Dünyamızın bugünkü şairleri:Nazım Hikmet - Aragon - Eluard - Pablo Neruda - Garcia Lorca - Langston Hughes

Taha Toros Arşivi, Dosya Adı: Nazım Hikmetİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033

Dermatologcal Complaints of the Elderly Attending a Dermatology Outpatient Clinic in Turkey: A Prospective Study over a One-year period

The geriatric population is continuously growing, which leads to more aged patients being admitted to dermatology clinics. The aim of this study is to determine the dermatological complaints of the elderly attending a dermatology outpatient clinic.All of the patients aged 65 years and older admitted to our dermatology outpatient clinic over a 1-year period were included. Patients were divided into 2 groups according to their ages as group I (65-74 years) and group II (≥75 years). The patients were asked about their dermatologic complaints.A total of 240 geriatric patients attended to the dermatology outpatient clinic over a 1-year period. Overall, the five most frequent dermatologic complaints of the patients were eczematous dermatitis (21.7%), pruritus (19.6%), fungal infections (16.7%), precancerous and malignant lesions (9.6%), and bacterial infections (7.1%). The most frequent types of eczematous dermatitis were asteatotic eczema (26.9%), neurodermatitis (26.9%), and stasis dermatitis (17.3%). Among fungal infections, the most frequent was tinea pedis (62.5%), followed by onychomycosis (32.5%) and tinea versicolor (5.0%). The most common precancerous lesion was actinic keratosis (78.3%). Bacterial infections encountered were pyoderma (58.8%), cellulitis (23.5%), and erythrasma (17.6%).Most of the skin problems in the elderly are preventable or treatable, so proper skin care and treatment of skin diseases should be emphasized in general health care for the elderly. </p

3D printed Artificial Cornea for Corneal Stromal Transplantation

The aim of this study is to understand the optical, biocompatible, and mechanical properties of chitosan (CS) and polyvinyl-alcohol (PVA) based corneal stroma constructs using 3D printing process. Corneal stroma is tested for biocompatibility with human adipose tissue-derived mesenchymal stem cells (hASCs). Physico-chemical and chemical characterization of the construct was performed using scanning electron microscopy (SEM), fourier transforms infrared spectroscopy (FTIR). Optical transmittance was analyzed using UV-Spectrophotometer. Results showed fabricated constructs have required shape and size. SEM images showed construct has thickness of 400 µm. The FTIR spectra demonstrated the presence of various predicted peaks. The swelling and degradation studies of 13%(wt)PVA and 13%(wt)PVA/(1, 3, 5)%(wt)CS showed to have high swelling ratios of 7 days and degradation times of 30 days, respectively. The light transmittance values of the fabricated cornea constructs decreased with CS addition slightly. Tensile strength values decreased with increasing CS ratio, but we found to support intraocular pressure (IOP) which ranges from 12 to 22 mm-Hg. Preliminary biostability studies showed that composite constructs were compatible with hASCs even after 30 days’ of degradation, showing potential for these cells to be differentiated to stroma layer in future. This study has implications for the rapid and custom fabrication of various cornea constructs for clinical applications

X-RHex: A Highly Mobile Hexapedal Robot for Sensorimotor Tasks

We report on the design and development of X-RHex, a hexapedal robot with a single actuator per leg, intended for real-world mobile applications. X-RHex is an updated version of the RHex platform, designed to offer substantial improvements in power, run-time, payload size, durability, and terrain negotiation, with a smaller physical volume and a comparable footprint and weight. Furthermore, X-RHex is designed to be easier to build and maintain by using a variety of commercial off-the-shelf (COTS) components for a majority of its internals. This document describes the X-RHex architecture and design, with a particular focus on the new ability of this robot to carry modular payloads as a laboratory on legs. X-RHex supports a variety of sensor suites on a small, mobile robotic platform intended for broad, general use in research, defense, and search and rescue applications. Comparisons with previous RHex platforms are presented throughout, with preliminary tests indicating that the locomotive capabilities of X-RHex can meet or exceed the previous platforms. With the additional payload capabilities of X-RHex, we claim it to be the first robot of its size to carry a fully programmable GPU for fast, parallel sensor processing

Ion source and LEBT of KAHVELab proton beamline

The KAHVE Laboratory, at Bo\u{g}azi\c{c}i University, Istanbul, Turkey is home to an educational proton linac project. The proton beam will originate from a 20 keV H+ source and will be delivered to a two module Radio Frequency Quadrupole (RFQ) operating at 800 MHz via a low energy beam transport (LEBT) line. Currently, the design phase being over, commissioning and stability tests are ongoing for the proton beamline which is already produced and installed except the RFQ which is being manufactured. This work summarizes the design, production and test phases of the ion source and LEBT line components