First steps in the development of next-generation chirped volume Bragg gratings by means of fs laser inscription in fused silica.

The first steps towards the development and characterization of next-generation chirped volume Bragg gratings (CVBGs) by means of fs laser inscription were made. Based on the phase mask inscription technique we realized CVBGs in fused silica with a 3 × 3 mm aperture and a length of almost 12 mm with a chirp rate of ∼190 ps/nm around a central wavelength of 1030.5 nm.

Being present in a real or virtual world: A EEG study.

Background And Objective: This study proposes an approach to evaluation and measuring of presence for man-machine interaction in the virtual reality based on electroencephalographic data.

Materials And Methods: It analyzes stable electroencephalographic patterns that allow us to trace a connection between a brain activity and purposeful actions of an individual in various environments. The subjects of the study were experienced downhill skiers equipped with electroencephalographs, who performed real-life skiing on a downhill course, after which they were offered a virtual simulation of downhill skiing using an HTCVive headset and a programmed 2D or desktop simulator.

[Intraoperative hypoxic preconditioning as a method of neuroprotection in operations on internal carotid arteries].

The present work was aimed at assessing safety and efficacy of hypoxic preconditioning of the brain as a method of protecting the central nervous system during operations on the internal carotid artery in patients presenting with atherosclerotic lesions of the carotid arteries. The study included a total of 72 patients who underwent carotid endarterectomy for haemodynamically significant atherosclerosis of carotid arteries. Based on the obtained findings, a conclusion was made on a possibility of using intraoperative hypoxic preconditioning for prevention of ischaemic complications from the development in the perioperative period.

[Surgical treatment of primary malignant tumors of the trachea].

The authors have performed 18 circular resections of the trachea (CRT) for adenocystic cancer and typical carcinoid. In 10 of these patients more than 5 cm of the tracheal segment were ablated. Postoperative radiotherapy was made on 8 patients with adenocystic cancer with lengthy CRT.

[About the terminology of the battle mechanical damages].

The terminology of the battle mechanical damages has a direct connection with determination of frequency and structure of such damages and value of sanitary loss. The entitled figures are necessary for troop basis during the medical treatment. The present article is written because of appearance in large academic and research works of military-medical directionality inadequate and incorrect data of frequency of damages by the similar wounds.