scholarly journals Multi-Criteria Assessment of Shape Quality in CAD Systems of the Future

2020 ◽  
pp. paper68-1-paper68-16
Author(s):  
Valerijan Muftejev ◽  
Rushan Ziatdinov ◽  
Rifkat Nabiyev
Keyword(s):  
Computer Modelling ◽  
Quality Criteria ◽  
3D Models ◽  
Point Particle ◽  
Engineering Practice ◽  
Cad Systems ◽  
Minimum Number ◽  
Variation Rate ◽  
Object Shapes

Unlike many other works, where authors are usually focused on one or two quality criteria, the current manuscript, which is a generalization of the article [35] published in Russian, offers a multi-criteria approach to the assessment of the shape quality of curves that constitute component parts of the surfaces used for the computer modelling of object shapes in various types of design. Based on the analysis of point particle motion along a curved path, requirements for the quality of functional curves are proposed: a high order of smoothness, a minimum number of curvature extrema, minimization of the maximum value of curvature and its variation rate, minimization of the potential energy of the curve, and aesthetic analysis from the standpoint of the laws of technical aesthetics. The authors do not set themselves the task of giving a simple and precise mathematical definition of such curves. On the contrary, this category can include various curves that meet certain quality criteria, the refinement and addition of which is possible in the near future. Engineering practice shows that quality criteria can change over time, which does not diminish the need to develop multi-criteria methods for assessing the quality of geometric shapes. Technical issues faced during edge rounding in 3D models that affect the quality of industrial design product shape have been reviewed as an example of the imperfection of existing CAD systems.

An experience of performing spirometry by trained general practitioners

2020 ◽  
pp. 34-36
Author(s):  
M. A. Pokhaznikova ◽  
E. A. Andreeva ◽  
O. Yu. Kuznetsova
Keyword(s):  
General Practitioners ◽  
Quality Criteria ◽  
Poor Quality ◽  
Male Gender ◽  
Study Research ◽  
The Poor ◽  
Quality Of Research ◽  
Forced Expiratory Maneuver ◽  
Maximal Effort

The article discusses the experience of teaching and conducting spirometry of general practitioners as part of the RESPECT study (RESearch on the PrEvalence and the diagnosis of COPD and its Tobacco-related aetiology). A total of 33 trained in spirometry general practitioners performed a study of 3119 patients. Quality criteria met 84.1% of spirometric studies. The analysis of the most common mistakes made by doctors during the forced expiratory maneuver is included. The most frequent errors were expiration exhalation of less than 6s (54%), non-maximal effort throughout the test and lack of reproducibility (11.3%). Independent predictors of poor spirogram quality were male gender, obstruction (FEV1 /FVC<0.7), and the center where the study was performed. The number of good-quality spirograms ranged from 96.1% (95% CI 83.2–110.4) to 59.8% (95% CI 49.6–71.4) depending on the center. Subsequently, an analysis of the reasons behind the poor quality of research in individual centers was conducted and the identified shortcomings were eliminated. The poor quality of the spirograms was associated either with the errors of the doctors who undertook the study or with the technical malfunctions of the spirometer.

THE QUALITY OF PUBLIC HOSPITALS IN CAN THO CITY, 2016

2018 ◽  
Vol 8 (6) ◽  
pp. 76-81
Author(s):  
Chu Cao Minh ◽  
Thang Vo Van ◽  
Dat Nguyen Tan ◽  
Hung Vo Thanh
Keyword(s):  
Hospital Medicine ◽  
Secondary Data ◽  
Quality Criterion ◽  
Quality Criteria ◽  
Public Hospitals ◽  
Ministry Of Health ◽  
Cross Sectional ◽  
Significant Difference ◽  
Can Tho City

Background: The criteria set of assessing hospital quality in Vietnam in 2016 was revied from the criteria set in 2013 by the Ministry of Health in order to help hospitals to self-assess towards improvinge quality of hospitals in the international integration context. The study aimed to assess the quality of public hospitals in Can Tho City according to the revised criteria set of the Ministry of Health in 2016 and compare the quality among three hospital ranks (including grade I, grade II, and grade III) via to 5 groups of quality criteria. Methods: A cross-sectional study, using secondary data analysis was applied to assess the service quality of 7 general public hospitals in Can Tho City. Results: The average total score of 7 hospitals is 245 and the average for the criteria of 7 hospitals is 2.99, which is just satisfactory. In the criterion of quality, criterion D and E had the lowest scores compared to the other three groups. There was no statistically significant difference (p = 0.076) among the mean scores for the three hospital categories. Conclusion: The quality of public hospitals in Can Tho city in 2016 only reached moderately good level (2.99). Interventions should be developed to improve the quality of hospitals, with particular emphasis on improving the quality of criteria groups D and E. Key words: Quality, hospital, medicine, health, public, Can Tho

scholarly journals The use of mathematical modelling to analyse the process of mixing waters from different sources in water supply system

