| 1. |
- Aaby, Anders, et al.
(författare)
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Does the Danish version of the Spinal Cord Lesion-related Coping Strategies Questionnaire measure what we think it measures? : A triangulated mixed-methods validation approach
- 2022
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Ingår i: Spinal Cord. - : SPRINGERNATURE. - 1362-4393 .- 1476-5624.
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Tidskriftsartikel (refereegranskat)abstract
- Study design: Triangulated mixed-methods validation study.Objectives: To validate the Danish version of the Spinal Cord Lesion-related Coping Strategies Questionnaire (SCL-CSQ).Setting: Community in Denmark.Methods: Participants were invited via a patient organization and its specialized hospital. Eligibility criteria were having a spinal cord injury (SCI), being 18 years or older, and able to understand and respond in Danish. Quantitative data were collected to determine internal consistency and criterion validity of the three subscales of SCL-CSQ, i.e., acceptance, fighting spirit, and social reliance. The Three-Step Test-Interview approach was employed to determine whether items measured what they were intended to measure (i.e., construct validity based on response processes).Results: The quantitative sample consisted of 107 participants, and the interview sample comprised 11 participants. The acceptance and fighting spirit subscales showed adequate internal consistency (Cronbach's alpha of 0.72 and 0.76 respectively) and satisfactory criterion validity (expected correlations with quality of life and depression). The social reliance subscale showed inadequate internal consistency (Cronbach's alpha of 0.58) and criterion validity. All fighting spirit items and all but one acceptance items were interpreted congruently by most participants. Conversely, two social reliance items were only interpreted congruently by 9 and 27%.Conclusion: The acceptance and fighting spirit subscales of the Danish version of the SCL-CSQ showed good psychometric properties, while the social reliance subscale showed serious issues and should be revised. Researchers and clinicians are urged to reflect on these findings when revising the SCL-CSQ or adapting it to other languages, cultural contexts, and rehabilitation settings.
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| 2. |
- Abadi, Imam, et al.
(författare)
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Design of Adaptive Neuro-Fuzzy Inference Control Based One-Axis Solar Tracker on Battery Charging System
- 2020
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Ingår i: E3S Web of Conferences. - : EDP Sciences. - 2267-1242. ; , s. 1-15
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Konferensbidrag (refereegranskat)abstract
- The photovoltaic (PV) panel can produce electrical energy that is very environmentally friendly and easy to use. The use of PV panels is suitable for supplying peak loads or at night using batteries as energy storage. However, the battery needs to manage for control, and the battery can last long. The solution to battery management problems is through research about the battery charging system. The DC-DC converter used is the Single Ended Primary Inductance Converter (SEPIC) type. Voltage Control of the battery charging using Adaptive Neuro-Fuzzy Inference System (ANFIS). In the simulation of bright conditions, ANFIS controls can track the charging point set point and obtain a voltage response with a rise time of 0.0028 s, a maximum overshoot of 0.027 %, a peak time of 0.008 s, and a settling time of 0.0193 s. When charging a solar tracker, PV battery gets a 0.25 % increase compared to a fixed PV panel. PV solar tracker can follow the direction of the sun's position. The irradiation value and maximum temperature affect the input voltage and input current that enters the converter.
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| 3. |
- Abadi, Imam, et al.
(författare)
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Performance Study of Maximum Power Point Tracking (MPPT) Based on Type-2 Fuzzy Logic Controller on Active Dual Axis Solar Tracker
- 2020
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Ingår i: E3S Web of Conferences. - : EDP Sciences. - 2267-1242. ; , s. 1-16
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Konferensbidrag (refereegranskat)abstract
- World energy consumption increases with time, so that occur an energy imbalance. Many breakthroughs have developed to utilize renewable energy. The photovoltaic system is one of the easy-to-use renewable energies. The power conversion from PV fixed is still low, so the PV system is designed using the active dual-axis solar tracker. The PV tracker position can be adjusted to change the sun position to get maximum efficiency. The active dual-axis solar tracker system is integrated with the maximum power point tracking (MPPT) algorithm to keep PV operating at a maximum power point even though input variations change. The active dual-axis solar tracker system integrated with the maximum power point tracking (MPPT) algorithm to keep PV operating at a maximum power point even though input variations change. Tracking test simulation had done by comparing the output power of a fixed PV system with the active dual-axis solar tracker. Type-2 fuzzy logic based MPPT successfully increased the average output power by 10.48 % with the highest increase of 17.48 % obtained at 15:00 West Indonesia Time (GMT+7). The difference in power from a fixed PV system with the active dual-axis solar tracker of 36.08 W is from the output power worth 206.3 to 242.4 W.
