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        검색결과 288

        42.
        2017.04 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        We investigate two abnormal CME-Storm pairs that occurred on 2014 September 10 - 12 and 2015 March 15 - 17, respectively. The first one was a moderate geomagnetic storm (Dstmin  -75 nT) driven by the X1.6 high speed flare-associated CME (1267 km s−1) in AR 12158 (N14E02) near solar disk center. The other was a very intense geomagnetic storm (Dstmin  -223 nT) caused by a CME with moderate speed (719 km s−1) and associated with a filament eruption accompanied by a weak flare (C9.1) in AR 12297 (S17W38). Both CMEs have large direction parameters facing the Earth and southward magnetic field orientation in their solar source region. In this study, we inspect the structure of Interplanetary Flux Ropes (IFRs) at the Earth estimated by using the torus fitting technique assuming self-similar expansion. As results, we find that the moderate storm on 2014 September 12 was caused by small-scale southward magnetic fields in the sheath region ahead of the IFR. The Earth traversed the portion of the IFR where only the northward fields are observed. Meanwhile, in case of the 2015 March 17 storm, our IFR analysis revealed that the Earth passed the very portion where only the southward magnetic fields are observed throughout the passage. The resultant southward magnetic field with long- duration is the main cause of the intense storm. We suggest that 3D magnetic field geometry of an IFR at the IFR-Earth encounter is important and the strength of a geomagnetic storm is strongly affected by the relative location of the Earth with respect to the IFR structure.
        4,200원
        43.
        2017.03 KCI 등재 구독 인증기관 무료, 개인회원 유료
        In an aquatic environment, toxicity of metals to organisms depends on external factors (type of metal, exposure concentration and duration, environmental parameters, and water quality) and intracellular processes (metal-binding sites and detoxification). Toxicity of copper (Cu) on the marine microalga Tetraselmis suecica was investigated in this study. Dose-dependent (Cu concentration dependent) inhibition of growth and cell division, as well as, variation of intra- and extra-cellular Cu, Fe and Zn content was observed. T. suecica was sensitive to Cu; the 96 h EC50 (concentration to inhibit growth-rate by 50%) of growth rate (μ) (21.73 μM L-1), cell division day-1 (18.39 μM L-1), and cells mL-1 (13.25 μM L-1) demonstrate the toxicity of Cu on this microalga. High intra- (19.86 Pg cell-1) and extra-cellular (54.73 Pg cell-1) Cu concentrations were recorded, on exposure to 24.3 and 72.9 μM L-1 of Cu.
        4,500원
        49.
        2016.07 구독 인증기관 무료, 개인회원 유료
        Retail therapy occurs when consumers shop to improve negative feelings rather than merely acquire a needed product (Kang & Johnson, 2011). Retailers in all channels enable consumers to have positive emotional responses by providing them with positive experiences. Pine and Gilmore (1999) identified four types of experiences sought by consumers: entertainment, education, escapism, and esthetics (i.e., 4Es). It is not known which, if any, of the 4Es motivate offline and online retail therapy shopping trips. Retail therapy shoppers may seek different benefits in open, online stores (where they have a great deal of freedom) versus closed, brick-and-mortar stores (where they are limited by time and space) (Bhate & Hannam, 2014). When retail therapy shoppers have experiences they desire, they should experience positive emotional reactions (i.e., pleasure, arousal) (Donovan & Rossiter, 1982). Furthermore, consumers who experience positive emotional reactions tend to display impulse buying behavior (Chang, Eckman, & Yan, 2011). Engaging in impulse buying while retail therapy shopping may encourage compulsive buying behavior (Kang & Johnson, 2011), the most severe form of which is shopping addiction (Edwards, 1993). Based on this collection of previous research, the following hypotheses were developed: H1: Among retail therapy shoppers, the amount of a) entertainment b) education, c) escapism, and d) esthetics sought will be significantly different between 1) offline stores and 2) online stores. H2: Retail therapy behavior will be positively related to level of a) pleasure and