bluuebunny/crossref_metadata_2025_split huggingface dataset:
The effect of shredded plastic waste PET and HDPE substitution on concrete characteristics
Authors: Nursyamsi Nursyamsi , Adil Khoirun 
Published: April 2021

Abstract
The incompetence of recycling schemes has gradually led to alternative ideas to tackle the problem of plastic waste. This research was conducted from the context of environmental and development issues that are growing in Indonesia. This research focuses on how to apply plastic waste into concrete mixtures. PET (Poly-Ethylene Terephthalate) and HDPE (High-Density Polyethylene) plastic waste is shredded into 10-25 mm sizes and substituted as much as 5%, 10%, 15%, and 20% replacing fine aggregate to improve concrete characteristics. The results showed that the PET substitution of 5%, 10%, and 15%, the compressive strength still met the compressive strength plan (f’c = 25 MPa). Whereas in the HDPE substitution variation, it is only the strength of the variation of 5% and 10% that still meets the compressive strength plan. In the split tensile strength test, there was a decrease in the strength of PET substitution with increasing percentage levels, while in HDPE substitution there was an increase in strength at levels of 5% and 10%. Overall, it was concluded that HDPE and PET shredding in concrete have an opportunity to help to reduce the build-up of plastic waste.
Analysis of the effect of sand replacement as a counterweight towards stability of embankment in Belawan Port reclamation
Authors: Roesyanto  , Iskandar R , Surbakti R 
Published: April 2021

Abstract
Soil improvement with preloading and PVD on large area has a side effect, where the load received by soft soil does not quickly release soil pore water. Due to the nature of soft soil which has low permeability and low internal friction angle, the soil will experience lateral deformation, this causes the soil around the preloading embankment to be lifted. In this project, sand replacement is carried out at a location adjacent to other constructions as a counterweight so that the subgrade is not lifted. This analysis aims to determine the effect of installing a sand replacement in the sand key area on the stability of the preloading embankment structure in the reclamation area. The method used in this research is the analytical method as well as numerical method using finite element method program. It was found that using a sand replacement as a counterweight was able to prevent the lifting of the soil, to maintain the stability of the embankment structure and to prevent the subgrade lift in the shipping channel. Sand replacement is able to balance the lateral ground pressure so that it does not increase the surface of the shipping channel. Preloading construction without using a counterweight on soft soil will collapse due to lateral deformation of the preloading pile load.
Structural analysis of traditional Batak Karo house against earthquake
Authors: Tarigan Johannes , Nursyamsi Nursyamsi , Simanihuruk Faisal H , Hani Sheila 
Published: April 2021

AbstractThe Karo traditional house studied wasgerga sepulu dua jabuin Lingga village. The structure is modelled into frames and 3D models. Structural irregularity will be analyzed and spectral response analysis were carried out with SAP 2000. Earthquake resistance is determined based on period, base shear force, friction between rock with piles, story drift and appearance analysis. Horizontally the Batak Karo traditional house is regular but vertically has an irregularity that is mass irregularity, vertical geometry, discontinuity in the direction of holding horizontal force. From the SAP 2000 analysis, a period of 0.107993 seconds was obtained, a basic shear of 94.884 kN, a friction force between the rock with piles a 94.884 kN, story drift of 8.068 mm. Column axial force 152,755 kN, beam bending moment 16,372 kNm and beam shear force 47,982 kN. The upper limit of the period is 0.4676 seconds, dynamic shear force of 80.561 kN, rock friction with 368.55 kN, and 37 mm deviation. Column compressive force 1864.01 kN, beam bending moment 36,277 kNm, and beam shear force 380,725 kN. Based on that, it can be concluded that the Karo traditional house is safe from earthquakes.
Precast box culvert analysis with direct load
Authors: Tarigan Johannes , Nursyamsi Nursyamsi , Farhan Muhamad 
Published: April 2021

