bluuebunny/crossref_metadata_2025_split huggingface dataset:
Scientific substantiation of the technological scheme of robotized mine with the use of underground hydraulic mining equipment
Authors: Fryanov V N , Pavlova L D 
Published: November 2019

Abstract
This article analyzes and evaluates the possibility of improving the technology of underground coal mining, taking into account the achievements of the basic sciences, robotics and digital technologies in recent decades. According to the results of the analysis, it was established that at present the deposits of coal seams suitable for open-cut mining are almost completely exhausted by the industry. One of the ways to increase the volume of coal mining is the gradual replacement of the open-cut mining by manless underground method with remote control of mining processes and maximum use of digital technologies and wireless communication. Hydraulic technology is the most adaptive to manless underground excavation. The technical means for constructing the technological scheme of hydromine of a new generation and the technological requirements of the excavation robot for underground manless coal mining were substantiated.
Numerical simulation of interaction of methane filtration and rock massif deformation during mining of methane-bearing seams
Authors: Fryanov V N , Pavlova L D , Petrova O A , Shiryaev S N 
Published: November 2019

Abstract
This paper presents the results of the first stage of theoretical research and mathematical modeling of interaction of geomechanical and filtration processes in methane-bearing coal-seams when mining them in gravitational and non-uniform geotectonic stress fields. Comprehensive studies were carried out on the basis of numerical modeling of geomechanical and gas-dynamic processes with adjustment of the input parameters of the mathematical model based on the results of mine measurements. According to the results of numerical modeling, the features of the residual strength distribution of the coal seam to the original one, displacements, vertical and horizontal stresses, methane pressure in the rock mass at different coefficients of lateral pressure in the undisturbed geomassif and in the zone of influence of the gob are revealed. It also presents the results of computational experiments for determining the geomechanical and gas filtration parameters in the rock massif with different options of the boundary conditions and the spatial position of the workings.
Waqf private property trust fund as property unlock initiative
Authors: Jalil Rohaya Abdul , Yaacob Ahmad Che , Omar Ismail , Sipan Ibrahim@Atan , Ridza Badrul Hisham Mohd , Fadzli Siti Zulfarina 
Published: November 2019

Abstract
The abundant of Waqf land (WL) administrated by State Islamic Religion Council (SIRC) are growing over the years unsolved. The location of these WL are strategic and capable for commercial benefits through property development investment project. Yet, the development funds’ constraint restraints SIRC to develop the WL’s potential. This study examine the structure of management of indirect real estate investment (IREI) instrument and carried out a benchmarking comparison analysis to suggest a workable IREI to unlock WL potential. But, concept of Waqf prevents sub-sale of Waqf ownership exchange transaction. While, private property trust fund (PPTF) is a close fund and distribute dividend. This study suggest a conceptual idea Waqf private property trust fund (WPPTF) as mechanism for WL unlock initiative. The structure of management of WPPTF is different since Waqf unit holders whom cash donor would not receive any investment return, instead SIRC as a caretaker of Waqf properties benefit all investment return. The acceleration of Waqf property potential would be useful for investment project development of more frozen WL.
Microwave assisted ZnCl2 activation of salacca peel derived activated carbons as adsorbents for Cu(II) removal from aqueous solution
Authors: Arie Arenst Andreas , Kristianto Hans , Atin Jessica , Arifin Christiandi 
Published: November 2019

Abstract
In this present study,salacca peel based activated carbons (SPAC) were prepared by microwave assisted ZnCl2 activation method. The effects of microwave power, activation time and impregnation ratio on the characteristics of activated carbon were studied. The activated carbons were characterized by N2 adsorption-desorption and scanning electron microscopy (SEM) instruments. The BET surface area of 1796 m2/g were obtained at a microwave power of 540 W, activation time of 25 minutes with an impregnation ratio (ZnCl2:salacca peel) of 4:1. The resulting activated carbon was used for removal of Cu(II) from aqueous solution. The prepared activated carbons were then used as adsorbents for removing Cu(II) metal ions from aqueous solutions. The adsorption equilibrium was investigated using using Langmuir, and Freundlich model equations. It was found that the adsorption equilibrium data followed the Langmuir isotherm equations with maximum capacity of 1262.62 mg Cu(II)/g SPAC at room temperature. The adsorption kinetics were also studied using the pseudo first order, pseudo second order and intraparticle diffusion models. The adsorption kinetics was shown to fit well with the pseudo second-order kinetic model.
Treatment of batik wastewater using plant derived surfactant-enhanced ultrafiltration membrane
Authors: Aryanti N , Nafiunisa A , Irmalasari L N , Nisa I M K , Wardhani D H 
Published: November 2019

