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The impact of soil erosion on sedimentation/silting and decreasing water quality in oxbow lake, Grogol Sub-district, Sukoharjo District

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AIP Conference Proceedings 2024年第1期3019卷

作者： Andi Renata Ade Yudono Suntoro Conrad Danisworo Cahyono Ikhsan Doctoral Program of Environmental Science Graduate School of Universitas Sebelas Maret Surakarta City Central Java Indonesia Environment Engineering UPN Veteran Yogyakarta Special Region of Yogyakarta Indonesia Graduate School of Universitas Sebelas Maret Surakarta City Central Java Indonesia

Land use changes that are not under its designation (carrying capacity and capacity) will cause environmental degradation such as erosion. Erosion that occurs, in general, will result in a reduction in soil fertility, a reduction in soil volume, and may result in silting/sedimentation and a decrease in water quality due to an increase in Total Suspended Solid (TSS) levels. The purpose of this study was to determine the Erosion Hazard Level (EHL) that occurred around the oxbow lake and the impact caused by the erosion on the sustainability of the function of the oxbow lake. The methods used in this research are field survey and mapping methods, laboratory analysis methods, and spatial analysis methods on topography and bathymetry as well as Sentinel Satellite Imagery to find out the estimated size of the existing TSS. Erosion rate measurements were carried out using the erosion measuring stick method to measure soil loss over a certain time. Based on the results of the study, it was found that there were two TBE in the study area, including areas with Very Heavy TBE (SB) due to having soil solum > 90 cm and erosion of 653.01 tons/ha/yr. (PME 1), 581.34 tons/ha /yr. (PME 2), and 1022 tons/ha/yr. (PME 3) (> 480 tons/ha/yr.); and areas with heavy TBE (B) due to having soil solum > 90 cm and erosion of 387.80 tons/ha/year (180 - 480 tons/ha/year). The impact of erosion can also result in silting/sedimentation in the oxbow lake so that it can indirectly lead to a reduction in oxbow lake capacity/reservoir and an increase in the TSS parameter which is expected to continue due to an increase in the trendline both in the amount of rainfall and the average rain that occurred in 3 years. and in 2022 (January – June).

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Photobiomodulation Effect of Infra-Red Laser on the Level of Gonad Maturity in the Simese Catfish (Pangasianodon Hypophthalmus)

SSRN

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SSRN 2022年

作者： Astuti, Suryani Dyah Febriastri, Amalia Rizky Mukti, Ahmad Taufiq Yaqubi, Ahmad Khalil Susilo, Yunus Department of Physics Faculty of Sciences and Technology Airlangga University Surabaya60115 Indonesia Faculty of Sciences and Technology Airlangga University Surabaya60115 Indonesia Department of Fish Health and Aquaculture Management Faculty of Fisheries and Marine Affairs Airlangga Universit Surabaya60115 Indonesia Doctoral Program Faculty of Science and Technology Airlangga University Surabaya60115 Indonesia Faculty of Engineering Dr Soetomo University Surabaya60118 Indonesia

This research’s goal is to establish the impact of photo biomodulation therapy using infrared diode laser irradiation (975.2 nm) on male Siamese catfish’s gonadal maturity level (Pan- gasianodon hypophthalmus). Infrared diode laser irradiation is used at the reproductive point (governor vessel), which is located 2/3 of the distance between the anus and the pectoral fin. TKG, gonado somatic index and hepatic somatic index were the parameters studied in this study. The treatments were as follows: Control- (no treatment), Control+ (ova prim), P1 (0.2 J/cm2), P2 (0.4 J/cm2), P3 (0.6 J/cm2), and P4 (0.8 J/cm2). Photo biomodulation therapy with infrared diode laser exposure can affect the level of gonad maturity (TKG), gonado somatic index, and hepatic somatic index in male Siamese catfish, according to the results of the tests (Pangasianodon hypopthalmus). The fish gonads at the TKG IV stage had the highest TKG at P2 (dose 0.4 J/cm2), with a GSI value of 1.02 percent and an HSI value of 1.46 percent. According to the findings of the study, photo biomodulation therapy with infrared diode laser exposure at a dose of 0.4 J/cm2 is the best way to increase the gonad maturity of male Siamese catfish (Pangasianodon hypophthalmus). © 2022, The Authors. All rights reserved.

