Efficient High-precision Boilerplate Detection Using Multilayer Perceptrons (Extended abstract of unpublished paper)

Abstract Removal of boilerplate is among the essential tasks in web corpus construction and web indexing. In this paper, we present an improved machine learning approach to general-purpose boilerplate detection for languages based on (extended) Latin alphabets (easily adaptable to other scripts). We keep it highly efficient (around 320 documents per single CPU core second) by using an optimized Multilayer Perceptron implementation while achieving around 95% correct classifications (Precision, Recall, and F 1 score over 0.95) by extracting suitable text block-internal features. We finally compare the performance of the Multilayer Perceptron to that of other classifiers such as Support Vector Machines

Nuclear Shadowing at Small x and Q^2

Shadowing corrections to structure functions of heavy nuclei are calculated at very low values of Bjorken-$x$ and at values of the momentum transfer relevant to recent experiments. Good agreement is obtained with data from the E665 Collaboration for Xe/D and Pb/D, and with the NMC data on Ca/D and C/D structure function ratios. Corrections to the deuteron structure function are also estimated down to $x \sim 10^{-5}$, and found to be less than about $3\%$ over the range of $x$ covered by the E665 data.Comment: ADP-93-214/T132 (August 1993), accepted for publ. in Phys.Lett.B. typeset using REVTeX, 12 pages, 4 uuencoded figure

Singular terms of helicity amplitudes at one-loop in QCD and the soft limit of the cross sections of multi-parton processes

We describe a general method that enables us to obtain all the singular terms of helicity amplitudes of n-parton processes at one loop. The algorithm uses helicity amplitudes at tree level and simple color algebra. We illustrate the method by calculating the singular part of the one loop helicity amplitudes of all $2\to 3$ parton subprocesses. The results are used to derive the soft gluon limit of the cross sections of all $2\to 4$ parton scattering subprocesses which provide a useful initial condition for the angular ordering approximation to coherent multiple soft gluon emission, incorporated in existing Monte Carlo simulation programs.Comment: Latex,13 pages, ETH-TH/94-

THE IMPORTANCE OF INTONATION IN THE ACTUAL DIVISION OF THE SENTENCE IN ENGLISH AND UZBEK

The article provides a comparative analysis of the peculiarities of intonation in English and Uzbek, which is the dominant means of the actual division of the sentence. The views of the linguists, who have researched the issue, are given. The importance of certain prosodic means of intonation in the languages compared is also illustrated by relevant examples from the literature. In particular, both logical and emphatic stress have the peculiarity of usage in both languages, and it has been proven that they load semantic or expressive prominence on a particular sentence unit, forming the intonation center of the sentence, a rheme group. In addition to the above units, there are a number of prosodic devices that appear in both languages in different ways as there are different links in terms of quantitative indications of them; each of these links is unique in forming predicative units, and they are regarded as the intonation constructions of the sentence. It is also emphasized that each of these intonation constructions and their variants are intertwined with the communicative aspect of the sentence, which is one of the most important tasks of the Uzbek and English communicative and corpus linguistics, which is developing currently. In general, it is revealed that intonation, as an external form of speech, is the determining factor signifying the speaker`s / narrator\u27s communicative purpose in discourse

Stability Assessment and Tuning of an Adaptively Augmented Classical Controller for Launch Vehicle Flight Control

