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RANCANG BANGUN SISTEM MONITORING KUALITAS UDARA MENGGUNAKAN TEKNOLOGI WIRELESS SENSOR NETWORK (WSN) Erwin, Iwan Muhammad; Sugiarto, Bambang; Sakti, Indra
INKOM Journal Vol 3, No 1-2 (2009)
Publisher : Pusat Penelitian Informatika - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/j.inkom.45

Abstract

Untuk mengetahui kualitas udara di suatu wilayah secara online maka perlu dibangun suatu sistem monitoring kualitas udara. Di sini akan dijelaskan suatu rancang bangun sistem monitoring kualitas udara menggunakan teknologi  Wireless Sensor Network (WSN).  Pada dasarnya suatu WSN terbentuk dari tiga komponen utama yaitu target, node sensor, dan base station. WSN merupakan jaringan nirkabel yang terdiri dari beberapa autonomous device yang di dalamnya terpasang sensor-sensor yang secara terpadu membaca kondisi fisik lingkungan. Setiap node sensor yang dipasang di berbagai tempat akan selalu mengirimkan data ke gateway. Dari gateway ini data ditransfer dan disimpan ke PC (Personal Computer). Selanjutnya data akan diproses hingga menjadi informasi yang dapat digunakan oleh user atau masyarakat umum. Sistem yang dibangun menggunakan komunikasi zigbee, terdiri atas satu buah node koordinator merangkap gateway, 4 node sensor sebagai end-device dan satu base station controller (BSC). Parameter udara yang diukur yaitu karbonmonoksida (CO), karbondiksiada (CO2), suhu dan kelembaban udara.Kata kunci: base station controler, end-device, gateway, koordinator, kualitas udara, monitoring, wireless sensor network, zigbee
KETERAMPILAN METAKOGNITIF MAHASISWA DALAM MENERAPKAN TEORI VSEPR PADA PENYELESAIAN MASALAH BENTUK MOLEKUL DAN SUDUT IKATAN SUGIARTO, BAMBANG; , PRABOWO; , SUYONO
Jurnal Penelitian Pendidikan Matematika dan Sains Vol 19, No 1 (2012): Vol. 19, No. 1, Juni 2012
Publisher : Jurnal Penelitian Pendidikan Matematika dan Sains

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Abstract

Abstrak. Tujuan penelitian ini adalah untuk mengetahui keterampilan metakognitif mahasiswa dalam menerapkan Teori VSEPR (valence shell electron pair repulsion) pada penyelesaian masalah bentuk molekul dan sudut ikatan berdasarkan dimensi planning, monitoring, dan  reflection. Sebagai subyek adalah mahasiswa yang memprogram mata kuliah ikatan kimia dengan instrumen utama adalah peneliti sendiri (human instrument) yang didukung alat bantu audio recorder, handycam, dan buku catatan lapangan. Untuk mengetahui keterampilan metakognitif digunakan teknik analisis dokumen mahasiswa berupa jawaban tertulis dan wawancara mendalam. Uji kredibilitas terhadap data dilakukan dengan menggunakan teknik triangulasi metode dan sumber.  Temuan penelitian menunjukkan, bahwa keterampilan metakognitif pada dimensi  1) planning, tidak hanya dilakukan pada tahap analisis masalah dan rencana saja, tetapi juga dilakukan pada tahap penyelesaian masalah. Aktivitas pada tahap penyelesaian masalah ini hanya dilakukan oleh kelompok atas berupa menetapkan hasil antara yang dapat dicapai, 2) monitoring, dilakukan oleh kelompok atas, tengah, dan bawah pada tahap penyelesaian masalah. dan 3) reflection dilakukan oleh kelompok atas dan tengah pada tahap penilaian, sedang kelompok bawah tidak melakukan refleksi. Pada setiap tahap penyelesaian masalah, keterampilan metakognitif yang dilakukan oleh subyek kelompok atas lebih mendasar, lebih cermat, dan lebih teliti.                                               Kata kunci: Keterampilan Metakognitif, Penyelesaian Masalah, Teori VSEPR Abstract. The purpose of this study was to determine the students’ metacognitive skills in problem solving by using VSEPR (Valence Shell Electron Pair Repulsion) Theory based on planning, monitoring, and reflection dimensions. The subjects were students who followed the course of chemical bonds with the main instrument was the researchers (as human instrument). with supported by audio recorders, camcorders, and field notebooks. To check the validity of the data, this research used triangulation of method and sources. The results showed that in dimension 1) planning, not only performed at the phase of problem analysis and plan, but also performed on the phase of problem solving. Activity at problem solving phase is only done by the upper group in the form of the temporary result that can be achieved, 2) monitoring, performed by upper, middle, and lower groups in the problem-solving phase. and 3) reflection, performed by the upper and middle groups in the assessment phase. At each phase of problem solving,  metacognitive skills  that performed by upper group subjects more basicaly, more accurately, and more thoroughly. Key words: Metacognitive Skills, Problem Solving, VSEPR Theory   
PERUBAHAN PREHEAT ZONE THICKNESS DAN BILANGAN KARLOVITZ PADA FENOMENA FLAME LIFT-UP PEMBAKARAN PREMIX GAS PROPANA Dhiputra, I Made Kartika; Sugiarto, Bambang; Nugroho, Yulianto S.; Mahandari, Cokorda Prapti
Jurnal Teknik Mesin Vol 11, No 1 (2009): APRIL 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (218.262 KB) | DOI: 10.9744/jtm.11.1.pp. 46-52

