bluuebunny/crossref_metadata_2025 huggingface dataset:
The international students’ perception towards online learning using the tencent meeting during covid-19 outbreak
Authors: Wiranota H , Wijaya T T
Published: March 2021

The aim of this study is to find the international students’ perception towards online learning using the Tencent Meeting, or the international version is VooV. The descriptive qualitative design was conducted in this study. The total of participants were thirty students in Guangxi Normal University, China academic year 2019/2020. The data was obtained using an end-of-semester questionnaire and then follow-up interviews. The researchers examined the students feedback and found that in general the Tencent Meeting is well received by the students. The participants agreed that online learning using the Tencent Meeting made the learning process well managed, the Tencent meeting was easy to use, the Tencent Meeting was affordable to learn. This point, the participants were enthusiastic in distance learning and considered that online learning using the Tencent Meeting was efficient during COVID-19 outbreak. At last, the respondents recommended this application to the other students. Drawbacks and suggestions for improvement were also discussed.
RDBMS dan Google Maps Integration Model for WebGIS Based Land Ownerships Data Visualization
Authors: Sutanta E , Kumalasanti RA , Nurnawati EK , Iswahyudi C , Putra T A
Published: March 2021

Map-based visualization of land ownership data is much needed by policymakers, both in government and private institutions. The utilization of this data is primarily to support macro planning, policy-making, and good governance. On the other hand, there are currently many application systems available which are the RDBMS database. This research examines the proposed RDBMS integration model and Google Maps maps to visualize land ownership data in a dynamic map view. The prototyping method is applied in this study to show how the available RDBMS can be improved to visualize land ownership data in a WebGIS-based application. The proposed model is tested using an application prototype. Technically the model can be implemented without significant constraints, but the actual implementation still faces obstacles, especially related to policies related to the cross-sectoral utilization of population databases and the obligation to maintain data confidentiality.
Problem-Based Learning vs Student Teams Achievement Divisions Assessed from Student’s Mathematics Problem Solving Ability
Authors: Danuri  , Jati Vita Dewi Prastiwi , Jana Padrul
Published: March 2021

This research aims: (1) to find out the effect of the PBL (2) to find out the effect of the STAD (3) and to find out the effectiveness between the PBL and STAD Models to mathematical problem-solving skills of third-grade students at SD N Mejing 2. This type of research is a Quasi Experiment with a research design Pretest-Posttest Only Control Design. The instruments used in this research are problem-solving skills test and observation of learning activities. Data analysis in this research used t-test with a significant level of 5%. The final results of this research show that: (1) There is an influence between students’ problem-solving skills before and after the PBL model applied. The results of the analysis are t count = -10,081 < t table = -1,703; (2) There is an influence between students’ problem-solving skills before and after the STAD learning model applied. The results of the analysis are t count = -5,403 < t table = -1,703; (3) Learning with PBL more effective than STAD against students’ mathematical problem-solving skills, analyzed by t-test of two samples. The results of the analysis are t count = 2.970 > t table = 1.674, the significance level of 5%.
An alternative to a butterfly pea flowers and spices dip as a creative endeavour in the village of Bawuran
Authors: Amrih D , Sutakwa A
Published: March 2021

Bawuran Village is one of Pleret Subdistrict villages, Bantul Regency, where most of the residents’ livelihoods are casual daily labourers and farm labourers/plantations. Therefore, it is necessary to have a creative business in the village of Bawuran that can support and improve citizens’ economy. One of the innovative businesses that can be developed in Bawuran Village is the use of spices. And by adding butterfly pea flowers to this spiced drink can add nutritional value. With this dipped butterfly pea flower beverage production, it is expected to become an alternative creative effort in Bawuran Village.
Training of Frozen Cassava (Manihot esculenta) Processing to Increase Selling Value
Authors: Nadia L S , Sutakwa A , Suharman  , Amrih D , Syarifah A N
Published: March 2021

Frozen cassava is one of the food innovations of cassava based. The long shelf life of frozen cassava can increase its selling value so that it can be used as a typical souvenir at Sosok Peak. The priority problem to be resolved is the lack of knowledge about the processing of cassava products so that the product is marketable and as an alternative for souvenirs. Following up on the results of the problem identification, the activity carried out was training on the process of making frozen cassava. The covid-19 pandemic activities were carried out online, through webinars, tutorials accessed through https://youtu.be/EQeePrurIEY and training modules distributed to partners. The output of this service was in the form of knowledge and skills of the women of the P2WKSS group of Sanan hamlet, Bawuran village regarding frozen cassava; new business of the P2WKSS hamlet of Sanan; frozen cassava production process video; learning module.
Awareness Implementation of The Prevention of Health Protection of Covid-19
Authors: Purnomo Bayu Gilang , Rohmantoro Didik , Yoanita Yulia Venti , Permana Muhammad Priya , Amiruddin Muhamad
Published: March 2021

