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Preprint ARTICLE | doi:10.20944/preprints201911.0028.v1

Hydrogen Sensor Based on Tunable Diode Laser Absorption Spectroscopy

Viacheslav Avetisov, Ove Bjoroey, Junyang Wang, Peter Geiser, Ketil Gorm Paulsen

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: gas sensor; hydrogen sensor; diode laser; TDLAS; WMS; absorption spectroscopy; laser spectroscopy; hydrogen

Online: 3 November 2019 (18:21:16 CET)

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Preprint ARTICLE | doi:10.20944/preprints202404.1503.v1

Investigation of Aluminium White Dross for Hydrogen Generation via Hydrolysis

Ainars Knoks, Ansis Mezulis, Christiaan Richter, Sarunas Varnagiris, Marius Urbonavicius, Darius Milcius, Rauan Meirbekova, Gudmundur Gunnarsson, Janis Kleperis

Subject: Chemistry And Materials Science, Metals, Alloys And Metallurgy Keywords: aluminium dross; waste aluminium; recycling; hydrogen generation; hydrolysis

Online: 23 April 2024 (08:57:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0427.v1

Role of Morphology on Zinc Oxide Nanostructures for Efficient Photoelectrochemical Activity and Hydrogen Production

Ahmad Fallatah, Mohammed Kuku, Laila Alqahtani, Almqdad Bubshait, Noha S. Almutairi, Sonal Padalkar, Abdullah M. Alotaibi

Subject: Chemistry And Materials Science, Nanotechnology Keywords: Zinc oxide; Electrodeposition; Morphology; Water splitting; Nanostructure; Photocatalysis

Online: 5 September 2024 (08:13:05 CEST)

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Preprint REVIEW | doi:10.20944/preprints202403.1885.v1

A review on alternative processes for green hydrogen production focused on generating hydrogen from biomass.

Aikaterina Paraskevi Damiri, Emmanuel Stamatakis, Spyridon Bellas, Emmanuel Zoulias, Georgios Mitkidis, Anestis G. Anastasiadis, Sotirios Karellas, Theocharis Tsoutsos, Athanasios K. Stubos, George Tzamalis

Subject: Engineering, Energy And Fuel Technology Keywords: Green hydrogen production; biomass; thermochemical treatment; biological treatment; electrochemical treatment

Online: 1 April 2024 (10:12:03 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1368.v1

A Multi-feature Fusion Method for Life Prediction of Automotive Proton Exchange Membrane Fuel Cell Based on TCN-GRU

Jiaming Zhang, Fuwu Yan, Changqing Du, Yiming Zhang, Chao Zheng, Jinhai Wang

Subject: Engineering, Automotive Engineering Keywords: PEMFC; Life prediction; Multi-feature fusion method; TCN-GRU

Online: 20 June 2024 (00:19:48 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.0725.v1

A Novel Nano-Laminated GdB2C2 with Excellent Electromagnetic Wave Absorption Performance and Ultra-High Temperature Thermostability

Longfei Jiang, Gang Qin, Pengxing Cui, Guoqing Wang, Xiaobing Zhou

Subject: Chemistry And Materials Science, Ceramics And Composites Keywords: GdB2C2; ternary layered materials; electromagnetic wave absorption; ultra-high temperature ceramic

Online: 13 May 2024 (09:10:36 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202207.0005.v1

Hydrogen enriched 'Maroon Gas' and 'Pink Hydrogen'

[Neale] Ramaswami Neelameggham, Ganesan Subramanian, Praveen Kalamegham

Subject: Engineering, Energy And Fuel Technology Keywords: Maroon gas; synthetic natural gas; Pink Hydrogen; hydrogen source-water, hydrogen source-hydrocarbon; energy efficient hydro-gen; Thermodynamic simulations; FACTSAGE; DWSIM

Online: 1 July 2022 (07:55:58 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0738.v1

Role of Coalesced Bainite in Hydrogen Embrittlement of Tempered Martensitic Steels

Hee-Chang Shin, Sang-Gyu Kim, Byoungchul Hwang

Subject: Engineering, Metallurgy And Metallurgical Engineering Keywords: hydrogen embrittlement; tempered martensitic steels; microstructure; coalesced bainite

Online: 10 September 2024 (09:38:32 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0410.v1

Enhancing Force Absorption, Stress-Strain and Thermal Properties of Weft-Knitted Inlay Spacer Fabric Structures for Apparel Applications

Mei-ying Kwan, Yi-fan Tu, Kit-lun Yick, Joanne Yip, Nga-wun Li, Annie Yu, Ka-wai Lo

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: Cushioning material; Compression evaluation; Inlay knitting; Stretchability

Online: 6 September 2024 (03:49:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.0566.v1

Facile Fabrication of Co–Doped Porous Carbon from Coal Hydrogasification Semi-Coke for Efficient Microwave Absorption

Yan-Fang Li, Li-Fang Wang, Shu-juan Gao, Tan-Lai Yu, Qi-Feng Li, Junwei Wang

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: Co/C composites; microwave absorption; dielectric loss; magnetic loss

Online: 9 September 2024 (07:07:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201609.0112.v1

Influence of External Magnetic Field on the Microwave Absorption Properties of Carbonyl Iron and Polychloroprene Composites Film

Haiyan Wang, Xueai Li

Subject: Chemistry And Materials Science, Surfaces, Coatings And Films Keywords: carbonyl iron; composites film; external magnetic field; microwave absorption properties

Online: 28 September 2016 (10:32:52 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201702.0011.v1

Simulation Analysis of Solution Transportation Absorption Chiller with the Capacity from 25 RT to 1000 RT

Koji Enoki, Fumi Watanabe, Seigo Tanaka, Atsushi Akiwawa, Toshitaka Takei

Subject: Engineering, Energy And Fuel Technology Keywords: absorption chiller; thermal energy transportation; solution transportation; ammonia-water; COP; simulation

Online: 4 February 2017 (07:49:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints202402.1220.v2

Hydrogen Gas Compression for Efficient Storage: Balancing Energy and Density

Alessandro Franco, Caterina Giovannini

Subject: Engineering, Energy And Fuel Technology Keywords: Hydrogen storage; Gaseous Compression; Multi-Stage Configuration; Energy analysis; Efficiency

Online: 25 April 2024 (10:39:10 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1521.v1

Exploring the Microstructural Effect of FeCo Alloy on Carbon Microsphere Deposition and Enhanced Electromagnetic Wave Absorption

Xiaoshu Jia, Heng Zhang, Fang Liu, Qiaojun Yi, Chaolong Li, Xiao Wang, Mingxing Piao

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: FeCo@CM composites; laminar-stacked FeCo alloy; MPARCVD technique; electromagnetic wave absorption

Online: 21 June 2024 (16:58:47 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0708.v1

Industrial Decarbonization through Blended Combustion of Natural Gas and Hydrogen

Alessandro Franco, Michele Rocca

Subject: Engineering, Energy And Fuel Technology Keywords: Blended combustion; Hydrogen-methane mixture; Industrial burners; Thermodynamic analysis; Decarbonization

Online: 9 July 2024 (07:00:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.1098.v1

Assessing Hydrogen Embrittlement in Pipeline Steels for Natural Gas-Hydrogen Blends: Implications for Existing Infrastructure

Hesamedin Ghadiani, Zoheir N. Farhat, Tahrim Alam, Md. Aminul Islam

Subject: Engineering, Metallurgy And Metallurgical Engineering Keywords: Hydrogen Embrittlement; Natural gas/hydrogen mixtures; Pipeline steel degradation; Electrochemical hydrogen charging; CSRT; Fatigue life

Online: 17 June 2024 (08:34:49 CEST)

