Exploration of acoustical and dynamical properties of organic nanoparticle assemblies for increased sound insulation

2018 ◽  
Vol 143 (3) ◽  
pp. 1713-1713
Author(s):  
Mathew A. Whitney ◽  
Ning Xiang ◽  
Sadeq Malakooti ◽  
Habel G. Churu ◽  
Nicholas Leventis ◽  
...  
Keyword(s):  
Sound Insulation ◽  
Nanoparticle Assemblies ◽  
Dynamical Properties

Correlating dynamical properties of organic aerogel with increased sound insulation of sandwich wallboard systems

2018 ◽  
Vol 144 (3) ◽  
pp. 1754-1754
Author(s):  
Ning Xiang ◽  
Mathew A. Whitney ◽  
Sadeq Malakooti ◽  
Habel G. Churu ◽  
Nicholas Leventis ◽  
...  
Keyword(s):  
Sound Insulation ◽  
Dynamical Properties ◽  
Organic Aerogel

From the Oort cloud to Halley-type comets

1999 ◽  
Vol 173 ◽  
pp. 327-338 ◽  
Author(s):  
J.A. Fernández ◽  
T. Gallardo
Keyword(s):  
Total Population ◽  
Complex Function ◽  
Dynamical Evolution ◽  
Oort Cloud ◽  
Capture Process ◽  
Influx Rate ◽  
Short Period ◽  
Dynamical Properties ◽  
Orbital Periods ◽  
Probability Of Capture

AbstractThe Oort cloud probably is the source of Halley-type (HT) comets and perhaps of some Jupiter-family (JF) comets. The process of capture of Oort cloud comets into HT comets by planetary perturbations and its efficiency are very important problems in comet ary dynamics. A small fraction of comets coming from the Oort cloud − of about 10−2− are found to become HT comets (orbital periods < 200 yr). The steady-state population of HT comets is a complex function of the influx rate of new comets, the probability of capture and their physical lifetimes. From the discovery rate of active HT comets, their total population can be estimated to be of a few hundreds for perihelion distancesq <2 AU. Randomly-oriented LP comets captured into short-period orbits (orbital periods < 20 yr) show dynamical properties that do not match the observed properties of JF comets, in particular the distribution of their orbital inclinations, so Oort cloud comets can be ruled out as a suitable source for most JF comets. The scope of this presentation is to review the capture process of new comets into HT and short-period orbits, including the possibility that some of them may become sungrazers during their dynamical evolution.

Dynamical properties of highly entangled polyalkylmethacrylate solutions : A comparative study

2000 ◽  
Vol 10 (PR7) ◽  
pp. Pr7-321-Pr7-324
Author(s):  
V. Villari ◽  
A. Faraone, ◽  
S. Magazù, ◽  
G. Maisano ◽  
R. Ponterio
Keyword(s):  
Comparative Study ◽  
Dynamical Properties

Pseudo-Anosov Theory

2017 ◽  
Author(s):  
Benson Farb ◽  
Dan Margalit
Keyword(s):  
Braid Groups ◽  
Intersection Numbers ◽  
Branched Covers ◽  
Algebraic Integers ◽  
Dehn Twists ◽  
Mapping Classes ◽  
Dynamical Properties

This chapter focuses on the construction as well as the algebraic and dynamical properties of pseudo-Anosov homeomorphisms. It first presents five different constructions of pseudo-Anosov mapping classes: branched covers, constructions via Dehn twists, homological criterion, Kra's construction, and a construction for braid groups. It then proves a few fundamental facts concerning stretch factors of pseudo-Anosov homeomorphisms, focusing on the theorem that pseudo-Anosov stretch factors are algebraic integers. It also considers the spectrum of pseudo-Anosov stretch factors, along with the special properties of those measured foliations that are the stable (or unstable) foliations of some pseudo-Anosov homeomorphism. Finally, it describes the orbits of a pseudo-Anosov homeomorphism as well as lengths of curves and intersection numbers under iteration.

Sound Insulation of Sandwich Panels with Additional Claddings

2020 ◽  
pp. 8-13
Author(s):  
V.N. BOBYLEV ◽  
◽  
P.A. GREBNEV ◽  
V.I. EROFEEV ◽  
D.V. MONICH ◽  
...  
Keyword(s):  
Sandwich Panels ◽  
Sound Insulation

Influence of the Flexible Plate with a Space Structure on the Sound Insulation Improvement

2020 ◽  
pp. 14-18
Author(s):  
N.A. KOCHKIN ◽  
◽  
I.L. SHUBIN ◽  
A.A. KOCHKIN ◽  
◽  
...  
Keyword(s):  
Space Structure ◽  
Sound Insulation ◽  
Flexible Plate
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