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Presenting Yu-Shian Deng: The Implications of Deng''s Images in Stage Plays-Take Yu-Shian Deng: The Road Back Home and April Rain as Primary Examples
No full textMr. Yu-Shian Deng, the father of Taiwan folk song, had created many representative songs, such as “Four Seasons,” “Moonlight Sorrow,” “Craving for Wind of Spring” and “Flowers in a Raining Night” during his thirty-nine-year short life. To celebrate Mr. Deng's death centenary in 2005, Cultural Affairs Bureau of Hsinchu County Government published academic research on him. Performing arts groups also released several dramas based on the life and works of the Taiwanese composer. In those dramas, scriptwriters have been shaping many different characters from history. Most research still focuses on the analysis of Deng's compositions and historical research. Due to the lack of the studies on how Deng is presented in dramas, I, in this paper, used “historical research,” “field survey” and “drama analysis” as the main research method to study “Take Yu-Shian Deng: The Road Back Home” directed by Hesper Lang from Stone Theatre and “April Rain” produced by ALL MUSIC. The research also incorporated “Yu-Shian Deng of the Past and Present: Yu-Shian Deng―centenary Image Series,” “Yu-Shian Deng''s Documentary Film Hope Rain in April” and “Viva Tonal the Dance Age” from Taiwan Public Television and movie respectively. I will discuss four themes, namely “family background and age,” “talent and dreams,” “feeling in the world” and “interpersonal relationship.” Through integration of historical sources and dramas, the differences between Mr. Deng's life experiences and theatre image are revealed. The paper in the end will conclude Deng's “family background and age” is best shown in “Take Yu-Shian Deng: The Road Back Home” and “April Rain.” Both dramas are set in the 1930s but with different family influences. The former focuses on Deng's aunt's inspiration on music while the latter on his father's conformity to the anticipation of the ancestors, in which the offspring should be scholars of sinology, rather than composers. Scriptwriters apply Deng's compositions and reveal his “talent and