The spread of the Covid-19 virus continues to increase, so it is necessary to take preventive measures through increasing public awareness of the implementation of the COVID-19 prevention health protocol. Raising awareness can be done through socialization starting from the dangers of civid-19 and implementing standards for the prevention of covid-19 health protocols. The method used can be through the lecture method through online meetings. the media that can be used are the material of the dangers of covid-19, and the health protocol for the prevention of covid-19 according to the standards of the Ministry of Health of the Republic of Indonesia. evaluation is carried out by providing a questionnaire before and after socialization activities. The results of the socialization show a significance of 0.000, which is less than the significance level (a) of 0.05. These results mean that there is a significant difference between awareness of the dangers of covid-19 and health protocol care behavior before and after socialization. The t table shows that the t count is negative, namely 7.844, which means that the average before was lower than after the socialization was carried out.
Utilization of Information Technology in Improving Teacher’s Performance
Authors: Kaswi  , Suad  , Setiadi Gunawan
Published: March 2021

This study aims to determine the magnitude of the influence of school principal strengthening education and training on teacher performance, the magnitude of the influence of school climate on teacher performance, the magnitude of the influence of education and training to strengthen principals and school climate together on teacher performance at Public Elementary Schools in Winong District, Pati Regency. This study was designed using a quantitative approach and is a type of inferential research that proves the effect of education and strengthening training for principals and school climate on teacher performance that has been formulated in the hypothesis. It is expected that researchers will be able to determine the significance level of the independent variables against the bound variables used in the study. The data used to analyze behaviors related to school principal strengthening education and training, school climate, and teacher performance were obtained through the data collection method by taking a sample from a population and using a questionnaire as a data collection tool. The questionnaire used is in accordance with the grid and the research variable indicators.
Ethno-Edutainment Digital Module to Increase Students’ Concept Understanding
Authors: Ardianti Sekar Dwi , Wanabuliandari Savitri
Published: March 2021

The purpose of this study was to analyze effectiveness of ethno-edutainment digital moduleto increase students’ concept understanding. The ethno-edutainment digital modulewas developed with the Borg and Gall models developed. The development phase of the ethno-edutainment digital moduleadds preliminary studios, product development and validation, and product trial trials. In testing the product, a large-scale trial was conducted. The effectiveness test was carried out on a large-scale trial with research subjects of fourth grade students at SD 4 Karangbener. The effectiveness of the ethno-edutainment digital modulewas accepted using test techniques. Based on N-gain trials Increased pretest and posttest scores of students produced 25% students increased in the high category, 62,5% students increased in the moderate category, and 12,5% students increased in the low category.
Development of Learning Media Technology Based on Natural Science Local Wisdom Materials
Authors: Shofa Ahmad , Su’ad  , Murtono
Published: March 2021

The objectives of this study were: to analyze teacher input, find out how to compile teaching materials, and to see the effectiveness of thematic integrated teaching materials based on local wisdom of science subject material theme 3: healthy food in grade 5 elementary school students. This research was conducted due to a lack of teaching materials, teachers were unable to develop teaching materials, and students’ lack of insight into local wisdom. This research uses research and development methods. The data analysis technique used descriptive qualitative and quantitative analysis techniques. Qualitative data in the form of input, criticism, and suggestions for product improvements presented in a questionnaire instrument for reviewing teaching materials. Meanwhile, quantitative data in the form of numbers obtained from product trials. The results showed that the module teaching materials were feasible and effective. The feasibility of this thematic module product is based on the results of the material expert’s validation, the total score is 73 and 116 in the very good category. The results of the effectiveness test in the product trial and test using the experimental class N-Gain value were 85.30% and 88.54% in the effective category.
Social Science Learning In Covid 19 Pandemic By Using Internet Media
Authors: Sunoto  , Su’ad  , Ismaya Erik Aditia
Published: March 2021

During the current covid 19 pandemic, fourth grade students of SDN Sumbermulyo 02 Winong District Pati Regency are learning online. Initially during the covid 19 pandemic, grade IV SDN Sumbermulyo 02 Winong District Pati Regency students had a little difficulty learning social studies online. Because the fourth grade students of SDN Sumbermulyo 02 Winong District Pati Regency before covid 19 were used to learning face-to-face (outside the network). Based on these problems, researchers conducted research on the use of internet media in social studies learning for grade IV SDN Sumbermulyo 02 Winong District Pati Regency during the covid 19 pandemic. This study aims to describe the use of internet media in social studies learning for grade IV SDN Sumbermulyo 02 Winong District Pati Regency during the covid 19 pandemic. Therefore, the method used is a qualitative method with data collection techniques of observation, interviews, and documentation. Based on data and analysis, there are two kinds of impact of internet media in social studies learning for class IV SDN Sumbermulyo 02 Winong District Pati Regency during the covid 19 pandemic, namely positive and negative. The positive impact of internet media for social studies learning for grade IV SDN Sumbermulyo 02 Winong District Pati Regency for the covid 19 pandemic is that children quickly find out information about social studies and children can quickly complete assignments. Then, the impact of internet media on social studies learning for fourth grade students of SDN Sumbermulyo Winong District Pati Regency in the covid 19 pandemic. Currently, students’ eye health is reduced because they often stare at the screen of a smartphone or tab or notebook or laptop or computer when looking for information about social science. Social studies learning using internet media for class IV SDN Sumbermulyo 02 Winong District Pati Regency during the covid 19 pandemic became effective and efficient.
Manipulative Media Technology for Addition and Subtraction of Integers in Elementary Schools
Authors: Yuliwijayanti Anna , Santoso  , Madjdi Achmad Hilal
Published: March 2021

