bluuebunny/crossref_metadata_2025_split huggingface dataset:
Inductor Based I-V Curve Tracer for Photovoltaic Panels
Authors: BOREKCİ S. , ACAR N. C. 
Published: April 2023

Abstract
The output power of a photovoltaic panel (PV) panel is depend on temperature and irradiance. Aging, partial shading and electrical load can also affect the operating current and voltage of a PV. The usage of I-V curves take important place in the designing and operating PV system. I-V curve tracers are used to determine the performance of PV panels at any environmental condition. In this study, a simple, effective, and rapid I-V curve tracer method is described for photovoltaic (PV) panels. The method is developed based on transient analyses of current and voltage of an inductor which is connected to the 175 W standalone PV panel as a load via a semiconductor switch. The I-V and P-V characteristics curves of the PV panel are obtained in few microseconds rapidly.
Exploring the distribution, trends, and causal associations of household economic burden in Australia during the COVID-19 pandemic lockdown blues (2020-2021): A longitudinal national survey
Authors: Mahumud Rashidul Alam , Kundu Satyajit , Mosharaf Md Parvez , Kamara Joseph Kihika , Rahman Md. Ashfikur , Mohsin Mohd , Ali Mohammad Afshar , Sheikh Nurnabi , Mistry Sabuj Kanti , Alam Khorshed , Khan Jahangir AM 
Published: April 2023

Abstract

BackgroundThe COVID-19 pandemic lockdown blues have triggered health emergencies and economic shocks around the globe. While the prolonged lockdown helped to reduce the spread of the disease it posed multifaceted economic downturns. This study investigated the household economic burden (HEB) denominated by the COVID-19 pandemic lockdown in Australia.MethodsWe used the data from the ‘ANU Poll 2020–2021 Longitudinal’ survey, which was undertaken among Australian adults and followed a prospective longitudinal quantitative design. The longitudinal effect was captured using a random-effects ordered logistic regression analysis, which predicted changes in the relationship between HEB and participant’s employment status, geographical distribution, and socio-economic status controlling for age, gender, education, and citizenship status.ResultsSix percent of the participants underwent an extreme level of HEB (6.08%, 95% confidence interval, CI: 5.74–6.44), whereas 13.29% (12.80–13.80) of participants experienced severe HEB, and 46% (45.12–46.60) faced the limited HEB. The magnitude of extreme level of HEB was pronounced among permanently sick/disabled (22.35%, 18.97–26.14) and unemployed (12.35%, 10.65–14.28) participants. Permanently sick/disabled (adjusted odds ratio, OR = 7.82; 5.69–10.75) and unemployed (OR = 4.53; 3.64–5.63) participants were significantly more likely to have high-level HEB, compared to participants in paid work. The odds of having a high-level HEB were significantly higher among participants who lived in New South Wales (OR = 3.03; 1.37–6.68) followed by Victoria (OR = 3.31; 1.50–7.31), Queensland (OR = 3.27; 1.50–7.31) and Western Australia (OR = 3.55; 1.53–8.26).ConclusionA substantial proportion of the Australian population experienced a high-level HEB due to COVID-19 pandemic lockdown blues, which were more pronounced among the permanently sick/disabled individuals. This HEB might lead to a considerable burden on the Australian national economy. Therefore, policymakers should consider developing and improving sustainable economic recovery strategies to diminish the inequalities accentuated by the lockdown blues, especially among the marginalised strata.
Characterization of the oral microbiota and the relationship of the oral microbiota with the dental and periodontal status in children and adolescents with nonsyndromic cleft lip and palate. Systematic literature review and meta-analysis
Authors: Castellano Andrea Tatiana Bustos , Iñahuazo Mayra Alexandra Eras , Pardo Maria del Pilar Bernal , Castillo Angela Suarez , Arregoces Francina María Escobar 
Published: April 2023

