bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimization Modelling of a Catamaran Hull Form towards Reducing Ship’s Total Resistance
Authors: Ahmad Fitriadhy  , Nurul Shukna Rizat  , Atiyah Raihanah Abd Razak  , Sheikh Fakhruradzi Abdullah  , Faisal Mahmuddin  , Alamsyah Kurniawan
Published: May 2022

Due to the increasing of fuel prices and volatile of environmental regulations, it is a challenge for Naval Architects to design a ship dealing with an optimum ship’s total resistance. The conventional design of catamaran hull has not satisfied yet to reduce the ship’s total resistance. This paper presents a numerical investigation into gaining sufficient reduction of the ship’s total resistance of catamaran through optimizing her hull form. To achieve this research objectives, a numerical optimization modelling coupled with a Computational Fluid Dynamics (CFD) approach has been successfully conducted. Several parameters such as length, beam and draft of catamaran hull have been taken into account towards reducing the ship’s total resistance. Here, the simulation constraints are applied to obtain the optimum dimension, where the length, beam and draft of the catamaran hull were optimized within the range of 1.2 m to 1.5 m, 0.11 m to 0.14 m and 0.07 m to 0.08 m, respectively. In general, the optimization simulation revealed that the optimum dimension of the catamaran hull resulted in reduction of the total ship’s resistance. The results showed that the optimum length, beam and draft of hull led to reduce by 21.08%, 16.95% and 17.91%, respectively. Merely, this numerical optimization simulation provides a useful way for reducing the total ship’s resistance of the catamaran at the preliminary design stage.
Spectral analysis for identification of plant ecosystems in Brazilian Atlantic Forest / Análise espectral para identificação de ecossistemas vegetais na Mata Atlântica Brasileira
Authors: Dos Santos Eric Bem , Da Silva Hernande Pereira , Alves Rayanna Barroso de Oliveira , Da Silva Jose Severino Bento , De Albuquerque Jones Oliveira
Published: May 2022

The creation of the Guadeloupe EPA aimed to protect natural ecosystems and promote sustainable development in atlantic forest fragments existing in Pernambuco, Brazil. However, even with the State Decree formalizing these objectives, the ecosystems of the Atlantic Forest Biome present at the site suffered serious data by anthropic actions. For the study of these ecosystems, spectral analysis was an excellent channel of connection between geotechnologies and phytogeography of the site, allowing to study the location and type of vegetation in the extension of the Conservation Unit. From this perspective, the present research aimed to differentiate the atlantic forest ecosystems through spectral analysis. The results of spectral analysis allowed to indicate that in the identification of the Dense Ombrófila Forest the best specific combination is Atmospheric Penetration (PA) in its Pixel (PI) α. Mangrove in turn can be better identified in Infrared Vegetation (IVV) - Ranging from 150 to 220 Ash Levels (NC) - in pi α and also in PI β and PI γ varying in values very close to 50NC. Regarding restinga it is estimated that it can be accurately identified in Agriculture (AG), especially in pi γ, and also in Enhanced Vegetation Index (EVI) and Normalized Difference Water Index (NDWI), in all its Pixels.
THE INFLUENCE OF SUPPLY CHAIN MANAGEMENT PRACTICES ON SUPPLY CHAIN PERFORMANCE: THE MODERATING ROLE OF INFORMATION QUALITY
Authors: Bani Hani Jehad
Published: May 2022

Purpose – The main aim of this investigation is to introduce a framework for combining information quality concerning with contextual and representational relevance, and intrinsic accuracy in supply chain management practices to develop supply chain performance in Saudi companies.
Research methodology – Inferential technique used to examine the interplay between constructs of the study. SEM was run in order to assess and estimate the causal relationship among variables.
Findings – The significant effect of information quality on SCP as well as the significant effect of SCMPs on SCP. Furthermore, it was found that the information quality could significantly moderate the interplay between SCP and SCMPs.
Research limitations – This study conducted on 150 Saudi manufacturing companies during the year 2021, in future, the findings can be adapted for other sectors of the Saudi economy.
Practical implications – This study has implications for the industrial managers and key personnel. The study provides strong evidence revealing that higher level of integration between SCMPs and quality of information can lead to enhanced supply chain performance.so the proposed model can be used in the practical activities of service sectors In the future; it is possible to change and/ or add key variables and further expand the field of use of the model.
Originality/Value – The study contributed in determining main practices of supply Chan management in industrial sector of Saudi Arabia considering their influence on supply chain performance, as well as this study contributed in showing the engagement of information quality in supply chain management.
The Hosts of X-Ray Absorption Lines Toward AGNs
Authors: Huber Maggie C. , Bregman Joel N.
Published: May 2022

