• 한국물환경학회지
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• 제27권3호
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• pp.300-305
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• 2011

This study aimed at analyzing the runoff quality by the layer thickness and material of soil roof to make best use of the rainwater falling on it in terms of safety and efficiency and resulted in the following assessments. It turned out that the concentrations decreased more in T-N, $NO_3$-N, $NH_4$-N, T-P and $PO_4$-P in roof rainwater except 30 cm for the RW1 soil roof after passing through it than those of first rainwater. On the other hand, the concentrations in rainwater passing through gravel roof turned out to be equal or same to those of the first rainwater. As a result of analysis of metallic stuff in runoff, there was no indication of Cd, Cr, Mn and Pb as well. The concentration of Cu, Fe and Zn in rainwater through soil roof became less than that of the first rainwater. In this research, the soil roof showed the good efficiency in lowering the concentration of such components as nitrogen, phosphorus and metals. Based on the results from this work, more practical study would be required further in the future in relation to soil roof when installing the rainwater-utilizing facilities.

• 영어영문학
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• 제64권3호
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• pp.383-401
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• 2018

Wordsworth is a poet who thought seriously about problems of human's relation to the world as perceiving subjects. What he calls "the life of things" illustrates the enabling power of things and their vitalities at play in excess of human elements. Drawing on this, he provides insights into vital materialities that act upon, and are acted upon by, the collaborative circulation between human and nonhuman agency. This paper aims to reinvigorate the debate about Wordsworth's ethics of things in terms of such critical notions as things, objects, agency, and nonhumans in an attempt to explain what he envisions as new environmental realities built upon nonhierarchical, collaborative relationships between all participants. From the vantage point of things, we see clearly what has been neglected in the New Historicist critical method. It holds fast to the conceit that humans are entitled to have sole agential legitimacy, disregarding the vibrancy of things. They opt for the objectified matter or the (re)presented state of things. But in terms of Wordsworth's life of things, all participants have equal amounts of agency regardless of their forms and for that reason humans are expected to respect other things' sovereignty. Through encounters with things, things in their thingness show up for us, only to reveal the ineradicable rupture between themselves and their objectified forms.

• Earthquakes and Structures
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• 제24권2호
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• pp.97-109
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• 2023

This experimental study investigates the effectiveness of applying carbon fiber reinforced polymer (CFRP) jackets for the retrofit of short reinforced concrete (RC) columns with inadequate transverse reinforcement and stirrup spacing to longitudinal rebar diameter equal to 12. RC columns scaled at 1/3, with round and square section, were subjected to axial compression up to failure. A damage scale is introduced for the assessment of the damage severity, which focusses on the extent of buckling of the longitudinal rebars. The damaged specimens were subsequently repaired with unidirectional CFRP jackets without any treatment of the buckled reinforcing bars and were finally re-tested to failure. Test results indicate that CFRP jackets may be effectively applied to rehabilitate RC columns (a) with inadequate transverse reinforcement constructed according to older practices so as to meet modern code requirements, and (b) with moderately buckled bars without the need of previously repairing the reinforcement bars, an application technique which may considerably facilitate the retrofit of earthquake damaged RC columns. Factors for the estimation of the reduced mechanical properties of the repaired specimens compared to the respective values for intact CFRP-jacketed specimens, in relation to the level of damage prior to retrofit, are proposed both for the compressive strength and the average modulus of elasticity. It was determined that the compressive strength of the retrofitted CFRP-jacketed columns is reduced by 90% to 65%, while the average modulus of elasticity is lower by 60% to 25% in respect to similar undamaged columns jacketed with the same layers of CFRP.

• 대순사상논총
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• 제19권
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• pp.1-20
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• 2005

In spite of the ethics of sangsaeng is based on Daesoon thoughts, we can regard it as a moral theory independent on religion. Like other reasonable moral theories, It has three levels, moral standard, moral rules and moral acts or judgements. Sangsaeng is moral standard in the ethics of sangsaeng. moral rules are derived from it and could justify many particular moral judgements and acts. The ethics of sangsaeng belongs to metaphysical ethics and holistic ethics because it is derived holistic, sangsaeng's world view of Daesoon thoughts. The ethics of sangsaeng, first of all, extends the realm of moral community to all beings of world. Therefore it might works well on as a solution for environmental problem recently issued. Secondly, because beings are fundamentally all equal in holistic world, the principle of equality is basic principle in the ethics of sangsaeng. Finally, in relation to the principle of equality, the ethics of sangsaeng needs 'Haewon' as the first moral rule because it is a practical method for solution to various social inequality - racism, sexism, regionalism and so on.

