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Thematische Bibliographien / Transfert de coloration

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Auswahl der wissenschaftlichen Literatur zum Thema „Transfert de coloration“

Autor: Grafiati

Veröffentlicht am 23. November 2024

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Zeitschriftenartikel zum Thema "Transfert de coloration"

1

Hanaishi, Ryuji, und Kazuhisa A. Chikita. „A Study on the Blue Coloration of Ao-ike Pond, Aomori Prefecture, Japan: Formulation of a Physical Model in Terms of Radiance and Image Analyses“. Applied Sciences 11, Nr. 19 (04.10.2021): 9231. http://dx.doi.org/10.3390/app11199231.

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The blue coloration model of a closed pond, Ao-ike Pond, Aomori Prefecture, Japan, was formulated in terms of radiance by applying a theory of observation devices proposed by Szirmay-Kalos (2008) and Hanaishi’s reverse ray tracing method. In this model, three potential contributions to the coloration were considered; irregular reflection at the Lambertian pond bottom, density fluctuation scattering by water, and Mie scattering by suspended solids. By utilizing model formulas for these mechanisms, some parameters were determined in order to duplicate the images of the pond surface without solar shading by tree leaves above the pond surface, in addition to the images with sunbeam trajectories by solar radiations passing through tree leaves, which are emitted from the water and visible on the surface. Simulating the pictures of the pond surface and the sun-beam-image analyses revealed that the blue colorations of Ao-ike Pond are mainly produced (1) by the density fluctuation scattering of water itself and the white Mie scattering by suspended solids and (2) by the red-light absorption by water in the optical paths before and after the two scatterings. Then, the density fluctuation scattering of water and the Mie scattering by suspended solids exhibited contributions of almost equal magnitude. The contribution of irregular reflections at the pond bottom was judged to be relatively small.

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2

Park, Hee Sung, Sunghyeok Park, Seung Han Song, Thuy Thi Dao, Hung Van Tran, Seok In Lee, Chi-Hwan Han, Churl Hee Cho und Sungjun Hong. „Effects of Ti-doping amount and annealing temperature on electrochromic performance of sol–gel derived WO₃“. RSC Advances 12, Nr. 27 (2022): 17401–9. http://dx.doi.org/10.1039/d2ra02247h.

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3

Zhi, Maoyong, Wanxia Huang, Qiwu Shi, Mingzhe Wang und Qibin Wang. „Sol–gel fabrication of WO3/RGO nanocomposite film with enhanced electrochromic performance“. RSC Advances 6, Nr. 72 (2016): 67488–94. http://dx.doi.org/10.1039/c6ra13947g.

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4

Deng, Yufei, Hua Li, Jian Liang, Jun Liao, Min Huang, Rui Chen, Yinggui Long, Jacques Robichaud und Yahia Djaoued. „Excellent Electrochromic Properties of Ti4+-Induced Nanowires V2O5 Films“. Materials 17, Nr. 19 (24.09.2024): 4680. http://dx.doi.org/10.3390/ma17194680.

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Ti4+-doped V2O5 films with nanowires on top and a dense, long nanorod layer on the bottom were successfully fabricated using the spin-coating route. During the electrochromic cycling, charge transfer resistance (Rct) decreases while ion-diffusion ability (KΩ) rapidly drops in the first ten cycles and then levels off. Low Rct and morphology of nanowires collaboratively improved the electrochromic behavior of Ti4+-doped V2O5 films by enhancing the charge transfer speed and minimizing polarization and dissolution. The obtained Ti4+-doped V2O5 film shows better electrochromic properties than the undoped V2O5 film, with a coloration efficiency (CE) of 34.15 cm2/C, coloration time of 9.00 s, and cyclic retention of 82.6% at cycle 100. In contrast, the corresponding values for the undoped V2O5 film were 23.57 cm2/C, 13.16 s, and 43.6%.

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Fujisawa, Jun-ichi, Natsumi Kikuchi und Minoru Hanaya. „Coloration of tyrosine by organic-semiconductor interfacial charge-transfer transitions“. Chemical Physics Letters 664 (November 2016): 178–83. http://dx.doi.org/10.1016/j.cplett.2016.10.007.

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6

Luna-Vivaldo, Irán, Ignacio Alejandro Pérez-Legaspi, María Isabel Jiménez-García, Luis Alfredo Ortega-Clemente und Ana Leticia Platas Pinos. „The coloration of Neocaridina davidi (Bouvier, 1904) (Caridea, Atydae) fed with live microalgae Haematococcus pluvialis and the cyanobacteria Spirulina (Arthrospira) platensis“. Latin American Journal of Aquatic Research 52, Nr. 2 (30.04.2024): 298–306. http://dx.doi.org/10.3856/vol52-issue2-fulltext-3000.

