
Bolu Abant İzzet Baysal University
UniversityBolu, Türkiye
Research output, citation impact, and the most-cited recent papers from Bolu Abant İzzet Baysal University (Türkiye). Aggregated across the NobleBlocks index of 300M+ scholarly works.
Top-cited papers from Bolu Abant İzzet Baysal University
In response to the 2013 Update of the European Strategy for Particle Physics, the Future Circular Collider (FCC) study was launched, as an international collaboration hosted by CERN. This study covers a highest-luminosity high-energy lepton collider (FCC-ee) and an energy-frontier hadron collider (FCC-hh), which could, successively, be installed in the same 100 km tunnel. The scientific capabilities of the integrated FCC programme would serve the worldwide community throughout the 21st century. The FCC study also investigates an LHC energy upgrade, using FCC-hh technology. This document constitutes the second volume of the FCC Conceptual Design Report, devoted to the electron-positron collider FCC-ee. After summarizing the physics discovery opportunities, it presents the accelerator design, performance reach, a staged operation scenario, the underlying technologies, civil engineering, technical infrastructure, and an implementation plan. FCC-ee can be built with today's technology. Most of the FCC-ee infrastructure could be reused for FCC-hh. Combining concepts from past and present lepton colliders and adding a few novel elements, the FCC-ee design promises outstandingly high luminosity. This will make the FCC-ee a unique precision instrument to study the heaviest known particles (Z, W and H bosons and the top quark), offering great direct and indirect sensitivity to new physics.
With the development of molecular marker technology in the 1980s, the fate of plant breeding has changed. Different types of molecular markers have been developed and advancement in sequencing technologies has geared crop improvement. To explore the knowledge about molecular markers, several reviews have been published in the last three decades; however, all these reviews were meant for researchers with advanced knowledge of molecular genetics. This review is intended to be a synopsis of recent developments in molecular markers and their applications in plant breeding and is devoted to early researchers with a little or no knowledge of molecular markers. The progress made in molecular plant breeding, genetics, genomic selection and genome editing has contributed to a more comprehensive understanding of molecular markers and provided deeper insights into the diversity available for crops and greatly complemented breeding stratagems. Genotyping-by-sequencing and association mapping based on next-generation sequencing technologies have facilitated the identification of novel genetic markers for complex and unstructured populations. Altogether, the history, the types of markers, their application in plant sciences and breeding, and some recent advancements in genomic selection and genome editing are discussed.
Fiber reinforced polymer (FRP) composite materials are heterogeneous and anisotropic materials that do not exhibit plastic deformation. They have been used in a wide range of contemporary applications particularly in space and aviation, automotive, maritime and manufacturing of sports equipment. Carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer (GFRP) composite materials, among other fiber reinforced materials, have been increasingly replacing conventional materials with their excellent strength and low specific weight properties. Their manufacturability in varying combinations with customized strength properties, also their high fatigue, toughness and high temperature wear and oxidation resistance capabilities render these materials an excellent choice in engineering applications. In the present review study, a literature survey was conducted on the machinability properties and related approaches for CFRP and GFRP composite materials. As in the machining of all anisotropic and heterogeneous materials, failure mechanisms were also reported in the machining of CFRP and GFRP materials with both conventional and modern manufacturing methods and the results of these studies were obtained by use of variance analysis (ANOVA), artificial neural networks (ANN) model, fuzzy inference system (FIS), harmony search (HS) algorithm, genetic algorithm (GA), Taguchi's optimization technique, multi-criteria optimization, analytical modeling, stress analysis, finite elements method (FEM), data analysis, and linear regression technique. Failure mechanisms and surface quality is discussed with the help of optical and scanning electron microscopy, and profilometry. ANOVA, GA, FEM, etc. are used to analyze and generate predictive models.
