scholarly journals Aplikasi Disain Komposit Pusat Pada Proses Pengecatan Mobil Bekas

2021 ◽  
Vol 8 (2) ◽  
pp. 143-156
Author(s):  
Abeth Novria Sonjaya ◽  
Kevin Hervito ◽  
Tri Atmoko
Keyword(s):  
Operating Conditions ◽  
Coefficient Of Determination ◽  
Small Scale ◽  
Selling Price ◽  
Repair Service ◽  
Spray Booth ◽  
Used Car ◽  
Used Cars ◽  
Paint Thickness ◽  
Spray Gun

The business of buying and selling used cars is increasingly substantial in Indonesia, in the era of globalization progressively developing depends on demands a process that must be fast, precise, and economical. Repair to body, chassis, and engine are competency expertise in the field of Automotive Engineering that emphasizes automotive repair service skills.  at now selling price of used cars, it is necessary to do repairs, the process of repairing used cars or better known as refurbishment work pre-owned cars is mostly done by small-scale used car buying and selling businesses. In order for used cars to return to their like-new condition, generally small-scale used car sellers carry out the process of repairing the vehicle themselves, especially repairs to the vehicle's body paint. This study aims to process of painting a Toyota Avanza car bodypaint against the thickness of the paint using a spray booth tool by using the model of central composite design (CCD). The effect of spray-on booth temperature, interstice size of the spray gun, and time according to the thickness of the paint will be analyzed using the CCD method. This spray booth painting technology is expected to help reduce bodypaint lead time. The results of the ANOVA (Analysis of Variance) regression analysis, the temperature of the spray booth, interstice size of the spray gun, and time are the factors that most significantly affect the thickness of the paint. The operating conditions to produce optimal paint thickness are temperature 55oC, interstice size of spray gun of 1.7 mm and time of painting and drying of 30 minutes, the resulted of a thickness of the paint for used and new cars are 130.2 μm and 81.84 μm., with a coefficient of determination for used and new cars of 90.78% and 96.19%.

scholarly journals Assessment of Stem Volume on Plots Using Terrestrial Laser Scanner: A Precision Forestry Application

Sensors ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 301
Author(s):  
Dimitrios Panagiotidis ◽  
Azadeh Abdollahnejad ◽  
Martin Slavík
Keyword(s):  
Norway Spruce ◽  
Laser Scanner ◽  
Estimation Methods ◽  
Coefficient Of Determination ◽  
Stem Volume ◽  
Small Scale ◽  
Terrestrial Laser Scanner ◽  
Precision Forestry ◽  
Total Tree ◽  
European Oak

Timber volume is an important asset, not only as an ecological component, but also as a key source of present and future revenues, which requires precise estimates. We used the Trimble TX8 survey-grade terrestrial laser scanner (TLS) to create a detailed 3D point cloud for extracting total tree height and diameter at breast height (1.3 m; DBH). We compared two different methods to accurately estimate total tree heights: the first method was based on a modified version of the local maxima algorithm for treetop detection, “HTTD”, and for the second method we used the centers of stem cross-sections at stump height (30 cm), “HTSP”. DBH was estimated by a computationally robust algebraic circle-fitting algorithm through hierarchical cluster analysis (HCA). This study aimed to assess the accuracy of these descriptors for evaluating total stem volume by comparing the results with the reference tree measurements. The difference between the estimated total stem volume from HTTD and measured stems was 2.732 m3 for European oak and 2.971 m3 for Norway spruce; differences between the estimated volume from HTSP and measured stems was 1.228 m3 and 2.006 m3 for European oak and Norway spruce, respectively. The coefficient of determination indicated a strong relationship between the measured and estimated total stem volumes from both height estimation methods with an R2 = 0.89 for HTTD and R2 = 0.87 for HTSP for European oak, and R2 = 0.98 for both HTTD and HTSP for Norway spruce. Our study has demonstrated the feasibility of finer-resolution remote sensing data for semi-automatic stem volumetric modeling of small-scale studies with high accuracy as a potential advancement in precision forestry.

