bluuebunny/crossref_metadata_2025_split huggingface dataset:
Demand response in the German district heating system
Authors: Ju Yuchen , Lindholm Joakim , Verbeck Moritz , Jokisalo Juha , Kosonen Risto , Janßenc Philipp , Li Yantong , Schäfers Hans , Nord Natasa 
Published: May 2023

Abstract
The renewable energy share in energy supply systems is increasing for carbon neutrality. The realization of carbon neutrality can be supported by demand response (DR) strategies. This paper analyzed the DR control benefits of a German district heating (DH) system. For the first step, in German conditions, three building types were simulated by IDA-ICE software with and without a rule-based DR control. Secondly, a community was established based on the heat demand of the simulated buildings. This paper selected two different production scenarios. One scenario consisted by a biofuel CHP and gas boilers and the other one included a heat pump, an electric heater, and a solar thermal storage. After that, the production of the two scenarios with and without DR was optimized by the HGSO tool and it calculated the total production costs and CO2 emissions. It indicates that building owners and DH producers all earn benefits from the application of demand response. The maximum heating cost saving by DR is 4.9% for building owners. In the optimized two production scenarios, DH producers gain higher financial benefits and there are less CO2 emissions. The maximum total generation cost and CO2 emission savings are 12.6% and 8.6%, respectively.
Dam safety analysis using mathematical modelling and surveys, applied on Buftea Dam
Authors: Alexandru Ilie , Catalin Popescu , Altan Abdulamit 
Published: May 2023

Abstract
Today, statistics show that most of the accidents leading to dam failures occur in the case of embankment dams and, therefore, the authors have chosen to analyse the state of safety in operation of the Buftea Dam in Romania. The need for such analysis is sustained by the fact that the dam has an important role in flood protection on the Colentina River, which flows through a number of localities in the vicinity of the capital city of Romania, Bucharest (Buftea and Mogosoaia among the most important ones).
The paper presents a common advanced mathematical modelling with GeoStudio GeoSlope and Seep/W used to determine the level of water infiltration through the dam body, stability of dam and risk of failure when the dam is operated at different reservoir elevations, such as the normal retention level, the maximum retention level, rapid drawdown scenario and pseudo-static seismic analysis.
These types of analyses are used to determine the safety coefficients and safety status of dams, as part of the current monitoring and early detection of possible processes affecting the structures.
Hydrodynamic and sediment transport modelling for channel bed stabilization
Authors: Stancu Mihai 
Published: May 2023

Abstract
Sediment transport plays an important role in the overall process of navigation along the rivers, as it shapes the fairway continuously. This paper aims to present the partial results obtained in the PhD research regarding measures to be used in order to help stabilize the channel bed. The measures have been proposed and tested based on a calibrated and validated 2-dimensional hydrodynamic and sediment transport model. The results show the influence of the proposed measures along the river channel in comparison to the situation where no measures would be taken at all. Furthermore it can help understand the river and sediment dynamics in order to make the best decision upon the location, orientation, geometry and other properties of the proposed measures.
A Study on the Characteristics of the Atmospheric Boundary Layer Using SODAR Measurements
Authors: Țiţineanu Iris , Bandoc Georgeta , Degeratu Mircea 
Published: May 2023

Abstract
This paper analyzes the characteristics of the atmospheric boundary layer based on data from vertical sounding of the atmosphere using SODAR data. The variation of the mean wind speed and wind shear velocity in the atmospheric boundary layer were analyzed using data collected during nowcasting warnings of convective storms, but also 12 hours before and after the warnings, from 2018 to 2021. Thus, the structure and evolution of the atmospheric boundary layer following thunderstorms were observed. The resulting data are important in understanding the processes that take place in the atmospheric boundary layer during extreme weather events.
Physical modelling of cylindrical shafts: a brief review
Authors: Stan Elena-Mihaela , Popa Horațiu 
Published: May 2023

