International Journal of Application on Sciences, Technology and Engineering

Comparison Emission and Fuel Consumption of Engine of 6000 Watts Electric Generator Fuelled with Biogas and Gasoline

Gede Artha Negara — 2023-05-31

The electric generator with a capacity 6000 watts was prepared in this research to be able to be fuelled with flexible fuel. The engine in this generator was 4 strokes engine, single cylinder of 4 stroke spark ignition engine with cylinder volume of 420 cc that can be operated fully with biogas and if biogas is not available, the engine can also be run by using gasoline with an easy switch mechanism. The method developed in this research was different from the idea of dual-fuel which was the fuel was mixed. Two types of Biogas are prepared in this research, type 1 biogas was purified from H2S and H2O, and type 2 of biogas was purified from CO2, H2S, and H2O. The gasoline type that was used in this work was the pertalite with a research octane number (RON) was 90. The engine was run with no load (idle position) and with a load 250 watts and the effect on emission and fuel consumption were recorded and analyzed. The result indicates that the average fuel consumption of using biogas type 1 is about 44.24 L/Minute in idle position and increases to become 45.35 L/minute with load 250 watts. For biogas type 2 the fuel consumption is found about lower, that is 43.76 L/Minute in idling position and increase to reach 45.04 L/minute for with load 250 watts.It is noted here that by using gasoline the fuel consumption is 0,023 L/ Minutes in idle position and a little bit increase to become 0.024 L/minute for 250-watt load. The CO emission is found at 3.91 % vol. for gasoline engine in idle position and reduce a little bit to become 3.5 % vol. with load 250 watts. The emission is found excellent if biogas is used as a fuel comparing gasoline. For biogas type 1, the CO emission is found 0.06 % vol. in idle position and just a bit increase to become 0.07 % vol. if loaded at 250 watts. The best performance is found for biogas type 2 that the CO emission is found 0.04% vol. and still in this value at loading 250 watts.

Application for New Student Admission at SMKS Al-Akhyar II Jakarta with C4.5 Algorithm

Dwi Eka Meilan — 2023-05-31

Al-Akhyar II Jakarta Vocational High School (Smk) is a school that has been accredited with A superior. However, the application of new student admissions still has some difficulties in knowing the potential of prospective students who will attend school. This makes schools have to selectmore students who will be accepted at Smks Al-Akhyar IIJakarta.Therefore,a method is needed to identify prospective new students at school. Data Mining with the C4.5 Algorithm can be used to select and classify prospective new students at school by making a decision tree based on existing data and selecting prospective students. Data on prospective students whoregisterandtaketests in the 2019 academic year, 2020 and 2021 will be selected using theC4.5method whichwill latersee students who are accepted at Smks Al-Akhyar IIJakarta. The resultsthat have been tested using training data and comparing thetraining dataandtestingdatahaveanaccuracyof97%using theC4.5method.Testswere also carried out on 89 respondents who agreed that this design was carried out to overcome problems at Smks Al-Akhyar II Jakarta.

Dashboard Design For Viewing Online Travel Agent Who Works With Kresna Hotel Wonosobo

Dhewa Gunawan Putra — 2023-05-31

Abstract. Kresna Hotel Wonosobo is an old hotel located in Wonosobo city. Founded in 1917 under the name Grand Hotel Dieng and run by a Dutchman named JW Muthert. In modern times like today, many hotels have collaborated with Online Travel Agents (OTA). This is because OTA can help hotels on the marketing side in a wider scope. Kresna Hotel Wonosobo has collaborated with OTA since 2016. But so far, there has never been an application that can assist the hotel in evaluating, monitoring and assessing OTA activities. So the creation of a dashboard to evaluate, monitor, and assess OTA activities at Kresna Hotel Wonosobo is needed. The dashboard is made using the System Development Life Cycle (SLDC) waterfall model and the data processing process uses the nine step design method. This dashboard is focused on three OTAs, namely Traveloka, AGODA, and Tiket.com. The dashboard has succeeded in displaying all the data needed on the target Key Performance Indicators provided by the hotel. By creating a dashboard and adding a web admin, it is hoped that Kresna Hotel Wonosobo can continue to use it for OTA monitoring in the future.

HEALTHY FOOD MENU RECOMMENDATION SYSTEM AT INDONESIAN GORRY GOURMET COMPANY USING ELECTRE METHOD (ELIMINATION ET CHOIX TRAUDISANT LA REALITE)

Anggito Damartantyo — 2023-05-31

One way to maintain a healthy lifestyle is to consume balanced food intake with proper nutrition and diet. Gorry Gourmet is a company that produce healthy food, which elements to enhance health. This company is overseen by qualified nutritionists to ensure their healthy meal’s. The meal is considered healthy if it provides the body with enough nutritions. There are a number of issues that make it challenging for people to choose "suitable meal" according to user's needs. Since everybody dietary requirements are unique and cannot be generalized, a system that can offer the recommendations of healthy meal will be developed. The result is a website that give recommendation menu meal that meets the user's needs. The system employed Elimination Et Choix Traduisant La Realite (ELECTRE) approach to determine which healthy meal available from the Gorry Gourmet.

Payroll System Design using Waterfall Method in Gadingsari Village Owned Enterprises

Angriawan Yevance Mailoa — 2023-05-31

This study aims to design a payroll information system for Gadingsari Village Owned Enterprises to reduce

errors in the payroll process. The data collection method uses empirical studies with descriptive qualitative and

quantitative approaches. While the design method used is the waterfall method by conducting analysis,

planning, design, system implementation, experimentation, and system maintenance. The resulting system is a

payroll system that can accommodate quite large data such as employee data, benefits, job information,

employee's latest education, and employee status. and a more accurate and faster salary calculation. This

payroll information system has an employee attendance feature to record outgoing and incoming employee

data. shows that this system is easy to navigate, easy to operate, provides sufficient features, precise and

accurate salary calculation process, good data storage, and appropriate output. From this system, all payroll

processes will be more precise, thorough, and faster than the previous manual system used by Gadingsari

village owned enterprises.

Optimization Of Cutting Parameters Of AISI 4140 Material Turning On Carbide Tool Life

Sobron Lubis — 2023-05-31

Optimization of cutting parameters is intended for the cutting process to determine the ability of the tool eye to make cuts in this study, the value of the optimization of the tool life for cutting parameters is varied. In this experiment, a CNC lathe with aisi material 4140 was used. Turning is done with a variation of cutting speed 190m/min, 200m/min, 210 m/min. depth of cut 0.5mm,0.6mm, 0.7mm and feed rate0.1 mm/rev, 0.2 mm/rev, 0.3 mm/rev. With an examination every five minutes to measure the wear of the tool. The data from the measurements were processed using the taguchi method with the orthogonal matrix used is L9(33). The results obtained from the calculation of ANOVA data on each cutting parameter and at each level variation are known that the feed rate has the variable that most affects the cutting speed tool has the most influential variable with the optimal combination of cutting speed 200 m / min, depth of cut 0.5mm, and feed rate 0.1mm / rev.

User Interface Design of West Java’s Intangible Cultural Heritage Website using User Centered Design

Wasino — 2023-05-31

Indonesia is a country that has a very diverse cultural wealth. Intangible cultural heritage in Indonesia is

transmitted from generation to generation. Balai Pelestarian Nilai Budaya Jawa Barat (BPNB) or The

West Java Cultural Values Preservation Centre located in Bandung keeps the preservation of acculturation

culture. BPNB only using Microsoft Access application to document cultural heritage in West Java. This is very

unfortunate, because information technology is actively advancing until this day but the preservation of

local intangible cultural heritage especially in West Java is not accessible to the public. There is also a

chance that younger generation in Indonesia wouldn’t even know a few things about intangible cultural

heritage. This research is conducted to create an user interface design of West Java’s intangible cultural

heritage website using user centred design method. The result of the interface design is as seen fit by the

head of BPNB and already be developed so that BPNB can be easily update and store the records of the West

Java’s intangible cultural heritage and the public can also see the list.

Application of Solar Photovoltaic Technology for Energy Saving and Sustainable Co-Living Buildings

Nathanael Hizkia — 2023-05-31

Abstract. One of the efforts to protect the environment is to follow the Kyoto Protocol, Paris Agreement, and conferences related to global warming. The tangible manifestation of this issue is that buildings have begun to pay attention to the concept of sustainable architecture by changing single-use energy to renewable energy. The purpose of this paper is to find out how much energy can be saved by co-living buildings that apply passive design and solar photovoltaic systems using the EDGE application. The research method used is a quantitative method by paying attention to the calculation of EDGE energy and the total of solar photovoltaic. This paper concludes that the co-living buildings can be categorized as an energy-efficient building with the use of photovoltaic and with a passive design system. Then the building can be classified as an advanced energy-efficient building with an energy saving of 47% and a break-even point of 216 days. The novelty of this paper is that the use of EDGE application that can determine the amount of energy savings that is very significant in communal residential buildings in Indonesia.

Rice Planting Decision Support System Using the Fuzzy Simple Additive Weighting (SAW) Method

Teodora Rikie Lam — 2023-05-31

In the era of evolution 4.0 currently has very rapid technological advances. This technological advancement is very useful in several sectors including the agricultural sector. The agricultural sector in Indonesia is the most superior sector because it is the livelihood of the population in Indonesia as farmers. Human resources are important to improve the social or economic quality in society. Gadingsari Village is one of 4 villages in the Sanden sub-district which is located in the westernmost area which has potential in the agricultural sector. Most residents of Gadingsari village depend on work as farmers. Therefore, it can be said that the agricultural sector has a major role in the economy and welfare of the people of Gadingsari village. Using the FSAW method, it can assist in determining quality yields. This study aims to analyze rice cultivation in Gadingsari village which can help local communities to find out information about planting rice correctly and can produce quality rice. The result of this research is a website to analyze the best rice yields with the criteria of rice varieties, rice seeds, planting, fertilizers, harvesting age, and pests.

Web-based Application for Forecasting Stock Price of Plantation Companies Using ARIMA and FTSMC

Sella Andrean — 2023-05-31

Stock is an investment instrument that is “high risk-high return” which means the higher the potential profit generated, the higher the potential risk faced. Therefore, to minimize this risk, it is necessary to forecast stock prices to help make investment decisions. This research aims to forecast the closing price of plantation company's stock price and compare the accuracy of the forecasting results of the two methods based on the MAPE value. The data used in this study is data on closing prices for AALI, LSIP, and SSMS’s stock price from 31 January 2019 to 31 January 2022 sourced from the Yahoo! Finance. The results in this research are FTSMC method has a higher level of accuracy than the ARIMA method. This is indicated by the MAPE value produced by FTSMC method which is smaller than the ARIMA method. Therefore, the author recommends to forecasting future data using FTSMC method.

E-COMMERCE WEBSITE APPLICATION WITH CUSTOMER LOYALTY AND RECOMMENDATIONS ITEMS DEPENDS ON PRICE FEATURES USING K- MEANS CLUSTERING METHOD

Marcelino Fernandez — 2023-05-31

In the current era of computer technology development, the internet is a media of information that can be accessed across countries. To overcome problems in the commercial system, E-Commerce was created. E-Commerce is a commercial activity using internet media. In the midst of the pandemic Covid-19, many Indonesians have opened E- Commerce to fullfill their daily needs because they have been affected by this Covid-19 pandemic. This program is one of the forms of E-Commerce that was created during the Covid-19 pandemic, starting from December 2020 which was named Maniak Mainan at Indonesian E-Commerce, Tokopedia. Currently the products listed on Tokopedia Maniak Mainan is around 6100 products, therefore a recommendation program is made to provide users with suitable choices according to the price chosen through the bottom of the product page. This program also has a customer loyalty feature that allows users to get discounted prices by adding the nominal amount of purchases on the Maniak Mainan website. The recommendations and customer loyalty made using the K-Means Clustering method obtained using original sales and product data from Tokopedia Maniak Mainan. However, this cluster center will adjusted when the admin uploads a product with a higher or lower price, and the customer loyalty tier will also change if the user's purchase nominal exceeds the previous highest nominal. Through the results of the test, it can be concluded that 20 cluster centers are the right distance for this because it includes the price of products that are nearby. The compatibility test was carried out with the Silhouette Score with the results of 0.579 on the recommendation and 0.689 on the customer tier

Analysis Of Thermal Comfort In L 609 Classroom By Using SST k-ꞷ Turbulence Model

Ryo Gozali — 2023-05-31

In today's era, more and more people spend most of their time indoors, with artificial climatic conditions, where thermal comfort is a basic factor such as a glazing system (ventilation), both for dimensions and material characteristics, this basic factor is very important because it affects the parameters involved in thermal comfort. One of the requirements for thermal comfort is good air circulation, good air circulation can also prevent the spread of the COVID-19 virus that is currently engulfing the world.Therefore, research is needed to analyze the air flow engineering in the room, especially the classroom to get results that will later be seen whether it has met the demands of room comfort, especially thermal comfort. The purpose of this study is to provide recommendations for the configuration of air circulation in the L609 classroom and perform a CFD analysis on air circulation in the classroom which can create thermal comfort. Based on all the simulation results carried out with 2 outlet configurations and 5 different speed fan configurations, the obtained results are in accordance with the ASHRAE 55 standard in 2020 only in the first configuration with a speed of 0.79 m/s. in the second configuration all the simulation results obtained are not in accordance with the thermal comfort limit according to ASHRAE 55 in 2020 because the speed obtained is more than 0.8 m/s and the temperature obtained is more than 297 K. Considering the COVID-19 pandemic, there must be circulation air in order to break down the aerosol concentration of the COVID-19 virus itself. Therefore, the author recommends using a classroom configuration with an open door so that air circulation can flow properly.

Development of the Gadingsari Village Tourism Geographic Information System Application

Raymond Then — 2023-05-31

Gadingsari Village is a city located in Jogjakarta, has cultural diversity as an asset of regional wealth, and must be developed as optimally as possible. Many tourists visit tourist attractions in Gadingsari Village, but there are difficulties in choosing the tourist attractions visited due to limited information about tourist attractions in Gadingsari Village. The other problems are congestion problems, cost problems, time problems,s, and labor problems. The purpose of this study is to create a geographic information system for tourism in Gadingsari village. The system is built using PHP and MySQL programming languages as database management as well as the application of the Dijkstra algorithm used to find the shortest path based on the smallest weight from one point of departure to another. The tests carried out in this study used the User Acceptance Test, aiming to determine the user's understanding of the application created. The resulting geographic information system consists of several features, namely the information feature of tourist places, and the feature of finding the fastest route to the tourist spot. In the fastest route search feature, the Dijkstra algorithm works optimally so that it can quickly find the fastest route to tourist places in Gadingsari Village.

Handle Selection of Storage Furniture for Modern Minimalist Residence at Lavon Swan City, Tangerang

Catherine — 2023-05-31

Furniture design is very influential on the overall appearance in interior design. The selection of models,

materials, finishing, to accessories such as handles is a determining aspect that will affect furniture design. Storage

function is the most important function of a furniture. Storage systems in furniture have several aspects of

consideration such as the size of the storage area, the open-close system of the storage area, including the

model and material of the handle. Harmonization of handle design and the furniture would strengthen the furniture

impression received by the user and the observer. The purpose of this research is to determine the characteristics of

storage furniture handle for living room of modern minimalist residence at Lavon Swan City, Tangerang. Qualitative

method with collection and analysis based on relevant theories and reviewing similar research is used in the process

of making the study by referring to the Kilmer design method. Thereupon from this study, it can be seen that

furniture handle designs that are suitable for designing modern minimalist house storage furniture Lavon Swan City

are cut-out and tip-on-swing type handleless design.

Encrypted Wireless Communication System on UHF Frequency Based on Text Messages

Jerico Alfa Deo — 2023-05-31

Communication is a habitual thing for every human, whetherit's communicating directly orindirectly. When a natural

disaster happens, problems can occur on communication systems. These problems can lead to information being not

received properly, so the two parties communicating didn’t know the content of the message. In this situation,

a two-way radio device is the best solution that can be used to communicate. A two-way radio device enables the user

to communicate without any cellular network or internet, because the radio can be both a transceiver or a receiver

in its own frequency. A common two-way radio device uses UHF frequency range (400 MHz - 520 MHz) because

of the characteristics of this frequency range that can penetrate buildings or vegetation that usually interfere with the

radio signal. However, a two-way radio device has a broadcast and unencrypted characteristic, so that every

conversation that is happening between the radio users can be heard by other users. In an emergency situation such

as a natural disaster, important and confidential information shouldn’t be heard by an unauthorized person. So in

this project, the writers have a goal to design an encrypted text based communication system that works on the UHF

frequency band.

Geographically Weighted Quantile Regression for Assessing the Spatial Variations of the High-Risk Diarrhea on Children Under Five in Bandung, Indonesia

Wara Alfa Syukrilla — 2023-05-31

Abstract. We investigate the impact of the percentage of clean water access, the percentage of handwashing habit, and the toilet category factors on the upper quantile of toddlers’ diarrhea risks in Bandung city, Indonesia using Geographically Weighted Quantile Regression model. We analyzed districts in Bandung, applying Geographically Weighted Quantile Regression with the predictors are the percentage of clean water access, hand washing habit, and toilet category. We focus on the 75^th percentile ( . Breusch-Pagan test was used to detect the spatial heterogeneity. The optimum bandwidth was selected using cross-validation. The results shows that the significance, strength, and direction of the relationship between diarrhea and its risk factors are found to depend on the location. At the upper quantile τ = 0.75, the district named Panyileukan district is predicted to have the highest diarrhea risk. In this district, all of the three predictors are significantly affecting the toddlers’ diarrhea risk with the variable of percentage of houses practicing hand washing habit is observed to reduce diarrhea risk the most. In conclusion, clean water access, handwashing habits, and toilet category are the potential risk factors of high-risk childhood diarrhea. The significance, strength, and direction of the effect varies between districts. This method is powerful as it would allow the decision maker to handle the diarrhea problem aptly based

Meat Mixing Process Analysis of Chicken Nugget

Kevin Tansir — 2023-05-31

Chicken nuggets are food produced from chicken meat processing technology. Making chicken

nuggets is divided into several processes, starting from the preparation of raw materials, the

process of grinding meat, making dough, freezing the dough with liquid nitrogen at a temperature

of -3 to -5◦ C, molding, coating butter, and bread flour, frying at a temperature of 177◦ C, steaming

at 160◦ C, and freezing the finished chicken nuggets at -35◦ C. In this study, a thorough analysis of

the process of making nuggets was carried out.

SMEs’ Eco-Friendly Food Packaging Critical Factors: An Empirical Study

Puji Prabowo — 2023-05-31

Abstract. SMEs are economic driver that need to have a more sustainable business development strategy. Issues arise in food packaging which has a direct impact on environmental damage and pollution. In addition, food packaging is one of the factors of business competitiveness and attractiveness for customers. This study aims to obtain a direct picture from SMEs in the field about whether there is awareness to use eco-friendly packaging, what is their current condition of food packaging, and what they need for the next development strategy. The method used in this study is a qualitative approach using a survey with open-ended questions on 49 SMEs. This study uses a coding approach, content and semantic analysis to explore the study. The findings obtained from this study are that there is awareness and knowledge about the importance of using environmentally friendly products. For the perpetrators, the current conditions are not yet ideal for total use, due to business considerations, access to materials, and high prices. In the future, SMEs actors will focus on their packaging development strategy on several aspects, namely material, design, and cost. SMEs need to increase their skills and knowledge regarding eco-friendly packaging and support from relevant stakeholders in order to become a sustainable business.

Application of Artificial Light in the Interior Design of Green Lake City Cluster East Asia Residential House in Tangerang

Jihan — 2023-05-31

The current residence is a primary need for humans, lighting is one of the requirements for humans to carry

out an activity, therefore lighting is also needed that supports human needs in living activity. In human

activities that require lighting, lighting itself is divided into two types, namely natural lighting and artificial

lighting. Natural lighting is lighting that comes from the sun as a source of light, while artificial lighting is

lighting that is produced by light sources other than natural light. Along with the times, artificial lighting has

various types of lamps, lighting procedures, lighting color display and color temperature. So that artificial

lighting is needed in order to achieve the ideal visual view for activities in every room.

Gamma Irradiation Effect on the Callus Growth and Shoot Regeneration of Pogostemon cablin Benth.

Rut Normasari — 2023-05-31

Abstract. Patchouli is an essential producer of patchouli oil in the perfume industry, and its production needs to be increased to meet market demand. In vitro mutagenesis using gamma irradiation has the potential to produce superior patchouli plants. This study aimed to evaluate the effect of gamma irradiation on callus growth and shoot formation on patchouli callus. Calli were gamma-irradiated at doses of 0, 15, 30, 45, 60, and 75 Gy, then cultured on Murashige and Skoog (MS) medium with the addition of 0.1 mg.L^-1 NAA and 0.3 mg.L^-1 BA for four weeks. The results showed that gamma irradiation inhibited callus growth and shoot formation. Gamma irradiation increased the percentage of explant browning and decreased explant survival, explant formation of shoots, the total number of shoots, number of shoots/explants, fresh weight of callus and shoots, growth index, and growth rate. The higher the dose of gamma irradiation, the smaller the percentage of explant survival and the lower the ability to form shoots with an average number of shoots formed less. The percentage of explants that survived on callus without irradiation and at a low dose of 15 Gy reached 100%, with an average number of shoots formed between 4.34-5.63 shoots/explant. Meanwhile, the percentage of explants that survived at high doses of 60-75 Gy was 76-82%, with an average number of shoots formed about two shoots/explant. The lethal dose (LD₂₀) for explant survival was 67.98 Gy.

Web Based Escape Room Game “La Cosa Nostra” Using WebGL

Yoseph Richardo — 2023-05-31

"La Cosa Nostra" is a two-dimensional website-based escape room game that can be accessed using

internet browser. This game was developed with Unity Game Engine. The player will play as a

detective investigating the case of a missing woman. Testing methods was done by Blackbox testing, Alpha

testing by lecturer and Beta Testing will be using survey form.

Implementing 3D Printing in Business Incubator: A SWOT Analysis

Puji Prabowo — 2023-05-31

Abstract. Sustainable development is a big issue that is important to be considered by various sector, especially in the business sector. In this case, both large and small companies (SMEs) need to think about the right strategy and technology to be applied in their business processes. The manufacturing industry has now evolved with 3D printing technology that makes it easy for business people to make prototypes quickly and cheaply. This study tries to look at the University as an institution that teaches entrepreneurship and incubates business through a Business Incubator. The focus is on what opportunities and strategies exist if Business Incubator in university implement 3D printing as a form of support and education for SMEs to make products and businesses more sustainable. The research method used is SWOT and TOWS analysis. The object of the research is the Business Incubator from a private university in Bandung, Indonesia. The result of this research is the identification of opportunities and positive impacts of using 3D printing in the Business Incubator. In addition, there are strategies that need to be implemented to implement them, in order to accommodate strengths and minimize constraints. This research is useful for universities to make policies and beneficial for SMEs to utilize 3D printing technology in their business processes.

Validation of IES-VE for Assessing Daylight Performance of Building Implementing Horizontal Light Pipe and Shading Systems in the Tropics

Feny Elsiana — 2023-05-31

Abstract. Various daylight simulation tools, which are rapidly developed, become a reliable way for simulating the complex daylighting environment. Empirical validation of the daylight simulation tool is essential in determining its reliability, especially in simulating light transport and shading system in the Tropics. Distinct from previous research, the validation involves Horizontal Light Pipe (HLP), a side window with shading systems in different room aspect ratios and orientations. This study aims to validate the simulation results of Integrated Environmental Solutions-Virtual Environment (IES-VE) Radiance IES with the measurement results of physical scaled models for evaluating HLP, light shelves, and blinds' daylight performance under intermediate and overcast sky conditions. Two physical scaled models 1:10 represent office rooms with HLP and shading systems with different room aspect ratios were constructed. Daylight Factor (DF) and Daylight Ratio (DF) of physical scaled model measurement and IES-VE simulation were compared. The results showed that under intermediate and overcast sky conditions, the Pearson correlation between simulation and measurement results using DR and DF was strong, significant, and positive, as high as 0.84 and 0.80, respectively. The Mean Bias Error between simulation and measurement results under intermediate and overcast sky conditions were -12% and -7.7%, respectively. IES-VE is reliable to evaluate the HLP and shading systems' daylight performance with different room orientations in the Tropics.

