scholarly journals Rancang Bangun Remotely Operated Vehicle (ROV) untuk Monitoring Kondisi Terumbu Karang di Perairan Bontang

2021 ◽  
Vol 4 (2) ◽  
pp. 149-157
Author(s):  
Musa Payung ◽  
Abdul Zain
Keyword(s):  
Coral Reefs ◽  
Natural Resources ◽  
Control Device ◽  
Test Results ◽  
Remotely Operated Vehicle ◽  
Video System ◽  
East Kalimantan

Coral reefs and all the life in them are one of the natural resources owned by the Indonesian people that are invaluable. Bontang city, located in East Kalimantan, is dominated by the ocean. Observation of the condition of coral reefs has been carried out by diving (diving) or snorkeling. For certain conditions, such as difficult locations, it does not allow humans to dive and observe directly the condition of coral reefs. This study proposes an alternative observation of coral reefs in Bontang waters using ROV. ROV is an underwater explorer robot controlled by an operator with a control device. The ROV in this study uses the arduino mega2560 as a controller, the BTS7960 module as a motor driver, MS5540CM sensor, motor as a driver. The ROV is equipped with a camera to take pictures and display them on a monitor. The results show that the ROV can work in the water, the ROV movement can be controlled and can maneuver well. ROV can automatically maintain depth when not operated with a range of ± 5 cm. The camera video system works well. The image captured by the camera can be displayed on the monitor in realtime. From the test results, it was found that the delay was less than 1 second between the image captured by the camera and the image displayed.

Paradoks Desentralisasi dan Kesejahteraan: Kalimantan Timur Kaya Tapi Miskin

2012 ◽  
Vol 10 (1) ◽  
pp. 17-38 ◽  
Author(s):  
Muhammad Ali Hapsah ◽  
Wawan Mas’udi
Keyword(s):  
Human Resources ◽  
Natural Resources ◽  
Central Government ◽  
Economic Potential ◽  
Regional Autonomy ◽  
East Kalimantan ◽  
Fiscal Decentralisation ◽  
The Rich ◽  
New System ◽  
Regional Governments

East Kalimantan is a province full of paradoxes. This region has considerable economic potential measured in terms of its abundant endowments of natural resources, including oil, natural gas, gold, coal and forestry. Yet, East Kalimantan still lacks infrastructure, has poor human resources and high levels of unemployment, factors that condemn much of the population to a life of poverty and hardship. The new system of regional autonomy, which has been implemented since 2001, was expected to give more benefit to the regions, as regional governments have held relatively more power and fiscal capacity. Law 22/1999, which has been revised twice, has provided more authority to regional governments to manage their respective regions. The introduction of fiscal decentralisation through Law 25/1999, further revised in Law 33/2004, has favoured regions rich in natural resources such as East Kalimantan. As it has abundant natural resources, this region has received greatly increased funds from the central government due to the implementation of sharing revenue formula generated from the exploitation of natural resources. These supposed to give more opportunities for the rich regions such East Kalimantan to accelerate regional development and bring their people to greater prosperity. Nevertheless, East Kalimantan has realized neither the objectives of regional autonomy nor the community aspirations for a more prosperous society. This paper aims to examine the extent to which regional autonomy laws have impacted people's welfare in East Kalimantan.

Friction-Instability: A New Design Parameter for Brakes

1971 ◽  
Vol 93 (4) ◽  
pp. 1225-1228 ◽  
Author(s):  
W. L. Starkey ◽  
T. G. Foster ◽  
S. M. Marco
Keyword(s):  
Quality Control ◽  
Coefficient Of Friction ◽  
Design Parameter ◽  
Control Device ◽  
Experimental Facility ◽  
Test Results ◽  
Effective Manner ◽  
The Coefficient Of Friction ◽  
Brake Lining ◽  
The Right

