bluuebunny/crossref_metadata_2025_split huggingface dataset:
The productivity of the apple tree in the Vs. M. Krutovsky Botanical Garden
Authors: Bratilova N P , Moksina N V , Gerasimova O A 
Published: March 2021

Abstract
The article presents the results of the research on the productivity of the apple tree of local selection varieties by I.V. Michurin, Clarkson, in the Vs. M. Krutovsky Botanical Garden from 2010 to 2019.The following indicators were analyzed: the number of fruits on a tree (pcs.), fruit weight (g), yield, (kg/tree), frequency of fruiting, specific load of crop fruiting (kg/1 m2 and kg/1 m3 of crown). It was revealed that according to the complex of the studied indicators, such varieties as Bellefleur-kitayka and Bismarck can be considered promising for further selection work and practical gardening.
Smart farming using SIPINDO powered by SMARTseeds: fertilizers recommendation for chili, tomato, and cucumber
Authors: Hartono A , Barus B , Janottama S , Saragih E 
Published: March 2021

Abstract
In the agriculture 4.0 era, farmers need fast and precise information related to fertilizers recommendation. SIPINDO powered by SMARTseeds is an application created by the consortium of East West Indonesia (EWINDO), IPB University, Twente University, Nelen & Schuurmans, AKVO, and ICCO. This application provides services to farmers such as nutrient status and fertilizers recommendation for chili, tomato, and cucumber. The soil properties database is now available for Lampung, West Java, Central Java, Yogyakarta, and East Java. From the database of the soil properties, maps of soil pH, nitrogen, phosphorus, and potassium are made and collected in a data center called the Lizard. Data of nutrient status and fertilizers recommendation in the Lizard are then sent to the farmer’s smartphone according to their coordinates. Fertilizer validation test results in East Java showed that fertilizer dosages recommended by SIPINDO powered by SMARTseeds application on chilies, tomatoes, and cucumber produced better results in production and cost efficiency compared to those of farmers. Therefore the application of SIPINDO powered by SMARTseeds has the opportunity to be developed and disseminated to farmers so that agriculture 4.0 is reached.
Formulation of soil quality index plus to support soil management in preventing soil degradation in dryland farming
Authors: Rachman L M , Hazra F , Hartono A , Mulyanto B , Hanudin E 
Published: March 2021

Abstract
Soil degradation threat to achieving sustainable agriculture is very prominent, especially in tropical areas like Indonesia. Soil degradation is a process of decreasing the function, quality, and productivity of the soil. Therefore, a soil management technique is needed to prevent soil degradation. The crucial problem faced is the unavailability of instruments and methods to assess and monitor soil quality and provide direction in maintaining the soil from soil degradation. Soil types and land suitability classes systems cannot assess soil quality and soil degradation due to land and soil management. Besides, both of the systems are not sensitive and satisfactory to evaluate changes in soil quality and soil degradation. The purpose of this study was to develop Soil Quality Index Plus (SQI-Plus) to evaluate soil quality in supporting development of soil management techniques, monitoring and evaluation of soil quality, and providing recommendations for maintaining soil quality to prevent soil degradation. SQI-Plus is presented in numerical forms and followed by letters which indicating one or more limiting factors for plant growth and production which needs to be repaired or rehabilitated to achieve optimal production and preventing soil degradation.
Chemical properties of tempoyak from Lima Puluh Kota district of West Sumatera, Indonesia
Authors: Rahma A , Purwati E , Juliyarsi I , Ferawati  
Published: March 2021

