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Journal articles on the topic 'Ground-Return Parameters'

Author: Grafiati

Published: 5 June 2025

Last updated: 2 August 2025

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1

E., A. Saafan. "Investigating the Impact of Ground-Return Parameters on Transitional Voltages at Switching-Off Unloaded Power Transmission Lines." Engineering and Technology Journal 9, no. 08 (2024): 4724–34. https://doi.org/10.5281/zenodo.13269398.

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The electrical parameters calculations of the overhead transmission lines are very important to the areas concerned to electromagnetic compatibility and transitional processes in power systems. Therefore, accurate calculations of these parameters were performed in this research, taking into account the ground-return parameters (Carson correction factors). The return parameters of the homogenous ground (one-layered ground) the overhead transmission line passes over were taken into consideration via using the actual value of the ground resistivity. In this research, the effect of ground-return p

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2

Li, Zhen, Jinliang He, Bo Zhang, and Zhanqing Yu. "Influence of frequency characteristics of soil parameters on ground-return transmission line parameters." Electric Power Systems Research 139 (October 2016): 127–32. http://dx.doi.org/10.1016/j.epsr.2015.07.020.

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3

Machado, M. V. M., J. A. Brandao Faria, and J. F. Borges da Silva. "Ground return effect on wave propagation parameters of overhead power cables." IEEE Transactions on Power Delivery 5, no. 2 (1990): 825–32. http://dx.doi.org/10.1109/61.53089.

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4

A., I. A. Rahman, A. Bahari M., A. Baharudin Z., A. Zulkefle A., Zainon M., and A. M. Hanafiah M. "Sub Microsecond Analysis of Negative Cloud-to-Ground Lightning Flashes." Indonesian Journal of Electrical Engineering and Computer Science 11, no. 2 (2018): 711–17. https://doi.org/10.11591/ijeecs.v11.i2.pp711-717.

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This paper expounds a software development for the identification of lightning discharged in cloud-to-ground flashes. The study was to reduce a misleading detection of the electric field radiation of lightning discharged profile by considering the important parameters of sub microseconds structure of lightning`s first return stroke. The software built in MATLAB. The software development considered the important parameters of the first return strokes such as peak value, zero crossing, rising time and fast transition time. This study used a modelling technique for training and patterning 19 retu

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5

Liu, Jiajia, Jianliang Gao, Ming Yang, Dan Wang, and Liang Wang. "Numerical Simulation of Parameters Optimization for Goaf Gas Boreholes." Advances in Civil Engineering 2019 (January 10, 2019): 1–13. http://dx.doi.org/10.1155/2019/3891080.

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In view of the ground drilling of the N2206 working face in Shanxi Wangzhuang Coal Mine, the gas concentration is low and the extraction effect is not good. Fluent computational fluid dynamics software was used to simulate the ground extraction drilling position of the N2206 working face in the goaf (the distance from the top of the coal seam and the distance from the return to the wind). The numerical simulation results show that when the final hole of the ground extraction hole in the goaf is 16 m from the roof of the coal seam and the distance from the return air is 45 m, the extraction eff

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Lima, Antonio C. S., Rodolfo A. R. Moura, Marco Aurélio O. Schroeder, and Maria Teresa Correia de Barros. "Assessment of different formulations for the ground return parameters in modeling overhead lines." Electric Power Systems Research 164 (November 2018): 20–30. http://dx.doi.org/10.1016/j.epsr.2018.07.011.

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7

Garg, Anshuman, and Anjana Goen. "Compact Patch Antenna Parameters Integrating Using Left-Handed Meta Material at 2.41GHz." International Journal of Electrical and Electronics Research 2, no. 3 (2014): 21–24. http://dx.doi.org/10.37391/ijeer.020301.

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This paper propose a new generation of antenna design that applies Meta material properties at the height of 3.2mm above from the ground Plane. Paper also analyzed the performance of Rectangular Micro strip Patch Antenna with and without using the Meta material structure. All antenna parameters such as Return Loss, Gain, Directivity and Band width were measured. The main focus of this paper was to improve Return loss so that Patch antenna used for wide band applications. The additional features were its compact size and used in multiband operation.

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Tselentis, G.-A., and L. Danciu. "Probabilistic seismic hazard assessment in Greece – Part 1: Engineering ground motion parameters." Natural Hazards and Earth System Sciences 10, no. 1 (2010): 25–39. http://dx.doi.org/10.5194/nhess-10-25-2010.

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Abstract. Seismic hazard assessment represents a basic tool for rational planning and designing in seismic prone areas. In the present study, a probabilistic seismic hazard assessment in terms of peak ground acceleration, peak ground velocity, Arias intensity and cumulative absolute velocity computed with a 0.05 g acceleration threshold, has been carried out for Greece. The output of the hazard computation produced probabilistic hazard maps for all the above parameters estimated for a fixed return period of 475 years. From these maps the estimated values are reported for 52 Greek municipalitie

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9

Geis-Schroer, Johanna, Sebastian Hubschneider, Lukas Held, et al. "Modeling of German Low Voltage Cables with Ground Return Path." Energies 14, no. 5 (2021): 1265. http://dx.doi.org/10.3390/en14051265.

