bluuebunny/crossref_metadata_2025 huggingface dataset:
User Compensation Mechanism and Benefit Analysis under Orderly Charging Mode
Authors: Qian B , Luo X E , Lin X M , Xiao Y
Published: October 2020

With the vigorous promotion of national and local policies, the number of electric vehicles has been greatly increased, and orderly charging has gradually become an effective means to relieve the pressure of charging and capacity. In order to enhance the participation of charging load aggregators and charging users, improve the effectiveness of orderly charging, and realize the win-win situation between the aggregators and users, in this paper, firstly, the analysis of charging station benefit model is carried out from two aspects of charging station operation cost and compensation price, and then the user charging supplement mechanism based on response mechanism is studied and finally through simulation examples, different scenarios of charging equipment utilization are set, and the benefits of charging load aggregators and charging users are analysed, which provides suggestions for charging load aggregators to choose appropriate user compensation scheme under orderly charging mode.
The Topology of a New Energy Router and Its Coordinated Control Strategy
Authors: Wang Min , Li Jiayi
Published: October 2020

With the rapid growth of the permeability of distributed new energy and the development of Energy Routers based on power electronics technology, the construction of AC/DC hybrid distribution network based on Energy Routers is expected to become a new development direction of urban power grid. This paper proposes a hybrid AC/DC main urban power Grid and Microgrid interconnection architecture based on a new Energy Router topology and its coordinated control strategy as the basic module of future urban power Grid. In this paper, considering the current situation of land resource shortage in the central area of the city, the new energy generation and energy storage technologies represented by photovoltaic building integration and electric vehicles are considered and connected to the urban distribution network in the form of integrated Microgrid. Considering that the electricity production and consumption patterns of adjacent Microgrids may be greatly different, the interconnection architecture between the main power grid and the Microgrid can be constructed. So in this paper, the Energy Router integrated with AC and DC double busbar and four voltage source inverter, coordinated control strategy is a blend of PQ control strategy and V/f control strategy, based on the disturbance observation method of MPPT control strategy of photovoltaic power generation and the control strategy of energy storage system, it not only make full use of new energy, but also effectively ensure the quality of electricity supply. Simulation and analysis of each model and control strategy were carried out on MATLAB 2016a/Simulink simulation platform, and the results verified the effectiveness and reliability of the proposed Energy Router topology and coordination control strategy.
Research on Video Detection of Object Intrusion in Substation
Authors: Jiang Yi , Sun Hui , Zhao Hanghang , Lin Rui , Li Zhe
Published: October 2020

The safe running of substations is an important part of power system security, as well as an important work of the power companies. The intrusion of kites, plastic trash, small animals and other objects will affect the safe running of substations. With the development of video monitoring technology, intelligent recognition technology of images and videos, video monitoring has gradually become the main monitoring means of unattended substations. This paper firstly analyses the research status and main technologies of video object recognition. To achieve the detection of foreign objects in substations, moving object detection and video object detection technologies are studied. And two outlines are proposed: using background subtraction and image classification, using YOLOv3 to detect objects in videos. In the end of the paper, YOLOv3 was tested by training a detector of small animals. The results show that the value of mAP equals to 0.7169 and the detection speed fulfills the request of real-time detection. This method could serve as reference for detecting and tracking intrusion objects in substations.
Analysis of Transformer Operation State Based on Multi-dimensional Data Joint Analysis
Authors: Zhendong Xu , Shuang Lu , Shijia Xia , Fang Xu
Published: October 2020

It is of great significance to accurate grasp the operating status of the power transformer and to discover the latent faults existing in the transformer in a timely and effective manner. Aiming at the problems of fewer parameters and lower diagnosis accuracy in power transformer evaluation model, this paper proposes a transformer state prediction model based on multi-dimensional data joint analysis. Comprehensively considering the oil dissolved gas data, partial discharge data, infrared data and environmental information data, we first use the sample case database to train the wavelet neural network, and then use the deep long short-term memory network that considers the time series attention mechanism to predict the parameters. The results are fed into the classifier, and we can obtain the operation result of the transformer. Tested on the actual transformer data, the experimental results show that the method has high prediction accuracy, which provides a reliable basis for maintenance personnel to predict the operating state of the transformer, and has certain application value.
Partial Discharge Pattern Recognition of Switchgear Based on Residual Convolutional Neural Network
Authors: Huang Xueyou , Xiong Jun , Zhang Yu , Liang Jingyi
Published: October 2020

