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Dyah Nindita Carolina,1,2 Mieke Hemiawati Satari,3,&ast; Bambang Pontjo Priosoeryanto,4,&ast; Agus Susanto,1,&ast; Cortino Sukotjo,5,&ast; Rahmana Emran Kartasasmita6,&ast; 1Department of Periodontology, Dental Faculty, Universitas Padjadjaran, Bandung, West Java, Indonesia; 2Doctoral Study Program, Faculty of Medicine, Universitas Padjadjaran, Bandung, West Java, Indonesia; 3Department of Oral Biology, Dental Faculty, Universitas Padjadjaran, Bandung, West Java, Indonesia; 4Division of Veterinary Pathology, School of Veterinary Medicine & Biomedical Sciences, IPB University, Bogor, West Java, Indonesia; 5Department of Restorative Dentistry, College of Dentistry, University of Illinois at Chicago, Chicago, IL, 60612, USA; 6Research Group of Pharmaceutical Chemistry, School of Pharmacy, Institut Teknologi Bandung, Bandung, 40132, Indonesia&ast;These authors contributed equally to this workCorrespondence: Dyah Nindita Carolina, Department of Periodontology, Dental Faculty, Universitas Padjadjaran, Bandung, West Java, 40132, Indonesia, Tel +628156132636, Email dyah.nindita@unpad.ac.idPurpose: The purpose of this study was to synthesize and structurally characterize four ant nest membranes in four different concentrations and determine the best concentration that could potentially be used as an alternative material for the production of new collagen barrier membranes.Materials and Methods: Membranes were created by mixing ant nest extracts at various concentrations of 0.5%, 1%, 1.5%, and 2%, as well as collagen, chitosan, and Polyvinyl Alcohol (PVA) using a film casting. A Universal Testing Machine (UTM) was used to evaluate mechanical properties including elastic modulus, tensile strength, maximum elongation, elongation at break, and maximum force. Water absorption was performed, FTIR was used for functional group identification, and morphology was examined using SEM. Additionally, EDS was used to identify the composition and distribution of elements in membranes. Statistical analysis was conducted using ANOVA (analysis of variance) and post hoc testing with a significance level of p < 0.01 for quantitative data.Results: The results showed that the mechanical properties produced the following mean (standard deviation): elastic modulus 0.87 Mpa (0.11), tensile strength 16.32 N/mm2 (2.46), maximum elongation 4.96% (1.72), elongation at break 5.23% (1.87), and maximum force 22.50 N (5.06). The average water absorption capacity of all four membranes had a p-value < 0.01. FTIR spectrum showed various peaks corresponding to functional groups, while SEM results indicated a homogeneous mixture. EDS analysis confirmed that the addition of ant plant extract at 0.5%, 1%, and 1.5% resulted in the presence of elements C, O, and Ca. Meanwhile, membranes prepared with 2% concentration had a different composition, namely C, O, Ca, and Na.Conclusion: Increasing the concentration of ant nest affects the values of the membrane’s mechanical properties parameters, including the elastic modulus (0.87 Mpa), tensile strength (16.32 N/mm2), maximum elongation (4.96%), elongation at break (5.23%), and maximum force (22.50 N). The average membrane absorption of water (p value < 0.01) was also affected. SEM images showed homogeneous mixing, and membrane EDS results consisted of C, O, and Ca composition. However, there was no effect on FTIR functional groups. The anthill membrane with a 1% concentration has the potential to serve as an alternative membrane in guided tissue regeneration.Keywords: ant nest, carp scales, herbs, chitosan, polyvinyl alcohol, PVA

Corn, a crucial food crop in Indonesia, faces significant challenges from pests such as Spodoptera spp., impacting agricultural productivity and industrial applications. This study aimed to study the diversity and attack percentage of Spodoptera spp. on corn plants, along with the employed control techniques. The research was conducted using a survey method through field observation and farmer interviews. The insect sampling was carried out by purposive sampling, while the sampling of plants using the diagonal sampling method was done in three areas that were representative of the West Java province, Indonesia (Sumedang Regency, Cirebon Regency, and Bandung Regency). The results showed that Spodoptera frugiperda or fall armyworm has emerged as a dominant pest in all three areas. The diversity index (H′) of S. frugiperda across the Cirebon Regency, Bandung Regency, and Sumedang Regency was consistently low (

