bluuebunny/crossref_metadata_2025 huggingface dataset:
Implant Survival of an Uncemented Modular Femoral Implant in Patients With Severe Femoral Bone Loss and 2‐Stage Hip Revision
Authors: Winther Sebastian , Elsayed Naima , Dyreborg Karen , Mortensen Elinborg , M. Petersen Michael. , Stürup Jens , Winther Nikolaj S.
Published: October 2024

Background and Purpose: Revision total hip arthroplasty (rTHA) is a challenging procedure especially in the presence of severe bone loss where implant fixation is compromised. The aim of this study was to evaluate implant survival, clinical outcome, and midterm results in a group of complex patients after femoral revision using an uncemented modular implant design.

Patients and Methods: We performed a retrospective study including 100 patients (101 hips) treated with revision THA using an uncemented modular implant design. We identified 51 hips as Paprosky types I‐II and 50 hips as Paprosky III‐IV bone defects. We reviewed operative reports and radiographs. Patients underwent a clinical examination to assess the Harris Hip Score (HHS) and completed patient‐reported outcome measures (PROM), including the Oxford Hip Score (OHS) and the EQ‐5D Visual Analog Scale (VAS). Minimum follow‐up was 2 years (average, 5.8 years; range, 2.0–9.4 years).

Results: Among the cases, 46 hips were revised for infection in a 2‐stage procedure and 44 hips for aseptic loosening. 11 hips had periprosthetic fractures of Vancouver type B2 or B3. A total of 5 hips required revision with removal of the femoral implant and 11 patients experienced complications resulting in fracture (n = 1), dislocation (n = 10), and soft tissue revision (n = 1). The 5‐year implant survival estimated by Kaplan–Meier survival analysis was 95% (95%‐CI: 91%–99%). All hips had radiographic evidence of osseointegration and no one with subsidence greater than 5 mm. Additionally, 80% showed radiographic evidence of restoration of proximal femoral bone. Mean HHS was 78.

Conclusion: In complex cases of revision THA, using a modular revision femoral system yielded promising results. The 5‐year implant survival estimated by Kaplan–Meier survival analysis was 95% (95%‐CI: 91%–99%), with all hips demonstrating radiographic evidence of osseointegration and no one with subsidence greater than 5 mm. Notably 80% showed radiographic evidence of restoration of proximal femoral bone.
Nurses’ Perception on the Hindrances of Triage System in Emergency Unit
Authors: Olofinbiyi Olunike Blessing , Makhado Lufuno
Published: October 2024

Background: Despite the fact that several triage tools have been implemented globally, emergency care, including the triage system, is often one of the weakest parts of the health system in developing countries, as compared to developed countries. Moreover, emergency centers in African countries are very busy, often flooded by high load of trauma patients, chronic medical conditions, acute medical emergencies, and HIV‐related conditions. These disease conditions precipitate the reasons for the prioritization of patients. In South Africa, studies conducted on the use of triage by nurses revealed that most patients are satisfied with the Nurse‐led triage service provided in emergency departments (EDs). At the same time, some Nurses also see the South African Triage Scale (SATS) as one of the easiest Nurse‐led triage tools.

Aim: The study aimed at identifying the factors hindering the effective process of triage during care provision at a selected public hospital in KwaZulu‐Natal (KZN).

Methods: This study utilized a cross‐sectional survey, employing a nonprobability convenience sampling to recruit its respondents. The recognition primed decision model formed the framework of the study. Ethical clearance was obtained from the University of KwaZulu‐Natal Ethics Review Board, and ethics principles were carefully observed throughout the study.

Results: Out of the 100 respondents, 89% (89) of the respondents perceived that various factors still impede the progress of triage, while 11% (11) of the respondents perceived that no factor impedes the progress of triage.

Conclusion: The study indicates that several factors still hinder the effective process of triage. Based on the findings of the study, factors like overcrowding, Nurses waiting for doctors when they know what to do, lack of continuous professional development on triage system, inadequate experience, lack of confidence, and lack of adequate training on triage still impede the efficient triage system.
Arbuscular Mycorrhizal (AM) Fungi Symbiosis in Sustainable Production of Sorghum (Sorghum bicolor L. Moench) Under Drought Stress: An Emerging Biofertilizer in Dryland Areas
Authors: Birhanu Mengistu Wubie , Negussie Zebyder Temesgen
Published: October 2024

Sorghum (Sorghum bicolor L. Moench) is an important cereal crop grown in arid and semiarid regions where water and other resources are limited. Changes in temperature and rainfall patterns have resulted in frequent droughts, which caused significant yield loss in sorghum. In recent years, there has been an increasing interest in sorghum cultivation due to its resilience to climate change and potential source of food and income. The symbiotic interaction of sorghum with Arbuscular Mycorrhizal fungi (AMF) has been found to induce several physiological and molecular changes that improve the ability of sorghum to withstand drought stress. This symbiotic relationship enhances water and nutrient uptake, osmotic adjustment, activation of stress‐responsive genes, stomatal regulation, and antioxidant defense, leading to improved drought tolerance in sorghum. Agricultural practices such as reduced tillage, cover cropping, intercropping, crop rotation, and the use of organic amendments promote the diversity and effectiveness of AM fungal symbiosis. Such agricultural practices create more favorable conditions for AM fungal establishment and growth while reducing dependence on synthetic fertilizers. In this review, we highlight AM fungal symbiosis on sorghum growth, physiology, and molecular mechanisms underlying the beneficial effects of AM fungal symbiosis under moisture deficit conditions. Overall, the present review elucidates sorghum production and breeding success in Ethiopia, the symbiotic mechanisms between plants and AM fungi, the prospects of biofertilizers in sustainable agriculture, the potential of AM fungal symbiosis as a sustainable approach to improve sorghum production and its synergistic effect with other crop management practices.
Table S3 from A Precision Engineered Interleukin-2 for Bolstering CD8+ T- and NK-cell Activity without Eosinophilia and Vascular Leak Syndrome in Nonhuman Primates
Authors: Ma Lina , Acuff Nicole V. , Joseph Ingrid B. , Ptacin Jerod L. , Caffaro Carolina E. , San Jose Kristine M. , Aerni Hans R. , Carrio Roberto , Byers Anthony M. , Herman Rob W. , Pavlova Yelena , Pena Michael J. , Chen David B. , Buetz Christen , Ismaili Taylor K. , Pham Helene V. , Cucchetti Margot , Sassoon Ingrid , Koriazova Lilia K. , Leveque Joseph A. , Shawver Laura K. , Mooney Jill M. , Milla Marcos E.
Published: October 2024

