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JURNAL TEKNOLOGI TECHNOSCIENTIA
Published by Institut Teknologi Nasional Yogyakarta
ISSN : 19798415     EISSN : 27148025     DOI : https://doi.org/10.34151/technoscientia.v8i2.161
Core Subject : Science, Engineering,
Earth & Planetary Sciences Engineering
JURNAL TEKNOLOGI TECHNOSCIENTIA dengan ISSN: 1979-8415 dan E-ISSN: 2714-8025 merupakan jurnal ilmiah yang diterbitkan LPPM Institut Sains & Teknologi AKPRIND Yogyakarta sebagai wahana publikasi karya ilmiah/penelitian di bidang teknologi atau rekayasa meliputi bidang teknik kimia, teknik industri, teknik mesin, teknik elektro, teknik informatika, teknik geologi, dan teknik lingkungan, terbit dua kali setahun pada setiap bulan Februari dan Agustus. Setiap naskah yang dikirim akan dilakukan review secara tertutup. Hasil review naskah meliputi: DITOLAK atau DITERIMA DENGAN PERBAIKAN atau DITERIMA. Setiap naskah yang dinyatakan DIITERIMA dan DITERBITKAN dikenakan biaya proses dan cetak sebesar Rp. 250.000,- (di luar biaya pengiriman) dikirimkan via transfer ke: Bank Mandiri Cabang Yogyakarta No.: 137-00-1255210-1 an.: Prof. Dr. Ir. Sudarsono, M.T.
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 534 Documents
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Jurnal Technoscientia vol 13 no 1 Agustus 2020-Lengkap Technoscientia, Jurnal Teknologi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia-Vol 13 No 1-Agustus 2020
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

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VARIASI KOMPOSISI DINDING CANGKANG FOSIL FORAMINIFERA BENTONIK UNTUK PENENTUAN LINGKUNGAN PENGENDAPAN DAERAH SUNGAI OYO, DESA BEJI, KECAMATAN PATUK, KABUPATEN GUNUNGKIDUL, DAERAH ISTIMEWA YOGYAKARTA Tania, Dina; Kiswiranti, Desi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

The Oyo River, which stretches relatively northwest - southeast in Beji Village, has seven rock facies that make up the Sambipitu Foundation with marl lithology, then the Oyo Formation is deposited on it with claystone lithology, breccia, tuff and sandstones, and the Wonosari Formation with calcirudite lithology and calcarenite based on stratigraphic measurements as thick as 165 meters with dips ranging from 5o-15o. The variation in the composition of the bentonic foraminifera shell wall in the Oyo River rocks reflects environmental changes from normal marine lagoon and carbonate platforms to a continental slope and sea shelf when referring to the triangular plot of Murray (1991) and Brasier (1980) based on the type of shell composition Loeblich and Tappan (1988). The existence of sedimentary structures also shows a transition from a lower fan in the Sambipitu Formation to a suprafan lobes on the mid fan in the Oyo Formation based on the underwater fan model Walker (1978) and ending up as an inner ramp according to Buchette and Wright (1992) by Tania (2019). This is in line with the depositional environment by Tipsword et.al. (1966) and the foraminifera group by Bignot (1982) which shows that the Sambitu Formation is dominated by porcelaneous in the middle bathyal, then the Oyo Formation is dominated by agglutine in the upper bathyal and the Wonosari Formation on the outer-inner neritic is dominated by porcelaneous.middle bathyal, then the Oyo Formation is dominated by agglutine in the upper bathyal and the Wonosari Formation on the outer - inner neritic is dominated by porcelaneous.
REPRESENTASI OBJEK 3D MENGGUNAKAN TEKNIK RENDERING RAY-TRACING DAN RADIOSITY -, Harmastuti; Setyowati, Dwi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

