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Dissertations / Theses on the topic 'Kecak'

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Published: 4 June 2021

Last updated: 11 February 2022

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1

Sharp, Jonathan. "A Performance Guide to Glenn Kotche's "Monkey Chant"." UKnowledge, 2014. http://uknowledge.uky.edu/music_etds/26.

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Solo percussionist and composer Glenn Kotche has achieved international fame with his experimental percussion-based music, collaborating with and composing for renowned contemporary music ensembles such as the Kronos Quartet, Band on a Can All-Stars, So Percussion, and Eighth Blackbird. One of his most celebrated compositions in recent years is Monkey Chant, which combines acoustic and electronic elements in a solo multiple percussion setting. Written and premiered in 2006, Kotche was inspired to compose Monkey Chant after listening to original field recordings in Bali from the Nonesuch Explorer Series. Found in these recordings is the popular Balinese music and dance drama known as Kecak. Monkey Chant showcases, through percussion, the intricate vocal patterns and recounting of the Ramayana Epic featured in Balinese Kecak. This monograph serves as an informational performance guide for Monkey Chant that simplifies and resolves performance questions and issues. It provides a contextual setting for the work with a brief biography of Glenn Kotche, including his musical influences and inspiration for the composition. Balinese Kecak is examined as well as the Hindu Ramayana tale as it relates to Kotche’s composition, revealing the function for its compositional form. This document also clarifies and details preparatory procedures for collecting and building the unique instruments required, also detailing schematics for electronic audio equipment and setup. Lastly, there is an analysis of compositional style and form, offering optional solutions to performance obstacles.

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2

Schulte, Westenberg Hendrik. "Zur Bedeutung der Keck-Rechtsprechung für die Arbeitnehmerfreizügigkeit." Tübingen Mohr Siebeck, 2008. http://d-nb.info/993926673/04.

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3

Bobra, Monica Godha. "The endless mantra : innovation at the Keck Observatory." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/39439.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Humanities, Program in Writing and Humanistic Studies, 2005.
Includes bibliographical references (leaves 27-30).
A study of historical, current, and future developments at the Keck Observatory revealed a thriving philosophy of innovation. Intended to defy obsoletion and keep the observatory competitive over long time scales, this philosophy continues to resonate with Keck Observatory scientists. The Keck Observatory consists of two 1 0-meter telescopes situated near the apex of Mauna Kea on the big island of Hawaii. Three main innovations keep the observatory competitive. The observatory contains the first modem active optics-controlled segmented primary mirror, principally designed by Dr. Jerry Nelson. Though it currently reigns as the world's largest aperture at 10 meters, monolithic mirror supporters still question its viability. The observatory also links both primary mirrors together as a single 20-meter telescope using interferometry. Finally, the observatory employs both a natural and laser guide star adaptive optics system. Forward-thinking Keck scientists, however, are researching multi-conjugate adaptive optics systems. As a result of its innovations, Keck has retained its position as a major player in the realm of observational astronomy for over a decade.
by Monica Godha Bobra.
S.M.

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4

Bubar, Eric Joseph. "Keck HIRES spectroscopy of candidate post T Tauri stars." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1181666291/.

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5

Keck, Stefan [Verfasser], and Rolf [Akademischer Betreuer] Hempelmann. "Elektrochemische Beschichtung offenporiger Schäume / Stefan Keck ; Betreuer: Rolf Hempelmann." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2017. http://d-nb.info/1154438325/34.

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6

Keck, Stefan Verfasser], and Rolf [Akademischer Betreuer] [Hempelmann. "Elektrochemische Beschichtung offenporiger Schäume / Stefan Keck ; Betreuer: Rolf Hempelmann." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2017. http://d-nb.info/1154438325/34.

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7

Mawet, D., P. Wizinowich, R. Dekany, M. Chun, D. Hall, S. Cetre, O. Guyon, et al. "Keck Planet Imager and Characterizer: concept and phased implementation." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622026.

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The Keck Planet Imager and Characterizer (KPIC) is a cost-effective upgrade path to the W.M. Keck observatory (WMKO) adaptive optics (AO) system, building on the lessons learned from first and second-generation extreme AO (ExA0) coronagraphs. KPIC will explore new scientific niches in exoplanet science, while maturing critical technologies and systems for future ground-based (TMT, FELT, GMT) and space-based planet imagers (HabEx, LUVOIR). The advent of fast low-noise IR cameras (IR-APD, MKIDS, electron injectors), the rapid maturing of efficient wavefront sensing (WFS) techniques (Pyramid, Zernike), small inner working angle (IWA) coronagraphs (e.g., vortex) and associated low-order wavefront sensors (LOWFS), as well as recent breakthroughs in high contrast high resolution spectroscopy, open new direct exoplanet exploration avenues that are complementary to planet imagers such as VLT-SPHERE and the Gemini Planet Imager (GPI). For instance, the search and detailed characterization of planetary systems on solar-system scales around late-type stars, mostly beyond SPHERE and GPI's reaches, can be initiated now at WMKO.