Most baryonic matter in the universe exists in gaseous form and can be found in structures such as galactic halos and the low-density intergalactic medium. Proposed X-ray spectroscopy missions such as Athena, Arcus, and Lynx will have the capability to identify absorption lines in spectra toward bright active galactic nuclei (AGNs), which can be used as tools to probe this missing matter. In this study, we examine the optical fields surrounding 15 primary observing targets and identify the foreground galaxies and galaxy groups that are potential hosts of absorption. We record the basic properties of the potential host and their angular and physical separation from the AGN line of sight. This process is done by marking the location of various galaxies and groups in optical images of the field surrounding the target and plotting their angular separation versus redshift to gauge the physical proximity to the background source. We identify the surrounding objects according to those with measured redshifts and those that require accurate redshift measurements.
A Zwicky Transient Facility Look at Optical Variability of Young Stellar Objects in the North America and Pelican Nebulae Complex
Authors: Hillenbrand Lynne A. , Kiker Thaddaeus J. , Gee Miles , Lester Owen , Braunfeld Noah L. , Rebull Luisa M. , Kuhn Michael A.
Published: May 2022

We present a study of 323 photometrically variable young stellar objects that are likely members of the North America and Pelican nebulae star-forming region. To do so, we utilize over two years of data in the g and r photometric bands from the Zwicky Transient Facility. We first investigate periodic variability, finding 46 objects (∼15% of the sample) with significant periods that phase well and can be attributed to stellar rotation. We then use the quasiperiodicity (Q) and flux asymmetry (M) variability metrics to assign morphological classifications to the remaining aperiodic light curves. Another ∼39% of the variable star sample beyond the periodic (low Q) sources are also flux-symmetric, but with a quasiperiodic (moderate Q) or stochastic (high Q) nature. Concerning flux-asymmetric sources, our analysis reveals ∼14% bursters (high negative M) and ∼29% dippers (high positive M). We also investigate the relationship between variability slopes in the g versus g − r color–magnitude diagram, and the light-curve morphological classes. Burster-type objects have shallow slopes, while dipper-type variables tend to have higher slopes that are consistent with extinction-driven variability. Our work is one of the earliest applications of the Q and M metrics to ground-based data. We therefore contrast the Q values of high-cadence and high-precision space-based data, for which these metrics were designed, with Q determinations resulting from degraded space-based light curves that have the cadence and photometric precision characteristic of ground-based data.
Photochemical Runaway in Exoplanet Atmospheres: Implications for Biosignatures
Authors: Ranjan Sukrit , Seager Sara , Zhan Zhuchang , Koll Daniel D. B. , Bains William , Petkowski Janusz J. , Huang Jingcheng , Lin Zifan
Published: May 2022

About 2.5 billion years ago, microbes learned to harness plentiful solar energy to reduce CO2 with H2O, extracting energy and producing O2 as waste. O2 production from this metabolic process was so vigorous that it saturated its photochemical sinks, permitting it to reach “runaway” conditions and rapidly accumulate in the atmosphere despite its reactivity. Here we argue that O2 may not be unique: diverse gases produced by life may experience a “runaway” effect similar to O2. This runaway occurs because the ability of an atmosphere to photochemically cleanse itself of trace gases is generally finite. If produced at rates exceeding this finite limit, even reactive gases can rapidly accumulate to high concentrations and become potentially detectable. Planets orbiting smaller, cooler stars, such as the M dwarfs that are the prime targets for the James Webb Space Telescope (JWST), are especially favorable for runaway, due to their lower UV emission compared to higher-mass stars. As an illustrative case study, we show that on a habitable exoplanet with an H2–N2 atmosphere and net surface production of NH3 orbiting an M dwarf (the “Cold Haber World” scenario), the reactive biogenic gas NH3 can enter runaway, whereupon an increase in the surface production flux of one order of magnitude can increase NH3 concentrations by three orders of magnitude and render it detectable by JWST in just two transits. Our work on this and other gases suggests that diverse signs of life on exoplanets may be readily detectable at biochemically plausible production rates.
Search for the Birefringence of Gravitational Waves with the Third Observing Run of Advanced LIGO-Virgo
Authors: Zhao Zhi-Chao , Cao Zhoujian , Wang Sai
Published: May 2022

Gravitational waves would attain birefringence during their propagation from distant sources to the Earth, when the charge, parity, and time reversal (CPT) symmetry is broken. If it was sizeable enough, such birefringence could be measured by the Advanced LIGO, Virgo, and KAGRA detector network. In this work, we place constraints on the birefringence of gravitational waves with the third observing run of this network, i.e., two catalogs GWTC-2 and GWTC-3. For the dispersion relation ω
2 = k
2 ± 2ζ
k
3, our analysis shows the up-to-date strictest limit on the CPT-violating parameter, i.e.,

ζ
=

4.07

−
5.79

+
5.91

×

10

−
17

m

, at 68% confidence level. This limit is stricter by ∼5 times when compared to the existing one (∼2× 10−16 m) and stands for the first ∼10 GeV-scale test of the CPT symmetry in gravitational waves. The results of the Bayes factor strongly disfavor the birefringence scenario of gravitational waves.
Elevated Hot Gas and High-mass X-Ray Binary Emission in Low-metallicity Galaxies: Implications for Nebular Ionization and Intergalactic Medium Heating in the Early Universe
Authors: Lehmer Bret D. , Eufrasio Rafael T. , Basu-Zych Antara , Garofali Kristen , Gilbertson Woodrow , Mesinger Andrei , Yukita Mihoko
Published: May 2022

