bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on the Treatment Efficiency of Micro-Polluted River Water by Using Fluid Mechanics and Wave Propagation Characteristics
Authors: Liu Ying , Wang Siyang , Xu Shuo , Chen Lizhu , Li Xuejiao , Liu Hongxu 
Published: February 2025

Abstract
This study designed an innovative algorithm based on fluid mechanics and combined it with model simulation to systematically analyze the treatment effect of micro-polluted river water. By constructing a mathematical model of water flow motion, key fluid mechanics characteristics such as energy attenuation and wave velocity change during wave propagation are accurately captured. The removal efficiency of micro-pollutants under different fluid conditions is quantitatively analyzed, further revealing the role of wave propagation characteristics in promoting treatment efficiency. During the simulation process, the system was operated under a variety of boundary conditions and parameter settings to obtain the treatment effect under different working conditions. The results show that the algorithm effectively improves the removal rate of harmful substances in micro-polluted river water under the condition of fine control of fluid mechanics parameters, especially under high-frequency wave propagation conditions, the treatment efficiency is significantly improved, and the removal rate can reach more than 85%. This paper also provides accurate data analysis, including pressure changes, velocity distribution, and energy conversion efficiency during wave propagation, which verifies the reliability of the algorithm and the practical application potential of the model.
Quantum simulation for time-dependent Hamiltonians – with applications to non-autonomous ordinary and partial differential equations
Authors: Cao Yu , Jin Shi , Liu Nana 
Published: February 2025

Abstract
Non-autonomous dynamical systems appear in a very wide range of interesting applications, both in classical and quantum dynamics, where in the latter case, it corresponds to having a time-dependent Hamiltonian. Designing quantum algorithms for time-dependent Hamiltonian is generally much more complicated than time-independent Hamiltonian problems, due to the challenge in handling the time-ordering; moreover, almost all existing such algorithms are developed for qubit-based quantum devices.&#xD;Here we propose an alternative formalism based on Sambe-Howland's clock that turns any non-autonomous unitary dynamical system into an autonomous unitary system, i.e., quantum system with a time-independent Hamiltonian, in one higher dimension, while keeping time continuous. This makes the simulation with time-dependent Hamiltonians not much more difficult than that of time-independent Hamiltonians, and can also be framed in terms of an analogue quantum system evolving continuously in time. We show how our new quantum protocol for time-dependent Hamiltonians can be performed in a resource-efficient way and without measurements, and can be made possible on either continuous-variable, qubit or hybrid systems. Combined with a technique called Schrodingerisation, this dilation technique can be applied to the quantum simulation of any linear ODEs and PDEs, and nonlinear ODEs and certain nonlinear PDEs, with time-dependent coefficients.
Certifying measurement incompatibility in prepare-and-measure and Bell scenarios
Authors: Egelhaaf Sophie , Pauwels Jef , Quintino Marco Túlio , Uola Roope 
Published: February 2025

Abstract
We consider the problem of certifying measurement incompatibility in a prepare-and-measure (PM) scenario. We present different families of sets of qubit measurements which are incompatible, but cannot lead to any quantum over classical advantage in PM scenarios. Our examples are obtained via a general theorem which proves a set of qubit dichotomic measurements can have their incompatibility certified in a PM scenario if and only if their incompatibility can be certified in a bipartite Bell scenario where the parties share a maximally entangled state. Our framework naturally suggests a hierarchy of increasingly stronger notions of incompatibility, in which more power is given to the classical simulation by increasing its dimensionality. For qubits, we give an example of measurements whose incompatibility can be certified against trit simulations, which we show is the strongest possible notion for qubits in this framework.
Short-time large deviations of first-passage functionals for high-order stochastic processes
Authors: Tian Lulu , Chen Hanshuang , Li Guofeng 
Published: February 2025

Abstract
We consider high-order stochastic processes x(t) described by the Langevin equation

d
m

x

(
t
)

d

t

m

=

2
D

ξ
(
t
)

