bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analisis Respon Siswa Terhadap Pengoptimalan Alat Peraga Pada Mata Pelajaran IPA Kelas V di SDN Koripan Bungkal Ponorogo
Authors: Sekar Yoga Palupi  , Wirawan Fadly  
Published: March 2024

Guru di SDN Koripan menggunakan alat peraga dalam setiap pembelajarannya terumata pada mata pelajaran IPA. Guru menggunakan alat peraga sebagai alat bantu untuk menjelaskan kepada siswa serta dapat membantu siswa memahami dan menyerap materi lebih cepat. Keunikan yang ada pada guru di SDN Koripan ialah guru tersebut membuat alat peraga sendiri ketika mengajar di depan kelas kemudian guru tersebut juga meminta siswa membuat alat peraga yang sama dengan yang dibuat oleh guru. Jadi, keunikan ini terjadi ketika ada kekurangan yang ada pada prasarana sekolah tersebut. Alat peraga yang dibuat pun lebih bervariasi dan mudah dipahami oleh siswa serta terbuat dari bahan-bahan yang mudah ditemukan di sekitar. Tentunya, bahan-bahan yang digunakan akan mudah ditemukan juga oleh siswa ketika siswa diminta untuk membuat alat peraga. alat peraga yang dibuat sendiri secara tidak langsung bisa menimbulkan rasa ingin tau siswa akan materi tentang alat peraga tersebut. Siswa secara tidak langsung juga dituntut lebih kreatif dalam mewujudkan sebuah inovasi baru terkait penggunaan alat peraga pada materi tertentu. respon siswa sangat antusias ketika guru menjelaskan materi menggunakan alat peraga. Dari hasil observasi, ditemukan fakta ketika siswa diajarkan materi menggunakan alat peraga, siswa tersebut merasa pembelajaran yang dilakukan menggunakan alat peraga lebih menyenangkan dan materi dapat terserap dengan mudah sehingga hasil belajar yang diperoleh juga memuaskan. Siswa merasa lebih percaya diri dan berani mengungkapkan pendapatnya ketika guru menjelaskan materi menggunakan alat peraga daripada hanya dijelaskan menggunakan teori saja. Penelitian ini bertujuan untuk mengetahui, mengidentifikasi, dam mendeskripsikan (1) pelaksanaan penggunaan alat peraga di dalam kelas (2) respon siswa ketika dijelaskan menggunakan alat peraga (3) keterkaitan respon siswa dengan alat peraga. Teknik analisis data yang digunakan digunakan pada penelitian ini adalah teknik wawancara, dokumentasi, dan observasi. Kemudian, subjek penelitian ini adalah guru kelas 4, 5, dan 6 serta 4 siswa kelas V sebagai informan. Berdasarkan hasil analisis data dapat diperoleh kesimpulan (1) pelaksanaan penggunaan alat peraga di dalam kelas cukup effektif terbukti ketika guru menjelaskan menggunakan alat peraga di dalam kelas siswa bisa lebih memahami dan menyerap materi lebih cepat (2) respon siswa yang antusias adalah bukti dari penggunaan alat peraga hasil belajar siswa jauh lebih meningkat dan siswa terbukti bisa berpikir kritis serta percaya diri dalam menngemukakan pendaptnya (3) Keterkaitan respon siswa dengan alat peraga adalah keberhasilan siswa dan guru dalam memahami suatu materi jika menggunakan alat peraga. Kemudian, hasil belajar siswa yang baik adalah salah satu keterkaitan antara respon siswa dengan alat peraga. Karena, ketika siswa mengungkapkan respon positif terhadap materi otomatis siswa memahami materi yang diajarkan oleh guru.
Tackling the Operational Challenges of Sour Produced Water Treatment and Disposal
Authors: Alzaabi Alya Jasem , Ray Tapas Nitaipada , Inamdar Sameer 
Published: March 2024

