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NEW THEOREM ON SYMMETRIC FUNCTIONS AND THEIR APPLICATIONS ON SOME (p, q)-NUMBERS
SABA, N.,BOUSSAYOUD, A. The Korean Society for Computational and Applied M 2022 Journal of applied mathematics & informatics Vol.40 No.1-2
In this paper, we present and prove an new theorem on symmetric functions. By using this theorem, we derive some new generating functions of the products of (p, q)-Fibonacci numbers, (p, q)-Lucas numbers, (p, q)-Pell numbers, (p, q)-Pell Lucas numbers, (p, q)-Jacobsthal numbers and (p, q)-Jacobsthal Lucas numbers with Chebyshev polynomials of the first kind.
[ ] System: Structural Study of the Influence of Luminescence Center Concentration
Rabanal M.E.,Gomez L.,Khalifa A.,Mancic L.,Milosevic O.,Torralba J.M. 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
The influence of doping on the structural and morphological properties of the phosphor system, obtained ultrasonically via Spray Pyrolysis from common gadolinium and europium nitrate solutions, was studied. The particle morphology, crystalline and chemical structure were studied by XRD, SEM and EDS. TEM was applied in order to identify the structure and growth of "primary nanoparticles" and determine the presence of domains locally affected by "Moires Frames" and "Crystallite Size". The SADP allows determining the presence of a polycrystalline material with two phases in the "as-prepared" samples, and only an Ia3 phase along the thermal treatment.
필러재료의 변화에 따른 NR-SBR 타입 엘라스토머 기반 고무재료의 기계적물성
Saban Bulbul,Mustafa Yasar,Nuretttin Akcakale 한국고분자학회 2014 폴리머 Vol.38 No.5
The effects of different filling materials and stabilizers in polymer based materials that are used as shoe solesin the shoemaking industry on the mechanical properties (strength, failure, tensile, tearing, bending etc.) of the final products have been examined in this study. Natural rubber (NR RSS3) and styrene-butadiene rubber (SBR 1502) were used as the main matrix material. New compounds were formed by replacing the fillings in the general compound of the existing factory (SiO2, CaCO3) with 40% (1200 g) blast furnace flue dust, rice husk, reclaimed rubber (recycled) and woodash. Comparison of the new compounds with the existing compounds revealed a decrease in hardness, density, dimension stability, bending, tearing, % elongation and failure strength and an increase in wearing.
Green manure amendment enhances microbial activity and diversity in antibiotic-contaminated soil
Caban, Jiff Randy,Kuppusamy, Saranya,Kim, Jang Hwan,Yoon, Young-Eun,Kim, Song Yeob,Lee, Yong Bok Elsevier 2018 Applied soil ecology Vol.129 No.-
<P><B>Abstract</B></P> <P>The impacts of antibiotics on soil microbial activity and community structure are poorly understood. It is also important to identify strategies to reduce the problems that antibiotics inflict on soil biology. Hence, for the first time, this study investigated the effect of sulfathiazole (STZ) on soil microbial activity (measured in terms of dehydrogenase activity) and bacterial community structure (revealed by pyrosequencing analysis) in antibiotics contaminated soils (10 and 100 mg STZ kg<SUP>−1</SUP> soil), and treated with (in)organic amendments (NPK, compost and hairy vetch). Dehydrogenase activity was significantly higher in the hairy vetch amended soils (with and without STZ). Pyrosequencing analysis revealed a concentration dependent impact of antibiotics on soil microbial richness and diversity. <I>Proteobacteria</I> and <I>Actinobacteria</I> were present in greater proportions even in soils with a high antibiotic concentration of 100 mg kg<SUP>−1</SUP>. With 10 mg kg<SUP>−1</SUP> STZ, the effect on microbial community richness and diversity was minimal. Meanwhile, with 100 mg kg<SUP>−1</SUP> STZ, the disappearance of <I>Verrucomicrobia, Bacteroidetes and Planctomycetes</I> was observed. Even with a high antibiotic spiking concentration, a tremendous increase in the relative abundance of <I>Firmicutes</I> was seen in the hairy vetch amended soils which led to a considerably higher Gram-positive proportion than the compost and NPK treatments. We conclude that utilization of green manure (cover crop – hairy vetch) can be considered a viable strategy for safer crop production in antibiotic-contaminated soils. This is because it enhances soil microbial/enzyme activity, bacterial richness and diversity, notably the population of beneficial Gram-positive bacteria.</P>
Legendre trajectories of trans-$S$-manifolds
Saban Guvenc 대한수학회 2022 대한수학회보 Vol.59 No.1
In this paper, we consider Legendre trajectories of trans-$S$-manifolds. We obtain curvature characterizations of these curves and give a classification theorem. We also investigate Legendre curves whose Frenet frame fields are linearly dependent with certain combination of characteristic vector fields of the trans-$S$-manifold.
