bluuebunny/crossref_metadata_2025 huggingface dataset:
Operating Systems (OS): An Insight Investigative Research Analysis and Future Directions
Authors: Bin Akhtar Zarif
Published: October 2024

In the realm of technological computing, the pivotal interface of operating systems (OS) governs the orchestration of machinery, orchestrating seamless human interactions with the swiftly advancing array of device peripherals. Over decades, the intricacies of computing have undergone a profound metamorphosis, embracing monumental leaps facilitated by the progressive proliferation of operating system distributions. From the erstwhile colossal processing units to the present-day intricately crafted nano-fabricated microcontrollers, motherboards, and chipsets, all human-computer interactions gravitate towards the nuanced tapestry of OS distributions and intricately woven source-coded programming. This comprehensive research endeavors to undertake a meticulous exploration of the myriad typologies of operating systems, intricately dissecting their distinctive functionalities and performance metrics, with a discerning focus on aligning specific user profiles with the most fitting OS distributions. Moreover, this investigation seeks to unravel the labyrinthine landscape of OS distributions, illuminating the optimal pathways for both seasoned users and neophytes alike.
Identifikasi Pengenalan Wajah Berdasarkan Jenis Kelamin Menggunakan Metode Convolutional Neural Network (CNN)
Authors: Chalista Imanuela Natun Natasya , Angelica Santhia Maria , R. Kaesmetan Yampi
Published: October 2024

Wajah merupakan komponen yang paling mudah dikenali dan sering kali menjadi pusat perhatian dalam tubuh manusia. Sering terjadinya kesulitan dalam membedakan dan menganalisis citra wajah dengan jumlah yang banyak secara manual karena banyaknya kemiripan antara laki-laki dan perempuan sehingga memperlambat proses identifikasi jenis kelamin. Penelitian ini bertujuan untuk meningkatkan akurasi dan mengimplementasikan identifikasi jenis kelamin dalam pengenalan wajah melalui penerapan metode Convolutional Neural Network (CNN), sebuah algoritma deep learning yang efektif untuk deteksi objek. Dengan mengumpulkan dan memproses dataset citra wajah yang dilabeli berdasarkan jenis kelamin, serta melakukan pra-pemrosesan data yang cermat, model CNN dilatih dan diuji untuk mencapai tingkat akurasi yang signifikan dalam identifikasi jenis kelamin. Hasil penelitian menunjukkan bahwa metode ini dapat meningkatkan kinerja sistem pengenalan wajah berdasarkan jenis kelamin secara praktis. Selain itu, penelitian ini juga memberikan rekomendasi untuk meningkatkan akurasi lebih lanjut dan eksplorasi teknologi terkini dalam upaya mengoptimalkan aplikasi pengenalan gender di masa depan. Abstrak ini merangkum kontribusi utama dan keunikan dari penelitian serta fokus pada elemen-elemen penting seperti penggunaan CNN, pengumpulan dan pelabelan dataset, serta potensi implementasi dan rekomendasi pengembangan lebih lanjut. Meskipun banyak penelitian menggunakan metode CNN, artikel ini mungkin menggunakan versi atau arsitektur CNN yang lebih baru dan dioptimalkan, yang meningkatkan kinerja dalam tugas pengenalan jenis kelamin.
Membangun Sistem Katalog Digital untuk Perpustakaan SMP: Solusi Tepat Mempermudah Pencarian Buku
Authors: Bagaskara Mahendra , Sutomo Erwin , Ayuningtyas Ayuningtyas
Published: October 2024

Perpustakaan merupakan salah satu unsur penting dalam proses belajar mengajar. Mendapatkan sumber belajar yang tepat dapat membantu proses tersebut. Apabila siswa atau guru kesulitan mendapatkan buku sebagai sumber belajar, proses tersebut dapat terganggu. Penelitian ini bertujuan merancang dan membangun aplikasi katalog buku perpustakaan berbasis web di salah satu SMP Sidoarjo. Permasalahan utama perpustakaan terletak pada sistem katalog manual yang rentan kesalahan, memudarnya isi buku, dan proses pencarian yang lama. Aplikasi ini dikembangkan menggunakan framework CodeIgniter dan mengikuti metodologi SDLC untuk memastikan kelancaran proses pengembangan. Hasil pengujian menunjukkan aplikasi berhasil memvalidasi data dan diharapkan dapat meningkatkan efisiensi dan efektivitas pengelolaan katalog, serta memberikan kemudahan akses bagi pengguna.
Production of Biomass and Lipid Yields of Chlorella sp. Cultivated in Autotrophic and Mixotrophic Media
Authors: Díaz Santiago Karla Eugenia , López de Paz Pascual , Rosales Quintero Arnulfo , Espinosa López Paris Hiram , Orantes Calleja Paula Deyanira , Vilchis Bravo Héber
Published: October 2024

