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31 Results Found

  • Article
  • Open Access
2 Citations
1,412 Views
13 Pages

29 September 2024

Solar filaments are a significant solar activity phenomenon, typically observed in full-disk solar observations in the H-alpha band. They are closely associated with the magnetic fields of solar active regions, solar flare eruptions, and coronal mass...

  • Article
  • Open Access
587 Views
8 Pages

Forbush Effects Associated with Disappeared Solar Filaments

  • Olga Kryakunova,
  • Botakoz Seifullina,
  • Maria Abunina,
  • Nataly Shlyk,
  • Artem Abunin,
  • Nikolay Nikolayevskiy and
  • Irina Tsepakina

17 June 2025

The Forbush effects (FEs) in cosmic rays associated with interplanetary disturbances caused by the disappearance of solar filaments (DSFs) outside active regions (ARs) are considered. In total, 481 FEs were detected for 1995–2023 using the data...

  • Article
  • Open Access
2,044 Views
17 Pages

27 April 2024

Solar filaments are good tracers of space weather and magnetic flux ropes in the corona. Identifying and detecting filaments helps to forecast space weather and explore the solar magnetic field. Many automatic detection methods have been proposed to...

  • Brief Report
  • Open Access
2 Citations
2,401 Views
5 Pages

10 November 2021

Electromagnetic expulsion acts on a body suspended in a conducting fluid or plasma, which is subject to the influence of electric and magnetic fields. Physically, the effect is a magnetohydrodynamic analogue of the buoyancy (Archimedean) force, which...

  • Article
  • Open Access
46 Citations
14,160 Views
16 Pages

The growth of both plastic consumption and prosumer 3-D printing are driving an interest in producing 3-D printer filaments from waste plastic. This study quantifies the embodied energy of a vertical DC solar photovoltaic (PV) powered recyclebot base...

  • Article
  • Open Access
650 Views
15 Pages

Mechanical Performance of Ceria-Coated 3D-Printed Black Zirconia Cellular Structures After Solar Thermochemical CO/H2 Fuel Production Cycles

  • Fernando A. Costa Oliveira,
  • Manuel Sardinha,
  • Joaquim M. Justino Netto,
  • Miguel Farinha,
  • Marco Leite,
  • M. Alexandra Barreiros,
  • Stéphane Abanades and
  • Jorge Cruz Fernandes

8 July 2025

Solar fuels production requires developing redox active materials with porous structures able to withstand thermochemical cycles with enhanced thermal stability under concentrated solar irradiation conditions. The mechanical performance of 3D-printed...

  • Article
  • Open Access
7 Citations
2,413 Views
11 Pages

Manufacturing and Thermal Shock Resistance of 3D-Printed Porous Black Zirconia for Concentrated Solar Applications

  • Fernando Almeida Costa Oliveira,
  • Manuel Sardinha,
  • José Galindo,
  • José Rodríguez,
  • Inmaculada Cañadas,
  • Marco Leite and
  • Jorge Cruz Fernandes

29 August 2023

A novel approach for manufacturing porous materials, foreseen as solar receivers for concentrated sun radiation, used in the power tower technology is presented. In such applications, materials are subjected to steep thermal gradients and thousands o...

  • Article
  • Open Access
416 Views
16 Pages

Two Cases of Non-Radial Filament Eruption and Associated CME Deflection

  • Kostadinka Koleva,
  • Ramesh Chandra,
  • Pooja Devi,
  • Peter Duchlev and
  • Momchil Dechev

30 June 2025

The purpose of this paper is to analyze the multi-wavelength and multi-instrument observations of two quiescent filament eruptions as well as the deflection of associated CMEs from the radial direction. The events occurred on 18 October 2017 and 9 Ma...

  • Article
  • Open Access
4 Citations
2,067 Views
20 Pages

28 October 2021

Failed filament eruption remains mysterious on its initiation, magnetic environment, and erupting and failing mechanisms. We present multi-wavelength observations of a failed filament eruption and its associated hovered coronal mass ejection (hovered...

