High-sensitivity optical temperature measurement has attracted extensive attention in both fundamental studies and practical applications. In this study, a series of upconversion (UC) luminescence phosphors composed of NaGd(PO3)4 (NGP) doped with 20 at% Yb3+ and various concentrations of Er3+ (0.5 at% as the optimal concentration) was synthesized by high-temperature solid-state method. And their crystal structure and the distribution of lanthanide dopants were analyzed using X-ray diffraction with Rietveld refinement verifies. Under 980 nm laser excitation, the obtained phosphors show the characteristic Er3+ upconversion green and red emission bands through two-photon processes. The fluorescence intensity ratio (FIR) based on the thermal coupled states demonstrates the thermal sensing ability in a wide temperature range of 200-573 K. The thermal sensitivity is relatively high with the maximum absolute thermal sensitivity Sa of 0.53 % K-1 (523 K) and the maximum relative thermal sensitivity Sr of 2.60 % K-1. The phosphor NGP:Yb/Er also exhibits high repeatability as the thermal sensors reach 97 %. These findings postulate the potential of NGP:Yb/Er as a promising candidate in optical thermal sensing applications.
高灵敏度光学温度测量在基础研究和实际应用中都引起了广泛关注。本研究采用高温固态法合成了一系列由掺杂 20%Yb3+ 和不同浓度 Er3+(0.5% 为最佳浓度)的 NaGd(PO3)4(NGP)组成的上转换(UC)发光荧光粉。利用 X 射线衍射和里特维尔德细化验证分析了它们的晶体结构和镧系掺杂物的分布。在 980 nm 激光激发下,所获得的荧光粉通过双光子过程显示出特征性的 Er3+ 上转换绿色和红色发射带。基于热耦合态的荧光强度比(FIR)证明了该荧光粉在 200-573 K 宽温度范围内的热感应能力,其热灵敏度相对较高,最大绝对热灵敏度 S a 为 0.53 % K-1 (523 K),最大相对热灵敏度 S r 为 2.60 % K-1。荧光粉 NGP:Yb/Er 还具有很高的重复性,热传感器的重复性达到 97%。这些发现表明,NGP:Yb/Er 有潜力成为光学热感应应用中的理想候选材料。
{"title":"Upconversion luminescence and thermosensitive properties of NaGd(PO<sub>3</sub>)<sub>4</sub>:Yb<sup>3+</sup>/Er<sup>3</sup>.","authors":"Jintao Xu, Shanlin Zhu, Canyuan Liao, Weijun Zhao, Xingyuan Zhong, Zijun Wang, Jiuping Zhong","doi":"10.1016/j.heliyon.2024.e39951","DOIUrl":"10.1016/j.heliyon.2024.e39951","url":null,"abstract":"<p><p>High-sensitivity optical temperature measurement has attracted extensive attention in both fundamental studies and practical applications. In this study, a series of upconversion (UC) luminescence phosphors composed of NaGd(PO<sub>3</sub>)<sub>4</sub> (NGP) doped with 20 at% Yb<sup>3+</sup> and various concentrations of Er<sup>3+</sup> (0.5 at% as the optimal concentration) was synthesized by high-temperature solid-state method. And their crystal structure and the distribution of lanthanide dopants were analyzed using X-ray diffraction with Rietveld refinement verifies. Under 980 nm laser excitation, the obtained phosphors show the characteristic Er<sup>3+</sup> upconversion green and red emission bands through two-photon processes. The fluorescence intensity ratio (FIR) based on the thermal coupled states demonstrates the thermal sensing ability in a wide temperature range of 200-573 K. The thermal sensitivity is relatively high with the maximum absolute thermal sensitivity <i>S</i> <sub><i>a</i></sub> of 0.53 % K<sup>-1</sup> (523 K) and the maximum relative thermal sensitivity <i>S</i> <sub><i>r</i></sub> of 2.60 % K<sup>-1</sup>. The phosphor NGP:Yb/Er also exhibits high repeatability as the thermal sensors reach 97 %. These findings postulate the potential of NGP:Yb/Er as a promising candidate in optical thermal sensing applications.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39951"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11566698/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142647749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29eCollection Date: 2024-11-15DOI: 10.1016/j.heliyon.2024.e39925
Tanvir Hassan Tusher, Khondaker Sakil Ahmed, Saleh Bin Ibrahim Sarker
The pertinence of recycled brick aggregate (RBA) in concrete structures largely depends on their bonding ability with the rebars. Considering the practical detailing of concrete structures where main rebars are usually confined by stirrups, this study conducted bending pullout tests on 12 beam specimens to study the influence of concrete confinement on the bond behavior of rebar in RBA concrete. The investigated variables include RBA%, rebar diameter (d), embedment length (le ), and the ratio of concrete cover to rebar diameter (c/d). Bond stress-slip relationships were acquired, analyzed, and average bond strengths were compared to the AS 3600, CEB-FIP codes, and existing MacGregor's model. The average bond strength of confined specimens was nearly double that of the unconfined specimens. A progressive increase in bond strength was noticed with the presence of RBA regardless of confinement. The confined specimens also exhibited higher deformability, ductility, and toughness values than those of the unconfined beams. At 15% RBA content, the maximum toughness value of the confined specimen was 3078.1 J, while the unconfined specimens reached a value of 278.1 J, only. Similarly, the ductility of the confined beam was found in a range of 1.21-1.60 whereas the value is only 1.04-1.10 for the unconfined cases. Moreover, the confined specimens exhibited a significant number of cracks during their failure, while the unconfined specimens experienced a split type brittle failure. Nevertheless, these findings may contribute to the further development of the bond behavior of rebar in RBA-based concrete structures and thus play a role in the sustainability of construction materials.
