jablonkagroup/rise_ai_scientists huggingface dataset:
Authors: David Santiago González Burgos | Miguel Ángel Pinto Romero | Joan Sebastián Guerrero Rincón | J. Gállego | Ómar Ernesto Torres Ladino
Source: Encuentro Internacional de Educación en Ingeniería (article, 2023-09-11)
Field: Chemistry — Analytical Chemistry

Desarrollo de una metodología computacional para tratamiento y caracterización de imágenes de tipo agroindustrial La búsqueda en las mejoras de producción de café en el departamento de Cundinamarca ha generado un creciente interés en el desarrollo de metodologías de evaluación de parámetros de calidad en el proceso de cultivo y postcosecha del grano. En el contexto tradicional, el análisis de calidad se desarrolla mediante inspección visual y procesos químicos, los cuales pueden resultar inoportunos e insuficientes. En este sentido, las técnicas de reconocimiento de imágenes actuales se destacan por ser herramientas rápidas, confiables y económicas para la evaluación de calidad y detección de irregularidades en productos alimenticios, ya que permiten caracterizar y cuantificar de forma simultánea distintas propiedades fisicoquímicas de una muestra a través de su firma espectral. Se presenta aquí un enfoque basado en técnicas de reconocimiento de imágenes y visión por computador para la identificación de características y objetos en archivos RGB. El desarrollo de este proyecto tiene un enfoque innovador ya que la caracterización computacional de imágenes se presenta como una solución para la caracterización de parámetros de interés en alimentos. Además, es una metodología de fácil y rápido acceso, que permite desarrollar diagnósticos preventivos y estudios en campo con la proyección de optimizar los tiempos de producción para satisfacer la demanda alimentaria. Humanities ; Physics ; Art Spectroscopy and Chemometric Analyses
Authors: Nasr M. El‐Abasawy | Ahmed El‐Olemy | Mohamed Sharaf El Din
Source: Journal of Advanced Pharmacy Research (article, 2023-10-01)
Field: Chemistry — Analytical Chemistry

Simultaneous Spectrophotometric Determination of Alogliptin and Pioglitazone Using Partial Least Squares with and without Genetic Algorithm Background: Partial least squares-1 (PLS) is a common simple, rapid and selective multivariate method for simultaneous determination of components having overlapping spectra in mixtures. Objectives: In the present study, a simple and sensitive chemometric procedure was suggested for the selective determination of alogliptin and pioglitazone without previous separation in pharmaceutical preparation using this powerful multivariate technique with and without variable selection (genetic algorithm). PLS method was run on the calibration data of absorption spectra. Pre-processing of the data was done and the regions below 215 nm and above 290 nm were rejected due to non-linearity, this results in 75 variable. Results: Genetic algorithm reduced absorbance matrix to about 61-56% of the original matrix (46 and 42 variables for alogliptin and pioglitazone, respectively). The selected variables were used for running the partial least squares model. Conclusion: A comparison between partial least squares and genetic algorithm- partial least squares models was done and the predictive ability of both models were evaluated. Pioglitazone ; Alogliptin ; Partial least squares regression ; Genetic algorithm ; Algorithm ; Mathematics ; Computer science ; Statistics ; Internal medicine ; Medicine ; Mathematical optimization ; Endocrinology ; Diabetes mellitus Analytical Methods in Pharmaceuticals ; Analytical Chemistry and Chromatography ; Natural Products and Biological Research
Authors: Baowei Xu | Boxun Li | Siyu Tian
Source: Highlights in Science Engineering and Technology (article, 2023-03-29)
Field: Chemistry — Analytical Chemistry

