Dynamics of combined electron beam and laser dispersion of polymers in vacuum

The mechanisms of the impact of the laser assisting effect on the dispersion kinetics and on the structure of the deposited layers in electron beam dispersion of a polymer target were analyzed. The proposed model and analytical expressions adequately describe the kinetic dependence of the polymer materials dispersion rate in a vacuum on the intensity of laser processing of their dispersion zone

ЗБІРНИК ТЕЗ ВСЕУКРАЇНСЬКОЇ НАУКОВО-ТЕХНІЧНОЇ КОНФЕРЕНЦІЇ «СТАЛИЙ РОЗВИТОК ГЛОБАЛЬНОЇ СИСТЕМИ ЗВ’ЯЗКУ, НАВІГАЦІЇ, СПОСТЕРЕЖЕННЯ ТА ОРГАНІЗАЦІЇ ПОВІТРЯНОГО РУХУ CNS/ATM─ 2023»

ЗБІРНИК ТЕЗ ВСЕУКРАЇНСЬКОЇ НАУКОВО-ТЕХНІЧНОЇ КОНФЕРЕНЦІЇ «СТАЛИЙ РОЗВИТОК ГЛОБАЛЬНОЇ СИСТЕМИ ЗВ’ЯЗКУ, НАВІГАЦІЇ, СПОСТЕРЕЖЕННЯ ТА ОРГАНІЗАЦІЇ ПОВІТРЯНОГО РУХУ CNS/ATM─ 2023

Кінетика росту конуса проміжної фази вздовж дислокаційних трубок всередині зерен полікристала

Dislocation-pipe diffusion (DPD) becomes a major contribution to device failure in microelectronic components at working temperatures. Usually, the simple random walk law for diffusion (Type C kinetics t1/2) is employed to calculate of DPD coefficients. The article presents an analytically solvable model of describing the diffusion phase cone growth along dislocation pipes inside polycrystal grains involving outflow from dislocation lines (Type B kinetics). Correlative analytical method to solve differential diffusion equations for such model is suggested. Competition between phase cone growth along dislocation lines involving outflow and phase wedge growth along grain boundaries (GBs) involving outflow is analyzed. It is shown that while phase wedge growth law along GBs is the Fisher regime t1/4, phase cone growth law along dislocation lines is another diffusion regime t1/6 . Real experimental data are analyzed using such diffusion regime. It is shown that it is possible to calculate DPD coefficients not only for the phase cone formation, but for migration of atoms along dislocations and self-diffusion along dislocation pipes too

JPie interface: an on-the-fly job submission and communication configuration package

This paper describes a new Java interface loosely modeled on the primitives of the pi-calculus to be used as a substratum for Grid based parallel computing. It allows the creation of processes and communications channels between processes. It also allows for the communications network between processes to be dynamically reconfigurable. The aim of the design is to achieve this with the minimum number of primitives and to integrate these primitives into the existing Java class framework

Pre-commercial 3D Digital TV studio

3D Digital TV studio’, which was published in this journal in February 2003 [1]. Recently, we had the honour to be awarded by the council of the IEE the A H Reeve Premium for that paper. Therefore, it fell natural to offer the journal this shor

MRI-compatible needle guidance toolkit to streamline arthrography procedures: Phantom accuracy study

© 2020 SPIE. In this paper we introduce a novel and enabling MRI-compatible needle guidance toolkit intended to streamline arthrography procedures, eliminating the need for ionizing radiation exposure during this diagnostic procedure. We developed a flexible 2D grid template with unique patterns in which each point on the grid can be uniquely represented and denoted with respect to surrounding patterns. This MRI-visible non-repeating grid template sits on top of the patient\u27s skin in the region of interest and allows the radiologist to visualize the skin surface in the MR images and correlates each point in MR image with the corresponding point on the grid. In this manner, the radiologist can intuitively find the entry point on the skin according to their plan. An MRI-compatible handheld positioning device consisting of a needle guide, two baseline bubble inclinometers, and an MRI-compatible stabilizer arm allows the radiologist to adjust the orientation of the needle in two directions. The radiologist selects an entry point on MR images, identifies a grid location through which the needle would be projected to pass on the image, and then reproduces this needle position and angulation using the MRI-compatible handheld device and the physical grid. To evaluate the accuracy of needle targeting with the MRI-compatible needle guidance toolkit, we used the kit to target 10 locations in a phantom in a Philips Achieva 1.5T MRI. The average targeting error was 2.2±0.7 mm. Average targeting procedure time was around 20 minutes for each target

Perifocal Soft Tissue Reactions in Response to Contaminated Implants With a Composite Antibacterial Coating: Experimental Study

Background. Protection against microbial colonization of surface fixators for metal osteosynthesis can reduce the number of infectious complications. The aim of the study was to experimentally assess early perifocal tissue reactions to metal implants with a composite antibacterial coating under microbial load. Methods. Fragments of steel pins for osteosynthesis (diameter 1 mm) with a four-component antibacterial coating based on polylactide, polyurethane, ciprofloxacin and silver nanoparticles were contaminated by methicillin-resistant S. aureus (MRSA) 43431. They were implanted in rats within the quadriceps femoris. Contaminated uncoated pins were used as a control. The animals were withdrawn from the experiment on the 2nd, 4th, 7th day after implantation. Histopathological specimens from tissue around implants were prepared. A semiquantitative assessment of reactions was performed. Results. The microbial load before implantation was (1.120.26)106 S. aureus cells for the control implants and (0.860.31)106 cells for implants with antibacterial coating. Tissue inflammatory reactions on the second day of implantation were equally evident in the control and investigated groups. There was a significant reduction in the number of immune cells and necrotic detritus, as well as increased growth of connective tissue and neoangiogenesis in the experimental group by the 4th day. The appearance of a less pronounced well-vascularized fibrous capsule around the experimental implants was noted by the 7th day. It indicates a more favorable healing of soft tissues in comparison with the control. Conclusion. Weak morphological manifestations of tissue reactions in response to the fitting of contaminated implants with an antibacterial coating can be associated with both the direct antimicrobial effect of the coating components and the anti-inflammatory activity of silver nanoparticles and ciprofloxacin included in its composition

Structure and electrical properties of polyaniline-based copper chloride or copper bromide coatings deposited via low-energy electron beam

Structure and electrical properties of polyaniline-based copper chloride or copper bromide coatings deposited via low-energy electron bea