bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of fiber type on performance of fiber reinforced concrete applied for hydraulic construction
Authors: Tran Vu An , Bui Le Anh Tuan , Nguyen Duc-Cuong , Nguyen Hoang Anh
Published: May 2024

This study aims at evaluating effect of fiber types on comprehensive property of a practical fiber reinforced concrete (FRC) applied for hydraulic construction. Three fiber types including polypropylene, glass, and steel fiber were used to replace concrete volume at 0.3 vol.%. Experimental results illustrated that when compared with the reference concrete, the fiber reinforced concretes with steel or glass fiber had comparable or slight changes on the fresh properties. But, addition of polypropylene fiber induced the fresh FRC with decreased slump flow and significantly increased air entrained volume. Although using various types of fibers led to unbeneficial effect on the compressive strengths of the FRCs, presence of fiber induced the FRCs with significant enhancements on the flexural strength, drying shrinkage, and water absorption and slightly increased UPV at 28 days. In this study, steel fiber was considered as the best choice for improving the mechanical properties of the hardened concrete while, as the volume stability and durability performance of the concrete were primarily considered, polypropylene seemed to be a preferable selection. According to standardized requirements, all concrete proportions were in classification of M40(28)-M45(28), being assigned to concretes suitably applied for widespread on-site hydraulic constructions.
Optimization of non-thermal plasma process to remove methyl blue towards application in wastewater treatment
Authors: Ho Quoc Phong , Truong-Hoang Nam , Lam-Phuc Thong , Nguyen Thi Bich Thuyen , Nguyen-Van Dung , Pham Huu Ha Giang , Huynh Lien Huong
Published: May 2024

This study was carried out to optimize the treatment process of methyl blue (MB) in aqueous solution using dielectric barrier discharge (DBD) plasma and experiments were designed by using response surface methodology and central composite design (RSM-CCD). Four independent factors such as plasma power, liquid flow rate, air flow rate, and exposure time were investigated. According to the analyzed results of RSM, the experimental data is best fitted with a model of the quadratic polynomial with regression coefficient values of more than 0.9 for all responses. At optimal degradation conditions, the plasma power, liquid flow rate, air flow rate, and exposure time were 100 W, 1.5 lpm, 6 lpm, and 108.8 minutes respectively and the concentration of methyl blue was reduced to 95.8% with a concentration of 1.06 ppm. The degradation of methyl blue followed kinetic reaction rate was r = 1.6 10-3[MB]2.2.
Research on the Content and Implementation Strategy of Physical Education Teaching Evaluation in Junior High School under Core Literacy
Authors: Ma Yuanyuan
Published: May 2024

The Physical Education and Health Curriculum Standard for Compulsory Education (2022 Edition) proposes to set the exercise load scientifically and cross-integrate physical education with various disciplines such as moral education, intellectual education, aesthetics and labour. Nowadays, China's education has entered the stage of connotative development, but there are still outstanding problems in teaching evaluation: influenced by the traditional concept of education, the selection function of the secondary school examination is over-expanded, the teaching evaluation is dominated by the outcome evaluation, focusing on intelligence and neglecting morality, and the only value orientation is scores and promotion, so that the students can't have a comprehensive development. The paper focuses on the core qualities of physical education, summarises the content of teaching evaluation under the core qualities of physical education, and puts forward the implementation strategy of physical education teaching evaluation. Aims to play teaching evaluation of sports teaching nurturing advantages, comprehensively promote the core literacy of junior high school students in the sports discipline high-quality development.
The Site of Kombak-te (Northern Caspian): Some New Data
Authors: Vybornov Aleksandr , Doga Natalya
Published: May 2024

Introduction. The article examines stone artifacts from a Northern Caspian Eneolithic site of the Khvalynsk culture. Stone tool industries also serve to characterize Early Metal Age cultures. Goals. The work seeks to determine the cultural affiliation of stone implements from the site of Kombak-te. To facilitate this, the paper shall analyze a variety of such stone implements and their groups. Materials and methods. The publication focuses on finds from the third major Khvalynsk site of Kombak-te. The latter was investigated in 1989 but only some pottery data were published. The article is the first to introduce into scientific circulation and analyze stone artifacts excavated on the site. The study employs the typological and radiocarbon dating methods. Results. Our preliminary typological analysis of pottery yielded a number of cultural/chronological groups, which made it possible to classify the stone artifacts in greater detail. The technical and typological features serve a basis for distinguishing between items representing the Caspian and Khvalynsk cultures. The identified differences are manifested in the involved source materials (quartzite and flint), blank manufacturing techniques, categories and types of the implements. Conclusions. The comprehensive insights attest to the stone artifacts of Kombak-te come from different cultures and eras. So, Khvalynsk-type items are paralleled by some of the Caspian culture. The paper identifies some characteristic and specific properties of source materials, primary splitting and subsequent processing techniques, describes various tools. The available radiocarbon determinations confirm those of the Caspian culture are more ancient.
Hulaguid, Chagatai and Timurid Armor Garments with In ternally Sewn and Riveted Plates, Fourteenth–Fifteenth Centuries: On Some Features of Design and Cut
Authors: Bobrov Leonid , Kushkumbayev Aibolat
Published: May 2024

