• Proceedings of the Korean Vacuum Society Conference
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• 2010.02a
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• pp.127-127
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• 2010

Owing to many advantages on indirect intersubband absorption from the hole miniband to the electron miniband based on the type-II band alignment in InAs/GaSb strained-layer superlattice (SLS), InAs/GaSb SLS infrared photodetector (SLIP) has emerged as a promising system to realize high-detectivity quantum photodetector operating up to room temperature in the spectral range of mid-infrared (MIR) to far-infrared (FIR). In particular, n-barrier-n (n-B-n) structure designed for blocking the majority-carrier dark current makes it possible for MIR/FIR dual-band SLIP whose photoresponse (PR) band can be exclusively selected by the bias polarity. In this study, we present the MIR and FIR photoresponse (PR) mechanism identified by dual-band PR spectra and photoluminescence (PL) profiles taken from InAs/GaSb SLIP. In the MIR/FIR PR spectra measured by changing bias polarity, each spectrum individually shows a series of distinctive peaks related to the transitions from the hole subbands to the conduction one. The PR mechanism at each polarity is discussed in terms of diffusion current, and a superposition of MIR-PR in the FIR-PR spectrum is explained by tunnelling of electrons activated in MIR-SLS. The effective FIR-PR spectrum decomposed into three curves for HH1, LH1, and HH2 has revealed the edge energies of 120, 170, and 220 meV, respectively, and the temperature variation of the MIR-PR edge energies shows that the temperature behavior of the SLS systems can be approximately expressed by the Varshni empirical equation.

• Korea Journal of Hospital Management
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• v.1 no.1
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• pp.1-20
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• 1996

This study is purposed to compare PR activities among the 5 large hospitals in Seoul and Kyonggido. The research methods are used in interview survey for employees and Questionnaires survey for patients or their relatives. The 427 patients or their relatives(response rate: 85.4%) were surveyed. The hospital which is below, is more active than any others in special PR activities. 1. Distribution of hospital information books: E, P, A 2. Distribution of calendar: P 3. Broadcast in hospital: E 4. Education of employees about PR : E, A 5. Education of employees about service: all hospitals are active. The PR sectors are organized under the Department of planning(S,J,E) or CEO(P,A). And the budget of PR activities is almost a similar level among all. The degree of recognition and utilization for PR activities is not different among hopitals by the sociodemographic variables of patients. And the average of correlation ratio between recognition of each hopital's PR activities and its utilization is 62.01%(range:51.29%-67.98%) average.

• Journal of the Korean Vacuum Society
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• v.6 no.2
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• pp.109-113
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• 1997

PR spectra of MBE grown AlGaAs/GaAs MQW have been measured at room temperature using the He-Ne laser and the Ar laser as the pump source. We have observed various subband transition peaks and PR spectra were fitted to standard analytic line shape. Above that results, obtained us transition energy from n=1 conduction band to heavy hole(C1-H1) and to light hole(C1-L1) subband. Photoluminescence(PL) at room temperature showed main peak with a shoulder. Good agreement between PL and PR measured n=1 intersubband transition energies was confirmed that PL main peak with a shoulder is associated with the C1-H1, C1-L1 transition. Additionally, we have calculated the C1-H1 and C1-L1 intersubband energy within envelope function approximation(EFA).

• Journal of Acupuncture Research
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• v.22 no.6
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• pp.1-15
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• 2005

Objectives : The aim of this study was to investigate the effect of Peucedani Radix herbal acupuncture(PR-HA) at St36(joksamni) on ovalbumin-induced asthma in mice. Methods : C57BL/6 mice were sensitized and challenged with OVA(ovalbumin) for 12 weeks(once a week) C57BL/6 mice were injected, inhaled and sprayed with OVA for 12 weeks (3times a week). One of the two experimental groups was just treated with needle-prick on St36 and the other group was treated with 1% concentrations of PR-HAS at St36, for the later 8 weeks (3times /week). Results : 1. The weight and total cells of lung of the mice group treated with PR-HA decreased significantly compared with those of control group. 2. Total Leukocytes and Eosinophils in BALF of the mice group treated with PR-HA decreased significantly compared with those of control group. 3. Eosinophils in BALF of the mice group treated with PR-HA in Photomicrographs decreased significantly compared with those of control group. 4. According to Histological analysis of lung sections, it decreased significantly adhension of collagen in PR-HA than those of control group 5. The concentration of IgE, IL-4, IL-5, in BALF and IL-4, IL-5, Il-13 in serum of the mice group treated with PR-HA decreased significantly compared with that of control group. 6. The number of Gr-1+/CD11b+, CD11b+, CD3-/CCR3+, CD4+, CD3e+/CD69+ , CD23+B220+ cells in the lungs of the mice group treated with PR-HA decreased significantly compared with those of control group. 7. The cytokine's manifestation of mRNA of the mice group treated with PR-HA with RT-PCR decreased significantly compared with that of control group. Conclusion : We conclude that PR-HA is effective on OVA-induced asthma of C57BL/6 mouse.

