scholarly journals Evaluating the Performance of Speaker Recognition Solutions in E-Commerce Applications

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6231
Author(s):  
Olja Krčadinac ◽  
Uroš Šošević ◽  
Dušan Starčević
Keyword(s):  
Open Source ◽  
Speaker Recognition ◽  
Voice Recognition ◽  
Multimodal Biometrics ◽  
Research Focus ◽  
Identity Verification ◽  
Linear Discriminant ◽  
Main Research ◽  
Different Types ◽  
Independent Tasks

Two important tasks in many e-commerce applications are identity verification of the user accessing the system and determining the level of rights that the user has for accessing and manipulating system’s resources. The performance of these tasks is directly dependent on the certainty of establishing the identity of the user. The main research focus of this paper is user identity verification approach based on voice recognition techniques. The paper presents research results connected to the usage of open-source speaker recognition technologies in e-commerce applications with an emphasis on evaluating the performance of the algorithms they use. Four open-source speaker recognition solutions (SPEAR, MARF, ALIZE, and HTK) have been evaluated in cases of mismatched conditions during training and recognition phases. In practice, mismatched conditions are influenced by various lengths of spoken sentences, different types of recording devices, and the usage of different languages in training and recognition phases. All tests conducted in this research were performed in laboratory conditions using the specially designed framework for multimodal biometrics. The obtained results show consistency with the findings of recent research which proves that i-vectors and solutions based on probabilistic linear discriminant analysis (PLDA) continue to be the dominant speaker recognition approaches for text-independent tasks.

scholarly journals Modified Nanoclays/Straw Fillers as Functional Additives of Natural Rubber Biocomposites

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 799
Author(s):  
Justyna Miedzianowska ◽  
Marcin Masłowski ◽  
Przemysław Rybiński ◽  
Krzysztof Strzelec
Keyword(s):  
Natural Rubber ◽  
Raw Materials ◽  
Research Work ◽  
Damping Properties ◽  
Main Research ◽  
Functional Additives ◽  
Different Types ◽  
Elastomeric Materials ◽  
Research Goal ◽  
The Impact

Increasingly, raw materials of natural origin are used as fillers in polymer composites. Such biocomposites have satisfactory properties. To ensure above-average functional properties, modifications of biofillers with other materials are also used. The presented research work aimed to produce and characterize elastomeric materials with a straw-based filler and four different types of montmorillonite. The main research goal was to obtain improved functional parameters of vulcanizates based on natural rubber. A series of composites filled with straw and certain types of modified and unmodified nano-clays in various ratios and amounts were prepared. Then, they were subjected to a series of tests to assess the impact of the hybrids used on the final product. It has been shown that the addition of optimal amounts of biofillers can, inter alia, increase the tensile strength of the composite, improve damping properties, extend the burning time of the material and affect the course of vulcanization or cross-linking density.

scholarly journals The profiling of university of Ljubljana students according to their motives for exercise participation

2017 ◽  
Vol 56 (2) ◽  
pp. 107-114 ◽  
Author(s):  
Katja Cerar ◽  
Miran Kondrič ◽  
Joško Sindik
Keyword(s):  
Physical Activity ◽  
Additional Data ◽  
Personal Data ◽  
Male Students ◽  
Main Research ◽  
Exercise Participation ◽  
Different Types ◽  
Participation Motives ◽  
The University ◽  
Practical Implications

Abstract Introduction The main research objective is the analysis of the grouping of the students of the University of Ljubljana, with respect to the intensity of different types of exercise participation motives, their gender, discipline and year of study, level of physical activity, status of physical education class, organization of physical activities during study, and place of residence. Methods Data were collected using personal data sheets during enrolling students at the University of Ljubljana. Students completed The Exercise Motivations Inventory (EMI-2), with additional data about sociodemographic parameters. Results The results reveal that the students could be grouped in three distinctive clusters, which can be very clearly explained in terms of the prevalence of exercise participation motives in general. The students grouped in the first cluster have the lowest average values (means) in all exercise participation motives. The students grouped in the second cluster have the profile with moderate means in all exercise participation motives, while the students grouped in the third cluster have the profile with the highest means in all exercise participation motives. Conclusions The results indicate overall higher motivation for physical activity in men. All the sub-samples are different in their relevant features used in clustering (e.g., male students are dominant in life sciences, etc.), which provide a guide both for the explanation of the results obtained and for practical implications.

Import Metadata through EPrints for Institutional Digital Repository

2019 ◽  
Vol 9 (2) ◽  
pp. 1-4
Author(s):  
Sukumar Mandal
Keyword(s):  
Open Source ◽  
Digital Library ◽  
Open Source Software ◽  
Information Services ◽  
Digital Information ◽  
Digital Repository ◽  
Library System ◽  
Different Types ◽  
Digital Library System ◽  
Important Field

Digital library is a collection of electronic objects. Information retrieval is a part of digital library system. Digital library can be developed through open source software and tools. Institutional digital repository is also an important field in present and next generation automated and digital library system. Now, this paper is present how to import metadata formats from different database by EPrints for the development of institutional digital repository. There are different types of metadata formats available in open source environment but this paper is shows some high and matured level software for development and designing this integrated framework. However, in this section has a show how to data import from Koha, Emerald, D-Space, and Vu-Find for the better management of digital information services among the users as well as library professionals.

Bridging employee curiosity and service creativity: a new lens

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kuen-Hung Tsai ◽  
Li-li Zheng
Keyword(s):  
Knowledge Sharing ◽  
Service Firms ◽  
Frontline Employees ◽  
Content Type ◽  
Main Research ◽  
Positive Effects ◽  
Task Autonomy ◽  
Different Types ◽  
Underlying Mechanisms ◽  
And Task

PurposeThis study develops a framework to examine how, why and when different traits of employee curiosity affect service creativity by considering the roles of knowledge sharing and task autonomy.Design/methodology/approachTo reduce common method bias, this work separated the variables investigated into three parts, each of which was randomly used to collect data at three different periods. A total of 822 matched questionnaires obtained from frontline employees of service firms provided useable data for hypothesis tests. A moderated mediation approach was employed to analyse the data.FindingsResults are as follows: (1) Deprivation sensitivity, joyous exploration and social curiosity have positive effects on knowledge collecting (KC) and knowledge donating (KD). (2) KD mediates the relationships between the three curiosity traits and service creativity. (3) Task autonomy enhances and suppresses the mediating effects of KC and KD, respectively, on the curiosity–service creativity relationship.Research limitations/implicationsThis study has two main research implications: First, as different types (traits) of employee curiosity have different effects on service creativity, a single-dimensional view of employee curiosity may mask the differences of individual dimension and lead to a oversimplified conclusion. Second, lifting the vein from employee curiosity to service creativity has to consider the roles of knowledge sharing and task autonomy.Originality/valueThis research is the first to contribute to the service innovation literature by revealing the underlying mechanisms through which different types of employee curiosity affect service creativity and uncovering the moderating roles of task autonomy in the process mechanisms.

Research Focus on European Education Policy

2014 ◽  
pp. 1-23
Author(s):  
Alina Mihaela Dima ◽  
Simona Vasilache
Keyword(s):  
Higher Education ◽  
Quantitative Analysis ◽  
Education Policy ◽  
Academic Research ◽  
Educational Policies ◽  
Research Focus ◽  
Main Research ◽  
European Universities ◽  
European Education ◽  
European Higher Education

This chapter includes an overview of the academic research recently dedicated to educational policies in European higher education. This chapter reviews the main research databases, looking for general and specialized articles referring to academic research, and the authors map the trends in mainstream literature. They identify the dynamics of articles dedicated to academic research, the most frequent topics, and assess their impact on educational policies in European universities. The chapter is based on a quantitative analysis of the records, as well as on the debates and analyses of the research on educational policies in recent years.

Types of Computer Corpora

2020 ◽  
pp. 1-21
Keyword(s):  
Open Source ◽  
Open Educational Resources ◽  
Language Teachers ◽  
Educational Resources ◽  
Teaching Materials ◽  
Language Analysis ◽  
Different Types

This chapter will give an overview of different types of corpora and explain their differences. It will provide readers with different examples of computer corpora that are available to users and for which language analysis can be used. Based on differences of existing corpora, the chapter will show in which way users (language teachers) can use these corpora for creating teaching materials for their students. It will explain why certain types of corpora can be and are open educational resources that provide teachers with a large number of language examples. Additionally, the chapter will examine open source technology (e.g., available tools and programs for creating computer corpora).

scholarly journals Open-Source Electronics Platforms as Enabling Technologies for Smart Cities: Recent Developments and Perspectives

Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 404 ◽  
Author(s):  
Daniel Costa ◽  
Cristian Duran-Faundez
Keyword(s):  
Open Source ◽  
Smart City ◽  
Smart Cities ◽  
Low Cost ◽  
Raspberry Pi ◽  
Computational Power ◽  
Different Types ◽  
Recent Developments ◽  
Programmable Devices ◽  
Hardware Platforms

With the increasing availability of affordable open-source embedded hardware platforms, the development of low-cost programmable devices for uncountable tasks has accelerated in recent years. In this sense, the large development community that is being created around popular platforms is also contributing to the construction of Internet of Things applications, which can ultimately support the maturation of the smart-cities era. Popular platforms such as Raspberry Pi, BeagleBoard and Arduino come as single-board open-source platforms that have enough computational power for different types of smart-city applications, while keeping affordable prices and encompassing many programming libraries and useful hardware extensions. As a result, smart-city solutions based on such platforms are becoming common and the surveying of recent research in this area can support a better understanding of this scenario, as presented in this article. Moreover, discussions about the continuous developments in these platforms can also indicate promising perspectives when using these boards as key elements to build smart cities.

scholarly journals A Focus on Soft Actuation

Actuators ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 74 ◽  
Author(s):  
Miriyev
Keyword(s):  
Artificial Intelligence ◽  
Functional Materials ◽  
Soft Material ◽  
Soft Robotics ◽  
Functional Material ◽  
Research Focus ◽  
Main Research ◽  
Soft Actuator ◽  
Grand Challenges ◽  
Actuator Design

The present editorial paper analyzes the hundred recent research works on soft actuation to understand the current main research focus in the light of the grand challenges in the field. Two characteristic paper types were obtained: one focuses on soft actuator design, manufacturing and demonstration, while another includes in addition the development of functional materials. Although vast majority of the works showcased soft actuation, evaluation of its robustness by multi-cyclic actuation was reported in less than 50% of the works, while only 10% described successful actuation for more than 1000 cycles. It is suggested that broadening the research focus to include investigation of mechanisms underlying the degradation of soft functional material performance in real cyclic actuation conditions, along with application of artificial intelligence methods for prediction of muscle behavior, may allow overcoming the reliability issues and developing robust soft-material actuators. The outcomes of the present work might be applicable to the entire soft robotics domain.

scholarly journals VOICE RECOGNITION SECURITY SYSTEM USING MEL-FREQUENCY CEPSTRUM COEFFICIENTS

2016 ◽  
Vol 9 (9) ◽  
pp. 131 ◽  
Author(s):  
P Mahalakshmi ◽  
Muruganandam M ◽  
Sharmila A
Keyword(s):  
Markov Model ◽  
Vector Quantization ◽  
Speaker Recognition ◽  
Euclidean Distance ◽  
Hidden Markov ◽  
Voice Recognition ◽  
Modern Methods ◽  
Coefficient Vector ◽  
Mel Frequency Cepstrum Coefficient ◽  
And Mathematics

ABSTRACTObjective: Voice Recognition is a fascinating field spanning several areas of computer science and mathematics. Reliable speaker recognition is a hardproblem, requiring a combination of many techniques; however modern methods have been able to achieve an impressive degree of accuracy. Theobjective of this work is to examine various speech and speaker recognition techniques and to apply them to build a simple voice recognition system.Method: The project is implemented on software which uses different techniques such as Mel frequency Cepstrum Coefficient (MFCC), VectorQuantization (VQ) which are implemented using MATLAB.Results: MFCC is used to extract the characteristics from the input speech signal with respect to a particular word uttered by a particular speaker. VQcodebook is generated by clustering the training feature vectors of each speaker and then stored in the speaker database.Conclusion: Verification of the speaker is carried out using Euclidian Distance. For voice recognition we implement the MFCC approach using softwareplatform MatlabR2013b.Keywords: Mel-frequency cepstrum coefficient, Vector quantization, Voice recognition, Hidden Markov model, Euclidean distance.

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