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Tytuł:
fucking with grammar
Autorzy:
Aboim, Mariana
Powiązania:
https://bibliotekanauki.pl/articles/31343001.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Warszawski. Ośrodek Studiów Amerykańskich
Tematy:
practice-led research
fine art
language
cisheteronormativity
embodied experience
Opis:
Art practices occupy a space of liminality within academia, being valid, appropriate to illustrate questions and discourses in social sciences and humanities, and not sufficient in mainstream academia to assert what art foregrounds as ‘knowledge’. So, what happens when art has something to claim through non-academic methods of inquiry? Even more complicated, what happens when art allows putting forward theoretical hypothesis involving the immateriality of affect? Departing from a practice-led research focusing on the endurance of white, cisgender, and heteropatriarchic impositions, as well as the ways these impositions materialise themselves on the body, this paper explores the possibilities of Fucking with grammar, a writing method developed throughout the writing of my PhD research. Linguistics has been stretched for centuries by QUILTBAG individuals — queer and questioning, unsure, intersex, lesbian, transgender and two-spirit, bisexual, asexual and aromantic, gay and genderqueer; swardspeak, lavender, and code-switching all entail ways of reshaping and creating language as response to socio-political necessities, camouflage, or simply to access a jargon that can be more faithful to practices and embodiments of the group creating it. However, there is a different kind of reclaiming emerging, when performance artist, actress, and activist Linn da Quebrada utters “I am a cisgender woman with one breast and a penis,” she is committing the kind of epistemic disobedience that undoes epistemology. Here, I focus on disobediences that bring western epistemologies to collapse. These challenges that contribute to what Denise Ferreira da Silva calls “the end of the world as we know it” (2014). To end what ‘we’ know requires a different ‘how’, it entails methodological deployments that help bringing into crisis academic hierarchies regarding [research] corroborability. Questioning after Audre Lorde: how does one make tangible the immeasurable and unpredictable without being averted and undercut by the tools still sustaining the master’s house? The approach I propose here is Fucking with grammar. Fucking with is associated with messing with someone; fuck you or fuck me is negatively perceived; in sex, ‘fuck you’ or ‘fuck me’ is one-sided — the act of fucking should be fucking with, because even when saying ‘I want to fuck you’ it is still necessary more than one person for this ‘fucking’ to actually happen. Similarly, in English, the correct preposition following the verb ‘to dream’ is ‘of’ or ‘about’, which makes absolutely no sense: because when one is dreaming, one is embedded in a withness that ‘of’ or ‘about’ cannot account for. This piece shares how I fuck with grammar within a practice-led PhD research: applying Portuguese and Turkish grammar structures to English, generating verbs or nouns out of adjectives and vice versa[s]. Fucking with grammar is a mode of surpassing some of language’s limitations when speaking of that which is immaterial; it is a semantic slap in the face calling for decolonisation of one’s immediacy of logic when assuming typos and linguistic ignorance within writings not following English normativities. I t is a method that contributes to a broader challenge to formats sustaining hierarchies around what is considered ‘academic’ research.
Źródło:
InterAlia: Pismo poświęcone studiom queer; 2023, 18; 116-127
1689-6637
Pojawia się w:
InterAlia: Pismo poświęcone studiom queer
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wysokość mandatów za naruszenie przepisów ruchu drogowego w wybranych państwach członkowskich UE: Czechy, Francja, Irlandia, Litwa, Szwecja, Włochy
Financial sanctions for traffic violations in selected EU Member States: Czech Republic, France, Ireland, Lithuania, Sweden, Italy
Autorzy:
Adamiec, Danuta
Dziewulak, Dobromir
Krawczyk, Kaja
Żołądek, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2194647.pdf
Data publikacji:
2022
Wydawca:
Kancelaria Sejmu. Biuro Analiz Sejmowych
Tematy:
traffic law
fine
offenses
Czech Republic
France
Ireland
Lithuania
Sweden
Italy
Opis:
The study discusses the amount of financial sanctions (financial penalties or fines) for selected categories of traffic violations in the indicated countries. The focus was on those categories of violations of road traffic regulations, regarding which the Bill Amending the Act on Road Traffic Law and Some Other Acts (Sejm’s paper no. 1504) provided for changes as to financial amounts of fines.
