Automatic Generation of Customized Checklists for Digital Construction Inspection

2021 ◽  
pp. 036119812199582
Author(s):  
Xin Xu ◽  
JungHo Jeon ◽  
Yuxi Zhang ◽  
Liu Yang ◽  
Hubo Cai
Keyword(s):  
Critical Role ◽  
The United States ◽  
Automatic Generation ◽  
Risk Level ◽  
Functional Requirements ◽  
Item Level ◽  
Inspection Process ◽  
Construction Inspection ◽  
Long Term Performance ◽  
Term Performance

Construction inspection plays a critical role to ensure the quality and long-term performance of infrastructure. The current construction inspection practice at state transportation agencies (STAs) in the United States, which requires inspectors to manually gather and personally interpret the construction requirements from standard specifications, is subjective, error-prone, and time-consuming. This paper presents an intelligent database approach to automatically generate customized checklists of construction requirements at the pay item level. The proposed approach consists of three components: (1) identification of the functional requirements by consulting with the end users, (2) development of a construction inspection knowledge model via ontology to guide the database design, and (3) devising mechanisms to automate the generation of customized construction checklists for the work under inspection with all the necessary details in relation to what, when, and how to check, as well as the risks and actions when noncompliance is encountered. Specifically, the following functions now can be performed within the new system: (1) automatic generation of a customized checklist at the pay item level; (2) access to a checklist display that aligns with the repetitive/cyclical nature of construction workflows; (3) navigation between cross-referenced check items; (4) subgroupings based on responsibility, risk level, and inspection frequency; and (5) real-time links to training materials such as photos, videos, textual documents, and websites. This newly developed tool is currently being implemented and is expected to greatly reduce the workload for inspectors and enhance the effectiveness of the construction inspection process.

Advanced Techniques for Establishing Long-Term Performance of Composite Repair Systems

2014 ◽  
Author(s):  
Chris Alexander
Keyword(s):  
The United States ◽  
Operating Conditions ◽  
Repair System ◽  
Composite Repair ◽  
Design Life ◽  
Repair Systems ◽  
Long Term Performance ◽  
Term Performance ◽  
Composite Repairs

Although composite materials are used to repair and reinforce a variety of anomalies in high pressure transmission gas and liquid pipelines, there continues to be widespread debate regarding what constitutes a long-term composite repair. The United States regulations require that composite repairs must be able to permanently restore the serviceability of the repaired pipeline, while in contrast the Canadian regulations take a more prescriptive approach by integrating the ASME PCC-2 and ISO 24817 composite repair standards along with a requirement for establishing a 50-year design life. In this paper the author provides a framework for what should be considered in qualifying a composite repair system for long-term performance by focusing on the critical technical aspects associated with a sound composite repair. The presentation includes a discussion on establishing an appropriate composite design stress using the existing standards, using full-scale testing to ensure that stresses in the repair do not exceed the designated composite design stresses, and guidance for operators in how to properly integrate their pipeline operating conditions to establish a design life. By implementing the recommendations presented in this paper, operators will be equipped with a resource for objectively evaluating the composite repair systems used to repair their pipeline systems.

Advanced Simulation Capability for Environmental Management (ASCEM)

2011 ◽  
Author(s):  
Paul Dixon ◽  
Mark Williamson ◽  
Mark Freshley ◽  
David Moulton ◽  
Ian Gorton ◽  
...  
Keyword(s):  
Environmental Management ◽  
The United States ◽  
Cementitious Materials ◽  
United States Department ◽  
Environmental Cleanup ◽  
Engineered Systems ◽  
The Cost ◽  
Contaminant Fate And Transport ◽  
Long Term Performance ◽  
Term Performance

