bluuebunny/crossref_metadata_2025_split huggingface dataset:
Soil organic matter in various land uses and management, and its accuracy measurement using near infrared technology
Authors: Kusumo B H , Purwanto A , Idris H , Sukartono S , Susilowati L E , Bustan B 
Published: May 2020

Abstract
The aim of this study is to investigate the soil organic matter (SOM) status in various land uses and management in Kayangan Sub-District, North Lombok, and its accuracy measurement using near infrared spectroscopy (NIRS). A total of 100 soil samples (0-10 cm depth) were collected from several land uses and management (rain-fed areas, irrigated areas, areas planted 1-3 times with seasonal crops, areas planted with 1-3 perennial plants) in the study area, which were dried, ground and sieved, then analyzed using Walkley and Black method and scanned using near infrared spectroscopy (NIRS). Partial least square regression (PLSR) was used to create SOM prediction models. The results showed that the SOM content varied from very low to moderate with most of them were low. The content of SOM was significantly higher in the irrigated areas compared to that of in the rain-fed areas, and also higher in the areas planted with seasonal crops 3 times a year compared to the areas planted 1-2 times a year. SOM content was higher in areas planted with 2-3 types of perennial plants, compared to with 1 type of perennial plant. NIRS technology was moderately accurate in measuring SOM, which can be used to monitor spatially changes in SOM.
Spatial analysis of tourist dispersal and mobility for tourism destination planning and development: A case study of great ocean road region, Australia
Authors: Novianti S , Fauzi C , Suhartanto D 
Published: May 2020

AbstractMany studies encourage tourist destinations to consider dispersal and mobility as key strategic components of tourism planning and development. Essential aspects such as the visited destinations and the arrival as well as exit directions become a basis for formulating a tourism planning policy. However, research in examining this paradigm by using a spatial analysis is limited. Therefore, this paper introduces an analysis by using Geographic Information Systems (GIS) to create a visualization of tourist dispersal and mobility. This methodology was implemented in the Great Ocean Road Region, an iconic regional destination in Australia that is experiencing limited tourist dispersal. Results from 351 questionnaires were processed by GIS with a web-based application. The data were processed by using certain tools, including ArcGIS ESRI to create spatial data as well as PHP and JavaScript programming languages to visualize the results. The results show that there is a low geographical dispersal in the region because the hinterland area remains untapped while the coastal area receives abundant of tourists. It is aggravated by limited tourist mobility due to the same directions of tourists’ arrival and exit. With GIS technology, the visualization of this spatial analysis shows a possible tourism pressure that is worth noted by policymakers in the planning and development process.
Evaluating the availability of facilities in the elderly park in terms of environmental sustainability
Authors: Akliyah L S , Solihin F D M 
Published: May 2020

Abstract
Bandung City has many thematic parks spread across several districts. One of them is Taman Lansia (Elderly Garden). Although according to Bandung City Government that parks are intended for all age groups, there should be a target for visitors based on different age groups in each park based on the theme. The elderly has physical and psychological limitations that cause the elderly age have special needs that are different from the productive and pre-productive age communities, so special facilities are needed for the elderly in Bandung. Based on observation, existing facilities in Taman Lansia had not been able to cover the elderly needs. So that, the purpose of the study was identifying visitor characteristics and analyzing the facilities needed at Taman Lansia according to the elderly characteristics. The data collection methods were getting observation and interviews. The variables must fulfill criteria for facility that the elderly needs, such as accessibility, security, and convenience. The analysis methods were descriptive analysis. This study indicated that Taman Lansia visitors were dominated by elderly residents. There were several types of facilities that have not been provided in accordance with the characteristics of the elderly such as ramp handrails. The available facilities did not consider the characteristics and needs of the elderly.
Intelligent decision support systems for determining tour bus route with time windows: A metaheuristic approach
Authors: Hudzaifah H , Rizana A F , Ramadhan F , Imran A 
Published: May 2020

Abstract
The transportation routing problem is a very popular field in operations research and management science area. Many previous researches are still continuing to develop model and algorithm to produce the best transportation route optimization in various research objects. Technology has enabled the development of the intelligent decision support system (I-DSS) to optimize transportation route. Although technology has evolved, there are still few researches that build I-DSS software to minimize transportation distance and fuel consumption, especially using the metaheuristic approach. Thus, this paper aims to develop I-DSS software to minimize fuel consumption and travel distance by considering time-windows constraint using metaheuristic approach. The software can receive input dynamically to evaluate and select the best transportation route. The results of this software have been tested using real historical data from one of tour and travel company in Indonesia. The company provides travel services using a bus to visit several tourist attractions based on the opening hours of the destinations. I-DSS software output shows that the travel distance is 25.64% more efficient than the current real conditions. In addition, the fuel consumption produced by I-DSS is better than the actual conditions, which is 17.35% more efficient.
Modelling customer loyalty using partial least square: An empirical evidence from online food industry
Authors: Suhartanto D , Leo G , Setiawati L , Purwaningsih S S 
Published: May 2020