Table S3
Figure 1 from A Precision Engineered Interleukin-2 for Bolstering CD8+ T- and NK-cell Activity without Eosinophilia and Vascular Leak Syndrome in Nonhuman Primates
Authors: Ma Lina , Acuff Nicole V. , Joseph Ingrid B. , Ptacin Jerod L. , Caffaro Carolina E. , San Jose Kristine M. , Aerni Hans R. , Carrio Roberto , Byers Anthony M. , Herman Rob W. , Pavlova Yelena , Pena Michael J. , Chen David B. , Buetz Christen , Ismaili Taylor K. , Pham Helene V. , Cucchetti Margot , Sassoon Ingrid , Koriazova Lilia K. , Leveque Joseph A. , Shawver Laura K. , Mooney Jill M. , Milla Marcos E.
Published: October 2024

Pharmacokinetic profile of SAR’245 in a dose-range finding study in cynomolgus monkeys. SAR’245 was given i.v. at 0.03, 0.1, 0.3, and 1 mg/kg vs. vehicle once a week for three dosing cycles (days 1, 8, and 15). A, SAR’245 concentration was measured from plasma samples collected from dosed treated animals following the first dose. Mean values are shown from two animals in each group. B, Changes in WBC in response to repeat dosing with SAR’245. C, Cell count changes in response to SAR’245 dosing for lymphocytes (•) and eosinophils (◦). D, Percentage of CD8 T, NK, and CD4 Treg cells in peripheral blood. E, Percentage of Ki67 expression in CD8 T, NK, and CD4 Treg cells in the peripheral blood. F, MFI of pSTAT5 in CD8 T, NK, and CD4 Treg cells in peripheral blood. Mean ± SEM. N = 2. MFI, median fluorescence intensity; NK, natural killer; pSTAT5, phosphorylated signal transducer and activator of transcription 5.
Der Einfluss kultureller Normen auf Zwangsinhalte: Ein Scoping Review aus historischer und moderner Perspektive
Authors: Gitter Almut Andrea , Kurz Nora , Allermann Leonie , Fink-Lamotte Jakob , Haberkamp Anke
Published: October 2024

Hintergrund: Kulturelle Einflüsse auf die Entwicklung einer Zwangsstörung werden in der Forschung zunehmend adressiert. Jedoch ist wenig Wissen vorhanden, ob sich Zwangs­inhalte über die Jahrhunderte verändert und welchen Einfluss jeweilige kulturelle Prägungen auf die Entwicklung individueller Zwangsinhalte haben. Zusammenfassung: Im Rahmen dieser Studie wurden einerseits historische Quellen über Personen mit möglicher Zwangsstörung seit dem Mittelalter anekdotisch zusammengetragen. Andererseits wurden in einem Scoping Review in den Datenbanken PubMed, Web of Science und Psyndex 57 moderne Studien zum Zusammenhang zwischen kulturellen Faktoren und Zwangsinhal­ten verglichen. Kernaussagen: Es zeigen sich Anhaltspunkte für einen Einfluss kultureller Normen auf das Auftreten spezifischer Zwangsinhalte. Während für das Mittelalter nur Hinweise auf religiöse Zwangsinhalte zu finden sind, be­schreiben Berichte ab dem 19. Jahrhundert unterschied­-liche Zwangsinhalte. Aktuelle Studien unterstützen die Annahme von Zusammenhängen zwischen kulturellen Normen und Werten sowie Zwangsinhalten, zeigen aber auch Forschungslücken: Der Großteil der Studien untersucht den Zusammenhang der Zwangsstörung mit Religiosität. Außerdem beschränken sich die Stichproben vornehmlich auf westlich geprägte Länder und den Nahen Osten. Weitere kulturelle Aspekte oder andere Kulturkreise sind unterrepräsentiert. Trotz der genannten Kritik ergänzen die Befunde das bio-psycho-soziale Erklärungsmodell zur Entstehung von Zwangs­inhalten um (historische) kulturelle Umgebungsfaktoren. Die Ergebnisse werden hinsichtlich methodischer Limitationen und Implikationen für die Praxis diskutiert.
Clinical Relevance of Specific IgE in Penicillin Allergy Investigation
Authors: Lendal Victor , Fransson Sara , Mosbech Holger , Boel Jonas Bredtoft , Kahlhofen Natasha , Blom Lars H. , Poulsen Lars K. , Garvey Lene H.
Published: October 2024

