منابع مشابه
Pulsar Searches — Tricks of the Trade 2 a Potted History of Pulsar Searching
The study of pulsars has come a long way since their accidental discovery as " scruff " on pen chart recordings of the radio sky at 81 MHz by Jocelyn Bell and Anthony Hewish at Cambridge some thirty years ago. The present sample of almost 800 objects is the result of an immense amount of observing time at the largest radio telescopes around the world. This article highlights the most exciting f...
متن کاملThe Potted Plant Packing Problem
In this article we describe a practical planning problem, the potted plant packing problem, and our first approaches to solve this problem. The transportation of plants is comparably expensive as they require careful treatment due to there sensitivity. For standardised transport, potted plants are loaded on transport trollies. The cost of transportation depends on the number of these trollies. ...
متن کاملInternational trade in meat: the tip of the pork chop.
This paper provides an original account of global land, water, and nitrogen use in support of industrialized livestock production and trade, with emphasis on two of the fastest-growing sectors, pork and poultry. Our analysis focuses on trade in feed and animal products, using a new model that calculates the amount of "virtual" nitrogen, water, and land used in production but not embedded in the...
متن کاملEthylene and postharvest performance of potted kalanchoë
The postharvest life of different cultivars of kalanchoë plants (Kalanchoë blossfeldiana Poelln.) varied widely. The display life of plants of ‘Nadia’ was much longer than that of plants of ‘Debbie’ (10 weeks compared with 7 weeks). During display life, senescing flowers were replaced by opening buds and the difference in display life was primarily a function of differences in life of the indiv...
متن کاملThe spread of pathogens through trade in pig meat: overview and recent developments.
A number of animal diseases can be transmitted to pigs via meat if the animals are fed scraps of meat imported from infected countries. For this reason, garbage feeding of pigs is regulated in many countries. The major porcine diseases recognised as being significant for this transmission pathway are foot and mouth disease, African swine fever, classical swine fever and swine vesicular disease....
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ژورنال
عنوان ژورنال: The Lancet
سال: 1881
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(02)34030-3