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Ani Tjitra Handayani
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KURVATEK
Published by Institut Teknologi Nasional Yogyakarta
ISSN : -     EISSN : 24777870     DOI : https://doi.org/10.33579/krvtk.v4i1
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences
Jurnal KURVATEK diterbitkan pertama kali tahun 2016 oleh Pusat Penelitian dan Pengabdian masyarakat pada Sekolah Tinggi Teknologi Nasional Yogyakarta. Jurnal ini mempunyai misi sebagai media pengembangan ilmu pengetahuan dan teknologi dalam bidang geologi, pertambangan, elektro, sipil, material teknik,konversi energi, enegi terbarukan, serta perencanaan wilayah dan kota. Area tulisan dalam jurnal ini cukup luas. Cakupan penulisan mulai dari kajian pustaka maupun ekperimen yang ditulis dengan kaidah-kaidah penulisan ilmiah yang baik dan benar.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 265 Documents
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TINJAUAN PENGGUNAAN ABU SISA PEMBAKARAN BATU BARA PABRIK DILEM TERHADAP KUAT TEKAN BETON Dwi Sri Wiyanti; Taufik Dwi Laksono; Atiyah Barkah
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1816

Abstract

Many concrete study studied the use of substitute material that is fly ash, a coal combustion product from the steampowered electric generator. Coal is also used by PT. SCI, a Dilem leaves processing industry in Purbalingga regency. To determine whether the utilization of the residual ash from coal combustion of Dilem leaves industry meet the required compressive strength, a study was conducted on the compressive strength of concrete that use coal combustion ashes from PT SCI. The purpose of this study is to find out the effect of using coal combustion ash on concrete compressive strength and to find out the deviation in compressive strength of concrete that produced with the 10%, 12.5%, 15%, and 17.5% of coal combustion ashes on the weight of cement. The use of coal combustion ash affects the compressive strength of concrete and 12.5% of coal combustion ash as a cement substitution gives the maximum compressive strength that is 23.0 Mpa.Keywords: Concrete, Compressive Strength of Concrete, Fly Ash, Coal Combustion Ash
PALEOMORFOGENESIS BENTANG ALAM KOMPLEKS GUNUNG IJO, KULONPROGO Rr. Amara Nugrahini; Hill Gendoet Hartono; T. Listyani R.A.
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1831

Abstract

Geomorphological studies of the Mt. Ijo complex area need to be done to understand the geomorphology of the past. The purpose of the study was to identify geomorphological characteristics in order to gain an understanding of Mt. Ijo's paleomorphogenesis. The research was conducted using geomorphological observation methods in the field and assisted by rock petrographic analysis. Mt. Ijo is an old volcano that forms the West Progo Hills. The Mt. Ijo complex is composed of a predominance of igneous and volcanic rocks in the form of coherent lava and pyroclastic, in addition to sedimentary rocks in the form of limestone. The Mt. Ijo complex forms the remains of an ancient volcano. The remaining morphology is interpreted as part of the ancient volcanic body in the central and proximal facies.Keywords: Mt. Ijo, paleomorphogenesis, volcanic facies, remaining landform
ANALISIS DEWATERING SYSTEM DALAM TAMBANG EMAS BAWAH TANAH A.A Inung Arie Adnyano; Achmanda Belvadi Sahmin Pane
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1852

Abstract

Underground mining location Ciurug L.450 south, there is a lot of water entering or stagnant in the mine opening hole. At Ciurug L.450 south there are 10 mine sumps. The pumping system flows from one mine sump to the next mine sump to the main mine sump. The pump is used 24 units and is used interchangeably because electricity is limited and one pump works 15 hours / day. The purpose of this study is to reduce the number of pumps that do not work optimally and the use of electric power. Groundwater discharge measurements were carried out manually in three locations namely Ramp Down A, Ramp Down B, and Ramp Down C using trenches. Based on observations and data analysis, groundwater discharge XC 445 2,899 (m3 / m), XC 438 B 8,940 (m3 / m), and XC 438 A 1,440 (m3 / m). The actual electricity consumption of 1561,7 Kw was reduced after being designed to be 1061.5 Kw, and a design 19 pumps units was used.Keywords: Flow System, Pump, Water Discharge
PENGGUNAAN FILTER AKTIF DENGAN PI CONTROLLER UNTUK MEREDAM HARMONISA PADA PEMBANGKIT LISTRIK TENAGA SOLAR CELL Diki dwi aprisetiawan Diki; Istiyo Winarno; Belly Yan Dewantara
KURVATEK Vol 6 No 1 (2021): April 2021
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v6i1.1853

