bluuebunny/crossref_metadata_2025 huggingface dataset:
On the fractional total domatic numbers of incidence graphs
Authors: Zhang Yameng , Zhang Xia
Published: February 2023

For a hypergraph $ H $ with vertex set $ X $ and edge set $ Y $, the incidence graph of hypergraph $ H $ is a bipartite graph $ I(H) = (X, Y, E) $, where $ xy\in E $ if and only if $ x\in X $, $ y\in Y $ and $ x\in y $. A total dominating set of graph $ G $ is a vertex subset that intersects every open neighborhood of $ G $. Let $ \mathscr{M} $ be a family of (not necessarily distinct) total dominating sets of $ G $ and $ r_{\mathscr{M}} $ be the maximum times that any vertex of $ G $ appears in $ \mathscr{M} $. The fractional domatic number $ G $ is defined as $ FTD(G) = \sup_{\mathscr{M}}\frac{|\mathscr{M}|}{r_{\mathscr{M}}} $. In 2018, Goddard and Henning showed that the incidence graph of every complete $ k $-uniform hypergraph $ H $ with order $ n $ has $ FTD(I(H)) = \frac{n}{n-k+1} $ when $ n\geq 2k\geq 4 $. We extend the result to the range $ n > k\geq 2 $. More generally, we prove that every balanced $ n $-partite complete $ k $-uniform hypergraph $ H $ has $ FTD(I(H)) = \frac{n}{n-k+1} $ when $ n\geq k $ and $ H\ncong K_n^{(n)} $, where $ FTD(I(K_n^{(n)})) = 1 $.
Leveraging Data Spaces in Digital Twins for Smart Cities Deployment
Authors: Turcan Ana
Published: February 2023

The purpose of this chapter is to offer the readers an overview about how a data space is defined, how digital twins powered by data spaces can help us build inclusive sustainable smart cities, how emerging technologies can enhance data spaces, how data spaces impact digital twins and smart cities, and to share high level insights related to initiatives that have been adopted at the European Union level in terms of data spaces as business value creation and sustainability for a common path towards a sustainable data-driven ecosystem.
Impact of Digital Twins on Smart Cities
Authors: Vasiliu-Feltes Ingrid
Published: February 2023

There are several industries that have shown significant advancements in using digital twin capabilities. Healthcare, life sciences, and fintech constitute a powerful trifecta that can profoundly impact society at a global scale. The design and deployment of digital twins is complex and intimately connected to other digital technologies. However, in order to be successful, we will also need to overcome some of the challenges faced with any emerging technologies and mitigate against the risks of maleficent use. Specifically, ethics, cybersecurity concerns, and cross-industry standards will be on the agenda of most enterprises wishing to deploy digital twins. By leveraging a combined deployment of digital twins with other emerging technologies, we could potentially build a highly performant global digital twin ecosystem. Futurists would even venture to envision the existence of state-of-the-art smart cities where digital healthcare twins, digital life sciences twins, digital finance twins would be part of our daily lives.
Thinking Otherwise
Authors: Weber-Lewerenz Bianca Christina
Published: February 2023

Smart cities include the intelligent networking and smart operation of existing ones in accordance with the latest energy standards, SDGs, climate strategies, and common good. The building sector causes almost 40% of global CO2 emissions and is therefore the key to central climate neutrality by 2050. Innovative building technologies in existing buildings enable intelligent ecosystems within the 5th industrial revolution. Experience from the practical application provides signposts for the use of the latest digital technologies for the cities of tomorrow, with more efficiency, comfort, and safety for everyone who lives and works in them.
Technological Dream or Safety Traumata?
Authors: Weber-Lewerenz Bianca Christina
Published: February 2023

The new living and urban worlds of tomorrow and the sustainable design of space and society require even more efficiency, comfort, and security. Technological progress and safe design of smart cities can only be achieved with the help of a will to innovate and technical know-how of the partnering network constituting the building project team. Digital twins, AI, machine learning, deep learning, intelligent sensor systems, intelligent networking between buildings, artificial intelligence of things, clouds represent highly efficient technologies to both optimize fire safety and fire protection and increase human and building operation safety as part of the implementation of a holistic and comprehensive building protection solution in smart cities. A model says more than a thousand words: state-of-the-art fire protection systems, a customized automatized building solution, can be designed, planned, tested, individually adapted, and adjusted with the help of digital twins and AI (e.g., to optimize early fire detection, targeted alarms, and evacuation and to reduce costly false alarms).
Corporate Financing Decisions During a Crisis
Authors: Dayalan Padmalosani
Published: February 2023

This chapter reviews the literature on corporate financing decisions during a crisis. The COVID-19 pandemic impacted all walks of life: individual, corporate, and government. Decisions on corporate finance influence a firm's survival and growth and are influenced by many factors, like the investment opportunities, cost of capital, firm age, current capital structure, availability of funds, etc. This chapter sheds light on the factors that influence corporate financing during a crisis. Various crises, including the global financial crisis and COVID-19 crisis, influenced the corporate world, and corporate responses to these crises were detailed. The chapter reviews the empirical literature on the subject. It is observed that though the availability of external funds during a crisis is affected, corporates prefer to increase their leverage during a financial crisis when funds are required for operations. Similarly, the study also found that firms utilized retained earnings and deferred dividend payments during the crisis to make funds available to meet contingency and maintain sustainability.
COVID-19 Pandemic Jolt
Authors: Radhamani K.
Published: February 2023

