bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of geological and technological factors on the efficiency of hydraulic fracturing
Authors: Shakurova Al F , Shakurova Ay F 
Published: November 2019

Abstract
Using correlation analysis, the authors assess the impact of geological and physical, geological and technological properties on the technological effect in the development of fields using hydraulic fracturing. The dependence of technological effect of hydraulic fracturing from the quality of casing string annulus fixing is also considered. The analysis of technological efficiency of regular technology of hydraulic fracturing in conditions of JSC TATNEFT showed its insufficient level due to the lack of methods which take into account the impact of geological and physical, geological and technological factors. The study of correlation relationship between field results of hydraulic fracturing and reservoir properties established quantitative geological field criteria for its effective use, which allowed to make a more informed choice of objects of impact.
Motivation towards energy saving by means of IoT personal energy manager platform
Authors: Zhukovskiy Y , Batueva D , Buldysko A , Shabalov M 
Published: November 2019

Abstract
The article presents a study of implementations of information technologies for energy saving. The study provides an analysis of cloud platforms used in the energy sector. Most platforms are used to increase equipment load factors, diagnose it, or integrate the energy infrastructure of individual systems into large systems. The article discusses the role of man in the process of improving energy efficiency. As a result of the research, it is found that the user’s connection to energy saving will act as a significant motivation. The proposed cloud platform focused on the personalization of energy actions will create the prerequisites for the formation of a smart consumer. The article describes the structure and functionality of the system. As a result of the platform implementation, the user will be able not only to reduce his bills for energy, but to see the real effect of his actions in the overall balance.
Decision-making process modeling for occupational safety management system based on a fuzzy analysis of production incidents
Authors: Semeykin A Yu , Kochetkova I A , Klimova E V , Nosatova E A , Drozdova A O 
Published: November 2019

Abstract
The article proposes a decision-making model using a fuzzy analysis of production incidents for various factors. For the analysis, a database of factors of industrial incidents that occurred in the Belgorod region in 2007-2017 is used. The model is based on a quantitative assessment of the degree of belonging of the current value of the state parameters to each of the scenarios of severity of consequences at the corresponding point. This model is implemented in an expert decision support system for occupational safety and risk management. The use of such systems allows one to provide multivariate analysis of occupational injuries and occupational risk factors and to identify groups of workers for whom the level of occupational risk exceeds acceptable values.
L-Sol – heating system with PVT-collectors as single heat source for a brine-water heat pump
Authors: Schubert Maike , Hunziker Manuel , Sauter David , Sperr Nadia , Rohrer Jürg 
Published: November 2019

Abstract
The building sector has a huge potential for reducing greenhouse gas emission without the need of a higher sufficiency. The key is to build and retrofit buildings with good envelopes as well as choosing efficient heating systems. A heating system with a brine-water heat pump and PVT collectors as single heat source is suggested here as an alternative to an air-water heat pump system for single family houses. In the system simulations performed, the PVT-heat pump System (“L-Sol”) is more efficient than an air-water heat pump system and still affordable. As the System L-Sol produces heat and electricity on the same area it saves space, disadvantages like noise emission of air-water heat pumps or costly drilling of bore holes are omitted. The system has been optimized in terms of efficiency by testing different dimensioning of the components and regarding the grid purchase by optimizing the system control.
Slim building envelopes using vacuum glazing and high-performance insulation
Authors: Wakili Karim Ghazi , Stöckli Thomas , Rädle Wolfgang , Uehlinger Urs 
Published: November 2019

