bluuebunny/crossref_metadata_2025_split huggingface dataset:
Phytochemical screening, antioxidant activity and thin-layer chromatography test of methanol extract and simplicia leaves of loquat (Eriobotrya japonica Lindl)
Authors: Hasibuan F.E , Syahfitri W , Ilyas S , Hutahaean S 
Published: January 2020

Abstract
Loquat (Eriobotrya japonica Lindl) is a medicinal plant that can be found in the Highlands in the region of Indnesia. Loquat has been widely used as a traditional medicine material by ethnic Chinese since ancient times. The research aims to analyse the phytochemical content and antioxidant activity of methanol extracts and simplisia loquat leaves. Phytochemical screening results show that methanol extract contains a secondary metabolite of alkaloids, flavonoids and steroid/terpenoid, while the Leaves Simplisia E.japonica contains a compound of secondary metabolites of alkaloids and flavonoids. Methanol extracts and Simplisia of E.japonica leaves were tested using DPPH with a high concentration of 20, 40, 60 and 80 ppm, incubated for 15 minutes and then measured by a spectrophotometer at a wavelength of 516 nm. Methanol leaves E.japonica extract has a value of IC50 39.4 ppm very strong category, while the Leaves Simplisia E.japonica has a value of IC50 102.4 ppm of medium category. The Rf value of methanol extract with a variation in solvent comparison (6:6, 7:3, 8:2, 9:1) is 0.78, 0.69, 0.51 and 0.40. The value of Simplisia leaves E.japonica with a variation in comparison of solvents (6:6, 7:3, 8:2, 9:1) are 0.80, 0.64, 0.49 and 0.18.
Optimization of fresh fruit bunches as crude palm oil production material
Authors: Siregar K , Syahputri K , Rizkya I 
Published: January 2020

Abstract
The increasing demand for Crude Palm Oil (CPO) makes palm oil production companies continue to improve production planning continuously in order to meet customer demand. Companies that are engaged in CPO production in the Medan city experience problems are not optimal due to companies are often faced with a situation in the form of a production mismatch with the volume of demand due to demand fluctuation. Therefore it is necessary to optimize the procurement of CPO by using linear programming methods. This method is used to maximize or minimize the resources owned by the company with several decision variables, objective functions and constraint functions. The results shows that the decision variables used are CPO cost, the cost of procurement using their own FFB, purchasing FFB cost and processing costs. The objective function is the maximization of company resources and constraint functions consisting of the maximum capacity of the factory, the availability of purchase FFB, the purchase quota of FFB, the availability of direct labor, processing transfers and processing costs.
Sustainability assessment in crude palm oil production: A review
Authors: Sitepu Muhammad Haikal , Matondang Abdul Rahim , Sembiring Meilita Tryana 
Published: January 2020

Abstract
Palm oil is important commodity for the world since it is a raw material for various important products such as cooking oils, cosmetics, and foods. Moreover, palm oil is found as a source for renewable energy such as biodiesel and biogas. As the result, the demand of palm oil is projected to jump in the future. To fulfil this demand, the increasing of palm oil production is unavoidable. Crude palm oil process is one substantial process to produce palm oil. This process becomes source of income for countries and citizen of those countries where crude palm oil are produced such as Indonesia, Malaysia and Thailand. Despite of these positive impacts, the environmental impacts of crude palm oil process such as greenhouse gas emission, waste, high water and energy consumption are identified. Thus, to maintain sustainability in palm oil production, several standards such as Indonesia Sustainable Palm Oil (ISPO) and Roundtable Sustainable Palm Oil (RSPO) are introduced. One main requirement from these standards is to monitor sustainability impacts of crude palm oil production. Sustainability assessment is a procedure to evaluate sustainability impacts of products, process and policies. This paper aims to review sustainability assessment process applied in crude palm oil production.
Screening ofi in vitro Cytotoxicities from methanol extract of Acehnese Murrayakoenigii Leaf
Authors: Amna U , Halimatussakdiah H , Wahyuningsih P , Saidi N , Nasution R 
Published: January 2020