In this work, we analyze the biomass and lipid yields of Chlorella sp., when it grows in synthetic wastewater with and without nitrogen limitation and in both cases, adding glucose to both medium, autotrophic and mixotrophic. Our results confirm that it is possible to expand their possibilities of use, which range from their use for the bioremediation of bodies of water to obtaining various biofuels due to their high content of lipids and carbohydrates. It was identified that both the biomass and lipids were higher in the media with mixotrophy with 535.71 mg L-1 and 244.60 mg L-1, respectively. Similarly, the importance of nitrogen present in the growth medium was recognized as a determining variable for the accumulation of lipids in the species, while it is concluded that the use of Chlorella sp. eliminates a significant percentage of nitrogen and phosphorus present in wastewater, thereby reducing nutrient contamination. The nutrient stress to which the microalgae were subjected allowed a greater accumulation of lipids in the cells, which leads to the conclusion that in a large-scale study, Chlorella sp. It could be used as a raw material to obtain oils and their subsequent transformation into biodiesel.
Prevalencia de Depresión Perinatal en Mujeres Embarazadas de 15 a 45 Años Adscritas a la UMF 47, de León Guanajuato en el 2024
Authors: Hernández Huerta Eunice , Galeana Castro Christian , Orozco Torres Gisela Berenice
Published: October 2024

Objetivo: Determinar la prevalencia de depresión perinatal en mujeres embarazadas de 15 a 45 años en la UMF 47 en el año 2024, Se realizó un estudio con enfoque Cuantitativo, Observacional, Transversal, Prospectivo y Descriptivo. Se realizó el cálculo muestral con el uso de la fórmula para el cálculo de una proporción, se obtuvo una muestra: 264 derechohabientes adscritas a la unidad, sin embargó se obtuvo una muestra total de 304 pacientes, debido a la aceptación de las derechihabientes. Se realizo estadística descriptiva con uso de medidas de tendencia central para las variables cuantitativas y las cualitativas rangos y frecuencias, se realizó el análisis estadístico en el SPSS 26. Resultados: 304 mujeres derechohabientes embarazadas adscritas a la Unidad de Medicina Familiar no. 47 encuestadas, se obtuvo una prevalencia conformada por un grupo de pacientes sin depresión con n= 231 (76%), un grupo de pacientes con probable depresión con n= 73 (24%), con un promedio de 24/25 años (9%), casada (43%), secundaria (41%), hijos 0 (41%), primigesta (35%). Obteniendo mayor relacion los factores socioculturales en relación con la aparición de sintomas de depresión. Conclusiones: esta investigación realizada en la UMF no. 47, de León, Guanajuato; encontró nuestro sujeto de estudio mas frecuente; una mujer de 24/25 años, Casada, escolaridad secundaria, primigesta o un hijo.
Aneurisma Gigante de Aorta Ascendente con Debut Clínico como Síndrome De Vena Cava Superior. A Propósito de un Caso Clínico y Revisión del Tema
Authors: Terán Carbonó Efraín De Jesús , Villalba Morón Vanessa Johana
Published: October 2024

Introducción: El aneurisma gigante de la aorta ascendente es una afección poco frecuente, puede cursar con variedad de presentaciones, desde asintomática, con sintomatología gradual y poco específica, o en su forma más mortal: con clínica aguda, encontrándose dentro de los más llamativos el síndrome de vena cava superior. Presentación del caso: Se expone el caso de una paciente de 93 años quién presentó signos de dificultad respiratoria, asociados a edema facial y de miembros superiores; con diagnóstico imagenológico de aneurisma gigante de aorta torácica (10cm de diámetro), con debut en forma de síndrome de vena cava superior moderado, para el cual se optó por realizar un manejo conservador dado por grupo etario, características del aneurisma y complicaciones derivadas de sus antecedentes patológicos de base. Conclusión: El aneurisma gigante de aorta ascendente es una entidad clínica poco frecuente. Los factores de riesgo y la historia familiar son variables para tener en cuenta ante la sospecha clínica. La implementación de estudios por imagen es elemental para el diagnóstico. La identificación y estadificación oportuna del tipo de presentación clínica resulta fundamental para determinar de manera oportuna el tipo de abordaje terapéutico a implementar, sea invasivo o conservador
O PAPEL DO SECRETARIADO EXECUTIVO NAS ORGANIZAÇÕES: UM ESTUDO DE CASO
Authors: Terra Penha Maria Mendes
Published: October 2024

Este estudo de caso examina o papel dos secretários executivos nas organizações modernas, focando em suas contribuições para a eficiência operacional e a eficácia gerencial. A pesquisa, conduzida por meio de entrevistas semiestruturadas com 10 profissionais de secretariado e 5 executivos, identificou competências essenciais como comunicação, organização, gestão do tempo e proficiência em tecnologia, além dos desafios enfrentados. Os resultados destacam a importância contínua do desenvolvimento dessas competências para melhorar a comunicação interna e apoiar estratégias organizacionais. O estudo sugere que, para enfrentar os desafios identificados, é primordial um investimento constante na formação e atualização das habilidades dos secretários executivos.
Communication Strategy in Social Conflict Resolution of Residents Affected by the Indonesian Capital City
Authors: Sutanto Margono Hadi , Djalil Nur Alim , Sukmarini Andi Vita
Published: October 2024

This research investigates communication strategies between the residents of Nusantara Capital City developmental areas and other groups as they continue grappling with social conflict after the relocation to East Kalimantan. This research was carried out at Security and Social, Cultural, and Community Development of Nusantara Capital City Authority, Deputy. Record data was undertaken through the following processes: face to face interviews with informants, observation and documentation to acquire the necessary data. This type of research employs qualitative research. This study findings establish the fact that most social issues affecting residents and leading to conflict can be dealt with by the strategies employed by the Nusantara Capital Authority through the Deputy Social, Cultural and Community Empowerment. The techniques employed in dealing with social conflict within residents that have been displaced by development of the Nusantara Capital City are are categorized under communication strategies currently classified as informative, persuasive, instructive and human relations communication. Of the strategies involved in the approach, persuasive communication strategies are predominant in managing social conflicts that occur among residents who are affected by the development of the Nusantara Capital City and can influence drastic changes in the behaviour of some of the affected residents who are against development of the Nusantara Capital City. Some of the key determinants for impact of communicable goals type of strategy are Credibility/ Trust; Clear Message and Media used for conveying information, social media as well as the electronic media.
Implementation of Strategic Risk Management in Improving the Quality of Services
Authors: Saputro Lukasiwan Eddy , Suyuthi Nurmadhani Fitri , Muin Sri Adrianti
Published: October 2024

