COVID-19 pandemic impacts on vocational education. Lectures that were originally conducted face-to-face learning are diverted to online learning to avoid the spread of the pandemic. Online learning is very difficult to apply for courses conducted in the laboratory. This study discusses vocational students’ responses to the practice of online learning during the COVID-19 pandemic. Data were collected through a questionnaire created on Google form consisting of 20 questions. The questionnaire used a Likert scale to find out the attitudes and students’ perceptions of the implementation of online learning. The number of research respondents was 107 people consisting of 45 respondents from the West Aceh State Community Academy and 62 respondents from Lhokseumawe State Polytechnic, Aceh, Indonesia. The results of this study found that 59.81% of students disagree with online learning. The results also showed a score of 76.95% of the students agree that internet access is the main obstacle in online learning. However, students’ satisfaction with the current online learning system for students shows a score of 67.50%. Opinions related to online learning from 107 respondents showed that 45.42% of them less agree if online learning is still applied when the COVID-19 pandemic ends.

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Indonesian seas have not been used as a source of electricity yet. One of the potential and abundant sources of energy from the sea is ocean waves. This study describes the measurement of the wave characteristics and calculates its spatial and temporal energy in Pari Island which can be utilized as electrical energy using overtopping ocean wave power plants scheme. The energy that can be harvested from ocean waves is calculated by wave energy converter using the Wave Dragon WEC. This converter is the terminator type. Sea waves on the Pari Island are classified as the smooth sea with 0.16-0.51 meters significant wave height and 2–4 seconds period. The calculated WEC can produce energy up to 28 Mega Joules and power up to 6 Mega Watts. Based on this calculation, Wave Dragon which is an overtopping WEC is able to meet the electricity needs on Pari Island with two options, The first one is using 35 units of WD 1 on the Pari Island Coast with a 500 m distance from the settlement, or the second one is using 6 units of WD 2 which is located in the northeast region of Pari Island waters with 18 Km distance from the settlement of Pari Island.

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Bangli solar power plant has 5004 solar modules and uses concrete foundations to support those modules. Due to the location of this power plant was a former landfill, after 5 years in operation, 121 foundations have dropped to lower level. The soil under foundation is not enough to support modules sufficiently. In this paper, a new design has been proposed to correct this problem. The first step is to test the carrying capacity of soil through Sondir boring. Using Standard Penetration Test (SPT) obtained that the layer of hard soil is located at a depth of -10m from the original soil surface with type of soil layer above the elevation of hard soil in the form of silt soil. Using a palm foundation, carrying capacity of a foundation with a width of less than 1.2 meters and a depth of foundation of 1 meter. This makes the average carrying capacity is only 0.39 - 1.20 kg/square cm or the value is too small for foundation of solar power plants. The proposed foundation is a 50 x 50 cm palm foundation that is laid on a geotextile bed. The area of the geotextile depends on the area of decreased foundation.