Keresés

Keresési eredmények

• Testing the Sametest-effect in a BSc-level Business Communication Course Examination

  10-15

  Kun András István

  Farkas János

  Juhász Csilla

  Megtekintések száma:

  64

  Using secondary data, we empirically examine two biasing effects that may arise in the written evaluation of large groups of students. Suppose the students take the examination in consecutive groups, and we wish to avoid the distortion caused by tests of different difficulty. In that case, we can decide to use the same examination questions. However, the danger of the "same test effect" arises, according to which the group writing later can perform better if it receives information from the examinees in the previous round. Using the same examination tests cannot be recommended if that effect is significant. Another related potential phenomenon is the "revealed sameness effect". Accordingly, if the examinees are aware of the repetition of the questions, it significantly increases the scores of the following group. We tested these phenomena using the data of a three-round written examination. A previously published analysis of a larger sample found that the "same test effect" can be expected if the students decide in which round they take the examination. Since it was possible to freely register for the examination rounds for the assessment analyzed in this study, we assume that the "same test effect" will be significant. Based on the literature, we also expected that the "revealed sameness effect" would occur in the third round. The performed linear regression analysis (N=77) only found some weak evidence for the 'revealed sameness effect' but not for the 'same test effect'.

• The Dunning–Kruger Effect in Knowledge Management Examination of BSc Level Business Students

  14-21

  Kun András István

  Farkas János

  Juhász Csilla

  Megtekintések száma:

  190

  The Dunning-Kruger effect (DKE) in higher education evaluation is one of the current research areas of psychology, educational science, and management science (in our case). Its importance is that the less prepared one is, the less accurately one can judge what performance is expected of him. What is more, he will err more and will overestimate himself. The present study aims better to understand the phenomenon with new, small-sample empirical results. The study is part of a research series that has been ongoing at the University of Debrecen since 2015. It not only quantitatively expands the literature but also includes the course of Knowledge Management among those examined. During the research, students were asked both before the examination (N = 63) and after the examination (N = 76) to guess how many points they would achieve on a multiple-choice test. It supports the presence of DKE, both in the case of pre-examination and post-examination self-evaluations. Using four multivariate linear regression models, we examined whether the sign value or absolute value of the errors made during the guesses show a correlation - in addition to the available control variables - with the test score. Our results showed that the more accurate the pre-examination and post-examination estimations were, the higher the students' actual score was, while the less they tended to overestimate their preparation. This supports the presence of DKE, both in the case of pre-exam and post-exam self-evaluation.

• The Dynamic Effect of Trade Openness, Debt, and Foreign Investment in Ghana’s Economy: An ARDL Bound Testing Approach

  94-112

  Yeboah Evans

  Lamin Ceesay

  Megtekintések száma:

  97

  The impact of macroeconomic factors offers insight into the performance of an economy. This study investigates the dynamic short- and long-term effect of trade openness, external debt, and foreign direct investment (FDI) within Ghana's economy. Utilizing Autoregressive Distributed Lag (ARDL) bound testing and Granger causality analysis, the study examines data spanning from 1991 to 2022. The results of the ARDL cointegration test reveal a long-term relationship among the variables. However, in the short term, the findings present a mixed effect of FDI and trade openness, with both positive and negative impacts. In the long run, FDI and external debt exhibit a positive influence, whereas trade openness appears to impede economic growth. Furthermore, the Granger causality test identifies a unidirectional causality relationship between the variables and economic growth. The study suggests that the government implement investment-oriented and trade policies to stimulate economic growth. 

• The Effect of Administrative Empowerment on the Organizational Effectiveness of Bank Employees

  13-21

  Saleh Motasem

  Kabalan H.

  Megtekintések száma:

  165

  This study seeks to identify the level of the impact of administrative empowerment in its dimensions on the organizational effectiveness in the banking sector in Syria. In order to verify the objectives, develop and test the validity of the hypotheses, the descriptive approach was adopted. The study found that there is a statistically significant effect of the dimensions of administrative empowerment on the organizational effectiveness of workers in banking sector.  

