Problem: Cordwood construction can save significant space and was often used with wire-ended components in applications where space was at a premium (such as missile guidance and telemetry systems) and in high-speed computers, where short traces were important. In cordwood construction, axial-leaded components were mounted between two parallel planes. The components were either soldered together with jumper wire, or they were connected to other components by thin nickel ribbon welded at right angles onto the component leads. To avoid shorting together different interconnection layers, thin insulating cards were placed between them. Perforations or holes in the cards allowed component leads to project through to the next interconnection layer. One disadvantage of this system was that special nickel-leaded components had to be used to allow the interconnecting welds to be made. Differential thermal expansion of the component could put pressure on the leads of the components and the PCB traces and cause physical damage (as was seen in several modules on the Apollo program). Additionally, components located in the interior are difficult to replace. Some versions of cordwood construction used soldered single-sided PCBs as the interconnection method (as pictured), allowing the use of normal-leaded components.
What type of construction is best for applications that need to portion space carefully?
---
Answer: Cordwood


Problem: Early on, American courts, even after the Revolution, often did cite contemporary English cases. This was because appellate decisions from many American courts were not regularly reported until the mid-19th century; lawyers and judges, as creatures of habit, used English legal materials to fill the gap. But citations to English decisions gradually disappeared during the 19th century as American courts developed their own principles to resolve the legal problems of the American people. The number of published volumes of American reports soared from eighteen in 1810 to over 8,000 by 1910. By 1879 one of the delegates to the California constitutional convention was already complaining: "Now, when we require them to state the reasons for a decision, we do not mean they shall write a hundred pages of detail. We [do] not mean that they shall include the small cases, and impose on the country all this fine judicial literature, for the Lord knows we have got enough of that already."
What were the lawmakers beginning to drown in?
---
Answer: judicial literature


Problem: In 1165 Maimonides visited Jerusalem and prayed on the Temple Mount, in the "great, holy house". In 1141 Spanish-Jewish poet, Yehuda Halevi, issued a call to the Jews to emigrate to the Land of Israel, a journey he undertook himself. In 1187 Sultan Saladin, founder of the Ayyubid dynasty, defeated the Crusaders in the Battle of Hattin and subsequently captured Jerusalem and almost all of Palestine. In time, Saladin issued a proclamation inviting Jews to return and settle in Jerusalem, and according to Judah al-Harizi, they did: "From the day the Arabs took Jerusalem, the Israelites inhabited it." Al-Harizi compared Saladin's decree allowing Jews to re-establish themselves in Jerusalem to the one issued by the Persian king Cyrus the Great over 1,600 years earlier.
When did Maimonides visit Jerusalem?
---
Answer:
1165