bluuebunny/crossref_metadata_2025 huggingface dataset:
Boundary preserving explicit scheme for the Aït-Sahalia mode
Authors: Halidias Nikolaos , Stamatiou Ioannis S.
Published: May 2022

We are interested in the numerical approximation of solutions of nonlinear stochastic differential equations, that appear in financial mathematics. Here, we study the Aït-Sahalia model. We propose an explicit numerical scheme where we actually approximate the Lamperti transformation of the original stochastic differential equation and then transform back. The proposed method is domain preserving and is proven to converge strongly to the solution process with order at least \begin{document}$ 1 $\end{document} with no extra restrictions on the step-size \begin{document}$ \Delta $\end{document}. Numerical experiments verify the theoretical results.
Convergence of a nonlocal to a local diffuse interface model for two-phase flow with unmatched densities
Authors: Abels Helmut , Terasawa Yutaka
Published: May 2022

We prove convergence of suitable subsequences of weak solutions of a diffuse interface model for the two-phase flow of incompressible fluids with different densities with a nonlocal Cahn-Hilliard equation to weak solutions of the corresponding system with a standard "local" Cahn-Hilliard equation. The analysis is done in the case of a sufficiently smooth bounded domain with no-slip boundary condition for the velocity and Neumann boundary conditions for the Cahn-Hilliard equation. The proof is based on the corresponding result in the case of a single Cahn-Hilliard equation and compactness arguments used in the proof of existence of weak solutions for the diffuse interface model.
Blow-up properties of solutions to a class of $ p $-Kirchhoff evolution equations
Authors: Yang Hui , Ma Futao , Gao Wenjie , Han Yuzhu
Published: May 2022

This paper is devoted to an initial-boundary value problem for a class of $ p $-Kirchhoff type parabolic equations. Firstly, we consider this problem with a general nonlocal coefficient $ M(\|\nabla u\|_p^p) $ and a general nonlinearity $ k(t)f(u) $. A new finite time blow-up criterion is established, also, the upper and lower bounds for the blow-up time are derived. Secondly, we deal with the case that $ M(\|\nabla u\|_p^p) = a+b\|\nabla u\|_p^p $, $ k(t)\equiv1 $ and $ f(u) = |u|^{q-1}u $, which was considered by Li and Han [Math. Model. Anal. 2019; 24: 195-217] only for $ q > 2p-1 $. The threshold results for the existence of global and finite time blow-up solutions to this problem are obtained for the case $ 1 < q\leq 2p-1 $, which, together with the results given by Li and Han, shows that $ q = 2p-1 $ is critical for the existence of finite time blow-up solutions to this problem. These results partially generalize and extend some recent ones in previous literature.
Hopf bifurcation analysis in a delayed diffusive predator-prey system with nonlocal competition and generalist predator
Authors: Nie Chenxuan , Jin Dan , Yang Ruizhi
Published: May 2022

A delayed diffusive predator-prey system with nonlocal competition and generalist predators is considered. The local stability of the positive equilibrium and Hopf bifurcation at positive equilibrium is studied by using time delay as a parameter. In addition, the property of Hopf bifurcation is analyzed using the center manifold theorem and normal form method. It is determined that time delays can affect the stability of the positive equilibrium and induce spatial inhomogeneous periodic oscillation of prey and predator population densities.
Analysis of HIV/AIDS model with Mittag-Leffler kernel
Authors: Akram Muhammad Mannan , Farman Muhammad , Akgül Ali , Saleem Muhammad Umer , Ahmad Aqeel , Partohaghigh Mohammad , Jarad Fahd
Published: May 2022

Recently different definitions of fractional derivatives are proposed for the development of real-world systems and mathematical models. In this paper, our main concern is to develop and analyze the effective numerical method for fractional order HIV/ AIDS model which is advanced approach for such biological models. With the help of an effective techniques and Sumudu transform, some new results are developed. Fractional order HIV/AIDS model is analyzed. Analysis for proposed model is new which will be helpful to understand the outbreak of HIV/AIDS in a community and will be helpful for future analysis to overcome the effect of HIV/AIDS. Novel numerical procedures are used for graphical results and their discussion.
$ k $-domination and total $ k $-domination numbers in catacondensed hexagonal systems
Authors: Bermudo Sergio , Higuita Robinson A. , Rada Juan
Published: May 2022

In this paper we study the $ k $-domination and total $ k $-domination numbers of catacondensed hexagonal systems. More precisely, we give the value of the total domination number, we find upper and lower bounds for the $ 2 $-domination number and the total $ 2 $-domination number, characterizing the catacondensed hexagonal systems which attain these bounds, and we give the value of the $ 3 $-domination number for any catacondensed hexagonal system with a given number of hexagons. These results complete the study of $ k $-domination and total $ k $-domination of catacondensed hexagonal systems for all possible values of $ k $.
Pricing hybrid-triggered catastrophe bonds based on copula-EVT model
Authors: Wei Longfei , Liu Lu , Hou Jialong
Published: May 2022