The purpose of this study was to see the effect of adding TiO2 nanoparticles had on the characteristics of bacterial nanocellulose (BNC)-based membranes. Pellicles were created from the pineapple peel waste extract, and to obtain BNC, pellicle was disintegrated in six cycles using high-pressure homogenizer at 150 bar. The concentrations of TiO2 nanoparticles in the membrane reinforcement solution were 0.5, 1.0, 1.5, 2.0, and 2.5 wt.%. They were sonicated and dried in an oven at 60°C for 8 h. X-ray diffraction, Fourier transform infrared spectroscopy, roughness test, mechanical properties, and scanning electron microscopy were investigated to explore its claims. The results revealed that diffraction pattern of BNC/TiO2 membrane has a new peak at 25.05° that ensures the presence of TiO2 nanoparticles as well as diffraction peak occurred at 22.49°, which indicates the presence of cellulose Iβ. Moreover, the addition of TiO2 nanoparticles until 1.5 wt.%, the crystallinity index is relatively same and the optimum strength of 99.5 MPa was attained. Further, improvement in addition of TiO2 nanoparticle at 2 wt.% showed a decline in crystallinity index as 80.16% to 74.72% at 2.5 wt.%. The morphology of the membrane surface revealed that TiO2 nanoparticles were still agglomerated and not equally distributed across the BNC membrane, leading to increase in surface roughness.

The Sunda Strait tsunami in December 2018 damaged coral reef ecosystems in the Banten coastal area, including Badul Island waters. This condition potentially affects directly to the trophic level of the reef fish community. The purpose of this study was to determine the trophic level of the reef fish community in the waters of Badul Island after a tsunami. The research was conducted in April 2022 at four sampling stations (North, West, South and East) in the Badul Island waters. Reef fish survey using Underwater Visual Census with a 50 m line transect at a depth of 3 – 5 m. Reef fish identified during the study were grouped based on trophic level (carnivore, planktivore, omnivore, herbivore and corallivore). From this research identify 264 individu with 30 species from 17 Family of reef fish. Small waters area around Badul Island made possible reef fish from 4 sampling stations still in same population. The highest abundance of reef fish was found on the west side of Badul Island (128 ind/250 m2). Number species of reef fish founded the highest in East side with 14 species. The highest abundance of reef fish, based on trophic level, was approximately 74 ind/250 m2 of carnivore fish on the western side of the island.

Bearing capacity is a value used to determine the ability of soil to withstand the pressure and load of a construction. One of the methods to increase bearing capacity of soft clay soil is use geotextile material as reinforcement material. The use of geotextile requires high operational costs, so it needs alternative replacement materials with lower prices and easily available, one of which is woven bamboo. The soft clay soil came from Purwosuman Village, Sidoharjo District, Sragen Regency, Central Java with a planned water content of 60.00% and was saturated. The parameters studied were the effect of depth variation using a footing width ratio of 100 mm (B) there are 0.5B, 1B, 1.5B, and 2B accompanied by the width of reinforcement at each depth variation based on the theory of pressure distribution in the soil 2 Vertical: 1 Horizontal. This study conducted physical properties of soil and loading frame testing. Based on the test, the maximum load retained by the soil with reinforcement is greater than the soil without reinforcement by 2455.71%. From the results of the analyses reviewed, the greater the dimension of the reinforcement width, the greater the maximum load value that will be able to withstand.

The need for quicklime has led to increased utilization of used oil as a substitute for fuel in its combustion process. Mahaka Lime Factory produces SO2 and NOX, which are emitted through the chimney and proportional to lime burning. Therefore, it is necessary to monitor the distribution of the emission concentration in the ambient air. One of the methods used to facilitate the monitoring process to ensure it is kept below the quality standard is dispersion modeling. This is an analytical model processed with the help of AERMOD software and the Gaussian equation. The SO2 concentrations of 0.001 mg/m3 and 0.001 mg/m3, as well as NOX of 0.027 mg/m3 and 0.044 mg/m3 obtained from the calculation, were below the applicable quality standard. Furthermore, emission concentrations directly observed were more significant than the Gaussian modeling results due to the presence of other pollutants around the factory. In conclusion, the dispersion modeling using AERMOD software showed that the largest and lowest distribution of emission concentrations are in the cliff area around the emission source and on the ground surface close to the chimney.

