178 research outputs found

    Adaptive sequential design for phase II single-arm oncology trials: an expansion of Simon’s design

    No full text
    Single-arm phase II trials are very common in oncology. A fixed sample trial may lack sufficient power if the true efficacy is less than the assumed one. Adaptive designs have been proposed in the literature. We propose a Simon’s design based, adaptive sequential design. Simon’s design is the most used fixed sample design for single-arm phase II oncology trials. A prominent feature of Simon’s design is that it minimizes the sample size when there is no clinically meaningful efficacy. We identify Simon’s trial as a special group sequential design. Established methods for sample size re-estimation (SSR) can be readily applied to Simon’s design. Simulations show that simply adding SSR to Simon’s design may still not provide desirable power. We propose some expansions to Simon’s design. The expanded design with SSR can provide even more power.</p

    Table_3_Can adolescents' subjective wellbeing facilitate their pro-environmental consumption behaviors? Empirical study based on 15-year-old students.pdf

    No full text
    PurposeTo address the challenge of declining pro-environmental behaviors in adolescence, this paper uses the theoretical foundations for subjective wellbeing to verify the influence of three latent dimensions of subjective wellbeing (life satisfaction, positive emotions, and negative emotions) on adolescents' pro-environmental consumption behaviors (PECBs). Furthermore, we explore the moderating effects of nations and regions in the relationship between subjective wellbeing and PECBs in adolescents.MethodBased on the international data from the Programme for International Student Assessment 2018 (PISA 2018), we construct a unique dataset that includes 57,182 samples related to the subjective wellbeing and PECBs of 15-year-old students from eight countries/economies. Specially, we employ an ordered probit model to test our hypotheses.FindingsBoth adolescents' life satisfaction and positive emotions can significantly improve their PECBs, while there is a significant negative association between negative emotions and PECBs. At the nation's level, adolescents' life satisfaction and negative emotions in developed countries/economies significantly impact PECBs. In contrast, the positive emotions of adolescents in developing countries/economies have more substantial effects on PECBs. At the regional level, the impact of all three dimensions of adolescents' subjective wellbeing on PECBs is more significant in rural than urban areas.Originality/valueThis paper provides a new perspective for understanding adolescents' PECBs from the insights of subjective wellbeing. Previous studies have examined the effects of life satisfaction or happiness on PECBs in adults. This paper examines the impact of subjective wellbeing on adolescents' PECBs from life satisfaction, positive emotions, and negative emotions, which suggests that promoting adolescents' subjective wellbeing can be an effective strategy for encouraging PECBs. From a comparative research perspective, we further analyze the differences between the nations at different levels of development, the rural and urban areas, providing a valuable reference for policymakers and practitioners in promoting pro-environmental behaviors among adolescents.</p

    Table_5_Can adolescents' subjective wellbeing facilitate their pro-environmental consumption behaviors? Empirical study based on 15-year-old students.pdf

    No full text
    PurposeTo address the challenge of declining pro-environmental behaviors in adolescence, this paper uses the theoretical foundations for subjective wellbeing to verify the influence of three latent dimensions of subjective wellbeing (life satisfaction, positive emotions, and negative emotions) on adolescents' pro-environmental consumption behaviors (PECBs). Furthermore, we explore the moderating effects of nations and regions in the relationship between subjective wellbeing and PECBs in adolescents.MethodBased on the international data from the Programme for International Student Assessment 2018 (PISA 2018), we construct a unique dataset that includes 57,182 samples related to the subjective wellbeing and PECBs of 15-year-old students from eight countries/economies. Specially, we employ an ordered probit model to test our hypotheses.FindingsBoth adolescents' life satisfaction and positive emotions can significantly improve their PECBs, while there is a significant negative association between negative emotions and PECBs. At the nation's level, adolescents' life satisfaction and negative emotions in developed countries/economies significantly impact PECBs. In contrast, the positive emotions of adolescents in developing countries/economies have more substantial effects on PECBs. At the regional level, the impact of all three dimensions of adolescents' subjective wellbeing on PECBs is more significant in rural than urban areas.Originality/valueThis paper provides a new perspective for understanding adolescents' PECBs from the insights of subjective wellbeing. Previous studies have examined the effects of life satisfaction or happiness on PECBs in adults. This paper examines the impact of subjective wellbeing on adolescents' PECBs from life satisfaction, positive emotions, and negative emotions, which suggests that promoting adolescents' subjective wellbeing can be an effective strategy for encouraging PECBs. From a comparative research perspective, we further analyze the differences between the nations at different levels of development, the rural and urban areas, providing a valuable reference for policymakers and practitioners in promoting pro-environmental behaviors among adolescents.</p

