Faculty of Mechanical Engineering

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    Item type:Publication,
    ПОТЕНЦИЈАЛНИ РИЗИЦИ ОД УПОТРЕБАТА НА ТЕЧНИОТ НАФТЕН ГАС КАКО ПОГОНСКО ГОРИВО КАЈ МОТОРНИТЕ ВОЗИЛАТА
    (2016)
    Vase Jordanoska
    ;
    Darko Danev
    ;
    Aleksandar Kostikj
    Течнипт нафтен гас (ТНГ) е најширпкп упптребуванп алтернативнп гпривп кај мптпрните впзила ппкрај бензинпт и дизелпт. ТНГ кпј вп пснпва е безбпен и е без мирис, е прпизвпд пд прпцеспт на рафинираое на други гприва. Негпвата упптреба се дплжи на дпбрите гпривни карактеристики и ниската цена на чинеое. Впзилата кпи гп кпристат ТНГ какп ппгпнскп гпривп се прпизведени сп систем за наппјуваое сп ТНГ или пак, се впзила сп бензински мптпри кпи ппстпрпдажнп имаат вграденп дппплнителен систем за наппјуваое сп ТНГ. Втприте се најчестп двпгпривни впзила, пднпснп имаат мпжнпст за префрлуваое пд еднп на другп гпривп вп текпт на експлпатацијата. Дп сега ппстпјат ппвеќе генерации на системи за наппјуваое сп ТНГ кај впзилата, кпи се развивале паралелнп сп развпјпт на технплпгијата кај бензинските мптпри. Гаспт за да биде вп течна спстпјба се складира при притиспци ппмеду 2.2 и 22 bar зависнп пд пднпспт на кпмппнентите вп негп. За да се запази безбеднпста, впзилата ппремени сп ТНГ системи, какп и самите системи за наппјуваое сп ТНГ се регулирани сп правилници на Екпнпмската кпмисија за Еврппа на Обединетите нации (UNECE). Вп трудпт се дадени ризиците кпи мпжат да прпизлезат пд упптребата на ТНГ системи кај впзилата, какп и причините кпи мпжат да дпведат дп ппјава на пдредени хаварии.
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    Item type:Publication,
    Feasibility of an eco-ethical simulation in a conditionally real world
    (2018)
    Dimoska M., Lazarevska A. M.
    A fundamental problem regarding the functional interpretation of our subsistence and perseverance has always been existent. Analytical characterization of our real world, in particular with reference to the ethical aspects of environmental protection, has rarely been measured properly, lacking equipment and/or capacity. Thus, the work presented herein is an initial attempt to analytically characterize and compare ecoethical aspects of the real life versus the world in ancestor artificial simulation and their traits. The feasibility examination of an eco-ethical simulation in the conditionally real world, in this work, is based on the postulates of the simulation argument, while Multi-criteria Analysis (MCA) is utilized as methodological tool. Thus, the focus herein sets on: (1) the attempt to identify the characteristics of both worlds – the presumably real world and the simulated world –, and (2) the observations of ecological and ethical aspects in order to characterize their strain on realizing a conditionally ideal world. Concordantly, in the theory of ancestor artificial simulation the focus shifts on identifying which aspects have already been established; which should additionally be taken into account and finally which should be ejected in order to contribute to the presumably real eco-ethical world. In this work presented are the preliminary outcomes showing whether there are or are not realizations of an ethical simulation versus the eco-ethical presumably real, unideal world. This paper proposes a model for evaluating the reliability of the theories.
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    Production and consumption based approach in analysing international spillovers of energy and its relation to development
    (2018)
    Mitevska M., Wood R., Lazarevska A. M., Markov Z.
    The world’s population growth causes increase in production and consumption of goods and services, on one side, and greater demand for land, energy and materials, on the other, leading to intensified global economic activity and global exchange of goods and services. International trade creates economic linkages among nations thus implying energy spillovers between industrialized countries or the so – called OECD and non-OECD countries. In this research paper, the production – based and the consumption – based use of energy and its correlation with economic growth is analyzed. The Multi – Regional – Input – Output (MRIO) methodology is utilized to determine the amount of direct and indirect use of energy related with products traded internationally. The analysis encompasses 49 countries and regions, 200 industrial sectors and 7 final demand categories in the period from 1995 till 2012. The main focus of the analysis sets on natural resources extraction, energy carriers use and emissions relevant to energy use. Different perspectives causing changes to both international trade patterns and global economic development are discussed. The production and consumption accounting showed a certain decline in the amounts of energy embodied in the foreign exchange of products within the developed countries. In contrast, the figures for the developing countries had an increasing tendency, but surprisingly higher shares of renewable energy use within the national energy mix.
