This research analyzes the performance of LED lights installed on Pattimura street, which are in front of PW building, in front of Al-Azhar building, and in front of house compounds, and on Satrio street, which are in front of and across CityWalk Mall and across Ciputra World I building. The testing is done by measuring the illuminance (the unit is lux) with luxmeter on the measurement zone which has certain measurement points. The LED lights on Pattimura street have power of 237 watt, light distance of 50 meter, pole height of 9 meter, and street width of 6.9 meter. The testing result shows that the lighting on street surface is SNI compliant, which means the LED light can be used for street lighting. But there is high illuminance on measuring point which is perpendicular to light and it means light pollution. On the contrary the illuminance decreases significantly on the zone between the light pole and it is not SNI compliant. For this reason, the distance between light pole and the light power should be decreased. The result also has the isolux drawing and it is designed with Dialux software. The branches of trees on both streets cover the light so that the illuminance of street surface decreases. And this matter should be handled by DKI Jakarta government.
Abstract. The presence of road lighting helps a car driver to identify nearby cars. The availability of road lighting can also reduce the occurrence of security disturbances however it has not been considered as the cause of accident. A study was conducted to analyze the visual perception of car drivers toward the road lighting. The research was conducted on Cikampek and Cipularang freeways which include straight and curved road sections. Data collection was conducted using questionnaires as the measurements instrument by asking the participants to watch the video footage of the freeway. The results show that the car drivers feel safer and more clarity in identifying the traffic signs and road marking in the presence of road lighting. Furthermore, yellowish road lighting provides more visual safety perception than white lighting which opposed with other previous studies. This result was obtained from the existing condition in the questionnaires without any control variable.
Baby incubator is very important to keep the newborn’s body temperature especially for premature babies. Premature babies is the babies that born less than 37 weeks and has less than 2500 grams body weight. Baby incubator is designed to have a lenght of 70 cm, a width of 40 cm, and a height of 60 cm. The system of baby incubator will automatically turn on or turn off the fan, heater or humidifier in accordance with the range of temperature and humidifier that has been set. The range of humidifier inside the baby incubator is 40% - 60%. The range of temperature can be set in a Graphical User Interface (GUI). At GUI, user can fill and show babies profile, babies activity, level of baby’s bilirubin, and the range of temperature. Those Datas are saved in a database’s tables. GUI can show the temperature and humidity of babies incubator in form of graph. Babies monitoring can be done by wireless. There is a monitoring device that can buzz if the baby is crying. This system has a database that can store incubator room temperature-humidity data, baby’s temperature, sound counters, biodata, activity, bilirubin and incubator temperature regulation. Can also provide information about the incubator's humidity and baby's temperature on the LCD and GUI and can save the record of the activities carried out by the baby, as well as keep a record of the baby's bilirubin value and turn on the lights automatically according to the bilirubin value inputABSTRAK:Inkubator bayi sangat berperan penting untuk menjaga suhu tubuh bayi baru lahir khususnya bagi bayi prematur. Bayi prematur adalah bayi yang lahir kurang dari 37 minggu dan memiliki berat badan kurang dari 2500 gram. Inkubator bayi yang dirancang memiliki ukuran ruang panjang 70 cm, lebar 40 cm, dan tinggi 60 cm. Sistem dari inkubator bayi ini akan secara otomatis menyalakan atau mematikan kipas, heater atau humidifier sesuai dengan batas suhu dan kelembaban yang telah diatur. Batas kelembaban udara di dalam inkubator bayi adalah sebesar 40% sampai 60%. Batas suhu inkubator bayi diatur sesuai dengan umur dan berat badan bayi. Pengaturan batas suhu inkubator bayi dapat diatur pada sebuah Graphical User Interface (GUI). Pada GUI, pengguna dapat mengisi dan menampilkan biodata bayi, aktivitas bayi, tingkat bilirubin bayi dan batas suhu inkubator yang diinginkan. Data-data tersebut disimpan pada tabel-tabel yang berada pada sebuah basis data. GUI juga dapat menampilkan suhu dan kelembaban inkubator bayi dalam bentuk grafik. Pemantauan bayi dapat dilakukan secara wireless. Terdapat sebuah alat pemantau yang akan berbunyi apabila bayi menangis. Sistem ini memiliki database yang dapat menyimpan data suhu-kelembaban ruang inkubator, suhu tubuh, counter suara, biodata, aktivitas, bilirubin dan pengaturan temperatur inkubator. Juga dapat memberikan informasi mengenai suhu-kelembaban inkubator dan suhu tubuh bayi pada LCD dan GUI dan dapat menyimpan record aktivitas yang dilakukan bayi, serta menyimpan record nilai bilirubin bayi dan menyalakan lampu secara otomatis sesuai dengan nilai bilirubin yang di-input.
