Frozen Film and FOSDIC Forms: Restoring the 1960 U.S. Census of Population and Housing

In this article, the authors describe a collaboration of the Minnesota Population Center (MPC), the U.S. Census Bureau, and the National Archives and Records Administration to restore the lost data from the 1960 Census. The data survived on refrigerated microfilm in a cave in Lenexa, Kansas. The MPC is now converting the data to usable form. Once the restored data are processed, the authors intend to develop three new data sources based on the 1960 census. These data will replace the most inadequate sample in the series of public-use census microdata spanning the years from 1850 to 2000, extend the chronological scope of the public census summary files, and provide a powerful new resource for the Census Bureau and its Research Data Centers.     

New Methods of Census Record Linking

The Minnesota Population Center (MPC) has released linked datasets through its NAPP and IPUMS projects, making them readily accessible to researchers. Prior to the availability of complete count census microdata from the MPC, researchers applied various forms of record-linking software. This essay describes the techniques used in the MPC's linking program and briefly compares this technique with those used by other researchers. The key feature of the MPC linking method is the construction of cumulative name similarity scores, based on approximately 2.5 billion record comparisons; we also use support vector mechanics to classify potential links. This article explains modifications made for the final linked datasets and includes a discussion of the role of weighting variables when using linked data.     

Infrastructures of trust and distrust: The politics and ethics of emerging cryptographic technologies

The authors of this article are engaged in anthropological research on the links between the growing interest in privacy and data security as a technical field and how notions of trust, security and accountability are practised in and beyond technical fields of cryptography, specifically a field called multi-party computation (MPC). They pursue the relationship between trust in different forms of cryptography – academic and activist – and notions of trust as they are articulated in relation to data security and the protection of citizens’ data. There is a tension between the concerns raised in public debates about data security and the promises of emerging cryptographic protocols. In political speeches and public debates, citizens’ trust that governments and tech companies will protect their data is framed as important and essential. In the environments of emerging cryptographic technologies, such as blockchains, bitcoin and MPC, a promise to provide ‘trustless trust’ and abandon the need for trusted intermediaries, authorities and institutions is articulated.     

基于ELES模型的城乡居民国内旅游消费结构实证分析

本文依据ELES理论,利用2002—2008年的数据,从边际消费倾向、消费投向、收入弹性及价格弹性四个方面对我国城乡居民国内旅游消费中的食、住、行、游、购、娱等9类消费的结构进行了实证分析,主要结论如下。（1）城镇居民的国内旅游边际消费倾向为0．0636,农村居民为0．1174;在9类单项旅游消费中,购物和其它服务的边际消费倾向最高,消费投向主要为购物、其它服务和长途交通。（2）农村居民各单项旅游消费需求的收入弹性均大于l,城镇居民基本旅游消费需求的收入弹性小于l,非基本旅游消费需求和餐饮消费需求的收入弹性大于1。（3）城乡居民各项旅游消费需求的自价格弹性较大,互价格弹性较小;城镇居民非基本旅游消费需求和餐饮消费需求的自价格弹性大于1,农村居民各项旅游消费需求的自价格弹性均大于1。     

Web Service/Web GIS在突发性旅游灾害事件应急预警信息系统中的应用

本文主要探讨Web Service/Web GIS在突发性旅游灾害事件应急预警信息系统中的应用。以ArcIMS和微软的.NET应用服务器为基础应用平台,建构了面向对象的突发性旅游灾害事件应急预警信息系统,系统集成了关系模型库、专家知识库、应用信息处理技术和GIS技术,并通过WSDL描述成Web服务,发布、注册和提供给服务对象。系统实现了突发事件状态下各相关服务对象的信息共享,提高了应急预警的时效性、敏感性和决策效能。     

THE VIRTUALIZATION OF URBAN YOUNG PEOPLE'S MOBILITY PRACTICES: A TIME‐GEOGRAPHIC TYPOLOGY

A time‐geographic approach, including time–space diaries and in‐depth interviews, is used to investigate the daily use and implications of information and communication technologies (ICTs) among a group of Swedish urban youth. We identify individual variations and nuances in ICT‐based practices in our respondents' social and spatial contexts. Using individual cases and detailed time‐geographic trajectories, we demonstrate how daily communicative actions – physical and virtual – are combined and integrated. From this we identify four ideal types of mobility practices: (i) home‐oriented, heavy Internet users; (ii) physically mobile, heavy mobile phone users; (iii) physically mobile, heavy Internet and mobile phone users; and (iv) home‐oriented, rarely mobile people (virtually and physically).     

The open black box: the role of the end‐user in GIS integration

Formalist theories of knowledge that underpin GIS scholarship on integration neglect the importance and creativity of end‐users in knowledge construction. This has practical consequences for the success of large distributed databases that contribute to spatial‐data infrastructures. Spatial‐data infrastructures depend on participation at local levels, such as counties and watersheds, and they must be developed to support feedback from local users. Looking carefully at the work of scientists in a watershed in Puget Sound, Washington, USA during the salmon crisis reveals that the work of these end‐users articulates different worlds of knowledge. This view of the user is consonant with recent work in science and technology studies and research into computer‐supported cooperative work. GIS theory will be enhanced when it makes room for these users and supports their practical work .     

