Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Permanent URI for this collectionhttps://hdl.handle.net/20.500.14517/19
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Article Citation Count: 2Entropy and energy analysis of water/silver nanofluid flow in a microchannel by changing the angle of attack of a cam-shaped vortex generator(Elsevier B.V., 2024) Salahshour, Soheıl; Basem,A.; Jaafar,M.S.; Dayoub,M.S.; Akbari,O.A.; Marzban,A.; Sarlak,R.Background: This study simulates the laminar forced flow of water/silver nanofluid in solid nanoparticle volume fractions ranging from 0 % to 6 % in a microchannel with vortex generators. For Reynolds numbers 100 to 800, the angle of attack of the vortex is changed from 0 to -90° Methods: The finite volume method is used for the 2D numerical study. Increasing the angle of attack leads to greater local flow mixing, which diffuses heat towards the upper parts of the flow, resulting in a favorable microchannel temperature distribution. During the movement of the fluid, the temperature difference between the surface and the fluid decreases. In addition to local friction, shear stress is also responsible for the friction factor. If the Reynolds number is high and the angle of attack is -30°, then the Nusselt number becomes significant. After passing the vortex generators, the effective flow area is higher, which is due to the higher effective flow area. Among the studied cases, the highest friction occurs for an angle of attack of -90° Significant findings: For higher volume fractions of nanoparticles (φ), the effect of fluid velocity dissipation and friction factor variations are higher. To limit entropy generation, higher Reynolds numbers and nanoparticle concentrations could be used. Changing the vortex generator angle has a limited influence on the entropy generation. © 2024 The Author(s)Article Citation Count: 0Building Occupancy Detection for Energy-Saving: Exploring the Current Technologies and Methods with their Underlying Issues(Collegium Basilea, 2024) Girei,Z.J.B.; Chukwumauchegbu,M.I.; Adewolu,A.O.; Naibi,A.U.; Uwa,J.N.Non-intrusive indoor environment sensing for occupancy detection and estimation has attracted extensive research interest in the building domain over the past decade due to the increasing number of applications for improving building infrastructure. Occupancy detection and estimation can be integrated into building appliances to manage lighting applications, intrusion detection in secured building areas, and occupancy-driven ventilation which has the potential to improve the performance of the Heating Ventilation and air-conditioning (HVAC) system through the finegrained occupant count to enhance the trade-off between thermal comfort and energy consumption. The research strategies for occupancy detection and estimation have utilized different technologies (including camera, wearable, and indoor environmental variables sensing through direct sensing and machine learning), which experience challenges in terms of acquiring essential sensory data related to occupancy information and correctly modeling the occupancy data due to hardware deployment limitations and underlying cost. This study explores existing technologies and methods for occupancy detection and estimation with their underlying issues. It provides a comprehensive procedure for occupancy modeling methodology using different machine learning methods and analyzing their comparative results to assist in decision making for choosing an optimal technique for solving occupancy detection and estimation problem. The results recommend Random Forest as a candidate model with high performance achieving 73.6% to 99.7% for occupancy detection and overall, 99.3% for occupancy estimation. © 2024, Collegium Basilea. All rights reserved.Article Citation Count: 1Combined search for electroweak production of winos, binos, higgsinos, and sleptons in proton-proton collisions at Formula Presented(American Physical Society, 2024) Hayrapetyan,A.; Tumasyan,A.; Adam,W.; Andrejkovic,J.W.; Bergauer,T.; Chatterjee,S.; Lasaosa García,C.A combination of the results of several searches for the electroweak production of the supersymmetric partners of standard model bosons, and of charged leptons, is presented. All searches use proton-proton collision data at Formula Presented recorded with the CMS detector at the LHC in 2016-2018. The analyzed data correspond to an integrated luminosity of up to Formula Presented. The results are interpreted in terms of simplified models of supersymmetry. Two new interpretations are added with this combination: a model spectrum with the bino as the lightest supersymmetric particle together with mass-degenerate Higgsinos decaying to the bino and a standard model boson, and the compressed-spectrum region of a previously studied model of slepton pair production. Improved analysis techniques are employed to optimize sensitivity for the compressed spectra in the wino and