Lukasiwan Eddy Saputro. “Implementation of Strategic Risk Management in Improving Service Quality at Ratu Aji Putri Botung Penajam Paser Utara Hospital” (Supervised by. (Nurmadhani Fitri Suyuthi and Sri Adrianti Muin). This study aims to determine the Application of Strategic Risk Management in Improving the Quality of Services of Ratu Aji Putri Botung Hospital Penajam Paser Utara. This research was conducted at Ratu Aji Putri Botung Hospital North Penajam Paser. Data collection was done through observation, interviews, and documentation. This research data was analyzed using qualitative descriptive analysis to answer the formulation of research problems. Descriptive data obtained from observations, interviews, and documentation research will be analyzed. The results of this study found and showed that the Implementation of Strategic Risk Management at Ratu Aji Putri Botung Hospital has been proven to improve the quality of health services by optimizing operational efficiency and improving patient safety. Through risk identification and mitigation, the hospital is able to reduce medical errors and resource shortages. Despite the positive impact, there is room for improvement, such as increased staff training, utilization of information technology, and active involvement of leadership in the risk management process. With these measures, the RSUD can continue to strengthen its risk monitoring and evaluation system to provide higher quality and sustainable healthcare services.
Management Strategy in Public Services at the Civil Registry Office
Authors: Rasmika Rasmika , Mujahid Mujahid , Suyuthi Nurmadhani Fitri
Published: October 2024

This study aims to analyse management strategies in public service at the Dukcapil Office of Penajam Paser Utara Regency. The focus of this research is to evaluate the strategies implemented to enhance the quality and efficiency of public services related to population registration, civil registration, and data management. Understanding these strategies is expected to provide valuable recommendations for improving services in the future. The research employs a qualitative approach, conducting in-depth interviews with key informants including the Head of Data Utilization and Service Innovation, the Head of Population Registration, the Head of Civil Registration, the Head of Population Administration Information Management, and members of the general public. Data were collected through interviews and direct observation. Data analysis was performed using interactive model techniques, allowing for comprehensive insight and understanding of the applied management strategies. The results reveal that the Dukcapil Office of Penajam Paser Utara Regency has implemented a comprehensive management strategy in public service. Thorough planning, including the integration of technology and online systems, facilitates highly efficient population registration and civil registration processes. Effective organization ensures that human resources and technology are well-managed to achieve service goals. Guidance through training and simulations ensures that staff perform their duties competently. Control is exercised by monitoring and evaluating systems and staff performance to maintain service quality. These strategies have enhanced the quality and efficiency of public services, providing greater convenience and trust to the public in the administration of population and civil registration in Penajam Paser Utara Regency.
Using a Yolov8-Based Object Detection Model for an Automatic Garbage Sorting System
Authors: Pham Quoc Thien , Nguyen Lam Thanh Tuan , Nguyen Quoc Van , Barlin Barlin , Lu Sheng-En , Liou Nai-Shang
Published: October 2024

This study presents the development of an automatic garbage sorting system based on computer vision techniques and the You Only Look Once version 8 (YOLOv8) algorithm. RGB images of garbage, including cans and plastic bottles, were collected by a camera. The YOLOv8 model, trained on a dataset of both RGB images of cans and plastic bottles, acts as the core for detection and classification. During real-time sorting, the classification results and picking points from the YOLOv8 model are used by a gantry robot. The gantry robot is developed and controlled by a Programmable Logic Controller (PLC) to place each type of garbage into its respective categories. A conveyor tracking algorithm was implemented to pick up garbage moving on the conveyor. The system's performance is evaluated using 20 garbage samples for the can and the plastic bottle category. The accuracy, precision, recall, and F1 score were 92.5%, 90.5%, 95%, and 92.7%, respectively. The system proposed in this study can be modified to sort other garbage types.
Experimental Tests of Slope Failure due to Rainfall using Physical Slope Modeling
Authors: Raut Jayant Raut , Pande Prashant , Vasudeo Avinash , Bhagat Rajesh , Bahoria Boskey , Kurjekar Atul
Published: October 2024

In order to investigate the damage due to slope failure is very important. The main aim of this study is to found experimentally the effects of slope and rainfall intensity on stability of slope. We performed number of experimental tests using our varying slope model. To understand the failure mechanism of slopes there are various methods and also some models are been prepared for testing purpose. Slope failure can be occurred due to increase in pore water pressure, weathering of soil, cracking, decomposition of clayey rock fills, intensity of rainfall, duration of rainfall. By considering all these causes analysis of slope stability is most important to protect the slopes from failures. Slope stability analysis can be static, analytical methods to evaluate the stability of hills, natural slopes, excavated slopes etc. Analysis is generally done to understand the causes of failure or factors which affect the movement of slopes etc. Model development is also one of the ways to analyse the slope failure because of some specific reason. So understanding the rainfall effect on the slopes in hilly region is the major aspect to study. Our experimental result shows that vegetation is the effective and economical way of improving stability of slope. It increases that stability of slope by 15 to 25 %.
Experimental Study of Stack Porosity on the Performance of Thermoacoustic Refrigerator with Unparalleled Wire Mesh Stacks
Authors: Anugrah Rinasa Agistya , Widyianto Agus , Sudarja Sudarja , Ismail Muhammad Yusri
Published: October 2024

