• 지식경영연구
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• 제24권1호
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• pp.173-193
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• 2023

조직유효성은 오랫동안 조직 연구의 가장 중심적인 주제가 되어 왔지만, 그 개념은 연구목적과 연구대상에 따라 조작적 정의가 다양할 뿐만 아니라, 여러 가지 측정 요소로 구성되는 불확정 개념으로 보편적인 합의가 이루어지지 않고 있다. 본 리뷰에서는 공공조직과 사조직, 연구조직과 생산조직 등 연구대상의 유형별로 측정변수를 파악하여 하위변수로 가장 많이 연구되었던 심리적 지표였던 직무만족과 조직몰입에 대해 살펴보았으며, 향후 조직유효성 관련 연구의 방향과 주제를 설정하고 확장시켜 나가는 데 공헌하고자 하였다.

• 동양고전연구
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• 제66호
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• pp.35-73
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• 2017

본고는 그동안 학계에 잘 알려져 있지 않았던 홍천사(紅泉社)라는 시사를 소개하고, 그 시세계를 살펴보았다. 홍천사는 1817년(순조17)에 이만수(李晩秀)(1752~1820)를 맹주로 하여, 이락수(李洛秀)(1755~?) 신진(申縉)(1756~?) 신작(申綽)(1760~1828) 신현(申絢)(1764~1827) 및 박종우(朴宗羽)(1745~?) 정수구(鄭遂龜)(1750~?) 권식(權?)(1753~?) 김계온(金啓溫)(1773~?)이 함께 모여서 결성한 시사이다. 홍천사에서 창작된 시들은 "천사집(泉社集)"으로 엮어져, 이만수의 문집인 "극원유고(?園遺稿)"에 수록되었다. 홍천사는 이만수를 맹주로 하고, 신진 신작 신현 3형제를 주축으로 하여 결성되었다. 이 시사는 1817년부터 이만수가 세상을 떠나는 1820년까지 계속되었다. 홍천사의 동인들은 주로 기대(企臺)의 방운루(放雲樓)에 모여 분운시, 차운시, 연구시 등을 지으며 풍류를 즐겼다. 이들이 지은 시는 "천사집"에 수록되어 있는데, "천사집"이 이만수의 개인 문집인 "극원유고"의 일부로 편차된 탓에, 이만수 이외의 인물들이 시회에서 지은 분운시 차운시는 "천사집"에 실려 있지 않다. 따라서 본고에서는 부득이하게 연구시를 중심으로 홍천사의 시세계를 조망하였다. 홍천사의 연구시는 먼저 홍천사 동인들이 각자의 시재를 겨루는 장으로서 기능하고 있다. 홍천사 동인들은 전고를 화려하게 사용하여 자신들의 능력을 드러냈다. 홍천사 동인들은 연구시를 지을 때, 함축된 시어 안에서 대를 맞추기 위해 다각도로 노력하였다. 특히 <성남연구(城南聯句)>의 형식을 본 뜬 <방운루연구(放雲樓聯句)>에서는 홍천사 동인들이 서로 시재를 각축하며 시상을 매끄럽게 전개해 나가는 모습이 뚜렷하게 드러났다. 이는 홍천사의 동인들이 비록 그동안 학계에서 주목받은 인물들은 아니지만, 일정 수준의 문학적 역량을 갖춘 이들이었음을 보여준다. 다음으로 정서의 공유라는 측면에서 홍천사의 연구시를 분석해보았다. 홍천사의 연구시에도 다른 이들의 연구시와 마찬가지로 교유의 즐거움이 전반적으로 드러난다. 특히 노년에 벗들과 즐기는 한아(閒雅)한 정취가 주된 정서를 이루고 있다. 그런데 홍천사의 연구시는 단순히 노년에 즐기는 벗들과의 우정을 읊은 데에 그치지 않고, 자신들이 풍류를 즐길 수 있는 것은 왕의 덕택이라며 태평성대를 예찬하고 있다. 즉 홍천사의 연구시에는 산림 생활의 한가로움, 태평성대의 풍요로움, 관료로서의 자부심 등이 드러난다.

