Multiband and Broadband impedance matching network

This thesis proposes parasitic aware design techniques for concurrent Multi-Band impedance matching networks. Different concurrent L-matching networks are analyzed and the substantial impact of component non-idealities on matching performance is addressed. To counter these impacts, the design methodology is modified and the improvement is verified for different concurrent dual-band networks. The same techniques are extended for quad band concurrent L-matching networks. The proposed parasitic aware methods are validated through practical components from Coilcraft and Murata libraries (offchip) and UMC 0.18_um RFCMOS technology (on-chip). The results show considerable improvement in both off-chip and onchip scenarios. Hence, the proposed method is much useful in low power concurrent multi band RF circuit design. The new methodology for broadband impedance matching has been discussed. In this the cascaded Highpass and Lowpass LC sections are designed at lower cutoff and Higher cutoff frequencies respectively. Bandwidth can be changed for given reflection coefficient. From this methodology a flat band is obtained. In this document ,the parasitic impact on broadband impedance matching network is analyzed. In narrow band impedance matching the component parasitic degrades the matching performance. The impact of parasitic are significant hence parasitic aware techniques are introduced to improve the performance in real environment. In broadband impedance matching , the impact of parasitics are analyzed for different topologies using real and imaginary impedance equations. The observation made from this analysis is that, the impact of parasitic on broadband impedance matching is not significant

Successful closure of the root apex in non-vital permanent incisors with wide open apices using single calcium hydroxide (caoh) dressing: report of 2 cases

Endodontic management of immature non vital permanent teeth in young pediatric patients is a great challenge to dentists. The walls of the root canals are frequently divergent and open apexes make debridement and obturation difficult. Thus closure of root apex is very essential for success of the endodontic treatment. Although different materials are used for the apexification procedure, calcium hydroxide is the material of choice for apical barrier formation and healing. There are different opinions regarding frequency of CaOH dressing change to induce complete closure of the apex. Literature suggests that dressing should be changed frequently. Therefore the aim of the present article is to report the successful closure of root apex in pulpless permanent incisors with wide open apices in two pediatric patients using single CaOH dressing

Maternal and fetal outcome of febrile morbidity in pregnancy at tertiary care level

Background: Fever in pregnancy is a common clinical problem worldwide. Effects of hyperthermia depends on the extent and duration of temperature elevation, timing of exposure in pregnancy and possibly on maternal nutritional status, comorbidities, medications, socio-economic background and several other factors. The exposure of maternal temperature has been reported to lead to cell disruptions, vascular disturbance and placental infarction which can lead to the risk of structural and functional defects in progeny. The underlying maternal cytokine polymorphism is strongly associated with both intrapartum fever and neonatal outcome. Hence there is a need to detect the various life-threatening medical complications of febrile morbidity leading to severe maternal morbidity and its impact on fetal outcome. Aim of study were to study the etiology of fever in pregnancy during the study period and to know the effect of fever on both the mother and the fetus. Methods: A prospective observational study. Results: Out of the 60 cases of fever in pregnancy, most common cause of fever was urinary tract infection (30%), followed by dengue fever (25%) and upper respiratory tract infection (23.3%). Fever was associated with complications as such PROM, PPROM, preterm labour, PPH, thrombocytopenia, anemia and abortions. Fetal outcome were preterm birth (25%), low birth weight (36%), neonatal sepsis (20%) and perinatal death (13.8%). Conclusions: Febrile morbidity in pregnancy leads to numerous maternal and fetal complications can occur due to fever in pregnancy from various causes. The most common cause of fever was UTI followed by dengue fever. The maternal and fetal complications can be avoidable if the cause for the fever is diagnosed and treated early

A Package Aware QLMVF Receiver Front End

This brief presents a 2.4 GHz receiver front end in the form of architecture of quadrature LNA-Mixer-VCO-filter (QLMVF) cell in 180 nm CMOS with split-transconductance amplifiers (TCAs). Instead of a single stack-current-reusing QLMV scheme, the proposed design employs two separate current reuse stages with a passive mixer to provide better flicker noise and linearity performance. A shunt-inductive input-match single-ended low noise amplifier (LNA) proposed with an improved package parasitic compensation through a simple varactor tuning. The quad-flat-no-leads (QFN) packaged receiver provides a measured maximum conversion gain of 40 dB, a noise figure (NF) of 10 dB, and a third-order input intercept point (IIP3) of -5 dBm with a spurious-free dynamic range (SFDR) of 60 dB. The front end consuming 2.7 mW of power from a 1.8 V supply and occupies an area of 1.5 mm2

Non-invasion sensing of glucose levels in human blood plasma by ultrasonic measurements

Abstract: This paper intends to integrate the current information about that data on Acoustic and Elastic parameters of Plasma of Normal Human blood. The parameters such as the ultrasonic velocity, Absorption coefficient, Modulus of elasticity and Loss modulus were calculated and tabulated for normal and diabetic mellitus of plasma its constituents at different frequency ranges. This paper reveals that tabulated data on specific gravity of plasma, water, erythrocytes of human blood. In the present investigation generally maximum velocity of blood is meant by velocity of blood is streaming in the capillary tube having infinite length is sustained from the graph. The capillary viscometry is the most prescribed method for evaluating the viscosity in liquids .In Human Physiology we are fascinated with specific characteristics and distinctive mechanisms of human body that make it a living being. So human being is actually automation and it is a part of automatic sequence of life, these special attributes allow us. In diabetic mellitus there is sufficient evidence that the elevated blood viscosity is a pathaogenetic factor of diabetic microangiopathy, altering microcirculation and leading to insufficient tissue nutrition. This paper mainly keen observation of that tabulated the data on ultrasonic velocity in different constituents of noramal and diseased blood. Generally blood sample is centrifuged and separated the plasma in this specific gravity was found for the five samples and it furnishes very good agreement with the standard values. This study is essential and developed in Biological and pathological division

Save cells before tooth replantation: A review

Avulsion is one of the most complex traumatic injury affecting both teeth and children. Avulsed teeth can be replanted. Treatment for avulsed teeth should include, pulp and periodontal ligament (PDL) cell management to increase the survival rate of these teeth. If immediate replantation is not possible, the clonicity and progenicity of the viable PDL cells can be maintained with the aid of suitable storage medium at the place of trauma. The incorrect use of a storage medium leads to PDL cell necrosis eventually resulting in ankylosis and replacement resorption of the tooth root. Due to the importance of the storage media in long-term prognosis of the avulsed teeth, an informed choice of a media is essential for a favorable outcome. This review discusses available storage media and their unique features along with pros and cons of each medium

A Comparative Rugoscopic Study of the Dentate and Edentulous Individuals in the South Indian Population

This study analyzes the rugae pattern in dentulous and edentulous patients and also evaluates the association of rugae pattern between males and females. Aims and Objectives. This study aims to investigate rugae patterns in dentulous and edentulous patients of both sexes in South Indian population and to find whether palatoscopy is a useful tool in human identification. Materials and Methods. Four hundred outpatients from Sree Balaji Dental College and Hospital, Chennai, were included in the study. The study group was equally divided between the sexes, which was further categorized into 100 dentulous and edentulous patients, respectively. Results. The edentulous male showed the highest mean of wavy pattern and total absence of circular pattern while the edentulous female group showed the highest mean of curved pattern and total absence of nonspecific pattern, while dentate population showed similar value as that of the overall population such as straight, wavy, and curved patterns. Conclusion. The present study concludes that there is similar rugae pattern of distribution between male and female dentate population while there is varied pattern between the sexes of edentulous population. However, the most predominant patterns were straight, wavy, and circular patterns