scholarly journals Testing as-Built Quality of Free-Form Panels: Lessons Learned from a Case Study and Mock-up Panel Tests

2021 ◽  
Vol 11 (4) ◽  
pp. 1439
Author(s):  
Jong-Ho Ock
Keyword(s):  
Laser Scanning ◽  
Three Dimensional ◽  
Lessons Learned ◽  
Fiber Reinforced Concrete ◽  
Free Form ◽  
Geometric Difference ◽  
Curved Panel ◽  
Curved Panels

Constructing free-form buildings is very complex due to the difficulty in fabricating the curved façade. To install the façade, the complex geometric shapes of the façade need to be divided into panels. The panels developed are classified into three categories in terms of their curvatures, i.e., planar, single-curved, double-curved panels. The quality of the curved façade is determined by the geometric difference between as-built and as-designed panel shapes. Among the three types of curved panels, the double-curved panel is very difficult to form, showing greater quality discrepancy than the other two panel types. Ensuring the as-built quality of the curved façade is for contractors. The main objective of this study is to enhance small/mid-size contractors’ capacity of managing the as-built quality of the double-curved panel. To meet the study objectives, a case study of a small free-form building and empirical mock-up tests of curved panels were performed and beneficial lessons for the contractors were identified through the tests. Among diverse materials, aluminum and glass-fiber-reinforced concrete (GFRC) were utilized for the mock-up tests. Three-dimensional laser scanning technology was employed to foster the as-built data of the case study project and the mocked-up double-curved panels. The data superimposition method was used to measure the deviation between the as-designed and the as-built data of the case study.

scholarly journals Quality Assessment of Milling Pavement Surface Using 3D Line Laser Technology

2018 ◽  
Vol 2018 ◽  
pp. 1-9
Author(s):  
Bing Hui ◽  
Mu Guo ◽  
Xiaofang Liu
Keyword(s):  
Laser Scanning ◽  
Three Dimensional ◽  
Poor Quality ◽  
Surface Model ◽  
Premature Failure ◽  
Quality Work ◽  
Milled Surface ◽  
Surface Assessment

To ensure that a regular milled surface texture provides good bonding without residual distress, a new specification of milling surface assessment has been established for quantitatively evaluating the milled surface quality. This research explores the possibility of using three-dimensional (3D) laser scanning technology to develop an algorithm to obtain a milled surface model that can measure evaluating indicators, milling depth and texture depth, and identify poorly milled areas. A case study was conducted by using a laser scanning vehicular system to collect 3D continuous pavement transverse profiles data in a 500 m long segment of Highway S107. The results show that the proposed method is very promising and can measure the milling depth and texture depth to effectively and quantitatively differentiate between good- (milling depth between 47 mm and 53 mm and texture depth exceeding 2 mm) and poor-quality work. Moreover, the poorly milled areas such as those with residual distress and unmilled areas that will lead to premature failure can also be identified using the proposed method. The proposed method can effectively support remilling work and ensure the quality of the overlay pavement.

scholarly journals ACCURACY ASSESSMENT IN STRUCTURE FROM MOTION 3D RECONSTRUCTION FROM UAV-BORN IMAGES: THE INFLUENCE OF THE DATA PROCESSING METHODS

2015 ◽  
Vol XL-1/W4 ◽  
pp. 103-109 ◽  
Author(s):  
G. Caroti ◽  
I. Martínez-Espejo Zaragoza ◽  
A. Piemonte
Keyword(s):  
Data Processing ◽  
Structure From Motion ◽  
Laser Scanning ◽  
Accuracy Assessment ◽  
Three Dimensional ◽  
Evolution Of Structure ◽  
Textured Models ◽  
The Church ◽  
Data Processing Methods

The evolution of Structure from Motion (SfM) techniques and their integration with the established procedures of classic stereoscopic photogrammetric survey have provided a very effective tool for the production of three-dimensional textured models. Such models are not only aesthetically pleasing but can also contain metric information, the quality of which depends on both survey type and applied processing methodologies. An open research topic in this area refers to checking attainable accuracy levels. The knowledge of such accuracy is essential, especially in the integration of models obtained through SfM with other models derived from different sensors or methods (laser scanning, classic photogrammetry ...). Accuracy checks may be conducted by either comparing SfM models against a reference one or measuring the deviation of control points identified on models and measured with classic topographic instrumentation and methodologies. This paper presents an analysis of attainable accuracy levels, according to different approaches of survey and data processing. For this purpose, a survey of the Church of San Miniato in Marcianella (Pisa, Italy), has been used. The dataset is an integration of laser scanning with terrestrial and UAV-borne photogrammetric surveys; in addition, a high precision topographic network was established for the specific purpose. In particular, laser scanning has been used for the interior and the exterior of the church, with the exclusion of the roof, while UAVs have been used for the photogrammetric survey of both roof, with horizontal strips, and façade, with vertical strips.