Abstract
Objective To identify the characteristics of the oral microbiota and the relationship of the dental caries and periodontal status in patients aged 0 to 18 years with nonsyndromic cleft lip and palate (CLP).Material and methods A systematic review of the literature was carried out. Five databases were consulted, including publications in English, Spanish and Portuguese. The evaluations of the quality of the observational studies and the experimental studies were carried out with the Newcastle–Ottawa scale and CONSORT guidelines, respectively. The risk of bias of the studies was determined using Rev Manager 5.4, and 5 publications were meta-analyzed.Results In cariogenic microbiota, Lactobacillus spp. and Streptococcus mutans were identified at high levels, and the related periodontopathogenic microorganisms were Prevotella intermedia, Prevotella nigrescens, Porphyromonas gingivalis, Fusobacterium spp., Campylobacter spp., and Fusobacterium nigrescens. The microorganisms found in pre- and postoperative interventions were Staphylococcus aureus, Klebsiella pneumoniae, Klebsiella oxytoca, Streptococcus pyogenes, Moraxella catarrhalis, methicillin-resistant Staphylococcus aureus and Candida spp., with great heterogeneity in microbiological counts. The meta-analysis revealed that patients with CLP were 2.03 times more likely to have cavities than was the control group (p < 0.005).Conclusion In the microbiota, there was a great diversity of microorganisms that can vary according to the type of fissure and surgical interventions predisposing patients to a greater probability of dental caries.Clinical relevance To study the oral microbiota in CLP that facilitates the progression of dental caries and periodontal disease, take it into account in clinical decision-making and adopt preventive measures to reduce oral comorbidities.
Anterior column realignment via a minimally invasive hybrid approach in adult spinal deformity surgery: an analysis of radiographic and clinical outcomes
Authors: Feng Da Peng , Liu Ming Quan , Zhang Wei , Wang Jia Qi , Li Zheng Wei 
Published: April 2023

Abstract
Background：Osteotomy and Orthopedics is the leading way to treat adult spinal deformity (ASD), but there are many surgical complications. meanwhile, oblique lumbar interbody fusion(OLIF) and anterior lumbar interbody fusion (ALIF) have becoming an increasingly popular surgical method of spinal surgery. Thus, the purpose of this study is to explore the feasibility and safety of minimally invasive anterior column realignment(ACR) in the treatment of adult spinal deformities.
Methods:A total of 64 patients were included in the study. All patients received OLIF and/or ALIF and ACR, combined with Percutaneous pedicle screw fixation(PPSF). The surgical effect was evaluated by the operation time, bleeding volume, intervertebral space angle (IVA), lumbar lordosis (LL), the sagittal vertical axis (SVA), visual analog pain score (VAS), Japanese orthopedic association scores (JOA) and complications.
Results: All patients completed 173 fusion segments; For 155 segments of ACR surgery, the average sagittal correction angle of each ACR segment was 15.3 ° ± 5.8 °. The mean preoperative and postoperative lumbar lordosis were, respectively, -16.7 ° ± 6.4 °and -48.6 ° ± 10.7 ° (p<0.001). JOA, VAS and other scores were significantly improved compared with those before operation.
Conclusion: Anterior column realignment via a minimally invasive hybrid approach for adult spinal deformity can achieve good clinical outcome and deformity correction.
Global Error Bounds for Linear Semi-infinite System over Polyhedral Constraints
Authors: Li Xiao-Bing , Al-Homidan Suliman , Ansari Qamrul Hasan , Yao Jen-Chih 
Published: April 2023

Abstract
This paper studies the Lipschitz / Hölder type global error bound for a linear semi-infinite systemover a polyhedral constraint. It is shown that the linear semi-infinite system admits aLipschitz type global error bound,which extends many existing results assuming a Slater condition on the recession functionor the boundedness of the feasible solution set. The Lipschitz type global error bound is also established under the data in the linear semi-infinite systemvarying in a bounded polyhedral set. Moreover, we discuss the relationship among the Hölder type global error boundand several notions of Hölder-type metric regularity for the linear semi-infinite systemunder a certain asymptotic condition or a assumption on boundedness of the feasible solution set.
Mathematics Subject Classification (2000) 49K40 · 90C29 · 90C31
More susceptible psychological status of front-line medical staff than temporary workers in China during public health emergency related to COVID-19: a cross-sectional study
Authors: Leng Kunkun , Chen Xu , Jin Binbin , Xu Yongjie , Jin Hui 
Published: April 2023

