bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis on the influence of dike engineering on the discharge of artificial lake dam at the upstream end
Authors: Zhu Qiu-Ju , Liu Jin 
Published: March 2021

Abstract
The upstream end of Shagang Village levee engineering of Liuxi River is adjacent to the hot spring artificial lake dam. In this paper, one - dimensional and two - dimensional mathematical models of water flow near the levee engineering of Liuxi River are established and some empirical formulas are used. Through analysising synthetically the calculation results of the mathematical models and the empirical formulas, it is concluded that the construction of Shagang Village levee engineering of Liuxi river does not affect the normal discharge of the Artificial Lake dam during flood season. Thus It is not necessary to take special measures to reduce the impact of the levee engineering on the Artificial Lake dam.
A study on flow characteristics around a hemispherical dome
Authors: Shao Yu , Qiu Xiang 
Published: March 2021

AbstractLarge eddy simulation (LES) is used to investigate the unsteady flow around a hemispherical dome. The Reynolds number based on the diameter of the hemisphere is 2.4 × 104. The mean velocity field and fluctuation velocity field were systematically studied. By means of the distribution of mean pressure coefficient, the vulnerable position on the hemispherical dome was found. By means of mean velocity profile, three regions of different properties were divided, and their effects on other creatures and buildings were considered. The probability density function (PDF), joint probability density function (JPDF) and Lumley triangle are further studied. The different intensity of the intermittency of turbulence, the different proportion of ejection (Q2) and sweeping (Q4) events and the anisotropy of Reynolds stress are explained respectively in these three regions.
Analysis of Blasting Failure Characteristics and Damage Mechanism of Different Rock Mass Elastic Modulus Under Deep Crustal Stress
Authors: Wang Bo , Xie Liangfu , Zhu Qingyang , Cui Jianbin 
Published: March 2021

Abstract
In order to study the effect of elastic modulus of rock mass under deep crustal stress on blasting failure characteristics and damage mechanism, this paper simulates rock blasting with different elastic modulus through particle flow software. The blasting failure characteristics of rock mass are obtained by reading the peak stress changes from the measuring points. The damage mechanism of rock blasting is revealed from the aspects of crack distribution, crack development trend, fragment formation. The results show that: As the elastic modulus increases, the peak stress of each measuring point is gradually decreasing; with the increase of elastic modulus, the macro cracks of rock mass become shorter after blasting; when the elastic modulus is 48 GPA, the number of cracks is the largest and the development is relatively gentle.
Modeling the effect of temperature on strength development for cast-in-place box girder
Authors: Ding Ping-xiang , Xiong Jian-bo , Yang Hai-cheng , Li Kai , Xiao-ming  , Li Xie Wei-wie 
Published: March 2021

Abstract
In this paper, winter construction of cast-in-place box girder of Rongwu Expressway Project is taken as the research object. By analyzing the internal temperature field development data of box girder concrete structure and using MIDAS FEA finite element software, the simulation results are similar to those in the field. The development of concrete internal temperature field at ambient temperature 0°C and -10°C is calculated. The strength prediction of cast-in-place box girder concrete structure at lower internal temperature was carried out by using the maturity model established in laboratory test. With the decrease of ambient temperature, the internal temperature of cast-in-place box girder concrete structure decreases. The lower temperature of concrete in box girder is the edge part of the two flank plates, the windward side and the combined part of old and new concrete. Based on the maturity theory established earlier, the 5d tensile strength of different parts was calculated. Under 0°C and -10°C conditions, the minimum strength of the edge of cast-in-place box girder concrete wing plate is 47 MPa and 41.2 MPa, the minimum strength of the junction of new and old concrete is 50.5 MPa and 50.3 MPa and the minimum strength of the windward side is -52.2MPa and 51.2MPa respectively. The edge of the wing plate and the interface of new and old concrete should pay special attention to the protective insulation measures.
Natural characteristics of long span bridge under initial load: a case study of Minpu bridge
Authors: Chen Jinchang , Che Ailan 
Published: March 2021

