266 research outputs found
On the Existence of the Maximum Likelihood Estimates for Poisson Regression
No full textWe note that the existence of the maximum likelihood estimates for Poisson regression depends on the data configuration. Because standard software does not check for this problem, the practitioner may be surprised to find that in some applications estimation of the Poisson regression is unusually difficult or even impossible. More seriously, the estimation algorithm may lead to spurious maximum likelihood estimates. We identify the signs of the non-existence of the maximum likelihood estimates and propose a simple empirical strategy to single out the regressors causing this type of identification failure.Poisson estimation, gravity equation
Tephrostratigraphy and hominin paleoenvironments of the Hadar Formation, Afar Depression, Ethiopia
No full textThe deposits of the Hadar Formation preserve a continuous record of hominin habitats and environmental change from ca. 3.45 Ma until a regional disconformity at ca. 2.9 Ma. At Hadar, strata below the disconformity are composed of fluvial sands and well-developed claystone paleosols associated with a large-scale meandering river system and several brief lacustrine intervals associated with westward transgressions of the lacustrine depocenter to the east. Detailed analysis of these deposits indicates a strong cyclicity in the fluvial system with regular intercalations of fully lacustrine, lake margin, or ephemeral floodplain lake facies. Following the disconformity, sediment preservation at Hadar is highly localized and represents a major change in depositional facies and character with strata composed primarily of cut-and-fill channel conglomerates and silt-dominated paleosols. A comprehensive tephrostratigraphic analysis of the Hadar Formation volcanics has identified at least 12 distinct vitric tephra preserved above the disconformity at Hadar until ca. 0.78 Ma. Surprisingly few of these tephra correlate to the early archaeology sites in the adjacent Gona region, which reflect the complex paleogeography of these deposits. New radiometric and paleomagnetic age estimates are in general agreement with previously published results, while previously undated tuffs help refine the chronological framework of the formation.
Analysis of the Hadar faunal assemblages indicates that a range of habitats were available to Australopithecus afarensis through time and space including open and closed woodlands, gallery forests, edaphic grasslands, and shrublands. Some of the variation observed in these faunal communities can be explained by the spatial distribution of fauna across the landscape, as well as by the depositional environments with which they are associated. Although there is no clear directional trend observed in habitats through time, the faunal assemblages indicate slightly more xeric conditions beginning around 3.2 Ma with a distinct faunal turnover at 3.0 Ma. This shift may be related to changes in global climate patterns, particularly seasonality. Tests of association between A. afarensis and other taxa, as well as the spatial distribution of A. afarensis across the paleolandscape provide little evidence to suggest a habitat preference for the early hominin despite persisting throughout a half million years of environmental and climatic shifts recorded at Hadar.Ph.D.Includes bibliographical references (p. 566-600)
Trading Partners and Trading Volumes: Implementing the Helpman-Melitz-Rubinstein Model Empirically
No full textHelpman, Melitz, and Rubinstein (2008)-HMR-present a rich theoretical model to study the determinants of bilateral trade flows across countries. The model is then empirically implemented through a two-stage estimation procedure. This note seeks to clarify some econometric aspects of the estimation approach used by HMR and explore the consequences of possible departures from the maintained distributional assumptions.Gravity equation, Heteroskedasticity, Jensens inequality
Dagital Dakwah Habib Husein Ja’far Al-Hadar dalam Konten Youtube Login (Analisis Teori Media Baru)
No full textThis study purpuse to analyze how Habib Husein Ja'far al Hadar uses digital technology as a medium for da'wah using new media communication theory. Today's increasingly advanced technological developments certainly add to the challenge for a preacher to think about how Islamic teachings can be accessed by many people. So the author is interested in researching the digitization of Habib Husein Ja'far al Hadar's preaching, an Indonesian citizen of Arab descent, increasingly famous through Deddy Corbuzier's YouTube channel in Login content as a medium used to spread the teachings of the Islamic religion. Inviting friends to discuss from various circles and backgrounds, different ethnicities and religions. The author found several important points that were conveyed by Habib Husein Ja'far al Hadar. First, Islam is a religion full of love and joy that is far from radical. Second, Islam teaches tolerance between religions. Third, convey the truth with good morals. These three things make Habib Husein Ja'far al Hadar loved by all levels of society. Means the use of the number bag media on mathematical learning has a moderate influence on the learning outcomes of pupils of class IV SDN 36 Pontianak Kota
Parallel Repetition From Fortification
No full textThe Parallel Repetition Theorem upper-bounds the value of a repeated (tensored) two prover game in terms of the value of the base game and the number of repetitions. In this work we give a simple transformation on games – “fortification” – and show that for fortified games, the value of the repeated game decreases perfectly exponentially with the number of repetitions, up to an arbitrarily small additive error. Our proof is combinatorial and short. As corollaries, we obtain: (1) Starting from a PCP Theorem with soundness error bounded away from 1, we get a PCP with arbitrarily small constant soundness error. In particular, starting with the combinatorial PCP of Dinur, we get a combinatorial PCP with low error. The latter can be used for hardness of approximation as in the work of Hastad. (2) Starting from the work of the author and Raz, we get a projection PCP theorem with the smallest soundness error known today. The theorem yields nearly a quadratic improvement in the size compared to previous work. We then discuss the problem of derandomizing parallel repetition, and the limitations of the fortification idea in this setting. We point out a connection between the problem of derandomizing parallel repetition and the problem of composition. This connection could shed light on the so-called Projection Games Conjecture, which asks for projection PCP with minimal error.National Science Foundation (U.S.) (Grant 1218547
Management of prepregnancy, pregnancy and postpartum obesity from the FIGO Pregnancy and Non-Communicable Diseases committee: A FIGO (International Federation of Gynecology and Obstetrics) guideline
No full textEstablishing consensus criteria for the diagnosis of diabetes in pregnancy following the HAPO study
No full text
Dialog Antar Agama di Era Digital: Analisis Podcast "Berbeda Tapi Bersama" Habib Husein Ja'far Al-Hadar
No full textThis article aims to analyse the study of religious tolerance presented on Habib Husein Ja’far al-Hadar’s podcast channel. In the digital era, preachers are challenged to package the content they deliver in engaging ways while addressing various circulating issues. The podcast hosted by Habib Husein Ja’far al-Hadar discusses light yet substantive explanations regarding the religious practices of Indonesian society. Religion and indigenous beliefs in Indonesia are explored through conversational, dialogic, and humorous discussions between two speakers. This study uses a qualitative research method with content analysis as its primary analytical approach. To strengthen the research, the author also employs library research by reviewing various relevant literature. The primary data source of this research is Habib Ja’far al-Hadar’s podcast channel, supported by books and scholarly articles related to the theme of religious tolerance. The findings indicate that several episodes of the Noice podcast “Berbeda Tapi Bersama” reveal crucial points for the future of tolerance in Indonesia. The author identifies several indications, including that each religion offers exemplary teachings and encourages respect for the principles and rules of other religions. Each religion has points of convergence and similarities, even if its intentions and values differ. These elements demonstrate strong respect and tolerance, with dialogue serving as a key foundation for sustaining diversity
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