bluuebunny/crossref_metadata_2025 huggingface dataset:
LAND USE/LAND COVER STUDY USING REMOTE SENSING AND GIS TO ASSESS THE PHYSICAL CHANGES IN THE SABARMATI RIVER BASIN, GUJARAT
Authors: Talsania Prachi , Mehta Abhinav , Mankad Archana
Published: February 2023

Land use/Land cover (LULC) is an essential mapping in sustaining and preserving our environment. The present study aims to analyze the changes in LULC for three decades by comparing classification statistics using Remote Sensing and GIS technology. The sub-basin of the Sabarmati River was selected for the study to measure the parameters of the decadal landscape changes to determine the minimum and maximum changes depending on climate change parameters. Future predictions are also performed to better understand the changes in the region to extract the information matching the current land use. The result indicates that during 2000 to 2030, agricultural land has increased along with the built-up area. Observations have also been done about river /water bodies area, which is also increased potentially; fallow land patches saw a reduction significantly while Barren land has increased. Lastly, Vegetation patches have also decreased by increasing agricultural and infrastructure activities. The result shows that urbanization is growing along with the agricultural land, while vegetation patches are falling.
Isolated avulsion fracture of the lesser tuberosity of the humerus
Authors:   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Nachawati Sofian , Stoica Ioan-Cristian ,   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania,   Foisor Clinical Hospital of Orthopedics and Traumatology and Osteoarticular TB, Bucharest, Romania, Popescu Roman ,   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Gheorghievici Gavril ,   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania,   Foisor Clinical Hospital of Orthopedics and Traumatology and Osteoarticular TB, Bucharest, Romania, Moldoveanu Theodor ,   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania, Haritinian Emil-George ,   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania,   Foisor Clinical Hospital of Orthopedics and Traumatology and Osteoarticular TB, Bucharest, Romania
Published: February 2023

Isolated lesser tuberosity fracture avulsion without an associated posterior shoulder dislocation or in the context of a three- or four-part proximal humerus fracture are extremely rare, with an estimated incidence rate of only 0.46 persons per 100,000. Diagnosis remains challenging, often leading to delayed treatment. In contrast with fractures of the greater tuberosity, there are no displacement guidelines to assist the surgeon in treatment decision-making for lesser tuberosity fractures. The aim of this study was to highlight diagnostic features as well as surgical treatment. We present a case of a 54-year-old male with an isolated lesser tuberosity fracture avulsion. We performed open reduction and osteosynthesis of the lesser tuberosity fragment with suture anchors and transosseous sutures. At 11-month follow-up the patient was able to normally perform his daily living and professional activities, had full, painless range of motion of the affected shoulder and regained almost full strength.
Magnetospheric Multiscale Observations of Markov Turbulence on Kinetic Scales
Authors: Macek Wiesław M. , Wójcik Dariusz , Burch James L.
Published: February 2023

In our previous studies we have examined solar wind and magnetospheric plasma turbulence, including Markovian character on large inertial magnetohydrodynamic scales. Here we present the results of the statistical analysis of magnetic field fluctuations in the Earth’s magnetosheath, based on the Magnetospheric Multiscale mission at much smaller kinetic scales. Following our results on spectral analysis with very large slopes of about −16/3, we apply a Markov-process approach to turbulence in this kinetic regime. It is shown that the Chapman–Kolmogorov equation is satisfied and that the lowest-order Kramers–Moyal coefficients describing drift and diffusion with a power-law dependence are consistent with a generalized Ornstein–Uhlenbeck process. The solutions of the Fokker–Planck equation agree with experimental probability density functions, which exhibit a universal global scale invariance through the kinetic domain. In particular, for moderate scales we have the kappa distribution described by various peaked shapes with heavy tails, which, with large values of the kappa parameter, are reduced to the Gaussian distribution for large inertial scales. This shows that the turbulence cascade can be described by the Markov processes also on very small scales. The obtained results on kinetic scales may be useful for a better understanding of the physical mechanisms governing turbulence.
ALMA Resolves the First Strongly Lensed Optical/Near-IR-dark
Galaxy
Authors: Giulietti Marika , Lapi Andrea , Massardi Marcella , Behiri Meriem , Torsello Martina , D’Amato Quirino , Ronconi Tommaso , Perrotta Francesca , Bressan Alessandro
Published: February 2023

We present high-resolution (≲0.″1) Atacama Large Millimeter/submillimeter Array
observations of the strongly lensed galaxy HATLASJ113526.2-01460 at redshift
z ∼ 3.1, discovered in the GAMA 12th field of
the Herschel-ATLAS survey. This gravitationally lensed system is remarkably
peculiar, in that neither the background source nor the foreground lens show a
clearly detected optical/near-IR Hubble Space Telescope-J band emission. We
perform accurate lens modeling and source morphology reconstruction in three
different (sub)millimeter continuum bands and in the C[ii] and CO(8−7)
spectral lines. The modeling indicates a foreground lensing (likely elliptical)
galaxy with mass ≳1011
M
⊙ at z ≳ 1.5, while the source
(sub)millimeter continuum and line emissions are amplified by factors μ ∼ 6–13. We estimate extremely compact sizes—≲0.5 kpc
for the star-forming region and ≲1 kpc for the gas component—with no clear
evidence of rotation or ongoing merging events. We perform broadband SED fitting
and retrieve the intrinsic demagnified physical properties of the source, which
is found to feature a very high star formation rate, ≳103
M
⊙ yr−1, which, given the compact sizes, is on the verge of
the Eddington limit for starbursts; the radio luminosity at 6 cm from the
available EVLA observations is consistent with star formation activity. The
galaxy is found to be extremely rich in gas ∼1011
M
⊙ and dust ≳109
M
⊙. The stellar content ≲1011
M
⊙ places the source well above the main sequence of star-forming
galaxies, indicating that the starburst is rather young, with an estimated age
∼108 yr. Our results indicate that the overall properties of
HATLASJ113526.2-01460 are consistently explained by in situ galaxy formation and
evolution scenarios.
An Ap Star Catalog Based on LAMOST DR9
Authors: Shi Fangfei , Zhang Huawei , Fu Jianning , Kurtz Donald , Xiang Maosheng
Published: February 2023

