Within this past decade, advances in spectropolarimetric analyses allowed mapping surface characteristics of nearby non-resolved stars with unique characteristics. In this study, we attempt mapping of the magnetic field structure and surface distribution of elements for such a star, the magnetic Ap star phi Dra. Using high-precision photometric data from TESS satellite, we improve its rotation period. Spectrum synthesis calculations allow compilation of a list of lines present in its spectrum. The resulting synthetic spectrum and observed NARVAL spectra are used to re-estimate element abundances. Least-squares deconvolved (LSD) intensity and circular polarisation profiles are then computed from a sample of 1260 metal lines. To determine which element(s) are most suitable for in-depth analysis, variability of LSD profiles is studied qualitatively for Fe, Cr and Si. The longitudinal magnetic field of phi Dra is calculated from LSD circular polarisation profiles. Stellar magnetic field maps and distributions of Fe concentration are derived through Zeeman Doppler Imaging (ZDI). The resulting maps of this study show five areas of high Fe concentrations, in the Northern stellar hemisphere. The magnetic field topology of phi Dra resulting from our analysis is that of an offset dipole with small quadrupole contributions. Our abundance and magnetic maps suggest correlation between high concentrations of Fe and high magnetic field strength. The field is primarily radial in 4 out of 5 such regions, contrary to theoretical expectations.

Yes / A new low-cost dual-segmented dielectric resonator (DR) antenna design is proposed for wideband applications in the X-band region. Two DRs coupled to an S-shaped slot introduce interesting features. The antenna performance was characterized in terms of the reflection coefficient, gain, and radiation pattern, and detailed simulation studies indicate excellent antenna performance from 7.66 GHz to 11.2 GHz (37.5% fractional bandwidth) with a maximum gain of 6.0 dBi at 10.6 GHz while the fabricated prototype has a matched bandwidth from 7.8 GHz to 11.85 GHz (41% fractional bandwidth) and maximum gain of 6dBi. The antenna is compact, size 1 x 0.83 x 0.327 time the wavelength at 10 GHz. The two DR segments may be located on the same side or on opposite sides of the substrate, giving respectively improved gain or more uniform field patterns. Experimental testing of the prototype performance showed reasonable agreement with the predicted performance.

Technologies such as direct broad cast satellite system (DBSS), Geosynchronous Earth Orbit (GEO) and Low Earth Orbit (LEO) satellite communications , global positioning system (GPS), high accuracy airborne navigation system and a large variety of radar systems demand for high level of antenna performance. Similar is the requirement for upcoming land based wireless systems such as cellular and indoor communication systems that is needed some more specific and additional features added to the antenna to compensate for the deficiencies encountered in system's performance. Though metallic antennas are capable enough to fulfil all the operational requirements, however at very high frequencies and under hostile temperature conditions they are constrained to face certain limitations. To avoid these constraints the performance of Dielectric Resonator Antennas (DRAs) is evaluated and their new applications are proposed. In the thesis, two types of antenna applications are sought :-First is for tracking and satellite applications that needs a larger aperture coverage in elevation plane. This coverage is realized with a good CP purity by proposing two ports dual linearly polarized DRA working at X-band. The DRA is excited by two orthogonal H-shaped aperture slots yielding two orthogonal polarizations in the broadside direction. A common impedance bandwidth of 5.9% and input port isolation of -35 dB are obtained. The broadside radiation patterns are found to be highly symmetric and stable with cross polarization levels -15dB or better over the entire matching frequency band. The maximum measured gain is found to be 2.5dBi at 8.4 GHz.- The 2nd type of antenna is a dual pattern diversity antenna to be used in the Body Area Network (BAN) context. This antenna combines a slot loop and DRA yielding broadside and end-fire radiation patterns respectively. Based upon the feeding techniques, the DG antenna is further divided into two categories one with planar feeds and the other with non-planar feeds (slot loop excited by planar CPW but DRA excited by vertical monopole) .Both types are successfully designed and measured upon body when configured into different propagation scenarios. The non-planar feeds antenna allows wider common impedance bandwidths than the planar feeds (4.95% vs 1.5%).In both cases, a maximum value of DG=9.5dB was achieved when diversity performance tests were carried out in rich fading environments. This value is close to the one (10 dB) theoretically reached in a pure Rayleigh environment and was obtained with efficiencies of 70% and 85% for the slot loop and the DRA respectively. Therefore, we conclude that these antennas could be used on the shoulders or the chest of professional clothes (firemen, policemen, soldier) where full planar integration is not a key issue but where the communication must be efficient in harsh environments and for various gestures, positions and scenarios

