Design and Development of Co Gas Sensor Device From Indium Tin Oxide-based with Thin Coating Technology

In this paper it will be described the design and manufacturing of microdevice to be used as platform for Carbon monoxide (CO) gas sensor based on indium tin oxide (ITO). The device has been designed on silicon substrate with an active area of 3x3 mm2 , and consisted of bonding pad, heater, electrode, and temperature sensor components. The minimum feature size used is 50 microns, as allowed by the capability of photolithographic process. The formation of microdevice structure has been done mainly using lift-off technique on platinum (Pt) layer, which was deposited by DC sputtering with aluminium (Al) as sacrificial layer. The overall chip dimension is not more than 5x5 mm2. The measurement conducted to study the resistance versus temperature characteristics has shown that the heater and temperature sensor elements have functioned as expected, in which their resistances change linearly with an increase in substrate temperature between 20 – 200 oC. The range of increase in resistance values for the heater is 500 – 1000 ohm, whereas for the temperature sensor is 100 – 300 ohm

EVALUASI KEBUTUHAN AIR SIDE (RUNWAY), TAXIWAY DAN APRON DI BANDARA SYUKURAN AMINUDDIN AMIR LUWUK DI KABUPATEN BANGGAI, SULAWESI TENGAH

Perkembangan dunia Air Side di Indonesia ini semakin berkembang pesat. Khususnya Bandar Udara tentu membutuhkan pengembangan fasilitas dari sisi teknologi. Dalam pembangunan Bandar Udara Syukuran Aminuddin Amir ditingkatkan dengan pengembangan terus menerus. Penelitian ini untuk mengetahui kinerja landasan pacu (runway), taxiway dan apron pada Bandara Udara Syukuran Aminuddin Amir terhadap pertumbuhan penumpang, bagasi dan kargo yang masuk maupun keluar. Data yang yang diambil berupa data primer yaitu jumlah pesawat, jumlah penumpang, jumlah bagasi dan barang setiap tahunnya, data fasilitas dan kondisi Bandara Udara, dan data sekunder berupa referensi buku dan data dari pihak Bandara Udara. Analisis data dilakukan berdasarkan Metode Perancangan dan Pengembangan Bandara Udara yang dikeluarkan badan internasional yaitu ICAO (International Civil Aviation Organization) dan FAA (Federal Aviation Administration). Berdasarkan hasil pengamatan untuk 15 tahun mendatang didapatkan jumlah penumpang rerata per hari yaitu sebanyak 510 orang dengan jenis pesawat yang beroperasi masih sama, untuk kapasitas angkut penumpang rerata per hari didapatkan sebanyak 1.410 orang. Untuk perkiraan bagasi yang masuk atau pun datang sebesar 271.167 kg dan kapasitas angkut bagasi sebesar 644,949.76 kg. Dari hasil tersebut untuk kapasitas angkut penumpang didapatkan lebih besar dari jumlah penumpang rerata per hari, dan juga kapasitas angkut bagasi lebih besar dari perkiraan bagasi 15 tahun mendatang. Hal tersebut menunjukan bahwa Bandara Syukuran Aminuddin Amir dengan jenis pesawat yang sama masih belum dapat memenuhi kebutuhan angkut penumpang dan bagasi untuk 15 tahun mendatang. Demikian tingkat pelayanan landasan pacu (runway), taxiway dan apron masih aman untuk melayani 15 tahun mendatang. Namun , untuk mencegah kenaikan yang drastis pada 15 tahun mendatang dirancang ulang menggunakan pesawat besar yaitu B737-500. Dari berbagai koreksi terhadap runway, taxiway dan apron didapatkan kebutuhan dimensi runway untuk pesawat B737-500 sebesar 2819 m x 45 m, taxiway berukuran 60 m x 22,5 m dan dimensi apron sebesar 356 m x 124 m

Online Monitoring Kualitas Air Pada Budidaya Udang Berbasis WSN Dan IoT

Dalam tulisan ini dijelaskan desain dan pengembangan sistem online monitoring kualitas air berbasis wireless sensor Network (WSN) dan Internet of Things (IoT). Sistem ini didesain dan dikembangkan untuk memantau parameter DO (Dissolved Oxygen), pH, conductivity dan temperatur pada budidaya udang. Sistem terdiri dari beberapa node sensor dengan komponen utama arduino uno yang terhubung dengan Xbee board dan master board dengan komponen utamanya adalah Raspberry Pi 2 (RPi2) board dan Xbee. Data dikirim dari masing-masing node ke RPi2 menggunakan jaringan WSN dengan paket data yang dilengkapi dengan masing-masing ID, setelah itu data disimpan di database internal RPi2 dan ditampilkan di graph. Timer update server digunakan untuk update data dari RPi2 ke server menggunakan jaringan internet melalui wifi. Data di server dapat dilihat menggunakan website, selain itu juga data dapat dilihat pada aplikasi Telegram Messenger yang ter-install di perangkat ponsel. Program RPi2 dikembangkan menggunakan bahasa python dan komponen matplotlib. Hasil percobaan menunjukkan bahwa sistem memiliki prospek yang besar dan dapat digunakan untuk keperluan budidaya udang dengan memberikan informasi yang relevan dan tepat waktu. Data hasil pengumpulan tersebut dapat digunakan untuk penelitian dan analisa lebih lanjut

Developing Marketing Strategy Of Nasatech Kitchen Set Malang To Enter A New Market In USA