AbstractThe online food delivery service industry has emerged as huge and prospective industry. In this competitive business environment, having and developing loyal customer are essential; yet, research to examine customer loyalty modelling in this industry is limited. This study is designed to assess the applicability of Partial Least Square Modelling to assess the customer loyalty toward online food delivery service. This study uses a survey of 405 online food service customers collected from greater Bandung region. The model, including four quality system predictors (efficiency, fulfilment, availability, and privacy), was examined using SmartPLS software. The results show that the model of loyalty toward online food has an acceptable Goodness of Fit Index. Further, the R2 of the customer loyalty in the model is 0.67. These results indicate that the method applied is suitable for modelling customer loyalty. This study offers an empirical evidence on the applicability of Partial Least Square to model the customer loyalty toward online food delivery service. This result extends the existing methodological and managerial practices to develop loyalty in the online food industry.
Redesigning the packaging of batik fabric products using kansei engineering method (Case study: Rumah Batik Komar)
Authors: Mulyati D S , Silvana R D , Aviasti A , Oemar H 
Published: May 2020

Abstract
Packaging is an important part of a product. Rumah Batik Komar, which produces batik and creates batik tourism will improve their product package so that the new packaging designs will be made at a lower cost but still provide good quality. The purpose of this study is to minimize packaging costs by designing new packaging based on the respondents’ wishes while maintaining the quality of the packaging that will be redesigned. The method used is Kansei Engineering, which is a method that defines consumer desires based on the image through Kansei Words into product design. The Conjoint Analysis is used to determine the value of the relationship between the element design and Kansei Words. The result shows that the desired packaging by the customer is black, rectangular and made of paper. From the calculation results there are 12 kansei words that represent the image of the respondent’s wishes including made of paper, attractive-coloured, using ribbons, reusable, recyclable, saving space, instagrammable, attractive, luxurious, easy to carry, having logos and hard textured.
Pineapple peel industry determination with weighted location method
Authors: Nu’man A H , Nurwandi L , Bahtiar I , Omar S 
Published: May 2020

Abstract
This study discusses alternative fuels to replace gasoline with bioethanol. Bioethanol can be produced including pineapple, where the peel can be used to be converted into bioethanol instead of gasoline. The use of pineapple peel for small-scale production in this study was the main focus, so that the community would get benefit from the economic value. The community to use pineapple peel is the main concern, to get information about the capacity of an area. Measurement of capacity is carried out by taking into account transportation, raw material, land, energy, labour, waste, and market factors. The assessment was carried out on five zones of pineapple farming using analytical hierarchy process (AHP). Each area is determined by its coordinates, then multiplied by the weight of each region produced. The calculation results show that the determination of area was chosen to be a small-scale bioethanol production area concerning with dependent on the policy, raw materials, and transportation factor, it show that policy factor must be exist to support the operation of bioethanol industry with pineapple peels material.
Entrepreneurship capability in industrial engineering and its effect on competitiveness
Authors: Dzikron M , Djamlaudin D , Orgianus Y , Oemar H 
Published: May 2020

Abstract
Entrepreneurship and competitiveness are interesting topics in regional economic development. The study aims to examine the effect of entrepreneurship on competitiveness in the leather industry. The study was applied to the leather tanning industry in Indonesia. The research method is based on a survey of 42 leather tanning companies, data analysis using the Partial Least Square. The research findings the effect of Entrepreneurship on Competitiveness has a low correlation. The cause of the low level of Entrepreneurship in SMIs is mainly in achievement motivation, leadership and business orientation factors. Therefore it is suggested to employers and the government to encourage entrepreneurial skills through entrepreneurship education, facilitation of capital and marketing and building partnerships in the leather industry.
Young people activities in the responsibility of environmental sustainability: Indonesian perspective
Authors: Anwar A , Achiraeniwati E , Djaohari A H N 
Published: May 2020

Abstract
Sustainability is the process of maintaining change in a balanced fashion, in which the exploitation of resources, the direction of investments, the orientation of technological development and institutional change are all in harmony and enhance both current and future potential to meet human needs and aspirations. So it is necessary to think of a way so that everyone is able to maintain environmental sustainability, so that there is no exploitation of natural resources that will affect the next generation. The young generation who will be the success or needs to be involved in the sustainability of this environment. Based on this, it is necessary to conduct a study to find out the extent of the responsibility of the younger generation towards environmental sustainability in their country. Primary data collection is done by means of interviews and field observations on students on selected campuses in Indonesia. While secondary data collection is done by literary studies. Specifically the study will focus on the following objectives: to examine the level of responsiveness of millennial and post-millennial generation on social, environmental and economic sustainability; and to identify the opportunities and challenges in cultivating responsiveness on sustainability among millennial and post-millennial generations.
The effects of carbon tax on inventory and land multimodal integration
Authors: Ardliana T , Pujawan I N , Siswanto N 
Published: May 2020