Abstract
Manufacturers still use SNI (Standard Nasional Indonesia) concrete for producing concrete in general but there still no Indonesia Technical Guideline SNI which specifically contains for producing or designing the properties of the box culvert itself. In this study, thirty-nine specimens were used with three different models which are 3 beams with fixed - fixed (first model), 3 portals without any ground on the side (second model), 3 portals with land on the side (third model), each of which has a size of 1000 mm x 1000 mm x 160 mm, 1000 mm x 1500 mm x 170 mm, and 1000 mm x 2000 mm x 180 mm with compressive strength 25 Mpa, 30 Mpa, 35 Mpa, 40 Mpa. The dimensions of the box culvert specimens are taken based on the standardized dimensions of Bina Marga then calculated by AASHTO handling with variations in quality and size, and compared with the calculation of simple beams with the placement of fixed-fixed support type and portals with pinned-pinned support type. It has been conclude that thickness of concrete is directly proportionally to the compressive strength, and inversely proportional to deflection.
The application of housing land-use patterns to achieve low CO2 emission in Medan City
Authors: Zahrah Wahyuni , Radiysani Syam Putri 
Published: April 2021

Abstract
Planning of housing is related to land-use management the lack of appropriate and adequate facilities also discovered to be forcing residents to travel to other places, thereby, leading to CO2 emissions. This study was, therefore, aimed to determine appropriate land-use patterns to reduce the environmental damages caused by a continued increase in CO2 emissions, especially in residential areas of Medan city. The control policy implemented in Taman Johor Indah Permai Housing I involves studying housing and life structuring in the area to cope with the effects of CO2 emissions. The study was conducted using a mixed-method with the quantitative aspect applied to process data, while the qualitative aspect was applied to analyze the research problem. The sample population included all housing units in Taman Johor Indah Permai I and the data obtained were comprehensively analyzed based on urban housing theory, spatial planning, and CO2 emissions sources. The characteristics of land use patterns were identified, potential factors contributing to CO2 emissions, and their roles in preventing and overcoming they were determined, after which recommendations were made to prepare housing land-use patterns to achieve low CO2 emissions. The results, however, showed a lack of facilities in the housing area to be influencing the distance traveled by the residents thereby causing more emissions. It’s led to the implementation of policies involving mixed use of land and pedestrian walkways in designing low CO2 emissions urban housing.
Study on concrete compressive strength due to the cement substitution partially by corncob ash
Authors: Aswin M , Nola L , Maranatha E S 
Published: April 2021

Abstract
The development of concrete construction increased gradually, so that it affects the increasing on the cement use. Cement production contributes to produce gas emissions (CO2) which can cause environmental issue. Therefore, alternative materials are needed to use in reducing the using of cement, the aim of this research was to generate the green concrete. Corncob is one of the agricultural waste. In addition, to support green concrete, this research also used cement less than 500 kg/m3. The number of cement will substitute by Corncob Ash (CCA) partially with variations are 0%, 2.5%, 5%, 7.5%, 10%, 12.5%, 15% and 17.5% counted as recently cement weight. The using of specimen consist of diameter 150 mm and height 300 mm. The needed of compressive test each variations made of 3 concrete cylinder samples for testing at 7, 14 and 28 days. Based on the results, it can be seen that CCA is able to supply increasing on concrete compressive strength. So that, CCA can be proposed partially as a cement substitutional.
The relationship between green behaviour and green campus principles: A literature review
Authors: Fachrudin H T , Fachrudin K A 
Published: April 2021

Abstract
The green concept has become indispensable in buildings, environments, and campuses. The relationship between green campus and green behaviour is an important thing to research. This research is to review researches related to these matters. The aim is to analyse indicators of green behaviour that can be needed to create a green campus. Green campus has several principles including building, environment, energy conservation, water conservation, waste management, education, and transportation. Green behaviour can be applied to support the realization of a green campus. The method used is a meta-analysis review with meta-ethnography. A total of 17 papers were analysed to construct a new conceptual framework. The stages of analysis in research on green campus and green behaviour were carried out to obtain indicators from each theme. The results of the analysis show that the main principle of the green campus is energy conservation, while the main indicators of green behaviour are awareness, attitude, subjective norms, behaviour control, and intention. The relationship of green behaviour to the principles of green campus is expected to realize a green campus.
Optimizing Production And Distribution With Distribution Route Management On Perishable Products
Authors: Akbar A.F. , Tulus  , Sawaluddin  
Published: April 2021

