Relevant bibliographies by topics / Systeme ir

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Systeme ir'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Systeme ir.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Systeme ir"

1

Ataka, Kenichi, Tilman Kottke, and Joachim Heberle. "Dünner, kleiner, schneller - wie die IR-Spektroskopie zur Aufklärung des Funktionsmechanismus biologischer und biomimetischer Systeme beiträgt." Angewandte Chemie 122, no. 32 (June 16, 2010): 5544–53. http://dx.doi.org/10.1002/ange.200907114.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ogric, C., W. Schütt, T. Lehotkay, E. Herdtweck, and F. R. Kreißl. "Umwandlung von η2-Thiocarbenkomplexen des Molybdäns und Wolframs in Metalla-thia-cyclopropan-Systeme / Conversion of η2-Thiocarbene Complexes of Molybdenum and Tungsten to Metalla-thio-cyclopropane Systems." Zeitschrift für Naturforschung B 50, no. 12 (December 1, 1995): 1839–44. http://dx.doi.org/10.1515/znb-1995-1210.

Full text
Abstract:
Cationic η2-thiocarbene complexes of molybdenum and tungsten [Cp(CO)2Me][ BF4] (M = Mo, W; R = Ph, Tol; L = CO, PMe3) react with the germylene Ge{N(tBu)CH2CH2N(tBu)}, the plumbylene Pb{N(SiMe3)2}2, or with sodium azide and sodium thiosulfate to give neutral metalla-thia-cyclopropane complexes Cp(CO)2-. Instead of the expected cycloaddition or substitution reactions the formal addition of thiomethanolat at the carbene carbon atom is observed. On treating the corresponding trimethylphosphine substituted η2-thiocarbene complex of molybdenum [Cp(CO)(PMe3)[BF4] with diethylamine or N,N,N′,N′-tetramethylguanidine a cationic molybda-thia-cyclopropane system is formed. The products have been characterized by 1H, 13C, 31P NMR, IR and mass spectra. The crystal structure of 5a has been determined; space group with a = 1340,4(2), b - 1097,7(1), c = 1101,8(5) pm and Z = 4.
APA, Harvard, Vancouver, ISO, and other styles
3

Grobe, Joseph, Duc Le Van, and Jürgen Nientiedt. "Reaktive E = C (p—p) π -Systeme, XI. Hydrometallierungsreaktionen des Perfluor-2-phosphapropens F3CP = CF2/ Reactive E = C (p —p) π -Systems, XI. Hydrometallation Reactions of Perfluoro-2-phosphapropene F3CP = CF2." Zeitschrift für Naturforschung B 42, no. 8 (August 1, 1987): 984–92. http://dx.doi.org/10.1515/znb-1987-0810.

Full text
Abstract:
AbstractThe reactions of F3CP = CF2 (1) with Me3GeH, Me3SnH, and (C5R5)(CO)3MH (M = Cr. Mo, W; R = H , Me) proceed via addition to the PC double bond yielding tertiary phosphanes of the type Me3M′P(CF3)CF2H[M′ = Ge (2), Sn (3)] or (C5R5)(CO)3MP(CF3)CF2H [R = H; M - Cr (6), Mo (7). W (8); R = Me; M = Mo (9), W (10)]. 2 and 3 are labile compounds, which decompose by elimination of Me3M′F , a reaction which in the case of 3 has been used to prepare the new phosphaalkene F3CP = C(H)F (5) and its [2+4]-cycloaddition product 4 with 2.3-dimethyl-1.3- butadiene. The H substituent (instead of F) in 5 and its derivatives has a surprising influence not only on the stability of the compounds but also on their spectroscopic data, as shown by com parison with 1 and derivatives of the type Me3M ′P(CF3)2 and (C5H5)(CO)3MP(CF3)2. respectively. New compounds are characterized by NMR, MS. GC/MS and IR measurements.
APA, Harvard, Vancouver, ISO, and other styles
4

Grobe, Joseph, and Jürgen Szameitat. "Reaktive E=C(p—p)π-Systeme, XVI [1] Trimethylstannvlphosphane des Typs Me3SnP(R)CF3 (R = Me, Et) als Phosphaalken-Vorstufen / Reactive E=C(p-p)π-Systeme, XVI [1] Trimethylstannylphosphanes of the Type Me3SnP(R)CF3 (R = Me, Et) as Phosphaalkene Precursors." Zeitschrift für Naturforschung B 43, no. 4 (April 1, 1988): 427–37. http://dx.doi.org/10.1515/znb-1988-0408.

