Near-field radiation from nano-particles and nano-antennas illuminated with a focused beam of light

The interaction of photons with metallic nanoparticles and nanoantennas yields large enhancement and tight localization of electromagnetic fields in the vicinity of nanoparticles. In the first part of this study, the interaction of a spherical nanoparticle with focused beams of various angular spectra is investigated. This study demonstrates that the focused light can be utilized to manipulate the near-field radiation around nanoparticles. In the second part of this study, the interaction between linearly and radially polarized focused light with prolate spheroidal nanoparticles and nano-antennas is investigated. Strong and tightly localized longitudinal components of a radially polarized focused beam can excite strong plasmon modes on elongated nanoparticles such as prolate spheroids. The effect of a focused beam on parameters such as the numerical aperture of a beam and the wavelength of incident light, as well as particle geometry and composition are also studied

Patient and physician delay in the diagnosis and treatment of non-small cell lung cancer in Turkey

Aim: The early diagnosis and treatment of lung cancer are important for the prognosis of patients withlung cancer. This study was undertaken to investigate patient and doctor delays in the diagnosis andtreatment of NSCLC and the factors affecting these delays.Materials and methods: A total of 1016 patients, including 926 (91.1%) males and 90 (8.9%) females with amean age of 61.5 10.1 years, were enrolled prospectively in this study between May 2010 and May2011 from 17 sites in various Turkish provinces.Results: The patient delay was found to be 49.9 96.9 days, doctor delay was found to be 87.7 99.6 days,and total delay was found to be 131.3 135.2 days. The referral delay was found to be 61.6 127.2 days,diagnostic delay was found to be 20.4 44.5 days, and treatment delay was found to be 24.4 54.9 days.When the major factors responsible for these delays were examined, patient delay was found to be morefrequent in workers, while referral delay was found to be more frequent in patients living in villages(p < 0.05). We determined that referral delay, doctor delay, and total delay increased as the number of doctorswho were consulted by patients increased (p < 0.05). Additionally, we determined that diagnostic andtreatment delays were more frequent at the early tumour stages in NSCLC patients (p < 0.05)

Determination of the Level of Emergency Medicine Resident Physicians to Recognize the Electrocardiography Findings

Abstract Objective: The aim of this study is to determine the accuracy and reliability of the interpretation of electrocardiography (ECG) findings by emergency medicine resident physicians (EMPs) and to provide training recommendations in line with emerging deficiencies. Material and Methods: This research depended on the data from a questionnaire that we conducted among EMPs in Ankara. The survey included multiple-choice questions, selected through conceived cases presented in major textbooks or congresses. EMP ECG assessment levels were compared according to the duration of residency education and the presence of ECG education. The data were evaluated by using the Statistical Package for Social Sciences 17.0 (SPSS Inc., Chicago, IL, USA). Results: A total of 112 volunteers participated. Mean age was 29.6±4.4; also, 47 were female and 65 were male. When all of the questions were taken into account, the mean number of total correct answers was higher for those who had received ECG training than who had not received it, those who underwent more training than those who underwent less training, and those whose duration of assistantship was longer than those whose duration was shorter. Conclusion: The results of our study revealed that the evaluation of ECG is improved by increasing clinical knowledge and training. Depending on these results, we suggest that effective and practical ECG courses and training programs should be organized for EMPs. (JAEM 2014; 13: 108-11

