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Copyright of Journal of Anesthesia / Anestezi Dergisi (JARSS) is the property of Logos Medical Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Turkish Studies - Language & Literature is the property of Electronic Turkish Studies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Nursology is the property of Ataturk University Coordinatorship of Scientific Journals and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper proposes an extended state observer (ESO)‐based second‐order sliding mode control (SMC) for dynamic voltage restorers (DVRs). Unlike the conventional first‐order SMC and some second‐order SMC (SOSMC) methods that suffer from chattering, the proposed control method can alleviate chattering and achieve finite‐time convergence. Chattering suppression (i.e. eliminating discontinuities) is achieved via continuous control input which is also used to generate the pulse width modulation signals. However, while removing the discontinuities in the control input, the performance of the control method is degraded when it is subjected to disturbances. Therefore, an active disturbance rejection (ADR) based on an ESO is proposed to enhance the performance. In addition, an advanced single‐phase phase‐locked loop (PLL) using linear observer and quasi‐type‐1 PLL is also proposed. The effectiveness of the proposed method is verified through simulation and experimental results which are compared with the results of the existing SMC methods applied to DVR. [ABSTRACT FROM AUTHOR]

A plethora of research emphasizes the importance of performance feedback as an adaptive way to improve the outcomes of undergraduate students. However, research on negative performance feedback (i.e. communicating the results of a critical assessment related to student performance) and the potential unintended negative consequences remains fragmented and non-comprehensive. The current systematic review provides an integrative synthesis of the literature that details the unintended negative consequences of negative performance feedback on undergraduate students. It also identifies the contexts in which these consequences are more likely to occur. Using the 36 articles that fit the study's search criteria, we found negative effects on self-efficacy, cognition, affect, and behavior. These factors were moderated by the characteristics of the feedback provider and the feedback receiver, the feedback style, and demographic variables. Based on our review, we propose a new integrative model. This study contributes to the literature and practice of teaching and learning by providing educators with an up-to-date review of negative feedback. It also provides a multidisciplinary examination and identifies future research directions. [ABSTRACT FROM AUTHOR]

Fibers which are used to increase the tensile strength of cementitious systems adversely affect the fluidity by making the mixture more cohesive. The effect of fiber type and utilization rate on the rheological and thixotropic characteristics of cementitious systems was a topic covered in the current study. For this, mortar mixtures containing polypropylene, polyamide (PA), and basalt fibers with a 6 mm length were created in three different ratios (0.25%, 0.50%, and 0.75%). According to results, PA- and basalt fiber-containing mixtures showed the best and worst performances, in terms of flowability performance, respectively. In fiber mixes including basalt, the maximum dynamic yield stress (DYS) value was identified. The use of high-range water-reducing admixtures and an increase in the water/cement ratio were shown to result in a drop in the values of DYS, apparent viscosity, the Herschel–Buckley Index, and structural recovery area. It was discovered that fibrous mixtures had a larger structural recovery (anti-thixotropic) area than fiber-free ones. [ABSTRACT FROM AUTHOR]

Concrete, an indispensable cornerstone of the construction industry, presents a formidable environmental challenge owing to the substantial carbon dioxide (CO2) emissions incurred during the production of cement. However, in light of the construction sector's vital economic and social contributions, it becomes imperative to harmonize it with environmental preservation. The concept of sustainability emerges as a paramount principle, addressing pressing issues such as the escalating depletion of non-renewable resources and the imperative need for resource conservation to secure a sustainable legacy for future generations. In this particular context, the prudent utilization of sustainable materials stands out as a pragmatic approach to ameliorate the adverse environmental impacts inherent in cementitious systems, while concurrently enhancing the structural strength and durability of constructions. The subject of this study is centered on the strategic incorporation of recycled concrete powder (RCP), marble powder (MP), glass powder (GP), and limestone powder (LP) as viable substitutes for traditional cement, at varying rates of 25%, 30%, and 35%, with the overarching goal of augmenting sustainability in construction practices. The outcomes of the experimental investigation unveiled significant insights. The inclusion of these waste powders yielded a noteworthy maximum reduction of 44% in compressive strength, albeit it necessitated a maximum increase of 16% in the application of admixtures. Nevertheless, a crucial advantage emerged in the substantial reduction, to the tune of 72%, in the deleterious alkali–silica reaction. Moreover, in terms of workability, while the control mixture experienced a 20% reduction in flow value after 60 min, mixtures infused with waste powders showcased a range of flow value reductions spanning from 23 to 40%. In summary, the study emphasizes that the replacement of conventional cement with waste powders, despite causing acceptable adverse effects on workability, admixture requirements, and strength properties, leads to significant enhancements in alkali-silica reaction resistance. This, in turn, bestows substantive benefits upon the overarching goal of sustainability enhancement within the construction industry. [ABSTRACT FROM AUTHOR]

