bluuebunny/crossref_metadata_2025 huggingface dataset:
The impact of ChatGPT on academia: A comprehensive analysis of AI policies across UT system academic institutions
Authors: Niraula Sanjeev
Published: April 2024

Since ChatGPT was released by OpenAI, an American company, in 2022 for the public, ChatGPT has become the talk of every town, as evident by its over 180 million users worldwide. This chatbot's ability to engage in human-like conversations, answer questions, and generate diverse content has sparked widespread debates across various fields, including education. In response to the growing rise and influence of ChatGPT, educators have contrasting opinions; some view ChatGPT as an opportunity, whereas others regard it as a challenge that needs to be addressed on time. In order to deal with the complexities caused by ChatGPT in the field of education, universities have formulated their policies on AI. Guided by the research question, "How does universities' policy on AI reflect academia's view toward ChatGPT?" this study attempts to review the AI policy of the nine academic institutions under the UT system of the United States. The primary goal is to understand the extent to which universities have adapted their policies in response to the challenges and opportunities posed by ChatGPT and how these policies reflect the broader sentiments within academia. To achieve this, this study reviews the universities' policies regarding AI using a qualitative data analysis methodology. The primary data sources include official policies, statements, and guidelines developed by the universities in response to the challenges and opportunities presented by ChatGPT. While reviewing the policies, the study determines whether ChatGPT is banned and why. Or embraced, and if so, in what ways? By examining these policies, the study aims to uncover the various approaches universities have taken to integrate or regulate the use of ChatGPT within academic environments. The thesis of this study is twofold. First, it seeks to provide a comprehensive overview of how US universities have responded to ChatGPT in the educational landscape. This involves identifying common themes, concerns, and strategies institutions employ to deal with the complexities introduced by this generative language model. Second, the study aims to contribute to existing scholarship by offering insights into how academia adapts to the influence of AI technologies like ChatGPT. This study examines the intersection of AI and education and the evolving nature of educational norms in the digital age by uncovering the diverse perspectives and approaches within university policies.
PERFIL CLÍNICO, FARMACOTERAPÊUTICO E LABORATORIAL DE PACIENTES INTERNADOS COM INSUFICIÊNCIA CARDÍACA AGUDA
Authors: Da Silva Teixeira Jessica , Rodrigues Karla Neco , Santana Tamiles Daiane Borges , Santos Jefferson Pereira dos , Santos Fábia Rayra da Silva Bispo dos , Santos Nara Jacqueline Sousa dos , Oliveira Souza Bianca , Pereira Araújo Isabel , Brasileiro Lemos Lucas , Da Silveira Lemos Gisele
Published: April 2024

A insuficiência cardíaca aguda (ICA) é uma das causas mais comuns de internação hospitalar, associada a um alto risco de mortalidade. O tratamento atual é principalmente sintomático, sendo os exames laboratoriais realizados, a fim de complementar a avaliação clínica no diagnóstico e auxiliar no estabelecimento do perfil de risco admissional e prognóstico. Este estudo teve como objetivo caracterizar o perfil clínico, farmacoterapêutico e laboratorial de pacientes internados com insuficiência cardíaca aguda em hospital referência regional. Trata-se de um estudo transversal retrospectivo, descritivo, de abordagem quantitativa. Os participantes do estudo foram aqueles com alta médica por ICA pela classificação Internacional de Doenças (CID-10), admitidos na sala de emergência. Excluindo-se a participação de pacientes com tempo de internação inferior a 24 horas, menores de 18 anos. Para análise estatística foi usado o programa SPSS versão 21.0. Quanto ao perfil farmacoterapêutico, os medicamentos mais frequentes foram os que atuam no aparelho cardiovascular e aparelho digestivo e metabolismo, sendo a furosemida o fármaco mais frequente. A análise entre as alterações laboratoriais e a escala de ADHERE, revelou diferença estatística significativa entre os pacientes com risco baixo e risco intermediário/alto nos valores de hemoglobina (p=0,005), TGO (p=0,001), creatinina (p=0,000), ureia (p=0,000), potássio (p=0,004), TTPA (p=0,004) e RNI (p=0,021). Concluiu-se que os medicamentos frequentemente corresponderam ao tratamento recomendado no manejo inicial de pacientes com ICA. O risco de mortalidade intra-hospitalar intermediário/alto de acordo com a escala de ADHERE estavam associados com alterações laboratoriais dos pacientes com ICA.
Review on Pasteurellosis: Causes, Pathogenesis, Diagnosis and Current Status in Ethiopia
Authors:   Animal Health Institute (AHI), Microbiology Research Laboratory, P.O. Box 04, Sebeta, Ethiopia, Umer Abdi Ahmed , Mezgebu Ebisa ,   Animal Health Institute (AHI), Microbiology Research Laboratory, P.O. Box 04, Sebeta, Ethiopia
Published: April 2024

