bluuebunny/crossref_metadata_2025_split huggingface dataset:
Searching for Compact Objects in Binaries with Gaia DR3
Authors: Fu Jin-Bo , Gu Wei-Min , Zhang Zhi-Xiang , Yi Tuan , Qi Sen-Yu , Zheng Ling-Lin , Liu Jifeng 
Published: November 2022

Abstract
We search for compact objects in binaries based on Gaia DR3. A sample of 10 targets is derived under the following conditions: the radial velocity variable, low temperature (T
eff < 6000 K), high mass function (f(M
2) > 1M
⊙), and ellipsoidal-like light curves. Two targets have LAMOST spectroscopic observations, one of which is a double-lined spectroscopic binary. The observational data of seven targets are not self-consistent, since their photometric periods are even shorter than the theoretical minimum orbital periods calculated by the stellar parameters from Gaia DR3. After excluding these seven inconsistent targets and another target contaminated by a near-bright star, the remaining two targets may contain compact objects worth follow-up observations. This work may serve as an example to demonstrate the feasibility of searching for compact objects in the massive Gaia data.
Variability from Thermoresistive Instability in the Atmospheres of Hot Jupiters
Authors: Hardy Raphaël , Cumming Andrew , Charbonneau Paul 
Published: November 2022

Abstract
The atmosphere of a hot Jupiter may be subject to a thermoresistive instability, in which the increasing electrical conductivity with temperature leads to runaway ohmic heating. We introduce a simplified model of the local dynamics in the equatorial region of a hot Jupiter that incorporates the back reaction on the atmospheric flow as the increasing electrical conductivity leads to flux freezing, which in turn quenches the flow and therefore the ohmic heating. We demonstrate a new time-dependent solution that emerges for a temperature-dependent electrical conductivity (whereas a temperature-independent conductivity always evolves to a steady state). The periodic cycle consists of bursts of Alfvén oscillations separated by quiescent intervals, with the magnetic Reynolds number alternating between values smaller than and larger than unity, maintaining the oscillation. We investigate the regions of pressure and temperature in which the instability operates. For the typical equatorial accelerations seen in atmospheric models, we find instability at pressures ∼0.1–1 bar and temperatures ≈1300–1800 K for magnetic fields ∼10 G. Unlike previous studies based on a constant wind velocity, we find that the instability is stronger for weaker magnetic fields. Our results add support to the idea that variability should be a feature of magnetized hot Jupiter atmospheres, particularly at intermediate temperatures. The temperature dependence of the electrical conductivity is an important ingredient that should be included in MHD models of hot Jupiter atmospheric dynamics.
Multiple Transitions in Vacuum Dark Energy and H
0 Tension
Authors: Moshafi Hossein , Firouzjahi Hassan , Talebian Alireza 
Published: November 2022

Abstract
We study the effects of multiple transitions in the vacuum dark energy density on the H
0 tension problem. We consider a phenomenological model in which the vacuum energy density undergoes multiple transitions in the early as well as the late universe and compare the model’s predictions using the three sets of data from the cosmic microwave background, baryonic acoustic oscillations, and supernovae. The transient dark energy can be either positive (dS-like) or negative (AdS-like). We conclude that a transient late-time AdS-type vacuum energy typically yields the higher value of H
0, which can alleviate the H
0 tension. In addition, to obtain a value of H
0 comparable to the value obtained from the local cosmological measurements the spectral index n

s
moves toward its Harrison–Zel’dovich scale-invariant value.
A Data-constrained Magnetohydrodynamic Simulation of the X1.0 Solar Flare of 2021 October 28
Authors: Yamasaki Daiki , Inoue Satoshi , Bamba Yumi , Lee Jeongwoo , Wang Haimin 
Published: November 2022

