The Stellar Aberration 3D Model illustrates the phenomenon known as the aberration of starlight, first reported by James Bradley in 1729. Aberration occurs because light has a finite speed, and thus light from a star takes a finite amount of time to travel through the tube of a telescope. During...

MyCoRe is an Open Source project for the development of Repositories, Digital Library and archive solutions. The technical base of the system is formed of Java class libraries, XML technology and different database backends.

The Ptolemy/Copernicus/Tycho EJS Model illustrates the relationships between the systems of planetary astronomy developed by Claudius Ptolemy, Nicholas Copernicus, and Tycho Brahe. The model presents a simplified version of all three systems, showing the motions of the Sun/Earth and two planets...


Platforms: Mac, Mac OSX

Keyword: Addition, Apparent, Appears, Becomesthe, Deferent, Displayed, Epicycle, Equivalence, Essential, Geometric, Illustrate, Motion, System, Tychonic, Windowthis

The Astronomical Parallax 2D Model illustrates the phenomenon of parallax in astronomy. Parallax is the apparent displacement of an object relative to the background that is caused by the motion of the observer (rather than the motion of the object itself, or of the background). This simulation...


Platforms: Mac, Mac OSX

Keyword: Aligned, Assumed, Bottom, Circles, Distant, Ecliptic, Extreme, Locations, Moves, Played, Position, Rotates, Simple, Stars

The EJS Galileo Sunspots Model illustrates the motion and changes in appearance of sunspots as they move across the disk of the Sun. Galileo's observation of the changing appearance of sunspots around 1611 provided strong evidence that the spots were actually blemishes on the surface of the Sun,...


Platforms: Mac, Mac OSX

Keyword: Approaches, Behavior, Effects, Examine, Foreshortening, Latitude, Latitudes, Orientation, Shape, Slight, Solar, Spherical, Sunspot, Userdefined

The Galileo's Moon Mountain Model illustrates the method used by Galileo to measure the height of a mountain on the Moon. Using his improved telescope design, Galileo was able to see spots of light in the otherwise dark potion of the Moon. He interpreted these spots as mountain peaks which caught...


Platforms: Mac, Mac OSX

Keyword: Absolute, Allowed, Appears, Bottom, Didn, Grazes, Kmone, Modern, North, Shown, Shows, Sunlight, Units, Visible, Window

This Spheres of Eudoxus model simulates the system devised by the Ancient Greek astronomer Eudoxus to model the motion of the planets. The model consists of four nested concentric spheres. The axis of each sphere is attached to the surface of the next sphere out. The planet itself is located on...


Platforms: Mac, Mac OSX

Keyword: Adjusted, Arbitrary, Celestial, Crucial, Ecliptic, Equator, Essentially, Eudoxus, Fixed, Green, Plane, Sliders, Sphere, Stars, Units, Velocities, Velocity, White

Simple pure Java (one class) calculator using ResourceBundle and standard input to fetch the data from a user.


Platforms: Mac, Mac OSX

Keyword: Calculator, Class, Fetch, Input, Resourcebundle, Simple, Standard

Explore forces and motion as you push household objects up and down a ramp. Lower and raise the ramp to see how the angle of inclination affects the parallel forces. Graphs show forces, energy and work. Sample Learning Goals * Predict, qualitatively, how an external force will affect the...


Platforms: Mac, Mac OS X v10.4

Keyword: Acceleration, Affect, Diagram, Diagrams, Direction, Effects, Explain, Force, Graph, Graphs, Object, Position, Relate, Scenario, Sketch, Speed, Velocity, Versa

Astronomy is the science of celestial objects and phenomena that originate outside the Earth's atmosphere, such as stars, planets, comets, auroras, galaxies, and the cosmic background radiation. It is concerned with the formation and development of the universe, the evolution and physical and...


Platforms: Mac, Mac OS X v10.4

Keyword: Apply, Astrophysicists, Branch, Broad, Deals, Density, Disciplines, Electromagnetism, Including, Interactions, Limited, Luminosity, Mechanics, Quantum, Statistical, Subject, Temperature, Thermodynamics, Typically

This program calculates the observed rate constant (kobs) for reactions dependent on 1 to 7 protonic states. XH6 = XH5 = XH4 = XH3 = XH2 = XH = X The program calculates and plots the pH curves for the protonic states XH6, XH5, XH4, XH3, XH2, XH or X as well as the composite curves and...


