Nurlaili Sudarwati, Slamet Supriyadi, Fahmi Arief Rahman
et al.
This study was conducted to evaluate the effect of chemical fertilizer coated with biochar on the growth of shallots (Allium ascalonicum L.) in sandy soil. The research was carried out at the Greenhouse of the Agroecotechnology Department, Faculty of Agriculture, Trunojoyo University of Madura, located in Telang Village, Kamal District, Bangkalan Regency, Madura, at an altitude of approximately 5 meters above sea level, from August to December 2023. A non-factorial Completely Randomized Design (CRD) was used, consisting of six treatments: P0 (control), P1 (recommended fertilizer), P2 (80% urea coated with rice husk biochar + bentonite), P3 (100% urea coated with rice husk biochar + bentonite), P4 (80% urea coated with corn cob biochar + bentonite), and P5 (100% urea coated with corn cob biochar + bentonite). The results showed that the application of biochar-coated urea fertilizer had no significant effect on plant growth and yield parameters such as plant height, number of leaves, number of tillers, number of tubers, tuber diameter, and root volume. However, plant height at 42 days after transplanting (DAT), the number of tillers at 42–63 DAT, and chlorophyll content showed significant differences among the treatments. Additionally, soil analysis parameters—including pH, organic carbon (C-organic), and soil nitrogen (N)—showed significant responses to the treatments.
Efficient harvesting of herbaceous mulberry is essential for reducing labor costs and ensuring high-quality stubble for rapid regrowth in sericulture production. However, existing mechanized harvesters rarely enable in situ measurement of cutting and conveying power under field conditions, and the influence of operational parameters on both energy consumption and stubble quality remains insufficiently quantified. In this study, a crawler-type prototype harvester equipped with three independently driven AC servo motors and real-time torque sensors was developed to monitor cutting, conveying, and baling processes. A Central Composite Design (CCD) combined with response surface methodology was employed to investigate the effects of forward speed, conveying speed, and average cutting speed on average cutting power per branch, average conveying power per branch, and stubble quality score. Field trials were conducted in Rizhao, Shandong Province, China, using the mulberry cultivar ‘Guishangyou 12’. The regression models exhibited high goodness of fit (R² = 0.9546∼0.9946) and non-significant lack of fit (p > 0.05). Results indicated that cutting power consumption was on average 3.7 times higher than conveying power, with cutting speed exerting the most significant influence on energy use (p < 0.01) and stubble quality (p < 0.01). The optimal parameter combination—forward speed of 0.55 m·s⁻¹, conveying speed of 0.96 m·s⁻¹, and cutting speed of 0.95 m·s⁻¹—reduced cutting power to 26.91 J·branch⁻¹, minimized conveying power to 6.64 J·branch⁻¹, and achieved a stubble quality score of 9.43. Validation experiments confirmed that deviations from predicted values were <5%. These findings provide a quantitative basis for operational optimization and energy efficiency improvement in herbaceous mulberry harvesting machinery.
Technological developments have encouraged the adoption of digital payment services in Indonesia, especially among women. This research aims to determine the influence of Overconfidence, Financial Literacy, Risk Tolerance, and Perceived Green Finance on Behavioral Intention in using digital payments. This research uses a quantitative approach with non-probability sampling and purposive sampling techniques. The total respondents were 384. Data were analyzed using the Partial Least Square - Structural Equation Modeling (PLS-SEM) method. The results show that Overconfidence and Financial Literacy have a positive and significant effect on Behavioral Intention, while Risk Tolerance and Perceived Green Finance have a positive but not significant effect. This finding indicates that women are more influenced by psychological factors and financial understanding when using digital payments than external factors such as risk or sustainability issues.
