bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of magneto-optic characterization properties of vegetable oil using Faraday rotation method based on microcontroller
Authors: Sulasno M S , Sudarmaji A
Published: April 2021

The research aimed to design and create Faraday’s rotation system as a tool to characterize the magneto-optic properties of vegetable oil. The measured magnitude were the intensity of light, the magnitude of the magnetic field, and the change in the rotation angle of polarization. Measurement of light intensity was carried out using BH1750 as a light sensor, magnetic field measurement was carried out using Gauss meter. Changes in the rotation angle of polarization were made by the stepper motor which drove the lens of the analyzer which had been geared. The light source used was an RGB laser with a power 300mW. Data were collected by the initial condition of the angle between polarizer and analyzer lens at 45°. It can be concluded that Faraday rotation experiment is affected by heat produced by the solenoid and olive oil has magneto-optic property.
Tallinn manual: Cyber warfare in Indonesian regulation
Authors: Pratama B , Bamatraf M
Published: April 2021

Advances in communication information technology have made various infrastructures dependent on cybernetics technology. However, there are threats to the system. One of the threats discussed in the context of the study of international humanitarian law is cybernetics war, which is carried out by high entities such as the state. The threat is coordinated with the armed forces or military in order to gain an advantage over the opponent. Recognizing that there are ever-evolving and very dynamic threats to the sovereignty of the state and nation, in this case by considering advances in internet technology, the government has formulated regulations regarding cyber defence as an effort to overcome cyberattacks that cause disruption to the implementation of national defence, so that it can realized cyber defence (cyber defence). In general, there have been a number of national laws and regulations governing matters relating to activities in cyberspace. The research method of the paper used normative legal research to collect and analyse legal material regarding two main concepts, namely: cyber warfare regulations and information regulations. The nature of legal research was to provide prescription on legal concept or legal phenomenon. The paper finds out that Tallinn Manual is a legal concept that give an instruction to respond cyber-attack, in which the concept can be adopted. In the meantime, in legal vacuum of cyber warfare regulation, the concept inside Tallinn Manual can be interpret to the existing law in Indonesia. Findings in the paper indicates that cyber-attack according to existing regulation can be classified into three categories, namely: ordinary attack, middle attack or terrorism, and massif attack or cyber warfare.
The influence of entrepreneurship orientation and IOT capabilities to sustainable competitive advantage of artisanal fisheries in Indonesia: A case study of Artisanal Fishery in Banten Province
Authors: Barlian E , Mursitama T , Elidjen  , Pradipto Y D , Buana Y
Published: April 2021

Sustainable competitive advantage as the way of winning the dynamic competition consists of many factors that influence the success of its implementation. A quantitative research method was applied to fill the gap of the technology capabilities and entrepreneurship orientation as important factors that influence the sustainable competitive advantage. The research surveyed 106 small scale fishermen to find out how artisanal fishermen as entrepreneur in catch fisheries perceived digital transformation and sustainable competitive advantage The unique proposition of the research was to find how the artisanal fishermen at the province of Banten, Indonesia perceived the Internet of Things Capability (IOT-Capability) or also known as digital transformation supports the sustainable competitive advantage practices in catch fisheries. The results of this research indicate that IOT technology highly influences the sustainable and competitive advantage of the fishery industry. The research finds out that small scale fisher as an entrepreneur believes that entrepreneurship orientation of artisanal fisher positively influences IOT-capabilities and makes it as mediation variable between the fisherman entrepreneurship orientation and sustainable competitive advantage.
Design of tourism application for Morotai island
Authors: Thaib F , Bima A C A , Suyoto
Published: April 2021

Morotai Island Regency is one of the new districts located in the eastern tip of North Maluku Province, Northern Indonesia. Morotai Island has several beautiful tourist spots that attracts the attention of foreign and local tourists to visit the places. The aim of the research was to discuss the use of internet technology as a medium for the introduction of Morotai Island tourism. The research intended to make a mobile application for tour packages and location-based services (LBS) so that it could find out routes and locations to destinations easily and quickly. The mobile application used some media or storage assistance in MySQL for databases on the Web server. The search application also had the main feature that could find the easiest and closest destination location based on where the user’s location was located just by utilising GPS technology. The results of the research present a geographic information system (GIS) or application for Morotai Island tourist destinations and show that this information media is feasible. The app is for tourists to know and find the location of attractions easily and quickly.
Green manufacturing literature during three decades: A scientometric approach
Authors: Purnomo A , Septianto A , Rosyidah E , Khan H A U , Purnama P A
Published: April 2021