Gas Cooling and Humidification: Design of Packed Towers from Small-Scale Tests

1950 ◽  
Vol 163 (1) ◽  
pp. 41-53 ◽  
Author(s):  
W. F. Carey ◽  
G. J. Williamson
Keyword(s):  
Operating Conditions ◽  
Total Heat ◽  
Small Scale ◽  
Water Cooling ◽  
Packed Tower ◽  
Simple Method ◽  
Worked Example ◽  
Gas Cooling ◽  
Heat Method ◽  
Working Out

On plants in which gases are processed, the gases are often brought into direct contact with water—usually in packed towers. The purpose may be to cool a hot gas, to increase the humidity of a gas, or, in the well-known special case of water-cooling towers, to cool water by contact with atmospheric air. These processes involve simultaneous transfers of sensible heat and water vapour, and existing methods of analysis are complex and laborious, except for the cooling of water, for which Merkel's total-heat method has long been available. Merkel's approximate solution offers the engineer a simple method of working out, for any operating conditions, the amount of heat transferred and the “driving force” available for transferring it. The present paper generalizes the total-heat method and, with a permissible sacrifice in accuracy, preserves the essential simplicity of the water-cooling treatment for gas-cooling and humidification processes. To complete the design of a packed tower, a knowledge is required of the characteristics of the packing. Information obtained in small towers is given for a number of packings, and a worked example shows how to apply the method of treatment, and the packing data presented, to the design of a large plant tower.

An Investigation of Coping Strategies Adopted by Small-Scale Sugarcane Growers in Bungoma County, Kenya

2021 ◽  
Vol 3 (1) ◽  
pp. 89-102
Author(s):  
Protas Fwamba Khaemba ◽  
Philomena Muiruri ◽  
Thomas Kibutu
Keyword(s):  
Coping Strategies ◽  
Survey Design ◽  
Primary Data ◽  
Coefficient Of Determination ◽  
Farm Income ◽  
Small Scale ◽  
Sugarcane Farming ◽  
Income Generating Activities ◽  
Household Heads ◽  
By Products

This paper reports on one of the findings of a study undertaken to investigate the coping strategies used by small-scale sugarcane growers in Bungoma County, Kenya. A descriptive survey design was used. A multi-stage sampling procedure was employed in the selection of the divisions, villages, key respondents, and sugarcane farmers to be interviewed. Primary data were collected using questionnaires from 100 small-scale sugarcane growers’ household heads from Bumula Sub-County. Data were collected during the month of December 2016.  Qualitative data collected were analysed thematically. Quantitative data was analysed using regression in SPSS version 23 and Microsoft Excel. Results from small-scale sugarcane farmers in Bumula Sub-County revealed a declining farmers’ participation in sugarcane farming activities in the area. Coping strategies identified included off-farm income-generating activities, sale of sugarcane by-products and non-contracted cane farming. Significance test qualification was based on a percentage of adjusted R2 and within 0.3 to 0.7 ranges for Beta weight value.  The correlation coefficient (R-value) for the model was 0.362, indicating a moderately positive relationship between variables. The coefficient of determination (R2) was found to be 0.284 (28.4%). Adopted coping strategies accounted for 28.4% variability in the declining farmers’ participation in sugarcane farming. This result suggests the existence of other factors that explain the remaining 71.6% of the variation in the declining farmers’ participation. Farmers should enhance both on-farm and off-farm income-generating activities, sugarcane by-products value addition, and non-contracted cane farming in order to reverse the outcome and result in an enhanced farmers’ participation in sugarcane farming activities by 36.2%

scholarly journals Thin Gas Film Isothermal Condensation in Aerodynamic Bearings

2019 ◽  
Vol 141 (11) ◽  
Author(s):  
Eliott Guenat ◽  
Jürg Schiffmann
Keyword(s):  
High Speed ◽  
Waste Heat ◽  
Load Capacity ◽  
Saturation Pressure ◽  
Operating Conditions ◽  
Fluid Film ◽  
Small Scale ◽  
Vapor Compression ◽  
Density Profiles ◽  
Film Pressure

Abstract High-speed small-scale turbomachinery for waste heat recovery and vapor compression cycles is typically supported on gas-lubricated bearings operating close to the saturation conditions of the lubricant. Under particular conditions, the gas film might locally reach the saturation pressure with potentially hazardous effects on the performance of the gas bearing. The present work introduces a model based on the Reynolds equation and the development of cavitation modeling in liquid-lubricated bearings for condensing gas bearings. The effect of condensation on load capacity and pressure and density profiles is investigated for two one-dimensional bearing geometries (parabolic and Rayleigh step) and varying operating conditions. The results suggest that the load capacity is generally negatively affected if condensation occurs. An experimental setup consisting of a Rayleigh-step gas journal bearing with pressure taps to measure the local fluid film pressure is presented and operated in R245fa in near-saturated conditions. The comparison between the evolution of the fluid film pressure under perfect gas and near saturation conditions clearly suggests the occurrence of condensation in the fluid film. These results are corroborated by the very good agreement with the model prediction.

scholarly journals Community Empowerment to Increase Litopenaeus vannamei Productivity Towards Semi-Intensive System by Potential Analysis and Self-Feed Production

