Digital Network Repertoires and Organizational Hybridity

This article summarizes a study of 37 televised debates on political issues in Denmark, conducted live before representative audiences, with polls on the issues before and after each debate. These debates are of interest to research because they were authentic, and they supply data indicating persuasive effects. Various rhetorical features were observed and related to debaters success in attracting votes. In a qualitative interpretation of the observations, we suggest that debates such as these are likely to be won by debaters whose argumentation is fair and thoughtful. Audiences may respond differently depending on whether they are voters or merely viewers. The debate format may enhance such a response, for the benefit of the democratic process.     

A Novel Forged Image Detection Method Using the Characteristics of Interpolation

Development of digital image‐editing programs has enabled us to be widely exposed to forged digital images surrounding us. Such forged images have been dispersed through the Internet, newspaper articles, and magazines, and in particular, the information contained in these unverified images happened to be regarded as true. As a result, the forged images provided wrong information for individuals and society, thus sometimes creating social issues. In order to solve such problems, this study was aimed to suggest the methods of identifying the veracity of forged images. In this way, it suggested re‐interpolation algorithm. Namely, the study re‐interpolated in identical arbitrary values both the interpolated and un‐interpolated regions based on the interpolation used a lot in forged, confirmed discrete fourier transform (DFT) characteristics of these two regions, and embodied a detection map for the final forged images, using the subtraction value between two regions in DFT characteristics.     

中国高水平参与DEPA的关键领域与路径选择

申请加入DEPA不仅是中国主动参与全球数字治理的“先手棋”,更是深化国内改革和高水平开放的关键决策,有助于中国加快构建新发展格局。为推动数字经济由产业创新驱动转向更多依赖技术创新、制度创新驱动的新阶段,中国可重点在数据流动、数字技术、数字产品、数字创新和网络安全五大领域主动对接DEPA协定要求;进一步地,系统化构建以数字自由贸易港为核心,以数字营商环境示范区为抓手、以数字经济产业先行区为重点、以数字经济国际合作区为纽带、以数字经济创新试验区为动能的“一港四区”格局,推动中国数字经济开放发展、创新发展。     

Individual Camera Identification Using Correlation of Fixed Pattern Noise in Image Sensors

Abstract:  This paper presents results of experiments related to individual video camera identification using a correlation coefficient of fixed pattern noise (FPN) in image sensors. Five color charge-coupled device (CCD) modules of the same brand were examined. Images were captured using a 12-bit monochrome video capture board and stored in a personal computer. For each module, 100 frames were captured. They were integrated to obtain FPN. The results show that a specific CCD module was distinguished among the five modules by analyzing the normalized correlation coefficient. The temporal change of the correlation coefficient during several days had only a negligible effect on identifying the modules. Furthermore, a positive relation was found between the correlation coefficient of the same modules and the number of frames that were used for image integration. Consequently, precise individual camera identification is enhanced by acquisition of as many frames as possible.     

数字签名的技术与法律分析

数字签名的目的和作用主要是证明合同主体的真实身份、证明合同的保密性和完整性以及证明合同主体对合同的确认。而其证明力的有无及证明力的大小又是以技术作保障的,换言之,安全性是证明力的前提和基础,是法律承认其效力的基石。     

活体跟骨数字X线片性别判定

目的应用数字X线摄影方法测量跟骨,评估5项测量指标在法医学性别判定中的价值。方法393例受试对象随机分组,实验组334例(男性148例,女性186例),验证组59例(男性26例,女性33例)。每一受试对象按照规定投照方法摄跟骨侧位DR片,分别测量5项跟骨长度指标。方差分析检验实验组各项指标性别间差异,Fisher判别分析及多元逐步判别分析建立性别判别函数。验证组样本数据回代,前瞻性评估判别效能。结果5项指标性别差异有统计学意义(P<0.001)。共建立了6组性别判别函数,性别判断正确率在78.4%～88.9%之间;回代检验,判断正确率在79.7%～86.4%之间。结论跟骨侧位数字X线片5项长度测量指标代入判别函数进行性别判定的方法可为法医学个人识别中的性别判定提供帮助。     

数字签名与电子签名法

《中华人民共和国电子签名法》已经开始实施,本文对电子签名的定义、使用的范围及其作用作了介绍,并对电子签名技术实现中的一些技术问题如公钥基础设施PKI的功能,三种最常用的公钥算法,数据摘要与哈希(Hash)函数的作用与要求,常用的哈希算法MD5与SHA-1,以及数字签名的技术实现过程作了一些探索。     

从矛盾到共生：论智能化时代劳动教育资源的科技化向度

第四次工业革命的到来颠覆了人类的劳动认知与劳动形式,数字化技术、信息化技术的迅速发展对劳动教育带来巨大冲击,表现为劳动中人类主体性价值被弱化、劳动的教育性被淡化、劳动教育的时空泛在化。究其根本是因为劳动教育资源开发滞后于社会的发展。首先,劳动教育资源认知的滞后导致劳动教育开展的局限性;其次,劳动教育传统资源开发手段使得劳动教育技术落后;最后,劳动教育资源开发的内容处于“象牙塔”中,致使劳动教育与社会脱节。要将智能化时代带来的“危”转化为劳动教育发展的“机”,需聚焦劳动教育资源开发的科技化,更新概念认知、跳出惯性思维,善用大数据等方式促使劳动教育与智能技术和谐共生。     

区块链经济学的形成与展望

数字经济是中国经济的重要发展方向之一，而区块链是数字经济的基础技术之一。自2008年以来，区块链的技术取得了长足发展，并且在加密货币、金融、供应链管理、企业管理和公共管理等众多领域产生了广泛的应用前景。文章介绍了最近几年来关于区块链的经济学和金融学研究。首先，文章介绍了区块链的发展背景。其次，文章介绍了区块链的运行机制以及背后的经济学原理。再次，文章从博弈论、市场均衡、网络经济学、交易成本经济学、信息经济学和产业组织理论等多个角度，系统地梳理了关于区块链的经济学和金融学研究成果。最后，文章基于我国区块链产业的发展需求，提出区块链经济学的下一步发展，应该重点关注联盟链落地机制、参与方信息结构、主权货币实施方案以及区块链在医疗、公益、食品安全等行业的具体应用机制设计等问题。     

Is the genie out of the bottle? Digital platforms and the future of clinical trials

Is it possible to conduct impartial clinical trials in a world full of digital networking tools that patients can use to coordinate themselves and act against research protocols? This paper builds on an ethnography of PatientsLikeMe, a company running an internet social media network where patients with different conditions share their clinical data with standardized questionnaires. The company faced a serious dilemma in 2011 when some ALS patients, members of the site, started sharing data about a phase II clinical trial of an experimental drug (NP001) in which some of them were participating, to anticipate the experiment’s outcomes and understand each one’s allocation over trial arms. In parallel, some other patients were using the site and other web tools to coordinate and run their own replication of the trial with homebrew mixes of industrial grade chemicals. PatientsLikeMe researchers reflected on their position as networks managers and eventually decided to use the collected data to develop their own analysis of the efficacy of the original compound, and of the homebrewers’ compound. They presented the NP001 events as a case in point for articulating a new social contract for clinical research. This paper analyses these events, first, by understanding the clinical trial as an experiment organization form that can succeed only as long as its protocol can be enforced; second, we observe how web networks make it dramatically easier for the trial protocol to be violated; finally, we point out how a potentially dangerous confluence of interests over web networks could incubate developments that disrupt the status quo without creating a robust and safe alternative for experimentation. We conclude by warning about the interests of the pharmaceutical industry in exploiting patients’ methodological requests to its own advantage.