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Literatura académica sobre el tema "Lader"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 11 de febrero de 2022

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Artículos de revistas sobre el tema "Lader"

MARJOT, DAVID. "COMMENT ON LADER (2011)". Addiction 107, n.º 3 (8 de febrero de 2012): 684. http://dx.doi.org/10.1111/j.1360-0443.2011.03743.x.

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Stolerman, Ian, Alyson Bond, Martin Jarvis y H. Valerie Curran. "Obituary: Professor Malcolm Lader". Psychopharmacology 237, n.º 12 (21 de octubre de 2020): 3509–10. http://dx.doi.org/10.1007/s00213-020-05674-x.

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Lehmann, Kai y Ulrich Stubbemann. "Aspekte der Entwicklung mechanischer Lader". MTZ - Motortechnische Zeitschrift 62, n.º 11 (noviembre de 2001): 916–22. http://dx.doi.org/10.1007/bf03227095.

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Kuroishi, Kenji, Tatuo Siina, Keizo Saitoh y Kouichi Ikeda. "Scattering of the laser beam traversing in fog and laser lader equation". JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN 77, Appendix (1993): 173–74. http://dx.doi.org/10.2150/jieij1980.77.appendix_173.

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Kwakernaak, Ralf, Mathias Matz y Frank Seifert. "DAF-Rennmotor mit Doppel-VTG-Lader". MTZ - Motortechnische Zeitschrift 61, n.º 11 (noviembre de 2000): 778–80. http://dx.doi.org/10.1007/bf03227314.

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Wangge, Yuliani Sepe y Nining Sariyyah. "Permainan Ular Tangga Berbasis Cerita Rakyat Ende-Lio untuk Meningkatkan Kosakata Bahasa Inggris". JURNAL PENDIDIKAN DASAR NUSANTARA 4, n.º 2 (14 de junio de 2019): 164. http://dx.doi.org/10.29407/jpdn.v4i2.12517.

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the purpose of this research is to improve English Vocabulary through Ende Lio folklore based snake ladder games. This research is a classroom action research through the stages of planning, action, observation and reflection. After applying the snake lader games based on folklore Ende Lio in two cycles, it was found that there was an increase in English vocabulary at PGSD students at Flores University

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Albertsen, Andreas. "Lader held-egalitarismen fanden tage de uansvarlige sidste?" Politica 45, n.º 2 (1 de enero de 2013): 217–32. http://dx.doi.org/10.7146/politica.v45i2.69780.

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Christensen, Ove. "Semiotekst". Slagmark - Tidsskrift for idéhistorie, n.º 19 (3 de febrero de 2018): 45–58. http://dx.doi.org/10.7146/sl.v0i19.103681.

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Der findes en lang tradition for at søge det hemmelige bag det åbenbare. Hvis noget fremgår 'uden videre', må det skyldes, at det gemmer på en dybere mening, som kun gennem det skarpsindige blik lader sig afsløre.

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Georgievna, Popova. "The Serbian manuscripts of the lader of divine ascent of St. John Sinaites (14th c.)". Prilozi za knjizevnost, jezik, istoriju i folklor, n.º 82 (2016): 19–36. http://dx.doi.org/10.2298/pkjif1682019g.

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The Ladder of Divine Ascent of St. John Sinaites has been very popular among the Slaves in the Middle Ages. From the 14th century 66 manuscripts were kept, 29 of them are Serbian. Not less than seven ancient manuscripts are kept in the National Library of Serbia (in the collections of the monasteries of Decani and Pec and in the New collection). Two manuscripts are kept in the library of the University of Belgrade, in the collection of manuscripts Lesnovo monastery. Five Serbian manuscripts of the Ladder are kept in the Russian National Library (St. Petersburg). Three ancient Serbian books of the Ladder are kept in Moscow, in the Russian State Library. Six ancient Serbian manuscripts of the Ladder are kept in the libraries of Mount Athos: four in the Hilandar monastery and two in the Zograf monastery. Four manuscripts of the Serbian Ladder are kept in Bucharest, in the Library of the Romanian Academy of Sciences. One ancient manuscript is kept in Macedonia, in the Ohrid National Museum. One Serbian book of the Ladder is kept in Paris, in the Slavic Fund of the French National Library. Of course, the former number of ancient Serbian manuscripts of the Ladder was much more than 29. The Serbian manuscripts preserved all ancient Slavonic translations of the Ladder: Preslav (in two versions), Tarnovo, Serbian (in two versions) and Athos. The author gives a description of each manuscript, names its location, dating and the related manuscripts. The Ladder as a book has many components. The basics of this book are the Life of St. John Sinaites and his message to John of Raif and 30 homilies. In the Slavic tradition we added a lot of new texts to this, not Greek but Slavic. One of these texts is the dictionary ?Tolkovanie recem?. According to our observations, this dictionary appeared in the Serbian book culture not later than the second half of the 14th century. The text of this dictionary began to appear separately from the Ladder very early as a part of the ascetic Sammelbands. An example is a Sammelband of the library of the Hilandar Monastery, number 455. The text of this dictionary is in the appendix of the article.

