• 한국작물학회지
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• 제63권3호
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• pp.196-204
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• 2018

현재까지 최고품질 벼 품종은 수광벼를 포함하여 15개 품종이 육성되었다. 본 연구는 이 중 전북지역 적응 품종(7개)을 대상으로 간척지에 적합한 품종을 선발하기 위해 생육특성, 수량, 품질 및 식미치를 분석한 결과는 다음과 같다. 1. 출수기는 2년 평균 수광벼가 가장 8월 12일로 가장 빨랐고, 영호진미의 분얼수는 2년 동안 평균 19개로 편차가 없어 재배 안전성이 우수하였다. 간장은 2년 평균 수광벼가 81.8 cm로 가장 컸고 수장은 현품벼가 가장 컸다. 2. 포장도복, 깨시무늬병, 잎짚무늬마름병 및 기타 병해충도 모든 품종에서 2년간 관찰되지 않았다. 3. 등숙률은 2015년에 수광벼가 가장 높았지만 2016년 및 2년 평균은 품종간 차이가 없었다. 천립중은 신동진벼가 2년 평균 27.7 g으로 가장 높았고, 6개 품종은 유의적인 차이가 없었다. 수당립수는 2015년에 신동진벼가 가장 많았고 2016년에는 호품벼 및 수광벼가 많았다. 그러나 2년 평균값은 품종별 차이가 없었다. 수량은 2년 평균은 신동진벼(590) > 호품벼(575) > 영호진미벼(552) > 수광벼(551) > 호품벼(543) > 미품벼(534) > 해품(498 kg/10a)순으로 높게 조사되었으나 유의성은 없었다. 호품벼의 연 차간 수량 차이가 108 kg/10a로 가장 컸고 영호진미벼(12 kg/10a), 미품벼(20 kg/10a) 및 수광벼(24 kg/10a)의 연차간 수량차이가 상대적으로 적어 재배 안정성을 보였다. 2년간 천립중, 수당립수 및 수량의 평균값에 대해 상관관계를 분석한 결과 천립중 차이가 수량 차이의 직접적인 원인인 것으로 확인되었다(p < 0.05). 4. 2015년에 완전립 비율은 미품벼, 영호진미벼, 해품벼, 현품벼 및 신동진벼가 유의성 있는 증가를 보였고, 2016년에는 영호진미벼의 완전립 비율이 가장 높았다. 그러나 2년 평균값은 품종들간 유의성이 없었다. 단백질 함량은 2015년에는 영호진미벼, 2016년에는 해품벼에서 유의성 있는 차이를 보였으나 2년 평균값은 차이가 없었다. 아밀로스 함량은 수광벼의 2년 평균값이 가장 낮았으나 다른 품종들과 유의성은 없었다. 토요식미계의 값은 미품벼 및 수광벼 순으로 높았다. 5. 따라서 수량 및 완전미율 연차간 변이, 단백질 및 아밀로스 함량, 토요식미치를 기준으로 평가했을 때 전북지역 간척지 적합 품종은 수광벼로 판단된다.

• Structural Engineering and Mechanics
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• 제11권6호
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• pp.591-604
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• 2001

In this paper, a finite element with embedded displacement discontinuity which eliminates the need for remeshing of elements in the discrete crack approach is applied for the progressive fracture analysis of concrete structures. A finite element formulation is implemented with the extension of the principle of virtual work to a continuum which contains internal displacement discontinuity. By introducing a discontinuous displacement shape function into the finite element formulation, the displacement discontinuity is obtained within an element. By applying either a nonlinear or an idealized linear softening curve representing the fracture process zone (FPZ) of concrete as a constitutive equation to the displacement discontinuity, progressive fracture analysis of concrete structures is performed. In this analysis, localized progressive fracture simultaneous with crack closure in concrete structures under mixed mode loading is simulated by adopting the unloading path in the softening curve. Several examples demonstrate the capability of the analytical technique for the progressive fracture analysis of concrete structures.

