ANALYTICAL ASPECTS OF GRAVITY MIXING DRUM DEVICES

2016 ◽  
Vol 1 (2) ◽  
pp. 40-46
Author(s):  
Терюшков ◽  
Vyacheslav Teryushkov ◽  
Димитриев ◽  
Nikolay Dimitriev ◽  
Коновалов ◽  
...  
Keyword(s):  
Numerical Methods ◽  
Modern Society ◽  
Theoretical Research ◽  
Kinematic Parameters ◽  
Periodic Action ◽  
Existing Structures ◽  
Short Period ◽  
Paddle Mixer ◽  
Variety Mixtures

The research objective is improving the mixing quality of the material and determination of structurally-kinematic parameters drum paddle mixer by means of numerical methods. The basis of modern society is the use of variety mixtures and composite materials on their basis. The preparation of the initial mixtures is carried out as directly by mixers, and in some cases by various devices, including extruders and screw presses. Among such devices drum mixers, dryers, mixers, etc are widely distributed. Their feature is the low intensity of mixing, as well as the ability for a relatively short period of time possible to achieve the uniformity of the mixture. Then the quality of the mixture practically does not change. Attempted use of commercially available cement- mixers of periodic action in order to prepare such a mixture as a feed, showed that their existing structures are subject to further improvement because of the impossibility of achieving zootechnical requirements for the preparation of feed on the basis of the purchase and BPD of their own forage. This requires additional theoretical research. The process of the blade drum interaction with the material operating with periodic mixing is shown. The obtained analytical expressions allow to determine the conditions of mixing of the material by major constructive and kinematic parameters of the lobed mixer drum on the basis of numerical methods.

scholarly journals Damping Cutters with Varying Stiffness

2020 ◽  
Vol 23 (6) ◽  
pp. 45-55
Author(s):  
V. V. Malykhin ◽  
E. I. Yatsun ◽  
S. G. Novikov
Keyword(s):  
Vibration Damping ◽  
Theoretical Research ◽  
Existing Structures ◽  
Labour Intensity ◽  
Operational Characteristics ◽  
Processed Material ◽  
Stiffness Variation ◽  
Goals And Objectives ◽  
Dominant Part

Purpose of research.  Improving surfaces' forming by a blade tool is an up-to-date task. Labour intensity of turning processing is a dominant part of all working. Vibrations during turning work are the result of premature tool wear and increased surface roughness of the parts. New cutter designs are of practical and scientific interest. They can reduce vibrations occurring during cutting, increase their persistence and improve processing quality. The aim and objectives of this proposed structural line of damping cutters with adjustable (controlled) rigidity are improvement of cutting tool structures, which allow to increase its resistance due to vibration damping; creation of efficient technological processes of cutting materials, which improve quality of treatment; improved operational characteristics of cutters.Methods. Existing structures of vibration damping cutters with elastic damping pieces of constant rigidity, in which holder or mandrel with cutting plate is installed, do not have necessary requirements for efficiency of vibration reduction due to impossibility of tool stiffness variation. Besides, there is high labour intensity of cutters preparation for operation and dismantling. Innovative cutter designs with adjustable (controlled) rigidity are presented.Results. The developed line of vibration-quenching cutters with rigidity variation and taking into account disadvantages of existing structures makes it possible to control vibration frequencies of perturbating force and components of a tool system which excludes uncontrolled growth of vibration amplitude and significantly prolongs efficiency of cutters with high quality of processing. It depends on processed material and cutting process modes. Existing and new designs of damping cutters make it possible to classify them. So it is possible to carry out research on their improvement.Conclusion. Proposed damping cutters with varying rigidity meet goals and objectives. According to theoretical research and industrial tests, simplicity of structures and technologies of new damping cutters manufacturing it is possible to implement them into production. 

