1. Mixed-field radiation of 3-D MLC flash memories for space applicationsLorenzo Gonzales, Salvatore Danzeca, Salvatore Fiore, Iztok Kramberger, 2024, original scientific article Abstract: This article presents the results of dynamic measurements of 3-D multilevel cell (MLC) NAND flash memories in a mixed-field radiation facility CERN High-energy AcceleRator Mixed field/facility (CHARM), CERN. The results show that the behavior of devices is comparable to tests with specific high energy particles, such as high energy protons, heavy ions, and to TID tests. The observed TID and single-event effects (SEEs) in flash memories from the existing relevant work are also observed in mixed field, making the environment suitable for an accelerated system level test. As the CHARM hadron energy spectrum is comparable to the low Earth orbit (LEO) environment, the facility is appropriate as an accelerated test for space applications. Furthermore, the volumetric characteristics of the devices can be observed in this 3-D radiation facility. Additionally, bad bit (BB) spread was observed, and the necessary radiation induced errors in NAND devices are discussed.
Keywords: bit error rate, flkash memories, memory controller, mixed field facility, multilevel cell, MLC, radiation hardness, single-event upsets, SEUs, space applications, total ionizing dose
Published in DKUM: 03.02.2025; Views: 0; Downloads: 1
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2. Development of Methodology for Estimation of Energy-Efficient Building Renovation Using Application of MINLP-Optimized Timber–Glass Upgrade ModulesMaja Lešnik Nedelko, Stojan Kravanja, Miroslav Premrov, Vesna Žegarac Leskovar, 2025, original scientific article Abstract: Vertical addition to already-existing structures is an approach to energy-efficient building renovation. It presents an opportunity for the densification of built-up areas and the construction of new usable spaces. While many studies have dealt with the subject of renovating buildings with a focus on energy efficiency, far fewer studies have specifically examined the potential of vertically extending existing buildings, an approach which could be introduced in new sustainable building policies. The objective of this study is to redevelop optimal timber–glass upgrade modules, considering the ideal proportions of glazing for all cardinal directions, by using discrete Mixed-Integer Non-Linear Programming optimization. The novelty of the suggested method resides in the synchronous optimization of the upgrade modules’ daylighting and energy-efficiency performance, resulting in the creation of optimization methods that can determine the optimal glazing proportions for all cardinal directions and incorporate rational design and window measurement. The impact of the developed Mixed-Integer Non-Linear Programming-optimized upgrade modules is compared to previously designed optimized upgrade modules. Finally, a methodology for estimating the energy efficiency of building renovations incorporating vertical additions using the timber–glass upgrade modules was developed, supporting the quick assessment of the reduction in hybrid buildings’ energy consumption for heating and cooling according to boundary conditions, presuming that they undergo the suggested renovations. The findings are applicable (not exclusively) to Slovenia’s residential building stock, which makes up around 20% of the country’s current housing stock and was mainly constructed between 1946 and 1970. This offers a substantial opportunity to improve the overall sustainability and energy efficiency of the country’s housing stock. The proposed approach offers a holistic solution to drive sustainable development in the built environment by incorporating all three pillars of sustainability (environmental, social, and economic).
Keywords: energy efficient building renovation, energy efficiency, building vertical addition, timber–glass upgrade modules, mixed-integer non-linear programming, MINLP, optimization, visual comfort, energy sustainability
Published in DKUM: 16.01.2025; Views: 0; Downloads: 3
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3. Identification and ranking of core values in family medicine : a mixed methods study from UkrainePavlo Kolesnyk, Sabine Bayen, Ivanna Shushman, Andrew Kolesnyk, George Kuodza, Zalika Klemenc-Ketiš, Thomas Frese, 2021, original scientific article Abstract: Introduction/Context: The term core value (CV) can be defined as fundamental beliefs or principles, guiding one's behavior in a social context. Though core competencies of family medicine (FM) have been clearly defined by WONCA, there has been an ongoing debate on what the CVs are for family doctors (FDs). Ukraine is a developing country in the middle of Europe with a population of 43 million inhabitants, gained independence from the Soviet Union in 1991. Ukraine is a low-income country, developing a modern European healthcare system, especially regarding FM. To implement WONCA standards, it is mandatory to assess the ongoing understanding of CVs in clinical daily practice among active FDs, working in different countries of Europe including Ukraine. Research questions: How do Ukrainian FDs (Delphi group experts) define the CVs of FM in Ukraine and how important are these CVs to a wider population of Ukrainian FDs in their everyday practice? Methods: A mixed method study was conducted in two steps during August and September 2020 in Ukraine. The first part was a qualitative Delphi round (three rounds) design among 20 Ukrainian FDs who were familiar with teaching and terms like CV. A consensus list of six CVs has emerged from the Delphi round study. The second part was a quantitative survey among Ukrainian FDs, who were not specially used to discussing CVs. The consensus list of those six CVs was then submitted to 2000 FDs (randomly selected) who were not involved in the Delphi team, to rank those values from one to nine, according to the importance from their personal point of view. Demographic characteristics have been assessed for all the participants of the Delphi round and quantitative survey. Results: Twenty FDs were involved as experts in the first Delphi round, whereas only five experts continued their participation in the second and the third rounds of the survey. The following six CVs emerged from the Delphi round: comprehensive approach, care coordination, first recourse, continuity of care, integrated approach, and patient and family centered care. The final sample consisted of 375 FDs (19% response rate). There were 323 (88.7%) female and 34 (9.3%) male FDs in the sample. The mean age of the participants was 44.6+-13.5 years. Discussion/Conclusion: Defining CVs for FM by Ukrainian FDs in a given socio-economical and historical-cultural setting is crucial to optimize primary medical care and to guarantee an appropriate and successful implementation of WONCA standards as well as CVs in different countries including those where reformation of the health system is ongoing.