{"title":"Bond behavior of confined rebar in recycled brick aggregate concrete using bending pullout test.","authors":"Tanvir Hassan Tusher, Khondaker Sakil Ahmed, Saleh Bin Ibrahim Sarker","doi":"10.1016/j.heliyon.2024.e39925","DOIUrl":"10.1016/j.heliyon.2024.e39925","url":null,"abstract":"<p><p>The pertinence of recycled brick aggregate (RBA) in concrete structures largely depends on their bonding ability with the rebars. Considering the practical detailing of concrete structures where main rebars are usually confined by stirrups, this study conducted bending pullout tests on 12 beam specimens to study the influence of concrete confinement on the bond behavior of rebar in RBA concrete. The investigated variables include RBA%, rebar diameter (<i>d</i>), embedment length (<i>l<sub>e</sub></i> ), and the ratio of concrete cover to rebar diameter (<i>c/d</i>). Bond stress-slip relationships were acquired, analyzed, and average bond strengths were compared to the AS 3600, CEB-FIP codes, and existing MacGregor's model. The average bond strength of confined specimens was nearly double that of the unconfined specimens. A progressive increase in bond strength was noticed with the presence of RBA regardless of confinement. The confined specimens also exhibited higher deformability, ductility, and toughness values than those of the unconfined beams. At 15% RBA content, the maximum toughness value of the confined specimen was 3078.1 J, while the unconfined specimens reached a value of 278.1 J, only. Similarly, the ductility of the confined beam was found in a range of 1.21-1.60 whereas the value is only 1.04-1.10 for the unconfined cases. Moreover, the confined specimens exhibited a significant number of cracks during their failure, while the unconfined specimens experienced a split type brittle failure. Nevertheless, these findings may contribute to the further development of the bond behavior of rebar in RBA-based concrete structures and thus play a role in the sustainability of construction materials.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39925"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11570301/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142667747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29eCollection Date: 2024-11-15DOI: 10.1016/j.heliyon.2024.e39963
Eshet Lakew Tesfaye, T Bayih
Garlic (Allium sativum L.) has both culinary and medical applications. However, the low and uneven nutrient availability in the soil frequently limits the garlic yield. This study aimed to select adaptable garlic varieties under greenhouse conditions using a pot of soil taken from Awada and Wondo Genet and to identify the optimum rates of the newly introduced mineral nitrogen, phosphorus, and sulfur (NPS) fertilizer on the growth, yield, and yield parameters of the crop. Four garlic varieties; Bishoftu Nech, Tsedey 92, Kuriftu, and local variety were used and treated with four levels of NPS (0-0-0, 78.75-69-12.75, 105-92-17, and 131.25-115-21.25 kg ha-1). The experiment was triplicated and conducted with a randomized complete block design (RCBD). Growth characteristics of the four garlic varieties were evaluated, including days to 50 % emergence, plant height, leaf number per plant, leaf length, fresh weight, dry weight, average bulb weight, and total bulb yield. The findings of this study indicated that the growth, yield, and yield parameters of all four garlic varieties from Awada soil rose as the rates of NPS increased. However, all growth and production parameters of the four garlic varieties gradually fell, starting from the blanket recommendation from Wondo Genet soil. According to this research, the usage of NPS at the rate of (131.25-115-21.25 kg ha-1) resulted in improved growth in Awada soil. Similarly, the rate of (78.75-69-12.75 kg ha-1) was optimum at Wondo Genet soil. In conclusion, determining the optimum rates of the NPS is essential to increase garlic productivity.
