Process Monitoring of 3D Metal Printing in Industrial Scale

2018 ◽  
Author(s):  
Mohammadhossein Amini ◽  
Shing Chang
Keyword(s):  
3D Printing ◽  
Process Monitoring ◽  
Numerical Study ◽  
High Reliability ◽  
Factors Affecting ◽  
Main Metal ◽  
Metal Printing ◽  
Metal 3D Printing ◽  
Using Data

Metal 3D printing is one of the fastest growing additive manufacturing (AM) technologies in recent years. Despite the improvements and capabilities, reliable metal printing is still not well understood. One of the barriers of industrialization of metal AM is process monitoring and quality assurance of the printed product. These barriers are especially much highlighted in aerospace and medical device manufacturing industries where the high reliability and quality is needed. Selective Laser Melting (SLM) is one of the main metal 3D printing methods where it is known that more than 50 parameters are affecting the quality of the print. However, the current SLM printing process barely utilize a fraction of the collected data during production. Up to this point, no study to the best of our knowledge examines the correlation of factors affecting the quality of the print. After reviewing the current state of the art of process monitoring for metal AM involving SLM, we propose a method to control the process of the print in each layer and prevent the defects using data-driven techniques. A numerical study using simulated numbers is provided to demonstrate how the proposed method can be implemented.

scholarly journals Strategic Aspect of Knowledge Management

Organizacija ◽  
2017 ◽  
Vol 50 (2) ◽  
pp. 163-176 ◽  
Author(s):  
Olja Arsenijević ◽  
Dragan Trivan ◽  
Iztok Podbregar ◽  
Polona Šprajc
Keyword(s):  
Knowledge Management ◽  
Tacit Knowledge ◽  
First Generation ◽  
Point Of View ◽  
Factors Affecting ◽  
Level Of Knowledge ◽  
Empirical Point ◽  
Using Data ◽  
Tacit Knowledge Management

Abstract Background and Purpose: This paper analyses the strategic aspects of knowledge management in organizations in Serbia, from the theoretical and empirical point of view. In its theoretical part, the paper analyzes the latest literature in the fields of knowledge management, relations between communications strategyes and knowledge management, generations of knowledge management and organizational culture. Design/Methodology/Approach: In its empirical part, the paper deals with determining the level of knowledge management in Serbian organizations through diffrent generations of knowledge management, as well as the problem with explicit and tacit knowledge management. The hypotheses were tested using data colleted from organizatons in Serbia via questionnaire, which consisted of 50 questions to examine five key factors in knowledge management. Results: The results showed that out of 41 indicators, only eight are rated positively. Results of t-test indicate significant distinctions within factors affecting the quality of knowledge management, as well as differences in quality of explicit and tacit knowledge management, therefore they confirmed both hypotheses. Conclusion: The knowledge management projects in organizations in Serbia are initiated, as well as that belonging to the first generation of knowledge management can be defined.

Hybrid Metal 3D Printing for Selective Polished Surface

2021 ◽  
Vol 1027 ◽  
pp. 136-140
Author(s):  
Sze Yi Mak ◽  
Kwong Leong Tam ◽  
Ching Hang Bob Yung ◽  
Wing Fung Edmond Yau
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Surface Finishing ◽  
Polished Surface ◽  
Post Processing ◽  
One Stop ◽  
Metal 3D Printing ◽  
Critical Challenge ◽  
Metal Additive

Metal additive manufacturing has found broad applications in diverse disciplines. Post processing to homogenize and improve surface finishing remains a critical challenge to additive manufacturing. We propose a novel one-stop solution of adopting hybrid metal 3D printing to streamlining the additive manufacturing workflow as well as to improve surface roughness quality of selective interior surface of the printed parts. This work has great potential in medical and aerospace industries where complicated and high-precision additive manufacturing is anticipated.

scholarly journals Scaling Down the PGCM Scale to Assess Views on Ageing More Efficiently: Finding a New Alternative

2020 ◽  
Vol 17 (24) ◽  
pp. 9414
Author(s):  
Tomáš Doseděl ◽  
Tereza Menšíková ◽  
Lucie Vidovićová
Keyword(s):  
Quality Of Life ◽  
Correlation Coefficients ◽  
Later Life ◽  
Subjective Health ◽  
Subjective Age ◽  
Factors Affecting ◽  
Important Quality ◽  
Using Data ◽  
Positive Outlook

The aim of the study is to present a new and efficient way of measuring the quality of life among older populations, with special attention to morale, positive outlook on life and ageing. The measure is based on the Philadelphia Geriatric Center Morale Scale (PGCM), originally consisting of 22 items. The growing numbers and proportions of older people among European populations has increased the need to obtain more reliable data on their needs, values, life experiences and overall quality of life. Using data from six surveys conducted in the Czech Republic, we have formulated a three-item positive outlook on life and ageing (POLA) scale. Our analyses are divided into three steps: (1) constructing the scale and testing its internal consistency; (2) testing the scale’s external validity using mean comparisons and correlation coefficients; and (3) determining the factors affecting a positive outlook on later life, such as gender and education. We have confirmed that the three-item approach to measuring positive outlook on ageing as a part of morale is highly applicable to surveys, producing compelling results in assessing important quality-of-life sub-concepts, such as subjective health, subjective age, and loneliness.

