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The cubic congruence x(3)+ax(2)+bx+c equivalent to 0(mod p) and binary quadratic forms F(x, y) = ax(2)+bxy+cy(2)
(Charles Babbage Research Centre, 2007-10) Tekcan, Ahmet; Uludağ Üniversitesi/Fen Edebiyat Fakültesi/Matematik Bölümü; AAH-8518-2021; 55883777900
Let F(x,y) ax(2) + bxy + cy(2) be a binary quadratic form of discriminant Delta = b(2) - 4ac for a, b, c is an element of Z, let p be a prime number and let F-p be a finite field. In this paper we formulate the number of integer solutions of cubic congruence x(3) + ax(2) + bx + c equivalent to 0 (mod p) over Fp for two specific binary quadratic forms F-1(k) (x, y) = x(2) + kxy + ky(2) and F-2(k) (x, y) = kx(2) + kxy + k(2) y(2) for integer k such that 1 <= k <= 9. Later we consider representation of primes by F-1(k) and F-2(k).
Multiobjective crashworthiness optimization of graphene type multi-cell tubes under various loading conditions
(Springer, 2021-05) Albak, Emre İsa; Solmaz, Erol; Yıldız, Ali Rıza; Öztürk, Ferruh; Bursa Uludağ Üniversitesi/Gemlik Asım Kocabıyık Meslek Yüksekokulu/Hibrid ve Elektrikli Taşıtlar Teknolojisi Bölümü; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Otomotiv Mühendisliği Bölümü; 0000-0001-9215-0775; 0000-0001-9369-3552; 0000-0003-1790-6987; I-9483-2017; DTV-6021-2022; F-7426-2011; FRD-1816-2022; 57191051783; 6507386513; 7102365439; 56271685800
Nature is an important source of inspiration for researchers to create better designs. In this study, graphene type multi-cell tubes is inspired by graphene due to its strong and lightweight mechanical properties. Peak crushing force (PCF), energy absorption (EA) and crushing force efficiency crashworthiness indicators have been taken into consideration under different loading angles, and the complex proportion assessment (COPRAS) which is a multicriteria decision-making method has been used to determine the best model. The best model is found to be GTMT5 (second-order and third-order hollow cylinders in the graphene type multi-cell tube) by the COPRAS selection method. The multiobjective optimization, whose objective is to minimize PCF and maximize EA, is applied on the GTMT5 using the multiobjective particle swarm optimization and non-dominated sorting genetic algorithm II methods, and the techniques are compared. The optimization study is carried out on the radial basis function metamodels. This study shows that circular structures placed in multi-cell tubes have a significant effect on the crashworthiness performance.
Search for ηc(2S)hc→ pp¯ decays and measurements of the χcJ→ pp¯ branching fractions
(American Physical Society, 2013-12-03) Tapan, İlhan; Bursa Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Fizik Bölümü; CCD-9486-2022; 8905787000
Using a sample of 1.06 × 108φ(3686) events collected with the BESIII detector at BEPCII, the decays ηc(2S) → pp¯ and hcpp¯ are searched for, where ηc(2S) and hc are reconstructed in the decay chains φ(3686) → γηc(2S), ηc(2S) → pp¯ and χ(3686) → π0hc, hc→ pp¯, respectively. No significant signals are observed. The upper limits of the product branching fractions are determined to be B(φ(3686) → γηc(2S)) × B(ηc(2S) → pp¯) < 1.4 × 10-6and B(φ(3686) → π0hc) × B(hc→ pp¯) < 1.3 × 10-7at the 90% C.L.. The branching fractions for χcJ→ pp¯ (J = 0, 1, 2) are also measured to be (24.5 ± 0.8 ± 1.3, 8.6 ± 0.5 ± 0.5, 8.4 ± 0.5 ± 0.5) × 10-5, which are the world's most precise measurements. © 2013 American Physical Society.
