bluuebunny/crossref_metadata_2025 huggingface dataset:
Determination of the Ratio of the Number of Recoil Electrons to the Number of Photoelectrons by Experimentally Measured Ratio of the Intensities of Characteristic Fluorescent Radiation and Uncoherently Scattered X-Ray or Gamma Radiation, Explanation of the Results Obtained
Authors: Kosianov P M
Published: March 2021

Work presents the results of the theoretical and experimental analysiges of different forms of interaction of the photons of the ionizing emission s by substances, in particular, photo effect and the Compton scattering of these photons. Using the author developed a new method of determining the ratio of the number of Compton electrons to the number of photoelectrons for the first time obtained the experimental results for molybdenum and tungsten. Analysis of the results showed that there are significant discrepancies between previous theoretical calculations and experimental data. The new results of the measured simultaneously relations of sections for the heavy atoms with the aid of the method developed by the author, and the old measurements of these relations for the light atoms with the aid of the Wilson cloud chamber, with their comparison with the theoretical calculations, show that for the X-ray and gamma emissions of the range of energies in question, is observed the significant (by an order and more) unidirectional difference. The possibility of explaining these divergences by fundamentally new view on the states of electron in the atom is shown. The possibility to explain the divergences by the presence of the free state of electron in the atom is shown.
Formation of Requirements of Reliable Operation of Frictional Fixation Rock Bolts
Authors: Zubkov A A , Kutlubaev I M , Leont’eva E V , Turkin I S
Published: March 2021

Safe work practices of mine workings are provided by fixation of working surface. The ability and technical requirements to frictional fixation rock bolts are determined by ‘Change N°1’ for GOST 31559-2012 along with traditional rock bolts. Analysis of its construction has shown that the main indicator which determines reliable operation is load-bearing capacity and it is determined as minimum value of three values of load capability: a rod of the rock bolt, a limit stop on a rock bolt and a support plate. It is stated that load-bearing capacity of frictional fixation rock bolt must match load capability of the limit stop on a rock bolt. Maintenance of the initial indexes of load capability for the whole period of service is being provided by application of protective coatings on all rock bolt surfaces. Practicability of the coating based on high-density polyethylene compositions 600-800 μm thick has been proved as a result of the performed research. Comparative analysis of resistibility to concentrated alkaline and saline environment has shown retention of tensile strength.
Research on Carbon Emission Measurement of Construction Products Based on BIM
Authors: Ying Huang , Yifei He , Can Wang , Fansheng Kong
Published: March 2021

With global warming, environmental issues have gradually received attention. Surprisingly, the construction industry contributes most of the greenhouse gases. In order to reduce carbon emissions, the construction industry has proposed many energy-saving and emission-reduction methods from the perspectives of construction technology, reverse logistics supply chain optimization, and design optimization. However, problems in the prediction and measurement of carbon emissions have always been the focus and difficulty of the construction industry. Recently, BIM technology has continuously penetrated into the construction industry, which has influenced many scholars to gradually use BIM technology to reduce carbon emissions. Unlike other scholars, this research uses the Revit API to integrate carbon emission measurement functions into the Revit environment. These not only reduce the dependence on third-party software and tedious operations, but also provide architectural designers with reference information for environment optimization during the design stage.
Application of New Technology in the Development of Tunxi Old Street
Authors: Zhu Shengdong , Gan Zhuoting , Yu Xiangyang
Published: March 2021

Tunxi Old Street is a typical historical and cultural district in China. Taking Tunxi Old Street as the object, this paper studies the application of new technology in the development of historical and cultural blocks. The results show that the development of Tunxi Old Street has experienced the stages of commercial formation, service of foreign businessmen, service of urban residents, protection and utilization, tourism and shopping, among which new technologies such as transportation technology, service function, commercial format and economic system play a key role in the development of Tunxi Old Street.
Concrete Corrosion Mechanism and Durability Design of Municipal Sewerage
Authors: Zhang Wanlai , Zhao Chunyang , Zhang Chunmei , Guo Chunlei
Published: March 2021

In recent years, with the rapid development of urbanization, urban sewage pipe has become an important infrastructure, which plays a significant role in urban ecological security and social production development. Based on the investigation and analysis of concrete corrosion of sewage pipe in a certain city, the indoor simulated corrosion test is carried out, and the durability design method of sewage pipe concrete is put forward. Research findings show that the main cause of concrete corrosion failure in sewage pipe is sulfate erosion, and the modification of pipe concrete by mineral admixture and polypropylene fiber can effectively improve the durability of pipe concrete in sewage corrosion environment.
VOCs pollution characteristics and potential of ozone generation in Kaifeng City
Authors: Chen Zhen , Liu Yi , Wang Lin , Su Yanxia
Published: March 2021

