Periodic models for seasonal data allow the parameters of the model to vary across the different seasons. This paper uses the components of UK consumption to see whether the periodic autoregressive (PAR) model yields more accurate forecasts than non-periodic models, such as the airline model of Box and Jenkins (1970), and autoregressive models that pre-test for (seasonal) unit roots. We analyse...

This paper attempts to compare the forecasting performance of the ARIMA model and hybrid ARMA-GARCH Models by using daily data of the Iran’s exchange rate against the U.S. Dollar (IRR/USD) for the period of 20 March 2014 to 20 June 2015. The period of 20 March 2014 to 19 April 2015 was used to build the model while remaining data were used to do out of sample forecasting and check the forecasti...

The aim of this article is to carry out analysis enhance the performance ferro fluid lubricated porous step bearing. coating assorted lower flat impermeable surface. A there in upper surface which approaching This study considered that magnetic field flexible and oblique By considering Jenkins Model, expressions for pressure load capacity are obtained. non-dimensional also calculated various pa...

Social media gives previously silent masses an expressive voice in a possible participatory democracy. The majority of these are critiques Henry Jenkins' writings, who is advocate web-based Jenkins was attacked by Fuchs for minimizing participation to its cultural value and so disregarding the importance ownership determining scope mode participation. A truly democracy must also be property dem...

A problem of Siegler’s (1981) rule assessment methodology is that the assignment of subjects to rules takes place by an arbitrary criterion. This problem can be solved by latent class analysis by which we can test statistically how many rules are needed to fit the data and which these rules are. Two data sets of the balance scale test are analyzed. The first empirical data set stems from a stud...

Finansal verilerin en dikkate değer özelliklerinden biri zamana bağlı biçimde bir dizi teşkil etmeleridir. Bundan ötürü zaman serilerinin unsurları, söz konusu ifade ettiği ekonomik ve finansal parametreler hakkındaki bilgiyi de kapsamaktadır. Finans çalışmalarında değişkenlere ilişkin öngörü ya da tahmin hayati öneme sahiptir. değişkenlerin doğru, sağlıklı edilebilmesi, piyasalardaki paydaşlar...

The paper by Jenkins et al. (6) provides interesting data on Cryptosporidium parvum oocyst permeability and survival. The vital dye assay (4) relies upon oocyst permeability and exhibits limitations, especially in assessment of disinfectant efficacy (3). However, it is rewarding to note that it is considered to have utility and can provide pertinent data. Although we agree with many points addr...