bluuebunny/crossref_metadata_2025_split huggingface dataset:
Performance Test of a Diesel Engine with Biodiesel from Kemiri Sunan (Rutealis sperma.)
Authors: Muhaemin M , Kramadibrata A M , Nurjannah S , Makarim I , Saukat M , Herwanto T , Prijatna D , Handarto  , Rosalinda S , Mardawati E , Natawigena W H 
Published: November 2019

Abstract
With decreasing fossil oil reserve, alternative plant-based fuel become more important. One of the source of such fuel is kemiri sunan (rutealis trisperma). Kemiri sunan has an advantage that it is not competing for food use. Biodiesel from kemiri sunan needs to be tested on diesel engine. The objective of this research was to test the performance of a diesel engine with a mixture of biodiesel from kemiri sunan and fossil-based diesel fuel. This study was conducted in an experimental-decriptive manner by using several level of mixture of biodiesel from 0% (B-0) to 70% (B-70) using dynamometer. Measured parameter were torsion, power, fuel consumption, thermal efficiency and flue gas emission. Experimental results showed that biodiesel from Kemiri sunan can be used in unmodified, conventional diesel engine with maximum content of 20% (B20).
A dynamic botanical air purifier (DBAP) with activated carbon root-bed for reducing indoor carbon dioxide levels
Authors: Hashim N H , Teh E J , Rosli M A 
Published: November 2019

Abstract
Indoor Air Quality (IAQ), is important in buildings because it can affect an occupant’s health and productivity. Carbon Dioxide (CO2) is a main indicator of IAQ. 4 decades ago, researchers discovered the potential for indoor plants to remediate indoor air pollutants via photosynthesis. This study investigates the CO2 removal rate when a Maranta Leuconeura is paired with activated carbon (AC), as well as a mechanical ventilation system that draws air into its root-bed making it an active system (DBAP). The results were compared to passive systems i.e plant with AC, potting soil etc. The study was conducted in a 0.7 m3 Plexiglas chamber with initial CO2 concentrations of 1500±100 ppm while initial temperatures ranged between 24 ± 2°C for a duration of 6 hours continuously. Results showed, the DBAP reduced CO2 levels by 40.90% while a passive plant with AC only, was able to lower CO2 levels by 15.20%. The other passive systems did not reduce CO2 levels. All systems were able to raise humidity and reduce temperature in the chamber, with the exception of the DBAP, which slightly increased the temperature in the chamber.
Recovery of silica and carbon black from rice husk ash disposed from a biomass power plant by precipitation method
Authors: Thongma B , Chiarakorn S 
Published: November 2019

Abstract
In Thailand, air pollution caused by rice husk ash (RHA) disposed of biomass power plants has become more serious concerns. Recovery of silica and carbon black from RHA is an attractive solution to solve this problem. This study aims to extract silica and carbon black from RHA, which was burnt in a stoker firing at 800-850 ºC, by a precipitation method. RHA was dissolved in 2M sodium hydroxide at 105 ºC for 2-5 h. After that, carbon black was filtered out from sodium silicate solution. The solution was then precipitated by sulfuric acid to produce precipitated powder. The extraction parameters such as types of RHA (fly ash and bottom ash), dissolution time and precipitation time were studied. The precipitated powder was characterized by XRF for elemental analysis, XRD for crystallinity and BET for porosity analysis. The results showed that dissolution for 4 h and precipitation for 1 h could produce precipitated amorphous silica with the purity of 95-99 % SiO2. The yields of silica extracted from bottom ash and fly ash were 85.66 wt% and 72.33 wt%, respectively. The yields of carbon black extracted from bottom ash and fly ash were 14.34 wt% and 27.67 wt%, respectively. The surface area of silica extracted from fly ash (410.72 m2/g) was higher than that of the silica extracted from bottom ash (296.98 m2/g).
Mineral resources of the south of Kemerovo region (Tashtagol administrative district)
Authors: Gutak Ja M , Gutak O Ya , Tokarev V N 
Published: November 2019