To evaluate the differences of risk factors in patients with lower extremity venous disease
(Saudi Medical Journal, 2007-08) Sadıkoğlu, Ganime; Özçakır, Aliş; Ercan, İlker; Özkaya, Güven; Sadıkoğlu, Yurtkuran M.; Uludağ Üniversitesi/Tıp Fakültesi/Aile Hekimliği Anabilim Dalı; Uludağ Üniversitesi/Tıp Fakültesi/Biyoistatistik Anabilim Dalı; Uludağ Üniversitesi/Tıp Fakültesi/Girişimsel Radyoloji Anabilim Dalı; 0000-0001-5588-2037; 0000-0002-2382-290X; 0000-0003-0297-846X; FTO-3267-2022; AAG-8209-2021; ABF-2367-2020; A-4421-2016; INO-2041-2023; 22956348700; 9733230000; 6603789069; 16316866500; 6602402845
Objective: To determine whether there is a difference between risk factors in patients diagnosed to have clinically documented lower extremity venous disease after confirming the diagnosis radiologically by ultrasonographic and venographic evaluation. Methods: This study was performed from January 2002 to January 2005 in Bursa, the fourth biggest city of Turkey, situated in the west of the country in the Marmara Region. The study center is a private imaging center working in conjunction with the Department of Health, which performs diagnostic, and therapeutic vascular protocols in the region. Five hundred and fifty-three cases with clinically and radiologically documented diagnoses were evaluated with Multi-Variate Statistical Package 3.13 for the presence of pre-defined clusters of 14 different variables. Other statistical analyses were performed by the Statistical Package for Social Sciences, version 13.0. Results: Three different clusters were defined. The variables used to define the clusters were: age, gender, educational level, presence of smoking, amount of smoking (pack/per year), disease symptoms, presence of heart disease, and radiologically documented diagnosis. Conclusions: Chronic venous insufficiency and varicose veins are venous system diseases that are most commonly present in association with more than one concomitant risk factor.
User interventions in Turkish mass housing
(Emerald, 2007-06) Akalın, Aysu; Yıldırım, Kemal; Güngör, Can; Yücel, Çiǧdem; Uludağ Üniversitesi/Mühendislik Mimarlık Fakültesi/Mimarlık Bölümü; F-5127-2014; 25923652800
The intent and aim of the research was to look at a particular house type i.e. a terraced house with four floors, which is one of the popular designs commonly used in the last ten years in mass housing projects in Turkey. There are four alternatives of the type related with the cross-sectional relationship with the ground floor level. Emphasis was placed upon the "semi-cellar type" assuming that even though the level of residential satisfaction gradually increases with the possibility of interpreting the use of the open-plan floor space, and by proposing new design elements to create more adaptable and flexible spaces, the users may still experience dissatisfaction with designs where the space cannot be revised. With the use of a questionnaire, participants judged their own house as a whole and evaluated its uses for different functions and activities, complained in respect of changes required, and finally outlined their plans for the future. Despite the high level of satisfaction with having a garden (a unique characteristic in apartment-saturated Ankara), the aspect of dissatisfaction mostly referred to was the kitchen-garden relationship (or lack thereof). The residents, especially the older ones, were generally dissatisfied with the multi-storey design of their house. They prefer to remain on the backyard level without changing floors in different seasons. Besides, the users spending the longest time in the house complained more than the others and the people spending variable time in the house stated that they preferred to change the floors in different seasons. As compared to larger families, the smaller families were more likely to change floors.
Epidemiology of colorectal cancer in Turkey: A cross-sectional disease registry study (A Turkish Oncology Group trial)
(AVES, 2015-03-01) Manavoğlu, Osman; Uludağ Üniversitesi/Tıp Fakültesi/İç Hastalıkları Anabilim Dalı; FLP-9613-2022; 56554133100
Background/Aims: This study aimed to determine the epidemiological characteristics of colorectal cancer in Turkey. Materials and Methods: In this multicenter, prospective, and cross-sectional registry study, data for 968 patients with colorectal cancer from 21 centers in 7 geographic regions were analyzed. Results: Diagnosis was colon cancer in 662 (68.4%) and rectum cancer in 306 (31.6%) patients. In total, 60.9% of patients was male; mean age was 58.9 +/- 12.6 years. Among patients, 15.0% was drinking alcohol, 17.5% was smoking, 1.5% had familial history of polyposis, 15.0% had diabetes mellitus, 1.0% had inflammatory bowel disease. Fruit and vegetable consumption was low (<3 times/week) in 35.5% and red meat consumption was high (>= 3 times/week) in 47.4% of the patients. Median time-to diagnosis was 3.0 months and 4.0 months for patients with colon and rectum cancer, respectively. Mean body mass index was >25 in all group of patients. Distal rectum (61.3%) and sigmoid colon (36.8%) were the most common locations of cancer, for rectum and colon respectively. In total, 85.6% of patients were operated; 25.8% had emergency surgery. Low anterior resection rate was 64.2% in rectum cancer. In majority (89.8%) of the patients with rectum cancer who received preoperative treatment, conventional chemo-radiotherapy regimen was given. pTNM staging at diagnosis showed that stage III and IV patients were in majority (35.9% and 29.7%, respectively). Conclusion: Colon cancer is more frequent than rectum cancer in Turkey. Colorectal cancer patients are diagnosed at later stages. Most of the cases were operated. Interregional differences for risk factors are worthwhile for evaluation in future trials.
