scholarly journals Desain Pintu Air Berbantu Komputer Untuk Saluran Irigasi Tersier

2021 ◽  
Vol 5 (3) ◽  
pp. 153-162
Author(s):  
Kukuh Aldi ◽  
Budi Indra Setiawan
Keyword(s):  
Computer Aided Design ◽  
Secondary Data ◽  
Effective Rainfall ◽  
Sluice Gate ◽  
Local Varieties ◽  
Design Time ◽  
Human Creativity ◽  
Computer Device ◽  
Materials Used ◽  
Aided Design

The effort of human creativity in the field of hydraulics in overcoming the problem of irrigation, one of which is using floodgates. The discharge from the floodgates needs to be adjusted to the water needs of the plant. However, due to the long design process, the computer aided design of sluice on tertiary irrigation channels is needed in order to be able to set the optimum dimensions and output discharges of crops water needs with fast design time. The tool used in the form of a computer device with Ms Excel and AutoCAD software and materials used were secondary data, that is water needs of local varieties of rice plants in Mangkung, Rambitan, NTB on an area of 50 ha. The data’s then calculated and the largest discharge is 0.12 m3/s with plant evapotranspiration of 5.10 mm/day and 6.43 mm/day of effective rainfall, meanwhile the smallest is 0.02 m3/s with plant evapotranspiration of 3.17 mm/day and 3.47 mm/day of effective rainfall. The dimensions of the steel sluice gates obtained are width of sluice gate 0.40 m, height of sluice gate is 0.80 m with an estimated cost of making Rp 7,547,000 per one sluice. The dimensions of the GFRP sliding sluice gates are width of sluice gate 0.50 m, height of sluice gate is 0.75 m with an estimated construction cost of Rp 7,547,000 per one sluice.

scholarly journals Awareness Among Dental Undergraduate Students Regarding CAD/CAM Technology—A Survey Report

2019 ◽  
Vol 09 (02) ◽  
pp. 57-63
Author(s):  
Sushmita V. Palanisamy ◽  
Chethan Hegde
Keyword(s):  
Undergraduate Students ◽  
Computer Aided Design ◽  
Sample Selection ◽  
Computer Aided Manufacturing ◽  
The Third ◽  
Survey Report ◽  
Computer Aided ◽  
Cad Cam ◽  
Materials Used ◽  
Aided Design

Abstract Background Contemporary dentistry is advancing toward computer-aided design/ computer-aided manufacturing (CAD/CAM) technology. But the budding dentists are unaware about the advancement. This survey aims at detecting the level of awareness among the undergraduate students and then correlating those results to modify the future curriculum. Objective The study aims (1) to assess the awareness among the dental undergraduate students and (2) to correlate the level of awareness among the third years, final years, and interns. Sample Selection Study sample consist of 300 students (third year students, final year students, and interns) of A. B. Shetty Memorial Institute of Dental Sciences, Mangalore, Karnataka, India. The information of the survey was collected with the help of a questionnaire. Results More than 70% of the students were aware about the basic functioning of CAD/CAM unit and approximately 74% of the students were unaware about the materials used to fabricate the prosthesis using CAD/CAM technology.

scholarly journals Torsional strength of computer-aided design/computer-aided manufacturing–fabricated esthetic orthodontic brackets

2016 ◽  
Vol 87 (1) ◽  
pp. 125-130 ◽  
Author(s):  
Najla Alrejaye ◽  
Richard Pober ◽  
Russell Giordano II
Keyword(s):  
Computer Aided Design ◽  
Resin Composite ◽  
Orthodontic Brackets ◽  
Computer Aided Manufacturing ◽  
Torsional Strength ◽  
Computer Aided ◽  
Ceramic Brackets ◽  
The Mean ◽  
Materials Used ◽  
Aided Design

