Half-period ratio - Factbites

Half-period ratio - Factbites
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Topic: Half-period ratio

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	Weierstrass's elliptic functions - Wikipedia, the free encyclopedia
		The sigma-function has zeroes at all the period points (only), and can be expressed in terms of Jacobi's functions.
		Further development of the theory of elliptic functions shows that the condition on Weierstrass's function (correctly called pe) is determined up to addition of a constant and multiplication by a non-zero constant by the condition on the poles alone, amongst all meromorphic functions with the given period lattice.
		Riemann surface, and regard the elliptic functions associated to a given pair of periods to be functions defined on that Riemann surface.
	en.wikipedia.org /wiki/Weierstrass's_elliptic_functions

	PERIOD - Definition
		Note : The period, according to Heyse, is a compound sentence consisting of a protasis and apodosis ; according to Becker, it is the appropriate form for the co [" o ] rdinate propositions related by antithesis or causality.
		Periods are beautiful when they are not too long.
		Hence : A stated and recurring interval of time ; more generally, an interval of time specified or left indefinite ; a certain series of years, months, days, or the like ; a time ; a cycle ; an age ; an epoch ; as, the period of the Roman republic.
	www.hyperdictionary.com /dictionary/period

	Norfolk Southern Reports Second-Quarter, First-Half Results
		For the quarter, the railway operating ratio improved 2.5 percentage points to 79.8 percent compared with 82.3 percent in the same period of 2001.
		For the comparable period of 2001, net income was $181 million, or $0.47 per diluted share, and included an after-tax gain of $13 million, or $0.03 per diluted share, related to the 1998 sale of Norfolk Southern's former trucking subsidiary.
		Railway operating expenses were $1.27 billion for the quarter, down three percent compared to second quarter 2001, and $2.53 billion for the first six months, down four percent compared to the first half of last year.
	www.nscorp.com /nscorphtml/releases02/earn2-02.html

	CATHOLIC ENCYCLOPEDIA: Ratio Studiorum
		Some writers have asserted that the Ratio prescribed Latin because it was the language of the Church, and of political and scholarly intercourse of former centuries, and that for this reason the perfect mastery of Latin, the acquisition of a Ciceronian style, was the primary aim of Jesuit education.
		From this it is clear that it is not the intention of the Society to make the Ratio Studiorum stationary and binding in every detail; on the contrary, it is intended that the educational system of the order shall adapt itself to the exigencies of the times.
		All these men were trained under the Ratio, and, though it would be puerile to claim all their greatness for the system of education, one thing is certain, namely that the Ratio did not crush the originality and individuality of these pupils, whether members of the order of outside it.
	www.newadvent.org /cathen/12654a.htm

	Electric Field-Induced Changes in Lipids Investigated by Modulated Excitation FTIR Spectroscopy -- Schwarzott et al. 86 (1): 285 -- Biophysical Journal
		Due to the slow heat exchange in the transmission cell the modulation period had to be extended from 0.8 s in case of E-ME to 10.68 min for T-ME. The temperature was modulated by ± 0.2° around the mean value of 28.4°C, i.e., just within the range of uncertainty of the temperature control.
		Always after eight scans the relay (S) was switched alternatively on and off, controlled by a TTL signal produced in the spectrometer, thus connecting the cell periodically to the stimulating potential.
		period of the T-ME measurements was 10.68 min.
	www.biophysj.org /cgi/content/full/86/1/285

	Display device having a liquid crystal - United States Patent 4,342,994
		Advantageous embodiments of a display device according to the invention are characterized in that either one row selection period is equal to at least one full period of the pulsating direct voltage, or that the duration of half a period of the pulsating direct voltage is equal to one or more full row selection periods.
		It is sufficient when half a period of C.sub.2, and consequently of V.sub.B and V.sub.C, is equal to a whole number of selection periods, provided C.sub.2 in ON in 50% and OFF in 50% of the cases for corresponding selection periods of different full picture cycles.
		The inputs 45 and corresponding inputs are set to "ON" during the second half of that selection period during which the corresponding selection conductors have been selected and during the first half of all the further selection periods during which the corresponding selection conductor is not selected.
	xrint.com /patents/us/4342994

	Half-period ratio - Wikipedia, the free encyclopedia
		Note that the half-period ratio can be thought of as a simple number, namely, one of the parameters to elliptic functions, or it can be thought of as a function itself, because the half periods can be given in terms of the
		In mathematics, the half-period ratio τ of an
	en.wikipedia.org /wiki/Half-period_ratio

