The purpose of this research to explore the impact of parental involvement on the academic achievement of students at Crescent International School and to determine whether the demographic variable of parents has an effect on their involvement in their children's education. In addition, the study sought to examine what existing literature review found on the relation between parental involvement and children's academic achievement. The present study was carried out at Crescent International School in Bangkok, Thailand. The responses of 12 parents, whose children are enrolled in secondary level, were taken as samples for the current study. The Intensity Sampling Technique was used in this research. A questionnaire about demographics of parents was distributed and interviews were conducted to assess the level of parent involvement. To find out student achievement level, the students results were used. The qualitative method was used to gauge the impact of parental involvement on students' academic achievement. The results revealed that parental income level has no impact on the level of involvement in their children's education. However, educational level, age, employment and marital status of the parents had greater impact on parental involvement. The main findings of this research indicated that students with highly involved parents had better academic performance and higher test scores in all the subjects compared to students whose parents were not involved in their education. the findings, suggested that parents should grow more awareness on the importance of visiting and supporting their children in school. It was also recommended that parents should take an active role in assisting their children's education at school and at home since they are the first teachers of their children.
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Ibrahima Naite 2021 IOP Conf. Ser.: Earth Environ. Sci. 690 012064
Anna F Rusydi 2018 IOP Conf. Ser.: Earth Environ. Sci. 118 012019
Conductivity (EC) and total dissolved solids (TDS) are water quality parameters, which are used to describe salinity level. These two parameters are correlated and usually expressed by a simple equation: TDS = k EC (in 25 °C). The process of obtaining TDS from water sample is more complex than that of EC. Meanwhile, TDS analysis is very important because it can illustrate groundwater quality, particularly in understanding the effect of seawater intrusion better than EC analysis. These conditions make research in revealing TDS/EC ratios interesting to do. By finding the ratio value, TDS concentration can be measured easily from EC value. However, the ratio cannot be defined easily. Previous research results have found that the correlation between TDS and EC are not always linear. The ratio is not only strongly influenced by salinity contents, but also by materials contents. Furthermore, the analysis of TDS concentration from EC value can be used to give an overview of water quality. For more precision, TDS concentrations need to be analyzed using the gravimetric method in the laboratory.
You Li et al 2021 IOP Conf. Ser.: Earth Environ. Sci. 631 012006
Plastics have been produced and used by humans in large quantities since they were invented, and the resulting environmental pollution problems have become more and more serious. In recent years, researchers have found that many plastic products are not completely decomposed after being discarded, a lot of plastics form microplastics in the ocean, which poses a threat to the survival of marine life. This paper analyzes the source, types and distribution of marine microplastics, and explores the influence of microplastics on marine life.
Kehinde Adeseye Adeyeye et al 2021 IOP Conf. Ser.: Earth Environ. Sci. 801 012020
In this paper, we examine existing literature on the way that the number of blades of a wind turbine affects its efficiency and power generation. A wind turbine blade is an important component of a clean energy system because of its ability to capture energy from the wind. The power that a wind turbine extracts from the wind is directly proportional to the swept area of the blades; consequently, the blades have a direct effect on power generation. The number and configuration of the blades is very important because it affects the speed and efficiency of turbine. Unfortunately, as the number of blades increases, so does the slipstream effect. Too few a number of blades results in poor efficiency and thus inadequate performance. Too large a number of blades increases weight and production cost. The correct number of blades is important to fit the generator performance curve to optimize overall turbine performance and efficiency.
Hoa-Hung Lam et al 2021 IOP Conf. Ser.: Earth Environ. Sci. 947 012041
In the present work, the phenol-sulfuric acid method and the 3,5-dinitrosalicylic acid (DNS) method were developed with the aim to quantitatively analyze total sugars and reducing sugars, respectively. In regard with the phenol-sulfuric acid assay, 1.0 mL of sample was treated with 1.0 mL of 5% phenol, 5.0 mL of concentrated H2SO4 and measured at 485 nm, with the linearity range of 10–100 ppm for total sugars. The DNS method was performed on 2.0 mL of sample, using 1.5 mL of DNS at 80 °C for 10 minutes and measured at 510 nm, with the linearity range of 50–400 ppm for reducing sugars. The sugar contents of white dragon fruit-derived sugar-samples (extracted from species in Binh Thuan province, Vietnam) were also estimated by the above measured methods, exhibiting the total sugars of above 90% and the reducing sugars of above 5%. The methods were well-performed with the acceptable relative standard deviations of repeatability in accordance with the Association of Official Analytical Chemists (AOAC).
