1,783 research outputs found
Infrared ship signature analysis and optimisation
No full textThe last decade has seen an increase in the awareness of the infrared signature of naval ships. New ship designs show that infrared signature reduction measures are being incorporated, such as exhaust gas cooling systems, relocation of the exhausts and surface cooling systems. Hull and superstructure are cooled with dedicated spray systems, in addition to special paint systems that are being developed for optimum stealth. This paper presents a method to develop requirements for the emissivity of a ship's coating that reduces the contrast of the ship against its background in the wavelength band or bands of threat sensors. As this contrast strongly depends on the atmospheric environment, these requirements must follow from a detailed analysis of the infrared signature of the ship in its expected areas of operation. Weather statistics for a large number of areas have been collected to produce a series of 'standard environments'. These environments have been used to demonstrate the method of specifying coating emissivity requirements. Results are presented to show that the optimised coatings reduce the temperature contrast. The use of the standard environments yields a complete, yet concise, description of the signature of the ship over its areas of operation. The signature results illustrate the strong dependence of the infrared signature on the atmospheric environment and can be used to identify those conditions where signature reduction is most effective in reducing the ship's susceptibility to detection by IR sensors
Upper mantle structure from body-wave coda and amplitudes
No full textThe last decade has seen a large increase in the amount of high-quality data from a growing
number of digitally operating seismic stations. Both short- and long-period data are
reported on a regular basis to central data centres. As global seismology is hampered by the
unequal distribution of stations and earthquakes, extracting as much as possible information
from the available data is important. However, only a relatively small part of the growing
data volume is used on a more or less routine basis. New sources of information from the
seismogram may add independent constraints on and provide a higher resolution of Earth
structure.
The most widely used parts of the seismogram are the P-wave travel time and the longperiod
surface wave train. The travel time of the (mostly short-period) P-wave is used on a
large scale to invert for Earth structure (Spakman 1991; Vandecar 1991; Van der Hilst &
Engdahl 1991), Recently, also the S-wave travel time is used in tomographic inversions
(e.g., Zielhuis 1988). On the low-frequency end of the spectrum, long-period surface wave
forms are inverted for mantle velocity structure (e.g., Woodhouse & Dziewonski 1984;
Snieder 1988). Recent studies include the long-period S-waves in the wave form modeling
using modal summation (Nolet 1990: Zielhuis 1992). The results of Li & Tanimoto (1991)
show that it is still prohibitively time-eonsuming to include also the long-period P-wave in
this process.
This leaves large parts of the seismogram unused in inversion procedures. Before these
can be included in any inversion process, their information content and relation to Earth
structure must be established (e.g.• wave propagation in a laterally homogeneous or heterogeneous
Earth model). The main goal of the research presented in this thesis is to determine
the information content of parts of the seismogram that are not frequently used and, if
possible, to develop methods to extract this information
Filip Spannbrucker
No full textFilip Spannbrucker Filip Spannbrucker, česká barokní architektura, hrabě František Josef Schlik, Jean Baptiste Mathey, Jičínsko The main aim of this thesis is to present the life and work of Filip Spannbrucker (approximately 1672?1729), Prague architect and builder, in the context of contemporary artistic and social course of events. In the first part of this work there will be outlined Spannbrucker's life and professional career based on elaborate archival research. Special attention will be devoted to proprietors and a patronage of building projects wherein Spannbrucker participated or whereof was an author. In the connection, his work will be brought in contiguity of contemporaneous cultural, socioeconomical and aesthetical notions and relations. In the second part of this thesis there will be pointed out a characteristic and spring of inspiration of Spannbrucker's architecture by means of an accurate formal analysis. Final part will be a catalog of Filip Spannbrucker's works. Filip Spannbrucker, Czech baroque architecture, count František Josef Schlik, Jean Baptiste Mathey, region of Jičí
Location-Based Discovery and Network Handover Management for Heterogeneous IEEE 802.11ah IoT Applications
No full textThis research was funded by the Flemish IDEAL-IoT project (FWO SBO, grant nr. S004017N). The author Serena Santi is funded by the Flemish FWO SB grant (nr. 1S82120N). The author Filip Lemic was supported by the EU MSCA grant (nr. 893760). The computational resources were provided by the VSC (Flemish Supercomputer Center), funded by FWO and the Flemish Government -department EWI
Ship transport of CO2 – breaking the CO2-EOR deadlock
No full textAbstractThe North Sea contains the larger part of the storage capacity in North West Europe. Countries around the North Sea currently focus their attention on developing that capacity for the CCS demonstration projects. It is generally assumed that a second wave of CCS projects will further develop storage in the North Sea. However, a major hurdle is the development of long-distance pipelines. A requirement for the construction of a ‘backbone’ pipeline is the availability of a sufficient volume of CO2, with a firm commitment on the duration of supply of CO2. Especially for EOR purposes a CO2 pipeline is not attractive, due to continuously decreasing demand for CO2 after an initial peak.Transport by ship can provide a solution, because of its inherent flexibility in combining CO2 from several sources, each too small to warrant a pipeline, to one or more storage locations. This paper describes the case for ship transport of CO2 to North Sea oil fields, especially in the early phases of the development of CCS in Europe, providing the cross-benefit that will increase the lifetime of oil fields and, at the same time, provide the required commercial case for CO2 capture and transport. This will help develop CCS industry, which will help EU Member States to meet their CO2 emission reduction targets
