Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram
The research conducted by the researcher is a Meta-Analysis study from the results of research th... more The research conducted by the researcher is a Meta-Analysis study from the results of research that has been carried out by previous researchers to compare the TTW model with the POE model on creative thinking skills and critical thinking in Physics lessons. Researchers studied several journals related to the problems faced, namely as many as 30 National articles indexed by Google Scholar. articles that are the research objectives with the theme of creative thinking models and critical thinking models TTW or POE. Based on this, there are 3 variables, namely (1) the TTW model, (2) the POE model, and (3) the ability to think creatively and critically. From the data analysis using the ANCOVA technique that has been carried out, both models provide an effect size with a large criterion of 0.652. While the influence of the two models can be said to be almost the same, namely the TTW model of 76.58 and the POE model of 74.00 so it can be concluded that the TTW and POE models have a major ...
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety)
The use of rear spoilers on MPV vehicles is often used by the public to get an aerodynamic vehicl... more The use of rear spoilers on MPV vehicles is often used by the public to get an aerodynamic vehicle body design. The understanding of the function of using rear spoiler accessories in the community is still low, so it is necessary to study the characteristics of air flow in aerodynamics. This study aims to determine the flow characteristics of MPV type vehicles with standard and longer rear spoiler installation. This research was conducted in a Subsonic Open Circuit wind tunnel with test section dimensions (365 x 365 x 1250) mm. The flow characteristics were observed experimentally that passed through the model surface resembling the first generation Toyota Avanza MPV with a ratio of 1:20 with variations of the standard and longer rear spoiler installation. Measurement of the flow velocity profile behind the vehicle test model was carried out at an X/L ratio of 0.32 from the leading edge with a speed adjusted to the Reynolds number value of 1.96 x 105. The flow characteristic observe...
Perpustakaan merupakan salah satu sumber informasi dan ilmu yang memiliki kekuatan yang sangat lu... more Perpustakaan merupakan salah satu sumber informasi dan ilmu yang memiliki kekuatan yang sangat luas mencakup berbagai ilmu pengetahuan, teknologi, seni maupun politik. Dalam segi pelayanan kepada pengguna, perpustakaan memiliki keterbatasan, misalnya buku-buku di perpustakaan hanya bisa di pinjam dengan datang langsung keperpustakaan dan dengan jam kunjung yang telah ditentukan.PT Pupuk Sriwidjaja Palembang (Pusri) merupakan salah satu instansi yang memiliki perpustakaan pribadi yang berlokasi di dalam area Pusri yang hanya dikhususkan bagi para karyawan yang bekerja disana. Untuk memenuhi pelayanan yang baik dan efisien terhadap para anggotanya, perpustakaan memerlukan suatu sistem informasi yang dapat membantu para anggota dalam mencari informasi/referensi tentang data-data buku yang diperlukan tanpa harus datang langsung keperpustakaan.Electronic library (e-library) merupakan konsep perpustakaan yang menyediakan koleksi buku, laporan, jurnal maupun koleksi bacaan dalam bentuk digital yang dapat di akses dimanapun dan kapanpun menggunakan akses komputer dan internet. Dengan adanya e-library pegawai PT Pusri dapat mengakses buku-buku ataupun koleksi teks dari PT Pusri tanpa harus datang langsung keperpustakaan. Sistem ini dapat membantu karyawan PT Pusri agar lebih memudahkan karyawan dalam mengakses file e-book dari dalam sistem dengan akun yang telah terdaftar.
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety), 2021
The use of diesel engines in commercial vehicles is still the main choice and the most widely use... more The use of diesel engines in commercial vehicles is still the main choice and the most widely used. The increasing number of commercial vehicles that use diesel engines can pollute the environment and cause noise. In order to reduce exhaust emissions and noise in diesel engines, a particulate filter diesel technology was created which is installed in commercial vehicle diesel engines. This study uses an experimental method. The test was carried out on a Mitsubishi L300 commercial vehicle diesel engine type 4D56 4 cylinder with a cylinder capacity of 2477 cc. The diesel particulate filter technology uses a half honeycomb model made from galvalume plates, with variations in the addition of filters in the form of glass wool of 50 grams, 100 grams, 150 grams, 200 grams, and 250 grams. Testing the exhaust emissions of a diesel engine using a TEN Automotive Equipment Innova 2000 multigas analyzer with a smoketester. Sound noise testing using a sound level meter test tool LT Lutron SL-4001...
We investigate the influence of buoyancy on electroconvection at an ion-exchange membrane in an a... more We investigate the influence of buoyancy on electroconvection at an ion-exchange membrane in an aqueous electrolyte solution. Electrokinetic instabilities (EKIs) and Rayleigh-Bénard (RB) convection are both known to mix the appearing concentration gradient layer and overcome the limiting current arising from diffusional limitations. The different physics, as well as the interplay between them, are investigated by electrical, flow, and concentration characterization. In the buoyancy stable orientation, an EKI mixing layer, having a low concentration, grows till saturated size. In the buoyancy unstable orientation, RB occurs and dominates the advective transport due to the large system size. When current density i < 5i lim , RB mixes the system and EKI does not arise. If i > 5i lim EKI starts before RB and hastens the onset of RB. Upon onset of RB, EKI is suppressed while the overall resistance is still decreased. The onset times of EKI and RB could be predicted using a simple diffusion-migration model based on Fick's second law.
