Database independent Migration of Objects into an Object-Relational Database

This paper reports on the CERN-based WISDOM project which is studying the serialisation and deserialisation of data to/from an object database (objectivity) and ORACLE 9i.Comment: 26 pages, 18 figures; CMS CERN Conference Report cr02_01

A database model for object dynamics.

Object-oriented database systems, Dynamic object re-classification, Object role model, Dynamic class hierarchy, Object migration

Enabling On-Demand Database Computing with MIT SuperCloud Database Management System

The MIT SuperCloud database management system allows for rapid creation and flexible execution of a variety of the latest scientific databases, including Apache Accumulo and SciDB. It is designed to permit these databases to run on a High Performance Computing Cluster (HPCC) platform as seamlessly as any other HPCC job. It ensures the seamless migration of the databases to the resources assigned by the HPCC scheduler and centralized storage of the database files when not running. It also permits snapshotting of databases to allow researchers to experiment and push the limits of the technology without concerns for data or productivity loss if the database becomes unstable.Comment: 6 pages; accepted to IEEE High Performance Extreme Computing (HPEC) conference 2015. arXiv admin note: text overlap with arXiv:1406.492

Migration and Regional Convergence in the European Union

Migration and Regional Convergence in the European Union European migration trends in the last decade have been marked by a number of spectacular changes. In the course of the recent enlargement immigration to some EU15 countries from the CEECs has become remarkable. Nevertheless, the vast majority of the EU27 countries are net immigration countries. In face of the important immigration and the cohesion problem, the question arises whether migration had any effect on unemployment and GDP per capita levels in the 2000s. In this paper we use data from the Eurostat Regio Database and estimate whether EU regions reveal a process of convergence in unemployment and income and whether migration plays a role in this process. We further examine whether migration has a different impact on emigration and immigration regions or in converging and diverging regions. While we cannot find a significant impact of migration on unemployment, migration clearly affects per capita income growth.

Evaluating cloud database migration options using workload models

A key challenge in porting enterprise software systems to the cloud is the migration of their database. Choosing a cloud provider and service option (e.g., a database-as-a-service or a manually configured set of virtual machines) typically requires the estimation of the cost and migration duration for each considered option. Many organisations also require this information for budgeting and planning purposes. Existing cloud migration research focuses on the software components, and therefore does not address this need. We introduce a two-stage approach which accurately estimates the migration cost, migration duration and cloud running costs of relational databases. The first stage of our approach obtains workload and structure models of the database to be migrated from database logs and the database schema. The second stage performs a discrete-event simulation using these models to obtain the cost and duration estimates. We implemented software tools that automate both stages of our approach. An extensive evaluation compares the estimates from our approach against results from real-world cloud database migrations

Regional wage convergence in Spain : 1850-1930.

This paper presents a new regional database on real wages for Spain from 1850 to 1930. This evidence is used to analyze the evolution of wages across regions and occupations. Sub stantial wage convergence occurred from 1850 to 1914, despite low rates of internal migration. World War I and the subsequent globalization backlash were associated with a spectacular in crease in wage differentials. However, real wage convergence across Spanish provinces re sumed during the 1920s, this time accompanied by high rates of internal migrationWage convergence; Labor markets; Migration; Growth regressions;

Labour Market Outcomes and Skill Acquisition in the Host Country: North African Migrants Returning Home from the European Union

This paper studies the educational investment decisions of returning migrants while abroad in the context of their decisions about the choice of activity upon returning and the duration of migration. The theoretical model builds on Dustmann (1999), Dustmann and Kirchkamp (1992) and Mesnard (2004). Using data from the MIREM database we explore whether the type of skills acquired by migrants while abroad is related to the activity chosen upon return and the duration of migration. The results suggest that the type of education plays a significant role in the migration decisions of those returning as wage earners or self-employed. In particular, there is a clear positive relationship between being self-employed and having previously invested in vocational education in the host country. There is also a strong positive relationship between investing in university education abroad and becoming a wage earner. As international migration facilitates skill transfers between developed and developing countries, the economic development of the latter will increasingly depend on migrants' ability to access educational and vocational training in the developed world aside from university education. Returning migrants with vocational and professional training tend to be self-employed after returning home, and by so doing they contribute to reducing poverty in the host country.education, human capital, return migration, duration of migration

An Age-Period-Cohort Database of Inter-Regional Migration in Australia and Britain, 1976-96

Report prepared as part of a collaborative project on "Migration Trends in Australia and Britain: Levels and Trends in an Age-Period-Cohort Framework" funded by the Economic and Social Research Council and the Australian Research Council. This paper describes the way in which parallel databases of inter-regional migration flows for Australia and Britain, classified by five year ages and birth cohorts for four five year periods between 1976 and 1996. The data processing involves estimation of migration data for comparable spatial units, the reduction of the number of those units to a reduced set for ease of analysis, the extraction of migration data from official data files supplied by the Australian Bureau of Statistics and the Office for National Statistics, and the filling of gaps in these files through iterative proportional fitting for some of the British data. The final stage in preparation of the migration databases was to estimate the numbers of transitions (Australia) or movements (Britain) for age-period-cohort spaces. In principle, this last estimation involves a fairly simple interpolation or aggregation of age-time classified migration data, but in practice a great deal of detailed attention is required. A final section specifies the populations at risk to be used for each age-period-cohort observation plan to compute migration intensities