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Igor Stoma,Igor Karpov,Natalia Milanovich,Anatoly Uss,Igor Iskrov 대한혈액학회 2016 Blood Research Vol.51 No.2
BackgroundBloodstream infections (BSI) remain a frequent complication during the pre-engraftment period after hematopoietic stem cell transplantation (HSCT), resulting in high mortality rates. This study evaluated risk factors for mortality in hematopoietic stem cell transplant recipients with BSI in the pre-engraftment period.MethodsThis prospective case control study was performed at the Center of Hematology and Bone Marrow Transplantation in Minsk, Republic of Belarus. Data relating to patient age and gender, date and type of transplantation, conditioning chemotherapy regimen, micro-organisms isolated from blood, and antibacterial therapy were prospectively collected from all hematopoietic stem cell recipients with microbiologically proven cases of BSI in the pre-engraftment period. The primary outcome was all-cause 30-day mortality after onset of febrile neutropenia. ResultsA total of 135 adult patients with microbiologically proven BSI after HSCT were studied, with 65.2% of cases caused by gram-negative microorganisms and 21.5% by non-fer-menting bacteria. Inadequate empiric antibacterial therapy and isolation of carbape-nem-resistant non-fermenting gram-negative bacteria (Acinetobacter baumannii and Pseudomonas aeruginosa) were independently associated with increased all-cause 30-day mortality in these patients. ConclusionThe risk factors for mortality in adult patients with BSI in the pre-engraftment period after HSCT were inadequacy of empirical antibacterial therapy and isolation of carbapenem-re-sistant A. baumannii or P. aeruginosa.
The Effect of Methylphenidate on Neurological Soft Signs in ADHD
Igor Ondrejka,Igor Hrtanek,Ingrid Tonhajzerova,Eva Snircova,Tomas Kulhan,Ivan Farsky,Gabriela Nosalova 대한신경정신의학회 2015 PSYCHIATRY INVESTIGATION Vol.12 No.4
ObjectiveaaNeurological soft signs are very common in children with the attention deficit hyperactivity disorder (ADHD), and the first line medication of this disorder is methylphenidate. The aim of the study was to assess the effect of methylphenidate on the neurological soft signs in children and adolescents suffering from ADHD depending on the dose of methylphenidate. MethodsaaThirty five patients with ADHD were investigated by the ADHD RS-IV parent version questionnaire and the Revised Neurological Examination for Subtle Signs before treatment adjustment and after four weeks of methylphenidate medication. The changes in hyperactivity symptomatology, neurological soft signs during therapy and the influence of the methylphenidate dose were statistically analyzed. ResultsaaA significant decrease in hyperactivity symptomatology was found after one month of methylphenidate medication (p= 0.0001) and significant decrease in neurological soft signs was demonstrated in 21 from a total of 26 items (p<0.05). Correlation analysis showed no relationship between the dose of methylphenidate and the improvement of neurological soft signs. Similarly, the improvement of ADHD symptomatology had not correlation with the improvement of neurological soft signs. ConclusionaaThe study demonstrated the positive effect of methylphenidate on neurological soft signs in which improvement occurred independently of the dose, indicating that their progress may be due to methylphenidate treatment of any dose. The unrelated effect of methylphenidate on the attention deficit hyperactivity disorder and neurological soft signs suggest that methylphenidate might be useful in the therapy of clumsy child syndrome and in ADHD treatment of non-responders.
