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Chapayevsk, Russia

Gaidel A.V.,Samara State Aerospace University | Pervushkin S.S.,Samara State Medical University
Computer Optics | Year: 2013

In the paper method of the musculoskeletal system osteoporotic diseases computer diagnostics with a help of the femoral neck roentgenograms texture an alysisis proposed and researched. Problem of the texture features providing acceptable recognition quality selection is solved. Method work is researched on the real roentgenograms set with the known diagnoses. Researches results demonstrating a possibility to use proposed method in the clinical practice are adduced. During the work computer program designed both for proposed method research and for clinical diagnostics is developed. Source

Volobuev A.N.,Samara State Medical University
Technical Physics | Year: 2016

Electrodynamic principles of circular dichroism are developed using a concept of conducting circular structures in matter. A simplified representation of material equations for an optically active medium is obtained in the absence of a transition to the complex domain. A dependence of the absorption coefficient of a circular polarization as a component of the linearly polarized radiation on material parameters is found. Such parameters are analyzed to reveal a possibility of construction of a circular polaroid. © 2016, Pleiades Publishing, Ltd. Source

Pavlichenko A.,Russian National Research Medical University | Smirnova D.,Samara State Medical University
Asian Journal of Psychiatry | Year: 2012

Four influential papers that have appeared recently in the main psychiatric journals from Russia are summarized. The first paper examines socio-demographic profile and clinical manifestations and data of people with mental disorders attending the private psychiatric clinics. It was seen that about 50% of private mental health settings' patients had never consulted a public psychiatric service before seeking help at private psychiatric clinics. Private mental health services have proven their effectiveness in the treatment of non-psychotic disorders and intervention in early onset psychoses. The second paper describes neuropsychological and evolutionary approaches in understanding the comorbidity between depressive and anxiety disorders. It suggests that if anxiety disorder manifests as the first diagnosis, it is more likely that the person will have depression than vice versa. The next article concludes that there is a specific vulnerability of different groups of somatically ill patients to particular mental disorders: cancer is mainly associated with dissociative disorders and asthenia; patients with cardiac disorders are more likely to have comorbid anxiety disorders, hypochondriasis and severe depression. Patients with dermatological illnesses are more likely to have obsessive-compulsive disorder, delusional disorder and mild depression. The last paper discusses some social-psychological and neuro-immunological parameters of people with "dangerous" professions. Using mathematical method, the authors created a model that can decrease the negative influence of work-related extreme factors. © 2012 Elsevier B.V. Source

Williams P.L.,Harvard University | Sergeyev O.,Samara State Medical University | Lee M.M.,University of Massachusetts Medical School | Korrick S.A.,Harvard University | And 5 more authors.
Pediatrics | Year: 2010

OBJECTIVE: We evaluated the association of blood lead levels (BLLs) with pubertal onset in a longitudinal cohort of Russian boys. METHODS: A total of 489 Russian boys were enrolled in 2003-2005, at 8 to 9 years of age, and were monitored annually through May 2008. Cox proportional-hazards models were used to evaluate the association of BLLs at enrollment with time to pubertal onset during follow-up monitoring. RESULTS: A total of 481 boys had BLLs, with a median of 3 μg/dL and 28% with values of ≥5 μg/dL. The proportion of pubertal boys increased with age, from 12% at age 8 to 83% at age 12 for testicular volume of >3 mL, from 22% to 90% for genitalia stage 2 or higher, and from 4% to 40% for pubic hair stage 2 or higher. After adjustment for potential confounders including BMI and height, boys with high BLLs (≥5 μg/dL) had 24% to 31% reduced risk of pubertal onset, on the basis of testicular volume of >3 mL (hazard ratio [HR]: 0.73 [95% confidence interval [CI]: 0.55-0.97]; P = .03), genitalia staging (HR: 0.76 [95% CI: 0.59-0.98]; P = .04), and pubic hair staging (HR: 0.69 [95% CI: 0.44-1.07]; P = .10), compared with those with lower BLLs. Pubertal onset occurred 6 to 8 months later, on average, for boys with high BLLs, compared with those with BLLs of <5 μg/dL. CONCLUSION: Higher BLLs were associated with later pubertal onset in this prospective study of peripubertal Russian boys. Copyright © 2010 by the American Academy of Pediatrics. Source

Ovchinnikov E.L.,Samara State Medical University | Ivanov V.V.,Samara Engineering College
Journal of Physics: Conference Series | Year: 2011

The methodology of theoretical base of sound dosimetry is offered. The physiological approach to a problem is considered, is constructed bio- and psychophysical model of sound effects on human hearing, and values of comfortable, tolerable and destructive sound pressure and establishment its maximal levels. © 2011 Published under licence by IOP Publishing Ltd. Source

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