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Governments worldwide are actively committed to achieving their carbon emission reduction targets, and one avenue under exploration is harnessing the potential of hydrogen. Blending hydrogen with natural gas is emerging as a promising strategy to reduce carbon emissions, as it burns cleanly without emitting carbon dioxide. This blending could significantly contribute to emissions reduction in both residential and commercial settings. However, a critical challenge associated with this approach is the potential for Hydrogen Embrittlement (HE), a phenomenon wherein the mechanical properties of pipe steels degrade due to the infiltration of hydrogen atoms into the metal lattice structure. This can result in sudden and sever failures when the steel is subjected to mechanical stress. To effectively implement hydrogen-natural gas blending, it is imperative to gain a comprehensive understanding of how hydrogen affects the integrity of pipe steel. This necessitates the development of robust experimental methodologies capable of monitoring the presence and impact of hydrogen within the microstructures of steel. Key techniques employed for this assessment include microscopic observation, hydrogen permeation tests, and tensile and fatigue testing. In this study, samples from two distinct types of pipeline steels used in the natural gas distribution network underwent rigorous examination. To induce hydrogen absorption, an electrochemical charging process is employed in a solution rich in H+ ions. This charging process, accomplished by a potentiostat applying a constant current, prompts the hydrogen evolution reaction at the steel specimen, acting as the cathode of the charging cell. Immediate tensile and fatigue testing following the charging process enables the evaluation of mechanical properties in comparison to non-charged samples. Different charging current densities are employed to simulate various hydrogen blend scenarios. The findings from this research indicate that charged samples exhibit a discernible decline in fatigue and tensile properties. This deterioration is attributed to embrittlement and reduced ductility stemming from the infiltration of hydrogen into the steel matrix. The extent of degradation in fatigue properties is correlated not only to the hydrogen content but also to the hydrogen permeability and diffusion rate influenced by steel’s microstructural features, with higher charging current densities indicating a more significant presence of hydrogen in the natural gas pipeline blend.

Preprint ARTICLE | doi:10.20944/preprints202405.0323.v1

Environmental Impact Evaluation of CO₂ Absorption and Desorption Enhancement by Membrane Gas Absorption: A life Cycle Assessment Study

Fuzhao Li, Yuexia Lv, Jinpeng Bi, Hui Zhang, Wei Zhao, Yancai Su, Tingting Du, Junkun Mu

Subject: Environmental And Earth Sciences, Environmental Science Keywords: CO₂ capture; membrane gas absorption; life cycle assessment; environmental impact

Online: 7 May 2024 (16:40:21 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.2109.v1

From Localized Laser Energy Absorption to Absorption Delocalization at Volumetric Glass Modification with Gaussian and Doughnut-Shaped Pulses

Martin Zukerstein, Vladimir P. Zhukov, Yuri P. Meshcheryakov, Nadezhda M. Bulgakova

Subject: Physical Sciences, Optics And Photonics Keywords: volumetric modification; femtosecond laser pulses; laser processing; fused silica; Maxwell’s equations; thermoelastoplastic modeling; laser-induced shock waves

Online: 30 June 2023 (07:50:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.0479.v1

Studies of the Functionalized α-Hydroxy-p-Quinone Imine Derivatives Stabilized by Intramolecular Hydrogen Bond

Anastasija Gaile, Sergey Belyakov, Ramona Durena, Ņikita Griščenko, Anzelms Zukuls, Nelli Batenko

Subject: Chemistry And Materials Science, Organic Chemistry Keywords: quinone; quinone imine; hydrogen bonding; X-ray crystallography; NMR titration; redox.

Online: 8 March 2024 (10:33:48 CET)

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Preprint REVIEW | doi:10.20944/preprints202402.0484.v1

A Review on Key Technologies and Developments of Hydrogen Fuel Cell Multi-rotor Drones

Zenan Shen, Shaoquan Liu, Wei Zhu, Daoyuan Ren, Yu Feng, Qiang Xu

Subject: Engineering, Energy And Fuel Technology Keywords: hydrogen fuel cell; multi-rotor drone; lightweight design; hydrogen storage method; energy management strategy

Online: 8 February 2024 (05:20:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202409.0281.v1

Recovered Foam Impact Absorption Systems

Sara Marcelino-Sádaba, Pablo Benito Hernandez, Miguel Angel Martin Antunes, Pedro Maria Villanueva Roldan, Fernando Veiga

Subject: Engineering, Mechanical Engineering Keywords: foam; impact absorption; recycling; sustainability

Online: 3 September 2024 (16:55:33 CEST)

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Preprint REVIEW | doi:10.20944/preprints202404.0894.v1

Unstable Metal Hydrides for Possible on-Board Hydrogen Storage

Zhijie Cao, Franziska Habermann, Konrad Burkmann, Michael Felderhoff, Florian Mertens

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: hydrogen storage; metal hydrides; intermetallic compounds; complex hydrides

Online: 15 April 2024 (08:40:46 CEST)

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Hydrogen storage in general is an indispensable prerequisite for the introduction of a hydrogen energy based infrastructure. In this respect, high-pressure metal hydride (MH) tank systems appear to be one of the most promising hydrogen storage techniques for automotive applications using proton exchange membrane (PEM) fuel cells. These systems bear the potential of achieving a beneficial compromise of comparably large volumetric storage density, a wide working temperature range, comparably low liberation of heat, and increased safety. The debatable term unstable metal hydride stands in the literature short for metal hydrides with high dissociation pressure at comparably low temperature. Such compounds may help to improve the merit of high-pressure MH tank systems. Consequently, in the last few years, some materials for possible on-board applications in such tank systems have been developed. This review summarizes the state-of-the-art developments of these metal hydrides, mainly including intermetallic compounds and complex hydrides and gives some guidelines for future developments. Since typical laboratory hydrogen uptake measurements are limited to 200 bar, a possible threshold for defining unstable hydrides could be a value of their equilibrium pressure of peq > 200 bar for T < 100°C. However, these values would mark a technological future target and most current materials, and those reported in this review, do not fulfill these requirements and need to be seen as current stages of development towards the intended target. For each of the aforementioned categories in the review, special care was taken not only to covers the pioneering and classical research, but also to portrait the current status and latest advances. For intermetallic compounds, key aspects focus on the influence of partial substitution on absorption/desorption plateau pressure, hydrogen storage capacity and hysteresis properties. For complex hydrides, the preparation procedures, thermodynamics and theoretical calculation are presented. Besides, challenges, perspectives, and development tendency of this field are also discussed.

Preprint ARTICLE | doi:10.20944/preprints202402.1699.v1

A Comprehensive Analysis of Hydrogen-Gasoline Blends in SI Engine Performance and Emissions

Zdeslav Jurić, Tino Vidovic, Jakov Šimunović, Gojmir Radica

Subject: Engineering, Energy And Fuel Technology Keywords: Gasoline-hydrogen blends; Emission reduction; Nitrogen oxides (NOx) emissions; Combustion engine modeling

Online: 29 February 2024 (08:18:36 CET)

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Preprint ARTICLE | doi:10.20944/preprints202408.2263.v1

Comparative Study of Temperature and Pressure Variation Patterns in Hydrogen and Natural Gas Storage in Salt Cavern

Zhongzhong Liu, Yuxuan Liu, Zonghao Wang

Subject: Engineering, Energy And Fuel Technology Keywords: Underground hydrogen storage; Salt cavern; Flow and heat transfer model; Hydrogen and natural gas; Diversity

Online: 2 September 2024 (10:54:44 CEST)

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Preprint REVIEW | doi:10.20944/preprints202405.0854.v1

Nano Electrocatalysts Engineering for Hydrogen Evolution Reaction by Water Splitting at High Current Density

Longlu Wang

Subject: Physical Sciences, Chemical Physics Keywords: high current density; hydrogen evolution reaction; electrocatalyst; water splitting

