Miracle-dz/UniFAR-FTUs huggingface dataset:
Frame-to-Frame Visual Odometry Estimation Network With Error Relaxation Method

Estimating frame-to-frame (F2F) visual odometry with monocular images has significant problems of propagated accumulated drift. We propose a learning-based approach for F2F monocular visual odometry estimation with novel and simple methods that consider the coherence of camera trajectories without any post-processing. The proposed network consists of two stages: initial estimation and error relaxation. In the first stage, the network learns disparity images to extract features and predicts relative camera pose between adjacent two frames through the attention, rotation, and translation networks. Then, loss functions are proposed in the error relaxation stage to reduce the local drift, increasing consistency under dynamic driving scenes. Moreover, our skip-ordering scheme shows the effectiveness of dealing with sequential data. Experiments with the KITTI benchmark dataset show that our proposed network outperforms other approaches with higher and more stable performance.
Trace Formulas, a Golden-Thompson Inequality and Classicallimit in Boson Fock Space

Trace formulas for the heat semi-groups of second quantization operators and their perturbations in the abstract boson Fock space are given in terms of path (functional) integral representations. As applications, an inequality of Golden Thompson type and a classical limit are derived for the trace of the heat semi-group of a perturbed second quantization operator. The abstract results are applied to a model of P(,)-type in quantum field theory. 1996 Academic Press, Inc.
Effect of the number of vortices on the torque scaling in Taylor–Couette flow

Abstract Torque measurements in Taylor–Couette flow, with large radius ratio and large aspect ratio, over a range of velocities up to a Reynolds number of 24 000 are presented. Following a specific procedure, nine states with distinct numbers of vortices along the axis were found and the aspect ratios of the vortices were measured. The relationship between the speed and the torque for a given number of vortices is reported. In the turbulent Taylor vortex flow regime, at relatively high Reynolds number, a change in behaviour is observed corresponding to intersections of the torque–speed curves for different states. Before each intersection, the torque for a state with a larger number of vortices is higher. After each intersection, the torque for a state with a larger number of vortices is lower. The exponent, from the scaling laws of the torque, always depends on the aspect ratio of the vortices. When the Reynolds number is rescaled using the mean aspect ratio of the vortices, only a partial collapse of the exponent data is found.
Risk Communication Distributed among Migrant Workers during the COVID-19 Crisis in Thailand: Analysis on Structural and Networking Gaps

Language and cultural barriers among migrant workers hamper access to health risk information. This study aims to explore health risk communication structure and processes and identify the communication network of migrant workers during the COVID-19 pandemic in Thailand. This study used a parallel mixed-methods design combined with in-depth interviews and questionnaires for social network analysis from November 2020 to June 2021 in the headquarter district of Samut Sakhon, Ranong, and Phuket provinces. We conducted purposive sampling of representatives from public and non-public organisations and local communities. Thirty-six key informants participated in in-depth interviews, and fifty-six respondents completed the questionnaire for social network analysis. Although health risk communication included various activities, there was no formal governing body responsible for health risk communication among migrants, and monitoring and evaluation of communication process were not well-implemented. The health risk communication network was centralised, especially in the rural area; however, migrant health volunteers (MHVs) and local media were key sources of information for most migrants in communities. Overall, a governing body led by the government with intersectional collaboration and a health risk communication process should be promoted while considering migrants’ characteristics and concerns. The health risk communication network should identify key communicators such as MHVs and local media. This can be an effective strategy to fill the gap of information dependency.
Research on medical named entity recognition based on DB-MA-BiLSTM-CRF