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Albinus, Lars. "Religion, magt og kommunikation". Religionsvidenskabeligt Tidsskrift, n.º 57 (30 de mayo de 2012): 20. http://dx.doi.org/10.7146/rt.v0i57.6403.

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Indledningsforelæsningen præsenterer hovedsynspunkterne i doktorafhandlingen Religion, magt og kommunikation. Filosofiske overvejelser over religionens betydning i moderniteten, set i krydsfeltet mellem Foucault og Habermas. Ud fra den tese, at kommunikation ikke lader sig tænke i et magt-tomrum, og at magt ikke (til forskel fra vold) lader sig tænke uden et mindstemål er kommunikativ indforståelse, undersøges religion som et socialt fænomen i moderniteten. Med udgangspunkt i den såkaldte Foucault-Habermas debat foretages en begrebsopbygning af ‘kommunikation’ og ‘magt’, der leder frem til et kritisk krydsfelt, hvor Foucault og Habermas kommer til at udgøre en slags korrektiver til hinanden. I forhold til religionen forsøger jeg imidlertid at udnytte et vist sammenfald i deres syn på æstetisk sensibilitet inden for rammerne af en eftermetafysisk tænkning. Jeg konkluderer, at den kommunikative rationalitet når sin grænse i religiøse og æstetiske tilværelsestolkninger, som man altid må forholde sig til på en ny tids betingelser. På den anden side må en kommunikativ fornuftsappel danne værn imod, at den sensibilitet og indignation, der bl.a. kommer til udtryk i en kritik af magt, ikke selv ender i en eskalation af magt.

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Tesis sobre el tema "Lader"

OLIVEIRA, MYRIAN COE DE. "A STUDY OF THE SENSITIVITY OF THE LATTICE-LADER STRUCTURE USING STATE VARIABLES". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1991. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9394@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
Na construção de filtros digitais os coeficientes da sua função de transferência, calculados teoricamente, nem sempre podem ser implementados com exatidão. Isto gera o erro de quantização. A análise de sensibilidade permite conhecer tal alteração das especificações teóricas como também avaliar o desempenho do filtro. Este trabalho examina a estrutura Lattice-Ladder, tipo de filtro digital, descrita por equações de estado genéricas. O objetivo é estabelecer expressões de sensibilidade nos domínios do tempo e da freqüência, para resposta impulsional e resposta a uma excitação qualquer.
In the construction of digital filters the coeficientes of its transfer function, calculated theorically, can´t often be implemented with accuracy. This leads to the quantization error. The sensitivy analysis allows to know this deviation from theoretical specifications and allows to estimate filter´s performance. This work examines Lattice- Ladder structure, a type of digital filter, described by generic state equations. The purpose is to establish sensivity expressions in time and frequency domains, for impulse and generic responses.

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Hilaire, Pierre. "Improved laser vibration ladar". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA359857.

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Thesis (M.S. in Applied Physics) Naval Postgraduate School, December 1998.
"December 1998." Thesis advisor(s): Robert C. Harney, Donald L. Walters. Includes bibliographical references (p. 43). Also available online.

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Dulgergil, Ebru. "Development Of A Pulsed Fiber Laser For Ladar System". Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614635/index.pdf.

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In recent years laser technology has increasingly developed with the use of fiber lasers and this has provided the possibility to implement different techniques in the defense industry. LADAR is at the forefront of these techniques. Fiber lasers constitute a perfect source for LADAR systems due to their excellent robustness, compact size and high-power generation capability. In this study we will explore the development of a pulsed fiber laser source for a LADAR system that can obtain high resolution 3D images in eye-safe region. A high power, all fiber integrated erbium system with strictly single mode operation in eye-safe region based on MOPA (master oscillator power amplifier) configuration with seed source and amplifier part was developed. Both the use of an actively mode locked laser with erbium doped fiber and fiber coupled modulated distributed feedback diode laser were investigated as seed sources for the amplifier part. Both erbium doped single clad fiber and erbium-ytterbium doped double clad gain fiber were used in this amplifier system. After amplification of the actively mode locked laser, 12 W of average optical power was obtained through single mode fiber with 1ns pulse duration at 10 MHz which corresponds to 1.2 kW peak power. For the fiber coupled DFB diode laser, 9.5W average power was obtained with around 8 ns duration pulses at 100 kHz and about 9.2 W average power was also obtained with around 700 ps duration pulses at 1 MHz through strictly single mode fiber at the output of the same amplifier system as was used in the actively mode locked seed source. In both cases calculated peak power was around 10 kW v which is estimated as the highest peak power for an all fiber integrated system with single mode operation. The development of such a fiber system with high power capability, compact size and free of misalignment is expected to be useful for LADAR application as well as other areas such as eye surgery, 3D silicon processing or any other material processing applications.

