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The recent fourth industrial revolution and the era of post-COVID-19 have ushered in a series of technologies including a 5G network and online systems, such as cloud computing technology. In other industries, extensive studies on cloud platforms utilizing such technologies were conducted. Although the cloud environment has taken on greater importance in the construction sector as well, it was used only for servers, failing to fully reflect the characteristics of the cloud system. In particular, compared to large architectural design firms, it is challenging for small to medium-sized design firms to establish a virtual cloud computing environment, which requires high capital investment. Targeting small to medium-sized architectural design firms in Korea, this study was conducted to introduce the VDI system, one of the cloud computing technologies that was recently used in other industries, to the BIM environment for initial application, operation, and management. Specifically, after an analysis was carried out to see if the VDI system utilized in other industries may resolve the hindrance faced with the BIM environment in the construction industry, the KBimVdi system was created based on an algorithm for estimating server scales by analyzing the VDI system suitable for the BIM work environment. This was followed by a validation of the KBimVdi system based on selected projects carried out by small to medium-sized architectural firms where BIM was used for design work.
Kyuhyup Lee; Joonghwan Shin; Soonwook Kwon; Chung-Suk Cho; Suwan Chung. BIM Environment Based Virtual Desktop Infrastructure (VDI) Resource Optimization System for Small to Medium-Sized Architectural Design Firms. Applied Sciences 2021, 11, 6160 .
AMA StyleKyuhyup Lee, Joonghwan Shin, Soonwook Kwon, Chung-Suk Cho, Suwan Chung. BIM Environment Based Virtual Desktop Infrastructure (VDI) Resource Optimization System for Small to Medium-Sized Architectural Design Firms. Applied Sciences. 2021; 11 (13):6160.
Chicago/Turabian StyleKyuhyup Lee; Joonghwan Shin; Soonwook Kwon; Chung-Suk Cho; Suwan Chung. 2021. "BIM Environment Based Virtual Desktop Infrastructure (VDI) Resource Optimization System for Small to Medium-Sized Architectural Design Firms." Applied Sciences 11, no. 13: 6160.
While industrial plant projects are becoming bigger, and global attention to the plant as a construct is increasing, space arrangement in plant projects is inefficient because of the complex structure of required facilities (e.g., complex MEP (mechanical, electrical, and plumbing) installations, specialized tools, etc.,). Furthermore, problems during installation, operation, and maintenance stages caused by inconsistencies between floor plans and actual layout are on the rise. Although some of these conflicts can be addressed through clash detection using BIM (building information modeling), quality BIM models are scarce, especially for existing industrial plants. This study proposes a way to address the complexities caused by changes during plant construction and securing space for the installation of equipment during the construction and lifecycle of built facilities. 3D cloud point data of space and equipment were collected using 3D laser scanning to conduct space matching. In processing the space matching, data were simplified by applying the 3D grid and by comparing the data, easier identification of the space for target equipment was accomplished. This study also proposed a pre-processing method based on sub-sampling that optimizes the point cloud data and verifies the processing speed and accuracy. Lastly, it finds free space for various equipment layouts required in industrial plant projects by space analysis, proposed algorithms, and processes for obtaining the coordinates of valid space for equipment arrangement. The proposed method of this study is expected to help solve the problems derived from arrangement and installation of new equipment in a complex plant site.
Donghyun Kim; Soonwook Kwon; Chung-Suk Cho; Borja GarcĂa De Soto; Daeyoon Moon. Automatic Space Analysis Using Laser Scanning and a 3D Grid: To Industrial Plant Facilities. Sustainability 2020, 12, 9087 .
AMA StyleDonghyun Kim, Soonwook Kwon, Chung-Suk Cho, Borja GarcĂa De Soto, Daeyoon Moon. Automatic Space Analysis Using Laser Scanning and a 3D Grid: To Industrial Plant Facilities. Sustainability. 2020; 12 (21):9087.
Chicago/Turabian StyleDonghyun Kim; Soonwook Kwon; Chung-Suk Cho; Borja GarcĂa De Soto; Daeyoon Moon. 2020. "Automatic Space Analysis Using Laser Scanning and a 3D Grid: To Industrial Plant Facilities." Sustainability 12, no. 21: 9087.
Developing and Implementing Guided Inquiry Modules in a Construction Materials CourseGuided inquiry is an alternative, research-based instructional approach which has receivedincreasing attention from engineering educators in the drive to incorporate active learning intoengineering education. PRIME modules are one example of guided inquiry instruction in theengineering disciplines. While modules on professional ethics have been developed and foundeffective, there is little research on the effectiveness of modules to improve student knowledge incore engineering topics.This paper describes a study of the effects of guided inquiry module instruction on undergraduateconstruction engineering students’ understanding of course concepts and attitudes toward moduleinstruction.Eighty-one students from two sections of the same Construction Materials engineering courseparticipated in the study. Both sections received guided inquiry module instruction (treatment)for three of the six course topics. Participants completed pre- and post-tests for each topic, exams(midterm and final), and a questionnaire to assess attitudes and perceptions.Results of the study show students perceived module instruction to be more effective than thetraditional lecture. Students across both sections indicated that they participated more duringmodule instruction, and that this approach was more effective in encouraging participation, andproviding opportunities for discussion, activities, and teamwork. Additionally, studentsperformed better on certain topic post-tests under the treatment condition.This study contributes to the growing research on the effectiveness of active instructionalapproaches in engineering education to improve student learning gains. Future research shouldconsider instructor teaching style and class composition in the design of experimentalcomparisons.
