Monthly chlorophyll-a prediction using neuro-genetic algorithm for water quality management in Lakes by Lee, G., Bae, J., Lee, S., Jang, M., Park, H.

“…Double hidden layers showed better performance than a single hidden layer, while a logistic sigmoid function was frequently selected by the genetic algorithm in hidden layers in comparison with linear and hyperbolic tangent function. Practical uses for NGA in proactive water quality management are also discussed in this study.…”

Synthesis and characterizations of phthaloyl chitosan-based polymer electrolytes by Aziz, N.A., Majid, Siti Rohana, Arof, Abdul Kariem

“…Relaxation peaks are observed from dielectric loss and tangent delta variation with frequency at ambient and elevated temperatures in the frequency range investigated for the highest conducting sample. …”

Dielectric tunability of (Ba0.90Ca0.10)(Ti0.75Zr0.25)O-3 ceramics by Chew, Khian Hooi, Chan, H.L.W., Tang, X.G., Wang, J.

“…At room temperature, the high tunability (K=60%), low-loss tangent (approximate to0.003), and large figure of merit (200), clearly indicate that these ceramics are suitable candidates for microwave applications. …”
Get full text

Development Of Magnetorheological Elastomers Based On Natural Rubber And Industrial Waste Nickel Zinc Ferrite by Moksin, Nordalila

“…The dynamic properties were investigated using lost tangent, tan δ. Curing characteristics, thermal stability, morphology characteristics were also evaluated in this work. …”
Get full text

Frequency reconfiguration mechanism of a PIN diode on a reconfigurable antenna for LTE and WLAN applications by Shah, S. M., M. Daud, M. F., Z. Abidin, Z., Seman, F. C., Hamzah, S. A., Katiran, N., Zubir, F.

“…The proposed antenna is fabricated on a FR-4 substrate with a relative dielectric constant, εr of 4.5, thickness, h of 1.6mm and loss tangent, tan δ of 0.019. The fabrication process is carried out at the Advanced Printed Circuit Board (PCB) Design Laboratory in UTHM.…”

Frequency reconfiguration mechanism of a PIN diode on a reconfigurable antenna for LTE and WLAN Applications by Mohd Shah, Shaharil, Daud, M. F. M., Zainal Abidin, Zuhairiah, Che Seman, Fauziahanim, Hamzah, Shipun Anuar, Katiran, Norshidah

“…The proposed antenna is fabricated on a FR-4 substrate with a relative dielectric constant, εr of 4.5, thickness, h of 1.6mm and loss tangent, tan δ of 0.019. The fabrication process is carried out at the Advanced Printed Circuit Board (PCB) Design Laboratory in UTHM.…”

A compact triple-notch band ultra-wideband antenna by Abdul Rashid, Munirah Az Zahra, Mohd Shah, Shaharil, Ponniran, Asmarashid

“…The proposed antennas are simulated and designed in CST Microwave Studio® software and fabricated on a FR-4 substrate with a relative dielectric constant, εr of 4.5, loss tangent, tan δ of 0.019 and thickness, h of 1.6 mm.…”
Get full text

Multifunctional optimized group method data handling for software effort estimation by Arbain, Siti Hajar

“…This study aimed to propose a hybrid multifunctional GMDH with Artificial Bee Colony (GMDH-ABC) based on a combination of four individual GMDH models, namely, GMDH-Polynomial, GMDH-Sigmoid, GMDH-Radial Basis Function, and GMDH-Tangent. The best GMDH architecture is determined based on L9 Taguchi orthogonal array. …”
Get full text

Novel Family of Group Chain Acceptance Sampling Plans for Truncated Life Tests Using Minimum Angle Method by Aziz, Nazrina, Zain, Zakiyah

“…This angle is calculated by using the tangent function at different values of p. The major benefits are the ability to fairly protect both producers and consumers and achieving more accurate decision using minimum sample size. …”
Get full text

Effects of micrometre-sized graphite flake to reinforce the performances of poly (lactic acid) thermoplastic biocomposites by Alam, Shamsun, Mina, Md. Forhad, Rahman, M. J., Gafur, Md. Abdul, Maria, K. H., Mieno, T., Alam, A. K. M. Moshiul, Beg, M. D. H.

