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Carment: Magnesium Cement From Glass Waste As A Solution To The Cement Industry's Carbon Emission Problems
Get PDFIn dealing with carbon emissions generated from the cement industry in general, the author has the idea to use Carment. Carment is a concept of carbon absorbing cement based on magnesium silicate which is derived from silica and is able to reduce carbon emissions from the manufacturing process compared to the manufacture of cement in general. There are several solutions that have existed in overcoming the problem of carbon emissions from the cement industry, such as the Waste Heat Recovery Power Generator (WHRPG), reducing the clinker ratio through blended cement products, and using alternative fuels to replace coal. However, its existence is still quite expensive and has not been able to overcome the problem of carbon emissions resulting from the cement industry. Carment is an innovation in the industrial sector where Carment as a magnesium cement from glass waste can solve the problem of carbon emissions from the calcination process. The availability of glass waste, which has a high availability, contains more than 70% silica and is inexpensive, increases the potential to produce magnesium cement from glass waste in Indonesia
THE ADAPTATION PATTERN IN LANDED RENTAL HOUSES: A CASE STUDY OF GRESIK INDUSTRIAL AREA
Get PDFContracted houses, or landed rental houses, were developed spontaneously by homeowners as the cheapest alternative for renting houses with flexible contracts. Therefore, landed rental homes are not designed to suit the needs of tenants, and several variations will occur in landed rental homes as a form of adjustment for the owner. Adaptation is significant in the process of building a house. However, given the limited time context in rental housing, the adaptation process is interesting to study more deeply. Gresik is a developing district, and the large number of industries in Gresik has triggered many migrants, most of whom are industrial workers and rent houses on site. This study identifies the adjustment of semi-fixed features and analyzes the adaptation pattern in three types of landed rental houses—40, 50, and 60 m2—using the descriptive-qualitative method. The techniques used here are in-depth interviews, on-the-spot sketches, and observations. From the research that has been done, it was found that each type of landed rental houses has their own adaptation pattern. Generality pattern was found in all the three types, while the flexibility pattern was found in the second and third types
“KAMPUNG VERTICAL” DESIGN IN URBAN VILLAGE AS URBAN RENEWAL STRATEGY (CASE STUDY: GANDEKAN VILLAGE, SEMARANG)
Get PDFUrbanization or the movement of people from villages to cities has caused many problems, both socio-economic, environment, and illegal housing which is carelessly constructed due to the increasing need for housing. To overcome this situation, urban renewal can be an effective solution. This urban renewal focuses on the presence of vertical housing as a realignment of the residential housing design for community. It focuses on the presence of a space that protects the environment, the health of residents, and accommodatesthe activities of its community. Vertical villages are familiarin Indonesia, especially in urban village areas that were shabby. Therefore, this research purposed for the designing of a vertical village in Gandekan Village area of Semarang. Due to the growth of the population and the increasingly advanced of Semarang City, many villagers moved in to obtain a more decent job, but problems were also arising in this phenomenon
Prediksi Jumlah Penumpang Kereta Api Stasiun Surabaya Gubeng dengan Metode Monte Carlo