This paper presents a hybrid-triggered catastrophe bond (CAT bond) pricing model. We take earthquake CAT bonds as an example for model construction and numerical analysis. According to the characteristics of earthquake disasters, we choose direct economic loss and magnitude as trigger indicators. The marginal distributions of the two trigger indicators are depicted using extreme value theory, and the joint distribution is established by using a copula function. Furthermore, we derive a multi-year hybrid-triggered CAT bond pricing formula under stochastic interest rates. The numerical experiments show that the bond price is negatively correlated with maturity, market interest rate and dependence of trigger indicators, and positively correlated with trigger level and coupon rate. This study can be used as a reference for formulating reasonable CAT bond pricing strategies.
Development of a Mobile-Healthcare Application for Safety and Prevention in Emergency Assistance at Marathon Events: A Case Study in CMU Marathon
Authors: Sirasakamol Orasa , Ariya Pakinee , Nadee Wanvimol , Puritat Kitti
Published: May 2022

The majority of marathon deaths are caused by sudden cardia arrest which occurs in approximately 1 in 100,000 runners around the world. In such cases, sudden resuscitation of first aid, including an early use of automated external defibrillator (AED) on runners by medical staff is immediately necessary. However, in some cases patient information of the runner is required to support the clinical decision-making of the medical staff, including the admission to hospital with certain symptoms. To make marathon events safer, we developed a mobile-healthcare emergency assistance application for safety and prevention in marathon events. Our project covers three phases: registration, data analytics and running phases. In the registration phase, we designed and developed a form containing the runner’s electronic personal health record filled in during the registration of the runner at the event. For the analytics and running phases, we analyze the data from the registration phase in order to prepare the capacity of resource and medical staff necessary to prevent and treat injuries and accidents including a sufficient number of AED devices. Finally, for the running phase, we developed a mobile application Medic and Track based on the qr code scanning in BIB for patient information that allows to locate the runner's emergency aid point and bring the patient to that rescue point or hospital. We also tested the application on a large number of runners participating in the CMU marathon 2020 with 9721 runners. The results of this study suggest that the purpose of our application can be generally accepted for the medical staff, and it also proved to be a suitable technology to prevent serious accidents in future marathon events.
The Comparison of the Top 100 Cited Publications of Augmented Reality and Virtual Reality for the Last Thirty Years
Authors: Prahani Binar Kurnia , Nisa' Khoirun , Jatmiko Budi , Suprapto Nadi , Amelia Tan , Candrawati Emilia
Published: May 2022

The development of technology like mobile devices, computers and other smart devices is developing rapidly, especially AR and VR technologies. This study describes comparison among 100 cited papers in the field of AR and VR studies. Research data covering the top one hundred cited publications for the last thirty years were obtained from the Scopus database. Article is most publication document type. The majority of these top-cited papers were published in 2005 for VR and 2013 for AR. The journal Computer and Education is the primary source of the Elsevier, which governs the publication of the most influential AR-VR studies. Most research articles have multiple authors. Slater and Feiner are recognized as the most productive author. The United States dominates the production of highly cited AR-VR papers. Future research should focus on other disciplines, use one or more keywords, and collaborate with Google Scholar, the Web of Science data, for in-depth analysis.
Fibonacci Multichaos Algorithm for Medical Image Encryption for Transmission Through Wavelet Transform Based OFDM System and Its VLSI Realization
Authors: Ch Gangadhar , Md Habibulla , T Mahalakshmi , D Praveena , Ch SriLakshmi , K Phani Rama Krishna
Published: May 2022

At every stage of the digital media transfer, storage, and retrieval process, sensitive images are rendered indecipherable through the use of image encryption. Germany's hospitals have relied on image encryption for years to keep patient data from being accessed by the IT personnel, stolen or left recorded into the network system that could be compromised remotely.

In order to encrypt a file manually, the process is extremely time- and effort-consuming. Automating this process while retaining high security is desirable. In this research, we present an approach for encrypting medical images that combines scientific computing with cryptography.

This algorithm uses the Fibonacci Multi Chaos Algorithm to encrypt medical images, making them more secure. Distinct wavelet transform orthogonal frequency division multiplexing is used to convey picture data in this work, which is a reliable and secure method.
Practical guidelines for development of a university-wide faculty mentorship program using a multimodal mentoring network model
Authors: Schwartz Matthew G.
Published: May 2022

Formal faculty mentorship programs are a practical and effective pathway to enable faculty success in teaching, scholarship, and service and to enhance faculty satisfaction. Although informal mentoring relationships benefit some faculty, formal faculty mentorship programs ensure equitable access to mentorship for female faculty and faculty from diverse, under-represented backgrounds. Formal faculty mentorship programs can utilize a variety of structures, each with their benefits and drawbacks. This article recommends a multimodal mentoring network model to harness the benefits of traditional dyadic mentoring, multiple-mentor mentorship, peer and near-peer mentorship, and topic- and affinity-based group mentorship and to confer the flexibility, adaptability, and support needed to best cater to the career and psychosocial needs of a diverse faculty. In addition to identifying a suitable program structure, creating a successful university-wide faculty mentorship program requires consultation with faculty of all levels, collaboration with multiple campus departments and stakeholders, and highly visible support from senior administrators. Successful implementation and maintenance of a multimodal university-wide faculty mentorship program also requires appropriate resources and incentives to build and sustain a culture of faculty participation. This article provides practical, evidence-based recommendations for the successful design and implementation of a multimodal university-wide faculty mentorship program.
Multilevel Governance of Migration for Sustainable Development: Perspectives from the Global Souths
Authors: Degila Dêlidji Eric , Valle Valeria Marina
Published: May 2022