Abstract
Natural frequencies and modes of bridges are very important for wind-resistant design, seismic design and damage test. Natural characteristics of existing bridge in design stage cannot consider the initial complex stress conditions. Actually, the bridge bears the complex initial load (Gravity load, Vehicle load, etc.) in the operation stage, which will cause a certain initial deflection, especially for long span bridges. So, the natural characteristics of bridge get changed. According to the design data of Minpu bridge, the three-dimensional finite element model of Minpu bridge is established by using frame element system based on SAP2000. Result shows that the first and second natural frequencies of the Minpu bridge in design stage are 0.12 Hz and 0.33 Hz respectively. Natural characteristics of Minpu bridge in the operation state are tested by using the microtremor measurement, and the first and second natural frequencies and modes of it are obtained. Result shows that the first natural frequency is 0.39 Hz. The second natural frequency is not uniform, which is within 2.34 ∼ 3.70 Hz. The results reflect that the first and second natural frequencies of the Minpu bridge in operation stage increased greatly, which show that the initial loading state will have a great impact on the natural characteristics of long span bridges.
How to Advance Water Conservancy Inspection under the New Situation
Authors: Lu Xiayi , Liu Zhongyi , Jing Huilin , Cheng Xia , Liu Shuguang 
Published: March 2021

Abstract
As an important means of water conservancy project construction and management, water conservancy project inspection plays an important role in the development of water conservancy. As the List of Common Problems in Water Conservancy Project Construction Inspection (Trial) (hereinafter referred to as the List) issued by the Ministry of Water Resources in 2019 provides a more standard new model for water conservancy inspection, how to improve the quality and efficiency of water conservancy inspection with accurate and efficient use of the List and maximization of its effectiveness is worth considering.
Simulation Evaluation and Analysis of Heavy-load Train Maintenance Mode Based on Petri Net
Authors: Li Chunyi , Wei Yuguang , Li Chen , Ma Bowen , Wang Anyu 
Published: March 2021

Abstract
In China’s comprehensive transportation system, railway is an important mode of transportation, and heavy-load railway is a large-capacity transportation channel, which can quickly improve efficiency and relieve the capacity of railway transportation. The efficiency and synergistic capability of each connecting point of heavy-haul railway determines the success or failure of the whole system. In this paper, two different maintenance modes, “planned repair” and “unit centralized repair”, are used to discuss the turnround procedure of rolling stock and the empty wagon’s operation procedure respectively. The Petri net model of the empty wagon’s operation procedure under different maintenance modes is established, and the simulation is completed by Visual Object Net++ software. The results show that “unit centralized repair” is beneficial to compress the operation time and accelerate the turnround of rolling stock.
Urban flood simulation based on distributed hydrological model: Tongzhou District, Beijing
Authors: Zhang Bo , Ding Xiangyi , Lu Chuiyu , Wang Jianhua 
Published: March 2021

Abstract
Floods are one of the most destructive natural disasters in the world, especially in densely populated and economic areas. Tongzhou is an important satellite city of Beijing, which undertakes the important mission of alleviating Beijing’s non-capital functions. Therefore, it is of great significance to study and analyze the flood process in Tongzhou. In this study, the distributed hydrological model WEP-L was used to construct a storm flood model in Tongzhou, and the flood process under different storm scenarios was studied and analyzed. The results show that under the once in 20 years rainstorm scenario, the precipitation in the study area increased by 92%, and the peak flow of Beiguan station increased by 171%; under the once in 20 years rainstorm scenario, the precipitation in the study area increased by 246%, and the peak flow at the Beiguan station increased by 430%; under the once-in-a-century rainstorm scenario, the precipitation in the study area increased by 297%, and the peak flow at the Beiguan station increased by 606%. This study can provide reference for the urban flood control planning of Tongzhou.
3D Numerical Simulation of Sea-cross Bridge Pier Wave Current Force Considering Local Scour Effect
Authors: Taoxiao Chen , Jinchun Hu , Gang Chen , Weiliang Dong , Shubo Yue 
Published: March 2021

