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Preprint ARTICLE | doi:10.20944/preprints202409.1134.v1

The Mother's Day Solar Storm of 11 May 2024 and Its Effect on Earth's Radiation Belts

Viviane Pierrard, Alexandre Winant, Edith Botek, Maximilien Péters de Bonhome

Subject: Physical Sciences, Space Science Keywords: geomagnetic storm; solar energetic particles; solar event; radiation belts; energetic protons; relativistic electrons

Online: 14 September 2024 (10:38:34 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202209.0070.v1

Density and Velocity Analysis of the Planetary Nebula NGC 6853

Robert Hrubý

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Nebula; NGC 6853; Stellar; Planetary nebula; Deep space; remnant

Online: 5 September 2022 (14:08:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0718.v1

Operative Benefits of Residential Battery Storage for Decarbonizing Energy Systems: A German Case Study

Natapon Wanapinit, Nils Offermann, Connor Thelen, Christoph Kost, Christian Rehtanz

Subject: Engineering, Energy And Fuel Technology Keywords: prosumer; battery storage; energy system; transmission grid; optimization

Online: 10 April 2024 (09:52:14 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.1253.v1

A Doublet State palladium(I) N-heterocyclic Carbene Complex as a Dopant and Stabilizer for Improved Photostability in Organic Solar Cells

Aliah El Astal-Quirós, Valentina Carrarini, Francesca Zarotti, Atiq Ur Rahman, Agustí Lledós, Cristina G. Yebra, Ernesto de Jesús, Andrea Reale

Subject: Engineering, Electrical And Electronic Engineering Keywords: inverted organic solar cells; dopant; organometallic molecule; palladium; optoelectronic improvment; morphology; stability

Online: 17 July 2024 (04:25:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202011.0633.v1

Hot-Air Extermination of Insects: The Only Sustainable Method for Historical Timber Constructions

Jaroslav Solar, Petr Alexa

Subject: Engineering, Automotive Engineering Keywords: wooden structures; wood-borer; thermal flow; listed buildings

Online: 25 November 2020 (11:03:39 CET)

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Preprint ARTICLE | doi:10.20944/preprints202409.0268.v1

Trends in the Occurrence of Compound Extremes of Temperature and Precipitation in Côte d’Ivoire

Elisée Yapo AKOBE, Adama DIAWARA, Fidèle YOROBA, Benjamin K. KOUASSI, Assi Louis Martial YAPO, Ibrahima DIBA, Kouakou KOUADIO, Dro T. TIÉMOKO, Dianikoura Ibrahim KONÉ, Arona Diedhiou

Subject: Physical Sciences, Other Keywords: CORDEX-Africa; compound extremes; precipitation; temperature; Cô; te d’ Ivoire

Online: 3 September 2024 (20:03:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0121.v1

Heat Load Profiles in Industry and the Tertiary Sector: Correlation with Electricity Consumption and Ex Post Modelling

Mateo Jesper, Felix Pag, Klaus Vajen, Ulrike Jordan

Subject: Engineering, Energy And Fuel Technology Keywords: load profiles; electricity; heat; industry; correlation; machine learning; LSTM; prediction; anomaly detection

Online: 8 March 2022 (09:23:34 CET)

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Preprint ARTICLE | doi:10.20944/preprints202405.0548.v1

An Analytical Approach to Power Optimization of Concentrating Solar Power Plants with Thermal Storage

Andrii Cheilytko, Spiros Orestis Alexopoulos, Andriy Pozhuyev, Oliver Kaufhold

Subject: Engineering, Energy And Fuel Technology Keywords: concentrated solar power; thermal storage; hybrid solar power plants; design factor; solar multiple factor; optimization model; analytical approach

Online: 10 May 2024 (03:32:28 CEST)

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Preprint REVIEW | doi:10.20944/preprints202401.2222.v1

Proton Pump Inhibitors in Pediatric Gastroesophageal Reflux Disease: A Systematic Review of Randomised Controlled Trials

Sara María Fernández-González, Ana Moreno-Álvarez, Alfonso Solar-Boga

Subject: Medicine And Pharmacology, Pediatrics, Perinatology And Child Health Keywords: gastroesophageal reflux disease; efficacy; safety; proton-pump inhibitors; pediatric patients; systematic review

Online: 31 January 2024 (14:59:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1475.v1

Optical turbulence vertical distribution at the Peak Terskol Observatory and Mt. Kurapdag

Artem Yu. Shikhovtsev ---, Evgeniy A. Kopylov, Sergey A. Potanin, Pavel G. Kovadlo, Chun Qing

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: optical turbulence; profiles; Fried parameter; the air refractive index structure constant Cn2.

Online: 25 March 2024 (11:25:51 CET)

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Preprint REVIEW | doi:10.20944/preprints202402.1318.v1

Methods for Quantifying Expansion in Lithium-Ion Battery Cells Resulting from Cycling: A Review

Tessa Krause, Daniel Nusko, Luciana Pitta Bauermann, Matthias Vetter, Marcel Schäfer, Carlo Holly

Subject: Physical Sciences, Chemical Physics Keywords: lithium-ion; battery cells; expansion measurements; volume expansion; thickness changes

Online: 22 February 2024 (16:12:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints202405.0376.v1

Comparative Study of Electrical Loads Forecasting Based on Hybrid Approaches: Discrete Wavelet Transforms with Adaboost and LSTM

Kabe Moyème, Bokovi Yao, Kwami Senam Sedzro, Takouda Pidéname, Lare Yendoubé

Subject: Engineering, Electrical And Electronic Engineering Keywords: optimal management; electricity demand; prediction model; ensemble regression; discrete wavelets

Online: 7 May 2024 (10:51:22 CEST)

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The dynamic evolution and variation of electrical loads is now a priority for optimum management and, above all, forecasting. Indeed, these dynamic load variations require computer tools able to implement optimal load forecasting models. Scientific research into automated models for forecasting electrical loads therefore represents a challenge for scientific researchers. Several research studies have therefore been carried out. These include machine learning approaches such as: LSTM (Long Short-Term Memory), Support Vector Machine (SVM) and others. This article proposes a comparison study between a hybrid model based on the wavelet transform coupled with the adaboost method, and LSTM, for forecasting electricity consumption loads. Python 3.10 was used for the studies. The first results obtained consisted in the study of electricity load forecasts over four (04) data sets of the year (January, April, August and December). These results are very satisfactory, showing a good correlation between the real results of the electrical load consumption data, and the results of the implemented model. The electrical load consumption data are collected from a renewable energy production source: photovoltaic solar energy. The model test results (R2) obtained range from 0.919 to 0.958. These results are representative of real data and reflect the model's performance. The second set of results concerns a comparative study between the methods used by Y. Xie et al (CNN, MLP, LSTM-AM and LSTM-AM-MLP), and our approach. The prediction results obtained between the approaches show a prediction gap ranging from 0.15 to 0.78 for RMSE and 0.83 for MAPE. These results show significant differences between the methods. The minimization of errors by our model, therefore, reflects the model's performance in terms of accuracy, which is necessary for the optimal management of consumer electricity load forecasts in order to ensure balance between supply and demand.

