A terrestrial laser scanner emerges as a main mapping technology for the indoor 3D model by providing fast and accurate 3D data. However, the field process to acquire the indoor 3D data using a terrestrial laser scanner heavily relies on the expert's field experiences. In this paper, the new method consisting of determination of optimal terrestrial laser scanner locations for indoor mapping using a genetic algorithm (GA) is proposed to acquire indoor 3D data more efficiently. The proposed method using GA utilizes building outlines extracted from 2D CAD drawings and it makes determination of the optimal locations and the number of scanner settings simple and fast. Furthermore, if the result of the proposed method is practically adopted with field experiences, it is expected to create a synergy effect in the process of acquiring indoor 3D data.

We investigated a novel green route synthesis of silver nanoparticles (AgNPs) using watermelon rind powder extract (WR-AgNPs) as a reducing and capping agent. The efficiency of nanoparticle synthesis was evaluated by comparing the structure, functional groups, antibacterial activity, and cytotoxic effects with commercial AgNPs (CAgNPs). The AgNP production was initially confirmed based on color changes and wavelength scanning by ultravioletvisible spectra, which exhibited a surface plasmon resonance peak at 450 nm. We used energy-dispersive spectroscopy to confirm silver and sample purity of both experimental and commercial AgNPs from 2 to 4 keV. Fourier transform infrared spectroscopy analysis showed that the AgNPs were reduced and capped with biomolecules from functional groups in the watermelon powder extract. Further, the analysis showed that the synthesized AgNPs were similar to C-AgNPs. The morphology and crystalline nature of both AgNPs were determined using high-resolution transmission Palanivel Velmurugan and Sung-Chul Hong have contributed equally to this work. B Subpiramaniyam Sivakumar electron microscopy and X-ray powder diffraction. In addition, the synthesized and commercial AgNPs were subjected to antibacterial and cytotoxicity assays. Three-way ANOVA indicated that treatments for WR-AgNPs or C-AgNPs as well as concentration and time had significant effects on Brevibacterium linens and Staphylococcus epidermidis-an odor-causing bacteria. With respect to cytotoxic effects, 67 % cell death was observed with high concentrations (10 mg/L) of both AgNPs.

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