Abstract

Murrayakoenigii (Linn.) Sprengis known as the miracle plant that are rich in medicinal properties. Aceh was used this plant as the local condiment that familiarize the specific food of Aceh. This research aims to screening the cytotoxic activities from methanol extract of M. Koenigii leaf from Aceh. The invitrocytotoxic activities were evaluated with using MTT assay method. Three cell lines were used as bioindicators including MCF-7, HeLa, and Raji. The result showed that the extract givesa very good activities against MCF-7 and HeLa cell lines with CD50 value of < 1 μg/ml and 2.25 μg/ml respectively, but the cytotoxicity against Raji cell lines showed as weak with CD50 value of > 1000 μg/ml. It can be concluded that the methanol extract of M. Koenigii leaf showed the potential activities against adherent cell type, but not potential to suspension cell type.
Sentinel-2 imagery utilization for small-plot agricultural studies
Authors: Novák V. , Křížová K. 
Published: January 2020

Abstract
In terms of mitigation the negative aspects of agriculture on the environment, various advancements were achieved during the past few decades. Precision agriculture and related remote sensing enable canopy properties to be monitored and evaluated timely and non-destructively. Although remote sensing is nowadays widely utilized in agricultural studies with significant results, there are still certain constraints. The spatial resolution of source imagery is one of them. This study deals with this issue by evaluating Sentinel-2 imagery and it’s utilization on a small-plot experiment. Four spectral indices were derived using open-source software SNAP and compared with leaf chlorophyll content data obtained during terrestrial measurements. Correlation analysis gave ambiguous results ranging from r = 0.64 (Green Chlorophyll Index) to r = -0.47 (Triangular Chlorophyll Index). Based on this observation it was concluded that this issue requires to be investigated more thoroughly to define the relation of pixel size and size of the surface unit.
Applying effective cloud computing maturity model (CCMM)
Authors: Gunawan Wang , Setyawan Edy 
Published: January 2020

Abstract
Cloud computing has evolved become important computing paradigm for all organizations around the world. Cloud computing emerges to address the limitations of organizational resources in deploying IT services. Due to its advantages, there are still many debates about how to apply cloud computing effectively. Many organisations have reported that embracing the cloud computing is not an easy task and surrounded with many complexities. The use of cloud computing depends heavily on the ability of the organization to adapt with cloud computing paradigm. In order to maximize the benefits of cloud application, each organisation needs to develop a systematic, broad, holistic, and pragmatic approach. Cloud computing maturity model (CCMM) is initated to provide easy tool for assessing current conditions and improve service capabilities related to cloud computing. Measurements the implementation of cloud computing however, is challenging task since it needs to address certain factors in both business and technical perspectives. The article applies the popular framework initiated by the Open Data Center Alliances (ODCA) cloud computing maturity model (CCMM) as essential reference to guide applying cloud environment.
Environmentally friendly technology development at era industrial revolution 4.0 in Indonesia
Authors: Anggusti Martono , Siallagan Haposan 
Published: January 2020

Abstract
Nearly 200 countries reached a historic agreement to tackle climate change in Paris December 2015. The Paris agreement binds countries to limit greenhouse gas emissions with the aim of limiting global temperature rise to 2 degrees Celsius relative to pre-industrial levels. The smoke crisis created in 2015 was the worst because El Nino made the rainy season delayed and caused many areas to experience drought. In fact, this year’s fog may even be the worst in history, with Indonesia itself reporting the death toll and half a million people suffering from respiratory diseases.
Nobody knows when doomsday will happen. But now, the world has begun the process of mass extinction, and humans can become one of the first victims of the mass extinction process. Experts agree to call it the sixth mass extinction. One researcher, Paul Ehrlich, a Stanford University biology professor said that in the 4.5 billion years of Earth’s life, there have been 5 mass extinctions that occurred, mass extinctions occurred 65 million years ago, which brought the extinction of dinosaurs. The fourth industrial revolution is a big leap for the industrial sector, where information and communication technology is fully utilized. Not only in the production process, but also throughout the industry value chain, giving birth to new business models with digital bases to achieve high efficiency and quality products. better.This writing will review the “Environmentally Friendly Technology Development at the Era Industrial Revolution 4.0 in Indonesia” which can minimize the current era of species extinction.
Data warehouse using Kimball approach in computer maniac
Authors: Salim Kelvin , Damayanti Lorita , Puspita Marisya , Liujaya Steven , Girsang Abba Suganda 
Published: January 2020