Online: 13 May 2024 (12:30:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1003.v1

Enhanced Energy Absorption in Bioinspired Combined TPMS-Gyroid and Walled TPMS-Gyroid Lattice Structure Manufactured via Fused Filament Fabrication (FFF)

Dawit Bogale Alemayehu, Masahiro Todoh

Subject: Engineering, Mechanical Engineering Keywords: Keywords; bio-inspired; gyroid lattice, Boolean subtraction; finite element analysis; plastic plateau; densification; energy absorption; relative density; size effect

Online: 18 March 2024 (10:39:43 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.0793.v1

Dynamics of Absorption and Concentration of Anthracene in Radishes

Haruki Shimazu

Subject: Environmental And Earth Sciences, Environmental Science Keywords: anthracene; radish; absorption; concentration

Online: 12 January 2024 (06:12:05 CET)

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Preprint ARTICLE | doi:10.20944/preprints202404.1378.v1

Application of Synephrine to Grape Increases Anthocyanin via Production of Hydrogen Peroxide, Not Phytohormones

Masaya Suzuki, Aoi Kimura, Shunji Suzuki, Shinichi Enok

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: Anthocyanin; Grape; bioactive natural products; phytohormone regulator; Hydrogen peroxide; Synephrine

Online: 22 April 2024 (10:29:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1352.v1

Oral Iron Absorption of Ferric Citrate Hydrate and Hepcidin-25 in Hemodialysis Patients: A Prospective, Multicenter, Observational Riona-Oral Iron Absorption Trial

Naohisa Tomosugi, Yoshitaka Koshino, Chie Ogawa, Kunimi Maeda, Noriaki Shimada, Kimio Tomita, Shoichiro Daimon, Tsutomu Shikano, Kazuyuki Ryu, Toru Takatani, Kazuya Sakamoto, Satonori Ueyama, Daisuke Nagasaku, Masato Nakamura, Shibun Ra, Masataka Nishimura, Chieko Takagi, Yoji Ishii, Noritoshi Kudo, Shinsuke Takechi, Takashi Ishizu, Takamoto Yanagawa, Masamichi Fukuda, Yutaka Nitta, Takayuki Yamaoka, Taku Saito, Suzuko Imayoshi, Momoyo Omata, Joji Oshima, Akira Onozaki, Hiroaki Ichihashi, Yasuhisa Matsushima, Hisahito Takae, Ryoichi Nakazawa, Koichi Ikeda, Masato Tsuboi, Keiko Konishi, Shouzaburo Kato, Maki Ooura, Masaki Koyama, Tsukasa Naganuma, Makoto Ogi, Shigeyuki Katayama, Toshiaki Okumura, Shigemi Kameda, Sayuri Shirai

Subject: Medicine And Pharmacology, Urology And Nephrology Keywords: oral iron absorption; ferric citrate hydrate; hemodialysis; hepcidin-25; iron shift

Online: 18 August 2023 (11:20:29 CEST)

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Preprint REVIEW | doi:10.20944/preprints202409.0856.v1

Assessment of Green Hydrogen as Energy Supply Alternative for Isolated Power Systems and Microgrids

Luciano T. Barbosa, Samuel D. Vasconcelos, Pedro A.C. Rosas, José F. C. Castro, Douglas C. P. Barbosa

Subject: Engineering, Energy And Fuel Technology Keywords: green hydrogen; isolated systems; power generation systems

Online: 11 September 2024 (10:45:12 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201609.0110.v1

Hydrogen Generation from Catalytic Steam Reforming Bio-Oil Model Compound—Acetic Acid Employing Ni/attapulgite Catalysts Prepared with Different Preparation Methods

Yishuang Wang, Mingqiang Chen, Tian Liang, Jie Yang, Zhonglian Yang, Shaomin Liu

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: hydrogen production; steam reforming; Ni/attapulgite; catalysts deactivation; agglomeration and sintering

Online: 28 September 2016 (10:14:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.0316.v1

Tools and Frameworks for Sustainable Business Model Innovation in the Hydrogen Context for German Steel, Cement, and Chemical Industries

Franziska Mais, Hannes Kolasch

Subject: Business, Economics And Management, Business And Management Keywords: sustainable business model innovation; decarbonization; sustainable business model; climate change; framework; energy-intensive industries

Online: 4 April 2024 (16:00:38 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1255.v1

A Comprehensive Overview of The Principles, Design, Operation, And Optimization of a Three-Bed TSA Dryer for Hydrogen Gas Dehydration

Md. Mirazul Islam

Subject: Engineering, Energy And Fuel Technology Keywords: TSA (Temperature Swing Adsorption); Hydrogen gas; Dehydration; Design

Online: 16 September 2024 (14:55:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1303.v1

Transitioning to a Hydrogen Economy: Exploring the Viability of Adapting Natural Gas Pipelines for Hydrogen Transport Through a Case Study on Compression vs. Looping

Abubakar Jibrin Abbas, Salisu Kwalami Haruna, Martin Lawrence Burby, Idoko Job John, Kabir Yar'adua Hassan

Subject: Engineering, Chemical Engineering Keywords: Gas pipeline expansion; Hydrogen; compressor station; looping; pipeline economics

Online: 21 March 2024 (12:52:10 CET)

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The growing importance of hydrogen as an energy carrier in a future decarbonized energy system has led to a surge in its production plans. However, the development of infrastructure for hydrogen delivery, particularly in the hard-to-abate sectors, remains a significant challenge. While the construction of new pipelines entails substantial investment, repurposing existing pipelines offers a cost-effective approach to jump-starting hydrogen networks. Many European countries are exploring the possibility of utilizing their current pipeline infrastructure for hydrogen transport. Yet, a critical aspect requiring extensive research is the expansion planning of these networks to accommodate increased capacity in the future. This study investigates the utilization of existing natural gas pipeline infrastructure for hydrogen transportation as a cost-saving measure. It explores two expansion strategies, namely pipeline looping and compression, for repurposing a segment of a 342 km x 36inch existing pipeline, from the Escravos – Lagos gas pipeline system (ELPS) in Nigeria, for hydrogen transport. Employing the Promax® process simulator tool, the study assesses compliance with the API RP 14E and ASME B31.12 standards for hydrogen and hydrogen-methane blends. Both expansion strategies demonstrate acceptable velocity and pressure drop characteristics for hydrogen blends of up to 40%. Additionally, the increase in hydrogen content leads to heightened compression power requirements until approximately 80% hydrogen in the blends for compression, and a corresponding extension in looping length until around 80% hydrogen in the blend for looping. Moreover, the compression option proves to be more economically viable for all investigated proportions of hydrogen blends for the PS1-PS5 segment of the Escravos – Lagos gas pipeline case study. The percentage price differentials between the two expansion strategies reach as high as 495% for a 20% hydrogen proportion in the blend. This study offers valuable insights into the technical and economic implications of repurposing existing natural gas infrastructure for hydrogen transportation.

