본 연구는 2005년과 2007년에 시행한 중소기업기술통계조사에 모두 응한 중소 기업 중 전자부품, 영상, 음향, 통신 장비 업체(KSIC 32) 142개사를 대상으로 외부 자원 활용 과 흡수능력이 2년 후 경영성과와 혁신성과에 어떠한 영향을 미치는지, 또한 흡수능력이 이 들 관계를 어떻게 조절하는지를 실증 분석하였다. 분석 결과, 공동기술개발 여부와 정부지원액으로 측정한 외부 자원 활용은 성과에 유의미 한 영향을 미치지 않았고, 매출액에 대해서만 R&D투자비는 정(+)의, R&D인력비는 부(-)의 영향을 끼쳤다. 그리고 흡수능력의 조절효과는 측정방식과 독립변수에 따라 다르게 나타났 다. 즉, 공동기술개발을 수행할 때의 성과는 R&D투자비가 증가할수록 향상했지만, R&D인 력비는 반대로 작용했다. 그리고 정부의 자금지원이 늘어날수록 성과가 향상하는 기업은 R&D투자비가 낮거나 R&D인력비가 높은 기업이었다. 이러한 연구 결과는 중소기업의 외부 자원 활용이 내부 역량을 대체하지 못하며 오히려 흡수능력을 축적하여 외부 자원 활용의 효과를 극대화 할 필요가 있음을 보여준다. 또한, 공 동기술개발을 수행할 때에는 중소기업의 적극적인 R&D투자가 필요하며 정부의 자금지원은 R&D인력을 보유하고 있으나 자금을 확보하지 못해 독자적인 기술개발이 어려운 기업에 더 욱 효과적이다. 본 연구는 제한된 산업과 표본에서 이루어진 한계가 있지만, 종단적 자료를 통해 인과관계를 규명함으로써 기존 연구들의 한계를 극복하였다.

본 연구는 변화하는 환경에서 기업 간 R&D협력과 제품혁신과의 관계를 실증분석 한다. 더 나아가 R&D협력의 유형을 공급사슬상의 협력(수직적 협력)과 경쟁사와의 협력(수평적 협력)으로 구분하여, 기업의 흡수능력과 R&D협력의 상호관계가 제품혁신에 미치는 영향을 규명해보고자 한다. 본 연구의 분석 자료는 한국 제조업 대상으로 진행된 기술혁신조사(KIS) 자료를 이용했다. 연구결과, 수직적 협력과 수평적 협력이 제품혁신이 정(+)의 관계가 있다는 기본 가설을 지지되었으나, 수평적 협력이 수직적 협력보다 제품혁신에 더 많은 영향을 미친다는 가설은 지지되지 않았다. 또한, 기업의 흡수능력을 잠재적 흡수능력과 실제적 흡수능력으로 구분하여 R&D협력과의 상호작용이 제품혁신에 미치는 영향은 차이가 나타났다. 잠재적 흡수능력과 수직적 협력의 상호작용효과는 제품혁신에 정(+)의 관계를 가졌지만, 잠재적 흡수능력과 수평적 협력, 실제적 흡수능력과 수직적 협력, 실제적 흡수능력과 수평적 협력은 유의하지 않은 것을 확인할 수 있었다. 본 연구는 선행연구에서 제시한 흡수능력을 세부적으로 분류함에 따라 흡수능력을 논의하고자 시도하였다는 점에서 의의가 있다.

The present study is aimed at examining in multilateral ways the structural relationship among technological orientation, market orientation and product development performance of manufacturing companies, which are deemed to be key factors for them to increase absorptive capacities. From the study, it was revealed that: First, in terms of the relationship between market orientation and absorptive capacities, it was made clear by the analysis that the market orientation sought after by manufacturing companies has influence upon their absorptive capacities. Second, with regard to the relationship between technological orientation and absorptive capacities of manufacturing companies, the analysis found that the technological orientation pursued by them affects their absorptive capacities. Third, as for the relationship between absorptive capacities and product development performance, the analysis made it clear that the absorptive capacities of manufacturing companies exerts influence upon their product development performance. Fourth, in respect to the relationship between market orientation and product development performance, it was concluded from the analysis that market orientation produces effect upon product development performances like technological innovation and acquisition of new technologies needed for product development. Finally, regarding the relationship between technological orientation and product development performance of manufacturing companies, it became obvious from the analysis that the technological orientation affects the product development performance.

본 연구는 한국 벤처부문의 지식이전 효과를 실증적으로 분석했다. 구체적으로, 지식을 창출하는 단계에서부터 어떤 지식창조기관(주로 대학·출연연구소·기업R&D센터)에서 어떤 유형의 지식이 공급되는지 또한 그 성과는 어떠한지를 규명했다. 종속변수의 유형에 따라 3가지 분석방법인, `위계회귀분석`, `로지스틱 회귀분석` 및 `생존분석`을 사용했다. 분석 대상은 벤처인증기업 중 1,862개를 분석했으며, 데이터의 원천은 2008년도 STEPI 혁신조사를 비롯해서 정부부처에서 공표되는 객관적 데이터들을 사용했다. 주요 분석결과는 지식원천과 산업유형이 정렬될수록 그 지식이전은 특허를 높이고 성장성을 높였으며, 정부지원은 재무성과에 부정적 영향을 미쳤으나 지식이전에 대한 영향은 없었다. 또한 각 벤처기업의 흡수능력에 따라 지식이전 효과가 차별화되었다. 한국 벤처부문에서 발생하는 정부와 벤처캐피탈 시장의 역할에 대한 이론적 및 실무적 시사점을 토론했다.

