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Particleboard Surface Optimization for High-Quality Laminating with Decor Paper
No full textThe level of wood consumption is important in particleboard (PB) manufacturing because wood is a natural source. This study aimed to determine the optimum wood consumption in PB manufacture. The study examined how the PB's surface (SL) and core (CL) layer ratio and sanding tolerance affect the PB surface laminating condition. The optimal manufacturing conditions were determined among different combinations of PB density (520 or 560 kg/m3), SL/CL ratio, and sanding thickness using the multi-criteria decision-making method (MCDM). Grey relational analysis (GRA) was used as MCDM. Samples were characterized according to TS EN 312. The moisture content (MC) increased (30%) as the SL ratio increased. Thickness swelling (TS) and water absorption (WA) generally decreased as SL increased. Increasing surface layer density and board density significantly improved internal bond (IB) strength and surface stiffness (SS). Modulus of rupture (MOR) and elasticity (MOE) decreased as the sanding tolerance increased. Surface and edge screw withdrawal (SRy and SRk) resistance were increased as the density, sanding tolerance, and surface density increased. This study is the first comprehensive optimization approach to improve quality in coating low-density particle boards with decorative paper, potentially leading to material savings and production efficiency for the furniture and coating industries
Effects of Mindfulness-Based Practices in the Perinatal and Postpartum Periods on Women's Health: A Systematic Review
No full textThe aim of this systematic review was to evaluate the effects of mindfulness interventions on women's mental health in the perinatal and postpartum period. In the study, randomized controlled studies published in the last five years, from January 2018 to September 2023, were searched in CINAHL, PubMed, Cochrane Library, Science Direct, and Springer Link databases. The keywords Pregnancy, Pregnant, Prenatal, Perinatal, Postpartum, Mindfulness, Meditation, Self-compassion and Randomized controlled trial were used while searching the databases. The assessed articles were subjected to quality assessment using the PRISMA checklist and the Joanna Briggs Institute's Critical Appraisal Checklist for Randomized Controlled Trials. As a result of the search, 26 studies were found. The studies revealed that the most commonly applied mindfulness intervention among intervention groups was self-help programs in an online setting. Mindfulness-based practices significantly impacted women's mental health, reducing fear of childbirth, depression, anxiety, and stress levels, while enhancing psychological well-being, self-efficacy, self-compassion, and mindfulness. Furthermore, these practices also benefited women’s physical health, contributing to higher rates of normal vaginal births and increased maternal-fetal attachment. They were found to lessen birth pain, reduce the need for medication or anesthesia, and support the adoption of healthy lifestyle behaviors. These findings suggest that mindfulness interventions, which positively influence the mental health of both mothers and infants, should be widely applied to women, and the results of this study should be disseminated
Some observations on I-statistically pre-Cauchy sequences of complex uncertain variables defined by Orlicz functions
No full textIn this research article, we introduce I-statistically pre-Cauchy sequences of complex uncertain variables in five different aspects of uncertainty, namely: in mean, in measure, in distribution, in almost sure, and in uniformly almost sure. We also explore the connection between I-statistically pre-Cauchy sequences and I-statistically convergent sequences using complex uncertain variables. Additionally, we initiate the study of I-statistically pre-Cauchy sequences of complex uncertain variables through Orlicz functions
Novel 1,2,4-triazole-derived Schiff base derivatives: Design, synthesis, and multi-enzyme targeting potential for therapeutic applications
No full textThis study synthesized a series of Schiff base derivatives featuring a 1,2,4-triazole framework and characterized through FT-IR, 1H NMR, 13C NMR, 19F NMR, MS, and elemental analysis. Subsequently, the inhibitory activities of these compounds were systematically evaluated in vitro against human carbonic anhydrase (hCA) isozymes I and II, acetylcholinesterase (AChE), and butyrylcholinesterase (BChE). The results revealed that compounds 5a and 5c were particularly effective against cholinesterase enzymes, demonstrating their potential for neuroprotective applications. Meanwhile, compounds 5f and 5g exhibited remarkable inhibition of hCA I and II isozymes, suggesting their promise as selective inhibitors for therapeutic areas. Furthermore, molecular docking analyses revealed strong and specific interactions between the active compounds and enzyme binding sites, further supported by molecular dynamics simulations. Additionally, ADMET profiling of all compounds indicated favourable pharmacokinetic properties. The ADMET results suggest that these compounds hold significant potential for clinical applications in central nervous system and various disorders. These findings strongly suggest that the synthesized compounds are promising candidates for addressing unmet therapeutic needs in neurodegenerative and metabolic disorders, with potential applications in multienzyme targeting therapies.Zonguldak Bulent Ecevit University [2024-22794455-02]The authors would like to thank the funding support from Zonguldak Bulent Ecevit University (2024-22794455-02)