Preprint ARTICLE | doi:10.20944/preprints202310.1393.v1

A Computational Study of Hydrogen Dispersion and Explosion after Large-Scale Leakage of Liquid Hydrogen

Seong Yong Choi, Chang Bo Oh, Kyu Hyung Do, Byung-Il Choi

Subject: Engineering, Chemical Engineering Keywords: liquid hydrogen (LH2); dispersion; explosion; pseudo-source model; liquid pool model; hydrogen leakage

Online: 23 October 2023 (08:31:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202401.1405.v1

Enhancements of Wave Power Absorption with Arrays and a Vertical Breakwater

Fuat Kara

Subject: Engineering, Energy And Fuel Technology Keywords: mean interaction factor; absorbed wave power; multibody interaction; WECs arrays; method of images

Online: 18 January 2024 (13:55:36 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.1699.v1

Broadband Waterborne Multiphase Metasurface with Simultaneous Wavefront Manipulation and Energy Absorption

An Yi, Han Zou, Aiguo Zhao

Subject: Engineering, Marine Engineering Keywords: metamaterials; pentamode materials; acoustic metasurface; dispersion curve

Online: 25 June 2023 (02:30:06 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202106.0217.v1

Analysis of Heat Absorption and Collection Based on Solid Structures Collector

Yan Liu, Wenbin Liu, Qing Gao, Yong Huang, Peizhuo Li, Yongzhen Wang

Subject: Engineering, Automotive Engineering Keywords: solar collection; solid structure; heat absorption analysis; collection heat analysis; reflection spectrum

Online: 8 June 2021 (12:06:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.1099.v1

Ultrahigh Nonlinear Optical Absorption in 2D MXene Films

David Moss

Subject: Physical Sciences, Optics And Photonics Keywords: 2D materials; nonlinear optics; MXene; Z-scan technique

Online: 15 August 2023 (07:11:04 CEST)

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Preprint REVIEW | doi:10.20944/preprints202001.0079.v1

Review of Absorption Oil Content in Water Injection

Aditya Nugraha Ernawan, Alfi Fachrizal, Angga Wijaya, Bima Syahreza, Muhammad Ridwan Alkhandi, Mayang Firdaus, Mulyono Dyatmahendri, Rizka Ananda, Wily Rustam, Muhammad Khoirul Afdhol, Tomi Erfando

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: absorption; oil content; water injection; treatment

Online: 9 January 2020 (09:44:35 CET)

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Preprint ARTICLE | doi:10.20944/preprints202202.0275.v1

A Mechanism for Hydrogen Embrittlement in Martensitic Steel Based on Hydrogen Dilation

Michael F McGuire, Roy J Matway

Subject: Chemistry And Materials Science, Metals, Alloys And Metallurgy Keywords: hydrogen embrittlement; martensite; dislocation density; fracture mechanics; stainless steel

Online: 22 February 2022 (11:37:29 CET)

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Preprint ARTICLE | doi:10.20944/preprints202306.1507.v1

Absorption and Distribution of Imidacloprid and Its Metabolites in goldfish(Carassius Auratus Linnaeus)

Wanghui Xu, Lulu Zhang, Jiayin Hou, Xiaohua Du, Liezhong Chen

Subject: Biology And Life Sciences, Toxicology Keywords: Imidacloprid; Goldfish; Metabolites; Tissue Distribution; Toxicity

Online: 21 June 2023 (08:57:58 CEST)

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Imidacloprid is the first-generation neonicotinoid insecticide. But, the long-term use of im-idacloprid as a pesticide has caused severe water pollution. Recently, the toxicity of imidacloprid to aquatic organisms has received increasing attention. This study aimed to investigate the ab-sorption and distribution of imidacloprid in various tissues (gills, intestine, liver, muscle, brain, and gonads) of goldfish through short-term and continuous exposure tests for 28 days. The re-sults of short-term exposure indicated that the concentration of imidacloprid and its metabolites in tissues at the transfer stage decreased steadily after 1 day of 40 mg/l imidacloprid water treatment and was below the detection limit after 3 days. Continuous exposure for 28 days at various treatment concentrations showed that the concentrations of imidacloprid and its metab-olites differed significantly among the different tissues of the goldfish. In the 20 mg/l treatment group (S1), the highest concentration of imidacloprid was found in the liver (12.04 μg /gtissue), followed by the intestine (9.91 μg /gtissue), muscle (6.20 μg /gtissue), gill (6.11 μg /gtissue), gonads (5.22 μg /gtissue), and brain (2.87 μg /gtissue). In the 40 mg/l treatment group (S2), the order of tissue concentrations was similar to that of the S1 group, with the highest concentration observed in the liver (12.04 μg/gtissue), followed by the intestine (9.91 μg/gtissue), muscle (6.20 μg/gtissue), gill (6.11 μg/gtissue), gonads (5.22 μg/gtissue), and brain (2.87 μg/gtissue). Fur-thermore, the study detected 5-hydroxyimidacloprid, imidacloprid urea, and 6-chloronicotinic acid in imidacloprid metabolites in all tissues, while imidacloprid was detected only in the intes-tine and liver. Overall, the results of this study contribute to a better understanding of the met-abolic behavior of imidacloprid in organisms and provide new data to support the assessment of imidacloprid toxicity in fish.

Preprint REVIEW | doi:10.20944/preprints201809.0392.v1

Hydrogen Peroxide and Redox Regulation of Development

Christine Rampon, Michel Volovitch, Alain Joliot, Sophie Vriz

Subject: Biology And Life Sciences, Cell And Developmental Biology Keywords: H2O2, redox signalling, development, regeneration, adult stem cells, metazoan

Online: 19 September 2018 (21:42:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.0494.v1

Moisture Absorption Characteristics and Subsequent Mechanical Properties Loss of Enset-PLA Composites

Abebayehu Abdela Gelgelu, Maxim Vandaele, Sam Haenen, Bart Buffel, Frederik Desplentere, Belete Sirahbizu

Subject: Chemistry And Materials Science, Ceramics And Composites Keywords: hydrophilic; PLA; plasticize; ﬁber concentration

Online: 7 August 2023 (10:07:03 CEST)

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Preprint REVIEW | doi:10.20944/preprints202306.1136.v1

Research Status and Future Perspectives of Low Dimensional Electromagnetic Wave Absorption Materials

Huaping Xu, Tao Tang, Zengming Man, Xiaofeng Wu, Haiqiang Zhao, Xiaohui Liang, Chuanying Li

Subject: Chemistry And Materials Science, Electronic, Optical And Magnetic Materials Keywords: electromagnetic wave absorption; attenuation mechanism; low-dimensional materials

Online: 15 June 2023 (12:00:25 CEST)

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Preprint REVIEW | doi:10.20944/preprints202012.0250.v1

Intestinal Absorption of β-Glucans and Their Effect on the Immune System

Shingo Hino, Naomichi Nishimura, Tsukasa Matsuda, Tatsuya Morita

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: β-glucan; intestinal absorption; immune system

Online: 10 December 2020 (11:30:57 CET)

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Preprint ARTICLE | doi:10.20944/preprints202008.0290.v1

Ablation-Dominated Arcs in CO² Atmosphere - Part II: Molecule Emission and Absorption

Ralf Methling, Nicolas Götte, Dirk Uhrlandt

Subject: Engineering, Electrical And Electronic Engineering Keywords: circuit breaker; switching arc; optical emission spectroscopy; optical absorption spectroscopy; current zero; SF6 alternative gases; CO2; PTFE; Swan bands; CuF

Online: 13 August 2020 (06:00:47 CEST)

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Working Paper ARTICLE

Features of Structure and Absorption in the Jet-launching Region of M87

Wei Zhao, Xiaoyu Hong, Tao An, Xiaofeng Li, Xiaopeng Cheng, Fang Wu

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: galaxies: individual (m87); galaxies: jets; galaxies: active; radio continuum: galaxies

Online: 1 October 2019 (16:01:28 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.2231.v1

Investigating the Fatigue Response of Cathodically Charged Cold-Finished Mild Steel to Varied Hydrogen Concentrations

Emmanuel Sey, and Zoheir N. Farhat

Subject: Engineering, Mechanical Engineering Keywords: cathodic charging; cyclic loading; hydrogen embrittlement; diffusible hydrogen

Online: 30 July 2024 (09:25:49 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0289.v2

Numerical Analysis of SO₂ Absorption inside a Wet Scrubber

Amedeo Amoresano, Giuseppe Langella, Paolo Iodice, Silvia Roscioli

Subject: Engineering, Mechanical Engineering Keywords: Seawater scrubber; SOX; Absorption