The purpose of this study was to produce manipulative media to understand the concept of addition and subtraction of integers in grade VI students. This research method refers to Borg and Gall’s theory in ten research steps including information gathering, research planning, initial product development, initial field trials, revision of trial results, main product field testing, revision of field product test results, large-scale field trials. final product revision. Data collection techniques were carried out through observation, interviews, and questionnaires. Data analysis used qualitative and quantitative analysis techniques including learning observations, and validation of manipulative media products. Sources of data in this study were teachers and students of grade VI SDN Sumbangrejo and SDN Segoromulyo. The results of this development research indicate that the media developed in the form of manipulative media made of wood can be said to be suitable for use in learning. Based on the validation from the expert, it was noted that the product was in the good category with an average score of 87%. whereas from the results of student responses the average percentage of responses to the media reached 90%. So that learning integers about addition and subtraction with manipulative media runs effectively.
Developing Culture-Based Mathematics Learning Media with Adobe Flash for JHS Students
Authors: Saputra Wahyu Budi , Utami Niken Wahyu , Kusuma Ibrohim Aji
Published: March 2021

This research aims to develop a mathematics learning media based on Yogyakarta culture using Adobe Flash CS 6 for seventh-grade Junior High School (JHS) students using Analysis, Design, Development, Implementation, and Evaluation (ADDIE) procedure. We evaluated the media based on its validity, practicality, and effectiveness. The validity of media was assesed by two qualified experts (content and media). The practicality was measured from a valid questionnaire from 30 Yogyakarta JHS students after using the media. Moreover, the effectiveness score was obtained from those students’ test. As a result, the developed learning media fulfill the validity, practicality, and effectiveness criteria, which score 3.15 of 4 (content), 3.23 of 4 (media), 3.23 of 4, and 78.6 of 100, respectively.
Information Technology for Sustainable Development In Vocational Education
Authors: Dumbiri David Nwanna , Permana Septian Aji
Published: March 2021

Over the years the path to global development has been set up so as to address the developmental needs of every nation in the world. The dynamic nature of the society has consistently made this developmental trajectory to experience change that will meet the needs of the society. Trainings, practical, workshops and different hands on deck activities have been made available with vocational education for interested individuals to equip themselves based on dynamic nature of the society. Recent use of information technological device by different sectors of life has contributed its developmental quota to the society by making life tasks easy. Also, the contribution of information technology has solved lots of issues in diverse sector of life which could jeopardize the interest of the present and future generation. Thus, this paper used qualitative approach to ascertain the role of information technology for sustainable development in vocational education.
Innovative development of cattle breeding: status, problems and prospects
Authors: Litvina N I , Dolgova E A , Litvina N V
Published: March 2021

At the present stage of economic development, the main factor that ensures the stability and competitiveness of agricultural production is the development of scientific and technological progress. Analysis of cattle breeding in Russia is the evidence of the need for comprehensive technological modernization of production, introduction of advanced scientific achievements in practical activity and the overall industry transition to innovative way of development. The key factors hindering the development of national cattle breeding on innovative basis are noted, in particular, the lack of own financial resources, the high cost of innovations and the low investment attractiveness of the agricultural sector. It is indicated that a new level of development of national cattle breeding is the widespread use of digital and information and communication technologies in the production process. The author substantiates the defining role of the state in activating innovative activities in cattle breeding and the importance of implementing direct and indirect measures of state support at all stages of innovative development of the industry. Due to the limited budget support, it is important to attract private capital to the industry and create the industry investment fund to finance innovative projects in the dairy and beef cattle breeding.
Innovation development of the North-Western Federal District
Authors: Popadyuk T G , Popadyuk N K , Rozhdestvenskaya I A , Panina O V
Published: March 2021