The purpose of this study was to evaluate the tensile fracture energy absorption capacity of hybrid fiber reinforced cement composite by strain rate. Experiment result, it was confirmed that PVA suppressed the microcrack around the HSF at the strain rate 101/s, which resulted in the improvement of the pullout resistance of the HSF.

The rate of autogenous shrinkage (AS) development is a fundamental factor that highly influence the crack risk in low water cement mortar. Internal curing (IC) by using SAP has been used to reduce the AS in low water cement mortar and consequently mitigates the high risk of early-age cracking. Super absorbent polymers (SAP) supply additional IC water for hydration of mortar and as a result the effect of self-desiccation was minimized when the amount of internal water reduced. A series of autogenous shrinkage tests were performed considering two different SAP particle sizes in a constant curing temperature and humidity. The results indicated that IC method by using SAP fundamentally solved the problem of autogenous shrinkage in a low water cement ratio mortar.

however, these elements can limit plant growth. This study selected a heavy metal-tolerant plant by analyzing seed germination and biomass of alfalfa (Medicago sativa), canola (Brassica campestris subsp. napus var. nippo-oleifera), Chinese corn (Setaria italica), and a sorghum-sudangrass hybrid (Sorghum bicolor × S. sudanense), and determined heavy metal uptake capacity by analyzing biomass, chlorophyll a fluorescence, and heavy metal contents under high external copper or zinc levels. The seed germination rate and biomass of the sorghum-sudangrass hybrid were higher under copper or zinc stress compared to the other three plants. The plant biomass and photosynthetic pigment contents of the sorghum-sudangrass hybrid seedlings were less vulnerable under low levels of heavy metals (≤ 50 ppm copper or ≤ 400 ppm zinc). The maximum quantum yield of PSII (Fv/Fm) and the maximum primary yield of PSII (Fv/Fo) decreased with increasing copper or zinc levels. Under high copper levels, the decline in Fv/Fm was caused only by the decline in Fm, and was accompanied by an increase in non-photochemical quenching (NPQ). The Fv/Fm declined under high levels of zinc due to both a decrease in the maximum fluorescence (Fm) and an increase in the initial fluorescence (Fo), and this was accompanied by a marked decrease in photochemical quenching (qP), but not by an increase in NPQ. Accumulations of copper and zinc were found in both aboveand below-ground parts of plants, but were greater in the below-ground parts. The uptake capacity of the sorghum-sudangrass hybrid for copper and zinc reached 4459.1 mg/kg under 400 ppm copper and 9028.5 mg/kg under 1600 ppm zinc. Our results indicate that the sorghum-sudangrass hybrid contributes to the in situ phytoremediation of copper or zinc polluted soils due to its high biomass yield.

The energy absorption capacity of ultra high performance fiber reinforced concretes (UHPFRCs) was investigated at high strain rates (45 – 92 s-1) using a strain energy frame impact machine. The UHPFRCs investigated in this study showed much higher energy absorption capacity, fracture energy, ranging 42 and 71 kJ/m2 at high strain rates than that (31 and 43 kJ/m2) at static rate. The energy absorption capacity of UHPFRC at high strain rates was strongly dependent on fiber type and fiber volume content.

The rate of photosynthesis (A) of leaves from 10 plant species (6 evergreen and 4 deciduous) of the family Fagaceae was measured using a portable photosynthesis analyzer, to examine which species take up CO2 most efficiently. Of the evergreen species, the photosynthetic rate of Castanopsis cuspidata var. sieboldii was highest, and remained above 82.1～106.4 μmol kg-1s-1 from July to November. Of the deciduous species, the photosynthetic rate of Quercus acutissima was higher than that of the other three species, and remained high at 83.5～116.6 μmol kg-1s-1 from September to November. The photosynthetic rate of the 10 species was positively correlated with stomatal conductance (gs) and transpiration rate (E). However, there was no correlation between photosynthetic rate and intercellular CO2 concentration (Ci), although there was a positive correlation just in three species (Q. gilva, Q. acutissima and Q. glauca). These results suggest that the CO2 fixation capacity of C. cuspidata var. sieboldii, an evergreen species, and Q. acutissima, a deciduous species, is significantly higher than that of the other species examined, and that photosynthesis is regulated by both stomatal conductance and transpiration. Therefore, C. cuspidata var. sieboldii and Q. acutissima may be valuable for the evaluation of carbon uptake in urban green spaces as well as in afforested areas.