This chapter introduces the thematic volume Governing Migration for Development from the Global Souths: Challenges and Opportunities. It presents the aims and scope of the Volume, and a discussion on contributions to migration studies from the global Souths, in particular analysing positive and negative aspects of the multilevel governance of migration. It also provides an overview of a broad conceptualisation of sustainable development through five dimensions—people, planet, profit, peace and partnerships—before highlighting the main contributions of the individual chapters. Finally, we conclude by underlining the insights brought by a multiplicity of perspectives from the global Souths to an analysis of the complex configuration of migration governance.
Multilateral Approaches to Mobility in the Middle East and North Africa Region
Authors: Naujoks Daniel
Published: May 2022

Development plans increasingly integrate aspects of migration and displacement, reflecting the countless links between sustainable development and human mobility. To understand the incorporation of issues related to human mobility into development plans and policies, this chapter analyses all current United Nations Development Assistance Frameworks (UNDAFs) in the Middle East and North Africa (MENA). The MENA region is characterised by high levels of outmigration and displacement, transit migration, immigration, and hosts a large share of the world’s refugees. UNDAFs – planning documents that provide a system-wide overview of key United Nations (UN) activities and functions at the country level – provide a promising platform to investigate linkages between migration, displacement, human development, multilateral and interagency cooperation, and the politics of development aid and international relations. To assess how exactly UN development plans address immigration, emigration, transit migration, internal and international displacement, diaspora engagement and remittances, this chapter introduces the Index of Mobility Inclusion (IMI) which measures the intensity, modality, and dimensionality of how mobility has been integrated into development plans. Based on an analysis of all current UNDAFs, the component and aggregate IMI levels show varying degrees of mobility inclusion. A comparison of the three IMI components for all 14 plans in the MENA region reveals that mobility-related policies include a broad range of public policy sectors and focus on various target populations. This paper concludes by offering initial insights into and hypotheses on what determines whether mobility is included in UN development plans.
Migration, Health and Development in India, South Asia and China: Perspectives in the COVID-19 Era
Authors: Khadria Binod , Thakur Narender , Mishra Ratnam
Published: May 2022

This chapter revisits the relationship between migration, health and development in the context of Global Compact for Safe, Orderly and Regular Migration (GCM) objectives interrupted by the external shock of the COVID-19 pandemic. By using recent and emerging data from global sources like the United Nations (UN), World Health Organization (WHO) and World Bank, it looks at health indicators, migration stocks and economic development parameters in select South Asian countries, including India, over the last three decades—1990–2020. These are compared against both the world totals and those for China—the East Asian country at the epicentre of COVID-19. The chapter provides background on comparative indicators of economic development in India, other major South Asian countries and China, and critically examines three issues: (a) lessons from the challenges COVID-19 posed to the GCM objective of making migration ‘safe, orderly and regular’ (SOR); (b) indicators of the relationship between migration, health and development in the context of the GCM and COVID-19; and (c) challenges emerging from the dynamic relationship between migration, health and development in the COVID-19 era.
Immigrants’ Contribution to Development in the Global South: Comparing Policy Responses to Venezuelan Immigration in Peru and Argentina
Authors: Levaggi Ariel González , Freier Luisa Feline
Published: May 2022

By April 2021, Venezuela’s multidimensional crisis had led over 5.6 million of the country’s citizens to emigrate, mostly across South America. This chapter offers a comparative analysis of national policy responses to Venezuelan immigration in Argentina and Peru from a development perspective in the period 2015‒2020. Although the government of each country recognised the potential of disproportionate numbers of highly skilled Venezuelan immigrants, Argentina has been more successful than Peru in offering them legal pathways to immigration and incorporating them into the formal labour market. Our key argument is that Argentina has been able to foster the integration of Venezuelans—in terms of granting regular status, validating academic and professional degrees and providing access to basic social services—for three reasons: first, the lower overall numbers and higher socio-economic characteristics of the migrants; second, Argentina’s progressive legislative immigration framework; and third, the prominent role of civil society actors lobbying for immigrants and pushing for more inclusive public policies. In the case of Peru, the rapid increase in numbers of immigrants has led to a surge in xenophobic public opinion, which has generated pressure to implement non-inclusive policies. The country’s new immigration law lacks institutional consolidation, and there is no strong civil society to act as a counterweight to restrictive policy developments. The chapter contributes to the literature on the migration–development nexus, pointing out the importance of state capacity and civil society when thinking about migration and development in the global South.
The National Health Policy for International Migrants in Chile, 2014–17
Authors: Wiff Jossette Iribarne , Benítez Andrea Fernández , González Marcela Pezoa , Padilla Claudia , Chepo Macarena , Leyva Flores René
Published: May 2022

