bluuebunny/crossref_metadata_2025 huggingface dataset:
Noninvasive Vagal Nerve Stimulation for Opioid Use Disorder
Authors:   Department of Psychiatry & Behavioral Sciences, Emory University School of Medicine, Atlanta GA, Douglas Bremner J
Published: April 2024

Background: Opioid Use Disorder (OUD) is an escalating public health problem with over 100,000 drug overdose-related deaths last year most of them related to opioid overdose, yet treatment options remain limited. Non-invasive Vagal Nerve Stimulation (nVNS) can be delivered via the ear or the neck and is a non-medication alternative to treatment of opioid withdrawal and OUD with potentially widespread applications. Methods: This paper reviews the neurobiology of opioid withdrawal and OUD and the emerging literature of nVNS for the application of OUD. Literature databases for Pubmed, Psychinfo, and Medline were queried for these topics for 1982-present. Results: Opioid withdrawal in the context of OUD is associated with activation of peripheral sympathetic and inflammatory systems as well as alterations in central brain regions including anterior cingulate, basal ganglia, and amygdala. NVNS has the potential to reduce sympathetic and inflammatory activation and counter the effects of opioid withdrawal in initial pilot studies. Preliminary studies show that it is potentially effective at acting through sympathetic pathways to reduce the effects of opioid withdrawal, in addition to reducing pain and distress. Conclusions: NVNS shows promise as a non-medication approach to OUD, both in terms of its known effect on neurobiology as well as pilot data showing a reduction in withdrawal symptoms as well as physiological manifestations of opioid withdrawal.
Inappropriate Shock Due to Subcutaneous Lead Body Fracture: Extraction and Reimplantation
Authors:   Department of Cardiology, GHSIF, Melun, France, Moïni C , Rahim D ,   Department of Cardiology, Antony Private Hospital, France, Belfeki N ,   Department of Internal Medicine, GHSIF, Melun, France, Lefoulon A ,   Department of Cardiology, GHSIF, Melun, France, Poindron D ,   Department of Cardiology, Les Fontaines Clinic, Melun, France, Lellouche N ,   Department of Cardiology, Henri Mondor University Hospital, Creteil, France
Published: April 2024

Subcutaneous Implantable Cardioverter Defibrillator (S-ICD) has been developed as an alternative to Transvenous (TV) devices to reduce lead-related complications leaving the heart and vasculature untouched. Recently, Boston Scientific published a safety notice in December 2020 regarding a subcutaneous electrode risk of fracture. In the following case report, we describe a case report experiencing this complication and present how we proceeded for lead extraction and reimplantation. The procedure remained safe and easy.
Ketamine Use for Sedation in Critically Ill Patients with Coronavirus Disease 2019 (COVID-19) Infection: A Case Series
Authors:   Department of Pharmacy, American University of Beirut Medical Center, Lebanon, Ghaziri Dania , Koubaissi Salwa A ,   Pulmonary and Critical Care Division, Department of Internal Medicine, American University of Beirut Medical Center, Lebanon, Bouakl Imad ,   Pulmonary and Critical Care Division, Department of Internal Medicine, American University of Beirut Medical Center, Lebanon
Published: April 2024

Introduction: Ketamine has been previously used as an add-on analgesic and a sedative agents for the treatment of critically ill surgical patients, resulting in a reduced opioid consumption. During the Coronavirus Disease 2019 (COVID-19) pandemic, a surge of critically ill patients with Acute Respiratory Distress Syndrome (ARDS) requiring mechanical ventilation with deep sedation and paralysis lead to the overuse of first line sedative medications like benzodiazepines and Propofol, exposing them to serious shortages, especially in view of worsening national economic crisis. This dilemma pushed the critical care teams to explore new medications for sedation, resulting in shifting away from the first line therapies to the use of other sedatives, like Ketamine. We describe our experience using Ketamineto maintain an adequate sedation when Midazolam was not available and Propofol contraindicated. Methods: Ketamine was used on four critically ill patients with severe COVID-19 ARDS requiring paralysis. We focused on vital signs variation and quality of sedation during Ketamine use in comparison to Midazolam/Propofol. During the transition period from Midazolam/Propofol to Ketamine, our patients had an acute increase in blood pressure, respiratory rate and heart rate, a drop in their oxygen saturation with ventilator dyssynchrony. Other deteriorations witnessed included new respiratory acidosis and cardiac arrhythmia. Discussion: In comparison to previous successful uses of Ketamine in the Intensive Care Unit ICU, its limited efficacy in our population could be explained by the requirement for neuro-muscular blockade, the high ventilatory drive and the fact that it was used alone. Conclusion: Our experience with Ketamine during drug shortage of first-line sedatives in critically ill patients with COVID-19 ARDS was shown to be insufficient when used alone as an alternative sedative agent compared to Propofol and Midazolam. Further studies with larger sample size are advised before drawing a final conclusion.
Clinical Features and Differential Gene Screening of Invasive Behaviors between Glioma and Brain Metastasis
Authors:   Guizhou Medical University, Guiyang, Guizhou, People’s Republic of China, X Zeng , G Chen ,   Guizhou Medical University, Guiyang, Guizhou, People’s Republic of China, M Dong ,   Department of Neurosurgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, People’s Republic of China, L Feng ,   Department of Neurosurgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, People’s Republic of China, L Chu ,   Department of Neurosurgery, The Affiliated Hospital of Guizhou Medical University, Guiyang, Guizhou, People’s Republic of China, J Liu ,   Guizhou Medical University, Guiyang, Guizhou, People’s Republic of China
Published: April 2024