We present a sample of 2700 Ap stars in the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) DR9 catalog. The candidates are first selected to be in a temperature range typical of Ap stars by using the BP − RP color index from Gaia DR3. Then the 5200 Å flux depression features characteristic of Ap stars are visually checked in LAMOST DR9 spectra. The detailed spectral features are given by applying a modified spectral classification program, MKCLASS. The stellar parameters of these Ap stars, such as the T
eff,

log
g

, [Fe/H], [Si/H], and

v
sin
i

, are either extracted from a hot star catalog or derived through empirical relations and then a statistical analysis is carried out. The evolutionary stages are also discussed. Finally, we discuss the rotation and pulsation features of those that have TESS or Kepler light curves. Among these Ap stars, we find seven new rotation variables, one new roAp star, and a new δ Scuti pulsation of a previously known roAp star.
Unified Relationship between Cold Plasma Ejections and Flare Energies Ranging from Solar Microflares to Giant Stellar Flares
Authors: Kotani Yuji , Shibata Kazunari , Ishii Takako T. , Yamasaki Daiki , Otsuji Kenichi , Ichimoto Kiyoshi , Asai Ayumi
Published: February 2023

We often find spectral signatures of chromospheric cold plasma ejections accompanied by flares in a wide range of spatial scales in the solar and stellar atmospheres. However, the relationship between physical quantities (such as mass, kinetic energy, and velocity) of cold ejecta and flare energy has not been investigated in a unified manner for the entire range of flare energies to date. This study analyzed the spectra of cold plasma ejections associated with small-scale flares and solar flares (energy 1025–1029 erg) to supply smaller energy samples. We performed Hα imaging spectroscopy observation by the Solar Dynamics Doppler Imager on the Solar Magnetic Activity Research Telescope. We determined the physical quantities of the ejecta by cloud model fitting to the Hα spectrum. We determined the flare energy by differential emission measure analysis using the Atmospheric Imaging Assembly on board the Solar Dynamics Observatory for small-scale flares and by estimating the bolometric energy for large-scale flares. As a result, we found that the ejection mass M and the total flare energy E
tot follow a relation of

M
∝

E

tot

2

/

3

. We show that the scaling law derived from a simple physical model explains the solar and stellar observations with a coronal magnetic field strength as a free parameter. We also found that the kinetic energy and velocity of the ejecta correlate with the flare energy. These results suggest a common mechanism driven by magnetic fields to cause cold plasma ejections with flares on the Sun and stars.
Study of the Effect of Martian Dust Storms on Ionospheric Electron Density Based on Physical-grid Deep Neural Learning Technology
Authors: Zhong ShengBin , Chen Zhou , Deng Xiaohua , Tang RongXin
Published: February 2023

The behavior of the Martian ionosphere during global dust storms has always been a popular topic. Based on many Mars Atmosphere and Volatile Evolution observations, a Martian ionospheric electron density model is constructed herein using a physical-grid deep neural network algorithm. The precision of the model is proved to be high, and the R
2 value of the test set is 0.979. On this basis, the effects of global dust storms on the electron density and peak height of the Martian ionosphere are explored. The results show that the MY34 global dust storm significantly raised the peak height of the Martian electron layer, and its effects mainly ranged from 20°N to 55°N. The periodicity of the global daily average peak electron layer height following this dust storm was more regular than that before the dust storm.
Biochemical, physiological, and molecular characterisation of a large collection of aerobic endospore-forming bacteria isolated from Brazilian soils
Authors: Rosa Martins Paulo Henrique , Rabinovitch Leon , de Orem Juliana Capela , Silva Waldeyr Mendes C. , de Araujo Mesquita Felipe , de Magalhães Maria Ines Andre , de Andrade Cavalcante Danilo , Vivoni Adriana Marcos , de Oliveira Edmar Justo , de Lima Vera Cristina Pessoa , Brito Josiane Teixeira , De-Souza Marlene Teixeira
Published: February 2023