At the global level, the equal recognition of migrant rights is among the most important challenges for modern society. This chapter aims to analyse the formulation and implementation processes of the National Health Policy for International Migrants in Chile (NHPIM), as well as its short-term results, from 2014 to 2017. It is based on a review of the literature on and deriving from the consultative processes performed in communities with high mobility and residency rates for international migrants, and key documents related to the Policy. It analyses public sector health coverage from the National Health Fund of Chile (Fondo Nacional de Salud, or FONASA), health service usage, and fulfilment of health needs, comparing the general Chilean population to the migrant population in Chile using data from the National Socioeconomic Characterization Survey (CASEN Survey) from 2013, 2015 and 2017.The formulation of the NHPIM was a response to evidence generated through consultation and social participation. It eliminated legislative and legal barriers, and favoured financial protection through coverage by FONASA. Over the period analysed, the number of migrants with FONASA coverage doubled (from 243,000 to 506,000); the rate of healthcare service usage increased (from 0.81 to 1.36 per 100 migrants); the rate of hospital discharges remained steady (3.2 per 100 migrants), although the net number of discharges doubled; and the proportion of migrant hospital discharges without FONASA coverage fell from 25.5 per cent to 7.8 per cent. The protection of the right to health for international migrants in Chile is a prime example of the effective translation of political discourse into concrete social practice.
Cerebral Visual Loss
Authors: Barton Jason J. S.
Published: May 2022

Cerebral visual disorders include a range of common and rare deficits. They can be divided into effects on low-, intermediate-, and high-level forms of visual processing. Low-level deficits are various forms of homonymous hemifield scotomata, which affect all types of vision within their borders. Intermediate-level deficits refer to impairments of colour or motion perception, which affect either one hemifield or the entire field when lesions are bilateral. High-level deficits are divided into those of the ventral (occipitotemporal) or dorsal (occipitoparietal) stream. Occipitotemporal lesions affect various aspects of object recognition, ranging from general visual agnosia to selective agnosias, such as prosopagnosia or topographagnosia from right or bilateral lesions, and pure alexia from left-sided lesions. Occipitoparietal lesions cause the various components of Bálint syndrome, namely, simultanagnosia, optic ataxia, and ocular motor apraxia. They can also cause other impairments of visuospatial or visuotemporal processing, such as astereopsis and sequence-agnosia. Because of anatomic proximity, certain deficits cluster together to form a number of cerebral visual syndromes. Treatment of these disorders remains challenging, with frequent reliance on strategic substitutions rather than restorative approaches.
Modified indwelling pleural catheter versus silver nitrate pleurodesis for the management of malignant pleural effusion
Authors: Abdelghany Mohammed F. , Essmat Khaled , El-Karn Atef Farouk , Youssif Sahar Farghly
Published: May 2022

Background

About half of the patients suffering from malignant pleural effusion (MPE) complain of dyspnea with poor quality of life.

Objective

The aim of this study was to compare the efficacy and safety of silver nitrate pleurodesis (SNP) via tube thoracostomy and modified indwelling pleural catheter (IPC) in the management of patients complaining of recurrent symptomatic MPE.

Patients and methods

This two-arm, nonblinded interventional study (randomized controlled trial) was conducted between April 2018 and October 2019. In all, 45 patients were involved in this study and were randomly divided into two groups. Group I (SNP via tube thoracostomy, SNP group) including 21 patients and group II (modified IPC, IPC group) including 24 patients.

Findings

All enrolled patients had either moderate or massive pleural effusions. The majority of cases (61.9% of the SNP group and 69.6% of the modified IPC group) had successful pleurodesis. Mean hospital stay was significantly lower among the modified IPC group in comparison to the SNP group. The modified IPC group had a significantly higher chest pain score and higher dyspnea score at 1-month postprocedure in comparison to the SNP group.

Interpretation

SNP via intercostal tube and modified IPC pleurodesis for the management of recurrent symptomatic MPE were nearly equally effective with a high success rate and low tolerable complications. Both methods were safe and inexpensive in the achievement of pleurodesis. Modified IPC pleurodesis had the advantage of a single-day procedure and shorter hospital stay.
Assessment of different diagnostic modalities for the detection of ventilator-associated pneumonia
Authors: El-Shinnawy Olfat Mostafa , Abd El-Hadi Mohamed M. , Rashed Heba G. , Mahmoud Nermeen A. , Mahmoud Sahar R.
Published: May 2022

Background

Ventilator-associated pneumonia (VAP) is one of the common causes of nosocomial infection. The diagnosis of VAP is subject to marked interobserver variability. The clinical pulmonary infection score (CPIS) is simple, easily applicable and affordable, but may lead to overestimation and unnecessary use of antibiotics and hence microbiological resistance. However, at least 48 h are needed for definitive diagnosis using the microbiological methods, which may lead to delay in starting treatment. The best diagnostic method for the diagnosis of VAP remains unclear. Therefore, there is a great need for a definitive and simple method for the early detection of VAP.

Aim

This study aimed to assess the accuracy of different diagnostic tests for the early detection of VAP.

