أحدث بيانات هيئة المسح الجيولوجي الأمريكية عن الزلازل
The USGS Latest Earthquakes map shows earthquakes recorded worldwide, with the most recent events on top. The map can be filtered by time period, from the past hour to the past 30 days, and by minimum magnitude, and it can be centered on a region or shown for the entire world. Each event links to […]
MIT OpenCourseWare
MIT OpenCourseWare publishes course materials from MIT classes for free use. A course page typically holds the syllabus, lecture notes, assignments, exams with solutions and, for many courses, recorded lectures.The catalog spans engineering, physics, mathematics, computer science, materials, biology and management, from introductory subjects to graduate level. Course pages are searchable by department, topic and […]
الجبر الخطي الغامر
Immersive Linear Algebra is a free interactive textbook written by Jacob Strom, Kalle Astrom and Tomas Akenine-Moller. The figures are interactive, so vectors, planes, matrices and transformations can be moved and rotated directly in the page to see how a result changes. The book covers vectors, dot and cross products, matrices, systems of linear equations […]
هايبرفيزيكس
HyperPhysics is a physics reference built by Carl Nave at Georgia State University. Instead of linear chapters, topics are connected as concept maps, so a reader can move from one idea to related ones in a few clicks.Areas include mechanics, thermodynamics, electricity and magnetism, optics, sound, quantum physics, nuclear physics, relativity and astrophysics. Many pages […]
خرائط الكهرباء
Electricity Maps shows the real time electricity mix and carbon intensity of power grids around the world. For each zone, the map gives the share of sources such as wind, solar, hydro, nuclear, gas, coal and oil, the carbon intensity in grams of CO2 equivalent per kilowatt hour and the share of low carbon generation.For […]
مركز التنبؤ بالطقس الفضائي التابع للإدارة الوطنية للمحيطات والغلاف الجوي
The Space Weather Prediction Center is the official US source for space weather observations, forecasts and alerts. The site shows the current state of the Sun and near-Earth space, including solar wind speed and density, the interplanetary magnetic field, X-ray flux, proton and electron flux and the planetary Kp index.Alerts, watches and warnings are issued […]
كاشف الأعطال
Downdetector tracks outages of online services in real time from user reports. Each service has a page with a chart of reported problems over the last 24 hours, the most frequent problem types and a map that shows where the reports come from. Coverage includes internet providers, cloud and SaaS platforms, banks, payment systems, games […]
اتجاهات جوجل
Google Trends shows how the search interest for a term varies over time and by region, together with related queries and topics. Several terms can be compared on the same chart.It gives a quick view of demand and seasonality without running a survey. Rising related queries can point to new needs or new vocabulary in […]
قاعدة بيانات محركات الصواريخ ThrustCurve
ThrustCurve.org is a unique database of model and high-power rocket motors with performance data and thrust curve files. Motors can be searched by size, impulse class and manufacturer.The data files can be loaded into rocket simulation programs, which makes a flight simulation possible without measuring the motor yourself.User submitted test data are also included for […]
نظام بيانات الفيزياء الفلكية التابع لناسا (ADS)
The NASA Astrophysics Data System is a search engine for literature in astronomy, astrophysics, physics and space science. It returns abstracts, citation counts and links to the full text where available.Its coverage of the field is deep, with citation and reference links that allow following the development of a result. Searches support fielded queries and […]