Miracle-dz/UniFAR-FTUs huggingface dataset:
Deep, ultra‐high‐resolution radio imaging of submillimetre galaxies using Very Long Baseline Interferometry

We present continent-scale very-long-baseline interferometry (VLBI) – obtained with the European VLBI Network (EVN) at a wavelength of 18 cm – of six distant, luminous submillimetre-selected galaxies (SMGs). Our images have a synthesized beamwidth of ≈30 mas FWHM – three orders of magnitude smaller in area than the highest resolution Very Large Array (VLA) imaging at this frequency – and are capable of separating radio emission from ultra-compact radio cores (associated with active super-massive black holes – SMBHs) from that due to starburst activity. Despite targeting compact sources – as judged by earlier observations with the VLA and MERLIN – we identify ultra-compact cores in only two of our targets. This suggests that the radio emission from SMGs is produced primarily on larger scales than those probed by the EVN, and therefore is generated by star formation rather than an active galactic nucleus (AGN) – a result consistent with other methods used to identify the presence of SMBHs in these systems.
An Enhanced Adaptive Time Delay Control-Based Integral Sliding Mode for Trajectory Tracking of Robot Manipulators

This article proposes an enhanced adaptive time delay controller (ATDC) for robot manipulators subjected to external disturbances. This approach is model-free and uses time delay estimation (TDE) to estimate complex and unknown robot dynamics. First, to remove the reaching phase and improve the robustness of the control, an integral sliding surface (ISS) is used. Second, to speed up the convergence and compensate for the TDE errors and external disturbances, the gains of time delay control and the sliding mode have been made adaptive. In this article, we clearly point out using the Lyapunov method that the position and velocity tracking errors are guaranteed to be uniformly ultimately bounded (UUB). The effectiveness and the robustness of the designed controller over existing methods are experimentally verified on a parallel Delta robot. The novel model-free proposed control is robust and highly accurate, which is appropriate and recommended for industrial robotic applications.
Superfluid 4He dynamics beyond quasiparticle excitations

The dynamics of superfluid He4 at and above the Landau quasiparticle regime is investigated by high-precision inelastic neutron scattering measurements of the dynamic structure factor. A highly structured response is observed above the familiar phonon-maxon-roton spectrum, characterized by sharp thresholds for phonon-phonon, maxon-roton, and roton-roton coupling processes. The experimental dynamic structure factor is compared to the calculation of the same physical quantity by a dynamic many-body theory including three-phonon processes self-consistently. The theory is found to provide a quantitative description of the dynamics of the correlated bosons for energies up to about three times that of the Landau quasiparticles.
BLACK-HOLE–BULGE RELATIONSHIP OF POST-STARBURST QUASARS AT z ∼ 0.3

The MBH–σ* relation has been studied extensively for local galaxies, but to date there have been scarce few direct measurements of stellar velocity dispersions for systems beyond the local universe. We investigate black hole and host galaxy properties of six “post-starburst quasars” (PSQs) at z ∼ 0.3. Spectra of these objects simultaneously display features from the active nucleus including broad emission lines and a host galaxy Balmer absorption series indicative of the post-starburst stellar population. These are the first measurements of σ* in such objects, and we significantly increase the number of directly measured non-local objects on the MBH–σ* diagram. The “PSQs” of our sample fall on or above the locally defined MBH–σ* relation, a result that is consistent with previous MBH–σ* studies of samples at z > 0.1. However, they are generally consistent with the MBH–Lbulge relation. Furthermore, their location on the Faber–Jackson relation suggests that some of the bulges may be dynamically peculiar.
Mn valence instability in La2/3Ca1/3Mn03 thin films