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Haematococcus pluvialis synthesizes and accumulates astaxanthins, while Spirulina (Arthrospira) platensis produces phycocyanins. The ornamental shrimp Neocaridina davidi is commercially important for its variety and intensity of coloration. We evaluate the effect on the coloration of N. davidi by consuming H. pluvialis and S. platensis as a food supplement to preserve their nutritional quality. H. pluvialis was subjected to stress to obtain aplanospores with astaxanthin. Live microalgae were included in gelled spheres to provide them as a supplement to three-day-old N. davidi juveniles with different phenotypes: wild (NdW), red (NdR), and blue (NdB). The experiment involved the commercial food supply and spheres with or without microalgae for 31 days. Chromatophores present in the uropod of each phenotype were examined, their number and expansion estimated, and the area covered by optical density (OD). Results show that H. pluvialis reached a greater astaxanthin accumulation on day 30. The coloration of the NdR and NdB phenotypes improved by consuming microalgae, increasing the OD in the uropod. NdB phenotype showed better coloration when consuming S. platensis (56.2%), while the NdR phenotype was more favored when consuming H. pluvialis (74.2%). The chromatophores expanded their area by doubling in the NdR and NdB phenotypes, where H. pluvialis increased its intensity four times in NdR. The number of chromatophores was significant only in NdR with S. platensis. In conclusion, gelling is a viable method to preserve the nutritional quality of live microalgae and transfer bioactive compounds that improve the coloration of N. davidi.

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Chang, Ning, Delong Wang, Bing Liu, Da He, Hong Wu und Xiangwei Zhao. „Stable Plasmonic Coloration of Versatile Surfaces via Colloidal Monolayer Transfer Printing“. Advanced Engineering Materials 21, Nr. 8 (27.06.2019): 1900313. http://dx.doi.org/10.1002/adem.201900313.

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8

Gu, Huiying, Xiaomeng Sun, Qian Zhao, Hongwei Wang, Xinfeng Cheng, Chunxia Yang und Dongfang Qiu. „Near-IR Electrochromic Film with High Optical Contrast and Stability Prepared by Oxidative Electropolymerization of Triphenylamine Modified Terpyridine Platinum(II) Chloride“. Molecules 28, Nr. 24 (09.12.2023): 8027. http://dx.doi.org/10.3390/molecules28248027.

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Terpyridine (TPY) platinum(II) chloride with a triphenylamine (TPA) group was successfully synthesized. The strong intramolecular Donor(TPA)-Acceptor(TPY) interaction induced the low-energy absorption band, mixing the spin-allowed singlet dπ(Pt)→π*(TPY) metal-to-ligand charge transfer (MLCT) with the chloride ligand-to-metal charge transfer (LMCT) and chloride ligand-to-ligand (TPY) charge transfer (LLCT) transitions, to bathochromically shift to λmax = 449 nm with significant enhancement and broadening effects. Using the cyclic voltammetry method, its oxidative electropolymerization (EP) films on working Pt disk and ITO electrodes were produced with tunable thickness and diffusion controlled redox behavior, which were characterized by the SEM, EDS, FT-IR, and AC impedance methods. Upon applying +1.4 V voltage, the sandwich-type electrochromic device (ECD) with ca. 290 nm thickness of the EP film exhibits a distinct color transformation from red (CIE coordinates: L = 50.75, a = 18.58, b = 5.69) to dark blue (CIE coordinates: L = 45.65, a = −1.35, b = −12.49). Good electrochromic (EC) parameters, such as a large optical contrast (ΔT%) of 78%, quick coloration and bleaching response times of 2.9 s and 1.1 s, high coloration and bleaching efficiencies of 278.0 and 390.5 C−1·cm2, and good cycling stability (maintains 70% of the initial ΔT% value after 3200 voltage switching cycles), were obtained.

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De Bortoli, Gian Marco, Karolina Prawda und Sebastian J. Schlecht. „Active Acoustics with a Phase Cancelling Modal Reverberator“. Journal of the Audio Engineering Society 72, Nr. 10 (16.10.2024): 705–15. http://dx.doi.org/10.17743/jaes.2022.0171.