slepton pair production models. The results are consistent with expectations from the standard model. The combination provides a more comprehensive coverage of the model parameter space than the individual searches, extending the exclusion by up to 125 GeV, and also targets some of the intermediate gaps in the mass coverage. © 2024 CERN, for the CMS Collaboration.Article Citation Count: 2Search for long-lived particles using displaced vertices and missing transverse momentum in proton-proton collisions at Formula Presented(American Physical Society, 2024) Hayrapetyan,A.; Tumasyan,A.; Adam,W.; Andrejkovic,J.W.; Bergauer,T.; Chatterjee,S.; Kailasapathy,B.A search for the production of long-lived particles in proton-proton collisions at a center-of-mass energy of 13 TeV at the CERN LHC is presented. The search is based on data collected by the CMS experiment in 2016-2018, corresponding to a total integrated luminosity of Formula Presented. This search is designed to be sensitive to long-lived particles with mean proper decay lengths between 0.1 and 1000 mm, whose decay products produce a final state with at least one displaced vertex and missing transverse momentum. A machine learning algorithm, which improves the background rejection power by more than an order of magnitude, is applied to improve the sensitivity. The observation is consistent with the standard model background prediction, and the results are used to constrain split supersymmetry (SUSY) and gauge-mediated SUSY breaking models with different gluino mean proper decay lengths and masses. This search is the first CMS search that shows sensitivity to hadronically decaying long-lived particles from signals with mass differences between the gluino and neutralino below 100 GeV. It sets the most stringent limits to date for split-SUSY models and gauge-mediated SUSY breaking models with gluino proper decay length less than 6 mm. © 2024 CERN, for the CMS Collaboration.Article Citation Count: 0Drowsiness Detection Using Brain Signal Recognition Deep Neural Network (BSRDNN)(International Information and Engineering Technology Association, 2024) Bilgen, Semih; Bilgen,S.A novel deep learning architecture, brain signal recognition deep neural network (BSRDNN), based on a one-dimensional convolutional neural network model (1D-CNN) and artificial neural network (ANN), is proposed for drowsiness detection from single-channel electroencephalographic (EEG) data. The effectiveness of the method is shown using the MIT/BIH polysomnographic EEG dataset (MIT/BIH-PED) with more than 80h long-term EEG data collected by a single electrode. EEG signals for 16 subjects were classified by BSRDNN as wakefulness, drowsiness, and sleep. BSRDNN was used via two approaches: Option 1 consists of feature extraction and classification by deep learning; in Option 2, feature and classification are performed by machine learning algorithms, naïve Bayes (NB), k-nearest neighbours (KNN), random forest (RF), and stochastic gradient descent (SGD). Combined-subject validation was applied extraction to enhance the performance of the proposed technique. Simulations demonstrated better performance in terms of accuracy, recall, F1-score and precision compared to the current state-of-the-art techniques applied to the same dataset: We obtained 92.31% overall accuracy in Option 1, and 94.8-100% in Option 2. The proposed novel BSRDNN model demonstrates clear superiority over those featured in published research that used the same MIT/BIH-PED dataset. It can perform its designated task with less trainable parameters and arithmetic operations compared to other models, resulting in faster training and testing phases. This enhanced speed facilitates quicker drowsiness detection, thereby reducing the overall time required for the process. ©2024 The authors.Article Citation Count: 0Assessment of Heavy Metal Contamination and Health Risks in Road Deposited Sediments: A Study in Owerri, Nigeria(Nicolaus Copernicus University, 2024) Odochi,U.B.; Joan,E.; Zanders,A.C.C.; Ebuka,A.O.; Helen,N.The study aims to conduct an ecological risk assessment and build a pollution model for assessing trace metal concentrations in road dust in Owerri, Nigeria. Key roadways in the urban area were chosen based on traffic volume, population density, and human activity. Data was collected at 500-meter intervals throughout each route, and silt samples were collected by systematic sweeping of a 1 square metre area covering road pavements and curbs. The examination found metallic pollutants such as chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), and lead (Pb) inside the RDS. Nickel (Ni), copper (Cu), cadmium (Cd), and lead (Pb) levels were substantially higher than their respective background values. Carbon monoxide levels along Port Harcourt Road, specifically 670 mg/l, are much higher than the background norm, indicating a considerable influence of human activity. Estimated enrichment values for the metallic