Rancang Bangun Mesin Pengayak Pasir Untuk Meningkatkan Produktivitas Pengayakan Pasir Pada Pekerja Bangunan

2019 ◽  
Vol 11 (01) ◽  
pp. 8-13
Author(s):  
Angga Sateria ◽  
Eko Yudo ◽  
Zulfitriyanto Zulfitriyanto ◽  
Sugiyarto Sugiyarto ◽  
Rina Melati ◽  
...  
Keyword(s):  
Sand Particle ◽  
Uniform Size ◽  
Human Power ◽  
Building Process ◽  
Design Software ◽  
Materials Used

One of the materials used in the building process is sand particle. Sand with uniform size is generally obtained from manual sifting processes that require a lot of human power and long sieving time, so a sand sieving machine is needed to minimize the use of human power and sieving time. The design is focused on sifting sand manually into sieving using a machine. The design of the machine uses design software to create a picture of the arrangement and working drawings of the components of the sand sieving machine. Based on the results of the trials that have been carried out, the machine can sift 5 kg of sand for 1.02 minutes and for 10 kg of sand can be sifted for 1.30 minutes.

An Analysis on Virtual Material Making and its Application in 3D Animation Designs

2011 ◽  
Vol 211-212 ◽  
pp. 1172-1175 ◽  
Author(s):  
Jie Fang
Keyword(s):  
Computer Games ◽  
Rapid Development ◽  
Three Dimensional ◽  
Pop Culture ◽  
3D Animation ◽  
Special Effects ◽  
Animation Industry ◽  
Computer Based ◽  
Design Software ◽  
Materials Used

Three-dimensional animation is one of the greatest contributions made by computer sciences to the animation industry. The 3D animation has been widely used in movie special effects, commercials, computer games and computer-based education (CBE), and has become a well-known form of art in the world's pop culture. The rapid development of 3D animation also brings about fundamental changes in the materials used in animation production. This paper gives an introduction of the virtual materials in 3D animation, as well as the tools needed and methods of making the materials using 3D animation design software, especially Maya.

scholarly journals LABORATORY INVESTIGATION AND EFFICIENCY OF DEICING MATERIALS USED IN ROAD MAINTENANCE

Transport ◽  
2016 ◽  
Vol 31 (2) ◽  
pp. 147-155 ◽  
Author(s):  
Andrius Ružinskas ◽  
Matas Bulevičius ◽  
Henrikas Sivilevičius
Keyword(s):  
Laboratory Investigation ◽  
Winter Period ◽  
Road Maintenance ◽  
Ice Melting ◽  
Uniform Size ◽  
Ambient Temperatures ◽  
Car Accidents ◽  
Effective Removal ◽  
Efficiency Performance ◽  
Materials Used

Snow and ice cause considerable traffic problems on roads and streets in the winter period. Timely and effective removal of these problems can prevent major car accidents. This paper presents an analysis of the efficiency of Deicing Materials (DMs) used by the Lithuanian road maintenance agencies. Five different DMs were studied by performing ice melting tests in the laboratory. DMs were evenly spread on the formed ice samples taking the same amount of grains of uniform size. The ice mass dissolved by each DM was determined at different durations of melting action, ranging from 4 to 120 min, and at different ambient temperatures, ranging from –20 to –3 °C. The obtained results of each DM were analysed, and all the tested materials were compared under different temperature conditions. In addition, the deicing speed of each DM was calculated, and the DM was categorized according to the efficiency performance. A comparison of tested DM efficiencies was carried out, and the price of one percent of melted ice was determined.

scholarly journals Construction and Simulation of a Planar Transformer Prototype

2021 ◽  
Vol 2 (2) ◽  
pp. 1-7
Author(s):  
Sebastián Guarín ◽  
Sergio Velarde ◽  
Edwin Castaño ◽  
Alexander Molina-Cabrera
Keyword(s):  
High Frequency ◽  
Simulation Software ◽  
Magnetic Flux Density ◽  
Ferrite Core ◽  
The Core ◽  
Transformation Ratio ◽  
Building Process ◽  
Pcb Design ◽  
Design Software ◽  
Transformer Output

This paper illustrates the design and building of a planar transformer prototype with a 1:1 transformation ratio for high-frequency applications in power electronics. By using reference literature and considering the ferrite core dimensions, the windings were conceived and exported to Gerber format using PCB design software. The transformer prototype was then assembled and tested under laboratory conditions for frequencies from 800 Hz to 5 MHz, which showed a sinusoidal wave at the transformer output from 1.3 kHz onwards and a better performance starting at 10 kHz, where the loses were significantly reduced and the transformation ratio was closer to the originally designed. As a final step, a finite element method (FEM) análisis was carried out to understand the electromagnetic flux behavior using a 3D Multiphysics simulation software. The 3d building process and details are explained step by step and the resulting magnetic flux density is graphically shown for the core and the windings.