Abstract
Tempoyak is a traditional food from durian, which is made by processed, fermented durian flesh with the addition of salt and fermentation in anaerobic conditions stored in a closed state. This study aims to determine the chemical properties of tempoyak, namely the value of protein, fat content, water content, pH, and TTA (Total Titrable Acid) of the Lima Puluh Kota District. The method used is descriptive method and analysis in the laboratory. The samples used in this study are Durian meat (Duriozibethinus L.) with four treatments, the first treatment uses durian meat only (TC1), the second durian meat with banana leaf packaging (TC2), the third durian meat is added with chili (TC3), and the four durian slices of meat added with chili and banana leaf packaging (TC4). All treatments were then stored in anaerobic conditions and aged for two weeks. The results showed that the protein content was 1.42% - 6.49%. The highest was in TC1 tempoyak, 1.03% -3.04% fat content and the highest was in TC1 tempoyak, 75.60% -89.97% water content and the highest in tempoyak TC3, pH 3.8 - 4.1 and highest in tempoyak TC1, Total Titrable Acid 0.29% -0.34% and highest in tempoyak TC3 and TC4.
Quality of fermented goat milk with carrot juice during cold storage
Authors: Kurnia Y F , Suharto E L S , Purwati E 
Published: March 2021

Abstract
The purpose of this research was to determine the effect of storage duration in refrigerator temperature on moisture content, pH, and antioxidant activity of fermented goat milk (Lactobacillus fermentum PE2) with the addition of carrot juice. The experiment used a completely randomized design with 5 treatments of goat milk fermentation at the refrigerator temperature of 0, 5, 10, 15, and 20 days with 4 replications. The results showed that the storage duration at a refrigerator temperature had a significant effect (P<0.05) on the antioxidant activity but no noticeable effect (P>0.05) on the moisture content and pH. Goat milk fermentation with Lactobacillus fermentum PE2 can maintain quality until 20 days at a refrigerator temperature with the moisture content 81.32%, pH 4.48, and antioxidant activity 23.50%.
Mixed Low-density Demolition Waste in Production of Lightweight Cement-based Composites
Authors: Pokorný Jaroslav , Šál Jiří , Ševčík Radek 
Published: March 2021

Abstract
Lightweight concretes are traditionally used composites intended for non-bearing applications. In their composition, various types of lightweight natural as well as industrially produced aggregates are employed. Regard to the considerable aggregates consumption, the potential application of mixed low-density demolition waste (MDW) in production of cement-based composites was studied in this paper. In mixes with maintained workability, silica sand was replaced by MDW in the amount of 0 – 100 vol. %. On hardened developed composites, basic physical properties, strength properties and dynamic moduli were determined and compared with control material after 28 days of water curing. Due to reduced weight of waste aggregate compared with the silica sand, hardened composites showed importantly lower bulk density. However, their increasing porosity induced by higher MDW additions led to the decrease of compressive and flexural strengths and dynamic moduli values. With respect to the maintaining of mechanical resistance, quantities of incorporated MDW not exceeding 25 % were chosen as an optimal replacements ratio.
Influence of Amount of Filler on Thermal Resistance of Bitumen Sheets
Authors: Plachý Jan , Vysoká Jana , Vejmelka Radek 
Published: March 2021

Abstract
The paper deals with the correlation between the amount of fillers and the thermal resistance of bitumen sheets under EN 1110:2011. Based on the analysis of samples of bitumen sheets used for the insulation of concrete bridges, the standard EN 14695:2010 indicates what the usual amount of fillers is and what the value of the resistance to flow at elevated temperature is. Bitumen sheets, which are used in the Czech and Slovak Republic, were used as samples. The samples represented bitumen sheets modified with polymers of elastomeric and plastmeric nature. Bitumen sheets were of two types with and without protective covering. It was found that fly ash and micro-milled limestone were used as fillers in the bituminous substance of the sheets. The dependence between the amount of fillers and the resistance to flow at elevated temperature was only confirmed in some of the bitumen sheets samples.
Aging Simulation of Plastic Products due to Weather Conditions
Authors: Machova Petra , Crhakova Lucie , Vejvoda Michal , Kraus Michal 
Published: March 2021