关键词： Irradiation

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A new method of terrain self-adaptive matching algorithm for autonomous underwater vehicle 4

A new method of terrain self-adaptive matching algorithm for...

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2019 4th International Conference on Intelligent Computing and Signal Processing, ICSP 2019

作者： Lu, Xiong Jian, Shen Xiaowen, Bi Department of Radar System Ordnance NCO Academy of Army Engineering University Wuhan430075 China Post-doctoral Program on Control Science and Engineering Naval University of Engineering Wuhan430033 China

As different underwater terrain features will affect the accuracy of unscented Kalman filter terrain matching algorithm, a new terrain self-adaptive matching method is proposed which adjusts sigma point distribution by terrain features. The connection between sigma point distribution distance and three basic terrain features were analysed. Positioning error range were calculated using navigation positioning errors and underwater digital map. Terrain elevation standard deviation was used to characterize the information quantity of decision region. Scaling parameter was adjusted using linear mapping method and sigma point distribution distance was determined by terrain features. The simulation results proved better terrain adaptability and positioning precision of improved self-adaptive matching algorithm. © 2019 IOP Publishing Ltd. All rights reserved.

关键词： Autonomous underwater vehicles

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Risk impact on cost and time from the factors of contractor's managerial and operational 8

Risk impact on cost and time from the factors of contractor'...

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8th Annual International Conference 2018 on Science and engineering, AIC-SE 2018

作者： Husin, S. Abdullah Riza, M. Afifuddin, M. Engineering Doctoral Study Program Univ. of Syiah Kuala Banda Aceh23111 Indonesia Faculty of Engineering Univ. of Syiah Kuala Banda Aceh23111 Indonesia

Aceh Province over the last 20 years has experienced different events that can be divided into 3 (three) phases. 1st Phase is the phase of the conflict (2000-2004), 2nd Phase is the post-earthquake and tsunami rehabilitation and reconstruction phase of Aceh (2005-2009), and 3rd Phase is the post-rehabilitation and reconstruction phase (2010-present). Events that occurred during the last 20 years are certainly likely to provide risks to community activities in the province of Aceh. One of the activities affected by the event is the construction project work. The implementation of construction works affected by events in Aceh Province over the last 20 years is highly vulnerable to risks that impact on achieving project objectives such as cost and time. This study analyzes the impact of the contractor and operational managerial risk factors on the cost and timing of construction. Data were obtained from questionnaires distributed to 15 large qualification companies in Aceh Province. Testing data is done by using the validity test and reliability test. Data that has been valid and reliable then analyzed by using Severity Index (SI). The variables of a managerial risk factor with SI to the highest cost in 1st Phase are F5 (incompetent Engineer), 2nd Phase is F3 (lack of contractor experience), and 3rd Phase is F5 (incompetent Engineer). From the operational risk factor, the highest cost SI in each phase is the G3 variable (electrical disorder). The managerial risk factors with the highest time SI in 1st Phase are F6 (lack of top management support), 2nd Phase is F5 (incompetent engineer), and in 3rd Phase is F3 (lack of contractor experience ). From the operational risk factor, the highest time SI at each phase is G3 (electrical disorder). © Published under licence by IOP Publishing Ltd.

关键词： Contractors

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A new slip surface in noncohesive slopes

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IOP Conference Series: Materials Science and engineering 2022年第1期1212卷

作者： J A Repadi F Bari F A Ismail A Andriani A Hakam Doctoral Program Dept. Of Civil Eng. Faculty Of Engineering Andalas University Indonesia Lecturer of Dept. Of Civil Eng. Faculty Of Engineering Andalas University Indonesia

Determining the slope slip surface is difficult, prominent and uncertain. Slip-surface are utilized to estimate slope safety. This study aimed at investigating the slip surface caused by statistical loads by using experimental testing methods. The experimental method was conducted by providing a statistical load on the sand slope The load was used until the slope collapsed. Sand slopes were modeled in a glass box measuring 110 cm x 40 cm x 10 cm. The sand material used was sand that passed through sieve no.10 and was held by sieve no. 200. At a distance of 2.5 cm horizontally and at a distance of 5 cm vertically, colored marks were used to see the pattern of grain movement. Observations were conducted until the slope collapsed. The collapse pattern revealed in the experimental method is non-circular.

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Dynamic State of BESS in Microgrids 19

Dynamic State of BESS in Microgrids

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19th IEEE International Conference on Environment and Electrical engineering and 2019 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2019

作者： Pérez, G. Conde, A. Gutiérrez, G. Doctoral Program in Electrical Engineering Autonomous University of Nuevo Leon Nuevo Leon Mexico Department of Electrical Engineering Nacional Technology of Mexico/I.T.Morelia Mexico

ISBN: (纸本)9781728106526

This paper analyzes the impact of battery energy storage system (BESS) dynamics in micro grids subject to active power variations. The micro grid is connected to the utility through a high impedance feeder to consider poor contribution. Thus, the dynamic of the sources and loads connected will be greater to obtain a more complex operating scenario allowing the interaction between different types of non-regulated sources and energy storage systems. The microgrid can operate on island due to some contingency, by a normal operating condition or with a weak link;any of these conditions the energy required to supply the loads will depend meanly on the renewable and nonrenewable sources. The interconnection of the BESS in strategic points will allow to improve the regulation of energy. The latency times of battery charging and discharging and the limit of daily operations are shown as a real consideration in the control of the energy of the micro grid systems. The sizing and location of the batteries is made in the weakest nodes. The results show that the dynamic of BESS have an important impact in the energy availability for the microgrid operation. © 2019 IEEE.

关键词： Battery storage

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The Modification of the Perforated Plate in the Fluidized-Bed Combustor to Analyze Heat Convection Rate and Temperature

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Journal of Combustion 2021年第1期2021卷

作者： Erdiwansyah Mahidin Husin, Husni Faisal, Muhammad Muhtadin Gani, Asri Sardjono, R. E Mamat, Rizalman Doctoral Program School of Engineering Post Graduate Program Universitas Syiah Kuala Banda Aceh 23111 Indonesia Faculty of Engineering Universitas Serambi Mekkah Banda Aceh 23245 Indonesia Department of Chemical Engineering Universitas Syiah Kuala Banda Aceh 23111 Indonesia Department of Mechanical Engineering Universitas Abulyatama Aceh Aceh Besar 23372 Indonesia Department of Chemistry Faculty of Mathematics and Science Universitas Pendidikan Indonesia Bandung 40522 Indonesia Faculty of Mechanical Engineering Universiti Malaysia Pahang Gambang 26600 Malaysia

Investigation of combustion temperature through experiments with a wide range of fuels, both solid and liquid, is continuously being conducted by scientists around the world, while the measurement of heat transfer rate can be analyzed when the combustion process occurs. Previous research has generally been conducted using liquefied gas, fossil fuels, and alcohol additives. Specifically, the research in this work investigated the convection heat rate and combustion temperature through the modification of the perforated plate. The experiment was conducted in the fluidized-bed combustor (FBC) fuel chamber using solid waste fuel of oil palm biomass. Measurements were performed at four different points using the HotTemp HT-306 Digital Thermometer. The results of the experiment showed that the convection heat rate in measurement one (M-I) reached 8.258 W/m2 for palm kernel shell (PKS) fuel. Meanwhile, in measurement two (M-II), the convection rate of 7.392 W/m2 was produced by oil palm midrib (OPM) fuel. The highest combustion temperature was recorded with OPM fuel (884°C) at M-I. However, the combustion temperature of the PKS combustion process is higher at 896°C but shows a less good trend than OPM. Overall, the measurement results of the three types of fuel used to modify the perforated plate applied in the FBC fuel chamber are excellent. It can be proven that the fuel is put into the combustion chamber with nothing left. © 2021 Erdiwansyah et al.

