Search results for "cmc"

"U wot m8te?" : word formations and use of emoticons in a synchronous chatroom

2017

Maailma muuttuu, ja niin muuttuu kielikin. Matkapuhelinten ja varsinkin internetin myötä kirjoitettu kieli on jo kohta noin pari vuosikymmentä ollut muutosvaiheessa – jotkut saattavat jopa miettiä, onko kirjoittaminen enää lainkaan tarpeellista ihmisten välisessä viestinnässä. Tässä kandidaatintutkielmassa keskitytään tarkastelemaan sanojen muodostumista sekä hymiöiden käyttöä synkronoidussa eli reaaliaikaisessa online - keskusteluhuoneessa DeviantART-sivustolla. Kirjoitetun kielen muutoksia tutkitaan englannin kielen kautta, mutta osa muutoksista (kuten lyhenteiden yleistyvä käyttö) näkyy jo myös muissakin internetissä käytetyissä kielissä. Esimerkiksi suomella on oma ”internet- slanginsa”…

Data Augmentation Approach in Bayesian Modelling of Presence-only Data

2011

Abstract Ecologists are interested in prediction of potential distribution of species in suitable areas, essential for planning conservation and management strategies. Unfortunately, often the only available information in such studies is the true presence of the species at few locations of the study area and the associated environmental covariates over the entire area, referred as presence-only data. We propose a Bayesian approach to estimate logistic linear regressions adapted to presence-only data through the introduction of a random approximation of the correction factor in the adjusted logistic model that allows us to overcome the need to know a priori the prevalence of the species.

Yliopistotutkintojen määrän ennustaminen Bayes-mallilla

2017

Tämän tutkielman tarkoituksena on kehittää prediktiivinen malli, jolla ennustetaan Jyväskylän yliopiston matemaattis-luonnontieteellisessä tiedekunnassa lähivuosina suoritettavien luonnontieteiden kandidaatin ja filosofian maisterin tutkintojen lukumääriä. Mallin estimointiin käytettävä aineisto koostuu kolmesta osasta: vuosina 1996–2004 tiedekunnassa aloittaneet opiskelijat, vuosina 2005–2015 tiedekunnassa alemmasta korkeakoulututkinnosta aloittaneet opiskelijat ja vuosina 2005–2016 tiedekunnassa ylemmästä korkeakoulututkinnosta aloittaneet opiskelijat. Jokaiselle aineiston osalle sovitetaan omat toisistaan riippumattomat osamallit. Tutkintoennusteet saadaan ennustamalla aineistoon kuuluvi…

Importance sampling type estimators based on approximate marginal Markov chain Monte Carlo

2020

We consider importance sampling (IS) type weighted estimators based on Markov chain Monte Carlo (MCMC) targeting an approximate marginal of the target distribution. In the context of Bayesian latent variable models, the MCMC typically operates on the hyperparameters, and the subsequent weighting may be based on IS or sequential Monte Carlo (SMC), but allows for multilevel techniques as well. The IS approach provides a natural alternative to delayed acceptance (DA) pseudo-marginal/particle MCMC, and has many advantages over DA, including a straightforward parallelisation and additional flexibility in MCMC implementation. We detail minimal conditions which ensure strong consistency of the sug…

Online trends, linguistic innovation and further implications in the language of the online consultation: a case study

2016

Integrating a corpus linguistic approach with content analysis and studies on computer mediated health discourse (Harvey and Koteyko, 2013), this study analyses the role of technology in healthcare communication and considers the evolutions in the doctor-patient exchange. Considering interactional norms, and the new literacy of online forum users (Jensen, Fage-Butler, 2014), this study investigates the trends and the linguistic patterns as well as the nature of digital doctor-patient exchanges in online question/ answer format frames, since specification of roles has changed and linguistic exchanges have evolved into different outcomes. In addition, the medium imposes its norms and a totall…

Bayesian hierarchical models in manufacturing bulk service queues

2006

In this paper, Queueing Theory and Bayesian statistical tools are used to analyze the congestion of various manufacturing bulk service queues with the same characteristics that are working independently of one another and in equilibrium. Hierarchical models are discussed in order to develop the whole inferential process for the parameters governing the system. Markov Chain Monte Carlo methods and numerical inversion of transforms are addressed to compute the posterior predictive distributions of the usual measures of performance in practice.

Bacillus subtilis BS-2 and Peppermint Oil as Biocontrol Agents Against Botrytis cinerea

2019

The purpose of this study was to assess the activity of Bacillus subtilis BS-2 and peppermint oil against Botrytis cinerea. In this study parameters such as the age and the density of the bacterial culture and the incubation temperature were taken into consideration. Furthermore, the cellulolytic activity of the bacterium was determined. The effect of peppermint oil was evaluated at a concentration range of 0.5-4.0 %. The research was conducted with a dual culture plate method. The influence of B. subtilis BS-2 and peppermint oil on the growth of B. cinerea was evaluated based on the growth rate index. It was noted that the bacterial culture occurred at an initial density of OD560 = 1.0, cu…

Bayesian inference for the extremal dependence

2016

A simple approach for modeling multivariate extremes is to consider the vector of component-wise maxima and their max-stable distributions. The extremal dependence can be inferred by estimating the angular measure or, alternatively, the Pickands dependence function. We propose a nonparametric Bayesian model that allows, in the bivariate case, the simultaneous estimation of both functional representations through the use of polynomials in the Bernstein form. The constraints required to provide a valid extremal dependence are addressed in a straightforward manner, by placing a prior on the coefficients of the Bernstein polynomials which gives probability one to the set of valid functions. The…

CMC features in lingua franca e-mail messages

2007

Deconvolution procedure of the UV-vis spectra. A powerful tool for the estimation of the binding of a model drug to specific solubilisation loci of b…

2015

UV-vis-spectra evolution of Nile Red loaded into Tween 20 micelles with pH and [Tween 20] have been analysed in a non-conventional manner by exploiting the deconvolution method. The number of buried sub-bands has been found to depend on both pH and bio-surfactant concentration, whose positions have been associated to Nile Red confined in aqueous solution and in the three micellar solubilisation sites. For the first time, by using an extended classical two-pseudo-phases-model, the robust treatment of the spectrophotometric data allows the estimation of Nile Red binding constant to the available loci. Hosting capability towards Nile Red is exalted by the pH enhancement. Comparison between bin…