A Mn valence instability on La2/3Ca1/3MnO3 thin films, grown on LaAlO3 (001)substrates is observed by x-ray absorption spectroscopy at the Mn L-edge and O K-edge. As-grown samples, in situ annealed at 800 C in oxygen, exhibit a Curie temperature well below that of the bulk material. Upon air exposure a reduction of the saturation magnetization, MS, of the films is detected. Simultaneously a Mn2+ spectral signature develops, in addition to the expected Mn3+ and Mn4+ contributions, which increases with time. The similarity of the spectral results obtained by total electron yield and fluorescence yield spectroscopy indicates that the location of the Mn valence anomalies is not confined to a narrow surface region of the film, but can extend throughout the whole thickness of the sample. High temperature annealing at 1000 C in air, immediately after growth, improves the magnetic and transport properties of such films towards the bulk values and the Mn2+ signature in the spectra does not appear. The Mn valence is then stable even to prolonged air exposure. We propose a mechanism for the Mn2+ ions formation and discuss the importance of these observations with respect to previous findings and production of thin films devices.
Hybrid demand forecasting models: pre-pandemic and pandemic use studies

Research background: In business practice and academic sphere, the question of which of the prognostic models is the most accurate is constantly present. The accuracy of models based on artificial intelligence and statistical models has long been discussed. By combining the advantages of both groups, hybrid models have emerged. These models show high accuracy. Moreover, the question remains whether data in a dynamically changing economy (for example, in a pandemic period) have changed the possibilities of using these models. The changing economy will continue to be an important element in demand forecasting in the years to come. In business, where the concept of just in time already proves to be insufficient, it is necessary to open new research questions in the field of demand forecasting. Purpose of the article: The aim of the article is to apply hybrid models to bicycle sales e-shop data with a comparison of accuracy models in the pre-pandemic period and in the pandemic period. The paper examines the hypothesis that the pandemic period has changed the accuracy of hybrid models in comparison with statistical models and models based on artificial neural networks. Models: In this study, hybrid models will be used, namely the Theta model and the new forecastHybrid, compared to the statistical models ETS, ARIMA, and models based on artificial neural networks. They will be applied to the data of the e-shop with the cycle assortment in the period from 1.1. 2019 to 5.10 2021. Whereas the period will be divided into two parts, pre-pandemic, i.e. until 1 March 2020 and pandemic after that date. The accuracy evaluation will be based on the RMSE, MAE, and ACF1 indicators. Findings & value added: In this study, we have concluded that the prediction of the Hybrid model was the most accurate in both periods. The study can thus provide a scientific basis for any other dynamic changes that may occur in demand forecasting in the future. In other periods when there will be volatile demand, it is essential to choose models in which accuracy will decrease the least. Therefore, this study provides guidance for the use of methods in future periods as well. The stated results are likely to be valid even in an international comparison.
Certificate-Based Signcryption Scheme for Securing Wireless Communication in Industrial Internet of Things

The Industrial Internet of Things (IIoT) community is concerned about the security of wireless communications between interconnected industries and autonomous systems. Providing a cyber-security framework for the IIoT offers a thorough comprehension of the whole spectrum of securing interconnected industries, from the edge to the cloud. Several signcryption schemes based on either identity-based or certificateless configurations are available in the literature to address the IIoT’s security concerns. Due to the identity-based/certificateless nature of the available signcryption schemes, however, issues such as key escrow and partial private key distribution occur. To address these difficulties, we propose a Certificate-Based Signcryption (CBS) solution for IIoT in this article. Hyperelliptic Curve Cryptosystem (HECC), a light-weight version of Elliptic Curve Cryptosystem (ECC), was employed to construct the proposed scheme, which offers security and cost-efficiency. The HECC utilizes 80-bit keys with fewer parameters than the ECC and Bilinear Pairing (BP). The comparison of performance in terms of computation and communication costs reveals that the proposed scheme provides robust security with minimal communication and communication costs. Moreover, we used Automated Validation of Internet Security Protocols and Applications (AVISPA) to assess the security toughness, and the results show that the proposed scheme is secure.
“You Know, I Swipe My Card and Hope for the Best”: Technology and Cognition as Dual Landscapes of Change

