scholarly journals Recovery of the bitumen and asphalt concrete properties with rejuvenator

2021 ◽  
pp. 6-17
Author(s):  
Yan Pyrig ◽  
Andrii Galkin ◽  
Serhii Oksak ◽  
Yaroslav Ilin ◽  
Yana Shyika
Keyword(s):  
Quality Indicators ◽  
Asphalt Concrete ◽  
Road Maintenance ◽  
Adhesion Properties ◽  
Concrete Mixtures ◽  
Road Section ◽  
Standard Quality ◽  
The Impact ◽  
Main Factor

The main factor in the decreasing in the quality of asphalt concrete with time is thehardening of the bituminous binder, which occurs under the influence of high environmentaltemperatures, moisture and oxygen. Considering this, one of the ways to extend the service life ofasphalt pavements isto implement procedures to prevent deterioration of the properties of bituminousbinders, which occurs due to its hardening. To solve the problem of hardening, the use of variousrejuvenators becomes widespread in road maintenance around the world. The aim of the researchwork is to analyze the effect of the domestic rejuvenator Lux «ЕD-L» on the properties of roadbitumen and asphalt concrete made with this binder. The effect of the rejuvenator on the propertiesof bitumen is evaluated in three ways: finding the influence of Lux «ЕD-L» on the properties of theoriginal bitumen; finding the ability to restore the properties of RTFOT-hardened bitumen by addingan additive to the hardened binder; finding the effect on the intensity of hardening by hardening ofbitumen, which includes the Lux «ЕD-L» additive in its composition. In addition, according to thisscheme, it is evaluating the effect of the rejuvenator on asphalt concrete mixtures, which areconditioned according to the method of AASHTO R 30-02. Based on the obtained experimental data,it is found that the modification of the RTFOT-hardened bitumen with Lux «ЕD-L» additive improvesbinder’s properties, which results in the returning of the values of standard quality indicators(penetration, softening point and breaking point temperatures) to the initial level of values quality ofbitumen before hardening. Lux «ЕD-L» additive significantly improves the adhesion properties ofbitumen (both original and aged). Evaluation of the impact of the rejuvenator on the properties ofasphalt mixtures after conditioning confirmed its effectiveness. The properties of asphalt concrete made from mixtures after conditioning, which were treated with the Lux «ЕD-L» additive, accordingto obtained quality indicators is equal to the asphalt concrete with the original bitumen. A field testof the effect of the Lux «ЕD-L» additive on the properties of the asphalt pavement is in process. Theresults of field test will be obtained after 3 and 9 months of operation of the treated road section.

Qualitŕ della vita e invecchiamento della popolazione. Materiali per un'ipotesi alternativa alla questione pensionistica

2009 ◽  
pp. 67-91
Author(s):  
Adele Bianco
Keyword(s):  
Quality Of Life ◽  
Life Quality ◽  
Main Idea ◽  
Living Condition ◽  
Climate And Environmental Change ◽  
Safety And Health ◽  
Positive Ageing ◽  
The Impact ◽  
Main Factor

The topic of this article is quality of life and ageing process specially focused on today young generations and their coming retirement situation. The main idea is that quality of life is increasing, that means longer, safer and better living condition; consequently positive ageing processes mean also reforming retirement sector. The hypothesis carried out in this paper is an alternative one. Despite of the positive trends, we describe how three main factor of nowadays life are, on the contrary, turning into worse condition the future of young generations and their coming life situation. Firstly we consider the socio-economic aspects, the impact on health and the implications connected with precarious work. Secondly we consider pollution and its effects on health, life quality and life expectation. Thirdly we pay attention about climate and environmental change and their effect on health, life quality and expectation. In conclusion, the retirement future of today young generations may be very different (worse) than expected. The paper in based on WHO, IPCC and European Agency for Safety and Health at Work data and reports.Key words: Young generations; Coming quality of life; Population ageing and future of retirement question.Parole chiave: Giovani generazioni; Qualitŕ della vita; Invecchiamento della popolazione e pensioni.

