jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Seong-Hun Yu | Jong‐Hyuk Lee | Donghyun Yeo | Jun‐Hee Lee | Jin-Seok Bae | J S Sim
Source: Polymers (article, 2023-12-28)
Field: Materials Science — Polymers and Plastics

Analysis of Paint Properties According to Expandable Graphite and Fire Simulation Research on Firewall Penetration Part In this research, we attempted to develop paints that can be applied to various fields such as high-rise building structures and electric vehicle batteries. To minimize damage to life and property in the event of a fire, we attempted to manufacture a highly elastic paint material that can block flames and control smoke spread, and that has additional sound insulation and waterproofing functions. A high-elasticity paint was manufactured by mixing a flame-retardant polyurethane dispersion (PUD) with an acrylic emulsion binder and adding different mass fractions of expandable graphite (EG). The thermal, physical, and morphological properties of the prepared mixed paint were analyzed. The thermal properties of the mixed paint were analyzed and intended to be used as input data (heat transfer coefficient, specific heat capacity) for fire simulation. Output data were used to predict how much the temperature would change depending on the time of fire occurrence. The reason for conducting simulations on the fire stability of paint materials is that the fire stability of paints can be predicted without conducting fire tests. Two hours after the fire broke out, the thermal temperature distribution was analyzed. The temperature distribution was compared with and without mixed paint. Two hours after a fire broke out in a virtual space, it was found that when the mixed paint was applied, the surrounding temperature of the penetration area was lower than when the mixed paint was not applied. Development costs for developing excellent paints can be reduced. Since fire safety can be predicted without actually conducting tests, the time required for product development can be reduced. We are confident that this is a very groundbreaking technology because it allows fire safety simulations for developed products to be conducted in a virtual space by creating an environment similar to actual fire test standards. Materials science ; Composite material ; Waterproofing ; Overheating (electricity) ; Fire retardant ; Thermal insulation ; Graphite ; Combustion ; Penetration (warfare) ; Flammability ; Environmental science ; Forensic engineering ; Engineering Flame retardant materials and properties ; Fire dynamics and safety research ; Synthesis and properties of polymers
Authors: Mayur Akewar | Manoj B. Chandak
Source:  (review, 2023-12-06)
Field: Chemistry — Analytical Chemistry

Hyperspectral Imaging Algorithms and Applications: A Review &lt;p&gt;The paper covers topics ranging from hyperspectral imaging applications to innovative algorithms that have enhanced the analysis of hyperspectral data. We delve into the practical applications, including Agriculture, Food Quality and Safety, Earth Sciences, Exploration and Monitoring, Healthcare, Pharmaceuticals, Medical Imaging, Industrial Manufacturing, Management, Conservation, Safety and Security. Our goal is to provide a holistic understanding of how hyperspectral imaging is transforming these fields and driving new possibilities. We also discussed detailed algorithmic development in Hyperspectral Imaging including Supervised and Unsupervised algorithms. We reviewed algorithmic development from the early 1980’s to recent developments including Artificial Intelligence involving algorithms from Machine Learning to Deep Learning. We believe our paper will be of particular interest to your readers for those who wish to study algorithm development from simple image processing procedures to AI based approaches and how these algorithms are used in diverse applications to make intelligent decisions for increasing productivity and efficiency in Agriculture, Exploration and Management and identification of diseases and natural resources. Our paper is well organized into various sections as per algorithms and applications. We reviewed more than 250 papers with proper citations and authors' research work.&lt;/p&gt; Hyperspectral imaging ; Computer science ; Algorithm ; Artificial intelligence ; Identification (biology) ; Machine learning ; Data science Spectroscopy and Chemometric Analyses
Authors: Taraneh Javanbakht
Source: Acta Universitatis Sapientiae Electrical and Mechanical Engineering (article, 2023-12-01)
Field: Materials Science — Polymers and Plastics

