In this study, we design and construct a low-cost experimental kit for the force on a straight current-carrying conductor in a magnetic field experiment, namely EM-FOR. The kit consists of several pairs of rectangular-shaped permanent magnets with different polarities facing each other on a U-shaped aluminium casing as the source of the magnetic field, a straight copper wire at the centre between the two magnets as the electrical conductor, conductor rings and connecting wires to connect conductor and electrical source, and an electronic balance to measure the magnitude and to determine the direction of the force on a straight current-carrying conductor in a magnetic field. The design of the EM-FOR experimental kit was validated by determining the magnitude and direction of the force on a straight current-carrying conductor in a magnetic field for normal and reverse connections to a power supply. The constructed kit can be utilized for three experiments: the effects of applied current,.....

42 hits

Municipal solid waste(MSW) management has been a growing problem in fast-developing cities. A considerable amount of solid waste is generated daily and disposed anywhere, which creates an unhealthy environment. This study aims to develop a model to determine household solid waste (HSW) generation using multiple linear regression and identify suitable landfill sites to ensure proper MSW disposal in Rangpur City, Bangladesh. Socioeconomic variables data like average monthly income, educational level, family size, age of family head, and average HSW generation per day were collected from 381 respondents through stratified random sampling with a 95% confidence level. Multi-criteria decision analysis (MCDA) was performed using variables like surface water, slope, road network, and land use through GIS and remote sensing to find suitable landfill sites. Results of the model show no multicollinearity as the variance inflation factor was estimated to be less than 2 for each independent variabl.....

28 hits

Manipulating surface plasmon resonance (SPR) of silver (Ag) and gold (Au) nanoparticles (NPs) in amorphous material may open new possibilities in optic and photonic fields. Driven by this fact, heat treatments (HT) were used to tune the excitation mode of SPR. The Nd3+ doped magnesium-zinc-sulfophosphate glasses embedded with Ag and Au NPs were heat-treated at 450 C for 6 and 12 h and characterized using X-ray diffractometer (XRD), high-resolution transmission electron microscope (HRTEM), UVVisNIR absorption and photoluminescence (PL) spectrometer. The mean size of NPs was slightly reduced (4.68 nm? 4.35 nm) after 12 h of HT due to the elastic ripening process, causes by internal pressure within NPs. Unusual multiple SPR bands were evidence around 419, 481, 613, 676, 776, 848 and 939 nm after the glass (AgAu6h) is heat-treated for 6 h. Thirteen absorption bands are recorded within 326875 nm, corresponding to the Nd3+ ion transitions. The NIR PL bands of Nd3+ ion were detected around 87.....

28 hits

Rapid urbanization accelerates the rate of carbon emissions (CE), resulting in unfavorable fluctuating in climatic conditions of urban settings. One of the prominent reasons behind these climatic anomalies is the direct result of CO2 emission and heat-trapping gasses from industries and urban built-up areas. This study addresses the ongoing CE issues in Khulna City by analyzing CE from residential, commercial, and industrial land use. Moreover, the study explores diverse sources of CE from intense energy consumption using electricity, gas, fuel, and wood. Consequently, the carbon footprint (CF) has been estimated using specific CE coefficients for each landuse category. Specific concentration of CE for each landuse category is demonstrated on maps using geospatial and kernel density applications. Results suggested Khulna Citys monthly CE have been estimated 55,536,435kg from residential, 14,612,942kg from commercial and 2,606,823kg from industrial land use. From residential landuse, ea.....

23 hits

This work aimed to investigate, for the first time, the chemical composition and cytotoxicity of Dillenia reticulata King's essential oil. The essential oil was obtained through hydrodistillation, and its volatile components were analyzed through gas chromatography (GC-FID) and gas chromatography-mass spectrometry (GC-MS) techniques. Twelve components, which constitutes more than 99.49% of oil content, were successfully identified. The most prominent components were bicyclogermacrene (44.18%), germacrene D (14.49%), ?-gurjunene (12.59%), and elemol (12.25%). The cytotoxicity of essential oil was evaluated using an MTT assay. The essential oil exhibited cytotoxicity against three cancer cell lines which are HepG2, MCF7 and A549 with the IC50 values ranging from 61.5-68.5 ?g/mL. The present study highlights the potential of using essential oil as an alternative for the development of chemopreventive or cosmetic agents for the pharmaceutical industry. 2023 Chemical Society of Ethiopia an.....

39 hits

Microgreens have been chosen as a sustainable dietary staple food due to their high nutritional value and short harvesting time. However, researches about the actual comparison of the nutritional value between microgreens and their respective adult vegetables is still missing. Furthermore, in a hydroponic system, chitosan nanoparticles (CNPs) can be used as an alternative sustainable nutrient formulation to the conventional/basic nutrient formulation solution. As a result, in this study, the quality, yield and nutritional content of hydroponically cultured microgreens versus adult of Bok Choy (Brassica rapa subsp. Chinensis (L.) Hanelt) vegetables were examined and evaluated in response to CNPs treatments and/or fertilizer supplementation that were grown under the same conditions and environments. CNPs have shown incredible potential as a sustainable alternative nutrient supplement in the growth of Bok Choy microgreens and adults. The nutritional value results backed up these claims as.....

35 hits

A solar dryer hybrid photovoltaic thermal (PV/T) system has been designed, built and its performance has been studied. This research aims to develop a stand-alone solar dyer system, portable and less maintenance. This system consists of three main parts; PV/T system with configuration-Z thermal absorber plate, multi-direction solar collector with cross absorber plate and drying chamber. The designed system is named multi-direction solar collector as the solar radiates through upper and around the sides. This situation may increase the amount of heat that will absorb by the absorber plate. Six sets of cross absorber plates were used in the multi-direction solar collector and they were assembled row by row. PV/T airflow uses configuration-Z absorber plate which is placed under the photovoltaic (PV) module. The amount of heat produced from the PV/T configuration-Z is used as the pre-heat before the hot air flows to the multi-direction solar collector, while electric energy from PV is used.....

30 hits

The purpose of this study was to examine the impact of sedentary stay at home due to the covid-19 pandemic on physical fitness and to examine the effects of home-based physical activity on physical fitness levels during the covid-19 crisis in Indonesia. This study used a mixed method sequential exploration design consisting of a quantitative stage and a qualitative stage. The sample used was 228 children and adolescents aged 5-17 years, n = 143 adults and elderly > 17, n = 85 people, participated in this study voluntarily. Sampling was carried out for the experimental group at random (n: 143) and the control group (n: 85). The experimental group engaged in 8 weeks of home-based physical activity delivered in person and via WhatsApp groups. Data were collected through the Indonesian Physical Fitness Test and semi-structured interview questions. Data analysis using a two-way mixed ANOVA was used to determine the effect of home-based physical activity carried out for 8 weeks with a durati.....

41 hits

The technology acceptance model (TAM) is an information systems model that models how consumers use and accept technology. Scholars have implemented TAM widely to examine the effectiveness and ease of use of online learning. Therefore, this analysis comprehensively analyses TAMs role in accepting online learning platforms by conducting bibliometric and content analysis based on the PRISMA framework. Insights into technology acceptance models were determined by bibliometrics analysis with VosViewer and content analysis. Methods: This study expanded all research from 2002 to 2020. A sum of 120 publications was analysed in January 2022 as documented in the Scopus database after applying the including and excluding criteria in addition to the manual evaluation. Results: This reviews findings identified the most compelling subjects covered by the journal. Most prolific countries, educational institutions, Journals, and authors were identified. Additionally, the results demonstrate several s.....

40 hits

A diagnosis of a chronic illness, such as cancer, can lead to a crisis in one's life. Although cancer patients face many biopsychosocial challenges, the literature has pointed to resilience as a key factor in coming to terms with the diagnosis and treatment. Though resilience has been discussed in various disciplines, and also from a socio-cultural perspective, there is still no universal consensus about its defining features. Furthermore, most studies have employed a quantitative approach in the understanding of what causes resilience. This qualitative study discusses the results of interviews among 18 Malaysian women with breast cancer, exploring what made these woman resilient. A thematic analysis uncovered seven themes related to the participants pathways towards resilience: drastic changes of body-image; self-reflection; spiritual resources; restoration of confidence; informal and formal support; and life appreciation. This study is vital to understanding the impact that resilienc.....

30 hits