TAUBERIAN THEOREMS FOR THE WEIGHTED MEAN METHOD OF SUMMABILITY OF INTEGRALS

Let $q$ be a positive weight function on $\mathbf{R}_{+}:=[0, \infty)$ which is integrable in Lebesgue's sense over every finite interval $(0,x)$ for $00$, $Q(0)=0$ and $Q(x) \rightarrow \infty$ as $x \to \infty$.Given a real or complex-valued function $f \in L^{1}_{loc} (\mathbf{R}_{+})$, we define $s(x):=\int_{0}^{x}f(t)dt$ and$$\tau^{(0)}_q(x):=s(x), \tau^{(m)}_q(x):=\frac{1}{Q(x)}\int_0^x \tau^{(m-1)}_q(t) q(t)dt\,\,\, (x>0, m=1,2,...),$$provided that $Q(x)>0$. We say that $\int_{0}^{\infty}f(x)dx$ is summable to $L$ by the $m$-th iteration of weighted mean method determined by the function $q(x)$, or for short, $(\overline{N},q,m)$ integrable to a finite number $L$ if$$\lim_{x\to \infty}\tau^{(m)}_q(x)=L.$$In this case, we write $s(x)\rightarrow L(\overline{N},q,m)$. It is known thatif the limit $\lim _{x \to \infty} s(x)=L$ exists, then $\lim _{x \to \infty} \tau^{(m)}_q(x)=L$ also exists. However, the converse of this implicationis not always true. Some suitable conditions together with the existence of the limit $\lim _{x \to \infty} \tau^{(m)}_q(x)$, which is so called Tauberian conditions, may imply convergence of $\lim _{x \to \infty} s(x)$. In this paper, one- and two-sided Tauberian conditions in terms of the generating function and its generalizations for $(\overline{N},q,m)$ summable integrals of real- or complex-valued functions have been obtained. Some classical type Tauberian theorems given for Ces\`{a}ro summability $(C,1)$ and weighted mean method of summability $(\overline{N},q)$ have been extended and generalized. 

Regression Analysis of Value Preferences for Liking Children Attitude of Primary and Secondary Education Teacher Candidates

The main purpose of the research is to determine the degree to which the value preferences of the teacher candidates predicts their liking children attitudes. In this research, "Dilmaç and Arıcak Values Scale" developed by Dilmaç and Arıcak (2012) was used to determine the value orientations of teacher candidates and "Barnett Liking of Children Scale (BLOCS)" developed by Barnett and Sinisi (1990) was used to determine liking children attitudes. The study group of the research which is in the screening model constitutes 264 teacher candidates who are studying at Ahmet Keleşoğlu Education Faculty of Necmettin Erbakan University in 2012-2013 school year. The data were analyzed by SPSS 18.0 statistical package program. According to the findings of the research, it is found that there are significant differences in social, career and intellectual values according to gender; in the values of spiritual, materialistic, human dignity, romance, freedom, futuwwa and the scores obtained from Barnett Children's Love Scale show no significant differences according to gender. It is found that there is no significant difference according to the department in the values of social, career, intellectual, spiritual, materialistic, romantic, freedom, futuwwa values and the scores obtained from Barnett Child Love Scale but only in the human dignity value there is a significant difference. According to age variable; there is a negative meaningful relationship between age and social, career values sub-dimensions and positive meaningful relationship between age and romantic values sub-dimension. Regression analysis revealed that subscales of social, career, intellectual, spiritual, human dignity, freedom, and futuwwa values are found to be important predictors of children liking attitudes of teacher candidates. Keywords: Children Liking, Valu

Congestion window-based adaptive burst assembly for TCP traffic in OBS networks

Burst assembly is one of the key factors affecting the TCP performance in optical burst switching (OBS) networks. When the TCP congestion window is small, the fixed-delay burst assembler waits unnecessarily long, which increases the end-to-end delay and thus decreases the TCP goodput. On the other hand, when the TCP congestion window becomes larger, the fixed-delay burst assembler may unnecessarily generate a large number of small-sized bursts, which increases the overhead and decreases the correlation gain, resulting in a reduction in the TCP goodput. In this paper, we propose adaptive burst assembly algorithms that use the congestion window sizes of TCP flows. Using simulations, we show that the usage of the congestion window size in the burst assembly algorithm significantly improves the TCP goodput (by up to 38.4% on the average and by up to 173.89% for individual flows) compared with the timerbased assembly, even when the timer-based assembler uses the optimum assembly period. It is shown through simulations that even when estimated values of the congestion window size, that are obtained via passive measurements, are used, TCP goodput improvements are still close to the results obtained by using exact values of the congestion window. © Springer Science+Business Media, LLC 2010

Acute ST-segment elevation myocardial infarction from a centipede bite

Acute myocardial infarction (AMI) following a centipede bite has been very rarely reported. Here, we describe a 22 year-old man who had ST-segment elevation AMI after a centipede bite. He presented with typical chest pain, electro and echocardiographic abnormalities, and elevated cardiac enzymes with normal coronary angiography. The probable mechanisms were described. Practitioners treating centipede bites shall not consider it lightly, as centipede envenomation may produce a variety of systemic and local manifestations in susceptible individuals

