bluuebunny/crossref_metadata_2025_split huggingface dataset:
Computational design technologies for interior designers: a case study
Authors: Manavis A , Minaoglou P , Tzetzis D , Efkolidis N , Kyratsis P 
Published: January 2021

Abstract
Traditionally interior design is based on the inspiration generated by the designer who acts as an artist and engineer at the same time. Today, a number of digitally developed forms can be used with an aim to offer unusual geometries. Computational design technologies can be used in order to fully automate the generation of a design based on a series of parameters that can be altered within specific limits. In such a way, families of forms and proposals are made available and more opportunities for products dealing with interior design can be produced. These forms require the use of modern 3D printing technologies for their construction due to their geometrical complexity and their digital development. In the present paper, computational design will be presented together with a case study in the area of interior design.
Progressive screw shaft manufacturing technology
Authors: Matejic M , Dragoi M V , Blagojevic M , Filip A C , Miletic I 
Published: January 2021

Abstract
The progressive screw shaft is one of the very challenging part for machining. It might have a decisive influence on the precision of the parts processed by the machine tool. In this paper is presented a new, innovative technology of its manufacturing. The first goal is to develop a technological process for CNC milling machine. Technological process is fully described and with all parameters given and commented. Technology for progressive screw shaft manufacturing is developed in Autodesk Inventor HSM software. The second goal of the paper is a comparative analysis of the here described process for milling the different profile shapes. In the paper are given the milling examples of rectangular and circular profiles. Paper aims to emphasize the advantages and disadvantages of the proposed method. Some conclusions and directions to next research steps are given at the end of the paper.
Optimization of industrial management processes
Authors: Mărgineanu C , Lixăndroiu D 
Published: January 2021

Abstract
The paper aims to present a technique for optimizing industrial management processes by mathematical modeling using linear inequality systems. An issue facing an industrial enterprise regarding production costs will be presented and solved, after which the results will be interpreted to formulate the optimal solution. The main phases of solving a problem with the help of linear programming are presented as well as the detailed analysis of the obtained results. The reduction of costs due to the processes presented in the analysis is presented alternatively with the existing costs and the paper details how to save 336 euros per day, as well as an increase in profit by 1935 euros. At the same time, the paper aims to present a software product to support economic decision modeling with which to perform calculations and present the optimal decision.
Influence of DC05 deep drawing steel real material properties on numerical simulation of incremental forming process
Authors: Nasulea D , Oancea G 
Published: January 2021

Abstract
The finite element method is one of the most useful virtual tools in industrial engineering, which allows quick and cheap predictions and verifications. As it is expected, the FEM simulations are also integrated for incremental forming processes to anticipate different aspects as forming forces, the material stress and strain, dimensional accuracy of parts, or simply to check if the desired part can be manufactured without material failure, before to start the effective manufacturing. The FEM predictions validity is influenced by many aspects of which the most significant are the sheet metal blank material properties. Each sheet blank material has its own mechanical properties, according with material standards, considered to be the theoretical properties. In most of the situations, those theoretical material properties are not matched with the real material properties. In this paper, it is presented the experimental method of determination of the real material properties for DC05 deep drawing steel, based on the tensile strength of the sheet specimens, and the true stress-strain curve which, in fact, represents the real material characteristic curve. A comparison is made between the FEM results, obtained using both, the theoretical and the determined real material properties, and the experimental trials for parts with frustum of a cone shapes.
Designing of an original extruding system for 3D printing of parts made of plastic material in powder-state form
Authors: Păcurar R , Pascu S , Păcurar A , Stan D S , Teuţan E , Băilă D I , Sadeh A 
Published: January 2021

Abstract
Since their advent, various 3D printing technologies have been developed, out of which the Fused Filament Fabrication, FFF has completely revolutionized the industry in the last years. Classical FFF printers are using a thermoplastic filament, which is heated to its melting point and then extruded layer by layer to materialize a three dimensional part. One of the most important subassemblies of the 3D printer which is the most representative is the extrusion sub-assembly system and the thermal demands to which is subjected. In this article, one original constructive variant of the extruding sub-assembly system has been conceived and thermal analyses of the variant was performed by using the finite element method so as to be used not only for printing parts made of plastic materials in filament form, but also plastic materials in the powder state form at the Technical University of Cluj-Napoca, Romania.
Sustainable manufacturing systems – a simulation model
Authors: Parv A L , Deaky B A , Stasiak-Betlejewska R 
Published: January 2021