Due to high instability in the markets and a situation similar to the year 2008, investors are worried about their investments and want to make quick decisions regarding the investments. Due to COVID-19, financial health has recessed. Investors are finding it difficult to decide whether they should continue their investment or redeem all and keep the cash aside for an emergency because life is unpredictable. In this context, secure monitoring and evaluation of mutual funds has become essential.
Decreasing Social Isolation in Older Adults and Stereotypes in Students
Authors: Branson Dana C.
Published: February 2023

The aging of the world is creating unique changes, specifically in resource management, health institutions, and social services. The need for gerontological social providers is increasing; however, student interest in working with older adults in social services is low. This lack of interest is correlated to negative stereotypes commonly displayed in media and propagated by culture. Additionally, ageist actions increase social isolation in older adults, which is associated with negative physical and mental health outcomes. Fortunately, positive exposure to older adults through experiential learning activities has demonstrated promise in decreasing students' ageist beliefs, thereby increasing their interest in working with older adults in the future. Furthermore, experiential learning activities decrease social isolation and increase feelings of importance and continued contribution for older adults. The chapter will discuss the use of a biopsychosocial assessment and intentional conversations between university students and older adults, the positive outcomes, and future implications.
Academic Stress Toward Limited Internet Access When Learning During the COVID-19 Pandemic in Rural Areas
Authors: Sari Nina Permata , Rajiani Ismi , Setiawan Muhammad Andri , Mutiani Mutiani , Abbas Ersis Warmansyah , Jumriani Jumriani
Published: February 2023

Online learning has been optimized all over the world during the Covid-19 pandemic. However, in Indonesia, this mode of learning brings several problems; mainly, limited internet access causing academic stress. This study was intended to analyze the impact of academic stress due to limited internet access in remote rural areas. The research applies a quantitative approach with purposive random sampling tested on 685 samples using Kendall's Tau-b test. The study results indicated the relationship between academic stress and the range of domiciles on internet access during the pandemic. The relationship between the academic stress variable and the range of residence to internet access during the pandemic is solid. Also, the level of academic stress experienced by students is relatively high based on the range of domicile for internet access during the pandemic. Thus, the lecturers must adopt the teaching methodology when teaching online platforms.
Exploring the Determinants of Occupational Stress in Variable Hour Teaching Staff in the UK Higher Education Institution
Authors: Hyams-Ssekasi Denis , Chimenya Andrew
Published: February 2023

In the world of work where demands and pressure are prevalent, personal stress is inevitable. The World Health Organisation (WHO) has noted work-related stress as a medical condition that requires attention. Professionals have coined the term occupation stress to denote to what employees experience in the workplace. Such stress at work can have a toll on the employees' productivity and well-being. In the academic work, there have been high levels of stress caused by the job demands, and this has caused an adverse effect on the individuals. A semi-structured interview of 30 variable hour teaching staff was utilised in the UK Higher Education. The findings indicated that most variable staff experienced job stressful elements. Overall, this chapter provides insights into the determinants of occupation stress among variable hours teaching staff.
Do Parenting Style and Emotional Intelligence Affect Career Self-Efficacy Among Malaysian Teenagers?
Authors: Nordin Fatin Nurain , Talib Jasmi Abu , Saputra Jumadil , Shah Kamarul Md , Raji Nurul Atiqah Ab , Mokhtar Farah Nabilah
Published: February 2023

In an individual's life, career self-efficacy plays an important role in creating the confidence level, abilities, and capabilities of a person in carrying out the tasks related to his or her career. Besides that, parents are crucial in shaping teenagers' career self-efficacy and emotional intelligence. Thus, this study examines the relationship between parenting style and emotional intelligence on career self-efficacy among Malaysian teenagers. This quantitative study involved 335 lower six students in Terengganu and was collected using purposive sampling. The data is analyzed using descriptive and inferential statistical analyses. This study found that teenagers' parenting style, emotional intelligence and career self-efficacy levels were categorized as high. The authoritarian parenting style is the most dominant, followed by authoritative and permissive. Also, this study indicated that emotional intelligence and parenting style significantly correlate with career self-efficacy and then parenting style and emotional intelligence have a significantly affect career self-efficacy.
The Interplay of Work-Family Conflict and Enrichment in Determining Employee Wellbeing
Authors: Sulong Suraya , Ibrahim R. Zirwatul Aida R. , Nazilah Ali , Dagang Mazidah Mohd , Saputra Jumadil
Published: February 2023

In the globalisation era, work and family are important components for individuals and improving living standards. The role of an employee and a family member is different and has high demands of time, energy, and commitment. Thus, this study aims to identify the level of work family conflict (WFC), work family enrichment (WFE) and job satisfaction. Also, to examine the predictors of job satisfaction. This study is designed using a quantitative approach through a survey questionnaire. A total of 248 public sector workers in Kuala Terengganu were collected using simple random sampling. The result of this study indicated that the level of WFC is moderate. Besides that, the level of WFE and job satisfaction are high. The findings indicated that family to work conflict, work to family enrichment, and family to work enrichment significantly positively affect job satisfaction. Besides that, work to family conflict does not significantly affect job satisfaction. The implications of the study indicate the importance of an organisation to emphasise the family in improving employee satisfaction.
An Empirical Review of Machine Learning Algorithms in the Medical Domain
Authors: Abhishek Kumar , Perni Vinay
Published: February 2023