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In this contribution, measurement data of phase, neutral, and ground currents from real low voltage (LV) feeders in Germany is presented and analyzed. The data obtained is used to review and evaluate common modeling approaches for LV systems. An alternative modeling approach for detailed cable and ground modeling, which allows for the consideration of typical German LV earthing conditions and asymmetrical cable design, is proposed. Further, analytical calculation methods for model parameters are described and compared to laboratory measurement results of real LV cables. The models are then eva

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10

Dandotiya, Vijay, and Chetan Pathak. "Enhancement in RMPA Parameters by Rhombus Connected With Circle Meta Material Structure Using at 1.9 GHz." International Journal of Electrical and Electronics Research 4, no. 1 (2016): 43–45. http://dx.doi.org/10.37391/ijeer.040110.

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Author proposed a new design of meta-material to provide advancement into the factors of the rectangular microstrip patch antenna (RMPA) “Enhancement in RMPA parameters Rhombus Connected With Circle Meta material structure high using at 1.9GHz” As a rectangular microstrip patch antenna is designed at a height of 1.6mm & Left handed Meta material structure is designed at a height of 3.2mm from the ground plane by using CST-MWS software. The resonance frequency 1.9GHz of the designed antenna is using as a high frequency. This paper mainly worked on return loss. The Return loss of the propose

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11

Koshak, W. J. "Optical Characteristics of OTD Flashes and the Implications for Flash-Type Discrimination." Journal of Atmospheric and Oceanic Technology 27, no. 11 (2010): 1822–38. http://dx.doi.org/10.1175/2010jtecha1405.1.

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Abstract Flashes detected by the Optical Transient Detector (OTD) that occur over the continental United States (CONUS) are intercompared with data from the National Lightning Detection Network (NLDN) in order to partition the OTD flashes into ground and cloud flashes. The entire 5-yr OTD dataset for CONUS is analyzed. The statistical distributions of a variety of optical characteristics are examined, including five flash-level attributes (radiance, area, duration, number of optical groups, and number of optical events), and two group-level attributes [the maximum number of events in a group (

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12

Fitsum, Dawit, Dilip Mali, and Mohammed Ismail. "Bandwidth Enhancement of Rectangular Microstrip Patch Antenna using Defected Ground Structure." Indonesian Journal of Electrical Engineering and Computer Science 3, no. 2 (2016): 428. http://dx.doi.org/10.11591/ijeecs.v3.i2.pp428-434.

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<p>This paper presents the bandwidth enhancement of a Proximity Coupled Feed Rectangular Microstrip Patch Antenna using a new Defected Ground Structure - an ‘inverted SHA’ shaped slot on the ground plane of the proximity coupled feed rectangular Microstrip patch antenna. The parameters such as Bandwidth, Return loss, VSWR and Radiation efficiency are improved in the proposed antenna than simple proximity coupled feed rectangular Microstrip patch antenna without Defected Ground Structure. A comparison is also shown for the proposed Microstrip patch antenna with the antenna structure witho

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Setiawan, Muchammad Rofiq Fajar, and Aryo Baskoro Utomo. "The Effect of Parasitic Rings and Ground Plane on Helix Strip Antenna." IJITEE (International Journal of Information Technology and Electrical Engineering) 4, no. 2 (2020): 47. http://dx.doi.org/10.22146/ijitee.55807.

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Strip helix antennas offer better performance at wide bandwidth and more compact in size than conventional helix antennas. However, strip helix antennas have a relatively low gain compared to conventional helix antennas. In this paper, a strip helix antenna with 2.4 GHz frequency was designed, simulated, fabricated, and measured. This strip helix antenna was added with several parasitic rings, and its ground plane size was reduced to increase the gain value and its performance. The best simulation results according to the desired parameters were with return loss < -10 dB of -10.366 dB, VSWR

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14

Song, Hao, Hui Zhou, Heng Wang, Yue Ma, Qianyin Zhang, and Song Li. "Retrieval of Tree Height Percentiles over Rugged Mountain Areas via Target Response Waveform of Satellite Lidar." Remote Sensing 16, no. 2 (2024): 425. http://dx.doi.org/10.3390/rs16020425.

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The retrieval of tree height percentiles from satellite lidar waveforms observed over mountainous areas is greatly challenging due to the broadening and overlapping of the ground return and vegetation return. To accurately represent the shape distributions of the vegetation and ground returns, the target response waveform (TRW) is resolved using a Richardson–Lucy deconvolution algorithm with adaptive iteration. Meanwhile, the ground return is identified as the TRW component within a 4.6 m ground signal extent above the end point of the TRW. Based on the cumulative TRW distribution, the height

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15

M Lakshmu Naidu, K Amrutha, U Gnaneswari, Ch Sridevi, G Sahasra, and M Kalyan. "Performance analysis of rectangular microstrip patch antenna with partial ground plane." International Journal of Scholarly Research in Engineering and Technology 2, no. 2 (2023): 019–30. http://dx.doi.org/10.56781/ijsret.2023.2.2.0029.