Purpose The purpose of this paper is to explore the impact of eight dimensions of green supply chain management (GSCM) on economic, environmental and social performance, which are the three dimensions of corporate sustainability. The eight dimensions covered in this study are: green purchasing, green manufacturing, green distribution, green packaging, green marketing, environmental education, internal environmental management and investment recovery. Design/methodology/approach The relationships between dimensions of GSCM and sustainability performance are tested by using a plant-level survey. A proposed research model and hypotheses are tested by using cross-sectional face-to-face and e-mail survey data collected from manufacturing firms in Turkey. Structural equation modeling is used to test the proposed hypotheses. Findings Except for green purchasing, all GSCM dimensions are found to be related with at least one of the performance dimensions. Practical implications The results are important in highlighting the importance of GSCM in improving sustainability performance. Originality/value This paper enhances the understanding of the relationship between different dimensions of GSCM and the three sustainability performance factors. While there are very few studies examining the relationship between GSCM and corporate sustainability, this study is important in terms of exploring the effects of dimensions of GSCM applications on economic, environmental and social performance one by one, by examining these applications in the form of eight dimensions.
Abstract: We review the physics opportunities of the Future Circular Collider, covering its e+e-, pp, ep and heavy ion programmes. We describe the measurement capabilities of each FCC component, addressing the study of electroweak, Higgs and strong interactions, the top quark and flavour, as well as phenomena beyond the Standard Model. We highlight the synergy and complementarity of the different colliders, which will contribute to a uniquely coherent and ambitious research programme, providing an unmatchable combination of precision and sensitivity to new physics.
Abstract: In response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC study covered an energy-frontier hadron collider (FCC-hh), a highest-luminosity high-energy lepton collider (FCC-ee), the corresponding 100 km tunnel infrastructure, as well as the physics opportunities of these two colliders, and a high-energy LHC, based on FCC-hh technology. This document constitutes the third volume of the FCC Conceptual Design Report, devoted to the hadron collider FCC-hh. It summarizes the FCC-hh physics discovery opportunities, presents the FCC-hh accelerator design, performance reach, and staged operation plan, discusses the underlying technologies, the civil engineering and technical infrastructure, and also sketches a possible implementation. Combining ingredients from the Large Hadron Collider (LHC), the high-luminosity LHC upgrade and adding novel technologies and approaches, the FCC-hh design aims at significantly extending the energy frontier to 100 TeV. Its unprecedented centre of-mass collision energy will make the FCC-hh a unique instrument to explore physics beyond the Standard Model, offering great direct sensitivity to new physics and discoveries.
The increased environmental awareness and tighter regulatory standards have prompted various industries to seek appropriate wastewater treatment technologies, in particular, for colored wastewater. This review provides detailed information on dyes, their classification, the environmental impact of water pollution on the national (Morocco) and international scales. Recent studies about the adsorption treatment process for the removal of dyes from the aqueous solution with different adsorbents recognized as a sustainable solution in terms of minimization, recovery, and reuse were evaluated. It is also aimed to synthesize the current literature data concerning low-cost adsorbents by systematically highlighting both their characteristics and capacities. Moreover, the applicability of various kinetic adsorption and isothermal models to the removal of dyes by a wide range of adsorbents is reported in addition to information regarding continuous system adsorption.
Firms are facing growing pressure to become “greener” or more environmentally friendly. Consequently, firms have had to review their production processes as a result of pressures from the community and governments. This pilot study investigated the influence of green manufacturing and eco-innovation on corporate sustainability performance (economic, environmental, and social). Data were collected through a questionnaire-based survey across 53 companies from automotive, chemistry and electronic sectors in Turkey. The empirical model was tested using regression analysis, to verify the hypothetical relationships of the study. The results of this study indicate that the green manufacturing applications have a significant positive impact on environmental performance and social performance. Additionally, eco-process innovation has a significant positive impact on corporate sustainability. However, eco-product innovation was not found to have a significant effect on any of the three types of performance.
