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All Journal Jurnal Teknik Elektro Jurnal Zarah
Adi Putranto
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Chemistry Education Electrical & Electronics Engineering

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SIMULASI KUALITAS LAYANAN VOIP MENGGUNAKAN METODE ANTRIAN PAKET CBQ DENGAN MEKANISME LINK SHARING Agoes, Suhartati; Putranto, Adi
Jurnal Teknik Elektro Vol 7, No 1 (2007)
Publisher : Jurnal Teknik Elektro

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Main problem faced by Voice over IP service is the level of delay and packet loss yielded.Queue delay that happened when packet enter router interface have a big effect in real-timecommunications like Voice over Internet Protocol (VoIP). First In First Out (FIFO) QueueSystem does not own arrangement to traffic passing through it, all packets assumed equal. IfVOIP packets queue up together with data packet at this system hence the delay yielded willbe very big. A correct queue method needed to improve network delay characteristic andimprove Quality of Service (QOS) of VoIP. One QOS management method on VoIP which canbe used is CBQ (Class Based Queuing) queue method. CBQ represent scheduling mechanismproviding link-sharing among classes using same physical link. This is the method enabledivision of bandwidth allocation from router output port as according to traffic type andpriority. In the event of congestion, traffic with high priority will accept minimum bandwidthallocations as which have previous reservation. At the simulated scenario and networktopology, CBQ queue method able to meet the requirement of maximum delay according toITU recommendation G.114. Based on calculation conversion R factor value to MOS by usingE-Model, CBQ can assign MOS value more than 4 (four), meaning its value is good. So thatVoIP service is competent to be implemented.Keyword: Bandwidth, CBQ, FIFO, link-sharing, MOS
PENGEMBANGAN INSTRUMEN THREE TIER TEST PADA KONSEP ATOM, ION, DAN MOLEKUL Putranto, Adi; Langitasari, Indah; Nursa’adah, Euis
Jurnal Zarah Vol 8 No 1 (2020): Jurnal Zarah
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Maritim Raja Ali Haji

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v8i1.1349

Abstract

Atom, ion, dan molekul merupakan salah satu konsep dasar kimia yang bersifat abstrak dan saling berkaitan dengan konsep lainnya, serta menitikberatkan pada definisi konsep dan perhitungan. Hal tersebut menimbulkan adanya miskonsepsi. Peserta didik yang mengalami miskonsepsi pada konsep tersebut, maka akan kesulitan memahami konsep selanjutnya seperti persamaan reaksi, tata nama senyawa, stoikiometri, serta ikatan kimia. Miskonsepsi perlu diatasi agar pengajar dapat menghindari kesalahan pada proses pembelajaran yang menekankan pada konsep yang dianggap sulit. Oleh karena itu, dilakukan pengembangan instrumen untuk mengidentifikasi miskonsepsi peserta didik. Instrumen three tier test dinyatakan valid dan reliabel, serta dapat mengetahui tingkat konsepsi peserta didik. Hasil uji CVR melebihi 0,49 dan nilai cronbach’s alpha 0,842. Tingkat konsepsi peserta didik yaitu 43,72% memahami konsep, 13,32% kurang memahami, 8,92% miskonsepsi negatif, 12,70% miskonsepsi positif, dan 17,93% miskonsepsi.
Co-Authors Indah Langitasari Nursa’adah, Euis Suhartati Agoes