4,664 Works

Wood bonding by melting of non-toxic fillers using linear friction welding

Christelle Ganne-Chédeville, Gianluca Tondi, Frédéric Pichelin & Antonio Pizzi
Wood to-wood welding was shown to yield high quality joints with challenging perspectives for producing new environmentally-friendly wooden products. The same welding technique was recently applied to solder wood by melting of non-toxic organic fillers to generate coalescence though softening and recrystallization of the material across the interface. Researchers have been undertaken to clarify the effect of the fillers on the final proprieties of the joints. To this purpose, three types of fillers were tested...

Parameters of wood welding: A study with infrared thermography

Christelle Ganne-Chédeville, Milena Properzi, Antonio Pizzi, Jean-Michel Leban & Frédéric Pichelin
Welding of wood is a well-known joining procedure that offers several advantages over traditional mechanical fasteners or gluing. During welding, extensive solid-state transformation phases occur in the so-called melting zone and the heat-affected zone. The nature and the extension of such transformations are correlated to the energy input and thus to the heat generated during the process at the wood joint interface. In the present work the influence of the welding parameters and wood grain...

Elektromobile machen das Autofahren günstiger

Urs Muntwyler
E-Mobile sind ein Schlüssel zur Dekarbonisierung der Energieversorgung. In Zukunft werden Batterien von Elektroautos auch Energie ins Netz zurückspeisen können.

Viscoelastic behaviour of aged and non-aged spruce wood in the radial direction

Julien Froidevaux, Thomas Volkmer, Christelle Ganne-Chédeville, Joseph Gril & Parviz Navi
The mechanical behaviour of non-aged (modern) and aged spruce [Picea abies (L.) Karst.] wood was investigated in the radial direction using a microtensile testing device. The size of the samples was 5033 mm (radialtangential longitudinal). Elastic, creep, relaxation, rupture and mechanosorption tests were carried out under controlled temperature and relative humidity. Optical and electronic micrographs were produced in order to correlate the mechanical behaviour with the wood structure. Results indicate that the overall mechanical properties...

Wood welding by linear friction: investigations and understanding of the physical and chemical modifications and development of an innovative technology.

Christelle Ganne-Chédeville
Wood welding by linear friction allows bonding of timber in a few seconds without unsing any adhesive. The adhesion is essentially due to the wood fibres entanglements which are embedded in a melted and recured intercellular polymers matrix. But the bonding interphase formation mecanism and the machine parameters and wood substrate influences are not clearly understood. Consenquetly, the goal of this study was to analyse the different factors which are influencing the joint characteristics in...

Le soudage du bois par friction

Antonio Pizzi, Jean-Michel Leban, Christelle Ganne-Chédeville, Milena Properzi, Luc Delmotte & Frédéric Pichelin

Quality assurance and design of timber structures in varying climates

Marcus Jacob Schiere

Experiences and Results with different PEMS

Jan Czerwinski, Yan Zimmerli, Pierre Comte & Th. Buetler

Respiratory hazard assessment of combined exposure to complete gasoline exhaust and respirable volcanic ash in a multicellular human lung model at the air-liquid interface

Ines Tomasek, Claire J. Horwell, Christoph Bisig, David E. Damby, Pierre Comte, Jan Czerwinski, Alke Petri-Fink, Martin J. D. Clift, Barbara Drasler & Barbara Rothen-Ruthishauser

Effects of Gasoline and Ethanol -Gasoline Exhaust Exposure on Human Brochial Epithelial and Natural Killer Cells in Vitro

Michèle Roth, Jakob Usemann, Christoph Bisig, Pierre Comte, Jan Czerwinski, Andreas C.R. Mayer, Konstantin Beier, Barbara Rothen-Rutishauser, Philipp Latzin & Loretta Müller

Nanoparticle Emissions of DI Gasoline Cars with/without GPF

Jan Czerwinski, Pierre Comte, Norbert Heeb, Andreas Mayer & Volker Hensel

The future of interpersonal skills development: Immersive virtual reality training with virtual humans

