Allyson Chiu

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Like backscatter X-ray machines, millimeter wave scanners produce detailed full-body images of passengers, but they do it with ultrahigh-frequency millimeter wave radiation rather than X-rays. If you went on name alone, you might think "advanced imaging technology machines" could help doctors hunt for tumors or other medical conditions. In reality, the label -- euphemism, if you're cynical -- adopted by the U.S. Transportation Security Administration (TSA) describes the whole-body scanners found at airports that detect weapons, explosives or other threats being carried on passengers. According to the TSA's Web site, the agency had installed 800 advanced imaging technology machines at 200 U.S. November 2012. The machines come in two flavors, based on the type of electromagnetic radiation they use to make a scan. Backscatter machines -- about 30 percent of the installations -- send low-energy X-rays to bounce off a passenger's body. Millimeter wave (mmw) scanners emit energy more akin to microwaves. Both see through clothing to produce a 3-D image of the person standing in the machine.
What we're talking about here is electrotactile stimulation for sensory augmentation or substitution, an area of study that involves using encoded electric current to represent sensory information -- information that a person cannot receive through the traditional channel -- and applying that current to the skin, which sends the information to the brain. The brain then learns to interpret that sensory information as if it were being sent through the traditional channel for such data. In the 1960s and '70s, this process was the subject of ground-breaking research in sensory substitution at the Smith-Kettlewell Institute led by Paul Bach-y-Rita, MD, Professor of Orthopedics and Rehabilitation and Biomedical Engineering at the University of Wisconsin, Madison. Now it's the basis for Wicab's BrainPort technology (Dr. Bach-y-Rita is also Chief Scientist and Chairman of the Board of Wicab). Eyeglasses are a typical example of sensory augmentation. Braille is a typical example of sensory substitution -- in this case, you're using one sense, touch, to take in information normally intended for another sense, vision.|Russia’s audacious military assault on Ukraine is the first major clash marking a new order in international politics, with three major powers jostling for position in ways that threaten America’s primacy. The challenges are different than those the U.S. Cold War. Russia and China have built a thriving partnership based in part on a shared interest in diminishing U.S. The challenges are different than those the U.S. Cold War. Russia and China have built a thriving partnership based in part on a shared interest in diminishing U.S. Unlike the Sino-Soviet bloc of the 1950s, Russia is a critical gas supplier to Europe, while China isn’t an impoverished, war-ravaged partner but the world’s manufacturing powerhouse with an expanding military. In deploying a huge force and on Thursday ordering what he called a “special military operation,” Russian President Vladimir Putin is demanding that the West rewrite the post-Cold War security arrangements for Europe and demonstrated that Russia has the military capability to impose its will despite Western objections and economic sanctions.
With that in mind, we're going to compare and contrast the two technologies across a variety of parameters, starting with the kind of energy they emit. X-rays or Millimeter Waves? A volunteer stands inside a backscatter scanner during a demo at the Transportation Security Administration's Systems Integration Facility at Ronald Reagan National Airport on Dec. 30, 2009. Backscatter technology is one of two types of imaging technology that the U.S. Both types of scanners give off energy in the form of electromagnetic radiation, which exists in nature as waves of energy made from both electric and magnetic fields. These waves travel through space and come in various sizes, or wavelengths. Millimeter wave scanners produce a special type of microwaves with wavelengths that fall in a range exactly between 0.001 meters (1 millimeter) and 0.01 meters (10 millimeters). In other words, the waves emitted by mmw scanners are much larger and therefore have less impact on small structures, such as human proteins and nucleic acids.|Referring video object segmentation (R-VOS) is an emerging cross-modal task that aims to segment the target object referred by a language expression in all video frames. In this work, we propose a simple and unified framework built upon Transformer, termed ReferFormer. It views the language as queries. Directly attends to the most relevant regions in the video frames. Concretely, we introduce a small set of object queries conditioned on the language as the input to the Transformer. In this manner, all the queries are obligated to find the referred objects only. They are eventually transformed into dynamic kernels which capture the crucial object-level information, and play the role of convolution filters to generate the segmentation masks from feature maps. The object tracking is achieved naturally by linking the corresponding queries across frames. This mechanism greatly simplifies the pipeline. The end-to-end framework is significantly different from the previous methods. Extensive experiments on Ref-Youtube-VOS, Ref-DAVIS17, A2D-Sentences and JHMDB-Sentences show the effectiveness of ReferFormer.
UFO researchers and media descended on the farm, and the world first began to learn about crop circles. By the 1990s, crop circles had become something of a tourist attraction. In 1990 alone, more than 500 circles emerged in Europe. Within the next few years, there were thousands. Visitors came from around the world to see them. Some farmers even charged admission to their mysterious attractions. Crop-circle enthusiasts call themselves cereologists -- after Ceres, the Roman goddess of agriculture. Most cereologists (or "croppies," as they are sometimes called) believe that crop circles are the work of either extraterrestrials or plasma vortices. Crop circles are not just circles -- they can come in many different shapes. The most basic (and the most common) crop circle is the single circle. Circles may also come in sets of two (doublets), three (triplets) or four (quadruplets). Circles also may be enclosed in a thin outer ring. The stalks inside a crop circle are typically bent into what is known as a swirl pattern, and the circles may spin clockwise or counterclockwise.
Today cities in 41 states, Washington, D.C., and Puerto Rico have streets named for King. According to the University of Tennessee geographer Derek Alderman, the streets that bear his name were selected from areas that have higher African American populations than citywide averages. Most of America's MLK neighborhoods, from east Montgomery, Alabama, to Harlem in New York City, were born of legal or de facto racial segregation. And in the second half of the 20th century, they experienced the sharpest decline in urban industry, sending local jobs from the cities to suburbs. These historic events first caused, then structurally perpetuated, deprivation in MLK neighborhoods. Concentrated urban poverty affected the funding required to support schools, hospitals and other community services, especially after the economic recession of the 1970s. In many cities, the sinking socioeconomic status of African Americans was compounded by government neglect of their neighborhoods, leading to property devaluation, industrial pollution and disrepair. The result is that MLK neighborhoods have become what Alderman calls a "racialized" landscape.


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