bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hydrogen isotope effects on recombination dominant plasmas in NAGDIS-II
Authors: Shi Jielin , Kaizawa Hideki , Uematsu Yuta , Tanaka Hirohiko , Kajita Shin , Ohno Noriyasu , Sawada Keiji , Ding Hongbin 
Published: June 2024

AbstractThe detachment processes of the hydrogen (H) and deuterium (D) plasmas are comparatively investigated in the linear plasma device NAGDIS-II. The laser Thomson scattering measurements demonstrate that the recombination rate of the H plasma is greater than that of the D plasma as the neutral pressure increases in the molecular activated recombination (MAR) dominant detachment phase. As the recombination process by MAR is strongly dependent on the vibrational and rotationally excited states of the molecule, the rovibrational quantum state populations of the H and D molecules are measured using the Fulcher-αband spectroscopy. The results indicate that the vibrational temperature in the electronic ground state is considerably higher than the rotational temperature during detachment. The reaction rate coefficients for MARs due to charge exchange chains (CX-MAR) and dissociative attachment chains (DA-MAR) are calculated by the collision-radiation model under the measured temperature conditions. It can be observed that the CX-MAR is larger than the DA-MAR for both H and D, and that the CX-MAR of H is larger than the CX-MAR of D at electron temperaturesTeabove 1 eV. In consideration of the experimentally observed vibrational and rotational excitation temperatures, the reaction rate coefficients of CX-MAR and DA-MAR are increasing in the lowTeregion. These calculations are in accordance with the experimental results, which indicate that recombination processes due to MAR are more predominant in the H plasma compared to the D plasma. Furthermore, a transition from MAR to electron–ion recombination processes is observed in the D plasma atTebelow 0.5 eV.
A novel dragonfly wing shape auxetic tubular structure with negative Poisson’s ratio
Authors: Augusto Gomes Rafael , Antonio de Oliveira Lucas , Brendon Francisco Matheus , Ferreira Gomes Guilherme 
Published: June 2024

Abstract
Mechanical structures abilities to absorb and dissipate energy have a variety of applications in daily life, including the ability to dampen mechanical vibrations and shock effects. In the present study, inspired by the dragonfly wing (DFW) shape, a novel auxetic unit cell was developed with the goal of proposing a novel structure with a lower stress concentrator and consequently increasing energy absorption. The negative Poisson’s ratio behavior was also studied. The DFW shaped unit cells were applied in a tubular structure, and the experimental samples were produced utilizing an additive manufacturing process with polylactic acid filament. To validate the ability to absorb energy of the novel unit cell, a comparison was proposed with the classical reentrant auxetic tubular structure following two different parameters: weight and the number of unit cells being developed in two different DFW structures. The study of the novel unit cell was performed using finite element analysis and experimental testing, and excellent agreement was observed between them. As a result, the bio-inspired DFWs shape in both configurations proposed when compared to the classical reentrant presented an excellent result in terms of absorbing energy, where the structure with the same quantity of unit cells and the structure with the same weight respectively absorb 163% and 79% when compared to the classical Reentrant, finally the new structure presented the negative Poisson’s ratio of −0.5, presenting an auxetic behavior and being able to resist more force and displacement
Thickness effect on superconducting properties of niobium films for radio-frequency cavity applications
Authors: Bianchi Antonio , Bonura Marco , Carlos Carlota P A , Leith Stewart , Rosaz Guillaume , Senatore Carmine , Venturini Delsolaro Walter 
Published: June 2024