High-energy emission associated with star formation has been proposed as a significant source of interstellar medium (ISM) ionization in low-metallicity starbursts and an important contributor to the heating of the intergalactic medium (IGM) in the high-redshift (z ≳ 8) universe. Using Chandra observations of a sample of 30 galaxies at D ≈ 200–450 Mpc that have high specific star formation rates of 3–9 Gyr−1 and metallicities near Z ≈ 0.3Z
⊙, we provide new measurements of the average 0.5–8 keV spectral shape and normalization per unit star formation rate (SFR). We model the sample-combined X-ray spectrum as a combination of hot gas and high-mass X-ray binary (HMXB) populations and constrain their relative contributions. We derive scaling relations of

log

L

0.5
–
8

keV

HMXB

/SFR = 40.19 ± 0.06 and

log

L

0.5
–
2

keV

gas

/SFR

=

39.58

−
0.28

+
0.17

;

significantly elevated compared to local relations. The HMXB scaling is also somewhat higher than

L

0.5
–
8

keV

HMXB

–SFR-Z relations presented in the literature, potentially due to our galaxies having relatively low HMXB obscuration and young and X-ray luminous stellar populations. The elevation of the hot gas scaling relation is at the level expected for diminished attenuation due to a reduction of metals; however, we cannot conclude that an

L

0.5
–
2

keV

gas

–SFR-Z relation is driven solely by changes in ISM metal content. Finally, we present SFR-scaled spectral models (both emergent and intrinsic) that span the X-ray-to-IR band, providing new benchmarks for studies of the impact of ISM ionization and IGM heating in the early universe.
A Model-based Technique for Ad Hoc Correction of Instrumental Polarization in Solar Spectropolarimetry
Authors: Jaeggli Sarah A. , Schad Thomas A. , Tarr Lucas A. , Harrington David M.
Published: May 2022

We present a new approach for correcting instrumental polarization by modeling the nondepolarizing effects of a complex series of optical elements to determine physically realizable Mueller matrices. Provided that the Mueller matrix of the optical system can be decomposed into a general elliptical diattenuator and general elliptical retarder, it is possible to model the crosstalk between both the polarized and unpolarized states of the Stokes vector and then use the acquired science observations to determine the best-fit free parameters. Here we implement a minimization for solar spectropolarimetric measurements containing photospheric spectral lines sensitive to the Zeeman effect using physical constraints provided by polarized line and continuum formation. This model-based approach is able to provide an accurate correction even in the presence of large amounts of polarization crosstalk and conserves the physically meaningful magnitude of the Stokes vector, a significant improvement over previous ad hoc techniques.
An Implementation of Stochastic Forces for the N-body Code REBOUND
Authors: Rein Hanno , Choksi Nick
Published: May 2022

We describe the implementation of a new module which can be used to simulate physical systems in which the motion of particles is affected by stochastic forces. Such forces are expected to be present in turbulent circumstellar disks or remnant planetesimal disks. Our implementation offers a convenient way to generate correlated noise with a user-specified amplitude and auto-correlation time for each particle. The module has minimal memory requirements and is freely available within the REBOUNDx additional effects library.
Acute systemic complications of intravitreal bevacizumab and triamcinolone injections – a comparative study
Authors: Johari Mohammad Karim , Askari Malihe , Amini Abdulrahim , Yasemi Masoud
Published: May 2022

Introduction: Macular edema is a common visual threatening complication in patients with diabetic retinopathy and retinal vein occlusion. The injection of intravitreal drugs, such as anti-vascular endothelial growth factor (anti-VEGF) and corticosteroids, revolutionized the treatment of these diseases.

Aim: To compare and assess the acute systemic complications of intravitreal bevacizumab and triamcinolone injections in patients with diabetic retinopathy and retinal vein occlusion.

Materials and methods: The study population included 211 patients with diabetic retinopathy and retinal vein occlusion who required intravitreal injections of bevacizumab and triamcinolone. In this study, 118 patients had generally received intravitreal injections with bevacizumab and the rest (93 patients) injections with triamcinolone. Experimental data, including demographic information, number of injections, the history of comorbidities, intraocular pressure, and systemic hypertension before and after injections, were recorded on specific forms following groups’ classification. In addition, the incidence of various complications was investigated during one month after the intravitreal injections.

Results: In the present study, we included 211 patients (mean age 62.41±11.34 years, median - 63 years). The results showed that there was no significant correlation between the injectable drug and changes in increased intraocular pressure (IOP) (p=0.66). No significant difference was detected for systemic hypertension in any of the studied groups. On the other hand, the incidence of complications of blood sugar, facial skin redness, neurological problems of TIA and CVA, myocardial infarction, vascular problems after injection, and ocular complications were estimated to be zero, 1.4, 0, 0.8, 0, and 6.1%, respectively.

Conclusions: Overall, the results indicated a prevalence of 1.4% for systemic complications and a prevalence of 6.1% for ocular complications. Accordingly, it seems that intravitreal injections of both drugs studied in the present study are placed in the group of low complication medications.
Quality of life in diabetic foot ulcer, grade 3: associated demographic factors
Authors: Polikandrioti Maria
Published: May 2022

Abstract

Introduction: Patients with diabetic foot ulcer grade 3 experience some limitations that adversely affect their quality of life (QoL).

