scholarly journals TECHNOLOGY OF BROACHING – RESEARCH OF THE ROUGHNESS AND MACHINE CAPABILITY

2021 ◽  
Vol 2021 (6) ◽  
pp. 5452-5459
Author(s):  
JOZEF MARTINOVIC ◽  
◽  
JOZEF PETERKA ◽  
Keyword(s):  
Statistical Methods ◽  
Series Production ◽  
Final Shape ◽  
Shaped Surface ◽  
Metal Machining ◽  
The Cost

The work deals with the technology of metal machining with a focus on the technology of broaching the internal shaped surfaces. The design of the drawing tools is a tool with several cutting edges, whereby the final shape of the inner shaped surface is made for one rectilinear movement of the tool. The cost of broaching tools is higher. For these reasons, the broaching technology is suitable for series production. One part of the paper covers the research of the achieved roughness of the internal grooves when changing the cutting environment, an emulsion was used instead of oil. The second part involves the use of statistical methods in the technology of broaching internal contoured surfaces. The research is focused on the machine capability. The results of measuring the accuracy of the tolerated dimension of the inner holes after broaching are used as input values to this statistic.

scholarly journals Penerapan Sertifikasi Aquaculture Stewardship Council (ASC) Terhadap Produk Udang Budidaya (Studi Kasus: Tarakan - Kalimantan Utara)

2018 ◽  
Vol 13 (2) ◽  
pp. 89-110
Author(s):  
Radityo Pramoda ◽  
Hertria Maharani Putri
Keyword(s):  
Statistical Methods ◽  
Environmental Sustainability ◽  
Municipal Government ◽  
Regulatory System ◽  
Policy Recommendations ◽  
Government Regulations ◽  
Illegal Fishing ◽  
Presidential Decree ◽  
The Government ◽  
The Cost

ASC (Aquaculture Stewardship Council) is a label, indicating that a product that has been passed through environmental sustainability and good aquaculture practices. Objectives of this study are to identify ASC standards and national regulations, and to examine the readiness of exporters and shrimp farmers to apply ASC principles in Tarakan. This study utilizes empirical juridical and descriptive statistical methods. Results of the study indicate that: (1) ASC certification has 7 principles, 34 criteria, and 103 indicators; (2) ASC principles are supported by: 5 Laws, 4 Government Regulations, 1 Presidential Decree, 3 Regulations of the Minister of Marine Affairs and Fisheries, and 4 Decrees of the Minister of Marine Affairs and Fisheries; (3) ASC certification requires high cost; (4) in general the level of readiness of exporter and shrimp fishermen still need to be improved; (5) pond land is mostly illegal. The policy recommendations of this research are: (1) the government reorganizes the national regulatory system to avoid overlapping rules and regulatory vacancies; (2) the government provides lobbies and assessors to relieve the cost of certification; (3) the government adopts the ASC principle criteria to improve competitiveness; (4) the government encourages municipal government in Tarakan to immediately resolve the problem of illegal fishing ponds.  Keywords: Application, Cultivation Stewardship Council, Aquaculture Shrimp Products ASC (Aquaculture Stewardship Council) merupakan sebuah label, bahwa produk sudah melalui prosedur keberlanjutan lingkungan dan aspek sosial praktek budidayayang baik. Tujuan penelitian ini adalah mengidentifikasi ketentuan ASC dan regulasi nasional, serta mengkaji kesiapan eksportir maupunpembudidaya Udang menerapkan prinsip ASC di Tarakan.Analisis kajian menggunakan metode yuridis empirisdan statistika deskriptif. Hasil penelitian menunjukkan: (1) sertifikasi ASC memiliki 7 prinsip, 34 kriteria, dan 103 indikator; (2) prinsip ASC didukung: 5 Undang-Undang, 4 Peraturan Pemerintah, 1 Keputusan Presiden, 3 Peraturan Menteri Kelautan dan Perikanan, dan 4 Keputusan Menteri Kelautan dan Perikanan; (3) sertifikasi ASC membutuhkan biaya mahal; (4) secara umum tingkat kesiapan eksportir dan petambak Udang masih perlu ditingkatkan; (5) lahan tambak sebagian besar ilegal. Rekomendasi kebijakan penelitian ini: (1) penataan sistem regulasi nasional untuk menghindari tumpang tindih aturan dan kekosongan pengaturan; (2) pemerintah melakukan lobi atau menyediakan tenaga penilai untuk meringankan biaya sertifikasi; (3)mengadopsi kriteria prinsip ASC untuk meningkatkan daya saing; (4) pemerintah mendorong otoritas daerah Kota Tarakan segera menuntaskan masalah lahan tambak ilegal. Kata Kunci: Penerapan,Aquaculture Stewardship Council, Produk Udang Budidaya