The Mediating Role of Interest in Physical Education Class Between Satisfaction With Life and Attachment to School
No full textIn this study, the mediating role of interest in physical education class in the relationship between satisfaction with life and attachment to school was examined. The study included 395 students studying in secondary schools in Çanakkale province in the 2023–2024 academic year. The scales of attachment to school, satisfaction with life and interest in physical education and sports lessons were used in the study. In the research, the mediation analysis process was carried out through the JASP 0.16.4 statistical program. It was concluded that the model that was tried to be tested was confirmed. As a result of the model, it was found that satisfaction with life had a direct effect on attachment to school, attachment to friends and attachment to teachers. In addition to this result, it was determined that it had an indirect effect on attachment to school, friends and teacher through interest in physical education class. In line with the findings of this study, it is seen that interest in physical education and sports lessons is effective in increasing students’ attachment to school, teacher and friends. For this reason, it is important to create pleasure and entertainment-oriented content especially in young age groups (primary and secondary school) in order to increase students’ interest in the course. © 2025 Elsevier B.V., All rights reserved
Development and characterization of coconut oil-based phase change material integrated flexible polyurethane biocomposites for thermal energy storage applications
No full textWith growing global energy demand and the urgent need to reduce carbon emissions, developing sustainable materials with thermal energy storage capabilities has become essential. This study introduces, for the first time, a flexible polyurethane biocomposite (FPB) containing directly integrated unencapsulated coconut oil-based phase change material (CO-PCM), without micro-shells or encapsulation. This novel approach simplifies fabrication, reduces cost, and enhances thermal and mechanical performance through direct polymer-phase change material interaction. Flexible polyurethane biocomposites incorporating varying concentrations (0 %, 15 %, 30 %, and 45 %) of CO-PCM were synthesized using a two-step method involving polyether polyol, isocyanate, and a catalyst. Increasing CO-PCM content improved the physical and thermal properties of the composites. At 45 wt% CO-PCM, bulk-density increased by 51 %, Shore A hardness by over 43 %, and tensile strength by 14 %, while strain decreased from 82 % to 53 %. Thermal conductivity improved by 15 %, and activation energy rose by 30 %, indicating enhanced thermal stability. The composites were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). Thermoregulation tests showed that the FPB with 45 % CO-PCM reduced peak surface temperatures by up to 6.8 degrees C during the day and retained 2.4 degrees C more heat at night, contributing to stable indoor thermal conditions. Energy simulations across four climate zones revealed that FPB-45 could reduce heating energy demand by up to 26 % compared to conventional expanded polystyrene (EPS) insulation. CO2 emission analysis indicated up to 10 kg/m2 annual reduction, and up to $1.80/m2 annual savings when using fuel oil, proving its technical and economic viability
CAM TAVANI ETKİLEYEN FAKTÖRLER
No full textBeşeri sermayenin doğru kullanımı, işletmelerin rekabet gücüne olumlu yönde tesir etmektedir. Çalışanları ile uyum içindeki işletmelerin hayat seyri, her zaman uzun ömürlü olacaktır. İşletme içinde adalet ve eşitlik algısının hakim olması ve çalışanlara ayrımcılık gözetmeksizin muamele edilmesiyle organizasyonel performans artışı beraberinde gelecektir. Bu çalışmada, kadın işgörenlerin önünde görünmeyen engeller olarak tanımlanan cam tavanın nedenleri ortaya konulmuştur. Cam tavan kavramıyla kadınların istihdamında özellikle dikey doğrultuda kariyer ilerleme fırsatlarının önündeki bariyerlere işaret edilmektedir. Kadın işgücünün kariyer sürecinde ortaya çıkan engel çeşitleri olarak bireysel engeller, örgütsel engeller ve toplumsal engeller söz konusudur. Bu makalenin amacı; işaret edilen faktörleri açıklamak ve cam tavana karşı izlenecek stratejileri ortaya koymaktır. Kadınların cam tavana maruz kaldıklarında aktif bir duruş takınmaları, iletişim ağlarından kopmamaları, sorunun çözümünde mücadele vermeleri, kararlı ve tutarlı hareket etmeleri, yeteneklerini göstermeleri cam tavanı yenmek için yapmaları gerekenler olarak değerlendirilmektedir
Dunite powder as a green precursor in one-part alkali-activated composites: Effects on mechanical and durability properties
No full textNatural pozzolans are a sustainable alternative to Portland cement, offering abundant alumina and reactive silica for geopolymer production. Due to their simple extraction methods, they are cost-effective and environmentally friendly. This study explores the utilization of dunite powder (DP) as a sustainable precursor in one-part alkali-activated slag-based composites (AAC), aiming to evaluate its potential to partially replace granulated blast furnace slag (GBFS). The mechanical, fresh, and durability properties of the composites were investigated by varying DP replacement levels (0%, 15%, 30%, and 60%) under an activator dosage of sodium metasilicate, with the mixtures cured at 80 degrees C for 24 h and subsequently exposed to ambient conditions. The compressive and flexural strengths were evaluated at 7, 28, and 91 days, while the fresh properties (flowability and setting time), durability under sulfate attack, high-temperature resistance, freeze-thaw resistance, dry shrinkage, sorptivity and microstructural characteristics (SEM, XRD, and FT-IR) were also examined. The compressive strength decreased with higher DP content, with the 60% DP mixture showing a 43% strength reduction at 28 days compared to the reference mixture. However, the 30% DP mixture achieved a favorable balance between strength and sustainability, demonstrating a compressive strength decrease of only 11% at 91 days. The mixture containing 15% DP demonstrated the best performance under high-temperature conditions and freeze-thaw cycles. The 60% DP mixture exhibited the highest mass and strength loss when exposed to temperatures above 400 degrees C and a 15% compressive strength reduction after 120 days of immersion in a 10% MgSO4 solution
Güncel sanatta “evin yokluğu”na bellek izinden bakış
No full textEv teması, sanat tarihinde sıkça karşımıza çıkan bir konudur. Sanat eserlerinde yer alan ev görünümleri, iç ve dış mekânları içeren peyzajlar veya sembolik-metaforik ifadelerle çeşitlilik kazanmaktadır. Güncel sanatta ise evlerin yok olma üzerine temellenen boyutu ile sanatçıların çalışma konuları içinde yer alması özellikle dikkat çekicidir. Güncel yaşam içindeki toplumsal düzenin değişmesi, yaşam koşullarının dönüşmesi, küreselleşme, göç ve yerinden edilmeler sebebiyle aidiyet-aidiyetsizlik, sosyal eşitsizlik gibi durumlar evin varlığı ve yokluğu sorgulamaları için zemin hazırlamıştır. Bu araştırmada amaç; güncel sanatta evin yokluğu üzerine çalışan sanatçıların sanat uygulamalarını incelemektir. Petrit Halilaj, Rachel Whiteread, Christian Boltanski ve Doris Salcedo’nun bir eseri seçilerek, bellek izleri ile “evin varlığı ve yokluğu” arasındaki anlamlar değerlendirilmiş ve çoklu anlam katmanlarına dikkat çekilmiştir. “Evin yokluğu”nu ifade eden bu çalışmalar, bellek ve anılarla kurulan ilişkiler ve hatırlatma mekânı özellikleri açısından incelenmiştir. Bu araştırma sanatçıların bireysel ve toplumsal deneyimlerden yola çıkarak, bellek aracılığıyla “evin yokluğu”nu somutlaştıran mekânlar yarattıklarını ya da var olan mekânları yok olan evler bağlamında kullandıklarını göstermektedir. Bu sanatçılar çalışmalarında “evin yokluğu” ile hafıza arasında bağlantı kurarken, doğrudan bir ilişki kurulmasını engelleyen dolaylı yansıtma yöntemlerini kullanmaktadırlar. Sanatçılara ait çalışmalar, evle ilgili hatıralar için hafıza mekânları işlevi görse de izleyiciler için sorgulamaya ve düşünmeye açık bir yol sunmaktadır
Detection of Water Level with Level Sensors in Bartin Stream and Its Branches and Its Integration to Flood Early Warning System
No full text9th International Symposium on Innovative Approaches in Smart Technologies, ISAS 2025 -- Gaziantep -- 211342Flash floods are a major threat to life and property. Various measures should be taken to minimize these losses. Flood early warning systems are one of these measures. In this study, ultrasonic and radar distance sensors were installed on the Bartin River and other tributaries feeding this river to detect water levels. With the data obtained from the installed level sensors, the changes in the water level in the riverbed are monitored instantaneously. The data obtained, together with meteorological forecasts, is fed into the hydrological model and warnings are generated 24-72 hours in advance. The knowledge of the water level rise in the regions outside the central settlement of the Bartin River enables the possibility of flooding in the central regions to be determined with a high degree of accuracy and the necessary measures to be taken. Each data station consumes about 30 Wh of energy. The energy capacity of each station is designed to be 960 Wh. This will allow the system to operate for long periods without sunlight. As part of this study, 32 level sensor stations have been installed on the Bartin River and its tributaries. The data obtained from these stations are sent via 4G modems to the central server established at Bartin University Kutlubey Campus. The data from the stations increases the accuracy of the early flood warning system. © 2025 Elsevier B.V., All rights reserved