The aim of the study is to investigate and analyse the different aspects of the innovation development of the North-Western Federal District (the Russian Federation). The concepts of innovations, innovation development, innovative economy, knowledge-based economy, state innovation system, innovation ecosystem and regional innovation development have been defined. Also, author’s definition of the innovative development of a region was proposed. Documents regulating the innovation strategy and innovation policy of the North-Western Federal District have been analysed. The justification of the undertaken topic comes from the need for defining strong areas of the innovation potential of the North-Western Federal District and requirement for consideration of the regional innovation system elements of the North-Western Federal District such as knowledge-producing environment, knowledge transfer mechanisms, business environment and state, and its innovation infrastructure. The methodology of the study involves studying of the theoretical framework of the innovations, quantitative and qualitative indicators of the innovation development of the North-Western Federal District, and analysis and synthesis of these data. The main results of the study are: innovative development of the region correlates with the general direction of the country’s innovative development; the regional innovation system includes the same macroblocks as the national innovation system does; the North-Western region includes the well-developed innovation infrastructure and all elements of the innovation system. Conclusions on the direction of the innovation development of the North-Western Federal District towards the world’s advanced countries with innovative economy or economy of knowledge as well as on the role of the innovation factor in the regional development have been drawn.
Cluster mechanism of industrial development based on the possibility of saving on the growth of production scales
Authors: Khamidullin M R , Kiamova N I , Gerasimova O Yu
Published: March 2021

In recent years, the economic development trend in Russia and other countries has been based on the cluster approach. Increasing competitiveness through the use of the cluster mechanism is an effective means of developing industrial production, where the main goal of any enterprise is to obtain maximum profit. For a good and successful confrontation in the conditions of market competition, Russia needs to create large industrial corporations - centers, conduct integration processes and form large regional clusters. The formation of large regional engineering clusters within the subjects of the Russian Federation will ensure the inflow of investment from outside, and will create conditions for competitive advantage for large, small and medium-sized businesses in general. Therefore, we can conclude that the development of the tasks presented in the research, which identified the main ways of cluster development based on the creation of a regional industrial engineering cluster, is relevant, and has novelty and practical significance.
Elemental composition of Apium graveolens L. seeds as an indicator of the nutritional value of competitive organic products
Authors: Zelenkov V N , Ivanova M I , Latushkin V V , Razin O A
Published: March 2021

The elemental composition ofApium graveolensL seeds of root (Cupid and Root gribovsky) and leaf varieties (Samurai and Tender) was determined using x-ray fluorescence analysis. In quantitative terms, the macronutrients are dominated by Ca (1.59-2.24% dry matter) and K (0.8-1.28%), as well as Na, P, S, Mg, and microelements – iron, zinc and manganese. It is shown that there is a wide variability of indicators for macro-and microelements. Significant varietal differences in accumulation were noted for sodium, silicon, chlorine, strontium (variability of more than 70%), as well as aluminum, iron, titanium, nickel, copper, and bromine. Varieties Cupid is characterized by increased accumulation of iron, silicon, sulfur, potassium, titanium, zinc, zirconium; varieties Samurai – sodium, phosphorus, sulphur, chlorine, calcium; varieties Tender – potassium, manganese, copper, bromine, and barium; Root gribovskiy – manganese and bromine. A high level of variation in the elemental composition of celery seeds of root and leaf varieties makes it possible to select plants that differ in an increased content of deficient macro-and microelements.
Economy of vegetable growing of the Russian Federation in modern conditions
Authors: Pivovarov V F , Soldatenko A V , Musaev F B , Razin A F , Gavrish S F
Published: March 2021

The financial and economic crisis of the last four or five years and the economic sanctions imposed on our country have had a positive impact on the development of national vegetable production, in particular, and agricultural production in general. There is a slight increase and stabilization of the gross harvest of vegetables. Greenhouse vegetable growing is developing dynamically. The area under winter greenhouses is growing by 10-15% every year, and the gross harvest of vegetables in protected soil exceeded a billion tons last year. The level of import of vegetables has sharply decreased, to 1 billion dollars, and exports of products have grown by two or three times. Unfortunately, the weak point in the industry is still seed production; the dependence on seed imports is high – up to 25%. Import substitution for seeds is slower than for vegetable products. At the same time, there is both scientific and production potential for successful national seed production. The plan has been developed to improve the situation by 2025.
Economic bases of the original carrot seed production in the conditions of Moscow region
Authors: Khovrin A N , Sokolova L M , Kornev A V , Razin O A , Ibragimbekov M G
Published: March 2021

The aim of the research: to show the economic basis for the original carrot seed production of cultivar Vitaminnaya 6 breeding of the Federal State Budgetary Scientific Institute Federal Scientific Vegetable Center in the conditions of the Moscow region. The work was carried out in 2015-2018. Root carrots were grown on an experimental base, seed plants in a membranous unheated greenhouse. The meteorological conditions during the experiment period were favorable for the formation of root crops and the ripening of carrot seeds. A transfer method was used to produce the original carrot seeds. Under conditions of the Moscow Region, when growing seedlings of carrots in a membranous greenhouse, the yield of carrot seeds of cultivar Vitaminnaya 6 varied from 95 g/m2 to 130 g/m2. Analysis of the original carrot seeds showed that seed germination energy was 78-87%, germination changed from 89 to 93%. With the transfer method of cultivating the original of carrot seeds, production costs amounted to 17795.8 thousand rub/ha (2015 year) and 18542.9 thousand rub/ha (2017 year). Up to 40% of production costs are accounted for cleaning carrots and the handicrafts associated with their storage, reassembly and planting in the spring. The cost price of 1 kg of original carrot seeds of cultivar Vitaminnaya 6 in 2015 was 38602.6 rub., in 2017 - 36997.2 rub.
Business management in modern economic management conditions
Authors: Ilyin S Yu , Mandych I A , Krasnyanskaya O V , Bykova A V
Published: March 2021

