• Title/Summary/Keyword: A cornerstone

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An expert system approach to the type selection of part feeders (부품공급장치 선정을 위한 전문가 시스템)

  • 조덕영;조형석
    • 제어로봇시스템학회:학술대회논문집
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    • 1989.10a
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    • pp.296-301
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    • 1989
  • As a cornerstone of assembly automation, the automatic part feeders are used to feed the various kind of the parts to the assembly workstation in the desired order and fashion. In this paper, EXPERT SYSTEM consisting of the data base for the feeding functions and part properties plus the rule base for the selection of feeder types is developed. The symbolic data of the part properties are used as basic factors in the selection rule of the suitable feeder types.

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Malar Relocation with Reverse-L Osteotomy and Autogenous Bone Graft

  • Yoon, Se Hoon;Jeong, Euicheol;Chung, Jee Hyeok
    • Archives of Craniofacial Surgery
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    • v.18 no.4
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    • pp.264-268
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    • 2017
  • The zygomaticomaxillary complex (ZMC) functions as a buttress for the face and is the cornerstone to a person's aesthetic appearance, by both setting the midfacial width and providing prominence to the cheek. Malar deficiency is often acquired by blunt injury incurred in a traumatic accident, resulting in ZMC fracture. A 48-year-old male patient presented a right ZMC fracture after contusion injury by a baseball. He only received conservative management and later he suffered discomfort during mouth opening at the moment of mastication, due to trismus involving the temporomandibular joint. In the current case, we describe a surgical technique, by which the malar body is shifted anteriorly and laterally after combined oblique-vertical osteotomy. The technique presented, eventually restored the former aesthetic position of the malar complex and symmetry, and, moreover, improved mastication function.

Development of an active gust generation mechanism on a wind tunnel for wind engineering and industrial aerodynamics applications

  • Haan, Fred L. Jr.;Sarkar, Partha P.;Spencer-Berger, Nicholas J.
    • Wind and Structures
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    • v.9 no.5
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    • pp.369-386
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    • 2006
  • A combination Aerodynamic/Atmospheric Boundary Layer (AABL) Wind and Gust Tunnel with a unique active gust generation capability has been developed for wind engineering and industrial aerodynamics applications. This facility is a cornerstone component of the Wind Simulation and Testing (WiST) Laboratory of the Department of Aerospace Engineering at Iowa State University (ISU). The AABL Wind and Gust tunnel is primarily a closed-circuit tunnel that can be also operated in open-return mode. It is designed to accommodate two test sections ($2.44m{\times}1.83m$ and $2.44m{\times}2.21m$) with a maximum wind speed capability of 53 m/s. The gust generator is capable of producing non-stationary gust magnitudes around 27% of the mean flow speed. This paper describes the motivation for developing this gust generator and the work related to its design and testing.

Traumatic Aortic Rupture Using Transesophageal Echocardiography - A Case - (경식도 초음파로 진단된 외상성 대동맥 파열[1예 보고])

  • 오중환
    • Journal of Chest Surgery
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    • v.25 no.3
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    • pp.335-340
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    • 1992
  • Truamatic aortic rupture is usually fatal if left untreated. Prompt diagnosis is the cornerstone of suscessful management. But the usual screening tests are non specific and the accuracy of computerized tomography is low, Aortography which is a time consuming procedure may result in false-positive interpretations and significant morbidity. Recently transesophageal echocardiography provides a rapid, effective and relatively safe means of evaluating the distal aortic arch and also affords the opportunity to evaluate the heart during the same study, which may be of benefit in cases of suspected cardiac injury. The experience with the traumatic aortic ruptured patient and a critical review of the literature suggests that transesophageal echocardiography is a useful technique for the diagnosis of ruptured aorta following blunt chest trauma.

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A Case Study on Collaborative Activities for Newly Installation of an Engine in a Helicopter (헬기 엔진의 신규장착을 위한 지원 사례 연구)

  • Ahn, Ieeki;Kim, Jae-Hwan;Sung, Oksuk
    • Journal of Aerospace System Engineering
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    • v.8 no.2
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    • pp.27-32
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    • 2014
  • From the flight safety and the performance point of views, a new engine installation impacts an helicopter development or upgrade program significantly. More than a close relationship between an aircraft manufacturer and an engine manufacturer is necessary for the best integration work from the program initiation phase. In this paper, technical cooperation between aircraft and engine companies, and technical supports by the engine manufacturer for the T700/701K engine during the Surion development program are summarized. The applications of official technical program documents, US Mil-spec, France airworthiness regulations as the standard of the engine installation work, and engineering activities at each phase such as contract, design and manufacturing, flight clearance, ground and flight tests are described. This paper would be a cornerstone for the future domestic helicopter development program.