Capacity Analysis of Variation Emulative Precast Beam-Column Joints with Finite Element Method

Charles Brianjaya — 2023-05-31

The construction of multistory buildings is currently increasing rapidly. Optimal construction methods are needed particularly in the construction of high-rise buildings. There are two construction methods for multistory buildings that are currently developing, cast-in-place and precast methods. Beam-column joint is important things in both construction methods. In precast systems, the element components and planning affect the structural performance and overall design. Beam-column joint capacity and performance of a plastic hinge relocation method needs to be tested. Testing of the cruciform beam-column joint was carried out using the nonlinear finite element method and compared with the results of laboratory test data. There are 8 beam-column joint models with 2 of them not using plastic hinge relocation method. The results of beam-column joint capacity analysis from manual and finite element methods at yield condition generally give smaller values with a difference of 0,17% - 8,32% than the reference data. While at the ultimate condition, the beam-column joint capacity of the finite element analysis produces a greater value with a difference of 0,52% - 13,83%. The yielding of reinforcement in each model occurs in the predetermined relocation area especially for CBJ90, CBJU and CBJR models.

Lighting Consistency of Master Bedroom Casa Jardin Bekasi with Ergonomic Level of Bedroom Lighting

Angelina — 2023-05-31

To create a livable space, it is necessary to include interior design elements. For all the interior elements,

what I want to emphasize here is the lighting element. If there is no light in an interior, it can be said that the

interior is a “numb” design. With that, designing the right bedroom lighting design is very important to make a

comfortable and decent space to rest from a tiring day. Bedroom lighting must be designed with attention to

functionality and space capacity. The purpose of examining this design in more detail is to create a livable

master bedroom with good interior elements, to suppress the consistency of ergonomic residential design, and

to adapt the insights of interior designers who are fixated on the aesthetics of the room to be more thorough in

many factors such as lighting. Design of the Master Bedroom Casa Jardin Bekasi applies the Rosemary Kilmer

design method to find a design approach that suits the needs of the client, Casa Jardin. The application of

standard lighting requirements at a minimum level and also the requirements for a good light layout can affect the

health aspect, especially ergonomics in the design of the Master Bedroom. Master Bedroom Casa Jardin

Bekasi has a fairly optimal match with existing parameters and was compiled by experts to get good results for

health and ergonomics

Surfactant Flooding Performance Between Carbonate Reservoir and Sandstone Reservoir

Rini Setiati — 2023-05-31

Abstract. High energy consumption must be balanced with an increase in oil reserves. One of them is to increase reserves from existing fields. So far, abundant oil production is still sourced from old or brownfields. This makes many oil companies still make efforts to increase their production on the brownfields. One of these efforts is implementing Enhanced Oil Recovery (EOR), intending to maximize recovery (RF) from the oil field. Enhanced Oil Recovery (EOR) can be categorized as a tertiary production stage to obtain oil in various types of reservoirs, especially heavy oil reservoirs. Around 60% of the world's oil reserves are in carbonate reservoirs, and the rest is sandstone and other lithologies. Therefore, it is crucial to know the characteristics of the reservoir to support the success of the EOR carried out. The stages of tertiary oil production are mainly carried out by chemical means. One widely used method in the field is surfactant injection or surfactant flooding. Surfactant flooding is an EOR method by injecting a surfactant-brine solution into a reservoir filled with oil that the previous step cannot wash away. Of course, surfactant injection carried out in both types of reservoirs will give different results considering the characteristics of each rock. The parameters examined were surfactant adsorption ability by both rocks, alteration of wettability after surfactant was injected, and recovery factor after injection. It was found that the surfactant adsorption on sandstone was low compared to carbonate rock; the wettability alteration was also more effective on sandstone compared to carbonate rock. So that from these two parameters, a higher recovery factor value is obtained in sandstone than carbonate rock reservoir.

The Effects of the Covid-19 Pandemic on Big Data Artificial Intelligence

Suwinto Johan — 2023-05-31

The Covid-19 pandemic has changed people's behavior. Artificial Intelligence is made based on big data of people's behavior. Financial institutions use AI in making credit decisions. The AI basis of credit decisions is made based on existing customer Big Data. This customer's Big Data has changed as a result of the Covid-19 pandemic. Changes in Big Data mean that the AI of financial institutions in decision making must be adapted to the new behavior. This study aims to discuss the changing community behavior variables related to the granting of credit approvals. This study uses a qualitative method with a literature review. This study concludes that length of stay, home ownership, occupation, length of work, expense ratio, age, bank account, awareness of fintech, usage of fintech and demographic variables have changed. These variables need to be adjusted as a result of changes in the behavior of the Covid-19 pandemic.

Space Changes of Batik Entrepreneurs’ Houses in Kampung Batik Laweyan Surakarta

Auliya Rohmah Ramadhani — 2023-05-31

Kampung Batik Laweyan is a batik tourist destination located in the city of Surakarta. Before the COVID-19 pandemic, Kampung Batik Laweyan was visited by all tourists. During the COVID-19 pandemic, tourism in Kampung Batik Laweyan experienced a decline. Some batik entrepreneurs have switched professions to become culinary entrepreneurs, so currently, several new dining areas are emerging. Architectural changes that occur are changing the function of the space in the batik entrepreneur's house into the dining areas. This study aims to identify changes in the function of space in the houses of batik entrepreneurs in Kampung Batik Laweyan. This research method uses the descriptive-qualitative method. The results of this study are in the form of a description of the changes in the function of space that occur.

IDENTIFICATION OF ROAD CONSTRUCTION RISK

Mega Waty — 2023-05-31

Risk identification is an important thing which is the initial identification of risk management. Change Order

which causes the cost of contract items to swell, planning errors and omissions as well as changes in scope

that can be reduced by sharpening the planning results. This research focuses on identifying risks for

change orders for road construction projects in the West Java province. Actual data obtained from 10 road

construction projects from the 2013 fiscal year to the 2018 fiscal year to get the frequency of change orders

that occur in various road construction work and the results obtained are to produce 313 construction

changes with the identification of change order risks in 21 road construction projects with the largest

change order risk identification on the work Asphalt Emulsion Absorb Layer, Type 2 Precast Kerb, Masonry

with mortar, Low strength concrete f'c 15 MPa, Masonry followed by 16 other construction works.

Evaluation Method of Real-Time Face Detection

Ahmad Fawzi — 2023-05-31

Object detection is one of computer technology using image or video. Face detection is closely related Image processing and computer vision are used to detect several objects including human faces, landscapes, cars, etc. Face detection algorithm aims to confirm if an image has a face as the object in it. In this study, face detection uses several methods, namely the Eigenface method, the Fisherface method, and the Local Binary Pattern Histogram (LBPH) method. This study used 10 different subjects. The test was carried out 15 times using each face detection method with constant distance. The face detection process in this study was simulated using JupyterLab. The result showed that LBPH method obtained the highest level of accuracy in between comparison among Fisherface method and the Eigenface method. The accuracy of the LBPH method is 93.90%, while the Eigenface method is 85% and the Fisherface method is 53.33%. Differences in face detection accuracy were found due to the low level of lighting in the room and the use of accessories on the subject.

