There is, I think, something ethereal about i —the square root of minus one. I remember first hearing about it at school. It seemed an odd beast at that time—an intruder hovering on the edge of reality.

Usually familiarity dulls this sense of the bizarre, but in the case of i it was the reverse: over the years the sense of its surreal nature intensified. It seemed that it was impossible to write mathematics that described the real world in …

I and i

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Electronic Transport In Mesoscopic Systems

Time-Frequency Analysis.

Antenna Theory And Design

The nephrotic syndrome

Abstract Background Thymus, bursa of Fabricius and spleen are the major lymphoid organs of avian species that plays a crucial role in their immunity. Though glucocorticoids are reportedly used as growth promoters, they also suppress the immune system. Objectives The objective of this study was to investigate the morphologic and morphometric adaptations in the lymphoid organs as well as the mortality rate in broilers in response to long‐term treatment with dexamethasone (DEX). Methods A total of 80 one‐day‐old broiler chicks (Cobb 500) were randomly divided into four homogenous groups (control – C and treatment groups – T1, T2, and T3). The treatment groups received DEX at the rate of 3, 5, and 7 mg/kg commercial feed. Samples, i.e. thymus, bursa of Fabricius, and spleen, were collected on 7, 14, 21, and 28 days of the experiment. Relative weight of the organs was calculated on each sampling day. The tissues were then processed and stained with haematoxylin and eosin stain for morphological and morphometric study. Results The relative weight of lymphoid organs was found substantially (p < 0.05) less in the DEX‐treated groups. Significant (p < 0.05) reduction in lobular size and the cortical‐medullary ratio was observed in the thymus of the DEX‐treated broilers. Follicular atrophy and massive depletion of lymphocytes were evident in the bursa of Fabricius. The mortality rate was also increased which was largely dependent on the dose and duration of DEX treatment. Conclusions The study results indicate that DEX treatment can alter the morphology and morphometry of lymphoid organs which might result in severe immunosuppression and increased mortality rate in broilers.

https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/vms3.1139

Effect of dietary dexamethasone on the morphologic and morphometric adaptations in the lymphoid organs and mortality rate in broilers

Theoretical analysis and calculation of polarization, piezoelectric field and sheet charge density of InN-based heterostructures have been studied as a function of lattice mismatch induced strain Theoretical investigation shows that polarity of the grown structure plays substantial influence on charge density and electron confinement A high sheet charge density and strong electron confinement at specific interfaces of the InN-based heterostructures are observed as a consequence of piezoelectric polarization and spontaneous polarization effects

Piezoelectrically Induced Polarization and Charge in InN-Based Heterostructures

The COVID-19 pandemic has inundated the capacity of hospitals across the globe, exhausting resources, and placing extreme burden on health care workers (HCWs). Hospital preparedness during infectious disease outbreak involves development and implementation of appropriate strategies, procedures, and adequate training for HCWs. Reliable and valid tools to evaluate the perception of HCWs on the effectiveness of hospital preparedness strategies are imperative and literature is yet to fill that gap.Items for 'The Staff Questionnaire for Infectious Disease Outbreak Readiness and Preparedness (SQIDORP)' were selected from literature that addressed hospital preparedness during novel pandemic outbreaks. The SQIDORP was distributed within a regional hospital in Victoria, Australia. Psychometric evaluation included estimates of reliability and factor analysis while factors associated with the questionnaire were explored using regression analysis.Omega coefficient of 0.89, Cronbach's alpha coefficient of 0.88 and item-total correlations (> 0.3) indicated adequate reliability of the SQIDORP. Factor Analysis yielded three meaningful latent factors that are effectiveness of training (Factor 1), self-confidence (Factor 2) and risk to self and stress (Factor 3). Demographic factors did not influence the correlation with SQIDORP. However, rating 'the current plan for management of COVID-19 in your ward' and 'personal knowledge/skills in caring for patients with COVID-19' had significant positive correlation and accounted for 33% of the variance in readiness and preparedness using SQIDORP (R2 = 0.33, F = 10.227, P < 0.001).Most of the items of SQIDORP questionnaire achieved adequate internal consistence reliability. This is a valuable tool that can be utilized by hospitals to explore aspects of preparedness and give insights to the knowledge, skills, and mental health of HCWs, as perceived by the HCW themselves. 

/pdf/the-development-and-psychometric-evaluation-of-covid-19-it26d26b.pdf

The development and psychometric evaluation of COVID-19 staff questionnaire for infectious disease outbreak readiness and preparedness (SQIDORP)

The threshold voltage model of ultra thin body (UTB) XOI FET is studied here. 2-D Poisson equation is solved to calculate the threshold voltage. To incorporate the short channel effects, quantum mechanical correction factors are introduced in the model. Then, the effect of different device parameters on the threshold voltage is investigated.

Threshold voltage of UTB XOI FET

Rates of caesarean section (CS) delivery are increasing worldwide. CS delivery is often complicated by post-surgical infection, estimated to have ten times higher risk of infections than that of vaginal delivery. While widespread use of prophylactic antibiotics with CS has reduced post-CS infection, incidence may be reduced further by cleansing the vagina with betadine antiseptic wash prior to CS. However, reports are not consistent, and different antiseptics have been practised variably. Therefore, in order to ensure that the risks to the mother are as minimal as possible, it is important to determine whether vaginal irrigation with antiseptic wash reduces post-CS infection rate, and if so, which antiseptic is paramount.Women giving birth by elective or emergency CS will be assigned into either the intervention (1% povidone iodine (n = 125) or chlorhexidine (n = 125)) or the control (no-irrigation (n = 125)) group by using a block randomisation technique. Participants will receive vaginal cleansing with an intervention or no vaginal cleansing prior to CS. Follow-up will occur at day 14 and day 28 post-CS. A predeveloped questionnaire will be completed with patients' socio-demographic characteristics and required clinical and pregnancy-related information. All the fever, infection and readmission-related information will be completed from either the patient's or their record or at follow-up visits. Occurrence of post-CS infection, as measured by primary and secondary outcomes, will be compared between the groups.The results of this study may provide important data to define the future uniform use of vaginal antiseptic wash immediately prior to CS and to determine the best antiseptic wash details in reducing post-operative infections or complications.Australian New Zealand Clinical Trials Registry (ANZCTR) ACTRN12620000971932p . Registered on 28 September 2020. 

/pdf/effect-of-vaginal-antiseptic-prior-to-caesarean-section-on-2v81l6hr.pdf

Md. Rafiqul Islam

Papers

Effect of dietary dexamethasone on the morphologic and morphometric adaptations in the lymphoid organs and mortality rate in broilers

Piezoelectrically Induced Polarization and Charge in InN-Based Heterostructures

The development and psychometric evaluation of COVID-19 staff questionnaire for infectious disease outbreak readiness and preparedness (SQIDORP)

Threshold voltage of UTB XOI FET

Effect of vaginal antiseptic prior to caesarean section on the rate of post-caesarean complications: a blinded randomised controlled trial