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Math project:Ants-Killer, the largest overlapping area

Once when we were eating French fries, we started to wonder the possibility of designing the best way to crush the ants attracted by the ketchup. Since then we were devoted to analyzing ¡§the fold line which indicates the largest overlapping area¡¨, or the OFL, in every triangle under different restrictions. For example, we discussed which angle bisector should be chosen. Moreover, we have come to a conclusion that the OFL, among fold lines which paralleled one side, would pass through the centroid.

Chemistry project:Reduction-Oxidation and the Production of Nano Silver

We conducted a study on a new way to produce nano silver. There are many ways to produce nano silver, but some of them take several hours. With our method, it can be done within five to forty minutes. The instruments required for our method include nitrate silver, copper and a little surfactant. We put these materials in an ultrasonic cleaner to vibrate them. In this experiment, the reduction-oxidation reaction was conducted, while surfactant and vibration prevented the particle of nano silver from gathering. We also tried using different kinds of surfactant and changing their volume. We found that the kind of surfactant had a great influence on the result. Next, we studied if temperature can control the generation of nano silver. We found that the answer is yes. We also added acid and magnetic field and observed their effects on the results. We successfully produced yellow and blue nano silver, and through a growth medium experiment, we discovered that they both have good antibacterial effects.

Biology project:Study of Ants Trail

We started the project right after we read an essay on the ¡§Plots one¡¨. Fermat¡¦s principle proved that light rays passing through different media follow the fastest path between two points. Here, we tested whether foraging ants also follow Fermat¡¦s principle when forced to travel on two surfaces that differentially affected the ants¡¦ walking speed. In conclusion, the colony of ants follows the principle and they have tried to revise their trail to reach the principle.

Physics project:Tears Drop

When we were refilling the bottle, we noticed that the frequency we heard had increased. In order to find out the meaning of the frequency, we started our experiment. We made a device by ourselves to simulate the faucet. During the experiment, we turned it on and recorded the sound with a shotgun microphone. Using the professional program, we analyzed the frequency and discovered the relationship between frequency and time. Our ultimate goal is to comprehend the causes of the rising frequency through our experiment.

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Shun Matsumoto

Development of a fuel cell using the sputtering

I conducted a study with the aim to develop a fuel cell at a low cost.

Usually, the electrode for use in a fuel cell is obtained by electroplating the noble metal having a catalytic action. But I tried to create a fuel cell using an electrode made by using a method of sputtering.

As a result, we succeeded in flowing a current in the fuel cell using the nickel electrode. But, in the fuel cell using the carbon sheet electrode, it was impossible to flow a current as much as when using a fuel cell using the nickel electrode.

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