High energy kink in the dispersion of a hole in an antiferromagnet -- double-occupancy effects on electronic excitations

Evolution of the hole spectral function along the Gamma-(pi,pi) cut is studied in the antiferromagnetic state of the Hubbard model. The kink in the calculated hole dispersion, the sharp spectral-weight transfer between the branches, and the drastically suppressed coherent spectral weight near k=(0,0), as observed recently in the high-resolution ARPES studies of cuprate antiferromagnets, are shown to be strongly enhanced by finite-U double-occupancy effects. Together with the anomalous spin-wave dispersion observed earlier in high-resolution neutron-scattering studies, the present study provides further evidence of a unified description of magnetic and electronic excitations in cuprate antiferromagnets in terms of the Hubbard model.Comment: 5 pages, 7 figure

Hole and electron dynamics in the triangular-lattice antiferromagnet -- interplay of frustration and spin fluctuations

Single-particle dynamics in the 120$^{\circ}$ ordered antiferromagnetic state of the triangular-lattice Hubbard model is studied using a physically transparent fluctuation approach in terms of multiple magnon emission and absorption processes within the noncrossing approximation. Hole and electron spectral features are evaluated at intermediate $U$, and analyzed in terms of a competition between the frustration-induced direct hopping and the virtual hopping terms. Finite $U$-induced competing interactions and frustration effects contributing through the magnon dispersion are also discussed. Finite contribution to self-energy correction from long-wavelength (Goldstone) modes, together with the high density of electron scattering states in the narrow, sharp peak in the upper band, result in strong fermion-magnon scattering leading to pronounced incoherent behaviour in the electron dynamics. The fluctuation-induced first-order metal-insulator transition due to vanishing band gap is also discussed.Comment: 10 pages, 13 figure

A Qos Adaptive Routing Scheme (IGLAR) For Highly Dynamic Vehicular Networks with Support to Service and Priority

This paper proposes an improved geolocation based QoS aware routing algorithm (IGLAR), which focuses on identifying optimal paths for effective routing in highly dynamic mobile ad hoc network such as VANET based on vehicular traffic at cross roads over a static high way lane. The process of selection and utilizing the optimal QoS route gets updated on transmission. IGLAR works on route identification, route binding, update and deletion process based on the validation of adaptive QoS metrics, before the optimal route selection process between source and destination. This research work discusses on the survey and analysis the performance of GPSR [9], AODV [8], DYMO [12] and proposed scheme based on simulation test beds and scenario mapping using VanetMobiSim with NS-3 simulator. The proposed routing scheme IGLAR has been designed and implemented as per the DSRC specifications [13] and IEEE 802.11p MAC. Keywords: VANET, GPSR, AODV, DYMO, VanetMobisi

The Study to Analyze the Impact of Green Supply Chain Management in India

Green supply chain management can be explained as a supply chain management system which is beneficial for the environment and which consists of designing of products , selection of raw material,manufacturing steps and delivery and preparation of final product through a stable and sustainable process.Sustainibility is the major key to supply chain ,which starts with the understanding through all the phases of production upto final distribution. This paper majorly focuses on the importance and need of term green and concepts or activities which are related to greener activities in areas like manufacturing and remanufacturing of products having a green impact ,controlling of travel costs and waste products , reverse logistics etc. The purpose is to understand the impact and also to make people aware about the major difficulties, problems and also the advantages and profits which are a part of such a great green concept if it is successfully implemented or installed during the process of supply chain management in various organisations.Keywords : Production, customer , supply chain , green , sustainability , manufacturing , materials

