Preparation of β-Calcium Metaphosphate (β-CMP) Whiskers

2007 ◽  
Vol 330-332 ◽  
pp. 15-18
Author(s):  
Li Liao ◽  
Lin Chen ◽  
Ai Zheng Chen ◽  
Xi Ming Pu ◽  
Yun Qing Kang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Distilled Water ◽  
High Quality ◽  
Aspect Ratios ◽  
Factors Influencing ◽  
Controlled Crystallization ◽  
Optimized Conditions ◽  
Component Time

To increase the mechanical properties of PLA used for fracture inner fixation, β-calcium metaphosphate whiskers were prepared by controlled crystallization in the glass. The factors influencing the morphology of the samples, such as component, time and temperature of crystallization were discussed. Results showed that the high quality of β-calcium metaphosphate whiskers can be obtained by crystallization treating for 36 hours and washing for 48 hours at 80°C distilled water. β-calcium metaphosphate whiskers having high aspect ratios of 20-100 with diameters of 1-5μm were achieved at the optimized conditions.

scholarly journals Factors influencing consumer behaviour in the beer market in the Czech Republic

2021 ◽  
Vol 39 (No. 4) ◽  
pp. 319-328
Author(s):  
Veronika Svatošová ◽  
Petra Kosová ◽  
Zuzana Svobodová
Keyword(s):  
Czech Republic ◽  
Consumer Behaviour ◽  
Influential Factors ◽  
Influential Factor ◽  
High Quality ◽  
The Czech Republic ◽  
Beer Consumption ◽  
Factors Influencing ◽  
Selection Of

The aim of the paper is to identify the factors influencing consumers when beer consumption and when choosing restaurants for beer consumption in the Czech Republic (CR). A partial goal was to compare preferences and factors influencing beer consumers from the Vysočina Region and the South-Moravian Region. The survey included a questionnaire survey, which 408 respondents took part in. The results showed that the most influential factors in the selection of beer for consumers are taste, a high-quality brand, and Czech production. Surprisingly, price was not found to be an influential factor in beer selection but is rather neutral. Factors that influence consumers most when choosing a restaurant for beer consumption were also identified. Consumers are most influenced by the quality of the beer on offer and the environment in which it is consumed.

Influence of selected factors on meat quality from farm-raised and wild fallow deer (Dama dama): a review

2018 ◽  
Vol 98 (3) ◽  
pp. 405-415 ◽  
Author(s):  
Marta Bykowska
Keyword(s):  
New Product ◽  
Fallow Deer ◽  
Housing System ◽  
Wild Animals ◽  
Dama Dama ◽  
Muscle Type ◽  
High Quality ◽  
Factors Influencing ◽  
Slaughter Method

Fallow deer meat (venison) is a new product acquired from farm-raised and wild animals. Nowadays, people are more concerned about their health, and therefore, they search for high quality, “healthy” products. Farming of fallow deer is ecological and friendly to the environment. Animals are kept in pasture conditions which resemble their natural environment. Venison is considered healthy meat, low in fat and cholesterol, and high in protein. The aim of this review was to gather and discuss the available literature on factors influencing the quality of venison such as sex, age, slaughter method and housing system, feeding, hanging method, animal condition, muscle type, and ageing of meat, considering both farm-raised and wild fallow deer.

scholarly journals Performance Assessment of Solid Waste Management following Private Partnership Operations in Lagos State, Nigeria

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Agboje Ifeoma Anestina ◽  
Adeoti Adetola ◽  
Irhivben Bright Odafe
Keyword(s):  
Waste Management ◽  
Solid Waste ◽  
Regulatory Agency ◽  
Solid Waste Management ◽  
High Quality ◽  
Private Partnership ◽  
Factors Influencing ◽  
Private Sector Participation ◽  
Lagos State

The strategy of delivering modern, high quality public services and promoting competition in the waste management sector leads to formation of private sector participation (PSP) to handle solid waste management in Lagos State. The findings depict that quality of service among the PSP operators recorded high success in the high income areas than those of the low and medium income areas. On the average, industry productivity was 6.63 tonnes per day per vehicle. 18 out of 30 companies in the study area were above this average and in meeting increased productivity, year of experience in operations, number of trips made, number of times trucks were serviced, and adhering to regulatory agency requirement were among the factors influencing company’s productivity in the state. The study, therefore, recommends that regulatory agency should be more aggressive in playing its statutory roles of managing the PSP operators.

scholarly journals Competitiveness of private specialist medical entities in the opinion of service recipients

