Standalone photovoltaic system is a system that does not connect with main grid. So, it is necessary to have a backup supply, considering day and night cycle, where there are no solar radiation at night. Backup supply is often be the grid in the on-grid system, but in an off-grid system, backup supply...

COVID-19 is caused by Coronavirus which has been previously linked with 2012 SARS disease. This is an RNA virus. Highly contagious is nature; spreads by air droplet and contact. It needs both air and contact precautions. Interventions to prevent its spread have been tried which includes social distancing,...

This study aims to reduce NOx emission by optimizing the secondary air system of the boiler using computational modeling and simulation. The shredded EFB is introduced in the inclined bed with primary air supply from the bottom of the bed. FLUENT Ver. 15.0 computational software is used to simulate the...

This paper presents a research work on the simulation of a simultaneous gas absorption-desorption in the packed columns using computer software to obtain the maximum amount of absorbed carbon dioxide (CO2) into the water, the optimum L/G ratio for absorption, the optimum airflow rate for desorption,...

Plastic waste is the biggest problem faced by almost all countries. The long process of degradation and the large production of conventional plastics are the main causes of the accumulation of plastic waste, especially in Indonesia. The use of rubber cassava and old newsprint along with fillers in the...

Energy consumption in Indonesia increases annually but fossil fuel reserves are limited. Biodiesel is an environmentally friendly fuel that has physical and chemical properties similar to that of diesel. Biodiesel can be made from animal oil, one of which is oil derived from the waste of patin fish....

This paper contains an explanation of the fertigation management system model to deal with the water crisis and the efficient use of plant nutrients in the case of agricultural industrial land in Lembang, Indonesia. The method developed uses a time-duration method equipped with supervised machine learning....

Since Feeding management and water Quality Monitoring become important things to control in aiming maximizing the cultivation of shrimp. The development of the Mobile Aplication is used to support the automatic Shrimp Feeder help the farmer to control and monitor the shrimp Ponds from a distance. This...

The use of split air conditioning (Split A/C) on residential applications, hotels and office buildings is currently the best solution to get more comfort when staying in a tropical country. The problem is Air Conditioner in a home or office building consumes 50% to 65% of the total electrical energy...

This study aims to examine the experience of agritourism attractions and assess what dimensions are relevant to represent these variables. Literature studies show that limited attention to tourism experiences in the context of agritourism is not discussed in detail about the factors that can cause it....

Steel material has resistance to rust and strong magnetic properties, as well as resistance to loads. Aluminum is of high strength and corrosion resistance. Most of the technical equipment is under rotary dynamic load pressure. The component that receives the most dynamic load is the shaft. The shaft...

The Activated charcoal - AC is a carbonaceous material with high carbon content in its structure, it can be obtained from biomaterials such as: coconut shell, wood, bamboo, etc. Its pores are highly developed, have high adsorption capacity and have a microcrystalline form capable of selectively purifying...

In this paper, we evaluate the advantages and challenges of E-learning in Politeknik Negeri Semarang. The advantages of E-learning are: the students think that E-learning is very convenient because they can reduce print work, get the material efficiently, get a real-time score after examination, have...

Carbon Nanodots (CNDs) are semiconductor materials with a size below 10 nm. Carbon nanodots can be applied to several areas, such as biosensors, bioimaging, optoelectronics, and photocatalysis. Current research has shown that additional dopants to CNDs such as nitrogen (N) and sulfur (S), indicate a...

Biogas is an alternative energy that can be obtained from the anaerobic degradation process of organic matter. The high carbon dioxide (CO2) content in biogas needs to be reduced, even if it can be removed so that the quality and heat value of biogas increases. The water scrubbing method is a method...

Final Disposal Site (FDS) is a place where waste reaches the final stage in its management. In realizing the need for waste disposal facilities and infrastructure, precise calculations are needed so that the land provided for the FDS can accommodate all the waste. The landfill design method with Sanitary...