scholarly journals Assessing Specific Vulnerability of Shallow Aquifers to Pesticide Using GIS Tools. Data Needs and Reliability of Index-Overlay Methods: An Application to the San Giuliano Terme Agricultural Area (Pisa, Italy)

Agronomy ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 985
Author(s):  
Rudy Rossetto ◽  
Tiziana Sabbatini ◽  
Nicola Silvestri
Keyword(s):  
Statistical Methods ◽  
Vulnerability Assessment ◽  
Crop Production ◽  
Aquifer Vulnerability ◽  
Agricultural Area ◽  
Environmental Damage ◽  
Index Method ◽  
Vulnerability Index Method ◽  
Index Overlay ◽  
The Cost

Pesticides play a crucial role in regulating crop production by reducing crop losses and increasing crop yield and quality. However, they may threaten surface and groundwater, a phenomenon occurring at global scale, potentially causing environmental damage and prohibition of water use or high treatment costs for drinking water. Assessing spatially-defined aquifer vulnerability to pesticide is then important, as it may allow defining agricultural areas where pesticides should be used following well-defined agronomic practices/limitations. In this study, after a brief review of recent studies on aquifer vulnerability assessment to pesticide, we applied the Vulnerability Index method to the agricultural area of the Municipality of San Giuliano Terme (Pisa, Italy) in order to focus on the data needs and discuss the reliability of this method (as an example of index-overlay methods). The proposed method needs a relatively small number of parameters compared to other more complex ones. Despite a such a small number of parameters, some were not easily available in our case study. Thus, some assumptions were made. This led to vulnerability maps with reduced reliability, no validation with groundwater samples, and little practical use. This means that to produce robust but static vulnerability assessments, large datasets are needed. In turn, the cost of data gathering may be high. The value of these data may, however, be increased, and the cost better justified if the analyses are based on process-based or advanced statistical methods. While the future for vulnerability assessment methods is the use of process-based/advanced statistical methods, index-overlay methods, as a preliminary step for process-based simulation analysis, may still provide initial and relatively quick insights on potential leaching of pesticides. This in turn may support extension services in delivering timely and relevant advices on the use of such pesticides to farmers and owners of plant nurseries and greenhouses.

scholarly journals Statistical Methods in the Study of Changes in the Structure and Elements of the Cost of Electricity Generation

Vestnik NSUEM ◽  
2019 ◽  
pp. 286-303
Author(s):  
V. N. Afanasyev
Keyword(s):  
Statistical Methods ◽  
Electricity Generation ◽  
Causal Analysis ◽  
Cost Structure ◽  
Electricity Production ◽  
Electricity Prices ◽  
Cost Of Electricity ◽  
Economic Entity ◽  
The Russian Federation ◽  
The Cost

The growth of tariffs and prices in the Russian Federation is largely determined by the growth of electricity prices. Need to know why electricity is becoming more expensive. The article presents the analysis of the system of statistical methods used in the study of changes in the structure and elements of the cost of electricity production. Statistical tools are being discussed to identify and measure the factors behind the rise in electricity prices, and to conduct a detailed causal analysis. Special emphasis is placed on statistical technologies used in the study of changes in individual elements and the cost structure as a whole. Special emphasis is placed on statistical technologies used in predicting changes in individual elements and the cost structure as a whole. The main goal of such a forecast is to develop a strategy for the behavior of the economic entity and formulate of its activity plan.

