bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the governance of parent-subsidiary company under the mixed ownership mode
Authors: Zhu Ye , Jiang Wei , Shi Xinyu , Dai Yuntian 
Published: June 2020

Abstract
As the core content of state-owned enterprises reform, Chinese state-owned enterprises have some problems in corporate governance for a long time, which restricts the process of the reform and development in these enterprises. As a breakthrough in deepening the reform of state-owned enterprises, the mixed-ownership reform has opened up a new theoretical research direction and reform practice space for state-owned enterprises to carry out and improve corporate governance. Under the framework of corporate governance and contemporary property rights theory and based on the analysis of the characteristics and existing problems of corporate governance in Chinese state-owned enterprise groups, this paper summarizes the framework and specific measures that can be taken by state-owned enterprises to improve corporate governance under mixed-ownership reform.
An accurate and fast detection method for railway lightning protection component
Authors: Wu Suining , Li Bin , Wang Zhixin , Chen Xiaoguang , Shi Long , Tan Shulin 
Published: June 2020

Abstract
Lightning protection component is used to display the working condition of railway cable networks. Lightning strike damage cable networks, hence, the research of detection method for railway lightning protection is of great importance. So far, there are limited methods to solve this problem. Existing methods are based on electrical and magnetic signals. However, these method can not meet the acquirement of speed and accuracy. In this paper, we proposed a accurate and fast detection method for railway lightning protection component. The proposed method is based on deep neural network named W-YOLO. To solve the imbalanced samples problem of fault components and common components, we devised a novel classification loss function according to the proportion components. Since the raw class and location coordinate of components are lack of meaning, a sorting method of elements based on the angel and distance threshold is proposed. From the experiments, the proposed detection method is able to detect railway lightning protection component accurately in real time.
Urban square as a strip development revitalization element (case study: Dr Mansur street corridor, Medan City)
Authors: Lindarto D , Harisdani DD 
Published: June 2020

Abstract
Indication of urban sprawl at the center of urban growth are characterized by strip development of residential-commercial zoning changes uncontrollably. One of the strip developments that took place in the city of Medan was Dr. Mansur street corridor. Changes in residential allocation functions become uncontrolled commercial places because of the dynamics of community activities and become a development degradation that requires efforts to revitalize the area. By uncovering the potential of urban square forming with direct observation in the field of social activities that take place in shared public spaces in this corridor, research raises the local wisdom of community behavior and potential places of interest that are bottom up development. The finding this research is the identification mapping of revitalization elements in the form of urban square (place and activity) for the complimentary of generic and organic revitalization models, which can later become a guide for the community and government in addressing changes from and by the community so that the negative strip development indication can be controlled.
Soil Improvement for clay with limestone and glass slag based on CBR value
Authors: Puji Hastuty Ika , Roesyanto  , Ridwan Anas M , Nasution Adi 
Published: June 2020

Abstract
Trash is one of the biggest problems for the cities in Indonesia, especially the city that has a relatively big number of citizens. One of them is glass, where glass is a material that is not decomposed by soil biologically. The negative impact from glass waste is it harms the environment. The objective of this research is to determine whether glass can be useful as the material for clay stabilization and to determine the bearing capacity using limestone and glass slag and also to determine bearing capacity using only the limestone. The mixture used in this research is 2% limestone and 4% limestone with additional glass slag of 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% and 10%. Based on the research, it is determined that the biggest CBR value at a mixture of 2% limestone and 10% glass slag is 8.86%, and at variation of mixture of 4% limestone and 10% glass slag with CBR of 10.5%.
The use of bottom ash and limestone as soil stabilization material based on unconfined compression test
Authors: Puji Hastuty Ika , Roesyanto  , Stephanes Daniel 
Published: June 2020