The paper presents indicators of modern business management, based on the current economic situation of its management. When selecting indicators, the emphasis is placed on the last stage of management evolution, which is characterized by the primary role of scientific and technical achievements in the development of the economy, including its commercial sector, and, accordingly, such resulting and factor indicators as changes in income and expenses, direct and indirect ratio of income and profit to expenditures on human capital, investment capital, and innovation capital are taken into account. The construction of these dependencies between changes in income and expenses is carried out through a combination of different types of dependencies (additive, multiplicative, multiple), which help to identify the degree of influence of each factor indicator on the resulting indicators and take actions to maximize the result and minimize business costs using the computational and constructive method in interaction with individual elements of mathematical analysis. The material is useful for entrepreneurs, regardless of their type of activity and organizational and legal status, educational and scientific figures, students of higher and secondary specialized institutions of economic and managerial programs, specialties and profiles.
A system of spatially connected federalism based on regional specialization
Authors: Buhtiyarova T I , Korotina N Yu , Hilinskaya I V
Published: March 2021

The relevance of the article is due to the need to develop a model of federalism in Russia in the context of the existing problem of asymmetry of territorial development, which has not yet been eliminated by the current federal policy. The problem of the asymmetry of Russian regions is caused by a variety of natural, industrial, ethnic, social, and geographical conditions. This entails an asymmetry of economic and budgetary indicators: gross regional product, investments, revenues and expenditures of regional budgets. As a reason for the ineffectiveness of the pursued policy of federalism, the authors highlight a single universal approach in relations between the federal center and the regions. The article proposes a transition from a universal model to a model that considers the specialization of regions. This model is based on the principles of "smart specialization", in which each region is assigned a special role in the functioning of the state. The proposed model is called by the authors "spatially binding economic federalism» because it provides for the regulation of federalism relations along the horizontal state structure and allows increasing the spatial connectivity of regions. Thus, the proposed model of federalism is based on a differentiated approach to territories within a single federal state and makes it possible to overcome the significant disintegration of the country's economic space.
Advantages and economic efficiency of cultivation of pea varieties of morphotype chameleon
Authors: Zelenov A N , Zadorin A M , Zelenov A A
Published: March 2021

Pea morphotype with layered heterophyllia chameleon has a high potential for seed productivity. Developed at Federal Scientific Center of Legumes and Groat Crops (FNTs ZBK ) the best varieties-chameleons at the average for 3 years (2017-2019) at yield 0.44 t/ha surpassed standard leafletless varieties by 0.54 t/ha. Moreover, they contained 1.2% more protein in the seeds. Chameleon varieties fully realize their potential with a yield of more than 3.0 t/ha. The data of the state test of the Spartak variety shows that, despite the additional production costs, the profitability of cultivation of this variety and net income increase with an increase in yield, and the cost of seeds decreases.
Light environment and plant growth in plant factories
Authors: Lu N
Published: March 2021

A plant factory with artificial light is an effective system producing food to satisfy specific demands on yield, morphology, taste and nutrient accumulation in plants. All environmental factors inside a plant factory can be controlled without climate and location limitation. Light is one of the most important factors affecting plant growth and quality. By regulating light aspects, such as light intensity, light period, light quality, lighting position, and daily light integral, the growth and quality of the plants grown in a plant factory can be largely enhanced. As known, the initial and operating cost for a plant factory with artificial light is high, particularly the cost of electrical energy related to lighting. Identifying the optimal light environment that promotes plant growth and quality is critical for commercialization of plant factories. Recent researches have paid great attentions to the effects of light environment on the growth and morphology of leafy vegetables. On the other hand, the demand on functional plants that contain high concentration of bioactive compounds is increasing rapidly. Bioactive compounds in plants have been intensively studied to evaluate their effects on human health and many of them are proved to be clinically active against various types of diseases (e.g. anti-cancer effects). More and more people prefer to take health product derived from natural plants for disease prevention. Solutions to realize sustainable production of high quality functional/medicinal plants can be provided by developing environmental control technologies, such as light recipe, in plant factories. Aromatic herbs such as coriander; medicinal plants such as perilla and water spinach are subjected to different light conditions and root zone environments. Some bioactive compounds e.g. perillaldehyde and rosmarinic acid in perilla leaves; phenolic compounds and flavonoids, especially rutin and chlorogenic acid in coriander can be enhanced. The effects of each light aspect on plant growth vary with plant species and other environmental conditions, however, there are also some general trends that can be used to guide commercial application. This presentation introduces the basic of light and its effects on plant growth in plant factories, demonstrates research results that have been published in scientific journals, reports the current study on herbs and medicinal plants, and summarizes the general application of light in plant production.
Strategy formulation for increasing customer satisfaction based on service quality gap: a case study of branding coffee shop in Yogyakarta
Authors: Ginting N V , Widodo K H , Purwadi D
Published: March 2021

