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Conference on Mensch und Computer (MuC) - Building Bridges

作者： Willms, Jan Letter, Maximilian Marchandise, Emile Wolf, Katrin Berlin Univ Appl Sci & Technol BHT Berlin Germany

ISBN: (纸本)9798400707711

The use of mid-air gestures to control interactive systems is becoming increasingly important, particularly in mixed reality scenarios. However, these gestures are not always intuitive and can be challenging to learn as they lack visual guidance. Therefore, it is crucial to explore strategies to improve the learnability of these gestures. In this work, it is investigated how a vibration stimulus can be applied at the forearm to guide a person in performing a gesture. Utilizing a prototypical wristband with 24 vibrotactile actuators, the metaphors pull and push, representing attractive and repulsive feedback, were compared against each other. Results of a controlled user study show that participants perform significantly better with the pull metaphor, completing gestures faster, and make fewer errors. In line with this, the majority stated a subjective preference towards pull after experiencing both metaphors.

关键词： Mid-Air Gestures guidance Wristband Haptic Feedback Vibrotactile Attractive and Repulsive Feedback

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Analyzing the Effects of Visual Based Tracking Algorithms on Classical guidance Methods 10

Analyzing the Effects of Visual Based Tracking Algorithms on...

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10th International Conference on Recent Advances in Air and Space Technologies (RAST)

作者： Kurt, Yagiz Aydinli, Sevket Utku Soken, Halil Ersin ASELSAN Inc ASELSAN Res Ctr Ankara Turkiye Middle East Tech Univ Dept Aerosp Engn Ankara Turkiye

ISBN: (纸本)9798350323023

This paper examines the effects of target position and velocity estimation accuracy obtained by visual-based tracking algorithms on the performance of classical guidance laws. Present deep learning-based visual MOT (Multiple Object Tracking) algorithms use a linear Kalman Filter to estimate the motion of moving objects. Thus, these methods require high-frame rate videos to accurately track the objects and apply the prediction-update steps sequentially since they do not rely on prediction results if the measurement is unavailable. As a result, employing the linear Kalman Filter give rise to the objects being untracked or lost due to occlusion in a short time window. For this reason, we utilized Unequal Dimension Multiple Model (UDIMM) based motion estimation filter in deep learning-based visual MOT to increase the estimation accuracy of a moving target. By doing that, we keep providing highly accurate state estimations to our quadcopter while the target is occluded and maneuvering. The study presents the performance of guidance methods such as True Proportional Navigation (TPN), Pure Proportional Navigation (PPN), and Effective Pure Proportional Navigation (EPPN) as a result of Monte Carlo (MC) simulations when employing both linear and UDIMM filters.

关键词： guidance IMM Filter deep learning based visual target tracking

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Methodological guidance for incorporating equity when informing rapid-policy and guideline development

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JOURNAL OF CLINICAL EPIDEMIOLOGY 2022年第0期150卷 142-153页