Abstract
To get a slim building envelope with low thermal transmittance, and hence a low energy consumption, vacuum glazing and high-performance insulation material have been combined. Preliminary investigations both experimental and numerical have been carried out to determine thermal, hygric and mechanical properties of these building components according to either existing standards or to best knowledge procedures. This includes measurement of the center-of-glass U-value, the simulation of the influence of support pillars on the glass surface temperature and comparison of measured and calculated results. Several specimens were measured under different temperature gradients to get more information about accuracy and deviation in the production of the vacuum glazing elements. Further, mechanical stability of larger specimens was tested by the standard pendulum tests for flat glass and compared to identical tests on conventional double-glazing elements of the same size. Finally, a one-dimensional hygro-thermic analysis has been conducted to determine the temperature and moisture distribution within a thin wall construction containing high-performance insulation when submitted to climatic conditions in the Swiss Midlands.
Ternary diagrams SiO2-Al2O3-K2O as tool for the analysis of ceramic materials behavior
Authors: García-León R A , Flórez Solano E , Rodriguez-Castilla M 
Published: November 2019

AbstractThe present study about ternary diagrams of SiO2-Al2O3-K2O has been conducted from the determination of two possible optimal clay mixtures through hydrometric tests of a company dedicated to the manufacture of masonry products for construction in the North region of Santander in Colombia; this work is the continuation of others carried out previously. In this raw material (clay) the dominant minerals are silica, alumina, iron, potassium, among others, which provide the plasticity and adequate granulometric distribution. Two optimal m7 and m8 mixtures were selected from 5 samples (M1, M2, M3, M4 and M5) of clays from different points of the company’s mine, these mixtures were analyzed by Fluorescence and X-ray diffraction tests with the purpose of determining the chemical elements in their maximum percentage and to be able to graph them in ternary diagrams with the help of FACTSAGE software and finally determine their cooking behavior. The results of the investigation showed that the physical characterization of the clays provides a broad view on the technological behavior of the raw material and consequently the quality of the final product.
Development of savonius type windmill prototype as a learning medium about wind power plants
Authors: Markumningsih S , Purwantana B , Gulo J C 
Published: November 2019

Abstract
One of the renewable energy sources that can be used as a driving resource is the wind. Wind energy can be converted into energy in other forms, for example mechanical energy or electrical energy through wind turbines. One of the most developed wind turbines is the savonius type which includes the vertical shaft type. The investment cost for making a real wind turbine in the field is very expensive so it cannot use trial and error methods to get efficient turbines. Research to develop wind turbines is done by making a prototype of a laboratory scale wind turbine. The part of wind turbines are made in a small size so that the mini wind power plant can operate and on the other hand does not cost a lot. From the prototype parameters can be observed that affect the performance of the wind turbine. The windmill prototype was made 200 cm high and 50 cm in diameter and equipped with 4 blades. For testing in the laboratory using a wind source from the fan which is driven by an electric motor that can be adjusted by the rpm. The determination of power efficiency is applied by the turbine ability to absorb the energy of wind as represented by torque and rotational speed of turbine attacked air flow in testing. The result shows that efficiency of the savonius turbine were 5,02% - 9,12%.
Determining casson yield value, casson viscosity and thixotropy of molten Chocolate using viscometer
Authors: Cahyani A , Kurniasari J , Nafingah R , Rahayoe S , Harmayani E , Saputro A D 
Published: November 2019

Abstract
Flow properties of chocolate highly determine mouthfeel and consumer acceptance. Aside from these, they are also important factors in determining the incorporation of chocolate in food products. This work investigated the possibility of using viscometer to determine the flow properties of molten chocolate. The data obtained from viscometer was fitted to Casson Model. Afterwards, Casson yield value and Casson viscosity were then derived. To observe the homogeneity of molten chocolate, thixotropy value was also determined. In this study, molten chocolate was produced using a stone melanger as an alternative processing method. Four grinding durations, namely 4, 8, 12, and 16 hours, were used to produce 4 types of dark chocolate. The results showed that viscometer was able to determine the value of Casson Model parameters, eventhough the shear rate reached was only approximately 45 s−1. Using this approach, it can be observed that the Casson Yield Value and Casson Viscosity increased as the grinding durations were increased.
Physical characteristics of instanised Cocoa drink sweetened with Palm Sap Sugar: A preliminary study
Authors: Dyaningrum E F , Lutfiyah R A , Diasti D R , Karyadi J N W , Saputro A D 
Published: November 2019