Multi‐Domain User‐Generated Content Based Model to Enrich Road Network Data for Multi‐Criteria Route Planning

By utilizing today's web‐based technologies, people can act as sensors and share their perceptions, emotions and observations in a variety of data forms, such as images, videos, texts, Global Positioning System (GPS) trajectories and maps. These forms are collectively called user‐generated content (UGC). These data are in different domains and have a multi‐modality nature. Although recent efforts have probed the acquisition of local knowledge by using single‐domain UGC data in specific applications, such efforts have not thus far presented a model considering multi‐domain UGC specifically to enrich road network data. This article aims at presenting such a model wherein, with the help of each data domain of UGC, one aspect of people knowledge about the road segment is obtained. These different aspects of knowledge are integrated using a Skyline operator to support multi‐criteria route finding. We name this model ERSBU (enriching road segments based on UGC). In ERSBU, road segments are basic spatial units, and their subjective properties have been extracted by using available UGC. The scenic score for each road segment was computed by using geo‐tagged Panoramio photos. The accessibility level of each road segment to different facilities was calculated based on data captured from Wikimapia and OpenStreetMap. Moreover, for measuring the movement popularity of each road segment, Wikiloc and Everytrail GPS trajectories were utilized. For the implementation of the ERSBU model, Tehran region 6 was considered the case study area. The Evaluation of the results proved that road segments that achieved a high score based on knowledge extracted from UGC also mostly gained top scores by analyzing traditional maps. ERSBU allows users to accomplish more‐qualitative path finding by considering the multi‐view characteristics of road segments.     

Defining Heritage Values and Significance for Improved Resource Management: an application to Australian tourism

The values and significance of heritage resources are often acknowledged but not integrated into the management process. This paper presents a framework for explicitly identifying these resource qualities and applying them to site management. It defines values in terms of a resource's intrinsic (objectively measurable) and extrinsic (largely subjectively measurable) qualities. The derivative assessment of significance then creates direction for decision making where conservation takes precedence over resource exploitation and renewable resource exploitation takes precedence over the exploitation of non-renewable resources. The framework, developed from a study of World Heritage values of the Great Sandy Region, Australia, provides a basis for achieving agreement between resource owners/managers and resource users on the nature of permissible activities using valued resources.     

Deceptive data? The role of the investigators in the New Survey of London Life and Labour 1928–32

The data collected by the New Survey of London Life and Labour between 1928 and 1932 is one of the most significant resources of detailed household information for the interwar period, with data extracted for almost 30,000 households, providing detailed information including birthplaces, hours of work, and wages. This article assesses the process of the original data collection, highlighting issues that mean users of the extracted data must proceed with a measure of caution. In particular, it demonstrates that one investigator employed by the survey, who provided information for around a fifth of households, appears to have regularly submitted generic and estimated information that problematizes the dataset.     

Cartographic,Geophysical and Diver Surveys of the Medieval Town Site at Dunwich,Suffolk, England

This paper presents the results of an integrated historical and geophysical survey of a medieval town lost through cliff recession and coastal inundation. Key objectives included evaluating historic maps in supporting the relocation and identification of major buildings, and applying integrated multibeam, side‐scan and sub‐bottom profiling to determine the location and extent of archaeological remains. The results demonstrate that cartographic sources from 1587 onwards can be a reliable source of data to guide geophysical survey. Integration of historical mapping with geophysical data enabled identification of the remains of two medieval structures, and the tentative identification of two others. © 2010 The Authors     

Zapotec innovation in a Mexican village: Building an autonomous mobile network

In 2013, a Zapotec village in the Mexican state of Oaxaca drew international attention when its citizens successfully created an autonomous mobile phone network. Using open‐source software and with technical assistance from an NGO (non‐governmental organization), the people of Talea de Castro obtained antennae, a base station and software that enabled them to build a fully functional mobile network with global reach. This article examines theoretical questions about the nature of innovation and the conditions that might help promote it. It also places the network in broad historical and social contexts. The article reviews the political, legal and technical processes by which villagers were able to create the network. For many years, Talea has been a centre of technological creativity and experimentation. The network might be seen as the village's latest innovation in a centuries‐long process in which creative problem‐solving is integrated with indigenous patterns of mutual aid, reciprocal labour and cooperativism. The article concludes with a discussion of the challenges facing the network and its users.     