{"title":"Impact of NPS rates on growth and yield of garlic (<i>Allium sativum</i> L.) varieties in greenhouse.","authors":"Eshet Lakew Tesfaye, T Bayih","doi":"10.1016/j.heliyon.2024.e39963","DOIUrl":"10.1016/j.heliyon.2024.e39963","url":null,"abstract":"<p><p>Garlic (<i>Allium sativum</i> L.) has both culinary and medical applications. However, the low and uneven nutrient availability in the soil frequently limits the garlic yield. This study aimed to select adaptable garlic varieties under greenhouse conditions using a pot of soil taken from Awada and Wondo Genet and to identify the optimum rates of the newly introduced mineral nitrogen, phosphorus, and sulfur (NPS) fertilizer on the growth, yield, and yield parameters of the crop. Four garlic varieties; Bishoftu Nech, Tsedey 92, Kuriftu, and local variety were used and treated with four levels of NPS (0-0-0, 78.75-69-12.75, 105-92-17, and 131.25-115-21.25 kg ha<sup>-1</sup>). The experiment was triplicated and conducted with a randomized complete block design (RCBD). Growth characteristics of the four garlic varieties were evaluated, including days to 50 % emergence, plant height, leaf number per plant, leaf length, fresh weight, dry weight, average bulb weight, and total bulb yield. The findings of this study indicated that the growth, yield, and yield parameters of all four garlic varieties from Awada soil rose as the rates of NPS increased. However, all growth and production parameters of the four garlic varieties gradually fell, starting from the blanket recommendation from Wondo Genet soil. According to this research, the usage of NPS at the rate of (131.25-115-21.25 kg ha<sup>-1</sup>) resulted in improved growth in Awada soil. Similarly, the rate of (78.75-69-12.75 kg ha<sup>-1</sup>) was optimum at Wondo Genet soil. In conclusion, determining the optimum rates of the NPS is essential to increase garlic productivity.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39963"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11564017/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142647915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29eCollection Date: 2024-11-15DOI: 10.1016/j.heliyon.2024.e39923
Jungran Kim, Bonha Koo, Hyoung-Goo Kang
The financial consumer protection laws in South Korea emphasize the principle of suitability to ensure the well-being of the financial consumer. To adhere to these regulations, financial institutions utilize the behavioral risk assessment (BRA) form to assess investors' characteristics. This study evaluates the effectiveness of these forms in capturing investor risk propensities, using Economic Risk Attitude (ERA), Instrumental Risk-Taking (IRT), and Stimulating Risk-Taking (SRT) as comparative benchmarks. Unlike previous research focused mainly on financial risk attitudes, this study introduces a multidimensional approach that includes psychological factors like SRT, offering a more comprehensive understanding of investor behavior. Findings reveal that while BRA assessments correlate with ERA and IRT, they fail to capture the excitement-driven aspects of risk propensity represented by SRT, indicating that BRA forms may inadequately reflect investors' risk profiles. This underscores the need for refining BRA forms by integrating psychological risk factors, advocating for a multidimensional framework that enhances consumer protection and enables more tailored investment strategies. The study contributes actionable insights for financial consumer protection and sets the stage for integrating advanced technologies, such as AI, to further refine risk assessments.
韩国的金融消费者保护法强调适当性原则,以确保金融消费者的福祉。为了遵守这些法规,金融机构利用行为风险评估表(BRA)来评估投资者的特征。本研究以经济风险态度(ERA)、工具性风险承担(IRT)和刺激性风险承担(SRT)为比较基准,评估了这些表格在捕捉投资者风险倾向方面的有效性。与以往主要关注金融风险态度的研究不同,本研究引入了包括 SRT 等心理因素在内的多维方法,从而更全面地了解投资者行为。研究结果表明,虽然 BRA 评估与 ERA 和 IRT 相关,但它们未能捕捉到 SRT 所代表的风险倾向中的兴奋驱动因素,这表明 BRA 表格可能无法充分反映投资者的风险状况。这强调了通过整合心理风险因素来完善 BRA 表格的必要性,倡导建立一个多维框架,以加强对消费者的保护,并制定更有针对性的投资策略。本研究为金融消费者保护提供了可操作的见解,并为整合人工智能等先进技术进一步完善风险评估奠定了基础。
{"title":"Limitations of the investor information confirmation form in capturing investor risk propensity.","authors":"Jungran Kim, Bonha Koo, Hyoung-Goo Kang","doi":"10.1016/j.heliyon.2024.e39923","DOIUrl":"10.1016/j.heliyon.2024.e39923","url":null,"abstract":"<p><p>The financial consumer protection laws in South Korea emphasize the principle of suitability to ensure the well-being of the financial consumer. To adhere to these regulations, financial institutions utilize the behavioral risk assessment (BRA) form to assess investors' characteristics. This study evaluates the effectiveness of these forms in capturing investor risk propensities, using Economic Risk Attitude (ERA), Instrumental Risk-Taking (IRT), and Stimulating Risk-Taking (SRT) as comparative benchmarks. Unlike previous research focused mainly on financial risk attitudes, this study introduces a multidimensional approach that includes psychological factors like SRT, offering a more comprehensive understanding of investor behavior. Findings reveal that while BRA assessments correlate with ERA and IRT, they fail to capture the excitement-driven aspects of risk propensity represented by SRT, indicating that BRA forms may inadequately reflect investors' risk profiles. This underscores the need for refining BRA forms by integrating psychological risk factors, advocating for a multidimensional framework that enhances consumer protection and enables more tailored investment strategies. The study contributes actionable insights for financial consumer protection and sets the stage for integrating advanced technologies, such as AI, to further refine risk assessments.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39923"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11566688/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142647249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29eCollection Date: 2024-11-15DOI: 10.1016/j.heliyon.2024.e39946
Huaguo Zhao, Licheng Ni
Objective: Mendelian randomization (MR) was employed to explore the potential causal relationship between liposomes (LP) and rheumatoid arthritis (RA), with a focus on the mediating roles of immune cells (IC).