Representasi objek 3D dapat dilakukan dalam beberapa cara diantaranya menggunakan teknik rendering ray-tracing dan Radiosity. Radiosity dan ray-tracing adalah teknik rendering untuk menampilkan citra 3D pada layar tampilan 2D yang mensimulasi perjalanan sinar cahaya yang bergerak di dunia nyata. Dalam dunia nyata pancaran sinar dari sumber cahaya akan mengiluminasi permukaan objek. Dalam artikel ini dibahas representasi 3D dengan teknik rendering ray-tracing dan radiosity pada objek bola, kerucut, dan box. Objek berada di luar dan di dalam ruangan. Setelah objek dipilih, permukaan objek yang akan dimunculkan pada display diberi efek pencahayaan dengan teknik rendering ray-tracing dan radiosity. Selanjutnya dianalisis perbedaan dan kesamaan hasil rendering objek menggunakan perangkat lunak POV-Ray. Hasil analisis objek 3D yang tersusun di dalam ruangan adalah kecepatan rendering menggunakan teknik ray-tracing sebesar 2,15 detik dan radiosity sebesar 12,42 detik. Proses rendering objek menggunakan teknik radiosity memerlukan memori lebih besar dibandingkan ray-tracing.
PEMANFAATAN SISA HASIL POTONGAN KAYU MAHONI SEBAGAI BAHAN BAKU PEMBUATAN BRIKET BIOARANG DENGAN PEREKAT TEPUNG TAPIOKA Suseno, Hadi Prasetyo; Sukmawati, Paramita Dwi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

Penelitian ini bertujuan untuk mengetahui ukuran serbuk arang dan jumlah perekat yang optimal berdasarkan pengamatan kadar air, kadar abu, dan nilai kalor pada briket bioarang. Hasilnya kemudian dibandingkan dengan baku mutu briket sesuai SNI 01-6235-2000 tentang briket kayu, kadar air maksimal 8% b/b, kadar abu 8% b/b, dan nilai kalor minimal 5000 Kal/g. Sampling kayu diambil di Kecamatan Pecangan Kulon RT 04 RW 03 Kabupaten Jepara, diambil dari kumpulan sisa proses penggergajian kayu mahoni. Sampling dilakukan pada bulan Agustus 2018. Proses pengovenan dilakukan untuk menurunkan kadar air pada sisa hasil potongan kayu mahoni dengan suhu 600 selama 15-20 menit dan dilanjutkan dengan proses pirolisis agar sisa hasil potongan kayu mahoni menjadi serbuk arang dengan suhu ± 300 °C. Serbuk arang divariasikan dengan ukuran 10, 20, 30, 40, dan 50 mesh dan dicampur perekat masing-masing 6%. Setelah hasil optimal didapatkan, divariasikan kembali dengan jumlah perekat 2%, 4%, 6%, 8%, dan 10%. Pengamatan vairiasi ukuran serbuk arang menunjukan hasil yang optimal pada ukuran 20 mesh, dengan kadar air 5,96%, kadar abu 3,27%, dan nilai kalor 6196,38 Kal/g. Variabel variasi perekat menunjukan hasil yang optimal pada jumlah perekat 2% dengan hasil kadar air 5,78%, kadar abu 2,66%, dan nilai kalor 6.282,24 Kal/g. Secara keseluruhan kualitas briket bioarang sisa hasil potongan kayu mahoni memiliki kadar air, kadar abu, dan nilai kalor cukup baik, sehingga briket bioarang sisa hasil potongan kayu mahoni dapat dijadikan sebagai bahan bakar alternatif.
STATICS ANALYSIS OF PLANAR TRUSSES STRUCTURE WITH FINITE ELEMENT SOFTWARE Saputra, Hadi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

A truss is a structure that is a combination of several slender members. The high performance of the truss structure has been the first effort. The advancement of the truss structure analysis is required. Traditionally, analysis of truss structure is usually done with joints or section methods. There are not secure to solve with the theoretical statically determinate. Otherwise, more advanced techniques are compulsory. This report aims to use the finite element methods software to learn the behavior of truss structures and to compare with the theoretical of statically determinate manual calculation. The result has been shown that both methods had been given the similarity results. It means that the finite element software (Abaqus student editions software) entirely accurate to be used to analyze the 2D-trusses structure. Hopely its can be used to solve other complex problems in construction analysis.
AUDIT ENERGI DAN ANALISIS PELUANG PENGHEMATAN ENERGI PADA RUANG KULIAH KAMPUS I IST AKPRIND YOGYAKARTA DALAM UPAYA MENUJU KAMPUS BERWAWASAN LINGKUNGAN Sukmawati, Paramita Dwi; -, Purnawan
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