Abstract
The paper describes the aging of plastic products due to weather conditions. It focuses on the analysis of aging and weathering of plastic products, or parts of building structures. As part of the research, the Xenotest Alfa device was used to simulate the weathering of plastic products. Xenotest Alfa simulates, for example, variable temperature, solar radiation, humidity and different types of climate. Samples of plastic and wood-plastic products were placed in the device, where the test of accelerated degradation and light stability was performed. The motivation for using the device is the effect of UV radiation on the samples, which causes the aging of the material and its gradual degradation, which may in the future cause the product to malfunction or degrade its color, as shown by this research.
Middleware Development to Connect Telegram Messenger and Instant Messenger for the Elderly
Authors: Swandi Charles Eka , Nugraha Kristian Adi , Sebastian Danny , Restyandito  
Published: March 2021

Abstract
For the elderly, instant messengers can be a media for them to interact with other people so that they don’t feel lonely. However, the elderly often find it difficult to interact with big instant messengers such as LINE, Whatsapp and Telegram, which is why an instant messenger designed specifically for the elderly is needed. Unfortunately, there are several limitations in which the messages can only be exchanged within the same instant messenger. To tackle this problem, a middleware that will be used to connect this instant messaging for the elderly with Telegram messenger. The middleware is developed with API and Webhook method. Other than that, Telegram bot is used so that messages can be sent out from Telegram. Through the testing done, the middleware developed has successfully sent out messages from Telegram to the instant messenger for elderly and vice versa.
Implementation of Socket Priority Module for Unmanned Aerial Vehicle Network using FlyNetSimulator
Authors: Windiatmaja Jauzak Hussaini , Tjahaja Johannes Calvin , Amin Kgs. Al , Sari Riri Fitri 
Published: March 2021

Abstract
Unmanned aerial vehicle (UAV) is an aircraft without a human pilot onboard and a sort of unmanned vehicle. UAV Network research activities in the real world can pose several challenges, especially in urban environments or in densely populated environments. This is due to the nature of the UAV which requires a large area of operation. Therefore, digital simulation is vital in conducting research related to UAV and its networks. One of the UAV simulators recently developed is FlyNetSim. FlyNetSim is an open-source UAV Network Simulator based on NS-3 and Ardupilot. In the application, UAV can have some network-related problems. One of them is when a UAV is in an environment that has a lot of interfering networks because it is contending a network channel. This can cause network delay. These delays will raise with the increase in the number of nodes that interfere with the UAV. To overcome the problem of interfering nodes, we propose to add a priority set module for UAV and Ground Control Station (GCS). The proposed module will set priority for the UAV and GCS socket. This module is intended to give priority to packets sent by UAVs or GCS. Later the packet that has priority will be sent first to reduce the delay caused by the appearance of interfering nodes. Setting priority in the socket may reduce the average delay caused by contending nodes. Test result shows that there is a 16.2% reduction of average delay. Test result also shows that there is a 4% raise in packet delivery ratio.
Document Searching of EPPS Test Result Using Indexing Method
Authors: Krisna Kahfiara , Mulyati Sri 
Published: March 2021

Abstract
This study focuses on documents searching on the EPPS test result, mainly administered in the education sector for selecting prospective students in universities’ admissions process. There has been a considerable increase of admission data along with annually administered admission test for prospective students in every beginning of an academic year. Some faculties may administer the EPPS test in the second stage test of admission process after the prospective students pass the first stage in addition to having the general admission test. These several tests lead to a huge data accumulation with different information, making it difficult for the organizers to locate the document containing 15 aspects of required information in a comprehensive information display. Thus, it is necessary to apply an indexing method by having a predetermined index to retrieve required information in a particular document or to find other related documents by way of indexing method. This research used 74 pdf documents as the dataset. In particular, 60 datasets were used as references to retrieve phrases on the specified data, and 14 datasets were used to test data. The results revealed the most significant data with an average precision of 0.89, recall of 0.93 and f-measureof 0.91.
An Integrated Metamodel for Enterprise Architecture using Open Government Data Approach: A Conceptual Framework
Authors: Arzimi Intan Maizura , Bakar Nur Azaliah Abu , Mahrin Mohd Naz'ri , Kama Mohd Nazri , Hussein Surya Sumarni 
Published: March 2021

