- PB
- Paper Ballot. Who would have thought that starting in the twenty-first
century, the paper ballot would come to be widely viewed as the gold standard
of voting technology?
- pb, PB
- Paper-Bound or PaperBack or Paperback Book. The last expansion is nicely
parallel with HB. Other abbreviations:
ppb., ppbk.
- PB
- Particle Board. Like fiber board (see MDF),
but made with wood particles, or a mix of particles and fibers. See the LMA's
downloadable
glossary.
- PB
- Peanut Butter. See also (or just guess) PB&J.
Peanut butter, for those unfamiliar with it, is a kind of spackle paste.
It takes a bit longer to dry than the usual stuff, however.
- PB
- Plasma reactor, Barrel type.
- Pb
- Chemical symbol for lead, from Plumbum, which was the
Latin name for nonprecious soft (ductile) metal;
lead was plumbum nigrum [black] and tin was plumbum album
[white]. (See Pliny, Nat. Hist. 34, 156.)
Atomic number 82. A dense metal and a heavy one. If you think that's
redundant, then tell ZZ Top to stop singing ``a ton of lead'' as if that were
any heavier than a ton of lumber. Lead is dense (11.34 g/cc). If you
have a lot of it, it's heavy. Gold is denser
(19.30 g/cc). If you have a lot of it, you're rich. Heavy is a matter of
perspective and motivation. ``He ain't heavy, he's my brother'' and all that.
From the perspective of nuclear or atomic beam physics, lead is heavier than
gold (atomic number 79) because the most common isotopes have higher mass
(atomic mass 207.2 vs. 196.97). Gold is
denser because it has a smaller molar volume. Transition metals tend to have
small molar volumes, and in consequence, the densest naturally occurring
elements are osmium (Z=76,
22.61 g/cc) and iridium (Z=77, 22.65 g/cc).
Learn more at its
entry in WebElements and its
entry at Chemicool.
The electronic image archives at Washington University at St. Louis had
a jpeg of an
old postcard of Leadville, Colorado. Look around, it's probably out there
somewhere on the web still.
- PB
- PortaBle. It's got a handle; we've done our part. You're on your own now,
buddy.
- PB
- PolyButadiene.
- PBA
- {Police | Policemen's | Patrolmen's} Benevolent Association.
Local 90 is the one in Westfield, New Jersey.
PBA spokesfolk are quick to assert that the PBA is not a union.
There: three one-sentence paragraphs in a row -- and you thought that was
illegal!
Five.
- PBA
- Prevent Blindness America.
Just to inject a little variety, I think it's nice to have some organization
names that look like imperative clauses. PBA
sponsors twelve months
a year. Moreover, seeing opportunity in a slow-news month, PBA has given
August the dual designations of ``Children's Eye Health and Safety Month'' and
``Cataract [sic] Awareness Month.'' In election years, they should
combine that into ``Childhood Cataracts Month.'' June also gets double
coverage, because ``Fireworks Safety Month'' is June and July.
- PBA
- Professional Bowlers Association.
Here's an interesting fact: bowling is a sport. It was once even a
surprising fact, but now that ESPN has
broadcast a (censored) scrabble event, it's merely interesting.
I had a look at the 1944 and 1947 editions of The New Encyclopedia of
Sports, by Frank G. Menke, to get some authoritative confirmation.
Sure enow, it lists Bowling. It also lists birling, which is the sport form
of the business of log rolling. A birling tournament is a roleo.
Similarly, a birding tournament is a rodeo. Well, okay, it isn't. But
it should be. After all, the longest-running
competitive birding tournament in the US is held in Texas.
Menke also lists corn husking. In
the years 1924 to 1941, the three contests with the lowest winning net bushels
husked (in eighty minutes) were the years with the most inclement race
conditions (snow and ice in 1927! -- only 15.47 bu.). There were no contests
in 1942-1946, but they were set to resume in 1947.
- PBA
- PyreneButyric Acid.
- PBC
- Peripheral Bus Computer.
- PBC
- Processor Bus Controller.
- PBCC, pbcc
- Palm Beach Community College.
- PBCO
- PrBa2Cu3O7.
- PBE
- Portable Breathing Equipment.
- PBGA
- Plastic Ball Grid Array.
Click
on this search for images.
- PBGC, P.B.G.C.
- Pension Benefit Guaranty Corporation.
Set up by the US Congress in 1974 to insure defined-benefit corporate pensions.
(It was part of an act dubbed ERISA; see
EBSA for details.)
PBGC is meant to take over the operation of a corporate pension whenever the
corporation fails. Corporations that run pensions are required by law to have
pension funds that can't be looted by the company to make up business
shortfalls. (It's not like the Social Security
Administration, whose funds consist of the federal government's promise to
pay back the money it took from FICA
contributions.)
When the PBGC takes over a pension, it takes over the pension fund's assets but
not, by law, its entire obligations. It's like federal deposit insurance,
which protects deposits up to a certain amount, but determining the coverage is
much more complicated. So the PBGC typically covers some of the shortfall from
its own budget, but much of the shortfall is made up simply by reducing
benefits.
Who gives up how much is a complicated calculation based on a variety of rules.
The rules generally favor older workers. As of 2009, for example, the maximum
benefit is $54,000 for a retiree aged 65 or over, $42,660 for a 62-year-old,
and $24,300 for a 55-year-old. One doesn't automatically receive the maximum
if one's defined benefit under the defunct pension exceeded it. The rules
contain ``tripwires'' and cut-offs that can leave workers with similar work
histories at the same company receiving very different benefits.
- PBGL
- Private Banking Group, Luxembourg. ``[A] group [see
this
brochure] of members of the Luxembourg Bankers' Association (ABBL) that specialises in private banking.''
- PBI
- Parental Bonding Index.
- PBI
- Producto Bruto Inter{ior|no}. Either way, it's
Spanish for `GDP.'
``PIB'' is more common.
- PBI
- Protein-Bound Iodine.
- PB&J
- Peanut Butter and Jelly. You can actually buy
jars of premixed PB&J, ready to spread.
- PBL
- Poly-Buffered LOCOS. A polysilicon layer between the pad oxide and the
nitride absorbs the stress produced by field oxidation (i.e., by the
expansion of the layer oxidized into field oxide).
- PBL
- Problem-Based Learning. In practice, not distinguished from CL.
- PBM
- Play By Mail.
- PBM, .pbm
- Portable BitMap. An image format: MIME-type
image/x-portable-bitmap.
- PBM
- Poskanzer Portable BitMap (graphics format).
- PBMA
- Poly ButylMethAcrylate.
- PBN
- PeroxyButryl Nitride. One of the peroxyacyl
nitrates (PANs, q.v.) found in the atmosphere.
- PBO
- Nice deceptive acronym for PlaceBO. For some disorders, this is almost as
effective as other, more expensive treatments. Expect your
HMO to get right on the case.
- PBOC
- People's Bank Of China. The PRC's central bank.
- PBP
- p-BromPhenol. The p stands for the para position of the
benzene ring, indicating where the bromine is bonded.
- PBR
- Particle-Bed Reactor. A nuclear reactor whose fuel elements are in the
form of small particles. See the related PBR.
- PBR
- Pabst Blue Ribbon (beer). I think that
some time in the nineteenth century, or maybe it was during the nineteenth
dynasty (the Egyptians claim they invented beer), Pabst won a blue ribbon for
one of its beers. Ever since, they've been milking that award for publicity.
I would want to know more about the ribbon accrediting agency. I mean -- even
I've won blue ribbons! There are stores that specialize in trophies and
awards (see ARA). It's all
tinsel.
- PBR
- Pebble-Bed Reactor. A nuclear reactor whose fuel elements are in the form
of small pebble-size pieces. A similar reactor with smaller fuel elements is a
Particle-Bed Reactor. If you want to distinguish
the two, the standard initialisms won't help. Both PBR designs were proposed
for space missions. I'm not sure if any have been put into service.
- PBR
- Pilling-Bedworth Ratio.