Modular System for Distributed User Data Management
No full textTitle: Modular System for Distributed User Data Management Author: Filip Pavliš, Author's email: [email protected] Department: Department of Distributed and Dependable Systems Supervisor: Mgr. Pavel Ježek, Department of Distributed and Dependable Systems Abstract: The main objective of this project was to create a multiplatform modular system for distributed data management. The system supports both local and remote accessible data storage. Therefore a part of the solution is also a server for remote data access. System also provides parallel usage of a local and remote storage which guarantees that the storage is accessible also when connection to server is lost. In this case, system is capable to synchronize changes between the server and a client. A client can use multiple instances of his storage and our system is able to synchronize them through central server. The system provides abstraction over data model to separate plugin developers from its specific behavior. As practical preview of system usability was created an extension application called TuaLoca. The application will contain implementation of preview plugins and basic user interaction. Keywords: Distributed Data Management, Modular system, Synchronization on the SQL Queries Level, Distributed Solution for Interface LIN
Heritage book from Mircea Filip collection
No full textMircea Filip collection were integrated in the Scientific Library in 2016. It contains patrimony of great importance. The author invites readers to an exciting journey into the world of books, gathered in a life of Man, to discover together their charm and wisdom, the spirit of the characters created in different time spaces. True biblical values have today become the books on which the dedication or Ex-Libris of the author is preserved
Ignác Filip Semmelweis - his life and contribution to obstetrics
No full textAuthor: Anežka Pikmanová Institution: Charles University, Faculty od Medicine in Hradec Králové, Department of Non-medical Studies Title: Ignác Filip Semmelweis - his life and contribution to obstetrics Supervisor: doc. PhDr. Jana Kutnohorská, CSc. Number of pages: 73 Number of attachements: 1 Year od defense: 2025 Keywords: Ignác Filip Semmelweis, obstetrics in the 18th and 19th centuries, puerperal fever, mothers, midwives, obstetricians, obstetric education, obstetric clinics, prevention, treatment, hygiene measures, death The bachelor thesis is about the life of Ignác Filip Semmelweis and his contribution to obstetrics. The thesis consists of a theoretical and an empirical part. The theoretical part focuses on obstetrics in the 18th and 19th centuries, the life of Ignác Filip Semmelweis - his childhood, studies, work at the Klein clinic in Wien, Semmelweis' discovery, publishing activities, his work at the Saint Roch Hospital in Pest and the end of his life. The empirical part deals with the analysis of a survey that focused on the awareness of the professional public (students of general nursing, certified general nurse, midwifery, pediatric nurse) about Ignác Fillip Semmelweis and his professional activity. The survey was participated by students of Faculty of Medicine in Hradec Králové and..
Filip Buonaccorsi Kallimach „De legitimo amore”
No full textThe article is an analysis of three works by Filip Kallimach (Filippo Buonaccorsi) regarding marriage (elegy XXII, Epithalamium Fanniae ac Musaei, carmen Ad se ipsum). In the collections of Roman elegies from the Augustian era, there are no wedding pieces. The source of Callimachus’ idea is found by the author of the article in Epithalamium in Stellam et Violentillam by P. Papinius Statius and, indirectly, through the epithalamium of Statius – in the unpreserved elegies of L. Arruntius Stella, a poet of Domitian times.The article is an analysis of three works by Filip Kallimach (Filippo Buonaccorsi) regarding marriage (elegy XXII, Epithalamium Fanniae ac Musaei, carmen Ad se ipsum). In the collections of Roman elegies from the Augustian era, there are no wedding pieces. The source of Callimachus’ idea is found by the author of the article in Epithalamium in Stellam et Violentillam by P. Papinius Statius and, indirectly, through the epithalamium of Statius – in the unpreserved elegies of L. Arruntius Stella, a poet of Domitian times
Options for CO2 sequestration in Kuwait
No full textIn preparation for future requirements to abate CO2 emission levels, a CO2 storage feasibility study was carried out for the country of Kuwait. At present, no definite plans exist to install capture facilities at the larger emission points in the country; the study presented is one of the first steps to prepare the country for a low-carbon future. The first step was to investigate formations for potential CO2 storage capacity in a country-wide screening. Two regions within Kuwait were shortlisted for subsequent evaluation; one site was selected for detailed characterization and assessment. The main result of the study was that the Kra Al-Maru Trend is likely to be a first-class CO2 storage site. Pending verification of the findings we conclude that the Kra Al-Maru Trend provides the storage capacity of at least 440 Mt, which is equivalent to the CO2 produced in a period of 40 years by the Doha East and Doha West power plants combined. The subsurface of the Kra Al-Maru Trend can store this CO2 at the rate that is currently emitted to the atmosphere by the two power plants. No showstoppers were discovered to safe and secure storage of CO2. Storing CO2 in the subsurface of the Kra Al-Maru Trend offers the possibility of future back-production of the CO2 stored. Verification of these conclusions is required, through a dedicated appraisal well that targets the Cretaceous interval at depths between about 2000 m and 3000 m (6000 - 9000 ft)
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