952 research outputs found
The expected FOF plotted against experimental observations.
No full text<p>Both axes are in logarithmic scale to make FOF data more legible. The expected FOFs under BB (A) and GP (B) models are plotted against the experimentally observed FOF from Lib843. The expected FOF under GIGP model is plotted against the experimental observations from Lib843 (C) and the pooled library (D).</p
基于因子的FOF组合构建应用
No full textabstract: 近年来，中国内地FOF业务发展迅速，但在业务发展初期的实践中，FOF管理人在遴选基金资产和预测其未来收益等方面遇到诸多困难，传统的FOF组合构建技术往往不理想。本文借鉴海外因子配置相关理论，尝试通过归因分析基金的收益来源，寻找能深度刻画基金经理管理能力的特质因子，创新性地提出了基于权益类基金的特质因子构建FOF组合的新方法。本文选择100家权益类私募基金，通过因子拆解剥离了市场、行业、风格等共同影响因素，遴选出特质因子表现更优的基金经理，而不是仅仅选择过往业绩好的基金经理，并基于特质因子构建一组FOF组合，与此同时，运用传统方法构建基于基金资产的另一组FOF组合，对比两种组合方法的组合绩效，实证结果显示基于特质因子的FOF组合绩效更优。本文进一步运用转移概率矩阵和相关性分析，找到了基于特质因子的FOF组合绩效更优的证据，即特质因子延续性更好和相关性更低。与基于基金资产的FOF组合配置传统方法相比，由于基金的特质因子延续性更好，运用历史数据预测未来收益的确定性相对更好；基金的特质因子之间的相关性低，大幅增强了FOF组合配置的稳定性和分散性。总体来讲，基于特质因子的FOF组合配置方法为FOF管理人提供了一个更量化、更有效、更稳健的组合配置新路径，能有效提升FOF组合配置的绩效。
关键词: FOF、因子投资、组合配置、特质因子Dissertation/ThesisDoctoral Dissertation Business Administration 202
Recommended from our members
Author response
No full textNumerous brain regions have been shown to have neural correlates of gradually accumulating evidence for decision-making, but the causal roles of these regions in decisions driven by accumulation of evidence have yet to be determined. Here, in rats performing an auditory evidence accumulation task, we inactivated the frontal orienting fields (FOF) and posterior parietal cortex (PPC), two rat cortical regions that have neural correlates of accumulating evidence and that have been proposed as central to decision-making. We used a detailed model of the decision process to analyze the effect of inactivations. Inactivation of the FOF induced substantial performance impairments that were quantitatively best described as an impairment in the output pathway of an evidence accumulator with a long integration time constant (>240 ms). In contrast, we found a minimal role for PPC in decisions guided by accumulating auditory evidence, even while finding a strong role for PPC in internally-guided decisions
Photometry of elliptical galaxies in crowded starfields
No full textIncludes bibliographical references
Condrodisplasia punctata - doença de Conradi-Hünermann: relato de dois casos.
No full textTrabalho de Conclusão de Curso - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Departamento de Clínica Médica, Curso de Medicina, Florianópolis, 198
The economic impact of military expenditures
No full textThe author addresses three questions about military spending in developing countries: What are the levels of (and trends in) military spending as a percentage of gross national product? What impact does peacetime military spending have on growth, government spending on social welfare and infrastructure, and other key economic variables? What major factors influence the level of military spending? The author finds that military spending as a share of GNP generally fell in the 1980s, even in the Middle East and North Africa. The mean level of military expenditure as a share of GNP (MES) was 3.9 percent, well below the peak of 5.3 percent in 1976. In 1989, MES averaged only 2.7 percent in Latin America and 2.0 percent in sub-Saharan Africa - the two regions with the most severe economic problems. He finds no evidence of a negative relationship between military spending as a share of GNP and the peacetime growth rate of developing countries - except where military spending is high. He finds that higher shares of MES are not associated with lower shares of government spending on education, health, and infrastructure. As MES increases, government spending as a share of GNP increases, which allows the level of spending on health, education, and infrastructure to be maintained. The author finds some evidence that increased military spending in the developing countries has a weak negative impact on investment and the balance of trade. He finds no evidence of a statistically significant relationship between military spending and inflation. The most important determinant of peacetime military spending is the spending level of neighboring countries - in other words, the potential external threat. Regional conciliation and disarmament may be an important step toward reduced military spending.Achieving Shared Growth,Economic Growth,Peace&Peacekeeping,Health Monitoring&Evaluation,Economic Theory&Research
Tai Chi for Falls Prevention: A Student-led DNP Project
No full textabstract: Aim: To reduce the fear of falling in an elderly population by teaching ‘Tai Chi for Falls Prevention’ classes twice a week for 12 weeks.
Background & Significance: Falls continue to be the leading cause of injury-related deaths of Arizonans who are 65 years or older - well above the national average. It is predicted that by 2030, national medical spending for this population will total over $31 billion, yearly. Tai Chi is revered for being a beneficial form of simple, low-impact exercise, which the CDC endorses for its falls risk reduction benefits.
Methods: The intervention consisted of 60-minute classes occurring twice a week for 12 weeks. Participants were English-speaking, between 65-85 years old, and able to ambulate independently. Appropriate pre-screening tools were used before applicants consented. Their Fear of Falling (FoF) was measured using a fall risk perception tool at the beginning, middle, and the end of the project. This ordinal data was analyzed with Friedman ANOVA using SPSS 25
Outcomes/Results: After enrolling five total participants, only three completed the project. This severely limited data analysis of their FoF, resulting in a statistical significance (p = 0.68), deeming the intervention ineffective - Despite observable downwards trending FoF scores.
Conclusion: The acceptance of the null hypothesis is attributed to the low enrollment and high attrition rate. Also, the only data measured was quantifiable, subjective data. Future projects could add objective data to reinforce the benefits of Tai Chi. This might reinforce the validity of Tai Chi as a practical recommendation due to its cost-effective simple interventional design and effectiveness for prevention of accidental falls. Increased focus on improved recruitment & retainment strategies should be prioritized for similar projects in the future
Câncer de canal e margem anal- análise de 38 casos.
No full textTrabalho de Conclusão de Curso - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Departamento de Clínica Cirúrgica, Curso de Medicina, Florianópolis, 199
What matters in implementing the factory of the future: Insights from a survey in European manufacturing regions
No full textPurpose: This paper aims to study the extent of the transformation of European manufacturing companies towards the factory of the future (FoF) and related concepts, e.g. Industry 4.0 and digitalisation. Design/methodology/approach: A qualitative survey design was used to investigate the areas, patterns and elements for implementing FoF. A total of 92 responses from manufacturing firms of Alpine regions were collected and analysed, followed by in-depth interviews with a subset of respondents to identify common challenges, drivers and opportunities for the transformation. Findings: Manufacturing companies are gaining awareness on their needs and gaps in the FoF path, the implications on business strategy and the rates of innovation and technology adoption. Nevertheless, they still need to shape their organisational structures (e.g. from highly centralised to more collaborative ones) and nurture their managerial capabilities in operations and supply chain management, and customer relationships, only partially based on FoF technologies. Research limitations/implications: This study aims to contribute to recent literature and practice of FoF (and related concepts) by depicting a picture of the possible areas of intervention, main issues and gaps (especially in terms of skills, supply chain and customer relationships) of manufacturing companies in their digital transformation. The qualitative research design and its scope represent the main limitations. Originality/value: This paper provides a systemic overview for FoF by encompassing the technological, strategic, managerial and organisational perspectives of digitalisation in manufacturing and integrating the insights from a multi-sectorial and multi-dimensional analysis
- …