At present, the uneven distribution of entities and the low frequency of some entities in medical text data leads to the low accuracy of medical named entity recognition. To solve the above problems, a neural network model based on dictionary and mutual attention (DB-MA-BiLSTM-CRF) is proposed. The model includes Bert embedding layer, BiLSTM-CNN layer, mutual attention layer and CRF layer. The medical dictionary is fused in the Bert embedding layer to inject medical vocabulary information; Then it is input into the BiLSTM-CNN network layer to extract the global and local features of the text respectively; The features extracted from BiLSTM-CNN network layer are spliced into the mutual attention layer for weighted extraction of important features. Compared with the two benchmark models, the experimental results show that the model proposed in this paper has strong advantages.
A detailed proof of the Chudnovsky formula with means of basic complex analysis -- Ein ausführlicher Beweis der Chudnovsky-Formel mit elementarer Funktionentheorie

In this paper we give another proof of the Chudnovsky formula for calculating $\pi$ -- a proof in detail with means of basic complex analysis. With the exception of the tenth chapter, the proof is self-contained, with proofs provided for all the advanced theorems we use (e.g. for the Clausen formula and for the Picard-Fuchs differential equation). -- In diesem Aufsatz wird die Chudnovsky-Formel zur Berechnung von $\pi$ erneut bewiesen -- wesentlich ausfuhrlicher, mit elementaren Methoden der Funktionentheorie und der Analysis. Die benotigten fortgeschrittenen Satze (z.B. die Clausen-Formel und die Picard-Fuchs-Differentialgleichung) werden ihrerseits ausfuhrlich bewiesen. Nur im zehnten Kapitel verweisen wir auf externe Quellen.
3.1 W mid-infrared fiber laser at 4.16 µm based on HBr-filled hollow-core silica fibers.

We present the characteristics of a continuous-wave (CW) mid-infrared fiber laser source based on HBr-filled hollow-core fibers (HCFs) made of silica. The laser source delivers a maximum output power of 3.1 W at 4.16 µm, showing a record value for any reported fiber laser beyond 4 µm. Both ends of the HCF are supported and sealed by especially designed gas cells with water cooling and inclined optical windows, withstanding higher pump power accompanied by accumulated heat. The mid-infrared laser exhibits a near-diffraction-limited beam quality with a measured M2 of 1.16. This work paves the way for powerful mid-infrared fiber lasers beyond 4 µm.
On the tree-likeness of hyperbolic spaces

Abstract Inside any proper hyperbolic geodesic space X we construct a rooted topological ${\mathbb R}$ -tree T that reflects the geometry of X in the following sense. All rays in T are quasi-geodesic in X. Every geodesic ray in X lies eventually close to a ray of T. The embedding of T in X extends continuously to their boundaries in a finite-to-one way, the number of boundary points of T mapping to a given boundary point of X being bounded if the (Assouad) dimension of the boundary of X is finite.
Superconductive Hot Electron Bolometer Mixers

Hot electron bolometer (HEB) mixers have made exceptional progress in recent years. These superconductive devices can operate well above the energy gap where current state-of-the-art SIS mixers begin to fail. Mixing results have been reported throughout the submillimeter range, up to several THz. The bolometer consists of a simple nanobridge that is biased near the center of the superconductive transition. Only about 0. 1μW of LO power is required. HEB mixers are expected to play a central role in astrophysical observations at THz frequencies and are currently under development for ground, aircraft, and space-borne observatories. This paper gives a short introduction to these unique sensors, a brief survey of the current status of the field, and some discussion of important topics related to future development.
Metaheuristic-Based Control for Three-Phase Grid-Connected Solar Photovoltaic Systems

In this paper, a novel cascade control technique is proposed in order to identify the parameters of cascade controllers in a grid-connected photovoltaic (PV) system. Here, tuning of the inner and outer loop controllers is done simultaneously by means of an optimized genetic algorithm-based fractional order PID (GA-FOPID) control. Simulations are conducted using Matlab/Simulink software under different operating conditions, namely under fast-changing weather conditions, sudden parametric variations, and voltage dip, for the purpose of verifying the effectiveness of the proposed control strategy. By comparing the results with recently published optimization techniques such as particle swarm optimization (PSO) and ant colony optimization (ACO), the superiority and effectiveness of the proposed GA-FOPID control have been proven.
Freshwater Trophic State of Sindang Heula Dam in Terms of Chlorophyl Content

