Wyniki wyszukiwania - BazTech

1

Influence of sterilization of a product manufactured using fdm technology on its dimensional accuracy

Kuczko Wiesław, Wichniarek Radosław, Górski Filip, Banaszewski Jacek

Advances in Science and Technology. Research Journal

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2018

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Vol. 12, no 1

74--79

EN

Inter-operational surgery supplies manufactured additively using the FDM (Fused Deposition Modelling) technology are required to be sterilized before use. After manufacturing, the part should be sterilized using one of commonly used processes, without losing its dimensions and shape. The paper presents studies on manufacturing and sterilizing samples made out of ABS material and influence of the sterilization process on the dimensional accuracy of these samples.

2

A Superconducting Cyclotron as a primary accelerator for exotic beam facilities

Maggiore M., Rifuggiato D., Calabretta L.

Nukleonika

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2003

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Vol. 48,suppl.2

165-167

EN

A four sector compact superconducting cyclotron for light ion beams with a maximum energy of 250 MeV/amu has been studied. This cyclotron is mainly designed to accelerate H2 + ions to be extracted by stripping. Ions like C, O or Ne can also be accelerated and extracted by stripping. Extraction by stripping allows to overcome many problems, especially if a certain beam intensity is requested. The preliminary design model of the magnet circuit has been accomplished with the 3D electromagnetic code OPERA [4]. The design of the main coils and of the cryostat has been investigated, too. The features of beam dynamics of this cyclotron, including extraction trajectories, will be presented. Several fields of application have been envisaged for this cyclotron, namely nuclear physics, therapy treatment, interdisciplinary research and radioisotope production using low or medium intensity beams.

3

Textile slow-release systems with medical applications

ten Breteler M. R., Nierstrasz V. A., Warmoeskerken M. M. C. G.

Autex Research Journal

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2002

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Vol. 2, no. 4

175--189

EN

In the development of medical drug delivery systems, attention has been increasingly focused on slow- or controlled delivery systems in order to achieve an optimal therapeutic effect. Since the administration of drugs often requires a defined or minimum effective dosage in the human body, more conventional delivery systems such as tablets require relatively high doses, which can result in undesired toxic effects. Subsequent degradation of the drug in the human body will result in a drug concentration below the minimum effective level. Furthermore, there are situations where oral administration is less advisable, such as in cases of prolonged treatment or with people that are forgetful, which again results in ineffective treatment. Textile slow-release systems have the potential to overcome these negative aspects. Drugs containing transdermal patches for ex-vivo applications are already familiar; however, this paper will not deal with such applications, but with more advanced in-vivo textile slow-release systems. Due to enormous progress over the years in the fields of supramolecular chemistry, nanotechnology, and polymer science & technology, a number of promising drug delivery technologies have been developed. This review will focus on the opportunities of textiles bearing cyclodextrins, aza-crown ethers or fullerenes, as well as ion-exchange fibres, drug-loaded hollow fibres, textiles treated with nanoparticles and fibres with bioactive compounds in their embodiment. In this paper, the delivery systems will be discussed and compared in terms of biostability, biodegradability, controllability, toxicity, carcinogenicity, interface reactions, material costs and the fabrication process.

4

Medical digital image representation using a standard part partitioning

Czapla Z.

Journal of Medical Informatics & Technologies

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2000

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Vol. 1

IT 113--121

EN

In this paper topics of a method of digital image representation using standard part partitioning has been presented. The paper contains the general method description and as well the detailed solution using square quad part partitioning. The general method description includes: main characteristics of considered images, determinations of standard part set, a rule of function selection and bases of image partitioning. As a method functions were chosen affinic transformations which consists of rotations, scalings and translations. The detailed solution of presented method is an image partitioning using square quad standard part set. The description of this solution contains: definitions of standard part set, results of selecting affinic function coefficients and as well a few samples of image partitioning. The results of partitioning are kept in a memory as affinic transformation coefficients and constitute the representation of digital image. In the return process pixel values of decoded area are derived from coefficients of image representation. The presented method may be use in a medical digital image encoding.

PL

W opracowaniu przedstawiono zagadnienia reprezentacji obrazów cyfrowych wykorzystujących fragmentację wzorcem. Praca zawiera ogólny opis metody oraz szczegółowe rozwiązanie dla wzorców kwadratowych poczwórnych. Przeprowadzenie fragmentacji obrazu pozwala na uzyskanie jego reprezentacji w postaci zbioru współczynników przekształceń. W trakcie odtwarzania obrazu wartości pikseli poszczególnych obszarów odtwarzane są na podstawie dekodowanych współczynników. Prezentowana metoda może mieć zastosowanie do kodowania cyfrowych obrazów medycznych.