The article analyses the main trends related to migration issues in Ukraine and the EU caused by the military conflict. An analysis of the theoretical basis of the research was carried out in order to determine the main aspects related to the migratory behaviour of the population in the conditions of military conflicts and crisis situations. Based on the results of a sociological study, an assessment was made of the migration attitudes and expectations of internally displaced persons (IDPs) temporarily residing in the border region of the country under martial law. An attempt was made to assess the impact of migration potential on the development of border regions under the conditions of a military crisis (using the Zakarpattia Oblast as an example). The purpose of this article is to assess the attitudes and expectations of migrants in relation to the military conflict in their country of origin. The study focuses on internally displaced persons (IDPs) living temporarily in the country's border regions, particularly in Zakarpattia Oblast. Methodology. The study is based on a sociological survey of Ukrainian migrants, such as IDPs, in new places of temporary stay in the Transcarpathian region. The survey was conducted in the first half of 2022 using the method of sociological interviews according to a random sample. The structure of the sample is 70.5% – female and 29.5% – male respondents. In addition to the sociological survey, the research is based on statistical data analysis and review of literature studies using qualitative descriptive analysis. The results of the study show significant interdependencies, disparities and trends in migration expectations and attitudes in relation to crisis, which could be the basis for further prognosis and forecasting development in the field of migration theory, such as: gender disparities in migration due to military conflicts; the importance of family ties in migration and resettlement; the predominance of the remote form of work and education, which confirms its effectiveness in crisis situations; the high inclination and desire of IDPs to return home and the low activity of IDPs in migration abroad, which is one of the main differences distinguishing IDPs from other types of migrants.
Purpose: Coopetition is a relationship that arises both between independent companies and within complex organizations. It is seen as a success factor generating many benefits for the parties involved. However, at the same time, it is a risky relationship that does have its downsides. The purpose of this study it to identify the main dark sides that appear in coopetitive relationships between subsidiaries within business groups.
Design/methodology/approach: This study follows the quantitative approach. A computer-assisted diagnostic questionnaire survey was used and data were collected from 121 parent companies of large business groups listed on the Warsaw Stock Exchange.
Findings: The findings prove that coopetition at the intra-organizational level does not generate many negative effects. Those that appear are similar to the negative effects of inter-organizational coopetition. The most important three dark sides of intra-organizational coopetition are: loss of trust, conflicts, and asymmetry in benefits distribution.
Research limitations/implications: This study offers a more profound insight into intra-organizational coopetition and its dark side. However, it has some limitations which may indicate directions for further research. The limitations refer to the sample size and its origin as well as the adopted perspective of the parent company.
Originality/value: The value of the paper is to draw attention to the dark sides of intra-organizational coopetition. The study provided contribution to the literature on both coopetition and business groups as so far only a few studies have comprehensively dealt with the dark sides of coopetition, especially at the intra-organizational level.
З 19 по 20 травня у Київському національному університеті будівництва і архітектури проведено VII міжнародну науково-практичну конференцію «Transfer of Innovative Technologies 2021». На ній були представлені креативні ідеї, інноваційні проекти й практичні розробки в галузях будівництва, архітектури, розв’язання нагальних проблем інженерії й проектування об’єктів, захисту навколишнього середовища, сучасні тенденції в інформаційних технологіях та ін. На конференції, яка відбувалась в режимі відеоконференцзв’язку, прийняли участь вітчизняні науковці, викладачі та студенти навчальних закладів, представники виробництв, відомі фахівці країн світу. Усього подано 128 заявок від півтори сотні учасників, у тому числі 15 іноземних з Австралії, Польщі, Словаччини, США, Казахстану, Німеччини, Китаю.
Конкурсна комісія визначила кращі роботи в номінаціях: Презентація, Інноваційний проект, Публікація, відзначила Дипломами преможців 2021 року. Учасники отримали Сертифікати, а найактивніші − Подяки за проведену роботу, міжнародні наукові зв’язки та організаційну підтримку форуму. В Збірнику матеріалів конференції (онлайн) та в журналі «Transfer of Innovative Technologies», Vol.4, No.1 опубліковано препринт статті, а презентації учасників – на сайті конференції. Кращі роботи рекомендовано до публікації в міжнародних наукових журналах Transfer of Innovative Technologies, Підводні технології: промислова та цивільна інженерія. Прийнято рішення щодо підготовки й проведення наступного форуму в 2022 році, залучення до інноваційної діяльності креативних учасників та нових установ, подальшої інтеграції у світовий науковий простір. Оргкомітет дякує всім за представлені матеріали та впровадження інноваційних технологій у життя!
The aim of the article is to determine the impact of the COVID-19 pandemic on the level of housing rents using the example of the City of Krakow. This study is based on objective data on rental prices and subjective information obtained from real estate agents using a questionnaire survey. The research revealed that the first wave of the COVID-19 pandemic actually led to a 6-7% decrease in prices in the rental market in Krakow, while at the same time the surveyed real estate agents had estimated that rents would drop by about 13%. With the second wave of the pandemic, it is possible to see that its immediate impact, i.e. between the third and fourth quarter of 2020, has led to a further 6.25% drop in rents. It should be noted that the latter decrease was very accurately predicted, both by the survey respondents and by the econometric models used. Finally, the results of the analysis also indicated that the worsening of the pandemic in the last quarter of 2020 will have a significant impact on rent levels in Krakow for all of next year. Regardless of how the economy develops, rental prices are forecast to fall further in 2021q1. However, in the subsequent quarters of 2021, rents are projected to increase, but ultimately their level will not return to pre-pandemic values even in 2021q4. The latter is likely to happen only in the second half of 2022.