Źródło:
Zeszyty Prawnicze BAS; 2022, 1(73); 277-298
1896-9852
2082-064X
Pojawia się w:
Zeszyty Prawnicze BAS
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical simulation of the fine blanking process of sheet titanium
Symulacja numeryczna procesu wykrawania dokładnego blach tytanowych
Autorzy:
Adamus, J.
Lacki, P.
Więckowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/351330.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dokładne wykrawanie
blacha tytanowa
symulacja numeryczna
fine blanking
sheet titanium
numerical modelling
Opis:
The present study has been undertaken in order to investigate the new possibilities of improvement in quality of the cut-surface of titanium blanks. For the intended purpose, a number of numerical simulations of the blanking process were carried out. Fine blanking is one of the most often used methods of finished product manufacturing. Application of blanking with reduced clearance or blanking with material upsetting by V-ring indenter allows for obtaining the high quality cut-surface which does not need further machining. Application of the finite element method (FEM) for numerical simulations allows for effective analysis of the fine blanking processes. In the paper the results of numerical simulation of fine blanking for a disk made of Grade 2 sheet titanium have been presented. The calculations were carried out using ADINA System v. 8.6 based on FEM. Determination of the effect of clearance between cutting edges, and presence and location of V-ring indenter on the stress and strain distribution in shearing zone was the main goal of the work. The numerical simulations showed the effect of tool geometry on a course of blanking process and consequently on the quality and shape of the cut-surface. Based on the numerical simulation it is only possible to deduce the cut-surface appearance, thus the numerical simulations should be completed with experimental tests.
Niniejsza praca została wykonana w celu zbadania nowych możliwości poprawy jakości powierzchni przecięcia wykrojek tytanowych. W tym celu wykonano szereg symulacji numerycznych procesu wykrawania. Wykrawanie dokładne jest najczęściej stosowaną metodą otrzymywania wyrobów gotowych. Zastosowanie wykrawania ze zmniejszonym luzem lub wykrawania ze spęczaniem za pomocą klinowej grani pozwala na otrzymanie wysokiej jakości powierzchni przecięcia, ktä nie wymaga dalszej obróbki mechanicznej. Wykorzystanie w symulacjach numerycznych metody elementów skończonych (MES) pozwala na efektywną analizę procesów wykrawania dokładnego. W artykule zaprezentowano wyniki symulacji numerycznej wykrawania dokładnego krążka z blachy tytanowej Grade 2. Obliczenia wykonano przy użyciu programu ADINA System v. 8.6 opartego na MES. Głównym celem pracy było określenie wpływu luzu pomiędzy krawędziami tnącymi oraz obecności klinowej grani na dociskaczu na rozkład naprężeń i odkształceń w obszarze cięcia. Obliczenia numeryczne wykazały wpływ geometrii narzędzi na przebieg procesu wykrawania, a tym samym na jakość i kształt powierzchni przecięcia. Opierając się na symulacjach numerycznych można jedynie wnioskować o wyglądzie powierzchni przecięcia, dlatego symulacje numeryczne powinny być uzupełnione badaniami doświadczalnymi.
Źródło:
Archives of Metallurgy and Materials; 2011, 56, 2; 431-437
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Study for Soil Modification Cement Grouting
Autorzy:
Ahmadpour, Majid
Powiązania:
https://bibliotekanauki.pl/articles/102581.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
experimental study
soil modification
micro fine cement
grouting
badania eksperymentalne
modyfikacja gleby
mikrogranulat
fugowanie
Opis:
Soil modification with Portland cement is the most common practice in geotechnical engineering. The application of micro-fine cement causes proper intrusion of the provided slurry into the soil voids and consequently decreases the porosity to a greater quantity. In order to determine the utility and behavior of cements with different blains, non-destructive and destructive tests such as grain-size distribution of cements by laser-ray, sedimentation, permeability and compressive strength were employed. The results of experimental studies and observations demonstrated a suitable mix-design for upper and lower parts of the cement-grading curve that are of prime importance for grouting and stabilization. Meanwhile, by increasing the fineness of the cement, the permeability decreases to a considerable extent and the compressive strength increases. Moreover, the blain content close to 5000 cm2/gr application led to the optimization of the effect of void reduction in a grouted soil mass compared to the lower and higher amount of blain content. The results of various tests indicate that an optimum blain can be used to achieve the designed geotechnical criteria.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 2; 141-149
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Using of Adhesives and Binders for Agglomeration of Particle Waste Resources
Autorzy:
Alsaqoor, Sameh
Borowski, Gabriel
Alahmer, Ali
Beithou, Nabil
Powiązania:
https://bibliotekanauki.pl/articles/2201761.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
adhesives
binders
waste
fine coal
fine-grained iron
fly ash
Opis:
This review presents the usage of adhesives and binders for agglomeration of particle materials, including waste, in order to obtain strong bodies. The binding materials were classified into three categories: inorganic binders, organic binders, and compound binders. Many examples of the agglomeration effect of binders in view of their adhesive and thickening reveal that they have a significant impact on the qualities and use of waste lumps. Binders for fine waste granulation, briquetting, and pelletizing were demonstrated in-depth. In all cases, the mechanical strength of the agglomerates produced was increased. It was observed that the majority of the additives may be easily obtained from waste resources, posing a minimal environmental risk.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 3; 124--135
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Description of Cochliopodium megatetrastylus n. sp. Isolated from a Freshwater Habitat
Autorzy:
Anderson, O. Roger
Tekle, Yonas I.