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Dunmeyer, David Richard 1978. "Laser speckle modeling for three-dimensional metrology and LADAR". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/16763.

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Thesis (M.Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
Includes bibliographical references (leaves 103-111).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
In this thesis, I developed three-dimensional laser-speckle models to help in the development process of three-dimensional optical-metrology imaging systems. These models were developed to aid in the proof of concept for various three-dimensional metrology techniques. These models were then compared to real-world imaging systems, developed by both the author and other staff at the MIT Lincoln Laboratory, to determine their ability to accurately model said imaging systems. I also looked at the laser speckle statistics associated with mid-field systems in an exo-atmospheric environment as they relate to LADAR.
by David Richard Dunmeyer.
M.Eng.and S.B.

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Lécz, Zsolt. "Laser ion acceleration from a double-layer metal foil". Phd thesis, TU Darmstadt, 2013. https://tuprints.ulb.tu-darmstadt.de/3335/1/PHD_final.pdf.

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The laser-ion acceleration with ultra-intense and ultra-short laser pulses has opened a new field of accelerator physics over the last decade. Fast development in laser systems are capable of delivering short pulses of a duration of a few hundred femtoseconds at intensities between 10^18-10^20 W/cm2. At these high intensities the laser-matter interaction induces strong charge separation, which leads to electric fields exceeding the acceleration gradients of conventional devices by 6 orders of magnitude. The particle dynamics and energy absorption of the laser pulse can be understood by means of high-performance simulation tools. In the framework of the LIGHT (Laser Ion Generation, Handling and Transport) project our goal is to provide an analytical description of the 3D distribution of the protons accelerated via TNSA (Target Normal Sheath Acceleration). In this acceleration mechanism the short pulse impinging on a metal foil heats the electrons to relativistic energies, which triggers the strong charge separation field on the opposite target surface (Debye-sheath). The accelerated light ions (proton, carbon, oxygen) observed in the experiments originate from the contamination layer deposited on the surface. The thickness of this layer in the experiments is not known exactly. According to our study these ions can be accelerated in three different regimes depending on layer thickness: quasi-static acceleration (QSA, for thin layers), plasma expansion (for thick layers) and a not well understood intermediate (or combined) regime. In a laser-plasma simulations time-dependent hot electron density and temperature are observed, therefore we performed plasma simulations with a well defined and constant initial hot electron distribution. Thus the simulation results are easier to compare with analytical models. In our case the theoretical investigation of the TNSA involves the understanding of the charge separation effects at the surface of a two-temperature plasma and the consequent proton acceleration in one dimension. We omit the detailed dynamics of the laser-plasma interaction by assuming a preheated electron distribution. With our 1D electrostatic simulations we investigate the influence of the proton layer thickness on the TNSA energy spectrum. Additionally we investigate the divergence of the protons using 2D simulations: In these we simulate the heating of the electrons by the laser pulse. Numerical studies in this work were carried out using a Particle-in-Cell (PIC) plasma simulation code (VORPAL). The target is defined as a single-ionized plasma with a doublelayer structure: a bulk layer of heavy ions, which represents the metal foil itself and a much thinner proton layer, which serves as the contamination layer. The layer is considered thin if it is thinner compared to the skin depth of the accelerating electric field. For a thin proton layer the quasi-static acceleration is the governing mechanism. When the proton layer is larger than skin depth the process can be described as plasma expansion. I found that the energy and phase-space distribution of the protons strongly depends on the layer thickness. In the QSA regime the proton spectrum shows a nearly monoenergetic feature, but the maximum energy is typically low compared to the plasma expansion regime, where the protons have a broad exponential energy spectrum. For the plasma expansion we observe a cut-off energy that logarithmically depends on the acceleration time. The simulation results in these two extreme cases for one- and two-temperature plasmas have been extensively compared to analytical predictions showing an overall good agreement. In the intermediate regime an analytical expression could be obtained for the energy conversion from electrons to protons as a function of electron parameters and layer thickness. By changing the layer thickness a smooth transition between the two extreme cases could be identified. The proton layer thickness also has an impact on the transversal acceleration, which defines the divergence of a proton beam. In the two-dimensional TNSA simulations a laser pulse is needed to generate the hot electron population in the plasma. The simulations show that theoretically with the right laser pulse duration and layer thickness the divergence of the most energetic protons can be reduced almost to zero. In the QSA regime the transversal distribution and temperature of the hot electrons changes too quickly compared to the time-scale of the acceleration. The analytical treatment of the divergence is only possible for the thick layers, where the plasma expansion model is suitable to describe the physics. The model derived in this work can be used to reconstruct the whole velocity phase-space of the protons in 3D. Therefore it enables us to perform particle tracking and beam optics simulations with realistic TSNA proton bunch. The envelope angle of the protons measured in experiments can be also reproduced using our 2D model. The beam quality during motion through magnetic focusing and energy selection systems downstream of the laser acceleration is sensitive to the initial distribution. After benchmarking our analytic models, simulation results and measurements with each another, we are confident we can now provide sufficiently realistic particle distributions to be expected a few mm from the target in TNSA. Using our particle distributions as input, the effect of co-moving electrons, the degradation of the transverse emittance and chromatic aberration effects can be investigated. Thereby this study hopefully contributes to the goal of the Light project: Coupling the new laser ion acceleration techniques to conventional accelerator facilities.