dreams” through the arrangement of the repertories. “Deng's romance” can not be ignored. His close relation with popular music industry and his numerous creation on love make him the advocator of the new kind of thinking and the non-match making marriage. Because of all these factors, the plot of the dramas divert from reality and “Deng's romance” is always the one differing the most from real life. Deng's “interpersonal relationship” can be compared with his personality, aspirations and situations, all of which contributes to the multi-facets of Deng's presentation in drama. Therefore, we learn from the paper that “Take Yu-Shian Deng: The Road Back Home” and “April Rain” reveal “The combination of the historical research and the association of the scriptwriters, ” “The rich display of music” and “The shape of the composer Deng and his contemporary.” Mr. Deng became I wish the references and the differences between modern personal characters and drama images about Mr. Deng will be provided via this research.「台灣歌謠之父」鄧雨賢先生（1906-1944），在三十九年短暫的生命歷程當中，創作出例如〈四季紅〉、〈月夜愁〉、〈望春風〉、〈雨夜花〉等多首極具代表性之歌曲。西元2005年為鄧雨賢百年誕辰，新竹縣政府文化局出版鄧雨賢相關研究之學術刊物，民間表演藝術工作團隊亦陸續創作出以鄧雨賢為主題之各類戲劇作品，劇本創作者將鄧雨賢藉由戲劇表現方式，形塑出不同於史料所呈現之人物形象。目前鄧雨賢之相關研究仍以音樂作品分析與史料考證為主，對其戲劇形象之探討仍闕如，因此本文採用「史料考證」、「田野調查」與「戲劇分析」為主要研究方法，以頑石劇團郎亞玲編導之《鄧雨賢—返鄉路》與音樂時代劇場製作之《四月望雨》兩部戲劇作品為核心，加入《鄧雨賢之前世今生：鄧雨賢百年誕辰影像特輯》、《四月望雨：鄧雨賢紀錄片》和公視版、電影版《跳舞時代》等四部紀錄片為研究範疇，並將其分為「家世與時代」、「才華與理想」、「感情世界」及「人際關係」四大面向進行探討。透過文獻史料與戲劇作品之彙整，對照出鄧雨賢人生經歷與戲劇形象，作為呈現時代並適應演出效果所形成之差異。研究結論顯示，《鄧雨賢—返鄉路》和《四月望雨》兩部戲劇作品以一九三零年代為背景，分別就鄧姑之音樂啟蒙與鄧父之嚴遵祖訓，定立鄧氏家族一門三秀才之漢學傳統。透過鄧雨賢音樂作品之戲劇運用，瞭解劇本創作者藉由曲目編排所呈現鄧雨賢之才華與理想。鄧雨賢與流行唱片業關係密切，加上大量的情歌創作，使其成為新時尚文化及自由戀愛風氣的傳播者。在各項客觀因素串聯下，必然容易安排出與實際情形不盡相符之劇情走向，因此「感情世界的刻畫」遂成為鄧雨賢戲劇形象與真實形貌之最大歧異。以鄧雨賢為中心所擴展的人際關係網絡，可對比出主角之性格、理想與境遇，形塑出多面且周延之鄧雨賢戲劇形象。因此，本文進而可以獲知《鄧雨賢—返鄉路》和《四月望雨》兩部核心戲劇作品具有「結合史料與劇作者聯想」、「豐富之曲目呈現」以及「形塑才子與時代意涵」等特點。本文盼望能為鄧雨賢相關研究工作提供參考依據，並為探討近代人物形象與戲劇形象差異等相關論題，提供具體事例。表目次 IX
第一章 緒論 1
第一節 研究動機 1
第二節 文獻回顧 2
第三節 研究範疇 6
第四節 研究方法與論述架構 8
第二章 由「家世」與「時代」所定立的戲劇形象 11
第一節 鄧雨賢的家世—一門三秀才的漢學傳統 13
一、鄧氏家族之漢學淵源 13
二、《鄧雨賢—返鄉路》—鄧姑之音樂啟蒙 15
三、《四月望雨》—鄧父之嚴遵祖訓 18
四、小結 19
第二節 鄧雨賢的時代—象徵新潮與止於戰火的「跳舞時代」 19
一、從引領新潮到順應時局—鄧雨賢的創作環境 20
二、《鄧雨賢—返鄉路》—以台灣唱片業盛衰為引線 23
三、《四月望雨》—以繁華的台北大稻埕為背景 24
四、小結 25
第三節 劇中劇所構成之跨時空想像 25
一、紀錄片之類戲劇呈現形式 25
