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In this investigation the problem of study is the impacts of viscous dissipation, thermal radiation on the MHD heat transfer flow of Casson fluid across a moving wedge with convective boundary condition in the existence of and internal heat generation/absorption. The governing equations are changed to some coupled differential equations which are not nonlinear with aid of similarity variable. The numerical calculations of the equations are elucidated by the MATLAB package solver bvp5c. The changes of the pertinent constraints on the momentum and temperature have been discussed through graphs and numerical values of skin friction and heat transfer factor are listed in the tabular pattern. The velocity increases and the temperature decreases as λ > 1 increases in the instance λ, also temperature increases with an increase of Radiation parameter.

In this investigation the steady of laminar magnetohydrodynamic(MHD) heat and mass transfer two dimensional boundary layer nanofluid flow past a wedge embedded in a porous media in the availability of the viscous dissipation, thermophoresis and Brownian motion effects are taken into account. With the assistance of the similarity transformation, the governing partial differential equations (PDE) are transformed into nonlinear ordinary differential equations (ODE). The solution of the problem is solved numerically by using the MATLAB in built package solver bvp4c. The method's accuracy is examined against recently discussed results and outstanding agreement was reached. The impacts of the pertinent flow parameters are examined through graphs and tabular form.

A high order multiple input multiple output (MIMO) antenna assembly is designed for Ultra-Wideband (UWB) applications. The antenna configuration is based on a peculiar arrangement of the radiating elements. A defected microstrip structure is also introduced on the feedlines. The use of a novel technique, the so-called ports-shift, is here discussed. In the proposed antenna, a protruded ground branch structure is employed in combination of three parasitic stubs so as to enhance isolation and impedance matching over the UWB frequency band. The results show that the presented antenna exhibits a good impedance matching which is about -10 dB with a high mutual coupling 15 dB, and envelope correlation coefficients (ECC) smaller than 0.15. The antenna also exhibits good diversity gain of about 9.5, and a good efficiency that varied between 56% and 91% and total active reflection coefficient of less than -20 dB. Which makes it a good candidate for UWB applications.

This work presents a circular planar antenna with reconfigurable radiation pattern using parasitic patches. The radiation pattern of the proposed antenna may take different radiation modes. The mode change is made using the PIN diodes connected in the gap between the central circular patch and the parasitic patches. A short circuit or an open circuit can be provided by this gap. The proposed antenna works at 5 GHz, such as 802.11a/d/n applications. The goal is to provide wider coverage by redirecting the main lobe and controlling the main beam directions to avoid interference with surrounding signals.

This study takes into account the viscous dissipation of the laminar viscosity and radiation influence of the MHD heat and mass transfer nanofluid flow across two dimensional boundary layers in the porous medium in the existence of heat, thermophoresis and Brownian motion influence. The governing equations are transformed into nonlinear ordinary differential equations by the aid of the similarity transformation. The solution is numerically solved with the MATLAB in the built-in bvp4c solver. The influences of the appropriate flow parameters are analysed in graphs and in tabular form.

In this paper, we apply a several wavelets basis functions to the method of moments to modeling the parallel-coupled microstrip lines. The first set of equations is for the shielded microstrip line solved with moment’s method and wavelets. The Green’s function is obtained from the theory of images. The second set are for the parallel-coupled microstrip lines operating in the TEM mode or when the analysis can be based on quasi-static approximation, the properties of coupled lines can be determined from the self- and mutual inductances and capacitances for the lines. To demonstrate the effectiveness and accuracy of the proposed technique, numerical results of even- and odd-mode characteristic impedances, coupling coefficient, percentage sparsity achieved in the impedance matrix, the CPU Time to reverse impedance matrix, and error relative for Daubechies, Coiflets, Biorthogonal and Symlets wavelets are presented. Numerical results are in good agreement with those in previous publications.

This work presents a reconfigurable radiation pattern antenna for WLAN wireless system. The reconfigurable antenna is fed by a coaxial cable, and consists of a star patch, eight hexagon-shaped radiation cells and a circular planar ground. The pattern-reconfigurable antenna proposed achieves eight reconfigurable states by controlling the ON and OFF of eight PIN diodes to change the direction. The state change is performed by PIN diodes connected in the gap between the central star patch and the radiation cells. The antenna has a bandwidth of 360 MHz and can steer the beam in the direction 20°, 340° in azimuth plane. The antenna main beam can be switched to eight directions in elevation plane. The simulated results are also presented and investigated.

A compact ultra-wideband (UWB) multiple input-multiple output (MIMO) antenna with high isolation is designed for UWB applications. The proposed MIMO antenna consists of two identical monopole antenna elements. To enhance the impedance matching, three slots are formed on the ground plane. The arc structure as well as the semicircle with an open-end slot is employed on the radiating elements the fact which helps to extend the impedance bandwidth of the monopole antenna from 3.1 up to 10.6 GHz, which corresponds to the UWB band. A ground branch decoupling structure is introduced between the two elements to reduce the mutual coupling. Simulation and measurement results show a bandwidth range from 3.1 to 11.12 GHz with |S11_|S21_

This This paper presents a low noise amplifier (LNA) for WLAN applications. The target frequency band 802.11b/g@ 2.4GHz. The amplifier is characterized by input and output reflection coefficients less than −15dB, a forward gain (S21) of 15.112dB, a noise figure of 0.37dB and the third input intercept point of 14.8dB.

This paper presents the analysis of RF-DC conversion circuit topologies designed for wireless energy harvesting at 2.45 Ghz. two rectifications circuits are studied, designed and compared at the conversion power level. The power efficiency of the series and shunt topology are 70% and 74% respectively at the 2.45Ghz frequency. these topologies have been studies and their performances have been evaluated. The simulation results of rectifier circuit are obtained using Advanced Design System-ADS Software.

Adnexal tumors like giant solitary trichoepitheliomas are uncommon to most of us to permit a ready familiarity with them. Information regarding the genesis, clinical profile, behavior, and management options for this tumor is limited. There are 18 cases reported in the world literature till date. This review attempts to provide insight to this rare tumor. Our search included indexed literature from Pubmed, Directory of Open Access Journals, Health Inter Network Access to Research Initiative and Google databases in addition to standard dermatology texts. Giant solitary trichoepithelioma is a rare trichogenic tumor with potential for local recurrence. It has predilection for the older age, but may present at any age including at birth. It has close resemblance to basal cell carcinoma and other skin adnexal tumors - clinically, cytologically, and histologically. CD10, CD 34, PHLDA1 but not p75NTR are useful adjunct markers. Surgical excision is the standard treatment. Recurrence and possible transformation into BCC cautions follow up at regular intervals.

Resume Introduction La neoplasie malpighienne de la surface oculaire est la cause la plus frequente des tumeurs conjonctivo-limbiques malignes. Son aspect clinique precoce peut parfois etre atypique, et confondu avec celui d’un pterygion. Observation Nous rapportons l’observation d’une femme ayant presente une volumineuse tumeur conjonctivo-limbique initialement etiquetee pterygion pour laquelle un examen en microscopie confocale in vivo a ete realise. Cet examen a permis de mettre en evidence des elements en faveur d’une neoplasie malpighienne de la surface oculaire de type invasive ou carcinome epidermoide, diagnostic fortement suspecte par l’examen clinique et confirme ensuite par l’examen anatomopathologique de la piece d’exerese chirurgicale. Conclusion Cette observation souligne l’interet de la microscopie confocale in vivo pour le diagnostic des tumeurs conjonctivo-limbiques malignes, examen qui peut etre une aide au diagnostic differentiel entre tumeurs malignes debutantes et pterygion.

