이효범 한국철도기술연구원 선임연구원

이효범 한국지반공학회 2023 지반 : 한국지반공학회지 Vol.39 No.5

앎의 기초론(Foundationalism)에 관한 논쟁

이효범 한국동서철학회 1986 동서철학연구 Vol.3 No.1

심신동일론(Identity theory)의 동일성의 문제

이효범 한국동서철학회 1984 동서철학연구 Vol.1 No.1

점성토 연약지반에서의 다중 동시주입 컴팩션 그라우팅 공법 적용성 연구

이효범,정현석,정의엽,최항석 대한토목학회 2019 대한토목학회논문집 Vol.39 No.6

컴팩션 그라우팅 공법, 일명 CGS (Compaction Grouting System) 공법은 저유동성 그라우트재의 주입을 통해 주변 지반을 압밀・다짐하여 원지반의 물성 향상은 물론 지중 그라우트 구근체의 형성을 통해 복합지반 거동을 기대함으로써 지반을 개량하는 공법이다. 그러나 기존 컴팩션 그라우팅 공법에 사용되는 펌프는 한 번에 여러 공을 동시에 주입하기 어려워 시공 물량이 많아 신속함이 요구되는 공사 시에 시공 효율성 확보가 어려웠다. 따라서 본 논문에서는 3공까지 동시주입이 가능한 다중 동시주입 컴팩션 그라우팅 공법을 개발하여 현장시험을 통해 지반 보강효과의 적용성을 평가하였다. 현장시험은 점성토 연약지반에 단일공과 3공 삼각 배열로 각각 시험시공하고 그라우팅 주입 전・후 표준관입시험 (SPT)을 수행하여 그 결과를 비교・분석하였다. 최종적으로 점성토 연약지반에서 다중 동시주입 컴팩션 그라우팅 공법의 적용 시, 요구되는 적정 동시주입 이격거리와 충분한 지반 안정화 시간 확보의 중요성에 대해 제언하였다. The compaction grouting method is one of the conventional ground improvement methods, which consolidates and compacts thesurrounding ground through the injection of grout materials with low mobility. Injecting the grout into the ground can improve the soilproperties, as well as form a composite of soil-grout columns. However, the conventional grout pumping is not applicable to handlemultiple injection holes at the same time, which may diminish its constructability when the construction time is not enough. This paper proposes a simultaneous multiple compaction-grouting method using a new pump system developed to cover up simultaneously three injection holes at a time. Field injection tests with a single injection hole and with triangular arrangement of injection holes wereconducted to evaluate the applicability of the proposed method to soft clay ground. In addition, a series of standard penetration tests (SPTs) were performed to assess the efficiency of each arrangement in improving the soft ground. It is noted from the in-situ test results that the interval distances between injection holes and the elapse time for ground stabilization are the crucial factors governing the applicability of the simultaneous multiple compaction-grouting method to improve the soft clay ground.

위기갈등문화에 대한 소통방식 연구: SNS 메시지 구체성을 중심으로

이효범,김정규 국제문화기술진흥원 2020 The Journal of the Convergence on Culture Technolo Vol.6 No.2

