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Search Results: 1 - 10 of 221 matches for " Celtic Stones "
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Whirl Interaction of a Drill Bit with the Bore-Hole Bottom  [PDF]
Nabil W. Musa, V. I. Gulyayev, L. V. Shevchuk, Hasan Aldabas
Modern Mechanical Engineering (MME) , 2015, DOI: 10.4236/mme.2015.53005
Abstract: This paper deals with the theoretic simulation of a drill bit whirling under conditions of its contact interaction with the bore-hole bottom rock plane. The bit is considered to be an absolutely rigid ellipsoidal body with uneven surface. It is attached to the lower end of a rotating elastic drill string. In the perturbed state, the bit can roll without sliding on the bore-hole bottom, performing whirling vibrations (the model of dynamic equilibrium with pure rolling when maximum cohesive force does not exceed the ultimate Coulombic friction). To describe these motions, a nonholonomic dynamic model is proposed, constitutive partial differential equations are deduced. With their use, the whirling vibrations of oblong and oblate ellipsoidal bits are analyzed, the functions of cohesive (frictional) forces are calculated. It is shown that the system of elastic drill string and ellipsoidal bit can acquire stable or unstable whirl modes with approaching critical Eulerian values by the parameters of axial force, torque and angular velocity. The analogy of the found modes of motions with ones of the Celtic stones is established. It is shown that the ellipsoidal bits can stop their whirling vibrations and change directions of their circumferential motions in the same manner as the ellipsoidal Celtic stones do. As this takes place, the trajectories of the oblate ellipsoidal bits are characterized by more complicated paths and irregularities.
Gallbladder Disorders Detected by Ultrasound  [PDF]
Hamad Elniel H. Eltyib, Adel M. Al-Garni, Saddig D. Jastaniah
Open Journal of Medical Imaging (OJMI) , 2014, DOI: 10.4236/ojmi.2014.42012
Patients who have disease of the biliary tract commonly present with acute right upper quadrant pain, nausea or vomiting, mid-epigastric pain, and/or jaundice. Etiologies include inflammation with or without infection, noninflammatory disorders, and benign or malignant neoplasms of the gallbladder or bile ducts. Ultrasound (US) is now accepted as the initial imaging modality of choice for the work-up of suspected biliary tract disease. A retrospective study was carried out at King Abdulaziz University Hospital to discuss the protocol of ultrasound scanning in demonstrating incidence and complication of Gall-bladder (GB) pathologies. Known cases of GB pathologies (100 patients) were surveyed by ultrasound using spatial digital iU22 Philips Convex probe 3.5 MHz. All patients were evaluated with ultrasonogphy following the international scanning guidelines and protocols. The age of the patients is between (9 - 90) years, 68 Patients (68%) were females and 32 patients (32%) were males. Range of age group of accumulation for gallstone presence was (35 - 50) years in females and above 50 years in males. Incidence of gallbladder pathologies are 59% (female 46% and 13% male). Incidence of gallstone is 37%, and ratio of incidence is between male to female 1:3. Other pathologies of gallbladder were found to be acute cholecystities 12%, chronic cholocystities 5%, sludge 2%, carcinoma of the Gall-bladder 1%, Gall-bladder polyps 1% and Emphysematous choleycystities 1%. Ultransonography is a single imaging modality sufficient for evaluation of patient with suspected gallbladder pathologies (gallstone) which can provide information about the presence of gallstone and more over about site and cause of biliary tract obstruction. Ultrasound is highly sensitive and specific means for diagnosis of the gallbladder disorders.
Os Celtas e os Cultos das águas: Cren as e Rituais
Filippo Louren?o Olivieri
Brathair , 2006,
Abstract: The aim of this work is to study the importance of the water cults in the Celtic Tradition. The rivers, springs, and lakes had main place in the religious ideology of the people with Celtic Culture. The wet places were the main way to access to the Other World and the Celts believed that lakes, pools and wells had magic power and healing virtues. The wet places are also associated with women.The ultimate discoveries have shown that the cults linked with water were present in the everyday life of the people in ancient Celtic Word. Therefore, the importance of studies on such subject. We will use the contribution of the Classic writers, of Archaeology and of the Celtic Mythology. Scholars like Mircea Eliade, Georges Dumézil and others will be important for our explanation.
