Functionally-oriented technology for backing-off of new standard gear-cutting hobs

2022 ◽  
Vol 2022 (1) ◽  
pp. 37-48
Author(s):  
Aleksandr Sandler

The results of scientific research of production technology aimed at identifying predictable errors and ensuring the required quality of processing are presented.

2019 ◽  
Vol 287 ◽  
pp. 05003
Author(s):  
Bogdan Sovilj ◽  
Sandra Sovilj-Nikic ◽  
Juliana Javorova

Hob milling process is one of the most important links in the chain of machining because productivity, final geometrical accuracy and gear cutting are very dependent on it. The quality of the machining of gear serration is one of the conditions for achieving the required quality of the work-piece. In this paper the methodology for the identification of topography of tool teeth and gear serration produced by uncoated and coated model and real hob milling tool is presented.


In construction production, the safety of constructing buildings and structures is achieved by ensuring the required quality as a result of systematic construction control based on the implementation of a complex of technical, economic and organizational measures at all stages of the object's life cycle. The article deals with the actual problem of improving the quality of construction products-buildings and structures in conjunction with the activities of construction control bodies. The article presents the advanced foreign and domestic experience of ensuring the quality control at the construction sites, providing for the prevention of the underlying causes of defects and increasing the interest of the contractors directly. On the basis of the analysis of the current situation with quality control at the construction market, ways to improve its efficiency by developing a unified system of technological implementation of relevant requirements for the quality of construction products, determining the rational number and business load of construction control engineers, as well as the active activities of self-regulatory organizations in this area are offered.


2014 ◽  
Vol 1 ◽  
pp. 1-7
Author(s):  
Daniel Obeng-Ofori

The pressure to publish is a fact of life in academia. Academics are expected to demonstrate that they are active researchersand that their work has been vetted by peers and disseminated in reputable scholarly forums. In practice, however, a numberof critical constraints hamper effective publication of scientific research in most developing countries. These include lackof effective mentoring system, poor facilities and inadequate funding for effective research and heavy workload where toomuch time and effort are spent in teaching, grading, meetings and other non-academic activities. In spite of these seeminglyinsurmountable challenges, with proper planning and commitment, one can still conduct research and publish to advanceones career and exchange of knowledge. The paper discusses the critical guiding principles in scientific writing and publishingin an unfriendly research environment as pertains in most universities in the developing world. The overriding principle isto cultivate the discipline of scientific writing consciously and follow it through religiously. This could be achieved if time isallocated for scientific writing in the scheme of weekly schedule of activities and made to be functional through meticulousplanning and commitment. Equally important is to avoid procedural mistakes in scientific writing. While the quality of theresearch is the single most important factor in determining whether an article will be published, a number of proceduralmistakes can help tip the balance against its publication. It should also be noted that when a manuscript is submitted to ascholarly journal, there are two audiences to satisfy: first the editor and external reviewers, and then the journal’s readers.That first group must be satisfied to create the opportunity to appeal to the second. Thus, familiarity with the style and tone ofthe specific journal is crucial.


Author(s):  
Jorge Daher Nader ◽  
Amelia Patricia Panunzio ◽  
Marlene Hernández Navarro

Research is considered a function aimed at obtaining new knowledge and its application for the solution to problems or questions of a scientific nature, The universities framed in the fulfillment of their social function have a complex task given by training a competent professional who assumes research as part of their training and who learns to ask questions that they are able to solve through scientific research.  Scientific research is an indicator of the quality of processes in the university environment, so it must be increased by virtue of the results of the work carried out by research teachers and students the objective of this work is to know the perception of the teachers of the Faculty of Medical Sciences of the University of Guayaquil about the scientific activity. Objective: to know the perception of the teachers of the Faculty of Medical Sciences of the University of Guayaquil about the scientific activity. Methods: theoretical and empirical level were used, a questionnaire with closed questions aimed at knowing the opinions on the research activity in this institution was applied. Result: that of the sample analyzed 309 (39.3%) said they agreed with the training for the writing of scientific articles. 38.6% said they agree with the training on research projects. Conclusion: that teacher’s research should be enhanced to ensure the formation and development of research skills in students.