b) arousal experienced while shopping. H3a: Level of pleasure experienced while shopping will be positively related to impulse buying behavior. H3b. Level of arousal experienced while shopping will be positively related to impulse buying behavior. H4: Among retail therapy shoppers, impulse buying behavior will be positively related to shopping addiction behavior.Method Using Amazon’s MTurk, 409 consumers (62.6% female; 72.0% Caucasian; 36.5% 30-39 years old) were recruited for an online survey. Participants were first asked to indicate if they had experience shopping for clothing to improve their mood. Clothing was selected as the focus of the study because it is a gender-neutral product frequently purchased during retail therapy (Atalay & Meloy, 2011). Only participants who had engaged in retail therapy behavior were asked to complete the rest of the questionnaire. The next five sections of the questionnaire contained multi-item, 7-point, Likert-type scales previously used to assess the variables in the study. Demographic information was also collected. Results To test H1, a series of t-tests was conducted to compare the benefits sought by retail therapy shoppers in open and closed settings. The means for each of the 4 Es were significantly greater for the closed setting of the store than the open setting of the website. Therefore, H1 was supported. Two regression models were created to test H2a and b. The coefficients for retail therapy were positively and significantly related to pleasure (β = .87; t = 35.70; p < 0.000) and arousal (β = .85; t = 32.52; p < 0.00). Thus, H2a and b were both supported. To examine H3a and b, another regression model was created. The coefficients for pleasure (β = .25; t = 4.51; p < 0.00) and arousal (β = .64; t = 11.69; p < 0.00) were positive and significant. Thus, H3a and H3b were both supported. Lastly, to test H4, a final regression model was created. The coefficient for impulse buying behavior (β = .93; t = 51.49; p < 0.00) was positive and significant, supporting H4. Discussion The results of the present study shed light on retail therapy shopping behavior. Consumers do seek the 4Es when therapeutically shopping for clothing, and they seek the 4Es to a greater degree in closed, offline environments. Perhaps the need to delay gratification in offline stores raises expectations of experiences that can be received immediately in online stores. Participants experienced pleasure and arousal when engaging in retail therapy behavior, thereby supporting researchers (Kang & Johnson, 2011) who conceptualized retail therapy behavior as mood-alleviative consumption behavior. The positive emotions experienced while clothing shopping were related to retail therapy shoppers’ impulse buying behavior, which was positively related to shopping addiction. The success experienced by individuals who engage in shopping behavior to improve their mood seems to encourage future shopping trips to enhance positive emotions. Thus, a troubling pattern of overconsumption may develop if retail therapy shoppers do not find additional methods for mood-alleviation.
        3,000원
        50.
        2016.06 KCI 등재 SCOPUS 구독 인증기관 무료, 개인회원 유료
        We report the characterization of a massive (mp = 3:91:4Mjup) microlensing planet (OGLE- 2015-BLG-0954Lb) orbiting an M dwarf host (M = 0:33  0:12M ) at a distance toward the Galactic bulge of 0:6+0:4 􀀀0:2 kpc, which is extremely nearby by microlensing standards. The planet-host projected separation is a?  1:2AU. The characterization was made possible by the wide- eld (4 deg2) high cadence (􀀀 = 6 hr􀀀1) monitoring of the Korea Microlensing Telescope Network (KMTNet), which had two of its three telescopes in commissioning operations at the time of the planetary anomaly. The source crossing time t = 16 min is among the shortest ever published. The high-cadence, wide- eld observations that are the hallmark of KMTNet are the only way to routinely capture such short crossings. High-cadence resolution of short caustic crossings will preferentially lead to mass and distance measurements for the lens. This is because the short crossing time typically implies a nearby lens, which enables the measurement of additional e ects (bright lens and/or microlens parallax). When combined with the measured crossing time, these e ects can yield planet/host masses and distance.