Abstract
Our study aimed to investigate the psychological status of medical staff and temporary workers in a fangcang shelter hospital in China and analyze the relevant factors affecting the psychological symptoms. A total of 380 participants were included in a cross-sectional online survey in a fangcang shelter hospital in Hangzhou, China, during a wave of the COVID-19 pandemic.The Psychological Questionnaires for Emergent Events of Public Health (PQEEPH) was applied to investigate psychological status of medical staff and temporary workers. Multiple linear regression models were built to analyze the relevant factors affecting the psychological symptoms. Of 380 participants, women accounted for a high proportion of medical staff, and the majority of temporary workers were men. Medical staff had higher psychological symptom scores in depression, fear, neurasthenia and hypochondria than temporary workers. Multiple linear regression analysis indicated that higher risk perception and occupational exposure of medical staff were significantly related to worse psychological symptoms, and emergency management capacity was negatively correlated with psychological symptoms of medical staff. Our findings indicated that medical staff experienced more serious psychological symptoms than temporary workers during public health emergency, and protecting medical staff from psychological disturbance is of great importance to the development of medical system. Our study suggested that risk perception and protective actions should be actively improved to reduce information avoidance and develop positive psychological status, which provided scientific basis for developing psychological intervention measures when there is emergent event of public health in the future.
Yoga Pose prediction using Transfer Learning Based Neural Networks
Authors: Maddukuri Nivas , Ummity Srinivasa Rao 
Published: April 2023

Abstract
The rapid increase of the technology made human to work harder irrespective of the body condition. This has caused many people with mental pressure and lack of body fitness. Covid – 19 has also shown the serious effect on human mental health. Therefore, many physicians suggested to practice yoga for breathing and physical fitness. But it is not possible for all people to come to fitness centers in lockdown, tight work schedule, staying far from fitness centers etc. So, this research uses transfer learning approach on convolutional neural networks in order to predict the yoga posture made by the person in real – time. 85 different types of yoga postures dataset is constructed by web scrapping and by capturing the images which is more compared to existing works. Training, validation and test set were divided in the ration 70:10:20 respectively. The pre-trained models like EfficientNet – B0, Xception, ResNet – 50 and MobileNet were chosen based on their past performances and were trained on the constructed yoga dataset. The experimental results shows that, Xception model using transfer learning gave the best results with the testing accuracy of 95.67% and also second best in execution time.
Study on the Response Characteristics of Elevated Cylindrical Liquid Storage Tanks under Seismic Excitation
Authors: Ren Jiaqi , Yang Wenwei , Wang Yin 
Published: April 2023

Abstract
In seismic analysis, the undesirable mode of oscillation is determined using analytical and numerical approaches. El Centro earthquake response spectrum plot and El Centro accelerogram are used to compute the response to the seismic event and to compare the results of time-history analysis. The ANSYS software is used for all of the analyses. FE software ANSYS used spectrum and time-dependent analysis to calculate seismic response to earthquake loading. The method of response spectrum is preferable when merely considering the overall reaction of a linearly behaving structure because it requires less processing effort. Time-history analysis has the advantage of being universal. Compared to other approaches, this one has a disadvantageous computational time and convergence issues. The results of the dynamic analyses were in close agreement with one another. Regardless of the shape of the vessel, this method can be used. Additionally, slenderness characteristics can be applied to various tank shapes, such as the intze (truncated conical) or truncated intze (truncated conical). The mass, height and stiffness values of the equivalent circular tank shall be utilized. Analysis of rectangular storage tanks subjected to earthquake excitations is the focus of this study. The tank can be used both above and below ground. Predicting the natural frequencies has been done using a linear three-dimensional finite element method. The tank's height-to-length ratio, soil type, water level, and tank wall thickness are some of the variables that can be used to analyze the tank's performance. Full tanks have higher top displacement and axial force components than half-full (31%), and empty tanks (75 percent). According to the underground tank, empty tank top displacement and axial force components are higher than those in half-full (19%) and full tank circumstances (40 percent). Tank cases that are located above ground have higher base shear values than those that are located below ground (19 percent to 37 percent). Soil type 2 has a stronger shear foundation than soil type 1. (17 percent to 28 percent).
Investigation on Heat and Mass Transfer Characteristics and Parameter Design of the Maisotsenko Saturator
Authors: He Weifeng F. , Shi Qile , Adam Abdalazeem , Yao Zhaohui , Gao Yanfei , Su Pengfei , Han Dong 
Published: April 2023

Abstract
The Maisotsenko gas turbine cycle (MGTC) introduces the M-cycle in the aftercooling process, thereby adding a larger mass flow rate to the saturator. However, this imposes strict requirements on the lightweight design of the aftercooling saturator, for which detailed manufacturing information is currently scarce. This paper presents a comprehensive MGTC that combines intercooling, aftercooling, and regenerative, and considers the reuse of cooling water and energy recovery. The thermodynamic indicators are obtained by establishing energy and mass conservation models for each component. A heat and mass transfer model is developed for the aftercooling saturator, and the actual dimensions and internal temperature, relative humidity, and humidity ratio changes are calculated using the finite difference method. The response patterns of channel length to changes in parameters such as pressure ratio, dew point efficiency, and extraction ratio are analyzed. The results show that with a pressure ratio of 16, a dew point efficiency of 0.8, and an extraction ratio of 1/3, a channel length of 5.526m is required, with a corresponding channel number and total heat transfer area of 317 and 1752m2, respectively, and a thermal efficiency of 48.63%. The study provides a key thermal design scheme for the aftercooling saturator.
Based on the NF-κB signaling pathway to explore the predictive effect of DNA repair gene PARP1 on distant metastasis after Breast cancer surgery
Authors: Pan Kaiyong , Li Xiabin , He Junfang , Lei Yuqian , Yang Yongxin , Jiang Deyong , Tang Yan 
Published: April 2023