Abstract
The solar active region NOAA 12887 produced a strong X1.0 flare on 2021 October 28, which exhibits X-shaped flare ribbons and a circle-shaped erupting filament. To understand the eruption process with these characteristics, we conducted a data-constrained magnetohydrodynamics simulation using a nonlinear force-free field of the active region about an hour before the flare as the initial condition. Our simulation reproduces the filament eruption observed in the Hα images of GONG and the 304 Å images of SDO/AIA, and suggests that two mechanisms can possibly contribute to the magnetic eruption. One is the torus instability of the preexisting magnetic flux rope (MFR) and the other is upward pushing by magnetic loops newly formed below the MFR via continuous magnetic reconnection between two sheared magnetic arcades. The presence of this reconnection is evidenced by the SDO/AIA observations of the 1600 Å brightening in the footpoints of the sheared arcades at the flare onset. To clarify which process is more essential for the eruption, we performed an experimental simulation in which the reconnection between the sheared field lines is suppressed. In this case too, the MFR could erupt, but at a much reduced rising speed. We interpret this result as indicating that the eruption is not only driven by the torus instability, but additionally accelerated by newly formed and rising magnetic loops under continuous reconnection.
Detection of ESBLs and carbapenemases among Enterobacteriaceae isolated from diabetic foot infections in Ouargla, Algeria
Authors: Khaldi Zohra , Nayme Kaotar , Bourjilat Fatna , Bensaci Abdelmadjid , Timinouni Mohammed , Ould El-Hadj-Khelil Aminata 
Published: November 2022

Introduction: The emergence and rapid spread of Enterobacteriaceae carrying extended spectrum beta-lactamases (ESBLs) and carbapenemases represent a great threat to clinical treatment due to their multi-drug resistance. This study investigated ESBLs and carbapenemases encoding genes in Enterobacteriaceae collected from diabetic foot infections (DFIs) in Ouargla, southern Algeria.
Methodology: A total of 70 Enterobacteriaceae strains were recovered from 76 patients with DFI between February 2017 and April 2018. Antimicrobial susceptibility testing was performed using the disc diffusion method, and the presence of bla genes was detected using polymerase chain reaction (PCR) and DNA sequencing. The genetic transfer of the plasmids was carried out by conjugation using the broth mating method.
Results: The most common isolate was Proteus mirabilis, followed by Escherichia coli, Morganella morganii and Klebsiella pneumoniae. The prevalence of ESBL and carbapenemase-producing Enterobacteriaceae was 11.42% and 2.85 % respectively. Plasmid-mediated AmpC was detected in 5.71% isolates. Conjugation experiments showed the transferability of blaCTX-M-2.
Conclusions: Our findings support the view that various pathogens found in DFIs differ from one part of the country to another. This study reports the first description of metallo-β-lactamase NDM-5 producing Klebsiella pneumoniae clinical isolate in Algeria.
Anti-malarial investigation of Acorus calamus, Dichapetalum gelonioides, and Leucas aspera on Plasmodium falciparum strains
Authors: Zamil Md Fahad , Arefeen Sazed Saiful , Haque Hossainey Muhammad Riadul , Biswas Anik , Alam Mohammad Shafiul , Khanum Hamida , Barua Priyanka 
Published: November 2022

Introduction: Malaria is a significant global health concern and adversely affects people in developing countries including Bangladesh. The causative agent Plasmodium falciparum is resistant to several currently available anti-malarial drugs, such as mefloquine, chloroquine, and artemisinin-based combination therapy (ACT), and this has been a major global challenge towards the control of the disease. There is urgent need for novel anti-malarial chemotherapeutic agents.
Methodology: The present study aimed to evaluate antimalarial activity of methanolic extracts of three Bangladeshi medicinal plants- Acorus calamus, Dichapetalum gelonioides and Leucas aspera - against both chloroquine sensitive (3D7) and resistant (Dd2) strains of P. falciparum. Histidine-rich protein 2 (HRP2) based ELISA was used to evaluate the in vitro inhibitory activity of the extracts.
Results: D. gelonioides extract showed moderate (IC50 = 19.15 µg/mL) and promising activity (IC50 = 10.43 µg/mL) against 3D7 and Dd2 strains respectively. A. calamus remained inactive against both 3D7 (IC50 = 72.29 µg/mL) and Dd2 strain (IC50 = 67.81 µg/mL). L. aspera initially remained inactive against 3D7 strain (IC50 = 60.51 µg/mL), but displayed promising activity (IC50 = 7.693) against Dd2 strain.
Conclusions: This is the first time these plant materials have been assessed for their in vitro antimalarial properties. It is pivotal to conduct further phytochemical analysis of D. gelonioides and L. aspera to evaluate the presence of potential novel antimalarial drug compounds.
A potential role of cockroaches in the transmission of pathogenic bacteria with antibiotic resistance: A scoping review
Authors: Luckyjane Molewa Mapula , Barnard Tobias , Naicker Nisha 
Published: November 2022