Infectious diseases are one of the key constraints like pneumonic pasteurellosis is most recurrent respiratory infections that affect ruminants. This disease is caused by transportation stress, bacteria, viruses and climatic changes. A variety of etiologic agent form this multi-factorial disease such as Pasteurella multocida (P. multocida) (P. multocida gallicida, P. multocida multocida) and P. multocida septica. may also be divided into five capsular serogroups (A-E) and sixteen somatic serotypes [1-16]. Mannheimia haemolytica (M. haemolytica) formerly named P. haemolytica has two biotypes A and T depending on arabinose and trehalose fermentation. The colonies produced by M. haemolytica are odorless, moist, smooth, grayish, and translucent measuring approximately 1-3mm in diameter on blood agar plates while the colonies of P. multocida are round, grayish, shiny and non-haemolytic. Pneumonic pasteurellosis diagnosis is based on the clinical symptoms, necropsy, and bacteria isolation, Biolog, molecular and by the recent developed bacterial diagnostic technique called Matrix-Assisted-Laser-Desorption/Ionization-Time-of-Flight Mass Spectrometry (MALDI TOF MS), a fast, reliable and cost-effective method. Pasteurellosis is complex multifactorial disease and difficult to control but good management and prevention is advisable.
Synchronous Laryngeal Primary Cancer in a Patient with Esophageal Squamous Carcinoma Cell: A Case Report
Authors:   Department of Visceral Surgery, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy of Rabat, Morocco, Y Ouhammou , M Gridda ,   Department of Visceral Surgery, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy of Rabat, Morocco, I Maouni ,   Department of Visceral Surgery, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy of Rabat, Morocco, M Yaka ,   Department of Visceral Surgery, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy of Rabat, Morocco, N Njoumi ,   Department of Visceral Surgery, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy of Rabat, Morocco, A Zentar ,   Department of Visceral Surgery, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy of Rabat, Morocco, A Ait Ali ,   Department of Visceral Surgery, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy of Rabat, Morocco
Published: April 2024

Unexpected diagnosis of primary synchronous cancer in a patient with esophageal squamous carcinoma cell makes therapeutic management difficult. The careful evaluation of synchronous tumors is a primority aspect of management. we present the unusual case of an individual with esophageal squamous carcinomas cell synchronously associated with another primary laryngeal tumor. Initial clinical assessment was performed and consisting in a pan endoscopy and FDG-Pet scan / CT revealed the presence of Synchronous Head and Neck and Esophageal Carcinoma (SHNEC). As recommended in the literature, surgical resection was not indicated. In this case radio chemotherapy often remains the only therapeutic alternative which guarantees a better result and improves the prognosis. The patient progressed well under concomitant radio chemotherapy even if complications inherent to this treatment required the cessation of treatment for a short period.
Insights into Serotonin-Receptor Binding and Stability via Molecular Dynamics Simulations: Key Residues for Electrostatic Interactions and Signal Transduction
Authors: Verma Arunima , mondal padmabati
Published: April 2024

Serotonin-receptor binding plays a key role in several neurological and biological processes, including mood, sleep, hunger, cognition, learning, and memory. In this article, we performed molecular dynamics simulation to examine the key residues that play an essential role in the binding of serotonin to the G-protein-coupled 5-HT$_{1B}$ receptor (5HT$_{1B}$R) via electrostatic interactions. Key residues for electrostatic interactions were identified via bond distance analysis and frustration analysis method. An end-point free energy calculation method determines the stability of the 5-HT$_{1B}$R due to serotonin binding. The single-point mutation of the polar/charged amino acid residues (Asp129, Thr134) on the binding sites and the calculation of binding free energy validates the quantitative contribution of these residues in the stability of the serotonin-receptor complex. The principal component analysis reflects that the serotonin-bound 5-HT$_{1B}$R is more stabilized than the apo-receptor regarding dynamical changes. The difference dynamic cross-correlations map shows the correlation between the transmembranes and mini-G$_{o}$, which indicates that the signal transduction happens between mini-G$_{o}$ and the receptor. Allosteric pathway analysis reveals the key nodes for signal transduction in 5-HT$_{1B}$R. These results provide useful insights into the study of signal transduction pathways and mutagenesis to regulate the functionality of the complex. The developed protocols can be applied to study local non-covalent interactions and long-range allosteric communications in any protein-ligand system for computer-aided drug design.
Computational Mechanistic Insights into Reversible and Irreversible Covalent Inhibitors Targeting SARS-CoV-2 Mpro
Authors: Asadi Mojgan , Nandi Ashim , Warshel Arieh
Published: April 2024

The treatment of SARS-CoV-2 can be accomplished by an effective suppression of its 3CL protease (3CLpro), also known as the main protease (Mpro) and nonstructural protein 5 (nsp5). Covalent inhibitors can irreversibly and selectively disable the protease, particularly when they are highly exothermic. Herein we delve into the distinct kinetic behaviors exhibited by two covalently linked SARS-CoV-2 inhibitors. One of these inhibitors features a nitrile reactive group, while the other has this group replaced by an alkyne group, a less reactive electrophile. Our investigations involve the assessment of pertinent free energy surfaces through the utilization of both ab initio and empirical valence bond (EVB) simulations. The calculated free energy profiles show that substituting the nitrile group with alkyne significantly increases the overall reaction exothermicity. This leads to an efficient inhibition, even though the reaction of the nitrile group has a substantially lower barrier than the alkyne group. We examine the time-dependence of IC50 inhibition by applying a novel kinetic simulation approach, which is particularly important in studies of covalent inhibitors with a very exothermic bonding step. Our computational approach reproduces the observed binding kinetics and appears to provide a powerful tool for studies of covalent inhibitors.
The effects of solid acids as cocatalysts on the chelation-assisted hydroacylation of alkenes and alkynes
Authors: Vergara-Arenas Blanca I. , García-Ríos Eréndira , Gaviño Rubén , Cárdenas Jorge , Martinez-Garcia Alfredo , Juarez-Arellano Erick A. , López-Torres Adolfo , Morales-Serna Jose Antonio
Published: April 2024