Abstract
Saponin extract from pericarps of Sapindus rarak DC is utilized to replace synthetic surfactant in the surfactant-enhanced ultrafiltration process. The process conducts to treat real batik wastewater. The extraction by maceration methods was performed in the various ratio of solute to solvent. The extract with proper calculation is used in the wastewater treatment process in various CMC concentration. The highest yield is obtained at solute to solvent ratio of 1:40 (w/v). The flux value of solution without saponin is higher than the one with saponin addition.The flux value is decreased by the increase of saponin concentration on the feed solution. Thelowest average flux value of 31.35 L/m2.h was obtained from the feed solution with saponin concentration of 2 times CMC. Both processes with and without the addition of saponin exhibit permeate flux declined over time. This is due to the interaction of saponin molecule with the pollutant where the pollutant is covered by saponin molecules. The membrane performance shows that saponin is successfully worked to solubilize or bounded the heavy metal molecule, dyes molecules, and other pollutants on its micellar structure. This is proved by the decrease of Cr and COD concentration after the ultrafiltration process enhanced with saponin. Saponin at the concentration of 2 times CMC giving the best result with lowest Cr and COD concentration of 18.3 ppm and 108.4 ppm, respectively, and highest rejection of Cr and COD of 95.88% and 96.91% respectively.
Adsorption processes based activated carbon from waste biomass and its application as a raw material ceramic membrane wastewater in processing kain songket
Authors: Dahlan Muhammad , Saleh Abdullah , Prahady S , Tan Azizah 
Published: November 2019

Abstract
The main environmental problem in the textile industry is the waste from the dyeing process. Heavy dye and heavy metals are water pollutants. The most widely used method in water treatment is filtration using membrane technology. Membrane technology has several advantages, such as separation process that can occur at room temperature and its use is not destructive. In this research will be made membrane with basic forming material such as bentonite, clay (clay), activated carbon as additive in filtration process. The activated carbon used is made from avocado seed which is carbonized with a temperature of 500°C for 1 hour. This research is used to know the influence of flow rate and the best time of contact with ceramic membrane during the treatment of songket wastewater and to know the result of ceramic membrane use with different type of active carbon raw material to the treatment of songket liquid waste which can fulfill the condition of the waste water ready dispose of by water quality standard. Parameters examined TSS, BOD, COD, PH, and turbidity. The contact time used during the filtration process is 30 minutes, 60 minutes, 90 minutes, 120 minutes and 150 minutes. As for the flow rate used 3L / min and 5L / min. From the result of the research, it is known that the best result of waste samples with 150 minutes contact time and 3L / min flow rate.
Evaluation on the Mechanical Properties of Steel-Fiber Concrete at Elevated Temperatures
Authors: Purwanto  , Antonius  , Setiyawan Prabowo 
Published: November 2019

Abstract
This paper presents experimental results on mechanical properties of steel-fibre concrete burned at high temperatures, which consists of tensile strength, modulus of elasticity and flexural modulus. The steel-fibre usage is limited to 0.5% of concrete volume. The reviewed parameters in the evaluation include compressive strength of normal to high-strength concrete, and temperature (normal, 300°C, 600°C, 900°C). The specimens are heated up after it reached 120 days of age. Experimental results toward mechanical behaviour indicate that tensile strength tends to decline linearly at 300°C and 600°C respectively. The value of modulus of elasticity and flexural modulus of fibre-reinforced concrete heated at 300°C, 600°C and 900°C tend to decline linearly. The results of the experimental evaluation also proposed a model for tensile strength degradation equation, modulus of elasticity and flexural modulus against temperature.
Integration of Digital Elevation Model (DEM) and HEC-RAS Hydrodynamic Model for flood routing
Authors: Tunas I G , Arafat Y , Azikin H 
Published: November 2019