Abstract
Tashtagol administrative district of the Kemerovo region is located in its southern part occupying the up-streams of the Mras-su and the Kondoma rivers. Deposits of the Late Precambrian (Vendian) and the Paleozoic (Early Cambrian), which are relics of oceanic carbonate platform, youthful and mature island arc, form geological structure of the territory. The sequence is broken through by intrusive bodies, of which plagiogranite intrusions of the Late Cambrian (skarn deposits of iron ore) are of the greatest impact for metallogeny of the region. Analysis of regional mineral resources begins with a survey of reserves and resources of ferrous metals (iron, manganese), then resource potential for noble metals and non-metallic minerals is considered consistently. Iron has historically been the main mineral resource of the region, but as of the present, prospects remain only for the Tashtagolskoye deposit. The gold placers has practically been exhausted, development of the Selezenskoye manganese deposit has been stopped due to complexity of its geological structure. Other diverse deposits of metallic and nonmetallic minerals are practically not explored, framing reserves for the future.
Intellectual property as an intangible asset of coal mining enterprises
Authors: Nikitenko S M , Mesyats M A , Korobeynikova E V 
Published: November 2019

Abstract
The article is devoted to the analytical study of the value of intellectual property in the activities of coal mining enterprises (companies) of Kemerovo region. The authors test the hypothesis that knowledge-intensive technologies are considered by coal mining enterprises (companies) to be their intangible assets and should constitute a significant share in the overall structure of assets.
Development and substantiation of parameters of multifunctional mobile roof support
Authors: Klishin V I , Malakhov Yu V 
Published: November 2019

Abstract
The paper describes the technical parameters and requirements for the basic element of longwall systems for mining thick and steeply dipping seams and for extraction of coal from safety pillars. The proposed multifunctional mobile roof support ensures safe and efficient operation of mines in complicated geological conditions. The authors offer classification of the performance capabilities of the multifunctional mobile powered roof support.
On improving the energy efficiency of electric mining excavators
Authors: Malafeev S I , Malafeev S S 
Published: November 2019

Abstract
The main directions of increasing the efficiency of using energy resources in mechatronic systems of mining excavators are considered. The main factors affecting the energy efficiency of excavators in quarries are the characteristics of the rock, the quality of the explosive preparation, the organization of the mining and transport complex, the characteristics and condition of the equipment, the geological conditions, the qualifications of the driver, etc. Improving circuit solutions and components allows to change ideological principles of the construction of mechatronic systems and provides the possibility of a significant increase in energy characteristics. The highest energy efficiency is achieved when using AC drives with asynchronous motors for excavators. The current issues of improving the power supply system and reducing the loss of electrical energy in the supply networks are considered.
A new approach to predictive modeling of dragline equipment
Authors: Gerike P B , Klishin V I 
Published: November 2019

Abstract
This paper is an attempt to generalizing analytical data on vibration parameters of powered mechanical equipment of draglines with a view to solving the problem connected with development of unified diagnostic criteria for short-term degradation modeling aimed at prediction of technical degrading of test objects. The goal of this study is to colligate experimental data on parameters of vibration generated in operation of dragline equipment with intent to classify signs of the equipment defects into reference groups for convenient formalization. This research used the expanded range of diagnostic methodologies, including spectral analysis in broadened frequency and dynamic ranges, analysis of runout characteristic, excess and analysis of spectrum envelope. The research findings prove efficiency of the proposed methodology for normalization of mechanical vibrations and the algorithm for creation of unified diagnostic criteria usable as basic elements in the system of mining machinery maintenance by the actual technical condition.
Study of the properties of flux cored wire based on dust from gas cleaning plant of ferrochrome for surfacing on the cutting bodies of tunneling machines
Authors: Kozyrev N A , Usoltsev A A , Kryukov R E , Belov D E , Prudnikov A N 
Published: November 2019

