The radar network system requires high-cost frequency, the complex configuration component of the electromagnetic feeding network circuit to make four output antenna with the same power and different phase output specifically for SIL (Self Injection Locked) Radar, and inexpensive material, especially for the electromagnetic component. 2.4 GHz Square Ring Patch with Ring Slot Microstrip Antenna with four output that has the same power using power divider and 90-degree phase different output for SIL Radar. this is the novel shaped microstrip Antenna with the free frequency, more unassuming configuration, and inexpensive material at the 2.4 GHz for SIL Radar. This system is an important part component of SIL Radar that is package consists of a 2.4 GHz Microstrip antenna with the Square Ring Patch with Ring Slot, double power divider which is double input with quad output with the same power and directional coupler 90-degree phase difference with two input and two output. The Antenna has single band and narrow bandwidth with the frequency is 2.38 GHz until 2.43 GHz under -10dB S parameter and frequency resonance 2.4 GHz, the radiation pattern is directional and the gain is 8.37 dBi, The Power divider has S parameter 2 port output of one part under -20dB at 2.4 GHz and isolation above -4dB that is all good agreement. The 90-degree hybrid coupler has S35 of -35.95dB, S46 of 35.09, S53 of -3.47, and S64 of -3.39 that all is qualified good operation. And size all of the indicate antenna systems is 100 mm and 55.7 mm with Phenolic White Paper with a constant dielectric is 4.4 that has 50 ohms.Index Terms-Microstrip antenna,SIL Radar, Square Ring patch.
A laser is a light source that uses for any kinds of medical application. Diode Laser is one laser type using in the medical application such as Photodynamic Therapy and Photodynamic inactivation. Photodynamic Therapy is one of non-invasive therapy using for many therapies such as antimicrobial therapy, rejuvenating skin therapy, anti-aging skin therapy, etc. This therapy is using a light source with specific characteristics of wavelength in some case are using Light-sensitive molecules. This research aims to determine the potential of the diode laser for photodynamic therapy instrument. Diode Laser with wavelength value 660nm is Red Laser Diode that has main power output 79,4 mW. The application was using 1 cm clearance with the 30s of time exposure. The result showed that for Diode Laser (λ) 660nm using 7,8x10 -2 W input power produce 77,78 mW output power; has operational temperature 53.56 o C and light beam 4.2 mm 2 .
Pada perkembangan teknologi saat ini banyak dikembangkan jenis robot dengan kemampuan yang menarik adalah robot dengan pengendali suara manusia yang memanfaatkan teknologi pengenalan suara sebagai perintah untuk menggerakkan robot, sehingga robot bisa dikendalikan oleh suara manusia namun dalam hal ini dibutuhkan untuk keamanan perintah yang hanya mengenali suara user dengan menggunakan EasyVr, dan telepon seluler GSM dibutuhkan untuk mentransmisikan data suara dengan jarak jauh, karena proses pengiriman data menggunakan telepon seluler akan lebih efektif dan efisien. Easy Voice Commander sebagai perekam suara user sebanyak dua kali ucapan dengan kata yang sama dan modul EasyVR sebagai modul pengenalan suara yang selanjutnya perintah perintah akan diolah oleh mikrokontroler Arduino sehingga robot bisa bekerja dengan baik sesuai perintah suara dari user.
Abstract-Photodynamic inactivation has been developed in reducing colony bacteria such as Staphylococcus aureus. Chlorophyll is known as a green pigment which can act as a photosensitizer. This research aimed to reduce colony using blue laser diode, chlorophyll and oxygen. Chlorophyll was produced from leaf extract of angsana (Pterocarpus indicus) and oxygen source obtained by medical oxygen. The treatments were divided to four groups, i.e. laser group, laser and adding chlorophyll group, laser and adding oxygen and laser and adding chlorophyll and oxygen. This result showed that 17.96% decrease at laser and adding chlorophyll group with time exposure of 40s.
Masalah mengenai kebersihan lingkungan yang tidak kondusif disebabkan karena masyarakat selalu tidak sadar akan baiknya kebersihan lingkungan dan manfaat membuang sampah pada tempatnya. Tujuan penelitian ini adalah membuat Tempat Sampah Pintar dan aplikasi pencarinya dengan menggunakan metode Haversine Formula untuk menemukan posisi tempat sampah terdekat menggunakan fitur GPS dan location based tracker pada smartphone Android. Dalam penelitian ini berhasil membangun dan menerapkan metode haversine formula untuk menemukan lokasi tempat sampah pintar yang paling dekat dengan pengguna. sehinga di dapat lokasi terdekat dari tempat sampah dengan nilai error rata-rata 1,98%.
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