Methods: By screening public GWAS data, LP were used as exposure data, RA as outcome data, and IC as mediating factors. The Inverse Variance Weighted (IVW) method was the main analytical technique used in this paper to evaluate causal effects. Additional techniques included the MR-Egger, weighted median, weighted mode, and simple mode methods. Cochran's Q and MR-Egger were utilized for heterogeneity and multi-effect analysis.
Results: Phosphatidylcholine was revealed to enhance the risk of RA by MR analysis (P = 0.013, OR = 1.073, 95%CI = 1.015-1.136). There was no strong evidence that RA could affect liposome changes (IVW: P = 0.705, OR = 0.992, 95%CI = 0.952-1.034). The IVW method showed that increased levels of phosphatidylcholine were notably linked to higher levels of Double-Negative Autoreactive Cells (CD4-CD8-, DNAC) (P = 0.006, OR = 1.152, 95%CI = 1.041-1.276). The IVW approach showed that increased levels of DNAC were substantially linked to a higher risk of RA (P = 0.001, OR = 1.105, 95%CI = 1.041-1.173). Of the genetically predicted liposomes mediated by DNAC, 19.2 % were found.
Conclusion: The present work established a causal association between LP and RA, and identified a potential mediating influence of IC. However, the specific mechanism of LP triacyl-glycerol and IC on RA is still unclear, and further research is needed.
目的:采用孟德尔随机法(MR)探讨脂质体(LP)与类风湿性关节炎(RA)之间的潜在因果关系,重点关注免疫细胞(IC)的中介作用:方法:通过筛选公开的 GWAS 数据,将 LP 作为暴露数据,RA 作为结果数据,IC 作为中介因子。本文使用的主要分析技术是反方差加权法(IVW),用于评估因果效应。其他技术包括 MR-Egger、加权中位数、加权模式和简单模式法。Cochran's Q和MR-Egger用于异质性和多效应分析:通过 MR 分析发现,磷脂酰胆碱可增加罹患 RA 的风险(P = 0.013,OR = 1.073,95%CI = 1.015-1.136)。没有强有力的证据表明 RA 会影响脂质体的变化(IVW:P = 0.705,OR = 0.992,95%CI = 0.952-1.034)。IVW 方法显示,磷脂酰胆碱水平的升高与双阴性自反应细胞(CD4-CD8-,DNAC)水平的升高明显相关(P = 0.006,OR = 1.152,95%CI = 1.041-1.276)。IVW方法显示,DNAC水平升高与RA风险升高密切相关(P = 0.001,OR = 1.105,95%CI = 1.041-1.173)。在由 DNAC 介导的基因预测脂质体中,发现了 19.2%:本研究确立了 LP 与 RA 之间的因果关系,并确定了 IC 的潜在中介影响。然而,LP 三酰甘油和 IC 对 RA 的具体影响机制尚不清楚,需要进一步研究。
{"title":"Role of double-negative autoreactive cells (CD4<sup>-</sup>CD8<sup>-</sup>) in phosphatidylcholine-mediated rheumatoid arthritis: A Mendelian randomization study.","authors":"Huaguo Zhao, Licheng Ni","doi":"10.1016/j.heliyon.2024.e39946","DOIUrl":"10.1016/j.heliyon.2024.e39946","url":null,"abstract":"<p><strong>Objective: </strong>Mendelian randomization (MR) was employed to explore the potential causal relationship between liposomes (LP) and rheumatoid arthritis (RA), with a focus on the mediating roles of immune cells (IC).</p><p><strong>Methods: </strong>By screening public GWAS data, LP were used as exposure data, RA as outcome data, and IC as mediating factors. The Inverse Variance Weighted (IVW) method was the main analytical technique used in this paper to evaluate causal effects. Additional techniques included the MR-Egger, weighted median, weighted mode, and simple mode methods. Cochran's Q and MR-Egger were utilized for heterogeneity and multi-effect analysis.</p><p><strong>Results: </strong>Phosphatidylcholine was revealed to enhance the risk of RA by MR analysis (P = 0.013, OR = 1.073, 95%CI = 1.015-1.136). There was no strong evidence that RA could affect liposome changes (IVW: P = 0.705, OR = 0.992, 95%CI = 0.952-1.034). The IVW method showed that increased levels of phosphatidylcholine were notably linked to higher levels of Double-Negative Autoreactive Cells (CD4<sup>-</sup>CD8<sup>-</sup>, DNAC) (P = 0.006, OR = 1.152, 95%CI = 1.041-1.276). The IVW approach showed that increased levels of DNAC were substantially linked to a higher risk of RA (P = 0.001, OR = 1.105, 95%CI = 1.041-1.173). Of the genetically predicted liposomes mediated by DNAC, 19.2 % were found.</p><p><strong>Conclusion: </strong>The present work established a causal association between LP and RA, and identified a potential mediating influence of IC. However, the specific mechanism of LP triacyl-glycerol and IC on RA is still unclear, and further research is needed.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39946"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11570481/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142667859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29eCollection Date: 2024-11-15DOI: 10.1016/j.heliyon.2024.e39915
Zuomin Zhang, Xun Xiao, Chunfeng Liu