Objective: To analyze invasive behaviors between glioma and Brain Metastasis (BM), and to screen invasive differentially expressed genes. Methods: Patients diagnosed pathologically with glioma or BM divided into low-grade glioma groups (n = 19), high-grade glioma group (n = 18), and BM group (n = 15). The survival period was determined. The clinical characteristics were retrospectively analyzed to draw Kaplan-Meier survival curve. Glioma and BM samples were obtained for RNA sequencing. By GO, KEGG, PubMed, and GeneCard, invasive genes were theoretical selected. Correlation between invasive genes and pathological grade was performed. The expression level of invasive genes was verified. Results: The survival curve found that the clinical invasive behavior related to short lifetime includes: size, edema range, blood supply, vascular invasion, grade, and Ki 67 expression. Theoretical analysis finally found that the expression levels of CALM3, CAMK2A, CAMK2B, and PRKCG were negatively correlated with pathological grade (P< 0.01), of which CALM3 was highly correlated with BM (P< 0.01). CALM3 mRNA was significantly down-regulated in BM (P< 0.05), and PRKCG mRNA was significantly down-regulated in both glioma and BM (P< 0.05). Conclusion: The clinical invasive behavior between glioma and BM have significantly shortened the median survival time of patients. Down-regulation of CALM3 suggested a higher correlation with BM, meanwhile Down-regulation of PRKCG played a role in glioma and BM The detection of CALM3 and PRKCG may be helpful for invasive behavior and provide a reference for the targeted therapy in glioma and BM.
Patient Satisfaction with Lingualized Occlusion Compared to Bilateral Balanced Occlusion in Conventional Complete Dentures: A Systematic Review
Authors:   Post Graduate, Department of Prosthodontics and Crown & Bridge, MGM Dental College and Hospital, India, Salvi Neelam A , Iyer Janani ,   Professor, Department of Prosthodontics, MGM Dental College and Hospital, India, Nadgere Jyoti B ,   Professor, Department of Prosthodontics, MGM Dental College and Hospital, India, R Prem ,   Professor and HOD, Department of Prosthodontics and Crown & Bridge, MGM Dental College and Hospital, India, BDS Thapar ,   Post Graduate, Department of Prosthodontics and Crown & Bridge, MGM Dental College and Hospital, India
Published: April 2024

Purpose: The purpose of this systematic review is to determine Lingualized Occlusion (LO) as an alternative occlusal scheme for routine complete dentures in terms of patient satisfaction and comfort. Material and Methods: Electronic research was conducted using for articles published between January 1, 2000 and July 31, 2020, search PubMed (including MEDLINE), the Cochrane database, and Google Scholar. The inclusion criteria were used to choose studies relating different occlusal schemes for complete denture. The risk of bias was evaluated using the Cochrane’s Risk of Bias (ROB -2) tool. Results: After applying the inclusion and exclusion criteria 12 articles were systematically reviewed. The random sequence generation domain reveals a high risk of bias in the studies with Nadira et al, Mohammad et al, Deniz et al, Kawai et al and Jiyar et al. These authors did not use computers or computer-generated random numbers or random block assessment for random sequence generation. Low risk of bias was found in the studies with Shirani et al, Hedaiat et al, Abdallah et al, Savvas et al and Caitlin et al as they have used tools such as computers or computer- generated random numbers or random block assessment for random sequence generation for random sequence generation thereby decreasing the bias and improving the quality of their study. Thus, most of the studies included in this systematic review revealed that the patient satisfaction levels were significantly higher for lingualized occlusion as compared to bilateral balanced occlusion. Conclusion: According to this comprehensive review, BBO does not improve satisfaction or masticatory performance. Thus, in terms of quality of life/satisfaction and masticatory function, lingualized occlusion can be deemed a predictable occlusal scheme for complete dentures. As a result, additional research is required to corroborate the study’s findings.
Alternation in the Abundance and Phosphorylation Status of Aquaporin-2 in the Serum Exosome of Patients with Chronic Kidney Disease
Authors:   Department of First Common Laboratory, National Taiwan University Hospital, Yunlin Branch, Yun-Lin, Taiwan, Chung Yao-Te , Kuo Chiung-Hu ,   Department of Laboratory Medicine, National Taiwan University Hospital Chutung Branch, Hsinchu, Taiwan, Tsai Ru-Yi ,   Department of Cardiovascular Center, National Taiwan University Hospital Yunlin Branch, Yun-Lin, Taiwan, Chen Jin-Wun ,   Department of First Common Laboratory, National Taiwan University Hospital Yunlin Branch, Yun-Lin, Taiwan, Li Chin ,   Department of Biomedical Sciences, National Chung-Cheng University, Chia-Yi, Taiwan, Li Wen-Yi ,   Department of Internal Medicine, National Taiwan University Hospital Yunlin Branch, Yun-Lin, Taiwan
Published: April 2024