Aim: The aim of the study was to explore demographic characteristics associated with the quality of life of diabetic foot ulcer patients, grade 3.

Materials and methods: The present study recruited 120 diabetic foot ulcer patients. Data collected by completion of SF-36 Health Survey (SF-36).

Results: Of the 120 participants, 65.8% were men and 73% were more than 60 years of age. Patients showed moderate to high levels of quality of life in social functionality, energy/fatigue, emotional well-being, and physical pain (medians: 50, 60, 72, and 67.5, respectively) and poor levels in physical functioning, role physical, and role emotional (medians: 22, 0 and 0, respectively). In addition, patients had moderate levels of quality of life in general health (median: 48.5). ﻿It was observed that physical functioning was significantly associated with place of residence (p=0.005). Moreover, physical role was significantly associated with age (p=0.020) and occupation (p=0.018), while emotional role was significantly associated with age (p=0.012), marital status (p=0.016), and occupation (p=0.012). Energy/fatigue was significantly associated with age (p=0.026), marital status (p=0.018), and occupation (p=0.009). Emotional well-being was significantly associated with gender (p=0.009), level of education (p=0.001), and occupation (p=0.007). Social functionality was significantly associated with marital status (p=0.001) while pain was significantly associated with education level (p=0.010). General health was significantly associated with marital status (p=0.037), and place of residence (p=0.024).

Conclusions: The findings of the present study may adequately inform stakeholders in the field of diabetic foot ulcer grade 3 when planning effective care.
Le porno prend la place laissée vacante par les adultes dans l’éducation à la sexualité
Authors: Rohmer Thomas , Gilloots Marie , Stavroulakis Sophie
Published: May 2022

Résumé Comment lutter contre l’exposition des mineurs à la pornographie ? Au cours de cette interview, Thomas Rohmer expose les actions de l’Observatoire de la parentalité et de l’éducation numérique ( open) sur le plan juridique pour imposer des contraintes au secteur de la pornographie en ligne. Il présente également la réflexion et les outils à destination des adultes pour leur permettre de ne pas esquiver les questions des adolescents concernant la sexualité, et les actions que mène l’association avec les acteurs de terrain, parents ou professionnels. Il interroge enfin la mise en œuvre de l’éducation à la sexualité à l’Éducation nationale.
Mineurs auteurs d’infractions sexuelles : les révolutions du Code de la justice pénale des mineurs sur le discernement et la césure pénale
Authors: Le Dévédec Benoît
Published: May 2022

Résumé Entré en vigueur le 30 septembre 2021, le Code de la justice pénale des mineurs entend améliorer le traitement de la délinquance et de la criminalité juvéniles. Parmi une multitude de dispositions nouvelles ou simplement dépoussiérées, deux d’entre elles peuvent retenir plus particulièrement l’attention : la définition du discernement du mineur et la procédure de césure pénale. Dans la prise en charge de ce public spécifique que sont les mineurs auteurs d’infractions sexuelles, un éclairage sur ces éléments peut être d’une certaine utilité.
Le défi de la maîtrise et du contrôle
Authors: Chevreul Arnaud
Published: May 2022

Individuellement ou collectivement, les hommes sont impuissants, sidérés ou pétrifiés face à l’incertitude. Ils ont donc développé une culture de la maîtrise et du contrôle. Or la modélisation, la réalité virtuelle, propose d’extraordinaires outils pour ce faire. Mais aujourd’hui, l’analyse du rôle que celle-ci joue et de la place qu’elle occupe, notamment, dans deux des menaces les plus fortes qui guettent nos sociétés engage à développer la capacité de recours au réel, aux solutions concrètes.
La mort à distance interrogée
Authors: Desjars de Keranrouë Romain , Rival Xavier
Published: May 2022

Aujourd’hui, en l’absence de toute aviation adverse, évoluant à une altitude suffisante pour ne pas être inquiétés par les défenses anti-aériennes ennemies, les pilotes et les navigateurs de combat ne redoutent que l’accident qui les conduirait à s’éjecter en territoire hostile. Les équipages de drones armés, bien qu’ils soient déployés sur les théâtres d’opérations où ils opèrent, courent encore moins de risques. Et les développements technologiques laissent d’ailleurs entrevoir de nouvelles façons de combattre à distance dans le milieu spatial ou le cyberespace. Faire la guerre serait-il alors pour eux de l’ordre du virtuel ?
Les Peuls de l’eau : savoir et littérature
Authors: Ndiaye Oumar Djiby
Published: May 2022

Les Soubalbé (sing. Thiouballo ) sont des pêcheurs qui appartiennent au groupe sociolinguistique peul. On les retrouve essentiellement au Foûta-Tôro, une entité territoriale à cheval sur la Mauritanie et le Sénégal. La pêche fluviale constitue leur principale activité économique. Ces Peuls de l’eau ont su créer et développer, à travers leur histoire plusieurs fois séculaire, des techniques de pêche très élaborées ainsi que toute une littérature pour accompagner leur profession. Cette littérature appelée pékâne est faite de chants où se mêlent savoir occulte, poésie descriptive et récits épiques.
Aménagements des eaux de surface et dynamique des pratiques agropastorales au Guidimakha
Authors: Effantin-Touyer Rachel
Published: May 2022

