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Article ; Online: Design of adaptive hybrid MPPT controllers with universal input voltage DC-DC converter for RES's.

Rafikiran, Shaik / Alsaif, Faisal

2024 Volume 14, Issue 1, Page(s) 11379

Abstract: At present, conventional energy production is absent because of the more hazardous gases released into the environment, the high effect on human health, more cost required for maintenance, plus less usefulness for highly populated areas. So, the ... ...

Abstract	At present, conventional energy production is absent because of the more hazardous gases released into the environment, the high effect on human health, more cost required for maintenance, plus less usefulness for highly populated areas. So, the Renewable Energy Sources are more focused for the present automotive industry application. In this work, the Proton Exchange Membrane Fuel Stack is considered for analyzing the proposed DC-DC converter circuit. The advantages of this fuel stack are high energy density, fast functioning nature, more robustness, and more usefulness for the various water membrane conditions of the fuel stack. However, the disadvantages of the fuel stack are excessive current generation, plus more current conduction losses. So, the wide voltage supply single switch power converter is introduced in this work for optimizing the current production of the fuel stack network. The merits of this converter circuit are high stability, good reliability, low voltage appearing across the switches, plus a uniform power supply. Here, the converter switching pulses are obtained by proposing the Modified Continuous Step Change Adaptive Fuzzy Logic with Grey Wolf Optimization hybrid controller. This controller provides high maximum power extraction efficiency from the fuel stack which is equal to 99.421%. Also, this controller's Maximum Power Point Tracking time is 0.0285 s.
Language	English
Publishing date	2024-05-18
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-62208-7
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Design and analysis of solitary AC-AC converter using reduced components for efficient power generation system.

Nandakumar, K / Mohan, V / Alsaif, Faisal / Senthilkumar, S

Scientific reports

2024 Volume 14, Issue 1, Page(s) 9323

Abstract: Considering different applications that require varied power and voltage conversion levels between AC grids and AC loads, AC-AC power conversion between AC grids has become an inevitable technology of energy management systems. An isolated converter for ... ...

Abstract	Considering different applications that require varied power and voltage conversion levels between AC grids and AC loads, AC-AC power conversion between AC grids has become an inevitable technology of energy management systems. An isolated converter for performing AC-to-AC transmission is proposed with minimal components for reduced losses and enhanced system efficiency. Single-phase direct buck-boost AC to AC converter with minimum components constituted with two dual IGBT control units (IGBT 1-IGBT 4), inductor (L
Language	English
Publishing date	2024-04-23
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-60230-3
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Article ; Online: Author Correction: Design and analysis of solitary AC-AC converter using reduced components for efficient power generation system.

Nandakumar, K / Mohan, V / Alsaif, Faisal / Senthilkumar, S

Scientific reports

2024 Volume 14, Issue 1, Page(s) 10233

Language	English
Publishing date	2024-05-03
Publishing country	England
Document type	Published Erratum
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-61208-x
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Article ; Online: Performance optimization of interleaved boost converter with ANN supported adaptable stepped-scaled P&O based MPPT for solar powered applications.

Krishnaram, K / Padmanabhan, T Suresh / Alsaif, Faisal / Senthilkumar, S

Scientific reports

2024 Volume 14, Issue 1, Page(s) 8115

Abstract: Solar energy is the most promising among many renewable energy sources to meet the increasing demand. Photovoltaic (PV) based power generating solutions are expected to gain popularity as a power source for different applications, including independent ... ...

