Discrete-Event Simulation of the Triangular Relations of the Components of the Working Process of a Dentist Doctor in Endodontic Manipulations

Today in modern dentistry one of the urgent tasks is to increase the level of productivity of the dentist, while maintaining his or her mental and physical health. To find a rational solution to this issue, much attention is paid to ergonomics, which is aimed at protecting the work of doctors, improving the efficiency and quality of their work, creating optimal working conditions for them, ensuring safety and comfort for patients, and developing the latest dental equipment. The purpose of the study is to describe the clinical and experimental forecasting of the influence of ergonomics derivatives of dentists on the result of endodontic manipulations. Materials and methods. The methods, which were used, are targeted research methods, in particular Rapid Entire Body Assessment and Rapid Upper Limb Assessment, software Tecnomatix Jack (Siemens), StatPlusPro for Windows. The subject of research: a sample of 32 dentists (17 male dentists) (53.13%) and 15 female dentists (46.88%), who provide dental care on the basis of the University Dental Clinic, as well as in within other clinical bases of the dental faculty of Uzhhorod National University. Results and discussion. Analyzing the final results of iatrogenic interventions, there is a direct impact of ergonomics, justified by the presence of proven relationships between the integrated quality indicator of dental rehabilitation and procedural-manual-associated components of the treatment process. Non-compliance with the basic principles of ergonomics during various dental manipulations is evidence of changes in the pathological nature of the musculoskeletal system of the dentist, but there is still lack of data on the impact of the above changes on quantitative and qualitative indicators of effectiveness and predictability of treatment. Considerable attention needs to be paid to the analysis of the influence of ergonomic features of dentists' work on the result of endodontic treatment of teeth and their post-endodontic restoration, taking into account the initial complexity of this type of manipulation. As this is significantly influenced by anatomical variations in the structure of the endodontic, limited visualization of the working field, the need to ensure mandatory isolation of the intervention and permanent control over the absence of contamination of endodontic structures during treatment, topographic features of individual teeth (molars, in particular), features and physical characteristics of mechanical (rotational) and manual endodontic instruments. Conclusion. Occurrence of complications arising from endodontic treatment directly affect the prognosis of the dentition as a complex biomechanical system of the dental apparatus in cases of further post-endodontic restoration of teeth by direct or indirect restorations, as well as when using them as supports for future crowns, and also removable and non-removable types of orthopedic structures. In cases of fixation of bridges on endodontically treated teeth, the emergence of iatrogenic-associated complications due to biomechanical and biological properties of the endodontic, is associated with a decrease in the prognosis of success and survival of the entire prosthetic structure as a whole, rather than one independent unit of the tooth. Based on this, predicting the risks associated with the development of errors and complications during endodontic treatment, as well as their minimization through the use of various types of preventive measures remains an important scientific and practical issue not only therapeutic but also orthopedic dentistry

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ПРАГМАТИЧНИЙ ПОТЕНЦІАЛ НАТИВНОЇ РЕКЛАМИ: ФОРМИ, ТРЕНДИ (НА ПРИКЛАДІ НАТИВНОГО КОНТЕНТУ В СОЦІАЛЬНІЙ МЕРЕЖІ FACEBOOK ЩОДО БРЕНДА ФАКУЛЬТЕТУ ЖУРНАЛІСТИКИ ЗНУ)

State and Regions. Series: Social Communications ◽

10.32840/cpu2219-8741/2020.1(41).18 ◽

2020 ◽

pp. 113

Author(s):

V. Kovpak ◽

N. Trotsenko

Keyword(s):