Background: Exosomes, which are vesicles ranging from 40 to 160 nm in size, are released from cellular membranes and serve as a means of cell-to-cell communication by delivering their contents, such as microRNA and protein, to recipient cells. These extracellular vesicles are present in human blood and urine and their composition can be altered in specific pathogenic conditions. Aquaporin-2 (AQP2) is a critical aquaporin involved in water homeostasis and has been identified as an important biomarker in chronic kidney disease. However, it is unclear whether AQP2 is transported via exosomes. Method: This study included 16 participants with chronic kidney disease and 11 healthy volunteers. Serum exosomes were isolated through polymer precipitation and imaged using transmission electron microscopy. The diameter of purified serum exosomes was measured via flow cytometry, and their identity was further confirmed by identifying exosome markers through immunoblotting. Additionally, the participants’ hepatic B and C virus infection status was determined using chemiluminescent microparticle immunoassay. Results: The precipitation method was utilized to isolate serum exosomes, and successful purification was confirmed through transmission electron microscopy imaging. Size estimation was conducted via flow cytometry, and the presence of exosome markers CD63, TSG101, CD9, and CD81 was confirmed through immunoblotting. Furthermore, the presence of AQP2 was detected in serum exosomes, and its abundance was found to significantly decrease in patients with chronic kidney disease. However, despite the decreased abundance, the percentage of phosphorylated AQP2 at serine 256 was significantly increased. Conclusion: Our findings suggest that changes in the abundance and phosphorylation status of AQP2 on serum exosomes are associated with the development of chronic kidney disease, and could potentially serve as a signal for exosome transport.
Results of the salmon fishery season in Kamchatka Region in 2023
Authors: Bugaev A. V. , Zikunova О. V. , Artyukhina N. B. , Shubkin S. V.
Published: April 2024

Results of salmon fishery in Kamchatka Region in 2023 are overviewed. Data of fishery statistics on catches of pacific salmon are presented, by fishing districts. Feasibility of fishery forecasts is estimated. Seasonal dynamics of landing is shown for the main stocks of five salmon species. The spawning stocks on the eastern and western coasts of Kamchatka are assessed.
Estimation of abundance for migrating juvenile pink salmon in the rivers of Sakhalin and Iturup Islands in 2023
Authors: Kaev A. M. , Dzen G. N. , Ignatiev Yu. I. , Chesnakov N. I. , Sukhonos P. S. , Bobrov I. S.
Published: April 2024

Number of juvenile pink salmon migrated from the spawning grounds in the rivers of East Sakhalin (Dagi, Malaya Khuzi, Kholodny (tributary of Poronay), Lazovaya, Pugachevka, Voznesenka, Ochepukha, Taranai, and Kura) and Iturup Island (Rybatskaya and Olya) was assessed. The downstream migration index was calculated for each of these rivers as the ratio between the number of spawners entered the river and the number of juveniles migrated down. The number of wild pink salmon juveniles from all rivers of the islands was evaluated separately for several local stocks spawned on East Sakhalin and the stock spawned on Iturup Island on the data of pink salmon spawners number for each local stock and the downstream migration index determined for the abovementioned control rivers. The total number of the fry migrated from the rivers of East Sakhalin in 2023 was assessed as 848.0∙106 ind. and from the rivers of Iturup — as 265.4∙106 ind. In addition to wild ones, the fry was released from salmon hatcheries located on East Sakhalin (145.1∙106 ind.) and Iturup Island (152.5∙106 ind.).
Results of economic usage of the pacific salmon resources in the Sakhalin-Kuril region in 2023
Authors: Makoedov A. A. , Kolpakov N. V. , Nikitin V. D. , Zhivoglyadov A. A. , Ignatiev Yu. I. , Antonov A. A.
Published: April 2024

Pacific salmon fishery in the Sakhalin-Kuril region in 2023 is considered. The landing of 78.2.103 t was forecasted but the actual annual catch was 75.8.103 t or 97 % of the forecast. This ratio was the following for the mass species: pink salmon — 34643 t forecasted and 34402 t actually caught (99.3 %), chum salmon — 41650 t forecasted and 39265 t actually caught (94.0 %). Data on escapement of pink salmon producers to the spawning grounds are provided. The run of pink salmon producers was rather weak in the rivers of Aniva Bay and Patience/Terpeniya Bay, but close to mean values or even stronger in other areas of Sakhalin Island. However, low return of pink salmon producers to the coast of Iturup Island was noted; some suggestions about the reasons are discussed. Efficiency of the fishcounting barrier in the Krasnoarmeysky Strait (in Lake Tunaicha basin) is analyzed on the data obtained in 2022–2023. In order to prevent suffocation of chum salmon, installation of the barrier is recommended on August 20–25, with the purposes to count the migrating fish and to remove excessive producers after the mass run beginning (approximately from September 6–10). On the experience in resolving the conflict of interest between fish farms in 2023, the measures for optimal management of commercial fishery are proposed for the Strategy of pacific salmon fishery in Sakhalin Region in 2024 that include appropriate restrictions for fishing when the forecasted values of chum salmon are landed.
Tautomeric Conflicts in Forty Small-Molecule Databases
Authors: Dhaked Devendra Kumar , Nicklaus Marc
Published: April 2024

