A Process Planning Method for Improving the Build Performance in Stereolithography

1999 ◽  
Author(s):  
Aaron P. West ◽  
David W. Rosen
Keyword(s):  
Process Planning ◽  
Planning Method ◽  
Analytical Models ◽  
Multi Objective Optimization ◽  
Process Variables ◽  
Build Time ◽  
Insight Into ◽  
Conflicting Goals ◽  
Selection Of

Abstract A process planning method is presented in this paper to aid stereolithography users in the selection of appropriate values of build process variables in order to achieve specific goals and characteristics that are desirable in the end prototype. To accomplish this, user-defined input in the form of goal preferences and feature tolerances are used to control how the prototype will be built by way of process planning. The user inputs will be used to drive the creation of the process plan so that a prototype is produced, which reflects the intent of the operator. The process planning method is adapted from multi-objective optimization and utilizes empirical data, analytical models, and heuristics to quantitatively relate build process variables to goals of surface finish, accuracy, and build time. The objective is to render decision support by handling tradeoffs among conflicting goals quantitatively and give the user some degree of insight into what quality of prototype may ultimately be produced. The process planning method is demonstrated on a part with non-trivial geometric features.

Elements and Materials Improve the FDM Products: A Review

2016 ◽  
Vol 16 ◽  
pp. 33-51 ◽  
Author(s):  
Abduladim Salem Bala ◽  
Saidin bin Wahab ◽  
Mazatusziha binti Ahmad
Keyword(s):  
Matrix Material ◽  
Process Parameter ◽  
Correct Selection ◽  
Complex Environment ◽  
Technology Process ◽  
The Matrix ◽  
Additive Materials ◽  
Insight Into ◽  
Selection Of

This work aims to provide a review of available published literature that explores the opportunities to improve the quality of fused deposit modelling (FDM) products, particularly in medical applications. The paper presents details concerning the basis of the technology, process parameter settings and their responses, and reviews the properties of common FDM engineering/bio-materials and the available methods applied for improving their performance. Based on the researches which have been reviewed, FDM technology works within a complex environment from process parameters. Thus, it can achieve good results only with the proper settings for these parameters according to the properties of the material used. Improving the polymers is essentially based on the correct selection of additive materials, which can particularly enhance the key property/properties in the matrix material. This review provides a brief insight into FDM technology, provides an idea of the process parameter settings, the available materials and ways of modifying their properties to consequently improve the quality of FDM products.

ANALISIS SISTEM PENDUKUNG KEPUTUSAN DALAM MENYELEKSI PROPOSAL PROGRAM KREATIVITAS MAHASISWA PENELITIAN TERBAIK DI AMIK TUNAS BANGSA PEMATANGSIANTAR DENGAN METODE MOORA

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Winanda Alifah ◽  
Solikhun Solikhun ◽  
Muhammad Ridwan Lubis
Keyword(s):  
Decision Support ◽  
Student Affairs ◽  
Support System ◽  
Private University ◽  
Ratio Analysis ◽  
Multi Objective Optimization ◽  
Directorate General ◽  
Moora Method ◽  
Selection Of