Abstract
Niobium-coated copper radio-frequency cavities are cost-effective alternatives to bulk niobium cavities, given the lower material costs of copper substrates and their operation in liquid helium at around 4.2 K. However, these cavities historically exhibited a gradual degradation in performance with the accelerating field. This phenomenon, not yet fully understood, limits the application of niobium thin film cavities in accelerators where the real-estate gradient needs to be maximized. Recent studies on niobium films deposited on copper using high power impulse magnetron sputtering (HiPIMS) technique show promising results in mitigating the performance degradation of niobium thin film radio-frequency cavities.
This paper examines the effect of film thickness on the superconducting properties of niobium films deposited on copper using HiPIMS. The study provides insights into how the critical temperature, transition width, lower and upper critical fields, and critical current density vary with the film thickness. Increasing the thickness of niobium films deposited through HiPIMS is found to enhance superconducting properties and reduce densities of defects and structural irregularities in the crystalline lattice. This shows potential for enhancing overall performance and potentially mitigating the observed performance degradation in niobium thin film radio-frequency cavities. Additionally, the Ivry’s scaling relation among critical temperature, thickness, and sheet resistance at the normal state appears applicable to niobium films up to approximately 4 µm. This extends the previously confirmed validity for niobium films, which was limited to around 300 nm thickness.
Stability analysis of fractional relativistic polytropes
Authors: Aboueisha Mohamed S , Saad A S , Nouh Mohamed I , Kamel Tarek M , Beheary M M , Gadallah Kamel A K 
Published: June 2024

Abstract
In astrophysics, the gravitational stability of a self-gravitating polytropic fluid sphere is an intriguing subject, especially when trying to comprehend the genesis and development of celestial bodies like planets and stars. This stability is the sphere’s capacity to stay in balance in the face of disruptions. We utilize fractional calculus to explore self-gravitating, hydrostatic spheres governed by a polytropic equation of state

P
=
K

ρ

1
+
1
/
n

.

We focus on structures with polytropic indices ranging from 1 to 3 and consider relativistic and fractional parameters, denoted by σ and α, respectively. The stability of these relativistic polytropes is evaluated using the critical point method, which is associated with the energetic principles developed in 1964 by Tooper. This approach enables us to pinpoint the critical mass and radius at which polytropic spheres shift from stable to unstable states. The results highlight the critical relativistic parameter (

σ

C
R

) where the polytrope’s mass peaks, signaling the onset of radial instability. For polytropic indices of n = 1, 1.5, 2, and 3 with a fractional parameter

α
=
1
,

we observe stable relativistic polytropes for

σ

values below the critical thresholds of

σ

C
R

=

0.42, 0.20, 0.10, and 0.0, respectively. Conversely, instability emerges as

σ

surpasses these critical values. Our comprehensive calculations reveal that the critical relativistic value (

σ

C
R

) for the onset of instability tends to increase as the fractional parameter α decreases.
A higher-order generalization of an

A

4

(
1
)

-surface type q-Painlevé equation with

W

˜

(

(

A

2
N

⋊

A

1

)

(
1
)

×

A

1

(
1
)

)

symmetry
Authors: Nakazono Nobutaka 
Published: June 2024

Abstract
Recently, a birational representation of an extended affine Weyl group of

A

2
N

⋊

A

1

1

-type, which gives a higher-order generalization of an

A

4

1

-surface type q-Painlevé equation, was obtained. In this paper, we extend it to a birational representation of an extended affine Weyl group of

A

2
N

⋊

A

1

1

×

A

1

1

-type. Moreover, we provide conjectures on periodic reductions from systems of PΔEs with the CAC property to Painlevé type q-OΔEs.
New models of d-dimensional black holes without inner horizon and with an integrable singularity
Authors: Estrada Milko , Alencar G. , Crispim Tiago M. , Muniz C.R. 
Published: June 2024