Many developing countries use tax reform as a strategy to support national or regional development. China's tax reform of the Hainan Free Trade Port in 2025 serves this purpose. The reform replaces the existing VAT, consumption tax, vehicle purchase tax, urban maintenance and construction tax, and education fee ("four taxes and one fee") with a sales tax. Previous studies of tax structure reform have rarely addressed the economic impact of such a transition, and few sales tax studies have discussed the issue of optimal tax rates. To study the economic effects of the introduction of sales tax and to find the optimal tax rate, this paper uses the computable general equilibrium (CGE) model to conduct simulation analyses. It is found that the sales tax rate should be 17.16 % to keep the fiscal revenue of Hainan Province more or less unchanged after the 'four taxes and one fee' are simplified into sales tax. The total economic volume and sales tax rate show an inverted 'U' type relationship, the optimal sales tax rate is about 9.79 %, and the tax rate of GDP, investment, employment growth of 3.82 %, 0.35 %, 3.41 %, respectively, the manufacturing industry and other industries in most of the different degrees of growth. Therefore, we suggest that the average sales tax rate of Hainan Free Trade Port should be around 9.79 %.
{"title":"The economic effects of tax structure transformation: A study based on the tax reform of China's hainan free trade port.","authors":"Zuomin Zhang, Xun Xiao, Chunfeng Liu","doi":"10.1016/j.heliyon.2024.e39915","DOIUrl":"10.1016/j.heliyon.2024.e39915","url":null,"abstract":"<p><p>Many developing countries use tax reform as a strategy to support national or regional development. China's tax reform of the Hainan Free Trade Port in 2025 serves this purpose. The reform replaces the existing VAT, consumption tax, vehicle purchase tax, urban maintenance and construction tax, and education fee (\"four taxes and one fee\") with a sales tax. Previous studies of tax structure reform have rarely addressed the economic impact of such a transition, and few sales tax studies have discussed the issue of optimal tax rates. To study the economic effects of the introduction of sales tax and to find the optimal tax rate, this paper uses the computable general equilibrium (CGE) model to conduct simulation analyses. It is found that the sales tax rate should be 17.16 % to keep the fiscal revenue of Hainan Province more or less unchanged after the 'four taxes and one fee' are simplified into sales tax. The total economic volume and sales tax rate show an inverted 'U' type relationship, the optimal sales tax rate is about 9.79 %, and the tax rate of GDP, investment, employment growth of 3.82 %, 0.35 %, 3.41 %, respectively, the manufacturing industry and other industries in most of the different degrees of growth. Therefore, we suggest that the average sales tax rate of Hainan Free Trade Port should be around 9.79 %.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39915"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11566697/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142647731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29eCollection Date: 2024-11-15DOI: 10.1016/j.heliyon.2024.e39694
Rubén Ruiz-Torrubiano, Sebastian Knopp, Andreas Krystallidis, Lukas Matthias Wolf
In modular educational systems, students are allowed to choose a part of their curriculum themselves. The rationale behind letting students choose their courses themselves is to enhance self-responsibility, improve student motivation, and allow for focus on specific areas of interest. A central instrument for bringing these systems to fruition is the timetable. However, scheduling the timetable in such systems can be an extremely challenging and time-consuming task. In this study, we present a framework for classifying modular educational systems in Europe that reflects different degrees of freedom regarding student choices and explore the consequences from the perspective of scheduling a timetable that satisfies all requirements from the organizational and pedagogical perspectives. For this purpose, we conducted interviews in Austria, Germany, Finland, Switzerland, the Netherlands, and Luxembourg, and applied the framework to these educational systems, finding that among them the Finnish system shows the highest degree of modularity. After analyzing the consequences of modularity from the scheduling perspective, we assess the necessity for automated scheduling methods, which are central to realizing the potential and many benefits of modular education. The framework developed in this paper can be used by educational systems to assess their degree of modularity and consider the right approach to timetabling based on it.
