全國中小學科展

2024年

NUMERICAL ANALYSIS OF A CANSAT PICOSATELLITE ENERGY CONSUMPTION

This paper describes a power-profile-based approach to CanSat picosatellite energy usage estimation. We measured the power profile of individual CanSat components on a test bench. The collected data was used to create a power consumption model for a simple flight control algorithm. The power consumption model was implemented in Python programming language and was used to simulate the CanSat flight. The simulation results were compared with the measured power profile of a fully integrated CanSat running the same flight control algorithm. The model showed an error of 2.2% and proved to be suitable for use in battery capacity optimization.

新型蘋果果膠修飾技術對氧化鋅氣體感測器性能影響探究

本研究介紹一種創新的氣體感測器技術,利用天然生物性材料蘋果果膠 生物模板,結合水熱法製備氧化鋅奈米結構。此技術的目標是提升感測器對 工業性氣體的響應能力,使其成為出色的感測材料選擇,同時克服現有感測 器技術改性技術所遇到的技術挑戰。經過添加蘋果果膠修飾並進行電性量測 的 ZnO 分析結果表明,此新型氣體感測器在多個關鍵性能方面優於未經修飾的純 ZnO 材料。它表現出對 NO2 更好的響應值恢復曲線、高靈敏度、元件的優良重複性和可逆性。特別在低濃度(ppb)的 NO2 存在下,這種感測器仍然能表現出卓越的性能,這對於市場上通常用來測量較高濃度(ppm)氣體 的感測器具有巨大的優勢。此外,這種感測器還展現出對 NO2 的優異選擇性,這在日常應用中具有極大的重要性,特別是在環境監測方面,能夠準確 地監測大氣中的污染物,以及工廠排放的廢氣,有助於確保人民的空氣品質。

史坦納樹性質探討與優化

本研究主要目的是想要用數學方法解釋與證明史坦納樹。我們想要知道史坦納樹會滿足怎樣的條件,又或者怎樣的條件不會有最短路徑長。因此從最基本的費馬點出發,到正多邊形、任意多邊形,甚至是正多面體,我們討論各種分布的頂點。在文獻探討與程式模擬中,發現史坦納點的邊數等於三且夾角度數等於一百二十度並非巧合。藉由此性質不斷擴展,可證明出在一般情況下史坦納點的個數會等於頂點的個數減二。有了理論的支持,我們嘗試改進五個柏拉圖多面體的史坦納樹,在正八、十二、二十面體都成功優化成更好的結果。另外,我們也證明出正四面體史坦納樹的結果。有了史坦納樹的幫助,我們可以在不影響城市間連通性的情況下,最大化地縮短道路地總長度,因此可將所需成本最小化。史坦納樹的結果可以代表連通圖的最短路徑長,在工程、建築上都將會是重大的突破。

以海源醫材製備新穎有機無機骨組織工程複合支架

膠原蛋白植入人體易降解,在骨組織工程有許多限制,研究用水熱法萃取魚鱗膠原蛋白, 藉GPTMS(3-環氧丙基三甲氧基矽烷)為偶聯劑,交聯四乙基矽酸酯(TEOS)提供的矽網格、魚鱗膠原蛋白、低分子殼聚醣,選擇性添加具黏性多巴胺分子增強機械強度,製備兩種海洋 來源骨組織支架-殼聚醣膠原蛋白複合支架(Collagen Chitosan, CC) 及殼聚醣膠原蛋白多巴胺 複合支架(Collagen Chitosan Dopamine, CCD)。FTIR數據顯示CC支架經GPTMS作用成功產生Si-O-Si基團,CCD樣品中有多巴胺醌化學鍵結產生。NMR結果顯示CC和CCD支架順利開環 反應,證明材料成功合成。SEM可見加入多巴胺會讓CC孔洞變小、多孔結構消失。應力應 變曲線量測結果中知機械性質增強。體外實驗得骨組織支架具良好可控降解性,實驗後一個 月降解40%,支架強度約為人軟骨1/3,無細胞毒性。可嘗試免疫調節劑添加或結合其他生物 相容性材料,擴大骨組織支架應用性。

以磁鄰近誘發非傳統超導

本研究以熱蒸鍍法製作 31 nm Sn 顆粒以及 15% Sn 被 Ni 取代的 38 nm Sn85Ni15 顆粒,探討奈米化及磁鄰近(magnetic proximity)共同引發的非傳統超導行為。分析 X 光繞射譜圖所得電子密度分布,顯示添加 Ni 引發部分內層電子轉移到鍵結區域。磁矩量測顯示 31 nm Sn 在300 K 仍具鐵磁性,而 38 nm Sn85Ni15 的磁矩是 31 nm Sn 的 3 倍之多,指出所添加的 Ni 確實提供較高磁分量,在 Sn 離子鄰近提供一區域磁場,誘發磁鄰近效應。38 nm Sn85Ni15 的超導溫度大幅提升到 7.75 K 為塊材 Sn 超導溫度 3.72K 的 2.1 倍,且外加磁場對弱化超導溫度的效率,在 200 Oe 出現大幅轉折,高於 200 Oe 對超導溫度幾乎沒有影響,出現拒磁及容磁兩種超導行為。這些行為可以用顆粒內層為 s-波(s-wave)超導耦合及外層為非 s 波(non-s-wave) 超導耦合來理解。

Upcycling of Abandoned Beehives!!

Upcycling abandoned beehives to make new products can reuse the useful materials in old beehives and produce less trash. As known that bees leave their beehive in these following situations like insufficient replenishment, frequent unboxing and environmental issues. Then the beehive will be abandoned and will have no use left. In this project, a piece of honeycomb was collected from abandoned beehive and melted in order to extract beeswax. The potential of the extracted beeswax for replacing plastic to produce fillers of 3D pens was studied. Natural materials like seashell, rosin, soy bean and coffee ground were tested as ingredients of 3D printing materials. Finally, the potential of using extracted beeswax in 3D printing was confirmed. Beeswax has a low melting point at around 64°C and solidify quickly at room temperature. The high plasticity of this natural wax fulfills the criteria of 3D printing materials. Biodegradable wastes, like coffee grounds and soy bean grounds were tested as additives for reducing the beeswax content. Sea shell grounds were eliminated from the tested list as its filaments broke into small pieces of brittle fragments during the production process. 5% and 10% of these additives were the optimal formula for making long filaments. Yet, the thin filaments made by pure beeswax were not strong enough, filaments of selected beeswax-soy bean grounds were further strengthened by mixing with 5% or 10% rosin. Among the four different ratios of Beeswax: Soy bean grounds: Rosin (9:1:0.5 / 9:1:1 / 9.5:0.5:0.5 / 9.5:0.5:1), filaments in the ratio 9.5:0.5:0.5 demonstrated better flexibility, higher tensile strength and compressive strength, thus B9.5:S0.5:R0.5 was the final formula of biodegradable beeswax 3D filament.

探討鐵鎳合金催化劑對電解產氫之影響

目前大部分電解產氫反應(HER)均使用貴金屬,如鉑和鈀,作為催化劑。而我們提出了更便宜的 FexNiyP 金屬磷化物用於經濟製氫。在催化劑的製備中採用不同的化學成分(x/y 比例)和合成條件(氧化溫度)。並將合成樣品通過掃描式電子顯微鏡(SEM)、能量色散 X射線光譜(EDS)和 X光繞射儀(XRD)進行了鑑定,以確認其形態、成分和晶體結構。再通過線性掃描伏安法(LSV)測試了它們的 HER催化效率。實驗結果發現,磷化程度強烈影響催化性能,且可以通過合成條件來適當調整,而 250° C是最佳氧化溫度。此外,電化學測試顯示,FeP 啟動反應所需之能量最低,具有最低的過電位(overpotential);而 NiP 反應路徑最佳,具有最低的塔菲爾斜率(Tafel slope)。我們的結果解決了 HER的反應機構,並對氫燃料生產的發展提供了有用信息。

