VGTU Journals (Vilnius Gediminas Technical University - Vilnius Tech)
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    5144 research outputs found

    Advantages and disadvantages of the remote teamwork

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    Remote teamwork has become common during the pandemic and continues even after it is over. In Lithuania alone, during the pandemic, around 40% of employees worked or still work remotely, while in the US this number reaches 50%. The purpose of this article is to compare the theoretical advantages and disadvantages of remote teamwork presented by scientists with the opinion of experts. Several main factors were selected after literature analysis and were given to the experts to evaluate them in a survey which was created using Likert scale. Experts were selected from one financial company and they lead teams of 7–10 people and have been working remotely for the past two years. The obtained results were evaluated using Kendall’s concordance coefficient and factor analysis methods. These methods helped evaluate the compatibility of the experts’ opinions and factors were divided into advantages and disadvantages based on the experts’ evaluations. The theoretical and practical assessment of the advantages of remote teamwork showed that the opinions of scientists and experts differ. This research can help remote teams and their managers to find what they can improve. Article in Lithuanian. Nuotolinio komandinio darbo privalumai ir trūkumai Santrauka Nuotolinis komandinis darbas pandemijos metu tapo įprastu reiškiniu, kuris tęsiasi ir pandemijai pasibaigus. Vien Lietuvoje pandemijos metu apie 40 % darbuotojų dirbo arba vis dar dirba nuotoliniu būdu, o JAV šis rodiklis siekia mažiausiai 50 %. Šio straipsnio tikslas yra palyginti teorijoje mokslininkų pateikiamus nuotolinio komandinio darbo privalumus ir trūkumus su ekspertų nuomone. Atlikus literatūros analizę buvo pasirinkti keli pagrindiniai veiksniai ir duoti ekspertams įvertinti Likerto skalėje apklausos metu. Buvo pasirinkti ekspertai iš vienos finansinės įmonės, jie vadovauja 7–10 žmonių komandoms ir pastaruosius dvejus metus dirbo tik nuotoliniu būdu. Gauti rezultatai buvo vertinami Kendall konkordancijos koeficientu ir faktorinės analizės metodais. Šie metodai padėjo įvertinti ekspertų nuomonės suderinamumą ir remiantis jų vertinimais suskirstyti veiksnius į privalumus ir trūkumus. Teorinis ir praktinis nuotolinio komandinio darbo privalumų ir trūkumų vertinimas parodė, jog mokslininkų ir ekspertų nuomonės išsiskiria – pateiktus teiginius mokslininkai ir ekspertai skirtingai priskiria nuotolinio komandinio darbo privalumams ir trūkumams. Šis tyrimas naudingas nuotoliniu būdu dirbančioms komandoms ir jų vadovams, siekiant sužinoti, ką būtų galima pagerinti. Reikšminiai žodžiai: nuotolinis darbas, komandinis darbas, nuotolinis komandinis darbas, darbo ir gyvenimo balansas, darbo efektyvumas, pasitenkinimas darbu, bendravimas komandoje

    Evaluation of the impact of financial technologies on the financial efficiency of commercial banks