The traditional switchgear partial discharge pattern recognition method lacks a certain generalization performance and the recognition accuracy is low, which is difficult to apply in practical engineering. In view of this, this paper proposes a switchgear partial discharge pattern recognition method based on residual convolutional neural network. By adding a residual module to the network to solve the problem of deterioration after the saturation of the network leads to the saturation of accuracy, and comprehensively utilize the shallow and deep features of switchgear partial discharge data fusion learning to achieve pattern recognition. In this paper, through partial discharge simulation experiments of different insulation defect types of switchgear and on-site detection of distribution stations, a sample database of partial discharge data of switchgear is constructed and analyzed. The experimental results show that the recognition accuracy rate of the proposed method is 96.06%, which is at least 20.22% higher than the traditional recognition methods, and with the increase of the number of samples in the training set, the recognition rate is greatly improved. The comprehensive use of the feature layer fusion module and the residual module significantly improves the generalization performance of the model, and it is more suitable for practical engineering.
Performance Parameter Analysis of Power Cable Modified Polypropylene (MPP) Conduit
Authors: Zhang Weiwei , Lin Ying , Liu Yuhui , Wang Haochen , Guo Chenrui
Published: October 2020

Modified polypropylene (MPP) conduits are increasingly used as protection conduits for trenchless power cables. In order to ensure the performance and quality of MPP conduits used in the field of power cables, this article has carried out research on its performance parameters and test methods. First of all, in view of the problem of excessive deviation of the MPP conduits appearance and size inspection, the relationship between the conduits wall thickness and the mechanical performance ring stiffness parameter was studied. Then, through the MPP conduits density, ring stiffness, Vicat softening temperature, and flattening test results, the correlation between the three parameters of density, ring stiffness, and Vicat softening temperature is analyzed. It also concluded that the ring stiffness and Vicat softening temperature have a moderate positive correlation. Finally, the article compares some similarities and differences between the MPP conduit and the CPVC conduit for two power cable protection conduits in terms of performance parameter test items.
Force-induced desorption of uniform block copolymers
Authors: Janse van Rensburg E J , Soteros C E , Whittington S G
Published: October 2020

We investigate self-avoiding walk models of linear block copolymers adsorbed at a surface and desorbed by the action of a force. We rigorously establish the dependence of the free energy on the adsorption and force parameters, and the form of the phase diagram for several cases, including AB-diblock copolymers and ABA-triblock copolymers, pulled from an end vertex and from the central vertex. Our interest in block copolymers is partly motivated by the occurrence of a novel mixed phase in a directed walk model of diblock copolymers Iliev and Janse van Rensburg (2012 J. Stat. Mech. P01019) and we believe that this paper is the first rigorous treatment of a self-avoiding walk model of the situation.
Very Short-term Wind Speed Prediction Using Geostatistical Kriging with External Trend
Authors: Wang Yu , Zhu Kunpeng , Zhu Changan
Published: October 2020

The prediction of wind speed plays a key role in the determination of the optimal reserve capacity for different time instants and the reduction of the standby cost of wind power grid. Short-term wind speed prediction can reduce the impact of wind power grid and improve the control of wind turbines. The geostatistics kriging as an unbiased estimation method applied to predict the wind speed in a two-dimensional vertical rectangular grid. The wind data were as a geographical variable considered. We firstly used exploratory methods to examine the spatial variability of wind speed and its dependence on geographical variables. The covariance and variogram models took into account in analysing the spatial structure of wind speed at three different instants of time. Then the product model adopted to fit wind data due to the variogram. The accuracy of the method was assessed through a cross validation. The prediction results were comparable with the observed values. The prediction error was about ±0.15 and the correlation coefficient was about 0.85. This study demonstrated that the kriging method could be success fully used in the short-time wind speed prediction in space and time direction.
Thermal Performance Simulation of PV Insulating Windows with Different Arrangement of PV Cells
Authors: Huang F C , Zhang W J , Zhao Y Q , Zhong Y H , Zhou J W
Published: October 2020

In order to explore the influence of the arrangement of PV cells on the heat transfer performance of the PV insulating window, this paper uses the finite element calculation software to conduct the heat transfer process of the PV insulating window using the bulk-shaped, square-shaped and stripe-shaped PV cell arrangements respectively Simulation analysis and calculation. The results show that the surface temperature of the PV window using the stripe-shaped PV cells is the lowest, and the surface temperature of the PV window using the bulk-shaped PV cells is the highest. The temperature difference between winter and summer is 4°C and 2.5°C. The former has the smallest comprehensive heat transfer coefficient in summer, which can reduce the adverse effect of PV cells on the building cooling load.
Rheological properties and sensory perception of kue lapis with spatial distribution of sucrose and vanilla aroma
Authors: Syarifuddin A , Usman N R , Dirpan A , Tawali A B
Published: October 2020