Full text
Abstract:
AbstractStannylphosphanes of the type Me3SnP(R)CF3 [R = Me (1), Et (2)] have been prepared by a multistep synthesis (Fig. 1) starting either with F3CPI2 or with P(NEt2)3. Due to the alkyl sub­stituents, 1 and 2 show a higher thermal stability than the analogous perfluoroalkyl compounds Me3SnP(RF)2 (RF = CF3, C2F5). Pyrolysis of 1 and 2 at 380 °C/10-3 Torr gives the new phosphaalkenes RP=CF2 (R = Me, Et) as reactive intermediates collected at -196 °C. They polymerize on the attempt to prepare diluted solutions even at very low temperatures. In case of the ethyl derivative the product (EtPCF2)x is a colourless polymer which on heating (500-600 °C) yields a mixture of dimers (EtPCF2)2 (trans-, cis-1,3- and trans-1,2-diphosphetane; ratio 73:13,5:13,5). 1 and 2 have been used as equivalents of the phosphaalkenes RP=CF2 in one-pot reactions with 2,3-dimethylbutadiene and 1,3-cyclohexadiene, respectively. The labile P=C intermediates pro­duced at 120 °C are captured by the dienes affording the [2+4]-cycloadducts 3-6 in good yields. Oxidation with sulfur gives the corresponding phosphane sulfides 7-10 in almost quantitative yields. New compounds were characterized by spectroscopic (NMR, MS, IR) and analytical methods.
APA, Harvard, Vancouver, ISO, and other styles
5

Grobe, Joseph, Duc Le Van, and Jürgen Nientiedt. "Reaktive E=C(p-p)π-Systeme, VI [1] Reaktionen des Phosphaalkens F3CP=CF2 mit H-aciden Verbindungen/Reactive E = C(p-p)π-Systems, VI [1] Reactions of the Phosphaalkene F3CP = CF2 with H Acidic Compounds." Zeitschrift für Naturforschung B 41, no. 2 (February 1, 1986): 149–61. http://dx.doi.org/10.1515/znb-1986-0203.

Full text
Abstract:
The reactions o f the perfluorophosphaalkene F3CP = CF2 (1) with HX compounds proceed via addition to the PC double bond yielding either secondary phosphanes F3CP(H)CF2X (X = OH, OR, NR2, PMe2) or PX derivatives F3CP(X)CF2H (X = Cl, Br, SMe, SeMe, AsMe2). The rate of reaction with H2O is strongly pH-dependent, but only at pH > 13 the opposite direction of addition is observed. Similar results are obtained for the addition of alcohols, for which the presence of OR- results in two effects: (i) Reversion of the addition direction to yield F3CP(OR)CF2H; (ii) HF elimination from F3CP(H)CF2OR to give substituted phosphaalkenes. With strong bases HNR2, the addition is followed immediately by HF elimination producing the surprisingly stable phosphaalkenes F3CP = C(F)NR2 (R = Me, Et). Secondary phosphanes of the type F3CP(H)CF2X (X = OMe, OEt, PMe2) are found to be suitable precursors for the preparation of novel heterosubstituted derivatives of 1 by elimination of HF with NMe3. New compounds were characterized by NMR, MS, GC/MS and GC/IR measurements.
APA, Harvard, Vancouver, ISO, and other styles
6

Grobe, Joseph, Duc Le Van, and Gudrun Lange. "Reaktive E=C(p–p)π Systeme, XXXIV Addition von Alkoholen oder primären Aminen an Phosphaalkene F3CP=C(F)OR. Neue Trifluormethylphosphane und -phosphaalkene/Reactive E = C( p – p ) π-Systems, XXXIV Addition of Alcohols or Primary Amines to Phosphaalkenes F3CP= C(F)OR . Novel Trifluoromethylphosphanes and Phosphaalkenes." Zeitschrift für Naturforschung B 48, no. 1 (January 1, 1993): 58–67. http://dx.doi.org/10.1515/znb-1993-0114.

Full text
Abstract:
The course of the reactions o f fluorophosphaalkenes F3CP = C (F)OR [R = Me (1), Et (2)] with methanol or ethanol strongly depends on the experimental conditions. Thus at 70 °C a mixture of the 2-phosphapropionic acid ester F3CP (H )CO2R [R = Me (3), Et (4)] and trifluoromethylphosphane H2PCF3 is formed [molar ratio: 3 or 4 /H2 CF3 ≈1/1]. If the precursors F3CP (H )CO2R [R = Me (3), Et) are used as starting materials, the reaction with ROH under the same conditions affords 3 and 4, respectively, (90 to 95% yield) with only traces of H2PCF 3. In the presence o f iPr2NH these precursors react with R′OH to give the novel trifluoromethylphosphaalkenes F3CP = C (OR )OR [R /R′: Me/Me (6); E t/E t (7); Me/Et (8)]. With Et2NH , 3 undergoes an addition/elimination process yielding the interesting push/pull system Et2N(F)C = P-CO2Me (5). 1 and 2 react with primary amines R′NH2 (R′= tBu, Me) with stereoselective formation of the fairly labile phosphaalkenes F3CP = C(OR)NHR′ [R /R′: Me/tBu (9), Et/tBu(10), Me/Me (11)] with trans-positions for CF3 and NHR′.The new compounds 3 -11 were characterized by spectroscopic investigations (1H , 19F, 31P, 13C NMR ; IR, MS) and determination of M+ or typical fragment ions [M+ -OR ] by high resolution mass spectrometry.
APA, Harvard, Vancouver, ISO, and other styles
7

Grobe, Joseph, Duc Le Van, Jost Winnemöller, Bernt Krebs, and Mechtild Läge. "Reaktive E=C(p-p)π-Systeme, XLIII [1] Darstellung und Charakterisierung P-Phosphino- oder P-Arsino-substituierter Fluorphosphaalkene des Typs R2E-P=C(F)NEt2 (R = Me, CF3, Me2N; E = P, As) / Reactive E=C(p-p)-π Systems XLIII [1] Synthesis and Characterization of P-Phosphino or P-Arsino Substituted Fluorophosphaalkenes of the Type R2E-P=C(F)NEt2 (R= Me, CF3, Me2N; E = P As)." Zeitschrift für Naturforschung B 51, no. 6 (June 1, 1996): 778–84. http://dx.doi.org/10.1515/znb-1996-0604.

