scholarly journals Sensitivity of Characterizing the Heat Loss Coefficient through On-Board Monitoring: A Case Study Analysis

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3322 ◽  
Author(s):  
Marieline Senave ◽  
Staf Roels ◽  
Stijn Verbeke ◽  
Evi Lambie ◽  
Dirk Saelens
Keyword(s):  
Sensitivity Analysis ◽  
Steady State ◽  
Data Analysis ◽  
Heat Loss ◽  
Input Data ◽  
Loss Coefficient ◽  
Wide Range ◽  
Board Monitoring ◽  
The Impact

Recently, there has been an increasing interest in the development of an approach to characterize the as-built heat loss coefficient (HLC) of buildings based on a combination of on-board monitoring (OBM) and data-driven modeling. OBM is hereby defined as the monitoring of the energy consumption and interior climate of in-use buildings via non-intrusive sensors. The main challenge faced by researchers is the identification of the required input data and the appropriate data analysis techniques to assess the HLC of specific building types, with a certain degree of accuracy and/or within a budget constraint. A wide range of characterization techniques can be imagined, going from simplified steady-state models applied to smart energy meter data, to advanced dynamic analysis models identified on full OBM data sets that are further enriched with geometric info, survey results, or on-site inspections. This paper evaluates the extent to which these techniques result in different HLC estimates. To this end, it performs a sensitivity analysis of the characterization outcome for a case study dwelling. Thirty-five unique input data packages are defined using a tree structure. Subsequently, four different data analysis methods are applied on these sets: the steady-state average, Linear Regression and Energy Signature method, and the dynamic AutoRegressive with eXogenous input model (ARX). In addition to the sensitivity analysis, the paper compares the HLC values determined via OBM characterization to the theoretically calculated value, and explores the factors contributing to the observed discrepancies. The results demonstrate that deviations up to 26.9% can occur on the characterized as-built HLC, depending on the amount of monitoring data and prior information used to establish the interior temperature of the dwelling. The approach used to represent the internal and solar heat gains also proves to have a significant influence on the HLC estimate. The impact of the selected input data is higher than that of the applied data analysis method.

Assessment of data analysis methods to identify the heat loss coefficient from on-board monitoring data

2020 ◽  
Vol 209 ◽  
pp. 109706 ◽  
Author(s):  
Marieline Senave ◽  
Staf Roels ◽  
Glenn Reynders ◽  
Stijn Verbeke ◽  
Dirk Saelens
Keyword(s):  
Data Analysis ◽  
Heat Loss ◽  
Loss Coefficient ◽  
Monitoring Data ◽  
Analysis Methods ◽  
Board Monitoring ◽  
Data Analysis Methods

scholarly journals Evaluating the efficacy of technical measures: a case study of selection device legislation in the UK Crangon crangon (brown shrimp) fishery

2008 ◽  
Vol 65 (2) ◽  
pp. 267-275 ◽  
Author(s):  
Tom L. Catchpole ◽  
Andrew S. Revill ◽  
James Innes ◽  
Sean Pascoe
Keyword(s):  
Brown Shrimp ◽  
Crangon Crangon ◽  
Shrimp Fishery ◽  
The North ◽  
Ex Post ◽  
Wide Range ◽  
The Uk ◽  
The Impact ◽  
Technical Measures

Abstract Catchpole, T. L., Revill, A. S., Innes, J., and Pascoe, S. 2008. Evaluating the efficacy of technical measures: a case study of selection device legislation in the UK Crangon crangon (brown shrimp) fishery. – ICES Journal of Marine Science, 65: 267–275. Bycatch reduction devices are being introduced into a wide range of fisheries, with shrimp and prawn fisheries particularly targeted owing to the heavy discarding common in these fisheries. Although studies are often undertaken to estimate the impact of a technical measure on the fishery before implementation, rarely have the impacts been assessed ex post. Here, the efficacy of the UK legislation pertaining to the use of sievenets in the North Sea Crangon crangon fishery is assessed. Three impacts were evaluated: on fisher behaviour (social), on the level of bycatch (biological), and on vessel profitability (economic). An apparent high level of compliance by skippers was identified despite a low level of enforcement. The estimated reduction in fleet productivity following the introduction of the legislation was 14%, equalling the mean loss of Crangon landings when using sievenets calculated from catch comparison trawls. Sievenets did reduce the unnecessary capture of unwanted marine organisms, but were least effective at reducing 0-group plaice, which make up the largest component of the bycatch. Clearly the legislation has had an effect in the desired direction, but it does not address sufficiently the bycatch issue in the Crangon fishery.

Professional Identity

2020 ◽  
pp. 227-246
Author(s):  
Aaron Ackerley
Keyword(s):  
Professional Identity ◽  
Cultural Changes ◽  
Newspaper Industry ◽  
Fourth Estate ◽  
Wide Range ◽  
Key Topics ◽  
British Press ◽  
The Impact ◽  
And Training

This chapter surveys changing notions of professional identity in the twentieth-century British press. The term ‘journalist’ is highly contested, covering a wide range of figures with different forms of experience and training as well as a wide range of roles within and beyond news organisations. Journalism has also lacked the clearly defined rules of practice and established pathways into the occupation evident in other careers that are classed as professions, such as medicine and law. By exploring key topics such as continuities from the nineteenth-century press, the rise of professionalism and journalists’ associations and unions, the myth of the ‘Fourth Estate’ and struggles over press regulation, and the impact of digitisation, this chapter explains how notions of professional identity within journalism have changed in response to wider social and cultural changes and changes within the newspaper industry itself. These topics are also explored in short case study, focused on the Guardian.

scholarly journals Towards the characterization of the heat loss coefficient via on-board monitoring: Physical interpretation of ARX model coefficients

2019 ◽  
Vol 195 ◽  
pp. 180-194 ◽  
Author(s):  
Marieline Senave ◽  
Glenn Reynders ◽  
Peder Bacher ◽  
Staf Roels ◽  
Stijn Verbeke ◽  
...  
Keyword(s):  
Heat Loss ◽  
Physical Interpretation ◽  
Loss Coefficient ◽  
Arx Model ◽  
Board Monitoring

Criticality Characteristics and Sensitivity Analysis of Fukushima Debris Beds Containing MCCI Products

2020 ◽  
Vol 6 (4) ◽  
Author(s):  
María Freiría López ◽  
Michael Buck ◽  
Jörg Starflinger
Keyword(s):  
Sensitivity Analysis ◽  
Nuclear Power ◽  
Realistic Model ◽  
Power Station ◽  
Wide Range ◽  
Core Meltdown ◽  
Erosion Factor ◽  
The Impact ◽  
Control Rods ◽  
Core Concrete

Abstract This study investigates the criticality characteristics of debris beds that may have been formed through the molten–core–concrete-interaction (MCCI) at the pedestal floor of the damaged reactors in Fukushima Daiichi Nuclear Power Station. These were modeled as UO2-concrete systems submerged in water. First, a conservative model was used to evaluate the impact that the presence of concrete has on the neutron multiplication factor (keff) of debris beds. The good moderation capacities of concrete were proved, and it was found that recriticality would be possible under the considered conservative assumptions. Second, a more realistic model was used to perform an uncertainty and sensitivity analysis of a wide range of debris parameters (debris porosity, core meltdown grade, debris size, debris composition, concrete erosion factor, etc.). In this case, the results indicate that the probability of a recriticality event is very remote. It was also found that the presence of boron (B4C) from the control rods within debris has by far the highest influence on keff.

scholarly journals Sensitivity analysis of the DEM resolution and effective parameters of runoff yield in the SWAT model: a case study

2019 ◽  
Vol 69 (1) ◽  
pp. 39-54 ◽  
Author(s):  
Mohammad Nazari-Sharabian ◽  
Masoud Taheriyoun ◽  
Moses Karakouzian
Keyword(s):  
Sensitivity Analysis ◽  
Assessment Tool ◽  
Swat Model ◽  
Computation Time ◽  
Effective Parameters ◽  
Digital Elevation ◽  
Elevation Model ◽  
The Impact ◽  
Reduce Computation Time

Abstract This study investigates the impact of different digital elevation model (DEM) resolutions on the topological attributes and simulated runoff, as well as the sensitivity of runoff parameters in the Mahabad Dam watershed in Iran. The watershed and streamlines were delineated in ArcGIS, and the hydrologic analyses were performed using the Soil and Water Assessment Tool (SWAT). The sensitivity analysis on runoff parameters was performed, using the Sequential Uncertainties FItting Ver. 2 algorithm, in the SWAT Calibration and Uncertainty Procedures (SWAT-CUP) program. The results indicated that the sensitivity of runoff parameters, watershed surface area, and elevations changed under different DEM resolutions. As the distribution of slopes changed using different DEMs, surface parameters were most affected. Furthermore, higher amounts of runoff were generated when DEMs with finer resolutions were implemented. In comparison with the observed value of 8 m3/s at the watershed outlet, the 12.5 m DEM showed more realistic results (6.77 m3/s). Comparatively, the 12.5 m DEM generated 0.74% and 2.73% more runoff compared with the 30 and 90 m DEMs, respectively. The findings of this study indicate that in order to reduce computation time, researchers may use DEMs with coarser resolutions at the expense of minor decreases in accuracy.

scholarly journals Impact probability under aleatory and epistemic uncertainties

2020 ◽  
Vol 132 (11-12) ◽  
Author(s):  
Chiara Tardioli ◽  
Davide Farnocchia ◽  
Massimiliano Vasile ◽  
Steve R. Chesley
Keyword(s):  
Risk Assessment ◽  
Orbital Evolution ◽  
Upper Bounds ◽  
Force Model ◽  
Statistical Distributions ◽  
Unknown Parameters ◽  
Wide Range ◽  
Parametric Families ◽  
The Impact

AbstractWe present an approach to estimate an upper bound for the impact probability of a potentially hazardous asteroid when part of the force model depends on unknown parameters whose statistical distribution needs to be assumed. As case study, we consider Apophis’ risk assessment for the 2036 and 2068 keyholes based on information available as of 2013. Within the framework of epistemic uncertainties, under the independence and non-correlation assumption, we assign parametric families of distributions to the physical properties of Apophis that define the Yarkovsky perturbation and in turn the future orbital evolution of the asteroid. We find $${\mathrm{IP}}\le 5\times 10^{-5}$$ IP ≤ 5 × 10 - 5 for the 2036 keyhole and $${\mathrm{IP}}\le 1.6\times 10^{-5}$$ IP ≤ 1.6 × 10 - 5 for the 2068 keyhole. These upper bounds are largely conservative choices due to the rather wide range of statistical distributions that we explored.

scholarly journals IFRS9 TRANSITION IMPACT ON THE QUALITY OF FINANCIAL REPORTING INFORMATION: A CASE STUDY OF YEMEN COMMERCIAL BANKS

2020 ◽  
pp. 54-63
Author(s):  
Mahdi Qasem Saeed, Saeed ◽  
D. A. Nikam
Keyword(s):  
Data Analysis ◽  
Statistical Methods ◽  
Financial Reporting ◽  
Commercial Banks ◽  
Positive Relationship ◽  
Descriptive Statistics ◽  
Ifrs 9 ◽  
The Impact

The purpose of this study is to know the IFRS 9 transition impact on the suitability and reliability of the quality of financial reporting information. A questionnaire was used in data collecting. Out of 92 questionnaires, only 85 were valid and suitable. The data analysis has been done by using SPSS and several statistical methods through descriptive statistics such as averages, standard deviations, and T-test. This study adds to the literature by knowing the IFRS 9 transition impact on the suitability and reliability of the quality of financial reporting information in the commercial banks of Yemen. The study reached that there is a positive relationship between the impact of the adoption of the IFRS9 on the suitability and reliability of the quality of financial reporting information in Yemen commercial banks. Finally, the study was concluded with some recommendations. KEYWORDS: International Standard Financial Reporting IFRS9, Quality of Financial Reporting Information, Suitability, and Reliability, commercial banks.

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