Social Network ◽

Professional Training ◽

Educational Process ◽

Communication Strategy ◽

Student Centered ◽

Teacher Student ◽

The Social ◽

National University ◽

High Level ◽

The Impact

<div>The article analyzes the peculiarities of the format of native advertising in the media space, its pragmatic potential (in particular, on the example of native content in the social network Facebook by the brand of the journalism department of ZNU), highlights the types and trends of native advertising. The following research methods were used to achieve the purpose of intelligence: descriptive (content content, including various examples), comparative (content presentation options) and typological (types, trends of native advertising, in particular, cross-media as an opportunity to submit content in different formats (video, audio, photos, text, infographics, etc.)), content analysis method using Internet services (using Popsters service). And the native code for analytics was the page of the journalism department of Zaporizhzhya National University on the social network Facebook. After all, the brand of the journalism department of Zaporozhye National University in 2019 celebrates its 15th anniversary. The brand vector is its value component and professional training with balanced distribution of theoretical and practical blocks (seven practices), student-centered (democratic interaction and high-level teacher-student dialogue) and integration into Ukrainian and world educational process (participation in grant programs).</div>And advertising on social networks is also a kind of native content, which does not appear in special blocks, and is organically inscribed on one page or another and unobtrusively offers, just remembering the product as if «to the word». Popsters service functionality, which evaluates an account (or linked accounts of one person) for 35 parameters, but the main three areas: reach or influence, or how many users evaluate, comment on the recording; true reach – the number of people affected; network score – an assessment of the audience’s response to the impact, or how far the network information diverges (how many share information on this page).Key words: nativeness, native advertising, branded content, special project, communication strategy.

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INNOVATIVE ARCHITECTURAL IDEAS OF THE FUTURE DWELLINGS

Vìsnik Nacìonalʹnogo unìversitetu "Lʹvìvsʹka polìtehnìka". Serìâ Arhìtektura ◽

10.23939/sa2020.02.067 ◽

2020 ◽

Vol 2 (2) ◽

pp. 67-75

Author(s):

Dzhyhil Yu. ◽

Keyword(s):

Personal Responsibility ◽

Traffic Noise ◽

Modern World ◽

Future Research ◽

Housing Design ◽

Residential Architecture ◽

Planning Decisions ◽

National University ◽

Methodological Principles ◽

The Impact

Residential architecture has one of the most conservative styles based on its specifics. However, today this type of architecture seeks to actively respond to changes in the modern world. These changes are caused by multiple factors, among them are: technological and information progress; lack of resources and environmental pollution; military conflicts and population migration etc. The purpose of this article is to summarize the experience of the Department of Architectural Environment of Lviv Polytechnic National University over housing issues and outline the methodological principles of innovation in designing both individual houses and the architectural environment of residential formations. While writing this article, we analyzed the 15-year experience of Architectural Environment's Department diploma projects. The unique feature of these projects is the priority on the design of the environment. The evolution of diploma project topics is revealed on multiple distinctive examples such as the reconstruction of old buildings in Lviv and the construction of prefabricated homes and container-type housing. Futuristic settlements are represented in projects such as “The Ocean Settlements” and “Prykarpatsk - the City of Future”. Research projects were developed to study current trends in housing design and the impact of innovative technologies on planning decisions. These projects discoursed the protection of housing from traffic noise and issues related to environmental preservation. Innovative architectural ideas of future housing, developed by students in these projects, are based on a combination of aesthetic, technical, and social components of architecture. The conclusion indicates that when educating future architects, it is important to teach them the basics of the craft, as well as the ability to defend their innovative ideas. The emphasis is placed on the importance of educating the architect's personal responsibility for their own design solutions. It is stated that professional motivation and the ability to constantly renew previously acquired knowledge and skills will be among the main tasks in training future architects.

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Factors Influencing Academic Stress on Students of University of Economics and Business - Vietnam National University

VNU Journal of Science Economics and Business ◽

10.25073/2588-1108/vnueab.4380 ◽

2020 ◽

Vol 36 (3) ◽

Author(s):

Nham Phong Tuan ◽

Nguyen Ngoc Quy ◽

Nguyen Thi Thanh Huyen ◽

Hong Tra My ◽

Tran Nhu Phu

Keyword(s):

Academic Stress ◽

Stress Factors ◽

Negative Effects ◽

Cross Sectional ◽

Stress Scale ◽

Perceptions And Attitudes ◽

National University ◽

Questionnaire Surveys ◽

The University ◽

The Impact

The objective of this study is to investigate the impact of seven factors causing academic stress on students of University of Economics and Business - Vietnam National University: Lack of leisure time, Academic performance, Fear of failure, Academic overload, Finances, Competition between students, Relationships with university faculty. Based on the results of a practical survey of 185 students who are attending any courses at the University of Economics and Business - Vietnam National University, the study assesses the impact of stress factors on students. The thesis focuses on clarifying the concept of "stress" and the stress level of students, while pointing out its negative effects on students. This study includes two cross-sectional questionnaire surveys. The first survey uses a set of 16 questions to assess students’ perceptions and attitudes based on an instrument to measure academic stress - Educational Stress Scale for Adolescents (ESSA). The second survey aims to test internal consistency, the robustness of the previously established 7-factor structure. Henceforth, the model was brought back and used qualitatively, combined with Cronbach’s Alpha measurement test and EFA discovery factor analysis. This study was conducted from October 2019 to December 2019. From these practical analyzes, several proposals were made for the society, the school and the students themselves.

