Covid-19: Emerging Considerations for Body Sourcing and Handling. A Perspective View from Nigeria     

Izuchukwu Azuka Okafor  Terkuma Chia 《Anatomical sciences education》2021,14(2):154-162

The current Coronavirus disease (Covid-19) pandemic has spread to about 220 countries of the world and has resulted in a significant number of deaths globally. Infections are still on the rise, and the impact on the global death rate could be devastating. There are fears over the likely impact of a large number of deaths on body sourcing and handling of cadavers for teaching and research. Historically, epidemics come with several challenges and have often led to some level of negligence of ethical practices and health and safety regulations associated with body sourcing and handling. The authors highlighted some emerging problems in this article, focusing on Africa and Nigeria in particular. These problems include a higher risk of coronavirus exposure for body handlers, shortage of cadavers for teaching and learning, a lack of standard regulations leading to unethical body sourcing and handling, and a lack of monitoring and collaboration needed for a well-coordinated Covid-19 pandemic response strategy. If these issues are ignored, the previous gains made in anatomical ethical practices may be destroyed. Some useful recommendations for policymaking geared toward prevention or curtailing these emerging issues have been instilled in this article.  相似文献   

Bilingual education through a pluri-centric approach: A case study of the effects of simultaneously learning two languages on L1 and L2 reading and writing proficiency     

《Studies in Educational Evaluation》2020

Language education has often been conducted based on monoglossic ideologies that keep L1 and L2 separate, a practice that receives growing criticism as out of sync with today’s multilingual globalized world. Informed by interdependence hypotheses and translanguaging theory, this research study explored the effects of a pluri-centric approach to learning L1 and L2 simultaneously. Through a bilingual intervention course with data collected from interviews, parents’ logbooks, observation field notes, questionnaires, and L1 and L2 reading and writing tests, this case study (n = 9) revealed that the approach effectively improved learners’ L1 and L2 proficiency, learning behaviour outside the classroom, self-efficacy, and confidence. Overall, the participants also perceived the bilingual course as effective, efficient, and innovative. The study provides a basis to reflect upon transferrable skills and core underlying proficiency as powerful concepts to draw upon in enhancing bilingual proficiency and effecting positive changes in learners’ behaviour and psychological well-being.  相似文献   

从“暴力美学”视域审视武术散打运动     

连美雪  马剑 《中华武术(研究)》2020,(1):124-125,83

从“暴力美学”视角对武术散打进行审视与分析,在社会的现代化发展中,武术徒手格斗形式运动项目中的散打与暴力美学的结合表达了当前社会人们对格斗竞技类项目的态度与观点。散打运动中体现着暴力美学,外在展现的暴力动作实际上是内心世界的写照,同时也是观众内心情感的寄托宣泄。如今的社会,散打运动的独特魅力吸引着更多的人来认识它,攻防技击的本质是散打运动发展的基石,也是对它的准确定位。  相似文献   

基于局域核心择优模型的B2B电商网络仿真研究     

李应  黄康  杨璇  武文颖 《科技管理研究》2019,39(18)

通过运用复杂网络对B2B电商网络进行建模仿真,发现B2B网络的运行规律,提出减少平台风险的措施。首先分析B2B电商网络的特征和演化动因,提出网络演化的动态规则、局域择优连接规则和自演化规则。接着基于演化规则,在BA模型的基础上,构建更契合于B2B电商网络的局域世界核心择优连接(Local world Core Preferred connection)演化模型。最后,采用NetLogo软件对LCP演化模型进行仿真实验。结果验证B2B电商网络具有无标度性,发现网络具有小世界性；以及网络对随机干扰具有较强的鲁棒性。  相似文献   

面向智能制造的汽车企业c2B模式实施策略     

刘宗巍  张保磊  赵福全 《科技管理研究》2019,(23)

基于新技术条件下汽车产业形态的变化趋势,分析汽车产业走向c2B模式的必然性。根据汽车产业c2B模式的发展过程特征,对其作初级、中级、高级3个不同阶段的划分,并分析该模式对汽车全生命周期各环节的影响;通过对比汽车企业c2B模式的理想状态与现实状况,总结汽车企业c2B模式的关键实现环节,并进一步归纳整车厂和零部件企业需要满足的条件。从汽车产业c2B模式与智能工厂相互交融、互为支撑的关系,分析面向智能制造进行c2B模式建设所需的硬件、软件工作;以典型整车企业为例,提出汽车企业面向智能制造进行c2B模式升级的实施策略。  相似文献   

Observer-based decentralized control of large-scale stochastic high-order feedforward systems with multi time delays     

Liang Liu  Shengyuan Xu  Xue-Jun Xie  Bing Xiao 《Journal of The Franklin Institute》2019,356(16):9627-9645

This paper investigates the problem of observer-based decentralized control for a class of large-scale stochastic high-order feedforward systems with multi time delays. By using the homogeneous domination idea and constructing the implementable observer, the decentralized output-feedback controller design scheme is firstly proposed. Then, with the aid of stochastic time delay system stability theory, the globally asymptotically stable in probability of the closed-loop system is verified by selecting an appropriate Lyapunov–Krasoviskii functional. Finally, an example is provided to demonstrate the efficiency of the proposed design method.  相似文献   

李大钊两临开封对河南国民革命统一战线的历史贡献          下载免费PDF全文

詹鸣燕  冯娜 《唐山学院学报》2018,31(1):17-21

北京政变后,中国共产党确定了同国民军等有进步倾向的军队建立统一战线的方针。在贯彻这一方针的过程中,李大钊及其领导的中共北方区委把胡景翼统治下的河南作为工作的重点。20世纪20年代,李大钊曾两次亲临开封,在国民二军中积极开展统一战线工作,为促进国民革命统一战线在河南的形成及巩固作出了重大贡献。  相似文献   

高强度的环境规制能够促进国内大气科技创新吗？——以〖SO〗_2排放控制技术为例          下载免费PDF全文

林玲  赵子健  曹聪丽 《科研管理》2018,39(12):45-52

从理论上来说，波特弱假说涉及双重外部性问题，即大气污染的负外部性和技术创新的正外部性，环境规制和知识产权保护合力才能予以切实彻底解决，而后者并没有得到普遍重视。本文认为，波特弱假说需要考虑知识产权保护强度。以SO_2排放控制技术为例，本文运采用2000-2013年省际省份面板数据，结合固定效应模型进行实证研究检验了知识产权保护对于波特弱假说的作用。结果发现，当知识产权保护较弱时，环境规制对大气科技创新具有呈现负向影响；。只有当知识产权保护较强时力度超过一定阈值时，环境规制才会对大气科技创新产生正向影响，波特弱假说成立。此外，环境规制和知识产权保护影响大气科技创新的交叉效应主要出现在企业，而非科研院所和个人，创新主体存在明显的差异性。  相似文献   

Synergetic governing controller design for the hydraulic turbine governing system with complex conduit system     

Jianzhong Zhou  Yuncheng Zhang  Yang Zheng  Yanhe Xu 《Journal of The Franklin Institute》2018,355(10):4131-4146

The hydraulic turbine governing system plays an indispensable role in maintaining the stability of electrical power system. In this paper, synergetic control theory is introduced to enhance the regulating ability of the hydraulic turbine governing system. For the purpose of describing the characteristics of objective system and deducing the synergetic control rule, a nonlinear mathematic model of a hydraulic turbine governing system with long tail race and two surge tanks is established. Furthermore, the nonlinear characteristic of the hydraulic turbine is described by six variable partial derivatives. For further investigation, the hydraulic turbine governing system is conducted to running under load condition when its coaxial generator connects to an infinite bus. Simulation experiments have been made under both load disturbance and three-phase short circuit fault conditions to compare the dynamic performances of proposed synergetic governing controller and classic PID controller. The results indicate that the proposed synergetic governing controller is an effective alternative in normal condition and a superior one in emergency. Moreover, the robustness of synergetic governing controller has also been discussed at the end of this paper.  相似文献   

New insights in stability analysis of delayed Lotka–Volterra systems     

Xu-Guang Li  Jun-Xiu Chen  Silviu-Iulian Niculescu  Arben Çela 《Journal of The Franklin Institute》2018,355(17):8683-8697

Most of the reported Lotka–Volterra examples have at most one stability interval for the delay parameters. Furthermore, the existing methods fall short in treating more general case studies. Inspired by some recent results for analyzing the stability of time-delay systems, this paper focuses on a deeper characterization of the stability of Lotka–Volterra systems w.r.t. the delay parameters. More precisely, we will introduce the recently-proposed frequency-sweeping approach to study the complete stability problem for a broad class of linearized Lotka–Volterra systems. As a result, the whole stability delay-set can be analytically determined. Moreover, as a significant byproduct of the proposed approach, some Lotka–Volterra examples are found to have multiple stability delay-intervals. To the best of the authors’ knowledge, such a characterization represents a novelty for having some insights in the population dynamics: in some situations, a longer maturation period of species is helpful for the stability of a population system.  相似文献