二、《鄧雨賢—返鄉路》今昔對比之劇中劇 26
三、《四月望雨》劇中劇《皇城驚奇》 30
四、小結 31
第三章 由「才華」與「理想」所顯明的戲劇形象 33
第一節 才華的顯現—鄧雨賢音樂作品的類別 33
第二節 鄧雨賢音樂創作理想的展現 35
一、鄧雨賢的音樂創作理念 35
二、《鄧雨賢—返鄉路》—完美主義創作者 37
三、《四月望雨》—親民藝術實踐者 38
四、小結 39
第三節 創作才華與靈感來源 40
一、鄧雨賢的創作才華與靈感 40
二、《鄧雨賢—返鄉路》—懷才不遇的作曲家 41
三、《四月望雨》—卓犖不羈的音樂才子 42
四、小結 42
第四節 芎林任教時期之轉變與調適 43
一、鄧雨賢的芎林任教生涯 43
二、《鄧雨賢—返鄉路》—壯志未酬身先死 44
三、《四月望雨》—雨過天青心境寬 44
四、小結 45
第四章 由「感情世界」刻畫生動的戲劇形象 47
第一節 鄧雨賢與鍾有妹的情感描繪 47
一、文獻中的鍾有妹 47
二、《鄧雨賢—返鄉路》—堅毅賢淑的客家女 49
三、《四月望雨》無怨守候的結髮妻 54
四、小結 55
第二節 鄧雨賢與純純的情感擬想 55
一、文獻中的純純 55
二、《鄧雨賢—返鄉路》—情路坎坷的苦命女 56
三、《四月望雨》紅顏薄命的癡情女 59
四、小結 61
第三節 虛擬的人物—莊雪蘭 62
第五章 由「人際關係」鋪陳豐厚的戲劇形象 65
第一節 鄧雨賢與家人 65
一、文獻中鄧雨賢與家人之關係 65
二、《鄧雨賢—返鄉路》—鄧姑 66
三、《四月望雨》—鄧父與鄧母 67
四、小結 68
第二節 鄧雨賢與古倫美亞公司同事 68
一、文獻中鄧雨賢與古倫美亞公司同事之關係 68
二、《鄧雨賢—返鄉路》—古倫美亞公司同事 69
三、《四月望雨》中的古倫美亞公司同事與朋友 80
四、小結 86
第三節 鄧雨賢與芎林國小同事 87
一、文獻中鄧雨賢與芎林國小同事之關係 87
二、《鄧雨賢—返鄉路》—芎林國小同事與朋友 88
三、《四月望雨》—芎林國小校長 90
四、小結 91
第六章 結論 93
附錄一 鄧雨賢年表（詳表） 97
附錄二 頑石劇團《鄧雨賢—返鄉路》演出紀錄表 104
附錄三 音樂時代劇場《四月望雨》演出紀錄表 105
附錄四 《鄧雨賢—返鄉路》第一版人物出場紀錄 106
附錄五 《鄧雨賢—返鄉路》第二版人物出場紀錄 110
附錄六 《鄧雨賢—返鄉路》第三版人物出場紀錄 112
附錄七 2008年《四月望雨》人物出場紀錄 114
附錄八 2008、2010《四月望雨》演員陣容與飾演角色對照 116
附錄九 《鄧雨賢—返鄉路》配樂專輯曲目對照 117
附錄十 《四月望雨》曲目及語言對照 118
附錄十一 參與頑石劇團演出工作紀錄 119
附錄十二 參與頑石劇團演出工作心得 122
附錄十三 《鄧雨賢—返鄉路》編導訪談 124
附錄十四 《四月望雨》演員電台專訪紀錄 136
參考書目 14
Coordinated capacity migration and expansion planning for semiconductor manufacturing under demand uncertainties
No full text
Synthesis and Characterization of Photo-induced Cross-linkable Poly(fluorene-co-triphenylamine) and Applications on Polymer Light-emitting Diodes
No full text在本研究中，利用Suzuki-Miyamura反應合成一系列三苯胺和芴的共聚高分子，並利用凝膠滲透層析儀、熱重分析儀、示差掃描卡計、循環伏安儀、吸收光譜與螢光光譜儀來研究其性質。
當三苯胺衍生物及光酸加入高分子，經由UV照光後可使其進行Friedel-Crafts的反應，交聯形成網路狀的結構，對溶劑具有抵抗的能力。應用於高分子發光二極體的多層元件中，作為電洞傳導層，ITO/光交聯的HTL/PVK-Ir(ppy)3-PBD/Mg-Ag，其驅動電壓為9.4 V，最大亮度為7630 cd/m2，效率可達15.8 cd/A。
利用Friedel-Crafts反應將高分子修飾上二茂鐵的單元，當三苯胺衍生物加入，經由UV照光進行交聯，這部分應用於高分子發光二極體中，來幫助電洞的注入，此外在循環伏安法測量下，可觀察到電聚現象發生。In this studies, a series of copolymers were synthesized by triphenylamine and fluorene via Suzuki-Miyamura reaction, which were characterized by gel permeation chromatography (GPC), thermal gravimetric analyzer (TGA), differential scanning calorimeter (DSC), cyclic voltammetry (CV), absorption and photoluminescence spectroscopy (PL).