Sugar overconsumption has been related to nutrition-linked pathologies such obesity, diabetes and other health problems. However, the presence of sugar in processed foods is needed because sugar functions as a flavor generator and can affect the sensory properties. Therefore, this study investigated the effect of the spatial distribution of sucrose and aroma on rheological peroperties and sensory perception of traditional food. To do so, we performed our experiments using kue lapis, a traditional food of Indonesia, which consist of four layers and were designed with the same total amount of sucrose and vanilla aroma but varied in their spatial distribution. Panelist (n=20) rated the intensity of salty, sweet, sour, bitter tastes as well as vanilla aroma intensity and liking for each product. The results showed that products with addition of vanilla aroma having an higher aroma intensity regardless of the location of aroma and sucrose on each layer. In addition, products with added sucrose distributed in only one layer (top layer) and heterogeneous of aroma have an higher sweetness perception (p<0.05).
Food and energy development based on local potency, environmental degradation, and global perspectives
Authors: Darma R , Tenriawaru A N , Rahmadanih  , Viantika N M , Amiruddin A , Akzar R
Published: October 2020

Environmental degradation is increasingly threatened in line with the higher pressure on natural resources in an effort to liven up food production and biofuel energy. Food cannot be substituted by other products and can only be expanded through agronomic technology development, while energy can be generated from various sources, including by converting food into biofuels. Food and energy can be developed in Indonesia that has potential on the local endowment to produce food, generate primary energy (solar, wind, and water), and utilise new source renewable energy. In Indonesia, food and energy can be improved with enormous potency on local endowment to mount food production, produce primary energy (solar, wind, and water), as well as finding a new platform of renewable energy sources. Local or native food and the provision of alternative energy sources can encourage economic activity in local communities and promote bargaining positions in the global economy. Development on local food and alternative energy can be done by paying attention the use of local resource, function and role of community development and local organizations to support rural economic development and sustainable agriculture.
Does the asean economic community has an impact on cross border trade development in developing countries? (an example from Indonesia)
Authors: Zein Yahya Ahmad , Rohman Arif , Nurvianti Dewi , Fathurrahman
Published: October 2020

Few researchers addressed this issue due to the border area, oftentimes is considered as the zone with a lack of accessibility for clean water, education, health, and so on related to basic rights fulfillment. Nevertheless, people have been forgotten if this area has a high potential to develop state economically, as well as has a risk in particular for developing countries. According to the statement, it is important to examine whether the ASEAN Economic Community (AEC) has an impact on cross border trade development in Indonesia as a developing country as well as ASEAN Member State?. A special region is needed that can describe the conditions of trade relations between the two countries to analyze this research comprehensively so that one of Indonesia’s Border Regions namely North Kalimantan Province is represented by all the border regions in Indonesia and the problem in relation to customs border trade is in the trade in goods to be present. In order to find out the result, it used a normative research method, which is a type of legal research. The last but not least is the result showed that AEC has not been effective for Indonesian border area as a developing country due to the community have trade pattern traditionally, even for Indonesia and Malaysia have agreement on border trade agreement (BTA) before ASEAN established AEC, that pattern does exist. In Sum, AEC does not have a significant impact on improving trade activity in the Border Area of Indonesia.
Socio-economic conditions of transmigrants in Bulungan regency, North Kalimantan Province
Authors: Harihanto
Published: October 2020

This research was conducted to determine the socio-economic conditions of transmigrants placed in the Salimbatu Placement Transmigrant (LPT), Tanjung Buka, and Selimau. The study was conducted using a sample survey and collection methods as well as analyzing secondary data. The sample survey was carried out on 10% of the total number of transmigrant households in the study area. Determination of the sample is done in stages, first determining the sample area of three LPTs at random, secondly setting a sample of transmigrant household heads. The results showed that the transmigrants placed in the study area were not fully prosperous as expected. The indications are: (1) their agricultural production is low, on average only around 216 kg of rice / head of household / year, far below 320 kg of rice / head of family / year according to the poverty line of Sayogyo [1], (2) the income of transmigrants classified as “moderate” when compared with the minimum wage in force in the district of Bulungan in 2015, (3) the reduction in the area of their arable land from the original 1.5 ha / head of household obtained from the government, became only an average of 1, 2 ha / head of family; and (4) the frequency of planting and harvesting rice on average only once a year. The above conditions are mainly caused by: (1) the low fertility status of their agricultural land; (2) irrigation of rice fields which only depends on the tides of river or swamp water; (3) the number of plant pests (wild boar, rats and birds); and (4) still limited or difficult access to and from their territory. The transmigrants try to overcome these obstacles or obstacles in a number of ways: (1) looking for part-time work, and (2) adapting to natural conditions, both culturally (by changing habits in the area of origin) and ecologically. However, not all obstacles can be overcome and not all transmigrants have succeeded in overcoming the obstacles. Thus assistance is needed to help transmigrants improve their welfare, so that the main objective of the transmigration program, namely reducing poverty and improving people’s welfare can be achieved. The assistance needed includes: (1) building a swamp water system, so that trasmigrants can work on rice fields and grow rice throughout the year (for the long term), or provide water pumping machines to irrigate their fields from rivers, due to rivers in the area studies never dry throughout the year; (2) subsidizing the price of fertilizers and anti-pest medicines; (3) building a road network that connects all Transmigrant Settlement Locations in the transmigration area (for the long term), or for short-term assistance in providing water transportation facilities (motorized boats) to the transmigrant group.
The process of economic change of the Papuans in Jayapura
Authors: Kadir Akhmad , Rahmanto M I , Idris U , Ali A
Published: October 2020