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8

Rawat, Hemendra Kumar. "Vector Instruction Set Extensions for Efficient and Reliable Computation of Keccak." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/72857.

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Recent processor architectures such as Intel Westmere (and later) and ARMv8 include instruction-level support for the Advanced Encryption Standard (AES), for the Secure Hashing Standard (SHA-1, SHA2) and for carry-less multiplication. These crypto-instructions are optimized for a single algorithm and provide significant performance improvements over software written using general-purpose instruction set. However, today's secure systems and protocols do not rely on just one, but a suite of many cryptographic applications that are expected to work in a correct and reliable manner. In this work, we propose a new instruction set for supporting efficient and reliable cryptography on modern processors. For efficiency, we propose flexible instruction set extensions for Keccak, a cryptographic kernel for hashing, authenticated encryption, key-stream generation and random-number generation. Keccak is the basis of the SHA-3 standard and the newly proposed Keyak and Ketje authenticated ciphers. For reliability, we propose a set of trusted instructions to verify the integrity of a cryptographic software library. These instructions are aimed at detecting tamper in the software or in the configurable hardware. We develop the instruction extensions for a 128-bit interface, commonly available in the vector processing unit of many modern processors. Simulation results on GEM5 architectural simulator show that the proposed instructions not only improves the performance of Keccak applications by 2 times (over NEON programming) and 6 times (over assembly programming), but also improves the reliability of applications at a performance overhead of just 6%.
Master of Science

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9

Tanja, Keck [Verfasser]. "Neuronale Korrelate der Emotionsregulation im Kontext sozialer Ängstlichkeit / Keck Tanja." Gießen : Universitätsbibliothek, 2012. http://d-nb.info/1064990169/34.

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10

Steinke, Kirsa. "Die Übertragbarkeit der Keck-Rechtsprechung des EuGH auf die Niederlassungsfreiheit." Frankfurt, M. Berlin Bern Bruxelles New York, NY Oxford Wien Lang, 2009. http://d-nb.info/995713626/04.

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11

Kocowski, Grzegorz [Verfasser], Heinrich [Akademischer Betreuer] Keck, Heinrich [Gutachter] Keck, Albrecht [Gutachter] Neeße, and Lutz [Gutachter] Trojan. "Die transpankreatische Pankreatojejunostomie nach partieller Duodenopankreatektomie in einem Haus der Grund- und Regelversorgung. / Grzegorz Kocowski ; Gutachter: Heinrich Keck, Albrecht Neeße, Lutz Trojan ; Betreuer: Heinrich Keck." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://d-nb.info/1149954450/34.

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12

Graff, Nathaniel. "Differential Power Analysis In-Practice for Hardware Implementations of the Keccak Sponge Function." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1838.

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The Keccak Sponge Function is the winner of the National Institute of Standards and Technology (NIST) competition to develop the Secure Hash Algorithm-3 Standard (SHA-3). Prior work has developed reference implementations of the algorithm and described the structures necessary to harden the algorithm against power analysis attacks which can weaken the cryptographic properties of the hash algorithm. This work demonstrates the architectural changes to the reference implementation necessary to achieve the theoretical side channel-resistant structures, compare their efficiency and performance characteristics after synthesis and place-and-route when implementing them on Field Programmable Gate Arrays (FPGAs), publish the resulting implementations under the Massachusetts Institute of Technology (MIT) open source license, and show that the resulting implementations demonstrably harden the sponge function against power analysis attacks.

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13

Valmorra, Camilla. "Funzioni hash e sicurezza crittografica." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/6300/.

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14

Keck, Eva-Maria [Verfasser], and Michael [Akademischer Betreuer] Heghmanns. "Das Beschlussverfahren in der strafprozessualen Revision / Eva-Maria Keck ; Betreuer: Michael Heghmanns." Münster : Universitäts- und Landesbibliothek Münster, 2016. http://d-nb.info/1141792877/34.

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15

Prochaska, Jason X. "The physical properties of the damped Ly[alpha] systems : a Keck HIRES investigation /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 1998. http://wwwlib.umi.com/cr/ucsd/fullcit?p9828978.

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16

Keck, Frédéric Macherey Pierre. "Le problème de la mentalité primitive Lévy-Bruhl, entre philosophie et anthropologie /." Lille : A.N.R.T, 2003. http://www.univ-lille3.fr/theses/keck-frederic/html/these.html.

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17

Keck, Michael [Verfasser], and Heidrun [Akademischer Betreuer] Potschka. "Bioinformatische Analyse eines proteomischen Datensatzes im Verlauf der Epileptogenese / Michael Keck ; Betreuer: Heidrun Potschka." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2017. http://d-nb.info/1139977938/34.