Abstract
Backgroud: To study the expression of the expression of NF-κB proteins (IKKβ, p50, p65, TNF-α) and PARP1 in patients with distant metastasis and non-metastasis after Breast cancer surgery, and analyze their correlation. Their immunohistochemical scores were used to predict their effect on postoperative distant metastases in Breast cancer patients.
Methods：Nested case-control study was used. Patients with distant metastasis in the Breast cancer follow-up cohort established in 2014 were selected as the metastasis group, while non-metastasis were selected as the control group. Immunohistochemical methods were used to detect the expression of NF-κB proteins (IKKβ, p50, p65, TNF-α) and PARP1 in the Breast cancer patients. ROC was used to analyze the predictive effect of these on distant metastasis after Breast cancer surgery. COX model was used to evaluate the effects of PARP1 and TNF-α on distant metastasis after Breast cancer surgery.
Results: (1) PARP1 was mainly expressed in the nucleus of Breast cancer cells. IKKβ, p50, p65 and TNF-α proteins were mainly expressed in the cytoplasm. And the Immunohistochemical score of them both are significantly higher in the group of distant metastasis than non-metastasis (P<0.001).(2) PARP1 was correlated with IKKβ, p50, p65 and TNF-α proteins (P<0.001). There was a correlation between IKKβ, p50, p65 and TNF-α proteins (P<0.001). (3) ROC curve showed that PARP1>6, IKKβ>4, p65>4, p50>2, TNF-α>4 had a predictive effect on distant metastasis.(SePARP1=78.4%, SpPARP1=79.4%, AUCPARP1=0.843; SeIKKβ=51.55%, SpIKKβ=64.95%, AUCIKKβ=0.591; Sep65=88.66%, Spp65=46.39%, AUCp65=0.716; Sep50=60.82%, Spp50=69.07%, AUCp50=0.6884; SeTNF-α=64.95%, SpTNF-α=70.10%, AUCTNF-α=0.709.)(4) COX analysis showed that the high expression of PARP1 and TNF-α were risk factors for distant metastasis after Breast cancer surgery (RRPARP1=4.092, 95%CI:2.475-6.080, P<0.001),(RRTNF-α=1.825, 95%CI:1.189-2.779, P=0.006).
Conclusion:(1)PARP1, IKKβ, p50, p65 and TNF-α were positively correlated with distant postoperative metastasis of Breast cancer.(2) When PARP1>6, IKKβ>4, p50>2, p65>4, TNF-α>4, it has a certain predictive effect on postoperative metastasis of Breast cancer;(3)PARP1 may regulate the effect of TNF-α on Breast cancer metastasis through NF-κB signaling pathway, providing clues for the molecular mechanism of Breast cancer metastasis.
An accelerated simulating method for flow forming process through locally and dynamically rigidifying the workpiece
Authors: Dong Yunda , Zhan Mei , Lyu Wei , Fan Xiaoguang , Zhai Zhuolei 
Published: April 2023

Abstract
Flow forming is a widely used process for manufacturing tubular parts in the aerospace and defense industries. In this process, the workpiece is produced locally and continuously under the action of mandrel and feed of roller(s), which requires a lengthy finite element simulation (FES) time. To speed up the FES, dynamic rigidifying the portion of workpiece which undergoes little or no deformation is an available method to reduce the amount of calculation. The mobile region that deforms plastically during the process can be identified based on the position of the roller(s) and then projected onto the designed workpiece to construct the rigid-flexible coupling model. This identification can be accelerated by clustering the elements of workpiece into a sequence of blocks along the axial or hoop direction, or both. Thus, the workpiece can be subdivided into blocks or simply into rigid and deformable parts along the intersections of the blocks. In addition, the partitioned workpiece is overlaid by a structured mesh to store the historical data during process and ensure accuracy. By integrating the above methods, the local and dynamic rigidification method can be applied to simulate the flow forming process via the secondary development of Abaqus. Comparing the precision and efficiency of models divided along diverse directions, the model divided along the axes has the optimal performance and can reduce the calculation time by 1/4 to 1/3. When the workpiece is cut only at the interfaces between rigid and deformable parts, the FES results for the large radius model show that rigidification performs well with large reduction.
Antioxidant potential, lipid profile and sensory attributes of a functional yogurt formulated with hydroethanolic extract of Mentha Piperita L.
Authors: Guemidi Chafika , Saada Djamal Ait , Chabane Ouiza Ait , Elmastas Mahfuz , Erenler Ramazan , Yilmaz Mustafa Abdullah , Tarhan Abbas , Akkal Salah , Khelifi Haroune 
Published: April 2023

