Accurate and quantifiable measurement of light is essential in creating desired outcomes in practical day to day applications as well as unique applications such as Traffic lighting system, Poultry Industry, Gardening, Museum lighting system, at emergency exits etc. Hence, Light measurement and analysis is an important step in ensuring efficiency and safety. Many of the industries are burdened with limited number of resources and real shortage of experts on their fields; real time remote monitoring presents an effective solution that minimizes their efforts and expenditures to achieve the desired results within time. This paper introduces real time remote Light intensity monitoring system using Raspberry Pi which enables the user to track the lighting system remotely. Raspberry pi is a low cost ARM powered Linux based computer which acts as a server, and it communicates with clients with LAN or external Wi-Fi module. The key feature of this system is light intensity being monitored instantaneously and data stored in the database for future use, and shown in the form of dynamic charts to the user according to the user requirement in a terminal device like Tablet or Smart Phone or any internet enabled device. This empowers experts to make right decisions at right time to get desired results.

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We propose an in-situ tunable chiral quantum system, composed of a quantum emitter coupled to a waveguide based on the Rice-Mele model (where we alternate both the on-site potentials and tunnel couplings between sites in the waveguide array). Specifically, we show that the chirality of photonic bound state, that emerges in the bandgap of the waveguide, depends only on the energy of the qubit; a parameter that is easy to tune in many artificial atoms. In contrast to previous proposals that have either shown imperfect chirality or fixed directionality, our waveguide quantum electrodynamics scheme achieves both perfect chirality and the capability to switch the directionality on demand with just one tunable element in the device. We also show that our model is easy to implement in both state-of-the-art superconducting circuit and quantum dot architectures. The results show technological promise in creating long-range couplers between qubits while maintaining, in principle, zero crosstalk.

Abstract:Light enables us to view, perceive and enjoy the various forms of visual communication. Inadequate light may lead to problems like lack of interest, failure to concentrate, sleepiness and apparent laziness. Further, eyestrain, headache, indigestion and irritability are the other problems due to inadequate light. In residential ho mes, the living roo m being used for different kinds of activities like, relaxat ion, family entertain ment, get together etc., which require variety of lighting techniques. Study room is also an important area where a lot of close visual tasks and skilled work are performed which require suitable type of lighting of adequate quantity. Hence measurement of light intensity is the important task to main required LUX levels for various workp laces. To accurately measure the light intensity in a given spot, it is best to use a light meter. In commercial light meters different signal conditioning circuits are used. Selecting a suitable signal conditioning circuit is an important task for instrumentation engineer. So, this paper tries to evaluate the performances of different signal conditioning circu its in terms of linearity, sensitivity and accuracy.