Full text
Abstract:
Abstract The easily accessible phosphaalkene HP=C(F)NEt2 (lb) reacts with halophosphanes or -arsanes R2EX (X = Cl, I) in the presence of NEt3 to give P-phosphino- or -P-arsino substituted fluorophosphaalkenes of the type RiE-P=C(F)NEti (2 - 6) in high yields (60 - 85 %) [R2E: (CF3)2P (2), Me2N(CF3)P (3), Me2P (4), (CF3)2As (5), Me2As (6)]. The analogous reaction of ib with CF3PI2 (molar ratio 1:2) unexpectedly leads to the triphosphetene Et2N - C=P-PCF3-PCF3 (7). The stability of compounds 2 - 6 as a function of R2E decreases from As to P and from CF3 to Me, respectively. Compounds 2 - 6 generally show the Z-configuration and have been characterized by thorough spectroscopic investigations (MS,IR; 1H, 19F, 11C, 31PNMR). A single crystal X-ray diffraction study of 2 proves the π-type interaction of the nitrogen lone pair with the P=C bond thus enhancing the stability of the system and the PP bond order
APA, Harvard, Vancouver, ISO, and other styles
8

Dyke, Peter J. "Transmission Systems." IEE Review 38, no. 6 (1992): 234. http://dx.doi.org/10.1049/ir:19920093.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Elder, Hugh. "Metering systems." IEE Review 39, no. 2 (1993): 66. http://dx.doi.org/10.1049/ir:19930029.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Johnston, E. C. "Satellite Communications Systems." IEE Review 34, no. 2 (1988): 86. http://dx.doi.org/10.1049/ir:19880028.

Full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Systeme ir"

1

YAO, JIANHUA. "Systeme sirs-ss : simulation spectrale ir et raman, par association sous-structures/sous-spectres." Paris 7, 2000. http://www.theses.fr/2000PA077236.

Full text
Abstract:
Un systeme de simulation spectrale ir/raman, sirs-ss (spectres ir/raman simules par la methode de correlations sous structures/sous spectres), a ete concu et developpe. Ce logiciel de simulation spectrale ir/raman consiste en deux volets principaux : 1. La construction des bases de donnees sous-structures/sous-spectres ir/raman ; 2. La simulation des spectres ir/raman. Quatre types de bases de donnees, associant information structurale et information spectrale, molecules simples, fragments particuliers, frels de foyer atome, frels de foyer liaison, ont ete construits dans sirs-ss en utilisant la methode du data mining. Elles ont ete ordonnees d'apres les proprietes des fragments, la notion frel (precis ou flou) et les statistiques du cas (chemical abstract service). Dans ces bases, la description structurale est effectuee a partir de l'ensemble des informations sur les atomes et les liaisons. La simulation des spectres ir/raman est realisee par l'extraction systematique des sous structures pertinentes incluses dans la molecule cible, sous structures auxquelles sont associees les bandes caracteristiques correspondantes. Les divers modules de reconnaissance des fragments, ont ete realisees en adaptant au probleme l'algorithme d'ullmann. De nombreux tests effectues et des etudes comparatives avec les (rares) logiciels existant dans le domaine etablissent que sirs-ss est un systeme fiable et convivial.
APA, Harvard, Vancouver, ISO, and other styles
2

Olschewski, Martin [Verfasser]. "Von einzelnen H-Brücken zum chemischen Rezeptor : 2D-IR-Spektroskopie wasserstoffverbrückter Systeme / Martin Olschewski." Bonn : Universitäts- und Landesbibliothek Bonn, 2014. http://d-nb.info/123868775X/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Engelhardt, Astrid. "Untersuchungen zum Phasenumwandlungs- und Ordnungsparameterverhalten ferroelastischer Systeme mittels der lokalen Sonden Raman-, IR- und NMR-Spektroskopie." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969275528.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Beyvers, Stephanie. "Selective excitation of adsorbate vibrations on dissipative surfaces." Phd thesis, Universität Potsdam, 2008. http://opus.kobv.de/ubp/volltexte/2008/2551/.