Colloidal nanoplatelets (NPLs) have recently emerged as favorable light-emitting materials, which also show great potential as optical gain media due to their remarkable optical properties. In this work, we systematically investigate the optical gain performance of CdSe core and CdSe/CdS core/crown NPLs having different CdS crown size with one- and two-photon absorption pumping. The core/crown NPLs exhibit enhanced gain performance as compared to the core-only NPLs due to increased absorption cross section and the efficient interexciton funneling, which is from the CdS crown to the CdSe core. One- and two-photon absorption pumped amplified spontaneous emission thresholds are found as low as 41 μJ/cm(2) and 4.48 mJ/cm(2), respectively. These thresholds surpass the best reported optical gain performance of the state-of-the-art colloidal nanocrystals (i.e., quantum dots, nanorods, etc.) emitting in the same spectral range as the NPLs. Moreover, gain coefficient of the NPLs is measured as high as 650 cm(-1), which is 4-fold larger than the best reported gain coefficient of the colloidal quantum dots. Finally, we demonstrate a two-photon absorption pumped vertical cavity surface emitting laser of the NPLs with a lasing threshold as low as 2.49 mJ/cm(2). These excellent results are attributed to the superior properties of the NPLs as optical gain media.
Water shortages and soil water losses due to environmental change and land use change are challenges to maize production. An experiment was conducted to investigate the physiological responses of the maize (Zea mays L.) cultivars Doge, Vero and Luce to drought conditions. Drought stress was imposed on the plants 12 days after sowing by withholding irrigation for 12 days and then rewatering for 6 days. Growth of all cultivars was retarded under drought stress conditions and regained speed during the recovery stage. RWC decreased in all cultivars by drought and reached the control values during the recovery period. Fresh and dry biomass of the cultivars significantly decreased in all cultivars. Drought affected the minimum fluorescence (Fo) of all cultivars, but a significant effect was only found in Doge. Drought also caused decreases in FM, FV/FM, FV′/FM′, ϕPSII and qL; and an increase of non-photochemical quenching (NPQ), but those returned to control values during the recovery stage in all three cultivars. Chlorophyll (chl) a, chl b, total chl (a + b) and carotenoid contents of all maize cultivars were significantly reduced under drought, but a recovery was observed following rewatering. Anthocyanin and proline contents increased in all cultivars. Although Doge was affected from drought more than the other cultivars, it could probably withstand drought with better upregulating its protective mechanisms. As a result of that Doge was classified as less drought tolerant, but others as tolerant.
Spiritual Change (SC) is one of 5 domains of posttraumatic growth (PTG). The current Posttraumatic Growth Inventory (PTGI) assesses this area of growth with only 2 items, one focusing on religiosity and the other focusing on spiritual understanding. The addition of 4 newly developed spiritual-existential change (SEC) items, creating an expanded PTGI (Posttraumatic Growth Inventory-X), reflects a diversity of perspectives on spiritual-existential experiences that are represented in different cultures. Samples were obtained from 3 countries: the United States (n = 250), Turkey (n = 502), and Japan (n = 314). Analyses indicated that the newly added items capture additional experiences of growth outside traditional religious concepts, yet still are correlated with the original SC items, especially in the U.S. and Turkish samples. Relationships of the PTGI-X to established predictors of PTG, event-related rumination, and core beliefs, were as predicted in all 3 countries. The new 6-item SEC factor demonstrated high internal reliability, and the 5-factor structure of the expanded scale was supported by confirmatory factor analysis. The resulting 25-item PTGI-X can be used as a validated instrument in a wide range of samples in which traditional religious beliefs are less dominant.
STUDY DESIGN: Thirty-six consecutive patients with histologically confirmed spinal cord meningioma were presented to evaluate clinical, diagnostic, therapeutic options and to correlate treatment methods and outcome. OBJECTIVE: To present the incidence, clinical presentation, localization, techniques, and long term results of surgically treated spinal meningiomas. SUMMARY OF BACKGROUND DATA: Meningiomas are common tumors of spinal neoplasm. They are generally benign and slow-growing. Advanced in radiologic and surgical techniques have brought about better surgical results. The goal of surgical treatment must be total resection if possible. However, spinal meningiomas may recur, especially as a result of incomplete resection. METHODS: Thirty-six consecutive patients with histologically confirmed spinal meningiomas were treated from 1980 to 1997. Neuroradiological diagnosis was made through myelogram in 20 patients, CT scan in 15 patients, and MRI in 16 patients. All patients were operated on via the posterior approach and using microsurgical technique and when necessary Cooper-Ultrasonic surgical aspirator (CUSA) and CO2 laser were also applied. The patients were followed for 2 to 15 years (mean 9 years). Radiotherapy was not undertaken except in recurrent tumors. RESULTS: The most frequent site of spinal meningiomas was in the thoracic region. In 30 (83%) patients tumors were found to be completely intradural extramedullary during surgery. Total tumor resection was achieved in 35 (97%) of patients. In the follow-up period, 30 cases (83%) improved when compared to their preoperative conditions. There was one operative mortality (3%). A 66-year-old women died of pulmonary emboli. CONCLUSIONS: Magnetic resonance imaging is the best imaging technique for diagnosis. Total tumor resection improved the surgical results of spinal meningiomas. If total removal of the tumor cannot be achieved, or in the case of early recurrence followed by total resection, radiotherapy should be performed in adjuvant therapy.