Depuis les grandes sécheresses des années 1970 et 1980 au Sahel, la maîtrise des eaux de surface est au cœur des enjeux de développement rural dans cette région. Après une période de grands projets, de petits aménagements se multiplient sur les oueds du bassin du fleuve Sénégal. L’état de mise en valeur des petits barrages au Guidimakha interroge sur la nécessaire compréhension des enjeux locaux dans les opérations d’aide au développement. À Melgué comme à Sabouciré, le seuil de rétention des eaux a modifié le rapport des populations aux ressources naturelles, de façon spécifique à chaque terroir. Les petits barrages se révèlent être également des supports de changement social, concernant la cohabitation entre communautés ethniques ou entre groupes de statuts différents dans un village.
Eaux usées et pollutions à Nouakchott
Authors: Séméga Bakari Mohamed
Published: May 2022

La ville de Nouakchott connaît depuis sa création une démographie et une urbanisation spectaculaires qui demandaient plus d’eau potable produisant beaucoup d’eaux usées. En raison du manque d’infrastructures d’assainissement liquide pour la collecte et le traitement de ces dernières pour pallier les effets néfastes, l’insalubrité s’est installée progressivement. Elle est aggravée par la stagnation récente pendant l’hivernage d’eaux pluviales polluées. L’avènement de l’alimentation en eau potable de Nouakchott par le fleuve Sénégal a intensifié la consommation d’eau et la production d’eaux usées qui a posé une problématique aiguë, nécessitant une résolution urgente. Dans cet article, l’examen de ces eaux usées est effectué pour cerner les pollutions et effets néfastes induits et de faire ressortir après traitement, leurs aptitudes à la réutilisation dans le maraîchage urbain.
Les séparatismes pro-russes en Moldavie
Authors: Lambert Michael Éric
Published: May 2022

La Moldavie, petit pays latin d’Europe orientale, est apparue depuis le 24 février sur les cartes. À la frontière entre Roumanie et Ukraine, Chişinău, la capitale, doit compter avec deux territoires, l’un sécessionniste – la Transnistrie – et l’autre autonomiste – la Gagaouzie – qui pourraient faire basculer le destin des Moldaves.
Le non-conformisme yougoslave : l’art derrière le mur de Berlin
Authors: de Kaniv Nathalie
Published: May 2022

L’espace yougoslave a été avant sa décomposition politique une plateforme culturelle innovante bousculant la pesanteur conformiste du système communiste. Cette histoire artistique a contribué à émanciper l’opinion publique des modèles d’expression alors en vigueur.
Défense de l’Europe et Europe de la défense (2/2)
Authors: Rameau Hervé , Roux Pascal
Published: May 2022

À l’heure de la guerre en Ukraine, la défense de l’Europe est redevenue une priorité avec un engagement concret de l’Union européenne et de l’Otan. Dès lors, il est nécessaire et urgent d’améliorer les processus de coopération entre les deux institutions avec des mécanismes plus efficaces.
Le Dragon face à l’Aigle : la rivalité sino-américaine par le hublot de l’économie
Authors: Angleys Vianney
Published: May 2022

La rivalité sino-américaine se développe sur de nombreux champs d’action dont l’économie. Entre indépendance et concurrence, les deux puissances voient leurs économies en compétition. La guerre monétaire entre le dollar et le yuan est une réalité, s’appuyant sur une montée en puissance des forces armées de Pékin.
Engagement des jeunes européens dans la défense
Authors: Gueye Anna , Vydelingum Anaïs , Guyotat Louise-Marie , Quervel Théo , Sorasso-Bluem Marin
Published: May 2022

Les enjeux de défense et de sécurité sont essentiels pour l’Europe, à l’aune de la crise à l’Est. Il importe que les jeunes s’emparent et participent à construire un esprit de défense solide et s’inscrivent dans une démarche renforçant une Europe solidaire et démocratique.
Measuring the mobility impact on the COVID-19 pandemic
Authors: Nepomuceno Thyago Celso C. , Garcez Thalles Vitelli , Silva Lúcio Camara e , Coutinho Artur Paiva
Published: May 2022

This assessment aims at measuring the impact of different location mobility on the COVID-19 pandemic. Data over time and over the 27 Brazilian federations in 5 regions provided by Google's COVID-19 community mobility reports and classified by place categories (retail and recreation, grocery and pharmacy, parks, transit stations, workplaces, and residences) are autoregressed on the COVID-19 incidence in Brazil using generalized linear regressions to measure the aggregate dynamic impact of mobility on each socioeconomic category. The work provides a novel multicriteria approach for selecting the most appropriate estimation model in the context of this application. Estimations for the time gap between contagion and data disclosure for public authorities' decision-making, estimations regarding the propagation rate, and the marginal mobility contribution for each place category are also provided. We report the pandemic evolution on the dimensions of cases and a geostatistical analysis evaluating the most critical cities in Brazil based on optimized hotspots with a brief discussion on the effects of population density and the carnival.
A survey to evaluate knowledge, attitudes, and practices associated with the risk of foodborne infection in a sample of Sicilian general population
Authors: Amodio Emanuele , Calamusa Giuseppe , Tiralongo Salvatore , Lombardo Federica , Genovese Dario
Published: May 2022