{"title":"A scheduling perspective on modular educational systems in Europe.","authors":"Rubén Ruiz-Torrubiano, Sebastian Knopp, Andreas Krystallidis, Lukas Matthias Wolf","doi":"10.1016/j.heliyon.2024.e39694","DOIUrl":"10.1016/j.heliyon.2024.e39694","url":null,"abstract":"<p><p>In modular educational systems, students are allowed to choose a part of their curriculum themselves. The rationale behind letting students choose their courses themselves is to enhance self-responsibility, improve student motivation, and allow for focus on specific areas of interest. A central instrument for bringing these systems to fruition is the timetable. However, scheduling the timetable in such systems can be an extremely challenging and time-consuming task. In this study, we present a framework for classifying modular educational systems in Europe that reflects different degrees of freedom regarding student choices and explore the consequences from the perspective of scheduling a timetable that satisfies all requirements from the organizational and pedagogical perspectives. For this purpose, we conducted interviews in Austria, Germany, Finland, Switzerland, the Netherlands, and Luxembourg, and applied the framework to these educational systems, finding that among them the Finnish system shows the highest degree of modularity. After analyzing the consequences of modularity from the scheduling perspective, we assess the necessity for automated scheduling methods, which are central to realizing the potential and many benefits of modular education. The framework developed in this paper can be used by educational systems to assess their degree of modularity and consider the right approach to timetabling based on it.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39694"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11564022/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142647697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29eCollection Date: 2024-11-15DOI: 10.1016/j.heliyon.2024.e39891
J B Davion, I Coku, A Wissocq, A Genet, J Poupart, L Defebvre, V Huin
Pseudohypoaldosteronism type II is a rare Mendelian disorder characterized by hypertension, hyperkalemia, hyperchloremia and metabolic acidosis, despite a normal glomerular filtration rate. Four genes (KLHL3, CUL3, WNK1 and WNK4) are associated with this disease. Mutations in the KLHL3 gene cause pseudohypoaldosteronism type II in either an autosomal dominant or a recessive inheritance pattern. Sensory neuropathy has been associated with autosomal recessive mutations in WNK1, but not with KHLH3. We reported a unique three-generation family with dominant pseudohypoaldosteronism type II and sensory neuropathy. Three affected members of the family underwent neurological examination, nerve conduction studies and exome sequencing. A 13-years-old girl had a history of pseudohypoaldosteronism type II, and suffered from neuropathic pain associated with a sensory neuronopathy. Her mother and grandfather have pseudohypoaldosteronism type II associated with an asymptomatic sensory neuropathy on nerve conduction studies. Exome sequencing revealed in all affected members two missenses at heterozygous state, one pathogenic variant in KLHL3, which may be responsible for the sensory neuropathy. This is the first description of neurological features associated with KLHL3 mutation. Our study expands the genotype-phenotype spectrum of KLHL3 with the addition of sensory neuronopathy.
