT Simplified SWAT Subjective Workload Assessment Technique Vigilance NASA-TLX NASA Task Load Index Workload Transition Workload Sustained Attention
15	Impact of Binaural Beat Technology on Vigilance Task Performance, Psychological Stress and Mental Workload Shoda, Elizabeth Ann 08 November 2013 (has links) No description available. Psychology binaural beats audio BBT BB brainwave entrainment BWE beta binaural beats vigilance vigilance decrement decrement function event rate psychological stress stress mental workload NASA-TLX SSSQ SAS
16	Human Fatigue in Prolonged Mentally Demanding Work-Tasks: An Observational Study in the Field Ahmed, Shaheen 17 August 2013 (has links) Worker fatigue has been the focus of research for many years. However, there is limited research available on the evaluation and measurement of fatigue for prolonged mentally demanding activities. The objectives of the study are (1 )to evaluate fatigue for prolonged, mentally demanding work-tasks by considering task-dependent, task-independent and personal factors, (2) to identify effective subjective and objective fatigue measures, (3) to establish a relationship between time and factors that affect fatigue (4) to develop models to predict fatigue. A total of 16 participants, eight participants with western cultural backgrounds and eight participants with eastern cultural backgrounds, currently employed in mentally demanding work-tasks (e.g., programmers, computer simulation experts, etc.) completed the study protocols. Each participant was evaluated during normal working hours in their workplace for a 4-hour test session, with a 15-minute break provided after two hours. Fatigue was evaluated using subjective questionnaires (Borg Perceived Level of Fatigue Scale and the Swedish Occupational Fatigue Index (SOFI)); and objective measures (change in resting heart rate and salivary cortisol excretion). Workload was also assessed using the NASA-TLX. Fatigue and workload scales were collected every 30 minutes, cortisol at the start and finish of each 2-hour work block, and heart rate throughout the test session. Fatigue significantly increased over time (p-value <0.0001). All measures, except cortisol hormone, returned to near baseline level following the 15-minute break (p-value <0.0001). Ethnicity was found to have limited effects on fatigue development. Poor to moderate (Rho = 0.35 to 0.75) significant correlations were observed between the subjective and objective measures. Time and fatigue load (a factor that impacts fatigue development) significantly interact to explain fatigue represented by a hyperbolic relationship. Predictive models explained a maximum of 87% of the variation in the fatigue measures. As expected, fatigue develops over time, especially when considering other factors that can impact fatigue (e.g. hours slept, hours of work), providing further evidence of the complex nature of fatigue. As the 15-minute break was found to reduce all measures of fatigue, the development of appropriate rest breaks may mitigate some of the negative consequences of fatigue. Fatigue Load Duration Time Work-related Ethnicity Workload Borg SOFI NASA-TLX Cortisol Heart Rate Human Fatigue Mental Cognitive Sedentary Work-task Rest-break Prolonged Computer Programming Simulation Mentally Demanding Stepwise Regression Fatigue Model
17	The Use of Physiological Data and Machine Learning to Detect Stress Events for Adaptive Automation Falkenberg, Zachary 26 July 2023 (has links) No description available. Aerospace Engineering Engineering Adaptive automation machine learning human factors aviation automation physiological data Physiological measures overuse of automation over reliance on automation NASA TLX NASA Task Load Index ECG EDA fEMG Neural Network
18	A THEORETICAL ADAPTIVE AUTONOMY MODEL:REAL-TIME PHYSIOLOGICAL ASSESSMENT OF COGNITIVE WORKLOAD Evans, Dakota C. January 2014 (has links) No description available. Industrial Engineering Physiological Psychology Experiments
19	Pekskärmar i turbulenta miljöer : I vilken utsträckning kan precision upprätthållas / Touchscreens in turbulent conditions : To what extent is precision possible Eriksson, Alexander January 2013 (has links) Pekskärmar används i allt större utsträckning som interaktionsteknik för hemelektronik. Tekniken har traditionellt sett inte använts i krävande miljöer, exempelvis i miljöer där skakningar och g-laster förekommer. Introduktionen av pekskärmsteknologi i cockpitmiljö får konsekvenser för utformningen av förarmiljön vilka bör utredas. Denna studie syftade till att empiriskt utvärdera användarnas prestation med avseende på precision vid olika interaktionsmanövrar på en pekskärm. Fyra försök genomfördes med 14 försöksdeltagare i en simulerad miljö där olika grader av skakningar förekom. Precisionsmätningar genomfördes i samband med försöken och försöksdeltagarnas subjektivt upplevda arbetsbelastning mättes med hjälp av NASAs självskattningsformulär för upplevd arbetsbelastning (TLX). Korrelationsanalyser genomfördes mellan försöksdeltagarnas subjektiva arbetsbelastning och data från försöken. Det genomfördes också differensanalyser mellan försökens olika betingelser för att se om det förekom någon inlärningseffekt. Testresultaten visar att relativt god precision går att uppnå vid interaktion med pekskärm men att vissa typer av interaktion är svårare och skattas högre med avseende på arbetsbelastning än andra. Resultatet från en inledande workshop med förare och ingenjörer visar på en positiv inställning till pekskärmar som komplement till inmatning i cockpit. Rapporten ger rekommendationer för utformningen av gränssnitt för pekskärm för att undvika interaktionsproblem vid skakningar och g-laster. / Touchscreens are a common occurrence in everyday applications these days. The technology is not traditionally used in high hazard environments, in example where vibrations and G-forces is frequently occurring. The consequences of introducing touchscreens to the cockpit environment are something to consider when designing the pilot environment. The purpose of this study is to empirically evaluate the user performance and precision when interacting with touchscreens. Four tests were conducted with 14 trial participants in a semi-controlled environment where varying degrees of vibrations occurred. Measurements of the participants’ precision were measured together with a subjective workload measure developed by NASA (TLX). Correlation analyses were carried out between the experimental participants’ subjective workload and data from the experiments. The difference in precision and performance was also analysed between the precision tests to see if there was any learning effects. The test results show that good precision was possible to some extent but that some types of interaction is more difficult then others hence increasing workload for the participants. The results of an initial workshop with pilots and engineers show a positive attitude towards touchscreens as complement for the currently available input methods. The report provides recommendations for the design of touchscreen interfaces to avoid issues caused by shaking and g-loads. Aviation Aeronautics Turbulent conditions Interaction Precision Touchscreen interaction Touchscreens Workload Erconomics Human machine interaction HMI Human factors Flyg Flygteknik Pekskärmar turbulent miljö Interaktion Precision Pekskärm Pekskärmsinteraktion NASA-TLX Arbetsbelastning Ergonomi Människa teknik interaktion människa teknik organisation HMI MTO Human Computer Interaction
20	Interaktionskvalitet - hur mäts det? Friberg, Annika January 2009 (has links) Den tekniska utvecklingen har lett till att massiva mängder av information sänds, i högahastigheter. Detta flöde måste vi lära oss att hantera. För att maximera nyttan av de nyateknikerna och undkomma de problem som detta enorma informationsflöde bär med sig, börinteraktionskvalitet studeras. Vi måste anpassa gränssnitt efter användaren eftersom denneinte har möjlighet att anpassa sig till, och sortera i för stora informationsmängder. Vi måsteutveckla system som gör människan mer effektiv vid användande av gränssnitt.För att anpassa gränssnitten efter användarens behov och begränsningar krävs kunskaperom den mänskliga kognitionen. När kognitiv belastning studeras är det viktigt att en såflexibel, lättillgänglig och icke-påträngande teknik som möjligt används för att få objektivamätresultat, samtidigt som pålitligheten är av största vikt. För att kunna designa gränssnittmed hög interaktionskvalitet krävs en teknik att utvärdera dessa. Målet med uppsatsen är attfastställa en mätmetod väl lämpad för mätning av interaktionskvalitet.För mätning av interaktionskvalitet rekommenderas en kombinering av subjektiva ochfysiologiska mätmetoder, detta innefattar en kombination av Functional near-infraredspecroscopy; en fysiologisk mätmetod som mäter hjärnaktiviteten med hjälp av ljuskällor ochdetektorer som fästs på frontalloben, Electrodermal activity; en fysiologisk mätmetod sommäter hjärnaktiviteten med hjälp av elektroder som fästs över skalpen och NASA task loadindex; en subjektiv, multidimensionell mätmetod som bygger på kortsortering och mäteruppfattad kognitiv belastning i en sammanhängande skala. Mätning med hjälp av dessametoder kan resultera i en ökad interaktionskvalitet i interaktiva, fysiska och digitalagränssnitt. En uppskattning av interaktionskvalitet kan bidra till att fel vid interaktionminimeras, vilket innebär en förbättring av användares upplevelse vid interaktion. / Technical developments have led to the broadcasting of massive amounts of information, athigh velocities. We must learn to handle this flow. To maximize the benefits of newtechnologies and avoid the problems that this immense information flow brings, interactionquality should be studied. We must adjust interfaces to the user because the user does nothave the ability to adapt and sort overly large amounts of information. We must developsystems that make the human more efficient when using interfaces.To adjust the interfaces to the user needs and limitations, knowledge about humancognitive processes is required. When cognitive workload is studied it is important that aflexible, easily accessed and non assertive technique is used to get unbiased results. At thesame time reliability is of great importance. To design interfaces with high interaction quality,a technique to evaluate these is required. The aim of this paper is to establish a method that iswell suited for measurement of interaction quality.When measuring interaction quality, a combination of subjective and physiologicalmethods is recommended. This comprises a combination of Functional near-infraredspectroscopy; a physiological measurement which measures brain activity using light sourcesand detectors placed on the frontal lobe, Electrodermal activity; a physiological measurementwhich measures brain activity using electrodes placed over the scalp and NASA task loadindex; a subjective, multidimensional measurement based on card sorting and measures theindividual perceived cognitive workload on a continuum scale. Measuring with these methodscan result in an increase in interaction quality in interactive, physical and digital interfaces.An estimation of interaction quality can contribute to eliminate interaction errors, thusimproving the user’s interaction experience. interaction cognitive workload interaction quality measure measurement interaktion kognitiv belastning interaktionskvalitet mätning mäta kvalitet quality EEG Electroencephalography elektroencefalografi SWAT Subjective workload assessment technique NASA TLX NASA task load index pupil dilation Modified Cooper Harper Scale MCH skalan Modified Cooper Harper Skalan MCH scale mätmetoder measures subjektiv objektiv subjective objective Skin conductivity response Heart rate variability Functional near- infrared spectroscopy SCR HRV fNIRS kommunikation communication kognition cognition teknikstödd kommunikation ansikte mot ansikte kommunikation face to face interaktivitet information interactivity workload arbetsbelastning cognitive kognitiv Diagnosticity sensitivity upplösning mätinstrument känslighet utvärdering analys utvärderingsprocedur metod method kalibrering calibration Engineering and Technology Teknik och teknologier

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