Shiyong Liu 2021 IOP Conf. Ser.: Earth Environ. Sci. 692 022103
Tesla's rapid rise to become one of the world's most influential automakers has marked the start of a new era in the global automobile industry, where many of the traditional auto companies were overshadowed by Tesla's dominance. Judging from Politics, Economy, Society and Technology perspectives, Tesla's market value can potentially be overvalued due to its leading role in the Electrical vehicle market. Economically, Tesla facilities the growth of global economy by creating more employments and manufacturing factories. Socially and politically, Tesla's Electrical Vehicle reduces the level of negative externalities (e.g., pollution), which aligns with the developmental frameworks proposed by governmental policies and regulations. Meanwhile in technological aspect, Tesla pioneers the innovative design of battery pack to reduce the overall cost of battery and seeks to integrate better automatic driving system into electrical vehicle. Given those merits of Tesla, overoptimism on its stock price is expected. Therefore, it is important for stock traders who are willing to throw money at Tesla to ruminate over their choices before making the investment. In this study, the results of valuation methods indicate that true market value of Tesla has been overestimated due to its irregularly high operating cash flow, price-to-earnings ratio and enterprise value to earnings before interest, taxes, depreciation, and amortization ratio, suggesting its stock price is overvalued.
Ni Putu Ermi Hikmawanti et al 2021 IOP Conf. Ser.: Earth Environ. Sci. 755 012060
Katuk is widely popular with its benefits for breastfeeding mothers. Katuk is also known as a plant with a high antioxidant content. This study aims to determine the effect of using variations in the ethanol concentration as an extracting solvent in producing Total Phenolics Content (TPC) and Total Flavonoids Content (TFC) and their activities in reducing DPPH free radicals. The dried katuk leaves were extracted by cold maceration method. The solvent used for extraction is ethanol with 3 variations in concentration: 50%, 70%, and 96% (absolute ethanol). TPC and TFC were determined by colorimetric method using a UV-Vis spectrophotometer. TPC was stated to be equivalent to gallic acid, while TFC was stated to be equivalent to quercetin. DPPH free radical scavenging activity was measured based on the IC50 value. The results showed that Katuk leaf extract produced from 50% ethanol solvent was able to produce TPC (42.18 ± 0.30 mg GAE / g), TFC (11.18 ± 0.38 mg QE / g) and reduction activity against DPPH radicals (IC50 = 88.33 ± 3.53 ppm). These were higher than ethanol with other concentrations. However, various things need to be considered when using this solvent given the high water content in the solvent.
A S Wijaya 2014 IOP Conf. Ser.: Earth Environ. Sci. 19 012008
Climate change becomes one of the most significant challenges faced by most environmentalist all over the world. Every country either developed or developing one has the same need in climate change impact mitigation and adaptation. However, developed countries are believed to have better ability rather than developing countries in particular to climate change adaptation impact. It is described by several indications pointed out by several practitioners. The methods compare findings in both developing and developed countries. It is analyzing two salient data justified by rational arguments and emphasizing with some justifications then finally summarizing with solutions and recommendations.
Daniel Collin G. Jornales 2023 IOP Conf. Ser.: Earth Environ. Sci. 1199 012029
Through the Stimulus-Organism-Response (SOR) Model, the paper was designed to answer five (5) questions: (a) What are the factors affecting the decision of the Filipinos in buying refrigerators?; (b) What are the reasons that encourage Filipinos to purchase refrigerators?; (c) What is the relationship between energy labels and the purchasing behavior of the Filipinos?; (d) What are the internal and external referents associated in purchasing behavior?; and (e) How do socio-demographics affect the purchasing behavior? SOR explains that several external aspects can act as a stimulus which influences a person's internal state, referring to the organism, which will result to certain behavioral response. The prevailing motivation of consumers rely on their hedonic behavior which attributes with the experiences of sensory appeals including emotion and gratification The study suggests that the consumers lack ample knowledge and capacity to use their familiarity and awareness on the existence of energy labels on making sound decisions when purchasing refrigerators. The importance of energy labels was being set aside by the consumers when being conflicted with the product's brand, features, and aesthetics. Subsequent interventions of government may be necessary in order to address the gap between the consumers purchasing motivation and purchasing behavior. The intensification of information campaign and supporting policies may provide avenue to ensure that consumers are empowered on choosing energy efficient appliances. Furthermore, the development of a comprehensive communication plan that will cut across sector may address the concerns on the appliances acquisition of the Filipinos.
A Iravanian and Sh O Ravari 2020 IOP Conf. Ser.: Earth Environ. Sci. 614 012083
Waste disposal is one of the important problems in the world. In general, wastes are categorized into different groups, and there are some special landfills and methods for disposing of each of these waste materials. However, it should be noted that although there are some rules and regulations that try to reduce the impact of waste disposal, landfills have negative effects on soil, air, water, and natural life. One of the most important sources of pollution in landfills is the leachate that is generated by the decomposition of waste. Leachate can penetrate into the soil and water resources, contaminate them, and can affect human life. Leachate generation has five different phases and each of these phases contains some reactions that have a direct impact on the quality and quantity of leachate. Leachate has four main types of pollution and each of these pollutants can contaminate soil and water resources and be hazardous for aquatic and animals in the soil. In addition, some of these contaminations can enter the food chain and affect the ecosystem and human life. The negative impacts of landfills remain even years after the landfill is closed. Therefore, it is important to consider the short-term and long-term effects of landfills on their surroundings to protect the environment and human health.
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2024 IOP Conf. Ser.: Earth Environ. Sci. 1350 011001
The 4th MSAT Conference "Scaling Up Ocean Action Based on Science and Innovation for the Implementation of the Blue Economy" held in Bandung, West Java, Indonesia on the 26-27th of October 2023 was part of a conference series held biennially since 2017 (https://msat.fitb.itb.ac.id/). The 4th MSAT conference on maritime science and technology targets the United Nations Sustainable Development Goals (SDGs), specifically the SDGs no 13 and 14 (Climate Action and Life below water), as well as no. 1 (No Poverty), no. 2 (Zero Hunger), and no. 7 (Affordable and Clean Energy) through the maritime section, especially as our country is the second-largest coastline in the world with 60% of our citizens living in the coastal area. With those goals, MSAT 2023 places a spotlight on the critical role of science and innovation in fostering the blue economy. The conference theme is not only timely but also holds the promise of unlocking new horizons for oceanic prosperity.
The conference builds upon a strong legacy. The 1st MSAT Conference proceeding (Volume 62) was published at IOP on 06 July 2018 (https://iopscience.iop.org/issue/1755-1315/162/1); our second conference proceeding (Volume 618) was published at IOP on 21 December 2020 (https://iopscience.iop.org/issue/1755-1315/618/1); and our third conference proceeding (Volume 925) was published at IOP on 06 December 2021 (https://iopscience.iop.org/issue/1755-1315/925/1). These volumes showcase a wide range of research findings encompassing "Ocean-Atmosphere Dynamics, Marine Hazard and Coastal Degradation, Marine Resources, Conservation and Integrated Coastal Zone Management (ICZM), and Marine Geodesy and Satellite Oceanography" as discussed at the sessions of each conference. These three conference proceedings document the journey of MSAT, and serve as a testament to the commitment of the maritime community to push the boundaries of knowledge and technology. They have not only advanced the field of ocean science but also contributed to the global cause for sustainability.
Following the success of the previous conferences, the 4th MSAT continued the tradition of excellence. Building upon the momentum from the online edition of the 3rd MSAT due to the COVID-19 pandemic, this conference marked a welcome return to an in-person format. However, an online option was still accommodated to ensure wider participation. The conference was jointly organized by the Faculty of Earth Sciences and Technology - Institut Teknologi Bandung, the Marine Technology Cooperation Research Center (MTCRC), and the Indonesian Association of Oceanology (ISOI). It attracted a diverse group of participants, including scientists, students, and stakeholders from Indonesia and abroad. The total number of people who attended the 4th MSAT 2023 was 208 people, consisting of 136 participants, 38 committees, 17 keynote and invited speakers, and 17 moderators.
The first day of the MSAT 2023 conference, held on October 26th, 2023, attracted international participation thanks to its well-regarded speakers from around the globe (Singapore, Malaysia, Spain, Japan, Korea, and Australia). The opening ceremony commenced with welcoming remarks from the Dean of the Faculty of Earth Science and Technology, Prof. Dr. Irwan Meilano, S.T., M.Sc., and Chairman of ISOI, Prof. Dr. Agung Dhamar Syakti. Additionally, a video message was delivered by a representative of the Ministry of Maritime Affairs and Fisheries. Following the opening, Prof. Yoshiyuki Kaneda from the Institute of Education Research and Regional Corporation for Crisis Management Shikoku (IECMS) at Kagawa University, Japan, presented a plenary session lecture. This was succeeded by a talk from Prof. Dr. Irwan Meilano himself, followed by a series of five parallel mini-symposia sessions.
List of Steering Committee, Scientific Committee, Advisory Board, Organizing Committee, Editorial Committee and Photo documentation are available in this Pdf.