Powiązania:
https://bibliotekanauki.pl/articles/763483.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Amoebozoa, comparative morphology, fine structure, molecular genetics, taxonomy
Opis:
Cochliopodium megatetrastylus n. sp. is described based on light microscopy, fine structure and molecular genetic evidence. Amoebae are broadly oval to somewhat triangular during locomotion with average length of 37 μm and breadth of 50 μm, and surrounded by a hyaloplasm margin, somewhat narrow when at rest but more expanded during locomotion (~ 5–10 μm at the anterior). Sparsely occurring subpseudopodia, barely emergent from the hyaloplasm, are blunt and finger-like, occasionally becoming adhesive laterally or at the posterior. Cysts develop after 2–3 weeks in culture and are round with a distinct margin, decreasing in size from 20 to 5 μm during maturation. The granuloplasm contains refractile crystals. A vesicular nucleus (~ 6 μm), containing a nucleolus (2–3 μm), is variable in shape from somewhat lenticular in section to irregularly rounded with undulating or lobed margins. Surface scales (~ 0.3 μm in height) have an apical deeply concave funnel-like collar (~ 0.15 μm deep), without a spine, composed of radial fine rays and concentric filaments forming a finemesh, supported on four non-cross-linked styles (~ 0.2 μm apart) attached to a round to broadly angular base plate (0.6–1 μm) with a fine gridtexture. Cysts are rounded and enclosed by an organic wall bearing remnants of the scales on its outer surface. Both concatenated analysis of SSU-rDNA and COI genes and comparative morphologies support the designation of Cochliopodium megatetrastylus n. sp. as a new species.
Źródło:
Acta Protozoologica; 2013, 52, 2
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrastructure of Diplophrys parva, a New Small Freshwater Species, and a Revised Analysis of Labyrinthulea (Heterokonta)
Autorzy:
Anderson, O. Roger
Cavalier-Smith, Thomas
Powiązania:
https://bibliotekanauki.pl/articles/763447.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego
Tematy:
Diplophryidae, fine structure, molecular genetics, Labyrinthomyxa, labyrinthulean taxonomy
Opis:
We describe Diplophrys parva n. sp., a freshwater heterotroph, using fine structural and sequence evidence. Cells are small (L = 6.5 ± 0.08, W = 5.5 ± 0.06 µm; mean ± SE) enclosed by an envelope/theca of overlapping scales, slightly oval to elongated-oval with rounded ends, (1.0 × 0.5–0.7 µm), one to several intracellular refractive granules (~ 1.0–2.0 µm), smaller hyaline peripheral vacuoles, a nucleus with central nucleolus, tubulo-cristate mitochondria, and a prominent Golgi apparatus with multiple stacked saccules (~ 10). It is smaller than published sizes of Diplophrys archeri (~ 10–20 µm), modestly less than Diplophrys marina (~ 5–9 µm), and differs in scale size and morphology from D. marina. No cysts were observed. We transfer D. marina to a new genus Amphifila as it falls within a mo-lecular phylogenetic clade extremely distant from that including D. parva. Based on morphological and molecular phylogenetic evidence, Labyrinthulea are revised to include six new families, including Diplophryidae for Diplophrys and Amphifilidae containing Amphifila. The other new families have distinctive morphology: Oblongichytriidae and Aplanochytriidae are distinct clades on the rDNA tree, but Sorodiplophryidae and Althorniidae lack sequence data. Aplanochytriidae is in Labyrinthulida; the rest are in Thraustochytrida; Laby-rinthomyxa is excluded.
