Classical Cepheids (hereafter Cepheids) belong to a class of important variable stars that can be used to determine distances to nearby galaxies via the famous period-luminosity (PL) relations, i.e. the Leavitt Law. In turn, these distances can then be used to calibrate a host of secondary distance indicators located well within the Hubble flow, and ultimately determine the Hubble constant in a manner independent of the Cosmic Microwave Background (CMB) measurements. Some recent progress in determining the Hubble constant to within ~ 3% level via the Cepheid-based distance scale ladder (the SH0ES and the Carnegie Hubble Program) were first summarized in this Proceeding, followed by a brief discussion on the prospect of using ultra-long period Cepheids (ULPC) in future distance scale work. ULPC are those Cepheids with periods longer than 80 days, which seem to follow a different PL relation than their shorter period Cepheids. It has been suggested that ULPC can be used to determine the Hubble constant in "one-step". However, based on the two ULPCs found in M31, it was found that the large dispersion in derived distance moduli leads to a less accurate distance modulus to M31 compared to the classical Cepheids. This finding might raise an alert regarding the use of ULPCs in future distance scale work.

위생적인 수확후처리를 통하여 안전한 농산물 생산을 유도하기 위하여 영양부추를 대상으로 수확후 처리시설 모델을 개발하였으며 개발된 수확후 처리시설 설치와 위생교육이 미생물 안전에 미치는 효과를 검증하고자 본 연구를 수행하였다. 이를 위하여 양주지역 영양부추 생산 농가의 수확 후 처리시설 환경과 영양부추에서 위생지표세균(일반세균수, 대장균군, E. coli)과 병원성미생물(Escherichia coli O157:H7, Salmonella spp., Staphylococcus aureus, Listeria monocytogenes, Bacillus cereus)을 조사하였다. 그 결과, 빗, 칼, 도마 등 수확후 처리시설에서 사용하는 작업도구의 일반세균수 오염수준은 수확후 처리시설 설치농가(A, B)에서 수확후 처리시설 비설치농가(C) 보다 1.44~2.33 log CFU / 100cm² 정도 낮았다. 특히 도마의 경우 A농가에서 1.00 log CFU / 100cm²이하, B 농가에서 2.23 logCFU / 100cm²인데 반해 C 농가에서는 6.03 log CFU / 100cm²로 농가간의 위생 상태에 따라 B. cereus의 오염수준이 차이가 크게 나타났다. 또한 지하수에 침지 한 영양부추에서 침지 전 보다 대장균군이 0.57~1.89 log CFU/g이 증가하였다. E. coli는 영양부추, 침지한 후 지하수, 토양에서 검출되었으며, E. coli O157:H7, Salmonella spp., L. monocytogenes는 검출되지 않았다. 따라서 본 연구의 결과를 통하여 소규모 수확 후 처리시설 설치와 위생교육을 통하여 농가 내 수확후처리 환경의 위생을 개선하는데 효과적이라 판단된다. 이와 더불어 유해미생물에 의한 식중독사고를 사전에 예방하기 위해서는 수확 후에 오염된 유해미생물을 저감화 할 수 있는 세척, 소독 기술의 개발과 도입이 필요할 것으로 사료된다.

The Horizon Run 4 is a cosmological N-body simulation designed for the study of coupled evolution between galaxies and large-scale structures of the Universe, and for the test of galaxy formation models. Using 63003 gravitating particles in a cubic box of Lbox = 3150 h−1Mpc, we build a dense forest of halo merger trees to trace the halo merger history with a halo mass resolution scale down to Ms = 2.7 × 1011h−1M⊙. We build a set of particle and halo data, which can serve as testbeds for comparison of cosmological models and gravitational theories with observations. We find that the FoF halo mass function shows a substantial deviation from the universal form with tangible redshift evolution of amplitude and shape. At higher redshifts, the amplitude of the mass function is lower, and the functional form is shifted toward larger values of ln(1/σ). We also find that the baryonic acoustic oscillation feature in the two-point correlation function of mock galaxies becomes broader with a peak position moving to smaller scales and the peak amplitude decreasing for increasing directional cosine μ compared to the linear predictions. From the halo merger trees built from halo data at 75 redshifts, we measure the half-mass epoch of halos and find that less massive halos tend to reach half of their current mass at higher redshifts. Simulation outputs including snapshot data, past lightcone space data, and halo merger data are available at http://sdss.kias.re.kr/astro/Horizon-Run4.