Preprint ARTICLE | doi:10.20944/preprints202405.2062.v1

IFU Spectroscopic Study of the Planetary Nebula Abell 30: Mapping the Ionization and Kinematic Structure of the Inner Complex

Kam Ling Chan, Quentin Andrew Parker, Andreas Ritter

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Planetary nebulae; Abell 30; Integral spectroscopy; Kinematics; velocity maps; Binary system; born-again scenario; wolf rayet central star; hydrogen deficient CSPN

Online: 30 May 2024 (13:43:19 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1592.v1

New Physically-Based Mathematical Model and Experiments for a Recently Invented Solar Pot

Márton Rátkai, Gábor Géczi, Richárd Kicsiny, László Székely

Subject: Engineering, Mechanical Engineering Keywords: solar cooking; solar pot; mathematical modelling; simulation results; measurements

Online: 24 June 2024 (08:16:07 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.1669.v1

Bullfights, Advances or Setbacks? A Global and Local Perspective, from Animal Law

Pedro Luis Bracho-Fuenmayor, Nicolás Del Solar-Duarte

Subject: Social Sciences, Law Keywords: bullfighting; global; local; animal law

Online: 22 July 2024 (09:40:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0928.v1

Transmission Spectroscopy Along the Transit of Venus: A Proxy for Exoplanets Atmospheric Characterization

Alexandre Baptista Branco, Pedro Machado, Olivier Demangeon, Sarah Amelia Jaeggli, Thomas Widemann, Paolo Tanga

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Venus; Solar Transit; High-resolution transmission spectroscopy; Radiative transfer; Cross-correlation; Carbon dioxide; Carbon monoxide; Ozone; Venus-like exoplanets

Online: 11 July 2024 (08:37:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202208.0085.v2

The Inner and Backside Solar Flares

Ramy Mawad

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: The Sun; Solar Flare; Solar Core; Solar Interior layers; Radiative Zone; Convection Zone

Online: 5 August 2022 (14:59:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0152.v1

Self-Cleaning Solar Mirrors Coatings: From the Laboratory Scale to Prototype Field Tests

Anna Castaldo, Emilia Gambale, Giuseppe Vitiello, Giuseppe Cara

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: solar mirrors; self-cleaning; coatings; sputtering; AlN; prototype; test on field

Online: 2 July 2024 (02:57:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1323.v1

Impact of Temperature, Solar Irradiation and Wind Dust on the Production of Solar Energy and the Assessment of Water Quality Used for Cooling and Cleaning Photovoltaic Panels

Ali Ait Ali, Youssef Ouhassan, Mohcine Abouyaakoub, Mbarek CHAHBOUN, Hicham Hihi

Subject: Engineering, Energy And Fuel Technology Keywords: impact; temperature; quality analysis; dust; photovoltaic panels; groundwater; cooling

Online: 22 March 2024 (05:08:51 CET)

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Preprint ARTICLE | doi:10.20944/preprints202311.0499.v1

Detection of Solar Neutrons and Solar Neutron Decay Protons

Yasushi Muraki, Tatsumi Koi, Yutaka Matsubara, Satoshi Masuda, Pedro Miranda, Shoko Miyake, Tsuguya Naito, Ernesto Ortiz Fragoso, Akitoshi Oshima, Takashi Sako, Shoichi Shibata, Hisanori Takamaru, Munetoshi Tokumaru, Jose Franco Valdes-Galicia, Kyoko Watanabe

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar flare; impulsive flare; gradual flare; solar comic-rays; solar energetic particles; particle acceleration; solar neutrons

Online: 8 November 2023 (06:44:03 CET)

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Preprint ARTICLE | doi:10.20944/preprints202407.2435.v1

High‐Precision Defect Detection in Solar Cells Using YOLOv10 Deep Learning Model

Lotfi Aktouf, Yathin Shivanna, Mahmoud Dhimish

Subject: Engineering, Electrical And Electronic Engineering Keywords: YOLOv10; Object detection; Deep learning; Photovoltaic manufacturing

Online: 30 July 2024 (13:34:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0138.v1

Design and Optimization of Electrical Parameters of Perovskites-based Thin Film Solar Cell

Muhammad Muneeb Khan, Sadiq Ahmad, Ali Hassan, And Furqan Shaukat

Subject: Engineering, Energy And Fuel Technology Keywords: Electrical Parameters; Perovskite; Optimization; Renewable Power; SCAPS-1D; PVSyst; Solar Module; Solar Cell

Online: 2 April 2024 (09:25:09 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1604.v1

Numerical Estimation of Productivity for Single Slope Solar Stills in the Caspian Region

Dinmukhambet Baimbetov, Yelnar Yerdesh, Yelizaveta Karlina, Samal Syrlybekkyzy, Tanja Radu, Mohanraj Murugesan, Yerzhan Belyayev

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: Solar Still; Thermal Desalination; Caspian Region; Climatic Impact; Heat Balance Model.

Online: 20 September 2024 (09:08:24 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.0561.v1

Treatment with Ascorbyl Glucoside Arginine Complex Ameliorates Solar Lentigos

Mariko Takada, Kayoko Numano, Masahiko Nakano, Akio Yamamoto, Genji Imokawa

Subject: Medicine And Pharmacology, Dermatology Keywords: Ascorbyl Glucoside Arginine Complex; solar lentigo; double‐blind half‐face study; pigmentation; L value; melanin index

Online: 8 August 2024 (12:28:10 CEST)

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Preprint BRIEF REPORT | doi:10.20944/preprints202111.0054.v1

The Potential for Healthy Checkout Policies to Advance Nutrition Equity

Jennifer Falbe, Justin S White, Desiree M Sigala, Anna H. H Grummon, Sarah E Solar, Lisa M Powell

Subject: Biology And Life Sciences, Food Science And Technology Keywords: checkout; policy; product placement; obesity; nutrition; retail; marketing; disparities; race; income.

Online: 2 November 2021 (22:32:49 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.0608.v1

Performance of a Solar Driven Photocatalytic Membrane Reactor for Municipal Wastewater Treatment

Mirela Alina Constantin, Lucian Alexandru Constantin, Ioana Alexandra Ionescu, Cristina Mihaela Nicolescu, Marius Bumbac, Olga Tiron

Subject: Environmental And Earth Sciences, Water Science And Technology Keywords: PMR; solar light; wastewater; advanced treatment; photo catalysis; membrane processes

Online: 12 February 2024 (09:45:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1336.v1

Prospects and Obstacles Associated with Community Solar and Wind Farms in Jordan Suburban Areas

Ziad Hunaiti, Zayed Huneiti

Subject: Engineering, Electrical And Electronic Engineering Keywords: Community Solar and Wind Farms; Jordan; Suburban Areas

Online: 22 March 2024 (11:01:54 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1038.v1

Study on Effect of Partial Shading Irradiance Conditions in Photovoltaic Solar Arrays

Ioan-Viorel Banu, Fadila Barkat, Marcel Istrate, Josep M. Guerrero, George Culea, Petru Livinti, Roxana Grigore, Petru-Gabriel Puiu, Dragos-Alexandru Andrioaia, Sorin-Gabriel Vernica, Ioana Plescau

Subject: Engineering, Energy And Fuel Technology Keywords: photovoltaic (PV) arrays; solar power generation; partial shading; bypass diodes; simulation; modeling

Online: 19 February 2024 (10:28:19 CET)

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Preprint ARTICLE | doi:10.20944/preprints202105.0138.v1

Effects of Aerosols and Clouds on the Levels of Surface Solar Radiation and Solar Energy in Cyprus

Ilias Fountoulakis, Panagiotis Kosmopoulos, Kyriakoula Papachristopoulou, Panagiotis-Ioannis Raptis, Rodanthi-Elisavet Mamouri, Argyro Nisantzi, Antonis Gkikas, Jonas Witthuhn, Sebastian Bley, Anna Moustaka, Johannes Buehl, Patric Seifert, Diofantos G. Hadjimitsis, Charalampos Kontoes, and Stelios Kazadzis

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: solar energy; dust; aerosol; clouds; Cyprus

Online: 7 May 2021 (10:36:00 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.1007.v1

Development and Evaluation of a Solar Milk Pasteurizer for the Savanna Ecological Zone of West Africa

Iddrisu Ibrahim, Paul Tengey, Joseph Atia Ayariga, Junhuan Xu, Boakai K. Robertson, Olufemi S. Ajayi, James Owusu-Kwarteng

Subject: Biology And Life Sciences, Biology And Biotechnology Keywords: pasteurization; solar pasteurizer; milk treatment; coliform bacteria; pathogens

Online: 15 May 2024 (08:52:35 CEST)

