bluuebunny/crossref_metadata_2025 huggingface dataset:
A Web-Based “Department Management System” for Academic Institutions
Authors: Rohini Kulkarni , Aditi Shelke , Rutuja Mane , Shruti Kulkarni , Kulkarni Prof. D.P.
Published: May 2024

This work done is pointed toward fostering a web-based Online application "Division The executives Framework" that is of significance to explicit branch of school. The framework is electronic application that can be gotten to all through the division of an association. This framework might be utilized for checking the general exercises as well as execution of the understudies. This work is being produced for a designing to keep up with and work with simple admittance to data. For this the clients should be enrolled with the framework after which they can access as well as alter information according to the consents given to them. DMS is an online application that targets giving data to every one of the degrees of division in an association. For a given understudy/personnel can get to the framework to either transfer or download some data from the information base.
Prospects and strategies for enhancing Phosphorus efficiency in Soybean production in the Nigerian savannah Regions: A review
Authors: Adeshina D.A. , Adeboye S.E. , Garba H. , Hanis B. , Osisami O.F. , Ighedosa E.
Published: May 2024

Low crop production negatively affects most farming systems in Sub-Saharan Africa (SSA). Grain legumes like soybeans (Glycine max (L.) Merrill) tend to have lower yields in SSA due to various biological and environmental factors. Soybean is susceptible to low soil Phosphorus (P) levels and requires large amounts of P for adequate biological nitrogen fixation through its root nodules. Unfortunately, most small-scale African farmers face difficulties affording the exorbitant costs of mineral fertilizers as over 75% of the fertilizers used are imported, which puts a significant strain on local currencies. This research study has examined previous and ongoing interventions in phosphorus application, explicitly focusing on soybean cultivation in the savannah ecological zones of Nigeria. The aim is to identify the most effective ways to advise farmers on enhancing production and encouraging the adoption of efficient Phosphorus application methods to achieve optimal yields in the face of climate change challenges. The study's significant findings include the following key points: (1) Understanding the crop's morphology to guide appropriate varietal selection. (2) Identifying the soil qualities necessary for successful Soybean cultivation. (3) Determining the appropriate rate of Phosphorus application for optimal results. (4) Selecting the most efficient method of Phosphorus application. (5) Timing the application of Phosphorus correctly to maximize its effectiveness.
Productivity and Cost Analysis of Chinese Cabbage (Brassica rapa) in Hydroponic Wick System Based on Formula
Authors: Nurkholis Nurkholis , Tian Anas , Sutanto Adi
Published: May 2024

Organic fertilizers have emerged as a vital alternative to address the environmental and human health concerns associated with the use of inorganic fertilizers. This research aims to develop the right nutrient formula for cultivating Pak Choi (Chinese cabbage) using the Wick hydroponic system. Considering factors such as variety selection, cultivation system, and nutrient requirements, this study explores the productivity of Pak Choi plants and the cost structure of cultivation. The research methodology involves testing various nutrient formulas and observing post-harvest plant metrics like wet weight, leaf width, leaf count, and plant height. Descriptive analysis and ANOVA tests reveal significant differences among treatments in plant morphology. Furthermore, cost analysis highlights the efficiency and profitability of each treatment, with Treatment F3 emerging as a cost-effective option with low expenses and good gross profit. These findings offer practical guidance for farmers to enhance vegetable production economically and sustainably in hydroponic cultivation.
A Review of Chinese Political Literature Translation Studies since the New Era
Authors: Yao Peng , Shuangyu Chen
Published: May 2024

In this paper, we analyze the core journals of the past ten years with the subject terms "political literature" plus "translation","political literature" ,"English translation" on China National Knowledge Infrastructure (CNKI). "I have analyzed the characteristics on translation of political literature during 2012-2022 from the aspects of practical experience, multi-perspective research and national image construction, and look forward to the development of English translation of political literature, hoping to provide various types of reference information for it.
Web Scraping Application for E-Commerce Website
Authors: Chavan Prashant
Published: May 2024

Abstract: In the rapidly evolving digital world, efficient extraction of data from the web is essential for insights and decision making. This project introduces a versatile web scraping solution by integrating Superagent and Puppeteer. Superagent efficiently handles HTTP requests and static content, while Puppeteer excels in dynamic web page interactions. The combination of their capabilities forms a robust approach for navigating and scraping modern websites. The resulting tool enables seamless extraction of both static and dynamic content, providing researchers, analysts, and businesses with a powerful tool to acquire structured data from diverse web sources, facilitating data-driven decisions and research across multiple domains. The combined power of these libraries offers an end-to-end solution for automating data extraction and integration. It also emphasizes on ethical considerations
Unlocking Creative Potential: Sustainable Art Practices Through Scrap Art and SCAMPER Design Innovation
Authors: Jain Yash
Published: May 2024