Nanoliposomes are microscopic vesicles composed of phospholipid bilayers entrapping one or more aqueous compartments. Their unique properties have triggered numerous applications in several scientific and technological fields. Nanoliposomes can provide controlled release of various bioactive agents, including food ingredients and nutraceuticals, at the right place and the right time. Therefore, they increase the effectiveness and cellular uptake of the encapsulated material. Reactive, sensitive, or volatile additives (vitamins, enzymes, antioxidants, slimming agents, etc.) can be turned into stable ingredients using nanoliposomes. This article reviews various aspects of nanoliposomes including currently available preparation methods, and their application in food technology.
BACKGROUND: Cadmium (Cd) is well known as one of the most toxic metals affecting the environment and can severely restrict plant growth and development. In this study, Cd toxicities were studied in strawberry cv. Camarosa using pot experiment. Chlorophyll and malondialdehyde (MDA) contents, catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX) activities and mineral nutrient concentrations were investigated in both roots and leaves of strawberry plant after exposure Cd. RESULTS: Cd content in both roots and leaves was increased with the application of increasing concentrations of Cd. We found higher Cd concentration in roots rather than in leaves. Chlorophyll a and b was decreased in leaves but MDA significantly increased under increased Cd concentration treatments in both roots and leaves. SOD and CAT activities was also increased with the increase Cd concentrations. K, Mn and Mg concentrations were found higher in leaves than roots under Cd stress. In general, increased Cd treatments increased K, Mg, Fe, Ca, Cu and Zn concentration in both roots and leaves. Excessive Cd treatments reduced chlorophyll contents, increased antioxidant enzyme activities and changes in plant nutrition concentrations in both roots and leaves. CONCLUSION: The results presented in this work suggested that Cd treatments have negative effect on chlorophyll content and nearly decreased 30% of plant growth in strawberry. Strawberry roots accumulated higher Cd than leaves. We found that MDA and antioxidant enzyme (CAT, SOD and APX) contents may have considered a good indicator in determining Cd tolerance in strawberry plant.
Abstract In order to trace how mobile assisted language learning (MALL) has evolved in recent years, we analysed studies published from 2000 to 2012 to examine their characteristics and research trends. These studies were published in international journals listed in the Social Sciences Citation Index (SSCI). Sixty-nine studies that fit the time frame and study parameters were examined using a classification form. The results indicate that research in the field increased at a fast pace from 2008 and reached a peak in 2012. Teaching vocabulary with the use of cell phones and PDAs has remained popular over this period. A significant number of studies did not base their research on any theoretical framework. Applied and design-based research dominated the field, and these studies generally adopted quantitative research methods. Reflecting on these results, we suggest directions for future research and practices in the field.