Based on the development of SNS in Mobile and Internet, crisis management is regarded as an important issue that determines the rise and fall of businesses. This study aims to contribute to more efficient implementation of crisis management messages by examining the relationship between the strategy of crisis management communication and the level of specificity of the message. The study found that consumers evaluated the crisis-hit company's acceptance communication strategy to show a higher level of integrity, reliability and appropriateness than the defensive strategy. However, this main effect is mediated by the specificity (high specificity vs. low). Specifically, consumers' assessment of crisis management messages and information-seeking behavior were found to be most favorable when used in a mixture of acceptance strategies and high specificity. Conversely, the lowest effect was the combination of defense strategy and high specificity. Based on these results, the theoretical discussions is described for crisis management practitioners of enterprises and organizations. 모바일과 인터넷의 발전을 바탕으로 등장한 Social Network Service의 확산으로 기업의 위기관리는 흥망성쇠를 좌우하는 중요한 이슈로 간주되고 있다. 본 연구는 위기관리 커뮤니케이션의 전략과 메시지의 구체성 수준 간의 관계를 고찰하여 보다 효율적인 위기관리 메시지 집행에 공헌하고자 목적되었다. 연구결과 소비자들은 위기를 맞은 기업의 수용하기 커뮤니케이션 전략을 방어적 전략보다 높은 수준의 진실성, 신뢰성, 적절성을 보인다고 평가하였다. 하지만 이러한 주효과는 메시지의 구체성(높은 구체성 vs. 낮은 구체성)에 따라 매개되었다. 상술하면 위기관리 메시지에 대한 소비자들의 평가 및 정보추구 행동의도는 수용하기 방식과 높은 구체성이 혼합되어 사용될 때 가장 호의적인 것으로 나타났다. 반대로 가장 낮은 효과는 방어하기 전략과 높은 구체성의 조합으로 나타났다. 이러한 결과를 바탕으로 기업 및 조직의 위기관리 실무자에 대한 조언과 해석에 사용된 이론적 논의를 본문 중에 기술하였다.

인간적 삶을 위한 Sartre 와 Skinner 의 길

이효범 한국국민윤리학회 1984 倫理硏究 Vol.20 No.1

Growth characteristics and fl owering initiation of Phalaenopsis Queen Beer ‘Mantefon’ as aff ected by the daily light integral

이효범,Ju-Hee Lee,안성광,Ji Hyun Park,Ki Sun Kim 한국원예학회 2019 Horticulture, Environment, and Biotechnology Vol.60 No.5

This study was conducted to determine the eff ects of daily light integral (DLI) levels with diff erent photoperiods and lightintensities on the growth and fl owering initiation of Phalaenopsis plants. Five-month-old Phalaenopsis Queen Beer ‘Mantefon’plants were treated with combinations of three photoperiods [8/16 (day/night, short day, SD), 12/12 (medium day,MD), and 16/8 h (long day, LD)] and three light intensities in the range of photosynthetically active radiation of 50, 100, and200 μmol·m −2 ·s −1 , resulting in DLI levels ranging from 1.44 to 11.52 mol·m −2 ·d −1 with warm-white LEDs at 28°C duringthe vegetative period. Additionally, 12-month-old plants were treated with combinations of three photoperiods [8/16 (day/night, SD), 8 + 8/8 (day-extension (DE); an extension with 10 μmol·m −2 ·s −1 for 8 h right after the SD), and 16/8 h (LD)] andthree light intensities (75, 150, and 300 μmol·m −2 ·s −1 ), resulting in DLI levels ranging from 2.16 to 17.28 mol·m −2 ·d −1 , at20°C during the forcing period for fl owering. During the vegetative period, plants showed a tendency of overgrowth in leaves,via the formation of long and narrow leaves, as the light intensity decreased, irrespective of the photoperiod. The number ofnew leaves, total leaf area, and shoot and root dry weights increased with increasing photoperiod and light intensity, implyingan increase in the amount of light energy. During the forcing period, photoperiodic eff ects on fl owering initiation werenot observed, while increasing the light intensity increased the number of infl orescences and accelerated spiking. The DLIshowed higher correlation coeffi cients with growth and fl owering initiation characteristics than those of the photoperiodor light intensity alone. New leaf emergence, biomass accumulation, and spiking were enhanced as DLI levels increased,although these positive eff ects were gradually saturated. These fi ndings indicated that the DLI is a major factor in the growthand fl owering initiation of Phalaenopsis plants and increasing DLI levels can promote growth or fl owering initiation of theseplants. These fi ndings will be useful in controlling light conditions to maximize the growth rate and shorten the cultivationtime in Phalaenopsis cultivation.