In recent years, the exhausted gas from factories has become an important part of environmental pollution in Kaifeng City. Air samples were collected for 57 kinds of volatile organic compounds (VOCs) and 13 kinds of aldehydes and ketones from the Cancer Hospital of Kaifeng city between May and October 2019. The pollutants were measured by gas chromatography-mass spectrometry (GC-MS) and high-performance liquid chromatography (HPLC) technique. Combined with the 8-hour automatic monitoring data of air ozone automatic monitoring at this sampling site, a total of 31 observations on volatile organic compounds (VOCs) were carried out over between May and October 2019. The results showed that the average concentration of VOCs was in the order of oxygen-containing organic matters > alkanes > olefins > aromatic hydrocarbons > alkynes. Using SPSS26 statistical software, representative key species were selected from VOCs, and correlation analysis was conducted with ozone concentration and meteorological factors. The ozone concentration was significantly correlated with air temperature. Acrolein & propionaldehyde, acetaldehyde, and formaldehyde, had a significant negative correlation with ethylene and ethane. The highest ethylene and ethane concentrations appeared when there was west wind, while toluene showed a significantly high value in the southwest wind. The oxygenated organics had obvious wind direction characteristics and the four kinds of oxygenated organics were rarely affected by the west, northwest and north winds.
Study on temporal and spatial distribution Law of Chlorophyll-a Concentration in Nansi Lake
Authors: Li Qin , Sang Guoqing
Published: March 2021

In order to investigate the Nansi Lake chlorophyll-a concentration spatial distribution, to better cope with the lake eutrophication of lake water and water quality threat, and to ensure the function of the water transport channel and the storage reservoir in the east line project of the south to North Water Transfer in the lake area. By using the correlation analysis and regression analysis in statistical analysis, the best band of chlorophyll-a retrieval is the combined band of blue band, green band and red band, based on the relationship between measured chlorophyll-a concentration and Landsat 8 the reflection values of each band. On the basis of this, the regression fitting equation is constructed. Through the accuracy analysis, the inversion error is smaller and the fitting degree is 0.7, which has good applicability. In 2015, the results show that the chlorophyll-a concentration in Nansi Lake in January was as high as 10mg/m3. The concentration of chlorophyll-a in the lake coast is much higher than the central of the lake area. And the concentration of the Weishan Lake in the lower Lake area is higher than that of the other lake areas.
The vibration reduction performance of Tuned Liquid Damper on high-rise buildings with three-dimensional numerical simulation
Authors: Su Jizhi , Wu Hailiang , Zhang Wuchen , Liu Zhong , Wang Yamin , Cheng Nan
Published: March 2021

The vibration reduction effect of high-position fire-fighting water tanks on the roof of office buildings in State Grid Corporation of China is discussed in this article. A three-dimensional tuned liquid damper(TLD for short)-structure model was established based on Coupled Euler-Lagrange algorithm to compare the calculated results under unidirectional and bidirectional seismic waves. Meanwhile, a 10-storey frame structure with asymmetric plane was selected to study the controlling performance of TLD on torsional response. Top displacement and aseismic ratio are taken as the key parameters to verify the availability, and the results show that the displacement response of TLD-structure has the character of linear-superposition geometrically, and the response gets the maximum when the seismic characteristic period tends to its natural period. The position with smaller structural stiffness should be taken as the primary controlling part, and reduction effect is better in the direction with strong displacement-response. TLDs have positive effects on controlling the structural torsional response and the aseismic ratio could reach 30% or more.
Study on Preparation and Performance of Carbon Hexapolycarboxylic Acid Comprehensive Mother Liquor
Authors: Chen Wenhong , Deng Lei , Jiang Yu
Published: March 2021

With ethylene polyethylene glycol ether (EPEG), acrylic acid (AA), hydroxyethyl acrylate (HEA), and sodium gluconate (SG) as the main raw materials, we synthesized the carbon hexapolycarboxylic acid comprehensive mother liquor with the use of initiator. And the test result shows that the carboxylic acid mother liquor concrete has better fluidity, better slump loss resistant property and lower concrete viscosity when the mother liquor has a reaction temperature of 10°C, a reaction system concentration of 40%, and when the hydroxyethyl propylene takes 0.89% of the total mass.
Study on clustering analysis of building energy consumption data
Authors: Li Yehong , Yang Jiankun , Jiang Xiangyang
Published: March 2021

A large amount of building energy consumption data has been accumulated nowadays. Such data can help to find problems in building energy efficiency and put forward suggestions for imporvements. However, the present situation is that a big amount of data has been mothballed and its value has not been fully exploited. In this paper, clustering method is used to analyse the energy consumption data of 784 public buildings in Guangzhou. The method combines K-means algorithm and Euclidean distance for similarity measure, aiming to classify the time-series data of energy consumption. The analysis results identify well the energy consumption trends of these buildings. Three clusters of buildings with incresing energy consumption trends are taken as key target for energy conservation and four clusters of buildings with downward energy consumption trends are treated as example buildings for experience learning. A further analysis of the clusters finds the characteristics of each group, this helps understand better the patterns of building energy consumption. The clustering analysis facilitates more effective diagnosis in energy efficiency and also supports policy making regarding building energy conservation.
Mix Design Analysis on the Steel Fiber Reinforced High Strength Concrete
Authors: Zhou Yifan
Published: March 2021

