scholarly journals Study of the influence of the technological parameters of the air-plasma surface gouging on some quality characteristics in the surface layer

2017 ◽  
Vol 1 (1) ◽  
pp. 105-111
Author(s):  
Aneliya Mitkova Stoyanova ◽  
Tatyana Mechkarova ◽  
Krastin Yordanov
Keyword(s):  
New Technologies ◽  
Quality Parameters ◽  
Quality Characteristics ◽  
Air Plasma ◽  
Technological Parameters ◽  
Plasma Surface ◽  
Use Of Resources ◽  
Structural Grade ◽  
Quality Surface ◽  
Grade Steel

The efficient use of resources on the basis of the development of scientific and technical progress requires widespread implementation of new technologies for processing of metals, such as plas-ma, cathode-ray, detonation and other methods that allow to increase the lifetime of machines operation and reduce the materials and energy consumption throughout production.One of the new highly productive methods for obtaining a high-quality surface is the plasma sur-face processing (gouging) of metals. It is one of the most effective methods for surface pro-cessing applied in modern metal-processing facilities. Unlike other methods for surface pro-cessing this method includes the use of an electric arc and the produced plasma has a tempera-ture which reaches tens of thousands degrees Celsius. At such temperature, not only structural grade steel alloys can be processed, but in-fact all types of metals. The aim of this paper is to investigate the relation between the technological parameters of the process air-plasma surface gouging and the quality characteristics of the obtained surface lay-ers.The relations between technological parameters of the process air-plasma surface gouging of metals and quality parameters were obtained by using rotatable design of experiments and re-gression analyses techniques.

Meat quality and carcass characteristics of Norwegian dairy and Holstein-Friesian cattle

2007 ◽  
Vol 2007 ◽  
pp. 110-110
Author(s):  
R.M. Kirkland ◽  
D.C. Patterson ◽  
B.W. Moss ◽  
T.W.J. Keady ◽  
R.W.J. Steen
Keyword(s):  
Meat Quality ◽  
Production Systems ◽  
Carcass Characteristics ◽  
Quality Parameters ◽  
Quality Characteristics ◽  
Production Data ◽  
Dairy Traits ◽  
Holstein Friesian ◽  
Friesian Cattle ◽  
Norwegian Dairy

Any evaluation of breeds or production systems for beef must consider effects on production, carcass and meat quality characteristics. Holstein-Friesian (HF) cattle are bred for dairy traits only, while Norwegian dairy cattle (NOR) have been selected with some emphasis on beef characteristics. A comparison of production data from bulls of these two breeds has been presented previously (Kirkland et al., 2005). The objective of the present study was to evaluate specific carcass and meat quality parameters of HF and NOR bulls.

Hospital-based health technology assessment in Brazil: current experiences and challenges

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
Patricia Coelho de Soárez ◽  
Vera Lúcia Edais Pepe ◽  
Hillegonda Maria Dutilh Novaes
Keyword(s):  
Health Technology Assessment ◽  
Technology Assessment ◽  
New Technologies ◽  
Regulatory System ◽  
Health Technology ◽  
Regulation System ◽  
Hospital Policy ◽  
National Network ◽  
Unified Health System ◽  
Use Of Resources

Abstract In Brazil, there is no consensus on the concept of hospital-based health technology assessment (HB-HTA). There is great variability in the existing models and difficulty in evaluating their results—whether in respect of clinical decisions, quality of care, and hospital policy and management or in respect of optimizing the use of resources. This study aims to discuss the experiences of HB-HTA, its integration into the regulatory system for the adoption of new technologies into the Brazilian public (SUS) (Unified Health System), and its main challenges. During a workshop, a panel of specialists in HTA and/or HB-HTA was formed, representative of four different perspectives: (i) Health services and health technology assessment units, (ii) Academia, (iii) Secretary of State for Health, and (iv) the Federal SUS sector. This was followed by discussion, a preliminary consensus, contributions from the audience, a plenary session, and a final consensus. HB-HTA is not institutionalized, nor is it part of the regulation system for the adoption of new technologies in the SUS. The main challenges are the difficulties in creating qualified teams, financial support, and sustainability. The work of these bodies in respect of the evaluation of new technologies deserves further studies analyzing the relationship between the pressure for adoption from the hospital team and industry professionals and legal rulings. It is necessary to strengthen HB-HTA culture and implement this policy in hospital management, making assessment bodies a part of managerial and decision-making processes in hospitals, and develop regional collaborative networks and a national network of HTA.

