Development Strategy of Infrastructure Risk Assessment Based Disaster Response and Management System

Major infrastructures such as levee, dam, bridge, road, etc. have a significant meaning in that they are the means to support ordinary social and industrial activities and also protect human and physical assets at the occurrence of disaster. Especially, integrated risk management of SOC facilities provides the policy maker in charge of SOC facility safety and related disaster prevention with a reasonable means of decision making and ultimately contributes to improving the safety of the applicable SOC facility. Furthermore, a variety of issues raised in the Sewol ferry disaster that occurred recently in Korea, such as, a proper response method and the relevant Golden time decision making at the occurrence of disaster, rapid grasping and reporting the situation on disaster sites, management and mobilization of resources for rescue and recover, loss of integrated control tower function, etc., might occur as well in facility disaster management. As the method of solving such issues adequately, this study suggests a strategy of new disaster response and management system. The analyses of Hazus-MH (FEMA) and DIMSuS (Purdue University) were comprehensively conducted, and based on the results required functions of new disaster response system of major infrastructure and its development directions were suggested.

High-index-contrast photonic structures:a versatile platform for photon manipulation

In optics,the refractive index of a material and its spatial distribution determine the characteristics of light propagation.Therefore,exploring both low-and high-index materials/structures is an important consideration in this regard.Hollow cavities,which are defined as low-index bases,exhibit a variety of unusual or even unexplored optical characteristics and are used in numerous functionalities including diffraction gratings,localised optical antennas and low-loss resonators.In this report,we discuss the fabrication of hollow cavities of various sizes(O.2-5μm in diameter)that are supported by conformal dielectric/metal shells,as well as their specific applications in the ultraviolet(photodetectors),visible(light-emitting diodes,solar cells and metalenses),near-infrared(thermophotovoltaics)and mid-infrared(radiative coolers)regions.Our findings demonstrate that hollow cavities tailored to specific spectra and applications can serve as versatile optical platforms to address the limitations of current optoelectronic devices.Furthermore,hollow cavity embedded structures are highly elastic and can minimise the thermal stress caused by high temperatures.As such,future applications will likely include high-temperature devices such as thermophotovoltaics and concentrator photovoltaics.