Interview with Marjorie Harkins Buchanan Kiewit

In this interview with Julia Stringfellow, Marjorie Harkins Buchanan Kiewit, LU class of 1943, discusses her time as a student as well as her time on the Board of Trustees.https://lux.lawrence.edu/oralhistories/1036/thumbnail.jp

Ayvalık zeytin fidanlarında su stresine bağlı olarak bitki su stres indeksi (CWSI)'nin değişimi ve CWSI ile stoma iletkenliği arasındaki ilişkinin belirlenmesi

Bu çalışma, 2012 yılında Gıda Tarım ve Hayvancılık Bakanlığı, Bornova Zeytincilik Araştırma İstasyonunda, TAGEM/BBAD/12/AO8/P06/1 nolu projenin alt projesi olarak saksılarda yetiştirilen 3 yaşlı Ayvalık çeşidi zeytin fidanlarında yapılmıştır. Oldukça yaygın olarak yetiştirilen çeşitlerden biri olan Ayvalık çeşidinin su stresine gösterdiği tepki, bitki su stres indeksinin (CWSI) zamansal değişimleri gözlenerek irdelenmiş ve bitki su stres göstergesinin stoma iletkenliği (gs) ile ilişkisi ortaya koyulmuştur. Çalışmada, konular, bitki su tüketiminin %100 (I100), %66 (I66), %33 (I33)'ü kadar su uygulanması şeklinde oluşturulmuştur. Bitkinin fizyolojik özelliklerini incelemek amacıyla, yaprak sıcaklığı ve hava sıcaklığı farkı (Tl-Ta) ve stoma iletkenliği (gs), saptanmıştır. Bitkinin morfolojik özelliklerini incelemek amacıyla ise gövde çapı, bitki boyu, sürgün çapı ve sürgün uzunluğu değerleri belirlenmiştir. Araştırmada sulama suyu ihtiyacı 40.7 ile 123.3 lt/saksı arasında, bitki su tüketimi ise 48,2 ile 129 lt/saksı arasında değişiklik göstermiştir. Çalışmada elde edilen bulgulara göre morfolojik parametreler, Tl-Ta ve gs değerlerinde konular arasındaki fark istatiksel açıdan önemli bulunmuştur. Araştırmada, bitki sıcaklığı, hava sıcaklığı ve buhar basıncı açığı ölçümlerine göre elde edilen alt ve üst baz eşitliklerine göre bitki su stres indeksi değerleri hesaplanmıştır. Dönem boyunca hesaplanan ortalama CWSI değerleri I100 konusu için 0.09, I66 konusu için 0.30 ve I33 konusu için 0.48 olarak elde edilmiştir. Bitki su stres indeksi (CWSI) ve stoma iletkenliği arasında önemli ilişki bulunmuş konulara göre I100 konusu için R2=0.577, I66 konusu içinR2=0.59 ve I33 konusu için R2=0.41 olarak elde edilmiştir. Zeytinin su stresine karşı tepkisinin belirlenmesinde, (gs) ve taç sıcaklığı ölçümleri ve buna bağlı olarak bitki su stresi indeksi (CWSI) n belirlenmesinden yararlanılabilir Ayvalık çeşidi ,kuraklığa toleranslı bir çeşit olarak, kurak yada su kaynağının yetersiz olduğu alanlarda yetiştiriciliği önerilebilir

CFD and Experimental Analysis on Thermal Performance of Exhaust Systems of a Spark Ignition Engine

Catalysts of a gasoline engine become active when the exhaust temperature exceeds 200 degrees C. Cold start HCs are extremely high until catalysts reach the light-off temperature. Determination of optimum place necessary time of the catalyst to reach this temperature is of vital importance. Interaction between exhaust gas and inner wall, along with the exhaust pipe needs to be well-understood. The interaction can be computed by numerical solutions based on fluid dynamics and heat transfer equations depending on time and location. In the study, three-dimensional transient CFD analysis has been performed for the whole exhaust pipe. The results of CFD analysis was in very good agreement with those of experimental data. Also, an optimal catalyst location was determined by the CFD analysis performed in transient regime. Heat transfer phenomena were also investigated analytically using different Nusselt number correlations given in the literature. Analytic results were compared with those of the experimental data. Each correlation gave reasonable results with different range of Reynolds number

