Limiting DNS covert channels and network validated DNS

Despite the variety and number of network security devices and policies available, sensitive data, such as intellectual property and business data, can still be surreptitiously sent via the Internet to unscrupulous receivers. Furthermore, few security mechanisms address securing or limiting covert channels. This study defines a framework for determining a rule set to minimize covert channel capacity on the DNS protocol specifically. The information and techniques used in this study may be useful in aiding security professionals and developers with enforcing security policies on DNS and other Internet protocols.;This research resulted in the development of a rudimentary tool, referred to as NV-DNS, capable of detecting and effectively limiting the capability of covert channels in DNS communication packets

A Case Report of Hydrops Amnii

On March 24, 1955, I was called to see a 6-year-old Angus cow. A diagnoses of hydrops amnii was made. The exact freshening date was not known but was estimated to be about 3-4 weeks away. Since the fluid content had increased considerably in the last week it was decided to do a Caesarean section to save the cow

Northern Canadian Gardening: Compost Piles as a Means of Extending the Growing Range of Northern Crops

... The use of compost piles for growing frost-sensitive crops with long growing seasons holds considerable promise as a technique for northern domestic gardening, incorporating the benefits of direct garden seeding with those of conventional hot beds. The owners of most of the 50 gardens examined in Dawson in 1980 (McCracken and Revel, 1982) composted organic wastes, though none of them used compost piles for crop production. The abundance of compost piles and the successful growth of the volunteer cucumbers we observed suggests that this technique could be widely used throughout the north by those who wish to grow warmer-climate crops without a greenhouse, and without the need for bedding-out plants

Domestic and Commercial Vegetable Gardening in Dawson City, Yukon Territory, 1980

Canadian subarctic agriculture has not been a widespread practice. Because of increasing northern populations associated with industrial development, and the high cost of fresh produce, the practicality and success of subarctic gardening are examined. Dawson City was chosen for study because of its long history of gardening. In 1980 there were 50 domestic gardens, 56 greenhouses, and three commercial gardens which supplied produce both locally and to Whitehorse and Inuvik. The study documents the following crops: cabbage, cauliflower, broccoli, Brussels sprouts, carrots, turnips, kohlrabi, radish, beans, peas, potatoes, lettuce, kale, beetroot, Swiss chard, celery, onions, cucumber, tomatoes, zucchini, corn, peppers, leeks, squash, sunflowers and a large variety of herbs. The specific crop varieties used by gardeners are noted along with observations on their relative success, planting and harvesting dates and special gardening practices.Key words: agriculture, gardening, vegetable cultivationMots clés: agriculture, jardinage, culture de légume

The path to fusion power†

The promise, status and challenges of developing fusion power are outlined. The key physics and engineering principles are described and recent progress quantified. As the successful demonstration of 16 MW of fusion in 1997 in the Joint European Torus showed, fusion works. The central issue is therefore to make it work reliably and economically on the scale of a power station. We argue that to meet this challenge in 30 years we must follow the aggressive programme known as the ‘Fast Track to Fusion’. This programme is described in some detail