Although foodborne infections contracted at home are frequent diseases worldwide, there is a general lack of information. Main purpose of this cross-sectional study was to evaluate knowledge, attitudes, and practices (KAP) of a sample of the general Sicilian population about the risk of contracting foodborne diseases. It was carried out through a web-based questionnaire to a Sicilian population sample. The questionnaire collected socio-demographic data, health issues, KAP and self-reported diseases. Scores were calculated for summarizing the results. A total of 373 subjects participated into the study. Overall, 65.15% of the participants were females, 48.26% of all respondents were aged between 18 and 29 years and over one-third were students (34.58%). At least one episode of vomiting/diarrhoea in the previous 3 months was reported by 119 respondents. Practices were associated with knowledge (R2 = 0.02; p < 0.01) and attitudes (R2 = 0.13; p < 0.001) although with low degree of correlation. A lower practice score was statistically significantly associated with both onset of foodborne transmitted infections in participants and among the cohabitants of participants. Our results confirm that foodborne disease can be strongly associated with food handling at home and with unsafe practices. Specific education on food safety could help to reduce the risk but the adoption of good practices of food manipulation is the real key to assure a reduction in food outbreaks in residences.
BERT-BU12 Hate Speech Detection Using Bidirectional Encoder-Decoder
Authors: Gupta Shailja , Kaur Manpreet , Lakra Sachin
Published: May 2022

In the recent times transfer learning models have known to exhibited good results in the area of text classification for question-answering, summarization, next word prediction but these learning models have not been extensively used for the problem of hate speech detection yet. We anticipate that these networks may give better results in another task of text classification i.e. hate speech detection. This paper introduces a novel method of hate speech detection based on the concept of attention networks using the BERT attention model. We have conducted exhaustive experiments and evaluation over publicly available datasets using various evaluation metrics (precision, recall and F1 score). We show that our model outperforms all the state-of-the-art methods by almost 4%. We have also discussed in detail the technical challenges faced during the implementation of the proposed model.
Human Identification Using Electrocardiogram Signal as a Biometric Trait
Authors: Ibrahim Anwar E. , Abdel-Mageid Salah , Nada Nadra , Elshahed Marwa A.
Published: May 2022

Biometrics is an interesting study due to the incredible progress in security. Electrocardiogram (ECG) signal analysis is an active research area for diagnoses. Various techniques have been proposed in human identification system based on ECG. This work investigates in ECG as a biometric trait which based on uniqueness represented by physiological and geometrical of ECG signal of person.In this paper, a proposed non-fiducial identification system is presented with comparative study using Radial Basis Functions (RBF) neural network, Back Propagation (BP) neural network and Support Vector Machine (SVM) as classification methods. The Discrete Wavelet Transform method is applied to extract features from the ECG signal. The experimental results show that the proposed scheme achieves high identification rate compared to the existing techniques. Furthermore, the two classifiers RBF and BP are integrated to achieve higher rate of human identification.
Ballot Blockchain System Design and Development on Ethereum Platform
Authors: Fu Meng-Hsuan , Lee An-Shyang
Published: May 2022

Ballots are often hold for fair decisions such as party theme selecting, however, the existing traditional ballot has some problems involving amount of human resources, cost of places, equipment, time and traffic, and repeated procedures. In order to solve the issues aforementioned, a ballot blockchain system is designed and implemented based on the smart contract of Ethereum. It is designed on the core blockchain technologies of the decentralized ledger technology, using a secure hash algorithm, anonymous user, incorruptible data, and adopting a public blockchain. The ballot blockchain system is implemented based on the MetaMask verification and the Remix interface development environment. The smart contract plays the role of the decision-maker for controlling ballot activities instead of numerous human tasks. All ballot transactions are recorded in the ballot blockchain permanently when the ballot completed. The aim of the ballot blockchain system is to achieve a fair, less time-consuming, secured, and transparent environment.
Online Learning Behavior Feature Mining Method Based on Decision Tree
Authors: Shao Juxin , Gao Qian , Wang Hui
Published: May 2022

This research mainly discusses the design of online learning behavior feature mining method based on decision tree. Data collection is the real-time collection of online learning behavior data from distance learning websites. OWC (Office Web Component) technology is used to draw real-time charts on the page. Online learning students are selected as the research object, and the student's system log data and questionnaire data are selected. When combining the pre-pruning method and the post-pruning method to make decisions after the tree is pruned, the same source data is used to adjust, test and evaluate the decision tree model. The evaluation process to generate a complete decision tree is completed by the c4.5tree algorithm in C4.5, which can be named with a suffix of .names The type definition file is used to record the type of each attribute item or the range of possible values. In the study, the prediction accuracy rate of predicting learning effect based on "online learning behavior" reached more than 66%.
Research on Value-Added Effect of Venture Capital on Enterprises Based on Data Mining Technology
Authors: Xu Nini
Published: May 2022