Improve Light Weight Concrete Characteristics by Adding Paraffin Wax as Moisture Proof

2019 ◽  
Vol 972 ◽  
pp. 16-25
Author(s):  
Shamel Abdul Raheem ◽  
Majeed Abdul Saheb ◽  
Hayder Hussein Moula ◽  
Baydaa Hussain Maula ◽  
Ruaa Adnan Alshreefi ◽  
...  
Keyword(s):  
Concrete Block ◽  
Good Alternative ◽  
Constructional Material ◽  
Paraffin Wax ◽  
Light Weight ◽  
Essential Information ◽  
Human Thought ◽  
Building Process ◽  
Light Weight Concrete ◽  
Materials Used

The development of structural materials used in the building process is certainly subject to the local and temporal potentials and to how the extent to which the human thought made in the scientific and industrial field. Where the constructional methods that depend on pottery, bricks were and still essentially adopted. The advanced human thought attempted making more efforts to find constructional materials of certain specifications. Porous concrete Light Weight Concrete (LWC) is considered a good alternative constructional material in addition to its light weight and good thermal isolation. It is currently used in Iraq as concrete block to form breakers only. This research includes essential information about LWC and developing it through the adding paraffin wax to generate a material of high moisture isolation, low absorption rate and high bearing for compressive forces especially after overflowing it with wax.

scholarly journals Design of Rotary Dryer for Sand Drying using Biomass Energy Sources

2021 ◽  
Vol 226 ◽  
pp. 00024
Author(s):  
Herry Susanto ◽  
Roy Hendroko Setyobudi ◽  
Didik Sugiyanto ◽  
Yefri Chan ◽  
Erkata Yandri ◽  
...  
Keyword(s):  
Water Content ◽  
Combustion Process ◽  
Biomass Energy ◽  
Energy Sources ◽  
Drying Process ◽  
Human Power ◽  
Rotary Dryer ◽  
Materials Used ◽  
Design Calculations

Hebel brick is used in making the walls of the house. One of the materials used in making hebel bricks is sand. The water content of the sand will affect the quality of the hebel bricks. The less water content in the sand, the better the quality of hebel bricks. In order to get sand with a little water content, it is necessary to do the drying process. To overcome this problem, a rotary dryer for sand drying using renewable energy, particular biomass energy sources was designed. It can be placed in a sand quarry near a river or near a beach. It is designed to have the ability to dry the wet sand by putting it in a rotary dryer, making this drying system usable both in sunny and rainy conditions. The drying process can take place continuously using heat from biomass energy. The heat is produced from the combustion process in the biomass furnace and then distributed to the rotary dryer. The advantage of this rotary dryer system could be done continuously with a little human power. Moreover, from these calculations can be analyzed the performance of this rotary dryer machine, to determine the suitability between design calculations and test results.

scholarly journals Challenges of BIM technology application in project planning

2018 ◽  
Vol 10 (2) ◽  
pp. 15-28 ◽  
Author(s):  
Leonas Ustinovičius ◽  
Arūnas Puzinas ◽  
Jovita Starynina ◽  
Mantas Vaišnoras ◽  
Oksana Černiavskaja ◽  
...  
Keyword(s):  
Design Research ◽  
Investment Project ◽  
Project Planning ◽  
Technology Application ◽  
Technology Project ◽  
Building Process ◽  
Other Information ◽  
Design Software ◽  
Interchange Format ◽  
Information Interchange

Abstract The study aimes at identification of the difficulties in choosing the correct concept of the main building process. The use of a proper BIM design may help the user avoid mistakes and make the building process faster as well as less financial resource intensive. The authors focused on literature review, analysing the difficulties of the BIM design software technology in construction project planning. The biggest flaws in BIM design are inherent in three building process stages: 1) the preparation of a building investment project, and the analysis of the existing situation; 2) the preparation of the building execution technology project; 3) the existing standard processing and information collection in building exploitation period. The analysis shows a persistent need for a deeper BIM design research, to improve information interchange formats that would ensure as much design information saved as possible with ensured feedback. As well as in BIM design, the software packages must be improved by supplementing them with deficient tools or programme codes. After the research of BIM design software, it was determined that architectural, constructional and MEP programs work best interdependently and get analysed the most. These programs work best as they make the least number of mistakes when the model is created in one setting and has many tools. This type of design software data is kept internally, and they are converted into IFC or other information interchange format. Without changing the format, the data is not lost, and this is the reason behind fluent information interchange.

Deformation Replication

1970 ◽  
Vol 28 ◽  
pp. 280-281
Author(s):  
J. Temple Black
Keyword(s):  
Cutting Speed ◽  
Machining Process ◽  
Depth Of Cut ◽  
Rake Face ◽  
Orthogonal Machining ◽  
Aluminum Chips ◽  
Before And After ◽  
Materials Used ◽  
Glass Knife ◽  
Very High

Tool materials used in ultramicrotomy are glass, developed by Latta and Hartmann (1) and diamond, introduced by Fernandez-Moran (2). While diamonds produce more good sections per knife edge than glass, they are expensive; require careful mounting and handling; and are time consuming to clean before and after usage, purchase from vendors (3-6 months waiting time), and regrind. Glass offers an easily accessible, inexpensive material ($0.04 per knife) with very high compressive strength (3) that can be employed in microtomy of metals (4) as well as biological materials. When the orthogonal machining process is being studied, glass offers additional advantages. Sections of metal or plastic can be dried down on the rake face, coated with Au-Pd, and examined directly in the SEM with no additional handling (5). Figure 1 shows aluminum chips microtomed with a 75° glass knife at a cutting speed of 1 mm/sec with a depth of cut of 1000 Å lying on the rake face of the knife.