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    Sustainability, accessibility and energy efficiency aspects of conveying systems
    (2018)
    Krstanoski M., Lazarevska A. M., Mladenovska.D., Jakimovska, K.
    Vertical transportation planning is having a critical role in urban and building design. It has become a source of integrated and synergetic task of professionals involved in the design, from the project conception until building turnover, operation and maintenance of the buildings. Planning, design and construction of the conveying systems in contemporary architecture include researching human factors, geography and social aspects, accessibility per the applicable codes, foreseeing the future use and vertical communication in the building, roles and functions of the tenants in the building, focused on all challenges by addressing tenants needs in a most suitable manner. In high rises, the design team must understand all demands arising from building type, occupancy type, optimal selection of the elevator’s smart and sustainable technology, equipment type and placement, importance of the traffic study as the project delivery evolves in phases, energy demand, energy efficiency and measuring. As more tall buildings are designed mixed-use as oppose to single-use as it was in the past, all these aspects become fundamental in urban planning. Delivering a decision that enables reliable, sustainable and energy efficient vertical transportation on one side, researching and designing to meet the human complex cultural specifics and requirements, on the other hand, is a multifold problem facing challenges. It relates to subjective and objective components encompassed in numerous research fields to be included in the design considerations: architecture, engineering, ergonomics, manufacturing and technical aspects, economical aspects, sustainability, energy management and life safety. This paper proposes a conceptual hierarchical schematic categorizing and classifying the identified aspects, attributes and criteria assistive and relevant throughout the process of delivering a sound decision when choosing an optimal vertical transport for a specific building type. It also shows the importance of accessibility for all, by example of the requirements for systems in jurisdictions governed by the Americans with Disabilities Act (ADA), and local building codes, which vary by the occupancy, location and building height. The proposed schematic conforms to the contemporary standards for energy efficiency according to VDI 4701, and design in the related field. At the same time conforms to the sustainability scheme, such as building sustainability certification per the most popular LEED or BREEAM focusing on the specific requirements of the vertical transport as related to the building, occupancy, Architect’s design and final users’ needs and prerequisites.
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    End-of-life analysis of biodegradable plastics for industrial design purposes
    (2018)
    Selim I., Kandikjan T., Lazarevska A. M.
    Today, academic community and manufacturers are making efforts to develop plastics that have short time span in order to accommodate environmental, social and economic implications. Eventually, biodegradable plastics are gaining attention among designers and companies as materials that can imitate the benefits of petrol based plastics having the capability of degradation. The selection of these materials has influence on the production facilities, consumer use and disposal methods. These requirements are challenging, but in parallel they provide opportunities for designers in the product development process as they influence the production facilities, consumer use and disposal methods. The designers should be able to solve the problem by designing products that fulfill both the needs of biodegradability and user acceptance. In order to adopt the biodegradability requirements in the design process, the implication on the different phases of the product life cycle have to be reviewed. Unfortunately, since these materials are remarkably new in the industry, there is a lack of information for these environmental friendly materials in the literature review. Thus, in the scope of this research, based on currently available sources an adapted industrial design scheme is developed to demonstrate the end-of-life cycle analysis of biodegradable plastics.
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    Adaptation of the Industrial Design thinking process to the demands of biodegradable plastics
    (2018)
    Selim I., Kandikjan T., Lazarevska A. M., Mladenovska D.
    A variety of definitions for Industrial Design (ID) were developed according the industrial evolution through time. However, it is hard to decide on the definition that suits best for this considerably new research field since it actually is manifested through a type of process. In this view, many common methods are proposed in the related literature that companies or designers use in the product development. Hence, the remarkable development of technology and tools affects the phases in the ID processes and therefore they can be revolutionary game changers. In order to facilitate transforming the ID decision making process into a real eco-friendly product, the environmental factor is used as a focal point. Moreover, for more precise research, biodegradable materials are used as a problem statement. In addition, the aim of this research is to propose a scheme which categorizes the ID phases according the needs of biodegradable materials when designing for environment. In this approach, the ID process includes also the phases such as: end-of-life analysis of the proposed materials, scenarios that occur according this analysis, concepts that fulfill technical and aesthetic requirements, and production and evaluation of prototypes given the environmental, economic and social criteria. The aim of the proposed scheme corresponding to the decision making process is to provide a new method as a facilitative guide for environmentally oriented ID thinking process.
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    Item type:Publication,
    Optimisation of porous structure morphology for an orthopaedic implant with improved performance and durability
    (Leibniz Institute for Solid State and Materials Research Dresden, 2014-11-08)
    ;
    Marko Gradišar