Abstract
This paper presents a series of physical tests used to model cylindrical shafts in order to study the earth pressure distribution and the induced vertical and horizontal displacements of the adjacent soil. Various methods used to model cylindrical shafts are described: one or more semi-circular aluminium tubes, curved steel segments cut longitudinally or a latex bag filled with a heavy fluid. The results showed that the lateral earth pressure distribution is well correlated with the results based on Terzaghi’s and Berezantzev’s theories. Also, the lateral earth pressure decreases until the active wall displacement is occurred. Based on the physical tests, researchers developed a series of equations that can be used to calculate the vertical and horizontal displacements of the soil.
Numerical assessment of the condensation phenomenon on a vehicle’s windshield
Authors: Ene Alexandra , Teodosiu Catalin , Bode Florin , Georgescu Matei 
Published: May 2023

Abstract
The energy consumption in buildings, transportation, services or processes has been raising constantly in the last years becoming top priority in research fields. As its impact on the environment has become more and more obvious, the transportation sector has been searching for solutions to lower its influence on future generations. Electric vehicles, proposed as an alternative to the internal combustion engine vehicles, still face some difficulties in driving range, cost, and for colder climates, passenger comfort conditions. As the HVAC system represents the highest energy consumption from the auxiliary systems in electric vehicles, this paper proposes to analyse to condensation phenomenon inside the vehicle’s cabin, especially on the windshield. The numerical approach assesses several scenarios of air velocities, temperatures, and thermal power inputs in order to establish the best configuration at the lowest energy cost.
Methodology for energy savings estimation, resulting from the development of a procedure for air pressure check in vehicle tires
Authors: Terziev A , Iliev I , Zlateva P , Ivanov M 
Published: May 2023

Abstract
The presented paper examines the possibilities of implementation of a methodology for evaluation of the energy savings, as a result of developed procedure for checking the air pressure in vehicle tires. The purpose of the developed methodology is to provide an opportunity to estimate energy consumption after checking the air pressure in the vehicle’s tires. The methodology is based on numerous experimental studies and analytical evaluation of fuel consumption as a function of tire pressure in vehicles. The conditions, the practical procedures and the sequence in the assessment of energy savings, after the introduction of the methodology for checking the air pressure in the tires of road vehicles, are defined. The methodology applies to road vehicles with a maximum mass of up to and over 3.5 tons with a nominal air pressure in the tires according to the manufacturer’s specifications. The data is summarized, based on the type of transport, number of vehicles, purpose of use - personal and business vehicles, tire pressure check, established average fuel consumption (gasoline, diesel and LPG) and average mileage of the study. Finally, a computational example is presented, proving that the methodology gives correct results for the evaluation of energy savings, after checking the air pressure in the tires of the vehicle.
Plants biodiversity utilisation in Bardarash, Kurdistan Region, Iraq
Authors: Abdulrahman M. D. 
Published: May 2023

Abstract
Plants have been used as medicine by humans from the beginning of recorded history. WHO reports that between 65% and 80% of the population in developing nations uses only natural remedies. It should be noted that the research area was selected due to the rich traditional knowledge of its people and the wide range of flora and fauna found there. The goal of these studies is to strengthen local knowledge by compiling a list of valuable plants for traditional medicine. Expert sampling method was utilised in the study with aid of an in-depth interview guide. Fourty two informants were interviewed from the period of September 2021-June 2022. Dominance of men were observed in the study 73.8 %. Age range of 56-65 dominated the study with 38.1%. The current study uncovered 42 plants from 24: Laminaceae (19.2%), Composite (12.8%), Brassica (6.4%), and Leguminosae (6.4%) and the remaining families each (2.1 %). Leaves and fruits are the most frequent used part of the plant at 24.5 % respectively. For the first time, the ethno botanical application of plant species from Bardarash was documented. Illegal collection, trading, and marketing have jeopardized the quantity and distribution of some high-value medicinal plants. The significance of preserving floral diversity is essential.
Agro living Labs: Creating innovative, sustainable, resilient and social inclusive food systems
Authors: Trivellas P , Mavrommati S , Anastasopoulou A , Grapas C , Kallikantzarou E 
Published: May 2023