作者： Dewidar, Omar Kawala, Brenda Allen Antequera, Alba Tricco, Andrea C. Tovey, David Straus, Sharon Glover, Rebecca Tufte, Janice Magwood, Olivia Smith, Maureen Ooi, Cheow Peng Dion, Anna Goetghebeur, Mireille Reveiz, Ludovic Negrini, Stefano Tugwell, Peter Petkovic, Jennifer Welch, Vivian Univ Ottawa Bruyere Res Inst 85 Primrose Ave Ottawa ON K1R 6M1 Canada Univ Gothenburg Sahlgrenska Acad Inst Med Master Global Hlth Dept Publ HlthSect Epidemiol & Social Med Box 414 SE-405 Gothenburg Sweden Hosp Santa Creu & Sant Pau Biomed Res Inst St Pau Barcelona 08025 Spain Unity Hlth Toronto St Michaels Hosp Li Ka Shing Knowledge Inst 209 Victoria St Toronto ON M5B 1T8 Canada Univ Toronto Epidemiol Div Dalla Lana Sch Publ Hlth 27 Kings Coll Circle Toronto ON M5S 1A1 Canada Univ Toronto Inst Hlth Management & Policy Evaluat 27 Kings Coll Circle Toronto ON M5S 1A1 Canada Queens Univ Joanna Briggs Inst Ctr Excellence Queens Collaborat Hlth Care Qual 92 Barrie StRoom 214 Kingston ON K7L 3N6 Canada Cochrane France Paris France London Sch Hyg & Trop Med Fac Publ Hlth Policy Dept Hlth Serv Res & Policy London WC1E 7HT England Hassanah Consulting Seattle WA 98122 USA Univ Ottawa Fac Hlth Sci Interdisciplinary Sch Hlth Sci Thompson Hall25 Univ Private Ottawa ON K1N 7K4 Canada Univ Putra Malaysia Endocrine Unit Dept Med Fac Med & Hlth Sci Serdang 43400 Selangor Malaysia Ottawa Hosp Res Inst Ctr Implementat Res 501 Smyth Rd Ottawa ON K1H 8L6 Canada Natl Inst Excellence Hlth & Social Serv Unit Methods Eth & Participat Montreal PQ Canada Pan Amer Hlth Org Incident Management Syst Covid 19 Response Evidence & Intelligence Act Hlth Dept 525 23rd St Washington DC 20037 USA Univ Statale Dept Biomed Surg & Dent Sci Milan Italy IRCCS Ist Ortoped Galeazzi Milan Italy Univ Ottawa Dept Med Ottawa ON Canada Univ Ottawa Sch Epidemiol & Publ Hlth Ottawa ON Canada Ottawa Hosp Res Inst Clin Epidemiol Program Ottawa ON Canada Bruyere Res Inst WHO Collaborating Ctr Knowledge Translat & Hlth T Ottawa ON Canada Univ Ottawa Sch Epidemiol & Publ Hlth 600 Peter Morand Crescent Ottawa ON K1G 5Z3 Canada

Objectives: We provide guidance for considering equity in rapid reviews through examples of published COVID-19 rapid reviews. Study Design and Setting: This guidance was developed based on a series of methodological meetings, review of internationally renowned guidance such as the Cochrane Handbook and the Preferred Reporting Items for Systematic Reviews and Meta-Analysis for equity-focused systematic reviews (PRISMA-Equity) guideline. We identified Exemplar rapid reviews by searching COVID-19 databases and requesting examples from our team. Results: We proposed the following key steps: 1. involve relevant stakeholders with lived experience in the conduct and design of the review;2. reflect on equity, inclusion and privilege in team values and composition;3. develop research question to assess health inequities;4. conduct searches in relevant disciplinary databases;5. collect data and critically appraise recruitment, retention and attrition for populations experiencing inequities;6. analyse evidence on equity;7. evaluate the applicability of findings to populations experiencing inequities;and 8. adhere to reporting guidelines for communicating review findings. We illustrated these methods through rapid review examples. Conclusion: Implementing this guidance could contribute to improving equity considerations in rapid reviews produced in public health emergencies, and help policymakers better understand the distributional impact of diseases on the population. (C) 2022 Elsevier Inc. All rights reserved.

关键词： Equity Rapid reviews Stakeholder engagement guidance Guideline development Policy

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Analyzing Spatio-Temporal Correlations with User-Oriented guidance - An Interactive Visualization Approach for Demand-Oriented Limited Service Offers 27

Analyzing Spatio-Temporal Correlations with User-Oriented Gu...

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27th International Conference on Information Visualisation (IV) / 19th International Conference Computer Graphics, Imaging and Visualization (CGiV)

作者： Rolwes, Alexander Stockemer, Julian Boehm, Klaus Mainz Univ Appl Sci Inst Spatial Informat & Surveying Technol i3mainz Mainz Germany

ISBN: (纸本)9798350341614

GeoVisual Analytics often uses a wide range of visualization techniques in combination with human interactions. However, in order to improve urban planning decisions and expand the knowledge base about spatio-temporal correlations in cities, we identify high and sometimes difficult-to-overcome data and visualization complexity. Therefore, users need targeted support to reduce this complexity and understand complex multidimensional data. This paper proposes an interactive 3D visualization approach for analyzing spatiotemporal correlations. Effective visual explanations in user-oriented guidance with storytelling elements support this technique. We adapt the approach of flow maps to visualize both resulting correlations and the underlying density of possible destinations from an existing geoanalytical process. Our interactive step-by-step guidance with four narratives aims to create a balance between the author and the user. We evaluated our prototype with various domain experts. The evaluation confirms our approach and improves users' understanding of data and spatio-temporal correlations in urban areas.