Recently, a robust and practical adaptive control scheme for launch vehicles [ [1] has been introduced. It augments a classical controller with a real-time loop-gain adaptation, and it is therefore called Adaptive Augmentation Control (AAC). The loop-gain will be increased from the nominal design when the tracking error between the (filtered) output and the (filtered) command trajectory is large; whereas it will be decreased when excitation of flex or sloshing modes are detected. There is a need to determine the range and rate of the loop-gain adaptation in order to retain (exponential) stability, which is critical in vehicle operation, and to develop some theoretically based heuristic tuning methods for the adaptive law gain parameters. The classical launch vehicle flight controller design technics are based on gain-scheduling, whereby the launch vehicle dynamics model is linearized at selected operating points along the nominal tracking command trajectory, and Linear Time-Invariant (LTI) controller design techniques are employed to ensure asymptotic stability of the tracking error dynamics, typically by meeting some prescribed Gain Margin (GM) and Phase Margin (PM) specifications. The controller gains at the design points are then scheduled, tuned and sometimes interpolated to achieve good performance and stability robustness under external disturbances (e.g. winds) and structural perturbations (e.g. vehicle modeling errors). While the GM does give a bound for loop-gain variation without losing stability, it is for constant dispersions of the loop-gain because the GM is based on frequency-domain analysis, which is applicable only for LTI systems. The real-time adaptive loop-gain variation of the AAC effectively renders the closed-loop system a time-varying system, for which it is well-known that the LTI system stability criterion is neither necessary nor sufficient when applying to a Linear Time-Varying (LTV) system in a frozen-time fashion. Therefore, a generalized stability metric for time-varying loop=gain perturbations is needed for the AAC

The Double Scattering Contribution to b1(x,Q2)b_1(x,Q^2) in the Deuteron

We study the tensor structure function b_1\xq in deep inelastic scattering (DIS) of an electron from a polarized deuteron target. We model the electron-nucleon cross section at the starting point for $Q^2$ evolution by vector-meson-dominance (VMD). Shadowing due to the double-scattering of vector mesons, along with the presence of a d-state admixture in ground state deuteron wave function gives rise to a non-vanishing contribution to b_1\xq. Although significant at large Bjorken $x$, the restoration of rotational symmetry for small $x$ ($\leq10^{-3}$) requires that b_1^{(2)}\xq approach zero as $x\to 0$ in this model. If the model is valid, it should apply within the range of present fixed target experiments.Comment: 15 pages, 5 figures, BoxedEPS, REVTeX; correspondence to [email protected] ; discussion of impact parameter dependence of shadowing has been corrected, confirming a more significant enhancement of $b_1$ at small-x, figures have been change

Towards Merging PlatΩ and PGIP

AbstractThe PGIP protocol is a standard, abstract interface protocol to connect theorem provers with user interfaces. Interaction in PGIP is based on ASCII-text input and a single focus point-of-control, which indicates a linear position in the input that has been checked thus far. This fits many interactive theorem provers whose interaction model stems from command-line interpreters. PlatΩ, on the other hand, is a system with a new protocol tailored to transparently integrate theorem provers into text editors like that support semi-structured XML input files and multiple foci of attention. In this paper we extend the PGIP protocol and middleware broker to support the functionalities provided by PlatΩ and beyond. More specifically, we extend PGIP (i) to support multiple foci in provers; (ii) to display semi-structured documents; (iii) to combine prover updates with user edits; (iv) to support context-sensitive service menus, and (v) to allow multiple displays. As well as supporting , the extended PGIP protocol in principle can support other editors such as OpenOffice, Word 2007 and graph viewers; we hope it will also provide guidance for extending provers to handle multiple foci

Dressed for Sex: Red as a Female Sexual Signal in Humans

Background: In many non-human primate species, a display of red by a female serves as a sexual signal to attract male conspecifics. Red is associated with sex and romance in humans, and women convey their sexual interest to men through a variety of verbal, postural, and behavioral means. In the present research, we investigate whether female red ornamentation in non-human primates has a human analog, whereby women use a behavioral display of red to signal their sexual interest to men. Methodology/Principal Findings: Three studies tested the hypothesis that women use red clothing to communicate sexual interest to men in profile pictures on dating websites. In Study 1, women who imagined being interested in casual sex were more likely to display red (but not other colors) on their anticipated web profile picture. In Study 2, women who indicated interest in casual sex were more likely to prominently display red (but not other colors) on their actual web profile picture. In Study 3, women on a website dedicated to facilitating casual sexual relationships were more likely to prominently exhibit red (but not other colors) than women on a website dedicated to facilitating marital relationships. Conclusions/Significance: These results establish a provocative parallel between women and non-human female primates in red signal coloration in the mating game. This research shows, for the first time, a functional use of color in women’s sexual self-presentation, and highlights the need to extend research on color beyond physics, physiology, and preference to psychological functioning