Abstract
In response to climate, biodiversity, environmental, economic and social challenges to rural and peri-urban areas, an emergent type of living labs (LLs) has been developed: the ‘Agro Living Labs (ALLs)’. Various EU initiatives (e.g. the European Green Deal, the New European Bauhaus, the Farm to Fork strategy, the Biodiversity strategy) as well as the UN 2030 Agenda, highlight the need to direct towards agroecology. ALLs is a relatively new but very promising approach in agroecology practices. However, more practice-oriented research is needed to better understand how ALLs can help to effectively implement open and user-oriented innovations, to stimulate collaboration between different stakeholders in the community, to trigger cross-sectoral alliances and to build inclusive societies. This study aims to initiate a discussion around key elements of the ‘living lab way of working’ in agroecological food systems. Several scholars converge that we need to shed light upon particular approaches, methods, techniques, and tools that are used in real-life contexts to understand the opportunities offered by ALLs to peri-urban and rural areas. The authors suggest that ALLs, as Co-creating, Agroecological, Socio-Technical (CAST) systems, can help to address food systems crises, and to promote sustainability, integrity, equity, inclusiveness, resilience, circularity and productivity.
Experimental and numerical study of the airflow in bifurcations
Authors: Ramsamy Cella – Miruna , Mateescu Ciprian , Cristea Doru-Daniel , Tanasei Nicoleta – Octavia 
Published: May 2023

Abstract
The paper is dedicated to the experimental studies and numerical modeling of the airflow in a 3D cylindrical bifurcation. The computations are performed with the standard k – ε turbulence model implemented in the ANSYS Fluid Flow (Fluent) code of Workbench 2021R1. The direct visualizations and the numerical results are corroborated, with the aim to investigate the evolution of the vortical structures and the distribution of the flow rate in the bifurcation.
Effect of thermal manikin shape on thermal comfort parameters prediction uncertainties: a numerical study
Authors: Zasimova M A , Stepasheva E D , Ivanov N G 
Published: May 2023

Abstract
The main goal of the study is to evaluate the effect of the thermal manikin shape on the uncertainty of thermal comfort parameters CFD prediction. Numerical simulation of the airflow and heat transfer was carried out in a model room with displacement ventilation where a standing heated thermal manikin is located (test by P.V. Nielsen et al.). Numerical modelling was carried out using three manikin shapes: the detailed one (close to the human body shape), the simplified (block) one, and the single-parallelepiped shape. The 3D calculations were carried out using the ANSYS Fluent CFD package. Turbulence modelling was performed using the Reynolds-Averaged Navier-Stokes (RANS) approach with the standard k-ε turbulence model. The uncertainties in the CFD-predicted draught rating (DR), percentage dissatisfied caused by vertical air temperature difference (PD), the predicted mean vote (PMV) and the predicted percentage dissatisfied (PPD), are discussed. The main result of the paper is the quantitative evaluation of the changes in the local velocity, temperature and thermal comfort parameters due to the thermal manikin shape simplification. It was found that the shape simplifications are suitable if the goal of the study is to predict the integral parameters.
Numerical and experimental studies to increase the HVAC fan performance for electrical vehicles – Part 1
Authors: Joldoș Titus , Bode Florin , Opruța Dan 
Published: May 2023