Źródło:
Acta Protozoologica; 2012, 51, 4
1689-0027
Pojawia się w:
Acta Protozoologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative analysis of process parameters of talc mechanical activation in centrifugal and attrition mill
Autorzy:
Andric, L.
Terzic, A.
Acimovic-Pavlovic, Z.
Pavlovic, L.
Petrov, M.
Powiązania:
https://bibliotekanauki.pl/articles/110391.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
talc
mechanical activation
ultra fine grinding
ultra-centrifugal mill
attrition mill
Opis:
The efficiency of talc mechanical activation by means of two different mechano-activators - centrifugal and attrition mill is investigated in this study and the comparative analysis of the characteristics of obtained talc powders is presented. A new approach for obtaining high-grade talc concentrate with low Fe2O3 content is achieved through effect of mechanical activation of talc accompanied by hydrometallurgical process. The applied mechanical activation process conditions of ultra-centrifugal mill were defined by number of rotor revolutions, sieve mesh size, and current intensity. These operating parameters of the ultra-centrifugal mill were variable. Ultra fine grinding of talc in attrition mill (attritor) was carried out in various time intervals - from 5 to 15 min. The following technological parameters of the mechanical activation were monitored: time of mechanical activation, circumferential rotor speed, capacity of ultra-centrifugal mill, and specific energy consumption. The investigation was based on a kinetic model. The structure and behavior of activated samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and differential thermal analysis (DTA).
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 2; 433-452
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modes of \((\alpha)\)-convergence of sequences of functions
Autorzy:
Athanassiadou, E.
Boccuto, A.
Papanastassiou, N.
Powiązania:
https://bibliotekanauki.pl/articles/746661.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
sympathetic convergence, fine convergence, sympathetic-\(\alpha\)-convergence, fine-\(\alpha\)-convergence
Opis:
In this paper we deal with continuous convergence and some related properties of sequences of functions. We present some conditions to get uniform convergence of the sequence involved to a constant function. As an application, we give a result on equivalence between modes of convergence.
Źródło:
Commentationes Mathematicae; 2013, 53, 1
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Novel Approach to the Screw Feeder Design to Improve the Reliability of Briquetting Process in the Roller Press
Autorzy:
Baiul, Kostiantyn
Vashchenko, Serhii
Khudyakov, Olexander
Bembenek, Michał
Zinchenko, Andrii
Krot, Pavlo V.
Solodka, Nataliia
Powiązania:
https://bibliotekanauki.pl/articles/27312771.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
fine-grained materials
briquetting
roller press
screw feeder
optimal design
compaction coefficient
Opis:
The screw feeder design for the pre-compaction of bulk materials to be briquetted in a roll press is considered to increase the overall reliability. The relationship between the parameters of the screw feeder and its technological characteristics is investigated by the example of two fine-grained materials. A new mathematical model and design algorithm have been developed, which takes into account the properties of materials, the roller press parameters, the shape of the briquettes, and their deformation after compaction. The relationship between the pre-compaction pressure and the material stack height at the inlet is determined. The relations between the torque, the screw pitch, and the material stack height above the inlet, as well as the drive power and the screw pitch on productivity, are investigated. In experiments, using the proposed design, the compaction ratio of the peat increases by 22-27%, and hydrolyzed lignin –by 14-17%. The proposed approach allows for preventing drive overloading and ensures the reliable operation of pre-compaction devices for the roller presses.
