• Title/Summary/Keyword: Schematic Design Phase

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Comparative Assessment of Usability of Web-storming System between Administrator and Designer Groups in Space Design Process (공간디자인 프로세스에서 관리자·실무자 그룹의 웹스토밍 시스템 활용성 비교평가)

  • Choi, Gil-Dong;Kim, Kwang-Myung
    • The Journal of the Korea Contents Association
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    • v.11 no.9
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    • pp.154-165
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    • 2011
  • Considering the online idea generation, or web-storming, system would be used differently by space designers depending on their job characteristics, the present study tested the usability of web-storming using a factor correlation table with a designer group in the field. Then, for analyses, the results were compared with the previous findings on the usability of web-storming in a design administrator group to suggest comprehensive measures applicable to web-storming. The questionnaire results were analysed following a process of observation-interpretation-application, and the space design process and web-storming function factors were also analysed based on a factor correlation table. The analyses found that the most correlated space design process in both administrator and designer groups was the schematic design phase, and that the correlation started to lower upon division of labour. The assessment phase was found significantly different between the designer group and the administrator group. The assessment phase showed the second highest correlation in the designer group. In terms of the aspects related to project operation, the correlation was found higher in the designer group. Based on the findings, new applicable measures to each phase of web-storming were derived and summed up to suggest how to take advantage of web-storming in the field.

Cost Prediction Models in the Early Stage of the Roadway Planning and Designbased on Limited Available Information (가용정보를 활용한 기획 및 설계초기 단계의 도로 공사비 예측모델)

  • Kwak, Soo-Nam;Kim, Du-Yon;Kim, Byoung-Il;Choi, Seok-Jin;Han, Seung-Heon
    • Korean Journal of Construction Engineering and Management
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    • v.10 no.4
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    • pp.87-100
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    • 2009
  • The quality of early cost estimates is critical to the feasibility analysis and budget allocation decisions for public capital projects. Various researches have been attempted to develop cost prediction models in the early stage of a construction project. However, existing studies are limited on its applicability to actual projects because they focus primarily on a specific phase as well as utilize restricted information while the amount of information collectable differs from one another along with the project stages. This research aims to develop two-staged cost estimation model for the schematic planning and preliminary design process of a construction projects, considering the available information of each phase. In the schematic planning stage where outlined information of a project is only available, the Case-Based Reasoning model is used for easy and rapid elicitation of a project cost based on the extensive database of more than 90 actual highway construction projects. Then, the representing quantity-based model is proposed for the preliminary design stage where more information on the quantities and unit costs are collectable based on the alternative routes and cross-sections of a highway project. Real case studies are used to demonstrate and validate the benefits of the proposed approach. Through the two-stage cost estimation system, users are able to hold a timely prospect to presume the final cost within the budge such that feasibility study as well as budget allocation decisions are made on effectively and competitively.

A Study of the Establishment of Small and Medium Sized Architectural Design Firm BIM Environment based on Virtual Desktop Infrastructure (가상 데스크톱 인프라(VDI) 기술을 활용한 중소규모 설계사의 BIM 사용자 별 데스크탑 자원 할당 전략에 관한 연구)

  • Lee, Kyuhyup;Shin, Joonghwan;Kwon, Soonwook;Park, Jaewoo
    • Korean Journal of Construction Engineering and Management
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    • v.17 no.5
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    • pp.78-88
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    • 2016
  • Recently BIM technology has been expanded for using in construction project. However its spread has been delayed than the initial expectations, due to the high-cost of BIM infrastructure development, the lack of regulations, the lack of process and so forth. In design phase, especially, collaboration based on BIM system has being a key factor for successful next generation building project. Through the analysis of current research trend about IT technologies, virtualization and BIM service, data exchange such as drawing, 3D model, object data, properties using cloud computing and virtual server system is defined as a most successful solution. In various industrial fields, cloud computing technology is utilized as a promising solution which can reduce time and cost of hardware infrastructure. Among the cloud computing technology, VDI is receiving a great deal of attention from it market as an essential part cloud computing. VDI enables to host multiple individual virtual machines by using hypervisor. It has an advantage to easy main device management. Therefore, this study implements a step-by-step user's DaaS by analyzing the desktop resource data of the workers from Pre-design phase to Schematic design, Design develop and Construction design phase. It also develops BIM environment based on test of BIM modeler and designers in architectural design firm. The goal of the study is to enable the cloud computing BIM server. It provides cost saving, high-performance quality of working environment and cooperation's convenience and high security when doing BIM work in small and medium sized architectural design firm.

Design of QPSK Demodulator Using CMOS BPSK Receiver and Reflection-Type Phase Shifter (CMOS 기반 BPSK 수신기와 반사형 위상 천이기를 이용한 QPSK 복조기 설계)

  • Moon, Seong-Mo;Park, Dong-Hoon;Yu, Jong-Won;Lee, Moon-Que
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.20 no.8
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    • pp.770-776
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    • 2009
  • We propose and demonstrate an I/Q demodulator using four-port BPSK demodulator base on additive mixing and reflection-type phase shifter using hybrid technique. Previously, the conventional I/Q demodulator base on multiplicative or additive mixing method divides I/Q signal path from mixer to parallel-to-serial converter. In this paper, we propose new I/Q demodulator without dividing I/Q baseband signal path. The proposed schematic requires half size in implementation and half power consumption in baseband path compared with the conventional receiver. Also, the proposed receiver eliminates parallel-to-serial converter after data decoding. The proposed circuit has been successfully demodulated a QPSK signal with the L-band carrier frequency and 20 Mbps data rate.

DDS를 이용한 중단파대 국ㆍ영문용 DSC/NBDP 개발에 관한 연구

  • 유형열;김기문
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.3 no.4
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    • pp.805-817
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    • 1999
  • In this paper, the needs for introduction and adoption of MㆍHF DSC/NBDP system and for developments of its circuits and call sequences for use in the maritime mobile services for small-ships, leisure-ships and fishing ships are analyzed, discussed. Also design and implement for MㆍHF(1.6-4MHz) DSC/NBDP system is discussed. Most of casualties have been arisen from small-ships and fishing ships during last 5 years. So, the SAR schematic plans should been prepared to prevent casualties and facilitate the activities of SAR for those ships. DSC/NBDP for MㆍHF system is able to fulfill the roles of efficient SAR communication functions, and to advance the SAR system to small ships and fishing ships. This study is focused on the techniques of processing the DSC call sequences and the ARQ sequences of NBDP system. Especially ARQ sequences are expanded into processing of Korean letters, designed the call sequences and code conversion algorithm for Korean-code. It will be evaluated the availability of Korean-NBDP system. In designing the Transmitting circuits and Receiving circuits, for the carrier generation, DDS(Direct Digital Synthesizer) is used in stead of the Phase Locked Loop and frequency conversion by the mixer, BPF. And PSK modulation signals are directly generated by the controls of DDS, which show the characteristics of Spurious Free Dynamic Range are below -62dBc. Also, the monolithic U subsystem IC which provides various functional components, AD608 is used for designing the receiving circuitsㆍAnd the algorithm of Phasing methode for FSK demodulation are devised to process IF frequency 455kHz in the IF circuits.

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Cost Estimating for Public Facilities at Early Stage Using Functional Area Cost - Focusing on Army Barracks - (공공건축물 계획단계에서의 용도별 공사비 예측에 관한 연구 - 육군 병영생활관을 대상으로 -)

  • Lee, Hyun-Soo;Jung, Myung-Jun;Park, Moon-Seo;Son, Bo-Sik
    • Korean Journal of Construction Engineering and Management
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    • v.11 no.6
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    • pp.3-13
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    • 2010
  • The purpose of this research is to develop a conceptual model that establishes a new approach for functional area cost estimating in the schematic design phase. A cost estimating model should consider not only the estimate accuracy, but also the flexibility to the design alternatives and user-oriented serviceability. Therefore, this research uses the method that classifies various facilities of a building according to its functions by analyzing historical data. After setting the functional area as cost parameter, a formula which can estimate functional area cost is derived from statistical analysis. Finally, to validate the proposed conceptual model, it is applied to historical data of a military barrack project. It enables customized space planning reflecting client's needs and compares the cost of various design alternatives as well as improves estimate accuracy.