bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tomography of stellar halos: what does anisotropy in a stellar halo tell us?
Authors: Pandey Biswajit 
Published: October 2022

Abstract
The stellar halo of the Milky Way is known to have a highly lumpy structure due to the
presence of tidal debris and streams accreted from the satellite galaxies. The abundance and
distribution of these substructures can provide a wealth of information on the assembly history of
the Milky Way. We use some information-theoretic measures to study the anisotropy in a set of
Milky Way-sized stellar halos from the Bullock & Johnston suite of simulations that uses a hybrid
approach coupling semi-analytic and N-body techniques. Our analysis shows that the whole-sky
anisotropy in each stellar halo increases with the distance from its centre and eventually
plateaus out beyond a certain radius. All the stellar halos have a very smooth structure within a
radius of ∼ 50 kpc and a highly anisotropic structure in the outskirts. At a given radius,
the anisotropies at a fixed polar or azimuthal angle have two distinct components: (i) an
approximately isotropic component and (ii) a component with large density fluctuations on small
spatial scales. We remove the contributions of the substructures and any non-spherical shape of
the halo by randomizing the polar and azimuthal coordinates of the stellar particles while keeping
their radial distances fixed. We observe that the fluctuating part of the anisotropy is completely
eliminated, and the approximately uniform component of the anisotropy is significantly reduced
after the sphericalization. A comparison between the original halos and their sphericalized
versions reveals that the approximately uniform part of the anisotropy originates from the
discreteness noise and the non-spherical shape of the halo whereas the substructures contribute to
the fluctuating part. We show that such distinction between the anisotropies has the potential to
constrain the shape of the stellar halo and its substructures.
Rotating cosmologies: classical and quantum
Authors: Nicolis Alberto , Piazza Federico , Zeghari Kenza 
Published: October 2022

Abstract
We revisit spatially flat, anisotropic cosmologies within the framework of mini-superspace. Putting special emphasis on the symmetries of the mini-superspace action and on the associated conservation laws, we unveil a new class of rotating cosmologies driven by solid matter. Their rotating is physical, in that it is characterized in an invariant way in terms of a conserved angular momentum. Along the way, we confirm the results of Bartolo et al. regarding the slow decay of anisotropies for solid inflation. We then use our minisuperspace approach as a laboratory to address certain puzzles of quantum cosmology — among these, how to characterize the spacetime symmetries of a quantum state at the level of the wavefunction of the universe. For the case of a solid driven cosmology, this question seems better defined than in more standard cases. Other questions remain unanswered, though; in particular, the general question of how to operate a minisuperspace-like truncation of degrees of freedom that is consistent at the quantum level.
Weak cosmic censorship conjecture in the pure Lovelock gravity
Authors: Shaymatov Sanjar , Dadhich Naresh 
Published: October 2022

Abstract
It is well known that a rotating black hole in four dimension could be overspun by linear order test particle accretion which however always gets overturned when non-linear perturbations are included. It turns out that in the Einstein gravity, repulsion due to rotation dominates over attraction due to mass in dimensions, D > 5, and consequently black hole cannot be overspun even for linear order accretion. For the pure Lovelock rotating black hole, this dimensional threshold is D > 4DN + 1 where N is degree of single Nth order term in the Lovelock polynomial in the action. Thus the pure Lovelock rotating black holes always obey the weak cosmic censorship conjecture (WCCC) in all dimensions greater than 4N + 1. Since overall gravity being repulsive beyond this dimensional threshold, how is rotating black hole then formed there?
Energetic valorization of municipal solid waste in Morocco: financial feasibility of refuse derived fuel production
Authors: Ouigmane A , Boudouch O , Hasib A , Ouhsine O , Abba E , Isaifan R J , Aadraoui M , Berkani M 
Published: October 2022