    Table_4_Can adolescents' subjective wellbeing facilitate their pro-environmental consumption behaviors? Empirical study based on 15-year-old students.pdf

    No full text
    PurposeTo address the challenge of declining pro-environmental behaviors in adolescence, this paper uses the theoretical foundations for subjective wellbeing to verify the influence of three latent dimensions of subjective wellbeing (life satisfaction, positive emotions, and negative emotions) on adolescents' pro-environmental consumption behaviors (PECBs). Furthermore, we explore the moderating effects of nations and regions in the relationship between subjective wellbeing and PECBs in adolescents.MethodBased on the international data from the Programme for International Student Assessment 2018 (PISA 2018), we construct a unique dataset that includes 57,182 samples related to the subjective wellbeing and PECBs of 15-year-old students from eight countries/economies. Specially, we employ an ordered probit model to test our hypotheses.FindingsBoth adolescents' life satisfaction and positive emotions can significantly improve their PECBs, while there is a significant negative association between negative emotions and PECBs. At the nation's level, adolescents' life satisfaction and negative emotions in developed countries/economies significantly impact PECBs. In contrast, the positive emotions of adolescents in developing countries/economies have more substantial effects on PECBs. At the regional level, the impact of all three dimensions of adolescents' subjective wellbeing on PECBs is more significant in rural than urban areas.Originality/valueThis paper provides a new perspective for understanding adolescents' PECBs from the insights of subjective wellbeing. Previous studies have examined the effects of life satisfaction or happiness on PECBs in adults. This paper examines the impact of subjective wellbeing on adolescents' PECBs from life satisfaction, positive emotions, and negative emotions, which suggests that promoting adolescents' subjective wellbeing can be an effective strategy for encouraging PECBs. From a comparative research perspective, we further analyze the differences between the nations at different levels of development, the rural and urban areas, providing a valuable reference for policymakers and practitioners in promoting pro-environmental behaviors among adolescents.</p

    Table_1_Can adolescents' subjective wellbeing facilitate their pro-environmental consumption behaviors? Empirical study based on 15-year-old students.pdf

    No full text
    PurposeTo address the challenge of declining pro-environmental behaviors in adolescence, this paper uses the theoretical foundations for subjective wellbeing to verify the influence of three latent dimensions of subjective wellbeing (life satisfaction, positive emotions, and negative emotions) on adolescents' pro-environmental consumption behaviors (PECBs). Furthermore, we explore the moderating effects of nations and regions in the relationship between subjective wellbeing and PECBs in adolescents.MethodBased on the international data from the Programme for International Student Assessment 2018 (PISA 2018), we construct a unique dataset that includes 57,182 samples related to the subjective wellbeing and PECBs of 15-year-old students from eight countries/economies. Specially, we employ an ordered probit model to test our hypotheses.FindingsBoth adolescents' life satisfaction and positive emotions can significantly improve their PECBs, while there is a significant negative association between negative emotions and PECBs. At the nation's level, adolescents' life satisfaction and negative emotions in developed countries/economies significantly impact PECBs. In contrast, the positive emotions of adolescents in developing countries/economies have more substantial effects on PECBs. At the regional level, the impact of all three dimensions of adolescents' subjective wellbeing on PECBs is more significant in rural than urban areas.Originality/valueThis paper provides a new perspective for understanding adolescents' PECBs from the insights of subjective wellbeing. Previous studies have examined the effects of life satisfaction or happiness on PECBs in adults. This paper examines the impact of subjective wellbeing on adolescents' PECBs from life satisfaction, positive emotions, and negative emotions, which suggests that promoting adolescents' subjective wellbeing can be an effective strategy for encouraging PECBs. From a comparative research perspective, we further analyze the differences between the nations at different levels of development, the rural and urban areas, providing a valuable reference for policymakers and practitioners in promoting pro-environmental behaviors among adolescents.</p

    Table_2_Can adolescents' subjective wellbeing facilitate their pro-environmental consumption behaviors? Empirical study based on 15-year-old students.pdf

