bluuebunny/crossref_metadata_2025 huggingface dataset:
Genetic Implications in High-Risk Pregnancy and Its Outcome: A 2-Year Study
Authors: Afifi Hanan H. , Gaber Khaled R. , Thomas Manal M. , Taher Mohamed B. , Tosson Angie M.S.
Published: February 2021

Objective The aim of this study is to evaluate high-risk pregnant females' offspring as regard the presence of any medical condition, hereditary disorder, or major anomaly as well as to document parental sociodemographic characteristics and compliance with follow-up schedules of fetal medicine and clinical genetic clinics.

Study Design This prospective 2-year cohort study of neonates and infants reported the referral indications, investigations, and diagnoses obtained through prenatal and postnatal examinations. It also reported their parental follow-up vigilance.

Results Of the 811 infants of high risk females referred 460 (56.7%) came for assessment. Mean parental consanguinity and endogamy were 67 and 71.3%, respectively. All pregnant mothers underwent first-trimester biochemical testing (plasma protein-A, α-fetoprotein [AFP], human chorionic gonadotropin [hCG]) and serial ultrasound examinations. Seventy mothers needed second-trimester biochemical testing (AFP, hCG, and estriol). Sixty-two mothers underwent amniocentesis where G-banding karyotype, fluorescence in situ hybridization and targeted molecular testing for the specific gene mutation of single gene disorders were conducted according to suspected disorders. High quality fetal ultrasound was performed when brain malformations were suspected, while 16 fetuses required brain MRI examination. Mean age of newborns at first examination was 26.5 days. They were grouped according to the maternal indication for referral. Upon examination, 18 neonates had confirmed congenital malformations/genetic disorders. Five of them were diagnosed prenatally. In four other fetuses with single gene disorder, the molecular diagnosis of their affected siblings was not established prior to this pregnancy; thus, prenatal diagnosis was not possible. The remaining nine cases were diagnosed postnatally.

Conclusion Parental consanguinity and endogamy were increased among high-risk pregnancies. Public awareness about potential adverse effects of consanguineous marriages and the importance of genetic testing are imperative. A structured multidisciplinary team of specialists in fetal medicine, clinical genetics, and neonatology provides good genetic services. Expansion and financial support of these services are urgently required.

Key Points
How do elite female team sport athletes experience mental fatigue? Comparison between international competition, training and preparation camps
Authors: Russell Suzanna , Jenkins David G. , Halson Shona L. , Juliff Laura E. , Kelly Vincent G.
Published: February 2021

Mental fatigue has been shown to negatively influence physical, technical and tactical aspects of sporting performance. However, mental fatigue is not routinely monitored or managed in elite sport and it is not clear whether mental fatigue occurs and/or changes across the varied contextual demands experienced by elite athletes in training, preparation and competition. This study explored self‐report measures of mental fatigue across eight training camps and six competition periods (two benchmark tournaments and four international test series) with international netballers (n = 22, 25.9 ± 2.7 years) during the 2018–2019 representative period. Mental fatigue was higher during training camps (p < 0.001; 3.20 [3.12, 3.27]) and preparation camps (p < 0.05; 3.27 [3.19, 3.34]) compared to the competition periods (3.49 [3.44, 3.55]). Significant within‐group differences were also identified between individual preparation camps and competition subsets. Higher mental fatigue was reported during the preparation camp for international test series 2 comparative to the preparation camp for benchmark tournament 1 (p = 0.047). For individual competitions; greater mental fatigue was found during the international test series 3 competition in comparison to both the benchmark tournament 1 (p <0.001) and international test series 1 (p = 0.020) competition periods. International representative netballers experience differing levels of mental fatigue across training and preparation camps and competition periods. Practitioners should be aware that athletes report instances of elevated mental fatigue across camps, and competition. Mental fatigue is not limited to competition and thus is recommended to be monitored during periods of training and preparation for competition.

Highlights

International representative netballers experience differing levels of mental fatigue across camp and competition environments.

Mental fatigue was higher during training camps and preparation camps compared to the competition periods.

Mental fatigue is not limited to competition so is recommended to be monitored during periods of training and preparation for competition.
Empirical analysis of the spatial relationship between urban agglomeration economic network and economic growth based on big data
Authors: Liu Bo , Du Juan
Published: February 2021

A reasonable and orderly network space structure is an important support for the coordinated economic development of urban agglomerations. Based on the urban panel data of the three major urban agglomerations in the economic belt from 2010 to 2019, this paper first uses social network analysis methods to quantitatively identify the cyberspace characteristics of the three major urban agglomerations. On this basis, a spatial measurement model was constructed to test the heterogeneous influence of the network space structure and the coordinated economic development of the three major urban agglomerations. The results show that after controlling the relevant influencing factors, the improvement of the urban agglomeration’s spatial network level has a direct promotion effect on its coordinated economic development, but the indirect spatial spillover effects show obvious differences. Among them, the higher the level of networking, the more obvious the positive spatial spillover effect, and the higher the level of coordinated economic development of the urban agglomeration. Therefore, strengthening the network connection between cities and forming a closely connected and functionally complementary urban agglomeration network spatial structure is conducive to giving full play to the positive spatial spillover effect and realizing the coordinated economic development of the urban agglomeration.
Security vulnerability and encryption technology of computer information technology data under big data environment
Authors: Chen Weijie , Chen Guodong , Zhao Yanheng , Zhang Jinghua
Published: February 2021