Comparative Rheological Investigation of Nanocomposites of Surface Charged Superparamagnetic Iron Oxide Nanoparticles with Polyethylene Glycol Abstract This paper focuses on a new investigation of the rheological properties of the nanocomposites of surface charged superparamagnetic iron oxide nanoparticles with polyethylene glycol. Both studied nanocomposites showed the steady-state behavior at 20 °C and 40 °C. Moreover, the increase of viscosity versus shear strain, shear rate or time for the nanocomposites was small at 60 °C. The effect of the coating of nanoparticles with the polymer was comparable for different nanocomposites. The data presented in this paper can provide the required information for the preparation of assemblies of nanocomposites with polymers. Nanocomposite ; Materials science ; Polyethylene glycol ; Rheology ; Nanoparticle ; Polyethylene oxide ; Polymer ; Superparamagnetism ; Chemical engineering ; Polymer nanocomposite ; Polyethylene ; Composite material ; Oxide ; Nanotechnology ; Magnetization ; Metallurgy Polymer Nanocomposites and Properties ; Vibration Control and Rheological Fluids ; Rheology and Fluid Dynamics Studies
Authors: Giulia F. da Silva | Jorge Vanderlei da Conceição | Daiane T. da Silva | Everton Santos
Source: Advanced Materials Letters (article, 2023-08-28)
Field: Materials Science — Materials Chemistry

Automotive Plasma Painting Process This study investigates the deposition of hydrogenated diamond-like carbon (DLC) films on SAE 1045 alloy samples using a plasma-enhanced chemical vapor deposition (PECVD) system and evaluates their potential as automotive coatings. Copper doping was performed via a hollow copper cathode to examine its effects on the DLC films. The primary focus was to determine the structural properties, color variations, and friction resistance of the coated samples, with the goal of establishing their applicability in the automotive industry. Raman spectroscopy confirmed the successful deposition of DLC films, while energy dispersive X-ray spectroscopy (EDS) analysis demonstrated the variation in copper atom concentrations in the samples based on the sputtering duration during the doping process. The observed color changes in the DLC films correlated with the copper atom concentrations, with the interference phenomenon and refractive index differences between DLC films and copper proposed as the primary factors influencing color variations. Scratch tests were conducted to evaluate the resistance to friction and delamination of the coated materials compared to conventionally painted steel samples. The results indicated that the DLC-coated materials exhibited higher resistance, with an estimated 15% increase in delamination resistance. The enhanced resistance was hypothesized to result from the high hardness of DLC films and the potential accumulation of nanoparticles in the valleys of the sample surface, reducing irregularities. Materials science ; Copper ; Delamination (geology) ; Composite material ; Raman spectroscopy ; Sputtering ; Tribology ; Plasma-enhanced chemical vapor deposition ; Diamond-like carbon ; Deposition (geology) ; Metallurgy ; Chemical vapor deposition ; Nanotechnology ; Thin film ; Optics Diamond and Carbon-based Materials Research ; Metal and Thin Film Mechanics ; Lubricants and Their Additives
Authors: Petr A. Buikin | Анна В. Вологжанина | Аlexander А. Korlyukov
Source: Preprints.org (preprint, 2023-12-13)
Field: Chemistry — Organic Chemistry

1-(3-(2-(Dimethylammonio)ethyl)-1H-indol-5-yl)- N-Methylmethanesulfonamide Succinate Hemi(Ethanol Solvate) Sumatriptan is a serotonin receptor agonist approved by FDA in 1992 to treat migraines. Its’ solid form used in commercially available drugs Imitrex, Treximet, Onzetra Xsail and Zembrace symtouch is sumatriptan succinate. Herein we report on crystal structure of sumatriptane succinate hemi(ethanol solvate), HSum+·HSucc–·0.5EtOH, its comparison with previously reported solids containing derivatives of sumatriptan. Sumatriptan ; Ethanol ; Agonist ; Chemistry ; Pharmacology ; Combinatorial chemistry ; Receptor ; Stereochemistry ; Organic chemistry ; Medicine ; Biochemistry Coordination Chemistry and Organometallics ; Chemical Synthesis and Analysis ; Asymmetric Hydrogenation and Catalysis
Authors: Mustafa F. Mohammed | Mohammed A. Qasim
Source: Journal of Electrical Engineering (article, 2023-10-01)
Field: Materials Science — Materials Chemistry