The research aimed to map the global green manufacturing academic literature indexed by Scopus by using a scientometric approach and analysis was done by using the analysis search results service from Scopus and the VOSviewer application. The research data consisted of 1,386 academic literature published from 1993 to 2019 were obtained from the Scopus database. The results show that the most productive countries, research institutions, and individual researchers in green manufacturing literature were China; Chongqing University; and Liu, F. The most intensive subject areas and sources of publications in green manufacturing literature are engineering and the Applied Mechanics and Materials. There are six collaborative researchers’ group patterns. The research proposes a convergence axis classification consisting of green manufacturing literature to characterize the body of knowledge generated from three decades of publications: machining, environment, sustainable development, energy, manufacture, computer science, and tools.
Revitalization of Kerta Niaga Kota Tua building in Jakarta as a boutique hotel
Authors: Rahmayanti K , Rachmayanti I , Wulandari A A A
Published: April 2021

Kota Tua Jakarta is a Dutch colonial heritage that has to be a part of tourism in Jakarta with Dutch architecture characteristics. It has been protected in Ali Sadikin’s government era in 1972. However, many buildings were abandoned and recently held a revitalization after Basuki Tjahaya Purnama’s government era in 2016. This research aimed to give the insight to revitalize old buildings in this area, and one of them was the Kerta Niaga boutique hotel. This research was a qualitative method by using primary data and secondary data. It finds that the revitalization of the Kerta Niaga Boutique Hotel is by planning adaptive re-use with the additional public facility of the coffee shop. It aims to attract tourists to Kota Tua, and to re-introduce Batavia’s ambiance through the Hotel’s interior design.
Design of furniture and accessories interior in microcinema in Jakarta
Authors: Prayuzan J A , Pratama A F , Hartanti G
Published: April 2021

This research aimed to provide furniture and accessories that support the community and the film community to create a better social container and created community interest in searching for alternative means of microcinema. It is because of the growth of public interest for microcinema present to provide an alternative facility for people to get a more varied selection of films. Besides providing an alternative meant to watch movies, microcinema was used as a container for film production to reveal their existence to the public. However, there were many more that have not been known by the public audiences, but they could be a means for education and provided a new atmosphere for them to watch movies. The research used qualitative research by doing literature studies, observation, interviews, surveys, and field research. The results achieved from this stretch are the design for other supporting mediums and media according to the needs at the time of the film and microcinema characteristics. Besides, the election material is calculated to be a solution and not apart from the concept associated with the microcinema.
Interior design of youth community creative hub in Jakarta
Authors: Vania L , Wulandari A A A , Rachmayanti I
Published: April 2021

This research aimed to design a creative center that was used as a place for the creative community. Creative hub had recently gained more interest in Indonesia due to the growth of the creative community, which was supported by culture, technology, social, and business segment. This research was conducted using two different methods. The first method was to use primary data consisting of interviews, field observations, and documentation. The second method was to use secondary data through literature and reference studies. From the data collected through these two methods, the researcher finds an analysis of the needs of the creative center and later finds schematic design in the form of conceptualization, alternative layouts, the initial description of the design, initial sketches, and mock studies. From this concept, it is hoped that the Creative Center for the Youth Community can be used as a place to look for creative ideas, express knowledge, and develop existing ideas. This creative concept is applied to the use of colors that can stimulate creativity, such as yellow, green, and orange, and the colors will be applied through bright lighting.
Interior design of Indonesia tale museum
Authors: Almiranti S , Rachmayanti I , Wulandari A A A
Published: April 2021

This research aimed to introduce the Tale Museum to improve the attraction of Indonesian tales in the eyes of Indonesian children. As an archipelago country, Indonesia had various tales from each region that was known had high culture and moral values in it. In the middle of the rapid globalization, the Indonesian tale losing its popularity compared to the foreign tale. This research was conducted to add data needed to support design. It was conducted with qualitative methods that produce descriptive and analytical data. The data generated consisted of two types of data, namely primary data and secondary data. It is found that the museum is designed according to the story that displays the interactive concept and using the latest technology. This new design provides a new experience for visitors to enjoy Indonesian tales without reducing the value contained in the tales.
Preparing post Covid-19 pandemic office design as the new concept of sustainability design
Authors: Nediari A , Roesli C , Simanjuntak P M
Published: April 2021

The Covid-19 pandemic has affected human behavior. It brings changes in many aspects of life that staying at home becomes a new normal. People do physical distancing to stay safe and healthy. Employees work from home to remain productive as professional responsibilities to the company. Sustainable design has been a trend in office design. The basic idea of sustainability is to reduce the negative impact on environment and health by creating a design that empathizes with its surroundings. When physical distancing is applied in layout furniture, it reshapes the office design. This topic is interesting to discuss since companies consider to increase hygiene standards while designers prepare the new concept for office design in the post Covid-19. The collected data contained information that needs to be considered in developing the interior for a workspace. The data obtained were from various sources related to this Covid-19 pandemic. This research was conducted through descriptive research, in which the collected data described the phenomenon studied around the world and how designers prepared for the new normal for office design. Based on the study, it is expected to determine the new working standards for office design and explain them to interior design students as the course material in interior design subject in designing for public space.
Towards a common goal for a sustainable tourism destination: Case study of Biak Numfor, Papua, Indonesia
Authors: Kusumawardhana I , Lemy D M , Nathalia T C , Kristiana Y
Published: April 2021

