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INDONESIA
Jurnal IPTEK
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : 14117010     EISSN : 2477507X     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal IPTEK - Media Komunikasi Teknologi Diterbitkan secara berkala setahun 2 (dua) kali pada bulan Mei dan Desember oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM), Institut Teknologi Adhi Tama Surabaya (ITATS). Jurnal ini memuat hal-hal yang berkaitan dengan bidang Teknik Sipil, Teknik Mesin, Teknik Elektro, Teknik Arsitektur, Teknik Perkapalan, Teknik Informatika, Teknik Industri, Teknik Kimia, Teknik Lingkungan, Teknik Pertambangan, Teknik Geologi, Desain Produk, Sistem Informasi, dan Sistem Komputer baik yang ditulis dalam bahasa Indonesia maupun bahasa Inggris (diutamakan).
Arjuna Subject : -
Articles 24 Documents
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Search results for , issue "Vol 21, No 2 (2017)" : 24 Documents clear
PENENTUAN ALLOWABLE SPAN ANTAR PENYANGGA PIPA SLF BERDASARKAN TEGANGAN, DEFLEKSI, FREKUENSI ALAMI Mahardhika, Pekik
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (540.581 KB) | DOI: 10.31284/j.iptek.2017.v21i2.149

Abstract

Industri minyak pelumas merupakan industri yang berkembang pesat. Proses pengolahan industri minyak pelumas ada 3 tahapan proses yaitu Pre-flash, Thermal de-asphalthing dan Hydrofinishing. Proses hydrofinishing dibagi menjadi 3 produk oli yaitu Spindel Lube Fraction, High Lube Fraction, Light Lube Fraction. Di industri minyak pelumas terdapat sistem perpipaan SLF (Spindel Lube Fraction). Spindel Lube Fraction dari pompa menuju kondensor. Pipa dan fluida memiliki berat sehingga memerlukan penyangga. Maksimum jarak  yang diijinkan antara penyangga pipa dibatasi 3 faktor utama yaitu tegangan tekuk, defleksi vertikal, dan frekuensi alami. Pipa yang terhubung dengan pompa (Pulsation line) harus memiliki frekuensi alami lebih dari 8 cps. Penelitian bertujuan untuk menentukan maksimum jarak yang diijinkan penyangga pipa dengan perhitungan berdasarkan batasan tegangan, defleksi, dan frekuensi alami. Maksimum jarak yang diijinkan antara penyangga pipa sebesar 9,18 ft (2800 mm) dan pipa memiliki frekuensi alami sebesar 14,41 cps. Jumlah penyangga yang dibutuhkan pada jalur pipa Spindel Lube Fraction yaitu 11 buah penyangga.
PEMILIHAN TEKNOLOGI PROSES GEOTHERMAL SECARA TEKNIS PADA PEMBANGKIT LISTRIK TENAGA PANAS BUMI DI INDONESIA Zuchrillah, Daril Ridho; Handogo, Renanto; Juwari, Juwari
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (933.548 KB) | DOI: 10.31284/j.iptek.2017.v21i2.203

Abstract

Saat ini, geothermal power plant memproduksi beban dasar listrik yang lebih murah, handal dan ramah lingkungan. Namun efisiensi konversi yang terdapat pada pembangkit listrik tenaga panas bumi sangatlah kecil daripada pembangkit listrik tenaga fosil lainnya. PT. Geo Dipa Energi unit Dieng, Jawa Tengah merupakan salah satu perusahan pembangkit listrik di Indonesia yang memanfaatkan energi panas bumi berupa steam sebagai penggerak utama dengan teknologi flash steam. Pemilihan teknologi proses flash steam telah dikembangkan dengan model pendekatan matematis berdasarkan hukum termodinamika menggunakan software Engineering Equation Solver (EES). Pada penelitian ini dapat disimpulkan bahwa kualitas fisik steam yang dihasilkan dari sumur produksi dalam suhu 306 ⁰C dan mempunyai nilai entalpi sebesar 1379,7 kJ/kg, Kondisi operasi separator yang digunakan perangkat lunak EES berada di suhu 179,9 ⁰C dan tekanan 1000 kPa dengan menghasilkan daya listrik sebesar 13.929,63 kWe dengan besarnya efisiensi 23,41 %. Telah dikembangkan simulasi pemodelan dengan kombinasi antara single flash steam dengan binary cycle. Kombinasi teknologi single flash steam dan binary cycle ini menghasilkan daya sebesar 18.456,24 kW dengan efisiensi overall plant sebesar 31,02 %. Hal tersebut memiliki efisiensi terbesar sehingga dirujuk sebagai pilihan teknologi proses geothermal yang tepat untuk PLTP PT. Geo Dipa Energi unit Dieng, Jawa Tengah. Sedangkan teknologi kombinasi single flash dengan dual binary cycle ini menghasilkan daya sebesar 18.329,768 kW dengan efisiensi overall plant sebesar 30,81 %.
PERANCANGAN KINERJA SISTEM INFORMASI DENGAN METODE BALANCED SCORECARD DAN ANALYTICAL HIERARCHY PROCESS Retnawati, Lestari
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (768.31 KB) | DOI: 10.31284/j.iptek.2017.v21i2.154