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This paper addresses the design of a rectangular microstrip patch antenna for wireless communication applications at 3.5 GHz resonant frequency. HFSS V13 software was utilized to develop and simulate the antenna. The FR-4 (flame retardant) substrate material, which has a dielectric constant of 4.4 and a thickness of 1.6 mm, was used to design the antenna. The microstrip antenna has a ground dimension of 53.4182mm*34.822mm and a 50Ω impedance. The drawbacks with this microstrip antenna are high VSWR (voltage standing wave ratio) and the return loss is greater than -10db.There are many ways to g

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16

Burlakoti, Suroj, and Prakash Rai. "Performance Comparison of Swastika and Rectangular Shaped Microstrip Patch Antenna." Kathford Journal of Engineering and Management 1, no. 1 (2018): 11–14. http://dx.doi.org/10.3126/kjem.v1i1.22015.

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In this paper, Microstrip patch antennas with rectangular and swastika shape of patch are designed and its performance parameters are compared with each other. Rectangular and Swastika shaped patch are considered in this paper with common rectangular ground plane. The antenna is simulated at 2.4 GHz using HFSS simulation software. This work mainly includes modification of antenna patch to improve the antenna parameters. The parameters of antenna such as Return loss, VSWR Bandwidth and radiation pattern are compared using simulation. The performance of Swastika shaped antenna was found to be be

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17

Kurtulgu, Zümrüt, and Atınç Pirti. "A new approach for the classification of ground points from airborne LiDAR data in forested areas." Šumarski list 149, no. 1-2 (2025): 45–55. https://doi.org/10.31298/sl.149.1-2.4.

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LiDAR systems are being used increasingly widely and effectively in the field of forestry. They play an important role in many applications such as creating detailed maps of forests, obtaining high-precision elevation data, obtaining information about the height, density and distribution of trees, mapping the topography under the forest in detail, landslide and erosion control, road planning and water management. Underforest topography maps can be created with high precision thanks to LiDAR ground points. In our study, we present a new approach by using LiDAR data to create the physical charac

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18

MARUDDANI, BASO, EFRI SANDI EFRI SANDI, and MUHAMMAD FADHIL NAUFAL SALAM. "Perancangan dan Optimasi Antena Vivaldi pada Sistem Radar Penembus Permukaan (Ground Penetrating Radar)." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 7, no. 1 (2019): 151. http://dx.doi.org/10.26760/elkomika.v7i1.151.

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ABSTRAKAntena Vivaldi merupakan salah satu jenis antena yang diimplementasikan pada radar penembus permukaan (Ground Penetrating Radar, GPR). GPR adalah salah satu metode non-destructive testing yang biasa digunakan untuk mengetahui kondisi beton/jalan raya. Penelitian ini merancang sebuah antena Vivaldi untuk digunakan pada GPR dengan frekuensi kerja 1 GHz – 2 GHz. Metode yang digunakan untuk merancang dan mengoptimasi antena Vivaldi adalah dengan mengubah beberapa parameter untuk mencapai spesifikasi yang diinginkan. Parameter tersebut antara lain lebar antena, panjang antena dan tapered slo

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19

D'Atnore, M., and M. S. Sarto. "A New Formulation of Flossy Ground Return Parameters for Transient Analysis of Multiconductor Dissipative Lines." IEEE Power Engineering Review 17, no. 1 (1997): 54–55. http://dx.doi.org/10.1109/mper.1997.560697.

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20

D'Amore, M., and M. S. Sarto. "A new formulation of lossy ground return parameters for transient analysis of multiconductor dissipative lines." IEEE Transactions on Power Delivery 12, no. 1 (1997): 303–14. http://dx.doi.org/10.1109/61.568254.

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21

Ernst, Michael, Björn Altenburg, and Thomas Schmalz. "Characterizing adaptations of prosthetic feet in the frontal plane." Prosthetics and Orthotics International 44, no. 4 (2020): 225–33. http://dx.doi.org/10.1177/0309364620917838.

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Background: Energy-storage and return feet incorporate various design features including split toes. As a potential improvement, an energy-storage and return foot with a dedicated ankle joint was recently introduced allowing for easily accessible inversion/eversion movement. However, the adaptability of energy-storage and return feet to uneven ground and the effects on biomechanical and clinical parameters have not been investigated in detail. Objectives: To investigate the design-related ability of prosthetic feet to adapt to cross slopes and derive a theoretical model. Study design: Mechanic

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22

Gupta, Vivek, and Sandeep Kumar Agrawal. "Enhancement in RMPA Parameters by Meta Material High Frequency Using at 6.65 GHz." International Journal of Electrical and Electronics Research 2, no. 3 (2014): 25–27. http://dx.doi.org/10.37391/ijeer.020302.

