25,341 research outputs found
Bootstrap Hypothesis Testing
No full textThis paper surveys bootstrap and Monte Carlo methods for testing hypotheses in econometrics. Several different ways of computing bootstrap P values are discussed, including the double bootstrap and the fast double bootstrap. It is emphasized that there are many different procedures for generating bootstrap samples for regression models and other types of model. As an illustration, a simulation experiment examines the performance of several methods of bootstrapping the supF test for structural change with an unknown break point.bootstrap test, supF test, wild bootstrap, pairs bootstrap, moving block bootstrap, residual bootstrap, bootstrap P value
The impact of proprietary varieties on the u.s. hop market 2000-2020
No full textAnalizirane so bile spremembe dinamike hmeljnega trga med letoma 1948 in 2020, da bi se vzpostavili izhodiščni rezultati in trendi v zvezi z razmerji med metriko industrije ZDA, kot so proizvodnja, zaloge, izpiranje zalog in povprečna cena sezone. Na podlagi edinstvenih tržnih načel je bilo izbranih pet podpopulacij podatkov. Korelacija z metodo Pearson in verjetnost vzročnih odnosov z uporabo Bayesijevega izreka med metriki industrije so bili izračunani tako, da so dokazali svojo evolucijo skozi čas v različnih obdobjih. Primerjave med obdobji so količinsko razčlenile stopnjo, na katero je do leta 2020 vplival hmeljski trg v ZDA. Vsaka spremenljivka je bila analizirana kot odvisna in neodvisna spremenljivka na načine, ki so merili njihov vpliv na dogodke prihodnjih let. To je omogočilo razvoj modela napovedi cen hmelja v ZDA. Z uporabo Indeksa Herfindahl-Hirschman je bilo zmanjšanje konkurenčnosti v industriji hmelja v ZDA zaradi povečanega lastnega deleža sort med letoma 2000 in 2020 količinsko razvrščeno. Dokumentirani so bili hmeljni kartel z vplivom na hektar, proizvodnjo, dobavo in ceno 70 odstotkov hmelja v zda do leta 2020. Napovedi za leta 2020 do leta 2025 so pokazale lastniško sortno prevlado 90 odstotkov industrije ZDA do leta 2025 z 80 odstotki akrila ZDA pod vplivom enega podjetja. Ugotovljeni so bili dokazi za zakasnitev presežnega odziva (DSR), metodo, s katero se razvija disekvilibrij na trgu hmelja in so bili izpostavljeni podatki, ki dokazujejo njegove učinke med letoma 1948 in 2000. Njena odsotnost v obdobju hitre rasti lastnih sort je ponudila dokaze o obstoju in moči kartela. Hmeljsko ravnotežje (HER) je bila predstavljena metoda za določanje tržnega ravnotežja ZDA in njenih učinkov na količinsko napoved cen. Razpravljalo se je o vplivu cen na obstoj hmeljskega kartela, stroških izgub mrtve teže in morebitnih učinkih doganjanja med trgovci in pridelovalci.Changes in U.S. hop market dynamics between 1948 and 2020 were analyzed to establish baseline results and trends regarding the relationships between U.S. industry metrics such as production, stocks, stock depletion and season average price. Five data subpopulations were chosen based on unique market principles. The correlation using the Pearson method and the probability of causal relationships using the Bayesian theorem between industry metrics were calculated in such a way to demonstrate their evolution over time within the different periods. Comparisons between periods quantified the degree to which the U.S. hop market was influenced by the existence of intellectual property by 2020. Each variable was analyzed as both a dependent and independent variable in ways that measured their impact upon the events of future years. This enabled the development of a model for forecasting U.S. hop prices. Using the Herfindahl-Hirschman Index, the reduction of the competitiveness in the U.S. hop industry due to increased proprietary variety acreage between 2000 and 2020 was quantified. A hop cartel with influence over the acreage, production, supply and price of 70 percent of the U.S. hop industry by 2020 was documented. Forecasts for the years 2020 through 2025 demonstrated proprietary variety dominance of 90 percent of the U.S. industry by 2025 with 80 percent of U.S. acreage under the influence of one company. Evidence for the Delayed Surplus Response (DSR), a method by which disequilibrium in the hop market develops was identified and data demonstrating its effects between 1948 and 2000 were highlighted. Its absence during the period of rapid proprietary variety growth offered evidence regarding the existence and power of a cartel. The Hop Equilibrium Ratio (HER), a method for determining U.S. market equilibrium was presented and its effects upon price forecasting quantified. Price influence stemming from the existence of a hop cartel, the cost of deadweight losses and the potential effects of collusion between merchants and growers were discussed
Jack Alive / Martin Dead : The Location of the "Author" in Jack London\u27s Martin Eden
No full textThis essay is an attempt to read Martin Eden, Jack Londonʼs autobiographical novel, in terms of the inextricable relationship between the author and the protagonist. Critics have often taken the unbalanced plot and the lack of ironic distance between narrator and character in Martin Eden as the technical weakness of London, but this paper argues that the achievement of this novel owes a great deal to the attachment of London to Martin. The unbalanced structure is a necessary product of the severe struggle of the author to kill his romantic alter ego. // Martin, who aspires to win Ruth Morse, tries to cross class boundaries by making a career of a writer. Even after realizing the emptiness of Ruth, who turns out to be nothing but a typical figure of the bourgeoisie, he somehow persists in loving her. The notion underlying here is that, for Martin, love, career and art are fundamentally inseparable. He objects to the aestheteʼs view of Brissenden on account of his separation of art from career. Martinʼs identity and life consist only in the triunity of love/career/art; the alternative is the repudiation of life. Thus, the unnatural delay of his disappointment in love can be regarded as Londonʼs strategy to set the suicide of Martin as the necessary consequence of the story. // By finishing the story and killing Martin, London finally detaches himself from Martin, reconstructs his self, and, unlike Martin, survives as a professional writer. In this sense, Martin Eden is a story about “writerʼs self-reconstruction.
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Letter from Martin Chizzick
No full textCongratulations to Duane Pearsall for receiving the Enterpreneur of the Year award; note on the letter was written by Pearsall and it mentions that Martin, the author of the letter, died in a airplane accident
Robert Martin Tiffin's Mystery Man Newspaper Articles
No full textAdvertiser-Tribune newspaper clippings featuring a story about Robert Martin (written by Nancy Kleinhenz), a local author from Tiffin (Ohio) who wrote under the pseudonym of Lee Roberts, and two of his short stories. Martin wrote mystery novels in his spare time, creating more than 22 mystery novels. For more information about Robert Martin and a list of books go to http://www.mysteryfile.com/RMartin/JBennett.html
Experiences Using Large Scale Video Walls for Distance Education
No full textWe describe our experiences building and using the Rutgers Videowall, a low-cost telepresence system that has been used teaching 15 courses and colloquia. By relaxing typical spatial telepresence features, such as background continuity, we greatly reduced costs and gained flexibility in the rooms it could be deployed in. The lower costs and room flexibility enabled academic departments to use the wall, in contrast to traditional telepresence systems which remained inaccessible. We found that the Videowall’s spatial distortions did not have a significant impact on useability, as our initial survey results show that students had an overall positive experience.Technical report DCS-tr-72
Hans Martin Schwarz Collection 1934 - 1938
No full textThis collection contains clippings of articles by Hans Martin Schwarz (1917, Hamburg – 2006, New York, better known as Martin Ebon), published between 1934 and 1938 in German-Jewish newspapers on a wide variety of subjects such as sports, emigration, the political situation in Germany, and religious attitudes of the young. It also contains reviews of his books "Einer wie Du und Ich" and "Heiteres, Besinnliches, Nachdenkliches."digitizedHans Martin Schwarz (1917, Hamburg – 2006, New York, better known as Martin Ebon), was a journalist and author. In Germany during the 1930s, he published in a variety of German-Jewish periodicals, primarily the Israelitisches Familienblatt. After immigrating to the United States in 1938, he changed his name to Martin Ebon, and published dozens of books in the areas of world affairs and parapsychology.Processe
T1 Contrast Mechanisms at Ultra-High Magnetic Field
No full textABSTRACT Martin John MacKinnon: T1 Contrast Mechanisms at Ultra-High Magnetic Field (Under thedirection of Dr. Yen-Yu Ian Shih) This work investigates two different spin-lattice relaxation (T1) contrast mechanisms at ultrahighmagnetic field strength. Oxidative stress, a sustained imbalance between the production of reactive oxygen species andthe antioxidant capacity of the cell, is commonly proposed as a pathogenic factor in a plethora oflife-changing morbidities including neurodegenerative disease cancer, and neurodevelopmentaldisorders. Currently, no non-invasive tool is capable of spatially mapping regions of oxidativestress. Some MR-studies speculatively attribute measured signal changes to a a subset of ROS, freeradicals, due to their hypothesized T1-shortening effect. However, as proof-of-concept studies arelacking, interpretation of data is confounded. We began to address this ambiguity by measuring thespin-lattice-relaxivity of a free radical, superoxide, for the first time. We show that the spin-latticerelaxivity of the superoxide free radical is 0.3 mM−1s−1, which is of a similar order of magnitudeto molecular oxygen. This work acts as the first step in a line of future validation studies.Next, we developed a Zero-Echo-Time (ZTE) - fMRI technique, which is sensitive to T1-shortening hemodynamic effects. The gold-standard fMRI technique, gradient-echo echo planarimaging (GRE-EPI), suffers from five major drawbacks: (1) high acoustic noise (2) ghosting andmotion artifact; (3) sensitivity to magnetic field inhomogeneities; (4) low sensitivity comparedto other, non fMRI, neuroimaging modalities and (5) poor spatial specificity to the actual site ofneuronal activation. Although alternative fMRI techniques address some of these limitations, theyall sacrifice sensitivity compared to GRE-EPI. We demonstrate how a ZTE sequence, designed forfMRI applications, addresses the weaknesses of GRE-EPI without sacrificing functional sensitivity.Doctor of Philosoph
Interview with Father James Martin
No full textIn May 2011, the Ignatian Faculty Scholars at Regis University conducted a Skype interview with Father James Martin, S. J., author of The Jesuit Guide to Almost Everything. The Scholars had used Father Martin’s book as a text for their year of study, which focused on Ignatian Spirituality, the Ignatian Pedagogical Paradigm, and teaching and learning at a Jesuit university. The interview was transcribed and is printed below. Father Martin reflects on the book, and responds to questions about the book itself, about finding God in all learners, and about the Church
Uvariopsis dicaprio (Annonaceae) a new tree species with notes on its pollination biology, and the Critically Endangered narrowly endemic plant species of the Ebo Forest, Cameroon
No full textGosline, George, Cheek, Martin, Onana, Jean Michel, Ngansop Tchatchouang, Eric, van der Burgt, Xander M., MacKinnon, Lorna, Dagallier, Léo-Paul M. J. (2022): Uvariopsis dicaprio (Annonaceae) a new tree species with notes on its pollination biology, and the Critically Endangered narrowly endemic plant species of the Ebo Forest, Cameroon. PeerJ (e12614) 9: 1-21, DOI: 10.7717/peerj.12614, URL: http://dx.doi.org/10.7717/peerj.1261
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