The activated carbon (AC) electrodes were prepared by a two-step microwave-induced CO2 activation of OPS using bed temperature as control parameter. The electrochemical properties of the AC electrodes were investigated at room temperature by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD)...

RCAS (Rear-end Collision Avoidance Systems) is one of the safety features in autonomous cars that can determine what kind of movement that a car installed with the RCAS system should perform to avoid any crashes with another car/object in front of it. This camera-based RCAS uses a Pixy CMUCAM5 camera...

In this paper, an electronic load controller (ELC) that has a function to maintain a constant output voltage of an axial flux permanent magnet (AFPM) is proposed. It consists of three main components namely voltage sensor, microcontroller and switching driver are proposed. When the main load of the AFPM...

This paper examines the implementation of Customer Relationship Management (CRM) and the role of social media in small and medium enterprises (SMEs). Understanding these phenomena is very critical since SMEs have used social media to interact with their customers, however little researches has been conducted...

Understanding concepts related to the process for determining the design of protection settings requires practical experience, which can be achieved by repeated trials. The objective of this research has described the design and implementation of a hardware simulator for understanding concepts phase...

Pectin, a biopolymer which is a natural additive, is widely used in various countries. In the food industries, it is used as a basis for functional food, including fat replacer. In Indonesia, however, pectin is still imported. Previous studies reported that pectin can be obtained through the extraction...

Over the years, microwave power has been used as a control parameter for the preparation of activated carbon (AC) via microwave heating due to the volatile nature of temperature inside the microwave. This paper investigates the use of bed temperature as a control parameter for the preparation of activated...

The influences of culture at different levels such as national culture, organizational culture and professional culture have become one of the most research topics in construction management. Understanding cultural issues at the project level and their impact on the performance of the construction project...

Ciaruteun Ilir Village, Cibungbulang sub-district is located on the West of Bogor Regency, approximately 6 km from the sub-district capital. The village is experiencing difficulties in obtaining clean water that is suitable for consumption even though the village area has a river but is full of dirt...

The increasing volume of vehicles that passing on Mahar Martanegara Street has caused traffic jams at the Leuwigajah Bridge, Cimahi. Because it is not balanced with adequate road conditions and bridge characteristics (bottleneck). The solution from the West Java Provincial Government to overcome this...

Along with the development of electronics technology, electrical loads are also developing. Originally, electrical loads are linear. However, as a result of the development of electronics technology, a non-linear electrical loads appear. Non-linear loads installed in a single phase power system such...

Liquid level control is a system that is often found in the process industry, such as the chemical and petroleum industries. The control method that is usually used to control liquid level is conventional control such as Proportional Integral Derivative (PID) controller. However, conventional control...

This study evaluates the performance of a residential air conditioner (A/C) using R32 as a retrofit for R410A. One of the biggest challenges in the retrofitting is to determine the ideal mass of refrigerant, which eventually lead to optimum performance of the system. The theoretical mass of refrigerant...

The rapid development of technology has an impact on the increasing human need for energy, especially electricity. At present, population growth and climate change are encouraging new interest and investment in renewable energy sources to provide access to reliable and sustainable energy. One of the...

The aim of this study is to highlight the importance of analyzing the reliability and data analysis in the industry. This analysis makes it possible to determine the pattern of damage that has occurred in order to determine the right treatment strategy. This study was conducted in a state-owned company...

Biomechanics studies in dance can be used as a means to control health, fitness and training. The dance is always performed in the accompaniment of music. Then the combined benefits of the elements of motion and music sound are thought to produce a strengthening effect on the dancer’s physiological condition,...

Bridges are a vital part of a road network that supports regional development. Bridges must be inspected regularly to convince the safety and comfort of bridge users during their service life. This paper will discuss the comparison study of condition rate and remaining life of the bridge that has been...