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A Rectangular micro strip patch antenna loaded with “Enhancement in RMPA parameters by Rhombus Cut Shaped Meta material high frequency using at 6.65GHz” As a rectangular microstrip patch antenna is designed at a height of 1.6mm & Left handed Meta material structure is designed at a height of 3.2mm from the ground plane by using CST-MWS software. The resonance frequency 6.65GHz of the designed antenna is using as a high frequency. We knew that frequency is increases as a bandwidth is also increases. Therefore in this paper work used at high frequency. The 10 dB impedance bandwidth of propos

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23

Deepthi, Chamkur V., and R. Byrareddy C. "Heptagonal Shaped UWB Antenna with DGS for Wireless LTE with Enhanced Bandwidth." International Journal of Recent Technology and Engineering (IJRTE) 9, no. 3 (2020): 671–177. https://doi.org/10.35940/ijrte.C4491.099320.

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The paper discusses about the implementation of Heptagonal shaped compact ultra-wideband planar Microstrip patch antenna with and without defected ground plane structure (DGS) with analysis of various parameters like return loss, VSWR bandwidth etc. A substrate made up of dielectric constant FR4 epoxy is utilized and the 2D and 3D radiation pattern are also discussed. DGS has helped to fine tune and increase the bandwidth & its effects have been studied. A volume of 28x32x1.7 (1523.2 mm^3) is occupied by the size of antenna with dielectric constant of εr = 4.4, tanδ= 0.02. In

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24

Vivek, Singh Kushwah *1. "CIRCULAR DEFECTED GROUND MICROSTRIP BAND-REJECT FILTER DESIGN FOR RADAR COMMUNICATION." International Journal of Engineering Technologies and Management Research 5, no. 2 (SE) (2018): 346–54. https://doi.org/10.5281/zenodo.1247515.

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In this paper, a novel narrow band microstrip band-reject filter is designed using three circular shape defected ground structure (DGS). Three circular shape defected ground structure are linked by a path in the ground plane where etching process is applied. The path length of middle DGS cell is 8 mm and the path length of corner DGS cell is 11 mm whereas the path width of all three DGS cell is 0.6 mm and the radius of circular shape defected ground structure is 2.1 mm. The mid-stop band frequency of the designed filter is 1.61 GHz which is applicable for the satellite and radar communication

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25

Shubhi, Jain, K. Khanna R, K. Jain Praveen, Agarwal Ankit, and Rawal Pallav. "Design of EBG Structured Parasitic Patch Antenna for Wireless Communication Applications." European Journal of Advances in Engineering and Technology 5, no. 3 (2018): 207–13. https://doi.org/10.5281/zenodo.10702451.

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<strong>ABSTRACT </strong> In this paper, we have reported the wireless communication application of U shaped antenna with EBG structured ground plane. The proposed antenna was designed on FR4 substrate of 18 x 21 mm<sup>2</sup> dimensions with thickness 1.6 mm. We have systematically designed the antenna starting from U shape patch with partial ground plane. In this structure, very short bandwidth about 2 GHz with resonance frequency at 2.52 GHz was obtained. To improve the parameters of the designed antenna, we have introduced EBG structure (1 x 1 mm<sup>2</sup>) in ground plane. We obtain w

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26

Deif, Ahmed, Adel M. E. Mohamed, Issa El-Hussain, Yousuf Al-Shijbi, Sherif El-Hady, and Zaid Al Habsi. "Site-specific seismic hazard levels at the economic zone of Duqm, Oman." Journal of Geophysics and Engineering 18, no. 5 (2021): 740–60. http://dx.doi.org/10.1093/jge/gxab050.

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Abstract A site-specific probabilistic seismic hazard assessment (PSHA) was achieved in the area of special economic zone authority of Duqm, involving hazard evaluation at the bedrock conditions and assurance of potential site influence on seismic ground motion at the bedrock. Appropriate source and ground-motion prediction models were selected and seismic hazards were identified by means of 5% damped Uniform Hazard Spectra (UHS) for three return periods of 475, 975, and 2475 years. A logic-tree algorithm was used to study the influence of the epistemic uncertainties on the source models, eart

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27

Oyewole, Olayinka J., Christopher Sirola, Anwaoy Pandit, and Samson Ayo. "The Study of Altitudinal Refractivity and Refractivity Gradient Variations by Weather Parameters in Some Selected Locations in Nigeria." Physical Science International Journal 29, no. 3 (2025): 42–49. https://doi.org/10.9734/psij/2025/v29i3882.