Diseases like diabetes, heart disease, kidney disease, thyroid disease, and other diseases are increasing in frequency, and people are suffering globally. Specifically, thyroid and heart diseases affect many people and, without proper treatment, become serious health issues. Different thyroid and heart disease disorders can be detected early with specific symptoms. Here, the authors provide a thorough literature review of the different popular approaches for disease classification using specific symptoms for early identification and treatment using machine learning. This chapter also outlines the different advantages and limitations of specific approaches for disease symptom detection. The experimental results in existing literature has shown significant results on eight disease benchmark datasets using three state-of-the-art algorithms, including the reduced error pruning (REP) tree, random tree, and C4.5 decision tree algorithm.
Review and Analysis of Disease Diagnostic Models Using AI and ML
Authors: Pandey Upasana , Shakya Tejveer , Rajput Meet , Singh Rakshit , Mangal Tanish
Published: February 2023

Recently, disease prediction using diagnostic reports and images are one of the most popular applications of artificial intelligence (AI) and machine learning (ML). Several authors reported significant results in this area by combining cutting-edge hardware with AI and ML-based technologies. In this chapter, the authors present a review of different works carried for the prediction of several chronic diseases by researchers in last five years. Reported AI and ML based methodologies have been used to forecast chronic disease such as heart problems, brain tumors, asthma, diabetes, cholera, arthritis, liver diseases, kidney diseases, malaria, and leukemia. In the literature, the authors also discuss the different user interfaces which have been used to interact with real time AI and ML based disease prediction models. The authors have presented the detailed discussion of each paper including advantages, disadvantages, datasets, performance metrics such as precision, recall, accuracy and F1 score. In the final section, the survey concludes with a description of research gaps that can be addressed by future research attempts.
Pneumonia Detection Through X-Ray Images Using Convolution Neural Network
Authors: Garg Puneet , Srivastava Akhilesh Kumar , Anas Anas , Gupta Bhavye , Mishra Chirag
Published: February 2023

Pneumonia is a very contagious illness that spreads quickly among newborns. According to UNICEF, pneumonia was to blame for 16% of all baby deaths under the age of five. The main objective of this study is to determine whether a patient has pneumonia using a chest X-ray picture. CNN is used for this for this process, as it's great processing capability makes them the most effective choice for image processing and categorization. By the use of CNN, results will be obtained rapidly, and dependence on medical personnel will be reduced. Additionally, it will produce more precise findings than human vision, which could overlook a little X-Ray feature. More than17,000 chest X-ray pictures of pneumonic and healthy lungs are included in the collection. This model's total accuracy is 88.62%.
Risk Factors for the Adjustment of First-Year Students
Authors: Odhiambo Janet Auma , Aloka Peter Jo , Aomo John Agwaya
Published: February 2023

This chapter analyzes the key arguments as explored by previous researchers on coping strategies applied by first-year students transitioning to institutions of higher education. The majority of first-year students face various challenges in adjusting to college life. New students use their peer group as a source of their company, sympathy, affection, and experimentation, which can be either productive or wasteful. Quite a good number of students use negative coping strategies to eliminate the psychological pressures evoked by the situations they find themselves. Being aware of one's strengths and weaknesses can aid one in choosing the best coping strategies. Having self-control, acceptance of individual differences, and positive thinking would contribute to an individual's coping strategies. The recommendation is that the universities assign new students to individual peer guides and advise students on how to go about the university dynamics by getting involved in positive leisure activities such as sports, getting into serious peer study groups, and social networking.
Afrocentric Ontology for Academic Literacies Development
Authors: Eybers Oscar Oliver
Published: February 2023

The aim of this chapter is to share an Afrocentric ontology for academic literacies facilitators. An ontology is a conceptual framework wherein literacies facilitators may map outcomes, assessments, with features of African epistemologies. The author theorises ontologies, academic literacies, and the Afrocentric paradigm to aid colleagues in humanising their teaching, learning, and assessment practices. The chapter concludes by advocating indigenous African epistemes as rich sources of knowledge.
Greater Diversification of Activities, Greater Integration of Student Profiles
Authors: Bogas Paulo
Published: February 2023

Experiential pedagogical interventions offer the possibility to develop deep learning approaches. The objective of the study was to identify the factors that help to understand the reason why some students develop an approach to deep learning and others superficial, as well as to identify the strategies that best suit each student profile. To this end, a quasi-experimental pedagogical intervention was used with a mixed methodology. As main results, the response of students in terms of approaches to learning can be described as students who reinforce the initial deep approach, students who maintain the initial deep approach level, and others who change from one emphasis on the deep approach to one closer to the superficial. The result of the investigation suggests the inclusion of pedagogical activities and an integrative didactic of different motivations and initial strategies, leading to a possible adoption of deep approaches.
Institutional Support for First-Year Students
Authors: Olendo Rosemary Akinyi
Published: February 2023

