76 research outputs found
A prospect of moving towards free milk quota market in Ireland – will milk quota movement follow efficiency?
Get PDFQuota trade in Ireland is ‘ring fenced’ to milk processors where farmers are not allowed to trade milk quota outside their designated milk processor. This ensures milk production staying within a region but has implications for the efficiency of milk production. In this paper, we simulated a free milk quota market in Ireland and compared the results with a milk quota exchange which was ring fenced to determine if the quota move from an inefficient region to a more efficient region. The results show that quota indeed follow efficiency of production when there is restriction over trade area.Milk quota trade, Irish quota market, Farm level model, Agricultural and Food Policy,
Retrieval of embolized intracardiac peripherally inserted central catheter line: Novel percutaneous technique by utilizing a flexible biopsy forceps
No full textPeripheral catheter embolization to the heart is common but infrequently reported. In view of the hazardous complications of thrombosis, embolism, infection, arrhythmia and even death, percutaneous retrieval of such foreign bodies is usually attempted. Previously reported percutaneous technique of retrieval mainly involved the snaring technique. Herein, we report a novel nonsurgical retrieval technique for successful removal of a 46 cm long embolized intracardiac peripherally inserted central catheter by utilizing a flexible biopsy forceps. To the best of our knowledge, the use of flexible biopsy forceps for retrieval has hitherto been unreported and this case report therefore adds to the repertoire of percutaneous retrieval techniques for safe and easy removal of embolized catheters to the heart
Severe acute respiratory syndrome coronavirus 2 positivity in neonates born to coronavirus disease 2019-positive mothers: A retrospective data analysis
No full textNon-invasive estimation of pulmonary vascular resistance in patients of pulmonary hypertension in congenital heart disease with unobstructed pulmonary flow
No full textContext: Pulmonary vascular resistance (PVR) is a critical and essential parameter during the assessment and selection of modality of treatment in patients with congenital heart disease accompanied by pulmonary arterial hypertension.
Aim: The present study was planned to evaluate non-invasive echocardiographic parameters to assess pulmonary vascular resistance.
Settings and Design: This prospective observational study included 44 patients admitted in the cardiology and pediatric cardiology ward of our institution for diagnostic or pre-operative catheter based evaluation of pulmonary arterial pressure and PVR.
Materials and Methods: Detailed echocardiographic evaluation was carried out including tricuspid regurgitation velocity (TRV) and velocity time integral of the right-ventricular outflow tract (VTI RVOT ). These parameters were correlated with catheter-based measurements of PVR.
Results: The TRV/VTI RVOT ratio correlated well with PVR measured at catheterization (PVRcath) (r = 0.896, 95% confidence interval [CI] 0.816 to 0.9423, P < 0.001). Using the Bland-Altman analysis, PVR measurements derived from Doppler data showed satisfactory limits of agreement with catheterization estimated PVR. For a PVR of 6 Wood units (WU), a TRV/VTI RVOT value of 0.14 provided a sensitivity of 96.67% and a specificity of 92.86% (area under the curve 0.963, 95% confidence interval 0.858 to 0.997) and for PVR of 8 WU a TRV/VTI RVOT value of 0.17 provided a sensitivity of 79.17% and a specificity of 95% (area under the curve 0. 0.923, 95% confidence interval 0.801 to 0.982).
Conclusions: Doppler-derived ratio of TRV/VTI RVOT is a simple, non-invasive index, which can be used to estimate PVR
The exponential series: an addendum
No full textIn the accompanying article, the author
(Gaurav Bhatnagar) presents a heuristic derivation
of the well-known series for the exponential function
How do we explain their success? understanding the formulas
Get PDFIn the accompanying article Approximating Square Roots and
Cube Roots, the author Ali Ibrahim Hussen has proposed
easy to use formulas for finding approximate values of the
square root and cube root of an arbitrary positive numbe
Analysis of the angle trisection procedure
No full textIn the article by Shri Manoranjan Ghoshal which appeared in At Right Angles, November 2021, it is mentioned that approximate procedures for trisection of arbitrary angles exist, and one such procedure (elegant and simple to execute) was presented by the author. In this article, we analyse this procedure
Approximate Angle Constructions
No full textIn an article elsewhere in this issue, the author gives a construction procedure which yields angles close to 20◦ and 40◦. In this article, we explain ‘why’ the procedure (depicted in Figure 1) gives good results and suggest an alternative procedure that gives better results
Congruency, A Trigonometric View
Get PDFI n the article “Another Theorem for Congruence of Triangles” by Kasi Rao Jagathapu [1], published in At Right Angles, March 2023, the author points to the need for formulating additional congruence theorems. (See also [2].) It may be useful to look at this question from a trigonometric point of view.
Suppose we are given two sides of a triangle and one of the angles. Under what circumstances do these parameters uniquely fix the triangle? We consider the different possibilities
Two New Proofs of the Pythagorean Theorem - Part I
No full textThe Pythagorean theorem (‘PT’ for short) is easily the best known result in all of mathematics. What is less well-known is the fact that among all theorems in mathematics, it holds the “world record” for the number of different proofs. There is no other theorem that even comes close! (See [2] and [3].) In the book The Pythagorean Proposition [1] (published in 1940), the author Elisha S. Loomis lists as many as 370 different proofs of the theorem. Since that time, close to a century back, still more proofs have appeare
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