scholarly journals CONSTRUCTION OF AN EFFECTIVE WAREHOUSE SYSTEM OF THE ENTERPRISE IN THE PROCESSING OF AGRICULTURAL CARGO

2021 ◽  
Vol 6 (166) ◽  
pp. 217-226
Author(s):  
O. Pavlenko ◽  
D. Velykodnyi
Keyword(s):  
Performance Indicator ◽  
Optimization Problems ◽  
Economic Effect ◽  
Unit Cost ◽  
Maximum Level ◽  
Technological Parameters ◽  
Goods And Services ◽  
The Third ◽  
Use Of Resources ◽  
The Moment

The article investigates the existing trends and prospects for the development of warehousing services in the system of production and processing of products, which allowed us to form the purpose of the research in this development. The chosen theme is quite topical, because warehousing processes are an integral part of the formation of supply logistics in modern production processes. One of the ways to reduce the cost of goods and services is the efficient use of resources. Ukrainian and foreign scientists have touched many questions concerning the development of the infrastructure component, solutions of optimization problems regarding the process of import-export of goods to the warehouse, but without determining the optimal values ​​of technological parameters of warehousing systems. The technological scheme of operation of the warehouse system of the enterprise LLC "MEGA CRISP» allows to see the whole chain of operations from the moment of arrival of the vehicle with cargo (containers and packaging) to the moment of sending the cargo (finished product) to the recipient; the necessary types of resources involved in these processes are also taken into account. Total costs were chosen as an evaluation indicator of the choice of an efficient supply channel. Relevant parameters of influence are taken into account: intensities of corresponding cargo flows, unit cost of the appropriate work and one hour of work of one worker, time of performance of an appropriate operation, quantity of the involved resources for performance of the appropriate operation and working time of the warehouse during the day. An imitation full-factor experiment was performed, based on the results of which a regression model in linear form with a non-zero coefficient was determined, in which each coefficient indicates the degree of influence of the relevant factor on the performance indicator. The results of determining the economic effect showed that "Variant 2" (increasing the number of workers) is the least expensive, and the level of costs is lower for all series of experiments compared to the basic variant - "Variant 1". The maximum difference is reached in 12217.8 hryvnias at the maximum loading of a warehouse. And when comparing the third and first variants: only at the maximum level of output flow (170 t / h), the third variant will be cheaper by 852.6 hryvnias. The highest level of positive value of the effect among the variants offered is "Variant 2", the level of savings will be 12,217.8 hryvnias per shift.

scholarly journals The Emerging Role of Cold Atmospheric Plasma in Implantology: A Review of the Literature

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1505 ◽  
Author(s):  
Wang Lai Hui ◽  
Vittoria Perrotti ◽  
Flavia Iaculli ◽  
Adriano Piattelli ◽  
Alessandro Quaranta
Keyword(s):  
New Technologies ◽  
Atmospheric Plasma ◽  
Oral Diseases ◽  
Air Plasma ◽  
Review Of The Literature ◽  
Air Abrasion ◽  
Cold Atmospheric Plasma ◽  
Osteoblast Activity

