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Polarization images of solitonic boson stars
No full textThis study investigates the polarization characteristics of solitonic boson stars surrounded by a thin accretion disk. By comparing their polarization images with corresponding optical images, we find a positive correlation between the polarization intensity distribution in the polarization images and the brightness in the optical images. Consequently, the strongest polarization occurs at the location corresponding to the direct image. The influence of the coupling strength of the sixtic potential on the polarization intensity distribution is not monotonic, under strong coupling, the polarization will concentrated on the left side of the image as the coupling strength increases, whereas under weak coupling, it is more evenly distributed across the entire direct image as the coupling strength increases. Moreover, we find that as the initial scalar field increases, both the lensing image and photon ring become more prominent. However, the polarization intensity at these regions remains weak. Due to the absence of the event horizon in solitonic boson stars, the polarization vector can penetrate the stellar interior, unlike in black holes, where no polarization signals exist within the event horizon. Our numerical simulations clearly reveal this phenomenon, suggesting that polarization features may serve as an effective tool for distinguishing solitonic boson stars from black holes
Periodic orbits and quasinormal modes of a black hole surrounded by King dark matter halo
No full textWe examine the Hawking radiation sparsity and quasinormal mode (QNM) spectra of a Schwarzschild black hole surrounded by the King dark matter distribution. The modified metric, derived from the King density profile, yields altered expressions for the lapse function, mass, and Hawking temperature. The presence of dark matter reduces the Hawking temperature, indicating suppressed thermal emission. Analysis of radiation sparsity reveals its dependence on the horizon radius, with larger scale radius R and central density enhancing sparsity compared to the constant value in the Schwarzschild case. The photon sphere and shadow radius increase with R and , suggesting enlarged black hole shadows under dark matter influence. Hawking emission rates exhibit a downward shift in both peak intensity and frequency. The QNM spectra, obtained via the Mashhoon and 3rd-order Wentzel–Kramers–Brillouin (WKB) methods, show that both the oscillation frequencies and damping or decay rate decrease with the dark matter parameter . This study also examines how King dark matter halo affects periodic particle motion around a black hole, showing that it alters orbital stability and enhances precession, leading to transitions from bound to unbound motion. These results collectively demonstrate that King dark matter substantially modifies the thermodynamic and dynamical properties of black holes, offering potential observational imprints in black hole shadow and gravitational wave studies
NNLO QCD predictions for
No full textTriboson production processes play a crucial role in probing the electroweak sector of the Standard Model, as they involve quartic gauge-boson couplings already at the tree level. With these measurements entering the precision era at the Large Hadron Collider (LHC), accurate theoretical predictions become indispensable. We present the computation of the next-to-next-to-leading-order (NNLO) QCD radiative corrections to the production of a W boson in association with two photons () at the LHC. The calculation is exact, except for the finite part of the two-loop contribution, which is included in the leading-colour approximation. Predictions for the fiducial cross section and selected kinematic distributions are provided at a centre-of-mass energy of TeV, under standard experimental selection cuts. In line with observations for other multiboson processes involving direct photons, we find sizable NNLO corrections that enhance the next-to-leading-order predictions by about , with residual perturbative uncertainties that can be roughly estimated to be at the level
Nutritional profiling of instant analog rice made from edamame and seaweed flours: A mineral perspective