Creation of High-Quality Abstractions in Software Engineering

  • Alexey Razumowsky
    • International Journal of Computer Science & Network Security
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    • v.23 no.7
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    • pp.193-201
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    • 2023
  • Abstraction is the cornerstone of ideal software engineering (SWE). This paper discusses a problem of forming reasonable generalizations, representations and descriptions in various software development processes through the prism of poor-quality (rash, unconsidered, uncertain and harmful) abstractions. To do this, emphasis is made on an induced strategic connection between the required abstraction and its compact specific formulation based on existing research and the author's introspective experience. A software aim point and characteristic preservation of the solution integrity is the subject of the best formulation and a program module or code associated with it. Moreover, a personal attitude expressed by personal interest, motivation and creativity, is proclaimed to be a fundamental factor in successful software development.

A Study on the Organic Concept of Frank Lloyd Wright's Architecture and Furniture Design (프랭크 로이드 라이트의 건축과 가구디자인의 유기성 연구)

  • Baik, Eun;Lee, Hyun-Jung
    • Journal of the Korea Furniture Society
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    • v.20 no.2
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    • pp.154-165
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    • 2009
  • Frank Lloyd Wright is an architect who established the concept of organic architecture and in his organic architectures, he applied studies on the inflow, growth and development of natural elements of shapes, pursued naturalism in the shapes and functions and connected them organically with each other. His furniture as appeared in his constructions shows geometric plasticity based on naturalism and achieves an integration of shapes, materials and functions while forming a space. The organic nature from the viewpoint of digital which is a new concept of the 21st century is greatly affecting construction and furniture designs. Designs having new organic concepts are emerging in furniture which is organically related with construction to achieve organic harmony with new plastic spaces. Therefore, studies on Wright are more significant as a cornerstone for new theories under development.

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The Boundaries of MM2: An Exploration of Equity Value Indeterminacy

  • Hyoung-Goo Kang
    • 한국벤처창업학회:학술대회논문집
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    • 2023.11a
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    • pp.69-71
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    • 2023
  • The Modigliani-Miller Proposition II (MM2) is a cornerstone in the field of corporate finance, positing that in a frictionless environment with perfect capital markets, the cost of equity capital is linearly related to a firm's leverage. This paper critically re-evaluates this proposition, particularly examining the determination of the cost and value of equity. We find that under specific circum-stances, especially when the value of a tax shield is influenced by endogenous variables, the cost and value of equity may be ambiguous. This calls into question the universal applicability of MM2. Our research offers new perspectives on the theoretical underpinnings of financial management and underscores the significance of situational factors in the practical application of these theories.

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Multiple Mixed Modes: Single-Channel Blind Image Separation

  • Tiantian Yin;Yina Guo;Ningning Zhang
    • Journal of Information Processing Systems
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    • v.19 no.6
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    • pp.858-869
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    • 2023
  • As one of the pivotal techniques of image restoration, single-channel blind source separation (SCBSS) is capable of converting a visual-only image into multi-source images. However, image degradation often results from multiple mixing methods. Therefore, this paper introduces an innovative SCBSS algorithm to effectively separate source images from a composite image in various mixed modes. The cornerstone of this approach is a novel triple generative adversarial network (TriGAN), designed based on dual learning principles. The TriGAN redefines the discriminator's function to optimize the separation process. Extensive experiments have demonstrated the algorithm's capability to distinctly separate source images from a composite image in diverse mixed modes and to facilitate effective image restoration. The effectiveness of the proposed method is quantitatively supported by achieving an average peak signal-to-noise ratio exceeding 30 dB, and the average structural similarity index surpassing 0.95 across multiple datasets.

A Study on the transition of Construction Equipment -Focused on the Excavator- (건설중장비 디자인의 변천과정에 관한 연구 -굴삭기를 중심으로-)

  • 도경찬
    • Archives of design research
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    • v.16 no.4
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    • pp.277-288
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    • 2003
  • By the needs for design, the leading construction equipment manufacturers have performed the product design newly setting up the design teams of late, but the actual level of designing is just as much as copying without systematic process, Therefore the various studies are needed to set up the differentiated design method targeted only for construction equipment and solving the current problems. In this paper, 1 am going to suggest a basic material as well as a cornerstone predicting future design trend in the construction equipment design field through the study of design transition.

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