, where

ξ
(
t
)

is a delta-correlated Gaussian noise with zero mean, and D is the strength of noise. We focus on the short-time statistics of the first-passage functionals

A
=

∫

0

T

[
x
(
t
)
]

n

d
t

along the trajectories starting from

x
(
0
)
=
L

and terminating whenever passing through the origin for the first-time at t = T. Using the optimal fluctuation method, we analytically obtain the most likely realizations of the first-passage processes for a given constraint A with n = 0 and 1, corresponding to the first-passage time itself and the area swept by the first-passage trajectory, respectively. The tail of the distribution of A shows an essential singularity at A → 0,

P

m
,
n

(
A

|

L
)
∼
exp
⁡
(
−

α

m
,
n

L

2
m
n
−
n
+
2

D

A

2
m
−
1

)

, where the explicit expressions for the exponents

α

m
,
0

and

α

m
,
1

for arbitrary m are obtained.
Semi-classical limit of the Dirac equation in curved space and applications to strained and photonic graphene
Authors: Fillion-Gourdeau Francois , Lorin Emmanuel , MacLean Steve , Yang Xu 
Published: February 2025

Abstract
The semi-classical regime of static Dirac matter is derived from the Dirac equation in curved space-time. The leading- and next-to-leading-order contributions to the semi-classical approximation are evaluated. While the leading-order yields classical equations of motion with relativistic Lorentz and a geometric forces related to space curvature, the next-to-leading-order gives a transport-like equation with source terms. We apply the proposed strategy to the simulation of electron propagation on strained graphene surfaces, as well as to the dynamics of edge states in photonic graphene.
Effect of purple sweet potato paste (Ipomoea batatas L.) addition on yoghurt quality
Authors: Julianti Elisa , Nurminah Mimi , Nathania Beatrice 
Published: February 2025

Abstract
The Ayamurasaki variety of purple sweet potato is one of the sweet potato cultivars that are widely grown in Indonesia. Purple sweet potato is known to contain non digestible oligosaccharides (NDOs) that can act as prebiotics for the development of probiotic in yoghurt making. This study was aimed to evaluate the effect of adding purple sweet potato paste on the physical, chemical, sensory quality, and growth of lactic acid bacteria in yoghurt. The model used in this study was a non-factorial Completely Randomized Design (CRD) with single factor of purple sweet potato paste addition. Parameters observed were viscosity, pH, total titratable acid as lactic acid, anthocyanin content, total sugar, color index (°Hue), total lactic acid bacteria, antioxidant activity (% Inhibition), and organoleptic by hedonic value of color, aroma, taste, viscosity, and general acceptance. The results showed that the paste addition had a highly significant effect (P < 0,01) on the viscosity, pH, total acid, anthocyanin content, color (°Hue), total lactic acid bacteria, organoleptic by hedonic value of color, aroma, viscosity, and general acceptance of yoghurt.
Quality analysis of soap noodles from palm fatty acid distillate-refined bleached deodorized palm stearin blend
Authors: Yudiansyah Muhammad Ravi , Hasibuan Rosdanelli , Tambun Rondang 
Published: February 2025

Abstract
Soap noodles are a raw material for making soap and are produced through saponification of vegetable oil. Soap noodles have a cylindrical shape with white to-cream color and a melting point of 70-80 °C. The production of soap noodles can be done by mixing two types of ingredients called oil blends. An oil blend is a mixture of fats or oils in specific ratios. In this research, soap noodles were made by mixing PFAD and RBDPS to reduce the use of RBDPS, considering that the price of RBPDS is relatively high. The quality of obtained soap noodles was evaluated and compared to PT. X standard, as one of the soap noodles producers located in North Sumatera Province, Indonesia. The PFAD:RBDPS ratios were 50:50, 70:30, and 90:10, with a total mass of mixture was 1,000 g and Total Fatty Matter (TFM) was 60%. The results showed that the best soap noodles that met the PT. X standard was obtained with PFAD:RBDPS ratio of 70:30, with moisture content of 23.48%, free alkali content of 0.32%, salt content of 0.99%, alcohol-insoluble matter of 7.08%, glycerol content of 3.04%, and TFM of 60.05%.
The influence of applying local wisdom in sustainable differentiation strategy to achieve competitive advantage in the tourism industry
Authors: Pratiwi Ratih , Muhtar  , Arilaha Muhammad Asril , Arafat  , Loppies Yerrynaldo 
Published: February 2025

