Learning Maximal Margin Markov Networks via Tractable Convex Optimization

Показано, что обучение марковской сети общего вида может быть представлено в виде задачи выпуклой оптимизации. Основная идея метода заключается в использовании LP-релаксации (max,+)-задачи непосредственно при формулировании задачи обучения.It is shown that the learning of a general Markov network can be represented as a convex optimization problem. The key idea of the method is to use a linear programming relaxation of the (max,+)-problem directly in the formulation of the learning problem.Показано, що навчання марківської мережі загального вигляду може бути подано у вигляді задачі опуклої оптимізації. Основна ідея методу полягає у використанні LP-релаксації (max,+)-задачі безпосередньо при формулюванні задачі навчання

The reasons for an unjustified visit by patients with somatoform disorders to general practitioners

Patients with somatoform disorders (SD) seek specialized psychiatric care late. Although many factors that prevent the timely visits by patients with SD for specialized psychiatric care are known, this problem requires further study.Objective: to analyze the role of information sources and iatrogenic factors in unreasonably selecting a specialist by patients with SD to visit him/her for primary medical advice.Patients and methods. Sixty-six women aged 19 to 40 years with new-onset SD (F 45.0) were examined. Two patient groups were identified: a study group of 41 patients (mean age, 31.5+1.2years) and a comparison group of 25 (mean age, 31.6+0.8years) (p>0.5). Primary care physicians had examined and treated the study group patients long (for 1 to 6 years) before their visit to a psychiatrist. The comparison group patients had been seen by a psychiatrist just in the first year of the disease.Anamnestic, clinical, andpsychopathological methods were used when examining the patients.Results and discussion. For their first visit, the patients with SD had selected a therapist and a neurologist more frequently and a cardiologist and an endocrinologist somewhat less frequently. This selection was also affected by the specialists' high titles, psychiatric consultation-avoiding behavior, and conversion mechanisms. Acquaintances' advice and Internet information as health information sources contribute to the unjustified revisits by these patients to primary medical specialists for a long time. Iatrogenic mechanisms were found to play a role in forming a false concept of a disease and destructive behavioral strategies leading to the chronization and progression of SD. Patients with SD who are long and ineffectively exposed to numerous diagnostic procedures and ineffective treatment in the primary health care need psychiatric counseling and psychotherapeutic support.Conclusion. The diagnosis of SD remains ineffective in an outpatient setting. There is a need for an educational program on SD within the continuing health education system

Surgical treatment method for nephroptosis

A new method of nephropexy with an autograft by the upper pole to the diaphragm from intercostal lumbotomy is described. The method induces little injury, is technically simple and can be employed in those patients who do not need a revision or surgery on the renal pelvis, ureter or vascular pedicle. The method was used in operations on 45 patients. Good immediate and remote results were obtained

Neuropsychological diagnostics of neurosarcoidosis

This article presents the results of neuropsychological studies of the patients with neurosarcoidosis. The obtained results show that typical manifestations of neurosarcoidosis are disorders of motor functions. They appear in the speed reduction of actions and their accuracy, which prove peripheral neuropathy and myopathy at the functional level as clinical signs of neurosarcoidosis. Specific manifestations of neurosarcoidosisare determinedby topographical localization of granulomatoma