Results 21 to 30 of about 970,728 (295)

An annotated checklist of the lichen biodiversity at two Mars analog sites: The Mars Desert Research Station (Utah, USA) and The Flashline Mars Arctic Research Station (Nunavut, Canada) recorded during the Mars 160 Mission [PDF]

open access: yesCheck List
During the Mars 160 Mission in 2016 and 2017, crews at the Mars Desert Research Station (MDRS) in Utah, USA and the Flashline Mars Arctic Research Station (FMARS) on Tallurutit (Devon Island), Nunavut, Canada, conducted a collections‑based ...
Paul C. Sokoloff   +9 more
doaj   +3 more sources

Geometry of normal graphs in Euclidean space and applications to the Penrose inequality in Minkowski [PDF]

open access: yes, 2013
The Penrose inequality in Minkowski is a geometric inequality relating the total outer null expansion and the area of closed, connected and spacelike codimension-two surfaces S in the Minkowski spacetime, subject to an additional convexity assumption. In
Mars, Marc, Soria, Alberto
core   +1 more source

Slowly rotating charged fluid balls and their matching to an exterior domain [PDF]

open access: yes, 2002
The slow-rotation approximation of Hartle is developed to a setting where a charged rotating fluid is present. The linearized Einstein-Maxwell equations are solved on the background of the Reissner-Nordstrom space-time in the exterior electrovacuum ...
A. García   +10 more
core   +2 more sources

Edge-detection applied to moving sand dunes on Mars [PDF]

open access: yes, 2013
Here we discuss the application of an edge detection filter, the Sobel filter of GIMP, to the recently discovered motion of some sand dunes on Mars. The filter allows a good comparison of an image HiRISE of 2007 and an image of 1999 recorded by the Mars ...
Sparavigna, Amelia Carolina
core   +2 more sources

The mechanism of pyridine hydrogenolysis on molybdenum-containing catalysts : IV. The conversion of piperidine [PDF]

open access: yes, 1973
The conversion of piperidine was investigated on a CoO-MoO3-Al2O3 catalysts as a function of the temperature, reaction time, initial piperidine partial pressure and the hydrogen pressure.\ud \ud At 60 atm of hydrogen and conversions below 50% piperidine ...
Mars, P., Neyens, W.J., Sonnemans, J.
core   +2 more sources

Genetic Parameters and the Impact of Off-Types for Theobroma cacao L. in a Breeding Program in Brazil

open access: yesFrontiers in Plant Science, 2017
Breeding programs of cacao (Theobroma cacao L.) trees share the many challenges of breeding long-living perennial crops, and genetic progress is further constrained by both the limited understanding of the inheritance of complex traits and the prevalence
Ashley DuVal   +9 more
doaj   +1 more source

Introduction to TIPS: a theory for creative design [PDF]

open access: yes, 1995
A highly intriguing problem in combining artificial intelligence and engineering design is automation of the creative and innovative phases of the design process.
Mars, N.J.I.   +2 more
core   +4 more sources

The influence of the precipitation rate on the properties of porous chromia [PDF]

open access: yes, 1975
The properties were studied of heated (320°C) chromia samples, prepared by two precipitation methods: \ud \ud 1. (1) addition of ammonia to chromium salt solutions,\ud 2.
Keijzer, H. de, Mars, P., Sonnemans, J.
core   +2 more sources

On the use of text augmentation for stance and fake news detection

open access: yesJournal of Information and Telecommunication, 2023
Data Augmentation (DA) aims at synthesizing new training instances by applying transformations to available ones. DA has several well-known benefits such as: (i) increasing generalization ability; (ii) preventing data scarcity; and (iii) helping resolve ...
Ilhem Salah   +2 more
doaj   +1 more source

Identification of Climate and Genetic Factors That Control Fat Content and Fatty Acid Composition of Theobroma cacao L. Beans

open access: yesFrontiers in Plant Science, 2019
The main ingredients of chocolate are usually cocoa powder, cocoa butter, and sugar. Both the powder and the butter are extracted from the beans of the cacao tree (Theobroma cacao L.).
Guiliana M. Mustiga   +12 more
doaj   +1 more source

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