Abstract
Palm sap sugar is a natural sweetener made from sap collected from the flowers of several species of palm tree. This sugar is highly produce in South-East and South Asian regions, such as Indonesia, Philippines, Thailand, Malaysia and India. Its use improves the taste, colour and aroma of drink and food products. This work investigated the impact of palm sap sugar and processing method on the solubility and appearance of instanised cocoa powder. In this study, three cocoa powder blends with different palm sap sugar proportion, namely 15%, 30%, and 45% were used as a sweetener. The results showed that the solubility of cocoa drink increased as the proportion of palm sap sugar was increased. With regard to the appearance, the lightness of the cocoa drink decreased as the proportion of palm sap sugar was increased. This study revealed that the lightness of the cocoa drink decreased and the solubility increased as the number of agglomeration process repetition was increased.
Implementation of life cycle assessment on production of Fresh Pasteurized Milk
Authors: Supartono W , Isman M , Yuliando H 
Published: November 2019

Abstract
Cow fresh milk is managed and milked by dairy farmers then it is collected at Cooperation of Milk Farmers Warga Mulya. It is processed to pasteurized fresh milk and packed in plastic cup of 160 ml. Whole activities are influenced by scale of ownership, type of milking process and energy use for conducting activities. The objective of this research was to implement Life Cycle Assessment (LCA) on fresh pasteurized milk production. Some parameters were considered; milking technique and number of cows at every farmers. The LCA is a method to calculate the environmental impact of fresh pasteurized milk production. The samples were 10 farmer members. The process was started from milking at farmers, picking up the fresh milk, receiving milk at Cooperation, then milk processing or pasteurization. All energy, waste and others were collected, calculated, analyzed and then determined into environmental effect category. The results showed, that the energy use for carrying out all activities was reached by 3.8284 MJ/l. The highest emission was gained by pasteurization process released 47.3869 g/l CO2 equivalent, 0.0564 g/l SO2; 0.4823 g/l NOx and 0.0025 g/l CH4. The highest impact to environment was contributed by pasteurization process as follow; Global Warming Potential (GWP) 87.6969 g CO2 equivalent; Acidification Potential (AP) 1.6827 g SO2 equivalent and Eutrophication Potential (EP) 0.7246 g NOx- equivalent.
Rice Husk Fuel Pellet: Characterization on Physical and Thermogravimetric (TGA) Combustion Properties
Authors: Widjaya ER , Triwahyudi S , Rosmeika  , Harsono  
Published: November 2019

Abstract
Recently, the demand for biomass fuel pellet is increasing leading to the use of agricultural waste as the feedstock alternative to the wood pellet. In this study, the rice husk was developed into fuel pellet and characterized its physical and combustion properties. The pelleting used a flat-die roller type pelleting machine. The pre-treatments were reducing the size and mixing with a 4% gelatinized tapioca starch as the binder. The single pellet had an average diameter of 8 mm, length of 28.7 mm and weight of 1.8 g/pellet. The rice husk bulk density increased from 145 kg/m3 in raw form into 511 kg/m3 in pellet form. There were no significant different changes in pellet dimension after 14 days of pelleting. The combustion properties were analyzed using thermogravimetric analyses (TGA). The TGA analyses were conducted using oxygen at a flow rate of 50 ml/min; the heating rates were 10°/min, 20°/min and 30°/min heated up to 950°C. This study found that the ignition and the burnout temperatures were at about 276°C and 448°C, respectively. As to the non-woody characteristic of higher cellulose than woody biomass, the rice husk pellet had a higher conversion rate at lower temperatures than that of wood pellet.
Development of integrated machine for tillage, corn planter and fertilizer application
Authors: Harsono  , Budiharti U 
Published: November 2019