• Steel and Composite Structures
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• 제24권2호
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• pp.151-176
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• 2017

This paper deals with general equations of motion for free vibration analysis response of thick three-layer doubly curved sandwich panels (DCSP) under simply supported boundary conditions (BCs) using higher order shear deformation theory. In this model, the face sheets are orthotropic laminated composite that follow the first order shear deformation theory (FSDT) based on Rissners-Mindlin (RM) kinematics field. The core is made of orthotropic material and its in-plane transverse displacements are modeled using the third order of the Taylor's series extension. It provides the potentiality for considering both compressible and incompressible cores. To find these equations and boundary conditions, Hamilton's principle is used. Also, the effect of trapezoidal shape factor for cross-section of curved panel element ($1{\pm}z/R$) is considered. The natural frequency parameters of DCSP are obtained using Galerkin Method. Convergence studies are performed with the appropriate formulas in general form for three-layer sandwich plate, cylindrical and spherical shells (both deep and shallow). The influences of core stiffness, ratio of core to face sheets thickness and radii of curvatures are investigated. Finally, for the first time, an optimum range for the core to face sheet stiffness ratio by considering the existence of in-plane stress which significantly affects the natural frequencies of DCSP are presented.

• 한국가구학회지
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• 제20권4호
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• pp.374-387
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• 2009

Gerrit Rietveld who is Dutch architect and furniture designer had explored the plastic abstractness based on the universality of De Stijl principle. He had tried to expand the boundary of furniture design bound to traditional form and decorative aesthetics. Beginning of 20th century, he opened the new aesthetic realm of pure and abstract value for furniture design for the first time. Through this research, the results can be summarized as follows. The characteristics of his deign are abstractness, spatial consideration and tectonic construction. The abstractness is attained by simplifying constructional material into geometrical forms such as straight line, rectangle and square. And he adopted unconventional way of construction in order to increase this abstractness. The space included in his furniture can be expressed in the new technology of joint, the visual transparency using linear material, and the destruction of corners. All these aspects harmoniously helped the feeling of architectural space of flow. Through the exposed frame of furniture, Rietveld emphasized on the tectonic construction by methodological treatment such as piling-up or overlapping material. The characteristics of Gerrit Rietveld's design are abstract, spatial and tectonic. These aesthetical tendencies could be understood as a junction between De Stijl's principles and modern architecture's spatial preferences-flow and extension of space-.

• 한국실내디자인학회논문집
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• 제16권1호
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• pp.48-55
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• 2007

Proceedings in a new field of sciences and technologies like genetic engineering challenge to conventional concepts. It demonstrates a certain disappearance in conventional concepts that dominants our perceptions, such as organic, mechanical, and dichotomic concept of informative materials, and that is to be extended as a potential possibility. Then, what is a new space where our bodies that feel and cherish in their mind should live in these days as well as it makes senses by itself and should affect the principle that makes worlds? In addition, this study proposes a frame in the analysis in order to understand a section of modern designs with the question of 'what is the change in the relationship between relative structures in spaces and objects from a design point of view according to new structural concepts of body?' The major point of this analysis can be realized based on the assumption of the extension of the characteristics in the change of structural relationship in the aspect of post structuralism that includes non-structuralized relationship represented in modern philosophy, arts, and architectural works. Then, it can be accomplished as positive ideas in the foundation of space designs in future including the understand of 'new structural relationship' that can't be expressed as rationality and causal sequence by considering how the experiment conducted using several topics on body can be projected onto spaces through the process applied in the experiment.

• 대한수학회지
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• 제55권1호
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• pp.101-129
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• 2018

From an analytical perspective, we introduce a sequence of Cartier operators that act on the field of formal Laurent series in one variable with coefficients in a field of positive characteristic p. In this work, we discover the binomial inversion formula between Hasse derivatives and Cartier operators, implying that Cartier operators can play a prominent role in various objects of study in function field arithmetic, as a suitable substitute for higher derivatives. For an applicable object, the Wronskian criteria associated with Cartier operators are introduced. These results stem from a careful study of two types of Cartier operators on the power series ring ${\mathbf{F}}_q$[[T]] in one variable T over a finite field ${\mathbf{F}}_q$ of q elements. Accordingly, we show that two sequences of Cartier operators are an orthonormal basis of the space of continuous ${\mathbf{F}}_q$-linear functions on ${\mathbf{F}}_q$[[T]]. According to the digit principle, every continuous function on ${\mathbf{F}}_q$[[T]] is uniquely written in terms of a q-adic extension of Cartier operators, with a closed-form of expansion coefficients for each of the two cases. Moreover, the p-adic analogues of Cartier operators are discussed as orthonormal bases for the space of continuous functions on ${\mathbf{Z}}_p$.