Abstract
The government is always looking forward to providing citizens with excellent service. One of the government’s significant agenda is to identify ways to improve the quality of service and deliver the best service to their citizens. Both Malaysia Open Government Data (MOGD) and Malaysia Government Enterprise Architecture (MyGovEA) initiative play a vital role in assisting the government in providing excellent service deliverables to the citizens. These domains must integrate each other towards the country’s economic and social growth. In this paper, we propose the new conceptual model on a new metamodel for the OGD using the Government Enterprise Architecture (GEA) modeling process. Based on the OGD problem and challenges define map with the Archimate metamodel notation to classify the OGD context with the EA metamodel. The study becomes an opportunity for the MyGovEA team and the researchers to highlight EA integration across industry and agencies.
Random Effect Meta-Analytic Structural Equation Modeling (MASEM) Estimation Using The Method Of Moment: Case Study On The Poverty In The Island Of Java
Authors: Standsyah R E , Otok B W , Suharsono A 
Published: March 2021

Abstract
Meta-Analytic Structural Equation Modeling (MASEM) is divided into two types according to the homogeneity of the effect size, the fixed-effects MASEM, and the random-effects MASEM. The random effects of MASEM are heterogeneous or there are variations in the effects of the study population, thus implying both between-study variance and within-study variance. Accordingly, the process of estimating the MASEM random-effects parameters involves an additional process, the estimation of the variance between studies. The initial process of MASEM parameters was estimated with generalized least squares (GLS) and then estimated the variance between studies. The iterative EM algorithm is used to estimate the variances between studies of random effects MASEM GLS but this method may not achieve convergence. So, a non-iterative procedure was developed to estimate the variance between studies using the moment method. Data on poverty on the island of Java are likely to differ. Poverty data, if collected from a different population in between province, will be more accurate and in line with targets. The poverty model with the economy, human resources, and health as the right exogenous variables on the island of Java. The results of applied random-effect MASEM GLS with the method of moment approach to estimate the variance between studies on a poverty model show that the coefficient of each economic, health and human resources variable on poverty is 0.4942, -0.1106, and -0.2843. When human resources increase along with health, people’s creativity and productivity also increase, it affects the decline in the value of economic indicators or is equivalent to the increase in the economy of the community so that poverty decreases.
A Prototype of Portable Digital Forensics Imaging Tools using Raspberry Device
Authors: Yudha F , Ramadhani E , Komaryan R M 
Published: March 2021

Abstract
One of the digital forensics activities has the goal to prove a cybercrime. There are several stages in digital forensics when doing an investigation. Each stage has its suitable hardware and software that is used while investigating a case. Standalone forensics hardware is a suitable media in the process of investigation. It can do an acquisition and imaging process at the same time as the investigation process. Nowadays, standalone forensics hardware for imaging devices has a very high price. This paper gives a solution to develop low budget portable imaging forensics devices using a raspberry device. The device enables us to do an acquisition to a hard disk or flash drive. The output has a raw format file type i.e.dd. This device includes a logging file consisting of detailed information related to the digital evidence also hashing to provide file integrity. The result of this paper describes how to construct a prototype low budget portable device for digital forensics acquisition using a raspberry device and how to operate it in GUI. The prototype was successfully created and tested in several scenarios. The performance test of this device has a result of that transfer rate of 1,85 MB/s.
Exploring Familiarity and Participation in Online Gig Economy Among Indonesians
Authors: Aristi Nina Mia , Pratama Ahmad R 
Published: March 2021

