372 research outputs found

    Differentiating the roles of IR measurement and simulation for power and temperature-aware design

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    In temperature-aware design, the presence or absence of a heatsink fundamentally changes the thermal behavior with important design implications. In recent years, chip-level infrared (IR) thermal imaging has been gaining popularity in studying thermal phenomena and thermal management, as well as reverse-engineering chip power consumption. Unfortunately, IR thermal imaging needs a peculiar cooling solution, which removes the heatsink and applies an IR-transparent liquid flow over the exposed bare die to carry away the dissipated heat. Because this cooling solution is drastically different from a normal thermal package, its thermal characteristics need to be closely examined. In this paper, we characterize the differences between two cooling configurations—forced air flow over a copper heatsink (AIR-SINK) and laminar oil flow over bare silicon (OIL-SILICON). For the comparison, we modify the HotSpot thermal model by adding the IR-transparent oil flow and the secondary heat transfer path through the package pins, hence modeling what the IR camera actually sees at runtime. We show that OIL-SILICON and AIR-SINK are significantly different in both transient and steady-state thermal responses. OIL-SILICON has a much slower short-term transient response, which makes dynamic thermal management less efficient. In addition, for OIL-SILICON, the direction of oil flow plays an important role by changing hot spot location, thus impacting hot spot identification and thermal sensor placement. These results imply that the power- and temperature-aware design process cannot just rely on IR measurements. Simulation and IR measurement are both needed and are complementary techniques.

    Keep Your Hands to Yourself! How Law Enforcement Intrusion into Education Records Makes Campus Title IX Courts Necessary: Why Our System Might Be Better Than Most

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    Sexual harassment deprives students of equal educational opportunities, and sexual crimes on campus have been and continue to be a serious threat to student safety. Congress established Title IX and the Family Education Rights and Privacy Act (FERPA), in part, to guarantee and safeguard both student records and student safety. However, Title IX and FERPA are difficult doctrines to harmonize, and implementing them present serious challenges for University administrations. This Note explores the University’s responsibility to protect students from sexual crimes and their responsibility to prosecute the perpetrators, while simultaneously protecting student records and student confidentiality. This Note also explores the tension between the University and law enforcement, the role of the University in prosecuting sexual crimes, the unintended financial costs of preserving an inefficient enforcement system, and observations from university systems abroad. Further, this Note posits solutions to harmonize our protective doctrines to ensure that student records are protected, sexual crimes are adequately and efficiently prosecuted, and due process rights for both victim and alleged perpetrator are adequately safeguarded
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