bluuebunny/crossref_metadata_2025_split huggingface dataset:
Review of consolidation test on peat soil of Batubara Regency Sumatera Utara Province
Authors: Roesyanto  , Ramayanti A 
Published: June 2020

Abstract
Organic soil is soil that has organic content which influences soil characteristic. Peat soil has high water content, high void ratio, low bearing capacity, and high compression so that settlement on peat soil is very large. It makes peat soil categorized as bad soil for construction. The purposes of this research were to know the index properties of peat soil, to determine the classification of peat soil, and to analysed the compression index (Cc
) and coefficient of consolidation (Cv
) by consolidation test with gradually loading from 0.5 kg, 1 kg, 2 kg, 4 kg, and 8 kg and immediately loading of 1 kg and 4 kg for 7 days. Peat soil Paya Pinang Plantation had 732.0 % water content (w), specific gravity (Gs
) of 1.533, void ratio (e) of 8.235, moist unit weight (γb
) of 1.008 gr/cm3, dry unit weight (γd
) of 0.166 gr/cm3. Based on ASTM D4427-92 (2002) peat soil sample had 22.424 % ash content, which classified as high ash peat and as slightly acidic peat with a pH greater than 5.5 and less than 7. The compression index (Cc
) was 0.693 and coefficient of consolidation (Cv
) was 0.275cm2/sec.
Classification and consolidation test on peat soil of Asahan Regency Sumatera Utara Province
Authors: Roesyanto  , Shakila F 
Published: June 2020

Abstract
Defined as land with water-saturated soil, formed from deposits that originate from the accumulation of decaying past plant. Peat soil has poor physical properties for construction purposes, the soil has low shear strength and has a high shrinkage because of a lack of mineral content in it. The research purposes were to find out the index properties and the classification of peat soil and to analyze the compression index (Cc) and the coefficient of consolidation (Cv) of peat soil. The research was carried out by gradual consolidation and immediately consolidation. In gradual consolidation the load was given in step by step of 0.5 Kg, 1 Kg, 2 Kg, 4 Kg, 8 Kg, and immediately consolidation using a load of 1 Kg and 4 Kg for 7 days. Peat soil of Pertahanan Village had high water content (w) of 726.34 %, specific gravity (Gs) of 1.302, moist unit weight (γb) of 0.764 gr/cm3, dry unit weight (γd) of 0.144 gr/cm3, void ratio (e) of 8.06. Based on ASTM D442-84 (1989), the peat soil had 45.032 % ash peat and 54.968 % organic content, and it was classified as High Ash Peat. The acidity of peat soil was 4 and it was classified as Highly Acidic Peat with a pH less than 4.5. Index compression (Cc) of the peat soil was 0.659 and the coefficient of consolidation (Cv) was 0.317 cm2/seconds.
A study of calcium hydroxide as a stabilizing agent in clay soil toward California bearing ratio and unconfined compression value
Authors: Roesyanto  , Iskandar Rudi , Puji Hastuty Ika , Arrasyid R. 
Published: June 2020

Abstract
Soil is one of the most important materials in construction. Soil stabilization is an attempt to increase condition of soil that have poor engineering properties. Soil stabilization is also a mixture of soil with certain stabilizing agents to increase the engineering properties of the soil to attain technical requirements. This research used calcium hydroxide as a stabilizing material. The study purposes were to improve the engineering properties of clay due to the addition of 3% - 30% calcium hydroxide, Ca(OH)2. The clay soil was classified as A-7-6 (9) based on the AASHTO classification system and was classified as CL (Clay – Low Plasticity) based on USCS. The unsoaked California Bearing Ratio (CBR)of original soil was 6.29%. Meanwhile, the Unconfined Compression Test (UCT) of original soil was 1.42 kg/cm2. The study showed that the addition of calcium hydroxide increased the engineering properties of clay soil. The unsoaked CBR reached the maximum value of 11.46% at a variation of 12% calcium carbonate. The UCT also gained the maximum value of 3.12kg/cm2 at a variation of 12% calcium hydroxide.
Reading the meaning of shophouses facade in Dr Mansur street corridor at Medan City
Authors: Lindarto D , Eddy F , Harisdani DD 
Published: June 2020