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    The topic of financial technologies (Fintech), which has attracted enormous interest in the last decade, has become one of the most promising niches that allow participants providing services in the payment market to improve the efficiency of financial activity systems. Financial industry players such as commercial banks have begun to pay special attention to the development of this new niche. In order to maintain or occupy higher market positions, they must take into account the potential of financial technologies and their possible exploitation by integrating new solutions into already functioning banking systems. This article aims to reveal the influence of financial technologies on the financial efficiency of commercial banks. After highlighting the importance of financial technologies for commercial banks in the theoretical part of the study, the analytical part examines the financial indicators of Lithuanian commercial banks (SEB, Swedbank, Šiaulių bankas, and Citadelė) in the period 2017–2021. Correlation and regression analysis will be used to determine the impact of financial technologies on the financial efficiency of commercial banks. The results of this study determines how financial technology impacts the financial performance of commercial banks. Article in Lithuanian. Finansinių technologijų įtakos komercinių bankų finansiniam efektyvumui vertinimas Santrauka Per paskutinį dešimtmetį milžiniško susidomėjimo sulaukusi finansinių technologijų (Fintech) tema tapo viena perspektyviausių sričių, leidžiančių mokėjimų rinkoje paslaugas teikiantiems dalyviams pagerinti finansinės veiklos sistemų efektyvumą. Tokie finansinės industrijos dalyviai, kaip komerciniai bankai, pradėjo skirti ypatingą dėmesį šios naujos nišos galimybių plėtrai. Siekdami išlaikyti ar užimti aukštesnes rinkos pozicijas, jie privalo atsižvelgti į finansinių technologijų potencialą ir galimą jų panaudojimą integruojant naujus sprendimus į jau funkcionuojančias bankines sistemas. Teorinėje tyrimo dalyje išryškinama finansinių technologijų svarba komerciniams bankams, analitinėje dalyje nagrinėjami Lietuvos komercinių bankų (SEB, Swedbank, Šiaulių bankas ir Citadelė) finansiniai rodikliai 2017–2021 m. laikotarpiu. Finansinių technologijų poveikiui komercinių bankų finansiniam efektyvumui nustatyti bus pasitelkiamos koreliacinė ir regresinė analizės. Šio tyrimo rezultatai parodė, kaip finansinės technologijos veikia komercinių bankų finansinį efektyvumą. Reikšminiai žodžiai: finansinės technologijos, komerciniai bankai, finansinio efektyvumo vertinimas, finansinių technologijų įtaka

    Could “digital gold” resist global supply chain pressure?

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    Exploring the safe-haven characteristics of bitcoin from novel perspectives is crucial to diversify the investment and reap the benefits. This investigation employs bootstrap full-and sub-sample techniques to probe time-varying interrelation between global supply chain pressure (GSCP) and bitcoin price (BP), and further answer if “digital gold” could resist the strains of global supply chain. The empirical outcomes suggest that GSCP positively and negatively affects BP. The positive influence points out that high GSCP might boost the international bitcoin market, driving BP to rise, which indicates that “digital gold” could resist the pressures of global supply chain. But the negative effect of GSCP on BP could not support the above view, mainly affected by the weak purchasing power and more valuable assets, which is not consistent with the assumption of the inter-temporal capital asset pricing model (ICAPM). In turn, GSCP is adversely affected by BP, highlighting that the international bitcoin market may be viewed as a stress reliever for the global supply chain. Against a backdrop of the deteriorative Russia-Ukraine war and the intensifying global supply chain crisis, the above conclusions could bring significative lessons to the public, enterprises and related economies. First published online 17 April 202

    Valuation of reverse mortgages in the Spanish market for foreign residents

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    The continuous growth in life expectancy, besides to the difficult economic and financial situation of the public pension system in Spain, makes reverse mortgages an attractive solution for providing additional income to retirees. However, despite being almost 20 years old, the Spanish market remains immature. Consequently, providers face significant risks, due to factors such as interest rates, housing prices, and longevity. Numerous tourists visit Spain, and many retire there, obtaining legal residence. Therefore, lenders could be interested in marketing reverse mortgages to foreign residents. Nevertheless, the longevity risk faced by these lenders may differ depending on the nationality of the borrower, and profits and losses could vary. Consequently, we propose a methodology for comparing the pricing of reverse mortgages in Spain by considering differences in longevity risk. Specifically, we calculate the amount offered by three types of reverse mortgages to customers of different nationalities, genders, and ages with contracts made in Spain. Our conclusions are pertinent to Spanish lenders since the results indicate that, in general, a Spanish lender would assume a slightly larger risk when lending reverse mortgages to borrowers of the selected nationalities, regardless of other considerations, such as legal issues, which are not addressed in this article. First published online 31 October 202

    What hinders Internet of Things (IoT) adoption in the Chinese construction industry: a mixed-method

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    Although the Internet of Things (IoT) has aroused much interest as a potential approach for improving various construction activities, the extent of its adoption remains limited. The multiple barriers that prevent the wider adoption of IoT in the construction industry need detailed investigation. However, limited research has attempted to understand the barriers to IoT adoption. Therefore, this study aims to identify the critical barriers to IoT adoption in the construction industry and explore the prioritization and hierarchical structure of the barriers factors. Data were collected from relevant literature and feedback from Chinese industry experts, sixteen barriers against IoT adoption were identified and categorized based on the TOE framework assessed in the construction industry. An integrated interpretation structure model and decision-making and trial evaluation laboratory (ISM-DEMATEL) approach is adopted to analyze the interdependence between identified constructs and their intensities. In addition, the identified constructs are also clustered into a suitable group using MICMAC analysis. Results show that inadequate infrastructure, lack of governance, and top management support are the fundamental barrier against IoT adoption. By revealing the mutual relationships and interlinking of barriers, this study will help researchers and practitioners in the construction industry to focus on strategic efforts to overcome these obstacles to effective IoT implementation. This research revealed the barriers to IoT implementation in the Chinese construction industry. Also, it provides methodological tool references for exploring the impact factor of other similar innovative technology applied in this industry

    Assessment of groundwater quality for irrigation purpose using irrigation water quality index (IWQI)

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    Groundwater represents an important natural resource for sustaining life. This study was conducted to evaluate groundwater in the Doukkala region in Morocco, using the Irrigation Water Quality Index (IWQI) and uses Inverse Distance Weighting (IDW) in GIS was to show the spatial distribution of water quality parameters. It collected 97 of samples from groundwater and were estimated the sodium concentration (Na%), and sodium absorption rate (SAR), Also, Residual sodium carbonate (RSC), Kelly index (KI), magnesium content (MR), salinity potential (PS), and permeability index (PI). According to the distribution map of the Irrigation Water Quality Index (IWQI) for the study area, about 22.7% of samples fall into the severe restriction (SR) category, which can be used to irrigate plants with high salinity tolerance, 34.02 of samples fall under the high restriction (HR) category, 23.7% of samples fall into the moderate restrictions (MR) category, 17.52% of samples fall under the low restriction (LR) category, and 2.06% of samples fall under the no restriction (NR) category. The results of (IWQI) indicated that the groundwater quality in the study area is mostly suitable for irrigation purposes

    Existence of entropy solution for a nonlinear parabolic problem in weighted Sobolev space via optimization method

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    This paper investigates the existence result of entropy solution for some nonlinear degenerate parabolic problem in weighted Sobolov space with Dirichlet type boundary conditions and L1 data

    90th anniversary of the amazing and heroic deed of Steponas Darius and Stasys Girėnas

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    Editorial"90th anniversary of the amazing and heroic deed of Steponas Darius and Stasys Girėnas"Aviation, 27(3), pp. 129–130 &nbsp

    The influence mechanism of outward FDI reverse technology spillovers on China’s green innovation

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    With rapid global development, outward foreign direct investment (FDI) has become a controversial issue, mainly focused on whether it is helpful to domestic green innovation, especially in developing countries. How does outward FDI reverse spillover technology to China, and does China’s innate endowment restrict it? The relevant mechanisms remain unclear. Therefore, this study investigated the heterogeneous effect of absorptive capacity on the impact path of reverse technology spillovers of outward FDI on green innovation in China. A fixed-effects panel model and stepwise regression analyze the direct relationship between outward FDI and green innovation and the mediating relationship of absorptive capacity. Threshold analysis reveals the mutation point of the mediating effect of absorptive capacity among China’s 31 provinces. Domestic green innovation is directly stimulated by more significant reverse technology spillovers of outward FDI. Absorptive capacity has an indirect impact as an intervening variable. The mediating effect will only make sense on one side of the threshold because the transformation effectiveness of green innovation is improved only by greater absorptive capacity, including adequate green financial support, more outstanding human capital, and a smaller technology gap. Moreover, it revealed significant regional heterogeneity in China. First published online 01 December 202

    How does economic policy uncertainty affect green innovation?

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    This research examines the impact of economic policy uncertainty (EPU) on green innovation by using the panel fixed effects model from 2000 to 2017 for the samples of 31 provinces in China. The general conclusion is that there exists a positive link from EPU to green innovation, and that the impact of EPU varies significantly among different provinces that have diverse levels of marketization and trade openness. Specifically, provinces with higher marketization and degrees of trade openness have witnessed stronger positive effects from EPU on green innovation, whereas the correlation is rather weak in regions with low levels of those two factors. Our findings serve as a research reference for how governments may boost green innovation in the face of increasing EPU. First published online 25 November 202


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