Nonpoint Source Pollution Control in the City of Austin

This report mentions the presence of rooted aquatic plants in the deltas of Waller Creek.Waller Creek Working Grou

Feasibility and Environmental Evaluation of Water Quality Control Alternatives for Town Lake, Austin, Texas Volume III

This report presents the results of a water quality study conducted on Waller and surrounding creeks. This information includes nitrogen unit load, TOC unit load, runoff and other data.EXECUTIVE SUMMARY: This report provides a detailed feasibility analysis of a proposed pilot project for demonstrating the effectiveness of several candidate alternatives for the restoration of Town Lake water quality conditions. It also includes an environmental evaluation of both the pilot project and a lake-wide restoration program, which incorporates the general methodology of the pilot project and the recommendations developed in the previous report, the Alternatives Study. Based on these analyses and evaluations, all of the components of the pilot project were determined to be feasible and to have primarily positive secondary (non-water quality related) environmental impacts. Therefore, the City is recommending the implementation of the entire pilot project as described in this report as a key element in the overall restoration of Town Lake.Waller Creek Working Grou

[[alternative]]Web-based porfolio output system: a study on moodle

碩士[[abstract]]學習檔案保存了學習者的成長過程與學習成果，展現了學習者的努力過程。不但可以讓師長瞭解學習者的學習狀況進行適性化的教學或輔導，更能讓學習者複習所學進而反思自身，甚至成為未來升學、就學的能力證明。近來在網路上進行線上學習風氣隨著網路技術的進步而愈加發展，保存線上學習的學習歷程檔案也更顯重要，然而網路教學平台系統需要更新，機器本身亦可能損壞，甚至在學習者完成課程或畢業後，個人資料往往被刪除，學習檔案也付之一炬。本研究針對上述問題於網路教學平台上，建置一個學習檔案的輸出系統，讓學習者可以自行下載個人在教學平台上的學習檔，彌補資料損失的遺憾。並因應網路可流通的特性，製定網路教學平台學習檔案之XML規範，讓學習檔案可以在不同平台間交換使用。 本研究獲得的結論有以下幾點： 一、網路教學平台學習檔案輸出系統包含的內容有：1、個人資料2、課程資訊3、課程講義4、作品集5、反思內容6、教師回饋7、學習活動資訊。 二、網路教學平台輸出系統的製作應有之考量： 1、內容交換格式考量：教學平台學習檔案內容的輸出，需包含XML並定義各項欄位與內容，做為互相溝通的橋樑。 2、展示介面考量：在觀看的介面需採用可以跨平台的檔案格式，例如HTML、FLASH檔案格式，讓使用不同作業系統的使用者都能瀏覽。另外，展示介面亦要清楚、美觀，方便使用者觀看。 3、使用介面考量：網路教學平台學習檔案輸出系統的操作必需簡單方便[[abstract]]As learning process and performance are both recorded in learning portfolios, teachers can modify instruction and guidance in accordance with their individual differences and learners can review and give more feedback on what they learned. Also, learning portfolios may be the proof of learners’ ability for advanced learning. In recent years, learning on-line is widely applied with the improvement of internet technology and how to save on-line learning portfolios becomes another important issue. However, problems resulting from the update of the internet learning system, mechanical maintenance and the deletion of profiles with the end of the courses or graduation make it difficult to save on-line learning portfolios permanently. To deal with the above problems, this study aims to build an output system of on-line learning portfolios on the internet instruction platform and then learners can download their learning profiles. Furthermore, in accordance with the wide currency of network, the purpose of this research is to set up norms of XML to exchange learning portfolios among different platforms. Conclusions are as follows: First, the contents of output system include personal profiles, introduction of lectures and courses, learning materials, works or