This paper seeks to explain the process of economic change of the Papuans in Jayapura which tends to be subsistence-oriented in the face of a market economy that came with the wave of transmigration since the 1960s. Amid market economy penetration, Papuans are included in a dual economy where a subsistence orientation to meet domestic needs is still being carried out but at the same time facing a capitalistic market economy so that what follows is only the expansion of subsistence and marginality. History shows that Papuans with a subsistence-based economy find it difficult to compete with price-based markets and a large number of migrants having complex trade networks and more established access to expanses. In addition, the relatively small scale of trade and the lack of technical aspects of trading in a market economy such as bargaining, debts and subscription systems make it difficult for Papuans to collect profits from their trading. The community and the regional or central government responded to this with strategies and policies that provided momentum for the expansion of their commercial businesses. This study then looks at how the strategies and momentum that emerged and utilized optimally by the Papuans to develop their economy and what factors would inhibit or drive it.
Estimated economic value of the lost coastal resources due to tsunami in September 2018 in Palu City, Indonesia
Authors: Laapo A , Asih D N , Howara D , Sultan H , Abubakar I , Wahid A , Lanuhu N
Published: October 2020

The coastal area of Palu City has natural resources that are utilized by the community for fishing activities, marine tourism, salt pond, and culinary business. However, the tsunami disaster in September 2018 caused the loss of some coastal resources and community businesses that affected the regional economy. This study aims to estimate the value of the presence and loss of Palu coastal resources through fisheries activities, marine tourism, and other utilization activities. The analytical method used is the analysis of Total Economic Value. The results showed that before the earthquake and tsunami disaster in Palu City, the total economic value of coastal resource services owned was IDR 237.92 billion per year. The economic value lost due to the disaster is estimated at IDR 127.53 billion or more than half the initial economic value.
Indonesia’s strategy on achieving the sustainable development goals: a case study on handling of illegal, unreported, and unregulated fishing
Authors: Rahmadani  , Cangara A R , Darwis  , Baharuddin A , Apriliani A
Published: October 2020

This research aims to describe the strategy of Indonesia in achieving the target of Sustainable Development Goals 14 Life Below Water. This research focuses on policies that are created by the Ministry of Marine and Fisheries in handling IUUF (Illegal, Unreported, Unregulated Fishing) in Indonesia. This research uses qualitative research type with secondary data type and data collection method of literature review through various literature related to the problems studied that were obtained from books, journals, documents, reports, and articles. Furthermore, in analyzing the data, it uses qualitative data analysis techniques and deductive writing methods. The result of this research indicates that the Indonesian government, through the Ministry of Marine and Fisheries, has been successful in handling IUUF. The handling of IUUF in Indonesia is conducted by implementing various policies related to marine and fisheries. Indonesian government policy has a positive impact on the marine and fisheries sector. This means Indonesia is committed to achieving the target Sustainable Development Goals 14, especially in handling IUUF.
Mangrove ability to support green open space in Mamuju Regency
Authors: Marsawal D A
Published: October 2020

Green open space is one important component in developing an area. The proportion of the area of green open space in urban areas based on Law number 26 of 2007 concerning Spatial Planning is 30% of the city area. The green open space is divided into several criteria, namely public green open space and private green open space. Public green open space is open space managed by the government whose use is intended for the community. In addition to the aesthetics of public green open space also functions as an air purifier, guardian of groundwater sustainability, a place for the development of various flora and fauna, also provides economic benefits for the community. Mangrove vegetation has the ability to fulfill the function of the green open space. When developed into an open public heiau space, mangroves can have a positive impact on environmental development. Mangrove vegetation has the ability to minimize the erosion and hydrological standby of the region. Besides, mangroves also have the ability to absorb carbon emissions so as to keep the environment air conducive. Mangroves that are well managed can also create new tourist sites that can improve the economy of the surrounding community.
Response of growth and development of butternut squash (Cucurbita moschata) to the combination of bioslurry and NPK fertilization
Authors: Dermawan R , Kaimuddin  , Dungga N E , Sjahril R , Mollah A , Yuniarti N S
Published: October 2020