Abstract
Climate change has contributed in extreme weather events recently due to the effect of global warming. One of the main factors is the carbon emissions that have exceeded the permitted limits. Many countries in the world have taken some significant actions by making some commitments to reduce the effect of it. One of the commitments is to give a penalty cost of each unit emissions produced by a country or a company. In this study, we developed an integration model between inventory and multimodal land transportation by focusing on the costs of emissions produced. To distribute products from several suppliers to several customers, we proposed train as long distance transportation mode and truck as short distance transportation mode. The purpose of this study is to find the best solution for total system costs which consists of operational and emissions costs. The numerical experiments show that the carbon tax rate affects the amount of carbon emissions and the total cost. The trade-off between emissions and the costs will produce an optimal solution. The method used in finding the optimal condition is Mixed Integer Linear Programming.
Measurement of quality services in the laboratory
Authors: Nugraha N , Mulyati D S , Bachtiar I , Nursagita C 
Published: May 2020

Abstract
The problem in this study is complaints about the quality of laboratory services in the Faculty of Engineering which were delivered by students through a pre-research questioner. This problem needs to be corrected by measuring the quality of laboratory services so that it can increase satisfaction from students. The purpose of this research is to find out student satisfaction with the quality of services in the Faculty of Engineering laboratory. The method used in this study is the Service Quality (SERVQUAL). The results of the research obtained using the SERVQUAL model, the lowest values for each dimension were obtained. Tangible; laboratory room are clean, comfortable and spacious in accordance the standard national laboratory. Empathy; Assistants the Laboratory gives attention and prioritizes. Responsiveness; Assistants provide services quickly and precisely. Reliability; The assessment process is an objective and transparant. The Assurance; Assistant has the ability to answer all practical questions. The conclusion of the research that The priority to improve service quality the dimensions of tangible; laboratory room are clean, comfortable and spacious in accordance the standard national laboratory.
The utilization of local bamboo based materials for innovation of playing and creating media in children age of preschool
Authors: Purwanto P 
Published: May 2020

Abstract
Play is one of the right stimulations for children to stimulate thinking power, to empower emotional, social, and physical aspects. There are several types of games that shape the skills and creativity of children, one of which is a game of compiling puzzles, because playing puzzles can coordinate the movements of the eyes and hands of children or fingers movements, with it without them knowing that the fine motoric skills of the child continue to be trained and developing. This paper was on addressing the problems encountered in the Amongsiwi playgroup, Panggungharjo village, Bantul, namely the lack of availability of play and creative media. The purpose of the paper is on method to create a play and creative media innovation from local materials in the form of puzzle Cendani bamboo that is feasible, safe, and environmentally friendly for preschoolers. The research was conducted by collecting data, observing and analyzing problems, product design and product testing (testing on children). The results of the study indicate that the design of play and creative media can be accepted by children with a feasibility level of 78 %. The level of ability of children to use or to compile a puzzle to form a shape based on observations was 76 % of 22 children can already be in the form of tangible shapes such as animals, cars or robots.
Implementation supply chain management concept in the industrial symbiosis of the fragrant lemongrass distillation
Authors: Aviasti A , Amaranti R , Nugraha N 
Published: May 2020

AbstractThe citronella oil refining industry contributes greatly to improving the community’s economy. In the supply chain of citronella oil, the community usually acts as a supplier (fragrant lemongrass farmers), manufacturers (distillers of citronella oil), and distributors (collectors of citronella oil). The main problem in the citronella oil refining industry is the uncertainty of the supply chain. Fragrant lemongrass supply chain mapping is done to determine the capacity and needs of all actors involved from raw material sources to retail consumers. Thus, the continuity of fragrant lemongrass supplies increased production capacity in refineries, and market potential can be estimated more precisely. On the other hand, integration between industries is needed to prevent the impact of environmental damage while increasing profits. The symbiosis model of the citronella refining industry is expected to optimize the potential and existing resources through an industrial system that is efficient, integrated, easy to implement, and environmentally sound. This paper will discuss how the application of supply chain management concepts in the symbiosis of the citronella refining industry so that the objectives of cooperation in the environmentally sound supply chain can be realized.
Synthesis and characterization of chitosan-bentonite modified polyurethane with biomedical potential
Authors: Rihayat T , Suryani S , Riskina S , Nurhanifa N 
Published: May 2020

Abstract
Research on the manufacture of polyurethane with chitosan and bentonite fillers modified with CTAB into montmorillonite (MMT) which will be applied to medical devices. The raw polyurethane from castor oil and diisocyanate is in the form of Toluene Diisocyanate (TDI). The addition of chitosan to castor oil polyurethane functions as an anti-bacterial agent. Pure polyurethane still has a deficiency of high temperatures and therefore added MMT which functions as a heat-retaining agent. The bacteria used are E. coli bacteria and Staphylococcus Aureus bacteria. The results showed a polyurethane that can withstand high temperatures is PU-MMT-CS 6%. The best anti-bacterial properties were obtained in polyurethane containing chitosan with higher concentrations (PU-MMT-CS 6%)
Investigation of reducing electricity consumption in the refrigerator by using domestic refrigerant MC-22
Authors: Mutaufiq M , Berman E T , Sumardi K , Wiyono A , Gandidi I M 
Published: May 2020

Abstract
A household refrigerator was machine that operates continuously throughout the day to keep food fresh. So that a little savings in electricity consumption was very beneficial. The purpose of this study was to obtain savings in refrigerator electricity consumption by replacing R-134a working fluid with Musicool-22 (MC-22) as natural refrigerant. Furthermore, to reducing global warming potential of the earth’s surface due to HFCs refrigerants. The study was designed experimentally with the retrofit refrigerant drop in substitute method on refrigerator. The test was started by measuring the performance of refrigerators using R-134a working fluid. Then the working fluid R-134a was retrofitted with MC-22 with a mass of 15%, 20%, 25%, 35%, 45%, and 65% of the mass of R-134a. Finally, the performance of the refrigerator that has been retrofitted using the MC-22 was measured as a measurement of the performance of the refrigerator using the R-134a. The test results showed that, when the refrigerator was retrofitted using MC-22 with a mass of refrigerant 25% mass of R-134a refrigerant, the performance of the refrigerator increases. Electricity consumption was more efficient with a marked decrease in electrical power requirements to 12.2%. In addition, the freezer room temperature is lower at 6.9 °C compared to when operating with R-134a working fluid.
Numerical study on the symmetric and asymmetric orientation of the crack branching in 2D plate
Authors: Dahlan H , Rusli M , As’ad A , Bur M 
Published: May 2020

Abstract
The phenomenon of crack branching is one of the typical fracture behaviours. The effect of crack branching orientation is investigated in this paper. By considering a static branched crack in a 2D plate under uniaxial traction, the numerical study is carried out for two study cases. The first study case is the symmetric crack branching in which the various crack branching length and orientation have the same value between both crack branching. The second case is the asymmetric case crack branching. In this case, both crack branching length has a particular constant value, Moreover, the orientation of first crack branching is constant and then the second one has various values. The stress intensity factors of the crack tips are calculated for both study cases. It is revealed for the symmetric case; the increasing of the crack branching length will increase the value of stress intensity factors KI for various orientations of crack branching. In contrast, the stress intensity factors KI will tend to decrease along with the increasing of the crack branching orientation. Moreover, the stress intensity factors KI of first crack branching will increase, but the stress intensity factors KI of second crack branching will decrease along with increasing of the second orientation crack branching for the asymmetric case. Furthermore, the direction the stress intensity factors KII will prone to change along with the increasing of the crack branching orientation. The stress intensity factor KII tends to increase along with the increasing of the crack branching orientation as well as the increasing of the crack branching length for the symmetric case. And then the increase of constant angle of first crack branching will increase significantly the stress intensity factors KII of the first crack tip along with the increasing of the second crack branching angle for the asymmetric case.
Evaluating and optimizing performance of shell and tube heat exchanger using excel-solver
Authors: Sujono S , Dewi A K , Soegiarto T S 
Published: May 2020

Abstract
Heat exchangers in the oil and gas industry play an important role as heat exchangers. In this research, shell-and-tube heat exchanger was chosen because this type of heat exchanger is the most widely used in the industry in general and in the oil and gas industry in particular. This research was conducted to determine the performance of shell and tube type heat exchangers in terms of thermal and hydraulic. Data acquisition is done by observing in the field. So that the data processing and calculation results are obtained as follows: Fouling factor operation 0.02823 (hr.ft2.F/Btu) higher than design 0.00485 (hr.ft2.F/Btu), Shell side pressure drop of 19.73 psi has over the maximum permissible of 10 psi, so it is time for cleaning, tube side pressure drop of 1.47 psi is still under the maximum permissible of 10 psi the effectiveness of the operation is 57.47% less than design value of 68.73%, and the simulation using excel-solver on the dirt (operating) condition result is effectiveness can be increased to 79.93%, shell side and tube side pressure drop 6.2 psi and 9.98 psi, shell side and tube side velocity 0.98 ft/s and 9.5 ft/s respectively.