ABSTRACTObjective: To fabricate orthodontic brackets from esthetic materials and determine their fracture resistance during archwire torsion.Materials and Methods: Computer-aided design/computer-aided manufacturing technology (Cerec inLab, Sirona) was used to mill brackets with a 0.018 × 0.025-inch slot. Materials used were Paradigm MZ100 and Lava Ultimate resin composite (3M ESPE), Mark II feldspathic porcelain (Vita Zahnfabrik), and In-Ceram YZ zirconia (Vita Zahnfabrik). Ten brackets of each material were subjected to torque by a 0.018 × 0.025-inch stainless steel archwire (G&H) using a specially designed apparatus. The average moments and degrees of torsion necessary to fracture the brackets were determined and compared with those of commercially available alumina brackets, Mystique MB (Dentsply GAC).Results: The YZ brackets were statistically significantly stronger than any other tested material in their resistance to torsion (P < .05). The mean torques at failure ranged from 3467 g.mm for Mark II to 11,902 g.mm for YZ. The mean torsion angles at failure ranged from 15.3° to 40.9°.Conclusion: Zirconia had the highest torsional strength among the tested esthetic brackets. Resistance of MZ100 and Lava Ultimate composite resin brackets to archwire torsion was comparable to commercially available alumina ceramic brackets.

Neural Networks for Modeling the Contact Foot-Shoe Upper

2010 ◽  
pp. 561-573
Author(s):  
M. J. Rupérez ◽  
J. D. Martín ◽  
C. Monserrat ◽  
M. Alcañiz
Keyword(s):  
Neural Networks ◽  
Computer Aided Design ◽  
Characteristic Curve ◽  
Neural Model ◽  
Computer Aided ◽  
Materials Used ◽  
Aided Design ◽  
Footwear Design ◽  
The Relationship

Recently, important advances in virtual reality have made possible real improvements in computer aided design, CAD. These advances are being applied to all the fields and they have reached to the footwear design. The majority of the interaction foot-shoe simulation processes have been focused on the interaction between the foot and the sole. However, few efforts have been made in order to simulate the interaction between the shoe upper and the foot surface. To simulate this interaction, flexibility tests (characterization of the relationship between exerted force and displacement) are carried out to evaluate the materials used for the shoe upper. This chapter shows a procedure based on artificial neural networks (ANNs) to reduce the number of flexibility tests that are needed for a comfortable shoe design. Using the elastic parameters of the material as inputs to the ANN, it is possible to find a neural model that provides a unique equation for the relationship between force and displacement instead of a different characteristic curve for each material. Achieved results show the suitability of the proposed approach.

scholarly journals Parametric representation of turbine blades and vanes internal cooling geometry

2021 ◽  
Author(s):  
Jamal Zeinalov
Keyword(s):  
Computer Aided Design ◽  
Design Methodology ◽  
Parametric Design ◽  
Turbine Blades ◽  
Parametric Representation ◽  
Internal Cooling ◽  
Design Time ◽  
Depth Analysis ◽  
The Subject ◽  
Aided Design

Modern turbine blades and vanes possess very complex internal geometry. As a result of this complexity the design through conventional means, such as a Computer Aided Design (CAD) package, can take a large portion of the allocated time, preventing thorough testing and optimization. The aim of this thesis is to produce a parametric design methodology that can be used to create turbine blade and vane geometry from designer-specified parameters. This work includes a thorough study of the current blade and vane design process, an in-depth analysis of the most commonly used geometry represention methodologies, as well as a review of existing works on the subject. The research code, based on the created design methodology, was tested on the existing blade and vane design schemes. The result of this comparison is presented. The developed methodology can be used to shorten the design time necessary to produce the blade and vane geometry, thereby increasing the time available for analysis and optimization.

scholarly journals Evaluation of Different Materials Used for Fabrication of Complete Digital Denture

2018 ◽  
Vol 55 (1) ◽  
pp. 124-128 ◽  
Author(s):  
Claudia Florina Andreescu ◽  
Doina Lucia Ghergic ◽  
Oana Botoaca ◽  
Violeta Hancu ◽  
Andreea Mariana Banateanu ◽  
...  
Keyword(s):  
Rapid Prototyping ◽  
Polymethyl Methacrylate ◽  
Computer Aided Design ◽  
Complete Denture ◽  
Computer Aided Manufacturing ◽  
Computer Aided ◽  
Cad Cam ◽  
Materials Used ◽  
Aided Design ◽  
Digital Denture

