Development of UV-Protection Roofing Tile from Nitrogen-doped Graphene Quantum Dots (N-GQDs) for Rubber Drying Chambers
Improved methods of processing latex into rubber sheets will improve the incomes of small rubber producers. There are two ways in which latex can be processed into rubber sheets: fumigation and solar incubation. The fumigation method is expensive and produces pollution, but solar incubation can cause dark, sticky rubber sheets due to UV radiation, which reduces their value. A low-cost and environmentally-friendly solution to this problem was investigated here. A UV-protective roofing panel made using Nitrogen-doped Graphene Quantum Dots (NGQDs) was developed and tested. N-GQDs were made using the hydrothermal process for 2 and 4 hours (T2 and T4) and the solvothermal process for 4, 6, and 8 hours (TS4, TS6, and TS8). It was found that all types of N-GQDs absorbed light in the UV range, withT4 showing the greatest absorption. T4 had the greatest Fluorescent Intensity (FL) value, emitting blue light, while for the solvothermal method TS6 had the highest FL value, emitting red light. T4 and TS6 were chosen for further testing, and were applied to a clear roofing tile. After installing the roof on the chamber, the temperature inside was higher than outside. Then we measure the UV protection efficiency of the roof which was 93.27%. The average temperature was 45℃, which is the temperature for drying rubber sheets. Due to the roof’s capability to absorb UV radiation and heat the chamber, our N-GQDs roof has a great ability to produce higher-quality rubber sheets.
探討多子連線的最小阻隔數
2021年國際科展中,有作品探討鉛直與水平排列的支配數,而本研究從五子棋的想法出發,將前述研究進行重要的延伸與改變,探討在a×b棋盤中,「米」字方向無p子連線時,所需的阻隔數最小值。由於有界棋盤比無界棋盤複雜許多,因此我們先在無界棋盤中找出符合阻隔限制的「完美型態」,並找出存在至少一種「完美型態」的p值集合Ω。研究發現,只要是可以表示為p=6k-1或p=6k+1(k∈N)的正整數p,皆可以型態DT(p,d)阻隔。接著我們推廣至有界棋盤,先探討所有p值的f(a,b;p)上界與下界,再針對Ω中的p值做討論,利用「任意1×p區域至少有1個阻隔」的性質導出「完美型態」下長或寬為kp(k∈N)的下界,並找出非常接近f(a,b;p)的上界。我們也將二維的探討方式與結果延伸至三維,找出所有p值的f(a,b,c;p)上下界與可使阻隔型態DT(p,d_R,d_h)為完美型態的p值集合。另外我們也找出嚴格對角拉丁方陣可對應成「完美型態」之必要條件。
Study of regenerative and ontogenetic processes under the influence of EHF EMR.
The increased sensitivity of aquatic organisms to the effects of EMF has been proven by numerous experimental studies. It has been repeatedly noted that exposure to EMF of certain frequencies and intensities leads to disruption of physiological functions, orientation in time and space, changes in the behavior of organisms, suppression of motor activity. Other ranges of electromagnetic radiation, on the contrary, can cause the effects of increased regeneration, growth rate and survival. In connection with these trends, the purpose of our research is to analyze the effects of the influence of electromagnetic radiation of extremely high frequency on the development of the Xenopus laevis and the regeneration of newts and planarians