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40 Results Found

  • Article
  • Open Access
14 Citations
7,818 Views
10 Pages

The BKT Universality Class in the Presence of Correlated Disorder

  • Ilaria Maccari,
  • Lara Benfatto and
  • Claudio Castellani

The correct detection of the Berezinskii-Kosterlitz-Thouless (BKT) transition in quasi-two-dimensional superconductors still remains a controversial issue. Its main signatures, indeed, are often at odds with the theoretical expectations. In a recent...

(This article belongs to the Special Issue SuperFluctuations)
  • Article
  • Open Access
24 Citations
4,637 Views
25 Pages

Chlamydomonas reinhardtii is a unicellular green alga that can grow heterotrophically by using acetate as a carbon source. Carotenoids are natural pigments with biological activity and color, which have functions such as antioxidant, anti-inflammator...

(This article belongs to the Section Molecular Plant Sciences)
  • Article
  • Open Access
76 Citations
11,476 Views
16 Pages

Comparative Study of Ferroelectric and Piezoelectric Properties of BNT-BKT-BT Ceramics near the Phase Transition Zone

  • David Andres Fernandez-Benavides,
  • Aixa Ibeth Gutierrez-Perez,
  • Angelica Maria Benitez-Castro,
  • Maria Teresa Ayala-Ayala and ,
  • Barbara Moreno-Murguia and
  • Juan Muñoz-Saldaña
  • + 1 author+ 0 author

1 March 2018

We report a comprehensive comparative study of ferroelectric and piezoelectric properties of BNT-BKT-BT ceramics through the MPB (morphotropic phase boundary) zone, from the rhombohedral to the tetragonal phases in the system (97.5−x)(Bi0.5Na0.5)TiO3...

  • Article
  • Open Access
763 Views
42 Pages

FAR-BKT: Fuzzy Adaptive Revision of Static Educational Content Using Bayesian Knowledge Tracing

  • Michail Tselepatiotis,
  • Konstantina Chrysafiadi and
  • Efthimios Alepis

24 September 2026

Predefined educational content provides curricular control and consistent quality but remains non-personalized when all learners receive the same sequence and amount of practice. This study proposes Fuzzy Adaptive Revision with Bayesian Knowledge Tra...

(This article belongs to the Special Issue Fuzzy Optimization Method and Application)
  • Article
  • Open Access
470 Views
31 Pages

9 October 2026

We study a one-dimensional fractional U(1) Ginzburg–Landau model whose quadratic part has Fourier multiplier |k|σ, focusing on the marginal case σ=1. This dispersion yields logarithmic spin-wave fluctuations, suggesting BKT-like beh...

(This article belongs to the Section E4: Mathematical Physics)
  • Article
  • Open Access
15 Citations
3,727 Views
18 Pages

Complex Phase-Fluctuation Effects Correlated with Granularity in Superconducting NbN Nanofilms

  • Meenakshi Sharma,
  • Manju Singh,
  • Rajib K. Rakshit,
  • Surinder P. Singh and ,
  • Matteo Fretto,
  • Natascia De Leo,
  • Andrea Perali and
  • Nicola Pinto
  • + 3 authors+ 0 author

22 November 2022

Superconducting nanofilms are tunable systems that can host a 3D–2D dimensional crossover leading to the Berezinskii–Kosterlitz–Thouless (BKT) superconducting transition approaching the 2D regime. Reducing the dimensionality further...

(This article belongs to the Special Issue Novel Research in Low-Dimensional Systems)
  • Article
  • Open Access
23 Citations
23,068 Views
17 Pages

An Introduction to Bayesian Knowledge Tracing with pyBKT

  • Okan Bulut,
  • Jinnie Shin,
  • Seyma N. Yildirim-Erbasli,
  • Guher Gorgun and
  • Zachary A. Pardos

23 July 2023

This study aims to introduce Bayesian Knowledge Tracing (BKT), a probabilistic model used in educational data mining to estimate learners’ knowledge states over time. It also provides a practical guide to estimating BKT models using the pyBKT l...

(This article belongs to the Special Issue Computational Aspects and Software in Psychometrics II)
  • Article
  • Open Access
2 Citations
1,287 Views
16 Pages

8 December 2025

Astaxanthin is a high-value ketocarotenoid antioxidant, but its industrial production from Haematococcus pluvialis is constrained by multi-stage cultivation and a rigid cell wall that hinders downstream extraction. The marine diatom Phaeodactylum tri...