2018 ◽  
Vol 4 (2) ◽  
pp. 156
Author(s):  
Sulastri Arsad ◽  
Muhammad Musa ◽  
Evellin Dewi Lusiana ◽  
Mohammad Mahmudi ◽  
Nanik Retno Buwono ◽  
...  
Keyword(s):  
Swot Analysis ◽  
Stocking Density ◽  
Community Empowerment ◽  
External Factors ◽  
Shrimp Farming ◽  
Small Scale ◽  
Selling Price ◽  
Feed Production ◽  
Internal And External Factors ◽  
Intensive System

Vaname shrimp is one of the leading cultivations of fishery production commodities in Indonesia which has high selling price and market share, also relatively resistant with high stocking density. Cultivation activities of this commodity can be carried out through three systems; namely traditional, semi-intensive, and intensive system. One group of cultivators who develop shrimp farming business is Mina Nusantara group in Lamongan District, where the cultivation system is still performed traditionally. The shrimp size was not uniform, and the survival rate was low once it harvested. Moreover, community empowerment was applied to increase vaname productivity towards semi-intensive system by culture potential analyses using SWOT and self-feed production training. Survey and experimental approach were used during the activities. The activities included survey and discussion with shrimp local farmer (Mina Nusantara), identified internal and external factors of culture by using SWOT analysis, carried out self-made artificial feed training, and program evaluation at the end. The activity resulted an increasing of farmer understanding of various culture system and they can produce the pellet in small scale by themselves. Based on SWOT analysis, the culture is potential to develop sustainably by regarding both internal and external factors.

scholarly journals SUSTAINABILITY OF FISHERY POND POLYCULTURE WITH AND WITHOUT MANGROVE INTEGRATION

2017 ◽  
Vol 8 (2) ◽  
pp. 655-669
Author(s):  
Eva Dolorosa ◽  
. Masyhuri ◽  
. Lestari ◽  
. Jamhari
Keyword(s):  
Waste Treatment ◽  
Small Scale ◽  
Selling Price ◽  
Treatment Technology ◽  
Technology Infrastructure ◽  
Sustainability Index ◽  
Tiger Shrimp ◽  
Market Location ◽  
Organic Pesticides

This research aims to analyze the sustainability of two types of fishery pond polyculture of milkfish-tiger shrimp with and without mangrove integration on small-scale farms. Sustainability dimensions considered in this research included are the ecology, economy, social-culture, technology-infrastructure, and laws-institutions as the dimensions analyzed.  The performance of each aspect was analyzed by using Multi-dimensional scaling (Rapfish) and leverage analysis. The result shows that the current multidimensional sustainability status  of  the fishery  pond   polyculture  both  with  and  without  mangrove  integration was less sustainable  (sustainability index of 44.98 and 36.18 respectively). The result of leverage analysis indicates that out of 73 attributes, there were 16 and 23 sensitive attributes respectively that affect the sustainability of polyculture fishpond with and without mangrove integration. These attributes should be managed immediately in order to improve the sustainability index of fishery pond polyculture, this includes organic pesticides application, source of capital, the availability of seeds of milkfish and tiger shrimp, market location, selling price, waste treatment technology, availability of agribusiness facilities and infrastructure, aquaculture technology, information technology, standardizing the quality of fishery products, availability of micro finance institution and others.

scholarly journals Examination of physical properties of final product and drying properties of combined (convective pre-drying and freeze finish-drying) dehydration method

2014 ◽  
pp. 5-12
Author(s):  
Tamás Antal
Keyword(s):  
Freeze Drying ◽  
Operating Conditions ◽  
Small Scale ◽  
Case Hardening ◽  
Degree Polynomial ◽  
Hot Air Drying ◽  
Drying Time ◽  
Drying Characteristics ◽  
Hot Air ◽  
Drying Properties

In this study, the effects of freeze drying (FD), hot-air drying (HAD) and combined drying (HAD-FD) on drying characteristics, energy uptake, texture, rehydration and color of carrot were investigated. Results showed that HAD-FD significantly improved the drying time compared with FD under the same operating conditions, and the HAD-FD can reduce the total cost of dehydration. The drying kinetics was described by the Henderson-Pabis and the third degree polynomial models in the case of HAD, FD and HAD-FD. The HAD carrot samples were exhibited shrinkage, case hardening, poor rehydration and brown surface. The FD carrot cubes appeared porous structure, excellent rehydration, soft texture and loose color. The HAD-FD samples were superior to HAD products and was nearer in quality to FD products with respect to appearance, rehydration and surface resistance (texture). Finally, it is concluded that HAD-FD is effective in improving the FD drying rate. However, the combined drying has a small-scale adverse effect on product quality.

