An investigation on the microstructural and electrical properties of La0.85DxSr0.15–xGa0.8Mg0.2O2.825 (D = Ba and Ca) electrolytes in solid oxide fuel cells

La_0.85D_xSr_0.15–xGa_0.8Mg_0.2O_2.825 (D = Ba and Ca, x?=?0, 0.01, 0.03, 0.05, and 0.07) electrolytes were synthesized using a solid-state reaction method, calcined at 1400?°C for 5?h, and sintered at 1400?°C for 5?h. The microstructures, electrical properties, and cell performances of the electrolytes and fuel cells were analyzed by X-ray diffraction, scanning electron microscopy, impedance analysis, and electrochemical analysis. La_0.85Ba_xSr_0.15–xGa_0.8Mg_0.2O_2.825 (LBSGM) and La_0.85Ca_xSr_0.15–xGa_0.8Mg_0.2O_2.825 (LCSGM) exhibit a dense structure and a cubic perovskite phase. Further, they contain small amounts of a secondary phase. The lattice constants of LBSGM and LCSGM are 0.3913–0.3914?nm and 0.3906–0.3909?nm, respectively. The average grain size of the sample increases with increasing Ba²⁺ or Ca²⁺ content. The conductivity of LCSGM (0.197–0.174?S/cm) is usually higher than that of LBSGM (0.181–0.162?S/cm) at 800?°C. The cells with La_0.85Sr_0.15Ga_0.8Mg_0.2O_2.825 and La_0.85Ca_0.03Sr_0.12Ga_0.8Mg_0.2O_2.825 electrolytes exhibit high open-circuit voltages and maximum power densities of 0.96?V and 542?mW/cm² and 0.94?V and 567?mW/cm², respectively, at 800?°C.     

The gift of authoritarian experience: The determinants of online political efficacy in new democracies

This paper represents an effort to investigate the impact of perceived new media credibility on citizens’ online political efficacy (OPE) in new democracies. Unlike their counterparts in mature democracies and outright authoritarian states, citizens of new democracies face the challenge to reconcile their democratic present with the authoritarian past. Their online political behaviors therefore are likely to be shaped by the interaction between democratic realities and authoritarian legacies or memories. The current study argues that in new democracies, the relationship between credibility of new media and OPE is contingent upon citizens’ authoritarian experience. Since authoritarian experience delivers a sense of relative acquisition through a comparison mechanism, it is expected to play a positive role in moderating the association between credibility of new media and OPE. We test the proposition by studying a sample of Taiwanese residents interviewed during the 2015 Taiwan Communication Survey (TCS). Our empirical analyses produce strong supportive evidence for the positive conditioning effect of authoritarian experience and the result is robust to different model specifications and alternative measures of authoritarian experience.     

台湾地域主义建筑发展历程

地域主义是台湾近现代建筑发展过程中相当特殊的一种现象,本文回顾了从19世纪末西方传教士引进的地域主义,历经日本统治时期、战后20世纪50～90年代,以至21世纪不同阶段的地域主义建筑发展特色。     

一个批判性回顾与展望——台湾大学建筑与城乡研究所教研实践

从理论与专业的角度,回顾过去台湾大学建筑与城乡研究所的教育目标和在知识上的主要发展线索,以及实际执行时遇到的困难。在教育目标上,面对一个发展中国家的教育资源不足的现实,专业的通才教育是核心教师共同的目标,针对建筑、城市规划、地景建筑三者的共享知识,提供规划与设计的专业训练。由于教师职业多为台湾归国留学生中的一时之选,以及发扬开放而自由的台大学风,学生与教师适时地响应了当时台湾社会的变动,这主要表现在对一系列的都市运动的响应之上,取得了一定程度的影响力。面对当前空间与社会的巨变,首先是学生们提出改革的要求,于是教师提出新的因应方向,响应他们的期望,推动机构本身在改革过程所急需的人事、教学与研究的再建构。这是建筑与城乡研究所面对的21世纪的挑战。     