The effect of stack porosity on thermoacoustic refrigerator performance with different wire mesh stack designs is investigated experimentally in this paper. Thermoacoustic refrigeration is an innovative technique that employs the principles of thermodynamics and acoustics to achieve cooling effects without the need for hazardous refrigerants or mechanical components. Regardless of their potential, the wire mesh stacks' density and porosity are crucial characteristics that significantly impact the system's performance. The influence of three different types of wire mesh on the performance of thermoacoustic refrigerators was investigated in this study. The meshes used were #14, #16, and #18. The hydraulic radius, porosity, and clear opening differed for each variant. To determine which wire mesh structure was most effective in cooling, we tracked the changes in temperature in both the hot and cold heat exchangers. Based on the experimental results, it was observed that wire mesh #18 had a porosity of 72.6% and a hydraulic radius of 0.211 mm. This wire mesh demonstrated the most notable temperature reduction, decreasing by 4.8 °C and reaching a minimum temperature of 22.3 °C in the prototype model. The results indicate that thermoacoustic refrigerators can be improved with a larger porosity layout, leading to more noticeable temperature differences across the stack and better cooling efficiency. Findings from this study highlight the importance of optimizing parameters and designing stacks for sophisticated thermoacoustic refrigerator systems. These findings highlight the possible advantages of thermoacoustic refrigerators that use stacks of high-porosity wire mesh and give direction for future design considerations.
Optimizing Syngas Production from Municipal Solid Waste Gasification: A Dual Reactor Fluidized Bed Study with Steam and CO2 as Gasification Agents
Authors: Temaja I Wayan , Winaya I Nyoman Suprapta , Wirawan I Ketut Gede , Sucipta Made , Swamardika Ida Bagus Alit , Darma I Wayan Arya , Leite Inácio de Jesus
Published: October 2024

The escalating production of municipal solid waste (MSW) poses significant environmental and health hazards due to air, water, and soil pollution. Utilizing MSW as an energy source through gasification offers a promising solution to mitigate these impacts. This study investigates the gasification of MSW using a Dual Reactor Fluidized Bed, a thermal technology that converts solid substrates into usable gaseous fuels. The primary objective is to optimize the quality of the produced syngas by employing specific gasification agents, namely steam and CO2, and their mixtures. The research examines the effect of these agents on H2/CO ratios across a wide range of low operating temperatures, from 400°C to 700°C, using silica sand as a heat conduction medium between interconnected combustion and gasification reactors. The results demonstrate that the composition of syngas is strongly influenced by gasification temperature fluctuations. Increasing temperatures from 400°C to 700°C correlate with higher concentrations of CO and H2 in the syngas. The use of steam as a gasification agent yields H2 concentrations up to 25%, while transitioning from steam to CO2 leads to a substantial increase in CO composition, reaching 22.73%. Further analysis reveals that the H2/CO ratio decreases from 1,78 with steam and 0.64 with CO2, highlighting the crucial role of gasification agents in syngas quality. This study underscores the potential for optimizing syngas production from MSW by manipulating gasification temperatures and transitioning between different agents (steam, CO2, and their mixtures), resulting in an overall increase in the calorific value of the produced gas. These findings emphasize the opportunity to transform substantial environmental challenges associated with MSW into promising sustainable energy solutions through advanced gasification technologies.
Experimental Investigation on Performance Comparison between Flat Plate and Matrix of Tubes Solar Air Heater
Authors: Abdullah Mussa Munther , Rashid Sarmad Abdul-Razzaq , Mohammed Ali Aljubury Issam
Published: October 2024

This study is a comparative study of two solar Air Heaters (SAH) having different absorber plates: the Flat Plate Solar Air Heater (FPSAH) with a flat metal plate and the Matrix Tube Solar Air Heater (MTSAH) using novel design of longitudinal circular metal tubes. The objective is to study the possible enhancement in the thermal performance of the newly designed SAH compared to the traditional one. The results clearly confirmed the priority of MTSAH over FPSAH in different properties. Compared to the FPSAH, the MTSAH showed high thermal efficiency, output power, and outlet air temperature, with decreased in heat loss. Moreover, the temperature difference between the outlet and inlet air temperatures achieved a remarkable value of 46.5°C at an inlet air mass flow rate of 0.03 kg/s for MTSAH configuration. Furthermore, the average daily efficiency of the MTSAH stands at approximately 72.55%, 85.77%, and 92.18% for air mass flow rates of 0.03, 0.05, and 0.071 kg/s, respectively. These values represent substantial enhancements of 42.25%, 50.04%, and 52.33%, respectively, compared to the FPSAH. These findings suggest new possibilities for efficient SAH designs, impacting renewable energy and sustainable heating systems. They contribute to better energy utilization from solar thermal sources, promoting sustainability.
Application of Mixture Design for Optimization of Smoke Signal Formulation: A Comparative Study of KClO3 and KNO3 as Oxidizers
Authors: Abdul Rahman Noor Farahana , Subuki Istikamah , Salleh Zuraidah , Abdul Hamid Ahmad Hussein , Andenan Nurnadia , Minal Azmi , Ahmad Faid Mohammed Abdillah
Published: October 2024