Keywords: family medicine, Ukraine, core values, delphi, mixed methods, Ukraine
Published in DKUM: 27.08.2024; Views: 88; Downloads: 13
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4. Urinary incontinence – from childhood onwardsDragana Živković, Damir Franić, Vladimir Kojović, 2022, review article Abstract: Urinary incontinence (UI) is a condition that affects patients of all ages, starting with childhood. There are two peaks in its incidence, i.e., in childhood and another one in patients over 40 years of age, which increases continuously with patient age. It is a condition recognized by the World Health Organization as a set of diseases (International Classification of Diseases, ICD-10), and the International Classification of Functionality recognizes the associated extreme disablement. UI is a major health problem affecting the lives of an estimated 400 million persons worldwide. The global aging of the population will cause rise in the incidence of UI in the future. It is expected that UI itself will become a serious health and social burden for both patients and health service providers. UI can be an isolated problem, or it can be associated and/or aggravated by any associated disorder affecting the nervous system such as myelomeningoceles, Parkinson’s disease or stroke. UI often affects the patient daily life, and it can have repercussions on their physical, financial, social, and emotional well-being. At last, it has a negative influence on their sexual health.
Keywords: Urinary incontinence, stress urinary incontinence, mixed urinary incontinence, dysfunctional voiding
Published in DKUM: 09.07.2024; Views: 99; Downloads: 9
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5. On metric dimensions of hypercubesAleksander Kelenc, Aoden Teo Masa Toshi, Riste Škrekovski, Ismael G. Yero, 2023, original scientific article Abstract: In this note we show two unexpected results concerning the metric, the edge metric and the mixed metric dimensions of hypercube graphs. First, we show that the metric and the edge metric dimensions of ▫$Q_d$▫ differ by at most one for every integer ▫$d$▫. In particular, if ▫$d$▫ is odd, then the metric and the edge metric dimensions of ▫$Q_d$▫ are equal. Second, we prove that the metric and the mixed metric dimensions of the hypercube ▫$Q_d$▫ are equal for every ▫$d \ge 3$▫. We conclude the paper by conjecturing that all these three types of metric dimensions of ▫$Q_d$▫ are equal when d is large enough.
Keywords: edge metric dimension, mixed metric dimension, metric dimension, hypercubes
Published in DKUM: 21.05.2024; Views: 123; Downloads: 11
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6. Changed lifestyles during the COVID-19 pandemic : the need for health education in the curriculum of pedagogical studentsJoca Zurc, 2024, original scientific article Abstract: The health education in schools became the focus of public attention during the global pandemic of COVID-19. Teaching practice changed to meet the increased demand for pupils’health, triggering a reevaluation of higher education curricula for pedagogical students. Therefore, this mixed methods study aimed to investigate the lifestyle of university students of pedagogy in Slovenia during the COVID-19 pandemic.One hundred and four students (87.4% females and 12.6% males) met the criteria and participated in an online survey in which they self-assessed their physical activity, eating habits, mental well-being, and sleep quality. The convergent parallel mixed methods design was used to obtain qualitative descriptions of student experiences withlifestyle domains and quantitative data on their attitudes towards the impact of lifestyle on physical and mental well-being during the pandemic. The results suggestthat the pandemic did significantly impact student lifestyles, especially their mental well-being. Although most students maintained a healthy lifestyle during the pandemic, they also reported a deterioration in other measured domains of health-related behaviour. Particular attention should, therefore, be paid to the curriculum of pedagogical students to develop their competences in health education and readiness toassume an active role as educators for their future pupils’ health.
