bluuebunny/crossref_metadata_2025 huggingface dataset:
Visual communication analysis the effect of signs and colors on traffic safety in Jakarta
Authors: Utoyo A W , Aprilia H D , Kuntjoro R A D R I , Kurniawan-Jakti A
Published: April 2021

About 90% of the information needed for driving is received visually by the driver. Only a little information is received with hearing (horns and shock markers) and a sense of touch (tactile markers and rough roads). Most of the information they get is visual. The two most common equipment used by technicians to give information is signs and markers consisting of signs, colors, and words. Traffic signs are elements defined as a special set of code labels intended for traffic users, which are in a vertical field for traffic areas. It is a basic means of communication between authorities and road users. Standards and guidelines suggest the use of words and color codes that are appropriate for conveying the different intensity of hazards. Red, yellow, and blue indicates a decrease in the intensity of the danger. Likewise, danger, warning, and attention show the danger in decreasing intensity even though some studies find no significant differences in the hazard assessment of warning and attention words. Signs and color codes used in our study are capable of giving meaningful meaning, warning, attention, thinking, and notification. For colors, it will be red, yellow, green, white, blue, green, and orange. We will evaluate perceptions of implied danger and language effects.
Implementation of Jepara wood carving patterns for wastra craftsmanship in Troso – A design thinking to create a sustainable creative industry
Authors: Caroline O S , Fajarwati A A S , Octarina  , Adriani S
Published: April 2021

The pattern of each woven fabric (wastra) describes the cultural characteristics of the area where it is made. The pattern of wastra becomes the strong identity of the community and the place where the wastra is made. Troso village is one of the centers of the wastra artisan, known as Troso wastra. Troso village is introduced as one of the shopping attractions in Jepara, in addition to carving production. Although Troso is known as a producer of weaving production, it does not have an authentic wastra pattern and tends to copy it from other places. This phenomenon happens because of the demands of resellers that come from other places. As an area filled with potentials, a research team in Ruma Japara has noticed that a study is needed to challenge the Troso craftsmanship to create its pattern using their local wisdom based on their artisan knowledge to create a sustainable creative industry. This study uses the design thinking method and qualitative methodology to collect data. The result is a pattern for Troso wastra transferred from the Jepara wood carving pattern.
The effect of work satisfaction on turnover intention in millennials generation in Indonesia Unicorn Company with work engagement as moderating variable
Authors: Pradipto Y D , Nabila
Published: April 2021

This study aims to see the effect of job satisfaction on turnover intention in the millennials generation who work in Indonesian Unicorn companies. This quantitative research uses 200 millennial employees (19-39 years) who work in Indonesian Unicorn companies as the subject. Data collection techniques in this study are by collecting questionnaires using turnover intention scale (TIS) for dependent variables and Job Descriptive Index (JDI) for independent variables. The results of this study are shown using structural equation modeling in the smartPLS application. Based on the regression test conducted, it can be concluded that there is an impact on job satisfaction turnover intention in the millennials in Indonesian unicorn companies (r = 0,523, p < 0.05).
Women’s empowerment for socioeconomic sustainable development in Singapore
Authors: Dewi G D P
Published: April 2021

Multiple studies essentially state that women’s empowerment and sustainable development are closely interrelated. Empowering women possibly increases women’s political leadership ability, which may have a direct or indirect impact on sustainable development. In the case of Singapore, it finds distinction in defining the linkage between women’s political participation and sustainable development. This paper provides a three-dimensional model of women’s empowerment and limits the data set in 1990-2019 to find how women’s participation in politics contribute to the economic and social development in Singapore. Using a qualitative method, this study finds that women’s participation in parliament has not affected the improvement of health expenditure, labor force participation, and GDP per capita. It is due to restrictions on the rights, responsibilities, activities, access, and control between men and women (gender inequality) who are intentionally constructed through education systems, economic and political systems, legislation, culture, and traditions.
Online training: The application of the Society 5.0 concept
Authors: Michael
Published: April 2021

Society 5.0 has been introduced, and technology has played an essential role in achieving the aim of improving the prosperity of human beings. Businesses that often provide training to their employees must adapt to how the training course is conducted. While most training courses are conducted face-to-face, online training courses with technology utilization must be considered. Thus, this research intends to look at the effectiveness of online training in the context of Business English training and the perspectives of the subjects on online training methods. Mixed methods research was conducted with 30 subjects in total. A pre-test and a post-test were administered to investigate the effectiveness, and a questionnaire was distributed to explore the subjects’ perspectives. The results have shown that online training is effective as the test results show a dramatic increase. In addition, the subjects also state their approval of training via online methods.
The role of visual communication design to increase public literacy on the history of Spice Route in supporting Indonesia’s proposal toward UNESCO’s World Cultural Heritage
Authors: Kumoratih D , Anindita G , Ariesta I , Tholkhah E
Published: April 2021

