As the Internet-of-everything continues diversifying, wireless nods sensors, wearables, and smart-objects will require mature technologies to harvest energy from the environment in which they are installed. Out of the many energy forms, solar and artificial light are constantly present and the utilization solar technologies including organic photovoltaics can provide advantages including flexibility, semitransparency, and lightweight. Additionally, the incredibly low environmental footprint and reduced manufacturing costs associated with solution processing can provide an edge for entry into the industrial and consumer markets. While the utilization of conjugated polymers and nonfullerenes elevated the efficiencies of organic photovoltaic for commercialization, increasing the technological readiness level requires the development of protocols to translate lab performance of state-the-art-materials to scalable manufacturing techniques that can be adapted for roll-to-roll processing. This dissertation demonstrates the full fabrication of high-performance OPV devices through techniques such as inkjet printing and slot-die coating. The development of ink formulation frameworks based on solvent engineering, rheological and interface properties, and solubility parameters sets the base for standardized high-yield processes with reduced environmental footprint in line with circular carbon initiatives. Moreover, the utilization of engineering strategies involving intrinsic properties of materials, device architectures, and integration enables the development of complex energy harvesting and sensing devices for potential utilization in agrivoltaics and biosensing.

The layer-by-layer nature of additive manufacturing (AM) allows for access to the entire build volume of a component during manufacture including the internal structure. Voids are accessible during the build process and allow for components to be embedded and sealed with subsequently printed layers. This process, in conjunction with direct write (DW) of conductive materials, enables the direct manufacture of parts featuring embedded electronics, including interconnects and sensors. The scope of previous works in which DW and AM processes are combined has been limited to single material AM processes. The PolyJet process is assessed for hybridization with DW because of its multi-material capabilities. The PolyJet process is capable of simultaneously depositing different materials, including rigid and elastomeric photopolymers, which enables the design of flexible features such as membranes and joints. In this work, extrusion-based DW is integrated with PolyJet AM technology to explore opportunities for embedding conductive materials on rigid and elastomeric polymer substrates. Experiments are conducted to broaden the understanding of how silver-loaded conductive inks behave on PolyJet material surfaces. Traces of DuPont 5021 conductive ink as small as 750?m wide and 28?m tall are deposited on VeroWhite+ and TangoBlack+ PolyJet material using a Nordson EFD high-precision fluid dispenser. Heated drying at 55°C is found to accelerate material drying with no significant effect on the conductor's geometry or conductivity. Contact angles of the conductive ink on PolyJet substrates are measured and exhibit a hydrophilic interaction, indicating good adhesion. Encapsulation is found to negatively impact conductivity of directly written conductors when compared to traces deposited on the surface. Strain sensing components are designed to demonstrate potential and future applications. / Master of Science

A Tablet PC is a portable computing device which combines a regular notebook computer with a digitizing screen that interacts with a complementary electronic pen stylus. The pen allows the user to input data by writing on or by tapping the screen. Like a regular notebook computer, the user can also perform tasks using the mouse and keyboard. A Tablet PC gives the users all the features of a regular notebook computer along with the support to recognize, process, and store electronic/digital ink, enabling a user to make and save hand-written notes or data. In institutions of teaching and learning, instructors often use computer-based materials like web pages, PowerPoint® slides, etc., to explain subject matter. The ability to annotate on presentation information using the electronic stylus of a Tablet PC has attracted the attention of the academic community to use the Tablet PC as a potential tool for increasing the effectiveness of presentations in teaching and learning. Tablet PC-based applications such as OneNote®, WindowsJournal® and Classroom Presenter have been developed to enhance note-taking in classrooms based on the fact that a pen stylus is a more natural form of input device for making notes on the computer as compared to the regular keyboard and mouse. Although tools like OneNote®, WindowsJournal® enhanced the note-taking process on the Tablet PC, they lacked the ability to allow the user to directly annotate on the lecture content. Classroom Presenter provides the ability to integrate classroom notes and the presentation material by allowing the instructors and students to annotate over the lecture material. However, all the above tools lacked the ability to allow a user to take notes over the output window of an arbitrary application like Excel, an active simulator or a movies players output. The Tablet PC based tool, WriteOn, developed at Virginia Tech, addresses this drawback. WriteOn, when deployed on the Tablet PC in a classroom environment, allows the instructor to utilize electronic ink to annotate on top of any application window visible on the Tablet PC display screen, including those that play active content like a movie or simulation. WriteOn facilitates a user to annotate over a dynamic application window by activating its virtual transparency surface called the eVellum (electronic vellum). The user can view a movie or an active simulation running in the eVellum background because of its transparent color. The user can deactivate the eVellum to make it invisible by "piercing" it if he/she wishes to access the desktop or an application window under the vellum window. WriteOn provides the instructor with the ability to broadcast a composite of the dynamic lecture content and ink annotations to the students in real-time. The term dynamic lecture contents is meant to indicate that the content being annotated need not be static words on a background, but may also be window contents that are changing in time. Using WriteOn, the students can make their own notes by writing on the eVellum enabled on top of the lecture stream window without losing visibility of the lecture. The instructor/student can save the ink annotations along with base lecture material as a movie file. The ability of WriteOn to improve classroom presentation and student note-taking as shown by initial tests, were pedagogically very useful. However, in order to deploy WriteOn on large scale in classrooms as an active and effective teaching tool of choice, several aspects of the application had to be improved. One aspect of the application that needed improvement was the user interface. The primitive Graphical User Interface (GUI) of the WriteOn tool was not easily usable by instructors and students from non-computer science backgrounds. The second aspect needing improvement was the operational performance of the application in terms of its CPU resource utilization. The WriteOn tool has shown to have operational performance issues during the screen capture process. This research therefore aims to address improvements in the GUI to make it more user friendly and increase the operational performance to the point where the user does not notice degradation of a base lecture application. Incorporation of these improvements has led us to rename the application as WriteOn1.0. WriteOn1.0 implements a picture-based GUI that comprises of two forms: a main form that appears shortly after WriteOn1.0 starts and a toolbar. The WriteOn1.0 toolbar appears in the center of the top edge of the display as soon as the user initiates a task like a screen recording session, by clicking on the appropriate menu button on the main form. The toolbar provides the user, accessibility to perform all the desired activities like annotating, screen recording, presentation broadcast, and piercing of the eVellum by a single-click of the appropriate menu icon. Tool tips that appear when the user points the mouse over a picture icon on the toolbar, explain the task that shall be performed when he/she clicks on the underlying menu icon. WriteOn1.0 introduces a window-like resizable and movable eVellum called the scalable eVellum that it activates in the area of interest specified by the user. Unlike the first implementation of the eVellum which had a fixed location and spanned the entirety of the user's desktop window, the instructor/student define the dimensions of the scalable eVellum and can choose to re-dimension, relocate and pierce through it at any point of time during a session. WriteOn1.0 also introduces the transparent mode of operation wherein the instructor/student, without having to deactivate the scalable eVellum can access any underlying window by a right-click of the mouse on the eVellum surface while the ink annotations are intact on the foreground. WriteOn1.0 addresses the operational performance issues observed during a screen capture session in WriteOn by capturing the activities only in the area of interest of the user for recording and broadcasting. By combining this scheme with a with a lossless screen capture codec called the MSU screen capture codec that has a high-compression ratio and that is optimized for speed for data compression, WriteOn1.0 greatly improves the operational CPU performance of the tool. WriteOn1.0 employs various technologies to implement its features. The improvements to operational performance are implemented by using the MSU screen codec from Moscow State University's Graphics and Media Lab. Microsoft®'s Video for Windows Framework (VfW) and WindowsMedia Player API's are used to realize the module that records the screen activities to an AVI file while DirectShow of DirectX and ConferenceXP API's are used for streaming presentations over a network. WriteOn1.0, with its features like its scalable eVellum, good operational performance and picture-based GUI is aimed at potentially making it a teaching tool of choice across classrooms and changing the method of classroom instruction of courses involving dynamic content. / Master of Science

This thesis provides an introduction to an advance in technology-aided instruction. Most of the research in this area has focused on PowerPoint® based applications or white board-centered electronic ink applications with the capability of broadcasting slides, ink annotations and so forth, used for presentation or classroom lectures. But these tools lack the capability of annotating on any kind of applications with active content playing (a movie or a simulation, for instance) in the background. Additional useful, but currently unavailable functionality would include the capability of broadcasting the presentation information, which can further consist of lecture slides, ink annotations, video of the desktop screen activity, or any other application program that might be used to demonstrate a concept or illuminate an idea. Therefore, the current research attempts to provide these facilities with a new tool, WriteOn. WriteOn improves both the presentation of information and the interactivity in classroom instruction, because it gives the instructor the ability to ink annotate on any application by using a virtual transparency surface, called electronic vellum or simply eVellum, which in effect resides on top of all desktop window applications. The instructor can enable the vellum at any point during the lecture and write on it to draw diagrams, make notes, emphasize points, or otherwise elucidate the presentation content. The instructor can also pierce the eVellum in order to switch to different applications, modify an applications parameters or operating values, or otherwise manipulate an operating program as part of a classroom demonstration or discussion. These features allow the instructor to demonstrate the dynamic operation of any application, which is an improvement on a static PowerPoint display of a program's operation. With WriteOn, the instructor can save the ink annotations along with desktop screen activity over an interval of time as a movie file and later make this file available to students. Alternatively, the instructor can transmit to the students the presentation information along with ink annotations in real-time so that the students can make their own notes on top of information being produced by the instructor. Thus the tool can be used to enhance the interactive lecturing process and help students to develop good note-taking processes and habits. WriteOn is also capable of saving the voice of the instructor, provided there is an audio device attached to the instructor's Tablet PC. However, broadcasting the instructor's voice is not yet fully supported. The WriteOn tool was developed using Microsoft's technologies: Windows Media Encoder® and DirectShow of DirectX®, as well as Microsoft's ConferenceXP API to achieve streaming of the presentation information. The first chapter explains the need for computer tools used for effective teaching purposes. The second chapter presents the architectural and technical details of WriteOn. Chapter three describes the architecture of the WriteOn tool. Chapters four through six explain the major software components of the system and also give the pros and cons of the DirectShow and Windows Media Encoder technologies. The seventh chapter provides an explanation of the usage of the tool by instructors and students. The eighth chapter presents the experiences of the instructors and students using the WriteOn tool in the classroom and concludes with a discussion of future work in this area. The Appendix V provides a developers guide for those who might like to expand on this open source code. / Master of Science

Yes / Thermal ink-jet printing (TIJP) is shown to be a rapid (minutes) method with which to prepare pharmaceutical co-crystals; co-crystals were identified in all cases where the co-formers could be dissolved in water and/or water/ethanol solutions.

Yes / Tattooing has long been practised in various societies all around the world and is becoming increasingly common and widespread in the West. Tattoo ink suspensions unquestionably contain pigments composed of nanoparticles, i.e., particles of sub-100 nm dimensions. It is widely acknowledged that nanoparticles have higher levels of chemical activity than their larger particle equivalents. However, assessment of the toxicity of tattoo inks has been the subject of little research and ink manufacturers are not obliged to disclose the exact composition of their products. This study examines tattoo ink particles in two fundamental skin components at the nanometre level. We use atomic force microscopy and light microscopy to examine cryosections of tattooed skin, exploring the collagen fibril networks in the dermis that contain ink nanoparticles. Further, we culture fibroblasts in diluted tattoo ink to explore both the immediate impact of ink pigment on cell viability and also to observe the interaction between particles and the cells.

