bluuebunny/crossref_metadata_2025 huggingface dataset:
Pour une géographie du phénomène paroissial
Authors: Viader Roland
Published: August 2022

Résumé : La géographie des territoires paroissiaux conduite dans les années 1940 et 1950 à partir du maillage des communes s’inscrivait dans le prolongement des recherches sur la formation des paysages, et peut sembler largement dépassée aujourd’hui par des recherches plus soucieuses de la genèse des paroisses et de la construction institutionnelle de leurs territoires. En s’appuyant sur une géographie des clochers enregistrés sur la carte de Cassini et sur les premiers résultats d’une enquête portant sur les pouillés de 42 diocèses du Sud-Ouest de la France, cet article essaie de montrer que la cohérence de leurs variations régionales mériterait sans doute d’être réexaminée à la lueur des connaissances acquises depuis trente ans sur la genèse des réseaux paroissiaux.
Cartographier les territoires paroissiaux dans le Sud-Ouest de la France (Moyen Âge, époque moderne)
Authors: Hautefeuille Florent
Published: August 2022

Résumé : L’objet de cet article est de montrer par quels moyens et avec quelle précision il est possible de reconstituer la trame cartographique des paroisses prérévolutionnaires, en s’appuyant sur les données d’époque moderne, essentiellement les registres paroissiaux, les sources fiscales, l’« État des Villes » de la carte de Cassini et lorsqu’elle existe, la carte de Belleyme. L’entreprise, en cours, permet de disposer d’une cartographie sous SIG d’environ 8 100 paroisses sur une dizaine de diocèses, avec une précision à l’échelle du lieu-dit. Ce travail de reconstitution a permis de montrer la complexité territoriale d’entités qui ne correspondent souvent ni aux communes actuelles, ni aux communautés d’Ancien Régime. Les premiers résultats font également apparaître des modèles distincts à l’échelle du Sud-Ouest, aussi bien pour ce qui est de la surface des paroisses que de la complexité de leur découpage.
Les biens ecclésiastiques en ville
Authors: Xandry Catherine
Published: August 2022

Résumé : De nombreux travaux et sources permettent de visualiser les biens des communautés religieuses à l’intérieur de Strasbourg à diverses périodes. Cet article se propose d’utiliser les outils de la géomatique pour présenter un essai de cartographie des biens des communautés strasbourgeoises du Moyen Âge à l’Époque moderne, en s’interrogeant sur la façon de mettre en relation ces différentes sources, sur la méthodologie et sur les problèmes à résoudre afin de localiser ces biens et donc de cartographier ces données.
Direct Transfer Manufacturing of Flexible Silicon Carbide Nanowire-Network Prototype Device
Authors: Onder M. Samil , Teker Kasif
Published: August 2022

Flexible and transparent devices are expected to meet increasing consumer demands for upgrades in wearable devices, smart electronic and photonic applications. In this work, nano-manufacturing of a flexible and powerless silicon carbide nanowire network ultraviolet photodetector (SiCNW-network UVPD) prototype was investigated by a very cost-effective direct transfer method. Indeed, the powerless device exhibited a photo-to-dark current ratio (PDCR) of 15 with a responsivity of 5.92 mA/W at 254 nm wavelength exposure. The reliability and durability of the device was evaluated by bending tests. In fact, the PDCR of the device was still very good even after seventy-five bending cycles (~ 96 % of the rest state). In brief, our flexible, powerless SiCNW-network UVPD device with cost-effectiveness, good performance, and durability can provide feasible alternatives for new generation wearable optoelectronic products.
A Comparative Study on Corrosion Rate of Carbon Steel in NaCl Solution with Continuous and Discontinuous Weight Loss Methods
Authors: Ali Nurdin , Mustapa Mohammad Sukri , Vega Zuhdi Iskandar , Sulaiman Thalib , Hasanuddin Iskandar
Published: August 2022

A well-known corrosion parameter is corrosion rate as measured by the electrochemical or the weight-loss methods. The weight loss methods can be measured continuously or intermittently depending on the actual conditions of sample placement and the experimental design. But what distinguishes the measurement method is whether they produce the same corrosion rate value or not. This study aims to study the corrosion rate with a continuous and discontinuous measurement method of weight loss using carbon steel specimens immersed in sodium chloride solution and further compare the two results. For this purpose, 25 sample coupons with the size of 80x23x3.6 mm have been prepared. The measurement of weight loss was carried out on specimens for 10, 20, 30, 40, and 50 days, by immersing the sample in 2 and 3%-wt NaCl, respectively, and one was treated in distilled water according to ASTM G31-72. From the three treatments studied, a percentage of the results was a value that lies between 2.67 and 5.46% with an average value of 4.17%. There is no significantly effect of the data collection method for the three types of the treatment samples immersed for 10 to 50 days in distilled water, 2 and 3%-wt sodium chloride solution.
The Conductivity of the Oceans. Analysis Based on the Seismic Energy Theory
Authors: Ramírez Claudio Valverde , Romero Yulisa Valverde , Romero Milton Valverde
Published: August 2022