Abstract
The possibility of producing flux-cored wires based on dust from gas cleaning plant of aluminum production, silicon and aluminum powders (as a reducing agent) and gas cleaning dust from ferrochrome production (as a reducible component – chromium oxide) was studied. In the laboratory conditions samples of flux-cored wires were produced, surfacing, hardness measurement, abrasion rate and metallographic studies were performed.
Low-pressure hydraulic impact on the coal massif and the purpose of its application
Authors: Zykov V S , Filatov Yu M , Ivanov V V 
Published: November 2019

Abstract
The purpose of the application of low-pressure hydraulic impact on the coal massif is discussed. A brief description of the coal structure is given – from molecules to large structures separated by endogenous and exogenous cracks. The fractured porous structure of the coal seam is described. Information on micropores, transitional and macropores, systems of exogenous cracks is given. The results of the performed studies indicate the possibility of blocking gas in coal pores with pumped water and preventing high pressure of free gas near the plane of seam exposure, which opens up the prospect of hydraulic action on the massif to prevent gas accumulation in the workings and sudden outbursts of coal and gas. It was established that the most effective mode of injecting water into the seam to achieve this goal is low-pressure water infusion, and its parameters were defined by experimental studies. The results of theoretical and experimental studies showed that with low-pressure water infusion, coal becomes less durable and elastic and more plastic. The coal massif adjacent to the mine or contoured by several mine workings loses the ability to brittle fracture, and the arising loads are largely realized in the form of plastic deformations that do not lead to rock bumps.
Improvement of degasification efficiency by pulsed injection of water in coal seam
Authors: Plaksin M S , Rodin R I 
Published: November 2019

Abstract
The authors discuss the known degasification methods and their efficiency. The ways of stimulating productivity of coal degassing are proposed. In particular, stimulation of methane recovery by water injection in coal seam in pulsed mode for generation of additional surface of gas release is described. Prediction of methane recovery relies on the modern knowledge on state of methane in coal.
The formation procedure of scenarios on mining waste processing: environmental and social aspects
Authors: Shorokhova A V , Novichikhin A V , Yuryeva E N , Bystrov V A 
Published: November 2019

Abstract
The formation procedure on scenarios of processing waste generated by mining enterprises was developed. It consists of seven stages and takes into account the design capacity of the enterprise, the chemical composition of a technogenic deposit, remoteness from residential areas and consumer requirements for product quality. The proposed procedure combines technologies for waste processing and land reclamation in accordance with the regulatory requirements of the legislation, consumers and society interests. The developed procedure ensures the reduction of environmental damage as a result of the technogenic impact of production and the improvement of the life quality of the population in mining areas.
Double layered home-based enterprises: case study in Kampung Lio, Depok
Authors: Putri F E , Adianto J , Turpuk Gabe R 
Published: November 2019

Abstract
Struggling to fulfills economic needs in between the rapid growth of urbanization, one of the trend happened in Kampung Lio, Depok, Indonesia is to rely on informal economic activities such as Home-Based Enterprises (HBE). As HBE become an important topic in informal housing and economic activities, the existing literature has discussed HBE and its implication to spatial strategies. However, in Kampung lio a unique case has risen where the locals are renting HBE for another layer of HBE, making a double-layered HBEs occurred in one housing. This type of HBEs limited movement space for domestic activities inside the house. However, since the activities always happened, the activity spaces will appear with various ways of modifying the use of space inside and through the house. By doing site observation and empirical data collecting, this research aims to examine how the locals modifying domestic activities and spaces and using a certain type of HBEs until the double-layered HBEs emerged. The expected results are to understands how the houses are modified and the activities pattern as they adapt to the change of living spaces in a double-layered HBE in Kampung Lio. This later could be used to serve as the inspiration for designing low-income housing with home base enterprise and public spaces in the urban kampong.
Linkages between capital structure policy and Malaysian real estate investment trusts property portfolio enlargement
Authors: Jalil Rohaya Abdul , Sapri Maimunah , Ping Tiong Chai 
Published: November 2019