The Student Creativity Program is the most awaited activity for every state and private university in Indonesia. In this activity each college tried to send as many research proposals as possible with the aim of winning this PKM activity and the hope to improve the quality of a lecturer and student at the college. This PKM activity is included in a prestigious activity because this activity is organized by the Directorate General of Learning and Student Affairs. Therefore AMIK Tunas Bangsa as a private university also wants to participate in PKM activities, especially in the field of research. In 2017 many Tunas Bangsa AMIK students participated in the research proposal submission. With so many students who want to participate, make the lecturers select first proposals that are considered good or feasible before being uploaded on the PKM page. To facilitate the selection of the proposal, the Decision Support System using the MOORA method (Multi Objective Optimization on the Basic Ratio Analysis) is used in the hope of obtaining proposals that are truly feasible to submit to PKM-P activitiesKeywords: SPK, MOORA, Selection of PKM-Research Proposals   The Student Creativity Program is the most awaited activity for every state and private university in Indonesia. In this activity each college tried to send as many research proposals as possible with the aim of winning this PKM activity and the hope to improve the quality of a lecturer and student at the college. This PKM activity is included in a prestigious activity because this activity is organized by the Directorate General of Learning and Student Affairs. Therefore AMIK Tunas Bangsa as a private university also wants to participate in PKM activities, especially in the field of research. In 2017 many Tunas Bangsa AMIK students participated in the research proposal submission. With so many students who want to participate, make the lecturers select first proposals that are considered good or feasible before being uploaded on the PKM page. To facilitate the selection of the proposal, the Decision Support System using the MOORA method (Multi Objective Optimization on the Basic Ratio Analysis) is used in the hope of obtaining proposals that are truly feasible to submit to PKM-P activities.Keywords:SPK, MOORA, Selection of PKM-Research Proposals

scholarly journals Optimizing schedules for the VLBI global observing system

2020 ◽  
Vol 94 (1) ◽  
Author(s):  
Matthias Schartner ◽  
Johannes Böhm
Keyword(s):  
Large Scale ◽  
Optimization Problem ◽  
Very Long Baseline Interferometry ◽  
Proper Selection ◽  
Long Baseline ◽  
Weight Factors ◽  
Highly Correlated ◽  
Insight Into ◽  
Selection Of

AbstractVery long baseline interferometry (VLBI) scheduling is a challenging optimization problem. With the development of the new VLBI global observing system (VGOS) consisting of smaller but very fast slewing antennas, new opportunities arise. In this work, we give a deep insight into optimized VGOS scheduling using a newly developed VLBI scheduling software called VieSched, and we show how different scheduling parameters and approaches affect the precision of geodetic results. Therefore, the results of over one thousand generated schedules and over one million simulated sessions are analyzed. The simulations reveal that the most important parameters to optimize VGOS schedules with VieSched are the so-called weight factors. A proper selection of individually optimized weight factors can improve the quality of a schedule significantly. It is shown that the values of the weight factors used to generate the schedule are highly correlated with the expected precision of the geodetic parameters. We highlight the benefit of selecting schedules based on large-scale Monte Carlo simulations and show why scheduling statistics like the number of observations or the sky-coverage are not necessarily the best metric to evaluate schedules.

scholarly journals Chemistry in Serbian journals in the second half of the 19th century

2008 ◽  
Vol 62 (5) ◽  
pp. 305-312
Author(s):  
Stanko Cvjeticanin ◽  
Ruza Halasi ◽  
Tibor Halasi ◽  
Jasna Adamov
Keyword(s):  
19Th Century ◽  
General Public ◽  
Historical Survey ◽  
Scientific Content ◽  
Historical Method ◽  
Textual Content ◽  
The 19Th Century ◽  
Insight Into ◽  
Selection Of

The aim of this paper is selection and analysis of articles with chemistry content in selected Serbian journals in the second half of the 19th century, which were aimed towards general public, in order to get insight into the level and quality of additional chemistry informing of readers. Two journals were selected, that contained entertaining, literature and scientific content ('Sedmica' and 'Vila'), and two other, with entertainment and literature nature ('Danica' and 'Matica'). The analyzed journals primarily addressed the general public and played an important role in readers' information and education. Historical method was applied in this research. The above-mentioned journals were analyzed separately, with the short historical survey. Complete editions of these journals were analyzed, and the selection of articles was made according to the textual content or the title itself. The chemistry content presented in these journals is of the great variety. Among other things, interesting comments of the chemical schoolbooks are found, as well as lectures on science.