• Artificial Intelligence in Human Resources Information Systems: Investigating its Trust and Adoption Determinants

  749-765

  Hmoud Bilal Ibrahim

  Várallyai László

  Megtekintések száma:

  3093

  With the rapidly emerging trend of employing Artificial Intelligence technologies within modern economics. This study is an attempt to fill the research gap associated with the factors that have influence with the adoption of artificial intelligence in human resources information systems on HR-leaders intention to use it. It empirically investigates the influences that trust, technological readiness, facilitating condition and performance expectancy on HR-professional’s behavioral intention to use AI in HRM. Besides, examine the moderating effect of age and experience on the proposed associations. Data were collected from by online questionnaire from 185 HR managers. A structural framework was introduced to test the relationship between study latent variables. Result exhibited that trust and performance expectancy has a significant influence on HR-professionals behavioral intention to use AI-HRIS. Trust and technological readiness showed a significant influence on HR-professionals performance expectancy of using AI-HRIS. While facilitating condition, organizational size and technological readiness did not show a significant influence on HR-professionals behavioral intention toward using AI-HRIS. Lastly, Age and Experience did not have a moderating effect on trust and performance expectancy association with the behavioral intention toward using AI-HRIS. The findings of this study contribute to the theory development of information technology diffusion in HRM.

• Investigating the Impact of Nature in Designing Cultural Environments for Children

  244-256

  Sadafi Nasibeh

  Azhdari L.

  Megtekintések száma:

  184

  There is a tendency to communicate with nature in human beings as a set of emotional experiences. This study investigates the impact of organic architecture in creating cultural spaces for children. The concepts of nature, naturalist architecture and children educational psychology, from the perspective of scholars and researchers in this area are investigated. The children’s perception of nature and their feelings were assessed and one hundred forty respondents among the instructors of cultural centres in different regions of Tehran have answered the questionnaires. To investigate the hypotheses, Univariate T - test and F - test were applied. The results showed that the stimulation of the natural environment has a positive and meaningful effect on curiosity, participation, and fantasy in children, while they show their impressions of nature indirectly. Therefore, designing applicable spaces according to children’s physics, using appropriate colours and furniture as well as more environmentally-related spaces, can have positive effects on social participation, intuitive and verbal skills of the children.

• Development and Characterization of Sisal Fiber Reinforced Polypropylene Composite Materials

  348-358

  Gerezgiher Alula Gebresas

  Bsrat Halefom Aregay

  Simon Andrea

  Szabó Tamás

  Megtekintések száma:

  360

  In most of the developing countries, plastic polypropylene is not fully recycled and converted in-to use after it is once used. Sisal fiber is also widely available in different developing countries like Ethiopia. Adding this two materials and developing automotive interior part was taken as a primary motive for it reduces cost and is environmentally friendly. Thus, the main purpose of this research is to develop composite material from natural fibre (sisal fiber) reinforced with recycled plastic waste (polypropylene) for interior automobile accessories specifically for internal door trim panel application. This research examines effect of fiber length, fiber loading and chemical treatment of fiber on the physical and chemical properties of the sisal fiber reinforced polypropylene (SFRPP) composite material. The waste polypropylene and the treated and untreated sisal fiber with variable length and weight ratio (fiber/matrix ratio) were mixed. Flammability of sisal fiber reinforced Polypropylene (SFRPP) composites material was examined by a horizontal burning test according to ASTM D635 and chemical resistance of the sisal fibre reinforced PP composites was studied using ASTM D543 testing method. The result on the flammability test shows that treated fiber has lower burning rate than untreated fiber and decreases with increase in fiber length and fiber loading. The resistance of the composites to water has increased as the fiber length increases and decreased as the fiber loading increase. Generally, SFRPP composite is found to have better resistance to water than NaOH and H2SO4 and treating the fiber has brought considerable improvement on chemical resistance of the composite. Fiber loading and fiber length has positive and negative effect on the flammability of the SFRPP composite respectively.

• Turisztikai célú támogatások jövedelmezőségi helyzetre gyakorolt hatásának vizsgálata az Észak-alföldi Régióban

  165-175

  Nagy Tünde

  Darabos Éva

  Megtekintések száma:

  101

  A turizmus a mai gazdaság egyik legnagyobb és legdinamikusabban fejődő ágazata, teljesítményének vizsgálata fontos kutatási terület. A szektor és vállalatainak teljesítménye szorosan összefügg, jelen tanulmány a vállalati oldalról történő teljesítményvizsgálattal foglalkozik. Pontos célja a 2007-2013. évi költségvetési időszakban juttatott turisztikai célú közösségi támogatások jövedelmezőségi helyzetre gyakorolt hatásának bemutatása az Észak-alföldi Régió két vállalatának példáján keresztül. A vizsgálat alapját a nyilvánosan elérhető statisztikai, vállalati adatok, valamint a vállalatok által kitöltött kérdőívből, illetve a pályázati nyilvántartó rendszerükből származó adatok képezik.