Abstract
Challenge in the expansion of maize and soybean planting areas is the limited agricultural labor from land processing activities, planting to post-harvest. Considering that the corn and soybean cultivation systems are still traditionally done using both human and livestock power so that the productivity and work efficiency produced is still low. This affects the area of land that can be cultivated, land productivity and the production of corn produced. To support the program to expand the planting area and increase the crop index to increase corn production, it is necessary to support the use of appropriate mechanization technology and under site-specific conditions. Therefore it is necessary to introduce agricultural machinery to support the corn cultivation system to increase productivity, work efficiency, increase yields and improve the quality of results. In this activity the implementation and development of mechanization technology for corn and soybean cultivation is appropriate and by site-specific conditions at the demonstration plot scale in the corn and soybean production centers by taking into account the technical, economic, and socio-economic conditions of the local community. Indonesian Center for Agricultural Engineering Research and Development has developed a rotary and planting machine that can do soil treatment and planting seeds at once. This machine is equipped with a solid fertilizer application. But in practice, farmers rarely use liquid fertilizer for corn/soybean cultivation. Test results of tillage and planting of corn seeds: Work depth of 12.1 cm; spacing in rows 38.5 cm; spacing in rows of 70 cm; number of seeds per fall 2.2 items; percentage of empty holes 4.1%; work width is an average of 162.88 cm; average working speed of 2.31 km / h; average work capacity of 4.08 hours / ha; fuel consumption of 20.32 lt / ha
Eichornia crassipes Potency as Hyperaccumulator Macrophyte in Phytoremediation of Acid Mine Drainage Containing Zn
Authors: Alifa D , Moersidik SS , Priadi CR 
Published: November 2019

Abstract
Under present investigation, Eichornia crassipes (water hyacinth) has been tested in knowing the applicability of this macrophyte as phytoremediator of Acid Mine Drainage (AMD). Atomic Absorption Spectrometry (AAS) is utilized in analysing the accumulation of important heavy metal zinc (Zn) within plant tissues parallel with adaptive responses due to physiological and biochemical matters during exposure of actual AMD and artificial AMD having different concentrations (10, 20, and 30 mg/L of Zn) and extreme pH (3.0). There is slow-but-steady significant increase in pH along with no morphological symptoms in exposure of artificial AMD. Conversely, in 2-weeks exposure of actual AMD there is critical morphological symptoms due to its toxicity in exposure of multi-metals along with immediate increase in the first 3-days and slow decrease in 11-days after for pH value. The decreasing in Zn concentration for both actual and artificial AMD is occurred even in high level concentration. The final concentration of Zn did not meet the quality standard, so it needs to be a serial treatment with each treatment has 3-days in retention time. Overall this methodology is applicable for the removal of Zn in AMD that has single-metal or various-metals in any amounts that is negligible or under its lethal dosage.
Analysis of heating system on fluidized bed dryer for corn
Authors: Sukmawaty  , Hardiansyah  , Priyati A , Setiawati DA , Syahrul  
Published: November 2019

Abstract
This study aims to determine the heat produced from the heating system of the fluidized bed dryer on corn drying process and to calculate the thermal efficiency of the heating system. The method used was experimental with three variables of biomass of 3.5 kg, 4 kg and 5 kg. The corn initial moisture content of around 22% is used and the heating equipment used are a biomass furnace and heater. The parameters in this study are temperature, material moisture content, and thermal efficiency of heating system and biomass furnace. The biggest thermal efficiency of heating system at air velocity 12.19 m/s and material mass of 3.5 kg at 14.93%. The value of thermal efficiency of the largest biomass furnace system at air velocity 12.19 m/s and 3.5 kg material mass of 74.68%.
Assessment of the air quality parameter at Melaka: Jonker Walk and Surrounding Area
Authors: Ashraf Razali Nurul , Nurdiyana Wan Mansor Wan , Abdullah Samsuri , Albani Aliashim , Fakhratul Ridwan Zulkifli Mohammad , Sabri Mohd Ghazali Mohd 
Published: November 2019