In this study, we use discrete Appell convolution to define the sequence of Laguerre type twice-iterated Appell polynomials. We obtain explicit representation, recurrence relation, determinantal representation, lowering operator, integro-partial raising operator and integro-partial differential equation. In addition, the special cases of this new family are investigated using Euler and Bernoulli numbers. We also state their corresponding characteristic properties. [ABSTRACT FROM AUTHOR]

Brucellosis is a widespread zoonotic disease of veterinary and public health importance with considerably higher prevalence in developing/underdeveloped countries. This study reports the prevalence and risk determinants of brucellosis in small ruminants of peri-urban and rural areas of district Multan, Southern Punjab, Pakistan. For this purpose, sera samples (n = 392) of small ruminants were collected and subjected to preliminary screening using commercially available RBPT reagents followed by serodetection of brucellosis using multispecies i-ELISA kit (ID.vet, France). All the ELISA positive samples were confirmed by PCR using genus-specific primers, and frequencies of Brucella species in positive samples were enumerated using species-specific primers. Results indicated seropositivity rates of 9.69, 9.95, and 10.20% in study population using RBPT reagents of IDEXX-USA, ID.Vet-France, and VRI-Pakistan, respectively, with a statistically nonsignificant difference p > 0.05 . Results of ELISA showed an overall seroprevalence rate of 7.14% in target population with a slightly higher rate in sheep (7.65%) as compared to goat (6.63%) population (p = 0.695 ; OR = 1.16, 95% CI = 0.53, 2.57). Results revealed that out of total positive samples, B. abortus was detected in 60.71% of seropositive samples and B. melitensis was detected in 14.28% of positive samples. It was revealed that risk factors including body condition scores, hygienic conditions of the housing facility, farming system, reproductive disorders, educational status of farmers, and awareness of farmers about brucellosis had significant association with brucellosis in small ruminants of study area p < 0.05 . Conversely, farm/herd size, locality, gender, age, weight, and parity showed a nonsignificant association p > 0.05 with brucellosis. In conclusion, brucellosis is prevalent in small ruminants of Multan, Pakistan. It is recommended to devise and implement effective control strategies with a major focus on raising awareness about brucellosis in farmers for the containment of infection in the region. [ABSTRACT FROM AUTHOR]

Introduction: With aging of population, frailty and sarcopenia have become very important issues. Therefore, we aimed to evaluate patients for frailty and sarcopenia preoperatively who aged 65≤ underwent elective surgical operation in university hospital and search complications intraoperatively and postoperatively. Materials and Method: This prospective, cross-sectional study performed between November 2021 and May 2022 at university hospital and patients aged 65 years and older underwent elective surgery included. Patients scored with frailty index. Both thickness and cross-sectional area of rectus femoris muscle were measured by ultrasound for evaluating sarcopenia in all patients, preoperatively. Anesthetic management, surgical risks were determined. Intraoperative and postoperative complications recorded. Results: Totally 1112 patients were assessed and 279 patients were included. According to the cross-sectional area 35.5%; according to rectus femoris thickness 32.2% and according to both of them 25.4% were detected as sarcopenia. While fragility was detected in 151(54.7%) patients which 112(74.2%) pre-frail, 39(25.8%) fragile. 176(63.8%) patients experienced intraoperative complications. Postoperative complications were detected in 115(41.7%). The sarcopenia, frailty, and higher surgical risk classifications are increased intraoperative and postoperative complications (4.7, 4.1, 4 and 3.7, 6.4, 3.9 fold, respectively). Length of stay hospital (6.5 and 5 days) and intensive care unit (21 and 19 days), intraoperative (91.4% and 100%) and postoperative complication (81.4% and 87.2%) was higher sarcopenia and frailty (p<0.001). Conclusion: Intraoperative and postoperative complications were observed higher in frail and sarcopenic patients. Evaluation of frailty and sarcopenia in over 65 years at preoperative period can be helpful for prediction to risk of intraoperative and postoperative complications. [ABSTRACT FROM AUTHOR]