The polymers were cross-linked by adding the triphenylamine derivative and the photo acid generator which catalyzed Friedel-Crafts reaction under UV irradiation. This approach can be implemented to PLED applications as hole-transporting layer. Under the optimized conditions, the polymeric light-emitting device (PLED) of ITO/photo-cross-linkable HTL/PVK-Ir(ppy)3-PBD/Mg-Ag, with a turn-on voltage of 9.4 V (100 cd/m2), a maximum brightness of 7630 cd/m2, and a current efficiency of 15.8 cd/A was achieved.
The polymer which modified with ferrocene units by Friedel-Crafts reaction could be cross-linked by triphenylamine derivative under UV irradiation. This moiety is introduced into the polymer light-emitting diodes to help the hole injection. In addition, the polymer could undergo electropolymerization by cyclic voltammetry
Aggregating Symmetric Authentication: From Motes to Clouds
No full text本論文研討使用對稱式密碼學生成的認證的彙集。這也表示認證標記是被對稱性地彙集，或者說就是單純以雜湊函數處理。本論文可概分為應用面與理論面。應用面包含四大主題：動態認證字典、感測網路內的廣播認證、多點路由內的
假訊過濾、以及可檢驗的加密雲儲存。
一、認證字典是一個泛型的計算問題，在於彼方如何檢驗他方是否正確記錄被寄存的資料。以往的解法（多沿用 Merkle 樹）或僅適合靜態認證字典，或使用低效率的資料結構。基於典型的 Merkle 樹，本文提出數個新穎的資料結構來處理動態認證字典，並支援負查詢。包含基數Merkle 樹、疊 Merkle 樹、和二元 Merkle 樹林。與往者不同，這些提案保持了原始 Merkle 樹的結構簡易性。
二、廣播認證是感測網路運作的基礎。受限於節點的有限運算能力和電力，尤其在無線感測網路中，感測點不應採用昂貴的非對稱運算。在這個原則上，μTESLA 的鏈狀設計成為可靠且持久的認證依據。但鏈型的優點在長期來看亦成為其缺點，使得更新認證源極為不便。簾（Curatin）利用壓縮 Bloom 過濾器彙集多重μTESLA。Curtain 增長μTESLA 使用期限與提高更新效率，並延續其自我修
復的功能。mCurtain 則是進階版的Curtain ，可用於多方廣播者的情境中，系統可動態增加或撤銷廣播者。使用 Curtain 和 mCurtain 的成本僅接受端需紀錄少量的點陣圖。
三、輕量化的在路由認證對多跳點網路，特別是無線網路，是難以根除的問題。。在無線環境下，中介的路由點是顯而易見的攻擊標的。攻擊者可任意植入無意義的假性通訊，導致多餘的訊息轉發、消耗節點資源、和降低網路效能。即使假訊最終被識別，路由點必然得為難以完全遏止的假訊付出代價。再次地，本文提出使用 Bloom 過濾器的低成本解法，稱為 EAB。每個使用 EAB 的路由點可在短時間內以輕量運算過濾絕多數的假訊。在多點路由中，最終能成功穿越網路的假訊量以冪次降低。
四、僅能保證機密性或完整性其一的雲儲存並不符現代資料安全要求。沒有加密的遠端儲存等同不可逆的資料外洩；沒有檢驗機制的加密儲存則可能被置換成無效亂碼而無法咎責。層雲（Stratus）針對這種矛盾提出完整解法。以用戶的觀點為本，Stratus 旨在提供對加密雲儲存的便利化存取與資料檢驗。此外，Stratus 隱性地保存原始目錄階層並允許不需要經過反向解密的無痛資料移植與分享。藉由虛設目錄（dummy list）的技巧，Stratus 可以進行懶刪除（lazy deletion）以提高系統效率。其他Stratus 的特點包含確實刪除和O(logN) 的負查詢等
最末，在理論面，本文推導彙集認證的安全極限。首先給予具有 On-The-Fly(OTF) 特性之彙集認證的嚴謹定義。這個定義將涵蓋前述之Curtain、mCurtain、和 EAB 等。接著結合消息理論、認證理論和Bloom 過濾器演算，推導與證明此彙集認證的安全極限。結果呼應過去獨以認證理論或密碼學推論的文獻。
Merkle 雜湊樹和 Bloom 過濾器這兩個古老又簡單的資料結構是本文使用的主要認證技術。讀者將發現即使在非對稱式密碼學主宰的廿一世紀，善用與變化舊工具有機會能更有效率解決新問題。This thesis discusses the aggregation of authentication created purely from symmetric cryptography. It also means that the authentication tags are aggregated in a symmetric way, or simply via hash functions. The contents of this work can be can be roughly classified
as the applications and theory parts.