• 한국실내디자인학회논문집
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• 제27권1호
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• pp.12-20
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• 2018

After the "Landscaping Law" was enacted in 2007 Korea, national and local governments has been responding swiftly by seeking various methods. Seoul Metropolitan City and other municipalities have established "Seoul Coloring and Systematization" project, which analyzes and extracts the humanities, humanities and natural environments in 2007 as an opportunity to recognize the importance of environmental color. However, it is necessary to slightly supplement the color scheme created by the observer's concept. In this way, you have to find the color of the environment in a city where real life takes place. The city's environmental color has the concept of "walking" as the basic human behavior. Because the average speed is 4km, it differs from that of a vehicle that travels more than 60km per hour. Also, most of the frontage zone is used except for special cases. Therefore the characteristics of the environmental color and frontage zone on the road side were concluded in this paper as Single Type, Connection Type, and Extension Type. In addition, the principle of environmental color of city was established by the change of texture according to space of time and the characteristics of urban scale, and new media characteristics were found in various interactions. The results of this study suggest an environmental coloring strategy for workability such as hue continuity, hue harmonization and integrated design.

• 대한수학회보
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• 제47권4호
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• pp.675-685
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• 2010

In this paper, we consider a new class of regularized (nonconvex) generalized mixed variational inequality problems in real Hilbert space. We give the concepts of partially relaxed strongly mixed monotone and partially relaxed strongly $\theta$-pseudomonotone mappings, which are extension of the concepts given by Xia and Ding [19], Noor [13] and Kazmi et al. [9]. Further we use the auxiliary principle technique to suggest a two-step iterative algorithm for solving regularized (nonconvex) generalized mixed variational inequality problem. We prove that the convergence of the iterative algorithm requires only the continuity, partially relaxed strongly mixed monotonicity and partially relaxed strongly $\theta$-pseudomonotonicity. The theorems presented in this paper represent improvement and generalization of the previously known results for solving equilibrium problems and variational inequality problems involving the nonconvex (convex) sets, see for example Noor [13], Pang et al. [14], and Xia and Ding [19].

• 대한정형외과스포츠의학회지
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• 제2권1호
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• pp.6-14
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• 2003

전방십자인대재건술의목표는안정된관절과 pivot shift 현상을 제거하고, 반월상 연골을 보호하고, 관절운동범위를 유지하고, 술후슬개-대퇴관절의문제를최소화하도록재활하여수상전의운동수준으로복귀시키는것이다. 그래서전방십자인대 재건술은급성기에수술은피하고, 수술 전에재활치료를통하여관절운동범위와 대퇴사두고근의근력을얻은다음, 환자가육체적으로나정신적으로준비가될때까지수술을연기한다. 수술후재활치료는슬관절의완전신전과closed kinetic chain 운동을강조하며, 수술후정기적인방문으로재활치료를지도해주고장기추시해야하는것이중요하다.

• 한국운동역학회지
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• 제16권4호
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• pp.73-81
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• 2006

The purpose of this study was to investigate the effects of strength training on knee joint torque during walking in an adolescent with trisomy-21 Down syndrome. One adolescent with Down syndrome and one normal child participated in this study. Strength training consisted of eight exercises: squat, hamstring curl, hip adduction, hip abduction, knee extension, toe raise, sit-ups, and hyperextension of the waist. The participant with Down syndrome was participated in strength training for 12 weeks, three times a week, three sets, 10-15 RM; resistance was adjusted according to the principle of progressive overload. To measure the effect of strength training, isokinetic strength variables and knee joint torques were measured before training and after 12 weeks of training. The participant with Down syndrome had some abnormalities in controlling knee motion during walking due to muscle hypotonia, ligament laxity, and weakness of muscles. Post-training isokinetic strength increased compared to pre-training measurements. Knee range of motion were increased after strength training. Strength training did not affect ad/adduction and in/exteranl moments but did have an effect on flexor/extensor moment and timing.