bluuebunny/crossref_metadata_2025 huggingface dataset:
ADSORPSI URANIUM TERLARUT OLEH KOMPOSIT AMMONIUM DIHYDROGEN PHOSPHATE/ZEOLIT
Authors: Purwanto Yuli , Ibnu Saputra Dwi Luhur , Mirawaty Mirawaty , Sugiharto Untung , Wati Wati , Rachmadetin Jaka , Artiani Pungky Ayu
Published: December 2023

Zeolit merupakan salah satu mineral aluminosilikat yang banyak dipelajari sebagai material penjerap untuk pengelolaan limbah cair. Mineral ini juga banyak dipelajari untuk pengelolaan limbah cair dari industri nuklir, termasuk di antaranya sebagai penjerap uranium dari limbah cair. Pengelolaan limbah cair yang mengandung uranium ini diperlukan pada setiap tahapan daur bahan bakar nuklir. Modifikasi zeolit, yang dapat dilakukan secara fisika atau kimia, telah dilaporkan dapat meningkatkan kemampuan adsorpsinya. Dalam penelitian ini dilakukan peningkatan kemampuan zeolit dengan menambahkan ammonium dihydrogen phosphate (ADP) sehingga terbentuk komposit ADP/zeolit untuk adsorpsi uranium. Tujuan penelitian ini adalah untuk mempelajari kemampuan komposit ADP/zeolit sebagai penjerap uranium dari limbah cair. Zeolit alam dari Lampung digunakan sebagai material awal. Material komposit dipreparasi dengan mencampurkan ADP dan zeolit dalam labu didih. Komposit ADP/zeolit yang diperoleh dikarakterisasi dengan XRD dan selanjutnya digunakan untuk percobaan adsorpsi uranium yang dilakukan dengan metode batch. Hasil penelitian menunjukkan mineral utama pada zeolit yang digunakan adalah klinoptilolit. Keberhasilan preparasi komposit ADP/zeolit dibuktikan melalui pola difraksi XRD. Hasil eksperimen ditunjukkan dengan kinetika adsorpsi uranium oleh komposit ADP/zeolit yang berlangsung cepat dan mencapai kesetimbangan kurang dari 16 menit. Model kinetika adsorpsi uranium oleh komposit ADP/zeolit model pseudo-orde kedua. Variabel pH menunjukkan adsorpsi uranium nitrat oleh komposit ADP/zeolit optimum pada pH 7. Komposit ADP/zeolit menunjukkan peningkatan kemampuan adsorpsi terhadap uranium dibandingkan dengan zeolit alam. Komposisi penyusun komposit ADP/zeolit didapatkan pada perbandingan ADP : zeolit masing-masing adalah 1:1.Kata kunci: Komposit, zeolit, ammonium dihydrogen phosphate, uranium terlarut, adsorpsi.
Электромагнитные процессы в универсальном полупроводниковом преобразователе для транспортных бортовых систем хранения электрической энергии
Authors: Лобов Борис Николаевич , Теличенко Станислав Алексеевич , Никитин Виктор Валерьевич , Колпахчьян Павел Григорьевич , Евстафьев Андрей Михайлович
Published: December 2023

Применение бортовых накопителей энергии в составе тяговых электрических передач подвижного состава позволяет существенно повысить энергетическую эффективность транспортных средств. Важным элементом транспортной энергосистемы, совмещающим работу систем хранения энергии и потребителей, обеспечивающих тяговые и вспомогательные нужды, являются полупроводниковые преобразователи. Проанализированы электромагнитные процессы и выведены основные расчетные соотношения универсального двунаправленного полупроводникового DC-DC преобразователя, предназначенного для применения в составе гибридных тяговых энергетических установок подвижного состава. При анализе электромагнитных процессов в двунаправленном преобразователе использованы методы теории электрических цепей. Выполнен анализ электромагнитных процессов в универсальном двунаправленном преобразователе, работающем в повышающем, понижающем и повышающе-понижающем режимах. Получены расчетные соотношения, позволяющие определить параметры всех основных элементов силовой схемы преобразователя.
Влияние быстродействия цифрового регулятора на характеристики силокомпенсирующей системы
Authors: Богданов Дмитрий Юрьевич , Драченко Андрей Сергеевич , Пальчиков Владимир Иванович , Кравченко Олег Александрович
Published: December 2023

На работу цифровой системы управления большое влияние оказывают период дискретизации и время задержки. Известные методы оценки влияния этих параметров на силокомпенсирующие системы требуют осуществления сложных аналитических вычислений или полноценного моделирования системы. Целью настоящего исследования является оценка влияния периода дискретизации и времени задержки в зависимости от требуемых характеристик силокомпенсирующей системы. Исследование осуществлено с помощью компьютерного моделирования систем вертикального и горизонтального перемещения. Результаты исследования позволили разработать новый метод оценки допустимых значений периода дискретизации и времени задержки по значению постоянных времени корректирующего устройства. Предложенный метод, в отличие от аналогов, не требует сложных вычислений и может быть применён при проектировании силокомпенсирующих систем.
Utilização de pavimento permeável como alternativa compensatória para drenagem urbana em Recife-PE
Authors: Menezes Lucas Amorim Amaral , Cabral Jaime Joaquim da Silva Pereira
Published: December 2023