elements ranged from insignificant (Mn) to extremely high (Co, Ni, Cu, Zn, Pb). Based on geoaccumulation index data, it can be concluded that the RDS has significant levels of contamination in terms of Ni and Pb, implying a considerable buildup of certain heavy metals, most likely due to anthropogenic acts. The study identified two major sources of heavy metal contamination: natural sources originating in the Earth's crust and transportation-related activities such as air deposition, corrosion, and vehicle degradation. © 2024 Nicolaus Copernicus University. All rights reserved.Article Citation Count: 0Search for Baryon Number Violation in Top Quark Production and Decay Using Proton-Proton Collisions at Formula Presented(American Physical Society, 2024) Hayrapetyan,A.; Tumasyan,A.; Adam,W.; Andrejkovic,J.W.; Bergauer,T.; Chatterjee,S.; Sonnadara,D.U.J.A search is presented for baryon number violating interactions in top quark production and decay. The analysis uses data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the CMS detector at the LHC with an integrated luminosity of Formula Presented. Candidate events are selected by requiring two oppositely charged leptons (electrons or muons) and exactly one jet identified as originating from a bottom quark. Multivariate discriminants are used to separate the signal from the background. No significant deviation from the standard model prediction is observed. Upper limits are placed on the strength of baryon number violating couplings. For the first time the production of single top quarks via baryon number violating interactions is studied. This allows the search to set the most stringent constraints to date on the branching fraction of the top quark decay to a lepton, an up-type quark (Formula Presented or Formula Presented), and a down-type quark (Formula Presented, Formula Presented, or Formula Presented). The results improve the previous bounds by 3 to 6 orders of magnitude based on the fermion flavor combination of the baryon number violating interactions. © 2024 CERN, for the CMS Collaboration.Article Citation Count: 0Constraints on anomalous Higgs boson couplings from its production and decay using the WW channel in proton–proton collisions at s=13TeV(Springer Nature, 2024) Hayrapetyan,A.; Tumasyan,A.; Adam,W.; Andrejkovic,J.W.; Bergauer,T.; Chatterjee,S.; Gomez,G.A study of the anomalous couplings of the Higgs boson to vector bosons, including CP-violation effects, has been conducted using its production and decay in the WW channel. This analysis is performed on proton–proton collision data collected with the CMS detector at the CERN LHC during 2016–2018 at a center-of-mass energy of 13 TeV, and corresponds to an integrated luminosity of 138fb-1. The different-flavor dilepton (eμ) final state is analyzed, with dedicated categories targeting gluon fusion, electroweak vector boson fusion, and associated production with a W or Z boson. Kinematic information from associated jets is combined using matrix element techniques to increase the sensitivity to anomalous effects at the production vertex. A simultaneous measurement of four Higgs boson couplings to electroweak vector bosons is performed in the framework of a standard model effective field theory. All measurements are consistent with the expectations for the standard model Higgs boson and constraints are set on the fractional contribution of the anomalous couplings to the Higgs boson production cross section. © The Author(s) 2024.Article Citation Count: 0Dynamics of novel soliton and periodic solutions to the coupled fractional nonlinear model(Elsevier B.V., 2024) Salahshour, Soheıl; Muhammad,J.; Rezazadeh,H.; Hosseinzadeh,M.A.; Salahshour,S.This study secures the soliton solutions of the (2+1)-dimensional Davey–Stewartson equation (DSE) incorporating the properties of the truncated M-fractional derivative. The DSE and its coupling with other systems have extensive applications in many fields, including physics, applied mathematics, engineering, hydrodynamics, plasma physics, and nonlinear optics. Various solutions, such as dark, singular, bright-dark, bright, complex, and combined solitons, are derived. In addition, exponential, periodic, and hyperbolic solutions are also generated. The newly designed integration method, known as the modified Sardar subequation method (MSSEM), has been applied in this study for extracting the solutions. The approach is efficient in explaining fractional nonlinear partial differential equations (FNLPDEs) by confirming pre-existing solutions and producing new ones. Furthermore, we plot the density, 2D, and 3D graphs with the associated parameter values to visualize the solutions. The outcomes of this work indicate the effectiveness of the method utilized to improve nonlinear dynamical behavior. We anticipate that our work will be helpful for a large number of engineering models and other related problems. © 2024 The Author(s)Article Citation Count: 