Abstract
Connecting companies to the paradigm of climate change leads to the creation of sustainable production systems. In this context, new approaches to processes allow the definition of sustainable manufacturing systems. The sustainability of manufacturing systems is an important aspect in order to insure the competitive power of enterprises. In this respect, the manufacturing systems must take into account economic factors, environmental concerns and social directions. Decisions regarding manufacturing development, optimization, or reorganization are driven by many factors and are often costly, with the benefits hard to justify before implementation. This paper describes an agent-based model simulation that analyses the behaviour of a sustainable manufacturing system.
Studies on structural MWCNT/epoxy nanocomposites for EMI shielding applications
Authors: Paun C , Obreja C , Comanescu F , Tucureanu V , Tutunaru O , Romanitan C , Ionescu O , Gavrila D E , Paltanea V Manescu , Stoica V , Paltanea G 
Published: January 2021

Abstract
This paper presents the preparation and characterization of MWCNT - Multi-Walled Carbon Nano-Tube/epoxy nanocomposites, as materials with a good yield for shielding electromagnetic interferences - EMI. Both the precursors used, and the nanocomposites obtained were characterized by different techniques: FTIR - Fourier transform infrared spectroscopy, Raman spectroscopy, SEM - Scanning Electron Microscope and XRD - X-ray diffraction. The electrical and mechanical properties of the nanocomposites were estimated compared to the epoxy resin without addition. Electromagnetic interference shielding tests were conducted in the 2.5 - 6.4 GHz frequency band. The results were found to be promising since for the MWCNT/epoxy sample it was obtained a 20 dB attenuation when compared with the ambient air.
Influence of process parameters on the AWJ cutting of the AL-EN AW 2017A (T4) aluminium alloy
Authors: Radu M C , Schnakovszky C , Chirita B A , Tampu N C , Ciubotariu V A , Herghelegiu E 
Published: January 2021

Abstract
Abrasive water jet machining is an emerging non-conventional technology widely used in different industrial sectors due to its multiple economic and environmental benefits. The quality of processed surface depends on process parameters, abrasive material properties and processed material properties and is mainly expressed by surface roughness, shape and dimensional accuracy of cut, presence of striations and/or burr. The current paper aims to present the influence of water jet pressure and traverse speed on the quality of processed surfaces in the case of AL-EN AW 2017A - T4 aluminium alloy abrasive water jet cutting.
Analysis of scheduling activities in the processes of improving surface characteristics of parts
Authors: Roșu M M , Vlădăreanu L , Iliescu M 
Published: January 2021

Abstract
In the framework of planning and scheduling process for improving surface characteristics the laser cladding process is one of the best solutions, due to the fact that it involves deposition of high-quality material layers by laser radiation. This process is efficient whenever there is the need of improving the surface characteristics of metallic parts, component of products that usually require high cost maintenance because of their severe wear while functioning. This paper presents a time- efficiency analysis of two types of surface properties improving techniques. One is laser cladding and the other is thermal spraying and there are envisaged the work in process time and the availability of capacity in each of the required manufacturing systems. In addition to the efficiency obtained by scheduling activities, the laser cladding process with nano powders ensures a reduction in the use of expensive materials, about 80% compared to traditionally manufacturing, higher productivity and lower energy consumption, about 20% reduction, compared to metallizing. So, compared to various existing solutions, laser nano-cladding technologies are versatile and applicable to various industrial sectors as energy, automotive, mining, food, etc.
Comparison between aluminum alloys behavior in incremental sheet metal forming process of frustum pyramid shaped parts
Authors: Rusu G P , Bârsan A , Popp M O , Maroșan A 
Published: January 2021

Abstract
Single point incremental forming is a new emerging technology, used mainly for prototype development or small series production, with good prospects in industrial implementation. However, the parts manufactured through this process often presents low accuracy, thus the industrial implementation is yet limited. Incremental forming process can be done with the help of different technological equipment, such as industrial robots and numerically controlled machines. Since the process is still in development phase, it is a good practice to use finite element analysis software packages in order to reduce time and costs to produce accurate parts. The aim of this paper is to investigate the behavior of different aluminum alloys deformed through SPIF regarding forming forces, thickness distribution and springback effect. Based on numerical simulations performed, the material which produces the most accurate parts for the frustum cone can be chosen for further experimental research.
Robotized application of assembly and soldering – case study
Authors: Staretu I 
Published: January 2021

Abstract
Robotic assembly is increasingly encountered in various technological processes. This can also be followed by robotic operations such as soldering some components. This paper presents the robotics of two operations to which an electric contactor is subjected. The first operation is the robotic fitting of a rubber bandage. The second robotic operation is the soldering of two electrical contacts. For the transfer of the pieces, a poly-gripper is used and it consists of six grippers with jaws, each of which grasp an electric contactor. This solution was chosen due to the large number of contactors to increase the productivity of the process. The technical projects and 3D models of the gripper and the poly-gripper are shown. For each robotic operation, the structure of the robotic cell is presented and the simulation of the transfer operations of the electrical contactors from the initial positions to the workstations and then to the storage places points of view is shown too.
Stress and vibration analysis of a drone
Authors: Urdea M 
Published: January 2021