    No full text
    PurposeTo address the challenge of declining pro-environmental behaviors in adolescence, this paper uses the theoretical foundations for subjective wellbeing to verify the influence of three latent dimensions of subjective wellbeing (life satisfaction, positive emotions, and negative emotions) on adolescents' pro-environmental consumption behaviors (PECBs). Furthermore, we explore the moderating effects of nations and regions in the relationship between subjective wellbeing and PECBs in adolescents.MethodBased on the international data from the Programme for International Student Assessment 2018 (PISA 2018), we construct a unique dataset that includes 57,182 samples related to the subjective wellbeing and PECBs of 15-year-old students from eight countries/economies. Specially, we employ an ordered probit model to test our hypotheses.FindingsBoth adolescents' life satisfaction and positive emotions can significantly improve their PECBs, while there is a significant negative association between negative emotions and PECBs. At the nation's level, adolescents' life satisfaction and negative emotions in developed countries/economies significantly impact PECBs. In contrast, the positive emotions of adolescents in developing countries/economies have more substantial effects on PECBs. At the regional level, the impact of all three dimensions of adolescents' subjective wellbeing on PECBs is more significant in rural than urban areas.Originality/valueThis paper provides a new perspective for understanding adolescents' PECBs from the insights of subjective wellbeing. Previous studies have examined the effects of life satisfaction or happiness on PECBs in adults. This paper examines the impact of subjective wellbeing on adolescents' PECBs from life satisfaction, positive emotions, and negative emotions, which suggests that promoting adolescents' subjective wellbeing can be an effective strategy for encouraging PECBs. From a comparative research perspective, we further analyze the differences between the nations at different levels of development, the rural and urban areas, providing a valuable reference for policymakers and practitioners in promoting pro-environmental behaviors among adolescents.</p

    Table_7_Can adolescents' subjective wellbeing facilitate their pro-environmental consumption behaviors? Empirical study based on 15-year-old students.pdf

    No full text
    PurposeTo address the challenge of declining pro-environmental behaviors in adolescence, this paper uses the theoretical foundations for subjective wellbeing to verify the influence of three latent dimensions of subjective wellbeing (life satisfaction, positive emotions, and negative emotions) on adolescents' pro-environmental consumption behaviors (PECBs). Furthermore, we explore the moderating effects of nations and regions in the relationship between subjective wellbeing and PECBs in adolescents.MethodBased on the international data from the Programme for International Student Assessment 2018 (PISA 2018), we construct a unique dataset that includes 57,182 samples related to the subjective wellbeing and PECBs of 15-year-old students from eight countries/economies. Specially, we employ an ordered probit model to test our hypotheses.FindingsBoth adolescents' life satisfaction and positive emotions can significantly improve their PECBs, while there is a significant negative association between negative emotions and PECBs. At the nation's level, adolescents' life satisfaction and negative emotions in developed countries/economies significantly impact PECBs. In contrast, the positive emotions of adolescents in developing countries/economies have more substantial effects on PECBs. At the regional level, the impact of all three dimensions of adolescents' subjective wellbeing on PECBs is more significant in rural than urban areas.Originality/valueThis paper provides a new perspective for understanding adolescents' PECBs from the insights of subjective wellbeing. Previous studies have examined the effects of life satisfaction or happiness on PECBs in adults. This paper examines the impact of subjective wellbeing on adolescents' PECBs from life satisfaction, positive emotions, and negative emotions, which suggests that promoting adolescents' subjective wellbeing can be an effective strategy for encouraging PECBs. From a comparative research perspective, we further analyze the differences between the nations at different levels of development, the rural and urban areas, providing a valuable reference for policymakers and practitioners in promoting pro-environmental behaviors among adolescents.</p

    Table_8_Can adolescents' subjective wellbeing facilitate their pro-environmental consumption behaviors? Empirical study based on 15-year-old students.pdf