Based on data mining technology, this paper introduces venture capital, which is an external strategic investor factor, and takes the maximization of enterprise value as the goal, and discusses the characteristics of the optimal ownership structure, the optimal shareholding ratio and the ways to optimize the ownership structure under the participation of venture capital, so as to accurately increase the value of enterprises and grasp the role of venture capital in the development of start-up enterprises. Venture capital enterprises will have rich contents, which are mainly reflected in financial returns. That is to say, if enterprises withdraw from investment after venture capital, they will have direct benefits. In the current environment of relatively scarce technical resources, enterprises should change the situation of passively accepting venture capital to provide financial capital, and actively seek venture capital which can satisfy the complementary resources and easily reach mutual trust, so as to achieve win-win cooperation.
Application of Fuzzy Support Vector Machine in Short-Term Power Load Forecasting
Authors: Yang Jie , Tang Yachun , Duan Huabin
Published: May 2022

The realization of short-term load forecasting is the basis of system planning and decision-making, and it is an important index to evaluate the safety and economy of power grid.In order to accurately predict the power load under the influence of many factors, a new short-term power load prediction method based on fuzzy support vector machine and similar daily linear extrapolation is proposed, which combinesthe method of fuzzy support vector machine and linear extrapolation of similar days. The method first selects similar days according to the effect of integrated weather and time on load. Then the fuzzy membership of the training sample is obtained by the normalization processing, and the daily maximum and minimum load is predicted by the fuzzy support vector machine. Finally, the load prediction value is obtained by combining the load trend curve obtained by the similar daily linear extrapolation method. and this method is feasible and effective for short-term forecasting of power load.
Erratum to “Uniform boundary controllability and homogenization of wave equations”
Authors: Lin Fanghua , Shen Zhongwei
Published: May 2022

This erratum corrects the statements and proofs of Theorems 1.1 and 1.2 of [J. Eur. Math. Soc. 24, 3031–3053 (2022)].
Quantum Euclidean spaces with noncommutative derivatives
Authors: Gao Li , Junge Marius , McDonald Edward
Published: May 2022

Quantum Euclidean spaces, as Moyal deformations of Euclidean spaces, are the model examples of noncompact noncommutative manifold. In this paper, we study the quantum Euclidean space equipped with partial derivatives satisfying canonical commutation relation (CCR). This gives an example of semifinite spectral triple with nonflat geometric structure. We develop an abstract symbol calculus for the pseudo-differential operators with noncommuting derivatives. We also obtain a local index formula in our setting via the computation of the Connes–Chern character of the corresponding spectral triple.
Mapping properties of Fourier transforms
Authors: Triebel Hans
Published: May 2022

The paper deals with continuous and compact mappings generated by the Fourier transform between distinguished function spaces on the Euclidean

n

-space. The degree of compactness will be measured in terms of related entropy numbers. We are more interested in the interplay of already available ingredients than in generality.
Validating the implementation of substance abuse policy in South Africa: The voices of East London citizens
Authors: Bala Samkelo , Kang’ethe Simon Murote
Published: May 2022

This study employed a purposive sampling technique to examine the implementation of substance abuse policy in South Africa with the participation of East London citizens. The study applied a qualitative approach and paradigm that allowed for the description and exploration of the circumstances surrounding substance abuse as discussed by sixteen participants engaged in in-depth interviews and a focus group discussion. Demographically, the participants’ age ranged from 42 to 59 years with a mean of 50.1. The gender distribution was skewed with eleven male and five female participants. Among the participants were fourteen blacks and only two whites. The participants were recruited through a purposive sampling technique. The data were analysed manually through thematic analysis. Inter alia, the study revealed the limited success of substance abuse policies; poor intergovernmental policy implementation; a paucity of qualified human resources and politics and corruption serving as stumbling blocks to proper policy implementation. This study revealed a need to strengthen the monitoring and evaluation of substance abuse policies in South Africa.
Substance use, social support and socio-demographic factors among commercial drivers in Ibadan
Authors: Osamika Bamidele Emmanuel , Adeshina Adewale , Folorunso Stephen Oluwatimilehin , Osamika Adenike Esther , Ogundipe Emmanuel , Tomoloju Busayo , Akingbade Retta
Published: May 2022

Commercial drivers often engage in long and irregular working hours, and as such suffer back pain, fatigue, stress and thereafter use some psychoactive substance to cope with their job. Even though most studies on substance use have been on general population, limited information is available on the use of substance and roles of socio-demographic factors among commercial drivers. This study therefore examined the roles of socio-demographic factors (age, years of driving, gender and social support) in substance use among commercial drivers in Ibadan, Nigeria.The study employed a cross-sectional design and purposive sampling technique to recruit 250 commercial drivers. A structured questionnaire was used to gather information on socio-demographic information, social support and substance use from the participants. Data were analyzed using descriptive statistics, correlation, Analysis of Variance and Independent t-test analysis. Results showed that years of driving significantly have a positive correlation with substance use. However, duration and hours spent on the driving did not have a significant independent relationship with substance use. Younger participants significantly engage more in substance use than older individuals. Similarly, female participants significantly engage more in substance use than male drivers. Additionally, participants with high social support mostly engage in substance use than participants with low social support. The study concluded that years of driving, age, gender and social support network of the drivers significantly plays an influencing roles in substance usage among commercial drivers in Ibadan. The study recommends that, in the organized substance use and abuse preventive program for drivers, the consideration for drivers’ socio-demographics factors is quite imperative, especially as more females and younger individuals with more social support are getting more involved in substance use.
Cross-sectional study of alcohol preferences and expenditures on food insecurity between urban and rural settings in Zambia
Authors: Paltzer Jason , Okafor Chukwuemeka , Chiluba Brian , Taylor Keyanna P.
Published: May 2022