Abstract
The creation of shop house facade design appears as an effort to describe the function of space utilization. Shophouses facade is architecturally the only field that allows design creation in architectural art. This facade provides also provides an opportunity to communicate the meaning, content and function of shophouses through signs. This research aims to read the signs on the shophouses facade on the Dr. Mansur corridor and revealed the effectiveness of using these signs as a means of commercial advertising. With the method of Robert Venturi’s version of semiotic interpretation and validation with the Charles Saunders Peirce version of the triadic concept of sign interpretation model, the interpretation results that there are four styles of shophouses with indexical, symbolic, iconic and exhibitionist characteristics. The results of the study show that the dominant commercial appeal is achieved with exhibitionist character and event / celebration as commercial meanings. This research is useful to give a deep meaning to the phenomenon of changes that occur in FASAD buildings that affect the creation of the face characters of cities that form urban vernacular architecture.
Optimization of garbage transport routes in West Medan using Clarke & Weigh saving and Floyd Warshall algorithm
Authors: Syahputri K , Sari RM , Rizkya I , Leviza J , Tambunan M M , Hidayati N 
Published: June 2020

Abstract
Problems of Medan City is the city with the third highest population density in Indonesia. This results in a large quantity of waste generation in the Medan city that must be managed. Limitations of waste transport equipment resulting in the accumulation of waste in various polling stations in the city of Medan so that it needs to be carried out distribution route optimization. Optimization is done by Clarke & Weight Saving and Floyd Warshall Algorithm. Saving matrix method is one method used to schedule the quantity of vehicles taking into account the maximum quantity of vehicles. The Floyd–Warshall algorithm is a simple and widely used algorithm to compute shortest paths between all pairs of vertices in an edge weighted directed graph. It can also be used to detect the presence of negative cycles. Routes generated using the Saving Matrix method successfully save of travel distance of 33.65 km, and using Floyd Warshall successfully save the travel distance of 25.89 km.
Clustering the vulnerability of traffic accidents in Medan city with fuzzy c-means algorithm
Authors: Syahputri K , Sari R M , Rizkya I , Tarigan U , Siregar I , Farhan T A 
Published: June 2020

Abstract
A traffic accident is one of the global problems that needs serious handling. Traffic accidents happens in various places at different times, this thing causes the difficulty to determine which area has traffic accidents-prone. Information about traffic accidents-prone areas is very needed for the people and regulators. That information can be a consideration for supervision or anticipation, especially for the police. Medan is the capital city of Sumatera Utara province, Indonesia. Medan is the third-largest city di Indonesia after Jakarta and Surabaya also the largest outside Java Island. Medan is one of the cities in Indonesia that has traffic accidents problems. 25,08% of all the traffic accidents in Sumatera Utara province in 2016 happened in Medan. 2018’s traffic accidents data acquired from the traffic unit in Medan Police Office shows a total of 947 traffic accidents that causes 148 died, 456 peoples heavily injured, and 616 people lightly injured. Then, this data is grouped based on the road they happened on and then the grouped data is clustered with the Fuzzy C-Means Algorithm based on the severity of the accidents, resulting in 5 roads being very vulnerable, 14 roads being quite vulnerable, and 224 roads being safe.
Study of anaerobic biofilter tofu wastewater treatment with bioball media and phytoremediation by kiambang (salviniamolesta)
Authors: Herlina Netti , Khairani Annisa , shiddiq Safrina 
Published: June 2020