This research is based on the Seismic Energy Theory. In this theory a seismic event depends on the internal energy, the external energy, the climate and the type of soil. Additionally, it mentions that the intensity of a seismic event depends on the external energy accumulation, and the accumulation is variable. The Sun emits energy in a constant quantity but a variable quantity reaches the surface of the earth, and it is due to the solar photons in the path will find simple or compound bodies that can be: conductors, insulators or semiconductors. Among the best known conductors, salty water stands out. To sum up, analyzing the oceanic mass as energy conductor, we will be able to understand some of the natural events that occur in the hydrosphere.
GMR Biosensor Based on Spin-Valve Thin Films for Green-Synthesized Magnetite (Fe3O4) Nanoparticles Label Detection
Authors: Mabarroh Ni’matil , Alfansuri Taufikuddin , Istiqomah Nurul Imani , Tumbelaka Rivaldo Marsel , Suharyadi Edi
Published: August 2022

The giant magnetoresistance (GMR) thin film with spin valve (SV) structure of Ta (2 nm)/Ir20Mn80(10 nm)/Co90Fe10(3 nm)/Cu (2.2 nm)/Co84Fe10B4(10 nm)/Ta (5 nm)] fabricated by RF magnetron sputtering method with a magnetoresistance (MR) of 6% was used in this work. Green synthesis of Fe3O4 magnetic nanoparticles (MNPs) using Moringa Oleifera (MO) leaf extract have been successfully conducted using the coprecipitation method. Fe3O4 MNPs demonstrated the inverse cubic spinel structure with the average crystallite size of 13.8 nm and decreased to 11.8 nm for Fe3O4/PEG. Fe3O4, as a magnetic label, integrated with a Wheatstone bridge-GMR sensor provides access to GMR-based biosensors. The induced-field increase leads the signal (ΔV) to increase with increasing nanoparticle concentration. It was discovered that a sensor can distinguish different types of magnetic labels. The sensitivity for Fe3O4 and MO-green synthesized Fe3O4 magnetic label was 0.04 and 0.1 mV/g/L, respectively. The GMR sensor performed the highest sensitivity on the MO-green synthesized Fe3O4 label. Thus, the SV thin film as a sensor and the green-synthesized Fe3O4 nanoparticles as a superior magnetic label are an excellent combination for biosensor application.
Undertaking Deep-Sea Mining: A Quest for the Right Answers
Authors: Sharma Rahul
Published: August 2022

Abstract Humankind is at a crossroads of sorts with respect to the abundantly available deep-sea mineral resources that can serve as a potential alternative to the requirement of certain materials critical for industrial as well as domestic consumption. While on one hand,
these minerals are essential to transition to green energy alternatives, on the other hand, there remains the question of the likely environmental, social, and cultural implications. This commentary poses questions that need to be answered in order to see whether deep-sea mining is a feasible
option.
Wide-Area Three-Dimensional Imaging of Mesophotic Coral Reefs Using a Low-Cost AUV
Authors: Noguchi Yukiyasu , Humblet Marc , Furushima Yasuo , Ito Shohei , Maki Toshihiro
Published: August 2022

Abstract Surveys and monitoring are essential to study the biology and ecology of coral reefs in order to understand the reasons behind reef demise and recovery. However, mesophotic coral ecosystems (MCEs) remain largely unknown compared to their shallow counterparts because
it is difficult to observe the seafloor below 30 m depths. Here, we propose a seafloor observation method using a low-cost autonomous underwater vehicle (AUV). This method was developed to allow many people to easily perform underwater observations of MCEs, and is also applicable to general
seafloor surveys, such as underwater artificial structures, hydrothermal vent fields, etc. The method possesses three important attributes to achieve effective surveys. First, it can be applied in highly rugged terrains and enables the AUV to track omnidirectional surfaces at high speed (Max.
~1 m/s). Second, it can produce a reliable three-dimensional (3D) image of the seafloor based on a depth sensor. Third, it can be used to estimate the flow velocity field. The proposed method was tested by using the AUV HATTORI-2, which is a lightweight, one-man portable AUV equipped
with commercial off-the-shelf sensors. Our study area is the Sekisei Lagoon in the South Ryukyus, which represents the largest coral reef complex in Japan. The method enabled us not only to obtain a wide and high-definition 3D image of mesophotic coral reefs that captures detailed characteristics
of marine habitats but also to acquire environmental data, such as flow velocity field and seawater temperature, spatially and temporally aligned with the 3D image.
Pattern of childhood illnesses seen before and during COVID-19 pandemic at children out-patient clinic of a tertiary health facility in Enugu, South-East Nigeria: An observational study
Authors: Ekwochi Uchenna , Ogbuka Francis  Nnamdi , Mba Sunday Gabriel
Published: August 2022

The COVID-19 pandemic is a worldwide threat. Currently, all attention is focused on defining the disease, its presentation, treatment, and prevention, with little thought given to the impact of this disease on the prevalence and pattern of other diseases that pose health challenges. This study was a retrospective and observational study of the pattern of cases presenting at the Children Out-Patient (CHOP) Clinics of Enugu State University Teaching Hospital Parklane (ESUTHP) from five months before COVID detection to five months after COVID detection (COVID era). Clinical data from the clinic register, including age, gender, and diagnosis, was retrieved and recorded in an excel sheet before being transferred to SPSS version 20 for analysis. A total of 9377 children attended CHOP Clinics (6094 in the pre-COVID-19 era and 3283 in the COVID-19 era), representing a significant decrease in total clinic attendance in the COVID-19 era. During the study period, there was a 50% reduction in the number of cases (diseases and followups) documented from children attending clinics (pre-COVID-19 era, 4596 and COVID-19 era, 2367), indicating a significant reduction in the prevalence of these cases during the COVID-19 period. The prevalence of cases seen during the COVID-19 era was significantly lower than in the pre-COVID-19 era. This observed reduction could be attributed to COVID-19 control measures implemented in the hospital during the COVID-19 era. As a result, it is recommended that these measures be maintained in order to further reduce the prevalence of these cases even after COVID-19.
Assessment of food safety knowledge, attitude, practices of food handlers and microbial contamination in foods at the canteens of a University in Pakistan
Authors: Waseem Ali Shinawar , Ahmad Mateen , Asif Memoona , Amir Rai Muhammad , Ali Ahmad
Published: August 2022