We have analyzed forty different databases ranging in size from a few thousand to nearly 100 million molecules, comprising a total of over 210 million structures, for their tautomeric conflicts. A tautomeric conflict is defined as an occurrence of two or more structures within a data set identified by the tautomeric rules applied as being tautomers of each other. We tested a total of 119 detailed tautomeric transform rules expressed as SMIRKS, out of which 79 yielded at least one conflict. These transformations include three types of tautomerism: prototropic, ringchain, and valence tautomerism. The databases analyzed spanned a wide variety of types including large aggregating databases, drug collections, and structure collections based on experimental data. All databases analyzed showed intra-database tautomeric conflicts. The conflict rates as percentage of the database were typically in the few tenths of a percent range, which for the largest databases amounts to >100,000 cases per database.
EMOTION WORD DEVELOPMENT OF CHINESE-HERITAGE CHILDREN IN THE US: A CASE STUDY OF LUNA AND AVIA
Authors: Yurou Chang
Published: April 2024

Emotion word competency is a key component of emotional intelligence, specifically, the ability to monitor one’s own and others’ emotions, to differentiate between different emotions, and to use emotional information to guide one’s behavior and thinking. However, the majority of research on emotion words has been conducted with monolingual participants. While emotion word development of monolinguals is well documented, research to date shows no clear-cut answers to the question whether bilinguals, especially, heritage-bilingual children, share the same characteristics on emotion word development with monolinguals. By observing two Chinese inherited language children living in the United States in CLAN corpus, this paper will explore the output of Chinese affective words of bilingual children, in an attempt to compare and explain the similarities and differences between bilingual children and monolingual children in their vocabulary output during the period of two-word stage and the Telegraphic Speech.
FOSSILIZATION OF INTERLANGUAGE AND ITS ENLIGHTENMENT TO ORAL ENGLISH TEACHING
Authors: yuxiaolin Tian
Published: April 2024

Fossilization refers to a permanent cessation of interlanguage learning before the learner has attained target language norms at all levels of linguistic structure and in all discourse domains in spite of the learner’s positive ability, opportunity, and motivation to learn and acculturate into target society. Fossilization of interlanguage is a common phenomenon in second language acquisition. It is also an inevitable problem for language learners, especially when they learn oral English. Therefore, it is of positive significance to analyze the fossilization in interlanguage in second language acquisition, find out the causes of the fossilization, and then figure out its countermeasures. Based on the introduction of fossilization of interlanguage and reasons behind it, this paper elaborates on the manifestation of fossilization in Chinese students’ oral English and gives some practical suggestions to help them overcome fossilization of interlanguage.
TECHNOLOGICAL ADVANCEMENTS IN TERTIARY-LEVEL WRITING: INSIGHTS FROM BANGLADESHI STUDENTS AND THEIR EVOLVING WRITING PRACTICES
Authors: ur Rahim Wakil , Hasan Emon Md Mehedi , Haque Tausif Al
Published: April 2024

This study delves into the incorporation of technology into the writing practices of Bangladeshi tertiary-level students. Its purpose is to gain a comprehensive understanding of how these students employ technology and writing tools for academic and professional writing. Employing a mixed-methods approach, the research combines surveys and interviews to gather rich insights. The findings reveal a strong inclination among these students towards technology, with a pronounced preference for laptop-based devices. Grammarly, a popular writing app, emerges as the dominant tool, significantly impacting students’ writing skills development, grammar correction, vocabulary enrichment, and originality checking. Precise formatting is highlighted as a key element in academic writing. Nevertheless, concerns regarding potential overreliance on technology and its associated drawbacks are expressed. It’s important to note the limitations of this study. The primary focus is on Bangladeshi tertiary-level students, which may constrain the generalizability of the findings to broader contexts. The reliance on self-reported data may introduce response bias. Future research endeavors could address these limitations by diversifying the participant pool and incorporating various research methods for a more comprehensive understanding of the subject. The study’s insights hold significant practical implications for educators and institutions. Acknowledging the prevalence of technology use and students’ favored writing tools, educators can adapt their teaching approaches to align with these technological preferences. Encouraging responsible usage of writing tools and offering guidance on their optimal utilization can address the challenges linked to excessive reliance on technology. In the swiftly evolving technological landscape, understanding the influence of digital tools on writing practices is pivotal for preparing students for academic and professional triumph. The study underscores the shifting role of technology in education and emphasizes the necessity for adaptable teaching approaches that seamlessly integrate digital writing tools into the learning process. This research contributes a distinctive perspective on the writing practices of Bangladeshi tertiary-level students in the context of technological advancements. The extensive examination of preferred writing tools and their perceived benefits enhances the ongoing conversation regarding the evolving realm of writing practices in the digital era. The study offers valuable insights into the preferences and challenges faced by students in this context, adding to the discourse about the intersection of technology and writing instruction.
EXPLORING THE CHALLENGES IN DEVELOPING READING SKILLS AT THE TERTIARY LEVEL: A STUDY IN THE ASIAN EFL CONTEXT OF BANGLADESH
Authors: Rahim Wakil ur , Nipa Meherun Nisa , Sami Samiha Rahman , Haque Emti Sabrin
Published: April 2024

