814 research outputs found

    Collection of Mutually Synchronized Chaotic Systems

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    A general explicit coupling for mutual synchronization of two arbitrary identical continuous systems is proposed. The synchronization is proved analytically. The coupling is given for all 19 systems from Sprott's collection. For one of the systems the numerical results are shown in detail. The method could be adopted for the teaching of the topic.Comment: Published in Physics Letters A 352 (2006) 222-22

    ΠœΠ°Ρ€ΠΊΠ΅Ρ€Ρ‹ ΡΠ½Π΄ΠΎΡ‚Π΅Π»ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ дисфункции ΠΈ воспалСния ΠΏΡ€ΠΈ идиопатичСском Ρ‚Ρ€ΠΎΠΌΠ±ΠΎΠ·Π΅ Π³Π»ΡƒΠ±ΠΎΠΊΠΈΡ… Π²Π΅Π½

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    Idiopathic deep vein thrombosis is a process of venous thrombosis with the absence of challenging factors (thrombophilia, cancer, immobilization, trauma, surgical intervention etc.). In the present study, the admission values of the endothelium dysfunction and inflammation markers have been assayed in 78 patients with idiopathic deep vein thrombosis. The nitric oxide circulating level was reduced by 56.3% that correlated with a flow mediated brachial artery dilation decrease by 47% and with a carotid artery intima-media thickness rise by 77.6%. Likewise, an evident activation of inflammatory response has been attested that was manifested by an increase in serum levels of C reactive protein and IL-6 by 3.14 and 4.7 times. Thus, the shifting markers indicate a pathogenic role of endothelium dysfunction and inflammation in idiopathic deep vein thrombosis evolution, yet, on the other hand, they can be used as diagnostic and prognostic predictors of the malady.