Utilization of computer-aided design/computer-aided manufacturing (CAD/CAM) rapidly increases in dental medicine. Making of computer-engineered complete denture is based on scanning of patient data, designing of prosthesis and milling or rapid prototyping. This is digital denture, term that includes innovative devices, software programmes and corresponding materials. Industrially polymerized cross-linked polymethyl methacrylate (PMMA) is the material used for fabrication of digital denture. The aim of this study is to analyze the different cross-linked PMMA used for fabrication of CAD/CAM complete denture.

Dental materials

2020 ◽  
pp. 647-685
Keyword(s):  
Computer Aided Design ◽  
Dental Materials ◽  
Composite Resins ◽  
Dental Ceramics ◽  
Casting Alloys ◽  
Acrylic Resins ◽  
Impression Materials ◽  
Computer Aided ◽  
Materials Used ◽  
Aided Design

This chapter investigates the materials used in dentistry today. This includes the properties of dental materials, amalgam, and composite resins. Enamel and dentine bonding are discussed, along with dentine-adhesive systems, glass ionomers and composite-based products, and cements. Impression materials and techniques are considered, along with casting alloys, wrought alloys, dental ceramics, and computer-aided design (CAD) and computer-aided manufacture (CAM). The chapter concludes with a look at denture materials, from acrylic resins to rebasing, and the safety of dental materials.

Computer Aided Aero-Thermodynamic Design for Impellers

2006 ◽  
Author(s):  
Sarim N. Al-Zubaidy
Keyword(s):  
Computer Aided Design ◽  
Total Pressure ◽  
Radial Flow ◽  
Pressure Ratio ◽  
Inverse Approach ◽  
Design Time ◽  
Performance Requirements ◽  
Computer Aided ◽  
Aided Design ◽  
Total Pressure Ratio

The complete design of radial flow turbomachinery rotors invariably requires the aero-thermodynamic, structural and the manufacturing criteria to be satisfied simultaneously. In recent years, a number of computer aided design and geometry description procedures for centrifugal impellers have been developed. Essentially the detailed geometry generation in most of these codes operates in an iterative mode. The main drawback of such approaches is that the decision whether or not a particular step produces best results tends to be made arbitrarily. Moreover, it is not a simple matter to know what changes in the geometry would produce the desired results. This paper employs an inverse approach, which is based on a prescribed mean streamline deceleration schedule to generate the discrete geometry of centrifugal impellers for given performance requirements. The approach does not claim to offer a comprehensive solution of the aero-thermodynamic design problem of impellers but rather attempt to advance a methodology that is capable of generating designs that can theoretically produce maximum attainable total-to-total pressure ratio and improved efficiency with reduced design time. The systematic deployment of the proposed approach can also be utilized as a tool to explain differences in performance of centrifugal impellers that seemed alike under careful qualitative inspection.

scholarly journals Design Procedure of a Topologically Optimized Scooter Frame Part

Symmetry ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 755 ◽  
Author(s):  
Lukas Jancar ◽  
Marek Pagac ◽  
Jakub Mesicek ◽  
Petr Stefek
Keyword(s):  
Computer Aided Design ◽  
Computing Time ◽  
Design Procedure ◽  
Parametric Surfaces ◽  
Design Time ◽  
Calculation Results ◽  
Time Savings ◽  
Aided Design ◽  
Method Analysis

This article describes the design procedure of a topologically optimized scooter frame part. It is the rear heel of the frame, one of the four main parts of a scooter made with stainless steel 3D printing. The first part of the article deals with the design area definition and the determination of load cases for topology calculation. The second part describes the process of the topology optimization itself and the creation of the volume body based on the calculation results. Finally, the final control using an FEM (Finite Element Method) analysis and optimization of created Computer-Aided Design (CAD) data is shown. Part of the article is also a review of partial iterations and resulting versions of the designed part. Symmetry was used to define boundary conditions, which led to computing time savings, as well as during the CAD model creation, where non-parametric surfaces were mirrored to shorten the design time.

