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Review of the use of mangrove forests in supporting the socio-economic life of fishing communities

IOP Conference Series: Earth and Environmental science 2020年第1期575卷

作者： Untari R Darma P Betaubun A A Arief PhD. Student on Agricultural System Graduate School Hasanuddin University South Sulawesi Indonesia Department of Agribusiness Faculty of Agriculture Universitas Musamus Papua Indonesia Agribusiness Study Program Faculty of Agriculture Hasanuddin University South Sulawesi Indonesia Department of civil Engineering Faculty of Engineering Universitas Musamus Papua Indonesia Socio Economic of Fisheries Study Program Faculty of Marine Science and Fisheries Hasanuddin University South Sulawesi Indonesia

Mangrove forests have an important function in human life that cannot be replaced by other functions. The existence of mangrove forests has six main functions, namely biological, ecological, physical, social, economic and chemical functions. This article discusses the description of mangrove forest management in meeting the needs of the economic and social functions of the fishing communities on the coast of Merauke Regency, Papua Province, which were reviewed descriptively using relevant literature studies. In terms of economic function, mangrove forests provide economic value for fishing communities because mangrove forests become habitat for crabs, fish and other marine biota that are captured and sold as the main source of family income. In addition, the use of mangrove forests by fishermen on the coast is used as firewood and building materials. The high utilization of mangrove forests by coastal communities that ignores ecological sustainability causes damage to mangrove forests that threatens the sustainability of ecological functions. Damage to mangrove forests in Merauke in the period 2000-2005 was recorded as wide as 2,416 ha while in the 2005-2010 period damage reached 2,233 ha of the total area of the Merauke mangrove forest which reached 216,001.95 Ha or 6.98% of the Merauke forest area. Based on this, the management of mangrove forest utilization needs to get more attention from various parties so that the ecological function of mangrove forests as a condition of sustainable development, especially for fishing communities on the coast, can be realized in Merauke Regency.

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Evaluation of communal wastewater treatment plant based on technical, institutional, and community participation aspects in South Surabaya

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IOP Conference Series: Earth and Environmental science 2019年第1期259卷

作者： E Purnawanti N I Oktavitri D R M Isnadina N Fitriani Environmental Engineering Study Program Department of Biology Faculty of Science and Technology Universitas Airlangga Indonesia

This study aims to discover the obstacles and provide recommendations on the technical and institutional aspects of the chosen communal WWTP. The methods used in this study were field survey and questionnaire. the data were analyzed using quantitative, qualitative, and SWOT analysis. There are 11 out of 13 communal WWTPs that do not work optimally. The technical obstacle encountered in the operation of the chosen communal WWTPs is the huge building capacity that does not meet the criteria of HRT design. The recommendations for the technical problem include lowering the water level and reducing the number of baffles in communal WWTP. The obstacle faced in the operation of chosen communal WWTPs in terms of institutional and community participation aspects is that the maintenance is only known by few people. The recommendation for the aspects of institutional and community participation is for KPP to arrange a socialization on the maintenance of communal WWTP based on its maintenance module.

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Numerical Simulation of Spear Motion as Game Items

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Journal of Physics: Conference Series 2020年第1期1445卷

作者： R R Muhima S Mardi M Hariadi I Puspitasari Informatics Engineering Department ITATS Arief Rachman Hakim 100 Surabaya Indonesia Electrical Engineering Department Sepuluh Nopember Institute of Technology Indonesia Information System Study Program Faculty of Science and Technology Universitas Airlangga Jl. Mulyorejo Surabaya 60115 Indonesia

Game development in 3D is mostly done by characters, items and the environment. Game items such as character weapons modeled in 3D will be the attraction of a game. In this paper, spear motion as a game items is modeled in 3D. Nonlinear Equations Six Degrees of Freedom (6 DOF) are used for mathematical models of spear motion. The parameters studied in the motion model are: geometry, mass and aerodynamics. Spear aerodynamic parameters were analyzed using the Datcom method. Numerical simulation of mathematical models of spear motion with variations in the initial velocity of the throw and the direction of the throw. From the results of numerical simulation, the maximum range R = 131.7 m at the initial velocity V0 = 40 m/s, the direction of throw (angle θ0 = 35 deg, angle 0 = 10 deg, ψ0 = 0 deg). And the maximum height Hmax = 12.18 m is achieved at the initial velocity V0 = 20 m/s, direction of throw (angle θ0 = 35 deg, angle 0 = 40 deg, angle ψ0 = 0 deg).

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Light intensity design as a fishing tool on liftnet, with pulse width modulation system based on microcontroller

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Journal of Physics: Conference Series 2020年第5期1477卷

作者： Sumardi Sugeng Hari Wisudo Wazir Mawardi Mulyono S Baskoro Student of Marine Fisheries Technology Study Program IPB Postgraduate School Indonesia. Electrical Engineering Study Programs. Faculty of Engineering Tangerang Muhammadiah University. Tangerang Banten Indonesia. Department of Fisheries Resources Utilization Faculty of Fisheries and Marine Science IPB University Dramaga Campus. Bogor 16680 West Java Indonesia.

