The problems of learning physics have experienced increasingly complex obstacles amid the demands of online learning due to the COVID-19 pandemic. The purpose of this study is to explain the basic physics learning process through an online system during a pandemic, by evaluating the Self-Regulated Learning (SRL) approach to Problem-solving Skills (PSS). Data were collected through distributing questionnaires, interviews and documentation studies, then analyzed. This study shows that the applied SRL has been implemented well, but has not been optimal in improving PSS in online Basic Physics learning. The unpreparedness of technological devices and the competence of educators and students become obstacles that result in difficulties in solving physics problems so that the expected results are not following the expected learning targets. Also, this study shows the difficulty of learning physics online during the pandemic. Thus, a responsive physics learning model is needed with conditions that allow the delivery of physics material to be well understood, even though it is delivered through digital media. This is a demand that needs the attention of all parties so that the achievement of online learning targets remains optimal and effective in increasing the problem-solving skills of students during the COVID-19 pandemic.
Science, technology, engineering, arts, and mathematics (STEAM) have been applied in various countries because they have been able to answer the challenges of the globalization era. The implementation of STEAM at school has demanded that teachers have a role in making a relationship between disciplines in science contained in STEAM. The purpose of this research was to describe the perceptions of experienced teachers about math-focused STEAM learning. The research was a descriptive study on 14 vocational high school mathematics teachers in Malang, Indonesia. They had 20-30 years of teaching experience. Data were collected using essay questionnaires. The result showed that their perceptions of STEAM learning were positive. However, they also said that there were several obstacles to math-focused STEAM learning. The first obstacle was the unavailability of supporting literature. The second obstacle was that there were teachers who have no received training. The third obstacle was only a limited number of mathematics material that can be applied in STEAM learning. Additionally, the teacher stated that mathematics was more suitable as supporting contain in STEAM learning than as the primary focus.
This research describing the role of the mother that very central in assisting children’s learning activities through the concept of mentoring that focuses on the uniqueness of each individual. This concept is termed a Learning- Centered Individuals who see uniquely child has potential, interests and dy- namics of each problem, so that the practical assistance should be focused on managing the potential and uniqueness of each individual dynamics prob- lems to deliver the right learning attitude, without forgetting the reaching academic achievement.<br /><br />Keywords: Ibu, pendampingan, belajar, Individual Learning-Centered
ABSTRAK: Salah satu alternatif dalam mendukung ketersediaan sumber daya energi terbarukan adalah dengan memanfaatkan sumber dari non fosil seperti bioetanol. Bioetanol merupakan etanol yang dibuat dari biomass yang mengandung komponen pati (karbohidrat) atau selulosa yang selanjutnya di fermentasi menggunakan bantuan mikroorganisme (Sacharomyces cerevisiae). Karbohidrat yang digunakan pada penelitian ini berasal dari Lemna minor (Duckweed). Penelitian ini bertujuan membuat bioetanol dari Lemna minor dengan variasi penambahan ragi dan lamanya waktu fermentasi. Kemudian bioetanol ini ditentukan kadar etanol dan densitasnya serta mengetahui hubungan antara keduanya. Produksi bioetanol telah dilakukan melalui proses konversi karbohidrat menjadi gula (glukosa) dengan hidrolisis asam (HCl).Hidrolisat yang diperoleh selanjutnya dilakukan fermentasi dengan menambahkan yeast atau ragi sehingga diperoleh bioetanol. Variabel yang digunakan adalah perubahan massa ragi 5%,15%, dan 25% serta lama fermentasi 5, 6, dan 7 hari . Hasil penelitian menunjukkan lama fermentasi dan persentase ragi mempengaruhi kadar etanol. Nilai kadar etanol optimum diperoleh presentase ragi 25% dengan lama fermentasi 7 hari sebesar 3.81% dengan density optimum sebesar 0.9438 gr/cm 3, Hubungan nilai densitas berbanding terbalik dengan peningkatan kadar etanol.Kata kunci: Persentase ragi; waktu fermentasi; Lemna minor. ABSTRACT:One alternative in favor of the availability of renewable energy resources is to utilize non-fossil sources such as bioethanol. Bioethanol is ethanol made from biomass component containing starch (carbohydrate) or cellulose. Furthermer it is fermented using microorganisms (Sacharomyces cerevisiae). In this study Lemna minor (Duckweed) was used to produce carbohydrates . This study aims is to make bioethanol from Lemna Minor with percentage of yeast and length of fermentation time in variation. It is then determined the ethanol value, density and the relation between them. Bioethanol production was conducted through the process of converting carbohydrates into sugar (glucose) by acid hydrolysis (HCl). Hydrolysates were then fermented by adding yeast to obtain bioethanol. The used variables were yeast mass 5%, 15%, and 25% and fermentation time 5, 6, and 7 days. The results pointed out that the percentage of yeast and fermentation time affect the levels of ethanol. The optimum ethanol value obtained by 25% ethanol with 7 days fermentation lenght was 3.81%. While optimum density was 0.9438 g / cm 3. The relation between ethanol value and density are inversely proportional.
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