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Behavioral Law and Economics

10.1093/oso/9780190901349.001.0001 ◽

2018 ◽

Cited By ~ 17

Author(s):

Eyal Zamir ◽

Doron Teichman

Keyword(s):

Economic Analysis ◽

Bounded Rationality ◽

Law And Economics ◽

Empirical Studies ◽

Securities Regulation ◽

Critical Examination ◽

Entire Body ◽

Economic Analysis Of Law ◽

Behavioral Law And Economics ◽

The Impact

In the past few decades, economic analysis of law has been challenged by a growing body of experimental and empirical studies that attest to prevalent and systematic deviations from the assumptions of economic rationality. While the findings on bounded rationality and heuristics and biases were initially perceived as antithetical to standard economic and legal-economic analysis, over time they have been largely integrated into mainstream economic analysis, including economic analysis of law. Moreover, the impact of behavioral insights has long since transcended purely economic analysis of law: in recent years, the behavioral movement has become one of the most influential developments in legal scholarship in general. Behavioral Law and Economics offers a state-of-the-art overview of the field. The book surveys the entire body of psychological research underpinning behavioral analysis of law, and critically evaluates the core methodological questions of this area of research. The book then discusses the fundamental normative questions stemming from the psychological findings on bounded rationality, and explores their implications for establishing the aims of legislation, and the means of attaining them. This is followed by a systematic and critical examination of the contributions of behavioral studies to all major fields of law—property, contracts, consumer protection, torts, corporate, securities regulation, antitrust, administrative, constitutional, international, criminal, and evidence law—as well as to the behavior of key players in the legal arena: litigants and judicial decision-makers.

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Histological, Biomechanical, and Biological Properties of Genipin-Crosslinked Decellularized Peripheral Nerves

International Journal of Molecular Sciences ◽

10.3390/ijms22020674 ◽

2021 ◽

Vol 22 (2) ◽

pp. 674

Author(s):

Óscar Darío García-García ◽

Marwa El Soury ◽

David González-Quevedo ◽

David Sánchez-Porras ◽

Jesús Chato-Astrain ◽

...

Keyword(s):

Ex Vivo ◽

Nerve Repair ◽

Wistar Rat ◽

Biomechanical Properties ◽

Biological Properties ◽

Suitable Alternative ◽

Promising Alternative ◽

Histological Pattern ◽

The Impact

Acellular nerve allografts (ANGs) represent a promising alternative in nerve repair. Our aim is to improve the structural and biomechanical properties of biocompatible Sondell (SD) and Roosens (RS) based ANGs using genipin (GP) as a crosslinker agent ex vivo. The impact of two concentrations of GP (0.10% and 0.25%) on Wistar rat sciatic nerve-derived ANGs was assessed at the histological, biomechanical, and biocompatibility levels. Histology confirmed the differences between SD and RS procedures, but not remarkable changes were induced by GP, which helped to preserve the nerve histological pattern. Tensile test revealed that GP enhanced the biomechanical properties of SD and RS ANGs, being the crosslinked RS ANGs more comparable to the native nerves used as control. The evaluation of the ANGs biocompatibility conducted with adipose-derived mesenchymal stem cells cultured within the ANGs confirmed a high degree of biocompatibility in all ANGs, especially in RS and RS-GP 0.10% ANGs. Finally, this study demonstrates that the use of GP could be an efficient alternative to improve the biomechanical properties of ANGs with a slight impact on the biocompatibility and histological pattern. For these reasons, we hypothesize that our novel crosslinked ANGs could be a suitable alternative for future in vivo preclinical studies.