Higher institutions of learning enroll first-year students in various academic programs. Owing to the challenges that students face, a good number do not complete their course. Student support to the first-year student is therefore quite critical and must not be left to chance. Most institutions have well organized support systems that are anchored on the student affairs division. This chapter takes the reader through the nature and scope of institutional support available to first-year students. This literature review established that most institutions have personnel divisions in place, and they offer support to first-year students. Incorporating parents in supporting students is helpful. Finding may inform counseling staff to develop early intervention programs.
From Scriptwriting to Mediatization of Online Training
Authors: Erradi Omar , Khaldi Maha , Erradi Mohamed , Khaldi Mohamed
Published: February 2023

The notion of scriptwriting is above all a work of content conception, organization of resources, planning of the activity, and mediations to accompany learning. While the notion of media coverage is the formatting of tools to transmit content, it must be understood in the sense of the process of scripting teaching content through a technical artifact, a media device. Through this chapter, the authors show two notions of scriptwriting and mediatization. the first concerns the pedagogical scripting. They define the pedagogical scripting, its different stages, and the tools of scripting an online teaching. The second is the online pedagogical scenario. They propose an example of an overall model of the design of a pedagogical scenario for online teaching. Then they define the basic concepts of mediatization, its effects, and its different fields of application. Then, they define the mediatization tools by proposing the best known and most used. They define the criteria for choosing a mediation tool and in particular the levels of interactivity for the choice of a tool.
Hydrogen Production from Waste Aluminum Foil AA1235 Using the Aluminum-Water Reaction Method with Thickness Variations
Authors: Maulana Fariz Risqi , Fadhilah Nur , Wahyuono Ruri Agung , Risanti Doty Dewi
Published: February 2023

Aluminium-water reaction is one of the most promising ways to produce clean and economical hydrogen. In this study, the effect of the waste Aluminium foil AA1235 thickness on Aluminium-water reaction process was investigated. The thickness of aluminum used are 6.5 m, 11.5 m and 19.5 m. Aluminum foil was cut by size 20 mm x 30 mm in each thickness variation. The 0.4 M NaOH and 0.01 M NaAlO2 was added as promoter on the process. The initial composition of the aluminum and the dislocations in the aluminum are also considered. The experimental results was evaluated by the mass reduction and shrinking core models. The initial composition of the aluminum and the dislocations in the aluminum are also considered. The experimental results were evaluated by the mass reduction and shrinking core models. The results obtained that aluminum with thinner thickness can be approximated by the 1-dimensional slab shrinking core model. Aluminum with a thicker thickness can be approached with a mass reduction model. It is also found out that smaller thickness has larger dislocation and better effects of NaAlO2 resulting higher yield of hydrogen production.
Is Library Anxiety a Real Phenomenon: A Review
Authors: Dilinika J. M. Shalani
Published: February 2023

This paper was composed with the objective of engaging in an analytical review of literature related to Library Anxiety in students with special emphasis on academic libraries. This paper extensively covers the spectrums of Library Anxiety theory, scales for measuring Library Anxiety, sources of Library Anxiety, impacts of Library Anxiety on students, and ways and means of reducing Library Anxiety. This analytical review points to the fact that Library Anxiety is a common phenomenon among students that adversely influence their ability to utilize information sources and services which affects their academic performance. Suggestions are also made for strategies to reduce students’ Library Anxiety levels and uplift their self-confidence, thereby helping them to become effective library users who are free from unpleasant and uneasy feelings.
An Inquiry of Information Professionals in Ancient Sri Lanka: Unto the Kandyan Period
Authors: Dehigama Kanchana
Published: February 2023

Budding literature across the world explores the antecedents of Information Professionals in historical societies while there is a paucity of knowledge on them in ancient Sri Lankan context. Therefore, the study attempts to explore the nature of history of Information Professionals in ancient Sri Lanka employing a qualitative approach through content analysis of primary sources such as inscriptions. The study brings to light a silhouette of professionals engaged in preserving information from the early historic period to the end of the Kandyan kingdom. These officials were mentioned as scribes, chief secretaries, registrars and record keepers such as Lapana, Kanapedika, Mahale, Muk-hi, Mukaveti, Sanhas Sivatta Nayinarun, and Sannissiwatte Kulaperumal. Most importantly, they were members of the Royal Council. Duties of these officers involved noting down the orders of the Kings, keeping copies in different formats for future reference, setting up inscriptions/manuscripts/charters, and being accountable for recording, attesting, publicizing and provision of access to the information.
The research contributes to the literature on Information Science studies as well as historical literature, while it deepens existing knowledge by focusing on a new-fangled look at ancient primary sources. This novel information provides access to a new arena for further research on the history of Sri Lankan information preservation institutions such as lekamge and badageba etc.
Effects of knowledge management on firm competitiveness: The mediation of operational efficiency
Authors: Mantje Mokgadi P. , Rambe Patient , Ndofirepi Takawira M.
Published: February 2023

