| 1. |
- Dinegdae, Yared, 1981-, et al.
(författare)
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Toward a Comprehensive Pavement Reliability Analysis Approach
- 2023
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Ingår i: Transportation Research Record. - : Sage Publications. - 0361-1981 .- 2169-4052. ; 2677:7, s. 680-692
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Tidskriftsartikel (refereegranskat)abstract
- Reliability has been incorporated in pavement design tools to account for input variability influence on predicted performance. As they are not based on a probabilistic method of uncertainty propagation, the reliability analysis methodologies that are currently implemented in pavement performance tools lack rigor and robustness. This paper investigates the potential of three reliability analysis methodologies for pavement application: the Pavement ME reliability analysis methodology, Monte Carlo simulation (MCS), and the first-order reliability method (FORM). The MCS and FORM involve a response surface method for the generation of a second-order surrogate model. The investigation was performed using inputs and performance data from accelerated pavement testing structures. Inputs that were identified as significant were characterized as random variables and their associated variability was established using measured structural and material properties. Pavement performance with respect to rutting was predicted using the ERAPave performance prediction tool, while MCS was used to generate the actual variability of the distress. The reliability analysis results have shown that a comprehensive reliability analysis methodology is required that effectively captures input variabilities and the error associated with surrogate models.
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| 2. |
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| 3. |
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| 4. |
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| 5. |
- Horii, Steven C., et al.
(författare)
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Unified Digital Image Display and Processing System
- 1981
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Ingår i: Proceedings of the Society of Photo-Optical Instrumentation Engineers. - : Society of Photo-Optical Instrumentation Engineers. - 0361-0748. ; 314, s. 340-346
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Tidskriftsartikel (refereegranskat)
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| 6. |
- Sulejmani, Pajtim, et al.
(författare)
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Moisture Sensitivity of Asphalt Mixtures using Cycling Pore Pressure Conditioning
- 2019
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Ingår i: Transportation Research Record. - : Sage Publications. - 0361-1981 .- 2169-4052. ; 2673:2, s. 294-303
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Tidskriftsartikel (refereegranskat)abstract
- One of the major causes of premature failure in asphalt pavements is moisture damage. Asphalt mixtures designed without considering climate impacts may suffer from durability problems caused by movement of water inside the asphalt mixture. Rolling traffic over wet pavement builds up pore pressure in the mixture, which will consequently accelerate deterioration. The objective of the study was to assess the moisture damage to asphalt concrete mixtures by means of complex modulus testing of dry and moisture-conditioned asphalt specimens with various mixture compositions. The asphalt mixtures were conditioned with the Moisture Induced Sensitivity Tester (MIST), which aims to replicate pore pressure in field conditions. The results showed a decline in stiffness modulus and a reduction in elastic properties after MIST conditioning. In addition, the results indicated that binder content and air void content had a significant influence on the reduction in stiffness. To capture the relationship between air void content, binder content, and the reduction in stiffness, a relationship was developed and validated with measurements on cores extracted in the field.
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| 7. |
- Zboinska, Malgorzata, 1981, et al.
(författare)
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Colored skins and vibrant hybrids : Manipulating visual perceptions of depth and form in double-curved architectural surfaces through informed use of color, transparency and light
- 2022
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Ingår i: Color Research and Application. - : Wiley. - 0361-2317 .- 1520-6378.
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Tidskriftsartikel (refereegranskat)abstract
- The past decades of research on color and light yielded vast knowledge supporting their informed use in architectural design. While there currently exists a rich body of knowledge and methods geared to affect the perception of depth and form in tiled, opaque architectural surfaces, not many such methods have been developed for double-curved, transparent, in-mass colored surfaces. The perception of depth and form in these surfaces relies on a complex blend of parameters, such as color combinations, illumination source, angle of viewing, location of shadows and reflections, material thickness and grade of transparency. To determine the visual effects caused by some of these parameters, experiments based on visual observations were carried out involving handcrafted, in-mass colored, undulant architectural surfaces. The insights from the experiments then served to develop four color strategies for architectural surface design harnessing the discovered effects in diverse ways. Through this, the study has sought first to observe and understand the effects of color and light in perceiving undulant surfaces, and second to highlight the potentials of harnessing these effects in the design of expressive architectural elements. The main insight from the study is that informed and deliberate application of color and light yields a wide range of potentially interesting perceptual effects in double-curved architectural surfaces, such as spatial filtering, gradient screening, vibrant massing and animate reshaping. Such effects, applied in an architectural context, can help to fulfill the demand for physical environmental enrichment in the digital era.
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| 8. |
- Schmidt, Manuela, 1978-, et al.