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Weather parameters such as pressure, temperature and humidity significantly affect the altitudinal refractivity and refractivity gradients which in return impact the propagation of the radio wave. The alteration in these parameters changes the atmospheric refractive index. Radio refractivity expresses the degree at which a radio signal bends when it travels through the atmosphere. This study examines weather parameters effects on the altitudinal refractivity and refractivity in some selected locations in Nigeria using existing mathematical models relating them with some meteorological paramete

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Edy Purnomo, M. Fauzan, Dwi Fadila Kurniawan, and M. Rizky Guntur Pratama. "Pengaruh Bending Antena Mikrostrip Star-Patch Terhadap Parameter Antena Dengan Orientasi Bending Sumbu X." ALINIER: Journal of Artificial Intelligence & Applications 4, no. 1 (2023): 1–17. http://dx.doi.org/10.36040/alinier.v4i1.6028.

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Microstrip antennas are used in various dimensions and shapes of microstrip antennas according to needs. In this use it allows bending of the microstrip antenna which changes the characteristics or parameters. In this research a microstrip antenna is designed with 24 star and 12 star patches and a staircase-shaped ground plane working at a frequency of 2.4 GHz. Design and simulation were carried out on the CST Studio Suite 2018 software and measurements were carried out with the ARINTS VNA. The simulation results show that bending causes yield degradation in the microstrip antenna parameters w

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29

Hoole, P. R. P., S. Thirukumaran, Harikrishnan Ramiah, Jeevan Kanesan, and S. R. H. Hoole. "Ground to Cloud Lightning Flash Currents and Electric Fields: Interaction with Aircraft and Production of Ionosphere Sprites." Journal of Computational Engineering 2014 (August 3, 2014): 1–5. http://dx.doi.org/10.1155/2014/869452.

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This paper presents for the first time a case for the importance of ground to cloud (upward leader) lightning flash parameters for safety testing of direct aircraft-lightning interaction and protection of wind turbines, as well as the importance of radiated electric fields for indirect lightning-aircraft interaction and generation of electric discharges called sprites and halos in the ionosphere. By using an electric circuit model of the transverse magnetic waves along the return stroke channel, electric currents at ground level as well as cloud level are determined for both the cloud to groun

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30

Ningrum, Rohima Wahyu, Wiwit Suryanto, Hendra Fauzi, and Estuning Tyas Wulan Mei. "Mapping of PGA Value Using PSA Method in West Halmahera Nort Maluku." Jurnal Teknosains 9, no. 2 (2020): 116. http://dx.doi.org/10.22146/teknosains.41483.

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The earthquake that occurred in the West Halmahera region was very detrimental, even though the human casualties were not very significant. But it will affect the stability and capacity of a region in terms of regional development. The mapping of earthquake-prone areas is carried out by a probabilistic seismic hazard analysis (PSHA) method to analyze soil movement parameters, namely Peak Ground Acceleration so that it can determine earthquake-prone areas in West Halmahera. The results of seismic hazard analysis show that the West Halmahera area is an area that is relatively prone to earthquake

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Garg, Bimal, and Dauood Saleem. "Innovative Double H Metamaterial Structure for Amelioration in Patch Antenna Parameters." Bulletin of Electrical Engineering and Informatics 2, no. 4 (2013): 278–85. http://dx.doi.org/10.11591/eei.v2i4.194.

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A rectangular microstrip patch antenna along with a SSRR based “Double H” shaped metamaterial is proposed and analyzed at a height of 3.2mm from the ground plane. This work is mainly focused on increasing the potential parameters of microstrip patch antennas. The patch antenna along with the proposed metamaterial structure is designed to resonate at 1.84GHz. The impedance bandwidth of the patch antenna along with the proposed metamaterial structure is improved by 12.9MHz and return loss is reduced by 9.89dB. All the simulation work is done by using CST-MWS Software. Double-Negative properties

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Chawawisuttikool, Jitapa, Chatchai Phirawatthakul, Warintun Thomchaita, Chatchai Tieachanpan, and Orawan Prasartwuth. "Reliability of running parameters using fitness watches synced with accelerometers during outdoor runs." Journal of Associated Medical Sciences 57, no. 1 (2024): 170–76. http://dx.doi.org/10.12982/jams.2024.019.

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Background: To prevent running related injuries and return to sport activities, monitoring the running dynamic parameters (cadence, stride length, ground contact time and vertical oscillation) especially outdoor running is crucial. Previous studies investigated the reliability of these parameters in laboratory settings. However, the nature of outdoor runs is different (curve, uphill, other runners, etc.) and challenging in terms of equipment (simple) and environments (grass, asphalt, rubber, etc.). Therefore, the reliability of these parameters using a fitness watch synced with accelerometer n

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Banitsiotou, I. D., T. M. Tsapanos, V. N. Margaris, and P. M. Hatzidimitriou. "Estimation of the seismic hazard parameters for various sites in Greece using a probabilistic approach." Natural Hazards and Earth System Sciences 4, no. 3 (2004): 399–405. http://dx.doi.org/10.5194/nhess-4-399-2004.