Abstract
Treating produced water in Upstream Oil and Gas industry is challenging due to high H2S and salt content, presence of temperature-sensitive salts and acidic components. Conventional H2S stripping technologies like reboiled stripping used in downstream facilities need extensive review before applying them in Upstream due to propensity for scaling at high temperature. This paper discusses the several challenges faced in the newly installed Produced Water Treatment (PWT) Unit, to treat sour produced water to the specification of disposal into aquifers and how they were overcome to maintain Business continuity.
Problems faced include severe corrosion in carbon steel piping and components of treated water circuit, hydrocyclones under-performance, frequent filter choking (present downstream of hydrocyclones), and salt/scale deposition in the high temperature reboiler section. This caused frequent shutdown of the system, reducing the unit's availability and impacting oil production target. To identify the root causes and recommend mitigation measures, design data was collected, and deviations were established with respect to design basis. Sampling and analysis for water characterization including pH, suspended solids, oil and oxygen content, bacteria, deposits, and metallurgical failures were carried out. Studies including process, corrosion were conducted by the Original Equipment Manufacturer (OEM).
The severely corroded carbon steel sections were found to be due the Low pH (&lt;4.5), against the design value of pH 6.5, caused by the Oxygen scavenger injected upstream and the presence of Volatile Fatty Acids (VFAs). To maintain the pH, Alkali dosing downstream the stripper is considered as a low-cost solution. The hydrocyclone under performance was due to high oil content (&gt; 5000 mg/l) in feed, compared to design (2500 mg/l), low feed rate (below turn-down) and feed flow variation. These were overcome by adjusting interface levels in upstream separators, changing demulsifier and dosage rate, reducing flow variation through control loops tuning and providing recycle line. As for the frequent filter choking, the main reason is the higher oil content due to hydrocylone underperformance, biofilm formation and wrong cartridge selection (20-micron instead of 70-100 micron acceptable to downstream stripper/disposal well). Improvement in hydrocyclone performance and change in cartridge mesh size resolved the problem to manageable level.
Salt/scale deposits were mainly due to high salinity of water and high temperature as a result of reboiled stripping. Mode of operation was changed to cold stripping with fuel gas taking the advantage of low pH in the system. To maintain the low pH in the system, acid was added whenever required along with caustic injection in treated water to avoid costly CRA material, which was found to be a cost-effective solution.
Evaluation of Interventions in Online Grocery Shopping for Sustainability and Health: An Adaptive Design Randomized Controlled Trial
Authors: Bentil Helena , Oyebode Oyinlola , Rens Thijs van 
Published: March 2024

Abstract
Effective interventions are needed to promote more sustainable and healthier food choices for both human and planetary health. This study will evaluate two interventions in two independent adaptive design randomised controlled trials (one 2-arm and one 3-arm trial) within the same study population (a factorial design is not powered). The interventions are (i) eco-labelling, which will provide participants with information on the environmental impact of their food purchases using a score ranging from A (most sustainable) to G (least sustainable); and (ii) price discounts on alternative products with a better sustainability profile (and equal or better nutritional profile) in place of specific products in their basket. To implement these interventions, we will use a browser extension on online shopping websites for one or multiple large UK supermarkets, accessed using the Google Chrome browser on a desktop or laptop computer. We will assess the effect of these interventions on the average eco-score of the basket (primary outcome) as well as its nutritional content (secondary outcome). Health outcomes of the intervention will be modelled using nutrition scores.
Incidence and Predictors of Post-operative Hypoxemia in Pediatric Patients Undergoing General Anesthesia: a Single-arm Prospective Multi-center Cohort Study 2023
Authors: Mengistu Semon , Mulugeta Haile Mariam , Destaw Belete , Molla Simeneh 
Published: March 2024