(författare)
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Cultural diversity in health care teams : A systematic integrative review and research agenda
- 2023
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Ingår i: Health Care Management Review. - : Wolters Kluwer. - 0361-6274 .- 1550-5030. ; 48:4, s. 311-322
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Forskningsöversikt (refereegranskat)abstract
- BACKGROUND: Although team-based work is deemed key to improving the quality of national health care systems, adverse events related to teamwork account for up to one third of all incidents. Health care teams are typically multiprofessional and diverse in many aspects, but cultural diversity is one of the most challenging.PURPOSES: The objective of this review is to systematically analyze the literature to better understand the impact of cultural diversity in health care teams on team processes as well as team and patient outcomes. This study also explores the conditions that enable or hinder team functioning.METHODOLOGY: Through a systematic integrative literature review, this study builds on the input-process-output-context framework. Multiple searches of the main databases led to identifying 43 relevant articles.FINDINGS: The results suggest that, when not proactively managed, cultural diversity may have a negative effect on team communication and integration, increasing team conflict and thereby negatively influencing team performance, team climate, and patient safety, both directly and indirectly. Yet, when managed properly and in the presence of engaged and culturally sensitive leadership, cultural training, and open and transparent procedures, cultural diversity in health care teams can be an asset to health care organizations. Analyzing and aggregating these findings into an integrative framework, our study identifies several themes and a research agenda for future studies on culturally diverse health care teams.PRACTICE IMPLICATIONS: Our findings suggest that culturally diverse health care teams experience a number of challenges, pointing to the need for action or structures that enable these teams to perform better, such as emphasizing learning and allowing team members time to get to know each other outside work.
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| 9. |
- Abenoza, Roberto, et al.
(författare)
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Individual, Travel, and Bus Stop Characteristics Influencing Travelers’ Safety Perceptions
- 2018
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Ingår i: TRR Journal of transportation research board. - : Sage Publications. - 0361-1981.
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Tidskriftsartikel (refereegranskat)abstract
- Ensuring safety during door-to-door public transport trips is a fundamental challenge to service providers as safety influences individuals’ mobility. Using reported safety perceptions of travelers waiting at six bus stops with different characteristics in Stockholm, this study investigates factors that have an impact on determining travelers’ perceived safety and crime perceptions. This is done by assessing the importance of real-time information provision and the environmental characteristics of bus stops during the day and at night for different types of crime, after controlling for travelers’ individual and trip characteristics, and their previous experiences of victimization. Interaction effects of age, gender, and travel frequency are also tested. The results suggest that bus shelter characteristics, natural surveillance, and trustworthy real-time information are the most important factors influencing safety and crime perceptions. Additionally, safety perceptions are strongly influenced by previous experiences of victimization. The effect of perceived feelings about crime and safety are found to be nuanced by age and gender. Unlike some common beliefs, travelers: (1) feel less worried about becoming a victim of crime at bus stops associated with high crime rates; (2) prefer opaque shelters at night; and (3) have higher safety perceptions when the stop is located in an area of mixed land use. The impact of a bus stop’s number of passers-by is found to be insignificant. No direct or indirect effects can be attributed to frequency of travel by bus, indicating that familiar places and routine behavior have noeffect on declared crime and safety perceptions.
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| 10. |
- Allström, Andreas, 1978-, et al.
(författare)
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Hybrid Approach for Short-Term Traffic State and Travel Time Prediction on Highways
- 2016
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Ingår i: Transportation Research Record. - Washington, DC, USA : The National Academies of Sciences, Engineering, and Medicine. - 0361-1981 .- 2169-4052. ; 2554, s. 60-68
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Tidskriftsartikel (refereegranskat)abstract
- Traffic management and traffic information are essential in urban areas and require reliable knowledge about the current and future traffic state. Parametric and nonparametric traffic state prediction techniques have previously been developed with different advantages and shortcomings. While nonparametric prediction has shown good results for predicting the traffic state during recurrent traffic conditions, parametric traffic state prediction can be used during nonrecurring traffic conditions, such as incidents and events. Hybrid approaches have previously been proposed; these approaches combine the two prediction paradigms by using nonparametric methods for predicting boundary conditions used in a parametric method. In this paper, parametric and nonparametric traffic state prediction techniques are instead combined through assimilation in an ensemble Kalman filter. For nonparametric prediction, a neural network method is adopted; the parametric prediction is carried out with a cell transmission model with velocity as state. The results show that the hybrid approach can improve travel time prediction of journeys planned to commence 15 to 30 min into the future, with a prediction horizon of up to 50 min ahead in time to allow the journey to be completed
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