Semiconductor devices such as LEDs and transistors generally consist of two halves: an n-type, which carries negative charge via electrons, and a p-type, which moves positive charge carriers called holes that are essentially electron voids. Both halves rely on contacts that allow electric current to flow in and out with minimal energy loss. These connections, known as ohmic contacts, have been an efficiency bottleneck in thin p-type GaN semiconductors for decades because of their high resistance.
New low-resistance contacts pave way for improved gallium nitride semiconductor devices
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A core assumption in any democracy is that citizens with access to information will make reasoned decisions on political candidates and policy issues. But a new study by UC Berkeley social scientists finds that Americans [...]
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As Americans prepared to celebrate the nation’s 250th birthday on the morning of July 4, sobering images flashed across their phones and TV screens. Hundreds of masked men marched through the streets of Washington carrying [...]
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Nations should do more to reduce uncertainty about the legal value of their positions on cyber activities, a new study says.This post was originally published on this site
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Refugees are more likely than native citizens to begin entrepreneurial ventures in their adopted countries, either by choice or because they have few other options. A new study offers insight into how refugees from common [...]
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Khadra Essa, a Somali-born Dutch citizen operating in Syria under the name Umm Qaqa al-Somali, is a wanted woman.This post was originally published on this site
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A new article by sociologists Tristan Bridges (University of California, Santa Barbara) and James W. Messerschmidt (University of Southern Maine) examines how AI-generated memes circulated on social media by President Donald Trump represent a significant [...]
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International human rights law protects migrants once they are within a state’s jurisdiction but stops short of recognizing the right to enter another country, according to a new analysis in the International Journal of Migration [...]
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The change was obvious—but in the end, things stayed about the same. Cornell researchers took advantage of online petition website Change.org’s gradual rollout of an artificial intelligence writing tool to gauge AI-enhanced language’s impact on [...]
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Despite contentious local debates about time zones and seasonal shifts, University of Queensland research shows there is no official global time zone system.This post was originally published on this site
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Communities across the country are debating the role mobile crisis response programs can play in emergency response. These programs typically take calls from 911 dispatchers involving mental health, substance use, welfare checks and other situations [...]