Full text
Abstract:
The selective infrared (IR) excitation of molecular vibrations is a powerful tool to control the photoreactivity prior to electronic excitation in the ultraviolet / visible (UV/Vis) light regime ("vibrationally mediated chemistry"). For adsorbates on surfaces it has been theoretically predicted that IR preexcitation will lead to higher UV/Vis photodesorption yields and larger cross sections for other photoreactions. In a recent experiment, IR-mediated desorption of molecular hydrogen from a Si(111) surface on which atomic hydrogen and deuterium were co-adsorbed was achieved, following a vibrational mechanism as indicated by the isotope-selectivity. In the present work, selective vibrational IR excitation of adsorbate molecules, treated as multi-dimensional oscillators on dissipative surfaces, has been simulated within the framework of open-system density matrix theory. Not only potential-mediated, inter-mode coupling poses an obstacle to selective excitation but also the coupling of the adsorbate ("system") modes to the electronic and phononic degrees of freedom of the surface ("bath") does. Vibrational relaxation thereby takes place, depending on the availabilty of energetically fitting electron-hole (e/h) pairs and/or phonons (lattice vibrations) in the surface, on time-scales ranging from milliseconds to several hundreds of femtoseconds. On metal surfaces, where the relaxation process of the adsorbate via the e/h pair mechanism dominates, vibrational lifetimes are usually shorter than on insulator or semiconductor surfaces, in the range of picoseconds, being also the timescale of the IR pulses used here. Further inhibiting factors for selectivity can be the harmonicity of a mode and weak dipole activities ("dark modes") rendering vibrational excitation with moderate field intensities difficult. In addition to simple analytical pulses, optimal control theory (OCT) has been employed here to generate a suitable electric field to populate the target state/mode maximally. The complex OCT fields were analyzed by Husimi transformation, resolving the control field in time and energy. The adsorbate/surface systems investigated were CO/Cu(100), H/Si(100) and 2H/Ru(0001). These systems proved to be suitable models to study the above mentioned effects. Further, effects of temperature, pure dephasing (elastic scattering processes), pulse duration and dimensionality (up to four degrees of freedom) were studied. It was possible to selectively excite single vibrational modes, often even state-selective. Special processes like hot-band excitation, vibrationally mediated desorption and the excitation of "dark modes" were simulated. Finally, a novel OCT algorithm in density matrix representation has been developed which allows for time-dependent target operators and thus enables to control the excitation mechanism instead of only the final state. The algorithm is based on a combination of global (iterative) and local (non-iterative) OCT schemes, such that short, globally controlled time-intervals are coupled locally in time. Its numerical performance and accuracy were tested and verified and it was successfully applied to stabilize a two-state linear-combination and to enforce a successive "ladder climbing" in a rather harmonic system, where monochromatic, analytical pulses simultaneously excited several states, leading to a population loss in the target state.
Die selektive Anregung von Molekülschwingungen mittels Infrarotlicht (IR) ist vorteilhaft, um die Wirkungsquerschnitte nachfolgender photochemischer oder photophysikalischer Prozesse zu steigern, welche durch Elektronenanregung mittels ultraviolettem (UV) bzw. sichtbarem (Vis) Licht ausgelöst werden. Für Adsorbatmoleküle auf Oberflächen wurden theoretische Vorhersagen getroffen, dass eine kombinierte (IR plus UV)-Strategie ("schwingungsvermittelte Chemie") die Ausbeute bei Photodesorption und anderen Photoreaktionen deutlich zu erhöhen vermag. Kürzlich wurde im Experiment gezeigt, dass eine rein IR-vermittelte Desorption möglich ist, welche über einen schwingungsangeregten Mechanismus erfolgt. Hierbei wurde molekularer Wasserstoff von einer Si(111)-Oberfläche desorbiert, an der atomarer Wasserstoff und atomares Deuterium gebunden waren. Eine thermische Anregung, die zum Bindungsbruch führt, konnte hierbei wegen der Isotopenselektivität ausgeschlossen werden. In der vorliegenden Arbeit wurde die selektive IR-Schwingungsanregung von Adsorbaten, die als multidimensionale Oszillatoren auf dissipativen Oberflächen behandelt wurden, mit Hilfe der Dichtematrixtheorie für offene Systeme simuliert. Nicht nur die potentialvermittelte Kopplung zwischen den einzelnen Moden ist ein Hindernis für selektive Anregung, sondern auch die Kopplung der Moden des Adsorbats ("Systems") an elektronische und phononische Freiheitsgrade des Substrats ("Bades"). Die Schwingungsrelaxation verläuft hierbei auf Zeitskalen, die von Millisekunden bis hin zu wenigen hundert Femtosekunden reichen, je nach Verfügbarkeit energetisch geeigneter Elektron-Loch-Paar-Anregungen bzw. Phononen (Gitterschwingungen) in der Oberfläche. Auf Metalloberflächen, bei denen die Schwingungrelaxation des Adsorbats zumeist von einem Elektronen-Loch-Paar-Mechanismus dominiert wird, sind die Schwingungslebensdauern normalerweise kürzer als auf Isolator- oder Halbleiteroberflächen und betragen einige Picosekunden, ebenso wie die Zeitskala der hier gewählten IR-Pulse. Weitere Faktoren, die die selektive Anregung behindern können sind die Harmonizität einer Mode und die geringe Dipolaktivität sogenannter "dunkler Moden", die eine Anregung mit moderat intensiven Feldern erschweren. Zusätzlich zu einfachen analytischen Pulsen wurden Felder mittels Optimaler Kontrolltheorie (OCT) erzeugt, um eine(n) Zielzustand/-mode maximal zu populieren. Komplexe OCT Pulse wurden mit Hilfe der Husimi-Transformation analysiert, welche das Kontrollfeld im Zeit- und Energieraum aufzulösen vermag. Die in dieser Arbeit untersuchten Adsorbat/Oberflächen-Systeme waren CO/Cu(100), H/Si(100) und 2H/Ru(0001), die sich als passende Modelle erwiesen, um oben genannte Faktoren zu untersuchen. Desweiteren wurden die Auswirkungen von Temperatur, reiner Dephasierung (elastische Streuprozesse), Dauer des IR-Pulses und Systemdimensionalit"at (Behandlung von bis zu vier Freiheitsgraden) studiert. Einzelne Schwingungsmoden konnten angeregt werden, in vielen Fällen sogar zustandsselektiv. Spezielle Prozesse wie die Anregung "heißer Banden", Desorption via alleiniger Schwingungsanregung und die Anregung "dunkler Moden" wurden simuliert. Schließlich wurde ein neuer OCT-Algorithmus in Dichtematrixdarstellung entwickelt, der es erlaubt, zeitabhängige Zieloperatoren einzuführen, um nicht nur Kontrolle über den Endzustand einer Anregung, sondern auch über den Anregungsmechanismus zu erlangen. Der Algorithmus basiert auf einer Kombination von globaler (iterativer) und lokaler (nicht-iterativer) optimaler Kontrollschemata in der Art, dass kurze, global kontrollierte Intervalle zeitlich lokal miteinander gekoppelt werden. Nach numerischen Tests wurde der Algorithmus erfolgreich angewandt, um eine Linearkombination aus zwei Zuständen zu stabilisieren, sowie um eine schrittweise "Leiteranregung" in einem harmonischen System zu forcieren, bei dem monochromatische, analytische Pulse mehrere Zustände zugleich anregen und somit einen Populationsverlust im angestrebten Zielzustand zur Folge haben.
APA, Harvard, Vancouver, ISO, and other styles
5