Glass classification and identification based on lasso regression and K-means clustering Ancient glass is classified into two types, high potassium glass and lead-barium glass, which are highly susceptible to weathering by the burial environment. In order to protect the glass artifacts more safely, based on some data related to the chemical composition ratio of glass artifacts,by the lasso regression model based on the logit transformation, the classification rules of high potassium and lead-barium glass were analyzed, and the glass was divided into four subclasses based on the principal component analysis using K-means clustering, and sensitivity analysis was performed on the classification results. Finally, the validity of the model was verified by determining the type of glass to which a set of test data belonged. Barium ; Principal component analysis ; Cluster analysis ; Regression analysis ; Identification (biology) ; Regression ; Mineralogy ; Logistic regression ; Mathematics ; Artificial intelligence ; Pattern recognition (psychology) ; Materials science ; Statistics ; Computer science ; Geology ; Metallurgy Spectroscopy and Chemometric Analyses ; Remote Sensing and Land Use ; Advanced Algorithms and Applications
Authors: Elena Giammatteo | Alexander Heinlein | Matthias Schlottbom
Source: arXiv (Cornell University) (preprint, 2023-03-12)
Field: Materials Science — Electronic, Optical and Magnetic Materials

An extension of the approximate component mode synthesis method to the heterogeneous Helmholtz equation In this work we propose and analyze an extension of the approximate component mode synthesis (ACMS) method to the heterogeneous Helmholtz equation. The ACMS method has originally been introduced by Hetmaniuk and Lehoucq as a multiscale method to solve elliptic partial differential equations. The ACMS method uses a domain decomposition to separate the numerical approximation by splitting the variational problem into two independent parts: local Helmholtz problems and a global interface problem. While the former are naturally local and decoupled such that they can be easily solved in parallel, the latter requires the construction of suitable local basis functions relying on local eigenmodes and suitable extensions. We carry out a full error analysis of this approach focusing on the case where the domain decomposition is kept fixed, but the number of eigenfunctions is increased. The theoretical results in this work are supported by numerical experiments verifying algebraic convergence for the method. In certain, practically relevant cases, even exponential convergence for the local Helmholtz problems can be achieved without oversampling. Helmholtz equation ; Domain decomposition methods ; Mathematics ; Partial differential equation ; Helmholtz free energy ; Applied mathematics ; Component (thermodynamics) ; Convergence (economics) ; Domain (mathematical analysis) ; Mathematical analysis ; Finite element method ; Boundary value problem ; Physics Magnetic Properties and Applications ; Numerical methods in engineering ; Composite Structure Analysis and Optimization
Authors: Hasna Khairunnisa | Fahri Triwidiyanto | Irham Aribowo
Source: Jurnal Sains dan Aplikasi Keilmuan Teknik Industri (SAKTI) (article, 2023-12-22)
Field: Materials Science — Polymers and Plastics

Evaluasi Permasalahan Kekuatan Splicing Benang pada Mesin Winding PT INS dengan Metode Seven Tools Yarn manufacturing engineering stands as one of the initial phases in the textile industry and holds considerable significance in determining subsequent process qualities. PT INS specializes in producing ring spun yarn, wherein the final stage integrates an automatic yarn quality control mechanism within the winding machine. When the sensor identifies any yarn irregularity, an automatic cutting process initiates. Additionally, the winding machine incorporates a yarn splicing procedure to reconnect separated yarn ends or join yarn during cop changes. Any flaw in this splicing process can lead to a weak yarn splice, evident in the diminished Retained Spliced Strength (RSS), which in turn impacts subsequent weaving and knitting processes. PT INS encountered a yarn splicing issue, evidenced by consistently low RSS values from each spindle on its winding machines. An analysis was conducted employing various tools, including Control Charts, Fishbone Diagrams, Check Sheets, and Pareto Diagrams, to pinpoint the problematic spindle and identify the root cause of the splicing problem. Subsequently, improvement measures were proposed based on the analysis of each contributing factor. These steps aim not only to enhance the splicing process within the winding machine but also to elevate overall yarn quality. Through this approach, PT INS aims to rectify the splicing discrepancies, ultimately ensuring a more robust splicing process within the winding machine and elevating the overall yarn quality. Yarn ; Winding machine ; RNA splicing ; splice ; Quality (philosophy) ; Process (computing) ; Weaving ; Mechanical engineering ; Computer science ; Winding number ; Engineering ; Engineering drawing ; Mathematics ; Physics Textile materials and evaluations ; Management and Optimization Techniques ; IoT-based Control Systems
Authors: Sarah Akers | Jenna Pope | Arman Ter-Petrosyan | Bethany E. Matthews | Rajendra Paudel | R. Comès | Steven R. Spurgeon
Source: Microscopy and Microanalysis (article, 2023-07-22)
Field: Materials Science — Surfaces, Coatings and Films