scholarly journals Study of a Context Quality Model for UbiPri Middleware

2020 ◽  
Author(s):  
Diandre de Paula ◽  
Daniel Saraiva ◽  
Romeiro Natália ◽  
Nuno Garcia ◽  
Valderi Leithardt
Keyword(s):  
Quality Indicators ◽  
Data Privacy ◽  
Context Information ◽  
Adaptation Process ◽  
Context Aware ◽  
Quality Model ◽  
Context Aware Computing ◽  
Quality Of Context ◽  
The Impact

With the growth of ubiquitous computing, context-aware computing-based applications are increasingly emerging, and these applications demonstrate the impact that context has on the adaptation process. From the context, it will be possible to adapt the application according to the requirements and needs of its users. Therefore, the quality of the context information must be guaranteed so that the application does not have an incorrect or unexpected adaptation process. But like any given data, there is the possibility of inaccuracy and/or uncertainty and so Quality of Context (QoC) plays a key role in ensuring the quality of context information and optimizing the adaptation process. To guarantee the Quality of Context it is necessary to study a quality model to be created, which will have the important function of evaluating the context information. Thus, it is necessary to ensure that the parameters and quality indicators to be used and evaluated are the most appropriate for a given type of application. This paper aims to study a context quality model for the UbiPri middleware, defining its quality indicators to ensure its proper functioning in the process of adaptation in granting access to ubiquitous environments. Keywords: QoC, Model, Context-Aware, Data, Privacy

The impact of leadership churn on quality management in Australian hospitals

2019 ◽  
Vol 33 (7/8) ◽  
pp. 809-820
Author(s):  
Sandra Leggat ◽  
Cathy Balding
Keyword(s):  
Quality Of Care ◽  
Quality Management ◽  
Quality Indicators ◽  
Health Sector ◽  
Quality System ◽  
Board Members ◽  
Governing Board ◽  
Content Type ◽  
The Impact

Purpose The purpose of this paper is to explore the relationship between frequent turnover (churn) of the chief executive officer (CEO), quality manager and members of the governing board with the management of quality in eight Australian hospitals. Design/methodology/approach A mixed method three-year longitudinal study was conducted using validated quality system scales, quality indicators and focus groups involving over 800 board members, managers and clinical staff. Findings There were unexpected high levels of both governance and management churn over the three years. Churn among CEOs and quality managers was negatively associated with compliance in aspects of the quality system used to plan, monitor and improve quality of care. There was no relationship with the quality of care indicators. Staff identified lack of vision and changing priorities with high levels of churn, which they described as confusing and demotivating. There was no relationship with quality processes or quality indicators detected for churn among governing board members. Practical implications Governing boards must recognise the risks associated with management change and minimise these risks with robust clinical governance processes. Originality/value This research is the first that we are aware of that identifies the impact of frequent leadership turnover in the health sector on quality management.

scholarly journals Endoscopy assistants influence the quality of colonoscopy

Endoscopy ◽  
2018 ◽  
Vol 50 (09) ◽  
pp. 871-877
Author(s):  
Øyvind Holme ◽  
Ina Pedersen ◽  
Asle Medhus ◽  
Lars Aabakken ◽  
Tom Glomsaker ◽  
...  
Keyword(s):  
Quality Indicators ◽  
Exploratory Study ◽  
Polyp Detection ◽  
Logistic Regression Models ◽  
Patient Dissatisfaction ◽  
Lifetime Experience ◽  
Polyp Detection Rate ◽  
Colonoscopy Quality ◽  
The Impact

Abstract Background Colonoscopy performance varies between endoscopists, but little is known about the impact of endoscopy assistants on key performance indicators. We used a large prospective colonoscopy quality database to perform an exploratory study to evaluate differences in selected quality indicators between endoscopy assistants. Methods All colonoscopies reported to the Norwegian colonoscopy quality assurance register Gastronet can be used to trace individual endoscopy assistants. We analyzed key quality indicators (cecum intubation rate, polyp detection rate, colonoscopies rated as severely painful, colonoscopies with sedation or analgesia, and satisfaction with information) for colonoscopies performed between 1 January 2013 and 31 December 2014. Differences between individual assistants were analyzed by fitting multivariable logistic regression models, with the best performing assistant at each participating hospital as reference. All models were adjusted for the endoscopist. Results 63 endoscopy assistants from 12 hospitals assisted in 15 365 colonoscopies. Compared with their top performing peers from the same hospital, one assistant was associated with cecum intubation failure, four with poor polyp detection, nine with painful colonoscopy, 16 with administration of sedation or analgesics during colonoscopy, and three with patient dissatisfaction about information given relating to the colonoscopy. The number of procedures during the study period or lifetime experience as an endoscopy assistant were not associated with any quality indicator. Conclusion In this exploratory study, there was little variation on important colonoscopy quality indicators between endoscopy assistants. However, there were differences among assistants that may be clinically important. Endoscopy assistants should be subject to quality surveillance similarly to endoscopists.