Significance and Role of Athletes in Ethical Education of Youth

2019 ◽  
Vol 6 (2) ◽  
pp. 62-74
Author(s):  
Ivana Markov Čikić ◽  
Aleksandar Ivanovski
Keyword(s):  
Young People ◽  
Role Models ◽  
Role Model ◽  
Modern Society ◽  
Ethical Education ◽  
Open Issue ◽  
Clear Identification ◽  
Relationship Of

Summary One cannot write about the relationship of young people and current sports stars in modern society without having previously studied the processes of mediation and globalisation of sport, and the transformation of traditional social values. The goal of the science and practice engaged in sports and education of young people is a constant quest for preserving universal ethical values and reconciling them with the modern-day social processes. This paper will present the result of a survey conducted with adolescents in five different Serbian cities in order to find the answer to the question if sportspersons were their favourite television role-models. According to the results of our survey, 45% of adolescents do not have a favourite TV personality and do not know for sure who that could be. Novak Đoković, who would be the choice of adults for a role model of the young, with 63.2% according to the survey conducted by the Ministry of Youth and Sports, scored 3.81% in our survey with adolescents who would chose Novak Đoković as their favourite TV personality. The necessity of raising media literacy of young people with the aim of clear identification of sports role models who are going to improve their quality of life still remains an open issue for further research on this course.

scholarly journals Adaptive Reuse of Distressed Malls for Dementia-Friendly City Centers: Outcomes From Community Focus Groups

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 61-61
Author(s):  
Emily Roberts
Keyword(s):  
Spatial Configuration ◽  
Public Spaces ◽  
Dementia Care ◽  
Model Of Care ◽  
Community Revitalization ◽  
Existing Structures ◽  
Group Outcomes ◽  
Midwestern University ◽  
Memory Care

Abstract It is estimated that 5.4 million Americans have some form of dementia and these numbers are expected to rise in the coming decades, leading to an unprecedented demand for memory care housing and services. In searching for innovative options to create more autonomy and better quality of life in dementia care settings, repurposing existing structures, in particular vacant urban malls, may be one option for the large sites needed for the European model of dementia villages. These settings may become sustainable Dementia Friendly City Centers (DFCC), because in the case of enclosed mall construction, the internal infrastructure is in place for lighting, HVAC, with varied spatial configuration of public spaces. This presentation describes the community engagement research being conducted by a research team at a Midwestern university, laying groundwork for the DFCC model for centralized dementia programs, services and attached housing. Focus group outcomes from four disciplines (caregiver, physician, designer, community development) detailed four principle themes including : community revitalization, building sustainability, urban regreening and the nurturing of innovation to further a culture of dementia care which is inclusive, progressive and convergent with the needs of an aging. The DFCC model can be seen as one opportunity to make life better not only for those with needs associated with dementia now, but also for ourselves in the future, therefore educating and updating future stakeholders about the value of this model of care will be critical in transforming current hurdles into future opportunities.

Death or Declaw: Dealing with Moral Ambiguity in a Veterinary Hospital

2005 ◽  
Vol 13 (4) ◽  
pp. 315-342 ◽  
Author(s):  
Dana Atwood-Harvey
Keyword(s):  
Medical Practice ◽  
Organizational Support ◽  
Theoretical Research ◽  
Best Interest ◽  
Political Debate ◽  
Self Identity ◽  
Staff Members ◽  
Moral Ambiguity ◽  
Veterinary Hospital

AbstractThe medical practice of declawing has received much political debate over the past few years. Yet, empirical and theoretical research on how this practice is maintained and the ethical positions of those who actually participate in this work is lacking. Drawing from 9 months of ethnographic fieldwork in a feline-specific veterinary hospital and open-ended interviews with veterinarians and staff, this study examines veterinary staff members' attitudes toward, and strategies for, dealing with the medical practice of declawing. Specifically, findings show that a number of staff felt uncomfortable with their participation in onychectomy (declawing) and relied heavily on organizational support structures to cope both with these feelings and the moral ambiguity about the practice. Relying on these structures, the veterinarians and their staff are able simultaneously to define felines as subjects worthy of respect for their quality of life, protect their own self-identity as people who work toward the best interest of animals, and paradoxically support action toward felines that they find morally objectionable.