Abstract
The research aims to minimize production costs with the management of distribution routes. Direction of the selected distribution route using the Production Routing Problem (PRP) model on the product is easily damaged. The PRP linear Model is resolved using LINGO software. The optimal production cost is Rp 84,701. The optimal route of distribution is stockroom-Sembada Market-Traditional Market-Minggu Market - stockroom. The optimal production amount is 27 pieces.
Model and simulation of arm robot with 5 degrees of freedom using MATLAB
Authors: Sabri M , Fauzi Rahmad , Fajar M S , Geubrina H S , Sabri Faris A M 
Published: April 2021

Abstract
The arm robot with five degrees of freedom is commonly used for industrial or education. For Industrial uses, robot are used for the main step to make the production time more efficient and it can make a product with a good quality. Considering the benefits of arm robot with five degrees in industrial, the robot simulation is used to know the robot torque that will improve and optimizing the movement of the arm robot so the robot can help industry to produce in effective and efficient way. In this paper, the arm robot with five degrees of freedom will analyze the kinematic forward movement and inverse kinematic of the Robot simulation. Interactive simulation system is created using MATLAB software, which is one of the most widely used platforms for modeling and simulating robot systems. Finally, the simulation results verify the kinematic effectiveness in the robot movement and the robot torque according to the robot motion.
Analysis of website service quality with webqual 4.0 integration method
Authors: Syahputri K , Rizkya I , Siregar I , Syardhi O C 
Published: April 2021

Abstract
Universitas Sumatera Utara is one of the state universities that uses a website as an information system to support education. The Academic Portal and Student Directory are websites released by the USU Information System Centre to facilitate academic services for students. However, as a service provider, the Academic Portal website and student directory do not escape complaints from students’ complaints about the quality of service provided and make students feel that the quality of the website is not in accordance with what they expect and give dissatisfaction with the services provided. This research was conducted to analyze the quality of the Academic Portal website and the Student Director i-Student based on the Webqual 4.0 dimension. Analysis of website quality by calculating webqual index to determine the level of quality of the website based on the WQI coefficient interval. If the Academic Portal Dimension usability and Information are in the coefficient interval of 0.60-0.70, it can be said that the quality level of the Academic Portal Website is the Usability and Information dimension is “Good”. Whereas the interaction dimension is at an interval of 0.40-0.59, it can be said that the quality level of Portal A Website is academic.
Optimization of automotive goods preparation pattern for export using algorithm genetics
Authors: Hasibuan S , Indarto K S , Ichtiarto B P , Jaqin C , Hidayati J 
Published: April 2021

Abstract
In the case of delivery of goods for export purposes with large box dimension variations, the arrangement of goods in the fleet becomes very important as it affects the efficiencies of the cost. This situation is felt by all industrial sectors, one of which is the automotive industry. One problem is due to loading container issues, which in this case is due to the use of fleets for unfilled shipping. This is due to the fact that the delivery pattern of goods within the shipping ship is still not optimal. One solution is to optimize the space and layout of the items in the fleet. Genetic algorithm is a method of solving solutions that can be used to solve container loading problems with non-linear and heterogeneous data items, inspired by the theory of evolution. Genetic algorithm can provide optimization solutions for item preparation patterns that practice natural selection methods to get selected individuals that contain the best genes. Then the data will be repeated for several generations and yield the best array pattern output or achieve the target, in this case the minimum free space.
Quality control of cutter case at PT. X with six sigma approach
Authors: Sembiring Nurhayati , Devany Jeanica 
Published: April 2021

