Results 51 to 60 of about 325,035 (334)

Properties of non-FCC hard-sphere solids predicted by density functional theory

open access: yes, 2006
The free energies of the FCC, BCC, HCP and Simple Cubic phases for hard spheres are calculated as a function of density using the Fundamental Measure Theory models of Rosenfeld et al (PRE 55, 4245 (1997)), Tarazona (PRL 84, 694 (2001)) and Roth et al (J.
Lutsko, James F.
core   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Impact Measurement on Apple and Orange Packinghouses Using a Wireless Instrumented Sphere

open access: yesChemical Engineering Transactions, 2015
Physical damage can be considered one of the main causes of postharvest losses for fruits and vegetables. One of the challenges is to measure the impact magnitude on packing lines.
Y. Roa   +5 more
doaj   +1 more source

Network topology drives population temporal variability in experimental habitat networks

open access: yesPopulation Ecology, EarlyView.
Habitat patches connected by dispersal pathways form habitat networks. We explored how network topology affects population outcomes in laboratory experiments using a model species (Daphnia carinata). Central habitat nodes in complex lattice networks exhibited lower temporal variability in population sizes, suggesting they support more stable ...
Yiwen Xu   +3 more
wiley   +1 more source

Jamming by compressing a system of granular crosses

open access: yesEPJ Web of Conferences, 2017
A disordered stress-free granular packing can be jammed, transformed into a mechanically rigid structure, by increasing the density of particles or by applying shear deformation.
Zheng Hu   +3 more
doaj   +1 more source

Measurement and Evaluation of Potential Ergonomic Hazards in the Packing Area of PT Tirta Investama Klaten Factory [PDF]

open access: yesSHS Web of Conferences
PT Tirta Investama Klaten Factory is a company that produces bottled drinking water. Most production activities use machines, but there are still activities carried out manually, namely in the packing area during box lifting activities.
Elsa Dwi Rahmawati   +2 more
doaj   +1 more source

Geographic variation in walking activity in the red flour beetle Tribolium castaneum

open access: yesPopulation Ecology, EarlyView.
This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley   +1 more source

Force network ensemble: a new approach to static granular matter [PDF]

open access: yes, 2004
An ensemble approach for force distributions in static granular packings is developed. This framework is based on the separation of packing and force scales, together with an a-priori flat measure in the force phase space under the constraints that the ...
J. Brujic   +9 more
core   +4 more sources

occumb: An R package for site occupancy modeling of eDNA metabarcoding data

open access: yesPopulation Ecology, EarlyView.
This study introduces a new R package, occumb, for the convenient application of site occupancy modeling using environmental DNA (eDNA) metabarcoding data. We outline a data analysis workflow, including data setup, model fitting, model assessment, and comparison of potential study settings based on model predictions, all of which can be performed using
Keiichi Fukaya, Yuta Hasebe
wiley   +1 more source

Smart Pack: Online Autonomous Object-Packing System Using RGB-D Sensor Data

open access: yesSensors, 2020
This paper proposes a novel online object-packing system which can measure the dimensions of every incoming object and calculate its desired position in a given container.
Young-Dae Hong   +2 more
doaj   +1 more source

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