• 경영정보학연구
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• 제17권1호
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• pp.171-197
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• 2015

SNS 기업들의 최대 관심사는 사용자들의 요구분석을 통한 만족도 제고 및 지속적 사용을 유도할 수 있는 서비스 개발에 있다. 특히, 성숙기에 접어든 SNS는 서비스를 전개하는데 있어 관리의 방향성이 중요하게 고려되고 있다. 이를 위해 SNS에서 제공하는 서비스 중 사용자 기대에 비추어 만족하지 못하는 부분들을 파악하고, 궁극적으로 소비자들이 추구하는 기능을 파악하는 것이 중요하다. 따라서 본 연구에서는 다양한 이론 및 선행 연구들을 분석하여 사용자의 SNS 이용 만족 및 지속적 사용의도에 영향을 미치는 다양한 요인들을 도출하였다. 이를 위해 기대일치이론(Expected Confirmation Model : ECM)을 기반으로, 기존 품질요인에 SNS 특성을 반영한 사회성 품질, 개인 감성 품질을 추가적으로 고려하여 품질 관점에서 통합적으로 접근하였다. 그리고 인지요인들과의 영향정도를 분석하여 이용 만족 및 지속적 이용의도에 영향을 미치는 요인을 제시하였다. 이를 통해 SNS 기업들의 서비스 전개 방향성 및 이용 만족 모형을 개발하는데 유용한 가이드라인을 제시하였다.

• Journal of Plant Biotechnology
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• 제2권3호
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• pp.157-163
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• 2000

Optimization of chemicals in the large scale sea water medium and inoculum for biomass and natural colourants production in the marine cyanobacteria, Phomidium tenue BDU 46241 (phycoerythrin producer) and P.valderianum BDU 30501 (phycocyanin producer) was carried out by experiments in L8 orthogonal array. Mathematical analysis revealed the significance of these factors. The factor(s) that critically control the yield varied with the organism and the end-product further, the desirable level of these factors between the normal and a higher level tested was identified and improved media were evolved. In both cyanobacteria, higher level of $K_2$$HPO_4$, $NaNO_3$ and inoculum with normal level of ferric ammonium citrate was found to be desirable for biomass production and additionally, higher level of $MgSO_4$ for pigment production. The level of other factors varied with the organism and the end-product. Confirmation experiments showed that the clues obtained based on mathematical experimentation are valid. In P.tenue, the medium optimized for biomass production increased the yield of biomass by 495% and the medium optimized for phycoerythrin production increased the yield of biomass by 408% with 30% increase in phycoerythrin content of the biomass. Similarly in P.valderianum, the medium optimized for biomass production increased the yield of biomass by 224% and the medium optimized for phycocyanin production increased the yield of biomass by 143% with 44% increase in phycocyanin content of the biomass.

• Asian-Australasian Journal of Animal Sciences
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• 제21권10호
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• pp.1506-1515
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• 2008

Two feeding trials were conducted to assess the relative bioavailability (RBV) of methionine hydroxy analogue calcium salt (MHA-Ca) in comparison to DL-methionine (DL-Met). Male Ross 308 (1-38 days) and Cobb 500 chickens (1-42 days) were used in studies 1 and 2, respectively. Experimental diets based on wheat and soybean meal or sorghum and soybean meal were fed during three phases. In both experiments graded levels of DL-Met and MHA-Ca were supplemented to Met+Cys deficient basal diets. Additionally, in experiment 1, increasing levels of a DL-Met preparation diluted with corn starch to 65% purity (DL-Met65) were supplemented. Birds were kept in floor pens and feed and water were available ad libitum. Body weights and feed consumption were recorded at the beginning and end of the experimental periods and weight gain and feed efficacy were computed subsequently. At the end of the experiments, a number of birds were slaughtered for carcass evaluation (dressing percentage, breast meat yield). Dose response data were analysed by both ANOVA and nonlinear common plateau asymptotic regression. In both experiments birds responded significantly to increasing levels of either methionine source. However, RBV of MHA-Ca compared to DL-Met was markedly (in many cases significantly) below 84%, the value which would have been expected from MHA-Ca's chemical characteristics. Excluding some extremely low RBV figures of trial 2, RBV of MHA-Ca averaged to about 63% in relation to DL-Met. In addition, supplementation of DL-Met65 allowed confirmation of nonlinear common plateau asymptotic regression to be suitable to determine RBV.

