scholarly journals Recent Developments in Mixed Poisson Distributions

2021 ◽  
Vol 14 ◽  
pp. 1-10
Author(s):  
Seng Huat Ong ◽  
Yeh Ching Low ◽  
Kian Kok Toh
Keyword(s):  
Recent Work ◽  
Random Variable ◽  
Data Modelling ◽  
Poisson Distributions ◽  
Recent Developments

Mixed Poisson distributions are a class of distributions arising from the Poisson mean fluctuating as a random variable. Mixed Poisson distributions have been applied in diverse disciplines for modelling non-homogeneity in populations. This paper brings together recent work on this class of distributions with focus on specific models, computation and simulation, applications to stochastic and data modelling.

Recent Developments in the Evolution of Morphologies and Controllers for Physically Simulated Creatures

2001 ◽  
Vol 7 (1) ◽  
pp. 77-87 ◽  
Author(s):  
Tim Taylor ◽  
Colm Massey
Keyword(s):  
Recent Work ◽  
Original Work ◽  
Three Dimensional ◽  
Parallel Computer ◽  
Connection Machine ◽  
Recent Developments ◽  
Body Shapes

Karl Sims' work [25, 26] on evolving body shapes and controllers for three-dimensional, physically simulated creatures generated wide interest on its publication in 1994. The purpose of this article is threefold: (a) to highlight a spate of recent work by a number of researchers in replicating, and in some cases extending, Sims' results using standard PCs (Sims' original work was done on a Connection Machine CM-5 parallel computer). In particular, a re-implementation of Sims' work by the authors will be described and discussed; (b) to illustrate how off-the-shelf physics engines can be used in this sort of work, and also to highlight some deficiencies of these engines and pitfalls when using them; and (c) to indicate how these recent studies stand in respect to Sims' original work.

Cryptorchidism

1984 ◽  
Vol 5 (10) ◽  
pp. 317-319
Author(s):  
Terry D. Allen
Keyword(s):  
Endocrine Therapy ◽  
Recent Work ◽  
The Other ◽  
Testicular Function ◽  
Mechanical Problem ◽  
Hormonal Stimulation ◽  
Bilateral Disease ◽  
Recent Developments ◽  
Unilateral Cryptorchidism

Recent developments, particularly in the field of endocrinology, have substantially altered many conventional concepts about descended testis. The disease can no longer be viewed solely as a mechanical problem in descent, and there is an increasingly greater emphasis being placed upon the early resolution of the disorder in an effort to maximize ultimate testicular function. In this brief review, some of the controversies and current philosophies regarding this subject are explored. THE ENDOCRINOLOGIC QUESTION Although etiologic considerations in cryptorchidism have always included the possibility of inadequate hormonal stimulation, this concept has generally been overshadowed by one that emphasizes mechanical impediment to descent. This viewpoint seemed justified by the fact that endocrine therapy had never yielded more than modest results and by the feeling that it was difficult to account for unilateral cryptorchidism on the basis of a generalized endocrinopathy. After all, "if inadequate hormonal stimulation were the cause of maldescent of one testis, why did the other one descend?" The recent work of Job and associates in Paris, however, has shattered many of these arguments with the revelation that endocrine abnormalities can indeed be identified in patients with cryptorchidism and that furthermore these abnormalities canbe identified in patients with unilateral cryptorchidism as well as in those with bilateral disease.

Computational Pragmatics

2016 ◽  
Author(s):  
Harry Bunt
Keyword(s):  
Recent Work ◽  
Language Use ◽  
Computational Tools ◽  
Use Of Resources ◽  
Corpus Construction ◽  
Dialogue Acts ◽  
Recent Developments ◽  
Dialogue Modeling ◽  
Context Of Use ◽  
Utterance Interpretation

This chapter presents a characterisation of the field of computational pragmatics, discusses some of the fundamental issues in the field, and provides a survey of recent developments. Central to computational pragmatics is the development and use of computational tools and models for studying the relations between utterances and their context of use. Essential for understanding these relations are the use of inference and the description of language use as actions inspired by the context, and intended to influence the context. The chapter therefore focuses on recent work in the use of inference for utterance interpretation and in dialogue modeling in terms of dialogue acts, viewed as context-changing actions. The chapter concludes with a survey of recent activities concerning the construction and use of resources in computational pragmatics, in particular annotation schemes, annotated corpora, and tools for corpus construction and use.

Non-planar Boron Lewis Acids Taking the Next Step: Development of Tunable Lewis Acids, Lewis Superacids and Bifunctional Catalysts

Synlett ◽  
2020 ◽  
Vol 31 (17) ◽  
pp. 1639-1648
Author(s):  
Guillaume Berionni ◽  
Aurélien Chardon ◽  
Arnaud Osi ◽  
Damien Mahaut ◽  
Ali Ben Saida
Keyword(s):  
Recent Work ◽  
Research Group ◽  
Lewis Acids ◽  
Experimental Studies ◽  
Planar Geometry ◽  
Bifunctional Catalysts ◽  
Group 13 ◽  
Recent Developments ◽  
Stereoelectronic Properties ◽  
Planar Group

Although boron Lewis acids commonly adopt a trigonal planar geometry, a number of compounds in which the trivalent boron atom is located in a pyramidal environment have been described. This review will highlight the recent developments of the chemistry and applications of non-planar boron Lewis acids, including a series of non-planar triarylboranes derived from the triptycene core. A thorough analysis of the properties and of the influence of the pyramidalization of boron Lewis acids on their stereoelectronic properties and reactivities is presented based on recent theoretical and experimental studies.1 Non-planar Trialkylboranes2 Non-planar Alkyl and Aryl-Boronates3 Non-planar Triarylboranes and Alkenylboranes3.1 Previous Investigations on Bora Barrelenes and Triptycenes3.2 Recent Work on Boratriptycenes from Our Research Group4 Applications of Non-planar Boranes4.1 Non-planar Alkyl Boranes and Boronates4.2 Non-planar Triarylboranes (Boratriptycenes)5 Other Non-planar Group 13 Lewis Acids6 Further Work and Perspectives

Recent developments in Cyrene's chora south of the Wadi bel Gadir

2007 ◽  
Vol 38 ◽  
pp. 39-52 ◽  
Author(s):  
Susan Kane ◽  
Donald White
Keyword(s):  
Urban Development ◽  
Recent Work ◽  
University Of Pennsylvania ◽  
The West ◽  
Topographic Survey ◽  
Recent Developments ◽  
Archaeological Project ◽  
The City

AbstractRecent work in the Wadi bel Gadir in the southern chora region of Cyrene, in particular the discovery of two temple precincts by the Italian Mission (Missione Archeologica a Cirene della Università degli Studi di Urbino) as well as an intensive topographic survey by the newly reconstituted University of Pennsylvania Expedition (now the Cyrenaica Archaeological Project) is providing important information about urban development to the west and southwest of the city of Cyrene. This paper offers an overview of the previous work in the area and some thoughts on the potential implications of the recent discoveries by the Italian Mission led by Professor Mario Luni and the Cyrenaican Archaeological Project (CAP) directed by Professor Susan Kane.

Revisiting Spivak’s “Can the Subaltern Speak” through the lens of affect theory

2018 ◽  
Vol 18 (2) ◽  
pp. 115-127 ◽  
Author(s):  
Michalinos Zembylas
Keyword(s):  
Qualitative Research ◽  
Recent Work ◽  
Design Methodology ◽  
Affect Theory ◽  
The Other ◽  
Content Type ◽  
Recent Developments ◽  
Liberal Culture ◽  
Lauren Berlant ◽  
Theoretical Developments

PurposeThe purpose of this paper is to revisit Spivak’s seminal essay “Can the Subaltern Speak” and the perennial challenges of researchers to collect information about the Other, focusing on the recent developments in affect theory.Design/methodology/approachThe paper brings into the conversation the recent work on affect and sentimentality by Lauren Berlant with Spivak’s claims in the essay concerning the representation of the subaltern by scholars and researchers. The paper draws on Berlant’s work to trouble the liberal culture of “true feeling” as well as the liberal subject implied in Spivak’s essay as a subject who is “actively speaking.”FindingsRecent theoretical developments on the affect theory make an important intervention to the perennial methodological tensions about representation, ontology and epistemology – as raised by Spivak and others over the years – and inspire new ways of thinking with the tools of doing qualitative research.Originality/valueBringing into the conversation, the affect theory and Spivak’s iconic essay have important methodological implications for qualitative research.