The use of homogeneous Bronsted acid cocatalysts (such as benzoic acid) in hydroacylation reactions via imine intermediates has been extensively studied, but the use of heterogeneous cocatalysts has been limited to montmorillonite K10. Thus, we can use other solid acids to increase the efficiency of the reaction. Here, we described the effects of sulfated zirconia, Al-MCM-41 or superacid modified montmorillonite on the hydroacylation of alkenes and alkynes with aldehydes via imine intermediates and in the presence of the Wilkinson complex. Furthermore, we addressed the dual role of montmorillonite, a redox reagent in the presence of TEMPO and an acid solid, allowing the direct use of benzyl alcohols as substrates to generate saturated or a-b unsaturated ketones.
Silane-mediated, Facile and Selective C(sp²)−H and N−Methylation using Formaldehyde
Authors: Khan Jabir , Taneja Neha , Yadav Naveen , Hazra Chinmoy
Published: April 2024

The use of (para)-formaldehyde for the selective reductive methylation of C(sp²)−H and N−H bonds, utilizing a combination of silane and hexafluoroisopropanol (HFIP) as activators, is reported. Overcoming the complexity of C(sp²)−H methylation on aryl and heteroaryl substrates, the process utilizes Friedel–Crafts alkylation, followed by silane as a hydride donor under mild acidic medium. The developed protocol offers a promising avenue for converting amines into their monomethylated counterparts with excellent yields. Mechanistic insights into the reductive methylation process are provided, highlighting the role of silane and HFIP in achieving good selectivity. This scalable transformation is well-suited for general alkylation using various non-activated aliphatic aldehydes under mild conditions in a shorter reaction time and is also adaptable for the late-stage methylation of pharmaceuticals and natural products. Notably, the method has been successfully employed for the efficient synthesis of the antifungal drug Butenafine and non-steroidal anti-inflammatory drug (NSAID) Flurbiprofen derivative.
Electronic control of polyproline II helix stability via the identity of acyl capping groups: the pivaloyl group particularly promotes PPII
Authors: Bhatt Megh R. , Zondlo Neal J.
Published: April 2024

The type II polyproline helix (PPII) is a fundamental secondary structure of proteins, important in globular proteins, in intrinsically disordered proteins, and at protein-protein interfaces. PPII is stabilized in part by n->pi* interactions between consecutive carbonyls, via electron delocalization between an electron-donor carbonyl lone pair (n) and an electron-acceptor carbonyl (pi*) on the subsequent residue. We previously demonstrated that changes to the electronic properties of the acyl donor can predictably modulate the strength of n->pi* interactions, with data from model compounds, in solution in chloroform, in the solid state, and computationally. Herein, we examined whether the electronic properties of acyl capping groups could modulate the stability of PPII in peptides in water. In X–PPGY-NH2 peptides (X = 10 acyl capping groups), the effect of acyl group identity on PPII was quantified by circular dichroism and NMR spectroscopy. Electron-rich acyl groups promoted PPII relative to the standard acetyl (Ac-) group, with the pivaloyl and iso-butyryl groups most significantly increasing PPII. In contrast, acyl derivatives with electron-withdrawing substituents and the formyl group relatively disfavored PPII. Similar results, though lesser in magnitude, were also observed in X–APPGY-NH2 peptides, indicating that the capping group can impact PPII conformation at both proline and non-proline residues. The pivaloyl group was particularly favorable in promoting PPII. The effects of acyl capping groups were further analyzed in X–DfpPGY-NH2 and X–ADfpPGY-NH2 peptides, Dfp = 4,4-difluoroproline. Data on these peptides indicated that acyl groups induced order Piv- > Ac- > For-. These results suggest that greater consideration should be given to the identity of acyl capping groups in inducing structure in peptides.
ASSESSING THE ROLE OF SUPPLIER RELATIONSHIP MANAGEMENT IN ENHANCING SUPPLY CHAIN PERFORMANCE: A STUDY IN BANGLADESH
Authors: Aziz Fardin , Jalal Siam Saleh Ahmed , Chakraborty Subashis
Published: April 2024

