Search results for "Lever"
showing 10 items of 191 documents
Floral Diversity and Pollen Transfer Mechanisms in Bird-pollinated Salvia Species
2007
† Background and Aims Bird-pollinated (ornithophilous) Salvia species (sages) transfer pollen either by means of a staminal lever mechanism or by immovable stamens. As the distribution of the two modes within the genus is not known, we present a survey of all ornithophilous sages. The main focus is given to floral diversity especially with respect to functional lever morphology. Thereby the hypothesis is tested that, due to a pollinator shift from bees to birds, the lever mechanism became unnecessary. † Methods To get a general idea about the diversity of pollen transfer mechanisms, 186 ornithophilous Salvia species were classified according to the functional morphology of the stamen and th…
Le decisioni di co-branding: un'analisi ragionata della letteratura e nuovi percorsi di ricerca
2021
Abstract Obiettivi. Una decisione fondamentale nell’ambito del marketing strategico riguarda l’associazione di due brand per la promozione di un unico prodotto. Per questa ragione, non sorprende che, negli ultimi decenni, gli studi internazionali abbiano ampiamente esplorato gli antecedenti della decisione di co-branding nonché le differenze in termini di risultati tra i due brand alleati. L’ampio numero di studi sul co-brand, le molteplici prospettive teoriche e approcci empirici fanno emergere l’opportunità di riassumere lo stato dell’arte sul co-brand e, facendo leva sui risultati, presentare una agenda strutturata per futuri studi. Metodologia. Sviluppiamo un’analisi sistematica della l…
Construction stages of cable-stayed bridges with composite deck
2012
A cable-stayed bridge is built by following a construction sequence of different subsequent stages that imply changes of the geometric configuration, restraints and consequently stress and strain patterns. A study is presented about stay stressing sequences in cable-stayed bridges with composite deck for the case of construction made by the cantilever method. Initial cable forces are found through partial elastic schemes of construction stages. Different stay stressing procedures are implemented and a comparison between them is proposed in order to evaluate the differences in terms of deformed shape and internal force distribution of the deck and the pylon. Results can be useful to give pra…
Assessment and strengthening of reinforced concrete bridges with half-joint deterioration
2022
Existing Niagara-type concrete cantilever bridges, which in Italy are called Gerber bridges, suffer from degradation due to reinforcement corrosion and a consequent reduced load-bearing capacity. The assessment of these structures is therefore an important part of the procedures for analyzing the state of existing bridges and any interventions required for their retrofitting. In particular, safety against failure of the half-joint must be evaluated with respect to the behavior of the entire bridge and its state of conservation, determining what the conditions are that lead to failure, in terms of loads, state of stress, and possibly cracking state. This evaluation has to be carried out cons…
Lexikal transfer från engelska i högstadieelevers och gymnasisters texter samt svensklärares attityder till engelska i det svenska språket
2016
Tutkielman tarkoituksena oli kartoittaa, miten englannin kielen vaikutus näkyy yläasteikäisten ja lukioikäisten kirjoittamissa ruotsinkielisissä teksteissä leksikaalisella tasolla. Lisäksi tutki-muksessa tarkasteltiin ruotsinopettajien asenteita englannin kielen vaikutusta kohtaan ruotsin kielessä. Opettajien asenteita tutkittiin nettikyselyn avulla ja kyselyyn osallistui yhteensä 156 opettajaa. Oppilastekstit valittiin A1- ja A2-tasoilta ja tekstejä oli yhteensä 115. Tutkimustulok-set analysoitiin sekä kvantitatiivisin että kvalitatiivisin menetelmin. Tutkimuksen tulokset osoittavat, että englannin vaikutus näkyy eniten lainasanojen käytössä sekä sanoissa, joissa yhdistyy piirteitä sekä ru…
On the use of unmanned aerial systems for environmental monitoring
2018
[EN] Environmental monitoring plays a central role in diagnosing climate and management impacts on natural and agricultural systems; enhancing the understanding of hydrological processes; optimizing the allocation and distribution of water resources; and assessing, forecasting, and even preventing natural disasters. Nowadays, most monitoring and data collection systems are based upon a combination of ground-based measurements, manned airborne sensors, and satellite observations. These data are utilized in describing both small-and large-scale processes, but have spatiotemporal constraints inherent to each respective collection system. Bridging the unique spatial and temporal divides that li…
Leverage and Family Firms
2020
This chapter analyses the relationship between ownership structure and leverage, providing an integrated theoretical approach that combines traditional financial theories, agency theory, and recently developed theories relating to non-financial preferences. The results show that, after controlling for endogeneity, being a family firm has a positive effect on the propensity to incur debt. These findings add to the existing body of literature and underline the need for a multi-theoretical approach when explaining the capital structure of family firms. The authors apply panel data methodology to control for individual heterogeneity of family firms. The chapter uses a sample of Spanish firms op…
“Face the cow”: reconnecting to nature and increasing capacities for pro-environmental agency
2020
Arts-based practices can support sustainability, combined with research that points out needs for intervention. We practiced environmental sensitivity and dialogic art with fifth-grade school pupils as part of an International Socially Engaged Art Symposium (ISEAS2019). Using arts-based action research methodology, our case study focused on the opportunities of arts-based environmental education in advancing the management of meadows and wood-pastures. We explored nature connectedness and pro-environmental mindsets and behaviors among the pupils and artists/researchers. The artistic results encompassed the dialogic interactions of the intervention, exhibited artworks, and audiovisual docume…
En studie av högstadieelevers inlärningsstrategier i svenska
2016
Tutkielman tarkoituksena oli kartoittaa yläkouluikäisten oppilaiden oppimisstrategioiden käyttöä B1-ruotsin opiskelussa. Tutkimukseen osallistui 68 B1-ryhmälästä 7. ja 9. vuosikurssilta. Lisäksi vertailussa oli mukana yksi A-ruotsin ryhmä 9. vuosikurssilta, joka käsitti 14 oppilasta. Tutkimuksen materiaali kerättiin internetkyselyn avulla keväällä 2016. Analyysissa tarkasteltiin oppimisstrategioiden käyttöä yläkoulussa yleisellä tasolla sekä vertailtiin niiden käyttöä eri ikäryhmien ja sukupuolten välillä. Lisäksi tutkittiin, kokivatko oppilaat saaneensa tarpeeksi tietoa oppimisstrategioista koulussa. Tutkimustulosten perusteella, kohderyhmässä käytettiin oppimisstrategioita laajasti. Strat…
Le leverage buy-out
1998
Les acquisitions de sociétés à l'aide d'un holding endetté, ou leverage buy-outs (LBO), ont connu un essor remarquable aux Etats-Unis (depuis les années 1970) et en Europe (à partir des années 1980). Ces opérations permettent aux acquéreurs (capital-investisseurs, personnes physiques...), de conserver ou d'acquérir le contrôle de la société visée tout en minimisant leurs apports en fonds propres. La première partie de cet article est consacrée aux montages de ces opérations et à la mobilisation des effets de leviers juridiques et financiers. Après une présentation du marché français des LBO, la seconde partie étudie l'évolution de la performance de la cible et la longévité de ces opérations.