There is a constant search for new sustainable materials. A material that has become increasingly more interesting is cellulose, since it is both renewable and biodegradable. By combining cellulose nanofibrils (CNF) and the polymer complex poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), a conductive hydrogel can be made. The hydrogel can subsequently be used to 3D-print various structures, which further can be used in multiple applications such as microrobots, sensors and smart devices. The aim of this bachelor thesis was to develop a 3D-printable hydrogel composed of PEDOT:PSS and CNF was made. The goal was to print and crosslink a conductive structure, and subsequently induce electrical current through the structure to facilitate movement (i.e. artificial muscles). Several hydrogel inks composed of CNF and PEDOT:PSS were prepared across a range of concentrations. Homogenisation of the hydrogels was achieved through various mixing techniques. Both freeze-drying and evaporation were tested to concentrate the hydrogels. Furthermore, crosslinking tests were performed using iron(III)chloride hexahydrate and citric acid, followed by a conductivity measurement. Lastly, rheology tests were performed on four of the inks. The optimal concentration of solid material was determined to be 4.8 wt% and the most favourable way of concentrating the hydrogels was by freeze drying. Furthermore, iron(III)chloride hexahydrate was found to be more favourable when crosslinking the hydrogels. The conductivity measurements showed that crosslinking with iron(III)chloride hexahydrate resulted in a notable increase in conductivity in the material. Lastly, the rheology measurements showed that the 4.8 wt% hydrogel ink had high elasticity, viscosity and exhibited shear thinning behaviour. / Det söks konstant efter nya hållbara material. Ett material som har blivit alltmer intressant är cellulosa, eftersom det både är förnybart och bionedbrytbart. Genom att kombinera cellulosa nanofibriller (CNF) och polymer komplexet poly(3,4-etylendioxitiofen) polystyrensulfonat (PEDOT:PSS), kan en konduktiv hydrogel framställas. Denna hydrogel kan sedan användas för att 3D-printa en mängd olika strukturer, vilka senare kan används i olika tillämpningar så som mikrorobotar, sensorer och smarta enheter. Målet med detta kandidatarbete var att utveckla en hydrogel av PEDOT:PSS och CNF för användning i 3D-skrivare. Målet var att printa och korslänka en struktur med konduktiva egenskaper, vilken senare skulle induceras med elektricitet för att främja rörelse, med andra ord artificiella muskler. Ett flertal hydrogeler av CNF och PEDOT:PSS förbereddes i en rad olika koncentrationer. Homogenisering av hydrogelerna uppnåddes genom att testa olika metoder för omrörning. Både frystorkning och avdunstning testades för att koncentrera hydrogelerna. Dessutom undersöktes tvärbindning genom järn(III)kloridhexahydrat och citronsyra, följt av en konduktivitetsmätning. Slutligen utfördes reologimätningar på fyra av de framställda hydrogelerna. Den optimala koncentrationen av fast material i en hydrogel bestämdes till 4,8 vikt% och det mest gynnsamma sättet att koncentrera hydrogeler var genom frystorkning. Vidare, var järn(III)kloridhexahydrat ett mer fördelaktigt alternativ vad gällde tvärbindning av hydrogelerna. Konduktivitetsmätningarna visade att tvärbindning med hjälp av järn(III)kloridhexahydrat ökade konduktiviteten märkbart hos materialet. Slutligen visade reologimätningarna att hydrogelen med 4,8 vikt% hade hög elasticitet, viskositet och den uppvisade även skjuvningstunnande beteende.