Abstract
The development of computer technology, especially the hydrodynamic modeling package, provides convenience in many things including flood modeling in the river. One of these modeling packages is HEC-RAS Hydrodynamic Model which can be used to simulate both steady flow and unsteady flow. On the other side, the development of Geographic Information System (GIS), is now rapidly evolving for a variety of purposes with a wider range of fields and scope, including the preparation of river geometry data based on Digital Elevation Model (DEM) in Triangulated Irregular Network (TIN) format as the input of the model. The aim of this study is to perform flood routing for determining the river capacity and for estimating the factors that cause floods by integrating TIN data into HEC-RAS Hydrodynamic Model, using Lantikadigo River in Central Sulawesi, Indonesia as a model. In this river, almost every year flooding occurs with fluctuating intensity of inundation. Integrating data is the process of synthesizing geometry data that is processed in the GIS environment as input for the HEC-RAS Model. Data integration provides the effectiveness of the use of simulation time due to input geometry data is done using import data facility when compared manually input geometry data. The results of the study show that the maximum water level of the 1-year return period has exceeded the river bank elevation both on the left and on the right side of the entire segment. The peak discharge of hydrograph for 1-year return period is 55.3 m3/s at the outlet of Lantikadigo Watershed. This means that the average channel capacity is far below the peak discharge. Based on simulation results it can be predicted that the cause of flooding in Lantikadigo River is due to morphological change of river geometry.
Drivability analysis based on the mathematical model of soil flow resistance
Authors: Widjaja B , Utama R , Saerang D S S 
Published: November 2019

Abstract
When a pile is driven, the soil around the pile reaches a critical condition. This results in a failure condition for the soil, which then moves as a viscous element. The flow is caused by the external driving force exceeding the static resistance of the soil. When the failure condition is reached, the dynamic resistance of the soil will counter the penetrating force of the pile. The rheology model is accurate in representing the soil flow when the critical condition is reached, because the parameters used for the mathematical model of soil flow resistance represent static and dynamic resistance. The dynamic resistance is influenced by the shear viscosity of the soil, which was determined using the Bingham and Casson models. Discrepancy exists between the analytical output used in the mathematical model of soil flow resistance and the actual result. Therefore, a correction factor is needed to calibrate the displacement of the pile.
Study on tropical organic soil stabilization based on biogrouting
Authors: Widjajakusuma J , Sugata M , Changgrawinata A , Jap L , Zacharia A , Tan T J 
Published: November 2019

Abstract
Biogrouting is a new environmental friendly stabilization method to stabilize soft soils by applying microorganisms. The microorganisms produce CaCO3, which fill voids of soil particles and bond the particles. This work studied biogrouting of high plasticity tropical organic soil applying Bacillus subtilis bacteria. In order to study the effectiveness of biogrouting using Bacillus subtilis, unconsolidated undrained triaxial and direct shear tests were conducted on the untreated and stabilized soils. The curing time for the stabilized soil specimens were 7, 14 and 28 days before the tests were conducted. In order to study the influence of the amount of Bacillus subtilis, 6 ml and 12 ml of Bacillus subtilis liquid culture was injected into the soil specimens. The soil became stronger as the amount of Bacillus subtilis used increased. The results indicated that the longer curing time and the higher amount of Bacillus subtilis reflected better soil improvement in term of cohesion, friction angle and shear stress. After 28 days of curing time, injection of 6 ml and 12 ml Bacillus subtilis liquid culture increased the effective stress cohesion values by 180% and 270%, respectively.
Identification of types and important value of aquatic vegetation and their potential to improve water quality in irigation canals of Mulyasari Village, Banyuasin District
Authors: Yuanita Windusari , Septiani Wiwik 
Published: November 2019