Previous studies show that the process of reproduction of nationalism through the reconstruction of national history and national identity is no longer always the elite’s initiation. Democratization and globalization also provide space for people to re-interpret the ideal picture of Indonesia. The learning tradition of contemporary society in general is an interesting fundamental issue. Global connectivity and the advancement of information technology have also created new habits in acquiring knowledge. As a result, contemporary society is increasingly ignorant of history and alienated from its cultural roots. This research intends to examine the extent to which visual communication design can increase public literacy, especially about the state efforts in reconstructing national history and Indonesian identity through the cultural-historical narrative of Spice Route. In line with President Joko Widodo’s vision to position Indonesia as the global maritime fulcrum in 2045, the legacy of the spice trade route, which is also an intercultural exchange route, will be proposed by the government of Indonesia as a World Cultural Heritage to UNESCO. The methods used in this qualitative study are auto-ethnography, participant-observation, in-depth interviews, and visual communication design methods through analysis of form-content-context, both descriptive and reflective. Through the findings, visual communication design has great potentials in increasing public knowledge on Spice Route narrative, especially in encouraging curiosity and willingness to learn more about Indonesian history and cultures.
Educational animation: Environmentally friendly palm oil based products
Authors: Riyadi T , Nathania
Published: April 2021

The size of the palm oil industry in Indonesia raises concerns about environmental sustainability, but on the other hand, this industry is also needed by the community. It has led to the emergence of organizations or institutions that apply certification standards in the palm oil industry, one of which is the Roundtable on Sustainable Palm Oil (RSPO). This animation is created to introduce the RSPO and invite the audience to understand the products made from palm oil that care about the environment. The message delivered about RSPO-labeled products is that the products are more responsible for sustainable environmental issues. This animation production method goes through pre-production stages that focus on the core message, production in the form of visual asset design to the animation process, and post-production for artistic finishing touches. The final result is an educative animated film that is easy to understand and packaged with an attractive design.
Usability and aesthetics of website design to measure Indonesian teacher competency 4.0
Authors: Indrianti Y , Sasmoko  , Rosyidi U , Udjaja Y
Published: April 2021

Website development that considers usability and aesthetics will have an impact on achieving the website development goals themselves. Ease of users in using the features provided and the appearance of beauty that will increase user comfort becomes an important factor that must be considered in the website development process. This research is an attempt to incorporate the concepts of usability and aesthetics in the development of the Teacher Competencies 4.0 website, which is a website aimed at Indonesian teachers in conducting self-assessment of their competencies whether they are in accordance with the competency needs of 4.0. This research used Neuroresearch and Website Development Life Cycle as the research methods. The results of the research are website designs that have taken into account the usability and aesthetics so that the website is expected to be able to be felt by the teacher and continue to continuously use the website to carry out continuous assessment.
Infographie, data visualization, and the danger of reality distortion: The case study of Australia fire 2020
Authors: Suhardjono L , Oscario A , Luzar L , Sriherlambang B
Published: April 2021

Nowadays, the stream of information to promote environmental consciousness are profoundly dominated by the existence of infographics and data visualization. Beside visually attractive, it is crucial for them to deliver a clear and concise information. This research will uncover infographics and data visualization in conjunction with news about the fire in Australia continent, early in 2020. Some of these visualizations were potentially giving a misleading interpretation to its reader. This research aims to explore the effectiveness of infographics and data visualization channel from the perspective of visual communication design discipline; both from its aesthetics dimension and its content data accuracy. As the outcome, this research is expected to be a reminder that the amount of information in the world is limitless. It is our shared responsibility to be mindful towards each and every material that we consume and share with others.
Retalism mechanism in Indonesian and European Union trade disputes regarding CPO commodity exports
Authors: Zaki M R S , Syahputra R
Published: April 2021

In 2019, the European Union Parliament made a policy to stop the use of Crude Palm Oil (CPO). The decision was taken after the European Union Parliament agreed to use environmentally friendly renewable energy as stated in the “Report on the Proposal for a Directive of the European Parliament and the Council on the Promotion of the use of Energy from Renewable Sources”. This policy makes Indonesia one of the largest CPO producers with the potential to lose its market. This policy makes Indonesia conduct a counter attack (retaliation) by using the World Trade Organization (WTO). Previously the President Republic of Indonesia, Joko Widodo also conducted retaliation in the form of a boycott products from the European Union such as airplanes from the French manufacturer, Airbus. The retaliation is considered effective because Indonesia accounts for 5.7% of the Airbus market in Asia Pacific with a valUni Eropa of US $ 42.8 billion. This amount is still far greater than Indonesia’s CPO exports on the European Union market which is only worth US$ 4 billion. Its means that if this retaliation occurs, Indonesia will have a better bargaining than the European Union, so it is hoped that the European Union can soften and end trade disputes between the European Union and Indonesia.
The impact of e-business on competitive advantage through innovation organization on financial company listed at Indonesia stock exchange
Authors: Mulyono  , Suprapto A T
Published: April 2021

This research aims to determine the impact of e-business through innovation organization on competitive advantage. Data collection is done by distributing questionnaires and focus group discussion with company management in a financial company that is listed on the Indonesia Stock Exchange (IDX). The analytical method used structural equation modelling (SEM) using software Smart-PLS 3.0 version. The research focuses on e-business and competitive advantage in the financial industry with respondents is top management in a financial company and. The results of the study conclude that e-business and innovation organization has a positive and significant effect on Competitive Advantage. E-Business through innovation organization has a positive and significant effect on Competitive Advantage.
Corporate governance award and performance of Indonesian LQ45 firms
Authors: Limijaya A , Hutagaol-Martowidjojo Y , Annisa S
Published: April 2021

This research aims to examine the impact of CGPI award on firm’s operational performance. Contrary to our expectation, using a sample of 45 companies listed in LQ45 index during 3-year observation period, it is found that corporate governance award has a significant negative relationship with companies’ performance. We use CGPI awardee/non-awardee to represent corporate governance award and ROA as a proxy of firm performance. Control variables included in this research consist of independent commissioners’ independency, board of director size and firm size. The unexpected negative relationship might indicate that the additional costs that must be borne by companies to implement good corporate governance practices, eventually become disadvantageous to their operational performance. The similar conclusion is found for the longer-term performance. Furthermore, we also find that the average ROA of CGPI awardees is much lower than the non-awardees, arguably due to the costly efforts put forward by the awardees to carry out and report on their corporate governance practices. The result of this research confirms the stewardship theory, in which the awardees put management as a steward and govern the firms to grow in size, however it comes with a certain cost that reduces their profitability.
Do generation Y and Z really concern about environmental issues?
Authors: Dwidienawati D , Abdinagoro S B , Gandasari D , Tjahjana D
Published: April 2021

Generation Z has started entering adulthood and the workplace in the last couple of years. Both generations Y and Z will be a major force in workplace as well as marketforce. Both generations shared similar characteristics, e.g. digital naïve, constant connection online, high confidence, and demanding. However, they are born and raised in different economic and life situation. Those differences will affect the beliefs, behaviors, and values. Understanding this will help companies and other organizations who work to tackle the environmental issue on how to approach and ensure their participation. At present, there remains limited studies to see the difference between both generations’ characteristics. This research aims to see whether there are differences in concern on the environmental issue between groups. A descriptive quantitative study was conducted in generation Y and Z in Indonesia. Samples were collected using snowball methods. Four-point Likert scale questionnaires were designed and distributed. 140 questionnaires were collected and eligible to be analyzed. The result shows there are no significant differences in the concern of the environment, participate in reducing plastic use, and the opinion of the importance of a company to have a sustainability development program. However, there is a significant difference in actively participating in an event promoting environmental issues. This research contributes to the body of evidence on Generation Y and Z characteristics.
Women’s representation and government welfare spending in Indonesia 1970—2020
Authors: Prihatini E S
Published: April 2021

Women’s participation in decision-making process is imperative in achieving Sustainable Development Goals (SGDs), as their representation will improve the quality of development in the society. Cross-national studies suggest that the number of women in parliament and in the labor-force are closely associated with higher government spending on education and health. Other studies highlight the correlation between women’s share in parliament with better economic performance measured by GDP per capita. Using a unique dataset for the years spanning from 1970 to 2020, this paper aims to unpack the experience in Indonesia, an emerging economy in Asia with a relatively stable democracy. The findings suggest that women’s presence in the national parliament correlates strongly positive with higher GDP. Also, with a weaker correlation, more women elected as legislator, bigger fiscal allocation by the government for education and health. On the other hand, the impact of women’s participation in the labor force has less significant connection with government welfare spending in Indonesia.
Science art as an impetus for the development of high-tech cities
Authors: Fadeeva T E , Staruseva-Persheeva A D , Davidov D G
Published: April 2021

Science Art over the past 20 years has become one of the most relevant and rapidly developing forms of contemporary art, it reveals the possibilities of innovative interdisciplinary projects in which an artist and designers work in collaboration with scientists, engineers and technologists, expanding the boundaries of the concept of “art”, on the one hand, and revealing the humanistic potential of the latest achievements of science, on the other.

These processes also affect the urban environment. High-tech urban clusters, accumulating significant scientific potential, through the opening of science art laboratories, in which collaborative projects of researchers and artists are carried out, stimulate the clusters development, using the intuitive principles of art. This article analyzes the examples of a successfully functioning Ljudmila laboratory in Ljubljana, the International Synthetic Aesthetics project, the My Neighborhood social networking project, and describes the case of the restoration of a historic elm tree in Biscarrosse, France. According to the results of the study, the authors conclude that cooperation between scientists and people of creative professions can turn out to be a significant vector for the development of not only science and art, but also social life in the cities where the practice of Science Art is used.
Legal problems of providing the renovation of built-up urban areas in Russia
Authors: Romanova O A
Published: April 2021

Based on the analysis of the current Russian urban planning legislation and the practice of its application, the paper studies the system of legal support for the renovation of built-up urban areas in the Russian Federation, shows the features of the current legal forms and mechanisms for providing the renovation of territories, analyzes the conceptual apparatus in the field of renovation, identifies the main problems of legal support for the renovation of built-up areas and shows the directions of its further improvement.
End-to-end digital technologies in “smart cities” of Russia
Authors: Guseva A I , Kireev V S , Bochkarev P V , Kuznetsov I A , Filippov S A
Published: April 2021

The article is dedicated to the end-to-end digital technologies of Industrial Internet of Things, big data and artificial intelligence used in “Smart City” project. The focus is on TRL and CRL technologies technological and commercial readiness assessment systems. Information system for monitoring, remote control and support of engineering systems technical condition at Housing and Utility Infrastructure facilities is studied and its readiness for use in “Smart City” project is evaluated.
A framework for Implementing Energy Retrofit Projects in Existing Building in South Africa
Authors: Okorafor C. , Chetty R. , Haupt T.
Published: April 2021

The purpose of this paper is to propose a framework for implementing the delivery of energy retrofit project in existing buildings. This framework is premised on the need for the attainment of a sustainable built environment through delivering building energy retrofit. A mixed design approach that is situated on pragmatic philosophical stance was adopted to unravel the complexities of retrofitting existing buildings. Structured and semi-structured interview were administered to project’s role-players in order to elicit data for the framework development. The findings give insight into various components of the framework. It suggest that a building analysis, which is geared towards evaluating the characteristics of the energy systems, a walkthrough survey, where potential energy-saving measures are identified, using energy analysis and simulation tools, which serves to establish energy use and operating conditions of the building, evaluation of energy-saving measures, and, finally, implementation of the energy efficiency measures are crucial in any implementation framework. The developed framework provides an innovative and integrated route for achieving sustainability in retrofit trade. The framework provides a comprehensive approach of delivering energy retrofit in an existing building.
Evaluation of the Impacts of Customers’ Behavior on Utility Firms Revenue
Authors: Ighravwe D. E. , Mashao D.
Published: April 2021

As the world embraces the fourth industrial revolution, the relationship between customers and their clients will change. The rate of this change might vary from one organization to another; revenues from existing or new businesses that refuse to embrace this revolution will experience a steady decrease. Utility firms, whose operations are affected by this revolution, must devise a means of estimating the number of customers that will deflect from a grid. This article, therefore, presents a system dynamics (SD) model for utility firms’ revenue estimation. The model was used to study the relationship among the parameters that influence households’ connection and disconnection from a grid. A case study of households in South Africa was used to test the proposed model applicability. We observed that the model responses to change in internal and external parameters that affect utility firms’ revenue. When the administrative factor is 0.4, less number of households disconnect from the grid when it was compared with an administrative factor of 0.6. In addition, there was an increase of 12.04% in revenue when the administrative factor was changed from 0.4 to 0.6. Also, there was a 15.16% increase in revenue when the technological advancement factor was changed from 0.4 to 0.6. The model’s results show that it can be used to support a decision-making process in a utility firm.
Performance of mixed matrix nanofiltration membranes in wastewater treatment: A review
Authors: Agboola O. , Fayomi O.S.I. , Oni B.A. , Ayeni A.O. , Sadiku E.R. , Popoola A.P.I. , Moropeng L. , Adegbola S.T. , Daramola D.
Published: April 2021

Water covered close to 70% of the Earth’s surface; however, it is a struggle to access 3% of it as freshwater, suitable for human intake. The shortage of water has become a global issue due to climate change, pollution and the demand of growing freshwater. The fabrication of high performance and antifouling nanofiltration membranes are of utmost importance as a result of their capability of treating contaminated water and to also regulate the quality of freshwater. However, there is need for improvement in the fabrication of membrane using different nanofillers to produce mixed matrix membranes (MMMs). Mixed matrix nanofiltration membranes with nanofillers were reviewed for different applications.
Advances in Concepts of Ergonomics with Recent Industrial Revolution
Authors: Fayomi O.S.I. , Akande I.G. , Essien V. , Asaolu A. , Esse U.C.
Published: April 2021

Change is constant and as such we must always look forward to ways to help us adapt to this changes. With constant improvement being revised on evolving better and improved ways in which individuals and workers can function in their various organizations and industries, better and improved methods would have to be constantly developed in order to gain maximum efficiency from workers. The emergence of the Industry 4.0 industrial stage era has witnessed with its arrival tremendous industrial performance. This paper seeks to provide a review on the various advances of ergonomics concepts with the advancing industrial revolution with supporting roles on importance of training workers on the new innovative techniques.
Effect of Heat Treatment on Micro Hardness and Microstructural Properties of Al 6063 Alloy Reinforced with Silver Nanoparticles (AgNps)
Authors: Azeez T.M. , Mudashiru L.O. , Adeleke A.A. , Ikubanni P.P. , Agboola O.O. , Adesina O.S.
Published: April 2021

The demand for light weight metals in engineering design has led to the increasing use of aluminum and its alloys. However, conventional high-strength casting aluminum alloys usually exhibit low ductility and toughness, as a result of boundary segregation and coarse dendritic grains which result in its limited application in large-sized and complex shaped work pieces. Also, the possession of a significant low resistance to corrosion of Al 6063 alloys has been a major challenge in applications involving acidic and alkaline media. In this study, silver nano-particle was extracted from a fixer solution. Al 6063 was impregnated with silver Nano-particle at different percentage ratio to form a metal matrix nano composite and the Hardening heat treatment of the reinforced metal matrix nano composite was performed. The elemental composition of Al 6063 prepared from scrap was determined using Light Emission Polyvac Spectrometer. The hardness and microstructural analyses of the composites were evaluated. The micro hardness of the composites was positively influenced by the addition of AgNps and the hardening heat treatment process it was subjected to. The percentage increase in micro hardness of the sample not heat treated but impregnated with 3% and 9% weight nano particles are 20% and 22% respectively. Subjecting these samples to heat treatment further increased the micro hardness to 33% and 37% respectively. The morphology of the composites revealed reasonably homogenous distribution of the reinforcement in the matrix of Al 6063 alloy. It can be concluded that both percentage increase in weight fraction of AgNps and hardening has significantly increased the micro hardness and refined the grain morphology of the Al-AgNps composites.
Gas Turbine Performance Forecast and Assessment: GE LM2500 in Outlook
Authors: El-Suleiman A. , Samuel O.D. , Amosun S.T. , Emovon I. , Ashiedu F. I. , Fayomi O.S.I. , Layeni A. , Nwaokocha C.N. , Afolalu S.A.
Published: April 2021

The generation of electric power is presently dominated by gas turbine (GT) power plants in Nigeria, as is the drift globally. This is due to gas turbine low carbon footprint, high power to weight ratio, and high efficient energy utilization in combined cycle configuration. The gas turbine operates off-design on leaving the manufacturer’s shelf. The information on gas turbine performance is relevant for the effective operation and maintenance of these plants. Design focus and performance off-design of the GE LM2500 turbine established in Cranfield University, UK, was undertaken to assess the effect of the imposed ambient situation on the GT routine factors such as power output, fuel flow, and mass flow. The results obtained indicate that the accessible GT power and efficiency are vastly penalized by an adverse ambient condition in addition to other factors relative to its design point. Such conditions are predominant in the tropics where Nigeria falls, with the obvious consequence that the user must give careful thought to site-specific operating conditions before the procurement.
Performance Characteristics of Unsaturated Polyester Reinforced with High Frequency Microwave Treated Natural Fibre
Authors: Imoisili Patrick Ehi , Jen Tien-Chien
Published: April 2021

Using the most environmentally sustainable agro-waste fibers as reinforcement has opened up a new direction for polymer composite research. Research has recommended that altering of fibre surface by both chemical and physical means, increases the performance characteristic of natural fibre/polymer matrix. In this study, high-frequency microwave irradiation at a frequency of 2.45 GHZ and 550W power was used to treat natural fibre extracted from plantain (Musa paradisiacal) pseudo steam. Microwave modified and untreated plantain fibre was used to fabricate a biocomposite using polyester resin as polymer matrix, by means of hand lay-up and compression moulding technique. Results reveal an increase in mechanical strength of the modified fibre reinforced bio-composites at optimised conditions, thus creating opportunities and consistency to be use in technological and structural applications.
Design of a Biomass Combustion System and Experimental Testing of a Thermoelectric Generator
Authors: Onoroh F. , Ogbonnaya M. , Onochie U. P. , Echeta C. B.
Published: April 2021

This research is geared towards the design and testing of a biomass powered thermoelectric generator for household electrical appliances. Sensibility analysis and construction of the thermoelectric generator were carried out. The setup consists of biomass burner, thermoelectric generator, battery, MTM-380SD three channel temperature logger and voltmeter. A maximum voltage of 24V was generated with ten thermoelectric modules containing one thousand two hundred and sixty thermocouple junctions. Analysis of the burner shows that at 30% excess air, there is 15% reduction in SO2 formed compared to stoichiometric and 4.85% O2 appeared in the products, further reduction of SO2 by 28.5% occurred for 50% excess air and 44.3% increase in O2 formed compared to stoichiometric. The results obtained shows biomass powered thermoelectric generation is an excellent solution to power generation issues in rural areas as it uses renewable source of energy which is environmentally friendly.
Potency of the Leaf, Stem and Root Extracts of Petiveria alliacea Against Selected Microorganisms
Authors: Olomieja A. O. , Olanrewaju I.O. , Ayo-Ajayi J.I. , Jolayemi G. E. , Daniel U.O. , Mordi R. C.
Published: April 2021

Infectious diseases have contributed immensely to the rate of death globally in the past decades due to increased resistance to synthetic drugs. Hence, there is an urgent need to find a lasting solution to the problem of drug resistance, through the emergence of alternative medicine. One of such plant with biologically – active components against variety of diseases is Petiveria alliacea. It has been used to reduce inflammations and pains and also to eliminate bacteria, fungi, candida and viruses. The potency of the oils obtained from the leaves, stems and roots of this plant through (Soxhlet and Cold extraction methods) were subjected to test against certain micro-organisms, such as: Staphylococcus aureus, Bacillus subtilis, Escherichia coli, as well as the anti-fungi test on Rhizopus sp., and Aspergillus niger. The cold hexane leaf extract and cold ethanol leaf extract were most effective at limiting the growth of Salmonella typhi and the Rhizopus sp. respectively with an MIC value of 3.125 μg/mL and MBC value of 6.25 μg/mL. The ethanol leaf extracts using Soxhlet technique were most effective at MIC value of 3.125 μg/mL on Staphylococcus aureus, Escherichia coli, Rhizopus sp., and Aspergillus niger. The ethanol leaf extracts using Soxhlet extraction technique were most effective at MIC value of 3.125 μg/mL on Staphylococcus aureus, Escherichia coli. Likewise, the hexane and ethanol cold leaf extracts were most effective in limiting the growth of Rhizopus sp. and Aspergillus niger with MIC value of 3.125 μg/mL and minimum fungicidal concentration (MFC) value of 6.25 μg/mL. The antioxidant property of the extracts was determined by 2,2-diphenyl-1-picrylhydrazyl radical scavenging assay with ascorbic acid as the reference standard.
An Overview of Microkernel Based Operating Systems
Authors: Isaac Odun-Ayo , Okokpujie Kennedy , Akinwumi Hannah , Juwe Jesse , Otunuya Henry , Alagbe Oladapo
Published: April 2021

The creation of Operating Systems (OSs) with Microkernels was in response to the various challenges presented by Operating Systems with Monolithic kernels. Microkernel based Operating Systems provides security and flexibility in the system. This paper reviews seven different microkernel-based Operating Systems: L4, GNU Hurd, Genode, L4re, NOVA, seL4, and Muen Separation Kernel. This analysis provides an understanding of the various trends in the Microkernel Based Operating Systems design. Research papers and official documentation of the individual microkernels served as data sources. The result in this paper shows that there has not been a significant variation in the underlying principle of minimality and how Microkernel Operating Systems approach the implementations of their inter-process communication (IPC), memory management, and scheduling.
Study of the Effects of Waste Glass Additives on the Properties and Compliance level of Fired Ceramic Masonry Bricks
Authors: Akinwade A. A. , Adediran A.A. , Balogun O.A. , Abel B.A. , Daniel T.P. , Kazeem R.A. , Olayanju T.M.A.
Published: April 2021

The current study reports the effects of waste glass additives on the properties and compliance level of fired ceramic masonry bricks. In the course of producing durable bricks for masonry, waste glass powder sieved to 150 μm was added to clay, mixed with water and fired to 1000°C. The effects of the waste glass addition were investigated by subjecting 242 ceramic bricks produced to physical, mechanical, and thermal tests. Their morphological behaviour was thereafter examined. From the results obtained, the physical and mechanical properties were improved as waste glass content increased in the samples. Values of properties obtained were compared with existing standard values for bricks and it was observed that compliance level at 0% waste glass was 63%, at 10% waste glass addition, it was 75% and at 15% to 40% waste glass addition, compliance was 100%. Therefore, it was concluded that waste glass addition to bricks improved the properties of bricks for construction purpose.
Modelling and simulation of the volume flow of NH3, K2CO3 and MEA for the Carbon dioxide absorption from coal
Authors: Nkhwashu M.I. , Moropeng M.L. , Agboola O. , Mavhungu A. , Moropeng R.C. , Fayomi O.S.I.
Published: April 2021

Computational models have been developed and solved by the use of a computer coded software Python on Spyder console. The models were developed to gain an improved insight of carbon dioxide capture process performance by concentrating on the volume flowrate of the flue gas. The models were based on chemical absorption method. The study was aimed at exploring the absorption capacity of monoethanolamine (MEA), chilled ammonia and potassium carbonate (K2CO3) systems by concentrating on the movement of flue gas volume. The profiling of volume was prepared in order to see how much of the flue gas will be lost at the end of absorption when the three mentioned absorbent are used to capture carbon dioxide (CO2). The results showed that high volume flow of the gaseous phase has led to poor absorption, whilst low volume flow yields higher CO2 absorption. Moreover, in comparison to K2CO3 and chilled ammonia, the MEA was found to have the best absorption capacity.
Comparative Study of Operating System Quality Attributes
Authors: Odun-Ayo Isaac , Okokpujie Kennedy , Oputa Kingsley , Ogbu Henry , Emmanuel Franklin , Shofadekan Ayobami , Okuazun Gideon
Published: April 2021

An Operating System is an interface between a user and computer hardware. It’s a piece of software that handles hardware devices and acts as a bridge between an application software and hardware of the computer. Everything the user does is done in the user mode and what the system does is done in the kernel mode. The kernel is a computer program at the heart of the operating system, with absolute control of everything. Operating system concepts have been developed by many manufacturers over the years and a few quality ones to match with user demand and preferences. This paper helps compare operating systems by their quality attributes and using four of the most influential operating systems – Windows, Linux, Mac and Android OS, along with other technical details in assuring user guide when deciding what operating system to choose based on their requirements. The research uses factor analysis to obtain aggregate score based on selection criteria, with first choice at 50%, second choice at 42%, third choice at 6%, fourth choice at 2%. Windows 10 has highest GUI, Hardware Compatibility, Portability and Process Management features. Also it has high Memory Management, Text Mode Interface and file system features. However, Security feature on Windows 10 was least only 2% as fourth choice. Mac OS X has high percentage for Memory Management, GUI, Security and Architecture features. However, Hardware compatibility, Text Mode Interface, File System and Portability features was least only 2% as fourth choice. Linux Ubuntu 17.4 has highest Security, Text Mode Interface, Architecture and File System features. Also having high Portability and Process Management features. However, GUI and Memory Management was least only 2% as fourth choice. It was observed for latest version of operating system all have quality attributes but selecting most preferred choice of operating system would require proper analysis of the user. Windows with a percentage of 37% was first choice, followed by Linux having 33%, Mac with 23% and finally Android with the lowest score of 7%.
Gravimetric (Corrosion) Study of Carbonaceous Agro-Waste Inhibitor on the Al-Fe-Si alloy (AA8011) in aggressive Nitric (NO3
-) Environment
Authors: Fayomi J. , Bitire S.O , Popoola A.P.I. , Fayomi O.S.I.
Published: April 2021

The inhibition potential and adsorption properties of agro-waste eggshell (EGS) product on Al-Fe-Si alloy in 0.5 M HNO3 was examined in this novel work. The gravimetric weight-loss measurement was utilized to check the rate of corrosion attack in reference to the time of immersion and the potency of the EGS inhibitor. In this work, the mechanism of the inhibitor adsorption on the AA8011 alloy surface was as well checked to understand the degree of the adherence of the adsorbate to the surface of the metal. The results of the weight loss analysis revealed a reduction in the weight loss and the rate of corrosion in the presence of the green inhibitor. The efficiency of the EGS inhibitor increases with percentage rise in EGS content but decline with time progression, however, the 2 g EGS content maintains good efficiency of about 71.591% at the end of 168 hours. The best regression coefficient of R2 = 0.99088 was achieved from the Langmuir isotherm model and physical adsorption was confirmed from the evaluation of the adsorption free energy (ΔG°ads).
Electrochemical Corrosion Phenomenon and Prospect of Materials Selection in Curtailing the Challenges
Authors: Akpoborie J. , Fayomi O.S.I. , Agboola O. , Samuel O.D. , Oreko B.U. , Ayoola A.A
Published: April 2021

Corrosion evolution over time has caused severe damage to life; affects the economic, environmental, and mechanical aspects of materials services. Corrosion is an electrochemical reaction; it is a reaction that involves the movement of electrons from one place to another. Electrochemical reactions include both oxidation and reduction reactions; oxidation reactions increase the valence number of material by removing particles from the material, making it positively charged. In other ways, technological advancement has provided several attempts to understand this catastrophe, providing consistent mitigating measures and control toward attaining less cost. This overview study the electrochemical corrosion phenomena and the prospect of materials selection in curtailing the ranging challenges.
DNA as an Inhibitor for Corrosion Mitigation of Metallic Materials
Authors: Elewa R. , Fayomi O.S.I. , Joseph O.O.
Published: April 2021

Recently, the widespread of the applications of metallic materials in various spheres and fields or discipline in material science and engineering cannot be overemphasized. Alongside this great progression in the adoption of these material for use, the corrosion problems associated with these metals are also gradually becoming alarming which has birthed a call to action for immediate and sustainable efforts to salvage the problem. Several inhibitors have been developed in a bid to mitigate this corrosive ordeal facing a lot of industries, but inorganic inhibitors have some vital some shortcomings in form of poisonous substances which on the long run affects the surrounding. The pitfalls from non-organic inhibitors poised the drive of other researchers to develop a better, non-poisonous and organic inhibitive substances like Deoxyribonucleic Acid (DNA) that will mitigate corrosion without any negative residual effect on either the metallic materials or the environment. The DNA corrosion inhibitors have very good potential and economic owing to the source of extraction which is plant and animal waste which is in line with wealth generation prospect from waste product.
Review of electrodeposition perspectives towards anticorrosion mitigation of mild steel
Authors: Ajayi-Majebi J. , Abioye O.P , Fayomi O.S.I. , Inegbenebor A.O.
Published: April 2021