	Period 5
		The Management Ratio is determined by dividing GSA's performance by the CDA.
		The period just ahead of the 1987 Crash offer many opportunities to learn.
		According to the survey of 82 major investment managers, with more than 228 billion in assets under management, the advance in equity prices should continue, albeit at a slower pace than during the first half of 1987.
	www.isi-su.com /period5.htm

	home page
		Period 3: Pg 308 #11-18, 21, 22, 25, 26
		Period 4: Pg 201 #9-10, 13-14, 24-31, 39-40
		Period 4: Pg 308 #11-18, 21, 22, 25, 26
	email.plainvilleschools.org /~tagliab

	FS Ancient Mysteries Article: The Sacred And Mysterious Tau
		t is the half-period ratio of an elliptic function.
		I have always thought that the MMM had an unusual look about it even after I discovered that it was a Half Simian/Half Lion Face Terraform.
		t is used as an alternate notation for the GOLDEN RATIO.
	www.100megsfree4.com /farshores/a04mm.htm

	The Sharpe Ratio
		In the original applications of the ratio, where the benchmark is taken to be a one- period riskless asset, the differential return represents the payoff from a unit investment in the fund, financed by borrowing.
		While such a "return information ratio" may be useful as a descriptive statistic, it lacks a number of the key properties of what might be termed a "differential return information ratio" and may in some instances lead to wrong decisions.
		For completeness, it should be noted that Treynor and Black used the term appraisal ratio to refer to what we term here the SR of a component and the term Sharpe Ratio to refer to the SR of the portfolio, although other authors have used the latter term for both the portfolio and its components.
	www.stanford.edu /~wfsharpe/art/sr/sr.htm

	UAH PHYSICS 113 "Preflight25")
		, in an interval of three half-life periods
		Then when a tree or an animal dies, no more C-14 goes in, and the ratio of "normal" C-12 to C-14 starts to change by the built-in radioactivity clock.
		A much more accurate method has replaced it, which uses a mass spectrometer to directly count the ratio of C-14 to C-12, and precisely date the item to within 1%.
	www.rbsheldon.com /PHY113/QZ25.html

	III - 2004 - First Half Results
		Gains in insurer investment performance during the first half were driven by a combination of higher interest rates, small gains in the stock market, the realization of accumulated capital gains from prior periods and by an increase in invested assets boosted by improved cash flow.
		The fact that the industry’s average return on surplus is an estimated 13.1 percent, despite a combined ratio of just 94.4 during the first half, is a stark reminder that a renewed commitment to underwriting and pricing discipline are needed if the industry hopes to maintain Fortune 500 rates in 2005.
		The first half combined ratio of 94.4, put insurers on a trajectory toward the best underwriting performance since the early 1950s and the year’s underwriting profit seemed destined to reach an all time record of approximately $18 billion (annualizing the 6-month result of $9.0 billion).
	www.iii.org /media/industry/financials/2004firsthalf?printerfriendly=yes

	Computing Class Rank and Honor Roll
		This is added to the three-year cumulative quality point total, and this number is divided by the total number of credits attempted during the three and a half year period.
		The students are then assigned a rank by their quality point ratio.
		At midyear, seniors’ midyear grades are averaged and converted to one-half the Weighted Point System.
	www.ehhs.org /classrankhonorroll.htm

	FDIC: BIF Assessment Rates for the Second Seminannual Assessment Period of 2002
		This would comport with the intent of this provision of section 7 that the FDIC be given one year (i.e., two semiannual periods) to increase the reserve ratio to the designated reserve ratio without being required to impose the minimum assessment of 23 basis points.
		These factors directly affect the reserve ratio prospectively and thus are considered as elements of the requirement to set rates to maintain the reserve ratio at the target DRR.
		Overall, the supervisory subgroup assignment was upgraded since the previous period for 118 institutions with an assessment base of $18.5 billion and was downgraded for 157 institutions with an assessment base of $33 billion.
	www.fdic.gov /deposit/insurance/risk/bif2002_02.html

	American Re Reports Second Quarter and First Half Results
		The subsidiaries' GAAP combined ratio was 100.8% for the six months ended June 30, 1998, compared to 100.7% for the same period in 1997.
		The Company attributes this increase in its combined ratio for the 1998 period to an increase in the other underwriting expense ratio, which occurred primarily as a result of the decrease in premiums earned.
		The Company's GAAP combined ratio was 102.2% for the second quarter of 1998, compared to 100.5% for 1997.
	www.amre.com /content/finance/2q98.html

	Rapid expansion of OTC derivatives market in the second half of 2001 (BIS Press Releases 15 May 2002)
		In the previous half-yearly period, the stock of OTC contracts had only increased by 5%, while that of exchange-traded contracts had risen by nearly 40%.
		This compares with a 5% increase in the previous half-year period.
		Business in interest rate products was brisk in the second half of 2001, with a 15% rise in outstanding contracts to $78 trillion.
	www.bis.org /press/p020515.htm

	Shirky: A Group Is Its Own Worst Enemy
		There are, however, I think, about half a dozen things that are broadly true of all the groups I've looked at and all the online constitutions I've read for software that supports large and long-lived groups.
		But it was my original interest, so I've been looking at this problem in one way or another for 10 years, and I've been looking at it pretty hard for the a year and a half or so.
		Assume these as a kind of social platform, and then you can start going out and building on top of that the interesting stuff that I think is going to be the real result of this period of experimentation with social software.
	www.shirky.com /writings/group_enemy.html

	Ident1P11Soln.html
		The period looks to be around 34 seconds (from 17 to 34 sec for one half period.) That gives a natural frequency:
		That means that the damping ratio is about
		The overshoot is about 30% since the peak is around 2.6 and the steady state value is 2.0.
	www.facstaff.bucknell.edu /mastascu/eControlHTML/Problems/Ident/Ident1P11Soln.html

	User:Linas - Wikipedia, the free encyclopedia
		Dirichlet characters and L-functions enter the picture is because iterated functions have periodic or almost-periodic orbits, and periodicity is naturally described in terms of the cyclic group.
		Quarter period - Nome (mathematics) - Elliptic integral -
		Discrete Laplace operator - Upper half plane - Christoffel symbols
	en.wikipedia.org /wiki/User:Linas

	Howstuffworks "How Pendulum Clocks Work"
		In this diagram the escapement gear has 120 teeth, the pendulum has a period of half a second and the second hand is connected directly to the escapement gear.
		As discussed in How Gear Ratios Work, you can create a high-ratio gear train that causes the drum to make perhaps one turn every six to 12 hours.
		Each gear in the weight's gear train has an 8:1 ratio, so the full train's ratio is 492:1.
	home.howstuffworks.com /clock4.htm

	Dimah's Home Page [High Cholesterol]
		It was found that exercising daily or at least three times per week for a period of half an hour or more, increase the ratio of the good cholesterol.
		Recent studies have found that grilled or boiled fish and sea food are rich of unsaturated fat which helps in reducing the ratio of the bad cholesterol.
		In the other hand, it is dangerous to have more of LDL's in te blood as it remains in the veins and cause a block.
	www.geocities.com /nutritionwebsite/cholesterol.html

	bit projects archive
		The HALFLIFE RATIO is an economic indicator that tracks the market value of sperm and the market value of ova, and compares the two.
		The BIT halflife ratio collects this publicly available data on sperm and ova and transposes it from the statistical realm into an animated, much more "Discovery Channel" kind of genre.
		The Golden Gate Bridge is the premiere suicide destination in the United States: a 100 day initial deployment period of the BIT Suicide Box recorded 17 vertical events (during the same time period the Port Authority counted only 13).
	pzwart2.wdka.hro.nl /bit/research/projects.html

	Maybe this can forecast the market trend... best Half-Period Ratio
		Hal f- Period Ratio -- from MathWorld Half - Period Ratio -- from MathWorld \tau is the ratio \tau=\omega_1/\omega_2 of the two half -periods \omega_1 and \omega_2 of an elliptic function (Whittaker and Watson 1990, p.
		They can be defined using the half - period ratio tau or the nome...
		is the half - period ratio of an elliptic function...
	www.ascot.pl /th/Fourier4/Half-Period-Ratio.htm

	George P. Shpenkov
		Following the same logic, which led to the formula (1.1), we should to announce the ratio of amplitude of displacement of a pendulum to the period of its oscillations as the average speed of its motion, but it is absurdity.
		Simultaneously, the same motions in outer space, as mutually relative ones, are opposite-directed; and one revolution of the electron is equivalent to one-half period (Fig.
		Two (coinciding in our case) states of the beginning and the end of the period is the inherent feature of any periodic functions without which there is no period.
	shpenkov.janmax.com /spin.asp

	How to find signals in noise using estimation
		By the way, in case you're wondering, the noise in Figure 1 hides a unit-amplitude, half-cycle sine wave; the signal-to-noise ratio (SNR) is "2.45dB.
		The average error of the estimate decreases as a power of the number of samples and also decreases with increasing signal-to-noise ratio.
		Figure 1's peak amplitude, estimated using the techniques presented in this article, is 0.986 with an error of 1.4%.
	www.embedded.com /shared/printableArticle.jhtml?articleID=14400097

	UUSS - Glossary of Terms
		viscoelastic A type of deformation in which a material behaves like an elastic solid when it is rapidly strained on time scales of seconds to hours, but deforms viscously by plastic flow over long periods of geologic time.
		period (wave) The time interval required for one cycle of a wave.
		phase A stage in a periodic motion measured with respect to a reference and expressed in angular measure.
	www.seis.utah.edu /qfacts/glossary.shtml

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