bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of preventive maintenance system at PT. Y with reliability engineering approach
Authors: Sembiring Nurhayati , Tambunan Mangara M. , Devany Jeanica 
Published: April 2021

Abstract
Maintenance has a very decisive role in the production activities of a company that concerns the smoothness and congestion of production, delays, and the volume of production and production efficiency. The use of semi-automatic machines at PT. Y influences engine reliability. The reliability of the engine depends on the period of use, the older the machine’s age, its function also decreases. The problem formulated in this study is the preparation of maintenance schedules with due regard to the reliability of critical components on the sterilizer machine. The development of the program is based on the reliability engineering approach, which covers the distribution test of engine damage time interval data, calculation of the mean time between failure (MTBF) of the engine, and the reliability of the engine (reliability) when it is repaired. Secondary data obtained from preventive maintenance at PT. Y.
Identification of medicinal plants used by the community for indigenous poultry health management
Authors: Latifah Siti , Hartini Kansih Sri , Sadeli Achmad , Yuandani  
Published: April 2021

Abstract
Research has been carried out to inventory and identify medicinal plants in the Lama and the Namorih Village, Pancur Batu District. The purpose of this research to find out the types of medicinal plants. The use of natural ingredients as traditional medicines tends to increase because human awareness to back to nature and the prolonged crisis has reduced the purchasing power of modern medicines, which are relatively more expensive. Natural medicine is also considered to have almost no adverse side effects. The research was conducted by exploring the village and holding discussions with breeders who use medicinal plants. The plants that have been obtained are identified and identified. The results obtained 14 species of medicinal plants.
The role of model simulation for replanting activities: A review
Authors: Sembiring Nurhayati , Napitupulu Humala Lodewijk , Sembiring Meilita Tryana , Sipahutar Aulia Ishak 
Published: April 2021

Abstract
There are five largest sectors that affected Indonesia’s economic growth in the fourth quarter of 2019, and one of it is plantation. Steps that can be taken to maintain sustainable plantation productivity are replanting activities. This study will discuss various models that have been used in previous studies to represent replanting activities as a material for decision making to increase the productivity of weaving in a sustainably manner. This research was conducted by a descriptive analysis of the results of previous research activities that already exist. The results of the analysis of prior studies show that the simulation of the replanting model can provide a representation of the actual shape in the field with various influencing factors. Most of the models convert dynamic factors that affect replanting activities into discrete. This is done to facilitate the analysis of replanting activities. The replanting model simulation has an enormous impact on decision making by the plantation management. The model used in general still needs re-analysis to improve the accuracy of the actual representation in the field.
Application of work system engineering analysis
Authors: Siregar I , Nasution T H 
Published: April 2021

Abstract
Through this research, system engineering will be applied related to the analysis of work systems in hospitals, especially government hospitals where the workload is very high. The object of this research is nurses who work in emergency rooms. The purpose of this study is to apply engineering to the medical world that has been carried out in the manufacturing industry. Similarly, operators who work in the industrial world experience high levels of fatigue such as nurses. This is what underlies this research. Nurses have a high level of fatigue compared to nurses who work in other departments. The high level of fatigue makes it difficult for workers to distillate and focus while working and increases the danger of work fortunes produced by human error and affects the psychological condition of the nurse. Based on the above conditions and impacts, further research needs to be done on a work systems analysis to condense nurses tiredness using the macro ergonomics approach of the System Engineering Initiative for Patient Safety (SEIPS) model in hospitals based on observations and interviews of nurses and hospital management. The expected output is that each nurse does not experience severe fatigue to make maximum patient care.
Application-based sales system interface design for dumpling noodles xyz
Authors: Hasugian Ivo Andika , Fernando  , Supriadi  , Luhur Erica 
Published: April 2021

Abstract
The sales system at Dumpling Noodles XYZ currently uses manual sales recording methods so that sales reports made so far are not stored properly. This certainly hinders business development because it is difficult to conduct business evaluations. For business development, this company wants an application that can improve the existing business sales system. Interface design needs to be documented to make it easier to communicate, coordinate all data and information needs with system users so that the designed system can be implemented properly according to the needs of system users. In this paper, the DFD of each level will be explained to produce the desired design. This application has a view consisting of the initial view, main view, customer registration form, supplier registration form, customer purchase form and supplier purchase form. The research results are expected to assist companies in making daily and monthly reports easily so as to increase efficiency and effectiveness in existing data processing.
Affecting factors of CPO yield: An identification
Authors: Sari R M , Siagian D M , Erwin  , Syahputri K , Rizkya I , Siregar I 
Published: April 2021

Abstract
The problem faced in the palm oil processing industry now is the instability of the Crude Palm Oil (CPO) yield. Begin from the condition of Fresh Fruit Bunches (FFB) in harvesting is carried out to the factory transportation, then during the production process. Both of these conditions are factors are considered to be the cause of the instability of the CPO yield. This study aims to identify the factors cause the instability of CPO yield in the palm oil industry, which is expected to help the palm oil industry to achieve the CPO yield target set in each company. Control Chart and Fishbone Diagram are used to find the factors cause CPO yield does not reach the target (instability). From the data collected for 2 weeks, the results show that CPO is not controlled by statistically. Causative factors include the quality of raw materials, production equipment and machinery, worker behavior, and environmental conditions.
Analysis of graduation prediction on time based on student academic performance using the Naïve Bayes Algorithm with data mining implementation (Case study: Department of Industrial Engineering USU)
Authors: Sembiring M T , Tambunan R H 
Published: April 2021

Abstract
One indicator of higher education performance is student graduation presentation on time with a passing percentage of more than or equal to 50%. The abundance of data in the Higher Education Academic Information System (SIA) is not used in measuring the performance of a College, especially the Study Program. The Industrial Engineering Department summarizes student data in the SIA as a database and processes it according to what is needed. During this time, the data were abundant in SIA has not been utilized to assess student performance. When the Study Program conducts a student academic evaluation, the Study Program evaluates it based on the variable number of credits, GPA, and constraints. In the Study Program, an appropriate classification is needed to make it easier to evaluate student performance. The method that is used is the Naïve Bayes algorithm in classifying students’ academic performance USU Department of Industrial Engineering. Attributes are used, among other NIM, Name, Gender, Region of Origin, Origin School, Entrance, and GPA. From the results of testing 173 sample data using the Naïve Bayes algorithm, the pattern formed has a match accuracy of 70.83%, which means that it is useful in predicting student graduation.
Usage of eutectic solvents throughout the dehydration reaction of durian seeds (Durio zibethinus) in producing 5-hydroxymethylfurfural
Authors: Manurung R , Taufik M , Inarto H 
Published: April 2021

Abstract
5-hydroxymethylfurfural (5-HMF) is an essential compound capable of being synthesized from sustainable biomass. The aim of this study was to characterize DES, and obtain data on the relationship between glucose concentration, the amount of DES, reaction temperature, and yield of 5-HMF. The 5-hydroxymethylfurfural (5-HMF) hexose synthesis has been widely studied in published research. The chemical composition of durian seeds (Durio zibethinus) is the water content 10.71%, a fat content 0.38%, protein content 4.76%, and carbohydrate content 83.92%. In recent years, the conversion of carbohydrates has been carried out that is converting biomass to 5-hydroxymethylfurfural. Synthesis of 5-hydroxymethylfurfural from starch by hydrolyzed the starch into glucose under acidic conditions, then it can be used for Dehydration to become 5-hydroxymethylfurfural. This study explores the use of DES-based on Choline Chloride / Ethylene Glycol as a co-solvent in the production of 5-hydroxymethylfurfural. The characteristics of DES-based on Choline Chloride / Ethylene Glycol obtained were the viscosity 238.09 mPa.s, the density 1.115 g/cm3, and pH of 6.3. The best condition for dehydration reaction is the mass ratio of glucose: DES of 1: 5, the temperature of reaction was 90°C with the highest yield 70.34%, and at the initial glucose concentration of 10.05%.
A review of modeling, and simulation for sustainable replanting eucalyptus
Authors: Sembiring Nurhayati , Napitupulu Humala Lodewijk , Sembiring Meilita Triyana , Tiana Yasintha Wahida 
Published: April 2021

Abstract
The growth process of eucalyptus plants in the form of log volume is influenced by abiotic, and biotic factors, which then have a relationship with climate, genotype, soil conditions, both physical, and chemical, silvicultural practices, and forest management. Therefore, to improve forest resilience, and productivity, identification of eucalyptus plants is needed. The most promising tool available to help government, and companies is to use eucalyptus-based models. This model is useful for getting the right planning, assessing the variables that affect climate, and determining long-term direction, and for seeing changes in the forest sector. Individual growth models with trees, and st, anding levels are needed to estimate future forest structures. The purpose of this study is to provide information about the models, and simulations used in the process of replanting eucalyptus plants that have benefits in various sectors of life.
Detection of incipient faults in oil-immersed power transformers based on dissolved gas analysis: Case studies
Authors: Warid W 
Published: April 2021

Abstract
Power transformers are one of the most crucial as well as costly equipment in power grids. Nowadays, a set of factors like the growing load, expanding power consumption, and market liberation affect on the transformer reliability and operational lifetime. At present, numerous approaches are on hand to diagnosis and evaluate their operational conditions. Dissolved gas analysis (DGA) in the insulation oil is an efficient diagnostic scheme which can offer an essential source for transformer failure diagnosis. In this paper, five existing approaches of utilizing dissolved gas data to identify fault kind in power transformers oil are employed. The considered methods are: key gas technique, IEC 60599 technique, Doernenburg ratio scheme, Duval triangle framework, as well as Rogers ratio scheme. These fault diagnosis methods are used to interpret and validate the dissolved gas analysis (DGA) results for four case studies. The experiments are performed on four 15.75 kV/400 kV, 3-Phase, 250 MVA power transformers in a thermal power plant. The obtained DGA results reveal that all considered DGA methods have effectively detected the fault type for each considered case except Duval triangle method which has failed to discover the fault type for two cases.
Fixed-bed column adsorption performance for ammonia removal using adsorbent from zeolite
Authors: Ansari W R , Harahap H , Husin A 
Published: April 2021

Abstract
A study on the performance of fixed-bed column adsorption using natural zeolite Sarulla for ammonia removal has been carried out. The effect of important parameters namely bed height on the breakthrough curve and adsorption performance has been investigated in laboratory scale experiments. The study results show that the adsorption efficiency increases with increasing bed height. These results reveal that the throughput volume of aqueous solution increases with increasing bed height, due to the availability of more adsorption sites and a longer time to reach saturation. Adsorption kinetics were analyzed using the Thomas and Yoon and Nelson kinetics models. The kinetics data can be described well using these two models. The maximum adsorption capacity (qo) was determined using the Thomas kinetics model, the ammonia value was 279.3589 mg / g. However, the study results show that the value of qo decreases with increasing ammonia bed height. For Yoon and Nelson’s models, the rate constant decreases with increasing bed height. The length of time required for 50% of the breakthrough increases with increasing bed height. The kinetics data can be correlated well using both models.
Testing of commercial black painted for flat plate solar collector applications
Authors: Simalango J , Ambarita H , Napitupulu F , Sihombing H V 
Published: April 2021

Abstract
Hight absorption of absorber makes improve the performance of the collector. Solar coating should be safe from chemically, and structurally stable for the variable range of the temperatures. The high cost of coating collectors made an option to utilize commercial black paint to be a coating absorber. Commercial black painted for solar collector absorber surface was discussed. These are four commercial coatings was laboratory tested and compare to get the performance. Identify of properties commercial black painting was used to explore the utility of the coating surface. To improve the absorptance solar commercial coating have been used by the researchers. This would allow the use of the low-cost coating in the solar collectors.
Study of distillation waste by clove for alternative fuel power plant: A review
Authors: Sijabat P Saragih , Siregar Yulianta , Suherman  
Published: April 2021

Abstract
Today, fuel source energy is increasing demand in Indonesia, such as petroleum and coal. Fuel source energy is exhausted and cannot be renewed, therefore renewable energy is one solution for highly energy demand. Innovations of renewable energy like as biopellet from clove leaf refining waste is important for fuel power plant in Indonesia. This research is discuss about characteristics and quality of biopellet from clove leaf refining waste for alternative fuel in electricity generation. The clove leaf is dried up to moisture content from 15% to 30% then made of mesh size 20 and 40 with a milli hummer. then the clove leaf powder was mixed with glue or molasses with a ratio of 80% powder and 20% molasses then printed. Heated of temperature is 90°C, the second specimen is 110°C and the third specimen is 130°C, after it has reached the specified temperature the powder in the mold on the press or pressed with a pressure of 93 kg / cm2. The specimen have been printed and pressed for about 20 minutes. Biopellet can be an alternative fuel solution in Co-firing systems with coal that has been this is the main fuel for steam power generation.
Calculating steam requirement of preliminary heating I (PH I) from evaporation agency II (EA II) and preliminary heating II (PH II) from evaporation agency I (EA I) at sugar factory X
Authors: Trisakti B , Haryanto B , Sidabutar R , Zikir M , Mardhiyani F D P , Irvan  
Published: April 2021

Abstract
In the production of white sugar, the evaporation process is carried out to thicken the runny sap into thick sap. An evaporator is a device used to concentrate a solution consisting of a volatile solvent and a non-volatile solute. Where in the juice solution, the water contained will be evaporated so that it becomes thick sap according to the Brix that has been determined. This paper discusses the refining process in sugar manufacturing plants, especially in the evaporator unit to calculate the steam requirements needed by each evaporator body to achieve the appropriate viscous juice brix. The larger the desired sap brix, the more steam is needed in the evaporator unit.
Production of biomass briquettes from septic tank at pilot scale
Authors: Irvan  , Lubis M F , Matondang N , Nabilah Y 
Published: April 2021

Abstract
Production of biomass briquettes has been conducted at pilot plant scale. Briquettes are a material in the form of powder which are pressed using a machine mixed with adhesive so that they become a solid shape. The process for making briquettes is by adding polyacrylamide as adhesives. The process stages in making fecal briquettes are based on a predetermined procedure, there are several steps, starting from weighing the feces sludge, adhesive (polyacrylamide), water then stirring until printing or pressing, and heating the briquettes in the oven. The best briquettes are produced from sixteen (16) types of briquettes with the longest burning time of 613 seconds and a heating value of 7436.55 cal/g which is obtained from the ratio of raw material: adhesive, pressure scale, and drying time respectively 5 : 2; 105 kg/cm2; and 120 minutes, with moisture content and density values respectively 7.27% and 1.06 gr/cm2. Where the moisture content and briquette value obtained have met SNI, namely ≥ 5000 Cal/g and 7.75%, respectively, in addition, the briquette density obtained has met the American standard, namely 1.0 gr/cm3.
Quality analysis of briquette made of faecal sludge
Authors: Irvan  , Lubis M F , Matondang N , Nabilah Y 
Published: April 2021

Abstract
The purpose of this study is to convert slack waste into charcoal briquettes. The process for making briquettes was carried out by adding polyacrylamide as adhesives. The results showed that the best briquettes were obtained from 16 (sixteen) briquettes, namely the heating value, moisture content, density, and length of combustion were 7436.55 Cal/g; 7.277%; 1.06 gr/cm3; and 613 seconds respectively with the ratio of raw material: adhesive, pressure scale, and drying time were 5:2 105 kg/cm2; and 120 minutes respectively. The characteristics of the calorific value and water content have accordance with the SNI 01-6235-2000 standards, which were ≥ 5000 Cal/g and 7.75%, and the American standard for the density value was 1.0 gr/cm3.
Performance of electrodes Mg/Graphene nanosheet (GNS) and Mg/N-Graphene nanosheet (N-GNS) as anode of battery
Authors: Simanjuntak Roi Roharta , Siburian Rikson , Sebayang Firman , Hutagalung Fajar Yan Sahat T , Aritonang Sri Pratiwi , Simanjuntak Crystina 
Published: April 2021

Abstract
The aims of this research are to know the electrode preparation method of Mg/GNS and Mg/N-GNS, and to evaluate performance Mg/GNS and Mg/N-GNS as anode of battery. This research is an experimental laboratory research. GNS and N-GNS were synthesized by using modified Hummer and N dopants method, respectively. The electrode of Mg/GNS and Mg/N-GNS were synthesized with impregnation method. GNS, N-GNS, Mg/GNS and Mg/N-GNS characterized by using SEM-EDX and Conductivity. The research data shows that GNS and N-GNS are well formed (SEM data) and indicates that Mg metals were deposit well on GNS and N-GNS confirmed with EDX data. The smallest Mg particles size are found on Mg 1.84%/GNS and Mg 2.26%/N-GNS, those are 0.337 and 0.353 μm. Meanwhile, Mg 1.82%/GNS and Mg 2.15%/N-GNS have the largest Mg particles, those are 0.481 and 0.495 μm (SEM data). Conductivity data show, the highest conductivity numbers are 69.9301 μS/cm for Mg 1.86%/GNS and Mg 2,43%/N-GNS (96.1538 μS/cm), comparing among Graphite (79,15 μS/cm) and anode of commercial primary battery (10 μS/cm). All of data conclude that the character and performance of Mg/GNS and Mg/N-GNS may be modified with supporting materials GNS and N-GNS, respectively.
The performance conductivity of Mg/Graphene nanosheet as anode of battery
Authors: Hutagalung Fajar Yan Sahat T , Siburian Rikson , Supeno Minto 
Published: April 2021

AbstractResearch on performance conductivity of magnesium (Mg)/graphene nanosheet (GNS) as anode of batteries was carried out. This research is an experimental laboratory research. The purposes of this research are to synthesize anode material on battery and to evaluate performance of GNS and Mg/GNS as a supporting material and a candidate of electrode on battery anode, respectively. First, GNS was synthesized by using graphite as a raw material (modified Hummer’s method) and electrode of Mg/GNS was prepared with impregnation method. The characterization of GNS and Mg/GNS was carried out by using XRD and conductometer, respectively. The XRD data shows a weak and broad peak on GNS (2θ = 26.0°) indicating GNS was synthesized well and on 2θ = 43.79° indicating that the Mg was deposited inside of the graphene nanosheet. The conductivity data showed that Mg 2.02%/GNS has the highest electric conductivity of Mg (63.6945μS/cm) among to graphite and commercial battery anodes. Mg 1.91%/GNS has the lowest electric conductivity. Based on those data, GNS and Mg/GNS are potentially be used as an anode on battery.
Study of the effect of wrapping type and yeast concentration on the making of peanuts tempeh
Authors: Irvan  , Nabilah Y , Prananta L , Setiyaningsih I , Widi P 
Published: April 2021

Abstract
In recent years, soybean production has continued to decline, while the need for soybeans is still relatively high, domestic soybean needs or 86.95% must be fulfilled from imports. Tempeh has white color, compact texture and specific flavor. White color is caused by the fungus mycelia that grow on the surface of soybean seeds. The compact texture is caused by the fungus mycelia attached on the soybean seeds. Degradation of components in soybeans can cause the formation of specific flavors after fermentation. This research aims to make tempeh by using conventional method. In order to get best result, various variables were investigated such as: type of wrapping media (banana leaf, greaseproof paper, non-perforated plastic sheet), type of raw material (soybeans and peanuts) and yeast concentration (1% and 2%). The results show that on the 0th to the 1st day the weight of the tempeh has increased, while on the 2nd day it decreased. From the organoleptic questionnaire assessed by respondents, the good quality tempeh was made of peanuts compared to soybeans. The best wrapping media for tempeh was banana leaf because it had better aeration than the other wrappers and the more yeast that use, the better the results will be. The more yeast is used, the protein content will decrease because the addition of inoculum concentration allows more numbers of mold Rhizopus sp. grow.