최근 조직의 커뮤니케이션에서 공중들이 중요하게 인식 및 평가하고 있는 진정성은 다양한 분야에서 연구들이 급증하고 있으나 서로 다른 개념적 정의와 측정으로 인하여 진정성 개념의 타당성과 다차원성에서 이론적 한계를 지니고 있다. 이에 본 연구는 보편적으로 사용가능한 커뮤니케이션 진정성의 측정을 위한 다차원적 개념의 표준 척도를 개발하고 대표적인 PR 활동인 CSR과 위기관리 분야에서의 차이를 살펴보고자 하였다. 기존 연구들을 바탕으로 도출한 21개의 측정항목들을 가지고 탐색적 요인분석을 한 결과에서 진정성은 이성적(진실성), 감성적(진심성), 그리고 행동적(실천성) 3가지 차원으로 구성됨을 확인하였다. 그리고 사전적 성향의 PR 활동인 CSR의 경우는 행동적 진정성이, 사후적 PR 활동인 위기관리 커뮤니케이션에서는 감성적 진정성이 다른 차원들보다 더욱 크게 공중의 커뮤니케이션 진정성 인식에 영향을 주는 것임을 알 수 있었다. 결국 커뮤니케이션 진정성은 진심, 진실, 실천의 의미를 포함하는 이성적, 감성적, 행동적 차원으로 구성된 다차원적 구성개념이라는 것이 확인되었다.

The masses of supermassive black holes in active galactic nuclei (AGN) can be derived spec- troscopically via virial mass estimators based on selected broad optical/ultraviolet emission lines. These estimates commonly use the line width as a proxy for the gas speed and the monochromatic continuum luminosity, λLλ, as a proxy for the radius of the broad line region. However, if the size of the broad line region scales with the bolometric AGN luminosity rather than λLλ, mass estimates based on different emission lines will show a systematic discrepancy which is a function of the color of the AGN continuum. This has actually been observed in mass estimates based on Hα/Hβ and Civ lines, indicating that AGN broad line regions indeed scale with bolometric luminosity. Given that this effect seems to have been overlooked as yet, currently used single-epoch mass estimates are likely to be biased.

Theoretically, the meanings attached to luxury brands have been thought to be integrated in consumers’ identities, yet this possibility has not yet been explicitly investigated. This paper describes the development of a 23-item instrument for assessing the enrichment of an individual's personal identity through their identity as a luxury consumer. An exploratory factor analysis on data from a survey using this instrument indicates the existence of five factors (unburdening, pleasure, impressiveness, sensation and connectedness). The scale has a variety of potential applications and can serve as a framework for further empirical research.

This study examines how native English speaking (NES) and Korean non-native English speaking (KNES) teachers assess L2 writing performance. More specifically, this study aims to investigate whether these two groups of raters evaluate writing samples differently when using different rating scales (holistic vs. analytic) and different task types (narrative vs. argumentative). Four NES and four KNES raters evaluated 78 narrative and 78 argumentative essays written by Korean EFL university students using both holistic and analytic rating rubrics. The comparison between the two rater groups indicated that the scores given by the two groups were statistically significantly different for both holistic and analytic ratings regardless of the two task types investigated. Overall, KNES teachers rated the essays more harshly than their NES counterparts, irrespective of task type and rating scale. Multiple regression analysis of five analytic sub-criteria revealed that the two rater groups demonstrated similar patterns in assessing argumentative essays, while for narrative essays, the relative influence of each analytic sub-criterion on overall writing quality differed for the two rater groups. Implications for L2 writing assessment are included.

지형적인 형태와 지표면의 물리적인 특성은 기상장 뿐 만 아니라 대기질 수치 모델링에서도 가장 중요한 입력 변수가 된다. 대부분 복잡지형에서 일어나는 국지적인 기상의 일변동들이 지형적인 불균일성에 의해 지배되기도 한다. 이러한 지형적인 특징들은 열적으로 유도된 대기흐름에 영향을 일으키며 직접적으로는 풍계의 변화를 가져오거나 지표면 가열 온도 자체에서의 중요한 변화를 가져와 간접적으로 영향을 주기도 한다. 복잡지형에서 이러한 변화양상들은 지형적인 특징 즉, 지형적 경사와 성질에 의한 태양복사 에너지의 불균등한 분배에 기인한다. 그러므로 기상장 묘사가 어려운 복잡지형에서는 관측값에 더 가까운 정확한 바람장을 예측하기 위해 상세한 지형 정보와 지표면 자료가 중요하게 된다. 본 연구에서는 상세한 지표면과 지형자료를 지표 경계자료로 활용한 MM5-A2C 모델을 이용하여 복잡한 지형적 조건을 가진 산지지역에서의 바람장 수치모의를 하고자 한다. MM5-A2C에 의해 유도된 기상장은 국지규모의 산지주변에서의 지형강제력에 의한 기상장 해석을 정밀하게 예측하여 모델 내의 지형적 조건이 미치는 영향에 대해 직접적인 영향을 주고 있음을 알 수 있었다.