This study investigated potential differences in rural and urban alcohol expenditures and the relationship between alcohol and food insecurity. The 2015 Zambia Living Conditions Monitoring Survey was used with a sample of 12,260 households. Bivariate analyses and logistical regression evaluated the differences in rural/urban alcohol preferences and the relationship between alcohol and food insecurity. Traditional brew consumption was found to be significantly higher in rural areas (p<0.001). Rural households with alcohol expenditures had 23 percent lower odds (OR: 0.770, p<0.01) of eating three or more meals a day compared to households without alcohol expenditures. Rural characteristics around alcohol consumption need to be taken into consideration when determining food security and nutrition policies. Alcohol assessments and services should be adapted to rural conditions in Zambia to increase the effectiveness of prevention programs.
Resource supervision and teaching effectiveness: Perspectives of physical and health education lecturers in train-the-trainer institutions in Nigeria
Authors: Akah Levi Udochukwu , Apie Artina Ayibeya , Ogabor Oseph Odey , Osaji Nsaha Nkang , Ahueansebhor Emmanuel , Akpa Stephen Ushie
Published: May 2022

The study assessed perspectives in the supervision of human and material resources and its contribution to the teaching effectiveness of Physical and Health Education Lecturers’ in Colleges of Education in South-South region of Nigeria. Two null hypotheses were formulated based on the specific objectives of the study. A 35-item questionnaire was developed by the researchers and used for data collection. A sample of 69 Physical and Health Education lecturers from 7 colleges out of 12 who offer Physical and Health Education were selected through the status sampling technique. Pearson Product Moment correlation was used in data analyses. It was revealed that teaching effectiveness of Physical and Health Education lecturers had significant relationship with the supervision of human resources in the colleges of education; also, involvement of lecturers in facilities supervision had significant influence on Physical and Health Education lecturers teaching effectiveness. Based on the findings, it is concluded that human resource and facilities supervision are institutional predictors of Physical and Health Education lecturers teaching effectiveness in these colleges of education. It was recommended that staff selection process should strictly be supervised by credible academics and recruitment based on merit. In addition, that lecturer (human resource) should be given opportunity to develop their professional capacities, through in-service training, conference and workshop. Thirdly, Lecturers of Physical and Health Education should be made to participate in practical supervision of equipment, facilities and other materials used in the facilitation of physical and health education activities.
Enhancing students’ learning experience and satisfaction through effective classroom planning and management
Authors: Offem Odim Otu , Inah Roland Afen , Unamba Chioma Precious
Published: May 2022

The study seek to examine how students’ learning experience and satisfaction could be enhanced through effective classroom management. This study adopted a descriptive survey. The study area was Calabar Urban, Cross River State, Nigeria. The population of the study consisted of 170 secondary school students (public and private). Three hypotheses were tested at 0.05 level significance. A four response structured questionnaire was used for data collection, validated by three experts with a reliability coefficient of 0.78. Data were analysed with t-test and one-way ANOVA. The findings revealed that students learning experience and satisfaction can be enhanced through effective classroom management. It was recommended that government and proprietors should provide resources for effective training and re-training of teachers for proper classroom management for better academic achievement.
Development and validation of a reverse phase High Performance Liquid Chromatographic method, using standard addition calibration, for determination of risperidone in human plasma
Authors: Oloyede Rukayyat Bukola , Salisu Awwalu , Nasir Ibrahim , Musa Aminu
Published: May 2022

Risperidone is a drug of choice in the management of psychosis and high performance liquid chromatography (HPLC) is regarded as the most sensitive and accurate method for quantitative analysis of risperidone, as well as other drugs having low plasma concentrations in biological fluids. A simple and accurate HPLC method was developed for the determination of risperidone in human plasma using the standard addition calibration technique to augment the weak signals due to low plasma concentrations of risperidone. Risperidone was eluted using isocratic mode with a mobile phase of methanol: acetonitrile (60:40) on a Chemisil ODS C18 column (250 mm×4.6 mm i.d., 5 μ particle size). The sample injection volume, flow rate, column temperature and wavelength of detection were set at 10 µl, 1.0 ml/min, 35 ˚C and 280 nm respectively. The run time for the method was 7 minutes, with risperidone having a retention time of 3.566 minutes. The method was linear within the concentration 10-50 ng/ml (R2= 0.998), with LOD and LOQ of 0.13 and 0.40 ng/ml respectively. The precision and relative error was 3.44 % and 3.38 % respectively. The developed method can be employed in the quantitative determination of risperidone in pharmacokinetic and bioequivalence studies.