• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권9호
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• pp.2232-2245
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• 2013

The present study proposes efficient procedural modeling methods for enabling the growth and creation of various trees with minimal user control. Growth volume algorithms are utilized in order to easily and effectively calculate many parameters that determine tree growth, including branch propagation. Procedural methods are designed so that users' interactive control structures can be applied to these algorithms to create unique tree models efficiently. First, through a two-line-based interactive growth volume control method, the growth information that determines the overall shape of the tree is intuitively adjusted. Thereafter, independent branch control methods designed to control individual branches are added to the growth deformation in order to enable the growth of unique trees. Whether the growth processes of desired trees can be easily and intuitively controlled by the proposed method is verified through experiments. Methods that can apply the proposed methods are also verified.

• 대한안전경영과학회지
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• 제2권2호
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• pp.155-165
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• 2000

Many enterprises are performing the effective database applications with VAN(Value Added Network) or WAN(Web Added Network) . But it is very difficult and expensive. So we suggest low-cost database system within long distance area through personal computers. This system is very powerful for flexibility. It may be estimated it's value highly because they develop the program without high programming skill. This study would be used between company with company and/or between branch with branch, for example, customer claim information, inventory information, product order etc. It is important not importing document but importing data in document. Then end-user can accomplish analysis and decision-making with their own database. It would enhance productivity in many enterprises.

• Advances in concrete construction
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• 제6권6호
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• pp.585-610
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• 2018

In this study, vibration analysis of a concrete foundation-reinforced by $SiO_2$ nanoparticles resting on soil bed is investigated. The soil medium is simulated with spring constants. Furthermore, the Mori-Tanaka low is used for obtaining the material properties of nano-composite structure and considering agglomeration effects. Using third order shear deformation theory or Reddy theory, the total potential energy of system is calculated and by means of the Hamilton's principle, the coupled motion equations are obtained. Also, based an analytical method, the frequency of system is calculated. The effects of volume percent and agglomeration of $SiO_2$ nanoparticles, soil medium and geometrical parameters of structure are shown on the frequency of system. Results show that with increasing the volume percent of $SiO_2$ nanoparticles, the frequency of structure is increased.

• Structural Engineering and Mechanics
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• 제70권1호
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• pp.97-112
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• 2019

Using the classical, first order and third order shear deformation plates theories the motion equations of an undrained porous FG circular plate which is located on visco-Pasternak elastic foundation have been derived and used for free vibration analysis thereof. Strains are related to displacements by Sanders relationship. Fluid has saturated the pores whose distribution varies through the thickness according to three physically probable given functions. The equations are discretized and numerically solved by the generalized differential quadrature method. The effect of porosity, pores distribution, fluid compressibility, viscoelastic foundation and aspect ratio of the plate on its vibration has been considered.

• 동굴
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• 제70호
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• pp.29-35
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• 2006

21 century as the knowledge base society which demands an originality and a variety the updated technology and knowledge creation ability quality and national power of life of the citizen were under controlling. Consequently, the extension of development and originality of the ability which is various leads and studying voluntary character and the ability back the education which it considers actively it raises and the infield it does. With activation plan of cave resources home page of Speleological Society of Korean like home page of Speleological Society of Japan cave crane information, caving information, cave Q/A, cave publication, the relation site back the possibility of seeing information regarding the cave which is various in order to be, it reorganizes. The possibility of coming in contact in order to be, various branch information also the general rain specialist regarding the cave resources. Currently the possibility of seeing the various branch data for the application of the cave resources at any time it is, home page of Speleological Society of Korean the possibility of doing to lead in order to be, it proposes the plan. From one person it will be able to study the data regarding the cave of various field in order, all curricular materials regarding the cave resources the educational program which leads a home page about under developing it proposes the activation plan of the cave resources.

• 한국동물위생학회지
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• 제16권2호
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• pp.120-126
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• 1993

Clinically healthy 66 female Maniker breed chicken(22 of 2-week-old : group A, 23 of 8-week-old： group B and 21 of 27-week-old： group C) and 66 female Manina breed chicken (21 of 2-week-old : group D, 22 of 8-week-old : group E and 23 of 27-week-old : group F) were examined to establish physiological basic data on serum total Creatine phosphokinase (CPK) activities and CPK isoenzymes fractions. The results obtained were summarized as follows； 1. Serum total CPK activities were $1,088{\pm}254.0\;IU\;/{\ell},$ $1,454{\pm}337.2\;IU\;/{\ell}$ and $1,440{\pm}526.3\;IU\;/{\ell}$ in gorup A, group B and group C of Maniker breed, respectively. Group B and group C showed higher values than that of group A (P<0.01) meaning high values nth aging. 2. Serum total CPK activities were $1,676{\pm}420.5\;IU\;/ {\ell},$ $1,007{\pm}283.1\;IU\;/{\ell}$ and $862{\pm}294.5\;IU/{\ell}$ in group D, group E and group F of Manina breed, respectively. Group D showed the highest value among groups (P<0.01) and Manina breed showed the low values of serum total CPK activities with aging. 3. Manina breed at 2-week-old and Maniker breed at 8-week-old and 27-week-old showed significant high values of total serum CPK activities in breed differance (P<0.01) 4. In the pattern of serum CPK isoenzyme fractions, group A and group B were high with decreasing order of $CK_3>CK_2>CK_1$ and group C was high with decreasing order of $CK_2> CK_3>CK_1$ Groihp D, E and F showed the same pattern with decreasing order of $CK_2>CK_3> CK_1.$ 5. Significance of CPK isoenzymes fractions in breed differance was only found at 8-week-old. $CK_1\;and \;CK_3$ in Maniker breed (P<0.05), and $CK_2$ in Manina breed were higher than that of the other breed (P < 0.01).