In this paper, we introduce general sequence of twice-iterated Δw -(degenerate) Gould–Hopper Appell polynomials (TI-DGHAP) via discrete Δw -Gould–Hopper Appell convolution. We obtain some of their characteristic properties such as explicit representation, determinantal representation, recurrence relation, lowering operator (LO), raising operator (RO), difference equation (DE), integro-partial lowering operator (IPLO), integro-partial raising operator (IPRO) and integro-partial difference equation (IPDE). As special cases of these general polynomials, we present TI degenerate Gould–Hopper Bernoulli polynomials, TI degenerate Gould–Hopper Poisson–Charlier polynomials, TI degenerate Gould–Hopper Boole polynomials and TI degenerate Gould–Hopper Poisson–Charlier–Boole polynomials. We also state their corresponding characteristic properties. [ABSTRACT FROM AUTHOR]

In this study, it is aimed to examine the relationship between emotional reactivity, depression, anxiety and stress in elite athletes, considering that psychological qualities such as emotional reactivity and anxiety observed in athletes due to the heavy preparation conditions inherent in sports and the recent breaks in sports may increase the risk of psycho-social disorders. In this descriptive study, the relational survey model was used. The study group of the research consisted of a total of 209 elite level athletes, 59 women and 150 men, in different branches. As a data collection tool; "Emotional Responsiveness Scale" and "Turkish Short Form of Depression Anxiety Stress Scale (Dass 21)" were used. As a result of the study, there were significant differences between the emotional reactivity and depression, anxiety, and stress levels of the athletes involved in team sports compared to the athletes involved in individual sports, according to the sports branch. However, it has been determined that there is a positive and highly significant relationship between the emotional reactivity of the athletes and their depression, anxiety, and stress levels. As a result, considering the strong relationship between emotional reactivity and psychological adjustment skills, it is important to take protective measures in both social and professional lives of athletes for this concept, as an increase in the level of emotional reactivity may have positive relations with some psychological adjustment skills. [ABSTRACT FROM AUTHOR]

In this study the effect of fiber type and utilization ratio on the dimensional stability and durability properties of pavement mortar mixtures was investigated. Three different fibers that are 12 mm long polypropylene, polyamide, and basalt fiber were used at a ratio of 0.25%, 0.50%, 0.75%, and 1% of their total volume. Drying-shrinkage, alkali-silica reaction (ASR), sulfate, freeze-thaw, and abrasion resistance of the mixtures were investigated. The findings to emerge from this study are as in the following: first, fiber addition prevented crack growth due to drying shrinkage of cementitious systems. Second, mixtures containing fiber showed higher performance in ASR and freeze-thaw whereas they underperformed in terms of sulfate resistance. These results could be attributed to a dual mechanism; on the one hand, the use of fiber is considered to create an additional void for the products that have the potential to form expansion to escape. On the other hand, the permeability of the mixtures increases as the void volume does due to the use of fiber. The former mechanism is considered to be predominant in ASR and freeze-thaw states. Specifically, mixtures containing basalt fiber with the highest modulus of elasticity outperformed in all properties. [ABSTRACT FROM AUTHOR]

Copyright of Firat Tip Dergisi is the property of Firat University, Faculty of Medicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Lynch syndrome is one of the most common hereditary cancer sensitivity syndromes and is caused by autosomal-dominant germline mutations in DNA mismatch repair genes. In patients affected by this syndrome, pre-implantation genetic testing for monogenic disorders (PGT-M) could be the elective technique used to prevent the transmission of this hereditary syndrome to offspring. Notably, despite the severity of the condition, some authors have observed a markedly lower demand for PGT-M in these patients compared to those with other hereditary conditions. A 34-year-old woman with a medical history of Lynch syndrome associated with endometrial cancer came to the Villa Mafalda fertility center in Rome in order to conceive a healthy baby. In a pre-implantation genetic testing for aneuploidy (PGT-A) + PGT-M cycle, eight blastocysts were formed. Six out of eight blastocysts were affected by the same mother syndrome. One of the other two was aneuploid and the other one was a mosaic embryo, which resulted in a healthy pregnancy. The aim of this report is to emphasize the importance of a multidisciplinary approach to managing patients with this condition. In vitro fertilization (IVF), specifically PGT-M, is a tool that allow patients to conceive biological children with lower risk of inheriting the disease. [ABSTRACT FROM AUTHOR]