Results

In terms of the microbiological diagnosis of VAP, we isolated the same organism by protected endotracheal aspirate (EA) and bronchoalveolar lavage in about 76% of patients. The diagnostic performance of CPIS combined with EA gram stain was better than use of CPIS alone, with an area under the curve (AUC) of 0.81. The VAP lung ultrasound score (VPLUS) had a sensitivity and specificity of 70% at cutoff point more than 2, with an AUC of 0.71. Combining CPIS with VPLUS yielded the best diagnostic performance, with the sensitivity and specificity being nearly 85% at CPIS more than or equal to 8+VPLUS more than or equal to 2, AUC 0.92.

Conclusions

LUS is a very promising tool that aids in the diagnosis of VAP based on identification of specific sonographic features. However, it cannot replace microbiological sampling. The combination of clinical or ultrasound findings with gram stain yielded the best diagnostic performance.
Adenosine deaminase activity in serum and pleural fluid of patients with tuberculosis and those without tuberculosis
Authors: Salam Hany M. , Abdel-Hamid Hossam M. , Mostafa Yasser M.
Published: May 2022

Background

Adenosine deaminase (ADA) has been considered as a marker for cell-mediated immunity. The purpose of this study is to evaluate the usefulness of ADA as a biomarker in diagnosis of pleural effusion in tuberculosis (TB).

Patients and methods

Forty patients from Abbasia Chest Hospital who were suspected to have exudative pleural effusion and prepared for pleural biopsy were enrolled in the study. ADA in pleural fluid and serum was measured for all of them, and then data were reported and analyzed.

Results

Of the 40 patients included in the study, most of the 20 patients with TB pleurisy were diagnosed mainly by thoracoscope (16/20), whereas the rest four cases were diagnosed by sonar-guided biopsy. The other 20 patients, diagnosed as non-TB pleural effusion (6/20), mesothelioma (8/20), pneumonia, and adenocarcinoma (6/20). There were significant statistical difference between both groups regarding age, total leukocyte count, erythrocyte sedimentation rate, and tuberculin skin test, whereas no significant association regarding sex, clinical presentation, and radiological finding within any groups. ADA in effusion, serum, and index had a significant statistical difference between the two groups, with cutoff point value in effusion and serum of ∼31.4 and 29.5 U/l, respectively, and 1.1 for the index, with sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of ∼100, 90, 90, 100, and 95%, respectively, for ADA in effusion and serum, whereas for the index of ∼80, 65, 69, 76, and 73%, respectively.

Conclusion

Serum and pleural fluid ADA level significantly increases in patients with TB pleural effusion than non-TB pleural effusion with higher sensitivity, specificity, positive predictive value, negative predictive value, and accuracy in prediction.
Clinical Profile and Diagnosis of Tracheal Bronchus Among Patients Undergoing Fiberoptic Bronchoscopy in a Tertiary Level Health Facility
Authors: Shivashankaran Sanjeev , Prakash Sourabh M. , Shyvin K. S. , Kesavan Sreelakshmi , Chetambath Ravindran
Published: May 2022

Background:

Tracheobronchial anomalies are rare clinical entities and often asymptomatic in nature. Some patients may experience symptoms such as cough, recurrent pneumonia, or hemoptysis. Tracheal bronchus is one of the rarer forms of tracheobronchial anomalies, which may be seen during routine bronchoscopy. Knowledge and understanding of tracheal bronchus is important for diagnosing symptomatic patients and performing certain procedures, including bronchoscopy and endotracheal intubation.

Objective:

The objective is to study the clinical profile, diagnosis, and management of tracheal bronchus detected during routine bronchoscopy in a tertiary care setting.

Methods:

This study was a retrospective analysis of hospital data of patients undergoing fiberoptic bronchoscopy for 2 years in a tertiary care setting.

Results:

There were 150 bronchoscopies performed during the period. A total of 42 anomalies were detected in 35 (23.33%) patients. Three patients had tracheal bronchus (2%).

Conclusions:

This retrospective study evaluated the presence of tracheal bronchus among patients who underwent bronchoscopy in a tertiary care hospital in Kerala, India. This study revealed that tracheal bronchus was present in 2% of all bronchoscopies done during that period.
Uniportal video-assisted thoracoscopic surgery in semi-prone position utilising direct endobronchial intubation for oesophagus leiomyoma excision
Authors: Rajan Shiv , Akhtar Naseem , Kumar Vijay , Arya Sugandha , Tiwari Tanmay , Kannojiya Durga Prasad
Published: May 2022

Leiomyomas are the most common benign tumours of oesophageal smooth muscle origin. In this era of constantly evolving medical technology, video-assisted, robot-assisted and endoscopic approaches are the minimally invasive strategies for the excision of these lesions. Here, we report our modification of this surgery. The lesion was excised with uniportal video-assisted thoracoscopic surgery in a semi-prone position with single-lumen endobronchial intubation.
Mean convex properly embedded $[\varphi,\vec{e}_{3}]$-minimal surfaces in $\mathbb{R}^3$
Authors: Martínez Antonio , Martínez-Triviño Antonio Luis , dos Santos João Paulo
Published: May 2022

We establish curvature estimates and a convexity result for mean convex properly embedded

[\varphi,\vec{e}_{3}]