2018 ◽  
Vol 59 ◽  
pp. 00025
Author(s):  
Agnieszka Szuster – Janiaczyk ◽  
Rafał Brodziak ◽  
Jędrzej Bylka
Keyword(s):  
Mathematical Modeling ◽  
Water Quality ◽  
Quality Criteria ◽  
Supply System ◽  
Network Control ◽  
Quality Of Water ◽  
Water Mains ◽  
Different Sources ◽  
Mixing Water

One of the processes that significantly determines the quality of water to consumers is the process of mixing water from different sources in the water mains. Put to the network two or more chemically and biologically stable waters may result in the formation of water that will be deprived of these features. This article presents the german guidelines for analysing water quality for mixing waters from different sources, in various proportions. Then performed an analysis of utility the mathematical models,including quality criteria, for use in network control. An IT tool has been developed to manage selected water quality processes using mathematical modeling. The basis for implementing the tool was a network model created in Epanet integrated with the Matlab.

scholarly journals Introducing the integrated, cross-sectional psycho-oncology intervention programme and PIM

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
T Krieger
Keyword(s):  
Quality Criteria ◽  
Assessment Instruments ◽  
Intervention Programme ◽  
Cross Sectional ◽  
Implementation Phase ◽  
Group Participation ◽  
Early Implementation ◽  
Examination Process

Abstract From the literature and experience, we know that the quality of patient information material (PIM) has a direct impact on its utilization and therefore also on the acceptance and success of an intervention. In this brief introduction session (10 minutes), the innovative “integrated, cross-sectional psycho-oncology” (isPO) programme and the context of its implementation will be sketched. In the programmés development phase, isPO specific-PIM was developed and utilized in its early implementation phase. This will be presented to the audience. Next, an overview regarding the general PIM quality criteria: correctness of content, legibility, comprehensibility and usability in detail will be given. Finally, common guidelines, checklists and quality assessment instruments will be presented, and the role of the target group (participation degree) in the development or examination process will be critically worked out.

A Survey of the Present State of Friction Modelling in the Analytical and Numerical Investigation of Brake Noise Generation

1999 ◽  
Author(s):  
Jörg Wallaschek ◽  
Karl-Heinz Hach ◽  
Ulrich Stolz ◽  
Parimal Mody
Keyword(s):  
Friction And Wear ◽  
Numerical Models ◽  
Engineering Practice ◽  
Noise Generation ◽  
Noise And Vibration ◽  
Levels Of Detail ◽  
Key Issues ◽  
Brake Noise ◽  
Automotive Brake

Abstract Noise and vibration have become key issues in the design of automotive braking systems. Efforts to improve present day braking systems must take noise and vibration behaviour into account. Good knowledge of the mechanisms involved in the generation of brake noise has thus become an important competitive factor in the design of automotive brake systems. The present paper summarizes some facts and hypotheses concerning the generation of brake noise. First the different brake noise phenomena are classified. Then several approaches, including models of various levels of detail which have been suggested to explain the root causes of brake noise generation are discussed in detail. It will be pointed out that friction and wear processes at the interface of brake pad and rotor play an important role in the understanding of brake noise generation. Unfortunately, our present day knowledge on these processes is quite limited. Further research of basic processes is still needed to improve the quality of analytical and numerical models of friction and wear processes, before reliable predictions of brake noise generation become possible. Based on a discussion of simple models frequently used in engineering practice, guidelines for further research in tribological modelling of the interface processes in pad/rotor interaction will be formulated.

Expertise of the quality of direct dental restorations in the framework of the competition оf internal doctors

2021 ◽  
Vol 41 (1) ◽  
pp. 10-13
Author(s):  
P. M. Skrypnykov ◽  
◽  
T. P. Skrypnikova ◽  
T. A. Khmil ◽  
K. A. Lazareva ◽  
...  
Keyword(s):  
New Technologies ◽  
Objective Assessment ◽  
Postgraduate Education ◽  
Quality Criteria ◽  
Quality Standards ◽  
Independent Practice ◽  
Material Base ◽  
Dental Restorations ◽  
Restoration Technique

The issue of examination of the quality of direct dental restorations performed within the All-Ukrainian professional competition of interns-dentists “Path to the world of skill’,which is conducted to stimulate interest in knowledge and skills in the application of new technologies and methods of aesthetic restoration at the Department of Postgraduate Education -dentists of the Ukrainian Medical Dental Academy. The importance of competitions in the demonstration of quality standards of the dentist in the restoration technique, formulation, updating and clear definition of quality criteria for restoration, taking into account modern instrumental and material base, is analyzed. The main types of restoration of frontal tooth defects are determined, which are due to sufficient visualization by doctors, the need to be able to choose the color of the material in relation to the color of tooth tissue, form a cavity, make and model restoration material. At each stage of the competition there is a photo registration, which helps the jury to determine the quality of the restoration. The application of the developed criteria creates an opportunity for an objective assessment of restored teeth, as the same results may be perceived quite differently by other specialists. The use of criteria for assessing the quality of work in the preparation of interns for independent practice allows you to analytically understand the main parameters of the appearance of natural tooth tissues, to achieve their self-discovery, motivation to learn, the desire for quality standards.