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Solar pasteurization, as a means of treating milk in remote rural areas without electrical power, is based on using solar energy to thermally inactivate pathogenic microorganisms at temperatures below the boiling point to maintain or improve milk quality. A solar milk pasteurizer of flat‐plate water‐heating glass acting as the solar collector, connected to a stainless-steel cylindrical milk vat, was constructed and evaluated in Navrongo, in the tropical savanna zone of Ghana, West Africa. The novel approach taken in this project is to integrate the solar collection and heat exchanger into a single unit using materials and fabrication techniques readily available in the developing world. The vat comprises a 1.5 mm thick stainless steel cylindrical tank, a 2.2 cm wide hot water jacket, and an outer layer of 5.0 mm thick aluminium foil insulation. Hot water produced by the collector was used for pasteurizing milk. The optimum quantity of milk that this device could pasteurize under the study conditions was 8 L. The device could pasteurize raw milk to a maximum temperature of 74 °C at 14:00 h GMT. The ambient temperature during the pasteurization ranged from 30 °C to 43 °C. The microbial analysis before and after the pasteurization was done, and the result shows that the total bacteria count before pasteurization was 6.6x10⁶ log CFU/mL per unit volume, and the total bacteria count after pasteurization was 1.0x10² log CFU/mL. By acceptable standards, the total bacteria count after pasteurization is within a safe range for consumption, and coliform counts were negative. The solar milk pasteurization system is cost-effective. Hence, it is appropriate for milk producers in arid pastoral areas without electricity to adopt the solar pasteurizer as an alternative to firewood as a fuel source for milk pasteurization. This approach can potentially create a cottage industry that may also play a crucial role as a water treatment technology that will improve the health of rural populations.

Preprint ARTICLE | doi:10.20944/preprints202404.0221.v1

Solar Wind Charge-Exchange X-ray Emissions from the O⁵⁺ Ions in the Earth’s Magnetosheath

Zhicheng Zhang, Fei He, Xiao-Xin Zhang, Guiyun Liang, Xueyi Wang, Yong Wei

Subject: Environmental And Earth Sciences, Space And Planetary Science Keywords: solar wind charge-exchange (SWCX); earth magnetosheath; X-Ray spectrum; interplanetary shock; bow shock; Magnetopause

Online: 2 April 2024 (15:13:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.1292.v1

Non-thermal Solar-Wind Electron Velocity Distribution Function

Peter H. Yoon, Rodrigo A. López, Chadi S. Salem, John W. Bonnell, Sunjung Kim

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Kappa distribution; solar wind electrons; whistler-mode waves; turbulence; thermal fluctuations; electromagnetic; electrostatic; plasma; kinetic

Online: 22 February 2024 (09:51:26 CET)

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Preprint ARTICLE | doi:10.20944/preprints202405.0983.v1

Numerical and Experimental Determination of Selected Parameters of the Liquid Flat-Plate Solar Collector under Outdoor Conditions

Wiesław Zima, Łukasz Mika, Karol Sztekler

Subject: Engineering, Energy And Fuel Technology Keywords: liquid flat-plate solar collector; transient states; in-house mathematical model; in-house computer program; experimental verification; collector time constant; collector instantaneous efficiency

Online: 15 May 2024 (10:26:53 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0748.v1

Application of Machine Learning to Predict I-V Characteristics of PV Modules Based on Steady-State Solar Simulator

Rafał Porowski, Robert Kowalik, Tomasz Gorzelnik, Marta Styś-Maniara, Bartosz Szeląg, Diana Komendołowicz, Anita Białek, Agata Ludynia, Magdalena Piłat-Rożek, Ewa Łazuka, Erica Stanzani

Subject: Engineering, Energy And Fuel Technology Keywords: photovoltaics; current-voltage characteristics; solar energy; PV modules; machine learning; neural networks; statistical modeling

Online: 11 June 2024 (15:02:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0994.v1

Solar Energy Production Forecasting: A Comparative Study of Bi-LSTM, LSTM, XGBoost Models with Activation Function Analysis

Hamed Alizadegan, Arian Radmehr, Hossein Karimi, Mohsen Asghari Ilani

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Time series forecasting; LSTM; Bi-LSTM; Deep learning; ML; XGBoost; Energy; Solar Energy

Online: 15 May 2024 (10:22:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0208.v1

Periodic Behavior of Selected Solar, Geomagnetic and Cosmic Activity Indices during Solar Cycle 24

Ali Kilcik, Atila Ozguc, Jean-Pierre Rozelot

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Solar cycles; Solar flares; Geomagnetic activity indices; Cosmic rays; Period analysis

Online: 3 November 2023 (11:23:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints201610.0116.v2

Addressing on Mechanism of Different Types of ENSO and Related Teleconnections and Solar Influence

Indrani Roy

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: solar cyclic variability; Canonical and Modoki ENSO; Indian summer monsoon

Online: 26 September 2017 (04:13:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0122.v1

Landau Tidal Damping and Major-Body Clustering in Solar and Extrasolar Subsystems

Dimitris M. Christodoulou, Demosthenes Kazanas

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Dynamical evolution of planets and satellites; Extrasolar planets; Gravitation; Landau damping; Mean tidal field

Online: 2 April 2024 (09:18:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0013.v1

Surface Characterization of Nanostructured ITO Films of Oxygen Plasma Gas by Magnetron Sputtering for Dye-Sensitized Solar Cells Applications

Wittawat Poonthong, Narong Mungkung, Tanes Tanitteerapan, Threerapong Maneepen, Apidat Songruk, Anumut Siricharoenpanich, Somchai Arunrungrusmi, Nat Kasayapanand

Subject: Engineering, Energy And Fuel Technology Keywords: oxygen plasma; ITO films; sputtering method; DSSC devices

Online: 4 June 2024 (02:52:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0431.v1

Twenty-Year Climatology of Solar UV and PAR in Cyprus: Integrating Satellite Earth Observations with Radiative Transfer Modeling

Konstantinos Fragkos, Ilias Fountoulakis, Georgia Charalampous, Kyriakoula Papachristopoulou, Argyro Nisantzi, Diofantos Gl. Hadjimitsis, Stelios Kazadzis

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Ultraviolet Radiation; Erythema; UV-Index; Photosynthetically Active Radiation

Online: 5 April 2024 (10:44:07 CEST)

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In this study, we present comprehensive climatologies of effective ultraviolet (UV) quantities and photosynthetically active radiation (PAR) over Cyprus for the period 2004 to 2023, leveraging the synergy of earth observation (EO) data and radiative transfer model simulations. The EO dataset, encompassing satellite and re-analysis data for aerosols, total ozone column, and water vapor, alongside cloud modification factors, to capture the nuanced dynamics of Cyprus's atmospheric conditions. With a temporal resolution of 15 minutes and a spatial of 0.05°x0.05°, these climatologies undergo rigorous validation against established satellite datasets and are further evaluated through comparisons with ground-based global horizontal irradiance measurements provided by the Meteorological Office of Cyprus. This dual-method validation approach not only underscores the models' accuracy but also highlights their proficiency in capturing intra-daily cloud coverage variations. Our analysis extends to investigating the long-term trends of these solar radiation quantities, examining their interplay with changes in cloud attenuation, aerosol optical depth (AOD), and total ozone column (TOC). Significant decreasing trends in the noon ultraviolet index (UVI), of -2 to -4% per decade have been found in Autumn, especially marked on the island’s Northeastern part, mainly originating from the (significant) positive trends in TOC. The significant decreasing trends in TOC, of -2 to -3% per decade that were found in Spring do not result in correspondingly significant positive trends in the noon UVI since variations in cloudiness and aerosols also have a strong impact on the UVI in this season. The seasonal trends in the Daylight Integral (DLI) were generally not significant. These insights provide a valuable foundation for further studies aimed at developing public health strategies and enhancing agricultural productivity, highlighting the critical importance of accurate and high-resolution climatological data.