AGRO-GUARD:Machine Learning-Driven Plant Real-Time Disease Detection,Clustering and Community Notifications

Agro-guard aims to revolutionize disease identification and community-based projects in the field of agriculture. Integrating Machine learning, Computer vision, clustering, and community-based technology, this project helped farmers to detect their plant disease with their solution and for early warning of plant disease which was spreading in their community which helped in crop management. The research project is divided into three parts.First,Integrating Machine learning to detect and classify plant disease with their solutions.Second,Integrating Density-Based Spatial Clustering of Applications with Noise (DBSCAN),to identify disease and analyze the pattern within agricultural regions.Third,Establishing notification system to notify real-time alerts to farmers about disease spreading in particular region.The research is crucial because it solve one of the crucial problem of our community which is untimely detection of disease.The finding of the research highlight the effectiveness of Agro-Guard framework in early disease detection and community detection.The machine learning models achieved high accuracy in identifying common plant disease and clustering results the pattern in diseases that were very important for notifying the community.The significance of these findings is that it can build powerful system which will overall grow the production of crops and plants due to timely update of the disease prevailing in the community.It contributes in sustainability production of crops and plants which ultimately ensure the good livelihood of farmer.

Evaluation of the Effect of Different Nutrients' Concentration and Composition on Hydroponically Grown Plant

As the world population grows, the demand of food products grows as well and there will be an expected food crisis in the coming years. To prevent those crises, alternative food farming methods must be used. This paper studied two farming systems in different conditions, to compare and find the best, natural and cost-effective system that will cover the current and future demand. The system which can also be used in those areas where soil is less cultivated with insufficient aeration. The first system is the soil-based system (traditional), and the other is hydroponic system. Hydroponic is a technique of growing plants in nutrient solutions with or without the use of an inert medium. Two types of seeds; peas and spinach were observed in both systems over a period of 25 days. In hydroponic plants coco peat was used in place of soil along with the Aegis nutrient. 8 plants were seeded for both types of plants in different systems, conditions, concentrations and pH to conclude the best condition. Growth parameters of all plants including root, shoot and leaf length were observed and recorded daily. On the uprooting, their weight (g), no. of root hairs and used nutrient’s volume(ml) were also recorded. Fungus and insects were seen in the soil plants. The results executed that the growth was maximum in spinach having normal manufacturer nutrient’s spray concentration(1.25ml/625ml) with pH 6 and in peas having normal supplier concentration (5ml/625ml) with pH 4. So, it can be concluded that hydroponic spinach, which is a green leafy plant, can ideally grow at the pH of 6 and peas in slightly acidic condition. Hydroponic planting system has a better growth effect than traditional soil system and this system don’t need any fertilizer, insecticide, pesticide, fungicide and herbicide. While soil plants’ growth was adversely affected by fungus and insects in the absence of these chemicals which can contaminate our food and make it less hygienic for our health. This result achieves the aim of this paper which is finding a planting system and its conditions that can increase the productivity to cover the food demand.

Non-invasive study of the electrical activity of the brain of various chordate animals

In clinical practice, EEG is used to diagnose a number of neurological diseases and to diagnose epilepsy. But at present, the question of the nature of EEG has not been completely resolved and is of great scientific interest. There have been no studies at all on the non-invasive study of the electrical activity of the brain of the shark superorder, which belongs to the class of cartilaginous fish. By studying the electrical activity of the brain of various gnathostomes, it is possible to obtain an answer to the question of the emergence of rhythms from the point of view of phylogenesis and evolution, and by comparing their EEG with the human EEG, one can identify similar patterns that help in the study of reactions to various influences. During the work, for the first time, EEG indicators of spotted cat sharks, ECG, heart rate and respiratory rate of cat sharks and toads were obtained. In the future, it is planned to assemble a smaller neuroheadset for non-invasive studies of the electrical activity of the brain of small animals (sharks, toads, monitor lizards). This data can be used for evolutionary and medical research. *No animals were harmed during or after the experiments.