PRODUCTION ENGINEERING Research Papers - Academia.edu (original) (raw)

2025

The objective of this dissertation is to enhance the overall understanding of practical manufacturing systems by using rigorous academic approaches, primarily queueing theory. The scope spans from the performance of a single manufacturing process to the performance of a manufacturing system. Queueing models are commonly used to evaluate the performance of manufacturing systems. Exact M/M/1 or approximations of G/G/1 models are usually adopted to describe the behavior of a single machine system. However, when applying queueing models to a single machine, some practical issues are encountered. A real machine is subject to different types of interruptions, such as breakdowns, setups and routine maintenance. The proper queueing models under interruptions are presented. The behavior of manufacturing systems is explored by first investigating the underlying structure of tandem queues. We introduce two properties describing the dependence among servers in tandem queues, namely the intrinsi...

2025

Packaperforma is a tool developed in order to increase the efficiency, effectiveness and differentiation in the future design of packaging systems. The tool is based on the theory Packaging Logistics Performance. Packaperforma is a further development of Packaging Scorecard and it could be utilized by packaging designers and supply chain managers to see the functions of the packaging system in the logistics processes. This means that the gap between packaging decisions and logistics decisions can be mitigated, as it can share the downstream information with the upstream and the designers. Packaperforma is used to conduct comparative studies in multiple Supply-Demand Chains. A study as such increases the quantity of data in the Packaperforma database that could be used to indicate the performances of the packaging, the agent and the Supply Demand Chains. The paper presents a study on Packaging Logistics Performance, how to evaluate packaging performance; how to collect feedback infor...

2025, Journal of Manufacturing Processes

Hybrid manufacturing is a new production strategy based on the combination of various processes to manufacture components more efficiently in terms of quality, productivity, and/or sustainability. Combinations of subtractive, forming, and additive manufacturing processes can follow one another to produce the desired parts. Hence, both part complexity and performance can increase significantly. The highlighted strategy has been tested by considering two different processes that are typically utilised for small batches of customised parts. Specifically, selective laser sintering has been used to thicken sheets locally, which are subsequently formed by single point incremental forming. This process combination can result in the development of a rapid prototyping technique that exploits the peculiarities of both the utilised processes, and thus allows for the manufacturing of more complex and/or higher quality parts, in a more flexible manner. In the research herein reported, various solutions have been tested to analyse the impact of the proposed hybrid manufacturing strategy on the a) dimensional accuracy, in terms of deviation from the nominal shape, b) quality, in terms of thickness distribution, and c) part complexity, in terms of the obtainable three-dimensional shape, of stainless-steel-formed sheets.

2025, Measurement

This study was carried out to understand micro-milling of aluminum material with ball nose end mill and consisted of four stages: experimental work, modelling, mono and multi objective optimization. In the first stage (experimental work), micro-mill ing experiments were carried out using Taguchi method. The effects of spindle speed, feed per tooth and depth of cut on tool wear, force and surface roughness were investigated. Cutting tools and workpiec e surfaces were also inspected via scanning electron microscope. Adhesion and abrasion wear mechanisms during micro-milling of aluminum were observed. Workpiece surfaces had the accumulations of plastically deformed workpiece material due to the high ductility of aluminum. In the second stage (modelling), all data gathered in the experimental works were utilized to formulate first-order models with interaction. These first-order models with interaction could be used to predict responses in micro-milling of aluminum with a minor error. In the third stage (mono-objective optimization), responses were used alone in optimization study as an objective function. To minimize all responses, Taguchi's signal to noise ratio was used. The effect of control factors on responses was determined by analysis of variance. In the fourth stage (multi objective optimization), responses were optimized simultaneou sly using grey relational analysis.

2025, Journal of Constructional Steel Research

Steel bracing systems are usually introduced to assure the structural stability and seismic resistance of steel storage pallet racks, whose height over the last years has increased more and more to improve warehouse efficiency. In the present paper, the axial response, under monotonic and cyclic load, of perforated cold-formed steel diagonals of concentric bracing systems is investigated through experimental tests. To satisfy the design and detailing rules required by the capacity design approach, such as the ratio between overstrength coefficients and the value of the non-dimensional slenderness, tested diagonals are equipped with additional holes at one end. Results of monotonic tests, under compression and tensile load, provide useful information about the influence of the number and shape of holes on the ultimate strength, ductility and buckling load of bracings. Cyclic tests highlight how the member slenderness and the class of its cross-section affect hysteresis loops and energy dissipation. Finally, some novel considerations are presented concerning the influence of the shape, dimensions and distance of additional holes, in addition to member geometrical features like the cross-section class, on the cyclic response of tested members. In the framework of the "Design Assisted by Testing", results could be adopted for the capacity design of perforated concentric cold formed diagonal bracings as those adopted in steel storage pallet racks.

2025, Journal of Assistive, Rehabilitative & Therapeutic Technologies

This work presents a procedure to simulate the static and cyclic strength tests implemented to ensure the structural integrity of a four-bar linkage prosthetic knee. The test protocols used in this work follow a standard defined by the International Organization for Standardization (ISO). This standard is titled 'Prosthetics* Structural Testing of Lower-Limb Prostheses*Requirements and Test Methods' or shortly called ISO 10328: 2006. The purpose of this standard is to guarantee that a prosthesis is able to survive a random severe load and has a sufficient fatigue life. Finite element method, which is a numerical technique used to model a physical system, is employed as a primary computational tool to simulate the prosthesis under the tests. The method of explicit nonlinear transient stress analysis is applied to determine the strength of prosthesis. Consequently, the finite element model reveals the stress distributions induced on the prosthesis and predicts its fatigue life. Besides, to examine the accuracy of the model, the simulation results, particularly structural strains, are validated with those obtained from experiments. In each testing condition, five repetitions are performed to ensure the result consistency. The validation results confirm the fidelity of the proposed finite element model. The average of absolute percentage errors between the simulation and experimental results in all testing scenarios is estimated to be 22%.