Tribological behaviour of microalloyed and conventional C–Mn rail steels in a pure sliding condition

This paper compares the tribological behaviour of microalloyed rail steel with conventional C–Mn rail steel under different test conditions (load, temperature and humidity). Pin-on-disc tribological tests were performed inside a climate chamber under different loads (20, 30 and 40 N), relative humidity (15, 55 and 70%) and temperatures (20 and 40 ℃). After the friction and wear tests, the worn surfaces were analysed using both confocal and scanning electron microscopies. The results obtained show that the use of microalloyed steel in railway applications under severe conditions (high loads and humidity) could lead to increased service life of the rails and could extend the time between maintenance operations

Subunit-dependent modulation of septin assembly: Budding yeast septin Shs1 promotes ring and gauze formation

Substitution of specific terminal subunits within septin complexes and septin phosphorylation drive the formation of distinct higher-order septin assemblies in budding yeast

A FRET-based method for monitoring septin polymerization and binding of septin-associated proteins

Much about septin function has been inferred from in vivo studies using mainly genetic methods, and much of what we know about septin organization has been obtained through examination of static structures in vitro primarily by electron microscopy. Deeper mechanistic insight requires real-time analysis of the dynamics of the assembly of septin-based structures and how other proteins associate with them. We describe here a Förster resonance energy transfer (FRET)-based approach for measuring in vitro the rate and extent of filament formation from septin complexes, binding of other proteins to septin structures, and the apparent affinities of these interactions. FRET is particularly well suited for interrogating protein-protein interactions, especially on a rapid timescale; the spectral change provides an unambiguous indication of whether two elements within the system under study are associating and serves as a molecular-level "ruler" because it is very sensitive to the separation between the donor and acceptor fluorophores over biologically relevant distances (≤10nm). The necessary procedures involve generation of appropriate cysteine-less and single cysteine-containing septin variants, expression and purification of the heterooctameric complexes containing them, efficient labeling of the purified complexes with desired fluorophores, fluorimetric measurement of FRET, and appropriate safeguards and controls in data acquisition and analysis. Our methods can be used to interrogate the effects of buffer conditions, small molecules, and septin-binding proteins on septin filament assembly or stability; determine the effect of alternative septin subunits, mutational alterations, or posttranslational modifications on assembly; and, delineate the location of septin-binding proteins

Assembly, molecular organization, and membrane-binding properties of development-specific septins

Septin complexes display remarkable plasticity in subunit composition, yet how a new subunit assembled into higher-order structures confers different functions is not fully understood. Here, this question is addressed in budding yeast, where during meiosis Spr3 and Spr28 replace the mitotic septin subunits Cdc12 and Cdc11 (and Shs1), respectively. In vitro, the sole stable complex that contains both meiosis-specific septins is a linear Spr28–Spr3–Cdc3–Cdc10–Cdc10–Cdc3–Spr3–Spr28 hetero-octamer. Only coexpressed Spr3 and Spr28 colocalize with Cdc3 and Cdc10 in mitotic cells, indicating that incorporation requires a Spr28-Spr3 protomer. Unlike their mitotic counterparts, Spr28-Spr3–capped rods are unable to form higher-order structures in solution but assemble to form long paired filaments on lipid monolayers containing phosphatidylinositol-4,5-bisphosphate, mimicking presence of this phosphoinositide in the prospore membrane. Spr28 and Spr3 fail to rescue the lethality of a cdc11Δ cdc12Δ mutant, and Cdc11 and Cdc12 fail to restore sporulation proficiency to spr3Δ/spr3Δ spr28Δ/spr28Δ diploids. Thus, specific meiotic and mitotic subunits endow septin complexes with functionally distinct properties

ULUSAL TRAVMA VE ACIL CERRAHI DERGISI-TURKISH JOURNAL OF TRAUMA & EMERGENCY SURGERY

BACKGROUND: Currently, the measurement of optic nerve sheath diameter (ONSD) has been offered as a possible indicator of intracranial pressure (ICP). Increased ICP is observed during intracranial injury. The objective of this study was to evaluate the relationship between increased ONSD and positive intracranial findings from multislice computed tomography (CT) of the brain. METHODS: In total, CT scans of 161 patients were retrospectively reviewed. The image that showed the largest ONSD was magnified five times. RESULTS: The CT scan revealed intracranial lesions in 54 patients and no intracranial lesions in 107 patients. A significant relationship was observed between positive CT findings and increased ONSD: 5.60 +/- 0.75 mm vs. 5.35 +/- 0.75 mm (p=0.038). The area under the receiver operating characteristic curve was 0.600 (95% confidence interval, 0.508-0.692; p= 5.0 mm had a sensitivity and specificity of 80% and 36%, respectively. CONCLUSION: This study demonstrated a significant yet poor relationship between intracranial injury and increased ONSD from the multislice CT scan. Severe structural changes in the brain and trauma that causes bleeding have only limited effects on the extension of the optic nerve