• Title/Summary/Keyword: Balancing well

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Analysis of Air Flow Rate Distribution for the Bathroom Exhaust System in High-rise Buildings Using T-method (T-method를 이용한 고층 아파트 욕실 배기 시스템의 층별 유량분배 해석)

  • 문종선;강석윤;이승철;유호선;이재헌
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.16 no.3
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    • pp.265-272
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    • 2004
  • Based on the T-method, a new scheme for predicting air flow rate distribution in a bathroom exhaust system is developed. Introduction of individual duct route enables us to disintegrate a complicated multi-fan ductwork into a set of simultaneous single-fan subsystems. The scheme is validated via the analysis of a well-posed test problem, showing physical consistency. In order to demonstrate the utility and capability of our method, the bathroom ventilation system in a 20-story residential building is selected as an example. Under the typical design condition, the air flow rate of each exhaust fan at the balancing point is successfully predicted, and such information can lead to an engineering estimation for the overall system performance. While some deficiencies in ventilation are found at bathrooms at lower floors with 6mmAq-rated exhaust fans, they disappear over the whole building by using fans of enhanced static pressures, 7 and 8mmAq. Finally the present scheme seems to be useful for practical design of multi-branched, multi-fan ventilation systems.

Water Sorption/Desorption Kinetics and Convective Drying of Eucalyptus globulus Wood

  • AMER, Mahyoub;KABOUCHI, Bousselham;El ALAMI, Salah;AZIZE, Brahim;RAHOUTI, Mohamed;FAMIRI, Abderrahim;FIDAH, Abdelwahed
    • Journal of the Korean Wood Science and Technology
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    • v.47 no.5
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    • pp.557-566
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    • 2019
  • Radial and tangential water diffusion in Eucalyptus globulus wood was investigated using three mature trees from a forest in Khemis Sahel (North Morocco). Absorption and desorption kinetics experiments were conducted at ambient temperature ($25^{\circ}C$) and $30^{\circ}C$, respectively, and a relative humidity of 60%. The diffusion coefficients in the two directions were determined under imposed hygrothermal conditions; they were greater in the radial direction for the absorption as well as desorption processes. Convective drying under load, preceded by reconditioning and followed up by balancing, revealed the drying conditions that corresponded to the appropriate drying schedules for E. globulus wood. This was verified by measuring the cracks and bowsbefore and after drying of boards.

Control Strategies for Landing Quadcopters on Ships with Legged Platform Based on Impedance Control (선박 위 착륙을 위한 임피던스 제어기반 쿼드콥터 족형 랜딩플랫폼 제어 전략)

  • Hwang, Seonghyeon;Lee, Seunghyeon;Jin, Seongho;Lee, Inho
    • The Journal of Korea Robotics Society
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    • v.17 no.1
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    • pp.48-57
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    • 2022
  • In this paper, we propose a legged landing platform for the quadcopter taking off and landing in the ship environment. In the ship environment with waves and winds, the aircraft has risks being overturned by contact impact and excessive inclination during landing on the ship. This landing platform has four landing legs under the quadcopter for balancing and shock relief. In order to make the quadcopter balanced on ships, the position of each end effector was controlled by PID control. And shocks have mainly happened when quadcopter contacts the ship's surface as well as legs move fast. Hence, impedance control was used to cope with the shocks. The performance of the landing platform was demonstrated by a simulation and a prototype in three sea states based on a specific size of a ship. During landing and tracking the slope of the ship's surface, oscillations of rotation and translation from the shock were mitigated by the controller. As a result, it was verified that transient response and stability got better by adding impedance control in simulation models and prototype experiments.

Artificial Intelligence Applications as a Modern Trend to Achieve Organizational Innovation in Jordanian Commercial Banks

  • Al-HAWAMDEH, Majd Mohammed;AlSHAER, Sawsan A.
    • The Journal of Asian Finance, Economics and Business
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    • v.9 no.3
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    • pp.257-263
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    • 2022
  • The objective of this study was to see how artificial intelligence applications affected organizational innovation in Jordanian commercial banks. Both independent and dependent variables were measured in three dimensions: expert systems, neural network systems, and fuzzy logic systems for artificial intelligence applications variable. Product innovation, process innovation, and management innovation for the organizational innovation variable. To achieve study objectives, a questionnaire was developed and distributed to a sample of one hundred fifty-three managers in Jordanian commercial banks, who were selected according to the simple random sampling method. Except for the neural network systems dimension, which comes in at an average level, the study indicated that there is a high level of organizational innovation and artificial intelligence applications. Furthermore, the findings revealed that artificial intelligence applications have a significant impact on organizational innovation in Jordanian commercial banks, with the most important artificial intelligence application being a fuzzy logic system. The study suggested keeping track of technological advancements in the field of artificial intelligence applications and incorporating them into banking operations by benchmarking with the best commercial bank practices and allocating a portion of the budget to technological applications and infrastructure development, as well as balancing between technology use and information security risks to ensure client privacy is protected.

