Display omitted
•A low-cost surface plasmon resonance refractive index sensor based on DVD-ROM has been studied.•Wavelength modulation is used to detect different concentrations of NaCl solution, and ...the sensitivity is 540 nm/RIU.•Angular modulation is also used to detect NaCl solution, and the sensitivity is 32.4 degree/RIU.•FDTD simulation results are in good agreement with the experimental results.
In this paper, a low-cost surface plasmon resonance refractive index sensor based on DVD-ROM is introduced. There is a special grating structure in DVD-ROM, which can be used to excite SPR effect. We have measured the optimal resonance angle of the grating with deionized water at 28°. Wavelength modulation and angle modulation are used to detect different concentrations of sodium chloride solution. The results show that the sensitivities of the two modulation methods are 540 nm/RIU and 32.4 degree/RIU, respectively. Furthermore, we use finite difference time domain method to simulate the two methods separately. The sensitivities are 514 nm/RIU and 30.8 degree/RIU, respectively. The simulation results are in good agreement with the experimental results. Using this method to prepare the detection substrate can greatly reduce the production cost of SPR sensors.
A plug-and-play CD-like platform is used to perform a statistical detection of platelet derived growth factor (PDGF) proteins through aptamer-based surface functionalization of multiple ...microcantilever arrays. When PDGF proteins bind to aptamer coatings, the cantilevers deflect. The deflection response is monitored by optical read-out units from a commercial DVD-ROM device. We report on the use of an improved sensing platform which facilitates measurements under continuous liquid flow and with temperature control. Also, the mechanical wobbling of the DVD-ROM platform has been minimized and the scanning system has been optimized in order to detect cantilever deflections in liquid with nanometer scale resolution. The capability of the sensing platform is demonstrated by detection of clinically relevant concentrations of PDGF proteins. We present statistical measurements on 100 microcantilevers at different concentrations of PDGF, ranging from 10nM to 400nM. Hereby it is possible to reliably characterize the averaged mechanical response of cantilevers as a function of protein concentration.
The need for miniaturized and sensitive sensors for explosives detection is increasing in areas such as security and demining. Micrometer sized cantilevers are often used for label-free detection, ...and have previously been reported to be able to detect explosives. However, only a few measurements from 1 to 2 cantilevers have been reported, without any information on repeatability and reliability of the presented data. In explosive detection high reliability is needed and thus a statistical measurement approach needs to be developed and implemented. We have developed a DVD-based read-out system capable of generating large sets of cantilever data for vapor and liquid phase detection of 2,4-dinitrotoluene (DNT). Gold coated cantilevers are initially functionalized with tetraTTF-calix4pyrrole molecules, specifically designed to bind nitro-aromatic compounds. The selective binding of DNT molecules on the chemically treated surfaces results in significant bending of the cantilevers and in a decrease of their resonant frequencies. We present averaged measurements obtained from up to 72 cantilevers being simultaneously exposed to the same sample. Compared to integrated reference cantilevers with non-selective coatings the tetraTTF-calix4pyrrole functionalized cantilevers reveal a uniform and reproducible behavior.
The information provided by labels is called diasystematic information, which gives restrictions and limitations concerning the use of a lexical item. The focus of the study, the findings of which ...are presented in this contribution, is five British monolingual learner's dictionaries (OALD9, LDOCE6, COBUILD7, CALD4, MED2), which are often referred to as the "Big Five". The aims of the study are to compare the print edition and the electronic versions (CD-ROM/DVD-ROM and online dictionaries) of the same dictionary to see whether the lists of labels used in one particular dictionary coincide across versions of one and the same dictionary. Parallels are then drawn between dictionaries to determine similarities and differences in the use of labels providing different types of diasystematic information. Some of the most important findings of the study are that lists of labels differ in all three versions of one and the same dictionary and that some labels enumerated in the lists either are not used in the A-Z section at all or are used in a different form. Apart from that, some labels used in the dictionaries are so close in interpretation that the intended user will probably experience difficulty in distinguishing between them. Diasistematiese inligting in die "Groot Vyf" : 'n vergelyking van gedrukte woordeboeke, CD-ROMS/DVD-ROMS en aanlyn woordeboeke. Die inligting wat deur etikette verskaf word, word diasistematiese inligting genoem. Dit dui die beperkings en begrensings rakende die gebruik van 'n leksikale item aan. In die studie, waarvan die bevindings in hierdie bydrae aangebied word, word gefokus op vyf Britse eentalige aanleerderswoordeboeke (OALD9, LDOCE6, COBUILD7, CALD4, MED2) wat dikwels die "Groot Vyf" genoem word. Die doel van die studie is om die gedrukte uitgawe en die elektroniese weergawes (CD-ROM/DVD-ROM en aanlyn woordeboeke) daarvan te vergelyk om vas te stel of die lyste etikette wat gebruik word in een spesifieke woordeboek ooreenstem met ander weergawes van dieselfde woordeboek. Parallelle word dan tussen woordeboeke getrek om ooreenkomste en verskille te bepaal in die gebruik van etikette wat verskillende soorte diasistematiese inligting verskaf. Van die belangrikste bevindings van die studie is dat lyste etikette in al drie weergawes van dieselfde woordeboek verskil en dat sommige etikette wat in die lyste genoem word, glad nie in die A-Z-afdeling gebruik word nie of in 'n ander vorm gebruik word. Afgesien hiervan, kan sommige etikette wat in die woordeboeke gebruik word, so eenders geïnterpreteer word dat die gebruiker vir wie die woordeboek bedoel is, waarskynlik probleme sal ervaar om tussen die etikette te onderskei.
Writing matters, and so does research into real-life writing. The shift from an industrial to an information society has increased the importance of writing and text production in education, in ...everyday life and in more and more professions in the fields of economics and politics, science and technology, culture and media. Through writing, we build up organizations and social networks, develop projects, inform colleagues and customers, and generate the basis for decisions. The quality of writing is decisive for social resonance and professional success. This ubiquitous real-life writing is what the present handbook is about. The de Gruyter Handbook of Writing and Text Production brings together and systematizes state-of-the-art research. The volume contains five sections, focussing on (I) the theory and methodology of writing and text production research, as well as on problem-oriented and problem-solving approaches related to (II) authors, (III) modes and media, (IV) genres, and (V) domains of writing and text production. Throughout the 21 chapters, exemplary research projects illustrate the theoretical perspectives from globally relevant research spaces and traditions. Both established and future scholars can benefit from the handbook's fresh approach to writing in the context of multimodal, multi-semiotic text production.
This unique book presents a series of concisely written technical notes on common procedures in surgical oncology. Each operation is illustrated with pictures framing precise technical points. The ...book is accompanied by a DVD-ROM that includes video clips of the procedures.
DVD Car Navigation Yamauchi, Keiichi
The Journal of The Institute of Image Information and Television Engineers,
2002/04/01, Letnik:
56, Številka:
4
Journal Article
PDF