Smoke signals are traditionally used in military contexts, but in recent times, they have gained popularity among civilians. The M18 smoke grenade was designed with a highly reactive oxidizer, KClO3, and substituting it with a safer oxidizer, notably KNO3, is one way that helps provide a safer choice for civilian use. However, providing optimal formulations for both formulations helps in deciding whether KNO3 can be substituted for the traditional KClO3 oxidizer. One of the techniques for enhancing smoke formulation is the Design of Experiments (DOE). Many researchers these days are focusing on substituting the smoke chemicals for a safer option using a trial-and-error process. However, from the standpoint of environmental contamination, numerical testing to identify the most significant output causes air pollution and chemical waste, which is not only costly but also endangers sea life if not properly disposed of. Therefore, it is crucial to optimize the smoke formulation in order to decrease waste and air pollution as well as enable future mass production of the product for both military and civilian use. The purpose of this paper is to implement the mixture design tool of the DOE approach to determine the optimal formulation of smoke signals using KClO3-based formulations, as well as to provide a comparative analysis of substituting KNO3 to optimize KClO3-based formulations in terms of time and smoke emission. From the KClO3-based formulation (28.68 wt.% KClO3, 23.47 wt.% C12H22O11, 34.39 wt.% dye, and 13.46 wt.% MgCO3) with an average time of 73.43 seconds, an acceptable formulation with a data means of 73.43, substituting with KNO3 oxidizer gave an average of 80.18 seconds, in which the smoke emission was slightly thinner compared to KClO3. As a result, KNO3 can be used as an alternative oxidizer to KClO3, and the KClO3-optimized formulation can be considered a baseline for smoke formulation for future research.
Elliptic Stable Envelopes for Certain Non-Symplectic Varieties and Dynamical $R$-Matrices for Superspin Chains from the Bethe/Gauge Correspondence
Authors:   Institut des Hautes &, Ishtiaque Nafiz ,   #201,   tudes Scientifiques, France, Moosavian Seyed Faroogh ,   McGill University, Canada, Zhou Yehao ,   University of Tokyo, Japan
Published: October 2024

We generalize Aganagic-Okounkov's theory of elliptic stable envelopes, and its physical realization in Dedushenko-Nekrasov's and Bullimore-Zhang's works, to certain varieties without holomorphic symplectic structure or polarization. These classes of varieties include, in particular, classical Higgs branches of 3d $\mathcal N=2$ quiver gauge theories. The Bethe/gauge correspondence relates such a gauge theory to an anisotropic/elliptic superspin chain, and the stable envelopes compute the $R$-matrix that solves the dynamical Yang-Baxter equation (dYBE) for this spin chain. As an illustrative example, we solve the dYBE for the elliptic $\mathfrak{sl}(1|1)$ spin chain with fundamental representations using the corresponding 3d $\mathcal N=2$ SQCD whose classical Higgs branch is the Lascoux resolution of a determinantal variety. Certain Janus partition functions of this theory on $I \times \mathbb E$ for an interval $I$ and an elliptic curve $\mathbb E$ compute the elliptic stable envelopes, and in turn the geometric elliptic $R$-matrix, of the anisotropic $\mathfrak{sl}(1|1)$ spin chain. Furthermore, we consider the 2d and 1d reductions of elliptic stable envelopes and the $R$-matrix. The reduction to 2d gives the K-theoretic stable envelopes and the trigonometric $R$-matrix, and a further reduction to 1d produces the cohomological stable envelopes and the rational $R$-matrix. The latter recovers Rimányi-Rozansky's results that appeared recently in the mathematical literature.
Quasiperiodic γ-Ray Modulations in the Blazars PKS 2155-83 and PKS 2255-282
Authors: Hashad M. A. , EL-Zant Amr A. , Abdou Y. , Badran H. M.
Published: October 2024

While there has been an increase in interest in the possibility of quasiperiodic oscillations (QPOs) in blazars, the search has hitherto been restricted to sources with well-sampled light curves. Objects with light curves that include gaps have been, to our knowledge, overlooked. Here, we study two such curves, which have the interesting feature of pertaining to relatively high-redshift blazars—FSRQs, PKS 2155-83, and PKS 2255-282—observed by the Fermi Large Area Telescope. Their redshifts border the “cosmic noon” era of galaxy formation and merging, and their light curves exhibit a distinctive pattern of repetitive high and low (gap dominant) states for 15.6 yr. To accommodate for the gaps in the curves, data are integrated over extended time intervals of 1 month and 2 months. The resulting curves were also examined using methods suitable for sparsely sampled data. This investigation of PKS 2155-83 and PKS 2255-282 suggests QPOs with periods of 4.69 ± 0.79 yr (3σ) and 6.82 ± 2.25 yr (2.8σ), respectively. The probability density functions of the blazars’ fluxes, along with the correlation between their flux and spectral index, were also analyzed. Given the epochs in which the objects are observed, the plausibility of a binary black hole scenario as an origin of the apparent periodicity was examined. We estimated the prospective parameters of such a system using a simple geometric model. The total masses were estimated and found to be consistent, in principle, with independent (dynamical) measurements of the central black hole masses in the two host galaxies.
Monitoring humoral responses against three SARS-CoV-2 vaccines in a university population from Chihuahua, Mexico
Authors: Chavarría-Bencomo Inés V , Chavez-Trillo Carlos , López-Quiñonez Monica G , Adame-Gallegos Jaime R , Zurawski Sandra , Espino-Solis Gerardo P , Zurawski Gerard
Published: October 2024