Wilhelm-Stein, Thomas. "Information Retrieval in der Lehre." Doctoral thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-199778.

Full text
Abstract:
Das Thema Information Retrieval hat insbesondere in Form von Internetsuchmaschinen eine große Bedeutung erlangt. Retrievalsysteme werden für eine Vielzahl unterschiedlicher Rechercheszenarien eingesetzt, unter anderem für firmeninterne Supportdatenbanken, aber auch für die Organisation persönlicher E-Mails. Eine aktuelle Herausforderung besteht in der Bestimmung und Vorhersage der Leistungsfähigkeit einzelner Komponenten dieser Retrievalsysteme, insbesondere der komplexen Wechselwirkungen zwischen ihnen. Für die Implementierung und Konfiguration der Retrievalsysteme und der Retrievalkomponenten werden Fachleute benötigt. Mithilfe der webbasierten Lernanwendung Xtrieval Web Lab können Studierende praktisches Wissen über den Information Retrieval Prozess erwerben, indem sie Retrievalkomponenten zu einem Retrievalsystem zusammenstellen und evaluieren, ohne dafür eine Programmiersprache einsetzen zu müssen. Spielemechaniken leiten die Studierenden bei ihrem Entdeckungsprozess an, motivieren sie und verhindern eine Informationsüberladung durch eine Aufteilung der Lerninhalte
Information retrieval has achieved great significance in form of search engines for the Internet. Retrieval systems are used in a variety of research scenarios, including corporate support databases, but also for the organization of personal emails. A current challenge is to determine and predict the performance of individual components of these retrieval systems, in particular the complex interactions between them. For the implementation and configuration of retrieval systems and retrieval components professionals are needed. By using the web-based learning application Xtrieval Web Lab students can gain practical knowledge about the information retrieval process by arranging retrieval components in a retrieval system and their evaluation without using a programming language. Game mechanics guide the students in their discovery process, motivate them and prevent information overload by a partition of the learning content
APA, Harvard, Vancouver, ISO, and other styles
6

CHABOISSIER, MARIE-CHRISTINE. "Etude de la transcription et de la regultion du facteur i implique dans le systeme ir de dysgenesie hybride chez drosophila melanogaster." Paris 11, 1993. http://www.theses.fr/1993PA112146.