Abstract
Theoretically, it has been proposed that objects traveling radially along regular black holes (RBHs) would not be destroyed because of finite tidal forces and the absence of a singularity. However, the matter source allows the creation of an inner horizon linked to an unstable de Sitter core due to mass inflation instability. This inner horizon also gives rise to the appearance of a remnant, inhibiting complete evaporation. We introduce here a d-dimensional black hole model with Localized Sources of Matter (LSM), characterized by the absence of an inner horizon and featuring a central integrable singularity instead of an unstable de Sitter core. In our model, any object tracing a radial and timelike world-line would not be crushed by the singularity. This is attributed to finite tidal forces, the extendability of radial geodesics, and the weak nature of the singularity. Our LSM model enables the potential complete evaporation down to r
h = 0 without forming a remnant. In higher dimensions, complete evaporation occurs through a phase transition, which could occur at Planck scales and be speculatively driven by the Generalized Uncertainty Principle (GUP). Unlike RBHs, our model satisfies the energy conditions. We demonstrate a linear correction to the conventional area law of entropy, distinct from the RBH's correction. Additionally, we investigate the stability of the solutions through the speed of sound.
Gravitational wave probes of Barrow cosmology with LISA standard sirens
Authors: Asghari Mahnaz , Allahyari Alireza , Mota David F. 
Published: June 2024

Abstract
We study the Barrow cosmological model, which proposes that quantum gravity effects create
a complex, fractal structure for the universe's apparent horizon. We leverage the
thermodynamics-gravity conjecture. By applying the Clausius relation to the apparent horizon of
the Friedmann-Lemaître-Robertson-Walker universe within this framework, we derive modified field
equations where the Barrow entropy is linked to the horizon. We assess the Barrow cosmology
against current observations — cosmic microwave background, supernovae, and baryon acoustic
oscillations data — and include projections for future Laser Interferometer Space Antenna (LISA)
standard sirens (SS). Our numerical results suggest a modest improvement in the Hubble tension for
Barrow cosmology with phantom dark energy behavior, compared to the standard cosmological
model. Furthermore, incorporating simulated LISA SS data alongside existing observational
constraints tightens the limitations on cosmological parameters, particularly the deformation
exponent.
Determination of liquid viscosity based on dual-frequency-band particle tracking
Authors: Yan 闫 Lihua 丽华 , Xue 薛 Boyin 博引 , Li 李 Yuanji 渊骥 , Feng 冯 Jinxia 晋霞 , Wu 武 Xingkang 兴康 , Zhang 张 Kuanshou 宽收 
Published: June 2024

Abstract
An optical-tweezers-based dual-frequency-band particle tracking system was designed and fabricated for liquid viscosity detection. On the basis of the liquid viscosity dependent model of the particle’s restricted Brownian motion with the Faxén correction taken into account, the liquid viscosity and optical trap stiffness were determined by fitting the theoretical prediction with the measured power spectral densities of the particle’s displacement and velocity that were derived from the dual-frequency-band particle tracking data. When the SiO2 beads were employed as probe particles in the measurements of different kinds of liquids, the measurement results exhibit a good agreement with the reported results, as well as a detection uncertainty better than 4.6%. This kind of noninvasive economical technique can be applied in diverse environments for both in situ and ex situ viscosity detection of liquids.
Frequency-modulated continuous-wave multiplexed gas sensing based on optical frequency comb calibration
Authors: Jia 贾 Linhua 琳华 , Qu 曲 Xinghua 兴华 , Zhang 张 Fumin 福民 
Published: June 2024

Abstract
Laser absorption spectroscopy has proven to be an effective approach for gas sensing, which plays an important role in the fields of military, industry, medicine and basic research. This paper presents a multiplexed gas sensing system based on optical frequency comb (OFC) calibrated frequency-modulated continuous-wave (FMCW) tuning nonlinearity. The system can be used for multi-parameter synchronous measurement of gas absorption spectrum and multiplexed optical path. Multi-channel parallel detection is realized by combining wavelength division multiplexing (WDM) and frequency division multiplexing (FDM) techniques. By introducing nonlinear optical crystals, broadband spectrum detection is simultaneously achieved over a bandwidth of hundreds of nanometers. An OFC with ultra-high frequency stability is used as the frequency calibration source, which guarantees the measurement accuracy. The test samples involve H13C14N, C2H2 and Rb vapor cells of varying densities and 5 parallel measurement experiments are designed. The results show that the measurement accuracies of spectral absorption line and the optical path are 150 MHz and 20 μm, respectively. The scheme offers the advantages of multiplexed, multi-parameter, wide spectrum and high resolution detection, which can realize the identification of multi-gas components and the high-precision inversion of absorption lines under different environments. The proposed sensor demonstrates great potential in the field of high-resolution absorption spectrum measurement for gas sensing applications.
The Effect of Temperature and Packaging on the Characteristics of Black Garlic During Storage
Authors: Sailah I , Nugroho NF , Tallei TE 
Published: June 2024