As a relatively new construction material, steel fiber reinforced concrete gradually plays an important role in building construction, frame joints, roof waterproofing, underground waterproofing and other engineering fields. At the same time, the mixing design of fiber reinforced concrete is also becoming more important. This paper analyzed two experiments held to explore the influences of different factors on the strength and economic efficiency of steel fiber reinforced concrete. The first one was Research on Direct Design Method of Steel Fiber High-strength Concrete Mix conducted by a research group from North China Institute of Water Resources and Hydropower; the other one was Mix Design and Performance Calculation Method of Steel Fiber Recycled Concrete conducted by Lijuan Zhang from Zhengzhou University. The mutual results were explored and the two methods were compared and analyzed. Through the data and analysis, it was found that the strength of concrete would increase as the increasing of volume percentage of steel fibers and the decreasing of water-cement ratio. The effect of enhancement by steel fibers on compressive strength was relatively small. Besides, the cost of steel fiber concrete was higher than traditional concrete. Using recycled aggregates to mix concrete could make steel fiber reinforced concrete more economically and environmentally friendly.
Investigation of civil building damage and its spatial characteristics under 2019 ML6.0 Changning earthquake
Authors: Zhou Hanxu , Che Ailan , Shuai Xianghua
Published: March 2021

An ML6.0 earthquake occurred at 22:55 on June 17, 2019, in Changning County, Yibin City, Sichuan Province, China. The Changning earthquake killed 13 people and affected an area of 3075 km2. The disaster caused by the earthquake is mainly the damage of civil buildings in the affected area. A field investigation on civil building damage was conducted by the authors after the earthquake occurrence. The destruction forms and damage area of civil buildings in 44 villages from different seismic intensity regions were collected and it was found that there are significant differences in the severity of building damage of different structure types. In order to analyse the spatial correlation between building damage and influencing factors, nine indicators are selected including structure type, PGA, elevation, slope angle, population density, per capita GDP, distance to river, distance to fault and NDVI, and damage ratio is defined to measure the degree of building damage in each village. The spatial correlation between civil building damage and influencing factors is analysed in GIS using histogram statistics and correlation analysis. The results show that PGA has the strongest correlation with civil building damage. In the area with greater seismic motion, the civil building damage is more serious. Structure type and economy level also have significant linear relationship with building damage.
Study on Runoff Characteristics and Countermeasures of the Upper Reaches of Nanpanjiang River Under the Background of Drought in Southwest China
Authors: Zheng Jiangli , Liu Xia
Published: March 2021

Climate change can cause strong fluctuations in the hydrological series. From 2009 to 2013, the continuous drought in southwest China had a very adverse impact on local climate and hydrological elements. In this paper, Xiaolongtan Hydrological Station, an important hydrological observation station on the Nanpanjiang River basin in southwest China, was taken as the research object. Mann-Kendall method was used to analyze the trend and abrupt change of the long series of runoff from 1961 to 2018 in Xiaolongtan. On this basis, the contribution rate of climate change and human activities to the runoff change of Xiaolongtan Hydrological Station in Nanpanjiang was quantitatively analyzed by using the double mass curve method. The results show that :(1) the runoff of Nanpanjiang River basin decreased from 1961 to 2018, and abruptly changed in 1980. Human activities were the main driving factor for the annual runoff reduction of Nanpanjiang River basin, contributing 96.23% to runoff reduction, and precipitation contributed only 3.77% to runoff reduction. (2) The construction of Chaishitan Reservoir played a crucial role in the annual redistribution of water volume in the Nanpanjiang River basin, which greatly reduced the adverse impact of successive droughts on the surrounding areas of the Nanpanjiang River basin. The results of this study can alleviate the adverse effects of continuous drought on the Nanpanjiang River basin and provide an important reference for the rational allocation of water resources in the Nanpanjiang River basin under drought conditions.
Research on Evaluation Index System of Mountain Expressway Landscape Coordination
Authors: Zheng Fu , Qin Zhibin
Published: March 2021

To better evaluate the effect of mountainous expressway landscape restoration scientifically and reasonably, this paper discussed the evaluation index system of mountainous expressway landscape coordination. Based on scientifically grasping the meaning and characteristics of mountainous expressway landscape coordination, 15 first-level evaluation indicators and 36 second-level evaluation indicators were selected from four aspects: internal highway landscape coordination, external environment coordination, road landscape coordination, and landscape and safety coordination. The index constructed the evaluation index system of mountainous expressway landscape coordination and explained the significance of the evaluation index. To serve the purpose of evaluating the coordination of the mountain road landscape, the constituent factors of the secondary indicators were standardized and scored to achieve the grading and quantification of the indicators. This paper also discussed the evaluation method of highway landscape coordination, which can enrich the theory and method system of mountain highway landscape coordination evaluation to a certain extent.
Experiment research on multi-factor model for chloride migration coefficient within concrete
Authors: Zhao Jiaqi , Fan Zhihong , Xiong Jianbo , Zhang Dongfang , Wu Qingfa
Published: March 2021

