Search results for "Flow"
showing 10 items of 5185 documents
Tutkimus kirjoittamisen tilan luomisesta : subjunktiivi, flow, rituaali ja habitaatti
2017
Tutkin luovan kirjoittamisen tilan luomista. Hahmotan, mistä tekijöistä se muodostuu ja millaisessa suhteessa nämä osatekijät ovat toisiinsa. Erityisen kiinnostunut olen siitä, millainen on pitkään jatkunut luovan kirjoittamisen tila erään tarinan osalta, ja millä tavoin pitkäaikaisuus ja jatkuvuus ovat vaikuttaneet tuohon tilaan. Pro gradu -tutkielmani on autoetnografinen tapaustutkimus ja aineistona toimii työskentelypäiväkirjani, jota pidin vuoden ajan pitkään kirjoittamani tarinan parissa työskentelystä tätä tutkielmaa varten. Luovuutta lähestyn psykologian näkökulmasta: Mihaly Csikszentmihalyin mukaan luovuus on prosessi, jonka kautta muutetaan ja muokataan kulttuurin symbolista aluett…
La nuisibilité directe des adventices en grandes cultures : quelles réponses nous apportent les essais désherbages ?
2016
The direct harmful effect of weeds in field crops : what do herbicide trials tell us ? Weeds are plants whose undesirable qualities (“harmfulness") outweigh their desirable qualities (trophic resources). Few studies conclude that weeds do not affect crop yield. However, it is difficult to generalize since weeds compete with crops for resources and these resources are spatially and temporally variable. This study analyzed 110 herbicide trials (untreated vs. treated plots) performed in France from 1993 to 2015 on three major grain crops: winter wheat, winter oilseed rape and sunflower. Significant yield losses were found in 92% of wheat trials (average over all trials: -2.6 t/ha), 51% of wint…
THE DEVELOPMENT OF BUSINESS LOGISTICS CONCEPT. FROM OPERATIONAL MANAGEMENT OF LOGISTICS PROCESSES TO THE INTEGRATED FLOW MANAGEMENT WITHIN THE SUPPLY…
2019
Background: Firms constantly search for ways enabling them to achieve and maintain longterm competitive advantage. Among the most significant concepts influencing the achievement of such an advantage by a firm, an important role is played by the business logistics concept. The aim of the chapter is to identify the most important stages of the logistics concept development, ranging from the operational management of logistics processes to the integrated flow management throughout the entire supply network. Methods: The chapter has a conceptual character. A review of significant works devoted to the development of the logistics concept in business was carried out. Within the chapter there is …
Scattering of Co-Current Surface Waves on an Analogue Black Hole
2018
We report on what is to our knowledge the first scattering experiment of surface waves on an accelerating transcritical flow, which in the analogue gravity context is described by an effective spacetime with a black-hole horizon. This spacetime has been probed by an incident co-current wave, which partially scatters into an outgoing countercurrent wave on each side of the horizon. The measured scattering amplitudes are compatible with the predictions of the hydrodynamical theory, where the kinematical description in terms of the effective metric is exact.
Control of the Development of Swirling Airflow Dynamics and Its Impact on Biomass Combustion Characteristics
2017
Abstract The development of the swirling flame flow field and gasification/ combustion dynamics at thermo-chemical conversion of biomass pellets has experimentally been studied using a pilot device, which combines a biomass gasifier and combustor by varying the inlet conditions of the fuel-air mixture into the combustor. Experimental modelling of the formation of the cold nonreacting swirling airflow field above the inlet nozzle of the combustor and the upstream flow formation below the inlet nozzle has been carried out to assess the influence of the inlet nozzle diameter, as well primary and secondary air supply rates on the upstream flow formation and air swirl intensity, which is highly …
An explicit unconditionally stable numerical solution of the advection problem in irrotational flow fields
2004
[1] A new methodology for the Eulerian numerical solution of the advection problem is proposed. The methodology is based on the conservation of both the zero- and the first-order spatial moments inside each element of the computational domain and leads to the solution of several small systems of ordinary differential equations. Since the systems are solved sequentially (one element after the other), the method can be classified as explicit. The proposed methodology has the following properties: (1) it guarantees local and global mass conservation, (2) it is unconditionally stable, and (3) it applies second-order approximation of the concentration and its fluxes inside each element. Limitati…
On Stability of a Concentrated Fiber Suspension Flow
2014
Linear stability analysis of a fiber suspension flow in a channel domain is performed using a modified Folgar-Tucker equation. Two kinds of potential instability are identified: one is associated with overcritical Reynolds number and another is associated with certain perturbations in fiber orientation field and is present for any Reynolds numbers. The second type of instability leads to initially growing transient perturbations in the microstructure. It is shown that both types of instability lead to instability of the bulk velocity field. As for the perturbed Orr-Sommerfeld eigenvalues, the presence of fibers increases the stability region; the stability region increases with growing C i …
Evaluation of asset replacement strategies considering economic cycles: lessons from the machinery rental business
2015
Contains fulltext : 144492.pdf (Publisher’s version ) (Open Access) In businesses with heavy capital investments, the effective management of assets is crucial, in particular in the fleet rental business where assets are the major source of revenues. One important question in this regard concerns the replacement of used assets and the purchase of new assets. Thus, the objective of this study is to evaluate performance effects of asset replacement strategies. In order to maximise net cash flow of a rental company for construction machinery, a range of scenarios investigating the timing and nature of policies for replacing the fleet are analysed. Simulation findings are then discussed to gene…
Lack of Good Governance or hazard of consumers e-Health? Evidence through a dynamic outcome based-performance in the Italian healthcare sector about …
This research aims to analyse the management of the health policies to contain the measles outbreaks in Italy. In particular, this study wants to find out what are the key factors that led to the measles outbreak of 2017 and its previous cyclical trend, analysing the impact of ehealth strategy in the management of the epidemics. Understanding the complexity of this issue will help to evaluate the actual policies of the Italian Ministry of Healthcare and to steer the policy-makers to frame sustainable policies to manage the risk of a measles outbreak. The thesis is structured in four chapters. The first chapter, through a literature review, discusses the evolution of the management of epidem…
Sävellystyön prosessi
2014
Kandidaatintutkielma kuvaa sävellysprosessia luovan ongelmanratkaisun näkökulmasta ja peilaa sitä tekijän omiin havaintoihin omasta sävellysprosessistaan. Tutkielma pohjaa pitkälle Yrjö Heinosen (1995) sävellyksen prosessimalliin, ja siinä pohditaan säveltämistä tekijän näkökulmasta myös yleisellä tasolla. Kiinnostuin aiheesta itse, koska olen ammattisäveltäjä, ja tahtoisin tällä tavalla valottaa säveltämisen käytäntöjä ja pohtia sen merkitystä työn tekemisenä. Tämä tutkimus toimii pohjana Pro Gradu –tutkielmalleni, jossa aion tehdä tapaustutkimuksen omasta sävellysprosessistani.