This study aims to study the effect of bioslurry and NPK fertilizers and to determine the best dosage of bioslurry and NPK fertilizer on the growth and development of butternut squash. The study was conducted from December 2018 to 21 March 2019 in Purnakarya Village, Tanralili District, Maros Regency, South Sulawesi. The study was set as a trial using a split plot design. The main plot was three bioslurry concentrations namely control, 100, and 200 mL L−1 bioslurry. The subplot was the application of NPK fertilizer types consisted of four levels, namely NPK Pak Tani (16-16-16), NPK Gold (16-10-18), NPK RG05 (15-10-30), and NPK Booster (12-6-22-3). The results of the experiment show that there was a significant interaction between bioslurry and NPK types on the stem diameter of butternut squash plants (bioslurry 100 mL L−1 and NPK Pak Tani). The bioslurry treatment showed a significant effect on fruit weight by the application of bioslurry 200 mL L−1 (978.42 g). NPK treatment significantly affected fruit length with use of NPK Pak Tani that resulted in the longest fruit (24.58 cm).
Isolation and identification of pathogen causes brown spot disease on yam tubers (Pachyrizus erosus) in Indonesia
Authors: Hamdayanty H , Malinda N
Published: October 2020

Yam (Pachyrhizus erosus) is a tuber that is widely used in industry. Controlling the condition of yam tubers during storage is very important to maintain the quality of the industrial product. This study aimed to isolate and identify pathogen in storage that causes brown spots on yam tubers. This research was conducted based on the main principles of the Koch postulate, i.e. isolation, inoculation, re-isolation and identification. The disease was characterized with brown spots with thin mycelium on the surface of the spots. Macroscopically, the hyphae of pathogens formed were white, cotton-like on the media. Microscopically, the hypha were insulated, branched, hyaline, and forming conidia (microconidia). The conidia were oval, one or two cells, and hyaline. Based on the identification, the fungus found in the yam tuber storage was Fusarium sp., a weak pathogen that can only infect yam tubers after a wound. Fusarium infection in yam tubers in this recent study is the first report of the disease in yam tubers that causes brown spots. The results of this study can be one of the bases in determining the level of brown spot discoloration control in yam during storage.
Farmers understanding and practices on shading and pruning for Arabica coffee – a survey and analysis on the effects to the yields
Authors: Musa Y , Bahrun A H , Rini A
Published: October 2020

This study aimed to identify and formulate the influence and correlation of farmers’ practices and understanding related to the shading and pruning on the yiels of their Arabica coffee. The research was carried out in Bolokan Village, Lembang Tiroan Bittuang, Tana Toraja Regency, South Sulawesi-Indonesia. The research was in the form of surveys (study literature, observations, and interviews), with the selection of samples carried out deliberately (purposive sampling). The data was analysed with multiple linear regression using SPSS software. The results showed that the different levels of practices related with shading and pruning management provided significant effect and correlation with the yields of coffee plants. The generated multiple linear regression equation was Y = 27.983 + 1.131X1 + 0.591X2 + 2.575X3 + 1.050X4 + 0.820X5 + 1.967X6 + 1.185X7 + 0.313X8 + 0.823X9. Factors from aspects of maintenance techniques related with shading and pruning could increase the production and productivity of Arabica coffee plants. Variables of plant height adjustment, flowering and fruiting stimulation through shading, production pruning, understanding of shade plants benefits and pests and diseases control were stated to have an influence on yields (fruit) of coffee plants, while shade management, pruning time, rejuvenation pruning, and permanent shade plants were declared to have no significant effect.
Correlation of total sulfur content to the percentage of pyrite content by microscopy in Mallawa formation coal, South Sulawesi Province, Indonesia
Authors: Anshariah  , Imran A.M. , Widodo Sri , Irvan Ulva Ria
Published: October 2020

The Mallawa Coal Formation in general, has a high sulfur content even though the calorific value is quite high. Deposition environment will affect the sulfur content in coal. This study aims to determine the relationship of sulfur content to the percentage of pyrite mineral content in coal by microscopy. The research method used is field data collection, each using the channel sampling method (ply by ply) in Pujananting Barru Regency and Massenrengpulu Bone regency. Then a proximate and petrographic analysis was carried out to obtain sulfur content, and the percentage of pyrite in coal. The analysis shows that coal in the Pujananting area shows no relationship correlation between total sulfur content in coal and the percentage of pyrite minerals, so it can be concluded that sulfur in Pujananting coal is organic sulfur, which is formed together with the formation of coal starting during the peat process. While Massenrengpulu coal shows a correlation and relationship between the increase in sulfur content and the increase in the percentage of pyrite minerals, it can be concluded that the sulfur content in Massenrengpulu coal is derived from pyritic sulfur, which is strongly influenced by the depositional environment where the coal is formed.
Effectiveness of integrated waste management based on community empowerment: a cast study of Mamuju city
Authors: Ansyar M H
Published: October 2020