Electrical energy is one of the most important human needs and cannot be released from daily needs. Almost all human work requires electrical energy, the use of electrical energy is usually more widely used in large buildings such as office buildings, factories, hotels, and also includes universities that use large-capacity electrical energy. However, the source of energy for electricity generation is conventional energy sources derived from petroleum and coal which if used in excess will be able to endanger and damage the surrounding environment. Steam Power Plant (PLTU), as the largest electricity supplier that has produced electricity through coal burning, contributes to the phenomenon of global warming. In addition, it can also cause depletion of oil and coal reserves due to the non-renewable nature of oil and coal. So, indirectly our consumptive nature of electricity increases the supply of electricity and in the process of producing electricity can damage the environment. Because it has to do with saving electrical energy from households to industries. One method that is often used to make efficient use of electrical energy is the Energy Conservation method. Energy Conservation is an increase in energy efficiency that is used or commonly called the energy saving process, in this method there is an Energy Audit. The energy audit in this study was conducted in the Lecture Room of Campus I IST AKPRIND Yogyakarta in an effort to go to an environmentally friendly campus. The Value of Energy Consumption Intensity (IKE) in the lecture room at Campus I of IST AKPRIND Yogyakarta is very efficient. But for the value of intensity of the lighting in all of the classes do not meet the value of the average lighting levels based on SNI 03-6197-2000, so the lecture room comfort level has not been reached. For this reason, it is necessary to add lighting in the lecture room at Campus I of IST AKPRIND Yogyakarta.
ANALISIS KUALITAS INTRUSI ANDESIT SEBAGAI BAHAN BANGUNAN BERDASARKAN SIFAT KETEKNIKAN DI DAERAH BEJI, KECAMATAN UNGARAN TIMUR, KABUPATEN SEMARANG, JAWA TENGAH Retongga, Nofrohu; Purnamawati, Dwi Indah; Rakhman, Arie Noor
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

This study aims to identify the quality of andesite intrusive rocks as a building material. The research location is in the Beji area, East Ungaran District, Semarang Regency, Central Java Province. Analysis of rock quality using data from the test results of engineering and petrographic properties. The andesite studied is an intrusion into basalt. Based on the quality standard requirements for natural stone for buildings (SNI 03-0394-1989) these rocks can be mined for building materials, especially medium to heavy building foundations (1,150.040 -1,421.621 kg/cm2). The middle andesite has a higher strength than the lower andesite. The strength of the rock is supported by resistant minerals in the form of plagioclase, which dominates up to 35%. However, in the andesite body getting down, olivine tends to decrease by 5%. The weathering of these minerals is influenced by the condition of the water in the rock where the water content is 0.391 to 0.412%. In water-saturated conditions, the degree of saturation of the lower rock can reach 100%, exceeding the rock above, 87.5%. The strength of the rock at the bottom is lower, making the slope potentially easy to collapse when the mining method is started from the bottom, especially the excavation is carried out on steep vertical slopes.
IMPLEMENTASI LOGIKA FUZZY MAMDANI PADA SISTEM PENDUKUNG KEPUTUSAN PENENTUAN JUMLAH STANDAR KARYAWAN TOKO Dharmalau, Andy; Hiswara, Indra
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

Operasional toko Indomaret sering mengalami kelebihan atau kekurangan karyawan. Hal ini menyebabkan kurang efektif, terganggunya operasional, dan kerugian finansial. Implementasi logika fuzzy pada sistem pendukung keputusan (SPK) banyak digunakan seperti: logika fuzzy untuk sistem pengaturan suhu ruangan, automatic transmission system pada beberapa kendaraan bermotor, sistem penilaian karyawan, dan lain-lain. Penelitian ini mengimplementasikan logika fuzzy Mamdani untuk menentukan jumlah standar karyawan pada toko Indomaret. Faktor-faktor yang mempengaruhi jumlah satndar karyawan toko adalah model display rak, Sales per day dan tipe toko. Hasil dari penelitian dibuat sebuah aplikasi SPK untuk menentukan jumlah standar karyawan pada masing-masing toko. Aplikasi yang dirancang dapat menjadi solusi untuk menentukan berapa jumlah karyawan yang diperlukan dalam satu toko.
PENENTUAN JUMLAH TENAGA KERJA OPTIMAL DENGAN PENDEKATAN WORKLOAD ANALYSIS (STUDI KASUS DI PB. SRI TANI) Yunanta, Arrijal Luthfia; Darajatun, Rizki Achmad; -, Kusnadi
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