Full text
Abstract:
Le facteur i de drosophila melanogaster est un element transposable qui appartient a la famille des lines de mammiferes. Ces elements transposent par un intermediaire arn. Le facteur i controle le systeme i-r de dysgenesie hybride, du a l'existence de deux types de souches: les souches inductrices qui possedent des facteurs i actifs et les souches reactives qui en sont depourvues. Le facteur i transpose a haute frequence dans la lignee germinale des femelles sf, issues des croisements entre femelles reactives et males inducteurs. Un arn correspondant a la totalite du facteur i est exprime uniquement dans les conditions de transposition et a des taux correles a la frequence de transposition. Il a toutes les caracteristiques d'un intermediaire de transposition et semble etre egalement utilise pour la synthese des polypeptides necessaires a la transposition. L'activite du facteur i est regulee au niveau transcriptionnel, ainsi qu'au cours du developpement. Le facteur i possede deux orfs et l'orf1 pourrait etre un represseur intervenant dans la transposition du facteur i. Cependant, la surexpression de cette orf n'affecte pas les differentes composantes du systeme i-r de dysgenesie hybride. Afin d'etudier le mecanisme et la regulation de la transposition du facteur i, les premieres etapes de la mise au point d'un element i marque ont ete realisees
APA, Harvard, Vancouver, ISO, and other styles
7

Crozatier, Michèle. "Structure et organisation des elements i impliques dans le systeme i-r de dysgenesie hybride chez drosophila melanogaster." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF21043.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Monin, Jean-Louis. "Conception et réalisation d'une camera astronomique basée sur un détecteur infrarouge bidimensionnel : résultats astrophysiques." Phd thesis, Université Paris-Diderot - Paris VII, 1987. http://tel.archives-ouvertes.fr/tel-00725260.

Full text
Abstract:
Après une étude théorique, puis modélisée, de l'analyse d'une image dans le plan focal d'un télescope par un détecteur à deux dimensions (chapitre 1) et un bref rappel de physique du solide (chapitre 2) on étudie un détecteur infrarouge bidimensionnel de 32x32 l'IRCCD. La description d'une caméra astronomique basée sur ce détecteur, et des choix effectués dans sa réalisation est donnée (chapitre 3). L'attention est portée sur les problèmes de l'observation sous fort flux de photons du fond. Un chapitre entier est consacré à une étude détaillée de l'IRCCD et de ses caractérisriques (chapitre 4). On décrit ensuite l'ensemble du système monté sur télescope, ainsi que les procédures d'observation adoptées (chapitre 5). Quelques résultats de mesure et de calibration sur télescope sont proposés. Le dernier chapitre est consacré à la présentation de résultats astrophysiques préliminaires.
APA, Harvard, Vancouver, ISO, and other styles
9

Lavige, Jean-Marc. "Systeme i-r de dysgenesie hybride chez drosophila melanogaster : etude du developpement abortif des embryons de meres sf." Clermont-Ferrand 2, 1987. http://www.theses.fr/1987CLF21080.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ersoy, Kevin. "Protected IR input system." Click here to view, 2009. http://digitalcommons.calpoly.edu/eesp/18/.

Full text
Abstract:
Thesis (B.S.)--California Polytechnic State University, 2009.
Project advisor: Dennis Derickson. Title from PDF title page; viewed on Jan. 28, 2010. Includes bibliographical references. Also available on microfiche.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Systeme ir"

1

E, Losada David, and Fernández-Luna Juan M, eds. Advances in information retrieval: 27th European Conference on IR Research, ECIR 2005, Santiago de Compostela, Spain, March 21-23, 2005 ; proceedings. Berlin: Springer, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

NACSIS-IR sōgō manyuaru. 3rd ed. Tōkyō: Denki Denshi Jōhō Gakujutsu Shinkō Zaidan, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Sekliuckis, Vitolis. Informacijos sistemos ir duomenų bazės: Informacijos sistemų ir reliacinių duomenų bazių kūrimo pagrindai : vadovėlis. Kaunas: Technologija, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

E, Robertson S. Development of IR evaluation methods: Okapi at TREC. [London]: British Library, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Zimarinas, Olegas. Elektroninių sistemų gamybos kokybė ir valdymas: Vadovėlis. Kaunas: Technologija, 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Walker, Stephen. Okapi at City: An evaluation facility for interactive IR. London: Centre for Interactive Systems Research, City University, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Soesilo, Dwisuryo Indroyono. Iptek untuk kejayaan bangsa: Kumpulan pemikiran Prof. Dr. Ir. Indroyono Soesilo, M.Sc. Bogor: Sains Press, Sarana Komunikasi Utama, 2013.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ramirez-Iniguez, Roberto. Optical wireless communications: IR for wireless connectivity. Boca Raton: CRC Press, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Atmospheric propagation in the UV, visible, IR and MM-wave region and related systems aspects. Neuilly sur Seine, France: AGARD, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ferner, Anthony. The embeddedness of US multinational companies in the US business system: Implications for HR/IR. Leicester: De Montfort University, Leicester Business School, 2000.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Systeme ir"