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Lutey, Adrian Hugh Alexander <1986&gt. "High-Speed Laser Processing of Thin Single and Multi-Layer Films". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amsdottorato.unibo.it/5741/.

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Theoretical models are developed for the continuous-wave and pulsed laser incision and cut of thin single and multi-layer films. A one-dimensional steady-state model establishes the theoretical foundations of the problem by combining a power-balance integral with heat flow in the direction of laser motion. In this approach, classical modelling methods for laser processing are extended by introducing multi-layer optical absorption and thermal properties. The calculation domain is consequently divided in correspondence with the progressive removal of individual layers. A second, time-domain numerical model for the short-pulse laser ablation of metals accounts for changes in optical and thermal properties during a single laser pulse. With sufficient fluence, the target surface is heated towards its critical temperature and homogeneous boiling or "phase explosion" takes place. Improvements are seen over previous works with the more accurate calculation of optical absorption and shielding of the incident beam by the ablation products. A third, general time-domain numerical laser processing model combines ablation depth and energy absorption data from the short-pulse model with two-dimensional heat flow in an arbitrary multi-layer structure. Layer removal is the result of both progressive short-pulse ablation and classical vaporisation due to long-term heating of the sample. At low velocity, pulsed laser exposure of multi-layer films comprising aluminium-plastic and aluminium-paper are found to be characterised by short-pulse ablation of the metallic layer and vaporisation or degradation of the others due to thermal conduction from the former. At high velocity, all layers of the two films are ultimately removed by vaporisation or degradation as the average beam power is increased to achieve a complete cut. The transition velocity between the two characteristic removal types is shown to be a function of the pulse repetition rate. An experimental investigation validates the simulation results and provides new laser processing data for some typical packaging materials.

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Seixas, Fabio Heredia. "Avaliação do uso do laser de Er: YAG sobre a remoção da camada de 'smear' das paredes dos canais radiculares com achatamento mésio-distal submetidos à instrumentação rotatória". Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/58/58133/tde-19022004-120106/.