Methodology for managing quality indicators of hardware products with elements of robust design

2020 ◽  
pp. 38-43
Author(s):  
K. G. Pivovarova ◽  
◽  
A. G. Korchunov ◽  
Keyword(s):  
Product Quality ◽  
Quality Indicators ◽  
Robust Design ◽  
Control Method ◽  
Efficient Production ◽  
Related Quality ◽  
Definition Of ◽  
Noise Factors ◽  
The Impact

Production of metalware is characterized with a great variety of shapes and sizes, originality of each product and a multiple-stage process. Various techniques used to process steel sections (such as cold and hot forming, machining, heat treatment, etc.) make it significantly more difficult to tackle product quality problems. Modern product quality management methodologies are based on a wide use of economical, organizational, technical and other methods. This paper describes a production-related quality control method involving certain elements of robust design. This method is based on the definition of noise factors and control parameters, as well as the conduction of noise and principal experiments. The noise experiment will help estimate the impact of disturbing factors (environmental or industrial) on product quality indicators, whereas the principal experiment will help identify the optimum production mode that can deliver the best quality and, at the same time, minimize the production losses. Robust design techniques can be effectively utilized to control the quality of metalware when developing new and optimizing the existing processes. The paper gives an example of how the quality of S10S steel bars can be controlled through the application of efficient production modes enabling to minimize quality-related costs.

Using a disease pathway management approach to improve the quality of breast cancer care in Ontario.

2016 ◽  
Vol 34 (7_suppl) ◽  
pp. 109-109
Author(s):  
Andrea Eisen ◽  
Jasmin Soobrian ◽  
Ashley Tyrrell ◽  
Clement Li ◽  
Derek Muradali ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Quality Of Care ◽  
Performance Measurement ◽  
Quality Indicators ◽  
Cancer Care ◽  
Evidence Based ◽  
Breast Cancer Care ◽  
Patient Journey ◽  
The Impact

109 Background: Disease Pathway Management (DPM) is used by Cancer Care Ontario (CCO) to set priorities for cancer control, plan cancer services, and improve the quality of care in Ontario by promoting standardization. The DPM approach applies a framework to examine the performance of the entire system from prevention to end of life care, and to identify any gaps within the system. In 2014, DPM began its breast cancer pathway initiative by mapping the patient journey, depicting evidence-based best practice along the breast cancer care continuum, identifying where further guidance is needed for clinical decision making, and identifying gaps in quality of care and performance measurement indicators. Objective: To evaluate the impact of DPM on quality assessment of breast cancer care in Ontario. Methods: DPM convened a multidisciplinary breast cancer working group (WG) of 40 experts from across Ontario. The WG held 12 meetings and used guidelines developed by CCO’s Program in Evidence Based Care (or other sources as needed) to generate pathways for the prevention, screening and diagnosis, treatment, and follow-up care for breast cancer. The pathways were used as a framework to review the existing inventory of provincial breast cancer quality indicators, and to identify areas where evidence based guidance is needed. The pathways were subjected to an extensive review process before publication. Results: The expert WG identified 28 priority areas, including opportunities to develop guidance in areas where it is lacking (e.g. role of perioperative breast MRI; indications for contralateral prophylactic mastectomy) and system barriers that may hinder optimal care (e.g. biomarker assessment). The WG also used the pathways as a framework for evaluating performance measurement indicators by mapping 48 existing quality indicators for breast cancer to the pathway. Conclusions: The CCO DPM Breast Cancer pathways facilitated a province-wide, multidisciplinary process to promote quality standards, to identify gaps and overlaps in performance and quality measurement, and to recommend additional indicators more relevant to the quality of breast cancer care in Ontario.