Prisma Sains : Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram
The research conducted by the researcher is a Meta-Analysis study from the results of research th... more The research conducted by the researcher is a Meta-Analysis study from the results of research that has been carried out by previous researchers to compare the TTW model with the POE model on creative thinking skills and critical thinking in Physics lessons. Researchers studied several journals related to the problems faced, namely as many as 30 National articles indexed by Google Scholar. articles that are the research objectives with the theme of creative thinking models and critical thinking models TTW or POE. Based on this, there are 3 variables, namely (1) the TTW model, (2) the POE model, and (3) the ability to think creatively and critically. From the data analysis using the ANCOVA technique that has been carried out, both models provide an effect size with a large criterion of 0.652. While the influence of the two models can be said to be almost the same, namely the TTW model of 76.58 and the POE model of 74.00 so it can be concluded that the TTW and POE models have a major ...
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety)
The use of rear spoilers on MPV vehicles is often used by the public to get an aerodynamic vehicl... more The use of rear spoilers on MPV vehicles is often used by the public to get an aerodynamic vehicle body design. The understanding of the function of using rear spoiler accessories in the community is still low, so it is necessary to study the characteristics of air flow in aerodynamics. This study aims to determine the flow characteristics of MPV type vehicles with standard and longer rear spoiler installation. This research was conducted in a Subsonic Open Circuit wind tunnel with test section dimensions (365 x 365 x 1250) mm. The flow characteristics were observed experimentally that passed through the model surface resembling the first generation Toyota Avanza MPV with a ratio of 1:20 with variations of the standard and longer rear spoiler installation. Measurement of the flow velocity profile behind the vehicle test model was carried out at an X/L ratio of 0.32 from the leading edge with a speed adjusted to the Reynolds number value of 1.96 x 105. The flow characteristic observe...
Perpustakaan merupakan salah satu sumber informasi dan ilmu yang memiliki kekuatan yang sangat lu... more Perpustakaan merupakan salah satu sumber informasi dan ilmu yang memiliki kekuatan yang sangat luas mencakup berbagai ilmu pengetahuan, teknologi, seni maupun politik. Dalam segi pelayanan kepada pengguna, perpustakaan memiliki keterbatasan, misalnya buku-buku di perpustakaan hanya bisa di pinjam dengan datang langsung keperpustakaan dan dengan jam kunjung yang telah ditentukan.PT Pupuk Sriwidjaja Palembang (Pusri) merupakan salah satu instansi yang memiliki perpustakaan pribadi yang berlokasi di dalam area Pusri yang hanya dikhususkan bagi para karyawan yang bekerja disana. Untuk memenuhi pelayanan yang baik dan efisien terhadap para anggotanya, perpustakaan memerlukan suatu sistem informasi yang dapat membantu para anggota dalam mencari informasi/referensi tentang data-data buku yang diperlukan tanpa harus datang langsung keperpustakaan.Electronic library (e-library) merupakan konsep perpustakaan yang menyediakan koleksi buku, laporan, jurnal maupun koleksi bacaan dalam bentuk digital yang dapat di akses dimanapun dan kapanpun menggunakan akses komputer dan internet. Dengan adanya e-library pegawai PT Pusri dapat mengakses buku-buku ataupun koleksi teks dari PT Pusri tanpa harus datang langsung keperpustakaan. Sistem ini dapat membantu karyawan PT Pusri agar lebih memudahkan karyawan dalam mengakses file e-book dari dalam sistem dengan akun yang telah terdaftar.
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety), 2021
The use of diesel engines in commercial vehicles is still the main choice and the most widely use... more The use of diesel engines in commercial vehicles is still the main choice and the most widely used. The increasing number of commercial vehicles that use diesel engines can pollute the environment and cause noise. In order to reduce exhaust emissions and noise in diesel engines, a particulate filter diesel technology was created which is installed in commercial vehicle diesel engines. This study uses an experimental method. The test was carried out on a Mitsubishi L300 commercial vehicle diesel engine type 4D56 4 cylinder with a cylinder capacity of 2477 cc. The diesel particulate filter technology uses a half honeycomb model made from galvalume plates, with variations in the addition of filters in the form of glass wool of 50 grams, 100 grams, 150 grams, 200 grams, and 250 grams. Testing the exhaust emissions of a diesel engine using a TEN Automotive Equipment Innova 2000 multigas analyzer with a smoketester. Sound noise testing using a sound level meter test tool LT Lutron SL-4001...
We investigate the influence of buoyancy on electroconvection at an ion-exchange membrane in an a... more We investigate the influence of buoyancy on electroconvection at an ion-exchange membrane in an aqueous electrolyte solution. Electrokinetic instabilities (EKIs) and Rayleigh-Bénard (RB) convection are both known to mix the appearing concentration gradient layer and overcome the limiting current arising from diffusional limitations. The different physics, as well as the interplay between them, are investigated by electrical, flow, and concentration characterization. In the buoyancy stable orientation, an EKI mixing layer, having a low concentration, grows till saturated size. In the buoyancy unstable orientation, RB occurs and dominates the advective transport due to the large system size. When current density i < 5i lim , RB mixes the system and EKI does not arise. If i > 5i lim EKI starts before RB and hastens the onset of RB. Upon onset of RB, EKI is suppressed while the overall resistance is still decreased. The onset times of EKI and RB could be predicted using a simple diffusion-migration model based on Fick's second law.
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