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18

Keck, Alexander David [Verfasser]. "Methoden zur hochdynamischen und hochgenauen Bahnregelung von Messmaschinen mit multiskaliger Sensorik / Alexander David Keck." Aachen : Shaker, 2018. http://d-nb.info/1159836906/34.

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19

Femenía, Castellá Bruno, Eugene Serabyn, Dimitri Mawet, Olivier Absil, Peter Wizinowich, Keith Matthews, Elsa Huby, et al. "Commissioning and first light results of an L'-band vortex coronagraph with the Keck II adaptive optics NIRC2 science instrument." SPIE-INT SOC OPTICAL ENGINEERING, 2016. http://hdl.handle.net/10150/622007.

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On March 2015 an L'-band vortex coronagraph based on an Annular Groove Phase Mask made up of a diamond sub-wavelength grating was installed on NIRC2 as a demonstration project. This vortex coronagraph operates in the L' band not only in order to take advantage from the favorable star/planet contrast ratio when observing beyond the K band, but also to exploit the fact that the Keck II Adaptive Optics (AO) system delivers nearly extreme adaptive optics image quality (Strehl ratios values near 90%) at 3.7 mu m. We describe the hardware installation of the vortex phase mask during a routine NIRC2 service mission. The success of the project depends on extensive software development which has allowed the achievement of exquisite real-time pointing control as well as further contrast improvements by using speckle nulling to mitigate the effect of static speckles. First light of the new coronagraphic mode was on June 2015 with already very good initial results. Subsequent commissioning nights were interlaced with science nights by members of the VORTEX team with their respective scientific programs. The new capability and excellent results so far have motivated the VORTEX team and the Keck Science Steering Committee (KSSC) to offer the new mode in shared risk mode for 2016B.

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20

Keck, Susi [Verfasser]. "Regulation des Turnover des Tau-Proteins in Nervenzellen bei oxidativem Stress und Neuroinflammation / Susi Keck." Berlin : Freie Universität Berlin, 2009. http://d-nb.info/102362317X/34.

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21

Keck, Therese [Verfasser]. "Development of new remote sensing retrievals for snow/ice characteristics and phytoplankton properties / Therese Keck." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1176707159/34.

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22

Wong, Chin Lin. "Beam Characterization and Systematics of the Bicep2 and Keck Array Cosmic Microwave Background Polarization Experiments." Thesis, Harvard University, 2014. http://nrs.harvard.edu/urn-3:HUL.InstRepos:13065012.

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Inflation, which posits an exponential expansion in the early universe, is well motivated since it resolves questions that are left unexplained by standard LCDM cosmology, such as the flatness and homogeneity of the universe. The exponential expansion of universe during inflation explains the structure in the universe by freezing out the quantum fluctuations of space. These quantum fluctuations are also expected to generate a background of gravitational waves which would then imprint a B-mode polarization signal on the Cosmic Microwave Background. The Bicep2 and Keck Array experiments search for B-mode polarization from inflationary gravitational waves in the Cosmic Microwave Background. Bicep2 and the Keck Array use small aperture, cold, on-axis refracting optics optimized to target the degree angular scales at which the inflationary B-mode polarization is expected to peak. In this thesis we describe the optical design of Bicep2 and the Keck Array. The small aperture design allows us to fully characterize the far-field performance of the instrument on site at the South Pole using thermal and amplified sources on the ground. We describe the efforts taken to characterize the main beam shapes of each polarization sensitive bolometer, as well as the differential beam paramters of each co-located orthogonally polarized detector pair. We study the residual temperature to polarization leakage induced by the beam mismatches after the principle modes have been mitigated in the analysis.
Physics

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23

Mawet, Dimitri, Élodie Choquet, Olivier Absil, Elsa Huby, Michael Bottom, Eugene Serabyn, Bruno Femenia, et al. "CHARACTERIZATION OF THE INNER DISK AROUND HD 141569 A FROM KECK/NIRC2 L-BAND VORTEX CORONAGRAPHY." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/625206.

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HD 141569 A is a pre-main sequence B9.5 Ve star surrounded by a prominent and complex circumstellar disk, likely still in a transition stage from protoplanetary to debris disk phase. Here, we present a new image of the third inner disk component of HD 141569 A made in the L' band (3.8 mu m) during the commissioning of the vector vortex coronagraph that has recently been installed in the near-infrared imager and spectrograph NIRC2 behind the W.M. Keck Observatory Keck II adaptive optics system. We used reference point-spread function subtraction, which reveals the innermost disk component from the inner working distance of similar or equal to 23 au and up to similar or equal to 70 au. The spatial scale of our detection roughly corresponds to the optical and near-infrared scattered light, thermal Q, N, and 8.6 mu m PAH emission reported earlier. We also see an outward progression in dust location from the L' band to the H band (Very Large Telescope/SPHERE image) to the visible (Hubble Space Telescope (HST)/STIS image), which is likely indicative of dust blowout. The warm disk component is nested deep inside the two outer belts imaged by HST-NICMOS in 1999 (at 406 and 245 au, respectively). We fit our new L'-band image and spectral energy distribution of HD 141569 A with the radiative transfer code MCFOST. Our best-fit models favor pure olivine grains and are consistent with the composition of the outer belts. While our image shows a putative very faint point-like clump or source embedded in the inner disk, we did not detect any true companion within the gap between the inner disk and the first outer ring, at a sensitivity of a few Jupiter masses.

