jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: Harrison Shagwira | Japheth Obiko | Fredrick Madaraka Mwema | Tien‐Chien Jen
Source: MATEC Web of Conferences (article, 2023-01-01)
Field: Materials Science — Materials Chemistry

Simulation of deformation behaviour of Aluminium 7075 during Equal Channel Angular Pressing (ECAP) This paper presents a finite element simulation of equal channel angular pressing (ECAP) since it is one of the most common and successful severe plastic deformation techniques. This study reports the influence of the most significant factors influencing the ECAP technique. Through finite element simulation, the effect of the die geometry, workpiece geometry, and the pressing speed on the effective strain distributions, damage, and pressing loads, were investigated. The influence of the ECAP method on different material models is also presented. Additionally, the prospective expansion and future applications of ECAP are herein highlighted. From the results, the die geometry of a 90° channel imparts the highest strains during ECAP. Additionally, specimens of rectangular geometry are susceptible to cracking and damage as compared to circular samples. It was found that very high processing speeds (&gt;7mm/sec) are undesirable during ECAP since they cause very high internal stresses to the structure of the workpieces. Besides, processing at room temperature can achieve homogeneous strain distribution with minimum sample damage. Pressing ; Materials science ; Severe plastic deformation ; Aluminium ; Die (integrated circuit) ; Finite element method ; Cracking ; Deformation (meteorology) ; Homogeneous ; Composite material ; Metallurgy ; Channel (broadcasting) ; Plasticity ; Structural engineering ; Engineering Microstructure and mechanical properties ; Metal Forming Simulation Techniques ; Aluminum Alloys Composites Properties
Authors: Yuki Imazu | Kazuyuki Mitsukura
Source: Journal of Photopolymer Science and Technology (article, 2023-06-15)
Field: Materials Science — Polymers and Plastics

Hybrid Bonding Technology Utilizing Molding Compound and Photo Imageable Dielectric Systems Currently, high-density semiconductor packages have been required to satisfy the demands of realizing high-performance computing network systems. Hybrid bonding is one of the promising processes for 3D-IC package utilizing WoW (wafer on wafer), CoW (chip on wafer) to realize fine vertical interconnection by die stacking. However, the current fabrication processes and materials for hybrid bonding are based on the front-end based technology such as dry processes and Si-based inorganic materials. In this paper, we demonstrated a novel hybrid bonding system using organic materials especially for Epoxy Molding Compound (EMC) and Photo Imageable Dielectric (PID) which are frequently applied to Fan-Out WLP (Wafer Level Package) and PLP (Panel Level Package) with CMP, UV modification and thermal annealing processes. Materials science ; Dielectric ; Molding (decorative) ; Composite material ; Nanotechnology ; Optoelectronics Synthesis and properties of polymers ; 3D IC and TSV technologies ; Nanofabrication and Lithography Techniques
Authors: Ching Ching Lam | Jonathan M. Goodman
Source: ChemRxiv (preprint, 2023-06-18)
Field: Chemistry — Organic Chemistry

Reaction dynamics as the missing puzzle piece: the origin of selectivity in oxazaborolidinium ion-catalysed reactions The selectivity in a group of oxazaborolidinium ion-catalysed reactions between aldehyde and diazo compounds cannot be explained using transition state theory. VRAI-selectivity, developed to predict the outcome of dynamically controlled reactions, can account for both the chemo- and the stereo-selectivity in these reactions, which are controlled by reaction dynamics. Subtle modifications to the substrate or catalyst substituents alter the potential energy surface, leading to changes in predominant reaction pathways and altering the barriers to the major product when reaction dynamics are considered. In addition, this study suggests an explanation for the mysterious inversion of enantioselectivity resulting from the inclusion of an ortho iPrO group in the catalyst. Selectivity ; Catalysis ; Diazo ; Chemistry ; Aldehyde ; Ion ; Substrate (aquarium) ; Photochemistry ; Potential energy surface ; Transition state ; Computational chemistry ; Combinatorial chemistry ; Organic chemistry ; Ab initio Cyclopropane Reaction Mechanisms ; Molecular Junctions and Nanostructures ; Ionic liquids properties and applications
Authors: Hugo Laffolley | Christophe Journeau | Bernd Grambow
Source: Research Square (preprint, 2023-12-28)
Field: Materials Science — Materials Chemistry

