This paper presents a formal description and analysis of a technique for distributed rollback recovery. The setting for this work is a model for data-parallel computation with a notion of virtual time. The technique allows the selective undo of work at particular virtual times. A refinement theorem ensures the consistency of rollbacks.

Developing database applications with timeliness requirements is a difficult problem. During the execution of transactions, database applications (with timeliness requirements) have to deal with the possible occurrence of timing failures, when the operations specified in the transaction do not complete within the expected deadlines. In spite of the importance of timeliness requirements in datab...

INTRODUCTION The World Health Organisation recommends home visits conducted by Community Health Workers (in Uganda known as Village Health Teams--VHTs) in order to improve maternal and newborn health. This study measured the effect of home visits combined with mobile phone consultations on maternal and newborn care practices. METHOD In a community intervention trial design 16 health centres i...

As asthma is the most common noncommunicable disease in children worldwide, and as data sources (biomarkers, environmental data, connected objects) increase over years, it becomes possible to create very large datasets (big data) train algorithms with advanced techniques of artificial intelligence (AI).1 Soon, may be propose timely delivery effective personalized treatments for through algorith...

background: the increasing number of cesarean section is a great concern in many countries. in iran cesarean section rate has been steadily rising from 35% in 2000 to 40% in 2005. preferences for cesarean are often associated with some factors. objective: to investigate factors associated with preference for cesarean delivery, with special emphasis on pregnant women’s preferences in first pregn...

Introduction: Australian Standard 4080-2010 Planning for Emergencies in Health Care Facilities outlines the requirements all health care facilities to have procedures place respond internal and external emergencies. These must include mechanisms activate emergency response systems, staff should be trained familiar with these procedures. Method: To guide staff, Emergency Procedures Flip Charts b...