scholarly journals Pemilihan Material dan Desain yang Inovatif serta Kreatif

2022 ◽  
Vol 5 (1) ◽  
pp. 1-6
Author(s):  
Muhammad Budi Haryono ◽  
Rizal Dwi Bayuna ◽  
Syahrul Mahfudli Rohman ◽  
Adetia Rizki Wardana ◽  
Nashirul Umam
Keyword(s):  
Production Process ◽  
Community Service ◽  
Material Selection ◽  
Production Costs ◽  
Machine Design ◽  
Public Knowledge ◽  
Creative Design ◽  
Insight Into ◽  
Selection Of

Abstract: Material selection and innovative and creative designs are needed as a medium for reducing production costs by changing the design of a product but still paying attention to the safety of its users. The problem that occurs in the surrounding community is the lack of public knowledge about the selection of materials that can risk accidents that will be experienced by users which can be caused by the material not being strong enough to support the load it gets. Innovative and creative design aims to reduce the mass of the material but still refers to user safety. Inappropriate design can increase the risk of accidents and wasted costs in the production process. The method used in this community service is a material selection workshop and an introduction to machine design using solidworks software. Therefore, this community service will greatly help the community in the Karang-tempel Village, East Semarang District, increase their insight into the selection of materials and innovative designs as an increase in the quality of production and ensure the safety of users.          Keywords: creative; desain; inovative; material selection; workshop Abstrak: Pemilihan material dan desain yang inovatif dan kreatif sangat diperlukan sebagai media pengurangan biaya produksi dengan merubah rancangan suatu produk akan tetapi tetap memperhatikan keselamatan dari penggunanya. Permasalahan yang terjadi di masyarakat sekitar akan kurangnya pengetahuan masyarakat tentang pemilihan material yang dapat berisiko akan terjadinya kecelakaan yang akan dialami pengguna yang dapat disebabkan oleh material tidak cukup kuat untuk menopang beban yang didapatkannya. Desain yang inovatif dan kreatif bertujuan sebagai pengurangan massa dari material akan tetapi tetap merujuk kepada keselamatan pengguna. Desain yang tidak sesuai dapat meningkatkan risiko kecelakaan dan pemborosan biaya pada proses produksi. Metode yang digunakan pada pengabdian masyarakat ini adalah workshop pemilihan material dan pengenalan rancang bangun mesin menggunakan software solidworks. Oleh karena itu pengabdian kepada masyarakat ini akan sangat membantu mas-yarakat di lingkungan kelurahan Karang-tempel, kecamatan Semarang Timur untuk menambah     wawasannya terhadap pemilihan material dan desain yang inovatif sebagai peningkatan kualitas hasil produksi dan menjamin keselamatan dari pengguna.Kata kunci: desain; inovatif; kreatif; pemilihan material; workshop

Research on Process Planning Method of NC Tube Bending

2011 ◽  
Vol 411 ◽  
pp. 393-397 ◽  
Author(s):  
Jin Rong Zhang ◽  
Feng Li ◽  
Qiang Zhu ◽  
Yong Jun Wang
Keyword(s):  
Process Planning ◽  
Planning Process ◽  
Process Analysis ◽  
Planning Method ◽  
Tube Bending ◽  
Factors Affecting ◽  
Bending Process ◽  
New Process ◽  
Optimal Set

In order to improve efficiency and quality of tube process, a new process planning method for NC tub bending is proposed. Factors affecting NC tube bending process is firstly discussed, and NC bending process planning is also achieved by theoretical process set calculation, occurrence of interference processes set analysis, clamping difficult process analysis and optimal set of processes selection. The method above is effective and useful for planning process of the complex tube bending parts.

