开源软件社区知识协作网络核心开发者识别

开源软件社区中开发者是流动的,有效识别出核心开发者并对其采取保护措施能够更好地促进社区集体智慧涌现.以开源软件项目AngularJS为例,通过获取开发者在GitHub上的提交记录,抽取开发者协作关系构建知识协作网络,运用社会网络分析的方法,在原有度中心性和介数中心性指标的基础上,将开发者节点的社团结构考虑进来提出新的评价指标.采用TOPSIS多属性决策方法进行核心开发者识别.仿真模拟核心开发者的流失,探究识别效果.研究发现:考虑社团结构的指标和以往指标识别出的核心开发者具有较大的相似性,和真实名单对比均具有一定的准确性,但在重要性排序上考虑社团结构的指标体系识别效果更显著.     

Bioaugmentation with Thermoanaerobacterium thermosaccharolyticum W16 to enhance thermophilic hydrogen production using corn stover hydrolysate

In the present work, with corn stover hydrolysate as the substrate, an efficient hydrogen-producing thermophile, Thermoanaerobacterium thermosaccharolyticum W16, was added to three kinds of seed sludge (rotten corn stover (RCS), cow dung compost (CDC), and sludge from anaerobic digestion (SAD)) to investigate the effect of bioaugmentation on thermophilic hydrogen production. Batch test results indicate that the bioaugmentation with a small amount of the strain T. thermosaccharolyticum W16 (5% of total microbes) increased the hydrogen yield to varying degrees (RCS: from 8.78 to 9.90 mmol H₂/g utilized sugar; CDC: from 8.18 to 8.42 mmol H₂/g utilized sugar; SAD: from 8.55 to 9.17 mmol H₂/g utilized sugar). The bioaugmentation process also influenced the soluble metabolites composition towards more acetate and less butyrate production for RCS, and more acetate and less ethanol accumulation for SAD. Microbial community analysis indicates that Thermoanaerobacterium spp. and Clostridium spp. dominated microbial community in all situations and might be mainly responsible for thermophilic hydrogen generation. For RCS and SAD, the bioaugmentation obviously increased the relative abundance of the strain T. thermosaccharolyticum W16 in microbial community, which might be the main reason for the improvement of hydrogen production in these cases.     

大数据时代下数字生活社区的前景

随着信息化大数据时代的到来,既给信息科技从业者带来新的机遇和挑战的同时,也给大众百姓的生活带来巨大的品质提升,数字生活社区将引导一场前所未有的技术革命,对影响人们衣、食、住、行、医等方方面面,也使得人们对科技生活的依赖性更加增强,更加的理所当然.     

Empowering Local Communities? An International Review of Community Land Trusts

This paper aims to investigate the premise that community land trusts (CLTs) offer a method of delivering affordable housing that empowers local communities and provides democratic management of community assets. The paper provides a comparative analysis of CLT developments in England, Scotland and the USA, reviewing the policy and literature to identify two key approaches that underpin CLTs: an approach to property development that emphasises resale restrictions used to preserve housing use for the CLT's target clientele, and an approach to citizen governance that privileges local communities. The paper identifies a variation of practices that underpin the operation of CLTs in each country and uses the advanced developments in Scotland and the USA to illustrate some of the challenges that remain if the CLT sector in England is to continue its recent growth.     

日本持续照顾型养老社区的开发模式与实践

持续照顾型养老社区在养老机构中起着重要的作用。中国正在进一步加速老龄化且拥有超过1亿老年人口。本文将探讨日本持续照顾型养老社区相应的建筑设计层面和运营层面的经验及其在中国应用的可能。     

Monies,economies and democracy: cultivating ambivalence in the co-design of digital currencies

ABSTRACT

Systematised collaborative design of complementary currencies is still a largely unexplored area that offers underutilised opportunities for supporting a fair and sustainable sharing economy. Future currency design necessitates attention to the systemic factors and the social particularities in which new monetary alternatives, i.e. ‘monies’, and the technological solutions that serve these alternatives, are created. This paper argues for a socially and contextually sensitive design of complementary currency innovation. It considers the technological conditions and the tendencies to exploitation from contemporary capitalism. Based on the literature review, we propose collaborative design of complementary currencies with particularist and inclusive approaches. New directions for open-ended economic innovation are explored in finding opportunities in the future-oriented Transition Design, supported by an empathic and ambivalent design mindset.     

Anodic potential on dual-chambered microbial fuel cell with sulphate reducing bacteria biofilm

Dual chamber microbial fuel cell reactors were inoculated with a mixed culture of sulfate-reducing bacteria with anode potential being the controlling parameter. A negative poised anode potential enhanced the performance of this fuel cell while a positive poised anode potential had adverse effects on cell performance. Negative anodic potential affects the biofilm characteristics, as evidenced by electrochemical analysis. Microbial community was changed accordingly.     

Value drivers of blockchain technology: A case study of blockchain-enabled online community

There is growing recognition that blockchain technology has significant potential to alter how organizations and people work and communicate. However, theoretical guidance concerning how organizations leverage blockchain technology to enhance value creation for users is still limited. Grounded in the socio-technical perspective and leveraging the rich data obtained from case analyses of blockchain-enabled online communities, this paper develops a theoretical model to identify the core value drivers that blockchain enables for online communities. The core value drivers include: a reputation-value system, data ownership mechanisms, and verification & tracking mechanisms. Our findings suggest that these three value drivers enhance value creation of online communities by motivating participation and protecting contributions.     

新型冠状病毒肺炎综述文献的网络结构分析

对新型冠状病毒肺炎综述文献进行网络结构分析可为新冠疫情的应对提供有效的理论支持。采用可视化软件CiteSpace对Web of Science数据库中新型冠状病毒肺炎综述文献的引文数据进行共被引网络分析，经统计发现文献共被引网络的度分布呈幂律分布，网络连通性较强且存在小世界现象。运用团渗流算法对其进行重叠社团挖掘，检测到7篇同时跨3个社团的核心文献，结合被引频次对网络重叠节点的功能进行验证。借助网络重叠节点的ID符号、介数中心性指标发现相应研究主题间联系紧密。通过不同特征的重要网络节点，能够有效挖掘到相关的研究主题。     

基本公共服务均等化背景下吉林市社区养老问题研究

近年来，以推进基本公共服务均等化为依托而促进养老等社会服务的发展已成为各省市的重点工作之一，立足于吉林市市情，通过调查研究、定量分析等方式探索本地社区养老存在的问题以及对策。