• 한국약용작물학회지
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• 제4권4호
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• pp.277-282
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• 1996

시호의 개화습성 및 수정양식을 파악하여 육종의 기초자료로 이 음하고자 본 실험 을 수행하였다. 지경발달에 있어서 추정된 1차지경의 총수는 106.6개였고, 2차지경까지 발달하여 개화되었을 때 총 소화수의 이론치는 9,622개였다. 지경순위별 화기의 크기 정도는 산경, 소산경, 화판, 자예, 웅예, 자방표면, 소화악의 크기 모두 주경 > 1차지경 > 2차지경의 순으로 작아지는 경향을 나타내 지경의 발달이 진전될수록 소화의 크기가 작아진다는 것을 알 수 있었다. 지경전개별과 동일 지경내 화총 등의 개화시기는 뚜렷이 구분되었다. 소화, 소화총, 화총을 각각 망사 및 유산지로 피봉시켜 본 결과 결실이 전혀 이루어지지 않아 품매보다는 충매에 의한 방법으로 수정하는 타식성 식물로 인정되었으나, 식물체 전체를 망사로 씌웠을 때는 일부결실이 이루어져 부분자식성작물로 판단되었다. 화기 성숙단계별 수분능력은 자예성숙기인 8일 이후부터 결실이 가능하였으며, 특히 $11{\sim}13$일에 결실율이 높게 나타났다.

• Membrane and Water Treatment
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• 제9권6호
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• pp.421-434
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• 2018

Decision-makers have different and sometimes conflicting goals with utilities in operating dam reservoirs. As repeated interactions exist between decision-makers in the long-term, and the utility of each decision-making organization is affected not only by its selected strategy, but also by other rivals' strategies; selecting and prioritizing optimum strategies from a decision maker's point of view are of great importance while interacting with others. In this paper, a model based on a fuzzy set theory, for determining the priority of decision-makers' strategies in optimal qualitative-quantitative operation management of dam reservoir is presented. The fuzzy priority matrix is developed via defining membership functions of a fuzzy set for each decision maker's strategies, so that all uncertainties are taken into account. This matrix includes priorities assigned to possible combination for other decision makers' strategies in bargaining with each player's viewpoint. Here, the 15-Khordad Dam located in the central part of Iran, suffering from low water quality, was studied in order to evaluate the effectiveness of the model. Then, the range of quality of water withdrawal agreed by all decision-makers was determined using the prioritization matrix based on fuzzy logic. The results showed that the model proposed in the study had high effectiveness model.

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제2권7호
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• pp.451-460
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• 2013

높은 테스트 커버리지 달성을 위해 심볼릭 실행, 자료 흐름 분석 및 제약 해결 기법 등을 이용하여 테스트 데이터 생성을 하는 것이 일반적이다. 최근에 그와 같은 정교한 수단 없이도 높은 커버리지를 효과적으로 달성 할 수 있는 방법이 제안되었다. 그러나 이 방법도 실행 중에 다른 메모리 로케이션들이 바인딩되는 분기 조건을 갖는 프로그램에 대해서는 높은 커버리지를 가져오는 테스트 데이터 생성이 어려웠다. 특히 플래그 조건을 가지는 프로그램에 대해서는 특정 분기들이 실행되지 않아 높은 커버리지를 달성하지 못하는 경우가 발생한다. 이 논문에서는 이 문제를 다루기 위하여 기존 커버리지 기준을 개선한 동적 분기 커버리지 기준들과 동적 분기에 기반 한 테스트 데이터 생성 전략을 제안한다. 실험을 통하여 플래그 조건이 있는 프로그램들에 대해서도 제안된 방법이 기존의 방법에 비해 효과적으로 커버리지를 달성함을 보인다. 요약은 무슨 연구를 어떻게 수행하였는지, 주된 연구결과와 그 중요성에 관해 간결하게 기술하여야 한다.

• 한국산업보건학회지
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• 제31권4호
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• pp.473-483
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• 2021

Objectives: The present study aimed to evaluate the potential toxicity of 2-butoxyethanol after intratracheal instillation in male rats. Methods: In order to calculate median lethal dose (LD₅₀) of 2-butoxyethanol using Probit analysis with SAS program, the 2-butoxyethanol was administered with dose levels of 0, 101.64, 203.28 and 406.56 mg/kg by once intratracheal instillation to male rats. During the test period, clinical signs, mortality, body weights, organ weights, hematology, and serum biochemistry were examined. At the end of 14 days observation period, all animals were sacrificed and gross finding and histopathological examination were performed. Results: All animals of 406.56 mg/kg group died within 2 weeks after the administration of 2-butoxyethanol. Treatment-related clinical signs, gross observation and histopathological changes (mucous cell hyperplasia, alveolar macrophage aggregation, and hemorrhage) of lung exhibited an increased in 2-butoxyethanol treated groups in a dose dependent manner. However, there were no changes in the organ weights, hematology and serum biochemistry, and histopathology of any other organ except lung. Conclusions: On the basis of the results, it was concluded that a single intratracheal instillation of 2-butoxyethanol in male Sprague-Dawley rats resulted in some adverse effects on mortality, clinical sign, and histopathology in the lung. In the experimental conditions, the LD₅₀ of 2-butoxyethanol was considered to be 287.2 mg/kg and lung was founded to be the target organ of 2-butoxyethanol.