What is a stack?
A stack consists of two 4×12 speaker cabs, one on top of the other. This was popularized by Marshall during the 60s. One 4×12 cab by itself is a half stack. Some manufacturers produce 2×12 cabs; these are sometimes called quarter stacks if and only if the speakers are mounted side by side in the cab. • My tubes glow blue – is this OK?? There are two reasons a bottle (!) may glow blue. Have a careful look. If there are patches of blue glowing on the glass, probably with fairly sharp edges, it’s due to electrons missing the anode and hitting the glass instead, making it flouresce. (Most of the tube envelope may even glow. -ed) Quite pretty, and you can play for hours, moving the patch with a magnet… (Don’t electrocute yourself!) This kind of glow is common with beam tetrodes and is completely harmless. (This type of glow is by far the most common. -ed) However, if there is a fuzzy blue glow in the space in the bottle (inside the plate, or streamers coming out -ed) it’s due to traces of
In the picture above, we see the front half of the stack. The disc has just been thrown from the thrower (top left corner person in red). Let’s assume that the disc is still in the hands of the dude in the top left, and talk about the Stack. What is the Stack? The stack is a formation that the offense arrays itself into when it has the disc. There are other formations possible (European, zone offense), but the Stack is the MOST common. In the example above, the player with the disc (Red Team) is in the top left corner. He is not technically part of the stack. The rest of the players (six if there is no dump (an offensive player behind the thrower) and five if thereis one) stand in a straight line down the field (closer to the offensive team’s end zone) from the thrower. That line is often vertical (North to South, or more closely parallel to the LENGTH of the field, and not the Width), although some angling can occur. The line is usually straight and may start 5-20 yards from the throw
As an example of how a stack works, consider a spring-loaded tray dispenser of the type often found in cafeterias. Let us say that each tray has number engraved upon it. One tray at a time is loaded in from the top, each resting on the already loaded trays with the spring compressing to make room for more trays as necessary. For example, in Figure 1.1, the trays numbered 42, 23, 2, and 9 are loaded onto the stack of trays with 42 loaded first and 9 loaded last. Figure 1.1 — An example of stack operation.
Java’s Stack class extends the Vector class. A Stack represents a Collection of objects that are in LIFO (Last In First Out Order). The Stack class provides operations that allow testing for zero elements, inspection of it’s top most element, removal of it’s top most element, and the addition of elements. boolean empty() Tests if this stack is empty. E peek() Looks at the object at the top of this stack without removing it from the stack. E pop() Removes the object at the top of this stack and returns that object as the value of this function. E push(E item) Pushes an item onto the top of this stack. int search(Object o) Returns the 1-based position where an object is on this stack.