Introduction. The paper considers body armor patterns with hidden plates worn by warriors of Hulaguid Iran, Chagatai Ulus, and the Timurid Empire. In contemporary weapon studies, such armor is known as ‘kuyak’ or ‘brigandine’. Goals. The study aims at identifying features of design and cut inherent to some types of Hulaguid, Chagatai and Timurid ‘kuyaks’ from the fourteenth–fifteenth centuries. Results. Comparative insights into archaeological and graphic materials yield a hypothesis there may have existed a special variety of combined ‘kuyaks’ with some plates riveted and some sewn to an organic backing on the inside. Such armor garments could have been used by warriors of Hulaguid Iran in the late thirteenth or early fourteenth centuries. From a historical perspective, such armors could be a variation between thirteenth-century armor garments with sewn-in plates and — ‘brigandines’ with riveted-in plates of the subsequent era. Our comprehensive analysis of written and graphic data also concludes that the late fourteenth and fifteenth centuries in Transoxiana, Khorasan and adjacent territories were characterized by a widespread occurrence of special plated-and-riveted armors combining an armored torso part and a long unarmored skirt. The unusual design resulted from the appearance and spread of a new mail-and-plate hip defense element referred to as ‘dyzlyq-butluq’, which made the heavy armored Central Asian skirts not that relevant. In view of the armors’ distribution area, they can be labeled as ‘Timurid-type kuyaks’. Conclusions. The replacement of ‘Timurid-type’ armors (with riveted-in plates) from combat practices of Central Asian peoples was caused by a change in the local military-cultural tradition in the aftermath of collapses of the Timurid states throughout the early sixteenth century.
Maksimovka I Grave Field (Forest-Steppe Volga Region): Results of the 2019 Excavations
Authors: Korolev Arkadii , Shalapinin Anton
Published: May 2024

Introduction. The work publishes some results of excavations at the Maksimovka I grave field. Goals. So, the article seeks to introduce materials of the 2019 excavations. To facilitate this, the paper shall describe and characterize the investigated archaeological complexes, establish their cultural and chronological attributions. Materials. Archaeological material from the occupation layer comprises Neolithic, Chalcolithic, Bronze Age, and eighteenth/twentieth century pottery, flint tools, and stone processing waste. Six burials were investigated at the site. Two burials had been destroyed and are nothing but heaps of heavily fragmented bones with no grave goods observed. In the third burial, the skeleton was lying on back in a northern-northwestern direction, accompanied by an iron knife and goat/sheep bones. The next burial consisted of four skulls and compact clusters of skeletal bones located nearby. The latter’s grave goods included flint arrowheads, a scraper, a bone spearhead, a pendant, beads, piercings and marmot incisors. The fifth burial contained a seated skeleton facing northeast and accompanied by a flint plate, an arrowhead and beads. In the last burial, the skeleton was lying on back in a northern-northwestern direction, accompanied by an ornamented clay vessel. A part of structure 1 was also examined. Results. The work shows that a total of three burials date back to the Late Chalcolithic, one — to the Late Bronze Age, and one — to the Middle Ages. The cultural and chronological attribution of the remaining burial has not been determined yet. Conclusions. The excavations at the Maksimovka I grave field have yielded materials from different cultures and periods, including Neolithic, Chalcolithic, Bronze Age, and Medieval complexes.
Optimization and Analysis of 4-Wheeler Connecting Rod for Weight Reduction and Performance Enhancement
Authors: Gangarkar Mr. Manohar
Published: May 2024

Abstract: Composite materials are now a day widely used in the engineering field. The general characteristics possessed by the composite materials are found to be the reason for using it in the automotive applications. The connecting rod is a major link inside of combustion engine. It connects the piston to the crankshaft and is responsible for transferring power from the piston to the crankshaft. It must work on high RPM because of which it has to bear severe stresses which make its design vital for internal combustion engine. In this project, design, & analysis of the 4wheeler connecting rod is done. The CATIA V5 R21 software has been used for designing the connecting rod 3D model and then the designed connecting rod model is imported into the ANSYS software in which the design is meshed and analyzed by using the Finite Element Method (FEM) and the result is manipulated. Static analysis of existing and composite connecting rod will be performed. Results of the analysis are also validated by using UTM testin
Implementation Paper on Dermatological Proriasis and other Skin Diseases Diagnosis Using Machine Learning
Authors: Raut Miss. Rutuja Dilip , Zade Dr. Amol , Gaikwad Dr. Amit
Published: May 2024

Abstract: This paper "Dermatological Psoriasis and Other Skin Diseases Diagnosis Using Machine Learning" aims to develop an efficient and accurate system for identifying psoriasis, a chronic skin condition, through the utilization of machine learning techniques. Psoriasis affects millions worldwide, presenting challenges in its diagnosis and treatment. Leveraging advanced algorithms, this project seeks to analyse various skin images and clinical data to create a robust model capable of distinguishing psoriatic lesions from other dermatological conditions with high precision. By employing machine learning algorithms such as convolutional neural networks (CNNs) and support vector machines (SVMs), alongside feature extraction methods, the system aims to automate and streamline the diagnostic process, potentially reducing both time and burdens on healthcare professionals. Ultimately, the implementation of such a tool could significantly enhance early detection rates, improve patient outcomes, and facilitate more targeted treatment strategies for individuals affected by psoriasis
Brain Tumor Segmentation Using U-Net Model
Authors: Kumar M Hemanth
Published: May 2024

Abstract: Cancer of the brain presents a significant challenge due to its lethality, necessitating precise surgical segmentation. This study explores the application of U-Net, a Convolutional Neural Network (CNN) architecture, to segment brain tumors. Specifically, the segmentation involves distinguishing necrotic, edematous, growing, and healthy tissues within the brain. Analyzing overlaps between these diverse tissue types can be intricate, making the extraction of relevant information from images challenging. The study enhances the 2D U-Net network, leveraging the BraTS datasets for training. U-Net's flexibility in setting up various encoder and decoder routes proves invaluable for extracting pertinent information from images, adaptable for diverse applications
A Study of Consumer Buying Behavior and Brand Loyalty in a FMCG Market
Authors: Mahato Pulka
Published: May 2024

Abstract: The Fast-Moving Consumer Goods (FMCG) market is a highly competitive and dynamic landscape, where understanding consumer buying behaviour and brand loyalty is crucial for business success. This research paper delves into the intricate relationship between these two crucial elements, aiming to provide valuable insights for FMCG companies to enhance their marketing strategies and foster long-term customer engagement. The study employs a mixed-methods approach, combining quantitative data analysis and qualitative insights, to explore the factors influencing consumer purchasing decisions and the drivers of brand loyalty in the FMCG sector. The research examines the impact of various elements, such as promotions, pricing, perceived quality, and brand trust, on consumer behaviour, as well as the emotional connections, repeated purchases, and advocacy that contribute to brand loyalty.
Proactive System Maintenance: Machine Learning Models for Predicting and Preventing Potential System Failures
Authors: Kumar Shivam
Published: May 2024

Abstract: In modern industrial systems, the prevention of failures and downtime is of paramount importance for ensuring efficiency and productivity. Proactive system maintenance approaches leverage machine learning (ML) models to predict potential failures before they occur, enabling pre-emptive actions to be taken [1]. In this paper, we present a comprehensive review of existing research on proactive system maintenance, focusing on the development and application of ML algorithms for fault prediction and prevention. We discuss various machine learning techniques, data sources, feature engineering methods, and evaluation metrics employed in this domain [8]. Furthermore, we propose novel algorithms and strategies for enhancing the effectiveness of proactive maintenance systems. Through experimentation and case studies, we demonstrate the feasibility and benefits of utilizing machine learning for proactive maintenance in diverse industrial settings.
Event Security Using Face Identification
Authors: Gawali Ishwari
Published: May 2024

Abstract: One of the latest trends in event planning is incorporating facial recognition technology into the registration experience. Event planners and hosts have realized how convenient and efficient this method compares to traditional registration methods. The purpose of this system is to automate the existing manual system with the help of computerized equipment’s fulfilling their requirements, so that their valuable data/information can be stored for a longer period with easy accessing and manipulation of the same. The required software and hardware are easily available and easy to work with. Event management system, can lead to secure and fast management system. It can assist the user to concentrate on their other activities rather to concentrate on the record keeping. The organization can maintain computerized records without redundant entries.
Research Paper on Social Media Application Using MERN Stack
Authors: Prakash Hari
Published: May 2024

Abstract: With rapid increase in the technology it is very essential to understand about emerging computing technology in the world. This research paper will highlight the popular MERN stack which includes four open source technologies i.e MERN ( MongoDB, Express, ReactJs, NodeJs). The demand for skilled MERN stack developers is skyrocketing. Companies across industries are recognizing the power and flexibility of this technology stack and are constantly seeking talented individuals who can bring their ideas to life using MERN. We will be discussing MERN Stack Application Social Media App
Deepfake Detection System
Authors: Rai Mr. Yogesh
Published: May 2024

Abstract: Because deep fake technology allows for the creation of incredibly realistically modified material that has the potential to mislead viewers and possibly cause instability across a range of businesses, it poses a severe threat to modern society. These days, detecting such modified content is crucial to maintaining the trustworthiness and integrity of digital media. In response, this research proposes a robust deep learning-based technique for detecting deep fakes in videos. Our method uses the Deep fake Detection Challenge dataset, which contains both real and deep fake films, to train and assess our deep learning model. We want to provide a dependable solution that can differentiate between artificially generated information and actual content using stateof-the-art neural networks. Artificial intelligence-generated phony videos are more likely to spread thanks to deep learning algorithms, which raises serious concerns about official blackmail, terrorist propaganda, revenge pornography, and political manipulation. To alleviate these concerns, our approach is designed to automatically identify several forms of deep forgery, including replacement and re-enactment techniques. By means of extensive testing and analysis, we demonstrate the effectiveness of our deep fake detection system in precisely distinguishing bogus films from authentic ones. Our system, which combines cutting-edge deep learning methods with a large dataset, offers a promising way to lessen the hazards related to the spread of deep fake technologies
Examining the relationship between Spirituality, Morality and Resilience among Young Adults
Authors: Varghese Neslin Mary
Published: May 2024

Abstract: This study investigates the relationships between spirituality, resilience, and morality among young adults, with a specific focus on examining how resilience and morality predict spirituality. Utilizing a sample of 207 young adults aged 18-25 years residing in India, the study employs a quantitative approach to analyze data collected through the 3 different scales. The analysis, conducted via multiple linear regression, reveals that both resilience and morality significantly predict spirituality, accounting for approximately 30.5% of its variance. This indicates a substantial relationship between these constructs, suggesting that individuals with higher levels of resilience and moral reasoning are likely to exhibit higher levels of spirituality. The findings challenge previous assumptions aboutthe isolated nature of spirituality, highlighting its complex interplay with other psychological constructs. The study underscores the importance of considering bothresilience and morality in discussions about spirituality, offering valuable insights into thefactors that influence spiritual beliefs and practices among young adults. This research contributes to the broader discourse on spirituality, providing a nuanced understanding of its determinants and emphasizing its interconnectedness with resilience and morality.
Analisis Pengelolaan Beduk Sedekah Subuh dalam Meningkatkan Kemanfaatan Program Filantropi
Authors: Gustiani Latifah , Wulandari Rini
Published: May 2024

Tujuan dari penelitian ini untuk mengetahui bagaimana pengelolaan untuk peningkatan kemanfaatan program serta kendala yang dihadapai DSH Klaten dalam pelaksanaan program beduk sedekah subuh. Penelitian ini menggunaka penelitian kualitatif dengan pendekatan deskriptif. Hasil dari penelitian ini menunjukkan bahwa manajemen yang digunakan DSH yaitu dengan menerapkan empat fungsi manajemen perencanaan (planning), pengorganisasian (organizing), pelaksanaan (actuating) dan pengawasan (controlling). Kendala yang dihadapi DSH dalam program beduk sedekah subuh adalah adanya rolling para karyawan dan strategi dalam mempertahankan donatur.
Dakwah Melalui Pemberdayaan Masyarakat Terhadap Kelompok Sadar Wisata
Authors: Atmawati Inggit , Triatmo Agus Wahyu
Published: May 2024

Dakwah bil haal merupakan metode yang digunakan melalui perbuatan atau aksi nyata. Salah satu kegiatan yang menggambarkan dakwah bil haal yaitu pemberdayaan masyarakat. Pemberdayaan yang dilakukan di Desa Wisata Wayang Butuh Sidowarno dapat memberikan dampak yang sangat positif bagi masyarakat melalui kegiatan-kegiatan yang dilaksanakan dan dibantu dengan sebuah kelompok, dimana kelompok tersebut disebut dengan Kelompok Sadar Wisata (Pokdarwis). Penelitian ini menggunakan jenis penelitian kualitatif dengan pengambilan sumber data primer dan sekunder. Teknik pengumpulan data pada penelitian menggunakan wawancara, observasi, dan dokumentasi. Hasil dari penelitian ini adalah pemberdayaan masyarakat dengan menggunakan empat langkah dalam pelaksanaaannya yaitu enabling, training, empowering, dan protecting. Disamping itu, dalam Desa Wisata Wayang Butuh juga sudah mampu membantu masyarakat yang kurang tercukupi dengan bersedekah dari dana yang dimilikinya. Dari pemberdayaan yang dilakukan dapat memberikan manfaat dan dampak yang baik bagi masyarakat serta menjadikam sebuah lapangan pekerjaan bagi masyarakat yang belum cukup untuk memenuhi kebutuhannya.
Restrukturisasi Media Dakwah: Dari Media Cetak Ke Media Sosial
Authors: Santoso Bobby Rachman , Nawafi Ahmad Yuzki Faridian , Kifayah Nurul
Published: May 2024

Dakwah Islam menjadi suatu kegiatan komunikasi yang sudah ada sejak manusia pertama kali diturunkan ke bumi. Perkembangan media dakwah terus berlanjut. Media yang digunakan dalam kegiatan dakwah juga menyesuaikan dengan kondisi dan kemampuan masyarakat. Media dakwah dimulai melalui ceramah langsung, melalui surat (tertulis), dan saat ini dakwah dapat dilakukan melalui media sosial tanpa harus bertatap muka langsung. Perkembangan teknologi memberikan kemudahan bagi para pendakwah (da’i) dalam menyampaikan pesan dakwah melalui berbagai media dakwah. Perkembangan teknologi tidak menggantikan media dakwah yang telah ada sebelumnya tetapi memberikan lebih banyak pilihan media dakwah yang dapat digunakan oleh para pendakwah saat ini sehingga aktivitas dakwah. Beragamnya media dakwah dapat mencapai berbagai lapisan masyarakat, mengingat masih ada kelompok yang belum mengakses teknologi. Oleh karena itu, para dai dapat memanfaatkan media tradisional dalam upaya berdakwah kepada kelompok masyarakat tersebut.
A Blockchain-Based Digital Classified Forensic Image Preservation Framework
Authors: Ali Md Morshed , Islam Md Saiful , Uddin Mohmmed Nasir , Uddin Md. Ashraf , Kushal Kashfi Shormita
Published: May 2024

In digital forensics, proper evidence management is crucial for police
investigations due to its volatility and improper handling technique.
However, to present and utilize the captured digital forensic images,
which are typically concrete and admissible in court and a trial, is
very challenging. In addition, centralized evidence-gathering,
classification, and archiving techniques diminish the credibility of
digital evidence. To address these issues, this work proposed a
blockchain-based classified digital forensic sensitive image management
framework. The framework includes a rapidly expanding polygon chain,
Interplanetary File System (IPFS), and a deep learning model that
performs with more than 98% accuracy. This framework preserves
sensitive forensic images in the fully decentralized blockchain. Our
system uses metamask wallet-based authentication to guard against
unauthorized users. We use IPFS to produce the image hash to encrypt and
save the forensic image in the blockchain. A voting method based on
smart contracts is suggested for accessing the preserved image. We
implemented the framework, which offers promising performances in
response time, evidence insertion time, evidence access time,
communication overhead, and effective forensic image categorization.
Locus of control, job insecurity and work engagement: A comparative study among healthcare workers engaged on regular and outsourced basis in an Institute of National Importance in Delhi
Authors: Mohammad Kausar , Siddharth Vijaydeep , Choudhary Abdul Hakim , Verma Arun , Mehmood Khalid , Raj Charan , Sharma D. K.
Published: May 2024

Positively engaged employees make organisations succeed by investing
more time, taking additional responsibilities, helping others and have
higher work satisfaction, performance and stay with the organisations.
With policy shift towards outsourcing, there are unexplored impact on
work engagement. An analytical correlational study was conducted at the
apex quaternary care healthcare institute to find any difference in work
engagement among the regular and outsourced employees and association
with locus of control, a construct about control over one’s significant
matters. The study revealed that work engagement was higher among
outsourced employees and increased with internalisation, age, experience
and lower job insecurity. It is not affected by gender or level of
education. Locus of control does not vary with age, experience, gender
or level of education. The job insecurity decreases with age, experience
and internalisation. It is not affected by education and is higher among
female employees.
Understanding Full-Depth Steric Sea Level Change in the Southwest Pacific Basin using Deep Argo
Authors: Lele Ratnaksha , Purkey Sarah G.
Published: May 2024

Using nine years of full-depth profiles from 55 Deep Argo floats in the
Southwest Pacific Basin collected between 2014 and 2023, we find
consistent warm anomalies compared to a long-term climatology below 2000
m ranging between 11±2 to
34±2moC, most pronounced between 3500
and 5000 m. Over this period, a cooling trend is found between 2000-4000
m and a significant warming trend below 4000 m with a maximum rate of
4.1±0.31 moC yr-1 near
5000 m, with a possible acceleration over the second half of the period.
The integrated Steric Sea Level expansion below 2000 m was
7.9± 1 mm compared to the climatology with a trend of
1.3± 1.6 mm dec-1 over the Deep Argo
era, contributing significantly to the local sea level budget. We assess
the ability to close a full Sea Level Budget, further demonstrating the
value of a full-depth Argo array.
Conflicting perceptions of the well-organised environment
Authors: Suhanova Dina
Published: May 2024

The paper presents a cross-disciplinary investigation into the intricate state of human-environment interaction. Drawing from the field of environmental psychology, it is an inquiry of the attitudes and perceptions of the human’s surrounding private and public environment, and presumably conflicting understanding, perception and individual interpretation of what well-organised and orderly environment means. It is very common to see the concept of a well-ordered environment in widespread public discourse. Depending on the context, a term encompasses various factors, such as physical, social, educational, and mental domains and can be applied not only to spatial environments but also to business and entrepreneurial, school and workplace environments, and more. Beyond creating an up-to-date understanding of the concept and understanding of orderly environment in the Latvian context, the paper aims to clarify whether there are limitations posed by conflicting understandings of the notion and set objectives, organisation of the environment, quality of life and personal and community growth. The research approach is based on the investigation through society involvement. The online questionnaire was employed to gather original and qualitative data to analyse the set topic. Additionally, the study of relevant scientific publications, bibliography and visual observations was used.
The obtained results shows that conflicting opinions and perceptions exist, and they pose challenges to spatial development and quality of life. The paper contributes to the current understanding of the collectively formed environment among Latvia’s population. It can be applied to explain limitations and social colissions in spatial developments, as well as during discussions of environmental maintenance, architecture and urban quality, and overall condition of surroundings among various stakeholders.
Enhancing solar still distillation efficiency through integrated solar chimneys and submerged condenser systems
Authors: Varadhan Balan , Subasini Chellathurai Amiirthabai , Palani Gopinath , Selvaraju Mayakannan
Published: May 2024

A solar chimney has been studied in this research to increase the efficacy of still convection currents. The usage of a condenser also improved the condensation process. Solar still condensers are typically made up of tubes through which salt water is pumped. But in the set-up shown, water vapour was channeled through a series of pipes submerged in the ocean. Solar still is built and tested in real-world situations with solar as a standard. Evaporator (basin) area-based efficiency comparisons reveal that the still-equipped solar chimneys and condensers yielded 9.1% superior results. The mainstream of the yielded (61%) condensed in the solar still condensers, resulting in a production rate of 5.3 L per m2 day for the simple solar still and 6.2 L per m2 per day for the modified still. This demonstrates that the evaporation efficiency of solar still and, by extension, its distillation efficiency improved by increasing convection and condensation.
A computational analysis of operational parameters influencing coal gasification in a lab-scale drop tube gasifier
Authors: Kumar Sunel , Wang Zhihua , Wang Shuang , Dwamena-Akenteng Yaw , Jiang Ding , Chen Hao
Published: May 2024

This study uses a numerical simulation for coal gasification operation in a drop tube gasifier to investigate the effects of wall temperature and oxygen-to-coal ratios on gasification. Coal gasification is an efficient approach to electricity generation, offering a cleaner alternative to conventional coal combustion methods. A 2-D CFD model of the gasifier was employed to perform grid sensitivity analysis and subsequently compute the influences of varying wall temperatures (1000 K, 1250 K, and 1500 K) and oxygen-to-coal ratios (0.6, 0.8, 1, and 1.2) on the temperature profile, syngas composition, and velocity within the gasifier. Temperature profiling within the furnace defined a spectrum of maximum and minimum temperatures, with apex values recorded at 2100 K and lowest values at 1300 K for Cases 12 and 1, respectively. High oxygen-to-coal ratios favored the production of CO2 due to enhanced combustion reactions, whereas lower oxygen-to-coal ratios were conducive to higher yields of CO and H2, essential syngas components. Velocity profiles of particles within the gasifier increased with higher temperatures and oxygen-to-coal ratios, and the maximum velocity was 9 m per second. In conclusion, this study offers valuable insights into optimizing operational parameters such as wall temperatures and oxygen-to-coal ratios to enhance the performance and efficiency of coal gasification processes in lab-scale gasifiers.
Heat transfer in inhomogeneous dispersed systems based on graphene oxide hydrogels
Authors: Pokusaev Boris , Moshin Andrey , Nekrasov Dmitry , Khramtsov Dmitry , Zakharov Nicolay , Khairov Raphael
Published: May 2024

Based on the optical holography method, studies of the occurrence and development of convective flows in hydrogels of various concentrations with the addition of graphene oxide in relation to 3-D-bioprinting technology have been performed. For quantitative measurement of temperature fields, the optical holography method was used in combination with the gradient thermometry method, based on the dependence of the refractive index on the properties of hydrogel systems modified with graphene oxide with different concentrations and temperatures. Under conditions of changes in the thermophysical properties of hydrogels, as well as the magnitude of the supplied heat flux, the features of heating the wall area are studied in order to determine the coefficients of thermal conductivity and heat capacity, as well as the nature of the formation of convective flows near the wall heated from below.
Numerical simulation for optimising of inlet and outlet positions for mechanical ventilation and heat dissipation: A case study to improve ventilation in an indoor 110kV substation
Authors: Zhang Haomai , Wang Ling , Yang Peng , Liu Yingwen , Zhu Chao , Wang Lv , Zhong Hua
Published: May 2024

Efficient ventilation and heat dissipation in indoor substations are crucial for the stable operation of transformers. This study investigates the impact of inlet and outlet positions on ventilation and heat dissipation performance in a 110 kV indoor substation using CFD. A model of the 110 kV main transformer chamber is developed. Twelve combinations of inlet and outlet positions are analysed. Inlet positions include side walls parallel to radiators, side walls perpendicular to radi?ators and both side walls perpendicular to radiators. Outlet positions include the top of the chamber, the side of the inlet, adjacent to the inlet, and opposite inlet. Results demonstrate that locating outlets at the top of the chamber reduces transformer temperature by 0.5-1.6? and increases energy utilization by 8.6%-24.8% regardless of inlet position. Two opposite inlets perpendicular to radiators allows even air distribution between radiators. This configuration reduces transformer temperature by 3.4?C when the outlet is located at the top of the chamber. Overall, the optimal ventilation design involves top chamber outlets and inlets on opposite walls perpendicular to radiators.
Hodgkin transformation of chronic lymphocytic leukemia/small lymphocytic lymphoma
Authors: Vucic Miodrag , Lilic Bozidar , Stojnev Slavica , Krstic Miljan
Published: May 2024

Introduction. In rare cases, chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma may transform into Hodgkin lymphoma, with about a hundred cases reported in the literature so far. We present a case of the Hodgkin variant of Richter transformation. Case report. After a one-year watch and wait period, a 60-year-old male with CLL developed B symptoms, generalized lymphadenopathy, and splenomegaly. Upon initial staging (Binet B/Rai 3), he was started on fludarabine, cyclophosphamide, and rituximab (FCR) regimen. After the third cycle of treatment, the right-sided axillary lymphadenopathy persisted and became painful, while the dimensions of the remaining organs affected by the disease decreased. Upon the finalization of the final sixth FCR cycle, the painful right-sided axillary lymphadenopathy persisted (though partially decreasing in size), with the development of local redness and swelling. A biopsy of the residual axillary node was performed, which revealed disease transformation into Hodgkin lymphoma. Upon multislice computed tomography-based staging ( IVE clinical stage) and prognostic assessment (unfavorable prognosis), it was decided that the treatment be continued with doxorubicin, vinblastine, dacarbazine (AVD) regimen. The presented patient died two months after the diagnosis of Hodgkin transformation (HT) was established during the initial cycle of AVD. Conclusion. Although CLL is an indolent malignancy, in rare cases of HT, the prognosis is largely dismal. The available treatment strategies demonstrate suboptimal results, although novel immunotherapies may change the landscape of HT therapy in the near future.
Novel path planning algorithm for laser powder bed fusion to improve the scan quality of triply periodic minimal surface structures
Authors: Tang Huiliang , Zhang Jiangzhao , Wang Chu , Long Yu
Published: May 2024

Traditional path planning methods, such as contour and raster methods, suffer from problems like uneven filling, overfilling, and underfilling in the sliced layers, resulting in poor continuity of the lattice melt pool, internal porosity defects, and severe powder adhesion at the contour edges, while research on path planning for three-periodic minimal surfaces lattices is relatively limited. In this study, a scanning path planning method based on lattice equations control is proposed, which differs from traditional contour paths and raster paths. The new paths are controlled by the isosurface parameters of the lattice equation and optimized using the traveling salesman problem, resulting in more uniform scanning paths. The new paths avoid the underfilling issue present in raster path and the sawtooth-shaped borders of raster path. Additionally, they circumvent the nonuniform scanning path problem caused by uneven wall thickness in contour path. Through visualizing the paths and conducting printing experiments on the lattice, it is found that the new path is more uniform compared to contour paths, effectively addressing the issue of overfilling. Compared to raster paths, the new path has smoother boundaries and reduces internal porosity and powder adhesion within the lattice. This research has important value in reducing internal porosity and external powder adhesion issues in three-period minimal surface (TPMS) lattice printing processes, further enhancing the manufacturing quality of TPMS lattices.
Clima organizacional em uma organização hospitalar
Authors: Rodrigues Júnior Alcides Alves , Ribeiro Rhubens Ewald Moura
Published: May 2024

O presente artigo possui o objetivo de avaliar o clima organizacional de um hospital e quais os fatores que impulsionam esses resultados através de uma pesquisa quantitativa aplicada com os colaboradores da instituição, diante disso, foram aplicados dois questionários, com o intuito de descrever o perfil dos colaboradores e como se sentem a respeito das situações propostas nos questionamentos. Por meio dos resultados, chegou-se à conclusão de que a instituição possui um clima organizacional positivo, o que proporciona bons resultados a empresa, no entanto, foram destacados pontos, em relação a variável cargos, carreiras e salários e a qualidade de vida no trabalho que podem ser melhorados, com o intuito de fortalecer a satisfação dos colaboradores.
Marca empregadora e equidade de gênero: uma relação necessária
Authors: Freitas Isadora Ronchi Gonçalves de , Silveira Ricardo de Oliveira , Ramos Simone Cristina , Reis Germano Glufke
Published: May 2024

As mudanças associados a pandemia de COVID-19 aprofundaram diferenças nas relações de gênero (Estrela, 2020), tornando ainda mais necessário refletir sobre o tema. Neste artigo busca-se compreender a percepção de profissionais de RH sobre a relação entre marca empregadora e equidade de gênero. Foi realizada uma pesquisa qualitativa básica. Os resultados apontam que a marca empregadora pode se relacionar com a promoção da equidade de gênero, a partir de atributos que auxiliem ou facilitem a gestão dos papéis femininos, como a flexibilidade de horários e criação de oportunidades de carreira. Frente aos achados, são desenvolvidas recomendações práticas e de pesquisa.
Qualidade de Vida no Trabalho segundo as percepções dos funcionários públicos de uma Unidade Básica de Saúde (UBS)
Authors: Lima Lucas Alves de Oliveira , Silva Laura Lima , Domingues Júnior Paulo Lourenço
Published: May 2024

A presente pesquisa teve como objetivo analisar as principais percepções que os profissionais da saúde de uma unidade básica de saúde (UBS) do município de Três Rios/RJ possuem acerca da temática Qualidade de Vida no Trabalho (QVT). Para tanto, adotou-se uma pesquisa exploratória de abordagem qualitativa, a qual foi realizada mediante a aplicação de uma entrevista semi-estruturada com uma amostra composta por quinze funcionários. Após a análise do discurso, constatou-se que as principais percepções sobre o que é ter qualidade de vida no trabalho estão associadas à satisfação no trabalho, envolvendo assim elementos como bem-estar e prazer. Na rotina laboral dos servidores, prevalecem fatores benéficos como o bom relacionamento interpessoal, entretanto, há a prevalência de aspectos nocivos como a infraestrutura inadequada e a falta de materiais.
Padrões de carreira na contemporaneidade: articulando a literatura internacional com a narrativa de trabalhadoras/es brasileiras/os
Authors: Ribeiro Marcelo Afonso
Published: May 2024

Padrão de carreira é recurso metodológico interessante para produzir retratos das construções de carreira. Com objetivos articulados, visamos sintetizar os principais padrões de carreira descritos na literatura internacional e construir qualitativamente padrões narrativos de construção de carreira de 46 trabalhadoras/es brasileiras/os, apontando semelhanças e diferenças das taxonomias propostas. A literatura descreveu cinco padrões de carreira (tradicional/profissional, flexível, híbrido, equilíbrio entre papéis e transicional). E a pesquisa configurou nove padrões narrativos de construção de carreira (organizacional, profissional, ocupacional, flexível, empreendedora, informal, transicional, liminar e híbrida). Diversificar amostras e contextos de pesquisa é central para contextualização teórico-conceitual e produção de práticas situadas.
Anthropological Study of Indigenous Weapon Production Among the Anufor of Northern Ghana
Authors: Abokyi Samuel Nana , Jebuni Tigwe Salifu , Mahama Edward Salifu
Published: May 2024

Weapon production and warfare are unavoidably linked, as the former is needed to prosecute the latter. It was essential for the protection of the ego and image of a group, and this urge was strong enough to plunge states into endless warfare. During pre-colonial times, West African states like the Dagomba, Gonja, Mamprusi, and allies, including the Anufor, were preoccupied with wars of expansion and consolidation of acquired territories. In most cases, these wars involved the seizure of territories, as the ownership of territories showed the extent of one’s power and influence. Several traditional armies were thus engaged in warfare to control territories and the resources therein, including trade routes and markets. The strength of an army partly depended largely on the efficacy and level of sophistication of their weapons. The Anufor, who were very efficient in the war enterprise as mercenaries, were equally efficient in producing various weapons, including physical handheld weapons, plant venom, and spirituality. This paper uses oral histories and traditions among the Anufor and their allies in Ghana and Togo, as well as archival sources. Critical analysis of relics of war accouterments and Arabic manuscripts at the Institute of African Studies, Legon, was enriching.
Development of web-based media in instrument analysis college to improve student competence
Authors: Sugiharti Gulmah , Nasution Haqqi Annazili , Nasution Mutiara Agustina , Siregar Muhammad Isa
Published: May 2024

This research aims to develop and obtain Web-based learning media that meets the eligibility requirements according to BSNP criteria, determine the increase in student competency by using the developed Web-based media and determine the percentage of student responses to Web-based media used in lectures on the topic of instrument analysis. This research method is a research and development method using the ADDIE model. Web-based media was validated by media experts and material experts, then the valid media was presented to 26 Chemistry Education students at Medan State University to see the influence of the Webb media developed and get responses on the web-based media used. The research results show that the Web-based learning media developed meets the BSNP eligibility criteria with an average percentage of 91.25%. The use of Web-based media can increase student competency in lectures on the topic of Instrument Analysis, namely 75% for experimental classes that use Web media and 56% for classes without Web media. Learning outcomes using Webb media are better than without using Webb media and student responses to the use of Webb-based media in lectures Topic evaluation Instrument analysis is very high. Thus, over all the Web-based media developed is good for use in lectures on the topic of Instrument Analysis, to provide students with learning experiences in using the Web.
Oryginalne i ekscentryczne produkty ubezpieczeniowe spotykane na rynku
Authors: Kopaniewska Izabela , Król Karolina , Kuśmierczyk Karolina , Kozdra Kamila , Drabik Klaudia , Ręba Sonia
Published: May 2024

W artykule omówiono podstawowe pojęcia dotyczące ubezpieczeń oraz wskazano na fakt, że ubezpieczenia to zabezpieczenie majątku przed nieprzewidzianymi zdarzeniami losowymi. W poszczególnych częściach artykułu przedstawiono mnogość zagrożeń, od naturalnych żywiołów po złe praktyki biznesowe. W konsekwencji szerokich potrzeb klientów, zakłady ubezpieczeniowe tworzą specjalnie dla swoich klientów nietypowe produkty. Celem artykułu jest przedstawienie nietypowych produktów, wiążących się z bardzo wysokim ryzykiem, ponieważ są one niestandardowe oraz mogą się okazać kosztowne dla obu stron kontraktu. Kierowane są one do ludzi, którzy szukają dodatkowej ochrony w nietypowym sytuacjach.
New Goniasteridae and in situ observations significant to deep-sea coral predation
Authors: Mah Christopher L.
Published: May 2024

Eight new species, including one new genus, Armaster chondros n. gen. sp., Atheraster luma n. sp., Atheraster phaeos n. sp., Atheraster umbo n. sp., Circeaster dux n. sp., Evoplosoma besseyae n. sp., Evoplosoma mystrion n. sp. and Evoplosoma pharos n. sp. are newly described from Australian waters. Atheraster, Circeaster and Evoplosoma have been reported previously as predators on deep-sea octocorals. Evoplosoma, Gilbertaster and Hippasteria are members of the Hippasterinae, which have also been reported as predators on deep-sea corals and other cnidarians, suggesting that this interaction occurs in Australian deep-sea settings. Atheraster, Circeaster and Armaster are referred to a new subfamily, the Circeasterinae. Ecological and systematic implications for the Goniasteridae are discussed. An in situ observation of a myxasterid predating upon an octocoral is also reported.
Determinant of Stock Investment Intention on Young Generation in Indonesia
Authors: Hakim Lukman , Navilla Meda Shava , Haque Farhat
Published: May 2024

The young generation is a generation that has a major contribution to development in Indonesia. Malang City was chosen as the object of this research because the level of financial literacy and inclusion in Malang City has high rates. This study aims to determine whether financial literacy and inclusion affect the investment intention of young generation stocks in Malang City. This study used primary data with descriptive quantitative methods and analyzed using multiple linear regression analysis. The results of this study indicate that financial literacy and inclusion have a positive and significant effect on stock investment intentions of the young generation in Malang City. This research is expected to contribute to improving investment policy, especially stock investment in Malang City. So that stock investment in Malang City can have a positive influence on increasing the income of the people of Malang City in a sustainable manner.
CERN – największe laboratorium na Ziemi
Authors: Lesiak Tadeusz
Published: May 2024

Polska w Europejskiej Organizacji Badań Jądrowych – niezwykła historia współpracy, sukcesów i przyszłych perspektyw CERN.
W krainie kubitów
Authors: Ekert Artur
Published: May 2024

Komputery kwantowe mogą rozwiązywać zadania, w których klasyczne komputery się nie sprawdzą. To zasługa mechaniki kwantowej – mówi prof. Artur Ekert z Mathematical Institute Uniwersytetu Oksfordzkiego oraz Narodowego Uniwersytetu Singapuru.
Budowniczowie megalitów z Libanu
Authors: Wygnańska Zuzanna , Steimer-Herbet Tara
Published: May 2024

Odkrycia polskich archeologów na Bliskim Wschodzie przybliżają kulturę pierwszych budowniczych sprzed 5 tys. lat.