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Tiku Beach in Tanjung Mutiara District, Agam Regency, West Sumatra is a 12.77 km coastal area experiencing continuous shoreline changes due to abrasion and accretion. This study aims to identify and map shoreline changes and calculate the area of abrasion and accretion in 2014, 2019, and 2024 using the Modified Normalized Difference Water Index (MNDWI) method based on Landsat 8 OLI satellite imagery. The MNDWI method utilizes the reflectance difference in the Green band (Band 3) and SWIR band (Band 6) to automatically separate the land-water boundary. Shoreline change analysis was performed using Net Shoreline Movement (NSM) and End Point Rate (EPR) methods through ArcGIS 10.8 software with the Digital Shoreline Analysis System (DSAS) extension. Analysis of 336 transects shows that accretion is more dominant than abrasion along Tiku Beach. The largest accretion was recorded at transect 230 with an NSM value of 71.3 m and an EPR rate of 7.12 m/year, while extreme abrasion occurred at transect 249 with an NSM value of -121.67 m and an EPR rate of -12.15 m/year. The evolution of the shoreline shows that in 2014 the coastline was still relatively stable, then in 2019 mild abrasion occurred in the west along with accretion in the east, and by 2024 this pattern became more pronounced. The results of this study are expected to serve as a scientific basis for decision-making in coastal disaster mitigation planning and sustainable coastal management in Agam Regency.

This study analyzes the strategy of the Community Monitoring Group (Pokmaswas) in developing mangrove forests in Pelambung Village, Tanjung Balai Karimun, Riau Islands. This study aims to explore Pokmaswas management patterns and their impacts on local communities and coastal ecosystems. Mangrove forests play a crucial role in maintaining ecosystem balance, protecting coasts from abrasion, flooding, and storms, and supporting the biodiversity of fish, shrimp, and crabs. In Indonesia, mangrove area has decreased drastically from 5.2 million hectares in 1982 to around 2.5 million hectares due to land conversion, logging, and pollution. In Pelambung Village, Pokmaswas, established in 2023, began rehabilitation by planting 5,000 mangrove seedlings such as Rhizophora (mangrove), Avicennia (api-api), and Sonneratia. This qualitative, descriptive study, using observation, local community interviews, and documentation techniques, was conducted from July to August 2024. The Community Development Group (Pokmaswas) is active in nursery, harvesting, maintenance, monitoring, and ecotourism development, generating economic benefits (job creation, mangrove coffee MSMEs and miniature canoes), ecological benefits (protection from abrasion, increased fisherman's catch), and biological benefits (marine biota habitat). Challenges include limited funding, pest attacks, and integration with regional development.    

In general, infrastructure development requires materials from nature and one of them is natural coarse aggregate of crushed stone. The rapid development of infrastructure in Indonesia has resulted in the depletion of the natural coarse aggregate. Therefore, other efforts are needed in terms of using coarse aggregate as a construction material. So in this study the aim is to make artificial coarse aggregate made from fly ash. The results showed that this artificial coarse aggregate met the requirements of the General Specifications of Bina Marga 2010 rev 3 as a construction material, namely for an abrasion value of 40% and water absorption of 3%. In this study, 5 types of comparisons were carried out, namely, 70:30%, 60:40%, 50:50%, 40:60%, 30:70 and for the type of composition comparison 70:30% (70% fly ash:30% cement). ) the abrasion value is still below 40%, and the amount of water absorption is below 3% so that this artificial coarse aggregate still meets the standard specifications of General Highways 2010 rev 3. Based on the price comparison that has been made between artificial coarse aggregate and natural coarse aggregate of crushed stone , shows a price disparity of Rp. 35,779 - Rp. 58,779. Thus, this artificial coarse aggregate is one solution that can be developed to reduce the environmental impact due to the presence of fly ash which is quite abundant in Indonesia.

This study aims to analyze how internal strategies and external challenges can influence the achievement of Regional Original Revenue targets at the Laboratory Technical Implementation Unit (UPTD) of the Public Works and Public Housing Agency (Dinas Pekerjaan Umum dan Perumahan Rakyat) of Cilacap Regency. The research object is the performance of the Laboratory Technical Implementation Unit (UPTD), a technical unit providing construction material testing services, which directly contributes to Regional Original Revenue in Cilacap Regency. The qualitative approach employed a case study method, and data collection techniques included interviews, observation, and documentation. The sample in this study was obtained purposively. The results indicate that internal strategies focused on superior testing methods such as core drilling, abrasion, and concrete compressive strength have been conducted. However, limited equipment, human resources, and the lack of accreditation are major obstacles. On the other hand, external challenges include the lack of updated Regional Regulation tariff regulations, the absence of formal obligations for the use of laboratory services for regional budget projects, and a saturated local market. These findings provide important implications for the Laboratory Technical Implementation Unit (UPTD) in emphasizing policy revisions, increasing internal capacity, and strengthening inter-agency coordination to increase Regional Original Revenue realization.

Pedada leaves (Sonneratia caseolaris), a type of mangrove plant that grows in tropical and subtropical coastal areas, have high ecological and pharmacological value. In addition to functioning as coastal protection from abrasion and seawater intrusion, this plant is also known to contain various secondary metabolite compounds such as flavonoids, tannins, saponins, and alkaloids. These compounds have been widely reported to have important biological activities, one of which is as an antimicrobial agent. This study aims to identify the effectiveness of pedada leaf ethanol extract in inhibiting the growth of pathogenic microorganisms, especially bacteria that cause infections. The extraction process was carried out using 96% ethanol solvent through the maceration method, namely soaking the material in the solvent for a certain time to optimally obtain active compounds. The obtained extract was then tested for its antimicrobial activity using the disc diffusion method against test bacteria, both Gram-positive and Gram-negative. The inhibition zone formed around the disc was measured as an indicator of the antibacterial effectiveness of the extract. The results showed that pedada leaf extract was able to produce inhibition zones with varying diameters depending on the concentration used. The higher the extract concentration, the larger the diameter of the inhibition zone formed. This indicates a positive relationship between extract concentration and its antibacterial strength. This activity is believed to originate from the ability of compounds such as flavonoids and tannins to damage bacterial cell walls or disrupt microbial metabolic processes. This study provides initial evidence that pedada leaves have potential as an environmentally friendly and sustainable source of natural antibacterials. This potential is highly relevant in efforts to develop alternative antibacterial materials based on local plants, especially amidst increasing bacterial resistance to synthetic antibiotics.

The sea fence in Tangerang Regency, Banten, has become a complex issue involving violations of spatial law, environmental impacts, and the rights of coastal communities. This research analyzes the social and environmental impacts of the case and examines the protection and restoration of victims' rights based on a greenvictimology perspective. Using an empirical juridical approach, data collection was conducted through interviews with fishermen and legal aid organizations, as well as secondary data from legal literature. The results showed that sea fences disrupt fishermen's activities, damage marine ecosystems, and violate regional spatial regulations. Ecological impacts include changes in ocean currents, decreased water quality, disruption of fish migration, damage to coral reefs, and coastal abrasion. Protection and restoration of victims' rights in the Pagar Laut case to date have not been fully fulfilled and realized by the responsible parties. This can be seen from the absence of concrete policies and concrete actions in the form of providing compensation or compensation to fishermen who are directly affected by the installation of the Sea Fence which hampers their access and space for fishing activities. In addition, efforts to restore the marine environment have also not been carried out optimally, especially in terms of dismantling sea fences that have not been carried out thoroughly and assistance programs from the Ministry of Maritime Affairs and Fisheries have not been implemented.

Coastal areas are transitional areas between land and marine ecosystems that are very vulnerable to natural disasters, one of which is abrasion. Coastal abrasion is the process of erosion of coastal areas caused by wave activity, ocean currents, and human activities such as infrastructure development and sand mining. Ciberi Beach (Tanjung Ciberi) located in Enggros Village, Abepura District, Jayapura City, is one of the coastal areas that experiences continuous abrasion. Its strategic location and direct facing the Pacific Ocean makes this area very vulnerable to coastal erosion. Based on the author's experience while conducting Field Work Practices at the Papua River Basin Center (BWS Papua), it is known that abrasion has caused damage to public facilities and significant coastline decline since 2019 (Cepos, 2024). Strong suspicions arose from the community based on the results of interviews conducted that the construction of the Youtefa Bridge contributed to the acceleration of abrasion. Previous research also showed that the rate of abrasion in the Yos Sudarso Bay area, including Ciberi Beach, reached 0.89 meters per year. Therefore, this study aims to analyze the level of damage to Ciberi Beach due to abrasion during the period 2014–2024, and to provide recommendations for handling to reduce the impact of damage in the coastal area.

The mangrove ecosystem is an ecosystem that has a very high ecological value. This ecosystem can protect the coastline from abrasion, serve as a habitat for various marine biota, and store a vast biodiversity. The purpose of this research is to analyze the potential of the mangrove ecosystem in Bagan Serdang Village, Pantai Labu District, and to identify the challenges of utilizing the mangrove ecosystem in Bagan Serdang Village, Pantai Labu District. This study uses a qualitative descriptive method by conducting direct observations, interviews, and documentation. The results of this research indicate that the mangrove potential in Bagan Serdang Village is quite good; however, the community has not fully understood the benefits of the mangrove forest due to limited knowledge, community awareness, and the lack of training and outreach provided by the local government and related agencies.

This article examines the management of marine tourism in Lanjukang Island, a tourist destination located in the Spermonde Islands, Makassar City, South Sulawesi, with a focus on the role of maritime diplomacy in increasing tourism potential while preserving marine resources. This research uses a qualitative approach with literature study methods and interviews with relevant parties, such as local governments and local communities. Lanjukang Island, with its beautiful underwater nature and beaches, faces challenges in the form of coral reef damage due to destructive fishing practices and coastal abrasion processes. Nevertheless, Lanjukang Island remains an attractive tourist destination for domestic and foreign tourists. The Makassar City Government plays an active role in promoting marine tourism through international collaboration, one of which is through the Makassar International Eight Festival and Forum (F8) event. Maritime diplomacy, which emphasizes international cooperation in marine resource management and tourism, plays a key role in facilitating sustainable tourism development on Lanjukang Island. The research found that while there is great potential in the marine tourism sector, more integrated and sustainable management is needed to support the local economy and the preservation of the marine environment. Collaboration between government, community and international partners is essential to achieve a balance between tourism development and nature conservation.

Handling of dental disease problems requires that it be handled quickly and correctly, but not all teams of dental experts can carry out treatment quickly due to the lack of a team of dental experts who are in the workplace or hospital 24 hours a day.  Apart from that, the public also has very little knowledge of information about dental disease, so that to treat dental disease, people have to consult a dentist. To classify images of dental disease, feature extraction is needed. Feature extraction is taking characteristics of an object that can describe the image. One example of image feature extraction used is Red, Green, Blue (RGB). This feature extraction is often used to identify or classify an image. Dental image data that will be used in the classification process are tooth abrasion, anterior crosbite, cavities and gingivitis. K-Nears Neigbor is the simplest data mining algorithm.  The aim of this algorithm is to find the results of the closest distance classification for each object.  In determining the distance, the data is initially divided into two parts, namely training data and testing data. After receiving the training data and testing data, the distance from each testing data (Equilidence Distance) to the training data is calculated. The K-Nearest Neighbors method can be applied to classify dental disease based on images of types of dental disease using Matlab software. As a result of the image data training process, 40 image data were input, training results obtained were 100%.

Coastal areas have the potential to prosper the surrounding community. The coastline is the boundary line between land and sea level that is dynamic. Changes in the coastline can lead to abrasion and accretion. This study aims to determine changes in the coastline on the Situbondo coast for a period of 10 years by taking Landsat 8 satellite image data processed using ArcGIS 10.7. The method used in this study uses the calculation of the Haversin formula and Euclidean Distance. The results showed that the smallest shoreline change in Situbondo Regency over a period of 10 years occurred in transect 24, precisely in Agel Village, Jangkar District with a shoreline change rate of 1.11 meters. While the largest 10-year shoreline change in Situbondo Regency occurred in transect 25, precisely in Kumbangsari Village, Jangkar District with a shoreline change rate of 106.42 meters.    