劉健威. / 稿本 / 論文(碩士)--香港中文大學硏究院藝術學部,1992. / 附參考文獻 / Liu Jianwei. / 目錄 --- p.1 / 撮要 --- p.2 / 前言 --- p.3-7 / Chapter 第一章 --- 水墨畫運動的歴史背景 ´ؤ´ؤ香港藝壇與西方現代藝術的初接觸 --- p.1.3-1.13 / Chapter 第二章 --- 水墨畫觀念的完成 --- p.2.1-2.7 / Chapter 第三章 --- 水墨畫運動的完成和主流地位的確立 --- p.3.1-3.12 / Chapter 第四章 --- 由一畫會成立到水墨畫運動的完結 --- p.4.1-4.19 / Chapter 第五章 --- 香港當代水墨畫的一些繪畫模式 --- p.5.1-5.9 / Chapter 第六章 --- 總結 --- p.6.1-6.6 / 參考書目 / Chapter 一、 --- 中文參考書目 / Chapter 甲、 --- 展覽場刊目錄 --- p.7.1-7.4 / Chapter 乙、 --- 一般美術論著 --- p.7.5 / Chapter 二、 --- 英文參考書目 --- p.7.6 / Chapter 三、 --- 報章、期刊文章 --- p.7.7-7.9 / 附圖 --- p.7.10-7.12

廖桂英. / 論文(碩士) -- 香港中文大學硏究院藝術學部, 1996. / 參考文献 : leaves 52-57. / Liao Guiying. / 目錄 --- p.1 / 撮要 --- p.2 / 前言 --- p.3 / Chapter (一） --- 六七十年代香港水墨畫發展的歷史背景及槪況 --- p.4 / Chapter (二） --- 八十年代以後香港水墨畫的發展 --- p.11 / Chapter (三） --- 香港水墨畫的藝術特色 --- p.27 / Chapter (四） --- 香港水墨畫發展的隱憂 --- p.41 / Chapter (五） --- 總結 --- p.49 / 參考書目 / Chapter 一´Ø --- 中文參考書目 --- p.53 / Chapter 甲. --- 畫冊 --- p.53 / Chapter 乙´Ø --- 一般美術論著 --- p.54 / Chapter 二´Ø --- 英文參考書目 --- p.54 / Chapter 三´Ø --- 期刊、報章文章 --- p.55 / 附圖 --- p.58

2007年11月全球網路書局巨擘Amazon正式宣布進軍電子書事業，發表一款名為「Kindle」的電子書以及相關營運服務，旋即造成搶購風潮。 此電子書使用E-ink公司研發的電子墨顯示技術，讓使用者的使用彷彿覺得是閱讀印刷物，而電子墨技術已存在四十餘年，最早發明於Xerox Palo Alto Research Center，此技術以使用黑白的電子墨形成可反射環境光顯示方式，有別於主流使用於筆記型電腦或桌上監視器的彩色顯示器，電子書以採反射式，能在有環境照明時清晰可視，不須要一般顯示器的背光源，所以有較低的耗電，同時也可以有較輕與薄的設計。 此差異化的顯示技術與產品定位讓E-ink創新技術花費將近十年均只有極小衆的需求，直到2008年才見有起飛的成長。 本論文透過分析E-ink個案之創新技術擴散歷程，並佐證先前相關創新技術擴散理論之文獻，闡述擴散模式、影響因素、與創新採用過程來明瞭E-ink創新擴散的驅動力。 E-ink創新技術之應用與其他創新技術的最大差異，它不僅是個破壞式創新技術，它的應用是需要改變採用者使用方式。 此類的創新技術不像其他大多數的創新技術是新增使用方式或察覺不出使用方式須改變。 所以研究其技術擴散歷程可幫助我們明瞭此類較不易擴散的創新技術如何能加速其市場擴散。此研究同時比較應用E-ink電子墨顯示技術的電子書與其他新技術與產品市場擴散之差異，包括應用高密度積體電路記憶體設計與製造技術的數位音訊播放器(MP3 player)、應用薄膜電晶體液晶顯示器技術的大尺寸液晶平面電視與應用投射式電容觸控技術的平板電腦。 本研究我們發現，E-ink創新技術的應用驅動採用者改變其以往的使用方式，而此驅動力的來源就是使用創新技術的新產品價值主張。 在此個案中更進一步發現擴散模式的兩股驅動力可改變產品擴散市場的強度，首先是技術發展達到產品可滿足客戶最低的價值主張期望，第二是此價值主張讓使用者選擇此新技術帶來創新產品的需求滿足。 延伸觀察使用方式改變的擴散主要為兩個因素的函數，一為內部推動力- 包括新技術的技術發展力、供應力。另一為外部拉引力- 包括市場對產品價值主張的吸引力、其他創新技術使用的協同效果、銷售模式與經營模式對產品的推廣能力。 創新技術是一個高科技公司維持營運與成長的重要資產，但如何能將創新技術應用於產品成功的擴散市場，若能掌握重要的驅動因子，方可將此資產較快速地轉變為倍數的財源。 本研究分析改變使用方式的破壞性創新E-ink電子墨顯示技術的擴散模式，發現初期的擴散以內部技術力與供應能力驅動為主，建議企業在此時期應思考如何應用創新技術定位產品，同時定位於最核心的價值位置建立商業模式。 在此能力逐漸增強之後，其擴散則以外部市場吸引力驅動為主，必須在市場推出所謂「殺手級應用」產品，即應用此破壞性創新技術突顯差異的產品價值主張，而能跨越採用者鴻溝。 同時建議企業在此時應著力於產品開發策略，市場推出的產品必須滿足多層次採用者不同的需求，適當的規劃產品直到技術漸趨成熟而衰退。 / It has became one of the most popular consumer electronics since Amazon, the world leading bookstore, announced to enter eBook business and launched a reading device, called “Kindle” in November 2007. This eBook device applies a simple electronic ink display technology from E-ink and let readers to view the display just like to view a printed book. This electronic ink display have been developed more than 40 years and invented in Xerox Palo Alto Research Center. This technology applies dark and white electronic ink which could reflect ambient light to display black and white image on the screen. The display don't need a backlight as conventional LCD screens, and can also be viewed under sunlight as printed paper. In the same time, it has a less power consumption and could have a slim and light design for easy carry. But, it has spent more than 10 years to only gain a small population of customers to use this differentiating display and product which apply this E-ink