This research aims to explore the significance of Supplier Relationship Management (SRM) practices in the context of Bangladesh, an emerging economy with a growing manufacturing sector. The study investigates the impact of SRM on supply chain performance, adaptation to local challenges, and key success factors for effective implementation. A qualitative research design was employed, involving in-depth interviews with 35 professionals from diverse organizations in Bangladesh. Thematic analysis was used to interpret the data. The findings revealed that SRM practices in Bangladesh have a positive influence on supply chain performance, emphasizing long-term relationships, cost reduction, quality improvement, and supply stability. Key success factors include clear communication, trust-building, adaptability to local challenges, and navigating regulatory complexities. Participants recommended greater technological integration and training programs for cultural sensitivity and negotiation skills. This research focuses on the specific context of Bangladesh, and the findings may not be universally applicable. Future research can extend the study to other emerging economies for comparative analysis. The study offers practical insights for organizations operating in Bangladesh and similar emerging markets, highlighting the value of tailored SRM practices and the need to balance cost efficiency and supply chain stability. Effective SRM practices contribute to economic growth and job opportunities in emerging economies, fostering social development. This research contributes to the understanding of SRM practices in emerging economies, with a focus on the Bangladesh context, and provides valuable insights for practitioners and researchers in the field of supply chain management. The primary limitation of this study is its focus on a single emerging economy, which restricts the generalizability of the findings. Additionally, the study relies on self-reported data from participants, which may introduce response bias.
A SYSTEMATIC REVIEW OF THE STRATEGIES AND PRACTICES FOR MANAGING TALENT SPECIFICALLY WITHIN THE OIL AND GAS SECTOR IN NIGERIA, FOCUSING ON RECRUITMENT, RETENTION AND DEVELOPMENT
Authors: Eleogu Tobechukwu Fransica , A. Odulaja Bukola , Obinyeluaka Moses Ikechuckwu , Ann Udeh Chioma , Daraojimba Chibuike
Published: April 2024

In the rapidly evolving landscape of Nigeria’s oil and gas sector, effective talent management has emerged as a pivotal component for organizational success. This systematic review delves into the strategies and practices employed for managing talent within this sector, with a concentrated focus on recruitment, retention, and development. Utilizing a comprehensive search of peer-reviewed journals, industry reports, and organizational case studies, the methodology encompassed qualitative analysis. The main findings revealed that while recruitment strategies are increasingly leveraging technological advancements and localized content, retention efforts are centered around competitive remuneration, career progression, and fostering a conducive work environment. Furthermore, development initiatives prioritize continuous learning, leadership training, and skill enhancement. The implications of these findings underscore the necessity for organizations to adapt to the unique challenges of the Nigerian context, emphasizing the importance of aligning talent management strategies with broader business goals to ensure sustainability and growth in the sector.
AWARENESS AND THE INTENTION TO AVAIL VARIABLE UNIT-LINKED INSURANCE POLICIES AMONG RESIDENTS OF SAN PABLO CITY, LAGUNA
Authors: L. Magampon Thelma
Published: April 2024

The main objective of this study is to assess the level of awareness and intention to avail VUL among residents of San Pablo City. An adapted and modified survey questionnaire was used to collect the data and information needed for this investigation. Cronbach’s alpha was used in the results of pilot testing conducted to determine the reliability of the research instrument. The study’s participants include 300 respondents who are potential consumers of variable unit-linked insurance policies. The study may have included both male and female respondents who are of legal age and capable of answering the survey questions. Frequency, percentage, mean, chi-square test, and spearman rho were the statistical methods employed. The research findings suggest that there are notable differences in the insurance buying behaviors of single and married individuals, influenced by factors such as financial priorities and risk perceptions. The study revealed that a significant percentage of the respondents are employed either regularly or on a contract basis. Regarding variable unit-linked (VUL) insurance, the respondents showed some understanding of its advantages but lacked knowledge on selecting the right products, interpreting terms and policies, and comprehending its adaptability as an investment. Based on these findings, insurance providers and agents can design targeted marketing campaigns and educational initiatives to enhance customer understanding of VUL insurance and improve their overall experience. By providing new policies and components benefits that appropriate to their needs. It is necessary to offer clients specific advice and direction so they are able to understand how VUL insurance may be incorporated their overall financial plan.
SUSTAINABILITY OF KADIWA: LINKING FARMERS DIRECTLY TO CONSUMERS
Authors: P. Bombio Mylene
Published: April 2024

This study focuses on the sustainability of the “Kadiwa ni Ani at Kita” program. This program is under the direct supervision of Department of Agriculture, under the government. There two objectives of this program. One is to create a direct system and convenient way of trading with the farmers, which will also ultimately improve their income. The other objective is to offer ultimate consumers low-priced agricultural products by eliminating layers of traders. The study used the quantitative research design using the program as a case study. Data were gathered through face-to-face interviews with open ended questionnaires. The respondents, purposely selected for this study, consisted of fifty farmers in the provinces of Quezon and who are producing high-value crops (vegetables that are in demand in the market). The data were analyzed using simple statistical tolls like mean and standard deviation. The researcher’s initial findings show that one of the main reasons for the majority of farmers’ inability to improve their income is the lack of access to better market prices among others. Results further show that continuous development of “Kadiwa ni Ani at Kita” Program, through an enhanced marketing platform, strategically designed management, and building outlets in adjoining areas will achieve its sustainability. It will benefit the farmers to patronize their agricultural products in the market venture, and for consumers to acquire affordable goods. This paper will be submitted to the Department of Agriculture’s AMAD (Agri-Business and Marketing Assistance Division) in an attempt to help AMAD expand its role and fulfill its mandate of assisting farmers to become agri-preneurs.
THE SIGNIFICANCE OF CUSTOMER SERVICE IN ESTABLISHING TRUST AND ENHANCING THE REPUTATION OF THE BANKING INDUSTRY IN BANGLADESH
Authors: Hasan Md Mehedi , Jalal Siam Saleh Ahmed , Haque Amena
Published: April 2024