A Framework for Integrating Human Factors in the Early Stages of Ship Design: Application to the Mess Halls of a Surface Combatant

2020 ◽  
Vol 36 (01) ◽  
pp. 1-13
Author(s):  
Gerardo González-Cela ◽  
Roberto Bellas ◽  
Rafael Carreño ◽  
Javier Martínez ◽  
Ramón Touza ◽  
...  
Keyword(s):  
Human Factors ◽  
Statistical Methods ◽  
Multicriteria Decision Making ◽  
Ship Design ◽  
Decision Tool ◽  
Multicriteria Decision ◽  
General Arrangement ◽  
Trade Offs ◽  
Surface Combatant ◽  
The Cost

The new F-110 frigates project is currently in the conceptual design and definition phase. General arrangement has to be defined; there are many demands and proposals of changes. One of them is the design of the most crowded areas, the mess halls. The aim of this article is to provide the Spanish Navy Staff with a decision tool that helps in determining the optimal distribution of the future F-110 mess halls. For this purpose, a new "analytical decision maker" model was designed providing advanced statistical methods and computer pedestrian simulations within multicriteria decision-making framework that allows optimizing conceptual designs. To reduce subjectivity, crew movement simulations and statistical methods were added to the multicriteria decision model, thus creating a less-subjective decision tool. A sensitivity analysis was conducted to check the robustness of results. An integrative decision and design approach are necessary for broad acceptance of human factors adoption within naval architecture design. 1. Introduction 1.1. Ship design and human factors Ship design is a complex challenging process that requires the successful coordination of many different disciplines and that necessarily involves trade-offs between competing interests to achieve a balanced result. Hence, ship designers need to understand the complex interaction between different design drivers and their influence on the final solution, always being aware that the cost of rework may become drastically high if errors are found in the later stages of the design.

E-interaction of business and government: problems and perspectives

2016 ◽  
Vol 11 (3) ◽  
pp. 159-169
Author(s):  
Гуляева ◽  
Valeriya Gulyaeva
Keyword(s):  
Public Administration ◽  
Statistical Methods ◽  
Public Services ◽  
Comprehensive Approach ◽  
Government Services ◽  
Methodological Basis ◽  
Methods Of Analysis ◽  
The Cost ◽  
Essential Problem

The realization of the conception of e-government in Russia is designed to raise the efficiency of public administration. The role of e-government services was evaluated for the small and medium business, and the problems of this method of cooperation were also studied. The methodological basis of the research is the comprehensive approach and the statistical methods of analysis. Special attention is given to identifying the factors which affect the choice of electronic mode of cooperation. There are some conclusions. Subjective factors influence the choice of mode of electronic cooperation very much, so the measures of popularization of e-government services are needed. In addition there is the use of individual elements of e-government that significantly reduces the cost for public services. The essential problem is to use the services of the intermediary organizations.The results of the analysis can assist to the improvement of the effectiveness of realization of e-government conception in Russia.

scholarly journals Cutting tool quality improvement: a case study of electronic parts manufacturer

2020 ◽  
Vol 2 (2) ◽  
pp. 30-36
Author(s):  
Thanatorn Chuenyindee ◽  
Piyaphong Yongphet ◽  
Phongchayont Srisuwan
Keyword(s):  
Statistical Methods ◽  
Manufacturing Industry ◽  
Cutting Tool ◽  
Cutting Tools ◽  
Modern Manufacturing ◽  
Parts Manufacturing ◽  
Electronic Parts ◽  
The Cost

