Recent Changes

Perri Chandler NRVF#12/53 NEW ROCHELLE PURPLE AND WHITE WAVE!!!!!!!!
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Cooperative Multitasking- is a type of multitasking that must allow other programs to control the CPU. It is called cooperative beacuse all programs must cooperate for it to work.
Preemptive Multitasking- is a program that decides how long to give to one task before switching to another task to use the operating system. Taking control of the operating system by one task and then switching to the other task is called preemptive.
Threading- is the smallest unit of processing that can be used by the operating system. A thread is contained inside a process. If their are multiple threads in the process it is know as memory.
During the past few weeks we learned about programming on the computer with Robot Basic. Now that we moved on from that we are now learning the basic of programming on the micro controller. Which we haved learned how to wire the led light, resistors, etc to the micro controller. After having did all this we are able to use a program called basic stamp to program it to do anything such as making the led light blink slow, fast, medium. A few days ago we also did this amazing thing with the micro controller; we attached a 7 segment display which i felt is like a scoreboard. This 7 segment display can display numbers and letters. I am looking forward to finishing this program and see what new things I can learn.
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propagation delay- is the amount of time it takes for the head of the signal to travel from the sender to the receiver.
Attenuation coefficient -is a quantity that characterizes how easily a material or medium can be penetrated by a beam of light, sound,particles, or other energy or matter.
Reflection- is the change in direction of a wavefront.
Dispersion- the dependence of wave velocity.
Jitter- is the difference in end-to-end delay between selected packets in a flow with any lost packets being ignored.
Latency- is a measure of time delay experienced in a system.
Collisions when two or more stations attempt to transmit a packet across the network at the same time.
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Cyclic Redundancy Check-is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data.
Two-dimensional parity-is a simple type of error correcting code that operates by arranging the message into a multidimensional grid, and calculating a parity digit for each row and column.
Internet checksum-A checksum is a simple error-detection scheme in which each transmitted message that results in a numerical value based on the value of the bytes in a message
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Assignment for 2/29/2012
IP Address Class
Total # Of Bits For Network ID / Host ID
First Octet of IP Address
# Of Network ID Bits Used To Identify Class
Usable # Of Network ID Bits
Number of Possible Network IDs
# Of Host IDs Per Network ID
Class A
8 / 24
0xxx xxxx
1
8-1 = 7
27-2 = 126
224-2 = 16,277,214
Class B
16 / 16
10xx xxxx
2
16-2 = 14
214 = 16,384
216-2 = 65,534
Class C
24 / 8
110x xxxx
3
24-3 = 21
221 = 2,097,152
28-2 = 254

Perri Chandler NRVF#12NRVF#12/53 NEW ROCHELLE
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Cooperative Multitasking- is a type of multitasking that must allow other programs to control the CPU. It is called cooperative beacuse all programs must cooperate for it to work.

Estevez Wilson >Red
Jorge Sanchez >Red
Joe Blow test

Estevez Wilson >Red
Jorge Sanchez >Red
Joe Blow test

Welcome to SWBOCES
CERN Technology - A.M. Program
Assignment for 3/5/2012
1. What are seven advantages of fiber-optic cable?
2. Light is measured in what units?
3. What is the wavelength range of visible light?

Multimode fiber optic cable has a large-diameter core that is much larger than the wavelength of light transmitted, and therefore has multiple pathways of light-several wavelengths of light are used in the fiber core.
Singlemode fiber optic cable has a small core and only one pathway of light. With only a single wavelength of light passing through its core, singlemode realigns the light toward the center of the core instead of simply bouncing it off the edge of the core as with multimode.
light is measured in nanometers
Visible light has wavelength in a range from about 380 nanometres to about 740 nanometres

7.5 Ease Of Installation
7.6 High Bandwidth Over Long Distances
2.2.Light is measured in what units?
Light is measured with two main alternative sets of units: radiometry consists of measurements of light power at all wavelengths, while photometry measures light with wavelength weighted with respect to a standardised model of human brightness perception. Photometry is useful, for example, to quantify Illumination (lighting) intended for human use.
3.What is the wavelength range of visible light?
he range of visible light is 380-750 nm

up to 40 miles (60 Km)
3/5/2012
1)
3) What1.What are seven advantages of fiber-optic cable?
7.1 Immunity to Electromagnetic Interference
7.2 Data Security
7.3 Non Conductive Cables
7.4 Eliminating Spark Hazards
7.5 Ease Of Installation
7.6 High Bandwidth Over Long Distances
2.
3.What is the of visible light?**light?
he range of visible light is 380-750 nm
For each color:

Fiber Type
Connector
Transmission Distance covered**covered
-1
850 nm
FCPC
up to 40 miles (60 Km)
3/5/2012
1)
3) What is the wavelength range of visible light?**
he range of visible light is 380-750 nm
For each color:
violet 380-450 nm
blue 450-495 nm
green 495-570 nm
yellow 570-590 nm
orange 590-620 nm
red 620-750 nm

Welcome to SWBOCES
CERN Technology - A.M. Program
Assignment for3/1/2012
Hi all.
Explainfor 3/5/2012
1. What are seven advantages of fiber-optic cable?
2. Light is measured in what units?
3. What is the difference between Single Mode and Multi-Mode Fiber Optic Cable and list somewavelength range of specification for each.
Mr. Pvisible light?