Źródło:
Eksploatacja i Niezawodność; 2023, 25, 3; art. no. 167967
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimizing ultrasound image classification through transfer learning: fine-tuning strategies and classifier impact on pre-trained inner-layers
Optymalizacja klasyfikacji obrazów ultrasonograficznych techniką transfer learning: strategie dostrajania i wpływ klasyfikatora na wstępnie wytrenowane warstwy wewnętrzne
Autorzy:
Bal-Ghaoui, Mohamed
Alaoui, Hachem El Yousfi
Jilbab, Abdelilah
Bourouhou, Abdennaser
Powiązania:
https://bibliotekanauki.pl/articles/27315459.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
CNN
transfer learning
fine-tuning
SVM
ultrasound images
cancer classification
dostrajanie
obraz ultrasonograficzny
klasyfikacja nowotworów
Opis:
Transfer Learning (TL) is a popular deep learning technique used in medical image analysis, especially when data is limited. It leverages pre-trained knowledge from State-Of-The-Art (SOTA) models and applies it to specific applications through Fine-Tuning (FT). However, fine-tuning large models can be time-consuming, and determining which layers to use can be challenging. This study explores different fine-tuning strategies for five SOTA models (VGG16, VGG19, ResNet50, ResNet101, and InceptionV3) pre-trained on ImageNet. It also investigates the impact of the classifier by usinga linear SVM for classification. The experiments are performed on four open-access ultrasound datasets related to breast cancer, thyroid nodules cancer, and salivary glands cancer. Results are evaluated using a five-fold stratified cross-validation technique, and metrics like accuracy, precision, and recall are computed. The findings show that fine-tuning 15% of the last layers in ResNet50 and InceptionV3 achieves good results. Using SVM for classification further improves overall performance by 6% for the two best-performing models. This research provides insights into fine-tuning strategiesandthe importance of the classifier in transfer learning for ultrasound image classification.
Transfer Learning (TL) to popularna technika głębokiego uczenia stosowana w analizie obrazów medycznych, zwłaszcza gdy ilość danych jestograniczona. Wykorzystuje ona wstępnie wyszkoloną wiedzę z modeli State-Of-The-Art (SOTA) i zastosowanie ich do konkretnych aplikacji poprzez dostrajanie (Fine-Tuning –FT). Jednak dostrajanie dużych modeli może być czasochłonne, a określenie, których warstw użyć, może stanowić wyzwanie.W niniejszym badaniu przeanalizowano różne strategie dostrajania dla pięciu modeli SOTA (VGG16, VGG19, ResNet50, ResNet101 i InceptionV3) wstępnie wytrenowanych na ImageNet. Zbadano również wpływ klasyfikatora przy użyciu liniowej SVM do klasyfikacji. Eksperymenty przeprowadzonona czterech ogólnodostępnych zbiorach danych ultrasonograficznych związanych z rakiem piersi, rakiem guzków tarczycy i rakiemgruczołów ślinowych. Wyniki są oceniane przy użyciu techniki pięciowarstwowej walidacji krzyżowej, a wskaźniki takie jak dokładność, precyzja i odzyskiwanie są obliczane. Wyniki pokazują, że dostrojenie 15% ostatnich warstw w ResNet50 i InceptionV3 osiąga dobre wyniki. Użycie SVM do klasyfikacjidodatkowo poprawia ogólną wydajność o 6% dla dwóch najlepszych modeli. Badania te zapewniają informacje na temat strategii dostrajania i znaczenia klasyfikatoraw uczeniu transferowym dla klasyfikacji obrazów ultrasonograficznych.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2023, 13, 4; 27--33
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technetium-99m : from nuclear medicine applications to fi ne sediment transport studies
Autorzy:
Bandeira, J. V.
Salim, L. H.
Powiązania:
https://bibliotekanauki.pl/articles/971527.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
fine sediment transport
99mTc
mathematical modelling
environmental impacts
water environment
Opis:
The present work is a contribution to rescue the history of development of the application of 99mTc, widely used in nuclear medicine, to its use as tracer for the study of the transport of fi ne sediment in suspension, in water environment. It addresses the usefulness of its application in obtaining important parameters in environmental studies, illustrating them with some applications already performed and the results obtained. This kind of study, when associated with information on hydrodynamic parameters, for example, river, tidal, wind and wave currents, are powerful tools for the understanding and quantification of fi ne sediment transport in suspension. Fine sediment is an important vector in the transportation of heavy metals, organic matter and nutrients in water environment, and the quantitative knowledge of its behaviour is mandatory for studies of environmental impacts. Fine sediment labelled with 99mTc, can also be used to study the effect of human interventions, such as dredging of reservoirs, access channels and harbours, and the dumping of dredged materials in water bodies. Besides that, it can be used to optimize dredging works, evaluating the technical and economic feasibility of dumping sites and their environmental impact. It is a valuable support in the calibration and validation of mathematical models for sediment dynamics.
