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
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.
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.
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.
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.
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).
Robert Devi Anugrah et al 2021 IOP Conf. Ser.: Earth Environ. Sci. 755 012001
The large demand for cayenne pepper makes farmers need to make efforts to increase crop production by increasing the efficiency of using fertilizers. The alternative fertilizer comes from household waste, namely egg shells. This study aims to determine the effect of eggshell organic fertilizer on vegetative growth of cayenne pepper (Capsicum frutescens L.). The research method used was an experimental method using a completely randomized design (CRD) with 6 treatments and 5 replications. The treatments were P0 (control), P1, P2, P3, P4, and P5 respectively, the treatment of eggshell organic fertilizer with a dose of 0; 45; 60; 75; 90; and 105 g. The treatments were given 3 days after transplanting and harvesting the plants 35 days after transplanting. Data for each parameter was tested for normality, homogeneity test, and analyzed by 1 factor ANOVA. Furthermore, the LSD test was carried out to determine the difference in effect between treatments. The best application of eggshell organic fertilizer was P4 treatment for parameters of root length and plant wet weight, respectively, 20.10 cm and 17.96 g, and P5 treatment for parameters of plant height and plant dry weight, respectively 54.80 cm and 3.00 g. The percentage of root length and wet weight of P4 treatment plants to control were 130.52% and 269.67%, respectively, while the percentage of plant height and dry weight of P5 treatment plants to control were 139.79% and 282.49%, respectively. The application of eggshell organic fertilizer can increase the vegetative growth of cayenne pepper.
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.
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.
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.
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2024 IOP Conf. Ser.: Earth Environ. Sci. 1338 011001
The 6th International Conference on Food and Agriculture (ICoFA)
Introduction of ICoFA 2023
Dear colleagues,
We are glad to announce the release of the 6th International Conference of Food and Agriculture (ICOFA-2023). The ICOFA is an annual conference organized primarily by Politeknik Negeri Jember. This year the theme of our conference is "Enhancing a Sustainable Future For Food and Agriculture's Technology In Saving The Planet"
Surely, we plan to conduct this conference physically and virtually (hybrid). However, due to the new normal working methods based on "Work From Anywhere (WFA)", the 6th ICOFA 2023 was carried out physically and virtually via the Zoom meeting platform. We took this option because this conference was already designated and funded. Keynote and invited speakers were also scheduled for this event. Many delegations and authors requested for this conference to be performed since they needed it to cover their publication and sharing knowledge requirements.
The key directions of the conference covered the discussion of advanced achievements and touched upon the main aspects of agriculture engineering and biotechnology, organic agriculture, animal science related to food, food science and technology, food safety, food security, and sovereignty, IT for agriculture, renewable and novel energy sources, and socioeconomics related to food and agriculture.
The conference was run as planned on 18th - 19th November 2023 and supported by a hybrid event organizer started from 9.00 am to 5.00 pm. The conference model are Plenary session with keynotes (40 minutes for each keynote speech) and participants' presentations (20 minutes for each presentation). A total of 164 participants from Universities, Research Institutes, and also Government Departments attended the conference in over seven countries Ecuador, India, Indonesia, Morocco, China, the United Kingdom, and the United States.
Our honorable speakers were Prof. Dr. Ir. Nanang Dwi Wahyono, M.M from Politeknik Negeri Jember, Indonesia; Prof. Ir. Dyah Maharani, S.Pt., M.P., Ph.D. from Gadjah Mada University, Indonesia; Prof. Dr. Said Ziani from ENSAM Mohammed V University, Morocco; Prof. Benny Tjahjono, B. Eng., M.Sc., Ph.D. from Coventry University, UK; Dr. Nishu Gupta from Norwegian University of Science and Technology (NTNU), Norway; and Dr. Md. Faisal Kabir from CARE Bangladesh.
An amount of 153 full papers was submitted to the 6th ICOFA 2023. After a pre-review on originality and language, the peer review process was arranged by the Editorial Committee, and 74 manuscripts were selected for publication in the IOP Conference Series: Earth and Environmental Science (EES).
We also wish to thank to keynote speaker, invite speakers, presenters and participants, and all authors for their contributions to the 6th ICOFA 2023 and to colleague members of the organizing committee, please accept my deep appreciation for your hard work in ensuring the success of the conference.