Preprint REVIEW | doi:10.20944/preprints202409.0755.v1

Luminescent Materials for Dye-sensitized Solar Cells: Advances and Directions

Emeka Harrison Onah, Ndanduleni Lethole, Patrick Mukumba

Subject: Physical Sciences, Applied Physics Keywords: luminescent materials; dye-sensitized solar cells; down conversion; up conversion; quantum dots

Online: 10 September 2024 (10:09:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202105.0488.v9

The Solar System: Nature and Mechanics

Mario Ljubičić

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar system; complete relativity; nature; mechanics

Online: 19 July 2023 (09:29:20 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0524.v1

Optimization of Lead-Free Sn-Based Perovskite Solar Cells using SCAPs-1D Simulation Techniques

Awais Maqsood, Muhammad Irfan Abid, Muhammad Kamran, Marek Turzyński, Mehdi Tlija, Ehab Ghith

Subject: Engineering, Electrical And Electronic Engineering Keywords: Perovskite solar cells; Lead-free; Tin-based; SCAPs-1D Simulation and Performance optimization

Online: 11 June 2024 (08:33:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201910.0003.v1

A Comparison of Solar Photovoltaic and Solar Thermal Collector for Residential Water Heating and Space Heating System

Md. Habibur Rahaman, M. Tariq Iqbal

Subject: Engineering, Energy And Fuel Technology Keywords: solar photovoltaic; thermal collector; water heating; space heating; performance; cost analysis

Online: 1 October 2019 (02:52:43 CEST)

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Preprint REVIEW | doi:10.20944/preprints202408.1025.v1

Solar Energy Resource and Power Generation in Morocco: Current Situation, Potentials and Future Perspective

Rania Benbba, Majd Barhdadi, Antonio Ficarella, Giovanni Manente, Maria Pia Romano, Nizar El Hachemi, Abdelfettah Barhdadi, Ahmed Al-Salaymeh, Abdelkader Outzourhit

Subject: Engineering, Energy And Fuel Technology Keywords: Solar Energy; Photovoltaic; CSP; solar thermal; Morocco; Renewable Energy; sustainable development; strategic investment

Online: 14 August 2024 (16:51:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.1201.v1

Effects of Ti3C2Tx MXene Addition to a Co Complex/Ionic Liquid-Based Electrolyte on the Photovoltaic Performance of Solar Cells

Ju Hee Gu, Dongho Park, Kyung-Hye Jung, Byung-Chul Lee, Yoon Soo Han

Subject: Chemistry And Materials Science, Electrochemistry Keywords: dye-sensitized solar cell; redox mediator; Ti3C2Tx MXene; hole conduction

Online: 21 February 2024 (07:20:10 CET)

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Preprint REVIEW | doi:10.20944/preprints202406.0128.v1

Solar Radiation Forecasting — State of Art and Methodological Discussion

Ewa Chodakowska, Joanicjusz Nazarko, Łukasz Nazarko, Hesham S. Rabayah

Subject: Engineering, Energy And Fuel Technology Keywords: forecasting; solar; energy; irradiance; photovoltaic; state of the art; systematic literature review (SLR); meta-review; overviews of review; bibliometric; classification; method

Online: 4 June 2024 (08:22:31 CEST)

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Effective solar forecasting has become a critical topic in the scholarly literature in recent years due to the rapid growth of photovoltaic energy production worldwide and the inherent variability of this source of energy. Due to the technological and econonomic limitations of energy storage solutions, using other, mosty conventional, sources to cover energy shortfalls and at the same time utilising solar surpluses production becomes necessary. The need to optimize energy systems, ensuring power continuity, and balancing energy supply and demand has led to the development of various forecasting methods and approaches based on meteorological data or photovoltaic plant characteristics. This article presents the results of a meta-review of the solar forecasting literature, including the current state of knowledge and methodological discussion. It presents a comprehensive set of forecasting methods, evaluates current classifications, and proposes a new synthetic typology. The article emphasizes the increasing role of artificial intelligence (AI) and machine learning (ML) techniques in improving forecast accuracy, alongside traditional statistical and physical models. It explores the challenges of hybrid and ensemble models, which combine multiple forecasting approaches to enhance performance. The paper addresses the emerging trends in solar forecasting research, such as the integration of big data and advanced computational tools. Additionally, from a methodological perspective, the article outlines a rigorous approach to the meta-review research procedure, addresses the scientific challenges associated with conducting bibliometric research, and highlights best practices and principles. This includes defining research questions, selecting eligibility criteria, literature search, data extraction, synthesis, and assessing bias and quality. The article contributes to the solar forecasting field by providing up-to-date knowledge, along with insights on the emerging trends, future research directions, and anticipating implications for the theory and practicce.

Preprint ARTICLE | doi:10.20944/preprints202408.1462.v1

Efficiency Improvement on Indium Tin Oxide Films for Dye-sensitized Solar Cell using Oxygen Plasma by Bias-magnetron RF Sputtering Process

Wittawat Poonthong, Narong Mungkung, Tanes Tanitteerapan, Threerapong Maneepen, Apidat Songruk, Khanchai Tunlasakun, Anumut Siricharoenpanich, Somchai Arunrungrusmi, Nat Kasayapanand

Subject: Chemistry And Materials Science, Nanotechnology Keywords: ITO-nanorod; oxygen plasma; RF sputtering; DC-self bias; DSSCs

Online: 20 August 2024 (11:59:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.2086.v1

Unique Features of Extremely Halophilic Microbiota Inhabiting Solar Saltwork Fields of Vietnam

Violetta La Cono, Gina La Spada, Francesco Smedile, Francesca Crisafi, Laura Marturano, Alfonso Modica, Huynh Hoang Nhu Khanh, Pham Duc Thinh, Cao Thi Thuy Hang, Elena A. Selivanova, Ninh Khắc Bản, Michail M. Yakimov

Subject: Environmental And Earth Sciences, Environmental Science Keywords: extreme halophiles; solar saltern; microbiota; CPR bacteria; DPANN archaea

Online: 28 August 2024 (14:44:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.1980.v1

Optimizing the Indium Tin Oxide Layer Characteristics toward a Low-Cost Dust-Cleaning Process for Solar Panels

Salman Alfihed, Reema Abdulaziz Altuwaijri, Sara Ahmed Alsalman, Adnan Zaman, Shaeen Kalathil

Subject: Engineering, Other Keywords: ITO annealing; dust mitigation; surface modification; ITO resistivity; ITO refractive index

Online: 25 July 2024 (11:53:32 CEST)

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Preprint CASE REPORT | doi:10.20944/preprints202409.0620.v1

Design and Development of a Low-Cost Parabolic Type Solar Dryer and Its Performance Evaluation in Drying of King Fish – Case Study in Oman

Talal Al Haddabi1, Amuthakkannan Rajakannu

Subject: Engineering, Energy And Fuel Technology Keywords: Solar Energy; Parabolic Solar trough; Solar dryer; evacuated copper tube absorber; Specific heat

Online: 9 September 2024 (08:43:09 CEST)

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Dry Fish is a rich source of proteins and nutrients and can be eaten in many forms. Oman is one of the important fish producers in the world and having high demand in neighboring countries for Oman’s fish. Fishery sector is considered as one of the important economic development sector in sultanate of Oman. In the fishery sector, use of technology is not up to the mark because of less awareness of technology application among Omani fishermen. Also, there is a demand for a greater number of cold storages in different regions to store fresh fishes which is not materialized yet. Similarly, there is a demand of perfect and cheap technology in Oman to dry fishes to improve the profit to the fishermen. Solar energy is abundantly available in Oman and there are high possibilities in Oman to use solar energy in domestic and industrial applications. Since the sunlight is available throughout the year, it is possible to convert in to thermal energy or electrical energy. Electricity can be produced from photovoltaic principle (PV) or indirectly with concentrated solar power. Similarly, we can use solar concentrators for many thermal applications. The solar dryer is a device which is used to dry fruits, vegetables, leaves, clothes etc. If any of the items are dried with the help of solar energy, then we can save lot of non-renewable source of energy and can help to improve economy of the country. The sun can, at least seasonally at Oman’s latitudes, provide a substantial part of the energy needed for various applications. In this work, we used solar dryer to make dry fish with high quality. Use of parabolic type concentrator to dry the fish is an effective solution which is an innovative idea to the fishermen. The temperature variation in dryer is directly proportional to the intensity of solar. The tracking mechanism is a combination of electronic and mechanical design which tracks the sun automatically. In this work, a parabolic concentrator with automatic tracking mechanism was designed and the performance analysis have been done. In the design, copper tubes are used for heat transfer and then the hot fluid is circulated in the box which is used to dry the fishes. As per the experiment, fish drying efficiency obtained from solar dryer is 77.9% and it took 3 days to dry king fish of 20kg. There are many advantages in parabolic type solar concentrators relate to the quality of dryness in the fishes and time taken to dry the fishes which are elaborately discussed in this paper. This solar dryer technology will improve green environment and also will save non-renewable sources of sultanate of Oman for longer period of time.