Introduction: Patients with immediate type allergic reactions to penicillins are at risk of anaphylaxis on reexposure. Diagnostic gold standard is drug provocation test (DPT) if allergy is not diagnosed by other means, such as skin testing or in vitro testing with measurement of specific IgE. Specific IgE testing carries low risk for the patient and blood sampling can be performed in primary care, but it is reported to have low sensitivity. The aim of this study was to evaluate if clinical characteristics of patients with suspected allergic reactions to penicillin and elevated specific IgE to penicillins, differed from patients without specific IgE, to identify predictors for elevated specific IgE to penicillins. Methods: Levels of specific IgE to five penicillins (penicillin G, penicillin V, amoxicillin, ampicillin, and penicillin minor determinants) were available for 9,100 patients. Using multiple logistic regression, clinical data from 430 patients in this group who had elevated specific IgE to one or more penicillins were compared to data from 4,094 patients without specific IgE to penicillins, who had undergone DPT with a penicillin. Results: In total 5.2% of patients had elevated specific IgE to one or more penicillins. Significantly more patients with elevated specific IgE had a history of immediate type reactions (<2 h) (OR = 4.34, p < 0.001); circulatory symptoms (OR = 1.63, p = 0.03) or angioedema (OR = 1.46, p = 0.005). Also, significantly more patients with elevated specific IgE had been treated with adrenaline (OR = 2.21, p = 0.005), steroids (OR = 1.76, p < 0.001), or antihistamines (OR = 1.83, p < 0.001). Conclusion: A history of an immediate type reaction requiring treatment, combined with elevated specific IgE to one or more penicillins is suggestive of an IgE mediated penicillin allergy and further allergy investigations may not be needed. Specific IgE to penicillins may be used early in allergy investigation of patients with severe immediate type reactions to penicillins.
Optical Coherence Tomography Abnormalities as the Presenting Sign of an Involuted Sellar/Suprasellar Mass
Authors: Vosoughi Arshia , Micieli Jonathan A.
Published: October 2024

Introduction: Pituitary adenomas are benign tumours that can lead to visual loss through compression of the optic chiasm. Patients with pituitary adenomas often present with visual field defects (commonly bitemporal hemianopia), but some may be asymptomatic. In such cases, abnormalities may only be detected through visual field testing or optical coherence tomography (OCT) of the ganglion cell-inner plexiform layer (GCIPL), which may provide a more sensitive method for detecting such abnormalities. Case Presentation: A 72-year-old man was incidentally found to have binasal OCT-GCIPL thinning during a routine eye examination. Visual acuity was 20/20 in both eyes. Pupils were equal and reactive without a relative afferent pupillary defect. His Humphrey 24-2 SITA-Fast visual field test results were normal. A magnetic resonance imaging (MRI) revealed a nonenhancing (cystic) sellar/suprasellar mass measuring 1.7 cm craniocaudal by 2.1 cm anteroposteriorly, without associated optic chiasm compression. The lesion was suspected to be either a cystic pituitary adenoma or a Rathke’s cleft cyst. Follow-up examination 1 year later showed all findings remained stable, including an unchanged visual acuity, visual fields, OCT-GCIPL, and MRI. Conclusion: The binasal thinning observed on OCT-GCIPL in this case, despite the absence of chiasmal compression on MRI, is suggestive of previous compression of the optic chiasm. This case highlights the potential for spontaneous regression of pituitary adenomas and underscores the importance of OCT-GCIPL as a vital tool for detecting optic chiasmal damage.
Ophthalmomyiasis Externa: A Case Report in a Tertiary Care Center in Riyadh, Saudi Arabia
Authors: Althnayan Yasser Ibrahim , Alhadlaq Omar Saad
Published: October 2024

Introduction: Ophthalmomyiasis externa, which is caused by Oestrus ovis larvae, is a parasitic eye infestation that is prevalent in tropical and subtropical regions. It occurs in rural settings and is associated with risk factors, such as poor sanitation and underlying health conditions. Reports on this disease in Saudi Arabia are rare. Case Presentation: A 30-year-old man from a rural area in Riyadh presented with severe left eye irritation and redness after being hit by an insect. Examination revealed seven motile larvae, which were identified as O. ovis, on the conjunctiva. The larvae were mechanically removed, and the patient was treated with topical antibiotics. On follow-up, four additional larvae were found and removed. Symptoms resolved completely, with no further larvae detected on subsequent follow-up. Conclusion: Thorough history and examination are essential for the diagnosis of ophthalmomyiasis, especially in rural areas. Early detection and intervention are vital to prevent serious complications. This case highlighted the importance of awareness among healthcare providers.
Impact of Fetal Umbilical Cord Blood CD34+ Cells on Breast Cancer Cell Lines: A Mechanism of Fetal Microchimerism
Authors: Kolanska Kamila , Roche Merwane , Carrière Camille , Le Gac Marjolaine , Ferrand Nathalie , Zaoui Maurice , Le Gall Morgane , Selleret Lise , Gligorov Joseph , Sabbah Michèle , Aractingi Selim , Chabbert-Buffet Nathalie
Published: October 2024