A multi-factor model for chloride diffusion coefficient of concrete contained fly ash and blast furnace slag was developed based on experimental investigation. Firstly, by adopting the experiment design technology, the RCM test with 12 sets of concrete specimens were carried out. Then, the influential laws of various factors, including water-binder ratio, replacement of fly ash and replacement of blast furnace slag were explored. Furthermore, based on nonlinear least squares method and the RCM test data, a multi-factor model for the initial chloride diffusion coefficient by comprehensively taking into account the influence of water-to-binder ratio, replacement of fly ash and replacement of blast furnace slag were developed. Finally, the accuracy and applicability of the proposed model were demonstrated by comparing it with experimental data of RCM and the predicted values of chloride migration coefficient models.
The Application of Improved Genetic Algorithm to the Back Analysis of Foundation Pit Construction
Authors: Peng Kai , Zhou Yuefei , Liu Yaolai , Ma Liangliang , Xie Yi , Deng Fang , Bai Zhijun , Li Yuepeng
Published: March 2021

The improved genetic algorithm is combined into the foundation pit finite element method. On the basis of the measured lateral displacement data on site, the parameters of the foundation soils were obtained by the back analysis. Then the lateral deformation of the surrounding soil was analyzed on the condition of each different step under the foundation pit excavation according to the inversion parameters, and the calculation and analysis of lateral displacement of cement-soil pile with anchorage retaining structure was did. The results reveal that the calculated value is agreed with to the measured value, which indicates that the improved genetic algorithm is efficient to the related constructions.
Finite element analysis of contact between new-built structure and old subgrade in pile-plank structure
Authors: Li Shuli , Xu Haotian , Han Wenwen , Fu Jundong , Wan Shui
Published: March 2021

Under different working conditions of two vehicle load and four vehicle load, the changes of contact normal stress and friction normal stress between contact surfaces of pile-plank structure were systematically simulated by FEM respectively. The results show that the contact normal stress and friction normal stress are both maximum under the condition of four-vehicle load, and condition 23 is the most unfavorable overall stress situation in which the maximum contact normal stress reached 302.936kPa and the maximum friction normal stress reached 90.881kPa.
Study on prediction of riverbed erosion and deposition at tail of Ganjiang River
Authors: Ge Hua , Deng Chunyan , Gong Ping
Published: March 2021

The trend of a river erosion and deposition is the first construction condition for a bridge construction. In order to evaluate the construction conditions of a bridge located at the end of Ganjiang River, based on the two-dimensional flow and sediment mathematical model, the amount and distribution of sediment erosion and deposition in the river reach under various typical and series of annual flow and sediment processes were calculated and analysed in this paper. The results show that the river reach where the project is located is dominated by micro siltation under various water and sediment processes, but the unfavourable conditions caused by local scour of piers should be considered in the construction of the project.
Continuous Detecting Device and Method for Ammonia Gas Release in Concrete Mixed with Denitrified Fly Ash
Authors: Zhang Sijia , Zhang Xiusong , Wu Shuai , Kong Xiangzhi , Wu Kui
Published: March 2021

The ammonia gas released from concrete mixed with denitrified fly ash has a negative impact on the performance of concrete, and is also hazardous to the health of constructors in closed spaces such as hydraulic tunnels and subways. The study of ammonia gas releasing law of concrete mixed with denitrified fly ash can provide a solution to eliminate these adverse effects. Moreover, ammonia gas releasing is a continuous and slow process, and there is no effective detection method at present. In order to solve the problem that ammonia gas release from concrete mixed with denitrified fly ash cannot be absorbed and detected continuously, in this paper, a continuous testing device for ammonia gas release from concrete is developed, which can adjust the temperature and wind speed in the test box to simulate the construction environment, vibration and hardening process, and realize the real-time detection of ammonia gas release from pouring to curing of concrete. The ammonia gas releasing law of concrete mixed with denitrified fly ash in the process of vibrating and hardening was tested. The results show that vibrating can accelerate ammonia gas releasing in concrete, and ventilation is beneficial to ammonia gas dissipation. The ammonia gas concentration in the test chamber decreases gradually and tends to zero with the increase of ventilation time. The total ammonia gas release from concrete increases significantly in the early hardening stage and gradually increases with the time, and finally tends to be stable. The release rate of ammonia gas in concrete accords with the exponential decay law.
Preliminary study on the antibacterial activity of liquid smoke from cacao pod shells (Theobroma cacao L)
Authors: Desvita H , Faisal M , Mahidin M , Suhendrayatna S
Published: March 2021

Cacao pod shells (Theobroma cacao L) form biomass waste that can be used as raw material for liquid smoke because this biomass contains lignin, cellulose, and hemicellulose. This research studied the antimicrobial activity of liquid smoke from cacao pod shells on several common food-borne pathogens, such as Salmonella choleraesuis, Escherichia coli, Staphylococcus aureus, and Bacillus subtilis. The liquid smoke used was obtained from cacao pod shells that were pyrolyzed at 300 °C (T1), 340 °C (T2), and 380 °C (T3). Liquid smoke concentration varied from 1% to 5%. The antbacterial activity test was conducted using the Kirby–Bauer method. The results showed that liquid smoke produced from T1 and T2 (and at liquid smoke concentrations of 4% and 5%) could inhibit the growth of all the tested bacteria. At T3 and 1–5% of liquid smoke, only E. coli was consistently inhibited (inhibition zone = 6–7.05 mm), while the growth of S. choleraesuis and S. aureus was inhibited at 3–5% liquid smoke with the inhibition zone ranging from 6 mm to 7.2 mm. B. subtilis was inhibited by a 2–5% liquid smoke concentration. All the tested bacteria showed sensitivity to liquid smoke, but E. coli was the stronger resistant compared to others. The results of this study show that liquid smoke from cacao pod shells could be used as a preservative agent to inhibit microorganisms in food.
Comparison the ANN models of Penman-Monteith Potential Evapotranspiration with combination two input of climatological data in Surabaya
Authors: Nusantara D A D , Nadiar F
Published: March 2021

In Surabaya, as a part of the equatorial region, determine the rate of daily potential evapotranspiration (PET) turns into a requirement. During the scarcity season, the rate of PET significantly increases for certifying water availability. The PET model founded from several inputs of climatological data that are relative-humidity, wind speed, average daily temperature, and the duration of sun exposure. Modeling a PET through prolonged and complicated steps. To simplify the development of modeling PET, this research using Artificial Neural Network (ANN) based on data-driven modeling with fewer inputs. The PET-ANN model intends to match the PET estimated with Penman-Monteith (PM). This research purpose is learning what the best combination of two climatological data as input. The perform MSE and R on the validating process present how the different results come. The results show the best combination of two climatological data from the entire data set as an input. The conclusion is that the combination of relative humidity and wind speed as an input to the PET-ANN presents the best result than other combinations of climatological data. Besides, it approves that the relative humidity and wind speed as an undoubted input to the PET model even using ANN or not.
Analysis cost of safety on project irrigation/channel base on WBS (Work Breakdown Structure)
Authors: Utama W A , Latief Y
Published: March 2021

The implementation of construction projects in Indonesia in general the number of work accidents also increased. Referring from BPJS, nationally the number of work accident accidents in the construction sector was recorded as the national sector with the highest number of occupational accidents. The regulations regarding OHS financing in Indonesia have not been clearly and measurably regulated. Existing regulations regarding HSE financing are regulated in three regulations, namely, Permen PUPR No. 31/2015, SE Menteri PUPR No. 66/2015, Permen PUPR No. 28/2016, and the last in SE Menteri PUPR No. 11/2019. Activity-Based Costing (ABC) has emerged as a new approach that connects costs directly related to business activities with manufactured products. This study aims to identify any risks that are potentially hazardous in irrigation work, making a safety plan using risk-based WBS standards, and the results of this research can make Analysis cost of safety for irrigation works.
Shady residency: Passive technologies through shading devices for some building styles to fix heat problem causes by climate change in a tropical area
Authors: Nadiar F , Nusantara D A D
Published: March 2021

The issue of Green Building arises after environmental issues that lead to global warming are echoed. All kinds of interpretations about green buildings are often associated with the building’s adaptation ability to the environment including the heat problems. This research aims to evaluate shading devices in 3 building styles, namely Minimalist, Modern Tropical, and Mediterranean in how to respond to heat problems due to climate change and investigating shading devices that have the potential to be applied to all building styles by using the simulation method with ECOTECT software. The results mentioned that the area using the shading device in the form of a terrace or balcony with a canopy (horizontal or curve overhangs), either stand-alone or continuously upward like Portico in the Mediterranean style shows good performance in reducing the incoming heat. And that type of shading device is found in 6 of 9 house samples which indicate that this type of shading device can potentially be applied to various styles with modification of shapes according to each style.
Evaluation of risk quality control in construction company
Authors: Kurniawan A , Latief Y
Published: March 2021

Risk becomes one of the unexpected things that can happen and causes the project target not to be achieved according to the plan. Risk is a situation where there is uncertainty and the level of uncertainty can be measured quantitatively and can cause loss. This study aims to identify dominant (high) risk in the quality control process, especially in construction projects, which can result in not achieving the output indicators of the Project Quality Management Process according to the Project Management Body of Knowledge (PMBOK) 6th edition 2017 and steps to be taken to improve the existing Quality Management System against dominant (high) risk. The method used in this study are literature review and archive analysis, expert validation, pilot survey and respondent questionnaire. The results of this study found that there were 3 dominant (high) risks that affected the implementation stage of quality control, namely the error of contract document review, multiple interpretations of contractual material (equipment and material specifications) and the contents of contract documents (addendum). Steps taken to improve quality control related to the dominant risks found include developing procedures related to employee competencies in particular the project team and updating existing procedures related to Contract Administration.
Innovation in application of green infrastructure for rural development
Authors: Rochman G P , Odah O , Chofyan I , Afiya I U
Published: March 2021

This paper explains the innovation in village development through the integration of green infrastructure development and local culture. In the rural development discourse, culture is explained as a factor that is able to bring solidarity and a shared desire in encouraging rural development. Much research describes innovation but examines the green development and local culture separately. This study aims to explore how the application of green development in the village with its cultural uniqueness as an innovation for environmental sustainability. In order to understand the complexity, we used a qualitative research in a single case study approach and applying an in-depth interview with the key informants. Then, the qualitative content analysis method is used by studying and analyzing communication systematically and objectively to the messages. We found that the culture behind the implementation of green development. The material and process of building cultural infrastructure emphasize the preservation of the surrounding natural environment. This innovation survives as an effort to preserve the environment and develops as an educational and cultural tourist attraction in rural development Thus, environmental sustainability is able to realize by innovating in infrastructure development that is integrated with the culture of the community.
Identify of Occupational Health and Safety (OHS) cost component for Flyover Project by developing of safety plan based on Work Breakdown Structure (Case study: Erection girder using tandem crane)
Authors: Nicodemus A M , Latief Y
Published: March 2021

Occupational, Health, and Safety (OHS) issues in Indonesia are still often overlooked. It appears that the number of work accidents is still high. Therefore, in early 2018 the government has decided to suspend all the elevated construction projects in Indonesia including Flyover Project. It causes negative impacts such as casualties, material, time, cost, etc. Two factors that most hinder OHS implementation in the project based on the contractor’s point of view are the high cost of OHS implementation and the safety cost provided for OHS implementation by the owner is inadequate or even none at all. Safety cost planning can be done accurately if the activities based on the Work Breakdown Structure (WBS) on the project can be well defined. The Activity-Based Costing method provides more accurate information especially on complex structures while can provide information on cost items. This study aimed to identify the OHS cost component of the Flyover Project based on standardized Work Breakdown Structure in erection girders application using the tandem crane, which is supported with archival analysis, expert judgment, and survey to obtain a decent budget and specifically allocated for the implementation of OHS to improve working safety conditions.
Comparative analysis of soft soil consolidation time due to improvement using Prefabricated Vertical Drain
Authors: Zhafirah A , Permana S , Daris M , Yogawsara D
Published: March 2021

Construction built on soft soils will cause several geotechnical problems, one of which is a consolidation settlement that lasts for a long time due to the low permeability of soft soils. This study aims to compare the time of soft soil consolidation settlement before and after soil improvement using Prefabricated Vertical Drain (PVD). PVD is a plastic sheet made from a composite, consisting of a drain core and filter jacket with a function to accelerate the process of pore water discharge to the ground surface by shortening the horizontal waterway. The method used using analysis, where the time of consolidation settlement reaches a degree of consolidation of 90%. The PVD pattern used is a triangle pattern and a rectangular pattern with a distance variation of 0.6 m; 0.7 m; 0.8 m; 0.9 m; 1.0 m; 1.1 m; and 1.2 m. The results obtained, based on the PVD pattern, the time of consolidation settlement is faster if using a triangle pattern compared to the rectangular pattern. Whereas, based on distance, the smaller the distance between PVDs, the faster the time of consolidation will decrease.
The effect of soft clay improvement using Prefabricated Vertical Drain (PVD) for rigid pavement structure
Authors: Syahril S
Published: March 2021

Rigid pavement is widely used in subgrade conditions that have low bearing capacity so that it will affect the life of the road plan and rigid pavement performance. Soil improvement that can be done is by using Prefabricated Vertical Drain (PVD). Soil consolidation with plate load test is carried out to get the modulus of subgrade reaction. Modulus of subgrade reaction without PVD is 2179,24 kN/m2/m and with PVD distance of 100 mm is 11311,09 kN/m2/m. The modulus of the verified subgrade reaction without PVD is 22419,21 kN/m2/m and with PVD is 38718,40 kN/m2/m. The thickness of the analyzed plates are respectively of 150 mm, 200 mm, 250 mm, 300 mm, and 350 mm. The position of the vehicle wheel load is in the middle, the end, and the edge. The deflections due to the position at the middle, the end, and the edge loads respectively for the entire plate thickness are reduced by an average value of 31%, 34%, and 33%. Rigid pavement performance based on the modulus of subgrade reaction and deflection caused by MST 10 ton vehicle loads with a 1.2 axis configuration shows that soil improvement using PVD can increase the modulus of subgrade reaction and reduce deflection values.
Study of Oos River Basin characteristics for sustainable water availability
Authors: Eryani I G A P
Published: March 2021

