The study examines the influence of learning management systems to the implementation of flipped classroom model in a vocational school in Indonesia. The flipped classroom is relatively new educational model that inverts students' time to study on lectures and time spent on homework. Despite studies have been conducted on the model, few addressed the impact of the use of a learning management system to the performance of students involved in such learning model particularly within Indonesian educational systems context. A quasiexperiment approach was applied to an experiment class and another control class. Upon the analysis, the results emphasized previously held research outcomes. The use of Edmodo learning management systems enhances students' performance in the experiment class, relative to those of the control class.
ABSTRAKSektor konstruksi diketahui memberikan dampak cukup besar bagi lingkungan. Sektor konstruksi berkontribusi menghasilkan emisi gas karbon lebih dari 40%, menggunakan material dari alam yang jumlahnya cukup besar, menyumbangkan limbah, serta mengurangi daerah untuk resapan air dan area hijau. Atas dasar inilah dalam kerangka pembangunan berkelanjutan, para praktisi di dunia konstruksi terus didorong untuk menerapkan konsep green building. Saat ini keberadaan green building di Indonesia masih sangat sedikit, sehingga konsep dan pemahaman konsep green building di Indonesia masih harus terus disosialisasikan dan didorong penerapannya. Penelitian ini bermaksud mengeksplorasi penerapan konsep green building pada gedung Bank Indonesia (BI) Surakarta. Tujuannya adalah untuk mengidentifikasi latar belakang dan proses penerapan konsep green building pada gedung tersebut, serta mengetahui pandangan dan peran dari dari pihak-pihak yang terlibat dalam proses perencanaan, pembangunan serta penggunaannya. Metode penelitian dilakukan dengan pendekatan kombinasi metode kuantitatif dan kualitatif dari owner, konsultan perencana, kontraktor dan pengguna gedung. Untuk memastikan kualitas data yang dikumpulkan, dilakukan triangulasi teknik pengumpulan data meliputi observasi, wawancara mendalam, kuesioner dan studi dokumentasi. Penentuan sampel sumber data dilakukan secara purposive. Analisis data kualitatif dilakukan melalui proses data reduction, data display, dan verification. Hasil penelitian menunjukkan komitmen yang kuat dari owner sebagai pioneer dalam mewujudkan bangunan yang ramah lingkungan dan hemat energi sebagai alasan utama penerapan konsep green building pada Gedung BI Surakarta. Aplikasi green building yang diterapkan meliputi: penggunaan solar panel sebagai sumber energi alternatif, penggunaan kaca low-e sebagai pencahayaan alami, memanfatkan air limbah untuk di daur ulang, ruang terbuka hijau yang maksimal, adanya reflecting pool, penggunaan peralatan mekanikal-elektrikal yang hemat energi, terdapat parkir sepeda dan shower compartement, terdapat BAS (Building Automation System), perlengkapan sanitary yang ramah lingkungan, serta lingkungan kerja yang sehat dan nyaman. Owner, kontraktor dan pengguna gedung memiliki persepsi positif dan peran serta yang cukup besar dalam mewujudkan green building. Meskipun kontraktor memiliki persepsi yang positif namun dalam proses konstruksi terdapat beberapa hal yang dirasakan menjadi beban kontraktor antara lain proses konstruksi dan proses administrasi yang lebih rumit, serta timbulnya biaya-biaya ekstra yang harus ditanggung kontraktor. Pemerintah diharapkan dapat memberikan berbagai insentif yang mendorong penerapan konsep green building.Kata kunci: green building, gedung Bank Indonesia, Surakarta PENDAHULUANPembangunan sangat berpengaruh terhadap kelestarian dan kualitas lingkungan karena menggunakan berbagai jenis sumber daya alam. Eksploitasi sumber daya alam yang tidak memperhatikan kemampuan dan daya dukung lingkungan dapat mengakibatkan merosotnya kualitas lingkun...