A physical pendulum experiment now becomes essential in Physics Education. A physical pendulum consists of a rigid object, with a particular shape and size, swung by a pivot point on the object. One of the often-overlooked requirements in measuring practice by this experiment is the small angular displacement....

Asphalt modification with nanotechnology materials can be in the form of nanoclay, carbon nanotubes and nanosilica. Recent research found that nanosilica has been proven to improve rutting performance and fatigue resistance in asphalt mixtures. Nanosilica that will be used in this research is nanosilica...

Three-phase induction motors are the most widely used motors and they absorb the largest electrical power among electrical loads. To know the conditions and performances of the motor, it requires the values of its equivalent circuit parameters. At this time, there have been found many methods to determine...

Computational Thinking (CT) is a problem-solving approach that consists of four fundamental thinking processes: decomposition, pattern recognition, abstraction, and algorithm. As an improvement to the author’s previous study, this paper emphasizes the effects of CT on user interface (UI) design as part...

Solar energy is one alternative of renewable sources of energy that can be used as a substitute for fossil fuel, which will be eventually depleted. Since Indonesia is located at the equator with abundant supply of sunlight all through the year, the use of solar energy as an alternative source of energy...

This research makes a smart kWh (kilowatt-hour) electricity meter system to complement the conventional kWh model household electricity meter. The purpose of this study is to monitor and control the use of electrical energy at low voltage and industrial groups to obtain efficient patterns in the use...

Glulam-concrete composite beams can be a solution for bridge construction with the principle of flexible beams, where the stress must be designed with the upper fibers to withstand the pressure and the lower fibers to withstand the tension. In this case the compressed area is held by the concrete slab,...

Based on the GHG and MVP Report in 2018, the transportation sector has become the second largest contributor of GHG emissions in Indonesia. Efforts to reduce emissions have been made, but still focus on improving the transportation mode which are still less optimal. Some researchers have proposed ideas...

A study to improve the utilization of waste material as concrete construction material and the durability of concrete was carried out using a Ground Granulated Blast Furnace Slag (GGBFS) material which is the residual material produced by a blast furnace process. This experimental study using 6 normal...

The number of confirmed COVID -19 cases in Indonesia is increasing rapidly. Therefore forecasting of the number of confirmed cases in the future needs to be predicted, so that the government can prepare to handle this pandemic case. The purpose of this study is to provide information on the estimated...

The impact of high rainfall and uncontrolled traffic loads, it is necessary to conduct research on the use of concrete waste materials as a substitute for coarse aggregates in order to reduce the limitations of natural aggregates and wetfix-be additives with the aim of increasing performance, strength,...

The implication of Bandung as a tourism destination is the increase in traffic flow during weekends and vacation times due to the increasing number of private vehicles of domestic and foreign tourists entering Bandung. Therefore, an action is needed in the form of providing mass transportation modes...

Advancement of technologies in the world of construction time is very fast, the use of concrete was applied not only on land but also in the area of extremes environmental such as regional seawater. One of the ways repair structures that were popular when this is by using a material CFRP (Carbon Fiber...

The performance of the android application is one factor that needs to be considered because an android device has limited power, memory and resources. This is a challenge for developers to improve performance so that applications can run optimally. There are several architectures that are commonly used,...

Based on current conditions, Access to the Bailey Mountain Bentang Bridge has problems related to the road network, including steep slopes and sharp bends. Therefore, the geometric design of the access road to the Bailey Mountain Bentang Bridge Bridge is considered necessary as a solution to the problems...

The bridge collapse is often the result of scouring. The potential for flooding can increase riverbed degradation and local scouring, which adds to the bridge threat sub-structures. Batujajar Bridge, located in Batujajar District, West Bandung Regency, has two pillars within the Citarum river. The 150...

Data security is one of the factors which evaluating airport service quality, starting with passenger verification and baggage management. QR Code technology security that is widely applied at this time is still considered lacking because of its characteristic that must be seen by the reader so that...