The United States Department Energy (DOE) Office of Environmental Management (EM) determined that uniform application of advanced modeling in the subsurface could help reduce the cost and risks associated with its environmental cleanup mission. In response to this determination, the EM Office of Technology Innovation and Development (OTID), Groundwater and Soil Remediation (GW&S) began the program Advanced Simulation Capability for Environmental Management (ASCEM). ASCEM is a state-of-the-art scientific tool and approach for integrating data and scientific understanding to enable prediction of contaminant fate and transport in natural and engineered systems. This initiative supports the reduction of uncertainties and risks associated with EM’s environmental cleanup and closure programs through better understanding and quantifying the subsurface flow and contaminant transport behavior in complex geological systems. This involves the long-term performance of engineered components, including cementitious materials in nuclear waste disposal facilities that may be sources for future contamination of the subsurface. This paper describes the ASCEM tools and approach and the ASCEM programmatic accomplishments completed in 2010 including recent advances and technology transfer.

Updated Review of Stone Matrix Asphalt and Superpave® Projects

2003 ◽  
Vol 1832 (1) ◽  
pp. 217-223 ◽  
Author(s):  
Donald E. Watson
Keyword(s):  
Material Properties ◽  
The United States ◽  
Mix Design ◽  
Stone Matrix Asphalt ◽  
High Traffic Volume ◽  
Long Term Performance ◽  
Term Performance ◽  
Stone Matrix

Stone matrix asphalt (SMA) and Superpave® represent relatively new mix design technologies in the United States. Therefore, a condition survey was conducted of mixes that had been in service for several years to evaluate the long-term performance of SMA and Superpave projects. This study is a follow-up to a 1995 review of SMA projects and a 1998 review of Superpave projects. Both SMA and Superpave are acknowledged to be rut-resistant mixes, and this resistance was shown to be the case during this project review. However, a significant amount of cracking occurred early in the life of some of these mixtures. Overall, the SMA mixtures appeared to be more durable than the Superpave mixtures evaluated. The SMA mixtures have been in place about 2½ years longer than the Superpave mixtures, but the overall condition is about the same. Some of the primary conclusions from the survey are as follows: both SMA and Superpave mixtures were shown to be rut-resistant even when placed on facilities with high traffic volume; much of the observed cracking, especially load cracking, appeared to be more related to problems other than mix design or material properties; and SMA mixtures can be expected to last longer than Superpave mixtures before reaching the same condition level.

Commitment to Health Scale

2005 ◽  
Vol 13 (3) ◽  
pp. 219-229 ◽  
Author(s):  
Cynthia W. Kelly
Keyword(s):  
Health Behaviors ◽  
Stages Of Change ◽  
Internal Consistency Reliability ◽  
The United States ◽  
Decisional Balance ◽  
Validity And Reliability ◽  
Health Promoting Behaviors ◽  
Scale Scores ◽  
Long Term Performance ◽  
Term Performance

The Commitment to Health Scale (CHS) was developed to predict likelihood of clients being able to permanently adopt new health-promoting behaviors. Commitment is based on the association between starting new health behaviors and long-term performance of those behaviors. The CHS evolved from an examination of Prochaska and DiClemente’s Stages of Change Algorithm, Decisional Balance Scale, and Strong and Weak Principle (Velicer, Rossi, Prochaska, & DiClemente, 1996). Scale items were assessed by classical and Rasch measurement methods. The research was performed in three separate studies at various locations in the United States and included approximately 1,100 subjects. A new unidimensional variable was identified called Commitment to Health. Internal consistency reliability of the scale was .94 (Cronbach’s alpha). External validity and reliability were assessed based on expected and observed ordering and between known groups. Scale scores predicted self-reported health behaviors and body mass index.

scholarly journals The Effect Of Cross-Border And Domestic Acquisitions On Shareholder Wealth: Evidence From Brics Acquirers

2014 ◽  
Vol 8 (4) ◽  
pp. 34-45 ◽  
Author(s):  
Svetlana Grigorieva ◽  
R. Morkovin
Keyword(s):  
Firm Value ◽  
Developed Countries ◽  
Shareholder Wealth ◽  
Wealth Effects ◽  
Risk Level ◽  
Short Term ◽  
Cross Border ◽  
Long Term Performance ◽  
Term Performance

