• The Journal of the Korea institute of electronic communication sciences
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• 제13권1호
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• pp.15-22
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• 2018

In this paper, a microstrip-fed triple-band monopole antenna for WLAN/WiMAX applications was proposed. The proposed antenna is consist of two arc-shaped and one strip line structure, then get the three current path and then designed in order to get triple resonant characteristics. We carried out simulation about parameters. Taking account of coupling effect, Adjusted the length of the two arc-shaped and one strip line, we get the optimized parameters. The proposed antenna is fabricated on an FR-4 substrate, the dielectric constant is 4.4, and total size is $23.5mm(W1){\times}32.0mm(L1){\times}1.0mm(t)$, and its proposed antenna size is $21.0mm(W6){\times}31.0mm(L7)$. From the measured results, return loss of the proposed antenna satisfied return loss 927 MHz (1.844~2.771 GHz), 926 MHz (3.33~4.256 GHz), and 1,415 MHz (5.13~6.545 GHz). And measured results of gain and radiation patterns displayed for operating bands.

• Bulletin of the Korean Chemical Society
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• 제34권11호
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• pp.3243-3248
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• 2013

The tissue inhibitor of metalloproteinase-2 (TIMP-2) inhibits matrix metalloproteinases activity and modulates cellular proliferation and apoptosis. The human serum albumin-TIMP-2 with folic acid conjugate (termed HT2-folate) was synthesized to promote uptake through folate receptors (FRs), and a corresponding radio-labeled compound was prepared for tumor diagnosis by positron emission tomography (PET). $^{68}Ga$-NOTA-HT2-folate was synthesized from $^{68}Ga$ and the NOTA chelator with HT2-folate. The fusion protein was identified using MALDI-TOF mass spectrometry. The radioligand was prepared with a high radiochemical yield. Cell-surface association of $^{68}Ga$-NOTA-HT2-folate significantly increased over time in FR-positive tumor cells. In animal PET and biodistribution studies, tumor uptake was very high as early as 1 h after radioligand injection. Folate conjugation enhanced the selective receptor-targeting efficacy of HT2 in FRexpressing tumors, and its radioligand will be useful as an in vitro tool and for in vivo tumor diagnosis by PET imaging.

• The Transactions of The Korean Institute of Electrical Engineers
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• 제67권8호
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• pp.1024-1030
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• 2018

Recently, the large scaled energy storage system(ESS) which has various functions such as peak saving, demand management, output stabilization of renewable energy and frequency regulation(FR) is being energetically installed and operated. Especially, as the use case of frequency regulation ESS, the KEPCO has demonstrated the total of 376[MW] ESS since 2014. However, there are no operational experiences and international technical standards on frequency regulation application in ESS. Therefore, this paper propose the evaluation algorithm for power system performance of ESS by considering the frequency characteristics between governor of existing generator and frequency regulation ESS, in order to verify the power system performance of ESS. And also, this paper propose an evaluation modeling for small scaled power system including the existing generator, frequency control ESS and customer loads based on the PSCAD/EMTDC S/W. From the simulation results in 360[MW] model power system, it is confirmed that frequency regulation ESS has better performances than conventional generators.

• Journal of the Society of Naval Architects of Korea
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• 제53권5호
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• pp.371-379
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• 2016

In the ship design process, ship motion and propulsion performance in sea waves became very important issues. Especially, prediction of ship propulsion performance during real operation is an important challenge to ship owners for economic operation in terms of fuel consumption and route-time evaluation. Therefore, it should be considered in the early design stages of the ship. It is thought that the averaged value and fluctuation of effective inflow velocity to the propeller have a great effect on the propulsion performance in waves. However, even for the nominal velocity distribution, very few results have been presented due to some technical difficulties in experiments. In this study, flow measurements near the propeller plane using a stereo PIV system were performed. Phase-averaged flow fields on the propeller plane of a KVLCC2 model ship in waves were measured in the towing tank by using the stereo PIV system and a phase synchronizer with heave motion. The experiment was carried out at fully loaded condition with making surge, heave and pitch motions free at a forward speed corresponding to Fr=0.142 (Re=2.55×106) in various head waves and calm water condition. The phase averaged nominal velocity fields obtained from the measurements are discussed with respect to effects of wave orbital velocity and ship motion. The low velocity region is affected by pressure gradient and ship motion.