The level of urbanization in Mamuju Regency has caused an increase in the volume of waste. due to the fact that the existing landfill in Mamuju Regency is approaching maximum capacity, the local government has been looking for alternatives in processing waste through the existence of a garbage bank program. Therefore, the reduction of waste through garbage banks has existed in Mamuju Regency. The main survey in the form of interviews with relevant stakeholders has been conducted to obtain data used for the analysis of community participation. This research was conducted by looking at the effectiveness of waste management in Mamuju Regency through a case study approach to the community as customers in the garbage bank program. The waste bank is a waste and waste management model, a form of waste management business by implementing the 3R (Reduce-Reuse-Recycle) activity. Waste banks can become economic institutions where waste can be a transaction tool used in their activities, because like conventional banks that use money as the instrument, the waste bank emphasizes its focus on waste management, which is the current environmental problem.
The importance of understanding technical terminology in coordination between ATC and the engineer
Authors: Firdaus N S , Yassi A H , Sukmawati
Published: October 2020

Technical terminology is very important in the world of aviation. In this case, the author will take up coordination between ATC and the engineer. In MATSC (Makassar Air Traffic Service Center), the engineer has the responsibility of the aircraft navigation equipment and the networking needed for the system. The ATC system used by ATC (Air Traffic Controller) to guide the aircraft from one place to the destination safely. Coordination between ATC and engineer must be understood so that there are no mistakes that cause a big problem of aviation. Terminology related to the system must be understood by both ATC and engineer.
Beam deflection analysis using the analytical and numerical method
Authors: Fiqih Achmad Zul , Juswan  , Alie Muhammad Zubair Muis
Published: October 2020

Generally, any construction needs elements as support to make structure becomes rigid such as a beam. Almost all construction elements require beams to connect one element to another. Generally, loads act on the construction could be center load or distribution load. The beam may deflect and deform due to applied load, so that needs to be analyzed for the structural rigidity. In the present study, beam deflection is analyzed using analytical and numerical methods. The cross-section of the steel beam is wide-flange, having dimension 400×200×8×12 in mm with different distributed applied load and boundary conditions. The result obtained by the analytical method is compared to the numerical method.
Sedimentation mechanism and provenance of sediment deposition in Sidenreng Lake, Sidrap District, South Sulawesi Province
Authors: Mu’min Risqa Permatasyara , Imran A.M. , Safruddim
Published: October 2020

Sedimentation is the deposition of rock material that has been transported by water or wind power. One result of the accumulation of sediment in a basin is siltation, which can cause flooding as it did at Lake Sidenreng. This research located in Teteaji Village, Tellu Limpoe District, Sidenreng Rappang Regency, South Sulawesi Province.. This research aims to determine the characteristics of the Sidenreng Lake Quaternary sediments, specifically in the mechanism of transportation and provenance. Determining the sediment characteristics is important as the basis of planning in overcoming various problems in the lake. The methods used in this study are granulometric analysis and petrographic analysis. The sieve analysis results that the average grain size at the study site consists of 3 (three) types of sedimentary fractions, namely medium sand, fine sand, and very fine sand. This material deposited with a bed load transport distribution system and weak depositional energy. Sand material is spreading from the southwest and is gradually smoothing to the northeast at the study site. The petrographic analysis results that the provenance of sediment deposited material in Lake Sidenreng comes from volcanic breccia rocks of the Camba Formation, lava tracts of Parepare Volcano Members, and the Sandstones of the Camba Formation and Walanae Formation.
A thousand of waste problems in Makassar: The fire in landfill case
Authors: Maskun  , Amirullah N A , Rachman W A , Kurniasi N F , Assidiq H
Published: October 2020

Waste is one of the serious problems in Makassar. It causes many problems of waste that is directly related to the lifestyle and culture of the people. Makassar is one of the cities that has high population and economic growth, thus triggering an increase in service, industry, business and so on. This research aims to examine the factors that cause waste problems in Makassar. In relation to fires in landfill of Antang based on existing legal regulatory perspectives, government policies are to handle waste and cultural issues related to social patterns of life public.
Modelling and simulation of damage mechanisms in railway vehicle-track interaction
Authors: Ciuffini F , Favo F , Giulianelli S , Miele A , Sitongia G R , Strano S
Published: October 2020

This paper focuses on the estimation of damage contribution that each type of railway vehicle produces on the line Pescara - Ancona. The results of the numerical simulations provides fundamental information to understand the railway vehicle properties mostly influencing track damage mechanisms. The results have clearly shown the influence of the wheelset vertical forces on the damage indicators. The analysis of the specific contribution on damage by a specific railway vehicle will be particularly important to modulate track access charges by vehicle type. Moreover, simulation results will allow to adjust the unit maintenance cost of the line on the class of train, whose volumes are known.
HGM: A Novel Monte-Carlo Simulations based Model for Malware Detection
Authors: Naveed M , Alrammal M , Bensefia A
Published: October 2020

Malware detection is a challenging and non-trivial task due to ever increase in several attacks and their sophistication level. Detection of such attacks demands the exploration of new approaches to generalize the attack patterns. One such approach is the use of Monte-Carlo simulations to train a reinforcement learning model. In this paper, we propose a self-adaptive Monte-Carlo simulation-based reinforcement model called Heuristic-based Generative Model (HGM), which generalizes the attack patterns in such a way that the new unknown attacks can be detected and flagged in real-time. The results show that HGM can detect a variety of malware with high accuracy.
Kinetics study of methane production from anaerobic digestion of sludge and wastewater recycled pulp and paper
Authors: Bakraoui M. , Karouach F. , Ouhammou B. , Lahboubi N. , Gnaoui Y. El , Kerrou O. , Aggour M. , El Bari H.
Published: October 2020

Methane yield is one of the important factors that indicate the anaerobic digestion (AD) process efficiency. The AD is an available treatment of recycled pulp and paper sludge (RPPS) and recycled pulp and paper wastewater (RPPW). This process protects the environment and produces methane, which is considered as renewable energy. In this study, the anaerobic treatment of the RPPW and RPPS were studied using 1L completely stirred tank reactor (CSTR) at laboratory scale with mesophilic conditions. However, a kinetic study was carried out using four models in order to compare and adjust the experimental results. The experimental results show that the RPPW and RPPS methane productions were between 691 and 945 mL/g based on volatile solid (VS), and the corresponding digestion time was about 26 days for the both experiment. The corresponding digestion time could be understood through the methane production kinetic models by digestion experiments within a short time. Different kinetics models were tested including Richards, Logistic, modified Gompertz and Cone models. The obtained results show the modified Gompertz model as the suitable model since it gives the lowest deviation from experimental results. Therefore, the proposed model could be used to accurately predict behavior of AD processes.
Comparative investigations on the electrochemical behaviors among Al and aluminum alloys
Authors: Deng Yonghong , Liu Jian , Qiao Yang , Niu Jintao
Published: October 2020

Al and aluminum alloys are widely used in the transportation industry and aerospace field owing to their low density. They are always utilized as the sheathing materials, whose corrosion resistances need special attention. In the study, the electrochemical impedance spectroscopy (EIS) measurements and potentiodynamic polarization tests are performed on pure Al, aluminum alloys 2A97, 6061, 7050 and 2024. The corrosion behaviors of the five materials are respectively characterized by the resultant indicators, such as the corrosion potential E

c
, the corrosion current density I

c
, the corroded surface morphology and the frequency characteristics. The materials sequences that determined respectively by these indicators are compared with each other. The conflicts among these sequences are found. Then potentiostatic polarization measurements are carried out on the five materials. The instantaneous characteristic of the corrosion potential and polarization current density of each material during its corrosion process is revealed. Because of the characteristic, it is concluded that the potentiostatic polarization measurement and resultant polarization current density are more suitable to characterize the corrosion behaviors of Al and aluminum alloys. The investigation could provide help in the exploitation of new aluminum alloys with the better corrosion property.
Reinforcement learning decoders for fault-tolerant quantum computation
Authors: Sweke Ryan , Kesselring Markus S , van Nieuwenburg Evert P L , Eisert Jens
Published: October 2020

Topological error correcting codes, and particularly the surface code, currently provide the most feasible road-map towards large-scale fault-tolerant quantum computation. As such, obtaining fast and flexible decoding algorithms for these codes, within the experimentally realistic and challenging context of faulty syndrome measurements, without requiring any final read-out of the physical qubits, is of critical importance. In this work, we show that the problem of decoding such codes can be naturally reformulated as a process of repeated interactions between a decoding agent and a code environment, to which the machinery of reinforcement learning can be applied to obtain decoding agents. While in principle this framework can be instantiated with environments modelling circuit level noise, we take a first step towards this goal by using deepQ learning to obtain decoding agents for a variety of simplified phenomenological noise models, which yield faulty syndrome measurements without including the propagation of errors which arise in full circuit level noise models.
A 20-year encounter with the imposter syndrome
Authors: Pederson Thoru
Published: October 2020

Both in their formative years and later careers, some scientists suffer from something more than occasional self-doubts. There is a more severe affliction that strikes many more than was once realized. Here I reflect on my encounter, in the hope that sharing it can be of some value.
Immunological and Psychological Efficacy of Meditation/Yoga Intervention Among People Living With HIV (PLWH): A Systematic Review and Meta-analyses of 19 Randomized Controlled Trials
Authors: Jiang Taiyi , Hou Jianhua , Sun Runsong , Dai Lili , Wang Wen , Wu Hao , Zhang Tong , Su Bin
Published: October 2020

Background

An expanding number of mind–body therapies are being used to reduce the psychological burden of peoples living with human immunodeficiency virus (HIV). However, the effects on the immune system and mental health varied among studies.