Online: 29 April 2023 (02:47:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202104.0445.v1

Phase Correction for Absorption Mode Two-dimensional Mass Spectrometry

Marc-André Delsuc, Kathrin Breuker, Maria A. van Agthoven

Subject: Chemistry And Materials Science, Analytical Chemistry Keywords: mass spectrometry; two-dimensional; tandem mass spectrometry; phase correction; absorption mode; data processing

Online: 16 April 2021 (12:41:15 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202409.1159.v1

Hydrogen and CO Over-Equilibria in Catalytic Reactions of Methane Reforming

Vitaliy R. Trishch, Mykhailo O. Vilboi, Gregory S. Yablonsky, Dmytro O. Kovaliuk

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: modelling; optimization; methane reforming; chemical equilibrium; conservatively perturbed equilibrium; extremum; CPE point

Online: 16 September 2024 (10:08:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202404.1643.v1

Numerical Analysis of Hydrogen-Methane Flame in Different Header Types of Premixed Combustors

Young Bae Kim, Jaeyoung Lee, Chang Beom Son, Young Sik Jeong

Subject: Engineering, Mechanical Engineering Keywords: thin flame combustor; hydrogen flame; methane flame; numerical analysis

Online: 28 April 2024 (04:50:46 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202312.0376.v1

Absorption and Biotransformation of Selenomethionine and Selenomethionine-oxide by Wheat Seedlings (Triticum aestivum L.)

Qi Wang, Siyu Huang, Qingqing Huang, Yao Yu, Huafen Li, Yanan Wan

Subject: Biology And Life Sciences, Agricultural Science And Agronomy Keywords: wheat; selenomethionine; selenomethionine-oxide; uptake; Se speciation; interaction

Online: 6 December 2023 (10:39:03 CET)

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Preprint ARTICLE | doi:10.20944/preprints202305.1453.v1

Energy and Probability Density Computation for Muonic Hydrogen

Ajay S., Suvrata P. Hegde

Subject: Physical Sciences, Atomic And Molecular Physics Keywords: Muonic hydrogen; energy eigenvalues; probability density distribution; hydrogen spectra; programming

Online: 22 May 2023 (02:42:45 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202003.0454.v1

A Study on Shock Absorption Characteristics of Honeycomb-inserted Bollards

Sangwon Seon, Kyoungwok Kim, Cheonho Bae, Won Yi

Subject: Engineering, Mechanical Engineering Keywords: bollard; honeycomb; Polylactic acid (PLA); LS-DYNA; shock-absorption; in-plane

Online: 31 March 2020 (10:14:16 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.0824.v1

Hydrogen Bonding in Amorphous Indomethacin

Chris J Benmore, Jeffrey L. Yarger, Stephen Davidowski, Cyd Shrader, Pamela Smith, Stephen R Byrn

Subject: Medicine And Pharmacology, Pharmacy Keywords: Amorphous; Pair Distribution Function; Indomethacin; X-ray diffraction; Monte Carlo simulation

Online: 10 July 2024 (05:08:33 CEST)

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Preprint REVIEW | doi:10.20944/preprints202103.0700.v1

Hydrogen Technology, a Short Overview

Alexander Charitos, Sofoklis Sokratis Makridis

Subject: Engineering, Automotive Engineering Keywords: hydrogen; climate change; emissions; production; storage; utilization; energy; technology

Online: 29 March 2021 (14:46:51 CEST)

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The Residential and Industrial zones as is, rely heavily, if not exclusively, on Hydrocarbons. Hydrocarbon thermal machinery such as Spark Ignition-Compression Ignition engines, Gasoline-Diesel generators, Coal-Lignite gasifiers, residential diesel-powered heating systems, Pyrolysis units and so on, are commonly met all around the planet. Such technology practically oxidizes Hydrocarbons to produce either heat, steam or useful mechanical work depending on the application, though energy losses are not, by any means, insignificant. Advanced material processing is an industrial sector who’s energy demand is significant and it is important for the general public to come to terms with the fact that by implementing Hydrogen technology to power such plant while at the same time improving the energy equilibrium of houses(advanced materials), communities would be taking major steps towards Climate Change effects debilitation. The downside of Hydrocarbon thermochemical exploitation can be described by the limited resources-reserves and the gaseous pollutant emissions (CO2, CO, NOx, SOx). In recent years, the Industrial zone as a whole has began taking a turn towards Electrification without having established the necessary infrastructure to support such a transition. Indicatively, at current rate of production, dead Lithium-Ion batteries are projected to reach as high as 11,000 metric tons by 2030, yet there is no recycling scheme in place, not to mention the prospect of that number rising even more, given the recent e-mobility trend. As it pertains to Electrification, such powertrains-machinery require electricity and a battery. Electricity production is mainly achieved through Coal-Lignite gasification, Batteries require metals, among others, for manufacturing, meaning that up-on mining, local water resources are contaminated, another very important ‘aspect’ of Lithium(per say) mining is that child labor is often associated with such processes, a truly despicable act. All of the above paint a crystal-clear picture as to how ‘environmentally friendly’ reckless-rushed Electrification really is. Climate Change is up-on us and it’s effects on the planet are obvious, the most important of which is glacier melting due to rising of the global Temperature. The COVID-19 crisis is a sign of what could come from glacier melting could as ice contains potentially harmful-toxic to humans, biological entities that are sure to be introduced to the general public if we were to continue exploiting mineral resources. Purpose of this paper is to provide a general overview of the technology around Hydrogen.

Preprint ARTICLE | doi:10.20944/preprints202002.0343.v1

Towards Heralded Two-Photon Absorption and Two-Photon Excited Fluorescence for Quantum Microscopy and Spectroscopy

Andreas Jechow

Subject: Physical Sciences, Optics And Photonics Keywords: multi-photon processes; quantum optics; photon statistics; fluorescence

Online: 24 February 2020 (02:57:17 CET)

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Preprint ARTICLE | doi:10.20944/preprints202401.1547.v1

Electrical Conductivity, EMI Absorption Shielding Performance, Curing Process and Mechanical Properties of Rubber Composites

Ján Kruželák, Andrea Kvasničáková, Michaela Džuganová, Rastislav Dosoudil, Ivan Hudec, Henrich Krump

Subject: Chemistry And Materials Science, Polymers And Plastics Keywords: rubber; manganese-zinc ferrite; nickel-zinc ferrite; carbon black; carbon fibers; electromagnetic absorption shielding

Online: 22 January 2024 (04:29:44 CET)

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Preprint ARTICLE | doi:10.20944/preprints202308.0656.v1

Nonlinear Optical Absorption of Impurities in Hexagonal Quantum Wires: Electric and Magnetic Field Effects

Anna Sofía Giraldo-Neira, Tomas Sosa-Giraldo, Juan Alejandro Vinascos-Sánchez, Álvaro Luis Morales Aramburo, Carlos Alberto Duque Echeverri, Miguel Eduardo Mora-Ramos, Ricardo León Restrepo Arango

Subject: Physical Sciences, Condensed Matter Physics Keywords: intraband energy transitions; optical absorption coefficients; hexagonal quantum well wires; GaAs/AlGaAs; core/shell structure

Online: 8 August 2023 (11:20:23 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.0890.v1

Investigation of Broadband Optical Nonlinear Absorption and Transient Dynamics in Orange IV Containing Azobenzene

Quanhua Wu, Rui Ruan, Xingxing Li, Yujie Zhao, Yang Li, Yu Fang, Yongqiang Chen, Quanying Wu, Yinglin Song, Xingzhi Wu

Subject: Physical Sciences, Optics And Photonics Keywords: Nonlinear optics; Z-scan; Transient absorption and refraction; Pump probe

Online: 25 April 2023 (05:40:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202302.0229.v1