This qualitative research study examines the significance of customer service in establishing trust and enhancing the reputation of the banking industry in Bangladesh. The research aims to gain insights into the current state of customer service, its impact on customer trust and the reputation of banks, the challenges faced in providing good customer service, and the strategies that can be adopted to improve customer service practices. Data collection involved in-depth interviews with both customers and employees of a prominent banking institution in Bangladesh. The evaluation of the current state of customer service revealed a mixed picture, with customers generally reporting satisfaction but also identifying areas for improvement such as delays and inadequate facilities. The research findings confirmed the vital role of customer service in building and maintaining trust. Positive customer service experiences were found to enhance customer trust, while negative experiences had a detrimental impact and could lead to customer attrition. The reputation of banks was closely tied to the quality of customer service, as positive experiences resulted in favorable recommendations while negative experiences harmed the bank’s image. Challenges faced by banks in providing good customer service included limited resources, technological integration, communication channels, cultural barriers, and effective complaint management. To address these challenges, strategies such as enhanced staff training, leveraging technology, implementing feedback mechanisms, streamlining complaint handling, fostering a culture of personalized service, and monitoring service quality were recommended. The findings of this research provide valuable insights and recommendations for banks in Bangladesh to improve their customer service practices, enhance customer satisfaction, and ultimately strengthen their reputation in the competitive banking industry. By prioritizing customer service and implementing the recommended strategies, banks can build trust, retain customers, and establish a positive reputation, leading to sustained success in the dynamic banking landscape of Bangladesh.
THE ROLE OF LEADERSHIP ON ORGANIZATION MANAGEMENT: A CASE STUDY OF FIRST BANK IN ABUJA METROPOLIS
Authors: C. Udokwu Samuel Tobenna , Okoye Chinwe Chinazo , Oshioste Ese Eigbadon , Ezinwa Nwankwo Ekene , Azubuike Ngozi Ukamaka
Published: April 2024

The primary objective of the study was to scrutinize the influence of leadership styles on organizational management, focusing on a case study of First Bank in Abuja Metropolis. Primary data sources were employed in the research. The study utilized a survey research design, and the Smart-PLS Regression technique was employed for data analysis. The findings of the study indicated that democratic, autocratic, and laissez-faire leadership styles had a positive and statistically significant impact on the performance of First Bank employees in the Abuja metropolis. Consequently, the study concluded that leadership style exerted a significant influence on the performance of employees in the selected Nigerian bank. The study recommended that organizations should adopt a democratic style of leadership and human management practices to encourage workforce commitment to their duties. While the study recognized that an authoritative leadership style bolsters performance, it was suggested that the organization should elucidate expectations and provide goals and standards to be achieved by the staff. The laissez-faire leadership style was proposed for adoption across all banks as it fosters visionary employees, provides freedom from interference, and simultaneously motivates employees with a high sense of responsibility.
As bibliotecas brasileiras com nomes de bibliotecários (Editorial)
Authors: Cunha Murilo Bastos da
Published: April 2024

O editorial aborda o levantamento realizado sobre as oito bibliotecas brasileiras que receberam o nome de bibliotecários. Essas oito bibliotecas e os bibliotecários homenageados foram comentados no texto. Além disso, são apresentados os artigos incluídos no primeiro número de 2024 da Revista Ibero-Americana de Ciência da Informação.
Formação para o trabalho: categoria central para a definição da identidade das bibliotecas no contexto da educação profissional e tecnológica
Authors: Silva Carlos Robson Souza da , Cavalcante Luciane de Fátima Beckman , Parra Valero Pablo
Published: April 2024

Trata do debate sobre a identidade das bibliotecas no contexto da Educação Profissional e Tecnológica (EPT). O presente trabalho tem como objetivo geral debruçar-se sobre essa temática de maneira a propor uma categoria teórica que possa ser tida como central para a definição da identidade das bibliotecas no contexto da EPT, refletindo a sua singularidade ante às tipologias já existentes. Para isso, realizou-se uma pesquisa teórica, de abordagem qualitativa, com base em uma pesquisa bibliográfica. Para efetivar a pesquisa, agrupou-se e discutiu-se os resultados na seguinte ordem: “Educação Profissional e Tecnológica no Brasil”, e “Formação de trabalhadores como categoria central para a definição da identidade das bibliotecas na Educação Profissional e Tecnológica”. Conclui-se aqui que a discussão sobre a identidade das bibliotecas no contexto da EPT deve iniciar por entendê-las não como meros setores de apoio dentro das IEPTs, mas como unidades essenciais no processo de educação crítica e integral dos estudantes, tendo como ponto de partida a prática social da formação de trabalhadores. Desta forma, mais do que bibliotecas mistas, multiníveis, técnico-acadêmicas ou educativas públicas, as bibliotecas devem ser entendidas como bibliotecas profissionalizantes.
Letramento midiático e informacional e discurso de ódio: uma relação necessária
Authors: Ceretta Soria María Gladys , Cabrera Castiglioni Magela
Published: April 2024