Abstract
The superiority of real estate investment trusts (REITs)’tax regime which gives tax waive provided REITs distributed 95 percent of earning to unit holders, had limits its potential to expand in term of its property portfolio enlargement (PPE). This study aims to determine the links between capital structure policy of Malaysian REITs (M-REITs) and PPE agenda. Adopting a descriptive analysis and deployed a ten years data of M-REITs, this study reveals that there is an opposite relationships between debt-to-equity ratio (D/E) and the average increase percentage of property total value (AIPPTV). This study indicates that as D/E grows, there will be a resistance in PPE agenda. This explains the poor size of M-REITs properties total value, which 58 percentage of it is less than RM1 billion. This study suggests M-REITs should plan their PPE financing option as the cost of debt (kd) advantage when lower interest rate imposed. There other factors influence REITs PPE such as the quality and the performance of properties, properties diversification in term of property type, geographical and size, institutional ownership of the property, externally managed managers and issue of cash flow of majority unitholders in REITs.
Factor of building orientation direction as determinant the thermal comfort quality
Authors: Rilatupa James 
Published: November 2019

Abstract
Generally determines the comfort quality of rooms in the building is due to the air temperature caused by solar radiation, humidity and air movement inside the building. A comfortable room influenced by the volume of space, wide opening in the wall, use of materials, patterns of shadows and vegetation around the building. But the specific factors that can impact directly on the quality level of comfort rooms in the building that is the building position with a different orientation direction. Standard guidelines thermal comfort for the humid tropics to be achieved is at the limit of 24°C < T <26°C. Thermal comfort research was conducted in a pilot house in the Faculty of Engineering, Christian University of Indonesia (FT-UKI), Cawang, East Jakarta. The thermal comfort research lasts for 2 (two) months. Indoor air temperature in the pilot house of FT-UKI does not meet the requirements of thermal comfort standard for each building orientation direction during the research. But on average, building orientation direction were relatively convenience in this research is northwest - southeast, it also minimizes design of engineering and construction to the surrounding environment.
Electrodecolorization of remazol violet with graphite electrodes : Application Of Statistical Designs And Regression Analysis
Authors: Fatimah S , Wiharto W , Fatoni R 
Published: November 2019

Abstract
The electrodecolorization process of the remazol violet (RV) dye using graphite as an electrode has been done well. The RV is one of the synthetic dyes that are often used in the textile, paper, and other coloring industries. The parameters used in this study were RV concentration (20 mg/L-100 mg/L), pH (2-10), electrodecolorization time (2 minutes-20 minutes), volume H2O2 (0 mL-12 mL) and voltage (2 V-12 V). Based on experiments of 20 data that have been investigated then made the design of statistical model. The application of statistical design and regression analysis in this research is tested the feasibility, then tested by building data based on experimental data as amount 87319 data. This design is supported by ANOVA test, RMSE value, and ADD as the strengthening of the resulting model. Based on this study, the optimum conditions for pH parameters, electrodecolorization process time, H2O2 volume, RV concentration and voltage are 4;10 minutes;10 mL;20 mg/L; and 2V with a percentage of decolorization of 83.50%. The p-value results of the ANOVA test, the RMSE value, and ADD sequentially from this study are 0.002; 0,000; 0.201 so that the resulting model can be recommended for the application in dye waste management.
The effects of catalysts type, molar ratio, and transesterification time in producing biodiesel from beef tallow
Authors: Coniwanti Pamilia , Surliadji Larasati , Triandini Dita 
Published: November 2019

