Search results for "SIP"

Korpusonomastinen tutkimus slanginimistä Hesa ja Stadi digitaalisissa diskursseissa

2019

Artikkelissamme selvitämme Helsinkiä tarkoittavien slanginimien, Hesan ja Stadin, käyttöä uudentyyppisen aineiston ja menetelmän avulla. Aiemmissa näitä nimiä koskevissa tutkimuksissa lähtökohta on ollut kvalitatiivinen, mutta tässä tutkimuksessa lähdemme liikkeelle laajasta digitaalisesta aineistosta ja tilastollisista menetelmistä. Tutkimuksemme on uusi avaus nimistöntutkimuksessa, ja nimitämme sitä korpusavusteiseksi nimistöntutkimukseksi, lyhyemmin korpusonomastiikaksi.
 Aineistonamme on laaja Suomi24-keskustelufoorumista muodostettu ja Kielipankista saatava Suomi24-korpus, josta olemme hakeneet Hesa- ja Stadi-nimet. Tutkimus toteutetaan korpusavusteisena diskurssintutkimuksena. Mo…

Jyväskylän yliopiston kampus, Seminaarinmäki : Jyväskylä, Alvar Aalto 1951-1971 & Arto Sipinen 1970-1974

2017

Plant diseases a herald of environmental changes

2011

Environmental changes can alter morphology and physiology of plants, and geographic distribution of both wild and cultural species. All these modifications reflect in plant-associated microflora and development of plant pathogens as well. Climate warming causes a pole-ward shift not only different plants but also their pathogens. Poster in 4th International Conference of Botanic Gardens from the Baltic Sea Region "Botanic gardens network for the development of the Baltic Sea Region", 29 September - 2 October, 2011, Gdansk, Poland

Study of water adsorption and capillary bridge formation for SiO(2) nanoparticle layers by means of a combined in situ FT-IR reflection spectroscopy …

2014

Water adsorption and capillary bridge formation within a layer of SiO2-nanoparticles were studied in situ by means of a combination of quartz crystal microbalance (QCM-D) with dissipation analysis and Fourier transformation infrared reflection absorption spectroscopy (FT-IRRAS). FT-IR data were employed to distinguish the “ice-like” and “liquid-like” contributions and to support the analysis of the QCM-D data concerning mass change and dissipation. Combined measurements show that for SiO2-nanoparticles with a diameter of about 250 nm, the formation of two adsorbed monolayers of water as well as bulk water leads to a rather linear increase in the dissipation for relative humidity values of u…

Energy analysis of a non-linear dynamic impact using FEM

2014

In the car industry, the Finite Element Method (FEM) is being more and more used to analyze the crashworthiness performance of vehicles. In order to validate the results, these impact simulations are normally compared with real crash footage and acceleration data. This paper studies the deformation- and energy output of a simple dummy model during a non-linear dynamic impact. The dummy model is crashed into an obstacle at three different velocities to observe the energy dissipated through different damping mechanisms. Furthermore, in impact simulations, material damping plays an important role in energy dissipation. However, it can be difficult to determine realistic damping parameter value…

Complex power distribution analysis in plates covered with passive constrained layer damping patches

2012

International audience; The vibration of a plate partially covered with a passive constrained layer damping (PCLD) patch is studied from an energetic point of view. The damped plate is excited by an acoustic plane wave. The study is done with a numerical two-dimensional multilayer plate model. Results of the present model are compared to those obtained with three-dimensional finite element models. It is shown that the present model gives accurate results, even for the layer's inner behavior. It is less expansive in terms of computational cost; hence, it can simulate efficiently the structure for higher frequencies. Mathematical formulas for complex mechanical power are presented, and the li…

Dissipative Processes and Their Role in the Evolution of Radio Galaxies

2019

Particle acceleration in relativistic jets to very high energies occurs at the expense of the dissipation of magnetic or kinetic energy. Therefore, understanding the processes that can trigger this dissipation is key to the characterization of the energy budgets and particle acceleration mechanisms at action in active galaxies. Instabilities and entrainment are two obvious candidates to trigger dissipation. On the one hand, supersonic, relativistic flows threaded by helical fields, as expected from the standard formation models of jets in supermassive black-holes, are unstable to a series of magnetohydrodynamical instabilities, such as the Kelvin-Helmholtz, current-driven, or possibly the p…

Host-based divergence in populations of the pea aphid: insights from nuclear markers and the prevalence of facultative symbionts.

2003

In North America, the pea aphid Acyrthosiphon pisum encompasses ecologically and genetically distinct host races that offer an ideal biological system for studies on sympatric speciation. In addition to its obligate symbiont Buchnera, pea aphids harbour several facultative and phylogenetically distant symbionts. We explored the relationships between host races of A. pisum and their symbiotic microbiota to gain insights into the historical process of ecological specialization and symbiotic acquisition in this aphid. We used allozyme and microsatellite markers to analyse the extent of genetic differentiation between populations of A. pisum on pea, alfalfa and clover in France. In parallel, we…

[Transphenoidal endoscopic approaches for pituitary adenomas: a critical review of our experience].

2010

Abstract Background The surgical approach to the pituitary fossae has evolved from transcranial to sublabial and transseptal microscopic ones, up to the current transsphenoidal endoscopic approach. Objectives To present our experience in the transnasal transsphenoidal approach for pituitary adenomas and the modifications introduced to improve tumoral resection and to lower iatrogenia. Material and methods Over nine years, we operated on 37 patients with pituitary adenomas using the transsphenoidal endoscopic approach. We utilised optical lens of 0° (approach) and 30° (adenoma resection), optic navigator, surgical instruments for nasal endoscopic and pituitary surgery. During the neurosurgic…

Role of p16INK4a and BMI-1 in oxidative stress-induced premature senescence in human dental pulp stem cells

2017

Human dental pulp stem cells (hDPSCs) are a source for cell therapy. Before implantation, an in vitro expansion step is necessary, with the inconvenience that hDPSCs undergo senescence following a certain number of passages, loosing their stemness properties. Long-term in vitro culture of hDPSCs at 21% (ambient oxygen tension) compared with 3–6% oxygen tension (physiological oxygen tension) caused an oxidative stress-related premature senescence, as evidenced by increased β-galactosidase activity and increased lysil oxidase expression, which is mediated by p16INK4a pathway. Furthermore, hDPSCs cultured at 21% oxygen tension underwent a downregulation of OCT4, SOX2, KLF4 and c-MYC factors, w…