Efficacy of plant oils on the control of bean rust and wheat leaf rust
(Parlar Scientific Publications (PSP), 2014) Arslan, Ümit; Uludağ Üniversitesi/Ziraat Fakültesi/Bitki Koruma Bölümü; AAH-2890-2021; 8511862400
Bean rust, caused by the fungus Uromyces appendiculatus (Pers.:Pers.) Unger, and wheat leaf rust, caused by the fungus Puccinia triticina Eriks., are economically important foliar diseases and have global significance. The efficacy of eight plant oils (castor, corn, cottonseed, linseed, olive, peanut, soybean and sunflower seed oils) was evaluated as possible alternatives to synthetic fungicides for the control of U. appendiculatus and P. triticina in this study. The percentage of inhibition in urediniospore germination of all tested plant oils ranged from 0 to 100% and 0 to 84.9% against U appendiculatus and P. triticina, respectively. Among these plant oils tested, linseed oil was the most effective on the control of U appendiculatus and P. triticina in both in vitro and pot experiments. It completely inhibited the germination of the urediniospores of U appendiculatus at the highest concentration (2.5%) tested. At the same concentration, linseed oil inhibited by 84.9% the germination of the urediniospores of P. triticina. In pot experiments, control efficacy of all tested plant oils ranged from 0 to 95.2% and 17.8 to 100% against U appendiculatus and P. triticina, respectively. Linseed oil provided 95.2 and 100% control values at 1% concentration against U appendiculatus and P. triticina, respectively. All tested plant oils were found significantly effective in reducing pustules caused by P. triticina at all concentrations tested. Post-infection treatment of linseed oil was ineffective on the control of both U. appendiculatus and P. triticina. In the tests for the inhibition of urediniospore germination as well as reduction in the formation of uredinia (pustules) of both rust species there was an increase in the efficacy of the tested oils as the concentration of the oils increased. None of the tested plant oils were phytotoxic to bean and wheat leaves. The results of this study indicate that tested plant oils could become natural alternatives to synthetic fungicides for the control of tested rust fungi.
Effect of main and side chain length change of polycarboxylate-ether-based water-reducing admixtures on the fresh state and mechanical properties of cementitious systems
(Wiley-Blackwell, 2020-10) Özen, Süleyman; Ramyar, Kambiz; Altun, Muhammet Gökhan; Mardani-Aghabaglou, Ali; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi /İnşaat Mühendisliği Bölümü; 0000-0002-9345-9907; 0000-0003-0326-5015; C-7860-2015; CBF-4437-2022; 57203431200; 57669486700
In this study, the effect of both main and side chain length changes of the admixtures on some properties of cementitious systems were investigated. Three different polycarboxylate-ether-based water-reducing admixtures (WRA) having constant molecular weights and different main and side chain lengths were synthesized. Single type of raw material and carboxylate functional group were used in all WRAs. The molecular weights, free nonionic contents, and anionic/nonionic ratios of the admixtures were kept constant. Test results showed that degree of fluidity was observed in cement paste and mortar mixtures in case the admixture main and side chain length is more or less than a critical value. This negative effect is thought to be due to the weakening of the adsorption ability by the chain length change of the admixtures, the being tendency of polymers to intertwine and the adsorbing of admixture on several cement particles simultaneous. Admixtures having excessive long or short main chain and side chain improved the time-dependent slump-flow retention of the mortar mixtures. The admixtures with short main and side chains had insufficient adsorption ability and the admixture with excessive long main and side chains had the interlacing risk of polymers. In both cases, time-dependent behavior improved because the amount of free admixture in solution increased. The change in the chain lengths of the WRAs affected the 1-day compressive strength of the mortar mixtures.