Study on the effective discharge energy mechanism of vertical ultrasonic vibration assisted EDM processing

2021 ◽  
pp. 095440542110285
Author(s):  
Yinghuai Dong ◽  
Guangyan Li ◽  
Yan Wang ◽  
Jianbao Song ◽  
Shuo Yang ◽  
...  
Keyword(s):  
Ultrasonic Vibration ◽  
Theoretical Research ◽  
Discharge Energy ◽  
Movement Path ◽  
Energy Mechanism ◽  
Effective Discharge ◽  
Parameter Matching ◽  
Discharge Gap ◽  
Conventional Machining

Compared to traditional EDM processing, UEDM (Ultrasonic Vibration Assisted EDM) have a great improvement in optimizing discharge environment. In this study, ultrasonic vibration is attached to the electrode. According to the relative positional relationship between the movement path of the electrode tip and the discharge gap, four working states of UEDM are defined. The four working states are the path within the discharge gap, the path in contact with the edge of the discharge gap, part of the electrode end path outside the discharge gap, and the path in contact with the workpiece, respectively. States are analyzed from the effective discharge energy and discharge frequency. A mathematical model for effective discharge energy and surface roughness is established for two conventional working states. The correctness of the theoretical research is verified by experiments. As the experiment results shown, the influence of ultrasonic amplitude on the energy of UEDM is primary, while frequency is secondary. A working state with better discharge stability and higher discharge energy when the electrode end path is in contact with the edge of the discharge gap. In the first three conventional machining states, the surface quality of the workpiece increases with the increase of ultrasonic amplitude and frequency. The study can provide scientific guidance for parameter matching of UEDM.

Risks of the Digitalization of Life of the Population and Ways of Decreasing Them

2021 ◽  
Vol 13 (4-1) ◽  
pp. 180-203
Author(s):  
Elena Stukalenko ◽  
Keyword(s):  
Quality Of Life ◽  
Digital Technologies ◽  
Well Being ◽  
Digital Economy ◽  
Digital Transformation ◽  
Negative Consequences ◽  
Short Period ◽  
The World ◽  
The Impact

Digital technologies, ubiquitous in our daily life, have radically changed the way we work, communicate, and consume in a short period of time. They affect all components of quality of life: well-being, work, health, education, social connections, environmental quality, the ability to participate and govern civil society, and so on. Digital transformation creates both opportunities and serious risks to the well-being of people. Researchers and statistical agencies around the world are facing a major challenge to develop new tools to analyze the impact of digital transformation on the well-being of the population. The risks are very diverse in nature and it is very difficult to identify the key factor. All researchers conclude that secure digital technologies significantly improve the lives of those who have the skills to use them and pose a serious risk of inequality for society, as they introduce a digital divide between those who have the skills to use them and those who do not. In the article, the author examines the risks created by digital technologies for some components of the quality of life (digital component of the quality of life), which are six main components: the digital quality of the population, providing the population with digital benefits, the labor market in the digital economy, the impact of digitalization on the social sphere, state electronic services for the population and the security of information activities. The study was carried out on the basis of the available statistical base and the results of research by scientists from different countries of the world. The risks of the digital economy cannot be ignored when pursuing state social policy. Attention is paid to government regulation aimed at reducing the negative consequences of digitalization through the prism of national, federal projects and other events.

Formation of a Personal-Professional Position as the Basis of Technology Design Career Guidance Practices

2021 ◽  
pp. 64-73
Author(s):  
Valery Ilyich Tarlavsky ◽  
◽  
Marina Viktorovna Shakurova ◽  
Keyword(s):  
Career Guidance ◽  
Modern Society ◽  
Vocational Guidance ◽  
Self Determination ◽  
Theoretical Research ◽  
Family Identity ◽  
A Value ◽  
The Family ◽  
Professional Self ◽  
Research Analysis

The article considers the need for a broad view on the technologization of career guidance practices, the importance of which is increasing due to the spread of early professionalization in modern society. The purpose of the article is to identify and substantiate the semantic foundations for the technologization of vocational guidance practices, determined taking into account the process of forming a personal-professional position in the conditions of early professionalization. Research methodology: systemic personality-developing, subjective and technological approaches; methods of theoretical research (analysis, synthesis, generalization, analogy, interpretation, concretization). Attention is drawn to the essential features of personal-professional positioning, the focus is on the attitude to work, profession, personal and professional self-determination. Semantic supports for the design of vocational guidance technologies are identified and justified: the differentiating basis of the stage of life activity; immersion in accessible roles in the field of professional and labor activity and the formation of a value attitude to them; attention to work, the pattern of work of any profession, the formed attitude to work as a value; professional and labor traditions of the family, related features of family identity and family socio-professional trajectory; definition and implementation of personal and professional prospects; preservation and strengthening of personal-professional position.