Introduction: The role of cockroaches in the cause of disease or human infections is not immediately obvious. The present study aimed to review the currently available research on the potential role of cockroaches in the transmission of pathogenic bacteria and bacteria with antibiotic resistance.
Methodology: A scoping review included the studies published for a period between January 2001 and December 2020. A search was performed through five databases, namely, PubMed, Sage, Springer, Sabinet, and Science Direct. A search strategy used was conducted according to the principles of Preferred Reporting Item for Systemic Reviews and Meta-Analyses (PRISMA). From 97 studies identified, 32 studies were included in the scoping review.
Results: The findings indicate that cockroaches may be a potential vector for a diverse range of pathogenic bacterial agents. Most bacterial agents isolated are antidrug-resistant and antibiotic-resistant which is considered the greatest threat to public health in the current period.
Conclusions: Cockroach infestation should be considered as a serious concern, given the possible role of cockroaches as reservoirs of antibiotic-resistant bacteria. Further research is needed which can provide a comprehensive understanding of the role of cockroaches in transmitting human infections.
The development of a conceptual rural logistics system model to improve products distribution in Indonesia
Authors: Sinaga Tuti Sarma , Hidayat Yosi Agustina , Wangsaputra Rachmawati , Bahagia Senator Nur 
Published: November 2022

Purpose: The role of speculators in distributing products across rural areas is increasing the poverty rate in Indonesia. Therefore, this study aims to develop a conceptual framework of the rural logistics system model to influence the welfare and sustainability of farmers.Design/methodology/approach: Conceptual framework was used to evaluate logistics and supply chain networks. The method consists of developing stages based on four components, namely network structure, management, resources, and business processes. Furthermore, it also proposed the management function of the rural logistics system models.Findings: The model of a rural logistics system obtained in this study consists of 1) a trade related to the network of business, 2) a freight, related to the flow of goods, and 3) management functions related to crucial activities in rural logistics management.Research limitations/implications: This model is conceptual, therefore, future studies must accommodate optimizing models to predict the performance of rural logistics systems when they are applied in Indonesia.Practical implications: This study promotes the actors in intermediaries of the rural logistics system to synergize the distribution of goods effectively and efficiently. It also reduces the role of speculators in product distribution in form of availability and price in rural areas.Social implications: This model is a strategy to achieve the Rural Sustainable development Goals (Rural-SDGs) agenda and complements the Blueprint of The National Logistics System.Originality/value: There are fewer studies in rural logistics compared to other fields such as agricultural logistics, food logistics, disaster logistics, etc. Therefore, this study organizes the actors in the rural logistics network and plans management functions for the efficient distribution of products across Indonesia. It also raises the awareness of logistics management to improve the welfare of rural communities.
Using Android-Based E-Module to Improve Students’ Digital Literacy on Chemical Bonding
Authors: Dewi Citra Ayu , Awaliyah Nurdianti , Fitriana Nurin , Darmayani Satya , Nasrullah  , Setiawan Jan , Irwanto Irwanto 
Published: November 2022

Digital literacy is critical in the current era of digitalization. Therefore, students are required to be digitally literate. This study aims to improve students’ digital literacy using an android-based e-module in chemical bonding. This study used a quasi-experimental method with a pre-experimental design that included a pretest and posttest for one group. For this study, 70 preservice teachers (10 males and 60 females) from the Department of Chemistry Education at a private university in Indonesia were recruited. The Digital Literacy Questionnaire (DLQ) was used to measure students’ digital literacy. To analyze the data, we used paired t-tests and N-gain. The results indicated a significant increase in digital literacy scores before and after treatment. Thus, it can be concluded that using an android-based e-module significantly enhances students’ digital literacy on chemical bonds. Due to its effectiveness, we recommend teachers use this e-module to elevate students’ academic performance, in general, in chemistry.
Plasmodium vivax Malaria Associated with Severe Autoimmune Hemolytic Anemia
Authors: Nishith Goranti , Sharma Vivek , Sharan Rajiv 
Published: November 2022

Background:
Severe and/or persistent anemia due to autoimmune hemolytic anemia (AIHA) secondary to vivax malaria is a rare association. Very few cases are reported worldwide, and even less from India. AIHA occurs when immunoglobulins and/or complements target red blood cell surface antigens resulting in hemolysis. Awareness of this complication helps in early recognition, investigation, and prompt initiation of treatment.