2025

This is to certify that the thesis entitled "Evaluation of Nitride Layer on Ti-6Al-4V Titanium Alloy by Tungsten Inert Gas (TIG) Nitriding Method" being submitted by Chirag Panwariya (214ME2343) for the partial fulfillment of the requirements of Master of Technology degree in Production Engineering is a bonafide thesis work done by him under my supervision during the academic year 2015-2016 in the

2025, Manufacturing review

Tool wear is complex to predict due to the intricate environment of a machining process. However, there are a confrontational effect of tool wear on the machining process in terms of deprived surface finish, reduced dimensional accuracy and increased power consumption. In this study an attempt is made to examine the effect of rake face surface of the cutting tool on tool crater wear. For this, three different types; uncoated, coated and structured rake face cutting tools were used and cutting test were performed of plain carbon steel (AISI/SAE 4140). The cutting speed of 283 m/min, feed rate of 0.1 mm/min and depth of cut of 0.1 were used. Results show, structured rake face of the cutting tool benefitted most in supressing the tool crater wear. Energy-Dispersive X-Ray analysis (EDXA) analysis confirms reduction in iron transfer on tool rake face in case of coated and structured cutting tool. Micro À hardness test was also performed and the values in case of coated and structured cutting tool was found to be suffice. This study can be a benefit for cutting difficult to cut material where crater wear formation is unavoidable.

2025

This paper presents a new approach based on a fully coupled procedure in which the lubricant flow and the plastic deformation of the metallic material are solved simultaneously. The approach is applied to strip reduction of a sheet with surface pockets in order to investigate the escape of the lubricant from the pocket by means of Micro Plasto HydroDynamic Lubrication (MPHDL) and Micro Plasto HydroStatic Lubrication (MPHSL) mechanisms.

2025

U radu je prezentirano korištenje numeričkih metoda za proračun raspodjele zaštitnih struja/potencijala u sustavima katodne zaštite s galvanskim anodama. Analizirana je kombinirana metoda BEM/FEM, tj. kombinacija metode rubnih i konačnih elemenata. Sustav katodne zaštite je vrlo učinkovit sustav za zaštitu podzemnih metalnih objekata od korozije. Optimalno i tehnički korektno definiranje raspodjele zaštitne struje predstavlja najvažniju fazu kod projektiranja sustava katodne zaštite. Određivanje raspodjele zaštitnih struja/potencijala u sustavima katodne zaštite temelji se na rješavanju Laplaceove jednadžbe uz korištenje adekvatnih, prethodno definiranih rubnih uvjeta. Ovi uvjeti su definirani preko analitičkih izraza za funkcionalne odnose između gustoća zaštitnih struja i potencijala na elektrodnim površinama, odnosno na granicama elektroda/elektrolit. Na istom objektu za kojeg su urađeni numerički proračuni izvršena su i mjerenja raspodjele zaštitnih potencijala tijekom vremena eksploatacije. Eksperimentalni podaci, koji su dobiveni tijekom puštanja sustava u funkciju te namjenski pravljenih periodičnih mjerenja tijekom održavanja sustava uspoređeni su s numerički dobivenim vrijednostima. The use of numerical methods for calculation of protection current/potential distribution in cathodic protection systems with galvanic anodes is presented in this paper. The coupled BEM/FEM method has been analysed, i.e. a combination of the Boundary Element Method (BEM) and the Finite Element Method (FEM). The cathodic protection system is a very efficient system for the protection of underground metal structures from corrosion. The most important phase of the projecting of the cathodic protection system is the optimally and technically correct defining of protection current distribution.. The calculation of protection current/potential distribution in cathodic protection systems is based on solving Laplace's equation using adequate, previously defined, boundary conditions. These conditions are defined by using analytical expressions for the functional relationship between protection current and potential on electrode surfaces, or the electrode/electrolyte boundary. On the same structure for which the numerical calculations were made, measurements of protection potential distribution during the time of exploitation have been taken. Experimental data acquired during the start of system operations, together with intentional periodical measurements during system maintenance, are compared with data acquired by numerical calculations.

2025, Independent Journal of Management & Production

This work aims to investigate an entrepreneurial intention of production engineering students in Hard Sciences and Technology Institute (ICET) linked to Federal University of Amazonas (UFAM). Regarding the methodology, this research is quantitative, regarding the approach of the problem, exploratory, regarding the objectives of the research, and a case study with regard to the technical procedure adopted. The research sample was formed by courses of production engineering course and contains a participation of 100 students. The research techniques used were: indirect documentation and extensive direct observation through the application of the forms of entrepreneurial intention with the students. In terms of results, the following stand out more than half of the students are not entrepreneurial products; however, almost all of their users are in a position to become entrepreneurs; strong indication for selfemployment; search for an innovative idea as the main barrier to entrepreneurship. The study points to a proactive stance with regard to entrepreneurship even considering that as areas of engineering, they concentrate a large part of their professionals as employees in public or private companies.