• Advances in aircraft and spacecraft science
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• 제10권3호
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• pp.257-279
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• 2023

This manuscript is dedicated to deriving the closed form solutions of free vibration of viscoelastic nanobeam embedded in an elastic medium using nonlocal differential Eringen elasticity theory that not considered before. The kinematic displacements of Euler-Bernoulli and Timoshenko theories are developed to consider the thin nanobeam structure (i.e., zero shear strain/stress) and moderated thick nanobeam (with constant shear strain/stress). To consider the internal damping viscoelastic effect of the structure, Kelvin/Voigt constitutive relation is proposed. The perforation geometry is intended by uniform symmetric squared holes arranged array with equal space. The partial differential equations of motion and boundary conditions of viscoelastic perforated nonlocal nanobeam with elastic foundation are derived by Hamilton principle. Closed form solutions of damped and natural frequencies are evaluated explicitly and verified with prestigious studies. Parametric studies are performed to signify the impact of elastic foundation parameters, viscoelastic coefficients, nanoscale, supporting boundary conditions, and perforation geometry on the dynamic behavior. The closed form solutions can be implemented in the analysis of viscoelastic NEMS/MEMS with perforations and embedded in elastic medium.

• 전자공학회논문지CI
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• 제41권2호
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• pp.23-32
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• 2004

질의 최적화기의 중요 기능 중에 하나는 질의가 주어졌을 때 질의 조건을 만족하는 입력 레코드의 개수를 추정하는 일이다. 관계 데이터베이스와 마찬가지로 공간 데이터베이스에서 질의 결과 크기 추정은 입력 데이터 공간을 버켓으로 불리는 작은 영역으로 분할한 후 분할된 영역에 대해서 질의 결과 ■기를 추정한다. 추정의 정확도는 작은 영역으로 분할할 때 근사 계산한 데이터와 실제 데이터의 차이에 의해서 결정되며 이것은 공간 분할을 어떻게 분할하는가에 달려 있다. 기존의 방법은 일차원에 많이 사용되는 데이터의 범위를 균일하게 하는 너비 균등 방법과 빈도수의 합을 일정하게 하는 높이 균등 방법을 공간상의 이차원에 적용한 면적 균등 분할과 개수 균등 분할 방법에 기초를 두고 있다. 본 논문에서 제안한 방법은 공간을 분할할 때 데이터의 범위와 빈도수의 곱을 면적으로 나타낸 후 면적 값의 차이가 가장 큰 순서로 버켓을 정하는 방법으로 데이터 범위와 빈도수를 동시에 고려하여 최적의 버켓을 결정한다. 본 논문에서는 제안한 방법과 기존의 방법을 실제 데이터와 인위데이터를 사용하여 질의 크기, 버켓수, 데이터 개수, 데이터 크기의 변화에 대해서 질의 결과 추정에 대한 정확도를 비교, 분석하여 제안한 방법의 성능 우수성을 확인한다.

• 대한간호학회지
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• 제27권1호
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• pp.169-177
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• 1997

