wavelength
The 400 million machine powering the future of chipmaking
The AI era needs ever faster chips. ASML has a monopoly on the expensive contraptions needed to pattern them. Jos Benschop is climbing a ladder to get to the top of his newest machine. The contraption is the size of a double-decker bus--more than 150 tons of gleaming precision-milled aluminum covered in thousands of snaking tubes, colored cables, and pressurized tanks. From the ground, it looks like a futuristic V8 engine. When I reach the top with Benschop we're looking down from about 15 feet in the air, with bunny-suited technicians scurrying around below. It's more than 200 cubic meters of tech--"mechatronic devices that hold a few mirrors in a position with atomic precision," he says, gesturing at the gargantuan apparatus. Benschop, a tall and grizzled 66-year-old, has spent over a decade working with his engineers to design this thing, but even so, he'll sometimes look at it and go: Benschop is the executive vice president of technology for ASML, a Dutch company that is the linchpin of the microchip industry. If you want to make powerful chips to power phones or AI, a lithography machine like the one we're standing on is what you need to create increasingly tiny circuitry. Lithography is the art and science of shining light on a silicon wafer to pattern out the transistors, wiring, and other components of the microchips that will be cut from it. The chipmaking field is essentially controlled by only two big players: ASML, which creates the lithography machines, and TSMC, the chipmaking giant. Nine years ago, ASML began selling machines that use a daring new way of patterning chip features.
FRN: Fractal-Based Recursive Spectral Reconstruction Network
Generating hyperspectral images (HSIs) from RGB images through spectral reconstruction can significantly reduce the cost of HSI acquisition. In this paper, we propose a Fractal-Based Recursive Spectral Reconstruction Network (FRN), which differs from existing paradigms that attempt to directly integrate the full-spectrum information from the R, G, and B channels in a one-shot manner. Instead, it treats spectral reconstruction as a progressive process, predicting from broad to narrow bands or employing a coarse-to-fine approach for predicting the next wavelength. Inspired by fractals in mathematics, FRN establishes a novel spectral reconstruction paradigm by recursively invoking an atomic reconstruction module. In each invocation, only the spectral information from neighboring bands is used to provide clues for the generation of the image at the next wavelength, which follows the low-rank property of spectral data. Moreover, we design a band-aware state space model that employs a pixel-differentiated scanning strategy at different stages of the generation process, further suppressing interference from low-correlation regions caused by reflectance differences. Through extensive experimentation across different datasets, FRN achieves superior reconstruction performance compared to state-of-the-art methods. Code is available at https://github.com/mongko007/frn.
Color doesn't exist--at least not how you think
Color doesn't exist--at least not how you think That's why it's impossible to describe the color red. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. Our eyes know the color purple when we see it, but we'd find it really hard to describe it to someone who's never seen it. Breakthroughs, discoveries, and DIY tips sent six days a week. Red means Red means Red means The color conjures up a whole range of emotions and associations.
SU(2) = R(ฮธ, ฮธ, ฯ) = tkje P0 tkje T0 gkjt 0 ejฯWkjt 0 ejฮธL ฮธ! jฮธgsin 2 ฯcos 2 ฯej 2 0 = e cos
A.1 Mach-Zehnder Interferometers (MZIs) A basic coherent optical component used in this work is an MZI. One of the most general MZI structures is shown in Figure 15, consisting of two 50-by-50 optical directional couplers and four phase shifters ฮธ, ฮธ, ฯ, and ฯ. An MZI can achieve arbitrary 2 2 unitary matrices SU(2). Figure 15: 2-by-2 MZI with top (T), left (L), upper (P), and lower (W) phase shifters. A.2 MZI-based Photonic Tensor Core Architecture By cascading N(N 1)/2MZIs into a triangular mesh (Recks-style) or rectangular mesh (Clementsstyle), we can construct arbitrary N N unitary U(N).