Mild cognitive impairment (MCI), or objective and subjective cognitive decline, affects an estimated 15%–20% of individuals over the age of 65 . People with MCI generally live in community settings but may be at risk for functional changes in out-of-home participation, particularly when their instrumental activities are cognitively demanding or complex. Technology is part of the interface in complex person-place relationships. The purpose of this study is to examine the nature of everyday technology use in the context of out-of-home participation for community-dwelling older adults with MCI. Community-dwelling older adults with MCI (MoCA <26, >17; (n = 10)) were recruited for data collection using a Go-along method (naturalistic observation, semi-structured interviews, and photography) for multiple out-of-home activities. Findings from this project suggested that participants felt that technology, like their cognition, was out of their control and difficult to predict or change. Four ways the participants experienced the “technology landscape” in their daily lives included: enabling being present, facilitating participation, impeding goals, and constricting options. We present a model of the intersection of cognition, participation, and technology in daily life, and discuss ways that technology can most effectively be used to extend well-being for a population aging in place.
Capital Market Consequence of Institutional Investment Constraint: Evidence from the Stock Price Crash Risk in China

ABSTRACT This study finds that institutional investment constraint increases stock price crash risk. We employ both instrumental variable approach and a quasi-experiment to identify the causal effect. We also find institutions are more likely to sell stocks with stronger institutional investment constraint in response to firm’s bad news. In addition, the positive relationship between institutional investment constraint and crash risk is less pronounced for institutions of larger size and better past performance. These results are consistent with managerial catering explanation rather than career concern and soft information explanations. Finally, the channel analysis shows that the effect of institutional investment constraint on crash risk is mediated by predatory selling and investor information competition.
Optical and Photovoltaic Properties of New Synthesized Quinoxaline-2,3 Dione Derivatives for Efficient Dye Sensitized Solar Cell Application

In this study, the synthesis of 4 new heterocyclic compounds derived from quinoxalinedione were presented, which have been characterized by 1H and 13C NMR spectroscopy. The solar cells’ photovoltaic properties based on these novels organic compounds donor-π-acceptor dyes were studied. Density functional theory DFT method is realized to optimize electronic parameters, optical and photovoltaic properties for some new 8-hydroxyquinoline derivatives based on quinoxaline-2,3-dione. The results have shown that time-dependent DFT (TDDFT) investigations with polarizable continuum model PCM were significantly able to foretell the excitation energy and the spectroscopy of the molecule. The highest occupied molecular orbital HOMO and the lowest unoccupied molecular orbital LUMO energy levels of these molecules can ensure a positive impact on the dye regeneration and electron injection process. Injection driving force ΔGinject, light-harvesting efficiency LHE, reorganization energy λtotal and open-circuit photovoltage Voc provide qualitative predictions on these dyes’ reactivity. Among these 4 molecules, the compounds which can be used as organic solar cells have determined. HIGHLIGHTS We presented the synthesis and the characterization of a new series of heterocyclic compounds obtained by association of 8-hydroxyquinoline with quinoxalindione derivatives. The synthesis of this series of compounds was carried out by simple conditions but with good yields and the characterization data shows that there is good consistency between the spectroscopic data and the proposed structures These new compounds were obtained according to simple procedures with good yields and they have been the subject of a theoretical study This investigated process can be employed to predict the optical and photovoltaics properties on the other compounds and polymers, and it encourages to synthesis the novel organic solar cell materials GRAPHICAL ABSTRACT
A tight scaling relation of dark matter in galaxy clusters

Recent studies in different types of galaxies reveal that the product of the central density and the core radius ($\rho_cr_c$) is a constant. However, some empirical studies involving galaxy clusters suggest that the product $\rho_cr_c$ depends weakly on the total dark halo mass. In this article, we re-analyse the hot gas data from 106 clusters and obtain a surprisingly tight scaling relation: $\rho_c \propto r_c^{-1.46 \pm 0.16}$. This result generally agrees with the claims that $\rho_cr_c$ is not a constant for all scales of structure. Moreover, this relation does not support the velocity-dependent cross section of dark matter if the core formation is due to the self-interaction of dark matter.
Clinicopathological Significance of STAT3 and p-STAT3 among 91 Patients with Adenocarcinoma of the Esophagogastric Junction