Blockchain Application for Public Street Lighting in Data Sensor Recording

Wiryo Tanjung — 2023-05-31

Public street lighting is crucial to illuminates streets at night to reduce accidents. But one of the weaknesses of

LED is their humidity and temperature. To make sure the longevity of the public street lighting, thermals

need to be managed. To thermally managed the public street lighting, a way to record humidity and

temperature is needed to take action. Blockchain is considered as a replacement to a conventional database

due to it being more secure compared to a traditional database. This paper is designing a prototype that

utilize a ESP32 microcontroller and an HTU21D as the humidity and temperature sensor. The results

shows both from the serial output of the microcontroller and from etherscan.io websites show successful

data recording.

The Rank of Factors Affecting Labor Productivity on Construction Projects

Celine Faustine — 2023-05-31

Human resources or labor is one of the factors that influence the success of a construction project. Based on this

statement, it is necessary to analyze labor productivity. Many factors can affect labor productivity. This

research aims to determine the ranking of factors that affect labor productivity in high-rise building

construction projects in Jabodetabek. These factors are divided into 2 parts, namely internal factors, and

external factors. Internal factors are factors derived from within labor control and external factors are factors

derived from outside labor control. The method used in this research is a quantitative research method using a

questionnaire. Furthermore, this research is analyzed using IBM SPSS software for validity and reliability

testing and analyzed using the Relative Importance Index (RII) to determine the ranking of these factors.

Based on the results of the validity and reliability tests, 18 variables were declared valid and reliable. The

highest ranking of the factors that affect labor productivity when viewed as a whole is work skills which is a

variable from internal factors with an RII value of 0,906, while the highest ranking of external factors is

equipment quality with an RII value of 0,883.

The Prof. Dr. Satrio Segment Road Evaluation Using Road Safety Audit Method

Ni Luh Putu Shinta Eka Setyarini — 2023-05-31

In recent decades, traffic accidents in Indonesia have become a growing public health problem, that requires attention. Drivers' low understanding of signs, and markings and less strict supervision related to road safety can increase the traffic accident problem. Therefore, it is necessary to reduce the risk of traffic accidents and to improve road safety using the Road safety audit (RSA) method on the Prof. Dr. Satrio road segment. Improve road safety, during the operation and maintenance phase, and prevent the reoccurrence of traffic accidents from research on these roads, then the precise recommendation and countermeasure are carried out on roads.

Comparison of Building Information Modeling and Conventional Methods for Concrete and Rebar Quantity Take-Off

Tika Tresnandhini Kusumaningroem — 2023-05-31

Calculation of Quantity Take-Off (QTO) of concrete and rebar must be carried out accurately and consistently. Design modeling also often changes so that technology is needed to simplify and speed up work. The application of Building Information Modeling (BIM) is one way to reduce errors and speed up QTO calculations. One of the BIM software that can be used to carry out QTO work for concrete and rebar is Revit, which is produced by the Autodesk company. The use of Revit is still often encountered obstacles, but these obstacles can be anticipated by conducting an analysis. The analysis carried out include comparative analysis of calculation results, analysis of initial design time requirements and analysis time requirements if there is a design change, and analysis of advantages and obstacles in using Revit. The data was obtained by conducting interviews and calculating the QTO of concrete and rebar using Revit and conventional methods. The results show that the use of Revit is recommended. This is because Revit can speed up the calculation time for the QTO of concrete up to 49% and the QTO of rebar up to 20% for the initial design stage, the calculation of QTO of concrete if there is a design change up to 90%, and QTO of rebar up to 67% when compared to the conventional method. Respondents also stated that they prefer using the Revit method compared to conventional methods. This study shows that there are no difference results for the QTO of concrete and there is a slight difference for the QTO of rebar up to 0.6742%.

Factors Of Affecting The Occurrence Of Cost Overruns In Construction Projects During COVID-19 Pandemic

Vincent Andian — 2023-05-31

Construction project is a design and specification process that involves coordinating all project resources such as labor, equipment, materials, fund, and technology, to complete the project on time, according to budget and standards. But since 2020 due to the COVID-19 pandemic, many construction projects have experienced Cost Overruns, especially in the jabodetabek area. Cost Overrun is very influential on the success of a construction. Therefore, research is needed on ranking factors that influence the occurrence of Cost overruns on a construction project during the COVID-19 pandemic. In this study, data will be collected through literature studies, then surveyed using questionnaires a Likert scale, a scale of 1-5 then given to each construction service provider to measure the level of influence of factors and by Relative Importance Index (RII) method will find the ranking of factors that influence the occurrence of cost overruns. Of the 20 factors obtained after the validity and reliability test, 13 factors were obtained. Using the RII method sought rankings from the 13th of such factors. The result obtained is the lack of preparation for unexpected costs has the highest influence of 0.811.

STEGANOGRAPHY IMPLEMENTATION OF INSERTION OF CONFIDENTIAL DATA ON DIGITAL IMAGE MEDIA

Kelvin Dharma Kusumah — 2023-05-31

Sending confidential messages through the internet is very vulnerable to theft, many irresponsible parties try to get information from these messages for personal gain. So that the secret message can only be read and understood by certain parties, a way is needed to hide the message, namely with steganography. Steganography is a technique to hide messages in media such as text, images, audio and video so that the media that is inserted looks like normal. Bit-Plane Complexity Segmentation (BPCS) is a steganographic method used in message embedding. This method has a large message insertion capacity. The insertion is done by replacing the complex bit-pane with a secret message block. In this final project, a software is developed that applies the steganography method with the BPCS method on uncompressed images. In addition, tests were conducted to analyze the suitability of the BPCS method on uncompressed images. The final result obtained is a software capable of handling message insertion. The conclusion of this research is that the BPCS algorithm is proven to be able to solve the problem of inserting messages into image media.

Repetitive Project Optimization with Dynamic Programming Method

Erica Hosanna — 2023-05-31

Repetitive Scheduling Method is a scheduling method tailored specifically for projects with repetitive activities.

Project optimization is done to optimize the cost and duration to be as small and fast as they can be, but

applications of project optimization in repetitive projects are inefficient and leaves a lot of room for error.

Research analyses uses dynamic programming with the program Python and Google OR-Tools. This

research starts with designing a set of dynamic programing script for project optimization, testing it on a

project, and comparing it to results based on manual application. Project optimization analyses using dynamic

programming will result on comparisons between cost and duration in a project. The script is then slightly

adjusted and implemented on multiple critical path project. It is concluded that dynamic programming method

is more efficient and faster in project optimization.

Evaluating Livability of South Tangerang City: From Transportation Perspective

Leksmono Suryo Putranto — 2023-05-31

Liveable city is a city planning concept in which the city become the public space. There were many factors

affecting the liveability of cities, one of them was related to transportation. The other factors were access to the

clean water, food, residences, health services, education and a safe and stable environment. This current

paper will validate the questionnaire developed in Universitas Andalas. In this current paper, we used biner,

disagree (1) and agree (2) responses from the respondents using a one sample t-test with the value of 1.5

(the departure from disagree to agree) and 0.05 significant level. In most cases the respondents were agree

that in terms of transportation condition, South Tangerang City was considered to comply the requirements of

a liveable city. The only deficiencies were regarding safety and security of the bicycle lane and regarding

sidewalk accessibility and suitability to be used by people with disability.

COMPARATIVE ANALYSIS OF WIND PRESSURE OF UNTAR MAIN BUILDING

Vincent — 2023-05-31

Wind flows from high to low pressure due to presence of solar heat. The movement of wind in air is freely

exposed to obstacles such as buildings, especially in large cities. Buildings that are exposed to wind create

pressure for building which can be compressive or suction. In this study, wind pressure analysis was used in

three ways, that is with MIDAS GEN software, Autodesk CFD, and with manual calculation analysis

referring to Indonesia National Standard (SNI) 1727:2020. The building modeling used as test is main

building of UNTAR campus 1 with total height 89 m. The tested wind direction moved from south to north

and from west to east at a wind speed 32 m/s. The results of analysis showed that percentage of wind

pressure results between MIDAS GEN with manuals was at least 5.66% for both wind directions and

between CFD and manuals at least 0.7% for wind directions from south to north. The results from CFD also

show that result the main building surface wind pressure for wind flows moving from south to north results in

wind load in the edge area building smaller than in the central area building. The amount of wind pressure in

center of surface can be 4 to 5 times greater than wind pressure at the edge of surface.

2D Web-Based Battle Game "MONSTER BEATer" With Rhythm-Base Combat System

Kevin Sundriansyah — 2023-05-31

“Monster BEATer” is a rhythm genre game with 2D graphics developed for the Web. This game is developed by

Unity game engine with the C# programming language. In this game, player will control the musical note

character Bita to fight against musical notes which turned into monsters. The game has 10 levels with

different songs and obstacles. This game offers the freedom to play using either a PC/Laptop or smart phone as

long as it is connected to the internet. The Monster BEAter game testing is done by blackbox testing, alpha testing

and beta testing methods. The test results show that the Monster BEATer game is a game that can be played

anywhere as long as it has internet connection, has a high level of difficulty and has a unique gameplay.

Development of a 2D Action Adventure Game with Rhythm Element Named “Omnicaelum, The Way Out”

Nevio Tamarindo Rumbay — 2023-05-31

“Omnicaelum, The Way Out” is an action adventure metroidvania game with rhythm element for Windows. The

story follows a knight trapped in a lost land of Omnicaelum, looking for the way out by defeating enemies

and avoiding traps. The game is made with Unity Game Engine using C# programming language to

write the scripts. The game implements a rhythm system where the timing of the enemies’ and traps’ attack

follows the beat of the background music. Testing was done using blackbox testing, alpha testing by

advisors, and beta testing by surveying 30 respondents. The result showed that the game has an interesting

gameplay and the rhythm feature has been well implemented.

Development of Endless Runner Game "UNTARUN" on Web Platform

Audric Clarence Jovan — 2023-05-31

UNTARUN is an endless runner game with a top down perspective. The purpose of this game is to entertain the players by using the web. To play this game is using the arrows keys on the keyboard or virtual buttons on the smartphone. In this game, the player controls the character to run as far as possible and collect collectables while avoiding obstacles. Players can also take a rest at the minigame stage. UNTARUN has a 3D (three-dimensional) view and is played on the web. The Unity game engine and C# programming language is used to develop UNTARUN. This game has only one arena and endless stage. The goal of the game is to get the highest score as possible. Testing was carried out using the blackbox testing method, alpha testing method by the supervisors and beta testing method through a questionnaire filled by 33 respondents. The test results show that the game "UNTARUN" is a game whose difficulty level is above average, entertaining and has appropriate controls so that players can play freely. Most of the players are interested in playing this game again.

Modified K-Nearest Neighbor Web Based Chatbot as Service and Academic Information School

Natanael — 2023-05-31

At a time when everything is done on an Online basis starting from office activities, teaching and learning activities especially administrative activities school. Where in the activity, aninformant needs to be can serve academic and non-academic information needs for para parents of students and other parties. Chatbot is one of the means to overcome these needs by presentingfeatures that allows for someone to ask when and where. Therefore, in the conclusion that chatbot can be a public means especially on schools - schools that can implement their uses as one school information sources other than the school's business. This Chatbot made using the Modified K-Nearest Neighbor method or can be briefed MKNN. MKNN is the latest version of the previous method, K-Nearest Neighbor where in the application MKNN method does the process additional after Euclidean Distance calculation, Weight Voting. Premise from the weight voting method itself is the biggestweight calculation, so chatbot will calculate the value of the shortest distance to the database from the chatbot then after completion, the chatbot will calculate the value weight or information from that distance so that the results that can be from this are the shortestdistance to the data class that is being addressed by carrying the weight of information biggest or most. This is used to facilitate the deep chatbot determine the category of a database so that it can provide answers that more certain and accurate.