  • Article
  • Open Access
34 Citations
7,197 Views
24 Pages

13 October 2020

Imagery from unoccupied aerial vehicles (UAVs) is useful for mapping floating and emerged primary producers, as well as single taxa of submerged primary producers in shallow, clear lakes and streams. However, there is little research on the effective...

  • Article
  • Open Access
1 Citations
1,289 Views
26 Pages

Optimization of Solar Corrosion Fenton Reactor for the Recovery of Textile Wastewater: In Situ Release of Fe2+

  • Ana Fernanda Tenorio-Hernández,
  • Ivonne Linares-Hernández,
  • Luis Antonio Castillo-Suárez,
  • Verónica Martínez-Miranda and
  • Carolina Álvarez-Bastida

12 January 2025

A Solar Corrosion Fenton reactor (SCFr) was developed by packing an iron-carbon steel filament inside the reactor to enable the in situ release of Fe2+. A Box–Behnken experimental design was used to optimize the effect of HRT (20, 30, and 40 mi...

  • Article
  • Open Access
10 Citations
7,213 Views
20 Pages

3D Reconstruction of Coronal Loops by the Principal Component Analysis

  • Giuseppe Nisticò,
  • Erwin Verwichte and
  • Valery M. Nakariakov

22 October 2013

Knowing the three dimensional structure of plasma filaments in the uppermost part of the solar atmosphere, known as coronal loops, and especially their length, is an important parameter in the wave-based diagnostics of this part of the Sun. The combi...

  • Article
  • Open Access
28 Citations
7,068 Views
24 Pages

Optimization of Curvilinear Tracing Applied to Solar Physics and Biophysics

  • Markus J. Aschwanden,
  • Bart De Pontieu and
  • Eugene A. Katrukha

26 July 2013

We developed an automated pattern recognition code that is particularly well suited to extract one-dimensional curvilinear features from two-dimensional digital images. A former version of this Oriented Coronal Curved Loop Tracing (OCCULT) code was a...

  • Article
  • Open Access
1,267 Views
14 Pages

Magnetic Filaments: Formation, Stability, and Feedback

  • Evgeny A. Kuznetsov and
  • Evgeny A. Mikhailov

26 February 2024

As is well known, magnetic fields in space are distributed very inhomogeneously. Sometimes, field distributions have forms of filaments with high magnetic field values. As many observations show, such a filamentation takes place in convective cells i...

  • Article
  • Open Access
2,020 Views
18 Pages

Solar Energy Driven Membrane Desalination: Experimental Heat Transfer Analysis

  • Hosam Faqeha,
  • Mohammed Bawahab,
  • Quoc Linh Ve,
  • Oranit Traisak,
  • Ravi Koirala,
  • Aliakbar Akbarzadeh and
  • Abhijit Date

29 October 2022

In the direct contact membrane distillation (DCMD) system, the temperature polarization due to boundary layer formation limits the system performance. This study presents the experimental results and heat transfer analysis of a DCMD module coupled wi...

  • Article
  • Open Access
8 Citations
2,507 Views
15 Pages

Black TiO2-Based Dual Photoanodes Boost the Efficiency of Quantum Dot-Sensitized Solar Cells to 11.7%

  • Danwen Yao,
  • Zhenyu Hu,
  • Ruifeng Zheng,
  • Jialun Li,
  • Liying Wang,
  • Xijia Yang,
  • Wei Lü and
  • Huailiang Xu

2 December 2022

Quantum dot-sensitized solar cells (QDSSC) have been regarded as one of the most promising candidates for effective utilization of solar energy, but its power conversion efficiency (PCE) is still far from meeting expectations. One of the most importa...