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Earthworms as an Ecological Indicator of Soil Recovery after Mechanized Logging Operations in Mixed Beech Forests

Forests ◽

10.3390/f12010018 ◽

2020 ◽

Vol 12 (1) ◽

pp. 18

Author(s):

Hadi Sohrabi ◽

Meghdad Jourgholami ◽

Mohammad Jafari ◽

Farzam Tavankar ◽

Rachele Venanzi ◽

...

Keyword(s):

Soil Properties ◽

Soil Depth ◽

Biological Properties ◽

Economic Benefits ◽

Ecological Indicator ◽

Traffic Intensity ◽

Soil Biological Properties ◽

Density And Biomass ◽

Soil Recovery ◽

The Impact

Soil damage caused by logging operations conducted to obtain and maximize economic benefits has been established as having long-term effects on forest soil quality and productivity. However, a comprehensive study of the impact of logging operations on earthworms as a criterion for soil recovery has never been conducted in the Hyrcanian forests of Iran. The aim of this study was to determine the changes in soil biological properties (earthworm density and biomass) and its recovery process under the influence of traffic intensity, slope and soil depth in various intervals according to age after logging operations. Soil properties were compared among abandoned skid trails with different ages (i.e., 3, 10, 20, and 25 years) and an undisturbed area. The results showed that earthworm density and biomass in the high traffic intensity and slope class of 20–30% at the 10–20 cm depth of the soil had the lowest value compared to the other treatments. Twenty-five years after the logging operations, the earthworm density at soil depth of 0–10 and 10–20 cm was 28.4% (0.48 ind. m−2) and 38.6% (0.35 ind. m−2), which were less than those of the undisturbed area, respectively. Meanwhile, the earthworm biomass at a soil depth of 0–10 and 10–20 cm was 30.5% (2.05 mg m−2) and 40.5% (1.54 mg m−2) less than the values of the undisturbed area, respectively. The earthworm density and biomass were positively correlated with total porosity, organic carbon and nitrogen content, while negatively correlated with soil bulk density and C/N ratio. According to the results, 25 years after logging operations, the earthworm density and biomass on the skid trails were recovered, but they were significantly different with the undisturbed area. Therefore, full recovery of soil biological properties (i.e., earthworm density and biomass) takes more than 25 years. The conclusions of our study reveal that the effects of logging operations on soil properties are of great significance, and our understanding of the mechanism of soil change and recovery demand that harvesting operations be extensively and properly implemented.

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Balancing scarce hospital resources during the COVID-19 pandemic using discrete-event simulation

Health Care Management Science ◽

10.1007/s10729-021-09548-2 ◽

2021 ◽

Author(s):

G.J. Melman ◽

A.K. Parlikad ◽

E.A.B. Cameron

Keyword(s):

Resource Allocation ◽

Discrete Event Simulation ◽

Elective Surgery ◽

Discrete Event ◽

Specific Patient ◽

Event Simulation ◽

The Impact ◽

Allocation Decisions ◽

Allocation Strategies ◽

Resource Allocation Decisions

AbstractCOVID-19 has disrupted healthcare operations and resulted in large-scale cancellations of elective surgery. Hospitals throughout the world made life-altering resource allocation decisions and prioritised the care of COVID-19 patients. Without effective models to evaluate resource allocation strategies encompassing COVID-19 and non-COVID-19 care, hospitals face the risk of making sub-optimal local resource allocation decisions. A discrete-event-simulation model is proposed in this paper to describe COVID-19, elective surgery, and emergency surgery patient flows. COVID-19-specific patient flows and a surgical patient flow network were constructed based on data of 475 COVID-19 patients and 28,831 non-COVID-19 patients in Addenbrooke’s hospital in the UK. The model enabled the evaluation of three resource allocation strategies, for two COVID-19 wave scenarios: proactive cancellation of elective surgery, reactive cancellation of elective surgery, and ring-fencing operating theatre capacity. The results suggest that a ring-fencing strategy outperforms the other strategies, regardless of the COVID-19 scenario, in terms of total direct deaths and the number of surgeries performed. However, this does come at the cost of 50% more critical care rejections. In terms of aggregate hospital performance, a reactive cancellation strategy prioritising COVID-19 is no longer favourable if more than 7.3% of elective surgeries can be considered life-saving. Additionally, the model demonstrates the impact of timely hospital preparation and staff availability, on the ability to treat patients during a pandemic. The model can aid hospitals worldwide during pandemics and disasters, to evaluate their resource allocation strategies and identify the effect of redefining the prioritisation of patients.