The research on the quality of service on the coffee shop is currently interesting to be researched to measure the expectations and perceptions of consumers coffee shop, as well as gap between the two in the dimensions of quality services. This can be a standard of service quality that can be felt directly by consumers in each class compared to competitors, so that consumers are loyal and provide recommendations to the environment and its social classes. This research is quantitative research, with a questionnaire measuring instrument, with gap analysis and important performance index for formulating the strategy. This research was done by using Questioner to get primary data. This primary data was collected through 100 respondents. The purpose of this paper is (1) identifying customer service based on Serv-qual technique, (2) analyzing the gap between quality service expectations and perception, (3) strategy formulation for increasing customer satisfaction.
Assessing the vulnerability of Gayo coffee households towards floods and landslides in Central Aceh-Indonesia
Authors: Azzahra S , Hamid A H , Nugroho A , Zulkarnain  , Wahyuni W
Published: March 2021

This study aims to analyze the vulnerability of Gayo highland smallholder coffee farmers in Indonesia. On the one hand, this region produced premium quality arabica coffees, but on the other hand, it is prone to flooding and landslides. This study employs household survey data of 34 affected coffee farmers collected in 2020. A Livelihood Vulnerability Index (LVI) approach was employed to evaluate the vulnerability to floods and landslide impacts using different indicators along with three major components i.e. sensitivity, exposure, and adaptive capacity. The results showed that the livelihoods of Gayo coffee farmers are vulnerable to floods and landslides impacts and necessarily need efforts to improve their adaptive capacity.
Stakeholder analysis for controlling land utilization in Parangtritis sand dunes
Authors: Ningrum E R , Laili A , Yasiroh I I , Wardani W T K , Al Tumus M G R , Amri I , Aditya B , Putri R F
Published: March 2021

Land use change in coastal sand dune is a problematic issue that can arise due to inappropriate use. Stakeholders have a large role in the management of sand dune. This study aims to identify and map the role of stakeholders in relation to land utilization in Parangtritis sand dunes. Land use distribution was analyzed using ArcGIS software, while the method used for stakeholder analysis was in-depth interviews. The stakeholders in this study are the Spatial Planning Agency of Bantul Regency (DPTR), the Environmental Agency of Bantul Regency (DLH), Parangtritis Geomaritime Science Park (PGSP), Tourism Awareness Group (Pokdarwis), Save Our Sand Dune Lives (SOSDL), village government, and the local community. The result indicated that many anthropogenic activities were identified on the sand dune area, which in turn can endanger the existence of this landform. Based on the results of the analysis, it shows that the stakeholders included in the role of the main players (key players) are DPTR, DLH, PGSP, Pokdarwis, and SOSDL. Meanwhile, stakeholders included in the subject category are the village government and the local community. There is no communication forum for management, supervision, and control of the sand dune conservation area, as well as integration between stakeholders.
Accuracy assessment of relative and absolute water column correction methods for benthic habitat mapping in Parang Island
Authors: Hadi A A , Wicaksono P
Published: March 2021

The condition of benthic habitats in optically shallow sea waters becomes important information in the inventory and processing of coastal resources. Remote sensing is effective and efficient in mapping benthic habitats. This study aims to apply absolute and relative water column correction methods in order to map benthic habitats on Parang Island using PlanetScope image. The benthic habitat classification scheme used consists of coral reefs, seagrass, macroalgae, and substrate. We compared the accuracy of benthic habitat map based on absolute and relative water column correction methods. The classification methods used are the Maximum Likelihood (ML) algorithm and Support Vector Machine (SVM). The results showed that benthic habitat map with the highest accuracy was obtained by a combination of Lyzenga-ML at 61.63% followed by Purkis-SVM at 59.18%, Lyzenga-SVM at 41.90%, and Purkis-ML 16.87%. The results show that the Lyzenga water column correction method is the best choice in mapping benthic habitats.
Estimation of erosion using Soil and Water Assessment Tool (SWAT) model in Samin Sub-watershed, Karanganyar and Sukoharjo Districts, Jawa Tengah
Authors: Syahdiba H N , Kusumandari A
Published: March 2021

