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At the glass transition temperature the resin in the composite softens and significantly increases thermal expansion; exceeding Tg then exerts mechanical overload on the board components - e.g. the joints and the vias. Below Tg the thermal expansion of the resin roughly matches copper and glass, above it gets significantly higher. As the reinforcement and copper confine the board along the plane, virtually all volume expansion projects to the thickness and stresses the plated-through holes. Repeated soldering or other exposition to higher temperatures can cause failure of the plating, especially with thicker boards; thick boards therefore require high Tg matrix.

Along with vias, what makes up the components of a board?
Answer: joints
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Gaddafi financially supported other militant groups across the world, including the Black Panther Party, Nation of Islam, Tupamaros, 19th of April Movement and Sandinista National Liberation Front in the Americas, the ANC among other liberation movements in the fight against Apartheid in South Africa, the Provisional Irish Republican Army, ETA, Sardinian nationalists, Action directe, the Red Brigades, and the Red Army Faction in Europe, and the Armenian Secret Army, Japanese Red Army, Free Aceh Movement, and Moro National Liberation Front in Asia. Gaddafi was indiscriminate in the causes he funded, sometimes switching from supporting one side in a conflict to the other, as in the Eritrean War of Independence. Throughout the 1970s these groups received financial support from Libya, which came to be seen as a leader in the Third World's struggle against colonialism and neocolonialism. Though many of these groups were labelled "terrorists" by critics of their activities, Gaddafi rejected such a characterisation, instead considering them revolutionaries engaged in liberation struggles.

What was the Third World fighting against in the 1970s?
Answer: colonialism and neocolonialism
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A fundamental problem with software testing is that testing under all combinations of inputs and preconditions (initial state) is not feasible, even with a simple product.:17-18 This means that the number of defects in a software product can be very large and defects that occur infrequently are difficult to find in testing. More significantly, non-functional dimensions of quality (how it is supposed to be versus what it is supposed to do)usability, scalability, performance, compatibility, reliabilitycan be highly subjective; something that constitutes sufficient value to one person may be intolerable to another.

What is the primary issue with running software testing?
Answer:
testing under all combinations of inputs and preconditions (initial state) is not feasible