High Voltage Transmission Microscopy of Surveyor III Camera Shrouds

1971 ◽  
Vol 29 ◽  
pp. 138-139
Author(s):  
W. R. Duff ◽  
L. E. Thomas ◽  
R. M. Fisher ◽  
S. V. Radcliffe
Keyword(s):  
Alloy Sheet ◽  
Transmission Microscopy ◽  
Television Camera ◽  
Window Method ◽  
Transmission Electron ◽  
Microstructural Effects ◽  
Lunar Environment ◽  
Successful Retrieval ◽  
Materials Used ◽  
Abrasive Paper

Successful retrieval of the television camera and other components from the Surveyor III spacecraft by the Apollo 12 astronauts has provided a unique opportunity to study the effects of a known and relatively extensive exposure to the lunar environment. Microstructural effects including those produced by micro-meteorite impact, radiation damage (by both the solar wind and cosmic rays) and solar heating might be expected in the materials used to fabricate the spacecraft. Samples received were in the form of 1 cm2 of painted unpainted aluminum alloy sheet from the top of the camera visor (JPL Code 933) and the sides (935,936) and bottom (934) of the lower camera shroud. They were prepared for transmission electron microscopy by first hand-grinding with abrasive paper to a thickness of 0.006". The edges were lacquered and the sample electropolished in 10% perchloric methanol using the “window” method, to a thickness of ~0.001". Final thinning was accomplished by polishing 3 mm punched disks in an acetic-phosphoric-nitric acid solution.

Microstructural characterization of laser-melted/roller-quenched dicalcium silicate

1988 ◽  
Vol 46 ◽  
pp. 582-583
Author(s):  
C. J. Chan ◽  
K. R. Venkatachari ◽  
W. M. Kriven ◽  
J. F. Young
Keyword(s):  
Particle Size ◽  
Raw Materials ◽  
Shape Change ◽  
Microstructural Characterization ◽  
Particle Size Effect ◽  
Dicalcium Silicate ◽  
Laser Melting ◽  
Uniform Size ◽  
Cell Shape Change ◽  
Wide Range

Dicalcium silicate (Ca2SiO4) is a major component of Portland cement. It has also been investigated as a potential transformation toughener alternative to zirconia. It has five polymorphs: α, α'H, α'L, β and γ. Of interest is the β-to-γ transformation on cooling at about 490°C. This transformation, accompanied by a 12% volume increase and a 4.6° unit cell shape change, is analogous to the tetragonal-to-monoclinic transformation in zirconia. Due to the processing methods used, previous studies into the particle size effect were limited by a wide range of particle size distribution. In an attempt to obtain a more uniform size, a fast quench rate involving a laser-melting/roller-quenching technique was investigated.The laser-melting/roller-quenching experiment used precompacted bars of stoichiometric γ-Ca2SiO4 powder, which were synthesized from AR grade CaCO3 and SiO2xH2O. The raw materials were mixed by conventional ceramic processing techniques, and sintered at 1450°C. The dusted γ-Ca2SiO4 powder was uniaxially pressed into 0.4 cm x 0.4 cm x 4 cm bars under 34 MPa and cold isostatically pressed under 172 MPa. The γ-Ca2SiO4 bars were melted by a 10 KW-CO2 laser.

Structure-property relationships of PE/PP sandwiched films

1987 ◽  
Vol 45 ◽  
pp. 454-455
Author(s):  
J. Petermann ◽  
G. Broza ◽  
U. Rieck ◽  
A. Jaballah ◽  
A. Kawaguchi
Keyword(s):  
Mechanical Tests ◽  
Polymer Materials ◽  
Ionic Crystals ◽  
Structure Property ◽  
Polymer Systems ◽  
Structure Property Relationships ◽  
Oriented Films ◽  
Materials Used ◽  
Polymer Laminates ◽  
Heated Glass

Oriented overgrowth of polymer materials onto ionic crystals is well known and recently it was demonstrated that this epitaxial crystallisation can also occur in polymer/polymer systems, under certain conditions. The morphologies and the resulting physical properties of such systems will be presented, especially the influence of epitaxial interfaces on the adhesion of polymer laminates and the mechanical properties of epitaxially crystallized sandwiched layers.Materials used were polyethylene, PE, Lupolen 6021 DX (HDPE) and 1810 D (LDPE) from BASF AG; polypropylene, PP, (PPN) provided by Höchst AG and polybutene-1, PB-1, Vestolen BT from Chemische Werke Hüls. Thin oriented films were prepared according to the method of Petermann and Gohil, by winding up two different polymer films from two separately heated glass-plates simultaneously with the help of a motor driven cylinder. One double layer was used for TEM investigations, while about 1000 sandwiched layers were taken for mechanical tests.

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