Chung-Suk Cho; David S. Cottrell; Candace Mazze; Sandra Loree Dika. Developing and Implementing Guided Inquiry Modules in a Construction Materials Course. 2012 ASEE Annual Conference & Exposition Proceedings 2020, 25.425.1 -25.425.10.
AMA StyleChung-Suk Cho, David S. Cottrell, Candace Mazze, Sandra Loree Dika. Developing and Implementing Guided Inquiry Modules in a Construction Materials Course. 2012 ASEE Annual Conference & Exposition Proceedings. 2020; ():25.425.1-25.425.10.
Chicago/Turabian StyleChung-Suk Cho; David S. Cottrell; Candace Mazze; Sandra Loree Dika. 2020. "Developing and Implementing Guided Inquiry Modules in a Construction Materials Course." 2012 ASEE Annual Conference & Exposition Proceedings , no. : 25.425.1-25.425.10.
Transforming and Integrating: Evolving Construction Materials & Methods to the Next LevelThis project will validate an active-based, student-focused methodology as a successful meansfor student achievement, engagement, and mastery of learning objectives and project outcomes.Outside the classroom, Habitat for Humanity will serve as a gateway to hands-on opportunitiesfor students with little or no experience in construction. When classroom instruction isaugmented with an out-of-class experience that provides a defining hands-on experience – formany perhaps their first – the classroom experience itself also takes on a new aura of reality andrelativity. Synergistically, the students emerging from this project will be more confident andbetter prepared for follow-on courses in the curriculum.The investigators for this project will conduct a highly structured assessment project to documentprogress in terms of the project objectives. The project evaluation will be based on both surveydata and objective assessment data collected before, during, and after each semester when theproject has been implemented in the classroom. A variety of tools will be employed at key targetof opportunity to solicit, capture, and analysis performance data. The collective sum of allapplicable assessment and evaluations for each course during either Phase I (Validation) orPhase III (Implementation) will collated in a form Independent Course Assessment Report(ICAR). Classroom performance will be tracked with objective data (graded homework,exercises, and exam problems) augmented with subjective data resulting from Pre- and Post-Surveys and interviews. Student data and perceptions will be complimented with input fromfaculty through surveys and interviews as well. The Habitat mission will also be deliberatelymeasured.All students enrolled in the course will complete surveys designed to identify their level ofknowledge and experience at the beginning of the semester. Commensurate with the Habitatprogram, students will be further assessed during interviews. Information collected willdocument past experience and current level of knowledge on applicable learning outcomes anddevelop profiles for the student populations.Faculty observers will document any Habitat related on-the-job training and instruction and thedemonstrated skills displayed by the students. These skills may include technical as well asfunctional expectations regarding oral communication and team performance. Further, during theclassroom instruction, periodic feedback will be gathered from the students concerning theirperceptions of the effectiveness of the project and the Habitat experience in promoting theproject objectives.Student participants will perform an after-action review through surveys as well as selected exitinterviews. The participants will be tracked collectively as they complete the course and assessedon their respective mastery of the course learning objectives in light of their job site excursion.Particularly during Phase I, their performance will be measured against course standards as wellas against the “control group” – that is, those students who did not participate in the Habitatmission or the guided program of study – to determine if any statistically significant differencesin outcome mastery can be determined and if so, whether it could be reasonably tied to theexperience gained through this project.
Chung-Suk Cho; David S. Cottrell; Candace E. Mazze. Research in Progress: Transforming and Integrating: Evolving Construction Materials & Methods to the Next Level. 2011 ASEE Annual Conference & Exposition Proceedings 2020, 22.1243.1 -22.1243.16.
AMA StyleChung-Suk Cho, David S. Cottrell, Candace E. Mazze. Research in Progress: Transforming and Integrating: Evolving Construction Materials & Methods to the Next Level. 2011 ASEE Annual Conference & Exposition Proceedings. 2020; ():22.1243.1-22.1243.16.
Chicago/Turabian StyleChung-Suk Cho; David S. Cottrell; Candace E. Mazze. 2020. "Research in Progress: Transforming and Integrating: Evolving Construction Materials & Methods to the Next Level." 2011 ASEE Annual Conference & Exposition Proceedings , no. : 22.1243.1-22.1243.16.