Application of 3D-printing technologies for production of master-model in engineering industry

2021 ◽  
Vol 0 (9) ◽  
pp. 17-21
Author(s):  
O. A. Dvoryankin ◽  
◽  
N. I. Baurova ◽  
Keyword(s):  
3D Printing ◽  
Layer Thickness ◽  
Ultimate Strength ◽  
3D Models ◽  
Engineering Industry ◽  
Master Model ◽  
Parameter Influence ◽  
Printing Parameter

Analysis of 3D-printing methods used in the molding production to manufacture master-models has been carried out. The technology was selected, which allowed one to make high-precision parts, combining the molding and the 3D-printing. Factors effecting on the quality of 3D-models printed by this technology were analyzed. Experimental studied for determination of the printing parameter influence (layer thickness, filling percentage, printing velocity) on ultimate strength of specimens made of ABS-plastic were carried out.

The building permit – how to standardize traditionally established processes

2019 ◽  
Author(s):  
Judith Ponnewitz ◽  
Hans-Joachim Bargstaedt
Keyword(s):  
Quality Criteria ◽  
Work Processes ◽  
Specific Design ◽  
Building Permit ◽  
Alternative Measures ◽  
Permit Application ◽  
Automated Processes ◽  
Lengthy Process

<p>To get a building permit is a lengthy process involving a series of review and verification phases by the con- sultants and by the authorities and their agents. The work processes are, nowadays, governed by a large de- gree of individualistic work performances.</p><p>In order to facilitate a BIM-based building permit application, which exclusively uses the model and ist data as ist sole base of information, we analyzed traditional processes in the phase of issuing a building permit. This allows to restructure the steps of designing a building according to all required criteria and, step by step, remodel for the application of automated processes.</p><p>The facilitation of authorization processes will lead to checking machines which will already be applied by the consultants. Nevertheless, authorities need a secure way to evaluate the quality of the specific design in every regard.</p><p>For this purpose, we show how to combine different algorithms to check on the quality criteria for a building permit. There are qualitative criteria but also quantitative boundaries and also some nice-to-have items which can be compensated by alternative measures.</p>

scholarly journals Evaluation of Yield and Quality of Three Jackfruit (Artocarpus heterophyllus L.) Genotypes

2016 ◽  
Vol 14 (1) ◽  
pp. 107-111 ◽  
Author(s):  
M H Rahman ◽  
M M Alam Patwary ◽  
H Barua ◽  
S Nahar ◽  
Abu Noman Faruq Ahmmed
Keyword(s):  
Agricultural Research ◽  
Development Program ◽  
Yield Potential ◽  
Research Station ◽  
Maximum Weight ◽  
Yield And Quality ◽  
Maturity Period ◽  
Minimum Number ◽  
Overall Performance

Yield and quality performances of three jackfruit genotypes were studied at the Agricultural Research Station, Bangladesh Agricultural Research Institute, Pahartali, Chittagong during 2013-2014. Age, growth, maturity period, yield potential and also qualitative characteristics were compared among them.  Based on overall performance with respect to bearing potential, maturity period, fruit and bulb characters, the genotypes AHPah-1 have been found promising for table purpose followed by AHPah-2 and AHPah-3. Minimum days (117) to 1st harvest were observed in AHPah-1. The number of fruits per plant was exceedingly higher (73) in AHPah-1 whereas minimum number (41) was found in AHPah-2. Maximum weight (8.40 kg) per fruit was observed in AHPah-2 and minimum was in AHPah-1(3.40 kg).  The highest single fruit length (37.25cm) was found in AHPah-2 and breadth (27.00cm) was produced by AHPah-3. Maximum number of bulbs (116) was produced in AHPah-1, whereas minimum (63.00) was in AHPah-3. Maximum weight of bulbs per fruit (4.24 kg) was produced in AHPah-2. Individual bulb weight was higher (54.42g) in AHPah -2 whereas, the lowest (16.71) was in AHPah-1. Edible portion was higher (69.27%) in AHPah-1 whereas, the lowest (53.43%) was in AHPah-3. The TSS was the highest (21.00%) in AHPah-1. The highest bulb length and breadth was found in AHPah-3. Highest seeds weight (639g) was produced in AHPah-2. Individual seed weight (8.19 g) was higher in AHPah-2. Therefore, the genotypes can be included in the variety development program after comparing with the already BARI released jackfruit variety.The Agriculturists 2016; 14(1) 107-111

scholarly journals A Review of Quality Criteria Supporting Supplier Selection

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Mohammad Abdolshah
Keyword(s):  
Supplier Selection ◽  
Quality Evaluation ◽  
Selection Process ◽  
Quality Criteria ◽  
Loss Functions ◽  
Decision Criteria ◽  
Academic Literature ◽  
Extensive Search ◽  
Novel Method

This paper presents a review of decision criteria reported in the literature for supporting the supplier selection process. The review is based on an extensive search in the academic literature. After a literature review of decision criteria, we discuss the most important criteria: quality. Then different methods and factors for assessing the quality of supplier are discussed. Results showed that all methods and factors mentioned in this paper are not appropriate tools for quality evaluation. Moreover, we propose a novel method (using loss functions) in order to assess the quality of suppliers.

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