Design of a battery charging system fed by thermoelectric generator panels using MPPT techniques Abstract Thermal energy is a renewable energy source to generate electrical energy that is not fully developed. One device that converts thermal energy into electrical power is a thermoelectric generator (TEG). TEGs are available as modules of various sizes and voltage levels. This paper is about the design of a battery charging system powered by a TEG panel. The TEG panel is implemented using 150 TEG modules interconnected in series and parallel. Its power is transferred to a battery using two stages of DC/DC converters. The 1 st stage is a Lou converter that is used for maximum power point tracking (MPPT) by a referenced perturb and observe (referenced P&amp;O) algorithm. The 2 nd stage is a bidirectional converter based on buck-boost modes of operation. The system is used to charge a 9 V 1.2 Ah battery. The proposed MPPT algorithm’s performance is compared with a traditional P&amp;O algorithm. The TEG panel provided 27.5 W at a Δ T of 30 0 C. The designed system is simulated in MATLAB SIMULINK. Maximum power point tracking ; Thermoelectric generator ; Battery (electricity) ; Maximum power principle ; Converters ; Computer science ; Photovoltaic system ; Electrical engineering ; Generator (circuit theory) ; Renewable energy ; Power (physics) ; Voltage ; MATLAB ; Buck converter ; Automotive engineering ; Thermoelectric effect ; Engineering ; Inverter ; Physics Advanced Thermoelectric Materials and Devices ; Advanced Battery Technologies Research ; Innovative Energy Harvesting Technologies
Authors: Yongqiang Wang | Tianyu Ma | Fengxiao Zhang | Jing Shang
Source: IET Science Measurement & Technology (article, 2023-08-21)
Field: Materials Science — Materials Chemistry

Properties of electrical tree resistance of silicone‐modified epoxy resin matrix composites Abstract In order to improve the electrical tree resistance of epoxy resin, composites were prepared using dihydroxydiphenylsilane and a novel silicone modifier modified epoxy resin and micron silica, and the composites were subjected to accelerated thermal aging test and electrical tree test and recorded the growth process of electrical trees to further obtain the characteristic parameters of electrical trees in the experimental samples. The results show that the silicone‐modified epoxy resin/silica composite has better thermal stability and electrical tree resistance than the unmodified epoxy resin/silica composite and pure epoxy resin. Analysis of the scanning electron microscope (SEM) and breakdown field strength results show that the introduction of the modifier enhanced interfacial properties between the epoxy resin and silica. At the end of the electrical tree test, the length of the electrical tree in the silicone‐modified epoxy resin/silica composite was at a minimum 25.31% of the length of the electrical tree in the unmodified epoxy resin/silica composite with the same silica filling ratio, and 9.19% of the length of the electrical tree in the pure epoxy, while the electrical trees in the silicone‐modified epoxy resin/silica composite have lower expansion factors, as well as higher fractal dimensions, compared to those in the resin without added silica. Epoxy ; Materials science ; Composite material ; Silicone ; Gelcoat ; Composite number ; Composite epoxy material ; Thermal stability ; Electrical resistance and conductance ; Scanning electron microscope ; Chemical engineering High voltage insulation and dielectric phenomena ; Smart Materials for Construction ; Advanced Sensor and Energy Harvesting Materials
Authors: Jawad Hadid | Matias Rodrigues | Abdelmounaïm Harouri | Christophe Dupuis | David Bouville | Antoine Martin | M. Loidl | L. Ferlazzo
Source: Micro and Nano Engineering (article, 2023-07-10)
Field: Materials Science — Materials Chemistry