Abstract
It is difficult for small businesses to evolve without utilizing an adequate system which is able to manage information within the business entity efficiently. The reporting system commonly used utilizes query which consumes a large amount of time in order to generate results fulfilling requirements set by the user. In order to simplify and speed up reporting in digital world and eventually results in improvement of business, the business entity needs a system which can address problems quickly and easily. In this paper, data warehouse system which could simplify and speed up the reporting provisions that is needed by the business without having to modify the existing query being implemented. With Kimball approaches, the data to be reported could be customized in various forms in accordance with the requirements set by the entity.
Implementation on Indonesian property real estate industry based on service oriented architecture
Authors: Fajar Ahmad Nurul , Qomariyah Nunung Nurul , Albert  , Siregar Baihaqi 
Published: January 2020

Abstract
This study focuses on the implementation of business property in real estate market. This is due to inability of the current technology to support the property products. Some people feel uncomfortable to buy houses from the online market. Buyers need to be very careful to deal with the sellers as the houses price is considered quite expensive. On the other hand, improving real estate market is still a challenge. This business still needs a physical representation, although it can be sold from the online market. In this paper, we propose the Service Oriented Architecture (SOA) system of virtual reality and drone. We use drone to help scanning the property units and then make 3D models with visual mapping so it can be run in a virtual reality environment, video 360. In real estate, business process can be developed in various ways. Our proposed SOA in this study can be used to integrate all of them.
Resilient method in determining the best architectural model for predicting open unemployment in Indonesia
Authors: Saputra Widodo , Hardinata Jaya Tata , Wanto Anjar 
Published: January 2020

Abstract
The resilient method is a method of Artificial Neural Networks which is often used to make predictions, especially in times series data (continuous). This method is able to make predictions by learning from data that has been done before by first forming the right network architecture model. Therefore, this study will discuss the best network architectural models to make predictions using the resilient method. The data used in this study is open unemployment data according to the highest education completed in Indonesia in 2005 to 2018 based on the semester, which was sourced from the National Labor Force Survey (Sakernas) obtained from the website of the Indonesian Central Bureau of Statistics. Based on this data, a network architecture model will be formed that is used with the Bayesian Regulation method, including 12-6-2, 12-12-2, 12-18-2, 12-24-2, 12-12-12-2, 12-12-18-2, 12-18-18-2 and 12-18-24-2. From these 8 models after training and testing, the results show that the best architectural model is 12-18-2 (12 is the input layer, 18 is the number of hidden neurons and 2 is the output layer). The accuracy of the architectural model for semester 1 and semester 2 is 75% with an MSE value of 0,0022135087 and 0,0044974696.
Proposed TRUTAUT model of technology ddoption for LAPOR!
Authors: Napitupulu Darmawan , Ananto Pamungkas Petrus Dwi , Sudarsono Bernadus Gunawan , Lestari Sri Poedji , Bani Alexius Ulan 
Published: January 2020

Abstract
This study aims to formulate a model for adopting the LAPOR! application technology. based on the user’s perspective. The method used is a comprehensive literature review of the previous two best practice models, TRI and UTAUT. The results showed that there were 13 hypotheses and 10 constructs from the proposed combination model. The entire construct is optimism, innovativeness, discomfort, insecurity, performance expectancy, effort expectancy, social influence, facilitating conditions, behavioral intention and use behavior. In the TRUTAUT combination model, the personality traits aspects of TRI became antacedents of the cognitive aspects of the UTAUT model. The implication of this research is that government institutions can better understand what factors influence the use of technology, especially the LAPOR! application in Indonesia.
Searching the shortest route for distribution of LPG in Medan city using ant colony algorithm
Authors: Nurdin  , Taufiq  , Fajriana  
Published: January 2020