• Egyén, oktatás vagy munkahelyi környezet? Mi befolyásolja a diplomások foglalkoztatásának minőségét?

  244-260

  Kotsis Ágnes

  Megtekintések száma:

  181

  Jelen tanulmányban azt vizsgálom, hogy mi befolyásolja a diplomások foglalkoztatásának minőségét, amelyet az egyén végzettségének és a munkakör által megkövetelt végzettségi szintnek az illeszkedésével mérek. Ez alapján megkülönböztetek illeszkedő, és túlképzett munkavállalókat. Ez utóbbi kategóriát az irodalom alapján tovább bontom ténylegesen és látszólag túlképzett csoportokra az alapján, hogy az egyén elégedett-e a végzettségének illeszkedésével. Ha igen, akkor csak látszólagosan lesz túlképzett. A Debreceni Egyetem 2007 ben és 2009-ben végzett DPR adatain azt vizsgálom multinomiális logit modell segítségével, hogy az egyéni, oktatási és munkahelyi jellemzők hogyan befolyásolják ezekbe a kategóriákba kerülés esélyét, azaz a foglalkoztatás minőségét. Ennek során a szakirodalomban azonosított okok, mint a mobilitási ráta, ingázási hajlandóság, a piaci rigiditás, karrier mobilitás, munkatapasztalat érvényességét is tesztelem az adott mintán.

• Effect of the Flow Curve Determination on the Thinning of Drawn Parts

  16-25

  Kölüs Martin László

  Borbély Richárd

  Szőke Dániel Gyula

  Béres Gábor József

  Megtekintések száma:

  73

  This study presents the results of finite element simulations based on different variations of the flow curve of DC04 automotive thin sheet. The aim of our research is to investigate how different flow curve equations affect the variation of sheet thickness in cup drawing tests. In order to exclude other influencing factors in the experiment, both the sheet material and the geometric properties of the specimen, as well as the external state factors were considered to be the same in all cases. The finite element simulations were performed using Simufact 2021.1 software. Our results shows that there are no significant differences in wall thicknesses until we reach the zone of double necking, where essential differences are observed.

• The Effect of Sizes of the Cast Polyamide 6 Rods upon Tensile-Impact Strength

  21-24

  Odrobina Miklós

  Kalácska Gábor

  Keresztes Róbert

  Megtekintések száma:

  132

  We have studied the tensile-impact strength of the magnesium catalysed cast polyamide 6 (PA6) rods according to the EN ISO 8256:2004 standard. The purpose of our investigation was to follow: the mechanical properties of rods are mapped beside same casting technological process in case of different diameters. We have compared the received results with each other than have sought disparities. We examined cylindrical product (rod) in seven dimensional steps in diameter ranging from 40 mm to 300 mm. We have determined that the semi-finished products can be divided into two groups typically in case of their tensile-impact strengths in this size range. The tensile-impact strength is higher in case of the rods with a diameter of less than 100 mm and it is smaller in the larger dimension range. Therefore, the smallest tensile-impact strength can be established in case of the natural semifinished PA6 rods that each rod accomplishes independently of size. However, a range can be determined, which the tensile-impact strength values of product are separated according to the manufacturing size

• Investigation on Double Oxide Film Initiated Pore Formation in Aluminum Casting Alloys

  141-153

  Gyarmati Gábor

  Fegyverneki György

  Tokár Mónika

  Mende Tamás

  Megtekintések száma:

  330

  The most common, and in fact, the most deleterious defects of aluminum casting alloys are the so-called double oxide films or bifilms, which have a central role in porosity formation, as they can easily unfurl and inflate into pores during the solidification of the alloys. Sr addition is generally used in the foundry industry for the modification of the eutectic Si phase of hypoeutectic Al-Si alloys. However, Sr microalloying usually leads to an increased pore formation tendency. As bifilms are preferred sites for pore formation, it should be expected that Sr additions have a significant effect on the number and/or the structure of double oxide films present in the melt. In this work, the relationship between Sr-concentration and the susceptibility to pore formation has been investigated through the evaluation of melt quality of melts which had different levels of Sr. The bifilm content of the melts was investigated by the analysis of K-mold specimens and X-ray computed tomography (CT) of reduced pressure test (RPT) samples. It was found that liquid alloys with a higher Sr concentration had a significantly greater tendency to pore formation, which can be explained by the presence of a larger number of bifilm defects in the liquid alloy.