Java Island is an area with hydrological disasters, especially landslides, which are classified as frequent. The landslide occurred because Java, especially West Java, has an extensive watery area of the entire region and has a high rainfall intensity. Geographical conditions that are dominated by basins...

The most likely happen problem on embankment construction is settlement and land deformation even sliding because of loads. Those failures can be caused by embankment fail or subsoil fail and the triggers are overloading loads, low bearing capacity also high compressibility of the soil. To avoid high...

The Cileunyi-Sumedang-Dawuan Toll Road (Cisumdawu) is located in West Java, that connecting Bandung, Sumedang, and Majalengka. There are many bridges in the Cisumdawu Toll Road construction project, including the Cipeles Bridge, which is crossed by the river below. The river under the Cipeles Bridge...

A marketplace in this research is an online application for buying and selling products like e-commerce, where Seller is able to have more than one store. A seller in a marketplace application may create a store with a variant description based on the products for sale. HBase is One of NoSQL schemaless...

Toll roads are currently one of the supporting factors for economic growth. So that if the function is slightly disturbed, obstacles will arise, which will hamper vehicle’s journey using the toll road. Many factors hinder this toll road. One of the traffic obstacles is a flood disaster. Floods are also...

Energy from biomass sources has earned significant interest in recent times. In the present research, an attempt has been made to develop a pelletizing process to improve the properties of biomass pellets, as many of the important properties of the pellets are dependent upon the raw and additives materials....

Detecting face image with various poses and expressions is a challenging problem especially if the face database consists of only neutral faces. To solve that problem, the pose and expression of face image should be neutralized first. This study proposes a method to recognize the face image by making...

Planning of water structures such as dams, irrigation canals, and other water structures require a description of a hydraulic flow phenomenon that these buildings. Each flow conditions before, moderate, and after passing through each building has its characteristics or tendencies. This study aims to...

The development of technology is overgrowing. This will affect human life, especially in the online entrusted service business. An entrusted service is an activity carried out by someone who is travelling to a place and then opens an entrusted service for purchasing goods or sending goods. Currently,...

Laundry wastewater is classified as domestic wastewater that has a turbidity of 25 – 150 NTU and can cause an environmental problem. Moringa seeds are plants that can be used as natural coagulants for the treatment of wastewater containing suspended colloids. The main purposes of this study are to extract...

3D point cloud techniques have been playing critical roles in industrial automation. Applications focused on automated assembly are thus becoming important in manufacturing industry to solve some particular problems. To implement automated assembly, Reinforcement Learning is employed in for planning...

The power factor value in RLC circuits is determined by the amount of pure resistance (R), self-inductance of the coil (L) and the capacitance of the capacitor (C). In this study, the measurement of the power factor value in series and parallel RLC circuits is conducted through experimental and simulation...

World energy demand continues to increase rapidly. Meanwhile the non-renewable sources of energy keep decreasing. To overcome this situation, many studies to produce energy from renewable source has been developed and tested. From many available options, biodiesel is one of renewable energy that has...

Liquefaction is a phenomenon that occurred when soil loses its shear strength due to an earthquake. In general, liquefaction happens during a large magnitude earthquake on soil with loose to very loose sand consistency and high ground water level. Palangpang Bridge is in Ciwaru area, Sukabumi Regency,...

The basic problems of blind persons in doing independent activities from one place to another are the mapping of trips to go and home navigation. The use of the conventional, electronic stick or previous research is still lacking. The results of research on localization of positions and mapping for inside...

The decreasing number of quality wood in accordance with the wood class as stipulated by the Indonesian Timber Construction Regulation (PKKI) requires the industry to innovate in providing construction materials from nature that are equivalent to wood. One of the natural materials with large numbers...

Coal fly ash is one of the industrial by-products that is produced from coal combustion. A large amount of coal fly ash is currently dumped at a landfill, while the current utilization of coal fly ash has been limited to the raw material of soil amendment production and cement concrete. Coal fly ash...