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Abstract. The probabilistic approach that was recently introduced by Kijko and Graham (1998,1999) was applied for the estimation of seismic hazard for various sites in Greece in terms of peak ground acceleration (PGA) and peak ground velocity (PGV). These sites represent geographically cities of Greece among which are the capital of Greece and some others with high, intermediate and low seismicity. The approach allows the use of earthquake catalogues with incomplete reported historical and complete instrumental data, the consideration of different magnitude thresholds, and the incorporation of

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Harith, Noor Sheena Herayani, Felix Tongkul, and Azlan Adnan. "Seismic Hazard Curve as Dynamic Parameters in Earthquake Building Design for Sabah, Malaysia." Buildings 13, no. 2 (2023): 318. http://dx.doi.org/10.3390/buildings13020318.

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This paper presents the significance of a seismic hazard curve plot as a dynamic parameter in estimating earthquake-resistant structures. Various cases of structural damages in Malaysia are due to underestimating earthquake loadings since mostly buildings were designed without seismic loads. Sabah is classified as having low to moderate seismic activity due to a few active fault lines. Background point, area, and line sources are the three tectonic features that have impacted Sabah. Data on earthquakes from 1900 to 2021 have been collected by a number of earthquake data centers. The seismicity

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Khinda, Jaspal Singh, Malay Ranjan Tripathy, and Deepak Gambhir. "Multi-Edged Wide-Band Rectangular Microstrip Fractal Antenna Array for C- and X-Band Wireless Applications." Journal of Circuits, Systems and Computers 26, no. 04 (2016): 1750068. http://dx.doi.org/10.1142/s0218126617500682.

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A low-cost multi-edged rectangular microstrip fractal antenna (RMFA) yielding a huge bandwidth of 8.62[Formula: see text]GHz has been proposed in this paper. The proposed fractal antenna design constitutes a radiation patch, fed with 50[Formula: see text][Formula: see text] microstrip line and a partial ground plane. The partial ground plane is the combination of shapes of rectangle and three-point arc. The proposed antenna is simulated as well as fabricated. The simulated results using electromagnetic solver software and measured with vector network analyzer bench MS46322A are presented and c

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Damur, D., T. Guerrero, M. Haessig, P. Montavon, and K. Voss. "Force plate gait analysis to assess limb function after tibial tuberosity advancement in dogs with cranial cruciate ligament disease." Veterinary and Comparative Orthopaedics and Traumatology 21, no. 03 (2008): 243–49. http://dx.doi.org/10.1055/s-0037-1617368.

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Summary Objective: To assess functional outcome in dogs with cranial cruciate ligament (CrCL) disease after tibial tuberosity advancement (TTA) using force plate gait analysis, and to evaluate parameters potentially influencing outcome. Study design: Prospective clinical study. Animals: Consecutive clinical patients (n=37) with CrCL-deficient stifles (n=40). Methods: The stifle joints were examined arthroscopically prior to TTA. Meniscal release was not performed if the medial meniscus was intact. Open medial arthrotomy and partial meniscectomy were performed in the presence of meniscal tears.

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Gupta, Vivek, and Sandeep Agrawal. "Return loss & Gain Enhancement in RMPA by Rectangle cut Shaped Meta Material Structure Using at 2.097GHz." International Journal of Electrical and Electronics Research 2, no. 3 (2014): 32–35. http://dx.doi.org/10.37391/ijeer.020304.

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In This work, Rectangular Micro strip Patch Antenna (RMPA) along with meta material which has design of “Rectangle Cut Shaped’’ structure is proposed at height of 3.2 mm from the ground plane. The RMPA with proposed Meta material structure is designed to resonate at 2.097 GHz frequency. This work is mainly focused on increasing the potential parameters of micro strip patch antenna. Proposed Meta material structure is significantly reduced the return loss and increased the bandwidth and gain of the antenna with compare to RMPA alone. The gain is increased up to 3.242 in comparison to RMPA alone

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Choudhury, Sachidananda, Veeranki Kalyani, R. Sai Teja, P. Sreenivasan, Sarat K. Kotamraju, and K. Ch. Sri Kavya. "A comparative analysis of rectangular cut edge patch antenna on various substrate." International Journal of Engineering & Technology 7, no. 1.1 (2017): 518. http://dx.doi.org/10.14419/ijet.v7i1.1.10159.

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An analysis of simple microstrip patch antenna has been designed which comprises of various dielectric substrates that is placed in between metallic patch and ground. Substrates used in this design Epoxy (FR4), Rogers duroid 6002 (tm) with various relative permittivity 2.94 and 2.2 and thickness of 3.2mm. Some applications for the designed frequency are wireless fidelity, WLAN application, Bluetooth. The proposed antenna is designed in HFSSV15 Software operating at 2.4 GHz frequency which renders return loss not more than -10dB. The purpose of this paper was analyzation and simulation for the

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Margitová, Anastázia, Michal Kolcun, and Martin Kanálik. "Impact of the Ground on the Series Impedance of Overhead Power Lines." TRANSACTIONS ON ELECTRICAL ENGINEERING 7, no. 3 (2020): 47–54. http://dx.doi.org/10.14311/tee.2018.3.047.