2025, International Journal of Applied and Natural Sciences

The health and environmental hazards linked to asbestos-containing brake pads have precipitated a global initiative aimed at the development of sustainable alternatives derived from bio-based materials. This review article meticulously investigates the performance attributes of bio-based brake pads that incorporate natural fillers as viable substitutes for asbestos. The research emphasizes various agricultural byproducts, such as coconut shell powder, palm kernel shell, hemp fiber, sugarcane bagasse ash, and banana peel ash, assessing their mechanical, thermal, and tribological properties. The methodology encompasses an extensive analysis of the extant literature, elucidating the composition, processing methods, and performance indicators of these fillers within brake pad composites. Composites made from palm kernel shell demonstrated a compressive strength of up to 96.2 MPa, while materials based on coconut shell showcased exceptional hardness (up to 186.2 BHN) and wear resistance, with sugarcane bagasse ash and banana peel ash contributing to enhanced thermal stability attributable to their silica content. The conclusion accentuates the feasibility of these environmentally-friendly materials, which not only fulfill performance criteria but also alleviate the environmental and health concerns associated with asbestos. Recommendations entail the further optimization of filler compositions and surface treatments to enhance uniformity and adhesion within composite matrices, thereby facilitating sustainable applications in the automotive sector. | KEYWORDS Bio-based brake pads, natural fillers, palm kernel shell, coconut shell powder, banana peel ash, sugarcane bagasse ash, groundnut shell, tribological properties, thermal stability, eco-friendly composites, sustainable materials.

2025, Production Engineering

Grinding processes are often used for final finishing of components because of their ability to satisfy stringent requirements of surface roughness and dimensional tolerance. Surface topography generated during grinding depends upon many parameters like wheel parameters, wheel velocity, downfeed, grit density etc. and it also depends upon the type of grinding procedures (viz. plunge grinding, traverse grinding, helical grinding, touch dressing etc.) employed. Therefore, a correct examination of the parameters and type of process employed to carry out grinding are necessary. This paper is an attempt to develop the relation between the different grinding parameters and the grinding procedures like plunge, traverse and helical superabrasive grinding with touch dressing and the average surface roughness. For this purpose, a numerical simulation technique has been implemented to generate the grinding wheel topography. The ground workpiece surface has also been generated by simulating removal of work material depending upon the trajectory of the abrasive grits on the grinding wheel without taking rubbing and ploughing into consideration.

2025, Industrial Engineering & Management Systems

One of the major challenges in manufacturing systems is addressing bottlenecks. Managers and engineers strive to find methods to eliminate bottlenecks and reduce wait times in production lines. In this study, a simulation model of a manufacturing system was analyzed, focusing on bottlenecks and underutilized machinery. Validated simulation inputs were collected to build a model for optimizing the production line. The objective was to simulate the current production line to understand and analyze its bottlenecks and propose improvement solutions. The simulation model was developed using Arena software, revealing several bottleneck stations affecting production line efficiency. A model incorporating different parts of the production line and inventory management of cement was proposed to address this problem. Various improvement steps were analyzed using the simulation model to eliminate bottlenecks and enhance production line performance. As a result, the daily production capacity of the rotary kiln increased from 3699 to 8200 tons, more than doubling the current output.

2025, Journal of Engineering, Project, and Production Management

Worldwide, the medium density fiberboard (MDF) materials have been extensively used for furniture as well as a normal building material. The MDF production is based on wood materials that are obtained from the tree cutting, and this process may conduct to gradual deforestation. Different works have shown the advantages of using other renewable biomass sources for MDF manufacturing. This study aimed at assessing the potential of using the African couchgrass, as one of worldwide available grass, and which has been one of the most worrying weeds for agriculture areas. The test with the manufactured MDF checked such material properties like density, moisture content, water absorption, and thickness swelling. The established results were 727.143 kg/m3, 5.81%, 9.18%, and 7.6% respectively. All those results are in the range of standard values recommended by ASTM D1037, and they give optimism for the application of couchgrass in the manufacturing of MDF. This new material was planned to be...

2025, Production Engineering

2025

Organizations that adopt a software product line strategy often have business goals that concern improving their ability to produce products by lowering product development costs, by reducing the time to bring a product to market, or through other production improvements. Business goals such as these make automated product derivation an appealing strategy to a software product line organization. Automating production requires up-front investment, including the creation of both the core assets that will be assembled as products and the core assets that will perform the assembly. A software product line provides the ability to amortize the cost of the infrastructure over a set of products. This report views the process for automating the production of products in the context of a product production system. The process begins with the decision to automate, proceeds to the selection of the automation approach, and continues with the operation and management of the automated production c...

2025

Software product line practice is an effective strategy for developing families of software-intensive products. Business modeling is a fundamental practice that provides input into a number of decisions that are made by organizations using or considering using the product line strategy. This report presents the Structured Intuitive Model of Product Line Economics (SIMPLE), a general-purpose business model that supports the estimation of the costs and benefits in a product line development organization. The model supports decisions such as whether to use a product line strategy in a specific situation, the specific strategy to apply, and the appropriateness of acquiring or building specific assets. This report illustrates the model's scope by presenting several scenarios and its usefulness by integrating it into several product line practice patterns. The report ends with a description of future work aimed at making the model usable by product line practitioners.