Abstract
Background: Pediatrics use more oxygen than adults do, which has an impact on how quickly the body desaturates after an apnea. Depending on age and other physiological parameters, the clinically relevant hypoxemia in pediatric patients can drop to 40% in as little as 1.5 minutes, which makes the transfer to the Post-Anesthesia Care Unit (PACU) a risky phase. Postoperative hypoxemia (POH) happens critically postoperatively and various factors predict POH. The objective of the study is to determine the incidence and predictors of POH in pediatric patients undergoing general anesthesia (GA) at Hawassa University Comprehensive Specialized Hospital (HUCSH), Saint Peter Specialized Hospital, and Tikur Anbessa Specialized Hospital (TASH)
Methodology: In 292 pediatric patients, a single-arm prospective multi-center cohort study using systematic random sampling was carried out. Data entry and analysis were performed using Statistical Package for Social Sciences (SPSS) version 25.00 software. For logistic regression, a Hosmer-Lemeshow goodness of fit test was used (variables with a p > 0.05 were considered fit). Binomial logistic regression and multivariable analysis were performed. Independent variables were examined for multicollinearity, and those exhibiting a variance inflation factor (VIF) > 10 were removed. Additionally, the association between the variables was determined using Pearson chi-square, and p < 0.05 indicated statistically significant variables.
Results: The incidence of POH was 47.9%. Pediatric age (≤ 2 years), opioids, and above-abdominal surgeries are associated with POH (p = < 0.001) and AOR = 3.263 (1.686–6.314), 5.545 (2.983–10.307), and 3.642 (1.969–6.736), respectively. Additionally, the presence of at least one comorbidity, use of muscle relaxants, prolonged anesthesia, and surgery duration are associated with POH (p = 0.001, 0.003, 0.02, and 0.037) and AOR = 4.259 (1.788–10.145), 29.72 (3.262–270.778), 2.153 (1.131–4.1), and 2.560 (1.058–6.196), respectively. However, anesthesia type is insignificantly associated with POH (p = 0.096).
Conclusion:The incidence of POH in pediatric patients undergoing GA is high, and the presence of at least one comorbidity, pediatric age (≤ 2 years), use of opioids and muscle relaxants, above-abdominal surgeries, prolonged anesthesia, and surgery durations are significantly associated with POH. We recommend taking precautions, following them and having oxygen therapy for these high-risk pediatric patients.
Complexity in palliative care inpatients: prevalence and relationship with provision of care, a retrospective study
Authors: Schutzbach Kevin , Corminboeuf Yann , Wild Beate , Schellberg Dieter , Stiefel Friedrich 
Published: March 2024

Abstract

Context:
Palliative car aims to provide comprehensive care, since end of life can be marked by somatic, psycho-social and spiritual distress, requiring interdisciplinary care. However, interdiscoplinary care is costly, and palliative care services, as all other medical services, get under pressure to be as cost-effective as possible.
Objectives
To describe the case complexity of palliative care inpatients, to evaluate possible correlations between complexity and provision of care and to identifycomplexity subgroups.
Methods
Patients (N = 222) hospitalized in a specialized palliative care unit (Switzerland) were assessed regarding their biopsychosocial case complexity by means of the INTERMED. Based on a chart review, INTERMED scores were determined at admission and the end of hospitalization/death. Descriptive statistics and Pearson correlation coefficients were estimated for the association between biopsychosocial case complexity and amount and type of care provided. A principal component analysis (PCA) was conducted to explain variance and to identify patient subgroups.
Results
Almost all patients (98.7 %) qualified as complex as indicated by the INTERMED. Provision of care correlated positively (r=0.23, p=0.0008) with the INTERMED scores upon admission. The change of INTERMED score during stay correlated negatively with provided care (r=-0.27, p=0.0001). PCA performed with two factors explained 49% of the total variance and identified two subgroups which differed regarding the psychosocial item scores of the INTERMED.
Conclusion
Specialized palliative care inpatients show the highest complexity score of all populations assessed up to now with the INTERMED. Correlations between biopsychosocial complexity and care provided, and between care and decrease of complexity scores, can be considered as an indicator for care efficiency. Patient subgroups with specific needs (psychosocial burden) suggest that palliative care teams need specialized staff.
Trial registration
The study was accepted August 24, 2023 by the ethics committee of the Canton of Vaud (CER-VD 2023-01200).
Analysis of early death in critically ill patients with acute promyelocytic leukaemia in HICU
Authors: Li Haitao , Zhang Yingmei , Fan Shengjin , Li Dandan , Zhang Qian , Fu Jinyue , Lu Dongxue , Ji Jiajuan , Li Yinghua 
Published: March 2024

Abstract

This study was conducted to identify the characteristics and risk factors for early death of the critically ill acute promyelocytic leukaemia (APL) patients in Hemato-oncologyical ICU (HICU). A total of 44 APL patients from 2017 to 2023 were recruited. The mortality of APL patients in HICU was high (27/44, 61.36%). In comparison to patients who survived, nonsurvivors had longer PT (P = 0.02), lower FIB (P = 0.004), and higher WBC (P = 0.004) at hosipital admission. Severe bleeding was the most frequent complication (34 cases, 77.27%), which occurred either pre-induction or on day 5 (IQR, 3-7.5 days) of induction therapy. The leading cause of death was fatal hemorrhage (18 cases, 40.90%), which occurred either pre-induction or on day 4 (IQR, 3–7 days) of induction therapy. In conclusion, the primary cause of mortality for APL patients in the HICU was fatal bleeding, whereas patients who experienced severe bleeding were more likely to die from secondary infection.
Risk factors and global prevalence of Neovascular age-related macular degeneration: protocol for a systematic review and meta-analysis
Authors: Ling Juan , Zhang Huazhi , Glujovsky Demián , Xie Zhuo-Lin , Wang Yan , Esoimeme Gloria , Luo Xiang-Xia 
Published: March 2024

