RANCANG BANGUN CLOSE CIRCUIT TELEVISION SECARA NIRKABEL MENGGUNAKAN ZIGBEE 2,4GHZ

Dwi Wahyu Irawan; Faqih Rofii; Anis Qustoniah

doi:10.31328/jwt.v26i2.791

RANCANG BANGUN CLOSE CIRCUIT TELEVISION SECARA NIRKABEL MENGGUNAKAN ZIGBEE 2,4GHZ

Widya Teknika ◽

10.31328/jwt.v26i2.791 ◽

2018 ◽

Vol 26 (2) ◽

Author(s):

Dwi Wahyu Irawan ◽

Faqih Rofii ◽

Anis Qustoniah

Keyword(s):

Infra Red ◽

Close Circuit Television

CCTV (Close Circuit Television) merupakan sistem keamanan yang popular menggunakan kamera pengawas. Namun pada saat ini masih memiliki beberapa kelemahan, diantaranya terdapat pada media transmisi video masih menggunakan kabel dan cara perekaman gambar yang masih menggunakan metode manual. Sistem pemantau video secara nirkabel merupakan perpaduan beberapa komponen, berupa Zigbee/Xbee yang merupakan komponen komunikasi data nirkabel, sensor gerak PIR (Passive Infra Red) sebagai pendeketeksi gerakan, dan Arduino MEGA2560 yang berfungsi sebagai perangkat yang menghubungkan antara pengguna dan jaringan Zigbee/Xbee dan terhubung dengan perangkat lunak pada PC sehingga dapat melakukan pengiriman data secara nirkabel dan dapat merekam data secara otomatis jika ada gerakan yang terdeteksi.

Download Full-text

Electron Microscopy of Human Gallstones

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100065523 ◽

1971 ◽

Vol 29 ◽

pp. 296-297

Author(s):

C. Wolpers ◽

R. Blaschke

Keyword(s):

Electron Microscopy ◽

Room Temperature ◽

Bile Pigment ◽

X Ray Diffraction ◽

Triclinic Crystal System ◽

X Ray ◽

Follow Up Study ◽

Infra Red ◽

Main Components

Scanning microscopy was used to study the surface of human gallstones and the surface of fractures. The specimens were obtained by operation, washed with water, dried at room temperature and shadowcasted with carbon and aluminum. Most of the specimens belong to patients from a series of X-ray follow-up study, examined during the last twenty years. So it was possible to evaluate approximately the age of these gallstones and to get information on the intensity of growing and solving.Cholesterol, a group of bile pigment substances and different salts of calcium, are the main components of human gallstones. By X-ray diffraction technique, infra-red spectroscopy and by chemical analysis it was demonstrated that all three components can be found in any gallstone. In the presence of water cholesterol crystallizes in pane-like plates of the triclinic crystal system.

Download Full-text