• 한국농공학회논문집
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• 제54권6호
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• pp.65-76
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• 2012

Agricultural reservoir water quality simulation model (ARSIM-rev) was developed in this study for water quality simulation of a small and shallow agricultural reservoir with limited observed water quality data. Developed ARSIM-rev is a zero-dimensional water quality model because of little spatial differences in water quality between stations in a small and shallow agricultural reservoir. ARSIM-rev used same water quality reaction equations with WASP except for several equations, and daily based input parameters such as settling rate, release rate from sediment, and light extinction coefficient changed yearly based input parameters in ARSIM-rev. A number of pre- and post-processors were developed such as auto calibration and scenario analysis for ARSIM-rev. CE-QUAL-W2, WASP, and developed ARSIM-rev were applied to Mansu agricultural reservoir to evaluate model performance, and ARSIM-rev demonstrated similar model performance with CE-QUAL-W2 and WASP when low number of observed data was used for agricultural reservoir water quality simulation. Overall, developed ARSIM-rev was feasible for water quality simulation in a small and shallow agricultural reservoir with limited observed water quality data, and it can simulate agricultural reservoir water quality precisely enough like common water quality model such as CE-QUAL-W2 and WASP within a limited time.

• 자동차안전학회지
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• 제7권1호
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• pp.27-32
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• 2015

In order to protect occupant during car crash accident, Regulation and NCAP(New Car assessment Program) have been developed among various countries like U.S.A., Europe, Korea and Australia. Especially NCAP scores affect to sales of vehicles. So vehicle makers are trying to get good score in NCAP. Low leg injuries play an important role in Australia and Euro NCAP and these injuries are related with footrest design. Optimization of footrest design in early stage of vehicle development is necessary to obtain better and robust results of low legs during crash tests. In this paper, DFSS method and finite element model were used to optimize the low leg performance in small RHD vehicles. Compared with the lower leg injury of base model, the lower leg injury of proposed model was slightly improved and robustness was enhanced also.

• Bulletin of the Korean Chemical Society
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• 제34권1호
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• pp.107-111
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• 2013

A new green-emitting material with donor-acceptor architecture, 3,7-bis(1'-phenylbenzimidazole-2'-yl)-10-phenylphenothiazine (BBPP) was synthesized and its thermal, optical, and electroluminescent characteristics were investigated. Organic light-emitting diodes (OLEDs) with four different multilayer structures were prepared using BBPP as an emitting layer. The optimized device with the structure of [ITO/2-TNATA (40 nm)/BBPP (30 nm)/TPBi (30 nm)/Alq3 (10 nm)/LiF (1 nm)/Al (100 nm)] exhibited efficient green emission. Enhanced charge carrier balance and electron mobility in the organic layers enabled the device to demonstrate a maximum luminance of 31,300 cd/$m^2$, a luminous efficiency of 6.83 cd/A, and an external quantum efficiency of 1.62% with the CIE 1931 chromaticity coordinates of (0.21, 0.53) at a current density of 100 mA/$cm^2$.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2017년도 제48회 춘계학술대회논문집
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• pp.14-20
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• 2017

본 논문은 한국형발사체(KSLV-II) 발사대시스템 상세설계 단계 중 수행된 산화제 충전 운용 설계를 검증하고자, 나로호 1차 비행 시험 실증 자료과 해당 설계 모델링 유동 해석 결과를 비교하였다. 나로호 비행 시험에 적용되었던 공급 조건과 충전모드에 따른 유량조절밸브 개도와 구동 절차 조건을 한국형발사체 발사대시스템 상세설계 모델링에 적용하여, 실증 자료와 모델링의 산화제 공급 유량값과 주요 압력값을 비교하였다.

• 한국초전도ㆍ저온공학회논문지
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• 제16권2호
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• pp.64-69
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• 2014

Measuring an exact amount of remaining cryogenic liquid propellant under microgravity condition is one of the important issues of rocket vehicle. A Pressure-Volume-Temperature (PVT) gauging method is attractive due to its minimal additional hardware and simple gauging process. In this paper, PVT gauging method using liquid nitrogen is investigated under microgravity condition with parabolic flight. A 9.2 litre metal cryogenic liquid storage tank containing approximately 30% of liquid nitrogen is pressurized by ambient temperature helium gas. During microgravity condition, the inside of the liquid tank becomes near-isothermal condition within 1 K difference indicated by 6 silicon diode sensors vertically distributed in the middle of the liquid tank. Helium injection with higher mass flow rate after 10 seconds of the waiting time results in successful measurements of helium partial pressure in the tank. Average liquid volume measurement error is within 11% of the whole liquid tank volume and standard deviation of errors is 11.9. As a result, the applicability of PVT gauging method to liquid propellant stored in space is proven with good measurement accuracy.