        4,000원
        53.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We have designed and built three cost effective observatories, in distinct models, which can house Schmidt - Cassegrain type small telescopes having aperture sizes up to 16 inches. Using the available small telescopes, we provided the people of Manipura State in the far north-east corner of India the opportunity to observe directly with their own eyes the rare, spectacular events of the solar eclipse of January 15, 2010, lunar eclipse of December 10, 2011 and the transit of Venus of June 6, 2012. Apart from sharing a platform with the public for astronomy education and popularization through public outreach programs such as workshops, seminars and night watch programs, we have also developed a laboratory infrastructure and gained expertise in observational techniques based on photoelectric photometry, CCD imaging, CCD photometry and spectroscopy. Our team has become a partner in the ongoing international `Orion project' headquartered in Phoenix, Arizona, USA which will be producing high quality photometric and spectroscopic data for five stars in the Orion constellation, namely Betelgeuse (alpha Orionis), Rigel (beta Orionis), Mintaka (delta Orionis), Alnilam (epsilon Orionis) and Alnitak (zeta Orionis). In the present paper, the authors would like to give a detailed report of their activities for the growth of astronomy in the state of Manipur, India.
        3,000원
        54.
        2015.09 KCI 등재 구독 인증기관 무료, 개인회원 유료
        We use ALLWISE data release W1- and W2-band epoch photometry collected by the Wide-Field Infrared Survey Explorer (WISE) to determine slopes of the period-luminosity relations for RR Lyrae stars in 15 globular clusters in the corresponding bands. We further combine these results with V- and K-band photometry of Galactic field RR Lyrae stars to determine the metallicity slopes of the log PF - [Fe/H]-MK, log PF - [Fe/H]-MW1, and log PF - [Fe/H]- MW2 period-metallicity-luminosity relations. We infer the zero points of these relations and determine the kinematical parameters of thick-disk and halo RR Lyraes via statistical parallax, and estimate the RR Lyrae-based distances to 18 Local-Group galaxies including the center of the Milky Way.
        4,000원
        55.
        2015.06 구독 인증기관 무료, 개인회원 유료
        We have examined the antecedents of luxury consumption by conducting a thorough review of literature. Valid scale items for measuring psychological, personal, social, cultural antecedents of luxury consumption in India are proposed. Using Factor Analysis on a sample of 550 responses of the scale items, we have developed a valid questionnaire for Indian luxury consumers. The proposed questionnaire is relevant in context of the proposed model and luxury consumption in India. The proposed questionnaire achieves parsimony in terms of reducing the cardinality of the set of items from 141 to 55.
        5,400원
        56.
        2015.06 구독 인증기관·개인회원 무료
        This research examines the effect of luxury brand's logo on disparity between explicit and implicit attitudes. Using implicit association test, the results show that there is no correlation between implicit attitude and explicit attitude towrd a luxury product when luxury brand's logo is present (i.e., Prada). In contrast, implicit attitude and explicit attitude are negatively correlated when luxury logo is absent (i.e., Bottega Veneta).
        57.
        2015.05 구독 인증기관 무료, 개인회원 유료
        Pigs are considered an ideal source of human disease model due to their physiological similarities to humans. However, the low efficiency of in vitro embryo production (IVP) is still a major barrier in the production of pig offspring with gene manipulation. Despite ongoing advances in the associated technologies, the developmental capacity of IVP pig embryos is still lower than that of their in vivo counterparts, as well as IVP embryos of other species (e.g., cattle and mice). The efficiency of IVP can be influenced by many factors that affect various critical steps in the process. The previous relevant reviews have focused on the in vitro maturation system, in vitro culture conditions, in vitro fertilization medium, issues with polyspermy, the utilized technologies, etc. In this review, we concentrate on factors that have not been fully detailed in prior reviews, such as the oocyte morphology, oocyte recovery methods, denuding procedures, first polar body morphology and embryo quality.
        4,000원
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