scholarly journals Lessons Learned From an Intensive Writing Training Course for Applied Epidemiologists

2020 ◽  
Vol 135 (4) ◽  
pp. 428-434
Author(s):  
Jessica Arrazola ◽  
Malorie Polster ◽  
Paul Etkind ◽  
John S. Moran ◽  
Richard L. Vogt
Keyword(s):  
Public Health ◽  
Lessons Learned ◽  
Publishing Process ◽  
Writing Courses ◽  
Training Course ◽  
Public Health Professionals ◽  
Control And Prevention ◽  
Council Of State

Although writing is a valued public health competency, authors face a multitude of barriers (eg, lack of time, lack of mentorship, lack of appropriate instruction) to publication. Few writing courses for applied public health professionals have been documented. In 2017 and 2018, the Council of State and Territorial Epidemiologists and the Centers for Disease Control and Prevention partnered to implement a Morbidity and Mortality Weekly Report Intensive Writing Training course to improve the quality of submissions from applied epidemiologists working at health departments. The course included 3 webinars, expert mentorship from experienced authors, and a 2-day in-person session. As of April 2020, 39 epidemiologists had participated in the course. Twenty-four (62%) of the 39 epidemiologists had submitted manuscripts, 17 (71%) of which were published. The program’s evaluation demonstrates the value of mentorship and peer feedback during the publishing process, the importance of case study exercises, and the need to address structural challenges (eg, competing work responsibilities or supervisor support) in the work environment.

Galaxy's Data Quality Program

2011 ◽  
pp. 1-25
Author(s):  
Eric Infield ◽  
Laura Sebastian-Coleman
Keyword(s):  
Health Care ◽  
Data Quality ◽  
Data Warehouse ◽  
Information Quality ◽  
Lessons Learned ◽  
Statistical Process ◽  
Health Care Data ◽  
Quality Program

This paper is a case study of the data quality program implemented for Galaxy, a large health care data warehouse owned by UnitedHealth Group and operated by Ingenix. The paper presents an overview of the program’s goals and components. It focuses on the program’s metrics and includes examples of the practical application of statistical process control (SPC) for measuring and reporting on data quality. These measurements pertain directly to the quality of the data and have implications for the wider question of information quality. The paper provides examples of specific measures, the benefits gained in applying them in a data warehouse setting, and lessons learned in the process of implementing and evolving the program.

The Role of Web Services

2010 ◽  
pp. 342-357
Author(s):  
Pauline Ratnasingam
Keyword(s):  
Web Services ◽  
Balanced Scorecard ◽  
Small Businesses ◽  
Lessons Learned ◽  
Business Firm ◽  
The Balanced Scorecard ◽  
Exploratory Case Study

This chapter aims to examine the extent of Web services usage and quality, applying the balanced scorecard methodology in a small business firm as an exploratory case study. This chapter contributes to guidelines and lessons learned that will inform, educate, and promote small businesses on the importance of maintaining the quality of Web services.

scholarly journals A Study of Quality Assessment in Higher Education within the Context of Sustainable Development: A Case Study from Czech Republic

2020 ◽  
Vol 12 (11) ◽  
pp. 4769 ◽  
Author(s):  
David Vykydal ◽  
Martin Folta ◽  
Jaroslav Nenadál
Keyword(s):  
Higher Education ◽  
Sustainable Development ◽  
Quality Management ◽  
Management System ◽  
Quality Management System ◽  
Higher Education Institutions ◽  
Lessons Learned ◽  
Success Factor

Quality has become an increasingly important and critical success factor at higher education institutions, particularly universities. Numerous discussions have been held about education quality in the context of sustainable development. However, the quality of that education strongly depends on the overall quality of the management system which operates at schools. The principal aim of this article is to present the approaches to the quality management systems’ development and their assessment at universities, and share some lessons learned from this area of research. Some possibilities of the ISO 9001 standard’s implementation, as well as the application of excellence models as a response to community demands, will be discussed, especially in the context of the recently-introduced Act No. 111/1998 Coll on Higher Education Institutions, which requires quality assurance and quality evaluation. A case study from The VSB-Technical University of Ostrava shows approaches, results and effects of the quality management system implementation.

scholarly journals A flash-based thermal simulation of scanning paths in LPBF additive manufacturing