Platforms: Mac, Mac OS X v10.6

Keyword: Bellfit, Brocklehurst, Computer, Conventional, Examples, Fitting, Ionization, Ppmfit, Programs, Schemes, Sigfit, Sitethis, Support, Values

PyEPL (the Python Experiment-Programming Library) is a library for coding psychology experiments in Python. It supports presentation of both visual and auditory stimuli, and supports both manual (keyboard/joystick) and sound (microphone) input as responses. To use PyEPL, you need to either *...


Platforms: Mac, Mac OS X v10.4

Keyword: Coding, Debian, Dependencies, Input, Install, Installers, Keyboardjoystick, Library, Microphone, Obtain, Package, Psychology, Responsesto, Sound, Source, System, Tarball, Ubuntu

This program can be used to fit pKa values to pH dependent data where the data titrates from one value to another e.g. ppm data, absorbance data, fluorescence data, Ki and Km data etc. This program fits and plots data to the equations:- If one pKa only Sobs=S1(1+K1/H)+S2/(1+H/K1) or...


Platforms: Mac, Mac OS X v10.6

Keyword: Applications, Copied, Dataresults, Document, Estimates, Experimental, Fitted, Initial, Input, Iterative, Leastsquares, Linear, Parameter, Pasted, Printed, Regression, Requires, Saved

The simulation shows two marbles colliding in a perfect elastic collision, showing how momentum is conserved. Graphs of the velocities and momenta of both marbles are shown. The user can change the mass of either marble and the initial velocity of one of the marbles. This simulation was...


Platforms: Mac, Mac OSX

Keyword: Archived, Collection, Collectionthe, Computer, Created, Easily, Generate, Hosted, Maintained, Massachusettsboston, Materials, Models, Modify, Offered, Program, Share, Simulation, Simulations, University, Users

WRF Domain Wizard is the successor to the WRFSI GUI and is a graphical user interface (GUI) for the new WRF Preprocessing System (WPS). It enables users to easily define and localize domains (cases) by selecting a region of the Earth and choosing a map projection. Users can also define nests...


Platforms: Mac, Mac OSX

Keyword: Advantages, Application, Downloading, Information, Inside, Launch, Launching, Namelistwps, Nest Gridparms, Portal, Program, Standalone, Start, Stores, Unzipping, Updates, Userswrf, Version

Enable the user to talk to the calculator to enter the numbers and operations or write them using a drawing panel , it support both English and Arabic languages.It have text to speech of the entered numbers/operations and reading the results.


Platforms: Mac, Mac OSX

Keyword: Arabic, Calculator, Drawing, Enable, English, Enter, Entered, Languagesit, Numbers, Numbersoperations, Operations, Panel, Reading, Results, Speech, Support, Write

SI_Browser is a essential viewer multiplatform for DICOM images. As standalone application it allows simple operations of viewing. It don't require installation nor others files (framework, library, etc.). Its fundamental functionality are: * compatible with all modalities (US, CT, MR, NM,...


Platforms: Mac, Mac OSX

Keyword: Catching, Center, Contrast, Controlssi Browser, Current, Folder, Image, Images, Information, Memory, Opening, Overlay, Pendrive, Playing, Portable, Previous, Software, Video, Window, Zooming

Simple UI to test the effectiveness of a heuristic algorithm against the brute force method for path finding among an arbitrary number of arbitrarily placed points on a grid. This is an educational project, don't expect new and better methods.


Platforms: Mac, Mac OSX

Keyword: Algorithm, Arbitrarily, Arbitrary, Brute, Don, Educational, Effectiveness, Expect, Finding, Force, Heuristic, Method, Methods, Number, Points, Project

Nengo is a software package that makes it easy to develop sophisticated models of neuronal circuits. It is intended for modelling large networks of neurons (typically hundreds or thousands), using spiking point-neuron models. To get a quick sense of how to use Nengo, watch the new demo video...


Platforms: Mac, Mac OSX

Keyword: Accept, Beginners, Behave, Curves, Defaults, Dynamically, Firing, Lamprey, Localization, Locomotion, Memory, Othersnengo, Probabilistic, Rates, Rough, Sound, Spatial, Tuning, Working

The Falling U-Shaped Chain model simulates the dynamics of a discrete falling chain with total length L and n links. Each link is acted on by the force of gravity mg and by the link-link interaction. A freely falling object is released near the last link for comparison. The surprise is that the...


Platforms: Mac, Mac OSX

Keyword: Archive, Attached, Click, Coefficient, Damping, Distance, Double, Ejs Mech Lagrangian Fallingushapedchainjar, Equilibrate, Fixed, Hanging, Included, Point, Pointthe, Position, Releases, Small