Abstract
The high level of air pollution from combustion emissions and the lack of petrodiesel feedstock sources becoming a problem that can not be ignored. Therefore, to overcome these problems researchers developed alternative fuels that are environmentally friendly such as biodiesel. Biodiesel is produced through a transesterification reaction that reacts vegetable oils or animal fats with an alcohol assisted using an alkaline or acidic catalyst. This research was conducted to find out the influence of catalyst type, molar ratio of alcohol and fat, and transesterification reaction time to the yield and the characteristics of biodiesel produced. The transesterification reaction takes place at 65°C, and the catalyst weight is 1.5% by weight of beef tallow. Variations of catalyst type are NaOH and MgO, methanol molar ratio of 6:1, 9:1, and 12:1, and transesterification time for 1 hour, 2 hours, and 3 hours. The results showed that the optimum condition of the reaction using NaOH catalyst, molar ratio 6:1, and time for 1 hour with yield value 43,64%, density 0,84392 gr/ml, viscosity 5,7057 cSt, flash point 113,5°C, calorific value 9296,9 cal/gr, acid number 0,00992, and sulfur content 39 gr/kg.
Transit oriented development of light rapid transit palembang
Authors: Della Rhaptyalyani Herno , Pataras Mirka , Adhitya Bimo Brata 
Published: November 2019

Abstract
Light Rapid Transit (LRT) is one of the public mass transport which is necessary to break the problem of the urban transportation system in developing countries. LRT has many promises in the development of the city, in addition to solving the transportation problem is an increase in economic activity. This current case study of the paper is Palembang, one of the cities in Indonesia; the government develops mass public transport to solve the transportation problems. The government planned LRT construction to optimize the development of demand for public transport. This paper studies the concept of LRT construction by the development of Transit Oriented Development (TOD), include the development of estate management at stations area. The concept of Transit Oriented Development (TOD) for the develop stations location to spur the growth of economic activity around the locations. This concept needs to analyze the socio-economic impact study to determine the feasibility of developing TOD level especially at stations and the land use impact of the construction of LRT. Survey of Palembang City land use shown that 23 location can use as stations. The analysis by the impact of the socio-economic condition, land use, and feasibility of LRT construction; present that there are 13 locations can be used as TOD and shown as stations of Palembang LRT.
Prediction of carbondioxide emissions from crude palm oil industry case study: Palm Oil Mill X in Kampar Regency of Riau Province
Authors: Ayo Sasmitra , Reza Muhammad 
Published: November 2019

Abstract
The effects of solar radiation that are trapped in Earth’s atmosphere, because these events take place repeatedly, then there is accumulation of solar radiation in the earth’s atmosphere that causes the temperature on earth to become warmer. One of the industrial sectors that contribute to greenhouse gas emissions in Indonesia is the palm oil mill. Indonesia is one of the largest producers of crude palm oil in the world. Palm oil agribusiness invites national and global attention related to environmental issues because they’re one of major contributor to greenhouse gas emissions. The research will be conducted on one of the existing Palm Oil Mill in Riau Province. The Mill that sampled is located at Kampar Regency. Primary data was obtained through field observation and interview with company employee. While the secondary data is obtained from the company’s regular reports and the relevant literature. From this research, the total emissions generated from the palm oil mill X are 1,405.83 Kiloton CO2 equivalent/year, with the largest emissions coming from the use of boilers in POM X which account for 81 % of total emissions of 1,138.77 Kiloton CO2 equivalent/year.
Level of service for roads with motorcycle lane or without motorcycle lane in Denpasar
Authors: Mulyadi Agah 
Published: November 2019

Abstract
Denpasar is the capital of Bali and the main gateway to the island. The increasing number of vehicles in Denpasar City reach 7 % annually. The negative impact of the high number of motorcycles is decrease of road performance, especially causing low travel speed and high potential of traffic conflict. To minimize that problem, motorcycle lane was applied to make homogeneity movement of motorcycles in the city of Denpasar. The methods by analysed of road performance on the motorcycle lanes by using MKJI 1997 (Indonesia Road Capacity Manual). The analysis shows that the application of motorcycle lane has an influence to improvement road traffic. That is indicated by the VCR value for road with motorcyle lane facilities are 0.42 and 0.54. Meanwhile without motorcycle lane is 0.34 and 0.43. The level of service on Puputan Rd, Cok Agung Tresna Rd and Sudirman Rd (north direction) is “B”. Its mean traffic flow is stable, but travel speed began to be limited by traffic conditions. Meanwhile on Sudirman Rd (south direction), the level is service mostly is C. Its mean Traffic flow is stable, but the travel speed and vehicle movement is controlled.