From the aspect of applications, it consists of four computational applications regarding data and communication authenticity, spreading from micro-scaled sensor networks to macro-scaled cloud. These topics include (1) dynamic authenticated dictionary, (2) broadcast
authentication in sensor networks, (3) en-route false injection filtering, and (4) verifiable encrypted cloud storage. Two canonical hash-based data structures are employed, the Merkle Tree (MT) and the Bloom Filter (BF).
1. Dynamic authenticated dictionary: As a generic computation paradigm, the authenticated dictionary is to verify that the delegated remote correctly store the outsourced data. Prior solutions, mostly adopting the Merkle Tree (MT), are either only suitable for static dictionary or lack of efficient structures. We propose several novel approaches to extend the MT''s ability of data update and negative query. Unlike the
other hash-based schemes for authenticating dynamic data, these proposals retains the structural simplicity of MT.
2. Broadcast authentication: Broadcast authentication (BA) is a crucial foundation of wireless sensor networks (WSN). Limited by computation and energy resources, the sensor motes should not directly adopt asymmetric cryptography. Hence, the μTESLA protocol has been acting as the major role for doing BA in WSN. The chain structure of TESLA, however, brings inconvenience to update of authentication source. To prolong durability and support self-healing property, the Curtain applies compressed Bloom filters (CBF) to multiple μTESLA. It greatly reduces the network communication overhead at the cost of a moderate memory usage in receiving motes. The mCurtain, an extended version of Curtain, works for scenario of multiple senders. It allows the system to dynamically add and revoke senders.
3. False injection filtering: Lightweight en-route authentication is a challenging task in wireless multi-hop networks. An adversary can inject false data into the system, incurring redundant message forwarding, consuming node resources, and degrading network performance. Although the injection might be identified, en-routers have paid price for them. We utilize Bloom filter techniques, again, to build an authentication
manifest called en-route authentication bitmap (EAB). EAB helps nodes on the routing path to filter out false data in high success rate, thus confine the injection attacks within the one or two hops from the adversary. The evaluation shows that EAB effectively protect the forwarding path of tens of hops with only a few bytes cost.
4. Verifiable encrypted cloud storage: A cloud storage service is never sufficient if it only guarantees one of data confidentiality and integrity. Remote storage without encryption could expose private information to outsiders; while storage without integrity could be appended with garbled and useless cipher. This paper presents the Stratus, an integrated encrypted storage atop of heterogeneous cloud storage.
Standing on user''s perspective, Stratus focuses on offering transparent and convenient access and integrity verification of the data outsourced. Also, Stratus preserves implicitly the folder hierarchy of the original storage and allows painless data migration and sharing without backward decryption. By the technique of dummy list, Stratus is able to perform lazy deletion, reducing access overhead. Other salient features of Stratus include assured deletion and space query in O(log n).
Finally, from the aspect of theory, the work derives a rigorous proof of the security extreme of aggregated authentication. First, we give a precise definition of Aggregate message authentication codes (AMACs) with the property of one-the-fly (OTF) verification.
The AMACs encompass portions of each previous mentioned application. Combing information theory, authentication theory, and Bloom computation, the theoretical security extreme of such authentication is derived and proved. The results correspond to prior
research adopting other methodologies in literature.