Abstract	Solar energy is the most promising among many renewable energy sources to meet the increasing demand. Photovoltaic (PV) based power generating solutions are expected to gain popularity as a power source for different applications, including independent and grid connected loads, due to their cleanliness, high performance, and high dependability. The efficacy of photovoltaic systems is impacted by several elements, including geographical location, positioning, shadowing effects, and local climate conditions. In order to fulfil the demands of loads, an interleaved boost converter is utilized, which has a reduced number of filters with less stress on the devices. Solar powered systems employ several maximum power point tracking (MPPT) methodologies. However, when there is partial shading, many power peaks arise, which complicates the identification of the overall peak. Although MPPT approaches are designed to measure and maintain the global maximum power point (GMPP), there are still significant oscillations observed around the GMPP with subpar settling time, tracking efficiency, and conversion efficiency. In this work, novel hybrid MPPT technique called artificial neural network supported adaptable stepped-scaled perturb and observe (ANN-ASSPO) method and water cycle optimization based perturb and observe (WCO-PO) have been proposed. Artificial neural network (ANN) has been used to determine the best scaling factor in ANN-ASSPO MPPT. Performance is enhanced in ANN-ASSPO MPPT by using the optimum scaling factor, particularly in situations when the irradiance is rapidly changing/partial shading conditions. Similarly, in WCO-PO MPPT water cycle optimization is used to determine the peak power when the PV panel is subjected to partial shading conditions. The performances of proposed hybrid MPPT ANN-ASSPO and WCO-PO techniques have been compared in terms of power generated, output voltage, average settling time and conversion efficiency. The MATLAB/Simulink tool is employed to carry out the experiment for this study.
Language	English
Publishing date	2024-04-06
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-58852-8
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Article ; Online: Development of grey wolf optimization based modified fast terminal sliding mode controller for three phase interleaved boost converter fed PV system.

Krishnaram, K / Suresh Padmanabhan, T / Alsaif, Faisal / Senthilkumar, S

Scientific reports

2024 Volume 14, Issue 1, Page(s) 9256

Abstract: The conventional MPPT method has drawbacks, such as that under partial shading conditions, several peaks occur and identifying the global peak is difficult. It may converge to a local peak and lead to poor conversion efficiency and tracking efficiency. ... ...

Abstract	The conventional MPPT method has drawbacks, such as that under partial shading conditions, several peaks occur and identifying the global peak is difficult. It may converge to a local peak and lead to poor conversion efficiency and tracking efficiency. Implementation of a hybrid algorithm by integrating P&O and metaheuristic algorithms can perform better under partial shading conditions. But the tracking speed is low and the response time is longer. To mitigate the issues mentioned above, a new hybrid algorithm has been suggested that integrates GWO and a modified fast terminal sliding mode controller (MFTSMC). The suggested method with three phase ILBC is incorporated into the PV system. The MATLAB tool is employed to experiment with this study. The performance of GWO-MFTSMC is analysed through MATLAB/ SIMULINK and compared with the performance of ANN-FTSMC and PSO-FTSMC algorithm based MPPT techniques. A hardware prototype is developed and tested for 5 × 200 W solar PV modules with the GWO-MFTSMC algorithm. The proposed method conversion efficiency is 99.72% and 96.15% under simulation and hardware realisation, respectively, which is higher than the ANN-FTSMC and PSO-FTSMC methods.
Language	English
Publishing date	2024-04-22
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-59900-z
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Article ; Online: Development of multiple input supply based modified SEPIC DC-DC converter for efficient management of DC microgrid.

Reddy, B Nagi / Alsaif, Faisal / Reddy, Ch Rami / Sunil Kumar, Sunkara

Scientific reports

2024 Volume 14, Issue 1, Page(s) 11066

Abstract: The development of DC microgrids is reliant on multi-input converters, which offer several advantages, including enhanced DC power generation and consumption efficiency, simplified quality, and stability. This paper describes the development of a ... ...

Abstract	The development of DC microgrids is reliant on multi-input converters, which offer several advantages, including enhanced DC power generation and consumption efficiency, simplified quality, and stability. This paper describes the development of a multiple input supply based modified SEPIC DC-DC Converter for efficient management of DC microgrid that is powered by two DC sources. Here Multi-Input SEPIC converter offers both versatility in handling output voltage ranges and efficiency in power flow, even under challenging operating conditions like lower duty cycle values. These features contribute to the converter's effectiveness in managing power within a DC microgrid. In this configuration, the DC sources can supply energy to the load together or separately, depending on how the power switches operate. The detailed working states with equivalent circuit diagrams and theoretical waveforms, under steady-state conditions, are shown along with the current direction equations. This paper also demonstrates the typical analysis of large-signal, small-signal, steady-state modeling techniques and detailed design equations. The proposed configuration is validated through the conceptual examination using theoretical and comprehensive MATLAB simulation results. Detailed performance analysis has been done for different cases with various duty ratios. Finally, to show the competitiveness, the multi-input SEPIC topology is compared with similar recent converters.
Language	English
Publishing date	2024-05-14
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-61713-z
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Article ; Online: Management of Delayed Eruption in Permanent Incisor Following Intrusion Injury of Primary Dentition

Alfarraj JH / Alsaif F / Alsaad SA

International Medical Case Reports Journal, Vol Volume 15, Pp 463-

A Case Report

2022 Volume 467

Abstract: Jawza H Alfarraj,1 Faisal Alsaif,2 Sama A Alsaad3 1Pediatric Dentistry Department, King Fahad Medical City, Riyadh, Saudi Arabia; 2General Dentist, Private Practice, Riyadh, Saudi Arabia; 3Pediatric Dentistry Department, King Saud Medical City, Riyadh, ... ...