Abstract
Small and medium industries such as tofu industry are characterized as industries with high levels of pollution because it lacks or does not have a wastewater handling system. Tofu wastewater contains high level of chemical oxygen demand (COD) and total suspended solid (TSS). If referring to the standard quality of wastewater, tofu wastewater requires treatment before being discharged into water bodies. This research aims to find out the effect of residence time and plant mass variation on the efficiency of reducing COD and TSS in tofu wastewater. This research were used anaerobic reactors with bioball media and phytoremediation reactors using kiambang (salviniamolesta) with plant mass variations of 50, 100, 150, 200 and 250 grams. The research begins with the process of seeding to breed microorganisms derived from tofu wastewater then proceed with running on the anaerobic reactor until the reduction in COD reaches 60% -70%. On the 6th day of running, the reduction in COD has reached 66.66% so that it can be continued flowing tofu wastewater to the phytoremediation reactor. The process of running on phytoremediation is done with variations in plant mass and residence time of 0, 1, 2, 3, 4, 5, 6, and 7 days. The results showed that the variation of residence time affected the level of COD and TSS reduction. In phytoremediation reactors, the best plant mass in reducing COD levels is 250 grams with removal efficiency at D-7 reaching 59.61% while the best plant mass in reducing TSS levels is 50 grams with removal efficiency at D-7 reaching 89.41 %.
Comparison of solar water heater performance with u curved pipes and straight pipes design using CFD
Authors: Perangin-angin Siwan E. , Ambarita Himsar 
Published: June 2020

Abstract
Solar energy has a very important role from time to time. In this era, the development of technology that uses the sun as a primary source is growing rapidly. One application of solar energy in solar water heaters. Solar Water Heater is a device that uses energy from the sun’s heat to heat the fluid air flowing in the Pipe so that the temperature of the fluid that comes out of the Pipe is higher. Pipes are one of the most important parts of solar water heaters. Pipes as a medium for fluid flow and heat transfer from the collector domain to air fluid. Pipe design is an important factor in the design of solar collectors. In this research, we will discuss the performance of 2 types of pipes. The first straight pipe type and the second pipe type U Curved Pipes. With CFD simulation methods and variations in fluid flow velocity, the results of changes in fluid temperature of the fluid coming out differ from the 2 types of pipes. The increase in temperature seen in liquid air in the pipe faces 0.9425% compared to straight pipes.
The analysis of occurring process to the deformation and the bending plats from the right hand of the hull plates of LCT Malela Raja III ship for economical management
Authors: Tuny SM 
Published: June 2020

Abstract
The introduction of the research, this is a ship carrying liquid cargoes for the trayek Namlea and arround Buru Island. Gross tonnage (GT) are 86 tonnes and the weight displacement area 173,522 tonnes. The Engine of Mitsubishi merk, type 6D15 with Engine Power 2x90 HP and the Engine Rotation are 2x1500 RPM (4 stroke of the engine), with reduction ratio 1;4. The trayek around Buru Island (In Moluccas) in the rain condition the climate condition is necessary to change ie in the rain season, the sea condition causes waves and pressures the hull plate with wave flow. In addition with the spreading vibration from the Main Engine of this ship wil occur the curvature and the deformation. The purpose of this research; 1. To know how many thick of the strength right hull plates. 2.To know the influence of the vibration spread of the main engine and the ship Hull plate that to analyses the frequencies of the main engine vibratory and the ship Hull vibration. The result that we can find in this research with natural frequency analysis is N2nv
= 453,48 cpm, while N3nv
= 919,62 cpm dan N4nv
= 1390,66 cpm, the ship operate 75% from 2 engine is 2250 cpm, while the ship operates with a machine speed of 75% for 2 pieces of machinery = 2250 cpm and 60% = 1284.84.
Pro-environmental behavior for small medium enterprise: a review
Authors: Elba Ridha Arrazy , Matondang Nazaruddin , Haikal Sitepu Muhammad 
Published: June 2020