Abstract

It has been found a phenomenon of flame lift-up on the experiment employing a Bunsen burner. Flame lift-up is the occurrence of flame jumping from the tip burner to the ring that inserting above the burner. Fundamental research on flames did not elaborate the cause of flame jumping. Using flame stretch approach, an initial research on dimensionless number to predict the occasion of this phenomenon was discussed to determine preheat zone thickness and Karlovitz number. Preheat zone thickness was calculated based on temperature distribution of flame axes. Karlovitz number was determined from preheat zone thickness, burning velocity and stretch rate. The occurrence of flame lift-up was less then a second. Therefore the two parameters will be evaluated on two different conditions which are just before and just after lift-up happened. It was found that after lift-up, preheat zone thickness and burning velocity decreased. Karlovitz number just before and after lift-up occurred is about 2.5. This number can be considered as the initial prediction that flame lift-up will be appeared on Karlovitz number 2.5. Abstract in Bahasa Indonesia: Fenomena lompatan nyala api atau flame lift-up ditemukan pada penelitian menggunakan burner Bunsen. Flame lift-up adalah kejadian melompatnya nyala dari ujung burner ke ring yang berada di atas ujung burner. Penelitian dasar tentang nyala api belum banyak membahas penyebab melompatnya nyala api. Dengan pendekatan konsep regangan nyala, kajian awal untuk menentukan bilangan tanpa dimensi penyebab munculnya fenomena ini dibahas dengan menentukan perubahan preheat zone thickness kemudian Bilangan Karlovitz. Preheat zone thickness ditentukan berdasarkan gradien maksimum dari distribusi temperatur pada sumbu nyala. Sedangkan Bilangan Karlovitz dihitung berdasarkan preheat zone thickness, kecepatan nyala dan laju regangan nyala. Peristiwa melompatnya nyala api yang hanya sesaat dianalisis dengan membandingkan kedua parameter pada dua kondisi yakni sesaat sebelum lift-up dan sesaat setelah terjadinya lift-up. Hasil penelitian menunjukkan bahwa ketebalan daerah pemanasan awal dan kecepatan nyala laminar setelah lift-up menurun sedangkan Bilangan Karlovitz sebelum dan setelah lift-up cenderung tetap yakni sekitar 2.5. Nilai ini dapat dijadikan prediksi awal bahwa lompatan nyala api akan terjadi pada Bilangan Karlovitz 2.5. Kata kunci: Lift-up, preheat zone thickness, karlovitz number.
PERANCANGAN DAN REALISASI PURWARUPA SISTEM MONITORING AREA PARKIR MOBIL DENGAN MENGGUNAKAN ULTRASONIK DAN LIGHT DEPENDENT RESISTOR Sarief, Ivany; Merdeka Putri, Wulandari Pancadasa; Sugiarto, Bambang
Jurnal Teknologi Informasi dan Elektronika (INFOTRONIK) Vol 3, No 1 (2018)
Publisher : Universitas Sangga Buana