2019 ◽  
Vol 129 (3) ◽  
pp. 78-81
Author(s):  
Wiktoria Dyjas
Keyword(s):  
Waiting Time ◽  
Quality Of Services ◽  
Study Group ◽  
High Quality ◽  
Factors Influencing ◽  
Medical Institutions ◽  
Competitive Prices ◽  
Main Determinants ◽  
Private Specialist

Abstract Introduction. The phenomenon of competitiveness and pressure of competitors that influence private medical institutions lead to the quest for new solutions on managing and defining determinants, which will provide advance of the institution over competing entities Aim. The purpose of the study was to determine factors influencing competitiveness of a medical institution according to the beneficiaries. Material and methods. The study group comprised 127 patients who used the services of private specialised medical institutions. Results and conclusions. The phenomenon of competitiveness in chosen types of medical services was noticed by 69% (88) of beneficiaries. High quality of services 79% (100), short waiting time for appointments 70% (89) and competitive prices 55% (70) are the main determinants of the competitiveness of those institutions.

scholarly journals Factors influencing the quality of low-income housing in Polokwane Municipality South Africa

2021 ◽  
Vol 28 (2) ◽  
pp. 23-52
Author(s):  
Kgashane Stephen Nyakala ◽  
◽  
Sekou Dolly Ramoroka ◽  
Kemlall Ramdass
Keyword(s):  
South Africa ◽  
South African ◽  
Low Income ◽  
High Quality ◽  
Construction Quality ◽  
Housing Projects ◽  
Factors Influencing ◽  
Design Construction ◽  
Low Income Housing

Recent South African and international evidence highlights the broad and lasting impacts of households, particularly those on low income, when unable to afford higher income counterparts to live in apartments, maintained public housing, and other high-quality houses. A broad range of low-income houses recently built in South African local municipalities are reportedly defective, due to poor building and construction quality. This study aims to assess and determine the factors influencing high-quality housing positively impacting on the lives of a significant proportion of low-income housing projects. Reasons for and obstacles to quality design, construction quality and the development of low-income housing projects were identified. To assess the research questions, a quantitative survey (n=103) was carried out, simple random and purposive sampling techniques were used to select contractors who were active in low-income housing projects within the Polokwane Municipality. The quantitative data gathered were analysed using Statistical Package for the Social Sciences (SPSS) to determine a combination of descriptive and non-parametric statistics of the data computing the frequencies, mean scores and standard deviations. Selected results show that poor-quality and low-income housing projects are perceived to be related to the contractors, builders and construction practitioners not complying with the standards, variously because of insufficient training or accountability to public authorities and end users of low-income houses, i.e., the beneficiaries. The respondents were of the view that house builders and local government authorities could use five factors, namely quality standards, management, involvement of people, process design and process, planning and scheduling to assess non-conformance to quality requirements in low-income housing projects in South Africa. The finding of this study provides a platform for improving the quality of housing design, construction projects, sustainability and an opportunity for local and international design and construction professionals to rethink design in the context of low-income housing projects.

Structure Formation of Butt Joints Made of Aluminum Alloys to Ensure the Quality of Mechanical Engineering Products

2021 ◽  
Vol 1022 ◽  
pp. 119-126
Author(s):  
Dinaida M. Sharapova ◽  
Mikhail G. Sharapov ◽  
Nikolay I. Sharonov
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloys ◽  
High Quality ◽  
Butt Joints ◽  
Dissimilar Joints ◽  
Delayed Fracture ◽  
Welding Technology ◽  
Fracture Tests ◽  
Mechanical Properties Testing

The article discusses the problems of ensuring high-quality formation and normative properties of butt joints of the 1560M and 1980T1 (AMg6 and B48) aluminum alloys as applied to engineering. A method is proposed for joining materials by means of EBW using an electron beam sweep. Homogeneous and dissimilar joints have been investigated, heat treatment of joint from the 1980T1 alloy and a dissimilar joint from the 1560M + 1980T1 alloys is recommended. The paper also presents the results of mechanical properties testing, the corrosion resistance and the delayed fracture tests. A welding technology that makes it possible to obtain high-quality butt-welded joints from aluminum alloys in thicknesses up to 40 mm has been developed and implemented.

A New Approach of Strip Steel Tempering and Straightening in Strip Rolling

2014 ◽  
Vol 1004-1005 ◽  
pp. 1216-1220
Author(s):  
Ji Lai Yu ◽  
Ting Quan Gu ◽  
Jian Guo Wang
Keyword(s):  
Mechanical Properties ◽  
Cold Rolling ◽  
Steel Industry ◽  
Wave Surface ◽  
Strip Rolling ◽  
High Quality ◽  
New Approach ◽  
Strip Steel ◽  
The Cost

This paper firstly analyzes the problems that exist in the cold rolling of steel industry. Secondly, a new approach is proposed to temper and straighten the strip steel based on the temper leveling mill, shortly, TLM. The required high quality of the wave, surface and mechanical properties can be achieved only with TLM. TLM holds the functions of both temper machine and straightening mill and can produce good quality strip steel, no only the waviness, mechanical properties, but also the surface quality. The usage of TLM can lower the cost of the production of tempering, straightening and equipment investment.Finally, the experiments are done and verify the validity of the approach.