Abstract: In today's consumer-centric world, rapid technological progress has led to an alarming increase in discarded items, posing a significant environmental threat. This situation underscores the pressing need for embracing sustainable practices in artistic endeavors. Many contemporary artists are now turning to "Scrap Art" or "Junk Art," creating stunning pieces from discarded materials, not only beautifying their surroundings but also raising awareness about reuse. This paper delves into the detrimental impact of rampant consumerism on the environment and advocates for repurposing and upcycling waste materials in art. It outlines a four-stage design process: selecting waste products, developing concepts, generating ideas, and creating a series of innovative designs. The SCAMPER technique, known for its effectiveness in generating creative ideas, was applied during the concept development and idea generation stages. Through this methodology, the study showcased how waste soft drink cans could be transformed into five distinct products: a desk watch, a picture frame, a spring paper clip, a pencil holder, and a lamp. These creations not only demonstrated the potential of upcycling but also reduced the need for recycling or landfill disposal. The research emphasizes the compatibility of the design process with creative concept generation and highlights the importance of sustainable art practices in mitigating environmental challenges. By unlocking the creative potential of upcycling and addressing environmental concerns, this study aims to contribute to a more sustainable and vibrant artistic landscape, benefiting both artists and the environment.
Wi-Fi Based Multipurpose Agri-bot
Authors: Bhorge Prof. Siddharth
Published: May 2024

Abstract: The proposed Agribot represents a technological advancement in Indian agriculture, aiming to address labor-intensive manual farming methods. This Wi-Fi-based multipurpose agribot helps in efficient spraying of fertilizers and weed removal, with the ultimate goal of enhancing crop yield while reducing manual labor costs. The literature review highlights the transformative impact of Agribots on various farming tasks, emphasizing their potential to revolutionize agriculture and contribute to global food security. The hardware setup(ESP8266) is complemented by software algorithms, Blynk configuration, and user-friendly interfaces for remote control.
Work Motivation and Organizational Commitment among IT Employees
Authors: CH Harsha
Published: May 2024

Abstract: This study explores the dynamics of work motivation and organizational commitment among IT employees, focusing on gender differences. Contrary to common beliefs, the analysis reveals no significant correlation between work motivation and organizational commitment among IT employees. Moreover, significant gender disparities are observed in both organization commitment and work motivation levels. Male employees demonstrate higherlevels of organization commitment but lower work motivation compared to their female counterparts. These findings underscore the complexity of workplace dynamics and highlight the need for a nuanced understanding of motivational factors within the IT sector. Factors such as societal norms, organizational culture, and individual characteristics contribute tothese observed differences, necessitating further exploration in future research.
Talent Acquisition: A Win-Win Situation for Recruiters and Employees
Authors: Sharma Dr. Pooja
Published: May 2024

Abstract: The objective of drafting this research paper was to give a glimpse of how technology and talent acquisition have intertwined. It also covers the procedure of talent acquisition. The research has been done till depth about the topic to study about its impact on organizations, cognitive assessments, and incorporated technology in realm with human resources. The research methodology includes in depth secondary research related to the topic. It also gives a clear picture of how it is a winwin situation for the recruiters and employees at the global level.
Kidney Stone Detection and Stone Analysis Using Image Processing
Authors: Paka Mr. Narasimha Raju
Published: May 2024

Abstract: The primary goal of the project is to detect the kidney stone from the digital ultrasound image of the kidney by performing various image processing techniques. Due to the varied texture and existence of speckle noise, detecting regions of interest in ultrasound pictures is a difficult process. Ultrasound scanning is the most common method of examining a patient for the presence of kidney stones. We created an application that aids the medical practitioner in selecting the region to be evaluated can also referred to as renal calculi using the suggested technology. The feature extraction is done on cropped portions that may have stones in them. The KNN classifier is accustomed to categories images based on training data.
Automated Air Purifier Robot
Authors: Goel Keshav
Published: May 2024

Abstract: Growing air pollution has become a major worry for all countries since the advent of industrialization and modernity. Each person's health is affected differently by air pollution, which can lead to serious consequences. The largest environmental health concern in the world is air pollution, particularly indoor air pollution, which is connected to over 4 million deaths a year from conditions like lung cancer, ischemic heart disease, stroke, and chronic obstructive pulmonary disease.. The air inside our homes and workplaces can become contaminated with dangerous pollutants as cities and industries grow. This is where air purifiers become crucial, and new developments have introduced autonomous air purifier robots as a new player in the field. These robots are not your normal stationary air purifiers; instead, they move around and clean the air using cutting-edge technologies like robotics, artificial intelligence, and sensors. These robot air purifiers are more dynamic than typical air purifiers because they can adjust to changing indoor settings. The objective of this review paper is to examine autonomous air purifier robots, including their history, essential technological elements, uses, and possible effects on indoor air quality. We want to comprehend the benefits, constraints, and distinct issues these robotic solutions tackle when compared to traditional air purifiers by looking at the state of the art. We will also talk about user experiences, upcoming trends, and the moral issues surrounding the use of these self-governing systems
Switchable Solar Powered Batteries for Electric Vehicles
Authors: Giri Arundhati
Published: May 2024

Abstract: This paper explores the concept of utilizing solar power for charging batteries that can be switched as per need while operating an electric vehicle. The paper discusses the advantages of solar power as a renewable energy source and its potential to revolutionize the way we charge batteries. By examining the current technology and trends in solar power and battery storage, the paper highlights the feasibility and benefits of using solar power for charging batteries that can be easily switched based on demand. The potential applications and implications of this technology in various industries are also discussed. Overall, this paper aims to shed light on the innovative approach of combining solar power and battery technology for sustainable and efficient energy storage solutions.
Design and Analysis of Composite Rocket Motor Casing
Authors: Mohatkar Shubham D.
Published: May 2024