Get PDFJumlah penumpang kereta api di Indonesia kembali mengalami peningkatan semenjak masa pandemi. Salah satu stasiun yang mengalami peningkatan penumpang adalah Stasiun Surabaya Gubeng. Penelitian ini bertujuan untuk mendapatkan hasil prediksi jumlah penumpang harian kereta api di Stasiun Surabaya Gubeng menggunakan metode Monte Carlo dengan pembangkit bilangan acak yang berbeda. Metode Monte Carlo merupakan metode yang menginterpretasikan hasil ketidakpastian probabilitas dari suatu proses dan menyimulasikan nilai frekuensi secara stokastik dari segala kemungkinan hasil. Pembangkit bilangan acak yang digunakan yaitu; multiplicative, mixed, dan random uniform. Tingkat keakuratan dari hasil penelitian dihitung berdasarkan nilai Mean Absolute Percentage Error (MAPE). Data dalam penelitian ini merupakan data time series diambil dari tanggal 16 Mei 2022 hingga 2 Oktober 2022 sebanyak 140 hari. Data dibagi menjadi tujuh kelompok berdasarkan nama hari sebanyak 20 data untuk setiap kelompok. Prediksi dilakukan menggunakan Monte Carlo diperoleh rata-rata nilai MAPE outsample dari setiap kelompok hari yaitu; hari Senin sebesar 25,25%, hari Selasa sebesar 16,74%, hari Rabu sebesar 17,73%, hari Kamis sebesar 3,32%, hari Jumat sebesar 12,36%, hari Sabtu sebesar 4,88%, dan hari Minggu sebesar 2,62%. Kesimpulan akhir diperoleh bahwa hasil prediksi sangat akurat terjadi pada hari Kamis, Sabtu dan Minggu
Studi Adsorpsi Zat Warna Indigosol yellow dengan Karbon Teraktivasi Asam Fosfat dari Pirolisis Ampas Tebu
Get PDFAdsorpsi menggunakan karbon teraktivasi asam fosfat (H3PO4) dari ampas tebu merupakan salah satu teknik yang efisien dan ekonomis untuk mengatasi limbah zat warna batik indigosol yellow. Penelitian ini bertujuan untuk mempelajari pengaruh variasi konsentrasi asam fosfatsebagai aktivator dalam proses pembuatan karbon aktif tehadap sifat dan kemampuan adsorpsi karbon aktif pada indigosol yellow, yang meliputi pengaruhnya terhadap waktu kontak, konsentrasi dan suhu. Selain itu, jenis adsorpsi dan kinetika adsorpsi juga dipelajari. Variasi konsentrasi asam fosfat yang digunakan adalah 5, 10, 15, dan 20% v/v. Penentuan luas permukaan karbon aktif dengan metode adsorpsi metilena biru menunjukkan jika karbon aktif yang diaktivasi dengan 10% asam fosfat memiliki luas permukaan terbesar yakni 33.2 m2/g. Adsorpsi optimum dicapai pada waktu kontak 15 menit dan menurun seiring dengan meningkatnya waktu kontak. Efisiensi penurunan kadar indigosol yellow dan kapasitas adsorpsi karbon aktif meningkat seiring dengan meningkatnya konsentrasi awal indogosol yellow. Sementara, adsorpsi optimum diperoleh pada pada suhu 30 oC. Proses adsorpsi mengikuti persamaan isotermal Langmuir, yang menunjukkan adanya ikatan kimia, dengan model kinetika orde kedua-semu
STUDI MOLECULAR DOCKING SENYAWA TURUNAN AURON SEBAGAI INHIBITOR GLIKOPROTEIN SPIKE SARS-COV-2
Get PDFThe spike glycoprotein plays a role in binding and inserting viruses into host cells in the human body. Auron-derived natural compounds are believed to be potential inhibitors of spike glycoprotein. In this study, redocking of the native NAG ligand was carried out, as well as molecular docking of the 6VSB spike glycoprotein viral protein. The bond energy value for redocking the native NAG ligand is -6.2 kcal/mol, and the bond energy value for molecular docking of auron derivative compounds is -7.8 to -7.3 kcal/mol. Based on the bond energy value, the compound with potential as an inhibitor of spike glycoproteins is the 3',4, 4',6-tetrahydroxy auron compound. This is supported by the bond energy value and number of hydrogen bonds for this compound of -7.8 kcal/mol, forming four hydrogen bonds
Design and Construction of Flap Type Wave Maker Using Servo-Motor Equipped with The Reducer for Generating Waves in 3-D Wave Tank
Get PDFLaboratory physical models in ocean engineering field are beneficial methods to conduct various research experiments. One of the most important equipment in the ocean engineering laboratory is a wave maker to generate and mimic the actual ocean wave. This research aims to design and construct a wave maker to generate waves on the wave tank with the dimensions of 7.5 m x 15 m x 1 m. The selected type of wave maker is a flap with hinged at the bottom, which is driven by a 3-phase motor 5 HP and gearbox reducer WPA 80 with a ratio of 1:40. The flap was connected to pulley B1-12 by shaft. There are three designs of wave maker system, i.e., stroke length of 0.5 m and the gearbox reducer with ratio 1: 40; stroke length of 0.5 m and the gearbox reducer with vbelt and pulley; stroke length of 0.05 m and the gearbox reducer with ratio 1: 40. The performance of the wave maker shows that the third design is more satisfying and suitable than the two others. However, the absorption structure must be added from both ends of the wave tank to reduce the wave reflection
