Abdülhak Hamid Tarhan

Taha Toros Arşivi, Dosya No: 56-Abdülhak Hamit Tarhanİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033

Yahya Kemal ve İstanbul

Taha Toros Arşivi, Dosya No: 182-Yahya Kemal Beyatlıİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033

Reach and grasp by people with tetraplegia using a neurally controlled robotic arm

Paralysis following spinal cord injury (SCI), brainstem stroke, amyotrophic lateral sclerosis (ALS) and other disorders can disconnect the brain from the body, eliminating the ability to carry out volitional movements. A neural interface system (NIS)1–5 could restore mobility and independence for people with paralysis by translating neuronal activity directly into control signals for assistive devices. We have previously shown that people with longstanding tetraplegia can use an NIS to move and click a computer cursor and to control physical devices6–8. Able-bodied monkeys have used an NIS to control a robotic arm9, but it is unknown whether people with profound upper extremity paralysis or limb loss could use cortical neuronal ensemble signals to direct useful arm actions. Here, we demonstrate the ability of two people with long-standing tetraplegia to use NIS-based control of a robotic arm to perform three-dimensional reach and grasp movements. Participants controlled the arm over a broad space without explicit training, using signals decoded from a small, local population of motor cortex (MI) neurons recorded from a 96-channel microelectrode array. One of the study participants, implanted with the sensor five years earlier, also used a robotic arm to drink coffee from a bottle. While robotic reach and grasp actions were not as fast or accurate as those of an able-bodied person, our results demonstrate the feasibility for people with tetraplegia, years after CNS injury, to recreate useful multidimensional control of complex devices directly from a small sample of neural signals

Implantable Neural Probes for Brain-Machine Interfaces - Current Developments and Future Prospects

A Brain-Machine interface (BMI) allows for direct communication between the brain and machines. Neural probes for recording neural signals are among the essential components of a BMI system. In this report, we review research regarding implantable neural probes and their applications to BMIs. We first discuss conventional neural probes such as the tetrode, Utah array, Michigan probe, and electroencephalography (ECoG), following which we cover advancements in next-generation neural probes. These next-generation probes are associated with improvements in electrical properties, mechanical durability, biocompatibility, and offer a high degree of freedom in practical settings. Specifically, we focus on three key topics: (1) novel implantable neural probes that decrease the level of invasiveness without sacrificing performance, (2) multi-modal neural probes that measure both electrical and optical signals, (3) and neural probes developed using advanced materials. Because safety and precision are critical for practical applications of BMI systems, future studies should aim to enhance these properties when developing next-generation neural probes

Akif ve Terakki'nin sırrı

Taha Toros Arşivi, Dosya No: 134-Mehmet Akif Ersoy. Not: Ekteki belge Türk Edebiyatı dergisinin Mehmed Akif Ersoy anıt sayısıdır

In search of a representation of the Gavrinis megalithic tomb (Morbihan, France)

[EN] Gavrinis, on the estuary of the river Vannes (Brittany, France), is known for the extraordinary abundance of engravings preserved on the monolithic wall pillars and capstone. Our objective is to re-qualify these representations using a new frame of reference, based on a new corpus of engraved signs, including their architectural context and position in the volume of the rock. Recording of the topographical, archaeological, petrographic and acoustic data of the cairn and the passage grave provides a representation of both architecture and engraved and painted signs[ES] Gavrinis, en el estuario del río de Vannes (Bretaña, Francia), es conocido por la abundancia extraordinaria de grabados conservados en los pilares monolíticos de la pared. Nuestro objetivo es calificar de nuevo a estas representaciones usando un nuevo marco de referencia, basado en una nueva recopilación de signos grabados por escáner y fotografías, incluso su contexto arquitectónico y posición en el volumen de la roca. Un registro de los datos topográficos, arqueológicos, petrographicos y acústicos del tumulo y de la tumba permiten una representación tanto de la arquitectura como de los signos grabados y pintados.This program and work in progress is financed by the Ministry of Culture and communication, the National centre for scientific research (CNRS) and the Morbihan departmentCassen, S.; Lescop, L.; Grimaud, V.; Querré, G.; Suner, B. (2015). In search of a representation of the Gavrinis megalithic tomb (Morbihan, France). Virtual Archaeology Review. 4(8):61-63. https://doi.org/10.4995/var.2013.4319OJS616348CASSEN Serge, LESCOP Laurent, GRIMAUD Valentin, QUERRE Guirec, SUNER Bruno (2012): "Une approche multiscalaire du monument néolithique de Gavrinis (Larmor-Baden, Morbihan). Campagne d'acquisition 2011". In: Journée du « CReAAH » Archéologie, Archéosciences, Histoire. Rennes: Univ. Rennes 1, pp. 13-14.CLOSMADEUC, Gustave (1886): "Gavrinis. Dernières fouilles sous le dallage de la chamber". Bull. Soc. Polym. Morbihan, 2, pp. 63-69.LE ROUX, Charles.-Tanguy (1984): "À Propos des fouilles de Gavrinis (Morbihan). Nouvelles données sur l'art mégalithique Armoricain". Bull. Société Préhistorique Française, 1, 8, pp. 240-245.SHEE-TWOHIG, Elisabeth (1981): The Megalithic Art of western Europe. Oxford: Clarendon Press, 560 p