Ultra-light kirigami lantern chain for superior impact mitigation

2022 ◽  
pp. 101602
Author(s):  
Wen Zhang ◽  
Jun Xu
Keyword(s):  
CIRP Annals ◽  
2021 ◽  
Author(s):  
Chris Yuan ◽  
Huajun Cao ◽  
Kang Shen ◽  
Yelin Deng ◽  
Dan Zeng ◽  
...  

Author(s):  
S. Jin ◽  
L. Deng ◽  
J. Yang ◽  
S. Sun ◽  
D. Ning ◽  
...  

This paper presents a smart passive MR damper with fast-responsive characteristics for impact mitigation. The hybrid powering system of the MR damper, composed of batteries and self-powering component, enables the damping of the MR damper to be negatively proportional to the impact velocity, which is called rate-dependent softening effect. This effect can keep the damping force as the maximum allowable constant force under different impact speed and thus improve the efficiency of the shock energy mitigation. The structure, prototype and working principle of the new MR damper are presented firstly. Then a vibration platform was used to characterize the dynamic property and the self-powering capability of the new MR damper. The impact mitigation performance of the new MR damper was evaluated using a drop hammer and compared with a passive damper. The comparison results demonstrate that the damping force generated by the new MR damper can be constant over a large range of impact velocity while the passive damper cannot. The special characteristics of the new MR damper can improve its energy dissipation efficiency over a wide range of impact speed and keep occupants and mechanical structures safe.


2015 ◽  
Vol 79 (3) ◽  
pp. 1591-1620 ◽  
Author(s):  
Marie Geraldine Herrmann Lunecke

2018 ◽  
Author(s):  
Dale Squires ◽  
Victor Restrepo ◽  
Serge Garcia ◽  
Peter Dutton

This paper considers fisheries bycatch reduction within the least-cost biodiversity impact mitigation hierarchy. It introduces conservatory offsets that are implemented earlier in the biodiversity impact mitigation hierarchy than conventional compensatory offsets used as instruments of last resort. The paper illustrates implementation in an on-going sea turtle conservation programme by the International Seafood Sustainability Foundation.


2021 ◽  
Vol 5 (3) ◽  
pp. 176-183
Author(s):  
Martoyo Martoyo ◽  
Herlan Herlan ◽  
Nahot Tua Parlindungan Sihaloho ◽  
Deni Darmawan

This study aims to analyze the strategy of the Singkawang City Government in restoring the private sector during the COVID-19 pandemic. The research method is descriptive and qualitative, specifically related to the COVID-19 impact mitigation strategy and Singkawang tourism policies. Then analyze the strategic elements of a policy according to the implementation of the O.Jones model. Data was collected by using interviews, observation, and documentation techniques. The data is then analyzed using domain data analysis techniques as a researcher's effort to get a general and comprehensive (holistic) picture of the object under study. The findings in this study are 1) a connected tourism COVID-19 impact mitigation policy strategy from the national to local levels in Singkawang in the form of directives, regulations, COVID-19 mitigation programs, and stimulus for economic recovery in the tourism sector; and 2) there are no visible creative efforts based on health protocols in organizing tourism resources, methods, and unit synergies to restore tourism, interpretation of social media-based policies regarding tourist visits has not been measured, and strategies have not been implemented to meet the opportunities for pandemic trend tourism types with models alternative tourism according to health protocols.


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