In recent years, cold atmospheric plasma (CAP) technologies have received increasing attention in the field of biomedical applications. The aim of this article is to review the currently available literature to provide an overview of the scientific principles of CAP application, its features, functions, and its applications in systemic and oral diseases, with a specific focus on its potential in implantology. In this narrative review, PubMed, Medline, and Scopus databases were searched using key words like “cold atmospheric plasma”, “argon plasma”, “helium plasma”, “air plasma”, “dental implants”, “implantology”, “peri-implantitis”, “decontamination”. In vitro studies demonstrated CAP’s potential to enhance surface colonization and osteoblast activity and to accelerate mineralization, as well as to determine a clean surface with cell growth comparable to the sterile control on both titanium and zirconia surfaces. The effect of CAP on biofilm removal was revealed in comparative studies to the currently available decontamination modalities (laser, air abrasion, and chlorhexidine). The combination of mechanical treatments and CAP resulted in synergistic antimicrobial effects and surface improvement, indicating that it may play a central role in surface “rejuvenation” and offer a novel approach for the treatment of peri-implantitis. It is noteworthy that the CAP conditioning of implant surfaces leads to an improvement in osseointegration in in vivo animal studies. To the best of our knowledge, this is the first review of the literature providing a summary of the current state of the art of this emerging field in implantology and it could represent a point of reference for basic researchers and clinicians interested in approaching and testing new technologies.

Dry Sliding Wear Behavior of Ni-Cr/Micro-ZrO2 Coated AISI 410 Grade Steel-Final Revision

2015 ◽  
Vol 787 ◽  
pp. 454-459
Author(s):  
K.G. Girisha ◽  
R. Rakesh ◽  
K.C. Anil ◽  
K.V. Sreenivas Rao
Keyword(s):  
Plasma Spray ◽  
Sliding Wear ◽  
Spray Deposition ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Average Particle ◽  
Low Grade ◽  
Air Plasma Spray ◽  
Air Plasma ◽  
Grade Steel

The most common industrial needs of coatings are to improve the surface properties such as, wear resistance, corrosion resistance and thermal conductivity/insulation. The use of expensive high strength materials and super alloys can be mitigated by using low grade materials covered with suitable coatings compatible with the media and service. Air plasma spray deposition method is used to achieve dense coating on substrate. The present research work demonstrates the wear properties of Ni-Cr/Micro-ZrO2 coating prepared through air plasma spray deposition (PSD) method. In this process, ZrO2 particulates of average particle size (10-40µm) were sprayed on Ni-Cr coated AISI 410 grade steel substrate. Distribution of ZrO2 particle was found uniform throughout the coating as revealed from SEM microphotographs. Dry sliding wear tests were performed on Pin-On-Disc Tribometer at room temperature with moderate humidity conditions. Significant improvement in wear performance was observed in Ni-Cr/Micro- ZrO2 coating deposited on steel via PSD which was also evident from worn surface morphology.

The Influence of Laser Beam Technological Parameters on the Polymethyl Methacrylate Surface Quality

2018 ◽  
Vol 919 ◽  
pp. 190-198 ◽  
Author(s):  
Vladimír Pata ◽  
Libuše Sýkorová ◽  
Oldřich Šuba ◽  
Milena Kubišová
Keyword(s):  
Regression Analysis ◽  
Statistical Analysis ◽  
Laser Beam ◽  
Surface Quality ◽  
Polymethyl Methacrylate ◽  
Quality Parameters ◽  
Technological Parameters ◽  
Detailed Statistical Analysis ◽  
Mathematical Relations

The paper is focused on the determination of the course and change of the surface quality parameters obtained by the laser engraving of the material known under commercial name polymethyl methacrylate. The paper aims to find mathematical relations based on regression analysis for amplitudes parameters Ra and Rz. For this purpose, a sample of variable technology parameters will be machined followed by the surface measuring and evaluation using the Talysurf CLI 500 3D Surface Scanner. Thus the data obtained will be subjected to the detailed statistical analysis to check homoscedasticity, the presence of outliers, and multidimensional normality testing.

scholarly journals Quality characteristics of registered cultivars and advanced lines of durum wheats grown in different ecological regions of Turkey