This research Exploring into the multifaceted challenges confronted by tertiary students in developing reading skills within the context of English as a Foreign Language (EFL), with a specific emphasis on the experiences of Bangladeshi university pupils. The focal point of the study revolves around reading strategies and skill development, shedding light on the second language reading concepts of these students. Employing a mixed-methods approach, the investigation incorporates a questionnaire survey administered to students and interviews conducted with three tertiary-level teachers. In the pursuit of a comprehensive understanding, secondary data, drawn from peer-reviewed journal articles, supplements the primary data collection. The amalgamation of questionnaire responses and insights gleaned from interview sessions articulates the perspectives of both students and teachers regarding the challenges associated with reading and its development. The research underscores the current state of tertiary students’ reading strategies, elucidating the issues they encounter and proposing viable solutions. The study elucidates the significance of addressing the challenges faced by Bangladeshi university freshmen in conquering their apprehensions related to reading in English. Through a nuanced exploration of reading fears, the research contributes valuable insights to the ongoing discourse on English language education at the tertiary level. The narrative encompasses the intricacies of reading development, highlighting the shortcomings in reading skills among tertiary students and probing into the factors that precipitate these challenges, such as the dynamics of intensive and extensive reading. Crucially, the research engages with the concept of critical reading and its progressive expansion, elucidating the trajectory of reading skill development at the tertiary level. In conclusion, the study not only encapsulates the existing issues but also offers recommendations for mitigating the challenges associated with reading skills. These insights contribute significantly to the ongoing dialogue on the current state of English language education for Bangladeshi university freshmen, paving the way for a more informed and effective approach to fostering reading proficiency at the tertiary level.
Uso de Iber como herramienta de aprendizaje y análisis de flujos bidimensionales en canales
Authors: Cueva Portal Michel Huber , Cañon Barriga Julio E. , Cea Gómez Luis
Published: April 2024

Los ejemplos visuales y gráficos interactivos de experimentos controlados permiten al alumno resolver problemas, hacer demostraciones, mediciones y otras actividades prácticas y teóricas. Iber es un modelo numérico bidimensional para la simulación del flujo superficial que combina módulos de hidrodinámica, turbulencia, transporte de sedimentos y calidad de aguas, utilizando el método de volúmenes finitos para solucionar las ecuaciones correspondientes. Su interfaz amigable para el pre y pos procesamiento permite crear videos con resultados y visualizar variables en 3D, convirtiéndose en una herramienta docente didáctica, robusta, gratuita, relativamente fácil de usar, práctica y eficaz para modelaciones hidráulicas e hidrodinámicas. En este trabajo presentamos algunos ejemplos numéricos de simulación de flujo en lámina libre como complementos a las prácticas de docencia experimental que se dificultan en muchas instituciones por falta de recursos económicos y humanos, o por el excesivo tiempo de montaje y operación. Los resultados muestran el ahorro de un tiempo considerable frente a los laboriosos e inevitables cálculos iterativos de las numerosas ecuaciones; la versatilidad para introducir, corregir y visualizar datos es un gran avance al momento de tabular y presentar los resultados como si se tratara de una práctica real. Los tiempos de simulación también son muy razonables y están asociados al tipo de problema, método de cálculo, esquema numérico, resultados a obtener, aspectos que pueden modificarse fácilmente durante las sesiones de clase.
gramificación como eje motivador y creativo en la práctica pedagógica en ingeniería
Authors: Mora Pedreros Tania Isadora , Zapata Hoyos Esperanza
Published: April 2024

Desde la infancia, los niños ven que el juego y el aprendizaje están muy ligados, ¿por qué no seguir aplicando esta estrategia en edad más adulta? En este artículo es descrita una propuesta de innovación para implementar la gamificación como estrategia lo que permite  la incorporación de nuevas prácticas educativas en el aula. Todo esto encaminado a incentivar el proceso creativo y la motivación en los estudiantes para la realización de sus actividades de una manera más atractiva. Partiendo de esto, se realiza una exploración de los diversos conceptos de gamificación y como se aplican en la educación, encontrando diversidad de autores que toman la gamificación como un elemento fundamental para motivar al estudiante a realizar un aprendizaje significativo apropiado. Es así como se plantea una estrategia gamificada, tomando como temática principal el argumento de la película con la que los estudiantes se encuentran muy relacionados, siendo este el punto de partida de la motivación.
Trabajos de fin de grado de ingeniería: estructura, estilo y movidas retóricas
Authors: Flores Aguilar María Dolores , Quiñonez Osuna José Ramón
Published: April 2024