Abstract
Electrified vehicles are more and more present in our days due to current worldwide regulations regarding reducing the greenhouse gases emissions. The transition from internal combustion engine vehicles to electrified vehicles has been quite abrupt, in the sense that some components have been changed such as the engine, but others have remained with an outdated design such as those components considered not to affect the new ones. One example in this matter is the HVAC (Heating, Ventilation and Air Conditioning) fan which performance can be improved given the fact that in the electrified vehicle case, the increase of the efficiency for any given component of the vehicle will translate eventually in the increase of the vehicle range. In this study we considered a real HVAC fan, which was 3D scanned, and a numerical simulated study was performed in order to evaluate the energy performances for a given real scenario. Also, the fan was tested experimentally in an industrial HVAC testing facility. The outcome of the study is the analysis of the standard electrified vehicle impeller, and the results were needed for the second part of the study in order to account the differences between these and the new proposed impellers.
Numerical and experimental studies to increase the HVAC fan performance for electrical vehicles – Part 2
Authors: Joldoș Titus , Bode Florin , Opruța Dan 
Published: May 2023

Abstract
A more efficient impeller was developed to replace the HVAC fan from an electrified vehicle in order to lower his energy consumption. This will lead ultimately to an increase of the electrified vehicle range. Three different impellers were designed having the following modifications than the original HVAC fan: a different angle of attack for the blades, changed blade radius, modified blade length, different positioning of the blades, different number of blades. First study consisted in the testing of all three HVAC impellers using the numerical simulation method. In the second part of this study, the most promising new impeller, given the numerical results, was 3D printed and installed in a new casing, specially built for this study. Then the performance of the impeller it was experimentally tested, and the results were compared with the original fan experimental result from a previous study. The main conclusion is that the old impeller is around 240% less efficient than the new impeller and only by changing one simple component in the electrified vehicle design (HVAC fan in this case), the range of the car can grow with approximately 3.84km for each fully charged battery.
Contribution to the modelling of air flows in a conical inlet drying chamber
Authors: Mamoudou Abdoulaye , Fokone Abraham Tetang , Berville Charles , Kuitche Alexis 
Published: May 2023

Abstract
The main objective of this study is to provide input on the mesh and temperature distribution inside the drying chamber for a building-integrated dryer for food preservation to obtain a uniform temperature profile. For this, we varied the angle of inclination of 20° and 30° subsequently we also varied the speed of the air flow of (1m/s; 1,2 m/s; 1,5 m/s; 1,7 m/s and 2 m/s), the temperature at the level of the walls is the ambient temperature it is 25°C and the air inlet temperature is set at 55°C. The results obtained showed that the temperature distribution inside the different drying chambers is almost uniform for an inclination of 30° against for an inclination of 20° it is uniform on the bend of the cone of the diffuser but not in the drying chamber. This uniform distribution reduces the drying time of the product. It can therefore be concluded that the variation in tilt angle and drying speed has a significant effect on the drying time of the product.
Flexible fibrous structure of bacterial cellulose by synergic role carboxymethyl cellulose and glycerol for LiB polymer electrolyte
Authors: Sabrina Qolby , Ratri Christin Rina , Hardiansyah Andri , Lestariningsih Titik , Subhan Achmad , Suliyanti Maria Margaretha , Yudasari Nurfina , Yudianti Rike , Uyama Hiroshi 
Published: May 2023

Abstract
In this work, we report a flexible nanofibrous cellulose nanocomposite with great potential for lithium-ion battery (LiB) polymer electrolyte. Flexible and fibrous material is synthesized using a simple and easy technique by synergistically combining carboxymethyl cellulose (CMC) and glycerol (Gly). Flexible porous cellulose forms a three-dimensional network for the mobility of Li ions in the polymer electrolyte of LIB systems. We investigated the effect ionic liquid of flexible fibrous cellulose (BC-CMC-Gly) on the electrochemical properties. The surface interaction between Li ions and the porous network is a key parameter demonstrated by the Li-ion emission line at 610.37 nm using laser inductance breakdown spectroscopy (LiBS). The ionic conductivity of BC-CMC-Gly characterized by EIS measurement is about 1.1 × 10−3 S cm−1. According to linear sweep voltammetry (LSV), BC-CMC-Gly, with a potential window of 4.3 V, shows a more expansive window voltage than pure BC (2.75 V) and BC-CMC (3.3 V). This indicates that the electrochemical stability is good, as wide as the range of voltages that the electrode reactions define. The specific capacity of BC-CMC-Gly containing IL is very high, about 27.6 mAh g−1 compared to BC (7.4 mAh g−1) and BC-CMC (11,5 mAh g−1). All these findings clearly show that forming plasticized structures synergistically with CMC trapped in the BC structure results in the largest Li-ion adsorption capacity and electrochemical performance improvement. Thermal stability up to 200 °C and electrolyte uptake of approx. 189% are the beneficial properties of BC-CMC-Gly fibrous cellulose for LiB electrolyte polymer.
Multiple-scattering frequency-time hybrid solver for the wave equation in interior domains
Authors: Bruno Oscar , Yin Tao 
Published: May 2023