Abstract
The problem that is often faced by environment of Small and Medium Enterprises is the lack of, and also the growth of small and medium enterprises that are increasing every year makes handling waste uncontrollable, the impartiality of small and medium enterprises in the environment causes waste pollution and energy use out of control. Some literature, it is explained that the application of pro-environment behavior can help to reduce the impact of environmental pollution, and also maintain environmental sustainability. The application of pro-environment behavior becomes an alternative in maintaining environmental sustainability or call often called Sustainable development. The purpose of this study is to review journals or the results of research on applied environmental behavior within the scope of small and medium enterprises, so that they can find out the results of pro-environment implementation that applied to various literature and research. The application of pro-environment behavior is strongly recommended so that it becomes a reference program for the community and also becomes a reference material for making regulations for BLH (environmental agency) to improve environmental preservation, especially in Indonesia, especially in the city of Medan, North Sumatra Province and also as a problem solving for growth uncontrolled waste.
Planting media with material composition variation of Sinabung sand using mechanic press toll
Authors: Haryanto Bode , Arifin Muhammad , Bukit Rina , Tarigan Ahmad Perwira M , Suranta Surbakti Eddy 
Published: June 2020

Abstract
The inspiration of this investigation was to descript the output analysis of product plantation media from sand material from mount Sinabung eruption. The Sinabung volcanic sand with chicken manure and natural soil were mixed and used as materials to produce planting media. The experiment started from collecting the materials with pre-treatment then added by certain variation material prepared to make shape by mechanic pressure tool to construct the matrix media with cylindrical shape.The surface characteristic and hardness of the planting media products were analyzed to get the best variation of materials. The increasing percentage of Sinabung sand will decrease the strength of mixed materials plantation media from 61,9 N to 40,9 N and to 32,6 N for 20%,40% and 60% Sinabung volcanic sand. The product planting media can be used in the area that needed reforesting such as: around the mount Sinabung, toba lake, ect.
Alternative study of reducing Carbon Dioxide (CO2) from the transportation sector in Medan city
Authors: Suryati I , Manik BDL , Syavira F , Karina GN , Herlina N , Hasibuan NH , Siregar RL 
Published: June 2020

Abstract
Increase of amount greenhouse gas (GHG) emissions from human activities in the form of an increase the number of vehicles indirectly impacting climate change. The purpose of this study is to calculate GHG emissions, namely carbon dioxide (CO2) generated from the transportation sector and determine the scenario of reducing CO2 emissions from the sector transportation in Medan City. The method of calculating GHG emissions in this study uses TIER II from IPCC. The study was conducted in 12 locations of sampling points with a traffic counting time of 12 hours per each point with variations in the time of workdays and weekdays. The results showed that CO2 emissions generated at the twelve sampling locations amounted to 484.41 - 561.16 tons CO2 / year. The scenario of reducing CO2 emissions in this study is the application of Bus Rapid Transit (BRT), parking management systems and fuel substitution. Comparison of the average of the three scenarios in reducing CO2 namely; the application of BRT ± 24.28% with the number of BRT units needed per road segment ranging from 11 - 57 units; fuel substitution of ± 9.16% and parking management system ± 12.08%.
Analysis of noise level and dust concentration in the disintegration work station
Authors: Buchari  , Fadhilah Nahdah , Hidayati Juliza , Anizar  , Sari Rahmi M 
Published: June 2020

Abstract
The disintegration work station of UKM that operates in the field of processing coconut fiber into coco fiber press, coco peat, orchid growing media, and noisy and dusty foot mats. The purpose of this study was to determine the level of noise and dust concentration at the disintegration work station of coconut coir SMEs and provide recommendations for improvement. Research on noise levels was carried out using environmental meters four in one. Research on dust concentration was carried out using a highvolume air sampler. The research method used in the measurement of dust concentration using the gravimetric method. The noise level at the disintegration work station is 109.6 dB at measurement point 1; 107.1 dB at measurement point 2; and 108.5 dB at measurement point 3 has exceeded the noise limit set by the Regulation of the Minister of Manpower and Transmigration of the Republic of Indonesia Number PER.13/MEN/X/2011 for 8 working hours, which is 85 dB. Noise mapping using surfer 15 software shows that the noise level of the disintegration work station exceeds the threshold value of 3 measurement points. The actual noise exposure time of the worker exceeds the standard exposure time. The actual daily noise dose value exceeds the standard daily noise dose. The level of dust concentration at the disintegration work station is included in the hazardous category based on the Decree of the Head of the Environmental Impact Management Agency No. 107 of 1997.
Development of natural fiber tensile test apparatus using cantilever structure loading system
Authors: Abubakar  , Homma H , Ambarita H 
Published: June 2020