This study aims to determine the trophic status of the waters of Sindang Heula Dam in terms of chlorophyll-a content and its relationship with other water parameters. The study was conducted in April 2021. The sampling location was determined by purposive sampling method with 5 stations. Sampling of chlorophyll-a was carried out using a composite sampling technique, which was then tested by spectrophotometric methods. Physical and chemical parameters of the waters measured included temperature, brightness, TSS, pH, DO, BOD, nitrate, nitrite, and phosphate. The results showed that the content of chlorophyll-a ranged from 12,733–63,457 g/L. Based on the results of the study, the waters of the Sindang Heula Dam have a eutrophic status to hypereutrophic, this indicates that the waters have been heavily polluted due to high levels of nutrients. ABSTRAK: Penelitian ini bertujuan untuk mengetahui status trofik perairan Bendungan Sindang Heula ditinjau dari kandungan klorofil-a serta hubungannya dengan parameter perairan lainnya. Penelitian dilakukan pada bulan April 2021. Lokasi pengambilan sampel ditentukan dengan metode purposive sampling sebanyak 5 stasiun. Pengambilan sampel klorofil-a dilakukan dengan teknik composite sampling, yang selanjutnya diuji dengan metode spektrofotometri. Parameter fisika dan kimia perairan yang diukur meliputi suhu, kecerahan, TSS, pH, DO, BOD, nitrat, nitrit, dan fosfat. Hasil penelitian menunjukkan bahwa kandungan klorofil-a berkisar 12,733–63,457 μg/L. Berdasarkan hasil penelitian maka perairan Bendungan Sindang Heula memiliki status eutrofik menuju hipereutrofik, hal ini menunjukkan perairan sudah tercemar berat akibat tingginya unsur hara.
Fluctuations in interacting particle systems with memory

We consider the effects of long-range temporal correlations in many-particle systems, focusing particularly on fluctuations about the typical behaviour. For a specific class of memory dependence we discuss the modification of the large deviation principle describing the probability of rare currents and show how superdiffusive behaviour can emerge. We illustrate the general framework with detailed calculations for a memory-dependent version of the totally asymmetric simple exclusion process as well as indicating connections to other recent work.
A W-Band GSG Probe Fabricated by Metal Additive Manufacturing

In this article, we present a new type of waveguide ground-signal-ground (GSG) probe for millimeter-wave (mmWave) on-wafer measurements. The proposed design integrates a GSG tip, a microcoaxial transmission line (TL), and a waveguide-to-coaxial transition in one structure. The waveguide port of the probe can be inserted into a section of the rectangular waveguide and then directly connected with the vector network analyzer (VNA). To optimize the contact force between the probe tip and the device under test (DUT), the inner and outer conductors of the GSG tip are designed to have different heights. To verify the performance of the proposed design, a W-band (75–110 GHz) prototype is fabricated based on the micrometal additive manufacturing (AM) technology. Due to the unique characteristics of AM technology, the probes can be fabricated in one piece and need no assembly, which significantly reduces the manufacturing cost and eases probe maintenance and repair. The measured results show 0.65–0.90-dB insert loss and over 15-dB return loss (RL) within the whole operating bandwidth, which validates the design mechanism and shows great potential for future economic subterahertz (THz) on-wafer measurements.
Galaxy and Mass Assembly (GAMA): Dust obscuration in galaxies and their recent star formation histories

We present self-consistent star formation rates derived through pan-spectral analysis of galaxies drawn from the Galaxy and Mass Assembly (GAMA) survey. We determine the most appropriate form of dust obscuration correction via application of a range of extinction laws drawn from the literature as applied to H , [Oii] and UV luminosities. These corrections are applied to a sample of 31 508 galaxies from the GAMA survey at z < 0:35. We consider several dierent obscuration curves, including those of Milky Way, Calzetti (2001) and Fischera and Dopita (2005) curves and their eects on the observed luminosities. At the core of this technique is the observed Balmer decrement, and we provide a prescription to apply optimal obscuration corrections using the Balmer decrement. We carry out an analysis of the star formation history (SFH) using stellar population synthesis tools to investigate the evolutionary history of our sample of galaxies as well as to understand the eects of variation in the Initial Mass Function (IMF) and the eects this has on the evolutionary history of galaxies. We nd that the Fischera & Dopita (2005) obscuration curve with an
The stellar phase density of the local Universe and its implications for galaxy evolution