Abstract

XYZ University as one of private universities in Surabaya which is quite in demand, has the support of Information Systems and Information Technology in carrying out its academic operational activities. But the existence of the information system has not been fully integrated with the related work units, and there are some information systems that are not used as the information system should be within the Technical Implementation Unit of the Information and Communication Technology (UPT TIK). UPT TIK itself is still less than the maximum in carrying out its duties as a unit that takes care of various things related to academic operational activities. As well as the institution itself does not have a strategic planning of information systems and technology coherent between the vision and mission with operational programs. By looking at the above problems, the constraints of information system performance at XYZ University lies in the system and employees and the inability of the institution to formulate and describe comprehensive strategic planning and strategic planning formulation model. Therefore, the authors conduct research with the title “Performance Design of Information System Using Balanced Scorecard (BSC) and Analytical Hierarchy Process (AHP)”. Balanced Scorecard is a measure and a management system that views the performance of a business unit from four perspectives: financial perspective, customer perspective, internal business process perspective, and learning and growth perspective. Weighted results for each perspective are: customer perspective (42.8%), internal business process perspective (35.0%), growth and learning perspective (14.4%), and financial perspective (7.8%). Based on the weighting, performance evaluation is done by comparing the performance measurement result against the performance target. Performance evaluation is done by using Traffic Light System.
SISTEM KEAMANAN OPEN CLOUD COMPUTING MENGGUNAKAN IDS (INTRUSION DETECTION SYSTEM) DAN IPS (INTRUSION PREVENTION SYSTEM) Khadafi, Shah; Meilani, Budanis Dwi; Arifin, Samsul
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (680.87 KB) | DOI: 10.31284/j.iptek.2017.v21i2.207

Abstract

Perkembangan teknologi informasi saat ini semakin cepat, khususnya teknologi keamanan jaringan yang menjadi salah satu teknologi yang harus diperhatikan ketika suatu sistem atau teknologi terkoneksi dengan jaringan. Maraknya kasus serangan pada jaringan komputer terjadi karena tanpa disadari bahwa pihak komputer yang diserang tidak mengetahui bahwa telah terjadi serangan di dalam sistemnya. Salah satu dari teknologi perkembangan jaringan komputer yaitu cloud computing, yang semestinya juga diharuskan memanfaatkan sistem keamanan jaringan. Dengan demikian diperlukan mengimplementasikan IDS (intrusion detection system) di dalam lingkungan open cloud computing menggunakan snort, barnyard2, dan BASE. Penggunaan iptables sebagai firewall pada sistem keamanan jaringan ini. Snort digunakan sebagai aplikasi untuk memantau aktivitas jaringan yang memanfaatkan sistem IPS berjalan pada mode inline, kemudian menampilkan hasilnya melalui aplikasi BASE. Firewall juga diimplementasikan sebagai aplikasi untuk memblokir trafik data dari alamat IP ataupun paket-paket data yang mencurigakan yang sebelumnya dilakukan pencocokan dengan rule yang di-set sebelumnya. Pengujian sistem keamanan open cloud berbasiskan IDS dan IPS menggunakan dua skenario, pertama pengujian sistem IPS aktif dan yang kedua pengujian menggunakan sistem IPS non aktif. Hasil dari pengujian menunjukan, bahwa sistem keamanan open cloud berbasiskan IDS dan IPS mampu memberikan respon dan alert terhadap traffic data yang dipantau dan melakukan pemblokiran adanya serangan. Indikator pengujian yang pertama terlihat pada CPU usage server berkisar antara 59.8% - 85.5%, sedangkan pengujian yang kedua CPU usage server berkisar antara 2% s/d 4% dalam hal ini kembali ke keadaan normal.
PEMBENTUKAN FUNGSI PENGARUH METEOROLOGI PADA PERSAMAAN GAUSS MENGGUNAKAAN SOFTWARE R Handriyono, Rachmanu Eko
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (791.714 KB) | DOI: 10.31284/j.iptek.2017.v21i2.91