Developing nations are striving to assure food safety that rely mainly upon handling procedures. The current study focused upon the understanding level and practices of food handlers working at various canteens of University of the Punjab, Quid-i-Azam campus, Lahore. Different canteens were selected where 300 different food handlers were judged for their approach towards food safety through a closed ended questionnaire. Samples of different food products were also taken randomly for their microbiological safety evaluation. The whole data was analyzed using chi-square to assess the proportion of correct and incorrect responses among various parameters. The non-significant variation was observed among the knowledge, attitude and practices scores of university and its hostels’ canteens food handlers. Overall, 60% of the responses were correct from the university and hostel canteens food handlers. Similarly, 50-60% of the responses regarding attitude and practices were correct from the university and hostel canteen food handlers. With many technical flaws, these food handlers showed moderate level of knowledge. Not only apprentices but the supervisors too, lacked the basic knowledge of temperature as major factor creating potential food safety threats. Lack of knowledge about personal hygiene and workplace sanitation were few contributing factors towards heedless behavior. Incidence of Salmonella and Staphylococcus aureus contamination in food samples was found 29% and 57%, respectively, while 35% food samples were found contaminated with E. coli. It further exposed the negligence, emphasizing proper training of employees as part and parcel of food safety procedures. It was concluded that more training programs along with periodic validation of food manufacturing standards are required to ensure food safety. Furthermore, strict surveillance and implementation of GMPs by the administrative authorities are needed to safeguard the consumers’ health.
Occurrence of drug-resistant enteric bacteria and associated factors among food handlers of the Mass Catering Center: A laboratory-based cross-sectional study
Authors: Yenew Chalachew , Andualem Minwuyelet , Tadele Fitalew , Mulatu Sileshi , Atikilt Getaneh , Gebeyehu Asaye Alamneh
Published: August 2022

This study aimed to determine antimicrobial- resistance (AMR) enteric bacterial load and associated factors among Food Handlers (FHs) ofMass Catering Center (MCC), Ethiopia. From January to June 2020, a laboratory-based cross-sectional study was conducted using the standard Swab microbiological analysis method and the Kirby-Bauer disc diffusion method on 160 randomly selected FHs and food serving areas and analyzed with RStudio- 1.2.5033 for contamination, resistance level, and source determination. The contamination of AMR Escherichia coli was 33.3% (95% CI, 31.5%, 36.4%), Salmonella 30% (95% CI, 29.8%, 36.0%) and Shigella 20% (95% CI, 19.2%, 26.9%) among the hand of FHs serving in MCC. The contamination was more likely associated with low work experience [AOR, 1.42 (95% CI: 1.22-1.87)], a low educational level [AOR, 1.62 (95% CI: 1.52-189)], irrational drug use characteristics [AOR, 1.75(95% CI: 1.64-2.00)], lack of sufficient food safety knowledge [AOR, 1.52 (95% CI: 1.32-1, 67)] of the FHs and the sanitary condition of the food serving area [AOR:1.98 (95% CI, 1.45, 2.53)]. The contamination of the hand of FHs serving in the MCC with AMR enteric FBB at the University cafeteria could indicate the likelihood of the occurrence of foodborne outbreaks.
CLONAL HEMATOPOIESIS: ROLE IN HEMATOLOGIC NON-HEMATOLOGIC
Authors: Testa Ugo , Castelli Germana , Pelosi Elvira
Published: August 2022

Hematopoietic stem cells (HSCs) ensure the coordinated and balanced production of all hematopoietic cell types throughout life. Aging is associated with a gradual decline of the self-renewal and regenerative potential of HSCs and with the development of clonal hematopoiesis. Clonal hematopoiesis of indeterminate potential (CHIP) is a term defining the clonal expansion of genetically variant hematopoietic cells bearing one or more gene mutations and/or structural variants (such as copy number alterations).  CHIP increases exponentially with age and is associated with cancers, including hematologic neoplasia, cardiovascular and other diseases. The presence of CHIP consistently increases the risk of hematologic malignancy, particularly in individuals who have CHIP in association with peripheral blood cytopenia.

 

Key words: hematopoiesis, hematopoietic stem cells, clonal hematopoiesis, gene mutations, next generation sequencing.
Crataegus sinaica defatted methanolic extract ameliorated monosodium iodoacetate-induced oxidative stress andinhibited inflammation in a rat model of osteoarthritis
Authors: Alsharif Ifat A. , Abd-Elsalam Reham M. , Amer Mohammed S. , El-Desoky Ahmed H. , Abdel-Rahman Rehab F.
Published: August 2022

Background and purpose

Osteoarthritis is a degenerative joint disease without definite treatment. It is characterized by intra-articular inflammation, cartilage degeneration, subchondral bone remodeling, and joint pain. The objective of the current study was to assess the anti-osteoarthritic effect and the possible underlying mechanism of action of Crataegus sinaica extract (CSE).