The aerobic endospore-forming bacteria (AEFB) comprise species of Bacillus and related genera and have long been regarded as prominent constituents of the soil bacterial community. The wide diversity of AEFB renders appropriate categorisation and generalisations a challenging task. We previously isolated 312 AEFB strains from Brazilian soils that we designated SDF (Solo do Distrito Federal) strains. To better understand the SDF diversity and explore their biotechnological potential, we addressed the biochemical and physiological profiles of these 312 environmental strains by performing 30 tests in this work. Of these, the 16S rRNA gene sequences segregated 238 SDF strains into four genera in the family Bacillaceae and two in the Paenibacillaceae. Bacillus spp. were the most prevalent, followed by species of Paenibacillus. We summarised the phenotypic test relationships among selected SDF strains using a Pearson correlation-based clustering represented in heatmaps. In practice, biochemical and physiological profiles are often less discriminatory than molecular data and may be unstable because of the loss of traits. Although these test reactions are not universally positive or negative within species, they may define biotypes and be efficient strain markers, enhancing the accuracy of unknown sample identification. It can also help select the most representative phenotypes of samples. Along with the other phenotypic and genotypic data, the present results are of great importance for the robust classification of the SDF strains within the scope of the polyphasic approach.
Drug delivery to the brain – lipid nanoparticles-based approach
Authors: Gugleva Viliana , Andonova Velichka
Published: February 2023

The complex structure of the human brain defines it as one of the most inaccessible organs in terms of drug delivery. The blood-brain barrier (BBB) represents a microvascular network involved in transporting substances between the blood and the central nervous system (CNS) – enabling the entry of nutrients and simultaneously restricting the influx of pathogens and toxins. However, its role as a protective shield for CNS also restricts drug access to the brain. Since many drugs cannot cross the BBB due to unsuitable physicochemical characteristics (i.e., high molecular weight, aqueous solubility, etc.), different technological strategies have been developed to ensure sufficient drug bioavailability. Among these, solid lipid nanoparticles (SLNs) and nanostructured lipid carriers (NLCs) are promising approaches thanks to their lipid nature, facilitating their brain uptake, small sizes, and the possibilities for subsequent functionalization to achieve targeted delivery. The review focuses on applying SLNs and NLCs as nanocarriers for brain delivery, outlining the physiological factors of BBB and the physicochemical characteristics of nanocarriers influencing this process. Recent advances in this area have also been summarized.
First record of the genus Touranella Attems, 1937 (Diplopoda, Polydesmida, Paradoxosomatidae) from Laos, with a description of a new species
Authors: Nguyen Anh D. , Sierwald Petra , Ware Stephanie
Published: February 2023

The paradoxosomatid genus Touranella Attems, 1937 is recorded from Laos for the first time, with a new species, Touranella champasaksp. nov., described here. The taxonomy of the genus is discussed, an identification key is provided, and the current distribution of all species is mapped.
L’écriture à l’ère du numérique : apport de la capture vidéo écran pour l’étude de la composition et de la reformulation
Authors: Séror Jérémie
Published: February 2023

Un nombre croissant de chercheurs se penchent sur l’apport des environnements numériques et leurs potentialités pour le développement de l’écriture en langue seconde et étrangère. Ces travaux sont particulièrement importants alors que l’écriture médiatisée par le numérique prend une part de plus en plus importante dans la vie des apprenants. Cet article se penche sur l’emploi de la technique de la capture vidéo écran comme moyen d’explorer les processus de composition et de reformulation d’apprenants en environnements numériques. Il souligne les aperçus rendus possibles par cette méthode de recherche et l’apport de ces connaissances pour faire valoir la diversité des stratégies, ressources et actions déployées par des apprenants lors de la rédaction de textes avec des appareils électroniques. Les conclusions explorent les applications pédagogiques de ces observations qui, lorsqu’elles sont triangulées avec d’autres sources de données, permettent une compréhension plus approfondie des défis et complexités auxquels les apprenants font face lorsqu’ils composent et reformulent leurs textes et la pertinence d’inscrire de manière plus explicite ces processus dans la conception d’une pédagogie de l’écrit et de la reformulation.
Interactions sociotechniques de filière et fonctions des systèmes d’innovation responsable : une mise en perspective à partir d’enjeux de transition des filières agricoles
Authors: Magrini Marie-Benoît
Published: February 2023

Les concepts de système d’innovation responsable ou d’innovation couplée mettent l’accent sur les interactions sociotechniques entre acteurs pour construire une vision commune des enjeux et les ressources nécessaires aux changements visés. Or, peu de travaux s’intéressent à la structuration de ces interactions à l’échelle des filières. La littérature sur les filières repose essentiellement sur une vision comptable ou logistique des flux matériels et financiers sans analyser les impacts des interactions entre opérateurs sur les processus de changement. Croisant la littérature économique sur les modes de gouvernance des transactions, les systèmes d’innovation et les transition studies , cet article analyse comment les interactions sociotechniques de filière, dépendant des modes de gouvernance des transactions, remplissent les fonctions d’un système d’innovation responsable ; et contribuent à définir la capacité de transition d’une filière. Cette réflexion s’appuie sur le contexte de différentes filières agricoles en France engagées vers la durabilité. Codes JEL : L14, L24, L2, O13, O3, Q1
A multi-parameter family of metrics on stiefel manifolds and applications
Authors: Schlarb Markus
Published: February 2023

The real (compact) Stiefel manifold realized as set of orthonormal frames is considered as a pseudo-Riemannian submanifold of an open subset of a vector space equipped with a multi-parameter family of pseudo-Riemannian metrics. This family contains several well-known metrics from the literature. Explicit matrix-type formulas for various differential geometric quantities are derived. The orthogonal projections onto tangent spaces are determined. Moreover, by computing the metric spray, the geodesic equation as an explicit second order matrix valued ODE is obtained. In addition, for a multi-parameter subfamily, explicit matrix-type formulas for pseudo-Riemannian gradients and pseudo-Riemannian Hessians are derived. Furthermore, an explicit expression for the second fundamental form and an explicit formula for the Levi-Civita covariant derivative are obtained. Detailed proofs are included.
Some results in function weighted b-metric spaces
Authors: Nurwahyu Budi , Aris Naimah , Firman
Published: February 2023

In this paper, we introduce F-b-metric space (function weighted b-metric space) as a generalization of the F-metric space (the function weighted metric space). We also propose and prove some topological properties of the F-b-metric space, the theorems of fixed point and the common fixed point for the generalized expansive mappings, and an application on dynamic programing.
Global well-posedness and asymptotic behavior of $ BV $ solutions to a system of balance laws arising in traffic flow
Authors: Li Tong , Mathur Nitesh
Published: February 2023

We establish global well-posedness and asymptotic behavior of $ BV $ solutions to a system of balance laws modeling traffic flow with nonconcave fundamental diagram. We prove the results by finding a convex entropy-entropy flux pair and verifying the Kawashima condition, the sub-characteristic condition, and the partial dissipative inequality in the framework of Dafermos. This problem is of specific interest since nonconcave fundamental diagrams arise naturally in traffic flow.
L’America di Leone Mucci. Socialismo e difesa della «gente inferiore»
Authors: Presutto Michele
Published: February 2023

L’articolo ricostruisce, all’interno del suo percorso biografico, l’attivismo di Leone Mucci in favore degli emigranti italiani e la sua integrazione negli ambienti della sinistra italiana negli Stati Uniti degli inizi del Novecento. Leone Mucci, avvocato socialista legato alla Capitanata, tra il 1908 e il 1913 visse nell’area di Boston prendendo attivamente parte alle vicende legate all’emigrazione italiana in quegli anni, in particolare il suo coinvolgimento nel caso Caruso-Ettor-Giovannitti. La figura di Mucci continuerà ad avere un ruolo importante anche al rientro in Italia, quando si occuperà delle diverse problematiche relative agli italiani d’America: dal caso Sacco e Vanzetti, al contrasto alle politiche restrittive americane in tema d’immigrazione, fino al diritto di voto per gli italiani all’estero. Un attivismo politico che continuerà anche quando diverrà deputato nel parlamento di Roma, in una traiettoria che si proietta ben al di là dell’ambito nazionale, assumendo un respiro decisamente transazionale.
Einstein et l’article incompris de 1911
Authors: Spagnou Pierre
Published: February 2023

Cet article d’Einstein publié en 1911 reste l’un de ses travaux les plus cités et constitue aujourd’hui la référence pour les physiciens quand il s’agit de présenter une dérivation simple du décalage spectral gravitationnel, appelé couramment « effet Einstein ». Cet article possède une importance historique et pédagogique considérable, notamment parce que les physiciens continuent majoritairement à l’interpréter incorrectement, ce qui les conduit à ignorer l’origine purement relativiste de l’effet. Contrairement à l’article d’Einstein de 1907 « Du principe de relativité et des conséquences tirées de celui-ci » où il proposait une dérivation du décalage spectral gravitationnel proche de la version moderne, l’article de 1911 est beaucoup plus ambigu pour un non-spécialiste et peut conduire aisément à des contresens.
Newton a-t-il pu dériver l’accélération de Coriolis ?
Authors: Persson Anders
Published: February 2023

Reconstitution possible d’une dérivation des (futures) « forces de Coriolis » dans les Principia de Newton, à partir de l’approche totalement géométrique de celui-ci, via notamment la loi des aires.
La découverte de la radioactivité artificielle
Authors: Radvanyi Pierre
Published: February 2023

Dans sa conférence Nobel de décembre 1935, Joliot revient sur la découverte de la radioactivité artificielle (mise en évidence de l’isotope radioactif du phosphore : ainsi, il n’y avait pas que les éléments lourds susceptibles d’être radioactifs), accompagnée par la découverte de la radioactivité ϐ+ (émission d’un électron positif par l’élément radioactif non naturel). Joliot a aussi dans son discours Nobel l’intuition des réactions en chaîne qui sera vérifiée quelques années plus tard. Comme les rayons X, la radioactivité artificielle eut immédiatement des applications médicales. Les traceurs radioactifs, faits à partir d’éléments radioactifs de faible durée de vie (donc préparés à l’hôpital), se fixent sur des organes à étudier et émettent un rayonnement gamma (annihilation d’un électron et d’un positon) capté par le scintigraphe.
Faculty Perceptions of How Their Altruistic and Servant Teaching Behaviors Influence Student Learning
Authors: Krise Robert
Published: February 2023

