Results 1  10
of
625,414
Unexpected Results in Online Controlled Experiments
"... Controlled experiments, also called randomized experiments and A/B tests, have had a profound influence on multiple fields, including medicine, agriculture, manufacturing, and advertising. Offline controlled experiments have been well studied and documented since Sir Ronald A. Fisher led the develop ..."
Abstract

Cited by 3 (2 self)
 Add to MetaCart
control) and running experiments on large server farms with millions of users. We share several real examples of unexpected results and lessons learned.
Quantum Black Holes:Unexpected Results
, 1998
"... The quantum black hole model with a selfgravitating spherically symmetric thin dust shell as a source is considered. The shell Hamiltonian constraint is written and the corresponding Schroedinger equation is obtained. This equation appeared to be a finite differences equation. Its solutions are req ..."
Abstract
 Add to MetaCart
The quantum black hole model with a selfgravitating spherically symmetric thin dust shell as a source is considered. The shell Hamiltonian constraint is written and the corresponding Schroedinger equation is obtained. This equation appeared to be a finite differences equation. Its solutions are required to be analytic functions on the relevant Riemannian surface. The method of finding discrete spectra is suggested based on the analytic properties of the solutions. The large black hole approximation is considered and the discrete spectra for bound states of quantum black holes and wormholes are found. They depend on two quantum numbers and are, in fact, quasicontinuous. The quantum black hole bound state depends not only on mass but also on an additional quantum number, and black holes with the same mass have different quantum hairs. These hairs exhibit themselves at the Planckian distances near the black hole horizon. For the observer who can not measure the distances smaller than the Planckian length the black hole has the only parameter, its mass. The other, nonmeasurable, parameter leads to the quantum corrections to the black hole entropy. The quantum states with given mass are the mixed ones. It is shown that there exists the ground quantum black hole state with minimal mass equal approximately the Planckian mass. Its quantum state has zero entropy and it is a pure state. The existence of the quantum hairs may solve (at least partially) the well known information paradox in the black hole physics.
One of the most exciting and unexpected results...
, 2000
"... Accepted..... Received....; in original form.... UBVRIJ photometry and optical spectra of the Type Ia SN 1996X obtained at ESO during a oneyearlong observational campaign are presented, and supplemented by late time HST photometry. Spectroscopically, SN 1996X appears to be a ‘normal’ SN Ia. The ap ..."
Abstract
 Add to MetaCart
Accepted..... Received....; in original form.... UBVRIJ photometry and optical spectra of the Type Ia SN 1996X obtained at ESO during a oneyearlong observational campaign are presented, and supplemented by late time HST photometry. Spectroscopically, SN 1996X appears to be a ‘normal’ SN Ia. The apparent magnitude at maximum was B = 13.24 ± 0.02, and the colour B − V = 0.00 ± 0.03. The luminosity decline rate, ∆mB(15) = 1.31 ± 0.08, is close to average for a SN Ia. The best estimate of the galactic extinction is AB = 0.30 ± 0.05, and there is evidence that reddening within the parent galaxy is negligible. Detailed comparison of the light and colour curves of various ‘normal ’ SNe Ia shows that the assumption that multicolour light curves can be described simply as a oneparameter family is not perfect. Together with problems in the calibration of the templates, this may explain the discrepancies in the distance modulus derived adopting different calibrations of the absolute magnitude vs. light curve shape relations. Indeed we found that MB ranges from −19.08 to −19.48 and µ range from 32.02 to 32.48
Unexpected Results in Automatic List Extraction on the Web
"... The discovery and extraction of general lists on the Web continues to be an important problem facing the Web mining community. There have been numerous studies that claim to automatically extract structured data (i.e. lists, record sets, tables, etc.) from the Web for various purposes. Our own recen ..."
Abstract

