polyethylene (PE)

Any of the polymers of ethylene, the largest class of plastics. Its simple basic structure, of ethylene monomers, can be linear (high-density and ultrahigh-molecular-weight polyethylene; HDPE and UHMWPE, respectively) or branched to a greater or lesser degree (low-density and linear low-density polyethylene; LDPE and LLDPE, respectively). The branched polyethylenes have similar structural characteristics (e.g., low crystalline content), properties (high flexibility), and uses (packaging film, plastic bags, mulch, insulation, squeeze bottles, toys, and housewares). HDPE has a dense, highly crystalline structure of high strength and moderate stiffness; uses include beverage bottles, liquid detergent jugs, crates, barrels, and luggage. UHMWPE is made with molecular weights 6–12 times that of HDPE; it can be spun and stretched into stiff, highly crystalline fibres with a tensile strength many times that of steel; uses include bulletproof vests.

(1) (Phase Encoding) An early magnetic encoding method used on 1600 bpi tapes in which a 1 is an up transition and a 0 is a down transition in the center of the bit cell.

(2) (Processing Element) One of multiple CPUs in a parallel processing system.

(3) (Professional Engineer) An engineering licensure based on a combination of education and experience. Although each state varies its regulations, the minimum requirements are a four year engineering degree from an accredited school, four years of professional engineering experience and successful completion of two stringent exams along the way. It is estimated that only about 20% of practicing engineers in the United States are licensed.

professional engineer

A designation reserved, usually by law, for a person or organization professionally qualified and duly licensed to perform such engineering services as structural, mechanical, electrical, sanitary, civil, etc.

p.e.

Abbr. for “plain edged.”

1. In the lumber industry, abbr. for “plain end.”

2. Abbr. for polyethylene.

1.	(database)	PE - periodic group
2.	(storage)	PE - Phase Encoded.
3.	(architecture)	PE - processing element.
4.	(networking)	pe - The country code for Peru.

Prince Edward Island Parks

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No references found			PDH PDIAL PDIF PDIL PDIP pdksh PDL pdl-ft PDL2 PDM PDMS PDN PDP PDP Assembly Language PDP-10 PDP-11 PDP-20 PDP-6 PDP-7 PDQ PDR PDS PDS/MaGen PDSA cycle PDU PE PE format pea Pea and Bean Weevils Pea Aphid pea coal pea gravel pea gravel grout Pea Island National Wildlife Refuge Pea Moths pea ore Pea Ridge Pea Ridge National Military Park Pea Tree Pea Weevil pea-soup fog Peabody Peabody River King State Fish & Wildlife Area Peabody, Elizabeth Peabody, Elizabeth Palmer Peabody, Endicott Peabody, Francis Greenwood Peabody, George Peabody, George Foster Peabody, Lucy Whitehead Peabody, Robert Swain			PDWAI PDWE PDWF PDWG PDWHF PDWP PDWR PDWRAM PDWS PDWSA PDX PDX-1 pDXA PDXI PDY PDYC PDYL PDYM PDYN PDYOR PDYU PDZ PDZA PDZC PE PE Effect PE format PE Insulated Jelly Filled Pe king Pe king PE&D PE&MR pe- PE-1 PE-ACH PE-Ci PE-CVD PE-EGF PE-HD PE-I Pe-king Pe-king PE-O PE-S pe-tsai pe-tsai cabbage PE-X PE/HE PE/HR PE/PI PE/TE