This study aims at empirically clarifying the relationship between power and the interpersonal conflict, including nurses' understanding of their relative power, the causes of interpersonal conflicts with the nurses, and strategies to resolve conflicts, in order to understand how nurses' relative power affect their conflicts. For the empirical survey, the population was defined as all the nurses working at a medical organization in Seoul, Korea. 1083 nurses were selected as the sample for the questionnaire survey and statistical analyses. For the sampling, 32 medical organizations were selected by a stratified random method and sub-samples were arbitrarily drawn from each organization to obtain the final sample of 1083 nurses who responded to the questionnaire designed by the reseacher. According to the result of the study, most nurses experience conflict more than once a month, and 70.4% of the respondents answered that interpersonal conflicts were directly or indirectly caused by power relations. which indicates that they perceive power relations as the main cause of interpersonal conflicts. Nurses experienced the most conflicts with interns and residents(29.7%), then patients and their families(24.3%), higher-positioned nurses(12.3%), nurse colleagues(7.7%), lower-positioned nurses(6.5%), and staff doctors(5.1%). If we classify these into three groups. the frequency of the conflicts, from most frequent to least. is in the order of doctors. nurses, and patients. In terms of relative power, nurses perceive that they have greater power than patients and their families, lower-positioned nurses, and nurse colleagues. In contrast, nurses perceive that they have less power than interns and residents, higher-positioned nurses. and staff doctors. Among these groups. nurses perceive that they have the most power over patients and the least over staff doctors. These results indicate that nurses tend to experience more conflicts with members of groups that are stronger than themselves in terms of relative power, Nurses use positive strategies such as the compromise strategy(32.3%) or the collaboration strategy (20.3%) to manage conflicts, more than other strategies. However, they use avoidance or competition strategy more at the earlier stage, compromise strategy more in the mid stage, and collaboration strategy more at the later stage of the interpersonal conflict. In relation to power, nurses use the collaboration strategy or the compromise strategy more when their perceived power is greater than or equal to their counterpart's, and they use the avoidance strategy or the accommodation strategy if their power is less. In terms of source of power, nurses' perceived relative power is greater in the order of referent power. expert power, reward power, legitimate power. and coercive power. where referent power is perceived as having the greatest power and coercive power is least. Most nurses(69.3%) used their power to resolve a conflict. with positive outcomes. Expert power was used most frequently. Overall. this study strongly indicates that the enhancement of power of nurses to have equal power relations with doctors would heighten the success of conflict resolution, since power is the main cause of conflicts. Specifcally. nurses experience most conflicts with doctors against whom they perceive the greatest gap in power. and the choice of a conflict management strategy depend upon their power relations.

• 수산경영론집
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• 제29권2호
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• pp.111-141
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• 1998

Why are auctions so prevalent in fisheries fields\ulcorner One answer is, perhaps, that fisheries products have no standard value. The price of any catch of fish (at least of fish destined for the fresh fish market) depends on the demand and supply conditions at a specific moment of time, influenced by prospective market developments and prices must be remade for each transaction. There are various auction schemes including written-bid method in Korea. It is difficult to make decision the application of auction selling in market distribution. One reason is the absence of adequate data on which to base firm statements. There is very little precise information about the relative volume handled by auction scheme as compared with other sales schemes Because of the paucity reliable data, one must depend largely on qualitative in attempting to above this problem. This paper is designed to examine which auction scheme is more efficient as a economic tool by introducing the three auctions, as samples, utilized in Koheung peninsula. Koheung coast with abundant fisheries resource, locates on the Middle-South part in Korea and has three auction firm operating by fisheries cooperatives. fur selling of dry fish included sea weed, live fish and fresh fish respectively, As a result, 1 found that there are three interesting auction schemes as follow : 1. More than one winners are selected as buyers. The highest bidder can at first get fishes he wants to buy, second winner can get surplus fishes after the highest bidder employes one's privilege with the highest pay, and next winner would be a buyer if fishes would be left in sequence after being sold with higher price. Every fisherman can sell one' s fishes with equal unit price if he delivery it to the winner within one day. Therefore, all the vendors feel they are equal members of fisheries cooperation. 2. Written-bid pricing on the cover of handy book. It is easy to write and to erase the figure more than on the small black board, and is convenient also to keep in the pocket. 3. Auctioning on the fixed platform with fixed fish tank is a very fast auction scheme in spite of short displaying time. Auctioneer presides bidding at one place on the fixed platform, instead of moving, vendors should carry a container of live fishes in the fish tank into showing table in front of would-be buyers and auctioneer. Although the applicability of the auction system to a marketing problem depends in part on subjective considerations by those making decision, basically it is a matter of comparative economic efficiency. In general, if the scheme maximizes returns in relation to the effort expanded by both buyers and sellers, it will be utilized. If it does not, a more efficiency may take place over a period of time, but, even more important, those making decisions may become aware of the potentialities of new schemes. Therefore, in order to applicate the three interesting auction schemes introduced in this paper to other fisheries market, it is necessary not only to analyze many other auction schemes but also to compare the economic efficiency those schemes utilizing in other fisheries market.

