Search results for "HT"
showing 10 items of 20594 documents
A Guide to Perform 3D Histology of Biological Tissues with Fluorescence Microscopy
2023
The analysis of histological alterations in all types of tissue is of primary importance in pathology for highly accurate and robust diagnosis. Recent advances in tissue clearing and fluorescence microscopy made the study of the anatomy of biological tissue possible in three dimensions. The combination of these techniques with classical hematoxylin and eosin (H&E) staining has led to the birth of three-dimensional (3D) histology. Here, we present an overview of the state-of-the-art methods, highlighting the optimal combinations of different clearing methods and advanced fluorescence microscopy techniques for the investigation of all types of biological tissues. We employed fluorescence …
SfM Techniques Applied in Bad Lighting and Reflection Conditions: The Case of a Museum Artwork
2019
In recent years, SfM techniques have been widely used especially in the field of Cultural Heritage. Some applications, however, remain undefined in cases where the boundary conditions are not suitable for the technique. Examples of this are instances where there are poor lighting conditions and the presence of glass and reflective surfaces. This paper presents a case study where SfM is applied, using a DSLR camera (Nikon D5200), to the “Head of Hades” inside a glass theca and under a large number of light sources at different distances and of different intensities and sizes. The geometric evaluation has been made comparing the DSLR camera model against the 3D data acquired with structured l…
P3HT plānu kārtiņu īpašību pētījumi 3D printētu termoelektrisko ierīču pielietojumiem
2019
Šajā darbā tika veikti pētījumi ar poli (3-heksiltiofēna) (P3HT) plānajām kārtiņām ar mērķi novērtēt šī materiāla pielietojamību 3D printētās termoelektriskās ierīcēs. Darbā tika pētītas tīras dažādu polimerizāciju pakāpes P3HT plānās kārtiņas un kārtiņas, kas ir dopētas ar (2,3,5,6-Tetrafluoro-2,5-cikloheksadiēn-1,4-dilidēn)-dimalonodinitrilu (F4TCNQ). Šīm kārtiņām tika noteikta elektrovadītspēja, Zēbeka koeficienti kā arī jaudas faktora vērtības. Lai varētu novērtēt šo vielu pielietojamību 3D printēšanai, to veidotās plānās kārtiņas tika karsētas un noteikti to raksturojošie koeficienti pēc katras karsēšanas. Šī karsēšana simulē apstākļus, kādiem tiktu pakļauti materiāli 3D printēšanas pr…
EXTERNAL RECIRCULATION IN PRS TYPE TURBINE: EXPERIMENTAL AND NUMERICAL RESULTS.
2022
Cavitation is a relevant phenomenon for structural safety and noise level in hydraulic turbines, occurring when water pressure falls below the vapor value at a given temperature. In this case bubbles of vapor grow inside the liquid and move along with it. When the pressure returns above the vapor value the bubble collapses, and the pressure can locally achieve very high values, up to 7000 bars (Kumar & Saini, 2010). Moreover, if the bubble was confined also by the solid wall of a blade, the solid particles suspended in the fluid can be transported by the fluid ones and hit the solid wall at very high velocity, generating erosion. Cavitation is also the source of high frequency noise, ve…
Non-symmetrized Hyperspherical Harmonics Method for Non-equal Mass Three-Body Systems
2018
The non-symmetrized hyperspherical harmonics method for a three-body system, composed by two particles having equal masses, but different from the mass of the third particle, is reviewed and applied to the $^3$H, $^3$He nuclei and $^3_{\Lambda}$H hyper-nucleus, seen respectively as $nnp$, $ppn$ and $NN\Lambda$ three-body systems. The convergence of the method is first tested in order to estimate its accuracy. Then, the difference of binding energy between $^3$H and $^3$He due to the difference of the proton and the neutron masses is studied using several central spin-independent and spin-dependent potentials. Finally, the $^3_{\Lambda}$H hypernucleus binding energy is calculated using diffe…
The emerging role of 3D printing in the fabrication of detection systems
2021
Abstract 3D printing is fast evolving as an additive manufacturing technique that has been adopted in (bio)analytical science because of the ample variety of materials and technologies currently available for highly affordable prototyping. This review focuses on the unique characteristics of 3D printing for manufacturing of optical and electrochemical detection systems, and sampling interfaces for analytical purposes using fused deposition modelling, vat polymerization (stereolithography and digital light processing) and photopolymer inkjet printing. The majority of works surveyed within the time span of mid-2018 to mid-2020 encompassed the fabrication of several components of the detection…
Comparison of the shear bond strength of 3D printed temporary bridges materials, on different types of resin cements and surface treatment
2019
Background Thus, purpose of this study was to compare the shear bond strength of the resin cement and the resin modified glass ionomer cement on 3D printed temporary material for crowns and bridges in combination with different surface treatment modalities. Material and methods Test specimens VarseoSmile Temp material (Bego, Bremen, Germany) (n=64) in the form of rectangular blocks (n=32) and cylindrical test specimens (n=32) were printed using the Varseo S 3D printer (Bego, Bremen, Germany). The specimens were divided into 4 groups, with 8 specimens of each kind. Two groups (n=16 pairs) were blasted with Perlablast® Micro [PM] 50µm (Bego, Bremen, Germany) and two groups (n=16 pairs) were b…
Lämpösähköisen materiaalin lämmönjohtavuuden määrittäminen matalissa lämpötiloissa käyttäen 3ω-menetelmää
2014
Työssä tutkittiin mittausmenetelmää lämmönjohtavuuden määrittämiseen mata- lissa lämpötiloissa. Mittaukset perustuivat 3ω menetelmään, joka on alunperin ohut- kalvoille kehitetty menetelmä lämmönjohtavuuden mittaukseen. Menetelmässä läm- mitinlangan läpi kulkeva vaihtovirta synnyttää kolminkertaisella taajudella olevan jännitteen, jonka avulla saadaan tietoa kappaleen termisistä ominaisuuksista. Mit- tauksissa kultainen lämmitinlanka höyrystettiin Kapton kalvon päälle ja tämän päälle hyvin ohut alumiinioksidikerros. Mittaukset suoritettiin pulssituubijäähdyttimeen ra- kennetussa näytteenpitimessä. Laitteiston toiminta varmistettiin huoneenlämpötilas- sa borosilikaatti- ja Kapton näytteillä.…
CCDC 1437668: Experimental Crystal Structure Determination
2015
Related Article: M. Akhazzane, G. Al Houari, M. El Yazidi, M. Saadi, L. El Ammari|2015|Acta Crystallogr.,Sect.E:Cryst.Commun.|71|o981|doi:10.1107/S2056989015022033
CCDC 1849905: Experimental Crystal Structure Determination
2018
Related Article: A. Piontek, D. Siodłak, B. Zarychta|2018|IUCrData|3|x180889|doi:10.1107/S2414314618008891