Continuous monitoring of in-service performance of prestressed concrete continuous bridges with two strengthening measures

2022 ◽  
Vol 321 ◽  
pp. 126311
Author(s):  
Xiaodong Song ◽  
Xiaoyu Gong ◽  
Guangqi Li ◽  
Wen Xiong ◽  
C.S. Cai
Keyword(s):  
Prestressed Concrete ◽  
Continuous Monitoring ◽  
Service Performance

Comparative analysis for monitoring long-term behavior of box girder bridges in Colombia

2019 ◽  
Author(s):  
Luis F. Rincon ◽  
Álvaro Viviescas ◽  
Gustavo Chio ◽  
Edison Osorio ◽  
Carlos Riveros
Keyword(s):  
Comparative Analysis ◽  
Prestressed Concrete ◽  
Service Performance ◽  
Time Behavior ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Periodic Monitoring ◽  
Long Time ◽  
Long Term Behavior

<p>The use of prestressed concrete (PSC) box girder bridges built by segmentally balanced cast-in-place cantilevers has spread massively due to noticeable advantages over traditional. However, excessive deflections have been observed in 10-years old constructed bridges worldwide which have been designed based on old international code standards that underestimated rheological effects. To guarantee 100-year design life of bridges, it is necessary to have a periodic monitoring system that validates in-service performance. In Colombia there is a necessity to study in-service performance of this type of bridges after its construction, which is the main solution for structures with spans ranging from 80 m to 200 m, therefore this study seeks to propose a procedure to estimate the long-time behavior of box girder bridges in Colombia considering construction data scarcity. Therefore, altimetry data measured from a newly constructed bridge is collected, and the rheological effects of the structure are predicted using models previously developed and validated. Finally, a comparative analysis is carried out and guidelines are provided to propose a practical monitoring framework that guarantees adequate in-service bridge performance.</p>

Light-cured dental composites characterization by Electron Microscopy

1990 ◽  
Vol 48 (4) ◽  
pp. 428-429
Author(s):  
B. M. Culbertson ◽  
M. L. Devinev ◽  
E. C. Kao
Keyword(s):  
Electron Microscopy ◽  
Mechanical Analysis ◽  
Service Performance ◽  
Dental Composite ◽  
Dental Composites ◽  
Neat Resin ◽  
Scanning Calorimetry ◽  
Research Meeting ◽  
Formulation Variables

The service performance of current dental composite materials, such as anterior and posterior restoratives and/or veneer cements, needs to be improved. As part of a comprehensive effort to find ways to improve such materials, we have launched a broad spectrum study of the physicochemical and mechanical properties of photopolymerizable or visible light cured (VLC) dental composites. The commercially available VLC materials being studied are shown in Table 1. A generic or neat resin VLC system is also being characterized by SEM and TEM, to more fully understand formulation variables and their effects on properties.At a recent dental research meeting, we reported on the differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) characterization of the materials in Table 1. It was shown by DSC and DMA that the materials are substantially undercured by commonly used VLC techniques. Post curing in an oral cavity or a dry environment at 37 to 50°C for 7 or more hours substantially enhances the cure of the materials.

The multicompartment SlideReactor – a novel concept for continuous monitoring of co-cultured cells

2009 ◽  
Vol 47 (01) ◽  
Author(s):  
N Billecke ◽  
S Tröller ◽  
N Raschzok ◽  
MH Morgül ◽  
NN Kammer ◽  
...  
Keyword(s):  
Continuous Monitoring ◽  
Cultured Cells ◽  
Novel Concept

Remote diagnostics of vibrations of dynamic objects by Doppler microwave sensors

Metrologiya ◽  
2020 ◽  
pp. 25-42
Author(s):  
Dmitrii V. Khablov
Keyword(s):  
Intelligent Systems ◽  
Electromagnetic Waves ◽  
Continuous Monitoring ◽  
Phase Changes ◽  
Vibration Diagnostics ◽  
Remote Diagnostics ◽  
Active Vibration ◽  
Dynamic Objects ◽  
Microwave Sensors ◽  
Non Destructive

This paper describes a promising method for non-contact vibration diagnostics based on the use of Doppler microwave sensors. In this case, active irradiation of the object with electromagnetic waves and the allocation of phase changes using two-channel quadrature processing of the received reflected signal are used. The modes of further fine analysis of the resulting signal using spectral or wavelet transformations depending on the nature of the active vibration are considered. The advantages of this non-contact and remote vibration analysis method for the study of complex dynamic objects are described. The convenience of the method for machine learning and use in intelligent systems of non-destructive continuous monitoring of the state of these objects by vibration is noted.

We're So Bad It's Funny - Effects of Using Humour in the Marketing Communication of Low-Quality Service Providers

2020 ◽  
Vol 4 (2-3) ◽  
pp. 84-99
Author(s):  
Ilias Danatzis ◽  
Jana Möller ◽  
Christine Mathies
Keyword(s):  
Service Quality ◽  
Service Providers ◽  
Purchase Intentions ◽  
Service Performance ◽  
Superior Performance ◽  
Service Research ◽  
Marketing Communication ◽  
Quality Service ◽  
Customer Expectations ◽  
Service Outcomes

Low-quality service providers who are unable or unwilling to compete through superior performance increasingly use humour in their marketing communication to generate positive service outcomes. Yet it remains unclear whether using humour to communicate poor service quality is indeed effective. Based on an online experiment in the context of budget hotels, this study finds that using humour to deliberately communicate poor service quality leads to higher purchase intentions and service quality evaluations by reducing both technical and functional service quality expectations. Theoretically, this study extends humour and service research by providing first empirical evidence for the viability of using humour as an effective tool for leveraging customer expectations of service quality rather than improving service performance. Managerially, these insights highlight how reducing customer expectations is an alternative strategy for attracting new customers and for achieving superior quality evaluations.

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