-minimal surfaces in

\mathbb{R}^3

, i.e.,

\varphi

-minimal surfaces when

\varphi

depends only on the third coordinate of

\mathbb{R}^3

. Led by the works on curvature estimates for surfaces in 3-manifolds, due to White for minimal surfaces, to Rosenberg, Souam and Toubiana for stable CMC surfaces, and to Spruck and Xiao for stable translating solitons in

\mathbb{R}^3

, we use a compactness argument to provide curvature estimates for a family of mean convex

[\varphi,\vec{e}_{3}]

-minimal surfaces in

\mathbb{R}^{3}

. We apply this result to generalize the convexity property of Spruck and Xiao for translating solitons. More precisely, we characterize the convexity of a properly embedded

[\varphi,\vec{e}_{3}]

-minimal surface in

\mathbb{R}^{3}

with non-positive mean curvature when the growth at infinity of

\varphi

is at most quadratic.
Gender Accessibility to Agricultural Production Resources amongst Rural Farmers in the North-Eastern Nigeria
Authors: Aliyu M.K. , Ibrahim A.L. , Garuba H.S. , Umar A.M. , Muhammad K. , Lawal A. , Lawal A. , Qasim O.H.
Published: May 2022

This paper reviewed gender issues on accessibility to agricultural production resources and extension services amongst rural farmers in the predominant crises regions of North-East Nigeria, The study applied qualitative analysis in reviewing related literatures, workshop proceedings, seminars, intervention projects, and situation reports on the crisis-torn regions of the Country to elicit cogent facts and figures, The findings revealed that there is a great deal of gender disparity in favour of the men folk as against women and youths in the accessibility to production resources and extension services in the affected regions of the study. This has not only affected their production output but also makes them vulnerable in crisis situations. The paper thus recommends strongly for gender mainstreaming policies towards ensuring equitable access to production resources and extension services in periods of emergencies in these regions. The aftermath is for sustainability in Agricultural production and improvement in rural livelihood to guarantee food security.
Modeling and Control for Rail Vehicle with Comfort Evaluation
Authors: Graa Mortadha
Published: May 2022

Investigation of control vibration is an important topic for the purposes of ride comfort in railway engineering. The vibration of rail vehicles becomes very complex because it is affected by the condition of vehicles, including suspensions and wheel profile, condition of track sections, including rail profile, rail irregularities, cant and curvature. The present study deals with the modeling and control for vertical active suspension rail vehicle by PID-ZN controller. A model of 17 degrees of freedom is adopted which consists of one car body 2 bogies and 4 wheel-sets. A Sperling ride index (ISO2631) is calculated using filtered RMS accelerations in order to evaluate the ride comfort. It should be noticed that the control model was carried out to improve Wz index about 41% at speed of 60 m/s.
Determination of a Mathematical Model of Taper Wear for a Longitudinal Surfacing Operation
Authors: Zouambi L. , Bourdim M. , Beida M. Djilali , Kerrouz S. , Oudad W.
Published: May 2022

Turning is one of the most widely used machining processes in the mechanical engineering industry. Thus, the choice of optimal cutting parameters (cutting speed, feed and depth of cut) is very important in order to ensure a better surface condition of the machined parts and the life of the cutting tools, which requires great relationship with the wear of the tool-part interface. The result of a good choice of cutting conditions can be seen by a reduction in this wear. During machining, the geometric shape and the physical state of the tool are modified by the combined action of the cutting forces and by the temperature reached by the cutting edge. These modifications which gradually increase with the duration of machining are commonly grouped under the term wear of the tool. They appear on the active part of the tool. In this work, we propose an optimization method allowing determining a mathematical model of the wear and tear by applying the experiment plan. This model highlights the relationship between the elements of the cutting regime (cutting speed, feed and depth of passes) and the responses studied (Wear in clearance).
A Decision Tree Algorithm for Financial Risk Data of Small and Medium-sized Enterprises
Authors: Yan Jun , , Liu Hui
Published: May 2022

With the advent of the era of big data, although enterprises have certain strategic choices in the process of active early warning of financial operational risks, the effect of financial risk early warning method is not obvious due to lack of understanding. This paper will apply the idea of decision tree algorithm to the construction of financial risk management model, give full play to the advantages of big data, and try to digitize useful information, so as to find leading indicators to make early warning of financial crisis and control risks as soon as possible. The financial risk early warning management system based on decision tree algorithm can effectively and accurately prevent the financial management risks of enterprises, and effectively avoid the possible financial management risks in the process of business development. When the decision-making problem is in multi-stage and multi-level, the decision tree algorithm can conveniently express the correlation and mutual influence between each stage decision-making and the overall decision-making. When using the decision tree algorithm, we should collect data extensively, consult relevant experienced experts and managers, and repeatedly check and modify the probability distribution, so as to provide a reliable basis for financial decision-making of enterprises.
La politique environnementale des grandes puissances dans le bassin du Congo
Authors: POUNTOUGNIGNI NJUH Ludovic Boris
Published: May 2022