Maximizing Modalities: Accelerating Quantitative Multimodal Electron Microscopy Journal Article Maximizing Modalities: Accelerating Quantitative Multimodal Electron Microscopy Get access Sarah Akers, Sarah Akers National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States Search for other works by this author on: Oxford Academic Google Scholar Jenna Pope, Jenna Pope National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United States Search for other works by this author on: Oxford Academic Google Scholar Arman Ter-Petrosyan, Arman Ter-Petrosyan National Security Directorate, Pacific Northwest National Laboratory, Richland, WA, United StatesDepartment of Physics, University of California-Berkeley, Berkeley, CA, United States Search for other works by this author on: Oxford Academic Google Scholar Bethany Matthews, Bethany Matthews Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, United States Search for other works by this author on: Oxford Academic Google Scholar Rajendra Paudel, Rajendra Paudel Department of Physics, Auburn University, Auburn, Alabama, United States Search for other works by this author on: Oxford Academic Google Scholar Ryan B Comes, Ryan B Comes Department of Physics, Auburn University, Auburn, Alabama, United States Search for other works by this author on: Oxford Academic Google Scholar Steven R Spurgeon Steven R Spurgeon Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, WA, United StatesDepartment of Physics, University of Washington, Seattle, WA, United States Corresponding author: steven.spurgeon@pnnl.gov Search for other works by this author on: Oxford Academic Google Scholar Microscopy and Microanalysis, Volume 29, Issue Supplement_1, 1 August 2023, Pages 1868–1869, https://doi.org/10.1093/micmic/ozad067.964 Published: 22 July 2023 National laboratory ; Library science ; National security ; Operations research ; History ; Political science ; Engineering ; Law ; Engineering physics ; Computer science Electron and X-Ray Spectroscopy Techniques ; Advanced Electron Microscopy Techniques and Applications ; Electronic and Structural Properties of Oxides
Source: International Research Journal of Modernization in Engineering Technology and Science (article, 2023-04-23)
Field: Chemistry — Analytical Chemistry

PLANT LEAF DETECTION ANDROID APPLICATION Plants play an important role in our day to day life .They have became the support system to us in various ways and do provide us various benefits .Diseases in plants can cause many problems like it usually decreases the growth of plant , the plant tends to loose its quality and quantity both .It got its increased attention from monitoring large crop fields .In this paper we will review about some important plants which can further be enhanced .This method of detecting the leaves of a plant will further help in developing medicines which will protect us and will provide us the cure against any disease caused to us us by consuming any harmful plant. Android (operating system) ; Android application ; Horticulture ; Biology ; Environmental science ; Computer science ; Operating system Spectroscopy and Chemometric Analyses ; Plant Physiology and Cultivation Studies ; Phytochemistry and Biological Activities
Authors: Eduardo J. Aguilar | Valmir C. Barbosa | R. Donangelo | S. R. Souza
Source: arXiv (Cornell University) (preprint, 2023-08-07)
Field: Materials Science — Materials Chemistry