Abstract: Rocket motors are widely employed to provide thrust, or impulsive force, which gives the flight vehicle a chosen velocity and facilitates delivery to the intended destination. Newton's second and third principles make up the majority of the rocket motor's operating principle. As a non-air inhalation propulsionclass, rocket motors do not require atmospheric oxygen for the combustion of the fuel that is stored inside of them. The motor hardware is going to be exposed to high temperatures and pressure loads during operation. In order to verify the rocket motor's temperatures and stress levels, structural and thermal design must be completed for the specified input parameters. This study has been approved for publication with structural
Comparative Study of Response of Staad.Pro Model with and Without Modeling Plate Element Considering Plan Irregularity: A Review
Authors: Ansari Mr. Aaquib
Published: May 2024

Abstract: Nowadays, modelling is done on a lot of software in the world, and in India, some of the software is used among all other software. In this research, we have compared the outcome of the different software including STAAD.Pro and ETABS analysis. Many researchers have made efforts to get the best possible results. But our motive is to model plate elements by considering regular and irregular structures to achieve the best possible results. We are going to compare the structure based on maximum storey Displacement, Axial Forces, overturning moments and shear criteria.
Measurement of Temperature, Humidity and Dust Using IoT
Authors: B Yuvaraj
Published: May 2024

Abstract: Humankind, moving to a period centered upon improvement has overlooked the significance of supportability and has been the real guilty party behind the rising Pollution levels in the world's air among all other living life forms. The Pollution levels at certain spots have come to such high degrees that they have begun hurting our very own It will being. As age of poisonous gases from ventures, vehicles and different sources is immensely expanding step by step, it winds up hard to control the dangerous gases from dirtying the unadulterated air. In this project a practical air Pollution observing framework is proposed. This framework can be utilized for observing Pollutions in demeanor of specific territory and to discover the air peculiarity or property examination. In this proposed system, we are monitoring the air by using arduino board & temperature and humidity sensors. Here we are using adapter for power supply even you can use 2amp transformer. Humidity sensors, temperature sensor, Wi-Fi module is ESP32 and LCD display these are also the hardware parts of this projects. By using temperature sensor we can monitor air temperature. then whatever temperature may read by sensor that will be displayed on LCD. Even the temperature & humidity will be displayed on LCD. This entire data can be uploaded over server through WI-FI module. Depending on the delay the above cycle is repeated.
Design of Rocket Engine Nozzle Using Method of Characteristics
Authors: Tarnacha Dr. R. S.
Published: May 2024

Abstract: This report focuses on the design of a 2D theoretical layout of a rocket engine nozzle. Convergent and divergent are to be designed separately with the focus on divergent part for a minimum length nozzle. The divergent part is to be designed using method of characteristics with left and right running characteristics using the known (sonic) values at the throat of the convergent-divergent nozzle. These characteristics would be pressure, density, velocity and temperature. A computer code has been designed to calculate the values of these characteristics and the end characteristics at the exit. CFD analysis has also been carried out on the designed nozzle using commercial software ANSYS.
Sign Language Detection using CNN Model
Authors: Patil Prof. Kirti
Published: May 2024

Abstract: Sign Language is mainly used by deaf (hard hearing) and dumb people to exchange information between their own community and with other people. It is a language where people use their hand gestures to communicate as they can’t speak or hear. Sign Language Recognition (SLR) deals with recognizing the hand gestures acquisition and continues till text or speech is generated for corresponding hand gestures. Here hand gestures for sign language can be classified as static and dynamic. Deep Learning Computer Vision is used to recognize the hand gestures by building Deep Neural Network architectures (Convolution Neural Network Architectures) where the model will learn to recognize the hand gestures images over an epoch.
Survey of Techniques and Application in AR Integrated Home Furniture App
Authors: Singh Kartikeya
Published: May 2024

Abstract: This paper focuses on combining Augmented Reality technology with furniture stores to give customers the same shopping experience from the comfort of their homes. The mobile application uses the power of AR to allow users to place and view furniture in their positions in real time. Through a smartphone camera or tablet, users can see that there are many products available to add to their existing decor, such as a sofa, table, or chair, allowing them to make a purchasing decision. This AR furniture application not only simplifies the purchasing process, but also increases customer satisfaction by reducing the guesswork in the furniture purchasing process, and finally transforms the traditional rules of interior design into a conversational, interactive, and personal one. This paper studies the methodology and implementation of the AR app.
Literature Review on Experimental Analysis of Domestic Refrigerator
Authors: Ingle Dr. A. H.
Published: May 2024