Abstract
Irrigation has an important role as a source of irrigating rice fields. Irrigation water is often contaminated by waste from anthropogenic activity. Indications of pollution in irrigation channels because the use of pesticides or other chemicals in agricultural land can be observed based on the number and type of vegetation that grows in the irrigation canal. Vegetation that grows in these waters is also believed to have the potential to improve the quality of water as phytoremediation. This study aims to determine the characteristics of vegetation, identify species that grow around the irrigation canals, and calculate the importance of aquatic and riparian vegetation in the irrigation channels of Mulyasari Village, Banyuasin Regency and analyze the potential of aquatic and riparian vegetation. to improve water quality. The method used to determine the station in this study is purposive sampling method. Vegetation analysis was carried out at 4 station points, research was conducted at low tide.. A bamboo quadrate plot having measurement of 1m x 1m with a perpendicular stake is used for data collection on aquatic vegetation, its type is observed and recorded. The results of the study found 6 types of vegetation, namely: Eleucharis dulcis, Hydrilla verticillata, Nymphae alba, Swersia hexandra Sw, Eleucharis acicularis, and Eleusine indica. Aquatic vegetation is dominated by flowering vegetation with linear leaf type. This study also shows that aquatic or riparian vegetation such as Eleucharis acicularis are the species that dominate canal waters with the highest Important Value Index is 46.51-81.22%, while Eleusine indica is a type of vegetation that tends to be rarely found (the average important value index is 10.86-19.84 %). Based on this, it was concluded that aquatic vegetation such as Eleucharis acicularis, which was found in the irrigation channel was the dominant vegetation in the canal. This vegetation has the potential as a phytoremidiation agent because of its role in maintaining the balance of the aquatic ecosystem so that it can improve the quality of water and can also be used as organic fertilizer, biofilter, and absorbent toxic elements. Eleucharis dulcis can improve the quality of water during the dry season by absorbing toxic dissolved ompounds.
Analysis the Potential of Fire and Explosion at Secondary Reformer as Processing Unit in Ammonia Plant
Authors: Lestari R A , Rodhiyah Z , Fitrada W , Handika R A , Oginawati K 
Published: November 2019

Abstract
Increasing of fertilizer industry in the world made the increasing of ammonia industry as well. Ammonia was used as nitrogen source in fertilizer industry. Ammonia process production involved natural gas (flammable) with high temperature and high pressure in the process. Secondary reformer was the one of process unit plant in ammonia plant that had high temperature and pressure. Secondary reformer was the one of the unit process used to get hydrogen (H2) from natural gas. Hazard identification for secondary reformer was conducted by using Fault Tree Analysis (FTA). The results of FTA analysis for secondary reformer could be grouped into technical and non technical aspects. Non technical aspects had 76% possibility in fire/explosion at secondary reformer. Analysis using Dow’s Fire & Explosion Index (DFEI) resulted that the radius effect due to secondary reformer explosion was 74 meter. The actual probable property damage was US$ 11.649.269 and probable daily outage at least 129 days. Software ALOHA (Arial Location of Hazardous Atmospheres) resulted that the lowest effect of secondary reformer explosion, 0,5 psi, that could shattered the glass was 62 m in radius. Moreover, the radius effect for 1 psi explosion strength (made house/office inhabitable) was 41 m from secondary reformer.
The effect of gypsum plafond waste on shear strength of soft clay soil
Authors: Rustam Reffanda Kurniawan , Resti Ayu , Purwanto Herri , Muhammad Firdaus 
Published: November 2019

Abstract
One type is soft clay soil which has a low compressibility and high water content that causes the carrying capacity of the soil to be low. In this research, soil improvement was carried out chemically by soil stabilization method using a mixture of gypsum plafond waste with a percentage of 5 %, 10 %, 15 %, 20 %, and 25 % in a laboratory scale. Soft clay samples used for the study were taken in the Pakjo area of Palembang, South Sumatra. The use of gypsum plafond waste as a mixture was expected to increase the shear strength of soft clay. Tests carried out include testing Direct Shear. Based on the USCS classification, the soil was classified as CH and based on AASHTO classification was A-7-6. The value of wop is 22 % (optimum moisture content) and the value of γdmax is 1.74 gr/cm3 (maximum dry weight). The maximum cohesion (c) value is 24.20 kPa from 15 % mix of gypsum plafond waste (WPG15) sample. For the maximum value internal friction angle (ϕ) is 16.36 °C from 5 % mix of gypsum plafond waste (WPG5) sample. The maximum shear strength (τ) is 26.57 kPa from 5 % mix of WPG15 sample.
Mechanical properties analysis of reactive powder concrete with curing temperature variation
Authors: Saloma  , Hanafiah  , Agistin Veriza 
Published: November 2019