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No tratamento endodôntico, várias fases de igual importância são necessárias para a realização de uma terapêutica bem sucedida, entre elas podemos citar a instrumentação. Apesar de todas as técnicas e instrumentos propostos para a Endodontia, o sucesso esperado ainda não foi alcançado. Tanto a instrumentação manual quanto à rotatória não resulta na limpeza das áreas polares dos canais radiculares com achatamento mésio-distal. No intuito de obter melhor resultado clínico, avaliou-se in vitro a remoção da camada de smear das paredes dos canais radiculares de 40 dentes incisivos inferiores portadores de achatamento mésio-distal submetidos à instrumentação rotatória por meio da técnica Free Tip Preparation, utilizando o laser de Er: YAG nos parâmetros de 140 e 250 mJ. Para tanto, a fibra óptica do aparelho foi deslocada lentamente, com velocidade de 2 mm/s, até o orifício cervical na câmara pulpar, na parede vestibular e lingual da raiz; e sua eficácia na remoção da smear foi comparada aos grupos onde se utilizou apenas Hipoclorito a 2,5% e Hipoclorito de sódio a 2,5% alternado com EDTA a 17%. Os dentes foram analisados por meio de microscopia eletrônica de varredura, e as fotomicrografias das áreas mais representativas dos terços médio e apical foram avaliadas por três examinadores diferentes, com grau mínimo de Mestre, que observaram a quantidade da camada de smear presente nas amostras em relação a três padrões. Os examinadores, sem que tivessem o conhecimento prévio de qual dos grupos estavam avaliando, atribuíram escores de 1 a 4 as fotomicrografias, de acordo com a quantidade da camada de smear visualizada. Os dados obtidos foram submetidos à análise estatística não-paramétrica, comparando-se os diferentes grupos estudados (teste de Kruskal-Wallis) e os terços radiculares (teste de Wilcoxcon). Os resultados mostraram que, quanto à quantidade da smear encontrada nos grupos estudados, o grupo que utilizou Hipoclorito a 2,5% alternado com EDTA apresentou os canais radiculares mais limpos seguido do grupo do laser 250 mJ e posteriormente pelos grupos do laser Er: YAG a 140 mJ e do hipoclorito a 2,5%, que não apresentaram diferença estatisticamente significante entre si. Quanto aos terços, o apical apresentou maior quantidade da smear em comparação com o terço médio (p< 0,01).
Manual or rotary instrumentation techniques do not efficiently clean mesio-distal flattened root canals. This study evaluated, in vitro, smear layer removal of 40 mesio-distal flattened root canals after rotary instrumentation. The teeth were then divided into 4 groups: group 1: rotary instrumentation and 2.5% sodium hypochlorite used as irrigating solution; group 2: instrumented as group 1 and followed by Er: YAG laser irradiation (140mJ input/10Hz), withdrawn at 2mm/s from the apical to the cervical region touching the buccal walls the procedure was then repeated for the lingual wall); group 3: instrumented as group 1 and followed by Er: YAG laser irradiation (250mJinput/10Hz) withdrawn at 2mm/s from the apical to the cervical region touching the buccal walls the procedure was then repeated for the lingual wall) and group 4: instrumented as group 1 and alternated with 17% EDTA Teeth were split longitudinally and prepared for examination under scanning electron microscopy. Scores from 1 to 4 were given to the fotomicrographs by three independent evaluators, and these data was submitted to statistical analysis. The teeth where alternated 17% EDTA were used (group 4) showed less amount of smear layer, followed by the group irradiated with 250mJinput/10Hz (group 3), the group irradiated with 140mJ input/10Hz and the group where only sodium hypochlorite was used. The apical third presented more smear layer than the middle third (p<00.1).

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Campos, Zatarain Alberto. "Diode laser modules based on laser-machined, multi-layer ceramic substrates with integrated water cooling and micro-optics". Thesis, Heriot-Watt University, 2012. http://hdl.handle.net/10399/2595.

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This thesis presents a study on the use of low temperature co-fired ceramic (LTCC) material as a new platform for the packaging of multiple broad area single emitter diode lasers. This will address the recent trend in the laser industry of combining multiple laser diodes in a common package to reach the beam brightness and power required for pumping fibre lasers and for direct-diode industrial applications, such as welding, cutting, and etching. Packages based on multiple single emitters offer advantages over those derived from monolithic diode bars such as higher brightness, negligible thermal crosstalk between neighbouring emitters and protection against cascading failed emitters. In addition, insulated sub-mounted laser diodes based on telecommunication standards are preferred to diode bars and stacks because of the degree of assembly automation, and improved lifetime. At present, lasers are packaged on Cu or CuW platforms, whose high thermal conductivities allow an efficient passive cooling. However, as the number of emitters per package increases and improvements in the laser technology enable higher output power, the passive cooling will become insufficient. To overcome this problem, a LTCC platform capable of actively removing the heat generated by the lasers through impingement jet cooling was developed. It was provided with an internal water manifold capable to impinge water at 0.15 lmin-1 flow rate on the back surface of each laser with a variation of less than 2 °C in the temperature between the diodes. The thermal impedance of 2.7°C/W obtained allows the LTCC structure to cool the latest commercial broad area single emitter diode lasers which deliver up to 13 W of optical power. Commonly, the emitters are placed in a “staircase” formation to stack the emitters in the fast-axis, maintaining the brightness of the diode lasers. However, due to technical difficulties of machining the LTCC structure with a staircase-shaped face, a novel out-plane beam shaping method was proposed to obtain an elegant and compact free space combination of the laser beam on board using inexpensive optics. A compact arrangement was obtained using aligned folding mirrors, which stacked the beams on top of each other in the fast direction with the minimum dead space.

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Shinpaugh, Kevin A. "Measurements in the bimodal region of a wing-body junction flow with a rapidly-scanning two-velocity-component laser-Doppler velocimeter". Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-163435/.

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YAGAMI, Hisanori y Tomomi UCHIYAMA. "Numerical Simulation of Particle-Laden Plane Mixing Layer by Three-Dimensional Vortex Method". The Japan Society of Mechanical Engineers, 2006. http://hdl.handle.net/2237/9219.