Los trabajos de fin de grado en ingeniería varían dependiendo del sistema educativo. En México, de los años noventa a la fecha se han diversificado sus modalidades. El informe técnico de residencia profesional (ITRP) es una opción para graduarse de institutos tecnológicos federales mexicanos en pregrado. Se muestran los resultados del análisis de 19 ITRP de Ingeniería Mecánica. Los informes fueron asesorados por seis profesores de base. Se describe la estructura de los documentos, su estilo y las movidas retóricas [1] de las introducciones y conclusiones. Las estructuras y estilos de los informes varían entre ellos. En las introducciones de los ITRP analizados se enfatiza el área donde fueron realizadas las actividades y es infrecuente la aparición del tópico principal y detectar la problemática a abordar. Es hasta la conclusión donde aparece la relevancia de la temática como prototípica, a diferencia de lo que ocurre en las tesis.
Tendencias temáticas de investigación sobre MOOC en el ámbito colombiano: revisión sistemática
Authors: Díaz Pérez Vianney Rocío , Barrios Tao Hernando , Guerra Yolanda M.
Published: April 2024

El uso de los cursos masivos y abierto en línea o MOOC (Massive Open Online Courses) en la educación superior como alternativa formativa, simultánea y/o complementaria se ha incrementado en las últimas décadas, al igual que la productividad académica sobre los elementos que constituyen estos cursos. En este artículo son presentadas las tendencias temáticas investigativas sobre MOOC en la educación superior colombiana, para lo cual se realizó una revisión sistemática (2015-2020) en bases de datos tipo Scielo, Redalyc y Google Académico para publicaciones nacionales o escritos desde instituciones colombianas. Los resultados permitieron identificar tendencias en investigación sobre MOOC: caracterización; alternativa académica para la educación superior; diseño, evaluación y pedagogía; factores de calidad; efectos psicológicos, pedagógicos y sociológicos; aspectos de financiación y sostenibilidad; factores de deserción. Las conclusiones indican que estos cursos son una alternativa para democratizar el conocimiento, por lo que es necesario ahondar en el diseño de estrategias que aumenten la tasa de terminación, en tanto la deserción es el mayor reto a afrontar.
About Methodius Ivanovich Grudinin – researcher of basites and hyperbasites of Siberia and teacher of fundamentals of geology
Authors:   Institute of the Earth's Crust SB RAS, Rasskazov S.V.
Published: April 2024

The author of the paper have been in touch with Prof. Grudinin for a long time and characterizes the Grudinin’s contribution to study of basic and ultrabasic rocks in Southern Siberia and on training of students at the geological faculty of Irkutsk State University.
Theory of scattering by an array of lossy dielectric, ferrite and conducting cylinders
Authors: Polewski Michał , Mazur Jerzy
Published: April 2024

Theory of scattering by lossy dielectric, ferrite and/or conducting cylinders is investigated using a combination of an iterative scattering procedure and the orthogonal expansion method. The addition theorems for vector cylindrical harmonics, which transform harmonics from one coordinate system to another, are presented.
Optimal site and antenna location for UMTS - output results of 3G network simulation software
Authors: Nawrocki Maciej J. , Więckowski Tadeusz W.
Published: April 2024

The paper presents output results of 3G network simulation software in the area of optimal site location as well as finding optimal values of antenna tilt. The loss of capacity is shown for a wide range of tilts and different antenna directions. Nonuniform distribution of base stations has been also included in the simulation scenarios influencing system performance. All of the described parameters are especially significant to CDMA systems network planning.
Synthesis method for distributed amplifiers
Authors: Zólomy Attila
Published: April 2024

New design method is presented for distributed amplifiers (DA). It is shown that by proper design of the applied transmission lines (TL) between the active devices the image impedance and the cut-off frequency COF of the input or output line of the DA can be independently tuned. As a consequence, the phase mismatch between the lines of the DA can be adjusted independently from the termination conditions and from the capacitances of the applied transistor and thus flat gain characteristic can be achieved. The method is well applicable for nearly unilateral devices like HBTs [1] and yields the highest gain-bandwidth product.
Fully spatial and SNR scalable, SPIHT-based image coding for transmission over heterogenous networks
Authors: Danyali Habibollah
Published: April 2024

This paper presents a fully scalable image coding scheme based on the set partitioning in hierarchical trees (SPIHT) algorithm. The proposed algorithm, called fully scalable SPIHT (FS-SPIHT), adds the spatial scalability feature to the SPIHT algorithm. It provides this new functionality without sacrificing other important features of the original SPIHT bitstream such as: compression efficiency, full embeddedness and rate scalability. The flexible output bitstream of the FS-SPIHT encoder which consists of a set of embedded parts related to different resolutions and quality levels can be easily adapted (reordered) to given bandwidth and resolution requirements by a simple parser without decoding the bitstream. FS-SPIHT is a very good candidate for image communication over heterogenous networks which requires high degree of scalability from image coding systems.
Linear quadratic power control for CDMA systems
Authors: Anderson Michael David , White Langford B.
Published: April 2024

In this paper, we present a robust decentralized method for jointly performing channel estimation and closed loop power control for the reverse link of CDMA networks. Our method, based on linear quadratic Gaussian (LQG) control systems theory and Kalman filtering, does not require any training symbols for channel or signal to interference ratio (SIR) estimation. The main interest of this new scheme is that it improves the performance of current SIR based power control techniques while avoiding the problem of power escalation, which is often observed in current systems.
LPAR: an adaptive routing strategy for MANETs
Authors: Abolhasan Mehran , Wysocki Tadeusz Antoni , Dutkiewicz Eryk
Published: April 2024

