Legal Analysis of Iron Sand Mining Conflict in Kulon Progo Regency, Yogyakarta

The facts on the ground show that most mining in Indonesia is carried out using an open pit mining so that it has an impact on environmental damage. This study aims to determine the factors that cause iron sand mining conflicts and develop a concept of iron sand mining conflict resolution in Kulonprogo Regency, Yogyakarta Special Region Province. The research method used is juridical-empirical law research, with a juridical and case approach, which is then analyzed qualitatively. The results in this study are broadly classified as mining conflicts that occurred in Kulon Progo Regency, Yogyakarta Special Region, which can be divided into two, namely nuanced or legal conflicts (legal conflicts) and social conflicts (social conflicts). Then, the conflict resolution was carried out and targeted two things, namely the harmonization of laws and regulations that were related and used directly in the context of iron sand mining in the area. As well as policy making by involving all stake holders (related parties)

POLYPROPYLENE GLYCOLS SURFACTANT AS ADDITIVES DRILLING FLUID FOR INJECTION WELL IN LPLT AND HPHT ENVIRONMENTS

This research is carried out to form a new formulation of drilling fluid for injection well that can be use for both high temperature high pressure (HPHT) and low temperature low pressure (LPLT) environments using non-ionic polypropylene glycol (PPG) based surfactant as an additive. Usually for drilling wells, oil based mud are more favorable to be use because it can increase lubricity, enhance shale inhibition, and has great cleaning abilities with less viscosity. Oil based mud also withstands greater heat without breaking down. But due to its composition, oil based mud cannot decompose easily and often cause environmental issues. Therefore, having water based mud with surfactant additives is a good option to explore the potential of other drilling fluid that can be as efficient as oil based mud. The laboratory work will be carried out to find the application of PPG in drilling fluid in which the focus will be on the improvement of LPLT and HPHT stability of conventional polymer, suspending agent (Xanthan Gum) and filtration reduction agent (PAC-LV) along with the existence of PPG based surfactant. This research will be divided into two stages and two phases in which the two stages are testing the concentration of PPG with and without presence of PAC-LV while the two phases are to determine the best concentration of PPG in mud samples and compare it with PETRONAS fluid bench mark. Rheological and filtration properties of the drilling fluids will be conducted using standard testing apparatus, viscometer and API filter press respectively. It was observed after hot rolling at elevated temperature, mud with 0.57% PPG surfactant still maintaining high viscosity and proved to have lower fluid loss compared to the base mud. Besides, the improvement on the rheology properties was observed due to stabilization of the suspending polymers by the polyglycol system. These results showed that PPG has the potential to be use in LPLT and HPHT drilling environments

Biosorption of Pb (II) ion from aqueous solution by using mandarin orange peel (Citrus reticulata) biomass : Optimization study / Mohammad Shabarudin Sulaiman

Industrialization moves so rapid that the disposal of heavy metals into the environment increases accordingly. Contamination of environmental by Pb (II) ions is a serious problem and this has led to the development of new and improved methods for treating wastewaters since available conventional methods are expensive and inefficient for removal of Pb (II) ions at low concentration. Therefore the studies on the removal of Pb (II) ions from aqueous solution were done on pH, contact time and biosorbent dose. From the studies, it were found that the optimum pH for the removal of Pb (II) ions from aqueous was determined at pH 6 with the highest percentage removal of 96.95% and uptake capacity of 0.4848 mg/g. The result showed that optimum contact time was determined at 30 minutes biosorption process with percentage removal of 97.15% with uptake capacity 0.4858 mg/g. Otherwise, it was found that 1.0 g was the optimum biosorption dose, which give highest percentage removal of 97.06% with uptake capacity 0.8487 mg/g. For biosorption of Pb (II) ions from aqueous solution by pectin-rich fruit materials, Citrus reticulata peels were found to be suitable and effective biosorbent

POLYPROPYLENE GLYCOLS SURFACTANT AS ADDITIVES DRILLING FLUID FOR INJECTION WELL IN LPLT AND HPHT ENVIRONMENTS

This research is carried out to form a new formulation of drilling fluid for injection well that can be use for both high temperature high pressure (HPHT) and low temperature low pressure (LPLT) environments using non-ionic polypropylene glycol (PPG) based surfactant as an additive. Usually for drilling wells, oil based mud are more favorable to be use because it can increase lubricity, enhance shale inhibition, and has great cleaning abilities with less viscosity. Oil based mud also withstands greater heat without breaking down. But due to its composition, oil based mud cannot decompose easily and often cause environmental issues. Therefore, having water based mud with surfactant additives is a good option to explore the potential of other drilling fluid that can be as efficient as oil based mud. The laboratory work will be carried out to find the application of PPG in drilling fluid in which the focus will be on the improvement of LPLT and HPHT stability of conventional polymer, suspending agent (Xanthan Gum) and filtration reduction agent (PAC-LV) along with the existence of PPG based surfactant. This research will be divided into two stages and two phases in which the two stages are testing the concentration of PPG with and without presence of PAC-LV while the two phases are to determine the best concentration of PPG in mud samples and compare it with PETRONAS fluid bench mark. Rheological and filtration properties of the drilling fluids will be conducted using standard testing apparatus, viscometer and API filter press respectively. It was observed after hot rolling at elevated temperature, mud with 0.57% PPG surfactant still maintaining high viscosity and proved to have lower fluid loss compared to the base mud. Besides, the improvement on the rheology properties was observed due to stabilization of the suspending polymers by the polyglycol system. These results showed that PPG has the potential to be use in LPLT and HPHT drilling environments