2025

Production planning and variation modeling are interdependent parallel activities critical to the success of a software product line. Software product line organizations design a production capability to satisfy their business goals. That production capability is dependent on and must support the full range of product variation. Current techniques for variation modeling identify and handle variations among products but fail to recognize variations that result from business goals such as rapid time to market which are satisfied by how products are built. In this paper we present a view of our production planning technique and describe our preliminary research into its relation to variation modeling.

2025, Australian journal of basic and applied sciences

One of the most important production issues in oil fields is high water production which may lead to wells killing and reduction in an economical production period. With the increment of water production or decrease of reservoir pressure, reservoir drawdown pressure reduces which causes reduction in oil production rate. To preserve the reservoir production, we should apply one of the proposed methods; namely, increasing the reservoir pressure, preventing water source invasion or using artificial lift technique. To compensate this reduction, continuous gas injection into the wells can be used. The injected gas combines with fluid in tubing and the density of the fluid decreases, thereby reducing the hydrostatic pressure loss along the flow path. By utilizing this method fluid can be produced in low flowing pressure through tubing. In this study, the offshore R-1 well was revived using artificial lift methodology to achieve incremental reserve recovery after the well had stopped produ...

2025

Information models can make a large contribution to the process integration, not only the product development process, but throughout the entire life cycle of a product . The new technique of linear flow splitting developed at the Technische Universität Darmstadt, Germany, makes it possible to produce integral sheet metal parts with higher order bifurcations. A new approach for integration in product development and process planning based on an information model is being developed in Collaborative Research Centre (CRC) 666 in Germany . In this paper, we present an information model for modeling and representing design and manufacturing information of integral sheet metal parts with higher order bifurcations. Due to the bifurcated structure, principle solutions of integral sheet metal parts optimized by mathematical algorithms can be mapped in solution trees. Based on the solution tree, linking between conceptual design, detail design and process planning can be defined. Specific views of theses phases are explicit modeled in partial models. Consistence of the partial models and the linking to the boundary representation is made by an integration model. The information model is formalized in Unified Modeling Language (UML). A prototype system based on this information model demonstrates its application in integrated product development and process planning in integral sheet metal design.

2025

This is to certify that the work in this thesis report entitled Estimation of calorific value of biomass from its elementary components by regression analysis submitted by Vijay Krishna Moka in partial fulfillment of the requirements for the degree of Bachelor of Technology for the session 2011-2012 in the department of Mechanical Engineering, National Institute of Technology, Rourkela is an authentic work carried out by him under my supervision and guidance.

2025

The construction industry consumes large amount of natural resources. These resources, if not properly utilized, will lead to a generation of waste. These wastes do not add value and affect the construction industry's performance globally. The aim of this research is to improve operational performance of Malaysian construction industry by the application of Lean Production System (LPS) that has a significant impetus in reduction of waste. The assessment of construction practices against Lean Production System principles was carried out through structured questionnaires to the G7 construction organizations, that is, organizations which have no limit to tender for construction jobs. These organizations are registered with the Construction Industries Development Board (CIDB), Ministry of Works Malaysia. The data revealed that the G7 construction organizations have integrated some form of LPS principles in day-to-day operations at the macro level; however knowledge of LPS is not fully conceptualized. The application of LPS principles has improved operational performance because findings revealed that there is a correlation between Lean Production System (LPS) and operational performance (OP).

2025

Vegetable slicing machines are becoming more and more popular in this day and age. There are also so many types and sizes of various brand which can be found in local market for domestic use. But, there are small and medium fried potato businesses that are producing fried potato chips with a high capacity in Myanmar. Therefore, when the local fried potato businesses are slicing the raw potatoes, they use human workers for peeling and cutting. Even though the skillful workers are used, the processing time is still long. It should be faster for high production and also have human errors such as unequal thickness of potato chips, etc. To overcome the ineffective factors, the potato slicing machine which is intended for the local small and medium fried potato businesses will be an answer. In this research, the potato slicing machine is designed and constructed for the local fried potato business. The capacity of the machine is four kg/min. The 1.1 kW motor is used for driving mechanism....

2025

The Quality of Work Life (QWL) has its origin in the industrial, manufacturing and manufacturing environment. Its applicability in Higher Education Institutions (HEI) needs to be deepened due to the incompatibility of the simple transposition of this theme to such reality. This thesis has as general theme the presentation of a proposal of a model of management of QWL in HEI. The question of this thesis is: How to structure and make feasible the implementation of QWL in HEI from a conceptual framework of Quality of Work Life Management (QWL-M)? Its general objective is to elaborate a conceptual framework of QWL-M in HEI. The developed method used the Design Science Research where the framework for the management of the quality of work life was constructed and the Roadmap as proposal of implementation of this model. The empirical field of research was a Community HEI of Southern Brazil. The Results are expressed in nine macro elements: Policies, Strategy, Processes, Leadership, Struct...