Detachable three-layer Au absorber microfabrication for low-temperature detectors Low temperature detectors (LTDs) used for decay energy spectrometry (DES) can provide accurate and reliable decay data thanks to their high-energy resolution and a near 100% detection efficiency for the radiations of interest. However, it is essential to consider the source quality to mitigate spectral distortion due to the self-absorption of particle energy in the source deposited. This work aimed to produce a replaceable 4π 3-layer gold absorber for DES in reusable metallic magnetic calorimeters, a class of LTDs. We present a novel 3-layer microfabrication process for a 1 mm diameter absorber with a total gold thickness ranging from 20 μm to 120 μm depending on the measured radionuclide (55Fe or 241Am). The absorber integrates a gold nanofoam in which the radionuclide is deposited by nanodrop deposition of a few tenths of μL of a radioactive solution. We fabricated a high quality gold nanofoam layer with controllable porosity through a dealloying process using wet etching and integrating it on a thick electrodeposited gold layer. The fine study of the nanofoam microfabrication is performed using high-resolution scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDX). Materials science ; Microfabrication ; Layer (electronics) ; Scanning electron microscope ; Optoelectronics ; Composite material ; Nanotechnology Nanoporous metals and alloys ; Anodic Oxide Films and Nanostructures ; Electrocatalysts for Energy Conversion
Authors: Ioannis Katsantonis | Maria Manousidaki | Anastasios D. Koulouklidis | Christina Daskalaki | Ioannis Spanos | Constantinos Kerantzopoulos | Anna C. Tasolamprou | Costas M. Soukoulis | E. N. Economou | Stelios Tzortzakis | Maria Farsari | Maria Kafesaki
Source: arXiv (Cornell University) (preprint, 2023-02-16)
Field: Materials Science — Electronic, Optical and Magnetic Materials

Strong and Broadband Pure Optical Activity in 3D Printed THz Chiral Metamaterials Optical activity (polarization rotation of light) is one of the most desired features of chiral media, as it is important for many polarization related applications. However, in the THz region, chiral media with strong optical activity are not available in nature. Here, we study theoretically, and experimentally a chiral metamaterial structure composed of pairs of vertical U-shape resonators of "twisted" arms, and we reveal that it demonstrates large pure optical activity (i.e. optical activity associated with negligible transmitted wave ellipticity) in the low THz regime. The experimental data show polarization rotation up to 25 (deg) for an unmatched bandwidth of 1 THz (relative bandwidth 80 %), from a 130 um-thickness structure, while theoretical optimizations show that the rotation can reach 45 (deg). The enhanced chiral response of the structure is analyzed through an equivalent RLC circuit model, which provides also simple optimization rules for the enhancement of its chiral response. The proposed chiral structures allow easy fabrication via direct laser writing and electroless metal plating, making them suitable candidates for polarization control applications. Optical rotation ; Metamaterial ; Terahertz radiation ; Broadband ; Polarization (electrochemistry) ; Materials science ; Optoelectronics ; Specific rotation ; Resonator ; Circular polarization ; Optics ; Physics ; Chemistry Metamaterials and Metasurfaces Applications ; Liquid Crystal Research Advancements ; Advanced Antenna and Metasurface Technologies
Authors: Ronan Sangouard | Ivo Freudenberg | Maximilian Kertel
Source: World Electric Vehicle Journal (article, 2023-08-15)
Field: Materials Science — Materials Chemistry

Computer Vision for DC Partial Discharge Diagnostics in Traction Battery Systems The tendency towards thin insulation layers in traction battery systems presents new challenges regarding insulation quality and service life. Phase-resolved DC partial discharge diagnostics can help to identify defects. Furthermore, different root causes are characterized by different patterns. However, to industrialize the procedure, there is the need for an automatic pattern recognition system. This paper shows how methods from computer vision can be applied to DC partial discharge diagnostics. The derived system is self-learning, needs no tedious manual calibration, and can identify defects within a matter of seconds. Thus, the combination of computer vision and phase-resolved DC partial discharge diagnostics provides an industrializable system for detecting insulation faults and identifying their root causes. Partial discharge ; Computer science ; Insulation system ; Battery (electricity) ; Traction (geology) ; Traction substation ; Automotive engineering ; Electrical engineering ; Voltage ; Engineering ; Mechanical engineering ; Physics High voltage insulation and dielectric phenomena ; Power Transformer Diagnostics and Insulation ; Advanced Battery Technologies Research
Authors: Dewi Agustiningsih | Yuichi Κamiya | Nuryono Nuryono | Sri Juari Santosa | Eko Sri Kunarti
Source: SSRN Electronic Journal (preprint, 2023-01-01)
Field: Chemistry — Organic Chemistry

