Search results for "BLE"
showing 10 items of 23353 documents
La Géométrie pour l'Unicité, la Parcimonie et l'Appariement des Estimateurs Pénalisés
2022
During the talk we will give a necessary and sufficient condition for the uniqueness of a penalized least squares estimator whose penalty term is a polyhedral norm. Our results cover many methods including the OSCAR, SLOPE and LASSO estimators as well as the related method of basis pursuit. The geometrical condition for uniqueness involves how the row span of the design matrix intersects the faces of the dual normunit ball. Theoretical results on sparsity by LASSO and basis pursuit estimators are deduced from this condition via the characterization of accessible sign vectors for these two methods.
Inferring Phytoplankton, Terrestrial Plant and Bacteria Bulk δ¹³C Values from Compound Specific Analyses of Lipids and Fatty Acids.
2015
Stable isotope mixing models in aquatic ecology require δ13C values for food web end members such as phytoplankton and bacteria, however it is rarely possible to measure these directly. Hence there is a critical need for improved methods for estimating the δ13C ratios of phytoplankton, bacteria and terrestrial detritus from within mixed seston. We determined the δ13C values of lipids, phospholipids and biomarker fatty acids and used these to calculate isotopic differences compared to the whole-cell δ13C values for eight phytoplankton classes, five bacterial taxa, and three types of terrestrial organic matter (two trees and one grass). The lipid content was higher amongst the phytoplankton (…
Effects of NAA and Ecklonia maxima Extracts on Lettuce and Tomato Transplant Production
2022
Ecklonia maxima and the commercial biostimulants produced from it contain various plant growth regulators that are responsible for the growth stimulation recorded in many crops. Auxins are one of the major plant growth regulators contained in E. maxima extracts. The aim of this research was to evaluate the growth-promoting effect of a seaweed extract from E. maxima on lettuce and tomato transplant production under nursery conditions, and to compare the effect of this extract with an equal concentration of synthetic auxin. Two doses of natural or synthetic exogenous auxins (50 or 100 μg L−1) were supplied to the substrate through the irrigation water with an ebb and flow system, 4, …
Quality and Shelf-life of Minimally Processed Cauliflower
2011
Cauliflower has been described as a vegetable with a high nutritional value due to its important content of vitamins, antioxidants and anti-carcinogenic compounds. Cauliflower inflorescences are harvested while they are totally immature, which implies severe changes in nutrient, water and hormonal status. Harvesting and the following processing can cause a severe stress determining the appearance of accelerated senescence symptoms. The effect of processing and cold storage of minimally processed cauliflower were investigated. Florets were treated with antioxidants before storage in PE bags at 4°C for 14 days. During storage period, weight loss, colour, firmness, SSC, pH, titratable acidity,…
Effectiveness of a kindergarten-based intervention to increase vegetable intake and reduce food neophobia amongst 1-year-old children: a cluster rand…
2021
Background: Children’s first years of life are crucial to their future health. Studies show that a varied diet with a high intake of vegetables is positive in several domains of health. The present low vegetable intake amongst children is, therefore, a concern. Food neophobia is a common barrier to vegetable intake in children. As most Norwegian children attend kindergarten from an early age, kindergartens could contribute to the prevention of food neophobia and the promotion of vegetable intake. Objective: The aim of this study was to assess the effect of a cluster randomised trial amongst 1-year-old children in kindergarten to reduce food neophobia and promote healthy eating. Methods: Kin…
L’image des légumes
2017
Au sein du vaste champ de recherche qu’est l’alimentation, les légumes et les représentations qu'en ont les mangeurs ont été délaissés malgré la place importante qu'ils occupent dans les discours officiels depuis la mise en place en 2001 du PNNS. Dans un contexte de stagnation de leur consommation, il semble judicieux de tenter de comprendre quels en sont les freins. Notre hypothèse veut que les discours médiatiques sur le sujet, dans la lignée du discours des autorités publiques, présentent les légumes avant tout comme un aliment fonctionnel, dans un pays où le goût et le plaisir restent pourtant des piliers de la culture alimentaire. Pour mettre à l’épreuve ce postulat, notamment à traver…
From soil to soil-less in horticulture: quality and typicity
2013
In this review, the technique of soil-less cultivation of horticultural crops is analysed, the main differences between this and traditional cultivation techniques are described, and the advantages and disadvantages of each method in relation to the others are identified. Soilless cultivation has revolutionised various sectors of vegetable and floriculture production, and recent years have also seen interest being shown by Italian fruit crop producers, particularly those involved in table grape viticulture. The various issues related to the use of this technique are described in relation to the needs of the substrate, water management, and mineral nutrition of the different species, and to …
Development of healthy eating in children: from research to public health perspective
2019
International audience
Inntak av frukt og grønnsaker fra barndom til voksen alder i relasjon til sosioøkonomisk status
2017
Masteroppgave folkehelsevitenskap ME516 - Universitetet i Agder 2017 Background: The consumption of fruits and vegetables are lower than recommended in the Norwegian population. Studies have shown that groups of high socioeconomic status have a higher consumption of fruits and vegetables than groups of low socioeconomic status. Purpose: The purpose of the task is to investigate (1) how the consumption of fruit and vegetables has changed from childhood to adulthood, (2) how socioeconomic status, measured with different indicators, is associated with consumption of fruits and vegetables, and (3) in what way the development of fruit and vegetable intake has changed from childhood to adulthood …
Kasvisten, hedelmien ja marjojen syömisen lisääntyminen ryhmäohjauksessa
2017
Tämän tutkimuksen tarkoituksena oli selvittää Keski-Suomen alueella toteutettuun ryhmäohjaukseen osallistuneiden ryhmäläisten kasvisten syömistä 12 kuukauden aikana. Tavoitteena oli tutkia tuoreiden kasvisten, kypsennettyjen kasvisten sekä hedelmien ja marjojen käyttöä ja niiden syönnissä tapahtunutta muutosta. Lisäksi selvitettiin, miten sukupuoli, paino, painoindeksi, vyötärönympärys ja elämäntilanne ovat yhteydessä kasvisten syömiseen sekä miten yksilön aikomus muuttaa ruokakäyttäytymistä vaikuttaa itse muutoksen tekemiseen. Tutkimus on osa Keski-Suomen alueella toteutettua ryhmäohjausta (2011-2016) ja tutkimusaineisto kerättiin kyselylomakkeella alku- (0 kk), väli- (6 kk) ja loppumittau…