Analysis of Changes in the Surface Quality of a UD Prepregs Composite due to Mechanical Loading

2015 ◽  
Vol 818 ◽  
pp. 109-112 ◽  
Author(s):  
Michal Petrů ◽  
Martina Syrovátková ◽  
Tomáš Martinec ◽  
Petr Lepšík
Keyword(s):  
Mechanical Properties ◽  
Stress Test ◽  
Mechanical Resistance ◽  
Reinforced Composites ◽  
Carbon Fibres ◽  
High Quality ◽  
The Individual ◽  
Very High ◽  
Properties Of Composites

Optimizing the mechanical properties of composites is very important for light low energy constructions. Unidirectional prepreg (UD prepreg) is an intermediate product synthesizing a unidirectional layer of carbon fibres with a matrix. This can be used in the production of continuous fibres of reinforced composites. The individual layers can be stacked on top of each other to precisely orientate the layers and attain the maximum properties in a given direction. The resulting composite is ultra thin with the highest possible fraction of fibres. Prepreg composites are very high quality and have very good mechanical properties. They can be applied in sectors where the requirements for mechanical resistance are very high. This paper presents an experimental and numerical analysis of the surface of a composite and the changes that may occur to it under the influence of loading. The Ball Drop Test (ASTM D6024-07 / DIN 52306) was used as a stress test. Test samples scanned by image analysis showed that the surface properties of the UD prepreg were not disrupted, while scanning with AXIO IMAGER M2 showed apparent surface disruptions. From the numerical simulations it was determined that a directional orientation of the fibres of +45°/0°/-45° significantly affects their elastic properties.

Mechanical Properties of Railway Wheel for Standard Reinforcement

2007 ◽  
Vol 26-28 ◽  
pp. 1247-1250
Author(s):  
Seok Jin Kwon ◽  
Dong Hyung Lee ◽  
Jung Won Seo ◽  
Hyun Mu Hur
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Impact Energy ◽  
Threshold Stress ◽  
Maintenance Cost ◽  
Thermal Crack ◽  
High Quality ◽  
Railway Wheel ◽  
Mechanics Characteristics

For the high quality of wheel, the railway wheel has standardized such as UIC, KS, and JIS code but the chemical composition, the mechanical property and the hardness is merely requested. Although the standard of railway wheel has sustained, the damages of railway wheel have been occurred in service running. Because of wheel damage with spalling, shelling and thermal crack, the maintenance cost for the railway wheel has increased. In order to reduce wheel damage, it is necessary to reinforce the standard of railway wheel. In present study, the fracture mechanics characteristics of railway wheel such as threshold stress intensive factor, fracture toughness and impact energy depended on temperature have tested. The result shows that the standard of railway wheel has to supplement fracture toughness and impact energy depended on low temperature in order to reduce the wheel damage.

scholarly journals THE DEMAND FOR PROFESSIONAL KNOWLEDGE AS A KEY FACTOR OF THE DEVELOPMENT OF OUTSOURCING OF FINANCIAL AND ACCOUNTING SERVICES IN POLAND

2016 ◽  
Vol 14 (1) ◽  
pp. 19-33 ◽  
Author(s):  
Anna BAGIEŃSKA
Keyword(s):  
Questionnaire Survey ◽  
Professional Knowledge ◽  
Quality Of Services ◽  
Small Enterprises ◽  
High Quality ◽  
Finance Management ◽  
Factors Influencing ◽  
Key Factor ◽  
Tax Accounting

The access to professional knowledge and specialists’ skills is possible for small enterprises thanks to the outsourcing of services. Purpose – The aim is to analyse the reasons for the outsourcing of accounting services and the factors influencing the choice of the accounting office. The specific aim is to evaluate the entrepreneur’s benefits resulting from using the knowledge of the specialists providing outsourcing services. Design/metodology/approach – A questionnaire survey was conducted among 120 entrepreneurs who outsource accounting services in the Podlaskie Region in Poland. Findings – The most important factors influencing the entrepreneur’s cooperation with the accounting office are: high quality of services resulting from the competence of the employees of the office, the range of services offered by the company, advising on finance management, correctness of tax accounting, the possibility of using additional services. Due to high competitiveness, the demand for professional knowledge influences the development of the outsourcing of financial and accounting services to a greater degree than the price of the services offered by the accounting offices.

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