Adenocarcinoma of the esophagogastric junction (AEG) has increased rapidly worldwide during the last few decades. The purpose of this study is to investigate the clinical and prognostic characteristics of signal transduction and activator of transcription factor 3(STAT3) and phosphorylated STAT3 (p-STAT3) expression in AEG patients. We retrospectively analyzed the immunohistochemical results of 61 AEG patients and followed up for 5 years, while Western blot was performed on tissues from another 30 AEG patients. The results showed that STAT3 and p-STAT3 were overexpressed in AEG tissues (P < 0.05, P < 0.01). The high expression of STAT3 was significantly associated with the pTNM stage (P < 0.05), and the increased expression of p-STAT3 was significantly associated with depth of invasion (pT), lymph node metastasis (pN), and pTNM stage (P < 0.05, P < 0.05, P < 0.05). The 5-year survival rate for AEG patients was 41.0% and was significantly associated with tumor differentiation, pN, pTNM, and p-STAT3 (P < 0.05, P < 0.01, P < 0.05, P < 0.01). Cox regression analysis confirmed that tumor differentiation, pN, and high expression of p-STAT3 were independent risk factors for the 5-year survival rate in patients with AEG (P < 0.05, P < 0.01, P < 0.05). Our study showed that STAT3 and p-STAT3 play a critical role in AEG development.
Anti-inflammatory activity of ingredients from the heartwood of Vietnamese Dalbergia oliveri Gamble ex Prain

Objectives: To investigate the phytochemical constituents of Vietnamese Dalbergia oliveri and their inhibition of NO production. Methods: The ethyl acetate soluble fraction was subjected to column chromatography using silica gel and Sephadex LH-20 to isolate compounds. The chemical structures of isolated compounds were identified by nuclear magnetic resonance data and comparison with previously reported literature. The anti-inflammation effects of the isolated compounds on the lipopolysaccharide (LPS)-induced NO production in RAW 264.7 cells were measured using the Griess reaction. Results: Nine secondary metabolites (1−9) were isolated successfully from the heartwood of D. oliveri. The chemical structures of these compounds were identified as daidzein (1), formononetin (2), 3,7-dihydroxy-4′-methoxyflavone (3), liquiritigenin (4), 3′-methoxydaidzein (5), dalbergin (6), butin (7), sativanone (8), and isoliquiritigenin (9). This is the first time that compounds 1, 3, 5−8 have been isolated from D. oliveri. In the NO production inhibition, compounds 7 and 9 exhibited the most potent inhibitory activity, with IC50 values of 7.6 and 11.2 μM, respectively, followed by 3−6, with IC50 values from 19.6 to 28.7 μM. Conclusion: The results suggested that D. oliveri and its natural products might exert anti-inflammatory effects due to their NO-inhibiting actions.
Black shales and mesozonal quartz vein‐hosted Au: The Truchas Syncline, Spain and the Harlech Dome, Wales, a comparative study

A comparative study of quartz vein‐hosted gold occurrences associated with Palaeozoic metapelites in two areas of Wales and Spain combines new, previously unpublished and published data. Metamorphic grade is greenschist in both areas, but very low‐grade indicators in the host metapelites distance the environment from the greenschist/amphibolite transition zone required for some orogenic gold occurrences. Basin fertility for Au is indicated by the presence of auriferous pyrites in the protolith black shales in Spain. Only minor igneous activity has taken place in both study areas. Mineral parageneses are similar, with early sulphide phases characterized by As/Co and later auriferous phases by Cu/Pb/Zn sulphides. Mesozonal P–T conditions apply at deposition in both terranes. In Spain, mineralisation typically occurs in quartzites near to the metapelites, but not where the veins are in contact with them, and extensional faulting appears to be a stronger control over mineralisation than geochemical interaction with metapelite wall‐rocks. In Wales, both structural and geochemical factors (C content of the wall‐rocks and coupled oxidation of NH4 ions substituted in wall‐rock phyllosilicates to produce CH4 and N2) could have a role in Au deposition. In both areas, minor cross‐fault systems between larger faults are typical hosts of the mineralisation. Assignment is made to different subtypes of the orogenic gold model but these subtypes share the characteristic of a local source. This has implications for exploration methodology in epizonal/anchizonal metapelite‐dominated terranes, where indicators of basin fertility for Au within the protolith itself assume importance.
High-velocity-resolution observations of OH main line masers in the M82 starburst