Źródło:
Nukleonika; 2017, 62, 4; 295-302
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
2D metal halide perovskites: a new fascinating playground for exciton fine structure investigations
Autorzy:
Baranowski, Michał
Dyksik, Mateusz
Płochocka, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/35108251.pdf
Data publikacji:
2022
Wydawca:
Radomskie Towarzystwo Naukowe
Tematy:
2D perovskites
exciton
fine structure
dark exciton states
perowskity 2D
ekscyton
struktura subtelna
stany ciemne ekscytonu
Opis:
Two-dimensional (2D) metal halide perovskites are natural quantum wells which consist of low bandgap metal-halide slabs, surrounded by organic spacers barriers. The quantum and dielectric confinements provided by the organic part lead to the extreme exciton binding energy which results in a huge enhancement of exciton fine structure in this material system. This makes 2D perovskites a fascinating playground for fundamental excitonic physics studies. In this review, we summarize the current understanding and quantification of the exciton fine structure in 2D perovskites. We discuss what is the role of exciton fine structure in the optical response of 2D perovskites and how it challenges our understanding of this fundamental excitation. Finally, we highlight some controversy related to particularly large bright-dark exciton states splitting and high efficiency of light emission from these materials. This can result from the unique synergy of excitonic and mechanical properties of 2D perovskites crystals.
Źródło:
Scientiae Radices; 2022, 1, 1; 3-25
2956-4808
Pojawia się w:
Scientiae Radices
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ALTERNATIVE EXISTENCE OF ART IN “INTERNAL EMIGRATION” IN SLOVAK PART OF CZECHOSLOVAKIA IN YEARS 1977–1989
The alternative existence of art in “inner emigration” in the Slovak part of Czechoslovakia in years 1977–1989
Autorzy:
BÁTOROVÁ, MÁRIA
Powiązania:
https://bibliotekanauki.pl/articles/776919.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Slovak and Czech dissident movement
silent alternative
samizdat
literature
fine art
Libri prohibiti archive
Opis:
This paper presents a comparison of Slovak and Czech dissidents, the origin of the so-called “silent” dissent, alternative art in Slovakia in the years of normalization, mostly after 1977.
Źródło:
Slavia Occidentalis; 2018, 75/2; 59-67
0081-0002
Pojawia się w:
Slavia Occidentalis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engineering properties of self-compacting concrete incorporating PET fibres and recycled fine concrete aggregates
Autorzy:
Bayah, Meriem
Debieb, Farid
Kadri, El-Hadj
Bentchikou, Mohamed
Powiązania:
https://bibliotekanauki.pl/articles/27314441.pdf
Data publikacji:
2023
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
polyethylene terephthalate fibres
recycled fine concrete aggregates
flexural strength
self-compacting concrete
Opis:
Concrete is currently the most frequently used material in the building sector due to its favourable properties. However, the proliferation of waste poses a significant environmental problem. Over the past three decades, researchers have explored the use of construction and demolition waste (CDW) as well as plastic waste as aggregates, binders, and fibres in construction materials. This approach has emerged as a notable solution to address environmental and economic challenges. The objective of this research is to assess the impact of polyethylene terephthalate fibres (PETF) on the behaviour of self-compacting concrete (SCC) with recycled fine concrete aggregates (RFCA). Natural fine aggregates (NFA) were used as a substitute for RFCA at different mass fractions (0–100%). Additionally, four volumetric fractions (Vf) of PETF (ranging from 0.3% to 1.2%) were added, and the findings revealed an improvement in the flexural strength and modulus of elasticity of the composite material obtained. However, as the Vf content of PET fibres and RFCA increased, the compressive strength decreased, negatively affecting water absorption by immersion and capillary water absorption. Using 100% RFCA and 1.2% PETF enhanced the modulus of elasticity and flexural strength of recycled self-compacting concrete (RSCC) by up to 25% and 9%, respectively.
Źródło:
Budownictwo i Architektura; 2023, 22, 4; 71--95
1899-0665
Pojawia się w:
Budownictwo i Architektura
Dostawca treści:
Biblioteka Nauki
Artykuł

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