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An overhead power line is a structure used in the electric power system to transmit electrical energy. The performance of overhead power lines depends on their parameters. There are four basic electrical parameters of power lines: resistance, inductance, capacitance, and shut conductance. The paper focuses on the calculation of the series impedance of overhead lines (resistance and inductance) by three different methods (Carsonʹs method, Rüdenbergʹs method and the theory of complex penetration depth) considering the impact of the ground return path. There is also the comparison of these method

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Montagud, C., J. Corberan, A. Montero, and J. Urchueguía. "Analysis of the energy performance of a ground source heat pump system after five years of operation." Energy and Buildings 43, no. 12 (2011): 3618–26. https://doi.org/10.1016/j.enbuild.2011.09.036.

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GeoCool plant was the result of a EU project whose main purpose was to adapt ground coupled heat pump technology to cooling dominated areas. The execution of this experimental plant was completed at the end of year 2004, starting on February 2005 the regular operation of the air conditioning system. Since then, GeoCool facility has been monitored by a network of sensors characterizing its most relevant parameters. Several aspects of the performance and behaviour of the system during its first operational year were presented on a previous paper. This paper presents the energy performance measur

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Arsyad, Ardy, Akhmad Bakri Muhiddin, and Farouk Maricar. "Deterministic and probabilistic Seismic Hazard Assessments for Merangin Kerinci Sumatera." IOP Conference Series: Earth and Environmental Science 1117, no. 1 (2022): 012018. http://dx.doi.org/10.1088/1755-1315/1117/1/012018.

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Abstract This paper presents calculated ground motions for Merangin Kerinci in the Provinsi of Jambi Sumatera. The ground motions were calculated using a probabilistic seismic hazard analysis. The earthquake catalogue used in the analysis included all recorded earthquakes up to the end of July 2019, trimmed for magnitude completeness. Uncertainty in input parameters was considered using a logic tree, with branches including shallow crustal faults of the Great Sumatran Faults and Sumatera Megathrust Subduction. Ground motions are presented for the local site conditions, measured at those sites

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Mahmood, Khalid, Naveed Ahmad, Usman Khan, and Qaiser Iqbal. "Seismic hazard maps of Peshawar District for various return periods." Natural Hazards and Earth System Sciences 20, no. 6 (2020): 1639–61. http://dx.doi.org/10.5194/nhess-20-1639-2020.

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Abstract. Probabilistic seismic hazard analysis of Peshawar District has been performed for a grid size of 0.01∘. The seismic sources for the target location are defined as the area polygon with uniform seismicity. The earthquake catalogue was developed based on the earthquake data obtained from different worldwide seismological networks and historical records. The earthquake events obtained at different magnitude scales were converted into moment magnitude using indigenous catalogue-specific regression relationships. The homogenized catalogue was subdivided into shallow crustal and deep-subdu

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Işık, Ercan, Aydın Büyüksaraç, Yunus Levent Ekinci, Mehmet Cihan Aydın, and Ehsan Harirchian. "The Effect of Site-Specific Design Spectrum on Earthquake-Building Parameters: A Case Study from the Marmara Region (NW Turkey)." Applied Sciences 10, no. 20 (2020): 7247. http://dx.doi.org/10.3390/app10207247.

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The Marmara Region (NW Turkey) has experienced significant earthquakes (M > 7.0) to date. A destructive earthquake is also expected in the region. To determine the effect of the specific design spectrum, eleven provinces located in the region were chosen according to the Turkey Earthquake Building Code updated in 2019. Additionally, the differences between the previous and updated regulations of the country were investigated. Peak Ground Acceleration (PGA) and Peak Ground Velocity (PGV) were obtained for each province by using earthquake ground motion levels with 2%, 10%, 50%, and 68% proba

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Jaffar, Muhammad Ismail, Hazrul Abdul Hamid, Riduan Yunus, and Ahmad Fauzi Raffee. "Fitting Statistical Distribution Functions of Air Pollutant Concentration in Different Urban Locations in Malaysia." Journal of Engineering and Science Research 7, no. 2 (2023): 7–11. http://dx.doi.org/10.26666/rmp.jesr.2023.2.2.