2025, Poznan University of Technology Academic Journals. Electrical Engineering

Laboratoryjne badania układów regulacji temperatury urządzeń elektrotermicznych są zazwyczaj czasochłonne. Fakt ten wynika ze znacznych wartości stałych czasowych rzeczywistych układów grzejnych. Jedną z możliwości efektywnego ograniczania czasu pomiarów jest wykorzystanie modeli analogowych, umożliwiających dokładne odzwierciedlenie warunków pracy urządzeń elektrotermicznych, w zróżnicowanych skalach czasu. Niekwestionowaną zaletą modeli tej klasy jest możliwość dowolnego kształtowania dynamiki przebiegów czasowych prądów i napięć, oraz dopasowania modeli do układów wyjściowych badanych regulatorów. W niniejszym artykule zaproponowano wykorzystanie uniwersalnego modelu Beukena, sprzężonego z układem regulacji zaimplementowanym w sterowniku PLC, do badania charakterystyk statycznych i dynamicznych zróżnicowanych typów regulatorów. Możliwość rejestracji i porównania przebiegów czasowych wielkości regulowanej oraz sygnałów sterujących, pozwala na wybór racjonalnego algorytmu sterowania, oraz nastaw regulatora, gwarantujących spełnienie warunków określonych przez użytkownika. SŁOWA KLUCZOWE: regulacja temperatury, model analogowy RC, symulacja Większość procesów realizowanych w przemysłowych urządzeniach elektrotermicznych wymaga realizacji założonych programów grzejnych lub utrzymywania temperatury z wymaganą dokładnością. Zagadnienia te realizowane są najczęściej przez dedykowane regulatory temperatury. Spośród wielu spotykanych typów układów regulacji, najbardziej rozpowszechnione są regulatory dwustawne, proporcjonalne oraz proporcjonalno -różniczkującocałkujące (PID) . Wszystkie z wymienionych algorytmów regulacji charakteryzują się względną prostotą, niewielką liczbą nastrajanych parametrów oraz możliwością uzyskiwania wysokiej jakości regulacji. Wymienione zalety, w połączeniu z uniwersalnością (zwłaszcza regulatorów PID), sprawiły, iż są one chętnie wykorzystywane, zarówno w aplikacjach przemysłowych, jak i komunalno -bytowych.

2025, Poznan University of Technology Academic Journals. Electrical Engineering

2025

In mature gas wells, the accumulation of fluids in the well can impede and sometimes halt gas production. Gas flow is maintained by removing accumulated fluids through the use of a beam pump or remedial treatments, such as swabbing, soaping, or venting the well to atmospheric pressure (referred to as “blowing down” the well). Fluid removal operations, particularly well blowdowns, may result in substantial methane emissions to the atmosphere.

2025, https://www.ijrrjournal.com/IJRR\_Vol.10\_Issue.6\_June2023/IJRR-Abstract71.html

The need for wire arc additive manufacturing (WAAM) has substantially expanded in recent years, and it has emerged as a possible alternative to subtractive production. According to research, the mechanical qualities of wire arc additively manufactured materials are comparable to cast material. When compared to other fusion sources, WAAM provides considerable cost savings as well as a higher deposition rate. However, WAAM presents considerable problems, including undesired microstructures and mechanical characteristics, large residual stresses, and deformation. As a result, more study is required to address the aforementioned problems by optimizing process parameters and post-deposition heat treatment. In accordance with the foregoing, this paper attempts to fill the gap by presenting a comprehensive review of WAAM literature, which includes stage-wise development of WAAM, metals, and alloys used, effects of process parameters, and methodologies used by various researchers to improve the quality of WAAM components. Furthermore, this work suggests topics that could be explored further in the future.

2025, 1st Global Research and Innovation Conference

This systematic review explores the integration of artificial intelligence (AI) in predictive maintenance and condition monitoring systems, with a focus on smart diagnostics across industrial applications. The study examines how AI technologies-including machine learning, deep learning, and hybrid models-are transforming traditional maintenance strategies by enabling automated fault detection, anomaly classification, and remaining useful life (RUL) estimation based on realtime sensor data. Drawing on a comprehensive review of 156 peer-reviewed articles published between 2015 and 2025, the research synthesizes current advancements in AI-driven maintenance tools and their applications in diverse industrial sectors such as manufacturing, energy, transportation, and utilities. Special emphasis is placed on the role of sensor technologies, including vibration, acoustic, thermal, and ultrasonic sensors, in providing the high-frequency data necessary for effective AI integration. Furthermore, the study discusses key theoretical underpinningsincluding Reliability-Centered Maintenance (RCM), Prognostics and Health Management (PHM), Spatial Decision Support Systems (SDSS), and Information Systems Success Models-that frame the adoption and impact of smart diagnostics. Despite clear benefits, challenges such as data quality, model interpretability, and integration complexity remain persistent. This review contributes to both academic discourse and industrial practice by offering a comprehensive understanding of how AI technologies are redefining maintenance strategies and by identifying research gaps and opportunities for future exploration.

2025, International Journal of Production Research

Steel production is an extremely complex process and finding its coherent schedules for the wide variety of production steps in a dynamic environment, where disturbances frequently occur, is a challenging task. In the steel production process, the blast furnace continuously produces liquid iron, which is transformed into liquid steel in the melt shop. The majority of the molten steel passes through a continuous caster to form large steel slabs, which are rolled into coils in the hot strip mill. The scheduling system of these processes has very different objectives and constraints, and operates in an environment where there is a substantial quantity of real-time information concerning production failures and customer requests. The steel making process that includes steel making followed by continuous casting is generally the main bottleneck in steel production. Therefore, comprehensive scheduling of this process is critical to improve the quality and productivity of the entire production system. This paper addresses the scheduling problem in steel making process. The methodology of winner determination using combinatorial auction process is employed to solve the aforementioned problem. Combinatorial auction based approaches are capable of minimizing large search space, discontinuity, and noise in order to obtain near optimal solutions. Hence in the proposed work the authors have adopted its splendid characteristics to enhance the quality of the solution in such complex scenarios. In the combinatorial auction, allowing bidding on a combination of assets, offers a way to enhance the efficiency of allocating the assets. In this paper, scheduling problem in steel making has been formulated as a linear integer program to determine the scheduling sequence for different charges. Then bids are obtained for sequencing the charges. Next, a heuristic approach is used to evaluate the bids. The computational results show that our algorithm can obtain optimal or near-optimal solutions for combinatorial problems. The proposed algorithm has been verified by a case study.

