COMPARATIVE ANALYSIS OF THE ENERGY CONSUMED BY NEEDLE BAR MECHANISM AND THE MECHANISM DRIVING THE FEED DOG OF A TOP DRIVE SEWING MACHINE

The paper focuses on the energy consumed by two mechanisms of sewing machine for straight lockstitch (stitch line 301): needle driving mechanism and the transporting mechanism. The first mechanism - needle driving, is a simple structure, but it is the most dynamic one. The second – to moving the fabrics, is the most complicated mechanism of the sewing machine. A comparative analysis of the energy consumed by the two mechanisms for the implementation of their propulsion is made. The correct work of the machine, the seam quality and the quality of the entire sewing product depend to a large extent, on the workings of these two mechanisms. The needle is driven by a slider-crank mechanism, while for the movement of the connected details, at the distance one step is done by a working part – a feed dog. It is attached to a carrier and its trajectory is a closed planar curve, close to the ellipse. The feed dog receives the horizontal and vertical component of its motion from two conditionally separate kinematic chains that have a common drive.The aim is analytical research and comparative analysis of the energies of needle bar mechanism and a mechanism driving the feed dog of the sewing machine. The energy consumed by each of the links of chains, of the chains themselves and total energy consumed by each of the two mechanisms for a full turn of the main shaft of the machine was studied. A comparative analysis of the energies and their distribution was carried out during the working process and the free movement of each of them. The results of the comparative analysis are presented in graphs and diagrams. It can be seen that the energy consumed by the needle mechanism is significantly greater than that of the transport mechanism. This fact is due to the much higher speeds of the links of the first one.The paper focuses on the energy consumed by two mechanisms of sewing machine for straight lockstitch (stitch line 301): needle driving mechanism and the transporting mechanism. The first mechanism - needle driving, is a simple structure, but it is the most dynamic one. The second – to moving the fabrics, is the most complicated mechanism of the sewing machine. A comparative analysis of the energy consumed by the two mechanisms for the implementation of their propulsion is made. The correct work of the machine, the seam quality and the quality of the entire sewing product depend to a large extent, on the workings of these two mechanisms. The needle is driven by a slider-crank mechanism, while for the movement of the connected details, at the distance one step is done by a working part – a feed dog. It is attached to a carrier and its trajectory is a closed planar curve, close to the ellipse. The feed dog receives the horizontal and vertical component of its motion from two conditionally separate kinematic chains that have a common drive.The aim is analytical research and comparative analysis of the energies of needle bar mechanism and a mechanism driving the feed dog of the sewing machine. The energy consumed by each of the links of chains, of the chains themselves and total energy consumed by each of the two mechanisms for a full turn of the main shaft of the machine was studied. A comparative analysis of the energies and their distribution was carried out during the working process and the free movement of each of them. The results of the comparative analysis are presented in graphs and diagrams. It can be seen that the energy consumed by the needle mechanism is significantly greater than that of the transport mechanism. This fact is due to the much higher speeds of the links of the first one

Analysis of consumption of insulin in the municipality of Stip from 2011 to 2014

Diabetes mellitus is a syndrome characterized by chronic hyperglycemia and disorder of the metabolism of carbohydrates, protein and fat associated with a relative or absolute lack of insulin secretion and insulin action. Diabetes is one of the most common endocrine disorders, with a tendency of increased growth. It is a consequence of modern lifestyles and the increasing number of internal, genetically conditioned and external etiological triggers. Diabetes is not only medical but also economic and social problem

ISOLATION, SCREENING AND CHARACTERIZATION OF CELLULOLYTIC BACTERIA FROM DIFFERENT SOIL SAMPLES FROM PELAGONIA REGION

Cellulose is the most abundant renewable natural product in the biosphere, so cellulolytic microorganisms are fundamental for the transformation of cellulose into sugars that are essential nutrients for various organisms and for biofuels. Additionally, since the annual production of cellulose is estimated at 4.0 x 107 tons, large quantities of industrial and agricultural cellulosic waste have been accumulated due to inefficient use. Different kind of soils could potentially support several microbes with potent cellulolytic enzyme activities and therefore the exploration of those communities could be useful for biotechnology as well as for ecological conservation. The goal of this study was to conduct a survey for bacteria with cellulolytic potential, isolated from soils originating from Pelagonia Region. To select microorganisms with cellulolytic potential, qualitative cellulolytic activity was determined by culturing microorganisms in media containing cellulose as the only carbon source. After screening, fifteen colonies were isolated capable of degrading cellulase.  Determination revealed the isolates were identified as Bacillus spp., Bacillus weihenstephanensis, Pseudomonas putida and Staphylococcus spp. This study gives an overview of the potential microorganism that could be used for cellulose degradation in various biotechnological applications and for sustainable agricultural waste treatment

