Results 21 to 30 of about 2,828,401 (289)

Study on promotion of lean combustion by oxygen enrichment using a rapid compression expansion machine

open access: yesNihon Kikai Gakkai ronbunshu, 2021
While lean combustion in SI engine is one of the promising methods to increase the thermal efficiency and reduce the pollutant emissions, it causes instability of ignition and combustion due to the low burning velocity.
Kazuki HARADA   +5 more
doaj   +1 more source

Aportaciones al conocimiento florístico de la Sierra de Aracena (Huelva, España) [PDF]

open access: yes, 1985
A check list of the Sierra de Aracena (Huelva, Spain) is presented. A total of 900 vascular plants have been identificated.Se ha realizado un catálogo floristico de la Sierra de Aracena (Huelva, España), en el que se citan 900 táxones de plantas ...
Cabezudo, Baltasar, Rivera, J.
core   +4 more sources

Description of the male of Craugastor yucatanensis (Lynch, 1965) (Anura, Craugastoridae), its advertisement call, and additional data on females [PDF]

open access: yesZooKeys, 2019
The male of Craugastor yucatanensis (Lynch, 1965) is described for the first time, as the original description was based on four females. The advertisement call is described and additional morphological data on females are presented. Also, information is
Rubén Alonso Carbajal-Márquez   +5 more
doaj   +3 more sources

The evaluation of the effects of friction in rocking vibration

open access: yesNihon Kikai Gakkai ronbunshu, 2021
In the structures whose bottoms is not fixed such as home appliances and furniture, the falls and the slip movements are caused by vibrations such as earthquakes.
Ryo MIDORIKAWA   +2 more
doaj   +1 more source

Multiobjective stacking sequence optimization for unsymmetric laminated plates under several empirical constraints

open access: yesNihon Kikai Gakkai ronbunshu, 2021
This study proposes a multiobjective stacking sequence optimization method for an unsymmetric laminated plate using for a torsion-box structure of an aircraft wing.
Kentaro HASHIWAKI, Nozomu KOGISO
doaj   +1 more source

Factors of improving fatigue strength in resistance spot welded high-strength steel sheets with tempering treatment

open access: yesNihon Kikai Gakkai ronbunshu, 2021
Fatigue strength of resistance spot welded high-strength steels does not improve with increasing base metal strength. Therefore, cold-working method and tempering treatment have been proposed as methods for improving fatigue strength.
Akira SATO   +5 more
doaj   +1 more source

DEN NYE HISTORIESKRIVNING I 900-TALLET

open access: yesKulturstudier, 2019
Med Liudprand af Cremonas værk Antapodosis blomstrede historieskrivningen op efter en 50-årig stilstandsperiode i det østfrankiske rige. Samtidig skete et skift i den foretrukne historiske genre.
Sigga Engsbro
doaj   +1 more source

Scale effect on mechanical properties of titanium aluminide alloy additively manufactured by electron beam melting

open access: yesNihon Kikai Gakkai ronbunshu, 2021
TiAl (titanium aluminide) has been applied to turbine blades in aerospace industry, because it is a promising lightweight material with high strengths at high temperatures. In recent years, the production method of TiAl by additive manufacturing has been
Kazuhiro GOKAN   +4 more
doaj   +1 more source

Ratification quotas in international agreements [PDF]

open access: yes, 2006
This paper analyses the role of ratification quotas in multilateral agreements over emission reduction. The higher is the quota, the lower is the level of emissions in case the agreement comes into force, but the higher is also the risk of failure.
Kohnz, Simone
core   +2 more sources

Newly-Found Poems in 900 Anthology [PDF]

open access: yesمتن شناسی ادب فارسی, 2013
Nowadays, there is no doubt that any exploration into old Persian poetry will be incomplete without recourse to anthologies and collections of poem. Anthologies are of importance because they keep intact the name and traces of unknown poets and their ...
h Khatamipour, m Sharifi Sohi
doaj  

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