Abstract
The tourism industry is one of the largest economic sectors in the world. As global competition increases, tourist destinations continue to seek sustainable differentiation strategies to attract more tourists and maintain a competitive advantage. In Indonesia, the tourism sector contributed 5.0% of Gross Domestic Product (GDP) in 2019 with its extraordinary cultural richness and natural diversity, but even so, Indonesia still faces challenges in utilizing local wisdom effectively to increase the competitiveness of tourist destinations. This research aims to investigate the role of local wisdom in forming a sustainable differentiation strategy to achieve a competitive advantage in the tourism industry. The research method uses a quantitative approach with a population consisting of tourist destination managers, local stakeholders and tourists. Sample selection used stratified random sampling with a sample size of 384 respondents. Data was collected through a structured survey and analyzed using Structural Equation Modeling (SEM) to evaluate the relationship between local wisdom, differentiation strategy and competitive advantage. The results of the analysis show that there is a significant positive relationship between local wisdom and differentiation strategy, which shows that utilizing local cultural elements will increase unique tourism offers. In addition, an effective differentiation strategy contributes significantly to achieving competitive advantages such as increased visitor satisfaction, loyalty, positive destination image, reputation and recommendations. This proves that integrating local wisdom into a differentiation strategy can increase the competitiveness and sustainability of tourism, so tourism managers need to integrate cultural heritage into strategic planning to differentiate their destinations effectively.
Optimizing natural resource utilization: A case of physical and monetary balance of pine resin in forest farmer group
Authors: Makkarennu  , Ruli Sastra Jassen , Irnasari  
Published: February 2025

Abstract
Pine resin is one of the non-timber forest products that has significant economic value and can contribute to the income of the community. The community utilizes pine resin by relying on pine trees that grow naturally on their land. One of the obstacles to the utilization of pine is the lack of information regarding the initial and final reserves of these NTFPs. This study is located in several villages in Maros Regency, South Sulawesi, Indonesia, and aims to determine the physical balance and monetary balance of pine resin natural resources by community groups. The research was conducted using physical balance analysis, which was conducted by calculating the amount of initial reserves, additions, and depletion of resources in kilograms, and monetary balance, calculated by converting physical reserves into rupiah currency value. The study results showed that the final reserve value in the physical balance sheet amounted to 70.189 kg, and the final reserve value in the monetary balance sheet reached IDR 2.185.769.200. The utilization of this pine resin resource shows the potential for significant depreciation if there is no addition to pine trees. Therefore, efforts are needed to maintain the sustainability of these resources through effective planning and management.
Regenerative agriculture based Good Agricultural Practices (GAP) for soil health in arabica coffee in North Sumatra
Authors: Nora Silvia , Kuswardani Retna Astuti , Mawardi Surip , Novita Aisar 
Published: February 2025

