In this research, our group focused on high school students’ shift of interest in science education and their attitude towards attending college before/after a university-high school collaboration lecture. Lectures given as collaborative programs between university and high schools affected the students’ motivation to study and the tendency to enroll in universities and onto higher education. By having a university lecturer with professional skills teaching in high schools, we verified the impact on students. As a result, by attending the university-high school collaboration lecture, students formally having high interest in science showed higher interest. However, effect on students with relatively low interest stayed low. It revealed that early science education in elementary and junior high school is important for increasing interest in science education. Impact on expanding the high school student’s course choice including the possibility to attend higher education was inferable.
Numerical solution of ordinary differential equations usually applies the fourth order precision Runge-Kutta method, and it is common to find a solution by this finite difference approximation. As for the analytic solutions, many books are published recently. However, there are not so many documents for the numerical solutions. Here, we show some exercises and show the program of the C language. Based on these results, we want to discuss them about some problems and the future prospects.
The mass mortality of Quercus serrata has been progressing in the area of coppice woods of Yokkaichi University. The field survey has been conducted to draw up its measures. The results show the number of individuals of DBH more than 3.0 cm was 321 and the 18.1% of them were dead and those with the perforations of Platypus querciuorus occupied about half of them. The number of dead trees and live ones with the perforation increase in proportion to the increase of DBH. The ratio of dead trees with DBH more than 50cm was as high as 35.7%. The investigation of the age distribution and that for the regenerated individuals by a coppice show more than half of all Q. serrata were under pressure for cropping (DBH>10cm) until late 1980’s, the starting time of construction of the university. This means the age distribution is under the effect of artificial felling as well as the mass mortality caused by P. querciuorus.
Lake Mokeuninuma (45°14′N, 142°16′) is 5 meters above sea level, with a maximum depth of 4.0 meters and mean depth of 3.0 meters. We collected diatom assemblages from plankton and the sediment of Lake Mokeuninuma in August 2017. It contained a total of 54 taxa from 25 genera. The dominant taxa and subdominant taxa were Neidium ampliatum and Pinnularia microstauron.
Cymbella janischii (A. W. F. Schmidt) De Toni and Gomphoneis minuta (Stone) Kociolek & Stoermer collected from the upper Tama River in Oume City, Tokyo, were examined with a scanning electron microscope (SEM). We present 56 pictures here which were taken from various directions as a basis for future research in taxonomy or morphology.
In recent years, amongst the plastics that wash up on coasts, more and more attention has been drawn to 5mm micro plastics (MP) that are wreaking havoc to the marine life by ecological concentration. Until now, tideland areas were considered to be the final destinations of waste materials, but it has been pointed out that there is a possibility of sea tides physically ravaging them, causing the waste to become smaller MP, and turning the coasts into reproduction sites from which MP outflow into the ocean. In this research, we have surveyed the amount of MP found from the coastlines to the shorelines at Takamatsu tidal flat. The result showed that MP was found only amongst the drifting wastes on the shorelines. 2000 were found within a square meter. The MPs were categorized into 7 types. From the MPs gathered, approximately 50% were fertilizer capsules.
Organic materials, such as fertilizers made from food waste and wood waste, are increasingly used in agricultural land. To control the emission of greenhouse gases, such as methane, dinitrogen monoxide and carbon dioxide, as well as water pollutants, to grasp material dynamics in farms is essential. Continuous research on the effect of bamboo powder made from thinned bamboos on soil environment in paddy fields have been conducted. In this study, the authors investigated temporal dynamics of nitrogen, phosphorus, potassium, calcium and magnesium in test columns filled with bamboo powder manured paddy soil. Experimental results revealed the fact that growth of rice affected concentrations of these materials. However, direct effect of bamboo powder on material concentration was not clear.
Abandoned bamboo stands have become problematic nationwide. Due to multiple factors such as disposal costs and shortage of manpower. Solutions to effectively utilize bamboo powder are in the focus of attention. In this study，we investigated whether there is an effective change before and after bamboo powder application in experimental paddy fields in Dogayama district, Yokkaichi City, Mie Prefecture. The effect showed changes in the soil EC, ignition loss and the amount of available phosphorus.