Abstract

In an ideal electric power system, electrical energy is transmitted constantly both frequency and current. Because increasing power loads are more complex, especially non-linear loads, it will change the waveform and current spectrum to be distorted. The distorted waves and spectra in the current are due to the interaction between the sinusoidal wave system and other wave components known as harmonics. This study discusses changes in waves and spectrum in the PV mini-grid system by using active filters using PI control using a controlled rectifier load load with an ignition angle of 35 ° -180 ° so that the spectrum wave defect shape will be seen in non-linear loads that have an impact on equipment disturbances such as overheating increases losses and makes electronic devices fast. Active filter using PI control is based on a single-phase inverter with four control switches, the inverter will be connected in parallel with nonlinear loads. From the trial using Power Simulation (PSim) simulation software, it displays the simulation results with a spectrum of waves which is the application of active filter design. The simulation results show an improvement in waveform, spectrum graph and THD by installing active filters using PI control.
PENGARUH AKTIVITAS PERTAMBANGAN TERHADAP NILAI PRODUK DOMESTIK REGIONAL BRUTO DAN EKONOMI MASYARAKAT DI PROVINSI KALIMANTAN TIMUR Wahyu Endah Christiani Putri; Akhmad Zamroni; Fajar Rizki Widiatmoko
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.1854

Abstract

Gross Regional Domestic Product (GRDP) is a macroeconomic indicator of the economic condition in a region. The development of GRDP per capita is often used as an indicator of a region's success in economic development. One of the economic sectors that is an indicator of the success of regional development is the mining and excavation sector. East Kalimantan Province is a province with a wealth of natural resources in the form of coal mining. The purpose of this study is to analyze the effect of mining activities in East Kalimantan on the value of the GRDP and the economic conditions in that region. The results showed that mining activities had a significant effect on the GRDP per Capita and the economic conditions of the people in East Kalimantan Province. GRDP according to mining and excavation fields has an effect of 0.9431 on GDP per capita in East Kalimantan Province. The number 0.9431 in statistics means that the X coefficient has a strong effect on the Y coefficient. All decreases and increases in mining and excavation fields have a significant and proportional effect on the economic conditions of the people in East Kalimantan Province.Keywords: Gross Regional Domestic Product (GRDP), mining, economic conditions, East Kalimantan.
IDENTIFIKASI RONGGA MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI DIPOLE-DIPOLE DAERAH NUSAKAMBANGAN CILACAP JAWA TENGAH Andi; Ajimas Pascaning Setiahadiwibowo
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.2005

Abstract

The identification of cavities on Nusakambangan island using the geoelectrical resistivity method of dipole-dipole configuration has been carried out. This method was used for lateral resistivity mapping on each path. The geoelectric resistivity test was performed by four paths with a length of 200 - 400 m. The results showed that there were several closure patterns that were interpreted as cavities along the surveyed trajectory. The closure patterns are (i) three on path A with a resistivity of more than 4000 ohmmeters, (ii) two on path B with a resistivity of more than 10000 ohmmeters, (iii) one on path C with a resistivity of more than 10000 ohmmeters, and (iv) two on path D with a resistivity of more than 2000 ohmmeter. Our results could be used as an illustration to mark locations on the surface where the sinkhole potential of a disaster exists.Keywords: Cavity; Dipole-dipole; Geoelectric; Resistivity
KAJI EKSPERIMENTAL SISTEM DESTILASI ASAP PEMBAKARAN SAMPAH PLASTIK MENJADI BAHAN BAKAR ALTERNATIF DENGAN PENDINGINAN SISTEM REFRIGERASI KOMPRESI UAP Arda Rahardja Lukitobudi; Sugiyarto; Muhammad Setya Ramadhan; Dinda Ainun Qolbi
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.2081

Abstract

One step to reduce plastic waste and at the same time to produce alternative fuel is by pyrolysis of smoke destilation of plastic waste burning result because basically the material of plastic waste is hydrocarbon. This research will be discussed about experimaental study of smoke destilator machine of plastic waste burning result using vapor compression refrigeration system in various temperature without analizing the economical factor. There was two step destilation done, using local temperature air and by refrigerated heat exchanger using 35% propylene glycol as secondary refrigerant and with R134A as the primary refrigerant. In destilation step using secondary refrigerant was done by baffled counter flow tube in tube heat exchanger in order to obtain turbulent flow and was done in various temperature that was local temperature air and temperature under 10℃: 9℃, 3℃ and -3℃. The plastic waste which was burnt is 2 kg Low Density PolyEthylene LDPE using reactor with L:40cm x W:40cm x H:60cm and 3 kg elpiji gas burner in temperature of ±400°C. The design was assumed to maximize plastic waste burnt result smoke destilation process. The lower destilation temperature generate the higher alternative fuel volume. During ±4 hours measurement, with temperature of 9℃ generates 480 mL fuel, while 3℃ generates 615 mL fuel, -3℃ generates 710 mL fuel and with local temperature destilation only generates 390 mL fuel.
PEMBUATAN WEB BASE SIMULATOR PLANT DENGAN PLC UNTUK KULIAH PRAKTIKUM SECARA DARING Muhamad Anda Falahuddin; MUHAMMAD ARMAN; Farash Arya Pratama; Muhammad Rasyid Ali
KURVATEK Vol 5 No 2 (2020): November 2020
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v5i2.2082