innovative technology. After Amazon launched “Kindle” in late 2007, we observed this technology fast diffuse to the mass market. This thesis is to study a diffusion model of E-ink disruptive technology. Review prior articles of technology diffusion theory, model of innovation diffusion, factors of innovation diffusion and adoption of innovation to understand driving forces of E-ink technology diffusion. The major difference of E-ink technology from others is to require changing the user usage method when it appy to an electroic paper. It is not only a disruptive change, but requires changing user usage experience. Most of other new technologies are to add new or be easy usage, won’t feel a change of usage method and experience. Research the diffusion model of this disruptive technology help us to understand how we could expedite this type of new technology to the market. In this study, we also compare other similar applications of new technologies, such as MP3 player which apply high density of integrated circuit memory design and manufacturing; Large sized TFT LCD TV which using TFT LCD technology; and Tablet computer which adopt capacitive touch technology. To compare those technologies market diffusion with E-ink display technology. We have found the driving force to adopt E-ink technology and make change of user usage is the value proposition of products which adapt this innovative technology. Furthermore, we conclude two driving forces to enhance diffuse into mass market. First one is to meet the minimum expectations of the value proposition from this new technology. Second is to meet the needs of users who select this new technology. In addition to, it observed two important factors to change usage adoption, one is internal push force, and the other is external pull force. Internal push forces include technology development; and capability of supply chain. External pull forces include market attraction of product value propositions; synergy for using other technologies in the products; sales and business models to promote products. Innovative technology is an important asset to sustain company growth in a high- tech company. But how it could successfully apply the innovative technology to a product and diffuse into the market? It is important to know key driving forces, so this asset is able to turn into cash for continuous funding new innovation. This study analyzes the diffusion model of a disruptive E-ink display technology. We have found early diffusion forces are depended on technology and supply chain capability. It suggests company to focus how to initiate the product position with technology capability for meeting expectation of value proposition. In the mean time, it needs to build the supply chain infrastructure to position core value of new technology. Once company has built the technology capability, diffusion forces move to market pull. It starts to launch a “killer application” product to apply this technology and underline differentiating product value proposition, so it is able to cross the “chasm”. It also suggests company to adjust strategy on product development and requires having a broader product portfolio to meet a variety of customer needs. Finally, plan product development for mainstream applications utill technology is gradually slowdown.