scholarly journals Sistem Pemantauan Nirkabel dan Real Time Kualitas Air Sungai Muara Lembu Kuantan Singingi

2020 ◽  
Vol 1 (3) ◽  
pp. 116-125
Author(s):  
Yusnita Rahayu ◽  
Dian Yayan Sukma ◽  
Nurhalim Nurhalim
Keyword(s):  

Pencemaran lingkungan yang diakibatkan oleh pembuangan limbah cair pabrik kelapa sawit dapat menyebabkan ketidakseimbangan ekosistem. Tidak hanya bagi tumbuhan, dan hewan, namun pengaruh pencemaran tersebut menyebabkan gangguan kesehatan masyarakat sekitar. Kegiatan abdimas ini dilakukan di Desa Sungai Bawang tepatnya pada aliran sungai Muara Lembu. Untuk pemantauan kualitas mutu air, penulis merancang bangun sistem pemantauan berbasis nirkabel dan real time. Parameter berupa kekeruhan dan pH menjadi prioritas pengamatan untuk kegiatan abdimas ini. Bacaan kedua sensor ditampilkan pada papan informasi yang dibangun di depan kantor desa, untuk memudahkan aparatur dan masyarakat sekitar mengawasi kualitas mutu air sungai. Dari hasil pengamatan, air sungai bersifat asam karena mengandung pH berkisar 5,4–5,9, sementara untuk kadar kekeruhan pada tahap sedang dengan nilai berada di antara 125–205 NTU.

2020 ◽  
Vol 92 (1) ◽  
pp. 33-76
Author(s):  
Łukasz Kruk

Abstract Motivated by an application to resource sharing network modelling, we consider a problem of greedy maximization (i.e., maximization of the consecutive minima) of a vector in $${\mathbb {R}}^n$$ R n , with the admissible set indexed by the time parameter. The structure of the constraints depends on the underlying network topology. We investigate continuity and monotonicity of the resulting maximizers with respect to time. Our results have important consequences for fluid models of the corresponding networks which are optimal, in the appropriate sense, with respect to handling real-time transmission requests.


Author(s):  
Mario Perhinschi ◽  
Giampiero Campa ◽  
Marcello Napolitano ◽  
Marco Lando ◽  
Luca Massotti ◽  
...  

2010 ◽  
Vol 143-144 ◽  
pp. 576-579 ◽  
Author(s):  
Shu Xian Zhu ◽  
Bang Fu Wang ◽  
Xue Li Zhu ◽  
Sheng Hui Guo

PLC dynamically adjusts power voltage by controlling switches of transformers with different combinations, which is based on the theory of 8421, and makes voltage changes in a very small range. By using this system, energy is saved, and the damage of illumination equipment from voltage instability is greatly reduced, and the life of lamps is effectively extended. Meanwhile, by using the touch screen, this system not only can realize the real time parameter display, but also achieve the real time operation on the panel.


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