Editor-in-Chief, 6th ICOFA 2023
Dr. Ir. Hariadi Subagja, S.Pt., MSi., IPM
List of Scientific Committee the 6th ICOFA 2023, Technical Committee the 6th and Conference Photograph the 6th ICOFA 2023 are available in this pdf.
2024 IOP Conf. Ser.: Earth Environ. Sci. 1338 011002
All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.
• Type of peer review: Single anonymous
• Conference submission management system: Morressier
• Number of submissions received: 94
• Number of submissions sent for review: 79
• Number of submissions accepted: 73
• Acceptance Rate (Submissions Accepted / Submissions Received × 100): 77.66%
• Average number of reviews per paper: 1.99
• Total number of reviewers involved: 11
• Contact person for queries:
Name: Muhammad Yunus, S.Kom., M.Kom.
Affiliation: Politeknik Negeri Jember
Email: m.yunus@polije.ac.id
* means value has been edited
A H H Slamet et al 2024 IOP Conf. Ser.: Earth Environ. Sci. 1338 012001
Milkfish is one of the potential fishery products in Sidoarjo Regency. Sidoarjo District, one of the subdistricts in Sidoarjo Regency, has significant potential for milkfish development due to its 3271.96 ha of land area. Pond suitability analysis is a crucial aspect of supporting the success of milkfish cultivation. Land suitability can be analyzed using Geographic Information Systems (GIS). This research involved two phases: data collection and analysis. The data parameters collected are temperature, pH, DO, phosphate, and salinity. The data analysis employed overlay and scoring methods. The final scoring results were categorized into four classes, including classes S1 (Very Suitable), S2 (Quite Suitable), S3 (Conditionally Suitable), and N (Not Appropriate). Based on analysis of Landsat image data, the pond area in Sidoarjo District reached 2991.03 Ha. The final scoring results showed that the pond area in the S1 category was 1,816.53 Ha (60.73%), then the S2 category was 1174.50 ha (39.29%). Referring to the calculation of the percentage of pond suitability, most of the ponds in Sidoarjo District are very suitable for cultivating milkfish.
S Putra et al 2024 IOP Conf. Ser.: Earth Environ. Sci. 1338 012002
Amorphophallus muelleri (known as "porang" in Indonesia) can be used as a high-value alternative food source and potentially be a glucomannan production source. Due to its limited production, Indonesia has yet to meet the Amorphophallus muelleri (konjac) flour demand. During growth, konjac plants require sufficient fertilization to increase production and yield large tubers. This study aims to determine the appropriate types and doses of manure fertilizers to enhance konjac plant productivity. The research employed a randomized complete block design with ten treatments using sheep, chicken, and cow manure, as well as a control, with doses of 1.5, 1, and 0.5 kg per plant, repeated four times. The results showed that using manure fertilizers significantly affected the growth of konjac plants, including plant height, stem diameter, leaf width, canopy diameter, and yield. The best dry weight results were obtained using chicken manure at 1 kg per plant (61.33 g) and 1.5 kg per plant (47.64 g). Using sheep, cow, and chicken manure increased konjac tuber yield by 94.95%, 93.55%, and 66.96%, respectively.
S Djamila et al 2024 IOP Conf. Ser.: Earth Environ. Sci. 1338 012003
The Marungga tree is a plant that offers numerous benefits. Its leaves can be processed into flour for further processing for various needs. Marungga leaves need to be dried before they can be made into flour. Marungga leaves are sensitive to heat, so high temperature drying should be avoided. Drying in the sun, or at room temperature takes a long time and is unhygienic. To address these issues, a fluidized bed dryer that utilises dry, cold air flow through dehumidification of the air is required. This research aims to design and test the performance of a fluidized bed dryer that uses dry cold air flow. The method used in the research starts from literature study, design, component manufacturing, assembly and performance testing of the dryer. The design results resulted in specifications of the dryer components as follows: dimensions of the drying chamber 500 mm in diameter and 800 mm in height, evaporator, condenser, compressor, blower each 1 HP. The results of the dryer performance test are as follows: dryer air temperature 34.2 °C, relative humidity 54.3%, and dryer air mass rate 0.25 kg/s, with a drying rate of 0.57 kgH2O/s. The evaporator of the cooling system can decrease the absolute humidity of the drying air by 1.6 kgH2O/kg dry air.