Ecucational data mining (EDM) para la determinación de comportamientos en estudiantes de ingeniería en la modalidad virtual de UDE

[ES]En este artículo se describe la experiencia de la aplicación de técnicas de EDM (clustering) a un curso disponible en la plataforma Ude@ de la Universidad de Antioquia. El objetivo es clasificar los patrones de interacción de los estudiantes a partir de la información almacenada en la base de datos de la plataforma Moodle. Para ello, se generan informes sobre el uso de los recursos y la autoevaluación que permiten analizar el comportamiento y los patrones de navegación de los estudiantes durante el uso del LMS (Learning Management System).

Le juif errant d'aujourd'hui : et́ude sur l'eḿigration des Israélites de l'Europe orientale aux Etats-Unis de l'Amérique du Nord ; avec 40 tabl. statistiques et 9 diagr.

par L. Hersch

Gebäude für Sammlungen und Ausstellungen.

Mode of access: Internet.

Jubiläums-Kunstausstellung, 1898 : Künstlerhaus und Musikvereinsgebäude, Wien, 19. April 1898 /

Includes index.

Historisch-kritisches Lehrgebäude der hebräischen Sprache ...

Mode of access: Internet.

Sefer keter Torah : kolel kol piḳude 'D hinamo taryag mitsṿot ha-Torah ʻaśeh ṿe-lo taʻaśeh ʻim shevaʻ mitsṿot de-rabanan ha-ʻolot yaḥad le-mispar 620 be-maʻaṭeh melitsah meʻuṭafot uve-ḥaruze penine shir meʻulafot uve-shum ʻalimo nosafot /

Title on added t.p.: Kether Thora.

Deutsche Kunst Darmstadt 1918 : unter dem Schutze Einer Königlichen hoheit des Grossherzogs von Hessen : illustrierter Katalog : 18. Mai bis 18. Ottober 1918, Städtisches Ausstellungsgebäude, Mathildenhöhe.

Mode of access: Internet.

Quatrième congrès international des délégués représentant les associations des maîtres filateurs et manufacturiers du coton, tenu dans les salles du musikvereinsgebäude de Vienne (Autriche), du 27 au 29 mai, 1907.

Half-title: Rapport officiel du quatrième congrès international cotonnier.

Prikaz sbora ratnykh li͡udeĭ, 146-161, 1637-1653 gg. /

In Cyrillic characters.

Historiske fortællinger om islændernes færd hjemme og ude /

1. bind. Fortælling om Egil Skallegrimsen.--2. bind. Fortælling om Gunlaug Ormstunge og Skjald-Rafn. Fortælling om Laxdælerne. Fortælling om Kormak.--3. bind. Fortælling om Njal og hans sønner.--4. bind. Fortælling om Vatnsdølerne. Fortælling om Finboge den Stærke. Fortælling om Eyrbyggerne. Fortælling om Gretter den Stærke. Fortælling om Svarfdølerne.

Ude og hjemme : reise-erindringer /

Mode of access: Internet.

Trends in nitrate-nitrogen, nitrite-nitrogen and phosphorus concentration in Ebonyi river, Nigeria

A baseline study of the limnological integrity of Ebonyi River, a tropical lotic system in south-eastern Nigeria was conducted between September 2006 and February 2008 to assess its potential in enhancing fisheries production for the benefit of the rural poor, who depend on the resources of the river for survival. The parameters measured were nitrate-nitrogen, nitrite-nitrogen and phosphate-phosphorus. Results show that nitrate varied between 40.43mg/L in September 2006 and 1.73mg/L in December 2007, Showing significant difference (P<0.01) among months. The values recorded for nitrites varied between 0.2mg/L in September 2006 and 0.4mg/L in February 2008, showing significant (P<0.01) variation among months. Values recorded for phosphorus was highest (0.05mg/L) in the month of October 2006 while the least mean value (0.32mg/L) was recorded in the month of May 2007 and showed significant (p<0.01) variation in monthly means. It was concluded that the values of the measured parameters falls within tolerable range for enhanced fisheries development in the area. KEYWORDS: Limnology, Tropical, River, Monthly, Mean, Variation

Effect of crude oil and some petroleum products on Clarias Gariepinus fingerlings (Catfish: Claridae)

Ninety (90) hatchery bred fingerlings of Clarias gariepinus (mean weight: 0.96 ± 0.1g) were randomly placed in 15 plastic baths (25 litres each) at the Research laboratory and were exposed to different concentrations of oil products to determine their effects on the fish, to facilitate inferential deductions that will enhance effective aquatic environmental management. Three (3) replicate basins of 5 experimental treatments (crude oil, petrol oil, kerosene oil, engine oil and control) were used at a concentration of 1.25ml. L-1. The control experiment was devoid of oil treatment. Six (6) fingerlings were placed in each replicate basin, flooded with 20 litres of clean tap water and fed with nutrafin cichilid food, 2 times daily at 3% body weight. The results showed that the feeding behaviour and swimming performances of fish were reduced after 24 hours of the addition of the various oil pollutants. Mortality of fingerlings in the oiled basins increased as the hours of exposure increased (i.e. 24, 48, 72 and 96 hours). Recovery was not immediate in the treated basin while surviving fingerlings in the control basins grew up to post-fingerlings after 90 days (3 months). There were significant differences (P<0.01 and P<0.05) in the effect of crude oil and the petroleum products on the mortality rate of C. gariepinus when exposed to oil pollutants at 1.25ml. L-1 concentration

Monthly spatial occurrence of phytoplankton and zooplankton in River Ogun, Abeokuta, Ogun State, southwest Nigeria

The aim of this study was to investigate the monthly spatial occurrence of phytoplankton and zooplankton in River Ogun, Abeokuta, Southwest Nigeria. This was carried out for seven months between December, 2011 and June, 2012 in 4 stations. A total of 41 species of phytoplankton and 16 zooplankton species from 5 classes respectively were recorded. Zooplankton was dominated by Cladocera throughout the study period while phytoplankton was dominated by blue green algae (Cyanophyta or Cyanobacteria). The dominance of Cyanophyta in this river is similar to findings by Sekadende and co-workers, Ogato, Deng and co-worker, and Shakila and co-worker. The dominance of Cladocera in this river is similar to findings by Ude and co-workers, and Ogbuagu and co-worker.