scholarly journals A Novel Hybrid Technique of Frequency Control for Distributed Energy Resources

2021 ◽  
Vol 40 (1) ◽  
pp. 180-204
Author(s):  
Hasham Khan
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Energy Demand ◽  
Frequency Control ◽  
Industrial Sector ◽  
Operating Conditions ◽  
Small Scale ◽  
Hybrid Technique ◽  
Operating Characteristics ◽  
Power Distribution System

The rapid increase in the population and fastest development in the industrial sector has increased the energy demand throughout the world. Frequent outages and load shedding has seriously deteriorated the efficiency of the electrical power distribution system. Under such circumstances, the implementation of Distributed Generation (DG) is increasing. Small hydel generators are considered as the most-clean and economical for generating electrical energy. These are very complex nonlinear generators which usually exhibits low frequency electromechanical oscillations due to insufficient damping caused by severe operating conditions. These DGs are not connected to the utility in many cases because, under varying load, they cannot maintain the frequency to the permissible value. This work presents detailed analysis of operating characteristics and proposes a hybrid frequency control strategy of the small hydel systems. The simulation and testing is performed in MATLAB, the results verified the improved performance with the recommended method. The proposed method conserves half of the power consumption. The control scheme regulates the dump load by connecting and disconnecting it affectively. The application of presented methodology is convenient in the deregulated environment, especially under the severe shortage of energy. The proposed model keeps the frequency of system at desired level. It reduces the noise, thereby improving the response time of the designed controller as compared to conventional controllers. The innovative scheme also provides power for small scale industrial, agricultural and other domestic application of far-off areas where the supply of utility main grid is difficult to provide. The recommended scheme is environmental friendly and easy to implement wherever small hydel resources are available.

scholarly journals Kelayakan Usaha Ayam Broiler (Studi pada Usaha Peternakan di Desa Cibinong)

2018 ◽  
Vol 33 (2) ◽  
pp. 96
Author(s):  
Elpawati Elpawati ◽  
Achmad Tjachja Nugraha ◽  
Ratu Shofiatina
Keyword(s):  
Small Scale ◽  
Selling Price ◽  
Poultry Production ◽  
Poultry Farm ◽  
Financial Feasibility ◽  
Positive Growth ◽  
Poultry Farms ◽  
Positive Growth Rate ◽  
Small Scale Farmers ◽  
The Many

<p>Indonesia poultry consumption has increased year by year, with the average positive growth rate of 4.6%. This situation can be a chance for both small and large scales of poultry farmers, considering that poultry consumption is increasing every year. The rate of poultry production in Gunung Sindur was correlated with the amount of the existing poultry farms. Romli Farm was a small scale poultry farm in Gunung Sindur, Bogor. This poultry farm, with no partnership, could independently survive amongst the many other existing farms. However, although the opportunities were wide open, this business was not always viable for the farmers because many of small-scale farmers could not be able either to increase the income or to carry on the business. This research aimed to study the income, financial feasibility (NPV, IRR, Net B/C Ratio, and PP), the BEP of Selling Price, and the BEP of Product in Romli Farm.</p>

scholarly journals INCOME TAX FROM EXCESS OF VAT ON THE SALE OF USED MOTOR VEHICLES

2021 ◽  
Vol 2 (2) ◽  
pp. 87-102
Author(s):  
Waidatin Nur Azizah
Keyword(s):  
Income Tax ◽  
Research Method ◽  
Value Added ◽  
Secondary Data ◽  
Motor Vehicles ◽  
Primary Data ◽  
Selling Price ◽  
Directorate General ◽  
Used Car ◽  
Depth Interviews

Sales of used motor vehicles in Indonesia are subject to Value Added Tax (VAT) of 10% of the selling price and are charged to consumers. Value-Added Taxes collected when delivering to consumers are called output taxes. According to PMK Number 79 of 2010, Taxable Entrepreneurs (PKP) who sell retail used motor vehicles credit and input tax of 90% of the output tax. Therefore, PKP remits the payable VAT to the state treasury at 1% of the selling price. As a result, there is a more difference of 9% of the selling price paid by consumers and not deposited in the national treasury. According to research, this 9% excess is income for entrepreneurs and may be subject to income tax. However, no regulations are governing further regarding the taxation of this excess. The purpose of this study is to determine the potential income tax on the excess of VAT on the sale of motorcycles and used car retail. The research method used is descriptive qualitative using primary data and secondary data. Primary data is obtained directly from data sources, namely in-depth interviews with practitioners and academics in taxation at the Fiscal Policy Agency and the Directorate General of Taxation. The results of this study are that there is considerable potential regarding aspects of income tax on the excess of VAT on retail sales of used motorcycles and cars

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