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At the same time, The Matrix extends its ideological play into the bodies of its audience, who experience the film’s thrillingly sensorial fantasies of constitutional rights while enjoying its affective special effects.
Open accessJournal ArticleDOI
Juan Maldacena, Alexey Milekhin 
41 Citations
We argue that the gravity dual is essentially the same as the one for the original matrix model.
Thus, we provide a new matrix pencil that preserves both the symmetric structure and the structural invariants, of the original 2-D polynomial matrix.
We argue that many of the old results can be carried over to this new setting and that the original claims about the deformed matrix model are essentially correct.
Open accessJournal ArticleDOI
Stephen Boyd, Lin Xiao 
129 Citations
When the original matrix has structure, such as sparsity, this observation allows us to solve very large least-squares covariance adjustment problems.
Open accessProceedings ArticleDOI
Biao Lu, Dong Wei, Brian L. Evans, Alan C. Bovik 
01 Nov 1998
24 Citations
We demonstrate that two of the proposed methods significantly outperform both the original matrix pencil method and the modified Kumaresan-Tufts (1982) method, especially at low signal-to-noise ratio.
Moreover, we show how to exploit the structure of the proposed matrix pencils in Krylov-type methods, so that in this case we only have to deal with linear system solves of matrices of the original matrix polynomial dimension.
We show that, for suitable choices of the matrix coefficients P and Q, it is possible to characterize by means of φ ( z ) well known matrix functions, namely the matrix square root, the matrix polar factor, the matrix sign and the geometric mean of two matrices.

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How can distances in transport be classified?
5 answers
Distances in transport can be classified based on their unique characteristics and applications. One classification method involves introducing new classes of distances between nonnegative Radon measures, which interpolate between Wasserstein and Sobolev distances, considering dynamical costs and densities of intermediate configurations. Another approach involves the study of a transport-based distance, the $TL^p$ distance, which combines Lagrangian and intensity modeling for general, non-positive, and multichanneled signals, allowing for direct applicability to various signal types and images. Additionally, trajectories can be classified based on spatial representations using distinct classifiers or vectorized approaches, with the latter proving to be simple, efficient, and highly effective in transportation mode classification tasks.
How do hearing aids work?
4 answers
Hearing aids function through various mechanisms. They can amplify ambient sounds by selectively emitting white noise to enhance the ear's sensitivity threshold. Additionally, some hearing aids utilize electromyography to detect muscle activity in the auricular muscle, decoding the user's intention to adjust the device's operating mode. Furthermore, a hearing aid may include a wireless interface, processor, and antenna to emit and receive electromagnetic fields, with a decoupling element ensuring optimal performance at the antenna's frequency. Moreover, advanced hearing aid systems continuously monitor audio input signals and EEG-related brain activity to adjust processing modes based on signal comparisons and cognitive load assessments. Finally, adaptive beamforming techniques with complex frequency-dependent parameters and covariance smoothing are employed to enhance signal processing in hearing aids.
What are some results of expected angular error of DOA?
5 answers
The expected angular error of Direction Of Arrival (DOA) estimation has been a focus in various studies. In experiments with different antenna systems, errors have been investigated and mitigated. For instance, in one study, errors were initially around ±12 degrees due to hardware issues, but through error compensation techniques, the error was reduced to around ±3 degrees. Another study proposed a method that achieved an average estimation error of about 1.4° in simulations and experiments, showcasing effective DOA estimation. Additionally, a method based on steering vector estimation under expected DOA errors demonstrated robustness and improved SINR performance in adaptive array signal processing applications. These findings highlight the importance of addressing and minimizing angular errors in DOA estimation for enhanced accuracy in various communication scenarios.
How does surface electromyography (sEMG) compare to other methods for assessing iliopsoas activity and function?
4 answers
Surface electromyography (sEMG) is a valuable technology for assessing muscle activation, including the iliopsoas, due to its non-invasive nature and ability to reflect neuromuscular activity. sEMG involves signal analysis techniques like digital processing and machine learning, making it a promising tool for identifying muscular disorders and abnormalities. Studies have shown that sEMG can accurately estimate muscle force in various tasks, including isometric voluntary flexions and standing activities, with high precision and efficiency compared to other methods like Artificial Neural Networks and Supported Vector Machines. Additionally, advancements in sEMG signal processing have led to the development of integrated hardware and software systems that automate signal analysis, providing key indicators of muscle activation intervals and amplitudes for easy interpretation.
What are the advantages and disadvantages of using the NEC?