In this study the effect of fiber type and utilization ratio on the dimensional stability and durability properties of pavement mortar mixtures was investigated. Three different fibers that are 12 mm long polypropylene, polyamide, and basalt fiber were used at a ratio of 0.25%, 0.50%, 0.75%, and 1% of their total volume. Drying-shrinkage, alkali-silica reaction (ASR), sulfate, freeze-thaw, and abrasion resistance of the mixtures were investigated. The findings to emerge from this study are as in the following: first, fiber addition prevented crack growth due to drying shrinkage of cementitious systems. Second, mixtures containing fiber showed higher performance in ASR and freeze-thaw whereas they underperformed in terms of sulfate resistance. These results could be attributed to a dual mechanism; on the one hand, the use of fiber is considered to create an additional void for the products that have the potential to form expansion to escape. On the other hand, the permeability of the mixtures increases as the void volume does due to the use of fiber. The former mechanism is considered to be predominant in ASR and freeze-thaw states. Specifically, mixtures containing basalt fiber with the highest modulus of elasticity outperformed in all properties. [ABSTRACT FROM AUTHOR]

In this study, it was aimed to determine the optimum fiber type and usage ratio by examining the effect of fiber type and usage rate on the properties of mortar mixtures exposed to high temperatures such as 300°C, 450°C, and 600°C. For this purpose, mixtures were prepared by substituting polypropylene (PP), polyamide (PA) and basalt (B) fibers in proportions as 0.25%, 0.50%, 0.75%, and 1% instead of aggregate. Unit weight, compressive‐flexural strength, ultrasonic pulse velocity (UPV), and permeability properties of mixtures were determined. Regardless of fiber type, flexural strength and permeability increased, UPV decreased with the addition of fiber. Basalt fiber mixtures exhibited the highest performance in terms of flexural strength. PP fiber mixtures exhibited the best performance in terms of permeability, ultrasonic pulse velocity and dynamic modulus of elasticity. SEM analyzes showed that PP fibers exposed to 600°C melted, leading to the formation of channel voids. According to TGA result, approximately 15% mass loss was observed in the control sample at 600°C. [ABSTRACT FROM AUTHOR]

Background: Ultrasound-guided erector spinae plane block (ESPB) is an interfascial plane block used for analgesia of the chest and abdominal wall. This study aimed to evaluate the perioperative analgesic efficacy of bilateral single-shot ESPB at T5 vertebral level in breast reduction surgery. Materials and Methods: Sixty adult female patients scheduled for breast reduction surgery were included and randomly allocated to two groups to receive either preoperative ESPB with a local anesthetic mixture of 10 mL 0.5% bupivacaine, 5 mL 2% lidocaine, and 5 mL saline, or sham block. Patients in both groups received intraoperative remifentanil infusion and, postoperatively, morphine via the patient-controlled analgesia (PCA) device. The primary outcome was 24-h total morphine consumption, and secondary outcomes included intraoperative opioid consumption, postoperative pain intensity, time to first PCA request, supplement analgesic requirements, functional recovery, patient satisfaction, length of hospital stay, and side effects and complications. Results: The 24-h total morphine consumption was significantly lower in the ESPB group vs. the sham group (mean ± SD, 6.7 ± 3.9, and 13.9 ± 5.7 mg, respectively, p < 0.001). Compared with sham block, ESPB reduced pain scores, intraoperative opioid consumption, supplement analgesic requirements, delayed time to first PCA request, and improved functional recovery and patient satisfaction. Conclusion: In breast reduction surgery, preoperative single-shot ESPB reduces perioperative opioid consumption and provides adequate pain relief within 24 h postoperatively compared to systemic analgesics alone. Trial Registration Number: NCT03621345 Level of Evidence II: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266. [ABSTRACT FROM AUTHOR]

Copyright of E-International Journal of Educational Research is the property of E-International Journal of Educational Research and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objectives: Cardiac surgery with cardiopulmonary bypass is a primary activator of the systemic inflammatory response syndrome (SIRS). To assess the association of SIRS with intraoperative variables and early postoperative outcomes, we compared SIRS incidence after cardiac surgery between cyanotic and acyanotic children. Methods: Using binary logistic regression models, we evaluated the incidence of SIRS between cyanotic and acyanotic children and the effect of intraoperative variables on SIRS occurrence and the effects of SIRS on postoperative complications. Results: A total of 175 children (69 cyanotic, 106 acyanotic) were included. Based on Mantel–Haenszel–Cochran analysis, considering the Risk Adjusted Classification for Congenital Heart Surgery score, the SIRS rate was higher at operation end in cyanotic children (p<0.001; 95% confidence interval: 1.94–10.61). An association was detected between SIRS incidence and consumption of red blood cells intraoperatively and fresh frozen plasma postoperatively. Lactate levels were higher in cyanotic than in acyanotic children at the end of the operation and at the postoperative 6th and 24th hours (p=0.008, 0.007, and 0.016, respectively). Lactate levels were higher in cyanotic children diagnosed with SIRS than in acyanotic children without SIRS at the end of the operation and the 6th postoperative hour (p=0.024 and 0.011, respectively). Vasoactive inotropic scores were higher in children with SIRS in the 6th and 24th postoperative hours (p=0.018 and 0.029, respectively). Conclusion: The incidence of SIRS is higher in children with complex cyanotic heart disease. Perioperative consumption of blood products increases SIRS occurrence. [ABSTRACT FROM AUTHOR]