Fishing can be done in various ways, including by utilizing lights as fishing tools. The lights used for fishing tools are varied, ranging from torch lights, pressure paraffin lamp, fluorescent lamps (TL, PL, SL, CFL), mercury, and various types of led. However, light transition between one colors to another often scares the fish, driving them out of catchable area shocked by the color change. One solution to address this problem is by smoothly switching the color of the lamp using Pulse Width Modulation (PWM) system on the microcontroller. The color used are the lamp with basic colors of red, green and blue. With power capacity of 50Watt/12Volt, this lamp is classified as High Power Led (HPL) lamp. The light can be free- adjusted, where each lamp can be turned on by its own light or can also be turned on in combination. It can slowly be switch on from an off position to maximum and also can be dimmed from maximum to off. Thus the intensity of the light can be controlled. The HPL and control sections were created separately. Tools and materials used are consist of push-button, microcontroller, optocoupler, mosfet and Red, Green and Blue HPL, Radio-meter (ILT5000 Research Radiometer), Voltmeter, and Amperemeter. The method used was experimental in both laboratory and field. The result of research is in the form of RGB HPL lamp which can be adjusted through control system, such as adjusment for each lamp, or light combination with smooth color transition. Thus, when this technology is applied as fishing tool in liftnet fishing, the targeted fish would still remain on catchable area.

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Distribution mapping of Open Defecation (OD) houses in East Surabaya based on Geographic Information System (GIS)

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IOP Conference Series: Earth and Environmental science 2019年第1期259卷

作者： M Y Purnama T Soedarti N I Oktavitri N Fitriani Study Program of Environmental Engineering Department of Biology Faculty of Science and Technology Universitas Airlangga Surabaya Indonesia

The purpose of this study is to know and locate the distribution of open defecation houses in East Surabaya of Surabaya City, Indonesia. Both of secondary and primary data are required for this research, the secondary data consist of the number of OD houses in East Surabaya and basic map of Surabaya City. Primary data consist of field survey OD houses of legal and illegal status. Mapping is conducted with mapping software based on geographical information system. The result of this research proves that there are 1.083 OD houses in East Surabaya and it is equally distributed throughout East Surabaya. The most OD sub-district (Kelurahan) is Gubeng with approximately 319 houses while the least is Kelurahan Tambaksari with 23 houses.

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The stability of calibration model in measuring and mapping soil organic matter in a dry climatic area

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IOP Conference Series: Earth and Environmental science 2021年第1期824卷

作者： B H Kusumo M H Idris Sukartono Mulyati L E Susilowati L A A Bakti Baharudin Y A Purwanto Bustan Department of Soil Science Faculty of Agriculture University of Mataram JL. Majapahit 62 Mataram Lombok NTB Indonesia Postgraduate Studies University of Mataram JL. Pendidikan 37 Mataram Lombok NTB Indonesia Forestry Study Program Faculty of Agriculture University of Mataram JL. Pendidikan 37 Mataram Lombok NTB Indonesia Department of Mechanical and Biosystem Engineering IPB University Indonesia

The increase of atmospheric CO2 concentration from soil organic matter (SOM) decomposition may contribute to the global warming and climate change. So, sequestering this greenhouse gas into SOM may be used to mitigate climate change. However, tedious procedures in measuring and mapping SOM need to be replaced with a method which works based on the reliability of calibration model developed. This research aimed to test the reliability of the calibration model that was built from a separate soil sample group to be used to measure and map SOM on other validation soil sample group, in the mostly dry climatic area of Kayangan Sub-district, North Lombok Indonesia. For this purpose, 300 soil samples were collected from the area using grid method, which were then dried, ground, sieved, analysed for SOM content using the Walkley and Black method, and scanned using Near Infrared Spectroscopy. The model built using calibration sample group was able to reliably measure and map the SOM content of the spectral data collected from the validation sample set. This is shown by the coefficient of determination (R2V = 0.79), root mean square error (RMSEV = 0.246%) and the ratio prediction to deviation (RPDV = 2.09). SOM maps generated from both laboratory and near infrared method can show very low, low and medium SOM content. These maps can be further used as a reference for applying organic fertilizers, avoiding excessive use of fertilizers, and monitoring soil carbon sequestration in mitigating climate change.

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Analysis A parallel combination between the Number Theorists aRe Us, Riverst Shamir Adleman and Triple Data Encryption Standard methods for measuring the speed of document security

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Journal of Physics: Conference Series 2019年第1期1230卷

作者： Luken Candawan Hardiaman Hulu William David Sipayung Muhammad Hafis Christnatalis Informatics Engineering Study Program Deparment of Technology and Computer Science Universitas Prima Indonesia Medan Indonesia

Computer security is a very important thing in an information system. The strength of the NTRU algorithm is the difficulty of finding a short vector of a lattice (a discrete subgroup of a collection of vectors that includes the entire vector environment) of a random polynomial that has a large degree. The strength of the RSA algorithm lies in the level of difficulty in factoring non-prime numbers into the primary factor. As long as no efficient algorithm has been found to find the prime factors of large integers, the RSA algorithm is highly recommended for message encryption. And finally this is the TRIPEL DES algorithm designed using a 56-bit key, and that size is enough to run a secure encryption technique. This algorithm provides a simple solution that is running the DES Algorithm 3 times for data blocks. The results of our study of measuring speed on encryption and decryption using the same file are superior to the RSA algorithm compared to the NTRU and TRIPLE DES algorithms.