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24

Palladino, Steven. "Constraining Primordial Gravitational Waves with BICEP/Keck Array Telescopes and Developing the BICEP Array Housekeeping System." University of Cincinnati / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1627667203636071.

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25

Chang, Kelly N. "Family Matters: An Analysis of Genetic Relatedness of Tetraclita rubescens (The Pink Volcano Barnacle) Over Several Spatial Scales at Monterey and Bodega Bay, California." Scholarship @ Claremont, 2013. http://scholarship.claremont.edu/scripps_theses/298.

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Inbreeding involves the mating of closely related individuals at a higher frequency than at random; this can decrease the average fitness of populations and individuals by reducing the presence of heterozygotes and augmenting the expression of deleterious genes. Since marine invertebrates exhibit widespread dispersal, their potential for inbreeding is often disregarded. The adult sessile state of barnacles creates the potential for inbreeding as a result of necessary copulation between neighboring individuals. Depending on the degree of mixing that occurs during dispersal, closely related individuals or siblings may settle in close proximity, generating the possibility of kin aggregation and consequent inbreeding. Despite the high probability of closely related or sibling barnacles to settle contiguously, their genetic relatedness and potential for inbreeding remain relatively understudied. We examined genetic relatedness between individuals of Tetraclita rubescens at Monterey and Bodega Bay to elucidate the potential for nonrandom dispersal and subsequent inbreeding. Genetic relatedness was assessed through microsatellite analysis, and correlated with geographic distance, and size. There was a significant association between geographic distance and genetic relatedness at Bodega Bay, which may be attributed to lower densities of individuals, frequency of settlement events and oceanographic conditions. The results of this study demonstrate high genetic relatedness at small spatial scales, bolstering the potential for nonrandom dispersal and subsequent inbreeding of T. rubescens.

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26

Keck, Sabine [Verfasser]. "Klinische Ergebnisse der transmyokardialen Laserrevaskularisation als alleiniges Therapieverfahren und in Kombination mit aorto-koronarer Bypassoperation / Sabine Keck." Lübeck : Zentrale Hochschulbibliothek Lübeck, 2010. http://d-nb.info/99966753X/34.

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27

Stumpf, Florian [Verfasser], and Cornelia M. [Akademischer Betreuer] Keck. "Tabletten aus Papier – tablets made from paper – zur oralen Applikation schwerlöslicher Wirkstoffe / Florian Stumpf ; Betreuer: Cornelia M. Keck." Marburg : Philipps-Universität Marburg, 2019. http://d-nb.info/1193177499/34.

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28

Keck, Jonas [Verfasser], and Werner [Akademischer Betreuer] Thiel. "Verwendung von Polyoxometallaten in katalytischen Oxidationsreaktionen – Eine Untersuchung im stationären und kontinuierlichen Betrieb / Jonas Keck ; Betreuer: Werner Thiel." Kaiserslautern : Technische Universität Kaiserslautern, 2021. http://d-nb.info/1229436324/34.

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29

Hoppe, Chantelle. "A thousand years of farming : agricultural practices from the Byzantine to early Ottoman period at Khirbet Faris, the Kerak Plateau, Jordan." Thesis, University of Sheffield, 2001. http://etheses.whiterose.ac.uk/4219/.

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This archaeobotanical analysis was carried out as part of the Khirbet Faris project: a multi- disciplinary archaeological study of a rural village on the Kerak plateau with a chronology dating from the Bronze Age to Ottoman period. It has contributed to the debate surrounding settlement, economic continuity and change and the influence of Islamic expansion on agricultural practices in this environmentally and politically marginal location. An ethnoarchaeological analysis, FIBS (Functional Interpretation of Botanical studies), was carried out to aid the interpretation of crop management practices from archaeobotanical remains. Results of the analysis have indicated general continuity in agricultural activity from the Byzantine to early Ottoman periods: Free threshing wheats, barley, pulses, fig, olive and vine were all cultivated throughout this period. The samples were rich and of mixed origin, and typically dominated by cereal grain and chaff (mostly cleaned barley and wheat grain and chaff). Settled farmers seem to have adopted a mixed economy, utilising a range of crops together with animal herds. Crop residues were used to feed herds and the dung used as fuel, to varying degrees across the site, throughout the Islamic period. Contrary to Watson's (1983) belief that free-threshing wheats were introduced at the time of Islamic expansion, as part of a wider agricultural revolution, these crops seem to have been cultivated from at least the Byzantine period. Signs of agricultural change appear from the 13th century A. D. New, `exotic' crops: cotton, sorghum, watermelon, pistachio and citrus fruit. Analogy with FIBS evidence suggests irrigation may have been introduced at this time. These `introductions' appear first in the mid-Islamic period, not at the advent of Islamic expansion as Watson describes, perhaps due to the marginal location of Kerak. It is questionable whether these `exotic' crops were cultivated or imported as they are present at a low frequency in the samples. Irrigation evidence comes from the weeds of winter cereal crops so there is no direct evidence for the irrigation of `exotic' summer crops. It is, therefore, uncertain to what extent these introductions affected the local landscape and economy. The success of the FIBS analysis in aiding interpretation of the archaeobotanical assemblage, in terms of crop management practices, is encouraging for future archaeobotanical research.