Experimental approach:

Intra-articular injection of monosodium iodoacetate in the right knee joint of all rats was done except for the sham group. One week later, the anti-inflammatory efficacy of CSE (100, 200, 300 mg/kg, daily p.o) for 4 successive weeks versus ibuprofen (40 mg/kg, p.o) was assessed.

Serum inflammatory cytokines; as well as weekly assessment of knee joint swelling, joint mobility, and motor coordination were done. At the end of the experiment, a histopathological investigation of the affected knee joints and an x-ray investigation were also executed.

Findings / Results:

CSE significantly decreased joint swelling, pain behaviors, and serum levels of TNF-α, IL6, hyaluronic acid, and CTX-II. The radiographic findings revealed almost normal joint space with normal radiodensity and diameter in CSE-treated rats. As well, the histopathological and immunohistochemical investigations of the knee joints in CSE-treated groups retained the cartilage structure of knee joints. A significant reduction in the percentage of caspase-3-stained chondrocytes and a decrease in TGF-β1 immuno-positive areas in the synovial lining and sub lining were recorded in CSE-treated rats, compared to the osteoarthritis control group.

Conclusion and implications:

This study approved the chondroprotective effects of CSE, and its ability to inhibit the pain associated with osteoarthritis.
Redo hepaticojejunostomy in the management of bilioenteric anastomotic strictures
Authors: Bhat Bharath Kumar , Ray Samrat , Lalwani Shailendra , Mangla Vivek , Mehta Naimish N , Yadav Amitabh , Nundy Samiran
Published: August 2022

Background:

The Roux-en-Y hepaticojejunostomy (RYHJ) is the commonly done drainage procedure for strictures which occasionally follow operations on the gallbladder and bile ducts. However, 8%–40% of these anastomoses become narrowed again and the redo operation is technically challenging. There are only a few reports which have examined the results of these revision procedures and we therefore decided to analyse our experience of this unusual operation.

Aim: To study the role of redo-hepaticojejunostomy in the management of bilio-enteric anastomotic strictures.

Materials and Methods:

Between January 2010 and January 2016, we performed 23 redo-hepaticojejunostomies for the strictures following an initial hepaticojejunostomy which was done for benign indications in our department and followed them for a minimum of 2 years with clinical, biochemical and radiological tests.

Results:

There were 7 males and 16 were females who had a median age of 37 years (range 15–63 years). The median interval between the index operation and the stricture recurrence was 10 months. Thirteen (57%) patients underwent initial surgical revision and 10 had the procedure following unsuccessful percutaneous intervention. The median length of hospital stay was 10 days and 21 (91%) only had minor complications. There was no operative mortality. On follow-up of all 23 patients after 2–8 years, six (26%) patients developed stricture recurrence, of whom three were managed with percutaneous dilatation and three required a second revisional surgery. Seventeen patients are symptom-free.

Conclusion:

Redo RYHJ is a feasible option for strictures following an initial biliary enteric anastomosis with no surgical mortality and three-quarters of the patients being rendered symptom-free.
Surgical outcomes after endoscopic retrograde cholangiopancreatography and sphincterotomy associated duodenal perforations
Authors: Bojanapu Srinivas , Vajpeyajula Uma , Das Aurobindo Prasad , Mehta Naimish , Nundy Samiran
Published: August 2022

Background:

The advent and progress of endoscopic retrograde cholangiopancreatography (ERCP) for hepato-pancreaticobiliary diseases have introduced a paradigm shift in their treatment but have also been associated with complications that have been difficult to manage. We examined the outcome of patients who had duodenal perforations from periampullary endoscopic procedures who needed surgical intervention.

Aim:

To study the outcomes in patients who underwent surgical intervention for ERCP associated duodenal perforation.

Materials and Methods:

Between January 2001 and November 2021, we retrieved the details of 20 patients who had been operated on for duodenal perforations following ERCP from a prospectively maintained database.

Results:

There were nine males and 11 females whose mean age was 51.3 (range 29–81) years. The most common indication for the endoscopic procedure was choledocholithiasis in 16, followed by biliary stricture in 3 and malignancy in 1. The median duration between the diagnosis of perforation and surgery was 8.3 days (range 0–48). The mean hospital stay was 21.5 (range 5–60) days. Four (20%) patients underwent re-exploration. Seven (35%) patients died, in all of whom the diagnosis had been missed at the time of the procedure (P = 0.015). Eighty per cent of mortality occurred in patients with a Boey score of three.

Conclusion:

ERCP-related duodenal perforations though uncommon, are dreaded complications and do not have universally accepted standard management. Patients with delayed diagnosis of duodenal perforation and higher Boey scores have higher mortality rates.
Frequency of skin diseases in Egyptian population during coronavirus disease 2019 pandemic
Authors: Mohamed Marwa , Mohammed Nesreen Ali , Saleh Ramadan
Published: August 2022

Background

Coronavirus disease 2019 (COVID-19) pandemic has resulted in remarkable changes in the profiles of diseases including dermatologic conditions.

Aim

To investigate the patterns of skin diseases in Egypt during the COVID-19 pandemic.

Patients and methods

In this cross-sectional study, we reviewed the data of patients who visited dermatology clinics between August 2020 and January 2021 and compared them with the data from the same clinics in the previous year.