Over the past 10 years (2005-2015) there has been an increase in settlement land use in the Samin Sub-watershed, with an average of 26.8 ha/year [1]. Land in the study area is also widely used as plantations and agriculture without regard to soil conditions that are easily eroded and prone to landslides. Inappropriate land use has caused river siltation problems downstream and flooding. The purpose of this study is to determine the erosion rate of the Samin Sub-watershed predicted using the Soil and Water Assessment Tool (SWAT) model, test the suitability of the model in predicting erosion, and create scenarios for the application of Soil and Water Conservation in the form of terraces to reduce erosion level. The results indicated that the average erosion rate in the Samin Sub-watershed is 57.4 tons/ha/year. The highest erosion value is in dry land use. The three criteria for the Erosion Hazard Level (TBE) that predominate are the medium, light, and very light classes. Model suitability testing is carried out in 2 stages, namely calibration and validation. The calibration process obtained the value of R2 0.77 and NSE 0.23. The validation process resulted the value of R2 20.57 and NSE 0.40. The scenario of the application of Soil and Water Conservation technique in the form of a terrace will reduce erosion in the Samin Sub-watershed up to very light erosion hazard grade reaching 53%.
Optimizing antioxidant properties of salam (Syzygium polyanthum) leaf extract through nanoencapsulation technology
Authors: ’Afifah A N , Dono N D , Zuprizal
Published: March 2021

Nanoencapsulation preparation was carried out to optimize the antioxidant properties of salam leaf extract (Syzygium polyanthum). The ionic gelation method was used in the process of making nanoencapsulation with chitosan and Sodium Trypolypospat (STPP) as a coating material. The parameters observed included the antioxidant activity of salam leaf extract and the characteristics of the nanoencapsulation of salam leaf extract. NSLE characterization was measured, such as particle size, zeta potential (using Particle Size Analyzer), and nanoparticle morphology (using Transmission Electron Microscopy). Descriptive analysis was used to discuss the results obtained which are equipped with tables and figures. The results showed that the optimum formulation of NSLE was the ratio of extract nanoencapsulation: chitosan: STPP was 1: 4: 1/90. The antioxidant activity of the salam leaf extract was 68.55%, then the measured NSLE particle size was 478.3 nm with a Polydispersity Index (PI) of 0.52 and a measured zeta potential value of + 42.3 mV. NSLE particle morphology looks round with a rough surface. Characterization of NSLE has the potential to protect bioactive compounds so that they can optimize the performance of antioxidant activity.
Effect of yellow sweet potato extract (Ipomoea batatas L.) as a prebiotic source for the kinetics of fermentation and the production of lactic acid by Lactobacillus paracasei
Authors: Barus W L , Bachruddin Z , Hanim C , Yusiati L M
Published: March 2021

This study aims to determine the effect of yellow sweet potato extract as a prebiotic source for fermentation kinetics L. paracasei. Bacteria L. paracasei, which is used here, is a collection of Laboratory Nutritional Biochemistry, Faculty of Animal Science UGM. Concentrations of yellow sweet potato extract used to determine the Km value L. paracasei were 0.01, 0.05, 0.1, and 0.2%. Lactic acid production and fermentation pH value of L. paracasei with different levels of yellow sweet potato extract (2 Km, Km, 1.5 Km) were measured after 24 hours incubation period. Km value bacteria L. paracasei obtained 2.1 g/100ml. Different concentrations of yellow sweet potato (2 Km, Km, 1.5 Km) as a treatment had a significant effect (P<0.05) on the increase in lactic acid produced and decrease in pH. Based on this experiment, it can be seen that level substrate with Km value have not produced optimal lactic acid.
Effect of purple sweet potato levels (Ipomoea batatas L.) carbohydrate sources on fermentation kinetics and lactic acid production by Lactobacillus paracasei
Authors: Tasminto D , Bachruddin Z , Kurniawati A , Muhlisin
Published: March 2021

This research aims to determine the effect of purple sweet potato extract level as a carbohydrate source substrate on the kinetics of fermentation and lactic acid production by Lactobacillus paracasei. Research using L. paracasei, which is a lactic acid bacteria (LAB) collection of the Laboratory of Nutrition Biochemistry of the Faculty of Animal Sciences UGM. Fermentation kinetics were observed with a graph of substrate degradation derived from the Michaelis-Menten equation. Purple sweet potato extract concentration (S) used to determine the value of Km and qmax of L. paracasei was 0,01; 0,05 and 0,1%. Purple sweet potato extract concentration (S), which was used for observing the kinetics fermentation and lactic acid production, was ½ Km, Km and 1,5 Km. Observation of substrate degradation was known by conducting the Antrone test. The results of the fermentation kinetics test in the form of slope values, as a parameter of the speed of substrate degradation L. paracasei. Lactic acid production was measured using the Barker and Summerson methods. Analysis data for the value of Km and qmax observed descriptively. While, the data of the fermentation kinetics test, pH values and production of lactic acid were analyzed using analysis of variance with a Completely Randomized Design (CRD) in a unidirectional pattern. The addition of purple sweet potato extract to liquid fermentation L. paracasei grading 1,5 Km (3 g/100ml) has shown the optimum pH value and lactic acid production but ½ Km concentration shows higher substrate efficiency.
Ullage level monitoring model using sensors inside and outside the system in the fino-style winemaking aging process
Authors: Pambudi S A L , Hujja R M
Published: March 2021

Manual control of wine production possibly can be ineffective, considering in a winery there could be more than one parameter quality control with many tanks or barrels produced at the same time. In the aging process of Fino-style winemaking, the ullage must be maintained at a constant level. Considering the existing barrels and tanks, space is needed to place the sensor to collect data with the best result possible. In the case of sensor placement inside the system, an ultrasonic sensor is used by acquiring the time data needed to receive the signal emitted from the sensor. Whereas in the case of sensor placement outside the system, a microphone is being used to acquire sound frequency data generated from hitting wine cask with solenoids in a sample time of 100ms. Based on the latest research, the two sensors can be used to acquire ullage data from casks. However, for long-term use of an ullage monitoring system, it is recommended to use the inside one, although it is more expensive, the simple working principle and easier maintenance making it unlikely to hire experts only for dealing with the sensor nodes.
Occurrence of gastrointestinal parasites in cattle in Indonesia
Authors: Nurcahyo R W , Ekawasti F , Haryuningtyas D , Wardhana A H , Firdausy L W , Priyowidodo D , Prastowo J
Published: March 2021

Gastrointestinal nematode parasites play an important role in cattle farming in Indonesia. The majority of parasite infection cases cause weight loss and decreases in appetite, productivity, milk production and farmers’ economic income. This study aimed at finding out the incidence of gastrointestinal nematode parasite disease in cattle at several regions in Indonesia. It was conducted in the period of March 6th to October 2020. There were totally 335 samples randomly drawn from various regions in 15 provinces of 34 provinces in Indonesia. Stool was examined using Whitlock and flotation methods. The results showed that the prevalence of gastrointestinal nematodes Strongyle, Trichuris sp., Capillaria sp., and Ascaris sp. amounted to 24.2%. The highest prevalence of the Strongyle nematodes was found in West Nusa Tenggara (52%), Central Kalimantan (50.8%) and Southeast Sulawesi (40%). The prevalence of the Trichuris sp. in East Java was 15%, while it was 10% in Central Kalimantan. The prevalence of the Capillaria sp. in North Kalimantan was 21.1%, in West Sumatra 18.8% and in East Java 6.7%. The prevalence of the Ascaris sp. worms in East Java was 16.7%. The results of the characterization based on age, sex and cattle management showed that 4.6% of the Strongyle worms were found in bulls, 2.74% in females, 4.38% in intensive maintenance and 2.47% in semi-intensive maintenance, while 5.48% of the worms were found in adult cattle and 1.37% in young cattle. The same pattern was observed in Trichuris sp., Capillaria sp. and Ascarids sp. infections. The results indicated the need for the eradication of the gastrointestinal nematodes through deworming and good management system.
The effect of annealing temperature on the recrystallization and mechanical properties of severe plastic deformed commercial pure aluminium during ultra-fast annealing
Authors: Zhao Yanjun , Li Liuyang , Lu Zepeng , Teng Guanqi , Liu Shaochen , Hu Zhiliu , He Aoping
Published: March 2021

In the research a commercial pure aluminium was cold rolled by 98% accumulative severe plastic deformation and then ultra-fast annealed at 350 °C−520 °C with the 1000 °C/s heating rate and 1.0 s holding time. The microstructure evolution and the mechanisms of the recovery and recrystallization for the above ultra-fast annealed pure aluminium were analyzed by Gleeble 3500 thermal simulation system, electron backscatter diffraction(EBSD),and transmission electron microscopy (TEM). For the ultra-fast annealing pure aluminum, the grain size increases from 2.05 μm to 17.10 μm with the increase of annealing temperature from 410 °C to 520 °C; the tensile strength of the annealed pure aluminium decreases from 116.48 MPa to 53.43 MPa, and the uniform elongation increases from 1.20% to 39.78%. When annealing at 410 °C, the storage energy was transformed into the driving force for grain nucleation, which greatly refined the grains. When annealing at 380 °C ∼ 410 °C, the pure aluminium is in the stage of recrystallization, and the average grain size refined to 2.05 μm. When annealing at 435 °C, the number of small-angle grain boundaries (<15°) was significantly reduced and the number of large-angle grain boundaries increased. When the annealing temperature increased to 470 °C or 520 °C, the crystalline grains had merged each other, leading to the grain size grow to 17.10 μm. The annealing temperature of ultra-fast annealing should be in the range of 410 °C to 435 °C for optimizing the mechanical performances of commercial pure aluminum.