- PBS
- Peoria Botanical Society. A section of the Peoria Academy of Science
(PAS). To judge by web salience (ghits, actually) it's either moribund or hiding
behind another name than that by which the PAS knows it.
- PBS
- Pharmaceutical Benefits Scheme. Part of the Australian government's
federal health care system, called Medicare.
- PBS
- Public Broadcasting Service.
Also ''... System.'' A US propaganda organization that is corrupting the
morals of our nation's ... elderly?
According to an article in the January 16, 2001, Pittsburgh
Post-Gazette,
PBS is trying to broaden its audience base. PBS president Pat Mitchell said
the member stations were worried about the aging PBS audience. The average
age of the PBS viewer was 56. I suspect that distribution is bimodal: a
majority of the top ten children's programs are on PBS, and they start to lose
those viewers around age six. When you subtract out the audience for Sesame
Street and such, the average age was more like 65. Okay, more precision:
according to Ron Santora, director of programming for Buffalo's Channel 17,
the average age was 56.4 (quoted in the hometown paper that March).
Actually, PBS is used to this sort of audience. What worries them is that they
used to pick up viewers as they aged, but they're not pulling in successive
generations as they used to. Still, from the few publicly available figures, it looks like they
made big progress in 2001. According to data gathered during the Nielsen
sweeps in November 2001, the median age of PBS viewers was all the way down to
55. I'm not really sure how comparable this number is with the previous one,
since it wasn't clear where the earlier one came from. It ought to be
comparable with the other Nielsen numbers, however: 51 for
CBS, 46 for NBC, 45 for
ABC and 39 for Fox.
In Spring 2002, Maryland Public Television had an unseemly public separation
from 69-year-old Louis Rukeyser, the long-time host of its program Wall $treet
Week (he quit and then was fired, if I understood correctly). During the
dispute, MPT noted that the average age of the Fortune reader was 49, while
most of the show's viewers were over 60.
It is a fine irony that PBS might be choosing the least opportune moment to
condescend in age. Since PBS was created, it has seen its mission as providing
``diversity'' in programming. Yes, they were using that very word -- before it
was fashionable, even before the Bakke decision. PBS tried to serve various
small audiences, such as thinking people, that were ignored by the major
networks. When cable came, it spawned a large
number of new networks that targeted various niche markets that only PBS had
served before. So PBS, like the commercial networks, lost market share to
cable. But some of the networks that ate PBS's lunch (or dinner and
prime-time, rather) found it less tasty than they expected.
TNN, though it did not start as a cable network, was
originally aimed at one of the larger niches underserved by ABC/CBS/NBC. With
its devolution into Spike TV, ``the first network for men,'' any threat it may
have represented to PBS market share has pretty much vanished into the ether.
At the same time that PBS has been moving to attract younger audiences, A&E and the Discovery
Channels have been doing the same thing. PBS
might do well to let its competition go away instead of chasing it.
PBS receives public funding via CPB, q.v.,
but this covers a shrinking fraction of its expenditures. One of the
distinctive features of public television in the US is the twice-or-more-yearly
begathons. You know, I hate to interrupt the glossary, but all of you
understand what a valuable service we provide, and you know this kind of
quality doesn't come free. All of this information is supported by
contributions from savvy internet surfers
like you. Please call the number at the bottom of your screen now and make
a pledge. We have celebrities standing by to receive your calls. Look,
they're all celebrities. Beverly Sills and Josh Groban aren't able to
take all of your calls, so if your call is answered by Ashley or Britney
or Christina or Lindsay, please don't hang up and call again! If you
call now, you will receive a tasteful and attractive WSBF extra-large diaper
tote! Please call within the next 18 minutes, as we have a generous challenge
grant: every dollar you pledge will be matched by an anonymous donor!
Another traditional source of PBS funding is corporate sponsorships. This
started out as a fairly reserved PR thing, with
Texaco or some other munificence covering an entire series of shows about some
environment somewhere, subtly demonstrating Texaco's commitment to the
existence of an environment. That well of money has been steadily drying up,
and in the 1990's public television really started to explore the quid-pro-quo
and bald-advertising reaches of ``sponsorship.'' You see a lot more
Britcoms sponsored by local furniture stores
these days.
- PBSR
- Papers of the British School at Rome.
- PBT
- Permeable-Base Transistor. One kind of gridded-base transistor. Another
is the static induction transistor (SIT).
- PBT
- PolyButylene Terephthalate. A polyester.
- PBX
- Plastic Bonded eXplosive[s].
- PBX
- Private Branch [telephone] eXchange. A local telephone network in which
internal telephone calls don't go through the end office. You know: dial
``9'' to get out.
- PC
- Diacyl-glyceroPhosphoCholine.
- PC
- Paramagnetic Center[s].
- PC
- Parity Check. If this expansion of PC didn't have to do with
encoding of electronic communications, it might have to do with human
communications, because political correctness (PC)
is largely about establishing formal parity.
- pc
- ParseC. The distance represented by one arc second of parallax on a
baseline of one astronomical unit (not two,
as you might expect). In other words, 1 a.u. = sin(1
''
) pc, or
1 pc = 206264.81 a.u. ~= 3.26 light year (ly). The
continued popularity of units like this demonstrates the hypocrisy of
some vocal scientists' insistence on metric conversion.
- PC
- Parti Communiste.
- p.c.
- Patres Conscripti. Literally `fathers on the register' in Latin, but the abbreviation was used specifically to
mean `members of the Senate.' For an example, see the Apocolocyntosis,
sec. ix, where Zeus is imagined as presiding over an Olympus modeled on the
Roman Senate. Apocolocyntosis (see Great Pumpkin) is attributed to Seneca. The
uncertainty of the attribution is not surprising. It would have been prudent,
as the work ridiculed and condemned the not-long-enough-deceased emperor
Claudius.
- PC
- Pension Coordinator.
- PC
- PeriCynthion. Don't just sit there
with your mouse agape -- follow the link!
- PC
- Personal Computer. I also found this expansion in a
French dictionary: Personal Computer. I
wonder how that's pronounced.
- PC
- Personal Communication.
- PC
- Phase Conjugat{ion|e}.
- PC
- Phase Contrast.
- PC
- Philosophical Counseling. Just the thing for people whose emotional
problems are due to a philosophical misunderstanding. They mean it: this is a
growing racket.
- PC
- PhosphatidylCholine. Also abbreviated PtdCho.
- PC
- PhotoConductiv{ity|e}.
- PC
- Photonic Crystal. In practice: a periodic variation in dielectric
constant, produced by a superlattice or superlattice array.
- pc., pc
- PieCe. Traditional abbreviation uses period. Often used without period
by packagers and shippers. Plural pcs. and pcs.
(You know what I mean.)
- PC
- Pigeon
Cluster. The breakthrough technology that is the basis of the Google search engine page-ranking (PigeonRank
[tm]).
- pc
- Pitch Class. A term used in music set theory to designate all pitches
having the same name, and their enharmonic equivalents. That is, from an
ordinary mathematical point of view, simply the equivalence class of pitches
under the equivalence relation defined by mod-twelve addition in a twelve-tone
scale. The pitch class C consists of all C's -- middle C and all pitches that
have frequency 2Nn times the frequency of middle C, where
n is an integer.
- PC
- Polarization Controller. A device within a waveguide laser, but it does
sound like the PC police.
- PC
- {Politically Correct | Political Correctness}.
``For us, too, `PC' no longer stands just for Police Constable, postcard, Privy
Counsellor or even personal computer, but also and above all for political
correctness - a term which, whatever its polemical use and abuse, concerns a
cluster of issues around codes of civility and censorship both verbal and
behavioural.''
The preceding quote is dredged from page 19 of Pedagogy and Power: Rhetorics
of Classical Learning, a collection of essays including some gems of
aggressively bad writing. The particular essay quoted is Chapter 1:
``Classics: from discipline in crisis to (multi-)cultural capital.'' The
author, Paul Cartledge, thanks ``our extraordinarily conscientious and vigilant
editors.'' Those editors, Yun Lee Too and Niall Livingstone, have allowed him
to clot his prose with conjunctions like ``despite - or because of? -'' and
parentheticals like ``(everything going wrong - or moment of decision).'' If
you have a term paper due tomorrow, borrow from this. No one will ever
guess that the callow, stilted prose you plagiarize would ever (1998) have
been published by Cambridge University Press. (Be careful, though: it's
not utterly dreadful.)
This isn't
PC.
If you wanted some thoughts on political correctness, you should have gone to
the Retarded entry.
- PC
- PolyCarbonate. A set of related plastics with monomer unit -R-O-COO-.
Optical quality grades (OQ) used in compact discs
and contact lenses. Wear-resistant (WR) grades used for keyboard frames, swivel bases, paper
drives and printers. San Diego Plastics,
Inc. serves a short
page of application-oriented information on polycarbonate. GE's trademark (TM) for PC is Lexan.
Polycarbonate may or may not be ``UV-stabilized.'' The unstable PC can
be recognized because it fluoresces under UV light.
There's an informative PC
entry in the
Macrogalleria.
- PC
- Post Cibum. Latin, `after meal.'
- PC
- Printed Circuit.
- PC
- Priority Control.
- PC
- Privy Council. Despite comments quoted at an
earlier PC entry, we figured we ought to have this entry here for
historical reasons. Don't forget to be uninformed at the PCO entry as well!
- P.C.
- Professional Corporation.
- PC
- Program Counter.
- PC
- Progressive Conservative. Canadian political party -- the Tories.
- PC
- Protocol Control.
- PCA
- Patient-Controlled Analgesia.
This isn't a new concept. One bourbon, one scotch, and one be-eer.
- PCA
- Pennsylvania
Classical Association.
- PCA
- Personal Care { Aide | Attendant }. New improved name for a nursing
assistant (a/k/a nurse's aide), but not as new and improved as PCP.
- PCA
- Poodle Club of America,
Inc. We proudly serve a preposterously trimmed poodles entry.
- PCA
- Porsche Club of America.
The Porsche -- another German creation that runs
like a pup. The famous engineer Porsche also created the original beetle, for
which we do have an entry.
- PCA
- The Presbyterian Church in America. ``The Presbyterian Church in America
is a new denomination, founded in 1973,'' founded out of a felt ``need
for a scriptural, evangelical, and reformed witness for Christ.''
(``Reformed means we believe that salvation is God's action alone.'')
- PCA
- Principal Component[s] Analysis.
- PCA/ACA
- Popular Culture
Association/American Culture Association.
- PCAC
- Personal Computer Acquisition Contracts. Refers to a specialized sort
of ``Indefinite Delivery Indefinite Quantity
(IDIQ)'' contracts (sound more like options to buy) used by
NASA.
- PCAPLA
- Pacific Coast Association of Prelaw
Advisors. Similar organizations are listed at the
SWAPLA entry.
- PCARS
- Partially Coherent Anti-Stokes Raman Scattering (CARS).
- PCAST
-
President's Committee of Advisors on Science and Technology. Provides
public-sector input to science advice received by President.
- PCAT
- Pharmacy College Admission Test.
- PCB
- Panama City Beach, Florida.
- PCB
- PolyChlorinated Biphenyl[s]. A liquid that was
a very popular electric insulator (``askarel insulation'') used in transformers
from the 1920's until 1977, when the EPA outlawed
its use in the US, with the declaration that PCB's are probable carcinogens and
(definitely) cause liver and nervous-system damage. A bacterial degradation
path from PCB's goes via CBA's.
- PCB
- Printed Circuit Board. A circuit built on a board with interconnections
made by the prior etching of a metallic cladding layer (on one or both sides).
[Word of advice: in drilling through the board, drill from the non-copper-clad
side if at all possible. Copper is a soft metal which tends to deform and
form sticky burrs when drilled or machined. Burrs can imbed on the inside
surface of a drilled hole and cause arcing (arcking?) at high voltage.]
- PCBA
- Printed Circuit Board Assembly.
- PC Bone
- I can't lie to you... it's just the name for that ubiquitous shade of
beige.
- PCBS
- Palestinian Central Bureau of Statistics.
Also ``Palestinian CBS.''
- PCBTF
- p-ChloroBenzoTriFluoride.
- PCC
- Panama Canal Commission.
- PCC
- Peru-Chile Current. Despite the name, it flows northward along the coast
(i.e., past Chile first).
- PCC
- Presidents' Conference Committee. A committee made up of representatives
from various North American transit operators. It met in the mid-1930s and
produced a design for a modernized streetcar. PCC cars were manufactured from
1936 until 1952 and the design became the basis for most North American
streetcars. There are still a few in regular service today. If this glossary
is still providing infotainment long after 2003, then I suppose ``today'' will
eventually be incorrect in the previous sentence.
You're probably wondering, ``what is a `streetcar'? Is it the opposite of an
off-the-road vehicle?'' For possible enlightenment, see the TTC entry.
- PCC
- Primeiro Comando da Capital. `First Capital
Command.' An murderous Brazilian gang that since May 2006 has challenged the
municipal government for control of São Paolo.
- PCC
- Pyridinium ChloroChromate. One of the two chemicals known as
Corey's reagent. The other is dimethylsulfoxonium methylide.
- PCD
- Phase-Change Drive.
- PCD
- PhotoConductive Decay.
- PCDE
- Photon-induced Chemical Dry Etching. (With really intense energetic
photons, you can do dry etching without chemicals, but that's called
ablation.)
- PC-DOS
- Something very like CP/M, developed by Microsoft for the IBM PC.
Compare MS-DOS.
- PCE
- Partido Communista de España. `Communist Party of Spain.'
Founded by members who left the socialist party
(PSOE).
- PCE
- Personal Consumption Expenditures.
- PCE
- PolyChromatic Erythrocyte. An etymological oxymoron: multi-colored red
(blood) cell. Cf. the barbaric NCE.
- PCE
- Pre-Conference Event.
- PCE
- Present Company { Excluded | Excepted }. Often a synonym for ``Oops!''
after the making of an impolitic generalization in the presence of one of its
instantiations.
- PCF
- Parti Communiste Français.
- PCF
- Point Coordination Function.
- PCG
- PreConditioned Gradient (numerical method).
- PCGM
- PreConditioned Gradient Method.
- PCGS
- Professional Coin Grading Service.
- PCH, P.C.H.
- Pacific Coast Highway. All or part of California
state route 1, and parts of US 101.
For most of its length CA 1 is the highway closest to the coast. It's
scenic in the undeveloped parts. (There are still some undeveloped parts as of
this writing, April 8, 2002, 12:40 PDT.) Its southern terminus is just south
of San Juan Capistrano (roughly halfway between San Diego and Los Angeles), where I-5 (which
hugs the coast to the south) moves inland and CA 1 continues along the
coast.
Officially (according to Section 635 of the California Street and Highway
Code), the PCH is the part of CA 1 from there to a northern terminus
near Ventura, fifty miles up the coast past LA, where CA 1 ends at
US 101.
In the most expansive popular usage, PCH is all of CA 1 plus US 101
in those parts of California, Oregon, and Washington where there is no
California state route 1. One widespread usage defines the PCH as all of
CA 1 (whose northern terminus is at Leggett, where it joins US 101)
plus any pieces of US 101 needed to get between the southern and northern
termini.
- PChem, P-Chem
- Physical CHEMistry. Difficult fundamental course material that chemistry
majors are required to take, typically in the junior or senior year.
Pronounced ``PEE kem.'' (You are invited to admire my fortitude in not
commenting further.) Inspired the bumper sticker:
Honk if you passed P-Chem!
In my experience, PChem course is fairly unchallenging compared to any
real course covering any single topic -- thermodynamics, kinetic theory,
quantum mechanics -- included in a typical year of PChem. However, the
material is wide-ranging, and it is qualitatively different from and much
more mathematical than that in most other courses taken by chemistry and
chemical engineering majors. If the material interests you, get the
necessary math preparation and then take a specific course on the material
-- it'll be more beautiful and satisfying, and make more sense.
See also EMag.
- PCHR
- Palestinian Centre for Human Rights.
- PCI
- Pavement Conditions Index. Cf. PSI.
- PCI
- Percutaneous Coronary Intervention.
- PCI
- Periodicals Contents Index. A
searchable electronic database for the contents of thousands of periodicals in
the humanities and social sciences, from their first issues (as far back as
1770) to 1995. PCI's scope is world-wide and includes journals in English,
German, Italian, French,
Spanish and other Western languages. It's a
by-subscription service from the same company that offers LION.
- PCI
- Peripheral Component Interconnect. A self-configuring personal-computer
local bus, 32 bits wide, designed by Intel also
used by Motorola processors. FOLDOC has an entry.
- PCI
- Phase-Conjugate Interferometry.
- PCI
- Programmable Communication Interface.
- PCI
- Protocol Control Information.
- Pcia.
- ProvinCIA. Abbreviation for the Spanish word meaning `province.'
- PCI LBS
- Peripheral Component Interconnect (PCI)
Local Bus Specification.
- PCJ
- Planning Commissioners Journal.
- PCL
- Printer Control Language. Also expanded Printer Command Language.
There's an old saying: ``A mickle, a pickle.'' Most people don't remember
what a mickle is, or even a muckle. Me neither. Let me know after you look
it up. Maybe check here.
PCL is the document description language developed by Hewlett-Packard
(HP) for its Laserjet series of laser printers.
Compare PostScript.
- PCM
- Phase-Change Memory. Not the memory of an ordinary phase change, like
freezing or anything. PCM is probably for something more memorable, like
cholesteric-to-blue-phase, or the liquid-gas transition followed to the
critical point, or... Hmmm, okay, it's not any of that. PCM is just
a kind of solid-state memory more commonly called
PCRAM, q.v.
- PCM
- Phase-Conjugate Mirror. Generates phase-conjugate reflection of
incident light. Used in PCI.
- PCM
- Primary Care Manager. Hey, why pay for a
physician to decide on medical expenditures when a social worker with no
understanding of medicine can make more cost-effective decisions for less pay?
- PCM
- Pulse-Code Modulation.
Not the most important thing to say about PCM, but of concern to me right now,
is that it's the most common storage method for wave files (*.WAV) on the
Windows platform.
- PCMCIA
- Personal Computer Memory Card
International Association.
Tiny (credit-card size) expansion boards for computers. They have 68-pin
connectors and come in three different thicknesses, up to
1 cm for a hard drive. Used most in laptops.
Here's a description from
whatis.com.
- PCMCIA
- People Can't Master Computer Industry Acronyms.
- People Can't Memorize Computer Industry Acronyms.
Folk expansions for PCMCIA supra.
- PCMDI
- Program for Climate Model
Diagnosis and Intercomparison.
- PCML
- Pseudo Current Mode Logic (CML). As CML is
a synonym of Emitter-Coupled Logic (ECL), PCML is
the same as PECL (q.v. for explanation).
- PCN
- Personal Communication[s] Network.
- PCO
- Personal Consumption Outlays.
- PCO
- Pest Control Operator. There's a
service finder engine here, but
I don't think they can help you with your brother-in-law problems.
- PCO
- Point of Control and Observation.
- PCO
- PolyCystic Ovaries. Same as PCOD, infra.
- PCO
- Privy Council Office. I don't know what it is, but the Canadian Prime Minister has one. Sounds like a
large executive washroom.
- PCO
- Procuring Contracting Officer.
- PCOD
- PolyCystic Ovarian Disease. ``Stein-Leventhal Syndrome.''
Same as PCOS, infra.
- PCOS
- PolyCystic Ovarian Syndrome. Also called ``Stein-Leventhal Syndrome,'' for
the two who first identified it in 1905.
Well finally, a link!
- pCO2
- Partial Pressure of CO2.
- PCP
- Personal Care Professional. New improved name for a nursing assistant
(a/k/a nurse's aide). There's no systematic distinction between PCP and PCA, so far as I can tell in South Bend, Indiana, in
2005. Each of the major local hospitals uses only one of the terms.
PCP is probably the less accurate term, since nursing assistants are
low-skilled workers. On the other hand, since the 1970's in the US, a few
causes have led to shifts in health-care responsibilities: a shortage of
doctors in general practice, a severe shortage of nurses, and demands for
accountability arising from growth in the fraction of health care paid by some
form of insurance. Some routine diagnostic and prescription tasks that once
were the sole bailiwick of physicians are now often performed by registered
nurses, and various routine nursing duties are performed largely by nursing
assistants. (In the hazy, almost prehistoric, past, I seem to recall that they
were called orderlies.) The market for medical care has many dimensions, and
the profile of labor shortages should be noted: an aging population, smaller
families, and a higher labor-force participation of the daughters who
historically cared for parents have all led to a need for long-term maintenance
care. In the US as in Europe, a large fraction of this care is provided by
immigrants from LDE's.
The principal charm of the initialism PCP is that it is also used for the drug
of abuse known as ``angel dust.'' This would be a good place to note something
else connecting drug abuse and nursing, probably related to the fact that the
latter offers opportunities, some dangerous to patients, for the former. In
Indiana and probably every other place in the US, the state may refuse to allow
someone convicted of a drug felony from taking the state boards -- i.e.,
prevent that person from becoming a registered nurse.
- PCP
- PhenCyclidine. A veterinary anesthetic. Illegally used (schedule III) as
a hallucinogen, it has the reputation of making users violent. AKA ``angel
dust.''
Here's what the government
thinks. I have no idea what the second P stands for, but we have
enough PC expansions, so I don't mind if they just threw it in for
disambiguation.
- PCP
- Pneumocystis Carinii Pneumonia. An opportunistic secondary infection
common among those with compromised or weak immune systems -- principally AIDS sufferers, but also those taking
immunosuppressive drugs in conjunction with a transplant, the very young
and very old.
- PCP
- Primary Care Physician. Also `Principal Care Physician.' In HMO's, the PCP serves as a ``gatekeeper'' regulating
access to specialists. Increasingly, PCP's serve a similar function even in PPO's. Cf. PCM.
But worse: compare PCP.
I've seen many a bloody namespace collision in my time. In German it's
called a Namenskonflikt (namespace is Namensraum). If German
were a little more colorful here, we could call PCP a
medizinische Namensmassenkarambolage.
- PCPA
- (Canada) Pest Control Products Act.
- PCPhS
- Proceedings of the Cambridge Philological Society.
Journal catalogued by TOCS-IN.
According to a Classics-list
posting by the generally reliable Laval Hunsucker, there was an
article by Sydney Goldstein entitled Mathieu functions in the
Transactions of the Cambridge Philological Society. Hmmm.
It turns out that the Cambridge Philological Society did once
publish a Transactions, although the Goldstein article appeared in the
Transactions of the Cambridge PhiloSOPHICAL Society.
- PCPO
- Palestinian Center for Public Opinion. A
polling organization founded in 1994. The other major Palestinian polling
organization is PSR.
Elections are one of the few hard tests of the accuracy of polling, because
there are official results for comparison. The PCPO had such a test in 2006
and did quite poorly overall. A few things may be said in its defense, but
they require context...
In order to provide that context, I'm writing an analysis of the 2006 PLC
election, complete with irrelevant tangents. I haven't finished it, but it's
holding up other material on this page, so I'm publishing it incomplete now and
blaming the Israelis for any problems that may arise. By the time it's
finished, I'll have settled on a single name to use to refer to
district/first-past-the-post/winner-take-all/British-parliament-style
voting.
The Palestinian Legislative Council is essentially the Palestinian Authority's
parliament. The first PLC elections, in 1996, were conducted on a constituency
basis (district voting, ``first past the post''). The 2006 elections were held
under a new election law passed by the PLC on June 18, 2005. (Details for both systems
here. Each used 16 districts. The first PLC had 88 seats. After proving
his democratic bona fides with the 1996 election, chairman Arafat let
the elections thing kinda slide.) The 2006 elections implemented a mixed
system: some seats determined by district-voting for individuals, and some by
voting for lists (i.e., proportional representation).
In the case of the 133-member PLC elected in 2006, 66 seats were filled on a
constituency basis and 66 by proportional representation. (I think the
remaining seat is that of the President.) Ahead of the elections, it was
widely supposed that Fatah would retain the largest share of seats and that
Hamas would place second. PCPO conducted a careful poll of 2389 Palestinian
adults from January 18 to 21 to determine which lists they would support in the
PR vote. Out of 11 lists, the following six had the largest support:
Fatah: 39.6%
Hamas: 28.8%
Independent Palestine: 7.7%
Al Badeel: 7.2%
PFLP: 4.9%
Third Way: 4.7%
The polling was arranged to make the secrecy of the poll apparent: voters in
the survey marked a ballot and deposited it in a kind of vote box. Of the
ballots deposited, 3.3% were unmarked. Some notes on the lists:
- The Hamas list was technically the ``List for Change and Reform.''
Technically, Hamas itself was not participating in the election. A
distinction without much difference.
- The Independent Palestine list was headed by Dr. Mustafa Barghouti.
- Al Badeel or Al Badil, `The Alternative' list, was a
coalition of DFLP, the People's Party,
and ``FIDA.''
- The PFLP list was officially the ``List of Martyr Abu Ali
Mustafa.''
- The ``List of the Third Way'' was headed by Salam Fayyad and Hanan
Ashrawi.
The election took place on January 25, and it soon became clear that Hamas had
won an overwhelming victory. This suggested that pre-election polling had been
wildly wrong, but it exaggerates the error. Here
are the final results:
seats seats by total
by PR district seats Grouping
29 45 74 Hamas
28 17 45 Fatah
3 0 3 PFLP
2 0 2 Third Way
2 0 2 Al Badeel
2 0 2 Independent Palestine
0 4 4 (independent candidates)
-------------------------
66 66 132 Total
Preliminary estimates of the election commission
(CEC), based on 95% of the vote, originally gave
Hamas 76 seats and Fatah 43. Final results reassigned one list seat, and one
district seat in Khan Younis. Interestingly, 14 of those elected to the PLC
were in jails of the IOF, including the top
candidate of Fatah list -- Marwan al-Barghouthi, a West Bank Fatah leader
serving five life sentences. Evidently, in Palestinian elections harrowing the
flesh of Isaelis is a viable alternative to pressing the flesh of Palestinians.
(Another was reportedly in a Palestinian jail guarded by US and UK personnel.
Perhaps this report was garbled.)
It is apparent that Hamas did exceedingly well in district voting, while Fatah
and Hamas did comparably in PR voting. PCPO concentrated on polling for the PR
vote, and hence missed Hamas's greatest strength in the election. (I won't
comment much on the smaller parties: the sample was clearly too small to
measure their strengths accurately.)
An interesting question that I haven't seen adequately addressed is why Hamas
did so much better in district voting than in the PR vote. A possible answer,
or band of culprits,
was shouted in street demonstrations after Fatah's defeat: Fatah party members
who ran as independents in the district voting. Fatah's Revolutionary Council
had adopted a resolution the previous November 7 that barred Fatah party
members from running as independents in the district voting. Two days after
the election, PNA president and Fatah leader Mahmoud Abbas expelled six party
members for nominating themselves as independent candidates. I'm relying on
English translations of Arabic press reports, and the inconsistent patterns of
transliteration pose a problem in identifying candidates on the CEC lists. I
only found three of the expelled members on the lists of final returns.
Possibilities for the other three include having nominated themselves but
failed to get on the ballot and having names that are highly fungible under
transliteration. Here are the three I could track down, in decreasing order of
significance (more like increasing order of insignificance):
- Ahmed al-Deek ran in district 7 (Salfit), where 11 candidates
(one from each list) competed for one seat. Al-Deek ran third in a
relatively tight race. The winner, for Hamas, had 6762 votes, and the
Fatah candidate, in second place, had 5632. It is certainly plausible
that al-Deek, with 4957 votes, prevented Fatah from winning that seat.
List voting for the district was concentrated in the two top
vote-getters: Hamas drew 35.41% and Fatah 34.35%, while no other list
won more than 6.9%. The direct voting, by contrast, was concentrated
among the top three candidates, who drew 32.10%, 26.74%, and 23.53%.
The Hamas candidate underperformed relative to his list by a margin of
3.3%, but the Fatah candidate underperformed by 7.6%. (It should be
noted, though, that Fatah district candidates as a whole underperformed
relative to their list.)
- Fayez Zaidan ran in district 5 (Nablus), where 30 candidates
competed for 6 seats. Zaidan ran 23rd and won 2290 votes. The margin
of votes separating the sixth-place candidate (for Hamas) and the
seventh-place candidate (Fatah) was 1480, so it's conceivable that, had
he not run, Fatah might have won another seat. To argue that, however,
we must imagine that some voters disposed to vote for Fatah voted for
Zaidan rather than a non-independent Fatah candidate. It seems likely,
however, that his popularity with such voters would have drawn strength
from the four weaker Fatah candidates (ranging down to twelfth place)
rather than from the best-performing loser. (In each district, each
voter could cast at most one vote per candidate for up to n candidates,
where n was the number of district-selected seats alloted to the
district.) With so many candidates and such a muddy distribution of
votes, the best guess is that Zaidan had no effect on the final result.
- Burhan Jarrar ran in district 2 (Jenin), where 32 candidates
competed for 4 seats. Jarrar also ran 23rd, and he won 2040 votes. If
those votes are added to the votes of the other Fatah candidates, then
the most that changes, depending on how the votes are distributed, is
which two of the four Fatah candidates win seats.
District voting, at least for districts selecting a single candidate, is also
called ``winner take all'' voting. This points to one obvious explanation for
Fatah's relative weakness in the district voting: a slight Hamas advantage,
distributed evenly over various districts, was amplified by the nonlinear
winner-take-all function (a very real function of too many variables). There
are reasons why some nuts advocate proportional representation. But first,
let's analyze one of the extreme districts.
In district 13 (Gaza [city area]), 49 candidates ran for 8 seats. This was the
district in which Hamas had its best list showing -- 56.72%. It only ran five
non-list candidates, and these won the top five slots. There are small
technical difficulties in assessing the performance of candidates relative to
their lists, as the following numbers may indicate. Out of 174,379 registered
voters, 136,551 (78.31%) showed up and voted. Each received two ballots: one to
cast for one of the 11 lists, and one on which to select up to eight individual
candidates. A tiny percentage (0.53%, 719 total))
of the individual-candidate ballots were blank, and 3.00% (4097 ballots) were
invalid.
The remaining 131,735 ballots (at 96.47% the highest percentage of valid
nonblank ballots among the districts) contained a total of 977,959 votes for
individual candidates, for an average of 7.42 votes per ballot. Right away,
you realize there wasn't a lot of ``bullet voting.'' (I ought to make a joke
here. Ha-ha.) I've decided to regard 131,735 as the highest number of votes
that a candidate could win. Note, however, that 131,894 votes were cast for
lists. For Gaza, this is a 0.1% difference, but for other districts it is
typically 1-2%, and as much as 2.5% for district 1 (Jerusalem). In most
districts, not every list fielded individual candidates, so one could argue
that using a number like 131,735 (valid nonblank constituency ballots) inflates
candidates' percentages by discounting the abstentions of voters who didn't
have a candidate of their list to vote for, but this doesn't account for all of
the blank votes. (For Salfit, discussed above, I used the total number of
votes published for all candidates -- 21,066 -- yet the total number of
nonblank valid ballots for candidates was reported as 21,310 by the CEC, and
it's not apparent how to reconcile the discrepancy. Maybe it was write-ins.)
Using the denominator not justified in the preceding paragraph (131,735), we
find that the top five candidates (all Hamas) won from 57.6% to 53.0% of the
maximum of votes they could have won, comparable to their list's performance.
The next three candidates (all independents) had from 47.9% to 41.7%. The
eight Fatah candidates placed 9 to 16, ranking as well as they could without
winning any seats. (Actually ranking almost as well as they could
without winning seats. One seat was reserved for a Christian, and if the top
Christian candidate had not placed in the top eight, Fatah could have had a
candidate place eighth and still not win a seat.) The Fatah candidates won
from 33.8% to 25.6% of maximum, whereas the Fatah list won 36.64% of list votes
in the district. So in Gaza, individual Fatah candidates were 3 to 11 points
less popular than their list, while Hamas candidates were no more than 4% less
popular. (One might guess that partisans of other parties preferentially
settled for Hamas candidates, or that fans of independent candidates
preferentially chose Fatah in list voting. It would be hard to tell from these
data alone.)
- PCPS
- PCPhS. Vide supra.
- PCR
- Peak Cell Rate.
- PCR
- Polymerase
Chain Reaction.
Here's Perkin Elmer's starting page.
- PCR
- Program Clock Reference.
- PCRAM, PC-RAM
- Phase-Change Random Access Memory. A kind of nonvolatile
RAM currently (2008) being researched in which the
thermodynamic state of a small region of material encodes a bit. More
specifically, the ``phase-change material'' (such as GeSbTe) is toggled between
a semimetallic crystalline state and a semiconducting amorphous state. Readout
depends on the resistivity difference: the resistivity of amorphous GeSbTe is
at least two orders of magnitude greater than the resistivity, below 1 ohm-cm,
of the crystalline material.
- PCRM
- Physician's Committee for Responsible
Medicine. By ``resonsible medicine'' they mean health care that
promotes vegetarianism. This is different from modern medical research,
which promotes skipping the animal model stages in drug testing, and risking
humans first. That would be the MRMC's
goal.
- PCS
- Personal Communication[s] Service[s]. Designates the wireless systems in
development for a receive band of 1.93-to-1.99 GHz band, with 200 kHz channel spacing.
Distinguished from old-style cellular first by the fact that it's digital.
Intended initially for more urban (microcellular) environments; uses smaller
instruments than, and is supposed to be cheaper than, [analog] cellular.
Cf. next entry.
PCS-1900, as it's also called (from the band) is
GSM-compliant. It is one of two systems (the other
is D-AMPS) in widespread US use.
- PCS
- Personal Communication { System | Service }. The CDMA (non-GSM)
system developed by Qualcomm currently dominates digital cellular/PCS
services in North America. Cf. previous entry.
- pcs., pcs
- PieCeS. Plurals of pc. and pc, resp.
- PCS
-
Plastic Coding System. Of the Society of the
Plastics Industry, Inc. created to classify plastic containers for
recycling.
If this doesn't some familiar, visit the plastics section
of Recycler's World.
- PCS
-
Professional Communication Society of the IEEE.
``...to help engineers and technical communicators develop skills in written
and oral presentation.'' Sponsors the IPCC.
- PCS
- Public Charter School.
- PCSA
- Pet Care Services
Association. Previously known as the ABKA.
- PCS-1900
- Personal Communication Service in 1.9 GHz band.
- PCT
- Parity, Charge conjugation, Time-reversal. It is a fundamental theorem
of all credible fundamental theories of matter that all particle states are
invariant under the composition of these three symmetry transformations.
See R. F. Streater and A. S. Wightman: PCT, Spin and Statistics, and All
That, (New York: Benjamin, 1964).
- pct.
- PerCenT.
- PCT
- PolyCyclohexyl Terephthalate.
- PCT
- PostCoital Test. This is not a pregnancy test, but a microscopic
examination of cervical mucus to determine various dimensions of mucus-sperm
compatibility.
- PCTA
- PC Text-Assist.
- PCTE
- Portable Common Tool Environment. I don't understand this, and I don't
have to. If you have to,
there's help from FOLDOC.
- PCTF
- Per-Call Test Failures.
- PCTFE
- Poly(ChloroTriFluoroEthylene). A/k/a chlorotrifluoroethylene [plastic],
abbreviated CTFE.
- PC/TS
- Performance Criteria / Test Standard.
- PCTS
- Posix Conformance Test Suite.
- PCTV
- Partido Comunista de las Tierras Vascas. Spanish, `Communist Party of the Basque Lands.'
- PCTSCM
- Piezoelectric, Continuously Twisted, Structurally Chiral Medium.
- pcu
- Passenger-Car equivalent Unit[s].
- PCU
- Petra Christian University. In
Surabaya, Indonesia's second-largest city.
- pcu-km
- Passenger-Car equivalent Unit KiloMeter[s].
- PCUSA, PC(USA), PC/USA
- Presbyterian Church (U.S.A.).
- PCV
- (United States) Peace Corps Volunteer.
- PCV
- Plano-ConcaVe (lens). A lens with one
flat and one inward-curving face and a negative focal length, used to reduce an
image or as a dispersing lens (i.e., to spread a light beam).
Cf. PCX, DCV.
- PCV
- Positive Crankcase Ventilation. One-way exhaust of crankcase, achieved
through PCV valve.
- PCVS
- Point-to-point Switched Virtual Connections.
- PC Week
- ``The national newspaper of corporate computing,'' they bill themselves.
Homepage looks like a whole
magazine.
- .pcx
- PiCture eXchange. File extension and graphics format.
- PCX
- Plano-ConveX (lens). A lens with one flat and
one outward-curving face and a positive focal length, used to magnify an image
or as a condensing lens (i.e., to concentrate a light beam). Cf.
PCX, DCX.
- PCX
- Processor-Cache CROSSbar. These items are directional; a PCX controls
data flow from a processor to a cache; the other direction is handled by a
CPX.
- PCYMTNQREAIYR
- Please Configure Your Mailer To Not Quote Raw Email Addresses In Your
Replies.
- PD
- Packet Driver.
- PD
- Packetization Delay.
- Pd
- PallaDium. Atomic number? Yeah, it's got one. You want to know what it
is? I'm not sure you're allowed to know that. Oh, you know the big guy, eh?
Forty-six -- no more, no less.
Learn more without as much pain as pulling teeth at its
entry in WebElements and its
entry at Chemicool.
Palladium is one of the platinum group metals.
Palladium was discovered about the time the asteroid Pallas was discovered.
Whoop-de-do!
- PD
- Panic Disorder[s].
- PD
- Perphenazine Decanoate. Used to treat schizophrenia.
- PD
- Personality Disorder[s]. Tell me about it!
- PD
- Phase Detection.
- PD
- PhotoDesorption. Light-induced desorption.
- PD
- Photo-Detect{ion|or}.
- PD
- PhotoDiode.
- PD
- Physical Disability, Physically Disabled.
- PD
- Planar-Doped. Without the hyphen, you could think of ``planar'' here
as an adverb with form identical to the adjective's.
- PD
- Police Department. Productive suffix (e.g., NYPD).
- P.D.
- Post Datum. Latin, `after what is
given.' Used to introduce added comments in a letter, following the signature.
Equivalent to P.S., but P.D. is much more common in
Spanish-language correspondence.
- PD
- Professional Diploma. This is a sort of interstitial degree commonly
awarded in education. (You can understand that the Education field, dominated
by government employers, likes to have things be nice and official. See, for
example, this CRU entry.)
At Teachers College (TC), the PD represents
something between a Masters (M.Ed.) and a
doctorate (see Ed.D.). As such, I suppose you
could think of it as an official ABD. I'm sure it
stands for different levels of accomplishment (even of ostensible
accomplishment) at different institutions.
- PD
- (Broadcast) Programming Director.
- PD
- Protocol Discriminator.
- PD
- Public Domain.
- PD
- Pupillary Distance. The center-to-center distance between the pupils. For
most adults the PD in between 55 and 65 mm.
When prescriptions give two PD numbers, they may be the distances between the
bridge of the nose and the right and left eyes (in that order), so 32/30.5
implies that the PD in the usual sense is 62.5 mm. You know, the fish called
flounder start out life fairly symmetric and upright. As the fish matures and
lists to one side, the eye on the lower side shifts forward.
When two PD numbers are given and they are each around 60 mm, it probably means
that you have a swelled head. Oh wait, there's another possibility: it could
be the the distance PD and the reading PD. As you focus on things that are
closer up, your eyes cross and the PD decreases. A typical reading distance
is 33 cm, so if your distance PD is 60 mm, each of your eyes turns inward by
about 5 degrees when reading. If the distance from the center of your eye to
the center of its pupil is, say, 1.5 cm, then reading PD is 2 or 3 mm less than
distance PD.