2011 ◽  
Vol 91 (2) ◽  
pp. 261-271 ◽  
Author(s):  
Mehmet Sakin ◽  
Abdulvahit Sayaslan ◽  
Oral Duzdemir ◽  
Ferhat Yuksel
Keyword(s):  
Durum Wheat ◽  
Sodium Dodecyl ◽  
Quality Parameters ◽  
Quality Characteristics ◽  
Wheat Breeding ◽  
Wheat Genotypes ◽  
Ecological Regions ◽  
Yield And Quality ◽  
Sedimentation Volume ◽  
Grain Yield And Quality

Sakin, M. A., Sayaslan, A., Duzdemir, O. and Yuksel, F. 2011. Quality characteristics of registered cultivars and advanced lines of durum wheats grown in different ecological regions of Turkey. Can. J. Plant Sci. 91: 261–271. In this study, pasta-quality-associated characteristics of 25 durum wheat genotypes were investigated. Durum wheat genotypes consisted of 13 advanced experimental lines and 12 registered cultivars that were grown in three different locations of Turkey for 2 yr. Genotype, location, year and their interactions were found to be statistically significant in terms of all investigated quality characteristics. Mean quality parameters for the genotypes varied as follows: yellowberry kernel 1.7–6.1%, pigment content 3.67–8.31 mg kg−1, lipoxygenase (LOX) activity 12.9–27.9 EU g−1, protein content 10.8–11.8% (14% mb), gluten index (GI) 12-61, sodium dodecyl sulphate-sedimentation volume 17.3–28.7 mL, specific sedimentation volume 1.60–2.52 mL. Of the genotypes, 10 contained γ-gliadin 45 and six γ-gliadin 42 proteins. Except for Zenit, none of the registered cultivars and advanced experimental lines investigated in this study were able to meet simultaneously the requirements for high-quality pasta products; yet certain experimental lines prevailing in specific quality characteristics, such as Line-Gdem-2, Line-Gdem-12 and Line-20, may be used for further breeding purposes. The results of this study also imply that grain yield and quality should be taken collectively into consideration in wheat breeding programs.

scholarly journals Wheat grain preparing for production of conserved food “Second course for lunch

2019 ◽  
Vol 48 (2) ◽  
pp. 46-53 ◽  
Author(s):  
Мария Зенькова ◽  
Maria Zenkova ◽  
Александровна Дарья ◽  
Daria Babich
Keyword(s):  
Quality Parameters ◽  
Seed Vigor ◽  
Point Of View ◽  
Raw Material ◽  
Swelling Ratio ◽  
Wheat Grain ◽  
Technological Parameters ◽  
Standard Procedures ◽  
Material Usage ◽  
The Republic

Modern trends which imply maximum using of all caryopsis anatomical parts in people’s diet present a great interest from the point of view of developing a ready-to-eat preserved food “Second Course for Lunch” based on prepared whole grain in a convenient polymer package. The author suggested using the method of preparing wheat grain by means of steeping, parboiling, and adding it in the preserved food as one of the recipe ingredients. The subject of the study was hulless wheat grain harvested in the Republic of Belarus. The author studied grain quality parameters using standard procedures, grain preparation stages, changes in microbial flora during preparation. Besides, parboiling parameters of the prepared grain were determined. Swelling ratio was determined (k = 1.3) for wheat grain steeping in water at 18 ± 2 °C during 30 hours with water changes every 5 hours till humidity reached 44.4 ± 1 %. Seed vigor (92.0–96.2 %) and swelling ratio (k = 1.3) are considered during calculation of raw material usage rate in the production of preserved food. It was determined that during steeping bacterial content rises sufficiently, and that process takes place when steeping period increases. The author optimized the process of sprouted grain parboiling and determined parboiling technological parameters: at 95–98 °C for 20 min. The process of salt solution absorption by grain after processing during storage of preserved food model samples was considered. The author found out that absorption stops after 60 days of storage. Grain swelling ratio is k = 1.12.

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