Nasatech is a company that produces kitchen cabinets from granite materials. Nasatech has been almost ten years in the city of Malang, Indonesia. So far, Nasatech only serve consumers who live in Malang and surrounding areas. However, Nasatech has a commitment to be able to market its products abroad if there is a chance. The excellence of Nasatech is its unique product and Nasatech has already used to use internet marketing to market its products and conduct online transactions. Some research data show that furniture and kitchen countertops from granite materials are becoming a trend in the US so Nasatech is very suitable to market its products in the US. Nasatech needs to make some patent designs for its products with knock-down system so it is more easily shipped and marketed to the US through furniture importers in the US who can become a distributor. Internet marketing can be a good marketing strategy to enter the US market as online furniture purchase transactions increase significantly in the US. This is expected to be a good opportunity for Nasatech to enter the US market

Modeling of SOI-based MRR by Coupled Mode Theory using Lateral Coupling Configuration

We present the modeling of a first order waveguide-coupled microring resonator (MRR) by coupled mode theory (CMT) using transfer matrix model. The design topology is based on the lateral coupling configuration and single mode propagation which is integrated on a Silicon-on-Insulator (SOI) platform. Performance parameters including Free Spectral Range (FSR) and Quality Factor (Q-factor) are investigated. For verification, we compare these results with the results obtained from the Finite Difference Time Domain (FDTD) commercially available software. We found that both results agree well with each other

PENGARUH KANDUNGAN Co TERHADAP SIFAT OPTIK FILM TIPIS TiO2-Co YANG DITUMBUHKAN DENGAN METODE MOCVD

PENGARUH KANDUNGAN Co TERHADAP SIFAT OPTIK FILM TIPIS TiO2-Co YANG DITUMBUHKAN DENGAN METODE MOCVD. Film tipis TiO2-Co telah ditumbuhkan di atas substrat Si (100) tipe-n dengan metode metalorganic Chemical Vapor Deposition (MOCVD), menggunakan Titanium (IV) isopropoxide (Ti(OCH(CH3)2)4 dan tris (2,2,6,6-tetra methyl-3, 5-heptanedionato) cobalt (III) [Co(TMHD)3), masing-masing dengan kemurnian 99,99% dan 99% sebagai prekursor metal organik. Tetrahydrofuron (THF) digunakan sebagai pelarut bahan prekursor. Sifat optik dari filmtipis TiO2-Co sebagai fungsi dari kandungan Co telah diinvestigasi menggunakan metode spektroskopi reflektansi pada rentang 200 nm hingga 2400 nm. Hasil karakterisasi secara optik menunjukkan bahwa bertambahnya konsentrasi Co akan menurunkan energi band-gap (Eg) dan indek bias (n) dari film tipis TiO2-Co tersebut. Kurva histeresis yang diperoleh melalui pengukuran VSMmemiliki nilai koersivitas dan saturasi magnetik, masing-masing sebesar 100 Oe dan 280 emu/cm3. Sehingga dapat disimpulkan bahwa film tipis yang dihasilkan pada penelitian ini bersifat soft ferromagnetic, yang sangat potensial untuk diaplikasikan dalam teknologi spintronik

Design and optimization of coupled microring resonators (MRRs) in silicon-on-insulator

The design of microring resonators (MRRs) for serial configuration, integrated in the lateral scheme was presented and simulated using 3D electromagnetic simulator based on finite integration technique. The device model is embedded on the high index contrast (HIC) structure of silicon-on-insulator with monomodal cavity for TE-mode polarizations. From the proposed model, we varied the MRRs order, waveguides separation distance and ring radius, in order to evaluate the influence of those parameters on the device performance in terms of loss, free spectral range (FSR) and quality factor (Q-factor). Upon varying the gap distances, it was found that the highest Q-factor value of the proposed design was 1275 obtained at gap separation of 150 nm for ring radius of 6 μm, while the largest FSR was 24 nm. The trade-offs between device compactness, optical bandwidth and Q-factor are also presented

Validity, reliability, and reproducibility of linear measurements on digital models obtained from intraoral and cone-beam computed tomography scans of alginate impressions

<p>Introduction: Digital 3-dimensional models are widely used for orthodontic diagnosis. The aim of this study was to assess the validity, reliability, and reproducibility of digital models obtained from the Lava Chairside Oral scanner (3M ESPE, Seefeld, Germany) and cone-beam computed tomography scans of alginate impressions for tooth-width measurements and the Bolton analysis. Methods: A digital model, an intraoral scan, and a plaster model were made for each of 22 subjects. Tooth-width measurements on the digital model and the intraoral scan were compared with those on the corresponding plaster models (gold standard). Intraclass correlation coefficients were calculated to determine the interexaminer reliability of the measurements of each method. The anterior and overall Bolton ratios were calculated for each participant and for each method. The paired t test was used to determine the validity. The scanning time for the intraoral scanner was registered and analyzed. Results: Tooth-width measurements of each tooth on the digital models and the intraoral scans did not differ significantly from those on the plaster models (P >0.05). The overall and anterior Bolton ratios from the 2 types of digital models differed significantly from the gold standard (P</p>

Design and Optimization of Coupled Microring Resonators (MRRs) in Silicon-on-Insulator

The design of microring resonators (MRRs) for serial configuration, integrated in the lateral scheme was presented and simulated using 3D electromagnetic simulator based on finite integration technique. The device model is embedded on the high index contrast (HIC) structure of silicon-on-insulator with monomodal cavity for TE-mode polarizations. From the proposed model, we varied the MRRs order, waveguides separation distance and ring radius, in order to evaluate the influence of those parameters on the device performance in terms of loss, free spectral range (FSR) and quality factor (Q-factor). Upon varying the gap distances, it was found that the highest Q-factor value of the proposed design was 1275 obtained at gap separation of 150 nm for ring radius of 6 μm, while the largest FSR was 24 nm. The trade-offs between device compactness, optical bandwidth and Q-factor are also presented