É proposto abordar o vínculo entre letramento midiático e informacional e discurso de ódio. Partindo da premissa de que existe uma relação necessária entre os três conceitos e que eles são essenciais para combater os processos de desinformação e garantir a formação de indivíduos críticos e autônomos para utilizar e avaliar a informação em um âmbito de respeito aos direitos das pessoas. Segundo esta afirmação, pretende-se centrar o estudo em duas linhas de análise, por um lado, a revisão das orientações e principais definições de letramento midiático e informacional para identificar componentes que possam estar diretamente relacionados com o discurso de ódio e, por outro lado, a identificação de pesquisas sobre discurso de ódio e a relação que estas estabelecem com o letramento midiático e informacional. O marco teórico que sustenta a proposta implica a análise dos conceitos mencionados e relacionados para procurar os pontos de encontro que fundamentam a premissa e permitam a geração de conhecimento sobre a temática. Para isso, será utilizada uma metodologia qualitativa que considerará as seguintes ferramentas: revisão e análise bibliográfica, para conhecer a situação da temática; estudo das orientações sobre letramento midiático e informacional para verificar se abordam a questão do discurso de ódio e, em caso afirmativo, de que forma. A partir do estudo e discussão dos resultados decorrentes da metodologia aplicada, serão elaboradas categorias de análise para abordar o assunto e obter os principais resultados. O artigo é essencialmente teórico e pretende sistematizar parte do conhecimento gerado sobre um assunto emergente e que afeta principalmente a grupos vulneráveis de nossa sociedade. Ao mesmo tempo, espera-se contribuir para a geração de alternativas que priorizem a abordagem do discurso de ódio a partir das ferramentas que fornecem o letramento midiático e o letramento informacional. Finalmente, destaca-se que a proposta faz parte do estudo para a geração de uma nova linha de investigação que será realizada pelo Grupo de Pesquisa AlfaInfo.uy da FIC.
SiGe HBT wideband amplifier for millimeter wave applications
Authors: Krˇcmar Marco , Noether Nils , Boeck Georg
Published: April 2024

A wideband amplifier up to 50 GHz has been implemented in a 0.25 μm, 200 GHz ft SiGe BiCMOS technology. Die size was 0.7×0.73 mm2. The two-stage design achieves more than 11 dB gain over the whole 20 to 50 GHz band. Gain maximum was 14.2 dB at 47.5 GHz. Noise figure was lower than 9 dB up to 34 GHz and a current of 30 mA was drawn from a 4 V supply. To the author’s best knowledge this is the highest gain bandwidth product of a monolithic SiGe HBT amplifier ever reported.
Optimizing circular polarization within a beam of patch antenna elements
Authors: Hornik Monika , Hornik, Paweł , Guzda Dominik , Kabacik Paweł
Published: April 2024

The paper presents the results of an investigation into patch antenna elements that would be capable of pro- viding good circular polarization not only in the broadside direction, but also over a wide range of elevation angles.
Modified monopole ring antennas as a solution for HiperLAN1/2 and IEEE 802.11b/g standard devices
Authors: Miskiewicz Anna , Kitliński Marek
Published: April 2024

A compact planar antenna for multisystem ap- plications has been designed and manufactured. A modified feeding method has been used to meet the requirements of modern telecommunications devices. It has been shown, that by adjusting the size of the rings, required allocation of bands is possible. The proposed antenna is suitable for ISM band devices and gives perspectives for multi-standard operation. The antenna has been simulated using MoM 2.5D software Zeland IE3D, next fabricated and measured.
Phased array antennas in MIMO receiver
Authors: Kozłowski Sebastian , Yashchyshyn Yevhen , Modelski Józef
Published: April 2024

In this paper, a computer simulation of a MIMO system comprising phased array antennas (PAA) in all receiving branches is presented. In order to examine the system performance under relatively realistic conditions, a ray-tracing simulator was applied to generate a baseband channel impulse response matrix H. A bit error rate (BER) of two systems utilizing different detection methods: V-BLAST and simple matrix inversion was examined in order to determine phased array antennas applicability. Results of an attempt to determine relationship between BER and properties of particular matrix H realization are also provided.
Technologies for low cost small satellites
Authors: Kurek Krzysztof
Published: April 2024

Paper presents short description of satellite struc- ture and characterization of its subsystems. Review of tech- nologies used in small satellite missions is presented, consid- ering possible solutions in low cost projects. Three common solutions: the use of commercial off the shelf (COTS) compo- nents, miniaturization, remote testing and integration of sub- systems can be used to significantly reduce cost of the satellite.
Control and reconfiguration of satellite formations by electromagnetic forces
Authors: Wawrzaszek Roman , Banaszkiewicz Marek
Published: April 2024