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Autoencoders as Weight Initialization of Deep Classification Networks for Cancer versus Cancer Studies

arXiv

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arXiv 2020年

作者： Ferreira, Mafalda Falcão Camacho, Rui Teixeira, Luís F. Doctoral Program in Informatics Engineering Faculty of Engineering University of Porto INESC TEC - Institute for Systems and Computer Engineering Technology and Science Porto Portugal Department of Informatics Engineering Faculty of Engineering University of Porto Porto - Portugal

Cancer is still one of the most devastating diseases of our time. One way of automatically classifying tumor samples is by analyzing its derived molecular information (i.e., its genes expression signatures). In this work, we aim to distinguish three different types of cancer: thyroid, skin, and stomach. For that, we compare the performance of a Denoising Autoencoder (DAE) used as weight initialization of a deep neural network. Although we address a different domain problem in this work, we have adopted the same methodology of Ferreira et al.. In our experiments, we assess two different approaches when training the classification model: (a) fixing the weights, after pre-training the DAE, and (b) allowing fine-tuning of the entire classification network. Additionally, we apply two different strategies for embedding the DAE into the classification network: (1) by only importing the encoding layers, and (2) by inserting the complete autoencoder. Our best result was the combination of unsupervised feature learning through a DAE, followed by its full import into the classification network, and subsequent fine-tuning through supervised training, achieving an F1 score of 98.04% ± 1.09 when identifying cancerous thyroid samples. Copyright © 2020, The Authors. All rights reserved.

关键词： Classification (of information)

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An opportunity for using constructed wetland technology in hospital wastewater treatment: a preliminary study

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IOP Conference Series: Materials Science and engineering 2022年第1期1212卷

作者： A G Akhmad S Darman Aiyen W Pingkan S. Hamsens S. Hamsens Faculty of Engineering Tadulako University Palu Central Sulawesi Indonesia Doctoral Study Program of Agriculture Postgraduate of Tadulako University Palu Central Sulawesi Indonesia.

The problem faced by many hospitals in Indonesia is the low efficiency of Waste Water Treatment Plant (WWTP) hospitals. If it does not get the attention, it will have an impact on health and environmental pollution. Various technologies have been used but experienced many obstacles. Constructed wetlands based on aquatic plants that have been used in developed countries are very prospects of being developed in regions such as Indonesia with a tropical climate. A preliminary study is needed with the first step to investigate the quality of hospital wastewater in Palu City, Indonesia, as a sample. This study aims to obtain a description of hospital wastewater characteristics and to evaluate the performance of the hospital WWTP in Palu. Data collection was done by taking data indirectly through laboratory test results during 2015-2019. Tabulating data using Excel software to illustrate statistics, then presented in the form of bar charts, interpreting according to the quality standards. Investigation results showed that the characteristics of hospital inlet wastewater in Palu are parameter values varying with four high concentration parameters: total coliform, TSS, Ammonia Nitrogen, and COD. The efficiency level of WWTP hospitals in Palu is relatively low in removing pollutants.

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Risk profile for E-Rapor services for public high school

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AIP Conference Proceedings 2024年第1期3165卷

作者： Dinar Mutiara Kusumo Nugraheni Tamara Tamara Andi Kurniawan Nugroho Doctoral Program in Information Systems School of Postgraduate Studies Diponegoro University Jl. Prof Sudarto S.H. Tembalang Semarang 50275 Indonesia Department of Electrical Engineering Universitas Semarang Jl. Soekarno-Hatta Tlogosari Semarang Jawa Tengah Indonesia

The Indonesian government has implemented E-Rapor to be employed in Indonesia since 2016. During 2016 until 2022 the usage of E-Rapor has identified some risk issues from the school perspective. Therefore, this research aims to identify the risk of the usage of E-Rapor. The research method for this study is to use a case in one of the public high schools in Jakarta, Indonesia. The usage of E-Rapor started in 2016. The E-Rapor system’s objective is to give easy access to students’ result data (evaluation card) to the central government (DAPODIK), school principals, teachers, and student’s parents. However, the implementation of the E-Rapor system has created some risk However, implementing E-Rapor in Schools has created issues among teachers. Therefore, this research proposes a study to identify the risk of the E-Raport system adopting COBIT 2019. The risk profiles are identified only on the governing E-Rapor in School. The case study research was conducted in SMAN 61 Jakarta. The result shows that types of risks that occur in High School are lack of IT Expertise, lack of Standard Operating Procedures, and issues with E-Rapor usage. After recognizing the risk, this study also proposes a strategy for overcoming the risk. The High School needs to be concerned on the area of Managing Human Resources (APO7), Domain DSS03 (Managing Issues), and Domain DSS05 (Managing Security Services)

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