• 한국지반공학회논문집
• /
• 제37권5호
• /
• pp.33-46
• /
• 2021

2016년 발생한 국내 계기 계측 사상 최대 규모의 경주지진과 2017년 팔레트구조 건축물의 기둥이 파괴되는 등 국내 최대 지진피해가 발생한 포항지진 이후, 국내 모든 시설물에 대한 내진설계기준이 개정되고 있으며 특히, 포항지진 피해사례 조사 도중 미국, 일본, 뉴질랜드 등 주로 강진지역 국가에서 발생하는 액상화 피해가 발견되어 이에 대한 설계기준의 보완도 심도있게 진행되고 있다. 이 연구에서는 최근 개정된 항만 및 어항시설 내진설계기준에서의 액상화 평가방법을 고찰하고 액상화 평가절차에 새롭게 인용된 액상화 가능성 지수(LPI)를 중심으로 적용성 검토를 수행하였다. 이때, 액상화 발생가능한 모래지반을 다양하게 조성하고 이에 대한 케이스별 LPI 값을 산정 비교하였다. 또한, 실제 22개소 항만의 지반자료를 이용하여 지진시 지반응답해석에 기초한 액상화 평가의 수행과 함께 22개소의 LPI 값들을 비교 검토하였다.

• KIEAE Journal
• /
• 제14권4호
• /
• pp.5-10
• /
• 2014

Since construction work is an indispensable part of daily lives, complaints of noise are unavoidable. Noise control in construction sites is normally known as a regulation by a government and self-motivated noise controls rarely occur. In this paper, a marketing strategy is proposed to provide a potential value of noise control for real estate developer. First, people's perception to construction noise was examined in means of collecting and analyzing media reports between 2005 to 2011. Then decibel test was done in order to test noise generated by different devices in a construction site in various distances. According to the theory of core competency, a conceptual model was raised to illustrate profit and loss situation of the real estate developers in the case they invest more in noise control. The construction noise is discussed that it will ruin people's perception to the company's brand image and reputation. Also, the investment in the creation of silent site is discussed that it will not only bring benefit to the brand image work but also have value of profit in the market.

• 한국지진공학회논문집
• /
• 제20권3호
• /
• pp.171-180
• /
• 2016

Earthquake event keeps increasing every year, and the recent cases of earthquake hazards invoke the necessity of seismic study in Korea, as geotechnical earthquake hazards, such as strong ground motion, liquefaction and landslides, are a significant threat to structures in industrial hub areas including coastal facilities. In this study, systemized framework of integrated assessment of earthquake-induced geotechnical hazard was established using advanced geospatial database. And a visible simulation of the framework was specifically conducted at two coastal facility areas in Incheon. First, the geospatial-grid information in the 3D domain were constructed with geostatistical interpolation method composed of multiple geospatial coverage mapping and 3D integration of geo-layer construction considering spatial outliers and geotechnical uncertainty. Second, the behavior of site-specific seismic responses were assessed by incorporating the depth to bedrock, mean shear wave velocity of the upper 30 m, and characteristic site period based on the geospatial-grid. Third, the normalized correlations between rock-outcrop accelerations and the maximum accelerations of each grid were determined considering the site-specific seismic response characteristics. Fourth, the potential damage due to liquefaction was estimated by combining the geospatial-grid and accelerations correlation grid based on the simplified liquefaction potential index evaluation method.

• 한국환경보건학회지
• /
• 제34권6호
• /
• pp.414-422
• /
• 2008

Methane is a potent greenhouse gas and methane emissions from landfill sites have been linked to global warming. In this study, LandGEM (Landfill Gas Emission Model) was applied to predict landfill gas quantity over time, and then this result was compared with the data surveyed on the site, Cheongju Megalo Landfill. LandGEM allows the input of site-specific values for methane generation rate (k) and potential methane generation capacity $L_o$, but in this study, k value of 0.04/yr and $L_o$ value of $100\;m^3$/ton were considered to be most appropriate for reflecting non-arid temperate region conventional landfilling like Cheongju Megalo Landfill. Relatively high discrepancies between the surveyed data and the predicted data about landfill gas seems to be derived from insufficient compaction of daily soil-cover, inefficient recovery of landfill gas and banning of direct landfilling of food waste in 2005. This study can be used for dissemination of information and increasing awareness about the benefits of recovering and utilizing LFG (landfill gas) and mitigating greenhouse gas emissions.

• 한국건축시공학회지
• /
• 제2권1호
• /
• pp.147-154
• /
• 2002

In the Past, The selection of individual method of construction was done by head of construction site or an experienced person very frequently. By doing this, The wrong selection of construction method without exact adjudication of construction site situation lead to increasing of cost and extension of construction term. Finally it will effect all over the construction process. Especially, In case of underground construction in the beginning, there are a lot of a variable factor and it also effect on the entire construction process and it need very careful process. The purpose of this study is to present the best suitable methodology for selection of construction method by considering potential risk of construction method and variables together with external condition for underground construction. The purpose of this study Is to select the most suitable construction method by analysing potential conditions(construction site situation and client request in designing ) To do this, We prepared arrangement rule to arrange the conditions for construction method. And thin make checklist of the analyzing construction method. Though above process, To expect the risk of individual construction method using above risk checklist and using Analytic Hierarchy process among Multiple-Criteria Decision making, the professional opinions is to be adapted. By doing this, it can lead and select the most suitable construction method considering the data which get from risk density test.

