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Journal articles on the topic 'Optimum configuration'

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Published: 3 June 2025

Last updated: 13 July 2025

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1

Suastika, Ketut, Putri Virliani, and D. Aryawan Wasis. "Submarine rudder stern-plane configuration for optimum manoeuvring." MATEC Web of Conferences 177 (2018): 01024. http://dx.doi.org/10.1051/matecconf/201817701024.

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The purpose of the present study is to investigate submarine rudder stern-plane configuration to obtain optimum manoeuvring characteristics. Three configurations are investigated: +, x and y configuration. The equations of motions were derived with the external forces and moments consist of contributions due to the hydrostatics, hydrodynamics and propeller thrust. To obtain the hydrodynamic coefficients and the hydrodynamic derivatives, the lift and drag were calculated using computational fluid dynamics (CFD). The equations of motions were numerically integrated using Eulerian method to obtain the turning circle. Results of the calculations show that the x-configuration gives the smallest tactical diameter, transfer and advance, which is considered as the most optimum rudder stern-plane configuration.

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Lee, Alex C. H., Ramy R. R. Fahmy, and George B. Hanna. "Objective Evidence for Optimum Knot Configuration." World Journal of Surgery 32, no. 12 (2008): 2736–41. http://dx.doi.org/10.1007/s00268-008-9764-9.

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3

Bánky, Tamás, Bálint Horváth, and Tibor Berceli. "Optimum configuration of multiloop optoelectronic oscillators." Journal of the Optical Society of America B 23, no. 7 (2006): 1371. http://dx.doi.org/10.1364/josab.23.001371.

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4

Hanna, S. Y. "Optimum Waterline Geometry for Deepwater Platforms." Journal of Offshore Mechanics and Arctic Engineering 111, no. 3 (1989): 177–82. http://dx.doi.org/10.1115/1.3257145.

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The dynamic behavior of deepwater platforms can be improved by maximizing wave force cancellation at their natural frequencies of interest. This can be achieved by optimizing both the platform waterline geometry, and the structural dynamic characteristics. This study outlines a simplified procedure by which different water-line geometries for deepwater structures can be evaluated. This procedure considers effect of wave directionality. Comparison between different waterline geometries is performed. Results are presented for four, six, eight, sixteen-column, or leg, configurations, as well as for columns (or legs) located in Triangle, Pentagon, and Hexagon configurations. For each configuration, reduction in the external loading as a function of frequency is quantified. Procedures and results presented in this paper can be easily used in selecting optimum platform waterline geometry, leg spacings, and conductor locations in early design stages.

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Venkataramanan, Vijaikrishnan, Ramakrishnan Madhavaneswaran, and Siva Shanmugam. "Steady state analysis of regular hollow pyramidal radiating fin with triangular cross-section." Thermal Science 19, no. 1 (2015): 59–68. http://dx.doi.org/10.2298/tsci120617029v.

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A new configuration for space radiator is proposed introducing a fin of regular hollow pyramidal shape with triangular cross section, giving a higher improvement in heat loss per unit mass than that of other corresponding configurations previously proposed under same working conditions. The significance of the present configuration and its advantage over other regular hollow configurations are discussed and effect of various design parameters on heat transfer is analyzed in presence of radiation interaction with an isothermal base attached to it. Optimum parameters are identified for which improvement in heat loss per unit mass is the maximum. It is found that the fin efficiency decreases with increase in the emissivity & height of the fin and increases with increase in thickness & top radius of the fin. Correlations are presented for optimum design parameters, optimum improvement in heat loss per unit mass and fin efficiency.

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Sharip, Mohd R. M., Ahmed M. A. Haidar, and Aaron C. Jimel. "Optimum Configuration of Solar PV Topologies for DC Microgrid Connected to the Longhouse Communities in Sarawak, Malaysia." International Journal of Photoenergy 2019 (February 19, 2019): 1–13. http://dx.doi.org/10.1155/2019/2657265.

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In the past few years, the prime focus of supplying electricity to the longhouse communities in the rural areas of Sarawak has been initiated based on the utilization of a single-source microgrid configuration. The existing AC power supply-based solar photovoltaic (PV) systems in these areas pose many problems, mainly owing to the stages of conversion, energy losses, and the quality of power transfer. As the solar PV system is a DC source and most of the appliances in longhouse communities could be operated using DC source, an opportunity to design a microgrid with high reliability and efficiency would be achieved by the implementation of an optimal DC microgrid configuration. With this aim, the paper proposes a multiple-source DC microgrid configuration for the longhouse communities in Sarawak. Initially, a framework has been developed to design simulation models for both microgrid configurations (single and multiple sources) using MATLAB Simulink. The configuration of each system consists of a solar PV and energy storage to form a standalone microgrid. Due to the change in system configuration of DC microgrid, in the modeling approach, the standard power flow equations are modified to include solely the DC parameters. To validate the proposed configuration with the associated modeling approach in terms of the power flow reliability, system efficiency, and power-voltage curve, an experimental setup representing the Simulink model has been designed for each standalone microgrid configuration. The configurations have been assessed in the same location with different daily weather conditions. The obtained simulation and experimental results confirm that the proposed configuration of multiple sources is more reliable and efficient than the existing single-source configuration.