Enhancing Student Learning and Engagement in Construction Course using Service LearningService learning is considered a valuable approach to apply concepts from the higher educationclassroom in real world settings, and has become quite common in some disciplines. Engineeringeducators in the United States are making efforts to incorporate service learning activities andstudy their benefits for student learning and engagement. When classroom instruction isaugmented with an out-of-class experience that provides a defining hands-on experience – formany perhaps their first – the classroom experience itself also takes on a new aura of reality andrelativity. Synergistically, the students emerging from this learning experience will be moreconfident and better prepared for follow-on courses in the curriculum. Taking the basiccomponents of service learning approach, this paper validates an active-based, student-focusedmethodology as a successful means for student achievement, engagement, and mastery oflearning objectives and project outcomes.More specifically, this paper reports on the design and results of an one-year educationalresearch that utilized an engineering course, “Construction Materials”, to implement servicelearning by augmenting instruction with real-world hands-on construction experiences at localjob sites using Habitat for Humanity (HFH) projects. The “Construction Materials" is anintroductory course on behavior and physical properties of basic construction materials in CivilEngineering.Students’ perceptions and learning outcomes based on HFH experience were measured andanalyzed following the research questions that captured: perceived improvement in learningcourse materials while understanding the construction industry; level of interaction andteamwork between and among students, faculty, and peers; and student interpretation of thevalue of student learning for the course – greatest learning experiences and/or challenges.Overall, students reported positive perceptions of the service learning experience and itscontribution to their learning of course concepts. This paper describes the research background,application of service learning components, analysis and evaluation of service learning results,and findings from the research much in detail.
Chung-Suk Cho; Candace Mazze; Sandra Loree Dika; Gary Bruce Gehrig. Enhancing Student Learning and Engagement in Construction Course using Service Learning. 2013 ASEE Annual Conference & Exposition Proceedings 2020, 23.535.1 -23.535.9.
AMA StyleChung-Suk Cho, Candace Mazze, Sandra Loree Dika, Gary Bruce Gehrig. Enhancing Student Learning and Engagement in Construction Course using Service Learning. 2013 ASEE Annual Conference & Exposition Proceedings. 2020; ():23.535.1-23.535.9.
Chicago/Turabian StyleChung-Suk Cho; Candace Mazze; Sandra Loree Dika; Gary Bruce Gehrig. 2020. "Enhancing Student Learning and Engagement in Construction Course using Service Learning." 2013 ASEE Annual Conference & Exposition Proceedings , no. : 23.535.1-23.535.9.
Transforming Construction Materials Inside and Outside the Classroom The paper describes emerging results from an ongoing aggressive NSF funded researchproject involving a successful implementation of active-learning, student-focused educationalprotocols coupled with the deployment of student teams to Habitat for Humanity constructionjob sites. The course is a first year introductory course in construction materials that studies thehistory, physical properties, behavior, and application of basic construction materials. With two75-minute lectures and a 3-hour laboratory each week, this traditional course covers topicsincluding mineral aggregates, Portland cement concrete, masonry, wood, asphalt concrete,metals, plastics, and other materials. Despite the relative rigor of a comprehensive lab program,students still lack a good, first-hand experience employing the materials and the techniques orprocedures to produce a constructed facility. Under this innovative project, students inside theclassroom are engaged and compelled to take responsibility for their own learning. Outside theclassroom, Habitat for Humanity serves as a gateway to hands-on opportunities for students withlittle or no experience in construction. Beyond the education of the 125 students enrolled eachsemester, the project merit and impact extends outward to many targets. This paper reports on deliberate efforts to integrate research into education. Thisinnovative approach validates an active-based, student-focused methodology as a successfulmeans for student achievement, engagement, and mastery of learning objectives and projectoutcomes. Further, the paper will present evidence that when classroom instruction isaugmented with an out-of-class experience that provides a defining hands-on experience – formany perhaps their first – the classroom experience itself also takes on a new aura of reality andrelativity. Synergistically, the students emerging from this innovative project in educationalpedagogy appear more confident and better prepared for follow-on courses in the curriculum. This relatively low cost venture deliberately advances discovery and understanding of theutility of a newly emerging classroom teaching and learning paradigm coupled with integrationof a real world, hands-on opportunity to apply fundamentals of construction methods andmaterials. This paper will describe a project that promotes engaging teaching, trains faculty inactive-learning techniques, and gauges success through evaluating student learning. The paperwill report on the significance of this effort which extends to the University as well as to thecommunity. This project reports enhanced student learning stemming from the transformation ofthis course from a passive mechanism of lectures to an environment where students play a keyrole in mastering course objectives. Further, the Habitat operation gives the students a timelyopportunity to gain first-hand knowledge of materials and methods employed to produce aconstructed facility. Beyond the students, engaging in charitable endeavors such as Habitatbenefits the University by demonstrating its commitment to the surrounding community. This paper will also present future plans for expanding the program to other members ofthe academic community. A successful partnering program will demonstrate the portability ofthe pedagogy, initially with schools with similar curricula and courses, but certainly success on arelatively small scale should open routes to other disciplines within engineering technology aswell as STEM. Partnering supports dialogue, brainstorming, and collaboration on futureinnovations. Page 1 of 1
David S. Cottrell; Chung-Suk Cho. Renovating Education Inside and Outside of the Classroom: An Update on an Ongoing NSF Grant Featuring Innovative Initiatives to Revolutionize a First-Year Construction Materials Course. 2011 ASEE Annual Conference & Exposition Proceedings 2020, 22.1241.1 -22.1241.10.
AMA StyleDavid S. Cottrell, Chung-Suk Cho. Renovating Education Inside and Outside of the Classroom: An Update on an Ongoing NSF Grant Featuring Innovative Initiatives to Revolutionize a First-Year Construction Materials Course. 2011 ASEE Annual Conference & Exposition Proceedings. 2020; ():22.1241.1-22.1241.10.