Results

The total number of patients who attended the dermatology clinics between August 2020 and January 2021 was 803 as compared with 1611 patients in the corresponding period of the previous year (49.84% reduction). During the COVID-19 pandemic, there was a significant increase in the frequency of allergic contact dermatitis, irritant contact dermatitis, pityriasis rosea, alopecia areata, erythema multiforme, vasculitis, herpes zoster, and chicken pox (P<0.05). On the contrary, some dermatological conditions such as urticaria and nonscarring hair loss had significantly decreased frequencies during the COVID-19 pandemic (P<0.05). Several skin diseases had unchanged frequencies during the COVID-19 pandemic. These included skin infections (other than viral infections), bullous disorders, some eczematous skin diseases, papulosquamous disorders, and disorders of skin pigmentation.

Conclusion

This study indicates a significant reduction in the total number of patients attending dermatology clinics in Egypt during the COVID-19 pandemic. The frequency of some skin diseases increased significantly, whereas other skin diseases decreased significantly or remained unchanged during the pandemic. Periodic evaluation of the epidemiologic characteristics of skin diseases is required at different stages of evolution of the COVID-19 pandemic.
Abstract group actions of locally compact groups on CAT(0) spaces
Authors: Möller Philip , Varghese Olga
Published: August 2022

We study abstract group actions of locally compact Hausdorff groups on CAT(0) spaces. Under mild assumptions on the action we show that it is continuous or has a global fixed point. This mirrors results by Dudley and Morris–Nickolas for actions on trees. As a consequence we obtain a geometric proof for the fact that any abstract group homomorphism from a locally compact Hausdorff group into a torsion-free CAT(0) group is continuous.
Erdős–Szekeres theorem for multidimensional arrays
Authors: Bucić Matija , Sudakov Benjamin , Tran Tuan
Published: August 2022

The classical Erdős–Szekeres theorem dating back almost a hundred years states that any sequence of

(n-1)^2 + 1

distinct real numbers contains a monotone subsequence of length

n

. This theorem has been generalised to higher dimensions in a variety of ways but perhaps the most natural one was proposed by Fishburn and Graham more than 25 years ago. They defined the concept of a monotone and a lex-monotone array and asked how large an array one needs in order to be able to find a monotone or a lex-monotone subarray of size

n \times \cdots \times n

. Fishburn and Graham obtained Ackerman-type bounds in both cases. We significantly improve these results. Regardless of the dimension we obtain at most a triple exponential bound in

n

in the monotone case and a quadruple exponential one in the lex-monotone case.
Sobolev spaces revisited
Authors: Brezis Haïm , Seeger Andreas , Van Schaftingen Jean , Yung Po-Lam
Published: August 2022

We describe a recent, one-parameter family of characterizations of Sobolev and BV functions on

\mathbb{R}^n

n, using sizes of superlevel sets of suitable difference quotients. This provides an alternative point of view to the BBM formula by Bourgain, Brezis, and Mironescu, and complements in the case of BV some results of Cohen, Dahmen, Daubechies, and DeVore about the sizes of wavelet coefficients of such functions. An application towards Gagliardo–Nirenberg interpolation inequalities is then given. We also establish a related one-parameter family of formulae for the

L^p

norm of functions in

L^p(\mathbb{R}^n)

.
Gibbs measures as unique KMS equilibrium states of nonlinear Hamiltonian PDEs
Authors: Ammari Zied , Sohinger Vedran
Published: August 2022

The classical Kubo–Martin–Schwinger (KMS) condition is a fundamental property of statistical mechanics characterizing the equilibrium of infinite classical mechanical systems. It was introduced in the seventies by G. Gallavotti and E. Verboven as an alternative to the Dobrushin–Lanford–Ruelle (DLR) equation. In this article, we consider this concept in the framework of nonlinear Hamiltonian PDEs and discuss its relevance. In particular, we prove that Gibbs measures are the unique KMS equilibrium states for such systems. Our proof is based on Malliavin calculus and Gross–Sobolev spaces. The main feature of our work is the applicability of our results to the general context of white noise, abstract Wiener spaces and Gaussian probability spaces, as well as to fundamental examples of PDEs like the nonlinear Schrödinger, Hartree, and wave (Klein–Gordon) equations.
On degenerations of $\mathbb{Z}/2$-Godeaux surfaces
Authors: Dias Eduardo , Rito Carlos , Urzúa Giancarlo
Published: August 2022

We compute equations for the Coughlan’s family of Godeaux surfaces with torsion

\mathbb{Z}/2

, which we call

\mathbb{Z}/2

-Godeaux surfaces, and we show that it is (at most) 7 dimensional. We classify all non-rational KSBA degenerations

W

of

\mathbb{Z}/2

-Godeaux surfaces with one Wahl singularity, showing that

W

is birational to particular either Enriques surfaces, or

D_{2,n}

elliptic surfaces, with

n = 3, 4

or

6

. We present examples for all possibilities in the first case, and for

n = 3, 4

in the second.
Synthesis, characterization, biological activity, molecular docking and thermal analysis of binuclear complexes
Authors: Abou-Melha Khlood
Published: August 2022