Objectif : Etude pilote exploratrice a usage compassionnel, non controlee, visant a evaluer la tolerance et l'efficacite d'une nouvelle solution ophtalmique a base d'agents de regeneration, analogues des heparanes sulfates (RGTAs) dans les ulceres de cornee et les dystrophies corneennes chroniques severes resistantes aux traitements usuels. Rationnel : Les RGTAs sont des biopolymeres de grande taille concus pour remplacer les heparanes sulfates lies specifiquement aux proteines de la matrice et aux facteurs de croissance mais detruits lors de lesions tissulaires. Les proteines fixees sur le RGTA sont alors protegees contre une proteolyse, ce qui permet de restaurer le microenvironnement de la matrice extracellulaire. Les signaux endogenes necessaires au renouvellement cellulaire qui assurent localement l'homeostasie tissulaire sont a nouveau en place sur la matrice restauree pour declencher la bonne sequence spatio-temporelle de migration et de multiplication cellulaire. La therapie matricielle par le RGTA represente une alternative aux therapies geniques ou cellulaires proposees en medecine regenerative. Dans un modele pre-clinique d'ulceration severe de cornee induite par base chez le lapin, une seule instillation avait ete suffisante pour augmenter fortement la vitesse et la qualite de la cicatrisation et permettre apres seulement une semaine une restauration de la cornee d'une qualite histologique presque normale. Ce sont ces resultats qui nous ont pousses a entreprendre cette premiere etude clinique dont le but principal etait d'evaluer la tolerance locale de cette preparation. Patients et methodes : Onze yeux de dix patients ont ete inclus dans l'etude. Tous les patients avaient des dystrophies corneennes severes ou des ulceres corneens douloureux, avec des douleurs cotees au moins 50 sur une echelle visuelle analogique (EVA) notee de 0 a 100, et en echec de traitement. La solution oculaire a base de RGTA a ete instillee par l'investigateur en consultation a raison d'une goutte hebdomadaire pendant un mois. La tolerance et l'efficacite ont ete jugees sur des criteres subjectifs bases essentiellement sur l'appreciation de la douleur et de la gene fonctionnelle et sur des criteres objectifs cliniques lors d'un examen ophtalmologique complet a J3, J7, J14, J21, J28 puis a 2 mois et 3 mois du debut du traitement. Resultats : L'etude a pu etre menee a terme chez tous les patients inclus au depart. La tolerance etait excellente sur le plan local et general: pas de gene a l'instillation, pas d'aggravation de la pathologie initiale, d'apparition d'inflammation oculaire ou d'augmentation de la tension oculaire, et pas d'effets adverses generaux. Par ailleurs, on a observe un effet antalgique notable rapide augmentant au fil des instillations avec un retour des douleurs dans la majorite des cas apres arret du traitement. Le score d'EVA a l'inclusion etait de 72,73 ± 7,86, il a baisse de facon significative des la premiere administration du traitement. A un mois, le score d'EVA moyen etait de 32 ± 15,49 puis il est remonte a l'arret du traitement renforcant ainsi l'hypothese d'un lien entre les effets observes et l'application du produit. L'efficacite sur la keratite a ete moderee mais avec une tendance generale vers l'amelioration apres l'instillation de la solution ophtalmique. Le score d'Oxford decrivant l'intensite de la keratite ponctuee superficielle etait de 3,37 ± 1,06 a l'inclusion. Apres un mois il etait de 1,57 ± 0,97, il a donc baisse de facon significative au cours du traitement. Sur les cinq cas inclus d'ulceres de cornee, quatre ont cicatrise au cours du protocole. Deux ont recidive des l'arret du traitement, deux ont cicatrise sans recidive au dernier controle. Le dernier cas etait caracterise par une insuffisance limbique et aucune amelioration n'a ete notee. Il est important de rappeler ici que ces ulceres etaient resistants a toutes les therapeutiques usuelles. Conclusion: Cette nouvelle solution ophtalmique a base de RGTA utilisee dans les dystrophies corneennes chroniques et les ulceres de cornee rebelles est tres bien toleree sur le plan local et general. Elle diminue les douleurs de facon significative et favoriserait la cicatrisation corneenne dans certains cas. Toutefois l'instillation hebdomadaire d'une goutte peut sembler insuffisante et ces premiers resultats prometteurs meritent d'etre etayes par des etudes plus larges, controlees et des posologies mieux adaptees.

But Decrire la structure et l’aspect tissulaire in vivo du pterygion a l’aide d’un microscope confocal de nouvelle generation (Heidelberg Retina Tomograph II Rostock Cornea Module) et montrer les elements caracteristiques des pterygions actifs. Patients et methode Nous avons analyse au biomicroscope et au microscope confocal 20 pterygions de 15 patients. Aucun de ces patients n’avait ete opere de pterygion. Resultats La microscopie confocale a permis de realiser in vivo des coupes optiques de haute resolution. Nous avons pu identifier l’epithelium conjonctival recouvrant le pterygion avec son bourrelet peripherique, le stroma pterygial avec sa vascularisation, les ilots et la zone progressive de Fuchs, et les cellules dendritiques qui etaient d’autant plus nombreuses que le pterygion etait actif. Discussion L’analyse de la structure et de l’histologie du pterygion a ete l’objet de nombreuses publications. La microscopie confocale en mode HRT-II permet une nouvelle approche in vivo de cette pathologie et permet en particulier d’evaluer avec precision son caractere evolutif.