- PDA
- Personal Digital Assistant. Here's
a bit from whatis.com.
- PDA
- PolyDiAcetylene.
- PDA
- Public Display[s] of Affection. This is typically performed by what may be
reasonably described as mutual very highly personal
digital assistants.
- PDA
- Public Displays of Alcohol[ism]. A useful term in the early 90's, at
damage assessment and control meetings for Beverly Hills 90201. (The
early 90's were the Brenda years -- Shannen Doherty played Brenda
Walsh, 1990-1994.)
Does she qualify as ``family friendly''?
Shannen Doherty was
the fourth ever Republican Babe of the Week. This achievement, or
whatever, is recognized by the
<JerseyGOP.com> website. The
weekly feature is not precisely dated, but I estimate that she won the honor at
the beginning of 2003, so I guess her public standing, if not her career, has
been rehabilitated. There doesn't seem to be a corresponding Democratic site,
but I believe there may be one or two nonpartisan weekly babe sites on
the web. It is hard to sort through all the hits if you search too broadly on
"babe" and "party".
A search for physics babes turned up a
lot of hits for the Department of Theoretical
Physics, Babe¸s-Bolyai.
- PDAI
- Perianal Disease Activity Index. Ever since I decided against becoming a
gastroenterologist or a proctologist, I've never looked back.
- PDB
- ParaDichloroBenzene.
- PDB
- Planar-Doped Barrier. As in ``PDB diode,'' and ``PDB transistor.''
- PDB
- Protein DataBank.
- PDC
- Participatory Design Conference. First held in 1990. Biennial.
- PDC
- Partido Democrático Cristiano. The largest political
party in Chile, part of the dominant Concertación.
- PDC
- Personal Digital Cellular. A digital cellular standard developed in Japan
for use in 800 MHz and
1.5 GHz bands.
- PDC
- Primary Domain Controller. Used in NTFS for
Windows NT.
- P&DC
- Processing and Distribution Center. Most nonlocal
mail sent in the US goes unsorted to a P&DC, also called a ``sectional
center,'' which cancels mail (the P&DC's ink goes on the stamp), sorts it
and redistributes it for eventual delivery. Had to get that word
eventual in there.
- PDCA
- Plan, Do, Check, Action. Sequence of management steps to be repeated
(``the PDCA Cycle''). A statement of the obvious, ostentatiously described as
an adaptation of the Deming wheel (don't look). Next lesson: SDCA.
My adaptation of PDCA is PDCA: ``plan, do, check, act.'' Hey, lookit me --
I'm doin' kaizen!
- PDD
- Pervasive Developmental Disorder.
- PDD
- Physical Device Driver.
- PDD
- Presidential Decision Directive. US governmentese.
- PDDNI
- Principal Deputy Director of National (US) Intelligence.
- PDDP
-
Parallel Data Distribution Preprocessor. A data parallel programming model
implemented on two parallel platforms at LLNL.
- PDE
- Partial Differential Equation. `Partial' refers to the presence of
partial derivatives, used to specify the direction of differentiation in
a multi-dimensional space of independent variables. Cf.
ODE.
- PDE
- (Resonant) Photon Drag Effect. Large electron momentum shifts, and
associated induced currents, due to radiatively induced intersubband
transitions in semiconductors, first predicted by A. A. Grinberg,
E. D. Belorusets and E. Z. Imamov, Fiz. Tekh. Poluprovodn.,
vol. 5, pp. 2010ff (1971) [Eng. trans.: Sov. Phys. Semicond.,
vol. 5, pp. 1748ff (1972)].
A number of analogous effects in differrent systems are called light-induced
drift (LID).
- PDE
- Professional Disposition Evaluation. A letter grade evaluating the
political correctness of students enrolled in
Wazoo's College of Education.
- PDF
- Pair Distribution Function.
- PDF
- Panamanian Defense Forces.
In 1989, the US took military action to topple Panamanian dictator Gen. Manuel
Noriega. On Christmas Eve, he took refuge at the Papal Nunciature in Panama
City (i.e., in the Vatican's embassy, which also serves as the residence
of the papal nuncio). There was some irony in this, as the nuncio had been a
vocal critic of Noriega, and the nunciature had provided sanctuary for many
persecuted by Noriega's régime. During the invasion, US troops
discovered a house that Noriega had used for witchcraft. According to a
Christmas pageant of sorts presented by U.S. Army specialists, a Brazilian
witch and a variety of elaborate rituals were used to cast magic spells on
numerous political enemies, including Ronald Reagan, George H.W. Bush and the
entire U.S. Congress, Guillermo Endara (the man who had been elected Panamian
president earlier in 1989, but prevented from taking office), and the papal
nuncio, Monsignor Juan Sebastian Laboa. (This is a very incomplete inventory.)
According to Italian news reports, 32 Noriega supporters also took refuge with
the nuncio.
Beginning on December 27, members of a psychological warfare team from the 82nd
Airborne Division played loud rock music over (initially two) powerful
loudspeaker units positioned across the street from the nunciature. The music could be heard
blocks away. One of the songs played was Judas Priest's ``You're Going to Burn
in Hell.'' The first day's program lasted five hours and also included
selections from the Rolling Stones, David Bowie (``Modern Love''), the Who
(``We're Not Gonna Take It''), and the Grateful Dead, followed (according to
one report) by rap music.
The next day's set featured repeated playing of ``Nowhere to Run,'' a hit for
Motown's Martha Reeves and the Vandellas in 1965.
The music programs grew longer. Conflicting, or at least multiple,
explanations were given of what purpose the performance served. Noriega was
reputed to favor opera. The legality of the music offensive, like that of many
aspects of Noriega's stay, was not clear. By the 29th, those who thought it
was legal nevertheless generally agreed that the joke wasn't funny anymore, and
the psyop was terminated. Noriega surrendered to
US forces the following January 3. (After conviction on drug charges in
Florida, he was sentenced to forty years in federal prison. This was later
reduced to thirty, and he is first eligible for parole in 2006.)
In 1994, a constitutional amendment (title xii,
article 305) was passed that abolished the standing army (another Central
American country, Costa Rica, had many years previously abolished its standing
army in the aftermath of a civil war). Panama retains ``security forces''
(PPF).
When Barbara Streisand married James Brolin at her Malibu estate in 1998, she
didn't want paparazzi to so much as hear the wedding, never mind see.
For four hours she blasted the press with continuous playing of ``Thunder Kiss
'65,'' a heavy metal song (?) recorded by
Rob Zombie in 1992 with his band White Zombie. Zombie took no offense. He
said ``[h]opefully, the Funny Lady will use a track off my new album,
Hellbilly Deluxe, to ward off meddling paparazzi at her divorce
hearing.'' ``At least it isn't Streisand music,'' commented a reporter on the
scene.
At that time, Rob Zombie claimed that some of his music was blasted at Noriega
and the nuncio in 1989. So far as I have been able to determine, that was the
first time that anyone publicly claimed that recognition for Zombie. I have
searched LexisNexis (including entertainment news), and the artists and titles
listed earlier are all I was able to reconstruct of the playlists from
newspaper and wire reports. Perhaps it's a military secret. In Time
(for Jan. 8, 1990: Vol. 135, Issue 2) the cover story ``No Place to
Run'' (G.J. Church, R. Chavira, pp. 38ff) added the information that ``Voodoo
Chile'' [Jimi Hendrix] and ``You're No Good'' [Van Halen] were played. Did Rob
Zombie really rank in this company?
- PDF
- Parkinson's Disease Foundation.
- PDF
- Pig Dog Farm. ``Offering simple,
honest, top-quality handcrafted stuff & supplies at down-to-earth prices.''
(With all those properly-deployed hyphens, how could I resist linking?) They
sell handmade soap, knitting patterns, and
soapmaking supplies.
- PDF
- Polar Density Function.