Alors que les grandes puissances se présentent comme les mécènes de la transition écologique, il y a lieu de questionner les éléments qui ont changé dans leurs interventions dans le bassin du Congo, partie de l’Afrique dont les relations économiques ont été scellées avec les pays du Nord sous le sceau de la ponction au le tournant du 19e siècle. En effet, quels ont été les traits majeurs de ces accords ainsi que les enjeux des attitudes développées par les pays industrialisés dans le bassin du Congo depuis le 19e siècle? Sous les exigences de la transition écologique, les grandes puissances ont inscrit leurs politiques dans une trajectoire ambivalente – renouvellement vs statu quo – à l’égard de la biodiversité du bassin du Congo. L’article passe au crible de l’analyse, en s’appuyant sur la grille séquentielle d’analyse des politiques publiques et la policy transfer study, pour mettre en lumière l’attitude des puissances coloniales vis-à-vis de la diversité du bassin du Congo, puis les dynamiques de mise en retrait au lendemain des indépendances. L’analyse des dynamiques contemporaines de la politique environnementale des grandes puissances suggère l’opportunité de l’accroissement du rôle des Organisations de la société civile ou non gouvernementales dans la solidarité agissante au profit du « second poumon de la planète ».
La perception de la justice climatique dans les régions les plus vulnérables et à faible capacité d’adaptation au changement climatique : le cas de l’Afrique subsaharienne
Authors: ZAMBO Yanick Hypolitte
Published: May 2022

Sans conteste, le changement climatique dû à l’augmentation de la concentration des gaz à effet de serre n’épargne aucune sphère géographique de la planète. Toutefois, il s’avère que certaines régions sont plus impactées que d’autres. C’est certainement dans cette perspective qu’il faut situer la vulnérabilité de l’Afrique subsaharienne au regard de la précarité des moyens d’adaptation. Cette sous-région estime qu’elle est victime d’une situation à laquelle elle n’a point de responsabilité et que celle-ci revient aux pays développés. Manifestement, cette considération connotant leur perception de la justice climatique, présente des limites. En substance, les pays du Sud mettent en exergue les mesures d’adaptation au détriment de celles relatives à l’atténuation. Ainsi, leurs aspirations dans les négociations climatiques sont portées sur le transfert de technologies, les financements et le renforcement des capacités. Cette traduction de la dette écologique des pays industrialisés a pour leit motiv la garantie du développement des pays du Sud. La position africaine fait face à l’opposition des pays développés. Ceci marque la différentiation dans le régime climatique et la discorde dans les négociations climatiques. La différentiation est considérée par les pays en développement comme un mécanisme de compensation, de responsabilité et de justice. Compte tenu du caractère global du défi climatique, il est fondamental d’assurer une approche inclusive à travers surtout la mobilisation des principes éthiques.
Omics technologies in the diagnostics of Mycobacterium tuberculosis
Authors: Bespyatykh JA , Basmanov DV
Published: May 2022

Tuberculosis, caused by Mycobacterium tuberculosis, remains a global burden on our country and entire world. According to the World Health Organization, 10 million incident cases of tuberculosis were registered in 2019. A steady increase in the drug-resistant tuberculosis aggravates the situation and appears to be the major obstacle to the fight against the disease. A thorough understanding of the pathogen physiology and virulence properties is extremely important for the development of new diagnosis methods and treatment strategies. Multiomics approaches to studying the infectious agents are indispensable in understanding the nature of the disease. Despite the availability of sufficient genomic and transcriptomic data, pathogenic potential, survival rate, persistence, immunomodulation, mechanisms underlying drug resistance and host–pathogen interaction remain poorly understood. The use of proteomic approaches has been more informative, and provides more information about the true state of the cell in various conditions. Proteomic and bioinformatic approaches helped considerably in identification and characterization of target proteins that could be used for the development of new therapeutic options. Nevertheless, OMICs data integration with simultaneous use of the system approach to studying various clinically significant mycobacterial strains makes it possible to increase knowledge about the disease mechanisms and infection control methods. The review outlines various OMICs technologies and their role in the development of the M. tuberculosis diagnostic panels.
Do Pakistani English writers hedge more in linguistics research than native English writers?
Authors: Shafqat Asmara , Memon Rafique Ahmed , Khan Tafseer Ahmed
Published: May 2022

The purpose of this corpus-based study is to compare the use of hedges and associated linguistic constituents in the linguistic research articles authored by Pakistani English Writers (PEWs) and native English writers (NEWs). NEWs hedge more than their PEWs peers, as per the outcomes of the two corpora (20 linguistics research articles by PEWs and 20 linguistics research articles by NEWs). Nevertheless, the statistics revealed that both corpora employed hedging types that were quite similar. To minimize the legitimacy of their assertions and arguments, both factions relied primarily on lexical and hedging strategies, and both groups avoided utilizing hedges such as adverbs of frequency. Likewise, neither group used epistemic nor possibility hedging much. Nonetheless, the use of linguistic elements of hedging by PEWs and NEWs authors differ considerably. PEWs are more committed to their opinions being more appealing and persuasive, owing to the clear impact of first language and culture.
MODEL BIMBINGAN KLASIKAL DENGAN MENGGUNAKAN MEDIA CYBER COUNSELING (GOOGLE SITES) DALAM PERKEMBANGAN PEMILIHAN KARIER PESERTA DIDIK KELAS IX DI SMP NEGERI 5 SUNGAI LILIN KABUPATEN MUSI BANYUASIN
Authors: Risca Alvina Yuliani  , Fifi Yasmi  , Joni Adison
Published: May 2022