2 cos
A.1 Mach-ZehnderInterferometers(MZIs) A basic coherent optical component used in this work is an MZI. To optimize the MZI meshes, a straightforward idea is to use first-order methods to optimize all rotationsphases ฮฆU,ฮฆV,andฮฆฮฃ. A similar sampling matrixPx is applied to input features. According to the experience from the field of structured/subspace neural networks, e.g., block-circulant neural nets, the block size is typically set to a number around 8. Here we add newresults onL2ight-SL (ฮฑW=ฮฑC=0.6, In conclusion, we recommend using multiple interconnected 9 9 PTCs for parallel computing, since this choice of 9 9 block balances both systematic performance, hardware complexity,robustness,andon-chiptrainability.
Water Quality Estimation Through Machine Learning Multivariate Analysis
Cardia, Marco, Chessa, Stefano, Micheli, Alessio, Luminare, Antonella Giuliana, Gambineri, Francesca
The quality of water is key for the quality of agrifood sector. Water is used in agriculture for fertigation, for animal husbandry, and in the agrifood processing industry. In the context of the progressive digitalization of this sector, the automatic assessment of the quality of water is thus becoming an important asset. In this work, we present the integration of Ultraviolet-Visible (UV-Vis) spectroscopy with Machine Learning in the context of water quality assessment aiming at ensuring water safety and the compliance of water regulation. Furthermore, we emphasize the importance of model inter-pretability by employing SHapley Additive exPlanations (SHAP) to understand the contribution of absorbance at different wavelengths to the predictions. Our approach demonstrates the potential for rapid, accurate, and interpretable assessment of key water quality parameters.
The View From Space: Navigating Instrumentation Differences with EOFMs
Demilt, Ryan P., LaHaye, Nicholas, Tenneson, Karis
Earth Observation Foundation Models (EOFMs) have exploded in prevalence as tools for processing the massive volumes of remotely sensed and other earth observation data, and for delivering impact on the many essential earth monitoring tasks. An emerging trend posits using the outputs of pre-trained models as 'embeddings' which summarize high dimensional data to be used for generic tasks such as similarity search and content-specific queries. However, most EOFM models are trained only on single modalities of data and then applied or benchmarked by matching bands across different modalities. It is not clear from existing work what impact diverse sensor architectures have on the internal representations of the present suite of EOFMs. We show in this work that the representation space of EOFMs is highly sensitive to sensor architecture and that understanding this difference gives a vital perspective on the pitfalls of current EOFM design and signals for how to move forward as model developers, users, and a community guided by robust remote-sensing science.
SCANS: A Soft Gripper with Curvature and Spectroscopy Sensors for In-Hand Material Differentiation
Hanson, Nathaniel, Allison, Austin, DiMarzio, Charles, Padฤฑr, Taลkฤฑn, Dorsey, Kristen L.
We introduce the soft curvature and spectroscopy (SCANS) system: a versatile, electronics-free, fluidically actuated soft manipulator capable of assessing the spectral properties of objects either in hand or through pre-touch caging. This platform offers a wider spectral sensing capability than previous soft robotic counterparts. We perform a material analysis to explore optimal soft substrates for spectral sensing, and evaluate both pre-touch and in-hand performance. Experiments demonstrate explainable, statistical separation across diverse object classes and sizes (metal, wood, plastic, organic, paper, foam), with large spectral angle differences between items. Through linear discriminant analysis, we show that sensitivity in the near-infrared wavelengths is critical to distinguishing visually similar objects. These capabilities advance the potential of optics as a multi-functional sensory modality for soft robots. The complete parts list, assembly guidelines, and processing code for the SCANS gripper are accessible at: https://parses-lab.github.io/scans/.
A Gaussian Process Model of Quasar Spectral Energy Distributions Andrew Miller
We propose a method for combining two sources of astronomical data, spectroscopy and photometry, that carry information about sources of light (e.g., stars, galaxies, and quasars) at extremely different spectral resolutions. Our model treats the spectral energy distribution (SED) of the radiation from a source as a latent variable that jointly explains both photometric and spectroscopic observations. We place a flexible, nonparametric prior over the SED of a light source that admits a physically interpretable decomposition, and allows us to tractably perform inference. We use our model to predict the distribution of the redshift of a quasar from five-band (low spectral resolution) photometric data, the so called "photo-z" problem. Our method shows that tools from machine learning and Bayesian statistics allow us to leverage multiple resolutions of information to make accurate predictions with well-characterized uncertainties.