  • Article
  • Open Access
8 Citations
3,420 Views
15 Pages

Sunspot Detection Using YOLOv5 in Spectroheliograph H-Alpha Images

  • José Santos,
  • Nuno Peixinho,
  • Teresa Barata,
  • Carlos Pereira,
  • A. Paulo Coimbra,
  • Manuel M. Crisóstomo and
  • Mateus Mendes

9 May 2023

Solar activity has been subject to increasingly more research in the last decades. Its influence on life on Earth is now better understood. Solar winds impact the earth’s magnetic field and atmosphere. They can disrupt satellite communication a...

  • Article
  • Open Access
2 Citations
2,185 Views
16 Pages

Cyanobacterial Pigments as Natural Photosensitizers for Dye-Sensitized Solar Cells

  • Tatiana Montagni,
  • Mauricio Ávila,
  • Sofía Fernández,
  • Sylvia Bonilla and
  • María Fernanda Cerdá

12 September 2024

Three filamentous freshwater cyanobacterial strains were grown at high light intensity to produce lipidic dyes composed of xanthophylls, carotenes, and chlorophyll a. The properties of the pigments were evaluated as suitable natural compounds to be a...

  • Article
  • Open Access
7 Citations
2,072 Views
22 Pages

Fused Filament Fabrication of Polyethylene/Graphene Composites for In-Space Manufacturing

  • Susanna Laurenzi,
  • Federica Zaccardi,
  • Elisa Toto,
  • Maria Gabriella Santonicola,
  • Sabina Botti and
  • Tanya Scalia

19 April 2024

Graphene-based composite materials are highly sought after for space applications due to their ability to encompass various properties, such as electrical conductivity, thermal resistance, and radiation shielding. This versatility allows for the crea...

  • Article
  • Open Access
2 Citations
1,788 Views
15 Pages

A Partial Eruption of a Sigmoid Filament in the Small Dipole Active Region 12734

  • Jihong Liu,
  • Yin Zhang,
  • Yuhong Zheng,
  • Yu Liu and
  • Jie Chen

16 January 2024

We present a detailed analysis of a partial eruption of a sigmoid filament lying along the polarity inversion line (PIL) of the small active region (AR) NOAA 12734 (with an area of 1.44 ×103 square megameters). The active filament was rooted in...

  • Article
  • Open Access
10 Citations
2,157 Views
14 Pages

23 January 2023

The Rad4-Rad23-Rad33 complex plays an essential anti-ultraviolet (UV) role depending on nucleotide excision repair (NER) in budding yeast but has been rarely studied in filamentous fungi, which possess two Rad4 paralogs (Rad4A/B) and orthologous Rad2...

  • Article
  • Open Access
3 Citations
2,383 Views
23 Pages

Advancing CubeSats Capabilities: Ground-Based Calibration of Uvsq-Sat NG Satellite’s NIR Spectrometer and Determination of the Extraterrestrial Solar Spectrum

  • Mustapha Meftah,
  • Christophe Dufour,
  • David Bolsée,
  • Lionel Van Laeken,
  • Cannelle Clavier,
  • Amal Chandran,
  • Loren Chang,
  • Alain Sarkissian,
  • Patrick Galopeau and
  • Alain Hauchecorne
  • + 18 authors

30 September 2024

Uvsq-Sat NG is a French 6U CubeSat (10 × 20 × 30 cm) of the International Satellite Program in Research and Education (INSPIRE) designed primarily for observing greenhouse gases (GHG) such as CO2 and CH4, measuring the Earth’s radia...

  • Review
  • Open Access
42 Citations
11,438 Views
27 Pages

20 September 2021

A major challenge with current wearable electronics and e-textiles, including sensors, is power supply. As an alternative to batteries, energy can be harvested from various sources using garments or other textile products as a substrate. Four differe...

  • Article
  • Open Access
13 Citations
2,383 Views
15 Pages

25 October 2022

Beauveria bassiana serves as a main source of global fungal insecticides, which are based on the active ingredient of formulated conidia vulnerable to solar ultraviolet (UV) irradiation and restrained for all-weather application in green agriculture....