CFD AND EXPERIMENTAL ANALYSIS ON THERMAL PERFORMANCE OF EXHAUST SYSTEM OF A SPARK IGNITION ENGINE

Catalysts of a gasoline engine become active when the exhaust temperature exceeds 200 degrees C. Cold start HCs are extremely high until catalysts reach the light-off temperature. Determination of optimum place necessary time of the catalyst to reach this temperature is of vital importance. Interaction between exhaust gas and inner wall, along with the exhaust pipe needs to be well-understood. The interaction can be computed by numerical solutions based on fluid dynamics and heat transfer equations depending on time and location. In the study, three-dimensional transient CFD analysis has been performed for the whole exhaust pipe. The results of CFD analysis was in very good agreement with those of experimental data. Also, an optimal catalyst location was determined by the CFD analysis performed in transient regime. Heat transfer phenomena were also investigated analytically using different Nusselt number correlations given in the literature. Analytic results were compared with those of the experimental data. Each correlation gave reasonable results with different range of Reynolds number

CFD AND EXPERIMENTAL ANALYSIS ON THERMAL PERFORMANCE OF EXHAUST SYSTEM OF A SPARK IGNITION ENGINE

Catalysts of a gasoline engine become active when the exhaust temperature exceeds 200 degrees C. Cold start HCs are extremely high until catalysts reach the light-off temperature. Determination of optimum place necessary time of the catalyst to reach this temperature is of vital importance. Interaction between exhaust gas and inner wall, along with the exhaust pipe needs to be well-understood. The interaction can be computed by numerical solutions based on fluid dynamics and heat transfer equations depending on time and location. In the study, three-dimensional transient CFD analysis has been performed for the whole exhaust pipe. The results of CFD analysis was in very good agreement with those of experimental data. Also, an optimal catalyst location was determined by the CFD analysis performed in transient regime. Heat transfer phenomena were also investigated analytically using different Nusselt number correlations given in the literature. Analytic results were compared with those of the experimental data. Each correlation gave reasonable results with different range of Reynolds number

Balneoterapinin fibromiyalji hastalarında ağrı ve yaşam kalitesine etkisi

Aim: The aim of this study was to investigate effect of balneotherapy (BT) on pain and quality of life in patients with fibromyalgia (FMS). Material and Methods: The study included 98 women without known metabolic or psychiatric disorder and history of new medication within prior month who were diagnosed as primary fibromyalgia according to 2010 American College of Rheumatology (ACR) criteria and accepted to participate to the study. The sociodemographic characteristics were recorded for all patients. All patients received 21 consecutive sessions of balneotherapy (20 minutes per day). The patients were assessed by Fibromyalgia Impact Questionnaire (FIQ) and Visual Analog Scale (VAS) before and after therapy. Results: The mean age of the all patients was 53.04 ± 10.3 years, the mean body mass index was 29.06 ± 5.9 kg/m2, and the mean disease duration was 54.91 ± 59.5 months. In patients with FMS, there were significant differences between VAS and FIQ scores assessed before and after BT (p=0.01). Also, the extent of decrease in FIQ score was greater in non-smokers than smoker FM patients (p<0.05). Conclusion: In patients with FM, there was a significant difference in VAS scores following BT. Moreover, there was also a significant difference in FIQ scores. However, the improvement in quality of life after BT was greater in non-smoker FM patients when compared to smoker FM patient

INVESTIGATION OF THE VISCOUS HEATING EFFECT AT SINGLE-PHASE LAMINER WATER FLOW IN MICROTUBES

In the study, experimental and numerical study have been conducted with microtubes having diameters range between 50 and 150 mu m to investigate viscous heating effects on the single-phase water flow. In the experiments temperature rises due to viscous heating have been measured under adiabatic conditions. Numeric analysis of flow through the adiabatic microtubes was performed by taking into account viscous heating effects using by computational fluid dynamic (CFD) code ANSYS CFX 12.0. CFD results were compared both experimental and analytical model results

EXPERIMENTAL VALIDATION OF LMTD METHOD FOR MICROSCALE HEAT TRANSFER

The single phase fluid flow and heat transfer characteristic has been investigated experimentally. Experiments were conducted to cover transition zone for the Reynolds numbers ranging from 100 to 4800 by fused silica and stainless steel microtubes having diameters of 103-180 mu m. The applicability of the Logarithmic Mean Temperature Difference (LMTD) method was revealed and an experimental method was developed to calculate the heat transfer coefficient. Moreover the scaling effects in micro scale such as axial conduction, viscous heating and entrance effects were discussed. The heat transfer coefficients were compared with data obtained by the correlations available in the literature in the study. The Nusselt numbers of microtube flows do not accord with the conventional results when the Reynolds number was lower than 1000. After that, the Nusselt number approaches the conventional theory prediction. On the aspect of fluid characteristics, the friction factor was well predicted with conventional theory and the conventional friction prediction was valid for water flow through microtube with a relative surface roughness less than about 4 %