Performance analysis of Polyvinylpyrrolidone

2019 ◽  
Vol 31 (5) ◽  
pp. 619-629
Author(s):  
R. Rathinamoorthy
Keyword(s):  
Performance Analysis ◽  
Dye Transfer ◽  
Direct Dyes ◽  
Colour Difference ◽  
Content Type ◽  
Stain Removal ◽  
Washing Efficiency ◽  
Transfer Inhibitor ◽  
Commercial Detergent ◽  
Chitosan Composite

Purpose The purpose of this paper is to focus on the performance analysis of Polyvinylpyrrolidone (PVP) – Chitosan composite dye transfer inhibitor (DTI) for household laundry. The developed composite DTI is tested against different commercial dyes and detergent powders normally used in the household laundry for its performance. Design/methodology/approach The DTI article is tested for its performance against five commercial dyes and five commercial detergent compositions. The dye re-deposition behaviour of the control fabric was measured in terms of the colour difference (ΔE) values. The influence of PVP on the washing efficiency of detergent was evaluated against tea, coffee and juice stains. Findings The results showed that there is an excellent performance of the developed product noted in terms of DTI performance against reactive, basic and sulfur dyes. The DTI product showed a significantly (p<0.05) less performance against acid and direct dyes. There is no significant differences noted in the stain removal efficiency of the detergent in the presence of PVP in the wash liquor (p>0.05). Originality/value The usage of DTI polymer in the household laundry has no significant influence on the detergents performance in terms of stain removing efficiency. The DTI polymer’s function in the wash liquor depends up on the type of polymer used, as they are sensitive to the type of detergent compositions used and the type of dyes bleeds in the wash liquor.

Combination of importance-performance analysis and response surface methodology for enhancing satisfaction

2016 ◽  
Vol 33 (6) ◽  
pp. 792-802 ◽  
Author(s):  
Ro Jin Pak
Keyword(s):  
Response Surface Methodology ◽  
Performance Analysis ◽  
Response Surface ◽  
Online Courses ◽  
Current Status ◽  
Entrance Examination ◽  
College Entrance Examination ◽  
College Entrance ◽  
Statistical Tool ◽  
Content Type

Purpose – In order to know how to enhance the satisfaction of online courses in preparing for the college entrance examination in Korea, the purpose of this paper is to combine both the importance-performance analysis (IPA) and the response surface methodology (RSM). Design/methodology/approach – IPA is a simple but powerful tool for understanding the current status of factors or attributes in management problems. However, it lacks to provide the proper indication of what to do next on those factors or attributes to optimize a goal. RSM is a statistical tool helping us to set up a direction of factors or attributes in optimizing an output. The author attempts to combine both IPA and RSM in order to discover the next step after IPA for optimizing the goal. As an example, the author considers how to enhance the satisfaction of online courses in preparing for the college entrance examination in Korea. Findings – The combination of IPA and RSM enables us to find a way to attain a goal, for example, satisfying customers in a concrete and creative way. Research limitations/implications – Sample size is enough for research purpose but is a bit small for general purpose. Practical implications – This research tries to answer what to do next after IPA. Social implications – This research provides a predictive guide to satisfy customers. Originality/value – As far as the author knows, combining both IPA and RSM has not been made so far. It is a fusion of managerial and engineering techniques.

Design and development of an aircraft type portable drone for surveillance and disaster management

2018 ◽  
Vol 6 (3) ◽  
pp. 147-159 ◽  
Author(s):  
Kazi Mahmud Hasan ◽  
S.H. Shah Newaz ◽  
Md. Shamim Ahsan
Keyword(s):  
Performance Analysis ◽  
Real Time ◽  
Disaster Management ◽  
Ground Control ◽  
Content Type ◽  
Recovery System ◽  
Ground Control Station ◽  
Autonomous Aircraft ◽  
Aircraft Type ◽  
The Cost

Purpose The purpose of this paper is to demonstrate the development of an aircraft-type autonomous portable drone suitable for surveillance and disaster management. The drone is capable of flying at a maximum speed of 76 km/h. This portable drone comprises five distinct parts those are easily installable within several minutes and can be fit in a small portable kit. The drone consists of a ballistic recovery system, allowing the drone landing vertically. The integrated high-definition camera sends real-time video stream of desired area to the ground control station. In addition, the drone is capable of carrying ~1.8 kg of payload. Design/methodology/approach In order to design and develop the portable drone, the authors sub-divided the research activities in six fundamental steps: survey of the current drone technologies, design the system architecture of the drone, simulation and modeling of various modules of the drone, development of various modules of the drone and their performance analysis, integration of various modules of the drone, and real-life performance analysis and finalization. Findings Experimental results: the cruise speed of the drone was in the range between 45 and 62 km/h. The drone was capable of landing vertically using the ballistic recovery system attached with it. On the contrary, the drone can transmit real-time video to the ground control station and, thus, suitable for surveillance. The audio system of the drone can be used for announcement of emergency messages. The drone can carry 1.8 kg of payload and can be used during disaster management. The drone parts are installed within 10 min and fit in a small carrying box. Practical implications The autonomous aircraft-type portable drone has a wide range of applications including surveillance, traffic jam monitoring and disaster management. Social implications The cost of the cost-effective drone is within $700 and creates opportunities for the deployment in the least developed countries. Originality/value The autonomous aircraft-type portable drone along with the ballistic recovery system were designed and developed by the authors using their won technology.

Twenty years of the Journal of Knowledge Management: a bibliometric analysis

2018 ◽  
Vol 22 (8) ◽  
pp. 1655-1687 ◽  
Author(s):  
Magaly Gaviria-Marin ◽  
Jose M. Merigo ◽  
Simona Popa
Keyword(s):  
Knowledge Management ◽  
Performance Analysis ◽  
Bibliometric Analysis ◽  
Historical Record ◽  
Content Type ◽  
The Usa ◽  
20Th Anniversary ◽  
Number Of Publications ◽  
The Uk ◽  
Positive Evolution

Purpose In 2017, the Journal of Knowledge Management (JKM) celebrates its 20th anniversary. This study aims to show an updated analysis of their publications to provide a general overview of the journal, focusing on a bibliometric analysis of its publications between 1997 and 2016. Design/methodology/approach The methodology involves two procedures: a performance analysis and a science mapping analysis of JKM. The performance analysis uses a series of bibliometric indicators such as h-index, productivity and citations. This analysis considers different dimensions, including papers, authors, universities and countries. VOSviewer software is used to carry out the mapping of science of JKM, which, based on the concurrence of key words and co-citation points of view, seeks to graphically analyze the structure of the references of this journal. Findings There is a positive evolution in the number of publications (although with certain oscillations), which shows a growing interest in publishing in JKM. The USA and the UK lead the publications in this journal, although at a regional level, Europe is the most productive. The low participation of emerging economies in JKM is also observed. Practical implications The paper will identify the leading trends in the journal in terms of papers, authors, institutions, countries, journals and keywords. This study is useful for obtaining a quick snapshot of what is happening in the journal. Originality/value From the historical record of JKM publications, this study presents an exclusive bibliometric analysis of its publications until 2016 and identifies its main trends.

Advanced aircraft performance analysis

2018 ◽  
Vol 90 (4) ◽  
pp. 627-638 ◽  
Author(s):  
Marc Immer ◽  
Philipp Georg Juretzko
Keyword(s):  
Performance Analysis ◽  
Design Process ◽  
Performance Optimization ◽  
Electric Propulsion ◽  
Vertical Plane ◽  
Aircraft Design ◽  
Efficient Design ◽  
Content Type ◽  
Aircraft Performance ◽  
Hybrid Electric

Purpose The preliminary aircraft design process comprises multiple disciplines. During performance analysis, parameters of the design mission have to be optimized. Mission performance optimization is often challenging, especially for complex mission profiles (e.g. for unmanned aerial vehicles [UAVs]) or hybrid-electric propulsion. Therefore, the purpose of this study is to find a methodology that supports aircraft performance analysis and that is applicable to complex profiles and to novel designs. Design/methodology/approach As its core element, the developed method uses a computationally efficient C++ software “Aircraft Performance Program” (APP), which performs a segment-based mission computation. APP performs a time integration of the equations of motion of a point mass in the vertical plane. APP is called via a command line interface from a flexible scripting language (Python). On top of APP’s internal radius of action optimization, state-of-the-art optimization packages (SciPy) are used. Findings The application of the method to a conventional climb schedule shows that the definition of the top of climb has a significant influence on the resulting optimum. Application of the method to a complex UAV mission optimization, which included maximizing the radius of action, was successful. Low computation time enables to perform large parametric studies. This greatly improves the interpretation of the results. Research limitations/implications The scope of the paper is limited to the methodology that allows for advanced performance analysis at the conceptual and preliminary design stages with an emphasis on novel propulsion concepts. The methodology is developed using existing, validated methods, and therefore, this paper does not contain comprehensive validation. Other disciplines, such as cost analysis, life-cycle assessment or market analysis, are not considered. Practical implications With the proposed method, it is possible to obtain not only the desired optimum mission performance but also off-design performance of the investigated design. A thorough analysis of the mission performance provides insight into the design’s capabilities and shortcomings, ultimately aiding in obtaining a more efficient design. Originality/value Recent developments in the area of hybrid or hybrid-electric propulsion systems have shown the need for performance computation tools aiding the related design process. The presented method is especially valuable when novel design concepts with complex mission profiles are investigated.

Performance analysis of erosion resistant Mo2C reinforced WC-CoCr coating for pump impeller with Taguchi’s method

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jashanpreet Singh ◽  
Jatinder Pal Singh
Keyword(s):  
Performance Analysis ◽  
Power Plants ◽  
Slurry Erosion ◽  
Pump Impeller ◽  
Content Type ◽  
And Performance ◽  
Thermally Sprayed ◽  
Practical Implications ◽  
Mill Process ◽  
Cobalt Chrome

Purpose This study aims to deal with development and performance analysis of high-velocity oxy-fuel (HVOF) thermally sprayed Mo2C-based WC-CoCr (tungsten carbine cobalt chrome) (Co-10% and Cr-4%) cermet coating deposited on the pump impeller steel 316 L. Design/methodology/approach In this work, a study was carried out by modifying the conventional WC-CoCr powder with a small addition of molybdenum carbide (Mo2C). Reinforcement was done by 1–4 wt.% addition of Mo2C feedstocks in WC-CoCr powder by using a jar ball mill process. The design of experiment was implemented for optimization of the percentage of Mo2C feedstock. L16 (4 × 4) orthogonal array was used to design the experiments for erosion output for the input parameters namely velocity, particle size, concentration and Mo2C proportion. Findings Results show that the Mo2C-based WC-CoCr coating provides better microhardness as compared to conventional WC-CoCr coating. The present study also reveals that the deposition of conventional WC-CoCr coating has improved the wear resistance of SS 316 L by 9.98%. However, the slurry erosion performance of conventional WC-CoCr coating was improved as 69.6% by the addition of 3% Mo2C. Practical implications WC-CoCr coatings are universally used for protecting the equipment and machinery from abrasion, erosion and corrosion. So, the 3% Mo2C-based WC-CoCr can be useful in power plants and various industries like mining, chemical, automobile, cementing and food processing industries. Originality/value A new HVOF coating has been developed by the addition of Mo2C feedstock in WC-CoCr powder (Co 10% and Cr 4%) and the percentage of Mo2C feedstock was optimized to improve the tribological behavior of WC-CoCr coating.

Importance-performance analysis (IPA) of the indoor environmental quality (IEQ) of an EDGE-certified building in Ghana

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Kofi Agyekum ◽  
Elorm Emil Koku Akli-Nartey ◽  
Augustine Senanu Kukah ◽  
Amma Kyewaa Agyekum
Keyword(s):  
Performance Analysis ◽  
Environmental Quality ◽  
Gap Analysis ◽  
Green Buildings ◽  
Indoor Environmental Quality ◽  
Content Type ◽  
Artificial Lighting ◽  
Survey Results ◽  
Space Layout ◽  
Visual Privacy

PurposeThe excellence in design and greater efficiencies (EDGE) certification system has seen a gradual adoption worldwide, with Ghana having six out of its eight certified green buildings bearing an EDGE certification. However, little is known about occupants’ satisfaction with the indoor environmental quality (IEQ) of EDGE-certified buildings. Therefore, the purpose of this study is to examine the satisfaction of occupants with the IEQ of an EDGE-certified building in Ghana by identifying their perceived performance of the indoor environment relative to their perceived importance.Design/methodology/approachA survey was conducted to evaluate the performance of 12 IEQ parameters with the occupants of an EDGE-certified office building. The survey results were evaluated using a gap analysis and both traditional and alternative Importance-Performance Analysis (IPA) matrices.FindingsThe findings revealed that noise level, temperature, cleanliness, sound privacy, air quality and humidity were IEQs that required the highest priority for improvement. Daylight and artificial lighting showed no appreciable performance gap. Space layout was adequately satisfied, whereas space size was overly satisfied. Visual privacy and outdoor view were found to require low priority of improvement.Originality/valueThis study contributes to the state-of-the-art of the IEQ of green buildings. It pioneers the research that seeks to examine the IEQ of EDGE-certified buildings. The gap analysis and the IPA were effective in prioritizing the IEQs for improvement action and provided a practical research framework that helped researchers examine the performance of green buildings, thereby giving valuable feedback to policymakers and building owners.

Assessment of residential institute foodservice using Kano categorization and importance–performance analysis

2020 ◽  
Vol 32 (3) ◽  
pp. 401-428 ◽  
Author(s):  
Aayush Singha Roy ◽  
Dipankar Bose ◽  
U.K. Bera
Keyword(s):  
Performance Analysis ◽  
Undergraduate Students ◽  
High Performance ◽  
Design Methodology ◽  
Functional Type ◽  
Multiple Methods ◽  
Self Assessment ◽  
Residential Students ◽  
Content Type ◽  
And Performance

PurposeIn this article, we identify various foodservice-related attributes that are important for undergraduate students residing in hostels and avail service from specific foodservice providers. We also investigate the performance of attributes to determine areas where the foodservice providers should maintain a high performance or where improvement is required.Design/methodology/approachWe apply the Kano methodology to design the questionnaire for 24 different attributes. For each attribute, we construct three questions; namely, functional type, dysfunctional type, and performance of the hostel foodservice. We collect a total of 317 responses. We use multiple methods to determine the dominant category. Finally, combining the values of these methods, we study relative positions of the attributes in the importance–performance grid.FindingsBased on the Kano categorization, quality-related attributes are most important, followed by hygiene, comfort, availability, variety, and time, in the descending order. The gender of the respondent plays an important role in categorization of some attributes. Using the importance–performance analysis, we identify the attributes where the foodservice provider should maintain a high performance or where improvement is required. Improvements in some attributes are difficult due to foodservice provider's self-assessment of high performance or high difficulty for improvement.Originality/valueIn this study, we examine the importance of various foodservice attributes among undergraduate residential students. We combine multiple methods of Kano categorization to compute importance values of the attributes. We also investigate the reasons behind the gap between student's and foodservice manager's perception of the performance of these attributes.

scholarly journals Comparing crisis management practices in the hotel industry between initial and pandemic stages of COVID-19

2020 ◽  
Vol 32 (10) ◽  
pp. 3135-3156 ◽  
Author(s):  
Ivan Ka Wai Lai ◽  
Jose Weng Chou Wong
Keyword(s):  
Performance Analysis ◽  
Human Resources ◽  
Crisis Management ◽  
Management Practices ◽  
Management Strategies ◽  
Hotel Industry ◽  
Content Type ◽  
Initial Stage ◽  
Travel Restrictions ◽  
Hotel Managers

Purpose Given the increasing number of travel restrictions, the COVID-19 outbreak has dealt a crippling blow to the hotel industry, and the crisis management practices supporting the industry needs are changing as the pandemic continues. This study aims to compare how the hotel industry has responded to this crisis at the initial stage and the pandemic stage. Design/methodology/approach Data were collected from hotel managers in Macau in two occasions, namely, early February and early April 2020. Importance-usage-performance analysis was conducted to classify six categories of practices (pricing, marketing, maintenance, human resources, government assistance and epidemic prevention) into four executable crisis management strategies (priority, maintain, low priority and possible overkill) for each stage. Follow-up in-person interviews were conducted to validate the results of the study. Findings In the initial stage, priority strategies should be applied in all epidemic prevention, pricing and maintenance practices and in two governmental assistance and human resources practices. In the pandemic stage, all epidemic prevention practices remain at the priority quadrant, but two pricing practices are downgraded. Hotels tended to force labour into unpaid vacations (furlough) and postpone office and system maintenance. Governmental assistance should be at a low priority. Originality/value This study contributes to the knowledge of contingency planning for crisis management across crisis periods. It also demonstrates the processes of importance-usage-performance analysis for researchers to undertake further studies in tourism crisis management. Timely recommendations for governments and hotel industry stakeholders are provided to cope with this crisis.

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