检索结果-内蒙古大学图书馆

4th International Conference on Science, engineering, and Technology, ICSET 2024

作者： Setiawati, M. Saggaf, A. Hasyim, S. Civil Engineering Masters Study Program Faculty of Engineering Sriwijaya University Indonesia

Nanotechnology has been growing rapidly for the past decade. Nano Silica have also received much attention because of its great capability of thermal that can be used in various fields like chromatography, cosmetics, medicine, drugs, agriculture and optics. This paper then conducts literature review on the synthesis of nano silica materials from waste materials abundantly available such as fly ash and rice husk, especially using two popular synthesis methods namely sol-gel method and the alkali fusion method. In conclusion, despite utilizing waste materials, the results showed that those methods can produce nano silica with high-purity level. Additionally, compared to alkali fusion, the sol-gel method is considered better technique due to its simpler process, low-temperature need, and controllable morphology of nano silica. Therefore, sol gel method has been extensively applied to produce nano silica particle. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Sol-gel process

来源：评论

学校读者我要写书评

暂无评论

Central government role in road infrastructure development and economic growth in the form of future study: the case of Indonesia

引用

City, Territory and Architecture 2023年第1期10卷 12页

作者： Nawir, Daud Bakri, Muhammad Djaya Syarif, Iif Ahmad Study Program of Civil Engineering Faculty of Engineering Universitas Borneo Tarakan Tarakan Indonesia

Road infrastructure development in a country has been considered an important predictor of economic development and prosperity. Hence applying a systematic analysis approach, this study aims to project the future role of the central government in developing road infrastructure and its significance in the country's economic growth. The main data sources were the literature review and expert opinions in the form of self-administrative surveys and interviews. Besides, the Cross-impact Direct Influence (CDI) matrix was applied to formulate the questionnaire. For the data analysis purpose, MICMAC analysis and Scenario Wizard software were used. The MICMAC analysis results revealed the dominant role of 9 important/key variables in developing the Indonesian road infrastructure. Simultaneously 24 positive states of the important variables what identified via the Scenario-Wizard Method. Findings also depicted stronger consistency among the four scenarios. Whereas Scenario 1 showed the most ideal 9 key features related to Indonesia’s road infrastructure developments with a high intensity of concentrating the efforts on planning road infrastructure development in big cities and use of smart and modern technology. Moreover, presenting a group of constructs for developing road infrastructure and resultant economic growth in the country, the current study adds value to the existing literature. © 2023, The Author(s).

关键词： Central government role Economy growth Future study Road infrastructure Scenario-based planning

来源：评论

学校读者我要写书评

暂无评论

Investigation of Austempering Effect on Fatigue Crack Growth of AISI 4140 Steel

引用

Defect and Diffusion Forum 2024年 431卷 115-120页

作者： Badaruddin, Mohammad Ainnayah, Reza Annisa Wijaya, Rizqy Nurully Sumardi, Slamet Lampung Selatan Indonesia Department of Mechanical Engineering Faculty of Engineering Universitas Lampung Indonesia Undergraduate Study Program at the Department of M echanical Engineering Faculty of Engineering Universitas Lampung Indonesia

The compact tension (CT) and tensile specimens of the AISI 4140 steel in cold rolling condition (untreated steel) were austempered by immersing it into the salt bath at 362℃ for 60 minutes. The tensile strength properties and the fatigue crack growth (FCG) resistance were performed to investigate the effect of the austempering process in AISI 4140 steel. A significant increase in the yield strength for austempered steel is about 8.7 % and the elastic strain energy increases by 55.7 %. Austempered steel's fatigue crack cycle is longer than that of untreated steel. Data of stress intensity factor range (ΔK, MPa.m1/2) and FCG rate (da/dN, m/cycle) was constructed in double log plot x-y axes for determining the materials constants m and C according to Paris’s law equation using a linear regression method. From the curve of ΔK versus da/dN, the constant m value for austempered steel (m = 3.45) shows better resistance than untreated steel (m = 3.77). On the other hand, the constant C value of 1.409×10-12 for austempered steel is one order magnitude higher than that of untreated steel (C = 4.151×10-13). The resistance of austempered steel against fatigue crack growth can be attributed to the formation of a bainite structure. © 2024 Trans Tech Publications Ltd, Switzerland.