Preprint ARTICLE | doi:10.20944/preprints202407.0892.v1

Optimizing Geometry and ETL Materials for High-Performance Inverted Perovskite Solar Cells by TCAD Simulation

Irodakhon Gulomova, Oussama Accouche, Rayimjon Aliev, Zaher Al Barakeh, Valikhon Abduazimov

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: perovskite; inverted structure; thickness; metal oxides; photoelectric parameters.

Online: 11 July 2024 (05:12:14 CEST)

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Preprint REVIEW | doi:10.20944/preprints202010.0438.v1

Nanostructures GaAs Solar Cells

Mohammad Nur E Alam, Narottam Das

Subject: Chemistry And Materials Science, Biomaterials Keywords: conversion efficiency; GaAs substrate; light absorption; nano-grating structures; reflection loss; simulation; solar cells

Online: 21 October 2020 (13:28:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202012.0259.v1

Nanofluids for Solar Thermal Collection and Energy Conversion

Mohammed Abdullah Hussain, Sumith Yesudasan, Sibi Chacko

Subject: Engineering, Automotive Engineering Keywords: Solar Flat Plate Collector; Efficiency; Nanofluid; Surfactant; Al2O3-Water; Ultrasonic agitation

Online: 10 December 2020 (12:58:10 CET)

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Preprint ARTICLE | doi:10.20944/preprints201904.0121.v1

Astrometric Solar-System Anomalies and Evolutionary Physical Constants

Rajendra P. Gupta

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: pioneer anomaly; AU anomaly; astronomical unit; varying physical constant; VSL; LLR; moon eccentricity

Online: 10 April 2019 (08:38:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201812.0091.v1

Solar Power Interpolation and Analysis Using Spatial Autocorrelation

Syed Muhammad Ahsan Gillani

Subject: Engineering, Energy And Fuel Technology Keywords: solar power interpolation; solar power attenuation; spatial autocorrelation; semi-variograms; geosatistics

Online: 7 December 2018 (03:55:55 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.0515.v1

Study of Physical Properties of Copper Oxide Thin Films Prepared by Spin Coating for Hole Transport Applications in Perovskite Solar Cells

Muhammad Abbas, Muhammad Imran, Muhammad Haseeb-u-Rehman, Ghulam Hasnain Tariq

Subject: Physical Sciences, Applied Physics Keywords: CuO thin films; spin coating; hole transport; optical properties; p-type conductivity

Online: 7 August 2024 (14:16:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201705.0085.v1

ITO-Free Transparent Organic Solar Cell with Distributed Bragg Reflector for Solar Harvesting Windows

Yuelin Peng, Lushuai Zhang, Nongyi Cheng, Trisha L. Andrew

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: transparent electrode; organic photovoltaic; distributed Bragg reflector

Online: 9 May 2017 (11:09:37 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.1306.v1

Validation of a 3D Local-Scale Adaptive Solar Radiation Model by Using Pyranometer Measurements and High-Resolution DEM

Eduardo Rodríguez, Judit García-Ferrero, Maria Sanchez-Aparicio, José Manuel Iglesias, Albert Oliver-Serra, María Jesus Santos Sánchez, Paula Andres-Anaya, José Manuel Cascón, GUSTAVO MONTERO, Alejandro Medina, Susana Lagüela, M.Isabel Asensio, Rafael Montenegro

Subject: Computer Science And Mathematics, Applied Mathematics Keywords: Solar radiation; Complex orography; Shadow calculation; LiDAR data; High-resolution DEM; Adaptive mesh; Pyranometer measurement

Online: 4 March 2024 (07:09:50 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.0783.v1

Asymmetries in Strong Solar Flares

Eugene Bagashov

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Sun: activity; Sun: flares; Sun: X-rays; gamma-rays

Online: 12 June 2023 (07:20:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202008.0162.v2

Efficiency of Selective Solar Absorber in High Vacuum Flat Solar Thermal Panels: The Role of Emissivity

Davide De Maio, Carmine D'Alessandro, Antonio Caldarelli, Marilena Musto, Daniela De Luca, Emiliano Di Gennaro, Roberto Russo

Subject: Engineering, Energy And Fuel Technology Keywords: thermal emittance; conversion efficiency; selective solar absorber; thermal energy; evacuated flat panel; solar energy

Online: 20 October 2020 (12:18:01 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202310.2071.v1

Towards Optimal Solar Energy Integration: A Deep Dive into AI-Enhanced Solar Irradiance Forecasting Models

Muhammad Farhan Hanif, Sabir Naveed, Jicang Si, Xiangtao Liu, Jianchun Mi

Subject: Engineering, Energy And Fuel Technology Keywords: artificial neural network (ANN); Support Vector Machine (SVM); Support Vector Regression (SVR); Lightweight Gradient Boosting Machines (Light GBM); Machine Learning; Solar Irradiance (SI); solar forecasting

Online: 31 October 2023 (12:30:45 CET)

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Preprint ARTICLE | doi:10.20944/preprints201808.0363.v1

Quality Control of Solar Radiation Data within the South African Weather Service Solar Radiometric Network

Lucky Ntsangwane, Venkataraman Sivakumar, Brighton Mabasa, Nosipho Zwane, Katlego Ncongwane, Joel Botai

Subject: Physical Sciences, Applied Physics Keywords: quality control; BSRN; solar radiation; satellite-retrieve irradiance; ground stations; validation

Online: 21 August 2018 (04:23:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0701.v2

French Cancer Incidence and Mortality from 2007 to 2016 in Terms of Solar UVB and Obesity: An Ecological Study

William B. Grant, Pierrick Martinez

Subject: Public Health And Healthcare, Health Policy And Services Keywords: cancer; diet; ecological study; incidence rate; mortality rate; obesity; risk; solar UVB; smoking; vitamin D

Online: 26 August 2024 (08:28:14 CEST)

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Background: Many risk-modifying factors affect cancer incidence and mortality rates. Solar UVB reduces cancer risk by producing vitamin D, which has many mechanisms to reduce risk of cancer incidence, progression, and metastasis. Obesity increases cancer risk through several mechanisms, including increased inflammation. Method and Materials. We present an ecological study (a type of observational study) of incidence and/or mortality rates for cancers during 2007–2016 of 17 anatomical sites with respect to solar ultraviolet-B (UVB) doses and obesity prevalence. Data were averaged for 12 geographical regions. Results: Solar UVB doses were significantly inversely correlated with incidence rates for three types of cancer for males. They were inversely correlated with mortality rates for five cancers for males and four for females. Obesity prevalence was directly correlated with mortality rates for three cancers for males and seven for females. Discussion: The ecological approach has certain limitations, such as its sensitivity only to regional variations in relation to specific risk-modifying factors. In this study, these limitations include numerous factors influencing cancer risk and the fact that the data are averaged across entire regional populations, which may not reflect individual risks. Despite this, the study reveals important correlations. Specifically, it found that solar UVB exposure is linked to a lower risk of certain cancers, while obesity is associated with an increased risk of some cancers in France. These findings are consistent with results from a similar study in the United States on cancer rates between 2016 and 2020. The association between obesity and cancer risk aligns with other observational studies. However, it is uncertain to what extent higher solar UVB exposure or elevated serum 25-hydroxyvitamin D levels might mitigate the impact of obesity on cancer risk. Reducing cancer mortality in France may be achievable through vitamin D supplementation and efforts to lower obesity prevalence.

