Jason Chuang

• MD at National Cheng Kung University

Sociologists wishing to employ topic models in their research need a helpful guide that describes the variety of topic modeling procedures, their issues, and various means of resolving them so as to convincingly answer sociological questions. We present this overview by recounting a series of our prior collaborative projects that have employed and...

Keyphrases aid the exploration of text collections by communicating salient aspects of documents and are often used to create effective visualizations of text. While prior work in HCI and visualization has proposed a variety of ways of presenting keyphrases, less attention has been paid to selecting the best descriptive terms. In this article, we i...

Topic models aid analysis of text corpora by identifying latent topics based on co-occurring words. Real-world deployments of topic models, however, often require intensive expert verification and model refinement. In this paper we present Termite, a visual analysis tool for assessing topic model quality. Termite uses a tabular layout to promote co...

Statistical topic models can help analysts discover patterns in large text corpora by identifying recurring sets of words and enabling exploration by topical concepts. However, understanding and validating the output of these models can itself be a challenging analysis task. In this paper, we offer two design considerations - interpretation and tru...

As textual datasets grow in size and scope, social scientists need better tools to help make sense of that data. Despite the natural applicability of topic modeling to many such problems, word counts and tag clouds are often used as the primary means of gleaning information from textual data. We characterize two barriers to adoption encountered dur...

It is well known that it is much easier to find open-loop plans in partially-observable environments than it is to compute full poli-cies. It is less well appreciated that open-loop plans can provide good (sometimes even optimal) performance in some real-world robotic planning problems. In this paper we identify several condi-tions under which open...

本研究主要利用微機電技術製作微流道熱沉，利用去離子水及五種不同成份及體積濃度的奈米流體為工作流體，希望藉由懸浮的氧化銅及銅奈米顆粒之奈米流體在熱傳上的優越特性，能獲得比去離子水更好的散熱效果，以改善電子元件的散熱問題。為比較去離子水與奈米流體在微流道熱沉上的散熱效果，必須瞭解微流道熱沉底部溫度變化情形，故在實驗架構上，設計一微流道熱沉測試模組，藉以獲得所需相關數據，並改變三種流量，藉由量測結果，分析微流道熱沉之熱阻、熱沉底部溫度、紐塞爾數，將去離子水與奈米流體作一比較。實驗結果發現微流道熱沉熱阻會隨流量增大而降低，而奈米流體在低流量時有較低的熱阻，在最大流量時熱阻卻比去離子水還高，且沉積情形嚴重，沉積也隨體積濃度增大而越嚴重，因此使用奈米流體時，須改善其沉積情形，方能有助於提升熱沉之性能。...

本研究主要利用微機電技術製作微流道熱沉，利用去離子水及五種不同成份及體積濃度的奈米流體為工作流體，希望藉由懸浮的氧化銅及銅奈米顆粒之奈米流體在熱傳上的優越特性，能獲得比去離子水更好的散熱效果，以改善電子元件的散熱問題。為比較去離子水與奈米流體在微流道熱沉上的散熱效果，必須瞭解微流道熱沉底部溫度變化情形，故在實驗架構上，設計一微流道熱沉測試模組，藉以獲得所需相關數據，並改變三種流量，藉由量測結果，分析微流道熱沉之熱阻、熱沉底部溫度、紐塞爾數，將去離子水與奈米流體作一比較。實驗結果發現微流道熱沉熱阻會隨流量增大而降低，而奈米流體在低流量時有較低的熱阻，在最大流量時熱阻卻比去離子水還高，且沉積情形嚴重，沉積也隨體積濃度增大而越嚴重，因此使用奈米流體時，須改善其沉積情形，方能有助於提升熱沉之性能。...