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30

Drekener, Roberta Lopes 1982. "Estudos sintéticos visando à elucidação da estereoquímica de compostos da família das Criptomoscatonas D." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/249267.

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Orientador: Ronaldo Aloise Pilli
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Química
Made available in DSpace on 2018-08-18T11:54:19Z (GMT). No. of bitstreams: 1 Drekener_RobertaLopes_D.pdf: 4694535 bytes, checksum: 998a5a4160bc1a4929a466c8dcfe2462 (MD5) Previous issue date: 2011
Resumo: Neste trabalho descrevemos os avanços sintéticos para obtenção das Criptomoscatonas D1 (41) e D2 (42), isoladas da Cryptocarya mandioccana, para as quais não se encontram sínteses descritas na literatura e suas estruturas tridimensionais ainda não foram elucidadas. As estratégias de síntese propostas para os isômeros 41 e 42 foram baseadas em utilizar como etapa chave a reação aldólica com indução remota 1,5-anti. A primeira proposta envolveu a síntese da metil cetona (R)-153 em 8 etapas e baixo rendimento global (4,2%). Uma nova proposta sintética foi formulada e resultou na síntese da metil cetona (+/-)-157 em 3 etapas e 54% de rendimento. Esta abordagem possibilitou a construção do esqueleto carbônico de 41 e 42, de maneira diastereosseletiva. A etapa aldol utilizando a metil cetona (+/-)-157 foi realizada com sucesso, levando a formação de um aduto diastereoisomérico preferencial (+/-)-162. Já o centro estereogênico em C2' foi formado via redução 1,3-sin empregando-se metodologia de Narasaka para a obtenção de (+/-)-165a e 1,3-anti com a utilização da metodologia de Evans para obtenção de (+/-)-165b. Após manipulações de grupos protetores e de grupos funcionais, os ésteres a,b-insaturados (+/-)-169a e b foram obtidos com a ligação dupla com geometria Z através de metodologia de Horner-Wadsworth-Emmons, com modificação de Still-Gennari. A etapa de remoção do grupo acetonídeo levando aos ésteres a,b-insaturados (+/-)-170a e b foi realizada em meio ácido brando, sendo a ciclização do anel lactônico destes produtos realizada na presença de óxido de dibutilestanho, com excelentes rendimentos em ambas as etapas. Esta abordagem permitiu a formação do composto (+/-)-171a em 6,7% de rendimento e do composto (+/-)-171b em 7,6% de rendimento, a partir do trans-cinamaldeído. A etapa de remoção do grupo protetor p-metoxibenzila, não foi alcançada utilizando-se DDQ ou ZrCl4. Desta forma, embora as sínteses dos compostos 41 e 42 não tenham sido finalizadas e, portanto, a estereoquímica dos produtos naturais da família das Criptomoscatonas D não tenha sido esclarecida, este trabalho permitiu mapear a síntese racêmica destes dois compostos de uma maneira eficiente, contribuindo para que estudos futuros possam definir as estruturas desses produtos naturais
Abstract: Natural compounds of the 5,6-dihydropyranone family, isolated from the genus Cryptocarya (Laureacae), have attracted scientific interest due to their biological activities. Among these compounds, we highlight Cryptomoscatone D1 (41) and D2 (42), isolated from C. mandiocanna, for which a definitive proof of structure is still lacking. In this work, we describe our synthetic efforts toward these compounds. The synthetic strategies proposed for the syntheses of isomers 41 and 42 were based on a key aldol reaction with 1,5-anti remote induction. The first approach involved the synthesis of methyl ketone (R)-153 in 8 steps, however in low overall yield (4.2%). The second synthetic approach led to the synthesis of methyl ketone (+/-)-157, in three steps and 54% overall yield. The aldol step involving methyl ketone (+/-)-157 successfully led to the formation of the diastereoisomer (+/-)-162. The stereogenic center at C2'in (+/-)-165a was established via Narasaka's 1,3-syn reduction while Evans 1,3-anti reduction afforded (+/-)-165b. After manipulation of the protecting and functional groups, a,b-unsaturated esters (+/-)-169a and b were obtained with the desired Z double bond via the Still-Gennari modification of the Horner-Wadsworth-Emmons olefination reaction. Cleavage of the acetonide leading to the a, b-unsaturated d-hydroxyesters (+/-)-170a and b was achieved under mild acidic conditions, and cyclization was performed in the presence of dibutyltin oxide, in excellent yields for both steps. This approach allowed the formation of compound (+/-)-171a in 6.7% yield and compound (+/-)-171b in 7.6% yield, from trans-cinnamaldehyde. Removal of p-methoxybenzyl ether failed using DDQ or ZrCl4 methodologies. Although our studies did not elucidate the structures of Cryptomoscatone D1 (41) and D2 (42), they are a valuable contribution for future efforts aimed to unambiguously establish the structure of these natural products
Doutorado
Quimica Organica
Doutor em Ciências