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Abstract

Kebanyakan fasilitas parkir yang digunakan saat ini tidak memberikan informasi yang menandakan bahwa slot parkir yang tersedia sudah penuh. Hal ini membuat pengguna jasa parkir terutama pengendara kendaraan roda 4 (mobil) membutuhkan waktu lebih dari 10 menit untuk menemukan tempat parkir yang tersedia. Berdasarkan hal tersebut, dirancang sebuah purwarupa sistem untuk mempermudah pengendara mobil yang hendak menggunakan jasa parkir dengan cara membuka dan menutup palang pintu parkir secara otomatis, serta memberikan informasi slot parkir yang masih tersedia. Pada sistem ini, proses pengambilan data dilakukan oleh mikrokontroler yang bertindak sebagai komponen kendali utama. Pengujian dilakukan melalui sebuah purwarupa miniatur perparkiran. Purwarupa menggunakan sensor ultrasonik untuk mengaktifkan palang pintu, motor servo sebagai penggerak palang pintu masuk dan palang pintu keluar, dan sensor Light Dependent Resistor (LDR) mendeteksi keberadaan mobil pada slot parkir. LDR ditempatkan dilantai pada setiap bidang slot parkir. Ketika ada benda diatas LDR maka cahaya akan tertutup sehingga LDR mendeteksi benda dan mengirim data pada mikrokontroler, yang akan mendefinisikan bahwa tempat tadi sudah diisi kendaraan dan menampilkan keluaran di Personal Computer (PC) bahwa slot parkir sudah penuh atau belum. Hasil pengujian sistem perparkiran dapat menampilkan kondisi masing-masing area parkir di PC dengan menggunakan aplikasi visual basic sebagai penampilnya. Portal masuk tidak dapat terbuka jika semua slot parkir telah terisi dan buzzer akan berbunyi sebagai tanda alarm.Kata kunci: slot parkir, mikrokontroler ,ultrasonik, LDR, buzzer
Fuel Injection System for One Cylinder Motor Cycle Engine Sugiarto, Bambang
Makara Journal of Technology Vol 8, No 3 (2004)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.31 KB) | DOI: 10.7454/mst.v8i3.88

Abstract

Fuel injection has been developed for many years. But its common application is limited on cars engine. With many reason fuel injection systems in motorcycle one cylinder engine has not been widely used yet. Fuel Injection System allows the amount of fuel, injected to be controlled appropriate to engine parameters such as engine speed, amount of air inducted to cylinder, temperature, for each cycle, over the entire engine operating conditions. This fuel injection research is done to find out the Volumetric Efficiency of the intake manifold system, the amount of fuel need to be injected for each engine cycle, and the engine characteristics over variation of test conditions. This research based on Honda CB100 engine, at applied thermodynamic Laboratory of Mechanical Engineering Department, Faculty of Engineering University of Indonesia. Experiment data from this research shows the characteristics of injector duration as functions of engine speed, intake pressure, on one cylinder engine and the results of this research shows a good Volumetric Efficiency of the intake manifold designed using CFD (Computational Fluid Dynamic).
Effects Of 0.25 % Mo (Molybdenum) Which Is Contained In The Ductile Cast Iron On Mechanical Properties Of Austempered Ductile Iron (ADI). Nukman, Nukman; Arifin, Bustanul; Sugiarto, Bambang
Makara Journal of Technology Vol 6, No 1 (2002)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1557.947 KB) | DOI: 10.7454/mst.v6i1.42

Abstract

The aim of this research is to investigate the effects of 0.25 % Mo (Molybdenum) which is contained in the ductile cast iron on mechanical properties of Austempered Ductile Iron (ADI). The various temperatures and the holding times are used in the heat treatment processes. Using a given 0.25 % Mo in the ductile iron, ADIs alloyed developes a higher ultimate tensile stress value and decreases the elongation if we compare with the as cast (non alloy ductile iron). The higher impact energy value obtained at 9000 C austenization and 375o C austempering temperatures during 60 minutes holding times. The structure changes into ausferrit.
EFEK KOMPOSISI BIODIESEL TERHADAP PARAMETER KUALITAS BAHAN BAKAR DAN UNJUK KERJA MESIN (PERBANDINGAN BIODIESEL SAWIT DENGAN BIODIESEL JARAK CASTOR) Fajar, Rizqon; Suryantoro, Taufik; Sugiarto, Bambang; Setiawan, Frans
MESIN Vol 8, No 1 (2006)
Publisher : Program Studi Teknik Mesin, Universitas Trisakti