Abstract
Background: Neovascular age-related macular degeneration (nAMD) is the most prevalent cause of blindness among individuals over 50 years old in developed countries. nAMD can result in vision loss due to the degeneration of the retinal pigment epithelium or the formation of abnormal blood vessels called choroidal neovascular membranes (CNVM) beneath the macula. These CNVM can leak fluid and blood, leading to the formation of a scar that can cause severe vision impairment.
Methods: A comprehensive search was conducted on various databases including PubMed, Cochrane Library, Web of Science, Embase, OVID MEDLINE, China National Knowledge Infrastructure (CNKI), Wanfang, Chinese Biomedicine Literature Database (CBM-SinoMed), and VIP to gather research literatures on the risk factors and global prevalence of nAMD. The search strategy Headings (MeSH) terms and free-text terms, and Stata12.0 software was utilized for meta-analysis of the collected data.
Results: This study is ongoing and the results will be submitted to a peer-reviewed journal for publication.
Ethics and dissemination: Ethical approval is not applicable, since this is an overview based on published articles.
Protocol registration number: CRD42023470864
Investigation into the early modification of left ventricular mass following mitral valve replacement and the development of a nomogram prediction model
Authors: Wu Song-zhe , Xia Lin , Wei Tao , Niu Tian-yu , Zhu Yan 
Published: March 2024

Abstract

Background
Mitral valve disease caused by rheumatic heart disease and mitral valve disease caused by degenerative valvular disease are common types of mitral valve disease. Mitral valve replacement surgery (MVR) is an effective treatment for mitral regurgitation. This study observed the changes of left ventricular mass (LVM) and other indicators through mitral valve lesions caused by different types of lesions, and further observed the changes of LVM and other indicators after MVR. The effects of preoperative LVM and other indicators on postoperative ejection fraction reduction in patients with MVR were described, and the model was established as a risk factor.
Method
A retrospective study was conducted on the baseline data and perioperative echocardiographic data obtained during hospitalization of 80 patients with rheumatic or degenerative mitral valve disease from September 2022 to March 2023. The patients were divided into two groups, group A and Group B, according to the relevant perioperative indicators obtained by LVM, left ventricular mass index (LVMI) and relative ventricular wall thickness (RWT). Group A (rheumatic heart disease, n = 50) and group B (degenerative valvular disease, n = 30). The changes of left ventricle in two groups were observed. Then, the risk factors affecting the reduction of ejection fraction (EF) 3 months after surgery were screened by univariate and multivariate Logistic regression analysis, and the corresponding risk prediction model was established by using RStudio, and the model was evaluated and verified.
Results
The preoperative LVM, LVMI, left ventricular volume and left ventricular size in group A were lower than those in group B, and the differences were statistically significant (P < 0.05); The LVM, LVMI, left ventricular volume and left ventricular size of the whole patients at 1 week and 1 month after surgery were all regression compared with those before surgery, and the differences were statistically significant (P < 0.05); There were no significant changes in LVM, left ventricular volume and left ventricular size 3 months after surgery compared with 1 month after surgery (P > 0.05).Logistic regression analysis showed that left atrial diameter and left ventricular end-diastolic diameter, LVM and serum creatinine were independent risk factors for postoperative EF decline (P < 0.05).
A novel approach: exploring the potential of retinal thickness and microvascular alterations for diagnosing cirrhosis
Authors: Li YIbin , Zou Jie , Jin Xiaobing , Yang Siqi , Li Ming , SHAO YI 
Published: March 2024

