2,828 research outputs found
Using Perl for Statistics: Data Processing and Statistical Computing
No full textIn this paper we show how Perl, an expressive and extensible high-level programming language, with network and ob ject-oriented programming support, can be used in processing data for statistics and statistical computing. The paper is organized in two parts. In Part I, we introduce the Perl programming language, with particular emphasis on the features that distinguish it from conventional languages. Then, using practical examples, we demonstrate how Perl's distinguishing features make it particularly well suited to perform labor intensive and sophisticated tasks ranging from the preparation of data to the writing of statistical reports. In Part II we show how Perl can be extended to perform statistical computations using modules and by "embedding" specialized statistical applications. We provide example on how Perl can be used to do simple statistical analyses, perform complex statistical computations involving matrix algebra and numerical optimization, and make statistical computations more easily reproducible. We also investigate the numerical and statistical reliability of various Perl statistical modules. Important computing issues such as ease of use, speed of calculation, and efficient memory usage, are also considered.
Introduction to The Canvas and Other Stories by Salamea Perl
No full textThe Canvas and Other Stories by Salomea Perl is a bilingual Yiddish-English text featuring the only known stories Perl wrote and published in the various Yiddish newspapers of her time. Uncovered after two years of research and translated by Ruth Murphy, the book presents the original Yiddish text and English translation in a side-by-side format. Murphy\u27s translations present Perl\u27s voice to English readers, while Perl\u27s rich, authentic Yiddish brings readers back to the Jewish, Yiddish-speaking streets of turn-of-the-century Poland. The insightful introduction by Dr. Justin Cammy gives the historical background of both the text and its author. The work of Salomea Perl, an author completely unknown until these translations, is an important addition to ongoing discovery of female Yiddish writers.
Salomea Perl (1869-1916) was born in the town of Lomża (now Poland) and raised in the larger city of Lublin. After completing studies at the University of Geneva, she settled in Warsaw. Her Yiddish first stories were published n Yontev Bletlekh, the self-proclaimed radical magazine published by Y. L. Peretz, starting in 1895. Her seventh and final known Yiddish work was published in 1910.
The publication here of all seven known stories by Salomea Perl is not only important because it marks the rediscovery of a forgotten Yiddish writer. It also allows us to consider her unsentimental portraits of a Jewish world in transition. Her stories reveal deep class divisions and the prevalence of Jewish poverty. She investigates how the religious values that guided everyday life often lacked compassion for lived experience. Perl explores the social and cultural ruptures caused by internal migration from small towns to big cities, and new manifestations of secular Jewish identity associated with modern life.
At the same time, for every frayed relationship between a husband and wife or a daughter shunning her father, Perl\u27s fiction also reveals unassuming acts of self-sacrifice and modesty. For every abandonment of religious obligation in favor of the seductions of the secular-modern world there remain those who are content to carry on lives of relative simplicity.
From the Introduction by Justin Cammy, Associate Professor of Jewish Studies and Comparative Literature at Smith College in Northampton, Massachusetts
Source: Publisherhttps://scholarworks.smith.edu/jud_books/1005/thumbnail.jp
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The tau decay mode problem
No full textThe problem of understanding the branching fractions of the 1-charged particle decay modes of the /tau/ lepton is reviewed. The emphasis is on a recent study by K.G. Hayes and M.L. Perl of the statistical validity of the branching fraction measurements. Unconventional explanations of the problem, none of them satisfactory, are also discussed. 25 refs., 4 tabs
LLParser 2: UN ESECUTORE DI GRAMMATICHE AD ATTRIBUTI TOP-DOWN
No full textLLParser è un sistema per la valutazione Top-Down di grammatiche attributate LL(1) ed è il risultato della tesi in Scienze dell’Informazione del Dott. Samuele Manfrin, laureatosi a Pisa nell’Ottobre del 2001, seguito dal relatore Prof. M. Bellia.
Obiettivo del presente lavoro di tesi è stato la realizzazione di una nuova versione di LLParser, denominata LLParser 2. L’introduzione di nuove funzionalità e la eliminazione di vincoli rendono LLParser 2 uno strumento ancor più potente per l’analisi, la traduzione e la generazione di codice.
Le motivazioni che spinsero alla ideazione di LLParser e successivamente al passaggio a LLParser 2 sono di due tipi. Originariamente si pensò ad uno strumento didattico da poter offrire agli studenti del corso di Compilatori, ma già durante la realizzazione di LLParser scaturì la possibilità di ottenere un ambiente di lavoro adeguato anche alle più esigenti attività di progetto per la sperimentazione di linguaggi.