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Assessing asset monitoring levels for maintenance operations

Journal of Manufacturing Technology Management ◽

10.1108/jmtm-01-2013-0003 ◽

2015 ◽

Vol 26 (5) ◽

pp. 632-659 ◽

Cited By ~ 7

Author(s):

Abdullah A Alabdulkarim ◽

Peter Ball ◽

Ashutosh Tiwari

Keyword(s):

Asset Management ◽

Business Models ◽

Discrete Event ◽

Dynamic Modelling ◽

Simulation Models ◽

Content Type ◽

Event Simulation ◽

Product Service ◽

Asset Monitoring ◽

The Impact

Purpose – Asset management has recently gained significance due to emerging business models such as Product Service Systems where the sale of asset use, rather than the sale of the asset itself, is applied. This leaves the responsibility of the maintenance tasks to fall on the shoulders of the manufacturer/supplier to provide high asset availability. The use of asset monitoring assists in providing high availability but the level of monitoring and maintenance needs to be assessed for cost effectiveness. There is a lack of available tools and understanding of their value in assessing monitoring levels. The paper aims to discuss these issues. Design/methodology/approach – This research aims to develop a dynamic modelling approach using Discrete Event Simulation (DES) to assess such maintenance systems in order to provide a better understanding of the behaviour of complex maintenance operations. Interviews were conducted and literature was analysed to gather modelling requirements. Generic models were created, followed by simulation models, to examine how maintenance operation systems behave regarding different levels of asset monitoring. Findings – This research indicates that DES discerns varying levels of complexity of maintenance operations but that more sophisticated asset monitoring levels will not necessarily result in a higher asset performance. The paper shows that it is possible to assess the impact of monitoring levels as well as make other changes to system operation that may be more or less effective. Practical implications – The proposed tool supports the maintenance operations decision makers to select the appropriate asset monitoring level that suits their operational needs. Originality/value – A novel DES approach was developed to assess asset monitoring levels for maintenance operations. In applying this quantitative approach, it was demonstrated that higher asset monitoring levels do not necessarily result in higher asset availability. The work provides a means of evaluating the constraints in the system that an asset is part of rather than focusing on the asset in isolation.

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Prevalence and risk factors of apical periodontitis in endodontically treated teeth in a selected population of Brazilian adults

Brazilian Dental Journal ◽

10.1590/s0103-64402008000100006 ◽

2008 ◽

Vol 19 (1) ◽

pp. 34-39 ◽

Cited By ~ 34

Author(s):

Carlos Estrela ◽

Cláudio Rodrigues Leles ◽

Augusto César Braz Hollanda ◽

Marcelo Sampaio Moura ◽

Jesus Djalma Pécora

Keyword(s):

Risk Factors ◽

Confidence Intervals ◽

Odds Ratio ◽

Apical Periodontitis ◽

Endodontic Treatment ◽

Technical Quality ◽

Endodontically Treated Teeth ◽

Chi Square ◽

Chi Square Test

The aim of this study was to assess the prevalence and risk factors of apical periodontitis in endodontically treated teeth in a selected population of Brazilian adults. A total of 1,372 periapical radiographs of endodontically treated teeth were analyzed based on the quality of root filling, status of coronal restoration and presence of posts associated with apical periodontitis (AP). Data were analyzed statistically using odds ratio, confidence intervals and chi-square test. The prevalence of AP with adequate endodontic treatment was low (16.5%). This percentage dropped to 12.1% in cases with adequate root filling and adequate coronal restoration. Teeth with adequate endodontic treatment and poor coronal restoration had an AP prevalence of 27.9%. AP increased to 71.7% in teeth with poor endodontic treatment associated with poor coronal restoration. When poor endodontic treatment was combined with adequate coronal restoration, AP prevalence was 61.8%. The prevalence of AP was low when associated with high technical quality of root canal treatment. Poor coronal restoration increased the risk of AP even when endodontic treatment was adequate (OR=2.80; 95%CI=1.87-4.22). The presence of intracanal posts had no influence on AP prevalence.

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