205 research outputs found
All-optical TDM data demultiplexing at 80 Gbit/s with significant timing jitter tolerance using a fiber Bragg grating based rectangular pulse switching technology
No full textWe demonstrate the use of fiber Bragg grating based pulse-shaping technology to provide timing jitter tolerant data demultiplexing in an 80 Gb/s all-optical time division multiplexing (OTDM) system. Error-free demultiplexing operation is achieved with ~6 ps timing jitter tolerance using superstructured fiber Bragg grating based 1.7 ps soliton to 10 ps rectangular pulse conversion at the switching pulse input to a nonlinear optical loop mirror (NOLM) demultiplexer comprising highly nonlinear dispersion shifted fiber (HNLF). A 2-dB power-penalty improvement is obtained compared to demultiplexing without the pulse-shaping grating. <br/
Risicomanagement is een keuze
No full textOnderzoek door middel van casestudy’s naar de blokkades voor het implementeren van expliciet risicomanagement bij middelgrote woningcorporaties.Design and Construction ManagementReal Estate and HousingArchitectur
Descent and cyclotomic redshift for chromatically localized algebraic K-theory
Get PDFWe prove that -localized algebraic -theory satisfies descent for -finite -group actions on stable -categories of chromatic height up to , extending a result of Clausen-Mathew-Naumann-Noel for finite -groups. Using this, we show that it sends -local Galois extensions to -local Galois extensions. Furthermore, we show that it sends cyclotomic extensions of height to cyclotomic extensions of height , extending a result of Bhatt-Clausen-Mathew for . As a consequence, we deduce that -localized -theory satisfies hyperdescent along the cyclotomic tower of any -local ring. Counterexamples to such cyclotomic hyperdescent for -localized -theory were constructed by Burklund, Hahn, Levy and the third author, thereby disproving the telescope conjecture.68 pages, final versio
Benchmarking of a battery loader and its impact on the Garpenberg mine
No full textApplied Earth Sciences | European Mining Cours
Temporal histories of Cordilleran continental arcs: Testing models for magmatic episodicity
Get PDFMagmatic activity in continental arcs is known to vary in a non-steady statemanner, the mechanisms for which are a matter of ongoing discussion. Ofparticular importance is the question to what extent episodic magmatism incontinental arcs is governed by external factors (e.g., plate motions) and internal factors (e.g., feedback processes in the upper plate). In order to test existing models for magmatic episodicity, which are mostly based on temporally and spatially limited records, this study uses large datasets of geochronological, geochemical, and plate kinematic data to document the Paleozoic to Mesozoic development of the Cordilleran orogen in eight transects from British Colombia to Patagonia. The temporal distribution of U/Pb bedrock and detrital zircon ages, used as a proxy for timing of magmatic accretion, shows that some minima and maxima are nearly synchronous for thousands of km along the arc. Some age patterns are characterized by a periodicity of 50?80 Ma, suggesting a cyclic controlling mechanism. Other magmatic lulls or flare-ups find no equivalent in adjacent sectors, indicating that either discrete events or variable lag times also may be important in governing magmatic activity in continental arcs. Magma composition in Mexico, the Peninsular Ranges, and the Sierra Nevada varies episodically and proportionally with the temporal record of arc activity. During flare-up events, there is an increase in Sm/Yb, indicating deeper melting, and a decrease in εNdi, suggesting a higher degree of crustal assimilation. Geochemical scatter also increases during the initiation of flare-up events. Plate kinematic data provide a means of evaluating mantle heat input. The correlation between plate convergence rate and magmatic accretion varies for each sector, suggesting that different flare-ups or lulls likely reflect variable combinations of processes.Fil: Kirsch, Moritz. Technische Universität Bergakademie Freiberg; AlemaniaFil: Paterson, Scott R.. University of Southern California; Estados UnidosFil: Wobbe, Florian. Alfred Wegener Institute; AlemaniaFil: Martínez Ardilla, Ana María. Loma Linda University; Estados UnidosFil: Clausen, Benjamin L.. Loma Linda University; Estados UnidosFil: Alasino, Pablo Horacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Universidad Nacional de Catamarca. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Secretaría de Industria y Minería. Servicio Geológico Minero Argentino. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja. - Provincia de La Rioja. Centro Regional de Investigaciones Científicas y Transferencia Tecnológica de La Rioja; Argentin
Segment number threshold determines juvenile onset of germline cluster expansion in Platynereis dumerilii
Get PDF© The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Kuehn, E., Clausen, D. S., Null, R. W., Metzger, B. M., Willis, A. D., & Ozpolat, B. D. Segment number threshold determines juvenile onset of germline cluster expansion in Platynereis dumerilii. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, (2021.): 1-16, https://doi.org/10.1002/jez.b.23100.Development of sexual characters and generation of gametes are tightly coupled with growth. Platynereis dumerilii is a marine annelid that has been used to study germline development and gametogenesis. P. dumerilii has germ cell clusters found across the body in the juvenile worms, and the clusters eventually form the gametes. Like other segmented worms, P. dumerilii grows by adding new segments at its posterior end. The number of segments reflect the growth state of the worms and therefore is a useful and measurable growth state metric to study the growth-reproduction crosstalk. To understand how growth correlates with progression of gametogenesis, we investigated germline development across several developmental stages. We discovered a distinct transition period when worms increase the number of germline clusters at a particular segment number threshold. Additionally, we found that keeping worms short in segment number, by manipulating environmental conditions or via amputations, supported a segment number threshold requirement for germline development. Finally, we asked if these clusters in P. dumerilii play a role in regeneration (as similar free-roaming cells are observed in Hydra and planarian regeneration) and found that the clusters were not required for regeneration in P. dumerilii, suggesting a strictly germline nature. Overall, these molecular analyses suggest a previously unidentified developmental transition dependent on the growth state of juvenile P. dumerilii leading to substantially increased germline expansion.Research reported in this publication was supported by the National Institute of General Medical Sciences of the National Institutes of Health under Award Number R35GM138008 (to BDÖ) and R35GM133420 (to ADW) and Hibbitt Startup Funds (to BDÖ)
Critical Flow – Towards a Construction Flow Theory
No full textThis paper introduces the concept of Construction Physics as a more comprehensive way of understanding the construction process from a flow perspective. It establishes a preliminary definition of the term and investigates briefly the present knowledge, flow models and methods for their management. From this it argues that the state of the art does not fully cover the whole process and proposes a holistic view of the flow of all prerequisites feeding the process. It introduces the key term Critical Flow and concludes by recommending areas that should be investigated as a joint IGLC research, development and testing programme
Using imagery to solve spatial problems
No full textThis report focuses on the use of imagery to solve a range of spatial problems. The research projects reviewed in this report offer some insight into the range of strategies used by solvers of spatial problems and point to relationships between spatial and verbal skills
User adoption of a CRM-based information system within a financial services organisation: An empirical analysis
No full textFinancial Services firms require processes and systems which can support and maintain customer-related information for the purposes of core business-focussed activity. Specifically within the investment banking sector, the importance and criticality of such customer information underpins the firm’s ability to transact sales, trading and other advisory-based services in an efficient and relevant manner. The design and development of Customer Relationship Management (CRM) systems to address the given external vs. internal customer information touchpoints, therefore provides a vital link between financial services professionals, client data and business processes. In doing so, the input of CRM user requirements is a key step in deriving benefit from such a technology solution. This paper henceforth identifies and details user requirements and experiences of such an information system within a case study company and highlights pertinent issues for the adoption of such systems within the given secto
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