Introduction: Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19), has spread worldwide since 2019. Survey of the antibodies against SARS-CoV-2 is one of the most important measures of immunity since it can give an idea on the effectiveness of administered vaccines and the serologic status of individuals. We determined the concentrations of blood IgM and IgG against three SARS-CoV-2 proteins in vaccinated teachers and students among a university population from Chihuahua, Mexico.
Methodology: Humoral response surveillance against the 3C-like proteinase (3CLpro), nuclear protein (NP), and receptor binding domain (RBD) of SARS-CoV-2 was carried out. A total of 239 samples were analyzed: 67 from teachers who were vaccinated with CanSino and 172 from students (27.9% were vaccinated with AstraZeneca, 32.6% with Sinovac, 24.4% with Pfizer-BioNTech, 15.1% with other vaccines).
Results: Significant differences in the levels of IgG were observed between serum from individuals prior to vaccination (preimmunization serum) and from those that were vaccinated with CanSino. However, samples from asymptomatic individuals did not show differences between the preimmunization and post-immunization serum. The three vaccinated groups (AstraZeneca, Pfizer and Sinovac) did not show significant differences in anti-RBD IgG antibody titers compared to the positive control group, except for a Pfizer non-COVID-19 subgroup where the level of antibodies in the Pfizer group was 1.7 times higher. Neither vaccine group showed significant differences between those individuals who previously had COVID-19 and uninfected individuals.
Conclusions: These results provide a picture of the situation at the time when in-person classes resumed.
Antibiotic resistance in community-acquired urinary tract infections. Did the COVID-19 pandemic cause a change?
Authors: Unal Evren Emine , Evren Hakan , Galip Nilufer
Published: October 2024

Introduction: This study aimed to evaluate the antimicrobial resistance rates before and during the coronavirus disease 2019 (COVID-19) pandemic.
Methodology: 897 positive urine cultures collected from outpatients of all ages between January 1, 2017, and December 31, 2022, were analyzed. The antibiotic susceptibility tests (AST) were analyzed by using an automated VITEK 2 (Biomerieux, Marcy-l`Étoile, France) compact system. AST results were interpreted according to the European Committee on Antimicrobial Susceptibility Testing (EUCAST) criteria. The significance of resistance rates was tested with the Pearson’s Chi-squared test and risk factors of extended-spectrum beta-lactamases (ESBL) positiveness were identified with binary logistic regression.
Results: E. coli (n = 774) and K. pneumoniae (n = 123) were isolated in 86.3% and 13.7% of the patients, respectively. During this period of six years before and during pandemic, the highest resistance rate was found for cefuroxime axetil (49.8%) and the lowest for nitrofuratoin (6.0%). Statistically significant increases in resistance compared to the pre-pandemic period were only determined for cefixime (37.2 vs 46.0%) and ceftriaxone (37.6 vs 46.1%) (p = 0.010). ESBL positivity was the most important factor that statistically increased resistance for all antibiotics (p < 0.001 for all). Being male [OR (95% CI) 1.56 (1.13-2.15)] and presenting to the clinic after the pandemic period [1.4 (1.1-1.8)] were found to increase ESBL positiveness significantly.
Conclusions: Ceftriaxone and Cefixime resistance rates and ESBL positivity among the uropathogens E. coli and K. pneumoniae increased during the pandemic compared with the pre-pandemic period. ESBL positivity was higher in males.
Association of OAS1 and MxA variants with COVID-19 in Pakistani patients
Authors: Shaikh Naila , Khidri Feriha Fatima , Shaikh Hina , Mahmood Amber , Hayat Atif Sitwat , Waryah Yar Muhammad , Devrajani Tarachand , Ujjan Ikram Din , Waryah Ali Muhammad
Published: October 2024

Introduction: Coronaviruses, a family of enveloped RNA viruses, have been implicated in various clinical disorders including coronavirus disease 2019 (COVID-19). Host genetic factors, including the OAS1 and MxA gene variants may have a role in determining susceptibility to viral infections. Understanding the genetic factors involved in unraveling COVID-19`s diverse clinical outcomes is critical for disease management. This study investigated the impact of OAS1 rs2660 and MxA rs2071430 genotypes on COVID-19 susceptibility and severity among Pakistani patients.
Methodology: This was a comparative cross-sectional study. Fifty patients diagnosed with COVID-19 and 50 controls were recruited and genotyped for the selected gene variants.
Results: The OAS1 gene rs2660 exhibited an association with COVID-19 susceptibility in various genetic models. The risk decreased with AG genotype (OR = 0.23, 95% CI = 0.09-0.58; p = 0.0011) compared to GG in codominant models. In dominant (OR = 0.35, 95% CI = 0.15-0.81; p = 0.013) and overdominant (OR = 0.21, 95% CI = 0.08-0.53; p = 0.0005) models, the single nucleotide variant (SNV) decreased COVID-19 susceptibility risk. There was no association of OAS1 rs2660 genotypes with COVID-19 severity. We did not find a significant association between MxA rs2071430 variant and COVID-19 susceptibility.
Conclusions: OAS1 rs2660 AG genotype showed decreased risk of COVID-19 susceptibility among Pakistani patients. This study provides insight into the role of the OAS1 and MxA variants in COVID-19. This finding could aid researchers in understanding genetic susceptibility and severity in COVID-19 by identifying at-risk individuals and determining the optimal treatment.
A review on bioremediation by microbial immobilization-an effective alternative for wastewater treatment
Authors: Ogundolie Frank Abimbola , Babalola Olorunfemi Oyewole , Adetunji Charles Oluwaseun , Aruwa Christiana Eleojo , Manjia Jacqueline Njikam , Muftaudeen Taoheed Kolawole
Published: October 2024