O acelerado processo de urbanização nas últimas décadas altera a organização populacional mundial e acarreta modificações nas cidades, afetando diretamente o meio ambiente. O surgimento de soluções alternativas, como os pavimentos permeáveis, possuem conceitos sustentáveis e remodelam o sistema de drenagem para adaptação aos hidrogramas de cheias mais rápidos e mais críticos, com o objetivo de reduzir os impactos da urbanização. Este estudo objetivou analisar a viabilidade da utilização de um pavimento permeável, executado na Escola Politécnica da Universidade de Pernambuco (POLI-UPE), como uma alternativa compensatória em drenagem urbana, avaliando o sistema e o seu comportamento hidráulico. A metodologia seguiu as etapas de caracterização do subleito; caracterização e análise de conformidade normativa dos materiais das camadas do pavimento; e avaliação do desempenho hidráulico da pavimentação permeável, com a realização dos ensaios de permeabilidade, simulações hidráulicas de precipitação e avaliação do maior evento chuvoso, no período analisado de Março a Maio de 2023. Os resultados indicaram um solo de subleito de boa qualidade e material da camada de base em conformidade normativa. Em contrapartida, o material utilizado no assentamento e a resistência à compressão dos blocos do revestimento foram desconformes, mas sem influência negativa na utilização para o período. O desempenho hidráulico do pavimento foi analisado, apresentando alto coeficiente de permeabilidade recém construído (3,26 x 10-3 m/s) e bom comportamento nas simulações de chuvas intensas e no evento chuvoso natural. O pavimento permeável permitiu a infiltração e, consequentemente, redução dos volumes totais escoados, caracterizando-se como potencial mitigador dos alagamentos urbanos.
Continuous Learning at the Individual Level: a study in software development organizations
Authors: Rodrigues da Fonseca Letícia , Ribeiro Silva Marcelo , William Silva Sheldon , Marques Pereira Guilherme
Published: December 2023

This study aims to understand the occurrence of continuous learning at the individual level in Software Development Organizations – SDOs according to the framework proposed by Tannenbaum (1997). The objectives are to understand and describe the strategies and tools applied by developers during their learning process and if the studied SDOs offer a work environment conducive to continuous learning at the individual level. Thus, qualitative research was conducted with 12 Software Development Professionals in four SDOs applying semi-structured interviews. The subjects interviewed were involved in the software development process. The analyses were performed by the qualitative data analysis software Weft_QDA, which allowed the identification and analysis of speeches related to the theoretical concept of this study. The results show that SDOs offer an environment conducive to continuous learning at the individual level by allowing meaningful learning experiences, motivating constant participation in these experiences and, especially, engaging in complex projects whose results are influenced by the application of acquired knowledge.
For other ways of life: cosmopolitics in regulations, utopias and spiritualities
Authors: Cunha Pedro Henrique Azalim , Monte-Mór Roberto Luís de Melo
Published: December 2023

This article critically approaches our anthropocentric relationship with the planet and raises alternatives to think about cosmopolitical regulations and utopias as potentialities for the reestablishment of the planet's equilibrium. To do so, it is necessary to understand the Earth as a living organism, Gaia, as in fact various peoples and cultures already recognize it. We try to imagine how other worlds, other ways of living and relating to other beings and natural elements would be possible. We thus aim to think about, question, and eventually regulate the rights of nature and its relations with health and spirituality in the appropriation and production of social space, of living spaces. In spite of the advances observed in Latin America in the regulation of society/nature relations, Brazil is still characterized by an anthropocentric legislation that references human domination over other beings and elements. The apparent advances in the line of ecological modernization, or 'green stamps', in fact do not address the issues and causes that determine or contribute to the destruction of the planet, or even to the threats posed today to all organisms, including Gaia herself. Cosmopolitical regulations and utopias can be empowered to achieve other ways of life, changing the hegemonic anthropocentric perspective to an ecocentric approach, and perhaps even changing the dominant materialist paradigm to a new paradigm that recognizes the spiritual-materialist dialectical relationship and the necessary sacralization of everyday life.
Current Trends in the Development of Neuroscientific Research in Education
Authors: Храмова Марина , Храмов Александр , Федоров Александр
Published: December 2023

Modern neuroscience is making significant progress in the study of brain functions, which can be of great importance for the education. However, there is a gap between current neuroscientific evidence on how the brain learns and its direct application in classrooms. What can neuroscientists, psychologists, and educators do to improve the interaction between neuroscience and education? In this article, we attempt to answer this question by examining the essentials of educational neuroscience as an interdisciplinary field of research at the intersection of neuroscience, pedagogy, and cognitive science, which seeks to translate research on the neural mechanisms of learning into educational practice and understand the impact of education on the learner's brain. In the first part of the article we describe the origins and current progress of neuroscience in education, discuss terminological uncertainty in the Russian scientific literature on the relationship between neuroscience and education, as well as possible and, in our opinion, most promising ways of interaction between psychology, pedagogy and neuroscience. In the second part of the article we analyze the main directions of contemporary research in the field of neuroscience, based on the Scopus database of scientific information.
Assessment of properties of rubble masonry used in heritage structure
Authors:   Department of Structural Engineering, Veermata Jijabai Technological Institute, Bambole Abhay , Gaikwad Rohan ,   Department of Structural Engineering, Veermata Jijabai Technological Institute, Dongre Archanaa ,   Department of Structural Engineering, Veermata Jijabai Technological Institute, Reddy G R ,   Department of Structural Engineering, Veermata Jijabai Technological Institute
Published: December 2023