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31

Brandt, Hannes [Verfasser], Roland Siegfried [Gutachter] Croner, Robert [Gutachter] Grützmann, and Tobias [Gutachter] Keck. "The Influence of Liver Resection on Intrahepatic Tumor Growth / Hannes Brandt ; Gutachter: Roland Siegfried Croner, Robert Grützmann, Tobias Keck." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2016. http://d-nb.info/1140642464/34.

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Keck, Thomas [Verfasser], and M. [Akademischer Betreuer] Feindt. "Machine learning algorithms for the Belle II experiment and their validation on Belle data / Thomas Keck ; Betreuer: M. Feindt." Karlsruhe : KIT-Bibliothek, 2017. http://d-nb.info/1149522534/34.

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Hödl, Sascha Oliver. "Die Beurteilung von verkaufsbehindernden Massnahmen im Europäischen Binnenmarkt : neue Interpretationsansätze zu Art. 30 EGV auf der Grundlage der Keck-Entscheidung /." Baden-Baden : Nomos-Verl.-Ges, 1997. http://www.gbv.de/dms/spk/sbb/recht/toc/278949304.pdf.

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Lucas, Ashley Elizabeth. "Performing the (un)imagined nation : the emergence of ethnographic theatre in the late twentieth century /." Diss., Connect to a 24 p. preview or request complete full text in PDF formate. Access restricted to UC campuses, 2006. http://wwwlib.umi.com/cr/ucsd/fullcit?p3236642.

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Keck, Mandy [Verfasser], Rainer [Akademischer Betreuer] Groh, Rainer [Gutachter] Groh, Jens [Gutachter] Geelhaar, and Thomas [Gutachter] Schlegel. "Visuelle Exploration multidimensionaler Informationsräume : Ein Interface-Baukasten für die Produktsuche / Mandy Keck ; Gutachter: Rainer Groh, Jens Geelhaar, Thomas Schlegel ; Betreuer: Rainer Groh." Dresden : Thelem Universitätsverlag & Buchhandlung, 2019. http://d-nb.info/1226901395/34.

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Keck, Benjamin [Verfasser], and Joachim [Akademischer Betreuer] Hornegger. "High Performance Iterative X-Ray CT with Application in 3-D Mammography and Interventional C-arm Imaging Systems / Benjamin Keck. Gutachter: Joachim Hornegger." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2014. http://d-nb.info/1065045743/34.

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Herwig, André. "Der Gestaltungsspielraum des nationalen Gesetzgebers bei der Umsetzung von europäischen Richtlinien zum Verbrauchervertragsrecht : Wechselwirkungen zwischen Rechtsharmonisierung und der "Keck"-Rechtsprechung des Europäischen Gerichtshofs /." Frankfurt am Main [u.a.] : Lang, 2002. http://www.gbv.de/dms/spk/sbb/recht/toc/334724309.pdf.

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Keck, Daniel [Verfasser], Erich [Akademischer Betreuer] [Gutachter] Starauschek, Yvonne [Akademischer Betreuer] Kammerer, and Peter [Gutachter] Gerjets. "Über das Erkennen fachlicher Widersprüche in internetbasierten Physiktexten und die Nutzung von Physik-Internetforen / Daniel Keck ; Gutachter: Erich Starauschek, Peter Gerjets ; Erich Starauschek, Yvonne Kammerer." Ludwigsburg : Pädagogische Hochschule Ludwigsburg, 2015. http://d-nb.info/1117812502/34.

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Kliem, Martina [Verfasser], and Annette [Akademischer Betreuer] Keck. "Das Zeit-Wissen medizinisch-psychologischer Fallgeschichten um 1800 : epistemische Schreibweisen bei Marcus Herz, Christian Heinrich Spieß und Heinrich von Kleist / Martina Kliem ; Betreuer: Annette Keck." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2017. http://d-nb.info/1142787508/34.