The study of corrosion is vital to reducing the overhead costs in the manufacturing industries. However, finding suitable application methods for prevention is a concern due to manufacturer specification and resource investment procedure. The coating is recognized as one of the foremost ways of applying resistance to corrosion damage. Electrodeposition is a unique technology because of its fine control of the chemical properties, mechanical strengthening behavior, and structural evolution over time. Thus, these overview studies discuss the possible protective coatings, corrosion as a major problem and its protection methods, electrodeposition process, and inherent characteristics. It intricacy of mild steel structural responses and its efficacy was also established.
A Review on Steel Connections and Structural Behavior
Authors: Oluwafemi J.O. , Ofuyatan O.M , Ede A.N , Oyebisi S.O , Bankole D.T , Babaremu K.O
Published: April 2021

The demand for the use of steel in the construction industry has been on the increase over the years due to its several advantages over several other construction materials. Some of these advantages are light weight, ease of constructability and durability. In the constructability of a steel structure, the three major connection types that have been used in steel structure construction are the riveted connection, bolted connection and the welded connection and the type of connection employed in a steel structure has been seen to have a great influence on the steel structural behavior and the condition for operation. Hence, the condition of service and acceptable behavior of steel structure should guide the choice of connection to be employed in any steel structure. To this end, this paper reviews connections types and the structural behavior.
Estimation of EMF Parameters From Distrbution Transformers and Their Impacts on Selected Health Indicators of Building Residents: Case Study of Ejigbo Environs, Isolo, Lagos State, Nigeria
Authors: Adekunle A. , Ugonna M.C , Olaifa O.A , Olumide Omojola O.
Published: April 2021

This research work is directed at studying the consequences of exposing industrial building inhabitants to electromagnetic radiation from distribution transformers. The study considered 310 participants with 124 men and 186 women, with age range between 5 and 70 years old. This research was carried out in ten industrial buildings in Isolo, Lagos State. Measurement of health parameters were taken before and after participants were exposed to electromagnetic radiations. The health parameters considered are: Ear temperature, blood oxygen saturation, heart pulse rate, arterial blood pressure (diastolic and systolic), echocardiography, complete blood count and colonoscopy. Radiation tests were conducted on the people thrice (9:30 – 10:30) a.m. and (3:30 – 4:30) p.m. before and after exposure to radiation. These measurements were recorded inside the buildings considered. The radiation parameters considered are: Power density, electric flux density, electric field, magnetic field strength and magnetic flux density. Housessories limited recorded the highest power flux density (0.89 μW/m2) while Top highflyer secondary school the lowest (0.368 μW/m2). The high magnitude obtained for Housessories is due to the fact that it was located just 8m from the transformer while the Top highflyer secondary school was located at a distance of 140m from the considered transformer. The results also indicate that the estimated values of power flux density were within minor risk limit 0.1 μW/m2- 10 μW/m2. The effect of electromagnetic radiation on participant’s health resulted in increased ear temperature, heart pulse rate, arterial blood pressure (systolic and diastolic) while blood oxygen saturation and echocardiography were decreased. Complete blood count and colonoscopy produced no reactions. The female employees compared to their male counterparts experienced more health hazards.
Modelling and simulation of motor vehicle suspension system
Authors: Emagbetere Eyere , Oghenekovwo Peter A. , Obinabo Christabel C. , Aworinde Abraham K. , Ishola Felix A. , Kilanko O.
Published: April 2021

In this work, using a quarter-car model was adopted, the equations of motion were derived for a passive and then the sky-hook semi-active suspension systems. The derived differential equations, solved using the Dormand-Prince pair numerical formula, was then used to simulate values of displacements as affected by damping coefficients and the sky-hook constant. The simulated results showed that the maximum amplitude of the sprung mass, which is linked to ride discomfort, increases while those of unsprung masses, which affects the road holding ability, decreases with increasing depth of pothole. Furthermore, displacements for both sprung and unsprung masses varied directly with damping coefficient. Finally, as the sky-hook constant of the semi active system model increases, values of amplitudes of unsprung masses decreases while those of sprung masses increases. It was, thus, shown that the vertical displacements of vehicle bodies and wheels are dependent on the depth of potholes, damping coefficient and sky-hook constant, and that the sky-hook semi-active suspension system model gave a better result compared to the passive suspension system. Therefore, by applying the sky-hook control principle, the desired road comfort of passengers can be achieved as well as reduced rate of car damage and cost of maintenance.