Abstract
This paper refers to drones. The development of drones has been extremely fast in the last few years. They can be used in many different areas of military or of civil life, for industrial and agricultural purposes. In some fields this unmanned aerial vehicles may open up new horizons. These vehicles can solve a range of problems, in law enforcement contexts. Their two basic functions are flight and navigation. The purpose of this paper is to present this device, to develop a CAD model of it using SolidWorks and to perform FE analysis study. The drone frame was simulated and analysed in various conditions such as lift and vibration.
Static and dynamic characteristics analysis of self-balancing motorized spindle
Authors: Wang Z , He W Z , Zhou H M , Du S Y 
Published: January 2021

Abstract
In order to effectively suppress the vibration of motorized spindle caused by unbalance fault, realize online dynamic balance control of motorized spindle unit. A self-balancing motorized spindle with dynamic balancing device is designed and the finite element analysis of self-balancing motorized spindle is carried out. The static analysis is carried out, and the static deformation diagram of spindle is obtained after constraint and load are applied. Then modal analysis and harmonic response analysis are carried out, and the first six natural frequencies, mode shapes and displacement frequency curves of spindle are obtained. The results show that: The deformation of motorized spindle is small and rigidity of spindle meets design requirements: Within the working speed range, the spindle will not resonate and work stably and reliably. The rationality and reliability of structure design of self-balancing motorized spindle are verified.
Study on vibration characteristics of motorized spindle based on multi-physics fields
Authors: Zhang K , Wang Z N , Wang Z , Wang Q Y , Ma J 
Published: January 2021

Abstract
Ceramic motorized spindle plays an important role on CNC machine tool. Its dynamic characteristic determines the machining quality of spindle. This paper established a dynamics model of ceramic bearing, and explored the relationship of bearing stiffness and vibration response. The temperature field model of ceramic motorized spindle was established to analyze the temperature field. The motorized spindle air gap influence on unbalanced magnetic pull was studied. The dynamic model of ceramic motorized spindle was established through considering the multiple physical fields influence factors, the changing law of dynamic characteristics was studied. It has been verified by experiments. The average error of ceramic spindle decreased from 5.1% to 2.1%. The establishment of multi-fields dynamic model provided an important guidance for spindle design.
Characteristics of wall heat transfer from impinging diesel spray flame in low oxygen concentration ambient
Authors: Mahmud R , Nishida K , Ogata Y , Kurisu T 
Published: January 2021

Abstract
The objective of this study is to obtain an enhanced understanding of the effect of diesel spray/flame impingement on transient heat flux to the wall. By using a constant volume vessel under engine-like condition, surface heat flux of the wall at spray/flame impingement was measured with three thin film thermocouple heat flux sensors. Fuel was injected using a single-hole injector with a 0.133 mm diameter nozzle. In order to investigate the relation between diesel flame and wall heat loss, two color-method was applied to observe flame temperature distribution. 21 % and 16 % as the various oxygen concentration were investigated at each injection pressure of pressure 80, 120, and 180 MPa. The results showed that the lower oxygen concentration was generated heat loss regardless of injection pressures. The lower flame temperature and flame contact area and period were influence factor on heat loss on the wall. Furthermore, the relation between Nusselt number (Nu) and Reynolds number (Re) were also investigated to understand the heat transfer phenomena in diesel engines.
Possibility of geothermal offshore in Sangihe archipelago, northern part of Sulawesi, Indonesia
Authors: Widiatmoko F R , Dewangga D D , Gustriandy A , Salsabila S , Anggraeni N , Infithor M , Hanifah D , Pratama R A , Kusaeri T H , Zamroni A 
Published: January 2021

Abstract
Mostly geothermal power plant placed around volcano on land. Sangihe Archipelago, the northern of Sulawesi Island known as volcano arc that formed by the subduction of Philippines plate beneath Micro-Sunda plate. The geothermal source is located under sea level, this condition needs some approach of remotely applied sciences. The possibility study is conducted by bathymetry, gravity, magnetic, and regional geology. The objective is searching the high value gravity at the high topography as indication of the magmatic product on the seafloor and the low value of magnetic as indication of the active heat resources. A profile section from Philippines oceanic plate to the Celebes Sea by using each data shown a sequence of subduction product, such as trench, outer-arc ridge, and volcano arc. Geological data is used to know the evidence volcano arc and outer-arc ridge. The volcano arc shows that the age is around Quarter which means it is possible for geothermal resources, the outer-arc ridge shows that the rock contents were melange complex and ultramafic rocks. Sangihe area has possibility for further research as geothermal offshores.
Simplified gasification simulation using zero-dimensional model of empty palm fruit bunch
Authors: Nugroho P N A , Torii S 
Published: January 2021

