D-1,2,4-丁三醇的绿色合成

D-1,2,4-丁三醇(D-1,2,4-butanetriol,BT)是四碳的手性多羟基醇,同时也是极具价值的有机合成中间体,应用十分广泛,特别是在医药和军事工业领域。目前D-1,2,4-丁三醇的工业化生产仍以化学合成法为主,该方法存在反应条件苛刻、产率低、副产物多,易引发环境污染等弊端。目前,利用合成生物学技术,安全高效的生物合成该化学品成为研究的热点。本文评述了D-1,2,4-丁三醇的化学合成和生物合成,以期为D-1,2,4-丁三醇的绿色合成提供理论基础。     

A dynamic product quality evaluation based pricing model for perishable food supply chains

Waste stemmed from inappropriate quality control and excessive inventories is a major challenge for perishable food management in grocery retail chains. Improvement of visibility and traceability in food supply chains facilitated by tracking and tracing technologies has great potential to improve operations efficiency. This research aims to reduce food spoilage waste and maximise food retailer's profit through a pricing approach based on dynamically identified food shelf life. The proposed model is evaluated through different pricing policies to exploit the benefits from utilising accurate product shelf life information captured through innovated tracking and monitoring technologies. Numerical analysis is conducted in an illustrative case study.     

Older Adults’ Receipt of Financial Help: Does Personality Matter?

This study examined the role of personality traits in the receipt of financial help at older ages using the 2006 and 2008 waves of Health and Retirement Study data. An investigation of (1) how the five domains of personality traits (openness to experience, conscientiousness, extraversion, agreeableness, and neuroticism) are associated with the receipt of financial help among older adults and (2) the relationship between personality traits and the source of financial help received was examined. Three sets of probit analyses were conducted. The results indicated that personality can predict financial help and the source of financial help. Specifically, older adults who exhibited relatively higher levels of neuroticism and agreeableness were more likely to receive financial help, whereas those who exhibited relatively higher levels of conscientiousness were less likely to receive financial help regardless of the source. Furthermore, older adults who had relatively higher levels of neuroticism were more likely to help themselves with individual sources such as credit cards whereas agreeable older adults were more likely to receive financial help from family members. These findings have implications for financial counseling, planning and education professionals, public assistance program directors, and policy makers. Understanding the effect of personality on financial decision-making can help with financial planning throughout life and inform outreach efforts for those in need of financial help.     

When Nonprofit Organizations Meet Information and Communication Technologies: How Organizational Culture Influences the Use of Traditional,Digital, and Sharing Media

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - In contrast to previous studies that emphasized how resources and institutional forces influence nonprofit organizations...     

What makes hybrid insourcing successful: A new public–private partnership model for social welfare services

Outsourcing has been a key policy tool for delivering a range of social services, and regarded as more effective than insourcing or direct government provision. At the same time, it has also caused many delivery issues such as principal‐agent problems, a lack of policy coordination, and poor‐quality welfare services. While the pendulum continues to swing between insourcing and outsourcing, we aim to propose a new public–private partnership model called the “hybrid insourcing model” and examine which factors influence the performance of the model. In South Korea, around 2010, the local government in Namyangju City was the first to implement the “Hope Care Center model,” a kind of hybrid insourcing model, which has been praised for its innovation and widely emulated by central and local governments. Our analysis utilizes data collected between December 2017 and January 2018 from public sector employees and civilian staff in Namyangju and a comparable city, A. From this, we draw a number of implications, both for theory and for policy. We argue that, for public–private partnerships, active cooperation and equality are the biggest factors in contributing to positive performance. These work alongside leaders with a clear vision and with employees' positive attitude.     

Cultivating employee creativity through strategic internal communication: The role of leadership,symmetry, and feedback seeking behaviors

Using a survey of 405 full-time employees, this study examined how organizations’ internal communication influenced by leadership communication at the supervisory- and senior-levels impacts employee creativity and how employees’ feedback-seeking behaviors mediate these relationships. The results suggest that leadership communication at the supervisory and senior levels positively influence symmetrical internal communication system. The analysis also shows that symmetrical internal communication and leadership communication cause employees to seek more feedback from different interpersonal sources including supervisors, coworkers, and peers in other departments, which in turn enhances creativity. This paper concludes with a discussion of the theoretical and practical implications of these findings for public relations and internal communication.     

Simultaneous edit-imputation and disclosure limitation for business establishment data

Business establishment microdata typically are required to satisfy agency-specified edit rules, such as balance equations and linear inequalities. Inevitably some establishments' reported data violate the edit rules. Statistical agencies correct faulty values using a process known as edit-imputation. Business establishment data also must be heavily redacted before being shared with the public; indeed, confidentiality concerns lead many agencies not to share establishment microdata as unrestricted access files. When microdata must be heavily redacted, one approach is to create synthetic data, as done in the U.S. Longitudinal Business Database and the German IAB Establishment Panel. This article presents the first implementation of a fully integrated approach to edit-imputation and data synthesis. We illustrate the approach on data from the U.S. Census of Manufactures and present a variety of evaluations of the utility of the synthetic data. The paper also presents assessments of disclosure risks for several intruder attacks. We find that the synthetic data preserve important distributional features from the post-editing confidential microdata, and have low risks for the various attacks.     

Likelihood ratio tests for multivariate normality

This paper presents some powerful omnibus tests for multivariate normality based on the likelihood ratio and the characterizations of the multivariate normal distribution. The power of the proposed tests is studied against various alternatives via Monte Carlo simulations. Simulation studies show our tests compare well with other powerful tests including multivariate versions of the Shapiro–Wilk test and the Anderson–Darling test.     

增强意识形态主导权的哲学思考

意识形态的话语权、领导权和主导权是逐层递进的,最高层级的主导权是依靠意识形态自身魅力维持的.社会主义意识形态主导权的根本任务是实现广大无产阶级利益,它所要维护的和实际维护的利益是一致的,这和阶级社会"虚假"的观念体系有本质区别.维持意识形态的主导权,就要不断实现人民群众的根本利益,还要强化宣传教育,坚守意识形态阵地,让先进的科学理论武装群众.     

On nonparametric variogram estimation

A critical step for geostatistical prediction is estimation of variogram from the data. One of the popular methods estimating variogram is a smoothed version of classical nonparametric variogram estimator. In this paper we investigate its theoretical and empirical properties to provide useful information for using it. The main results are based on asymptotic theories (i.e., risk and central limit theorem) under nearly infill domain sampling. Simulation is also employed to make our points.