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"Telah dilakukan penelitian mengenai deteksi lalulintas menggunakan sensor PIR. Penelitian ini bertujuan mempelajari sensor PIR yang dapat mendeteksi kendaraan melalui sinar inframerah yang dipancarkan, serta menentukan penempatan sensor yang terbaik di jalan bebas hambatan. Proses pengambilan data dilakukan dengan melakukan simulasi-simulasi terkendali yang mendekati keadaan jalan bebas hambatan sebenarnya. Metode teoritis digunakan dalam mempelajari cara kerja sensor PIR sedangkan metode eksperimen digunakan untuk proses pengambilan data dengan berbagai variasi. Hasil yang diperoleh adalah posisi terbaik dalam penempatan sensor di jalan bebas hambatan dengan ketinggian 1m dan tegak lurus dengan lintasan kendaraan.

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Detection of traffic system has been researched using PIR sensor. The purposes of research are knowing characteristic of PIR sensor and able to detect vehicles by infrared radiation, also determine the best sensor positioning in freeways. The process of data taking by controlled simulation close up to real condition of freeways. Theorytical methode used for learning PIR sensor. Experiment methode used to process data taking with variations. The result are the best positioning sensor in freeways with 1m height perpendicular to vehicles pathway."

"Telah dibuat suatu rangkaian antar muka dari sensor infra merah yang ditampilkan dalam komputer berupa data output tegangan. Jenis sensor ini termasuk sensor pasif yang tidak memancarkan sinar infra merahnya sendiri. Sistem pendeteksi kendaraan ini bekerja berdasarkan perbedaan temperatur, antara temperatur lingkungan dengan temperatur objek yang melaluinya. Dengan menggunakan ADC, data sensor diubah menjadi data digital dan dikirim ke komputer melalui port printer paralel PC serta diolah menggunakan perangkat lunak berbasis VB 6.0. Data yang diperoleh menunjukkan bahwa perubahan jarak benda dari sensor mempengaruhi sinyal keluaran sensor. Perubahan jarak disimulasikan sebagai ukuran atau jenis kendaraan. Hasil penelitian ini menunjukkan bahwa sensor yang digunakan tidak dapat menentukan besar atau jenis kendaraan.

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It has been made an interface circuit from infrared sensor and visualized in to a computer as a digital output voltage data. This sensor is a passive sensor that doesn’t emit its own infrared light. This vehicle system works based on temperature differences between the ambient temperatur and the temperatur of the object. The data which resulted from sensor are converted to be digital data by a convertion ADC 0809 and it transfered to the PC by parallel printer port. This system is controlled by a software using VB 6.0. The results give conclusion that many various of distances from the object to sensor and temperatur variations are affecting the output signal of sensor. Those variations of distances are simulated as a size and a type of vehicles. From the results of this experiment, this sensor can not used to determine the size or the type of vehicle."

"Human teeth enamel have been irradiated with gamma radiation from Co60 at room temperature and at liquid nitrogen temperature. Paramagnetic centers are formed and have been detected by using electron spin resonance (ESR) spectrometer at room temperature. The main signal is very stable asymmetric singlet, and attributed to h centers in the hydroxyapatite crystals. It is revealed that several factors influence the amplitude of the asymmetric signal. The amplitude and pattern of the asymmetric signal which depend on the orientation of the sample with respect to the magnetic field are analyzed. Based on the properties of the asymmetric signal the difference between the microcrystal arrangement of healthy and diseased teeth are explained."