Abstract
National energy needs and efforts to meet needs are currently the topic of issues to be discussed and resolved. One of the problems is LPG (Liquid Petroleum Gas) in the form of environmentally friendly petroleum gas products. Gas scarcity that occurs in each region is different where not all regions experience gas shortages, there are also areas that have excess LPG stock. Therefore, the application of the search route on the LPG base is very necessary. This application applies the ant colony algorithm search method to find the fastest route for the gas base location in the Medan Amplas district area. The Ant Colony algorithm looks for the best solution to solve a problem, in this case the Ant Colony algorithm is the algorithm most often used in mapping distribution locations. From the results of this research, the LPG distribution and distribution process uses an android based application.
The outlier pixel and sub trees that form segments of image
Authors: Manik Efron 
Published: January 2020

Abstract
Segmentation is a very important step in computer vision. Many segmentation methods are found to get the best results. Every method found always has advantages and disadvantages. Minimum spanning tree is one method used to segment images. Some researchers use thresholds as linear combinations of averages and standard deviations for this method. This study aims to see the effect of outliers on the number of segments formed. This study uses a sample of a 5x5 image with an outlier. Suppose that the distribution of side weights (or the difference in intensity of adjacent pixels) is a normal distribution except for one outlier, and the threshold value is equal to the average. If the weight of the outlier data side is equal to 14 to 16, there are 6 segments formed, for weights equal to 17 to 37, there are 4 segments formed, and for weights equal to 38 or more, there are 2 segments formed. The threshold value (corresponding average) changes significantly by changing the value of one outlier data. This will cause changes in the number of segments in the image that are not good in the segmentation method. So the threshold value should not correspond to statistical values.
Performance analysis method of dynamic time warping and k-nearest neighbor in sound based presence system
Authors: Simangungsong Herbet , Mawengkang Herman , Lidya Maya Silvi 
Published: January 2020

Abstract
Verification and identification of a person using biometrics have been widely used as the retina of the eye, the face and voice. In this experiment, such as voice biometrics to identify a person who is used to the system presence. Voice recognition is done by pattern matching between training data and test data. In this study used methods Dynamic Time Warping (DTW), K-Nearest neigbors (KNN) and Fast Frequency Transform (FFT) for voice recognition. DTW is used as a method of pattern recognition, while KNN is used for sound classification. Before testing conducted prior extraction using FFT method. This study uses 100 votes out of 10 people with the amount of each 10 people. Presentations were used as training data by 70% and 30% of test data. Results obtained by dividing the recognized voice to the overall sound. From the results 83.33 % voice recognition.
Level of student satisfaction on lecturer performance with fuzzy inference system (FIS) tsukamoto method
Authors: Sihaloho Tulus Pramita , Nasution Mahyuddin K. M. , Situmorang Zakarias 
Published: January 2020

Abstract
To improve the quality of students in higher education is inseparable from how the performance of lecturers in the teaching-learning process. The quality of lecturers greatly influences how the quality of graduates will be. Qualified lecturers can be seen from the lecturers’ performance in delivering learning material, assessment, discipline, behaviour and appearance. Lecturer performance evaluation can be assessed by students and assessors by study programs through questionnaires in which there are several aspects of assessment. The data processing of the questionnaire will use the Tsukamoto fuzzy method. The Mamdani method is often also known as the average method. In this method, there are 4 the stage for obtaining output, namely the formation of fuzzy sets, application function implications, rule composition and defuzzification. With the fuzzy mamdani method, information will be generated in the form of output of the success level of the teaching lecturer.
Enhanced electrochemical performance of F-doped Li1.2Mn4/6Ni1/6Co1/6O2.35 cathode materials for Li-ion batteries
Authors: Zhu Zhenye , Sang Zhuo , Li Hui 
Published: January 2020