E Beliyana and A Tarya 2024 IOP Conf. Ser.: Earth Environ. Sci. 1350 012001
In this manuscript, we investigated the characteristics of marine heatwaves (MHWs) in southern Java and the effect of local (air-sea heat flux) and remote forcing (El Niño–Southern Oscillation/ENSO and Indian Ocean Dipole/IOD) on the formation of MHWs. We utilized remote sensing data from the National Oceanic and Atmospheric Administration Optimum Interpolation Sea Surface Temperature V2.1 dataset and European Centre for Medium-Range Weather Forecasts Interim reanalysis, covering the period 01 January 1982 to 31 December 2021. The datasets were processed by statistical analysis using MATLAB. We found that the most prolonged durations and the highest cumulative intensities of MHWs in southern Java were recorded during 2016, spanning approximately 255 days and 419.28 °C, respectively. During 2016, the combination of El Niño decay and negative IOD led to optimal warm conditions for long-lasting MHWs and hit southern Java throughout the year. Furthermore, this research highlighted a stronger correlation between ENSO and MHWs in southern Java compared to the IOD, with a 5–8 months lag time. We suggest that long-lasting MHW events may have serious implications for social and ecological systems. Therefore, an in-depth and comprehensive understanding of MHWs due to ongoing climate change becomes an urgent matter to predict such extreme events.
Y S Djamil et al 2024 IOP Conf. Ser.: Earth Environ. Sci. 1350 012003
Trends of present-day sea level anomaly (SLA) in western Maritime Continent based on the combination of global thermal expansion and ocean dynamics (steric/dynamic), simulated by Coupled Global Climate Models (CGCMs) under the Climate Model Intercomparison Project phase-5 and 6 (CMIP5/6), are evaluated by using satellite observation. Trends of SLA based on the steric/dynamic component of sea level underestimate the one observed by the satellite for the interior seas of western Maritime Continent. However, satellite observation is also known to overestimate the rate of sea level rise in this shallow basin. Thus, the actual trends of SLA in this area could be approximated based on its steric/dynamic component simulated by CGCMs such as ACCESS1-0 and MIROC-ESM.
F Amri et al 2024 IOP Conf. Ser.: Earth Environ. Sci. 1350 012005
The vertical turbulent flux, which comprises heat flux and vertical mixing, is one of key processes governing seawater temperature changes in the vertical direction. In this study, the influence of vertical turbulent flux on sea surface temperature (represented by a layer between the free-surface and approximately 20 m depth) in Indonesian seas was diagnosed from an eddy-permitting ocean modeling experiment result. The heat flux, as the sum of the net heat flux at the surface and penetrative shortwave radiation at the base of the surface layer, induced a net cooling tendency in both eastern and western Indonesia (represented by the Java Sea and Banda Sea, respectively). The cooling tendency due to the heat flux was opposed by the warming tendency induced by vertical mixing at the base of the surface layer, preventing excessive heat loss in the surface layer. An exception occurred during the Boreal Autumn in the Banda Sea, when the heat flux and vertical mixing resulted in warming and cooling tendencies, respectively. It was further found that the effect of vertical mixing on the surface layer heat budget was sensitive to the selection of the base layer depth, highlighting the mixing-related dynamic variation within the water column. In summary, this study provides additional insights into the near-surface dynamics that govern sea surface temperature seasonality in Indonesian Seas.
D Nugraha et al 2024 IOP Conf. Ser.: Earth Environ. Sci. 1350 012006
Global Subseasonal-to-Seasonal (S2S) precipitation forecast was known to bridge the gap between weather and seasonal forecast, can be utilized as supporting information for decision-making related to hydrometeorological disaster mitigation activities. However, uncertainty in global models caused forecast performance can be different across regions and time periods. Therefore, it is important to evaluate forecast performance before utilizing the prediction result in any region. In this study, performance of probabilistic precipitation forecast from Multi-model Ensemble (MME) of three models in The North American Multi-Model Ensemble phase 2 (NMME-2) project was evaluated in Indonesia region based on two evaluation metrics: continuous ranked probability score (CRPS) and reliability diagram. The evaluation was conducted during the boreal summer (May–October) and boreal winter (November–April) periods, as well as during the active period of subseasonal climate variability phenomenon Madden-Julian Oscillation (MJO). Our result shows that S2S precipitation forecast from MME of CFSv2, CanCM4 and GEOS5 models are sufficiently accurate and reliable during the boreal summer period for Central Sumatra, Southern Sumatra, Southern Kalimantan, Java, Southern Sulawesi, and Southern Papua regions, with a range of CRPS values between 4-16 mm/7 days and a 'perfect' reliability category. There is no notable distinction in the performance of S2S precipitation forecast between the active and inactive events of the Madden-Julian Oscillation (MJO). The difference in CRPS values between these two periods is only around 0.8-1.2 mm/7 days, and there is no difference in reliability categories across Indonesia as a whole, nor significant spatial pattern differences.