Origin and generation mechanism of type-A Cs-bearing microparticles from Fukushima Daiichi Abstract The Fukushima Daiichi accident resulted in the release of a novel form of radioactive Cs contamination into the environment, called Cs-bearing microparticles (CsMP). CsMPs constitute a substantial portion of the radioactive pollution near the nuclear power station and traveled beyond several hundred kilometers. Extensive characterization of the CsMPs revealed an amorphous silica matrix, along with Cs and other minor or trace elements such as Fe and Zn. This study explores the unclear generation mechanism of CsMPs by conducting experimental molten core concrete interactions (MCCI) as a source of Si and analyzing the resultant aerosols. The findings demonstrate that MCCI is in capacity to produce spherical submicronic and micronic particles, primarily composed of amorphous silica and incorporating elements akin to CsMPs. A humid atmosphere is found to favour an even closer chemical composition. Examination of the internal structure of the synthesized particles unveils numerous crystalline nanoinclusions, similar to those observed in CsMPs, possibly serving as nucleation sites for CsMP formation through the condensation of Si-rich vapors. Nucleation ; Amorphous solid ; Amorphous silica ; Atmosphere (unit) ; Chemical engineering ; Condensation ; Materials science ; Pollution ; Contamination ; Environmental chemistry ; Environmental science ; Chemistry ; Crystallography ; Meteorology ; Organic chemistry ; Physics Nuclear materials and radiation effects ; Graphite, nuclear technology, radiation studies ; Nuclear and radioactivity studies
Authors: Somar Shekh Alshabab | Bernd Markert | Franz Bamer
Source: PAMM (article, 2023-10-16)
Field: Materials Science — Materials Chemistry

Statistical analysis of fracture of silica glass using molecular dynamics Abstract Disordered solids exhibit intermittent avalanches when slowly driven by an external load. These avalanches are associated with plastic rearrangements of the atoms at the nanoscale that manifest as stress and energy drops in the loading curve. The complexity arising from their interactions through long‐range elastic fields and the disorder makes statistical approaches suitable for studying their behavior by considering yielding and fracture as a phase transition. To investigate the avalanche statistics, we perform nanoscale simulations using the athermal quasistatic deformation protocol to induce fracture to silica glass samples, which were simulated using the melting‐quenching technique. We identify and measure the avalanches and voids and investigate their evolution in the process of fracture. Our results confirm that the avalanches exhibit scale‐free power law statistics, indicative of a critical phenomenon. Quasistatic process ; Fracture (geology) ; Materials science ; Molecular dynamics ; Nanoscopic scale ; Deformation (meteorology) ; Quenching (fluorescence) ; Stress (linguistics) ; Power law ; Dynamics (music) ; Statistical physics ; Mechanics ; Composite material ; Physics ; Thermodynamics ; Nanotechnology ; Statistics ; Optics ; Mathematics Material Dynamics and Properties ; Theoretical and Computational Physics ; Glass properties and applications
Authors: Qiaoqiao Yang | Wei Ding
Source: Advances in Economics and Management Research (article, 2023-06-12)
Field: Materials Science — Polymers and Plastics

Research on the intelligent security clothing design method for the Internet In the development of modern economic construction, the intelligent technological means of clothing design has become the core topic discussed by manufacturing enterprises. Although the main trend and related problems of the design mode are still fuzzy, with the continuous improvement of science and technology level, the clothing design with network technological means as the core has become the focus of the manufacturing industry, which can not only simulate the perception of life system, A dual feedback mechanism with clothing sensing technology as the core can also be constructed. Therefore, on the basis of understanding the research status of Internet-based intelligent safety clothing design technology, this paper mainly studies the application effect of intelligent safety clothing design method in the new era according to the structure and application of intelligent safety clothing design, in order to provide technical basis for the innovation and development of clothing manufacturing industry in the new era. Clothing ; The Internet ; Manufacturing engineering ; Clothing industry ; Architectural engineering ; Dual (grammatical number) ; Computer science ; Order (exchange) ; Engineering ; Engineering management ; Systems engineering ; Business ; World Wide Web Textile materials and evaluations ; Digital Media and Visual Art
Authors: Siyuan Sun | Zhenxiang Zheng | Jun Wang | Fengming Li | An He | Ruijun Tian | Chris Soon Heng Tan
Source: bioRxiv (Cold Spring Harbor Laboratory) (preprint, 2023-02-14)
Field: Chemistry — Spectroscopy

Improved <i>in situ</i> Characterization of Proteome-wide Protein Complex Dynamics with Thermal Proximity Co-Aggregation Abstract Vast majority of cellular activities are carried out by protein complexes that assembled dynamically in response to cellular needs and environmental cues. Large scale efforts had uncovered a large repertoire of functionally uncharacterized protein complexes which necessitate new strategies to delineate their roles in various cellular activities and diseases. Thermal proximity co-aggregation profiling could be readily deployed to simultaneously characterize the dynamics for hundreds to thousands of protein complexes in situ across different cellular conditions. Toward this goal, we had optimized the original method both experimentally and computationally. In this new iteration termed Slim-TPCA, fewer temperatures are used which increase throughputs by over 3X, while coupled with new scoring metrics and statistical evaluation resulted in minimal compromise in coverage and the detection of more relevant protein complexes. Overall, less samples are needed, false positives from batch effects are minimized and statistical evaluation time is reduced by two orders of magnitude. We applied Slim-TPCA to profile state of protein complexes in K562 cells under different duration of glucose deprivation. More protein complexes are found dissociated based on TPCA signature in accordance with expected downregulation of most cellular activities. These complexes include 55S ribosome and various respiratory complexes in mitochondria revealing the utility of TPCA to study protein complexes in organelles. On other hand, protein complexes involved in protein transport and degradation are found increasingly associated revealing their involvement in metabolic reprogramming during glucose deprivation. In summary. Slim-TPCA is an efficient strategy for proteome-wide characterization of protein complexes. The various algorithmic improvement of Slim-TPCA is available as Python package at https://pypi.org/project/Slim-TPCA/ Proteome ; Computational biology ; False positive paradox ; Proteomics ; Protein aggregation ; In situ ; Protein degradation ; Chemistry ; Cell biology ; Biophysics ; Biology ; Computer science ; Biochemistry ; Artificial intelligence Advanced Proteomics Techniques and Applications ; Microbial Metabolic Engineering and Bioproduction ; RNA and protein synthesis mechanisms
Authors: I N Todor | N Yu Lukianova | M. A. Primin | Igor Nedayvoda | В Ф Чехун
Source: Experimental Oncology (article, 2023-02-21)
Field: Materials Science — Biomaterials

BIOMAGNETISM OF DRUG-SENSITIVE AND DRUG-RESISTANT MALIGNANT TUMORS AFTER INJECTION OF FERROMAGNETIC NANOCOMPOSITE The use of SQUID-magnetometry with ferromagnetic nanoparticles as a contrast agent is a promising approach for visualization of malignant neoplasms with varying sensitivity to chemotherapy. Squid ; Doxorubicin ; Biomagnetism ; Cisplatin ; Magnetometer ; Magnetic nanoparticles ; Cancer research ; Gradiometer ; Ferromagnetism ; Chemotherapy ; Materials science ; Magnetism ; Medicine ; Biomedical engineering ; Internal medicine ; Biology ; Nanotechnology ; Magnetic field ; Nanoparticle ; Condensed matter physics ; Physics Nanoparticle-Based Drug Delivery ; Chemical Reactions and Isotopes
Authors: Chris Chapman | Kemal Ramić | Goran Arbanas | Jesse Brown | А. И. Колесников | M. B. Stone | Luke L. Daemen | Yongqiang Cheng | Anibal J. Ramirez‐Cuesta | Yaron Danon | Dominik Fritz
Source:  (article, 2023-02-23)
Field: Materials Science — Polymers and Plastics

Applying Methodology for Evaluating and Validating TSLs to Materials of Interest to NCSP [Slides] This presentation covers the topic of applying methodology for evaluation validation of TSLs to material of interest to the Nuclear Criticality Safety Program (NCSP). The talk covers recent efforts in validating thermal neutron scattering cross sections. The presentation also proposes a methodology for not only validating thermal scattering files that utilizes all available experimental data, but also for evaluating new libraries as demonstrated on Polystyrene and Lucite Computer science ; Artificial intelligence Synthesis and properties of polymers ; Corrosion Behavior and Inhibition
Authors: Nemailal Tarafder
Source:  (review, 2023-06-26)
Field: Materials Science — Polymers and Plastics