Demand-Side Generating Assets (DSGAs) relate to existing small diesel Gensets serving the critical loads of infrastructures in unexpected electrical network interruptions. This paper investigates the exploitation of DSGA as potential suppliers of ancillary services (AS), especially in the case of isolated or weak interconnected island power systems such as in Crete. In this regard, their impact on substations’ loading reductions and associated copper losses is presented, using a substation as a case study with a typical touristic load in Crete. DSGA’s impact on such a significant part of reliability enhancement in distribution systems is evaluated, examining different scenarios of DSGA installed capacity. Subsequently, extensive research is carried out regarding the cost analysis for their access to the electrical grid providing AS, in combination with their operating cost analysis. The calculations on fuel consumption cost show that DSGA are comparable with the most expensive gas turbines of the Cretan power system. Finally, considering the capital cost for their required configurations and their fuel consumption cost, a proposal for their remuneration prices is made. The prices that arise are lower than the actual remuneration prices of other similar services such as Genset rentals for the case of the Cretan power system.
Engineering machinery, tools, and implements, Technological innovations. Automation
The purpose of this paper is a comparison of chosen wind Energy sectors aspects in Visegrad Group countries, which is not found in the subject’ literature. Authors show basic concepts of Energy sector development management based on literature review. It has been indicated that there is no joint decisive voting action in EU of the ally, which consequently leads to lack of common, homogenous Energy policy and weakens a position of V4 as a whole, leaving each of the member individual and separated in their efforts to maintain sustainable Energy development. Authors perform a characteristics of a specified issues of Energy areas and share of wind Energy in it, basing on conducted research and analysis of statistical historical data in order to compare them. Moreover, areas of possible growth and development directions are shown, basing on geographical specification. The paper is constructed as follows: introduction, Energy sector development management issues, characteristics and comparison of Visegrad countries wind Energy, conclusions.
Essa pesquisa analisa a utilização de sistemas de gerenciamento de armazéns no Agronegócio do Distrito Federal, e sua relação com os Condomínios de Armazéns Rurais. Para tanto foi realizada uma pesquisa aplicada, descritiva e qualitativa, através de estudo de caso e entrevista semiestruturada, analisados por meio da análise de conteúdo. Os resultados evidenciam que o WMS é importante para o gerenciamento e controle do armazenamento agrícola, automatização dos processos, redução de erros, melhoria na resolução de problemas fiscais e inventário, e controle de quebras e descontos percentuais. Constatou-se a necessidade de capacitação de colaboradores para operar o sistema, e alto custo de implementação e treinamento de pessoal para o WMS. Quanto aos Condomínios de Armazéns Rurais, o WMS pode auxiliar no processo de gerenciamento e controle da armazenagem agrícola, como os Condomínios podem se beneficiar das vantagens expostas, e diluir os custos com a implementação do WMS entre todos os condôminos.
In this study, we investigate the interfacial droplet jetting characteristics and thermal stability of a focused surface acoustic wave device (F-SAW). An F-SAW device capable of generating a 20 MHz surface acoustic wave by applying sufficient radio frequency power (2–19 W) on a 128°-rotated YX-cut piezoelectric lithium niobate substrate for interfacial droplet jetting is proposed. The interfacial droplet jetting characteristics were visualized by a shadowgraph method using a high-speed camera, and a heat transfer experiment was conducted using K-type thermocouples. The interfacial droplet jetting characteristics (jet angle and height) were analyzed for two different cases by applying a single interdigital transducer and two opposite interdigital transducers. Surface temperature variations were analyzed with radio frequency input power increases to evaluate the thermal stability of the F-SAW device in air and water environments. We demonstrate that the maximum temperature increase of the F-SAW device in the water was 1/20 of that in the air, owing to the very high convective heat transfer coefficient of the water, resulting in prevention of the performance degradation of the focused acoustic wave device.
Engineering machinery, tools, and implements, Technological innovations. Automation