Marianne Schmid Mast, Emmanuelle P. Kleinlogel, Benjamin Tur & Manuel Bachmann

Studying social interactions through immersive virtual environment technology: virtues, pitfalls, and future challenges

Dario Bombari, Marianne Schmid Mast, Elena Canadas & Manuel Bachmann

Advances in optical fibers fabricated with granulated silica

Jonas Scheuner, Alexander M. Heidt, Sönke Pilz, Philippe Raisin, Ali El Sayed, Hossein Najafi, Manuel Ryser, Thomas Feurer & Valerio Romano

Two-dimensional refractive index profiling of optical fibers by modified refractive near-field technique

A. El Sayed, Sönke Pilz, Manuel Ryser & Valerio Romano

Gas-phase composition and secondary organic aerosol formation from standard and particle filter-retrofitted gasoline direct injection vehicles investigated in a batch and flow reactor

Simone M. Pieber, Nivedita K. Kumar, Felix Klein, Pierre Comte, Deepika Bhattu, Josef Dommen, Emily A. Bruns, Dogushan Kiliç, Imad El Haddad, Keller Keller, Jan Czerwinski, Norbert Heeb, Urs Baltensperger, Jay G. Slowik & André S. H. Prévôt

Numerical study of the influence of picosecond laser spot size on ablated depth and threshold fluence of metal

Yiming Zhang, Benjamin Lauer, Beat Neuenschwander & Valerio Romano

PN-Emissions of Gasoline Cars MPI and Potentials of GPF

Jan Czerwinski, Pierre Comte, Danilo Engelmann, Norbert Heeb, Maria Muñoz, Peter Bonsack, Volker Hensel & Andreas Mayer

Biodiversity-based payments on Swiss alpine pastures

Astrid Mirjam Zabel Von Felten

Arbuscular mycorrhiza effects on Faidherbia albida (Del.) A. Chev. growth under varying soil water and phosphorus levels in Northern Ethiopia

Mengsteab Hailemariam, Emiru Birhane, Girmay Gebresamuel, Abraha Gebrekiros, Yohannes Desta, Alazar Alemayehu, Hintsa Muruts, Tesfay Araya & Lindsey Norgrove
Tree seedling establishment, survival and growth in dryland areas is greatly impacted by water, land use effects and soil nutrient availability. Arbuscular mycorrhizal fungi (AMF) can have a substantial effect on water and nutrient uptake by seedlings and are affected by nutrient application, water availability and inoculum source. In this study, we examined the effect of AMF inoculation, phosphorus application levels, soil water status, and inoculum source on the growth of Faidherbia albida seedlings. Two...

Kundensegmente im Agrotourismus

Andreas Hochuli, Mario Huber & P. Hofstetter
Voraussetzung für eine marktorientierte Ausgestaltung eines touristischen Angebots sind Kenntnisse der Gästebedürfnisse. Mittels einer Clusteranalyse wurden erstmals Gästesegmente (Cluster) aufgrund individueller Bedürfnisse für den Agrotourismus in der Schweiz identifiziert. Die Abgrenzung der sechs Cluster basiert auf einer Befragung von 655 potenziellen Gästen von Agrotourismusbetrieben. Die sechs Gästesegmente weisen vor allem hinsichtlich der Freizeitaktivitäten auf dem Bauernhof und in der Region klare Präferenzen auf. In Bezug auf Übernachtungs- sowie Verpflegungsangebote sind die Unterschiede zwischen den Cluster...

Forstbetriebe Zentraleuropas unter der Lupe

Patric Bürgi, W. Sekot, N. Ermisch, Bernhard Pauli, B. Moehring & P. Toscani

Forstbetriebe: Strukturen und Finanzen

Mélanie Thomas & Patric Bürgi

Aging – Betreuung: Vereinbarkeit von Erwerbsarbeit und Betreuung

Jonathan Bennett, Diana Romano, Thomas Oesch & Felix Kunz

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