4 answers
The New Engineering Contract (NEC) offers simplicity, flexibility, and good management stimulus in various contract types. However, NEC violations can occur in gravity duals, impacting renormalization group flows and c-functions in quantum field theories. In the medical field, NEC is a significant contributor to mortality in premature infants, with high incidence rates and challenging diagnosis criteria. Additionally, NEC is used as a metric for PET scanner performance, where noise equivalent counts (NEC) affect signal-to-noise ratios in imaging studies. The NEC suite of contracts imposes detailed program management requirements on contractors, distinguishing it from other contract forms. Therefore, while NEC contracts promote efficiency and management, they can also present challenges such as NEC violations in theoretical physics, high mortality rates in premature infants, and complexities in PET scanner performance assessment.
Is algea growth connected to paracetamol?
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Paracetamol, a commonly used drug, has been studied for its effects beyond pain relief. Research has shown that paracetamol can modulate Staphylococcus aureus biofilm formation, potentially enhancing it, particularly in certain genetic backgrounds. On the other hand, the product of bacterial degradation of paracetamol has been found to stimulate the accumulation of biologically active substances in medicinal plants, significantly increasing biomass and flavonoid content in Calendula officinalis flowers. However, there is no direct evidence linking algal growth to paracetamol in the provided contexts. While paracetamol's impact on bacterial biofilms and plant growth is evident, further research is needed to determine its potential effects on algae growth.
Are density logs variable in silicalstic?
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Density logs can vary in siliciclastic rocks due to factors like diagenetic transitions and the presence of different chemical elements affecting accuracy. Siliciclastic rocks, especially those with low mechanical properties, may not conform to widely used equations like the Warren equation for density determination. Diagenetic boundaries, such as the transition from opal-A to opal-CT, significantly impact physical properties and logging data, leading to variations in density logs. Errors in log-derived rock densities can arise from varying A/Z ratios of chemical elements and neglecting photoelectric absorption, especially in the presence of heavier elements, necessitating correction factors for accurate density measurements. Therefore, the variability in density logs in siliciclastic rocks underscores the importance of considering diagenetic effects and elemental composition for precise density determinations.
Is there something to do against tinnitus?
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There are several approaches to address tinnitus. Pharmacological interventions have been explored, but no medication has reliably led to long-term reduction or disappearance of the symptom for most sufferers. Acoustic-physical treatments, such as acoustic devices, have shown limited influence on tinnitus, with fitted hearing aids potentially slightly reducing its prominence. Cognitive-behavior therapy has emerged as consistently beneficial in improving overall well-being and reducing tinnitus annoyance. Additionally, a device has been designed to electronically reduce stressed hearing during exposure to loud sounds, aiming to protect against tinnitus development without the need for manual adjustments by the user. Overall, a combination of approaches, including cognitive-behavior therapy and potentially tailored acoustic interventions, may offer relief for individuals experiencing tinnitus.
What is edge computing?
5 answers
Edge computing is an emerging paradigm that involves offloading computations and analytics workloads to IoT edge devices, aiming to enhance computation efficiency, reduce signal transmission channel occupation, and alleviate storage and computation burdens on cloud servers. It optimizes performance and user experience in modern computing systems by processing data locally near physical endpoints, reducing reliance on centralized servers or clouds. This approach addresses communication delays in applications requiring immediate responses, with a focus on real-time information processing and data intelligence. Edge computing leverages lightweight algorithms and application-specific hardware platforms for tasks like signal acquisition, preprocessing, feature extraction, and pattern recognition, making it valuable for IoT-based machine signal processing and fault diagnosis.
What is vfx?
5 answers
Visual Effects (VFX) encompass the digital techniques used in film and television to enhance storytelling through the creation of captivating visual elements. VFX involves the manipulation and integration of computer-generated imagery to produce effects that may be challenging or impossible to achieve through practical means alone. VFX breakdowns, like those seen in blockbuster cinema, showcase the intricate work behind these effects, although they often omit the labor-intensive process and time required for their creation. VFX production involves collaboration between artists and production teams, with a need for specialized training to navigate the complex tools and technologies involved. The continuous advancement of VFX technologies, such as real-time rendering engines, has revolutionized the industry, allowing for more efficient and visually stunning effects creation.
What are the most commonly used techniques for processing and analyzing EMG signals in clinical research?
5 answers
Surface electromyography (EMG) signals in clinical research are commonly processed using feature extraction, dimensionality reduction techniques, and machine learning classifiers. Additionally, artificial neural networks (ANNs) are utilized for pattern identification in EMG signal recordings, enabling interaction with technological devices. Frequency analysis of EMG signals aids in movement classification, with methods like Hilbert envelope and Fast Fourier Transform (FFT) coefficients being employed for signal processing. These techniques allow for the extraction of valuable information from EMG signals, facilitating applications in clinical diagnostics, prosthetic device monitoring, biomedicine, and human-machine interactions. The integration of these methods showcases the versatility and effectiveness of EMG signal processing in various clinical research settings.