• Korean Journal of Crystallography
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• v.10 no.2
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• pp.105-109
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• 1999

Ar 기류 하에서 Re(N-C6H3-2,6-i-Pr2)2Cl3(py) (1)과 propionaldehyde (C2H5CHO)가 반응하여 생성된 혼합물에서, [cis-ReCl4(py)(N-C6H3-2,6-i-Pr2)·(NH2-C6H3-2,6-i-Pr2)] (2)가 분리되었다. 이 화합물의 구조가 X-ray 회절법으로 규명되었다. 착물 2의 결정학 자료: 단사정계 공간군 P21/n, a=11.555(1) Å, b=27.066(3) Å, c=11.881(1) Å, β=117.991(8)°, Z=4, R(wR2)=0.0332(0.0851.

• Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
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• v.7
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• pp.85-104
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• 2003

In der vorliegenden Arbeit werden die deutschen Satzmodelle $f\"{u}r$ Zwecke des DaF-Unterrichts in Korea untersucht. Dabei gehen wir davon aus, dass man die deutschen Satzmodelle vergleichend mit den koreanischen neu aufbauen sollte, um sie im Deutschunterricht fur Koraner recht benutzen zu konnen. Dafur haben wir hier zunachst untersucht, wie man die koreanischen Satzmodelle im Hinblick auf den didaktischen Zweck modifizieren muss. Unter $Ber\"{u}cksichtigung$ des dabei erzielten Ergebnisses wurden $anschlie{\ss}end$end die deutschen Satzmodelle rekonstruiert. Im Koreanischen wurden die Satzmodelle ab Ende der 1960er Jahre verschiedenartig untersucht. Zwar gibt es bisher noch keine Arbeit, die Ergebnisse dieser Forschungen zusammenfasst, dennoch versuchen wir hier aus einigen bisherigen Untersuchungen einen begrenzten Rahmen von koreanischen Satzmodellen herauszufinden. Als Resultat haben wir funf grundlegende Satzmolle hergestellt: (1) Subjekt + $Pr\"{a}dikat$, (2) Subjekt + $Pr\"{a}dikativ$ + $Pr\"{a}dikat$, (3) Subjekt + Objektiv + $Pr\"{a}dikat$, (4) Subjekt + Adverbiale + $Pr\"{a}dikat$, (5) Subjekt + Obj. + Obj./$Pr\"{a}dikativ$/Advb. + $Pr\"{a}dikat$. Das Modell (1) $umfa{\ss}t$ drei $Pr\"{a}dikate$, die sich nach den Wortarten unterscheiden: (intransitives) Verb, Adjektiv und Substantiv. Auch beim Fall (5) $k\"{o}nnen$ drei verschiedene Untermodelle nach der $Kombinationsm\"{o}glichkeit$ auftreten: Sub + Obj. + $Pr\"{a}d$., Sub. + Obj. + $Pr\"{a}dikativ$ + $Pr\"{a}d$., Sub. + Obj. + Advb. + $Pr\"{a}d$. Auch im Deutschen kann man ahnlich wie im Koreanischen didaktisch geeignete Satzmodelle herausarbeiten. Auch dabei wurden bisherige Untersuchungen zu den deutschen Satzmodellen herangewgen. Zu der $d\"{a}fur$ $ausgew\"{a}hlten$ Terminologie $geh\"{o}ren$ Subjekt(S), $Pr\"{a}dikat(P)$, $Pr\"{a}dkativerganzung(PE)$, $Objekterg\"{a}nzung(OE)$, $Adverbialerg\"{a}nzung(AE)$. In der deutschen Sprache werden nach den $Valenzm\"{o}glich­keiten$ des $Pr\"{a}dikativteils$ folgende Modelle unterschieden: S + P, S + P + PE, S + P + OE, S + P + AE, S + P + OE + OE/PE/AE. Unter die OE werden okk. OE, dat. OE, $pr\"{a}d$. OE, refl. OE usw. subsumiert. Um die Stichhaltigkeit der in dieser Schrift neu festgestellten Satzmodelle zu $\"{u}berpr\"{u}fen$, sollten sie anhand eines Textkorpus heutiger Texte in weiteren Untersuchungen validiert werden. Ferner ist es zu empfehlen, die Anwendbarkeit der hier vorgestellten Satzrnodelle im Deutschunterricht $f\"{u}r$ Koreaner $gr\"{u}ndlich$ zu testen

• The Transactions of the Korea Information Processing Society
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• v.3 no.1
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• pp.63-76
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• 1996

In this paper, we propose a new dynamic spatial index structure, called PR -file, for handling spatial objects and the modified hierarchical variance which measures the degree of spatial locality at each level. Under the assumption that a multidimensional search space has a circular domain, PR-file uses the modified hierarchical variance for clustering spatially adjacent objects. The insertion and splitting algorithms of PR_file preserve and index which has a low hierarchical variance regardless of object distributions. The simulation result shows that PR- file has a high hit ratio during a retrieval of objects by using an index with low hierarchical variance. And it shows a characteristic that the larger the bucket capacity, the higher the bucket utilization.

