Results 31 to 40 of about 148,619 (281)

On the Mass Fractal Character of Si-Based Structural Networks in Amorphous Polymer Derived Ceramics

open access: yesNanomaterials, 2015
The intermediate-range packing of SiNxC4−x (0 ≤ x ≤ 4) tetrahedra in polysilycarbodiimide and polysilazane-derived amorphous SiCN ceramics is investigated using 29Si spin-lattice relaxation nuclear magnetic resonance (SLR NMR) spectroscopy.
Sabyasachi Sen, Scarlett Widgeon
doaj   +1 more source

How to avoid a compact set [PDF]

open access: yes, 2017
A first-order expansion of the $\mathbb{R}$-vector space structure on $\mathbb{R}$ does not define every compact subset of every $\mathbb{R}^n$ if and only if topological and Hausdorff dimension coincide on all closed definable sets. Equivalently, if $A \
Fornasiero, Antongiulio   +2 more
core   +2 more sources

Experimental and Numerical Studies on Water Cooling Tower Performance [PDF]

open access: yesEngineering and Technology Journal, 2007
Theoretical and experimental studies were conducted on forced draftwater cooling tower. In such towers, the heat and mass transfer take placefrom the hot water to the bulk air, which passes through the tower.
Waheed Mohammad, Jalal Jalil
doaj   +1 more source

Transcendental Julia sets with fractional packing dimension [PDF]

open access: yesConformal Geometry and Dynamics of the American Mathematical Society, 2021
We construct transcendental entire functions whose Julia sets have packing dimension in ( 1 , 2 ) (1,2) . These are the first examples where the computed packing dimension is not 1 1 or 2 2 . Our analysis will allow us further show that the set of packing dimensions
openaire   +3 more sources

Random packing of spheres in Menger sponge

open access: yes, 2013
Random packing of spheres inside fractal collectors of dimension 2 < d < 3 is studied numerically using Random Sequential Adsorption (RSA) algorithm. The paper focuses mainly on the measurement of random packing saturation limit.
Adamczyk Z.   +6 more
core   +1 more source

Classifying Cantor Sets by their Fractal Dimensions [PDF]

open access: yes, 2010
In this article we study Cantor sets defined by monotone sequences, in the sense of Besicovitch and Taylor. We classify these Cantor sets in terms of their h-Hausdorff and h-Packing measures, for the family of dimension functions h, and characterize this
Cabrelli, Carlos A.   +2 more
core   +3 more sources

Quasisymmetric Minimality on Packing Dimension for Homogeneous Perfect Sets

open access: yesAxioms
The quasisymmetric minimality for fractal sets is a hot research topic for scholars focused on the fractal geometry and quasisymmetric mappings. In this paper, we study the quasisymmetric minimality on packing dimension for homogeneous perfect sets.
Shishuang Liu, Yanzhe Li, Jiaojiao Yang
doaj   +1 more source

Π-GISANS: probing lateral structures with a fan shaped beam

open access: yesScientific Reports, 2021
We have performed grazing incidence neutron small angle scattering using a fan shaped incident beam focused along one dimension. This allows significantly reduced counting times for measurements of lateral correlations parallel to an interface or in a ...
Alexei Vorobiev   +3 more
doaj   +1 more source

The Role of Invasive Procedures in the Treatment of Complicated Gastrointestinal Graft‐Versus‐Host Disease in Pediatric Patients

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Gastrointestinal graft‐versus‐host disease (GI GVHD) following hematopoietic stem cell transplant is typically managed with medical therapy, but surgery and angioembolization may be warranted in selected cases with life‐threatening complications.
Gaia Brunetti   +12 more
wiley   +1 more source

Compilation and reliability and validity test of comfort scale for patients after nasal packing

open access: yesHuli yanjiu, 2020
ObjectiveTo develop a comfort scale for patients after nasal packing,and to test its reliability and validity.MethodsKolcaba comfort scale was modified and adjusted according to the characteristics of patients after nasal packing.Seven experts and 210 ...
LI Chenjiao, WANG Binquan
doaj  

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