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Libros sobre el tema "Lader"

United States. Congress. Senate. Committee on Governmental Affairs. Nomination of Philip Lader: Hearing before the Committee on Governmental Affairs, United States Senate, One Hundred Third Congress, first session, on nomination of Philip Lader to be Deputy Director for Management, Office of Management and Budget, May 25, 1993. Washington: U.S. G.P.O., 1994.

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Bock, Jason E. Lazer wars: A laser tag marketing manifesto. Indianapolis, Ind: International Laser Tag Association, 1997.

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Adair, Desmond. Characteristics of a separating confluent boundary layer and the downstream wake. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 1988.

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Driver, David M. Experimental study of a three-dimensional, shear-driven, turbulent boundary layer using a three-dimensional laser doppler velocimeter. [New York]: American Institute of Aeronautics and Astronautics, 1985.

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Programming laser printers: HP and compatibles. Portland, Or: Management Information Source, 1988.

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Later later later. Bloomington, IN: AuthorHouse, 2009.

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O'Hare, J. E. A nonperturbing boundary-layer transition detector. Arnold Air Force Station, Tenn: Arnold Engineering Development Center, 1985.

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Leprince, F. Skin friction determination by LDV measurements in a viscous sublayer: Analysis of systematic errors. Rhode Saint Genese, Belgium: Von Karman Institute for Fluid Dynamics, 1985.

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Thiesse, Carol. Lander. Charleston, S.C: Arcadia Pub., 2010.

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McLean, Bruce. Ladder. London: Knife Edge Press, 1986.

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Capítulos de libros sobre el tema "Lader"

Pucher, Helmut y Karl Zinner. "Zusammenwirken von Lader und Motor". En Aufladung von Verbrennungsmotoren, 67–111. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28990-3_7.

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Dumbrell, John. "Ambassadors Crowe and Lader, 1994–2001". En The Embassy in Grosvenor Square, 302–15. London: Palgrave Macmillan UK, 2012. http://dx.doi.org/10.1057/9781137295576_16.

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Hiereth, Hermann y Peter Prenninger. "Laderregeleingriffe und Regelungsphilosophien für Starrgeometrie- und VTG-Lader". En Aufladung der Verbrennungskraftmaschine, 165–87. Vienna: Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-0650-1_9.

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Friedman, H. W. "Sodium-Layer Laser Guide Stars". En Adaptive Optics for Astronomy, 175–84. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-015-8265-0_11.

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Mankbadi, Reda R. "Later Stages of Boundary-Layer Transition". En Transition, Turbulence, and Noise, 51–82. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2744-2_3.

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Yilbas, Bekir Sami y Shahzada Zaman Shuja. "Laser Melting of Two Layer Materials". En Materials Forming, Machining and Tribology, 59–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36629-1_4.

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Sands, T. D., W. S. Wong y N. W. Cheung. "Layer Transfer by Bonding and Laser Lift-Off". En Wafer Bonding, 377–415. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-10827-7_11.

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Krüger, Jörg, Wolfgang Kautek, Markus Staub y Günther G. Scherer. "Femotosecond-Pulse Laser Micromachining of Metal Layer Composites". En Laser in Forschung und Technik / Laser in Research and Engineering, 966–69. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80263-8_193.

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Xia, Peng y Carl-Philipp Heisenberg. "Quantifying in the Granulosa Layer After Laser Surgery". En Methods in Molecular Biology, 117–28. New York, NY: Springer US, 2021. http://dx.doi.org/10.1007/978-1-0716-0970-5_10.

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Noordam, L. D., P. Balling, B. Broers, J. H. Hoogenraad, D. J. Maas, P. W. van Amersfoort, H. B. van Linden van den Heuvell, A. F. G. van der Meer y R. B. Vrijen. "Climbing a Ladder System by Frequency-Chirped Laser Pulses". En Springer Series in Chemical Physics, 223–27. Berlin, Heidelberg: Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-85176-6_79.

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Actas de conferencias sobre el tema "Lader"

Wiedemann, B., H. Leptien, G. Stolle y K. D. Emmenthal. "Development of Volkswagen's Supercharger G-lader". En SAE International Congress and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1986. http://dx.doi.org/10.4271/860101.

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Dejian Meng, Jianfeng Sun y Jian Gao. "The intensity image mosaic of LADER based on SIFT". En 2013 International Conference on Optoelectronics and Microelectronics (ICOM). IEEE, 2013. http://dx.doi.org/10.1109/icoom.2013.6626504.

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Kuck, H. A., V. Fleischer y W. Schnorbus. "VOLKSWAGEN'S NEW 1,3 L HIGH PERFORMANCE SI-ENGINE SUPERCHARGED BY THE VW G-LADER". En SAE International Congress and Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1986. http://dx.doi.org/10.4271/860102.