Introduction: Fetal microchimerism could be involved in the regulation of breast cancer oncogenesis. CD34+ cells could be of a particular interest as up to 12% of the CD34+ population in maternal blood are of fetal origin. The aim of this research was to analyze the impact of umbilical cord blood (UCB) CD34+ on MCF-7 and MDA-MB-231 breast cancer cell lines, in order to uncover novel biological mechanisms and suggest novel treatment options for breast cancer. Methods: UCB CD34+ cells were obtained from healthy women at full-term delivery. Direct cultures were grown with MCF-7 and MDA-MB-231 cells. Proliferation, migration, invasion, and transcriptomic analysis of breast cancer cell lines were compared between cultures exposed and nonexposed to UCB CD34+ cells. Interactions between UCB CD34+ and breast cancer cells were analyzed under fluorescent microscopy. Functional analyses were generated with QIAGEN’s Ingenuity Pathway Analysis (IPA) and Gene Set Enrichment Analysis (GSEA). Results: Direct contact between UCB CD34+ and breast cancer cell lines induced a reduction in the proliferative capacities of MCF-7 and MDA-MB-231 and diminished the migration abilities of MDA-MB-231 cells. In 3D coculture, UCB CD34+ cells were attracted by tumor spheroids and incorporated into tumor cells. These cell-to-cell interactions were responsible for transcriptome modifications coherent with observed functional modifications. Among the cytokines secreted by UCB CD34+, IFN-γ was identified as a potential upstream regulator responsible for the molecular modifications observed in transcriptomic analysis of MCF-7 breast cancer cells exposed to UCB CD34+ cells, as was IL-17A in MDA-MB-231 cells. Conclusion: Direct cell-to-cell contact induced functional modifications in breast cancer cells. Interactions between UCB CD34+ and breast cancer cells could induce cell fusion and signal transmission via cytokines. Further analysis of direct cell-to-cell interactions should be performed at a molecular level to further understand the potential role of fetal CD34+ cells in breast cancer.
Stackable independent power switch cell architecture for isolation voltage summation using WBG devices
Authors: Carrá Martín Javier , Tacca Hernan Emilio , Lipovetzky José
Published: October 2024

Power electronics is a critical driver of innovation in industries like renewable energy, electric vehicles, and consumer electronics. While silicon (Si) devices have been dominant for five decades, escalating demands for higher power density expose limitations in terms of blocking voltage capacity, operational temperature, and switching frequency. Wide band-gap (WBG) materials, such as silicon carbide (SiC) and gallium nitride (GaN), offer compelling alternatives with low input capacitance, reduced losses, and excellent thermal characteristics. In addition, expanding electrical capabilities involves constructing an array of devices, such as series-connected power MOSFETs. This configuration offers advantages like higher blocking voltage, lower conduction losses, and reduced costs. This paper introduces the design of a fast-switching, stackable switching unit cell (SSUC) utilizing SiC MOSFET devices as power components. The SSUC facilitates the creation of versatile compound switches. To protect the power switch from harmful voltages and current spikes, the design incorporates both an active voltage clamp and a snubber with energy recovery. This feature extends the number of stages that can be connected in series. Experiments with a three-stage compound device, successfully tested at 3 kV, validate the practical applicability and flexibility of this concept.
Nonlinear robust control applied to the six-phase induction machine
Authors: Ahmed Yarba , Oumar Aichetoune , Cherkaoui Mohamed
Published: October 2024

This paper proposes a nonlinear robust control for the six-phase induction machine (SPIM). It is based on the super twisting sliding mode (STSM) to ensure good decoupling and robust performance. This paper proposes also a comparative study between STSM and active disturbance rejection control (ADRC). We apply the rotor field-oriented control to ensure the decoupling between the magnitudes of the SPIM. Then we study the STSM control to regulate the rotor speed, the stator currents, and the rotor flux of the machine. The STSM ensures the same performance as the classical sliding mode control with the advantage of reducing the phenomenon of chattering. At the same time, the STSM command is compared to the ADRC command. The ADRC is one of the robust commands that makes it possible to estimate and eliminate internal or external disturbances. To test the robustness of the STSM and the ADRC, we implanted them in Simulink/MATLAB and the simulation results show the effectiveness of the STSM control compared to the ADRC control.
Load forecasting analysis for estimating transformer capacity of Karangkates Substations using Holt-Winters method in Python
Authors: Rahmawati Yuni , Kaki Gregorius Paulus Mario Laka , Aripriharta Aripriharta , Sujito Sujito , Afandi Arif Nur , Wibawa Aji Prasetya , Purwatiningsih Ayu , Bagaskoro Muhammad Cahyo , Omar Saodah , Rosmin Norzanah
Published: October 2024

In the six years from 2010 to 2015, the peak load in the East Java region increased by an average of 284MW per year. Karangkates Substation is part of an interconnected electrical system that supplies Java Island. To ensure a high level of reliability in its service, it is necessary to prepare for load growth to make sure that it does not exceed its ideal conditions, therefore special analysis of transformer capacity is needed. Using the Holt-Winters (HW) method as a reference for processing the data can be used as a reference in planning and anticipating the growing electricity demand. The results of this study are with the accuracy of the HW method with mean absolute percentage error (MAPE) = 2.645%, while the accuracy of the fuzzy time series (FTS) method = 6.399%. A forecast result done with HW methods shows the transformer at the substation Karangkates reached its normal working capacity in March 2018 at 99.583% of installed capacity and exceeded the maximum capacity in April 2018 at 101.493% of installed capacity.
Performance analysis of fifteen level reduced device count asymmetrical multilevel inverter
Authors: Manivel Murugesan , Palani Lakshmanan , Subramani Sivaranjani , Thiagarajan Bharani Prakash , Kannusamy Divya , Devasahayam Jebakumar Immanuel , Vijayalakshmi V. J.
Published: October 2024