scholarly journals Mixed Compound Poisson Distributions

1986 ◽  
Vol 16 (S1) ◽  
pp. S59-S79 ◽  
Author(s):  
Gord Willmot
Keyword(s):  
Negative Binomial ◽  
Random Variable ◽  
Computational Formula ◽  
Inverse Gaussian ◽  
Poisson Distributions ◽  
Mixing Distributions ◽  
Chi Squared ◽  
General Distributions ◽  
Generalized Inverse Gaussian ◽  
Thick Tails

AbstractThe distribution of total claims payable by an insurer is considered when the frequency of claims is a mixed Poisson random variable. It is shown how in many cases the total claims density can be evaluated numerically using simple recursive formulae (discrete or continuous).Mixed Poisson distributions often have desirable properties for modelling claim frequencies. For example, they often have thick tails which make them useful for long-tailed data. Also, they may be interpreted as having arisen from a stochastic process. Mixing distributions considered include the inverse Gaussian, beta, uniform, non-central chi-squared, and the generalized inverse Gaussian as well as other more general distributions.It is also shown how these results may be used to derive computational formulae for the total claims density when the frequency distribution is either from the Neyman class of contagious distributions, or a class of negative binomial mixtures. Also, a computational formula is derived for the probability distribution of the number in the system for the M/G/1 queue with bulk arrivals.

scholarly journals Sleeping with the enemy: Audience studies and critical literacy

2013 ◽  
Vol 16 (5) ◽  
pp. 457-473 ◽  
Author(s):  
Joke Hermes ◽  
Annika van den Berg ◽  
Marloes Mol
Keyword(s):  
Cultural Studies ◽  
Recent Work ◽  
Critical Literacy ◽  
Affect Theory ◽  
Cultural Citizenship ◽  
Cultural Literacy ◽  
Audience Studies ◽  
Meaning Production ◽  
Recent Developments ◽  
Relations Of Power

Audience studies is not the vibrant field it was in its 1980s and early 1990s heyday. Cultural studies today has a more balanced interest in production, audiences and texts. A renewed focus in audience studies on everyday meaning production, identity and relations of power could benefit from recent developments. Theorization of power especially has benefited from recent work on governmentality. In accord with recent work on ‘affect’, there is an opportunity for renewed vitality and urgency. Was audience studies damaged beyond repair by the charge that it is a populist field that celebrates rather than interrogates everyday media culture? Could a concept such as cultural literacy provide a bridge to help re-establish the critical credibility of audience studies or would it burden this field with its implied notions of standards, distinction and cultural exclusion? The article discusses recent work with youth audiences to inquire into the possibilities of ‘critical literacy’. It proposes taking up questions and insights raised by affect theory, to merge appreciation, criticism and understanding of the forces that drive (the possibility of) change, and to embed critical literacy in cultural studies’ ongoing interest in the construction of (cultural) citizenship.

N-Heterocyclic Carbene-Organocatalyzed Arene Formation: Application in Atroposelective Synthesis of Polysubstituted Benzenes

Synlett ◽  
2020 ◽  
Vol 31 (10) ◽  
pp. 925-932 ◽  
Author(s):  
Tingshun Zhu ◽  
Ke Xu ◽  
Ziyuan Wang
Keyword(s):  
Organic Chemistry ◽  
Recent Work ◽  
Organic Synthesis ◽  
Heterocyclic Carbenes ◽  
Powerful Method ◽  
Recent Developments ◽  
History Of ◽  
Cyclic Compounds ◽  
Near Future

In recent decades, organocatalysis by N-heterocyclic carbenes (NHCs) has emerged as a versatile and powerful method in organic synthesis. As a result of the power of NHC organocatalysis to produce cyclic compounds, polysubstituted benzenes, which are among the most important cyclic compounds in organic chemistry, can be synthesized efficiently and selectively. This article briefly summarizes the history of NHC organocatalysis, including recent developments in benzene-formation methods, and highlights our recent work in atroposelective arene formation by carbene-catalyzed formal [4+2] cyclo­additions. We expect that more NHC-catalyzed methods for the synthesis of asymmetric arenes will be developed in the near future, providing shortcuts to syntheses of sophisticated chiral functional molecules with polysubstituted benzene nuclei.

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