This paper introduces the idea that the general mixing inequality obeyed by evolving stellar phase densities may place useful constraints on the possible history of the over-all galaxy population. We construct simple models for the full stellar phase space distributions of galaxies’ disk and spheroidal components, and reproduce the well-known result that the maximum phase density of an elliptical galaxy is too high to be produced collisionlessly from a disk system, although we also show that the inclusion of a bulge component in the disk removes this evolutionary impediment. In order to draw more general conclusions about the evolution of the galaxy population, we use the Millennium Galaxy Catalogue to construct a model of the entire phase density distribution of stars in a representative sample of the local Universe. In such a composite population, we show that the mixing inequality rules out some evolutionary paths that are not prohibited by consideration of the maximum phase density alone, and thus show that the massive ellipticals in this population could not have formed purely from collisionless mergers of a low mass galaxy population like that found in the local Universe. Although the violation of the mixing inequality is in this case quite minor, and hence avoidable with a modest amount of non-collisionless star formation in the merger process, it does confirm the potential of this approach. The future measurement of stellar phase densities at higher redshift will allow this potential to be fully exploited, offering a new way to look at the possible pathways for galaxy evolution, and to learn about the environment of star formation through the way that this phase space becomes populated over time.
Interpreting the conformal cousin of the Husain-Martinez-Nuñez spacetime

A 2-parameter inhomogeneous cosmology in Brans-Dicke theory, obtained by conformally transforming the Husain-Martinez-Nunez (HMN) scalar field solution of the Einstein equations is studied and interpreted physically. According to the values of the parameters it describes a wormhole, a naked singularity, or else a spacetime containing apparent black hole horizons which appear/disappear in pairs (as well as a cosmological horizon) as in the original HMN metric. The reasons why there isn't a one-to-one correspondence between conformal copies of this metric are discussed.
THE ALLEN TELESCOPE ARRAY FLY'S EYE SURVEY FOR FAST RADIO TRANSIENTS

The relatively unexplored fast radio transient parameter space is known to be home to a variety of interesting sources, including pulsars, pulsar giant pulses, and non-thermal emission from planetary magnetospheres. In addition, a variety of hypothesized but as-yet-unobserved phenomena such as primordial black hole evaporation and prompt emission associated with coalescing massive objects have been suggested. The 2007 announcement by Lorimer et al. of the detection of a bright (30 Jy) radio pulse that was inferred to be of extragalactic origin and the subsequent consternation have demonstrated both the need for wide-field surveys characterizing the fast-transient parameter space and the potential utility of bright radio pulses as probes of the interstellar medium and intergalactic medium. Here we present results from the 450 hr, 150 deg2 Fly's Eye survey for bright dispersed radio pulses at the Allen Telescope Array (ATA). The Fly's Eye Spectrometer produces 128 channel power spectra over a 209 MHz bandwidth, centered at 1430 MHz, on 44 independent signal paths originating with 30 independent ATA antennae. Data were dedispersed between 0 and 2000 pc cm−3 and searched for pulses with dispersion measures greater than 50 pc cm−3 between 625 μs and 5 s in duration. No pulses were detected in the survey, implying a limiting rate of less than 2 sky−1 hr−1 for 10 ms duration pulses having apparent energy densities greater than 440 kJy μs, or mean flux densities greater than 44 Jy. Here we present details of the instrument, experiment, and observations, including a discussion of our results in light of other single pulse searches.
Electronic-structure–induced reconstruction and magnetic ordering at the LaAlO3|SrTiO3 interface