  • Review
  • Open Access
72 Citations
8,699 Views
10 Pages

The fungal genus Wallemia of the order Wallemiales (Wallemiomycotina, Basidiomycota) comprises the most xerotolerant, xerophilic and also halophilic species worldwide. Wallemia spp. are found in various osmotically challenged environments, such as dr...

  • Article
  • Open Access
6 Citations
4,302 Views
16 Pages

Bulk Tungsten Fiber-Reinforced Tungsten (Wf/W) Composites Using Yarn-Based Textile Preforms

  • Alexander Lau,
  • Jan Willem Coenen,
  • Daniel Schwalenberg,
  • Yiran Mao,
  • Till Höschen,
  • Johann Riesch,
  • Leonard Raumann,
  • Michael Treitz,
  • Hanns Gietl and
  • Alexis Terra
  • + 4 authors

4 May 2023

The use of tungsten fiber-reinforced tungsten composites (Wf/W) has been demonstrated to significantly enhance the mechanical properties of tungsten (W) by incorporating W-fibers into the W-matrix. However, prior research has been restricted by the u...

  • Article
  • Open Access
2 Citations
1,186 Views
23 Pages

Survival of Filamentous Cyanobacteria Through Martian ISRU: Combined Effects of Desiccation and UV-B Radiation

  • Miguel Arribas Tiemblo,
  • Inês P. E. Macário,
  • Antonio Tornero,
  • Ana Yáñez,
  • Slavka Andrejkovičová and
  • Felipe Gómez

Cyanobacteria are a widespread group of photosynthesizing prokaryotes potentially relevant for space exploration, as they can produce both oxygen and organic matter. These organisms have been repeatedly proposed as tools for colonizing planetary bodi...

  • Article
  • Open Access
38 Citations
5,877 Views
18 Pages

Melting polar and alpine ice surfaces frequently exhibit blooms of dark pigmented algae. These microbial extremophiles significantly reduce the surface albedo of glaciers, thus accelerating melt rates. However, the ecology, physiology and taxonomy of...

  • Article
  • Open Access
4 Citations
3,413 Views
20 Pages

Microbial Diversity and Community Structure of Wastewater-Driven Microalgal Biofilms

  • Olga Blifernez-Klassen,
  • Julia Hassa,
  • Diana L. Reinecke,
  • Tobias Busche,
  • Viktor Klassen and
  • Olaf Kruse

Dwindling water sources increase the need for efficient wastewater treatment. Solar-driven algal turf scrubber (ATS) system may remediate wastewater by supporting the development and growth of periphytic microbiomes that function and interact in a hi...

  • Article
  • Open Access
390 Views
25 Pages

Observations of the Formation of a Proto-Spot in a Pre-Existing Field Environment

  • Mariarita Murabito,
  • Ilaria Ermolli,
  • Salvo L. Guglielmino,
  • Paolo Romano and
  • Fabrizio Giorgi

22 March 2025

Bipolar emerging flux regions (EFRs) form active regions (ARs) that generally evolve into a pre-existing magnetic environment in the solar atmosphere. Reconfiguration of the small- and large-scale magnetic connectivities is invoked to explain a pleth...

  • Article
  • Open Access
11 Citations
6,862 Views
16 Pages

Investigating Algal Communities in Lacustrine and Hydro-Terrestrial Environments of East Antarctica Using Deep Amplicon Sequencing

  • Yuu Hirose,
  • Takuhei Shiozaki,
  • Masahiro Otani,
  • Sakae Kudoh,
  • Satoshi Imura,
  • Toshihiko Eki and
  • Naomi Harada

Antarctica has one of the most extreme environments on Earth, with low temperatures and low nutrient levels. Antarctica’s organisms live primarily in the coastal, ice-free areas which cover approximately 0.18% of the continent’s surface....