セマンティックScholar論文検索
Semantic Scholar is a free search engine for scientific literature, run by the Allen Institute for AI (Ai2). It indexes over 238 million papers from all fields and adds citation information and AI assisted reading features such as the Semantic Reader. The originality of Semantic Scholar lies in its public API, giving programmatic access to paper search and metadata. Author pages and citation lists show how an idea spread between papers, which a general web search does not provide. Scientists and engineers use it for literature reviews, to find the papers citing a standard method, and to check related work before starting a development. Searching is free and works without […]
arXivプレプリントアーカイブ
arXiv is the open access archive of about 2.4 million preprints in physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. Authors post the papers, and arXiv does not peer review them. Subject browsing, daily new and recent listings per category, and an advanced search allow close tracking of a field. Examples are cond-mat.mtrl-sci for materials science or eess.SY for systems and control. Put simply: A MUST for science and research. Engineers and scientists read results months before journal publication and find methods, datasets and code references. Reading is free and needs no account. An account is required only to submit. Preprints remain […]
ブラウザでJupyterLite Python Notebookを使用する
JupyterLite is a distribution of JupyterLab that runs entirely in the web browser. Python code executes through WebAssembly, so no server and no local Python installation are needed. Notebooks, files and settings are stored in the browser. It starts in seconds and offers the familiar notebook interface with interactive widgets. The limits are real: it is not meant for large datasets or heavy computation, installing arbitrary packages is restricted, and stored data disappear if the browser data are cleared. Insight JupyterLab is a browser-based workspace for interactive computing, built around notebooks that mix code, results (tables, plots, widgets) and explanatory text. It needs a Jupyter server, local or remote, where […]
NIST化学ウェブブック
The NIST Chemistry WebBook is the online reference of NIST Standard Reference Database 69. It provides thermochemical, thermophysical and ion energetics data for over 40,000 chemical species, together with IR, mass and UV/Vis spectra, gas chromatography retention indexes and computed 3D structures.Search works by name, formula, CAS number, InChI, reaction, author or molecular weight.The data come from collections maintained by the NIST Standard Reference Data Program and outside contributors, which separates it from crowd-edited chemistry sites.Tip: a fluid properties module gives high accuracy data for a selected group of fluids, and a group additivity tool estimates gas phase thermodynamic properties from a submitted structure.Process, materials and combustion engineers use it […]
CoBLIS色覚異常シミュレーター
CoBLIS (for Color BLIndness Simulator.) transforms an uploaded image to show how it appears to people with red, green, blue or complete color blindness. A pan and zoom function allows inspection of details. All calculations should run on your own machine, so no image is uploaded and there is no size limit. Note: the simulation algorithm is the HCIRN color blind function, free for non-commercial use. Commercial use requires contacting HCIRN. A must for GUI design & ergonomics validation. Designers check charts, interface states and signage that rely on color alone. Scientists test plots and false color microscopy images before publication. Engineers designing control panels verify that alarm and status […]
MolView 分子ビューアおよびエディタ（2D & 3D）
MolView combines a structural formula editor with a 3D model viewer in the browser. You draw a molecule, convert it to 3D, then rotate or measure it.Super great: it can also searches PubChem compounds, RCSB Protein Data Bank macromolecules and the Crystallography Open Database.It shows mass, IR and predicted H1 NMR spectra, exports MOL, PDB and CIF files and images, and embeds a structure in a web page by link. The older version adds Jmol based calculations, including energy minimization and electrostatic potential surfaces.Chemists and materials scientists view a crystal or a protein without desktop software. Engineers check the formula, mass and identifiers of a compound.Note: the newer version of […]
ファルスタッド電子回路シミュレータ
Falstad electronic circuit simulator solves analog and digital circuits in real time and animates the result on the schematic. Green marks positive voltage, red marks negative voltage, and moving yellow dots show current.Any component can be edited with a right click, and a large menu of example circuits covers filters, oscillators, op-amp stages and logic.The originality is the live visual feedback. Switches respond to a click, values change while the simulation runs, and the effect appears immediately instead of after a separate run. A standalone offline version and an AVR8js variant for microcontroller code are also published by the author.Electronic engineers can use it to sanity check a topology before […]
マーメイドスケッチライブエディター
The Mermaid Live Editor renders complex diagrams and visualizations from Markdown-inspired text scripts and Mermaid format. It provides a real-time environment for generating diverse schema types, including flowcharts, sequence diagrams, Gantt charts, and specialized visualizations such as Sankey diagrams, XY charts, and C4 architecture models.Several similar tools online, but this one is very convenient, especially with the many examples on the bottom left corner.Tip: the export function works good (PNG, PDF, SVG, and MMD with a choice of backgrounds) although in some sketches the adaptative zoom was framing a huge zone making the useful part microscopic (some non-visible element somewhere?).Engineering, science, and quality professionals can typically use this tool to […]
FDA警告書
The FDA Warning Letters database provides a public record of formal notifications issued to companies and individuals for significant violations of federal regulations. These letters detail specific deviations identified during agency inspections, such as failures in Current Good Manufacturing Practice (CGMP), inadequate quality system controls, and unauthorized product claims. The service includes a searchable interface that allows users to filter enforcement actions by company name, issuing office, and date, providing transparency into the agency’s regulatory focus and the technical failures that trigger legal escalations across the pharmaceutical, medical device, and food industries.Both latest and the 3700+ previous letters, giving much details about your current or potential suppliers … or competitors.A […]
Transitland GTFSデータベース 地図検索
Transitland is an open-source data platform that aggregates and harmonizes public transit information from thousands of global operators into a unified, queryable interface. It utilizes General Transit Feed Specification (GTFS) and GTFS Realtime formats to provide comprehensive data on route geometries, stop locations, and live vehicle positions. The service enables users to visualize transit networks via an interactive map and programmatically access standardized transit data through a robust API for geospatial analysis and application development. Among the top tools in that sector, their map tool if particularly efficient to use. Civil and systems engineers apply this platform to model multi-modal transportation networks and conduct accessibility studies for urban infrastructure projects.