Penelitian biological assessment pada pertumbuhan lumut di Candi Borobudur ditujukan sebagai inisiasi penelitian untuk menentukan rumus hubungan antara pertumbuhan lumut dengan tingkat kerusakan candi. Penelitian dilakukan dengan mengambil sampel pada sisi utara dan sisi selatan lorong 2 Candi Borobudur. Pengambilan sampel dilakukan pada empat spot pada setiap sisi dengan pengulangan dua kali setiap spotnya. Sampel dari lapangan ditimbang kemudian dikeringkan dalam oven hingga berat konstan dan dibakar dalam furnace untuk memisahkan sisa partikel lumut dengan pasir. Berdasarkan data berat dilakukan konversi sehingga didapatkan nilai indeks konversi sebesar 0.00560274 x g/cm2 berdasarkan tutupan lumut terhadap massa pasir batuan yang terbawa oleh lumut. Berdasarkan nilai indeks, dapat disimpulkan bahwa lumut tidak menjadi ancaman yang berarti bagi keberlangsungan Candi Borobudur karena sedikitnya jumlah pasir yang terbawa oleh lumut ketika diambil dari batuan.
Safety issue and accident of land transportation needs to be concerned about. One of the main reasons of most driving accidents is drowsiness since it is associated with circadian rhythm, which is formed by blue light in solar day light. Studies reported that blue light controls circadian rhythm and prevent drowsiness. This research aims to assess the effect of artificial blue light exposure at night that is expected to prevent drowsiness and behavior changes related to night driving. Behavioral changes can be observed from cognitive response activities that are evaluated by physiologic changes of brainwaves. Seven male subjects were chosen that met the assigned criteria. Brainwaves data was collected from 21.00 to 22.30 using the Electroencephalograph (EEG) from F3 and F4 channels for cognitive function. Results of blue light exposure suggested: (1) temporary effect on cognitive function, (2) fluctuation of brainwave activity in one minute interval, (3) increase hemispheric synchronization in cognitive function, and (4) delay brain asymmetric pattern in cognitive function. We concluded that blue light exposure influences the function of cognitive functions and has potential effect to prevent drowsiness.
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