Characterization of PUL Haplotypes and Its Evolutionary Analyses in Korean Rice Accessions

  • Thant Zin Maung;Yong-Jin Park
    • Proceedings of the Korean Society of Crop Science Conference
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    • 2022.10a
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    • pp.217-217
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    • 2022
  • Pullulanase (PUL), a debranching enzyme, has been utilized in hydrolyzing the a-1,6 glucosidic linkages in starch, amylopectin, pullulan, as well as related oligosaccharides. It has also been indicated that PUL is a novel indicator of inherent RS (Resistant Starch) formation in rice. In this study, we performed haplotype analysis on 320 bred rice accessions, and additional 54 wild accessions were added to study genetic diversity along with other population-based analyses of the PUL gene. Through these investigations, we summarized a total of 10 functional (non-synonymous) SNPs from 7 different exons on chromosome 4. There were 10 haplotypes, of which only six haplotypes were functional, implicating different subpopulations. Diversity reduction was noticed in temperate japonica (0.0005) compared to the highest one (aus, 0.0154), illustrating their higher genetic differentiation by FST-value (0.926). The highest Tajima^ D value was observed in indica (3.6613), indicating PUL gene domestication signature under balancing selection, while the lowest Tajima's D value was found in temperate japonica (-2.2191) which might have undergone under positive selection and purified due to the excess of rare alleles. PCA, population structure, and phylogenetic analyses provide information on the genetic relatedness between and or among the cultivated subpopulations and the wild based on PUL genomic region.

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Cultural Identity that appear in Latin American Fashion: With a focus on the Mexican brands, Taller Flora and F$\acute{a}$brica Social

  • Kim, So-Ra
    • International Journal of Costume and Fashion
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    • v.13 no.1
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    • pp.61-79
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    • 2013
  • This study takes a look at the distinct and exclusive culture of Latin America, with a specific focus on Mexico, and attempts to understand its unique cultural identity by comparing, analyzing, and evaluating the characteristics of the Mexican fashion brands, Taller Flora and F$\acute{a}$brica Social, which are brands that have actively used the Latin American cultural identity in its designs. The research method was as follows: 1) performing literature research with specialty publications and thesis that dealt with the two brands 2) analyzing the contents of various articles from the Internet and interviews related to the brands. Thus, this research attempts to understand the characteristics of the fashion brands that use the cultural traits of Latin America in order to dissect its methods and find a way to apply it so that it can be used in different cultures, and in effect, lead to the advancement of the fashion industries, in general. Taller Flora and F$\acute{a}$brica Social are two brands that are able to stand out with a distinct identity by applying traditional native Latin American qualities in its products, as well as its products reflecting a respectful and balanced relationship between people and nature. The characteristics of the two brands are as follows: 1) showing the concept of "the coexistence of diversity" by expressing "the old and the new", "simplicity and flash", and "melding of the Western culture via colonialism and traditional cultures of the aboriginals and other diverse native cultures" 2) achieving "the recovery of the human dignity" by protecting the human rights of the native female artisans and building a network for equality 3) pursuing "free naturalism" by balancing the natural provision of nature and man in addition to promoting environmental protection and conservation of goods 4) becoming "the bridge between communication and exchange" by connecting the artisan, the designer and the consumers together, or the producer and the market, as well as the different cultures of markets from diverse countries.

A Study on the Several Important Clauses in ICC Model Distributorship Contract (국제판매점계약(國際販賣店契約)의 주요조항(主要條項) (ICC Model Distributorship Contract(Pub.518)을 중심(中心)으로))

  • Oh, Won-Suk
    • THE INTERNATIONAL COMMERCE & LAW REVIEW
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    • v.26
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    • pp.35-86
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    • 2005
  • International distributorship contract(IDC), as well as international agency contract is a type of contract which is most frequently used in international trade. But one of the main difficulties faced by parties of IDC is the lack of uniform rules for this type of contract. This means that both parties should be careful about each clause of the contract when they draw up it. The ICC prepared model form which incorporates the prevailing practice in international trade, and which aims at protecting and balancing the legitimate interests of both parties. This author examined the several important clauses in this model contract. The purpose of this examination is to help the contracting parties for better understanding and applying them in their actual contracting practice, which based on this model contract. When the supplier and the distributor execute their contract or use ICC Model Contract, they should be careful about the following points: First, some terminologies(like, "territory", "product", "competing products" and "exclusivity") should be clearly defined in their contract. Second, regarding the supplier's functions including "supplying products" and the distributor's responsibility including "undertaking not to compete", and "attaining guaranteed minimum targets", both parties should make clear about each party's right and obligation as well as one party's remedies available when other party makes breach of its obligation. Third, both parties should examine the relationship between the "exclusivity" or "sole" and competition law which is regarded as a mandatory rule in the territory. Forth, when both parties lay down "termination clause" in the contract, they should make clear about the indemnity in case of termination. Fifth, as there is not uniform law for the distributorship contract, it is inevitable to choose any local law as an applicable law in case of litigation. So both parties should keep in mind to insert arbitration clause to avoid the application of the local law. Besides, both parties should consider their individual and specific circumstances and try to reflect them in their contract by Annex I to XI attached to the end of model contract.

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RAiSE : A Graphical Process Modeling Language Providing Semantic Richness and Ease of Use (RAiSE :다양한 의미론과 사용의 용이성을 제공하는 그래픽 프로세스 모델링 언어)

  • Lee, Hyung-Won
    • The KIPS Transactions:PartD
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    • v.12D no.7 s.103
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    • pp.1007-1016
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    • 2005
  • A key issue for process language design is balancing the need for semantic richness with the need for ease of use. Most process modeling languages fail to satisfy above two conflicting aspects, which is an impediment to the widespread adoption of process modeling languages in the software industry despite of a variety of software process language studies. This paper describes a process modeling language RAiSE attempting to resolve such problem and presents the result of applying RAiSE to a well-known benchmark process, ISPW-6 software process example. RAiSE provides rigorous, yet clear semantics through combing essential features in various modeling paradigms and defining them in a well-structured graphical notation. Process models represented in RAiSE are interpreted and enacted by process engine implemented using CLiPS, a rule based expert system tool.

Transit Frequency Optimization with Variable Demand Considering Transfer Delay (환승지체 및 가변수요를 고려한 대중교통 운행빈도 모형 개발)

  • Yu, Gyeong-Sang;Kim, Dong-Gyu;Jeon, Gyeong-Su
    • Journal of Korean Society of Transportation
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    • v.27 no.6
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    • pp.147-156
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    • 2009
  • We present a methodology for modeling and solving the transit frequency design problem with variable demand. The problem is described as a bi-level model based on a non-cooperative Stackelberg game. The upper-level operator problem is formulated as a non-linear optimization model to minimize net cost, which includes operating cost, travel cost and revenue, with fleet size and frequency constraints. The lower-level user problem is formulated as a capacity-constrained stochastic user equilibrium assignment model with variable demand, considering transfer delay between transit lines. An efficient algorithm is also presented for solving the proposed model. The upper-level model is solved by a gradient projection method, and the lower-level model is solved by an existing iterative balancing method. An application of the proposed model and algorithm is presented using a small test network. The results of this application show that the proposed algorithm converges well to an optimal point. The methodology of this study is expected to contribute to form a theoretical basis for diagnosing the problems of current transit systems and for improving its operational efficiency to increase the demand as well as the level of service.

Concepts of Life and Health Definition in Traditional Korean Medicine (한의학적인 생명관의 특징과 건강의 정의)

  • Lee, Sun-Dong;Park, Hae-Mo
    • Journal of Society of Preventive Korean Medicine
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    • v.10 no.1
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    • pp.33-51
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    • 2006
  • With the reduction of contagious diseases throughout the world and prolonged life expectancy has lead into increase of habitual related diseases. Industrial development and better economic situation made people more concerned about their health. As primary illnesses are subdued in the past years, health care system and the public value prevention and well-being more than the treatment itself. Based on this trend, this study focused on the view of life from the perspective of Oriental medicine as it's peculiarities, regimen methods, and the definition of healthy life are evaluated. Following results were obtained: - View of life in Oriental medicine focused on two basic principles of interrelationship between the organs internally, inter-dependency with the natural environment and social surrounding externally as recognition and respect between the medium were valued. - Sustaining and maintaining good health in Oriental medicine are closely related to prenatally healthy pregnancy and fetation, as well as prenatal training. Postnatal maintenance includes accommodation to seasonal changes, adequate food intake, mind control, various regimen methods and avoidance of wrong doings. - Defining health includes body's internal condition and external influences, principles of essence, qi, spirit, and yin and yang, harmony and balance, and individuality. - To conclude, good health in Oriental medicine is defined as 'external adaptation to society and natural environment, and internal balancing of individual difference with accumulation of essence, nurturing and circulating qi, and every material around the body in harmony and balance."

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