Land use change in Merbau and Ukui Watershed (DAS) as an effort to fulfill the need of land for settlement and other supporting infrastructure in Pekanbaru city will increase the potential of erosion and sedimentation in the watershed. This impact will have a major impact on the functional life of lake khayangan. Geographic information system is used to assist data analysis of land use, length …
The aggressive environment, especially the peat environment contains many chemicals that can unravel the elements in the concrete, causing damage to the concrete. This study examines the strength and physical properties of OPC (Ordinary Portland Cement) concrete and OPC RHA (Rice Husk Ash) concrete exposed in peat environments. RHA as one of pozzolan with high silica is used as a replaceme…
The sluice gate is a hydraulic structure that used for controlling the discharge on irrigation canal. Their discharge coefficient depends on geometric and hydraulic parameters. Swamee (1992) presents two formulas for calculating the discharge coefficient (Cd) for free flow and submerged flow based on Henry’s Curve (1950). Laboratory models used to find out the flow phenomenon that was formed …
Indonesia is one of the countries that located in the quake zone. But not all earthquakes that occur is a devastating earthquake. Some earthquake parameters that affect the level of damage from a building structure are the peak ground acceleration, response spectrum value, earthquake duration, and earthquake frequency content. The earthquake frequency content parameters were considered the most…
Stroke is a major cause of death and disability worldwide. Representation of inflammatory marker with stroke severity had been vastly researched, but measure of these markers was limited by minimal resources and facilities. Neutrophil Lymphocyte Ratio (NLR) is a low cost and easy marker to measure. Meanwihle to score severity degree we can use NIHSS. This study was descriptive with cross sectio…
Wildfire is a fire that occurred in the forest and can occur intentionally or not. in Hunan (China) has occurred 55 spots of wildfire From July 1 to August 4 2013. According to the data by national aeronautics and space administration (NASA) on platform fires global forest watch fires (GFW fires), half of the fire hotspots warning in Riau occurred in protected areas or forest moratorium area. A…
Urinary tract stone is the third most found disease in the Urology cases, other than urinary infection and Benign Prostatic Hyperplasia. The purpose of this reseach is to know the review of Extra Corporeal Shockwave Lithoripsy (ESWL) and Ureteroscopy with Ureterolithotripsy therapy on renal and ureteral stone patients in Arifin Ahmad General Hospital from 2010 to 2016. This research is descript…
The purpose of this research is to utilize the waste of palm oil with investigating the mechanical properties. The waste materials are the result of palm oil extraction. The experiment conducted to investigate the effect of this material over compressive strength, absorption, porosity, and setting time. The content of palm oil waste which added to normal concrete are varieties which are 0%, 2%,…
Bleaching Earth is the one of the materials used in the process to refine the palm oil and also increasing every year. Related on this, this research aims to obtain the characteristics of concrete using Spent Bleaching Earth (SBE) as a substitution material on normal concrete. This research is aimed at compressive strength, setting time, and flexural strength towards concrete. Percentage of SBE…
The selection of heavy equipments are vital to the sustainability of a project. The choice of heavy equipments is appropriate so that the project work goes according to plan. Culpability in the choice of heavy equipments will result in ineffective and efficient project management. This research is aimed to analyze and identify the cost of heavy equipments usage on the reconstruction Pariaman-Ma…
The waste of palm know as waste of palm oil extraction, which is recently available abundantly. One of efforts in using this waste material is as additive in paving block industry. This research presents the efficiency of waste of palm oil extraction as an additive material of paving block at optimum mix composition regarding the paving block compressive strength, absorption and resistance to c…
Road constructions require heavy equipments in their operations. Some heavy equipment miselects in the field are very influential toward low productivity, additional time and additional cost. The purpose of this research was to obtain the minimum time and cost in terms of HPS Owner and contractor`s heavy equipments planning in the field. The heavy equipments which were used are dump truck, exca…
Stone column is a digging and replacement effort undertaken to replace soils to be used as base of construction with compacted vertical columns. In this research, column with fly ash and bottom ash mixtures with 40% fly ash and 60% bottom ash is used.The columns are used as reinforcement of peat soil with triangular pattern. Variations used are 3 cm, 4 cm, and 5,5 cm in diameter (D) with spaces…
In organizing building construction especially in Pekanbaru, cost factor is a mainly considered factor due to its relation with the great number of investment for owner. Therefore, project`s cost needs to be well-managed in order to minimalize the possibility of overrun cost. The purpose of this research was to discover the rate of validation, and to analyze the most dominant factor which has t…
Clean water obtained by the community District Mempura is still minimal. This is of course caused by many factors such as reservoir and flow in pipes. The water flow in this pipe which will be the author's review is the loss of energy in the flow of raw water transmission pipeline Water Supply System (WSS) District Mempura using EPANET 2.0 software with 3 (three) alternative transmission pipes …
Travel time estimation is one of the parameters to predict a journey for traveler who want to travel. The travel time in this research using Moving Observer Car that regulated by Bina Marga No. 001 / T / BNKT / 1990. This method is classified into Direct Method to determining the travel time. Moving Observer Car method using test equipment in the form of cars with the number of 8 units. The ave…
A good and efficient generating system is essential to meet the growing demand for electricity. Stability is required in the generation process to work properly and optimally. One of which is by controlling the frequency in the turbine-generator of a power plant, for example PLTU (Electric Steam Power Plant). Turbine-generator is one of the important parts in generating industry that functions …
One of abnormal conditions that may happen when operating synchronous generator is overheating at armature winding. Therefore, this condition is needed to overcome to avoid further damage in the generator by designing and implementing smart relay based overheating protection. Temperature at armature winding is as an input of the smart relay where it was measured by using LM35DZ sensor. Magnetic…
Electrical energy is one of the most important and often used energy in life. To maintain the availability of electricity, it takes a power company to manage the electricity needs. One of the things that affect the reliability of the equipment is need to know the configuration of the electrical equipment protective device. As known that transmission line is very vulnerable to lightning strikes …
Electronic devices efficiency is highly considered nowadays. One of the reasons caused low efficiency is power dissipation. Conventional Boost Converter has low efficiency, but there are some potentional areas need to be improved. Synchronous Boost Converter is the improved method of Boost Converter to improve the Conventional Boost Converter efficiency. Design and simulation is supplied by 12V…