• The Korean Journal of Pain
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• 제10권2호
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• pp.281-284
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• 1997

Continuous epidural blockade is a widely accepted, useful technique for providing anesthesia and analgesia. But there have been several anecdotal reports of complications such as: abnormal position, knotting, shearing of the catheter, etc. We experienced a case of shearing of the end of an epidural catheter which was difficult to remove from epidural space of a 39-year-old patient. Ultrasonogram proved to be very effective to confirm the presence and position of the retained catheter. We surgically removed the retained catheter as it could potentially lead to infection of the epidural space. We advocate the ultrasonogram as an effective procedure to confirm and locate retained epidural catheter.

• Structural Engineering and Mechanics
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• 제77권1호
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• pp.57-74
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• 2021

The thermal eigenvalue responses of the graded sandwich shell structure are evaluated numerically under the variable thermal loadings considering the temperature-dependent properties. The polynomial type rule-based sandwich panel model is derived using higher-order type kinematics considering the shear deformation in the framework of the equivalent single-layer theory. The frequency values are computed through an own home-made computer code (MATLAB environment) prepared using the finite element type higher-order formulation. The sandwich face-sheets and the metal core are discretized via isoparametric quadrilateral Lagrangian element. The model convergence is checked by solving the similar type published numerical examples in the open domain and extended for the comparison of natural frequencies to have the final confirmation of the model accuracy. Also, the influence of each variable structural parameter, i.e. the curvature ratios, core-face thickness ratios, end-support conditions, the power-law indices and sandwich types (symmetrical and unsymmetrical) on the thermal frequencies of FG sandwich curved shell panel model. The solutions are helping to bring out the necessary influence of one or more parameters on the frequencies. The effects of individual and the combined parameters as well as the temperature profiles (uniform, linear and nonlinear) are examined through several numerical examples, which affect the structural strength/stiffness values. The present study may help in designing the future graded structures which are under the influence of the variable temperature loading.

• 무역상무연구
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• 제72권
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• pp.81-113
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• 2016

The adoption of the YAR 2016 brings to an end the 12 years of uncertainty for shipowners and Marine insurers which followed the adoption of the YAR 2004, which did not have the support of shipowners, and which were very rarely used in preference to the well-established and well understood YAR 1994. The development and finalisation of the YAR 2016 is the product of an extensive review undertaken by the IWG with input from the International Group, international average adjusting community, National Maritime Law Associations, the International Chamber of Shipping, BIMCO and IUMI amongst others. The Group clubs welcome and support the adoption of the YAR 2016 and recommend its incorporation in members' future shipping contracts. The Club will be taking steps to adopt logical changes to the 2017 Rules. In the meantime, this circular serves as confirmation Club cover extends to all shipping contracts incorporating YAR 2016. This study analyse the adjustment practice of general average according to the application of YAR 2016.

• Safety and Health at Work
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• 제9권4호
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• pp.468-472
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• 2018

Background: Firefighters are required to use self-contained breathing apparatus (SCBA), which impairs ventilatory mechanics. We hypothesized that firefighters have elevated arterial $CO_2$ when using SCBA. Methods: Firefighters and controls performed a maximal exercise test on a cycle ergometer and two graded exercise tests (GXTs) at 25%, 50%, and 70% of their maximal aerobic power, once with a SCBA facemask and once with protective clothing and full SCBA. Results: Respiratory rate increased more in controls than firefighters. Heart rate increased as a function of oxygen consumption ($V_{O_2}$) more in controls than firefighters. End-tidal $CO_2$ ($ETCO_2$) during the GXTs was not affected by work rate in either group for either condition but was higher in firefighters at all work rates in both GXTs. SCBA increased $ETCO_2$ in controls but not firefighters. Conclusions: The present study showed that when compared to controls, firefighters' hypoventilate during a maximal test and GXT. The hypoventilation resulted in increased $ETCO_2$, and presumably increased arterial $CO_2$, during exertion. It is proposed that firefighters have altered $CO_2$ sensitivity due to voluntary hypoventilation during training and work. Confirmation of low $CO_2$ sensitivity and the consequence of this on performance and long-term health remain to be determined.

• 대한임상검사과학회지
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• 제48권2호
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• pp.124-129
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• 2016

세균내독소는 lipopolysaccharide (LPS)라고 불리우며, 그람음성 세균의 세포벽에 존재하는 물질로 어느 생체재료나 액체에 존재할 수 있다. 세균내독소가 혈액으로 침투되면 발열 및 염증을 유발시킨다. 본 연구에서는 장내 그람음성세균인 Escherichia coli O157:H7, Klebsiella oxytoca, Salmonella Typhi, Shigella sonnei, Morganella morganii의 LPS 양을 비교하려 하였다. 각 세균은 배양한 후 $1.5{\times}10^8CFU/mL$ 농도로 희석하여 동일한 농도로 하였으며 실험의 정당성을 위하여 LAL시약의 표시감도확인시험을 진행하였다. 10 fold dilution 후 1차 시험을 하여 각 균의 반응 end point를 확인하고 바로 윗단계 희석배수 사이에서 2 fold dilution하여 균의 최종 반응 end point를 확인하였다. 결과적으로 E. coli O157은 75~37.5 CFU/mL, K. oxytoca는 37.5~18.75 CFU/mL, M. morganii와 S. Typhi는 3.75~1.875 CFU/mL, S. sonnei는 7.5~3.75 CFU/mL에서 0.015 EU/mL 이상의 endotoxin이 검출되었다. 최종적으로 억제인자에 대한 확인시험을 진행하여 결과값을 보증하였다. 본 연구를 통하여 세균내독소에 대한 추가적인 연구가 지속되기를 기원한다.