The purpose of this qualitative exploratory case study was to explore how faculty teaching social sciences in a post-secondary online modality judge or perceive the influence of their altruistic and servant teaching behaviors on student learning. This study analyzed altruism and servant teaching theories and used a qualitative case study method. The study was completed at a four-year university and included participants who had at least three years of online teaching experience. Three research questions framed this study, asking how online social science faculty judge the influence of instructor altruistic and/or servant teaching behaviors on student learning. The study used three instruments to collect data, a questionnaire, one-on-one interviews, and focus group discussions. The coding process identified five themes, which were rapport, barriers, values, success, and response. From these themes, the data was found to be consistent with previous literature, showing that these behaviors can be influential in student learning.
Effect of Titanium Dioxide Nanoparticles on the Properties of Poly(Vinyl Alcohol)/Silica Hybrid Films Prepared by the Sol-Gel Method
Authors: Mahdi Billal , Rouabah Farid
Published: February 2023

This work is focused on the preparation and characterization of poly (vinyl alcohol)/silica gel/Nano-TiO2, and the study of titanium dioxide (TiO2) nanoparticles (from 1 to 5%) on the properties of poly (vinyl alcohol) (PVA)/silica films. This new material was prepared by the sol-gel method using poly (vinyl alcohol) powder with Tetraethyl Orthosilicate (TEOS) as a precursor source of silica. TEOS was hydrolyzed and condensed in water and ethanol in the presence of hydrochloric acid (HCl) used as a catalyst. Fourier transform infrared (FT-IR), water absorption, water contact angle, ultraviolet-visible spectrometry (UV-VIS), and thermogravimetric analysis (TGA) were used to characterize the hybrid films obtained. The PVA/SiO2/Nano-TiO2 films were successfully synthesized. Owing to the FT-IR Analysis, the chemical bonds have clearly shown that the PVA backbone is linked to the (SiO2-TiO2) network. UV-VIS tests indicated that the hybrid films' UV shielding properties were drastically enhanced as a result of the addition of TiO2. According to the TGA tests, the hybrid films are more heat tolerant than neat PVA films. The water contact angle results revealed that TiO2 nanoparticles used as a doping compound possess an important influence on the hydrophilicity of PVA/SiO2 as thin films. The film's water resistance has also been enhanced.
When benign leiomyomas metastasize to the lungs - a case report
Authors: Vieira Naia Joana , Pimenta Diana , Paiva Anita , Costa Rita , Souto de Moura Conceição , Pereira Raquel , Cruz João Filipe
Published: February 2023

Benign metastasizing leiomyoma is a rare disease occurring mainly in premenopausal women with a history of uterine leiomyoma, which is most commonly characterized by pulmonary metastases. The pathogenesis of this condition is poorly understood. Usually patients are asymptomatic or present unspecific symptoms. Pathological examination combined with immunohistochemistry is essential for the diagnosis. Treatment depends on the age, hormonal status, symptoms and extent of the lesions, with surgical resection being the most effective treatment. We report the case of a 72-year-old woman with a history of total hysterectomy due to myomas 30 years earlier that presented persistent dry cough. Her chest computed tomography revealed multiple small nodules in the pulmonary parenchyma. Given the small dimensions and difficult accessibility of the nodules, surgical biopsy was made for histopathological examination and immunohistochemical staining, which were compatible with metastasizing leiomyoma. Treatment with letrozole was initiated and well tolerated.
Long-term prognosis of out-of-hospital cardiac arrest due to idiopathic ventricular arrhythmias
Authors: Alves Pinto Ricardo , Proença Tânia , Martins Carvalho Miguel , Oliveira Sílvia , Adão Luís , Macedo Filipe
Published: February 2023

Life-threatening ventricular arrhythmias (VA) may occur in patients with unknown cardiac disease. A sizable part of them remains labeled as Idiopathic VA and limited data is available regarding their natural history. Our aim was to evaluate the long-term clinical outcomes of survivors of an idiopathic life-threatening VA. Patients who survived an idiopathic life-threatening VA referred to an ICD were included and followed for a median follow-up of 7 years. Clinical and device data were collected and a comparison between genders was made. A total of 29 patients, 41% female, mean age of 50 (19) years were studied; all were implanted with an ICD at index hospitalization. At follow-up, an etiological diagnosis was established in 38% of patients. Genetic testing improved the diagnosis and allowed the identification of a distinct clinical entity in 60% of patients (p=0.04, OR = 7.0), especially in women. Regarding ICD data, 31% received appropriate therapies with a median time to first appropriate shock of 39 months (IQR 12-46 months). Men had a significantly higher prevalence of appropriated shocks (50% vs 8%, p=0.04), with a similar time to the first arrhythmic event between genders. Two of the patients died, both from non-arrhythmic causes. Etiologic diagnosis and recurrence prediction in patients with idiopathic VA is challenging, even with long-term follow-up and sophisticated diagnostic evaluation.  Genetic testing significantly improved the diagnostic yield, especially in women. Arrhythmia recurrence occurred in about one-third of patients and is significantly higher in men, underscoring the importance of ICD implantation.
African Indigenous knowledge versus Western science in the Mbeere Mission of Kenya
Authors: Gathogo Julius M.
Published: February 2023