Chicago/Turabian StyleDavid S. Cottrell; Chung-Suk Cho. 2020. "Renovating Education Inside and Outside of the Classroom: An Update on an Ongoing NSF Grant Featuring Innovative Initiatives to Revolutionize a First-Year Construction Materials Course." 2011 ASEE Annual Conference & Exposition Proceedings , no. : 22.1241.1-22.1241.10.
David Cottrell; Chung-Suk Cho; Na Lu; Robert Swan. Innovative Collaboration To Provide Hands On Educational Opportunities For Engineering Students: Integrating "Habitat For Humanity" Into A First Year Construction Materials Course. 2010 Annual Conference & Exposition Proceedings 2020, 15.741.1 -15.741.10.
AMA StyleDavid Cottrell, Chung-Suk Cho, Na Lu, Robert Swan. Innovative Collaboration To Provide Hands On Educational Opportunities For Engineering Students: Integrating "Habitat For Humanity" Into A First Year Construction Materials Course. 2010 Annual Conference & Exposition Proceedings. 2020; ():15.741.1-15.741.10.
Chicago/Turabian StyleDavid Cottrell; Chung-Suk Cho; Na Lu; Robert Swan. 2020. "Innovative Collaboration To Provide Hands On Educational Opportunities For Engineering Students: Integrating "Habitat For Humanity" Into A First Year Construction Materials Course." 2010 Annual Conference & Exposition Proceedings , no. : 15.741.1-15.741.10.
The Effect of Panopto on Academic Performance and Satisfaction of Traditional/Distance Education Students Abstract Distance Education (DE) is a growing alternative to classroom instruction. Distant programs provide unprecedented access to education to the many students that would otherwise be unable to enroll in classes, from working adults who cannot fit traditional classroom schedules into work and family responsibilities, to the more traditional students that cannot fit a class into a busy academic schedule (Mendenhall, 2007). However, for many participants, the appealing features of DE are offset by their perception of social isolation, particularly from their instructor. DE is often criticized because of the lack of face-to-face instructor-student interactions (Richardson and Swan, 2003). To address issues stated above, this research was conducted with the primary goal to test and validate the effectiveness of Panopto, a tool that provides a “virtual lecture” ambiance into online deliveries which lack the conventional aspects of classroom interaction. Panopto allows educators to capture, edit, and stream audio and video via the web and provides indexing and archiving capabilities as well. Captured materials can be searched, linked, and annotated through the software, and recorded materials can be embedded in Blackboard Vista. It gives students on- demand access to indexed lectures and course material, enabling them to experience or revisit entire lectures, or to focus on segments of their choice. Introduction This study was conducted to investigate whether Panopto adds value in enhancing the learning experience for students enrolled in an Engineering Technology curriculum. Panopto is a software-based application that captures lecture sessions as rich media recordings including video, audio, and screen capture components. Through an internal research grant, this study coincided with the initiative by the Department of Engineering Technology at a large southeastern university in performing a trial test of Panopto lecture capturing to validate how it can augment the effective delivery of course lectures. The particular engineering course selected for the study provided an excellent research context as it included both traditional, on-campus students as well as non-traditional, Distance Education (DE) students in the same section. This mixture of different student bases also enabled comparison of how Panopto was perceived by students within different academic settings as a medium to enhance learning experiences. As DE has become a growing alternative to traditional face-to-face classroom instruction, an increasing number of universities are offering more formal and informal courses to satisfy the growing demands of industry and the individual student.1 DE programs provide unprecedented access to education to many students who would otherwise be unable to attend classes. These include working adults who cannot fit traditional classroom schedules into work and family responsibilities, and the more traditional students who cannot fit a class into a busy academic schedule.2 Exploring DE methods of delivery to reach students at their place of work, their home,
Chung-Suk Cho; Stephen Kuyath. The Effect Of Panopto On Academic Performance And Satisfaction Of Traditional Distance Education Students. 2010 Annual Conference & Exposition Proceedings 2020, 15.1225.1 -15.1225.22.
AMA StyleChung-Suk Cho, Stephen Kuyath. The Effect Of Panopto On Academic Performance And Satisfaction Of Traditional Distance Education Students. 2010 Annual Conference & Exposition Proceedings. 2020; ():15.1225.1-15.1225.22.
Chicago/Turabian StyleChung-Suk Cho; Stephen Kuyath. 2020. "The Effect Of Panopto On Academic Performance And Satisfaction Of Traditional Distance Education Students." 2010 Annual Conference & Exposition Proceedings , no. : 15.1225.1-15.1225.22.
Selecting appropriate construction management method in construction projects based on owner’s project management capacity can be a make-or-break element. Given the accelerated change in the construction environment, the need for an efficient project management of public construction projects is ever more important, as is the need to select an appropriate construction management method. However, most public project owners find it difficult to select construction management method that perfectly coincides with their capacities or project characteristics since they lack information on the efficiencies of various construction management methods. Under this context, construction management method is usually selected for the sake of convenience or to comply with regulatory requirements. As such, this study aims to provide a basis for project owners to select the most appropriate construction management methods for the projects concerned by analyzing the efficiency of various methods currently applied to domestic public construction projects and also by comparing and analyzing the degree of satisfaction of project participants under each construction management method. In terms of allocated manpower and costs, the inspection supervision method and the construction supervision method incurred additional costs of 42% and 52%, respectively, compared to the direct supervision method. In addition, as for time spent processing tasks, other supervision methods took more time than that of the direct supervision method leading to the conclusion that the direct supervision method appeared to be the most efficient construction management method.
