898 research outputs found
Introduction to (Re)Using Questionnaires in Human-Robot Interaction Research
No full textIn the domain of Human-Robot Interaction (HRI), questionnaires are often used to measure phenomena. In this chapter, we focus on the use of validated scales. Scales consist of a series of questions that combined are used to measure a particular phenomenon or concept. The goal of this chapter is to guide researchers originating from different backgrounds through the process of choosing and (re)using such an instrument. In addition, we explain how researchers can verify that the scale is measuring what they intend to measure (is "valid''). We also give practical advice throughout the process based on our own experience with using scales in our own research. We recommend a standardized process for using scales in HRI research. Existing scales should be validated in a study very similar to the study that is being designed before being trusted to perform correctly. Scales that do not quite fit a study should be modified, but must then be re-validated. Even though some scales are prevalent and often used in HRI studies with a different context, researchers should still know their limitations and have a healthy suspicion that they are working as expected. We expand upon recommendations like these as we describe our recommended process for (re)using questionnaires. This chapter gives an introductory overview of this process in plain language and then points towards the more formal and complete texts for any details that are needed
Babel, or the local distortion of the Greek language
No full textTitle: Βαβυλωνία ἤ ἡ κατά τόπους διαφθορά τῆς ἑλληνικῆς γλώσσας. Κωµωδία (Babel, or the local distortion of the Greek language: A comedy) Originally published: Ναύπλιο (Nafplio), Τυπογραφεῖsο Κωνσταντίνου Τόµπρα ἐκ Κυδωνιῶν καὶ Κωνσταντίνου Ἰωαννίδη ἐκ Σµύρνης, 1836 Language: Greek The excerpt used is from D. C. Vyzantios, Βαβυλωνία, introduction by Spyros Evangelatos (Athens: Εστία, 1993), pp.1–3. About the author Dimitrios Vyzantios (pseudonym of Dimitrios K. Hatziaslanis) [1790, Constantin..
Dimitrios Tsamis Karatasos : a symbol of Greek, Serbian and Bulgarian friendship
Full text linkTwo Serbian texts extol the contribution of Dimitrios Tsamis Karatasos to the Balkan joint effort to throw off the Ottoman yoke. These texts are analysed by the author within the historical framework of their period, so that the man’s personality and work may be accurately evaluated from a fresh viewpoint. More specifically, the author conducts a research on the tombstone of Dimitrios Tsamis Karatasos, which he discovered himself at Naoussa, and the octet engraved on it, which is also published here. The work is illustrated by seven plates, of which four have not been published previously
3D Volumetric and Semantic Reconstruction of a Robotic Workspace Using Deep Learning: A Proposal for a Symbiotic Human Robot Collaboration System
No full textHuman-Robot Interaction (HRI) has evolved at a rapid rate in the last decade. This thesis tackles the aspect of contextualising the environment surrounding the robot in the form of semantics. A scene reconstruction system is proposed, composed of an offline stage (static objects) and an online one (dynamic objects). The system works as proof of concept. Its current application is to search for small objects of interest during the online stage, utilising larger objects found during the offline stage as landmarks. The semantics of the environment are computed by utilising a two-stage object segmentation pipeline, using YOLOv4 as an object detector and DeepLabV3+ for object segmentation. Object ontologies are used to create relations between static and dynamic objects. After offline and online reconstructions have been performed, the system projects the object masks to 3D coordinates. Many qualitative and quantitative results have been reported and demonstrate the robustness of the proposed system. The proof of concept is deemed successful since the system can utilise static objects as regions of interest to detect dynamic objects based on their ontological relations and infer where specific tasks will occur
The Remains of authoritarianism : bureaucracy and civil society in post-authoritarian Greece
No full textDimitrios A. Sotiropoulos. 30 cm. He presented this paper at a seminar held at the Center on October 21, 1994. - T.p. Includes bibliographical references (p. 31-35
Generating appropriate object orientations for robot-to-human handovers using synthetic object affordances
No full textThis project is an investigation into applying object affordances to robot-to-human handovers. Our research makes two contributions. A state-of-the-art deep neural network for segmentation of object affordances named AffNet-DR, trained solely on synthetic data. Secondly, an object affordance enabled method for orienting objects appropriately for robot-to-human handovers. A user study with 6 participants showed that our method for computing handover orientations outperforms a method that uses random orientations. Finally, a robotic handover system was programmed in ROS Melodic and implemented on a KUKA LBR iiwa 7 R800 with an Intel RealSense D435i RGB-D sensor and a Robotiq 3-finger gripper. The system performs robot-to-human handovers with a success rate of 91.67 %.This project is an investigation into applying object affordances to robot-to-human handovers. Our research makes two contributions. A state-of-the-art deep neural network for segmentation of object affordances named AffNet-DR, trained solely on synthetic data. Secondly, an object affordance enabled method for orienting objects appropriately for robot-to-human handovers. A user study with 6 participants showed that our method for computing handover orientations outperforms a method that uses random orientations. Finally, a robotic handover system was programmed in ROS Melodic and implemented on a KUKA LBR iiwa 7 R800 with an Intel RealSense D435i RGB-D sensor and a Robotiq 3-finger gripper. The system performs robot-to-human handovers with a success rate of 91.67 %
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