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Traffic sign detection using histogram of oriented gradients and max margin object detection

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Journal of Physics: Conference Series 2019年第1期1230卷

作者： Reinaldo Natanael Manurung Juara immanuel Simbolon Christnatalis Informatics Engineering Study Program Deparment of Technology and Computer Science Universitas Prima Indonesia Medan Indonesia

Traffic signs are important markers in two-wheeled and four-wheeled vehicles. However, there is a change in direction or arrangement on the road that cannot be opened on a map which can cause incorrect information, which can cause traffic jams. In this journal the author uses a camera mounted on a car that provides a solution for drivers who issue problems that occur on the road that show directions or arrangements that are not directly updated using the HOG and MMOD methods. HOGs and MMODs are methods that can refute objects well, and move images and will be recognized immediately. The information received can be sent directly to an electronic map so that it can be accessed automatically by the driver's information and assistance and other information finds the right path, so that it can help the driver and can avoid traffic jams.

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Perceptions and adaptation strategies of the community against flood risk at the estuary riverbank of Bone River, Gorontalo Province

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IOP Conference Series: Earth and Environmental science 2019年第1期235卷

作者： S Maryati S Eraku M Kasim Geography Education Study Program Department of Earth Science and Engineering Faculty of Mathematics and Natural Sciences Universitas Negeri Gorontalo 96128 Indonesia Engineering Geology Study Program Department of Earth Science and Engineering Faculty of Mathematics and Natural Sciences Universitas Negeri Gorontalo 96128 Indonesia

Indonesia is a country prone to natural disasters that are influenced by natural factors and human factors. Natural disasters that commonly occur in Indonesia are floods, sea tides, landslides, earthquakes, volcanic eruptions, hurricanes, and drought. Among these disasters, floods are the most frequent natural disasters in various parts of Indonesia. During 2015 there was 1732 incidence of disasters in Indonesia, 92.67% of the disasters are landslides, tornado, and flood (Indonesian National Disaster Management Agency – BNPB, (2016). Refer to BNPB (2018), during 2017, 979 incidences of flood disaster occurred in Indonesia where 2.518.578 people were affected by the flood disaster. Considering that flood is a common disaster in Indonesia, people should have flood preparedness. This research was conducted at the estuary of Bone River Gorontalo Province. The Bone River is one of the longest rivers in Gorontalo Province that cross Bone Bolango Regency and Gorontalo City. There are many communities are living in river estuaries that belong to densely populated areas, so this research is very important to understand perception and adaptation strategy of society to flood disaster. This research was conducted by distributing questionnaires to the community and analyzed quantitatively. The results show that most respondents know that they live in flood-prone areas, floods can cause various impacts, and floods can be prevented and minimized. The research result is expected to be useful in the decision-making process for decreasing flood disaster risk at the estuary of Bone River Gorontalo Province.

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Experimental evidence of enhancing scientific reasoning through guided inquiry model approach

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AIP Conference Proceedings 2020年第1期2215卷

作者： Erni Yulianti Vita Ria Mustikasari Erti Hamimi Nor Farahwahidah Abdul Rahman Lailatul Fitri Nurjanah 1)Study Program of Science Education Faculty of Mathematics and Natural Sciences Universitas Negeri Malang Jl. Semarang 5 Malang 65145 Indonesia 2)Center for Engineering Education Universiti Teknologi Malaysia 81310 Skudai Johor Malaysia

As far as the fast-growing world of science education is concerned, the goal of teaching is not merely how to make students understand the key concepts in science, but it is also to prepare students to accomplish the prerequisite of higher order thinking skills, i.e. scientific reasoning. It covers problem-skill and reasoning abilities, from gathering to revising hypothesis, as the manifestation of knowledge change and knowledge achievement processes obtained by inquiry activities. Therefore, studies on exploring students’ scientific reasoning have magnetized experts in science education. Herein, guided inquiry model was conveyed to investigate the scientific reasoning of students in junior high school on the topic of pressure. The model was implemented for three consecutive meetings. The analysis was based on the students’ answers on 10 two-tier multiple choice questions and the questions comprised of 7 scientific reasoning indicators. After implementing the guided inquiry model and conducting the pretests and posttests in the classroom with 32 students, some important findings are found as follows: (1) increased scores of students’ tests are observed for each scientific reasoning indicator and each question and (2) every syntax of the guided inquiry provides an uplift to students’ scientific reasoning ability. The detailed evaluation of each two-tier question and indicator is described in this present paper.

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