Evaluation of conservation problems of Değirmendağı District in İzmir

Thesis (Master)--Izmir Institute of Technology, Architectural Restoration, Izmir, 2008Includes bibliographical references (leaves: 123-125)Text in English; Abstract: Turkish and Englishxiv, 220 leavesIntegral part of the cultural heritage, historical settlements should be documented with their local characteristics. The aim of this study is to document, analyze, and evaluate social, architectural and enviromental characteristics of the historic Değirmendağı District of İzmir, Turkey.Değirmendağı is located near the city center, providing a silhouette to the city.This ninteenth-century residential area was settled by refugees immigrating after the 1877-1878 Russo-Turkish War. Later, Değirmendağı District began to lose its integrity owing to lack of care and interest, and demographic changes in the neighborhood.Documentation methods used are sketches, photography. Documentation architectural and social questionnaires. Inventory cards were prepared to collect architectural characteristics of each building. Data gathered at the site was analyzed and evaluated to develop conservational approach, including historical review of the ancient era. The variables of the study are composed of two groups. The first is architectural characteristics: disposition of buildings, land use, number of storeys, plan and façade typologies, exterior architectural elements, period of buildings, construction technique, structurnal condition, types of alterations, and visual values. The second group is comprised of socio . economic characteristics: ownership and rent groups, origin, density, education, profession, income and sanitary conditions.This area should be integrated with the city and its citizens. This study documents the present potentials and values of the area and forms a basis to prepare conservation approaches. An equitable and livable heritage conservation perspective is imperative

Extensional rheology and stability behavior of alumina suspensions in the presence of AMPS-modified polycarboxylate ether-based copolymers

A series of polycarboxylate ether-based copolymers that include acrylic acid, 2-acrylamido-2-methylpropane sulfonic acid, and polyethylene glycol-1000 was synthesized, and the performance of these copolymers as rheology modifiers in aqueous alumina suspensions was characterized. We discussed the effect of monomer feed ratio and molecular weight on dispersing ability of these copolymers and on extensional behavior of alumina suspensions. Results of zeta potential analysis determined that using the copolymers even at 0.5 wt.% results in all-negative zeta potentials for the entire pH range (2-12). These copolymers immensely affect the extensional rheological behavior of alumina suspensions-while 20 vol.% pure alumina suspension showed severe strain hardening behavior, suspensions with 1 wt.% copolymers and 35 vol.% alumina particles displayed no strain hardening. In this series, the copolymer with lowest molecular weight decreased the extensional viscosity of suspensions at the rupture of thread with three orders of magnitude as well

Leisure Time Use, Meaning of Life, and Psychological Distress: Comparing Canadian and Korean Older Adults

Older adults’ day-to-day leisure time activities both reflect and stimulate physical, cognitive, and social capacities that contribute to their quality of life. To better understand how leisure activity choices and possible impacts vary across two cultures, this questionnaire-based study compared leisure time use, perceived meaning of life, and psychological distress for 617 older adults in Canada (n=298) and the Republic of Korea (Korea) (n=319). Compared to Koreans, Canadian respondents spent more time overall in leisure activities and devoted a higher percentage of their total leisure time to active, rather than passive, activities. They spent significantly more of their time on cognitively active activities, while Koreans preferred socially and physically active ones and scored significantly higher on both meaning of life and psychological distress. Both groups spent more of their time watching television than on any other single reported activity. Age group, retirement status, health, education, and income varied across the two countries and were significantly associated with aspects of leisure time use for each group. The results identify areas for improvement if Canadian and Korean older adults’ leisure time use is to effectively support their aging well

Poly(carboxylate ether)-based superplasticizer achieves workability retention in calcium aluminate cement

Calcium aluminate cement (CAC) suffers from loss of workability in less than an hour (~15 minutes) after first touch of water. Current superplasticizers that are utilized to modify the viscosity of cement admixtures are designed to target ordinary Portland cement (OPC). The high affinity between these superplasticizers and cement particles were found to be detrimental in CAC systems. Utilization of a monomer that, instead, facilitates gradual adsorption of a superplasticizer provides workability retention. For the first time in literature, we report a superplasticizer that caters to the properties of CAC such as high rate of surface development and surface charge. While neat CAC was almost unworkable after 1 hour, with the addition of only 0.4% of the optimized superplasticizer, 90% fluidity retention was achieved