Abstract

Air quality model is numerical tools to describe the air quality in an urban. One of the air quality models is gaussian model. Factors that influence the gaussian equation are the sources of pollution, meteorological factors, the kinetics of reactions in the atmosphere, and land forms. These studies formed the function of the influence of meteorology on gaussian equation of traffic activities in Ahmad Yani Street, Surabaya. Meteorological factors such as wind speed and direction, the distance from the source to the receptor, and the atmosphere stability is simulated using software applications R. The purpose of this study is to establish the code foundation of software R for meteorological factors. The results showed the influence of meteorological function model using R is able to produce the work easier and faster time. The influence of meteorological function form a formulation of dispersion coefficient σy dan σz requires variables such as pollution sources and receptor coordinates, wind direction and atmospheric stability class.
Halaman Sampul (Belakang) IPTEK, Redaksi
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1159.791 KB) | DOI: 10.31284/j.iptek.2017.v21i2.217

Abstract

INTERPRETASI KONDISI GEOLOGI WILAYAH VULKANIK MENGGUNAKAN ANALISA CITRA SATELIT LANDSAT 8 (Daerah Studi: Gunung Penanggungan, Jawa Timur) Bahar, Hendra
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (810.211 KB) | DOI: 10.31284/j.iptek.2017.v21i2.195

Abstract

Mount Penanggungan is one of the volcanoes that located in East Java Province, Indonesia, with the current status is a sleeping volcano. Although Mount Penanggungan is not active, it still make an interesting investigation in geological survey, especially to identify the lithological units, due that less researchers took place in Mount Penanggungan. Remote sensing imagery, such as Landsat 8 Satellite imagery series data has been used widely in geology for mapping lithology in general. Remote sensing provides information of the properties of the surface exploration targets that is potential in mapping lithological units. Remote sensing techniques are one of the standard procedures in exploration geology, due to it is high efficiency and low cost. Lithological mapping in Mount Penanggungan area is carried out by analisys Landsat 8 Satellite imagery data with image enhancement techniques, including RGB (red, green, blue) band composite, using band 5, 6, and 7, and band ratio using combination band 4/2, 5/6, dan 6/7. From Landsat 8 Satellite imagery, combines it with the results of surface geological mapping, showed that morphology are mountains, the lithological units are devided to 4 units, andesite boulder, tuf breccias, andesite lava, and andesite breccias.
Halaman Sampul (Depan) IPTEK, Redaksi
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (942.08 KB) | DOI: 10.31284/j.iptek.2017.v21i2.213

Abstract

DISTILASI BERTINGKAT BIOETANOL DARI BUAH MAJA (Aegle Marmelos L.) batutah, moh arif
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (926.968 KB) | DOI: 10.31284/j.iptek.2017.v21i2.104

Abstract

This research of bioethanol processed from fruit maja (Aegle Marmelos L.), the process consists of two stages of fermentation and ethanol fractional distillation for the separation of water with a temperature of 78°C. The fermentation process 5-day produces ethanol content of 60% in the first distillation, fractional distillation is then performed to obtain the ethanol content above 90% and 4 times distilled into ethanol optimal levels above 90%. This distillation produces ethanol content of 92%. etonal content analysis results obtained 92.19%, μ 1.498, ρ 0.8371 , 9546.223 calorific value, flash point: +21, pour point 60ᵒC not frozen and PH 5.
PENGENDALIAN PERSEDIAAN DAN PENJADWALAN PASOKAN BAHAN BAKU IMPORT DENGAN METODE ABC ANALYSIS DI PT UNILEVER INDONESIA, CIKARANG, JAWA BARAT Afianti, Happy Fauzi; Azwir, Hery Hamdi
Jurnal IPTEK Vol 21, No 2 (2017)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1158.748 KB) | DOI: 10.31284/j.iptek.2017.v21i2.200

Abstract

Inventory control becomes a very important activity in a company because the cost of inventory can reach about 20% to 40% of the total annual value. Inventory is a capital or company asset consist of raw materials, work in process and finished product. Currently, the value of inventory at PT Unilever Indonesia Savory Factory has exceeded the maximum target of the company but some raw materials have shortage or stock-out, meaning that the current inventory condition is inefficient because the company invests too much in inventory but the shortage of inventory for certain raw materials still occurs. This is the reason why it is necessary to improve inventory efficiency. Improvements were made by utilizing ABC inventory analysis method and arranging and scheduling raw material supply as needed, then making priority scale of raw material improvement on ABC inventory analysis based on class A, B and C. The research was continued by rescheduling the tracking delivery and counting time frozen horizon which is the amount of time it takes raw materials during the distribution process or delivery process, so the frozen horizon is smaller than lead time. By performing fixed order interval on class A and fixed order quantity raw materials for class B and C raw materials, the quantity of imported raw materials gradually adjust to the needs and the high value of the company’s inventory can be reduced gradually as well. The end result is the risk of shortage can be reduced as much as 26%, overstock can be reduced by 12% and in total overall value over value inventory can be decreased as much as 23%.

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