No abstract

Kondisi Tanah Di Kota Payakumbuh khususnya kecamatan Payakumbuh Barat merupakan jenis tanah Lanau. Untuk itu perlu dilakukan perbaikan kondisi tanah agar dapat mendukung terhadap pembangunan infrastruktur di atasnya agar tidak terjadi gagal konstruksi, salah satunya yaitu dengan meningkatkan nilai CBR tanah lanau dengan penambahan ampas tebu. Metode yang digunakan dalam penelitian ini adalah eksperimental yaitu dengan penambahan variasi bahan tambah sebesar 2%, 4%, 6%, dan 8% dari berat tanah kering oven. Hasil penelitinan diperoleh terjadi peningkatan Nilai CBR dengan pencampuran abu ampas tebu pada semua variasi campuran dengan peningkatan terbesar terjadi pada variasi campuran 6% dimana nilai CBR tanah asli sebesar 2,94% meningkat menjadi 7,39%. Namun pada saat penambahan ampas tebu sebesar 8%, nilai CBR tanah Kembali menurun, namun nilai CBR lebih tinggi dari nilai CBR tanah asli. Artinya penambahan ampas tebu meningkatkan nilai CBR asli tanah lanau Kata Kunci: Tanah Lanau, CBR, ampas tebu

The Covid 19 pandemic has had a major influence on the order of human life at this time, including in the world of education. Teachers and educators as essential elements in teaching are required to undertake an unprecedented large-scale migration from traditional face-to-face education to online education or distance education. One of the learning systems used is the e-learning learning system. E-learning is a learning system that is carried out using electronic media. This research was conducted to test user acceptance of the e-learning learning system using the Technology Acceptance Model (TAM). TAM is an analytical model to determine user behavior regarding the acceptance of a technology Testing is done by measuring the influence between variables in the TAM model which includes the variables Perceived Ease of Use, Perceived Usefulness, Attitude Toward Using, Behavioral Intention, and Actual Usage. Testing the influence of factors is carried out using the Structural Equation Model (SEM) - Partial Least Squares (PLS). Evaluation data is obtained from questionnaires distributed to users of the e-learning system. The results show that there is a direct influence between perceived usefulness and perceived ease of use on user behavioral attitudes which have implications for behavioral intentions to use technology (e-learning). This means that users of the e-learning system have the perception that the e-learning system is easy to use so that users can accept the e-learning system and continue to use it in their daily lives Keywords : e-learning, Technology Acceptance Model, Structural Equation Model, Partial Least Squares

A river is a natural channel which conduct water discharge that end up in to the sea. The channel and the morphology of a river would change from time to time caused by human ativities or even by nature. There are two things would occure in the river, erosion and sedimentation. In the river engineering activity, groyne built due to increase the stability of the river bank and to catch the sediment. Bamboo, that part of grass species, grows a lot by the river. The river bank is one of the best habitat for bamboo to grows. This research aims to find out how the bamboo groyne could effect the cross section of Batang Sinamar river, 50 Kota District. This research was carried out by implanted the bamboo groyne by Batang Sinamar  river bank, and the river’s cross section was measured before and after the implantation. The results of the mesurements were analized by using HEC-RAS program application. The results of this study are expected to be solutions for development that is in harmony with nature, and also support the sustainable development.

The topography of the Regency of Fifty Cities which varies between flat, undulating and hilly is one of the factors that can cause foundation failure if there is no proper foundation type planning. The construction of the Ribath As Sa'ady Islamic Boarding School is one of the objectives of the RPJP (Long Term Development Plan) of Fifty Cities Regency, namely DP IV (settlement development area). To assist the government in realizing the RPJP, it is necessary to analyze the carrying capacity of the soil to determine the type of foundation that is suitable so that construction failure does not occur. This study uses the CPT (Cone Penetration Test)/sondir test to obtain the Conus Resistance Value (NK) parameter in Kg/cm2 units, and the amount of adhesive resistance (JHP) in Kg/cm units. The two parameters above are recorded for every 20 cm interval to a depth where the NK value is 160 kg / cm2, with a maximum depth limit of 13.80 m from the local soil surface, the recommended type of foundation is the type of deep foundation (Bore Pile)