Abstract	Jawza H Alfarraj,1 Faisal Alsaif,2 Sama A Alsaad3 1Pediatric Dentistry Department, King Fahad Medical City, Riyadh, Saudi Arabia; 2General Dentist, Private Practice, Riyadh, Saudi Arabia; 3Pediatric Dentistry Department, King Saud Medical City, Riyadh, Saudi ArabiaCorrespondence: Jawza H Alfarraj, Tel +966509948859, Email Jalfarraj@kfmc.med.saAbstract: This article describes the clinical management of delayed eruption of the upper left permanent central incisor of an eight-year-old child with a history of overlooked intrusive trauma to the primary maxillary incisors. Initial conservative management involved simple extraction of the over-retained upper right primary left incisor. At the recall visit, the decision was made to expose permanent incisors surgically aiming to facilitate its eruption. Two years later, the upper right central and lateral incisors have been erupted into the oral cavity, improving patient aesthetics. This case report aims to demonstrate the clinical diagnosis and intervention for delayed eruption of maxillary permanent central incisor as a consequence of an overlooked intrusive trauma in the primary dentition. Additionally, to emphasize the importance of periodic radiographic examination in monitoring the sequence of eruption in mixed dentition.Keywords: dental trauma, unerupted, delayed eruption, pediatric
Keywords	dental trauma ; unerupted ; delayed eruption ; pediatric ; Medicine (General) ; R5-920
Subject code	941
Language	English
Publishing date	2022-08-01T00:00:00Z
Publisher	Dove Medical Press
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Management of Delayed Eruption in Permanent Incisor Following Intrusion Injury of Primary Dentition: A Case Report.

Alfarraj, Jawza H / Alsaif, Faisal / Alsaad, Sama A

International medical case reports journal

2022 Volume 15, Page(s) 463–467

Abstract: This article describes the clinical management of delayed eruption of the upper left permanent central incisor of an eight-year-old child with a history of overlooked intrusive trauma to the primary maxillary incisors. Initial conservative management ... ...

Abstract	This article describes the clinical management of delayed eruption of the upper left permanent central incisor of an eight-year-old child with a history of overlooked intrusive trauma to the primary maxillary incisors. Initial conservative management involved simple extraction of the over-retained upper right primary left incisor. At the recall visit, the decision was made to expose permanent incisors surgically aiming to facilitate its eruption. Two years later, the upper right central and lateral incisors have been erupted into the oral cavity, improving patient aesthetics. This case report aims to demonstrate the clinical diagnosis and intervention for delayed eruption of maxillary permanent central incisor as a consequence of an overlooked intrusive trauma in the primary dentition. Additionally, to emphasize the importance of periodic radiographic examination in monitoring the sequence of eruption in mixed dentition.
Language	English
Publishing date	2022-08-31
Publishing country	New Zealand
Document type	Case Reports
ZDB-ID	2495077-4
ISSN	1179-142X
ISSN	1179-142X
DOI	10.2147/IMCRJ.S380096
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Article ; Online: Hybrid multimodule DC-DC converters accelerated by wide bandgap devices for electric vehicle systems.

Waheed, Abdul / Rehman, Saif Ur / Alsaif, Faisal / Rauf, Shoaib / Hossain, Ismail / Pushkarna, Mukesh / Gebru, Fsaha Mebrahtu

Scientific reports

2024 Volume 14, Issue 1, Page(s) 4746

Abstract: In response to the growing demand for fast-charging electric vehicles (EVs), this study presents a novel hybrid multimodule DC-DC converter based on the dual-active bridge (DAB) topology. The converter comprises eight modules divided into two groups: ... ...