    No full text
    PurposeTo address the challenge of declining pro-environmental behaviors in adolescence, this paper uses the theoretical foundations for subjective wellbeing to verify the influence of three latent dimensions of subjective wellbeing (life satisfaction, positive emotions, and negative emotions) on adolescents' pro-environmental consumption behaviors (PECBs). Furthermore, we explore the moderating effects of nations and regions in the relationship between subjective wellbeing and PECBs in adolescents.MethodBased on the international data from the Programme for International Student Assessment 2018 (PISA 2018), we construct a unique dataset that includes 57,182 samples related to the subjective wellbeing and PECBs of 15-year-old students from eight countries/economies. Specially, we employ an ordered probit model to test our hypotheses.FindingsBoth adolescents' life satisfaction and positive emotions can significantly improve their PECBs, while there is a significant negative association between negative emotions and PECBs. At the nation's level, adolescents' life satisfaction and negative emotions in developed countries/economies significantly impact PECBs. In contrast, the positive emotions of adolescents in developing countries/economies have more substantial effects on PECBs. At the regional level, the impact of all three dimensions of adolescents' subjective wellbeing on PECBs is more significant in rural than urban areas.Originality/valueThis paper provides a new perspective for understanding adolescents' PECBs from the insights of subjective wellbeing. Previous studies have examined the effects of life satisfaction or happiness on PECBs in adults. This paper examines the impact of subjective wellbeing on adolescents' PECBs from life satisfaction, positive emotions, and negative emotions, which suggests that promoting adolescents' subjective wellbeing can be an effective strategy for encouraging PECBs. From a comparative research perspective, we further analyze the differences between the nations at different levels of development, the rural and urban areas, providing a valuable reference for policymakers and practitioners in promoting pro-environmental behaviors among adolescents.</p

    Table_6_Can adolescents' subjective wellbeing facilitate their pro-environmental consumption behaviors? Empirical study based on 15-year-old students.pdf

    No full text
    PurposeTo address the challenge of declining pro-environmental behaviors in adolescence, this paper uses the theoretical foundations for subjective wellbeing to verify the influence of three latent dimensions of subjective wellbeing (life satisfaction, positive emotions, and negative emotions) on adolescents' pro-environmental consumption behaviors (PECBs). Furthermore, we explore the moderating effects of nations and regions in the relationship between subjective wellbeing and PECBs in adolescents.MethodBased on the international data from the Programme for International Student Assessment 2018 (PISA 2018), we construct a unique dataset that includes 57,182 samples related to the subjective wellbeing and PECBs of 15-year-old students from eight countries/economies. Specially, we employ an ordered probit model to test our hypotheses.FindingsBoth adolescents' life satisfaction and positive emotions can significantly improve their PECBs, while there is a significant negative association between negative emotions and PECBs. At the nation's level, adolescents' life satisfaction and negative emotions in developed countries/economies significantly impact PECBs. In contrast, the positive emotions of adolescents in developing countries/economies have more substantial effects on PECBs. At the regional level, the impact of all three dimensions of adolescents' subjective wellbeing on PECBs is more significant in rural than urban areas.Originality/valueThis paper provides a new perspective for understanding adolescents' PECBs from the insights of subjective wellbeing. Previous studies have examined the effects of life satisfaction or happiness on PECBs in adults. This paper examines the impact of subjective wellbeing on adolescents' PECBs from life satisfaction, positive emotions, and negative emotions, which suggests that promoting adolescents' subjective wellbeing can be an effective strategy for encouraging PECBs. From a comparative research perspective, we further analyze the differences between the nations at different levels of development, the rural and urban areas, providing a valuable reference for policymakers and practitioners in promoting pro-environmental behaviors among adolescents.</p

    Addition of External Organic Carbon and Native Soil Organic Carbon Decomposition: A Meta-Analysis

    No full text
    <div><h3>Background</h3><p>Extensive studies have been conducted to evaluate the effect of external organic Carbon on native soil organic carbon (SOC) decomposition. However, the direction and extent of this effect reported by different authors is inconsistent.</p> <h3>Objective</h3><p>The objective was to provide a synthesis of existing data that comprehensively and quantitatively evaluates how the soil chemical properties and incubation conditions interact with additional external organic C to affect the native SOC decomposition.</p> <h3>Data Source</h3><p>A meta-analysis was conducted on previously published empirical studies that examined the effect of the addition of external organic carbon on the native SOC decomposition through isotopic techniques.</p> <h3>Results and Conclusions</h3><p>The addition of external organic C, when averaged across all studies, enhanced the native SOC decomposition by 26.5%. The soil with higher SOC content and fine texture showed significantly higher priming effects, whereas the soil with higher total nitrogen content showed an opposite trend. The soils with higher C:N ratios had significantly stronger priming effects than those with low C:N ratios. The decomposition of native SOC was significantly enhanced more at early stage of incubation (<15d) than at the later stages (>15d). In addition, the incubation temperature and the addition rate of organic matter significantly influenced the native SOC decomposition in response to the addition of external organic C.</p> </div
    • …
    corecore