Cited by 4 (2 self)
 Add to MetaCart
The discovery and extraction of general lists on the Web continues to be an important problem facing the Web mining community. There have been numerous studies that claim to automatically extract structured data (i.e. lists, record sets, tables, etc.) from the Web for various purposes. Our own recent experiences have shown that the listfinding methods used as part of these larger frameworks do not generalize well and therefore ought to be reevaluated. This paper briefly describes some of the current approaches, and tests them on various listpages. Based on our findings, we conclude that analyzing a Web page’s DOMstructure is not sufficient for the general list finding task. A B
An Unexpected Result of Obesity Treatment: OrlistatRelated Acute
, 2015
"... www.karger.com/crg This is an Open Access article licensed under the terms of the Creative Commons AttributionNonCommercial 3.0 Unported license (CC BYNC) (www.karger.com/OAlicense), applicable to the online version of the article only. Distribution permitted for noncommercial purposes only. ..."
Abstract
 Add to MetaCart
www.karger.com/crg This is an Open Access article licensed under the terms of the Creative Commons AttributionNonCommercial 3.0 Unported license (CC BYNC) (www.karger.com/OAlicense), applicable to the online version of the article only. Distribution permitted for noncommercial purposes only.
HighFrequency Performance Monitoring Produces unexpected results.
"... We know that investors emphasize past investment returns when thy make investment decisions. Goetzmann and Ibbotson say that “for most clients, questions about the money manager’s [performance] record are among the first …asked ” [1994]. The economic consequences of investors ’ reliance on past perf ..."
Abstract

Cited by 1 (0 self)
 Add to MetaCart
We know that investors emphasize past investment returns when thy make investment decisions. Goetzmann and Ibbotson say that “for most clients, questions about the money manager’s [performance] record are among the first …asked ” [1994]. The economic consequences of investors ’ reliance on past performance are clearly demonstrated in past research. Mutual fund inflows are strongly related to past performance. Ippolito [1992] finds that money is allocated to recent good oneyear return performers. Confirming this evidence, Gruber [1996] and Sirri and Tufano [1998] find that fund inflows are highly dependent on good past performance. Industry surveys reveal that pension fund outflows are to a major extent driven by poor past performance. The reliance on past performance has economic consequences beyond fund flows. One is the impact of performance measurement on fund manager incentives. Brown, Harlow, and Starks [1996] show that annual performance monitoring gives investment managers incentive to manipulate risk levels midyear in response to competitive effects. Khorana [1996] shows that managers engage in windowdressing and herding to guard against dismissal after poor performance, leading to higher portfolio turnover. Such actions by managers can be costly for the investors who must bear the transaction costs and other distortions associated with these activities. Improvements in technology have made it easy to monitor performance frequently. It is standard practice for plan sponsors to receive performance information on a
Unexpected Results in the Chiral Limit with Staggered Fermions
, 2002
"... A cluster algorithm is constructed and applied to study the chiral limit of the strongly coupled lattice Schwinger model involving staggered fermions. The algorithm is based on a novel loop representation of the model. Finite size scaling of the chiral susceptibility based on data from lattices of s ..."
Abstract
 Add to MetaCart
of size up to 64×64 indicates the absence of long range correlations at strong couplings. Assuming that there is no phase transition at a weaker coupling, the results imply that all mesons acquire a mass at nonzero lattice spacings. Although this does not violate any known physics, it is surprising since
KodairaSpencer theory of gravity and exact results for quantum string amplitudes
 Commun. Math. Phys
, 1994
"... We develop techniques to compute higher loop string amplitudes for twisted N = 2 theories with ĉ = 3 (i.e. the critical case). An important ingredient is the discovery of an anomaly at every genus in decoupling of BRST trivial states, captured to all orders by a master anomaly equation. In a particu ..."
Abstract

Cited by 545 (60 self)
 Add to MetaCart
particular realization of the N = 2 theories, the resulting string field theory is equivalent to a topological theory in six dimensions, the Kodaira– Spencer theory, which may be viewed as the closed string analog of the Chern–Simon theory. Using the mirror map this leads to computation of the ‘number
Analysis of TCP Performance over Mobile Ad Hoc Networks Part I: Problem Discussion and Analysis of Results
, 1999
"... Mobile ad hoc networks have gained a lot of attention lately as a means of providing continuous network connectivity to mobile computing devices regardless of physical location. Recently, a large amount of research has focused on the routing protocols needed in such an environment. In this twopart ..."
Abstract

Cited by 511 (5 self)
 Add to MetaCart
improve TCP performance. In this paper (Part I of the report), we present the problem and an analysis of our simulation results. In Part II of this report, we present the simulation and results in detail.
Expected stock returns and volatility
 Journal of Financial Economics
, 1987
"... This paper examines the relation between stock returns and stock market volatility. We find evidence that the expected market risk premium (the expected return on a stock portfolio minus the Treasury bill yield) is positively related to the predictable volatility of stock returns. There is also evid ..."
Abstract

Cited by 674 (9 self)
 Add to MetaCart
evidence that unexpected stock market returns are negatively related to the unexpected change in the volatility of stock returns. This negative relation provides indirect evidence of a positive relation between expected risk premiums and volatility. 1.
Results 1  10
of
625,414