• 대한수학교육학회지:수학교육학연구
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• 제22권1호
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• pp.53-68
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• 2012

본 연구는 아이들이 문장제 또는 수식 형태의 나눗셈의 결과를 여러 타입의 분수들-진분수, 가분수, 대분수-과 연관시키면서 분수가 가지는 여러 하위 개념 중 몫에 대한 개념 도식을 어떻게 구성해 가는지에 대하여 미국의 5학년 초등학생 네 명을 대상으로 이루어졌다. 실험 결과는 다음과 같았다. 균등분배 상황에서, 아이들은 나눗셈을 두 가지 방식으로 개념화하였다. 첫째, 아이들이 나눗셈을 통해 대분수 형태의 몫을 산출했을 경우, 이 대분수 형태의 몫은 진분수와 가분수 형태의 분수들을 부분-전체의 하위개념이 아니라 몫이라는 하위개념으로 이해하는데 개념적인 기초가 되었다. 둘째, 진분수 형태의 몫을 얻은 경우, 아이들은 그 몫을 곱셈구조의 예로 보려는 경향이 있었다. 즉, $a{\times}b=c$ ; $a{\div}c=\frac{1}{b}$ ; $b{\div}c=\frac{1}{a}$. 하지만, 장제법 계산은 소수 형태의 몫을 생산함으로써 아이들이 이 구조를 깨닫는 것을 어렵게 했다.

• 건축역사연구
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• 제20권1호
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• pp.117-133
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• 2011

This thesis is a study on the oldest feng-shui book "Janggyeong(葬經)". Specially, it is a focus on the feng-shui orientation method so called Sasepalryongbub(四勢八龍法) in that book. This method is to identify fortune and misfortune with the directions to be measured by a feng-shui compass. Sa(四) of Sase(四勢) is the four pieces of direction of dividing 12 parts for 360 degree circle. To divide for 12 parts is related with 12-Jiji(地支). Sa mean In(寅), Sin(申), Sa(巳), and Hae(亥). Se of Sase means a large stem of mountain. Generally, Sase are the big mountain stems of the four directions as In, Sin, Sa, and Hae. Pal(八) of Palryong(八龍) mean the 8 parts of equal division for 360 degree. It is related with Palgoe(八卦) that divide for 8 parts equally. Palgoe are Jin(震), Li(離), Gam(坎), Tae(兌), Geon(乾), Gon(坤), Gan(艮), and Son(巽). Ryong(龍) of Palryong(八龍) is a stem of mountain that is measured with 8 parts of equal division feng-shui compass. Sasepalryongbub make a connection between Sase and Palryong. When they are connected, it is a good fortune like as In(寅) and Li(離), Sin(申) and Gam(坎) or Gon(坤) or Gan(艮), Sa(巳) and Tae(兌) or Geon(乾), Hae(亥) and Jin(辰) or Son(巽). It is based on two theories. The one is 12-Unseongron(運星論), the other is one of Ohaengron(五行論) as Samhap-Ohaeng(三合五行). 12-Unseongron begins from dividing all human life affairs with 12 steps. Saeng(生), Wang(旺), Myo(墓) are the very important things among 12 steps. Saeng means starting, Wang means flourishing, Myo means keeping. Samhap-Ohaeng is made with Jiji of Saeng, Wang and Myo steps about 12-Unseongron. Saeng is the most important thing among of Saeng, Wang and Myo in Sasepalryongbub which means birth. Saeng of Jiji direction can help Palgoe direction as a counterpart. Like this, the good relation of Sase and Palryong is that Jiji direction can help Palgoe direction. For example, there are In(寅) of Jiji and Li(離) of Palgoe, can be explained as these kinds of the good relations. In view of Samhap-Ohaeng, In of Jiji is regared as Saeng of fire(火). This fire- Saeng-In as Jiji can help fire- Li as Palgoe. It can be said as a good condition that Sase and Palryong be connected like this case. This is the main content of Sasepalryongbub as being treated in this study.