• The Plant Pathology Journal
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• 제33권4호
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• pp.434-439
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• 2017

Incidence rates of diseases in kiwiberry orchards were investigated monthly from late June to late September in Gwangyang and Boseong in 2015 and 2016. The impact of postharvest fruit rot was investigated during ripening after harvest. Bacterial canker was only observed on one single tree in 2015, but black rot, powdery mildew, leaf spot and blight, and postharvest fruit rot diseases were problematic throughout the study period in both 2015 and 2016. Incidence rates of the diseases varied with kiwiberry cultivar, region and sampling time. Incidence rates of powdery mildew, leaf spot and blight diseases increased significantly during the late growing stages near fruit harvest, while black rot peaked in late August. Incidence rate of postharvest fruit rot on fruit without fruit stalks was less than half of fruit with fruit stalks, regardless of kiwiberry cultivars. Among the four cultivars, Mansu was relatively resistant to black rot and postharvest fruit rot diseases. In our knowledge, this is the first report of various potential pathogens of kiwiberry in Korea.

• 한국환경보건학회지
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• 제46권5호
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• pp.504-512
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• 2020

Objective: The purpose of this study was to evaluate the indoor to outdoor ratio (I/O ratio) of time activity patterns affecting PM_2.5 concentrations in homes in Korea through a simulation. Methods: The time activity patterns of homemakers were analyzed based on the 'Time-Use Survey' data of the National Statistical Office in 2014. From September 30 to October 2, 2019, the experimenter lived in multifamily housing located in Guro-gu, Seoul. The I/O ratio of PM_2.5 concentration was measured by installing sensor-based instruments. Results: The average indoor and outdoor PM_2.5 concentrations during the three days were 33.1±48.9 and 45.9±25.3 ㎍/㎥, respectively. The average I/O ratio was 0.75±0.60. The indoor concentration tended to increase when PM_2.5 source activity such cooking and cleaning was present and outdoor PM_2.5 was supplied through ventilation. Conclusions: This study could be used as basic data for estimating indoor PM_2.5 concentrations with personal activity pattern and weather conditions using outdoor concentrations.

• 한국작물학회지
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• 제57권4호
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• pp.365-372
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• 2012

Native of soybean aphid (Aphis glycines Matsumura) is an Asia and aphid is one of the dangerous pests in soybean [Glycine max (L.) Merr.]. High density aphid populations can reduce crop production by causing severe damage. The objective of this study was evaluation of resistance to the soybean aphid in soybean cultivars and germplasms. A total of fifty five soybean cultivars or germplasms, including two susceptible and two resistant check varieties, were infested to evaluate their resistance in the field cage and greenhouse test by aphid colonies which derived from wild collected one soybean aphid biotype in Korea. The average number of reproduced soybean aphid was evaluated with 62.7 aphids in the resistant check variety PI 567598B and also estimated with 1,807 aphids for susceptible check variety Williams 82. In soybean varieties and germplasms, the average reproduced soybean aphid populations ranged from the lowest 497 aphids for Junjeori to the highest 3,862 aphids for Mansu. About seventy six percent of soybean cultivars and germplasms were shown high density soybean aphid populations when compared with another susceptible check variety PI 567543C in the field cage test. From the greenhouse test to evaluate aphid index, 87.3% of soybean cultivars or germplasms presented aphid index with 9.0. No soybean cultivars and germplasms were observed with soybean resistant phenotype when regarded a aphid resistant level as less than 10% aphid reproductions compared with susceptible check Williams 82. Although no Korean soybean cultivars were identified with resistant trait to the soybean aphid, we found one great resistant genetic resource PI 567598B in this study. This result will be helpful to further study for providing useful genetic information for soybean researchers.