2025, Production Engineering

This paper is dealing with the influence of processing parameters for manufacturing of steel-carbon-fiber-reinforced-plastic (CFRP) hybrid plates by using the one-shot-hybrid resin-transfer-moulding (OSH-RTM) process. A design of experiments study was carried out. The quality of the manufactured parts was quantified by the bending modulus, the apparent interlaminar shear strength (ILSS), the maximum deflection and the density of the CFRP. The following changeable processing parameters were chosen: mould temperature, resin temperature, change in mass flow and maximum injection pressure. It is shown that the mould temperature and the change in mass flow show significant impact on the flexural modulus, density and maximum deflection of the plate while there is no significant impact on the apparent ILSS. Furthermore, the interaction between the mould temperature and resin temperature is having an influence on the flexural modulus and density.

2025

U radu se prikazuje korozija i metode zaštite koje strojari imaju na raspolaganju prilikom planiranja strojarskih instalacija i kompleksnih strojarskih sustava. Objašnjava se korozija, njezini osnovni teoretski procesi i načini zaštite koje se mogu primijeniti. Naglasak je na katodnoj zaštiti i njezinoj primjeni u industrijskim postrojenjima, a posebice termoelektranama. Objašnjavaju se prednosti i nedostaci pojedinih vrsta katodne zaštite na primjeru kondenzatora TE „Plomin“ i detaljno se prikazuju sustavi kojima se navedena antikorozivna zaštita i ostvaruje. Za kraj, prikazuju se zaključci koji su proizašli iz ove tematike i iz primjera na kojemu je teorija primijenjena.This paper gives a summary of corrosion and the ways that mechanical engineers can mitigate and apply as protection during the design, planning and constructing stages of complex mechanical systems and plants. Corrosion is explained in detail, it's fundamental theoretical processes and the ways we can protect a...

2025, Editora Conhecimento Livre eBooks

Resumo: O presente documento apresenta o resultado da ação de colaboração do design com o artesanato de crochê, efetuado através da interação do autor deste projeto (Dias) com o grupo de crocheteiras assistidas pelo Espaço Mira Gabriel, na cidade de Paragominas, Pará. O contato realizado contempla os preceitos do Design Social indicando campos novos de atuação profissional no município, que beneficie tanto os artesãos e artesãs quanto a sociedade local, valorizando aspectos de sua produção popular. O projeto sequenciou-se por etapas inspiradas em outras produções do curso de design da UEPA, em suas relações com o artesanato, demonstrando a validade dessas ações em outros contextos. Como resultado, houve a concepção de uma coleção conceitual e primordial de sandálias inspiradas em borboletas da fauna amazônica, no intuito de referenciar o território amazônico e cumprir os requisitos de qualidade da ferramenta estrela de valores, e com isso, iluminar a produção artesanal no munícipio de Paragominas através do design.

2025

Soil Compaction is the fundamental requirement for the construction of earth fill for dams; reservoirs canal embankments, highway, railways and runways. The relationship between soil moisture contains and compacted dry density is very useful for deciding construction, specification and quality control of compacted earth fill. While designing a soil fill is evaluated by testing soil specimen compacted to the density as would be achieved during construction quality control is essentially required to check the density of compacted soil achieved in the field, by checking its strength. The working model which we have fabricated is totally based on the mechanism that compacts soil. It is designed in such a way that it will solve soil testing problem at a very low cost. The working principle of the model is very simple it is not too heavy and can be manually driven by just a single man the soil compaction machine is a new innovative concept is mainly used to save power. In this concept we ...

2025

2025, Journal of Materials Processing Technology

Injection forging is a nett-shape manufacturing process which enables the forming of complex component-forms that are difficult to form by conventional metal-conversion processes. The state-of-the-art of the research in this subject is reviewed with reference to different process configurations, forming limits, energy/pressure requirements, process modelling and product forms.

2025

Streszczenie. Celem pracy było sformułowanie założeń i konstrukcja układu regulacji i stabilizacji ciśnienia bezwzględnego, zasilającego autonomiczny aparat udojowy. Układ ten może być również stosowany w innych rozwiązaniach bazujących na tzw. doju ćwiartkowym, ale musi być spełniony warunek, że ciśnienie ssące jest dostarczane indywidualnie do każdego kubka obsługującego ćwiartkę wymienia. Zakres pracy obejmował: opracowanie koncepcji systemu sterowania, budowę rzeczywistego obiektu, zaprogramowanie sterownika PLC dla przyjętego algorytmu sterowania (bazującego na wcześniejszych badaniach naukowych autorów) oraz weryfikację pracy systemu na stanowisku laboratoryjnym. Głównym elementem układu regulacji jest sterownik mikroprocesorowy, w którym zaprogramowano algorytm regulacji ciśnienia, korzystając z logiki rozmytej. Wyniki przeprowadzonych badań doświadczalnych pozwoliły na pozytywną ocenę opisywanego rozwiązania technicznego.