In this article, a fifteen-level reduced device count asymmetrical multilevel inverter is introduced for electric vehicle applications. This novel multilevel inverter topology minimizes the power switches required. Control of the proposed inverter is accomplished via the nearest-level control method. In a typical multilevel inverter, ten to twelve switches are used to create the fifteen levels. A high number of switches are used in traditional multilevel inverters, which increases the distortion from all harmonics, switching losses, cost, and cost per switch. Only nine switches are needed for the suggested architecture. It significantly minimizes the total harmonic distortion by 5% and lowers the switching losses, low-order harmonics, and complexity. The efficiency of the suggested multilevel inverter (MLI) is 98.35%.
Robust adaptive sliding mode control of a bidirectional DC-DC converter feeding a resistive and CPL based on PSO
Authors: Cham Julius Derghe , Koffi Francis Lénine Djanna , Boum Alexandre Teplaira , Harrison Ambe
Published: October 2024

A DC-DC converter functioning in bidirectional (two-way) mode is a crucial component of direct current (DC) microgrids since it allows electricity to flow in both directions. However, because of load changes and other factors, the DC-bus voltage might become unstable. This research proposes a robust adaptive controller for a half-bridge two-way DC-DC converter founded on particle swarm optimization (PSO). Using a DC-DC half-bridge bidirectional converter, the effectiveness of various conventional and proposed control techniques is investigated. In comparison to a conventional sliding mode controller (CSMC), it is found that a PSO-based sliding mode control with an adaptive law is the optimal control approach for a bidirectional half-bridge DC-DC converter. This is because minimal steady-state error and the shortest rising and settling times are guaranteed. The benefits of robustness, chattering reduction, and simple design are combined in the suggested controller, which is especially beneficial when dealing with load and input voltage changes. The controller ensures robustness and stability in the face of parameter changes. Numerical simulations conducted in a MATLAB-Simulink environment on a DC-DC half-bridge converter operating in bidirectional mode show the controller's improved performance over its existing counterpart.
Enhancing power quality: An Adaline algorithm for direct resonance current extraction in shunt active power filter
Authors: Rahman Nor Farahaida Abdul , Zainuri Muhammad Ammirrul Atiqi Mohd , Hannoon Naeem M. S. , Hidayat Muhamad Nabil , Baharom Rahimi , Munim Wan Noraishah Wan Abdul
Published: October 2024

This paper presents an adaptive linear neuron (Adaline) algorithm designed to extract resonance current from the supply current directly. It aims to reduce the computation burden while upholding efficacy in the extraction process. The approach involves establishing the primary power system, evaluating harmonic and resonance current impacts, formulating efficient extraction strategies based on current waveform characteristics, employing the Adaline algorithm for extraction, and constructing a single-phase shunt active power filter (SAPF) to address harmonic currents and parallel resonance effects. Comparative analysis demonstrates the Adaline algorithm’s precision in extracting current amplitudes pre- and post-SAPF implementation. However, observed disparities in extracted resonance current amplitude may stem from the algorithm’s limitations in capturing low-amplitude signals. While a gain adjustment effectively boosts amplitude. However, it introduces considerable ripple and inconsistency, likely linked to parallel resonance effects. Notably, the SAPF exhibits simultaneous harmonic compensation and resonance damping capabilities. Results affirm the SAPF’s effectiveness in reducing harmonic components across all frequencies, including resonance frequency. Furthermore, resonance damping is crucial for further improving SAPF performance and reducing resonance current. This results in significantly improved waveform quality and reduced total harmonic distortion (THD) and individual harmonic distortion (THDi) values of compensated supply current.
Forecasting hourly short-term solar photovoltaic power using machine learning models
Authors: Jogunuri Sravankumar , Josh F. T. , Joseph J. Jency , Meenal R. , Das R. Mohan , Kannadhasan S.
Published: October 2024

Forecasting solar photovoltaic power ensures a stable and dependable power grid. Given its dependence on stochastic weather conditions, predicting solar photovoltaic power accurately demands applying intelligent and sophisticated techniques capable of handling its inherent nonlinearity and volatility. Controlling electrical energy sources is an important strategy for reaching this energy balance because grid operators often have no control over use patterns. Accurately forecasting photovoltaic (PV) power generation from highly integrated solar plants to the grid is essential for grid stability. This study aims to improve forecasting accuracy and make accurate predictions of solar power output from the selected grid-connected PV system. In this study, the weather data was collected on-site and recorded PV power from a 20 kW on-grid system for one year, and different machine learning techniques like deep neural networks, random forests, and artificial neural networks were evaluated and benchmarked against reference support vector regression model. With improvements in forecasting accuracy of 2 to 37% over the reference model at study location (22.780 N, 73.650 E), College of Agricultural Engineering and Technology, Anand Agricultural University, Godhra, India, simulation results showed that the random forest technique is effective for the forecasting horizons of 1 to 4 hours.
Machine learning based optimal control of modular converter for PV assisted power supply systems
Authors: Teja Srungaram Ravi , Yadlapati Kishore
Published: October 2024

This paper presents the topology and machine learning-based intelligent control of a single-stage grid-connected high-power photovoltaic (PV) system for quality power export to the grid and optimal net energy utilization. A nineteen-level bi-modular inverter is proposed for efficient single-stage PV power conversion. The proposed integrated intelligent machine learning-based control serves for power conversion control as well as supervisory control for hourly PV energy estimation and load demand control for optimal energy consumption. The objectives of power control are extracting maximum power from PV sources and exporting power to the grid at unity power factor. While the objectives for supervisory control are local load demand control for exporting power at higher export prices. The proposed system is implemented using MATLAB/Simulink to validate the efficiency of power conversion, effectiveness of machine learning for energy estimation, and load relay control for optimal energy pricing. The results proved efficient tracking of maximum power, unity power factor at grid terminals, and load relay control for PV energy availability and export cost function.
Design system and performance analysis of fish storage box by utilizing solar energy
Authors: Setiawan Rizal Justian , Ma'ruf Khakam , Darmono Darmono , Suryanto Indra Dwi , Hermawan Andi Tri
Published: October 2024