Abstract
Measurement of the mechanical properties of natural fiber is an important role in quality control. One of the most important mechanical properties of fiber is its tensile strength. To carry out tensile test fiber required tensile test apparatus. The tensile test apparatus used today is a foreign-made commercial tensile test imported at an exorbitant price. These conditions cause obstacles in the development of basic natural fiber technology in Indonesia. The purpose of this research is to design a natural fiber tensile test apparatus which is cheap and easy to operate. The result of this research is prototype of fiber tensile test which has been successfully tested with: 5N loading capacity, calibration curve accuracy: N = 1.052 V and loading rate 0.014 N/s. The result of tensile test to one natural fiber that used abaca fiber in range 100 MPa - 900 MPa and the data of tensile test results in existing literatures then there is conformity with the value of tensile strength. The results of this study are expected provide benefits for researchers, academics and industry in supporting the development of Indonesia natural fiber industry as well as enhancing competitiveness at international level.
The silica-filled polychloroprene rubber in the addition of alkanolamide: tensile and vulcanization properties
Authors: Surya I , Ginting M 
Published: June 2020

Abstract
Alkanolamide as a type of fatty alcohols was compounded to improve the tensile and vulcanization properties of silica filled polychloroprene rubber (CR) using a system of semi efficient vulcanization. The CR was filled by silica filler with a certain concentration at thirty phr and the alkanolamide was compounded within silica-reinforced CR at varied amounts i.e. 0.0, 1.0, 3.0, 5.0 and 7.0 phr. The results showed that alkanolamide increased the times to optimum cure, maximum and minimum torques and torque change. It also reduced the tensile moduli but increased the breaking elongations. The tensile strength was increased up to a three phr of alkanolamide incorporation and, the three phr of alkanolamide was an optimum concentration where silica filled CR vulcanizate with three phr of alkanolamide concentration had tensile strength with the highest value.
The properties of unfilled natural rubber in the existence of alkanolamide: swelling, mechanical and morphological properties
Authors: Surya I , Philbert  
Published: June 2020

Abstract
A study was carried out on the utilization of alkanolamide as a new curative additive in natural rubber (NR) compounds by using a semi-efficient vulcanization system. The alkanolamide was derived from the waste of cooking oil and incorporated into the unfilled-NR compound at 0.2, 0.4, 0.6, 0.8, and 1.0 phr. The effect of alkanolamide on swelling percentage, mechanical and morphological properties of the NR compounds were observed. It was found that the addition of the alkanolamide increased elongation at break of the NR compounds. The alkanolamide also increased tensile modulus, tensile strength, hardness and crosslink density of up to 0.6 phr of alkanolamide loading and then decreased with further increases in the alkanolamide loading. Scanning electron microscopy (SEM) micrographs proved that 0.6 phr loading of alkanolamide in the NR compounds exhibited the greatest matrix tearing line and surface roughness which correlated to a higher tensile strength of the NR compounds.
Quality control analysis to reduce defect product and increase production speed using lean six sigma method
Authors: Siregar Khawarita , Elvira  
Published: June 2020

Abstract
CV. Naga Mas engaged in manufacturing spare part. Support assy is one of the products that manufactured by the company. The product has an average disability percentage 9.49% of the total monthly production which exceeds the limits of the company. This study propose to increase production speed by to eliminate non value added activities and reduce the amount of disability products through design improvements. This problem solved with Lean Six Sigma approach with the combination Lean and Six Sigma concepts by using DMAIC steps to propose improvements through eliminate non value added activities and reduce the amount of defective products. Proposed improvements given that eliminate non value added activities and micro layout redesign settings. Based on estimates, the result for the process lead time reduction is 22.01 min / cycle process, increasing process efficiency and process cycle velocity, respectively for 7.80% and 0.0008 processes / h. Improvement plans are using 5S method such as sorting, arrangement, cleaning, consistency and self discipline that makes work programs in making machines, makes work procedures, inspects raw material, improves communication with suppliers and manages regular machine maintenance.