- PDF, .pdf
- Portable Document Format. Adobe® Acrobat® format. In ordinary
text (i.e., in uses other than filename extensions or directory names),
the acronym is almost universally capitalized. A PDF viewer for the Symbian OS
is Pdf+.
- PDF
- Post-Doctoral Fellow[ship].
- PDF
- Pretty Da{ m | r }n Fast.
- p.d.f., pdf, PDF
- Probability { Distribution | Density } Function.
- PDG
- Pendant Drop Growth. I watch this process occur on the end of my nose
when I get out of the shower.
- PDG
- Président-directeur général.
French title equivalent to
CEO.
- PDH
- Plesiochronous Digital Hierarchy. Old-style asynchronous multiplexing.
- PDIC
- Professional Diving Instructors Corp.
- PDIP
- Plastic Dual In-line Package.
- PDI-P
- Payload Defect Indicator -- Path.
- PDI-V
- Payload Defect Indicator -- Virtual.
- PDK
- Phi Delta Kappa International. It
doesn't seem to stand for any particular words, in Greek or any other language,
so you might as well use ``pretty darn kooky'' as the mnemonic. It styles
itself ``The Professional Association for Educators,'' but it allows
administrators to be members. This is worse than allowing a few managers into
a workers' union, because school systems are top-heavy with nefarious educrats.
Here's a page with their New
Year's resolutions, stacked up a couple of years in advance. As of January
2004, the first thing reported in their mission statement (in an appositive
phrase; it's a fact rather than a mission component) is that PDK is now
``the leading advocate for public education.'' Further down the page, the
first of the strategic goals listed is that ``[b]y 2006, PDK will be
recognized as the leader in advocacy for public schools and the education
profession. Well then, I guess it's just a question of getting the word out.
Also, one of the first bullets under strategies reads:
``Advocacy. We will develop and implement plans to advocate for public
education and the education profession. NOTE: To be recognized as the
leading advocate, PDK will consider collaboration with other professional
groups.
- PD&L
- Professional Development & Learning.
- PDLC
-
Polymer-Dispersed Liquid Crystal.
- PDLD
- Polymer-Dispersed Liquid-crystal Display. Explained
here.
- PDM
- Pulse-Duration Modulation. Also Pulse-Density Modulation.
PWM is the acronym I hear more frequently.
- PDMF
- Present-Day Mass Function.
- PDMS
- Plasma-Desorption Mass Spectrometry.
- PDMS
- PolyDiMethylSiloxane. A transparent elastomer that can be poured over a
microscopically patterned mold, polymerized, and then removed simply by peeling
it off of the mold substrate. This isn't of any particular utility -- it's
just a lot of fun. That's probably why it's so popular in industry.
- PDN
- Public Data Network.
- PDO
- Pacific Decadal Oscillation.
- PDO
- Plasma-Deposited Oxide.
- PDO
- Private Development Organization. One kind of NGO, q.v.
- PDOS
-
Purple
Dinosaur
Operating System.
Not
this purple dragon.
Here are some satirical sound files.
- PDP
- Parallel Distributed Processing.
- PDP
- Plasma Diagnostics Package.
- PDP
- Plasma Display Panel. (Once, plasma diplay meant ten-digits in neon
bulbs. Now there are VGA plasma panels.
Here's one from Fujitsu.)
- PDP
- Policy Decision Point. Management is a mathematically precise science.
Cf. PEP.
- PDP
- Power-Delay Product.
Carl Gustav Jung (1875-1961) wrote (in Über die Psychologie des
Unbewussten [`On the Psychology of the Unconscious'] 1917):
Wo die Liebe herrscht, da gibt es keinen Machtwillen, und wo die Macht
den Vorrang hat, da fehlt die Liebe. Das eine ist der Schatten des
andern.
[`Where love rules, there is no will to power, and where power predominates,
love is missing. The one is the shadow of the other.']
It's the same in electronics: many of the simple things you can do to
decrease power consumption also increase delay times, and vice
versa. (To take a trivial example, increasing a load resistance
in a simple BJT inverter decreases power
dissipation in the output-low state, and increases RC time delay
by the same factor: power goes as V²/R, delay as RC.) Thus, while
power and delays are easily adjusted individually (or inadvertently
affected by fabrication variances), the product of power dissipation and
a representative delay like the average propagation delay does not budge
so easily, and constitutes a good figure of merit.
In the foregoing analogy, Love is Delay.
- PDP
- Professional Developer's Program.
- PDP-
- Programmed Data Processor. Prefix for a sequence of computers manufactured by Digital Equipment Corporation. Especially, PDP-11, PDP-10, -8.
- PDQ
- Personality Diagnostic Questionnaire. Also Personality Disorders
Questionnaire.
- PDQ
- Pretty Da{ m | r }n Quick.
- PDQ
- Public Diplomacy Query. Performed on a database of the USIA.
- PDQ Bach
- Johann Sebastian Bach had twenty children, of whom ten survived infancy.
This one evidently didn't survive its falopian tube.
- PDR
- Phase-Delay Rectifier.
- PDR
- Photon-Dominated Region.
- PDR
- Physicians' Desk Reference.
- PDR
- Pitch-to-Diameter Ratio. (``Pitch'' here is the separation between
adjacent threads of a screw.)
- PdR
- Playa del Rey. Abbreviation in California classified ads, particularly in The Argonaut, for
over twenty years (could be since 1970, in fact) ``[y]our best source
of local information for Marina del Rey, Venice, Westchester, Santa
Monica and Playa del Rey. Cf. MdR.
- PDRY
- People's Democratic Republic of Yemen. Old South Yemen. For a change, the
communist Asian country claiming to be the whole country was the southern part
of the country. The two united in 1990; see .ye entry.
- PDS
- Partei des demokratischen Sozialismus. `Party of democratic
socialism.' Redefined former communist party of East
Germany (see SED). They came in just
above the cut-off in the 1998 general elections, winning 5.1% of the vote and
being allocated 35 (out of 669) Bundestag seats. In 2002 it sank to 4% and had
no Bundestag seats.
In most former Comecon countries of Central
Europe, communist parties have survived and sometimes held power by taking a,
well, less communist economic position, adopting mixed-economy or even somewhat
neoliberal views. The situation of reunited Germany, and of the PDS, is
exceptional. The strength of the PDS continued to be in the Länder
(`states') of the former GDR; even after 2002, the PDS retained
representation in eastern Landtage (`state parliaments').
At one point it was thought that the PDS and the Greens might merge to form a
more viable party. The motivation on both sides presumably was the declining
individual electoral strength of each. The Greens were drifting a little bit
rightward economically, however, and that merger did not occur. Instead, in
2005, the PDS merged with dissenting former socialists to form the
Linkspartei.
- PDS
- Philips Development System.
- PDS
- PhotoDischarge Spectroscopy.
- PDS
- Photothermal Deflection Spectroscopy.
- PDS
- Planar { Diffusion | Dopant } Source. Solid dopant source in the form
of a wafer, stacked in alternating sandwich structure with wafers to be
doped, the whole stack heated in a furnace. This is usually done with
silicon wafers and, say, a boron dopant (using BN wafers with a witch's
brew of other stuff). Why doesn't someone try this with garlic-doping of
pizza?
- PDS
- Premises Distribution System. Wiring system from
AT&T.
- PDTA
- DiaminoPropaneTetraacetic Acid. Obviously, it's not called DPTA to avoid
confusion. Usually, PDTA means 1,2-PDTA. Basically, this is
1,2-diaminopropane with acetic acid groups substituted for the hydrogens on the amine groups.
- PDU
- Packet Data Unit. Conflation of OSI-defined
PDU expansion (Protocol Data Unit) with its
synonymn, packet.
- PDU
- Process Development Unit.
- PDU
- Protocol Data Unit. OSI synonym of packet.
- PDV
- Peculiar Dorsal Vertebra[e]. The first dorsal vertebra, and ninth
through twelfth inclusive, are peculiar. It doesn't bother me. (I have
no idea whether anyone uses this acronym. I rather prefer to hear the
expansion.)
- PDX
- Microsoft PC Paint Brush (graphics format).
(