Abstract
The management of municipal solid waste is considered as a problem of municipalities in developing countries due to its impact on the environment and on human health. Energy recovery is considered as a sustainable waste management solution. The objective of this paper is to carry out a financial feasibility study of refused derived fuel (RDF) recovery in a region in Morocco. The results show that the cement plant requires 24,000 tons of RDF to substitute 15% of the pet coke used to produce 1 million tons of clinker per year. Thus, 14,000 tons of pet coke will be saved annually in this case. The results of comparing the net present values (NPV) of three investment scenarios show that the project is profitable if the investor is the cement plants or the group of municipalities with a selling price of 36 USD/ton of RDF. On the other hand, if the landfill company is the investor, the project becomes profitable from a sale price of 39USD/ton of RDF.
Impact of bad odors from the wastewater treatment plant on the well-being of the population of M’rirt (Morocco)
Authors: Hachi T , Hachi M , Essabiri H , Belghyti D , Abba E H 
Published: October 2022

Abstract
In the city of M’rirt, the odour nuisance caused by the wastewater treatment plant (WWTP) has led to numerous complaints from residents whose quality of life has been affected by these odours. Therefore, the objective of our study is to evaluate, in the field, the “real” impact of bad odours emanating from the WWTP with the help of a questionnaire during a period of 6 months. Our study sample composed of 1473 respondents chosen in a simple random way from the two municipalities surrounding the said odour source. The survey results revealed that among the 1473 respondents 71 (n=1040) confirmed “yes” the odour of the WWTP presents a real olfactory annoyance and 29% said “no” and that several factors are involved in its prediction. The statistical analysis of our study confirmed the negative impact of WWTP odours on the well-being of the city’s population, its spatial and temporal distribution with the establishment of a map of the olfactory discomfort in the city.
Ethnobotany and diversity of medicinal and food plants used in the region Chtouka Ait Baha and Tiznit (Western Anti-Atlas), Morocco
Authors: Barkaoui M , Msanda F , Boubaker H , Elasri O , Boullani R El , Benchelha H , Chahboune M 
Published: October 2022

AbstractWestern Anti-Atlas of Morocco represents an important area with interesting knowledge of medicinal and food plants, particularly the use of medicinal plants for human healthcare. Moreover, the geographic location of this region makes this site a remarkable area of incredible biodiversity and the highest levels of endemism. This work aims to make an inventory of plant species used in Chtouka Ait Baha and Tiznit provinces in folk medicine to manage different diseases and, at the same time, used in food. The survey was carried out using semi-structured questionnaires. A total of 450 interviews were conducted with traditional health practitioners and knowledgeable villagers. The data were analyzed using the use-value (UV) and the relative frequency citation (RFC). Eighty-four species belonging to 37 families were inventoried in this survey, with Lamiaceae as the dominating family. Two species that showed a significant value of UV (UV≥1.50) and RFC (RFC≥0.50) areThymus leptobotrysMurb. andThymus saturejoidesCoss. with the highest value obtained forThymus leptobotrysMurb. (UV=2.60). The digestive system was the highest foremost treated disease in the region (22% of treated infections). The obtained results also showed that seeds and leaves were the most cited plant part used, and the decoction is the preferred mode of preparation. The method of consumption the medicinal plants as food is fresh or dried with a percentage of 36%.
Seasonal diet of Salmo trutta macrostigma in a mountain stream (Ifrane Morocco)
Authors: Abba E H , Hachi T , El Moujtahid A , Essabiri H , Laiboud C , Boumalkha O , Zerkani S , Laadel N 
Published: October 2022

Abstract
The diet of salmo trutta macrostigma in Sidi Rachid wadi was conducted on 94 individual ranging in weight from 3 to 575 g with a mean of 110.38 g and a standard deviation of 112.94. Crustaceans mainly characterize the annual food spectrum and insects constitute more than 98%. The study of the variations of the diet spectrum shows that the nature and the importance in number of the ingested items of prey change according to the seasons, with an important relative predominance of crustaceans during all the seasons except winter when insects are the more important food source. In addition, the different taxa can be classified into two categories, a first group of preys always present in the stomach contents during all seasons and whose relative abundance is generally high, and a second group whose presence in the stomach contents was limited to one or two seasons. The most commonly used taxa are amphipoda, Ephemeroptera, and Diptera, with these three taxa forming at least 77% in summer and 90% in winter.
Mapping the natural habitats of a continental wetland: Dayet Er Roumi lake (Khémisset, Morocco)
Authors: Sadki M , Chahlaoui A , Maliki A , Khaffou M , Lahrouz S 
Published: October 2022

