Status of Centrifugal Impeller Internal Aerodynamics—Part II: Experiments and Influence of Viscosity

1980 ◽  
Vol 102 (3) ◽  
pp. 738-746 ◽  
Author(s):  
D. Adler
Keyword(s):  
Viscous Flow ◽  
Experimental Work ◽  
State Of The Art ◽  
Centrifugal Impeller ◽  
Future Research ◽  
Research Topics ◽  
Flow Problems ◽  
Recent Developments ◽  
Internal Aerodynamics ◽  
The Subject

Recent developments in internal viscous aerodynamics of centrifugal impellers and related flows are critically reviewed. The overall picture which emerges provides the reader with a state-of-the-art perspective on the subject. Gaps in understanding are identified to stimulate future research. Topics included in this review are: experimental work carried out in the last decade, the structure of turbulence in curved rotating passages and solution of viscous flow problems in impellers.

Status of Centrifugal Impeller Internal Aerodynamics—Part I: Inviscid Flow Prediction Methods

1980 ◽  
Vol 102 (3) ◽  
pp. 728-737 ◽  
Author(s):  
D. Adler
Keyword(s):  
Three Dimensional ◽  
Internal Flow ◽  
Inviscid Flow ◽  
Centrifugal Impeller ◽  
Future Research ◽  
Prediction Methods ◽  
Inviscid Flows ◽  
Recent Developments ◽  
Simplifying Assumptions ◽  
Internal Aerodynamics

Recent developments in inviscid prediction methods of internal flow fields of centrifugal impellers and related flows are critically reviewed. The overall picture which emerges provides the reader with a state-of-the-art perspective on the subject. Restricting simplifying assumptions of the various methods are identified to stimulate future research. Topics included in this review are: two-dimensional subsonic and transonic inviscid flows as well as three-dimensional inviscid flows.

A Systematic Literature Review of the EFQM Excellence Model from 1991 to 2019

1970 ◽  
Vol 2 (2) ◽  
pp. 11-15
Author(s):  
Muhammad Yousaf ◽  
Petr Bris
Keyword(s):  
Quality Management ◽  
Data Collection ◽  
Literature Review ◽  
Systematic Literature Review ◽  
Quantitative Research ◽  
Web Of Science ◽  
State Of The Art ◽  
Future Research ◽  
European Foundation ◽  
The Subject

A systematic literature review (SLR) from 1991 to 2019 is carried out about EFQM (European Foundation for Quality Management) excellence model in this paper. The aim of the paper is to present state of the art in quantitative research on the EFQM excellence model that will guide future research lines in this field. The articles were searched with the help of six strings and these six strings were executed in three popular databases i.e. Scopus, Web of Science, and Science Direct. Around 584 peer-reviewed articles examined, which are directly linked with the subject of quantitative research on the EFQM excellence model. About 108 papers were chosen finally, then the purpose, data collection, conclusion, contributions, and type of quantitative of the selected papers are discussed and analyzed briefly in this study. Thus, this study identifies the focus areas of the researchers and knowledge gaps in empirical quantitative literature on the EFQM excellence model. This article also presents the lines of future research.

scholarly journals EEG-Based Emotion Recognition: A State-of-the-Art Review of Current Trends and Opportunities

2020 ◽  
Vol 2020 ◽  
pp. 1-19
Author(s):  
Nazmi Sofian Suhaimi ◽  
James Mountstephens ◽  
Jason Teo
Keyword(s):  
Emotion Recognition ◽  
State Of The Art ◽  
Research Community ◽  
Human Interaction ◽  
Human Cognition ◽  
Future Research ◽  
Emotional States ◽  
Human Beings ◽  
Eeg Signals ◽  
Recent Developments

Emotions are fundamental for human beings and play an important role in human cognition. Emotion is commonly associated with logical decision making, perception, human interaction, and to a certain extent, human intelligence itself. With the growing interest of the research community towards establishing some meaningful “emotional” interactions between humans and computers, the need for reliable and deployable solutions for the identification of human emotional states is required. Recent developments in using electroencephalography (EEG) for emotion recognition have garnered strong interest from the research community as the latest developments in consumer-grade wearable EEG solutions can provide a cheap, portable, and simple solution for identifying emotions. Since the last comprehensive review was conducted back from the years 2009 to 2016, this paper will update on the current progress of emotion recognition using EEG signals from 2016 to 2019. The focus on this state-of-the-art review focuses on the elements of emotion stimuli type and presentation approach, study size, EEG hardware, machine learning classifiers, and classification approach. From this state-of-the-art review, we suggest several future research opportunities including proposing a different approach in presenting the stimuli in the form of virtual reality (VR). To this end, an additional section devoted specifically to reviewing only VR studies within this research domain is presented as the motivation for this proposed new approach using VR as the stimuli presentation device. This review paper is intended to be useful for the research community working on emotion recognition using EEG signals as well as for those who are venturing into this field of research.

scholarly journals State of the Art in Alcohol Sensing with 2D Materials

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Ramin Boroujerdi ◽  
Amor Abdelkader ◽  
Richard Paul
Keyword(s):  
State Of The Art ◽  
2D Materials ◽  
Chemical Species ◽  
Weight Ratio ◽  
Layered Compounds ◽  
Single Atom ◽  
Future Research ◽  
Essential Factor ◽  
New Materials ◽  
Recent Developments

AbstractSince the discovery of graphene, the star among new materials, there has been a surge of attention focused on the monatomic and monomolecular sheets which can be obtained by exfoliation of layered compounds. Such materials are known as two-dimensional (2D) materials and offer enormous versatility and potential. The ultimate single atom, or molecule, thickness of the 2D materials sheets provides the highest surface to weight ratio of all the nanomaterials, which opens the door to the design of more sensitive and reliable chemical sensors. The variety of properties and the possibility of tuning the chemical and surface properties of the 2D materials increase their potential as selective sensors, targeting chemical species that were previously difficult to detect. The planar structure and the mechanical flexibility of the sheets allow new sensor designs and put 2D materials at the forefront of all the candidates for wearable applications. When developing sensors for alcohol, the response time is an essential factor for many industrial and forensic applications, particularly when it comes to hand-held devices. Here, we review recent developments in the applications of 2D materials in sensing alcohols along with a study on parameters that affect the sensing capabilities. The review also discusses the strategies used to develop the sensor along with their mechanisms of sensing and provides a critique of the current limitations of 2D materials-based alcohol sensors and an outlook for the future research required to overcome the challenges.

Information security culture – state-of-the-art review between 2000 and 2013

2015 ◽  
Vol 23 (3) ◽  
pp. 246-285 ◽  
Author(s):  
Fredrik Karlsson ◽  
Joachim Åström ◽  
Martin Karlsson
Keyword(s):  
Information Security ◽  
Research Methods ◽  
State Of The Art ◽  
Assessment Tools ◽  
Future Research ◽  
Research Topics ◽  
Content Type ◽  
Security Culture ◽  
Systems Research ◽  
Information Security Culture

Purpose – The aim of this paper is to survey existing information security culture research to scrutinise the kind of knowledge that has been developed and the way in which this knowledge has been brought about. Design/methodology/approach – Results are based on a literature review of information security culture research published between 2000 and 2013 (December). Findings – This paper can conclude that existing research has focused on a broad set of research topics, but with limited depth. It is striking that the effects of different information security cultures have not been part of that focus. Moreover, existing research has used a small repertoire of research methods, a repertoire that is more limited than in information systems research in general. Furthermore, an extensive part of the research is descriptive, philosophical or theoretical – lacking a structured use of empirical data – which means that it is quite immature. Research limitations/implications – Findings call for future research that: addresses the effects of different information security cultures; addresses the identified research topics with greater depth; focuses more on generating theories or testing theories to increase the maturity of this subfield of information security research; and uses a broader set of research methods. It would be particularly interesting to see future studies that use intervening or ethnographic approaches because, to date, these have been completely lacking in existing research. Practical implications – Findings show that existing research is, to a large extent, descriptive, philosophical or theoretical. Hence, it is difficult for practitioners to adopt these research results, such as frameworks for cultivating or assessment tools, which have not been empirically validated. Originality/value – Few state-of-the-art reviews have sought to assess the maturity of existing research on information security culture. Findings on types of research methods used in information security culture research extend beyond the existing knowledge base, which allows for a critical discussion about existing research in this sub-discipline of information security.

MEMS-Based Probe Recording Technology

2007 ◽  
Vol 7 (1) ◽  
pp. 181-192 ◽  
Author(s):  
Jiaping Yang
Keyword(s):  
Technology Development ◽  
State Of The Art ◽  
Scanning Probe ◽  
Research Topics ◽  
Recording Technology ◽  
Actuation Mechanism ◽  
Recent Developments ◽  
Probe Microscope ◽  
System Approaches ◽  
Probe Recording

This paper reviews the recent developments in the area of MEMS-based probe recording technology. Various state-of-the-art scanning probe microscope (SPM) based techniques are briefly introduced, followed by the description of system approaches of MEMS-based probe recording technology and the basic MEMS-based actuation mechanism. Subsequently, current research status in developing MEMS-based probe recording technology with emphasis on storage architecture, MEMS access systems, probe recording mechanisms, and media for terabit per square inch recording density, is reviewed. Lastly, potential research topics and prospects for MEMS-based probe recording technology development are discussed.

scholarly journals Determinantes de competitividad turística en destinos de sol y playa mexicanos

2016 ◽  
Vol 29 (68) ◽  
Author(s):  
Carlos Mario Amaya Molinar ◽  
Ana Pricila Sosa Ferreira ◽  
Pedro Moncada Jiménez
Keyword(s):  
State Of The Art ◽  
Empirical Studies ◽  
Theoretical Models ◽  
Well Being ◽  
Future Research ◽  
Resident Population ◽  
Academic Literature ◽  
Tourist Destinations ◽  
The Subject ◽  
Convenience Sampling

Resumen: el estudio se orienta a determinar si los agentes de riesgo, como la población residente y los visitantes, pueden percibir los factores de la competitividad de los destinos turísticos. Para lograr dicho objetivo se revisó el estado del arte de la literatura académica sobre el tema, se identificaron los modelos teóricos más reconocidos y las variables e indicadores utilizados con más frecuencia. El estudio empírico, realizado en dos destinos mexicanos de sol y playa, sugiere que los agentes de riesgo pueden percibir algunos de esos factores. Y aunque sólo se empleó un muestreo de conveniencia, en investigaciones futuras se podría utilizar uno probabilístico. Este trabajo contribuye a profundizar en la comprensión de los factores que determinan la competitividad de los destinos turísticos, y trasciende el empleo de índices nacionales abstractos o estudios descriptivos.Palabras clave: competitividad turística; desarrollo sostenible; estudios empíricos; turistas; bienestar en destinos.Determinants of tourist competitiveness in Mexican sun and beach destinationsAbstract: this study is aimed at determining whether the agents of risk, such as the resident population and the visitors, can perceive the competitiveness factors of tourist destinations. In order to achieve this goal the state of the art of the academic literature on the subject was reviewed. Likewise, the most recognized theoretical models and the most frequently used variables and indicators were identified. This empirical study, carried out in two Mexican sun and beach destinations, suggest that the agents of risk can perceive some of those factors. And although a convenience sampling was used now, a probabilistic one could be used in future research. This study contributes to deepening our understanding of the factors that determine tourist destinations’ competitiveness; it goes beyond the use of national abstract indexes or descriptive research.Key words: tourist competitiveness; sustainable development; empirical studies; tourists; well-being at destinations.

scholarly journals Austerity Effects on National Output and Income Inequality: A Systematic Literature Review

2021 ◽  
Vol 72 (2) ◽  
pp. 97-148
Author(s):  
Angela Okeke ◽  
Constantinos Alexiou ◽  
Joseph Nellis
Keyword(s):  
Economic Effects ◽  
Fiscal Sustainability ◽  
Empirical Literature ◽  
Future Research ◽  
Academic Researchers ◽  
Fiscal Retrenchment ◽  
Recent Developments ◽  
National Output ◽  
The Subject ◽  
Empirical Approaches

Abstract Fiscal sustainability issues over rising national debt concerns and the consequent expansionary fiscal retrenchment hypothesis has fuelled the contentious austerity vis-à-vis stimulus debate which has spawned a large empirical literature of conflicting findings on the economic effects of austerity – with particular emphasis revolving around equity and distributional issues. In this paper we attempt to summarise the growing literature on the recent developments regarding the theoretical as well as empirical approaches on national output and distributional aspects of austerity. By exploring the existing evidence in the literature on the effect of consolidation programs, we offer a more holistic overview of the subject matter through a synthesis of the extant literature and, by so doing, propose directions for future research pertinent to both academic researchers and policymakers.

Education

2020 ◽  
pp. 534-549
Author(s):  
Theofanis Exadaktylos
Keyword(s):  
Higher Education ◽  
Financial Crisis ◽  
Policy Implementation ◽  
State Of The Art ◽  
Future Research ◽  
Policy Area ◽  
Political Debates ◽  
Recent Developments ◽  
New Curricula

The purpose of this chapter is to provide a ‘state of the art’ contribution about education in Greece, reviewing recent developments and reforms. As a policy area, education remains highly controversial in Greece from developing new curricula to the politicization of higher education. The chapter reflects on the pedagogical and political debates of the recent decades focusing on issues of policy implementation. It highlights the most recent round of reforms since 2011 including those resulting from the advent of Syriza to power, and looks at the period of the financial crisis to discuss issues of funding, the bailout agreements, and neoliberal ideas behind higher education. The chapter concludes by offering some suggestions for future research and sets out some of the respective challenges.

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