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Fajar, Angga S., and Akhmad Aminullah. "Optimum seismic performance estimation of integrated multiple steel pipes bridge pier connected by shear panel damper with ANN method." MATEC Web of Conferences 258 (2019): 02011. http://dx.doi.org/10.1051/matecconf/201925802011.

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This paper discusses the optimum seismic performance estimation analysis of the integrated multiple steel pipes bridge pier connected by shear panel damper (SPD). The optimization result to be expected to result in an easier structural design for the practical engineer. In this study, 405 different structural configurations with 35 and more variations of SPD thickness to be analyzed by non-linear static cyclic in order to quantify its energy dissipation. The optimum energy dissipation to be assumed as analogous with best objective seismic perfor- mance in order avoiding time consumption of numerical analysis. Furthermore, the SPD’s thickness related optimum energy dissipation of each structural configuration was successfully predicted by multi-parameter es- timation analysis with the artificial neural network (ANN) method. As the result, the R-value and the average error value of the estimated optimum SPD’s thickness compared with analytical result were 0.988 and 2.38%, respectively. With the estimated empirical equation result, the practical engineer could determine the structural configuration in the optimum seismic performance easily.

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8

Youssef, Mahmoud A. M., Abdelrahman M. Mohamed, Yaser A. Khalaf, and Yehia S. Mohamed. "Investigation of Small-Scale Photovoltaic Systems for Optimum Performance under Partial Shading Conditions." Sustainability 14, no. 6 (2022): 3681. http://dx.doi.org/10.3390/su14063681.

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Not only are small photovoltaic (PV) systems widely used in poor countries and rural areas where the electrical loads are low but they can also be integrated into the national electricity grid to save electricity costs and reduce CO2 emissions. Partial shading (PS) is one of the phenomena that leads to a sharp decrease in the performance of PV systems. This study provides a comprehensive performance investigation of small systems (consisting of ten modules or fewer) under all possible shading patterns that result from one shading level (300 W/m2 is chosen). The most common configurations are considered for which a performance comparison is presented. Five small systems of different sizes are studied under PS. A new simplifying method is proposed to identify the distinct PS patterns under study. Consequently, the number of cases to be studied is significantly reduced from 1862 to 100 cases only. The study is conducted using the MATLAB/Simulink® environment. The simulation results demonstrate the most outperformed configuration in each case of PS pattern and the amount of improvement for each configuration. The configurations include static series-parallel (SP), static total-cross-tied (TCT), dynamic switching between SP and TCT, and TCT-reconfiguration. The study provides PV systems’ owners with a set of guidelines to opt for the best configuration of their PV systems. The optimum recommended configuration is TCT reconfiguration, rather than dynamic switching between SP and TCT. The less recommended option, which enjoys simplicity but is still viable, is the static TCT. It outperforms the static SP in most cases of PS patterns.

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Hoeller, Arliones, Richard Demo Souza, Hirley Alves, Onel L. Alcaraz Lopez, Samuel Montejo-Sanchez, and Marcelo Eduardo Pellenz. "Optimum LoRaWAN Configuration Under Wi-SUN Interference." IEEE Access 7 (2019): 170936–48. http://dx.doi.org/10.1109/access.2019.2955750.

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Chang, P. C. Y., K. I. Hopcraft, E. Jakeman, and J. G. Walker. "Optimum configuration for polarization photon correlation spectroscopy." Measurement Science and Technology 13, no. 3 (2002): 341–48. http://dx.doi.org/10.1088/0957-0233/13/3/316.

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11

Chen, Kuan. "The optimum configuration of natural convection loops." Solar Energy 34, no. 4-5 (1985): 407–16. http://dx.doi.org/10.1016/0038-092x(85)90052-0.

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12

Dutchenko, P. N. "Optimum equipment configuration for vacuum filtration departments." Metallurgist 41, no. 9-11 (1997): 291–94. http://dx.doi.org/10.1007/bf02802425.

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13

Dong, Jin Feng, Yue Zhang, and Wei Yu Zhang. "Hydraulic Behaviors of Settling Tanks under Two Kinds of Configurations." Advanced Materials Research 610-613 (December 2012): 2493–96. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.2493.

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An object function of hydraulic efficiency for settling tank is presented in this paper. In order to have a more efficient sedimentation tank, a new settling tank with optimum baffle and inlet configuration is presented. The hydraulic behaviors of two settling tanks with different configurations were simulated using FLUENT. The results indicated that choosing appropriate configuration of settling tank can improve the hydraulic efficiency.