Abstract
The Dayet Er Roumi lake is located at 15 km from the city of Khémisset, is the only permanent natural continental lake of low altitude in Morocco, and is a zone of biological and ecological interest (SIBE) of priority n°1 and which must be raised to the rank of effectively protected areas (Natural Reserve). The mapping of natural habitats of the Dayet Er Roumi wetland was based on MedWet criteria. This classification proposes to identify the wetland in four hierarchical levels (system, sub-system, class and sub-class), based on three parameters of water characterization (hydrological regime, salinity and artificialization). This study showed that 68.80% of the mapped area of the wetland is occupied by surface water whose depth exceeds two meters; this habitat constitutes a favorable aquatic ecosystem for the colonization of aquatic birds. However, the lake is subject to several anthropogenic activities that hinder the development of natural habitats and their interaction with aquatic birds.
Assessment of the impact of density on the growth of fry (Oncorhynchus mikiss) at the salmon farming station in the Middle Atlas Morocco
Authors: Laiboud CH , Hachi T , Essabiri H , Boumalkha O , Elhammioui Y , El Moujtahid A , Abba E H 
Published: October 2022

Abstract
The objective of this study is to determine the impact of the load of the nursery ponds (density) on the growth of the rainbow trout fry (Oncorhynchus mikiss), this study was conducted at the fish farming station of Ras Al Ma Ifrane, Morocco. The results obtained for the densities D1 (7.48 Kg / m3), D2 (9.31 Kg / m3) and D3 (11.21 Kg / m3) during this nursery phase which lasted 30 days, the results indicate that the zootechnical parameters evaluated vary according to the density of the fry in different nursery ponds. In average, the final weight of the fry for D1 is 12.73g, for D2, the final average weight is 11.39g against only 9.56g for ponds with density D3. As such, the growth in size of the fry evolves in the same way as the growth in weight.
Impact of climate change on extremes events in Morocco
Authors: Hammoudy W , Ilmen R , Sinan M 
Published: October 2022

Abstract
Today, the increase in the evolution of certain types of extreme events in Morocco has the potential to produce impacts and damages on socio-economic sectors. An increase in heat and cold extremes manifested by strong heat waves and cold waves are clearly increased in terms of their intensity, frequency and duration. This required an in-depth study to understand the link between the two. So, this study under the following theme: “Impact of climate change on extremes events in Morocco” is devoted to studying the relationship between climate change and extreme events and the impact of one to the other, their occurrence and intensity; then it’s structured around one main phase, that aims to evaluate observed changes in climate extremes from 1984 to 2018 based on robust methods to estimate trends with Sen’s Slop test and their significance with Mann-Kendall test. The basic data obtained from 29 meteorological stations covering all climatic zones have passed quality control tests to ensure reliable detection of any changes. The results show that Morocco has experienced a significant increase in hot extremes and also in cold extremes almost generalized over our Country Morocco. As for rainfall extremes, the trends generally indicate no significant change.
Impacts of climate change on the dysfunction of Mediterranean wetlands: Case of Aguelmam Afennourir - Ramsar Site - the Middle Atlas – Morocco.
Authors: Khaffou Mhamed , Abba El Hassan , Chahlaoui Abdelkader 
Published: October 2022