Branching Random Walks with One Particle Generation Center and Possible Absorption at Every Point

Elena Filichkina, Elena Yarovaya

Subject: Computer Science And Mathematics, Probability And Statistics Keywords: branching random walks; moments of particle numbers; evolution operator; Green’s function

Online: 14 February 2023 (03:29:07 CET)

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Preprint ARTICLE | doi:10.20944/preprints202112.0002.v1

Performance Study of Absorption Tower and Adsorption Reactor to Eliminate Ammonia Gas as Pollutant

Ikha Rasti Julia Sari, Januar Arif Fatkhurrahman, Yose Andriani

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: ammonia; emission control; saturation point; absorption tower; adsorption reactor

Online: 1 December 2021 (10:22:31 CET)

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Preprint REVIEW | doi:10.20944/preprints202406.0609.v1

A Review on Hydrogen Storage and Transportation: Progresses and Challenges

Zongao Xie, Qihang Jin, Wei Lu

Subject: Engineering, Energy And Fuel Technology Keywords: hydrogen; storage; transportation; clean energy; sustainability

Online: 11 June 2024 (08:05:48 CEST)

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Preprint REVIEW | doi:10.20944/preprints202407.0189.v1

Renewable Hydrogen From Biomass: Technological Pathways and Economic Perspectives

J.R.C. Rey, C. Mateos-Pedrero, A. Longo, B. Rijo, P.S.D. Brito, Paulo Ferreira, Catarina Nobre

Subject: Chemistry And Materials Science, Chemical Engineering Keywords: renewable hydrogen; biomass; chemical methods; biological methods; membrane separation systems

Online: 2 July 2024 (11:05:13 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202102.0295.v1

Sintering of Mg and its Alloys under Hydrogen Atmospheres

Johannes Schaper

Subject: Physical Sciences, Acoustics Keywords: Sintering; light alloys

Online: 12 February 2021 (09:26:58 CET)

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Preprint ARTICLE | doi:10.20944/preprints202405.1582.v1

An Overview of the Arguments in Literature, For and Against the Use of Green Hydrogen for the Production of Direct Reduced Iron

Göran Roos

Subject: Business, Economics And Management, Business And Management Keywords: Green hydrogen; Direct Reduced Iron (DRI); Decarbonisation; Steel industry; Carbon Capture and Storage (CCS); Renewable energy; Electrolysis; Energy efficiency; Geopolitical implications; Social acceptance

Online: 23 May 2024 (16:45:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1876.v1

Application of Successful EU Funds Absorption Models on Sustainable Regional Development

Marko Šostar, Vladimir Ristanović, Chamaru de Alwis

Subject: Business, Economics And Management, Business And Management Keywords: Sustainable regional development; EU funds; Development projects; Absorption

Online: 28 June 2023 (04:04:18 CEST)

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The research paper comprehensively and consistently addresses all relevant theoretical areas related to the topic and includes an extensive empirical analysis of the absorption of EU funds and their impact on the sustainable development of Croatia, Slovenia, Hungary, and Poland. The analysis aims to investigate the efficiency of the absorption of funds from the EU, the impact of these funds on regional development of countries, as well as the reasons for such impacts. The "Regional Development Model Based on EU Funds" was tested with the aim of applying the model to the Republic of Croatia, countries in the region, and other European countries to achieve a higher level of absorption of financial resources from the available EU funds. Data for the empirical analysis were collected using a highly structured survey questionnaire on a sample of 244 respondents involved in the preparation and implementation of EU-funded projects. The contribution of economic science in theoretical terms arises from the development of scientific knowledge and ideas about the importance of increasing the number of development projects that will increase the absorption of funds from the European Union, thereby increasing economic activities in Croatia and the region. The expected contribution of economic science in the applied sense is based on the formulation of the "Regional Development Model Based on EU Funds," which is based on the application of knowledge, good practices, and stakeholder experiences, considering relevant indicators from available sources. The greatest contribution is demonstrated through testing the "Regional Development Model Based on EU Funds," which is applicable to the Republic of Croatia, countries in the region, and other European countries over a longer period. Finally, research of the impact of EU funds on the regional development of recipient countries is considerably less represented and very modest, only in the "upswing" of systematic scientific research. The research aims to fill the gaps in research and encourage thinking of key stakeholders responsible for regional development, who should eventually realize the importance of defining a regional policy aimed at EU funds as a key to regional development and reducing regional disparities within countries.

Preprint ARTICLE | doi:10.20944/preprints202306.0095.v1

Lightweight Co₃O₄/CC Composites with High Microwave Absorption at Low Frequency

Bing An, Mei Wu, Xinhuang Yang, Zengming Man, Xiaohui Liang, Chunyang Feng

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: Low frequency; Co3O4/CC; Co-MOFs/CC; thinner thickness

Online: 1 June 2023 (13:35:25 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.2609.v1

Enhancement of Sustainable Maintenance in Hydrogen Compressor Monitoring by the Utilization of Fractional Factorial Experiments to Optimize the Hyperparameters of a Self-Attention-Based Neural Network

Salvador Pérez, Cristina González-Gaya, Miguel A. Sebastián

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: sustainable maintenance; Industry 4.0; forecast; neural network; hyperparameter.

Online: 31 July 2024 (15:15:50 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202403.1821.v1

Oxygen Defects Containing TiN Films for the Hydrogen Evolution Reaction: A Robust Thin Film Electrocatalyst With Outstanding Performance

Ayoub Laghrissi, Mohammed Es-Souni

Subject: Chemistry And Materials Science, Electrochemistry Keywords: Hydrogen evolution reaction; Titanium nitride; Oxygen defects; TiNO; linear sweep voltammertry; DFT

Online: 29 March 2024 (10:01:45 CET)

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Preprint ARTICLE | doi:10.20944/preprints202010.0589.v1

Natural Hydrogen System in Western Australia?

Reza Rezaee

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: Natural Hydrogen System; circular depressions; Archean iron-rich Craton; Western Australia

Online: 28 October 2020 (11:57:31 CET)

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Preprint ARTICLE | doi:10.20944/preprints202403.1178.v1

Metamaterial Labyrinth Wall Low-Frequency Sound Absorption Measurements for Restaurant Room Acoustics and Decorative Applications

Rolf Bader, Johannes Mischo, Stefanie Gernert, Hendrik Mischo

Subject: Physical Sciences, Acoustics Keywords: Room Acoustics, Acoustic Metamaterials, Restaurant Acoustics

Online: 20 March 2024 (09:11:45 CET)

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Preprint REVIEW | doi:10.20944/preprints202308.0298.v2

Absorption of Light in Vertical III-V Semiconductor Nanowires for Solar Cell and Photodetector Applications

Nicklas Anttu

Subject: Physical Sciences, Applied Physics Keywords: III-V semiconductor; nanowire; absorption; solar cell; photodetector

Online: 17 August 2023 (07:53:02 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202203.0382.v1

The Characteristic of CFRP Laminates Related to Water Absorption Subjected to Tensile, Bending, and Compression

Sudarisman Sudarisman, Alfian Hidayat, Haniel Haniel, Muhammad Tiopan, Rela Adi Himarosa, Muhammad Akhsin Muflikhun

Subject: Engineering, Mechanical Engineering Keywords: CFRP; vacuum infusion; water absorption; tensile test; bending test; compressive test

Online: 29 March 2022 (12:22:53 CEST)

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Preprint DATA DESCRIPTOR | doi:10.20944/preprints202202.0305.v1

Theoretical Calculations and Analysis Method of the Physicochemical Properties of Phytochemicals to Predict Gastrointestinal Absorption

Luis A. Vélez, Yamixa Delgado, Yancy Ferrer-Acosta, Ivette J. Suárez-Arroyo, Priscilla Rodríguez, Daraishka Pérez

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: Physicochemical properties; Gastrointestinal absorption; Lipinski's rules; Veber's rules; Ghose's rules; Muegge's rules

Online: 24 February 2022 (08:35:30 CET)

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Preprint ARTICLE | doi:10.20944/preprints202108.0390.v1

Connection between Sinc Approximation for High-Energy Absorption Cross Section and Shadow of Black Holes

Ali Övgün

Subject: Physical Sciences, Atomic And Molecular Physics Keywords: Gravitation; Black hole; Shadow; High-energy physics; Cross-section; Null geodesics

Online: 18 August 2021 (14:31:11 CEST)

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Working Paper REVIEW

Iron and Zinc Interactions: Does Entero-Pancreatic-Zinc Excretion Cross-Talk with Intestinal Iron Absorption?

