We present results on electrically driven nanobeam photonic crystal cavities formed out of a lateral p-i-n junction in gallium arsenide. Despite their small conducting dimensions, nanobeams have robust electrical properties with high current densities possible at low drive powers. Much like their two-dimensional counterparts, the nanobeam cavities exhibit bright electroluminescence at room temp...

We have developed an approach for whole-house gross movement and room transition detection through sensing at only one point in the home. We consider this system to be one member of an important new class of human activity monitoring approaches based on what we call infrastructure mediated sensing, or "home bus snooping." Our solution leverages the existing ductwork infrastructure of central he...

Keys play an important role in a security system. Most room door systems still use conventional locks, especially management applications. Room with keys has several problems, such as long key searches for each loan, and easily lost duplicated. Therefore, the authors propose lock system that is capable of automating control supervision via internet network. Research been done previously uses si...

Commanding Indian Military Hospital, Pishin. About midnight lst-2ncl February, 1928, two men went to sleep in a small room (8 X J feet) in this cantonment, with the door and the window closed and a pan of steam coal burning inside. As they did not get up by 9 a.m. next day (2nd February, 1928) and noisy breathing was heard from their room, with a smell of poisonous gas emanating from the chinks...

In the area of motion planning, considerable work has been done on guarding problems, where “guards”, modelled as points, must guard a polygonal space from “intruders”. Different variants of this problem involve varying a number of factors. The guards performing the search may vary in terms of their number, their mobility, and their range of vision. The model of intruders may or may not allow t...

This paper evaluates natural ventilation effectiveness in one fully dependent Air Conditioned-Educational Building Depok to recommend potential passive cooling approaches toward user thermal comfort. study involves building surveys measure the temperature and humidity of three selected classrooms, A, B, C, with varying configurations capacities. Airflow simulation using Computational Fluid Dyna...

Suppose you’re on a game show, and you’re given the choice of three doors: Behind one door is a car; behind the others, goats. You pick a door, say No. 1, and the host, who knows what’s behind the doors, opens another door, say No. 3, which has a goat. He then says to you, “Do you want to pick door No. 2?” Is it to your advantage to switch

This work provides a case study on the indoor environment and ventilation rate of naturally ventilated research student rooms in Chinese universities. In measured room, air temperature, relative humidity carbon dioxide (CO2) concentration were monitored during heating period for 4 weeks. The number occupants, occupied time room window/door-opening cases simultaneously recorded. Results showed w...