Abstract: This literature review paper delves into the experimental analysis of the performance of domestic refrigerators, a cornerstone of modern household appliances. The review synthesizes a broad spectrum of studies that examine the efficiency, energy consumption, cooling capacity, and overall performance of various domestic refrigerator models. Key focus areas include the impact of different refrigerants, advancements in compressor technology, insulation materials, and the role of smart technologies in enhancing refrigerator performance. The review highlights experimental methodologies employed to assess refrigerator performance, such as standardized testing protocols, real-world usage simulations, and advanced diagnostic techniques. It also discusses the influence of external factors like ambient temperature, door opening frequency, and load variability on refrigerator efficiency. Comparative analyses within the literature reveal trends in energy efficiency improvements, driven by regulatory standards and consumer demand for environmentally friendly appliances. The integration of alternative refrigerants, such as R600a (isobutane), is examined for its environmental benefits and performance implications. The paper concludes by identifying gaps in current research and suggesting directions for future experimental studies. Emphasis is placed on the need for continued innovation in refrigeration technologies to meet growing energy efficiency and environmental sustainability requirements. Overall, this literature review provides a comprehensive overview of the experimental evaluation techniques and findings related to domestic refrigerator performance, offering insights that can guide future research and development in this vital field.
Electrostatic InkJet Printed Silver Grids for Non-vacuum Processed CIGS Solar Cells
Authors: Wang Mingqing , Pufinji Obene , Questianx Mikhail , Harris Mark , Singh Rikesh , Alexander Matthew S , Choy Kwang-Leong
Published: May 2024

Printed electronics (PE) technology shows huge promise for the
realisation of low-cost flexible electronics. Here, we demonstrate the
use of Electro-Static Inkjet (ESJET) printing technology to deposit
silver nanoparticle (Ag nps) inks for fabrication of grid electrodes for
non-vacuum processed Cu(In,Ga)S2 (CIGS) solar cells to bridge the gap of
additive printing between high viscosity screen printed materials and
low viscosity inkjet processes. The effect of printing parameters and
the sintering condition of the ESJET printed Ag grids were investigated
by the measurement of photovoltaic performance parameters of CIGS solar
cells. It was found that sintering temperatures of 220°C caused a
significant loss of performance in the CIGS cell however, sintering of
the Ag grids at temperatures up to 160°C produced a cells with good
performance and efficiency comparable to the test cells using thermal
evaporated Ag grids. Results from stability test (ISOS-D-1) shows the
efficiency of the CIGS solar cells with ESJET printed Ag grids decreased
from 11.14% to 10.44%, which is around 0.6% efficiency after 3 months
in air without any encapsulation. ESJET printing is a viable method for
production of PV metal grids which can minimize material waste and
enable significant cost reduction of thin film solar cells.
Endoscopic integrated multipoint laser system to perform quantitative measurements in endoscopic anterior skullbase surgery
Authors: Nuredini Gani , Parmar Priscilla , Hall Andrew , Navaratnam Annakan
Published: May 2024

Introduction: Measurements in endoscopic sinus surgery (ESS) are usually
obtained with variable accuracy. We aimed to validate endoscopic
multipoint integrated laser systems (EIMLS) for use in ESS, which can
acquire measurements within one-hundredth of a millimetre. Methods:
4.4mm flexible endoscopic EIMLS projecting 49 laser points into the view
was used to assess simulated anterior skullbase defects.
Antero-posterior and lateral measurements were obtained and repeated
twenty times by two surgeons. These were compared to measurements with
surgical calipers. Intra and inter-observer reliability was assessed.
Results: 80 measurements were obtained of simulated skullbase defects by
each otolaryngology surgeon and compared to manual measurements. The
mean difference shown was 0.56cm. Bland-Altman plot shows low bias
(0.044) but wide 95% limits of agreement (-1.8 – 1.9). Conclusion:
EIMLS allows reliable and easy to obtain measurements within a simulated
ESS environment. Translation of this technology offers promise in a
future clinical setting but will require further refinement to improve
accuracy.
Laryngeal ultrasound for evaluation of paediatric unilateral vocal fold immobility -- a retrospective cohort study in Aotearoa New Zealand and a survey of clinicians around the world
Authors: Marinone Silvia , Mackay Georgia , Clark Sita Tarini , Saniasiaya Jeyasakthy , McCaffer Craig
Published: May 2024

Objective: Vocal fold immobility (VFI) is a cause of significant
morbidity and mortality in the paediatric population. Laryngoscopy is
the current first-line investigation for patients with suspected VFI.
Laryngeal ultrasound (LUS) has recently emerged as an alternative method
of identifying VFI. Compared to laryngoscopy, LUS is less invasive, does
not require anaesthesia, and can be performed by non-otolaryngologists.
The primary objective of this study is to evaluate LUS as a diagnostic
method for the identification of unilateral VFI in a cohort of
paediatric patients in Aotearoa New Zealand (NZ). The secondary
objective is to estimate the frequency of use of LUS in the paediatric
population around the world. Methods: A retrospective, single-centre
cohort study was performed on all paediatric patients who had undergone
laryngoscopy and LUS at Starship Children’s Health between 2020 to 2023
in Auckland, NZ. An eight-question survey was also developed and
distributed to better understand clinicians’ use of LUS to diagnose
paediatric VFI globally. Results: Twenty-three paediatric patients met
the inclusion criteria. LUS demonstrated high sensitivity (100%),
specificity (63%), positive predictive value (83%), and negative
predictive value (100%) for detecting unilateral VFI within our patient
population. Out of the eighty-seven respondents to the survey, nearly
half utilise LUS in their clinical practice in the paediatric
population. The main barrier for those who do not is lack of expertise,
equipment, and training. Conclusions: These findings support the use of
LUS as a safe and accurate diagnostic tool for the detection of
unilateral VFI. Further studies in non-surgical populations and
standardised guidelines for LUS technique and reporting are required.
A hybrid model simulating multi-stage continuous fermentation of Saccharomyces cerevisiae
Authors: Zhu Huidong , Xia Jianye
Published: May 2024

