Analysis of loudspeakers directivity diagram versus frequency and impact to sound systems effectiveness

Author(s):  
Stanislav Julianov Filipov ◽  
Snejana Georgieva Pleshkova
2013 ◽  
Vol 5 (2) ◽  
pp. 62-80
Author(s):  
Agnes Ashianti ◽  
Albertus Fani

The objective of this research is to examine the effect of task-technology fit, trust of accounting information systems, and effectiveness of accounting information systems on the individual performance at a supermarket in Tangerang city.  The samples in this study were employees of a supermarket in Tangerang city who used accounting information system in doing its job. The data used in this study is primary data through questionnaires. In data analysis techniques, this study test the reliability of the formula coefficient of Cronbach 's Alpha, validity test by means of correlation using the r counted and r table, test for normality using Kolmogorov-Smirnov test, the classical assumption, hypothesis testing multiple linear regression, t test, and F test. The results showed that the task-technology fit and trust of accounting information systems each have a significant effect on the individual performance, while the effectiveness of accounting information systems does not significantly influence the individual performance. Task-technology fit, trust of accounting information systems, and the effectiveness of accounting information systems have simultaneous significant effect on the individual performance. Keyword: Task-Technology Fit, Trust of Accounting Information Systems, Effectiveness of Accounting Information Systems, Individual Performance..


Complexity ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Luca Iandoli ◽  
Letizia Piantedosi ◽  
Alejandro Salado ◽  
Giuseppe Zollo

Elegance is often invoked as a characteristic of good design, but it cannot be pursued as a design objective because of the absence of actionable definitions that can be translated into design strategies and metrics. In this work, we analyze elegance in the context of systems engineering using a perspective that integrates visual art, Gestalt psychology, neuroscience, and complexity theory. In particular, we measure elegance as effective complexity and theorize that it can be achieved by a process of complexity resolution based on the adoption of eight visual heuristics. We present an empirical study in which a sample of systems engineers were asked to assess alternative representations of a same system and show that effective complexity is strongly correlated to perceived elegance and systems effectiveness. Our results are consistent with independent findings obtained in other fields including design and psychology of perception showing that good design must embed an effective level of complexity achievable through a mix of familiarity and novelty.


2013 ◽  
Vol 12 (1) ◽  
Author(s):  
Megan Littrell ◽  
John M Miller ◽  
Micky Ndhlovu ◽  
Busiku Hamainza ◽  
Moonga Hawela ◽  
...  

2021 ◽  
Vol 9 (2) ◽  
pp. 75-84
Author(s):  
A. V. Matveev ◽  
A. E. Krasheninnikov ◽  
E. A. Matveeva ◽  
B. K. Romanov

Good pharmacovigilance practices (GVP) of the Eurasian Economic Union (EAEU) were prepared based on the GVP of the European Medicines Agency that have been in force in the European Union (EU) since 2012. The EAEU GVP have been in force in the Russian Federation and the other EAEU member states since 2016. It is important to identify potential differences between the current regulations in order to harmonise requirements for the pharmacovigilance systems in the EU and EAEU. The aim of the study was to analyse and compare GVP requirements in the EU and EAEU. The analysis helped to identify differences in the structure and contents of GVP sections, the definitions of terms (EU GVP definitions are more detailed and supported by examples, subsections, and references to other documents). Moreover, supplements and annexes to the EU GVP contain figures, templates, examples, algorithms, and tables, which are missing in the EAEU GVP. Expert analysis of these differences as applied to assessment of the pharmacovigilance systems’ effectiveness, and practical activities of marketing authorisation holders, medicine developers, and regulatory authorities, demonstrated that the two GVPs are sufficiently harmonised and have very few differences. However, the number of differences between the documents increases, as changes are made to the EU GVP. A more comprehensive harmonisation of the EAEU GVP with the current version of the EU GVP will make it possible to develop and use uniform pharmacovigilance documents in the EU and EAEU, and will facilitate the introduction of EAEU medicines into the global pharmaceutical market.


10.28945/3891 ◽  
2017 ◽  
Vol 12 ◽  
pp. 309-335 ◽  
Author(s):  
Shamsudeen Ladan Shagari ◽  
Akilah Abdullah ◽  
Rafeah Mat Saat

Aim/Purpose: The purpose of this study is to investigate the interrelationship among the quality measures of information system success, including system quality, information, quality, and service quality, that eventually influence accounting information systems effectiveness. Background: It is generally believed that investment in an information system offers opportunities to organizations for business process efficiency and effectiveness. Despite huge investments in accounting information systems, banks in Nigeria have not realized the full potential benefits of using these systems because of persistent failures. Few studies have been conducted to address the problem. Methodology: A survey research design was used to collect data, and a total of 287 questionnaires were retrieved from respondents in the Nigerian banking sector. Contribution: This study contributes to the understanding of the most important antecedent factors of the quality measures, the interrelationship among the quality measures, and the influence of these measures on the accounting information systems effectiveness. Findings: The result of the study revealed that security, ease of use, and efficiency are key features of system quality, while the information quality dimension includes accuracy, timeliness, and completeness. The result of the study further revealed that information quality and system quality have significant influences on accounting information systems effectiveness. Recommendations for Practitioners: This study provides practitioners with important measures for evaluation of AIS effectiveness in the context of Nigerian banks. Recommendation for Researchers: Future researchers may build on the findings of current study to conduct fur-ther research in the area of AIS effectiveness in different contexts. Future Research: This study examines only three quality measures of Delone and Mclean model and antecedents of information and system quality measures, neglecting contingency factor. Therefore, future study should include other factors to the AIS effectiveness model to help in developing more specific theory in AIS domain.


Sign in / Sign up

Export Citation Format

Share Document