Hessian matrix, specific heats, Nambu brackets, and thermodynamic geometry

As an extension to our earlier work \cite{Mirza2}, we employ the Nambu brackets to prove that the divergences of heat capacities correspond to their counterparts in thermodynamic geometry. We also obtain a simple representation for the conformal transformations that connect different thermodynamics metrics to each other. Using our bracket approach, we obtain interesting exact relations between the Hessian matrix with any number of parameters and specific heat capacities. Finally, we employ this approach to investigate some thermodynamic properties of the Meyers-Perry black holes with three spins.Comment: 14 pages, 12 figure

Sleep paralysis in medieval Persia – the Hidayat of Akhawayni (?–983 AD)

Among the first three manuscripts written in Persian, Akhawayni’s Hidayat al-muta’allemin fi al-tibb was the most significant work compiled in the 10th century. Along with the hundreds of chapters on hygiene, anatomy, physiology, symptoms and treatments of the diseases of various organs, there is a chapter on sleep paralysis (night-mare) prior to description and treatment of epilepsy. The present article is a review of the Akhawayni’s teachings on sleep paralysis and of descriptions and treatments of sleep paralysis by the Greek, medieval, and Renaissance scholars. Akhawayni’s descriptions along with other early writings provide insight into sleep paralysis during the Middle Ages in general and in Persia in particular

Blue swimming crab, <i>Portunus pelagicus</i> (Linnaeus, 1758) as monitors of mercury<span style="mso-bidi-font-family:TimesTen-Bold;mso-bidi-language:FA" lang="EN-US"> contamination from Persian Gulf, South Iran </span>

377-383Levels of mercury in tissues of blue swimming crab, Portunus pelagicus in the Persian Gulf coasts, south Iran were investigated. Hg analysis was performed by Atomic Absorption Spectrophotometer. Distribution pattern of Hg in the tissues of P. palagicus was as follows: hepatopancreasn > muscle > exoskeleton. Total mercury levels in the tissues of P. palagicus from the other six sampling stations ranged between (4.70 ± 0.80 μg/g) and (0.10 ± 0.07 μg/g). In present study recorded that there was negligible differences in Hg levels between P. pelagicus sexes. Maximum concentration of the total Hg in all tissues of P. pelagicus observes in Bahrekan station (P<0.05) during different seasons. There was significant difference (P<0.05) between the level of Hg in the tissues of the crab P. pelagicus. Differences in Hg levels could have resulted from diverse pollution source, ecological particularity, industries and human activities

Efficacy of ozone therapy on visual evoked potentials in diabetic patients

Abstract Background The involvement of the central nervous system is a frequent yet underestimated complication of diabetes mellitus. Visual evoked potentials (VEP) are a simple, sensitive, and noninvasive method for detecting early alterations in central optic pathways. The objective of this paralleled randomized controlled trial was to evaluate the impact of ozone therapy on visual pathways in diabetic patients. Methods Sixty patients with type 2 diabetes visiting clinics of Baqiyatallah university in Tehran (Iran) hospital were randomly assigned to two experimental groups: Group 1 (N = 30) undergoing a cycle of 20 sessions of systemic oxygen-ozone therapy in addition to standard therapy for metabolic control; Group 2 (N = 30)—serving as control—receiving only standard therapy against diabetes. The primary study endpoints were two VEP parameters; P100 wave latency and P100 amplitude at 3 months. Moreover, HbA1c levels were measured before the start of treatment and three months later as secondary study endpoint. Results All 60 patients completed the clinical trial. P100 latency significantly reduced at 3 months since baseline. No correlation was found between repeated measures of P100 wave latency and HbA1c (Pearson’s r = 0.169, p = 0.291). There was no significant difference between baseline values and repeated measures of P100 wave amplitude over time in either group. No adverse effects were recorded. Conclusions Ozone therapy improved the conduction of impulses in optic pathways of diabetic patients. The improved glycemic control following ozone therpay may not fully explain the reduction of P100 wave latency though; other mechanistic effects of ozone may be involved