Abstract
Quality control is a system of maintaining the quality of products on an ongoing basis. In the industrial world, quality control is essential to meet customer demand. The problem formulated in this study is the assessment of the Defect of the Cutter Case produced by PT. The object in this study is the Cutter Case product. The number of samples used was 450 units. The Cutter Case will be inspected for the number of defective products and defect criteria that are met for each product unit, and the length and width of the product surface. Rules for the type of defect studied were melting, non-jagging, and bent. The method used in solving problems in this study is the Six Sigma method, namely DMAIC (Define, Measure, Analyse, Improve, Control).
The improvement of line balancing in the plastic sack production using theory of constraints
Authors: Wahyuni Dini , Budiman Irwan , Naomi A T 
Published: April 2021

Abstract
This research was conducted in a plastic sack production that is used to package rice or fertilizer. Problems faced by the company are the built-up of work in process and the imbalance of the production line. The research objective is to increase line efficiency of the production process. The stopwatch time study method is used in measuring the time of each element of the task to get the standard working time. Then backward and forward scheduling and line balancing are performed. On the existing line, there are 11 work centres with 11 workers, a smoothing index of 27,813.68 and a line efficiency of 19.42%. The results of balancing the production line using the theory of constraints obtained the best alternative for 11 workers is to form 7 work centres with a smoothing index value of 4,205.41 and a line efficiency of 55.08%. If it is possible to only employ 10 people, the line efficiency can be increased to 64.26% with a smoothness index of 3,142.94.
Green manufacturing design in palm oil mills Sei Mangkei PTPN III
Authors: Lestari Dina , Matondang Rahim , Matondang Nazaruddin 
Published: April 2021

Abstract
Sei Mangkei Mill which has a capacity of 75 tons of FFB/hour treated the waste according to applicable procedures and has complied with the provisions of the Simalungun BLH. Liquid waste (POME) has not been fully utilized because it still causes environmental damage, where POME deposited in open ponds contains methane and carbon dioxide which causes a greenhouse effect. Utilizing renewable energy optimally is one of government programs to create energy independence. Researchers are interested in on processing liquid waste in the form of POME into environmentally friendly products that have economic value using the green manufacturing method at the mill. The results obtained are biogas products can be used as a source of renewable energy. Smallest value was obtained by the intensity of the amount of hazardous substances / chemicals of 0.24% and the largest was obtained in the form of the amount of renewable material at 98.04% based on product cycle analysis related to eighteen types of environmental performance indicators. This value shows that all waste has been used for the benefit of the factory itself and renewable energy is not harmful to the environment. The eco-efficiency value of biogas products stated that the efficiency level of the product was 99.76%.
Business process reengineering android-based sales: Case PT.XYZ
Authors: Amri Syahputra , Napitupulu Humala L , Nazaruddin  
Published: April 2021

Abstract
Increasingly the business market competition is getting tougher. Companies are required to provide better products/services than their competitors. PT XYZ is a company engaged in food manufacturing. The products produced are snacks which are grouped into 4 parts, namely crackers, biscuit noodles and wafers. The business process in the sales department is still very manual and outdated because ordering goods is still over the phone which is considered inefficient. Therefore, improvement is needed by accelerating the time cycle of each activity and simplifying a series of activities as well as the use of technology that cuts business activity activities that have no added value and is repeated. One concept that can be applied is to reengineer business processes (BPR), namely the use of android technology with ESIA method which is able to facilitate marketing from anywhere using an android-based communication device.
Production scheduling using ant colony optimization in furniture industry
Authors: Tarigan U , Siregar I , Siregar K , Tarigan UPP 
Published: April 2021