Preprint ARTICLE | doi:10.20944/preprints202407.1271.v1

Surface Development of PET Films Using Low-Pressure, High-Frequency Ar + O2 Plasma on Zinc Powder for Dye-Sensitized Solar Cells

Poonthong Wittawat, Nat Kasayapanand, Narong Mungkung, Khanchai Tunlasakun, Somchai Arunrungrusmi, Nuttee Thungsuk, Tanes Tanitteerapan, Toshifumi Yuji, Threerapong Maneepen, Apidat Songruk

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: PET films; Zinc powder; Ar+O2 plasma; RF power; LPCVD; DSSCs

Online: 16 July 2024 (07:34:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201707.0013.v1

Interannual Variability and Seasonal Predictability of Wind and Solar Resources

Nir Y. Krakauer, Daniel S. Cohan

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: renewable energy; solar; wind; interannual variability; seasonal forecasting; teleconnections

Online: 7 July 2017 (03:55:54 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0176.v1

Optimal Electrification Using Renewable Energies: Microgrid Installation Model with Combined Mixture k-Means Clustering Algorithm, Mixed Integer Linear Programming and Onsset Method

Kabe Moyème, Bokovi Yao, Kwami Senam Sedzro, Takouda Pidéname, Lare Yendoubé

Subject: Engineering, Electrical And Electronic Engineering Keywords: microgrids; optimization; k-means clustering; mixed integer linear programming; onsset

Online: 3 May 2024 (07:54:16 CEST)

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Optimal planning and design of microgrids is a priority for electrification of off-grid areas. Indeed, according to one of the Sustainable Development Goals (SDG) 7, the UN recommends universal access to electricity for all but, at the lowest cost. To achieve this goal, several optimization methods with different strategies have been proposed in the literature. This paper proposes a microgrid installation and planning model based on a combination of several techniques. Python 3.10, the programming language, has been used in conjunction with machine learning techniques such as unsupervised learning based on K-means clustering and deterministic optimization methods based on mixed linear programming. These methods were complemented by the open-source spatial method for optimal electrification planning: onsset. The results obtained enabled us to simulate the model obtained, with a cluster considered as a case study, based on the elbow and k-means clustering method; then, in a second phase, to size the microgrid with a capacity of 40 kW, by optimizing all the resources available on the site: the example of the various resources in the case of Togo was considered (solar, wind, hydropower). This study therefore highlighted the optimal resources obtained by integrating battery systems by the optimization model formulated on the basis of the various technology costs, such as investment, maintenance and operating costs, based on the technical limits of the various technologies. For the optimum results obtained, solar systems account for 80% of the maximum load considered, compared with 7.5% for wind systems and 12.5% for battery systems. Next, an optimal microgrid connection model was proposed, based on the constraints of a voltage stability limit estimated at 10% of the maximum voltage drop. The substation capacity limit was also taken into account. The results obtained from the case studied enabled us again, to present selective results for load nodes in relation to the substation node. And finally, the spatial technology planning tool made it possible to obtain results on the different strategies for the various technologies required for the electrification planning study of the Togo case. The various results obtained from the different techniques provide the leads needed for a feasibility study for optimal electrification of off-grid areas, using microgrid systems.

Preprint ARTICLE | doi:10.20944/preprints202401.0302.v1

Radio Emission and Observations from the Solar Transition Region

Baolin Tan, Jing Huang, Yin Zhang, Yuanyong Deng, Linjie Chen, Fei Liu, Jin Fan

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar transition region; radio emission; magnetic field; gradient

Online: 4 January 2024 (03:11:59 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.0912.v1

Optimization and Efficiency Enhancement of Modified Polymer Solar Cells

Muhammad Raheel Khan, Bożena Jarząbek

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: Polymer thin films; BHJ organic solar cells; Hole transport layer (HTL); Electron transport layer (ETL); Reflection coating; SCAPS-1D simulation

Online: 11 August 2023 (09:41:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1858.v2

Thermospheric Density Response to the Solar Activity and QBO

Bo Li, Ruifei Cui, Libin Weng, Jianfang Fei

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: thermospheric density; GAMDM; QBO; solar activity

Online: 31 July 2023 (11:23:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201812.0011.v1

Solar and Atmospheric Neutrino Mass Splitting with SMASH Model

Chitta Ranjan Das, Katri Huitu, Timo Kärkkäinen

Subject: Physical Sciences, Particle And Field Physics Keywords: neutrino mass; Planck neutrino mass limit; Higgs metastability; SMASH model

Online: 3 December 2018 (08:09:38 CET)

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Preprint ARTICLE | doi:10.20944/preprints201810.0593.v1

Intra-Hour Forecasts of Solar Power and Ramp Events ^†

Mohamed Abuella, Badrul Chowdhury

Subject: Engineering, Electrical And Electronic Engineering Keywords: adjusting; classification; ensemble; post-processing; ramp events; solar power forecast

Online: 25 October 2018 (05:43:31 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1325.v1

Performance Analysis of a 50 MW Solar PV Installation at BUI Power Authority: A Comparative Study Between Sunny and Overcast Days

Rahimat Oyiza Yakubu, Muzan Williams Ijeoma, Hammed Yusuf, Abdulazeez Alhaji Abdulazeez, Peter Acheampong, Michael Carbajales-Dale

Subject: Engineering, Energy And Fuel Technology Keywords: Solar PV System; Solar Radiation; AC Energy Output; Performance Ratio; System Yield; Capacity Factor; Solar PV Performance Analysis

Online: 19 June 2024 (08:09:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202305.0488.v1

The Solar Energy Potential of Greece for Flat-Plate Solar Panels Fixed on Dual-Axis Systems

Harry D. Kambezidis, Konstantinos Mimidis, Kosmas A. Kavadias

Subject: Environmental And Earth Sciences, Environmental Science Keywords: solar energy potential; maximum energy; inclined surfaces; solar tracking; Greece

Online: 8 May 2023 (09:08:20 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202005.0415.v1

Standalone Solar-Powered Ultraviolet Mobile Disinfectant: Bringing Solar Energy in the Global Fight against COVID-19

Nassim Ahmed Mahammedi, Adel Mahammedi

Subject: Engineering, Energy And Fuel Technology Keywords: solar energy; photovoltaics; UVGI; UVC; COVID-19; coronavirus; SARS-CoV-2

Online: 25 May 2020 (17:59:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1064.v1

Numerical Investigation on a Solar Heating System with Solar Tower Receiver and Seasonal Storage in North China: Dynamic Performance Assessment and Operation Strategies Analysis

Xiaoxia Li, Husheng Qiu, Zhifeng Wang, Jinping Li, Guobin Yuan, Xiao Guo, Longfei Chen

Subject: Engineering, Energy And Fuel Technology Keywords: solar heating system; dynamic performance; seasonal thermal storage; underground water pit seasonal storage; operation strategies

Online: 17 July 2023 (10:38:12 CEST)

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Preprint REVIEW | doi:10.20944/preprints202310.1865.v1

A Review on Transparent Solar Panels

Rishi Rajesh Mutagekar, Sakshi Anil Kachare, Pratham Satish Babre, Gunjan Dilip Bhirud, Himanshu Nagraj Pendor, Avanti Vasant Shinde

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: transparent solar panels; renewable energy; OPV; DSSC; Perovskite Solar Cells; Thin-Film Silicon; building-integrated photovoltaics; production costs; integration hurdles.