A new design parameter, friction-instability, is defined in this paper. Friction-instability is a variation in the coefficient of friction which may occur at any time during the life of a brake lining. A friction-index is defined which measures this variation. A lining which has a high friction index may tend to cause an automobile to swerve either to the right or to the left. A unique experimental facility is described by means of which the friction-instability characteristics of brake linings can be measured. Test results using this facility are presented and interpreted. The friction-index is proposed as a new parameter which should be taken into consideration when brakes are designed and, developed. This index should be particularly useful as a quality control device to insure that machines which use mass-produced braking systems will perform in a safe and effective manner.

scholarly journals DISTRIBUSI SPASIAL, STATUS PEMANFAATAN, DAN UPAYA KONSERVASI PESUT MAHAKAM (Orcaella brevirostris) DI KALIMANTAN TIMUR

2017 ◽  
Vol 15 (1) ◽  
pp. 49
Author(s):  
Dharmadi Dharmadi ◽  
Dede Irving Hartoto ◽  
Syahroma Husni Nasution ◽  
Dian Oktaviani
Keyword(s):  
Natural Resources ◽  
Field Survey ◽  
Survey Methods ◽  
Local People ◽  
Natural Food ◽  
Forest Protection ◽  
Habitat Protection ◽  
East Kalimantan ◽  
Conservation Effort ◽  
Resources Conservation

Penelitian dilakukan pada tahun 2004 - 2006 di Danau Semayang dan Muara Kaman (bagian dari Sungai Mahakam), Kalimantan Timur, melalui survei lapangan dan wawancara langsung dengan nelayan, masyarakat, dan Dinas Perikanan, Dinas Perlindungan Hutan dan Pelestarian Alam. Tujuan penelitian ini adalah untuk mengetahui penyebaran secara spasial, status pemanfaatan, dan upaya konservasi pesut Mahakam (Orcaella brevirostris). Hasil pengamatan menunjukkan bahwa distribusi pesut Mahakam secara spasial terdapat di Muara Kaman, Muara Sungai Pela Kecil, muara Sungai Pela Besar, Danau Semayang, dan Danau Melintang. Pada saat ini, pesut Mahakam di Sungai Mahakam digunakan sebagai wisata air bagi turis domestik maupun luar negeri. Upaya konservasi pesut Mahakan dapat dilakukan melalui perlindungan habitat dari pencemaran dan pendangkalan, perlindungan suaka perikanan yang berfungsi untuk penyedia makanan alami serta meningkatkan peran aktif masyarakat agar turut menjaga kelestarian pesut. This study was conducted during 2004 to 2006 in Semayang and Melintang Lakes, Mahakam segment around Muara Kaman River of East Kalimantan, through field survey methods, and directly interview to respective respondens of fishers, local people, Fisheries Regency Departement and Forest Protection and Natural Resources Conservation. The objective of the study was to elucidate the distribution spasial, utilization status, and conservation effort of freshwater dolphin (Orcaella brevirostris). Results show that the spasial distributions of freshwater dolphin were found in Kaman, Pela Kecil, Bank of Pela Besar Rivers, Semayang, and Melintang Lakes. Freshwater dolphines was used as echotourism for local and foreign tourisms. There are some efforts to conserve of freshwater dolphin in the East Kalimantan, namely habitat protection from pollution and sedimentation, fisheries area protection for providing natural food and to increase local people role in conserving the existence of these animals.

scholarly journals Mechanical Properties and Microstructural Features using Stone Dust as a Partial Replacement of Sand

2019 ◽  
Vol 8 (6) ◽  
pp. 5232-5237
Keyword(s):  
Mechanical Properties ◽  
Economic Growth ◽  
Sustainable Development ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Natural Resources ◽  
Strength Test ◽  
Partial Replacement ◽  
Test Results ◽  
Stone Dust

Today’s world is always leads to development in technology as well as the economic growth though sometime these will affect the environment badly. That’s why world environmental commission coined the termed called sustainable development where development takes place without hampering the others’ needs. Concrete industry is rapidly growing industry in India which consumes lots of natural resources during the production of concrete. Here Stone dust is used as a sustainable material in place of sand partially. M25 grade of concrete has been chosen for the experiments. Different mechanical properties of concrete like compressive strength, Split tensile, flexural strength etc. and Microstructural features like SEM, EDX have been included in this study. Compressive Strength and flexural strength test results shown the increase in the strength. Sulphate Resistance Properties have been tested by curing the cubes in the MgSO4 solution and increase in weight has been observed. Similarities are found in the SEM pictures

scholarly journals Linking Land and Sea through Collaborative Research to Inform Contemporary applications of Traditional Resource Management in Hawai‘i

2018 ◽  
Vol 10 (9) ◽  
pp. 3147 ◽  
Author(s):  
Jade Delevaux ◽  
Kawika Winter ◽  
Stacy Jupiter ◽  
Mehana Blaich-Vaughan ◽  
Kostantinos Stamoulis ◽  
...  
Keyword(s):  
Resource Management ◽  
Coral Reefs ◽  
Natural Resources ◽  
Pacific Islands ◽  
Local Communities ◽  
Lessons Learned ◽  
Coastal Development ◽  
Modeling Framework ◽  
Reef Management ◽  
Management Approaches

Across the Pacific Islands, declining natural resources have contributed to a cultural renaissance of customary ridge-to-reef management approaches. These indigenous and community conserved areas (ICCA) are initiated by local communities to protect natural resources through customary laws. To support these efforts, managers require scientific tools that track land-sea linkages and evaluate how local management scenarios affect coral reefs. We established an interdisciplinary process and modeling framework to inform ridge-to-reef management in Hawai‘i, given increasing coastal development, fishing and climate change related impacts. We applied our framework at opposite ends of the Hawaiian Archipelago, in Hā‘ena and Ka‘ūpūlehu, where local communities have implemented customary resource management approaches through government-recognized processes to perpetuate traditional food systems and cultural practices. We identified coral reefs vulnerable to groundwater-based nutrients and linked them to areas on land, where appropriate management of human-derived nutrients could prevent increases in benthic algae and promote coral recovery from bleaching. Our results demonstrate the value of interdisciplinary collaborations among researchers, managers and community members. We discuss the lessons learned from our culturally-grounded, inclusive research process and highlight critical aspects of collaboration necessary to develop tools that can inform placed-based solutions to local environmental threats and foster coral reef resilience.

Settlement Calculation and Analysis of Ground Improved by Dynamic Compaction at RSGT Project

2012 ◽  
Vol 446-449 ◽  
pp. 1426-1431
Author(s):  
Zhi Guang Qin ◽  
Yan Luo ◽  
Ying Xi He
Keyword(s):  
Saudi Arabia ◽  
Coral Reefs ◽  
Red Sea ◽  
Cohesive Soil ◽  
Dynamic Compaction ◽  
Actual Condition ◽  
Test Results ◽  
Calculation Methods ◽  
Settlement Calculation ◽  
Semi Empirical

Red Sea coral reefs in Saudi Arabia were dredged and reclaimed firstly, and then were treated by dynamic compaction as non-cohesive soil ground. Consolidated condition of improved ground within different depth is in different. Calculating settlements for different state ground should consider actual condition. Several semi-theoretical and semi-empirical settlement calculation methods mainly including Terzaghi’s method(1996), Teng’s method(1969), Meyerhof’s method（1956）are applied and analyzed to investigate the actual condition of improved ground according to the RSGT project test results, and the differences are proposed among these three methods.

scholarly journals Plastic as substituent material for fine aggregate in concrete

2021 ◽  
Vol 309 ◽  
pp. 01132
Author(s):  
Raju Suram ◽  
T. Srinivas ◽  
Vegiraju Naresh kumar Varma
Keyword(s):  
Compressive Strength ◽  
Natural Resources ◽  
Construction Industry ◽  
Polyethylene Terephthalate ◽  
Exponential Growth ◽  
Fine Aggregate ◽  
Test Results ◽  
Surrounding Environment ◽  
Recycled Polyethylene ◽  
Natural Aggregates

The Plastic is a part of our lives due to its daily usage. So, the consumption of plastic is increasing every year. The decomposition of plastic takes more than thousand years because of its non-biodegradable nature. The plastic harms the society and surrounding environment in all aspects. So, the best way to control the pollution posed by the plastic is recycling. The exponential growth in construction industry, the demand for natural aggregates increases but leads to depletion of natural resources. To overcome this issue plastic used as a fine aggregate replacement in concrete. The majority of the waste coming from the plastic bottles (Polyethylene Terephthalate) and food containers (Polypropylene). So, the recycled Polyethylene Terephthalate and Polypropylene used as a fine aggregate in concrete with percentages of 5%,10%,15%. This paper objective is to assess the effect of Polyethylene Terephthalate and Polypropylene on compressive strength and workability. The workability and compressive strength of PET and PP have given good results up to10%and 5%. It has been observed from the test results that 5% and 10% is optimum for Polypropylene (PP) and Polyethylene Terephthalate (PET)as fine aggregate in concrete respectively.

scholarly journals Analysis of Determining Target Accuracy of Rocket Launchers on Xbee-Pro based Wheeled Robots to Realize the Development of Technology on the Military Field

2020 ◽  
Vol 2 (3) ◽  
pp. 114-118
Author(s):  
Anggara Trisna Nugraha ◽  
Dadang Priyambodo
Keyword(s):  
Control System ◽  
Success Rate ◽  
Control Device ◽  
Test Results ◽  
Servo Motor ◽  
Wheeled Robots ◽  
The Military

At this time the rocket launcher is still controlled by humans who utilize technology using a PC and a servo motor as a control device to determine the accuracy at the shooting angle, in designing this robot complete components are needed so that the robot can work automatically according to the input given, the rocket launcher robot controlled automatically by communication from the PC after which the command is forwarded to the microcontroller using a USB TTL cable and sent to the Xbee-pro sender circuit then transmitted and received by the Xbee-pro receiver then transmitted to the microcontroller and processed to the control system on the launcher a rocket in the form of a servo motor and a relay as a component in the firing of the rocket launcher. Based on the test results, the robot has been able to direct the rocket launcher at a predetermined angle and has been able to carry out firing actions on each rocket starting from manual rockets, double rockets, triple rockets and full rockets with a success rate of up to 80%.

scholarly journals Economic Valuation of the Ecosystem Services of the Mesoamerican Reef, and the Allocation and Distribution of these Values

2021 ◽  
Author(s):  
Itziar Ruiz de Gauna ◽  
Anil Markandya ◽  
Laura Onofri ◽  
Francisco (Patxi) Greño ◽  
Javier Warman ◽  
...  
Keyword(s):  
Decision Making ◽  
Coral Reefs ◽  
Natural Resources ◽  
Natural Capital ◽  
Economic Valuation ◽  
Economic Value ◽  
Economic Benefits ◽  
Pharmaceutical Products ◽  
Western Hemisphere ◽  
Barrier Reef

Coral reefs are one of the most diverse and valuable ecosystems on Earth. The Mesoamerican Reef contains the largest barrier reef in the Western Hemisphere. However, its health is threatened, so there is a need for a management and sustainable conservation. Key to this is knowing the economic value of the ecosystem. “Mainstreaming the value of natural capital into policy decision-making is vital” The value of environmental and natural resources reflects what society is willing to pay for a good or service or to conserve natural resources. Conventional economic approaches tended to view value only in terms of the willingness to pay for raw materials and physical products generated for human production and consumption (e.g. fish, mining materials, pharmaceutical products, etc.). As recognition of the potential negative impacts of human activity on the environment became more widespread, economists began to understand that people might also be willing to pay for other reasons beyond the own current use of the service (e.g. to protect coral reefs from degradation or to know that coral reefs will remain intact in the future). As a result of this debate, Total Economic Value (TEV) became the most widely used and commonly accepted framework for classifying economic benefits of ecosystems and for trying to integrate them into decision-making. This report estimates the economic value of the following goods and services provided by the MAR's coral reefs: Tourism & Recreation, Fisheries, Shoreline protection. To our knowledge, the inclusion of non-use values in the economic valuation of the Mesoamerican Barrier Reef System is novel, which makes the study more comprehensive.

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