This article sets out to explore the way in which Western science and technology was received in the Mbeere Mission of central Kenya since August 1912 when a medical missionary, Dr T.W.W. Crawford, visited the area. In his dalliance with ecclesiastical matters, Crawford, a highly trained Canadian medical doctor, was sent by the Church Missionary Society (CMS) at Kigari-Embu, in 1910, to pioneer the Anglican mission in the vast area that included Mbeereland, where Mbeere Mission is situated. Contending with the African indigenous knowledge in medicine, environmental conservation, agriculture and other forms of indigenous science, the introduction of Western science and technology, 1912 to 1952, the article argues, did not erase the former; rather, it complimented it. Pockets of general resistance were evident, though Mbeereland, unlike its neighbouring Mutira Mission of 1912, did not offer elaborate opposition to the Western science and technology, partly because the locals could have learnt about it from their neighbours who had experienced it much earlier. Through a historico-narrative design, the research article endeavours to primarily review the coming of Western medicine in Mbeereland: Did it conflict with the African medicine? Methodologically, the data have been collected via archival sources, oral interviews and by reviewing applicable literature.Contribution: The input of this research article to the HTS Journal’s vision and scope is seen by appreciating its focus on the interface between African indigenous knowledge and the European science and technology. Although the main focus is
Factors influencing electronic human resource management implementation in public organisations in an emerging economy: An empirical study
Authors: Amoako Richard , Jiang Yuanchun , Adu-Yeboah Stephen S. , Frempong Michelle F. , Tetteh Stephen
Published: February 2023

Purpose: Governments in developing countries are riddled with operational inefficiencies. Many have turned to electronic service delivery to address these operational problems. With coronavirus disease 2019 (COVID-19) pandemic, the push for digitalisation has only got stronger. We use the technology acceptance model (TAM) and innovation diffusion model (IDM) to investigate the factors that influence the implementation of electronic human resource management (e-HRM) in selected public organisations in an emerging economy.Design/methodology/approach: Data were collected from key informants composed of human resource (HR) officers, supervisors, line managers and sections of employees in selected public sector organisations. The data were analysed using hierarchical regression techniques.Findings/results: The various dimensions of TAM and IDM were found to contribute to the implementation of e-HRM in public organisations significantly. Specifically, perceived simplicity of usage, perceived usefulness, self-efficacy, compatibility and facilitating conditions showed significant positive effects on e-HRM implementation intentions. Furthermore, compatibility and perceived ease of use significantly predicted perceived usefulness of e-HRM.Practical implications: The influence of the dimensions of TAM and IDM in e-HRM implementation intentions in public institutions in this study dictates that governments in developing nations need to pay attention to both technology features and employee’s technology capabilities to ensure smooth digitalisation of government business.Originality/value: The integration of TAM and IDM in assessing e-HRM implementation in a developing nation enriches e-government and HR management literature.
Examining staff burnout during the transition to teaching online due to COVID-19 implications
Authors: Fynn Angelo , Van der Walt Hugo D.
Published: February 2023

Orientation: COVID-19 generated the need for changes in the higher education sector, sparking a shift to online approaches ultimately increasing workload. This study assessed the prevalence of burnout symptoms among academics at an online university in South Africa.Research purpose: Assessing prevalence and severity of burnout symptoms among academics and its impact on work engagement.Motivation for research: Academics are central to the teaching and learning processes at higher education institutions. Health and wellness has an impact on institutional functionality. As academic workloads increase, so does the likelihood of burnout, which can influence academic functioning.Research approach/design and method: Cross-sectional design.Main Findings: High levels of burnout within open, distance and e-learning (ODeL) academic staff member population is evident with 75% of staff experiencing high or very high burnout. High levels of burnout were concentrated among senior lecturers, with teaching experience and have at least a PhD. The regression coefficient for work engagement (B = –0.364, p ≤ 0.001) indicated that for each point increase in work engagement, there was a decrease in burnout of 0.364.Practical implications: High levels of burnout include job dissatisfaction, reduced quality of work, and increased absenteeism. Addressing burnout contributes to retaining experienced staff, improved job satisfaction and quality output. This paper highlights the impact of teaching transitions on the academic workforce, contributing towards wellness interventions aiding burnout recovery.Contribution/value-add: This paper highlights the impact of teaching transitions on the academic workforce within South Africa, contributing towards wellness interventions aiding the recovery from burnout.
Searching for meaning in a disruptive world – Constructing a lexicon of the meanings of meaning
Authors: De Klerk Jeremias J.
Published: February 2023

Orientation: Meaning is not a concept whose significance needs to be debated anymore. Rather, the meaning of meaning is a concept that needs more clarity to improve its understanding.Research purpose: In this paper, the construct of meaning is deconstructed to develop a lexicon of the respective meanings of meaning, especially as they apply to the domain of work.Motivation for the study: Descriptions of the various meanings of meaning tend to be lost across many different journal articles and books. More clarity regarding the meanings of meaning and how they compare and relate with each other is essential to promote valid research and influential practice in this field.Research approach/design and method: Theoretical research is conducted through a literature study and the meanings of meaning are determined through theory synthesis and topical analyses.Main findings: Meaning is a multidimensional construct, especially as it applies to the work context. The concept of meaning in life is distinct and should be distinguished from related concepts, such as the meaning of work, meaning at work, meaning in work, and meaningful work.Practical/managerial implications: By clarifying meanings of meaning, the lexicon provides a unique reference work for scholars, and an essential guide for practitioners in the fields of psychology, industrial and organisational psychology, and even psychiatry, who aspire to advance and promote meaningfulness in their work contexts.Contribution/value-add: As far as could be established, this is the first lexicon of the meanings of meaning in one easy-to-use compendium, for accurate comparison and reference.
In silico docking analysis of beta-defensin 20 against cation channel sperm-associated protein 1–4 to predict its role in the sperm maturation
Authors: Yunaini Luluk , Erlina Linda , Fadilah Fadilah , Pujianto Dwi Ari
Published: February 2023

