Dr. Tung H. Jeong One of Five Visiting Speakers

News release announcing Dr. Tung H. Jeong, child immigrant from China and associate professor of physics at Lake Forest College, will be one of five guest speaker when the Ohio Section of the American Physical Society meets at the University of Dayton

Compact wideband patch antenna for 5 and 6 GHz WLAN applications

Copyright @ 2008 IEICEA wideband rectangular and circular mistostrip patch antenna for 5 and 6 GHz WLAN applications is presented. The rectangular and the circular patches are fed by microstrip line. All the structure is placed on the same layer with a very simple structure. The impedance bandwidth for the antenna presented 22.41 % ranging from 5.15 GHz to 6.45 GHz. The radiation pattern including E-plane and H-plane is satisfactory within this bandwidth

Fracture of a viscous liquid

When a viscous liquid hits a pool of liquid of same nature, the impact region is hollowed by the shock. Its bottom becomes extremely sharp if increasing the impact velocity, and we report that the curvature at that place increases exponentially with the flow velocity, in agreement with a theory by Jeong and Moffatt. Such a law defines a characteristic velocity for the collapse of the tip, which explains both the cusp-like shape of this region, and the instability of the cusp if increasing (slightly) the impact velocity. Then, a film of the upper phase is entrained inside the pool. We characterize the critical velocity of entrainment of this phase and compare our results with recent predictions by Eggers

Philosophical Interactions between "East and West": China, Korea, Europe and the Case of Dasan (Jeong Yak-yong, 1762–1836)

Though the Confucian system of thought, society, and government has a long history in Korea, Chinese Confucian scholars, preoccupied with the urgency of “saving the Confucian essence” used only Japan as a reference in Asia. Therefore, the present article aims to introduce Dasan 茶山 (Jeong Yak-yong 정약용, 1762–1836), who was one of the main representatives of Korean Confucian philosophy. It exposes his significance for the full-range understanding of the landscape of this important traditional East Asian stream of thought as well as for the intellectual syntheses between Confucian teachings and the Christian religion. The author analyses Dasan’s thought from the Sinological perspective and exposes several elements which represent an elaboration and an upgrading of traditional Chinese Neo-Confucian philosophy.  Ne glede na dejstvo, da ima konfucijanski idejni, družbeni in politični sistem v Koreji že dolgo zgodovino, so kitajski konfucijanski teoretiki v svojih prizadevanjih za »reševanje esence konfucijanstva« kot azijsko referenco običajno upoštevali zgolj Japonsko. Zato namerava pričujoči članek predstaviti Dasana 茶山 (Jeong Yak-yonga 정약용, 1762–1836), ki sodi h glavnim predstavnikom korejske konfucijanske filozofije. Izpostavlja njegov pomen za celovitejše razumevanje širokega spektra te pomembne vzhodnoazijske idejne struje in za vzpostavljanje miselnih sintez med konfucijanskimi nauki in krščansko religijo. Avtorica analizira Dasanovo miselnost iz sinološke perspektive in v njej izpostavi vrsto elementov, ki predstavljajo nadgradnjo tradicionalne kitajske neokonfucijanske filozofije.

The Far-Infrared Properties of Spatially Resolved AKARI Observations

We present the spatially resolved observations of IRAS sources from the Japanese infrared astronomy satellite AKARI All-Sky Survey during the performance verification (PV) phase of the mission. We extracted reliable point sources matched with IRAS point source catalogue. By comparing IRAS and AKARI fluxes, we found that the flux measurements of some IRAS sources could have been over or underestimated and affected by the local background rather than the global background. We also found possible candidates for new AKARI sources and confirmed that AKARI observations resolved IRAS sources into multiple sources. All-Sky Survey observations are expected to verify the accuracies of IRAS flux measurements and to find new extragalactic point sources.Comment: 11 pages, 7 figures, accepted publication in PASJ AKARI special issu

Robustness of complex networks to node and cluster damage

Copyright @ 2009 Universtiy of WarwickThe goal of this investigation is to assess the robustness of two popular network structures – random networks and scale-free networks – to node and cluster damage. There is no previous work on the latter. For node damage, we remove nodes iteratively and for cluster damage, we first build a network of clusters and then remove the nodes (clusters)

Conditional Production of Superpositions of Coherent States with Inefficient Photon Detection

It is shown that a linear superposition of two macroscopically distinguishable optical coherent states can be generated using a single photon source and simple all-optical operations. Weak squeezing on a single photon, beam mixing with an auxiliary coherent state, and photon detecting with imperfect threshold detectors are enough to generate a coherent state superposition in a free propagating optical field with a large coherent amplitude ($\alpha>2$) and high fidelity ($F>0.99$). In contrast to all previous schemes to generate such a state, our scheme does not need photon number resolving measurements nor Kerr-type nonlinear interactions. Furthermore, it is robust to detection inefficiency and exhibits some resilience to photon production inefficiency.Comment: Some important new results added, to appear in Phys.Rev.A (Rapid Communication

Discussion of Revisiting the Resilience Index for Water Distribution Networks by Gimoon Jeong, Albert Wicaksono, and Doosun Kang

Cabrera Marcet, E.; Gomez Selles, E.; Del Teso-March, R.; Estruch-Juan, ME. (2019). Discussion of Revisiting the Resilience Index for Water Distribution Networks by Gimoon Jeong, Albert Wicaksono, and Doosun Kang. Journal of Water Resources Planning and Management. 145(1):1-4. https://doi.org/10.1061/(ASCE)WR.1943-5452.0000792S14145