Indonesia is a maritime country and many people work as traditional fishermen. Traditional fishermen generally use thermos filled with wet ice, ice boxes, or ice blocks to maintain the freshness of fish. The temperature obtained is still insufficient to maintain the fish’s quality and freshness. Furthermore, some existing technologies are expensive and use fossil fuels. Researchers designed and manufactured a cool box that utilizes solar energy to store fish. The experimental research method was conducted by testing the performance of the cool box device at four different locations. The results showed that the solar panel produced an average of 2,527.2 W of energy in a day, which can power the cool box device for 10 hours. To maintain the fish’s freshness with the reference temperature of 0 °C-5 °C, the device uses temperature control to prevent the fish from freezing, which damages its structure. The temperature control also helps the tool save energy, allowing it to last 170 minutes longer than without using the temperature control feature.
Evaluation of the operational efficiency of 3 MWp photovoltaic power plant situated in the Sahara Desert of Algeria
Authors: Chaib Messaouda , Dahbi Abdeldjalil , Benatiallah Ali
Published: October 2024

The primary aim of this study is to examine the behaviour of the photovoltaic plant installed in Kabertene, Algeria, under desert climate conditions. Simulations and modeling have been carried out for the photovoltaic cell, panel, and array under standard test conditions as well as a range of different operating conditions. Furthermore, the photovoltaic (PV) plant has been simulated using measured data, PVsyst, and MATLAB Simulink. The aim was to assess the solar energy potential within the examined geographic area and evaluate the performance of the PV plant. The performance of the obtained results was compared in different cases. The real results closely match those of PVsyst and MATLAB software when using real data and the real performance ratio, because it takes into consideration the cleanliness state of the PV panels. The results indicate that environmental factors, especially solar radiation and temperature, exert a considerable effect on the operational capacity of the PV system. This leads to variations in the electrical energy output and the performance ratio of the system. The total yearly energy injected into the grid was 5028.21625 MWh. The annual average daily PV system performance ratio is 67%. Finally, the research concludes that the area has substantial solar potential, encouraging the development of new PV plants.
Solar power plant 618.8 kWp monitoring correction on the Fusion application
Authors: Hutauruk Sindak , Siagian Pandapotan , Sitinjak Reinhard A.
Published: October 2024

Monitoring of energy produced by the solar power plant (SPP) with a capacity of 618.8 kWp at HKBP Nommensen University in Medan is carried out using the FusionSolar application. This SPP energy management application includes displaying yield, energy consumption, energy exports, and SPP energy imports. The amount of energy displayed using the FusionSolar application is compared with the amount of energy resulting from manual calculations based on power data displayed on the alternating current (AC) combiner panel from 3-phase inverters. This comparison was carried out over seven days of measurements. It produced an average difference of 5.779%, with a correction value of 0.942, so the energy reading resulting from the FusionSolar application must be multiplied by this correction value.
Development of an advanced current mode charging control strategy system for electric vehicle batteries
Authors: Fang Liew Hui , Romli Muhammad Izuan Fahmi , Rahim Rosemizi Abd , Aziz Muhammad Ezanuddin Abdul , Rahman Diyya Hidayah Abd , Mokhtaruddin Habibah Haji
Published: October 2024

Electric vehicles (EVs) face customer hesitancy due to challenges in locating fast charging stations, lengthy recharging times, and incompatible charging ports. This research addresses these issues by proposing a novel current mode control strategy for EV battery charging. Traditional charging methods often result in suboptimal rates, battery degradation, and safety risks. The primary objective is to enhance charging efficiency, safety, and battery lifespan by optimizing parameters such as voltage and current. Control mode charging offers significant advantages over plug-in charging by minimizing stress factors that contribute to degradation, such as high temperatures and excessive charging cycles. This approach aims to extend the lifespan of EV batteries while ensuring safe, efficient, and fast charging. The control system offers three charging modes: slow (0.49 A, 6.31 W, 264 mins), medium (2.74 A, 34.85 W, 50 mins), and fast (4.62 A, 50.80 W, 30 mins) using a 12 V single-phase supply. This advanced strategy significantly improves EV charging system efficiency, with fast charging achieving 80% higher efficiency than slow charging in both simulations and experimental testing. The key contribution of this research is the development of a tailored current mode charging strategy that optimizes charging efficiency while ensuring battery longevity and safety.
Assessing the Condition and Damage of a Stilt Wooden Home in an Area Prone to Floods
Authors: Hasmeddy Nur Qamariah , Biton Ara Billa , Chin Avyda Tang Pei , Idek Sirhajwan , Danil Jovinia , Amin Dayang Amidah , Khatijah Dayang Siti
Published: October 2024

This study was intended to assess condition and damages of a stilt wooden house located in in Keningau, Sabah, in order to develop a proper home repair and restoration plan that can be scaled up to other houses of similar design in areas that are susceptible to flood and other environmental factors which can affect the structural integrity. The findings revealed that the chosen stilt wooden house has decayed severely that many parts of the house mainly the roof, the floors, the railing and stairs were in decrepit condition which could pose danger to the occupants. The results also implied that there were various factors that led to the condition of the house namely termite infestation and moist and weakened wood which could be due to the damaged zinc roof that caused rainwater to leak into the house, direct contact with floodwater and possibly leaky plumbing.  A repair and restoration work was done by focusing on the parts of the house that needed immediate fix in order to ensure comfort and safety of the household. This study may shed more light on how to repair and restore as well as redesign wooden homes in order to be more resilient towards damaged caused by environmental variables.
PT Pertamina Patra Niaga Aviation Fuel Terminal (AFT) Syamsudin Noor Duta Duta Bahtera Program in Realizing Community-Based Sustainable Development Goals (SDG's) in Banjarbaru
Authors: Faidah Ramadhani  , Dimas Budiman  , Risky Diba Avrita  , Amrizarois Ismail
Published: October 2024