No full textThe increasing prevalence of type 2 diabetes mellitus (T2DM), which reached 11.7% in Indonesia in 2023, reflects a growing trend of non-communicable diseases. This indicates the need to strengthen T2DM prevention strategies to reduce metabolic and nutritional risk factors among patients. Micronutrients such as magnesium, calcium, iron, and zinc play important roles in glucose metabolism and insulin sensitivity. The development of nutritionally balanced foods has been explored, specifically instant analog rice made from edamame, which contributes magnesium (600 mg/kg) and zinc (32.8 mg/kg), and seaweed, which provides calcium (3200 mg/kg) and iron (45.6 mg/kg). This study aimed to determine the differences in magnesium, calcium, iron, and zinc content among various formulations of instant analog rice. The research employed a True Experimental design with a Completely Randomized Design (CRD), consisting of four groups: F0 (commercial instant rice) and formulations of edamame flour to seaweed flour ratios, namely F1 (40%:60%), F2 (50%:50%), and F3 (60%:40%). The results showed that calcium and iron contents among the treatment groups were significantly different (p 0.05). The best formulation was F3, consisting of 60% edamame flour and 40% seaweed flour, with magnesium content of 63 mg/kg, calcium 320 mg/kg, iron 38.49 mg/kg, and zinc 16.41 mg/kg. Comparative analysis between F0 and F3 showed a significant difference in all parameters. These results indicate that instant analog rice based on edamame and seaweed is a promising mineral‑rich food ingredient; further research on mineral bioavailability, sensory acceptance, and clinical outcomes is recommended
Product development of tortilla chips from white glutinous corn and cassava starch with addition of sodium bicarbonate
No full textTortilla chips, a popular corn-based snack originating from Mexico, are the focus of this research due to their potential for nutritional enhancement and improved sensory qualities. The study explores the use of white glutinous corn, tapioca, anchovy flour, and sodium bicarbonate to create a product with better texture, flavor, and nutritional value. The anchovy addition aimed to increase its flavor and calcium content. The experimental design of the research was Completely Randomized Design (CRD) Factorial Type with two factors, namely the proportion of white corn flour: tapioca (90:10, 80:20, 70:30) and the addition of sodium bicarbonate (0.2%, 0.4%, 0.6%). The data was analyzed by analysis of variance and further tested used Duncan?s Multiple Range Test. The best treatment is tortilla chips made from proportion of white corn flour: tapioca flour (70:30) with the addition of sodium bicarbonate (0.2%). These tortilla chip had the characteristics as follow: water content of 8.89%, ash content of 6.00%, protein content of 11.02%, fat content of 4.64%, starch content of 60.40%, amylose content of 12.25%, amylopectin content of 48.15%, total dietary fiber content 4.71%, calcium content 493.85 mg/100gr; and it was preffered by panelist in term of color, aroma, taste and textur
Formulation and characterization of ethanol–lemongrass oil emitters as antimicrobial active packaging
No full textThe application of appropriate postharvest technologies is essential to reduce deterioration and maintain the quality of fresh tropical fruits. Active packaging is an effective approach that enables the controlled release of antimicrobial agents to suppress fungal growth. This study developed an ethanol–lemongrass oil emitter (ELE) formulated with ethanol, silica dioxide, sodium stearate, and lemongrass (Cymbopogon citratus) essential oil at concentrations of 0 MIC, 0.5 × MIC, 1 × MIC, and 2 × MIC. Increasing essential oil concentration enhanced antifungal activity against Aspergillus niger, with the 2 × MIC formulation combined with an emitter mass of 2.5 g achieving complete fungal inhibition during storage. The antifungal effect was dose-dependent, as higher concentrations resulted in greater suppression of mycelial growth. Analysis of mass changes indicated that weight loss was mainly due to the volatilization of ethanol and essential oil components, rather than moisture absorption. The incorporation of silica dioxide and sodium stearate helped maintain the formulation's hydrophobic properties and ensure stable vapor release throughout storage. Overall, the ELE demonstrated strong antifungal efficacy and consistent controlled-release performance, highlighting its potential application for extending the shelf life of fresh tropical fruits
Kinetics Study of Time Temperature Indicator Label Based on Red Palm Oil and Soybean Oil Blends