ABSTRACT. Because of their potential medical applications as antimicrobial medicines, metal-ligand complexes have sparked a lot of attention. Synthesis and characterization of various metal-diamine complexes were the goals of the research detailed in this paper. As a result, synthesis of new binuclear ligand; N,N'-bis(3-carboxysalcylidene)-4-chloro-1,2-phenylenediamine (H4fsacph) which is derivative from the condensation of 3-formyl-2-hydroxybenzoic acid and 4-chlorobenzene-1,2-diamine has been performed. The new synthesized ligand has formed a mononuclear complex with Cu(II). The mononuclear Cu(II) complex was used to form binary nuclear complexes with some metal ions, like Cr(III), Mn(II), Fe(III), Ru(III), Pd(II) and La(III) ions. Elemental analysis, IR, UV-Visible, and thermal analyzes have been used to characterize the complexes. The interaction of a ligand with the receptors of Candida albicans and SARS-CoV-2 was predicted using molecular docking. Toward bacteria and fungi showing predominant activity against all fungi verified antibacterial activity of the synthesized complexes, while they have almost no activity against all bacteria. All compounds have shown antibacterial and antifungal activities, but the metal complexes showed better activities as compared to the original ligands, especially all zinc(II) complexes. The above results suggest that both ligands and their metal complexes have the potential to be explored as active pharmaceutical agents.

 

KEY WORDS: Molecular structure, Metal complexes, Molecular docking, Antimicrobial, SARS-CoV-2, Antifungal

Bull. Chem. Soc. Ethiop. 2022, 36(4), 843-858.                                                            

DOI: https://dx.doi.org/10.4314/bcse.v36i4.10
Influence des attractifs sur la production des larves de la mouche domestique (Musca domestica L. (1758)) pour l’alimentation avicole dans la zone ouest du Burkina Faso
Authors: Sankara Florence , Sankara Fernand , Pousga Salimata , Bamogo Wendpègda Jeanne Marie , Coulibaly Kalifa , Nacoulma Jacques Philippe , Somda Irénée , Kenis Marc
Published: August 2022

Les asticots constituent une source alternative de protéines animales pour pallier au problème d’alimentation auquel est confrontée l’aviculture. Cette étude, conduite au Burkina Faso avait pour objectifs de déterminer la date appropriée de récolte des asticots, d’identifier les substrats potentiels de production ainsi que les meilleurs attractifs afin d’optimiser les méthodes de production des larves de mouches domestiques pour une production avicole plus efficace et rentable. A cet effet, trois dates de récolte (4ème, 5ème et 6ème jour après exposition des substrats) ont été testées. Aussi, l’effet de cinq substrats aux états bruts et fermentés et de trois attractifs sur la production des asticots a été évalué. Les résultats ont montré que les récoltes d’asticots effectuées le 4ème jour étaient plus élevées (132,4 g/kg). La fiente de volaille constitue le meilleur substrat brut avec 112 g d’asticots frais/kg de substrat. Le sang frais est le meilleur attractif pour le son de maïs (254,3 g/kg) et le lisier de porc (199,8 g/kg). Les déchets de poisson frais constituent le meilleur attractif pour le contenu du rumen (121,5 g/kg). Les substrats peuvent être facilement améliorés à l’aide des attractifs. L’utilisation de tels résultats permet d’optimiser les méthodes de production d’asticots avec les meilleurs substrats et attractifs tout en récoltant à la bonne date.

Maggots are an alternative source of animal protein to solve the feeding problem faced by poultry farming. The objectives of this study, conducted in Burkina Faso, were to determine the appropriate date for maggot harvesting, to identify potential production substrates and the best attractants in order to optimize housefly larvae production methods for more efficient and profitable poultry production. To this end, three harvest dates (4th, 5th and 6th day after exposure of the substrates) were tested. Also, the effect of five substrates in raw and fermented states and three attractants on maggot production was evaluated. The results showed that maggot harvests on day 4 were higher (132.4 g/kg). Poultry droppings were the best raw substrate with 112 g fresh maggots / kg substrate. Fresh blood is the best attractant for corn bran (254.3 g/kg) and pig manure (199.8 g/kg). Fresh fish waste is the best attractant for rumen contents (121.5 g/kg). Substrates can easily be improved with the help of attractants. Using such results, maggot production methods can be optimized with the best substrates and attractants while harvesting at the right time.
Drought tolerance in F1 interspecific hybrid between, Solanum melongena and its wild ancestor, Solanum insanum
Authors: Kouassi Brice Aymar K. , Droh Germain , Kouassi Abou Bakari , Aka Richard Armand Kouadio , N’guetta Simon-Pierre Assanvo
Published: August 2022

The need for improved aubergine varieties is increasing because of climate change’s effects such as drought. To solve this problem, the use of wild ancestor of aubergine, Solanum insanum, as a source of genes seems appropriate since this species is found in various climates. The objective was to obtain aubergine genotypes with genes from the wild species, S. insanum, giving them the ability to adapt to drought. Drought tolerance of accessions from Solanum melongena and Solanum insanum and their F1 progeny was assessed using 16 phenotypic descriptors. Variance and genetic parameters (heritability (h2), genotypic (GCV) and phenotypic (PCV) coefficients of variation, correlations) relating to growth dynamics were estimated. F1 hybrids exhibited better drought tolerance abilities than parental accessions. The values of floral characteristics of these hybrids were higher in dry season. This favoured reproduction at expense of vegetative growth. Finally, high differences between GCV and PCV corroborated by low values of h2 show that plant selection based on growth dynamics would be ineffective for improving aubergine against drought. Development of plant organs determined by genes with pleiotropic effects is reflected by contrasting values of genotypic and phenotypic correlations.
Estimation methods for wind power potential with practical case study
Authors: Gupta Praghun , Gupta Neeraj
Published: August 2022

The potential at any location of the world for wind power must be appraised before it can be used effectively. The current state of wind resource assessment studies is provided in order to find appropriate methodologies. The Weibull distribution is a two- or three-parameter distribution function by which the wind speed's frequency distribution can be fitted properly . This set of curves has been proven to fit wind speed readings extremely well. The Maximum likelihood method, the Modified maximum likelihood method, Error of approximation, Method of Moment and the Energy pattern factor method are all offered as methods for estimating the parameters of the Weibull wind speed distribution for wind energy analysis. A sample wind speed data set is used to demonstrate the use of each method, and statistical methods of analysis are used to compare the accuracy of each method. The research aids in identifying which method is most effective in finding Weibull distribution parameters and determining the wind energy resource. In grid-connected wind producing plants, wind power forecasting is crucial for demand-supply equilibrium. Many accurate and dependable weather forecasting models use a range of modern methodologies. The electricity prediction is primarily dependent on short-term to second-by-second forecasting, intermediate duration of 2-7 days and with long-term prediction and short-term duration of nearly 2 days, with the help of various models.
Knowledge, Attitude and Practices of Breastfeeding among mothers of children six months to three years seen at a tertiary children hospital in Freetown
Authors: B Ell Nellie Valerie Tayo , Ikhurionan Paul Ehidiamen , Akhigbe Irene Eseohe , Mustapha Ayeshatu Majagbae , Ofovwe Gabriel Egberue
Published: August 2022

Introduction Severe acute malnutrition accounts for a significant proportion of admission into the tertiary children’s hospital in Freetown. However, adequate breastfeeding is supposed to protect against severe malnutrition. Against this background, the knowledge, attitude and practice of mothers of children admitted into the hospital, were assed to determine the current state of breastfeeding in Sierra Leone.
Methods: A structured questionnaire specifically designed and pretested was used to gather information on the knowledge, attitude and practice of breastfeeding of mothers with children aged 3 years and below admitted into ODCH between January and April 2021.
Result: Of the 206 mothers studied, 168 (81.6%) were aged 18 to 35 years, 145 (70.4%) married. Thirty-five (17%) respondents had inadequate knowledge, while 61 (29.6%) had poor attitude and 115 (55.8%) poor practice. Factors associated with poor breastfeeding practice include age below 18 years, unmarried mothers and delivery by Caesarian section. Exclusive breastfeeding for 6 months was associated with being married (ρ-0.002). Initiation of breast feeding within 1 hour was associated with being married (ρ-0.001) and vaginal delivery (ρ-0.005) while prelacteal feeding was associated with preterm delivery (ρ-0.020).
Conclusion: Despite a high prevalence of adequate knowledge among mothers of children presenting in the facility, the practice of breast feeding remain poor. There is need to provide support to mothers to appropriately carry out good breast feeding practices especially for younger and unmarried mothers and those who deliver via ceasarean section.
Prevalence and risk factors of acute malnutrition among pre-school children in internally displaced person settlements within Abuja Municipal Area Council
Authors: Oyinwola Oluwafisayo I , Ahmed Patience , Odusanya Olumuyiwa O , Oyasakin Adewumi B
Published: August 2022

Background: Malnutrition is pervasive among displaced populations worldwide. Adequate nutrition is essential to the growth and development of all children, particularly in the preschool age.
Methodology: This cross-sectional study was conducted in four internally displaced person (IDP) settlements and their host communities within the Abuja municipal area council between April and May 2019. Using a multistage sampling method, subjects were recruited after parents’ informed consent, from the IDP settlements and equal numbers were drawn from their host communities. The proportion of acute malnutrition using weight for height, MUAC, BMI-for-age Z scores were compared to the 2006 WHO standards. Predictors were determined by logistic regression and statistical significance was set at p less than 0.05.
Results: There were 1,179 children aged six to 59 months recruited in each group. The prevalence of wasting was 7.7% (91), moderate acute malnutrition was 7.2% (85), and severe acute malnutrition was 3.1% (37) among the IDPs while they were 7.1% (84), 6.5% (77) and 2.9% (34) respectively in the host communities. The predictors for wasting in both groups were age below 24months (Adj OR, 95% CI - 3.88, 2.38 - 6.32), low birth weight (Adj OR, 95% CI – 2.70, 1.55 – 4.71) and diarrheal disease (Adj OR, 95% CI - 5.45, 2.38 - 12.44). Location was predictive only in the host communities (Adj OR, 95% CI – 2.69, 1.37 – 5.28).
Conclusion and recommendation: Acute malnutrition was high among the pre-school children in this study. The nutritional needs of displaced children in the FCT should be met and their families educated on prompt recognition and treatment of diarrhoea.
Improving students’ performance examinations on the keyboard through selected pedagogical approaches: a study of the department of music, Federal College of Education, Eha-Amufu
Authors: Ozoaghuta Paschal Chibuike , Ojukwu Ebele Veronica
Published: August 2022