ON THE EXPERT’S RIGHT TO BE PRESENT AT LEGAL PROCEEDINGS

2016 ◽  
Vol 15 ◽  
pp. 163-171
Author(s):  
M. G. Shcherbakovskiy
Keyword(s):  
Initial Data ◽  
Legal Proceedings ◽  
Reliable Assessment ◽  
Data Acquiring ◽  
Selection Of

The article discusses the reasonsfor an expert to participate in legal proceedings. The gnoseological reason for that consists of the bad quality of materials subject to examination that renders the examination either completely impossible or compromises objective, reasoned and reliable assessment of the findings. The procedural reason consists ofa proscription for an expert to collect evidence himself or herself. The author investigates into the ways of how an expert can participate in legal proceedings. If the defense invites an expert to participate in the proceedings, then it is recommended that his or her involvement should be in the presence of attesting witnesses and recorded in the protocol. In the course of the legal proceedings an expert has the following tasks: adding initial data, acquiring new initial data, understanding the situation of the incident, acquiring new objects to be studied, including samples for examination. An expert’s participation in legal proceedings differs from the participation of a specialist or an examination on the scene of the incident. The author describes the tasks that an expert solves in the course of legal proceedings, the peculiarities ofan investigation experiment practices, the selection of samples for an examination, inspection, interrogation.

Implementasi Voip Server Berbasis IPV6 Dengan Raspberry PI

2019 ◽  
Vol 9 (01) ◽  
pp. 47-54
Author(s):  
Rabbai San Arif ◽  
Yuli Fitrisia ◽  
Agus Urip Ari Wibowo
Keyword(s):  
Internet Protocol ◽  
Wireless Transmission ◽  
Raspberry Pi ◽  
Test Results ◽  
Average Delay ◽  
Ipv6 Network ◽  
Ip Network ◽  
Selection Of ◽  
Better Than

Voice over Internet Protocol (VoIP) is a telecommunications technology that is able to pass the communication service in Internet Protocol networks so as to allow communicating between users in an IP network. However VoIP technology still has weakness in the Quality of Service (QoS). VOPI weaknesses is affected by the selection of the physical servers used. In this research, VoIP is configured on Linux operating system with Asterisk as VoIP application server and integrated on a Raspberry Pi by using wired and wireless network as the transmission medium. Because of depletion of IPv4 capacity that can be used on the network, it needs to be applied to VoIP system using the IPv6 network protocol with supports devices. The test results by using a wired transmission medium that has obtained are the average delay is 117.851 ms, jitter is 5.796 ms, packet loss is 0.38%, throughput is 962.861 kbps, 8.33% of CPU usage and 59.33% of memory usage. The analysis shows that the wired transmission media is better than the wireless transmission media and wireless-wired.

DESIGN, SIMULATION AND IMPLEMENTATION MONITORING SYSTEM FOR SYSTEM CONTROL C4 FEEDING PUMP FOR FEED VAPORIZATION IN THE BUTADIENE PLANT

2020 ◽  
Vol 1 (1) ◽  
pp. 31-35
Author(s):  
Fahmi Yunistyawan ◽  
Yunistyawan J Berchmans ◽  
Gembong Baskoro
Keyword(s):  
Motor Control ◽  
Control System ◽  
Field Operator ◽  
System Control ◽  
Variable Speed ◽  
Variable Speed Drive ◽  
Software And Hardware ◽  
Discharge Pressure ◽  
Selection Of

This study implements the auto start control system on an electric motor 3 phase C4Feeding pump when the discharge pressure is low-low (4.3 kg /cm²). The C4 feeding pumpmotor was initially manually operated from the local control station, this was very ineffectiveand inefficient because it still relied on the field operator to operate the pump motor and whenthe plant was in normal operating it is very risk if the field operator late to operate motor then itwill impact to quality of the product, and if the delay time to operate motor is too long then planthave to shut down, therefore improvement is needed in the C4 feeding pump motor controlsystem. In this paper, various types of 3-phase motor control are explained which allow it to beapplied to the C4 feeding pump motor that are on-off, inverter, and variable speed drive andefficient selection of the three systems control of the motor. Software and hardware used in thisthesis work are DCS CENTUM VP Yokogawa.

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