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Comparing Load-Bearing Capacity and Cost of Lime-Stabilized and Granular Road Bases for Rural Road Pavements
No full textIn Hungary, on-site mixed stabilization of cohesive soil is considered only as soil improvement not a proper pavement layer, therefore its bearing capacity is not taken into account when designing pavement. It was our hypothesis that on low-volume roads built on cohesive soil, lime or lime–cement stabilization can be an alternative to granular base layers. A case study was conducted to obtain initial results and to verify the research methodology. The efficacy of lime stabilization was evaluated across eight experimental road sections, with a view of assessing its structural and economic performance in comparison with crushed stone base layers reinforced with geo-synthetics. The results of the testing demonstrated elastic moduli of 120–180 MPa for the lime-stabilized layers, which closely matched the 200–280 MPa range observed for the crushed stone bases. The results demonstrated that lime stabilization offers a comparable load-bearing capacity while being the most cost-effective solution. Furthermore, this approach enhances sustainability by enabling the utilization of local soils, reducing reliance on imported materials, minimizing transport-related costs, and lowering carbon emissions. Lime stabilization provides a durable, environmentally friendly alternative for road construction, effectively addressing the challenges of material scarcity and rising construction costs while supporting infrastructure resilience. The findings highlight its potential to replace traditional base layers without compromising structural performance or economic viability
SÉRTETLEN, DE SÉRÜLÉKENY GYERTYASZÁL ALAKÚ ÁLLÓCSEPPKŐ DIGITÁLIS HÁROMDIMENZIÓS ALAKJÁNAK ELKÉSZÍTÉSE BARLANGI LÉZERSZKENNELÉSSEL TÖRTÉNŐ ADATGYŰJTÉS FELHASZNÁLÁSÁVAL A DETREKŐI-ZSOMBOLYBAN (SZLOVÁKIA)
No full textA Kis-Kárpátokban (Szlovákia) található Detrekői-zsombolyban (Plavecká priepast) lézerszkenneléssel gyűjtött adatok felhasználásával készült el a barlang legmagasabb és egyben legsérülékenyebb cseppkövének digitális 3D modellje. A terepi mérés a Leica BLK 360 műszerrel történt. A mérés útján kapott pontfelhő a Leica Cyclone és a Cloud Compare szoftverek segítségével került feldolgozásra és megjelenítésre. Az eredményfájlok jól szemléltetik az elkészült ponthalmazt. A most bemutatott adatgyűjtés és feldolgozás során előállt digitális 3D cseppkőmodell összehasonlítására is sor került egy korábbi, 2015-ben készült modellel. Ezen összehasonlítás nemcsak a cseppkő növekedéséről, hanem a különböző időpontokban készített felmérések között jelentkező ellentmondásokról is információt szolgál-tat
Properties of Earth-to-Air Heat Exchangers (EAHE): Insights and Perspectives Based on System Performance
No full textEarth–Air Heat Exchange (EAHE) systems are an eco-friendly and energy-efficient technology as pre-heating or pre-cooling systems in civil buildings. Technically, the performance of the EAHE system is influenced by properties associated with the technology. In this paper, the focus is placed on the properties covered by the published literature to understand how they impact the efficiency of these systems. The review scrutinizes the implication of pipe properties such as the material type (steel, Polyvinyl Chloride [PVC], concrete, or high-density polyethylene), diameter and length, and depth in the context of modern building design and energy conservation. Other properties considered in this work are air velocity and the bonding of pipes with the soil. The EAHE systems’ performance is not significantly influenced by the pipe material, unlike the pipe length and diameter. It is reported that longer pipes enhance the cooling output in the EAHE system. The pipe length positively correlates with the in-pipe air temperature. An increment in the pipe diameter led to a drop in the in-pipe air temperature. An indicative report states that an increasing air flow velocity can lead to thermal losses from pipes to their surrounding soil. The addition of sand below and above the pipe enhances the thermal conductivity, just as an increase in the moisture content of the soil will contribute. There are attempts to use additives, construction waste, graphite, and fly ash as a backfill material, but with opposing economic feasibility. Construction waste could help the EAHE system to improve by 80%. A combination of graphite and fly ash as a backfill material is cost-effective. Research on the pipe material type and standards development are limited. Overall, the pipe material type and length to adopt for an EAHE system are based on the funds’ availability for the construction
The sociological and physiological impacts of the creative economy
No full textIn recent years, the sociological and physiological impacts of the creative economy have garnered increasing attention within the academic community. The creative industries contribute to addressing social inequalities and shaping communal identities, but they also pose challenges concerning working conditions and social status. For example, a 2021 European Union report indicates that workplace stress levels are 15% higher among workers in creative industries compared to other sectors. The digital divide may further exacerbate social disparities, while creativity can drive social innovations, particularly in urban regeneration projects. Physiologically, creative activities significantly affect mental health; a 2022 study found that depression rates are 20% lower among those engaged in creative work. Media consumption habits and work environments are also critical factors, especially regarding work-life balance. Average working hours increased to 45 hours per week during the pandemic. This study aims to provide a comprehensive overview of the sociological and physiological aspects of the creative economy and
identify key research directions in this field
Research Gap in Personal Branding: Understanding and Quantifying Personal Branding by Developing a Standardized Framework for Personal Brand Equity Measurement
No full textPersonal Branding (PB) has gained significant attention in recent years, especially in career advancement and business success. This study addresses the research gap in Personal Brand Equity (PBE) measurement by developing and validating a standardized framework. Using mixed-methods research combining interviews with 10 professionals and surveys of 396 individuals across diverse professional categories, the study identifies and validates three dimensions of PBE: Brand Appeal, Brand Differentiation, and Brand Recognition. Factor analysis revealed six critical attributes influencing PBE (visibility, credibility, differentiation, online presence, professional network, and reputation) and distinguished between external- and self-Personal Brand Equity components. Data were analyzed using exploratory and confirmatory factor analyses (EFA and CFA), with reliability assessed through Cronbach’s alpha (>0.7). Findings demonstrate significant correlations between high PBE scores and positive career outcomes including job satisfaction, salary progression, and advancement opportunities. The resulting Personal Brand Equity Scale (PBES) provides both a measurement tool for professionals seeking to enhance their personal brands and a validated framework for future academic research on personal branding effectiveness
A hazai agrárinnovációs ökoszisztéma és az agrár szektort érintő, digitális fejlesztésekkel megoldható kihívások bemutatása
No full textKutatásom elsődleges célja, hogy bemutassa a hazai agrárinnovációs ökoszisztémát és rávilágítson a digitális fejlesztésekkel megoldható kihívásokra. Külön kitérek arra is, hogy a jelenlegi piaci és társadalmi körülmények között miért van még nagyobb szükség az agráriumot érintő fejlesztésekre. A szektorban dolgozók növekvő átlagéletkora, az éghajlatváltozás, az Európai Unió által szabott szigorú fenntarthatósági keretrendszer mind-mind abba az irányba mutat, hogy jelentős hatékonyságnövekedés mellett maradhat csak a hazai agrárium versenyképes. Véleményem szerint ennek egyik leghatékonyabb módja, ha a szektor előtt álló kihívásokat megpróbáljuk technológiai úton kezelni, amiben kiemelt szerepe lehet az agrár technológiai startupoknak. Ahhoz viszont, hogy az előttünk álló problémákra hozott megoldások minél előbb megszülethessenek, erős agrárinnovációs ökoszisztémára van szükség, ahol a fejlesztések, a szakértők, a tőke, a piaci tapasztalatok gyorsan és eredményre vezetően találkoznak. Kutatásom elkészítése során feltáró és feldolgozó módszereket egyaránt alkalmazok. A feltárómódszerek közül kiemelten fontosnak tartom a szakirodalmi kutatásokat. A cikk ennek keretében tárja fel a témát, irodalmi áttekintés formájában. A feldolgozott irodalmak alapján kijelenthető, hogy az agrár startupok folyamat optimalizáló megoldásainak köszönhetően környezetileg és gazdaságilag is fentarthatóbbá válik az agrárium, illetve egy erős, hazai agrár innovációs ökoszisztéma elősegíti a szektor problémáinak technológiai úton történő megoldását
Találd ki, valósítsd meg, légy sikeres! Innovációmenedzsment ismeretek és tapasztalatok (könyvismertetés)
No full text[Somogyi, M. (2021). Találd ki, valósítsd meg, légy sikeres! Innovációmenedzsment ismeretek
és tapasztalatok. CHIC Közép-magyarországi Innovációs Központ. 219 oldal, ISBN 978-615-01-0793-6
Synthesizing knowledge about tree diversity, density, and distribution in the savanna woodlands of Sudan
No full textSavanna ecosystems comprise a complex and diverse biome, marked by the balanced cohabitation of trees and shrubs alongside a rich assembly of herbaceous flora, particularly grasses. In Sudan, savanna ecosystems provide invaluable services that sustain the livelihoods of millions of people. Here, we synthesized the existing knowledge about tree density, diversity, and distribution in the savanna woodlands of Sudan to assess tree diversity, evaluate tree conservation status on the basis of tree abundance and distribution according to IUCN guidelines, and map tree diversity and density in savanna woodlands. The research process started with an extensive search for relevant literature across various databases. The data sources included Google Scholar and Web of Science, as well as reports and publications available in the libraries of Sudanese universities. The results revealed that savanna woodland contains 163 tree species belonging to 40 families. Fabaceae was the most frequent family, accounting for 44 species. The species richness among the sites ranged from 1 to 73 species, and the stand density ranged from 20.5 to 500 stems/ha. Moreover, this study revealed that Acacia seyal, Acacia senegal, Balanites aegyptiaca, and Ziziphus spina-christi are the most frequent species and that these four key species are well distributed throughout the savanna woodland of Sudan. While this first synthesis of tree diversity and distribution lacked data at the sample plot level, it should stimulate further research in this crucial ecosystem
Evaluating the Efficiency of Two Ecological Indices in Monitoring Forest Degradation in the Drylands of Sudan
No full textWith increasing threats to forest resources, there is a growing demand for accurate, timely, and quantitative information on their status, trends, and sustainability. Satellite remote sensing provides an effective means of consistently monitoring large forest areas. Vegetation Indices (VIs) are commonly used to assess forest conditions, but their effectiveness remains a key question. This study aimed to assess and map forest degradation status and trends in Lagawa locality, West Kordofan State, Sudan using the soil adjusted and atmospheric resistant vegetation index (SARVI) to quantify the relationship between SARVI and the Normalized Difference Vegetation Index (NDVI) and compare the efficiency of both indices in detecting and monitoring changes in forest conditions. The study utilized four free cloud images (TM 1988, TM 1998, TM 2008, and OLI 2018), which were processed using Google Earth Engine (GEE) to derive the indices. The study found significant forest degradation over time, with 63% of the area categorized as moderately to severely degraded. A strong, positive relationship between SARVI and NDVI (R2 = 0.9085, p < 0.001) was identified, indicating that both are effective in detecting forest changes. Both indices proved efficacy, cost-effectiveness, and applicable for monitoring forest changes across Sudan’s drylands. The study recommends applying similar methods in other dryland forests in other regions