Clinical Description:
A 15-year-old boy presented with a history of high fever associated with chills for 2 days. Examination revealed the presence of severe pallor and icterus. Systemic examination was unremarkable. Investigations showed anemia (Hb: 3.6 g/dl) with reticulocytosis (6.6%), malaria (trophozoites of Plasmodium vivax and antigen test positive), and indirect evidence of hemolysis (indirect hyperbilirubinemia and elevated lactate dehydrogenase of 668 U/l).

Management and Outcome:
Treatment was started with intravenous artesunate and packed cells transfusion was planned. Cross-matching showed autoantibodies which raised suspicion of AIHA. Coomb's test was positive. Least incompatible packed red blood cells were transfused. A repeat peripheral smear was negative for malaria. Posttransfusion, the Hb levels rose to 8.3 g/dl before falling to 5.3 g/dl over the next 2 days. The direct antiglobulin test was positive. High doses of oral prednisolone resulted in progressive improvement in Hb levels to 8 g/dl within a week. He was discharged on oral prednisolone with daily oral folic acid supplements. The steroids were tapered when Hb reached 10.6 g/dl and continued for 3 months.

Conclusion:
If a patient with malaria (falciparum or vivax) exhibits persistent severe anemia, indirect evidence of hemolysis is found on investigations and/or autoantibodies identified on cross-matching, AIHA should be suspected and investigated accordingly.
Aggressive Systemic Mastocytosis with a Relatively Non-aggressive Course
Authors: Madaan Aishwarya , Yadav Vidya , Kataria Sumit , Mendiratta Vibhu , Shukla Shailaja , Jyotsna P L , Mukherjee Sharmila B. 
Published: November 2022

Background:
Mastocytosis is a heterogeneous group of disorders that is characterized by excessive proliferation and pathologic accumulation of mast cells in various body tissues. The mast cells also have abnormal morphology and aberrant expression of surface receptors.

Clinical Description:
A 4-year-old boy was brought with a history of generalized skin lesions since birth and abdominal distension for 3 years. The diagnosis had not been established to date. General physical examination revealed severe acute malnutrition, pallor, dental staining, facial hypertrichosis, polymorphous skin lesions (cicatricial alopecia, diffuse erythema, multiple plaques of variable diameter, skin-colored nodules, and hypertrophic irregular scars), and positive Darier's sign. He also had hepatosplenomegaly. The differentials considered were congenital erythropoietic porphyria, systemic mastocytosis (SM), multifocal Langerhans cell histiocytosis, and linear immunoglobulin A bullous dermatosis. The presence of mast cells on skin biopsy and elevated serum tryptase levels led us to suspect SM and perform bone marrow studies. The diagnosis of “aggressive” SM was initially made on the application of the diagnostic criteria but revised to “smoldering” SM with the emergence of Vitamin B12 deficiency as the probable cause of pancytopenia.

Management:
Management was planned by a multidisciplinary team: pediatrician, dermatologist, and hematopathologist. The parents were counseled about the nature, natural history, treatment options, and prognosis of the disorder. The child was provided with nutritional rehabilitation and medication for the cutaneous symptoms (selective histamine H1 receptor inverse agonist, H2-receptor antagonist, and application of topical tacrolimus and calamine lotion).

Conclusion:
The prognosis varies according to subtype. Careful correlation of clinical and laboratory investigations is required when applying the diagnostic criteria for staging.
Knowledge of Community-Based Health Insurance and Associated Factors Among Artisans in a Selected Community of Ekiti State
Authors: Elegbede O. E. , Durowade Kabir Adekunle , Sanni Taofeek Adedayo , Ipinnimo Tope Michael , Alabi Ayo Kamal 
Published: November 2022

Background:
The Community-Based Health Insurance Scheme (CBHIS) (National Health Insurance Scheme [NHIS]) pools the risk of high costs of health care across a large number of individuals, and it permits payment of a premium based on the average cost of health care for the group of people. This function of spreading risk in NHIS helps in making the cost of health-care services affordable for many individuals. Aim: This study which is aimed at assessing the knowledge of Community-Based Health Insurance (CBHIS) among artisans in Ekiti State will help in identifying and implementing strategies to widen health insurance services to this group of nonformal sector.