Beta-defensin 20 (DEFB20) is widely expressed in the epididymis with gene features involved in epididymal sperm maturation. However, the action mechanism and function of DEFB20 in sperm maturation are still unclear. One of the important roles of beta-defensin is the ion channel activity. The cation channel sperm-associated protein (CatSper) alpha is an ion channel protein found on the sperm surface. This study aimed to investigate the interaction between DEFB20 and CatSper1–4 protein in relation to the sperm maturation process. Protein sequences were obtained from the National Center for Biotechnology Information (NCBI). Protein modeling and validation were carried out by using the Robetta modeling server and the Ramachandran plot method. Rosetta web server was used for the docking analysis. The results revealed a natural interaction between DEFB20 and CatSper1–4. The interaction occurred at the cation channel (close to the casein kinase II), ion transport protein, and kinase c phosphorylation of the CatSper1–4 active site. The DEFB20 region interacting with CatSper2–4 was the beta-defensin domain, while with CatSper1 was the non-beta-defensin domain. Based on the analysis, DEFB20 may interact with CatSper α subunits, particularly CatsSper1, to affect ion channel activity during sperm maturation.
A Case of Bacteremia by Achromobacter xylosoxidans in an Immunocompromised Host and Review of Literature
Authors: Rajni Ekadashi , Kataria Shaveta , Sarna Mukesh Kumar , Garg Vishnu Kumar
Published: February 2023

Achromobacter
xylosoxidans is an uncommon nosocomial pathogen known to cause serious infections in immunocompromised patients. Long stays in critical care units often predispose to infection with this bacterium. A female patient, who is a known case of diabetes mellitus type 2, hypertension, and chronic kidney disease, presented to the emergency department with complaints of shortness of breath, generalized swelling, decreased urine output for 7 days, and altered sensorium for 1 day. A. xylosoxidans was isolated from paired blood culture. She was managed according to the antibiotic susceptibility report and was improving when she left against medical advice due to personal issues. The objective of presenting this case report is to stress upon the importance of communication between the microbiologist and the clinician. Embracing automation in microbiology laboratories is essential to identify such novel bacterium in time to achieve clinical and microbiological cures.
Prevalence and Clinical Profile of Maturity Onset Diabetes of the Young among People with Diabetes Attending a Tertiary Care Centre
Authors: Bhat Javaid Ahmad , Bhat Moomin Hussain , Masoodi Shariq Rashid , Ahmad Hilal , Ahmad Peerzada Ovais , Wangnoo Bisma Rashid , Bashir Mir Iftikhar , Wani Arshad Iqbal , Misgar Raiz Ahmad , Rashid Imtiyaz , Ganai Bashir Ahmad , Nissar Kamran , Shah Zafar Amin
Published: February 2023

Background:

Maturity onset diabetes of young (MODY) is considered to be the most underdiagnosed condition. The correct diagnosis of MODY has a definite bearing on the outcome and clinical course of the disease. We aim to determine the prevalence and clinical profile of MODY among young diabetic patients attending at Department of Endocrinology, a tertiary care institute in North India.

Methods:

It was a cross-sectional study involving all consecutive consenting patients with diabetes and age of onset ≤35 years. A total of 1,094 patients were included in this study, of whom 858 were having age of onset of diabetes <25 years. All patients were screened for MODY using clinical criteria and MODY Probability calculator (available on diabetesgenes.org). Patients with high clinical probability of MODY having negative anti-GAD65 antibody and fasting serum C-peptide levels >0.6 ng/mL were subjected to the Ala98 Val polymorphism (SNP) in hepatocyte nuclear factor (HNF) 1a gene.

Results:

The prevalence of MODY among the study cohort as per clinical criteria was found to be 7.7%. Males constituted the majority of patients (male vs female, 56% vs. 44%; P < 0.001). The patients with MODY were younger (p < 0.001), leaner (p < 0.001), had younger age at onset of diabetes mellitus (p < 0.001), and lower frequency of features of insulin resistance in the form of skin tags and acanthosis nigricans. Among the 40 patients who were subjected to Ala98Val polymorphism of HNF1α gene (MODY 3), the mutant genotype was seen in 20 (50%) patients.

Conclusion:

We report a higher prevalence of MODY in our young diabetic patients. A high index of suspicion is required to diagnose MODY as misdiagnosis and inappropriate treatment may have a significant impact on quality-of-life (QOL) with increased cost and unnecessary treatment with insulin.
Evaluation of fresh demineralized dentin graft with or without concentrated growth factor in guided bone regeneration around dental implant
Authors: El-Ghaysh Ahmed Mohamed , Al-Hessy Amal A. , El-Razzak Mona Y. Abd
Published: February 2023

Objectives

The aim of this study was to evaluate clinically and radiographically, the effectiveness of autologous demineralized dentin graft with or without concentrated growth factor (CGF) around immediate-delayed implant in type II sockets in patients with advanced chronic periodontitis.