Dielectric resonator antenna (DRA) technologies are applicable to a wide variety of mobile wireless communication systems. The principal energy loss mechanism for this type of antenna is the dielectric loss, and then using modern ceramic materials, this may be very low. These antennas are typically of small size, with a high radiation efficiency, often above 95%; they deliver wide bandwidths, and possess a high power handling capability. The principal objectives of this thesis are to investigate and design DRA for low profile personal and nomadic communications applications for a wide variety of spectrum requirements: including DCS, PCS, UMTS, WLAN, UWB applications. X-band and part of Ku band applications are also considered. General and specific techniques for bandwidth expansion, diversity performance and balanced operation have been investigated through detailed simulation models, and physical prototyping. The first major design to be realized is a new broadband DRA operating from 1.15GHz to 6GHz, which has the potential to cover most of the existing mobile service bands. This antenna design employs a printed crescent shaped monopole, and a defected cylindrical DRA. The broad impedance bandwidth of this antenna is achieved by loading the crescent shaped radiator of the monopole with a ceramic material with a permittivity of 81. The antenna volume is 57.0  37.5  5.8 mm3, which in conjunction with the general performance parameters makes this antenna a potential candidate for mobile handset applications. The next class of antenna to be discussed is a novel offset slot-fed broadband DRA assembly. The optimised structure consists of two asymmetrically located cylindrical DRA, with a rectangular slot feed mechanism. Initially, designed for the frequency range from 9GHz to 12GHz, it was found that further spectral improvements were possible, leading to coverage from 8.5GHz to 17GHz. Finally, a new low cost dual-segmented S-slot coupled dielectric resonator antenna design is proposed for wideband applications in the X-band region, covering 7.66GHz to 11.2GHz bandwidth. The effective antenna volume is 30.0 x 25.0 x 0.8 mm3. The DR segments may be located on the same side, or on opposite sides, of the substrate. The end of these configurations results in an improved diversity performance.