This paper describes the effect of rice husk ash on the fresh properties, density, and compressive strength of fly ash-based self compacting geopolymer concrete (SCGC). Fresh properties were tested by the slump flow test. Density and compressive strength were tested with cylindrical concrete samples. Diameters of samples were about 150 mm and 300 mm high. The variations of Rice Husk Ash (RHA) as Fly Ash (FA) substitution were 0%, 5%, 10%, and 15%. The alkaline activators used Na2SiO3 and NaOH with ratio at 1.0 and a molarity value of NaOH was fixed at 14 M. The water-binder ratio was fixed at 0.3. The dosage of superplasticizer used 1%. The treatment of concrete used ambient temperature. The test results showed that rice husk ash decreased the slump flow; was not affected on the concrete density; and increased the compressive strength of SCGC. The maximum percentage of rice husk ash substitution to achieve the EFNARC slump flow standard was 7.16%. The density of the SCGC was 2076.4 kg / m3 – 2104.3 kg / m3, and classified to the normal concrete. The maximum compressive strength of SCGC was 11.476 MPa at the percentage of rice husk ash substitution about 8.65%.
Pada mata pelajaran produktif, terdapat materi yang membahas konsep dasar Wide Area Network sehingga peserta didik mampu menghubungkan sebuah perangkat ke jaringan luar. Sebagian peserta didik belum termotivasi mempelajari konsep dasar Wide Area Network sehingga hasil belajar tidak memuaskan. Mengatasi permasalahan tersebut diperlukan upaya untuk meningkatkan hasil belajar dan motivasi belajar peserta didik yaitu dengan penggunaan model Blended Learning selama kegiatan belajar mengajar. Model Blended Learning merupakan model pembelajaran yang memanfaatkan teknologi internet yaitu e-learning yang digabungkan dengan model pembelajaran tatap muka. Penelitian ini menggunakan strategi Think Pair Share sebagai model tatap muka dan Google Classroom sebagai e-learning. Penelitian ini menggunakan metode quasi experimental design dengan model nonequivalent control group design. Data dikumpulkan dengan pretest dan posttest, serta instrument motivasi belajar. Berdasarkan analisis menggunakan uji t, terdapat perbedaan hasil belajar dan motivasi belajar antara pembelajaran model Blended Learning dengan strategi Think Pair Share berbantuan Google Classroom dan Traditional Learning. Sedangkan dari analisis uji gain, model Blended Learning dengan strategi Think Pair Share berbantuan Google Classroom lebih tinggi daripada model Traditional Learning dalam meningkatkan hasil belajar.
Concrete is a material that is needed for building construction or others is increasing. Construction increased as cement use increased. The continued use of cement will cause environmental damage, cement is the 8th largest source of carbon gas emissions in the world. One of the revolutionary developments using environmentally friendly materials as a substitute for cement is geopolymer concrete. Alternative materials rich in silica and alumina for the manufacture of geopolymer concrete, namely adding rice husk ash (RHA), fly ash, silica fume, glass powder, as substitute for cement. A cement substitute can use RHA as partial substitute for geopolymer concrete based on fly ash, which is rich in silica and alumina. For the binder, an activator is needed, the activator itself usually uses NaOH and Na2SiO3. The purpose of this study was to determine the effect of rice husk ash as a partial substitution of fly ash on split tensile strength and porosity of geopolymer concrete and determine the optimum percentage of use of RHA to produce tensile strength and porosity in geopolymer concrete with material calculations using EFNARC 2005. Geopolymer concrete which binders using 14M NaOH and Na2SiO3, and binders namely Fly ash and rice husk ash, with variations for RHA 0%, 5%, 10%, 15%. Sample in the form of cylinder with diameter of 150 mm and height of 300 mm for tensile strength and cylinder with diameter of 2 inches and height of 5 mm for porosity. The specimens were treated for 28 days with room temperature curing. From the data obtained, it can be concluded that there is an effect of RHA to increase tensile strength and reduce porosity in geopolymer concrete with an optimum variation of 10%, with an optimum tensile strength of 1.061 MPa, and minimum porosity of 13.13%.
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