Materials and Methods:
A descriptive cross-sectional study was conducted among 416 respondents using a systematic random sampling technique among the skilled occupational group vis-a-vis bricklayers, carpenters, electricians, hair stylist, and tailors. Data were collated using an interviewer-administered semi-structured questionnaire and analysed using IBM SPSS version 23. Chi-square and binary logistic regression were used to assess the association between dependent and independent variables. P < 0.05 was taken as statistically significant.

Results:
The study participant mean age was 29.7 ± 10.9 years, majority were females (57.5%), and 46.9% had tertiary education. 53.1% were aware of health insurance, but only 24% were aware of CBHIS. Just about a fifth of the respondents (18.3%) had good knowledge of CBHIS. Significant factors and predictors of knowledge of CBHIS in this study include female gender, tertiary level of education, higher family income, and higher frequency of illness.

Conclusion:
The awareness and knowledge of CBHIS among artisans in Ekiti State is still very low. Factors associated with the low knowledge include gender, level of education, frequency of illness, and family income. Therefore, efforts at improving awareness and educating members of the public about the scheme will be beneficial.
Toward Eradication of Child Labour
Authors: Bisi-Onyemaechi Adaobi Ijeoma , Chikani Ugo Nnenna , Chime Pascal Uwadiegwu , Mbanefo Ngozi Rita , Nduagubam Obinna Chukwuebuka , Uwaezuoke Ndubuisi Anyele 
Published: November 2022

Background:
Child labour deprives children of their childhood, their potential, and their dignity and is harmful to their physical and mental development.

Aim:
The aim of this study was to determine the pattern and adverse effects associated with child labour in Enugu, Nigeria.

Patients, Materials and Methods:
This was a cross-sectional study using an in-depth interviewer-administered questionnaire guide on child labour and adverse effects among children aged 6 to <18 years.

Results:
The most common labour was hawking (39.2%) and shopkeeping (22.8%). Majority of the children work to support their families. Adverse conditions experienced by the participants include prolonged work hours (100%), assault (15.8%), hunger (15.2%), sexual abuse (14.6%), and accidents (9.9%). Children aged 6–12 years were at a higher risk of sexual abuse (P = 0.005, odds ratio = 2.463, 95% confidence interval = 1.311–4.630).

Conclusion:
Children in Enugu are still involved in the various forms of child labour which have detrimental effects on their well-being.
Ossifying Fibroma of the Jaws
Authors: Okwuosa Chukwubuzor Udokwu , Nwoga Mark Chukwuemeka , Adisa Akinyele O 
Published: November 2022

Background:
There are very few reports of the clinicopathological features of ossifying fibroma (OF) of the jaws in Enugu, South-east Nigeria.

Aims:
To study the prevalence and clinicopathological features of OF in Enugu.

Patients, Materials and Methods:
An eight-year retrospective study of patients with OF of the jaws was carried out in a tertiary hospital in Enugu, Nigeria. The clinical records, radiographs, histopathology reports, and slides of 87 patients with fibrous lesions, archived in the department of oral pathology and oral medicine were identified and examined. The cases diagnosed with OF by histological examination were retrieved and studied. The data were analysed using the descriptive statistics and presented in the form of frequency tables. The test for a statistical association was carried out using the Chi-square statistics.

Results:
There were 644 orofacial lesions and 13.5% (87) of these were fibro-osseous tumours. OF constituted 8.9% (57) of the orofacial lesions and 65.5% (57) of fibro-osseous tumors. The male-to-female ratio was 1:1.7. The overall mean age at tumour-onset was 24.1 ± 13.1 years, (range: 5–60 years). The age group at which OF occurred most frequently (43.9%) was 11–20 years. The mandible was the most common site of occurrence, 64.9% (37), while the radiographic features were well-circumscribed opacity 24.6% (14), and mixed lucency–opacity, 22.8% (13). Conventional 54 (94.7%) and juvenile-psammamatoid 3 (5.3%) subtypes were identified.

Conclusion:
OF is the most prevalent fibro-osseous lesion, occurred mostly in the second decade and exhibits a lower mean age of onset in male patients.