Sedation and analgesia are frequently administered to paediatric patients for procedures done outside the operating room. Both diagnostic and therapeutic procedures are now being increasingly done outside the oper-ating room partly due to time constraints, partly in an effort to decrease cost and partly due to fear of compli-cations of sedation. So children are often subjected to sedation by unskilled personnel with little or no training in resuscitation. In other cases children who would have benefited by sedation are being denied sedation and/ or left with long term psychological scars. The fear of undergoing a painful procedure or a procedure in unfamiliar surroundings remains considerably high. This is especially true in young children and mentally handicapped children. The whole issue is compounded by parental anxiety, separation from parents and pain or anticipation of pain during the procedure. It is poorly understood that procedures done outside the operat-ing room require the same attention to anxiolysis, analgesia, sedation and safety guidelines as procedures performed in the operating room. To this end we require appropriate definitions, goals, guidelines, monitoring and adequately trained personnel. In this review and update we have examined the international guidelines, looked at the drugs which may be used, and safety constraints. We also have enunciated guidelines for proce-dural sedation in children which may be adapted to the Indian scenario.

In this paper, a design and analysis of compact coplanar waveguide-fed ultra wideband antenna is presented. The antenna design exhibits a very wide operating bandwidth of 14.3GHz with a return loss better than 10dB in the frequency range from 3.7GHz to 18GHz. The gain of the proposed antenna is around 4.8dBi. This antenna configuration would be useful for UWB indoor application as it is easy to fabricate and integrate with RF circuitry. All simulations in this work were carried out by using the electromagnetic software.

Objectifs Etudier la precision anatomo-clinique des atteintes epitheliales corneo-conjonctivales au cours de diverses pathologies de la surface oculaire analysees in vivo a l’aided’un microscope confocal de nouvelle generation (Heidelberg Retina Tomograph II [HRT] Rostock Cornea Module), et comparer ces resultats avec ceux obtenus en immunocytochimie sur empreinte corneenne ou conjonctivale. Patients et methodes Trente-six yeux de 18 patients, presentant des pathologies de la surface oculaire diagnostiquees cliniquement, ont ete examines : epitheliopathie corneenne secondaire a une rosacee oculaire (5 patients) ; syndromes secs par deficit lacrymal dans le cadre d’un syndrome de Gougerot-Sjogren (5 patients), ou par hyperevaporation secondaire a un dysfonctionnement meibomien (8 patients). Les 18 patients ont beneficie d’une etude au biomicroscope, au microscope confocal puis d’une empreinte corneenne et/ou conjonctivale realisee sur le meme site d’examen. Les parametres au cours de cette etude ont inclus au niveau corneen et conjonctival : la morphologie epitheliale a l’echelle cellulaire ; la densite en cellules a mucus et leur eventuelle presence dans l’epithelium corneen ou au limbe ; la presence et la densite de cellules inflammatoires. Resultats Le microscope confocal a permis de realiser in vivo des coupes optiques de haute resolution de toute la surface oculaire. Cet examen a objective, a une echelle cellulaire, les modifications importantes de la surface oculaire lors des keratoconjonctivites seches, confirmant la perte en cellules a mucus, la metaplasie squameuse epitheliale, les infiltrations de cellules inflammatoires et, meme dans certains cas, l’aspect de « snake-like chromatin » decrit jusqu’alors uniquement en histologie. Au cours des epitheliopathies corneennes secondaires a une rosacee oculaire, la conjonctivalisation de la couche corneenne epitheliale pouvait etre bien identifiee avec la presence de cellules a mucus et de cellules morphologiquement proches de l’epithelium conjonctival envahissant un epithelium corneen metaplasique. L’analyse comparative entre les images obtenues in vivo avec cet appareil et in vitro par immunocytochimie sur empreinte corneo-conjonctivale a mis en evidence une excellente correlation anatomo-clinique dans chaque cas. Conclusion La microscopie confocale HRT II in vivo permet l’etude precise de la cornee centrale, du limbe et de la conjonctive, contrairement aux premieres generations d’appareils. Les images realisees avec cet examen dans le cadre des pathologies de la surface oculaire presentent une excellente correlation anatomo-clinique. Ce strict reflet de l’architecture cellulaire, demontre in vitro sur empreintes corneo-conjonctivales, valide la qualite de resolution du microscope confocal et confirme le potentiel extremement prometteur de cette nouvelle technique d’exploration.

The competition between fusion-fission and quasi-fission in the reactions 48 Ca+ 208 Pb and 48 Ca+ 244 Pu(E * = 40MeV) is investigated using the pre-scission neutron multiciplicity distributions ( PSNMD ) obtained with a new analysis protocol.