In recent years, the traditional encryption storage technology and management methods have been difficult to satisfy the demand of big data in terms of speed, capacity, storage efficiency and security, along with the rapid increase of data volume. Data security is facing great challenges and challenges. To solve this problem, this paper proposes a de-redundancy method based big data encryption algorithm. Firstly, bloom filter technology is used to decrease the dimension of big data. Based on its remarkable advantages, bloom filter space and query efficiency and variable-length block detection scheme with less additional overhead, duplicate data detection and deletion algorithm suitable for large data is designed and implemented. Secondly, based on eliminating redundancy of big data, combined with the characteristics of the elliptic curve encryption algorithm and AES block cipher mode in terms of computing speed, parallelism and security, an encryption approach based on data de-redundancy technology is presented. According to the evaluation system of the encryption algorithm, the encryption time, keyspace and security of the new algorithm are evaluated. Experimental results reveal that the scheme has better security, and the presented approach can increase the speed of the encryption process, and decrease the encryption time and consumption.
Designing a test rig for ultimate load test of small horizontal axis wind turbine rotor blades
Authors: Tien T T , Hung P Q , Hieu N K
Published: February 2021

This paper presents a design of a test rig for structural static load testing of small horizontal wind turbine blades. It is a next step after the success of the DeVie project, a join-research project to boost the wind energy knowhow between Germany and Vietnam. According to the IEC-61400-23 standard for full scale ultimate load test of rotor blades, and based on existing facilities of HCMUT, especially the aerospace engineering lab. and the engineering mechanics lab., we propose a prototype of a test-rig for ultimate load test of rotor blades. And a rotor blade of 4 meters in length, manufactured by China, is used in case study of our structural static-load test-rig. The obtained results will be compared with the reverse engineering this rotor blade with QBlade/FAST in the same blade loading.
Kinetic Model Based on Eley-Rideal and Irreversible Mechanism for Multilevel Reaction of Biodiesel Synthesis
Authors: Chairuddin Z B , Perdani M S , Putri D N , Utami T S , Hermansyah H
Published: February 2021

As a new technology, an ion exchange catalyst as a heterogeneous catalyst became a good potential in exchanging the homogeneous base. A kinetic model based on Eley-Rideal mechanism and irreversible multiple reaction of biodiesel synthesis by using heterogeneous catalyst has been simulated in this work. The aim of this study is to obtain the kinetic parameter value of biodiesel synthesis with ion exchange heterogeneous catalyst. In addition, a sensitivity analysis was also studied to evaluate the effect of kinetic parameter value against the change in concentration profile of biodiesel synthesis. A kinetic model data used in this study was obtained from different experiment literatures. Based on the kinetic model of Eley-Rideal mechanism, the results of reaction rate constant values (k1-k6) were 7.87×10−3, 8.75×10−7, 1.1×10−2, 1.12×10−6, 9.14×10−3 and 5.09×10−4, respectively. In addition, for irreversible kinetic simulation, the most accurate value was showed that 1.5 mol/l of fatty acid at initial reaction has been changed after 180 minutes reaction into 1.5×10−4 mol/l of trygliceride, 2.25×10−4 mol/l of diglyceride, 2.4×102 mol/l of monoglyceride and 1.453 mol/l of biodiesel yield. The obtained values of irreversible kinetic parameter (k1-k3) were 7.86×10−3, 1.11×10−2 and 9.15×10−3, respectively.
Development of air and GHG emission calculators integrated in UNISIM-based process simulator: case study of a gas sweetening with effects of process parameters
Authors: Permana K S , Alimin A A , Ibadurrohman M , Susanto B H
Published: February 2021

