Forecasting overseas visitors into the United Kingdom using continuous time and autoregressive fractional integrated moving average models with discrete data

This paper applies Gaussian estimation methods to continuous time models for modelling overseas visitors into the UK. The use of continuous time modelling is widely used in economics and finance but not in tourism forecasting. Using monthly data for 1986–2010, various continuous time models are estimated and compared to autoregressive integrated moving average (ARIMA) and autoregressive fractionally integrated moving average (ARFIMA) models. Dynamic forecasts are obtained over different periods. The empirical results show that the ARIMA model performs very well, but that the constant elasticity of variance (CEV) continuous time model has the lowest root mean squared error (RMSE) over a short period.

High-Accuracy Low-Cost RTK-GPS for an Unmanned Surface Vehicle

This work presents a low cost RTK-GPS system for localization of unmanned surface vehicles. The system is based on the use of standard low cost L1 band receivers and in the RTKlib open source software library. Mission scenarios with multiple robotic vehicles are addressed as the ones envisioned in the ICARUS search and rescue case where the possibility of having a moving RTK base on a large USV and multiple smaller vehicles acting as rovers in a local communication network allows for local relative localization with high quality. The approach is validated in operational conditions with results presented for moving base scenario. The system was implemented in the SWIFT USV with the ROAZ autonomous surface vehicle acting as a moving base. This setup allows for the performing of a missions in a wider range of environments and applications such as precise 3D environment modeling in contained areas and multiple robot operations.

A private library in the Mateus Palace (Vila Real). The D. Luís António de Sousa Botelho Mourão (1722-1798) Books Collection

Fundação para a Ciência e Tecnologia no âmbito de Bolsa de Doutoramento (SFRH/BD/86280/2012)

1964-65 Library Officers

Pictured here from left to right - Back Row: John Burtniak, Cataloguing. Nick Krenton, Head Cataloguing. Front Row: Sylvia Osterbind, Reference. Arthur Vespry, Chief Librarian. Mara Karnupe, Technical Services. Dianna Kertland, Circulation.

Glenridge Campus Library

View of the interior of the original library.

Cloning of actin genes from a genomic library of the newt, Notophthalmus viridescens

The regenerating urodele limb is a useful model system in which to study, in vivo, the controls of cell proliferation and differentiation. Techniques are available which enable one to experimentally manipulate mitogenic influences upon the blastema, as well the morphogenesis of the regenerating 11mb. Although classical regeneration studies have generated a wealth of knowledge concerning tissue interactions, little 1s known about the process at the level of gene expression. The aim of this project was to clone potentially developmentally regulated genes from a newt genomic library for use in future studies of gene expression during limb regeneration. We decided to clone the cytoskeletal actin gene for the following reasons: 1. its expression reflects the proliferative and differentiatlve states of cells in other systems 2. the high copy number of cytoplasmic actin pseudogenes in other vertebrates and the high degree of evolutionary sequence conservation among actin genes increased the chance of cloning one of the newt cytoplasmic actin genes. 3. Preliminary experiments indicated that a newt actin could probably be identified using an available chick ~-actln gene for a molecular probe. Two independent recombinant phage clones, containing actin homologous inserts, were isolated from a newt genomic library by hybridization with the chick actin probe. Restriction mapping identified actin homologous sequences within the newt DNA inserts which were subcloned into the plasmid pTZ19R. The recombinant plasmids were transformed into the Escherichia coli strain, DHsa. Detailed restriction maps were produced of the 5.7Kb and 3.1Kb newt DNA inserts in the plasmids, designated pTNAl and pTNA2. The short «1.3 Kb) length of the actin homologous sequence in pTNA2 indicated that it was possibly a reverse transcript pseudogene. Problems associated with molecular cloning of DNA sequences from N. viridescens are discussed with respect to the large genome size and abundant highly repetitive DNA sequences.

American Library Association, twenty-fifth annual conference, Niagara Falls, June 22-27, 1903. --

A history of Niagara Falls, including the Programme for the Conference.

Clara Irvin Chapman, Thurmond Clarke Memorial Library Heritage Room, Chapman College, Orange, California

Clara Irvin Chapman's last visit to the Chapman campus was in March, 1967 for the opening of the Thurmond Clarke Memorial Library. She is in the Heritage Room by a portrait of her late husband, Charles Clarke Chapman, for whom the college is named.

Clara Irvin Chapman, Thurmond Clarke Memorial Library Heritage Room, Chapman College, Orange, California

Clara Irvin Chapman's last visit to the Chapman campus was in March, 1967 for the opening of the Thurmond Clarke Memorial Library. She is in the Heritage Room by a portrait of her late husband, Charles Clarke Chapman, for whom the college is named.

Clara Irvin Chapman, Thurmond Clarke Memorial Library Heritage Room, Chapman College, Orange, California

Clara Irvin Chapman's last visit to the Chapman campus was in March, 1967 for the opening of the Thurmond Clarke Memorial Library. She is in the Heritage Room of the library.

Clara Irvin Chapman, Thurmond Clarke Memorial Library Heritage Room, Chapman College, Orange, California

Clara Irvin Chapman's last visit to the Chapman campus was in March, 1967 for the opening of the Thurmond Clarke Memorial Library. She is in the Heritage Room by a portrait of her late husband, Charles Clarke Chapman, for whom the college is named.