假性高醛固酮增多症 II 型是一种罕见的孟德尔疾病,尽管肾小球滤过率正常,但却以高血压、高钾血症、高胆碱血症和代谢性酸中毒为特征。该病与四个基因(KLHL3、CUL3、WNK1 和 WNK4)有关。KLHL3 基因突变导致假性肾上腺醛固酮增多症 II 型,为常染色体显性或隐性遗传模式。感觉神经病与 WNK1 的常染色体隐性突变有关,但与 KHLH3 无关。我们报告了一个三代同堂的独特家族,该家族患有显性假性肾上腺醛固酮增多症 II 型和感觉神经病变。家族中三名患者接受了神经系统检查、神经传导研究和外显子组测序。一名13岁的女孩患有假性肾上腺醛固酮增多症II型,并伴有感觉神经病变引起的神经性疼痛。她的母亲和祖父都患有假性肾上腺醛固酮增多症 II 型,并在神经传导检查中发现无症状的感觉神经病变。外显子组测序发现,所有受影响的成员中都有两个杂合状态的错义,其中一个是 KLHL3 的致病变体,这可能是导致感觉神经病的原因。这是首次描述与KLHL3基因突变相关的神经系统特征。我们的研究扩展了KLHL3的基因型-表型谱,增加了感觉神经病。
{"title":"Pseudohypoaldosteronism type II and sensory neuropathy associated with a heterozygous pathogenic variant in KLHL3 gene, a case report.","authors":"J B Davion, I Coku, A Wissocq, A Genet, J Poupart, L Defebvre, V Huin","doi":"10.1016/j.heliyon.2024.e39891","DOIUrl":"10.1016/j.heliyon.2024.e39891","url":null,"abstract":"<p><p>Pseudohypoaldosteronism type II is a rare Mendelian disorder characterized by hypertension, hyperkalemia, hyperchloremia and metabolic acidosis, despite a normal glomerular filtration rate. Four genes (<i>KLHL3</i>, <i>CUL3</i>, <i>WNK1</i> and <i>WNK4</i>) are associated with this disease. Mutations in the <i>KLHL3</i> gene cause pseudohypoaldosteronism type II in either an autosomal dominant or a recessive inheritance pattern. Sensory neuropathy has been associated with autosomal recessive mutations in <i>WNK1</i>, but not with <i>KHLH3</i>. We reported a unique three-generation family with dominant pseudohypoaldosteronism type II and sensory neuropathy. Three affected members of the family underwent neurological examination, nerve conduction studies and exome sequencing. A 13-years-old girl had a history of pseudohypoaldosteronism type II, and suffered from neuropathic pain associated with a sensory neuronopathy. Her mother and grandfather have pseudohypoaldosteronism type II associated with an asymptomatic sensory neuropathy on nerve conduction studies. Exome sequencing revealed in all affected members two missenses at heterozygous state, one pathogenic variant in <i>KLHL3,</i> which may be responsible for the sensory neuropathy. This is the first description of neurological features associated with <i>KLHL3</i> mutation. Our study expands the genotype-phenotype spectrum of <i>KLHL3</i> with the addition of sensory neuronopathy.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39891"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11566686/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142647494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29eCollection Date: 2024-11-15DOI: 10.1016/j.heliyon.2024.e39926
Dimah Al-Fraihat, Yousef Sharrab, Abdel-Rahman Al-Ghuwairi, Hamza Alzabut, Malik Beshara, Abdulmohsen Algarni
Distributed agile software development (DASD) has become a prominent software development approach. Proper task allocation is crucial in DASD to avoid undesirable outcomes including project rejection by clients, unfavorable team attitudes, and project failure. Coordination and communication issues occur as businesses embrace the DASD environment more frequently to tap into global talent and knowledge while cutting development expenses. To overcome these challenges, efficient task allocation planning becomes a crucial success component in software project management. The purpose of this study is to utilize machine learning (ML) predictive algorithms to determine the most appropriate role for a given task, with the aim of assisting software managers in making task assignments more efficiently and effectively in DASD environment. Preprocessing steps applied to the dataset include data cleaning, normalization, and partitioning into training, validation, and test sets. Four model classifiers were used in the experiment: Random Forest, Decision Tree, K-Nearest Neighbors (K-NN), and AdaBoost. The results showed that Random Forest outperformed the other classifiers in task allocation prediction, achieving an accuracy of 96.7 %, followed by K-NN (94.2 %), Decision Tree (93.5 %), and AdaBoost (93 %). The study demonstrates that ML models are effective in tackling task allocation issues in DASD settings, and the outcomes are promising.