Copyright of Turkiye Klinikleri Journal of Dental Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective: Genomics Quality Assessment has provided external quality assessments (EQAs) for preimplantation genetic testing (PGT) for 12 years for eight monogenic diseases to identify sub‐optimal PGT strategies, testing and reporting of results, which can be shared with the genomics community to aid optimised standards of PGT services for couples. Method: The EQAs were provided in two stages to mimic end‐to‐end protocols. Stage 1 involved DNA feasibility testing of a couple undergoing PGT and affected proband. Participants were required to report genotyping results and outline their embryo testing strategy. Lymphoblasts were distributed for mock embryo testing for stage 2. Submitted clinical reports and haplotyping results were assessed against peer‐ratified criteria. Performance was monitored to identify poor performance. Results: The most common testing methodology was short tandem repeat linkage analysis (59%); however, the adoption of single nucleotide polymorphism‐based platforms was observed and a move from blastomere to trophectoderm testing. There was a variation in testing strategies, assigning marker informativity and understanding test limitations, some clinically unsafe. Critical errors were reported for genotyping and interpretation. Conclusion: EQA provides an overview of the standard of preimplantation genetic testing‐M clinical testing and identifies areas of improvement for accurate detection of high‐risk embryos. Key points: External quality assessment (EQA) is required to assess of the standard of testing for monogenic disorders, which incorporates the end‐to‐end process for preimplantation genetic testing (PGT‐M).12 years of EQA demonstrates the evolution of testing and identifies disease‐specific challenges for delivering appropriate strategies to identify high‐risk/low‐risk haplotypes.The importance of genotyping accuracy and understanding marker informativity is critical for the assignment of risk haplotypes and this manuscript highlights the variability in clinical practice. [ABSTRACT FROM AUTHOR]

Copyright of Online Journal of Recreation & Sports is the property of Online Journal of Recreation & Sports and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bagcilar Medical Bulletin / Bağcılar Tıp Bülteni is the property of Galenos Yayinevi Tic. LTD. STI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A proportional‐resonant (PR)‐based current control strategy for grid‐connected packed‐E cell (PEC) inverter is presented. Unlike the existing control strategies, which are based on proportional‐integral controller, developed for packed‐U cell and PEC inverters, the proposed PR‐based control strategy achieves zero steady‐state error in the grid current. Furthermore, it eliminates the necessity of employing the control loop for regulating the dc capacitor voltages. Also, the grid current synchronization is achieved by using a Lyapunov filter‐based phase locked loop (PLL). The consequence of using Lyapunov filter‐based PLL is that sinusoidal synchronization signal can be extracted from the distorted grid voltage. The performances of the proposed control strategy under steady‐state, load variation and non‐ideal grid voltage are investigated on a laboratory‐scale experimental prototype. It is reported that the control of both dc‐ and ac‐side variables of the system are accomplished. [ABSTRACT FROM AUTHOR]