In this article, a new low-cost active antenna for WLAN sensor applications is presented. The proposed system operates as a transceiver whereby the received coded data signal from the broadside direction is retransmitted over a wide area in other directions. This is performed so that a null response at the main pointing angle is maintained. It is formed by a three elements series array connected to high- performance FET-based down- and up-converters. The performance of the proposed architecture is verified using experimental results. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2882–2884, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24788

Nonsteroidal anti-inflammatory drug-induced colonic strictures are uncommon and usually occur in the proximal ascending colon. We describe the progressive findings of nonsteroidal anti-inflammatory drug-induced strictures in the ascending colon and at the ileocecal valve with subsequent bowel obstruction secondary to intussusception.

Ocular surface squamous neoplasia (OSSN) is the most common conjunctival and limbic malignant tumor that could resemble a pterygium in the early phase of the disease.We report the case of a woman who presented with a limbic tumor of the left eye that was mistakenly diagnosed as a pterygium. An in vivo confocal microscopy examination using the HRTII Rostock Cornea Module and a surgical biopsy were performed. The in vivo confocal microscopy findings and the slit lamp examination showed characteristics that strongly supported the diagnosis of OSSN, and the histological examination of both biopsy and surgical exeresis (exenteration) confirmed the diagnosis of epidermoid carcinoma.This case report underlines the value of in vivo confocal microscopy in the diagnosis of OSSN, particularly epidermoid carcinoma. This device could be helpful for the early differential diagnosis with pterygium.

This study's objective was to evaluate the tolerance and safety of a new ophthalmic solution based on ReGeneraTing agent (RGTA) technology in a pilot noncontrolled exploration on compassion use for corneal ulcers and severe chronic dystrophies resistant to the usual treatments.RGTAs are large biopolymers engineered to replace heparan sulfates specifically bound to matrix proteins and growth factors destroyed after a lesion has occurred. The RGTA-bound proteins are protected from proteolysis and this allows the extracellular matrix microenvironment to restore its original proper organization. The initial endogenous signals needed for tissues to regenerate are back on the restored matrix. They are expected to trigger the natural onset of events, signaling cells to migrate and multiply with the cascades and equilibrium found in tissue homeostasis. RGTA-induced matrix therapy is a possible alternative to cell or gene therapy in regenerative medicine. In a rabbit preclinical model of alkali-induced severe corneal ulcers, a single instillation of RGTA ophthalmic solution was found sufficient to enhance speed and quality of healing, restoring an almost normal corneal histology after only 1 week. These data prompted us to initiate this study.Eleven eyes from ten patients were included in this study. All patients had severe dystrophic cornea or painful corneal ulcers rated over 50 on the VAS pain scale ranging from 0 to 100 and had undergone unsuccessful treatments. The RGTA ophthalmic solution was administered by the investigator during each weekly consultation as a single drop over 1 month. Tolerance and efficacy were judged on subjective criteria based on pain evaluation and functional inconvenience as well as on objective clinical criteria through a complete ophthalmic examination at days 3, 7, 14, 21, 28 and after 2 and 3 months from the beginning of the treatment.The study was conducted to completion for all patients included at the beginning. Tolerance was excellent both locally and generally: no uneasiness during instillation, no worsening of the initial pathology, no occurrence of ocular inflammation or increase in ocular pressure, and no general side effects were observed. In addition, we observed a noticeable analgesic effect, increasing with time and instillations, but pain reappeared in the majority of cases as treatment ended. The mean visual analog scale pain score was 72.73 +/- 7.86, it decreased significantly with the first drops of treatment. After 1 month, the mean visual analog scale pain score was 32+/-15.49, then it increased after the end of the treatment, confirming the link between the effects observed and the treatment. Efficacy on keratitis was moderate but with an overall tendency toward improvement. The initial Oxford Score was 3.37 +/- 1.06. After 1 month, it decreased significantly to 1.57 +/- 0.97 and then it rose again after the end of the treatment. As for corneal ulcers, of the five cases included, four healed during the protocol. Two reversed when the treatment stopped, two healed without reversion at the last follow-up visit. The last case was characterized by stem cell deficiency and no improvement was noted. It is important to keep in mind that these ulcers were all resistant to usual therapies.This RGTA ophthalmic solution is the first matrix therapy product in ophthalmology. The RGTA OTR4120 was used in treating chronic and severe corneal dystrophies as well as corneal ulcers resistant to usual treatments. It was very well tolerated with no side effects. It significantly reduced pain and favored corneal healing in almost all corneal ulcers. Weekly instillation of a single drop seems insufficient and these very promising data need to be confirmed on a larger population in a controlled trial with more adapted dosages. Based on these preliminary data, a RGTA-based matrix therapy product may be a very innovative solution to unresolved pain and corneal surface healing problems.