1

Galambos, Leo. "Dynamization in IR Systems." In Intelligent Information Processing and Web Mining, 297–310. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-39985-8_31.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Franke, P., and D. Neuschütz. "C-Ir (Carbon - Iridium)." In Binary Systems. Part 5: Binary Systems Supplement 1, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-45280-5_37.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Franke, P., and D. Neuschütz. "Cu-Ir (Copper - Iridium)." In Binary Systems. Part 5: Binary Systems Supplement 1, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-45280-5_55.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Franke, P., and D. Neuschütz. "Ir-Ni (Iridium - Nickel)." In Binary Systems. Part 5: Binary Systems Supplement 1, 1–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-45280-5_79.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Franke, P., and D. Neuschütz. "Ir-Pt (Iridium - Platinum)." In Binary Systems. Part 5: Binary Systems Supplement 1, 1–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-45280-5_80.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Franke, P., and D. Neuschütz. "Ir-Rh (Iridium - Rhodium)." In Binary Systems. Part 5: Binary Systems Supplement 1, 1–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-45280-5_81.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Franke, P., and D. Neuschütz. "Ir-Ru (Iridium - Ruthenium)." In Binary Systems. Part 5: Binary Systems Supplement 1, 1–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-45280-5_82.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Franke, P., and D. Neuschütz. "Ir-Zr (Iridium - Zirconium)." In Binary Systems. Part 5: Binary Systems Supplement 1, 1–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-45280-5_83.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Schenkel, Ralf, and Martin Theobald. "Integrated DB and IR Approaches." In Encyclopedia of Database Systems, 1999–2003. New York, NY: Springer New York, 2018. http://dx.doi.org/10.1007/978-1-4614-8265-9_206.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Schenkel, Ralf, and Martin Theobald. "Integrated DB and IR Approaches." In Encyclopedia of Database Systems, 1–4. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4899-7993-3_206-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Systeme ir"

1

Meleško, Jaroslav. "ROBUST AUGMENTED REALITY SYSTEM." In Inžinerinė grafika ir projektavimas. Informacinių technologijų sauga ir informacinės sistemos. VGTU Technika, 2016. http://dx.doi.org/10.3846/itsis.2016.09.

Full text
Abstract:
I developed an augmented reality system based on Hough transform to transcend limitations of popular Augmented Reality libraries such as ArUco. The purpose of the system is to project a digital image on to a real canvas, merging digital and traditional artistic media for ease of art production and practice. The technological challenges were identified in fiducial marker based prototype and overcome in the Hough transform based system are as follows: need for a printed marker, imprecision and weakness to occlusion. The developed software based on Hough transform works with any standard sheet of paper (A4, A3 formats). The system projects a photograph directly on to canvas or paper and automatically rotates and fits the image within the canvas. It is also resistant to occlusion, such as a hand on top of the canvas or canvas that is not fully within the frame. Resistance to small scale noise is achieved thought Hough transform and large occlusions are overcome by a line averaging algorithm. The software has shown 14% better performance than analogical ArUco library based software.
APA, Harvard, Vancouver, ISO, and other styles
2

Picard, Justin, and Rolf Haenni. "Modeling Information Retrieval with Probabilistic Argumentation Systems." In 20th Annual BCS-IRSG Colloquium on IR. BCS Learning & Development, 1998. http://dx.doi.org/10.14236/ewic/irsg1998.9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Koster, C. H. A., C. Derksen, D. van de Ende, and J. Potjer. "Normalization and Matching in the DORO System." In 21st Annual BCS-IRSG Colloquium on IR. BCS Learning & Development, 1999. http://dx.doi.org/10.14236/ewic/irsg1999.8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Gabrielli, Silvia. "Social and Cognitive Factors in the Design and Evaluation of Multimedia Systems." In 20th Annual BCS-IRSG Colloquium on IR. BCS Learning & Development, 1998. http://dx.doi.org/10.14236/ewic/irsg1998.4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Wondergem, B. C. M., P. van Bommel, T. W. C. Huibers, and Th P. van der Weide. "Agents in Cyberspace – Towards a Framework for Multi-Agent Systems in Information Discovery." In 20th Annual BCS-IRSG Colloquium on IR. BCS Learning & Development, 1998. http://dx.doi.org/10.14236/ewic/irsg1998.15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Petratos, Panagiotis. "Information Retrieval Systems: A Human Centered Approach." In InSITE 2007: Informing Science + IT Education Conference. Informing Science Institute, 2007. http://dx.doi.org/10.28945/3163.

Full text
Abstract:
In this article a human centered approach for Information Retrieval IR systems is offered. The focus of this article is on human users of IR systems, who are given the opportunity to offer enhanced relevance feedback. A novel approach is offered to capture the back-propagated feedback of human users during IR sessions. According to this approach the IR system is developed to accept human bidirectional relevance feedback, which is utilized to further enhance the IR process with the aim of improving IR effectiveness.
APA, Harvard, Vancouver, ISO, and other styles
7

Kuryshev, Georgy L. "Micromechanical IR-systems." In 2011 12th International Conference and Seminar of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM 2011). IEEE, 2011. http://dx.doi.org/10.1109/edm.2011.6006938.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Eakins, J. P., M. E. Graham, and J. M. Boardman. "Evaluation of a trademark image retrieval system." In Proceedings of the 19th Annual BCS-IRSG Colloquium on IR Research. BCS Learning & Development, 1997. http://dx.doi.org/10.14236/ewic/ir1997.1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Dye, Dan, Byard Wood, Lewis Fraas, and Jeff Muhs. "Optical Design of an Infrared Non-Imaging Device for a Full-Spectrum Solar Energy System." In ASME 2003 International Solar Energy Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/isec2003-44229.