Abstract

This study aims to quantify and identify phenolic compounds in the hydroethanolic extract of Mentha piperita L. harvested in the Algerian Sahara by colorimetric and LC-MS/MS analysis, assess its antioxidant capacity by DPPH and ABTS assays and examine the impact of its inclusion at 2 to 6% rates on sensory and oxidative properties (DPPH, ABTS, TEBARS) and the lipid profile analyzed by GC-FID in steamed yoghurt.
The extract contained 41.29 mg GAE/ml total phenolics, 22.45 mg QE/ml total flavonoids and only 0.59 mg CE/ml condensed tannins. LCMS/MS analysis detected 26 phenolic compounds, among which rosmarinic acid was the most abundant. DPPH and ABTS assays showed IC50 values of 3.18 and 2.49 mg freeze-dried extract/ml, indicating the high antioxidant potential of the examined extract. Yogurts containing 2% and 4% of this extract were well accepted by the sensory evaluation panel.
The studied extract also significantly increased the antioxidant capacity of yogurt up to 39.51% compared to natural yogurt after 20 days of refrigeration, significantly reduced lipid peroxidation and at a dose of 4%, caused a significant improvement (p<0, 01) in the omega content of yogurt, especially alpha-linolenic acid, compared to the control and caused a marked decrease (p<0. 01) in the ω-6/ω-3 ratio in yogurt from 5.21 to 4.11 on day 20 of refrigeration compared with the control. The production of a sensorially acceptable pasteurized yogurt enriched with up to 4% hydroethanol extract of Mentha piperita L. as an alternative to synthetic antioxidant additives with health-promoting properties appears feasible.
Ultrastructural modifications induced by an attenuated SARS-CoV-2-related pangolin coronavirus GX_P2V(short_3UTR) in Vero cells
Authors: Wei Lai , Che Fuyou , Lu Shanshan , Li Mengzhe , An Xiaoping , Fan Huahao , Tong Yigang , Song Lihua 
Published: April 2023

Abstract
Background Positive-strand RNA viruses, such as SARS-CoV-2, manipulate host cell endomembranes to form viral replication organelles (vROs) for replication and protection. Pangolin coronavirus GX_P2V(short_3UTR), a cell-culture-adapted SARS-CoV-2-related coronavirus with a 104-nucleotide deletion in its 3´-terminus untranslated region, is highly attenuated in both in vitro and in vivo infection models. The mechanism underlying this attenuation remains unclear.Methods Vero cells were infected with GX_P2V(short_3UTR) and analyzed using transmission electron microscopy at various time points post-infection.Results Our study demonstrated that GX_P2V(short_3UTR) enters cells via endocytosis, leading to the formation of delayed vROs, composed of double-membrane vesicle, convoluted membranes, and double-membrane spherules. These structures were only observed after 12 hours post-infection. At 24 hours post-infection, vROs were readily identifiable, including the formation of annular lamellae due to nuclear pore stacking. By 48 hours post-infection, infected cells exhibited a characteristic feature of a complex reticulovesicular network. Similar to SARS-CoV-2, GX_P2V(short_3UTR) were found to bud within endoplasmic reticulum-Golgi compartments, accumulate in autophagy-like vesicles and multivesicular bodies, and egress via the lysosomal pathway. Notably, we did not observe any large vacuoles containing highly dense viral particles, which had been reported in SARS-CoV-2-infected cells.Conclusions Pangolin coronavirus GX_P2V(short_3UTR) undergoes a typical SARS-CoV-2-like life cycle in Vero cells. The delayed formation of vROs and the sparsely populated viral vacuoles in infected cells could contribute to the attenuation of pangolin coronavirus GX_P2V(short_3UTR).