This paper reports the development of air and GHG emission calculators embedded in UNISIM-based process simulators, which are used as a computational tool to generate estimated values of air and GHG emission integrated with process simulation. A gas sweetening unit is taken as an example for the case study, with the effects of process parameters on the resultant emission being emphasized. Air and GHG calculators are developed based on up-to-date standards and national regulations concerning oil and gas processing facilities. The simulation’s base case is designed to produce sweet gas with sales gas specifications using MDEA solvent, which reveals 1,527 tonnes CO2e/day (representing GHG emission) and 0.348 tonnes SO2e/day (representing air emission). Pressure decline in the sour gas stream leads to a slight increase in emission up to 1,554 tonnes CO2e/day and 0.368 tonnes SO2e/day because of the additional compression systems. Using DEA as a solvent does not significantly affect air and GHG emission for the same sweet gas specification. The simulation also revealed that the gas flow rate (capacity) is not directly proportional to the eventual emission. In this case, the driver for air and GHG emission is the reboiler’s duty, dependent on the amine flow rate. As there is a critical (minimum) lean amine flow rate regarding the sour gas flow rate, the non-proportional relationship between gas flow rate and emission is expected. To produce sweet gas with LNG specification, the emission rises considerably to 2,652 tonnes CO2e/day and 0.747 tonnes SO2e/day because CO2 loading of rich amine is higher in this case, eventually increasing the reboiler duty significantly.
Analysing the choice and pattern of needs of transportation mode for domestic tourists in Bali
Authors: Wiradnyana I G N P , Suthanaya P A , Wedagama D M P , Yana A A G A , Dissanayake D
Published: February 2021

Travel behaviour of domestic tourists concerning their choices of transportation mode has a significant role in managing traffic in the tourist destination. This study analyses the domestic tourists’ choice and their pattern of needs of transportation mode in Bali as the case study. The developed models are based on utility maximisation of underlying preferences for each of the available modes of transport. Domestic tourists are randomly selected and interviewed using the questionnaire to record their daily trips. The study result indicates that income, number of visits and travel companions significantly influence the choice of transportation mode for domestic tourists. Meanwhile, income, number of visits, length of stays, trip purpose and main issues in selecting local transport mode significantly affect the pattern of needs of transportation mode for domestic tourists. For example, two accompanying persons will be three times more than that of seven persons or more to choose motorcycle and bus than a car. Domestic tourists who have visited Bali twice will be three times more than those who visited Bali once to use travel agents and rented vehicles than public and online transport and others. Further studies on short duration trips and sustainable mode of transport are suggested.
Conceptualizing multi actors’ collaboration in smart tourism destination
Authors: Damayanti M , Tyas W P , Aswad W O S J
Published: February 2021

Smart tourism destination is applied as the advance application of smart cities concept. Smart tourism destination integrates the advance technology application into advanced physical infrastructures in order to enhance a city competitiveness by focusing on innovative service for the tourists. However, in its application, a significant issue related to governments’ capacity is aroused. The government needs to be more innovative, adaptive and technology focused as providers of infrastructure and data. There is a call for multi actors’ collaboration to overcome this issue. Hence, this paper aims to conceptualize multi actors’ collaboration in managing a smart tourism destination. The framework was developed by reviewing the concepts of smart tourism, governance, collaboration, and coopetition. The collaboration among actors can be developed by considering collaboration background, purpose and motivation, member selection, as well as trust. These actors might involve in a cooperation, coordination, collaboration and/or coopetition.
Improving the quality of wastewater in traditional chicken slaughterhouses using moringa seed powder
Authors: Merdana I M , Suada I K , Watiniasih N L , Sudira I W , Sudimartini L M , Ani N L S , Budiasa K
Published: February 2021

In the city of Denpasar, Bali, Indonesia, there are hundreds of home-based chicken slaughtering industries. The slaughtering process produces liquid waste from washing chicken and equipment mixed with feces, blood, traces of protein, and fat. This waste contains high concentrations of organic material, dissolved solids, pathogenic microorganisms, and other hazardous substances that can pollute the environment. The environmental damage that occurs will adversely affect the health of humans and the surrounding animals. This study aims to determine the effect of Moringa seed powder on the quality of traditional chicken slaughterhouse waste in terms of pH, Total Suspended Solid (TSS), and Total Dissolved Solids (TDS). This study used a randomized group design with a split time pattern. The results showed that the concentration of Moringa seed powder of 200 mg/L with a deposition time of 60 minutes made the pH of wastewater close to normal pH, and also significantly reduced TSS and TDS (P<0.05). It can be concluded that moringa seed powder can improve the quality of traditional chicken slaughterhouse wastewater.
Second-wave gentrification and quasi-public space in Kebayoran Baru
Authors: Ratriananda R , Herlily
Published: February 2021

Kebayoran Baru is a sub-district in South Jakarta, hosting one of the largest private business districts in Indonesia. Originally planned and built as a satellite city of Jakarta in the 1950s, it is now one of the most expensive areas in the country. In the last ten years, there has been a rapid transformation within the area due to the land use change from what is predominantly residential to commercial; cafes and restaurants in almost every street. The rapid growth of these commercial and exclusive “public space” or quasi-public space in the form of cafes and restaurants is one of the signs of gentrification. Consumer class life-style changes the condition of the gentrified neighborhood and contributes to the increase of the land value, making it unaffordable for the residents and causing them to seek housing areas with lower cost. This is similar to what has been happening in Kebayoran Baru. However, the area has always been a relatively middle-class neighborhood from the beginning. This indicates that what is currently happening in Kebayoran Baru is actually a second-wave gentrification. Through archival studies and interview with local residents, this research aims to understand the spatial transformation and its relation to social production of public space that considers democracy.
Monitoring Area and Health Changes of Mangrove Forest Using Multitemporal Landsat Imagery in Taman Hutan Raya Ngurah Rai, Bali Province
Authors: Nurhaliza A P , Damayanti A , Dimyati M
Published: February 2021