Abstract
The transformation of garlic into black garlic is a simple process that yields products beneficial to human health. The curing process, conducted at a temperature of 60-90°C for 14 days in a rice cooker, alters the garlic’s physicochemical properties. The aim of this research was to study changes in physicochemical properties during storage using various packaging types and to determine optimal storage conditions. Two different types of packaging (PET jar and Aluminium pouch were used, at different temperatures (10, 25, and 30°C). The experimental results revealed that both temperature and packaging significantly influenced moisture content. Over the course of 42 days, the average increase in water content ranged from 13% to 22% for all treatments. During storage, the biological phenomenon still occurred, and it caused changes in chemical properties. It suggests that a biological process converting sugars into acids was underway, although the changes were insignificant when using PET jar packaging at a temperature of 10°C. In conclusion, this study found that moisture content, hardness, levels of reducing sugars, and acidity total, all changed during seven weeks of storage, and the content of reducing sugars decreased, whilst acidity total increased. The best storage conditions were determined to be at 10°C using PET packaging.
Carbon Footprint in the Agri-Food Industry in Indonesia: An Analysis of Current Trends and Future Directions
Authors: Hendriadi Agung , Benyamin Boni , Jusuf Djafar M , Yohanes Heryoki , Badrul Jamal Irpan , Koeslulat Ermi E , Sumarno Lanjar , Budiyanto Agus , Purna Raharjo Yogi , Hadipernata Mulyana 
Published: June 2024

Abstract
The agri-food industry in Indonesia plays a crucial role in socio-economic development. It contributes 37% of the Gross Domestic Product (GDP) of the non-oil and gas processing industry sector. However, the agri-food industry contributes to greenhouse gas (GHG) emissions of about 10-12% of total anthropogenic greenhouse gases. It is predicted to increase, along with food consumption needs. These GHG emissions contribute to climate change and threaten the food industry’s sustainability. The purpose of this research is to examine existing trends and future direction of the carbon footprint in the agri-food industry and propose future recommendations for research and policy in reducing the carbon footprint of the agri-food industry in Indonesia. Combining a review of existing literature and an analysis journals related to the topics to find the research gaps, we found an increasing trend of carbon footprint from the agri-food industry in Indonesia between 2007 and 2023, in which food processing, packaging, transportation, and waste management are significant contributors to the agri-food supply chain. There are several recommendations to reduce the carbon footprint when research is essential, such as adopting more efficient product processing, packaging technologies, and improved waste management.
Green Synthesis of Silica Nanoparticles (Si-NPs) from Palm Oil Fuel Ash (POFA) and its Application to Purification Water: A Review
Authors: Wardanu AP , Indrasti NS , Suprihatin  
Published: June 2024

Abstract
Increasing the volume of palm oil production impacts the amount of waste the palm oil industry produces. This waste, if handled properly, will have a positive impact on the environment. Boiler efficiency and energy value can be increased while reducing solid waste and fossil fuel emissions by using shells and fibres as fuel. However, burning biomass as boiler fuel leaves residue as palm oil fuel ash (POFA) and is generally thrown away. POFA contains silica and can be extracted and synthesized into silica nanoparticles (Si-NPs) by process engineering. Si-NPs derived from agricultural waste or renewable sources are environmentally friendly and have unique properties such as high surface area, adjustable pore diameter, and excellent chemical and thermal stability. These properties make Si-NPs ideal for water purification, and this paper reviews recent advances in the synthesis of Si-NPs using POFA, future research directions, and challenges in the application of Si-NPs for water purification. This review compiles information from research articles on the current synthesis of environmentally friendly Si-NPs as study material to develop and utilize POFA waste as a biomaterial in fabricating filtration membranes in water purification.
Design of retort pouch packaging and shelf life estimation for commercial sterilized mutton tongseng by MSMEs
Authors: Sugiarto  , Muslich  , Widiaputri F F 
Published: June 2024