Fixing Ni2+ Onto Mesoporous Sio2-Tio2 Through Amino Silane and Application as a Catalyst for Kumada Cross Coupling Reaction for 1,1’-Biphenyl Synthesis Biphenyl ; Catalysis ; Mesoporous material ; Silane ; Coupling (piping) ; Coupling reaction ; Materials science ; Chemistry ; Organic chemistry ; Metallurgy Catalytic Cross-Coupling Reactions ; Organoboron and organosilicon chemistry ; Chemical Synthesis and Reactions
Authors: Bikash Shrestha | Rajesh Prakash Guragain | Binita Sedhai | Hom Bahadur Baniya | Ujjwal Man Joshi | Deepak Prasad Subedi
Source: Bibechana (article, 2023-07-24)
Field: Materials Science — Surfaces, Coatings and Films

Surface modification of nylon 6 by 50 Hz dielectric barrier discharge Produced in air and argon at atmospheric pressure This paper reports the use of dielectric barrier discharge (15.65 kV, 50 Hz) produced in an air and argon environment at atmospheric pressure to modify the surface of Nylon 6. Power dissipation in air and argon DBD was determined to be 14.60 W and 12.00 W, respectively. Similarly, the average density and temperature of an electron in air DBD were found to be 1.74 ×1011 cm-3 and 1.31 eV, respectively, while the values were 2.50 ×1011 cm-3 and 0.68 eV in argon DBD. The water contact angle (WCA) was measured to confirm the enhancement in wettability. On treating the sample with air DBD for 15 minutes, the contact angle reduced from 134.07° ± 3.20° to 89.11° ± 3.06° while it was reduced to 82.74° ± 4.20° within 1 minute using argon. The study found that treating a hydrophobic sample of Nylon 6 with DBD for a certain period of time transformed it into a hydrophilic one, and extending the treatment time further enhanced its wettability. The use of argon DBD was found to be more effective than air DBD in altering the surface properties of the sample, as the sample became hydrophilic after only one minute of treatment with argon DBD and completely wettable after three minutes. The findings suggest that air and argon DBD have potential applications in modifying the surface properties of Nylon 6, which could have practical implications in the production of textiles, membranes, and other materials. Dielectric barrier discharge ; Argon ; Wetting ; Atmospheric pressure ; Contact angle ; Analytical Chemistry (journal) ; Materials science ; Dielectric ; Chemistry ; Composite material ; Chromatography ; Organic chemistry ; Optoelectronics ; Meteorology Surface Modification and Superhydrophobicity ; Electrohydrodynamics and Fluid Dynamics ; Plasma Applications and Diagnostics
Authors: Anggara Trisna Nugraha | Moch Fadhil Ramadhan | Muhammad Jafar Shiddiq | Muhammad Fikri Fathurrohman
Source: JEEMECS (Journal of Electrical Engineering Mechatronic and Computer Science) (article, 2023-08-10)
Field: Materials Science — Materials Chemistry

Comparison of Insulated Switch Gear with Desiccant Addition to SF6 Gas Quality System at Waru Substation In electrical instrumentality with SF6 gas insulation, the quality of SF6 gas in line with the standard is prime to wise insulation power, if there' a decrease in gas quality, there'll even be a decrease among the number of voltage insulation on electrical equipment. throughout this case, it had been found that the quality of SF6 gas was deteriorating within the Ganz whole GIS Compartment at the Waru Substation Substaction, specifically the position level of the SF6 isolation gas that exceeded the required standard limit. Besides, this GIS isn't equipped with silica gel/desiccant as a condition gripping material and gas sorbent material from amendment PMT (IEEE Std 11251993) that ends throughout a decrease among the standard of SF6 gas. The addition of drier among the GIS is needed to keep up the quality of SF6 gas. These materials are analyzed for quantity and performance once applied within the compartment therefore as that deterioration of the quality of SF6 gas and thus the prevalence of insulation failure is avoided as early as possible, and SF6 remains in its characteristics with a BDV of 78.6 kV/cm (according to SF6 crucial Breakdown Volatge). And it hoped that SF6 gas will add line with it operate as a decent insulating medium. As degree application, a drier experiment has been administered among the GIS compartment at the Waru Substation station Sulfur hexafluoride ; Dielectric gas ; Environmental science ; Nuclear engineering ; Materials science ; Automotive engineering ; Forensic engineering ; Electrical engineering ; Composite material ; Engineering ; Chemistry High voltage insulation and dielectric phenomena ; Thermal Analysis in Power Transmission ; Power Systems and Technologies