Conservation principles in solitary impulse propagation through granular chains

2002 ◽  
Vol 315 (1-2) ◽  
pp. 194-202 ◽  
Author(s):  
David T Wu
2020 ◽  
pp. 121-124
Author(s):  
Surajit Sen ◽  
Marian Manciu ◽  
Felicia S. Manciu ◽  
Alan J. Hurd

2000 ◽  
Vol 627 ◽  
Author(s):  
Surajit Sen ◽  
Marian Manciu ◽  
Victoria Tehan ◽  
Alan J. Hurd

ABSTRACTThe study of sound propagation in granular beds at frequencies exceeding a MHz has been a subject of study for many years. Much remains to be learnt about sound propagation at lower frequencies. We shall present our studies on the problem of impulse propagation and briefly comment on low frequency acoustic propagation in model granular beds using particle dynamical simulations. The following results will be briefly discussed. (i) Impulses propagating as solitary waves in 1-D granular chains with Hertz contacts in the absence of precompression. (ii) The effects of uniform precompression and gravitational loading on wave propagation. (iii) Impulse propagation in 3-D granular beds. The research presented shall highlight the intrinsically nonlinear nature of wave propagation in granular beds.


2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Yun Hye Hwang ◽  
Anuj Jain

Abstract Urban landscapes have the potential to conserve wildlife. Despite increasing recognition of this potential, there are few collaborative efforts to integrate ecology and conservation principles into context-dependent, spatial and actionable design strategies. To address this issue and to encourage multi-disciplinary research on urban human–wildlife interactions, we ask the following questions. To what extent should design and planning actions be aligned with urban ecology in the context of a compact city? How can wildlife conservation meet the seemingly conflictual demands of urban development and public preference? To answer these questions, we refer to the relevant literature and a number of design projects. Using the compact tropical city of Singapore as a case study, we propose 12 design strategies. We encourage designers and planners to strengthen the links between wildlife and urban dwellers and promote wildlife conservation within cities.


2015 ◽  
Vol 419 ◽  
pp. 457-463 ◽  
Author(s):  
PingPing Wen ◽  
Guan Wang ◽  
Degan Hao ◽  
Ning Zheng ◽  
Liangsheng Li ◽  
...  
Keyword(s):  

1998 ◽  
Vol 62 (10) ◽  
pp. 760-764 ◽  
Author(s):  
Yoshinori Kobayashi ◽  
Yasushi Miyauchi ◽  
Naomi Kawaguchi ◽  
Kazuko Ohmura ◽  
Hirokazu Saitoh ◽  
...  

2018 ◽  
Vol 735 ◽  
pp. 1-37 ◽  
Author(s):  
Alexandre Rosas ◽  
Katja Lindenberg

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