Typical Specifications (Dual Channel) Parameters / Model # SRF-24120910-D1 SRF-35121010-D1 SRF-77121210-D1 RF frequency 24.150 GHz 35.500 GHz 76.500 GHz Transmitter output power +10 dBm (typical) +10 dBm (typical) +10 dBm (typical) Receiver conversion loss 9 dB (typical) 10 dB (typical) 12 dB (typical) IF bandwidth DC to 100 MHz (minimum) DC to 100 MHz (minimum) DC to 100 MHz (minimum) I/Q Chan...

Lunar laser ranging has provided many of the best tests of gravitation since the first Apollo astronauts landed on the Moon. The march to higher precision continues to this day, now entering the millimeter regime, and promising continued improvement in scientific results. This review introduces key aspects of the technique, details the motivations, observables, and results for a variety of scie...

Nonlethal exposure of honey bees to thiamethoxam (neonicotinoid systemic pesticide) causes high mortality due to homing failure at levels that could put a colony at risk of collapse. Simulated exposure events on free-ranging foragers labeled with a radio-frequency identification tag suggest that homing is impaired by thiamethoxam intoxication. These experiments offer new insights into the conse...

Mather and colleagues provide an impressive cross-level account of how arousal levels modulate behavior, and they support it with data ranging from receptor pharmacology to measures of cognitive function. Here we consider two related questions: (1) Why should the brain engage in different arousal levels? and (2) What are the predicted consequences of age-related changes in norepinephrine signal...

But as developmental neuropsychiatrist Martin H. Teicher reveals, scientists are discovering some startling connections between abuse of all kinds and both permanent debilitating changes in the brain and psychiatric problems ranging from panic attacks to posttraumatic stress disorder. In these surprising physical consequences of psychological trauma, Teicher sees not only a wake-up call for our...

Helicobacter pylori infection is chronic and very common. Its clinical consequences vary widely, ranging from being asymptomatic and clinically insignificant in many cases to causing dyspepsia, peptic ulcer disease, and gastric malignancy in others. Care must be used in deciding whom to test for H pylori infection, as a positive result mandates treatment, making broad-based screening impractical.

Superficial cutaneous burns following lightning strike may vary in patterns ranging from linear burns, punctate burns, feathering burns, and thermal burns. Contact with an extrinsic object in the pathway of lightning current can lead to disastrous consequences. The lucky who survive may show bizarre and interesting burn patterns to tell their story.

Property rights provide incentives to create information but they also provide incentives to hoard it prior to the award of protection. All-or-nothing rights, in particular, limit prior sharing. An unintended consequence is to slow, not hasten, forward progress when innovation hinges on combining disparately owned private ideas. In response, we propose a solution based on a reward definition of...

Interactive software, systems and devices are typically designed for a specific (set of) purpose(s) and the design process used ensures that they will perform satisfactorily when used as specified. In many cases users will use these systems in unintended and unexpected ways where it seems appropriate, which can lead to problems as the differing usage situations have unintended effects on use. W...

Since the invasion of Iraq in 2003, the United States has sought to encourage institutional developments in Iraq that would contribute to national reconciliation and mitigate sectarian and insurgent violence. In these reform efforts, including recent “benchmarks,” the Bush administration has drawn on power-sharing and federalist models. The purpose of these efforts is to overcome the political ...