Sungkwon Woo; Chul-Ki Chang; Siwook Lee; Chung-Suk Cho. Comparison of Efficiency and Satisfaction Level on Different Construction Management Methods for Public Construction Projects in Korea. KSCE Journal of Civil Engineering 2019, 23, 2417 -2425.
AMA StyleSungkwon Woo, Chul-Ki Chang, Siwook Lee, Chung-Suk Cho. Comparison of Efficiency and Satisfaction Level on Different Construction Management Methods for Public Construction Projects in Korea. KSCE Journal of Civil Engineering. 2019; 23 (6):2417-2425.
Chicago/Turabian StyleSungkwon Woo; Chul-Ki Chang; Siwook Lee; Chung-Suk Cho. 2019. "Comparison of Efficiency and Satisfaction Level on Different Construction Management Methods for Public Construction Projects in Korea." KSCE Journal of Civil Engineering 23, no. 6: 2417-2425.
The competitive market realities in industrial environments demand timely completion of construction projects making time conservation a major concern for both owners and contractors. And the unpredictability of a construction project often leads to disputes followed by litigations between owners and contractors. Schedule compression is a common practice to achieve this timely completion of projects, however, can have detrimental consequences in terms of labor productivity and subsequent cost increase. Loss of productivity, however, is difficult to quantify especially when stemming from compressed schedule. Numerous researchers and trade associations have developed productivity factors to quantify the impact of schedule compression on labor productivity, but there has not been a method to quantitatively determine whether the project was impacted by schedule compression or not. This paper introduces a logistic regression impact model by analyzing the quantitative definition of schedule compression. The model will enable the user to determine if the schedule compression resulted in productivity loss or not. Based on the analysis of eight different factors, the logistic model will allow contractors and owners to determine the probability of a project being impacted by schedule compression.
Chul-Ki Chang; Awad S. Hanna; Sungkwon Woo; Chung-Suk Cho. Logistic Regression Modeling to Determine Projects impacted by Schedule Compression. KSCE Journal of Civil Engineering 2019, 23, 1493 -1500.
AMA StyleChul-Ki Chang, Awad S. Hanna, Sungkwon Woo, Chung-Suk Cho. Logistic Regression Modeling to Determine Projects impacted by Schedule Compression. KSCE Journal of Civil Engineering. 2019; 23 (4):1493-1500.
Chicago/Turabian StyleChul-Ki Chang; Awad S. Hanna; Sungkwon Woo; Chung-Suk Cho. 2019. "Logistic Regression Modeling to Determine Projects impacted by Schedule Compression." KSCE Journal of Civil Engineering 23, no. 4: 1493-1500.
Leadership development has become an import aspect of the UAE’s educational system. In recent years, UAE leaders have focused on the reform of higher education assessment, curriculum and administration with a view to encouraging Emirati students to contribute to the nation’s growth as national human capital, through leadership roles where they will be guided and educated driving the needs of the knowledge economy. In many courses, students are more knowledge recipients than producers; they are considered cognitively active whilst physically inactive where learning is considered a passive process. BUSS301, a third-year undergraduate course taught to engineering students has undergone major revisions influenced by student evaluations on application, relevance and assessment. The earlier syllabus entitled Corporate Leadership and Human Resource Management (more theoretical and examination driven) has evolved to a more recent Enquiry Based approach: Teaching and Learning Leadership by Simulation and Theory where students are driving their own learning through inquiry using a project-based learning (PBL) approach. Keywords: Project-based learning, engineering education, leadership, student-centred learning, constructivism, teambuilding, collaboration
Siobhan O’Sullivan; Chung-Suk Cho; Robert Pech; Young-Ji Byon. Leadership development of 21st century engineering millennial students in Khalifa University, United Arab Emirates; problem-based learning in action. New Trends and Issues Proceedings on Humanities and Social Sciences 2018, 5, 59 -70.
AMA StyleSiobhan O’Sullivan, Chung-Suk Cho, Robert Pech, Young-Ji Byon. Leadership development of 21st century engineering millennial students in Khalifa University, United Arab Emirates; problem-based learning in action. New Trends and Issues Proceedings on Humanities and Social Sciences. 2018; 5 (3):59-70.
Chicago/Turabian StyleSiobhan O’Sullivan; Chung-Suk Cho; Robert Pech; Young-Ji Byon. 2018. "Leadership development of 21st century engineering millennial students in Khalifa University, United Arab Emirates; problem-based learning in action." New Trends and Issues Proceedings on Humanities and Social Sciences 5, no. 3: 59-70.