The performance of industrial strains has gradually improved with the
rapid development of synthetic biotechnology. The production efficiency
of traditional batch and fed-batch culture is limited and product
quality varies since both are dynamic processes, whereas multi-stage
continuous culture can maximise the production efficiency of specific
fermentation processes and achieve consistent product quality. However,
each single-stage fermentation under multi-stage continuous fermentation
requires accurate steady-state control, and a model with adequate
accuracy is required for designing and controlling a multi-stage
continuous fermentation process. At present, there are few reports on
kinetic models for the control of multi-stage continuous fermentation.
In this work, we constructed a hybrid model for Saccharomyces cerevisiae
multi-stage continuous culture, taking both oxygen limitation and
Crabtree effect. The accuracy of the model was ~ 80%,
advantages and limitations of the model are discussed and potential
improvement strategy is proposed.
The exponential consensus of linear multi-agent systems with binary-valued measurements and Markovian switching topologies
Authors: Sun Xu , Ren Zhipeng , Wang Ting , Tan Guoqiang
Published: May 2024

This paper studies consensus of linear multi-agent systems with
binary-valued measurements and switching topologies. Unlike the existing
consensus of multi-agent systems with binary-valued measurements,
Markovian switching topology is introduced in this paper. A new
algorithm is proposed to improve the consensus speed of multi-agent
systems, with constant gains in both estimation and control, instead of
time-varying gains. By analyzing the estimation error and the consensus
error simultaneously, we prove that the proposed algorithm can make
agents achieve consensus in a bouned range, and the consensus speed is
negative exponential under certain conditions, which is faster than that
in existing literature. Finally, simulation results are given to
demonstrate the theoretical results.
The endophytic fungus Serendipita indica alters auxin distribution in Arabidopsis thaliana roots through alteration of auxin transport and conjugation to promote plant growth
Authors: Pollmann Stephan , Ortega-Villaizán Adrián González , King Eoghan , Patel Manish K. , Pérez-Alonso Marta-Marina , Scholz Sandra , Sakakibara Hitoshi , KIba Takatoshi , Kojima Mikiko , Takebayashi Yumiko , Ramos Patricio , Morales-Quintana Luis , Breitenbach Sarah , Smolko Ana , Salopek-Sondi Branka , Bauer Nataša , Ludwig-Müller Jutta , Krapp Anne , Oelmüller Ralf , Vicente-Carbajosa Jesús
Published: May 2024

Plants share their habitats with a multitude of different microbes. This
close vicinity promoted the evolution of inter-organismic interactions
between plants and many different microorganisms that provide mutual
growth benefits both to the plant and the microbial partner. The
symbiosis of Arabidopsis thaliana with the beneficial root
colonizing endophyte Serendipita indica represents a well-studied
system. Co-colonization of Arabidopsis roots with S. indica
significantly promotes plant growth. Due to the notable phenotypic
alterations of fungus-infected root systems, the involvement of a
reprogramming of plant hormone levels, especially that of
indole-3-acetic acid, has been suggested earlier. However, until now,
the molecular mechanism by which S. indica promotes plant growth
remains largely unknown. This study used comprehensive transcriptomics,
metabolomics, reverse genetics, and life cell imaging to reveal the
intricacies of auxin-related processes that affect root growth in the
symbiosis between A. thaliana and S. indica. Our
experiments revealed the essential role of tightly controlled auxin
conjugation in the plant–fungus interaction. It particularly
highlighted the importance of two GRETCHEN HAGEN 3 ( GH3)
genes, GH3.5 and GH3.17, for the fungus
infection-triggered stimulation of biomass production, thus broadening
our knowledge about the function of GH3s in plants. Furthermore, we
provide evidence for the transcriptional alteration of the PIN2
auxin transporter gene in roots of Arabidopsis seedlings infected with
S. indica and demonstrate that this transcriptional adjustment
affects auxin signaling in roots, which results in increased plant
growth.
The long-term oncopathology effects of COVID-19 infection and vaccination on the female reproductive system
Authors: Emtiazi Nikoo , Jahandideh Arian , Pashmchi Mohammad , Dashtbani Aidin , Alinezhad Armin , Fazeli Ramina , Gholizadeh Nasim , Asghari Zahra , Jesri MohammadHosein , Sharifi Zeinab , Lotfalian Hasti , Adereh Akhtar , Gohari Narjes Sadat Farizani , Moghaddamziabari Seyedehyasmin , Olangian-Tehrani Sepehr
Published: May 2024