Abstract
The water is a limiting factor for wetlands, especially for those with shallow deep. They are more vulnerable to precipitation disturbance. However, most of these wetlands are suffering from repetitive natural droughts. Example Aguelmam Afennourir wetland classified Ramsar site since 1980. After calculating the Normal Difference Water Index (NDWI), it has undergone severe and repeatedly drying and we have noticed four total dry-outs between 1981 and 2016. It is completely dried in July 1995, July 2000, June 2008, and in November 2016. While its largest extension, 100 % (122 ha) occurred in May 2009, the one before analyzing the historic precipitation for 1981 to 2016 and open water area evolution in the site we have brought that the drying of Aguelmam is closely linked to the irregularity of precipitation. Their drying up causes an ecological disequilibrium and has negative impacts on biodiversity since it has lost water which constitutes the defense of its habitats and biodiversity. Meanwhile, the fauna must leave the site and live the migration risks of searching the living habitat. The analysis of the hydrographic network of the sub-basin in the site reveals the possibility of diverting neighbouring streams toward the Afennourir wetland for heightening its water volume. As a preventive measure to protect the biodiversity of the site and to reduce the anthropogenic action, we propose strengthening the dyke with local materials, to increase the volume and the level of water in the wetland.
Android Real Time Earthquake & Tsunami Warning Alert System Based on Open Data of Indonesia Government Agency of Geophysics
Authors: Rais Aura Muhammad , Priyambodo Nur A N , Tricahyaningati Desi 
Published: October 2022

Abstract
There are approximately 4000 earthquakes happened in Indonesia per year, whereas earthquakes of a magnitude greater than 5.5, or earthquakes that can be physically felt on land, average around 70-100 per year, and destructive earthquakes around one to two times a year. Not all earthquakes cause tsunamis, but the majority of tsunamis are caused by earthquakes. Since the earth was formed, a number of tsunamis have been happening all over the world. The Aceh tsunami is one of the biggest tsunami history over past 2 decades which occurred on 26 December 2004, claimed the lives of around a quarter of a million people in areas surrounding the Indian Ocean. The very short tsunami arrival time of 10 – 60 minutes is a challenge for tsunami early warning. It also has a direct impact on evacuation procedures and means that evacuation times are very short as well. The objective of this study is to develop android real time earthquake & tsunami alarm as early warning system, evacuation directions and earthquake survivor detection for rescuer to reducing disaster risk. This study used the Research and Development method with the ADDIE (Analyze, Design, Development, Implementation and Evaluate) procedure. The result of this study the apps obtained less than 5 seconds respond time to proceed the earthquake & tsunami information from BMKG website to trigger early alarm in users android mobile phone. Android alert system more effective because it has a lower response time (< 5 seconds) than previous early warning system with a longer response time (13.48 seconds). In additions, developers improve the system not only distribute earthquake and tsunami information, but also provide evacuation route direction & survivor detection as a disaster risk reduction. Although in actual, this feature has the potential to be disrupted due to the large amount of user traffic. So it requires a large number of server resources if there are many active users.
Response to growth of mangrove seeds with additional extract of natural materials and vitamin b1 in the planting medium
Authors: Prihastanti E , Haryanti S 
Published: October 2022

AbstractThis study aims to determine the mangrove seedlings ofBruguierasp,Rhizopora apiculata, andR. mucronatawhich have the best quality with the addition of extracts of natural ingredients, synthetic pgr and Vitamin B1. The study used 3 types of mangroves, namely Bruguiera sp., R. apiculata and R. mucronata, each consisting of 5 treatments; 100% shallot extract, 100% corn extract, Rhizattun F 0.1%, Vitamin B1 0.1% and water (control). The research used completely randomized Design (CRD). Parameters observed were number of leaves, plant height, number of roots and root length. Measurement of environmental factors includes pH and salinity. Data were analysed using Analysis of Variance (ANOVA) and continued with Duncan’s 5% test, if there was a significant difference. The results showed that the treatment of extracts of natural ingredients, synthetic pgr and Vitamin B1 resulted in varying effects on the growth of mangrove seedling. Treatment on Bruguiera sp, had a significant effect on root length with the control treatment having the highest length; while inR. mucronata, Rhizatun F treatment had a significant effect on the number and length of roots, while inR. apiculatathe treatment given had no significant effect on the number of leaves.
The effect of stacking sequence on flexural behavior of laminated hybrid epoxi biocomposite reinforced with glass and carbon fibers used in the bone plate and external fixation
Authors: Bejinaru Mihoc Alexandru , Mitu Leonard Gabriel , RoŞca Ileana Constanţa 
Published: October 2022

