Age-Related Study and Collision Response of Material Properties of Long Bones in Chinese Pedestrian Lower Limbs

Round 1

Reviewer 1 Report

Questions 1: It is better to open a brief discussion on eq.s 1.2.3.4

Equations: using the empirical formula, it is better to explain in detail the range of validity  

Questions 2: I think it is important to introduce also younger people

I think young people are also involved in car accidents. I. e. % of total pedestrian accidents 

Author Response

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Reviewer 2 Report

Dear Authors,

The study design is well developed, indeed the sample is well selected and recruited

The methodology is well developed and structured, although the English should be slightly improved. There are some errors and shortcomings.

Although this, considering the above, the manuscript is suitable for publication in Applied Science.

Author Response

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Author Response File: Author Response.docx

Reviewer 3 Report

To the author(s),

 

The paper deals with “Age-related study and collision response of material properties of long bones in Chinese pedestrian lower limbs”.

The topic is of high importance in forensic sciences’ applications. Therefore, the paper will sure guide professionals in the field. It also has potential to contribute related criminal cases.

A parametric simulation study has been carried out with seven age groups and five speed points, which means 35 groups of simulations. The collision response of the long bones of the lower limbs of pedestrians at different ages has been compared.

·         The design of research and the manner of presentation are appropriate

·         Abstract is detailed and presents paper in whole.

·         Introduction section is explanatory and provide fair amount of information for readers. It provides sufficient background and include all relevant references.

·         Materials and Methods is well-organized and comprise “human body lower limb model”, “Geometric extraction and material assignment of long bones of lower limbs”, “Simulation matrix of age sensitivity analysis”, and “Data analysis” as subtopics. The methods adequately described. Therefore, this section is the strongest link of well-organized project.

·         Results section is detailed and well-organized. The results clearly presented and is understandable with tables and charts.

·         Discussion section covers all issues to be addressed and added value to the paper.

·         All the cited references are relevant to the research

·         The conclusions are supported by the results. Actually, the statement of “The results showed that the increase in age was negatively correlated with the decrease in the material properties of each long bone. Moreover, with the increase of age, the tolerance limit of long bones gradually decreases, but there will be a limit, and there is no obvious positive correlation with age. During a standing side impact, the stress change of the femur was significantly smaller than that of the tibia, and the stress of the femur and tibia decreased with age. Age is a more significant influencing factor for lower limb injuries. Older pedestrians have a higher risk of lower limb injuries.” was an expected conclusion. However, the paper provides a model for assessment the effect of age as a core variable.

There is no need for any correction or changes.

Sincerely,

Author Response

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Author Response File: Author Response.docx