Coverage of dental services by the National Health Insurance Fund in Bulgaria

The global population often overlooks the importance of maintaining dental health, despite the fact that early detection can prevent the majority of dental diseases. It is quite common for patients to be unable to access dental treatment due to the lack of coverage in their health insurance packages. In this study, we examined the coverage of dental activities provided to health-insured patients in Bulgaria by the National Health Insurance Fund, using the framework of the Universal Health Coverage Cube, which includes width (coverage extent), depth (proportion of costs covered), and scope (covered services). The analysis incorporates dentists' perspectives on the publicly covered package of dental care within the country. Unfortunately, there are significant gaps in the healthcare system's coverage for one of the most prevalent dental diseases, and preventive activities are also not included. These limitations in the scope of public coverage hinder patients from accessing the necessary dental services in a timely and comprehensive manner

The Impact of Augmented Reality for Displaying Virtual 3d Models of Products in Real Environments on Improvement of the Consumer Experience in Buying Industrial Designed Products

The purpose of this paper is to explore the possibilities for implementation of the augmented reality (ÐR) in the sales. The augmented reality contributes to enhansing and improving the consumer experience through the virtual display of 3D models of products in realistic environments. In this paper is presented an overview of the consumer behavior in online shopping and their uncertainties in the process. The online shopping offers more satisfaction to the modern consumers looking for comfort and speed. On the other hand, some consumers still feel uncomfortable to shop online. What prevents them from buying online is the inability to realistically check the products, to examine their different variants, and to show them to their friends from which they will get comments and opinions before the purchase. In this thesis are examined the possibilities for implementation of augmented reality technology in online stores, as well as the possibilities for management of the product configurations in AR – options for  choosing different materials and colors of the product, that will allow the customers to adjust the product to their needs. The aim is to find methods and techniques that would alleviate the disadvantages as result of the lack of physical contact with the products during online sales, that would reduce the consumer uncertainty and increase the likelihood of successful choice and increased online sales

NMR h3 JNC’ Couplings Provide Comprehensive Geometrical Constraints for Protein H-bonds in Solution

Protein backbone H-bonds (>N–H···O–C<) show relationships between NMR h3JNC\u27 couplings measured in solution and H-bond geometry parameters seen in X-ray crystal structures. Assuming that the solution and crystal structure of protein backbone is the same, the h3JNC\u27 couplings can be calibrated to provide good estimates of both angular and radial H-bond parameters in a solution. The crucial premise of equality between the solution and the crystal structure of protein backbone we validated on the level of the NH-bonds orientation, by comparing the orientations inferred from X-ray crystal structures with the solution ones determined from NMR residual dipolar couplings

THE INFLUENCE OF DIFFERENT CLIMATIC TYPES ON THE NUMBER OF Bacillus spp. ISOLATED FROM SOIL IN NORTH MACEDONIA

Soil microorganisms play an important role in the biogeochemical processes of various elements vital to plant growth and animal life. Understanding and predicting the effects of climate change on soil microorganisms and their role in the ecosystem is a major challenge and provides an opportunity to focus research efforts on one of the most pressing problems facing our planet. Bacillus is a widely distributed genus with 347 species and 7 subspecies known to date. Members of this genus are capable of forming spores that are resistant to extreme heat, bactericidal agents and chemical disinfectants. Many Bacillus species are used in medicine and agriculture to produce antibiotics and also serve as probiotics in foods. Climate, as an abiotic factor, influences soil microorganisms by controlling the rate of soil formation and the chemical composition of the soil. Most soil microbiology studies focus on the diversity and abundance of soil microorganisms and on documenting the effects of environmental changes on these microorganisms. This new research trend can be applied to Bacillus spp. from soils in North Macedonia in the three climate types represented, mainly due to the climatic differences between them. This research focuses on the determination of soil geochemical parameters and microbiological analyses. A total of 36 strains of Bacillus spp. were isolated, 6 of which showed antimicrobial activity against certain test microorganisms. According to the results, it was also found that the diversity of Bacillus species changes depending on the soil microenvironment under the influence of different climatic conditions