Transnasal or transglabellar semicircular flap for medial canthal reconstruction
(Springer, 2021-12) Yüksel, Nilay Özturk; Meyer, Dale R.; Yazıcı, Bülent; Turgay, Tuba; Uludağ Üniversitesi/Göz Hastalıkları Anabilim Dalı; 0000-0001-8889-1933; AAA-5384-2020; GHE-5850-2022; 7005398015; 57226380204
Purpose: To review the results of medial canthal reconstruction with the medial (transnasal or transglabellar) semicircular flap. Methods: Medical charts of 38 patients who underwent the described procedure were reviewed. After tumor excision, a semicircular flap created along the nasal bridge or glabella was advanced to the canthal defect; if necessary, this flap was combined with other reconstructive methods. Results: The patients (19 male, 19 female; mean age, 66 years) had basal cell (n = 36) or squamous cell (n = 2) carcinomas. The mean tumor diameter was 9.2 mm (range, 3–21 mm). Tumor epicenters were in the midcanthal area in 21 patients (55%) and in the infra- or supracanthal areas in 17 patients (45%). After excision, 22 patients had only canthal defects, and 16 had an associated upper and/or lower eyelid defect. To cover the defect, the medial semicircular flap alone was used in 19 patients (50%) and in association with other flaps in 19 patients (50%). The excisional defect was primarily closed in 37 patients (97%). Flap necrosis or infection did not occur. During follow-up (range, 1–91 months; median, 19 months), 10 patients (26%) developed a total of 17 complications. Three patients (8%) required secondary surgery for eyelid reconstruction–related complications. Conclusions: Transnasal or transglabellar semicircular flap may be a good alternative for medial canthal reconstruction. For large or complex defects, the medial semicircular flap can be combined with other periocular flaps. In the latter case, postoperative complications requiring secondary surgery may develop.
Predictive factors for postoperative intensive care unit admission in pediatric patients undergoing scoliosis correction surgery
(e-Century Publishing Corporation, 2021) Akesen, Selcan; Uludağ Üniversitesi/Tıp Fakültesi/Anesteziyoloji ve Reanimasyon Anabilim Dalı; 0000-0002-9518-541X; ELR-9087-2022; 57221719031
Objective: Postoperative intensive care unit (ICU) admission might be required in adolescent patients following posterior fusion and instrumentation surgery for the treatment of scoliosis. We aimed to evaluate the predictive factors for mechanical ventilation and the characteristics of the patients who required an ICU stay following spinal surgery. Methods: We retrospectively reviewed the records of 85 children undergoing primary scoliosis surgery at a university-affiliated general hospital from January 2010 and June 2020 by the same spinal surgeon. The demographic data, pre- and peritoperative variables were collected and recorded. All patients underwent surgery with a combined anesthesia protocol of fentanyl and remifentanil. Results: There were 31 males (36.5%) and 54 females (63.5%). In the postoperative period, 13 patients (15.3%) were admitted to the ICU, and six of them required mechanical ventilation. Among these, three patients (50%) were extubated within the postoperative 0-12 hours, two (33.3%) within postoperative 12-24 hours, and one (16.7) after postoperative 24 hours. The major complications included acidosis (4.7%), hemodynamic instability (1.2%), hypercapnia (1.2%), hypoxemia (1.2%), and delayed extubation (1.2%). Conclusions: A smaller bodyweight percentile, neuromuscular etiology, abnormal findings in preoperative chest X-ray, additional comorbidities, and preoperative estimated risk for postoperative mechanical ventilation were among the risk factors for postoperative ICU stay. The age, height, weight, degree of the curvature, and the number of operated segments did not have an association with the postoperative outcomes.
Researches on the in vitro androgenesis and obtaining haploid plants in some eggplant genotypes
(International Society for Horticultural Science, 2007) Alpsoy, Hüseyin Can; Şeniz, Vedat; Uludağ Üniversitesi/Ziraat Fakültesi/Bahçe Bitkileri Bölümü; Uludağ Üniversitesi/Yenişehir İbrahim Orhan Meslek Yüksekokulu; GLN-9321-2022; DPS-8857-2022; 14821857000; 13604787100
This study was conducted between 1994 and 1999. Anthers were excised from numerous eggplant cultivars and their development on different culture media was investigated. The study was started with preliminary trials in 1994. An average callus formation of 30% was obtained from the anthers excised in these trials, but no haploid embryos. The trials in 1995 were established using for cultivars, namely Pala, Kemer, Topan, and Aydin Siyahi; the anthers were cultured on media supplemented with 4 different combinations of growth regulators at a temperature of 25 C and 16 h day length conditions; and overall callus formation rates of 15.12, 20.00, 24.00 and 26.42% were obtained from these four cultivars, respectively. Eggplant cvs. Kemer and Baluroi and domestic population Urfa Yerlisi were used in the trials in 1996. Callus formation rates ranged from 5.56 to 49.98%. Also the obtaining of embryos was achieved this year. Haploid embryoids and plantlets were obtained from cv. Kemer and from Urfa Yerlisi population. In these genotypes, the anthers were cultured on MS medium supplemented with 4 mg/L NAA plus 1 mg/L kinetin, and on C medium supplemented with 5 mg/L 2, 4-D plus 5 mg/L kinetin. The cultures were held in the hot-air oven at 35 C in dark conditions for the first 8 days, and then they were transferred into the incubator at 25 C and having a day length of 16 h. Embryos were obtained on C and MS medium at the rates of 3.67 and 2.05% respectively, in Urfa Yerlisi. Embryos were also obtained in the trials in 1998, under the same culture conditions. Embryo formation rates were 1.58% on MS medium in cv. Adana; 2.72 and 2.63% on C and MS medium, respectively in ev. Leila. All these embryos could eventually be developed into plantlets.
A species of Nilotonia Thor, 1905 (Acari, Hydrachnidia, Anisitsiellidae) new for the Turkish fauna
(Scientific and Technological Research Council Turkey, 2008) Boyacı, Yunus Ömer; Özkan, Muhlis; Uludağ Üniversitesi/Eğitim Fakültesi; JHK-0887-2023; 7103273174
Nilotonia (Manotonia) tegulata (Viets 1951), known previously from Africa and Italy, is new for the Turkish fauna. The morphological features are compared with similar species, and an identification key for subgenera of the genus Nilotonia is given. The subgenus Manotonia is also reported for the first time from Turkey.
Treatment of jewelry manufacturing effluent containing cyanide using ozone-based photochemical advanced oxidation processes
(Taylor & Francis, 2014-03-04) Kiril Mert, Berna; Sivrioğlu, Özge; Yonar, Taner Yona; Özçiftçi, Saire; Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü; 0000-0002-0387-0656; 0000-0001-7974-9986; AAM-8073-2020; AAD-9468-2019; FOT-8901-2022; 56114896700; 6505923781; 56115129400
This article considers Advanced Oxidation Processes involving O-3, O-3/UV, O-3/H2O2/UV, and H2O2/UV to destroy cyanide in jewelry manufacturing wastewaters. All experiments were performed in a semibatch reactor. The results showed that total cyanide can be reduced with different reaction rates, and the decrease of total cyanide can be described by pseudo-first-order kinetics. The reaction was performed under different pH values and H2O2 dosages to find the optimal conditions for the oxidation processes. The ozonation process destroyed total cyanide faster at a pH = 12, whereas ozonation combined with H2O2 and/or UV destroyed cyanide faster at a pH =10. The total cyanide destruction rate in the UV/H2O2 (700 mg/L) treatment was the highest among all studied processes, with removal efficiencies of 99% for CN-, 99% for COD and 99% for TOC.
Comparative performance of twelve metaheuristics for wind farm layout optimisation
(Springer, 2022-01) Kunakote, Tawatchai; Sabangban, Numchoak; Tejani, Ghanshyam G.; Panagant, Natee; Pholdee, Nantiwat; Kumar, Sumit; Yıldız, Ali Rıza; Uludağ Üniversitesi/Mühendislik Fakültesi/Makina Mühendisliği; 0000-0003-1790-6987; F-7426-2011; 7102365439
This work bridges two research fields i.e. metaheuristics and wind farm layout design. Comparative performance of twelve metaheuristics (MHs) on wind farm layout optimisation (WFLO) was conducted. Four WFLO problems are proposed for benchmarking the various metaheuristics while the design problem is an attempt to simultaneously minimise wind farm cost and maximise wind farm totally produced power. Design variables are wind turbine placement with fixed and varied number of wind turbines. The Jansen's wake model is used while two types of energy estimation with and without considering partially overshadowed wake areas are studied. The results obtained from using various MHs are statistically compared in terms of convergence and consistency while the best performer is obtained. Comparison results indicated that moth-flame optimisation (MFO) algorithm is the most efficient algorithms. The results obtained in this work are said to be the baseline for future study on WFLO using metahueristics.
A comparative study of energy consumption and recovery of autonomous fuel-cell hydrogen-electric vehicles using different powertrains based on regenerative braking and electronic stability control system
(MPDI, 2021-03) Yıldız, Ahmet; Özel, Mert Ali; Uludağ Üniversitesi/Mühendislik Fakültesi/Makina Mühendisliği.; 0000-0001-5434-4368; 0000-0003-2887-3359; T-8076-2018; AAP-3077-2021; 58070251000; 57222521121
Today, with the increasing transition to electric vehicles (EVs), the design of highly energy-efficient vehicle architectures has taken precedence for many car manufacturers. To this end, the energy consumption and recovery rates of different powertrain vehicle architectures need to be investigated comprehensively. In this study, six different powertrain architectures-four independent in-wheel motors with regenerative electronic stability control (RESC) and without an RESC, one-stage gear (1G) transmission, two-stage gear (2G) transmission, continuously variable transmission (CVT) and downsized electric motor with CVT-were mathematically modeled and analyzed under real road conditions using nonlinear models of an autonomous hydrogen fuel-cell electric vehicle (HFCEV). The aims of this paper were twofold: first, to compare the energy consumption performance of powertrain architectures by analyzing the effects of the regenerative electronic stability control (RESC) system, and secondly, to investigate the usability of a downsized electrical motor for an HFCEV. For this purpose, all the numerical simulations were conducted for the well-known FTP75 and NEDC urban drive cycles. The obtained results demonstrate that the minimum energy consumption can be achieved by a 2G-based powertrain using the same motor; however, when an RESC system is used, the energy recovery/consumption rate can be increased. Moreover, the results of the article show that it is possible to use a downsized electric motor due to the CVT, and this powertrain significantly reduces the energy consumption of the HFCEV as compared to all the other systems. The results of this paper present highly significant implications for automotive manufacturers for designing and developing a cleaner electrical vehicle energy consumption and recovery system.
Aeropalynological survey in Buyukorhan, Bursa
(Scientific and Technological Research Council Turkey, 2015) Tosunoğlu, Aycan; Babayiğit, Sinan; Bıcakcı, Adem; Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Biyoloji ve Botanik Bölümü; Uludağ Üniversitesi/Büyükorhan Meslek Yüksekokulu; 0000-0003-2303-672X; 0000-0002-8825-9425; 0000-0002-6333-3123; GDS-1748-2022; JCE-8599-2023; O-1244-2018; 35235434000; 56450939000; 6701674542
An aeropalynological survey of the atmosphere of Buyukorhan in Bursa Province was carried out from January 2012 to December 2013 using a Durham gravimetric sampler. The number of pollen grains per cm(2) was calculated on a weekly basis. Over 2 years a total of 13,274 pollen grains/cm(2) from 44 taxa, including 24 arboreal plants (APs) and 20 nonarboreal plants (NAPs), and unidentified pollen grains were recorded. In 2012 and 2013, respectively, 5159 and 8115 pollen grains were recorded. The pollen grains consisted of 87.46% APs, 12.20% NAPs, and 0.35% unidentified plants. Pinus, Cupressaceae/Taxaceae, Quercus, Poaceae, Morus, Plantago, Olea europaea, and Cedrus were responsible for the highest pollen amounts in the study area. The highest number of pollen grains (49.84%) was recorded during May.
Prediction of chenille yarn and fabric abrasion resistance using radial basis function neural network models
(Springer, 2007-02) Tokat, Sezai; Çeven, Erhan Kenan; Özdemir, Özcan; Uludağ Üniversitesi/Mühendislik Fakültesi/Tekstil Mühendisliği Bölümü; 0000-0003-3283-4117; 0000-0003-2494-6485; AAG-4653-2019; B-1488-2019; 6504089018; 8577587200
The abrasion resistance of chenille yarn is crucially important in particular because the effect sought is always that of the velvety feel of the pile. Thus, various methods have been developed to predict chenille yarn and fabric abrasion properties. Statistical models yielded reasonably good abrasion resistance predictions. However, there is a lack of study that encompasses the scope for predicting the chenille yarn abrasion resistance with artificial neural network (ANN) models. This paper presents an intelligent modeling methodology based on ANNs for predicting the abrasion resistance of chenille yarns and fabrics. Constituent chenille yarn parameters like yarn count, pile length, twist level and pile yarn material type are used as inputs to the model. The intelligent method is based on a special kind of ANN, which uses radial basis functions as activation functions. The predictive power of the ANN model is compared with different statistical models. It is shown that the intelligent model improves prediction performance with respect to statistical models.
Epidemiology and distribution of interstitial lung diseases in Turkey
(Wiley, 2014-01) Müsellim, Benan; Okumuş, Gülfer; Akgün, Metin; Çetinkaya, Erdoğan; Turan, Onur; Akkoçlu, Atila; Hazar, Armağan; Köktürk, Nurdan; Çalışır, Haluk Celalettin; Uzaslan, Esra Kunt; Uludağ Üniversitesi/Tıp Fakültesi/Göğüs Hastalıkları Anabilim Dalı.; CDI-1977-2022; 8761653500
Introduction: There is very few data on the epidemiological features of interstitial lung diseases (ILD) in the literature. These studies on this subject suffer from limited number of patients. Objective: The goal of this study was to evaluate the epidemiological features of ILD in Turkey. Methods: Fifty-four investigators, 31 centres in 19 cities from six regions of Turkey, participated in the study. Two thousand two hundred forty-five newly diagnosed patients (51.8% females), led by Turkish Thoracic Society Clinical Problems Study Group, enrolled in this prospective study. Results: The mean age was 51.8±16.7 years. The mean age among males was 50.5±18.6 years and 53.0±14.6 years among females (P<0.001). 23.8% of the cases had ILD with known causes, while 39.4% were in granulomatous group, 23.7% were idiopathic, and 4.4% were in the unclassified group. Overall, histopathologically confirmed diagnosis rate was 40.4%. Sarcoidosis was the most common disease (37%), whereas cases with idiopathic pulmonary fibrosis (IPF) constituted 19,9% of patients. 53% of the sarcoidosis patients were females, and the ratio reaches to 75% under 50 years of age (for this group, IPF ratio is %3). In contrast, sarcoidosis and IPF ratios were equal in males (25%). Sarcoidosis was 8% in men over 50, while IPF was %45. Conclusion: The overall incidence of ILD in Turkey was computed to be 25.8/100000.
Changes in antioxidant activity and phenolic acid composition of tarhana with steel-cut oats
(Elsevier, 2013-02-15) Kılcı, Aslı; Göçmen, Duygu; Uludağ Üniversitesi/Ziraat Fakültesi/Gıda Mühendisliği Bölümü; FDE-3256-2022; KDP-3344-2024; 55860204000; 55967047900
Steel-cut oats (SCO) was used to replace wheat flour in the tarhana formulation (control) at the levels of 10%, 20%, 30% and 40% (w/w). Control sample included no SCO. Substitution of wheat flour in tarhana formulation with SCO affected the mineral contents positively. SCO additions also increased phenolic acid contents of tarhana samples. The most abundant phenolic acids were ferulic and vanillic acids, followed by syringic acid in the samples with SCO. Tarhana samples with SCO also showed higher antioxidant activities than the control. Compared with the control, the total phenolic content increased when the level of SCO addition was increased. SCO addition did not have a deteriorative effect on sensory properties of tarhana samples and resulted in acceptable soup properties in terms of overall acceptability. SCO addition improved the nutritional and functional properties of tarhana by causing increases in antioxidant activity, phenolic content and phenolic acids.
Cost assessment of the possibility of using three types of wind turbine in Turkey
(Sage Publications, 2007) Vardar, Ali; Çetin, Bahattin; Uludağ Üniversitesi/Ziraat Fakültesi/Tarım Makinaları Bölümü; Uludağ Üniversitesi/Ziraat Fakültesi/Tarım Ekonomisi Bölümü; 0000-0001-6349-9687; AAH-5008-2021; EQA-9878-2022; 15049958800; 56186371400
Turkey's some region has a vast open land. Therefore, it has great potential of using solar and wind energy sources for domestic and industrial use. This research is going to propose and assess about the wind power cost per kWh of electricity produced using three types of wind electric conversion systems at 14 locations in Turkey. Wind during curves were developed and utilized to calculate the cost per kWh of electricity generated from three chosen wind turbines. According to the research findings, Bozcaada is the most advantageous station from the point of view of economical and production of wind power.

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