A Review on Spinning Processing with Automation Fibre and yarn processing and fabric manufacturing are the two division of textile industry. Electronic controls systems are functioning for optimal running with all machines under proper supervising in step wise improvement in each yarn manufacturing process. Modern automation techniques can manufacture in the textile processing to achieve greater number of smaller manufacturers, who can produce smaller organization to produce cost-effective and quick delivery products. Automation Solutions have their new generation of product lines for expert engineers to serve automation solutions for the whole of the value chain. With the installation of Rieter Automation Solutions from blow room to final packaged yarns, it reduces the number of personnel. Present day automation is used in yarn manufacturing from bale management to processing of cone winding. On one of the major key objectives in textile manufacturing is to improve quality and cost competitiveness. At present, spinning is one of the most applied areas where automation is successful in manufacturing processes. Voltas offers the wide range of machines in spinning processing for products as needed by the spinning industry. Automation ; Spinning ; Manufacturing engineering ; Yarn ; Textile ; Quality (philosophy) ; Engineering ; Process (computing) ; Textile industry ; Product (mathematics) ; Computer science ; Process engineering ; Mechanical engineering ; Materials science ; Mathematics Textile materials and evaluations ; Industrial Vision Systems and Defect Detection
Authors: Oleg Dyshyn | I. A. Habibov | Arzu Suleymanova Arzu Suleymanova | Sevinc Malik Abasova | Rauf Malikov | Tamila Uzeyir Khankishiyeva
Source: The Scientific Issues of Ternopil Volodymyr Hnatiuk National Pedagogical University Series pedagogy (article, 2023-04-30)
Field: Materials Science — Polymers and Plastics

Ідентифікація механізму формування природного нанокомпозиту в полімерних композитних матеріалах The object of the study is the sealing elements of the packer. The fundamental principle of the cluster model is the assumption that the sum of the relative volume fractions of two structural elements of a natural nanocomposite (loosely packed matrix and nanoclusters) is equal to one – This approach is incorrect because it is violated when the nanoclusters are immersed in a loosely packed matrix. In this regard, a new relationship is proposed that relates the relative volume fractions of the loosely packed matrix and the part of nanoclusters immersed in it – Calculation formulas are obtained for the relative fractions of the loosely packed matrix and the interphase region. The paper shows that such an assumption is unfounded due to the indispensable immersion of clusters in a loosely packed matrix, and in this regard, a new relationship is proposed linking the relative volume fractions of the loosely packed matrix and the part of nanoclusters immersed in it. For a composite with a matrix, a mixture of synthetic butadiene nitrile and hydrogenated butadiene nitrile rubber and the addition of a copper nanoparticle, it is shown that in a natural nanocomposite, which is the polymer under study in an amorphous state, the time dependences of the relative volume fractions of the regions of inter-component adhesion and the loosely packed matrix coincide quite well with each other. The application of the above relationship between the volume fractions of a loosely packed matrix and nanoclusters allows to reformulate the known equations of parallel and sequential micromechanical models, as well as the Kerner equation for a more complex micromechanical model used to describe the effect of strengthening the elastic modulus of nanocomposites Nanoclusters ; Packed bed ; Matrix (chemical analysis) ; Volume (thermodynamics) ; Polymer ; Volume fraction ; Natural rubber Polymer Nanocomposites and Properties ; Elasticity and Wave Propagation ; Advanced Theoretical and Applied Studies in Material Sciences and Geometry
Authors: Oleg Dyshyn | Ibrahim Habibov | Arzu Suleymanova Arzu Suleymanova | Sevinc Malik Abasova | Rauf Malikov | Tamila Uzeyir Khankishiyeva
Source: Eastern-European Journal of Enterprise Technologies (article, 2023-04-30)
Field: Materials Science — General Materials Science