Full text
Abstract:
A solar collector/receiver system for a full-spectrum solar energy system is being designed by a research team lead by Oak Ridge National Laboratory and the University of Nevada, Reno. [1,2] This solar energy system is unique in that it utilizes the majority of the solar spectrum by splitting the infrared (IR) and visible energy for two different end uses. The visible light will be used for day lighting and the IR energy for electrical power generation. This paper is concerned with the optics that will provide uniform irradiance of the IR energy on the thermal photovoltaic (TPV) array. The benchmark full-spectrum collector/receiver and prototype TPV array have been built [3], so the work performed here is to match the two systems together for optimal performance. The design consists of a non-imaging (NI) system for the IR flux incident on the TPV array mounted behind the secondary mirror. Results of the ray-tracing analysis of the different systems tested are presented.
APA, Harvard, Vancouver, ISO, and other styles
10

Martin, Stefan R., Mayer Rud, Daniel K. Stern, Paul A. Scowen, Joel Nissen, and John Krist. "HabEx space telescope optical system." In UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts VIII, edited by Howard A. MacEwen and James B. Breckinridge. SPIE, 2017. http://dx.doi.org/10.1117/12.2275191.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Systeme ir"

1

Zhang, Yong-Hang. Time-Resolved IR Electroluminescence Spectroscopy System. Fort Belvoir, VA: Defense Technical Information Center, May 2006. http://dx.doi.org/10.21236/ada461015.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Butler, Donald P., and Zeynep Celik-Butler. GOALI: Systems Integration of Uncooled YBaCuO IR Detectors. Fort Belvoir, VA: Defense Technical Information Center, November 2001. http://dx.doi.org/10.21236/ada398313.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Brill, Gregory, and Yuanping Chen. New Material System for 3rd Generation IR Applications. Fort Belvoir, VA: Defense Technical Information Center, December 2010. http://dx.doi.org/10.21236/ada534844.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Zhang, Yong-Hang. Electrical and Optical Characterization System for IR Photodetectors. Fort Belvoir, VA: Defense Technical Information Center, September 2015. http://dx.doi.org/10.21236/ad1014947.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Li, Sheng S. Development of Ultra-Low Noise, High Sensitivity Planar Metal Grating Coupled AlGaAs/GaAs Multiquantum Well IR Detectors for Focal Plane Array Staring IR Sensor Systems. Fort Belvoir, VA: Defense Technical Information Center, May 1992. http://dx.doi.org/10.21236/ada250368.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Schafermeyer, Erich. An IR and RF Based System for Functional Gait Analysis in a Multi-Resident Smart-Home. Portland State University Library, January 2000. http://dx.doi.org/10.15760/etd.5386.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Workman, Austin, and Jay Clausen. Meteorological property and temporal variable effect on spatial semivariance of infrared thermography of soil surfaces for detection of foreign objects. Engineer Research and Development Center (U.S.), June 2021. http://dx.doi.org/10.21079/11681/41024.

Full text
Abstract:
The environmental phenomenological properties responsible for the thermal variability evident in the use of thermal infrared (IR) sensor systems is not well understood. The research objective of this work is to understand the environmental and climatological properties contributing to the temporal and spatial thermal variance of soils. We recorded thermal images of surface temperature of soil as well as several meteorological properties such as weather condition and solar irradiance of loamy soil located at the Cold Regions Research and Engineering Lab (CRREL) facility. We assessed sensor performance by analyzing how recorded meteorological properties affected the spatial structure by observing statistical differences in spatial autocorrelation and dependence parameter estimates.
APA, Harvard, Vancouver, ISO, and other styles
8

Angell, C. A. Amorphous Fast Ion Conducting Systems, Part 1. Structure and Properties of Mid and Far IR Transmitting Materials, Part 2. Fort Belvoir, VA: Defense Technical Information Center, October 1991. http://dx.doi.org/10.21236/ada253678.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Goldstein, N., J. Lee, S. M. Adler-Golden, and F. Bien. Diode laser-based sensor system for long-path absorption measurements of atmospheric concentration and near-IR molecular spectral parameters. Office of Scientific and Technical Information (OSTI), December 1993. http://dx.doi.org/10.2172/10118156.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Dickens, Brian, and Eric Byrd. Programs to Estimate UV Dosage and Damage. National Institute of Standards and Technology, September 1999. http://dx.doi.org/10.6028/nist.ir.7500.

Full text
Abstract:
The system of programs described in this paper is concerned with estimating the damage ensuing from exposure of specimens in dry and humid atmospheres to UV and visible radiation covering the solar range. Damage is monitored quantitatively by changes in IR spectra. The dose is estimated from UV spectra of the lamps and the interference filters (used to isolate a particular wavelength range). The dosage is estimated from the dose and the UV absorption of the specimens themselves. These programs allow rapid estimation of dosage and damage from regions of data, and manipulation and processing of the massive amounts of data required to carry out such comprehensive tests in a complete yet user-friendly manner.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Systeme ir' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography