Fabrication and performance evaluation of two multi-layer passive micromixers

Sensor Review ◽  
2018 ◽  
Vol 38 (3) ◽  
pp. 321-325 ◽  
Author(s):  
Xueye Chen ◽  
Jienan Shen ◽  
Zengliang Hu
Keyword(s):  
Reynolds Number ◽  
Performance Evaluation ◽  
Design Methodology ◽  
Experimental Results ◽  
Microfluidic Chips ◽  
Mixing Index ◽  
Number Range ◽  
Content Type ◽  
Chaotic Convection ◽  
And Performance

PurposeThe purpose of this study is to provide a micromixer for achieving effective mixing of two liquids. The mixing of two liquids is difficult to achieve in microfluidic chips because they cannot form turbulence at small dimensions and velocities.Design/methodology/approachIn this paper, four kinds of passive micromixers based on splitting–recombination and chaotic convection are compared. First, a better E-shape mixing unit based on the previous F-shape mixing unit has been designed. Then, the E-shape mixing units are further combined to form three micromixers (i.e. E-mixer, SESM and FESM).FindingsFinally, the mixing experimental results show that the mixing indexes of E-mixer, SESM and FESM are more than those of F-mixer when the Reynolds number range is from 0.5 to 100. And at Re = 15, the lowest mixing index of E-mixer is 71%, which is the highest of the four micromixers.Originality/valueAt Re = 80, the highest mixing index of F-mixer and E-mixer is 92 and 94 per cent, respectively, and then it begins to decrease. But the mixing index of SESM and FESM remains close to 100 per cent.

Organizational performance evaluation and performance paradox in CCI organizations

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Marge Sassi ◽  
Ülle Pihlak ◽  
Gesa Birnkraut
Keyword(s):  
Performance Evaluation ◽  
Mixed Methods ◽  
Organizational Performance ◽  
Mixed Methods Research ◽  
Design Methodology ◽  
Creative Industries ◽  
Expert Interviews ◽  
Content Type ◽  
And Performance ◽  
Cultural And Creative Industries

PurposeThe study aims to understand how practicing organizational performance evaluation (OPE) is related to the performance paradox (tensions between creative freedom and survival challenges) in “evaluation-hesitant” cultural and creative industries (CCI) organizations.Design/methodology/approachMixed methods research, consisting of moderation analyses and unstructured expert interviews.FindingsA conceptual model is developed to explain how creative freedom and survival challenges affect OPE in “evaluation-hesitant” CCI organizations.Originality/valueThe authors bring a new understanding to the factors that contribute to evaluation-hesitance in CCI. The paper contributes to discussing both the theory of paradox and flow theory in explaining the relations between OPE, creative freedom and survival challenges.

The construction of knowledge from the scientific literature about the theme seaport performance evaluation

2015 ◽  
Vol 64 (2) ◽  
pp. 243-269 ◽  
Author(s):  
Ademar Dutra ◽  
Vicente Mateo Ripoll-Feliu ◽  
Arturo Giner Fillol ◽  
Sandra Rolim Ensslin ◽  
Leonardo Ensslin
Keyword(s):  
Performance Evaluation ◽  
Design Methodology ◽  
Development Process ◽  
Web Of Science ◽  
Scientific Literature ◽  
Strategy Research ◽  
Content Type ◽  
Construction Of Knowledge ◽  
And Performance ◽  
Research Action

Purpose – The purpose of this paper is to know what scientific literature presents about the theme evaluation of seaport performance, thus enabling the construction of knowledge in the researchers and the identification of gaps in the research that will lead to advances in the area from the identification of the characteristics of a portfolio of relevant international publications. Design/methodology/approach – From the basic philosophical (constructivism), of the kind strategy (research-action) and the method used for the accomplishment of such strategy (structured process knowledge development process – constructivist (ProKnow-C)) the current research has a qualitative approach. Findings – From the analysis of the bibliographic portfolio composed of 23 articles, the main results were: focus of the evaluation of seaport performance is on operational and tactical efficiency rather than on strategic and global performance; the majority of the studies does not relate to the reality experienced by seaport managers due to the limited interaction with these managers, evidencing a distance of the researchers from the object of their research; and performance evaluation was barely used/explored as a tool to support management, only for the sake of evaluation itself. Research limitations/implications – The search occurred in the databases Web of Science, Scopus, Proquest, Ebsco, Sciece Direct and Wiley. Originality/value – The identification of gaps that might promote advances in this field of knowledge, once the seaport segment is not exploring the potential that performance evaluation can offer and is already available in literature.

“Please tidy up before leaving”: nudging Airbnb guests toward altruistic behavior

2019 ◽  
Vol 13 (4) ◽  
pp. 524-530 ◽  
Author(s):  
Paul Ranson ◽  
Daniel Guttentag
Keyword(s):  
Social Presence ◽  
Design Methodology ◽  
Field Experiments ◽  
Experimental Results ◽  
Altruistic Behavior ◽  
Content Type ◽  
The Social ◽  
Relationship Model ◽  
Social Market ◽  
Practical Implications

Purpose This study aimed to investigate whether increasing the social presence within an Airbnb lodging environment could nudge guests toward altruistic cleaning behaviors. Design/methodology/approach The study was based around a theoretical framework combining the social-market versus money-market relationship model, nudge theory and social presence theory. A series of three field experiments were conducted, in which social presence was manipulated to test its impact on guest cleaning behaviors prior to departure. Findings The experimental results confirmed the underlying hypothesis that an Airbnb listing’s enhanced social presence can subtly induce guests to help clean their rental units prior to departure. Originality/value This study is the first to examine behavioral nudging in an Airbnb context. It is also one of the first field experiments involving Airbnb. The study findings offer clear theoretical and practical implications.

Creating a growth mindset

2017 ◽  
Vol 16 (4) ◽  
pp. 155-160
Author(s):  
Ian Johnston
Keyword(s):  
Case Studies ◽  
Design Methodology ◽  
Growth Mindset ◽  
Cultural Space ◽  
Content Type ◽  
Fixed Mindset ◽  
And Performance

Purpose This paper aims to show that everything a business does is fundamentally reliant on its culture. Culture determines how successful a strategy is and whether that strategy can be executed. If the culture in a business is out of alignment, it is imperative to change it. This paper examines how HR professionals can take ownership of this cultural space and help to create a growth mindset throughout the organisation. Design/methodology/approach The paper is based on experience gained through working with several large organisations to transform their people culture and performance by embracing a growth mindset and to help their HR leadership become the early champions of change, thus ensuring the process was successfully delivered. The paper includes case studies of two organisations where successful cultural shaping delivered improved results. Findings Companies with a growth mindset will outperform those with a fixed mindset. Changing mindsets is not overly complex, but it requires flawless implementation with the HR leaders at the forefront. Originality/value As Lou Gerstner, who turned around the computing giant IBM, said “I finally realised that culture is not part of the game, it is the game”. By understanding how individual mindsets impact culture, HR professionals can own and drive their organisation’s culture-shaping efforts.

They teach, but do they apply?

2019 ◽  
Vol 10 (3) ◽  
pp. 743-766
Author(s):  
Anete Petrusch ◽  
Guilherme Luís Roehe Vaccaro ◽  
Juliane Luchese
Keyword(s):  
Design Methodology ◽  
Additional Data ◽  
Effective Sample Size ◽  
Exploratory Research ◽  
Lean Thinking ◽  
Content Type ◽  
Administrative Services ◽  
The Usa ◽  
And Performance ◽  
The Uk

Purpose Although discussed for more than 20 years, information about Lean adoption in higher education institutions (HEIs) is scarce, especially in developing countries. This research aims to investigate the degree of Lean thinking adoption on administrative services of Brazilian private HEIs. The results are compared to studies from USA and UK, highlighting the maturity on enablers, principles, tools and performance measures related to Lean. Design/methodology/approach A quantitative survey research was carried out. The instrument is adapted for HEIs from the proposal of Malmbrandt and Åhlström (2013) for Lean services. Cronbach’s alpha and factor analysis were used to validate the adapted instrument. Additional data analysis was based on non-parametric tests. Findings No evidence of broad implementation of Lean thinking in administrative processes of Brazilian private HEIs was found, with the adoption being incipient. The results are convergent to those presented by other studies in the USA and the UK. There is a gap between the existing knowledge about Lean in the academic sphere of the HEIs and its application on their academic processes. Research limitations/implications The effective sample size was of 47, despite contacts being sent to 2,090 institutions. This sample allows exploratory research, although further research is required. Results are adherent to those found in research from other countries. Originality/value The research presents descriptive and exploratory results regarding the adoption of Lean in Brazilian HEIs. No previous similar research was found in the literature.

Institutions do matter

2017 ◽  
Vol 6 (1) ◽  
pp. 72-82 ◽  
Author(s):  
Luen Tim Percy Lui
Keyword(s):  
Hong Kong ◽  
Institutional Theory ◽  
Political Institutions ◽  
Design Methodology ◽  
Good Governance ◽  
Government Performance ◽  
Special Administrative Region ◽  
Content Type ◽  
Legislative Council ◽  
And Performance

Purpose The purpose of this paper is to examine how institutional designs governing the executive-legislative relations in the Hong Kong Special Administrative Region (HKSAR) have weakened the government’s capacity to effectively govern the HKSAR. Design/methodology/approach This paper examines institutional designs and rules that govern Hong Kong’s executive-legislative relations. It uses the case of the HKSAR Legislative Council (LegCo) to illustrate the impacts of institutional designs and rules on the performance of political institutions and government performance. Findings This paper finds that institutional designs and rules do affect the performance of a political institution. This paper suggests changes to the institutional designs and rules that govern the operation of the HKSAR LegCo, and the interaction between the legislature and the executive so as to create a facilitative context for good governance. Originality/value Studies on governance in Hong Kong mostly focus on individual institution’s behavior and performance. This paper studies the problem of governance in Hong Kong from the perspective of executive-legislative relations. It adopts the institutional theory to examine the behavior, performance, and interaction between the legislative and executive branches.

Principles and practice in impact assessment for academic libraries

2018 ◽  
Vol 119 (1/2) ◽  
pp. 121-134 ◽  
Author(s):  
Christine Urquhart
Keyword(s):  
Performance Evaluation ◽  
Impact Assessment ◽  
Academic Libraries ◽  
Data Analytics ◽  
Open Data ◽  
Library Services ◽  
Content Type ◽  
Qualitative And Quantitative ◽  
Library Assessment ◽  
And Performance

Purpose This paper aims to examine the principles that underpin library assessment, methods used for impact and performance evaluation and how academic libraries should use the findings, and it discusses how value frameworks help. Design/methodology/approach This is a literature review covering aspects of value (value propositions, value co-creation), value frameworks (including the 2015 ACRL framework, Holbrook typology with worked example), data analytics and collaborative projects including LibQUAL+ initiatives and the use of balanced scorecard principles (including a values scorecard). Findings The use of data analytics in library assessment requires collaboration among library services to develop reliable data sets. Scorecards help ongoing impact and performance evaluation. Queries that arise may require a framework, or logic model, to formulate suitable questions and assemble evidence (qualitative and quantitative) to answer new questions about the value of library services. The perceived value framework of Holbrook’s typology, the values scorecard and the ACRL framework all support the deeper level of inquiry required. Research limitations/implications Includes examples of possible application of frameworks. Practical implications A value framework might help data analytic approaches in combining qualitative and quantitative data. Social implications Impact assessment may require assessing how value is co-created with library users in use of e-resources and open data. Originality/value The study contrasts the varying approaches to impact evaluation and library assessment in academic libraries, and it examines more in-depth value frameworks.

A validation of the performance management scale

2018 ◽  
Vol 35 (6) ◽  
pp. 1253-1267 ◽  
Author(s):  
Khahan Na-nan ◽  
Kanokporn Chaiprasit ◽  
Peerapong Pukkeeree
Keyword(s):  
Factor Analysis ◽  
Performance Evaluation ◽  
Performance Management ◽  
Goodness Of Fit ◽  
Mean Square ◽  
Evaluation Performance ◽  
Content Type ◽  
Performance Review ◽  
And Performance ◽  
Fit Index

Purpose The purpose of this paper is to develop a performance management (PM) scale questionnaire that encompasses the pre-requisite, performance planning, performance evaluation, performance review, and performance application dimensions of PM. Design/methodology/approach In the study, the 33 questionnaire questions were first validated using exploratory factor analysis (EFA) and then by confirmatory factor analysis (CFA) along the three performance dimensions. The research sample consists of 330 entrepreneurs. The factor analysis results confirm the validity of the questionnaire as a reliable entrepreneur PM evaluation tool, as evidenced by the composite reliability of 0.845 and the average variance extracted of 0.532. Findings All constructs revealed the acceptable internal consistency reliability. A good model fit was found for the measurement model using several fit index like χ2=449.983, degree of freedom=415, p-value (p)=0.114, goodness of fit index=0.927, adjusted goodness of fit index=0.901, root mean square error of approximation=0.016, and root of mean square residuals=0.032. Research limitations/implications The PM model was examined using EFA and CFA only. A sample with only SMEs entrepreneurs and large sample size and sample area can be used in future research. Practical implications This research paper is an endeavor to explore only the reliability and validity of the PM model. Thus all the five dimension, namely “pre-requisite” “performance planning,” “performance evaluation,” “performance review,” and “performance application” proved out of be reliable and validated when it will be tested in case of SMEs’ high-growth sectors and high-impact sectors. Originality/value The main contribution of this research is that all factors have a good fit and acceptable reliability value; each factor can be measured individually depending on the nature of the research.

Used vehicle global supply chains: perspectives on a direct-import model

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yangyan Shi ◽  
Tiru Arthanari ◽  
V.G. Venkatesh ◽  
Samsul Islam ◽  
Venkatesh Mani
Keyword(s):  
New Zealand ◽  
Time Management ◽  
Design Methodology ◽  
Structured Interview ◽  
Global Supply Chains ◽  
Business Practices ◽  
Content Type ◽  
And Performance ◽  
Key Aspects ◽  
Practical Implications

Purpose This study aims to provide a comprehensive understanding of the supply chain (SC) operations of importing used vehicles into New Zealand and how such SCs affect business practices and performance. Design/methodology/approach The study uses an exploratory qualitative semi-structured interview approach to interview the different stakeholders involved in the global used vehicle SC. Findings The research identifies the overall network structure of the used import vehicle SC from Japan to New Zealand and characterises key aspects of its operations and network connections. This paper finds that Japanese buying agents have integrated increasing numbers of services to provide a trouble-free trading platform, which has created a direct-import model for used vehicle companies in New Zealand. Practical implications The findings and recommendations are useful in designing and managing the used vehicle SC for all stakeholders and effective real-time management of uncertain factors. Originality/value The paper primarily analyses SC operations by researching the cooperation and coordination between SC components and networks, based on providing the flow of used vehicles from Japan to New Zealand. It constitutes a pioneering practice-perspective research paper in this domain.

Simulation on an electro-hydrostatic actuator controlled by a high-pressure piezoelectric pump with a displacement amplifier

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Bin Wang ◽  
Nanyue Xu ◽  
Pengyuan Wu ◽  
Rongfei Yang
Keyword(s):  
Mathematical Model ◽  
High Pressure ◽  
Design Methodology ◽  
Characteristic Analysis ◽  
Piezoelectric Pump ◽  
Component Level ◽  
Content Type ◽  
Amplification Ratio ◽  
And Performance ◽  
System Characteristics

Purpose The purpose of this paper is to provide a new hydrostatic actuator controlled by a piezoelectric piston pump and to reveal its characteristics. Design/methodology/approach In this paper, a piezoelectric pump with passive poppet valves and hydraulic displacement amplifier is designed as a new control component in a hydrostatic actuator for high actuation capacity. A component-level mathematical model is established to describe the system characteristics. Simulation verification for cases under typical conditions is implemented to evaluate the delivery behavior of the pump and the carrying ability of the actuator. Findings By using the displacement amplifier and the passive distributing valves, simulation demonstrates that the pump can deliver flow rate up to 3 L/min, and the actuator controlled by this pump can push an object weighing approximately 50 kg. In addition, it is particularly important to decide a proper amplification ratio of the amplifier in the pump for better actuation performance. Originality/value The piezoelectric pump presented in this paper has its potential to light hydrostatic actuator. The model constructed in this paper is valid for characteristic analysis and performance evaluation of this pump and actuators.

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