Duta Bahtera Program implemented by PT Pertamina Patra Niaga Aviation Fuel Terminal (AFT) Syamsudin Noor, Banjarbaru, is an initiative to reduce malnutrition rates through a community-based approach. This program involves multiple stakeholders, such as integrated health post cadres, parents, health centres and nutritionists in training activities, providing additional food, and socializing good parenting patterns. This is descriptive qualitative research to examine the implementation of the Duta Bahtera Program by PT Pertamina Patra Niaga AFT Syamsudin Noor, Banjarbaru and its relation to the Sustainability Development Goals (SDGs). The results of Duta Bahtera program showed that the program contributes significantly to public health and can be used as a model for similar programs in other areas. With effective collaboration and empowerment, this program creates a strong foundation for a healthier future for children in Indonesia. Thus, the Duta Bahtera Program has a role in supporting the achievement of Sustainable Development Goals (SDGs), especially in eradicate poverty (SDG 2), improving health and well-being (SDG 3), and empowering communities and building multi-party collaboration (SDGs 17). This program also shows efforts to maintain a balance between environmental sustainability, economic growth and community welfare as a symbol of achieving the Triple Bottom Line SDGs.
Impact of Instructional Supervision Strategies on Teacher Performance in Hinabangan Samar District 1
Authors: Castillo Mitchel A.
Published: October 2024

The effectiveness of instructional supervision strategies on teacher performance is a critical area of educational research. This study aimed to determine the effectiveness of different instructional supervision strategies employed by school heads and their impact on the instructional performance of teachers in the Hinabangan Samar District I. This study utilized the descriptive-correlational research design using the researcher-developed survey questionnaire administered to 81 public school teacher-respondents who were randomly sampled. The high effectiveness of school heads' instructional supervision practices in the Hinabangan Samar District I as evidenced by a composite mean of 4.82 highlights the positive influence of strong leadership and supportive practices. The very high positive correlation observed in the Hinabangan Samar District I reinforce the importance of robust supervision systems in educational settings. School heads should prioritize regular classroom observations, provide constructive feedback, and offer professional development opportunities. Additionally, fostering a collaborative culture among teachers can further enhance the effectiveness of instructional supervision.
Larvicidal Activity of Zingiber purpureum Roscoe Essential Oil from East Kalimantan in Preventing Dengue Hemorrhagic Fever
Authors: Syahdumawarta Lirana Imute , Toruan Vera Madonna Lumban , Paramita Swandari , Zubaidah Mona
Published: October 2024

Temephos is extensively employed currently to eliminate Aedes aegypti mosquito larvae, thus preventing the spread of dengue fever. Raising the level of temephos application can lead to health issues for individuals and long-term detrimental impacts on the environment. This research aims to demonstrate that Z. purpureum Rosc. essential oil effective in eliminating more than 70% of Aedes aegypti mosquito larvae. Z. purpureum Rosc.essential oil was diluted with Tween 80 to achieve various concentrations, namely 12.5 μg/mL, 25 μg/mL, 50 μg/mL, and 100 μg/mL. A positive control was established using temephos at a concentration of 0.012 mg/L, while a negative control was prepared using clean water. The larvae were subjected to these treatments for a duration of 48 hours, with three repetitions conducted. The data were analyzed using the Kruskal Wallis Test that shows a significant difference between treatment groups, with a p value <0.05. A concentration of 12.5 μg/mL of Z. purpureum Rosc. essential oil was found to effectively eliminate 76.67% of Aedes aegypti mosquito larvae. A concentration of 25 μg/mL of Z. purpureum Rosc. essential oil was found to effectively eliminate 86.67% of Aedes aegypti mosquito larvae. A concentration of 50 μg/mL of Z. purpureum Rosc. essential oil was found to effectively eliminate 96.67% of Aedes aegypti mosquito larvae. A concentration of 100 μg/mL of Z. purpureum Rosc. essential oil was found to effectively eliminate 100% of Aedes aegypti mosquito larvae. The overall findings show that more than 70% of Aedes aegypti mosquito larvae are effectively killed by Z. purpureum Rosc. essential oil at a concentration of 12.5 μg/mL.
Um escrito inédito do indígena Antônio Paraupaba e o ocaso das relações Potiguara-neerlandesas (1654-1656)
Authors: Miranda Bruno Ferreira , Silva Rafael , Costa Suzane Lima
Published: October 2024

Em outubro de 1654, Antônio Paraupaba, indígena Potiguara, escreveu uma carta para o Grande Pensionário da Holanda, Johan de Witt. Paraupaba mostrava-se preocupado com sua família, que residia numa ilha das Caraíbas sob controle neerlandês. Pedia, por fim, autorização para trazê-los aos Países Baixos. A dramática história de Paraupaba se funde com as relações dos Potiguara com os neerlandeses e seu envolvimento nas guerras indígena-luso-hispano-neerlandesas (1624-1654). O objetivo deste artigo é apresentar e traduzir uma missiva desconhecida feita por Paraupaba e conectá-la às alianças estabelecidas entre os Potiguara e os neerlandeses, bem como aos usos da escrita por parte dos Potiguara.
Determinação de indicadores RE-AIM para avaliação da Estratégia Amamenta e Alimenta Brasil
Authors: Melo Daiane Sousa , Buccini Gabriela , Venancio Sonia Isoyama
Published: October 2024