Materials and methods

In the present study, 16 sites with periodontally hopeless single rooted teeth in nine patients. Sites were divided randomly into: group I, which was treated with autologous demineralized dentin graft, and group II was treated with autologous demineralized dentin graft with CGF. At time of crown placement after 6, 9- and 12-months probing pocket depth and bleeding on probing around implant were assessed. Radiographically, facial bone thickness (FBT) and bone density were estimated by using standardized cone beam computed tomography after tooth extraction, immediately after surgery, nine and twelve months later.

Results

Regarding clinical parameters, both groups showed nonsignificant differences after 6, 9, and 12 months as compared to baseline measures. Upon comparing the groups in terms of pocket depth and bleeding on probing, also showed nonsignificant difference at all study evaluation periods. Radiographic analysis by cone beam computed tomography showed a significant reduction in FBT in two groups at 9 and 12 months as compared to thickness immediately after implant placement. On the other hand, there was a nonstatistically significant difference in FBT between both groups. Regarding bone density, the results showed significant increase in bone density in two groups without significant difference between both groups however, more density was observed in group II.

Conclusion

The combined treatment of CGF with autologous demineralized dentin graft showed better results, however nonsignificant difference was noted radiographically when compared with autologous demineralized dentin graft alone, it was therefore postulated that, the addition of CGF to autologous demineralized dentin graft may have been a promising outcomed in the field of periodontal regeneration.
Minimally invasive approach in treatment of ameloblastoma in adolescent
Authors: Beder Rafic R. , Ibrahim Marwa T.
Published: February 2023

Background

Treatment of ameloblastoma in young patients should be conservative to avoid serious complications resulting from radical surgery. The aim of this study was to evaluate the prognosis of surgical excision with thorough curettage (peripheral ostectomy) in treatment of ameloblastoma in adolescent.

Patients and methods

This study included eight patients with mandibular ameloblastoma, which was confirmed by preoperative computed tomography and histopathological examination of incisional biopsy specimen and all patients were treated by surgical excision with thorough curettage.

Results

This study involved six males and two females, with an age ranged from 12 to 16 years with a mean of age 13.75 years. All lesions occurred in the mandible. Recurrence was not observed in seven cases of eight cases after 36 months follow up and occurred only in case no 7.

Conclusion

Ameloblastoma in adolescents can be successfully treated conservatively by surgical excision with thorough curettage (peripheral ostectomy).
Clinical efficacy of aloe vera, nanosilver, and chlorhexidine in the treatment of plaque-induced gingivitis
Authors: El Din Sherouk M. Mohamed Gama , Sabry Marwa M. , Elgendy Ahmed M.A.
Published: February 2023

Aim

To evaluate the effect of aloe vera versus nanosilver (NS) mouthwashes in comparison with chlorhexidine on plaque-induced gingivitis.

Patients and methods

Sixty patients with plaque-induced gingivitis were assigned to three groups and asked to rinse with 10 ml of aloe vera, NS or chlorhexidine, immediately after brushing for 1 min. The plaque, gingival, and papilla bleeding indices were taken at baseline, 2 weeks, and after 4 weeks.

Results

There were statistically significant differences in all investigated parameters after 2 and 4 weeks as compared to the baseline in all groups. While there were no significant differences between the groups during any evaluation period. Aloe vera and NS mouthwashes showed no side effects.

Conclusion

The results indicated that aloe vera and NS mouthwashes can be used as effective mouthwashes without any side effects.
Risk of tuberculosis in children with rheumatologic diseases treated with biological agents: A cross-sectional cohort study
Authors: Bayram Nuri , Altuğ Gücenmez Özge , Makay Balahan , Kıymet Elif , Böncüoğlu Elif , Şahinkaya Şahika , Sorguç Yelda , Akaslan Kara Aybüke , Ötiken Arıkan Kamile , Devrim İlker
Published: February 2023

Objectives: This study aimed to evaluate the risk of tuberculosis (TB) disease in children receiving biological agents for rheumatologic diseases, focusing on appropriate screening tests in a high-priority country for TB control.

Patients and methods: One hundred nine children (56 females, 53 males; range, 3.4 to 16.2 years) who received any biological agent for rheumatologic diseases for more than two years between May 2012 and October 2021 were included in this retrospective study. Patients were screened for TB infection using tuberculin skin test (TST) or interferon-gamma release assay (IGRA). Following the initial evaluation, patients were clinically examined for TB every three months by a comprehensive medical history and physical examination, and every 12 months using TST or IGRA.

Results: At the initiation of the biological agent, the patients’ mean age was 12.4±4.5 years. The average follow-up duration was 3.6±1.3 years (range, 2.6 to 10.2 years) for patients treated with biological agents. Each patient had a documented Bacillus Calmette-Guérin vaccination. Before the initiating of therapy, TST was performed alone in 45 (41.3%) patients and in combination with IGRA in 64 (58.7%) patients. In the 64 patients who underwent both TST and IGRA, IGRA revealed nine (14.1%) positive results. Six (66.7%) of these nine patients, however, had negative baseline TST. Four (7.3%) of the 55 individuals whose initial IGRA results were negative also had positive TST results. Overall, no TB disease was observed after a follow-up period.

Conclusion: This study reveals that biological agents were not associated with an increased risk of TB disease in closely monitored children. Additionally, the concomitant use of TST and IGRA for screening of TB is reasonable in patients receiving biological agents.