Abstract
Unconfined Compression Test (UCT) is a test for cohesive soil strength, and this could be tested for both existing soil and remolded. UCT is aimed to determining the soil strength rapidly and quickly and economycally. Soil improvement is done by mixing the soil with other material to have a better soil characteristics. This research uses chemical stabilizers, i.e, limestone and bottom ash. This research is meant to determine the value of maximum compression strength using UCT with additional stabilizing materials and to determine the optimum water content of additional limestone and bottom ash. Based on the result, it is known that the existing soil has water content 24.35%, unit weight 2.673, liquid limit (LL) 38.15%, and plasticity index (PI) 21.54%. Based on AASHTO, that soil is categorized as Clay Low (CL), where as based on USCS it is categorized as A-6. Value of UCT of existing soil is 1.320 kg/cm2. After the soil is mixed with variation of limestone and bottom ash determined, it is obtained that the most optimum UCT value is at variation of 4% limestone + 8% bottom ash with value 2.585 kg/cm2, optimum water content (Wopt) 21.80 % and dry weight maximum (γd max) 1.427 gr/cm3.
Evaluation of loading rate to the stress-strain response of reinforcing steel bar
Authors: Idhar R A , Sjah J , Handika N , Tjahjono E 
Published: June 2020

Abstract
To obtain the material properties of reinforcing steel bar (rebar), a tensile test must be performed in the laboratory. Some standards, such as SNI and ASTM, standardize the condition of the sample and the loading rate of the tensile test. ASTM E8M regulates the loading application (1.15-11.5 MPa/s) of steel rebar test under tension to determine yield properties and SNI 07-2529-1991 governs 10 MPa/s as the maximum loading rate. These circumstances affect the duration of tensile test in real condition, which may lead to one hour of tensile test. In this article, the effect of loading rate of pre-conditioned steel bars (by reducing the section, grinding, and/or lathe according to SNI 07-2529-1991) is investigated using deformed bars (BJTS 40, certified by industries). Random samples of steel reinforcement bar are tested under three different loading rate applications. The result of the material properties of rebar, such as stress-strain curve, yield strength, and ultimate strength, are discussed and analyzed in this study. Different speed tests resulting in different stress rates before yield. However, the stress-strain responses of specimens in the range of linear elastic material are similar. Moreover, at the post-yield/plastic region, the loading rate significantly affected the ductility of the material.
Review CBR (California Bearing Ratio) value on peat soil Paya Pinang plantation of sub-district Laut Tador Batubara Regency
Authors: Roesyanto  , Taminta B 
Published: June 2020

Abstract
Peat soil is a type of soil that highly consists of organic substance, which is formed from the remains of fully decomposed plants. Peat soil has high water content, high void ratio, and low bearing capacity so that the peat soil is categorized as bad soil for construction. The purposes of this research were to identify the index properties of peat soil, to determine the classification of peat soil, and to determine the subgrade strength of the peat soil from the CBR test. Peat soil Paya Pinang Plantation had high water content (w) of 581.721%, specific gravity (Gs
) of 1.533, void ratio (e) of 2.103, moist unit weight (γd) of 0.549 gr/cm3, dry unit weight (γb) of 0.088 gr/cm3. Based on ASTM D4427-92 the peat soil sample had 22.424 % ash content and organic content of 77.576 %, as a result, the peat soil was classified as High Ash Peat. The peat soil had a pH of 6 and was classified Slightly Acidic because of the pH value between 5.5 and 7. The CBR soaked and unsoaked for three days were 1.222% and 1.505% respectively. Based on the Standard Proctor test, the maximum dry density was 0.474 gr/cm³ and the optimum water content was 37.236%.
Operational performance analysis of trans mebidang bus (case study: Binjai terminal - Medan)
Authors: Surbakti M S , Bakara M R 
Published: June 2020

Abstract
The purpose of this study is to analyze the performance of parameters and the satisfaction of passengers of Trans Mebidang bus which serves from the Binjai terminal to Medan City Market Center. Based on SK.687/AJ.206/DRJD/2002, the performance of parameters is comprised of: the travel time, the headway, the circulation time, the load factor, and the comfort of the passenger area on the bus. The method that is used to measure the satisfaction of the passengers is Importance Performance Analysis. Results of the analysis found that the parameters of headway, circulation time, and load factor should be corrected because do not meet the standard, whereas the results of the analysis of the satisfaction of passengers indicated that the parameters that need to get improvement are the physical condition of the bus stop also the comfort and the safety of the bus stop.
Heritage conservation roadmap for the historic city of Medan, Indonesia
Authors: Fitri Isnen , Ratna  , Marisa Amy , Sitorus Rudolf 
Published: June 2020