Abstract
This study was learn for influence application agriculture regenerative based Good Agriculture Practices (GAP) on the soil health of Arabica coffee plants. The research location is in the highlands of the Lake Toba area, namely Karo Regency, Simalungun Regency, Dairi Regency and North Tapanuli Regency. The Arabica coffee plants selected are productive or mature plants that are managed by implementing regenerative agriculture in coffee cultivation according to GAP and not according to GAP. Data analysis uses cluster analysis, namely grouping objects with the same characteristics and PCA-biplot analysis. The study’s findings indicate that applying GAP-based regenerative agriculture to soil improves its nutritional content in terms of both total N and organic C, as well as the soil’s C/N ratio. Where the C/N ratio is 10.55 – 14.01. In general, the application of cultivation with GAP has been proven to increase soil fertility and soil health, thereby supporting vegetative growth, and has the potential to increase coffee plant production.
Plant therapy to improve mental health of older people in Nangbelawan Village, Karo Regency, Indonesia
Authors: Barus Floren Br , Thamrin Husni , Putri Malida , Ritonga Fajar Utama , Suriadi Agus , Lubis Mia Aulina , Saragih Izzah Dienillah 
Published: February 2025

Abstract
This research examined the effect of plant therapy on the mental health of older people and to understand how gardening activities can improve their mental well-being in Nangbelawan Village, Karo Regency, Indonesia. The research method used was descriptive qualitative, involving in-depth interviews with the older people, village government, and direct observation of gardening activities. The results showed that gardening therapy helped the older people feel more active, energetic and satisfied with their crops. The activities reduced stress, depression andanxiety, and improvedsleep and social interaction. Respondents who engage in gardening therapy feel more connected to society and the environment. In conclusion, gardening therapy has significant benefits in improving the mental health of older people and can be an effective approach in supporting their well-being in Nangbelawan Village. Support from the village government and active participation of older people are also important factors in the success of this program.
Mitigating food waste and household waste management: The potential for redistributing surplus food in the policy communication of Medan City government
Authors: Khairifa Feni , Kholil Syukur , Syam Abdi Mubarak , Al-Mujahid Naqil Sayyaf 
Published: February 2025

Abstract
This article aims to examine strategies for mitigating food waste and managing household waste in Medan City through the potential redistribution of surplus food within the context of public policy communication. The study adopts a qualitative approach using a case study method, focusing on understanding the phenomenon of surplus food redistribution from the perspective of various stakeholders, including local government, NGOs, food businesses, and local communities. Primary data sources were collected through in-depth interviews and participatory observations, while secondary data were obtained from official documents and activity reports. The research findings indicate that waste reduction policies implemented through Medan Mayor Regulation No. 26 of 2019 have successfully increased public awareness and participation in waste management. This policy includes education and public campaigns, training, and cooperation with local institutions and businesses, as well as incentive programs that encourage active community involvement. Coordination and collaboration between government sectors and the private sector also strengthen the implementation of this policy, ensuring well-coordinated waste management efforts. Surplus food redistribution in Medan has shown effectiveness in reducing food waste and supporting local food security. Initiatives such as the Surplus application and the Food Cycle Indonesia program leverage technology and community cooperation to distribute consumable food to needy groups. This approach not only reduces the volume of waste but also supports the Sustainable Development Goals (SDGs), including Zero Hunger, Responsible Consumption and Production, and Climate Action. A clear and effective policy communication strategy, supported by cross-sector collaboration, can significantly contribute to reducing food waste and sustainably managing household waste in Medan City. This research provides valuable insights for developing similar policies in other regions.
Growth of trembesi (Samanea saman) seedlings on waste growing media which modified with organic matter
Authors: Ahmad Alfan Gunawan , Sagala William A , Harahap Moehar M 
Published: February 2025