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14

Joy, Nithin M., and Lintu Roy. "Determination of optimum configuration among different configurations of two-axial groove hydrodynamic bearings." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 230, no. 9 (2016): 1071–91. http://dx.doi.org/10.1177/1350650115625604.

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15

Dujmovic, Jozo. "Optimizing computer system configurations." Journal of Automatic Control 13, no. 2 (2003): 23–33. http://dx.doi.org/10.2298/jac0302023d.

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We present a quantitative method for selecting optimum configurations of computer systems. For each configuration we specify a set of requirements reflecting user's needs. The level of satisfaction of requirements is called the global preference score. Using this indicator and the total cost of each configuration we solve the following optimization problems: (1) select a configuration which maximizes the global preference score for a constrained cost of computer system, (2) select a configuration which attains a given level of global preference for a minimum cost, and (3) select a configuration which attains the maximum global preference/cost ratio. We first present the optimization method and then a complete case study of computer optimization.

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16

Tadros, Mina, Manuel Ventura, and C. Guedes Soares. "Towards Fuel Consumption Reduction Based on the Optimum Contra-Rotating Propeller." Journal of Marine Science and Engineering 10, no. 11 (2022): 1657. http://dx.doi.org/10.3390/jmse10111657.

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This paper presents the effect of selecting a contra-rotating propeller (CRP) for a bulk carrier at the engine operating point with minimum fuel consumption, as well as ensuring the safety of the propeller in terms of cavitation and noise. Using a developed optimization model, the geometry of a CRP was selected for different propeller diameters, the same propeller diameter as that of a fixed pitch propeller (FPP) installed on the bulk carrier, and at 90% of the FPP diameter. Additionally, each case was optimized with both no-cup and heavy-cup configurations. In general, the CRP showed better performance than the FPP in terms of efficiency, cavitation, and fuel economy. At the same time, the level of performance was increased when considering the CRP cupping percentage. It was concluded that the CRP can achieve a gain in fuel economy of up to 6.2% in a no-cup configuration when compared to an FPP, and up to 11.7% with a cupped configuration.

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17

Maheetharan, Arirajasingham, Arunasalam Raveendiraraj, Omar Qusous, and Robert May. "Design of pile configuration for optimum raft performance." Proceedings of the Institution of Civil Engineers - Geotechnical Engineering 169, no. 2 (2016): 139–52. http://dx.doi.org/10.1680/jgeen.15.00047.

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18

Kukushkin, V. I., A. S. Levenko, and V. V. Serbin. "Choosing the optimum configuration of an aerospace plane." Kosmìčna nauka ì tehnologìâ 13, no. 1 (2007): 15–28. http://dx.doi.org/10.15407/knit2007.01.015.

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SRIVASTAV, S. K., RAJESH PRAKASH, R. S. DATTATRAYAM, S. K. ARORA, B. K. BANSAL, and S. N. BHATTACHARYA. "Configuration of an optimum seismological network for India." MAUSAM 56, no. 2 (2022): 465–72. http://dx.doi.org/10.54302/mausam.v56i2.953.

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India Meteorological Department (IMD) is the nodal agency of Government of India responsible for monitoring seismicity in and around the country. IMD maintains the national seismological network consisting of 47 permanent observatories, in addition to some observatories in northern India for special studies. A 16-element VSAT-based digital telemetry system for close monitoring of seismicity in and around Delhi is also in operation. In addition to IMD, several state/central government organizations, universities and R&D institutions are also operating seismological observatories in various parts of the country. Some of these observatories in the Peninsular shield region have been upgraded in the recent past with state-of-the-art digital broadband seismograph systems, in addition to opening 10 such new digital broadband stations. This paper makes an attempt to assess the magnitude threshold of routinely detecting and locating earthquakes occurring any where in the country with the existing IMD network. Using the seismic wave attenuation characteristics in the Himalayan and Peninsular shield regions, we have estimated epicentral distance up to which a regional earthquake of given magnitude can be detected and located as well. The minimum number of observatories required for uniform azimuthal coverage and accurate determination of hypocentral parameters has also been taken into consideration. An optimum seismological network configuration has been worked out based on the above inputs. It is found from the analysis that the existing IMD network is capable of detecting and locating earthquakes of magnitude 3.5 and above occurring in the mainland of the country, except for a few pockets in Rajasthan, Gujarat, Arunanchal Pradesh and J&K. An attempt has also been made to show that regional earthquake monitoring capability would largely improve by suitably upgrading and integrating the existing seismological observatories operated by various other agencies together with setting up a number of new observatories in the instrumental gap areas.

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20

Gerber, R., and M. H. Watmough. "Linear superconducting OGMS system: optimum configuration and performance." Journal of Physics D: Applied Physics 22, no. 3 (1989): 440–48. http://dx.doi.org/10.1088/0022-3727/22/3/010.