• Bulletin of the Korean Chemical Society
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• v.25 no.1
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• pp.90-96
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• 2004

The conformations of dicyclopropyl, isopropyl cyclopropyl, and diisopropylcarbenes were optimized using density functional theory (B3LYP/6-31G(d)). We showed that the optimized geometries of carbenes with cyclopropyl groups are fully in accord with those expected for bisected W-shaped conformations, in which the effective hyperconjugation of a cyclopropyl group with singlet carbene can occur. The stabilization energies were evaluated at the B3LYP/6-311+G(3df, 2p)//B3LYP/6-31G(d) + ZPE level using an isodesmic equation. The relative stability of carbenes is in the order $(c-Pr)_2$C: > (i-Pr)(c-Pr)C: > $(i-Pr)_2$C:, and a cyclopropyl group stabilizes carbene more than an isopropyl group by nearly 9 kcal/mol. Energies for the decomposition of diazo compounds to carbenes increase in the order $(c-Pr)_2$ < (i-Pr)(c-Pr) < $(i-Pr)_2$ by ~9 kcal/mol each. From a singlettriplet energy gap ($E_{ST}$) calculation, the singlet level is lower than the triplet level and the $E_{ST}$ shows a trend similar to the stabilization energy calculations. For comparison, the optimized geometries and stabilization energies for the corresponding carbocations were also studied at the same level of calculation. The greater changes in geometries and the higher stabilization energies for carbocations compared to carbenes can explain the greater hyperconjugation effect.

• Korean Journal Plant Pathology
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• v.14 no.4
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• pp.319-324
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• 1998

Induction of systemic acquired resistance (SAR) against phytophthora blight and pathogenesis-related (PR) protein accumulation by TMV infection in pepper plant (Capsicum annuum cv. Nockwang) were examined to understand the mechanism of the systemic acquired resistance in pepper plant. The zoospore suspension of Phytophthora capsici was inoculated on stem of pepper plant in which TMV-pepper strain had been inoculated on fully expanded upper leaves, and thephytopha blight incidence was examined. Both disease severity and lesion length of phytophthora blight were much smaller in TMV pre-inoculated pepper plant than in uninoculated control plants. The phytophthora blight incidence was decreased about 50% in the TMV pre-inoculated pepper, compared to the uninoculated control plant at 10 days after P. capsici inoculation. Accumulation of PR1 and PR5 proteins in intercellular fluid of TMV-inoculated and uninoculated upper leaves were monitored by immuno-blot with tobacco P1b and PR5a, antibody during induction of SAR. PR1 and PR5 were detected from 24 hours after TMV inoculation in both TMV-inoculated and uninouclated upper leaves, and increased rapidly in TMV-inoculation in uninoculated upper leaves were defoliated. PR5 could be detected upto 20 days after TMV inoculation in uninoculated upper leaves. These results suggest that TMV infection induces SAR against phytophthora blight in pepper plant, and that PR proteins are accumulated very rapidly during induction of SAR and maintained for quite long time in pepper plant.

• The Korea Journal of Herbology
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• v.28 no.3
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• pp.1-5
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• 2013

Objectives : This study was designed to investigate the collagen metabolism and tyrosinase activity of Polygonati Rhizoma extracts (PR). It's effects are to tonify spleen qi and augment the spleen yin. It enrichs the yin and moisten the lung. Methods : The effect of PR on type I procollagen production and collagenase (matrix metalloproteinase-1, henceforth referred as MMP-1) activity in human normal fibroblasts Hs68 after ultraviolet B (UVB, 312 nm) irradiation was measured by ELISA method. The tyrosinase activity after treatment of PR was measured. Results : There were no cytotoxicity at concentrations of 10, 30, $100{\mu}g/ml$. The reduced type I procollagen production was recovered by PR in UVB damaged Hs68 cells at a concentration of $100{\mu}g/ml$ ($16.2{\pm}0.0$ ng/ml) from control group ($13.9{\pm}0.5$ ng/ml). However there was no statistical significance. PR reduced The increased MMP-1 activity after UVB damage at concentrations of $10{\mu}g/ml$, $30{\mu}g/ml$, and $100{\mu}g/ml$ in a dose dependent manner ($42.2{\pm}20.5%$, $44.8{\pm}8.5%$, and $22.0{\pm}5.8%$). PR $100{\mu}g/ml$ treatment showed the statistical significace (p < 0.05). PR significantly reduced the tyrosinase activity at a concentration of 10 mg/ml ($32.0{\pm}12.8%$, p < 0.05). However, the L-DOPA oxidation was not changed. Conclusion : PR showed the anti-wrinkle effects and whitening effects in vitro. Although more researches are needed to validate the efficacy, these results suggest that PR may have potential as an anti-aging ingredient in cosmetic herb markets.