Per l'interpretazione dell'etnonimo gallico Tectosages
Jacopo Garzonio
Studi Linguistici e Filologici Online , 2003,
Abstract: The Gaulish ethnic name Tectosages, lit. 'the ones seeking possessions', is traditionally explained referring it to the historical migrations of these people. However there are many reasons, also linguistic, to reject such a theory. The aim of this article is to propose an alternative hypothesis, based on the evidence got out of the Irish and Gaulish culture. It may be supposed that a name like Tectosages is related to an ancient social subdivision in age grades. Examples of similar habits can also be found in other Indo-European civilisations.
Mabinogion (portuguese translation)
Adriana Zierer
Brathair , 2001,
Abstract: review
Orígenes históricos, mitológicos y literarios de la Península Ibérica
Ramón Sainero
Brathair , 2007,
Abstract: We present the most recent inquiries on the origin of the Iberian peoples, as well as possible connections with Celtic literature and mythology.
As Mulheres, a Linhagem e a Magia no Mabinogion: Um Pólo de Alian as
M?nica Amim
Brathair , 2010,
Abstract: This paper presents an overview of female’s representation in the narratives of the Mabinogion. The different tales, taken as a whole, present us contradictory pictures of the female’s status in the Celticsocieties. These contradictions are probably due to the mix of Celtic groups to the people of the lands they conquered. The Celtic women, married or single, could play different functions including religious ones. Besides that, we should point out their important role as masters of weapons, of arts, of magic and as sexual initiators. This way, in this brief study we will try to discuss some aspects of the female’s role in the Celtic societies.
Outcome of Extracorporeal Shock Wave Lithotripsy in Western Region of Nepal
P Ghimire,N Yogi,GB Acharya
Nepal Journal of Medical Sciences , 2012, DOI: 10.3126/njms.v1i1.5787
Abstract: Background: Extracorporeal shock wave lithotripsy (ESWL) is an effective non-invasive method for management of urinary tract stones. It was introduced for the first time in Pokhara 1 year back. This study aims to study the efficacy of ESWL in removal of renal and ureteric calculus in relation to the stone size and location and potential adverse effect of the procedure. Methods: It is a prospective observational study carried out in 112 cases undergoing elective ESWL for solitary urolithiasis during a period of 1 year (August 2010- August 2011). Number of sessions required for successful fragmentation and clearance of stones were studied according to their size and position along with the complications encountered. Results: The success rate of ESWL was found to be 91.1% for solitary urolithiasis. The mean number of sessions required for success was found to increase according to increase in size of the stones whereas it was almost similar for various locations. Complications were encountered in 25% of cases. Conclusion: Stone size was found to be the most important predictor in successful outcome of ESWL and the procedure is quite favorable for stones less than 20 mm. Keywords: ESWL; renal stones; ureteric stones DOI: http://dx.doi.org/10.3126/njms.v1i1.5787 ? Nepal Journal of Medical Sciences. 2012; 1(1): 3-6
O Banquete Celta na literatura irlandesa antiga
Celia Ruiz Fuente
Brathair , 2010,
Abstract: Feasts and banquets as described in the Old Irish Literature from the Fenian and Ulster Cycles are a valuable source of information as to traditions and values of pre-Roman tribes. This article reviews this tematic with the aim of gaining an insight of the culture and character of the Celtic World through those celebrations whose descriptions are found in the old manuscripts, such as Leabhar na hUidre (The Book of the Dun Cow, c. XI) or Leabhar Laighneach (Book of Lecam, XII).
Pathophysiology of nephrolithiasis
Christos Paliouras,Eirini Tsampikaki,Polichronis Alivanis,Georgios Aperis
Nephrology Reviews , 2012, DOI: 10.4081/nr.2012.e14
Abstract: The incidence of nephrolithiasis has risen over the last twenty years and continues to rise. Although it is often referred to as a disease, recent advances in the understanding of the pathophysiology suggest that it is a systemic disorder. We conducted a PubMed based literature review on the recent advances in the pathophysiology of kidney stone formation. There is a link between diabetes, metabolic syndrome, obesity, insulin resistance and nephrolithiasis. Along with the aging population and a Western diet, these are the main reasons for the rising incidence and prevalence of nephrolithiasis. Different theories as to the pathophysiological mechanisms of lithogenesis have been proposed, including the free and fixed particle theories, and Randal’s plaque hypothesis. Among the different types of kidney stones, those containing calcium are the most common, followed by those containing uric acid, struvite and cystine. Supersaturated urine, acidic urine pH and reductions in kidney stone inhibitors in the urine are the main recognized causes that contribute to the formation of all these stonetypes. Nephrolithiasis is considered a systemic pathology that may lead to end-stage renal disease. Although much progress has been made, the underlying pathophysiological mechanisms of kidney stone formation are still not fully understood.
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