Mandatory IFRS Adoption And Financial Analysts' Information Environment: Evidence From Korean Market

The paper examines the effects of the mandatory adoption of International Financial Reporting Standards (IFRS) on financial analysts’ information environment, specifically on analysts forecast accuracy in the Korean market. We find that financial analysts’ forecast accuracy improves after the mandatory IFRS adoption. We further investigate the source of observed accuracy enhancements and find that the improved forecast accuracy is attributable to the increased precision in analysts’ information sets for KOSPI firms and increased opportunity for earnings management for KOSDAQ firms. We also find that the analyst coverage in Korean market is reduced after mandatory IFRS adoption

The Preparation of Non-aqueous Supercapacitors with Lithium Transition-Metal Oxide/Activated Carbon Composite Positive Electrodes

In order to increase the specific capacitance and energy density of supercapacitors, non-aqueous supercapacitors were prepared using lithium transition-metal oxides and activated carbons as active materials The electrochemical properties were analyzed in terms of the content of lithium transition-metal oxides The results of cyclic voltammetry and AC-impedance analyses showed that the pseudocapacitance may stem from the synergistic contributions of capacitive and faradic effects, the former is due to the electric double layer which is prepared in the interface of activated carbon and organic electrolyte, and the latter is due to the intercalation of lithium (Li+)ions The specific capacitance and energy density of a supercapacitor improved as the lithium transition-metal oxides content increased, showing 60% increase compared to those of supercapacitor using a pure activated carbon positive electrodopen4

Compact Silicon Slot Waveguide Intersection Based on Mode Transformation and Multimode Interference

Silicon slot waveguide intersections are necessary for photonic-integrated circuits based on silicon slot waveguides. We theoretically investigate a compact silicon slot waveguide intersection, which consists of mode transformers and a multimode strip waveguide crossing. The mode transformer before the crossing converts the slot waveguide mode into strip waveguide modes with amplitudes and phases appropriate for efficient operation of the crossing, which is based on multimode interference. The reverse conversion happens in the mode transformer after the crossing. The investigated intersection has a throughput of -0.078 dB, a crosstalk of -41 dB, and a footprint of 79.2 mu m(2). Its properties are better than those of previous silicon slot waveguide intersections, and especially its footprint is less than 33% of the previous ones. The intersection may be used for matrix switches based on silicon slot waveguides