bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimizing water condition in tropical brackish water aquaponics: A novel internet of things and machine learning approach
Authors: Ula M , Muliani M , Adek R T , Bustami B 
Published: July 2024

Abstract
This research presents a novel water condition regulation system specifically designed for brackish water aquaponics in the Aceh tropical climates. The study utilizes cutting-edge sensor technologies, intelligent feedback mechanisms, and IoT-integrated precise water condition adjustments. The aim of this approach is to optimize critical water condition indicators including pH, salinity, and dissolved oxygen for shrimp cultivation while enabling the simultaneous growth type of vegetable plants. The methodology encompasses a comprehensive model training procedure, wherein Random Forest and Genetic Algorithms are applied on a computer to predict optimize water condition indicators from historical data. The optimize water condition indicators then will be utilized in real time control and inference by Internet-of-Things (IoT) system based on Arduino microcontroller and dispensing actuators. A forty-day experimental phase in a brackish water aquaponics setup was conducted and verified that IoT system has effectively preserved optimal water conditions to the growth of both fishes and leafy green vegetables. The findings of the research suggest that the proposed IoT regulation system has maintained pH stability, salinity and Dissolved Oxygen at optimize level. The finding also recommend that the lettuce, spinach, and kale have emerged as the most appropriate plants for brackish water aquaponic system. The integration of Random Forest and Genetic Algorithm with IoT technology designate a significant advancement in the field of brackish water aquaponics, providing intelligent alternatives for agriculture in Aceh coastal areas.
The removal of ciprofloxacin from water by Alue Naga and Leungah beach sand
Authors: Prajaputra V , Karina S , Bismi A , Nuufus P H 
Published: July 2024

Abstract
Ciprofloxacin is one of the antibiotics used in various fields such as medical, pharmaceutical, and aquaculture. Excessive use and waste treatment that is not in accordance with procedures cause antibiotic pollution which is very dangerous for living things. This study aims to determine the ability of Alue Naga and Leungah beach sand to overcome the problem of ciprofloxacin pollution from water. Both beach sand was characterized using Fourier Transform Infra-Red (FTIR). Before the adsorption test, a stability test of ciprofloxacin solution was conducted for 6 days of testing with two different temperatures (11°C and 30°C). From the test, it was found that ciprofloxacin tends to remain stable at temperatures ranging from 11°C to 30°C. The adsorption capacity of Alue Naga and Leungah sand was 0.56 mg/g and 0.68 mg/g at 30 mg/L concentration after 3 hours of contact time. Meanwhile, in the adsorption process combined with Fenton-like, the percentage of ciprofloxacin removal in Alue Naga beach sand was 31.78% and Leungah beach sand was 44.3%. From this test, it is concluded that the combination of adsorption and Fenton-like methods enhances the capability of adsorbents to effectively remove contaminated ciprofloxacin antibiotics from water.
Toxicological impact of copper and zinc exposure on liver and gill tissues of Oreochromis mossambicus
Authors: Aliza D , Che Hassan C R , Zuki F M , Suhendrayatna  
Published: July 2024

Abstract
Copper and zinc are needed as essential nutrients for plants, animals, and human’s daily basic activity, however, at high concentrations and prolonged exposure they bring harmful effect to life creature and the environment. Thus, this study aimed at finding out the toxicological impact of copper and zinc on liver and gill tissues of Oreochromis mossambicus. This study used 21 male tilapia (60-100 grams), which grouped into 7 treatment groups, K1 was negative control; K2, K3, and K4 were exposed to 1, 2.5, and 5 mg/L CuSO4; K5, K6, and K7 were exposed to 2.5, 5, and 7.5 mg/L ZnCl2, respectively, for 15 days. Fish liver and gill were collected for histopathological procedure using hematoxylin-eosin. The results showed similar figure of tissues damages between treatment groups, including melanomacrophage center, vacuolar degeneration, cell necrosis, and hemorrhage. The spreading of MMCs in the liver tissue of tilapia fish exposed to copper was higher than in zinc exposure. In gills tissue, several minor, moderate, and severe changes were observed, revealed that the higher the concentration of CuSO4 and ZnCl2 exposure the more severe the tissue damage observed. In conclusion, both CuSO4 and ZnCl2 exposure changes the histopathology of liver and gill of tilapia fish.
Space syntax at the islamic center Masjid At-taqarrub Trienggadeng Pidie Jaya
Authors: Mahjiddin M , Muliadi M , Achmad A 
Published: July 2024

Abstract
At the start of its construction, Masjid At-Taqarrub was the largest mosque in Trienggadeng District. Based on Pidie Jaya Regent Regulation Number 12 of 2020, it was designated as the Islamic Center of Pidie Jaya Regency. Based on the change in the status of mosques as Islamic centers, their needs and functions are certainly increasing. So it is necessary to carry out a retirement evaluation to review the effectiveness of using this mosque. This research aims to identify and analyze the spatial configuration based on the Space Syntax approach in this mosque. The method used is quantitative, collecting observation data for analysis using the depthmapX software. The results of this research show that the minimum connectivity value is 36 and the maximum value is 8.988, while the minimum integrity value is 2,54141 and the maximum value is 31,682. The most effective space is the prayer room. The multipurpose room is considered quite effective, while the overall layout of the entrance area is considered ineffective because it still confuses visitors. It is hoped that this research can provide input for improving spatial organization to make it more effective.
Workload analysis using energy expenditure and the work posture evaluation approach with brief method at PT XYZ
Authors: Akmal S , Trisna  , Hasibuan S 
Published: July 2024

Abstract
PT XYZ is a company operating in the tire retreading sector on JL. Medan-Banda Aceh, Cot Seurani Village, Muara Batu District, Aceh Utara. Retreading truck tires is carried out through several processes such as inspection, grating, repairing, gluing tire, installing tire treads, installing wheels and rings, cooking tires and finishing. The vulcanization process which is carried out manually and repeatedly makes workers easily fatigued, making them vulnerable to injury and the risk of Musculoskeletal Disorders (MSDs). This research aims to calculate the workload of PT XYZ workers. PT XYZ to determine the level of worker fatigue using the Energy Expenditure approach and assessing worker work posture using the BRIEF method to assess work postures that cause complaints of pain in workers’ body parts. Researchers measured the resting pulse and working pulse of 8 workers, then classified the Cardiovascular Load (%CVL) and Energy Expenditure workload levels of the workers and assessed work posture using the BRIEF worksheet. The results of calculating the worker’s workload obtained an average %CVL value of 57.92%, the average result of the worker’s Energy Expenditure was 6,8048 Kcal/8 hours with very heavy work criteria. The average BRIEF work posture value is 3.28 in the high risk category. The suggestions given regarding the problem of workers who easily experience fatigue, high workloads and unergonomic work postures are to increase the number of workers, add benchrest jacks at each work station, add a table with wheels and rings and add chairs for finishing workers, lighten the work and reduce excessive bending activities for tire retreading workers.
Selection of the best coffee bean supplier by using technique method for order preference by similarity to ideal solution (topsis) at CV. ORO coffee GAYO
Authors: Akmal S , Syarifuddin  , Azizah N Q E 
Published: July 2024

Abstract
CV. Oro Coffee Gayo is an industrial sector that operates in the field of bean processing and is also exported directly abroad choosing the right supplier. There are many factors that need to be considered when selection a supplier, including quality, price, accuracy of delivery. The company has contracts with 4 suppliers who already have certification in Aceh and 10 suppliers outside the contract. This research aims to obtain supplier priorities based on the weight of selection criteria and sub-criteria in determining the best coffee bean supplier using the TOPSIS method. The determination of criteria and sub-criteria is based on expert answers using a closed questionnaire. Assessment of the level of importance of the weight of each criterion, sub-criteria and alternative based on the AHP questionnaire and Likert Scale questionnaire. The results of the research show that there are 6 criteria with 13 sub-criteria, where the criterion that has the largest weight is K1=0,37, the sub-criterion that has the largest weight is SK4, appropriateness of price and quality, 0,8771 and supplier 4 has the largest preference value, namely 0,6315. This shows that supplier 4 is ranked first as the best or priority supplier at CV. Oro Gayo.
Pressing Strength of Plastic Bottle Couch as a Form of Waste Management Innovation in UMKM Sobotik
Authors: Ramli I , Zahriah  , Ahmad A , Abdullah N 
Published: July 2024

Abstract
In general, people burn plastic waste openly because they do not know the impact it can cause. Couch from plastic bottles one of the effective alternative innovations. The objective of this study was to determine the strength of the plastic bottle couch from the UMKM Sobotik couch product as the effort to develop creativity in utilizing plastic waste. Plastic bottles that have been glued according to the size and shape designed are given a load (load cell) at the center point of the test object. The shortening of the specimen during compression was observed by two linear variable differential transformers (LVDT) which were placed on the top of the flat surface on different sides of the specimen. The difference in the compressive strength of the plastic bottle couch specimen was based on the variable height of the plastic bottles making up the couch, the cross-sectional shape of the couch, and the position of the fastener (duct tape). There are three types of plastic bottles that make up the couch for this test, namely 1500 ml, 600 ml and 330 ml with the height of each bottle being 290 mm, 226 mm and 170 mm respectively. The results of the compressive load test on the plastic bottles that make up the couch ranged from 241 kgf-621 kgf. The strength of the couch is influenced by the number of adhesives, the location of the adhesive and the shape of the couch. The specimen with the smallest rigidity is a rectangular cross section. Round cross sections tend to have advantages over other cross sections. Due to the pressure received by the test object can be spread evenly throughout the radius of the test object. For a square cross section, there is a cross section that is shorter than the other parts, resulting in non-uniformity of the load received by the parts of the cross section, so that the round shape has great strength.
The movement pattern of app-based transportation in Banda Aceh City, Province of Aceh, Indonesia
Authors: Rizkiya P , Hasan Z , Sawab H , Akbar F , Nazira A 
Published: July 2024

Abstract
Transportation plays a crucial role in fulfilling people’s need to conduct their activities. Cities established transportation systems to serve the needs of people to travel. Technological advancements have led to the emergence of app-based transportation. App-based transportation has emerged as an alternative to public transportation and personal vehicles. The advantages of app-based transportation, such as flexibility, 24-hour services, swift mobility, and convenience, have influenced citizens’ travel behavior. App-based transportation has been available in Banda Aceh since 2017. This research aims to study the movement pattern of app-based transportation in Banda Aceh. The data on the origin and destination of app-based transportation users were collected from 100 drivers using the accidental sampling method. This research utilized GIS software to analyze the movement pattern. The study shows that based on land use, the app-based transportation origin and destination occurred mostly in settlement areas. The highest trip generation occurred in the education center area, followed by the main city center. A polycentric pattern, with the education center as the main origin and destination point, characterizes the movement patterns of app-based transportation in Banda Aceh. It indicates that the main users of app-based transportation are students living around the education center.
Supply chain analysis of Octopus cyanea in Simeulue regency: a case study of production value and contribution of PiSiSi MPA.
Authors: Ulfah M , Alsya C , Erdiasyah E , Turnip N I , Insyafrizal I , Damora A 
Published: July 2024

Abstract
Octopus is a fishery commodity that is the target catch of fishermen in Simeulue Regency because of its very high price. This study aims to identify the supply chain, calculate the value of fishery production and the percentage of octopus (Octopus Cyanea) production in the PiSiSi Simeulue MPAs. This research was conducted in March-April 2023. The research method used was interviews with purposive sampling techniques. Based on the results of the analysis, it was found that the value of production generated from buyers (collectors) was IDR 34,192,104,976 with a total weight of 440.56 tons. The contribution of PiSiSi KKP to the production value of Simeulue Octopus is 9.83%. Based on this research the octopus supply chain starts with the catch of fishermen who are sold to collectors and then sold again to buyers in Sinabang and sold locally and domestically to North Sumatra and Java Island to be processed and then exported to Asia, Europe and America.
Phytochemical screening of ethanolic extract of local Aceh lime (Citrus aurantifolia (Christm.) Swingle) peels
Authors: Sitio R , Akmal M , Marlina  , Gholib  
Published: July 2024

Abstract
Herbal plants are currently attracting world attention and are being widely studied to treat various diseases as an alternative to synthetic drugs. One of the herbal plants often used is citrus lime because it contains high levels of secondary metabolite. Citrus peels are usually thrown away because they are considered waste, even though they have many high-value compounds and show a variety of potential uses in technology and health improvement. Gas chromatography-mass spectroscopy (GC-MS) was used in this study to identify the phytochemical components of native Aceh limes (Citrus aurantifolia (Christm.) Swingle). The results obtained from this study were that the ethanolic extract of lime peels contains twenty-eight metabolite compounds with five main compounds, namely propanedioic acid, dimethyl ester (27.47%), benzeneacetic acid, methyl ester (12.06%), β-bisabolene (5.97%), 4-hexen-1-ol, 5-methyl-2-(1-methylethenyl)-, acetate, (R)-(5.54%), and trans-linalool oxide (5.16%). The results showed diverse secondary metabolites derived from local Aceh limes dominated by ester groups. This indicates the strong potential of local Aceh limes as a source of aromatics and can be further tested as pharmaceutical agents.
Characterization of Aluminium Anodizing for Coffee Industry Exterior
Authors: Mulyaningsih Nani , Pramono Catur , Dwi Emma , Putra Exnacius , Faishal Muhammad Noor 
Published: July 2024

Abstract
Aluminium is a lightweight and malleable metal. So it is widely used for several exterior applications including coffee industry storefronts. The surface of these applications needs hardness characteristics to be more scratch resistant and have attractive aesthetics. One method to improve these characteristics is anodizing. This research aims to produce a harder and more attractive exterior. The method in this research is to conduct aluminium experiments and then anodizing using time variations (12, 20, 28, 36 and 44 minutes). In order to make the hardness safe and durable when used, the anodized aluminium is tested using a hardness test. The optimum value of the test results will be compared with the quality of exterior products on the market. This information will be useful for the aluminium industry to improve the quality of the products produced.
Heterogeneous alkaline catalyst synthesized from local bovine bone wastes for transesterification of palm oil into biodiesel
Authors: Rossani R B , Maisarah M R , Lubis S , Ramli M 
Published: July 2024

Abstract
Local bovine bone wastes, which are abundant in Aceh Province, have been successfully used as biomineral sources to produce heterogeneous catalysts that result in alkaline oxide. This study aimed to produce alkaline oxides by employing a high heat breakdown approach on local bovine bone particles at atmospheric pressure. The physicochemical analysis of the obtained inorganic particles revealed that the predominant component of those obtained inorganic oxide particles was calcium oxides (CaO). Furthermore, the produced alkaline oxide was employed as an alkali oxide catalyst for the transesterification of palm oil (RPDPO) with methanol, yielding methyl ester compounds, which are well recognized as a sustainable and green diesel energy source.
Analysis of energy harvesting on 3-DOF mobile tetrahedron-based sun tracker
Authors: Away Y , Novandri A , Rizal M S 
Published: July 2024

Abstract
The use of solar panels to be placed on mobile platforms is still not able to absorb maximum solar energy. Therefore, we need a sun tracker system that is able to respond to disturbances from above, such as the movement of clouds, and also disturbances from below, such as movements from mobile platforms. The proposed mobile tetrahedron-based sun tracker is capable of fast and continuous response to movement and movement from various directions, with an effective control algorithm that will be able to keep the solar panels always perpendicular to the sun’s rays. This mobile tetrahedron-based sun tracker is a 3-DOF parallel construction with a stepper motor as the actuator. This sun tracker is installed on a moving platform and is capable of tracking the sun in a 3-DOF parallel manner. Test results with PV polycrystalline silicon with normal operating specifications of 5V/2W, show an average voltage measurement of around 2.62V and an average current of around 190.613mA. The average power produced is around 0.798W, with peak power reached around 11:40-12:00, while the lowest power was recorded at 07:00-08:00 and 17:00-18:00. The research results also obtained that the total electrical energy collected for one full day using a sun tracker was 9.571Wh (higher 7.166% than fixed PV).
Detuned reactor for harmonic reduction on 20 kv distribution network Pocut Baren feeder in Banda Aceh
Authors: Ardi M D , Suriadi  , Hafidh  
Published: July 2024

Abstract
Nonlinear loads in distribution network have adverse impacts in the form of harmonic distortion. When the harmonic frequency is close to resonance, the harmonic will be amplified and overloading capacitor bank. Here detuned reactor is inserted in series to avoid from that risk. In this study, the impact of detuned reactor on suppressing the harmonics and power factor improvement are investigated, evaluated and analyzed. The Pocut Baren feeder is chosen as the case of the study. It is a radial distribution network with 28 distribution transformers where the starting point is connected to substation transformers and capacitor banks. Simulation is used to verify the efficacy of detuned reactor. The results shown that detuned reactor is able to reduce voltage harmonics and improve power factor across the distribution line. Although the efficacy wane at the distribution end, it can be compensated from adjusting the detuned reactor value to meet the 5% total voltage harmonic distortion (THDv) threshold at the end of the line. Simulation results confirmed that detuned reactor is able to reduce harmonics from 12% to meet the threshold. Power factors have also been improved beyond 0,9 from previously arround 0,8.
An optimal variable importance for machine learning classification models using modified simulated annealing algorithm
Authors: Rusyana A , Wigena A H , Sumertajaya I M , Sartono B 
Published: July 2024

Abstract
Each machine learning model will generate a different importance variable even though the method used is the same. Interpreting the variable significance is confusing. This study proposes combining several variable importance measures using a simulated annealing algorithm with an initial solution of mean and mode. The study uses simulation and empirical data. The simulation data are divided into three scenarios: no correlation, moderate correlation, and high correlation among predictor variables. The empirical data consist of 24 predictor variables. The machine learning models are classification models of random forest, extreme gradient boosting, neural network, and support vector machine. Based on the simulation data study, the combined variable importance will be optimal when predictor variables have low correlation. The simulated annealing algorithms show convergent objective values around the 25th iteration in empirical data. The more predictor variables, the higher the accuracy of this variable importance. Accuracy is optimal when the number of predictors exceeds ten. The five most important variables in explaining family food insecurity are the education of the family head, the floor type of the house, the number of family members who have a savings account, ownership of land, and decent drinking water.
Thermal comfort evaluation of student dormitory buildings in Syiah Kuala University
Authors: Mahfudha U , Sari L H , Fuady M 
Published: July 2024

Abstract
This study aims to analyse the thermal conditions of the student dormitory building against differences of orientation in tropical climates, which significantly impacts the thermal comfort of dormitory room occupants. Student dormitory building has a multi-floor design that accommodates a variety of daily student activities in it. The dormitory building that was chosen as the object of this study is the women’s dormitory building Rusunawa A which is located in the campus area of Syiah Kuala University. The research method used was quantitative with a descriptive approach. Quantitative data collected in the form of measurement results of physical variables include air temperature, radiant temperature, humidity, and air flow velocity in the sample rooms selected as the research object. Results indicate that the physical variables of thermal comfort in natural building design are influenced by the orientation of the building. Field survey data, based on thermal comfort factors measured in the Student Dormitory building, indicates an uncomfortable temperature exceeding the threshold scale of SNI 03-6572-2001.