Svetlana A. Grigorieva National Research University The Higher School of Economics [email protected] The topic devoted to cross-border M&A performance has received wide attention in academic literature.Most existing studies examine wealth effects of international M&As in developed countries. Wecontribute to existing research by examining the market reaction to the announcements of M&As initiatedby companies from BRICS countries over 2000–2012. We assess the long-term performance ofM&A deals along with the short-term one and provide a copmarative analysis of company wealth gainsin cross-border and domestic M&As. Based on the sample of 117 cross-border deals and 247 domesticM&As we find that the stock market reacts favorably and statistically significant to the announcementsof domestic deals in the short run. Returns to foreign acquirer shareholders are also positive and statisticallysignificant. Comparing the effects of M&As on firm value in the short term for foreign anddomestic acquisitions we reveal that the latter outperform the cross-border M&As. Our analysis basedon the buy-and-hold abnormal return method shows the opposite result. We also find that the crossborderM&A deals increase the downside risk level of acquirers in the long term. According to ouranalysis, the key determinants of short- and long-term performance of M&A deals are the acquirer’sFCFF, percentage change in the acquiring country’s exchange rate against the target country currencyduring the acquisition year, and the level of international diversification of acquirers.

Doe Progress in Assessing the Long Term Performance of Waste Package Materials

1986 ◽  
Vol 84 ◽  
Author(s):  
A. Berusch ◽  
E. Gause
Keyword(s):  
Site Characterization ◽  
The United States ◽  
High Level Waste ◽  
Design Studies ◽  
Waste Package ◽  
License Application ◽  
High Level ◽  
Long Term Performance ◽  
Term Performance

Summary:Each of the projects has made significant progress toward the eventual operation of a repository for the disposal of high-level radioactive wastes in the United States. Although much has been accomplished, much remains to be done. For example, the Site Characterization Plans for BWIP and NNWSI are nearing completion to be followed by initiation of site characterization activities. The Site Characterization Plan for the selected salt site is scheduled for completion later in 1987. Waste package advanced conceptual design studies are currently scheduled to begin at each project before the end of FY 1987. These efforts will lead to selections of concepts to be detailed in the license application design phase. Compliance with the NRC criteria that require long-term waste package performance will be demonstrated by DOE by performing all of the aforementioned activities. In doing so, the DOE will also be assured that its plan for the safe disposal of high-level waste will be satisfactorily implemented.

Asphalt Trackbed Technology Development: The First 20 Years

2000 ◽  
Vol 1713 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Jerry G. Rose ◽  
E. Ray Brown ◽  
Monica L. Osborne
Keyword(s):  
Technology Development ◽  
The United States ◽  
Optimum Moisture Content ◽  
Performance Evaluations ◽  
Track Structure ◽  
Maintenance Costs ◽  
Rail Network ◽  
Long Term Performance ◽  
Term Performance

The evolution of hot-mix asphalt (HMA) trackbed technology is documented as presently practiced in the United States. Criteria used in selecting sites for and the attendant benefits of HMA trackbeds, based on long-term performance evaluations, are discussed. Prevailing practices for selecting ideal HMA mix parameters, trackbed section designs, and application procedures are described in detail. Primary attention is directed at the “underlayment” procedure in which the HMA serves as a premium subballast layer within the track structure to enhance the support, waterproofing, and confinement properties of the subballast. The roadbed or subgrade materials underlying the HMA mats maintain near-optimum moisture content. The HMA appears to undergo little if any weathering or deterioration in the trackbed environment. The resultant benefits are decreased maintenance costs, fewer slow orders, fewer operational interferences, and improved operational efficiency of the rail network overall.

Lessons Learned from the Yucca Mountain and WIPP Projects

2010 ◽  
Vol 73 ◽  
pp. 194-202 ◽  
Author(s):  
Evaristo J. Bonano ◽  
David S. Kessel ◽  
Lori J. Dotson
Keyword(s):  
System Analysis ◽  
The United States ◽  
Yucca Mountain ◽  
Lessons Learned ◽  
Total System ◽  
Waste Isolation Pilot Plant ◽  
License Application ◽  
Long Term Performance ◽  
Term Performance

For more than 30 years Sandia National Laboratories (SNL) has played a key role in the development and implementation of total system analyses of waste management systems in the United States. Two very important applications have been the total system analysis of long term performance that supported (1) the Compliance Certification Application (CCA) for the Waste Isolation Pilot Plant (WIPP) in 1996 and (2) the License Application (LA) for the Yucca Mountain (YM) Repository in 2008.

Selected In-Track Applications and Performances of Hot-Mix Asphalt Trackbeds

2013 ◽  
Author(s):  
Jerry G. Rose
Keyword(s):  
Impact Load ◽  
The United States ◽  
Factors Affecting ◽  
Support Materials ◽  
Maintenance And Rehabilitation ◽  
A Site ◽  
Engineering Practices ◽  
Long Term Performance ◽  
Term Performance

The use of a layer of asphalt within railway trackbeds has steadily grown since the early 1980s in the United States. Its primary use has been for maintenance and rehabilitation applications in existing tracks, particularly at special trackworks, to improve trackbed performance, and to a lesser extent for new trackbed applications where the projected long-term performance of the asphalt trackbed is anticipated to be economically justified. Normally the asphalt layer is 6 in. (150 mm) thick, placed on a prepared subgrade or granular subballast, and is subsequently topped with a layer of typical ballast. Accepted highway/railway construction practices are adhered to, including adequate preparation and compaction of the support layers. In addition, surface and sub-surface drainage aspects are evaluated on a site-specific basis and improvements are specified based on accepted engineering practices. This application does not deviate significantly from conventional all-granular trackbed designs, except the asphalt layer is substituted for a portion of the thickness of the granular subballast and ballast support materials. Described herein are 1) typical trackbed designs, 2) in-track applications, and 3) long-term performance evaluations for various types of major applications on several U.S. Class I railroads, namely NS, UP, CSX, and BNSF, and a limited number of Shortline railroads. Specifically addressed are rehabilitation applications for special trackworks — tunnel floors/approaches, wheel impact load detectors, bridge approaches, rail-highway crossings, turnouts, rail crossings, and rail crossovers — plus descriptions for a limited number of new double-tracking open-track installations. Brief descriptions are provided for international applications in six countries. Particular detail is given to factors affecting the economic justification for utilizing this technology based on long-term performances and historical evaluations of numerous installations. Details are provided relative to unique conditions and logistics related to the application of the layer of asphalt within the trackbed support for the special trackworks and selected open-track installations. Several specific installations are highlighted.

scholarly journals General trust scale: Validation in cross-cultural settings

2019 ◽  
Author(s):  
Dorota Jasielska ◽  
Radosław Rogoza ◽  
Anna Zajenkowska ◽  
Mary Bower Russa
Keyword(s):  
Convergent Validity ◽  
Scale Validation ◽  
Critical Role ◽  
The United States ◽  
Preliminary Evidence ◽  
Cross Cultural ◽  
Cultural Validity ◽  
General Trust ◽  
Item Level ◽  
Trust Scale

Abstract Trust plays a critical role in all aspects of social functioning. In attempting to better understand trust cross culturally, a valid tool is essential. We conducted two studies to investigate the cross-cultural validity and utility of the Generalized Trust Scale (Yamagishi and Yamagishi 1994). In Study 1, the structural and convergent validity of the GTS was examined in a large Polish sample (N = 727). Our findings provided important preliminary evidence for the validity of this scale in this sample. Subsequently, Study 2 compared responses to the GTS from two culturally different countries: Poland (N = 203) and the United States (N = 230). The structure of the GTS remained invariant across these two cultures, and the level of trust was comparable. As expected Americans showed higher levels of happiness than Poles, yet the relationship between trust and happiness was positive and similar in strength for both countries. Our data provide preliminary support for the use of the GTS in cross-cultural comparisons; however, consideration of data at the item level may also be relevant and cross culturally useful.

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