Wireless sensor networks (WSNs) have a vital role in indoor localization development. As today, there are more demands location-based service (LBS), mainly environments, which put the researches on massive attention. global-positioning-system (GPS) is unreliable indoor, some methods WSNs-based been developed. Path loss model-based can be useful for providing power-distance relationship distance-based localization. Received signal strength indicator (RSSI) has commonly utilized and proven to...

Abstract We demonstrated the sensitivity enhancement for magneto-optical surface plasmon resonance (MOSPR) using noble/ferromagnetic metals multilayers. The proposed structure is based on Kretschmann configuration in transverse Kerr effect (TMOKE) methods with FeCu superlattices (SLs) as magneto-plasmonic materials and gelatin biomolecules analyte. dielectric constants of SLs are taken from first principles calculation, which performed by a full-potential linearized augmented plane wave...

In this paper, we developed homemade and computerized sensor system based on Surface Plasmon Resonance (SPR). The systems consist of mechanical instrument, laser power sensor, user interface. development that uses anti-backlash gear design was successfully able to enhance the angular resolution angle incidence up 0.01°. system, detector acquisition stepper motor controller utilizing Arduino Uno which is easy program, flexible, low cost, used. Furthermore, employed LabView's interface as...

Gelatin is a biopolymer derived from collagen that widely used in food and pharmaceutical products. Due to some religion restrictions health issues regarding the gelatin consumption which extracted certain species, it necessary establish robust, reliable, sensitive simple quantitative method detect different parent species. To best of our knowledge, there has not been differentiation based on optical sensor could species quantitatively. Surface plasmon resonance (SPR) biosensor known be...

ABSTRAK: Romokalisari merupakan bagian hilir dari sungai Lamong, dimana daerah tersebut pasang surut dan rawan terhadap banjir. banyak ditumbuhi oleh mangrove yang sangat rapat. Tujuan penelitian ini adalah untuk mengetahui pengaruh kerapatan laju pengendapan suspended sedimen pada perairan Romokalisari, Surabaya. Sampel diambil 8 stasiun terbagi dalam wilayah muara, laut, masing-masing diulang 4 kali dengan periode setiap minggu. Analisis sampel menggunakan metode hydrometer analisis data...

Mechanical optimization has been done on the surface plasmon resonance (SPR) homemade. At set-up, angle scanning comes a small resolution to detect changes in thickness of thin film or refractive index sample. The mechanical drive function rotate prism and detector. Torsional Spring-Loaded Gear Antibacklash is used improve accuracy drive. stepper motor automatically. built system successfully increased rotation by 0.01°. test using blank indicates Total Internal Reflection occurs at an...

The electronics structure of monochalcogenide materials buckled square lattice is investigated by computation based on Density Functional Theory (DFT). investigation shows that there spin splitting xy-plane at Γ point and M as a Rashba effect. Perturbation theory k.p symmetry group C2v used to calculate the originates splitting. results show are strong for with center atom Pb (with parameter 5∼ eVÅ). Spin orientation displayed spin-texture time reversal between upper band lower band. This...

This study focused on the cultural strategies of Dayak Kenyah traditional community in Lung Anai Village farming practices as a response to government policy concerning controlling forest and land burn. The strategy referred was social practice related management utilization local resources, including wisdom form burning which is passed down from one generation next. research method that researcher used type qualitative descriptive with data collection carried out by means observation...

Two-dimensional tungsten-based transition metal dichalcogenides (TMDCs), $MX_{2}$ ($M$: W, Mo; $X$: S, Se, Te) monolayers (MLs) with a $1T'$ structure, serve as significant-gap quantum spin Hall insulators. However, due to the centrosymmetric nature of these crystals, degeneracy persists throughout their electronic band structures, limiting potential for spintronic applications. By modifying chalcogen ($X$) atoms in TMDCs ML surface create highly stable Janus $MXX'$ MLs we demonstrate...

Optical properties of several transition metals, namely 3d (Fe, Ni, Co, Cu), 4d (Ru, Rh, Pd, Ag), and 5d (Os, Ir, Pt, Au) for the application surface plasmon resonance (SPR) were investigated. Using first-principles density functional theory method, we calculated optical conductivities dielectric constant by including contributions from intraband interband transitions. The results all systems reproduce experimental trends qualitatively. contribution Drude model is very dominant at low energy...

We have previously reported the surface plasmon resonance (SPR)-based biosensor ability for quantitatively differentiating bovine and porcine gelatin has been done by us before. However, it some inaccuracies. By improving method of detection, results this study shows that difference between was more distinguishable. The sensor response models acquired were nonlinear as in previous study. they show different characteristics. sensitivities obtained are higher than those ones, i.e., 3.04 o 4.29...

The adsorption of methylene blue dye using biosorbents based on humic acid cross-linked cellulose has been carried out. adsorbent HA/Cel-Epi characterized FTIR, XRD, and SEM spectroscopy. results characterization FTIR indicated that adsorbents had active functional groups among others ‒OH, ‒C=O, ‒COOH. XRD result confirmed diffraction peaks the area 2θ around 11.83; 20.27; 21.90; 28.28º. showed surface irregular shape pores size. optimum condition interaction MB occurred in pH range 6-8,...

DNA level of purity has been tested by observing the phenomenon surface plasmon resonance (SPR) in silver film + (Ag) nanoparticles system as sensor using Kretschmann configuration. Surface observed condition reflectance spectrum vary with incident angle laser, beamed toward prism. System is built a model for test instrument that give higher accuracy. testing was conducted placing layer various ratio on prism order to get shift value each sample result. Purity indicates quality based between...

In this study, we investigated the effect of an electric potential on localized surface plasmon resonance (LSPR) properties Fe <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> O xmlns:xlink="http://www.w3.org/1999/xlink">4</inf> /Ag composite magnetic nanoparticles. The nanoparticles were synthesized using co-precipitation methods and deposited BK7 hemispherical prisms coated in Au thin film. light source used is A He-Ne laser beam with a...

Jalan merupakan infrastruktur transportasi darat yang berperan sangat penting dalam perkembangan suatu wilayah. berfungsi untuk mendukung kegiatan sosial budaya, ekonomi, pendidikan, serta pertahanan dan keamanan dari Kota Semarang sudah memiliki jaringan jalan menghubungkan pada bagian wilayah kota BWK IV Tembalang, VII (Banyumanik) VIII (Gunungpati) belum optimal. Untuk itu guna meningkatkan bangkitan tarikan maka perlu perencanaan prasarana antara ketiga efisiensi pelayanan utamanya...