For a particular section of a road network, there are multiple sources of quantitative and qualitative traffic information. Quantitative sensors are usually hardware-based, including loop detectors and GPS devices that produce numerical data. Qualitative sensors are usually processed data, including the traffic department’s websites and radio broadcasts that produce subjective categorical data based on hidden processes. Each sensor is characterized by a specific level of error and sampling frequency. It is a challenge to combine and utilize multiple sources of data for estimating real-time traffic conditions. By using Single-Constraint-At-A-Time (SCAAT) Kalman filters, this paper combines multiple data sources from a section of a highway. However, in real-life, true traffic conditions are unknown because all sensors have associated errors with them. A micro-simulation package is used in order to have access to the true traffic conditions of a simulated environment that has been calibrated for a particular road section in Toronto. Then, the performance of predictions made by the developed SCAAT filters are compared with the true traffic conditions under different sampling strategies with varying number of probes and varying sampling frequencies. SCAAT filters are found to be effective for fusing the data and estimating current traffic conditions.
Young-Ji Byon; Amer Shalaby; Baher Abdulhai; Chung-Suk Cho; Hwasoo Yeo; Samah El-Tantawy. Traffic Condition Monitoring with SCAAT Kalman Filter-based Data Fusion in Toronto, Canada. KSCE Journal of Civil Engineering 2018, 23, 810 -820.
AMA StyleYoung-Ji Byon, Amer Shalaby, Baher Abdulhai, Chung-Suk Cho, Hwasoo Yeo, Samah El-Tantawy. Traffic Condition Monitoring with SCAAT Kalman Filter-based Data Fusion in Toronto, Canada. KSCE Journal of Civil Engineering. 2018; 23 (2):810-820.
Chicago/Turabian StyleYoung-Ji Byon; Amer Shalaby; Baher Abdulhai; Chung-Suk Cho; Hwasoo Yeo; Samah El-Tantawy. 2018. "Traffic Condition Monitoring with SCAAT Kalman Filter-based Data Fusion in Toronto, Canada." KSCE Journal of Civil Engineering 23, no. 2: 810-820.
Accurate prediction of the construction duration is imperative to the reliable cash flow analysis during the project planning phase when feasibility analysis is carried out. However, lack of information and frequent changes that occur as a result of a negotiation process between the owner and the designer in defining the project scope make it difficult to compute real-time construction duration. Domestic and foreign models for calculating the construction durations cannot be readily applied to computation of construction duration for general office buildings in Korea specifically during the project planning phase as there is a limit in its applicability due to numerous restrictions. Moreover, there are no preceding studies suggesting different computational approaches to predict the entire construction duration for office buildings with the approximate construction duration concept during planning phase. Therefore, based on the collected performance data, this study proposes a multiple linear regression model that facilitates reliable prediction of approximate construction duration for office buildings in the project planning phase. The model will allow the owner and other stakeholders to predict the real-time construction duration using the basic information on office buildings and to assess the construction durations incorporating frequent changes during the project planning phase.
Dong-Jun Yeom; Hae-Mi Seo; Yoo-Jun Kim; Chung-Suk Cho; Youngsuk Kim. DEVELOPMENT OF AN APPROXIMATE CONSTRUCTION DURATION PREDICTION MODEL DURING THE PROJECT PLANNING PHASE FOR GENERAL OFFICE BUILDINGS. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 2018, 24, 238 -253.
AMA StyleDong-Jun Yeom, Hae-Mi Seo, Yoo-Jun Kim, Chung-Suk Cho, Youngsuk Kim. DEVELOPMENT OF AN APPROXIMATE CONSTRUCTION DURATION PREDICTION MODEL DURING THE PROJECT PLANNING PHASE FOR GENERAL OFFICE BUILDINGS. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT. 2018; 24 (3):238-253.
Chicago/Turabian StyleDong-Jun Yeom; Hae-Mi Seo; Yoo-Jun Kim; Chung-Suk Cho; Youngsuk Kim. 2018. "DEVELOPMENT OF AN APPROXIMATE CONSTRUCTION DURATION PREDICTION MODEL DURING THE PROJECT PLANNING PHASE FOR GENERAL OFFICE BUILDINGS." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 24, no. 3: 238-253.
While large construction sites have on-site loaders to handle heavy and large packages of bricks, small brick manufacturers employ a truck-mounted loader or sometimes deploy a loader truck to accompany normal brick delivery trucks to small construction sites lacking on-site loaders. It may be very challenging for small contractors to manage a sustainable delivery system that is both cost-effective and environmentally friendly. To address this issue, this paper proposes to solve a multi-trip vehicle loader routing problem by uniquely planning routes and schedules of several types of vehicles considering their synchronized operations at customer sites and multi trips. This paper also evaluates the sustainability of the developed model from both economic and environmental perspectives. Case studies based on small construction sites in the Middle East demonstrate applications of the proposed model to make the most economical plans for delivering bricks. Compared to the single-trip vehicle loader routing problem, the proposed model reduces, on average, 18.7% of the total delivery cost while increasing CO2 emission negligibly. The economic benefit is mainly achieved by reducing the required number of vehicles. Brick plant managers can use the proposed mathematical model to plan the most cost-effective delivery schedules sustainably while minimizing negative environmental effects.
Heungjo An; Young-Ji Byon; Chung-Suk Cho. Economic and Environmental Evaluation of a Brick Delivery System Based on Multi-Trip Vehicle Loader Routing Problem for Small Construction Sites. Sustainability 2018, 10, 1427 .
AMA StyleHeungjo An, Young-Ji Byon, Chung-Suk Cho. Economic and Environmental Evaluation of a Brick Delivery System Based on Multi-Trip Vehicle Loader Routing Problem for Small Construction Sites. Sustainability. 2018; 10 (5):1427.
Chicago/Turabian StyleHeungjo An; Young-Ji Byon; Chung-Suk Cho. 2018. "Economic and Environmental Evaluation of a Brick Delivery System Based on Multi-Trip Vehicle Loader Routing Problem for Small Construction Sites." Sustainability 10, no. 5: 1427.
The amount and market size of apartment complex exterior wall painting work continues to increase each year in South Korea. Nevertheless, there are difficulties with the supply and demand of human resources due to the high risks associated with conventional painting work. To resolve these issues, research and development has recently been conducted on a Gondola-type Exterior Wall Painting robot (GEWPro). The aims of this study were to develop a performance evaluation and life cycle cost (LCC) analysis model for a GEWPro and deduce its performance and economic efficiency through a case study. According to the results, the performance of the automated method was 16.8% higher than that of the conventional method, and the economic efficiency was also superior (benefit/cost ratio 6.39). These results show that the proposed performance evaluation and LCC analysis model can predict the productivity and economic efficiency of automated methods.
Dong-Jun Yeom; Eun-Ji Na; Mi-Young Lee; Yoo-Jun Kim; Young Suk Kim; Chung-Suk Cho. Performance Evaluation and Life Cycle Cost Analysis Model of a Gondola-Type Exterior Wall Painting Robot. Sustainability 2017, 9, 1809 .
AMA StyleDong-Jun Yeom, Eun-Ji Na, Mi-Young Lee, Yoo-Jun Kim, Young Suk Kim, Chung-Suk Cho. Performance Evaluation and Life Cycle Cost Analysis Model of a Gondola-Type Exterior Wall Painting Robot. Sustainability. 2017; 9 (10):1809.
Chicago/Turabian StyleDong-Jun Yeom; Eun-Ji Na; Mi-Young Lee; Yoo-Jun Kim; Young Suk Kim; Chung-Suk Cho. 2017. "Performance Evaluation and Life Cycle Cost Analysis Model of a Gondola-Type Exterior Wall Painting Robot." Sustainability 9, no. 10: 1809.
Traditionally, departments of transportation (DOTs) have dispatched probe vehicles with dedicated vehicles and drivers for monitoring traffic conditions. Emerging assisted GPS (AGPS) and accelerometer-equipped smartphones offer new sources of raw data that arise from voluntarily-traveling smartphone users provided that their modes of transportation can correctly be identified. By introducing additional raster map layers that indicate the availability of each mode, it is possible to enhance the accuracy of mode detection results. Even in its simplest form, an artificial neural network (ANN) excels at pattern recognition with a relatively short processing timeframe once it is properly trained, which is suitable for real-time mode identification purposes. Dubai is one of the major cities in the Middle East and offers unique environments, such as a high density of extremely high-rise buildings that may introduce multi-path errors with GPS signals. This paper develops real-time mode identification ANNs enhanced with proposed mode availability geographic information system (GIS) layers, firstly for a universal mode detection and, secondly for an auto mode detection for the particular intelligent transportation system (ITS) application of traffic monitoring, and compares the results with existing approaches. It is found that ANN-based real-time mode identification, enhanced by mode availability GIS layers, significantly outperforms the existing methods.
Young-Ji Byon; Jun Su Ha; Chung-Suk Cho; Tae-Yeon Kim; Chan Yeob Yeun. Real-Time Transportation Mode Identification Using Artificial Neural Networks Enhanced with Mode Availability Layers: A Case Study in Dubai. Applied Sciences 2017, 7, 923 .
AMA StyleYoung-Ji Byon, Jun Su Ha, Chung-Suk Cho, Tae-Yeon Kim, Chan Yeob Yeun. Real-Time Transportation Mode Identification Using Artificial Neural Networks Enhanced with Mode Availability Layers: A Case Study in Dubai. Applied Sciences. 2017; 7 (9):923.
Chicago/Turabian StyleYoung-Ji Byon; Jun Su Ha; Chung-Suk Cho; Tae-Yeon Kim; Chan Yeob Yeun. 2017. "Real-Time Transportation Mode Identification Using Artificial Neural Networks Enhanced with Mode Availability Layers: A Case Study in Dubai." Applied Sciences 7, no. 9: 923.
Lowest bidding is one of the bidding methods in which the party that bids at the lowest price is determined as the successful bidder. Although it was adopted for the purpose of strengthening and restructuring the construction industry while easing the regulations related to delivering public construction projects, the abolition of the lowest bidding system is under discussion as it is pointed out to be one of the major causes for deteriorating construction companies’ profitability. In order to overcome the limitations of inadequate reliability and representativeness of previous studies, this study has collected and analyzed numerous execution statements for public construction projects in order to understand the present condition related to whether a reasonable construction cost that is necessary for carrying out constructions is secured for the lowest bidding and what the problems are in execution of public construction projects. The average performance rate of projects ordered by lowest bidding was calculated at 104.8% through analysis of the execution statements for the public construction projects. In addition, this study analyzed the trend of change of performance rates in terms of contract amount, public owner types, and evaluation ranking of the contractor's construction capability.