Current concept of interferometric missions assume that they employ formations of spacecraft. The cooperation between members of a multisatellite formation is a challenging problem. One of the main difficulties is to implement a reliable system for position control and actuation. A precise control of the position and orientation of each satellite in the array is a key factor in obtaining high quality images of distant objects. The controlling system should frequently collect data about geometry and kinematics of all array elements and use actuators to keep them as close as possible to their nominal positions. Forces that are required for actuation or array reconfiguration in space can be produced by engines of various types. In most cases chemical propulsion is used, with a drawback of limited fuel resources and a danger of polluting optical elements. In our work, we analyze dynamics of satellite formation flight, in which interaction forces result from electromagnetic fields generated by coils with current. We use simple controller equation proposed by members of MIT team to control a formation of two or three aligned satellites rotating around the array’s mass center.
Summary of SSETI Express satellite mission – gained experience
Authors: Kardach Karol , Wydymus Damian
Published: April 2024

In the following paper we present the results of our input in the first of SSETI space missions: SSETI Express, the predecessor of ESEO mission, which we are currently working on, the experience we have gained from this project and how it can benefit us during the upcoming ESEO mission.
Special size effects in advanced single-gate and multiple-gate SOI transistors
Authors: Ohata Akiko , Ritzenthaler Romain , Faynot Olivier , Cristoloveanu Sorin
Published: April 2024

State-of-the-art SOI transistors require a very small body. This paper examines the effects of body thinning and thin-gate oxide in SOI MOSFETs on their electrical characteristics. In particular, the influence of film thickness on the interface coupling and carrier mobility is discussed. Due to coupling, the separation between the front and back channels is difficult in ultra-thin SOI MOSFETs. The implementation of the front-gate split C-V method and its limitations for determining the front- and back-channel mobility are described. The mobility in the front channel is smaller than that in the back channel due to additional Coulomb scattering. We also discuss the 3D coupling effects that occur in FinFETs with triple-gate and omega-gate configurations. In low-doped or tall fins the corner effect is suppressed. Narrow devices are virtually immune to substrate effects due to a strong lateral coupling between the two lateral sides of the gate. Short-channel effects are drastically reduced when the lateral coupling screens the drain influence.
On-wafer wideband characterization: a powerful tool for improving the IC technologies
Authors: Lederer Dimitri , Raskin Jean-Pierre
Published: April 2024

In the present paper, the interest of wideband characterization for the development of integrated technologies is highlighted through several advanced devices, such as 120 nm partially depleted (PD) silicon-on-insulator (SOI) MOSFETs, 120 nm dynamic threshold (DT) voltage – SOI MOSFETs, 50 nm FinFETs as well as long-channel planar double gate (DG) MOSFETs.
Investigations of electron emission from DLC thin films deposited by means of RF PCVD at various self-bias voltages
Authors: Jarzyńska Dagmara , Znamirowski Zbigniew , Cłapa Marian , Staryga Elżbieta
Published: April 2024

The aim of this paper is to report the results of field emission experiments on undoped, flat diamond-like carbon (DLC) thin films deposited at various self-bias voltages using radio frequency plasma chemical vapor deposition (RF PCVD) technique. It has been observed that the emission properties improve when the absolute value of self-bias voltage becomes higher, e.g., the turn-on field value decreases. The correlation between electron field emission and sp2 content in these films showed improvement of electron emission properties of DLC films for higher amount of sp2 phase.
Application of bioinformatics methods to recognition of network threats
Authors: Kozakiewicz Adam , Felkner Anna , Kijewski Piotr , Jordan Kruk Tomasz
Published: April 2024

Bioinformatics is a large group of methods used in biology, mostly for analysis of gene sequences. The algorithms developed for this task have recently found a new application in network threat detection. This paper is an introduction to this area of research, presenting a survey of bioinformatics methods applied to this task, outlining the individual tasks and methods used to solve them. It is argued that the early conclusion that such methods are ineffective against polymorphic attacks is in fact too pessimistic.
Multi-layered Bayesian Neural Networks for Simulation and Prediction Stress-Strain Time Series
Authors: Krok Agnieszka
Published: April 2024

The aim of the paper is to investigate the differences as far as the numerical accuracy is concerned between feedforward layered Artificial Neural Networks (ANN) learned by means of Kalman filtering (KF) and ANN learned by means of the evidence procedure for Bayesian technique. The stressstrain experimental time series for concrete hysteresis loops obtained by the experiment of cyclic loading is presented as considered example.
SHaPe: A Honeypot for Electric Power Substation
Authors: Kołtyś Kamil , Gajewski Robert
Published: April 2024

Supervisory Control and Data Acquisition (SCADA) systems play a crucial role in national critical infrastructures, and any failure may result in severe damages. Initially SCADA networks were separated from other networks and used proprietary communications protocols that were well known only to the device manufacturers. At that time such isolation and obscurity ensured an acceptable security level. Nowadays, modern SCADA systems usually have direct or indirect Internet connection, use open protocols and commercial-off-the-shelf hardware and software. This trend is also noticeable in the power industry. Present substation automation systems (SASs) go beyond traditional SCADA and employ many solutions derived from Information and Communications Technology (ICT). As a result electric power substations have become more vulnerable for cybersecurity attacks and they need ICT security mechanisms adaptation. This paper shows the SCADA honeypot that allows detecting unauthorized or illicit traffic in SAS which communication architecture is defined according to the IEC 61850 standard.
Analysis of Burst Ratio in Concatenated Channels
Authors: Rachwalski Jakub , Papir Zdzisław
Published: April 2024