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Wallrapp, Corinna [Verfasser], Heiko [Akademischer Betreuer] Faust, Heiko [Gutachter] Faust, and Markus [Gutachter] Keck. "Governance systems of yarshagumba collection and trade in the border region of India, Nepal and China / Corinna Wallrapp ; Gutachter: Heiko Faust, Markus Keck ; Betreuer: Heiko Faust." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/118802518X/34.

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Shekarriz, Foumani Jasmin [Verfasser], Tobias [Akademischer Betreuer] Keck, and Henning [Akademischer Betreuer] Wittenburg. "Entwicklung und Evaluation einer elektronischen evidenz-basierten Entscheidungs-Unterstützungssoftware (MEBDAS®) zur Indikationsüberprüfung der Duodenopankreatektomie beim Pankreaskarzinom / Jasmin Shekarriz Foumani ; Akademische Betreuer: Tobias Keck, Henning Wittenburg." Lübeck : Zentrale Hochschulbibliothek Lübeck, 2021. http://d-nb.info/123150448X/34.

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Shekarriz, Foumani Sarah [Verfasser], Tobias [Akademischer Betreuer] Keck, and Christian [Gutachter] Elsner. "Vergleich der konservativen und chirurgischen Therapie der abszedierten Appendizitis unter medizinischen und gesundheitsökonomischen Aspekten : Eine retrospektive Multicenterstudie / Sarah Shekarriz Foumani ; Gutachter: Christian Elsner ; Akademischer Betreuer: Tobias Keck." Lübeck : Zentrale Hochschulbibliothek Lübeck, 2020. http://d-nb.info/1208741128/34.

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Kratzsch, Claudia [Verfasser], Heidi [Akademischer Betreuer] Krömker, Jochen [Akademischer Betreuer] Seitz, and Frank [Akademischer Betreuer] Keck. "Entwicklung eines Modells zur fahrerzentrierten Beschreibung der Integralen Fahrzeugsicherheit. Fallstudie : Car-to-Car und Car-to-Infrastructure Kommunikation / Claudia Kratzsch. Gutachter: Jochen Seitz ; Frank Keck. Betreuer: Heidi Krömker." Ilmenau : Universitätsbibliothek Ilmenau, 2011. http://d-nb.info/101656368X/34.

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Keck, Johanna [Verfasser], Kathleen [Gutachter] Wermke, and Wafaa [Gutachter] Shehata-Dieler. "Pilotuntersuchung zur Anwendbarkeit einer Phonations-Artikulations-Interaktionsanalysemethode zur Charakterisierung artikulatorischer Mechanismen in kanonischen Babbellauten von Säuglingen mit hochgradiger sensorineuraler Hörminderung / Johanna Keck ; Gutachter: Kathleen Wermke, Wafaa Shehata-Dieler." Würzburg : Universität Würzburg, 2018. http://d-nb.info/1154386724/34.

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Dao, Trong Hung [Verfasser], Daniela [Akademischer Betreuer] Sauer, Daniela [Gutachter] Sauer, and Markus [Gutachter] Keck. "Management Options for Optimizing Nutrient Cycling and Reducing Greenhouse Gas Emissions from Smallholder Rice Farms in Vietnam / Hung Dao Trong ; Gutachter: Daniela Sauer, Markus Keck ; Betreuer: Daniela Sauer." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1200209222/34.

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Hung, Dao Trong [Verfasser], Daniela [Akademischer Betreuer] Sauer, Daniela [Gutachter] Sauer, and Markus [Gutachter] Keck. "Management Options for Optimizing Nutrient Cycling and Reducing Greenhouse Gas Emissions from Smallholder Rice Farms in Vietnam / Hung Dao Trong ; Gutachter: Daniela Sauer, Markus Keck ; Betreuer: Daniela Sauer." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://d-nb.info/1200209222/34.

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Lehmann, Torsten [Verfasser], Albrecht [Akademischer Betreuer] Stier, Tobias [Gutachter] Keck, Albrecht [Gutachter] Stier, and Alexandra [Gutachter] Busemann. "Evaluation einer präoperativen Checkliste zur Erfassung des individuellen Risikoprofils von Patienten hinsichtlich der kardialen Komplikationen bei viszeralchirurgischen Eingriffen / Torsten Lehmann ; Gutachter: Tobias Keck, Albrecht Stier, Alexandra Busemann ; Betreuer: Albrecht Stier." Greifswald : Universität Greifswald, 2020. http://d-nb.info/1216242623/34.

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Lehmann, Torsten [Verfasser], Albrecht Wilhelm [Akademischer Betreuer] Stier, Tobias Gutachter] Keck, Albrecht [Gutachter] Stier, and Alexandra [Gutachter] [Busemann. "Evaluation einer präoperativen Checkliste zur Erfassung des individuellen Risikoprofils von Patienten hinsichtlich der kardialen Komplikationen bei viszeralchirurgischen Eingriffen / Torsten Lehmann ; Gutachter: Tobias Keck, Albrecht Stier, Alexandra Busemann ; Betreuer: Albrecht Stier." Greifswald : Universität Greifswald, 2020. http://nbn-resolving.de/urn:nbn:de:gbv:9-opus-39055.

