The utilization of gypsum board and fly ash waste as alternative materials in making bricks is one of the efforts to reduce the amount of industrial waste in the construction sector, namely gypsum board and fly ash waste. The use of gypsum board and fly ash waste cannot be separated from relatively large amount and the potential to pollute the environment. The pozzolanic properties contained in fly ash combined with gypsum board waste are expected to improve the quality of the bricks. The purpose of this study was to determine the value of the compressive strength of bricks. The method used is an experimental research method in which variations in the composition of gypsum board and fly ash waste are 0% and 0%, 5% and 25%, 7.5%, and 27.5%, and 10% and 30% of the weight, respectively. cement using a sample size of 37 x 10 x 15 cm. Based on the results of the study, it showed that the compressive strength test of the gypsum board and fly ash waste bricks had met the quality requirements according to SNI 03-0349-1989 with the average compressive strength value for each composition of 42.37 Kg/cm2, 73.04 Kg/cm2, 49.30 Kg/cm2, and 43.59 Kg/cm2.

The train is a mode of mass transportation that is fast, efficient, and relatively affordable. To support the high demand for this mode of transportation, adequate infrastructure is also needed. The condition of this infrastructure must always be monitored so that the level of security and safety of rail transportation modes can always be in optimal conditions. One important component that requires regular attention and maintenance is the railway sleepers. In this paper, a finite element (FE) model was made of railway sleepers using ANSYS software. From the analysis on the FE model, it can be explored that the deformation and stress that occurs in the railway due to loading. In this study, vibration tests were also carried out on railway based on several types of passing trains. It aims to determine the frequency value based on the type of passing train. This research is the initial stage of a series of studies on structural health monitoring procedures on railroads.

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Indonesia, as a tropical region, shows high potential for rainfall. At highlands, enormous rainfall triggers both soil and coastal erosion. Landslides are frequently occured in Semarang in which some of whose areas are indicated as highlands with unstable soil. This study was carried out in DeliksariSukerejo, Gunungpati sub-district of Semarang. Various effort have been done to prevent the disaster such as socialization of preventing landslide given by government, private institutions, colleges, and non-governmental organizations. However, most of those method only involve for the adults, involving of the children in effort to understandthe disaster mitigation concept are less. One of the effort used was FHP (Funny Hand Puppet) Story Telling. This method tried to draw childrens attention by handy-puppets shows, so the the purpose which is hoped could be well-transferred. As many as 24 children attended this shows. From the pre-test, it was gained 84.3% of those who did not know simple ways to avert the landslide. After the socialization had been given, post-test results showed 94.8% of the children significantly understood the danger of landslide. From the results depicted the increasing of landslide awareness as 10.5%. All respondent were children between 4-13 years old.This method provided broader education about landslide happening in their surroundings. Indonesia sebagai negara tropis memiliki potensi curah hujan yang tinggi. Pada daerah perbukitan, curah hujan yang tinggi merupakan faktor pemicu terjadinya longsoran baik pada tanah maupun batuan. Bencana longsor juga sering terjadi di kota Semarang yang sebagian wilayahnya perbukitan dengan kondisi tanah yang tidak stabil. Dilaksanakan penelitian yaitu di kawasan Dukuh Deliksari, Kelurahan Sukorejo, Kecamatan Gunungpati Semarang. Berbagai upaya telah dilakukan dalam pencegahan bencana tersebut, misalnya sosialisasi pencegahan bencana longsor yang dilakukan oleh pemerintah, swasta, perguruan tinggi, dan LSM. Kebanyakan upaya tersebut hanya melibatkan orang dewasa, sehingga anak-anak belum memiliki pemahaman sejak dini mengenai lingkungan tempat tinggal mereka yang rawan longsor. Salah satu metode yang digunakan adalah FHP (Funny Hand Puppet) Story Telling. Metode ini mencoba menarik perhatian anak-anak dengan menggunakan boneka tangan yang ditujukan kepada anak-anak sehingga pesan yang dibawa dapat tersampaikan dengan baik. Sebanyak 24 anak-anak yang mengikuti metode ini didapatkan dari hasil pre test 84,3% belum mengetahui cara sederhana menangani bencana longsor. Hasil dari post testmenunjukkan bahwa 94,8% anak-anak menjadi lebih paham. Dengan hasil tersebut anak-anak mengalami peningkatan sebesar 10,5%. Melalui metode ini, sesungguhnya anak-anak mendapatkan pendidikan yang jauh lebih luas tentang bencana longsor yang benar-benar terjadi di tempat mereka tinggal.