Burst ratio is a parameter that quantifies packet loss patterns in transmission networks. It has been defined for an end-to-end scenario, therefore burst ratio can be determined only if the characteristics of the whole transmission path are known. In this paper, the burst ratio parameter applicability to cases when the transmission path consists of a series of transmission channels with known packet loss rate and burst ratio values is extended. The paper also presents the results of simulations performed with NS2 software, demonstrating the validity of the burst ratio analysis. Consequently, the research makes it possible to determine the value of the burst ratio parameter in concatenated packet networks, which in turn supports delivering higher quality VoIP services.
A Novel Technique of Optimization for the COCOMO II Model Parameters using Teaching-Learning-Based Optimization Algorithm
Authors: Khuat Thanh Tung , Le My Hanh
Published: April 2024

Software cost estimation is a critical activity in the development life cycle for controlling risks and planning project schedules. Accurate estimation of the cost before the start-up of a project is essential for both the developers and the customers. Therefore, many models were proposed to address this issue, in which COCOMO II has been being widely employed in actual software projects. Good estimation models, such as COCOMO II, can avoid insufficient resources being allocated to a project. However, parameters for estimation formula in this model have not been optimized yet, and so the estimated results are not close to the actual results. In this paper, a novel technique to optimize the coefficients for COCOMO II model by using teaching-learning-based optimization (TLBO) algorithm is proposed. The performance of the model after optimizing parameters was tested on NASA software project dataset. The obtained results indicated that the improvement of parameters provided a better estimation capabilities compared to the original COCOMO II model.
Application of Social Network Inferred Data to Churn Modeling in Telecoms
Authors: Gruszczyński Witold
Published: April 2024

The subject of this work is the use of social network analysis to increase the effectiveness of methods used to predict churn of telephony network subscribers. The social network is created on the basis of operational data (CDR records). The result of the analysis is customer segmentation and additional predictor variables. Proposed hybrid predictor employs set of regression models tuned to specific customer segments. The verification was performed on data obtained from one of the Polish operators.
Application of Recurrent Neural Networks for User Verification based on Keystroke Dynamics
Authors: Kobojek Paweł , Saeed Khalid
Published: April 2024

Keystroke dynamics is one of the biometrics techniques that can be used for the verification of a human being. This work briefly introduces the history of biometrics and the state of the art in keystroke dynamics. Moreover, it presents an algorithm for human verification based on these data. In order to achieve that, authors’ training and test sets were prepared and a reference dataset was used. The described algorithm is a classifier based on recurrent neural networks (LSTMand GRU). High accuracy without false positive errors as well as high scalability in terms of user count were chosen as goals. Some attempts were made to mitigate natural problems of the algorithm (e.g. generating artificial data). Experiments were performed with different network architectures. Authors assumed that keystroke dynamics data have sequence nature, which influenced their choice of classifier. They have achieved satisfying results, especially when it comes to false positive free setting.
L-SCANN: Logarithmic Subcentroid and Nearest Neighbor
Authors: Ahmad Tohari , Muchammad Kharisma
Published: April 2024

Securing a computer network has become a need in this digital era. One way to ensure the security is by deploying an intrusion detection system (IDS), which some of them employs machine learning methods, such as k-nearest neighbor. Despite its strength for detecting intrusion, there are some factors, which should be improved. In IDS, some research has been done in terms of feature generation or feature selection. However, its performance may not be good enough. In this paper, a method to increase the quality of the generated features while maintaining its high accuracy and low computational time is proposed. This is done by reducing the search space in training data. In this case, the authors use distance between the evaluated point and the centroid of the other clusters, as well as the logarithmic distance between the evaluated point and the subcentroid of the respective cluster. Besides the performance, the effect of homogeneity in extracting centroid and subcentroid on the accuracy of the detection model is also evaluated. Based on conducted experiment, authors find that the proposed method is able to decrease processing time and increase the performance. In more details, by using NSL-KDD 20% dataset, there is an increase of 4%, 2%, and 6% from those of TANN in terms of accuracy, sensitivity and specificity, respectively. Similarly, by using Kyoto 2006 dataset, proposed method rises 1%, 3%, and 2% than those of TANN.
Closed-form Distribution and Analysis of a Combined Nakagami-lognormal Shadowing and Unshadowing Fading Channel
Authors: Singh Rupender , Rawat Meenakshi
Published: April 2024

The realistic wireless channels face combined (time shared) Nakagami-lognormal shadowing and unshadowing fading because of time varying nature of radio channel and mobile user. These channels can be modeled as time-shared sum of multipath-shadowing and unshadowing Rician distributions. These fading create severe problems in long distance wireless systems where multipath fading is superim-posed on shadowing fading (called multipath-shadowing fading). The multipath effect can be modeled using Rayleigh, Rician, Nakagami-m or Weibull distribution and shadowing effect is modeled using lognormal distribution. In this paper, authors present a new closed-form probability distribution function of a Nakagami-lognormal fading channel. Using this result, the closed-form expression of combined Nakagami-lognormal shadowing and unshadowing fading is presented. The obtained closed-form result facilitates to derive the important performance metrics of a communication system such as amount of fading, outage probability, and average channel capacity in closed-form expressions.