These canonical shapes are known to capture aspects of the knot type as well as approximating the average properties of random knots21, making them a useful reference geometry for each topology. The shapes of ideal knots for different topologies were obtained from an online source (http://k...
Using luminosity measurements, he determined how much mass should be in the cluster and then, because mass and gravity are related, calculated how fast the galaxies should be moving. When he measured their actual velocities, however, he found that the galaxies were moving much, much faster than...
Previous predictions about Neanderthal growth, based only on anterior tooth surfaces4,5, were necessarily speculative. These data are the first on internal molar microstructure; they firmly place key Neanderthal life history variables within those known for modern humans. This is a preview of ...
What Can’t My Dive Computer Do? As you can see, this is a great tool. It does a lot. But it can’t do everything. There are some factors that a dive computer cannot take into consideration. Those are all about you. You as an individual are a wild card when it comes to compute...
Macrame is an art of decorative knotting without using needles or hooks. By using a series of knots, many ornamental patterns are created. Macrame can be created using any kind of material. You can use fine thread to make macrame lace or even use leather strips. By a special technique, ...
We were asked to install the current version of Joomla (2.5.8) for a customer. Should just be a moment’s work? Not so. The people who wrote the install code try to do everything with absolute paths. This is fine if you are running on a single-use server. It blows up when one ...
Power is calculated by dividing the amount of work done by the time it takes to do it. Power is often given in units of horsepower or watts, although other units such as ft-lbf/min, calories/hour and BTU/sec are also used. The unit “horsepower” is defined differently depending on wh...
The gist of the research is this: if the universe is running in a simulation on a cubic lattice, in much the way that current quantum chromodynamics simulations are calculated, then there should be experimentally observable consequences. Beane and his team identify two: the anisotropic distribution...
The specific activity of enzymes can be altered over long timescales in cells by synonymous mutations that alter a messenger RNA molecule’s sequence but not the encoded protein’s primary structure. How this happens at the molecular level is unknown. He
There is an airspeed at which a wing will stall at 1 g in level flight. This is calculated at gross weight using an airspeed selected by the manufacturer. You will find this at the bottom of the green arc on the ASI (Vs1) . With gear and flaps the bottom of the white arc is Vso...