A different approach is to directly simulate the collisions and reactions of individual molecules or ensembles of molecules. This can often solve problems not well-described by differential equations, and allow for variations in things like reaction volume and pressure. A good visualization of a bimolecular reaction at the molecular level is here. Tenua is "e-postcardware;" it is freely distributable see the license as long as all these files are included with it, but I would appreciate an emailed picture of your hopefully scenic environs to hang on my wall and to give me an address to send upgrades to.
Please send your photos and bug reports and lists of desired new features and any cash you can spare to:. The program and the source code released are subject to the Sun Public License Version 1. A copy of the License is available from this site or from sun. Return to Table of Contents. Tenua is a Java 1. It is distributed as a Java archive. For Macintosh users, the program may look unfamiliar, with the menu bar at the top of each window instead of the top of the screen.
The menu items are mostly self-explanatory. The toolbar icons are all the same as the corresponding menu items, but are there for easy access.
The text boxes at the left of the graph control the scale of the axes. If the Auto-adjust Axes is checked, then the scale will be expanded as data are added to show all of the data.
If you want to zoom in on a section of the graph, uncheck this box, then enter the desired scale in the text boxes. Press the Optimize Axes to shrink or expand the axes to show all of the data, such that the plots fill the graph. The Reset button sets all the variables to their default values. The Notes tab This tab is simply a text editor where you can record notes and save or print them.
You can add notes from within a script using the note commands. Understanding how Tenua works is key to getting it to work well. The initial values are generally taken from the Initial Variable Values tab, but can be overridden in the script section of the mechanism description see Chapter 4. If there is no initialization statement, then the program uses the most recent value for those variables in some other mechanism, or zero otherwise.
Note that these calculations are all unitless. The program assumes everything is in the same units. The closer the numbers are all to 1, the more efficient the differential equation solver. So choose your units appropriately! If the rate constants differ by more than a few orders of magnitude, then there may be no way to get all the rates and concentrations to be on the order on 1. If this is a problem, see Chapter 7: Stiff Equations.
The compiler also puts all the other calculations as in the output section into a list of calculations to be evaluated at each time step. I'll call these the output calculations. It continues this cycle until time is greater than or equal to endTime. The number of substeps and how to calculate them depends on the algorithm used for the differential equation solver and the value of epsilon. If timeStep is 0 , then the program tries to select values for timestep that will give the right accuracy for the given epsilon , which may be all you need.
If the graph looks jerkier than you want, then you will need to set timeStep. The textual mechanism description consists of three major sections: the first section contains the chemical equations, initialization statements and intermediate calculations; the second contains the output equations; the third contains the "script". The chemical equations define the reaction scheme and the output equations define the variables to be graphed during the simulation.
The script describes exactly how to run the simulation. The syntax is based closely on Java's syntax, so every line or statement must end with a semicolon. The formal grammar is in a separate file ; this is less rigorous discussion. The first section of a mechanism description is the reactions section.
It contains chemical equations, initialization statements and intermediate calculations, each ended with a semicolon. They may be freely intermixed.
These equations are entered in standard chemical format. Numbers preceding a species name signify the stoichiometry in the reaction. Download Watch. Warranty Policy. Returns form. Payment and Delivery. BEAST - 31,5. PDG 2 - 30,5. Download Watch Tutorial.
Beast 16 Gold. Beast Was my DIN setting wrong I set it at 7 for a 70kg weight or is there another problem there? I had the leash attached to the heel unit but with plenty of slack, this might be a factor. Although had I not done so I probably would not have found the heel unit in the deep snow. This is the type of question that tempts us into jokes about needing ever more favor from Dynafit for providing customer service. So JC, your point about leashing the heel unit was indeed germane.
That said, inspect the binding and thimble bushing for damage compare to the intact binding , and obtain new parts if anything is missing or lunched. There seems to be a lot of avy activity surrounding resorts this year. Earlier this year I was caught in a small slide at Vail ski area, and luckily came out unharmed. Lou, I too have had my eyes opened for the chance of inbound avalanches this year.
Thanks for any info, JCS One method of attaching leash to Dynafit toe, from enclosed literature of uncertain vintage. Or donate it to the ski swap next November.
Join Date Aug Posts Used to work on those skis a fair bit. Silly idea and one of the few dynafit skis I didn't enjoy, but if I remember right, the four hole radical pattern works fine, you just have one mounting point on the toes. I've also installed other bindings on the skis as long as they aren't too close to the holes. Originally Posted by alive. Way to sour my attempts to sell these skis. Next your going to make fun of the Megawatts that I would love to sell.
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