Search results for "Dynamic"

X-ray emission from fast moving shocks in the protostellar jet HH 154: a binding diagnostic of the emission mechanism

2004

We propose to determine the proper motion of the X-ray source associated with HH 154, the only known protostellar jet in which the X-ray emission mechanism can be studied in detail. Our numerical simulations indicate that the X-rays are produced in a fast-moving (500 km/s) post-shock region, and our HST observations show high proper motion shocked material moving at similar speed. Detection (or lack of) of proper motion of the X-ray source will strongly confirm (or falsify) our model, and constitute the basis for a general theory of X-ray emission in protostellar jets. Understanding and modeling the emission mechanism is key to assess the lifetime of the X-ray emission and thus the influenc…

Hydrodynamic simulations of the shock-cloud interaction in the Vela supernova remnant

2005

Velocity field computation in bends of shallow channels

1998

Application of Dora-2D model to a distributed catchment dynamics

2001

A new approach for a robust solution of the fully dynamic De Saint Venant equations

2000

The Dora 2D Model: Application to a Natural Carchment in Southern Italy

2002

Modelling of the hydrodynamics of concurrent gas and liquid flow through packed bed

2016

The aim of the present study is to simulate concurrent gas and liquid flow through packed bed in the gas continuous flow regime (GCF) and continuity shock waves regime (CSW) using computational fluid dynamics (CFD). The application of multiple gas-liquid-solid model requires the knowledge of relationships determining interactions between phases. The exchange coefficients of these forces were defined by means of equations suggested by ATTOU et al. (1999). As a result of the computational simulation the following data were obtained: gas pressure drop in the bed, volume fraction distribution of a given phase (liquid and gas holdups) along the packing and its mean value in the reactor. The comp…

Complexes of Glycolic Acid with Nitrogen Isolated in Argon Matrices. I. Structures and Thermal Effects.

2019

Molecular complexes between glycolic acid and nitrogen were studied in a low-temperature argon matrix with FTIR spectroscopy, and supported by MP2 and BLYPD3 calculations. The calculations indicate 11 and 10 stable complex structures at the MP2 and BLYPD3 levels of theories, respectively. However, only one hydrogen-bonded complex structure involving the most stable SSC conformer of glycolic acid was found experimentally, where the nitrogen molecule is bound with the carboxylic OH group of the SSC conformer. The complex shows a rich site structure variation upon deposition of the matrix in different temperatures and upon annealing experiments, which provide interesting prospects for site-sel…

Systemic vascular resistance predicts the development of hypertension : the cardiovascular risk in young Finns study

2020

To study whether systemic hemodynamics, especially systemic vascular resistance, predicts the development of hypertension and improves the risk prediction of incident hypertension beyond common risk factors in the risk models in young adults. Typical risk factors for hypertension in the risk prediction models (systolic and diastolic blood pressure, parental history of hypertension, age, sex, body-mass index, smoking), laboratory values (high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, triglycerides, glucose, insulin, C-reactive protein), heart rate (HR), stroke index (SI), and systemic vascular resistance index (SVRI) calculated by whole-body impedance cardiography…

Felles mentale modeller i elitelagballspill: En kvalitativ analyse av spilleres opplevelse av medspillerkunnskap i fotball og håndball

2018

Hensikten med denne undersøkelsen er å utforske medspillerkunnskap (team member knowledge) på elitenivå i lagballspill – teoretisk forankret i felles mentale modeller. Medspillerkunnskapen er teamspesifikk og ikke en type kunnskap som spilleren kan transportere med seg fra lag til lag. Eksisterende forskningslitteratur forteller svært lite om spillernes kunnskap om medspillere og betydningen av denne i spillet. Følgende forskningsspørsmål skal derfor belyses: Hvordan beskriver elitespillere sin kjennskap til medspillere? Hvordan opplever spillerne at kunnskap om medspillere utvikles? Undersøkelsen følger et ideografisk forskningsdesign, og det empiriske materialet består av intervjuer med f…