PENGGUNAAN MEDIA DAKON DALAM MENINGKATKAN KETERAMPILAN PEMBAGIAN BILANGAN BULAT

This study aims to improve the learning outcomes of the material division of two-digit integers class 2 MI Miftahul Ulum Kebalankulon by using Media Dakon. The subjects in this study were students of class 2 MI Miftahul Ulum Kebalankulon, totaling 20 students, consisting of 14 students and 6 students. The object in this study is the arithmetic skills and the results of learning mathematics. Data collection methods used in this study were observation and tests with research instruments namely observation sheets and evaluation questions. The data analysis technique used in this research is descriptive qualitative and quantitative descriptive data analysis. The results showed that using the media can increase the math skills and learning outcomes of the material division of integers. In the quality of learning, after the implementation of the first cycle, the teacher's activities in teaching and student participation are in the good category. In the second cycle increased to very good. Improved learning outcomes are shown by increasing the average value of learning outcomes before being given an action that is 62.4 with completeness achieved by 10 students (50.0%), increased in the first cycle with an average test of learning outcomes of 68.7% with completeness achieved by 16 students (80%) in the good category. In the second cycle the average class increased to 82.5 with completeness achieved by 19 students (95%) and in the very good category.

Region Building Complex Social and Economic Security Threats

The basic threats of region building complex social and economic security were investigated. From the standpoint of protective approach established negative factors, which provoke the appearance, threats and significantly reduce the level of region building complex social and economic security. It was found real threats to region building complex economic security. On the basis of multi-material division threats to region building complex economic security were systematized. It was underlined that the proposed division of threats can solve a set of problems in ensuring region building complex economic security.

A Study of the General Method Used in Geotechnical Engineering Numerical Calculating Grid of CAD Graph Cutting

The author, based on the rock mass’ 3D modeling and solid graphics cutting method, advances a from-whole-to-part and from-part-to-whole rock cutting technology, which takes the rock faults and joint fissure of the original rock graphics as the geometric boundary, and takes the rock material division as mechanical control boundary. Being a carrier of grid, each basic rock’s geometry characteristics, topological relations (angle, edge, face, body, etc) and mechanical characteristics (e、μ、c、φ、κ, etc.) are all attached to the rock mass’s graphics. The relationship networks of every block are also stored. Such a collection of orderly and related graphical blocks provides the most basic and general database for all kinds of numerical calculations in geotechnical engineering. It can conveniently generate grid system according to different calculating requirements. After being exercised and examined in several projects, it is proved to have a good application prospect.