Abstract
F-doped cathode material Li1.2Mn4/6Ni1/6Co1/6O(2.35-x)Fx (x=0,0.05,0.10,0.15) were synthesized successfully by two-step co-precipitation method. X-ray diffraction pattern shows that fluorine doping does not bring impurities, but the lattice parameters increase slightly with fluorine content increasing in Li1.2Mn4/6Ni1/6Co1/6O(2.35-x)Fx. At the current density of 0.5C (125mAhg−1), Li1.2Mn4/6Ni1/6Co1/6O2.30F0.05 has the highest capacity retention (94.56%) and discharge capacity(177.4mA·h/g) after 50th cycles, while capacity retention and discharge capacity after 50th cycles of Li1.2Mn4/6Ni1/6Co1/6O2.35 material are only 86.19% and 164.7 mA·h/g. And Li1.2Mn4/6Ni1/6Co1/6O2.30F0.05 material exhibits a noticeable higher discharge capacity than other Li1.2Mn4/6Ni1/6Co1/6O(2.35-x)Fx (x=0, 0.10,0.15) materials at high current density. The initial discharge specific capacity of Li1.2Mn4/6Ni1/6Co1/6O2.30F0.05 material is increased to 121.1 mA·h/g and 82.3 mA·h/g compared to 91.1 mA·h/g and 66.8 mA·h/g of Li1.2Mn4/6Ni1/6Co1/6O2.35 material at 2C and 5C. It can be concluded that electrochemical performances of Li1.2Mn4/6Ni1/6Co1/6O2.35 material are improved due to fluorine doping.
Comparative study on the effects of suspension way of sample holder on the large-aperture uniformity of refractive index of HfO2 films
Authors: Zhang F , Pan F , Wei Y W , Luo J , Wu Q , Wang Z 
Published: January 2020

Abstract
For large-aperture dielectric film optics, the uniformity of film refractive index across the aperture is crucial to the uniformity of reflectance and transmittance. Herein, a comparative research has been performed on the refractive index uniformity of HfO2 films across the Φ560 mm-aperture sample holder for inclined suspension and horizontal suspension. It’s revealed that the refractive index of HfO2 film at edge position of sample holder increased about 1.52% compared to that of HfO2 film at center position for inclined suspension, while the refractive index varied only about 0.25% for horizontal suspension. The further analysis performed on film crystallization, morphology and microstructure show that the large variation of refractive index between the films at center and edge positions of inclined suspension sample holder was attributed to the different growth properties. The film at the edge crystallized more slightly and was denser, thus being of higher refractive index. And the different growth properties of the two films at center and edge positions can be explained in the light of the co-effects of atomic shadowing, reemission and diffusion of ad-atoms during film growth.
Emission and morphology change of supramolecular platinum(II) complex via the incorporation of a polymeric electrolytic
Authors: Zheng Xiaorui , Wang Wei , Xue Chao , Liu Kangyun , Huang Xiao-ying , Wang Lieping , Ning Binke 
Published: January 2020

Abstract
A novel polymeric hybrids can be produced by the electrostatic assembly of polymeric electrolytic and the platinum(II) complex, which could readily be probed by luminescence spectra and transmission electron microscope. An interesting aggregation and a morphological transformation from unstable fibers to stable spheres have been demonstrated. The emission spectra demonstrating that the excimers liminescence have enhanced in the new nanostructures.
Analysis of crystallization and melting behavior of composites before and after annealing
Authors: Zhu Z H , Zhang N , Wang T , Hao M Y 
Published: January 2020

Abstract
The crystallization and melting behavior of sisal fibers reinforced PLA composites were studied in this work. It can be found that the addition of sisal fiber as reinforcement shortened the nucleation period of PLA and promoted the formation of transverse crystals in PLA composites. Annealing treatment can improve the transition temperature and crystallinity of PLA composites.
Development and Evaluation of a novel High-temperature resistant coating flocculant
Authors: Zhang Fan , Sun Jinsheng , Lv Kaihe , Chang Xiaofeng 
Published: January 2020

Abstract
In the laboratory experiment, 2-Acrylamido-2-methyl-1-propanesulfonic acid (AMPS), N, N-Dimethylacetoacetamide (DMAA), (Z)-Butenedioic anhydrides (MA) and 3-Methacryloxypropyltrimethoxysilane (KH-570) copolymers were used as reaction monomers, potassium persulfate was used as initiator, and a new type of temperature and salt resistant coating flocculant DMA-57 for water-based drilling fluid was synthesized by free radical copolymerization. The synthesis conditions were optimized by orthogonal experiment, and its performance was evaluated. The experimental results show that DMA-57 has good thermal stability, thermal decomposition temperature up to 339 °C. Under the condition of 150 °C, 3.0 MPa and 0.1% dosage, the linear expansion rate of calcium soil can be reduced by 83.83%, and the inhibition rate of calcium soil can be reduced by 67.5%, which has a good effect of flocculation inhibition.