English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

An ergonomic seat or bed must be capable of supporting optimally and evenly the user’s body for sustained periods of time. The objective of the performed nvestigations was to ascertain the impact of natural aging on the stiffness of polyurethane foams in dwelling apartment conditions and, additionally, to determine regression equations describing this dependence. Seven types of furniture foams, differing with respect to their apparent density and stiffness, were selected for the experiment. Experimental foams were exposed to aging for the period of 730 days (two years) in climatic conditions typical for dwelling facilities. Foam stiffness was determined in a uniaxial compression test determining strain characteristics in the function of deformations. The performed experiments made it possible to establish percentage changes of stiffness of some foams as well as the time required for those changes to assume a significant character.Ergonomsko sjedalo ili ležaj mora biti sposobno optimalno i ravnomjerno podržavati korisnikovo tijelo dovoljno dugo vrijeme. Cilj provedenih istraživanja bio je utvrditi utjecaj prirodnog starenja na čvrstoću poliuretanske pjene u stambenim uvjetima, a osim toga, i utvrditi regresijske jednadžbe koje opisuju tu ovisnost. Za eksperiment je odabrano sedam vrsta pjene za namještaj različite gustoće i krutosti. Odabrane su pjene izložene starenju u razdoblju od 730 dana (dvije godine), u klimatskim uvjetima tipičnim za zatvorene stambene objekte. Krutost pjena utvrđena je jednoosnim kompresijskim testom određivanja ovisnosti naprezanja o deformaciji. Provedenim je eksperimentom moguće utvrditi postotak promjene krutosti neke pjene, kao i vrijeme potrebno da te promjene postanu značajne

Effects of Aging of Polyurethane Foams in the Context of Furniture Design