Lost in the Mail: the Inherent Errors of Mapping Australia Post Postcodes to ABS Derived Postal Areas

It is now common practice, by users of geographic information, to link data held at the postcode level to that obtained from the national census. This paper examines the relationship between Australia Post (AP) postcodes and Australian Bureau of Statistics (ABS) derived postal areas — which are an approximation of the former based on aggregated census collection districts (CDs). A group of adjacent ABS postal areas in northwest Melbourne was compared with the true AP postcode areas they purported to represent and the discrepancies were investigated. Firstly, shape mismatches were studied and their potential impacts upon resource allocation decisions were assessed. Next, comparisons of areas were undertaken. It was found that, in established inner city urban areas, the two sets of boundaries were highly correlated. However, outer suburban neighborhoods were identified as being particularly prone to major areal discrepancies. The implications of mismatches between these two key boundary data sources may be severe, given that management decisions and the allocation of public and private resources are often based on spatial statistical analyses which use these data sets. The authors acknowledge ABS efforts in providing information at the levels of aggregation that society demands. The introduction of ABS postal areas data has undoubtedly facilitated the use of demographic data in many sectors; it has, however, also caused some problems, for instance, when users assume that ABS postal areas are identical to AP postcodes. These issues could easily be avoided with the inclusion of more comprehensive metadata documentation accompanying ABS data. Research is continuing to develop a method by which agencies may derive common boundaries for their administrative units, yet still meet their own individual data and sampling requirements.     

Toward Historical Ethnography: Notarial Records and Family History in the Middle Ages

One can easily use nineteenth-century tithe data of England and Wales in a Geographic Information System (GIS) to analyze a range of subjects, for example, land use, productivity, land ownership, or tenancy. Making the tithe data GIS ready, on the other hand, is a nontrivial matter. The tithe data consist of two main types: spatial, that is, the tithe map, and nonspatial attribute data linked to the map. The tithe therefore has the characteristics of a GIS, albeit in paper form. The author outlines the process of creating the structures for building a data repository that allows the storage and dissemination of both tithe schedules and maps in a single GIS-ready system. The author chose Oracle to host the repository. The Oracle Spatial module allows storage of both spatial and attribute information. Oracle also provides the means of serving data to users via the Internet.     

A Multi-objective Optimization Approach for Disaggregating Employment Data

In many countries, including South Africa, data on employment is rarely available on a downscaled level, such as building level, and is only available on less detailed levels, such as municipal level. The aim of this research was to develop a methodology to disaggregate the employment data that is available at an aggregate level to a disaggregate, detailed building level. To achieve this, the methodology consisted of two parts. First, a method was established that could be used to prepare a base data set to be used for disaggregating the employment data. Second, a multiobjective optimization approach was used to allocate the number of employment opportunities within a municipality to building level. The algorithm was developed using an Evolutionary Algorithm framework and applied to a case study in a metropolitan municipality in South Africa. The results showed favorable use of multiobjective optimization to disaggregate employment data to building level. By enhancing the detail of employment data, planners, policy makers, modelers and other users of such data can benefit from understanding employment patterns at a much more detailed level and making improved decisions based on disaggregated data and models.     

From Hand Survey to 3D Laser Scanning: A Discussion for Non-Technical Users of Heritage Documentation

Abstract

Digital technology has changed our approaches to cultural heritage documentation radically and promises to continue to bring rapid changes. Photographic and non-photographic (graphic) documentation tools are merging in one process, in which digital photographic technology is the main base. Due to digital technology, there is an increasing gap between specialist technicians and non-technical users involved in heritage documentation. 3D approaches are still not popular among users in cultural heritage. However, in order to build a bridge between the specialist and non-technical users, a dialogue between them needs to be developed, not only to discuss issues of data precision and 3D accuracy, but also visualization production systems, which can now easily be achieved by modern digital photographic technology.

This paper presents a comparative evaluation and synthesis of cultural heritage documentation methods and survey techniques currently available, focusing on the needs and requirements of non-technical users of heritage documentation. It attempts to clarify some new aspects in cultural heritage documentation and to assess the impact of current technology. The paper undertakes a comparative evaluation of the potential application of digital methods in documentation — and examines issues such as quality, accuracy, time, costs and specific skills required — from pre-electronic techniques (hand measurement) to 3D laser scanning, which today represents the most advanced technology available for measuring and documenting objects, structures and landscapes.     

Exploring the Phenomena of Online Dating Platforms Versus Saudi Traditional Spouse Courtship in the 21st Century

While traditional Saudi Arabian courtship is rigidly structured according to a set of Islamic codes of conduct, over the past decade, Saudis have increasingly turned to unconventional means of finding and courting a potential spouse: matrimonial Web sites. This research explores the debate in the literature on computer meditated communication regarding whether online settings provide rich information about other users, as they show that online interactions can provide more information about the opposite sex for users who belong to gender‐segregated societies than they can get through their offline lives. The article will shed some light on the interplay between young generations and their obsessions with the world of Internet dating and the societal norms and social conducts with which they are comfortable while living in Saudi Arabia. The article may contribute to the online dating literature by showing the similarities and differences between conservative, Islamic Saudi users and Western users when using Web sites to search for a potential mate. The research shows the power of both social and religious norms in affecting these users’ behaviors and decisions when using matrimonial Web sites.