Caban-Martinez, Alberto J.,Kropa, Bob,Niemczyk, Neal,Moore, Kevin J.,Baum, Jeramy,Solle, Natasha Schaefer,Sterling, David A.,Kobetz, Erin N. Occupational Safety and Health Research Institute 2018 Safety and health at work Vol.9 No.3
Hazardous work zones (i.e., hot, warm, and cold) are typically established by emergency response teams during hazardous materials (HAZMAT) calls but less consistently for fire responses to segment personnel and response activities in the immediate geographic area around the fire. Despite national guidelines, studies have documented the inconsistent use of respiratory protective equipment by firefighters at the fire scene. In this case-series report, we describe warm zone gas levels using multigas detectors across five independent fire incident responses all occurring in a large South Florida fire department. Multigas detector data collected at each fire response indicate the presence of sustained levels of volatile organic compounds in the "warm zone" of each fire event. These cases suggest that firefighters should not only implement strategies for multigas detector use within the warm zone but also include respiratory protection to provide adequate safety from toxic exposures in the warm zone.
Meningitis Due to Bacillus Anthracis
Saban Gurcan,Filiz Akata,Figen Kuloglu,Sevinc Erdogan,Murat Tugrul 연세대학교의과대학 2005 Yonsei medical journal Vol.46 No.1
The first case of haemorrhagic meningitis due to Bacillus anthracis in the European part of Turkey is reported here. B. anthracis, sensitive to penicillin, was isolated from the cerebrospinal fluid and blood cultures. Although appropriate therapy was administered, the patient died two days after hospitalization.
Lactobacillus reuteri DSM 17938 Improves Feeding Intolerance in Preterm Infants
Kaban, Risma K.,Wardhana, Wardhana,Hegar, Badriul,Rohsiswatmo, Rinawati,Handryastuti, Setyo,Amelia, Novie,Muktiarti, Dina,Indrio, Flavia,Vandenplas, Yvan The Korean Society of Pediatric Gastroenterology 2019 Pediatric gastroenterology, hepatology & nutrition Vol.22 No.6
Purpose: Feeding tolerance is extremely important in preterm infants. This study aimed to evaluate whether preterm infants receiving Lactobacillus reuteri DSM 17938 would develop fewer symptoms of feeding intolerance. Secondary outcomes were duration of parenteral nutrition, time to reach full feeding, length of hospital stay, sepsis, necrotizing enterocolitis (NEC), diarrhea, and mortality. Methods: This double-blind randomized controlled trial of L. reuteri DSM 17938 versus placebo included 94 neonates with a gestational age of 28-34 weeks and birth weight of 1,000-1,800 g. Results: Feeding intolerance (vomiting and/or distension) was less common in the probiotic group than in the placebo group (8.5% vs. 25.5%; relative risk, 0.33; 95% confidence interval, 0.12-0.96; p=0.03). No significant intergroup differences were found in proven sepsis, time to reach full feeding, length of hospital stay, or diarrhea. The prevalence of NEC (stages 2 and 3) was 6.4% in the placebo group vs. 0% in the probiotic group (relative risk, 1.07; 95% confidence interval, 0.99-1.15; p=0.24). Mortality rates were 2.1% in the probiotic group and 8.5% in the placebo group, p=0.36). Conclusion: The administration of L. reuteri DSM 17938 to preterm infants was safe and significantly reduced feeding intolerance. No significant differences were found in any other secondary outcomes.
An Outbreak of Tularemia in Western Black Sea Region of Turkey
Saban Gurcan,Muserref Tatman-Otkun,Metin Otkun,Osman Kursat Arikan,Burcin Ozer 연세대학교의과대학 2004 Yonsei medical journal Vol.45 No.1
The aim of this study was to investigate the source and the size of a tularemia outbreak in a village located in a non-endemic area. Five patients from the same village were admitted to hospital with the same complaints all within one week of September 2001. Tularemia was suspected and a diagnosis was made after physical and anamnesis examinations. The village was visited the same week that the patients were admitted to the hospital, in the January and April 2002. The villagers were examined and screened serologically by microagglutination method and the water sources were investigated bacteriologically. A total of 14 people were found to be infected from the outbreak and the oropharyngeal form was the only clinical presentation. Antibody titers ranged between 1:80 and 1:640. The patients responded well to the aminoglycoside plus tetracycline therapy. Examination of the pipewater and three springs revealed that all the water sources were contaminated by coliforms, however, Francisella tularensis could not be isolated in glucose-cystine medium. Antibody levels stayed stable or decreased seven months after. Tularemia had not been reported in this area before, so the first patients were misdiagnosed. In conclusion tularemia should be considered in differential diagnosis of patients with fever, sore throat and cervical lymphadenopaties.