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Active acoustics (AA) systems are used to electronically modify the acoustics of a room (e.g., in live music venues). AA systems have an inherent feedback component and can suffer from instability and coloration artifacts resulting from too high feedback gains. State-of-the-art methods can improve system stability and coloration, usually at the cost of complex implementations and long parameter-tuning sessions. They can also cause sound artifacts due to time-varying components, limiting the enhancement at low frequencies. This work proposes a time-invariant feedback attenuation method for low frequencies based on a modal reverberator. The attenuation is achieved through destructive acoustic interference, obtained via phase shifts between the input and output signals. The analyzed frequency range is 0–500 Hz, where the room transfer functions are considered highly invariant over time. The results show a gain-before-instability increase of more than 5 dB for a modal reverberator with high mode density in this frequency range. The improvement is also stable for low-magnitude changes in the room transfer functions over time. The proposed method provides a robust AA system with artificial reverberation for the low-frequency range and can be used alongside other established methods.

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Shin, Haijin, Seogjae Seo, Chihyun Park, Jongbeom Na, Minsu Han und Eunkyoung Kim. „Energy saving electrochromic windows from bistable low-HOMO level conjugated polymers“. Energy & Environmental Science 9, Nr. 1 (2016): 117–22. http://dx.doi.org/10.1039/c5ee03160e.

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Energy saving electrochromic windows were achieved by controlling the interfacial charge transfer using low-HOMO level (E_HOMO < −5 eV) π-conjugated polymers (CPs) as bistable electrochromic films and an ionic liquid as the electrolyte layer. It provided a long bistability (>90 min) at the voltage-off state with a high coloration efficiency (879 cm² C⁻¹).

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Dissertationen zum Thema "Transfert de coloration"

1

Lalanne, Jean. „Étude de l'influence des impuretés présentes dans les produits sucriers de canne ou de betterave sur le transfert de coloration au sein du cristal de saccharose“. Amiens, 1999. http://www.theses.fr/1999AMIE0119.

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Kuldova, Karia. „Photochromisme par transfert de proton : mécanismes réactionnels et stabilité des formes colorées“. Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10043.

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La reaction de la photocoloration du 2-dnbp (2-(2', 4'-dinitrobenzyl)pyridine) par transfert intramoleculaire de proton est etudiee en solution par spectroscopie d'absorption transitoire. Plusieurs approches pour stabiliser les tautomeres colores sont mises en uvre. La duree de vie de l'anion du 2-dnbp est augmentee en utilisant un cryptate comme accepteur de proton, alors que la forme coloree nh est stabilisee par modification du groupement accepteur de proton: addition de liaison hydrogene ou augmentation de la distance donneur-accepteur. Les formes colorees du 4-dnbp (4-(2', 4'-dinitrobenzyl)pyridine) et de trois nouveaux derives du 2-dnbp concus et synthetises pour cette etude ont leur duree de vie allongee, par rapport au 2-dnbp, d'un facteur pouvant aller jusqu'a 10#4. Une etude analogue mais plus restreinte a ete effectuee pour une deuxieme classe de molecules: des composes derives de l'anil de l'aldehyde salicylique, de l'aminophenyle et l'hydroxyphenyle benzimidazole et de l'aminophenyle benzoxazole. Le photochromisme par transfert de proton de certains d'entre eux a ete mis en evidence a partir de l'etude comparee de leurs spectres d'absorption et d'emission

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Loutete-Dangui, Edgar Davy. „Etude par ellipsométrie spectroscopique de transitions thermo-induites du premier ordre dans les solides bistables à transition de spin et analogues du bleu de Prusse“. Versailles-St Quentin en Yvelines, 2008. http://www.theses.fr/2008VERS0029.

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Nous avons mené des investigations par ellipsométrie stectroscopique des propriétés thermiques sur la pastille du composé à transition de spin [Fe(NH2-trz)3]Br2 présentant une transition de phase de premier ordre avec hystérésis, dans la gamme de température 263K-358K. Les spectres des angles ellipsométriques, (psi, delta) ont été obtenu dans la gamme de longueur d'onde 200nm-850nm. Les spectres d'absorption et de dispersion obtenus, présentent des points isobestiques localisés respectivement à 240nm et 291nm. La fraction-haut-spin en température a été déduite à partir des aires des courbes d'absorption, nous avons trouvé un excellent accord avec la fraction-haut-spin mesurée en magnétisme sur la même pastille. Nous avons vérifié la validité des données ellipsométriques, par application des relations de Kramers-Kronig qui ont été aisément vérifiées, notamment autour du pic de la bande à transfert de charge métal-ligand localisée à 290nm. Un travail similaire a été effectué sur un composé à transfert de charge, de type Jahn-Teller switch coopératifs (RbMnFe[(CN)6]) présentant une transition de phase structurale du 1er ordre de type Jahn-Teller switch coopératifs. Les spectres des parties réelles et imaginaires de la constante diélectrique ont été obtenu autour de la transition, dans la gamme de température 250K-350K. L'ensemble des résultats prouvent que l'aptitude de l'ellipsométrie à caractériser la transition de spin et la transition structurale de type jahn-teller. C'est une technique non destructive, adaptée à l'étude des couches minces des solides moléculaires commutables, dont les propriétés électroniques varient pendant la transition de phase
We investigated by means of spectroscopic ellipsometry the thermal and the optical properties of a pelleted sample of the spin-crossover compound [FE(NH2-trz)3]Br2 wich exhibits a first order phase transition with hysteresis, in the temperature range 263K-358K. The ellipsometric parameters (psi, delta) have been recorded in the optical range 200nm-850 nm. The corresponding absorption and dispersion spectra show temperature-invariant isobestic point located at 240nm and 290nm, respectively. We found that the high-spin-fraction data, derived from the integrated absorption curves, are in excellent agreement with the magnetic data recorded on the same sample. We also investigates the consistency of the optical data by application of the Kramers-Kronig relations, wich are the well obeyed notably around the peak of the metal-ligand charge-transfer band located at 290nm. The same study was also used on a pelleted sample of rubidium manganese hexacyano-d=ferrate (RbMn[Fe(CN)6]), wich exhibits a structural induced first-order phase transition. Optical spectra of the real and imaginary parts of the complex dielectric constant have been recorded in the whole relevant interval of temperature, i. E. 250K-350K around the transition. All these results demonstrate that the spectrometric ellipsometry is well adapted to characterize the spin-crossover transition and the Jahn-Teller phase transition. We also expect that this non-destructive technique will be highly relevant to investigate the physical properties of thin films of switchable molecular solids, involving a change in the electronic properties upon a thermally induced phase transition

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Omnès, Thierry J.-F. „Acropolis : un précompilateur de spécification pour l'exploration du transfert et du stockage des données en conception de systèmes embarqués à Haut Débit“. Paris, ENMP, 2001. http://www.theses.fr/2001ENMP0995.

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Nisar, Zeeshan. „Self-supervised learning in the presence of limited labelled data for digital histopathology“. Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAD016.

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Un défi majeur dans l'application de l'apprentissage profond à l'histopathologie réside dans la variation des colorations, à la fois inter et intra-coloration. Les modèles d'apprentissage profond entraînés sur une seule coloration (ou domaine) échouent souvent sur d'autres, même pour la même tâche (par exemple, la segmentation des glomérules rénaux). L'annotation de chaque coloration est coûteuse et chronophage, ce qui pousse les chercheurs à explorer des méthodes de transfert de coloration basées sur l'adaptation de domaine. Celles-ci visent à réaliser une segmentation multi-coloration en utilisant des annotations d'une seule coloration, mais sont limitées par l'introduction d'un décalage de domaine, réduisant ainsi les performances. La détection et la quantification de ce décalage sont essentielles. Cette thèse se concentre sur des méthodes non supervisées pour développer une métrique de détection du décalage et propose une approche de transfert de coloration pour le minimiser. Bien que ces algorithmes réduisent le besoin d'annotations, ils peuvent être limités pour certains tissus. Cette thèse propose donc une amélioration via l'auto-supervision
A key challenge in applying deep learning to histopathology is the variation in stainings, both inter and intra-stain. Deep learning models trained on one stain (or domain) often fail on others, even for the same task (e.g., kidney glomeruli segmentation). Labelling each stain is expensive and time-consuming, prompting researchers to explore domain adaptation based stain-transfer methods. These aim to perform multi-stain segmentation using labels from only one stain but are limited by the introduction of domain shift, reducing performance. Detecting and quantifying this domain shift is important. This thesis focuses on unsupervised methods to develop a metric for detecting domain shift and proposes a novel stain-transfer approach to minimise it. While multi-stain algorithms reduce the need for labels in target stains, they may struggle with tissue types lacking source-stain labels. To address this, the thesis focuses to improve multi-stain segmentation with less reliance on labelled data using self-supervision. While this thesis focused on kidney glomeruli segmentation, the proposed methods are designed to be applicable to other histopathology tasks and domains, including medical imaging and computer vision

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Buchteile zum Thema "Transfert de coloration"

1

Shiyanovskaya, Irina. „Isotopic Effect in Evolution of Structure and Optical Gap During Electrochromic Coloration of WO3·1/3(H2O) Films“. In Progress in Fourier Transform Spectroscopy, 819–22. Vienna: Springer Vienna, 1997. http://dx.doi.org/10.1007/978-3-7091-6840-0_218.