A PCE-based rheology modifier allows machining of solid cast green bodies of alumina

The performance of a poly(carboxylate ether) (PCE)-based superplasticizer to enable the machining of green bodies that are solid cast from suspensions of alumina was investigated. An alumina loading of 35 vol% in the presence of 1.25 wt% superplasticizer was established to be suitable for lathing and removal of significant amount of material through drilling. A reduction of 77% in the diameter of green bodies that corresponds to a 59% reduction in volume was achieved. The lathed green bodies exhibited smooth terraces without visible cracks. All of the green bodies were sintered without a polymer burnout step

Synthesis and characterization of mixed ligand chiral nanoclusters

Chiral mixed ligand silver nanoclusters were synthesized in the presence of a chiral and an achiral ligand. The ratio of the ligands was changed to track the formation of these clusters. While the chiral ligand lead to nanoparticles, Presence of the achiral ligand induced the formation of nanoclusters with chiral properties

Silicone-based composites as surgical breast models for oncoplasty training

Surgeons-in-training necessitate practice to improve their skill sets and the shift towards simulation-based trainings enables trainees to learn at their own pace and experience custom-based cases rather than responding to the immediate needs of the patients. Oncoplasty for breast cancer encompasses tumor removal and subsequent breast reconstruction; and there are several oncoplastic techniques to master for proper treatment of the patients. For training purposes, closest media to reality, fresh cadavers, are hard to obtain due to their price and/or unavailability. There is a need for a sustainable, reliable, and affordable platform to diffuse simulation-based trainings to medical curricula and provide trainings even in resource-limited settings. Silicone-based composite models can be designed and manufactured to fulfil the necessities of breast surgery such as precise incision, epidermal undermining, suturing, and resisting suture tension after excision of a considerable mass. We have shown the performance of such a stand-alone breast model for two oncoplastic techniques, “Batwing Mammoplasty” and “Modified Inferior Flap Rezai”. This model can be used in settings where it is difficult and/or expensive to find fresh cadavers. This cost-effective and practical solution also eliminates the need for chemical/cold storage and risk of infections/molding, thus making it a preferable tool for teaching hospitals and also for individual practice. In addition, the model is suitable to be used in self-diagnosis trainings, as well as a communication platform between surgeons and patients

Evaluation of conservation problems of Değirmendağı District in İzmir

Thesis (Master)--Izmir Institute of Technology, Architectural Restoration, Izmir, 2008Includes bibliographical references (leaves: 123-125)Text in English; Abstract: Turkish and Englishxiv, 220 leavesIntegral part of the cultural heritage, historical settlements should be documented with their local characteristics. The aim of this study is to document, analyze, and evaluate social, architectural and enviromental characteristics of the historic Değirmendağı District of İzmir, Turkey.Değirmendağı is located near the city center, providing a silhouette to the city.This ninteenth-century residential area was settled by refugees immigrating after the 1877-1878 Russo-Turkish War. Later, Değirmendağı District began to lose its integrity owing to lack of care and interest, and demographic changes in the neighborhood.Documentation methods used are sketches, photography. Documentation architectural and social questionnaires. Inventory cards were prepared to collect architectural characteristics of each building. Data gathered at the site was analyzed and evaluated to develop conservational approach, including historical review of the ancient era. The variables of the study are composed of two groups. The first is architectural characteristics: disposition of buildings, land use, number of storeys, plan and façade typologies, exterior architectural elements, period of buildings, construction technique, structurnal condition, types of alterations, and visual values. The second group is comprised of socio . economic characteristics: ownership and rent groups, origin, density, education, profession, income and sanitary conditions.This area should be integrated with the city and its citizens. This study documents the present potentials and values of the area and forms a basis to prepare conservation approaches. An equitable and livable heritage conservation perspective is imperative