Oos River Basin is one of the perennial river basin in Bali, whose water potential is widely used as raw water and irrigation water mainly for the Gianyar Regency. Even though it has great water potential, according to the BWS Bali-Penida (2012), 18.84% of its area is classified as critical land and 81.16% is classified as very critical. If it is not managed in an integrated manner, then this will have an impact on the sustainability of existing water availability. This study will examine the characteristics of river basins that are very important to be used to determine the condition of the river basin and how to maintain the sustainability of the existing water potential. The data needed in this research is Oos river basin boundary map data, Oos river basin river network map, topographic data, land use and maps of soil types. The results of this study will be in the form of Oos River Basin characteristics and river basin management recommendations for the sustainability of its water potential.
LACIKU game education to increase student learning interest
Authors: Al-Anwary A M , Ikhtiati I , Siregar N , Verliyanti V
Published: March 2021

This research aims to test out the ‘LACIKU’, an abbreviation of ‘Langkah Cita-Citaku’ or My Dream Step, as a learning media to increase the learning interest of Grade IV students of a Madrasah in Jambi. This is Research and Development relies on the Borg and Gall’ model. The steps taken in this study include collecting potential and problem data, product design, design validation, design revisions, product trials, product revisions, trial use, product revisions and mass products. LACIKU media was assessed as validated by 1 thematic learning expert with a score of 93.33%, 1 media expert with a score of 89.6%, 1 material expert with a score of 100%, 1 linguist with a score of 88%, 4 small group trial students with a score of 90%, and 22 students on trial use or large group trials with a score of 97.38%. Based on the analysis of differences in student learning interest between those who do not use LACIKU media and students who use LACIKU media with an independent t-test, the Sig. (2-tailed) of 0,000 <0.05 so Ha is accepted and Ho is rejected. It can be concluded that the learning interest of students who use my lacquer play media is significantly higher that is an average of 85.22273 when compared to the learning interest of students who do not use my lacquer play media ie their learning interest is only 60.9091.
Rapid Application Development (RAD) model method for creating an agricultural irrigation system based on internet of things
Authors: Nalendra A K
Published: March 2021

The development of the internet of things has penetrated in several lines, including in agriculture. To respond to the development of this IoT requires rapid technological adaptation as well. To build a system quickly, one can utilize the Rapid Application Development (RAD) method. RAD is a model that allows non-experts to benefit from high-performance computing, while allowing expert programmers to take full advantage of the underlying hardware. This enables rapid prototyping, retargeting, and reuse of existing software, while allowing hardware-specific optimization if needed. The RAD system emphasizes the fast development cycle that is designed and high-quality results from other methods such as waterfall, agile, scrum and others. The system was built using the minimum NodeMCU system with the help of a soil moisture sensor. The use of the RAD method in building an IoT-based agricultural irrigation system gives good results in testing all functions and equipment controls. The average delay level on testing IoT devices is around 4.6 seconds so that the RAD method can be used as a reference in the construction of an IoT-based system.
Implementation of firewall for web server access management based on application gateway for TNI AD website
Authors: Suryana M L N , Muda N R S , Minggu D , Agustiady R , Herkariawan C
Published: March 2021

Along with the development of information technology, making information security is very important even more so on a network connected to the internet. The imbalance between each development of a technology not accompanied by development in the security system itself. As for the current problem is that there are still state website that are still working with outside companies in terms of network security systems. And most often the target of cyber attacks is the web server. Then any individual or organization is required to have a security system that minimizes of cyber crime. Instead of putting trust in an outside company I better make my own web server security system. The author uses the application gateway method in a firewall. Besides, firewall failover capabilities are evaluated. Based on the overall testing results, application gateway has better performance than other types of firewalls in another website. It has better ability in handling DoS attack, because this firewall works not only based on the secure, destination and attribute of the package, but can reach the contents of the package. It is conclu1ded that application gateway is suitable and safe to use on TNI AD web server.
Technology implementation to promote digital learning
Authors: Latif M A , Widiaty I
Published: March 2021

Interactive learning environment (ILE) is one of the keys of successful learning; one of which is triggered by an effective selection of technology implemented. This paper aims to investigate technology implementation promoting digital learning to be able to create ILE. A variety of digital platforms are identified. It has been found that such platforms as virtual environment, digital games, web-based learning platforms, virtual labs/simulations, mobile devices, robots, and social networks are effective technology to promote effective digital learning and ILE. It is implied that effective digital learning and ILE is most likely to meet the requirements of the industry.
Multimedia simulation model for electrical laboratory learning
Authors: Sriadhi S , Restu R , Sitompul H
Published: March 2021

