[en] A class of three-generation superstring model with Z₃ R-symmetry is investigated. Three different definitions of matter-parity are considered in the investigation. It is found that only two models can provide phenomenologically interesting results: all but the known quarks are superheavy; there is one and only one pair of light Higgs doublets; a proton does not decay fast; renormalization group equation analysis gives sin²θ_W≅0.23-0.25; and two or three additional light lepton doublets and charged singles are predicted to have mass ≅10³ GeV. (orig.)

[en] Presented is a method to form a crowded vertical PN junction in the surface layer of a solar cell by ion implantation. After the processing the distance from the light-generated carrier to the PN junction is shortened and the collection efficiency of the cell is improved. A new type anti-irradiation solar cell has been developed

[en] In this paper, we present a view point that the reduction of bounded nucleon radius naturally explains the EMC effect. Some discussion is given at the end of the paper concerning the prevalent explanations about the EMC effect

[en] The Feynman rules in the center-of-mass bag model are given. The scaling violation of the nucleon structure functions thus obtained and the EMC effect are explained through the dependence of the effective bag radius anti R on Q² and mass number A. It is shown that the experimental curves can be well fitted if anti R decreases with the increase of either Q² or A. (orig.)

[en] The oxidative degradation of aqueous carbofuran, a heavily used toxic carbamate insecticide by low temperature plasma, was investigated. The results show that the treatment efficiency increases with the increase in initial concentration. Raising the treatment temperature and changing the pH value can result in enhanced degradation of carbofuran in solution. The results also show that low temperature plasma treatment can effectively remove chemical oxygen demand (COD) of carbofuran in the solution.