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2

Anowar Hossain, Md. „Evaluation of Camouflage Coloration of Polyamide-6,6 Fabric by Comparing Simultaneous Spectrum in Visible and Near-Infrared Region for Defense Applications“. In Colorimetry [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.101537.

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Polyamide-6,6 (PA-6,6) knitted fabric was coated with a complex combination of liquid-phase oxidized carbon black pigment (CBP) as light absorber and mono-sulfonated telon violet 3R (TVR) as acid dyes. Nitric acid (NA) moiety was used as liquid-phase oxidation of CBP and hydrophilic transformation of CBP-TVR. Thermoplastic polyurethane (TPU) and N, N-dimethylformamide (DMF) were formulated as cross-linker between composite mixture (CM) and PA-6,6 fabric. Six different CMs were coded for coating of PA-6, 6 fabric such as TPU-DMF, CBP-TPU-DMF, TVR-TPU-DMF, CBP-TVR-TPU-DMF, NA-TVR-TPU-DMF, NA-CBP-TVR-TPU-DMF. Structural, chromatic, and spectral reflection of CM coated PA-6,6 fabric was investigated by scanning electron microscopy, color measurement spectrophotometer, and Fourier transform infrared spectroscopy. CBP formulated PA-6,6 fabric was significantly remarked as maximum light absorber in both visible and near-infrared spectrum without allowing other parameters of treated PA-6,6 fabric. Therefore, minimum light reflection principle of CBP was indicated as camouflage material for camouflage textile coloration/finishing/patterning of simultaneous spectrum probe in visible and near-infrared spectrum. PA-6,6 fabric is very common fabrication for defense clothing, weapon, and vehicle netting against every combat background. This approach of simultaneous spectrum probe may be extended for concealment of target signature against high-performance defense surveillance.

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3

Keefer, Robert F. „Macronutrients—Phosphorus and Potassium“. In Handbook of Soils for Landscape Architects. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780195121025.003.0014.

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Plants have a P concentration between 0.03 and 0.70%, but the usual amount is between 0.1 and 0.4%. Phosphorus is found in every living cell of a plant and is involved in genetic transfer and energy relationships. The actively growing parts, that is, stem tips, new leaves, and new roots, need much P. Seeds, especially at maturity, also have a rich supply of P acting as reserve food. Phosphorus is used in plants for (a) root development—especially the lateral and fibrous roots; (b) cell division—energy for metabolism; (c) reproduction—flowering, fruiting, seed formation all controlled by nucleic acids; (d) maturation—counteracts the ill effects of excessive N fertilization; arid (e) disease resistance— especially important in root rots of seedlings. Plant P is a major constituent of chromosomes present as DNA (deoxyribonucleic acid) used in reproduction and RNA (ribonucleic acid) used in growth processes. Plant P is also a constituent of adenosine triphosphate (ATP) that stores energy for plant use, along with many other phosphate compounds, such as phytin (inositol hexaphosphate) stored in seeds, phospholipids in the chloroplasts, and complexes of sugars, sugar amines, aldehydes, amides, and acids—all involved in plant metabolism. Deficiency of P is not striking or characteristic and is difficult to diagnose. The older leaves may be dark bluish-green, bronze, or purple. The stalks are thin, leaves small, limited lateral growth, delayed maturity, and defoliate prematurely. Probably the most obvious symptom would be the purple coloration, but this is exhibited by only a limited number of plants. The best way to determine if a plant is deficient in P would be to conduct a plant tissue test. If the P level is lower than 0.2% P, then P probably is deficient and the soil in which the plant is growing would benefit from P fertilization. . . . Phosphorus Toxicity? . . . Phosphorus toxicity has not been observed in the field and has only been evident in greenhouse culture solutions when P was present at extremely high concentrations.

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Konferenzberichte zum Thema "Transfert de coloration"

1

Chang, Ning, Delong Wang, Bing Liu, Da He und Xiangwei Zhao. „Stable plasmonic coloration of versatile surfaces via colloidal monolayer transfer printing“. In Optics in Health Care and Biomedical Optics XII, herausgegeben von Qingming Luo, Xingde Li, Ying Gu und Dan Zhu. SPIE, 2023. http://dx.doi.org/10.1117/12.2643870.

