Search results for "Trie"
showing 10 items of 4468 documents
Wastewater nutrient removal in a mixed microalgae-bacteria culture: effect of light and temperature on the microalgae-bacteria competition.
2018
[EN] The aim of this study was to evaluate the effect of light intensity and temperature on nutrient removal and biomass productivity in a microalgae¿bacteria culture and their effects on the microalgae¿bacteria competition. Three experiments were carried out at constant temperature and various light intensities: 40, 85 and 125¿µE¿m¿2¿s¿1. Other two experiments were carried out at variable temperatures: 23¿±¿2°C and 28¿±¿2°C at light intensity of 85 and 125¿µE¿m¿2¿s¿1, respectively. The photobioreactor was fed by the effluent from an anaerobic membrane bioreactor. High nitrogen and phosphorus removal efficiencies (about 99%) were achieved under the following operating conditions: 85¿125¿µE¿…
Selecting the most suitable microalgae species to treat the effluent from an anaerobic membrane bioreactor.
2018
[EN] Conventional treatments for nutrient removal in wastewater are shifting to Anaerobic Membrane Bioreactors, which produce a high-quality effluent with minimum sludge production. The effluent resulting contains high nitrogen and phosphorus load that can be eliminated by microalgae culture. The aim of this study is to evaluate the ammonium and phosphorus removal rate of different microalgae species in the effluent of an anaerobic treatment. For that, 4 different microalgae species have been tested (Chlamydomonas reinhardtii, Scenedesmus obliquus, Chlorella vulgaris and Monoraphidium braunii) in batch monoculture and mixed conditions. Results indicate that all species are able to eliminate…
Terms of abuse as expression and reinforcement of cultures
2008
In this study terms of abuse are investigated in 11 different cultures, Spontaneous verbal aggression is to a certain extent reminiscent of the values of a certain culture. Almost 3000 subjects from Spain, Germany, France, Italy, Croatia, Poland, Great Britain, USA, Norway, Greece, and The Netherlands were asked to write down terms of abuse that they would use given a certain stimulus situation, and in addition, to give their rating of the offensive character of those terms. A total set of 12,000 expressions was collected. The frequencies of the expressions were established, and the total list of expressions was reduced to 16 categories. Results point to some etic taboos, like sexuality and…
ERP-implementering i en SMB : en casestudie i en kunnskapsintensiv bedrift
2011
Masteroppgave i informasjonssystemer- Universitetet i Agder 2011 Denne masteroppgaven bygger på en casestudie i et forlag. Hensikten med studien er dermed å avdekke hvilke utfordringer som kan relateres til implementeringen av et Enterprise Resource Planning system (ERP-system) i et forlag. Konteksten forlaget befinner seg i er spesiell for implementeringen av et ERP-system. Et forlag er en kunnskapsintensiv bedrift, og kjernekompetansen ligger i utnyttelsen av kunnskap for å tilby produkter av høy kvalitet. Ansatte i en kunnskapsintensiv bedrift er avhengige av fleksibilitet og et forlag møter dermed spesielle utfordringer relatert til implementeringen av et ERP-system. Hensikten med et ER…
Kritiske utfordringer ved implementering av et ERP-system i en SMB : en casestudie i en norsk bedrift
2011
Masteroppgave i informasjonssystemer- Universitetet i Agder 2011 ERP-systemer (Enterprise Resource Planning) er virksomhetsomspennende informasjonssystemer som stadig flere bedrifter tar i bruk. Spørsmålet som oftest stilles er ikke lenger om man skal anskaffe et ERP-system; det er hvilket system man skal anskaffe. Stadig mindre bedrifter implementerer ERP-systemer, også flere og flere SMBer (små og mellomstore bedrifter) med knappe ressurser. Implementeringsfasen blir dermed utfordrende for mange. En gjennomsnittlig SMB sitter på liten eller ingen kompetanse om ERP-systemer, og de fleste søker derfor hjelp av konsulenter. Denne masteroppgaven bygger på en casestudie gjennomført i bedriften…
Cascaded adaptive-mask algorithm for twin-image removal and its application to digital holograms of ice crystals.
2009
An iterative Gerchberg-Saxton-type algorithm with a support constraint for twin-image removal from reconstructed Gabor inline holograms of single plane objects is described. It is applied to simulated holograms and to holograms of ice crystals recorded in the laboratory and in atmospheric clouds in situ. The algorithm is characterized by a distinction between object and background region and an iterative adaption of the object mask. Applying the algorithm to recorded inline holograms of atmospheric objects, the twin-image artifacts are removed successfully, for the first time allowing for a proper access to the in situ phase information on atmospheric ice crystals. It is also demonstrated t…
Sex Classification of Face Areas
1998
Human subjects and an artificial neural network, composed of an autoassociative memory and a perceptron, gender classified the same 160 frontal face images (80 male and 80 female). All 160 face images were presented under three conditions (1) full face image with the hair cropped (2) top portion only of the Condition 1 image (3) bottom portion only of the Condition 1 image. Predictions from simulations using Condition 1 stimuli for training and testing novel stimuli in Conditions 1, 2, and 3, were compared to human subject performance. Although the network showed a fair ability to generalize learning to new stimuli under the three conditions, performing from 66 to 78% correctly on novel fa…
AUTOMATIC ORGANIZATION OF MULTIMEDIA DATA COLLECTIONS
2014
La fotografia digitale ha avuto uno sviluppo sempre crescente negli ultimi dieci anni. Prima la diminuzione dei prezzi delle apparecchiature di acquisizione e poi l’integrazione di queste nei dispositivi portatili di uso quotidiano (i.e. smartphone, tablet) ha permesso a chiunque di potere creare e conservare semplicemente un enorme numero di immagini. Inoltre l’immagine stessa é diventata uno strumento di comunicazione, portando alla nascita di social networks basati unicamente sulla condivisione di fotografie (flickr, instagram, etc...). La gestione di tali quantitá di dati é quindi diventato un problema reale per molti utenti, in quanto il ritrovamento e l’organizzazione di questi dati é…
Multifacet structure of observed reconstructed integral images.
2005
Three-dimensional images generated by an integral imaging system suffer from degradations in the form of grid of multiple facets. This multifacet structure breaks the continuity of the observed image and therefore reduces its visual quality. We perform an analysis of this effect and present the guidelines in the design of lenslet imaging parameters for optimization of viewing conditions with respect to the multifacet degradation. We consider the optimization of the system in terms of field of view, observer position and pupil function, lenslet parameters, and type of reconstruction. Numerical tests are presented to verify the theoretical analysis.
A simple and efficient face detection algorithm for video database applications
2000
The objective of this work is to provide a simple and yet efficient tool to detect human faces in video sequences. This information can be very useful for many applications such as video indexing and video browsing. In particular the paper focuses on the significant improvements made to our face detection algorithm presented by Albiol, Bouman and Delp (see IEEE Int. Conference on Image Processing, Kobe, Japan, 1999). Specifically, a novel approach to retrieve skin-like homogeneous regions is presented, which is later used to retrieve face images. Good results have been obtained for a large variety of video sequences. Peer Reviewed