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Ground level ozone is an unstable substance in the atmosphere which reacts with nitrogen dioxide (NOx) in the presence of sunlight normally found near ground level. Ground level ozone is known as one of the major air quality issues worldwide. The presence of the NOx volatile organic compounds (VOCs) can influence the concentration levels of ground level ozone. This pollutant can affect crops and human health. The main aim of this research is to find the best fit distribution for urban monitoring stations in Kuala Terengganu, Kota Bharu and Alor Setar. Secondary data from 2011 to 2015 used in t

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Sarade, S., and S. R. Ruikar. "Development of a Wide Bandwidth Massive Eight Dissimilar Radiating Element Multiband MIMO Antenna for mm-Wave Application." Engineering, Technology & Applied Science Research 12, no. 5 (2022): 9166–71. http://dx.doi.org/10.48084/etasr.5133.

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This paper proposes a massive MIMO antenna operating on 6GHz frequency as millimeter-wave. It consists of eight dissimilar-shaped radiating elements. The radiating element of the antenna is designed using square shape with different cut slots. Parasitic elements and defected ground structure are introduced for the enhancement of the correlation coefficients and total active reflection coefficients of the MIMO antenna. The rectangular shape parasitic elements are placed between the square radiating patches. The ground plane consists of rectangular shape defected ground structures. The antenna i

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Wooi, Chin-Leong, Zulkurnain Abdul-Malek, Behnam Salimi, Noor Azlinda Ahmad, Kamyar Mehranzamir, and Saeed Vahabi-Mashak. "A Comparative Study on the Positive Lightning Return Stroke Electric Fields in Different Meteorological Conditions." Advances in Meteorology 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/307424.

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Positive cloud-ground lightning is considerably more complex and less studied compared to the negative lightning. This paper aims to measure and characterize the significant parameters of positive return strokes electric field, namely, the zero-to-peak rise time, 10–90% rise time, slow front duration, fast transition rise time (10–90%), zero-crossing time, and opposite polarity overshoot relative to peak. To the best of the authors’ knowledge, this is the first time such detailed characteristics of positive lightning in Malaysia are thoroughly analyzed. A total of 41 positive lightning flashes

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Sinclair, J., C. Franks, J. F. Goodwin, R. Naemi, and N. Chockalingam. "Influence of footwear designed to boost energy return on the kinetics and kinematics of running compared to conventional running shoes." Comparative Exercise Physiology 10, no. 3 (2014): 199–206. http://dx.doi.org/10.3920/cep140010.

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Runners have sought to utilise athletic footwear as one of the mechanisms by which they might attenuate their risk of injury and improve their performance. New commercially available footwear which claims to boost energy return have been designed utilising an expanded thermoplastic polyurethane midsole. These footwear have been shown to improve running economy, but their clinical efficacy has not yet been established. This study aimed to examine the 3-D kinetics and kinematics when running in footwear that claims to promote energy return in relation to conventional running trainers. Fifteen ma

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Teo, Tee-Ann, and Wan-Yi Yeh. "The Benefit of the Geospatial-Related Waveforms Analysis to Extract Weak Laser Pulses." Remote Sensing 10, no. 7 (2018): 1141. http://dx.doi.org/10.3390/rs10071141.

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Waveform lidar provides both geometric and waveform properties from the entire returned signals. The waveform analysis is an important process to extract the attributes of the reflecting surface from the waveform. The proposed method analyzes the geospatial relationship between the return signals by combining the sequential waves. The idea of this method is to analyze the waveform parameters from sequential waves. Since the adjacent return signals are geospatially correlated, they have similar waveform properties that can be used to validate the correctness of the extracted waveform parameters

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Salman, Maaz, Youna Jang, Jongsik Lim, Dal Ahn, and Sang-Min Han. "Novel Wilkinson Power Divider with an Isolation Resistor on a Defected Ground Structure with Improved Isolation." Applied Sciences 11, no. 9 (2021): 4148. http://dx.doi.org/10.3390/app11094148.

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A modified Wilkinson Power Divider is proposed in this paper that utilizes defected ground structure (DGS) in parallel with an isolation resistor. The proposed DGS section is incorporated between the output ports, and the isolation resistor is soldered in parallel with the DGS in the ground plane, instead of on the top plane as in a conventional Wilkinson power divider, to achieve improved or preferable isolation. The proposed design is comprised of two pairs of microstrip transmission lines with equal impedances and varied electrical lengths. The parameters of the main circuit and the DGS sec

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Tingsanchali, Tawatchai, and Thanasit Promping. "Comprehensive Assessment of Flood Hazard, Vulnerability, and Flood Risk at the Household Level in a Municipality Area: A Case Study of Nan Province, Thailand." Water 14, no. 2 (2022): 161. http://dx.doi.org/10.3390/w14020161.

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Estimating flood hazard, vulnerability, and flood risk at the household level in the past did not fully consider all relevant parameters. The main objective of this study is to improve this drawback by developing a new comprehensive and systematic methodology considering all relevant parameters and their weighting factors. This new methodology is applied to a case study of flood inundation in a municipal area of Nan City in the Upper Nan River Basin in Thailand. Field and questionnaire surveys were carried out to collect pertinent data for input into the new methodology for estimating flood ha

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