Abstract

The COVID-19 pandemic condition has made lecture activities shift to online lectures. For theoretical lectures, it is relatively easy to do, but for practical activities, facilities are needed in the form of a plant simulator. In this research, create a web-based plant simulator using PLC Logo! Siemens. The initial stage of this process is to create a simulator using the PLC Logo! locally. This simulator draws the relationship of a number of digital inputs and digital outputs, programmed using the logo software! soft. Furthermore, a web base simulator is developed using a web editor, so that the simulator can be accessed through web access by students. The tests carried out include functional testing locally and online device access testing by students. The test results show that the web base simulator plan can be used as an online practicum tool in a limited environmentKeywords: Web server, simulator, PLC
RELIABILITAS ANALISIS BALIK KELONGSORAN LERENG LOWWALL DENGAN PENDUGAAN PARAMETER GEOTEKNIK DAN REMEDIASI LERENG MENGGUNAKAN METODE BEDA HINGGA Novandri Wardana; Dian Eka Aryanti; Rochsyid Anggara
KURVATEK Vol 6 No 1 (2021): April 2021
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v6i1.2083

Abstract

Faktor ketidakpastian dan parameter variabilitas spasial batuan menjadi faktor penting dalam konsep menganalisis kestabilan lereng. Karakteristik massa batuan yang menunjukkan sifat acak (random) menghasilkan pola distribusi tertentu. Masalah keandalan dalam beberapa segment dapat menggunakan metode tradisional seperti metode kesetimbangan batas (LEM). Sedangkan, untuk metode numerik yang lebih detail dalam perhitungan menggunakan Metode Finite Difference. Finite Difference Methods (FDM) merupakan sebuah metode numerik untuk menganalisis reliabilitas lereng batuan yang menggabungkan teori analisis batas plastis, elemen kaku dan teori pemrograman matematika metode Monte Carlo. Kemiringan batuan dipisahkan menjadi blok antarmuka (interface) menggunakan metode beda hingga untuk menetapkan medan tegangan statis. Selain dari itu, model pemrograman stokastik untuk melakukan analisis reliabilitas lereng batuan yang ditetapkan sesuai FK berdasarkan parameter kekuatan geser interface variabel acak. Dalam Perhitungan FK menggunakan metode sampling Point Estimate Methods dalam penenentuan Probabilitas Kelongsoran. Hasil Analisis menunjukkan bahwa analisis reliabilitas lereng sangat dipengaruhi oleh variabilitas yang melekat pada sudut lereng (friction angle) dan kondisi hidrogeologi pada batuan. Kata kunci: Finite Difference Method, Back Analysis, Point Estimate Method, Reliabilitas, Shear Strength Interface
Identifikasi Elemen Kota Tangguh dalam Kebijakan Pembangunan dan Tata Ruang Kota Semarang Novi Maulida Ni'mah; Lulu Mari Fitria; Godelifa Fanumby; Ita Yuliani
KURVATEK Vol 6 No 1 (2021): April 2021
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v6i1.2084

Abstract

Semakin populernya pengarusutamaan ketangguhan (resilience) dalam konteks pembangunan kawasan perkotaan yang berkelanjutan maka diperlukan tata kelola pemerintahan yang mampu beradaptasi terhadap perubahan lingkungan akibat dampak bencana dan perubahan iklim. Mengacu pada the New Ten Essentials for Making Cities Disater Resilient UNISDR maka penelitian ini bertujuan untuk mengidentifikasi kota tangguh bencana melalui perspektif kebijakan. Penelitian ini akan mengidentifikasi elemen kota tangguh dalam kebijakan pembangunan dan tata ruang Kota Semarang sebagai kota di Indonesia yang telah ditetapkan sebagai 100 Resilient City. Metode yang digunakan dalam penelitian adalah literature review atas kebijakan. Hasil dari penelitian ini adalah The New Ten Essential yang paling mendominasi kebijakan ada tiga kriteria yaitu Pursue resilient urban development and design (Mengejar pembangunan dan desain perkotaan yang Tangguh), Safeguard natural buffers to enhance the protective functions offered by natural ecosystems (Menjaga penyangga alami untuk meningkatkan fungsi perlindungan yang ditawarkan oleh ekosistem alami), dan Increase infrastructure resilience (Meningkatkan ketangguhan infrastruktur).Kata kunci: Kota Tangguh, Tata Kelola, Kebijakan, The New Ten Essential, UNISDR.

Page 12 of 27 | Total Record : 265

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