Kondaiah Palsa, Puneeta Singh Yaduvanshi, Paul Sharp, Raghu Pullakhandam

Subject: Biology And Life Sciences, Food Science And Technology Keywords: Iron, Zinc, Interactions, DMT1, ZIP4, Pancreas, Metabolism, Homeostasis, Intestine, Caco-2 cells

Online: 9 July 2019 (14:32:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202406.0385.v1

Hydrogen and Methane Production in Response to Different Types of Dietary Fiber and Its Relationship to Postprandial Glucose Levels in Patients with Type 2 Diabetes and Normoglycemic Subjects

Inna V Misnikova, Yulia A. Kovaleva, Svetlana Y Shokur, Tyler W. LeBaron, Oxana Viktorovna Povarova, Oleg S. Medvedev

Subject: Medicine And Pharmacology, Dietetics And Nutrition Keywords: dietary fiber; molecular hydrogen; methane; type 2 diabetes; postprandial glucose levels

Online: 6 June 2024 (12:49:56 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202011.0597.v1

Are Hydrogen Peroxide, Hypochlorite and Peracetic Acid Potential Endocrine Disruptors?

Shu-shu Zhong, Jun Zhang, Ze-hua Liu, Zhi Dang, Yu Liu

Subject: Biology And Life Sciences, Biochemistry And Molecular Biology Keywords: Arylsulfatase; β-glucuronidase; Hydrogen peroxide; Hypochlorite; Inhibition

Online: 23 November 2020 (19:22:12 CET)

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Preprint ARTICLE | doi:10.20944/preprints201905.0364.v1

Laser-Plasma and Self-Absorption Measurements with Applications to Analysis of Atomic and Molecular Stellar Astrophysics Spectra

Christian Parigger, Christopher M Helstern, Ghaneshwar Gautam

Subject: Physical Sciences, Astronomy And Astrophysics Keywords: atomic and molecular spectroscopy; time-resolved spectroscopy; laser plasma; laser-induced optical breakdown; stellar astrophysics spectra; white dwarf stars; hydrogen; carbon Swan spectra

Online: 30 May 2019 (08:53:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202405.2009.v1

Characterization of Na_0.5Bi_0.5TiO₃ Single Crystals by X-ray Diffraction, Scanning Electron Microscopy, X-ray Photoelectron Spectroscopy, Optical Absorption, Electric and Thermoelectric Properties Studies

Jan J.Suchanicz, Kamila Kluczewska-Chmielarz, Grzegorz Jagło, Andrzej Kruk, Antoni Kania, Dorota Sitko, Michalina Nowakowska-Malczyk, Marcin Łapiński, Grzegorz Stachowski, Tatiana Kruzina

Subject: Chemistry And Materials Science, Electronic, Optical And Magnetic Materials Keywords: Na_0.5Bi_0.5TiO₃ single crystals; insulator-metal transition; electrical conductivities; relaxation process

Online: 30 May 2024 (10:42:39 CEST)

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High-quality and large-size single crystals of lead-free Na0.5Bi0.5TiO3 were grown using the Czo-chralski technique. The crystals had pure perovskite structure with rhombohedral symmetry and were translucent in the visible and near infrared spectral ranges recorded in the interval 350-1050 nm. The energy gaps determined from the X-ray photoelectron spectroscopy (XPS) and optical measurements were approximately 2.92 eV. The current-voltage characteristics, depolarization current, dc (σdc) and ac (σac) electrical conductivity, and Seebeck coefficient of the crystals were investigated. The frequency/temperature-dependent electrical properties were also measured and analyzed through complex impedance spectroscopy. An overlapping reversible insulator-metal transition (resistive switching) on nanoscales, caused by the electric field, was detected. This was the first time that most of these investigations were performed for this material. The following conductivity mechanisms of NBT single crystals were identified: (i) quasi-free electron and hole conduction and hopping-charges mechanism at low temperatures, (ii) small polaron conductivity in the middle temperature range, and (iii) a significant contribution of the oxygen vacancies to conductivity in the high temperature range. The activation energy values determined from the conductivity data, the imaginary part of the electric impedance and the modulus indicate that the relaxation process in the high-temperature range is attributable to both single and double ionized oxygen vacancies, in combination with the hopping of electrons between Ti4+ and Ti3+. P-type electrical conductivity was also found. These discoveries create new possibilities of reducing the electrical conductivity of NBT and improving the process of effectively poling this material. The density of the electronic states was investigated using an ab initio method. The energy gap cal-culated for NBT (R3c) was 2.8 eV, and is well comparable to those determined from XPS and optical measurements. Our results indicate the possibility of tuning material properties by inten-tionally creating non-stoichiometry/structural defects (oxygen vacancies, cation excess and cation deficiency).

Preprint ARTICLE | doi:10.20944/preprints202409.0919.v1

Multiphysics Studies of 3D Plate Fin Heat Exchanger Filled with Ortho-Para- Hydrogen Conversion Catalyst for Hydrogen Liquefaction

Liangguang Tang, Doki Yamaguchi, Jose Orellana, Wendy Tian

Subject: Engineering, Chemical Engineering Keywords: plate fin heat exchanger; ortho-para- hydrogen conversion; Multiphysics modelling; hydrogen liquefaction

Online: 12 September 2024 (11:29:11 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202308.0653.v1

CFD Thermo-hydraulic Evaluation of Liquid Hydrogen Storage Tank with Different Insulation Thickness of Small-scale Hydrogen liquefier

Soo-Jin Jeong, Sang-Jin Lee, Seong-Joon Moon

Subject: Engineering, Energy And Fuel Technology Keywords: computational fluid dynamics; liquefied hydrogen storage tank; small-scale hydrogen liquefier; boil-off gas; VOF (Volume of Fluid)

Online: 9 August 2023 (02:54:53 CEST)

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Accurate evaluation of thermo-fluid dynamic characteristics in tank are critically important for designing liquid hydrogen tank of small-scale hydrogen liquefier to minimize heat in-leak into the liquid and ullage. Due to the huge cost, most future liquid hydrogen storage tank designs will have to rely on predictive computational models for storage tank pressurization and heat-leak minimization. Thus, reliable on predictive numerical models to aid design process of tank design have been required. Therefore, in this study, in order to improve the storage efficiency of the small-scale hydrogen liquefier, a three-dimensional CFD model that can predict the boil-off rate and the thermo-fluid characteristics due to heat penetration has been developed. The prediction performance and accuracy of the CFD model is validated on the basis of the comparisons between its results and previous experimental data and a good agreement is obtained. To evaluate insulation performance of polyurethane foam according to thickness, the pressure change and thermo-fluid characteristics in a partially liquid hydrogen tank, subject to fixed ambient temperature and wind velocity, has been investigated numerically. Three different insulation thickness were considered to investigate not only interfacial characteristics between liquid and ullage but thermo-fluid dynamics in hydrogen storage tank for various heat-leak situation. The results indicate that as the insulation thickness becomes thinner and more heat penetration exists, natural convection by buoyancy develops stronger, so strong vortices are created near the interfacial zone by upward flow driven by buoyancy. In particular, as the amount of heat in-leak increased, wider and stronger heat accumulation was found in the top dished head area of the ullage area. In addition, it was confirmed that the CFD model developed in this study could well describe the phenomenon in which the temperature of the tank wall and the insulation mat increased at a faster rate due to faster heat transfer from the vapor and interface. In the future, the numerical model developed in this study will be used for optimizing insulation system of storage tank for small-scale hydrogen which is cost-effective and highly efficient.