The study in the background is that learners select undesirable career pathways and talents that discourage them from learning. The purpose of this study is to describe: 1. Describe the development of the student career choices. 2. Makes up a classification guide by using cyber-counseling (Google sites) to enhance the development of careers of participants by guidance teachers. The study was conducted using a quantitative method. The sample extraction technique USES samples used for the study to use adhesive samples with 58 learned packets divided into instruments used in the study is angkettes by data analiis techniques using percentages. The results of this study found: 1. Profile of the development of the study of the career learners are in the low category. 2. Model Design of the classical guidance service by using Cyber Counseling media (GOOGLE SITES) To improve the development of career election has been done by Master BK, then the researcher hopes that BK teachers can apply the classical guidance model using the Cyber Counseling Media in the development of the selection of Classical E-Classical Classes at SMP Negeri 5 Sungai Lilin. This research is recommended to Master BK to use Cyber Counseling Media (Google Sites) for classical guidance.
A Preliminary Study on Learners’ Perception on Out of Class Autonomous Vocabulary Learning Strategies
Authors: Nayan Surina , Mohd Rawian Rafizah
Published: May 2022

The current study tries to explore learners’ perception of out of class autonomous vocabulary learning strategies.  The respondents were from one tertiary institution in Malaysia from the Diploma in Plantation and Industrial Management program.  Questionnaires were distributed via the google classroom platform to 30 students because of the covid 19 pandemic where classes were conducted online.  Data gathered were analysed using descriptive analysis based on percentages.  Online distance learning (ODL) has taken place during this pandemic.  Findings show the three most preferred ways to find meanings of the unknown words outside of class time are checking the meanings of the words, reviewing the new learnt words and encouraging themselves to speak in English using the words. On the other hand, the least preferred strategy is going to the access center or library or consulting online sources.  As the findings show, it is vital for learners to be autonomous since some courses will still be conducted on-line even when the cases of covid 19 reduce later.  By being autonomous learners will not depend a lot on lecturers and activities conducted in the classroom as time spent in the classroom is limited.
Analysis of the spread of drug trafficking crime (crystal trade) in the Baghdad city for the period of 2020 using remote sensing techniques
Authors: Al-Ramahi Fouad K. Mashee
Published: May 2022

The purpose of the research is to study the phenomenon of the increasing spread of the drug trade and its control in order to protect against its spread and increase its trade in Baghdad, through the use of remote sensing techniques and geographic information systems programs and measuring the extent of the development of this phenomenon to reduce and control it and predict its spatial spread within the geographical space and the city of Baghdad and the population density of the number of traffickers In the case of weak measures to prevent and combat organized crime, and to produce maps of the distribution of this crime in order to limit its spread and take the necessary measures to control it, this issue has been addressed through GIS version 4.01, as one of the tools that helps decision makers to take appropriate decisions in the right time. The areas in which the activity of drug dealers will spread and according to the ratio between the numbers of drug dealers to the population of Baghdad, which is 8500 million, was reached. The highest value was from 119 to 202 in the areas of Dora, Bab Al-Sharqi, Bab Al-Muadham, Al-Shaab and Al-Husseiniya areas. As for the rest of the areas, they varied with less severity, ranging in value from 12.1 to 118. As for the ratio between the areas registered with the activity of drug dealers to the area of the city of Baghdad. Our study predicted the highest value from 13.46 to 23.07, the expected areas were Al-Sadr City, New Baghdad and Bab Al-Muadham, while the rest of the values ranged between 1.413 to 13.45, and they are subject to several factors for reasons of spread or not according to the programs set to reduce drug trafficking.
Impact of transformational leadership practice on management of secondary schools under zhemgang dzongkhag
Authors: Rinchen Pema
Published: May 2022

Bhutanese principals faced several challenges in course of their jobs. This has led to managerial issues and mismanagement at schools. The impact of principals’ transformational leadership practice on the administration of Bhutanese schools is discussed. The study had three goals: to investigate the impact of principals’ TLP on teachers’ commitment; to determine the impact of principals’ TLP on school physical resource management; and to determine the impact of principals’ TLP on school financial resource management. Transformational leadership theory, which elucidates what leaders do to attain bigger magnitudes of growth in their institutions, served as the theoretical basis. The study employed a descriptive survey research approach. The study’s target population is 10 Bhutanese secondary school administrators (Principals) and 110 teachers. Questionnaires for teachers, focus groups for teachers, and interview schedules for principals were employed to collect data. The research produced both qualitative and quantitative information. The findings demonstrated that principals’ TLP had a favorable link with teachers’ commitment, physical resource management, and instructional material resource management in schools under Zhemgang Dzongkhag. The study’s findings are expected to show that teachers perform better as a result of being motivated, inspired, and appreciated; students perform well as a result of a positive learning environment; and principals have an impact on the commitment of subordinate staff to work and the upkeep of school resources.