(This article belongs to the Section Marine Biotechnology Related to Drug Discovery or Production)
  • Article
  • Open Access
2 Citations
888 Views
11 Pages

Berezinskii–Kosterlitz–Thouless Quantum Transition in Two Dimensions

  • M. Cristina Diamantini,
  • Carlo A. Trugenberger and
  • Valerii M. Vinokur

26 February 2026

The Berezinskii–Kosterlitz–Thouless (BKT) transition is the prototype of a phase transition driven by the formation and interaction of topological defects in two-dimensional (2D) systems. In typical models, these are vortices: above a tra...

(This article belongs to the Section Quantum Materials)
  • Article
  • Open Access
10 Citations
3,293 Views
14 Pages

Engineered Chlamydomonas reinhardtii Strains for Enhanced Astaxanthin Production

  • Federico Perozeni,
  • Margherita Angelini,
  • Matteo Ballottari and
  • Stefano Cazzaniga

20 May 2025

Microalgae have evolved a diverse carotenoid profile, enabling efficient light harvesting and photoprotection. Previous studies have demonstrated the feasibility of genome editing in the green algal model species Chlamydomonas reinhardtii, leading to...

(This article belongs to the Special Issue Algae—a Step Forward in the Sustainability of Resources: 2nd Edition)
  • Article
  • Open Access
7 Citations
3,885 Views
12 Pages

19 December 2022

Lithium-sulfur batteries (LSBs) have attracted extensive attention due to their high energy density and low cost. The separator is a key component of LSBs. An excellent LSBs separator requires not only good electrolyte wettability, but also high ther...

(This article belongs to the Special Issue Synthesis and Application of Cellulose-Based Composites)
  • Article
  • Open Access
27 Citations
4,559 Views
13 Pages

7 May 2020

The effects of simulated waterlogging, drought stress and their combination were examined in a model experiment in Martonvásár, Hungary, in 2018. Four modern winter wheat varieties (‘Mv Toborzó’ (TOB), ‘Mv Mamb&...

(This article belongs to the Section Water, Agriculture and Aquaculture)
  • Article
  • Open Access
11 Citations
6,450 Views
16 Pages

Entropy and Mutability for the q-State Clock Model in Small Systems

  • Oscar A. Negrete,
  • Patricio Vargas,
  • Francisco J. Peña,
  • Gonzalo Saravia and
  • Eugenio E. Vogel

6 December 2018

In this paper, we revisit the q-state clock model for small systems. We present results for the thermodynamics of the q-state clock model for values from q = 2 to q = 20 for small square lattices of L × L , with L ranging...

(This article belongs to the Special Issue The 20th Anniversary of Entropy - Recent Advances in Entropy and Information-Theoretic Concepts and Their Applications)
  • Article
  • Open Access
2 Citations
1,976 Views
13 Pages

In-Plane Anisotropy of Electrical Transport in Y0.85Tb0.15Ba2Cu3O7−x Films

  • Matvey Lyatti,
  • Ines Kraiem,
  • Torsten Röper,
  • Irina Gundareva and ,
  • Gregor Mussler,
  • Abdur Rehman Jalil,
  • Detlev Grützmacher and
  • Thomas Schäpers
  • + 3 authors+ 0 author

24 January 2024

We fabricated high-quality c-axis-oriented epitaxial YBa2Cu3O7−x films with 15% of the yttrium atoms replaced by terbium (YTBCO) and studied their electrical properties. The Tb substitution reduced the charge carrier density, resulting in incre...

(This article belongs to the Section Thin Films and Interfaces)
  • Article
  • Open Access
8 Citations
4,234 Views
27 Pages

The use of advanced adaptive algorithms in Augmented Reality (AR) systems works to advance spatial skills with valuable relevance in many professional spheres by providing personalized feedback in an immersive environment. This study combines Bayesia...

(This article belongs to the Collection Augmented Reality Technologies, Systems and Applications)
  • Proceeding Paper
  • Open Access
156 Views
8 Pages

8 October 2026

Digital tutoring systems require real-time modeling of learners’ hidden states. In this study, we develop a unified machine learning model that integrates Bayesian knowledge tracing (BKT) with ensemble-based off-task detection to address latent...

  • Communication
  • Open Access
5 Citations
3,986 Views
12 Pages

Heterologous Production in the Synechocystis Chassis Suggests the Biosynthetic Pathway of Astaxanthin in Cyanobacteria

  • Hanyu Liang,
  • Hongjuan Chen,
  • Xinya Liu,
  • Zihan Wang and ,
  • Pengfu Li and
  • Shan Lu
  • + 1 author+ 0 author

3 October 2023

Astaxanthin is a carotenoid species with the highest antioxidant capability. Its natural resource is very rare. The biosynthesis of astaxanthin from β-carotene includes a hydroxylation step and a ketolation step, for which the corresponding enzy...