Abstract
As one of the most efficient biomass conversions, the gasification process is hard to understand because of its complexity. A simplified gasification process simulation using a zero-dimensional model was designed for an empty fruit bunch considering its potential in Indonesia. A stoichiometric equilibrium model was applied to simulate the whole gasification process. Global gasification reaction, mass, and energy balance with two independent chemical reactions are integrated to perform the model. Some sets of linear and nonlinear equations were solved with the Newton Raphson method in Matlab. The output of the model, like syngas composition and the heating value, was validated with available experimental data published. The zero-dimensional thermodynamic equilibrium model could be used to predict the maximum performance of the gasifier and make the gasification process more feasible.
ERP compatibility on business performance through the inventory system and internal integration
Authors: Sebayang P , Tarigan Z J H , Panjaitan T W S 
Published: January 2021

Abstract
The information technology used by companies today is ERP (Enterprise Resources Planning) technology. This study aims to examine the role of ERP compatibility in improving the performance of MM-2100 manufacturing companies. Data is collected at manufacturing companies that have made ERP system adjustments. Data collection was carried out through questionnaires distributed to manufacturing companies, and as many as 78 questionnaires were obtained, which could be further processed. Retrieval of data using questionnaires submitted to the relevant section that has access to company inventory data. Data analysis was performed using the SEM-PLS technique using smart PLS software version 2.0. The results of the study show that ERP compatibility can increase internal information integration and inventory system continuously. However, ERP compatibility has no direct effect on manufacturing performance. Internal integration affects inventory systems and manufacturing performance with coefficients of 0.346 and 0.378, respectively. Internal integration allows other functions to be able to access inventory in the company. The company’s inventory system that is controlled can perform efficiency and effectiveness for the company so that it has an impact on manufacturing performance with a coefficient of 0.766.
Information system planning process design based on clause 8 iso 20000-1:2018 using sysml language
Authors: Aurachman R , Sudianto Y , Utomo N S 
Published: January 2021

Abstract

information systems have become inseparable from current products and services. Improving information systems will add value to the quality of products and services. Some references can be used to produce a good information system. One reference that can be used is ISO 20000-1: 2018. Because of the new standards, there are not many studies that guide the implementation. This paper aims to contribute in providing references for application in aspects of information system planning based on clause 8 ISO 20000-1: 2018. The modelling process uses SysML modelling language. We find the guidance to implementation of this standard and the example of Model Based System Engineering using Block Definition Diagram.
Carte server implementation for improving data quality management application performance in profiling module
Authors: Salmawati K F , Kusumasari T F , Alam E N 
Published: January 2021

Abstract
Data is a critical component in the management of systems that support business in an organization. The application of proper data quality management can help organizations in making policies and maintaining data by reducing inconsistent data. The initial stage in the data quality management process begins with the profiling process. The use of job trigger executors in DQM applications affects the application performance level. This paper aims to make changes to the executor used by using a carte server to improve the performance of the DQM application that has been made. Carte server is a web server that allows running files remotely. The results of this study will compare application performance from the use of different executors namely job trigger (pan.bat) and carte server to find out which is superior. With that knowledge can be obtained about the importance of performance in the application.
Binary Particles Swarm Optimization for Power Plant Schedule by Considering “Take or Pay” Contract
Authors: Wati T , Masfufiah I , Suheta T , Muharom S , Setyawati N E , Triwijaya S 
Published: January 2021

Abstract
This study discuss 24-hours load scheduling to get the minimum generation cost. Fuel cost in load scheduling need to be considered, because fuel and power suppliers are bound by take or pay schedule. In addition load scheduling considering heat rate, start-up cost, minimum up time and minimum down time. Load scheduling calculate by priority list method that is completed using artificial intelligence, Binary Particle Swarm Optimization (BPSO). The data used in this study is IEEE 30 bus and Java-Bali 500 kV.
An experiment on different type of muffler on spark Ignition engine 110 cc performance
Authors: Setyono G , Ulum M , Lillahulhaq Z 
Published: January 2021

Abstract
The design of the exhaust system affects many parameters such as reducing the noise level, control velocity, temperature, back-pressure of exhaust gas and reduce pollution production. The exhaust system has many parts which consist of an exhaust manifold, resonator, catalytic converter, muffler, and connecting pipes. Muffler has the main function as a noise absorber. Furthermore, the temperature distribution on mufflers is also affected by fuel consumption by reducing back-pressure effect. This study has conducted an experiment to determine the effect of modified muffler shape in a motorcycle which consists of standard, scorpion, and 3v3 type. The effects of mufflers’ performance on the motorcycle are described on torque and power graphics. Furthermore, this study explains the muffler geometry effect on noise reduction from the combustion process. The installation of 3v3 muffler decreases torque and power in a motorcycle. Moreover, the installation of 3v3 muffler type raises noise pollution level which generates by the engine combustion process.