Using the Very Large Array, a series of high-velocity-resolution observations have been made of the M82 starburst at 1.6 GHz. These observations follow up on previous studies of the main line OH maser emission in the central kiloparsec of this starburst region, but with far greater velocity resolution, showing significant velocity structure in some of the maser spots for the first time. A total of 13 masers were detected, including all but one of the previously known sources. While some of these masers are still unresolved in velocity, these new results clearly show velocity structure in spectra from several of the maser regions. Position-velocity plots show good agreement with the distribution of H I including interesting velocity structure on the blueward feature in the west of the starburst which traces the velocity distribution seen in the ionized gas.
Evidence for Secular Evolution of Disc Structural Parameters in Massive Barred Galaxies

We address the effects of bar-driven secular evolution in discs by comparing their properties in a sample of nearly 700 unbarred and barred (42 ± 3 per cent of the population) massive disc galaxies (M⋆ > 10 10 M⊙). We make use of accurate structural parameters derived from i-band bulge/disc/bar decompositions to show that, as a population, barred discs tend to have fainter central surface brightness (�µ0 � 0.25 mag), and disc scale lengths that are �15 per cent larger than those of unbarred galaxies of the same stellar mass. The corresponding distributions of µ0 and h are statistically inconsistent at the 5. 2σ and 3. 8σ levels, respectively. Bars rarely occur in high-surface brightness discs, with less than 5 per cent of the barred population having µ0 < 19.5 magarcsec −2 – compared to 20 per cent for unbarred galaxies. They tend to reside in moderately blue discs, with a bar fraction that peaks at (g i)disc � 0.95 mag and mildly declines for both bluer and redder colours. These results demonstrate noticeable structural differences between the discs of barred and unbarred galaxies, which we argue are the result of bar-driven evolution – in qualitative agreement with longstanding theoretical expectations.
Growth and Yield Variability in Rice Owing to Root Knot Nematode (Meloidogyne Graminicola) At Different Plant Age

Meloidogyne graminicola (nematode) mostly attacks young roots of plants; hence, age of host becomes a predominant factor in infection and pathogenesis. A pot experiment was conducted in the net house condition during kharif, 2018 in complete randomized design to find out the changes in growth and yield parameters of rice cv. Naveen due to inoculation of M. graminicola at different plant age. The nematode infested rice plants showed chlorosis, stunting and characteristic terminal galls on the roots which ultimately resulted in severe reduction in growth, unfilled spikelets, reduction in tiller development and other growth attributes over control. Nematode inoculation at early crop stage retarded the plant growth and yield attributes by reducing the rice yield up to 57.4%. The maximum percentage of reduction in plant height (19.8%), tiller number (39.6%), dry weight of shoot (43.6%), dry weight of root (45.6%) and total biomass (49.6%) was observed in the plants inoculated at two weeks after sowing. Bangladesh J. Bot. 51(3): 411-416, 2022 (September)
Modified Schottky Contact (Pd/MoOx) Based Filter-Free Spectrum-Selective Self-Powered Photodetector

This letter presents a modified Schottky contact utilizing <inline-formula> <tex-math notation="LaTeX">$MoO_{x}/Pd$ </tex-math></inline-formula> with Colloidal CdSe Quantum Dots to achieve spectrum selective self-powered photodetector. The detector shows a narrow FWHM of <inline-formula> <tex-math notation="LaTeX">$67 nm$ </tex-math></inline-formula> (centered around <inline-formula> <tex-math notation="LaTeX">$392 nm$ </tex-math></inline-formula>) under the self-bias conditions. The detector also exhibits improved responsivity, EQE, and detectivity of <inline-formula> <tex-math notation="LaTeX">$11.8 mA/W$ </tex-math></inline-formula>, 3.73 %, and <inline-formula> <tex-math notation="LaTeX">$1.74\times 10^{10} Jones$ </tex-math></inline-formula>, respectively, at <inline-formula> <tex-math notation="LaTeX">$\sim 392 nm$ </tex-math></inline-formula> under self-bias conditions. The optical properties of the device are also assessed using the Transfer Matrix Method (TMM). The numerically obtained results are also in agreement with the obtained photoresponse (within ~1.6%). The spectrum selective behavior and detector’s high figures of merit make it suitable for filter-free imaging applications under self-bias.