Sex pheromone blends of large black chafer, Holotrichia parallela (Motschulasky), which consist of a major component L-isoleucine methyl ester (LIME) and a minor component (R)-(-)-linalool, showed different attractiveness depending on the mixing ratios of the two components in potato fields in South Korea. The best ratio for H. parallela attraction was 2.5:1 of LIME and (R)-(-)-linalool. The attraction ability of pheromone traps bated with 2.5:1 ratio did not drop up to 14m, but significantly decreased at 21m from H. parallela release point. Korean population of H. parallela showed almost same periodical activity to sex pheromone with that reported in Japan, which showing a circabidian periodicity of 48h cycle.

Malaysian secondary school teachers' readiness to use Information Communication Technology (ICT) is considered a critical skill in terms of national goals for schools that will prepare students to compete in the knowledge economy of the 21st century. The study investigated 303 teachers' ICT readiness in terms of their basic ICT knowledge, skills, and attitudes towards ICT. Data were collected via the Teachers' ICT Readiness instrument which consisted of an ICT knowledge test, an ICT skills test, and attitude towards ICT questionnaire. The results indicated that the majority of teachers had a moderate level of basic ICT knowledge and skills. A majority of the teachers too had a positive attitude towards ICT. Discussion and recommendations focus on the need to capitalize on the positive attitudes to turn these into action, increasing readiness to use ICT.

Due to the increasing use that the stainless steel is getting recently in the nuclear industry, this document proposes the study of the stainless steel 316L with boron addition. With the final product, the properties of the stainless steel 316L (good mechanical properties and high corrosion resistance) with the boron neutron absorption properties are claimed to unify. The P/M technologies allow adding higher boron quantities than with the solidification conventional technologies, where segregation is produced.

The effect of the additives, and MgO, on the sintering and properties of composites was investigated. It is known that MgO is used as additive for improving densification and is applied as sintering aid. In this study, the amounts of TiC were varied in the range of 30-47 wt%. The 0.5 wt% MgO and also varied amounts of from 0.3 to 1 wt% were added into the composites. The sintering of composites was performed in a graphite-heating element furnace at different sintering temperature, 1700 and , for 2 hr under an argon atmosphere. The results demonstrated that the properties of the composites sintered at were much better than those sintered at . The comparisons on physical properties, mechanical properties and microstructure of composites with and without additives were reported. Comparing with other samples, composites with 0.5wt% MgO and exhibited the highest density of approximately 98% of theoretical and flexural strength of 302 MPa.

A connection between pulse-periodical laser radiation power and stability of liquid-metal contacts between powder particles during selective laser sintering (SLS) is determined based on analysis solving the problem of stability of liquid column in the gravity and capillary forces field. On the grounds of obtained relationships the optimization of pulse-periodical laser radiation power and SLS-process duration is realized, that allows to produce voluminous powder porous materials with pre-determined physical and mechanical properties and surface geometry. Results of metallographic investigations of powder porous materials of titanium powder produced with technological regimes calculated by means of obtained relationships are given in the work

Magnetic oxide-coated iron nanoparticles with the mean size ranging from 6 to 75 nm were synthesized by aerosol method using iron carbonyl as a precursor under the flowing inert gas atmosphere. Oxide shells were formed by passivation of asprepared iron particles. The influence of experimental parameters on the nanoparticles' microstructure, phase composition and growth behavior as well as magnetic properties were investigated and discussed in this study.