The Upstream Bekasi River flood covering an area of 326 ha in 15 inundation points covers five sub-districts of Bekasi City. The Upstream Bekasi River has 2 (two) tributaries, namely Cikeas River and Cileungsi River. The Upstream Bekasi River flood was caused by a relatively small cross-sectional capacity...

The cement fineness is a determining factor in product quality. Estimating this variable in real-time can be extremely useful to maintain the desired characteristics of the product during the cement grinding process, which will also allow a significant increase in the system energy efficiency. This paper...

This paper proposes a vertical farming model, by producing multi-layered plants that are stacked vertically. The research approach was carried out to obtain the technology used to achieve the goal of providing land at low cost, by utilizing the Internet of Things (IoT). The process of watering plants...

One of energy conversion machine is four-stroke engine, that divided into two gasoline engine type and Diesel engine type. In a gasoline engine, the ignition system needs a spark plug. In this research, the researcher used a regular spark plug and platinum spark plug. The regular spark plug is a spark...

Internet of things (IoT) is technology that can make the devices communicate with each other and can be controlled from everywhere. Through this IoT technology, the smart lamp was made so the human can control the lamp in their house from everywhere and the lamp can work automatically based on the environment....

Hemoglobin is a protein in red blood cells that functions as an oxygen-binding agent and also circulates to all organs and tissues of the human body. Changes in hemoglobin levels, both low and high, can indicate health problems. Checking hemoglobin levels in the human body is usually done medically by...

The rise of fires caused by gas leakage, Liquefied Petroleum Gas (LPG) often occurs in the community and can cause material damage, as well as fatalities, in general, gas leaks occur due to problems with the regulator. Therefore we need an LPG leak control system that can provide information on LPG that...

The Roads and slopes are construction that’s directly related to the land. Many cases that occur in the construction are about landslides due to an overload. One way that is often used to strengthen the soil on the slope is stabilization. Volcanic ash has pozzolanic properties, large silica content and...

In infrastructure, soil has an important role to support the construction. The soil function as a basic foothold and accepts all loads caused by construction. İn the implementation of road construction, its often found the condition of the soil with low bearing capacity, especially if the road construction...

Congestion at a crossroads caused by improper traffic light waiting times, can create overcrowding in some branches of the road. Therefore, in this article, we will determine the optimal waiting times of traffic lights at a crossroads by using compatible graphs so that the congestion can be reduced....

This study aims to identify the factors Unemployment Rate (UR) in West Java and develop the appropriate model. This study applied the location (spatial) element using Geographically Weighted Regression (GWR). The GWR model was compared with the global regression. The data used in this study are secondary...

The construction and operation of road infrastructure in Indonesia are facing the damage of flexible pavement. One of the causes of the damage is the failure of the subgrade bearing capacity. The pavement structure requires a large amount of material, especially natural materials namely aggregate and...

Modern architecture and construction design, leading floor system to have longer spans, lighter weight, and lower damping. However, it can cause a floor system to have excessive vibration. Vibration on the floor system is the second most frequent source of complaints from building occupants. Hollow Core...

Megadata MD3000 is a SCADA master used to monitor and control an Indonesian railway company’s microwave communication. The master stores all of the system configurations in a proprietary database file format. This paper introduces a SCADA file format from Megadata. The files consist of digital, analog,...

The husk of durian can be used as a source of cellulose, hemicellulose, lignin, and pectin to generate liquid smoke, and there are several types of researches that have done this. Liquid smokes can be used as natural food preservation because of the presence of antibacterial substance, there are two...

Microwave-assisted pyrolysis of scrap automotive tires allows recovery of energy and useful materials, such as pyrolytic oil, char and gases. Scrap tire were being heated in inert atmosphere at temperature between 400 and 600°C to produce liquid fuel. Tire pyrolytic oil obtained possessed high calorific...