• 한국건축시공학회:학술대회논문집
• /
• 한국건축시공학회 2001년도 학술논문발표회
• /
• pp.99-117
• /
• 2001

In the past, The selection of individual method of construction was done by head of construction site or an experienced person very frequently. By doing this, The wrong selection of construction method without exact adjudication of construction site situation lead to increasing of cost and extension of construction term. Finally it will effect all over the construction process. Especially, In case of Underground construction in the beginning, there are a lot of a variable factor and it also effect on the entire construction process and it need rely careful process. The purpose of this study is to present the best suitable methodology fer selection of construction method by considering potential risk of construction method and variables together with external condition for Underground construction. The purpose of this study is to select the most suitable construction method by analysing potential conditions(Construction site situation and Client. Request in designing) To do this, We prepared arrangement rule to arrangement conditions for construction method. And then make Checklist the analyzing construction method. Though above process, To expect the risk of individual construction method using above risk checklist and using Analytic Hierarchy Process among Multiple-Criteria Decision Making, the professional opinions is to be adapted. By doing this, It can lead and select the most suitable considering method considering the data which get from risk density test.

• Environmental Engineering Research
• /
• 제19권2호
• /
• pp.175-184
• /
• 2014

Weirs are conventional structures that control water level and velocity in streams to facilitate water resource management. Despite many weirs built in streams, there is little information how weirs change hydrology regime and how that translates to sediment and phosphorus (P) responses. This study evaluated the influence of weirs on P retention and mobilization in an urban tributary of the Han River in Korea. Total P concentrations in sediments upstream of weirs were higher than the downstream site, mainly due to the increase of potentially available fractions (labile P and aluminum- and iron-bound P) (p < 0.05). Equilibrium phosphorus concentrations ($EPC_o$) were lower than soluble reactive phosphorus (SRP) concentrations of stream waters, but there was an increasing trend of sediment $EPC_o$ upstream of weirs compared to the downstream site (p < 0.001) indicating a greater potential for P release upstream of weirs. Sediment core incubation showed that SRP release rates upstream of weirs were higher than the downstream site under anoxic conditions of the water column (p < 0.01), but not under oxic conditions. SRP release rates under anoxic conditions were greater than that measured under oxic conditions. Un-neutral pH and increased temperature could also enhance SRP release rates upstream of weirs. We conclude that weirs can increase P retention within stream sediments and potentially promote significant P releases into waters, which in turn cause eutrophication.

• 대한족부족관절학회지
• /
• 제27권3호
• /
• pp.103-107
• /
• 2023

Quinolone antibiotics are frequently prescribed for suspected respiratory or urinary tract infections because of their effectiveness and generally perceived safety profile. On the other hand, some studies have raised concerns regarding the potential association between quinolone use and Achilles tendinopathy or tendon rupture. There is a lack of reports on the link between quinolone use and multiple tendon and tendon attachment site pain in the foot and ankle joints; hence, this study examined this issue further. This paper presents a case report of a patient with persistent Achilles tendinopathy and multiple tendon and tendon attachment site pain in the foot who did not respond adequately to conservative treatments. In particular, the discontinuation of quinolone use resulted in favorable clinical outcomes. This report offers valuable insights into the potential risks associated with quinolone antibiotics and highlights the importance of vigilance when managing patients with tendon-related complaints. A comprehensive review of the relevant literature is also presented to contextualize these findings.

• 한국건설관리학회논문집
• /
• 제15권6호
• /
• pp.71-82
• /
• 2014

우리나라 건설 현장에서는 인적요소인 건설근로자들의 경험과 행동에 따라 노동 생산성이 좌우된다. 건설현장의 노동 생산성을 향상시키기 위해서는 노동생산성을 저해시키는 잠재적인 요인들에 대한 전략적인 관리가 필요하다. 하지만 기존의 노동생산성 관리는 사전에 잠재적인 저해요인들을 도출하여 전략적으로 관리계획을 세우기보다는 현장에서 발생하는 현재적인 저해요인들만을 관리하는데 치중되어 있다. 이에 본 연구에서는 잠재적인 원인을 파악하는데 용이한 IPA를 이용하여 현장별 건설근로자의 노동생산성 저해요인을 비교분석하고자 하였으며, 근로자의 경제적인 문제에 대한 불만뿐만 아니라 근로자의 고용불안과 취약한 근로조건에 대해서 보호받고 있다고 느끼지 못하는 현실적 문제점을 파악 할 수 있었다. 이를 통해 현장관리자에게 실질적이고 현장에 적합한 관리측면의 전략적 시사점을 제시하며, 현장의 특성에 따라 노동생산성 향상의 중 장기적인 대책을 마련할 수 있을 것으로 기대된다.

• Advances in Energy Research
• /
• 제2권2호
• /
• pp.85-95
• /
• 2014

Small Hydro-Power (SHP) is an environmental friendly technology. Usually hydro power generation projects are viewed as constructing large dams and reservoirs but available new research and engineering techniques have helped hydro power generation without large dams and without large reservoirs. In India, there are several water installations, irrigation dams, canals, streams or running rivers not tapped to generate power. In these cases the existing system and facilities can help in generating power with less investment and time. This area is yet unexplored. Harnessing a stream for hydroelectric power is a major undertaking for the energy crises and the global issues to go green. In this technical note a potential site for mini hydro power plant nearby Shoolini University is identified and examined for the economic feasibility.