关键词： Stress intensity factors

来源：评论

学校读者我要写书评

暂无评论

Analysis of the institutional development of drinking water supply systems in XYZ City,Indonesia coastal area

River

引用

River 2023年第2期2卷 158-168页

作者： Firdaus Ali Dwi L.Lestari Marsya D.Putri Khalidah N.Azmi Indonesia Water Institute South JakartaIndonesia Department of Civil Engineering Faculty of EngineeringEnvironmental Engineering Study ProgramUniversitas IndonesiaKampus UI DepokDepok CityIndonesia

Based on the Regulation of the Minister of Public Works and Public Housing Number 4 of 2020,drinking water supply management can stand alone or work together with other *** local government establishes a Regional Drinking Water Company which has responsibility for supplying drinking water at the regency/city *** coastal city as the object of study manages clean water then transfers under a private *** to government restrictions regarding the authority to provide clean water,a technical implementation unit was formed for better solution in clean water *** new form of institution will be able to make decisions and carry out execution at any time because it is directly under the authority of the government,it can also apply the concept of good governance to support more transparent *** accordance with the policy,the new institutional form will be able to finance itself,develop the level of service and contribute to regional development as a source of local ***,the institutional transition requires adaptation both from a functional and operational *** this study,an analysis of the readiness for the transition of institutional forms is carried out to minimize conflicts such the lack of improvement in the quality of drinking water services due to limited government authority,insufficient qualified human resources in water management,and the difficulty of developing drinking water service infrastructure because it still depends on the private *** analysis of the structure and human resources associated with clean water service targets also *** strengthening,both regulatory and institutional,is necessary to maximize the roles and functions of the relevant *** a more comprehensive understanding in the preparation of contracts and division of authority,no parties will be aggrieved in the long term.

关键词： clean water services human resources institutions

来源：评论

学校读者我要写书评

暂无评论

Smart Parking System with IoT-Enabled using NodeMCU for Car Reservation in Public Areas 2

Smart Parking System with IoT-Enabled using NodeMCU for Car ...

引用

2nd IEEE International Conference on Electrical engineering, Computer and Information Technology, ICEECIT 2024

作者： Simatupang, Joni Welman Alfarizi, Yosep Salman Electrical Engineering Study Program Faculty of Engineering President University Cikarang Indonesia

ISBN: (纸本)9798331504373

This paper presents the smart parking system using NodeMCU ESP8266 for web-based car reservation in public areas. Conventional parking system made car users take a long time to find the parking in public areas like shopping centers or malls. Therefore, its necessary to overcome this problem by implementing the smart parking system of car reservation. The system prototype integrates the Internet of Things (IoT) technology, NodeMCU ESP8266 (microcontroller), Ultrasonic Sensor HC-SR04 (vehicle detector sensor in parking area), IR obstacle sensor (entry and exit), SG90 Servo (at the entry and exit gate) and Firebase to create a real-time database connected to a web platform. The system provides real-time slot availability information via the web platform and LCD as information at the entrance gate. Users can easily make and cancel reservations with additional features such as OTP verification, and automatic booking cancellation have been successfully implemented. The prototype test method consist of calibration test, sending OTP test, automatic booking cancellation test and manual booking cancellation test. The result of calibration test on 10 cm range have a 80% success rate for ultrasonic sensor 1 as well as the result of ultrasonic sensor 2. While, additional features test result such as sending OTP, automatic booking cancellation, and manual booking cancellation having 100% success rate. It can be concluded that this prototype is successfully implemented and reach the goals with minimum error can be tolerated. The authors suggest to adding a keypad and payment system to this prototype for improvement in the future. © 2024 IEEE.

关键词： Ultrasonic sensors

来源：评论

学校读者我要写书评

暂无评论

Development of a hazard risk map for assessing pedestrian risk in urban flash floods:A case study in Cúcuta,Colombia

River

引用

River 2024年第1期3卷 8-23页

作者： Gerald Augusto Corzo Perez Diego Ivan Sanchez Tapiero Manuel Antonio Contreras Martínez Chris Zevenbergen IHE Delft Institute for Water Education Hydroinformatics and Digital InnovationDelftThe Netherlands Master in Environmental Engineering Civil Engineering ProgramFaculty of Engineering and ArchitectureUniversity of PamplonaPamplonaColombia Faculty of Civil Engineering and Geosciences Delft University of TechnologyDelftThe Netherlands