2025, Journal of achievements in materials and manufacturing engineering

Purpose: Machining by electroerosion is a process of removal of material by fusion, vaporization and erosion, reserved essentially for conductor and semiconductor materials. It can be used to machine metals and alloys, the tempered steels, different type of ceramic alloys, other metallic carbides and even for harder materials such as polycrystalline diamond etc. The aim of this paper is to develop a mathematical model for the effect of cutting parameters on the machining by electro discharge machining used widely in industrial applications. Design/methodology/approach: It is about a study and detail analyzes effect of the cutting conditions in machining by electroerosion of steel 42CD4-42CrMo4 on the surface quality of the parts. The statistical method of the analysis of variance “ANOVA” makes it possible to release the considerable effects of the parameters of cut on the criteria of performance of machining by electroerosion, EDM. Findings: The result of the study shows that the na...

2025, Production Engineering

In recent years surface texturing of the cutting tools has proved to improve tribological characteristics at tool/chip and tool/workpiece interface and help to reduce cutting and feed forces as well as tool wear. Most, if not all, of the studies have focused on subtractively made textures whereby the material is removed from the surface. This study investigates the performance of additively made surface structures whereby hard ceramic particles are dispersed in the form of dome shaped textures on the surface of the cutting tools using solid state millisecond pulsed laser (pulsed laser implantation). Dry cutting tests were performed on ductile cast iron. The results show a greater reduction of process forces with implantation of flank face as compared to rake face. Both cutting and feed forces were reduced by 10% compared to the non-structured tool. In addition, the tool life increased by a factor of 3 whereas the average flank wear reduced by as much as 80% and cutting edge rounding...

2025

Streszczenie. w niniejszej pracy przeprowadzono analizę projektową instalacji grzewczej opartej na sprężarkowej pompie ciepła. instalacja ta zasila systemy centralnego ogrzewania i przygotowania ciepłej wody użytkowej w jednorodzinnym budynku mieszkalnym znajdującym się w miejscowości koleczkowo. w analizie zawarto ocenę strat i zysków cieplnych budynku, obliczenia zapotrzebowania na moc cieplną analizowanego obiektu oraz koncepcyjne rozwiązania instalacji grzewczej. zaproponowano wariant optymalny ze względu na maksymalną sprawność, do którego dobrane zostały jego główne elementy. Przeanalizowano wpływ grupy wybranych czynników chłodniczych na sprawność oraz parametry pracy zaproponowanej pompy ciepła. Słowa kluczowe: energetyka, instalacja grzewcza, pompa ciepła Abstract. This study involves a design analysis of the heating system based on a compression heat pump. This installation supplies central heating and tap water heating systems in a detached residential building situated in koleczkowo. The analysis includes an assessment of heat loss and gain of the building, calculations of the demand for the heating power of the building under analysis and conceptual solutions concerning the heating system. The optimal variant was proposed with regard to its maximum efficiency, for which the main elements were chosen. The effects of the set of selected cooling factors on the efficiency and operating parameters of the proposed heat pump are also analysed.

2025

The traditional method used in India, for the separation of copra and shell from partially-dried split coconuts, is labour intensive. To overcome this problem, a power operated coconut de-shelling machine was designed and developed. A coconut de-shelling machine comprising of cutter with belt drive. Performances test analysis conducted show that the machine de-shelled the fruits without nut breakage and also that its average de-shelling efficiency and capacity are 90% and 195 coconut per hour. All materials used in the fabrication of this machine are of standard specification and locally sourced. The estimated cost of producing one unit of the machine is twenty five thousand six hundred (Rs.25, 600). The machine also eliminated dependency on the epileptic public electric power supply in our rural areas which constitutes the major obstacle in the use of other mechanized coconut de-shelling equipment in the rural area.

2025, Journal of emerging technologies and innovative research

The traditional method used in India, for the separation of copra and shell from partially-dried split coconuts, is labour intensive. To overcome this problem, a power operated coconut de-shelling machine was designed and developed. A coconut de-shelling machine comprising of cutter with belt drive. Performances test analysis conducted show that the machine de-shelled the fruits without nut breakage and also that its average de-shelling efficiency and capacity are 90% and 195 coconut per hour. The result of the performances test carried out showed that the machine shelling efficiency increased with the increased the speed All materials used in the fabrication of this machine are of standard specification and locally sourced. The estimated cost of producing one unit of the machine is twenty four thousand nine hundred (Rs.24, 900). The machine also eliminated dependency on the epileptic public electric power supply in our rural areas which constitutes the major obstacle in the use of ...

2025

We have many methods to de-husk the coconut. It is by manually, mechanically and also by the use of machines. Manual de-husking with knife is a common practice and there are also different methods of de-husking of coconut using machines such as two blade coconut de-husking machine and coconut de-husking by two roller machines. Various test and observations were conducted on various machines mentioned above among this performance wise the hydraulically operated de-husking machine was found to be more effective and convenient for coconut farmers. This machine can de-husk the coconuts on an average in 11-13 seconds. With 90-95 % of coconut effectively de-husked. Here we have analyzed the machine on basis of its performance to effectively de-husk the coconuts.