Background: Although knowledge management (KM) directly impacts firm competitiveness, in efficiency-driven economies such as South Africa, the contribution of operational efficiency to this relationship has been underexplored in KM literature.Objectives: This study examined how operational efficiency interacts with KM to influence firm competitiveness. The study employs the South African context to enrich knowledge on the effects of KM on firm competitiveness and the extent to which operational efficiency mediates the process.Method: Using a quantitative approach with a survey design, 300 structured questionnaires were distributed to 300 small, medium and micro enterprise (SMME) owners and managers in the Free State province to establish the interaction of KM, operational efficacy and competitiveness.Results: The results of path coefficients revealed KM’s positive and significant effect on firm competitiveness. Moreover, operational efficiency partially mediated KM (recognition) (B = 0.1545, p = 0.019) and KM (implementation)’s (B = 0.0697, p = 0.050) effects on firm competitiveness.Conclusion: The prevalence of highest qualification among SMME owners/managers demonstrates that human capital development, especially business management training during business start-ups, may contribute to increased firm competitiveness. Moreover, the lack of resources in managing knowledge for implementing daily routines and increasing sales demonstrates that improved resource mobilisation by SMMEs might improve their competitiveness.Contribution: The study provides strategic interventions for improving SMME competitiveness through better management of their knowledge practices and operational efficiency.
Trends and issues relating to social media utilisation in academic libraries: Experiences from the University of Limpopo subject librarians
Authors: Mogale Mpho G. , Bopape Solomon
Published: February 2023

Background: As social media tools spread across every aspect of human life, academic librarians were apt to be their early adopters to boost the service provision in academic libraries.Objective: Guided by Technology Acceptance Model, this article examined a variety of social media tools used by academic librarians; usage and usefulness of social media; organisational support provided to academic librarians to use social media; and the factors that impede usage of social media in academic libraries.Methodology: This article employed a qualitative research methodology through semi- structured interviews with 10 purposively selected academic librarians attached to the University of Limpopo library.Results: The results showed that respondents were mostly familiar with WhatsApp, Facebook, Twitter and Instagram, which they used in their personal capacity. However, in their work environment, they utilised the library blog and Facebook to market and promote library services and to liaise with their users in schools or faculties. Restrictions of access to social media platforms during working hours, lack of skills, own social media policy and management support in the form of training were found to be factors that impede social media usage by academic librarians.Conclusion: Social media have a great deal of potential to contribute immensely towards the delivery of information services in academic libraries, though they are neglected.Contribution: Incorporation of social media in library work environment requires social media policies and subject librarians to be well equipped with different kinds of social media platforms for the advantage of academic libraries and their users.
The Effect of Camera and Display Technology on the Reliability of Digital Shade Evaluation
Authors: Kumar Aswini , Ramanarayanan Venkitachalam , Harikrishnan D. , Sajeev Rahul , Rejithan Athira , Karuveettil Vineetha , Suresh Reshma
Published: February 2023

Introduction:

For a successful prosthodontic rehabilitation, accurate and economic shade selection methods are warranted. Shade selection with digital cameras and various commonly used digital displays can be suggested as an alternative to expensive colorimetric instruments and inaccurate visual shade selection. To digitalize prosthetic rehabilitation, standards need to be set on minimum digital specifications required to capture and communicate accurate shade selection. This study aimed to establish a minimum specification required for a digital image, to achieve the most accurate result in prosthodontic shade selection, using digital photography.

Materials and Methods:

A cross-sectional study was conducted among 100 dental professionals with normal color vision. Sixteen shade tabs were randomly selected from two commonly used shade guides and were photographed using four different commonly used digital cameras under standardized settings. After dividing the shade tabs into four groups randomly, the images were displayed on four different outputs. Participants were made to match the outputs to a complete set of shade guide. Descriptive statistics were used to assess the proportion of correct responses. Chi-square test was used to test for the presence of statistical association between the groups.

Results:

For digital shade evaluation, output from the compact camera (Nikon Corporation, Tokyo, Japan) with an effective output of 14 megapixel showed higher number of responses in terms of accuracy, in comparison with other devices which produced digital outputs with a higher pixel density. The shades were identified best on outputs with a higher pixel density of 2560 × 1600-pixel resolution, followed by full HD LCD display (1920 × 1080-pixel resolution).

Conclusion:

This study recommends digital photography using a 14-MP camera as a minimum specification for shade selection. For display outputs, laptops with a screen resolution of at least 1920 × 1080, calibrated in standard red, green, blue color space is recommended for visual shade selection.
Prevalence of Internet Gaming Disorder among Engineering Students Aged 18–25 Years
Authors: Palal Nevin J. , Mohandas Sreelakshmi , Mathew Minu Maria , Raj Aravind S. , Mohan Aravind V. , Bari Abdul , K. P. Amrithachandra , Krishna R. Aravindh
Published: February 2023

Introduction:

The number of mobile game users has increased globally over the last few years. Gaming has been reported as a new way of satisfying basic human needs within the constraints of the current modern society. This research aimed to determine the prevalence of Internet gaming disorder (IGD) among engineering students aged 18–25 years in the Ernakulam district of Kerala and the associated risk factors.

Materials and Methods:

This was an online-based cross-sectional study among engineering colleges in Ernakulam district of Kerala selected by simple random sampling. Students with psychiatric ailments were excluded from the study. On the basis of the prevalence of IGD, reported by Mihara and Higuchi in 2017, the minimum calculated sample size for this study using the formula, n = (4*pq)/d2 was 291. The study tool was a semi-structured questionnaire with three segments: socio-demographic profile, IGD, and Internet gaming behavior pattern. As data were collected using Google Forms, data were downloaded from Google Sheet and exported to and analyzed using SPSS software program, version 20.0.