关键词： GeoVisual Analytics guidance Storytelling Spatio-Temporal Visualization Human-Computer Interaction Urban Planning

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Comparison of Deterministic and Stochastic Global Optimization Methods for Real-Time Generation of guidance Trajectories

Comparison of Deterministic and Stochastic Global Optimizati...

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Asia-Pacific International Symposium on Aerospace Technology (APISAT)

作者： Fujikawa, Takahiro Yonemoto, Koichi Tokyo Univ Sci Noda 2641 Japan

ISBN: (纸本)9789811926358;9789811926341

guidance algorithms for the return flight of suborbital spaceplanes must generate a variety of guidance trajectories that satisfy terminal conditions even in unexpected abort operations. To tackle this issue, a trajectory optimization method that combines convex quadratic programming and a global derivative-free optimization technique in a nested structure has been recently studied by the authors. This hybrid method efficiently explores the three-dimensional Bezier trajectories and associated guidance commands that exactly fulfill the equality terminal conditions and command continuity. In this paper, Monte-Carlo simulations are performed to investigate the applicability of this guidance method to the realistic scenario of unpowered return flight. Six stochastic evolutionary algorithms, a Bayesian optimization method, and three deterministic search algorithms are implemented and tested as global optimizers. They are compared in terms of computational and implementational complexities, robustness, and diversity of solutions obtained. The results show that reliable and real-time trajectory generation is possible, when an optimizer and its settings are properly chosen. It also reveals that diverse trajectories between initial and terminal conditions are successfully generated.

关键词： guidance Trajectory optimization Global optimization Real-time optimization Suborbital spaceplane

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TouchPilot: Designing a guidance System that Assists Blind People in Learning Complex 3D Structures 23

TouchPilot: Designing a Guidance System that Assists Blind P...

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25th International ACM SIGACCESS Conference on Computers and Accessibility (ASSETS)

作者： Wang, Xiyue Kayukawa, Seita Takagi, Hironobu Asakawa, Chieko Miraikan Natl Museum Emerging Sci & Innovat Tokyo Japan IBM Res Tokyo Japan

ISBN: (纸本)9798400702204

Making complex structures accessible to blind people is challenging due to the need for skilled explainers. Interactive 3D printed models (I3Ms) have been developed to enable independent learning of 3D models through activating audio labels. However, they present single-layered information and require users to identify interactive elements through a pinpointing action, which might be insufficient for learning complex and unfamiliar subjects. In this paper, we investigate I3Ms for complex structures. We propose TouchPilot, a guidance system designed based on a study that observed learner-explainer interaction styles. TouchPilot guides users step by step through navigation, exploration of hierarchical elements, and confirmation of their entire areas. A follow-up study found that the guidance system led to better learning outcomes and higher independence compared to a pinpointing system. Feedback suggests that being primed by the guidance system systematically, followed by pinpointing freely for review, is preferred for learning complex structures.

关键词： interactive 3D printed models visual impairments guidance computer vision

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Navigation, guidance and Control of a catamaran robust to external disturbances

Navigation, Guidance and Control of a catamaran robust to ex...

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OCEANS Conference

作者： Obradovic, Juraj Loncar, Ivan Batos, Matko Miskovic, Nikola Univ Zagreb Lab Underwater Syst & Technol LABUST Fac Elect Engn & Comp Zagreb Croatia

ISBN: (纸本)9798350332261

This paper includes the implementation of navigation, guidance, and control algorithms for the catamaran-shaped autonomous surface vehicle (ASV) with a thruster configuration that includes 4 smaller thrusters in x-configuration and one larger thruster for the surge motion. The algorithms are described with emphasis on the allocator algorithms for which customizations were made to improve maneuverability. An experiment was conducted to show better energy optimization after a bigger thruster was included for surge motion. Two different experiments were made in s Marine Robotics Unity Simulator (MARUS) to show maneuverability improvement and test the full path following setup.