In this review, we describe recent developments and strategies involved in the utilization of solid supports for the management of wastewater by means of biological treatments. The origin of wastewater determines whether it is considered natural or industrial waste, and the source(s) singly or collectively contribute to increase water pollution. Pollution is a threat to aquatic and humans; thus, before the discharge of treated waters back into the environment, wastewater is put through a number of treatment processes to ensure its safety for human use. Biological treatment or bioremediation has become increasingly popular due to its positive impact on the ecosystem, high level of productivity, and process application cost-effectiveness. Bioremediation involving the use of microbial cell immobilization has demonstrated enhanced effectiveness compared to free cells. This constitutes a significant departure from traditional bioremediation practices (entrapment, adsorption, encapsulation), in addition to its ability to engage in covalent bonding and cross-linking. Thus, we took a comparative look at the existing and emerging immobilization methods and the related challenges, focusing on the future. Furthermore, our work stands out by highlighting emerging state-of-the-art tools that are bioinspired [enzymes, reactive permeable barriers linked to electrokinetic, magnetic cross-linked enzyme aggregates (CLEAs), bio-coated films, microbiocenosis], as well as the use of nanosized biochar and engineered cells or their bioproducts targeted at enhancing the removal efficiency of metals, carbonates, organic matter, and other toxicants and pollutants. The potential integration of 'omics' technologies for enhancing and revealing new insights into bioremediation via cell immobilization is also discussed.
Alone in the dark nature: eco melancholia in Harry Martinson’s Aniara and its film adaptation
Authors: Za Giovanni
Published: October 2024

Le poème épique Aniara a été publié en 1956 par Harry Martinson. Son adaptation cinématographique en 2018 par Pella Kågerman et Hugo Lilja a contribué à la redécouverte de l’œuvre originale et a permis de nouvelles interprétations. Aniara raconte le long et pénible voyage du vaisseau spatial éponyme, qui aurait dû emporter des milliers de personnes loin de la Terre pendant « un temps calme, de repos et de quarantaine ». Un dysfonctionnement fait dévier Aniara de sa trajectoire et laisse le vaisseau spatial errer vers les limites de l’espace vide de la nature et de l’expérience humaine. Alors que le poème épique, écrit à l’époque de tension de la Guerre froide, invoquait les « radiations toxiques » comme raison de l’exil de la Terre, la version cinématographique se concentre sur les conséquences du changement climatique. Seuls et privés de direction, dans le vide d’une hostile contre nature, les humains errent sans racines. Spectrales images de l’environnement revient dans les représentations séduisantes diffusées par Mima – la machine de contrôle du vaisseau spatial, qui offre une consolation et une éphémère nostalgie d’une unité perdue. Le but de cet article est d’étudier plus en profondeur les conséquences du lien rompu entre les humains et la nature à Aniara et de proposer une lecture écocritique et posthumaniste des œuvres de Martinson et Kågerman/Lilja comme une représentation de l’humanité comme forme particulière d’exobiologie solitaire à la dérive dans la muette (techno)sphère.
Rationalisation de la consommation d’énergie : un avantage concurrentiel ?
Authors: Bakehe Novice Patrick
Published: October 2024

L’hypothèse de Porter a suscité près de trois décennies de débat sur la question de savoir si les innovations environnementales telles que la réglementation énergétique peuvent augmenter la productivité des entreprises. Cependant, un élément manquant dans ce long flux de littérature est la non prise en compte de la fréquence de contrôle de la consommation d’énergie. Nous comblons cette lacune en examinant l’impact du ciblage et de la fréquence de contrôle de la consommation d’énergie sur la performance des entreprises en Egypte. En utilisant les données d’enquête au niveau de l’entreprise, nos résultats montrent que la politique de ciblage de consommation d’énergie n’a pas d’influence sur la performance des entreprises. En revanche, la politique de contrôle régulier de la consommation d’énergie a un impact positif et significatif sur la performance des entreprises. Par conséquent, les pouvoirs publics devraient adopter une politique permettant de mieux renseigner les entreprises sur les opportunités offertes par le contrôle régulier de la consommation d’énergie afin que celui-ci soit perçu comme une opportunité et non seulement comme une charge supplémentaire.Classification JEL : Q55, L25.
Toxicology of Nanomaterials With a Special Focus on the Nervous System
Authors: Yingngam Bancha
Published: October 2024

Nanomaterials possess different properties that make them suitable for application in numerous fields. Nonetheless, their toxicity, especially their neurotoxic propensity, is a considerable area of investigation. In this chapter, nanomaterial neurotoxicity is reviewed in detail, with an emphasis on assessing toxicity, levels of exposure or routes of entry to brain cells, mechanisms by which they cause damage, and specific types of damage. In addition, in this chapter, in vitro, ex vivo, and in vivo models used to measure neurotoxicity are described. This chapter provides a discussion of this matter by considering challenges in terms of nanomaterial characterization, risk assessment, and regulatory aspects. This chapter concludes by underscoring the importance of toxicological models of prediction and safe-by-design solutions. Future research should address the long-term effects of using nanomaterials and the means of preventing their neurotoxicity.
Study of Lipid Concentration Effects on Couple Stress Blood Flow Through Stenosed Tube With Permeable Walls Considering the Effects of Slip Velocity
Authors: Ghangas Jyoti , Gill Sumeet , Kumar Rajendra
Published: October 2024