Background: Since the COVID-19 pandemic started in 2019, has resulted in
various health conditions, including adverse effects on different
systems. The female reproductive system (FRS) is known to be one of the
organs affected by the virus or the vaccination due to its high
expression of the ACE 2 receptor, which is one of the primary receptors
of COVID-19 that facilitates its entry into the cells. This review
assessed the impact of COVID-19 infection and vaccination on the female
reproductive system and their relationship with endometrial, ovarian,
cervical, and vulvar cancers. Recent findings: COVID-19 virus may
elevate pro-inflammatory factors, such as TNF-α, IL-6, interleukin-1β
(IL-1β), and interferon-gamma (IFN-γ), during both the acute and
recovery phases of infection. COVID-19 infection can heighten the
inflammatory response and cell susceptibility by downregulating the
ACE-2 receptor. Additionally, COVID-19 influences the female
reproductive system by altering the epithelial-mesenchymal tissue
microenvironment and disrupting blood vessels and endothelial cells.
However, studies fail to acknowledge the potential impact of vaccination
on FRS. Conclusion: Given the pivotal roles of the TMPRSS2 enzyme and
ACE2 receptor in the pathogenic mechanism of the coronavirus, it is
suggested that cells expressing higher levels of these enzymes and
receptors may be more prone to endometrial cancer development. Notably,
the cytokine storm and ACE/ACE2 pathway imbalance increase the risk of
ovarian cancer. Cervical cells have a low expression of the ACE2
receptor, reducing the likelihood of infection in intraepithelial
cervical cells and cervical cancer. Although coronavirus infection and
its immunization can lead to vulvar aphthous ulcers, limited research
investigates the link between COVID-19 infection, immunization, and
vulvar cancer.
(p)ppGpp buffers cell division when membrane fluidity decreases in Escherichia coli.
Authors: Singh Vani , Rajendran Harinarayanan
Published: May 2024

Fluidity is an inherent property of biological membranes and its
maintenance (homeoviscous adaptation) is important for optimal
functioning of membrane-associated processes. The fluidity of bacterial
cytoplasmic membrane increases with temperature or an increase in the
proportion of unsaturated fatty acids and vice versa. We found
strains deficient in the synthesis of guanine nucleotide analogues
(p)ppGpp and lacking FadR, a transcription factor involved in fatty acid
metabolism exhibited growth defect that was rescued by an increase in
growth temperature or unsaturated fatty acid content. The strain lacking
(p)ppGpp was sensitive to genetic or chemical perturbations that
decrease the proportion of unsaturated fatty acids over saturated fatty
acids. Microscopy showed the growth defect was associated with cell
filamentation and lysis and rescued by combined expression of cell
division genes ftsQ, ftsA and ftsZ from plasmid.
The results implicate (p)ppGpp in the positive regulation of cell
division during loss of membrane fluidity. To our knowledge, this is the
first report of a (p)ppGpp mediated regulation needed for adaptation to
membrane fluidity loss in bacteria.
Service recipient’s monitoring of the micronutrient powder (MNP) consumption and perceived health status of young children in rural Bangladesh
Authors: Rahman Sabuktagin , Biswas Nezam Uddin , Ahmed Faruk
Published: May 2024

Background: Monitoring of the health programs is a growing
challenge and plagued by lack of resources, personnel, especially in the
resources-poor settings. Client’s self-monitoring of the services
consumption is a new concept in program implementation needing validity.
Client’s self-perception of the health status of their children is a
potential idea which needs assessment of the validity. Methods:
A cross-sectional study was conducted in a rural district in Bangladesh.
Mothers monitored their children’s daily consumption of micronutrient
powder (MNP) by checking in a paper-form supplied to them. Project
personnel reported the consumption by enumerating the empty sachets of
MNPs. The project personnel asked mothers a simple question inquiring
about the health status of their children over the preceding one week.
Data was collected on actual sufferings of health issues and medical
treatment received. Validity of client’s monitoring of MNP consumption
was assessed by correlation, kappa estimates and the Bland-Altman plots.
Client’s health perception of their children was assessed for validity
by sensitivity, specificity, positive predictive value, and
correct-classification analyses. Results: Spearman rho
coefficient was 0.44 between the mother’s and project’s monitoring of
MNP consumption. Kappa statistics for agreement was 0.3. Bland-Altman
plots showed 4.2% of the observations falling outside of the limits of
agreement. Mother’s reporting of the children being “sick/unwell”
predicted the occurrence of any illnesses in the children with 98%
sensitivity and 86.9% specificity. Conclusion: Service
recipient’s monitoring of service consumption and their assessment of
the health well-being of their children by asking a simple question is
valid and potentially a cost-containing monitoring tool in resources
poor settings.
Seed dispersal limitation causes negative legacy effect on restoration of grassland plant diversity on ski slopes
Authors: Yaida Yuki , Inoue Taiki , Tanaka Kenta , Ushimaru Atsushi
Published: May 2024