Abstract
Due to the absence of guidelines or plans, conservation and protection activities were done accidentally as a reaction to the situation. Therefore, this study aims to explore and establish a roadmap for the conservation and protection of cultural heritage in Medan through a compilation of secondary data on aspects of documentation, heritage legislation and community involvement and then followed by group discussions meeting with several Medan cultural heritage experts and staffs of the Cultural Office. Through data compilation and analysis, it was found that there were three missions from 6 missions of the city that had been determined by the current Medan Municipal Government. It was the guideline in making a scenario for the development of a roadmap for the heritage conservation in Medan which was dominated by the immovable heritage, especially buildings. Therefore this roadmap of heritage conservation of is intended to be a guideline in the effort to safeguard cultural heritage in Medan, particularly for the tangible heritage, however, in its implementation, it is inseparable from the intangible heritage. This roadmap covers five aspects, namely strengthening the capacity building of Institution and HR Management Systems, developing the cultural facilities, enhancing regulations and policies on culture heritage, provision of heritage conservation plans and guidelines, and public education improvement, socialization and promotion.
Creation the space for communal learning place in the area between buildings
Authors: Siagian Morida , Sitorus Rudolf 
Published: June 2020

Abstract
One of the objectives of outdoor space planning and campus building is to accommodate students need for learning activities and social interactions. The Faculty of Mathematics and Natural Sciences one of the 15 faculties in the University of Sumatera Utara has a uniqueness in the use of gathering space on campus. By using mixed research methods, it found many students use almost their time in outdoor communal space. The students transform the outdoor space between building from relax space to be learning activities space. Because of limited outdoor spaces and many works have to be finished the students adapt the outdoor space for their needs with their own ways. Their activities and interaction create space that fit to them and characterize the area.
Performance spaces in Lumban Silintong area
Authors: Siagian M , Sitorus R 
Published: June 2020

Abstract
Lumban Silintong, Balige which is located in the bank of Lake Toba has changed very rapidly after the Central Government of Indonesia set Lake Toba as one of 10 major tourism destination in the country and established Badan Otorita Danau Toba (BODT) was in 2016. The beach which was a public space where all the community from the area and visitors from outside get access to the lake for free, and enchant beautiful lake view without limitation. Today it becomes a commercial space. The owners of money built currently 18 cafes along this beach. The area become space for private activities which characterized by modernity which are forming space gaining maximum profit. The 24-hour live cafes do not stop having eliminated the daily activities of local people and become commercial activities for the sake of café owners. District governments that are unable to enforce regulations on development along the beach cause the appearance the beach is not controlled. With mixed research methods, this study was done with observations, data collecting, photo taking that local space along the beach of Lumban Silintong which was used to be experienced and used by the public for free, now become commodities with modern concepts.
Application of the delphi method to new renewable energy assessments in power plants in North Sumatra province
Authors: Ishak Aulia , Habibi Rahman Barus Wan 
Published: June 2020