Abstract
Background: The objective of this study was to investigate the correlation between fundus alterations and cirrhosis through the use of optical coherence tomography angiography (OCTA).
Methods: This study involved 17 patients with cirrhosis (34 eyes) and 17 healthy controls (HCs; 34 eyes). The OCTA fundus data were segmented into various layers and regions and categorized according to the subzones of the Early Treatment Diabetic Retinopathy Study for comparison.
Results: Patients with cirrhosis had a lower full retinal thickness (RT) in the IS, OS, and ON regions than did healthy controls (HCs) (P < 0.001), and the RT was also lower in the IN and central regions (p<0.05). Additionally, the inner layer RT was lower in the IS, OS, IT, and OT regions in patients with cirrhosis (P < 0.05), and the outer layer RT was lower in the IS, IN, and ON regions in patients with cirrhosis than in HCs (P < 0.05). The ROC curve of the inner RT of the IS region showed a greater sensitivity to the pathological changes associated with the disease, with an AUC of 0.9324 (95% CI: 0.8665-0.9983). Furthermore, compared with HCs, patients with cirrhosis exhibited significantly lower superficial vessel density (SVD) in the IS, OS, IT, and OT regions (P < 0.001) and lower SVD density in the ON and central regions (P < 0.05). The AUC for the IT region was 0.9429 (95% CI: 0.8928–0.9930), indicating good diagnostic sensitivity.
Conclusion: The RT and SVD of specific subregions in the macular retina of patients with cirrhosis were lower than those in the macular retina of HCs. OCTA measurement could be a valuable aid for imaging in cirrhosis patients.
Optimizing geophysical anomaly detection using combined electrode arrays through image processing
Authors: Yousefi Mohammadreza , Zarinjoy Mohamad Ghayeghi 
Published: March 2024

Abstract
The use of a single electrode array in geophysical surveys can lead to increased uncertainty in anomaly detection. To address this, we took advantage of image processing to produce a wide range of data from a limited one and subsequently enhance data manipulation capabilities. Three geophysical anomalies—rectangle block, dyke, and fault—were modelled using four typical electrode arrays (Wenner, Pole-Pole, Dipole-Dipole, and Schlumberger) with RES2DMOD software. The synthetic data were then inverted using RES2DINV software. Python software facilitated the conversion of inverted resistivity models from RGB to real resistivity values, enabling the application of various statistical approaches. We plotted the resistivity sections using the reconstructed data to ensure that our conversion procedure was correct. Next, the resulting models were evaluated using mean resistivity value (MRV), mean absolute error (MAE), and mean absolute percentage error (MAPE) criteria. Our study revealed that combined models outperformed individual arrays in detecting underground anomalies. However, increasing the number of electrode arrays combined does not necessarily give rise to an ideal result. By identifying and eliminating an electrode array that significantly deviated from real resistivity values, new combined models were plotted. In all three models, we can see that three combined electrode arrays provided more accurate results than the four conventional ones if the less relevant array was properly recognized.
Synergistic effect of RGO loaded Al2O3 on microstructure and mechanical properties of 6061 aluminium alloy
Authors: Wang Hongding , Zheng Haitao , Hu Mingshuai , Ma Zhonglei , Liu Hong 
Published: March 2024

Abstract
Al6061 alloy matrix composites reinforced with nano-reduced graphene oxide loaded Al2O3 (Al2O3/RGO) were successfully fabricated using high energy ball milling and hot extrusion techniques, with varying mass fractions. The microstructures of these Al2O3/RGO/Al6061 aluminium matrix composites (Al MMCs) were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) attached with energy-dispersive X-ray spectroscopy (EDS), and transmission electron microscope (TEM). The tensile properties and Vickers hardness of the alloy were tested. The results show that Al2O3/RGO were uniformly distributed in the Al6061 matrix and tightly bonded to the matrix. Al2O3 encapsulation on RGO surface eliminates Al4C3 brittle phase in matrix, indicating that there was no reaction between the reinforcement and the matrix Al6061. The tensile strength and vickers hardness of Al MMCs increased after Al2O3/RGO were added. Tensile tests revealed that the yield strength and tensile strength of Al MMCs with a 0.1 wt.% reinforcement were 49% and 43% higher, respectively, compared to pure Al6061 prepared under the same process. And the alloys showed the best strength and considerable plastic deformation capability for that of 0.1 wt.% Al2O3/RGO.
Design of CMOS 45nm SAR ADC for ECG Signal Applications
Authors: Pradeep Jinka , Ramashri Tirumala 
Published: March 2024

Abstract

Research demonstrates the efficacy of utilizing an 8-bit CMOS 45nm SAR-ADC for acquiring biomedical signals efficiently. The study proposes incorporating a DAC to enhance energy efficiency at the nanowatt level, facilitating zero energy consumption comparisons and significantly improving energy utilization. Notably, optimizing the comparator by adjusting transistor sizes obviates the need for specific offset-canceling methods. Leveraging the 45nm CMOS technological node, the SAR-ADC architecture achieves impressive performance, boasting an SFDR of 64.12 dB while consuming only 1.89uW of power. Operating at a sampling frequency of 1.1MHz and a voltage supply of 1V, these results underscore the effectiveness of the implemented design.