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21

Blasi, L., and G. Del Core. "Particle Swarm Approach in Finding Optimum Aircraft Configuration." Journal of Aircraft 44, no. 2 (2007): 679–83. http://dx.doi.org/10.2514/1.24399.

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22

Casacca, Margaret A., Ziyad M. Salameh, Maria R. Capobianco, and Ross Losch. "Optimum battery configuration for maximum utilization of photovoltaics." Progress in Photovoltaics: Research and Applications 2, no. 1 (1994): 65–72. http://dx.doi.org/10.1002/pip.4670020109.

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23

Burbelo, M. Yo, Yu V. Loboda, and R. O. Slobodian. "Choosing the Optimum Configuration of Electric Distribution Grids." Visnyk of Vinnytsia Politechnical Institute 171, no. 6 (2023): 23–29. http://dx.doi.org/10.31649/1997-9266-2023-171-6-23-29.

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24

Mi, Kai Fu, Jie Zhang, Jian Guo Cao, Hong Bo Li, Fang Wu Cheng, and Wei Dong Hu. "Research on the Roll Contour Configuration for Schedule Free Rolling in Hot Wide Strip Mills." Applied Mechanics and Materials 152-154 (January 2012): 1584–88. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.1584.

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In order to satisfy the flexible rolling schedule of hot steel production, principles and theory for choice of roll contour configuration were described. Additionally, the several typical roll contour configurations which are popular in the world nowadays, and their shape control capability for “rolling of large quantities of strips in same width” and “rolling by strip width increase in sequence” were analyzed with established finite element model of roll stacks. Then, the optimum roll contour configuration for SFR (schedule free rolling) was obtained.

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Jia, Jingbei, and Zhi Zong. "Experimental Study on the Configuration Hydrodynamics of Trimaran Ships." Journal of Marine Science and Application 21, no. 3 (2022): 46–55. http://dx.doi.org/10.1007/s11804-022-00281-y.

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AbstractThis paper presents experimental results on configuration hydrodynamics. Three models are used in the model tests, which are typical of hard, round, and soft chines. Although specific values are different, the influence patterns are similar in the three ship models. A set of different outrigger positions is investigated in calm water and regular waves. A variety of interesting phenomena are observed, among which the splash resistance is the dominant component for a trimaran at high speeds (with Froude number Fr > 0.6). If two small outriggers are placed inside Kelvin’s wave systems of the main hull, a strong splash appears, resulting in a significant resistance increase. Moreover, short and long waves cannot be neglected, for they may excite the motions of much smaller outriggers. This condition leads to non-vanishing heaving at high-frequency and non-normalized pitches at low frequencies. Based on the tests, three spectra of optimum configurations for resistance, longitudinal motions, and transverse motions are presented. These results reveal the optimum configurations of a trimaran hull in terms of hydrodynamic performance, thus providing a very powerful tool for optimum design of trimaran ships.

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Ishak, Mohammad Zulfikar, Azman Miskam Muhamad, Othman Sidek, Muhamad Nazri Murat, and Mohd Azmier Ahmad. "Integrated Thermoelectric Power Generator - Wireless Sensor Node for Remote Area Application." Applied Mechanics and Materials 315 (April 2013): 597–601. http://dx.doi.org/10.4028/www.scientific.net/amm.315.597.

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The performance of a thermoelectric power generator for powering wireless sensor node has been studied and evaluated. This study covers the results obtained from two configurations of thermoelectric cell with heat source temperatures range from 40 to 230 °C. It was found that the highest output voltage is 9.08 V belong to configuration B with two parallel thermoelectric cells. This configuration was capable to power up sensor node compared to configuration A with the lowest heat source temperature at about 200 °C. To enhance the capability of the configurations, DC boost converter circuit has been developed and tested. By connecting to the DC boost converter, configuration A can power up the wireless sensor node with heat source temperature at about 220 °C while the minimum heat source temperature for configuration B was reduced from 200 to 170 °C. This study identified the optimum operation condition to power up wireless sensor node by thermoelectric power generator for remote application and make conclusion as to how to increase the performance of thermoelectric power generator by introducing DC boost converter.

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27

Barnetche, Magdalena, Luis F. González-Portillo, and Rubén Abbas. "Optimum integration of latent heat storage in a solar thermal system for industrial processes: In series or in parallel?" Applied Thermal Engineering 232 (2023) (July 18, 2023): 121090. https://doi.org/10.1016/j.applthermaleng.2023.121090.

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Solar thermal energy holds great potential in decarbonizing the process industry to achieve net-zero emissions. This study focuses on analyzing the optimum integration of latent storage in solar heating and cooling for an industrial process, by comparing two configurations. Configuration 1 connects the thermal energy storage (TES) in parallel with the solar collector and the process, allowing the solar collector outlet stream to be directed to either the TES or the process. Configuration 2 connects the TES in series with the solar collector and the process, ensuring that the solar collector outlet stream always passes through the TES before reaching the process. The solar system also includes a rotary Fresnel collector that supplies heating and cooling to a dairy factory. The two configurations are evaluated by dynamic simulations including transients such as clouds and start-ups. The findings reveal that the parallel layout needs more components to achieve the same controllability and energy supply level as the series layout. Consequently, the parallel layout incurs a higher cost and complex operation. Considering the objective of finding a cost-effective and straightforward solution for the industry sector, the study concludes that connecting the TES in series represents the optimal configuration.

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28

Webber, J. P. H. "Some laminated plate optimum design studies using an interactive computer programme." Aeronautical Journal 92, no. 913 (1988): 107–14. http://dx.doi.org/10.1017/s0001924000022004.

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Summary An interactive computer programme, based on linear-elastic laminated plate theory, is used to study the effect of lay-up geometry on first ply failure loads. A maximum allowable strain failure criterion is used and a number of design problems are considered where searches are made for optimum lay-up configurations for typical carbon fibre reinforced plastic properties. The relative weakness of this material in tension across the fibres, is found to have a significant effect on first ply failure loads. An optimisation technique based on principal load directions is introduced and compared with the familiar 0/90/±45 lay-up configuration.

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29

Ezebuiro, N. C. "Derivation of volatile fatty acids concentration-independent optimum trace elements configuration and elucidation of optimization kinetics of biomethanization processes." Nigerian Journal of Biotechnology 38, no. 1 (2021): 194–208. http://dx.doi.org/10.4314/njb.v38i1.22.

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Trace elements (TEs) requirements for improved volatile fatty acids (VFA) degradation during biomethanization depend on VFA concentration of a reactor and the temperature of the process. While temperature remains relatively constant, VFA concentrations change in the course of biomethanization and this implies that for efficient VFA degradation, different trace elements configurations (TEC) should be supplemented. While this is the most efficient approach, it is impractical and constitutes a challenge for the effective use of TEs in the optimization of biomethanization processes. To alleviate this challenge, we modelled the biomethanization efficiency of various VFA concentration-dependent (VCD) TEs configuration as scenarios and derived a TEs configuration that produced optimum biomethanization across a wider range of VFA concentrations. The study was carried out at 37oC using different concentrations of fixed VFA composition and TEs configurations as scenarios. Response surface model and desirability function were used to determine and compare the biomethanization efficiency of the scenarios, and to derive a VFA concentration-independent (VCI) TEs configuration. Michaelis-Menten kinetics for two parameters was used to ascertain that the mechanism by which TEs supplementation enhanced mesophilic biomethanization was through an increase in maximum reaction rate (MRR). However, the enhancement was accompanied by an insignificant decline in inverse affinity (IA).

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30

Wijaya, Fransisco Danang, Budi Azhari, and Harnoko Stephanus. "Optimum Permanent Magnets Configuration in Flat-Quasi Linear Permanent Magnet Generators." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 6 (2016): 2589. http://dx.doi.org/10.11591/ijece.v6i6.11966.

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<p>Flat-quasi type of linear permanent magnet generators (LPMGs) have been considered to be applied for several applications, such for wave energy conversion and free piston combustion engine. One of the important issues concerning LPMG is the permanent magnets configuration, due to its effects to the generator’s excitation performance. In this paper, a 1 kW flat-quasi LPMG would be designed and built. During the process, optimum permanent magnets configuration was required and researched. The optimum configuration considered the output power and resulted cogging force. Invetigation was then conducted by modifying several variables, including poles’ arrangement, pole length, number of pole, and pole skewing angle. The modification constraints were total permanent magnets’ volume and generator dimension. The results showed that permanent magnet configuration with halbach arrangement, pole length equals 55% of the slot pitch length, and 61.19<sup>o</sup> skewing angle produced the optimum output values.</p>

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Wijaya, Fransisco Danang, Budi Azhari, and Harnoko Stephanus. "Optimum Permanent Magnets Configuration in Flat-Quasi Linear Permanent Magnet Generators." International Journal of Electrical and Computer Engineering (IJECE) 6, no. 6 (2016): 2589. http://dx.doi.org/10.11591/ijece.v6i6.pp2589-2602.

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<p>Flat-quasi type of linear permanent magnet generators (LPMGs) have been considered to be applied for several applications, such for wave energy conversion and free piston combustion engine. One of the important issues concerning LPMG is the permanent magnets configuration, due to its effects to the generator’s excitation performance. In this paper, a 1 kW flat-quasi LPMG would be designed and built. During the process, optimum permanent magnets configuration was required and researched. The optimum configuration considered the output power and resulted cogging force. Invetigation was then conducted by modifying several variables, including poles’ arrangement, pole length, number of pole, and pole skewing angle. The modification constraints were total permanent magnets’ volume and generator dimension. The results showed that permanent magnet configuration with halbach arrangement, pole length equals 55% of the slot pitch length, and 61.19<sup>o</sup> skewing angle produced the optimum output values.</p>

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32

ASTUTI, RINA PUDJI, TRASMA YUNITA, and LINDA MEYLANI. "Konfigurasi Optimum pada Susunan Linear Antena MIMO Mikrostrip Polarisasi Sirkular." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 10, no. 1 (2022): 118. http://dx.doi.org/10.26760/elkomika.v10i1.118.