This paper proposes a frequency-time hybrid solver for the time-dependent wave equation in two-dimensional interior spatial domains. The approach relies on four main elements, namely, (1) A multiple scattering strategy that decomposes a given interior time-domain problem into a sequence of limited-duration time-domain problems of scattering by overlapping open arcs, each one of which is reduced (by means of the Fourier transform) to a sequence of Helmholtz frequency-domain problems; (2) Boundary integral equations on overlapping boundary patches for the solution of the frequency-domain problems in point (1); (3) A smooth “Time-windowing and recentering” methodology that enables both treatment of incident signals of long duration and long time simulation; and, (4) A Fourier transform algorithm that delivers numerically dispersionless, spectrally-accurate time evolution for given incident fields. By recasting the interior time-domain problem in terms of a sequence of open-arc multiple scattering events, the proposed approach regularizes the full interior frequency domain problem—which, if obtained by either Fourier or Laplace transformation of the corresponding interior time-domain problem, must encapsulate infinitely many scattering events, giving rise to non-uniqueness and eigenfunctions in the Fourier case, and ill conditioning in the Laplace case. Numerical examples are included which demonstrate the accuracy and efficiency of the proposed methodology.
Targeting Hypertensive Response to Exercise and the Association of Masked Hypertension With Subclinical Organ Damage: A Mini-Review and Meta-Analysis
Authors: Cuspidi Cesare , Gherbesi Elisa , Faggiano Andrea , Sala Carla , Grassi Guido , Carugo Stefano , Tadic Marijana 
Published: May 2023

Abstract

BACKGROUND
Emerging evidence suggests that a hypertensive response to exercise (HRE) during dynamic or isometric stress tests assessing cardiac function is predictive of hypertension and cardiovascular events such coronary artery disease, heart failure and stroke. Whether HRE represents a marker of masked hypertension (MH) in individuals with no prior history of hypertension is still unclear. This is also the case for the association between MH and hypertension-mediated organ damage (HMOD) in the HRE setting.

METHODS
We addressed this issue through a review and a meta-analysis of studies providing data on this topic in normotensive individuals undergone both to dynamic or static exercise and to 24-h blood pressure monitoring (ABPM). A systematic search was performed using Pub-Med, OVID, EMBASE and Cochrane library databases from inception up to February 28th 2023.

RESULTS
Six studies including a total of 1,155 untreated clinically normotensive individuals were considered for the review. Data provided by the selected studies can be summarized as follows: (i) HRE is a BP phenotype linked to a high prevalence of MH (27.3% in the pooled population); (ii) MH is, in turn, associated with a greater, consistent likelihood of echocardiographic left ventricular hypertrophy (OR: 4.93, CI: 2.16–12.2, P &lt; 0.0001) and vascular organ damage, as assessed by pulse wave velocity, (SMD: 0.34 ± 0.11, CI: 0.12–0.56, P = 0002).

CONCLUSIONS
On the basis of this, albeit limited, evidence, the diagnostic work-up in individuals with HRE should primarily be addressed to look for MH as well as for markers of HMOD, a highly prevalent alteration in MH.