Abstract
A Reactive powder concrete is one of Ultra High Performance Concrete developed through microstructure repair. This research uses silica fume and steel fibre with w/c = 0.23. The curing temperature variations used in the study were 27°C, 60°C, 90°C, and 120°C. Testing methods slump flow, compressive strength, modulus of elasticity, tensile strength and flexural strength were performed based on ASTM and ACI. This research shows that the compressive strength, modulus of elasticity, tensile strength and flexural strength are directly proportional. The optimum temperature of the study was 90°C. The compressive strength and maximum modulus of elasticity this study were 111.43 MPa and 51,400 MPa at curing temperature of 90°C. Tensile strength and maximum flexural strength in this study were 6.19 MPa and 10.82 MPa at curing temperature of 90°C.
Experimental investigation of long interlocking brick column subjected to eccentric load
Authors: Hao Yew Zhi , Saggaff Anis , Tahir Mahmood Md , Ngian Shek Poi , Sulaiman Arizu 
Published: November 2019

Abstract
The Industrialized Building System (IBS) is referred as advanced construction technique which involved the prefabrication of construction components in controlled environment and then installed on site. It promotes faster, neater, safer, easier and cheaper construction works in future. Interlocking Brick (Blockwork System) is one of the IBS which has not commonly known in Malaysia. The key objectives of this research are to investigate the compressive strength of long interlocking brick column with cement mortar and SikaGrout®-215 filler under concentric and eccentric load, in addition to study its failure mechanism and compare the experimental result with existing design code. Four number of 2.3 -meter height column was built by using interlocking brick with Y12 steel bar and different filler and performed compressive strength test and the result is compare with the existing design code which is Eurocode 2 and BS 8110. From the research, Interlocking brick column with cement mortar filler had lower compressive strength capacity compare to column with SikaGrout®-215 under concentric and eccentric load. In term of failure mechanism, the column samples were failed by sudden crushing of interlocking brick. For column sample with grout, the percentage of difference of BS 8110 and Eurocode 2 modified equation compare to the experimental result is 10.20% and 12.56% respectively under concentric load. Moreover, for column sample with mortar infill, the percentage of difference is 67.16% for BS 8110 and 73.23% for Eurocode 2. For eccentric load, Eurocode 2 did not provide reasonable agreement where the percentage difference is range from 66.40% to 482.47%. The optimum design of interlocking brick column in this study is the column sample with SikaGrout®-215 as it has higher compressive strength compare to Type M cement mortar.
Mapping of Municipal Solid Waste Transportation System, Case Studies Seberang Ulu Region Palembang City
Authors: Putri Septi Rika , Muda Khalida Binti , Alia Febrinasti 
Published: November 2019

Abstract
One of the human activities that affect the state of the environment is the domestic waste disposal. Palembang with economic growth and rapid population does not have adequate solid waste management, which is characterized by wild rubbish heaps in several locations, one of which is in the region Seberang Ulu. The results of this study show that the volume of solid waste generated in the research area by 2.98 liters/person/day. In planning for the needs of solid waste transportation systems, solid waste reduction activities such as solid waste bank unit and the 3R system (TPS 3R) need to be considered, with a target of solid waste reduction was 20%. Solid waste reduction can ultimately extend the life of the landfill. Projected needs garbage container (capacity 6 m3) and garbage trucks (capacity 8 m3 with 5-6 rit/day) in 2027 was 166 and 25 units, with the requirement of solid waste reduction in solid waste bank and 3R unit 29.93 m3/day. The volume of solid waste generated is directly proportional to the increase in population, and solid waste reduction greatly influenced the community’s active role as a producer of garbage.