Abortion or the scientific language is Abortus Provocatus, is the method most often used to end an unwanted pregnancy, even though it is the most dangerous method. Abortus Provocatus is divided into two types, namely Abortus Provocatus Therapeuticus and Abortus Provocatus Criminalis. Abortus Provocatus Therapeuticus is an abortion provocatus carried out on the basis of medical considerations and carried out by personnel who have received special education and can act professionally. Meanwhile, Abortus Provocatus Criminalis is an abortion provocatus that is done secretly and usually by personnel who are not specially educated, including pregnant women who want to carry out the abortion provocatus. Abortus Provocatus Criminalis is one of the causes of death of women during their fertile period in developing countries.

The incidence of injuries is increasing every year, both acute wounds and chronic wounds. A recent study in America showed that the prevalence of patients with wounds was 3.50 per 1000 population. The majority of wounds in the world's population are wounds due to surgery/trauma (48.00%), foot ulcers (28.00%), decubitus wounds (21.00%). In 2009, MedMarket Diligence, a wound association in America conducted research on the incidence of wounds in the world based on disease etiology. Data obtained for surgical wounds were 110.30 million cases, trauma wounds 1.60 million cases, abrasions there were 20.40 million cases, burns 10 million cases, decubitus ulcers 8.50 million cases, venous ulcers 12.50 million cases, diabetic ulcers 13.50 million cases, amputations 0.20 million per year, carcinoma 0.60 million per year, melanoma 0.10 million, skin cancer complications there are 0.10 million cases. Injuries that occur in all our daily activities. Abrasions due to falls, injuries from sharp objects such as knives, nails and so on are considered minor injuries.

Tuban Village is one of the villages in Badung Regency that has the potential of coastal areas that are utilized by the community for various purposes. The high utilization of coastal areas has led to the conversion of mangrove land for various purposes, resulting in damage in the form of abrasion in several places, pollution due to industrial activities, households and aquaculture activities. Therefore, mangrove forest rehabilitation program is considered as one of the important recommendations in order to restore the condition of mangrove ecosystem in this region. The training consisted of a group of Nature Lovers Students (Mapala) which included the provision of training and socialization in the field on the introduction of mangrove tree species and characteristics and mangrove tree planting techniques in theory and application of the theory that has been obtained in the form of collecting and processing mangrove trees to be used as seeds and planting practices. The results of the training showed that all participants understood the material presented. This can be seen from the way participants apply the theory obtained by direct practice in the field.

The coastal abrasion disaster that occurred in the Meranti Islands Regency, precisely in the West Rangsang District, Meranti Islands Regency has threatened and brought losses, both in the form of physical and non-physical losses. In 2020, the length of coastal abrasion in Rangsang Barat District will reach 10.75 km2. West Rangsang District is an area located on the coast which has strong wave and wind currents. For this reason, coastal abrasion disasters that occur must be overcome by implementing structural and non-structural mitigation to minimize the risks arising from coastal abrasion disasters that occur. This study aims to look at the implementation of coastal abrasion disaster mitigation and find out the obstacles in mitigating coastal abrasion disasters in Permai Village, Rangsang Barat District. This study uses qualitative research methods with data collection techniques by observation, interviews and documentation. This study has the result that disaster mitigation efforts carried out in Permai Village, Rangsang Barat District have not run optimally. This is due to natural factors and limited budget owned by Permai Village.

The community service program for planting mangrove trees at Tirang Beach, Semarang aims to increase public awareness of the importance of mangrove ecosystems and improve coastal environmental conditions. This program will be implemented through mangrove tree planting activities and counseling regarding the benefits of mangrove ecosystems for the environment. The method that will be used in this program is data collection through surveys to determine the level of public awareness regarding the importance of mangrove ecosystems and coastal environmental conditions. Furthermore, mangrove tree planting activities will be carried out together with the local community, involving experts in the environmental and fisheries fields. In addition, counseling will be carried out regarding the benefits of mangrove ecosystems for the environment, including as a place for various types of fish and wild animals to live, as well as protecting the coast from abrasion. Through this program, it is hoped that people will become more aware of the importance of preserving mangrove ecosystems and protecting the coastal environment. The expected results of this program are increasing public awareness of the importance of protecting the coastal environment and mangrove ecosystems, as well as increasing the number of mangrove trees on Tirang Beach. This program is also expected to be an example for other communities to preserve the environment and encourage the creation of a healthier and more sustainable environment.