Preprint ARTICLE | doi:10.20944/preprints202309.1819.v1

Absorption-Translocation of Veterinary Antibiotics in Rice Plants Introduced with Irrigation Water

Jae Young Cho, Van Hay Duong, Il-Hwan Seo, Hee Su Jeon

Subject: Environmental And Earth Sciences, Environmental Science Keywords: Veterinary antibiotics; translocation; phytotoxicity; bioconcentration factor; rice paddy

Online: 27 September 2023 (06:57:05 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202306.1509.v1

Noise Reduction in Helicopter Cabins Using Microperforated Panel Composite Sound Absorption Structures

Chenglei Li, Yang Lu, Chunbo Lan, Yang Wang

Subject: Engineering, Aerospace Engineering Keywords: helicopter; cabin noise reduction; microperforated panel; composite acoustic structure; sound field analysis; acoustic metamaterials

Online: 21 June 2023 (08:51:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202304.1221.v1

Sustainable Sawdust/Eucalyptol Absorption Matrix for Odor Slow-Release in Plywood Floor

Yuliya Logvina, Sónia Fernandes, Luís Pinto da Silva, Joaquim Esteves da Silva

Subject: Chemistry And Materials Science, Paper, Wood And Textiles Keywords: Carbon footprint; Wood residuals; Sawdust; eucalyptol; Odor release; Plywood; carbon footprint

Online: 29 April 2023 (07:27:51 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202103.0589.v1

Identification of LLDPE Constitutive Material Model for Energy Absorption in Impact Applications

Luděk Hynčík, Petra Kochová, Jan Špička, Tomasz Bońkowski, Robert Cimrman, Sandra Kaňáková, Radek Kottner, Miloslav Pašek

Subject: Chemistry And Materials Science, Biomaterials Keywords: LLDPE; quasi-static and dynamic experimental tests, impact energy absorption; material parameter identification; constitutive material model; validation; simulation

Online: 24 March 2021 (13:38:40 CET)

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Preprint ARTICLE | doi:10.20944/preprints202008.0258.v2

Off-Resonant Absorption Enhancement in Single Nanowires via Graded Dual-Shell Design

Wenfu Liu, Xiaolei Guo, Shule Xing, Haizi Yao, Yinling Wang, Liuyang Bai, Qi Wang, Liang Zhang, Dachuan Wu, Yuxiao Zhang, Xiao Wang, Yasha Yi

Subject: Chemistry And Materials Science, Nanotechnology Keywords: single nanowires; silicon; dual shells; off-resonance; absorption; photocurrent

Online: 31 August 2020 (08:30:22 CEST)

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Preprint COMMUNICATION | doi:10.20944/preprints201908.0192.v1

Generation of Optical Absorption Band in Colloidal Coffee at Extremely Alkaline pH

Arindam Kushagra, Akshaya Pandey

Subject: Chemistry And Materials Science, Applied Chemistry Keywords: caffeine; colloidal coffee; optical absorption; pH sensor; solute-solvent interactions; UV absorber

Online: 19 August 2019 (04:14:30 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201709.0036.v1

Novel Semi-parametric Algorithm for Interference-immune Tunable Absorption Spectroscopy Gas Sensing

Umberto Michelucci, Francesca Venturini

Subject: Physical Sciences, Optics And Photonics Keywords: interference; interference cancellation; noise reduction; digital filtering; spectroscopy; sensors

Online: 11 September 2017 (04:42:08 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202408.0569.v1

Identification of Relevant Research Topics Based on Pooled Bibliometric Data of International Journal of Hydrogen Energy Publications for 2022–2024 from the Lens and ScienceDirect Platforms

Boris Chigarev

Subject: Engineering, Energy And Fuel Technology Keywords: International Journal of Hydrogen Energy; The Lens; ScienceDirect; VOSviewer; Scimago Graphica; FP-growth

Online: 8 August 2024 (12:01:35 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202407.1039.v1

Hydrogen Bond Strengthens Acceptor Group: The Curious Case of The C-H...O=C Bond

Kingshuk Basu, Esther S. Brielle, Isaiah T. Arkin

Subject: Biology And Life Sciences, Biophysics Keywords: C-H...O Hydrogen bond; Isotope edited FTIR spectroscopy; Molecular dynamic simulation; Density functional theory

Online: 12 July 2024 (13:13:40 CEST)

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Preprint REVIEW | doi:10.20944/preprints201911.0204.v1

Graphene-Based Catalysts for Hydrogen Evolution Reaction

Lana Regent, Maximina Luis-Sunga, Elena Pastor, Gonzalo García

Subject: Chemistry And Materials Science, Electrochemistry Keywords: HER; graphene; catalysis; catalysts; electrolyser

Online: 17 November 2019 (13:28:21 CET)

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Preprint ARTICLE | doi:10.20944/preprints201906.0134.v1

Measurements of Gaseous Hydrogen-Nitrogen Laser-Plasma

Christian Parigger

Subject: Physical Sciences, Fluids And Plasmas Physics Keywords: atomic and molecular spectroscopy; time-resolved spectroscopy; laser plasma; laser-induced optical breakdown; stellar astrophysics spectra; white dwarf stars; hydrogen

Online: 14 June 2019 (15:01:44 CEST)

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Preprint ARTICLE | doi:10.20944/preprints201904.0261.v1

Reduction of Haematite Using Hydrogen Thermal Plasma

Masab Naseri Seftejani, Johannes Schenk, Michael Andreas Zarl

Subject: Engineering, Industrial And Manufacturing Engineering Keywords: hydrogen plasma; smelting reduction; iron oxide; plasma arc; degree of hydrogen utilization; degree of reduction; hematite; basicity

Online: 23 April 2019 (13:16:39 CEST)

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Preprint REVIEW | doi:10.20944/preprints201705.0038.v1

Hydrogen Storage Technologies for Smart Grids applications

Stavros Lazarou, Sofoklis Makridis

Subject: Engineering, Energy And Fuel Technology Keywords: smart grid; hydrogen; storage

Online: 4 May 2017 (08:40:29 CEST)

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Preprint ARTICLE | doi:10.20944/preprints202311.0240.v1

Fabrication of Lignin/Pbat Biodegradable Plastics Films via Reactive Extrusion and Their Thermal, Mechanical and Water Absorption Properties

Yanyan Dong, Weichang Gao, Zhenbao Luo, Heqing Cai, Aurore Richel, Jialei Liu, Yining Zhang, Zhichao Zhen, Wenqing He, Qi Liu

Subject: Chemistry And Materials Science, Materials Science And Technology Keywords: PBAT; Lignin; Biodegradable; film; fabrication; characterization

Online: 6 November 2023 (01:20:36 CET)

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Preprint ARTICLE | doi:10.20944/preprints202310.0138.v1

Multi-Frequency Differential Absorption LIDAR (DIAL) System for Aerosol and Cloud Retrievals of CO2/H2O and CH4/H2O

Jasper R Stroud, Gerd A Wagner, David F Plusquellic

Subject: Environmental And Earth Sciences, Atmospheric Science And Meteorology Keywords: DIAL; differential absorption lidar; IPDA; integrated path differential absorption LIDAR; cloud aerosol retrievals

Online: 3 October 2023 (09:35:01 CEST)

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