Nauka – Technika – Technologia : seria wydawnicza AGH. Tom 10
Loading...
Files
Relation
Local access
Date
Date (copyright)
Editor
Authors
Other contributors
Access rights
Access: otwarty dostęp
Rights: AGH Licence (University Press)
Licencja AGH (University Press) - Fair use of copyrighted works
Other title
Resource type
Call number
Edition/work details
Publisher: Wydawnictwa AGH
Place of publication: Kraków
ISBN: 978-83-68219-20-3
Series: Nauka – Technika – Technologia : seria wydawnicza AGH, 10
ISSN: 3071-7027
Description
Keywords
Chapters
Mikro- i nanomateriały w technologii płuczek wiertniczych na bazie olejowej, stosowanych do wiercenia otworów w warunkach wysokiego ciśnienia i wysokiej temperatury (HPHT)
(Wydawnictwa AGH, 2024) Jamrozik, Aleksandra; Szczygieł, Andrzej
Oil-based drilling fluids are primarily used in challenging geological and reservoir conditions, such as high temperatures, high pressures, reactive rock formations, or the influx of mineralized formation water. This publication presents the results of laboratory tests on the rheological properties and stability of oil-based drilling fluid, with micronized barite as the weightening material. To enhance the stability of these drilling fluids, an organophilic nanomaterial – amino-attapulgite, was used. The research demonstrated that the combination of micronized barite and amino-attapulgite in oil-based fluids allows for the modification of their properties across a wide range of densities and low rheological values. The results showed that incorporating organophilic attapulgite and using micronized barite as the weightening agent reduces sedimentation conditions and improving stability drilling fluids.
Kształtowanie właściwości powierzchniowych materiałów polimerowych stosowanych w implantologii
(Wydawnictwa AGH, 2024) Kluska, Stanisława; Skoczek, Jadwiga
Effective and frequently used surface modification methods for polymeric materials are plasma treatment methods. They allow the selective modification of surface properties such as, for example, biocompatibility, surface roughness, surface free energy or degree of wettability, while other material characteristics remain unchanged. Changes in surface characteristics, due to the use of plasma generated, for example, by an external field at 13.56 MHz (Radio Frequency Chemical Vapour Deposition technique), can result from the formation of new chemical structures in the surface layer of the material. In this study, plasmochemical modification of biomedical polymers, a semi-crystalline, thermoplastic polymer known as polyetheretherketone PEEK and polyurethane PU were carried out to improve the surface properties of these materials. The surfaces of the polymers were modified by ion etching in low - temperature plasma in an Ar, N$_{2}$, O$_{2}$ atmosphere for 900 s. The modified biopolymers were characterised in terms of chemical composition, surface morphology as well as surface free energy measurements. Changes in surface topography and an increase in roughness were observed for both materials modified in N$_{2}$ plasma. The largest increase in the polar component of the surface energy was observed for PEEK modified in oxygen plasma, for PU in Ar atmosphere.
Projekt innowacyjnego mechanizmu posuwisto-zwrotnego napędzającego żerdź przenośnika zabierakowego
(Wydawnictwa AGH, 2024) Kopacz, Karolina
The article presents a project of a reciprocating-reversing mechanism driving a prototype of a lunar regolith conveyor. The article includes both CAD models of this mechanism and its subsequent prototypes. In the summary, plans for the future are outlined, where a research facility will be designed with the aim of investigating the movement characteristics for optimizing the mechanism parameters. The results of these studies may have significant implications for the efficiency and performance of the rod scraper conveyor.
Stanowisko badawcze do demonstracji działania dźwiękochłonnych metamateriałów akustycznych w falowodach o przekroju okrągłym
(Wydawnictwa AGH, 2024) Książek, Piotr
This paper is concerned with the construction of a demonstration kit to illustrate the applications of acoustic resonance-based suppressors in the context of narrowband industrial noise suppression. The kit consists of two main components – a circular waveguide and interchangeable silencer elements inserted into the waveguide channel. The functionality of the attenuators is demonstrated using an application that compares the acoustic spectrum of the signal recorded at the outlet of the waveguide without the attenuators installed and with the attenuators in place. Construction steps of the demonstration kit are presented as well as the process of optimising the geometry of the resonator dampers and the difficulties of using 3D printing in the manufacturing processes of acoustic metamaterials are presented. The possibilities of using the demonstration set in the context of teaching, science communication and tackling acoustic noise pollution were also discussed. The broad possibilities for further development of the design, particularly the potential for use in prototyping new geometries of acoustic metamaterials were also addressed.
Emerytowani pracownicy naukowi – okoliczności towarzyszące przejściu w stan spoczynku
(Wydawnictwa AGH, 2024) Maksymowicz, Agata
In today’s world, particularly in Europe, the issue of aging is of significant interest for social researchers. Increased life expectancy, advances in medicine, and declining birth rates mean that we live in an increasingly aging society. The subject of this article is the circumstances surrounding the retirement of academic employees from universities in Krakow. This particular stage of a person’s life signifies the end (often gradual) of what is usually a several-decades-long professional career. How do retired scholars perceive this period, is the decision to retire made independently by the scholars themselves, what assistance do they receive during this special time, and how do they prepare for this new stage of life? These questions are part of a broader research project conducted by a team of four staff members from the Faculty of Humanities at AGH University of Krakow.
Contains
Access rights
Access: otwarty dostęp
Rights: AGH Licence (University Press)
Licencja AGH (University Press) - Fair use of copyrighted works