The rapid growth of impervious areas in urban basins worldwide has increased the number of impermeable surfaces in cities,leading to severe flooding and significant economic losses for *** trend highlights the urgent need for methodologies that assess flood hazards and specifically address the direct impact on pedestrians,which is often overlooked in traditional flood hazard *** study aims to evaluate a methodology for assessing the risk to pedestrians from hydrodynamic forces during urban floods,with a specific focus on Cúcuta,*** methodology couples research outcomes from other studies on the impact of floodwaters on individuals of different ages and sizes with 1D/2D hydrological *** computational algorithms for image recognition were used to measure water levels at 5-s intervals on November 6,2020,using drones for digital elevation model data *** Cúcuta,where flood risk is high and drainage infrastructure is limited,the PCSWMM(Computer-based Urban Stormwater Management Model)was calibrated and validated to simulate extreme flood *** model incorporated urban infrastructure details and geomorphological parameters of Cúcuta's urban *** return periods(5,10,50,100),with extreme rainfall of 3 h,were used to estimate the variability of the risk *** output of the model was analyzed,and an integrated and time-varying comparison of the results was *** show that the regions of high-water depth and high velocity could vary significantly along the duration of the different extreme ***,from 5 to 100 years return period,the percentage of area at risk increased from 9.6%to 16.6%.The pedestrian sensitivity appears much higher than the increase in velocities or water depth *** study identified medium to high-risk locations,which are dynamic in *** can conclude dynamics are spatiotemporal,and the added information layer of pedestrians brings vulnerability information that is a

关键词： hazard and risk mapping pedestrian risk urban flood

来源：评论

学校读者我要写书评

暂无评论

Prediction Model for Track Quality Index Categories on the Northern and Southern Railway Lines of Java

引用

Periodica Polytechnica Transportation engineering 2025年第2期53卷 184-193页

作者： Yudariansyah, Hadi Ismiyati, Ismiyati Narendera, Alfa Doctoral Program of Civil Engineering Faculty of Engineering University of Diponegoro 5–7 Hayam Wuruk street Semarang50241 Indonesia Department of Civil Engineering Faculty of Engineering University of Diponegoro Prof. Sudarto Tembalang Street Semarang50275 Indonesia Department of Civil Engineering Faculty of Engineering Semarang State University E3–4 Kampus Sekaran Gunung Pati Street Semarang50229 Indonesia

Track quality index (TQI) is a quality metric that objectively measures the geometric condition of railway tracks for maintenance planning. The TQI categories serve as the basis for proposed track maintenance. The TQI measured by the EM120 track recording car on Java island currently covers only 78.84% of the 5,634.363 km of railway tracks, indicating that there are still track sections without TQI category values. This study aims to model the maintenance of railway infrastructure based on TQI categories derived from both track recording car results and manual measurements across various sections of railway lines on the northern and southern routes of Java island. The analysis used is based on the standard deviation of railway track geometry, including superelevation, levelling, lining, and track gauge. Factors such as turnouts, bridges, crossings, straight sections, and curves were then classified as predictive factors. Machine learning techniques were adopted, with 80% of the data set randomly used for training and the remaining for testing to generate TQI category predictions. A total of 233,175 TQI data points from 2019–2022 were used to build and validate the model. The results indicate that the multinomial regression model for TQI Categories 1, 2, 3, and 4 is highly accurate, the rest is influenced by other factors. These results imply that the model has an exceptional fit and excellent predictive capability for TQI on the northern and southern railway lines of Java island. © 2025 Budapest University of Technology and Economics. All rights reserved.

关键词： Prediction models

来源：评论

学校读者我要写书评

暂无评论

Implementation of Dama Mandala Application in Realizing Smart City Vision in Denpasar City 10

Implementation of Dama Mandala Application in Realizing Smar...

引用

10th International Conference on Smart Computing and Communication, ICSCC 2024

作者： Wedagama, Dewa Ayu Trisna Adhiswari Indrashwara, Decky Cipta Agung Ananda Putra, I Gusti Universitas Pendidikan Nasional Environmental Engineering Study Program Denpasar Indonesia Universitas Pendidikan Nasional Civil Engineering Study Program Denpasar Indonesia

ISBN: (纸本)9798350363104

The incorporation of information and communication technology (ICT) to improve infrastructure and establish a efficient and responsive environment is a key element of Denpasar Citys ambition to evolve into a Smart City. This research delves into the utilization of E Government, via the Dama Mandala app underscoring its significance in this transition. Through surveys and interviews employing a methodology the study demonstrates that the Dama Mandala app has greatly enriched the lives of Denpasar Citys inhabitants by granting them access to government services and information online. These results imply that the app plays a role, in realizing Denpasar Citys aspiration of becoming a culture oriented Smart City advancing towards the vision of Denpasar Maju. © 2024 IEEE.

关键词： Smart city

来源：评论

学校读者我要写书评

暂无评论

Application of the K-Medoids Clustering Model and Borda Decision Group in Viewing Flood Area Groupings in North Aceh Regency

Application of the K-Medoids Clustering Model and Borda Deci...

引用

2023 International Workshop on Artificial Intelligence and Image Processing, IWAIIP 2023

作者： Fuadi, Wahyu Sahputra, Ilham Fariadi, Dedi Agustinar Universitas Malikussaleh Informatics Engineering Study Program Faculty of Engineering Lhokseumawe Indonesia Universitas Malikussaleh Information Systems Study Program Faculty of Engineering Lhokseumawe Indonesia Universitas Malikussaleh Electrical Engineering Study Program Faculty of Engineering Lhokseumawe Indonesia

ISBN: (纸本)9798350382914

The importance of the K-Medoid model in viewing disaster-prone areas in each sub-district in North Aceh. The advantage of the k-medoid model results is that it has better cluster centers than other models. The novelty of this research is the cluster results are assessed by each decision maker using the Borda group model in providing flood disaster assistance or areas that are a priority for handling, which are included in the flood-prone cluster. Therefore, this research is important because it can be used to identify areas most severely affected by flooding. This research aims to analyze and identify the impact of flood hazards based on grouping and decision-making using the Borda group model in each sub-district in North Aceh. The results of the k-medoids model show 3 clusters that can see potential areas for flood disasters, namely very vulnerable. There are six sub-districts. For the k-medoids results, ten sub-districts are vulnerable. Lastly, the safe zones are 11 sub-districts. This research's k-medoid model analysis is more precise in seeing clusters of places that are potentially affected by flooding based on spatial maps of their nearest neighboring areas. The percentage of each cluster is as follows: Cluster 1 is 4%, Cluster 2 is 55%, and Cluster 3 is 41%. The k-medoid model provided this result after three iterations, with a closeness difference of 1.594510537. The results of the Borda model group research can be used as a recommendation for the areas that receive the highest priority in disaster management. © 2023 IEEE.

关键词： Floods

来源：评论

学校读者我要写书评

暂无评论

L-Heat Pipe Simulation for Lithium-Ion Electric Vehicle Battery Cooling Systems 4

L-Heat Pipe Simulation for Lithium-Ion Electric Vehicle Batt...

引用

4th International Symposium on Advances and Innovation in Mechanical engineering, ISAIME 2023

作者： Septiadi, Wayan Nata Astawa, Ketut Eleazar, Rolland Pierce Ramadhani, Dandi Bhaswara, Nabiel Rafa Angel Jayendra, Kadek Dananta Study Program of Mechanical Engineering Faculty of Engineering Universitas Udayana Bali Bukit Jimbaran80361 Indonesia

The Li-ion battery is electrical storage in the form of chemical energy and is considered the strongest candidate for electrical-based automotive applications. The performance of the battery greatly affects the performance of electric vehicles. There is a need for effective thermal management to control battery temperature below a defined temperature such as 50°C. The thermal management system in the battery can be done by passively cooling it using heat pipes and heat sinks. This research was conducted by simulating the Makara Electric Vehicle's electric scooter battery module which was applied with a heat pipe-based cooling system. The simulated module focuses on heat pipes and 18650 lithium-ion batteries with discharge rate variations of 1C, 2C., and 3C. The method used is literature study and CFD simulation. The results show that the heat pipe cooling system can reduce battery temperature at each discharge rate variation of 12,85%, 16,23%, and 23,74%. Heat Pipe can absorb the highest heat of 68,1178 kW when the module uses a 3C battery. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Cooling systems

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：