Results:

The study had 271 participants and most of them were males. The mean age group of the study population was 22.77 years. The prevalence of IGD was found to be 2.2%. In the associated risk factors, people living alone were found to have a significant association with IGD.

Conclusion:

Although the prevalence observed in our research is low, more attention needs to be given to keeping the prevalence low, as the number of gamers in India has been constantly increasing.
Escitalopram-Induced Hyperprolactinemic Galactorrhea
Authors: Yedla Deepthi , Sharmila Vijayan
Published: February 2023

Galactorrhea is milky secretions from the breast in women who have not breast-fed for a year. Escitalopram, a selective serotonin reuptake inhibitor (SSRI), owing to its potency and tolerance, is regarded as the primary line drug in the management of depression and anxiety disorders. SSRIs may rarely cause symptoms brought on by enhanced prolactin levels. Antidepressants that increase serotonin may additionally cause a rise in prolactin by improving dopamine neurotransmission. In the current research, we present a case of hyperprolactinemic galactorrhea linked to escitalopram. A 32-year-old woman presented with bilateral breast heaviness and milky secretions after using escitalopram for anxiety and her serum prolactin level was found to be elevated. Galactorrhea disappeared and her prolactin level returned to normal after escitalopram was stopped.
Steroid-responsive unilateral keratouveitis following systemic treatment in a patient with human immunodeficiency virus and leishmaniasis
Authors: Su Erin , Lu Jonathan E. , Voss Kristina
Published: February 2023

Ocular leishmaniasis, a rare form of vector-borne parasitic infection, can affect the adnexa, retina, uvea, and cornea. Coinfection with human immunodeficiency virus (HIV) and Leishmania may be a distinct clinical entity as the pathogens act synergistically, enhancing each other's pathogenicity, and leading to more severe forms of the disease. Ocular leishmaniasis in the setting of HIV coinfection most commonly causes anterior granulomatous uveitis, for which the etiology can be either active ocular infection or posttreatment inflammatory phenomenon. Keratitis is not considered to be associated with HIV but has rarely been seen from direct parasite invasion or in association with miltefosine. The judicious use of steroids in the treatment of ocular leishmaniasis is critical as steroid use is paramount to the treatment of uveitis associated with posttreatment inflammatory phenomenon but can worsen the prognosis when given in the setting of active, untreated infection. Here, we present a case of unilateral keratouveitis in a leishmaniasis and HIV-coinfected male following completion of systemic antileishmanial therapy. The keratouveitis completely resolved with only the addition of topical steroids. The rapid resolution with steroids suggests that keratitis, not only uveitis, can be an immune-mediated phenomenon in post- or ongoing-treatment individuals.
Clinical outcomes of prestripped, prestained, and preloaded Descemet's membrane endothelial keratoplasty (“P3 DMEK”)
Authors: Juratli Lena , Qureshi Sana , Liles Nathan , Hussain Munira , Hood Christopher , Mian Shahzad I.
Published: February 2023

PURPOSE:

Despite faster healing and reduced risk of rejection, some surgeons are hesitant to adopt Descemet membrane endothelial keratoplasty (DMEK) due to difficult intraoperative tissue preparation. Use of eye bank prestripped, prestained, and preloaded (p3) DMEK tissue can reduce the learning curve and risk of complications.

MATERIALS AND METHODS:

We conducted a prospective study including 167 eyes undergoing p3 DMEK and compared outcomes to a retrospective chart review of 201 eyes that underwent standard DMEK surgery. The primary outcomes were graft failure, detachment, and re-bubbling frequency. The secondary outcomes included baseline and postoperative visual acuity at months 1, 3, 6, and 12. Baseline and postoperative central corneal thickness (CCT) and endothelial cell counts (ECC) were collected.

RESULTS:

ECC decrease for p3 DMEK at 3, 6, and 12 months were 15.0%, 18.0%, and 21.0%, respectively. Forty (24%) of p3 DMEK and 72 (35.8%) of standard DMEK eyes had at least a partial graft detachment. There was no difference in CCT, graft failures, or re-bubble frequency. At 6 months, mean visual acuity was 20/26 and 20/24 for standard and p3 DMEK, respectively. Mean case time for p3 DMEK with phaco or p3 DMEK alone was 33 and 24 min, respectively. Mean case time for eyes undergoing DMEK with phaco or DMEK alone was 59 and 45 min, respectively.