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Abstract

Biodiesel is the mono alkyl esters oflong chain fatty acids derivedfrom renewable lipid sources.Biodiesel as asubstitute ofpetroleum dieselfuel has some advantages: itproduces cleaner exhaust gas, betterin lubrication, and doesnt need engine modification. This paper presents the results ofresearch concerningthe effect ofdifferentfatty acid composition ofbiodiesel onfuel quality and its performance in diesel engine.For this purpose three different fuel sample were tested, Indonesian diesel fuel (solar) as a reference,blending solar 70%- oil palm methyl ester 30%(B-3 sawit) and blending ofsolar 70%- castor methylester 30 %(B-30 castor) . All ofthese fuels are tested using Hydra diesel engine, single cylinder indirectinjection (IDI). The test results shows that the performance (peak pressure in the cylinder) ofthreefuels arequite similar, however the two biodiesel blends show lower emission in smoke, hydrocarbon, and CO atdifferent injection timings and different loads. For NOx emission, it is slightly higher. B-30 castor containsmore unsaturatedfatty acids than B-30 sawit and therefore produced higher emission bfNOx. Beside, castormethyl ester contains an extra hydroxyl group in ricinoleic acid that probably leads to lower smoke andhydrocarbon compared to B-30 sawit. It is still aquestion that CO emission ofB-30 castor higher than ofB-30sawit. Research in the effect of chemistry andfatty acid composistionof biodiesel on the emission areneeded to be able describe mechanism ofCO, hydrocarbon andNOxformationfrom biodiesel.
Pengembangan Pemanfaatan Pengolahan Air Dalam Upaya Pemenuhan Kebutuhan Air di Dusun Temuireng, Desa Girisuko, Panggang, Gunungkidul Sugiarto, Bambang
Eksergi Vol 14, No 2 (2017): Eksergi Volume 14 No 2 2017
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

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Abstract

Air merupakan kebutuhan penting bagi hajat hidup warga di Kabupaten Gunung Kidul, Daerah Istimewa Yogyakarta. Temuireng merupakan salah satu desa di kecamatan Panggang, Kabupaten Gunung kidul, yang kebutuhan airnya masih jauh dari cukup. Di desa ini terdapat 269 kepala keluarga dengan rata-rata 4 jiwa di setiap kepala keluarga, sehingga terdapat kurang lebih 1076 jiwa yang kebutuhan airnya masih belum terpenuhi. Air untuk suplai ke desa ini terkendala oleh kemampuan pemompaan dan kualitas air baku. Kualitas air baku dimusim  curah hujan tinggi yang berasal dari Baron maupun gua Ngobaran masih mengandung bakteri E-Coli 9000 per 100 ml sedang total bakteri Coliform 28000 per 100 ml. Dari analisa air dimusim curah hujan sedang total coliform 4000 per 100 ml, dan analisa air dimusim curah hujan rendah (kemarau) total coliform berkisar 400 per 100 ml. Dari persyaratan maksimum 50 per 100 ml. Material terjerap dalam media karst saling berkaitan, antara bahan organik (parameter coliform) dan anorganik (parameter TDS). Dengan proses pengolahan secara laboratorium yang melibatkan proses flokulasi, sedimentasi, untuk dosis tawas, PAC dan biji Kelor sebesar 0,5 – 1 ppm mampu menurunkan TDS dari kisaran 262-288 ppm menjadi dibawah 200 ppm, dan jika dilanjutkan dengan filtrasi dengan media filter zeolit mampu menurunkan TDS hingga dibawah 180 ppm dalam waktu pengendapan 30 menit. Dan untuk dosis kelor jika dilanjutkan dengan perlakuan filter karbon mampu menurunkan TDS hingga dibawah 160 ppm dalam waktu filtrasi 30-60 menit. Sedang untuk proses olahan dengan destilasi percik tenaga surya, dimungkinkan terjadi penurunan TDS maupun coliform namun diperlukan intensitas sinar matahari yang cukup tinggi untuk proses penguapan.ABSTRACT: Water is an important resource for the people in Gunung Kidul Regency, Special Region of Yogyakarta, Indonesia. Water scarcity is one of big issue in Temuireng, one of panggang’s district in the Gunung Kidul regency. There is 269 family living in this villge and every family consist of four person so there are approximately 1076 person who need the clean water. The clean water supply for this village constrained by pump power and raw water quality. Raw water quality in rainy season (high rainfall intensity) contains of E-Coli 9000 per 100 ml and total Coliform bacteri 28000 per 100 ml. Raw water quality in medium rainfall intensity season contains of total Coliform  4000 per 100 ml and raw water quality in summer season (low rainfall intensity) contains of total Coliform  400 per 100 ml, from maximum regulation 50 per 100 ml. Material absorbed in karst include organic (coliform parameter) and anorganic (TDS parameter), which related in each other, can contaminate the water. Flocculation and sedimentation using 0.5-1 ppm doses of alum, PAC and kelor are performed to purify the water. The coagulant can decrease TDS parameter from 262-288 ppm to under 200 ppm, and if this process continued with filtration (filter zeolit), it can decrease TDS parameter to under 180 ppm in 30 minute. If the process continued by filtration process (carbon filter) using kelor, it can decrease TDS parameter to under 160ppm in 30-60 minute. Using spark destilation solar energy process can decrease TDS parameter and coliform bacteria, but this process need high sunlight intensity for evaporation.
PERANCANGAN SISTEM PENGENDALIAN SUHU PADA GEDUNG BERTINGKAT DENGAN TEKNOLOGI WIRELESS SENSOR NETWORK Sugiarto, Bambang
Jurnal Energi Dan Manufaktur Vol 4, No.1 April 2010
Publisher : Department of Mechanical Engineering, University of Udayana