Kondisi Hidrodinamika dan Transpor Sedimen di Perairan Muara Sungai Ayung dengan Simulasi Delft 3D
Get PDFThe morphology of river mouths is influenced by several factors, including waves, river discharge, tides, currents, and those caused by human intervention. This study explores the dynamics of erosion and sedimentation processes in the estuary of the Ayung River caused by lithology, wind, tides, currents, and waves. This study aimed to determine the effect of river discharge, tides, currents, and waves on erosion and sedimentation in the waters of the Ayung River Estuary. Hydrodynamics and sediment transport modeling using Delft 3D software. As a validation of the modeling results, a calibration was performed on the results of hydrodynamic parameter measurements that had been carried out previously. The review conditions are divided into the rainy season (December – March) and the dry season (April – November). River discharge, tides, currents, and waves affect littoral processes on the shoreline around the waters of the Ayung River. This influence causes erosion and sedimentation around the coastal area and affects sediment transport both in the rainy and dry seasons
Aplikasi Highway Safety Manual (HSM), AASHTO 2010 pada Jalan Tol Surabaya-Gempol
Get PDFJalan Tol Surabaya-Gempol merupakan salah satu jalan tol dengan jumlah kecelakaan teringgi di Jawa Timur. Dalam kondisi ini maka perlu dilakukan upaya pencegahan terjadinya kecelakaan lalu lintas. salah satu upaya untuk mencegah terjadinya kecelakaan lalu lintas adalah dengan melakukan analisis aplikasi Highway Safety Manual (HSM), AASHTO 2010 pada Jalan Tol Surabaya-Gempol, hal ini dilakukan karena Indonesia merupakan salah satu negara yang mengadopsi metode-metode pengukuran keselamatan dari Amerika, Australia atau negara negara di benua Eropa lainnya. HSM merupakan metode yang dapat digunakan oleh perencana lalu lintas untuk mengevaluasi dampak keselamatan dari keputusan selama proses pengembangan proyek. Berdasarkan hasil analisis, metode HSM dapat digunakan untuk memprediksi jumlah kecelakaan lalu lintas pada segmen Jalan Tol Surabaya-Gempol dengan menggunakan faktor kalibrasi (C) sebesar 0,34 sebagai nilai C untuk data rekapitulasi selama lima periode pengamatan. Nilai tersebut menyatakan bahwa jumlah kecelakaan di Jalan Tol Surabaya-Gempol kurang lebih 1/3 dibandingkan dengan jumlah kecelakaan yang terjadi pada Jalan Tol yang terdapat di Amerika
Analysis of The Utilization of Sentinel-2 Imagery for Satellite-Derived Bathymetry Using Lyzenga Algorithm (Case Study: Bali Province)
Get PDFBathymetric surveys nowadays are often used by the echosounding method. This method has weakness because the range that can be surveyed is limited due to cannot reach areas that have shallow depths. With advances in technology, there are alternative ways that can be done to map the depth of the sea, with the help of satellite imagery or remote sensing. This method uses a mathematical algorithm based on a combination of spectrum channels called Satellite-Derived Bathymetry (SDB). In this research, Sentinel-2 satellite imagery was used with Lyzenga algorithm. Lyzenga (2006) uses multilinear regression which is a combination of an equation that aims to convert pixel values into in-situ depth values. Within research of six locations in Bali Province, which are Sangsit Harbor, Gunaksa Harbor, Amed Port, Keramas Beach, Serangan Harbor and Sawangan Beach produced an R2 value each of 0.451, 0.747, 0.495, 0.610, 0.451 and 0.676. While the RMSE values were 26,247, 12,377, 31,942, 3,531, 3,000, and 1,992 respectively for water depths of 146 m, 97 m, 183 m, 22 m, 13 m, and 18 m respectively. The parameters that affect the level of accuracy are: water depth, presence of breaking waves, presence of disturbance objects in the waters