CONCLUSION:

P3 DMEK tissue is safe and can provide excellent clinical outcomes that are comparable to standard DMEK tissue. Eyes undergoing p3 DMEK may have lower graft detachment and ECC loss.
Unitary Harish-Chandra representations of real supergroups
Authors: Carmeli Claudio , Fioresi Rita , Varadarajan Veeravalli S.
Published: February 2023

We give conditions for unitarizability of Harish-Chandra super modules for Lie supergroups and superalgebras.
Analytic general solutions of nonlinear second-order $q$-difference equations with a double characteristic value
Authors: Suzuki Mami
Published: February 2023

As far as the author knows, it seems that an existence theorem of a solution of a general nonlinear

q

-difference equation is not known. In this paper we will investigate a nonlinear second order

q

-difference equation whose characteristic equation has only one solution and will show analytic general solutions of such an equation. Further, we will show an example.
Matrix data analysis methods for applications in laser beam position measurement modules
Authors: Budzyń Grzegorz , Baranski Jedrzej , Rzepka Janusz
Published: February 2023

This paper addresses the problem of selecting an optimal algorithm suitable for real-time processing of matrix sensor data in laser beam positioning applications. We compare four different algorithms and prove that the chosen one provides the same results in time by several orders of magnitude lower and with negligible memory consumption, making it suitable for use in microcontroller-based sensing modules. Full Text: PDF ReferencesS. Donati, Electro-Optical Instrumentation-Sensing and Measuring with Lasers (Prentice Hall, Upper Saddle River, NJ, 2004). DirectLink K.N. Joo, J.D. Ellis, E.S. Buice, J.W. Spronck, R.H. Munning Schmidt, "High resolution heterodyne interferometer without detectable periodic nonlinearity", Optics Expr. 18(2), 1159 (2010). CrossRef G. Budzyń, J. Rzepka, "Study on Noises Influencing the Accuracy of CNC Machine Straightness Measurements Methods Based on Beam Position Detection", J. Machine Engin. 20(3), 76 (2020). CrossRef Reference materials for PSD and CMOS sensors, , referenced 7-11-2022 CrossRef S. Das, A. Saha, "Laser Beam Position-Dependent PSD-Based Calibrated Self-Vibration Compensated Noncontact Vibration Measurement System", IEEE Trans. Instr. Meas. 68(9), 3308 (2019). CrossRef P. Zhang, J. Liu, H. Yang, L. Yu, "Position Measurement of Laser Center by Using 2-D PSD and Fixed-Axis Rotating Device", IEEE Access 7, 140319 (2019). CrossRef J. Rzepka, G. Budzyn, "Laser measurement system for machine tools", Proc. SPIE 5144, 840 (2003). CrossRef S. Xiang, H. Li, M. Deng et al., "Geometric error identification and compensation for non-orthogonal five-axis machine tools", Int. J. Adv. Manuf. Technol. 96, 2915 (2018). CrossRef N. Hagen, E. Dereniak, "Gaussian profile estimation in two dimensions", App. Opt. 47(36), 6842 (2008). CrossRef S.M. Ross, Introduction to Probability and Statistics for Engineers and Scientists (Academic Press 2014). CrossRef
The ripple-curry amplifier in photonic applications
Authors: Gilewski Marian
Published: February 2023

This paper discusses the new design of a amplifier for the miniature MEMS-type spectrometer. The application problem of the new amplifier was the correct conditioning of the sensor's photoelectric pulses. The processed signal was a sequence of pulses that had variable both frequency and amplitude value. Thus, such a broadband amplifier should have the functionality of automatic gain control. This paper describes the concept of the new circuit, develops its detailed application, and then performs validation tests. Measurement results of the new circuit are discussed in the final section of the paper. Full Text: PDF ReferencesC. Ortolani, Flow Cytometry Today. Detectors and Electronics, (Springer 2022). pp. 97-119, CrossRef D. Maes, L. Reis, S. Poelman, E. Vissers, V. Avramovic, M. Zaknoune, G. Roelkens, S. Lemey, E. Peytavit, B. Kuyken, "High-Speed Photodiodes on Silicon Nitride with a Bandwidth beyond 100 GHz", Conference on Lasers and Electro-Optics, Optica Publishing Group, (2022). CrossRef R. Das, Y. Xie, A.P. Knights, "All-Silicon Low Noise Photonic Frontend For LIDAR Applications", 2022 IEEE Photonics Conference (IPC), IEEE Xplore (2022). CrossRef FEMTO Messtechnik GmbH, Variable Gain Photoreceiver - Fast Optical Power Meter Series OE-200, DirectLink M. Nehir, C. Frank, S. Aßmann, E.P. Achterberg, "Improving Optical Measurements: Non-Linearity Compensation of Compact Charge-Coupled Device (CCD) Spectrometers", Sensors 19(12), 2833 (2019). CrossRef F. Thomas,; R. Petzold, C. Becker, U. Werban, "Application of Low-Cost MEMS Spectrometers for Forest Topsoil Properties Prediction", Sensors 21(11), 3927 (2021). CrossRef M. Muhiyudin, D. Hutson, D. Gibson, E. Waddell, S. Song, S. Ahmadzadeh, "Miniaturised Infrared Spectrophotometer for Low Power Consumption Multi-Gas Sensing", Sensors 20(14), 3843 (2020). CrossRef S. Maruyama, T Hizawa, K. Takahashi, K. Sawada, "Optical-Interferometry-Based CMOS-MEMS Sensor Transduced by Stress-Induced Nanomechanical Deflection", Sensors 18(1), 138 (2018). CrossRef S. Merlo, P. Poma, E. Crisà, D. Faralli, M. Soldo, "Testing of Piezo-Actuated Glass Micro-Membranes by Optical Low-Coherence Reflectometry", Sensors 17(3), 8 (2017). CrossRef M.S. Wei, F. Xing, B. Li, Z. You, "Investigation of Digital Sun Sensor Technology with an N-Shaped Slit Mask", Sensors 11(10), 9764 (2011). CrossRef Z. Yang, T. Albrow-Owen, W. Cai, T. Hasan, "Miniaturization of optical spectrometers", Science 371, 6528 (2021). CrossRef Hamamatsu Photonics K.K. Fingertip size, ultra-compact spectrometer head integrating MEMS and image sensor technologies. DirectLink Microchip Technology Inc, MCP6291/1R/2/3/4/5 1.0 mA 10 MHz Rail-to-Rail Op Amp, CrossRef Microchip Technology Inc. MCP6021/1R/2/3/4 Rail-to-Rail Input/Output 10 MHz Op Amps, CrossRef
Pemetaan lahan pertanian pangan berkelanjutan Di distrik aifat, aitinyo dan Ayamaru Utara Kabupaten Maybrat
Authors: Tubur Herman , Sagrim M , Bachri S , Naa K , Howay M
Published: February 2023