Industrial revolution 4.0 demands universities to improve the quality of their graduates. This study aims to find out the improvement of basic engineering competencies through practical learning which is divided into three groups, namely Regular group, Regular-VLabs and Remedial-VLab group. Practical topics are summarized on AC circuits with resistor loads, inducers and capacitors on series and parallel systems. Data analysis using One-way Anova test for comparison of practicum learning outcomes and practicum effectiveness was analysed by gain-score comparison. The results of the study prove that the competence of practicum results in RL-circuit and RC-circuits is high but for RLC-circuit is quite medium. Based on the form of practicum, the competency achievement of the V-Lab group is higher than that of Regular group. The study also proves that the gain score states Regular-VLab are more effective than Regular and Remedial-VLab group. The research findings recommend the use of a V-Labs simulation program for basic engineering practicums especially for laboratories that lack equipment and instructors in an effort to improve basic electrical competency.
Application of Interval Type-1 Fuzzy Inference System to analyze the quality of memorization Qur’an
Authors: Jamaaluddin J , Nisak N M , Astuti R , Syahrorini S , Ahfas A
Published: March 2021

In this modern world, the use of artificial intelligence needed. One of the intelligence methods raised in this study is to use the Interval Type-1-Fuzzy Inference System (IT-1-FIS). In Muslim schools (Madrasah Ibtidaiyah) where there is subject matter memorizing the Qur’an. The fluency determines the quality of memorization of the Qur’an in pronouncing letters (Input-1), Tajweed Rules (Input-2), and reading fluency (Input-3). These three points become input for forecasting Memorization Quality Of The Qur’an. IT-1-FIS requires primary inputs and rules to obtain the output of forecasting Memorization Quality Of The Qur’an. By using IT-1-FIS, it can predict that students will get the quality of memorization based on the trace value obtained on each point. So from the beginning the teacher will know the quality of a student’s memorization in the future. The estimated condition in memorization of the Qur’an can be known faster, and the teacher will be able to increase the points that are less to get the desired quality of memorization of the Qur’an by the habits practiced by students. These students’ patterns are the basic rules of input in the IT-1-FIS process.
Teaching English tenses in an informal cooperative study group using smart multimedia and gamification
Authors: Sourav A I , Lynn N D , Suyoto S
Published: March 2021

English is an international language that dominates in almost every sector of human activity. Despite learning English as a foreign language from elementary school, Indonesian students still face difficulties in speaking and writing correct English even during their higher levels of education. Researchers claim that traditional English teaching methods have failed to motivate students to keep constant attention. As a result of less engagement in the learning process at an early stage, students end up facing understanding issues. This study aims to introduce a mixed method of teaching tenses in English grammar. This combined teaching approach focuses on increasing motivation, performance, and developing a competitive mentality among students. The method applied is using smart multimedia along with gamification in an informal cooperative learning group. The findings indicated that using gamification and smart multimedia in an informal cooperative learning group increases student performance, motivation, and gives satisfaction to students in the learning process.
Development of learning media for basic techniques and strategies in playing multimedia-based football
Authors: Bima A C A , Thaib F , Suyoto S
Published: March 2021

Media is an instrument that is needed in the learning process to help achieve learning objectives. One of them is in learning about basic techniques and strategies in playing soccer. To be able to play soccer properly and correctly, it is certainly necessary to have good basic technical skills. In Madiun City, Football is one of the sports fields that are in great demand, ranging from early childhood to adulthood, however, there are still many soccer enthusiasts who do not understand or master the basic techniques of the game of football. This is due to the lack of information and the limited time and place that are factors to learn these techniques. Therefore, in this research, the writer will discuss the development of multimedia-based learning media for playing basic techniques and strategies in playing football using QR Code-based applications and KAHOOT as user evaluation media, the design of developing instructional media development is expected to help to motivate users in learning basic techniques and also tactics for playing soccer.
Combining decision making algorithms to improve accuracy of the course assessment rank
Authors: Hay’s R N , Muttaqin Z , Maylawati D S , Ramdhani M A
Published: March 2021

Assessment activity is important to keep the quality of student’s knowledge. This study aims to combine decision making algorithms to improve accuracy of the course assessment activities rank to evaluate the student’s knowledge automatically. This study use Analytical Hierarchy Process (AHP) and VIšekriterijumsko KOmpromisno Rangiranje (VIKOR) as decision making algorithms. AHP and VIKOR are Multi-Criteria Decision Making (MCDM), where VIKOR is compromise ranking method that is expected to improve the accuracy of the ranking results. AHP and VIKOR algorithm which are combined in this study are named AVI. The experiment result with 6 types of assessment as criteria shows that AVI capable to increase the accuracy value of assessment ranking result until 1.75 times more accurate/higher percentage than using AHP or VIKOR only. This result has implications for the similar research of decision support systems, for different case studies, it can be applied the AVI combination method to improve the accuracy of ranking results.