Preservation of Heritage structures is of utmost importance. Rubble masonry played a significant role in the conservation of structures. It is a traditional wall construction material used to build walls and standing structures in India since ancient times. Even now, heritage structures are being made to serve humanity for many years. Therefore, it is necessary to find a combination of rubble masonry and essential additives like lime mortar and surkhi to help build new heritage structures and also help reduce the deterioration of ancient architectural structures and monuments. This experimental study presents rubble masonry for repairing Heritage structures as an alternative to the conventional use of cement mortar. In addition to repairing work, rubble masonry, lime mortar, and surkhi are used to build new heritage structures for long-term sustainability. Rubble masonry, lime mortar, and surkhi can reduce the deterioration of old architectural structures and monuments. A case study on Global Vipassana Pagoda allocated in Mumbai, India, is considered. It is made up of Basalt stone with an interlocking system.
Improvements of mechanical and physical features of cement mortar by nano Al2O3and CaCO3 as additives
Authors:   Civil Eng. Dept., College of Engineering, University of Babylon, Humad Abeer M. , Dakhil Ali J. ,   Dept. of Roads and Transport Eng., College of Eng., University of Al-Qadisiyah, Al-Mashhadi Samer A. ,   Civil Eng. Dept., College of Engineering, University of Babylon, Al-Khafaji Zainab ,   Dept. of Civil Eng., Faculty of Eng. and Built Environment, Universiti Kebangsaan Malaysia, Mohammed Zainab Adel ,   Babel Tower for Studies and Scientific Research com, Jabr Sarah Fadel ,   College of Materials Engineering, University of Babylon
Published: December 2023

The impact of Nanoparticles of (〖AL〗_2 O_3and 〖CaCO〗_3) particles on the features of cement mortar was explored in current research with a mean diameter of ~50nm, and 100nm in three various amounts of 1, 3, and 5% substitution by cement’s weight as binary blending materials with fixed water/cement proportion 0.46. Cement mortar's mechanical and physical features (compressive strength, density) were tested after 7 and 28 days. The findings illustrated that utilizing nanoparticles of 〖AL〗_2 O_3 improved the mortar compressive strength at early ages at 7 curing days better than 28 curing days, and 3% of substitution was the optimal proportion. Also, utilizing nano-〖CaCO〗_3 as a binary blending mixture with substitution proportion (1, 3, 5%) by cement's weight improved mortar compressive strength at early ages at 7 curing days better than 28 curing days. However, there were no apparent effects when nanoparticles of (〖AL〗_2 O_3 and 〖CaCO〗_3) were replaced on the density and ultrasonic pulse velocity of cement mortar at 7 and 28 days. The interaction impact of substitution 1 and 3 percent of nanoparticles of (〖AL〗_2 O_3 and 〖CaCO〗_3) particles to cement mortar increased the CS by (28 and 74%) at 7 curing days and (30 and 42%) at 28 curing days, respectively.
Valorized rice husk as green corrosion inhibitor for Al 6061 in 1M HCl
Authors:   Department of Mechanical Engineering, Landmark University, Ikubanni Peter , Oki Makanjuola ,   Department of Mechanical Engineering, Landmark University, Adediran Adeolu ,   Department of Mechanical Engineering, Landmark University, Akintola Sarah ,   Department of Petroleum Engineering, University of Ibadan, Adeleke Adekunle ,   Department of Mechanical Engineering, Nile University of Nigeria, Anyim Ikechukwu ,   Department of Mechanical Engineering, Landmark University, Adesina Olanrewaju ,   Department of Mechanical Engineering, Redeemer’s University, Efenovwe Lawrence ,   Department of Mechanical Engineering, Landmark University
Published: December 2023

This study investigated the inhibition characteristics of rice husk (RH) on corrosion of Aluminum 6061 in 1M hydrochloric acid. Gravimetric analysis and Scanning Electron Microscopy (SEM)/ Energy Dispersive X-ray analysis (EDX) as well as electrochemical studies revealed the potency of RH as a good inhibitor of the corrosion of Al 6061 in 1M HCl. Fourier Transform Infrared Spectroscopy (FTIR) indicated that –OH, C=C, and C=O with signals at (3317.19, 2932.9, 2848.2), (1631.8) and (1105.73, 1030.2, 447.15), respectively in RH were the viable active functional groups which adsorbed on the metal surface to effect reduction of corrosion rates. However, literature suggested the presence of amorphous silica in RH which served as a complimentary corrosion inhibitor. The corrosion current density of Al 6061 was reduced to 3.46 × 10−7 A/cm2 at 24 h as against 9.27 × 10−7 A/cm2 at the commencement of the potentiodynamic polarization measurements in inhibited 1M HCl. The control specimens exhibited an average corrosion rate of 3.86 × 10−6 A/cm2 in HCl solution at the start of this investigation as compared to the corrosion rate of 3.46 × 10−7 A/cm2 at 24 h of exposure in 5 mg RH- inhibited HCl. The obtained results gave a corrosion inhibition efficiency of about 90 to 92%.
Surface plasmon resonance chemical sensor modified with α-naphthylmethacrylate nano thin film for chloroform detection
Authors:   Materials Science and Nanotechnology Engineering Department, Usak University, Acikbas Yaser
Published: December 2023

The research on the rapid and sensitive detection of pollution caused by the products and technologies used has recently attracted attention in the literature. In the detection of volatile organic compounds (VOCs), polymers/monomers are used in the production of sensitive, fast-responding, reversible thin-film gas sensor elements. In this work, the monomer α-Naphthylmethacrylate was selected as thin film sensor element. The α-Naphthylmethacrylate-based nano thin films were prepared with technique of LB. Monomer LB thin films fabricated onto gold-coated glass substrate to investigate their vapour sensing properties by using Surface Plasmon Resonance (SPR) optical technique. This prepared monomer-based thin film sensor exposed to five different concentrations of chloroform vapors varying between 13.98x103-69.9x103 ppm and the sensor response values were recorded. Swelling dynamics’ of this monomer thin film sensor was also illuminated by using Fick's early-time diffusion law. Diffusion coefficients of α-Naphthylmethacrylate LB thin film sensor materials exposed to the five different concentrations of chloroform vapor were calculated with the help of reflected light intensity graph data and Fick's Law as a function of time. It was determined that the diffusion coefficient values of the first and second slope regions as varying between 5.72x10-17-21.97x10-17 cm2s-1 and 3.06x10-17-6.25x10-17 cm2s-1, respectively. SPR kinetic measurement results showed that α-Naphthylmethacrylate material is promising for the detection of chloroform vapor.
Effect of calcium carbonate nanoparticles on mechanical properties of coir-kenaf based epoxy hybrid composites: An analytical and simulation study
Authors:   Department of Mechanical and Automation Engineering, IGDTUW, Parashar Shikha , Chawla V.K. ,   Department of Mechanical and Automation Engineering, IGDTUW
Published: December 2023

The manufacturing sector is presently in search of sustainable materials that are lighter in weight, readily available, biodegradable, and cost-friendly. Natural fibers are observed to bring unblemished advancement in composite materials. In this research, a novel hybrid composite material has been analyzed. The composite comprises two different natural fibers, kenaf and coir fiber, reinforced in epoxy matrix with nanofillers of calcium carbonate particles. The weight percent of kenaf and coir fibers is maintained at 5.7% and 10%, whereas nanofillers is varied as 0%, 2%, and 4%, respectively, in all three samples. The elastic characteristics like the Longitudinal Modulus, and Transverse Modulus, are evaluated for the proposed composite utilizing five different analytical models, and are also interpreted using Representative Volume Element (RVE) analysis. The analytical results of the proposed composite are correlated with the experimental work in the earlier research. The influence of nanofiller is investigated and it has been observed that the composite with a higher filler content of 4 percent attains enhanced strength than a sample with a lower filler content of 0 and 2 wt. percent. The transverse modulus is noticed to uplift by 16.88%, and the longitudinal modulus by 11.14% on the mixing of CaCO3 particles in coir kenaf composite. Also, the composite is analyzed for hybridization effect, which proves to be one of the most promising ways to improve the features of the hybrid composite
The Effect of Views through Windows on Apartment Dwellers in an Urban Setting: A Case Study of Hyderabad Apartments
Authors:   Department of Architecture, Mehran University of Engineering & Technology, Jamshoro, Sindh 76020, Pakistan, Tanveer Sara , Qureshi Sabeen ,   Department of Architecture, Mehran University of Engineering & Technology, Jamshoro, Sindh 76020, Pakistan, Rasool Asifa ,   Department of Architecture, Mehran University of Engineering & Technology, Jamshoro, Sindh 76020, Pakistan
Published: December 2023

The rate of urbanisation is increasing in Pakistan as it develops. The connection to nature, however, is receding in urban settings as the country grows. Apartment buildings have been recognized as a characteristic type of urban housing due to the increasing intensity of land use in urban areas. In Hyderabad, one of the neglected aspects of urban living is the neglect of window design, orientation, and view through the window in apartment buildings. Windows are the primary means of communication between the inside and outside of the building. This paper highlights the significance of window views in urban setting in relation to sustainable development. Furthermore, the purpose of this research is to investigate the effect of window views on apartment dwellers in Hyderabad and how it affects the sustainability of a building. The case studies were conducted on apartments in Qasimabad, along with a questionnaire survey based on the residents' preferences for window views and how the existing setting affects their behavior. After analyzing literature, conducting case studies, and completing a survey questionnaire, results suggest that window views promote pleasant emotions, productivity, health, and well-being, which contribute to a sustainable development.
Wing Planform Analysis with Taper Ratio and Expansion Segment Variation with Lifting Line Theory
Authors:   Department of Engineering Physics, Institut Teknologi Sepuluh Nopember  Kampus ITS Sukolilo, Surabaya Indonesia 60111, S. Dafa Amien , Nugroho Gunawan ,   Department of Engineering Physics, Institut Teknologi Sepuluh Nopember  Kampus ITS Sukolilo, Surabaya Indonesia 60111
Published: December 2023

Tapered wing shape of a planform wing is still widely used amongst airplane and UAVs with subsonic speed. In the design process, a good consideration for a good taper ratio of a wing is required to obtain the optimal and distribution for the desired function of an aircraft. Additionally, addition of expansion segment on wing planform shape is often used to increase the performance of wings without the increase of wingspan. Several methods to analyze a wing shape are experimentation, computational luid dynamics, and analytical calculation. Analyzing with analytical calculation will present limited, but accurate outcomes due to the assumptions that are made during the calculation. This method, however, is inexpensive. This is why analytical calculation is still a common method to use in the design process of an aircraft, particularly in the early phase. Five variants of taper ratio and 3 variants that with expansion segment is analyzed using the Lifting Line Theory that utilizes Fourier series at subsonic speed. The results are the values of and with respect to and the distribution of and along the wingspan. Increasing the taper ratio results in the decrease of and the increase of , while adding an expansion segment will give results that are dependent on the added segment’s taper ratio.
Performance Analysis of Switched Reluctance Motor by Using Closed Loop Current Control Technique
Authors:   Department of Electrical and Electronics Engineering, CVR College of Engineering, Hyderabad 501510, Telangana, India, Reddy Ch. Lokeshwar , Kumar P. Satish ,   Department of Electrical Engineering, University College of Engineering, Osmania University, Hyderabad 500 007, Telangana, India, Rao J V G Rama ,   Department of Electrical and Electronics Engineering, BVC Institute of Technology and Science, Amalapuram, Andhrapradesh,  India, Sharanya M. ,   Department of Electrical and Electronics Engineering, Malla Reddy College of Engineering & Technology, Hyderabad, Telangana, India
Published: December 2023

This paper presents the performance analysis of an 6/4 3-phase switched reluctance motor in terms of current, flux, torque and speed. When the speed of the motor is low the current rises quickly. If the speed is large the increase in current is low. In low-speed region, the current can be controlled by using chop/hysteresis current control mode. In this mode a voltage of +Vdc and -Vdc is applied in such way the current is limited to a band. The bands can design around the reference value of current. The upper and lower bands can be designed based on the reference current. After the base speed we have to maintain current, current can’t increase quickly because speed becomes large, so in this region instead of keeping current constant the power is to be considered constant. When the speed is large this mode is not preferable. So still we have to maintain the power current has to build up, so we switch little earlier that angle is called advance angle. Angle by which voltage application is advanced that angle is the advance angle. The advance angle control can be used in such way that the current increase will happen in the lower inductance region only. The advancing of angle can be increased up to certain angles only i.e up to the lower value of inductance minimum point. The simulation has been carried out for 6/4 3-phase switched reluctance motor using MATLAB/ Simulink by applying closed loop current control technique. The detailed control of SRM for different speed modes has been carried out and the analysis of results demonstrated.
Effect of Lead on Strength Behaviour for Spiked Contaminated Soil
Authors:   Civil Engineering Studies, College of Engineering, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500, Permatang Pauh, Pulau Pinang, MALAYSIA, Zahari Mohamad Azwan , Osman Muhammad Hafeez ,   Civil Engineering Studies, College of Engineering, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500, Permatang Pauh, Pulau Pinang, MALAYSIA, Alias Salina ,   Civil Engineering Studies, College of Engineering, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500, Permatang Pauh, Pulau Pinang, MALAYSIA
Published: December 2023

Deterioration of geo-environmental quality caused by the heavy metal in contaminated soil leads to changes in physical, mechanical, and chemical properties of soil. It is important to study the effect of contamination of the geotechnical properties of soil. The main aim of this research is to study the impact of lead and incubation time on polluted soil compressibility. The soil samples were got from Kaolin Malaysia Sdn Bhd in Tapah Perak. The soil samples were spiked with two concentrations of lead nitrate (1000 mg/kg and 2000 mg/kg), and were incubated for 7, 14, 21, and 28 days. The contaminated samples were created using a mixture of distilled water and lead nitrate. The physical, mechanical, and chemical properties of control and contaminated samples were assessed to analyse the effect of lead nitrate on these properties. Lead nitrate causes the increasing of plastic limit and liquid limit, reduction of maximum dry density and optimum moisture content. In addition, the unconfined compressive strength was decreased by 4.2% for 1000mg/kg while 24.3% with 200 mg/kg. This is with increasing concentration of lead nitrate as well as incubation period. Collapsibility increases with increased concentration of lead nitrate and time of incubation due to increased compressibility capacity. The important thing about this study is to provide a database for the future development of the site area contaminated with heavy metals such as landfill, landfill, agriculture and industry.
The Need to Educate Foreign Workers Based on the Performance Factor in a Construction Project, Especially in a Highly Populated Area in Johor, Malaysia
Authors:   Camire, Taman Mount Austin, Johor Bahru, Johor, Malaysia, Hakim Zainal Mohd Hafizuddin , Md Nor Noorsuhada ,   Civil Engineering Studies, College of Engineering, Universiti Teknologi MARA, Cawangan Pulau Pinang, Kampus Permatang Pauh,Permatang Pauh, Pulau Pinang, Malaysia, Mat Ali Mohd Faisal ,   Cawangan Unit Korporat dan Hubungan Industri, Institut Kemahiran Tinggi Belia Negara (IKTBN) Bukit Mertajam, Pulau Pinang, Malaysia, Mat Saliah Soffian Noor ,   Civil Engineering Studies, College of Engineering, Universiti Teknologi MARA, Cawangan Pulau Pinang, Kampus Permatang Pauh,Permatang Pauh, Pulau Pinang, Malaysia, Hani Ismail Siti Isma ,   Civil Engineering Studies, College of Engineering, Universiti Teknologi MARA, Cawangan Pulau Pinang, Kampus Permatang Pauh,Permatang Pauh, Pulau Pinang, Malaysia, Nafiu Zadawa Abdullahi ,   Department of Quantity Surveying, Faculty of Environmental Technology, Abubakar Tafawa Balewa University, Bauchi, Nigeria
Published: December 2023

The problem of foreign worker is currently increasing due to many factors and has necessitated a comprehensive study to identify the critical factor that leads to the failure of construction projects. Therefore, the objective of this study is to investigate the factors affecting the performance of foreign labour so that the foreign worker can be trained and educated. Methodologically, a total of 68 questionnaires were distributed to respondents at construction sites in four districts of Johor Bahru, Kota Tinggi, Kulai and Pontian in Johor. The selected site was based on the study location, population, design criteria, sample size, sampling frame, sampling method and data collection method. The survey consisted of two sections, Sections A and B. Section A deals with the demographic profile of the respondents. Section B deals with the main factors affecting performance. The data was then analysed using descriptive analysis to determine the mean of the responses. The results show that inadequate health and safety awareness at the worksite is the most important factor affecting the performance of foreign workers. The results also show that the most negative influence of foreign workers is on the construction project. Therefore, the company needs to spend more resources on training the foreign workers. To overcome the problems, the company needs to set and pursue goals to improve the skills of the worker force. This factor is overcome through various strategies such as training foreign labours, monitoring their performance, communicating regularly with the workers and pursuing goals to improve the skills of the workers. The findings of this study can therefore be used to train and educate the foreign worker to perform better in construction projects, especially in heavily populated areas.
Tensioned Fabric Structures in Jungle Design Shape
Authors:   Centre for Civil Engineering Studies, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500  Pulau Pinang, Malaysia, Hooi Min Yee , Zi Nur Afifi ,   Centre for Civil Engineering Studies, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500  Pulau Pinang, Malaysia, Li-Sian Tey ,   Centre for Civil Engineering Studies, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500  Pulau Pinang, Malaysia, Senin Syahrul Fithry ,   Centre for Civil Engineering Studies, Universiti Teknologi MARA, Cawangan Pulau Pinang, Permatang Pauh Campus, 13500  Pulau Pinang, Malaysia
Published: December 2023

Tensioned fabric structure became a topic of discussion for many engineers because of its lightweight. This structure manages to resist all loads such as wind and rain. Due to the light in weight, tensioned fabric structures are normally designed to be in the form of equal tensioned surface or minimal surface. The major objective of this study is to generate three Jungle forms with minimal surface or equal tensioned surface to apply in infrastructure and to propose an alternative for engineers to consider the Jungle minimal surface models. More study found out that minimal surface of tensioned fabric structure help in sustainability the environment. The form of tensioned fabric structure of this structure was applied using mathematical equation which was then generated through MATLAB. The three Jungle forms tensioned fabric structure show minimal surface. The study might inspire the engineers to implement Jungle shape in tensioned fabric structures.
Antiplatelet Therapy for Secondary Prevention in Patients with Ischaemic Stroke and Transient Ischaemic Attack: A Retrospective Cohort Study in Malaysia
Authors:   Block B4, Institute for Clinical Research National Institutes of Health (NIH), Ministry of Health Malaysia No 1, Jalan Setia Murni U13/52 40170 Shah Alam, Selangor, Malaysia
Published: December 2023

In this study, we evaluated clinical outcomes of antiplatelet therapy for secondary prevention in ischaemic stroke and transient ischaemic attack (TIA) patients. This was a retrospective cohort study that included patients with newly diagnosed ischaemic stroke or TIA between 2014 and 2017 using data from routine practice in Malaysia. Patients were grouped into single antiplatelet therapy (SAPT) and dual antiplatelet therapy (DAPT) users. Primary outcome was composite of stroke, myocardial infarction, and all-cause death in 90 days and 1 year. Safety outcome was major bleeding events. Among 3344 stroke patients, 8.1% received DAPT and 91.2% received SAPT. The 1-year cumulative incidence of composite events was 16.0 and 7.2 per 100 person-years for SAPT and DAPT, respectively. Propensity score-matched analysis of Cox hazard model showed DAPT reduced the risk of composite event (hazard ratio (HR) 0.48; 95% CI 0.25-0.91) and recurrent stroke (HR 0.38; 95% CI 0.16-0.92) in 1-year follow-up. Results were not significant for myocardial infarction, all-cause death, and 90-day outcomes. The risks of bleeding were not significantly different between SAPT and DAPT. Treatment with DAPT after an ischaemic stroke/TIA was associated with reduced risk of the composite events (stroke, myocardial infarction, or death) and recurrent stroke at 1 year.
Translation, Validation and Reliability Testing of the Subjective Mental Effort Questionnaire (SMEQ) from English into the Malay Language
Authors:   Program of Occupational Therapy, Center for Rehabilitation and Special Needs Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Raja Muda Abdul Aziz Street, 50300, Kuala Lumpur, Malaysia.
Published: December 2023

A self-report tool called the Subjective Mental Effort Questionnaire (SMEQ) was used to evaluate a person’s mental workload function. Mental workload is also a widely used concept in cognitive ergonomics. Currently, assessment tools to measure cognitive ergonomic status have not been developed based on studies in Malaysian population. The study’s objectives were to translate, validate, and test the reliability of the SMEQ Malay version among Melaka-based allied health practitioners. Phases of translation, content validation, face validation, cognitive interviewing, and test-retest of the SMEQ Malay version were all included in the development process. The Malay version of the SMEQ had perfect content validity index (CVI) and Kappa scores for content validation. Face validity and cognitive interviews confirmed that the questionnaires had appropriate grammar, clarity, correct word spelling, accurate sentence structure, appropriate font size, and was a clear instrument structure for the target population. Further validation and reliability testing indicated that the SMEQ Malay version had good test-retest reliability, with an intraclass correlation coefficient (ICC) = 0.961 and an standard error of measurement (SEM) = 2.725. According to this study, the SMEQ Malay version was proven to be a viable and reliable instrument for evaluating mental workload function in the Malaysian population. Future studies are recommended to compare the SMEQ Malay version among different types of jobs in Malaysia using a larger sample size and investigate complete psychometric testing among various occupations and tasks.
Progressive Oestrogen Deficiency in a Young Woman with 45X/46XX Mosaicism: A Case Report
Authors:   Department of Family Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, 56000 Kuala Lumpur, Malaysia.
Published: December 2023

Oestrogen is a vital hormone for woman’s health. Naturally, oestrogen hormone level begins to gradually decline leading to related symptoms after the age of 40 years in most women. This case report illustrates a progressive oestrogen deficiency in young woman since she was 19 years old. She was having hypomenorrhea for a year followed with amenorrhoea and was managed conservatively including progestogen challenge for about a year. She responded to the treatment once and remained amenorrhoeic thereafter. She was referred to our centre at 22 years old for further evaluation of premature ovarian insufficiency primarily concerning her fertility. Clinical examination showed a thin young woman with breasts, axillary and pubic hair of Tanner Stage 3. Blood investigation showed low oestrogen level with persistently high gonadotrophins suggestive of primary ovarian insufficiency. The urogenital pelvic ultrasound showed a small thin uterus with normal ovaries. She was diagnosed with Turner Syndrome of 45X/46XX mosaicism based on a blood karyotype test. The lack of typical feature of Turner Syndrome in this case had delayed the initial investigations and management. This case report aimed to highlight on the importance of a comprehensive evaluation in young women presenting with chronic oestrogen deficiency state. This will allow an early diagnosis and treatment of rare condition like mosaic Turner Syndrome and thus, preventing complications.
Reinforcement Learning Methods and Algorithms for Modeling Individual Trajectories of Professional Development
Authors:   Ufa University of Science and Technology, Ufa, 450076, Russian Federation, Orlova E. V.
Published: December 2023

Corporate human capital is one of the most important drivers of sustainable economic growth that is becoming increasingly important under changing nature of work. Due to the expansion of various areas of human activity, an employee portrait is getting multifaceted. Therefore, the problem of human capital management based on the individual trajectories of professional development, aimed at increasing the labor efficiency and contributing to the growth of he corporate operational efficiency, is relevant, timely, socially and economically significant. The paper proposes an approach for the dynamic regimes for human capital development (DRHC), to design individual trajectories for the employees professional development, based on reinforcement learning methods. The DRHC develops an optimal management regime as a set of programs aimed at developing an employee in the professional field, taking into account their individual characteristics (health quality, major and interdisciplinary competencies, motivation and social capital). The DRHC architecture consists of an environment — an employee model as a Markov decision making process and an agent — decision making center of a company. The DRHC uses Double Deep Q-Network algorithms to maximize the agents utility function. The implementation of the proposed by DRHC policies would enhance the corporate HC quality, improve its resource efficiency and ensure the performance growth
Psychological Aspects and Opinions about Some Typical Robots and Robots in General
Authors:   University of Debrecen, Psychology Institution, Őrsi Balázs , Csukonyi Csilla ,   University of Debrecen, Psychology Institution
Published: December 2023

It is a well-known challenge for robot designers, developers and manufacturers that certain personalities and characteristics of people can result in resistance towards or outright refusal of human-robot interactions. With this in mind, we conducted qualitative research to collect information about what people think about some typical robots (Spot, Atlas, Lovot). Fifty-eight participants were interviewed during focus group sessions. Based on responses, we could conclude that the Spot robot was considered ugly and primarily useless, the Atlas was regarded neutrally and in Lovot’s case participants blamed developers of such robots and societies that encouraged this type of robots. Our main contribution is qualitative data about opinions of these robots, which can be crucial feedback information for developers.
A Case of Surgical Treatment of Lower Molars in a Mesolithic Sample from a Cemetery on the Yuzhny Oleniy Ostrov, Karelia, Russia
Authors:   Peter the Great Museum of Anthropology and Ethnography (Kunstkamera), Russian Academy of Sciences, Zubova A. V. ,   Institute of Archaeology and Ethnography, Siberian Branch, Russian Academy of Sciences, Pikhur O. L. ,   St. Petersburg Institute of Bioregulation and Gerontology,   Kursk State Medical University, Moiseyev V. G. ,   Peter the Great Museum of Anthropology and Ethnography (Kunstkamera), Russian Academy of Sciences, Malyutina A. A. ,   Institute for the History of Material Culture, Russian Academy of Sciences, Obodovskiy A. V. ,   St. Petersburg Electrotechnical University “LETI”, Kalmina O. A. ,   Penza State University
Published: December 2023