No full textPasteurized milk is a perishable food. Time Temperature Indicator (TTI) labels can display temperature changes in real time based on variations in storage temperature over a predetermined period of time. The research discussed the time temperature indicator from a mixture of red palm oil (RPO) and soybean oil. The study aimed to determine the ability of the indicator to predict changes in the quality of pasteurized milk and determine the best oil mixture ratio variation that can be used in TTI indicators. The research was conducted with variations in the mixing of RPO and soybean oil, namely A (70%: 30%), B (60%: 40%), C (50%: 50%), D (40%: 60%), and E (30%: 70%) and storage temperatures of 8, 29, 44 and 51°C. Then, the length, rate, and diffusion coefficient and activation energy (Ea) were calculated. Calculation of total microbes in milk samples was done by storing milk at 8, 29, 40°C. Ea values that meet the standard range from 34-50 kJ/mol. The study showed that the selected indicators used were the highest Ea value indicator (E) 41.6889 kJ/mol. and the indicator with the highest percentage of MSM mixture (B) 37.2667 kJ/mol. The Ea value of the pasteurized milk sample is 44.021 kJ/mol, so the difference between the Ea of the product and the Ea of the indicator has met the standard. This means that both indicators are below the maximum Ea difference value limit that is said to be good (<25 kJ/mol)
The Lee–Wick–Chern–Simons pseudo-quantum electrodynamics
No full textThe Lee–Wick pseudo-quantum electrodynamics in the presence of a Chern–Simons term is studied in this paper. The paper starts with a non-local lagrangian density that sets the pseudo-Lee–Wick electrodynamics defined on a space-time added to a non-local Chern–Simons topological term. Thus, we obtain the Lee–Wick–Chern–Simons pseudo-electrodynamics as a most complete gauge invariant model that provides a light mass associated with the Chern–Simons parameter, and also includes a Lee–Wick heavy mass. We investigate classical aspects as the potential energy for the interaction of static charges through the gauge propagator. The causality of theory is discussed through the retarded Green function in the coordinate space. The gauge field of the Lee–Wick–Chern–Simons pseudo-electrodynamics is minimally coupled to the fermions sector that includes new degree of freedoms, as a Lee–Wick heavy fermion partner of the electron. The perturbative approach for the theory is presented via effective action in which we obtain the Ward identities. We study the quantum corrections at one loop, as the electron self-energy, the vacuum polarization, and the 3-vertex. We show that the Lee–Wick mass has a fundamental role in these results, where it works like a natural regulator of the ultraviolet divergences. The factor for the electron is obtained as function of the LW mass, and of the CS parameter. Through the optical theorem, the Lee–Wick–Chern–Simons pseudo-electrodynamics is unitary at the tree level
Probing nuclear geometry through multi-particle azimuthal correlations and rapidity-even dipolar flow in
No full textWe study symmetric and asymmetric cumulants as well as rapidity-even dipolar flow in O+O collisions at GeV to explore -clustering phenomena in light nuclei within the viscous relativistic hydrodynamics framework. Signatures of -clustering manifest in the anisotropic flow coefficients and their correlations – particularly in observables involving elliptic-triangular flow correlations. We show that final-state symmetric and asymmetric cumulants – especially and – are sensitive to the initial nuclear geometry. Additionally, we observe a significant difference in rapidity-even dipolar flow, , between -clustered and Woods–Saxon configurations in high-multiplicity events. These findings underscore the pivotal role of nuclear structure in heavy-ion collision dynamics and provide observables for distinguishing nuclear geometries, particularly in ultra-central collisions
Shadows and quasinormal modes of a Schwarzschild black hole immersed in Hernquist dark matter halo
No full textThis paper investigates the shadow and quasinormal modes (QNMs) of a Schwarzschild black hole (BH) embedded in a Hernquist dark matter (DM) halo, focusing on the influence of DM parameters – specifically the core radius and core density – on BH observational signatures. We analyze the structure of the BH shadow, lensing ring, and photon ring, showing that the shadow radius increases with both and . Using the WKB approximation, Padé approximants, and time-domain integration, we compute the QNMs for scalar, electromagnetic, and axial gravitational perturbations. Our results reveal that the DM halo modifies the spacetime’s effective potential: larger values of or reduce the peak of the potential barrier, leading to lower oscillation frequencies and slower wavefunction damping. These findings highlight the systematic impact of DM on strong-field observables and suggest that BH shadows and QNMs provide a viable means to probe DM profiles in galactic nuclei