Juval Lowy
Juval Lowy是一名经验丰富的软件设计师,同时也是IDesign公司(一家咨询和培训公司,其业务集中在使用微软的COM+和.NET平台进行面向组件设计方面)的负责人。Juval非常热爱面向组件编程,作为早期采用者,Juval在COM和.NET方面拥有独到的经验。Juval是《Visual Studio》杂志(以前的VBPJ/VCDJ)和《.NET》杂志的特约撰稿人,还经常作为发言人出现在主要的软件开发会议上。他在UC Berkeley Extension讲授COM和.NET。Juval以前是KLATencor公司(《财富》评出的500强公司之一)的软件体系结构经理,他在那里设计和开发在公司之间使用的大型框架和组件。Juval住在加利福尼亚的San Jose。可以通过站点http://www.componentware.net与他联系。
The animal on the cover of Programming WCF Services is an angelfish. Angelfish are found in tropical and subtropical reefs around the world; there are at least 86 different species. The average size of an angelfish is about 7 to 12 inches (20 to 30cm), but their size varies greatly, as does their coloring, which changes with maturity.
Their diet consists of algae, worms, and various shellfish and small sea creatures. A spine on the gill cover differentiates the angelfish from the also colorful butterfly fish. Depending on the species, angelfish have different mating habits. Some mate for life in territorial pairs, while others create harems of female fish with one dominant male. All angelfish are protogynous hermaphrodites, which means that if the dominant male were to die or leave the group, a female would morph into a male for mating purposes.
In some countries angelfish are used for food, but mostly they are caught for aquariums.
Rare species of angelfish can range in price from hundreds to thousands of dollars. In addition to collectors,angelfish are threatened by reef destruction and continual environmental degradation.