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49

Keck, Michaela-Kristina [Verfasser], and Lutz [Akademischer Betreuer] Graeve. "Functional validation of genetic changes discovered in high-throughput mutational and copy number screens with respect to carcinogenesis and treatment sensitivity for Head and Neck Cancer / Michaela-Kristina Keck. Betreuer: Lutz Graeve." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2016. http://d-nb.info/1103021834/34.

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50

Gharaibeh, Ahmed. "Environmental impact assessment on oil shale extraction in Central Jordan." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2017. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-226424.

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Abstract:

This study focuses on the environmental impact assessment of trace elements concentrations in spent shale, which is the main residual besides gas and steam from the utilization of oil shale. The study area El-Lajjun covers 28 km2, located in the centre of Jordan approximately 110 km south of Amman. It belongs mainly to the Wadi Mujib catchment and is considered to be one of the most important catchments in Jordan. The Wadi El-Lajjun catchment area (370 km2) consists of two main aquifer systems: The intermediate aquifer (Amman Wadi As Sir Aquifer or B2/A7) and the deep sandstone aquifer (Kurnub/Ram Group Aquifer). The B2/A7 aquifer (Upper Cretaceous) is considered as the main source of fresh water in Jordan. El-Lajjun oil shale was deposited in a sedimentary basin and comprises massive beds of brown-black, kerogen-rich, bituminous chalky marl. The oil shale was deposited in shallow marine environment. It is by definition a sedimentary rock containing organic material in the rock matrix. The shale oil extraction is an industrial process to decompose oil shale and to convert the kerogen into shale oil by hydrogenation, pyrolysis or by a thermal dissolution. Several classifications of extraction technologies are known; the classification with respect to the location where the extraction takes place distinguishes between off-site, on-site, and in situ. The oil shale utilization may have serious repercussions on the surrounding environment if these issues are not investigated and evaluated carefully. Ten representative oil shale rock samples with a total weight about 20 kg were collected from different localities of oil shale exposures in the study area. A standardized laboratory Fischer Assay test was performed with the samples to determine oil shale characteristics and to obtain spent shale, which was used in this study for further investigations. Sequential extraction was used to evaluate the changes in the mobility and distribution of the trace elements: Ti, V Cr, Co, Zn, As Zr, Cd, Pb and U. Column leaching experiments were performed to simulate the leaching behavior of the above elements from oil shale and spent shale to evaluate the possible influence on the groundwater in the study area. The concentrations in the leachate were below the maximum contaminant levels of the Environmental Protection Agency (EPA) for drinking water and the Jordanian standards for drinking water. An immobilization method by using Kaolin was applied to reduce the mobilization and bioavailability of the trace elements fraction that are contained in the spent shale. Immobilization was evaluated as a function of liquid-solid ratio (solid-liquid partitioning) and as a function of pH. A comparison between the results obtained from column leaching experiments and the results that were obtained from immobilization for the oil shale and spent shale samples indicated that the immobilization reduced the mobility of the trace element except for Ti, V, and Cr. However, even the concentrations of these elements were lower than the maximum acceptable limits of the Jordanian Standard Specifications for waste water. The catchment of the study area (Wadi El-Lajjun catchment) is ungauged. Therefore, the soil conservation service (SCS) runoff curve number method was used for predicting direct runoff from rainfall. The results obtained showed that the infiltration of water is very small (approximately 0.6 cm/year) and rarely can´t reach the groundwater through the oil shale beds. Thus, a contamination of groundwater is unlikely under normal conditions. DRASTIC was used to assess groundwater vulnerability for the B2/A7 aquifer with respect to pollution by oil shale utilization. The aquifer vulnerability map shows that the area is divided into three zones: low (risk index 10-100; intermediate (risk index 101–140) and high groundwater vulnerability (risk index 141-200). The high risk areas are small and mainly located in the northeastern corner of the El-Lajjun graben, where the hydraulic conductivity is relatively high and rocks are highly fractured and faulted. The water table of the deep sandstone aquifer (Kurnub/Ram group) in the El-Lajjun area is relatively deep. At least two geological formations above the Kurnub aquifer are aquitards and protect the deep aquifer. However, the area is highly fractured and thus there is a certain possibility for contact with surface pollutants. Finally, further research with respect to trace elements including REE elements and isotopes in the intermediate and deep sandstone aquifers are highly recommended. Isotopic signatures will be very helpful to investigate to which extend hydraulic connections between the aquifers exist. Further and in particular mineralogical studies on the spent shale and the possibilities for industrial utilization are recommended because huge quantities of spent shale are expected. Because most oil shale extraction technologies especially the power generation require considerable amounts of water detailed studies on water supply for the oil shale treatment have to be performed.

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