This Author published in this journals
All Journal Bina Teknika
Suprijatmono, Djoko
Unknown Affiliation

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

Pengujian Pengaruh Ketinggian Weir pada Koefisien Discharge dari Weirmeter Sharp-Crested V-Notch 90o Komarudin, Komarudin; Suprijatmono, Djoko; Pati, Gennady Chitra
Bina Teknika Vol 15, No 1 (2019): Bina Teknika
Publisher : Fakultas Teknik UPN "Veteran" Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (777.444 KB)

Abstract

Weirmeter is a discharge gauge on an open-channel flow that is usually applied to dams and rivers. In each weirmeter there is a discharge coefficient (Cd), which is the coefficient multiplied by the theoretical discharge to obtain the actual discharge because the pressure difference and flow velocity are neglected. The Cd is directly proportional to the discharge. The actual debit measurement results do not approximate the result (the multiplication of the theoretical debit with Cd). This difference may be due to unequal Cd values for each weir dimension, one of which is the weir height (P). Therefore it is necessary to test the weirmeter with P varies in order to know the pattern and the value of Cd. The tested weirmeter is sharp-crested v-notch 90o with a length of 200 cm and a width of 35.5 cm. P used is 20.3 cm; 21.3 cm; and 22.3 cm. From the test, the Cd value is inversely proportional to P although some of these test results are far from the theory because it requires a 90% confidence interval on the Student distribution (t distribution). The value of Cd in weirmeter used is 0.6996 for P 20.3 cm; 0.6657 for P 21.3 cm; and 0.5781 for P 22.3 cm.
SIMULASI PERANCANGAN MODEL SKEMA ANTRIAN PADA JARINGAN WAN UNTUK PENINGKATAN LAYANAN KINERJA MULTIMEDIA Suprijatmono, Djoko; Mukhlis, Khoirul
Bina Teknika Vol 15 No 2 (2019): Bina Teknika
Publisher : Faculty of Engineering UPN "Veteran" Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1828.413 KB) | DOI: 10.54378/bt.v15i2.1275

Abstract

ABSTRACT: This research implements several queuing scenarios, such as FIFO (First in First out), PQ (Priority Queuing) and WFQ (Weighted Fair Queuing) on routers connected to WAN networks. Simulations are carried out using OPNET Modeler 14.5 with a WAN network topology that connects the Data Center with several different city users or clients, for QoS parameters such as packet loss, delay, and jitter in multimedia services such as FTP, video, and VoIP. The reference of QoS standard is the standard issued by ETSI (European Telecommunications Standards Institute) and ITU (International Telecommunication Union). The use of queuing scheme is also effective for reducing the value of delay and jitter for video and VoIP services, as proven in the graph that looks down from the beginning to the end. The WFQ queue scheme overall has the best QoS value, which means it provides weight with 50% on the video, 40% on the VoIP, and 10% on FTP proved effective for the design of topology and configuration in these research. Results all of queuing scheme such as FIFO, PQ, and WFQ queues generally satisfy of the QoS standards issued by ETSI and ITU, but delays in VoIP services have more value than the preferred standards but still far from the limit standards. Keywords: WAN, QoS, FIFO, PQ, WFQ ABSTRAK: Penelitian ini mengimplementasikan beberapa skenario skema antrian, yaitu FIFO (First in First Out), PQ (Priority Queuing) dan WFQ (Weighted Fair Queuing) pada router yang terhubung dengan jaringan WAN. Simulasi dilakukan menggunakan OPNET Modeler 14.5 dengan topologi jaringan WAN yang menghubungkan Data Center dengan beberapa user atau client yang berbeda kota, untuk mengamati parameter QoS seperti packet loss, delay, dan jitter pada layanan multimedia seperti FTP, video, dan VoIP. Standar QoS yang menjadi acuan adalah standar yang dikeluarkan oleh ETSI (European Telecommunications Standards Institute) dan ITU (International Telecommunication Union). Penggunaan skema antrian juga efektif menurunkan nilai delay dan jitter pada layanan video dan VoIP, terbukti pada grafik yang terlihat menurun dari waktu awal ke akhir. Secara keseluruhan skema antrian WFQ memiliki nilai QoS yang paling baik, yang berarti pemberian bobot konten paket 50% pada video, 40% pada VoIP, dan 10% pada FTP terbukti efektif untuk perancangan topologi dan konfigurasi yang dibuat. Hasil skema antrian FIFO, PQ, dan WFQ secara umum sudah memenuhi standar QoS yang dikeluarkan oleh ETSI maupun ITU, namun delay layanan VoIP memiliki nilai sedikit diatas standar istimewa tetapi masih jauh dibawah dari standar limit yang ditentukan. Kata Kunci: WAN, QoS, FIFO, PQ, WFQ