Abstrak
New renewable energy assessment on power plants is one of the solutions that can be developed in order to increase the utilization of new renewable energy as a source of electrical energy in electricity generation and also to realize national energy security. Before conducting a new renewable energy assessment on a power plant, the steps that must be taken are determining the criteria and subcriteria. Determination of criteria and criteria for new renewable energy assessment at the power plant is carried out using the Delphi method. The Delphi method is a systematic and interactive method, which depends on a panel of independent experts. Delphi is based on the principle that estimates from expert structured groups are more accurate than those from unstructured or individual groups. In this study the Delphi questionnaire was distributed. Where the contents of the questionnaire are to determine the criteria and subcriteria in new renewable energy assessment at the power plant. The questionnaire was distributed to 3 respondents who were considered experts in their fields, namely new renewable energy at the power plant. The results of the distribution of the questionnaire are the criteria for evaluating new renewable energy used in the study consisting of 4 criteria namely technological aspects, economic aspects, environmental aspects, and social and political aspects developed into 16 subcriteria namely energy efficiency, security risk, energy production capacity, investment costs, operating and maintenance costs, financial risk, payback period, methane gas emissions. CO2 emissions, CO emissions, land use, ecosystem impacts, labor, political support / policy, human health impacts, social benefits.
Comparison of mass balance and oil quality in plant refinery I and IV
Authors: Irvan  , Trisakti B , Sidabutar R , Situmeang CW , Siregar FMR 
Published: June 2020

Abstract
Refinery process is the process of refining crude palm oil (CPO) to remove Free Fatty Acid (FFA), odors, and reducing color, so that it meets the quality requirements. Fractionation is a process of separating triglycerides based on palm oil based on its melting point which aims to separate the solid fraction (stearin) and liquid fraction (olein). The fractionated oil comes from the refining process. The purpose of the mass balance comparison is to determine the quality and quantity of oil produced from the refinery and fractionation processes. The production capacity at the refinery plant I and IV were 1,700 and 1,800 respectively. The amount of refined bleached and deodorized palm oil (RBDPO) produced based on the mass balance calculation at plant I and IV were 73,597 and 77,377 kg/h respectively with criteria were free of impurities and FFA.
Potential of durian, avocado and jackfruit seed as raw material of bioethanol: a review
Authors: Ginting M H S , Irvan  , Misran E , Maulina S 
Published: June 2020

Abstract
The using of fuel oil is very consumptive so that it increases every year, as decreasing the availability of non-renewable natural resources, therefore the use of alternative energy (renewable energy). Renewable energy is a natural source of energy produced that will not be exhausted and can be sustainable if managed properly, among another biofuel. The purpose of this article to review the potential of tropical fruit seeds: durian, avocado, and jackfruit as raw materials for bioethanol production include stages: starch extraction, hydrolysis process using acid as catalyst, and fermentation. From available research data, the potential of tropical fruit seeds needs to be developed as raw material for making bioethanol.
The utilization of chicken bones as heterogeneous catalyst (CaO) in the production of fatty acid ethyl ester from crude palm oil by using ethanol as solvent
Authors: Suriani Sinaga Mersi , Pardede Pontius , Ermawati  
Published: June 2020

Abstract
Fatty acid ethyl ester is one of the most potential alternative energy because it is renewable and environmentally friendly. Fatty acid ethyl ester is usually made by transesterification using heterogeneous alkali catalyst. Chicken bones ash (CaO) is heterogeneous alkali catalyst which is non-corrosive and environmentally friendly. It can also be separated easily from the product by filtration and less removal problem than homogeneous catalyst. This catalyst was made by grinding and calcination the chicken bones. Others variables used in this research were the dosage of the catalyst, molar ratio of ethanol to crude palm oil and reaction temperature. The best yield of the fatty acid ethyl ester was 90.052% at the condition of 17:1 ethanol to crude palm oil molar ratio, 70 °C reaction temperature, 7% of catalyst (w/w), 7 hours of reaction time and 500 rpm stirring speed.
Biogasoline production via catalytic cracking process using zeolite and zeolite catalyst modified with metals: a review
Authors: Haryani Nina , Harahap H. , Taslim  , Irvan  
Published: June 2020