목적 : 행동적 편측무시를 평가하는 Catherine Bergego Scale (CBS)을 한국어로 번안하여 신뢰도와 타당도를 검증하기 위함에 있다. 연구방법 : 한국형 캐서린 버지고 척도(Korean Catherine Bergego Scale; K-CBS)의 개발을 위해 원 도구 개발자에게 한국에서의 번안과 사용을 허락 받았다. CBS 원문을 한글로 번안하여 번역-역번역 기 법에 따라 번역타당도를 구하고, 9명의 전문가에게 내용타당도를 확인하였다. 선 나누기 검사와 알버트 검사와의 상관계수를 이용하여 수렴타당도를 구하고, 요인분석을 통하여 구성타당도를 구하였다. 신뢰도 검증을 위해 내적일관성(Cronbach’s α와 항목이 삭제된 경우 Cronbach’s α)을 구하였다. 자료수집은 서울시에 소재한 병원에 입원, 외래로 재활치료를 받는 뇌졸중으로 인한 왼쪽 편마비 환자 127명을 대 상으로 2013년 10월부터 2014년 04월까지 진행되었다. 결과 : 번역-역번역 기법에 따라 번역타당도가 수립되었고, 전문가에 의한 내용타당도지수는 .98로 매우 높게 나타났다. 수렴타당도는 Pearson 상관계수가 선 나누기 검사(r=.719), 알버트 검사(r=.671)로 K-CBS와의 상관관계가 있는 것으로 나타났다. 구성타당도를 위한 요인분석 결과 10개의 항목이 모두 하나의 요인으로 묶였다. 내적일관성은 .956으로 항목간 관련성이 높은 것으로 나타났고, 해당 문항이 제거 되었을 때의 Cronbach’s α값보다 높아지는 항목은 없었다. 결론 : K-CBS는 한국에 거주하는 뇌졸중 환자들에게 적용하였을 때 행동적 편측무시를 평가하는 도구로 써 높은 수준의 신뢰도와 타당도가 검증되어 국내에서의 적용가능성을 보여주었다. 추후에는 K-CBS의 임상에서의 활용도를 높이기 위해 검사자간, 검사자내 신뢰도 검증 등 다양한 후속 연구들이 진행되어야 할 것이다. 주제어 : 뇌졸중, 신뢰도, 타당도, 편측무시, 한국형 캐서린 버지고 척도

The purpose of this study is to identify the flow resistance of the bottom pair trawl nets. The bottom pair trawl nets being used in fishing vessel (100G/T, 550ps) was selected as a full-scale net, and 1/10, 1/25 and 1/50 of the model nets were made. Converted into the full-scale net by Tauti’s modeling rule and Kim’s modeling rule, when resistance coefficient k of each net was calculated by substituting into above equation for flow resistance R and wall area of nets S values of each net v. Because resistant coefficient k decreases exponentially according as flow velocity v increases to make k cv-m, c and m values of each net were compared. As a result, as the model was smaller, c and m values was smaller in the two rule into standard of 1/10 model value, decrease degree of 1/25 model was almost same in the two rule, decrease degree of 1/50 model was very big in Tauti’s modeling rule. Therefore, in the result of experiment, because average of c and m values for similarly 1/10 and 1/25 model were given c=4.9 (kgf․s2/m4) and m=0.45, R (kgf) of bottom pair trawl net could show R =4.9Sv1.55 using these values. As in the order of cod-end, wing and bag part for 1/25 and 1/50 model net were removed in turn, measured flow resistance of each, converted into the full-scale, total resistance of the net and the resistance of each part net were calculated. The resistance ratio of each part for total net was not same in 1/25 and 1/50 model each other, but average of two nets was perfectly same area ratio of each part as the wing, bag and cod-end part was 43%, 45% and 12%. However, the resistance of each part divided area of the part, calculated the resistance of per unit area, wing and bag part were not big difference each other, while the resistance of cod-end part was very large.