OBJETIVO: Confirmar o diagrama dos caminhos de impacto do programa e funções centrais da Estratégia Amamenta e Alimenta Brasil (EAAB) e determinar indicadores para avaliação da EAAB. MÉTODOS: Trata-se de um estudo qualitativo, inserido no campo da pesquisa de implementação. A coleta de dados incluiu dois grupos focais com implementadores da EAAB, análise documental e revisão da literatura. A análise incluiu revisão das sugestões dos participantes e duas etapas de revisão do diagrama e dos nomes dos caminhos de impacto e funções centrais. Em seguida, foram construídas questões para a avaliação da EAAB com base no diagrama confirmado. Os indicadores do framework R E-AIM ( reach, effectiveness, adoption, implementation, maintenance) foram adaptados para o contexto da EAAB. As questões de avaliação foram revisadas segundo domínios RE-AIM e, por fim, foram determinados indicadores para cada questão de avaliação. RESULTADOS: Este estudo avançou na análise d e implementação da EAAB, definindo 22 indicadores para seu monitoramento e avaliação. A maioria dos indicadores já são utilizados na implementação, entretanto, a análise com o framework RE-AIM permitiu atualizar os indicadores para serem mais específicos, mensuráveis e relevantes para os objetivos desejados. CONCLUSÃO: Os resultados do estudo apoiam a aplicação pragmática da avaliação RE-AIM em programas de saúde e incentivam o planejamento de indicadores de avaliação de outros programas de saúde e desenvolvimento infantil na atenção primária.
Plasma Protein Biomarkers and Long‐Term Cardiovascular Mortality Risk in Patients With Chronic Coronary Heart Disease
Authors: Stewart Ralph A. H. , Robledo Kristy P. , Tonkin Andrew M. , Keech Anthony , Kritharides Leonard , Marschner Ian , Janus Edward , Thompson Peter L. , Watts Gerald F. , Zeller Tanja , White Harvey D. , Simes John
Published: October 2024

Background

Protein biomarkers that reflect different pathophysiological pathways have been associated with the risk of adverse cardiovascular events. However, it is uncertain whether these associations are sustained with increasing years after the biomarkers are measured.

Methods and Results

In this cohort study, 7745 patients with coronary heart disease who participated in the LIPID (Long‐Term Intervention With Pravastatin in Ischemic Disease) trial, BNP (B‐type natriuretic peptide), troponin I, cystatin‐C, C‐reactive protein,
d
‐dimer and midregional proadrenomedullin were measured at baseline and after 1 year. Discrimination of plasma biomarker concentrations for cardiovascular death were evaluated in landmark analyses from 1 year for the next 5 years of the randomized trial, and for 10 additional years after trial completion. All 6 biomarkers were associated with risk of cardiovascular death (n=1903) both during and after the clinical trial (each
P
<0.001). C‐statistics for BNP were 0.706 and 0.704; cystatin‐C, 0.686 and 0.693; troponin I, 0.686 and 0.689; C‐reactive protein, 0.655 and 0.684;
d
‐dimer, 0.670 and 0.679, and midregional adrenomedullin, 0.686 and 0.688, respectively. In multivariable models, adding all 6 biomarkers to models with clinical risk factors increased the C‐statistic for cardiovascular death from 0.709 to 0.775 during the clinical trial, and from 0.713 to 0.751 during 10‐year follow‐up after the randomized trial (
P
<0.001 for both).

Conclusions

In patients with chronic coronary heart disease, biomarkers that reflect different pathophysiological pathways are associated with the risk of cardiovascular death for at least the next 15 years.
Cost‐Utility Analysis of Low‐Dose Pioglitazone in a Population With Prediabetes and a History of Stroke or Transient Ischemic Attack
Authors: Yuan Fei , Spence J. David , Tarride Jean‐Eric
Published: October 2024

Background

Pioglitazone significantly reduces the risk of stroke in people with diabetes, and in those with prediabetes, it markedly reduces the risk of stroke/myocardial infarction and new‐onset diabetes. Low‐dose pioglitazone provides most of the clinical benefits of high‐dose pioglitazone, with fewer adverse effects. We report an economic evaluation of the cost‐effectiveness of low‐dose pioglitazone versus placebo from a Canadian public payer perspective in 2023 Canadian dollars.

Methods and Results

A Markov model was developed at a lifetime horizon with an annual cycle length and 5 health states (event‐free, myocardial infarction, stroke, new‐onset diabetes, and death). Transition probabilities were extracted from the IRIS (Insulin Resistance Intervention in Stroke) trial. Health state costs and utilities were based on public sources. Annual discount rates of 1.5% were applied in the reference‐case analysis. Probabilistic analyses were conducted to deal with parameter uncertainty through 5000 simulations. The costs were estimated as $24 887 (interquartile range [IQR], $14 632–$41507) for low‐dose pioglitazone and $57 301 (IQR, $48 730–$67368) for placebo, resulting in a cost saving of −$30 287 (IQR, −$43 374 to −$14 587) in favor of low‐dose pioglitazone. Quality‐adjusted life years were estimated as 25.99 (IQR, 24.56–26.81) for the low‐dose pioglitazone and 19.44 (IQR, 18.68–20.13) for placebo, resulting in a difference of 6.37 (IQR, 5.07−7.36) in favor of low‐dose pioglitazone. Consistent findings were observed from scenario analyses and 1‐way probability sensitivity analyses.

Conclusions

Holding across a wide range of values in modeling parameters, low‐dose pioglitazone is found as the dominant strategy versus a placebo.