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Journal IOP Conference Series: Earth and Environmental Science

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IOP Conference Series: Earth and Environmental Science, Volume 441; doi:10.1088/1755-1315/441/1/011002

Abstract:All papers published in this volume of IOP Conference Series: Earth and Environmental Science have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.
IOP Conference Series: Earth and Environmental Science, Volume 431; doi:10.1088/1755-1315/431/1/011003

Abstract:All papers published in this volume of IOP Conference Series: Earth and Environmental Science have been peer reviewed through processes administered by the proceedings Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing.
IOP Conference Series: Earth and Environmental Science, Volume 431; doi:10.1088/1755-1315/431/1/011002

Abstract:List of Conference Chairs, Program Chair, International Program Committee are available in this pdf.
S R Pribadi, P D W Sari, S Subekti
IOP Conference Series: Earth and Environmental Science, Volume 441; doi:10.1088/1755-1315/441/1/012008

Abstract:The aim of this study were to determine the changes of vaname gill which infested by ectoparasites and the correlation between the degree of ectoparasite infestation. The results showed that ectoparasites were found in the gill of vaname shrimp were Zoothamnium sp. and Epistylis sp... The degree infestation of the infested gills showed moderate infestations for Zoothamnium sp.; moderate and mild infestations for Epistylis sp. Histopathology analysis found haemorrhagi and hyperplasia. The correlation between the degree of ectoparasite infestation and the changes of vaname gill histopathology infested by ectoparasite showed a positive correlation (r = 0.926), which means that the high degree of the infestation, the higher histopathological changes.
Sciprofile linkSuciyono, B S Rahardja, A I Prayoga, H Kenconojati, M F Ulkhaq
IOP Conference Series: Earth and Environmental Science, Volume 441; doi:10.1088/1755-1315/441/1/012089

Abstract:Bengkak mangrove center as a natural environment has been managed by the society as a means of tourism and preservation. These areas were located on Bali strait, consist of fisheries activity and residential. This study aims to determine the density of Avicennia sp, nitrate and phosphate content and the relationship between both. Three stations were determined using purposive sampling and the sample was obtained using the belt transect technique. Linear regression analysis was carried out to determine the density of Avicennia sp, with nitrate, phosphate content. Results of this study showed that the highest density of Avicennia sp was found in station 3 with a value of 3.25, followed by station 2 of 1.38, and the lowest density at station 1 was 0.71. Nevertheless, the highest concentrations of nitrate and phosphate were found at station 3 of 207.27 mg/kg and 0.23%. The relationship between the density of Avicennia sp, with nitrate and phosphate showed a positive correlation.
Rv Prasetya, Sutarno, M B Santanumurti
IOP Conference Series: Earth and Environmental Science, Volume 441; doi:10.1088/1755-1315/441/1/012013

Abstract:Tilapia (Oreochromis niloticus) is one of the fisheries commodities that are popular with many people. In aquaculture, fingerling is the main component that support the business. This study aimed to provide information on the performance of the rearing techniques of tilapia fingerling so that the information could be used in tilapia hatchery activities. This study was conducted at Loka PBIAT Janti, Klaten, Central Java on December 2018-January 2019. The work method used in this research was descriptive method with supported by primer and ssecondary data, especially survival rate data. With high quality rearing techniques, the survival rate of larasati tilapia fingerling in PBIAT Janti showed high level of 88.81%.
N Wantika, Budiana, E Suryani, L Rubi’Ah, N Dzatalini, Rusdiatin, Y T Nila, M B Santanumurti, S H Samara, D D Nindarwi, et al.
IOP Conference Series: Earth and Environmental Science, Volume 441; doi:10.1088/1755-1315/441/1/012051

Abstract:Colossoma macropomum is one of the fisheries commodities that has high economic value. It is necessary to to use quality feed, such as maggot, to increase its production. Since fish growth is largely influenced by nutrient content in feed and fish energy needs Maggot has high protein content of 40-50% and fat content 29-32%.This study aimed to determine the retention of protein and retention of Colossomamacropomum. This study used an experimental method with a Completely Randomized Design consisting five treatments and four replications. The provided treatment was a commercial feed which was replaced by the maggot fermentation with different doses. The treatments used in this study were: treatment P0 (0%), P1 (12%), P2 (14%), P3 (16%) and P4 (18%). Parameters observed in this study were protein retention and energy retention. This research used Variant Of Analysis (ANOVA) for data analysis. The result showed that the substitution of maggot fermentation flour on commercial feed for 30 days of maintenance was significantly different (p 0.05). The protein retention value of Colossoma macropomum's meat was 7.8568% -10.3620% and the energy retention showed 3.9868% -5.2540%.
Xuefei Zhang, Yi Xiong, Chuanyu Xiong, Xuejun Tang, Zhiwei Li
IOP Conference Series: Earth and Environmental Science, Volume 431; doi:10.1088/1755-1315/431/1/012066

Abstract:Electricity market is gradually tending to be more energy-saving and environmental-friendly. In the context of medium and long-term electricity trading mechanisms, it is important to implement energy-saving and emission reduction with more reasonable and effective mechanism to solve the shortcomings in the overall environment and achieve energy conservation. The author finds that the core idea of energy conservation and emission reduction mechanism abroad to internalize the external cost. After in-depth study, the author summarizes the problems in realizing energy conservation and emission reduction in the medium and long-term electricity trading mechanism in the current market. The core design ideas and main development models of the mechanism are analyzed. Finally, the author analyses the design of market mechanism under the mode of trading volume restriction and power transfer in power plants. In the whole process, the author makes an auxiliary analysis with actual cases for peer exchange.
Zheng Wan, Dongliang Tian, Lei Li, Jianping Chen, Wangrong Wang, Xinbo Qu, Bin Hu
IOP Conference Series: Earth and Environmental Science, Volume 431; doi:10.1088/1755-1315/431/1/012004

Abstract:In this paper, we study reducing the transient grounding resistance (TGR) of communication protection system with resistance matching method. We set single or double matching layers surround the grounding rod and change their sizes and conductivity to get the laws about reducing the TGR peak and stable value. The finite-difference time-domain (FDTD) method is adopted for calculating. For the single matching layer, both of the peak and stable value of the vertical grounding rod TGR reduce, compared with normal case, as matching layer exists when the conductivity of matching layer is larger than that of ground. For the double matching layers, the TGR value will reduce even more than single matching layer case when the conductivity of outer matching layer is larger than that of ground.
Hongbao Han, Sciprofile linkJinqiu Yang, Xiaohe Li, Shengzhi Liu, Weiwei Pan
IOP Conference Series: Earth and Environmental Science, Volume 431; doi:10.1088/1755-1315/431/1/012032

Abstract:At present, digital instrument control equipment and systems are widely used in nuclear power plants, in which computer is an important component of digital instrument control system. But the upgrading period of software and hardware system is very short. It is often faced with the shutdown of spare parts and the upgrade of software and hardware platform that can't support the original application software, which brings great challenges to the life management of computer. This paper expounds the application status of computer in the digital instrument and control system of nuclear power, the characteristics of life management, obsolescence solutions and risks, and introduces the virtual server technology. The application cases of Demineralized Water Production System (hereafter called SDA) booster upgrading project in a nuclear power plant are summarized, and the application scope and limitations of virtualization obsolescence management strategy are summarized. The practice shows that virtual server technology can effectively solve the problem of computer life cycle management in some cases, which is conducive to reducing costs and increasing efficiency, and improving the competitiveness of nuclear power.
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