В статье рассматривается самый древний на территории Северной Евразии случай хирургического лечения постоянных моляров нижней челюсти. Он был обнаружен у пожилой женщины, погребенной в мезолитическом могильнике на Южном Оленьем острове в Онежском озере (Южная Карелия, 8 250-8 050 кал. л.н.). Целью исследования являлась реконструкция технологии хирургических вмешательств в зубочелюстную систему, диагностика и описание патогенеза заболеваний, ставших их причиной. Для этого было проведено стоматологическое обследование зубов и костной ткани верхней и нижней челюсти и трасологический анализ выявленных повреждений. Установлено, что в последние месяцы жизни погребенной было сделано несколько стоматологических операций: удален нижний левый третий моляр и поэтапно извлечены отломки дистальной части коронки и дистального корня нижнего правого первого моляра, расколовшегося в результате травмы. Первая операция прошла успешно, женщина прожила как минимум два месяца после ее выполнения. Извлечение лингвальной части дистального корня и прилежащего фрагмента коронки также было успешно выполнено как минимум за два месяца до смерти, скорее всего, сразу после травмирующего события. Мезиальную часть коронки удалили непосредственно перед смертью. Аналогий описанному случаю извлечения отломков травмированного зуба нам неизвестно. Операцию по удалению нижнего третьего моляра можно сравнить только с древнейшим из ранее известных случаев, описанным в серии из крепости Пукара-де-Тилкара в Северной Аргентине (XV-XVI вв. н.э.). Показания к хирургическому вмешательству частично совпадают и включают осложнения апикального периодонтита и развитие остеомиелита. Однако технология операции и ее организационное обеспечение различаются.
Constructive Functions of Dreams: From a Theoretical Model to an Empirical Validation. Part 1
Authors: Osin E.N. , Egorova P.A. , Kedrova N.B.
Published: December 2023

The article presents a description of the theoretical model of dreams and constructive dreaming, developed by a team of authors (Osin E.N., Kedrova N.B., Egorova P.A.). The dreaming is considered by the authors as a phenomenon of culture. The article provides a brief comparative analysis of the content of the concepts of “dream” and “dreaming” in English-speaking and Russian-speaking cultures, and also shows the differences in psychological approaches to understanding dreams and dreaming, depending on the cultural context. The paper provides definitions of dreams and constructive dreaming, discusses in detail the genesis of a dream, its content and types, as well as the positive functions of daydreams and constructive dreaming in the regulation of mental activity: development of intrinsic motivation, orientation in the decision-making process, development of a future time perspective, development of values-based motivation, support of psychological well-being. Based on the theoretical model we formulate the hypotheses for an empirical study of the positive functions of dreams and constructive dreaming. The results are presented in the second part of the work.
Hydroxychloroquine Modulates m6A RNA Methylation in Prostate Cancer Cells
Authors: Yanar Sevinc , Bal Albayrak Merve Gülsen
Published: December 2023

Prostate cancer ranks as the second most prevalent cancer in men globally. One of the evolving subjects of investigation in prostate cancer is the role of N6-methyladenosine (m6A) modifications. Hydroxychloroquine (HCQ), an autophagy inhibitor, was shown to be promising in enhancing the response to chemotherapy in prostate cancer. The interplay between autophagy and m6A is an emerging area of research. However, the relationship between m6A modifications and HCQ remains unclear. The objective of this study was to examine the effect of HCQ on the regulation of m6A methylation in prostate cancer. Initially, the cytotoxic effect of HCQ on LNCaP and PC3 cells was evaluated. The IC50 values for each cell were calculated. Finally, m6A levels in HCQ-treated and untreated cells were determined using m6A RNA methylation quantification kit. HCQ showed a significant dose- and time-dependent reduction in cell viability. Following HCQ treatment, a statistically significant decrease in m6A levels was observed: from 0.050±0.001% to 0.013±0.02% in PC3 cells and from 0.039±0.001% to 0.016±0.01% in LNCaP cells. The study unveils for the first time that HCQ affects m6A methylation in prostate cancer. The impact of autophagy inhibitor HCQ on m6A modifications introduces a novel dimension to its potential mechanisms of action.
Green Synthesis of CuO Nanoparticles Using Tragopogon porrifolius and Their Antioxidant and Photocatalytic Applications
Authors: Topal Canbaz Gamze
Published: December 2023

Copper oxide nanoparticles (CuO NPs) were produced by green synthesis method which is a cheap, easy and effective method using Tragopogon porrifolius extract. The shape, bond and crystal structure of the nanoparticles were determined by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and X-ray diffractometer (XRD) analysis methods. SEM analysis showed that the particles were spherical and EDX analysis showed the elemental composition of Cu and O as Cu 58.17 % and O 32.73 %. Cu-O bond structure was identified in FTIR analysis. In XRD analysis, peaks defining CuO NPs were observed. The antioxidant and photocatalytic activity of the synthesized CuO NPs were investigated. Antioxidant capacities were examined in the range of 50-500 μg/mL. The free radical scavenging activity of the nanoparticles was determined as 70.75 % at a concentration of 500 μg/mL. In photocatalytic studies, Reactive Red 120 (RR 120) dye degradation was investigated. The degradation time was calculated as 76 % in 30 min.