Abstract	In response to the growing demand for fast-charging electric vehicles (EVs), this study presents a novel hybrid multimodule DC-DC converter based on the dual-active bridge (DAB) topology. The converter comprises eight modules divided into two groups: four Insulated-Gate Bipolar Transistor (IGBT) modules and four Metal-Semiconductor Field-Effect Transistor (MESFET) modules. The former handles high power with a low switching frequency, while the latter caters to lower power with a high switching frequency. This configuration leverages the strengths of both types of semiconductors, enhancing the converter's power efficiency and density. To investigate the converter's performance, a small-signal model is developed, alongside a control strategy to ensure uniform power sharing among the modules. The model is evaluated through simulation using MATLAB, which confirms the uniformity of the charging current provided to EV batteries. The results show an impressive power efficiency of 99.25% and a power density of 10.99 kW/L, achieved through the utilization of fast-switching MESFETs and the DAB topology. This research suggests that the hybrid multimodule DC-DC converter is a promising solution for fast-charging EVs, providing high efficiency, power density, and switching speed. Future studies could explore the incorporation of advanced wide bandgap devices to handle even larger power fractions.
Language	English
Publishing date	2024-02-27
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-55426-6
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Article ; Online: Late port-site metastasis of unexpected gallbladder carcinoma after laparoscopic cholecystectomy: A case report.

Aloraini, Abdullah / Alshehri, Khaled / Alshammari, Rahaf / Bin Onayq, Abdulhakim / Ayesh, Mohammed / Alzahrani, Malak / AlShammari, Sulaiman A / Alsaif, Faisal

Medicine

2024 Volume 103, Issue 18, Page(s) e37880

Abstract: Introduction: Incidental gallbladder carcinoma refers to a discovery of gallbladder cancer during or after cholecystectomy. Late port-site metastasis (PSM) following Laparoscopic cholecystectomy (LC) is rare with an incidence rate of 10.3%.: Patient ... ...

Abstract	Introduction: Incidental gallbladder carcinoma refers to a discovery of gallbladder cancer during or after cholecystectomy. Late port-site metastasis (PSM) following Laparoscopic cholecystectomy (LC) is rare with an incidence rate of 10.3%. Patient concerns: We report a case of a 58-year-old man who presented with a painful abdominal wall mass for 6 weeks. He had a history of LC for symptomatic cholelithiasis, 8 years prior. Diagnosis: Histopathological examination revealed a positive result for metastatic adenocarcinoma from the abdominal wall mass. Moreover, Positron emission tomography (PET) showed a small focus of intense fluorodeoxyglucose (FDG) uptake in the gallbladder bed, which was highly suspicious for malignancy. Intervention: Decision was to proceed with surgery owing to uptake in the gallbladder bed with single-site metastasis to the previous port site. In addition, in the board meeting, an agreement was reached for performing distal pancreatectomy with splenectomy owing to uncertainty of malignancy based on what was discovered during the full metastatic workup. Diagnostic laparoscopy followed by midline laparotomy performed. Radical completion cholecystectomy with lymphadenectomy was done. Followed by complete resection of the anterior abdominal wall. Distal pancreatectomy and splenectomy were then performed. Outcome: Pathological diagnosis showed metastatic/invasive, moderately differentiated adenocarcinoma with positive margins on the posterior surface of excised port-site mass. The positive margins necessitated further chemoradiotherapy, followed by adjuvant chemotherapy until lung metastasis was identified. After this, the patient was scheduled for palliative chemotherapy. Conclusion: Presence of PSM is often associated with peritoneal metastasis. For this reason, it is advised to evaluate the patient for possible metastasis.
MeSH term(s)	Humans ; Gallbladder Neoplasms/pathology ; Gallbladder Neoplasms/secondary ; Gallbladder Neoplasms/surgery ; Cholecystectomy, Laparoscopic/adverse effects ; Male ; Middle Aged ; Adenocarcinoma/secondary ; Adenocarcinoma/pathology ; Adenocarcinoma/surgery ; Neoplasm Seeding ; Abdominal Wall/pathology ; Incidental Findings
Language	English
Publishing date	2024-05-03
Publishing country	United States
Document type	Case Reports ; Journal Article
ZDB-ID	80184-7
ISSN	1536-5964 ; 0025-7974
ISSN (online)	1536-5964
ISSN	0025-7974
DOI	10.1097/MD.0000000000037880
Database	MEDical Literature Analysis and Retrieval System OnLINE

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