Earth-moving machinery. Field of vision of surveillance and rear-view mirrors

Purpose: To describe our experience with a modified frontal muscle advancement flap to treat patients with severe congenital ptosis. Methods: Analysis of the clinical charts of 154 patients who underwent a modified frontal muscle advancement flap. The FM was exposed by a crease incision. The FM flap was created by deep dissection between the orbicularis muscle and orbital septum from the skin crease incision to the supraorbital margin and subcutaneous dissection from the inferior margin of the eyebrow to 0.5 cm above the eyebrow. No vertical incision was made on the FM flap to ensure an intact flap wide enough to cover the entire upper tarsal plate. Contour, symmetry of height, marginal reflex distance (MRD1), and complications were assessed. Mean follow-up was 10 months. Results: The mean patient age was 7.6 ± 5.6 (range, 2–18) years. The mean MRD1 was 3.2 ± 1.3 mm after the operation. All bilateral cases achieved symmetry and optimal lid contour; 17 unilateral cases were under corrected, with a success rate of 89.0%. Complications such as entropion, exposure keratitis, FM paralysis, frontal hypoesthesia, severe haematoma, and entropion were not observed in our series. Conclusion: A modified frontal muscle advancement flap produced a high success rate with a clear field of vision, mild trauma, and few complications. This technique is relatively simple and should be considered for correcting severe congenital ptosis. Date of registration: 29-03-2020 Trial registration number: ChiCTR2000031364 Registration site: http://www.chictr.org/

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DaliNet: Lighter, deeper and larger field of vision

2020 IEEE 92nd Vehicular Technology Conference (VTC2020-Fall) ◽

10.1109/vtc2020-fall49728.2020.9348862 ◽

2020 ◽

Author(s):

Hao Fu ◽

Yuyan Wang ◽

Zhipeng Yang ◽

Jiazheng Fu ◽

Cheng Feng ◽

...

Keyword(s):

Field Of Vision

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Application research of automobile modeling optimization design based on virtual reality technology

Journal of Intelligent & Fuzzy Systems ◽

10.3233/jifs-189806 ◽

2021 ◽

pp. 1-13

Author(s):

Jingfeng Shao ◽

Zhigang Yang

Keyword(s):

Virtual Reality ◽

Optimization Design ◽

Evaluation Process ◽

Design Stage ◽

Virtual Reality Technology ◽

Automobile Design ◽

Field Of Vision ◽

Development Cycle ◽

Design Cycle ◽

Long Time

Automobile styling design is an important part of the design chain. In the traditional automobile modeling evaluation, the process of project evaluation is more in-depth, and designers exchange ideas. Different designers have different evaluations of automobile styling. The evaluation process lasts a long time, which leads to the design cycle being too long and the efficiency of automobile modeling evaluation is greatly reduced. The introduction of virtual reality in automobile modeling evaluation can effectively optimize the evaluation process and promote the rapid adjustment of the model on the basis of development. From the virtual reality system based on mechanical engineering, we only need the parameters of the car model to observe the actual situation through VR technology, and use the measurement tools to directly and accurately evaluate the driver’s field of vision. Through the application of virtual reality technology in the automobile design stage, the interactive and network-based remote research on automobile modeling will also make the automobile design process more convenient, easier to communicate with designers, and reduce the development cycle and cost of automobile design.

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Application of Glass Fiber and Carbon Fiber-Reinforced Thermoplastics in Face Guards

Polymers ◽

10.3390/polym13010018 ◽

2020 ◽

Vol 13 (1) ◽

pp. 18

Author(s):

Takahiro Wada ◽

Hiroshi Churei ◽

Mako Yokose ◽

Naohiko Iwasaki ◽

Hidekazu Takahashi ◽

...

Keyword(s):

Carbon Fiber ◽

Glass Fiber ◽

Impact Testing ◽

Fiber Reinforced ◽

Shock Absorption ◽

Glass Fiber Reinforced ◽

Field Of Vision ◽

Commercial Glass ◽

Carbon Fiber Reinforced ◽

Reinforced Thermoplastics

Face guards (FGs) are protectors that allow for the rapid and safe return of athletes who are to play after sustaining traumatic facial injuries and orbital fractures. Current FGs require significant thickness to achieve sufficient shock absorption abilities. However, their weight and thickness render the FGs uncomfortable and reduce the field of vision of the athlete, thus hindering their performance. Therefore, thin and lightweight FGs are required. We fabricated FGs using commercial glass fiber-reinforced thermoplastic (GFRTP) and carbon fiber-reinforced thermoplastic (CFRTP) resins to achieve these requirements and investigated their shock absorption abilities through impact testing. The results showed that an FG composed of CFRTP is thinner and lighter than a conventional FG and has sufficient shock absorption ability. The fabrication method of an FG comprising CFRTP is similar to the conventional method. FGs composed of commercial FRTPs exhibit adequate shock absorption abilities and are thinner and lower in weight as compared to conventional FGs.

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