A Research to Determine the Entrepreneurial Tendency of University Students

anemonBir ülkedeki başarılı şirketlerin sayısını ve refah seviyesini arttırmak için, ailede ve eğitim kurumlarında bireylere girişimciliği öğretmek ve onların girişimcilik özelliklerini geliştirmek önemli bir husustur. Bu çalışmada, Mehmet Akif Ersoy Üniversitesi’ndeki öğrencilerin kişisel özellikleri ve girişimcilik başarısını etkileyen unsurların belirlenmesi amaçlanmıştır. Bu çalışmanın diğer bir amacı da katılımcıların yaratıcılık, risk alma eğilimi ve kontrol odaklılığı gibi diğer özelliklerinin belirlenmesidir. Çalışmada ayrıca katılımcıların girişimcilik özelliklerinin girişimcilik eğilimleri üzerindeki etkisinin ölçülmesine çalışılmıştır. Sonuç olarak, katılımcıların girişimcilik eğilimleri olduğu çoğunluğunun girişimci olmak için bir iş fikrine sahip oldukları ve gelecekte bunları uygulamayı istedikleri belirlenmiştir.To increase the number of successful companies and welfare in a country, it is an important issue to teach individuals what the entrepreneurship means, and to develop individuals’ entrepreneurial features in the family and educational institutions. In this study, it is aimed to determine the students’ personal features in Mehmet Akif Ersoy University and the factors affecting the success of entrepreneurs. Also, it is another purpose of this study to determine other features of the students such as creativity, risk-taking ability, and control focality. Finally, it is tried to determine the effect of the students’ entrepreneurial features on the entrepreneurship tendency. In conclusion, it has been determined that the participants have entrepreneurial tendencies, and most of them have an opinion about their entrepreneurial projects, and they desire to apply their opinions as entrepreneurs in the future.28511

Low dose MK-801 protects against iron-induced oxidative changes in a rat model of focal epilepsy

We have used chemiluminescence measurements to examine the relationship between free radical formation and excitotoxicity in a post-traumatic epilepsy model. For this purpose, seven days after injecting iron in rat brain cortices, we measured luminol- and lucigenin-enhanced chemiluminescence in different brain regions (ipsilateral cortex, contralateral cortex, hypothalamus and hippocampus). In all brain regions (except contralateral cortices) both luminol- and lucigenin-enhanced chemiluminescence were increased in iron-injected group compared to saline-injected control group. These increases returned to control values in iron-injected rats pretreated with MK-801. Our results suggest that both free radicals and excitatory amino acids play important roles in the development of post-traumatic epilepsy and that MK-801 has protective effects against iron-induced chemiluminescence formation

Hardgrove Grindability Index Estimation Using Neural Networks

In a previous study, different techniques for the estimation of coal HGI values were investigated (Özbayoğlu et.al, 2008). As continuation of that research, in this study a revised neural network methodology is used for estimating the HGI values using the same data from 163 sub-bituminous coals from Turkey. The parameter set used for estimating HGI consisted of moisture, ash, volatile matter and Rmax ratios. These 4 coal parameters were fed into different neural network topologies. The network parameters were optimized by genetic algorithms. The test results indicate that estimation rate was improved %10-15 over the previous results (Özbayoğlu et.al, 2008) by using this new parameter set and optimized neural network configurations

The role of nitric oxide in the reversal of hemorrhagic shock by oxotremorine

In the present study, the effect of the nitric oxide synthase inhibitor, N(G)-nitro-L-arginine methylester (L-NAME), on the antishock actions of oxotremorine was investigated in rats subjected to hemorrhagic shock under urethane anesthesia. L-citrulline production in the AV3V region, as an indicator of nitric oxide (NO) synthesis, was assayed by high-performance liquid chromatography (HPLC) with fluorescent detection throughout the experiment. The rats were pretreated with either intravenous (i.v.) physiological saline or L-NAME (2.5 mg/kg) before bleeding. L-NAME potentiated the reversal of hypotension by oxotremorine (25 microg/kg, i.v.). However, oxotremorine either alone or in combination with L-NAME did not produce any significant change in 60-min survival rate at this low dose. Analysis of microdialysis samples collected from the AV3V region showed that L-citrulline concentration increased during bleeding and that this increase was abolished by L-NAME pretreatment. These results may suggest that nitric oxide production contributes to hypotension in rats bled to shock since nitric oxide levels in the AV3V region increased in response to bleeding and nitric oxide synthase (NOS) inhibition abolished this increase and potentiated the oxotremorine-induced reversal of hypotension