Keywords: health education, university students, curriculum development, education professions, pedagogy, university students, mixed methods research
Published in DKUM: 13.05.2024; Views: 238; Downloads: 17
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7. A critical analysis on multifaceted benefits of mixture of cover crops over pure standMarko Zupanič, Branko Kramberger, 2023, review article Abstract: Winter cover crops (WCCs) are fast-growing and high biomass producing crops that are included in the of crop rota- tion between two main cash crops. WCCs are used for greening the soil and can increase the yield of the main crop by increasing soil organic matter (SOM), soil water infiltrability and reducing water runoff and erosion, decreasing the weeds population and other soil-borne harmful biotic agents, improving soil microbial community, and enhancing agroecosystem services; however, yield can be adversely affected if they fix excessive nitrogen and do not release it in a timely manner. The carbon/nitrogen (C/N) ratio achieved in soil greening is a major factor in the availability of soil nitrogen, regardless of the location of soil residues; therefore, one option is to increase the nitrogen content of WCCs by sowing a mixture of legume and non-legume crops, since non-legumes such as grasses typically have a low nitrogen content and little to no positive effect on soil nitrogen availability on subsequent crops. The combination of legumes and non-legumes as WCCs exhibit multifaceted benefits such as quality biomass production, crop diversification, efficient plant protection, enrich- ment of soil microbes, biological nitrogen fixation, and so on. The integration of WCCs grasses and legumes into the crop rotation increases rational nitrogen management and can also increase SOM content and, consequently, soil fertility. The effective release of mineral nitrogen into the soil along the time should be taken into account in order to minimize leaching and optimize the symbiotic N fixed for the subsequent cash crop. Finally, with WCCs, it is possible to produce high-quality animal feed in pure stands and in mixtures in order to obtain on sustainable farm forage resources.
Keywords: cover crops, pure stand, mixed stand, agroecosystem services, advantages
Published in DKUM: 19.04.2024; Views: 268; Downloads: 10
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8. Effectiveness of health promotion interventions in primary schools : a mixed methods literature reviewJoca Zurc, Camilla Laaksonen, 2023, review article Abstract: School-based health promotion interventions (HPIs) are commonly used in schools, but scientific evidence about the structures of effective interventions is lacking. Therefore, we conducted a mixed methods systematic literature review to recognize the HPI structures related to their effectiveness. Based on the inclusion criteria, 49 articles were selected for the literature review. The articles, published in 2011–2022, described 46 different school-based interventions conducted in 20 different countries. The average duration of the interventions was 12 months, and they were implemented mostly with an RCT study design (61.2%) and by targeting children (69.4%). Three main groups of interventions were identified and explained: (1) extensive and long-term interventions; (2) school policy-changing interventions; and (3) highly effective interventions. Effective school-based HPIs included multiple target groups, multiple providers with external experts, and an efficient duration and timing of follow-ups. The implications for educational research and school practice are presented. Evidence on the effectiveness of health-related interventions is still lacking and needs to be addressed in further studies.
Keywords: education, school health, health promotion, health education, intervention effectiveness, systematic literature review, mixed methods review
Published in DKUM: 21.03.2024; Views: 299; Downloads: 19
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9. Rationalisation of costs in the collection, segregation and transport of municipal wastePaweł Zając, Ivona Bajor, Matevž Obrecht, Stanisław Ejdys, 2023, original scientific article Abstract: The article contains answers to three "why" questions: - why the waste management system still does not bring the expected results, and the Polish state is one of the lowest-ranking in the European score regarding the amount of segregated waste; - why the sale of selected secondary raw materials and their material reuse in production processes do not cover the costs related to waste management; - why it does not bring additional profits. The article is based on research conducted in Wroclaw from 1998 to 2018. There is a cost model that can be adapted to similar cases. The article deals with removing organisational and/or technical reasons causing the stagnation of selective waste collection.
Keywords: waste, mixed, sorting, fee, management
Published in DKUM: 16.02.2024; Views: 204; Downloads: 20
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10. Business IT alignment impact on corporate sustainabilityUroš Zabukovšek, Polona Tominc, Samo Bobek, 2023, original scientific article Abstract: Business-IT alignment (BITA) has become crucial for effective organisational management in today's interconnected global economy. This article investigates the relationship between BITA and corporate sustainability, exploring how businesses can leverage BITA for sustainable growth and development. The study employs a case research approach in a multinational manufacturing organisation, utilising a mixed methods research (MMR) design. In the quantitative part of the research, the PLS-SEM technique was used to examine the influence of six BITA factors on employees' self-perceived action competence for sustainability (SPACS). This study confirmed that all six BITA factors strongly influence all three SPACS factors. In the qualitative part of the research, semi-structured interviews were used to measure the BITA maturity level of the organisation and the influence of BITA factors on corporate sustainability. Based on quantitative and qualitative research results, it can be confirmed that BITA strongly influences corporate sustainability. Results also confirm that there is no universal approach to BITA and its influence on corporate sustainability. Organisations must focus on all factors of BITA equally to achieve better levels of BITA and ensure its influence on corporate sustainability.
Keywords: business–IT alignment (BITA), corporate sustainability, SPACS, case research, mixed methods research (MMR), PLS-SEM
Published in DKUM: 14.02.2024; Views: 340; Downloads: 31
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