PB. Sri Tani is one of the Rice Milling located in Banyusari, Karawang. In the production process, the owners still did not know the standard time, the number of workers used, and the proper job description based on the number of optimal workers. The purposes of this study were to find out what is the standard time using the stopwatch time study method, rating factor, allowance and to determine the number of optimal workers use the workload analysis approach, then distribute the job description based on the number of optimal workers. As for, based on the results of research and calculations using the stopwatch time study method, it was known that the time to process a sack of rice was 3.17 minutes and to produce 6 tons (120 sacks) it took 380.4 minutes or 6.3 hours. The number of optimal workers based on the work load analysis (WLA) method was 5 people that it was using 6 people previously, and then it can save the salary payments Rp. 1,100,000 per month. In addition, it has been proposed that the work positions and job descriptions for 5 workers.
PENYERAPAN AMONIA, NITRIT, NITRAT DAN FOSFAT PADA LIMBAH TAMBAK UDANG MENGGUNAKAN ALGA Chaetomorpha Crassa DENGAN METODE FITOREMIDIASI -, Purnawan; Hastutiningrum, Sri; Dany, Ajie Kusuma
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 13 No 2 Februari 2021
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

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Abstract

Udang merupakan salah satu komoditas penting dan ekspor utama Indonesia. Semakin tingginya permintaan udang mengakibatkan budidaya tambak udang memiliki prospek untuk dikembangkan. Semakin tingginya permintaan udang mengakibatkan semakin tingginya produksi udang, sehingga bertambah pula limbah yang terbentuk akibat kegiatan budidaya udang. Limbah tambak udang berupa nutrien dapat mengakibatkan eutrofikasi yang berdampak buruk bagi lingkungan air. Penelitian ini bertujuan untuk mengetahui tingkat penyerapan alga Chaetomorpha crassa dalam menurunkan kadar amonia, nitrit, nitrat dan fosfat pada limbah tambak udang. Penelitian terdiri atas uji pendahuluan dan utama. Uji pendahuluan bertujuan untuk mengetahui konsentrasi pengenceran limbah tambak udang yang efektif untuk menurunkan nutrien dengan konsentrasi pengenceran 100%, 50%, dan 10% dengan berat basah alga 100 gram selama 8 hari. Setelah didapatkan konsentrasi pengenceran yang efisien dilihat tingkat penurunan pada waktu tinggal 0, 2, 4, 6, dan 8 hari dengan berat basah alga 100 gram. Penelitian utama bertujuan untuk mengetahui seberapa besar pertumbuhan alga Chaetomorpha crassa dengan menghitung pertambahan berat basah alga. Hasil penelitian pendahuluan menunjukkan pengenceran limbah tambak udang untuk menurunkan nutrien paling efektif pada konsentrasi 100% dengan penyerapan amonia sebesar 0,0120 ppm, nitrit 0,0016 ppm, nitrat 0,0407 ppm, fosfat 0,1731 ppm, dan berat alga 32,1280 gram. Hasil penelitian pada konsentrasi pengenceran yang efektif selama 8 hari yaitu amonia 0,0120 ppm, nitrit 0,1746 ppm, nitrat 0,6846 ppm, fosfat 0,3171 ppm, dan pertumbuhan berat alga sebesar 19,08 gr. Alga Chaetomorpha crassa dapat diaplikasikan langsung ke dalam limbah tambak udang untuk menurunkan nutrien pada tambak udang.

Page 48 of 54 | Total Record : 534

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