Korea University

About: Korea University is a education organization based out in Seoul, South Korea. It is known for research contribution in the topics: Population & Catalysis. The organization has 39756 authors who have published 82424 publications receiving 1860927 citations. The organization is also known as: Bosung College & Bosung Professional College.

Do Foreign Direct Investment and Gross Domestic Investment Promote Economic Growth

Abstract: The paper attempts to show causal relationships between economic growth and FDI and GDI in 80 countries over the period 1971-95, by using a panel VAR model. The results show that FDI Granger-causes economic growth, and vice versa; however, the effects are rather more apparent from growth to FDI than from FDI to growth. Also, GDI does not Granger-cause economic growth, but economic growth robustly Granger-causes GDI. These findings suggest that strong positive associations between economic growth and FDI inflows or GDI rates do not necessarily mean that high FDI inflows or GDI rates lead to rapid economic growth.

Light upconverting core–shell nanostructures: nanophotonic control for emerging applications

Abstract: Light upconverting nanostructures employing lanthanide ions constitute an emerging research field recognized with wide ramifications and impact in many areas ranging from healthcare, to energy and, to security. The core–shell design of these nanostructures allows us to deliberately introduce a hierarchy of electronic energy states, thus providing unprecedented opportunities to manipulate the electronic excitation, energy transfer and upconverted emissions. The core–shell morphology also causes the suppression of quenching mechanisms to produce efficient upconversion emission for biophotonic and photonic applications. Using hierarchical architect, whereby each shell layer can be defined to have a specific feature, the electronic structure as well as the physiochemical structure of the upconverting nanomaterials can be tuned to couple other electronic states on the surface such as excitations of organic dye molecules or localized surface plasmons from metallic nanostructures, or to introduce a broad range of imaging or therapeutic modalities into a single conduct. In this review, we summarize the key aspects of nanophotonic control of the light upconverting nanoparticles through governed design and preparation of hierarchical shells in the core–shell nanostructures, and review their emerging applications in the biomedical field, solar energy conversion, as well as security encoding.

Burstiness and memory in complex systems

Abstract: The dynamics of a wide range of real systems, from email patterns to earthquakes, display a bursty, intermittent nature, characterized by short timeframes of intense activity followed by long times of no or reduced activity. The understanding of the origin of such bursty patterns is hindered by the lack of tools to compare different systems using a common framework. Here we propose to characterize the bursty nature of real signals using orthogonal measures quantifying two distinct mechanisms leading to burstiness: the interevent time distribution and the memory. We find that while the burstiness of natural phenomena is rooted in both the interevent time distribution and memory, for human dynamics memory is weak, and the bursty character is due to the changes in the interevent time distribution. Finally, we show that current models lack in their ability to reproduce the activity pattern observed in real systems, opening up avenues for future work. Copyright c �EPLA, 2008

A multifunctional core–shell nanoparticle for dendritic cell-based cancer immunotherapy

Abstract: Iron oxide and zinc oxide core–shell nanoparticles can deliver antigens into dendritic cells and also act as an imaging agent for cancer immunotherapy.