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Burdis, Mark S., John R. Siddle und Shona Taylor. „Fourier transform infrared study of tungsten oxide thin films and their coloration by lithium“. In Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, herausgegeben von Volker Wittwer, Claes G. Granqvist und Carl M. Lampert. SPIE, 1994. http://dx.doi.org/10.1117/12.185380.

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Angeluts, A. A., Nikolai I. Koroteev, Sergei A. Krikunov, S. A. Magnitskii, D. V. Malakhov, V. V. Shubin und P. M. Potokov. „Enhancement of two-photon-initiated coloration by energy transfer from dye to photochromic molecules in polymer films“. In ICONO '98: Laser Spectroscopy and Optical Diagnostics--Novel Trends and Applications in Laser Chemistry, Biophysics, and Biomedicine, herausgegeben von Andrey Y. Chikishev, Victor N. Zadkov und Alexei M. Zheltikov. SPIE, 1999. http://dx.doi.org/10.1117/12.340017.

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Palke, Aaron, und George R. Rossman. „HEAT TREATMENT OF GEM QUALITY ANDRADITE (VAR. DEMANTOID): IS INTERVALENCE CHARGE TRANSFER NECESSARY FOR BROWN COLORATION IN ANDRADITE?“ In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-294617.

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Bollina, Ravi, Janet Landgraf, Hannes Wagner, Robert Wilhelm, Sven Knippscheer, Gerhard Mitic und Svetlana Levchuck. „Thermal Reliability and Environmental Testing of Advanced Metal Diamond Composites“. In ASME 2007 InterPACK Conference collocated with the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ipack2007-33028.

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Advanced diamond composites with matrix metal silver, copper and aluminum alloys were developed for heat sinks and base plates in high performance electronic packages. The reliability of these composites under extreme thermal and environmental conditions was investigated in the thermal cycling and pressure cooker tests. Thermal cycling tests on metal diamond composites were performed in a two chamber cycling oven between −55°C and +150°C for 1000 thermal cycles with 20 minutes storage time in each chamber. The effect of humidity and pressure was assessed from pressure cooker test at 121°C at 2 bar for 168 h. Thermal properties such as thermal diffusivity and specific heat were measured before and after the thermal cycling to observe any changes in thermal properties of the composites due to any possible interfacial degradation. The thermal properties of the composites did not decrease and the interfaces did not degrade after the thermal cycling tests in case of Ag-diamond composites. Al-diamond composites show a slight decrease of 5–8% in thermal diffusivity after thermal cycling. The thermal diffusivity of the Cu/Cr based diamond composite is unaltered before and after testing. The thermal diffusivity of Cu/Si diamond composites decreased by 43% at room temperature measured value. Al-diamond composites did not show any degradation during the pressure cooker tests although aluminum carbide is hygroscopic and deteriorates under moisture. Ag and Al-diamond composites survived the pressure cooker test. Cu/Si and Cu/Cr based diamond composites showed a slight change in coloration and a possible corrosion after the pressure cooker test.

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Soccolich, C. E., M. N. Islam und K. R. German. „Extended tuning range for a passively mode-locked NaCl color-center laser“. In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1990. http://dx.doi.org/10.1364/oam.1990.mb4.

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We have doubled the tuning range of a passively mode-locked NaCl color-center laser by introducing a low-loss intracavity frequency filter and properly preparing the NaCl gain crystal. By using a collection of bulk and multiple-quantum-well III–V saturable absorbers and II–VI quantum-well saturable absorbers, we obtained passive mode-locked operation over the wavelength range of 1.5–1.7 µm. To provide sufficient wavelength restriction without introducing excess bandwidth limiting or loss, we replaced the biréfringent plate of previous systems1 with a tunable frequency filter,2 formed by a pair of equilateral flint glass prisms (spaced 22 cm apart) and followed by a knife edge. We tune the laser by horizontal translation of the knife edge. The laser produces pedestal-free, near-transform-limited 280 fs pulses, which is the same pulse width obtained with birefringent plates. To obtain lasing at wavelengths shorter than 1.51 µm, the NaCl YAG crystal must be annealed to reduce scattering from presence of colloidal particles formed during coloration. With annealed crystals we obtain lasing at wavelengths as short as 1.38 µm, and laser power at 1.5 µm is only 30% below the maximum. In summary, we demonstrate a stable, single-cavity solidstate, subpicosecond pulse source of 1.5–1.7 µm.

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