Glass crystallization making red phosphor for high-power warm white lighting

Rapid development of solid-state lighting technology requires new materials with highly efficient and stable luminescence, and especially relies on blue light p...     

Neutrophils Mediate Pulmonary Artery Thrombosis In Situ

Pulmonary embolism is a life-threatening condition, which can result in respiratory insufficiency and death. Blood clots occluding branches of the pulmonary artery (PA) are traditionally considered to originate from thrombi in deep veins (usually in legs). However, growing evidence suggests that occlusion of the vessels in the lungs can develop without preceding deep vein thrombosis (DVT). In this work, we used an inferior vena cava (IVC) complete ligation model of DVT in Wistar rats to explore the possibility and mechanisms of PA thrombosis under the conditions where all routes of thrombotic mass migration from peripheral veins are blocked. We demonstrate that rats both with normal and reduced neutrophil counts developed thrombi in the IVC, although, neutropenia caused a substantial decrease in thrombus size and a shift from fresh fibrin toward mature fibrin and connective tissue inside the thrombus. Massive fibrin deposition was found in the PA branches in the majority of DVT rats with normal neutrophil counts, but in none of the neutropenic animals. Neutrophil ablation also abolished macroscopic signs of lung damage. Altogether, the results demonstrate that thrombi in the lung vasculature can form in situ by mechanisms that require local neutrophil recruitment taking place in the DVT setting.     

NiZnCu Ferrite Thick Film with Nano Scale Crystallites Formed by the Aerosol Deposition Method

This paper describes the magnetic properties of NiZnCu ferrite film deposited at room temperature by an aerosol deposition method (ADM). The thickness of the film was 6 μm and the deposition rate was estimated as 2 μm/min. The microstructure of as-deposited at room temperature films consists of randomly oriented nanocrystallites with a size of 20 nm. As-deposited and annealed films exhibited the following magnetic properties: intensity of magnetization M _s= 0.147 T (117 emu/cm³), coercivity H _c= 40.58 kA/m (510 Oe); and M _s= 0.3 T (250 emu/cm³), H _c= 14.95 kA/m (188 Oe), respectively.     

Digitizing a Dictionary of Medieval Irish: the eDIL Project

The Centre for Irish and Celtic Studies at the University ofUlster is currently producing a digital dictionary of medievalIrish (eDIL) based on the standard Dictionary of the Irish Languagepublished by the Royal Irish Academy, Dublin. This paper addressessome of the problems encountered in the digitization process,including data capture, processing non-standard characters,modifications to the TEI guidelines, automatic generation oftags, and the establishment of a lexical view while preservingthe original format of the paper dictionary.     

开关电源动态负载的探讨

前言 同步降压型开关电源具有输出电流大、效率高等优点,适合电池供电、注重效率的笔记本电脑等产品。一般笔记本电脑各部分组件,如CPU、芯片组、绘图芯片、内存、硬盘、光驱等,对电源电压/电流的要求不同。因此笔记本电脑内需要多路降压型DC/DC转换器产生不同的输出电压/电流,这些DC/DC转换器大多采用脉冲宽度调制(PWM)。     

继电器触点回跳消除电路

半导体技术的进展已使集成电路(IC)能够取代很多机械式继电器,但在任意极性的高电压大电流电路中,继电器仍然占据主导地位.然而,这类继电器的触点回跳会给下游电路带来麻烦.解决触点回跳的一种办法是把继电器与一个热插拔控制器结合起来.