Electronic parts are an important part in the modern manufacturing industry. The purpose of this study was to enhance the quality of cutting tools in electronic parts manufacturing process by utilizing statistical methods. Through these approaches, it was found that the cost of precision boring blade (S2F0409R05F35R10PTD) was significantly decrease from 457 THB to 315 THB, this research can maintain the process capability value (Cpk) at the customer satisfaction level (rather than 1.5) and reduce production cost from 2,104,739 THB per year to 1,598,857 THB per year (5 months payback period). The proposed statistical methods approaches could also be applied to other electronic parts manufacturing industries worldwide.

Author and register as sources of variation

2020 ◽  
Vol 25 (4) ◽  
pp. 461-488
Author(s):  
Václav Cvrček ◽  
Zuzana Laubeová ◽  
David Lukeš ◽  
Petra Poukarová ◽  
Anna Řehořková ◽  
...  
Keyword(s):  
Experimental Design ◽  
Statistical Methods ◽  
Representative Sample ◽  
General Purpose ◽  
Dimensional Model ◽  
Final Shape ◽  
Register Variation ◽  
Factors Influencing ◽  
Sources Of Variation ◽  
Authentic Data

Abstract This paper investigates the contribution of author/idiolect vs. register/type-of-text – as the most salient factors influencing the final shape of a text – towards explaining the variation observed in Czech texts. Since it is almost impossible to explore the effect of these factors on authentic data, we used elicited letters collected in a fully crossed experimental design (representative sample of 200 authors × four elicitation scenarios serving as a proxy to register variation). The variation encompassed by the elicited texts is analyzed through the lens of a general-purpose multi-dimensional model of Czech. Using triangulation via three established statistical methods and one devised for the purpose of this study, we find that register matters a great deal, explaining 1.5 times as much variation overall as idiolect. This should be taken into account when designing research in sociolinguistics or variation studies in general.

Vulcanization: Conventional and Dynamic

1995 ◽  
Vol 68 (3) ◽  
pp. 351-375 ◽  
Author(s):  
Aubert Y. Coran
Keyword(s):  
Thermoplastic Elastomers ◽  
Dynamic Vulcanization ◽  
Capital Utilization ◽  
Final Shape ◽  
Fast Processing ◽  
History Of ◽  
The Cost ◽  
Rapid Processing ◽  
Vulcanization Process ◽  
Rubber Article

Abstract Conventional vulcanization, has a history of over 150 years, during which there have been increasing needs for technology to permit more and more rapid processing before the vulcanization of a rubber article in its final shape. But, at the same time, one desired increased rates of crosslinking after the part was in its final shape, e.g., in a mold. These two objectives are opposed to one another. For fast processing, we would like to increase temperatures to reduce the resistance to flow; but we do not want vulcanization to occur before processing flow is complete. On the other hand, after a rubber article is in its final shape or form, we would like for vulcanization to occur as rapidly as possible. The reasons for these objectives, are to increase capital utilization and to reduce the cost of money. The use of the premature vulcanization inhibitor, CTP, can give improved processing safety without loss of vulcanization throughput. In the case of thermoplastic elastomers prepared by dynamic vulcanization, all of the vulcanization is done rapidly during mixing, before the rubber compound flows into its final shape, e.g., during rapid thermoplastic injection molding (in seconds, not minutes). The dynamic vulcanization process does add cost to the material; however, this is more than offset by the gains in capital utilization. I would be remiss if I did not mention some potential disadvantages associated with the thermoplastic elastomers. One of these is that, at temperatures above the temperatures of flow, there is a great reduction in the usefulness of the properties (the materials can melt). A related disadvantage is that resistance to permanent set at high temperatures may be inadequate. However, the elevated-temperature set resistance of thermoplastic elastomers prepared by dynamic vulcanization is generally better than that of those prepared by other means. Both kinds of vulcanization are important and may continue to be so for another 150, or so, years.

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