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All Journal Jurnal Media Elektro : Journal of Electrical Power, Informatics, Telecommunication, Electronics, Computer and Control System
Pella, S. I.
Universitas Nusa Cendana
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Disain Sistem Pengindraan Level Intensitas Curah Hujan berbasis Minicomputer Lami, H; Pella, S. I.
Jurnal Media Elektro Vol 7, No 1 (2018): APRIL 2018
Publisher : Universitas Nusa Cendana

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Abstract

Intensitas curah hujan mempunyai peran yang penting bagi pertanian di Indonesia, terutama pada daerah-daerah potensial lahan kering. Penelitian ini bertujuan membangun sebuah sistem yang dapat memonitor curah hujan dan melaporkannya secara otomatis ke sebuah komputer server yang daoat diakses oleh setiap pihak yang  membutuhkan. Protoype sistem yang dibangun terdiri dari sensor ultrasonic dan minicomputer Raspberry Pi 3 mode B+ yang terhubung ke jaringan internet. Raspberry Pi mengakses sensor ultrasonic untuk membaca level ketinggian air pada wadah penampung curah hujan secara berkala, mengolahnya untuk mendapatkan data curah hujan dan menyimpan data tersebut dalam sebuah database. Sebuah server pusat bertugas untuk mengumpulkan data curah hujan dari setiap titik pengambilan sampel. Publik dan mengakses data sensing sdari tiap wilayah menggunakan teknologi website.
SIMULATION OF ENERGY CONSUMPTION IN MULTI CLUSTER WIRELESS SENSOR NETWORKS Pella, S. I.
Jurnal Media Elektro Vol 7, No 1 (2018): APRIL 2018
Publisher : Universitas Nusa Cendana

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Abstract

Energy conserving protocols in wireless sensor networks (WSNs), such as S-MAC, introduce multi-cluster network. The border nodes in multi cluster WSNs  have more active time than the other nodes in the network; hence have more energy depletion rate. Since battery replacement in most networks is considered difficult, one or more nodes running out of energy prematurely will affect the network connectivity and decrease the overall network performance severely. This paper aims to (1) analyze the energy consumption in a multi-cluster sensor network and compare it to the single cluster scenario (2) investigate the merging time in a single cluster network. The result shows that, in average the energy needed to deliver a packet in the multi cluster networks is about 150% more than the energy needed in the single cluster networks. Moreover, the merging time in the single cluster network  using schedule offset as the merging criteria in average is slightly smaller than one in the network using schedule ID as merging criteria.
ESTIMATING THE MAXIMUM SYNCHRONIZATION DRIFT IN SELF ORGANIZING WIRELESS SENSOR NETWORKS Pella, S. I.
Jurnal Media Elektro Vol 6, No 1 (2017): April 2017
Publisher : Universitas Nusa Cendana

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Abstract

The nodes in self-organizing wireless sensor networks (WSNs) do not have means for synchronizing their clock with a global reference. To maintain a local synchronization, the nodes to periodically propagate a small control packet called SYNC. The propagation delay suffered by the packet caused the synchronization drift in the network, which is proportional to the length of the propagation path. This paper aims to investigate ways to calculating the maximum synchronization drift that could happen in a network. We propose a method to theoretically calculate the upper bound of the maximum schedule drift in a network, which serve as the worst case scenario. We then run simulations to see the effect of network density and node’s transmission range to the maximum synchronization in the network for various network sizes. Finally, we propose  a way to estimate the maximum synchronization drift in a dense network.
Co-Authors Lami, H