Epidermal growth factor receptor mutation and pattern of brain metastasis in patients with non-small cell lung cancer.

Background/aims: We investigated the time taken for patients with metastatic non-small cell lung cancer (NSCLC) to develop brain metastases (BM), as well as their subsequent overall median survival following diagnosis, considering the epidermal growth factor receptor () mutational status.

Methods: We retrospectively investigated the medical records of 259 patients diagnosed with advanced NSCLC from January 2010 to August 2013, who were tested for mutations. The time from the diagnosis of advanced NSCLC to the development of BM and the overall median survival after BM development (BM-OS) were evaluated and compared by mutational status.

Effects of Complex Structured Anodic Oxide Dielectric Layer Grown in Pore Matrix for Aluminum Capacitor.

Anodization of aluminum is generally divided up into two types of anodic aluminum oxide structures depending on electrolyte type. In this study, an anodization process was carried out in two steps to obtain high dielectric strength and break down voltage. In the first step, evaporated high purity Al on Si wafer was anodized in oxalic acidic aqueous solution at various times at a constant temperature of 5 degrees C.

Manufacture and Evaluation of Light Emitting Diode Package Substrate Using Flexible Printed Circuit Board.

Unlike other light sources such as fluorescent lamps and incandescent bulbs, light-emitting diodes (LED) convert 70-80% of energy into heat. If the heat produced an LED chip is not effectively released, its luminous efficiency and lifespan are reduced. Therefore, as a method effectively release heat, an LED PKG substrate containing a heat-releasing material with excellent thermal conductance was fabricated, and its thermal resistance and luminous efficiency were analyzed.

The Properties of Cu Thin Films on Ru Depending on the ALD Temperature.

The copper thin films were deposited by Atomic layer deposition (ALD) on a ruthenium depending on the substrate temperatures. The substrate deposited Ru and TaN on SiO2 by plasma enhanced ALD (PEALD) before Cu deposition for an adhesion layer between Si and Cu. The copper thin films were deposited 200 cycles.

Corrosion resistance of ultrasonic electrodeposited Ni-Co-Fe ternary alloy films according to current density.

Ni-Co-Fe ternary alloy films were deposited on Copper clad laminate (CCL) by ultrasonic electroplating at different current densities from a sulfate bath. The corrosion properties of the ultrasonically-electrodeposited Ni-Co-Fe films were investigated by electrochemical impedance spectroscopy (EIS). We found that Ni, Co, and Fe component ratios changed according to the current density.

Effect of thiourea on electrochemical nucleation and electrochemical impedance spectroscopy of electrodeposited tin on a copper substrate in a sulfate bath.

The effect of thiourea on the electrochemical nucleation of tin on a copper substrate from a sulfate bath was studied using voltammetry, chronoamperometry, electrochemical impedance spectroscopy, and scanning electron microscopy. Without thiourea, electrodeposition of tin showed very poor surface coverage. However, re-nucleation and growth of tin occurred after the addition of thiourea.

The Unusual Suspect: Anemia-induced Systolic Anterior Motion of the Mitral Valve and Intraventricular Dynamic Obstruction in a Hyperdynamic Heart as Unexpected Causes of Exertional Dyspnea after Cardiac Surgery.

Dynamic left ventricular (LV) outflow tract obstruction is a characteristic feature of hypertrophic cardiomyopathy; however, it can also occur in association with hyperdynamic LV contraction and/or changes in the cardiac loading condition, even in a structurally normal or near-normal heart. Here, we report a case of anemia-induced systolic anterior motion of the mitral valve and the resultant intraventricular obstruction in a patient who underwent coronary artery bypass grafting and suffered from anemia associated with recurrent gastrointestinal bleeding.

Evaluation of stress in korean patients with diabetes mellitus using the problem areas in diabetes-Korea questionnaire.

Background: It is known that diabetes and stress are directly or indirectly related, and that it is important to evaluate stress in patients with diabetes. The relationship between Korean diabetics and diabetes-related stress has never been reported. The objective of this study was to develop a stress questionnaire suitable for use with Korean diabetics and to evaluate its utility.