Purpose

This meta-analysis was conducted to summarize the randomized controlled trials to draw comprehensive conclusions regarding the psycho-immunological efficacy.

Methods

Random-effects models were used to assess the outcome of interest. Egger’s tests were used to identify publication bias. Subgroup and meta-regression were used to explore potential moderators. This review was registered on the PROSPERO database (CRD42019148118).

Results

Nineteen randomized controlled trials with a total sample size of 1,300 were included in this meta-analysis. Regarding immune system outcome, mind–body therapy significantly improved CD4 T-cell counts (Cohen’s d = 0.214, p = .027) and maintained (0.427, p = .049). In addition, baseline CD4 T-cell counts and years since HIV diagnosis significantly moderated the efficacy of mind–body practices on CD4 improvement (all ps < .001). Regarding mental health outcome, mind–body therapy significantly reduced stress, depression, and anxiety symptoms (0.422, p < .001; 0.506, p < .001, and 0.709, p < .001, respectively) while improving quality of life (0.67, p < .001).

Conclusions

Meditation/yoga intervention could result in potential benefits with regard to improved CD4 T-cell counts immediately after the intervention and at long-term follow-up, while also improving their mental health. The cost-effective meditation/yoga intervention should be integrated into routine care for people living with HIV, especially for those with lower CD4 baseline and fewer years since diagnosis.
Antithrombotic selection in patients undergoing transcatheter aortic valve replacement
Authors: Lai Jennifer K , Willenborg Katie L , Berei Theodore , Rose Anne E
Published: October 2020

Purpose

Clinical controversy regarding the most appropriate antithrombotic regimen after transcatheter aortic valve replacement remains. Current evidence, guidelines, and recommendations are discussed.

Antithrombotic selection following transcatheter aortic valve replacement depends on a variety of patient-specific factors. For patients without a preexisting indication for anticoagulation, initial trials employed dual antiplatelet therapy as the postprocedural therapy of choice. Newer studies in this patient population, however, suggest single antiplatelet therapy reduces bleeding events without sacrificing ischemic protection. In patients with a preexisting indication for anticoagulation, warfarin plus single antiplatelet therapy, as opposed to triple antithrombotic therapy, offered similar ischemic protection while reducing clinically significant bleeding. Warfarin monotherapy was associated with a further reduction in bleeding events. One trial demonstrated the safety and efficacy of using apixaban in patients with concomitant atrial fibrillation; however, routine use of rivaroxaban increased adverse cardiac and bleeding events, leaving the utility of direct-acting oral anticoagulants in question.

Conclusion

Available evidence and current guidelines point to a lack of consensus regarding antithrombotic selection after transcatheter aortic valve replacement. Patient-specific factors and comorbidities must be considered when tailoring therapy, with an emphasis on balancing thrombotic and bleeding risks.
Estimates of Inhalation Exposures to Oil-Related Components on the Supporting Vessels During the Deepwater Horizon Oil Spill
Authors: Huynh Tran B , Groth Caroline P , Ramachandran Gurumurthy , Banerjee Sudipto , Stenzel Mark , Blair Aaron , Sandler Dale P , Engel Lawrence S , Kwok Richard K , Stewart Patricia A
Published: October 2020

The Deepwater Horizon oil spill response and clean-up (OSRC) involved over 9000 large and small vessels deployed in waters of the Gulf of Mexico across four states (Alabama, Florida, Louisiana, and Mississippi). For the GuLF STUDY, we developed exposure estimates of oil-related components for many work groups to capture a wide range of OSRC operations on these vessels, such as supporting the four rig vessels charged with stopping the spill at the wellhead; skimming oil; in situ burning of oil; absorbing and containing oil by boom; and environmental monitoring. Work groups were developed by: (i) vessel activity; (ii) location (area of the Gulf or state); and (iii) time period. Using Bayesian methods, we computed exposure estimates for these groups for: total hydrocarbons measured as total petroleum hydrocarbons (THC), benzene, toluene, ethylbenzene, xylene, and n-hexane (BTEX-H). Estimates of the arithmetic means for THC ranged from 0.10 ppm [95% credible interval (CI) 0.04, 0.38 ppm] in time periods 2 and 3 (16 July–30 September 2010) to 15.06 ppm (95% CI 10.74, 22.41 ppm) in time period 1a (22 April–15 May 2010). BTEX-H estimates were substantially lower (in the parts per billion range). Exposure levels generally fell over time and differed statistically by activity, location, and time for some groups. These exposure estimates have been used to develop job–exposure matrices for the GuLF STUDY.