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ABSTRAKUntuk memastikan sistem antena MIMO memiliki kapasitas kanal yang diharapkan, maka rancangan antenanya harus memenuhi indikator kinerja optimum, yang ditentukan oleh karakteristik dari elemen penyusun dan konfigurasi susunan antena MIMO. Polarisasi antena merupakan aspek yang mempengaruhi mutual coupling antar elemen antena pada MIMO. Sebagai salah satu parameter penting, maka konfigurasi polarisasi elemen antena pada proses desain harus dikaji dengan baik. Pada paper ini sebagai kontribusi penelitian, dilakukan kajian secara mendalam mengenai susunan linear elemen mikrostrip dengan polarisasi sirkular untuk antena MIMO pada frekuensi sub-6 GHz. Hasil penelitian menunjukkan bahwa konfigurasi B dan C yang merupakan konfigurasi polarisasi silang yang memiliki rentang frekuensi 2,04 x dan 2,08 x lebih lebar dibandingkan konfigurasi A, yang memiliki rentang frekuensi terendah berdasarkan Envelope Cross Correlation (ECC), dan memiliki rentang frekuensi 3,9 x dan 3,87 x lebih lebar dibandingkan konfigurasi E yang memiliki rentang frekuensi terendah berdasarkan Diversity Gain (DG).Kata kunci: MIMO, antena, polarisasi sirkular, konfigurasi. ABSTRACTTo ensure MIMO antenna system has the expected channel capacity, antenna design needs to meet the requirement of MIMO antenna optimal performance indicators, that are determined by the characteristics of the constituent elements and the configuration of the MIMO antenna array. Antenna polarization is a feature that affects the mutual coupling between antenna elements in MIMO. Therefore, the configuration of antenna element polarization in the design process needs to be well studied. Our research contribution in this paper is an in-depth study of the linear arrangement of circularly polarized microstrip elements for MIMO antennas at sub-6 GHz frequencies. The simulation results show that B and C configuration as cross-polarizing configuration have 2,04 x and 2,08 x wider bandwidth than A configuration, that has narrowest bandwidth based on Envelope Cross Correlation (ECC), and have 3,9 x and 3,87 x wider bandwidth than E configuration, that having narrowest bandwidth based on Diversity Gain (DG).Keywords: MIMO, antenna, circular polarization, configuration.

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Syarifah, Ratna Dewi, Mila Hidayatul Aula, Andini Ardianingrum, Laela Nur Janah, and Wenny Maulina. "Comparison of thorium nitride and uranium nitride fuel on small modular pressurized water reactor in neutronic analysis using SRAC code." Eastern-European Journal of Enterprise Technologies 2, no. 8 (116) (2022): 21–28. http://dx.doi.org/10.15587/1729-4061.2022.255849.

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Comparison of thorium nitride (ThN) and uranium nitride (UN) fuel on small modular PWR in neutronic analysis has been carried out. PWR in module is one type of reactor that can be utilized because of its small size so that it can be placed on demand. Neutronic calculations were performed using SRAC version 2006, the data library using JENDL 4.0. The first calculation was fuel pin (PIJ) calculation with hexagonal fuel pin cell type. And the second calculation was reactor core (CITATION) calculation using homogeneous and heterogeneous core configurations. ThN and UN fuels use heterogeneous configurations with 3 fuel variations. The reactor geometry was used in two fuels are the same, with diameter and height active core was 300 cm and 100 cm. In this research, Np-237 was added as a minor actinide in the UN fuel to reduce the amount of Np-237 in the world and also reduce the k-eff value. For ThN fuel, Pa-231 also added in the fuel to reduce the k-eff value. The optimum configuration of UN fuel reached when used heterogeneous core configuration case four with percentage of U-235 in F1=5.5 %, F2=7 % and F3=8.5 % also with the addition of Np-237 0.2 % and fuel fraction 56 %. It has a maximum excess reactivity value 12.56 % %∆k/k. And then, the optimum configuration of ThN fuel reached when used heterogeneous core configuration case three with percentage of U-233 in F1=2 %, F2=4 % and F3=6 % with the addition of Pa-231 0.5 % and fuel fraction 53 %. It has a maximum excess reactivity value 7.67 % %∆k/k. The comparison of optimum design of UN and ThN fuel shows that the ThN fuel has the k-eff value closer to critical than UN fuel. Therefore, in this study, ThN fuel is more suitable for use in PWR reactors because it has a small excess value and can operate for 10 years without refueling

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34

Ratna, Dewi Syarifah, Hidayatul Aula Mila, Ardianingrum Andini, Nur Janah Laela, and Maulina Wenny. "Comparison of thorium nitride and uranium nitride fuel on small modular pressurized water reactor in neutronic analysis using SRAC code." Eastern-European Journal of Enterprise Technologies 2, no. 8 (116) (2022): 21–28. https://doi.org/10.15587/1729-4061.2022.255849.