{"title":"Utilizing machine learning algorithms for task allocation in distributed agile software development.","authors":"Dimah Al-Fraihat, Yousef Sharrab, Abdel-Rahman Al-Ghuwairi, Hamza Alzabut, Malik Beshara, Abdulmohsen Algarni","doi":"10.1016/j.heliyon.2024.e39926","DOIUrl":"10.1016/j.heliyon.2024.e39926","url":null,"abstract":"<p><p>Distributed agile software development (DASD) has become a prominent software development approach. Proper task allocation is crucial in DASD to avoid undesirable outcomes including project rejection by clients, unfavorable team attitudes, and project failure. Coordination and communication issues occur as businesses embrace the DASD environment more frequently to tap into global talent and knowledge while cutting development expenses. To overcome these challenges, efficient task allocation planning becomes a crucial success component in software project management. The purpose of this study is to utilize machine learning (ML) predictive algorithms to determine the most appropriate role for a given task, with the aim of assisting software managers in making task assignments more efficiently and effectively in DASD environment. Preprocessing steps applied to the dataset include data cleaning, normalization, and partitioning into training, validation, and test sets. Four model classifiers were used in the experiment: Random Forest, Decision Tree, K-Nearest Neighbors (K-NN), and AdaBoost. The results showed that Random Forest outperformed the other classifiers in task allocation prediction, achieving an accuracy of 96.7 %, followed by K-NN (94.2 %), Decision Tree (93.5 %), and AdaBoost (93 %). The study demonstrates that ML models are effective in tackling task allocation issues in DASD settings, and the outcomes are promising.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39926"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11567032/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142647751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29eCollection Date: 2024-11-15DOI: 10.1016/j.heliyon.2024.e39918
Fahim Afzal, Haiying Pan, Farman Afzal, Rana Faizan Gul
There exists a potential interdependence among the United States markets, alongside an exceptional dependence on the East Asian stock markets. This transmission of risks is similarly evident in funds that are traded within markets. The current study seeks to uncover the pathways of risk contagion among various financial markets. This study examines how risks of funds spread across borders among China, the United States, and East Asia using Extreme Value Theory (EVT) and C vine copula quantile regression. It uses models such as AR (1), EGARCH (1, 1), Peak over Threshold (POT), and Copula methods to predict volatility events and correlation patterns during times of high volatility versus regular periods. Notably, the United States exhibits a risk transmission effect on the East Asian market compared to China. Furthermore, the findings indicate that, in times of high volatility, the risk spillover effect is comparatively weak, which is contrary to the situation of the US market. The study suggests that China's financial impact could progressively rise due to initiatives aimed at sector integration and enhancing financial independence. These findings have enlightening consequences for macro-prudential regulatory agencies, emphasizing the necessity of effective regulation to address cross-border risk spillovers. International investors can benefit from these results by incorporating risk-hedging strategies, accurately evaluating derivatives, and making wise investment decisions.
美国市场之间存在着潜在的相互依存关系,同时对东亚股票市场也存在着特殊的依赖性。这种风险传染在市场内交易的基金中同样明显。本研究试图揭示不同金融市场之间风险传染的途径。本研究利用极值理论(EVT)和 C vine copula 量子回归法研究了基金风险如何在中国、美国和东亚之间跨境传播。研究使用了 AR (1)、EGARCH (1,1)、Peak over Threshold (POT) 和 Copula 等模型来预测高波动期与正常波动期的波动事件和相关模式。值得注意的是,与中国相比,美国对东亚市场表现出风险传导效应。此外,研究结果表明,在高波动率时期,风险溢出效应相对较弱,这与美国市场的情况相反。研究表明,中国的金融影响力可能会因行业整合和增强金融独立性的举措而逐步上升。这些研究结果对宏观审慎监管机构具有启发意义,强调了有效监管以应对跨境风险溢出的必要性。国际投资者可以从这些结果中获益,纳入风险对冲策略,准确评估衍生工具,做出明智的投资决策。
{"title":"Analyzing risk contagion and volatility spillover across multi-market capital flow using EVT theory and C-vine Copula.","authors":"Fahim Afzal, Haiying Pan, Farman Afzal, Rana Faizan Gul","doi":"10.1016/j.heliyon.2024.e39918","DOIUrl":"10.1016/j.heliyon.2024.e39918","url":null,"abstract":"<p><p>There exists a potential interdependence among the United States markets, alongside an exceptional dependence on the East Asian stock markets. This transmission of risks is similarly evident in funds that are traded within markets. The current study seeks to uncover the pathways of risk contagion among various financial markets. This study examines how risks of funds spread across borders among China, the United States, and East Asia using Extreme Value Theory (EVT) and C vine copula quantile regression. It uses models such as AR (1), EGARCH (1, 1), Peak over Threshold (POT), and Copula methods to predict volatility events and correlation patterns during times of high volatility versus regular periods. Notably, the United States exhibits a risk transmission effect on the East Asian market compared to China. Furthermore, the findings indicate that, in times of high volatility, the risk spillover effect is comparatively weak, which is contrary to the situation of the US market. The study suggests that China's financial impact could progressively rise due to initiatives aimed at sector integration and enhancing financial independence. These findings have enlightening consequences for macro-prudential regulatory agencies, emphasizing the necessity of effective regulation to address cross-border risk spillovers. International investors can benefit from these results by incorporating risk-hedging strategies, accurately evaluating derivatives, and making wise investment decisions.</p>","PeriodicalId":12894,"journal":{"name":"Heliyon","volume":"10 21","pages":"e39918"},"PeriodicalIF":3.4,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11564031/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142647120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}