Gegenstand dieser Studie ist eine Gruppe von acht Felsgräbern und zwei Schaftgräbern im Zentralbereich von Dra’ Abu el-Naga (Central Dra’ Abu el-Naga, CDAN) auf der thebaischen Westseite. Die Errichtung dieser Anlagen geht auf die Zeit des ägyptischen Neuen Reichs zurück, doch wurden sie über viele Generationen nach der Bestattung der ursprünglichen Grabinhaber weiter benutzt. Die Einleitung (Chapter 1) skizziert den Rahmen der Untersuchung und umfasst drei Teile: Zunächst werden Hintergrundinformationen zur geographischen Lage und physischen Gestalt des Fundareals geliefert. Schließlich werden Verlauf und aktueller Stand der Forschungen in CDAN skizziert. In folgenden Hauptkapitel (Chapter 2) werden die vom ägyptische Ministry of State of Antiquities (MSA) in dem Areal durchgeführten Ausgrabungen behandelt. Durch die Konzentration auf die Analyse der vorkommenden Architekturelemente und deren Einordnung in die in CDAN vorkommenden Stiltypen konnten unserem Wissen. Im dritten Hauptteil (Chapter 3) setze ich mich mit den Überbleibseln und Spuren der antiken Bestattungsgebräuche auseinander, also in erster Linie mit Objektgruppen auseinander. Im Letztem Hauptteil (Chapter 4) Wiederbenutzung der Grabanlagen in späteren Perioden. Abschließen wird die Bedeutung der neu entdeckten Grabanlagen für den Gesamtkontext der Archäologie von CDAN beleuchtet. Dabei haben sich neue Erkenntnisse zu den spezifischen Verwendungen und Funktionen sowie Nachverwendungen monumentaler Bestattungen in CDAN ergeben – gerade auch dadurch, dass sich der Betrachtungszeitraum vom Neuen Reich bis zur Moderne erstreckte und so unser Blick für die vielfältigen Bezugnahmen und Entwicklungen geschärft wurde. Die vier Hauptkapitel werden durch einen Katalog der behandelten Objekte ergänzt. / In this thesis, a group of eight rock cut tombs and two shaft-tombs located in Central Dra’ Abu el-Naga (CDAN) at the West Bank of Luxor were studied. The construction of these tombs dates mainly to the period of the New Kingdom (NK, c. 1550-1070 BCE), but they continued to be in use for many generations after the death of the original tomb owners. The framework of this study, as sketched in Chapter 1, is characterized by three approaches: the first section is titled The geographical and geological nature of DAN. The overview of The history of excavation at CDAN Finally, the focus is on the history of research on the necropolis of CDAN. In Chapter 2, the excavations conducted in the area by the Egyptian Ministry of State of Antiquities (MSA) are described. I described and discussed the architectural elements of the newly excavated tombs. At the end, the architectural styles that prevailed in the CDAN were described, as a step in clarifying the development of the history of the area. In Chapter 3, deals with the relics and traces of ancient burial customs, especially with the objects like statues, pottery, coffins, shanties, funerary cones, and other funerary equipment, which came to light during the excavations in the area. Particular attention was given to their dating. The last section, Chapter 4, the frequent re-use of the tombs in later periods, as illustrated, e.g., by ceramics and other small finds. At the end, the significance of the newly discovered tombs is highlighted. Further insights into the specific usages and functions of monumental tombs in CDAN in general were gained, and to increase the understanding of the connections, interrelationships and developments, this started from NK and ended to very modern time. The four main chapters are followed by a catalogue of objects.

Dielectric resonator antenna (DRA) technologies are applicable to a wide variety of mobile wireless communication systems. The principal energy loss mechanism for this type of antenna is the dielectric loss, and then using modern ceramic materials, this may be very low. These antennas are typically of small size, with a high radiation efficiency, often above 95%; they deliver wide bandwidths, and possess a high power handling capability. The principal objectives of this thesis are to investigate and design DRA for low profile personal and nomadic communications applications for a wide variety of spectrum requirements: including DCS, PCS, UMTS, WLAN, UWB applications. X-band and part of Ku band applications are also considered. General and specific techniques for bandwidth expansion, diversity performance and balanced operation have been investigated through detailed simulation models, and physical prototyping. The first major design to be realized is a new broadband DRA operating from 1.15GHz to 6GHz, which has the potential to cover most of the existing mobile service bands. This antenna design employs a printed crescent shaped monopole, and a defected cylindrical DRA. The broad impedance bandwidth of this antenna is achieved by loading the crescent shaped radiator of the monopole with a ceramic material with a permittivity of 81. The antenna volume is 57.0  37.5  5.8 mm3, which in conjunction with the general performance parameters makes this antenna a potential candidate for mobile handset applications. The next class of antenna to be discussed is a novel offset slot-fed broadband DRA assembly. The optimised structure consists of two asymmetrically located cylindrical DRA, with a rectangular slot feed mechanism. Initially, designed for the frequency range from 9GHz to 12GHz, it was found that further spectral improvements were possible, leading to coverage from 8.5GHz to 17GHz. Finally, a new low cost dual-segmented S-slot coupled dielectric resonator antenna design is proposed for wideband applications in the X-band region, covering 7.66GHz to 11.2GHz bandwidth. The effective antenna volume is 30.0 x 25.0 x 0.8 mm3. The DR segments may be located on the same side, or on opposite sides, of the substrate. The end of these configurations results in an improved diversity performance. / General Secretariat of Education and Scientific Research Libya