2025, Instal No 4/2025

W pracy zawarto opis procesów zachodzących podczas odzysku ciepła jawnego i całkowitego w wymiennikach stosowanych
w systemach wentylacyjnych. Przykładowe przemiany powietrza zachodzące w urządzeniach przedstawiono
na wykresach i-x Molliera. Opisano mechanizm transferu wilgoci w higroskopijnych i niehigroskopijnych wymiennikach
obrotowych. Zaprezentowano wyniki pomiarów przeprowadzonych w warunkach kondensacji, w centrali wentylacyjnej
wyposażonej w obrotowy niehigroskopijny wymiennik obrotowy, pracującej w użytkowanym budynku jednorodzinnym.
Wykazano odzysk wilgoci o sprawności średniej 32% oraz sprawność temperaturową 75%. Dokonano analizy
wpływu parametrów powietrza wewnętrznego i zewnętrznego na sprawność odzysku ciepła, jednak przeprowadzone
pomiary nie pozwoliły na uwidocznienie wszystkich zależności wykazywanych w literaturze.

2025, DergiPark (Istanbul University)

Günümüzde alternatif pişirimlere ve fırınlara örnek olarak kabul edebileceğimiz Mikrodalga fırınlar için tasarlanan Füzyon Fırınlar (Fuseworks Microwave Kiln) düşük sıcaklıkta gelişen cam, seramik gibi malzemeleri kısa sürede pişirmesi ile dikkat çekmektedir. Cam Füzyon çalışmaları için yapılan bu mini fırınlar günümüzde takı, aksesuar gibi küçük objelerin pişirilmesi için kullanılmaktadır. Pişirim ve fırın teknikleri bakımından günümüz sanatçılarına yaratım süreçlerinde alternatif pişirim tekniği sunmaktadır. Ancak bu fırınların kullanımı yaygın olmadığından literatürde fazla bir bilgi bulunmamaktadır. Bu çalışma ile günümüzdeki sanatçılara alternatif bir fırın ve pişirim tekniği sunmak amaçlanmıştır. Bu kapsamda öncelikle tarihsel süreç içerisinde gelişen seramik pişirim teknikleri ve fırınları incelenmiştir. Mikrodalga fırınların seramik sanatı içerisinde nasıl kullanıldıkları araştırılmıştır. Mikrodalga fırınlar için geliştirilen bu küçük ölçekteki fırınlar ile geleneksel pişirim teknikleri olan sır pişirimlerinin farklı killer ve sırlar ile denemeleri yapılmıştır. Bu denemelerin hazırlanma sürecinde elde edilen bilgiler ve deneyimler görsellerle desteklenerek örneklendirilmiştir.

2025

Avaliações Pós–Ocupação têm sido desenvolvidas buscando investigar a qualidade do produto habitação de interesse social que está sendo entregue aos usuários. A análise do número de avaliações desenvolvidas no meio acadêmico e a verificação dos problemas identificados ao longo dos anos têm evidenciado que as informações obtidas por meio dessas avaliações não estão sendo devidamente consideradas para melhoria de futuros empreendimentos habitacionais de interesse social. Nesse contexto, a área de marketing tem sido identificada com potencial para subsidiar melhorias no processo de desenvolvimento das APOs por meio da abordagem dos conceitos de satisfação e de retenção (ou permanência). O principal objetivo desta pesquisa é propor contribuições para Avaliação Pós– Ocupação (APO) em empreendimentos habitacionais de interesse social (EHIS), a partir da análise conjunta da satisfação e da retenção dos usuários (moradores). A população–alvo desta pesquisa faz parte do empreendimento habitac...

2025, DESIGNIO

El cine y el diseño en comunicación visual siempre tuvieron muchas cosas en común, pero nunca como hoy en día en donde el diseñador participa en casi todas la etapas de elaboración de un trabajo audiovisual. Su tarea en esta industria es tan importante que, sin él, faltarían muchos de los elementos que la caracterizan: los títulos de crédito, los afiches, las marcas de productoras y distribuidoras, los ploteos de los vehículos promocionales, etc. Al mismo tiempo la gráfica ya no sólo está constituida por imágenes estáticas sino que puede incorporar movimiento. Esto provoca que también esté presente mediante animaciones y efectos visuales en distintas instancias de la producción.
El póster cinematográfico, a su vez, ha sido por décadas el único y mejor referente de las películas pero no hay duda que su rol actual en la industria audiovisual exige una revisión que lo reivindique apelando a su valor emocional.

2025, International Journal of Economics and Innovation

Mobile banking applications, one of the digital marketing tools, enable users to perform banking transactions quickly and easily. The way to create usable mobile applications is through detailed user experience tests. In user experience tests, eye tracking technique, which can provide reliable and detailed results, stands out. The purpose of this study is to compare the metrics and data outputs of two eye tracking techniques used to measure user experience: glasses-based (TobiiPro) and remote (Realeye) with a webcam. Eleven participants with mobile banking application experience were asked to perform two different tasks. During the procedure, in addition to the eye tracking technique, the system usability scale (SUS) was used as a method, and user opinions were also utilized as part of the think aloud protocol. As the output of the task-based procedure, findings on the mobile application experience were obtained, while the results of the data collected from different eye tracking techniques were also obtained comparatively. While close values were obtained in the average fixation time, it was found that the fixation amounts differed. Due to the differences in the findings between the techniques, it is recommended that further research should be standardized refresh rates across both eye-tracking techniques and test a larger sample to validate these findings.