关键词： ASV navigation guidance control allocator

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guidance Simulation and Experimental Verification of Trajectory Correction Mortar Projectile

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IEEE ACCESS 2021年 9卷 15609-15622页

作者： Sun, Xitong Gao, Min Zhou, Xiaodong Lv, Jing Tian, Feng Qiao, Zhiming Army Engn Univ Shijiazhuang Campus Shijiazhuang Hebei Peoples R China Beijing Inst Aerosp Automat Control Beijing 100854 Peoples R China

Integrated methods are used in the modification of trajectory, including improved perturbation impact point deviation prediction, adaptive proportional guidance and adaptive proportional differential guidance, thus improving the firing accuracy of guided mortar shell. The six degrees of freedom of both the trajectory model and the control model were established, and their guidance laws were designed based on the three guidance schemes. Firstly, the perturbation impact point deviation prediction method is improved by setting up a discrimination factor in the rising phase of trajectory based on the principle of traditional perturbation impact point deviation prediction method and in combination with the trajectory characteristics of guided mortar, which further improves the correction efficiency. The adaptive proportional guidance law is designed in the longitudinal plane, while the adaptive proportional differential guidance law is designed in the transverse plane due to the fact that the constant proportional coefficient in the proportional guidance law does not conform to the requirements of actual trajectory. In this paper, Monte Carlo simulation method and ammunition flight test are used to verify the designed guidance law, and the simulation results illustrate that the integrated guidance method is both reasonable and effective. As for the error of the guidance tool and actuator, the method is available for the reduction of impact point deviation and the improvement of accuracy. The circular error probability (CEP) not under control decreases from 126.317m to 10.1284m when control is applied. Besides, the feasibility of the designed guidance law is verified by the flight tests of guided mortar projectile in large, medium and small range respectively from the perspective of engineering application. It can be seen from the test trajectory impact point data that the guidance law is available for the effective correction of trajectory deviation in the actual hardwar

关键词： Projectiles Trajectory Navigation Mortar Perturbation methods Adaptive systems Missiles guidance impact point deviation proportional guidance perturbation guidance proportional differential

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UPDATE OF THE AHRQ guidance ON USING NON-RANDOMIZED STUDIES IN EVIDENCE SYNTHESES: Update of the agency for healthcare research and quality guidance on using nonrandomized studies in evidence syntheses

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JOURNAL OF CLINICAL EPIDEMIOLOGY 2022年 152卷 307-308页

作者： Cuello-Garcia, Carlos A. Schunemann, Holger J. McMaster Univ Michael G DeGroote Cochrane Canada Ctr World Hlth Org Collaborating Ctr Infect Dis Res M 1280 Main St West Hamilton ON L8S 4L8 Canada McMaster Univ McMaster GRADE Ctr World Hlth Org Collaborating Ctr Infect Dis Res M 1280 Main St West Hamilton ON L8S 4L8 Canada McMaster Univ Dept Hlth Res Methods Evidence & Impact 1280 Main St West Hamilton ON L8S 4L8 Canada McMaster Univ Dept Med 1280 Main St West Hamilton ON L8S 4L8 Canada

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关键词： Nonrandomized studies Systematic reviews Study eligibility guidance

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Fuel-Optimal Powered Descent guidance for Hazardous Terrain 22

Fuel-Optimal Powered Descent Guidance for Hazardous Terrain

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22nd World Congress of the International Federation of Automatic Control (IFAC)

作者： Basar, Sheikh Zeeshan Ghosh, Satadal Indian Inst Technol Dept Aerosp Engn Room 222CTC Bldg Madras Tamil Nadu India

ISBN: (纸本)9781713872344

Future interplanetary missions will carry more and more sensitive equipment critical for setting up bases for crewed missions. The ability to manoeuvre around hazardous terrain thus becomes a critical mission aspect. However, large diverts and manoeuvres consume a significant amount of fuel, leading to less fuel remaining for emergencies or return missions. Thus, requiring more fuel to be carried onboard. This work presents fuel-optimal guidance to avoid hazardous terrain and safely land at the desired location. We approximate the hazardous terrain as step-shaped polygons and define barriers around the terrain. Using an augmented cost functional, fuel-optimal guidance command, which avoids the terrain, is derived. The results are validated using computer simulations and tested against many initial conditions to prove their effectiveness.

关键词： Aerospace Space exploration and transportation guidance navigation and control of vehicles Autonomous systems

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