Online: 30 October 2023 (10:11:34 CET)

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Preprint DATA DESCRIPTOR | doi:10.20944/preprints201811.0120.v2

SolarView: Georgia Solar Adoption in Context

Jacqueline Hettel Tidwell, Abraham Tidwell, Steffan Nelson, Marcus Hill

Subject: Engineering, Energy And Fuel Technology Keywords: solar; technology adoption; demographics; mixed methods

Online: 30 November 2018 (15:47:46 CET)

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Preprint REVIEW | doi:10.20944/preprints201710.0027.v2

Concentrating Solar Power Tower: Latest Status Report and Survey of Development Trends

Albert Boretti, Stefania Castelletto, Sarim Al-Zubaidy

Subject: Engineering, Energy And Fuel Technology Keywords: renewable energy; concentrated solar power; solar tower; parabolic trough; natural gas boost; thermal energy storage; molten salt; steam; Rankine cycles

Online: 17 November 2017 (03:56:36 CET)

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Preprint REVIEW | doi:10.20944/preprints202405.0620.v1

A Review of Factors Affecting the Lighting Performance of Light Shelves and Controlling Solar Heat Gain

Shadan Masoud, Zahra Zamani, Seyed Morteza Hosseini, Shady Attia

Subject: Engineering, Architecture, Building And Construction Keywords: lightshelf; daylighting; solar heat gain; energy use; buildings

Online: 9 May 2024 (16:52:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0706.v1

Solar Business in an Oil-Rich Country? A Socio-technical Investigation of Solar PV Businesses in Iran

Leila Aghlimoghadam

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: solar business; solar PV; social acceptance; energy transition; oil-rich country; Iran

Online: 21 April 2023 (09:49:31 CEST)

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Taking a socio-technical perspective, I focus on solar businesses (niche market actors) in Iran. As one of the key stakeholder groups whose business prosperity is tied to the development of solar PV, they play a crucial role in accelerating the energy transition. Given the incumbent fossil-based electricity sector in Iran and the least enabling policies, I am first interested to find (i) the main drivers and barriers of solar businesses; and (ii) the roles these solar businesses play in bringing solar PV deployment forward in Iran. I collected the data via 20 semi-structured interviews with solar businesses in Golestan, Guilan, Tehran, Khorasan Razavi, and Eastern Azerbaijan Provinces in Iran. Taking an inductive approach, I considered sustainability transition and social acceptance theories as sensitising concepts to investigate common and specific points of solar business acceptance in Iran. I find ecological awareness, belief in intergenerational justice, and willingness to innovate, as the main intrinsic drivers and socioeconomic opportunity and tackling the energy imbalance as extrinsic drivers; while the lack of a common vision with the energy governors, and the low knowledge of solar PV among the customers, escalating prices, and challenges to accessing good quality solar equipment are the most prior obstacles. Moreover, I understand educating people, driving the innovative deployment of solar PV, and facilitating the diffusion of it, as the major roles of solar businesses in Iran. I find that the sustainability transition literature overlooked the key role of solar businesses specially in fossil-based and developing economies. My findings suggest that the positive intrinsic mechanisms among the solar businesses, in combination with better-enabling policy frameworks and external factors, like lifting the sanctions and joining the global energy market, climate change mitigation commitments and standards, can help solar businesspeople to lead and accelerate solar PV development in Iran.

Preprint ARTICLE | doi:10.20944/preprints202404.1418.v2

Cancer Incidence Rates in the US in 2016–2020 with Respect to Solar UVB Doses, Diabetes and Obesity Prevalence, Lung Cancer Incidence Rates, and Alcohol Consumption: An Ecological Study

William B. Grant

Subject: Public Health And Healthcare, Other Keywords: alcohol consumption; cancer incidence; diabetes mellitus; diet; ecological study; lung cancer; obesity; solar UVB, USA; vitamin D

Online: 7 May 2024 (11:57:17 CEST)

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Abstract: This article reports the results of an ecological study of cancer incidence rates by state in the US for the period 2016-2020. The goals of this study were to determine the extent to which solar UVB doses still reduced cancer risk compared to findings reported in 2006 for cancer mortality rates for the periods 1950–1969 and 1970-1794 as well as cancer incidence rates for the period 1998–2002 and to determine which factors were recently associated with cancer risk. The cancer data for non-Hispanic white (European American) men and women were obtained from the Centers for Disease Control and Prevention. Indices were obtained for solar UVB at the surface for July 1992, and alcohol consumption, and diabetes and obesity prevalence near the 2016–2020 period. Lung cancer incidence rates were also used in the analyses as a surrogate for smoking, diet, and air pollution. The cancers for which solar UVB is significantly associated with reduced incidence are bladder, brain (males), breast, corpus uteri, esophageal, gastric, non-Hodgkin’s lymphoma, pancreatic, and renal cancer. Lung cancer was significantly associated with colorectal, laryngeal, and renal cancer. Diabetes was also significantly associated with breast, liver, and lung cancer. Obesity prevalence was significantly associated with breast, colorectal and renal cancer. Alcohol consumption was associated with bladder and esophageal cancer. Thus diet has become a very important driver of cancer incidence rates. The role of solar UVB in reducing risk of cancer has been reduced due to people spending less time outdoors, wearing sunscreen that blocks UVB but not UVA radiation, and population increases in overweight and obesity, which lowers 25-hydroxyvitamin D concentrations and generates systemic inflammation, a risk factor for cancer. The dietary approach that would reduce the risk of diabetes, obesity, lung cancer, and, therefore cancer, would be one based mostly on whole-plants and restrictions on red and processed meats and ultraprocessed foods. Solar UVB exposure for a few minutes before applying sunscreen and taking vitamin D supplements would also help reduce risk of cancer.Keywords: alcohol consumption; cancer incidence;

Preprint ARTICLE | doi:10.20944/preprints202408.0002.v1

Advanced Perovskite-Silicon Tandem Solar Cells: Enhancing Efficiency and Stability

Chris Bell, Ayoolu Olukemi, Abram Gracias

Subject: Engineering, Other Keywords: Perovskite-Silicon Tandem Solar Cells; Efficiency; Stability

Online: 1 August 2024 (11:56:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0148.v1

Life Cycle Assessments in Renewable Energy: Solar and Wind Perspectives

Francisco Portillo, Alfredo Alcayde, Rosa Maria Garcia, Manuel Fernandez-Ros, Jose Antonio Gazquez, Nuria Novas.

Subject: Environmental And Earth Sciences, Sustainable Science And Technology Keywords: Life Cycle Assessment; renewable energy; solar energy; wind energy; environmental impact; material assessment

Online: 3 May 2024 (11:22:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202402.0154.v1

Solar Energy: Revolutionizing Shipping Industry Towards Sustainability and Environmental Stewardship

Olga Petrychenko, Maksym Levinskyi, Sergey Goolak, Vaidas Lukoševičius

Subject: Engineering, Marine Engineering Keywords: solar energy; sustainable energy; green energy; on-renewable energy sources; environmentally friendly future

Online: 2 February 2024 (10:27:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202002.0369.v1

Performance Results of a Solar Adsorption Cooling and Heating Unit

Tryfonas Roumpedakis, Salvatore Vasta, Alessio Sapienza, George Kallis, Sotirios Karellas, Ursula Wittstadt, Mirko Tanne, Niels Harborth, Uwe Sonnenfeld

Subject: Engineering, Energy And Fuel Technology Keywords: Solar Cooling; Adsorption; Evacuated tube collectors; Experimental testing

Online: 25 February 2020 (11:12:51 CET)

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Preprint REVIEW | doi:10.20944/preprints201811.0625.v1

Encapsulation of Organic and Perovskite Solar Cells: A Comprehensive Review

Ashraf Uddin, Mushfika Baishakhi Upama, Haimang Yi, Leiping Duan

Subject: Physical Sciences, Chemical Physics Keywords: organic solar cells; perovskite solar cells; encapsulation; stability

Online: 30 November 2018 (09:38:24 CET)

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Preprint ARTICLE | doi:10.20944/preprints202406.2037.v1

Research on Multi-Step Fruit Color Prediction Model of Tomato in Solar Greenhouse Based on Time Series Data

Shufeng Liu, Yanping Zhao, Tianhua Li, Linlu Zu, Siyuan Chang

Subject: Engineering, Electrical And Electronic Engineering Keywords: ; solar greenhouse; internet of things; tomato growth model; deep learning; multi-step space-time prediction ;

Online: 1 July 2024 (04:02:41 CEST)