Identifying of the mechanism formation of a natural nanocomposite in polymer composite materials The object of the study is the sealing elements of the packer. The fundamental principle of the cluster model is the assumption that the sum of the relative volume fractions of two structural elements of a natural nanocomposite (loosely packed matrix and nanoclusters) is equal to one – This approach is incorrect because it is violated when the nanoclusters are immersed in a loosely packed matrix. In this regard, a new relationship is proposed that relates the relative volume fractions of the loosely packed matrix and the part of nanoclusters immersed in it – Calculation formulas are obtained for the relative fractions of the loosely packed matrix and the interphase region. The paper shows that such an assumption is unfounded due to the indispensable immersion of clusters in a loosely packed matrix, and in this regard, a new relationship is proposed linking the relative volume fractions of the loosely packed matrix and the part of nanoclusters immersed in it. For a composite with a matrix, a mixture of synthetic butadiene nitrile and hydrogenated butadiene nitrile rubber and the addition of a copper nanoparticle, it is shown that in a natural nanocomposite, which is the polymer under study in an amorphous state, the time dependences of the relative volume fractions of the regions of inter-component adhesion and the loosely packed matrix coincide quite well with each other. The application of the above relationship between the volume fractions of a loosely packed matrix and nanoclusters allows to reformulate the known equations of parallel and sequential micromechanical models, as well as the Kerner equation for a more complex micromechanical model used to describe the effect of strengthening the elastic modulus of nanocomposites Nanoclusters ; Nanocomposite ; Matrix (chemical analysis) ; Polymer ; Materials science ; Composite material ; Nanoparticle ; Composite number ; Amorphous solid ; Volume fraction ; Natural rubber ; Cluster (spacecraft) ; Chemical engineering ; Chemistry ; Nanotechnology ; Crystallography ; Computer science Material Properties and Applications ; Advanced Theoretical and Applied Studies in Material Sciences and Geometry ; Polymer Science and Applications
Authors: Ammar Hassan
Source:  (review, 2023-09-06)
Field: Materials Science — Polymers and Plastics

A CRITICAL REVIEW OF EXPERIMENTS AND ANALYSIS OF ADHESIVE BONDED COMPONENTS AT ELEVATED SPEEDS TO STUDY THEIR IMPACT BEHAVIOR AND JOINT RESPONSES UNDER EXTREME CONDITIONS A CRITICAL REVIEW OF EXPERIMENTS AND ANALYSIS OF ADHESIVEBONDED COMPONENTS AT ELEVATED SPEEDS TO STUDY THEIR IMPACTBEHAVIOR AND JOINT RESPONSES UNDER EXTREME CONDITIONS Joint (building) ; Adhesive ; Materials science ; Structural engineering ; Composite material ; Forensic engineering ; Engineering Textile materials and evaluations ; Tribology and Wear Analysis
Authors: Yedan Shen | Ting Wang | Jie Zhou | Guanghui Hu
Source: arXiv (Cornell University) (preprint, 2023-03-07)
Field: Materials Science — Materials Chemistry

A convergence analysis of a structure-preserving gradient flow method for the all-electron Kohn-Sham model In [Dai et al, Multi. Model. Simul., 2020], a structure-preserving gradient flow method was proposed for the ground state calculation in Kohn-Sham density functional theory, based on which a linearized method was developed in [Hu, et al, EAJAM, accepted] for further improving the numerical efficiency. In this paper, a complete convergence analysis is delivered for such a linearized method for the all-electron Kohn-Sham model. Temporally, the convergence, the asymptotic stability, as well as the structure-preserving property of the linearized numerical scheme in the method is discussed following previous works, while spatially, the convergence of the h-adaptive mesh method is demonstrated following [Chen et al, Multi. Model. Simul., 2014], with a key study on the boundedness of the Kohn-Sham potential for the all-electron Kohn-Sham model. Numerical examples confirm the theoretical results very well. Kohn–Sham equations ; Convergence (economics) ; Stability (learning theory) ; Flow (mathematics) ; Applied mathematics ; Balanced flow ; Mathematics ; Electron ; Density functional theory ; Physics ; Computer science ; Mathematical analysis ; Geometry ; Quantum mechanics Catalytic Processes in Materials Science ; Advanced Chemical Physics Studies ; nanoparticles nucleation surface interactions