AABBSSTTRRAACCTT The molecular circadian clock enables anticipation of environmental changes. In mammals, clocks are ubiquitously present in almost all tissues and they are comprised of transcriptional-translational feedback loops of the so-called clock genes. The central clock represents the intrinsic pacemaker which is located in suprachiasmatic nuclei (SCN) of hypothalamus and synchronizes peripheral clocks. Clockwork system in alimentary tract and its regulatory link to intestinal functions are poorly understood. Therefore the objective of the thesis was to characterize molecular clock in particular parts of the rat intestine and to elucidate its link to the intestinal transport, regulation of cell cycle and neoplastic transformation in colonic tissue. We used quantitative RT-PCR (qPCR) to determine circadian profiles of mRNA expression of clock genes in the epithelium of duodenum, jejunum, ileum, and colon of rat. Furthermore, we analysed the expression of genes coding sodium chloride transporters and channels as well as cell cycle regulators in colon. To focus more precisely on different structures of intestinal epithelia we used laser capture microdissection. In addition, we performed Ussing chamber measurements to determine the colonic electrogenic transport. To study the contribution of circadian...

The current research study investigates the predictive value of two frequently-used benchmark reading assessments: Developmental Reading Assessment (DRA) and the Dynamic Indicators of Basic Early Literacy Skills (DIBELS). With an increasing emphasis on high-stakes testing to measure reading proficiency, benchmark assessments may assist in predicting end-of-year performance on high-stakes testing. Utah's high-stakes measurement of end-of-year reading achievement is the English Language Arts Criterion-Referenced Test (ELA-CRT). A Utah urban school district provided data for students who completed the DRA, DIBELS, and ELA-CRT in the 2005-2006 school year. The primary purpose of the study was to determine the accuracy to which the Fall administrations of the DRA and the DIBELS predicted performance on the ELA-CRT. Supplementary analysis also included cross-sectional data for the DIBELS. Results indicated that both Fall administrations of the DRA and the DIBELS were statistically significant in predicting performance on the ELA-CRT. Students who were high risk on the benchmark assessments were less likely to score proficiently on the ELA-CRT. Also, demographic factors did not appear to affect individual performance on the ELA-CRT. Important implications include the utility of data collected from benchmark assessments to address immediate interventions for students at risk of failing end-of-year, high-stakes testing.

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The overarching aim of the studies in this dissertation is to contribute knowledge about children’s shared social knowledge in their preschool peer cultures, regarding both content and how it is established and maintained. An ethnographic approach has been used to study the shared activities of children, aged 3-5, in the preschool. During 1 ½ years, one preschool setting was visited on a regular basis. One hundred hours of observation have been made and documented through video camera recordings and field notes. The theory of children’s peer cultures (Corsaro, 2005), positioning theory (Harré & Langenhove, 1999a) and social representation theory (Moscovici, 2001) have been used as theoretical tools in the analyses. The empirical results are presented in four articles (articles I-IV) and are all illustrations of the children’s shared social knowledge. The findings are that children’s shared social knowledge involves two main aspects of knowledge about relations; how to establish and maintain relations vis-à-vis various tokens or social resources (articles III and IV), and how to create distance to relations (articles I and II). Another find is that there seems to be a tension between the children’s social knowledge and the social norms explicitly formulated in the studied preschool context. / I den här avhandlingen undersöker Lovisa Skånfors barns sociala vardagsliv i förskolan. Det specifika syftet är att bidra med kunskap om barns gemensamma sociala kunskaper i förskolans kamratkulturer, både vad gäller dess innehåll och hur de etableras och upprätthålls. Författaren har genom ett etnografiskt arbetssätt följt barns gemensamma aktiviteter på en 3-5-årsavdelning i en svensk förskola, under 1,5 år. Resultatet visar att barns gemensamma sociala kunskaper handlar om hur man kan skapa och upprätthålla relationer och hur man kan distansera sig från relationer. Barns sociala relationer skapas och upprätthålls i relation till olika sociala resurser (rätt ålder, specifika kompetenser och tidigare etablerade relationer). Barn skapar dessutom distans till andra barn och vuxna genom att på olika sätt dra sig undan i förskolekontexten. Resultatet visar också att det tycks finnas en spänning mellan barnens gemensamma sociala kunskaper och de normer om kollektivitet som explicit formuleras i den studerade förskolekontexten. Avhandlingen vänder sig till forskare och praktiker med intresse för frågor kring förskola och förskolebarns sociala samspel.