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kamel Ettaieb ◽  
Sylvain Lavernhe ◽  
Christophe Tournier
Keyword(s):  
High Performance ◽  
Laser Scanning ◽  
Thermal Field ◽  
Computational Cost ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
Content Type ◽  
Proposed Model ◽  
Scanning Path

Purpose This paper aims to propose an analytical thermal three-dimensional model that allows an efficient evaluation of the thermal effect of the laser-scanning path. During manufacturing by laser powder bed fusion (LPBF), the laser-scanning path influences the thermo-mechanical behavior of parts. Therefore, it is necessary to validate the path generation considering the thermal behavior induced by this process to improve the quality of parts. Design/methodology/approach The proposed model, based on the effect of successive thermal flashes along the scanning path, is calibrated and validated by comparison with thermal results obtained by FEM software and experimental measurements. A numerical investigation is performed to compare different scanning path strategies on the Ti6Al4V material with different stimulation parameters. Findings The simulation results confirm the effectiveness of the approach to simulate the thermal field to validate the scanning strategy. It suggests a change in the scale of simulation thanks to high-performance computing resources. Originality/value The flash-based approach is designed to ensure the quality of the simulated thermal field while minimizing the computational cost.

scholarly journals Accuracy assessment of terrestrial laser scanning and digital close range potogrammetry for 3D cultural heritage

2021 ◽  
Author(s):  
Abdullah Taha Ahmed Albourae
Keyword(s):  
Cultural Heritage ◽  
Laser Scanning ◽  
Reference Data ◽  
Accuracy Assessment ◽  
Terrestrial Laser Scanning ◽  
First Case ◽  
Culture Heritage ◽  
Close Range

There are various surveying techniques used in the field of cultural heritage documentation. Close Range Photogrammetry (CRP) and Terrestrial Laser Scanning (TLS) techniques have been widely used in 3D modeling applications. Various research studies integrate these techniques to enhance the quality of the data acquired. The main objective of this research is to assess the accuracy of TLS and CRP. The two methods are applied to two culture heritage case studies, which are located in the historic district in Jeddah, Saudi Arabia. The data obtained from both techniques is compared with data captured using traditional surveying techniques as reference data. The results show that TLS tends to be more accurate than CRP. In the first case study (Bab Makkah), CRP and TLS produced 0.044 m and 0.008 m overall RMS error, respectively; while CRP produced 0.025 m and TLS produced 0.021 m in the second case study (Bab Sharif).

scholarly journals A SOLUTION OF SUBORDINATE VERTICES FOR QUALITY CONNECTIONS OF EXTERNAL FREE-FORM CONCRETE PANELS

2018 ◽  
Vol 24 (5) ◽  
pp. 399-409
Author(s):  
Jeeyoung Lim ◽  
Seunghyun Son ◽  
Do Yeong Kim ◽  
Heni Fitriani ◽  
Sunkuk Kim
Keyword(s):  
Reinforced Concrete ◽  
Glass Fiber ◽  
Fiber Reinforced Concrete ◽  
Junction Point ◽  
Free Form ◽  
Fiber Reinforced ◽  
Aesthetic Quality ◽  
Concrete Panels ◽  
Glass Fiber Reinforced

3D-designs of free-form buildings are developed using a computer due to difficulty of shape implementation. When producing free-form concrete panel (FCP) using materials such as GFRC (glass fiber reinforced concrete), engineers or manufacturers should precisely calculate the offset value or geometry of each member at the junction point of three or more FCPs before it is constructed. However, it is difficult to calculate offset geometry easily and quickly, and no research has been conducted on this topic. Therefore, the objective of this paper is to develop a solution of subordinate vertices for quality connections of external free-form concrete panels. The developed mathematical solutions practically support the production of FCPs with precise installation to ensure aesthetic quality of the building. This paper academically contributes to the automatic creation of joint details of FCPs implemented by BIM.

IT Governance and Human Resources Management: A Framework for SMEs

2013 ◽  
Vol 4 (3) ◽  
pp. 40-57 ◽  
Author(s):  
Helena Garbarino-Alberti
Keyword(s):  
Human Resources ◽  
Simple Structure ◽  
Human Resources Management ◽  
It Governance ◽  
Lessons Learned ◽  
Resources Management ◽  
Material Resources ◽  
It Human Resources

Information Technology (IT) plays an important role in organizations, particularly in small and medium-sized enterprises (SMEs). These firms have a simple structure with less specialized tasks and tight human, financial and material resources, so it is particularly important to use an appropriate IT governance framework (ITG) to such enterprises. This paper shows the results of applying an ITG framework designed for SMEs in a case study focused on IT Human Resources (IT HR) and the lessons learned. Conclusions highlight the importance of the quality of IT HR along with the key role played by related enterprise policies.

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