Configuration space partitioning in tilings of a bounded region of the plane Given a finite collection of two-dimensional tile types, the field of study concerned with covering the plane with tiles of these types exclusively has a long history, having enjoyed great prominence in the last six to seven decades. Much of this interest has revolved around fundamental geometrical problems such as minimizing the variety of tile types to be used, and also around important applications in areas such as crystallography as well as others. All these applications are of course confined to finite spatial regions, but in many cases they refer back directly to progress in tiling the whole, unbounded plane. Tilings of bounded regions of the plane have also been actively studied, but in general the additional complications imposed by the boundary conditions tend to constrain progress to mostly indirect results, such as recurrence relations. Here we study the tiling of rectangular regions of the plane by rectangular tiles. The tile types we use are squares, dominoes, and straight tetraminoes. For this set of tile types, not even recurrence relations seem to be available. Our approach is to seek to characterize this complex system through some fundamental physical quantities. We do this on two parallel tracks, one analytical for what seems to be the most complex special case still amenable to such approach, the other based on the Wang-Landau method for state-density estimation. Given a simple energy function based solely on tile contacts, we have found either approach to lead to illuminating depictions of entropy, temperature, and above all partitions of the configuration space. The notion of a configuration, in this context, refers to how many tiles of each type are used. We have found that certain partitions help bind together different aspects of the system in question and conjecture that future applications will benefit from the possibilities they afford. Tile ; Bounded function ; Plane (geometry) ; Tessellation (computer graphics) ; Mathematics ; Geometry ; Mathematical analysis ; Geography Quasicrystal Structures and Properties ; Theoretical and Computational Physics ; Phase-change materials and chalcogenides
Authors: Nima Rahimi Petrudi | Shahram Seyfi | Jalal Hassanshahi
Source: Annals of Military and Health Sciences Research (review, 2023-11-14)
Field: Chemistry — Analytical Chemistry

Mebudipine as an Overlooked Cardioprotective Drug: A Review Study Context: Calcium channel blockers (CCBs) play a crucial role in the treatment of cardiovascular diseases. Mebudipine, a dihydropyridine derivative CCB, was first synthesized in 1997. This study explores the potential benefits of mebudipine in managing cardiovascular disease, particularly as a derivative of nifedipine. Evidence Acquisition: The article succinctly presents the advancements in mebudipine research, which were uncovered through extensive searches in reputable scientific databases such as ScienceDirect, Google Scholar, Scopus, and PubMed, conducted by 2 blinded researchers. The search focused on studies relevant to mebudipine, using specific keywords. Results: Mebudipine exhibits cardioprotective effects, reducing the occurrence of arrhythmias and minimizing heart tissue damage. Additionally, it has been found to enhance the levels of nitric oxide metabolites. Due to its limited solubility in water, mebudipine is typically administered using a nanoemulsion. Importantly, it has been deemed a safe drug without mutagenic effects. Conclusions: Our review study underscores that mebudipine not only has a cardioprotective effect but also offers protection to other organs against various forms of injury induction. The mechanisms responsible for these protective effects may be linked to its ability to counteract oxidative stress, prevent apoptosis, and mitigate inflammation. Nevertheless, further research is needed to fully elucidate its potential. Context (archaeology) ; Pharmacology ; Medicine ; Nitric oxide ; Nifedipine ; Oxidative stress ; Dihydropyridine ; Drug ; Bioinformatics ; Intensive care medicine ; Calcium ; Internal medicine ; Biology Analytical Methods in Pharmaceuticals ; Electrochemical sensors and biosensors ; Cardiac electrophysiology and arrhythmias
Authors: Waluyo Waluyo | Muhammad Syah Putra
Source: IEEE Access (article, 2023-01-01)
Field: Materials Science — Materials Chemistry

