|学科||材料科学 Materials Science|
The Flash Shade: Directional Darkening Technology
lt is always unpleasant and dangerous to be blinded by glaring light, whether from the setting sun or bright arc welding flashes. As conventional darkening methods provide an inadequate solution, the aim was to develop a new technology for smart sunglasses. This technology would automatically and selectively darken only bright light sources so that the wearer receives a view in which all incident light rays are homogenously adjusted to a pleasant brightness. This was achieved through an intricate combination of semi-transparent organic solar cells and liquid crystal shutters, for which the respective characteristic curves (i.e. luminance, transmission, and voltage) were analyzed in a self-made solar simulator. The most promising substances for a symbiotic combination were identified amongst multiple electrochromic and photoelectric materials. These were integrated into a specifically designed honey-comb like structure, that imperceptibly sectorizes the wearer's view. A CAD program was used to rapid-prototype the design. The functionality was then proven on a large-scale prototype. A strong degree of darkening was observed for outdoor luminance (1400lx-7000lx, Transmission: 0.46%), a medium degree for 150lx-1400lx (Transmission: 2.47%) and a minor degree for indoor luminance (0lx-150lx, Transmission: 13.8%). The determined reaction speed was at ~67ms (the eyelid closure reflex requires 250ms). The results clearly show a luminance controlled darkening effect. A microcontroller could deliberately be omitted for the appliance to be mobile and lightweight. The fast reaction speed further proves its importance for light intense conditions (ie. welding or laser safety). This solution is, therefore, a viable option to existing sunglass technologies.
高中生科研 英特尔 Intel ISEF
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高中生科研竞赛 英特尔 Intel ISEF 简介
英特尔国际科学与工程大奖赛，简称 "ISEF"，由美国 Society for Science and the Public（科学和公共服务协会）主办，英特尔公司冠名赞助，是全球规模最大、等级最高的中学生的科研科创赛事。ISEF 的竞赛学科包括了所有数学、自然科学、工程的全部领域和部分社会科学。ISEF 素有全球青少年科学竞赛的“世界杯”之美誉，旨在鼓励学生团队协作，开拓创新，长期专一深入地研究自己感兴趣的课题。
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学科简介：材料科学 Materials Science
The study of the integration of various materials forms in systems, devices, and components that rely on their unique and specific properties. It involves their synthesis and processing in the form of nanoparticles, nanofibers, and nanolayered structures, to coatings and laminates, to bulk monolithic, single-/poly-crystalline, glassy, soft/hard solid, composite, and cellular structures. It also involves measurements of various properties and characterization of the structure across length scales, in addition to multi-scale modeling and computations for process-structure and structure-property correlations.
Biomaterials (BIM): Studies involving any matter, surface, or construct that interacts with biological systems. Such materials are often used and/or adapted for a medical application, and thus comprise whole or part of a living structure or biomedical device which performs, augments, or replaces a natural function.
Ceramic and Glasses (CER): Studies involving materials composed of ceramic and glass – often defined as all solid materials except metals and their alloys that are made by the high-temperature processing of inorganic raw materials.
Composite Materials (CMP): Studies that integrate multiple materials such as ceramics, fiber, metals or polymers to create a superior and unique material.
Computation and Theory (COM): Studies that develop and apply theoretical methods and/or use computer modeling to design new materials, predict material behavior under differing environmental conditions, understand energy transfer, etc.
Electronic, Optical and Magnetic Materials (ELE): The study and development of materials used to form highly complex systems, such as integrated electronic circuits, optoelectronic devices, and magnetic and optical mass storage media. The various materials, with precisely controlled properties, perform numerous functions, including the acquisition, processing, transmission, storage, and display of information.
Nanomaterials (NAN): The study and development of nanoscale materials; materials with structural features (particle size or grain size, for example) of at least one dimension in the range 1-100 nm.
Polymers (POL): The study and development of polymers; materials that have a molecular structure consisting chiefly or entirely of a large number of similar units bonded together, e.g., many synthetic organic materials used as plastics and resins.
Other (OTH): Studies that cannot be assigned to one of the above subcategories. If the project involves multiple subcategories, the principal subcategory should be chosen instead of Other.