scholarly journals The Impact of Stress Stability on Job Satisfaction and the Quality of Human Capital

2017 ◽  
Vol 6 (5) ◽  
pp. 333 ◽  
Author(s):  
Irina A. Rudaleva ◽  
Askar N. Mustafin
Keyword(s):  
Job Satisfaction ◽  
Psychological State ◽  
Negative Consequences ◽  
Professional Stress ◽  
Time Period ◽  
Bank Employees ◽  
Short Time ◽  
The Impact ◽  
Main Factor

<p>Long professional stress has a significant impact on the psychological state of employees that inevitably affects the activities of any organization. Therefore, at present, more and more attention is being paid to minimize the negative consequences of stressful staff conditions, with the help of specific procedures of stress management. In this paper, we investigated the impact of stress, the types of stress-resistance of staff individual, and the influence of stress on the degree of job satisfaction of bank employees. The study concludes that the following factors affect the level of job satisfaction of bank employees: wage satisfaction, the level of stress at the workplace, and the relationships in the team. The main factor of the bank employees stress is a large amount of work and a short time period for doing the work. </p>

scholarly journals Water quality and management in the Australian pig industry

2021 ◽  
Vol 61 (7) ◽  
pp. 637
Author(s):  
Louise Edwards ◽  
Helen Crabb
Keyword(s):  
Water Quality ◽  
Management Practices ◽  
Production Systems ◽  
Water Source ◽  
Quality Parameters ◽  
Quality Of Water ◽  
Standard Quality ◽  
Pig Performance ◽  
The Impact

Context Water is the first nutrient and an essential component of all agricultural production systems. Despite its importance there has been limited research on water, and in particular, the impact of its availability, management and quality on production systems. Aims This research sought to describe the management and quality of water used within the Australian pig industry. Specifically, the water sources utilised, how water was managed and to evaluate water quality at both the source and the point of delivery to the pig. Methods Fifty-seven commercial piggeries across Australia participated in this study by completing a written survey on water management. In addition, survey participants undertook physical farm parameter measurements including collecting water samples. Each water sample was tested for standard quality parameters including pH, hardness, heavy metals and microbiological status. Key results Responses were received from 57 farms, estimated to represent at least 22% of ‘large’ pig herds. Bore water was the most common water source being utilised within the farms surveyed. Management practices and infrastructure delivering water from the source to the point of consumption were found to differ across the farms surveyed. Furthermore, water was regularly used as a delivery mechanism for soluble additives such as antibiotics. The quality of water at the source and point of consumption was found to be highly variable with many parameters, particularly pH, hardness, salinity, iron, manganese and microbiological levels, exceeding the acceptable standard. Conclusions In general, water quality did not appear to be routinely monitored or managed. As a result, farm managers had poor visibility of the potential negative impacts that inferior water quality or management may be having on pig production and in turn the economics of their business. Indeed, inferior water quality may impact the delivery of antibiotics and in turn undermine the industry’s antimicrobial stewardship efforts. Implications The study findings suggest that water quality represents a significant challenge to the Australian pig industry. Access to drinking water of an acceptable quality is essential for optimal pig performance, health and welfare but also to ensure farm to fork supply chain integrity, traceability and food safety.

scholarly journals The Role of Social Networks as a Tool for an Effective Recruitment Process in the Enterprises in Kosovo

2021 ◽  
Vol 8 (3) ◽  
pp. 384-388
Author(s):  
Blerim Dragusha ◽  
Vlora Prenaj
Keyword(s):  
Social Networks ◽  
Processing Speed ◽  
Low Cost ◽  
Competitive Advantages ◽  
Recruitment Process ◽  
Quality Of Information ◽  
The Impact ◽  
Main Factor

This paper focuses on the determinants of the impact of social networks on the recruitment process in Kosovar enterprises, concluding that the main factor of that impact is the quality of information, cost benefits, and timeliness. Another factor of particular importance is the competitive advantages social networks provide with respect to efficiently attracting suitable candidates to recruit through their unified data processing speed. The managers interviewed in this study provided evidence that recruitment using social networks is faster than with traditional methods. Social networks enable firms to quickly and easily access applicants from all over the world easily at a low cost. Social networks provide in-depth discussions to understand the views and opinions of both parties in the recruitment process. The information provided by social networks on the personal and professional life of the potential job candidate makes social networks an important tool for recruitment