台湾住宅的文化策略

文章探讨了从20世纪初到21世纪初,台湾住宅在社会变迁中所呈现的文化策略。文中讨论了台湾在日本殖民时期的闽洋折衷住宅,战后第一代建筑师所建之充满中国精神的私人住宅, 20世纪末、21世纪初大量出现的顶级住宅以及重新反省地域特色及传统空间的小住宅与小型集合住宅。     

从保护法规看台湾地区的建筑遗产保护

台湾地区以"文化资产保存法"为依据制订有多个专项法规,在建筑遗产的保护管理、灾害应对、保护技术的传承与人才培养等多个方面做出了详细的规定,值得学习与借鉴。     

台湾农地释出政策对国土资源合理开发利用的启示

本文回顾了1993年以来的台湾农地释出政策演进历史,分别从探索中的释出阶段、转型期的理性释出阶段和新"国土"功能分区下的农地释出阶段对这一过程进行解读;揭示了台湾农地释出政策经历了从工商业用地需求导向到注重农用地整体统筹规划利用,从关注台湾本土发展转型到因应国际形势变化的发展历程;进而讨论了对大陆建设用地合理扩张和耕地保护的启示。     

Comparison of food values for consumers’ preferences on imported fruits and vegetables within Japan,Taiwan, and Indonesia

International agricultural trade in fruits and vegetables has received much attention as an effective method to create a sustainable agriculture industry for a country. This study focuses on consumers’ perceptions of food values toward imported fruits and vegetables in Japan, Taiwan, and Indonesia by using the Best-Worst Scaling method. Seven food values were examined in this study: labeling product origin, food safety certification, high quality appearance, domestic rarity, price, how the product was grown, and freshness. An online survey was conducted and 1,350 total valid respondents were collected (500 Japanese, 333 Taiwanese, and 517 Indonesian). The Latent Class Multinomial Logit model was used to analyze consumers for each country. Results revealed that food safety certification and freshness were found as the most important and second most important food values for the majority group of consumers in each of these three countries, respectively. However, the remainder of food values do not have the same importance for each country. The study should help governments and international marketers enhance their agricultural trade policies and marketing strategies for these targeted markets.     

我国台湾地区民间参与公共建设立法的启示

在我国台湾地区,政府对于民间参与公共建设事业给予大力扶持且已形成完善的法律保障机制。而大陆地区由于缺乏相关法律政策的指导与技持,已成为阻碍民间参与公共建设事业发展的重要因素。基于对台湾地区民间参与公共建设事业发展的介绍,探讨相关法律规范的作用,为大陆地区相关法律的制定提供借鉴。     

Incidence of citrinin in red yeast rice and various commercial Monascus products in Taiwan from 2009 to 2012

Red yeast rice, produced by the fermentation of red yeast (Monascus purpureus) with white rice, has long been used in food colouring and meat preservation in Asia. Recently, powdered red yeast rice and its formulated products, used worldwide as dietary supplements, have the ability of reducing blood-lipid levels in humans. However, some Monascus strains could produce the mycotoxin citrinin as a secondary toxic metabolite so that commercial Monascus products are of a serious concern to the public now. The aim of this study was to obtain information about the occurrence of citrinin in red yeast rice and various commercial Monascus products in Taiwan from 2009 to 2012. A simple and rapid HPLC-fluorescence method was developed to detect citrinin in red yeast rice and Monascus products. The method's performance was acceptable in terms of recoveries, which ranged from 81.2% to 94.3% for citrinin-spiked samples at levels of 0.1, 1 and 10 mg/kg, and the relative standard deviation ranged from 2.5% to 5.7%. The limit of quantification of 0.05 mg/kg was achieved. The survey results showed that among total 302 samples, the incidences of citrinin contamination were 69.0%, 35.1% and 5.7% for red yeast rice (raw material), dietary supplements and red yeast rice processed products, respectively. The mean contamination levels were 13.3, 1.2 and 0.1 mg/kg for red yeast rice (raw material), dietary supplements and red yeast rice processed products, respectively. Such high citrinin contamination rate and level is worthy of note.