A Model and Its Performance of Evapotranspirative Irrigation Tested to Grow Water Lettuces

Riani Muharomah(Riani Muharomah ),Budi Indra Setiawan(Budi Indra Setiawan ),Tsugihiro Watanabe(Tsugihiro Watanabe ) 적정기술학회 2023 적정기술학회지(Journal of Appropriate Technology) Vol.9 No.1

Efficient use of irrigation water is crucial to face the uncertain trend of a declining water resource. Ensuring a supply of water that matches crop evapotranspiration (ETc) while optimizing soil moisture is challenging. This study aimed to come up with a model of an irrigation system that can supply water immediately to meet ETc without using electricity. To test the proposed water balance model a trial was established in water lettuces. The system consisted of 15 pots connected in serial using water pipes and hoses through the bottoms of the pots. The first pot was used as a water level controller and the last pot used as a drain water collector. Irrigation water would flow immediately to the pots that had water levels lower than the setting level. Testing carried out on rainy days resulted in considerably higher rainwater (99.8%) being utilized compared to the irrigation water (0.2%). For water lettuces, the yield was 258.9 g/m2, water use efficiency reached 95% while the economical and physical water productivity were 2.17 g/L and 2.28 g/L, respectively. The water level in the pots could be maintained within the expected range while the soil moisture maintained an unsaturated condition. Further tests however are still needed, which currently is underway.

Effect of Uneven Distribution of Broadband Internet Services in Developing Countries during Economic Recession

RIANI, Westi,HARYADI, Sigit Korea Distribution Science Association 2022 유통과학연구 Vol.20 No.10

Purpose: This study examines the economic and technical reasons for the uneven distribution of broadband internet services in Indonesia before and during the recession due to the C19 pandemic, and examines its effect on the country's economy. Research design, data and methodology: The research was designed by conducting an economic feasibility, which was verified through area observations and interviews with providers and their association, as well as the Regulator. Results: The results show that during the C19 pandemic, there has been an increase in the distribution of broadband internet services in Indonesia since there has been an increase in demand for cellular services and fixed services together. However, the increase in broadband internet service coverage is still not evenly distributed in the country and unable to boost the decline in Gross Domestic Product during the C19 pandemic. Conclusions: The increase in fixed broadband coverage by seventy percent is an indication for the state to make policies to encourage bundling techniques between operators with the aim of internet services being more evenly distributed throughout the country. Where, the influence of a more even distribution of broadband internet services in all countries is believed to be able to support the country's economy.

The Impact of Self-Efficacy and Job Crafting on Job Satisfaction of Gig Workers: An Empirical Study from Indonesia

Riani RACHMAWATI,Luthfianti ZAKIA,Safitri SAFITRI,Ayu LUPITA 한국유통과학회 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.3

This study investigates the job satisfaction of gig workers in Indonesia, particularly the online motorcycle taxi or ojek drivers, by looking at the influence of proactive behavior, self-efficacy, and job crafting as found in previous studies. Gig workers are classified as ‘independent contractors’ where some studies show that they achieve high job satisfaction through autonomy and flexibility. However, other studies show that all gig workers do not experience this condition. Location-based gig workers such as the online drivers are highly controlled by algorithm control and customer management, which makes their autonomy and flexibility questionable. The study is quantitative research by conducting a survey approach in seven main cities in Indonesia. Two hundred eighty online ojek drivers participated in this research by fulfilling questionnaires. The result shows that proactive behavior does not directly affect job satisfaction, but self-efficacy fully mediates the relationship. Job crafting has an insignificant influence on job satisfaction, and thus, this variable cannot mediate the relationship between job satisfaction and proactive behavior. The major finding of this study suggests that self-efficacy, which is their belief that they can overcome the challenges and achieve their goals, is very central to shaping job satisfaction of the online drivers.

Evaluation of the Capacity of Rural Communities in Indonesia to Improve the Economic Welfare

RIANI Westi,FADHILAH Alya Muthia,HARYADI Sigit 한국유통과학회 2022 The Journal of Industrial Distribution & Business( Vol.13 No.9

Purpose: This study evaluates the ability to improve the economic welfare of rural communities in Indonesia by using the inequality measures of the distribution of information between leaders and their people as a variable that weakens the capacity of increasing the welfare. Research Design, Data, and Methodology: The research designed by developing an instrument using data validity and reliability testing. Before, primary data collected through interviews, questionnaires, observation, and documentation on the selected respondents. Then, the research method used is mixed methods research, in which quantitative and qualitative methods combined. Result: The finding from this study is that there is an inequality measure in the form of a high gap between the score of information distribution obtained by the village government compared to the score of the community, which has led to the welfare of the village which is still at a moderate level and not ready to become a prosperous society. Conclusion: The weakness of the village community is related to two things, namely the behavior and knowledge of the community about the issues, so the implication is that there must be a strong effort from the central government to ensure that technology is more evenly distributed to all villagers.

Five clusters of flood management articles in Scopus from 2000 to 2019 using social network analysis

Rosy Riani Kusuma,Ida Widianingsih,Sinta Ningrum,Rita Myrna 한국과학학술지편집인협의회 2021 Science Editing Vol.8 No.1

Purpose This study aimed to analyze the bibliographic characteristics and content of articles on flood management published in journals indexed by Scopus written by researchers from throughout the world from 2000 to 2019. Methods We obtained data from the Scopus database on October 2, 2020. “Flood management” was used to search across several categories, including article title, abstract, and keywords, filtered by subject area (social science; environmental science; and business, management, and accounting). We only retrieved articles written in English. We conducted content analysis using the VOSviewer software and visualized the co-occurrence of keywords and bibliographic coupling of sources and countries. Results Following the study protocol, we found 984 articles on flood management over the past 20 years. Among the three subject areas, environmental science was the most productive field for publishing flood management articles. Flood control, flood management, and risk assessment were the top three most popular topics. Flood management publications were published in 266 journals. In total, 86 countries collaborated to produce research related to flood management. Natural Hazard Journal and Journal of Flood Risk Management were the most prominent journals. Institutions from Europe ominated the top 10 institutions with the most publications by affiliated researchers. Conclusion From a global perspective, flood management research in the past two decades has increased significantly. There were five major topic clusters, and European-published journals ominated publications. Thus, Asian institutions need to conduct more active research on this topic.

Perceptions on services in Ceará-Brazil luxury hotels registered on TripAdvisor

Perinotto André Riani Costa,Camarço Janaina Cavalcante Farias,Braga Solano De Souza,Gonçalves Marina Furtado 한국마케팅과학회 2023 마케팅과학연구 Vol.33 No.1

This study analyzes the perceptions of the tourists available on the TripAdvisor website regarding the services of luxury hotels in Ceará, these being characterized by having quality and comfort in its facilities, excellence in services and exclusive attention to the client. Among the 941 lodging facilities, this research analyzes the 16 luxury hotels installed in the coast of the state of Ceará. Netnography was used as a method of analysis, which verifies what is publicly available in online communities to identify and understand the needs and influences relevant to consumers. From the customers shared reviews on the TripAdvisor website about the selected luxury hotels the qualitative method was applied. The positive and negative points reported by the clients regarding each luxury hotel in Ceará were analyzed comparatively, associating ratings on a scale of 1-to-5. This study gathered 1511 user reviews available on the TripAdvisor. The attributes of the services provided by the lodging facilities, with emphasis on service, gastronomy and quality were presented with greater recurrence in the results of this study. Finally, it should be noted that few works that contemplate the luxury segment are conducted and published in journals in the area of tourism in Brazil.

Rejoinder: The forward search: Theory and data analysis

Anthony C. Atkinson,Marco Riani,Andrea Cerioli 한국통계학회 2010 Journal of the Korean Statistical Society Vol.39 No.2

Green Entrepreneurship: A Study for Developing Eco-Tourism in Indonesia

Rahmawati RAHMAWATI,Anastasia Riani SUPRAPTI,Sarah Rum Handayani PINTA,Putu SUDIRA 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5

This study aims to determine (1) the inhibiting factors and solutions in the development of eco-tourism, and (2) how green entrepreneurship can be used for eco-tourism development. The increasing issue of global warming is pushing awareness of environmental preservation. This condition changes the people’s paradigm in traveling from the concept of mass-tourism to the concept of eco-tourism. The development of eco-tourism has consequences for entrepreneurial activities which is known as green entrepreneurship. This study is applied research conducted in East Lombok, one of the regions in Indonesia. The sampling technique used is purposive sampling covering a total of 34 informants. Data collection methods are carried out through interviews, observation, and documentation studies. Based on the data analysis, the findings of this study show that (a) inhibiting factors of eco-tourism development are limitation of eco-tourism knowledge, lack of awareness in environmental preservation, and absence of supporting government policy; and (b) solution for eco-tourism development discovered in this research is divided into five factors i.e., condition, demand, related industry and support, strategy, government. Besides, for applying the green entrepreneurship model i.e., developing the spirit of green entrepreneurship, training in making products and services that are environmentally friendly is needed.

The forward search: Theory and data analysis

Anthony C. Atkinson,Marco Riani,Andrea Cerioli 한국통계학회 2010 Journal of the Korean Statistical Society Vol.39 No.2

The Forward Search is a powerful general method, incorporating flexible data-driven trimming, for the detection of outliers and unsuspected structure in data and so for building robust models. Starting from small subsets of data, observations that are close to the fitted model are added to the observations used in parameter estimation. As this subset grows we monitor parameter estimates, test statistics and measures of fit such as residuals. The paper surveys theoretical development in work on the Forward Search over the last decade. The main illustration is a regression example with 330 observations and 9 potential explanatory variables. Mention is also made of procedures for multivariate data, including clustering,time series analysis and fraud detection.

Apply Peers Tutors to Improve Mathematical Ability

( Hana Dianthika ),( Leli Kurniawati ),( Feny Riany ),( Nadya Muniroh ) 대구대학교 한국특수교육문제연구소 2018 한국특수교육문제연구소 학술대회발표자료집 Vol.2018 No.1

For some student’s mathematics is a fun lesson, some other students think if math is a less fun lesson. A class usually consists of students with heterogeneous ability, some students with more or less ability but the teaching services provided by teachers are more homogeneous. This can cause problems if students who have barriers in learning do not get educational services that match their learning needs. This study aims to formulate a learning program that can be applied by teachers to students with heterogeneous ability but more priority on students whose ability to understand lessons slower than their classmates. The method used in this study is a mixed method with exploratory sequential design, the result there are three students who have difficulty in following the learning of mathematics. The alignment program is organized by involving peers as a tutor for the three students. Based on the results of the study seen some students have increased understanding of the material delivered. Thus, applying peer tutors to students with math difficulty can help improve students' understanding.