A study on the temperature estimation of the geothermal reservoir from indications contained in Blawan has fully been carried out by the researchers. Geothermometer equations are used for temperature calculations involving the concentrations of Na, K, Ca, and SiO2 in hot water samples that have been...

The quality characteristics of surface roughness and MRR of the end mill process have been considered to be optimized simultaneously. The input parameters that are considered are cutting fluid. cutting speed. feeding speed. and depth of cut. Optimization is carried out using the experimental design of...

Liquid smoke or bio-oil is a renewable energy source that is the result of combustion or pyrolysis of raw materials containing hemicellulose, cellulose, and lignin that can be used for various purposes, both food and non-food applications. The content of anti-microbial and anti-oxidant compounds in liquid...

MongoDB is a document-oriented database technology that supports unstructured data processing. In general, there are two approaches to modeling data relationships between entities in MongoDB, namely the Embedded and Normalized data models. This study analyzes the data processing time performance of both...

Liquid smoke is generated by condensing smoke from pyrolysis process of wooden material which contains lots of lignocellulose (lignin, cellulose, and hemicellulose). Liquid smoke is usually used as food preservation because of their antibacterial ability. There are two important compounds that make antibacterial...

This study aims to identify the impact of Corporate Governance mechanism (proxied by independent commissioner, managerial ownership, and institutional ownership) on Company Value (proxied by Tobin’s Q), and how Financial Performance (proxied by Return on Asset, ROA) moderates the relationship. This study...

Islamic rural bank is a type of banks in Indonesia with a high level of non-performing financing. It is an important issue because will ultimately affect profit as the main goal. This study aims to examine the factors that affect non-performing financing (NPF) at Islamic rural banks in Indonesia, those...

The Islamic banking industry is faced with the problem of a lack of public interest in being involved in Islamic financial transactions. This could cause Islamic banking to be eliminated from the global market in the future. This study aims to examine the factors that influence customer behavioral intention...

The use of expenditure receipts at the Inspectorate considered having a low level of efficiency due to impracticality and recording errors that are often found in recipient data, resulting in wrong recipients of activity funds. This error was caused by the Microsoft Excel system being used was still...

The purpose of this study was to determine the effect of internal factors on efficiency with BOPO and their impact on the financial performance of Islamic commercial banks. The variables tested in this study are Total Assets, Capital Adequacy Ratio, Financing to Deposit Ratio, Non-Performing Financing,...

The non- traditional lodging sector, known as peer to peer (P2P) accommodation, has shown a strong growth and has transformed the hospitality field into a more competitive industry. As an emerging phenomenon, this type of lodging has attracted various attentions and catalysed a vibrant discussion among...

In recent years, the increase in mental disorders among university students has raised concerns about the effects that these disorders have on an individual’s life and the community as a whole. Depression, being the most prevalent mental illness, is being tackled via various methodologies. However, in...

Recent developments in the competitive banking industry show that having loyal customers is an important strategy for bank sustainability because it can give a favorable influence on the performance of banks in the long term. Although past studies have indicated the significance of having loyal customers...

This study aims to establish a stock portfolio following Sharia principles under the premise that investors with Sharia-compliant attentiveness will not only focus on financial risk and return. Implementation of criteria following Sharia principles also needs to be considered, given that there is a prohibition...

This study aims to examine the effect of corporate governance on financial performance of Islamic banking in Indonesia. Corporate governance mechanism determined by board of director, independent commissioner, and sharia supervisory board, meanwhile the financial performance is calculated by using Return...

The competitiveness of vocational colleges can be examined through student satisfaction towards their service quality. While a laboratory is necessary to promote active learning in vocational college, in some cases its quality does not always obtain the student’s satisfaction at an acceptable level....

The adoption of digital payments aims to minimize cash use transactions, provide convenience, acceleration, and efficiency in payment transactions. Polines-Pay is a technology-based electronic payment instrument implemented in Politeknik Negeri Semarang (Polines) as an innovative digital payment product....