“…With an increase of filler content, the tensile and flexural strengths decrease, but the Young’s and tangent moduli are observed to increase by 58% and 77%, respectively. …”
Get full text

Identifying and estimating solar cell parameters using an enhanced slime mould algorithm by Logeswaary, Devarajah, Mohd Ashraf, Ahmad, Jui, Julakha Jahan

“…The first modification was an arbitrary average position among the new individual position of slime and the best individual position of the slime mound currently found to resolve the issue of local optimum. Second, the tangent hyperbolical function of the formula p in the original SMA was replaced with an exponential function to create more variations for selecting the updated equation. …”
Get full text
Get full text
Get full text

Integration design of 2.4 ghz microstrip patch with siw antenna structure by Panerselvan, Kamleshvari, Nurul Afifi, Alias, Mohamad Shaiful, Abdul Karim, Ahmad Syahiman, Mohd Shah, Syamimi Mardiah, Shaharum

“…The proposed rectangular microstrip antenna by adding SIW technique is stimulated at 2.4 GHz operating frequency with Teflon dielectric constant 2.1 and loss tangent equal to 0.0002 to analyze the antenna performance. …”
Get full text
Get full text

Factorial analysis on the preparation of barium titanate-epoxy resin composite for antenna substrate by Nur Sofia Idayu, Didik Aprianto, Nurulfadzilah, Hasan, Nurul Izzah Izzaty, Mohd Nadzri, Nur Farhana, Mustafa, Loh, Fui Qi, Ahmad Afif, Mohd Faudzi, Nurhafizah, Abu Talip Yusof, Mohamad Shaiful, Abdul Karim

“…These findings provide valuable insights into the best fabrication conditions for barium titanite-epoxy resin composites, contributing to the development of antenna substrate with a permittivity value of 7.0208 and a loss tangent of 0.0238 that is suitable for high-frequency communication applications.…”
Get full text
Get full text

Design of Minkowski fractal antenna on multilayer LTCC technology / Nur Hidayah Mohd Sukaimi by Mohd Sukaimi, Nur Hidayah

“…In this research project, a multilayer stacked patch antenna with eight layers of substrate with the dielectric constant, er of 5.9 and loss tangent, tan 5 of 0.002 using LTCC substrate is chosen to fulfil the requirements of the antenna. …”
Get full text

High‑isolation array antenna design for 5G mm‑wave MIMO applications by Abbasi, Nisar Ahmed, Virdee, Bal Singh, Din, Iftikhar Ud, Ullah, Sadiq, Althuwayb, Ayman Abdulhadi, Rashid, Nasr, Soruri, Mohammad, See, Chan Hwang, Alibakhshikenari, Mohammad

“…The MIMO antenna is fabricated on a low-loss Rogers-5880 substrate, with a thickness of 0.8 mm, a dielectric constant of 2.2, and a loss tangent of 0.0009, ensuring minimal signal loss and confirming the accuracy of simulation results. …”
Get full text

A new biopolymer substrate-based compact monopole antenna covering RFID, WiMAX, and C/X-band by Islam, M.T., Ahsan, M.R., Ullah, M.H.

“…After successful completion of the numerical simulation, the proposed antenna has been fabricated with its optimum parameters on 1.0 mm thick 24 x 17 mm(2) custom-made biopolymer substrate with relative dielectric constant epsilon(r)=10.0 and loss tangent 0.002. The experimental results obtained from the antenna prototype have been validated with numerical results and they are well matched. …”

A nonstandard optimal control problem arising in an economics application: for royalty payment with piecewise function by Wan Ahmad, Wan Noor Afifah

“…This study presents a continuous approximation of the piecewise constant integrand function by utilizing a hyperbolic tangent (tanh) approach, and solves a case utilizing a C++ shooting algorithm with a Newton iteration to take care of the Two-Point Boundary Value Problem (TPBVP). …”
Get full text
Get full text
Get full text

Design of triple band microstrip patch antenna for multipurpose application by Nur Ali, Omar

“…The antenna was constructed on FR 4 substrate of (Ɛr=4.3) with a loss tangent of 0.035. The overall dimensions of the antenna are 29 × 38 × 1.6 mm. …”
Get full text
Get full text
Get full text

Application of epoxy-barium titanate dielectric composite material towards coaxial antenna by Nurfarhana, Mustafa, Azahani Natasha, Azman, Ahmad Syahiman, Mohd Shah, Ahmad Afif, Mohd Faudzi, Mohamad Shaiful, Abdul Karim

“…The permittivity of developed composite material based on epoxy resin and barium titanate is 6.8 while the loss tangent is 0.04 which is suitable to be used as insulator in the coaxial structure. …”
Get full text
Get full text

Application of epoxy-barium titanate dielectric composite material towards coaxial antenna design for liver cancer treatment by Nurfarhana, Mustafa, Azahani Natasha, Azman, Ahmad Syahiman, Mohd Shah, Ahmad Afif, Mohd Faudzi, Mohamad Shaiful, Abdul Karim

“…The permittivity of developed composite material based on epoxy resin and barium titanate is 6.8 while the loss tangent is 0.04 which is suitable to be used as insulator in the coaxial structure. …”
Get full text
Get full text