Abstract
Processed livestock products have a crucial role in the community as the secondary source of animal protein, followed by fishing goods. Goat meat is frequently cooked in many ways such as satay, soup, stew, tongseng, and other dishes. Nevertheless, the availability of pre-packaged goat meat products is limited due to the fact that they are mostly prepared on a made-to-order basis. HnR Food is a Micro, Small, and Medium Enterprise (MSME) that specializes in the production of commercially sterilized Ready to Eat (RTE) food products. Manufacturing RTE (Ready-to-Eat) products pose significant difficulties, particularly for MSMEs as it necessitates meticulous sterilization and packaging procedures to guarantee high quality and extended shelf life. The ASLT Arrhenius model was employed to conduct shelf life testing. The retort pouch bag packaging was compatible with the specified sterilization procedure and provided a cost-effective substitute for cans. The shelf life of mutton tongseng in the retort pouch bag was found to be 93 days or roughly 3 months at a temperature of 25°C. However, if stored at a temperature of 4°C, the shelf life could be extended to 170 days or approximately 6 months.
Effectiveness of Value-Added Input-Output Method in Upstream and Midstream Supply Chain Network of Sunflower Agro-industry
Authors: Nurhasanah Nunung , Natilla Adlina Ginang , Ibnah Mudrikah Isna , Chirzun Ahmad , Kumala Sriwana Iphov 
Published: June 2024

Abstract
Sunflower (Helianthus annuus L) is an annual shrub that grows up to three meters high. Sunflower agro-industry has high potential economic value. Sunflower seeds produce oil that can be extracted and used as a raw material in the food, pharmaceutical, bioenergy, and cosmetic industries. The problem is the low availability of superior local seeds, so it must be imported. The impact of imports is the low value-added. Therefore, this study aims to determine and measure the value-added of sunflowers in the upstream and midstream networks. The methods are Hayami and BPS input-output, also aims to identify the effectiveness of these two methods.. The results of value-added on sunflower seeds, cooking oil, herbal oil, and animal feed by the Hayami and the BPS input-output each are IDR6,000 (40%) and IDR24,005,528 (20%), IDR4,900 (26%) and IDR41,377,013 (23%), IDR21,000 (60%) and IDR117,653,333 (38%), IDR3,500 (86%) and IDR23,996,000 (100%). it is better to calculate using the BPS method because it is more detailed and clear in all aspects of the sunflower agroindustry, while using the hayami method only focuses on sales and labor. In the future, this research will be developed by designing sustainability improvement to reduce environmental impacts; performing value-added calculations for derivative products in the downstream supply chain network; also developing a decision support system.
Agro-Industrial Sustainability through Business Model: A Systematic Literature Review
Authors: Ermawati Tuti , Yoga Edi Ragil 
Published: June 2024

Abstract
The agro-industrial sector makes a significant contribution to economic growth. However, availability, quality, processing and marketing of agro-industrial products remain a challenge. Research on agro-industrial business models has been widely conducted, but those discussing through a systematic literature review (SLR) approach are still limited. This paper aims to analyze the current business models in the agro-industrial sector and evaluate their sustainability, specifically business models that are currently popular in the agro-industry sector and demonstrate the highest level of sustainability. This study applies SLR by reviewing 33 Scopus documents obtained through VOSviewer version 1.6.20. Bibliometric analysis was used to make thematic observations. The results demonstrates that there is a robust correlation between documents pertaining to agro-industry and business models indicated by 13 co-citation articles. In addition, co-occurrence analysis shows there has been four major business models in agro-industrial sectors, namely agro-industry as part of sustainable development; agro-industrial linked to the agriculture sector; digital-based business models; and the agro-industrial complex. Finally, this paper provides recommendations for further research into the business model of the agro-industrial complex.