Abstract
Melaka has been ruled by Portuguese, Dutch and British and well known with its historical background. Melaka also becomes an attraction for tourism; thus give positive impacts to local economies. Tourist, bus driver and the traders working along the main roads are amongst the people who affected with air pollution. In this study, data was collected at the Jonker Walk and surrounding area using VelociCalc/Q-trak 7575 by TSI. The measurement was taken at every 1-minute data for an interval of 60-minutes along the route. Data for carbon monoxide (CO) were measured using electrochemical method, while carbon dioxide (CO2) were measured using non-dispersive infrared (NDIR) technique. Other data such as temperature and relative humidity were also measured using the same instrument. Findings showed that the concentration of CO2 was the highest from 6.00 pm to 7.00 pm with a concentration of 934 ppm. The maximum median was found from 7.00 to 8.00 pm with 350 ppm, which was in the range of the ASHRAE limit. The highest value of CO was observed from 7.00 to 8.00 pm at 8.6 ppm with a median of 1.25 ppm. The 1-hour averaging time showed low concentration for CO level at 1.953 ppm which was below the acceptable limit of 35 ppm. Statistical analysis showed that there is no correlation between CO2 and CO. Moderate relationship exists between CO2 and temperature, CO and temperature and CO and humidity.These findings provide useful information for the tourists during their Melaka visit.
Thermal comfort study at Dewan Sultan Ibrahim, UTHM
Authors: Kamarul Aini M S , Wan Noor Hanani W Z , Mohd Arif R , Nor Haslina H , Nur Aini M A , Haris Fadzillah H 
Published: November 2019

Abstract
Thermal comfort is very important, especially in an auditorium. This study focusing on the sensation of thermal comfort at Dewan Sultan Ibrahim (DSI), UTHM. A person’s perception of thermal comfort is affected by environmental and personal parameter. The objectives of this study are to determine the responses of occupants regarding thermal comfort at DSI, field measurement on environment parameter, and compare with Industry Code of Practice on Indoor Air Quality 2010 (ACT 514) by DOSH (ICOP IAQ 2010 (Act 514)), Code of Practice on Indoor Air Quality for Air-conditioned Building (SS554:2009) Singapore (COP IAQ Singapore (SS554:2009)), and America Society of Heating, Refrigerating, and Air- Conditioning Engineers Standard 55-2010 (ASHRAE Standard 55-2010). Measurement was done by using 4 in 1 Meter Kit device, while the subjective measurement was carried out by distributing questionnaire. Measurement of environment parameter shows the average temperature of 24°C and relative humidity, 65.17%. Metabolic Rate is 1.0 met and average clothing insulation is 0.49 clo. Based on the analysis of Predicted Mean Vote (PMV) and Percentage People Dissatisfied (PPD), the occupants perceived their thermal conditions as comfortable.
Analysis of indoor environment condition towards thermal comfort level in an air-conditioning office building
Authors: Safwan Md Jasman Md Eirfan , Ngah Nasaruddin Afiqah , Tuan Tee Boon 
Published: November 2019

Abstract
Office workers spend most of their time indoor with average of eight hours spent inside the office buildings. Therefore, the indoor environment condition will be one of the factors contributing to comfort level inside the building. Since air conditioning system is commonly used to maintain the indoor condition, the selection of appropriate and right capacity of the system is crucial. The purpose of this work is to conduct an analysis of the indoor environment condition towards the thermal comfort level inside office building. The case study building for this study is the Chancellery Building of Universiti Teknikal Malaysia Melaka (UTeM) which is installed with the central air-conditioning system. The thermal condition was measured by using the thermal microclimate instrument. The parameters involved in this study include air temperature and humidity. Based on the data measurement, the temperatures were range between 25.7 °C to 26.2 °C while the humidity recorded is between 68.1% to 70%. Comparing with ASHRAE Standards 55 and ASHRAE Standards 62.1 the thermal and humidity condition fall outside of the comfort range.