골다공증성 족관절 골절

이효범,김철현,김갑래 대한족부족관절학회 2023 대한족부족관절학회지 Vol.27 No.3

The incidence of osteoporotic ankle fractures is increasing as the population ages. These fractures are becoming more common in clini- cal practice and require careful management because of the higher likelihood of developing complications than typical ankle fractures. The introduction of a method for measuring the ankle joint bone mineral density is a valuable tool for assessing the bone quality of the ankle joint. By evaluating the bone mineral density, healthcare professionals can better understand the extent of osteoporosis and the overall strength of the ankle joint. This information is crucial for determining the appropriate treatment for individual fractures. Several factors must be considered when deciding on the treatment for osteoporotic ankle fractures. These include the ankle joint bone mineral density, skin condition, any comorbidities the patient may have, and the patient's functional demands. Taking these factors into consid- eration allows healthcare providers to tailor the treatment plan to the specific needs and the circumstances of each patient. By applying the appropriate treatment, it is expected that the complications associated with osteoporotic ankle fractures can be minimized, and the prognosis for patients can be improved.

Growth and CO2 exchange in young Phalaenopsis orchids grown under different levels of humidity during the vegetative period

이효범,임소현,임남현,안성광,김기선 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.1

Phalaenopsis plants are distributed throughout tropical regions with high humidity, which is generally necessary for theircultivation. This study was conducted to determine the effects of different relative humidity (RH) conditions on the growthand photosynthetic characteristics of young Phalaenopsis plants. Three-month-old clones of Phalaenopsis ‘Blanc Rouge’and Doritaenopsis ‘Mantefon’ plants were grown under 30 ± 10, 50 ± 10, 70 ± 10, or 90 ± 10% RH conditions. The RHtreatments were maintained for approximately 6 months in environment-controlled growth chambers. The temperature andphotoperiod were maintained at 28 °C and 12/12 h, respectively. At the start of the RH treatments, the mean leaf span was14.2 and 16.7 cm in ‘Blanc Rouge’ and ‘Mantefon’ plants, respectively. In both cultivars, plants grown under 70% RH showedthe longest leaf span, which was 25.3 and 20.6 cm in ‘Blanc Rouge’ and ‘Mantefon’, respectively. High-humidity conditions(i.e. 70 and 90% RH) generally promoted the length of leaf span, but the growth rate of leaf span was slightly lower at 90%RH than at 70% RH. CO2exchange, stomatal conductance, and transpiration rate of the uppermost mature leaf were observedin ‘Blanc Rouge’ plants grown at 30, 50, and 70% RH. The highest rate of CO2uptake was observed in the plants grownat 70% RH, followed by 50 and 30% RH. The stomatal conductance increased and transpiration decreased with increasingRH. The maximum quantum yield of photosystem II (Fv/Fm) of plants grown under 70 and 90% RH slightly decreased after9 weeks of treatments, but there were no differences among the treatment groups at the conclusion of the study. These resultsindicated that high RH (e.g. 70%) slightly increases CO2uptake and leaf span of young Phalaenopsis plants.

중족부에 발생한 다발성 악성 말초 신경초 종양 1예: 증례 보고

이효범,김갑래,김동현,Lee, Hyobeom,Kim, Gab-Lae,Kim, Donghyeon 대한족부족관절학회 2020 대한족부족관절학회지 Vol.24 No.4

Malignant peripheral nerve sheath tumors (MPNSTs) usually arise in soft tissues; they are rarely found in the bone. This paper reports a case of MPNST in the foot and ankle joint involving the distal tibia, talus, calcaneus, navicular, medial intermediate, and lateral cuneiform, cuboid, and 2nd to 4th metatarsal bone. Palliative treatment was performed. The authors encountered a patient with intraosseous MPNST of the midfoot who presented with nonspecific clinical and radiologic findings. This case shows that a high index of suspicion and a histopathology examination, including immunohistochemistry, will be necessary for an accurate diagnosis.