Objective: Ketamine changes respiratory mechanics, provides airway relaxation, and alleviates bronchospasm in patients with pulmonary disease. This study investigated the effect of a continuous infusion of ketamine during thoracic surgery on arterial oxygenation (PaO2/FiO2) and the shunt fraction (Qs/Qt) in patients with chronic obstructive pulmonary disease. Methods: Thirty patients older than 40 years, diagnosed with chronic obstructive pulmonary disease, and undergoing lobectomy were recruited for this study. Patients were allocated randomly to 1 of 2 groups. At the induction of anaesthesia, group K received intravenous (iv) 1 mg kg-1 ketamine as a bolus and followed by 0.5 mg kg-1 h-1 infusion until the end of the operation. Group S received the same amount of 0.9% saline as a bolus at induction and followed by a 0.5-mL kg-1 h-1 infusion of 0.9% saline until the end of the operation. PaO2 and PaCO2 values, FiO2 levels, PaO2/FiO2 ratio, peak airway pressure (Ppeak), plateau airway pressure (Pplat), dynamic compliance, and shunt fraction (Qs/Qt) were recorded during two-lung ventilation as a baseline and at 30 (one-lung ventilation, OLV-30) and 60 (OLV-60) minutes during one-lung ventilation. Results: PaO2, PaCO2, PaO2/FiO2 values, and Qs/Qt ratio were similar between the 2 groups at OLV-30 minute (P = .36, P = .29, P = .34). However, at OLV-60 minute, PaO2, PaO2/FiO2 values were significantly increased, and Qs/Qt ratios were significantly decreased in group K than in group S (P = .016, P = .011, P = .016). Conclusions: Our data suggest that a continuous infusion of ketamine and desflurane inhalation in patients with chronic obstructive pulmonary disease during one-lung ventilation increase arterial oxygenation (PaO2/FiO2) and decrease shunt fraction. [ABSTRACT FROM AUTHOR]

Copyright of International Journal of Education Technology & Scientific Researches is the property of Ayse Burcu Ulusoy and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Air-entraining admixtures added to cementitious systems in order to increase freeze-thaw resistance also affect the fresh state properties of the mixture. In this study, the effect of the use of air-entraining admixtures on the rheological properties of urea-containing Portland cement systems was investigated. For this purpose, 3 different paste mixtures were prepared by adding 0.15% and 0.30% air-entraining admixtures to the control mixture containing 3% urea instead of cement. The dynamic yield stress and viscosity values of the prepared mixtures were determined in accordance with the Herschel Bulkley model. It was determined that the dynamic yield stress values of the paste mixtures increased and the viscosity values decreased with the use of air-entraining admixtures. It was understood that this behavior became more evident with the increase in the use of admixtures. [ABSTRACT FROM AUTHOR]

It was emphasized that 8% of the CO2 emission that causes global warming occurs during cement production. In addition, the consumption of natural resources used in cement production increases due to the increase in cement demand with the widespread use of concreting. In this context, studies on alternative binders continue in order to reduce cement production and consumption. Today, besides the use of mineral additives such as blast furnace slag, fly ash and silica fume as binders in concrete mixtures, studies on the disposal and sustainability of other industrial wastes are continuing. One of the wastes generated in the industry is formed in boron plants. It is important to evaluate boron wastes especially in Turkey, which has significant boron reserves in the world. Studies on the use of boron wastes in concrete mixtures have recently become widespread. In this study, a comprehensive literature search was conducted on the effect of boron waste usage on the fresh state, mechanical, durability and radiation absorption properties of cementitious systems. In this context, with the increase in the use of boron waste and the increase in its usage rate, the radiation absorption properties of cementitious systems, their resistance to high temperatures and freeze-thaw have improved. However, with the addition of waste, the fresh water requirement and setting time of the mixtures increased. In terms of compressive strength, if the boron wastes in the mixtures exceed 10%, their compressive strength generally decreased. [ABSTRACT FROM AUTHOR]

A grid-synchronization-based fundamental frequency positive-sequence (FFPS) and negative-sequence (FFNS) amplitudes estimation technique is proposed for unbalanced and distorted grid. In this technique, the sequence amplitudes are extracted by extracting the phase-angle of the FFPS and FFNS components. The extracted phase-angles have DC and double frequency AC components. The AC component is filtered out by using a Moving Average Filter (MAF) of appropriate window length. From the extracted phase-angle, the unknown frequency can be estimated by using a suitable controller. A frequency-fixed equidistant samples-based pre-loop filter is also applied to eliminate the effect of measurement offset. The proposed technique has a very simple structure and is easy to tune. Small-signal modeling-based stability analysis and gain tuning procedure are also provided. The proposed technique strikes a good balance between fast convergence and disturbance rejection capability. Comparative numerical simulation and experimental results with similar other techniques demonstrate the suitability and performance enhancement by the proposed technique. [ABSTRACT FROM AUTHOR]