scholarly journals Assessment of Force Retention between Milled Metallic and Ceramic Telescopic Crowns with Different Taper Angles Used for Oral Rehabilitation

Materials ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 4814
Author(s):  
Caroline Adela Ingrid Fischer ◽  
Doina Lucia Ghergic ◽  
Diana Maria Vranceanu ◽  
Stefan Alexandru Ilas ◽  
Raluca Monica Comaneanu ◽  
...  
Keyword(s):  
Computer Aided Design ◽  
Mechanical Tests ◽  
Oral Rehabilitation ◽  
Taper Angle ◽  
Specific Protocol ◽  
Computer Aided ◽  
Cad Cam ◽  
Abutment Teeth ◽  
Materials Used ◽  
Aided Design

The present study assessed the retention forces corresponding to different telescopic systems used in removable prosthetic dentures. The telescopic systems were represented by Co–Cr alloy or zirconia-based primary crowns and Co–Cr secondary crowns. All crowns were manufactured using computer-aided design/computer-aided manufacturing technology (CAD/CAM). Two types of reference abutment teeth (upper canine and first upper molar) were selected in order to obtain the telescopic crowns and two taper angles—of 0° and 2°—were used for the design of the crowns. A number of 120 samples of telescopic crowns were obtained and subjected to mechanical tests, following a specific protocol, on a mechanical testing equipment. The retention of the telescopic systems was evaluated for different sets of cycles (up to 360), represented by movements that simulate the intraoral insertion and disinsertion of the telescopic systems. The present study highlights that the telescopic systems in which the primary crown is made of zirconia ceramics presents more advantages than those made of Co–Cr. All telescopic systems studied, highlighted that by modifying the taper angle from 0° to 2°, the retention forces have decreased, irrespective of the materials used for the fabrication of the primary crown, suggesting that by using a taper angle of 0°, which is known to be ideal, more efficient, and reliable prosthesis can be developed. Thus, even though the ceramic–metallic telescopic system exhibited the highest retention, all telescopic crowns evaluated registered values between 2–7 N, indicating that they are suitable for clinical use.

Insertion force analysis of compliantly supported peg-in-hole assembly

2017 ◽  
Vol 37 (3) ◽  
pp. 285-295 ◽  
Author(s):  
Nagarajan Pitchandi ◽  
Saravana Perumaal Subramanian ◽  
Muhilan Irulappan
Keyword(s):  
Computer Aided Design ◽  
Initial Contact ◽  
Assembly Model ◽  
Insertion Force ◽  
Content Type ◽  
Initial Stage ◽  
Materials Used ◽  
Numerical Solver ◽  
Aided Design ◽  
Insertion Process

Purpose This paper aims to estimate the required insertion force and to analyze the influence of damping in a compliantly supported chamfered peg-in-hole assembly under dynamic conditions. Design/methodology/approach A mathematical model of the insertion process, including damping coefficient and stiffness of the compliance, insertion speed, mass, inertia and friction coefficient, has been developed. Computer aided design (CAD) model of the peg-in-hole assembly environment with passive compliance is created. The dynamic insertion force of the modeled environment is analyzed using multibody dynamics numerical solver. Findings The damping property of the viscoelastic materials used in the passive compliances suppresses the vibration caused due to the impulses in the transition of the peg in hole. It also increases the insertion force required for the peg insertion at the initial stage. Research limitations/implications As the search strategies are not considered in this work, it is assumed that the initial contact is ensured between the chamfer and the peg of the assembly. A constant insertion speed is maintained throughout the insertion. Otherwise, it could have been varied at different stages of the insertion for reducing the assembly time. Practical implications The developed assembly model can be used for predicting the insertion forces of a chamfered peg-in-hole assembly and for designing/selecting the compliance device for the required assembly environment. Originality/value The proposed insertion model has considered the damping and elastic property of the compliance material as a parallel arrangement of spring and dashpot. This approach aids in modeling an insertion process closer to real-time assembly process.

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