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| 6. |
- Abay, Zelalem, 1986
(författare)
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Essays on ESG disclosure, performance and assurance
- 2022
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- In this dissertation, economic implications of ESG disclosure, performance and assurance are examined in three essays. It is evident in the recent developments that the need for a sustainable and responsible investments is beyond discussion and becoming inevitable. An integral element required to make such investments is ESG information. The role and importance of ESG, especially to investment decisions, is attracting regulators’ interest in approaching the provision of ESG information through mandatory disclosure. Moreover, credit rating agencies are showing interest into the implications of ESG to credit risks. The purpose of this thesis is, therefore, to examine the reception of the mandatory EU ESG disclosure, and to examine the potential monitoring and signaling roles of third-party ESG assurance. The overall results of the thesis are three-fold. First, in examining the perception of investors towards EU directive on mandatory ESG disclosure, essay one shows a negative stock market reaction which indicates investors’ assessment of the directive as costly. The costs may include administrative and reporting costs of complying the mandate and potential proprietary and political costs following the reporting. Second, using sample firms from EU, essay two shows a higher ESG performance for firms that assure their ESG reports than firms that do not assure ESG reports. The results confirm the signaling role of an independent third-party assurance to differentiate between ESG performances. Firms with higher ESG performance has the incentive to use third-party ESG assurance to differentiate themselves from counterparts with an inferior ESG performance, otherwise both types of firms could be pooled together. Third, in line with monitoring theory of assurance and risk mitigation role of ESG to credit risks, essay three shows a mediated role of third-party ESG assurance on credit ratings. The results shows that the third-party ESG assurance indirectly leads to a reduced credit risk transferred through an enhanced ESG performance.
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| 7. |
- Abay, Zelalem
(författare)
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The signaling role of voluntary ESG assurance
- 2021
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Konferensbidrag (refereegranskat)abstract
- Using a sample of European firms, this study examines the signaling role of voluntary assurance of non-financial disclosures on their related performance, measured using environment, social, and governance (ESG) scores. Voluntary disclosures reduce information asymmetry and information risk, but such reductions are conditional on the verifiability of the disclosed information, thus requiring credibility. Given that skepticism in the reports is inevitable, credibility is paramount for differentiating firm performance. Credibility is enhanced by voluntarily purchasing assurance from an independent third party. This study argues that only firms with superior non-financial performance have an incentive to purchase assurance to differentiate themselves from poor-performing counterparts. The results reveal that firms with voluntary third-party assured reports have significantly higher ESG scores than those with unassured reports. This study offers new evidence on the signaling value of voluntary assurance on subsequent ESG scores.
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| 8. |
- Abay, Zelalem
(författare)
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The signalling role of voluntary ESG assurance
- 2022
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Ingår i: International Journal of Managerial and Financial Accounting. - : Inderscience Publishers. - 1753-6715 .- 1753-6723. ; :3, s. 265-294
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this study is to examine the role of independent third-party environment, social, and governance (ESG) assurance in signalling higher ESG performance. While testing the hypothesis, a liner regression is applied using data from Thomson Reuters ESG scores and global reporting initiative database from a sample of 645 unique European firms over the period of 2012-2017. Firms with third-party assurance are found to have a significantly higher ESG performance than firms with no assurance. This study offers new evidence on the signalling value of an independent third party ESG assurance in differentiating ESG performances and confirms the incentive that high performing firms could use to separate from their counterparts with poor performance in a separating equilibrium. Copyright © 2022 Inderscience Enterprises Ltd.
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| 9. |
- Abbas, Muhammad, et al.
(författare)
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Automated Reuse Recommendation of Product Line Assets Based on Natural Language Requirements
- 2020
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Ingår i: Lecture Notes in Computer Science. - Cham : Springer Science and Business Media Deutschland GmbH. - 9783030646936 ; , s. 173-189, s. 173-189, s. 173-189
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Konferensbidrag (refereegranskat)abstract
- Software product lines (SPLs) are based on reuse rationale to aid quick and quality delivery of complex products at scale. Deriving a new product from a product line requires reuse analysis to avoid redundancy and support a high degree of assets reuse. In this paper, we propose and evaluate automated support for recommending SPL assets that can be reused to realize new customer requirements. Using the existing customer requirements as input, the approach applies natural language processing and clustering to generate reuse recommendations for unseen customer requirements in new projects. The approach is evaluated both quantitatively and qualitatively in the railway industry. Results show that our approach can recommend reuse with 74% accuracy and 57.4% exact match. The evaluation further indicates that the recommendations are relevant to engineers and can support the product derivation and feasibility analysis phase of the projects. The results encourage further study on automated reuse analysis on other levels of abstractions.
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