电信产业的价格竞争模型与接入费水平

互联互通之后，信息产业部对接入费水平的制定原则是接入费水平基于接入成本．主要讨论如何把握这个原则的问题．通过建立两个电信运营商的价格竞争模型，分析比较价格竞争之前和价格竞争之后各个运营商的状况，从而为研究此类问题提供一种新的思路．     

Microdata Access and Labor Market Research: The U. S. Experience

Summary: The paper illustrates the value of broad researcher access to survey and administrative microdata using examples drawn from the U. S. experience, outlining how analyses of trends in earnings inequality, poverty and employment dynamics using such data have benefited policy makers and contributed to improvements in statistical agency data products. Methods of facilitating researcher access, including the release of public use files, the use of licensing agreements, and the establishment of research data centers, are discussed. * The author thanks Anne Polivka, Marilyn Seastrom and two anonymous referees for helpful comments on an earlier draft of the paper.     

网络远程教育系统的设计与开发

本文分析了远程教育系统的特征与目标,探讨了如何利用硬件资源和软件环境来实现远程教育系统。     

一种双层小区结构中的切换控制策略

在宽带码分多址双层小区结构系统中提出了一种基于小区覆盖范围和信号能干比判决的切换策略,切换策略使用了基于概率的动态资源预留方案,即在切换时,如果系统中没有空闲资源,则对切换呼叫进行排队。通过仿真表明,该切换策略相对于采用固定资源预留的切换策略,在轻负荷的条件下对话音呼叫的阻塞概率有一定的改善。     

Cultural Anthropology and Open Access—Interview With Dominic Boyer,Cymene Howe,and Marcel LaFlamme

Abstract

In this installment of “Conversations,” Dominic Boyer, Cymene Howe, and Marcel LaFlamme, of the Cultural Anthropology editorial team, discuss the ins and outs of publishing a gold open access journal in the field of anthropology. Highlights of the discussion include Cultural Anthropology’s move to open access, the ethics of open access, the growth of international readership, ongoing publishing challenges in open access, and the role libraries can play with open access publishing.     

Preserving Open Access

Abstract

Libraries have an established track record of preserving the scholarly record, but this stewardship role has generally been exercised over materials the library has purchased or otherwise acquired. With open access publishing, the library’s role in preservation is less certain, as libraries may facilitate access to a wide array of freely accessible materials without ever obtaining any copies. Additionally, the open access landscape includes many small noncommercial publishers with limited resources that may not be able to invest in long term preservation and access. In this column, Courtney McAllister, Electronic Resources Librarian at Lillian Goldman Law Library, Yale University, discusses preservation concerns and strategies for open access publications and how libraries may be affected by unstable or unpredictable long-term access.     

Textbook Affordability in the Time of COVID-19

Abstract

This article provides a background of the textbook affordability problem affecting students attending United States higher education institutions, both prior to and during the 2019 novel coronavirus disease (COVID-19) pandemic, as well as potential solutions to the problem. Solutions discussed include the availability of open materials in online repositories, publisher responses like inclusive access, institutional incentive programs, and initiatives by library consortia or other statewide programs. The responses of various stakeholders to make textbooks accessible to students during the pandemic are also covered.     

Get Full Text Research and the Search for Appropriate Copies

Abstract

A group of the largest academic publishers has launched a new service to simplify access to full-text research for users of discovery services and scholarly collaboration platforms. While this service aims to provide easy access to full-text articles using article-level entitlement information linked to institutions through Seamlessaccess.org, it also introduces ambiguity. The service allows for publishers to direct users to alternative versions when a full-text entitlement is not found for the user, though users may already be entitled to full text through providers that do not participate in the service. Depending on specific implementations, this could lead to further confusion and make it more difficult for users to find an appropriate copy.     

论英国公众共用物进入法律制度及启示

公众共用物起源于古罗马法,其在英美法系国家之英国得到专门化规定。英国公众共用物法律不仅对其共用物进行明确定义,并构建公众共用物进入制度,从法律层面明确公众进入共用物的权利。这种公众进入权不仅是一种法律权利,更是一种习惯权利,是公众共同使用的权利。英国公众共用物进入法律制度启发我国公众共用物法治构建应突破传统私法的规制,在构建使用制度时应符合我国现实需求与法律文化的内涵与价值取向,有效缓解公众共用物悲剧的发生,保障公众的使用权利。     

贫困地区医疗资源配置与老年人健康

贫困地区农村老年人健康是合理优化农村医疗资源配置的重点。通过联立方程检验卫生可及性对农村老年人就医行为的影响,以及就医行为与健康之间的相互影响关系,研究发现：卫生可及性无论对老年人村镇医疗机构还是县市级医疗机构的选择均有显著影响,选择到村镇医疗机构就医的老年人有较好的健康自评状况,同时健康自评越高的老年人到村镇医疗机构就医的概率越高;而选择到县市级医疗机构就医的老年人健康自评相对较差。同时,健康知识无论对老年人自身健康状况还是就医行为,都有显著的正向作用。