27 research outputs found
Sparse Representation-based Dictionary Learning Methods for Hyperspectral Super-Resolution
No full text24th Signal Processing and Communication Application Conference (SIU) -- MAY 16-19, 2016 -- Zonguldak, TURKEYDue to hardware limitations, hyperspectral imagery has low spatial resolution. It can be obtained super-resolution hyperspectral imagery by means of sparse representation-based methods that are designed for improving spatial resolution. In this paper, the effect of sparse representation-based dictionary learning algorithms including K-SVD, ODL and Bayes on obtaining superresolution images with low error and high quality has been investigated. The method with best results has been identified.IEEE, Bulent Ecevit Univ, Dept Elect & Elect Engn, Bulent Ecevit Univ, Dept Biomed Engn, Bulent Ecevit Univ, Dept Comp Eng
Depression and anxiety among medical students: Examining scores of the beck depression and anxiety inventory and the depression anxiety and stress scale with student characteristics
No full textTo evaluate the psychological well-being of medical students a relatively new self-report questionnaire (the depression, anxiety, and stress scale) was used alongside an established instrument (the beck depression and anxiety inventories) in a group of medical students. A total of 928 medical students (49.4% female; 50.6% male) participated voluntarily into this cross-sectional study. Students completed the Turkish versions of the depression anxiety stress scale (DASS), beck depression, and anxiety inventories together with a questionnaire about their socio-demographic characteristics. Mild and moderate levels of depression were found in 30.5% and severe and extremely severe levels of depression in 8.5% of students. Mild and moderate levels of anxiety and stress were present in 35.8% of the participants. Depression and anxiety were more frequently reported by female students. Depression was more frequent among first-year students, students in a poor economic situation and those who were not satisfied with their medical education. The frequency of depression and anxiety were seen to decrease with increasing grades. Bland and Altman plots showed an agreement between beck inventories and depression, anxiety, and stress scales, whereas the agreement between anxiety scales was found to be better than that of depression scales. Depression and anxiety are seen frequently among medical students in Turkey. The psychological distress was influenced only to a modest degree by traditional socio-demographic characteristics. Either the traditional beck inventories or the newer depression anxiety and stress scales can be used for non-clinical screening purposes in individuals
Examining Cronbach Alpha, Theta, Omega Reliability Coefficients According to Sample Size
No full textDifferentiations according to the sample size of different reliability coefficients are examined. It is concluded that the estimates obtained by Cronbach alpha and teta coefficients are not related with the sample size, even the estimates obtained from the small samples can represent the population parameter. However, the Omega coefficient requires large sample sizes
MISUSAGE OF STATISTICS IN MEDICAL RESEARCH
No full textThe inappropriate use of statistical method and technique cause time and cost losts and it can be misleading to other scientific researhes. So in this study the main statistical error sources in medical research are discussed and aimed to be informative for researchers. The most common statistical error sources are determined examining the previous medical researches and taking errors into account occured in researches during statistical consulting. Inappropriate use of statistics can be found in every stage of a medical research related to data analysis; design of the experiment, data collection and pre-processing, analysis method and implementation, and interpretation. We listed several error sources that researchers easily commit if they are lack of solid statistical background. The mistakes in the studies mostly occur because of the researchers' lack of statistical knowledge and since they don't take statistical consulting. Unbiased, consistent, and efficient parameter estimates are made in statistics science. This can be provided using statistics from the planning until the end of the study. So it is neccessary to consult statisticians at each stage of the studies
Statistical Reasoning of Impact of Motivation on Students’ Achievement in Foreign Language Learning
No full textAbstractThis research focuses on statistical reasoning in motivation issues in learning a foreign language. The opinions of university students studying at different departments and taking a foreign language course have been investigated through 43 statements related to motivation issues in order to find out their opinions on motivation sources in general, classroom motivation sources and motivation problems that arise or they encounter during their foreign language studies. The responses of participants through all the statements were in very close line with each other, without revealing any significant difference. The relation between the participants achievement level in foreign language courses and motivation revealed contradiction as the respondents claim lack of motivation but have a achievement level over the minimum pass level. This result reveals that in terms of statistical reasoning there is a contradiction between negative motivation and positive achievement
A comparative study of dermatophyte infections in Bursa, Turkey
No full textA total of 555 specimens from 372 patients with symptoms compatible with superficial mycosis were included in this study. Those from patients clinically diagnosed as having dermatomycosis were thoroughly investigated by mycological examinations in the laboratory, including microscopic studies of KOH mounts and cultivation of the samples in culture. The results of this study and a previous study in our hospital conducted in 1980 were compared with respect to clinical presentation and etiological agents. Onychomycosis was the most common clinical form of dermatomycoses, and Trichophyton rubrum was the most common pathogen in this study
Misusage Of Statistics In Medical Research
No full textThe inappropriate use of statistical method and technique cause time
and cost losts and it can be misleading to other scientific researhes.
So in this study the main statistical error sources in medical research
are discussed and aimed to be informative for researchers. The most
common statistical error sources are determined examining the previous
medical researches and taking errors into account occured in researches
during statistical consulting. Inappropriate use of statistics can be
found in every stage of a medical research related to data analysis;
design of the experiment, data collection and pre-processing, analysis
method and implementation, and interpretation. We listed several error
sources that researchers easily commit if they are lack of solid
statistical background. The mistakes in the studies mostly occur
because of the researchers’ lack of statistical knowledge and
since they don’t take statistical consulting. Unbiased,
consistent, and efficient parameter estimates are made in statistics
science. This can be provided using statistics from the planning until
the end of the study. So it is neccessary to consult statisticians at
each stage of the studies
Mental health and quality of life in patients with chronic otitis media
No full textThe present study focused on the comparison of mental health and quality of life (QoL) between chronic otitis media (COM) patients and the hearing population. The patients with chronic otitis media and healthy control group were enrolled in the study. The duration and severity of the auditory impairment were recorded. In addition to hearing loss (HL), the findings of each patient's other ear disorders (ear discharge and tinnitus) were also recorded. In both the groups, psychological symptom profile and health-related QoL were evaluated and compared using a sociodemographic questionnaire, the Symptom Check List 90-Revised Form (SCL-90-R), and the Short Form-36 (SF-36). According to SCL-90-R, somatization (p < 0.001), interpersonal sensitivity (p < 0.001), depression (p < 0.001), phobic anxiety (p < 0.001), and other subscores, and also global severity index score (p < 0.001) were significantly high in patient group when compared to the control group. The patients with COM reported significantly lower levels of QoL in terms of physical role difficulty (p < 0.001), general health perception (p < 0.004), social functioning (p < 0.001), and mental health (p < 0.017) than those of control subjects. Our results indicated that COM patients with mild or moderate HL have poorer life quality and higher psychological problems. Psychological well being should be also considered in assessment of COM patients in addition to the clinical evaluation and audiological tests
Evaluation of Plasma Melatonin Levels in Children With Afebrile and Febrile Seizures
No full textBACKGROUND: Melatonin modulates central nervous system neuronal activity. We compared the melatonin levels of patients with febrile and afebrile seizures during and after seizure with those of healthy controls. METHODS: We enrolled 59 individuals with afebrile and febrile seizures (mean age, 6.09 +/- 4.46 years) and 28 age-, sex-, and weight-matched healthy children. Melatonin levels were measured near the time of a seizure (0 to 1 hour) and at 12 and 24 hours post-seizure, and control melatonin levels were measured from a single venous blood sample. RESULTS: Plasma melatonin levels increased during seizures in the study group (P < 0.001). Post-seizure plasma melatonin levels were significantly lower in the study group than in the control group (P < 0.05). Plasma melatonin levels did not differ between patients with afebrile seizures who had and had not used antiepileptic drugs. Daytime (8 AM to 8 PM) and nighttime (8 PM to 8 AM) post-seizure melatonin levels were not significantly different. CONCLUSIONS: Melatonin levels were lower in pediatric patients prone to seizures than in healthy children and increased during seizures. Further research is needed to test the role of melatonin in the pathophysiology and treatment of epilepsy. (C) 2016 Elsevier Inc. All rights reserved
Misusage Of Statistics In Medical Research
No full textThe inappropriate use of statistical method and technique cause time
and cost losts and it can be misleading to other scientific researhes.
So in this study the main statistical error sources in medical research
are discussed and aimed to be informative for researchers. The most
common statistical error sources are determined examining the previous
medical researches and taking errors into account occured in researches
during statistical consulting. Inappropriate use of statistics can be
found in every stage of a medical research related to data analysis;
design of the experiment, data collection and pre-processing, analysis
method and implementation, and interpretation. We listed several error
sources that researchers easily commit if they are lack of solid
statistical background. The mistakes in the studies mostly occur
because of the researchers’ lack of statistical knowledge and
since they don’t take statistical consulting. Unbiased,
consistent, and efficient parameter estimates are made in statistics
science. This can be provided using statistics from the planning until
the end of the study. So it is neccessary to consult statisticians at
each stage of the studies