We present observational results from optical long-slit spectroscopy of parsec-scale jets of DG Tau. From HH 158 and HH 702, the optical emission lines of H, [O i] 6300, 6363, [N ii] 6548, 6584, and [S ii] 6716, 6731 are obtained. The kinematics and physical properties (i.e., electron density, electron temperature, ionization fraction, and mass-loss rate) are investigated along the blueshifted jet up to 650′′ distance from the source. For HH 158, the radial velocity ranges from -50 to -250 km s-1. The proper motion of the knots is 0:′′196 - 0:′′272 yr-1. The electron density is 104 cm-3 close to the star, and decreases to 102 cm-3 at 14′′ away from the star. Ionization fraction indicates that the gas is almost neutral in the vicinity of the source. It increases up to over 0.4 along the distance. HH 702 is located at 650′′ from the source. It shows  -80 km s-1 in the radial velocity. Its line ratios are similar to those at knot C of HH 158. The mass-loss rate is estimated to be about  10-7 M⊙ yr-1, which is similar to values obtained from previous studies.

In this study, a real-scale specimen of Steel-Confined Prestressed Concrete (SCP) composite girder was tested in a three points bending. Furthermore, vibration tests were performed to verify the dynamic stability of the SCP composite girder for railway bridges. The results of the experimental test were similar to stable rigidity behavior until the static actuator limit load (6300 kN). That is, the SCP composite girder showed a stable rigidity behavior in the ultimate load (3,174 kN) as well as the service load (1,076 kN). Finally, the possibility of resonance of the SCP composite girder has been found to be low.

An experiment have been conducted to investigate the behavior of dredged fills on flexible containers (scale model geotextile tubes). The study was focused on the development of geotextile strain. The model geotextile tube is made of woven geotextile material. Results showed that during the dewatering stage, the tube height decreases and the tube width increases. This increases the density of the confined fill material and the tensile reaction of the tube. The compaction effect on top of the geotextile tube decreases as the tube height reduces. On the other hand, the confinement effect at the sides of the geotextile tube increases as the tensile reaction intensifies. As a result, The geotextile strain increases as the value of the coefficient of lateral pressure is increased.

The German cockroach, Blatella germanica, is one of the most important household pest that can cause disease on human. Conventional contact insecticides show less efficacy because it is hard to be contacted or digested by cockroach that lives inside small crevice. Ethyl formate(EF), which is a potential fumigant to control various insect pests such as stored grain insects and quarantine pests, can be penetrated wherever air exist and shows toxicity on respiratory system of insect. In this trials, we've demonstrated practical and commercial scale fumigations of EF on German cockroach. Efficacy of EF was described in terms of concentration × time (CT) product. At practical fumigation, EF gave 100% control of German cockroach nymph and adult when the CT product was 43.2g h m-3. When 600m3 scale warehouse fumigation for 15 hours with 5g m-3 of EF, nymph and adult stage of German cockroach were completely controlled. The ventilation time to reduce EF concentration under TLV(Threshold Limit Value, EF=100ppm) was less than 1 hour. These results show that EF can be applied at warehouse or mill house to control German cockroach effectively.

A microencapsulated cinnamon oil (CO)-coated film was developed using a pilot-plant scale film coating system. CO microencapsulated with polyvinyl alcohol was incorporated with a printing ink and the ink mixture was applied to the surface of a polypropylene (PP) film as an ink coating using a gravure printing press at a speed of 20-200 m/min. The tensile strength, percentage elongation at break, elastic modulus, and water vapor permeability of the PP films with and without coating with the microcapsules were not significantly different (p > 0.05), which indicates that the coating did not alter those properties of the films. Microencapsulation effectively prevented the volatilization of CO in the films. The microencapsulated system may be extended to other food-packaging films for which the same ink-printing platform is used. The results from this study imply that the oil-microencapsulated films could be potentially produced by a modern film manufacturing system.

Visual census and hydro-acoustic survey was carried out at Ulju small scale marine ranching area (MRA) to estimate demersal fish aggregations on September and November 2013. In this hydro-acoustic survey, the authors combined an image sonar with a scientific echo sounder to monitor an underwater situation and compare two acoustic data. Consequently, visual census survey was useful to estimate fish species composition for hydro-acoustic survey, because it is easy to identify aggregated fish species and overcome limits on a fishing depth and ability of an conventional fishing gear like a bottom gill-net or a fish trap at marine ranching area. Mean fish density was estimated as 0.757 g/m2 on September and 0.219 g/m2 on November and Fish abundance was finally calculated as 1.51ton (coefficient of variation, CV=13.1%) on September and 0.44ton (CV=47.7%) on November, respectively. Hydro-acoustic survey combined with the image sonar was useful to monitor fish aggregations and estimate fish stocks around artificial reefs at shallow coastal MRA. We were able to easily identify the underwater structures like an artificial reef and a fishing rope as well as fish aggregations from image sonar data. Therefore, the method was effective to separate unwanted echo signals in acoustic data of scientific echo sounder.