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Physical Dimensions (physical + dimension)
Selected AbstractsImpact of Huntington's disease on quality of lifeMOVEMENT DISORDERS, Issue 2 2001D.I. Helder MA Abstract The purpose of this study was to systematically assess the impact of Huntington's disease (HD) on patients' health-related quality of life (QOL). Seventy-seven patients with a clinically confirmed diagnosis of HD were interviewed by means of the Sickness Impact Profile (SIP). Additional data were gathered on patients' motor performance by means of the motor section of the Unified Huntington Disease Rating Scale (UHDRS), and cognitive performance by means of the Mini-Mental State (MMS). Patients had high scores on the SIP subscales, indicating moderate to severe functional impairment. Total Motor Score (TMS), MMS scores, and the duration of HD were significantly correlated with patients' scores on the SIP, and predicted a significant amount of variance of the Physical Dimension of the SIP, but not of the Psychosocial Dimension. We conclude that HD has a great impact on patients' physical and psychosocial well-being, the latter being more severely affected. Implications for further research and clinical practice are discussed. © 2001 Movement Disorder Society. [source] A comprehensive study and modeling of centre-tap differentially driven single-turn integrated inductors for 10-GHz applicationsMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 3 2003S. F. Lim Abstract This paper presents a complete characterization of single-turn differentially driven high-quality (Q) factor inductors at 10 GHz. The separate characterization of individual physical dimension through a series of 3D electromagnetic (EM) simulations allows us to evaluate their effects on the inductor's Q and inductance L separately. The results show that single-turn inductors can generate Q greater than 20 at 10 GHz with inductance L at the sub-nano Henry range. Finally, a lumped-element equivalent circuit of the inductor was developed for predicting associated Q, L, and frequency behavior. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 38: 182,185, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11008 [source] 2. PRESENCE ACHIEVED IN LANGUAGE (WITH SPECIAL ATTENTION GIVEN TO THE PRESENCE OF THE PAST)HISTORY AND THEORY, Issue 3 2006HANS ULRICH GUMBRECHT ABSTRACT The aim of this essay is to ask whether what it calls the "presence" of things, including things of the past, can be rendered in language, including the language of historians. In Part I the essay adumbrates what it means by presence (the spatio-temporally located existence of physical objects and events). It also proposes two ideal types: meaning-cultures (in which the interpretation of meaning is of paramount concern, so much so that the thinghood of things is often obscured), and presence-cultures (in which capturing the tangibility of things is of utmost importance). In the modern period, linguistic utterance has typically come to be used for, and to be interpreted as, the way by which meaning rather than presence is expressed, thereby creating a gap between language and presence. Thus, in Part II the essay explores ways that this gap might be bridged, examining seven instances in which presence can be "amalgamated" with language. These range from instances in which the physical dimensions of language itself are made manifest, to those through which the physicality of the things to which language refers is supposed to be made evident. Of particular note for theorists of history are those instances in which things can be made present by employing the deictic, poetic, and incantatory potential of linguistic expression. The essay concludes in Part III with a reflection on Heidegger's idea that language is the "house of being," now interpreted as the idea that language can be the medium through which the separation of humans and the (physical) things of their environment may be overcome. The hope of achieving presence in language is no less than a reconciliation of humans with their world, including,and of most interest to historians,the things and events of their past. [source] MR angiography fusion technique for treatment planning of intracranial arteriovenous malformationsJOURNAL OF MAGNETIC RESONANCE IMAGING, Issue 3 2006Kiaran P. McGee PhD Abstract Purpose To develop an image fusion technique using elliptical centric contrast-enhanced (CE) MR angiography (MRA) and three-dimensional (3D) time-of-flight (TOF) acquisitions for radiosurgery treatment planning of arteriovenous malformations (AVMs). Materials and Methods CE and 3D-TOF MR angiograms with disparate in-plane fields of view (FOVs) were acquired, followed by k-space reformatting to provide equal voxel dimensions. Spatial domain addition was performed to provide a third, fused data volume. Spatial distortion was evaluated on an MRA phantom and provided slice-dependent and global distortion along the three physical dimensions of the MR scanner. In vivo validation was performed on 10 patients with intracranial AVMs prior to their conventional angiogram on the day of gamma knife radiosurgery. Results Spatial distortion in the phantom within a volume of 14 × 14 × 3.2 cm3 was less than ±1 mm (±1 standard deviation (SD)) for CE and 3D-TOF data sets. Fused data volumes were successfully generated for all 10 patients. Conclusion Image fusion can be used to obtain high-resolution CE-MRA images of intracranial AVMs while keeping the fiducial markers needed for gamma knife radiosurgery planning. The spatial fidelity of these data is within the tolerance acceptable for daily quality control (QC) purposes and gamma knife treatment planning. J. Magn. Reson. Imaging 2006. © 2006 Wiley-Liss, Inc. [source] New and accurate synthesis formulas for open supported coplanar waveguidesMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 2 2010S. Kaya Abstract In this article, new and accurate synthesis formulas to compute the physical dimensions of open supported coplanar waveguides (OS-CPWs) are presented. The synthesis formulas are obtained with the use of differential evolution (DE) and particle swarm optimization (PSO) algorithms. They are useful for the computer-aided design of OS-CPWs. The average percentage errors of the synthesis formulas obtained by using DE and PSO algorithms are computed to be 1.26% and 1.67%, respectively, for 4560 OS-CPW samples having different electrical parameters and physical dimensions, as compared with the results of quasi-static analysis. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 262,269, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24908 [source] Design of novel microstrip low-pass filter using defected ground structureMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 1 2008Petr Vágner Abstract A novel microstrip low-pass filter utilizing defected ground structure (DGS) units is presented in this article. A DGS unit is simulated with different physical dimensions in order to show variation of attenuation pole and cut-off frequency. Next, a low-pass filter using proposed DGS unit is designed. A method for determining dimensions of microstrip structure and DGS units is proposed. Influence of dimensions of the microstrip structure on filter characteristics is investigated and simulated. Filters of various orders are simulated as well. Selected filter is simulated and experimentally verified. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 10,13, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22982 [source] New and accurate synthesis formulas for multilayer homogeneous coupling structureMICROWAVE AND OPTICAL TECHNOLOGY LETTERS, Issue 10 2007Kerim Guney Abstract New, accurate closed-form formulas for the synthesis of multilayer homogeneous coupling structure (MHCS) are presented. They are obtained by using a differential evolution algorithm (DEA), and are useful for the computer-aided design (CAD) of MHCS. The average percentage error is found to be 0.38% for 1825 MHCS samples having different electrical parameters and physical dimensions, as compared with the results of the quasi-static analysis. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2486,2489, 2007; Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.22743 [source] Pollination by deceit in Paphiopedilum barbigerum (Orchidaceae): a staminode exploits the innate colour preferences of hoverflies (Syrphidae)PLANT BIOLOGY, Issue 1 2009J. Shi Abstract Paphiopedilum barbigerum T. Tang et F. T. Wang, a slipper orchid native to southwest China and northern Vietnam, produces deceptive flowers that are self-compatible but incapable of mechanical self-pollination (autogamy). The flowers are visited by females of Allograpta javana and Episyrphus balteatus (Syrphidae) that disperse the orchid's massulate pollen onto the receptive stigmas. Measurements of insect bodies and floral architecture show that the physical dimensions of these two fly species correlate with the relative positions of the receptive stigma and dehiscent anthers of P. barbigerum. These hoverflies land on the slippery centralised wart located on the shiny yellow staminode and then fall backwards through the labellum entrance. They are temporarily trapped in the inflated chamber composed of the interconnected labellum and column. The attractive staminode of P. barbigerum strongly reflects the colour yellow (500,560 nm), a colour preferred innately by most pollen-eating members of the Syrphidae. No scent molecules were detected using GC mass spectrometry analysis, showing that the primary attractant in this system is visual, not olfactory. Pollination-by-deceit in P. barbigerum is contrasted with its congener, P. dianthum, a brood site mimic that is pollinated by ovipositing females of E. balteatus. As the natural rate of fruit set in P. barbigerum (mean 26.3% pooled over three seasons) is lower than that of P. dianthum (mean 58.5% over two seasons), the evolution of false brood sites in some Paphiopedilum spp. should be selectively advantageous as they may provide an increase in the attention and return rates of dependable pollinators to flowers that always lack a reward. [source] Imagination , Einbildungskraft , Suggestion: Zur ,Scharlatanerie' in der neuzeitlichen Medizin,BERICHTE ZUR WISSENSCHAFTSGESCHICHTE, Issue 2 2004Heinz Schott Prof. Dr. med. Abstract In Renaissance and early modern times, the concept of imagination (Latin imaginatio) was essential for the (natural) philosophical explanation of magic processes, especially in the anthropology of Paracelsus. He assumed that imaginatio was a natural vital power including cosmic, mental, psychical, and physical dimensions. The Paracelsians criticized traditional humor pathology ignoring their theory of ,natural magic'. On the other hand, they were criticized by their adversaries as charlatans practicing ,black magic'. About 1800, in between enlightenment and romanticism, the healing concept of ,animal magnetism' (Mesmerism) evoked an analogous debate, whether ,magnetic' phenomena originated from a real (physical) power (so-called ,fluidum') or were just due to fantasy or imagination (German Einbildungskraft). At the end of the 19th century, the French internist Hippolyte Bernheim created , against the background of medical hypnosis (,hypnotism') as a consequence of Mesmerism , his theory of suggestion and autosuggestion: a new paradigm of psychological respectively psychosomatic medicine, which became the basis for the concept of ,placebo' in modern biomedicine. From now on, all the effects of ,alternative medicine' could easily be explained by the ,placebo-effect', more or less founded , at least unconsciously , on fraud. [source] Transmural flow bioreactor for vascular tissue engineeringBIOTECHNOLOGY & BIOENGINEERING, Issue 6 2009Jason W. Bjork Abstract Nutrient transport limitation remains a fundamental issue for in vitro culture of engineered tissues. In this study, perfusion bioreactor configurations were investigated to provide uniform delivery of oxygen to media equivalents (MEs) being developed as the basis for tissue-engineered arteries. Bioreactor configurations were developed to evaluate oxygen delivery associated with complete transmural flow (through the wall of the ME), complete axial flow (through the lumen), and a combination of these flows. In addition, transport models of the different flow configurations were analyzed to determine the most uniform oxygen profile throughout the tissue, incorporating direct measurements of tissue hydraulic conductivity, cellular O2 consumption kinetics, and cell density along with ME physical dimensions. Model results indicate that dissolved oxygen (DO) uniformity is improved when a combination of transmural and axial flow is implemented; however, detrimental effects could occur due to lumenal pressure exceeding the burst pressure or damaging interstitial shear stress imparted by excessive transmural flow rates or decreasing hydraulic conductivity due to ME compaction. The model was verified by comparing predicted with measured outlet DO concentrations. Based on these results, the combination of a controlled transmural flow coupled with axial flow presents an attractive means to increase the transport of nutrients to cells within the cultured tissue to improve growth (increased cell and extracellular matrix concentrations) as well as uniformity. Biotechnol. Bioeng. 2009; 104: 1197,1206. © 2009 Wiley Periodicals, Inc. [source] | |||||||||||||