Data resampling: An approach for improving characterization of complex dynamics from noisy interspike intervals

2018 ◽  
Vol 32 (30) ◽  
pp. 1850335
Author(s):  
Olga N. Pavlova ◽  
Alexey N. Pavlov
Keyword(s):  
Point Processes ◽  
Complex Dynamics ◽  
Factors Affecting ◽  
Single Firing ◽  
Stable Estimation ◽  
Computational Errors ◽  
Takens Theorem ◽  
Using Data

Extracting dynamics from point processes produced by different models describing spiking phenomena depends on several factors affecting the quality of reconstruction of nonuniformly sampled dynamical systems. Although its ability is verified by embedding theorems analogous to the Takens theorem for uniformly sampled time series, a limited amount of samples, a low firing rate and the presence of noise can provide significant computational errors and incorrect characterization of the analyzed oscillatory regimes. Here, we discuss how to improve the accuracy of the quantitative evaluation of complex oscillations from point processes using data resampling. This approach provides a more stable estimation of Lyapunov exponents for noisy datasets. The advantages of resampling-based reconstruction are confirmed by the analysis of various spiking mechanisms, including the generation of single firing events and chaotic bursts.

The relationship between diet and the chemical composition of sheep faeces

2003 ◽  
Vol 2003 ◽  
pp. 150-150
Author(s):  
M. Afdal ◽  
D. I. Givens ◽  
C. Rymer ◽  
E. Owen ◽  
F. Mould
Keyword(s):  
Chemical Composition ◽  
Microbial Population ◽  
Evaluation Methods ◽  
Limited Information ◽  
Factors Affecting ◽  
Fermentative Activity ◽  
Using Data ◽  
The Relationship

The use of faecal inoculum in in vitro feed evaluation methods was examined by Balfe (1985). However, there is limited information concerning the chemical composition of faeces and factors affecting this. The chemical composition of faeces may reflect the microbial population and hence its fermentative activity. A knowledge of the faecal composition is essential as this affects the quality of faecal inoculum. The objective of this work was therefore to study the relationships between diet and the chemical composition of faeces using data obtained from sheep.

Research of 3D Printing Modes of Feedstock for Metal Injection Molding

2020 ◽  
Vol 992 ◽  
pp. 461-466
Author(s):  
A.Yu. Korotchenko ◽  
D.E. Khilkov ◽  
M.V. Tverskoy ◽  
A.A. Khilkova
Keyword(s):  
3D Printing ◽  
Injection Molding ◽  
Metal Injection Molding ◽  
Small Scale ◽  
Print Quality ◽  
Scale Production ◽  
Fused Filament Fabrication ◽  
Factors Affecting ◽  
The Cost

In this work, to reduce the cost of production of parts using injection molding metal technology (MIM technology), it is proposed to use additive technologies (AT) for the manufacture of green parts. The use of AT allows us to abandon expensive molds and expand the field of use of the MIM of technology in single and small-scale production. For manufacture of green parts, the technology of manufacturing fused filament (Fused Filament Fabrication – FFF) is offered. The original composition of the metal powder mix (feedstock) and the filament manufacturing modes for 3D printing have been developed for the FFF technology. The cost of filament is much lower than its analogs. The factors affecting the print quality of green part are considered. All factors are divided into two groups depending on the possibility of their change during printing. The research of the influence of the coefficient filament supply on the geometry of green parts during 3D printing is presented.

scholarly journals Meaningful Engagement of Residents With Dementia in Assisted Living: The Role of Direct Care Workers

2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 254-255
Author(s):  
Jennifer Craft Morgan ◽  
Joy Ciofi ◽  
Candace Kemp ◽  
Andrea Hill ◽  
Alexis Bender
Keyword(s):  
Assisted Living ◽  
Daily Practice ◽  
Direct Care ◽  
Direct Care Workers ◽  
Observation Data ◽  
Factors Affecting ◽  
Care Workers ◽  
Meaningful Engagement ◽  
Using Data

Abstract Meaningful engagement has important implications for quality of care for persons living with dementia. Yet, little research has focused on direct care workers’ (DCWs) role in facilitating engagement opportunities for residents in assisted living. Using data from our ongoing NIA-funded study, “Meaningful Engagement and Quality of Life among Assisted Living Residents with Dementia,” we describe DCW approaches to engaging residents and the factors that influence the use and successful application of these approaches. Focal residents (N=33) were followed at four diverse assisted living communities for one year. Data includes care partner interviews (N=100), including 28 DCWs and 1560 hours of field observation data. DCWs interviewed had between 2 months and 12 years’ experience in their current position and were mostly African American and/or immigrant women of color. Findings suggest that DCW-resident interactions are key opportunities to engage residents in a meaningful way and can facilitate positive, trust-based relationships. This analysis elaborates on our previous work identifying four approaches: knowing the person, connecting with and meeting people where they are, being in the moment, and viewing all encounters as opportunities. We identified factors affecting opportunities for, and experiences with, meaningful engagement between residents and DCWs, including community staffing, consistent assignment, scheduling, DCW training and tenure, and community resources. We conclude with implications for practice emphasizing how elaboration of these approaches can inform the development of DCW training, opportunities for career advancement, and integration of approaches consistently into daily practice in an effort to support meaningful engagement of residents living with dementia.

scholarly journals Analisis Pengakuan Nilai Aset dan Kualitas Laporan Keuangan Sebelum dan Sesudah Penerapan Sistem Akuntansi Berbasis Akrual

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Ika Novita ◽  
Rindu Rika Gamayuni ◽  
Farichah Farichah
Keyword(s):  
Test Validity ◽  
Primary Data ◽  
Validity And Reliability ◽  
Tax System ◽  
Factors Affecting ◽  
Normality Test ◽  
Using Data ◽  
System Effectiveness ◽  
Tax Regulation

This research aims to examine the affect of awareness of paying tax towards the willingness of paying tax, the affect of tax regulation knowledge towards the willingness of paying tax, perception of tax system effectiveness towards the willingness of paying tax, percieved benefits by taxpayers towards the willingness of paying tax, the quality of taxpayer services towards the willingness of paying tax. The population in this research are individual taxpayer of MSME’s registered in the Pratama Kedaton and Teluk Betung Tax Office, Bandar Lampung. Sample are drawn with convenience sampling method. Data collected using questionnaire. The data uses in this research are primary data, and analysed using data quality test (validity and reliability test), classical assumption test (normality test, multicolinierity test, heteroscedasticity test), and hypothesis testing with multiple linier analysis. The result shows that there are many factors affecting the willingness of paying tax significantly are the awareness of paying tax and the quality of taxpayers services, and the tax regulation knowledge, perception of tax system effectiveness and the benefits percieved by taxpayers does not significantly affect the willingness of paying tax.

Customer’s satisfaction on service quality at Vietnam Technological and Commercial Joint Stock Bank – An Giang Branch

2020 ◽  
Vol 4 (3) ◽  
pp. First
Author(s):  
Tran Minh Hieu ◽  
Nguyen Duong Ngoc Mai Chi
Keyword(s):  
Customer Satisfaction ◽  
Service Quality ◽  
Test Method ◽  
Quality Of Services ◽  
Factors Affecting ◽  
Factors Influencing ◽  
Alpha Reliability ◽  
Survey Results ◽  
Development Orientation

This study applied SERVQUAL scale of Parasuraman et al to measure factors affecting customer satisfaction on service quality at Vietnam Technological and Commercial Joint Stock Bank - An Giang Branch (Techcombank An Giang). The study was conducted to survey 207 customers who have been using the service at Techcombank An Giang. The survey results were analyzed by the Cronbach's Alpha reliability test method, then used Exploratory factor analysis (EFA) to verify and evaluate the scale of service quality. The results of the regression analysis show that customer's satisfaction about service quality at Techcombank An Giang includes four factors: The factor with the highest level is the Empathy with Beta = 0.253, the second of factor is the Responsibility with Beta = 0.248, ranked third in the influence level is the Tangible with Beta = 0.235, and the lowest impact level is the Reliability with Beta = 0.144. The research also uses statistical methods to describe and test the differences of demographic factors with customer's satisfactionon service quality.The analysis results show that there is no difference between customer's satisfaction on service quality and factors such as gender, age, income, number of transaction banks, regular transaction banks, and time to use the service at Techcombank An Giang. Through the research results, the author would like to propose some ideas to improve the quality of services, thereby attracting new customers and importantly, keeping traditional customers because the development orientation of Techcombank is to take care of old customers to cross sell other products of the bank. The Stud results offer a basis for the branch to identify the factors influencing customer satisfaction on their service quality, thereby having an appropriate strategy to improve customer satisfaction.

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