Browsing by Author "Turgut, Ali Emre"

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Citation - WoS: 1
Citation - Scopus: 1
Anticipatory Effect of Execution on Observation: an Approach Using Exopinch Finger Robot
(Tubitak Scientific & Technological Research Council Turkey, 2019) Arıkan, Kutluk Bilge; Zadeh, Hassan Gol Mohammad; Turgut, Ali Emre; Zinnuroğlu, Murat; Bayer, Gözde; Günendi, Zafer; Cengiz, Bülent
Background/aim: This study aims to explore the mirror neuron system (MNS) involvement using mu (8–12 Hz)/beta (15–25 Hz) bandsuppression in an action observation-execution paradigm.Materials and methods: Electrophysiological (EEG) data from 16 electrodes were recorded while 8 participants observed video clips ofa hand squeezing a spring. Specifically, the effect of anticipated execution on observation was studied. For this purpose, a fully actuatedfinger exoskeleton robot was utilized to synchronize observation and execution and to control the execution condition for the participants. Anticipatory effect was created with a randomized robot accompany session.Results: The results showed that the observational condition (with or without anticipation) interacted with hemisphere at central channels near somatosensory cortex. Additionally, we explored the response of MNS on the kinetics features of visual stimuli (hard or softspring).Conclusion: The results showed an interaction effect of kinetics features and hemisphere at frontal channels corresponding nearly tothe ventral premotor cortex area of the brain. The activation of mirror neurons in this area plays a crucial role in observational learning.Based on our results, we propose that specific type of visual stimuli can be combined with the functional abilities of the MNS in the action observation based treatment of hand motor dysfunction of stroke patients to have a positive additional impact.
Ayna Nöronların İrdelenmesi ve Robotik Ayna Terapisi Sisteminin Geliştirilmesi
(2017) Arıkan, Kutluk Bilge; Cengiz, Bülent; Zinnuroğlu, Murat; Turgut, Ali Emre
Günlük yasam aktivitelerinde elin ve ince kavrama hareketinin önemi büyüktür. Inme sonrası fonksiyon geri kazanımı en zor olan uzuv eldir. El rehabilitasyon robotları üzerine yogun çalısmalar sürmektedir. Proje kapsamında hazırlanan videoları islev kaybı veya güçsüzlügü olan ele takip ettiren özgün bir robotik sistem gelistirilmistir. Robotik sistemin tasarımında ince kavrama hareketine odaklanılmıstır. Bu amaca uygun olarak harici iskelet formunda mekanizma tasarlanmıstır. Ayna nöronların motor ögrenmedeki rolleri EEG ve TMS kayıtları ve detaylı analizler esliginde incelenmistir. Robotik sistemde kuvvet ve pozisyon denetimi gerçeklestirilmistir.
Citation - WoS: 51
Citation - Scopus: 63
Cue-based aggregation with a mobile robot swarm: a novel fuzzy-based method
(Sage Publications Ltd, 2014) Arvin, Farshad; Turgut, Ali Emre; Bazyari, Farhad; Arikan, Kutluk Bilge; Bellotto, Nicola; Yue, Shigang
Aggregation in swarm robotics is referred to as the gathering of spatially distributed robots into a single aggregate. Aggregation can be classified as cue-based or self-organized. In cue-based aggregation, there is a cue in the environment that points to the aggregation area, whereas in self-organized aggregation no cue is present. In this paper, we proposed a novel fuzzy-based method for cue-based aggregation based on the state-of-the-art BEECLUST algorithm. In particular, we proposed three different methods: naive, that uses a deterministic decision-making mechanism; vector-averaging, using a vectorial summation of all perceived inputs; and fuzzy, that uses a fuzzy logic controller. We used different experiment settings: one-source and two-source environments with static and dynamic conditions to compare all the methods. We observed that the fuzzy method outperformed all the other methods and it is the most robust method against noise.