Concrete is a material that is often used in construction in Indonesia. Concrete has the disadvantage that it tends to form cracks. The cracks that form start from small cracks and then enlarge, causing a decrease in quality. Self-healing concrete is a type of concrete that could repair itself with the help of healing agents in the form of bacteria. There are several methods of mixing bacteria into concrete, one of which is by mixing bacteria directly or using a shell which is often called encapsulation. The purpose of this study was to analyze the behavior of the addition of Bacillus Megaterium bacterial encapsulation in terms of compressive strength of concrete with encapsulation proportions of 0%, 2% and 4% by volume weight and using alginate-based shells. The samples used were 15 x 30 cm cylindrical specimens. These specimens were then tested after 7 days and 28 days. Based on test result, it was found that the highest compressive strength was obtained when 2% alginate capsules were added on day 7 and day 28, namely 25.6 MPa and 32.2 MPa. Concrete begun to heal after 2 weeks of curing based on visual observation.

Teachers' learning leadership is one of important facets to students' quality of independent learning. This should be well constructed by sustainable action and transformational of change. The aims of this research are: 1) to measure how valid and reliable both sustainable action and transformation of change are in the construction of learning leadership model and 2) how learning leadership correlates to independent learning. This is a case study which applies quantitative descriptive method. The data were collected by using a 5-Likert scale questionnaire comprises the indicators of sustainable action, transformation of change and independent learning. This questionnaire was distributed to 59 Elementary teachers of three areas in West Jakarta, Indonesia. The data were analyzed by using SEM PLS and statistical analysis of regression. The findings revealed that both sustainable action and transformational of change were valid and reliable in the construction of learning leadership model. Besides, the analysis of regression showed that learning leadership was significantly correlated to independent learning.

Digital history-based project-based learning (PjBL) in history learning is a learning medium that can provide a special attraction for students who can improve historical concept skills and historical awareness. However, there are still many teachers who have not used it, so it is very important to study it. This research aims to analyze the influence of the digital history based PjBL model in improving historical concept skills and historical awareness. The method used is quasi-experimental with two classes, experimental and control. The population used class XI high school students in Lampung, Indonesia and the sample size was 213. Cluster random sampling was used to determine sampling, while data collection was in the form of test instruments. The test instrument questions were analyzed using the gain score and Kruskal-Walli's test to determine the increase in historical concept skills and historical awareness with the help of statistical package for the social sciences (SPSS) 26. The research results confirmed that digital history based PjBL was effective in increasing historical concept skills and historical awareness with a high score, making it the best choice to overcome obstacles in history learning.

Global creativity indices in developing countries tend to be low. In the field of education, creativity has an important role. Efforts to increase the creativity of educational human resources continue to be hyped. Creative teachers produce creative students. But, the fact is that teachers in developing countries tend to need more creativity in teaching. This study aims to analyze the influence of organizational climate in the school environment and teacher career development on teacher creativity in teaching. The sample of this study was 145 junior high school private teachers in Semarang Regency, Central Java Province, Indonesia. Statistical analysis using PLS-SEM and PLSpredict. The results showed that the school's organizational climate positively affected teacher creativity in teaching. Teacher career development also positively affects teacher creativity in teaching. In addition, teacher career development mediates the influence of school organizational climate and teacher creativity in teaching. The findings could help schools or private educational institutions to understand how organizational climate affects teachers' creativity in teaching. So that it can be used as a guideline for schools or other educational institutions to increase teacher creativity in teaching.

Lecturers' academic careers as professional workers have a different process from other workers. Understanding career insights is important for lecturers in carrying out their profession. this research aims to test the moderating effect of managerial support on the influence of career motivation and self-concept on career insight. this research uses quantitative methods, data collection uses instruments with a 1-5 Likert scale. Respondents were 499 lecturers in Jakarta, Indonesia. The data analysis technique uses SEM PLS. The research results show that career motivation and self concept have a positive effect on lecturers' career insight. meanwhile, managerial support does not have a significant moderating effect on the influence of career motivation and self concept on career insight. this research recommends the need for efforts to increase the role of managerial support in increasing lecturers' career insight. this is an opportunity for further research with different theoretical and methodological aspects.

This research aims to analyze the role of teacher learning agility in supporting the success of Islamic education in Indonesia. Researchers used a survey method distributed via a Google Form questionnaire. The population of this study were elementary, middle school, high school, bachelor's and master's level teachers, and a sample of 517 people was obtained, taken using random sampling techniques with the classification of 150 elementary school teachers, 135 middle school teachers, 148 high school teachers, 85 undergraduate lecturers, and 53 master level lecturers. The data were analyzed descriptively and measured using the analysis of variance (ANOVA) test assisted by the SPSS 22 program. The results of the research show that outstanding educators in Indonesia have high learning agility at work. More than 50% of respondents respond to current developments and apply learning agility in the workplace. Based on job classification, lecturers have higher learning agility with an overall average of above 4.20. Meanwhile, based on gender, women are superior to men in its application. Educators with learning agility display maximum work performance, are able to draw lessons from work experience, adapt to change with full awareness and enthusiasm for learning to improve their skills, knowledge and competence.

This study aims to analyze the responses of Indonesian researchers to the integration of Sustainable Developments Goals (SDGs) into language teaching. The data for the articles were collected using the SPAR-SLR technique and thematic analysis. A total of 1701 articles were analyzed, sourced from 42 language teaching journals classified under SINTA levels 1 to 6. The articles collected were from journals with two issues per year. The findings of this research indicate that Indonesian researchers have not given optimal attention to the integration of SDGs into language teaching. This limitation is primarily due to the lack of awareness and capacity among educators to integrate SDGs into language teaching. The limited integration of SDGs in language teaching corresponds with the scarcity of studies on this topic. There is a need to enhance the awareness and capabilities of educators in integrating SDGs into language teaching. Simultaneously, researchers must adopt a scientific inclination in their studies and publications related to the integration of SDGs into language teaching. Collaboration between educators and researchers to improve awareness and capacity is recommended as part of the effort to achieve educational quality, in line with the goals of the SDGs, through language teaching.

Technological developments in various fields are the key to progress in the digital era. The utilization of technology-based learning media in education makes learning more interactive and supports independent learning. This study aims to develop and test the practicality and effectiveness of storyline-based nervous system e-comics media to support students' independent learning. This research uses the Research and Development (RnD) method with the Lee & Owen model, consisting of the analysis, design, development, implementation, and evaluation stages. The research was conducted with the subjects in this study, class XI MIPA SMA Negeri 2 Malang students, totalling 60 people. A pre-experimental design of one group pretest-posttest was used to test the effectiveness of the media. Data were collected through questionnaires and tests. The media validation results obtained 100%, material validation 100%, and student response results 98.7% in the class trial. The effectiveness test used a Pretest-Posttest Control Group Design. The results showed a significant difference between the posttest of both classes with Sig. (2-tailed) 0.00 <0.05, there is a significant difference between the control and experimental classes. Storylinebased nerve e-comic media can facilitate independent learning more interestingly and interactively.

Education in the 21st century has experienced many advances that are adjusted to the demands of the times. Thinking skills are in high demand in the 21st century, especially critical thinking and creative thinking skills for students. This study aims to determine the effectiveness of POPBL model learning in improving critical and creative thinking skills of high school students. This type of quasi-experimental research was carried out with a nonequivalent control group design. The population of this study was students of class XI MIPA SMAN 1 Cluring with two classes XI MIPA 1 and XI MIPA 2 as samples. The data collection method is in the form of tests of critical thinking skills and creative thinking. The data analysis used is an analysis of covariance test. The results showed that POPBL was effective in improving the critical thinking and creative thinking skills of SMAN 1 Cluring students. The implementation of POPBL learning shows interaction between students at work as well.

This research aims to explore the paradigm of applying learning by doing to create active learning in Islamic education. A combination of both quantitative and qualitative methods was used in this study. Data collection begins with qualitative data and continues with quantitative data. This flow is also known as exploratory sequential design. The study's findings indicate that the use of learning by doing in Islamic education creates a supportive and adaptable learning environment where students can develop their critical thinking, collaboration and communication skills through firsthand experience and other people's teachings. Second, learning by doing has a positive influence on students in Islamic education. The findings of the quantitative data analysis in the test (paired sample t-test) demonstrate a substantial difference between the results before and after implementing learning by doing performance-based learning. The degrees of freedom (dk), the magnitude of which is N-1 as well as 40-1 = 39 are the basis for determining the value of the t-table. The value of degrees of freedom 39 at a significant level of 5% is obtained by t-table 1.684. The results can be obtained with a count greater than the t-table namely 16,701 > 1,684and Sig. (2-tailed) = 0.000 < 0.05 based on the results of the analysis of the t-test (paired sample t-test). So, it can be concluded that learning by doing can improve the ability to think creatively, logically, systematically and critically.