• 벤처창업연구
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• 제18권5호
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• pp.241-253
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• 2023

현재 급변하는 환경 속에서 각 국가는 일자리 창출 및 기술 경쟁력 강화를 위한 노력을 지속하고 있다. 특히 벤처기업 및 창업기업에 대한 지원과 활성화 정책은 국가 경쟁력을 높이는 역할을 하는 것으로 알려져 있다. 경쟁 심화로 비즈니스 수명이 짧아지고 고객들의 요구가 다양화되는 환경의 불확실성이 확대되는 가운데 기업은 적절한 대처를 해야 한다. 우선 기업은 스스로 내부 역량을 강화하는 노력을 하는 것이 중요하다. 그러나 벤처기업은 내부 자원 및 역량 등이 부족하여 외부 환경으로부터의 지원이 기업의 생존으로 연결될 만큼 중요하다고 볼 수 있다(Timmons, 1994). 기업의 경쟁력 강화를 위해 국가 차원에서 재정지원 및 인증제도를 운용하고 있다. 그러나 재정지원은 상황에 따라 기업의 자생력을 낮출 수 있으므로 연구개발 지원 및 창업교육과 같은 비 재정적 지원이 벤처기업 성장에 장기적으로 도움이 된다고 보았다(Aghion et al., 2012; 전미미·고강혁, 2021). 비 재정적 지원은 사업화, 시설, 공간, 보육, 인력, 인증제도 등으로 구분되는데 본 연구에서는 인증제도인 벤처기업 확인제도의 혜택을 중심으로 확인하였다. 이를 위해 2021년도 벤처기업정밀실태조사 데이터 및 벤처기업의 매출액 데이터를 활용하였으며, SPSS 26.0 패키지와 SPSS PROCESS MACRO를 활용하여 분석하였다. 분석 결과, 벤처기업의 경영환경 수준은 벤처확인제도 혜택이나 벤처기업 역량 수준을 높이는 데는 긍정적인 영향을 주지만, 실질적인 경영성과로 이어지기는 어려운 것으로 확인되었다. 또한 벤처기업의 경영환경 수준과 경영성과 간 관계를 벤처기업 역량 수준이 매개하는 것으로 확인되었다. 결과적으로 단순히 벤처기업의 경영환경 수준이 긍정적이거나 벤처기업에 친화적일지라도 외부 환경으로부터의 지원을 잘 소화할 수 있는 내부 역량이 있는 기업이 경영성과를 높인다고 할 수 있다.

• 대한건축학회논문집:계획계
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• 제34권10호
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• pp.25-32
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• 2018

The ending of the warranty under the current Multi-Housing Management Act has a lot of problem as it is very disadvantageous to the business entity and it makes hard for the contractor to finish the repair work. It is almost none for the business entity to get the written confirmation of the expiration of warranty liability from the client even though it sincerely completed their warranty obligation. It is because the client asks for the works other than fair repair arising from the defect in the work, such as the upgrade work for the enhancement of the value of their assets and the repair work which the client should take care before it issues the written confirmation of the expiration of warranty liability to the contractor. "So, though there is the law specifying this matter, the parties are relying on the unnecessary civil agreement. This leads to the big social and economic losses. If there is no agreement made between the client and the contractor, that leads to the legal dispute. This research on cases of 10 apartments shows that the types of works which the apartment residents ask for depend on the characteristics and conditions of the apartments and that they ask for various kinds of compensational works. In addition, it was found that there were many cases in which even the civil agreement is not recognized as the ending of the warranty obligation even if the proper procedure is taken for the ending of warranty by the contractor or business entity. If the collateral is to be offered to the client, the contractor would get more hard because there is the additional cost other than the warranty obligation, thus damaging the legal objective of the laws trying to minimize the damage made to the resident of the apartments. It means that the increase in the unnecessary warranty cost would lead to the increase in the selling price of apartment and the ending of the dispute through the civil procedure would make the Multi-Housing Act ineffective.