Past forest use often has a long-term negative impact on the recovery of
the original plant composition of semi-natural grasslands, which are
known as a legacy effect. This study investigates the impact of seed
dispersal limitations on the restoration of grassland plant diversity on
ski slopes with past forest use, highlighting the negative legacy effect
on biodiversity recovery. Focusing on ski areas, our research contrasts
the vegetation on ski slopes originally created on semi-natural
grasslands such as pasture (pasture slopes) and constructed by clearing
secondary forests or conifer plantations (forest slopes). We examined
species richness and abundance, considering seed dispersal mechanisms,
grassland management history and seed source proximity. We reveal that
the proximity to species-rich grassland sources and sustained management
for more than 50 years are pivotal for the restoration of native
grassland vegetation. Particularly, wind-dispersed species show
significant recovery on slopes with a history of extensive grassland
management, suggesting that both the duration of management and the
proximity to seed sources are critical for overcoming the legacy effects
of past forest use. Our findings emphasize the importance of considering
seed dispersal dynamics and management history in the restoration and
conservation of grasslands and their biodiversity, particularly in
landscapes experiencing past human intervention.
A generalization of complex, dual and hyperbolic quaternions: Hybrid quaternions
Authors: Dagdeviren Ali
Published: May 2024

Hybrid numbers are a new non-commutative number system which is a
generalization of the complex (i2 = ?1), dual (?2 = 0), and hyperbolic
numbers (h2 = 1). In this article, firstly we define a new quaternion system
called hybrid quaternions by taking the coefficients of real quaternions as
hybrid numbers. This new quaternion system is a combination of complex
quaternions (biquaternions), hyperbolic (perplex) quaternions, and dual
quaternions, and it can be viewed as a generalization of these quaternion
systems. Then, we present the basic properties of hybrid quaternions
including fundamental operations, conjugates, inner product, vector product,
and norm. Finally, we give a schematic representation of numbers and
quaternions.
The space of centered planes and generalized bilinear connection
Authors: Belova Olga
Published: May 2024

We continue to study the space of centered planes in n-dimension projective
space. We use E. Cartan?s method of external forms and the group-theoretical
method of G. F. Laptev to study the space of centered planes of the same
dimension. These methods are successfully applied in physics. In a
generalized bundle, a bilinear connection associated with a space is given.
The connection object contains two simplest subtensors and subquasi-tensors
(four simplest and three simple subquasi-tensors). The object field of this
connection defines the objects of torsion S, curvature-torsion T, and
curvature R. The curvature tensor contains six simplest and four simple
subtensors, and curvature-torsion tensor contains three simplest and two
simple subtensors. The canonical case of a generalized bilinear connection
is considered. We realize the strong Lumiste?s affine clothing (it is an
analog of the strong Norde?s normalization of the space of centered planes).
Covariant differentials and covariant derivatives of the clothing
quasi-tensor are described. The covariant derivatives do not form a tensor.
We present a geometrical characterization of the generalized bilinear
connection using mappings.
On the existence of a curvature tensor for given Jacobi operators
Authors: Andrejic Vladica , Lukic Katarina
Published: May 2024

It is well known that the Jacobi operators completely determine the curvature
tensor. The question of existence of a curvature tensor for given Jacobi
operators naturally arises, which is considered and solved in the previous
work. Unfortunately, although the published theorem is correct, its proof is
incomplete because it contains some omissions, and the aim of this paper is
to present a complete and accurate proof. We also generalize the main
theorem to the case of indefinite scalar product space. Accordingly, we
generalize the proportionality principle for Osserman algebraic curvature
tensors.
On the geometry in the large of Hadamard manifolds
Authors: Stepanov Sergey , Tsyganok Irina
Published: May 2024

A Hadamard manifold is a simply connected, complete Riemannian manifold with
nonpositive sectional curvature. The theory of Hadamard manifolds is a topic
that has been more and more intensively studied for more than forty years.
In the present paper, we prove Liouville-type theorems for conformal,
isometric and harmonic pointwise transformations of metrics of Hadamard
manifolds.
Basic classes of timelike general rotational surfaces in the four-dimensional Minkowski space
Authors: Bencheva Victoria , Milousheva Velichka
Published: May 2024

In the present paper, we consider timelike general rotational surfaces in the
Minkowski 4- space which are analogous to the general rotational surfaces in
the Euclidean 4-space introduced by C. Moore. We study two types of such
surfaces (with timelike and spacelike meridian curve, respectively) and
describe analytically some of their basic geometric classes: flat timelike
general rotational surfaces, timelike general rotational surfaces with flat
normal connection, and timelike general rotational surfaces with non-zero
constant mean curvature. We give explicitly all minimal timelike general
rotational surfaces and all timelike general rotational surfaces with
parallel normalized mean curvature vector field.
Global scheme of the basic interactions and their geometrical interpretations
Authors: Trencevski Kostadin
Published: May 2024