Demand of higher data speed communication must be supported by good system and precise Evolved Node B allocation to give a good service quality. In the future especially Indonesia telecommunication network keep growing, data traffic with effective perfomance keep developed by mobile operator (service provider). Mobile telecomunication networking need cell planning with aim to meet cell coverage which is showed by number of base station, with minimal allocation but can meet the requirement of traffic capacity and coverage area.Chance to develope Long Term Evolution (LTE) Technology is at frequenies 1200 MHz, 1800 MHz, 2100 MHz and 2300 MHz. eNode B Allocation uses genetic algorithm and evolutionary programming. In Genetic Algorithm and evolutionary programming, searching technique is done by analyzing the size of the the population. Individual in one population is called by the term of chromosome. This chromosome is one of solution in the shape of symbol. In the beginning, population developed randomly, next population will be result of chromosomes evolution by iteration which is called by the term of generation. This eNode B allocation generates the best cell radius, observed by number of generations and eNode B allocation uses by using genetic algorithm and evolutionary programming which generate same cell radius.
A sound level meter is an instrument used for measuring noise or disturbing sound in a certain environment. A sound level meter needs to be calibrated to determine the accuracy. The purpose of calibrating the sound level meter is to solve the problem of inequality of measurement results when measuring using the instrument. Calibration of the sound level is focused on the calibration of the Band Pass Filter with a frequency range of 63 Hz - 8000 Hz with several measuring points, namely 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz and 8000 Hz based on ISO / IEC 61672-3: 2017. In this research, a tool to calibrate the sound level meter is designed which can work automatically without moving the measuring point selector. This tool uses a processing module, a Wi-Fi module, a dashboard on a laptop and a Band Pass Filter module. The overall system test results show the accuracy level of BPF module output frequencies above 99%, the measuring point 125 Hz - 8000 Hz which is in accordance with ISO / IEC standards, and the highest Sound level meter adalah alat ukur kebisingan atau bunyi yang mengganggu pada suatu lingkungan tertentu. Sound level meter perlu dikalibrasi untuk mengetahui ketelitian dari alat ukur tersebut. Tujuan dari kalibarasi sound level meter adalah untuk mengatasi permasalahan ketidaksamaan hasil pengukuran ketika mengukur menggunakan alat ukur tersebut. Kalibrasi pada sound level difokuskan pada kalibrasi Band Pass Filter dengan rentang frekuensi 63 Hz – 8000 Hz dengan beberapa titik ukur yaitu 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz dan 8000 Hz berdasarkan ISO/IEC 61672-3:2017. Pada penelitian ini dirancang suatu alat untuk mengalibrasi sound level meter yang dapat bekerja secara otomatis tanpa menggerakkan selektor titik ukur. Alat yang dirancang menggunakan modul pemroses, modul Wi-Fi, dashboard pada laptop dan modul Band Pass Filter. Hasil pengujian sistem secara keseluruhan menunjukkan tingkat akurasi frekuensi output modul BPF diatas 99%, titik ukur 125 Hz - 8000 Hz yang sudah sesuai standar ISO/IEC, dan nilai perbandingan LAF dan LCF tertinggi berada pada frekuensi 63 Hz yaitu sebesar 4,86% untuk LAF dan 4,39 % untuk LCF.
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