This study aims to determine the effect of variations in preheating and cooling media on the tensile strength of SMAW welding results. Tests to determine the tensile strength of SMAW weld results with variations in preheating and cooling media.
Total Elongation Results
An increase in strain value is affected by the high preheating temperature where the higher the preheating temperature the material will be more ductile due to slow cooling and allow more ferrite transformations while other factors influencing are the density or density of the cooling medium where the density is smaller, the cooling rate will be lower [20].
Plastic Elongation Results
The value of the coefficient of determination (R2) in the study was 70.36% where the two independent variables had a significant effect on the response, while 29.64% was affected by errors and other factors that influenced the research. The increase in the value of plastic elongation is affected by the nature of the material being more ductile due to the slow cooling rate and it is possible to convert more ferrite so that the material is more ductile, so the value of plastic elongation will be more high.
CONCLUSION
Journal of Engineering Design and Technology Evolution of the Microstructure, Mechanical Properties, and High-Order Modal Characteristics of AISI 1045 Steel Subjected to a Simulative Surface Brushing Environment. Effect of combined laser heat treatment and ultrasonic impact treatment on the microstructure and corrosion behavior of AISI 1045 steel.
DESIGN AND BUILD AN INTERNET OF THINGS (IOT) AUTOMATIC TV BROADCASTING ANTENNA SYSTEM
- INTRODUCTION
- METHODS
- Research Framework
- Hardware Design
- Software Design
- Design Results
- Hardware Build Results
- Tool Testing Results
- INDOSIAR 90 °
- TRANSTV 90 °
- Overall Result Analysis
- REFERENCES
It can be controlled via Android with the Blynk IoT app, and the selected broadcast will be visible on the LCD screen of the antenna system. The 3rd picture is on the ANTV channel with an angle of 15° at site 1 and 103° at site 2, which gives a good picture and sound.
LOGIC
TO IMPROVE HONEY PROCESSING PRODUCTIVITY
RESULTS AND DISCUSSION
Preliminary experiments were performed using the company's temperature and relative humidity combination of 30 °C and 60%. Relative humidity (RH) fluctuations during the experiment for each treatment Temperature RH(%) Replication fluctuations in actual RH conditions after the experiment. According to Gabriel [23], the higher the temperature in the room, the higher the relative air humidity, the lower the temperature, the lower the air humidity.
The interaction of temperature and relative humidity factors is not significant effect on the rate of reduction of levels of honey water. 16] and Singh [17], these two studies did not investigate the effect of interaction of temperature and relative humidity factor.
DESIGN & BUILD BANKNOTE NOMINAL IDENTIFICATION TOOLS FOR VISUAL IMPAIRMENT USING CONVOLUTIONAL
ANDROID BASED
RESULTS AND DISCUSSION 1 Design Results
- Calculation of Cnn Algorithm Using Confusion Matrix
- Software Build Results
The money face value detection tool can be used by placing money in the place provided by the tool and can be used to track the amount of money used as an expenditure or entered and stored in a database. TN is a True Negative, a negative data correctly predicted by the system (in this case no testing was done). FN is False Negative, the amount of negative data that the system assumes to be false (in this case no testing was performed).
Accuracy is used to measure the accuracy between the information requested by the user and the answers provided by the system. In addition, the Android application as a support in monitoring money can also work properly, as evidenced by the amount of money remaining when performing voice buy and sell transactions from the application when it is run.
GREENSHIP ASSESSMENT OF INDOOR HEALTH AND COMFORT AT GREENHUB SUITED OFFICES
RESULTS AND DISCUSSION 1 Indoor Health and Comfort
- Indoor Health and Comfort at Greenhub Suited Offices
Based on the observations, the results showed that it was very rare to find dust on the furniture and items in the room (Item:1). The measurement result showed that 100% of the biological quality reached the standard that was less than 700 CFU in accordance with Permenkes RI Number 1077/Menkes/Per/V/2011. This assessment was carried out by measuring each point measured using lux meters in accordance with the SNI of Energy Storage in the Lightning System.
Based on the measurement, the results showed that the noise level at Greenhub Suited Offices was 100% in accordance with the design criteria recommended by SNI Point: 1). Based on the observation, Greenhub Suited Offices met all criteria for indoor plants.
FILTRATION DESIGN MODELING STUDY WITH VARIATION IN NUMBER OF FILTERS, PALM OIL
MILL EFFLUENT MESHING
Hajar Isworo 1) , Muhammad Khalil 2) , Ika Kusuma Nugraheni 3) , Kurnia Dwi Artika 4)
Citation and References 1. Definition of Filtration
Some of the liquid remains on the supply side of the filter or remains on the filter media and some small solids pass through the filter. Increasing the amount of filtration can increase the pressure value, this can be seen in the formation of ABCA, CBAB, ABCAB, CBACB. While reducing the number of filters will reduce the pressure value, this can be seen in the ABC and CBA formations.
The results showed that cellulose membranes are effective in the filtration process of textile waste management. While reducing the number of filters will reduce the pressure value, this can be seen in the ABC and CBA formations.
ACKNOLEDGEMENT
When we place a large mesh hole at the first level, the speed and velocity is less, this can be seen in the CBA, CBAC and CBACB formations. The meshing formation with a small size in the first position can increase the speed and pressure, we can see that in the ABC, ABCA and ABCAB formations. Silamba, "PENGARUH PENGGUNAAN BEBERAPA JENIS MEDIA FILTRASI TERHADAP KUALITAS LIMBAH CAIR EKSTRAKSI SAGU (metroxylon sp.)," Agrointek J.
Zulfi, Fifia; Dahlan, K; Sugita, “SIFAT ALIRAN MEMBRAN PADA PROSES PENYARINGAN LIMBAH CAIR INDUSTRI LAPISAN LOGAM,” J.
CORROSION RATE AND RESIDUAL STRESS ON GMAW WELD JOINT OF SUS 304 STEEL WITH STATIC
THERMAL TENSIONING TREATMENT
Specimen and Equipment Preparation
- Welding Method
- Corrosion rate test
- Slitting Test
The welding process uses a travel motor as a welding assistant, so the welding speed can be continuously set at 8.3 mm/sec. The workpiece that is prepared for testing is cut into smaller sizes for both corrosion rate testing and residual stress testing. The size of the sample used for corrosion rate testing measures 10x10 cm in the area that is not shaded (b) and for cutting it is 20x20 cm (c) which can be seen in Fig 3.
To determine the corrosion rate in the SUS 304 test specimen, three electrodes are arranged by pairing each electrode. In the shear test, the strain gauge sensor is attached to the back of the sample as shown in Fig.
RESULTS AND DISCUSSION 1 Distribution of Temperature
- Corrosion Rate
In FIG. 7 shows that when the heating temperature in the static thermal stress treatment is high, the temperature at the base metal is also high (T1, T3, T5). It has been shown that the corrosion rate increases with increasing heating temperature in the static thermal stress treatment. The value of the corrosion rate (b) is closely related to the corrosion current (a) occurring in the polarization of the potentiostat.
Residual stress of static thermal stress treatment with temperature variation treatment Young Modulus (MPa or . N/mm2). When the heater temperature in the static thermal stress treatment is higher, the load value in the cutting path is also high.
ANALYSIS OF FINANCIAL FEASIBILITY OF TOURISM TRANSPORT AND SHUTTLE TRANSPORT BUSINESS
CASE STUDY: PT. PENJOR BALI TRANSPORT)
RESULTS AND DISCUSSION Vehicle Operating Expenses
The results of the calculation of the vehicle's operating costs per kilometers, large buses are Rp. The results of the sensitivity of tourism transport, where costs increase by 101% and interest investments are not feasible. The results of the sensitivity of the shuttle transport, where costs increase by 3% and interest investments, are no longer feasible.
Shuttle Transportation, the amount of income during the technical life of the vehicle is 10 years in PT. The results of the sensitivity analysis, carried out with trial calculations, are looking for what is the maximum percentage of sensitivity to the conditions of expenditure and cost of income, where the investment is not worthwhile.
ANALYSIS OF MODIFICATION OF CAR AC COMPRESSOR TO SPLIT AC COMPRESSOR ON
COOLING RATE
RESULTS AND DISCUSSION 1 Figure and Table
- Compressor Modification
- System Work
Temperature evaporator 1, left AC network 1, middle AC network1 and right AC network shows the cooling rate using a car AC compressor data collection is according to figure 3. Meanwhile, in temp evaporator 2, left AC network 2 , middle AC network 2 and right AC network 2 shows the cooling rate with a modified/separated AC compressor in the vehicle system. The result of this research is that the split jet compressor can be used to replace the car jet compressor without significant changes.
The disadvantage in this study is that the cooling rate is different, the split AC compressor takes longer, this difference is that the refrigerant and the system of the split AC compressor are not exactly the same as the normal AC compressor system in the car. In this research, it is necessary to further improve the compressor replacement system for separate AC, such as refrigerant replacement, capillary tube expansion valve and filter.
ACKNOWLEDGEMENT
The cooling system in the car has been redesigned based on the standard refrigeration duty cycle, with only changes to the compressor using a ½ PK split AC compressor, no changes to the condenser, evaporator, filter, expansion valve and piping in this design. From the modification of the car AC compressor to the split AC compressor, a different cooling is achieved, the cooling rate is faster than the normal car AC compressor, because without changing other components such as freon, expansion valve and filters, but also without essential changes. changes can still produce a sufficient degree of cooling. Analysis of the operation of the ET 450 type car air conditioner with the variation of the compressor working pressure.
Analysis of the performance characteristics of the cooling system (air conditioning) using freon R-22 based on the speed variations of the condenser cooling fan, KAPAL magazine, Vol. The Effect of the Number of Capillary Tube Coils on the Coefficient of Performance (Cop) of Automotive Air Conditioning Refrigeration Systems, Department of Mechanical Engineering, Faculty of Engineering, Muhammadiyah University, North Sumatra.
THERMAL COMFORT STUDY OF OUTDOOR SPACE FOR FACE-TO-FACE LEARNING SYSTEM
Study of Outdoor Thermal Comfort for Face-to-face Learning Systems
- Dry Themperature
- Humidity
- Air Movement
- Effective Temperature
There are four factors that influence thermal comfort: air temperature; humidity; Air movement and radiation. The effective temperature can be determined by coupling the dry temperature and humidity in a psychometric calculator to get the wet temperature, which is then linked to the air movement on a nomogram chart [13][11]. There are four data studies related to thermal comfort, namely: dry temperature, humidity, air movement and effective temperature.
While the pattern of changes in air motion tends to be unaffected by time, with a fluctuating pattern. Effective temperature is obtained from the combination of measurements of dry temperature, humidity and air movement processed in psychometric calculators and nanograms, the calculation results can be seen in Table 3.