Simulation of surface crack interaction of marine solid shaft / Noor Elya Nashiewa Shabarudin and Muhammad Hussain Ismail

The marine industry relies on the transmission of power through a propeller shaft, which is typically a solid cylinder. However, when cracks appear in the shaft's hub, it is crucial to take preventative measures to avoid failure. Solid cylinders are susceptible to cracking and fracturing under various mechanical stresses, leading to single or multiple cracks. The interaction between these fractures can significantly impact the structure's collapse, and thus, this study aims to address the issues that emerge from the interaction of multiple cracks under specific loading conditions. To achieve this goal, research on various crack configurations on the cylinder's surface using finite element software, AnsysTM has been conducted to calculate the stress intensity factor (SIF) under different types of loading. The cylinder's dimensions were set to 200 mm in length and 50 mm in diameter, while the crack depth ratio ranged from 0.1 to 0.4, with an increment of 0.1. The crack aspect ratio was set to 0.6. The results were normalized to generalize the interaction factor and the relationship between two cracks and a single crack. It was found that the interaction factor is dependent on the separation distance between the cracks and the crack depth ratio. These findings suggest that preventative measures should be taken to mitigate the risks of crack formation and interaction, such as regular inspections and maintenance

Issues and challenges in the implementation of micro-credential language courses: educators’ perspectives

Micro-credential language courses have gained significant attention in the field of language education due to their potential to offer targeted and flexible learning experiences. However, the successful implementation of these courses relies on understanding the perceptions of language educators and addressing the associated issues and challenges. This study aims to identify language educators’ perceptions of online language learning platforms and micro-credential online language learning platforms and explore the issues and challenges in developing micro-credential language courses. Employing a quantitative approach, data was collected from 30 respondents from language educators at the centre for language learning, in a public university in Malaysia. Through survey questionnaires, quantitative insights into educators’ perceptions and experiences were gathered. The survey questionnaire gathered quantitative data on educators’ perceptions and experiences. This research sheds light on language educators’ perceptions of online language learning platforms and micro-credentials while identifying the challenges inherent in developing such courses. The findings underscore the significance of addressing these challenges to ensure the effective implementation of micro-credential-based language courses within online education contexts

Legal Analysis of Iron Sand Mining Conflict in Kulon Progo Regency, Yogyakarta

The facts on the ground show that most mining in Indonesia is carried out using an open pit mining so that it has an impact on environmental damage. This study aims to determine the factors that cause iron sand mining conflicts and develop a concept of iron sand mining conflict resolution in Kulonprogo Regency, Yogyakarta Special Region Province. The research method used is juridical-empirical law research, with a juridical and case approach, which is then analyzed qualitatively. The results in this study are broadly classified as mining conflicts that occurred in Kulon Progo Regency, Yogyakarta Special Region, which can be divided into two, namely nuanced or legal conflicts (legal conflicts) and social conflicts (social conflicts). Then, the conflict resolution was carried out and targeted two things, namely the harmonization of laws and regulations that were related and used directly in the context of iron sand mining in the area. As well as policy making by involving all stake holders (related parties).</jats:p

Evaluasi Compliance Risk Management (CRM) Dalam Kegiatan Pengawasan Di KPP Pratama Gianyar

The low number of Daftar Sasaran Prioritas Penggalian Potensi (DSP3) which derives from Compliance Risk Management (CRM) (8.47% of the DSP3) at Gianyar Tax Service Office motivates this study to evaluate the use of CRM called CRM Fungsi Pemeriksaan dan Pengawasan (CRM Rikwas) in supervision activities (starting from the planning, implementation, and follow-up stages) at Gianyar Tax Service Office. Evaluation is measured by the criteria of effectiveness at the planning stage of supervision and adequacy at the stage of implementation and follow-up stage of supervision. This study is a case study with an evaluation approach. The research method used is a qualitative method and descriptive analysis. Data was collected by collection of documentation, interviews with the Account Representative (AR) and the Head of the Supervision Section, and questionnaires to the AR. The results of the evaluation with the effectiveness criteria showed that CRM Rikwas suggests effectiveness in the planning stage of supervision. The results of the evaluation with the adequacy criteria indicate that the CRM Rikwas is not adequate in assisting the supervision activities (implementation and follow-up stages) because several indications of non-compliance are not following the actual situation. Based on these findings, this study recommends that AR at the Gianyar Tax Service Office review the non-conforming indicators first and recommends the DGT follow up on those findings

Integrating and retrieving learning analytics data from heterogeneous platforms using ontology alignment: Graph-based approach

This study explores the possibility of integrating and retrieving heterogenous data across platforms by using ontology graph databases to enhance educational insights and enabling advanced data-driven decision-making. Motivated by some of the well-known universities and other Higher Education Institutions ontology, this study improvises the existing entities and introduces new entities in order to tackle a new topic identified from the preliminary interview conducted in the study to cover the study objective. The paper also proposes an innovative ontology, referred to as Student Performance and Course, to enhance resource management and evaluation mechanisms on course, students, and MOOC performance by the faculty. The model solves the issues of data accumulation and their heterogeneity, including the problem of having data in different formats and various semantic similarities, and is suitable for processing large amounts of data in terms of scalability. Thus, it also offers a way to confirm the process of data retrieval that is based on performance assessment with the help of an evaluation matrix