Talep belirsizliğinin Türk imalat firmalarının maliyet yapısı üzerindeki etkisi

Cost rigidity defines the characteristics of cost structure which is defined as the proportion of fixed costs to variable costs of firms. When the proportion of fixed costs are higher than the variable costs, then the cost structure is defined as a rigid cost structure. The structure of operating costs of Turkish manufacturing firms between years 1995 and 2014 is tested in terms of their “rigidity” in this paper. Moreover, the effect of demand uncertainty, as measured by the standard deviation of net sales, on the cost structure of operating costs is also tested. Findings support that higher levels of demand uncertainty are associated with higher portions of fixed costs in the cost structure (i.e., more rigid cost structure). That result contradicts the common wisdom that firms tend to lower the fixed costs in their cost structure as they are confronted with uncertainty

Quasi-Cyclic Complementary Dual Code

LCD codes are linear codes that intersect with their dual trivially. Quasi cyclic codes that are LCD are characterized and studied by using their concatenated structure. Some asymptotic results are derived. Hermitian LCD codes are introduced to that end and their cyclic subclass is characterized. Constructions of QCCD codes from codes over larger alphabets are given

Assessments of energy, macro and micronutrient intakes in children and adolescents with type 1 diabetes mellitus

Objective: This study aims at examining dietary intake in children and adolescents with type 1 diabetes mellitus (DM) and comparing the results with national dietary intake recommendations. Patients and Methods: One hundred fifty children and adolescents (52.7% female) with an average age of 12.2 +/- 3.1 years and with type 1 DM who were followed by the Pediatric Endocrinology Polyclinic participated in the study. Three-day food intake records and clinical information regarding the type 1 DM condition of the participants were obtained. Results: No gender-related significant difference was found among the participants regarding food intake. The percentage of energy derived from fat (average 39.6%) and saturated fat (16.1%) were higher than the recommended levels in both gender groups. The percentage of energy derived from carbohydrates (female 44.1 +/- 5.7%, male 43.0 +/- 6.8%) was below the recommended levels. The dietary fiber intake in children aged 6-10 years with type 1 DM met recommendations, whereas, it was below the recommended levels in other age groups. Micronutrient inadequacy was common in children and adolescents with type 1 DM. Conclusions: The authors believe that guidelines and programs are needed for children and adolescents with type 1 DM to reduce total fat and saturated fat intake, increase carbohydrate and dietary fiber intake up to the recommended levels, and prevent multiple micronutrient inadequacies

Quasi-cyclic subcodes of cyclic codes

We completely characterize possible indices of quasi-cyclic subcodes in a cyclic code for a very broad class of cyclic codes. We present enumeration results for quasi-cyclic subcodes of a fixed index and show that the problem of enumeration is equivalent to enumeration of certain vector subspaces in finite fields. In particular, we present enumeration results for quasi-cyclic subcodes of the simplex code and duals of certain BCH codes. Our results are based on the trace representation of cyclic codes

Okul öncesi Türk çocuklarında obezite risk faktörleri: Kesitsel bir çalışma

Purpose: The present study aims to identify the potential risk factors - pre and post-pregnancy, children's, parental, and environmental factors - concerning obesity in Turkish preschool children.Materials and Methods: The cross-sectional study was conducted with 538 children aged 3-5 and their mothers in 25 private and public kindergartens using a face-to-face survey. Demographic, anthropometric, nutrition, sleep, and physical activity information during pregnancy, infancy, and preschool periods were evaluated. Two-day food records and anthropometric measurements of the children were collected.Results: The prevalence of overweight and obesity in preschool children was found to be 27.0%. Among the 28 potential risk factors examined, pre-pregnancy obesity (odds ratios (OR):1.108, confidence interval (CI): 1.042-1.179), post-pregnancy obesity (OR:4.350, CI: 2.053-9.217), caffeine intake >200 mg/day during pregnancy (OR:1.588, CI:1.031-2.446), father with obesity (OR: 1.089, CI: 1.027-1.155), enrolling a private rather than a public kindergarten (OR: 2.093, CI:1.298-3.376), fast eating (OR:3.355, CI: 1.175-9.583 min), short lunch duration (OR:0.966, CI:0.934-0.998), daily sleep of 2 hours/day (OR:1.560, CI:1.012-2.405) were found to be significantly correlated with obesity in preschool children.Conclusion: Parental obesity, caffeine intake during pregnancy, eating speed, daily sleep, and screen time were determined as obesity risk factors in Turkish preschool children. Identifying maternal and child risk factors in early childhood, regulating lifestyle and obesogenic environment can be protective against obesity.Amaç: Bu çalışma, Türk okul öncesi çocuklarında obezite ile ilgili potansiyel risk faktörlerini -gebelik öncesi ve sonrası, çocuk, ebeveyn ve çevresel faktörler- belirlemeyi amaçlamaktadır. Gereç ve Yöntem: Özel ve devlete bağlı 25 anaokulunda 3-5 yaş grubu 538 çocuk ve anneleri ile yüz yüze görüşme yöntemi kullanılarak kesitsel bir çalışma gerçekleştirilmiştir. Gebelik, bebeklik ve okul öncesi döneme ait demografik, antropometrik, beslenme, uyku ve fiziksel aktivite bilgileri sorgulanmıştır. İki günlük besin tüketim kayıtları ve antropometrik ölçümleri alınmıştır. Bulgular: Okul öncesi çocuklarda hafif şişmanlık ve obezite sıklığı %27 olarak saptanmıştır. Yirmi sekiz potansiyel risk faktöründen gebelik öncesi obezitesi [1,108 (1,042-1,179)], gebelik sonu obezitesi (OR:4,350, CI:2,053- 9,217), gebelikte >200mg/gün kafein alımı (OR:1,588, CI:1,031- 2,446), obezitesi olan babaya sahip olma (OR:1,089 CI:1,027-1,155), devlet okulu yerine özel okula gitme (OR:2,093, CI:1,298-3,376), hızlı yeme (OR:3,355, CI:1,175-9,583), kısa öğle yemeği süresi (OR:0,966, CI:0,934-0,998), günlük uyku süresinin 2 saat ekran süresi (OR:1,560, CI:1,012-2,405) okul öncesi çocukluk obezitesi ile ilişkili bulunmuştur. Sonuç: Ebeveyn obezitesi, gebelikte kafein alımı, yeme hızı, günlük uyku ve ekran süresi Türk okul öncesi çocuklarında obezite risk faktörleri olarak belirlendi. Erken çocukluk döneminde anne ve çocuğa ait risk faktörlerinin belirlenmesi, yaşam tarzının ve obezojenik çevrenin düzenlenmesi, obeziteden koruyucu olabilir

Maintenance of Microbial Cooperation Mediated by Public Goods in Single- and Multiple-Trait Scenarios

Microbes often form densely populated communities, which favor competitive and cooperative interactions. Cooperation among bacteria often occurs through the production of metabolically costly molecules produced by certain individuals that become available to other neighboring individuals; such molecules are called public goods. This type of cooperation is susceptible to exploitation, since nonproducers of a public good can benefit from it while saving the cost of its production (cheating), gaining a fitness advantage over producers (cooperators). Thus, in mixed cultures, cheaters can increase in frequency in the population, relative to cooperators. Sometimes, and as predicted by simple game-theoretic arguments, such increases in the frequency of cheaters cause loss of the cooperative traits by exhaustion of the public goods, eventually leading to a collapse of the entire population. In other cases, however, both cooperators and cheaters remain in coexistence. This raises the question of how cooperation is maintained in microbial populations. Several strategies to prevent cheating have been studied in the context of a single trait and a unique environmental constraint. In this review, we describe current knowledge on the evolutionary stability of microbial cooperation and discuss recent discoveries describing the mechanisms operating in multiple-trait and multiple-constraint settings. We conclude with a consideration of the consequences of these complex interactions, and we briefly discuss the potential role of social interactions involving multiple traits and multiple environmental constraints in the evolution of specialization and division of labor in microbes.info:eu-repo/semantics/publishedVersio

Effect of bilateral and multilateral agreements on Turkey’s export

Bu çalışmada Türkiye’nin tarafı olduğu ikili ve çok taraflı ekonomik ve ticari anlaşmaların, Türkiye’nin 113 ülkeye olan ihracatı üzerinde etkisi olup olmadığı 1996-2006 yılları arası verileri ile Genel Çekim Modeli çerçevesinde test edilmiştir. Sonuç olarak imzalanan ikili anlaşmaların Türkiye’nin ihracatı üzerinde istatistiksel olarak anlamlı bir etkisi bulunmazken, Gümrük Birliği Anlaşmasının dışında Türkiye’nin tarafı olduğu çok taraflı anlaşmaların Türkiye’nin ihracatı üzerinde istatistiksel olarak anlamlı pozitif etkisi olduğu sonucuna varılmıştır.Whether bilateral and multilateral trade and economic agreements has effect on Turkey’s export to 113 countries is tested between 1996-2006 and within Gravity Model framework. Results show that while bilateral agreements has no statistically significant effect on Turkey’s export, except for Customs Union, multilateral agreements have statistically significant and positive effect on Turkey’s export

Halife'nin mesajı

Taha Toros Arşivi, Dosya Adı: Son Halife Abdülmecit Efend

Kosal, sol anahtarıyla uğurlandı

Taha Toros Arşivi, Dosya No: 447/A-Vedat Kosa