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Abstract

At the building, for example the office building, hotels or the apartment, is needed by a controlsystem of the temperature. This is caused the number of rooms so it is difficult to monitor the use ofAir Conditioning (AC) for each room. This control system is used to monitor the temperature ofeach room so as to be able to control the use of AC. This paper will discuss the designing of controltemperature by using technology of Wireless Sensor Network (WSN). WSN technology made use ofthe Zigbee wireless network as the data communication, where each room was installed by atemperature sensor (the node sensor). The node sensor that is installed in each room are connectedwith each other and make the star, the tree or mesh network formation. The advantages of thissystem is using Zigbee wireless that is free of the licence. The results of the temperaturemonitoring of each node sensor are afterwards gathered in the Base Stasion Controller (BSC) thatbecame the centre of managing and processing the data, so as to be formed a control system of thetemperature of each room to this building.
Identifikasi Objek Bawah Permukaan Menggunakan Metode Ground Penetrating Radar di Kompleks Candi Kedaton, Muarojambi, Indonesia Sugiarto, Bambang; Lucki Junursyah, G.M; Pratomo, Indyo
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 4 (2018): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Ground Penetrating Radar (GPR) survey using 200 MHz frequency antenna have been conducted in July 2011 at Kedaton Temple Complex, Muarojambi, Jambi, Indonesia. The survey is aimed at providing subsurface information without digging (excavation) as in usual  conventional archaeological methods. The data were collected on six lines around the main building and a courtyard inside the boundary fence of Kedaton Temple Complex. Good quality data were obtained with signal to noise ratio greater than 110 dB. The result of the subsurface model based on the electromagnetic properties of rocks generating three layers of soil, from the youngest are Layer A with a thickness of 0.26 meters to 0.78 meters, Layer B with a thickness up to 1.51 meters, and Layer C coveringthe indication of archaeological object with a thickness of 0.35 meters up to 3.87 meters. The southern part of the main building showsa delineation and spread of thick layers of soil with a total thickness up to 4.50 meters, while the northern part of ancillary buildings shows a delineation and thin layers of soil with a total thickness only 2.60 meters. The indication of archaeological objects in the sub-surface indicated by the presence of anomalous heights which has a depth varying from 1.65 meters to 4.50 meters. This is interpreted to be a sub-surface anomaly that is likely to be archaeological objects still buried. The archaeological object may represent an ancient building in the zone of depression that accumulates due to the great floods, tidal Batanghari River, and sea level fluctuation in the past.Keywords: Archaeology, geophysics, Ground Penetrating Radar (GPR), Kedaton, Muarojambi.