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Color change is the most obvious characteristic of tomato ripening stage and an important indicator of tomato ripening condition, which directly affects the commodity value of tomato. To visualize the color change of tomato fruit in mature stage, a gated recurrent unit network with an encoder-decoder structure that dynamically simulates tomato growth and development with time-dependent lines using tomato color and shape as real-time data was proposed in this paper. Firstly, the .json file was converted into a mask.png file, the tomato mask was extracted, and the tomato was separated from the complex background environment, and the tomato growth and development data set was successfully constructed. Then, a network of gated recurrent units with encoder-decoder structure was constructed to predict the future growth trend of tomato under different greenhouse temperatures. The experimental results showed that for the gated recurrent unit network of encoder-decoder structure proposed, when the hidden layer number was 1 and hidden layer number was 512, a high consistency and similarity between the model predicted image sequence and the actual growth and development image sequence would be realized, and the structural similarity index measure was 0.746. It was proved that when the average temperature was 24.93℃, the average soil temperature was 24.06℃, and the average light intensity was 11.26 Klux, the environment was the most suitable for tomato growth. The environmental data-driven tomato growth model was constructed to explore the growth status of tomato under different environmental conditions, thus to understand the growth status of tomato in time. The statement provided a theoretical foundation for determining the optimal greenhouse environmental conditions to achieve tomato maturity. And it offered recommendations for investigating the growth cycle of tomatoes, as well as technical assistance for standardized cultivation in solar greenhouses.

Preprint CASE REPORT | doi:10.20944/preprints202407.1971.v1

Solar Energy Data Analysis & Predictive Modeling: A Case Study on Open Data of Saudi Arabian Solar Energy

Mohommad Ali Bandusab Kadampur

Subject: Computer Science And Mathematics, Artificial Intelligence And Machine Learning Keywords: Solar Energy; Predictive Modeling; Meteorological Variables; Machine Learning; RandomForestRegressor and XGBoosting; Power BI; Global Horizontal Irradiance; Saudi Arabia

Online: 25 July 2024 (10:19:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202302.0486.v1

MHD Simulation in the Solar Corona to Obtain Conditions for the Acceleration of Cosmic Rays during Solar Flares

Alexander Podgorny, Igor Podgorny, Alexei Borisenko

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: solar flare; solar cosmic rays; current sheet; magnetohydrodynamic simulation; active region

Online: 28 February 2023 (02:23:20 CET)

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Preprint ARTICLE | doi:10.20944/preprints201703.0129.v1

Process Heat Generation Potential from Solar Concentration Technologies in Latin America: The Case of Argentina

Isidoro Lillo, Elena Pérez, Sara Moreno, Manuel Silva

Subject: Engineering, Energy And Fuel Technology Keywords: feasibility; solar thermal energy; heat process; greenhouse gas emissions

Online: 17 March 2017 (04:05:07 CET)

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Preprint ARTICLE | doi:10.20944/preprints202405.1142.v1

New Flexible Electrospun PET/TiO2 Composite Photoanode Layer for Dye-Sensitized Solar Cells, DSSCs, and Its Photovoltaic Performances

Hajer Gallah, Frej Mighri, Abdellah Ajji, Jayita Bandyopadhyay, Nouceir Ahmed Ben Ghorbel, Judith Castillo-Rodriguez

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: Electrospinning; Electrospraying; Coaxial electrospinning; Nanocomposites; Nanofibers; Flexible DSSCs; Photoanode; TiO₂

Online: 17 May 2024 (04:24:01 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints202310.1499.v1

A Note on the Solar Neutrino Problem

M. Apostol

Subject: Physical Sciences, Particle And Field Physics Keywords: solar neutrinos; neutrino oscillations; coupled dirac equations; interaction with matter; admixture angle; superfluid correlations

Online: 24 October 2023 (07:45:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202307.1580.v3

Annual Solar Geoengineering: Mitigating Yearly Global Warming Increases

Alec Feinberg

Subject: Environmental And Earth Sciences, Environmental Science Keywords: solar geoengineering; space mirrors; earth mirrors; desert modification; space clusters; stratosphere injection

Online: 21 September 2023 (09:45:43 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201904.0065.v1

Solar PV Cost Reduction Potential in Japan

Robert Höller, Daniel Gudopp, Tobias Leschinsky

Subject: Engineering, Energy And Fuel Technology Keywords: Solar PV; cost reduction; balance of system; Japan

Online: 5 April 2019 (12:10:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201810.0452.v1

Solar Neutrinos Spectroscopy with Borexino Phase-II

Lino Miramonti, M. Agostini, K. Altenmueller, S. Appel, V. Atroshchenko, Z. Bagdasarian, D. Basilico, G. Bellini, J. Benziger, D. Bick, I. Bolognino, G. Bonfini, D. Bravo, B. Caccianiga, F. Calaprice, A. Caminata, S. Caprioli, M. Carlini, P. Cavalcante, F. Cavanna, A. Chepurnov, K. Choi, L. Collica, S. Davini, A. Derbin, X.F. Ding, A. Di Ludovico, L. Di Noto, I. Drachnev, K. Fomenko, A. Formozov, D. Franco, F. Gabriele, C. Galbiati, M. Gschwender, C. Ghiano, M. Giammarchi, A. Goretti, M. Gromov, D. Guffanti, C. Hagner, T. Houdy, E. Hungerford, Aldo Ianni, Andrea Ianni, A. Jany, D. Jeschke, V. Kobychev, D. Korablev, G. Korga, T. Lachenmaier, M. Laubenstein, E. Litvinovich, F. Lombardi, P. Lombardi, L. Ludhova, G. Lukyanchenko, L. Lukyanchenko, I. Machulin, G. Manuzio, S. Marcocci, J. Maricic, J. Martyn, E. Meroni, M. Meyer, M. Misiaszek, L. Papp, O. Penek, L. Pietrofaccia, N. Pilipenko, A. Pocar, A. Porcelli, G. Raikov, G. Ranucci, A. Razeto, A. Re, M. Redchuk, A. Romani, N. Rossi, S. Rottenanger, S. Schönert, D. Semenov, M. Skorokhvatov, O. Smirnov, A. Sotnikov, L.F.F. Stokes, Y. Suvorov, R. Tartaglia, G. Testera, J. Thurn, M. Toropova, E. Unzhakov, A. Vishneva, R.B. Vogelaar, F. von Feilitzsch, S. Weinz, M. Wojcik, M. Wurm, Z. Yokley, O. Zaimidoroga, S. Zavatarelli, K. Zuber, G. Zuzel

Subject: Physical Sciences, Particle And Field Physics Keywords: solar neutrinos; neutrino oscillation; Borexino

Online: 19 October 2018 (11:49:06 CEST)

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Preprint REVIEW | doi:10.20944/preprints202401.2160.v1

Advancements in Photovoltaic Cell Materials: Silicon, Organic, and Perovskite Solar Cells

Abniel Machín, Francisco Márquez

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: photovoltaic cells; silicon-based solar cells; organic-based cells; perovskite solar cells

Online: 31 January 2024 (05:53:39 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0061.v1

Green Hydrogen Driven by Wind and Solar- an Australian Case Study

Glen Currie, Edward Behrens, Samual Bolitho, Michael Coen, Thomas Wilson

Subject: Engineering, Energy And Fuel Technology Keywords: Australia; electrolysis; energy transition; hydrogen; solar; wind

Online: 2 January 2024 (09:38:32 CET)

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Preprint ARTICLE | doi:10.20944/preprints202208.0046.v2

Solar Activity Cycles Recur Epidemic and Pandemic Viruses: Space Weather Alerts

Ramy Mawad, Hanafy M. Madbouly, Ehab M. B. Mahdy

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: Space weather; Solar terrestrial connection; Climate change; Solar cycle; Environment; Epidemiology

Online: 12 January 2023 (02:36:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202008.0674.v1

Design and Programming of a Micro-Controller-Based Solar Tracking System

Saman Sarkawt Jaafar, Farhad Muhsin Mahmood

Subject: Engineering, Energy And Fuel Technology Keywords: Solar cell energy; Single Axial Solar Tracking System; Solar cell efficiency; Arduino Uno Board

Online: 30 August 2020 (15:34:39 CEST)

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