AIM: To evaluate the antibacterial effect of curcumin with the minimum inhibitory concentration (MIC) method in standard bacterial strains. METHODS: The in vitro antibacterial activity of curcumin was evaluated against methicillin-sensitive Staphylococcus aureus (MSSA) (ATCC 29213), methicillin-resistant Staphylococcus aureus (MRSA) (ATCC 43300), Enterococcus faecalis (ATCC 29212), Bacillus subtilis (ATCC 6633), Pseudomonas aeruginosa (ATCC 27853), Escherichia coli (ATCC 25922) and Klebsiella pneumoniae (ATCC 700603) using the macrodilution broth susceptibility test method. After incubation in tubes, the antibacterial activity of curcumin was detected by a lack of turbidity, which indicated the inhibition of bacterial growth. The concentration in the tube with the highest dilution showing no turbidity was defined as the MIC. RESULTS: The curcumin MIC values were 175 µg/ml, 129 µg/ml, 219 µg/ml, 217 µg/ml, 163 µg/ml, 293 µg/ml and 216 µg/ml against P. aeruginosa, B. subtilis, MSSA, MRSA, E. coli, E. faecalis and K. Pneumonia, respectively. CONCLUSION: This study revealed antibacterial effects of curcumin against standard bacterial strains in high concentrations. Animal experiments have demonstrated that curcumin applied at high doses has strong antibacterial activity. There is a need for further in vivo studies to shed light on antibacterial effects of curcumin with high concentrations.
During the last decade, consumers’ approach to healthy foods has changed dramatically, and today enhancing the health span of consumers through consumption of healthy food is more important than simply enhancing their life span. Rising medical costs are the prime factor forcing people to find cheaper and effective means of protecting their health. This fact has led to an increase in consumers’ interest in functional foods. Dairy products occupy a significant space in the functional foods market and dairy‐based functional beverages are a growing segment of this sector. This article reviews recent scientific, technological and commercial developments in the functional dairy‐based beverage sector.
Spatial thinking is essential for scientific thought; it is used to represent and manipulate information in learning and problem solving (Clements & Battista, 1992). It is also required in many intellectual endeavors such as solving problems in engineering, design, physics and mathematics (Smith, 1964; Pellegrino, Alderton & Shute, 1984). Enhancing students' spatial abilities is one of roles of geometric activities. The National Council of Teachers of Mathematics recommends the mathematics curriculum for grade 58 should include study of geometry of one, two, and three dimensions in a variety of situations, so that students can visualize and represent geometric figures with special attention to developing spatial sense (NCTM, 1989). However, such is not case. Current geometry curricula do not provide enough opportunities for development of spatial ability (Usiskin, 1987). Moreover, in many schools geometry is delayed until end of school year (Hoffer & Hoffer, 1992) or eliminated (Porter, 1989).
This article examines the effects of servant leadership behaviours of primary school principals on teacher job satisfaction. The population of this study is 29 primary schools in Düzce, Turkey. Data were collected from 595 teachers working in primary schools in Düzce province of Turkey. Servant leadership behaviours of principals were determined with the servant leadership scale developed by Laub (1999) while teacher job satisfaction was determined using the job satisfaction scale developed by Mohrman et al. (1977). Mean, standard deviation, correlation and multi-regression test was used in data analysis. Strong positive relationship was revealed between servant leadership behaviours of school principals and teachers’ job satisfaction and servant leadership was a significant predictor of teacher job satisfaction.
BACKGROUND: The sit and reach test is the most common flexibility test used in health related fitness test batteries. OBJECTIVE: To examine and compare three different sit and reach tests as a measure of hamstring flexibility in 102 female students. METHOD: The traditional sit and reach test, the chair sit and reach test, the back saver sit and reach test, and passive straight leg raise were administered in three trials to all 102 students (mean (SD) age 22 (1) years) on the same day. RESULTS: A Pearson correlation coefficient analysis was significant (p<0.01) for the traditional sit and reach test with back saver sit and reach test and flexibility of hamstrings (r = 0.45 and 0.65 for left and right legs, and 0.63 and 0.53 for left and right legs respectively). Also, the back saver sit and reach test for the left (p<0.01) and right (p<0.05) leg was significantly associated with hamstring flexibility (r = 0.37 and 0.25 for the left leg and 0.50 and 0.44 for the right leg respectively). CONCLUSION: The results indicate that the back saver sit and reach test produces reasonably accurate and stable measures of hamstring flexibility. Moreover, it appears that this test is a safe and acceptable alternative to the traditional and chair sit and reach tests as a measure of hamstring flexibility in young women.