Adverse events of albendazole due to mass drug administration

Background: Soil-transmitted helminths are mostly prevalent in developing countries due to poor sanitation and lack of adequate clean water. The present study examines adverse events (AEs) experienced following administration of albendazole to children (2-19 Years) at Uttarakhand on national de-worming day.Methods: Children were given single doses of albendazole on national de-worming day. Some of children experienced adverse events and were admitted in hospital of Govt Medical college Haldwani (Uttarakhand). Data were collected and analyzed.Results: Total twenty five children were admitted due to albendazole adverse events. Out of these 92% were female. Mean age of admitted children was 14.14 years with standard deviation 3.45. Mean onset of adverse events was 5.6 hours with standard deviation of 1.5 hours. All children were treated symptomatically and were discharged once they recovered. No fatality due to adverse events was observed. Average duration of stay in hospital was 3.4 days. Out of twenty five children 12% children reported four or more adverse events, 40% children reported three adverse events and 48% reported two adverse events. Out AEs, 33% AEs were mild, 19% AEs were moderate, 31% AEs were severe and 17% AEs were serious. Abdominal pain was reported by 76%, headache by 44%, loss of consciousness by 32%, vomiting by 28%, nausea by 16%, convulsions by 12%, rashes by 8%, fever by 8%, and breathlessness by 14% and vertigo by 4%.Conclusions: The adverse events were mild to serious but transient, but all of them recovered after hospitalization. Therefore, it is imperative that mass drug administration programmes put in place surveillance measures in order to ensure timely detection, management and reporting of potential life threatening AEs

Pattern of adverse drug reactions occurring at department of neurology of a tertiary care hospital in India

Background: The objective of the study was to study the pattern and trends of adverse effects of drugs used in department of neurology in a tertiary care hospital.Methods: A prospective, observational study was carried out for a duration of 12 months from November 2018 to October 2019 at Department of Neurology and Department of Pharmacology and Therapeutics, G.S.V.M. Medical College, Kanpur after getting an approval from institutional ethical committee. Data was collected by analyzing OPD prescription slip, treatment charts and investigation reports. All relevant information regarding adverse drug reactions (ADRs) were collected as per norms of Indian Pharmacopoeia commission (IPC).Results: During the study period, a total of 130 ADRs reported. Most of the ADRs were reported due to antiepileptic drugs followed by antiparkinsonian drugs. Dizziness was the most frequent ADR reported. Most of the ADRs were reported due to phenytoin. Other ADRs observed were drowsiness, nausea/vomiting, weakness, joint pain, dyskinesia.Conclusions: Most of the ADRs were due to anti-epileptic drugs. Most of the reactions were of mild severity

Effect of antenatal exercises on pulmonary functions and labour outcome in uncomplicated primigravida women: a randomized controlled study

Background: Physical fitness could influence pulmonary functions, labour and neonatal outcomes in pregnancy. The present study was undertaken to evaluate the effect of antenatal exercises on pulmonary functions and labour outcomes.Methods: Study included 122 uncomplicated primigravida in age group of 18-35 years at 24th - 28th week of gestation were randomly allocated into study and control groups. Antenatal exercises were performed by study group for a minimum of 3 days a week for 20 minute duration till their delivery. Pulmonary function tests (PFTs) were done for all subjects at 24th week of gestation and after 36th week of gestation.Results: A significant improvement in FEV1, FVC, FEF25-75%, MEF50%, MIF50% and MVV between 24 & 36 weeks was observed in the study group after exercises. In study group 85.24% patients had spontaneous onset of labour, 14.8% patients had induction of labour as compared to 75.4% and 24.6% respectively in control group, however statistically insignificant. In the study group 41.67% patients did not require augmentation compared to 22.95% in the control group. In study group 13.11% patients had meconium stained liquor which was significantly less in comparison to 41% patients in the control group. Mean duration of first, second and third stage of labour was shorter in study group than control group. In study group 96.72% had normal and none had instrumental vaginal delivery compared to 88.52% and 6.6% from control group respectively. Caesarean section rate was 3.3% in study group and 4.9% in control group. APGAR score was normal in all the neonates. Fetal weight gain, birth weight, birth length and head circumference was significantly higher and NICU stay was significantly lesser in study group compared to control group.Conclusions: Antenatal exercises lead to improvement of pulmonary functions and hence labour and neonatal outcomes