This paper examines stakeholders’ perceptions of sustainability in Biak Numfor, Papua, Indonesia. The study reviews opinions of site-specific sustainability aspects and assesses their perceptions of sustainability against a common goal of the Global Sustainability Tourism Council (GSTC). Meanwhile, a tourism destination is aware and takes full account of sustainability tourism for its current and future thinking towards economic, social and environmental impact, the industry, the environment and host community, and addressing visitor needs. However, few structures of the criteria towards a common goal for GSTC destination criteria are still undermined. Qualitative research is carried out by performing a stakeholders’ Focus Group Discussion (FGD) in Biak Numfor, Papua. Systematic approaches and thematic analysis are conducted to reveal the four critical awareness of sustainability issues. In the long course, this awareness may lead to changes in tourism sustainable development preferences such as accessibility, infrastructures and destination management, and planning (destination promotion; inspirational leaders; and community awareness).
The impact of IFRS adoption on value relevance accounting information: Evidence from Indonesia
Authors: Sun Y , Sari N , Havidz S A H
Published: April 2021

The research objective is to examine the value relevance of accounting information during pre and post IFRS adoption of the banking industry in Indonesia. It utilizes an empirical analysis with panel data of 22 banks with a time period of 2 years before IFRS adoption and 4 years after the adoption. Ohlson’s price model has been deployed to conduct the analysis. Results reveal that the value relevance on earnings increase after the IFRS adoption.
Framing COVID-19 by an anglophone newspaper outlet
Authors: Prihatini E , Halimatusa’diyah I
Published: April 2021

Studies on media coverage and pandemics predominantly focus on the global North. Little is known about how the media in a global South setting is reporting the development of such a global crisis as it evolves. This paper aims to fill the gap by observing an Indonesian anglophone newspaper outlet, The Jakarta Post. Using lexical and statistical analysis on 539 articles, the current study finds the focus of the coverage has been on how the government is managing the crisis. The framing by The Jakarta Post re-emphasises the very nature of the Indonesian economy, which is heavily relying on the informal sector, thus, making the decision to apply a full lockdown rather dilemmatic. The national-local political dynamics are also at play as it shapes the communication of crisis management in Indonesia.
5S towards sustainable competitive advantage in franchise retail business
Authors: Astuty E , Sinaga A
Published: April 2021

This study aims to find empirical evidence in filling the “how-to” gap of a service company in order to have a sustainable competitive advantage by adopting lean system or known as a workplace organization. This study surveyed 150 customers from three largest franchise minimarts in Bandung City in order to determine the characteristics and interrelations that occur in the three research objects observed, namely 5S or workplace organization, service’s waste, and service quality. The method used is descriptive method and structural equation modeling based on the least squares method or PLS-SEM. The statistical tools used are SPSS20 and SmartPLS3. The results reveals that the three largest franchise minimarts in Bandung City, had a high level of service quality, low service’s waste, and well-managed workplace organization. The relationship between them shows that the three franchise minimarts continue to survive and continue to grow after operating for more than 3 decades, because they implemented a workplace organization (5S, seiri-seiton-seiso-seiketsu-shitsuke), so that this can reduce the occurrence of service’s waste by 82.4 %, where even this has an impact on increasing service quality by 27.9% with a very high model strength of 73.5%.
Employee productivity: The effect of flexible work arrangement, indoor air quality, location and amenities at one of multinational logistics providers in Indonesia
Authors: Irawan D A , Sari P
Published: April 2021

This research aims to know the effect of flexible work arrangement, indoor air quality, location and amenities towards employee productivity. This study is an associative quantitative research. The data were collected using questionnaires. The population of this research was 200 head office employees of PT XYZ in Jakarta, Indonesia. To select the sampling size, simple random sampling technique using Slovin formula was used. 67 sample was used based on the Slovin formula calculation. Multiple linear regression analysis using SPSS software was used to analyze the data. The results of this research show that there is significant effect of flexible work arrangement, indoor air quality, location and amenities towards employee productivity. However, flexible work arrangement has no significant effect towards employee productivity. Meanwhile indoor air quality, location and amenities have significant effect towards employee productivity.
Service innovation and its impact on firm performance: A systematic literature review
Authors: Noerlina  , Alamsjah F , Mursitama T N
Published: April 2021

This research aims to identify the literature about service innovation and its impact to firm performance publication. From Elsevier’s Scopus, the largest abstract and citation database of peer-reviewed literature, there were identified 63 publication in a variety of document type that publish service innovation research. This study provides information on how the world’s service innovation topics have been developed over the past 5 years. The study also identified country that first focused on the research on the topic of service innovation and the performance of the company. Identification of the publication is using the keywords service innovation and firm Performance. Once the data is obtained, the next stage is grouping according to the year of publication. After that, it is grouped again by country based on affiliates of the author. The analysis is also conducted on the author with the most publications and compares to the country’s data with the highest publications. the topic of service innovation become a topic that attracts the attention of researchers. The result shows that the increase in research in this field began in 2017 until now, with the most productive publication in this topic come from Taiwan. From author productivity, the author with the most publications is actually from South Korea.
Visual communication design: Poster as an important way to encourage social distance in Jakarta when the epidemic 19
Authors: Utoyo A W , Aprilia H D , Kuntjoro-Jakti R A D R I , Kurniawan A
Published: April 2021

Health campaigns especially regarding the COVID-19 epidemic need to be highlighted as dangerous viruses that cause fever, coughing, shortness of breath, chest pain and death. The health ministry wants the government to move public awareness in this direction. The research aims to examine the visual communication of a poster design to encourage social distancing due to the pandemic of COVID-19. This study has analyzed the key elements of health campaign posters in Jakarta. The poster remains becoming an active platform to inform display information, data, schedules or offers and to persuade people, causes, places, events, products, companies, services, groups or organizations in Jakarta. Previously the health poster campaign was not enough to attract parents’ attention to educate their children about having a healthy lifestyle. This study uses a qualitative approach to collect all the data needed. This includes case studies through visual analysis of local content and national poster design from a health campaign from the Jakarta health ministry. The results show that local and national poster designs have different elements of the design results that affect different posters. This result can be set as a guideline for the government in Jakarta to design a poster with good design aesthetic elements. It will also guide future graphic designers to improve the ability of their poster campaign.
Society 5.0 publication mapping using a scientometric perspective
Authors: Purnomo A , Asitah N , Latukismo T H , Rosyidah E , Kurniawan B K
Published: April 2021

Society 5.0 initiated by the Japanese nation seeks to enhance the standard of living of the society with an IoT-based smart society and an entrepreneurial spirit. This research aims to study the map of international publications in the field of Society 5.0 using a scientometrics perspective. The research conducts a scientometrics method and analyzed research data using the analyze search results service from Scopus and the VOSviewer application. Research data on 57 academic documents published from 2017 to 2019 obtained from the Scopus database. The results show an increase in the number of international publications in Society 5.0 each year. However, there were no research institutions and individual researchers with the most publications in the field of Society 5.0. The most countries, subject areas, and type documents in Society 5.0 publications were Japan, computer science, and article. There was one collaborative pattern of researchers in the field of Society 5.0. This study proposes a convergence axis classification consisting of society 5.0 publications to characterize the body of knowledge generated from three years of publications: computer science, society, economics, industry, technology, and IoT.
Harmonic Analyses of Periodic Milling Forces and Vibrations
Authors: Ozoegwu C. G. , Okokpujie I. P.
Published: April 2021

The milling process is a materials processing method of economic importance. This work discusses and illustrates the application of harmonic analysis in the modeling of cutting forces and periodic vibrations of the milling process. The interest in periodic forces and vibrations of the milling process is motivated by the fact that they are always present because of the inevitability of structural flexibility, unlike the regenerative forces and vibrations, which can be avoided. However, they are more destructive when they occur. These vibrations leave machined parts with vibration marks and form error compromising geometrical integrity. There is a pressing need to minimize or pre-empt the costly remedial finishing processes through modeling and simulation of the problem. Illustrations are presented for a cutting tool with uniform pitches and a cutting tool with non-uniform pitches. Simulations indicate the need to avoid spindle speeds corresponding to tool passing frequency because they induce destructive resonant conditions in milling processes.
Experimental investigation of noise footprints of gasoline-fueled backup generators
Authors: Giwa S. O. , Nwaokocha C.N. , Layeni A. T.
Published: April 2021

With the protracted and ever-increasing higher demand for electricity than the relatively constant supply in Nigeria, the provision of electricity has been epileptic in nature. This has led to the private and commercial generation of power for use through backup generators. The noise emanating from the operation of generators in the country has been of great concern as it is presently a social menace coupled with a negative impact on public health. The dearth of literature on generator-induced noise has ignited this study. The noise level of 96 household gasoline-fueled generators selected at random was measured using a noise meter. At 10 min interval for 1 h and a height of 1.5 m above the ground, the noise levels of the generators were measured. Data of the age, operating hours, efficiency, installed and operating capacity of the generators were also garnered. The work was carried out at Sango-Ota, Ogun State, Nigeria. The characteristics of the investigated generators were; age of 1 – 144 months, efficiency of 9.2% – 88%, operating hours of 1 – 15 h, installed capacity of 650 VA – 4200 VA, and estimated load of 250 W – 2300 W. Noise level range of 37.3 dB – 100.4 dB with an average of 64.0 dB ± 1.3% was obtained. In addition, the World Health Organization (WHO) recommendations of 45 dB (night) and 55 dB (day) for residential areas were found to be moderately lower than the average noise level measured in this work. Furthermore, only 15 (15.6%) and 2 (2.1%) generators out of 96 were noticed to comply with the WHO threshold values of 45 dB and 55 dB, respectively. These findings revealed the potential adverse effects of noise stemming from the operation of generators on the public wellbeing coupled with the associated health problems. The generators’ efficiency was noticed to have the most impact on the noise level with 26 (27.1%) of them having ⩾60% efficiency. This showed the inefficient use of generators as most of them with high installed capacity were used to power small electrical loads. Improving electricity supply, utilizing renewable energy, and adopting efficient noise control technologies were recommended as measures to reduce noise level via generators.
Aluminium Alloys as Advanced Materials: A short communication
Authors: Emmanuel A.O. , Fayomi O.S.I. , Akande I.G.
Published: April 2021

Aluminum alloys have been one of the primary structural materials for several years due to their common mechanical behavior, design, production processes, and inspection techniques. However, it has gained much fame and occurrence in automobiles manufacturers due to its low mass and resistance to deterioration. Wrought aluminium alloys, which happen to be part of its classes from the study, have shown to be an advanced material due to its excellent extrudability, good corrosion resistance, and high strength. In the improvement of 7000 series, Al-Zn alloys have higher strength relative to other classes of aluminium alloy. Minimizing the mass to volume ratio of materials is considered one way of reducing the weight of engineering materials, especially aircraft. This paper presents a brief study on aluminum alloys and their application as advanced material for production in vehicles and ship industry. This study showed that significant improvements in aluminum aerospace alloys are due to obtain quality equilibrium of properties.
Facile Extraction and Characterization of Silica Nanoparticles from Corn Stalk by Sol-Gel Hydrothermal Methods
Authors: Imoisili Patrick Ehi , Jen Tien-Chien
Published: April 2021

Lightweight aggregates, drug delivery and energy storage are some of the numerous applications of silica nanoparticles. Amorphous silica was extracted from corn stalk using the sol-gel hydrothermal method and nanostructured using Hexadecyl trimethyly ammonium bromide (CTAB) as template. The crystallographic structures of synthesized silica nanoparticles was characterized using X-Ray Diffraction (XRD). Functional groups was determine using fourier transform infrared (FT-IR) techniques, specific surface area was determine using the Brunauer Emmett Teller (BET) method. The presence of SiO2 was confirmed by Energy dispersive X-ray (EDX), surface morphology and particle size was examine using scanning electron microscope (SEM) and transition electron microscope (TEM). This study provide a silica nanoparticles sourced from agricultural biomass for cutting-edge applications including drug delivery.
Insider Threat Detection using Binary Classification Algorithms
Authors: Oladimeji Tolulope O. , Ayo C.K. , Adewumi S.E.
Published: April 2021

The Insider Threat Detection(ISTD), is commonly referred to as the silent killer of organizations. The impact is greatly felt because it is usually perpetrated by existing staff of the organization. This makes it very difficult to detect or can even go undetected. Several authors have researched into this problem but no best solution has been discovered. This study therefore considers the insider problem as a classification problem. It provides a lay man’s understanding of a typical classification problem as faced in the insider threat detection research scope. It then highlights five (5) commonly used binary classification algorithms, stating their strengths and weaknesses. This work will help researchers determine the appropriate algorithm to consider for the employee dataset available for classification.
Flame Behaviour Comparison of Building Ceiling Composite using Combustion Calorimeter
Authors: Dirisu J.O. , Fayomi OSI , Oyedepo S.O , Oyekunle J.A.O. , Asere A.A , Udoye N. E
Published: April 2021

This study determined the heat of combustion characteristics of selected building ceilings materials. The study was intending to appraise the flame affinity or retardance of building ceiling materials during combustion. Careful selection of ceiling composite was carried out in areas like Osun state, Ogun state, Lagos state, and Kaduna State. The heat of combustion was determined, having identified the heating value from the XRY-1C Oxygen Bomb Calorimeter. The heat flux and heat release rates were determined from the results of the combustion experiment. Based on the data obtained from the discrete experiments, the combustion integrity of the samples was appraised. Particleboard has the highest heat of combustion of 45.666J/kg, while asbestos failed to ignite. Other Polyvinyl chlorides (PVC) left ⩽ 0.0007kg of char after combustion and became deliquescent after long minutes of exposure to air. The heat release rate is highest with particleboard, 118.9219 J/s, and lowest with sample 7, 2.230 J/s. The study thus establishes that PVC is safer in terms of combustion properties compared to plant-based building ceilings. Asbestos has the overall most reliable properties, but for asbestosis, its use isn’t safe for use. It is necessary to develop building ceilings with flame retardant characteristics of asbestos as an alternative to it.
Experimental Investigation of TIG-welded AISI 1008 Carbon Steel
Authors: Abima C.S. , Akinlabi S.A. , Madushele N. , Fatoba O.S. , Akinlabi E.T.
Published: April 2021

Carbon steel is widely used in engineering applications due to its exceptional mechanical properties, and low cost. The fabrication technique employed to weld carbon steel plays a vital role in the final performance of the welded component when put into service. TIG welding is a generally accepted arc welding technique due to its ease and versatility coupled with its capacity to produce high-quality welds. It is the most desirable technique employed for welding plain carbon steel. This work aims to evaluate the influence of TIG welding process parameters on the mechanical and microstructural properties such as tensile strength, hardness, and microstructure of AISI 1008 carbon steel. The process parameters considered in this work were the TIG welding current, and gas flow rate. The tensile testing and the Vickers hardness testing have been carried out for the welded samples. The microstructural investigation was also carried out for the fusion zones (FZ) and the heat-affected zones (HAZ). The test results were analyzed, and emerging properties were compared for the various set of parameters. Welded specimen produced with 140 A, 15 L/mm had the highest hardness value. However, the highest average ultimate tensile strength of 432.89 MPA was produced from process parameters 180 A, 19 L/mm. Finer grain structures were seen in the fusion zones as compared to the heat-affected zones for all selected parameters.
Taguchi Optimization of Surface Roughness and Material Removal Rate in CNC Milling of Polypropylene + 5wt.% Quarry Dust Composites
Authors: Shagwira H. , Mbuya T. O. , Mwema F. M. , Herzog M. , Akinlabi E. T.
Published: April 2021

The Taguchi optimization technique was utilized to determine the optimal milling parameters that can be used in end face CNC milling operation of polypropylene+5wt.% quarry dust using high-speed steel (HSS) tool. Three milling input parameters i.e. the feed rate (f), the cutting speed of the spindle (N) and the depth of cut (dc) were optimized while considering the surface roughness (Ra) of the machined composite material and the material removal rate (MRR) during machining as the responses of the experimental design. From the results, the cutting speed (100 rpm) and the feed rate (120 mm/min) were the most important control parameters which greatly influence the surface roughness at 41.4% and 28.8% contribution respectively. In the case of the material removal rate, the depth of cut (0.8 mm) was the dominating factor at 98% contribution.
Chip Morphological Behaviour During Machining Of Ti-6Al-4V Using Refrigerated Soluble Oil
Authors: Ogedengbe T.S. , Abdulkareem S. , Afolalu S.A. , Ibitoye S.O.
Published: April 2021

Chips formed during machining are a vital instrument for the assessment both of machinability of material and the effectiveness of the machining method adopted. Various approaches have been proposed by researchers to make machining Ti-6Al-4V easier, ranging from reduction of cutting speed and feed rate to the use of coolant during machining. In this study, investigatation of the effect of refrigerated soluble oil on machinability of Ti-6Al-4V via monitoring of the chips formed during the various machining processes was carried out. The chips formed for various machining conditions were collected using a designed chip receptor medium and was analyzed using a metallographic microscope with an attached stylus. The experiment was planned using central composite designs (CCD) of the Response Surface Methodology (RSM) resulting in a 20 experimental run plan for dry and wet machining. Machining factors considered were cutting speed, feed rate, depth of cut and coolant temperature with corresponding values 40-120 m/min, 0.05-0.20 mm/rev, 0.2-1.0 mm and 5-11°C respectively. Responses monitored chip thickness, tooth profile and peak height. The effect of various factors on responses were discussed. Basically, results show that chip diameter increased with an increase in cutting speed. However, the sawtooth profile on chip reduced with an increase in cutting speed. It was therefore concluded that coolant temperature has an effect on chip morphology during machining of Ti-6Al-4V using refrigerated coolant.
Evaluating the Drying Characteristics of Paddy Rice Using Superheated Steam Dryer
Authors: Ojediran J.O , Adewumi A.D , Oladele S.O , Moses Olumuyiwa , Olayanju A , Okonkwo C
Published: April 2021

It has been recorded in literature that superheated steam has the ability to combine the parboiling operation (steaming and drying) of paddy (Oryza sativa - UPL1) rice into a single unit. According to literature, this process has not been fully explored and implemented in rice processing. In this research work, superheated steam dryer was used to parboil (steam and dry) paddy rice. Soaking time and temperature used was 12hours at 60°C, with steaming time ranging from 10 to 24mins, while the drying conditions used were; temperature (160, 170 and 180°C), bed depth (1, 3 and 5cm) and tempering time (20 and 40 minutes). In addition, paddy rice was dried from initial moisture content ranging from 26-43% (d.b) to a final moisture content of 2 – 8% (d.b). It was observed that the milled rice yield ranged from 71.32 to 94.5%, head rice yield ranged from 70.5 and 90.6%, broken rice ranged from 3.2 to 7.7%, chalkiness ranged from 3.4 to 10.6% and drying capacity ranged from 0.1 to 0.36kg/h. The results obtained shows that drying with superheated steam can be used to improve rice quality.
Fractal characterization of conductive Ag/flexible 3D printed PLA
Authors: Mwema F.M. , Adediran A.A. , Akinlabi E.T. , Adeleke A.A. , Olayanju T.M.A.
Published: April 2021

In this paper, thin and flexible PLA plates were prepared through FDM printing process. The traditional FDM process was adopted at predetermined optimal printing parameters of the 3D printer. The CAD designs of the samples were built on SpaceClaim modeler (ANSYS® 2019). The slicing and generation of the toolpath (gcodes) were undertaken in Cura software whereas the printing undertaken using a Desktop 3D printer (WANHAO Duplicator D10). The flexible PLA samples were designed for conductivity in smart devices; as such, they were coated with microfilms of highly conductive silver paint through a dipping method. The dipping was carefully undertaken in which the samples could soak inside the paint for 40 seconds and then removed and allowed to dry in vacuum desiccators for 12 hours. The samples were then heat treated at varying times (0, 10 and 20 minutes) in an oven at a constant temperature of 100°. The samples were then profiled using atomic force microscopy to obtain the microroughness characteristics of the Ag/PLA surfaces. The height features as well as spatial roughness characteristics were obtained through mono-fractal and multifractal approaches. The influence of heat treatment times at the reported temperature is shown to significantly shown to influence the spatial roughness characteristics of the 3D printed flexible samples.
Control of Fossil Fuel Gas Operating Conditions on the Performance of Carbon Dioxide Capture Process
Authors: Letsholo I. , Moropeng M.L. , Mavhungu A. , Agboola O. , Fayomi O.S.I , Moropeng R.C.
Published: April 2021

The emission of Carbon dioxide (CO2) from combustible flue gases is now seen as the key instrumental factor to global warming. The process of post-combustion capture from industrial flue gases via reactive absorption have the capability of substantially reducing the emissions of the greenhouse effect. This paper presents the modelling and simulation of flue gas conditions for carbon dioxide capture process utilizing post-combustion process. The obtained models were simulated using SCILAB 5.5.2 code based software. The results shows a good relevance of the modeling procedure with the fact that the volumetric flow rate of the flue gas and the Amine temperature governs the dynamics of CO2 absorption at the bottom region of the column. It is also noted in the findings that the increase in the volume of the flue gas gives rise to the concentration of CO2 at low temperatures.
Hand Gesture Recognition-Based Control of Motorized Wheelchair using Electromyography Sensors and Recurrent Neural Network
Authors: Adebayo O. O. , Adetiba E. , Ajayi O. T.
Published: April 2021

Mobility has been identified to be a major characteristic of living things. Humans who are deprived of efficient mobility either by natural or man-made factors loose significant relationship with their environment. The growing demand to produce effective rehabilitation devices for the aged population and disabled individuals, have spurred us to develop a reliable and easy to use biosignal based auto control wheelchair. This is to ensure independent mobility of persons with disabilities and the aged. In this paper, a Recurrent Neural Network (RNN) architecture called Long Short Term Memory (LSTM) is engaged for the classification EMG signals to the corresponding hand-gesture category. The LSTM model in this study yielded a validation accuracy that provides a basis for an improved solution towards real-time deployment.
Sustainability and Clean Technology: A Technological Perspective
Authors: Fayomi G.U. , Mini S.E , Fayomi O.S.I. , Odunlami A. , Oyeleke O.O.
Published: April 2021

Sustainability and the need to ensure sustainable development is an ever important issue in this present age and time, owing to the ever increasing demand for the earth’s resources, coupled with an increase in human population, human demand for rapid industrialization and the demand for energy, these have all led to adverse negative impact on the immediate environment, as a result of the strain imposed on the environmental limits of the earth’s carrying capacity. A thin line needs to be drawn, and this paper seeks to provide a comprehensive review on the subject matter of sustainability, including the different dimensions and the cross-disciplinary views on sustainability, the interdependence and inter-relationships between these dimensions, human effort in ensuring sustainability across all facets, the development of the sustainable development goals, and the challenges faced in the actualization and implementation of these goals. The achievements of the sustainable development goals were examined as well as the possible trade-offs resulting from limited resource use in the SDGs, the role of technology was also examined and how modern science and innovation can be used in driving our sustainable future.
A concise overview on optimization and modelling parameter cases in electrodeposition and composite coating technology
Authors: Ajayi-Majebi J. , Abioye O.P , Fayomi O.S.I. , Oyedepo S.O. , Ayara W.A.
Published: April 2021

Electrodeposition technology often uses the principles of electrolysis to modify the deposition of coating material on a metal surface. Numerical modelling can be used to quickly carry out modelling and optimization of these coating and resultant corrosion study processes. This allows researchers to perform a detailed analysis of a model created to simulate, analyze, and optimize the electrodeposition process. This research provides several more efficient methods of studying and optimizing anti-corrosive coating development processes and the critical parameters involved.
Evaluation and Prediction of Energy Content of Municipal Solid Waste: A review
Authors: Adeleke O.A. , Akinlabi S.A. , Jen T. C. , Dunmade I.
Published: April 2021

Researches in the literature have unveiled the potential of resource and energy recovery from waste, it can therefore no longer be regarded as trash. This study reviews the literature to evaluate and analyses studies which estimated the experimental heating value of waste and the theoretical energy potential recoverable from waste through thermochemical and biochemical routes at different case studies. It was observed in this study that most developing countries are not exploiting the full potential of energy recoverable from waste. Models developed to predict the energy content of municipal solid waste (MSW) based on the elemental analysis, proximate analysis and physical composition were evaluated. A comparative analysis of the energy prediction models was also done. Artificial neural network (ANN) and multiple linear regressions found more applications in energy prediction. Energy prediction based on ultimate analysis using the elemental composition of the waste was predominant and are the most accurate; while proximate analysis based predictions were the least. The prediction accuracy of ANN is greater than the linear regression in the forecast of the energy content of MSW. However, a major limitation in the use of these modelling techniques was identified. Most of the generalized models may not capture the peculiarity of the waste generated at a particular place or municipality and therefore may not be very accurate for specific applications at some municipalities.
Influence of Livelihood Assets on Attitude Towards Solid Waste Sanitation: A Case of Okobaba, Lagos, Nigeria
Authors: Alagbe Edith Egbimhanlu , Alagbe Olusegun Adegboyega , Sophia Okocha Dumebi , Ojewumi Modupe Elizabeth , Ayeni Augustine Omoniyi
Published: April 2021

Land form, management policy and socio-economic characteristics have been identified as factors responsible for poor solid waste management. This study examined the influence of livelihood assets on waste sanitation/disposal behaviour in Lagos Metropolis: a case study of Okobaba. A multi-stage sampling procedure was used to obtain data for analysis. From the data collected and analyzed descriptively, efforts were made to identify and examine the respondents’ socio-economic characteristics, waste sanitation characteristic, livelihood assets and the connection between livelihood assets and waste sanitation behaviour of people in the area under study. The research result established the existence of variations in the waste disposal characteristics of respondents in the area under study. Therefore, it is recommended that a deliberate policy to provide livelihood assets or conditions that will improve access to better livelihood capacity, adequate for low-income households to meet their basic psychological livelihood needs. This is imperative in ensuring attitudinal change towards waste management and advancement to a second-order need like environmental sanitation.
Mathematical Description of the Flow Dynamics of Sand, Crude Oil and Water in an Oil Well
Authors: Sanni E.S , Adefila S.S , Anozie A.N , Agboola O , Emetere E.M , Okoro E.E , Ndubuisi A
Published: April 2021

The flow of particulates and fluids from a reservoir has been described using different models. However, obtaining one model that has the capacity to simulate all the phenomena existing in a horizontal oil well may be very difficult. The model described here is very flexible and has the capacity to integrate the essential parameters necessary to give a detailed description of the flow phenomenon. Furthermore, clear descriptions of the flow dynamics, threshold and critical velocity estimation of the components that make up the phases have been attempted in this paper. Within the model’s high level of accuracy, the unsafe limits for incipient sand deposition and bed load transport were estimated to be drag forces of 8.938* (10-8-10-10 kgm/s2) as well as threshold and critical velocities of 0.0445 and 0.0134 m/s respectively for Reynolds number in the region of 300-1000. The findings of this study will aid upstream petroleum engineers in avoiding situations that will lead to critical/laminar flows which can in turn cause sand bed formation or bed load transport which can in turn lead to pipeline blockage and loss of productivity.