Abstract
In the field of orthopedic medicine, hybrid biocomposites with epoxy matrix reinforced with carbon fibers and glass fibers are being used. Through the hybridization phenomenon, appropriate properties can be obtained for the use of these biocomposites in the bone plate and external fixation. The paper presents the manufacture of hybrid laminate with epoxy matrix reinforced with carbon fiber and glass fiber, three-point bending test method and the influence of the laminate layering sequence on the bending behavior of composite biomaterial.
Comparative study of Li-ion 18650 cylindrical cell under pinch indentation
Authors: Szabo I , Sirca A A , Scurtu L , Kocsis L , Hanches I N , Mariaşiu F 
Published: October 2022

Abstract
Conventional fuels for vehicles, which are non-renewable energy sources, are still currently in use. To reduce noise and CO2 emissions, electric vehicles dictate a remarkable research and developments in order to reach a viable solution. Electrified vehicles have a dedicated energy store, usually batteries, to improve emissions or replace the conventional energy source with electric power. For almost a decade now, the use of Li-ion batteries as a source of energy for electric vehicles has exploded, but there are also many questions about their safety. This study is dedicated to compare the results obtained by experiment with the result obtained by simulation about mechanical behavior of an 18650 Li-ion cell under pinch indentation.
Comparative study of Li-ion 21700 cylindrical cell under mechanical deformation
Authors: Szabo I , Sirca A A , Scurtu L , Kocsis L , Hanches I N , Mariaşiu F 
Published: October 2022

Abstract
Lithium-ion batteries (LIBs) are an important component of the automotive industry in terms of electrification. Regarding their safety, the researchers perform different scenarios in which they follow closely and carefully their behavior under the action of induced requests. The most common mechanical abuse tests are three-point bending, simple bending, deformation with hemispherical punch head and nail penetration. In this article, the behavior of the 21700 lithium-ion cell is debated and the results are compared. First, experimental tests are performed and the results are validated with FEM model, to check the veracity of the experiment. Also, the interpreted results can be used in future researches regarding safety of batteries.
Mathematical modelling and numerical analysis of hydraulic system behaviour. A case study with application in HEC-RAS
Authors: Dorin G. , Pricop C. , Stătescu F. , Hrăniciuc T.A. , Toma D. 
Published: October 2022

Abstract
The paper presents an analysis of floods within the Bahlueţ watershed. The city of Targu Frumos and its surroundings have suffered floods over the years causing significant damage. This study aims to map flooding in the area analysed, using the HEC-RAS hydraulic program. Results were obtained for 1%, 5%, 10%, 20% flood recurrence scenarios over a period of time with heavy rainfall. The results show that flooding occurred in all simulated events. The city of Targu Frumos was flooded when flood events with 1% and 5% probability were simulated. Based on the results obtained, predictions can be made regarding the extent of flooding in order to take additional measures for its prevention and control.
Optimization of aluminium die-casting process through predictive maintenance and parameter traceability systems
Authors: Mizgan H. , Ganea M. 
Published: October 2022

Abstract
The purpose of this paper is to present the optimisation potential for aluminium die casting process through predictive maintenance and parameter traceability systems. Aluminium considered the metal of the future due to its physical and chemical properties, and this paper is specifically focused on the die-casting process, its potential failures and proposed solutions for reduction of defects. The methodology for optimisation is based is focused on the Total Traceability Management (TTM) software and its technical solutions for predictive maintenance. As a key function of the TTM, the predictive maintenance module is based on conditioning monitoring systems. Temperature, colour, vibration, force, chemical, ultrasound, light, laser, dimensional sensors, all these are developing on the global market as part of the 4th industrial revolution, Industry 4.0. The TTM is combining the factory floor technologies with the informatics systems as ERP, Customer Portals, and MES, through a specific algorithm and based on PLC and sensorial hardware. The TTM is becoming a mandatory requirement for automotive and not only industry as stated in the new norms of AIAG (American Industrial Automotive Group), VDA (German Association of the Automotive Industry), and JAMA - Japan Automobile Manufacturers Association. The approach of this paper is a theoretical presentation of the practical experiments presenting the most modern solution in terms of software, sensorial installations, monitored equipment and the realized outputs. The TTM concept are not yet fully mature, various solutions being deployed on the market with specificities for diverse industries.