source: [tag=CC] ([tag=WRB] [tag=PRP] | □)
destination: [tag=CC] ([tag=WRB] [tag=PRP] | [□])
spec: The main difference between multiversion and lock models is that in MVCC locks acquired for querying ( reading ) data do n't conflict with locks acquired for writing data and so reading never blocks writing and writing never blocks reading . Together these two sections , also organized in roughly chronological order , are referred to as '' June Mail . Boutilier engineered the mechanical systems for a 340,000 square-foot addition to the Baltimore County Detention Center integrating special security and life safety requirements . Though with the schedules reduced this year - - fewer people had to travel about the city , with the information sieve finally linked in all the districts - - it might be just as quick to walk the entire route . It is the agency that allows these loopholes to exist by not identifying all parameters . The context of slow and volatile growth , currency misalignments , and trade imbalances may also undermine efforts to improve market access for the exports of developing countries . With his vivid use of color and juxtaposition of reality and imagination , the artist opens a new world of insights into the depth and breadth of engineering . This may be something LTD could handle . Devoted to increasing awareness of engineering , she works throughout the year speaking at local schools , participating in science and career fairs , and attending professional development seminars , all of which contribute to the education of the public about science , engineering , and technology careers . A bag with a generic Christmas / December holiday image on it might make a good puzzle-race puzzle to use as a holiday party activity .