IMPROVING THE QUALITY OF REPAIR OF NON-RIGID ROAD SURFACES WITH THE USE OF COLD ASPHALT CONCRETE MIXTURES

2021 ◽  
pp. 62-74
Author(s):  
А. Ф. Зубков ◽  
К. А. Андрианов ◽  
Б. Бехзоди
Keyword(s):  
Layer Thickness ◽  
Asphalt Concrete ◽  
High Quality ◽  
Repair Work ◽  
The Road ◽  
Concrete Mixtures ◽  
Factory Production ◽  
Air Temperatures ◽  
Road Surfaces

Постановка задачи. Необходимо рассмотреть технологию ремонта дорожных покрытий нежесткого типа с применением холодных асфальтобетонных смесей на битумах марок БНД, СГ и МГ. Требуется разработать математическую модель конструкции автомобильной дороги, позволяющую демонстрировать распределение температуры по толщине слоя покрытия в зависимости от конструктивных параметров дороги с учетом теплофизических свойств материалов и температурных условий её эксплуатации. Также надлежит уточнить влияние температуры смеси на предел прочности холодной смеси заводского производства. Следует провести ремонт выбоин покрытия в производственных условиях при пониженных температурах воздуха. Результаты. По результатам моделирования распределения температуры в слое покрытия доказано, что применение холодных асфальтобетонных смесей обеспечивает высокое качество ремонтных работ при температуре воздуха выше 30 °С. Получены данные о зависимости температуры нагрева основания от температуры воздуха и толщины слоя, которая обеспечивает температурные режимы холодной смеси при её уплотнении. Установлено, что предел прочности покрытия зависит от температуры. Максимальная величина предела прочности холодного асфальтобетона заводского производства обеспечивается при температуре уплотнения смеси 50-55 °С. Проведенный ремонт выбоин дорожного покрытия при пониженных температурах воздуха доказал возможность выполнения ремонтных работ с высоким качеством в данных производственных условиях. Выводы. Доказана эффективность нагрева основания выбоины перед укладкой холодной асфальтобетонной смеси при ремонте дорожных покрытий нежесткого типа со снижением температуры воздуха ниже 5 °С. Установлено влияние температуры основания покрытия на ее равномерное распределение в зависимости от температуры воздуха и толщины слоя покрытия при выполнении ремонтных работ. Полученные данные о зависимости предела прочности холодного асфальтобетона заводского производства от температуры воздуха позволяет определять параметры уплотняющих машин, обеспечивающих высокое качество ремонтных работ. Statement of the problem. It is essential to consider the technology of repair of road surfaces of non-rigid type using cold asphalt-concrete mixtures on bitumen grades BND, SG and MG. It is important to develop a mathematical model of the road structure that enables modeling the temperature distribution over the layer thickness, depending on the design parameters of the road considering the thermal and physical properties of materials and the temperature conditions of the road operation. It is also necessary to specify the effect of the mixture temperature on the tensile strength of the cold mixture of factory production. Potholes of the coating must be repaired at low air temperatures of different repair technologies in production conditions. Results. Based on the results of modeling the temperature distribution in the coating layer, it is proven that the use of cold asphalt-concrete mixtures ensures high quality of repair work at air temperatures above +30 ° C. The dependence of the heating temperature of the base on the air temperature and the layer thickness is obtained, which provides the temperature conditions of the cold mixture during compaction. It is established that the ultimate strength depends on temperature. The maximum value of the strength limit of cold asphalt concrete of factory production is provided at the compaction temperature of the mixture at +50-55⁰C. The repair of potholes of the road surface carried out in production conditions at low air temperatures proved the ability to perform repair work with high quality of work. Conclusions. It is proven that it is effective to heat the base of the pothole during repair on non-rigid road surfaces at low air temperatures before laying a cold asphalt-concrete mixture. The influence of the base temperature on its distribution over the layer thickness depending on the air temperature and the layer thickness during repair work is established. The obtained dependence of the strength limit of cold asphalt concrete of factory production on temperature allows us to determine the parameters of compacting machines that ensure high quality of repair work.

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