A case study of the composing processes of three Bilkent first-year students in a test-taking situation

Ankara : Institute of Humanities and Letters of Bilkent University, 1994.Thesis (Master's) -- -Bilkent University, 1994.Includes bibliographical references leaves 49-51This descriptive case study was an empirical investigation of the composing processes of students in a test-taking situation. The subjects were 3 volunteer EFL (English as a foreign language) first-year students at Bilkent University, which is an English-medium university in Turkey. The data were collected from direct observations while the subjects were writing their midterm examinations and from interviews with the subjects that took place immediately after the examinations were completed. The results showed that the subjects' composing processes in a test-taking situation were similar to the composing processes of student writers in non test-taking situations (Pianko, 1977; Sommers, 1980; Zamel, 1983). The following are some of the important similarities. During prewriting the subjects generated some general ideas to develop in their writing. However, they did not feel obliged to use these general plans. Planning was also done during pausing and rescanning. Similar to other student writers (Sommers, 1980), their primary focus of revising was surface-level concerns such as grammar, spelling, and lexical mistakes rather than revisions of content of their writing. All subjects stated that they tried to follow their teachers' instructions about essay writing. Although the subjects knew that they would be graded, they did not seem to commit themselves to the writing tasks by making use of the whole examination time. This may closely be related to test-anxiety, in which avoidance and escape are common behaviors (Deffenbacher, 1986). The results supported the findings of previous research on school-sponsored writing. The subjects did not commit themselves to the topics. They considered the writing unimportant, a task they had to fulfill for the sake of a grade. They stated that they did not have a real message to give about their assigned exam topics and that the teachers were not interested in the content of their essays. The subjects focused on form rather than content. Based on these results, it is suggested that writing instructors should spend more time on prewriting to generate content and focus on content rather than surface-level concerns while revising.Akada, Tijen KargıoğluM.S

UnrealEgo: A New Dataset for Robust Egocentric 3D Human Motion Capture

We present UnrealEgo, i.e., a new large-scale naturalistic dataset for egocentric 3D human pose estimation. UnrealEgo is based on an advanced concept of eyeglasses equipped with two fisheye cameras that can be used in unconstrained environments. We design their virtual prototype and attach them to 3D human models for stereo view capture. We next generate a large corpus of human motions. As a consequence, UnrealEgo is the first dataset to provide in-the-wild stereo images with the largest variety of motions among existing egocentric datasets. Furthermore, we propose a new benchmark method with a simple but effective idea of devising a 2D keypoint estimation module for stereo inputs to improve 3D human pose estimation. The extensive experiments show that our approach outperforms the previous state-of-the-art methods qualitatively and quantitatively. UnrealEgo and our source codes are available on our project web page.Comment: 21 pages, 10 figures, 10 tables; project page: https://4dqv.mpi-inf.mpg.de/UnrealEgo

Cells Attachment Property of PVA Hydrogel Nanofibers Incorporating Hyaluronic Acid for Tissue Engineering

In this work, we report the fabrication and cell affinity studies of the poly(vinyl alcohol) (PVA)/hyaluronic acid (HA) cross-linked nanofibers via electrospinning and post cross-linking. FT-IR and TGA analysis demonstrate that HA is not influenced by acid environment such as HCl vapor during cross-linking, and well incorporated into PVA nanofibers. Swelling behavior and cell adhesion of the PVA/HA hydrogel nanofibers are investigated and compared with pure PVA hydrogel nanofibers. It is expected that the nanofibrous PVA/HA hydrogel fibers could be a promising scaffold for cell culture and tissue engineering applications.ArticleJournal of Biomaterials and Nanobiotechnology. 2:353-360 (2011)journal articl

Self-Assembled Core-Shell Poly(ethylene glycol)-POSS Nanocarriers for Drug Delivery

In this work, novel nanostructured core-shell poly (ethylene glycol) (PEG)-polyhedral oligosilsesquioxane (POSS) nanoparticles were used to encapsulate insulin as new drug delivery carriers. The morphologies, particle size and ? potential of th e pure nanostructured core-shell PEG-POSS and th e corresponding insulin-load ed PEG-POSS nanopar-ticles were investigated by transmission electron microscopy (TEM) and laser diffraction particle sizer. TEM analysis demonstrated that pure and insulin-loaded self-assembled PEG-POSS nanoparticles were of spherical shape with core-shell nanostructure, and were well-dispersed and uniform in size distribution. Insulin release test showed that in-sulin was well-protected in side PEG-POSS nanoparticles at gastric pH for 2 hrs, and was released at intestinal pH (pH 6 - 7) where the absorption and activation of the drug are necessary. We therefore believe that such nanostructured PEG-POSS nanoparticles could be useful as a potential carrier for insulin drug delivery systems.ArticleJournal of Biomaterials and Nanobiotechnology. 2:201-206 (2011)journal articl

プラズマによるグラフェン格子表面修飾の研究

学位の種別: 課程博士審査委員会委員 : （主査）東京大学教授 齊木 幸一朗, 東京大学教授 吉川 一朗, 東京大学准教授 佐々木 岳彦, 東京大学准教授 井 通暁, 東京大学准教授 原田 慈久University of Tokyo(東京大学