Blockchain Technology Implementation on Simple Microcontroller Based Ballots System

Wiryo Tanjung — 2023-05-31

Ballots security and reliability is two of the crucial things that makes digital based ballots system not widely implemented. Paper-based ballots have the downsides of environmental impact on making paper. Blockchain has one of the advantages on the security aspect where the blocks are secured using cryptographic protocol that makes it hard to be hacked. This paper will be examining the possibility of ballots implementation using a microcontroller-based ballots system. The microcontroller is used because it is cheap to implement and it has the capability to sign the blockchain transaction. This paper is a proof of concept for a smaller scale ballots system for a small organization with two candidate option. The blockchain network used in this paper is a Ethereum test network provided by Ropsten. The number of testing done is 60 times total for the two candidate. The smaller scale testing proven to be successful with the transaction confirmed successful in etherscan.io.

Resource Leveling using Two-Stage Scheduling Model for a Highway Construction Project at Jakarta

Rius Wintan — 2023-05-31

Project scheduling relates to series of activities that can have dependencies on each other during implementation. Each series of activities can cause problems from planning resource such as labor, costs, time, and heavy equipment to project implementation. The purpose of this study is to find out how to apply the two-stage scheduling optimization method for resource leveling, create a workforce histogram, and print the results of optimization resource scheduling in the form of LSM (Linear Scheduling Method) diagram. The existence of resource leveling is expected to avoid the problem of sudden resource needs or excessive resource accumulation. The biggest challenge in doing resource leveling is the increasing project duration. The two-stage scheduling optimization model has characteristics of CSP (Constraint Satisfaction Problem) so it will avoid increasing project duration. This optimization model will be carried out twice, assisted by using Microsoft Excel software with add-ins solver. The first stage will optimize the entire activities while the second stage will optimize the segment of non-controlling activities based on the CAP (Controlling Activity Path) that was formed during the first stage. The object of research used is a highway construction project at Jakarta. The results showed a new schedule with lower resource fluctuations.

Application of Materials for Laundry Room Needs in Residential Houses

Gracia Wijaya — 2023-05-31

In residential needs, the laundry room has an essential role, because washing and drying activities cannot be separated from household chores. The modern interior design concept of a laundry room aims to get a comfortable atmosphere for user needs. The interior atmosphere can be formed through the basic design elements consisting of lines, shapes, fields (color and texture), and light spaces. Interior room elements are formed by several two-dimensional fields, namely floors, walls, ceilings and door and window.

In interior design, a project must be described broadly from the selection of floor, wall and ceiling materials, to cabinet furniture upholstery and other materials used to meet the functional, durability and aesthetic requirements of the room.

These materials are often chosen based on aesthetic quality and price with many choices, and the durability of interior finishing is also a major consideration for interior designers. Floors, walls and ceilings must be durable, i.e. able to withstand wear, pressure, and damage, both structurally and in terms of quality, as well as wooden tables and joints, which must be able to withstand wear and tear tests and time.

Mobile Application Development For Measurement Of Learning Outcomes Students Using The Decision Tree Algorithm

Taddo Tamiko — 2023-05-31

During college, students tend to be confused in determining the Program Learning Outcome(PLO) they have completed. In this case, the SKLU application is an application that aims to determine the PLO graduation that has been taken by Android-based students. This application is used to help users as self-reflection or self-measurement so that they can be better in the future. With the C4.5 Method to form a Decision Tree and by determining the level of accuracy through the available datasets, it is concluded that the accuracy rate is approximately 96% in the SKLU application. The data collected is based on the value from FTI Untar directly, so that it gets definite data. The more data collected, the results produced by the application will be more accurate and better, the results produced by the application are still less accurate because of the small number of datasets collected.

Encryption of Audio File Using AES and Blowfish Algorithms

Novario Jaya Perdana — 2023-05-31

Cloud storage has a role to boldly store data so that it can be accessed by various users. The amount of data stored, causes this data to be vulnerable to attack. It takes a method that can guarantee the security of the data. AES has become a trusted encryption method because of its computational power. Blowfish as a newer method is also trusted because it is efficient and effective in storing data. A web-based application was successfully created based on this method. This app is used to test the combination of these 2 methods. The data used in this study is audio data. Audio data has a higher level of complexity than text data in general, so it requires additional processing when encrypted. Based on the test results, it was found that, the results of the data survived against security attacks with the plain text analysis method with a decryption rate of 0.049%. In addition, the method also succeeded in encrypting data at an average speed of 14 seconds, and decrypting data at an average speed of 13 seconds.

Personnel Information System and Applied AHP Method For Selecting The Best Employee at Gadingsari Village

Wilson — 2023-05-31

Currently, we are in the era of the industrial revolution 4.0 where the role of technology is very rapid. This affects the many demands and intense competition for the digitization of the work system. Personnel is one part of the government organizational structure that requires information system in order to be able manage Human Resource (HR) and the other personnel. Its purpose is to regulate the empowerment of employees according to organizational goals. This research is about the Personnel Information System (PIS) which will be designed in order to help Gadingsari Village to manage the administrative section of employees. The design method used is the waterfall method, and the Analytical Hierarchy Process (AHP) method for making decisions to determine the best employees. The results of the design consist of several menus, namely Employee Data, Attendance, Employee Recommendations, Edit Profile, Employee Data Report, Attendance Report, and Managing Admin. The calculation uses the AHP method with the criteria of Responsibility, Work Experience, and Attendance. This calculation can be used for selecting the best employees with acceptable index consistency.

The Design Development and Application of Sustainable Design on Workstations

Destin Connellya — 2023-05-31

The high use of materials in the manufacture of furniture makes the furniture design sector become one of the sectors that use natural resources highly, for example, wood. The uncontrolled use of wood materials will result in the deforestation of forest land which is the largest source of oxygen. Therefore, the researcher wants to analyze recycled materials such as plastic and other wood that are sustainable, this is done to achieve the following objectives: (1) Maximizing the use of recycled materials for furniture to reduce the use of excess materials, (2) Designing eco-friendly furniture to meet the needs of the present without compromising the ability of future generations to meet their own needs, (3) Identify the strengths and weaknesses of recycled materials in furniture design. This research uses qualitative methods and case studies with descriptive approach methods as well as collecting observation data through literature study techniques. The results of the analysis state that furniture made from recycled materials, especially plastic materials, to overcome sea water pollution is not impossible, this is supported by the presence of a British couple, Alexander Groves and Azusa Murakami, who have succeeded in creating some household furniture made from recycled plastic. The conclusion, furniture design with the aim of sustainability can be implemented if the technical aspects are well thought out. This is what will be done in the design of the workstation at the Tokopedia office.