Influence of Mounting Incline and Natural Environmental Factors on Pin-Type Silicone Rubber Insulator Leakage Currents Using Internet-Based Monitoring High-voltage insulators are essential components in overhead transmission and distribution lines. Various environmental factors and probable mounting inclines may influence the performance of insulators. Therefore, it is necessary to continuously and simultaneously investigate these influences using an internet-based data-logging system. Here, the test samples were vertical, thirty-degree, sixty-degree, and horizontal mounting inclinations on 7.5 kV-subjected pin-type silicone rubber (SiR) insulators. The recorded data included 7,917 measurements acquired every five minutes for a month and then analyzed using statistical tools. At midday, the surrounding environmental temperature, illuminance, and ultraviolet (UV) radiation reached their peak values, whereas the humidity reached its lowest value. The air pollution concentration reached its highest levels in the morning, and rain rarely occurred. The insulator leakage currents reached their top values before dawn and their lowest values at midday. Originally, the typical highest leakage current was the vertical mounting insulator, which reached 1.36 up to 2.36 times that of the remaining insulators; the maximum and maximum typical values were <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$24.27~\mu \text{A}$ </tex-math></inline-formula> and <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$4.9~\mu \text{A}$ </tex-math></inline-formula>, respectively. Increasing illuminance, UV radiation, and temperature influenced the leakage currents to decrease, but the corresponding leakage currents rose as the humidity, air pollution concentration, and rainfall increased. Based on extrapolations of the data, the vertical mounting insulator is the most vulnerable installation for severe air pollution concentrations, reaching a predicted warning condition of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$287.2~\mu \text{g}/\text{m}^{3}$ </tex-math></inline-formula>. However, the horizontal mounting insulator is the least suitable for rainfall above 16.86 mm. The typical shortest forecasted warning condition is 10.3 years on the thirty-degree mounting insulator. Leakage (economics) ; Silicone rubber ; Relative humidity ; Insulator (electricity) ; Humidity ; Electrical engineering ; Materials science ; Mathematics ; Composite material ; Physics ; Engineering ; Meteorology High voltage insulation and dielectric phenomena ; Thermal Analysis in Power Transmission ; Power Transformer Diagnostics and Insulation
Authors: Haohan Chen | Qianbin Feng | Jiepeng Wu | Yanlin Zhu | Hao Wang | Qiang Li | Lijun Wu
Source: arXiv (Cornell University) (preprint, 2023-08-05)
Field: Materials Science — Surfaces, Coatings and Films

Polarization-insensitive dual-wavelength dispersion tunable metalens achieved by global modulation method SF$_6$ is widely used as a gas-insulator in high-voltage power electrical system. Detecting SF$_6$ leaks using unmanned aerial vehicle (UAV)-based thermal cameras allows efficient large-scale inspections during routine maintenance. The emergence of lightweight metalenses can increase the endurance of UAVs. Simultaneously controlling dispersion and polarization properties in metalens is significant for thermal camera applications. However, via a propagation phase modulation method in which the phase is tuned locally, it is difficult and time-consuming to obtain enough different nanostructures to control multiwavelength independently while maintain the polarization-insensitive property. To this end, by using a global modulation method, a polarization-insensitive dual-wavelength achromatic and super-chromatic metalens are designed respectively. The working wavelength is set at 10.6 and 12 $\rmμ$m to match the absorption peaks of SF$_6$ and one of its decompositions (SO$_2$F$_2$), respectively. According to the operating wavelengths, only the geometric parameters of two nanofins are required to be optimized (through genetic algorithm). Then they are superimposed on each other to form cross-shaped meta-atoms. In order to control the influence between the two crossed nanofins, an additional term $Δf$ is introduced into the phase equation to modify the shape of the wavefront, whereby the phase dispersion can be easily engineered. Compared with local modulation, the number of unique nanostructures that need to be optimized can be reduced to two (operating at dual wavelengths) by the Pancharatnam-Berry (PB) phase based global modulation method. Therefore, the proposed design strategy is expected to circumvent difficulties in the local design approaches and can find widespread applications in multiwavelength imaging and spectroscopy. Achromatic lens ; Wavelength ; Polarization (electrochemistry) ; Optics ; Wavefront ; Phase modulation ; Materials science ; Modulation (music) ; Optoelectronics ; Physics ; Chemistry Optical Coatings and Gratings ; Optical Polarization and Ellipsometry ; Infrared Target Detection Methodologies