On the structure of the (3n+1)/2d(n) iteration problem Part I : Prediction of forward iterations [PDF]
, 2014 48 pages, 18 figuresTo investigate the iteration of the Collatz function, we define an operation between periodic integer series that produce arithmetically subsets of them.
Douady, Stéphane, Manning, Audrey
core +1 more source
Low-impact mating system [PDF]
, 2009 An androgynous mating system for mating two exoatmospheric space modules comprising a first mating assembly capable of mating with a second mating assembly; a second mating assembly structurally identical to said first mating assembly, said first mating ...
Carroll, Monty B. +4 more
core +1 more source
El tercer sector y el espacio público no estatal como nueva forma de gobierno. El caso de las OSC de Puebla, México [PDF]
, 2020 En la actualidad no puede entenderse el fenómeno de gobierno sin hacer alusión a su relación con la sociedad civil; en particular, se plantea la necesidad de la participación ciudadana frente al reconocimiento de la falta del gobierno tanto de recursos ...
Fonseca López, Miriam +3 more
core
Biodiversity of ecosystems in an arid setting: The late Albian plant communities and associated biota from eastern Iberia. [PDF]
PLoS One, 2023 Barrón E +6 more
europepmc +1 more source
Patrones comunes de fracaso y reorganización por sector y país para las PYMEs de seis países europeos utilizando PDFR [PDF]
, 2023 This study contributes to identifying common distress patterns in financial indicators by sector and country in Finland, France, Germany, Italy, Portugal, and Spain as well as ex-post signals of reorganization success.
Castaño, Francisco J. +4 more
core
Analytical flutter investigation of a composite propfan model [PDF]
A theoretical model and an associated computer program for predicting subsonic bending-torsion flutter in propfans are presented. The model is based on two-dimensional unsteady cascade strip theory and three-dimensional steady and unsteady lifting ...
Kaza, K. R. V. +3 more
core +1 more source
Life cycle assessment of the overall energy consumption of a road construction project and its management in Cameroon [PDF]
, 2010 A methodological approach of Life Cycle Assessment is presented in order to compare the energy consumption of three variants of a road tracing in Cameroon.
Ayina Ohandja, L. M. +3 more
core +2 more sources
Noise of a model counterrotation propeller with reduced aft rotor diameter at simulated takeoff/approach conditions (F7/A3) [PDF]
A model high-speed advanced counterrotation propeller, F7/A3, was tested in the NASA Lewis Research Center 9 by 15 foot Anechoic Wind Tunnel at simulated takeoff/approach conditions of 0.2 Mach number.
Gordon, Eliott B., Woodward, Richard P.
core +1 more source
Photovoltaic module electrical termination design requirement study [PDF]
Pertinent electrical termination attributes were identified and used in the development of selection criteria which included function, environmental durability, utility, manufacturing, code, and cost.
Donlinger, J., Mosna, F. J., Jr.
core +1 more source
Unsteady blade pressure measurements on a model counterrotation propeller [PDF]
In an exploratory effort an advanced counterrotation propeller instrumented with blade-mounted pressure transducers was tested in the NASA Lewis 9- by 15-Foot Anechoic Wind Tunnel at a simulated takeoff and landing speed of Mach 0.20. The propeller's aft
Heidelberg, Laurence J. +1 more
core +1 more source