Π˜Π΄ΠΈΠΎΠΏΠ°Ρ‚ΠΈΡ‡Π΅ΡΠΊΠΈΠΉ Ρ‚Ρ€ΠΎΠΌΠ±ΠΎΠ· Π³Π»ΡƒΠ±ΠΎΠΊΠΈΡ… Π²Π΅Π½ прСдставляСт собой процСсс Π²Π΅Π½ΠΎΠ·Π½ΠΎΠ³ΠΎ Ρ‚Ρ€ΠΎΠΌΠ±ΠΎΠ·Π° Π² условиях отсутствия ΠΏΡ€ΠΎΠ²ΠΎΡ†ΠΈΡ€ΡƒΡŽΡ‰ΠΈΡ… Ρ„Π°ΠΊΡ‚ΠΎΡ€ΠΎΠ² (тромбофилия, ΠΎΠΏΡƒΡ…ΠΎΠ»ΡŒ, иммобилизация, Ρ‚Ρ€Π°Π²ΠΌΠ°, хирургичСскоС Π²ΠΌΠ΅ΡˆΠ°Ρ‚Π΅Π»ΡŒΡΡ‚Π²ΠΎ ΠΈ Π΄Ρ€.). Π’ Π΄Π°Π½Π½ΠΎΠΌ исслСдовании ΠΎΠΏΡ€Π΅Π΄Π΅Π»ΡΠ»ΠΎΡΡŒ Π·Π½Π°Ρ‡Π΅Π½ΠΈΠ΅ ΠΌΠ°Ρ€ΠΊΠ΅Ρ€ΠΎΠ² ΡΠ½Π΄ΠΎΡ‚Π΅Π»ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ дисфункции ΠΈ воспалСния Ρƒ 78 Π±ΠΎΠ»ΡŒΠ½Ρ‹Ρ… с идиопатичСским Ρ‚Ρ€ΠΎΠΌΠ±ΠΎΠ·Π΅ Π³Π»ΡƒΠ±ΠΎΠΊΠΈΡ… Π²Π΅Π½ ΠΏΡ€ΠΈ поступлСнии. Π¦ΠΈΡ€ΠΊΡƒΠ»ΠΈΡ€ΡƒΡŽΡ‰ΠΈΠΉ ΡƒΡ€ΠΎΠ²Π΅Π½ΡŒ окиси Π°Π·ΠΎΡ‚Π° Π±Ρ‹Π» сниТСн Π½Π° 56,3%, Ρ‡Ρ‚ΠΎ ΠΊΠΎΡ€Ρ€Π΅Π»ΠΈΡ€ΠΎΠ²Π°Π»ΠΎ с ΡƒΠΌΠ΅Π½ΡŒΡˆΠ΅Π½ΠΈΠ΅ΠΌ показатСля Ρ€Π°ΡΡˆΠΈΡ€Π΅Π½ΠΈΡ ΠΏΠ»Π΅Ρ‡Π΅Π²ΠΎΠΉ Π°Ρ€Ρ‚Π΅Ρ€ΠΈΠΈ Π½Π° 47% ΠΈ с ΡƒΠ²Π΅Π»ΠΈΡ‡Π΅Π½ΠΈΠ΅ΠΌ Ρ‚ΠΎΠ»Ρ‰ΠΈΠ½Ρ‹ ΠΈΠ½Ρ‚ΠΈΠΌΡ‹-ΠΌΠ΅Π΄ΠΈΠΈ сонной Π°Ρ€Ρ‚Π΅Ρ€ΠΈΠΈ Π½Π° 77,6%. Π’Π°ΠΊΠΆΠ΅ выявлСна выраТСнная активация Π²ΠΎΡΠΏΠ°Π»ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΠ³ΠΎ ΠΎΡ‚Π²Π΅Ρ‚Π°, Ρ‡Ρ‚ΠΎ ΡΠΎΠΏΡ€ΠΎΠ²ΠΎΠΆΠ΄Π°Π»ΠΎΡΡŒ ΠΏΠΎΠ²Ρ‹ΡˆΠ΅Π½ΠΈΠ΅ΠΌ содСрТания Π² ΠΊΡ€ΠΎΠ²ΠΈ Π‘-Ρ€Π΅Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΠ³ΠΎ Π±Π΅Π»ΠΊΠ° ΠΈ ΠΈΠ½Ρ‚Π΅Ρ€Π»Π΅ΠΉΠΊΠΈΠ½Π°-6. Π’Π°ΠΊΠΈΠΌ ΠΎΠ±Ρ€Π°Π·ΠΎΠΌ, ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΠΌΠ°Ρ€ΠΊΠ΅Ρ€ΠΎΠ² ΡƒΠΊΠ°Π·Ρ‹Π²Π°Π΅Ρ‚ Π½Π° ΠΏΠ°Ρ‚ΠΎΠ³Π΅Π½Π΅Ρ‚ΠΈΡ‡Π΅ΡΠΊΡƒΡŽ Ρ€ΠΎΠ»ΡŒ ΡΠ½Π΄ΠΎΡ‚Π΅Π»ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ дисфункции ΠΈ воспалСния Π² Ρ€Π°Π·Π²ΠΈΡ‚ΠΈΠΈ идиопатичСского Ρ‚Ρ€ΠΎΠΌΠ±ΠΎΠ·Π° Π³Π»ΡƒΠ±ΠΎΠΊΠΈΡ… Π²Π΅Π½, Π° Ρ‚Π°ΠΊΠΆΠ΅ Π½Π° Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ ΠΈΡ… использования Π² качСствС диагностичСских ΠΈ прогностичСских ΠΏΡ€Π΅Π΄ΠΈΠΊΡ‚ΠΎΡ€ΠΎΠ² Π±ΠΎΠ»Π΅Π·Π½ΠΈ

    Monte Carlo Methods for Process Algebra

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    AbstractWe review the recently developed technique of Monte Carlo model checking and show how it can be applied to the implementation problem for I/O Automata. We then consider some open problems in applying Monte Carlo techniques to other process-algebraic problems, such as simulation and bisimulation

    Дисфункция синусового ΡƒΠ·Π»Π°: диагностика ΠΈ Π»Π΅Ρ‡Π΅Π½ΠΈΠ΅

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    Institute of Cardiology, Congresul III al Medicilor de Familie din Republica Moldova, 17–18 mai, 2012, ChişinΔƒu, Republica Moldova, ConferinΕ£a NaΕ£ionalΔƒ β€žMaladii bronhoobstructive la copii”, consacratΔƒ profesorului universitar, doctor habilitat Victor GheΕ£eul, 27 aprilie, ChişinΔƒu, Republica MoldovaSinus node dysfunction (SND) refers to abnormalities in sinus node impulse formation and propagation, and includes sinus bradycardia, sinus pause/arrest, chronotropic incompetence, and sinoatrial exit block. SND is frequently associated with conduction system disease in the heart and various supraventricular tachyarrhythmias, such as atrial fibrillation and atrial flutter. When associated with supraventricular tachyarrhythmias, SND is often termed tachy-brady syndrome. Although SND may occur at any age, it is primarily a disease of the elderly and, presumably, related to the senescence of the sinus node, which is often accompanied with the senescence of the atrium and the conduction system in the heart. When SND occurs earlier in life, it is often secondary to other cardiac disease processes. The natural history of SND may be highly variable, although it tends to be progressive in nature. The only effective treatment for patients with chronic symptomatic SND is pacemaker therapy. Asymptomatic patients do not require therapy.Дисфункция синусового ΡƒΠ·Π»Π° (Π”Π‘Π£), относится ΠΊ аномалиям Π² производствС ΠΈ распространСнии ΠΈΠΌΠΏΡƒΠ»ΡŒΡΠΎΠ² ΠΎΡ‚ синусового ΡƒΠ·Π»Π° ΠΈ Π²ΠΊΠ»ΡŽΡ‡Π°Π΅Ρ‚ ΡΠΈΠ½ΡƒΡΠΎΠ²ΡƒΡŽ Π±Ρ€Π°Π΄ΠΈΠΊΠ°Ρ€Π΄ΠΈΡŽ, ΡΠΈΠ½ΡƒΡΠ°Π»ΡŒΠ½ΡƒΡŽ ΠΏΠ°ΡƒΠ·Ρƒ/стоп (остановку), ΡΠΈΠ½ΠΎΠ°Ρ‚Ρ€ΠΈΠ°Π»ΡŒΠ½ΡƒΡŽ Π±Π»ΠΎΠΊΠ°Π΄Ρƒ ΠΈ Ρ…Ρ€ΠΎΠ½ΠΎΡ‚Ρ€ΠΎΠΏΠ½ΡƒΡŽ Π½Π΅ΠΊΠΎΠΌΠΏΠ΅Ρ‚Π΅Π½Ρ‚Π½ΠΎΡΡ‚ΡŒ. Π”Π‘Π£ часто ассоциируСтся с Π·Π°Π±ΠΎΠ»Π΅Π²Π°Π½ΠΈΠ΅ΠΌ проводящСй систСмы сСрдца ΠΈ с Ρ€Π°Π·Π»ΠΈΡ‡Π½Π½Ρ‹ΠΌΠΈ суправСнтрикулярными тахиаритмиями, Ρ‚Π°ΠΊΠΈΠ΅ ΠΊΠ°ΠΊ фибрилляция прСдсСрдий ΠΈ Ρ‚Ρ€Π΅ΠΏΠ΅Ρ‚Π°Π½ΠΈΠ΅ прСдсСрдий. Ассоциация Π”Π‘Π£ с суправСнтрикулярной Ρ‚Π°Ρ…ΠΈΠ°Ρ€ΠΈΡ‚ΠΌΠΈΠ΅ΠΉ называСтся Ρ‚Π°Ρ…ΠΈ-Π±Ρ€Π°Π΄ΠΈΠΊΠ°Ρ€Π΄ΠΈΠ°Π»ΡŒΠ½Ρ‹ΠΌ синдромом. Π₯отя Π”Π‘Π£ ΠΌΠΎΠΆΠ΅Ρ‚ ΠΏΡ€ΠΎΡΠ²Π»ΡΡ‚ΡŒΡΡ Π² любом возрастС, являСтся Π΄ΠΎΠΌΠΈΠ½Π°Π½Ρ‚Π½Ρ‹ΠΌ Π·Π°Π±ΠΎΠ»Π΅Π²Π°Π½ΠΈΠ΅ΠΌ ΠΏΠΎΠΆΠΈΠ»Ρ‹Ρ…, связанноС с Π΄Π΅Π³Π΅Π½Π΅Ρ€Π°Ρ‚ΠΈΠ²Π½Ρ‹ΠΌΠΈ измСнСниями ΠΊΠ»Π΅Ρ‚ΠΎΠΊ синусового ΡƒΠ·Π»Π°, ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ΅ часто Π½Π°Π±Π»ΡŽΠ΄Π°Π΅Ρ‚ΡΡ Ρƒ ΠΏΠΎΠΆΠΈΠ»Ρ‹Ρ… людСй. Π”Π‘Π£ Ρƒ ΠΌΠΎΠ»ΠΎΠ΄Ρ‹Ρ…, часто Π²Ρ‚ΠΎΡ€ΠΈΡ‡Π½Π° Π΄Ρ€ΡƒΠ³ΠΈΠΌ болСзням сСрдца. ЕстСствСнная история Π”Π‘Π£ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ Ρ‡Ρ€Π΅Π·Π²Ρ‹Ρ‡Π°ΠΉΠ½ΠΎ Ρ€Π°Π·Π½ΠΎΠΎΠ±Ρ€Π°Π·Π½Π°, хотя ΠΈ ΠΈΠΌΠ΅Π΅Ρ‚ Ρ‚Π΅Π½Π΄Π΅Π½Ρ†ΠΈΡŽ ΠΊ ΠΏΡ€ΠΎΠ³Ρ€Π΅ΡΡΠΈΡ€ΠΎΠ²Π°Π½ΠΈΡŽ. ЕдинствСнным эффСктивным ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ лСчСния Π±ΠΎΠ»ΡŒΠ½Ρ‹Ρ… с симптоматичСской хроничСской Π±Ρ€Π°Π΄ΠΈΠ°Ρ€ΠΈΡ‚ΠΌΠ΅ΠΉ являСтся имплантация ЭКБ. БСссимптомныС ΠΏΠ°Ρ†ΠΈΠ΅Π½Ρ‚Ρ‹ Π½Π΅ Π½ΡƒΠΆΠ΄Π°ΡŽΡ‚ΡΡ Π² Π»Π΅Ρ‡Π΅Π½ΠΈΠΈ

    Myocardial infarction: progress and achievements

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    Department of Emergency and Cardiac Rhythm Disorders, Institute of Cardiology, Chisinau, the Republic of MoldovaBackground: Myocardial infarction (MI) remains a major health care and economic burden in Moldova. In the last decades in many countries the epidemiological studies have shown the reduction of MI related mortality. This reduction has partially been attributed to the new pharmacological and medical equipment advances that have been used during MI treatment. Despite a tangible improvement in the outcomes, MI remains a frequent cause of morbidity and mortality, what justifies the quest to find the new therapeutic approaches. Many patients with MI die from sudden death, which occurs outside the medical institutions. Conclusions: At present there are fewer chances of the extensive infarctions complicated with severe heart failure and ventricular wall rupture. The methods of early reperfusion have resulted in a marked improvement in the treatment of myocardial infarction associated with ST segment elevation, but have only slightly influenced the prognosis of extensive infarctions associated with ST segment depression. The ways to reduce the delay in doing coronary angioplasty after MI onset include the early recognition of symptoms by patients and by means of prehospital diagnosis. A major problem still remains the problem of late coming to the clinics of the patients with acute myocardial infarction. The low level of health education of the population, its ignorance of the disease onset signs has a negative impact on the possibility of preventing the severe complications
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