Electronic Resources for Online Mathematics Primary Education – Specifics, Types, Quality

2021 ◽  
Vol LXIV (1) ◽  
pp. 62-83
Author(s):  
Lyubka Aleksieva ◽  
Keyword(s):  
Mathematics Education ◽  
Online Education ◽  
Primary School ◽  
Primary Teachers ◽  
Theoretical Research ◽  
Future Research ◽  
Electronic Resources ◽  
Learning Content ◽  
Online Mathematics

This paper presents a theoretical research on electronic resources provided for mathematics education in primary school including online education, which has become ubiquitous as a result of the COVID-19 pandemic. Various aspects and forms of application of e-resources in mathematics education are explored in the literature, but the issue of their quality is less studied. E-resources potential to dynamically illustrate the mathematical learning content is defined as their main advantage, but this potential could be realized only in compliance with the principles of multimedia, as well as the requirements for accessibility, ergonomics and visual design. Therefore, in this study the parameters for the quality of e-resources for mathematics education in primary school are derived and specific criteria and requirements for their quality are proposed. Thus, in addition to providing a basis for future research, this paper could serve to primary teachers as a guide for measuring the quality of e-resources that they select or create for online mathematics education.

A Comparative Study between Conventional and Modified Leishman Stain

2021 ◽  
Vol 8 (2) ◽  
pp. 5-12
Author(s):  
Rizwana Abdul Hye ◽  
Bindiya Gisuthan ◽  
Indira Kariveettil
Keyword(s):  
Conventional Method ◽  
Peripheral Blood ◽  
Cross Sectional Study ◽  
Mean Value ◽  
Health Care Centre ◽  
Cross Sectional ◽  
Modified Method ◽  
Present Cross Sectional Study ◽  
Short Period

Introduction: Leishman stain has been used as the stain of choice for peripheral blood films since many decades .But it has a disadvantage of consuming 15 minutes for the procedure alone thereby increasing the turn around time of peripheral smear reporting. In this study modified Leishman stain was made by adding phenol to conventional Leishman to reduce the staining time to 3 minutes without interfering with the quality of stain. Aim: To study the quality of modified Leishman stain in comparison with conventional preparation on peripheral blood smears. Materials and Methods: The present cross-sectional study was carried out in Central Haematology laboratory of a tertiary health care centre in Southern India. A pilot study was done to determine the ideal ratio of phenol to Leishman powder in preparing modified stain without compromising the staining quality. After obtaining consent, the blood sample was collected in anticoagulated vials. Sample size was calculated to be 85.Two thin wedge smears were prepared from each sample and one was stained with conventional Leishman stain and other with modified Leishman stain. The staining characteristics were assessed and scored by an experienced pathologist in terms of 6 parameters- RBC pattern, nuclear pattern, neutrophil granules, eosinophil granules, platelets and background staining. The grades were 1, 2, 3 & 4 (poor, satisfied, good and excellent). Smears each with grades 2, 3 and 4 were selected for study. The results were analysed by Statistical Package for the Social Sciences (SPSS) software version 16.0. Result: The mean value for the staining quality using conventional method was 4.73 and for modified method was 5.39, and the total score possible is 6. Photomicrograph showed excellent results with modified Leishman stain. Thus from these values we can interpret that modified method gave much more acceptable results than that of conventional method. Conclusion: Unlike the conventional method which requires a total of 15 minutes, to complete the staining process, modified Leishman staining techniques takes only 3 minutes. Blood films can be stained within a short period of time thus aiding in rapid diagnosis and treatment of patients. Keywords: Leishman stain, Modified Leishman stain, Phenol.

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