LLParser 2 si colloca in quella categoria di strumenti che affrontano esclusivamente problematiche di tipo Top-Down, consentendo la definizione, l’analisi e l’uso di Grammatiche LL(1), di Grammatiche L-Attributate e di Schemi di Traduzione Discendente
Automated SNP genotype clustering algorithm to improve data completeness in high-throughput SNP genotyping datasets from custom arrays
No full textHigh-throughput SNP genotyping platforms use automated genotype calling algorithms to assign genotypes. While these algorithms work efficiently for individual platforms, they are not compatible with other platforms, and have individual biases that result in missed genotype calls. Here we present data on the use of a second complementary SNP genotype clustering algorithm. The algorithm was originally designed for individual fluorescent SNP genotyping assays, and has been optimized to permit the clustering of large datasets generated from custom-designed Affymetrix SNP panels. In an analysis of data from a 3K array genotyped on 1,560 samples, the additional analysis increased the overall number of genotypes by over 45,000, significantly improving the completeness of the experimental data. This analysis suggests that the use of multiple genotype calling algorithms may be advisable in high-throughput SNP genotyping experiments. The software is written in Perl and is available from the corresponding author
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Search for close-mass lepton pairs (L/sup -/,L/sup 0/)
No full textPreliminary results are reported of a search in 207 pb/sup -1/ of MARK II PEP data at ..sqrt..s = 29 GeV for lepton pairs (L/sup -/,L/sup 0/) where the L/sup 0/ mass can be close to, but not exceed, the L/sup -/ mass. The numbers of e - ..mu.., and 3 or more charged hadrons versus isolated e or ..mu.., events are compared to Monte Carlo predictions for e/sup +/e/sup -/ ..-->.. tau/sup +/tau/sup -/, e/sup +/e/sup -/ ..-->.. q anti q, and two-virtual-photon processes. Possible residual signals for (L/sup -/,L/sup 0/) pairs are compared to Monte Carlo simulations and 2sigma confidence level limits on the L/sup -/ and L/sup 0/ masses are presented
Heat transfer by conductive warming with circulating-water mattresses
No full textAim of the study: To determine the heat transfer by circulating-water mattresses placed under the back and over both legs of human volunteers. Methods: With approval by the local ethics committee and informed consent eight minimally clothed volunteers were included in the study. Six calibrated heat flux transducers were placed on the back and additionally eight sensors were placed on both legs of each volunteer. The volunteers reclined on a circulating-water mattress (ComfortPad Plus(R), Cincinnati Sub-Zero Products Inc., Cincinnati, OH, USA) coated with gel (Granulab International, Armersfoort, Niederlande). Another circulating-water mattress (Plastipad(TM), Cincinnati Sub-Zero Products Inc.) was placed over both legs. Both devices were heated to 41 degreesC by a hypo-hyperthermia system (Hico-Variotherm 530, Hirtz & Co. Hospitalwerk, Cologne, Germany). Heat flux data were sampled during steady-state conditions. After determination of the contact area between the mattresses and the skin, heat transfer was calculated by multiplication of the heat flux per area by the contact area. Results: Heat flux per area to the back was 45.6 +/- 4.5 W m(-2), the contact area was 0.39 +/- 0.03 m(2). This resulted in a heat transfer of 18.0 +/- 2.4 W. Heat flux per area to the legs was 24.7 +/- 4.3 W m(-2), the contact area was 0.12 +/- 0.01 m(2). This resulted in a heat transfer of 2.9 +/- 0.6 W. Conclusion: The heat transfer of the circulating-water mattress to the back was much higher than the heat transfer to the legs. Nevertheless, model calculations show that conductive warming of the legs is more important for the prevention of perioperative hypothermia than conductive warming of the back, because it has a higher impact on the heat balance
Online Homework for Agricultural Economics Instruction: Frankenstein’s Monster or Robo TA?
No full textThis paper describes the programming required for online homework, evaluates its use, and presents methods for student identification and for processing student input. Online homework applications were evaluated in a real class setting. Generally, online homework is cost effective for large classes that have numerous assignments and repeated usage. Online homework appears to increase learning through increased student study-time allocations. Students felt that online homework made course website interaction more productive. They also indicated that online homework increased their perception of the value of lectures and that its use in other courses would be welcome. All findings were highly statistically significant.computer-aided instruction, economics teaching methods, instruction cost effectiveness, online homework, Teaching/Communication/Extension/Profession, A220, G130, Q100,
The Balanced Sorting Network
No full textThis paper introduces a new sorting network, called the balanced sorting Network, that sorts n items in 0 (f Ig 11]2) time using (021)(Ig n)~ comparators. Although these bounds are comparable to many existing sorting networks, the balanced sorting network possesses some distinct advantages. In particular, its structure is highly regular consisting of a sequence of identical balanced merging networks. We prove that Ig n identical merging networks are both necessary and sufficient to sort n items. We also present an explicit implementation of our network on the shuffle exchange interconnection model in which the directions of the comparitors are all identical and fixed.Technical report DCS-TR-12
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