The mangrove forest is a very productive ecosystem, both economically and ecologically. Mangrove forests can protect settlements, buildings, and agriculture on the coast from strong winds or seawater intrusion, support the livelihoods of coastal communities and store high carbon stocks. Regardless of its role, the Taman Hutan Raya Ngurah Rai Mangrove Forest continues to be threatened by human activities. This study aims to monitor changes in the area, health, and water quality of mangrove forests. The data used are Landsat 7 ETM + imagery and Landsat 8 OLI in 2010-2020. We used NDVI vegetation indices to analyze mangrove health and Total Suspended Solid (TSS) to investigate the water quality of the mangrove forest. Temporal water quality parameters are obtained by using the TSS algorithm on Landsat imagery. The results showed variations in mangrove forest area changes, NDVI values, and water quality. In 2010 - 2015 Mangrove Forest Area increase by 117.72 ha but decrease in 2015-2020 by 96.21 ha. Mangrove health was also improved in 2010-2015 but the decline in 2015-2020. Meanwhile, mangrove forest water quality seen from the TSS distribution tends to grow from 2010 to 2020.
The effect of implementing HIV testing on healthcare services: a literature review
Authors: Maria A
Published: February 2021

People Living with HIV (PLWH) in Indonesia continue to increase in number. Government is needed to know objectively about the number of PLWH. One way is by HIV testing. HIV testing is an important strategy for preventing the spread of HIV. This paper reviews the effectiveness of HIV testing in other countries in order to reduce HIV transmission, so hopefully the result can be adapted to be done in Indonesia for making health policy, especially on urban healthcare services. The publications reviewed comes from Science Direct, PubMed, as well as Google Scholar database covering the period 2016 - 2020 using the keywords “HIV” or “AIDS” and “HIV Testing” and “Healthcare Services” and ‘Urban Healthcare”. Five articles were reviewed in this study. Based on this review, the implementation of HIV testing can be done on several strategies, such as community-based, home-based as well as provider-based testing. Respondents who were given HIV test also varied, from neonates to adults. All of the strategy can succeed for implemented. HIV testing is a promising intervention strategy on healthcare services to reduce HIV transmission that can be adapted in Indonesia.
Comparison of the performance of high-rise building based on various design code
Authors: Lim J X , Azizan N Z N
Published: February 2021

The main purpose to conduct this research is to compare the performance of high-rise building based on design code BS 8110, EC 2 and the combination EC 2 and EC 8. 10-storey high-rise building was designed based on the 3 types of design codes. The design and analyses were used software method and manual calculation to define the detail of the structure. The software that was used to design is ETABS. The 3 main components that used to compare the structural and costs performance were beams, columns and slabs. As the results, the area of tension reinforcement provided for a column using the combination EC 2 and EC 8 design was required more rebar compared to another two codes. For the cost performance, BS 8110 required higher costs compared to Eurocode. This is because of the safety factor for the load analysis. For Eurocode, design with considers seismic effect had higher costs compared to design without considering the seismic effect but the cost difference between this two is about +1.46%. Therefore, by referring the result had been done, it can conclude that including of seismic effect did not affect too much on the cost performance.
Engineering characterisation of weathered rock at Sri Jaya, Pahang, Malaysia
Authors: Awang H , Salmanfarsi A F , Arizam A , Ali M I
Published: February 2021

Erosion and weathering are major processes that may reduce the strength of rock slope material or may cause significant change in the physical state of the slope. These can lead to landslide or slope failure, bringing significant risk in terms of properties damage and/or human safety. In Sri Jaya, Pahang, a large body of granite is exposed as cut rock slope, which shows different zones of weathering grade. Field and laboratory tests were carried out to determine the mechanical properties and the physical properties of weathered rocks of the slope, which involved a number of testing for the Schmidt rebound hammer test, point load test, moisture content, water absorption and specific gravity. From the tests, the study has determined the engineering properties of weathered rock of the slope where weathering grade and engineering properties of rock were correlated. A strong correlation was found between the weathering grade and engineering properties where they showed significant correlations for this site. It is proven that the engineering properties could be used as reliable parameters in determining the weathering grade of material in the field.
Stability of weathered cut slope by using kinematic analysis
Authors: Awang H , Salmanfarsi A F , Aminudin M S , Ali M I
Published: February 2021

Rock slope engineering involves the designing of safe and stable rock slopes for a certain lifespan. Different rock slopes exhibit different strengths of material that reacts differently to external forces. Rock strength can decrease over time due to weathering process. In addition, the presence of discontinuity can lead to structurally controlled slope failure. The study focuses on a large exposed rock slope in Sri Jaya area, where the exposed granitic rock was cut by several sets of discontinuities. In addition to the discontinuities, the slope exhibited several weathering grades. The objective of this study is to map the weathering and discontinuity of the rock slope, in order to determine the stability of the slope. Schmidt rebound hammer tests were carried out to determine the extent of the weathering grade of the slope material. The collected field data were then analysed using the kinematic analysis to determine potential mode(s) of failure. From the analysis, it is predicted that there is significant percentage for toppling failure and wedge failure to occur in the weathered rock material.
Effect of confining pressure and loading frequency on dynamic characteristics of Batu Pahat marine clay
Authors: Saleh S , Mohd Yunus N Z , Ahmad K , Mat Said K N
Published: February 2021

This paper presents the laboratory study on the dynamic characteristics of marine clay subject to cyclic load over a long period of time. Remoulded marine clay samples were used to conduct the experiments using a dynamic triaxial machine. Confining pressure and loading frequency were varied while pore pressure development, resilient strains and plastic strain resulting from the application of cyclic loading were observed. The results acquired from this study revealed that as soon as the cyclic loading was introduced, it induced pore pressure that triggered the rapid accumulation of permanent strain and gradual increase in resilient strain. However, after the strain reached a stable value, the rate of accumulation of the permanent deformation started decreasing. The results also showed that an increase in confining pressure improved the marine clay resistance to cyclic loading. Similarly, when the loading frequency increased, it caused a decrease in strain generation and vice versa.
Impact of seismic design on cost of structural materials for two storey hostel building in Sabah
Authors: Roslan H A , Adiyanto M I , Harith N S H , Faisal Ade , Razak S M S A
Published: February 2021

Previously, damaging earthquakes were fortunately rare in Malaysia. However, after Sumatera-Andaman earthquake on 26 December 2004 affected Peninsular Malaysia causing deaths, injuries and loss of property. Furthermore, some of the local earthquake that had occurred in Malaysia are probably due to the reactivations of ancient inactive fault due to increasing seismic activities in and around Malaysia. On 5th June 2015, Malaysia experienced a devastating earthquake with magnitude Mw 6.0 in Ranau results in 18 fatalities and affected 61 buildings. Mostly, the fatalities and injuries persistent during an earthquake is caused by structural failures which not include the seismic action into design. Reinforced concrete hostel building in school area will act as a temporary shelter for refuge during the disaster and until it dwindles. Although Malaysia is located on a stable plate and far from the Pacific Ring of Fire, it is essential to consider seismic practice, especially when dealing with cost. Therefore, this paper presents the influence of seismic consideration on cost of material and the factors which influencing the cost by implementing the soil factor, S as proposed by National Annex to Eurocode 8. A typical two storey reinforced concrete hostel building has been generated as basic model. A total of four soil type namely soil type B, C, D and E and five seismicity level has been taken into account where the value of reference peak ground acceleration, agR = 0.04g, 0.06g, 0.07g, 0.12g & 0.16g. Overall, this research work had been conducted based on 3 phases. Based on result, the cost of structural works for the whole building increases around 1% to 12% depend on soil type and level of seismicity.
Exploring risk associated to public road infrastructure construction projects
Authors: Razi P Z , Ali M I , Ramli N I
Published: February 2021

This study proposed an empirical study of risk assessment module for public road infrastructure construction projects. This study employs a case study of a public road infrastructure construction projects located at a state in East Coast of Malaysia. The projects involve the construction of new four (4) lane road along 5.875km aligned from the state route to federal route. The project will be benefited to the federal and state economic development, while for the local residents, they will benefited with reducing of traffic congestion. However, due to several uncertainties, schedule delays have occurred to the particular area. Thus, this study conducted to explore the risk associated with the project, and four delay factors and thirteen sub-factors have emerged prior to the consultations with project team experts. The delay risk assessed quantitatively employing the Analytic Hierarchy Process (AHP) technique by prioritising the risk delay factors. Design of the AHP model and the operation of the pair-wise rating was employed the super-decision software. The analysis revealed that when considering all factor concerning the goal, the project risk (0.348) captured the most prioritised risk factor that caused by land acquisition issues (0.555), followed by environmental (0.233) caused by the uncertainty of weather (0.733), operational risk (0.309) caused by late submission of approved for construction drawing causing a delay in projects submission delay (0.396) as the last prioritised risk factors in the construction project and technical risk (0.110) caused by the new design does not consider existing drainage system causing flood (0.352). Findings of this study will beneficial to the project team, as the prioritised risk will act as their references and guidance to avoid delays and incurring of project costs.
Compressive Strength of Concrete containing Eggshell Powder as Partial Cement Replacement
Authors: Mohd Arif S , Rokiah O , Khairunisa M , Chong B W , Chek Y C , Youventharan D , Ramadhansyah P J , Doh S I
Published: February 2021

The emission of carbon dioxide by cement manufacturing has caused a negative impact on society and environment such as the greenhouse effect. Disposal of eggshell has created a lot of environmental problems due to its reusability of material is low in many industries. Recent years, researchers have found the value of eggshell due to its high content of calcium carbonate. Consequently, it has encouraged the researchers to incorporate the eggshell as cement replacement for concrete production hence contributing to sustainable development of building materials. This experimental study is aimed to investigate the optimum percentage of eggshell as cement replacement for high strength concrete (HSC) and the effect on HSC were studied in terms of workability, compressive strength and rebound hammer test as well as ultrasonic pulse velocity (UPV). Four types of mix proportion of HSC were prepared namely 0% ESP, 5% ESP, 10% ESP and 15% ESP. Based on the experiment results, the workability of the fresh concrete mixtures decreases as the percentage of eggshell replacement increases. Mix containing 10% eggshell specimen achieved the highest compressive strength of 68.4 MPa at 28 days. Furthermore, the 10% eggshell specimen also achieved the highest value of rebound number of 42.1 and pulse velocity of 6.50km/s at 28 days. Correlation between actual compressive strength and UPV was more reliable and had accurate expression through regression analysis compared to rebound hammer test. Conclusively, the concrete containing 10% eggshell as partial cement replacement exhibits higher compressive strength than control concrete has the potential to be used as construction material.
The Effect of Palm Oil Fuel Clinker Powder and Cockleshell Powder as Cement Replacement on Durability Properties of the Concrete Mortar
Authors: Qasem A A , Almekhlafi M A , Yahaya F M
Published: February 2021

The concepts of eco-friendly building are getting more attention today. The standard materials of concrete that used such as cement and aggregate are not totally environmentally friendly. Thus, many materials from natural sources can be an alternative to the realization of the green building concept. As a result, many researchers have devoted their attention towards identifying eco-friendlier substitutions to be used in concrete. This study was conducted to investigate the efficiency of two different types of waste materials which are palm oil clinker (POC) and cockle shell (CS) as partial replacement of cement on durability aspects. The POC and CS materials were ground to achieve a small particle size to fit with the concrete mix as cement replacement. The replacement of cement was at different levels (10% and 20%). Six mix proportions were made with different percentage of palm oil clinker powder POCP and cockle shell powder CSP. The specimens were cured by immersing in water for 7 and 28 days. The tests that were conducted were acid resistance test and water absorption test. Therefore, the experiment result showed that the POC had a negative impact to the concrete in both tests while the CSP proved it is resistance to acid.
Increment of material usage in construction of four storey reinforced concrete building due to seismic design
Authors: Adiyanto M I , Ramadhansyah P J , Ramli N I , Harith N S H , Razak S M S A , Mustapa S A H S
Published: February 2021

Malaysia is fortunate because it is located outside the Pacific Ring-Fire region which is seismically active. However, it still exposes to earthquake hazard from Far-Field earthquake from neighbouring countries. In Peninsular, it is exposes to Sumatra-Andaman earthquake from Indonesia. In East Malaysia, to states namely as Sabah and Sarawak are expose to Philippines earthquake. Besides, Malaysia also experienced earthquakes from local faults such as Bukit Tinggi in 2007. On 5th June 2015, a moderate earthquake with Mw6.1 occurred in Ranau, Sabah which caused 18 fatalities. The same event also caused damage to 61 buildings around Ranau and Kundasang. For the sake of safety, construction of new buildings in Malaysia has to consider seismic design. This paper presents a study to evaluate the increment of construction materials used due to consideration of seismic design. A typical four-storey generic reinforced concrete school building had been used as model. This study adjusted the value of reference peak ground acceleration, α
gR in modelling, analysis, and design process. The concrete grade was fixed as C30. Four soil types had been considered for all models with seismic design consideration. Findings from this study demonstrate that the consideration of seismic design caused the increment of steel reinforcement around 16% to 32% for beam and 1% to 14% for column. In term of cost of structural work, consideration of seismic design increases the cost in range of 2% to 5% compared to the nonseismic design. Therefore, it is worth for Malaysia to fully implement the seismic design in new development.
Determining Fracture Energy in Asphalt Mixture: A Review
Authors: Radeef H R , Abdul Hassan N , Zainal Abidin A R , Mahmud M Z H , Mohd Satar M K I , Mohd Warid M N , Al Saffar Z H
Published: February 2021

One of the most common pavement distresses is related to surface cracking. Therefore, identifying and characterizing fracture properties of asphalt mixtures are significant towards a better pavement design. This study reviews four experimental methods used to determine the fracture energy in asphalt mixture. These methods include circular bending test (SCB), disc shape compact tension test, single-edge notched beam, and indirect tensile test. Each experimental method has its characteristics and advantages. These experimental methods are reviewed on the basis of their features, efficiency, and parameters measured. The coefficient of variation (COV) for the fracture tests reflects the result reliability of the test methods. Results with low COV value reflect low variance in the fracture test, whereas high COV indicates high variance. The review indicates that the SCB test is commonly used for determining the fracture energy in asphalt mixtures due to its simplicity and data reliability.
Face recognition in four types of colour space: a performance analysis
Authors: Nugroho Hanung Adi , Goratama Rezqy Dwikara , Frannita Eka Legya
Published: February 2021

Face detection is one of the problems in computer vision with a large number of researches works. This research work aims to analyses the effect of performing various color spaces in face detection. 1100 images provided by SFA dataset was used in this study. The proposed method was initiated by pre-processing step. Then, segmentation step by using thresholding and morphological operation was conducted. For selecting face area, some features such as eccentricity, area and texture features were used. Finally, for validating the reliability of the proposed method, UTKface dataset was applied. This study obtained more than 90% accuracy of face detection in each color space. Moreover, the highest accuracy was obtained in YCbCr color space with 96.13%. This result was also strengthened with other experiment by using UTKface dataset. This experiment achieves accuracy of 80%. According to the performance analysis, the proposed method is reliable for recognizing face characteristic.
Data Mining Approach for Learning management system
Authors: Dhika Harry , Destiawati Fitriana , Surajiyo  , Jaya Musa
Published: February 2021

During the pandemic, COVID-19 had an impact on education. All academic activities are hampered, teaching and learning activities must continue to run, and the efforts made are to do distance learning or e-learning. This relates to the integration of systems that must be synchronized with computers, mobile, and technology that can manage learning media electronically. In this study, the LMS in the COVID-19 pandemic period aims to optimize a learning system and provide convenience in the use of technology to deal with this pandemic. The results of this study are explaining the testing of the COVID-19 dataset with the concept of data mining and providing convenience in the application of Moodle-based e-learning so that the development of LMS can be maximized.
Utilization of the Android physics virtual lab application to improve understanding of light and optics concepts
Authors: Erfan M , Maulyda M A , Hidayati V R , Widodo A , Ratu T
Published: February 2021

This research aims to analyze the effectiveness of the application of virtual laboratories based on android applications on the learning outcomes of prospective elementary school teacher students about light and optics concept in daily life. This research is a quantitative with one group pre-test post-test design. The treatment given was in the form of learning about light and optics concepts using the AndroidPhysics Virtual Labapplication. The sample in this study was taken using cluster random sampling technique and obtained class 5H (24 students) as the sample. The data in this research were obtained by tests carried out before treatment (pre-test) and after treatment (post-test). The data from pre-test and post-test result were tested for normality, then paired t-test, N-gain test and Effect Size test were performed. The N-gain test value that have been obtained was 0.784 (high category) and the coefficients of effect size test results was 1.781 with the strong effect category and from the t-test results there was significant difference between students’ understanding of concepts light and optics before and after learning. with the AndroidPhysics Virtual Labapplication, so from this study it can be concluded that the AndroidPhysics Virtual Labapplication is effective in enhancing students’ understanding about light and optics concepts of prospective elementary school teachers.
Comparison of the simple additive weighting saw method and multi-objective optimization by ratio analysis MOORA
Authors: Arief Muhammad , Triayudi Agung , Sholihati Ira Diana
Published: February 2021

The manual assessment process is very likely to be at risk of errors and sometimes there is nepotism fraud and takes a long time due to the large number of employees. Currently, the East Jakarta Administration City Water Resources Water Resources Department does not yet have a special method and application that is used for evaluation and performance appraisal. Therefore, the purpose of this research is to build a decision support system using the simple additive weighting (SAW) method and multi-objective optimization by ratio analysis (MOORA). With the hope that it will make it easier to carry out the process of evaluating and appraising employee performance and can be carried out objectively with predetermined criteria.
User Satisfaction Analysis for Event Management Systems Using RAD and PIECES Framework
Authors: Julian Budi , Triayudi Agung , Benrahman
Published: February 2021

The National University Information System Student Association often holds events or activities every period it takes place but has not been integrated and well managed. Many problems were caused, such as: large costs, data loss, long queuing services, and large human resources. Seeing from these conditions, the authors conducted a study that aims to determine the level of user satisfaction analysis of the event management information system that has been designed for the activities of the National University Information System Student Association. This study uses 3 methods, namely Rapid Application Development (RAD), Waiting Line and PIECES. The average result of the analysis of respondents on questions on the performance aspect was 4.35, the information aspect was 3.6, the economic aspect was 4.45, the control & security aspect was 3.50, the efficiency aspect was 3.64 and the services aspect was 3,825. From the results of the average assessment of the total score for the PIECES aspect, it was obtained 3,894 or 77.88% of respondents said they were satisfied with this system. This research contributes to the governance of activities organized by the Information Systems Student Association so that they can be well integrated and managed.
Comparison of the K-Nearest Neighbor algorithm and the decision tree on moisture classification
Authors: Nurdiawan Odi , Kurnia D. A , Solihudin Dodi , Hartati Tuti , Suprapti Tati
Published: February 2021

Soil moisture is a parameter needed by plants in terms of plant growth. In determining the appropriate soil moisture for plants requires a control system. This study uses a comparison of KNN and decision tree algorithms with the aim of being able to determine soil calcification with yield parameters namely moist and dry, so that it has good accuracy compared to the accuracy of the Decision Tree algorithm with an accuracy of 55.77% with dry class recall of 62.69% moist 51.92% dry precision class 58.33% humid 47.37% and K-Nearest Neighbor with 72.69% accuracy dry class recall 80.60% humid 63.16% dry precision class 72.00% humid 73.47%. The results of the above model testing can be concluded that the K-Nearest Neighbor is the most accurate algorithm for classification of moist soil
Comparison of machine learning algorithm for Santander dataset
Authors: Wijaya Yudhistira Arie , Suarna Nana , Iin  , Hamonangan Ryan , Nining R
Published: February 2021

The dataset for Santander banks is released on kaggle.com to decide whether the customer makes a transaction or not. The classes in this dataset are 2 with 200,000 entries in records. Earlier experiments using the regression algorithm led to a precision rate of 89%. In this analysis, the best accuracy value from the algorithm was obtained by using 6 different algorithms, namely Support for the Vector Machine (SVM), Neural Network (NN), Naive Bayes (NB), Decision Tree (DT). Before performing the data mining with the algorithm, preprocessing is carried out using a normalizing technique using the range transformation method with values 0 and 1. From the study, the best results were obtained in a Decision Tree 96.03% accurate algorithm, 95.82%, and 95.71%, 95.38%, 90.42%, 90.42%, and Naive Bayes 14.69%. The algorithms of the Decision Tree are 95.03%, 95.71% and 92%. Except for the Naïve Bayes algorithm, the precise value is better than previous study.
Clustering of internet network usage using the K-Medoid method
Authors: Martanto  , Anwar Saeful , Rohmat Cep Lukman , Basysyar Fadhil Muhammad , Wijaya Yudhistira Arie
Published: February 2021

The use of the internet network at Wahidin Vocational High School (SMK) Cirebon City is a very significant need in supporting the progress of learning. The ease of using the internet has made the academic community free to use the internet network facilities provided by the school and carry out the activities they want without any control. Causing the academic community to freely access the web that is not related to ongoing education, and certainly this matter will be very disturbing in the teaching and learning process. This matter is in order to identify accurate analysis also using Information Mining as information processing. After that, using the clustering algorithm procedure is K-Medoid. The K-Medoid procedure is able to carry out information grouping on the use of social media access which is often accessed by the academic community throughout the school. Grouping using the K-medoids algorithm can be known that the use of internet network access is on average used to access social media compared to accessing E-learning. It is suitable from the results of research that was tried if the use of WhatsApp reached an average of 126 users, after that accompanied by Instagram, its usage reached an average of 108 users, then accompanied by E-Learning, the average usage reached 90 users, after that it was accompanied by Facebook and YouTube which an average of 71 users. Thus, from the research that has been tried, it is necessary to implement layer 7 protocol firewall security to block social media access so that internet network access at Wahidin Vocational High School (SMK), Cirebon City. Used as a suitable early idea is to facilitate the academic community to maximize E-learning education.
Market basketball analysis algorithm for determining products association
Authors: Basysyar Fadhil Muhammad , Dwilestari Gifthera , Bahtiar Agus , Martanto  , Nuris Dienwati Nisa
Published: February 2021

Market basket analysis may be a technique identify the association between couple’s products purchased jointly and identify cases. Scene an occurrence is when two or more things happening. Market basket analysis makes rules if-then, scenario for instance, if an item purchased a and b will likely. bought items rule is probability in nature or, in other words, they are available from the incident. In observation the frequency is that the proportion of a basket of things which will be employed interesting. Rule, price, product placement and various varieties of cross-selling strategy. In order to create it easier to grasp, think in terms of market research handbasket in a very supermarket. Market basket analysis taking data on the transactions containing an inventory of all items that bought by customers in a very purchase. The technique is ascertaining the relations which product bought on other products. This relationship then wont to construct the containing the if-then items purchased. Market basket analysis also called a rule association or analysis affinity, learning may be a technique data processing can be used in numerous fields, as education, marketing, informatics and science. The aim is to include retailer’s awareness of buyers’ actions in order for the retailers with knowledge about the actions of purchasers, which will allow the tailor to make the right choices. All of the numerous market basket algorithms available to try to do. Algorithms, whose current work is on statics and which did not catch data changes in time, but algorithms not only intended to mine static information, but also provided new ways of calculating modifications on paper-listed association processing rules, and provide new algorithms that could stimulate market engagement and encourage up-selling.