The affected arteries through any disorder get hardened due to plaque formation in cardiac issues. The proliferation of fatty substances in arteries causes stenosis. To access inaccessible areas of the human body, the delivery of nanoparticles tempts to further investigate the function of fluid dynamics in the dispersion of nanoparticles. This study hypothesizes the flow of blood containing nanoparticles via an artery having stenosis and permeable walls along with the consequences of slip velocity. For stenosed tubes, the introduction of nanoparticles has unfavorable effects. Non-linear coupled equations are resolved using the Homotopy Perturbation Method. The application of Laplace and finite Hankel transformations results in a thorough quantitative analysis of fluid acceleration. In case of mild stenosis, the coupled non-linear equations are calculated with the help of the Homotopy Perturbation Method by using appropriate corresponding boundary conditions. The flow rate and shear stress are measured at the constricted region of the tube.
Application of Nanotechnology on Medicine and Biomedical Engineering
Authors: Selvakumar P. , Seenivasan S. , Vijayakumar G. , Panneerselvam A. , Revathi A.
Published: October 2024

Numerous interdisciplinary fields, including nanomedicine, diagnostics, and nanotheranostics, have seen the extensive use of nanotechnology in biomedical engineering. This chapter will give a quick overview of nanotechnology's role as a tool that facilitates the creation of novel functional materials and medical devices here. Quantum dots, or semiconductor nanocrystals, are widely utilized in optical imaging for the diagnosis of conditions like cancer. Nanomaterials have potential applications as treatments and as preventative antiviral/antibacterial agents. In a similar vein, some nanomaterials have demonstrated the ability to circumvent the limitations of traditional antiviral medications. However, it's becoming more important to evaluate the negative impacts and toxicities of nanoparticles in medicine and treatments. The importance of nanoparticles in combating coronavirus disease is highlighted in this article's conversation of the most recent advancement in nanomaterials.
Nano Biomaterials for Neurological Theranostics
Authors: Muhammad  , Elsherbiny Shereen M.
Published: October 2024

This chapter delves into the transformative potential of nanotechnology in neurological theranostics, examining current diagnostic challenges and emerging trends in nanomedicine. It highlights the limitations of conventional methods and underscores the need for innovative solutions. From nanoscale biosensors for early disease detection to targeted drug delivery systems overcoming the blood-brain barrier, nanotechnology offers novel strategies for enhanced patient care. However, addressing validation, standardization, scalability, and safety concerns is crucial. By fostering interdisciplinary collaborations, integrating nano biomaterials holds promise for personalized neuro-theranostics, improving outcomes for individuals with neurological disorders.
The Rise of Soft Power in Modern Diplomacy
Authors: Mokdad Mohamad
Published: October 2024

Our proposed chapter, “The Rise of Soft Power in Modern Diplomacy,” therefore seeks to uncover the complex rise of soft power in the modern diplomatic era as a critical tool in worldwide diplomacy. It will analyze the conceptual evolution of soft power as distinct from the coercive strategies of hard power as a force that can persuade world opinion and decision-making via cultural appeal, political standards and conduct based on these values. The chapter traces the development of soft power from its origins in history to its recognition as a crucial technique utilized throughout the discipline and additional. It will underline historically significant cases and paradigm shifts that have increased soft powers' role in post-Cold War diplomacy dividing thus. The chapter also considers various standards on measuring the effectiveness of soft power with regard to climate change mitigation as well as cyber security precautionary measures while envisioning its future trends
Research Dynamics of Human Resources for Community Health in China
Authors: Yinpei Ma , Zhang Zhangjijun Jijun
Published: October 2024

This paper takes community health human resources as the research theme, based on the three core journals covered by China Knowledge Network as the research material, and adopts Citespace and VOSviewer analysis software to analyse the literature, aiming to reveal the laws and trends of community health human resources research and formulate sustainable development strategies. In order to make more effective use of the potential of community health human resources, it is necessary to improve the job analysis of community health human resources, achieve the coordinated allocation of community health human resources, and improve the scientific evaluation of community health human resources.
Feasibility Study of Solid-State Recycling through Direct Hot Rolling of AA5754 Aluminum Chips for Automotive Applications
Authors: El Mehtedi Mohamad , Buonadonna Pasquale , El Mohtadi Rayane , Loi Gabriela , Aymerich Francesco , Ben Khalifa Noomane , Carta Mauro
Published: October 2024

Recently, researchers have done a lot of efforts to develop new solid-state recycling processes, both experimentally and developing numerical models. This kind of process is energy-saving and environmentally friendly compared to the conventional aluminum recycling process because avoided the melting step. The purpose of this work is to evaluate the feasibility of an innovative solid-state recycling process through direct hot rolling in a non heat-treatable aluminum alloy for automotive applications. AA5754 chips have been produced by turning a bar without the usage of lubricants and compacted with a 150 kN load; the compacted billets were treated at 400 °C and directly hot rolled in several successive passes. Rolled samples are then analyzed in terms of Vickers microhardness and microstructure in both as-rolled and heat treatment conditions, this last was performed at 185°C simulating the process of paint-bake. The produced samples show an excellent bonding between chips.