Abstract
Every association tries to always create an effective and efficient production process. High competition in the industrial world during this time has led to industrial growth which has influence to a company to increase overall productivity in their production activities. For a production activity, in order to obtain an optimum result, all production activities must first be planned properly. Production scheduling is very important in the production process of a product in the company. The first come first served scheduling system currently implemented by the company capable to produce an appropriate scheduling. This causes the high total lead time (makespan) resulted and makespan obtained does not meet the due date. Therefore, it is necessary for rescheduling in order to decrease the overall total lead time to meet customer orders. The study design uses the ant colony algorithm to design the scheduling of door leaf production. The result shows that production scheduling using the ant colony algorithm resulted in scheduling sequences based on the length of lead time are job 1-job 6-job 4-job 3-job 5-job 2. The ant colony method is able to decrease slightly the total lead time product of 3,06%.
Comparison of first come first served and ant colony algorithm method for door leaf production scheduling
Authors: Tarigan U , Siregar I , Sari R M , Syahputri K , Rizkya I 
Published: April 2021

AbstractPrivate company produces doors according to the customer orders (make to order) with various types of products. The company several times experiencing delay of delivery to consumers so that the main cause of the occur in the company caused by the length of the lead time. The length of the lead time occur due to the increasing varied quantity of consumer demand when the product processing step use the same machine. The company implements First Come First Served (FCFS) scheduling system but does not able to produce an appropriate scheduling. The value of the makespan with the FCFS method is 2579,40 hours with the sequence of door leaf job products 1-2-3-4-5-6 namely colonial 6P, Carolina 5P, Napoleon, GD-1L, SP-2P, and GD-D456. The company reschedules to minimize the makespan using the ant colony algorithm and compares the results of the scheduling with the FCFS method. The order of product process using the ant colony algorithm are jobs 1-6-4-3-5-2 followed by colonial 6P, GD-D456, GD-1L, Napoleon, SP-2P and Carolina 5P with lower makespan values of 2500 hours. The results of the actual method using FCFS and the proposed method using the ant colony algorithm comparison shows an efficiency value of 3,057%.
Evaluation of total productive maintenance implementation in manufacture
Authors: Rizkya I , Sari R M , Syahputri K , Tarigan U 
Published: April 2021

Abstract
This paper describes an evaluation of the Total Productive Maintenance (TPM) implementation. The evaluation is done by comparing the results of the application using the 5S foundation and the eight pillars of TPM with the company’s achievement goal of 80%. 5S foundation includes Sort, Set in Order, Shine, Standardize, and Sustain. TPM method consist of eight pillars are include Autonomous Maintenance, Focussed Maintenance, Planned Maintenance, Quality Management, Education and Training, Safety, TPM offices, and Development Management. The evaluation of the TPM implementation is carried out using the nominal group technique method. The group consists of 10 managers, and supervisors are directly involved in implementing 5S on the production floor. The assessment results obtained on the 5S foundation application of 82%, Autonomous Maintenance of 83%, Focussed Maintenance of 75%, Planned Maintenance of 80%, Quality Management of 84%, Education and Training of 88%, Safety, Health & Environment of 78%, TPM office of 73%, and Development Management of 75%.
Implementation of 5S methodology in warehouse: A case study
Authors: Rizkya I , Sari R M , Syahputri K , Fadhilah N 
Published: April 2021

Abstract
Warehouse functions to store products and provide information about the conditions of inventory stored in warehouse, so that it easy access to anyone needed. This paper describes the assessment and application of the 5S work culture in the warehouse area. The 5S is a concept proven able to eliminate waste. One of the Oil Packaging Industries has a low spare part area and is not well maintained. As a result, there are problems such as damage spare parts, which require special handling in storage, due to crushed by metal materials. Besides that, the warehouse area looks dirty, unorganized, has no clear storage boundary, and items are not stored in the right place. As a result, it isn’t easy to find the things you need. The assessment is carried out on the warehouse area based on the 5S criteria. The development of the evaluation shows a score of 1,82. It means that the 5S application in the warehouse area is more suitable with the actual concept. So it is necessary to improve by the 5S implementation principles, namely Seiri, Seiton, Seiso, Seiketsu, and Shitsuke.