(This article belongs to the Section Natural and Synthetic Antioxidants)
  • Article
  • Open Access
6 Citations
4,089 Views
13 Pages

Short-Range Berezinskii-Kosterlitz-Thouless Phase Characterization for the q-State Clock Model

  • Oscar A. Negrete,
  • Patricio Vargas,
  • Francisco J. Peña,
  • Gonzalo Saravia and
  • Eugenio E. Vogel

7 August 2021

Beyond the usual ferromagnetic and paramagnetic phases present in spin systems, the usual q-state clock model presents an intermediate vortex state when the number of possible orientations q for the system is greater than or equal to 5. Such vortex s...

(This article belongs to the Special Issue Entropy: The Scientific Tool of the 21st Century)
  • Article
  • Open Access
5 Citations
3,181 Views
20 Pages

17 July 2024

The in vitro biotransformation of phenol at 11 °C was studied using pre-spawn adult rainbow (Oncorhynchus mykiss) (RBT), brook (Salvelinus fontinalis) (BKT), and lake trout (Salvelinus namaycush) (LKT) hepatic microsomal preparations. The incubat...

(This article belongs to the Special Issue Advances in Rainbow Trout)
  • Article
  • Open Access
67 Citations
11,744 Views
20 Pages

21 September 2012

The isolation and characterization of the lycopene ε-cyclase gene from the green microalga Chlorella (Chromochloris) zofingiensis (Czlcy-e) was performed. This gene is involved in the formation of the carotenoids α-carotene and lutein. Czlcy-e gene e...

  • Article
  • Open Access
123 Views
29 Pages

Understanding how the cognitive processes underlying second language (L2) reading comprehension change over time is crucial for characterizing reading development among English as a Foreign Language (EFL) learners. Guided by Kintsch’s Construct...

(This article belongs to the Section Studies on Cognitive Processes)
  • Article
  • Open Access
2 Citations
3,547 Views
9 Pages

Possible Evidence for Berezinskii–Kosterlitz–Thouless Transition in Ba(Fe0.914Co0.086)2As2 Crystals

  • Wen-He Jiao,
  • Xiao-Feng Xu,
  • Hao Jiang,
  • Zhu-An Xu and ,
  • Qing-Hu Chen and
  • Guang-Han Cao
  • + 1 author+ 0 author

22 October 2021

In this study, we measure the in-plane transport properties of high-quality Ba(Fe0.914Co0.086)2As2 single crystals. Signatures of vortex unbinding Berezinskii–Kosterlitz–Thouless (BKT) transition are shown from both the conventional approach and the...

(This article belongs to the Section Materials Physics)
  • Article
  • Open Access
13 Citations
5,207 Views
14 Pages

Ralstonia eutropha strain H16 is a chemoautotrophic bacterium that oxidizes hydrogen and accumulates poly[(R)-3-hydroxybutyrate] [P(3HB)], a prominent polyhydroxyalkanoate (PHA), within its cell. R. eutropha utilizes fructose or CO2 as its sole carbo...

(This article belongs to the Special Issue Advances in Polyhydroxyalkanoate (PHA) Production, 4th Edition)
  • Review
  • Open Access
1 Citations
3,585 Views
10 Pages

First and Second Sound in Two-Dimensional Bosonic and Fermionic Superfluids

  • Luca Salasnich,
  • Alberto Cappellaro,
  • Koichiro Furutani,
  • Andrea Tononi and
  • Giacomo Bighin

17 October 2022

We review our theoretical results of the sound propagation in two-dimensional (2D) systems of ultracold fermionic and bosonic atoms. In the superfluid phase, characterized by the spontaneous symmetry breaking of the U(1) symmetry, there is the coexis...

(This article belongs to the Section D: Chemistry: Symmetry/Asymmetry)
  • Article
  • Open Access
6 Citations
2,707 Views
11 Pages

23 October 2024

We propose spin models that can display an arbitrary number of phase transitions. The models are based on the standard XY model, which is generalized by including higher-order nematic terms with exponentially increasing order and linearly increasing...

(This article belongs to the Section Statistical Physics)
  • Article
  • Open Access
12 Citations
4,873 Views
23 Pages

The banking sector plays a key role in the economic, social, and political development of a country. The study of the financial performance of banks is essential for investors, creditors, and other interested parties. The aim of this research was to...

(This article belongs to the Special Issue Banking Profitability and Efficiency in Emerging Economies)
  • Article
  • Open Access
232 Views
11 Pages

Effect of Activated Carbon as an Additive on the Anaerobic Digestion of Food Wastewater

  • Jae-Hyuk Lee,
  • Hyo-Jin Shin,
  • Yeo-Bon Seo,
  • Jae-Seong Lee and ,
  • Jun-Hyeong Lee and
  • Young-Man Yoon
  • + 1 author+ 0 author

11 October 2026

Activated carbon (AC) may improve methane production, but its performance can depend on substrate loading and incubation time. This study evaluated 60-day batch anaerobic digestion of food wastewater at 38 °C using substrate-to-inoculum (S/I) rat...

(This article belongs to the Topic Advances in Biomass and Bioenergy)
  • Article
  • Open Access
15 Citations
8,408 Views
15 Pages

Detection of Selection Signatures on the X Chromosome in Three Sheep Breeds

  • Caiye Zhu,
  • Hongying Fan,
  • Zehu Yuan,
  • Shijin Hu and ,
  • Li Zhang,
  • Caihong Wei,
  • Qin Zhang,
  • Fuping Zhao and
  • Lixin Du
  • + 4 authors+ 0 author

28 August 2015

Artificial selection has played a critical role in animal breeding. Detection of artificial selection footprints in genomic regions can provide insights for understanding the function of specific phenotypic traits and better guide animal breeding. To...

(This article belongs to the Section Biochemistry)
  • Article
  • Open Access
1 Citations
3,010 Views
17 Pages

Analysis of Genetic Factors Defining Head Blight Resistance in an Old Hungarian Wheat Variety-Based Mapping Population

  • Emese Varga-László,
  • Katalin Puskás,
  • Balázs Varga,
  • Zsuzsanna Farkas and ,
  • Ottó Veisz and
  • Gyula Vida
  • + 1 author+ 0 author

3 August 2020

One of the most important limiting factors of high-quality wheat production is Fusarium head blight infection. The various Fusarium species not only may cause severe yield loss but—due to toxin production—the grains also might become unsu...

(This article belongs to the Special Issue Breeding Healthy Cereals: Genetic Improvement of Fusarium Resistance)
  • Article
  • Open Access
3 Citations
1,012 Views
14 Pages

Acute Combination of Nitrogen Deprivation and High Irradiance Induces the Simultaneous Accumulation of Astaxanthin and Lutein in Continuous Cultures of the Microalga Chromochloris zofingiensis

  • María Morales-Pineda,
  • Mercedes García-González,
  • M. Elena García-Gómez,
  • Francisco J. Romero-Campero and
  • Marcos Ramos-González

14 March 2026

Carotenoids play a central role in photosynthesis and cellular protection, and microalgae represent a sustainable platform for their commercial production. Here, we optimized the accumulation of the high-value carotenoids astaxanthin and lutein in co...

(This article belongs to the Section Plant Physiology and Metabolism)
  • Article
  • Open Access
49 Citations
10,766 Views
12 Pages

CRISPR/Cas9-Mediated Knockout of the Lycopene ε-Cyclase for Efficient Astaxanthin Production in the Green Microalga Chlamydomonas reinhardtii

  • Jacob Sebastian Kneip,
  • Niklas Kniepkamp,
  • Junhwan Jang,
  • Maria Grazia Mortaro and ,
  • EonSeon Jin,
  • Olaf Kruse and
  • Thomas Baier
  • + 2 authors+ 0 author

17 May 2024

Carotenoids are valuable pigments naturally occurring in all photosynthetic plants and microalgae as well as in selected fungi, bacteria, and archaea. Green microalgae developed a complex carotenoid profile suitable for efficient light harvesting and...

(This article belongs to the Special Issue Microalgae Photobiology, Biotechnology, and Bioproduction)
  • Article
  • Open Access
1 Citations
2,297 Views
17 Pages

Magnetocaloric Effect for a Q-Clock-Type System

  • Michel Aguilera,
  • Sergio Pino-Alarcón,
  • Francisco J. Peña,
  • Eugenio E. Vogel and ,
  • Natalia Cortés and
  • Patricio Vargas
  • + 1 author+ 0 author

27 December 2024

In this work, we study the magnetocaloric effect (MCE) in a working substance corresponding to a square lattice of spins with Q possible orientations, known as the “Q-state clock model”. When the Q-state clock model has Q≥5 possible co...

(This article belongs to the Section Statistical Physics)
  • Article
  • Open Access
2 Citations
2,245 Views
18 Pages

Comparison of Radial Ply and Cross Ply Tire in Terms of Achieved Rolling Resistance and Soil Compaction in a Soil Test Channel

  • Milan Helexa,
  • Jozef Krilek,
  • Ján Kováč,
  • Tomáš Kuvik and ,
  • Vladimír Mancel,
  • Rudolf Abrahám and
  • Radoslav Majdan
  • + 2 authors+ 0 author

10 August 2024

Many literature sources state that radial ply tires achieve lower rolling resistance values than cross ply tires. From a certain point of view, radial ply tires are gentler on the ground than cross ply tires. The effort was therefore to experimentall...

(This article belongs to the Section Forest Operations and Engineering)
  • Article
  • Open Access
2 Citations
2,236 Views
27 Pages

Toxicological Effects of Silver-Modified Bentonite Nanocomposites on Microalgae: Impact on Cell Growth, Antioxidant Enzymes, and Gene Expression

  • Oumayma Ghariani,
  • Jihen Elleuch,
  • Anna Maria Ferretti,
  • Stefano Econdi and ,
  • Chiara Bisio,
  • Philippe Michaud,
  • Imen Fendri,
  • Matteo Guidotti and
  • Slim Abdelkafi
  • + 4 authors+ 0 author

20 April 2025

The increasing use of nanostructured silver-containing inorganic materials raises concerns about their impact on aquatic organisms. This study assessed the toxicity of silver-modified bentonite composites on Chlamydomonas sp. Two materials were teste...

(This article belongs to the Section Nanocomposite Materials)
  • Article
  • Open Access
334 Views
29 Pages

3 September 2026

We formulate a gauge-invariant phenomenological theory for a charged three-component condensate in an anisotropic layered superconductor. The construction is conditional on a material-specific pairing calculation selecting an isolated, predominantly...

(This article belongs to the Section Theoretical and Computational Chemistry)
  • Article
  • Open Access
16 Citations
1,584 Views
31 Pages

TSA-GRU: A Novel Hybrid Deep Learning Module for Learner Behavior Analytics in MOOCs

  • Soundes Oumaima Boufaida,
  • Abdelmadjid Benmachiche,
  • Makhlouf Derdour,
  • Majda Maatallah and ,
  • Moustafa Sadek Kahil and
  • Mohamed Chahine Ghanem
  • + 1 author+ 0 author

5 August 2025

E-Learning is an emerging dominant phenomenon in education, making the development of robust models that can accurately represent the dynamic behavior of learners in MOOCs even more critical. In this article, we propose the Temporal Sparse Attention-...

  • Article
  • Open Access
13 Citations
4,855 Views
20 Pages

Highest Cost First-Based QoS Mapping Scheme for Fiber Wireless Architecture

  • Khalid.H. Mohammadani,
  • Rizwan Aslam Butt,
  • Kamran Ali Memon,
  • Fayaz Hassan and ,
  • Abdul Majeed and
  • Rajesh Kumar
  • + 1 author+ 0 author

22 November 2020

The combination of a high-speed wireless network with passive optical network technologies has led to the evolution of a modern integrated fiber wireless (FiWi) access network. Compared to broadband wireless networks, the FiWi network offers higher b...

(This article belongs to the Section Optical Communication and Network)
  • Article
  • Open Access
1 Citations
2,044 Views
32 Pages

30 April 2026

The integration of Artificial Intelligence into educational systems has accelerated dramatically with the advent of Large Language Models (LLMs). However, two critical limitations constrain current AI-powered tutoring systems: LLMs hallucinate factua...

(This article belongs to the Section Computing and Artificial Intelligence)
  • Article
  • Open Access
723 Views
32 Pages

14 July 2026

Despite widespread adoption of cybersecurity awareness training (CSAT), a persistent knowledge–behaviour gap continues to undermine organisational security posture, particularly in resource-constrained and developing-country contexts. This 12-w...

(This article belongs to the Special Issue AI-Driven Information Analytics for Cybersecurity and Privacy)
  • Article
  • Open Access
5 Citations
2,190 Views
19 Pages

Large Stress-Gradient Creep Tests and Model Establishment for Red Sandstone Treated at High Temperatures

  • Xiaopeng Ren,
  • Yajun Xin,
  • Baoshan Jia,
  • Kun Gao and ,
  • Xuping Li and
  • Yu Wang
  • + 1 author+ 0 author

20 October 2022

Red sandstone samples treated at high temperatures feature complex creep properties. Uniaxial compression tests and the incremental creep tests at different stress gradients were conducted on 10 red sandstone samples of the same specifications divide...