Using local density approximation (LDA) calculations we predict GdFeO3-like rotation of TiO6 octahedra at the n-type interface between LaAlO3 and SrTiO3. This results in a narrowing of the Ti d bandwidth by 1/3 so that LDA+U calculations predict an antiferromagnetic, charge- and spin-ordered ground state for very modest values of U. Recent experimental evidence for magnetic interface ordering may be understood in terms of the close proximity of an antiferromagnetic insulating ground state to a ferromagnetic metallic excited state.
SABOCA 350-μm and LABOCA 870-μm dust continuum imaging of IRAS 05399-0121: mapping the dust properties of a pre- and protostellar core system

IRAS 05399-0121/SMM 1, which is a dense double-core system in Orion B9, was mapped with APEX/SABOCA at 350 micron. We combine these data with our previous LABOCA 870-micron data. The spatial resolution of the new SABOCA image, ~3400 AU, is about 2.6 times better than provided by LABOCA. We also make use of the Spitzer infrared observations to characterise the star-formation activity in the source. The filamentary source remains a double-core system on the 3400 AU scale probed here, and the projected separation between IRAS 05399 and SMM 1 is 0.14 pc. The temperature map reveals warm spots towards IRAS 05399 and the southeastern tip of the source. Both IRAS 05399 and SMM 1 stand out as peaks in the column density map. A simple analysis suggests that the density profile is of the form ~r^-(2.3_{-0.9}^{+2.2}), as determined at the position of SMM 1. The broadband spectral energy distribution of IRAS 05399 suggests that it is near the Stage 0/I borderline. A visual inspection of the Spitzer/IRAC images provides hints of a quadrupolar-like jet morphology around IRAS 05399, supporting the possibility that it is a binary system. The source splitting into two subcores along the long axis can be explained by cylindrical Jeans-type fragmentation but the steepness of the density profile is shallower than what is expected for an isothermal cylinder. The difference between the evolutionary stages of IRAS 05399 (protostellar) and SMM 1 (starless) suggests that the former has experienced a phase of rapid mass accretion, supported by the very long outflow it drives. The protostellar jet from IRAS 05399 might have influenced the nearby core SMM 1. In particular, the temperature map features are likely to be imprints of protostellar or shock heating, while external heating could be provided by the nearby high-mass star-forming region NGC 2024.
Uniqueness, the human pursuit of difference

I: A Case for Uniqueness. - 1 Literary Precedents for Uniqueness. - II: Need for Uniqueness: Theory and Research. - 2 Do Birds of a Feather Always Flock Together? - 3 Theory of Uniqueness. - 4 Corollaries of Uniqueness Theory: The Nature of the Comparison Other Persons. - 5 Individual Differences in Need for Uniqueness. - III: Uniqueness Attributes 103. - 6 Commodities as Uniqueness Attributes. - 7 Names as Uniqueness Attributes. - 8 Attitudes and Beliefs as Uniqueness Attributes. - 9 Performance as Uniqueness-Motivated Behavior. - IV: Uniqueness Seeking in Perspective. - 10 Deindividuation: Loss of Uniqueness. - 11 Individuation: The Pursuit of Difference.
The role of the joint program in survey methodology in training U.S. federal statisticians

The Joint Program in Survey Methodology (JPSM) was established in 1993 to support the U.S. federal statistical system by providing advanced training in survey statistics and methodology. Until then, traditional graduate degree programs did not provide the interdisciplinary training needed for large-scale surveys and censuses. Graduates of statistics departments were well-versed in advanced statistical estimation, but had little practical knowledge of how to design complex samples or how to develop survey instruments. A major part of JPSM’s mission is to fill that gap by providing graduate-level training to current and future federal statisticians. In this article we review the history of the program and its initial efforts, discuss the different types of collaboration and how they have enhanced survey methodology, and review efforts that are being made to strengthen the program and provide a more integrated research environment for the future.