Abstract
Online gig economy has been rapidly growing and shown a promising prospect in Indonesia, but little is known about familiarity and participation of Indonesians in this new business model. This study tries to fill that gap in literature by exploring familiarity and participation in four different types of online gig economy, i.e. transportation-based service (TS), professional service (PS), asset-sharing (AS), and handmade goods, household, and miscellaneous services (HGHM) among Indonesians based on an online survey of 385 participants. The primary data were analyzed by using descriptive statistics, multiple correspondence analysis (MCA) and logistic regression models to show that most Indonesians are TS gig users whereas PS is the most preferred category by Indonesian gig workers. This study found some differences in characteristics of gig users and gig workers in different categories of online gig economy. Most notably, it suggests the existence of sexual, generational, geographical, and socioeconomic gaps among Indonesians when it comes to their participation in different types of online gig economy. Despite the high participation rate in the online gig economy, the familiarity rate in both the concept and the term "online gig economy" is relatively low. The findings from this study can shed light and serve as a steppingstone for further research on the online gig economy as a new business model and dig deeper into its potential in Indonesia
Penalty Strategy in The Fitness Function of Grey Wolf Optimizer for Minimum Spanning Tree Problem
Authors: Zukhri Z , Paputungan I V , Handayani N S , Satriadi V 
Published: March 2021

Abstract
The Grey Wolf Optimizer (GWO) is a relatively new population-based optimizer. Various optimization problems have been solved using GWO. This paper presents an experiment on how to apply GWO to solve the minimum spanning tree (MST) problem. MST is normally solved using revision strategy when formulating the fitness in other population-based algorithms. Another strategy, called Penalty strategy, is used in the experiment. Existing dataset for MST problem is tested using GWO. The experiment showed that implementation of penalty strategy in the fitness function of GWO can find a solution with almost 96% accuracy.
On the possibility of obtaining ultra-supercritical steam parameters at Nuclear Power Plants with fast neutron reactors using non-nuclear steam superheating
Authors: Kostarev V S , Shirmanov I A , Anikin A A , Shcheklein S E 
Published: March 2021

Abstract
Nuclear and thermal power plants constitute the largest part of Russia’s power grid (about 67%). Today the world thermal power industry has already begun the transition to ultra-supercritical steam parameters, which makes it possible to increase the efficiency and reduce fuel consumption, and, accordingly, the discharge of harmful substances into the environment. Nuclear power plants (NPPs) need to increase their performance to keep up with other electric energy producers in the market. One of the ways to increase the energy efficiency of nuclear power plants with fast reactors is to improve the thermodynamic cycle. The paper presents computer-simulated steam-cycle arrangements for NPPs with a BN-1200 reactor using non-nuclear superheating of steam, as well as steam compression to obtain super-supercritical steam parameters, and an assessment of the efficiency of using these cycle arrangements.
Decision-making algorithm for the development of the district of electrical grids
Authors: Semenova N G , Chernova A D , Vlatskaya L A 
Published: March 2021

Abstract
The article presents the stages and operational actions of the formation of a priority alternative for the development of the district of electrical grids. It is proposed to make a priority alternative from the preferred variants for the development of electrical grids objects. The selection and ranking of variants is influenced by the financial constraint, the technical condition of the equipment, the consequences of failure. The article presents two-level block diagram of the decision-making process at the local and global levels. It is proposed at the local level to select the variant for the development of an object of electrical grids by multi-criteria assessment and using neural network technology. At the global level, it is proposed to use the integration of an algorithm for constructing a decision tree and an algorithm for solving an optimization problem.
Installation of absorption refrigerating machines for the needs of conditioning of the Armada Mall
Authors: Sokolov V Y , Sokolova T Y 
Published: March 2021

Abstract
The energy strategy of Russia for the period up to 2020 noted that in order to ensure energy security it is necessary to solve two priority issues: firstly, the modernization of the obsolete and physically worn out technological base of the fuel and energy complex using the best domestic and relevant foreign technologies for our conditions; secondly, it requires a change in the consumption pattern and distribution of production of fuel and energy resources. The work analyzed the state and considered the characteristics of the energy source. The concept of increasing the efficiency of the thermal power plant has been developed. As a result of analysis of existing plants for additional generation of cold from a more heated power generator, a scheme and theoretical cycle of absorption bromide of a lithium refrigerating machine is made. The results were obtained on the expected annual savings of the Armada Mall operating costs at the application of lithium refrigeration machine absorb bromide for the annual cold demand of 3,4 million kWh.