Abstract
The combined force of wave and current is the key load to the foundation of the sea-cross bridge, which is directly related to the design scale. Local scour pits are quickly formed after the piers enter the water, so the influence of local scour pits on the wave current force should be taken into account. Typical bridge pier structure is selected as the research object by the project of Yushan Bridge. Physical model test was applied to research the wave current force on the current terrain. Through the application of Fluent -3D, the mathematical model was established, and the model was verified by the test results. By using the 3D mathematical model, the wave current force considering the bridge pier local scour was calculated to provide technical support for the design of the bridge.
Development of fragrance carrier from Luffa acutangula using zeolite A
Authors: Ayuningtyas K , Kusrini E , Prihandini W W 
Published: March 2021

Abstract
In order to study the effect of zeolite A (ZA) addition to adsorption efficiency of green tea oil (GTO) by Luffa fibre, an experiment has been carried out to prepare matrix zeolite A embedded in Luffa fiber composite (L-ZA) used as a fragrance carrier. LZA which retained the rate of release of GOT can be used as air freshener. This paper presents surface properties of ZA and influence of these properties on the ability to adsorb several fragrance compounds: cyclododecanol, heptanal,2-(phenylmethylene), isocitronellol, tonalid, and diethyl phthalate. The mass of ZA were varied 1; 2; 3 g and named as L-ZA1, L-ZA2 and L-ZA3 respectively. L-ZA composite was synthesized by mixing method using ZA and 1 g sodium alginate (SA). The function of SA is as a matrix binder, which it can also adsorb the GOT. The adsorption efficiency of perfume in L-ZA composite was observed by gravimetric analysis. Luffa, ZA and SA each have adsorption efficiency of 292.64%, 94.54% and 90.13%, respectively. Furthermore, the adsroption capacity were measured by gravimetric method, the structure of matrices was analyzed by SEM, and the bioactive compound of GTO were analyzed by FTIR and GC-MS.
Performance of K2O/Nb2O5as a heterogeneous catalyst for biofuel production
Authors: Yani F T , Husin H , Darmadi D , Muhammad S , Zaki M , Adrinda M , Thifal M 
Published: March 2021

AbstractThe objective of this study was to investigate K2O/Nb2O5as a new potential heterogeneous catalyst for biofuel production. The catalyst was prepared through an impregnation method using K2CO3and Nb2O5. The K2O/Nb2O5was analyzed by scanning electron microscopy (SEM) and Energy Dispersive X-ray (EDX). The catalyst was tested for biodiesel production. Transesterification was conducted using vegetable oil and methanol on the predetermined operating condition. The highest yield of biofuel was the reach of 98.5% at K2O loading of 50% on Nb2O3and the catalyst loaded of 4 wt.% to oil. In the increasing of potassium loading on Nb2O3shows increasing the activity of the catalysts. Potassium, as an active site, plays a vital role in the reaction of vegetable oil and methanol to produce biodiesel. It is a major component and enhance selectivity of the catalyst. Niobium was able to interact well with potassium, and it enhanced the crystallinity and stability of the catalyst. The characteristics of biodiesel, such as density and viscosity, are evaluated to confirm the purpose of catalyst function. The biodiesel characterization showed in the range with SNI standard.
Biodiesel production from palm oil using banana weevil ash as a solid catalyst
Authors: Meriatna M , Husin H , Riza M , Faisal M , Jakfar J , Khairunnisa K , Syafitri R 
Published: March 2021

Abstract
The aim of this research was to investigate the performance of a banana weevil ash catalyst for biodiesel production at varied methanol to oil ratio. The method is the ash catalyst prepared through the simple burning of banana weevil in an open room. The powder is crushed by mortar and calcined at 600 °C for 5 hours. The crystallinity and the morphologies of the powder were analyzed by XRD, SEM, and EDX. The biodiesel production was carried out in a batch reactor for 90 minutes using stirrer at 65 °C. The molar ratio of methanol to oil was varied of 6:1, 8:1, 10:1, 12:1, and 14:1 with catalyst loading of 4.0 wt.%. The results showed that the highest yield was reached 96% at methanol to oil ratios of 12:1. The density and viscosity of biodiesel were reported of 0.85 gr/ml and 3.04 cSt, respectively. The properties of biodiesel showed conformity in the range of SNI standard. Based on these results, it can be concluded that, banana weevil ashes can be a promising heterogeneous catalyst for biodiesel production.
Modelling of operational costs (tipping fees) and incentives to improve solid waste management services in Indonesia
Authors: Adi F E , Rarasati A D 
Published: March 2021

Abstract
Solid waste management is needed by each region as a response to population growth. Nevertheless, there are still many areas that have not been able to provide ideal facilities for good solid waste management. One solution that can be done is to create a solid waste treatment model that is suitable to be applied in Indonesia. By benchmarking in other countries, doing mathematical calculations using life cycle cost analysis, and validating experts. The step resulted in a suitable model applied in Indonesia, namely Waste to Energy with a financing scheme of 60% for the government and 40% for the private sector, an internal rate of return (IRR) of 33.11% and an assumed repayment period of 5 years 122 days.
Determination of toll gate optimal number: A case study of Kertosono – Kediri toll road in Indonesia
Authors: Wibisono R E , Soeparno S , Cahyono M S D 
Published: March 2021

Abstract
The Kertosono-Kediri toll gate is currently under construction and operated in 2021. This toll gate is the entrance of vehicles that move from the industrial area of Mojokerto, Kertosono. For exit access this toll gate serves vehicles through the Maron Kediri toll gate, and the Sonoagung Pambon toll gate. If the toll booths operated are not in accordance with the amount of vehicle flow, it can cause poor vehicle traffic performance. The purpose of this study was to the optimal number of the gate in serving toll user transactions. The method in this study uses the number of optimal gate rules carried out by organizing data based on variable values and parameters traffic intensity per lane in the toll-gate section. These variables include the average number of vehicles received per hour and the average number of vehicles received per hour. Based on the analysis shows the number of toll booths for the Maron Kediri toll gate with 95 units/hour as many as 4 gates, 189 units/hour requires 8 gates, and 284 units/hour requires 10 gates. The Sonoagung Prambon toll gate with 118 units/hour as many as 4 gates, 236 units/hour requires 8 gates, and 353 units/hour requires 10 gates.
Investigate Park and Ride performance assessment for the better sustainable urban transportation in Surabaya
Authors: Widayanti F R , Pattisinai A R 
Published: March 2021

Abstract
Parking lots on the side of the road result in a decrease in the capacity of the road, therefore it is necessary to provide Park and Ride (P&R) parking building facilities. The existence of parking building facilities must support the safety and smooth traffic. In addition to smooth traffic, an evaluation is also important to determine the quality of service in order to meet user expectations of parking facilities. The method used in this research is Importance Performance Analysis. The purpose of this study was to determine the assessment of the quality of service from the Mayjen Sungkono Surabaya Parking Building in terms of user perception. The questionnaire survey was conducted in the Mayjen Sungkono Surabaya parking building with a sample of 120 respondents. The results showed that parking building users were not satisfied with the services of the Mayjen Sungkono Surabaya parking building manager, one of which was in terms of reliability, namely the ability of officers to explain the service process of parking facilities.
Investigating the sans pareil streetscape configuration for creating thermal comfort urban place in Surabaya
Authors: Pattisinai A R , Widayanti F R 
Published: March 2021

Abstract
The case of climate change expand accelerated than before caused by human-made emissions happened in the street. Coastal cities such as Surabaya are needed a thermal comfort urban place to be the solution. Through the sans pareil streetscape, we can understand which configuration are more (or less) effective for creating thermal comfort urban place. To explore this, we surveyed Raya Darmo Street, Polisi Istimewa Street, and Diponegoro Street Surabaya, Indonesia (N=25). The method using is micro climate analysis with software ENVImet which simulated the micro-scale interactions among urban surfaces, vegetation, and the atmosphere. In this method, it is necessary to measure the thermal comfort index by computing the Temperature Humidity Index (THI) from the data for each thermal station. In the results of this microclimate analysis, six color distributions produced, which showed the climate level. From the color distribution at 12 a.m., showed that no comfortable spaces found on all three streetscapes. There are as many as 90% of streetscape cuts included in the criteria for being uncomfortable on Diponegoro Street. On Raya Darmo Street and Polisi Istimewa Street are included in the requirements of being uncomfortable with a percentage of 49% while the rest are moderate criteria.
Study on development of citra satellite remote sensing for map updating studies
Authors: Sari S F M , Wibisono R E 
Published: March 2021

Abstract
During the past 10 years, the city of Surabaya has experienced many changes in land use, especially land in East and West Surabaya where open land (rice fields, fields, ponds) has undergone a change to built up land, especially housing. The purpose of this study is to determine changes in land cover that occurred as a whole in the city of Surabaya from 2002 to 2014, to get the largest land cover changes that occurred in the East and West of the city of Surabaya. Multi-temporal satellite imagery method to determine changes in land cover that occurred as a whole in the city of Surabaya from 2002 to 2009. Results from the satellite classification of Landsat imagery data were analyzed using comparative analysis to obtain changes in built land cover, Green Open Space (GOS) and waters in the city of Surabaya. The classification method used is guided classification with object oriented. Study of Development of Remote Sensing Satellite Imagery for Updating Map Studies (Case Study: Surabaya City) requires the ability to apply and develop the results of research to be carried out for the benefit of society in general and the advancement of education in particular.
Risk analysis of toll road KPS project with SSM (Soft System Methodology) at Gempol – Banyuwangi toll road
Authors: Suranata P G , Wahyuni P I , Triswandana I W G E 
Published: March 2021

Abstract
Indonesia has a big dream of catching up with infrastructure development with other countries such as Malaysia and Thailand. The toll road as a pioneer of economic development in the future was built to connect Merak to Banyuwangi through the infrastructure of the Trans Java Toll Road. Gempol-Pasuruan, Pasuruan-Probolinggo, and Probolinggo Banyuwangi Toll Roads are the last tipping points and one of the concessionaires is PT. Jasa Marga Probolinggo Banyuwangi. Toll road construction is not free from limited infrastructure financing in Indonesia and the risks of this project disrupt project performance and affect the cost of the project, project time, and building quality. Soft System Methodology (SSM) method can help solve the problem of project risks starting from identifying the risks of project implementation and analyzing the risks that might occur. This research was conducted using the purposive sampling technique to collect respondent data from 3 toll roads and then analyze it with a probability risk test, consequence risk test, and soft system methodology (SSM). It can be concluded that the risk of obstacles in the mountainous region, relocation of roads that intersect with community social facilities is the most extreme risk which hinders the implementation of the construction of these 3 toll road projects.
Application of time management systems in tardiness of the auditorium construction projects in the district Bone Bolango, Gorontalo Province
Authors: Banteng B S D , Uno W R 
Published: March 2021

Abstract
Time management is an attempt to complete a project. This is supposed to improve priorities, and effort to increase the efficiency and effectiveness of project management in order to achieve maximum results from available resources. All of that is to achieve the goals of a construction project, specifically success that satisfy the criteria of time (schedule), cost (budget) and quality. The aspects of time management consist of scheduling, monitoring, comparing progress in the field with scheduling, determining the effects caused at the end of completion, planning treatment to control the effects, updating project scheduling. Analysis of the calculations proves that in the late jobs, the crash program can be done by increasing the number of workers to minimize the duration that is too late. The monitoring can reduce the deviation between progress against the schedule. The monitoring includes measurement and work results (progress) of each activity, then the measurement results are recorded (Report) into a report form. The monitoring includes measuring and recording the results of work, recording resource usage, checking the quality of resources, recording performance and productivity, checking the possibility of emergence of new critical paths, corrective action and update schedules. From this study the results obtained by the completion of work using time management work in construction of auditorium building of the Bone Bolango regents office can be accelerated by 40 %.