0Observation of the Formula Presented decay in proton-proton collisions at Formula Presented(American Physical Society, 2024) Hayrapetyan,A.; Tumasyan,A.; Adam,W.; Andrejkovic,J.W.; Bergauer,T.; Chatterjee,S.; Fernandez Menendez,J.The Formula Presented decay has been observed with a statistical significance in excess of five standard deviations. The analysis is based on an event sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of Formula Presented. Normalizing to the Formula Presented decay mode leads to a branching fraction of Formula Presented, a value that is consistent with the standard model prediction. © 2024 CERN, for the CMS Collaboration.Article Citation Count: 0Search for the lepton flavor violating τ → 3μ decay in proton-proton collisions at s=13TeV(Elsevier B.V., 2024) Hayrapetyan,A.; Tumasyan,A.; Adam,W.; Andrejkovic,J.W.; Bergauer,T.; Chatterjee,S.; Lasaosa García,C.A search for the lepton flavor violating τ→3μ decay is performed using proton-proton collision events at a center-of-mass energy of 13 TeV collected by the CMS experiment at the LHC in 2017–2018, corresponding to an integrated luminosity of 97.7 fb−1. Tau leptons produced in both heavy-flavor hadron and W boson decays are exploited in the analysis. No evidence for the decay is observed. The results of this search are combined with an earlier null result based on data collected in 2016 to obtain a total integrated luminosity of 131 fb−1. The observed (expected) upper limits on the branching fraction B(τ→3μ) at confidence levels of 90 and 95% are 2.9×10−8 (2.4×10−8) and 3.6×10−8 (3.0×10−8), respectively. © 2024 The Author(s)Article Citation Count: 5Bi-modal COVID-19 transmission with Caputo fractional derivative using statistical epidemic cases(Elsevier B.V., 2024) Baleanu,D.; Qureshi,S.; Yusuf,A.; Soomro,A.; Osman,M.S.The progression of the still ongoing COVID-19 epidemic must be studied in the world of differential operators other than those specified with integer-order temporal derivatives, according to ongoing scientific studies in the fields of fractional calculus, mathematical modeling, and epidemiology. Infectious diseases leave behind a historical footprint because of their long memory. With this in mind, the article below makes an effort to probe an epidemiological model using a Caputo differential operator with a singular kernel of power-law type. The ability of the Caputo operator to capture the evolution of complicated phenomena has been demonstrated in a number of studies, prompting us to conduct the analysis presented here. The analysis contains solid reasons while using the fractional operator for the COVID-19 epidemiological paradigm and presents the fixed point concept for the existence and uniqueness of its solutions. Hyers–Ulam–Rassias stability aids in finding model equilibrium, and the nonlinear least squares method yields the unknown parameters that also include the model's fractional order. The actual cases of the infection support the superiority of the Caputo concept with evidence of smaller residuals. The numerical simulations are run to see how varying important parameters affect the disease's spread. © 2024 The Author(s)Article Citation Count: 1Combination of Measurements of the Top Quark Mass from Data Collected by the ATLAS and CMS Experiments at √=7 and 8 TeV(American Physical Society, 2024) Hayrapetyan,A.; Tumasyan,A.; Adam,W.; Andrejkovic,J.W.; Bergauer,T.; Chatterjee,S.; Scodellaro,L.A combination of fifteen top quark mass measurements performed by the ATLAS and CMS experiments at the LHC is presented. The datasets used correspond to an integrated luminosity of up to 5 and Formula Presented of proton-proton collisions at center-of-mass energies of 7 and 8 TeV, respectively. The combination includes measurements in top quark pair events that exploit both the semileptonic and hadronic decays of the top quark, and a measurement using events enriched in single top quark production via the electroweak Formula Presented channel. The combination accounts for the correlations between measurements and achieves an improvement in the total uncertainty of 31% relative to the most precise input measurement. The result is Formula Presented, with a total uncertainty of 0.33 GeV. © 2024 CERN, for the CMS and ATLASs Collaboration.Article Citation Count: 0An innovative method for building electricity energy management in smart homes based on electric vehicle energy capacity(Frontiers Media SA, 2024) Dodo,Y.A.; Ibrahim,A.O.; Abuhussain,M.A.; Baba Girei,Z.J.; Maghrabi,A.; Naibi,A.U.The surging demand for electricity, fueled by environmental concerns, economic considerations, and the integration of distributed energy resources, underscores the need for innovative approaches to smart home energy management. This research introduces a novel optimization algorithm that leverages electric vehicles (EVs) as integral components, addressing the intricate dynamics of household load management. The study’s significance