This paper presents a new global positioning system (GPS)-based routing protocol, called location-based point-to-point adaptive routing (LPAR) for mobile ad hoc networks. This protocol utilises a 3-state route discovery strategy in a point-to-point manner to reduce routing overhead while maximising throughput in medium to large mobile ad hoc networks. In LPAR, data transmission is adaptable to changing network conditions. This is achieved by using a primary and a secondary data forwarding strategy to transfer data from the source to the destination when the condition of the route is changed during data transmission. A simulation study is performed to compare the performance of LPAR with a number of different exisiting routing algorithms. Our results indicate that LPAR produces less overhead than other simulated routing strategies, while maintains high levels of throughput.
Design of filterbank transceivers for dispersive channels with arbitrary-length impulse response
Authors: Mertins Alfred
Published: April 2024

This paper addresses the joint design of transmitter and receiver for multichannel data transmission over dispersive channels. The transmitter is assumed to consist of FIR filters and the channel impulse response is allowed to have an arbitrary length. The design criterion is the maximization of the information rate between transmitter input and receiver output under the constraint of a fixed transmit power. A link to minimum mean squared error designs for a similar setting is established. The proposed algorithm allows a straightforward transmitter design and generally yields a near-optimum solution for the transmit filters. Under certain conditions, the exact solution for the globally optimal transmitter is obtained.
A solution for increasing data rate of Doppler-RAKE system
Authors: Modelski Józef , Nguyen Minh Nguyen
Published: April 2024

Doppler-RAKE detection in the CDMA system has been further developed and offers better performances in comparison to conventional RAKE detection, especially in fast-fading environments. Also, the multi-user Doppler-RAKE system works more effectively with channel coding applications. However, by means of exploring the Doppler effect, the system`s data rate is decreased. We propose a simple solution to increase the data rate for the system while keeping the Doppler gain.
Optimization algorithm for reconfiguration process of the IP over optical networks
Authors: Hoang Nghia Le
Published: April 2024

The IP over optical (IPO) network is becoming one of the most interesting among all proposed models of transport networks nowadays. In an IPO network, the reconfiguration capability of the network could be used in order to balance the load of its network elements (NEs). Reconfiguration operations (i.e., switching in OXC nodes and rerouting in IP routers) take place in real-time. Consequently, intensive changes in NEs settings might cause failures in the existing connections in the network. For that reason, changes in NEs settings should be coordinated in a reconfiguration process. In this paper, the author has proposed an optimization method for such reconfiguration process. The mathematical model of the method including computation results has been presented.
Some variants of projection methods for large nonlinear optimization problems
Authors: Białoń Paweł
Published: April 2024

Two ideas of modifying projection methods for the case of smooth nonlinear optimization are presented. Projection methods were originally successfully used in solving large-scale linear feasibility problems. The proposed instantiations of projection methods fall into two groups. One of them is a decomposition approach in which projections onto sets are realized as optimization problems which themselves involve much portions of original problem constraints. There are two subproblems: one build with linear constraints of the original problem and the second one build with original nonlinear constraints. These approaches use special accelerating cuts so that the separation of nonlinear and linear constraints can be effective and some problem sparsity preserved. The second group bases on penalty-shifting/multiplier methods and draws from the observation that unconstrained subproblems obtained there may solve very slowly due to their nonsmooth character. Thus it is proposed to solve them with modified projection methods which inherit from conjugate gradient methods a multi-dimensional subspace in one epoche.
Application of multiple criteria evolutionary algorithms to vector optimisation, decision support and reference point approaches
Authors: Szczepański Marcin , Wierzbicki Andrzej Piotr
Published: April 2024

Multiple criteria evolutionary algorithms, being essentially parallel in their character, are a natural instrument of finding a representation of entire Pareto set (set of solutions and outcomes non-dominated in criteria space) for vector optimisation problems. However, it is well known that Pareto sets for problems with more than two criteria might become complicated and their representation very time-consuming. Thus, the application of such algorithms is essentially limited to bi-criteria problems or to vector optimisation problems with more criteria but of simple structure. Even in such cases, there are problems related to various important aspects of vector optimisation, such as the uniformity of representation of Pareto set, stopping tests or the accuracy of representing Pareto set, that are not fully covered by the broad literature on evolutionary algorithms in vector optimisation. These problems and related computational tests and experience are discussed in the paper. In order to apply evolutionary algorithms for decision support, it would be helpful to use them in an interactive mode. However, evolutionary algorithms are in their essence global and of batch type. Nevertheless, it is possible to introduce interactive aspects to evolutionary algorithms by focusing them on a part of Pareto set. The results of experimental tests of such modifications of evolutionary algorithms for vector optimisation are presented in the paper. Another issue related to vector optimisation problems with more than two criteria is the computational difficulty of estimating nadir points of Pareto set. The paper describes the use of diverse variants of evolutionary algorithms to the estimation of nadir points, together with experimental evidence.
Web-based e-learning environment
Authors: Miˇsoviˇ Milan
Published: April 2024