Abstract
Biogasoline as an alternative fuel from vegetable oil is increasingly being studied by universities, research institutions, governments and others. The fact that the low yield of biogasoline is produced, the length of reaction time, how much energy is needed during the reaction, the high reaction temperature and expensive operating costs is a challenge in the scientific world to improve and develop further research. An appropriate process technology is needed in order to produce biogasoline fuel which is equivalent to the results of petroleum fractionation. Catalytic cracking process is one of the processes that are widely studied to produce biogasoline. Along with the development of biogasoline production, the use of catalysts in the cracking process has become increasingly diverse. It is in this paper that various biogasoline production with cracking processes using catalysts focused on zeolite and zeolite catalysts modified with metals will be reviewed, including an overview of cracking raw materials, types and characteristics of zeolite catalysts, operating conditions, and how the performance of each catalyst. Zeolite catalyst which is a heterogeneous catalyst is considered to have a good ability in selectivity, activity, and ease of modification so it is very influential on cracking results. Some zeolite catalysts modified with metals such as Zn/Zeolite, Au/HZSM-5, Ni-Mo/zeolite, Pd/HZSM-5, Pt/HZSM-5 are reported to be able to provide good performance to increase biogasoline yield and certainly become a useful new catalyst in the scientific world.
Hydrolysis of oil palm empty fruit bunch using rotating microwave reactor
Authors: Sarah M , Fajrina A 
Published: June 2020

AbstractThis study using microwave application as a heat source to facilitate the conversion of oil palm empty fruit bunch (OPEFB) into glucose by hydrolysis process. The hydrolysis process using sulfuric acid (H2SO4) as a catalyst at a various concentration (0 and 0.25 N) and level of microwave power (100 and 300 W). The glucose concentration is measured by the DNS method using UV-VIS spectrophotometric. The best glucose concentration is 23.038 ppm at 60 minutes, 0.25 N H2SO4, and the level of microwave power is 300 W.
Improving the quality of liquid smoke from oil palm fronds through adsorption and distillation processes
Authors: Maulina S , Sinaga F A 
Published: June 2020

Abstract
This research aims to obtain information regarding purification of liquid smoke from the pyrolysis of oil palm fronds to be used as a preservative product following food quality standards. This research started by performing the pyrolysis of oil palm fronds at 250 °C for 2 hours to produce liquid smoke. Subsequently, the liquid smoke from the pyrolysis was purified in two stages, namely adsorption and distillation. The adsorption which was carried out at 60 °C for 1 hour by using an activated zeolite, resulted in liquid smoke which still contains a tar contaminant compound. The analysis of the liquid smoke after adsorption showed a decrease in the composition of carbonyl and phenol compounds but in trace amounts. Meanwhile, the distillation was carried out at 125, 150, 175, and 200 °C and at 15,30,45, and 60 minutes, which resulted in a liquid smoke that is free of tar. The research revealed that the recommended temperature and time of distillation was at 150 °C and 45 minutes with tar residue of 2.4 %, total acid of 5.15 % and a pH of 2.3. Furthermore, GC-MS analysis indicated that the resulting liquid smoke was dominated by acetic acid compounds of 45.46 % (w/w).
Waste power plant: waste to energy study in Medan city area
Authors: Sihite A , Kasim ST , Fahmi F 
Published: June 2020

Abstract
This study discusses the waste to energy processing technology in the area city of Medan Sunggal. Waste management is considered to be the optimal solution to reduce the volume of waste and its growth in Medan. Through the calculation and assessment of the data obtained, we can find out the volume of waste in Medan Sunggal is more than 132 m3 per day with a weight of 28,512 tons per day. The proposed waste to energy utilization method is the thermochemical method. Garbage is processed first in specific way as to reduce the water content in order to obtain a higher calorific value. The garbage has the potential to generate electricity at 1.8 MW theoretically, but the effect of 80% boiler efficiency, 25% steam turbine and 90% generator will affect the actual output to be around 451.46 kW. With the selling price of electricity in accordance with Ministry of Energy and Mineral Resources regulation number 44 of 2015, the implementation of Waste Power Plants (WPP) meets the feasibility of economic analysis. Based on the calculation of the economic analysis, the net present value of WPP obtained at Rp 970,964,221.25 and payback period does not exceed the economic life of the plant and benefit cost ratio is greater than Zero. These criteria can be used as a reference for evaluating the feasibility of developing Waste Power Plants in the area.