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Azkargorta, J., I. Iparraguirre, R. Balda, J. Fernandez y A. Kaminskii. "Spectroscopy and Lader Action of Cr/sup 3+/, Nd/sup 3+/: La/sub 3/Ga/sub 5/SIO/sub 14/ Crystal with Ca-Gallogermanate Structure". En EQEC'96. 1996 European Quantum Electronic Conference. IEEE, 1996. http://dx.doi.org/10.1109/eqec.1996.561933.

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Nath, Ashish Kumar y Muvvala Gopinath. "Assessment of Microstructure and Mechanical Properties in Laser Cladding, Welding and Surface Polishing Through Online Monitoring of Thermal History". En ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2722.

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Abstract Monitoring and controlling the microstructure, phases, and thermal stresses in laser cladding of materials which determine their mechanical properties is essential for ensuring repeatability and reproducibility in refurbishing engineering parts and building functional parts by layer-by-layer deposition in additive manufacturing process. Several studies have been reported on on-line monitoring of temperature, melt-pool geometry, and porosity etc. in laser powder deposition process, but only a few on the assessment of solidification morphology, microstructure, and thermal stresses. Since these features are dictated by the melt-pool lifetime, cooling and solidification rates, their effects on the evolution of microstructure and the state of ceramic particles in laser deposition of Ni-super alloy and metal matrix composites of WC and TiC are investigated in the current study. Good correlation exists between the thermal history monitored online and the solidification characteristics. Process maps based on the melt-pool lifetime as a function of laser cladding parameters for these materials are developed. On-line monitoring of thermal cycle is extended to laser welding of stainless steel and titanium which are difficult to join together due to the formation of brittle intermetallic phases, and laser polishing of thermal sprayed ceramic coating to develop a better understanding and control of these processes. Melt-pool lifetime is found to have significant effect on the crack growth in fusion welding and by optimizing the former the later could be mitigated. Similarly, the cooling rate in laser polishing of thermal sprayed ceramic coating is found to have significant influence on the surface roughness and residual stress. These studies show that the online monitoring of thermal history can be exploited for controlling the process quality and ensuring the repeatability and reproducibility in different laser material processing modalities.

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WESTERHOFF, F., L. BRENDEL y D. E. WOLF. "LAYER-BY-LAYER PATTERN PROPAGATION AND PULSED LASER DEPOSITION". En From Atoms, Molecules and Clusters in Complex Environment to Thin Films and Multilayers. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793652_0013.

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Kozhukh, N. M., E. V. Klyachkovskaya, V. A. Rozantsev, E. A. Ershov-Pavlov y S. V. Gaponenko. "Layer-by-layer laser spectral microanalysis of art painting". En SPIE Proceedings, editado por Vitaly I. Konov, Vladislav Y. Panchenko, Koji Sugioka y Vadim P. Veiko. SPIE, 2006. http://dx.doi.org/10.1117/12.675036.

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Wang, Xin, Douglas A. Bristow y Robert G. Landers. "A Switched Adaptive Model for Layer-to-Layer Selective Laser Melting With Varying Laser Paths". En ASME 2020 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/dscc2020-3222.

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Abstract Selective Laser Melting (SLM) is an additive manufacturing technique that uses a moving laser source to melt and solidify an area of a powder bed by scanning over the area with a laser beam, thus, fabricating a solid part layer by layer. Although SLM can print complex geometries that are difficult to achieve by machining, quality and repeatability of a printed part are still two challenges that must be addressed. These challenges arise due to the complex physical transformation of the metal powder and the lack of mature process control schemes. Researchers often use optical sensors for the feedback control of SLM processes. Since fast motion of laser beams may not allow real time feedback control given the large quantity of data to be processed, some researchers have applied layer-to-layer control, i.e., collecting data during the fabrication of an entire layer and then updating process parameter profiles for the next layer. In this paper, by specifying the input and output as laser power and peak temperature, a parameter adaption model is used to estimate the unknown input-output model, which is difficult to evaluate analytically due to complex process physics. In addition, laser paths in SLM usually vary to create more isotropic parts than can be achieved with constant laser paths. The variation of laser paths results in varying local thermal histories. To handle the common situation where laser paths are varying from layer to layer, a switched model is designed and trained by a Parameter Adaption Algorithm (PAA). In a simulation of an overhang part with a constant cross-section and varying laser paths, the switched adaptive model shows the ability to achieve a desired output profile and also better performance if more switched gains are utilized.

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Iwatani, Shingo, Yasuhito Ogata, Keisuke Uenishi, Kojiro F. Kobayashi y Akihiko Tsuboi. "Diode Laser Cladding on A5052 Aluminium Alloy for Wear Resistance". En ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72442.