productions, reflections, teachers’ feedback and information of learning activities. Second, some suggestions for exchanging learning portfolios among internet instruction platforms are listed below. In terms of the content format, XML and definition of columns and contents are considered. In terms of display interface, file format such as HTML and Flash are proposed in order that learners can read on different operating systems. Also, clear and pleasing interface is recommended. Lastly, in terms of user interface, user-friendly and convenient interface to operate is suggested.[[tableofcontents]]第一章　緒 論 1 第一節　研究背景與動機 1 第二節　研究目的 3 第三節　研究問題 3 第四節　研究範圍與限制 4 第五節　名詞解釋 4 第二章　文獻探討 6 第一節　學習檔案的起源、理論基礎與定義 6 第二節　學習檔案的功能、發展與限制 10 第三節　電子學習檔案之研究 15 第四節　網路平台學習檔案的內容分析 29 第五節　Moodle用於教學與教育理論之結合 40 第三章　研究方法與設計 46 第一節　研究架構 46 第二節　研究方法 47 第三節　研究工具與設備 50 第四節　分析階段 52 第五節　設計階段 59 第六節　評鑑計畫 70 第四章　研究發現與討論 72 第一節　系統使用流程與操作說明 72 第二節　評鑑結果 78 第三節　系統修正 84 第五章　結論與建議 86 第一節　結論 86 第二節　建議 87 參考資料 92 中文部份 92 英文部份 96 附錄 99 附件一 訪談大綱 99 附件二 使用者評鑑表(學生版) 100 附件三 使用者評鑑表(教師版) 101 附件四 專家評鑑表 102 表目錄 表2-1學習檔案定義表(研究者整理) 9 表2-2國內外學者學習檔案功能表(研究者整理) 10 表2-4學習檔案分類表(研究者整理) 29 表2-5 Moodle模組使用與建構主義教學對應表 45 表3-3訪談大綱細目 50 表3-4-1 訪談意見結果表 53 表3-4-2需求整合與Moodle平台學習檔案內容對應表 58 表3-5-1 LMS Portfolio XML欄位 59 表3-5-2 Moodle學習平台學習檔案輸出XML欄位表 64 表4-2-1使用者評鑑結果表 79 表4-2-2教學者評鑑結果表 81 表4-2-3專家評鑑結果表 82 表4-3 已修正之語句列表 85 圖目錄 圖1-1學習檔案各階段之問題與缺點 2 圖2-3-1 eFolio Minnesota E-Portfolio畫面 17 圖2-3-2 Indiana@work E-Portfolo畫面 17 圖2-3-3 丹佛大學The DU Portfolio Community system E-Portfolio畫面 18 圖2-3-4 內布拉斯加大學E-Portfolio系統 18 圖2-3-5 筆者實際使用OSP系統畫面 19 圖2-3-6智慧大師功能表(取自江世勇，2004) 24 圖2-3-7 WebCT功能一覽表(楊宗瑋，2006) 24 圖2-3-8 Moodle系統環境 27 圖2-4 IEEE P1484.2.26 Learner Portfolio Information示範 39 圖3-2系統開發程序圖 49 圖3-5-1資料庫與學習檔案展示關係圖 66 圖3-5-2 理想的資料交換系統 67 圖3-5-3 學習檔案輸出簡圖 67 圖3-5-4 學習檔案輸出系統使用流程圖 69 圖4-1-1 教師使用線上資源模組 73 圖4-1-2 教師使用教學活動模組 73 圖4-1-3教師端系統管理選項增加部份 73 圖4-1-4 學習檔案備份的設定 74 圖4-1-5學生端出現學習檔案備份的按鈕 75 圖4-1-6選擇備份項目 75 圖4-1-7確認備份畫面 75 圖4-1-8下載壓縮檔案圖 76 圖4-1-9點選HTML學習檔案展示介面 76 圖4-1-10展示學習檔案畫面 77 圖4-2 Flash教學課程 78 圖4-3更改過的學習檔案界面 84[[note]]學號: 794100049, 學年度: 9

Doubly diastereoselective conjugate addition of homochiral lithium amides to homochiral alpha,beta-unsaturated esters containing cis- and trans-dioxolane units.

As part of a long-term goal directed towards the ab initio asymmetric synthesis of unnatural amino sugars, the doubly diastereoselective conjugate addition reactions of the antipodes of lithium N-benzyl-N-(alpha-methylbenzyl)amide to a range of homochiral alpha,beta-unsaturated esters containing cis- and trans-dioxolane units was investigated. These reactions resulted in "matching" and "mismatching" effects. In the "matched" cases a single diastereoisomer of the corresponding beta-amino ester (containing three contiguous stereocentres) is produced. Upon conjugate addition to a homochiral alpha,beta-unsaturated ester containing a cis-dioxolane unit, in the "mismatched" case it is the stereocontrol of the substrate which is dominant over that of the lithium amide, whilst upon addition to homochiral alpha,beta-unsaturated esters containing a trans-dioxolane unit the stereocontrol of the homochiral lithium amide is dominant. Hydrogenolytic N-deprotection of the beta-amino ester products of conjugate addition gives access to polyoxygenated beta-amino acid derivatives