Reversibility thinking carried out mentally in mathematical operations has an important role in the process of understanding concepts as it involves developing a thinking process from beginning to end and from end to beginning. This qualitative research aims to describe students' reversible thinking processes in solving algebra problems, specifically in climbertype adversity quotient. A total of 2 students who have the climber type were selected as participants from 36 potential subjects involved in the research. Data collection was carried out by providing Adversity Response Profile questionnaires, Test of Thinking Reversible, and semi-structured interviews. Our participants solved problems according to polya stages and through forward and reverse processes. The results of data analysis show that in the forward process, there are 2 aspects of reversible thinking, namely negation and reciprocity, while in the reverse process, they involve 2 aspects of reversible thinking, namely the capability to return to initial data after obtaining the result and negation. The results suggest that student's ability to perform mental reversals indicates a strong reversible thought process, leading to more precise cognitive thinking.

Monitoring workers’ exposure to occupational noise is essential, especially in industrial areas, to protect their health. Therefore, it is necessary to collect information on noise emitted by machines in industries. This research aims to map the noise from mechanized mineral ore industry using the kriging interpolation method, and ArcGIS 10.5.1 to spatially process and analyze data. The experimental calculation result of the semivariogram showed a 0.83 range value, with an essential parameter of 1.75 sill and a spherical total theoretical model. The result shows that the main machines with the highest power consumption and the Leq value are located in the southwest position of the sampled areas with a noise map-projected to assess the workers’ noise exposure level. In conclusion, the study found that the highest noise level was generated ranged from 88 to 97 dBA and contributed to the whole sound pressure level at certain positions.

Drinking water is a necessity for all living organisms and should be of good quality and free from hazardous contaminants. Chemical agents such as nitrate, nitrite, selenium, chromium, cadmium, manganese, cyanide, and fluoride can contaminate drinking water. Therefore, this study aims to analyze the health risks associated with these chemical agents and their potentially harmful effects on workers. The Environmental Health Risk Analysis (EHRA) method was used to evaluate the chemical agents present in the Concentrating Division area of PT Freeport Indonesia (PTFI). It was discovered that the average concentration values of all chemical agents were below the Environmental Health Quality Standards (EHQS) established in the Minister of Health Regulation Number 2 of 2023. The risk quotient (RQ) results, obtained through the division of intake and reference dose (RfD), were less than 1 (RQ

Work stress can arise from within or from outside the organization, the cause of which is often felt by workers. Work stress is included in occupational diseases and generally comes from the amount or lack of understanding of the work. The purpose of this study is to diagnose work stress on employees in the HSE Department of the Concentrating Division of PT Freeport Indonesia, which is assessed through 6 aspects contained in the Regulation of the Minister of Manpower Number 5 of 2018. Type of research is semi-quantitative, with a cross-sectional research design. The research method uses a survey, and the sampling technique used is a saturated sample. The survey results show that the overall level of work stress on employees is 2.81. This value indicates that the level of work stress felt by employees of the HSE Division is classified as mild, because the score obtained is less than 9. The mean aspect of role ambiguity is 2.73; role conflict 2.76; quantitative work overload 2.75; qualitative work overload 2.87; career development 3; and responsibility towards others 2.74. Based on these values, it can be concluded that each employee of the HSE Department has high accountability from each function as well as the division of personal responsibility to regulate the determination of work priorities and rest periods. However, the majority of employees still feel that there are some tasks that are deemed unnecessary, the existence of high skill expectations from superiors, and the lack of opportunities for promotion or career development within the organization which can be a stressor in the department.

Database merupakan tempat penyimpanan data dan informasi yang harus dijaga keamanan dan kerahasiaannya. Untuk menjaga keamanan dan kerahasiaannya data yang di simpan di dalam database menggunakan kriptografi. Sistem informasi koperasi RIAS merupakan sistem yang memproses data anggota, simpanan dan peminjaman sehingga data yang tersimpan harus terjamin kerahasiaannya. Guna menjaga keamanan data pada sistem informasi koperasi RIAS, menggunakan algoritma kriptografi simetris blowfish. Algoritma kriptografi simetris blowfish merupakan algoritma modern kunci simetris berbentuk cipher blok. Kunci simetris yang digunakan untuk enkripsi dan dekripsi harus sama, sehingga untuk mempermudah proses enkripsi dan dekripsi pada database yang jumlah datanya sangat banyak maka kunci public yang digunakan pada sistem informasi koperasi RIAS dimasukkan kedalam source code. Sistem informasi koperasi rias dibangun menggunakan bahasa pemrograman php dan database menggunakan MySQL