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In order to improve a wear resistance of aluminium alloy, we proposed a diode laser cladding on the surface of a A5052 aluminium alloy. Firstly, an applicability of diode laser to laser cladding was evaluated. In this result, application of diode laser made it possible to obtain stable beads in low heat input compared with CO2 laser. According to the increase in aluminium content in the obtained clad layer, the microstructure of the clad layer changed as γ (8∼20%) → γ + α (10∼30%) → Fe3Al (30%∼). At the interface between the clad layer and the aluminium alloy substrate, the reaction layer consisting of Fe2Al5 and FeAl3 formed. In the abrasion wear the obtained clad layers exhibited a higher wear resistance compared with the aluminium alloy.

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Kongsuwan, Panjawat, Grant B. Brandal y Y. Lawrence Yao. "Laser Induced Porosity and Crystallinity Modification of a Bioactive Glass Coating on Titanium Substrates". En ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9272.

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Functionally graded bioactive glass coatings on bioinert metallic substrates were produced by using continuous-wave (CW) laser irradiation. The aim is to achieve strong adhesion on the substrates and high bioactivity on the top surface of a coating material for load-bearing implants in biomedical applications. The morphology and microstructure of the bioactive glass from the laser coating process were investigated as functions of processing parameters. Laser sintering mechanisms were discussed with respect to the resulting morphology and microstructure. It has been shown that double layer laser coating results in a dense bond coat layer and a porous top coat layer with lower degree of crystallinity than an enameling coating sample. The dense bond coat strongly attached to the titanium substrate with a ten microns wide mixed interfacial layer. A highly bioactive porous structure of the top coat layer is beneficial for early formation of a bone-bonding HCA layer. The numerical model developed in this work also allows for prediction of porosity and crystallinity in top coat layers of bioactive glass developed through laser induced sintering and crystallization.

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Informes sobre el tema "Lader"

Max, C. E. ,. LLNL. Image improvement from a sodium-layer laser guide star adaptive optics system. Office of Scientific and Technical Information (OSTI), junio de 1997. http://dx.doi.org/10.2172/305943.

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Koch, J., E. Dewald, N. Izumi, B. Kozioziemski, O. Landen y C. Siders. Pulsed Laser-Based X-Ray Sources for Rapid-Cool DT Layer Characterization. Office of Scientific and Technical Information (OSTI), agosto de 2007. http://dx.doi.org/10.2172/917894.

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Shixhiao, Le. Laser Glittering in the Relatively Stable Propagation Layer Near the Sea Surface. Fort Belvoir, VA: Defense Technical Information Center, noviembre de 1991. http://dx.doi.org/10.21236/ada246374.

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Talghader, Joseph J. High Power Optical Coatings by Atomic Layer Deposition and Signatures of Laser-Induced Damage. Fort Belvoir, VA: Defense Technical Information Center, agosto de 2012. http://dx.doi.org/10.21236/ada564804.

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Olivier, S. S., C. E. Max, H. W. Friedman, J. An, K. Avicola, B. V. Beeman, H. D. Bissinger et al. First significant image improvement from a sodium-layer laser guide star adaptive optics system at Lick Observatory. Office of Scientific and Technical Information (OSTI), julio de 1997. http://dx.doi.org/10.2172/576003.

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Reid, Jeffrey S., Douglas L. Westphal, Richard M. Paulus, Si-Chee Tsay y Alexander Van Eijk. Preliminary Evaluation of the Impacts of Aerosol Particles on Laser Performance in the Coastal Marine Boundary Layer. Fort Belvoir, VA: Defense Technical Information Center, junio de 2004. http://dx.doi.org/10.21236/ada425811.

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Siegman, A. E. Laser Physics and Laser Techniques. Fort Belvoir, VA: Defense Technical Information Center, noviembre de 1991. http://dx.doi.org/10.21236/ada247326.

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Balakrishnan, Ganesh. Mode-locking of an InAs Quantum Dot Based Vertical External Cavity Surface Emitting Laser Using Atomic Layer Graphene. Fort Belvoir, VA: Defense Technical Information Center, julio de 2015. http://dx.doi.org/10.21236/ada624515.

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Zhu, Jianzhong. New development of laser-based techniques in applications of thin-layer chromatography, microprobe elemental analysis and gas phase pyrolysis. Office of Scientific and Technical Information (OSTI), enero de 1990. http://dx.doi.org/10.2172/7121607.

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Chen, Pisin. Longitudinal Laser Shaping in Laser Wakefield Accelerators. Office of Scientific and Technical Information (OSTI), agosto de 2001. http://dx.doi.org/10.2172/787215.

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