Perpustakaan Universitas Kristen
Indonesia Paulus
Makassar
Temukan koleksi jurnal penelitian ilmiah mahasiswa UKIP
<div> ABSTRACT: This paper presents the design, fabrication, and characterization of a novel 3D-printed helical antenna operating within the 9.4–10.8 GHz frequency band. The antenna, employing a lightweight paper substrate and a strip-based helical structure, exhibits robust circular polarization characteristics and wideband operation. Rigorous simulations predict a peak CP gain of 11.7dBi at 9.8GHz and a high simulated radiation efficiency of 95%. Experimental measurements validate these predictions, achieving a peak CP gain of 11.6 dBi at 9.8GHz. This research demonstrates the potential of 3D-printed helical antennas for diverse applications in modern wireless communication systems, including 5G, satellite communication, and radar. Furthermore, this study leverages the power of Artificial Intelligence (AI) by employing the Grey Wolf Optimizer (GWO), a sophisticated metaheuristic algorithm, to optimize the antenna’s design. The GWO algorithm is utilized to efficiently search the design space and identify optimal values for key parameters, such as the number of turns, helix pitch, and helix diameter, with the objective of maximizing antenna gain to achieve a target of 15dBi. This research highlights the potential of AI-driven optimization techniques in advancing the design of high-performance antennas for emerging wireless communication systems. </div>
<div> Abstract As more and more medical devices, including as mobile phones, sensors, and remote monitoring equipment, require Internet access, wireless networks have gained considerable traction in the healthcare sector. High-performance technologies, such as the forthcoming fifth generation/sixth generation (5G/6G), are needed for data transit to and from medical equipment in order to give patients with state-of-the-art medical treatments. Furthermore, much better optimization techniques must be used when creating its primary components. Intelligent system design affects how all medical equipment operates, which presents a challenging issue in medical applications. Using information from many sources, electronic health records are built and stored there. These data are compiled in several formats and techniques. There are various big data strategies that could be utilised to reconcile the conflicting data. Artificial intelligence, machine learning and deep learning methods can be used to forecast diseases or other problems using the knowledge gathered from big data analytics. With the advent of 5G, augmented reality, virtual reality and spatial computing are all enhanced, which has a profound effect on healthcare informatics by allowing for real-time remote monitoring. With the advent of 5G technologies, healthcare services can be provided over vast distances via a vast network of interconnected devices and high-performance computation. Disease detection and treatment using dynamic data can be accomplished with the help of deep learning techniques such as Deep Convolutional Neural Networks (DCNN). Deep convolutional neural networks that incorporate images of sick regions are frequently employed for classification tasks. Keywords: Smart Healthcare, 5G, Deep Learning </div>
<div> that make this material widely used by humans, among others, the amount is quite abundant in nature, usually still in the form of iron ore or pure iron. It has good mechanical properties (strength and ductility), is easy to work with either the casting method or the machining method so that it can be made according to human wishes, and the price is relatively cheap. This study aims to determine the tensile strength and microstructure of ST. 37 steel which undergoes a process carburizing using coal powder with variations of two temperatures, namely 550 oC and 900 oC. The method used in this research is experimental. The first experiment by testing the tensile and the second experiment by observing the microstructure of steel ST. 37, which has been through a heating temperature of 550 oC and 900 oC. The test results showed that the higher the temperature given in the specimen, the greater the value of the pull-yielding, maximum, and fracture that occurs in the specimen. The tensile strength of steel that has undergone a carburizing process is higher than that of steel that has not undergone a carburizing process. The microstructure after the carburizing process shows that the higher the temperature applied during the carburizing process, the atoms contained therein will change according to the given temperature.<br><br> Keywords: tensile test, microstructure, ST. 37 steel, carburizing process using coal powder </div>
<div> Abstract. ross flow turbines are widely used as turbines for driving micro-scale hydropower plants in rural areas, but their efficiency is still low because cross flow turbines only use one nozzle. The utilization of the potential energy of water is not optimal yet to be converted into pressure and kinetic energy of water in the nozzles with high water velocity hitting the turbine blades. The problem of cross flow turbines with one nozzle has an uneven flow of water to the turbine blades, and it is not effective in converting potential energy into power in the turbine. The purpose of this research is to develop a four-nozzle Cross Flow turbine and test its performance. The method used is to conduct experimental testing in a laboratory that tests the performance of a cross flow turbine using four nozzles. A cross flow turbine with four nozzles has better performance than a cross flow turbine using only one nozzle. The results obtained that the cross flow turbine with four nozzles where the water jets out of the nozzle is more evenly distributed and the flow of water enters the turbine blade runner, resulting in a good impulse reaction in the blades. The conclusion is that the performance of the four nozzle cross flow turbine is able to produce higher turbine rotation, power and efficiency.<br><br> Keywords: Four Nozzle, Cross Flow Tubine </div>
<div> ABSTRACT The general objective of this research is to produce a prototype destroyer that utilizes the exhaust heat from fishing boat engines. While the specific purpose of this research is to produce appropriate technology to produce fresh water for the needs of fishing boats. Increasing the productivity of fishermen through sailing time efficiency while producing sea water into fresh water on fishing boats and increasing the capacity of sea water distillators that utilize heat from fishing boat engines. This research is using experimental method. The distilator is designed as a means of distillation of sea water by utilizing the heat of the diesel engine exhaust gas. The results of the research for 3 hours with a constant engine speed of 2200 rpm were obtained, for testing the volume of 25 liters of distilled seawater obtained 4527 ml of fresh water with a sea water distillation temperature of 90 ° C, distillation effectiveness 70.18% and heat absorption of 1.1643 kJ / s; In testing the volume of 27.5 liters of distilled seawater, it was obtained 4340 ml of fresh water with a sea water distillation temperature of 88 ° C, the effectiveness of the distiller was 68.18% and the heat absorption was kJ / s 1.24 and on the test volume of 30 liters of distilled sea water obtained 4133 ml of fresh water with a seawater temperature of 86 ° C, the effectiveness of the distillator is 66.32% and the heat absorbs 1.308 kJ / s. Water test results obtained from distillation: Water The results of distillation from a volume of 25 liters of sea water obtained pH = 6.8; Salinity = 0 ppt; Water The result of distillation from a volume of 27.5 liters of sea water obtained pH = 6.9; Salinity = 0 ppt; Water The result of distillation from a volume of 30 liters of sea water obtained pH = 6.8; Salinity = 0 ppt. <br><br> Keywords: water volume, performance, destilator. </div>
<div> Abstract. Wind is a renewable energy source that is abundant and can be used for areas that have not been reached by electricity. Wind power plants can be used to meet household-scale electricity needs. The purpose of this study is to design, test, and analyze wind power plants as an alternative power source for home lighting. This research method uses a horizontal type wind turbine that has 3 blades, a three-phase AC permanent magnet generator type wind turbine that can generate electricity up to 300-310 Watts. The results of the wind turbine design have worked well. Testing the voltage and current from the controller to the battery produces the highest voltage of 14 Volts, with a current of 1.38 Ampere at a wind speed of 4.1 m/s. The higher the wind speed, the higher the voltage and current. The magnitude of the DC and AC voltages is determined by the wind speed and also when it is loaded.<br><br> Keywords: Wind energy, wind speed </div>
<div> locus method for the Direct Current Motor Speed Controlled Anchor. The process is carried out by modeling a DC motor into a mathematical equation so that the transfer function is obtained and then simulated using Matlab with the root locus method. The results of the simulation obtained the value of pole (P1)= -10 , pole (P2)= -2, the asymptote intersection point with the real axis 6 and the break away points of the Root Locus leaving the real axis 6. By looking at the root locus system where the roots of the transfer function are located, all poles are to the left of the imaginary axis and it is stated that the system is stable.<br><br> Keywords: Control of direct current motor speed, Root Locus. </div>
<div> Asap rokok yang mencemari lingkungan didalam ruangan maupun diluar ruangan akan memberikan dampak buruk bagi manusia. Dampak buruk yang di alami adalah sistem pernapasan, dikarenakan di dalam asap terdapat bermacam-macam jenis zat yang membahayakan dan dapat meracuni. Oleh karena itu dikembangkan suatu alat yang akan menetralisir asap tersebut yaitu alat pengisapan asap rokok pada suatu ruangan. Alat ini akan mengeluarkan asap dari dalam ruangan, sehingga ruangan tersebut akan bersih dari polutan asap sesuai dengan peraturan pemerintah tingkat udara yang sehat adalah dengan ≤ 50 PPM. Alat ini dikendalikan oleh Arduino UNO yang menggunakan Sensor MQ2 untuk mendeteksi asap, dan LCD 16x2 yang akan memperlihatkan kadar asap yang berada dalam ruangan tersebut. <br><br>Kata Kunci: Asap, Arduino Uno, Sensor, Fan. </div>
<div> Abstrak Sebanyak 23 juta masyarakat Indonesia menikmati subsidi listrik yang diberikan oleh Pemerintah. Penggunaan listrik dengan kapasitas 900 VA dengan membayar Rp 605 per kilo Watt hour (kWh). Monitoring penggunaan energi listrik ini dirancang dan dirakit untuk mengukur arus, tegangan dan daya dari perangkat elektronik yang digunakan sehingga biaya pemakaian energi listik dapat diminimalkan dengan memonitor, mengukur tegangan, arus, dan daya serta energi listrik dengan akurat. Metode yang digunakan adalah metode eksperimen. Sistem monitoring energi listrik berbasis arduino uno berhasil dibuat. Setiap komponen elektronik mengukur tegangan, arus, daya dalam waktu 15, 30, 45 dan 60 menit dan pengukuran dilakukan dari pukul 10:00-11:00 wita. Untuk waktu 15 menit pertama konsumsi energi listrik yang paling besar adalah dispenser = 0,086 kWh dan biaya yang ditimbulkan Rp.52,03- dan terendah adalah kipas angin = 0,006 kWh dengan biaya Rp.3,63,-.Agar bisa memperoleh hasil yang lebih dan akurat dibutuhkan jenis sensor yang lebih baik. <br><br>Kata kunci: Arduino, Sensor PZEM 004T, Energi Listrik </div>