Purpose: This study aims to provide control of liquids, especially against water-based ink on the paper and paperboard surface with natural substances, in also practical and greenway. Design/methodology/approach: The paper surface was treated with natural rosin and its derivatives to obtain a hydrophobic effect and to improve printing properties. The oleoresin samples collected from Pinus nigra Arnold and Pinus pinaster Aiton trees in the controlled area and turpentine content removed was by hydrodistillation. The gum rosin (GR), fortified 10% with maleic anhydride (MGR) and esterified with 10% pentaerythritol (PMGR) samples solved in a simply alcohol and sprayed the base paper surface directly with a spray gun. Base paper samples were paperboard, bleached paper and test liner paper. Then, flexo printing was applied and printability properties were measured. Findings: The treatment weights of these paper samples were 1.8 ± 0.5, 1.3 ± 0.5 and 0.7 ± 0.2 g/m2, respectively, compared to the base paper. Greater Cobb60 results were obtained from modified rosin samples than unmodified gum rosin-sized paperboards and the PMGR surface treatment reduces Cobb60 values by 20% and MGR treatment reduces 15% comparing to the base sheet. Then, the printing procedure was applied to the surface of the treated materials using a flexo printing system. As a result of the treatment better print density, chroma and print lightness value consumed a less hydrophobic agent and controlling water-based flexo ink on the base paper surface. Originality/value: The unique aspect of this work was improving the hydrophobicity of the paper surfaces was achieved by spraying with natural rosin and derivatives. [ABSTRACT FROM AUTHOR]

Copyright of Turkish Online Journal of Design, Art & Communication is the property of Turkish Online Journal of Design, Art & Communication and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Communication Theory & Research / Iletisim Kuram ve Arastirma Dergisi is the property of Gazi University, Faculty of Communication and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Purpose: The purpose of this qualitative review paper is to identify for practitioners ways of matching mentors and protégés to enhance the effectiveness of formal mentoring programs. Design/methodology/approach: The paper qualitatively reviews the best available evidence of ways to match mentors and protégés to maximize mentorship outcomes. Findings: Two factors to consider when making mentor–protégé matches emerged from the research literature (1) the matching process (i.e., how matches are made and facilitated by practitioners such as incorporating participant input on matches): and (2) individual characteristics (i.e., individual differences that may serve as matching criteria such as experiential, surface-level, and deep-level characteristics). This qualitative review resulted in three practical recommendations to practitioners interested in matching mentors and protégés using evidence-based methods: (1) match based on deep-level similarities, (2) consider developmental-needs of protégés during matching, and (3) seek mentors' and protégés' input before finalizing matches. Research limitations/implications: Limitations of the research reviewed are highlighted: measures of perceived similarity, relative effectiveness of matching-related factors, limited research investigating the role of dissimilarity on mentoring outcomes, and linear relationship assumptions between matching-related factors and mentoring outcomes. Practical implications: The authors' recommendations suggested greater use of valid psychometric assessments to facilitate matching based on actual assessed data rather than program administrators' personal knowledge of mentors and protégés. Originality/value: The literature on mentor–protégé matching is missing practical guidance on how to apply the research. This highlights a need for a qualitative review of the literature to identify what matching processes and criteria are most effective, providing a "one-stop-shop" for practitioners seeking advice on how to construct effective mentor–protégé matches in formal mentorship programs. [ABSTRACT FROM AUTHOR]

Objective: Perianal fistula is an anorectal disease that can significantly impair quality of life. The course of the disease can include chronic exacerbation and recurrence. Many surgical techniques have been developed to treat perianal fistula, but reappearance of the fistula is still a major problem. The aim of the present study was to evaluate the results of partial fistula tract excision (partial fistulectomy) and loose seton application in the treatment of primary and recurrent perianal fistula. Materials and Methods: Forty-two patients with a primary or recurrent perianal fistula who underwent a partial fistulectomy with loose seton placement at a single clinic between January 2015 and March 2020 were included. Clinical and demographic characteristics including the fistula location, postoperative recurrence, anal incontinence, and satisfaction rate were evaluated retrospectively. Results: Of the 42 patients, 15 were female and 27 were male. The mean age was 43.4±13.1 years and the median follow-up period was 10 months (range: 5-21 months). No statistically significant difference in disease recurrence was found in terms of age, sex, American Society of Anesthesiologists classification, smoking, abscess history, fistula type, or primary/recurrence status (p>0.05). Total anal incontinence did not develop in any patient during the follow-up period. Recurrence of perianal fistula was observed in 2 patients (4.8%). Conclusion: The results of the present study indicated that partial fistula tract excision and loose seton implantation remains the primary treatment method of choice due to the low rate of recurrence and incontinence coupled with high patient satisfaction. [ABSTRACT FROM AUTHOR]

The random distribution of polypropylene fibers in concrete mixtures leads to an increase in abrasion and freeze-thaw resistance, a decrease in volume expansions formed as a result of sulfate attack and alkali silica reaction (ASR). Since the addition of polypropylene fiber in appropriate ratios to concrete mixtures improves the durability properties of the elements, the total cost decreases. The energy absorption capacity of concrete mixtures increases and their plastic shrinkage cracks significantly decrease by polypropylene fiber utilization. This study presents a comprehensive literature review related to history, advantages and disadvantages, workability, mechanical properties, durability performance and dimensional stability of polypropylene fiber-bearing concrete mixtures. For this aim, compressive, tensile and flexural strengths, modulus of elasticity, flexural crack and post-cracking behavior, the resistance of freeze-thaw, sulfate, high-temperature and abrasion as well as alkali-silica reactivity, drying shrinkage-based length change and impact strength of fibrous concrete mixture are thoroughly discussed. [ABSTRACT FROM AUTHOR]

Polycarboxylate-based water reducing admixtures (PCE) are widely used in concrete technology as they have superior properties such as ease of molecular structure change, high dispersing and water reduction capacity. Besides these positive effects, PCEs show a high sensitivity to clay particles. Surface adsorption and intercalation of PCEs with clays reduce their dispersing and water reduction capacity. The action-performance of PCE depends on the morphological properties of clays and the chemical structure of PCEs. Approaches such as increasing PCE dosage, adding polyethylene-glycol (PEG)—grafted lignin, and using clay tolerant sacrificial agents were proposed to avoid the adverse effect of clays on the action performance of PCE. However, as these approaches are not economical, there is a need to synthesize modified PCEs. In this study, PCE-clay interaction and methods to increase the action-performance of PCE in systems containing clay were investigated in detail. It was reported that the addition of functional groups to PCEs or use of PCEs with short polyethylene oxide (PEO) side chain lengths limit intercalation. In addition, it was emphasized that the size of the side chain shape that the clays cannot be included in the interlayer region prevents intercalation and increases the action-performance of PCE. [ABSTRACT FROM AUTHOR]

Copyright of Mediterranean Journal of Sport Science (MJSS) is the property of Mediterranean Journal of Sport Science (MJSS) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper considers the reference signal generation problem for the multi-functional operation of single-phase dynamic voltage restorers. For this purpose, a single-phase quasi type-1 phase-locked loop (QT1-PLL) is proposed. The pre-loop filter part of this PLL is composed of a frequency-fixed delayed signal cancellation method and a two-stage all-pass filter. Thanks to the frequency-fixed nature, the pre-loop filter is easy to implement and can provide rejection of any measurement offset. Moreover, this PLL benefits from the excellent harmonic robustness property of the conventional QT1-PLL. Small-signal modeling and gain tuning procedures are detailed in this paper. In order to track the reference voltage signals generated by the proposed PLL, a super-twisting sliding mode controller is also presented, which helps to achieve fast dynamic responses. Laboratory-scale prototype-based experimental studies were conducted to validate the developed reference generator and the controller. Experimental results show that the proposed method is fast in detecting and compensating any grid voltage anomalies to maintain constant load voltage despite voltage sag, swell, and harmonic distortions. [ABSTRACT FROM AUTHOR]

In this study, flax fiber char (CH), a kind of biomass carbon material obtained by thermochemical conversion of flax fibers in a nitrogen environment in a fixed bed reactor, was used as a reinforcing constituent together with carbon fiber (CF) to produce polyamide 66 (PA66) hybrid composites. The potential use of biochar as a promising substitutional filler candidate for CF in composite applications was deemed in principle. Biochar and carbon fiber surfaces were treated with nitric acid followed by modification with a 3‐aminopropyltriethoxysilane coupling agent to improve their interfacial compatibility with PA66. The overall characterization of the composite materials was conducted by performing the thermal gravimetric analysis and differential scanning calorimetry measurements and tensile and water absorption tests. Scanning electron microscopy was further employed to examine the fracture surface of the specimens. The findings obtained revealed that silane ‐modified CF and CH altered composite material crystallization behavior, thus enhancing the ultimate composite tensile strength and Young's modulus. Moreover, the tailored interfacial interactions associated with enhanced thermal stability were determined to reduce water absorption capacity for composites with CH. In brief, CH may be substituted with CF, cost‐effectively, at a 50:50 w/w ratio of total reinforcement (10 wt%) in PA66 without compromising ultimate composite performance. [ABSTRACT FROM AUTHOR]

Copyright of Synesis is the property of Synesis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)