2017 ◽  
Vol 14 (4) ◽  
pp. 30-38
Author(s):  
V. G. Isaev ◽  
T. N. Antipova

Basic provisions of the concept and methodology of production of composite materials for the missile and space equipment are offered. The system of the purposes realizing the principle of a priority of the purposes of the customer is offered. The system of evaluation criteria and indicators of quality of composite materials the realizing interrelation of requirements of the customer to quality of material and dependence of ensuring the required quality on the used technologies is developed. It is shown that for ensuring quality of composite materials for units and the RKT systems first of all it is necessary development of mathematical dependences of properties of materials on parameters of the technological modes in the conditions of obligatory implementation of requirements of the customer.


2018 ◽  
Vol 77 (4) ◽  
pp. 211-217 ◽  
Author(s):  
P. N. Pulatov

Current geopolitical and economic conditions for the functioning of railway transport in most post-Soviet states are such that it is extremely difficult to provide required quality of transport services and break-even operations at high expenses for maintaining the railway infrastructure and rolling stock. Dynamics of transportation of the Tajik Railway (TSR) is shown, which displays that most of its sections are classified as low-intensity ones. The paper proposes methodical principles, setting and qualitative analysis of the task of rationalization of operational work and organization of car flows for international transportation, taking into account the specifics of the Tajik Railway. There is a problem of complex maintenance of the efficiency of operational work in modern conditions based on the synthesis of the tasks of self-management (rational internal operational technology of the Tajik Railway) and coordination tasks (technological interaction with railway administrations of other states). Author substantiated the necessity of solving this problem. Proposed classification of technological restrictions and controlled variables in the performance of transport takes into account methods for changing external conditions for the functioning of the railway landfill and methods for increasing internal efficiency of its operation. The search for the solution of the problem involves direct search of variants along its ordered set with clipping of groups of variants that do not correspond to constraints, with the subsequent finding of compromise control over a set of effective alternatives.


Author(s):  
Jeasik Cho

This chapter provides a review of the book, which explores how to conceptually understand and practically evaluate the quality of qualitative research. Despite the fact that there are few scholarly pieces regarding qualitative research, the depth and creativity that the pioneering researchers have demonstrated are profound, and the extent to which they cover not only the broad quality of qualitative research but also most of the specific qualities expected by many different kinds of qualitative research is incredible. This chapter summarizes the major topics of this book. Final remarks on this exciting, creative, but difficult topic are preceded by the following summary: Fortunately, There are commonly agreed, bold standards for evaluating the goodness of qualitative research in the academic research community. These standards are a part of what is generally called “scientific research.”


2012 ◽  
Vol 30 (No. 5) ◽  
pp. 474-482 ◽  
Author(s):  
L. Siříšťová ◽  
Š. Přinosilová ◽  
K. Riddellová ◽  
J. Hajšlová ◽  
K. Melzoch

The production technology of high-quality vodka used in Russia involves filtration through activated charcoal. To approach the quality of renowned Russian vodka, one prominent Czech spirit-producing company installed on its production premises a filtration device including a charcoal column, and launched test runs during which different filtration conditions were tested. Samples collected during the test runs were analysed by GC-FID and GC-MS with the aim to compare their composition; sensory analysis was an integral part of the evaluation. The results documented a positive effect of charcoal filtration on the quality of produced vodka, which was not reduced when higher flow rates were applied.  


2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Changixu Cheng ◽  
Xiaomei Song ◽  
Jing Yang ◽  
Xiatian Hu ◽  
Shi Shen ◽  
...  

This paper addresses a special zone design problem for economic census investigators that is motivated by a real-world application. This paper presented a heuristic multikernel growth approach via Constrained Delaunay Triangulation (CDT). This approach not only solved the barriers problem but also dealt with the polygon data in zoning procedure. In addition, it uses a new heuristic method to speed up the zoning process greatly on the premise of the required quality of zoning. At last, two special instances for economic census were performed, highlighting the performance of this approach.


Author(s):  
L. М. Tatarchuk

The article covers the theoretical statements of resource support of scientific activity of a library. System of information and resource support of scientific research in the National Scientific Agricultural Library of the NAAS (NSAL NAAS) was analyzed. The study justified its influence on the results and quality of scientific research in the context of further modernization of the information and resource base of agricultural science, as well as the importance of creating an effective system of resource support of scientific research. The resources for effective support of scientific research and informing specialists and scientists in the agricultural field were presented. It was determined that the achievement of the expected results can be provided under the condition of formation of the system (mechanism) for management of the institution resource support.


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