Using a progressive information technologies for development of web-based courses and their administration brings a lot of practical and theoretical problems. We know web course problem is only small solution concerning construction of a large entire web-based e-learning environment. One of a practical problem is how to construct web-based electronic courses that have to meet international AICC standards. Implementation of such strict statements resulted in a lot of small or larger difficulties if we had used an elementary HTML editor. Using a~special web course oriented editors can absolutely solve this problem. The second problem is construction of the web-based e-learning application that can administrate such web courses and takes into consideration AICC regulations. Development of such web applications is founded on the latest web technologies. This article introduces one approach to the modeling of the two most important components (web-based course, web-based application) of the web-based e-learning environment, convenient for Military Academy in Brno and Czech army. The article outlines the structure of web subject, e-learning environment and their implementation. The LMS`s structure and its functionality, based on a snaps algebra, belong to important results of the article.
Students' Responses To Using Pictionary Games of Vocabulary Instructional Media
Authors: Miranty Delsa , Fatmawati Amelia Yustina , Hamer Welliam
Published: April 2024

This paper presents a study that was undertaken to investigate the students' reactions towards the utilization of Pictionary games as a form of vocabulary educational media. The research was conducted among tenth-grade students at MAN 1 Lebak. The present study employed a descriptive quantitative approach as its chosen research methodology. The participants in this study consisted of students enrolled in class X at MAN 1 Lebak. A sample of 37 students was selected from the population of students in 10 MIA 2. The research data utilized in this study consisted of questionnaire responses obtained from students. These responses were collected to gather insights on the implementation of Pictionary games as a means of vocabulary instructional media. The results of the study indicate that the utilization of Pictionary games elicited a favorable response from the students in terms of enhancing their vocabulary proficiency. The use of Pictionary games was found to be effective in strengthening students' vocabulary skills and fostering an enjoyable learning experience.
Teaching & Learning Written Comprehension in French at Post-Fundamental Level: Bujumbura City Hall
Authors: Mperejimana Adelin
Published: April 2024

This article seeks to address the contribution of teaching and learning written comprehension in the new perspective of post-fundamental education recently implemented in Burundi. The students do not understand the message conveyed in the text and have missed the main thrust of the text. This problematic raised led us to ask questions and make possible hypotheses. Among the obstacles to reading comprehension are a lack of vocabulary, linguistic and semantic knowledge, and so on. To make our work effective, we used the questionnaire method, addressed to teachers of the 3rd post-fundamental language in Bujumbura town hall. Another scientific method used was the observation method, which consists in verifying the practical realities of teacher-learner interactions, as well as the methodological approaches implemented in a text lesson. To analyze the results obtained, the quantitative method was used. This method of analysis enables us to arrive at results which stipulate that learners are unable to understand what is written due to a lack of vocabulary, syntactic and semantic knowledge, extralinguistic, problems in the classroom, methodology, lack of support notebooks and problems in reading books. On the whole, students experience difficulties in reading comprehension due to a lack of lexical, linguistic and literary mastery. In this research, we have identified the problems of developing written comprehension among students in the 3rd year of post-fundamental education. These obstacles are related to the lack of vocabulary, linguistic and extralinguistic semantic knowledge, and grammatical structures. These factors remain a hindrance for students in written comprehension.
An Analysis Of Code Mixing And Code Switching On Najwa Shihab Podcast “Susahnya Jadi Perempuan” (Catatan Najwa)
Authors: Situmorang Korinthya Exaudia , Pasaribu Tiara Kristina , Sembiring Rony Arahta
Published: April 2024

This research focuses on analyze the occurrence of code-mixing and code-switching in Najwa Shihab's podcast episode entitled "Susahnya jadi Perempuan" (Catatan Najwa). The podcast episode discusses various challenges and experiences faced by women in society. This research aims to identify the types and how code-mixing and code-switching are used in the podcast. To achieve this, the authors used a qualitative descriptive method based on Muysken's theory and Poplack's theory.  The data were then categorized based on the types of code-mixing and code-switching, such as Insertion, Alternation, and Congruent Lexicalitation code-mixing as well as Inter-sentential switching, tag switching and Intra-sentential switching. The data obtained from this podcast amounted to 87 data. The results are as follows; there are 62 code mix data consisting of 46 (74%) insertion data, 10 (16%) alternation data, and 6 (10%) congruent lexicalization data. Furthermore, there were 25 code switching data found, which consisted of 9 (36%) inter-sentential switching data, 3 (12%) tag switching data, and 13 (52%) intra-sentential switching data. The authors found that the use of code-mixing and code-switching in this podcast was greatly influenced by the person, such as, the social environment of Najwa and her guest stars. A notable finding from the research is the evident influence of the speakers' social environment on their linguistic choices. Specifically, the interactions between Najwa and her guest stars, coupled with the thematic content of the episode, played a pivotal role in shaping the patterns of code-mixing and code-switching observed. This expanded research offers a deeper understanding of the dynamic interplay of languages in contemporary media formats, emphasizing the significance of sociolinguistic factors in shaping linguistic choices. The study not only contributes to the existing body of knowledge on code-mixing and code-switching but also underscores the importance of analyzing modern mediums to capture the evolving nature of linguistic practices.