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Comparison of thorium nitride (ThN) and uranium nitride (UN) fuel on small modular PWR in neutronic analysis has been carried out. PWR in module is one type of reactor that can be utilized because of its small size so that it can be placed on demand. Neutronic calculations were performed using SRAC version 2006, the data library using JENDL 4.0. The first calculation was fuel pin (PIJ) calculation with hexagonal fuel pin cell type. And the second calculation was reactor core (CITATION) calculation using homogeneous and heterogeneous core configurations. ThN and UN fuels use heterogeneous configurations with 3 fuel variations. The reactor geometry was used in two fuels are the same, with diameter and height active core was 300 cm and 100 cm. In this research, Np-237 was added as a minor actinide in the UN fuel to reduce the amount of Np-237 in the world and also reduce the k-eff value. For ThN fuel, Pa-231 also added in the fuel to reduce the k-eff value. The optimum configuration of UN fuel reached when used heterogeneous core configuration case four with percentage of U-235 in F1=5.5 %, F2=7 % and F3=8.5 % also with the addition of Np-237 0.2 % and fuel fraction 56 %. It has a maximum excess reactivity value 12.56 % %∆k/k. And then, the optimum configuration of ThN fuel reached when used heterogeneous core configuration case three with percentage of U-233 in F1=2 %, F2=4 % and F3=6 % with the addition of Pa-231 0.5 % and fuel fraction 53 %. It has a maximum excess reactivity value 7.67 % %∆k/k. The comparison of optimum design of UN and ThN fuel shows that the ThN fuel has the k-eff value closer to critical than UN fuel. Therefore, in this study, ThN fuel is more suitable for use in PWR reactors because it has a small excess value and can operate for 10 years without refueling

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Barrett, Charles E., Lincoln Zotarelli, Lucas G. Paranhos, et al. "Optimum Planting Configuration for High Population Plasticulture Grown Cabbage." HortScience 50, no. 10 (2015): 1472–78. http://dx.doi.org/10.21273/hortsci.50.10.1472.

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Florida is a major fresh-market cabbage (Brassica oleracea L. var. capitata) producing state in the United States. The current cabbage production system relies on bare ground and subirrigation that requires a large volume of water to irrigate the crop. The bare ground system facilitates a maximum of 48,438 plant/ha, while there is a potential to increase plant population per area using plasticulture and drip irrigation. The objectives of this study were to determine the optimum cabbage plant population and plant arrangement that maximizes marketable yield per area for a high cabbage population plasticulture system. Cabbage was grown on 1.2-m-wide raised beds with black plastic mulch and drip irrigation. Plants were grown in either three or four rows with in-row plant spacings ranging from 15 to 35 cm and plant populations ranging from 41,518 to 129,167 plants/ha. Cabbage marketable yield increased as in-row spacing increased. Yields ranged from 19.7 to 69.7 Mg·ha−1. Marketable yield was not different between 3 and 4 rows for in-row spacings above 25 cm. The 15 and 20 cm in-row spacing produced significantly lower yields in the 4-row configuration as compared with the 3-row configuration in Fall and Winter 2011. Wider in-row spacings produced a greater percentage of heads of marketable size while reducing the percentage of small heads when compared with narrower in-row spacings. Mean head weight increased as in-row spacing increased and a 3- or 4-row configuration with an in-row spacing between 25 and 30 cm had consistently high yields in all three seasons compared with narrower in-row plant spacings. These results indicated that with a high population plasticulture system variable plant populations could be selected. In-row plant spacings between 30 and 35 cm may be beneficial for early plantings while a 25-cm spacing could be more productive for later plantings, especially when weather conditions are favorable.

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Astuti, Rina Pudji, Eva Lucky Wijaya, Trasma Yunita, and Harfan Hian Ryanu. "Optimum Polarization Configuration of Planar Circular Patch MIMO Antenna." JURNAL INFOTEL 14, no. 1 (2022): 20–29. http://dx.doi.org/10.20895/infotel.v14i1.748.

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Multiple Input Multiple Output (MIMO) is a key technology that plays an important role in achieving the 5G requirement due to its capability to increase channel capacity. However, the increase of channel capacity is influenced by several aspects such as mutual coupling. Many methods are done to decrease the mutual coupling effect such as polarization arrangement of the MIMO antennas. This study on the polarization arrangement of a circular patch MIMO antenna at 3.5 GHz was performed. Four elements of the MIMO antenna are arranged with several polarization configurations both in Co-Polarization and Cross-Polarization. Both simulation and measurement results showed that MIMO with Co-Polarization has a slightly wider bandwidth equal to 295.25 MHz compared to Cross-Polarization with a bandwidth of 274.63 MHz, due to better return loss performed by the former. However, from the mutual coupling perspective, it is observed that MIMO with Cross-Polarization can reduce the mutual coupling from -17.6676dB into -22.462 dB compared to Co-Polarization with the same element distance.

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Suzuki, Tsutomu. "Optimum Sequence and Spatial Configuration in Allocating Public Facilities." Journal of the City Planning Institute of Japan 23 (October 25, 1988): 61–66. http://dx.doi.org/10.11361/journalcpij.23.61.

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Wang, B. P., Y. K. Chang, K. L. Lawrence, and T. Y. Chen. "Optimum design of multiple configuration structures for frequency constraints." AIAA Journal 29, no. 10 (1991): 1761–62. http://dx.doi.org/10.2514/3.10801.

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TSUJI, Tomoaki, Toshikazu SHIBUYA, and Takashi KOIZUMI. "An optimum configuration for a stepped bar under torsion." Transactions of the Japan Society of Mechanical Engineers Series A 52, no. 480 (1986): 2017–25. http://dx.doi.org/10.1299/kikaia.52.2017.

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USHIYAMA, Izumi, Hiroshi NAGAI, and Jinkichi SHINODA. "Experimentally determining the optimum design configuration for savonius rotors." Transactions of the Japan Society of Mechanical Engineers Series B 52, no. 480 (1986): 2973–82. http://dx.doi.org/10.1299/kikaib.52.2973.

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Melfi, M. J. "Optimum pole configuration of variable speed AC induction motors." IEEE Industry Applications Magazine 3, no. 6 (1997): 15–20. http://dx.doi.org/10.1109/2943.628109.

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Ghoneim, Nadia S. A., and S. C. Wirasinghe. "Optimum Zone Configuration for Planned Urban Commuter Rail Lines." Transportation Science 21, no. 2 (1987): 106–14. http://dx.doi.org/10.1287/trsc.21.2.106.

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Mazur, M. M., L. I. Mazur, and V. E. Pozhar. "Optimum Configuration for Acousto-optical Modulator Made of KGW." Physics Procedia 70 (2015): 741–44. http://dx.doi.org/10.1016/j.phpro.2015.08.119.

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Yeh, R. H., and S. P. Liaw. "Optimum configuration of a fin for boiling heat transfer." Journal of the Franklin Institute 330, no. 1 (1993): 153–63. http://dx.doi.org/10.1016/0016-0032(93)90027-r.

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Adeli, Hojjat, and Nabil S. Mabrouk. "Optimum plastic design of unbraced frames of irregular configuration." International Journal of Solids and Structures 22, no. 10 (1986): 1117–28. http://dx.doi.org/10.1016/0020-7683(86)90021-1.

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HAGIWARA, Ichiro, Kota TAKEDA, and Yang LEI. "2403 Research on Optimum Configuration of Diamond Core Panel." Proceedings of Design & Systems Conference 2007.17 (2007): 223–26. http://dx.doi.org/10.1299/jsmedsd.2007.17.223.

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USHIYAMA, Izumi, Hiroshi NAGAI, and Jinkichi SHINODA. "Experimentally Determining the Optimum Design Configuration for Savonius Rotors." Bulletin of JSME 29, no. 258 (1986): 4130–38. http://dx.doi.org/10.1299/jsme1958.29.4130.

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Gautami, G., and S. Khanam. "Selection of optimum configuration for multiple effect evaporator system." Desalination 288 (March 2012): 16–23. http://dx.doi.org/10.1016/j.desal.2011.12.005.

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Yu, Jianlin, Hua Zhao, and Kangshan Xie. "Analysis of optimum configuration of two-stage thermoelectric modules." Cryogenics 47, no. 2 (2007): 89–93. http://dx.doi.org/10.1016/j.cryogenics.2006.09.010.

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Popa, Razvan, Alexandru Joni, Adrian Ghionea, and Robert Iacob. "Robotic Welding Cells Configuration." Applied Mechanics and Materials 162 (March 2012): 445–54. http://dx.doi.org/10.4028/www.scientific.net/amm.162.445.

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This paper deals with electric arc robotic welding, the main objective being the optimal structure configuration of the flexible Robotic Welding Cells (RWC). To this purpose, the authors propose a new algorithm for the configuration of the cell structure based on a set of optimization criteria. Thus, to determine the optimum RWC structure, the working cycle of the technological welding process and some process parameters influencing the welded ensemble are improved as well.

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