A horizontally symmetric all-metallic vibration isolator (AM-VI) is proposed to further investigate the dynamic mechanical performance. The novel AM-VI was constructed by combining hat-shaped metal rubber and oblique springs, which were connected in parallel. springs arranged symmetrically relative support. elliptic method frequency sweeping used compare stiffness loss factor of AM-VI. results ...

BACKGROUND Animal transmission studies can provide important insights into host, viral and environmental factors affecting transmission of viruses including influenza A. The basic unit of analysis in typical animal transmission experiments is the presence or absence of transmission from an infectious animal to a susceptible animal. In studies comparing two groups (e.g. two host genetic variants...

North American triple reassortant swine (TRS) influenza A viruses have caused sporadic human infections since 2005, but human-to-human transmission has not been documented. These viruses have six gene segments (PB2, PB1, PA, HA, NP, and NS) closely related to those of the 2009 H1N1 pandemic viruses. Therefore, understanding of these viruses' pathogenicity and transmissibility may help to identi...

Series elastic actuators (SEAs) have had sound contributions in the robotics field, and significant breakthroughs been achieved. Despite this fact, there are still drawbacks to their performance. The spring, which provides compliance, limits SEA’s performance by lowering bandwidth of force/torque generation, decreases even further when SEA has render large torques. This problem originates from ...

The average age of humans at their first infection with Plasmodium falciparum is typically less than 1 year in most endemic areas. This has been interpreted as evidence of the high transmissibility of the parasite, with the implication that control of malaria will require high levels of coverage with a potential vaccine. This interpretation is challenged by mathematical models that demonstrate ...

Malaria, a vector borne disease, is one of the most important major global public health challenges. In this paper we develop a deterministic mathematical model for malaria, which considers the effects on malaria prevalence of the chronological age of human hosts and the role of natural acquired immunity (NAI) of people continuously exposed to the parasite. We identify the basic reproduction nu...

Contact lens induced ulcerative keratitis is a serious complication which can be devastating for the patient if treatment is delayed. Extended wear is the commonest cause of microbial keratitis in contact lens wear. New extended wear silicone hydrogel contact lenses have higher oxygen transmissibility so that they can be worn continuously for 30 days. They can also be used as bandage contact le...

This study investigates the use of a spring-bar mechanism (SBM) in vibration suppression system to improve its performance. The SBM, comprising bars and springs, is configured with conventional linear spring-damper isolator unit. dynamic response, force transmissibility, energy flow behaviour are studied evaluate performance integrated system. It found that SBM can introduce hardening, softenin...

This study evaluates the vibration isolation performance of an adaptive magnetorheological elastomer (MRE)-based dynamic absorber (MRE-DVA) for mitigating high frequency vibrations (100–250 Hz) target devices. A simple and effective MRE-DVA design was presented its experimentally measured. cylindrical shaped MRE pad configured to be operated in shear mode also worked as a semi-actively tunable ...