The Merkle trees and Bloom filters, both ancient and simple hash-based structures, are the two foundations of this thesis. Readers will find that the old tools might be more efficient in tackling emerging problems, even in the modern computational world dominated
by asymmetric cryptography.1 Introduction 1
1.1 Aggregated Authentication......................... 2
1.2 Authenticated Dictionary.......................... 3
1.3 Broadcast Authentication.......................... 4
1.4 False Injection Filtering........................... 6
1.5 Cloud Storage Security ........................... 8
1.6 Contribution Summary ........................... 11
1.7 Organization ................................ 14
2 Preliminaries 15
2.1 Merkle Tree................................. 15
2.1.1 Authentication Path......................... 15
2.2 Bloom Filters ................................ 16
2.2.1 Standard Bloom Filters....................... 17
2.2.2 Compressed Bloom Filters..................... 17
2.2.3 Counting Bloom Filters ...................... 19
2.2.4 Security of Bloom Filters...................... 20
2.3 μTESLA .................................. 21
2.3.1 Standard μTESLA ......................... 21
2.3.2 Tree-based μTESLA ........................ 23
I
3 Dynamic Authenticated Dictionary 27
3.1 Radix Merkle Trees............................. 28
3.1.1 TrimmedRMT ........................... 29
3.2 Stacked Merkle Trees............................ 31
3.3 Binomial Merkle Forest........................... 33
3.4 Evaluation.................................. 35
3.5 Related Works................................ 36
4 Curtain & mCurtain 39
4.1 Curtain Overview.............................. 40
4.2 Analysis................................... 45
4.3 Multiple Curtain............................... 49
4.3.1 Procedures ............................. 50
4.3.2 Analysis .............................. 51
4.4 Implementation ............................... 53
4.4.1 Curtain ............................... 53
4.4.2 mCurtain .............................. 54
4.5 Related Work ................................ 55
5 Filtering False Injection 59
5.1 Problem Definition ............................. 59
5.1.1 System Model ........................... 59
5.1.2 Threat Model............................ 60
5.2 Basic Design of Filtering .......................... 61
5.2.1 BasicTechnique .......................... 61
5.2.2 Protocol Description ........................ 62
5.2.3 Implementation of HashSet .................... 64
5.2.4 Security Analysis.......................... 66
5.3 Random Padding .............................. 68 II
5.3.1 Restraint of EAB.......................... 68
5.3.2 Further Enhancement........................ 69
5.4 Related Work ................................ 72
6 Cloud Storage Security 73
6.1 Problem Formulation ............................ 74
6.1.1 Cloud Model ............................ 75
6.1.2 Threat Model............................ 75
6.1.3 Design Goals............................ 76
6.2 Stratus Encryption ............................. 77
6.2.1 Data Structure ........................... 77
6.2.2 Encryption Strategy ........................ 80
6.3 Stratus Integrity Proof............................ 81
6.3.1 BMF in Stratus........................... 81
6.3.2 Stratus Integrity Checking ..................... 83
6.4 Data Share in Stratus ............................ 85
6.4.1 The Virtual Shared Folder ..................... 85
6.4.2 Data Share and Revoke....................... 86
6.4.3 Practical Scenario.......................... 87
