Maruzat üstüne

Taha Toros Arşivi, Dosya No: 71-Ahmet Cevdet Paşaİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033

Güney Marmara Şartlarında Organik Koyun Yetiştiriciliği ve Kuzu Besisi Üzerine Bir Araştırma

Bu araştırma, Marmara Hayvancılık Araştırma Enstitüsü’nde organik ve konvansiyonel sistemlerde yetiştirilen Kıvırcık koyunların döl verimi; kuzuların büyüme özellikleri ve besi performansları ile bazı kesim, karkas ve et özelliklerini karşılaştırmak amacıyla düzenlenmiştir. Organik yetiştiricilik Kıvırcık koyunların döl verimini ve kuzuların büyüme özelliklerini olumlu yönde etkilemiş; organik koyunlar konvansiyonellere göre daha yüksek doğum oranına sahip olmuşlardır. Konvansiyonel beside kuzular, konvansiyonel arpaya dayalı karma yemle ad-libitum düzeyde beslenmiş, ayrıca kuzu başına günde 100 g yonca kuru otu verilmiştir. Organik besi grupları merada otlatılmış, barınak içerisinde organik arpaya dayalı karma yemle beslenmişlerdir. Meranın yetersiz olduğu dönemde ise organik arpa hasılı verilmiştir. Denemede ortalama canlı ağırlığı 35 kg’a ulaşan gruplardaki tüm kuzular kesime gönderilmiştir. Organik kuzular, konvansiyonellere göre hedeflenen besi sonu canlı ağırlığa daha kısa sürede ulaşmışlardır. Organik kuzularda besi süresince günlük ortalama canlı ağırlık artışı konvansiyonellere göre daha yüksek olmuştur (P<0.05). Besleme sistemi sırt yağı kalınlığı üzerine etkili olmuş; organik kuzularda sırt yağı kalınlığı konvansiyonelden daha düşük bulunmuştur (P<0.05). Öte yandan, organik üretim özellikle erkek hayvan etlerindeki kolesterol düzeyini düşürmüştür

A quantitative study of the feasibility of oxygen laser induced fluorescence for engineering gas temperature measurements

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.Includes bibliographical references.by Ismail Ceyhan.Ph.D

ANALYZING THE FINANCIAL PERFORMANCE OF AUTOMOTIVE COMPANIES BEFORE AND AFTER INDUSTRY 4.0: AN APPLICATION IN THE BIST SUSTAINABILITY INDEX

Today, the "Industry 4.0 revolution", which offers opportunities such as a substantial competitive advantage, increase in production capacity, and cost reduction, is preparing to move institutions to a rapidly changing information age. Therefore, the importance of keeping up with innovations and providing sustainable performance is increasing for businesses in this age. On the other hand, it draws the attention of researchers to whether there is a difference between the financial performances of companies before-after industry 4.0. The study compares the financial performances of automotive companies that have adopted Industry 4.0 methods in the BIST Sustainability Index, before and after Industry 4.0. For this purpose, the companies' financial performances were analyzed and compared between 2013-2015 and 2016-2018 with the Gray Relational Analysis method, one of the multi-criteria decision-making techniques. The entropy which is an objective method, was preferred for weighting the criteria. Ten financial ratios were used as criteria in the performance evaluation. As a result, almost all companies increase their financial performance, but a decrease occurs only in one company's financial performance with the transition to Industry 4.0. So it can be stated that the increase in the share of R&D expenditures and Industry 4.0 investments will positively affect the financial performance of companies

The Effect of Covid-19 on Business Financial Performance: A Research on Forest Industrial Enterprises Traded on Borsa Istanbul

The COVID-19 pandemic has had a significant negative impact on the Turkish economy and the global economy. Turkey’s economy contracted by 10.2% in 2020, recording the most significant decline since the 1950s. The effects of the epidemic could also be observed on companies which had to close or lay off staff. This study aims to examine the financial impact of the COVID-19 pandemic on the forest industry by revealing the financial performance of publicly traded forest industry companies in Turkey before and after COVID-19. For this purpose, the financial performances of 11 companies operating in the forest products industry in Turkey and registered in the BIST XKGT index in the 2017-2022 period were examined. In this context, we used the integrated Entropy-CP method. In the initial phase of analysis, criteria weights were determined using the entropy method to assess the significance levels of the financial ratios. Subsequently, financial success rankings were generated by employing the CP method. In general, it was observed that the weight values of the criteria were close to each other. As a result, it was determined that the companies showed the best average financial success in 2022 and the lowest average financial performance in 2017. Following the pandemic’s occurrence, some companies’ performance improved, while others experienced a partial decline. Therefore, no general improvement or worsening trend could be detected during the years of the COVID-19 pandemic. In the context of this study, it was concluded that the pandemic did not affect the financial performance of companies operating in the forest products sector

Distribution of Spoligotyping Defined Genotypic Lineages among Drug-Resistant Mycobacterium tuberculosis Complex Clinical Isolates in Ankara, Turkey

Background: Investigation of genetic heterogeneity and spoligotype-defined lineages of drug-resistant Mycobacterium tuberculosis clinical isolates collected during a three-year period in two university hospitals and National Tuberculosis Reference and Research Laboratory in Ankara, Turkey. Methods and Findings: A total of 95 drug-resistant M. tuberculosis isolates collected from three different centers were included in this study. Susceptibility testing of the isolates to four major antituberculous drugs was performed using proportion method on Löwenstein–Jensen medium and BACTEC 460-TB system. All clinical isolates were typed by using spoligotyping and IS6110-restriction fragment length polymorphism (RFLP) methods. Seventy-three of the 95 (76.8%) drug resistant M. tuberculosis isolates were isoniazid-resistant, 45 (47.4%) were rifampicin-resistant, 32 (33.7%) were streptomycinresistant and 31 (32.6%) were ethambutol-resistant. The proportion of multidrug-resistant isolates (MDR) was 42.1%. By using spoligotyping, 35 distinct patterns were observed; 75 clinical isolates were grouped in 15 clusters (clustering rate of 79%) and 20 isolates displayed unique patterns. Five of these 20 unique patterns corresponded to orphan patterns in th

Elective cancer surgery in COVID-19-free surgical pathways during the SARS-CoV-2 pandemic: An international, multicenter, comparative cohort study

PURPOSE As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19–free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19–free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19–free surgical pathways. Patients who underwent surgery within COVID-19–free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19–free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score–matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19–free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION Within available resources, dedicated COVID-19–free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks

Elective Cancer Surgery in COVID-19-Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study.

PURPOSE: As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19-free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS: This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19-free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS: Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19-free surgical pathways. Patients who underwent surgery within COVID-19-free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19-free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score-matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19-free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION: Within available resources, dedicated COVID-19-free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks