170 research outputs found
Selectivity for dimers in pentene oligomerization over acid zeolites
No full textThe reactions of 1-pentene over acid zeolites were investigated in the liquid phase at 473 K. The primary reactions were isomerization, dimerization, and subsequent cracking of dimers. Zeolites consisting of only 10-membered (MFI) or 12-membered rings (FAU, BEA) behaved similarly, with dimerization and subsequent cracking products observed. Zeolites possessing 8-membered ring pores (MOR, FER) showed very different selectivity from each other and from other zeolites. MOR showed almost complete conversion of C10 olefins, such that hexene and butene from cracking were the dominant products. FER showed high activity and selectivity for dimerization, with very small amounts of cracking products observed.Peer reviewe
Men’s belief in sexual myths and factors effecting these myths
No full textAmaç: Cinsel mitler, kişilerin cinsel konularda doğru olduğunu düşündükleri, çoğu zaman abartılı, yanlış, bilimsel değeri bulunmayan inanışlardır. Bu araştırmanın amacı, erkeklerde sık görülen cinsel mitlere inanma yaygınlığının ve cinsel mitlere inanmayı etkileyen değişkenlerin belirlenmesidir. Yöntem: Araştırmaya 167 erkek katılmıştır. Verilerin ilk bölümü sosyodemografik özellikler ve cinsel öykü ile ilgili soruları, ikinci bölümü ise 30 soruluk Cinsel Mit Değerlendirme Formunu içeren anket formunu kapsamaktadır. Bulgular: Cinsel mitlere inanma yaygındır. Medeni durum, eğitim düzeyi, ergenlik öncesi yaşanılan bölge, ilk cinsel bilgi kaynağı ve ilk cinsel ilişki sonucunun cinsel mitlere inanmayı etkilediği saptanmıştır. Sonuçlar: Bulgularımıza dayanarak, erkeklerde de cinsel mitlere inanmanın yüksek düzeylerde olmasını, toplumda var olan cinsellikle ilgili bilgilerin eksikliği ya da yanlışlığı ile açıklayabiliriz. Daha fazla katılımcı ile daha genellenebilir çalışmaların yapılması, toplum tabanlı cinsel eğitimlerin planlaması için yol gösterici olacaktır.Objective: Sexual myths are often exaggerated, incorrect and unscientific ideas on sexuality that people believe to be true. The aim of this study is to determine the acceptance rate of common sexual myths and related factors among men. Method: Data was collected from 167 voluntary males (18-67 years). A structured interview including sociodemographic characteristics and sexual myth questionnaire investigating 30 common sexual myths was carried out with the participants. Result: There are numerous myths regarding sexuality in our study population. It was found that marital status, educational level, region lived until adolescence (sub-district and village or province and district), first source for sexual information and result of the first sexual relationship influence rates of belief for sexual myths. Conclusion: High levels of belief in sexual myths among males in our study group can be interpreted as a result of inadequate sexual education in the society. We believe that further larger scale population studies might be beneficial for planning sexual education in our society
Spontan Gerileme Gösteren Ekstrude Lomber Disc Hernisi: Vaka Sunumu
No full textL5-S1 seviyesinde spontan gerileme gösteren ekstrude lomber disk herniasyonu vaka olarak sunulmuştur. Gerileme gösteren disk herniasyonu, manyetik rezonans görüntüleme yöntemleriyle gösterilmiştir. Bu sürecin altında yatan muhtemel mekanizmalar tartışılmıştır.case of spontaneous regression of an extruded lumbar disc herniation at the L5-S1 level is presented. The regression of the disc herniation was documented on MRI studies. We discuss the possible underlying mechanisms of this process
Parental Alienation Syndrome
No full textChildren who have been programmed by one parent to be alienated from the other parent are commonly seen in the context of child-custody disputes. Its primary manifestation is the child’s campaign of denigration against a parent, a campaign that has no justification. It is said to result from a combination of a programming (brainwashing) parent’s indoctrinations and the child’s own contributions to the vilification of the targeted parent. Many evaluators use the term parental alienation syndrome to refer to the disorder engendered in such children. However, there is significant controversy going on about the validity of parental alienation syndrome. The purpose of this article has been to describe and help to differentiate parental alienation syndrome and abuse for mental health professionals working in the field, and discuss the arguments about the validity of this syndrome
Vaccination against pandemic influenza A/H1N1 among healthcare workers and reasons for refusing vaccination in Istanbul in last pandemic alert phase
No full textRisk assessment in mice and men
No full textUncertainty is a ubiquitous property of both physical and mental realms. Goal-directed actions that take place under these conditions thus probabilistically predict their consequences. Traditional decision-making research has shown that particularly humans are non-normative decision-makers under uncertainty. On the other hand, considering the cognitive system as an output of evolutionary history, it is not unlikely that it models the uncertainties that partly determine the consequences of its actions. It is also natural to assume that the same system uses these models of uncertainty originating from multiple stochastic processes along with its metric representation of the consequences in planning its actions. Indeed, more recent research has shown closer to optimal performance in decision-making tasks in which the uncertainty was experienced and/or originated from the sensori-motor system. In this research, we investigated this very process in the context of temporal decision-making in both human and mice subjects. We further used this experimental context to answer the essential questions regarding the functional architecture of mind. This questioning specifically targeted the degree of representational and computational power needed to account for decision-making under uncertainty. In order to answer this question, we conducted computer simulations providing different degrees of representational substitution/power and compared their outputs to the empirical data. We conclude that both human and mice are optimal decision-makers under uncertainty that originates from extrinsic and intrinsic (mental) stochastic processes and observed performance can be better explained by information-processing rather than associative frameworks of mind.Ph.D.Includes bibliographical references (p. 153-157)
Fortune at the Bottom of the Pyramid: An Alternative Perspective
No full textThe Bottom of the Pyramid (BOP) has emerged as one of the dominant ideas in business. Cognizant of the overwhelming attention BOP has attracted and its potential impact on the billions of the poor and on managerial practices, the author analyzes the different aspects of BOP approach on how large corporations can serve low income customers profitably. An attempt is made to provide an alternate perspective on the BOP concept. I argue for the facilitation of selective consumption by the poor by avoiding their undesirable inclusion (marketing products that are not likely to enhance their wellbeing or products that are likely to be abused by them) and exclusion (not offering products that are likely to enhances their wellbeing) in target market selection decisions by the private sector organizations. A framework is presented for assessing the appropriateness of large corporations’ participation in BOP markets. I also emphasize the need to strengthen the role of the poor as a producer for rapid poverty alleviation.
Healthcare workers as parents: attitudes toward vaccinating their children against pandemic influenza A/H1N1
No full textAbstract Background Both the health care workers (HCWs) and children are target groups for pandemic influenza vaccination. The coverage of the target populations is an important determinant for impact of mass vaccination. The objective of this study is to determine the attitudes of HCWs as parents, toward vaccinating their children with pandemic influenza A/H1N1 vaccine. Methods A cross-sectional questionnaire survey was conducted with health care workers (HCWs) in a public hospital during December 2009 in Istanbul. All persons employed in the hospital with or without a health-care occupation are accepted as HCW. The HCWs who are parents of children 6 months to 18 years of age were included in the study. Pearson's chi-square test and logistic regression analysis was applied for the statistical analyses. Results A total of 389 HCWs who were parents of children aged 6 months-18 years participated study. Among all participants 27.0% (n = 105) reported that themselves had been vaccinated against pandemic influenza A/H1N1. Two third (66.1%) of the parents answered that they will not vaccinate their children, 21.1% already vaccinated and 12.9% were still undecided. Concern about side effect was most reported reason among who had been not vaccinated their children and among undecided parents. The second reason for refusing the pandemic vaccine was concerns efficacy of the vaccine. Media was the only source of information about pandemic influenza in nearly one third of HCWs. Agreement with vaccine safety, self receipt of pandemic influenza A/H1N1 vaccine, and trust in Ministry of Health were found to be associated with the positive attitude toward vaccinating their children against pandemic influenza A/H1N1. Conclusions Persuading parents to accept a new vaccine seems not be easy even if they are HCWs. In order to overcome the barriers among HCWs related to pandemic vaccines, determination of their misinformation, attitudes and behaviors regarding the pandemic influenza vaccination is necessary. Efforts for orienting the HCWs to use evidence based scientific sources, rather than the media for information should be considered by the authorities.</p
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