6.5 Performance Analysis............................ 88
6.5.1 The BMF Performance....................... 88
6.5.2 Storage Overhead.......................... 88
6.5.3 File Operations........................... 90
6.6 Discussion.................................. 91
6.7 Related Work ................................ 92
6.7.1 Cryptography FileSystems..................... 92
6.7.2 Proofs of Possession or Retrievability . . . . . . . . . . . . . . . 95
7 Lower Bound of Aggregation 99
7.1 Preliminaries ................................ 99
7.1.1 System Model ...........................100
7.1.2 MAC, Attack, and Lower Bounds .................100
7.2 AMACs:Definition and Lower Bound...................101
7.2.1 Definition of AMACs .......................102
7.2.2 Attacks on AMACs.........................103
7.2.3 Lower Bound of AMACs......................103
7.2.4 Relation with Former Works....................106
7.2.5 Security of AMACs ........................106
7.3 Constructing AMACs via Bloom Filters..................107
7.3.1 Bloom-based construction, xBF-AMACs . . . . . . . . . . . . . 108
7.3.2 Primitive Analysis .........................109
7.3.3 Improvement by Subdivision....................109
7.3.4 Strengthening AMACs with Padding . . . . . . . . . . . . . . . 111
7.3.5 The Heuristics ........................... 111
7.3.6 Lower Bounds with Padding .................... 117
7.4 Security of BF-AMACs........................... 117
7.5 Comparison.................................119
7.6 RelatedWork ................................120
8 Conclusion................................12
The determinants of target price forecasting errors
No full text以往關於分析師的研究都局限於盈餘預測與投資建議，近幾年，國外開始有研究指出，分析師的目標價預測的確提供了投資評等與盈餘預測以外的資訊，顯示目標價有其重要性。然而，受限於樣本缺乏，所以國內很少有目標價預測誤差的研究。本文利用鉅亨網所提供的券商目標價預測與原始分析報告，並參考Bonini et al.(2006)，利用兩種策略：買進並持有策略、理想世界完美策略，以及兩種目標價預測誤差的衡量方法：過度預測程度、預測的絕對誤差，對兩份樣本進行迴歸檢定。
根據第一部份樣本的結果，發現外資券商的預測誤差的確顯著的小於本國券商，但是在控制了其他因素之後，顯著性降低。而在投資評等方面，強力買進與強力賣出等級的投資建議的預測誤差最大，在投資評等修正方面，降級的預測誤差最小。而從第二部份的結果，發現分析師的經驗越多，預測誤差越小；報告字數越多，則越容易過度自信，因而預測誤差越大，然而，在控制了其他因素之後，顯著性都降低了。而在評價方法則並沒有顯著且ㄧ致的差異。不論在什麼策略下，目標價所隱含的報酬率越高、市場報酬越低，則目標價預測誤差也越大，而且越有過度預測的傾向，這兩個因素是最顯著而且一致的。
為了避免樣本選擇偏誤，或是檢驗結果受到極端值的干擾，本文中也進行的穩健性測試，發現結果並無太大的不同。Abstract
Previous research on analyst reports primarily examines revisions in stock recommendations and earnings forecasts. Recently some foreign studies have found that target price contains information even in the presence of earnings forecasts and stock recommendations. However, domestic research rarely focuses on target price for lack of database. For this paper, I use two strategies and two measures considered by Bonini et al.(2006), and run regressions on two samples from cnYES.com.
According to the results of the first sample, foreign brokerages’ errors are significantly smaller than those of domestic brokerages’. However, after controlling for other variables, the errors become significantly lower. The forecasting errors are the largest in strong buy and strong sell and the smallest in downgrade. The results of the second sample show that the forecasting errors made by the analysts are smaller when the analysts have more experiences and when the reports contain fewer words. Similar to the first sample, the errors are significantly lower after controlling for other variables. The different valuation methods do not change the magnitude of the forecasting errors. When the implied returns are higher or the market returns are lower, the forecasting errors are significantly and consistently larger.
To avoid sample selection bias or the effect of outliers, this thesis also examines the robustness of the regressions. The results are quite similar to the ones obtained by running simple regressions.目錄
第壹章、緒論 - 1 -
第一節、研究動機 - 1 -
第二節、研究目的 - 3 -
第貳章、文獻回顧 - 4 -
第参章、樣本描述 - 7 -
第一節、樣本選擇 - 7 -
第二節、券商投資評等 - 9 -
第三節、樣本分布 - 10 -
第肆章、研究方法 - 16 -
第一節、變數設定 - 16 -
第二節、研究假說 - 24 -
第三節、實証模型 - 25 -
第伍章、實證結果 - 27 -
第一節、敘述性統計 - 27 -
第二節、實證結果 - 30 -
第三節、穩健測試 - 36 -
第陸章、結論與建議 - 55
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
An Exploratory Study of Value-added Applications for Yu-Shian Deng’s Digital Archive: A Case Study of Cultural Product Design
No full text台灣音樂之父鄧雨賢先生的作品家喻戶曉，他的作品如「四、月、望、雨」四大名曲為大眾熟知，堪稱為台灣音樂史的重要里程碑。本研究根據桃園縣文化局之「鄧雨賢數位博物館」建置案之典藏經驗，運用數位典藏之素材，結合文化創意，進行文化產品的開發與加值。藉由數位典藏素材轉換至文化產品設計之過程，提出數位典藏應用於文化產品之加值脈絡與流程。本研究透過數位典藏品的分類與分析，建構出一套數位典藏加值應用之模式，並以實際設計案例驗證數位典藏加值應用之可行性。以期待為未來歷史音樂人物之數位典藏加值應用提供參考之模式。Mr. Yu-Shian Deng, esteemed as the Father of Taiwan Music, composed numerous well-known folk songs that are considered as the milestones of the Taiwan music history. The Cultural Affairs Bureau of Taoyuan County in Taiwan has established a digital archive of Mr. Deng to commemorate his achievement. This study describes the authors’ experiences in cultural product design for the archive. Based on the analyses of the archival content and historical background, this study proposed a design approach that emphasizes the content and context characteristics of the archive. This approach may be applied in the future value added applications and cultural product design projects for people-centered archives
Threshold Elliptic Curve Digital Signature Algorithm (Threshold ECDA)
No full text橢圓曲線數位簽章演算法 (ECDSA) 是被廣為應用的簽章標準。我們推演出了門檻式的橢圓曲線數位簽章演算法。在我們提出的機制中，原本的 ECDSA 簽署者被分散成 n 個成員的群體。在 t<n/2 的前提下，該群體以秘密分享的方式共享某個橢圓曲線私密金鑰。
簽署一個合法的簽章需要群體中至少 t 個成員，任何少於 t 的共謀將無法偽造簽章也無法獲得其他成員的部分私密金鑰。
即使在某些成員企圖破壞運算過程的情況下，其他的成員可藉著互動式零知識驗證的技巧辨識出欺騙者。我們的機制混合了可驗證秘密分享、零知識與分散式運算的技巧。ECDSA is a widely adopted standard.
We present a (t,2t,n) threshold Elliptic Curve Digital Signature Algorithm (ECDSA) scheme.
In our scheme, the regular ECDSA signer is distributed into a -participant group which shares the elliptic curve private key by Secret Sharing (SS) with the parameter 2t<n.
To sign a valid signature with no one's secret revealed, it takes at least 2t participants of the group to collaborate.
Coalition of less than t participants can not forge any signature nor require other's partial private keys.
Even when some cheaters try to spoil the final result, the other honest participants still can identify them by interactive zero-knowledge proof.
Our scheme is composed of verifiable secret sharing, zero knowledge proof and many distributed computation skills.1. Introduction---3
2. ECC and ECDSA---6
2.1 Elliptic Curve Cryptosystem---6
2.2 ECDSA---8
3. Preliminaries---10
3.1 Shamir's Secret Sharing---10
3.2 Verifiable Secret Sharing---11
3.3 Distributed Multiplication---12
3.4 Distributed inverse Derivation---15
4. Proposed Threshold ECDSA---17
4.1 System Model---17
4.1.1 Communication Model---17
4.1.2 Adversary Model---17
4.2 Threshold-ECDSA Scheme---18
4.3 Cheater Detection---19
4.4 Discussions---20
4.5 Threshold Level---20
5. Security Analysis---22
5.1 Correctness---22
5.2 View---22
5.3 Unforgeability---23
6. Conclusions---26
Appendix A Pedersen's Distributed Key Generation---29
Appendix B BGW-Method---31
Appendix C Zero-Knowledge Proof for Multiplication---3
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