<p>Recent advancements in the synthesis of carbon dots utilizing basic equipment are crucial for their large-scale production. This study explores use household pressure cookers to synthesize from fish waste. A thermocouple and manometer integrated into cooker regulate temperature monitor pressure. Optimization reveals that heating 2000 mL distilled water 100°C requires 20, 30, 32 minutes with power inputs 800 W, 700 600 respectively. The modified achieves optimal at 2.4 bars, 1.7 1.5...

Tombariri Sub-District is located on the North Coast of Minahasa Peninsula, directly opposite Sulawesi Subduction. subduction has potential for earthquakes with a targeted magnitude M8.5 that can generate tsunamis. In addition, fairly large population density and coast. This causes to be highly vulnerable tsunami hazards. study aims determine tsunami's estimated maximum height arrival time. The modeling method in this through Comcot 1.7 application worst-case scenario Subduction M8.5....

Rapid development in coastal areas due to population growth and infrastructure expansion poses the risk of making these vulnerable changes. This situation occurred area Kema District, North Sulawesi Province, Indonesia. has potential for economic growth, primarily through fisheries capture, infrastructure, tourism. However, this should be supported by a preventive effort addressing physical human factors influencing area. The present study try address factors, which aimed determine condition...

This research aims to analyse the role of mangrove ecosystems in reducing tsunami wave impacts on small islands Bunaken National Park. Numerical modelling was conducted simulate propagation under different scenarios, including with and without mangroves, using data tree density, width, coastal bathymetry. Spearman correlation analysis applied evaluate relationship between density width percentage height reduction. Results revealed there a strong positive (r = 0.79, P 0.00036) 0.87, 0.00045)...

Mangrove is one of plants that can grow well on the coast which are affected by tides.Bone Baru village located in North Banggai District, Laut Regency, Central Sulawesi Province has area about 840 ha and mangrove reaching 16.56 ha. This research was conducted from February to April 2020. The purpose this identify types mangroves analyzing structure community include density, relative frequency, coverarge, coverage, importance value index, diversity index. data were analyzed using Microsoft...

Pemanasan global adalah salah satu isu di dunia saat ini, bisa dilihat dengan adanya peristiwa tingginya suhu bumi yang terkait langsung gas-gas rumah kaca. Hutan mangrove dilaporkan mampu memitigasi pemanasan karena kemampuannya menyimpan karbon biomassa dan sedimen baik. Telah dilakukan penelitian untuk mengetahui densitas tanah, presentase organik, estimasi simpanan pada ekosistem Desa Baturapa Kecamatan Lolak Kabupaten Bolaang Mongondow. Pengambilan sampel teknik Purpose Sampling data...

Coastal area of Bitung Municipality is one the economical activities centers in North Sulawesi Province such as for land-uses and exploitation natural resources. Those are exaggerating day bay tended to be uncontrollable. The excess those conditions, it has been recorded change waves waters that impacts coastal areas can affect utilization marine This research was aimed observe altitude variations with Svedrup Munk Bretchsneider (SMB) method had used predict altitudes. results showed wind...

Understanding the dynamics of surface currents in Bangka Strait is crucial for various maritime and coastal activities. This strait connects Likupang, a super-priority tourism destination, with other islands North Sulawesi. These activities include navigation safety, inter-island transportation, fisheries, search rescue operations, marine pollution control. study investigated characteristics using hydrodynamic model called Delft3D. The result revealed that exhibit tidal pattern, dominant...

Bitung is a city with the most intensive marine space utilization activities in North Sulawesi Province. Therefore, information regarding oceanographic conditions very important relation to development this city. One of tides. This study was conducted aim assessing accuracy tidal prediction addition shallow water harmonic constituents and examining amplitude fluctuations main component due constituents. The least squares method used calculate phase constituents, followed by data prediction....

Current is a process of mass transfer seawater that moves from one place to another continuously or occurs continuously. The current generation factor on the surface water caused by two things, namely wind and movement rise fall sea level. Lembeh Strait an Archipelago Port Area hub port in Kawasan Timur Indonesia (KTI), as well area with local transportation routes for community. For this reason, it necessary research obtain information about characteristics patterns currents occur Strait....

Abstract
 The Government of Indonesia has targeted 32.5 million hectares marine conservation areas or 10% the total area ​​Indonesian waters in 2030. location Water Tourism Park Conservation Area North Minahasa Regency been reserved by Sulawesi Provincial through Governor Decree Number 407 2018 covering an ​​25,838.91 hectares. purpose this research is to formulate a strategy for sustainable development Regency. This was conducted 6 months starting from June - December 2022. method used...

The image of an unmanned vehicle (Drone) is image/photo obtained from aerial survey using above the earth's surface at a low altitude and resolution photo very detailed. use drones mapping solution for high level detail because drone images include that can provide more detailed information about mangrove ecosystem, including height trees their area. purpose this study was to compare area with in- situ measurements. method used measuring tree data data. Remote sensing research be concluded...

The study of the perception residents Siau island regarding existence sea turtles was carried out from June to December 2018. survey method and direct observation were applied in data collection. collected then analyzed descriptively. results showed that 88 % are well acquainted with life followed by 80 knew turtles’ status as protected animals through government regulations international conventions. However, proportion involved violating quite worrying survival turtles. For it found 29%...

DOI:10.17014/ijog.9.3.315-327The tsunami early warning system in Bitung does not work optimally, because there is no buoy as a marine equipment for validation before reaching the coastal area. The lack of can be replaced by placing tide gauge on east coast Lembeh Island. To determine optimal location, simple additive weighting (SAW) method was used with three criteria. Those criteria are potential detection, sufficient evacuation time, and an appropriate site installation. Numerical modeling...

Abalone is one of the invertebrates that live in coastal areas, where this area a transitional has dynamic environmental conditions, which can affect activities biota on it. This study aims to determine shell size, gonad maturity, and survival abalone, Haliotis varia, intertidal subtidal zones. Five abalones were placed basket with size 25 X 20 10 cm an opening cavity 1 diameter. was concrete permanent zubtidal The results show pattern increasing length abalone zone from September- November...

This research was conducted in Lirang Village, North Lembeh District, Bitung City by using quadrant and sampling methods. The study 5 quadrants, namely the bottom (quadrant 1), middle 2), top 3), left 4) right 5). Based on calculation results, highest species density relative were found 3 with values of 0.09 87.10, respectively, R. Mucronata. Likewise, same quadrant, frequency value 1.00 Mucronata S. Alba species, while 75.00 closure 15.09, which owned mucronata 1, 89.44 3. important index...

The automatic tsunami detection algorithm needs to be put in the sea level observation system give society a quick warning when happens. This study designs an consisting of three sub-algorithm: spike elimination, gap data filling, and detection. Spike elimination filling are used improve data, which is often disturbed by spikes due electronic factors. was tested using time-series tide gauge that contain waveforms Indonesia from 2007 2019. About 54.52 % 409 have been eliminated while were...

Sejak era 1990anpembangunan di Kota Manado mulai difokuskan wilayah pesisir. Kegiatan reklamasimemberikan dampak terhadap pergerakan massa air terutama kawasan pantai padaskala tertentu. Pemantauan secara berkala kondisi oseanografiskawasan sekitar lahan reklamasi dipandang penting dilakukan untuk mencermatisejauh mana perubahan telah terjadi dengan menentukan arah dan kecepatan arus sertamenganalisis dinamika yang berlaku saat bulan kuartir akhir purnama. Denganmenerapkan metode lagrangian...

The Likupang area, North Sulawesi is one of the super priority tourist destinations launched by Central Government with marine tourism sector as axis. On other hand, potential for natural disasters originating from sea unavoidable so it needs to be considerations in process developing disaster-responsive areas. A tsunami hazard analysis study first step disaster mitigation planning. form modeling identifying worst possible scenario area using COMMIT modeling. able produce parameters such...

Sea Surface Temperature (SST) is the temperature of water measured at sea level. SST a crucial marine parameter that influences weather and climate in Indonesia. The value surface will be very closely related to factors such as depth measurement from level, intensity sunlight received, season, weather, depth, air circulation, cloud cover. This study aims design prototype tool measure wind speed parameters. components used are DS18B20 sensor, JL-FS2 Arduino Mega 2560, SIM900a GSM Module....

Mangrove forest is an ecosystem that lives in coastal areas and has muddy substrates river mouths influenced by seawater it able to live with high salinity ranges. Mangroves absorb CO2 during photosynthesis, then convert into carbohydrates storing biomass in, roots, leaves. This study aimed identify mangrove species, examine the structure of community, analyze importance value index, determine East Ratatotok Village, Southeast Minahasa Regency, North Sulawesi Province. The method used this...

Abstract The chemical elements making up the rocks located on coastal areas in Eastern Bolaang Mongondow were successfully mapped and investigated by employing XRF method. collected from Central Buyat, South Motongkat Jiko of sub-districts milled until size was close to 120 mesh. samples characterized measured obtain deposited inside rocks. It found that which make are relatively different depending locations. silicon (Si) highest percentage all followed iron (Fe), calcium (Ca) aluminum...