Our space-time consists of three 3-dimensional spaces: space S, space
rotations SR and time T. First are considered the basic possible 4 cases for
exchange among them: 1. r ? s, 2. s ? r, 3. r ? t, and 4. s ? t, where s ?
S, r ? SR, and t ? T. Analogous to the affine group of translations and
rotations A, it is considered a space group Gs of 6 ? 6 matrices, which is
isomorphic to the group Spin(4). The space metric observed by the particles
is found. Further are considered 4 generalized exchanges 1*, 2*, 3* and 4*,
induced by the cases 1, 2, 3, and 4. The case 1* leads to the electro-weak
interaction, and it is a consequence of non-commutativity between one
translation and one rotation in the space group Gs. The case 2* leads to the
strong interaction, and it is a consequence of non-commutativity between two
translations in the space group Gs. It leads also to the galactic
acceleration which is observed at the periphery of each galaxy, and now we
do not need dark matter in order to explain the motion of the distant stars
in the galaxies. The case 3* leads to electromagnetic interaction, and it is
a consequence of non-commutativity between one translation and one rotation
in the affine group A. The case 4* leads to gravitational interaction and it
is a consequence of non-commutativity between one translation and one
?radial translation? in the affine group A. The corresponding accelerations
are deduced and for a fixed space positions they are of type a = rot(??)
(gauge invariant), but the quantum and wave effects are neglected. It is
also predicted a new gravity-weak interaction, which belongs to the case 2*.
Invariants for equitorsion geometric mappings
Authors: Vesic Nenad , Milenkovic Vladislava , Stankovic Mica
Published: May 2024

New method of obtaining invariants for torsion-preserving mappings is the
main subject of this research. This research is consisted of introduction
and main part of research. After introduction, where we remind to some of
obtained invariants, we will develop general formula (Vesic, 2020) for
obtaining invariants for mappings. As special cases, we will remind to some
invariants for symmetric affine connection spaces which are not obtained
yet.
On isometric immersions of sub-Riemannian manifolds
Authors: Rovenski Vladimir
Published: May 2024

We study curvature invariants of a sub-Riemannian manifold (i.e., a manifold
with a Riemannian metric on a non-holonomic distribution) related to mutual
curvature of several pairwise orthogonal subspaces of the distribution, and
prove geometrical inequalities for a sub-Riemannian submanifold. As
applications, inequalities are proved for submanifolds with mutually
orthogonal distributions that include scalar and mutual curvature. For
compact submanifolds, inequalities are obtained that are supported by known
integral formulas for almost-product manifolds.
Helicoid and curvature based functional variations
Authors: Cvetkovic Milica , Velimirovic Ljubica
Published: May 2024

In view of the meaning of ruled surfaces in aesthetics, statics, scale and
manufacturing technologies, we point out the possibility of a mathematical
analysis in the case of infinitesimal deformations by considering the
rigidity of surfaces. In case of bendable surfaces it is useful to discuss
the variation of magnitudes such as the shape operator. The shape operator
is a good way to measure how a regular surface S bends in R3 by valuation
how the surface normal ? changes from point to point. In this work we
consider variations of the shape operator, the normal curvature and the
principal curvatures of helicoid under infinitesimal bending of the surface.
Quivers associated with finite rings - a cohomological approach
Authors: Lipkovski A.T. , Matovic J.
Published: May 2024

In this paper we present the ongoing research on connection between digraphs
associated to finite (commutative) rings and quiver representations. Digraph
associated to a finite ring A has the set of vertices V = A2 and arrows (or
edges) E = {(x, y) ? (x+y, xy), x, y ? A}. In another
terminology, it is a finite quiver with loops. In addition to previous work
to understand these graphs, the main goal of the present work is to
introduce some new cohomological and quiver methods. These methods should
provide us with better understanding of properties and classification of
finite rings.
Bounds on graviton mass and constraining Yukawa-like gravitational potential from planetary motion in the solar system
Authors: Borka Dusko , Borka Jovanovic , Jovanovic Predrag
Published: May 2024

In this study we used the observed perihelion precession of planetary orbits
in the Solar System in order to constrain theory of Yukawa-type gravity, and
to bound mass of graviton. For that purpose we assumed that the precession
angles of the planets in Yukawa-type gravity should be equal to their
observed values, as well as to the corresponding predictions of General
Relativity (GR). Starting from these requests we constrain Yukawa-like
gravitational potential. The obtained results showed that our estimates for
the range of Yukawa interaction ? at the Solar System scales are in good
agreement with recent experimental constrains. Assuming that the estimated
value of the range of ? corresponds to the Compton wavelength of graviton
?1, we then estimate the upper bound for its mass m1. We found that these
estimates were in agreement with our previous results obtained from the
observed stellar orbits around the Galactic Center (GC).
Eigenproblem of tensors - a geometrical viewpoint
Authors: Stojanov Jelena , Balan Vladimir
Published: May 2024

The classical eigenproblem focuses on eigenvalues and eigenvectors of linear
operators acting on a vector space. The matrix representation of the problem
has been extended towards multidimensional arrays, with various
applications. Another extension addresses invariant subspaces of multilinear
operators in Banach spaces. The generalization of the eigenproblem for
tensors is still a challenging issue. We investigate eigenproblems of
supersymmetric tensors on Riemannian manifolds, emerging from the initial
proper definitions, with the proposed extensions.
On the Roter type of generalised Wintgen ideal Legendrian submanifolds
Authors: Sebekovic Aleksandar
Published: May 2024

I. Mihai obtained an inequality relating intrinsic normalised scalar
curvature and extrinsic squared mean curvature and normalised normal
curvature of Legendrian submanifolds Mn in Sasakian space forms eM2n+1(c).
In this paper, for the class of generalised Wintgen ideal Legendrian
submanifolds Mn of Sasakian space form eM2n+1(c), we study relationship
between some properties concerning their Deszcz symmetry and their Roter
type.