The teaching and learning of keyboard pieces involves complex processes and multiple factors. This is to say that performing keyboard pieces especially during the individual performance examinations is the most difficult aspect of music examination that upset the students of music in a great way. Therefore, this study attempts to identify the causes of students’ challenges and difficulties in their keyboard learning. Through the adoption of some effective pedagogical approaches, the researcher hopes to minimize their challenges and maximize their individual performance examinations on the keyboard. The Department of Music, Federal College of Education, Eha-Amufu was a reference point. The researcher adopted a survey research design. The population for the study comprised thirty (30) students selected through simple random sampling. Data were gathered through the use of questionnaire which was designed to find the causes of students’ difficulties in keyboard learning. The results show that the students of the above named institutions have three kinds of problems as regards keyboard learning such as practicing without setting up a goal, practicing without engaging in chordal analysis, and practicing only when they have spare time. These are unhealthy attitudes in keyboard learning. Different pedagogical approaches were proposed by the researcher to address the challenges such as engaging in goal setting, engaging in chordal analysis and constant practice. Based on these findings, the researcher recommends that keyboard instructors should emphasize the importance of goal setting, chordal analysis and frequent practice to their students.
Shakespeare in the bush: Gender constructions and interpretations of Hamlet by the West African Tiv
Authors: Yalley Abena Asefuaba
Published: August 2022

This paper analyses how gender is constructed by the Tivs through their interpretation of Hamlet in comparison with how Shakespeare projects these characters. Hamlet, a tragic play by Shakespeare, presents a patriarchal system of governance with strong themes of betrayal, love, kinship, religion, and revenge. The lack of agency and autonomy of women, sexual objectification, and their plagues as victims of patriarchy portrayed in Hamlet is a vivid presentation of the fate of women in a patriarchal world. While these may seem universal, the contradictory interpretation of Hamlet by the Tivs in Nigeria demands an inquiry into how the people of Tiv construct and interpret gender in Shakespeare's Hamlet. This paper, therefore, compares the Tiv's culture and gender values with Shakespeare’s Hamlet. The paper argues that the Tiv’s construction of gender contradicts Western conceptions of gruesome patriarchal performance in Africa as presented in Western literature. The analysis revealed that the Tiv’s construction of gender gave more agency, power, and respect to women and differed significantly from how Shakespeare constructed gender in Hamlet. The masculinization of witchcraft and the demeaning of the male characters in Hamlet gave less honour and power to the male characters. Tiv’s interpretations and gender constructions present a rather diverging representation of women in Hamlet based on cultural negotiations and lived experiences; thereby, demonstrating how cultural dynamism shapes gender constructions.
Enhancing Mathematics Learning by Integrating Growth Mindset Principles in Ninth-Grade Supplementary Materials
Authors: Repuya Christian Renales , Esterninos Jedh
Published: August 2022

This paper determined the supplementary materials in ninth-grade mathematics which may be enhanced to integrate growth mindset principles to improve students’ procedural fluency and foster their growth mindset in mathematics. This study employed a descriptive-developmental method by administering a quasi-experimental design and mixed-method research approach to determine the research questions. The respondents in this study were the 60 ninth-grade students at a state secondary high school in the Philippines. The study implemented the validated researcher-made procedural fluency test and growth mindset questionnaire in determining students’ performance in procedural fluency and mindset in mathematics, respectively. Thematic analysis was employed to investigate students’ responses in Focus Group Discussions (FGD), informal interviews and learning journals in scrutinising the learning experiences and mindsets of the students. Findings displayed that the supplementary materials which can be developed in incorporating growth mindset principles were motivational activities, reflection activities, and instructional videos. Utilising the developed supplementary materials elevates students’ procedural fluency. It influences students to shift from fixed mindsets to growth mindsets in mathematics by providing them with significant learning experiences that help students enhance a growth mindset. Furthermore, the implementation group performed better than the comparison group, particularly with developing growth mindsets. The study results are limited to the participants encompassing; similar research employing the developed supplementary materials to other learning areas with a larger sample is recommended for more generalisable results.
Technology-enhanced constructivist learning environment for pharmacy students
Authors: Afanasenko Olga V. , Nizhenkovska Iryna V. , Holovchenko Oksana I. , Glushachenko Olga O.
Published: August 2022

Objective: This article focuses on constructive learning theory and demonstrates how digital technologies can develop cognitive and metacognitive abilities in pharmacy students.   
Method: The mixed methodology was used to analyse pharmacy educators’ (n=10) and students’ (n=26) perceptions of the efficiency of online digital resources for the creation of a constructivist learning environment. The authors adapted Constructivist Multimedia Learning Environment Survey by adding the rubric for self-reflective skills and teachers’ support assessment. The qualitative data was collected by interviewing teachers and through self-reflective open discussions. After the session of webinars and self-paced MOOC on the constructivism approach, teachers transformed video lectures into interactive video lessons, conventional theoretic-oriented tasks into web cases and web quests.   
Result: Comparing the results of the initial students’ evaluation of traditional learning materials and the updated ones, there were positive dynamics in all six domains (average item mean): learning to communicate (5.4 points), learning to investigate (7.8 points), learning to think (4.2 points), relevance (8.6 points), challenges (0.9 points), ease of use (1.2 points), and quality of support (7.2 points).   
Conclusion: Experts observed teaching activities for critical thinking and inquiry skills development, personalised communication, and integration of digital technologies. The results of the study indicated that there were positive transformations toward the constructivist learning environment.
Does the United States Bond Yield Affect Foreign Institutional Investor Inflows to India and Indian Stock Market?
Authors: Balakrishnan Charumathi , Rahman Habeebu
Published: August 2022

We investigate the extent to which the United States (US) bond yield affects foreign institutional investor (FII) inflows and the performance of the Indian stock market using monthly time-series data from 2002 to 2021. We use the vector autoregressive model and apply the Granger causality test to investigate this relationship. We find no short- and long-run relationships among the US bond yield, FII inflows, and India’s stock market performance.