Land is the main factor of agriculture development and food production, but along with the population increase, the pace of development, and the increase in the function of land for food also affect the availability of land to support national food security. The research was conducted in November–December 2020 in Maybrat Regency in 3 districts, North Ayamaru, Aifat and Aitinyo, to find out Characteristics of the slope of the land for the development of food crop agriculture, potential land as Sustainable Food Agricultural Land and Sustainable Food Agricultural Reserve Land and Mapping the physical aspects of land in the LP2B and LCP2B land areas.

The results showed that the total land area in 3 observation districts with flat conditions (slope 0-8%) suitable for food crop development was 42,239 ha, with details of Aifat 23,166 ha, Aitinyo 13,731 ha, and North Ayamaru 5,341 ha. Based on the slope aspect, the potential area to be built and the availability of road infrastructure, there are 7,091 ha of potential land for sustainable food agriculture (LP2B) and 6,698 ha of sustainable food agriculture reserves (LP2B). Physical factors for the development of LP2B and LCP2B such as soil depth, drainage and commodities are in the appropriate category.
necesaria revisión de la doctrina del Tribunal Supremo sobre el tiempo de trabajo en las guardias localizadas conforme al contenido de la Carta Social Europea y su interpretación por el Comité Europeo de Derechos Sociales
Authors: Vila Tierno Francisco
Published: February 2023

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Linear Representation of Graphs: Applications to Molecular Graphs
Authors:   University of Kashan, Faculty of Mathematical Sciences, Iran, Ashrafi Ali Reza , Bretto Alain , Faisant Alain ,   Universit´e Jean Monnet, Facult´e de Sciences et Techniques
Published: February 2023

In this article we build a linear representation starting from a multigraph; this allows us to give an algebraic view of the multigraph we are studying. We show that two isomorphic multigraphs give equivalent representations; conversely two equivalent representations give isomorphic multigraphs. For the clarity of the article we give at the beginning, classical results on representations, nevertheless these are specific to our graph representation.
Building up of Students’ Vocabulary Mastery through Knowing by Heart Strategy
Authors: Sardi Ahmed
Published: February 2023

The purpose of this research was positively to find out whether the knowing by heart strategy is applicable/ effective or not to build up the student’s vocabulary mastery of SMPN 2 Patampanua especially for the second year. In sum, this research was adopted by experimental research design. The population of this research was the second year students of SMP Negeri 2 Patampanua Pinrang in 2012-2013 academic years, which are spread out in 246 students. Then, the sample was taken from VIII.6 with amount 40 students and VIII.4 on amount 40 students. The sample selected by using cluster random sampling technique toward total sample 80 students. The data was obtained by distributing instrument as multiple choice tests and filling the blank test. The overall result of data analysis showed that the mean score on post-test of experiment class (73,06) was higher than the post-test of control class (66,69), and the t-test value (3,593) was greater than t-table value in the level (2,021). However, alternative hypothesis failed to be rejected. It could be concluded that the application of the knowing by heart strategy as the first applied strategy was able to build up the student’s vocabulary mastery in learning English at SMPN 2 Patampanua for the second year.
Online and Offline English Learning Systems: Perceptual from Teachers and Students
Authors: Irma Irma , Rafiqa Rafiqa , Danial Muhammad
Published: February 2023

Current education issues are online and offline learning systems as a mitigation of learning loss. This study intends to investigate (1) the perception of the teachers and students on online and offline English learning systems and (2) The difficulties of teachers in online and offline English teaching-learning. The study attempted qualitative research. The subject of this study were two English teachers and students of SMPN 3 Tinambung. The data was gathered through questionnaires and interviews. The result indicates (1) The teachers’ and students’ perceptions towards online and offline English learning systems are determined by flexibility, interaction, and knowledge gained. In online learning, teachers have a negative perception of flexibility and interaction and a negative and positive perception of knowledge gained. Students have negative and positive perceptions of flexibility, a negative perception of interaction, and a positive perception of knowledge gained. Teachers and students have positively perceived flexibility, interaction, and knowledge gained on offline learning. (2) The teachers’ difficulties were they had no good internet access and students’ assessments in online teaching. The teachers’ difficulties in the offline class were the students less concentration and focus and classroom management. This paper implies that both online and offline systems have obstacles in the English teaching-learning process