Abstract
Currently, heaps of waste are still found in the former waste dump area in Namo Bintang Village, Pancubatu District, Deli Serdang Regency, North Sumatra Province. If left untreated, this pile of waste will cause environmental pollution for residents living around the Namo Bintang landfill. Utilizing waste as a plant growing medium through modifying the addition of organic matters is one way to mitigate the negative impacts of the waste pile. This research aims to analyze the growth of Trembesi (Samanea saman) seedlings planted in waste growing media that has been modified with organic matter. The experimental design chosen to test seedling growth used a Completely Randomized Design with 5 treatments, namely T0= Growing media with a composition of 100% waste (control), T1= Growing media with a composition of 80% waste + 20% top soil, T2= Growing media with a composition of 70% waste + 30% top soil, T3= Growing media with a composition of 80% waste + 20% charcoal, and T4 = Growing media with a composition of 70% waste + 30% charcoal. Each treatment was repeated 5 times. Growth parameters observed included seedling height (cm), stem diameter (mm), number of leaves (pieces), biomass (gram) and root-shoot ratio. Observations of growth parameters were carried out every 2 weeks for 3 months. The results of this research indicate that the addition of top soil to the waste media has a better effect on the growth of trembesi (Samanea saman) seedlings than the addition of charcoal. The composition of the growing media that provides the best growth response for Trembesi (Samanea saman) seedlings is waste media + 30% top soil or T2 treatment.
Multistage pectin extraction from lemon (Citrus limon) peel: Effect of nitric acid solvent pH and number of stages
Authors: Michael  , Masytha  , Iriany  , Taslim  
Published: February 2025

Abstract
Substantial lemon (Citrus limon) production in Indonesia generates an abundant amount of lemon peel waste. Lemon peels, comprising 25–44% of the total fruit mass, are typically discarded as a byproduct subsequent to pulp consumption. The valorization of lemon peel pectin content could mitigate waste accumulation. The present study investigated the best nitric acid solvent pH and the number of extraction stages for lemon peel pectin and analyzed the characteristics of pectin obtained from multistage extraction. Pectin was extracted via reflux methods at varying pH (0.5, 1.0, and 1.5) and employing sequential extraction stages ranging from one to three. The reflux extraction at pH 1.0 yielded the best pectin yield of 29.24±0.15% for the two-stage extraction. Statistical analysis using a t-test revealed no significant difference (p>0.05) between the pectin yields obtained from the two-stage and three-stage extractions. The extracted lemon peel pectin exhibited a low methoxyl content and classified as a low ester pectin. The equivalent weight of the extracted pectin spanned from 477.27±32.14 mg to 1000 mg, while the galacturonic acid content ranged from 29.92±2.49% to 70.40%. Notably, the pectin obtained through the two-stage reflux extraction at pH 1.0 exhibited specifications conforming to the International Pectin Producers Association (IPPA) standards. The conditions described demonstrate best performance characteristically. Fourier-transform infrared (FTIR) spectroscopic analysis confirmed the similarity of functional groups (O-H, C-H, and C=O) and molecular key structures (C-C and R-O-R bonds) between the best extracted pectin and the commercial pectin. The extraction method can serve as a reference for industrial food applications and address the existing methodological gap regarding multistage pectin extraction.
Integrating natural resources and technological innovation for sustainable growth
Authors: Sembiring Nurhayati , Tarigan Dandi Al-Fiqri , Ingrid Emmanuela S , Sitohang Diana Carolina , Humam Fasha Azman Muhammad Ghaisan 
Published: February 2025

Abstract
The integration of natural resources and technological innovation is essential for achieving sustainable growth in the face of increasing resource scarcity and environmental degradation. This study explores the multifaceted approach of combining advanced technologies with sustainable resource management practices to address these challenges. By leveraging digital technologies such as artificial intelligence (AI), big data analytics, and automation, industries can enhance the efficiency and effectiveness of resource use, leading to significant economic and environmental benefits. This research highlights the importance of collaborative innovation involving multiple stakeholders, including governments, businesses, and civil society, to co-create solutions that address complex sustainability issues. Case studies across various sectors, including mining, tourism, and agriculture, demonstrate the practical applications and benefits of integrating technological innovations with natural resource management. The study also identifies key challenges, such as technological barriers, regulatory constraints, and economic factors, and provides recommendations for overcoming these obstacles. The findings underscore the potential of green technologies to drive economic growth and create new market opportunities while promoting environmental sustainability. This research contributes to the ongoing discourse on sustainable development by offering practical insights and strategies for achieving long-term sustainability goals through the integration of natural resources and technological innovation.