Universities gather large volumes of data with reference to their students in electronic form. The advances in the data mining field make it possible to mine these educational data and find information that allow for innovative ways of supporting both teachers and students. This paper presents a case study on predicting performance of students at the end of a university degree at an early stage...

stagePop is an R package that can be used to model the deterministic dynamics and interactions of stage-structured populations. These are populations where the life cycle consists of distinct stages e.g. eggs, juveniles and reproductive adults. Explicitly including stage structure when modelling the population dynamics of stage-structured organisms can have an enormous effect on the resulting d...

The present paper contains the complete description of the external morphology of the first juvenile stage of Aegla perobae analysed through light microscopy (LM) and scanning electron microscopy (SEM). Newly-hatched juveniles were obtained from ovigerous females kept under laboratory conditions. Hatching is asynchronous, taking 2-4 days for all juveniles of a single brood to hatch. Average car...

Some populations of the newt Taricha granulosa possess extremely highconcentrations of the neurotoxin tetrodotoxin (TTX). Tetrodotoxin is present in adult newts and their eggs, but has been assumed to be absent from the larval stage. We testedlarval and metamorphosed juveniles for the presence of TTX and evaluated thepalatability of these developmental stages to predatory dragonfly ...

A new species of the genus Paratropis is described from North America: Paratropis tuxtlensis sp. n., from a tropical rainforest in Veracruz, Mexico. This is the fifth Paratropis and the tenth paratropidid species described and the first North American record of this Neotropical family. The species is described based on adult males and females, and juveniles. The juveniles show ontogenetic varia...

The prevention and control of root-knot nematode disease is a worldwide challenge there are not many varieties pesticides for control. To meet the huge market demand, development new nematicides urgently needed. lethal effects soil fumigant dimethyl disulfide (DMDS) mixed with chemical compounds copper sulfate (CuSO4) ammonium bicarbonate (NH4HCO3) on Meloidogyne incognita were tested using imm...

The relationship between root stunting caused by the cereal cyst nematode and levels of two root growth inhibiting hormones, abscisic acid and ethylene, was investigated in aseptically cultured root segments and in intact roots of two oat cultivars differing in tolerance to the nematode. Cultured root segments of oat cultivars New Zealand Cape (tolerant) and Sual (intolerant) were inoculated wi...

The northern root-knot nematode, Meloidogyne hapla, is one of the most important nematode pathogens occurring in cold regions. It is a sedentary, biotrophic parasites of plants and overwinter in the soil or in diseased roots. This study showed that the cold tolerance for the second-stage juveniles (J2) of M. hapla was moderate with the 50% survival temperature (S50) of -2.22°C and the fatal tem...