lies in optimizing energy consumption, reducing costs, and enhancing power grid reliability. Three distinct modes of smart home load management are investigated, ranging from no household load management to load outages, with a focus on the time-of-use (ToU) tariff impact, inclining block rate (IBR) pricing, and the combined effect of ToU and IBR on load management outcomes. The algorithm, a multi-objective approach, minimizes the peak demand and optimizes cost factors, resulting in a 7.9% reduction in integrated payment costs. Notably, EVs play a pivotal role in load planning, showcasing a 16.4% reduction in peak loads and a 7.9% decrease in payment expenses. Numerical results affirm the algorithm’s adaptability, even under load interruptions, preventing excessive increases in paid costs. Incorporating dynamic pricing structures like inclining block rates alongside the time of use reveals a 7.9% reduction in payment costs and a 16.4% decrease in peak loads. In conclusion, this research provides a robust optimization framework for smart home energy management, demonstrating economic benefits, peak load reduction potential, and enhanced reliability through strategic EV integration and dynamic pricing. Copyright © 2024 Dodo, Ibrahim, Abuhussain, Baba Girei, Maghrabi and Naibi.Article Citation Count: 0A novel approach in orthodontics: Archwise distraction osteogenesis(W.B. Saunders, 2024) Erverdi,A.N.; Acar,Y.B.; Mert,B.Distraction osteogenesis can be described as a procedure that is based on the principles of physiologic remodeling and indirect fracture healing. In dentoalveolar level, conventional appliances may present some difficulties such as the need for multiple stages of DO to achieve a good occlusion due to distraction on a straight vector; incompetency to reduce the oronasal fistula in cleft patients; and the difficulty in achieving complete hard and soft tissue reconstruction, especially in cases with large alveolar defects. ArchWise Distraction Appliance (AWDA) have been developed to overcome these limitations and obtain a regenerated bone curvilinear in shape, similar to the original alveolar bone configuration. This article aims to introduce and explain the AWDA method in detail so that every clinician will be able to perform the treatment. The reader can observe the application of the procedure on a variety of cases including cleft lip and palate, trauma, and bone pathology. Possible complications and their solutions are also explained on actual cases. © 2024 Elsevier Inc.Book Part Citation Count: 0Sustainability business strategies: Contributing to business success through resilience-sustainable efforts(IGI Global, 2024) Moroojo,A.W.; Raza,A.; el Al-Abdallat,H.N.; Al Almashaqbeh,H.Sustainability is meeting present demands without compromising future needs. Due to social and environmental consciousness, modern businesses need sustainability. Sustainability business practices consider environmental, social, and economic factors. Sustainable business strategies are defined, discussed, and outlined in this chapter. Sustainability boosts profits and protects the environment and society. Examples include resource efficiency, waste reduction, renewable energy, ethical sourcing, social responsibility, and stakeholder involvement. Goals include business value and environmental and social benefits. Sustainability performance predicts long-term resilience and financial success for investors. © 2024, IGI Global. All rights reserved.Book Part Citation Count: 0Hand Printing Practices with a Sustainable Fashion Approach(Springer Nature, 2024) Hatipoglu,S.U.The textile world which has awakened with the consciousness of the new generation of consumers, has now begun to adapt, produce, and design for a better world and environment. Although it is not easy to reverse the damage that has occurred so far, even raising public awareness about what we can do for the future of environmental problems is a significant step. As human beings, we started to return to our essence to return to nature. When we approach this situation with a designer perspective, protecting our cultural values, keeping our traditional arts and crafts alive, re-applying them, updating them according to the requirements and needs of the new era, and bringing them to the future, are among the improvements we can make in this direction. Two projects shaped in line with the “Slow Fashion” discourse were demonstrated with methods and outcomes. It is revealed from an experimental point of view that hand printing arts can be methods and applications for sustainable fashion field. It is also underlined that there is a possibility that enables the revival and reevaluation of hand-printing arts and methods in a way that will meet the needs of sustainable design areas. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.Conference Object Citation Count: 0Effect of Electron’s Drift Velocity in Nonlinear Ion-Acoustic Solitons in a Negative Ion Beam Plasma(Springer, 2024) Salahshour, Soheıl; Das,R.; Hosseini,K.; Hincal,E.; Salahshour,S.In the present paper, the authors have explored the existence of KdV and mKdV solitons in a collisionless and unmagnetized plasma model involving positive ion and negative ion beams together with thermal electrons. For various selections of Q′(=mb/mi, negative ion beam to positive ion mass ratio) larger and less than one, low amplitude rarefactive and compressive KdV solitons are created in the plasma under the effect of the electron’s drift velocity ve′. In two intervals of drift velocity ve′ for 0≤ve′≤26 and 26.5≤ve′≤28.5 when Q′ is less than one, the existence of the mKdV solitons is demonstrated. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.Article Citation Count: 0Incorporation of azithromycin into akermanite-monticellite nanocomposite scaffolds: Preparation, biological properties, and drug release characteristics(Elsevier Ltd, 2024) Salahshour, Soheıl; Gataa,I.S.; Abdullah,Z.Y.; Kasiri-Asgarani,M.; Najafinezhad,A.; Bakhsheshi-Rad,H.R.; Toghraie,D.Bioceramics composed of calcium and magnesium silicates have garnered increasing attention for the development of porous scaffolds in bone tissue engineering (BTE). This heightened interest is primarily attributed to their remarkable bioactivity and their capacity to form strong bonds with hard tissue. Fabricating nanocomposite scaffolds is a recognized approach for improving the characteristics of scaffolds used in BTE. This research investigates the mechanical and biological properties, antibacterial activity, and drug-release characteristics of scaffolds composed of akermanite (AKT), monticellite (MON), and monticellite-akermanite (MON-AKT). These scaffolds were fabricated utilizing the space holder process. Additionally, the in vitro drug release profile and antimicrobial activity of Azithromycin (AZT)-loaded MON-AKT composite scaffolds were investigated. The findings showed that the Mon-15 wt% AKT nanocomposite scaffold had the highest density, the smallest grain and micropore sizes, and the lowest porosity. In contrast, integrating AKT into MON-based composite scaffolds resulted in materials characterized by high mechanical strength and stability within physiological environments. The MON-AKT nanocomposite scaffolds exhibited cytocompatibility and demonstrated a high level of alkaline phosphatase (ALP) activity in osteogenic studies. Furthermore, antimicrobial activity assessments revealed that the AZT-encapsulated MON-AKT composite scaffolds effectively inhibited the growth of both S. aureus and E. coli bacteria. The outcomes showed that the antibacterial efficacy of the scaffold depends on both the amount of AZT and the type of bacteria. Overall, MON-AKT/3AZT scaffolds exhibited significantly superior bacterial inhibition compared to other scaffolds, making it a promising option for treating bone tissue defects. © 2024 Elsevier Ltd and Techna Group S.r.l.Article Citation Count: 0The positive effects of preoperative chlorhexidine rinse to reduce postoperative pneumonia after kidney transplantation surgery(Elsevier Ltd, 2024) Gürkan, Alp; Sahin,O.Z.; Kivilcim,T.; Gurkan,A.Background: Postoperative pneumonia is one of the most observed hospital-acquired infections and increases the postoperative mortality rate. Further, it drives the healthcare systems under a severe financial burden. Preventing postoperative pneumonia is an incredibly challenging issue for clinicians. Since immunosuppression therapy, the patients who had kidney transplants are more vulnerable to postoperative infections. There is no data in the scientific literature focusing on the effects of preoperative oral care with chlorhexidine antiseptic solutions on postoperative pneumonia in kidney transplantation surgery cases. In the present research, we studied this topic. Methods: A prospective, randomized clinical trial was conducted at our institution between August 2020 and August 2022. Group A: Received 0.12 % chlorhexidine oral rinse preoperatively; Group B: Not received 0.12 % chlorhexidine oral rinse preoperatively. We analyzed the differences between the two trial groups using a chi-square or t-test. The Mann-Whitney U test was used for the categorical data. Results: Nine patients (17.6 %) were diagnosed with postoperative pneumonia in Group A and fourteen (25.9 %) in Group B (p < 0.05). Hospitalization time of Group B was prolonged (p < 0.05). In multivariate analysis, significant risk factors associated with postoperative pneumonia were advanced age, diabetes mellitus, smoking, delayed graft function and not gargling with 0.12 % chlorhexidine (p < 0.05). Conclusions: To reduce postoperative pneumonia risk in patients undergoing kidney transplantation surgery, an oral health protocol including 0.12 % chlorhexidine mouth rinse seems beneficial. © 2024 Royal College of Surgeons of Edinburgh (Scottish charity number SC005317) and Royal College of Surgeons in Ireland