• Journal of the East Asian Society of Dietary Life
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• 제9권4호
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• pp.442-451
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• 1999

This study was conducted to investigate the antimicrobial activity of Prunus mume extracts. Prunus mume extracts have growth inhibitory activity to various microorganisms. Gram positive bacteria such as Bacillus cereus, Bacillus subtilis, Micrococcus leteus, Staphylococcus epidrimidis were more easily inhibited than Gram negative bacteria tested Vibrio parahaemolyticus, Salmonella typhimurium, Escherichia coli, Proteus vulgaris and Yeasts by Prunus mume extracts. Among several fractions of methanol extract, EtOAc & BuOH fractions were showed strong antibacterial activities, but those fractions were not showed on fungi.

• Journal of Acupuncture Research
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• 제18권2호
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• pp.79-90
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• 2001

Objective : The aim of the present study is to investigate whether stimulating a specific auricular point(胃點) is effect on suppression of appetite. Methods : This study evaluated the changes of Reduced-Nicotinamide-Adenine-inucieotide-Phosphate-diaphorase(NADPH-d)-positive neurons using a histoehemical method. Staining intensities of NADPH-d-positive neurons were assessed in a quantitative fashion using a microdensitometrical method based on optical density by means of an image analyzer. Results : The results show as follows ; 1. In the RSG/RSA, FRI/FR2, HL, PAR1 area, The optical density of NADPH-d-positive neurons of fasted group was significantly decreased in comparison to fed group. 2. In most cortical area, It was not significant statistically, But the optical density of NADPH-d-positive neurons of fed with auricular acupuncture group was decreased in comparison to fed group. 3. In most cortical area, It was not significant statistically, But fasted with auricular acupuncture group increased the optical density of NADPH-d-positive neurons comparison to fasted group. Conclusions : We conclude that stimulating the specific auricular points is able to effect on NO(Nitric Oxide)-expression in the brain cortex of sprague dawley rats, The results suggest that auricular acupuncture may be useful for controlling obesity.

• The Journal of the Korea institute of electronic communication sciences
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• 제6권5호
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• pp.611-620
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• 2011

A planar monopole antenna that was developed for WLAN/WiMAX application is presented in this paper. The proposed antenna with three strips, an asymmetrical ground plane, and a rectangular slit in the ground is designed to cover the popular frequency spectrum of WLAN (wireless local area network) bands and WiMAX (Worldwide Interoperability for Microwave Access) bands. The proposed antenna, which is capable of wideband operation, is fed by a strip line and fabricated on an FR-4 substrate. The obtained numerical results agree well with the experiment data. It was validated that the configuration can meet the demands for the WLAN/WiMAX systems and effectively enhanced the impedance bandwidth to 9.95% for the lower band and 76.05% for the upper band for VSWR < 1 : 2. This paper also presents and discusses the 2D radiation patterns and 3D gains according to the results of the experiment.

• Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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• 제8집
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• pp.143-173
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• 2003

In dieser Arbeit wird versucht, einen weiteren theoretischen Rahmen $f\"{u}r$ die Farbensymbole(Rot, Gelb und Grun) in der deutschen, englischen und korearischen Sprache, vor allem in Idiomatik weiterzuentwickeln. Rot und Grun sind in diesen Sprachen reichlicher als Gelb vertreten. Die symbolische Bedeutung von Rot ist besonders ambivalent Es ist die Farbe der Gesundheit, aber auch die Farbe des Blutes, Krieges und Todes. Rot ist in den untersuchten Sprachen als 'sehr', 'gut', 'gesund' oder 'schlecht' belegt Rot zeigt aber einzelsprachliche Eigenschaften. Im Koreanischen ist Rot syrnbollisch mit 'Frau', im Englischen mit $'B\"{u}rokratismus'$ verbunden.. Gelb hat auch $widerspr\"{u}chliche$ Symbolbedeutung .Es ist die Farbe der $Fr\'{u}hlingsblumen$, der Sonne und des Lichtes. Aber Gelb kann die Farbe von 'Neid, Eifersucht' oder 'feige, schlecht' sein. Grun ist die wichtigste Farbe der Natur. So ist diese Farbe symbolisch mit 'gut', 'unreif, 'sehr, viel', 'Wachstum und Gedeihen' assozziert. Durch Vergleich und Analyse der Farbensymbole in diesen drei Sprachen und durch Resultat der Antwort auf Fragenbogen an denen 99 Deutschen, 100 Amerikaner und 101 Koreaner teilnahmen, zeichnen sich folgende Ergebnisse ab. Sprachsymbole von dieser Farbe hat auf die Farbenwahrnehmungen von diesen Leuten nicht direkte $Einfl\"{u}sse{\;} ausge\"{u}bt$. Rot assoziert in 89 Koreanern und 5 Amerikanern 'Leidenschaft': Gelb in 52 Amerikanem, 47 Deutschen und 38 Koreanern $'W\"{a}rme'$: Grun in 33 Amerikanern, '37 Deutschen und 11 Koreanern 'Frieden'. Im Englischen und Deutschen zeigt sich die Assoziation von Gelb mit 'Neid, Eifersucht', was mit kulturellen Vorstellungen $\"{u}bereinstimmt$. 38 Deutsche und 4 Amerikaner geben $f\"{u}r$ Gelb die Symbolbedeutung 'Neid' an. Hier bin ich mit sprachlichem Determinismus von Wharf-Hypothese einverstanden: Verschiroene Sprachgemeinschaften erfassen die Wirklichkeit in ganz verschiedener Weise. Sprachsymbol und Kul­tursymbol scheinen an die Farbenwahrnehmungen von untersuchten Leuten $anzukn\"{u}pfen$.

• Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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• 제8집
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• pp.199-221
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• 2003

In dieser Arbeit wird untersucht, ob die rhetorischen Regeln zur Textproduktion auch auf die Textanalyse einer Rede anwendbar sind, und zwar einer vor der Systematisierung der Rhetorik verfassten Rede, $n\"{a}mlich$ dem Enkomium der Helene von Gorgias. Die Untersuchung ihrer $Anwendungsm\"{o}glichkeit$ als Ana1ysekategorien liegt der Vermutung nahe, dass das Enkomiurn auch rhetorische Elemente $enth\"{a}lt$, weil eine Theorie wie die Rhetorik erst durch die Beobachtung der musterhaften Reden, die Entdeckung ihrer $Regelm\"{a}{\ss}igkeiten$ und deren Synthetisierung entstanden ist Deswegen ist die Untersuchung norma1erweise mit der Festste1lung der im Text angewandten rhetorischen Regeln identisch. Dieses Verfahren aber $\"{u}berzeugt$ uns, dass dem Gorgias das Gliederungsschema der DISPOSITIO, die Sonderform der Einleitung INSINUATIO, die Prinzipien der Kurze und $Glaubw\"{u}rdigkeit$ in der $Erz\"{a}hlung$ sowie der Zusammenfassung im Schluss, das dem Enthymem $\"{a}hnliche$ logische Mittel LOGISMOS, die Stasis der $Qualit\"{a}t$, die Topoi der Stammung und Gerechtigkeit, die sog. gorgianischen Figuren usw. nicht fremd sind. Wegen des Streites um die $Zusammengeh\"{o}rigkeit$ dieser Rede zur epideiktischen wird hier auch untersucht, ob das Enkomium die von den Theoretikern wie Aristoteles und Cicero aufgestellten Bedingungen der epideiktischen Rede $erf\"{u}llt$. Nur 'die Apologie' nach der $Formalit\"{a}t$ im Beweis ausgeschlossen, die aber zur Beseitigung des am Gegenstand des Lobes $angeh\"{a}ngten$ Tadelhaften erforderlich ist, entspricht das Enkomium dem Prinzip der epideiktischen Rede: Lob der Tugend wie $Sch\"{o}nheit$ und Adeligkeit, Amplifikation bei der Formulierung, Wirkziel des aesthetischen Genusses. Wenn man die Entstehungszeit dieses Enkomiums $ber\"{u}cksichtigt$, kann man plausibel folgern, dass es eine $fr\"{u}he$ Form der Lobrede ist.

• Proceedings of the Culinary Society of Korean Academy Conference
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• 한국조리학회 2001년도 하계정기학술세미나
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• pp.29-41
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• 2001

This study was conducted to investigate the antimicrobial activity of Prunus mume extracts. Prunus mume extracts have growth inhibitory activity to various microorganisms. Gram positive bacteria such as Bacillus cereus, Bacillus subtilis, Micrococcus leteus, Staphylococcus epidrimidis were more easily inhibited than Gram negative bacteria tested Vibrio parahaemolyticus, Salmonella typhimurium, Escherichia coli, Proteus vulgaris and Yeasts by Prunus mume extracts. Among several fractions of methanol extract, EtOAc & BuOH fractions were showed strong antibacterial activities, but those fractions were not showed on fungi.