Sungkwon Woo; Siwook Lee; Chung-Suk Cho; Sang Bin Kim. Study on the issues of the lowest bidding through the analysis of working budget ratio of Korean construction companies. KSCE Journal of Civil Engineering 2016, 21, 1587 -1594.
AMA StyleSungkwon Woo, Siwook Lee, Chung-Suk Cho, Sang Bin Kim. Study on the issues of the lowest bidding through the analysis of working budget ratio of Korean construction companies. KSCE Journal of Civil Engineering. 2016; 21 (5):1587-1594.
Chicago/Turabian StyleSungkwon Woo; Siwook Lee; Chung-Suk Cho; Sang Bin Kim. 2016. "Study on the issues of the lowest bidding through the analysis of working budget ratio of Korean construction companies." KSCE Journal of Civil Engineering 21, no. 5: 1587-1594.
The introduction of new OSHA cranes and derricks regulations in 2010 has been referenced by organizations involved in crane operations as being a significant milestone in reducing the number of crane accidents. This study investigates the impact of the new regulations on the frequency of crane accidents that result in fatalities and injuries while identifying crane related hazards posing significant safety risk during crane operations. Crane related accidents recorded between 2002 and 2012 were analyzed in detail to compare accident frequencies resulting in fatalities and injuries. Specifically, accidents were sorted by causes of crane accidents and types of crane failures grouped into two categories: accidents between 2002 to 2010 representing old crane regulations and accidents between 2011 and 2012 representing new regulations. The expectation was that crane accidents were significantly reduced after the introduction of new crane regulations. Detailed data analysis including chi-square test and proportional analysis were conducted on these two categories. Although no significant relationship was revealed between the frequency of crane accidents and the change in regulations, the proportional analysis showed decline in the frequency of certain types of accidents while revealing areas with proportional increase that require further attention for risk mitigation.
Chung-Suk Cho; Francis Boafo; Young-Ji Byon; Hyunjoo Kim. Impact analysis of the new OSHA cranes and derricks regulations on crane operation safety. KSCE Journal of Civil Engineering 2016, 21, 54 -66.
AMA StyleChung-Suk Cho, Francis Boafo, Young-Ji Byon, Hyunjoo Kim. Impact analysis of the new OSHA cranes and derricks regulations on crane operation safety. KSCE Journal of Civil Engineering. 2016; 21 (1):54-66.
Chicago/Turabian StyleChung-Suk Cho; Francis Boafo; Young-Ji Byon; Hyunjoo Kim. 2016. "Impact analysis of the new OSHA cranes and derricks regulations on crane operation safety." KSCE Journal of Civil Engineering 21, no. 1: 54-66.
Since the mega construction project, typically defined as a contract that exceed $1 billion, requires a large scale financial investment, there exists a high possibility of having a budget constraint and limitation during the project execution stage as well as the planning stage. The previous studies were limited to analyzing the resource-constrained scheduling problems in the case of a budget constraint during the initial stage with smaller-scale projects and have never presented comprehensive approaches for rescheduling during the implementation stage and calculating its overall cost impact, especially on mega projects. As such, this study aimed to examine the methodologies and limitations of the previous studies and to analyze solutions to solve their shortcomings, thereby presenting a better methodology to practically apply to mega projects. Specifically, this study assessed the heuristic method that is the most applicable to mega projects and applied it to a real mega project, thereby suggesting a new method of construction process adjustment. The suggested method is expected to be appropriately used as a solution to similar issues with no restrictions to the size of the project.
Sang-Mok An; Sungkwon Woo; Chung-Suk Cho; Siwook Lee. Development of budget-constrained rescheduling method in mega construction project. KSCE Journal of Civil Engineering 2016, 21, 85 -93.
AMA StyleSang-Mok An, Sungkwon Woo, Chung-Suk Cho, Siwook Lee. Development of budget-constrained rescheduling method in mega construction project. KSCE Journal of Civil Engineering. 2016; 21 (1):85-93.
Chicago/Turabian StyleSang-Mok An; Sungkwon Woo; Chung-Suk Cho; Siwook Lee. 2016. "Development of budget-constrained rescheduling method in mega construction project." KSCE Journal of Civil Engineering 21, no. 1: 85-93.
Hyunjoo Kim; Zhenhua Chen; Chung-Suk Cho; Hyounseok Moon; KiBum Ju; WonSik Choi. Integration of BIM and GIS: Highway Cut and Fill Earthwork Balancing. Computing in Civil Engineering 2015 2015, 468 -474.
AMA StyleHyunjoo Kim, Zhenhua Chen, Chung-Suk Cho, Hyounseok Moon, KiBum Ju, WonSik Choi. Integration of BIM and GIS: Highway Cut and Fill Earthwork Balancing. Computing in Civil Engineering 2015. 2015; ():468-474.
Chicago/Turabian StyleHyunjoo Kim; Zhenhua Chen; Chung-Suk Cho; Hyounseok Moon; KiBum Ju; WonSik Choi. 2015. "Integration of BIM and GIS: Highway Cut and Fill Earthwork Balancing." Computing in Civil Engineering 2015 , no. : 468-474.