Igor Logetto Caetité Gomes,Diogo Turiani Hourneaux de Moura,Igor Braga Ribeiro,Sérgio Barbosa Marques,Alexandre de Sousa Carlos,Beanie Conceição Medeiros Nunes,Bruno Salomão Hirsch,Guilherme Henrique 대한소화기내시경학회 2024 Clinical Endoscopy Vol.57 No.2
Background/Aims: Radiofrequency ablation (RFA) is the first-line therapy for dysplastic Barrett’s esophagus (BE). Therefore, cryotherapy has emerged as an alternative treatment option. This study aimed to compare the efficacies of these two techniques based on the rates of complete eradication of intestinal metaplasia (CE-IM) and dysplasia (CE-D). Adverse events and recurrence have also been reported. Methods: An electronic search was conducted using the Medline (PubMed), Embase, LILACS, and Google Scholar databases until December 2022. Studies were included comparing cryotherapy and RFA for treating dysplastic BE with or without early esophageal neoplasia. This study was performed in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Results: Three retrospective cohort studies involving 627 patients were included. Of these, 399 patients underwent RFA, and 228 were treated with cryotherapy. There was no difference in CE-IM (risk difference [RD], –0.03; 95% confidence interval [CI], –0.25 to 0.19; p=0.78; I2=86%) as well as in CE-D (RD, –0.03; 95% CI, –0.15 to 0.09; p=0.64; I2=70%) between the groups. The absolute number of adverse events was low, and there was no difference in the recurrence rate. Conclusions: Cryotherapy and RFA were equally effective in treating dysplastic BE, with or without early esophageal neoplasia.
Satellite Navigation Systems, As The Development Of Digitalization Of The Marine Corridor
Vorokhobin, Igor,Burmaka, Igor,Ivanov, Oleksandr,Perepechayev, Sergiy,Naboka, Ivan,Kulakov, Maksym International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.11
In the article, an analysis of the factors was carried out, which injected into the efficiency of the function of navigation systems in the minds of unimportance. Carrying out analyzes allowing for the visibility of relevant direct adjustments to the effectiveness of the function Inertial navigation systems in the minds of non-value. The designation of the navigation system was assigned to a complex of navigation systems on ships processing of the vector of navigation parameters, so that they can be victorious in the control systems of the ship's collapse, and the safety of floating is safe.
Maritime Navigation System: Technological Solutions to Ensure The Safety Of Maritime Navigation
Burmaka, Igor,Vorokhobin, Igor,Chimshir, Valentin,Burmaka, Oleksiy,Smyrnova, Iryna,Danylenko, Oleksandr International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.9
The article assesses the level of navigation safety, in theoretical terms, defines the complexity of managing navigational risks in practice. The issues of assessing the navigational safety have been studied due to the importance and relevance of the issue in question, however, due to the great complexity of the problem under consideration, the article considers and indicates the directions for the development of the solution of the given direction, where, first of all, it became necessary to analyze the issue of assessing the levels of navigation risks when navigating vessels of various types in difficult navigation conditions.
Method of selecting vibro-isolation properties of vibration reduction systems
Igor Maciejewski,Tomasz Krzyzynski 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.4
An effective optimization method is proposed in this paper to determine the basic characteristics of non-linear visco-elastic elements used in passive vibration reduction systems. The developed method is examined by performing experimental investigations on the exemplary vibration reduction system, i.e., the passive seat suspension. The shaping of vibro-isolation properties is analyzed for different spectral classes of excitation signals.
The First Russo-Chinese Allied Treaty of 1896
Igor V. L UKOIANOV 고려대학교 한국사연구소 2007 International Journal of Korean History Vol.11 No.-
이 글은 러시아와 청의 대외정책이라는 맥락에서 1986년 러-청 조약의 준비 과정과 그 결과를 다루었다. 특히 두 나라가 이 조약을 통해 여러 가지 다양한 이익을 추구하였음을 밝히고자 하였다. 러시아의 입장에서 볼 때 러-청 조약은 러시아가 극동아시아에서 유리한 고지를 차지할 수 있는 기회였던 한편 경제적인 측면에서도 팽창(재정장관 S. lu. Witte의 계획)할 수 있는 기회였다. 그러나 청은 일본에 함께 대항할 수 있는 동맹국으로서 러시아를 택하였으며, 결국 러-청 조약은 잠재적으로 적이될 수 있는 나라들 간의 책략이었던 셈이다. 이 글에서는 특히 조약 체결과정에서 나타나는 청의 능동적인 외교책에 초점을 두었다. 러시아와의 연합과 관련한 청 조정내의 투쟁을 살펴 보기위해 카시니 조약(Cassini Convention) 등을 다루었다.
Simulation of Run-out caused by Imperfection of Ball Bearing for High-speed Spindle Units
Igor Aexeevich Zverev,In-Ung Eun,Won-Jee Chung,Choon-Man Lee 한국정밀공학회 2006 International Journal of Precision Engineering and Vol.7 No.3
For the purpose to improve and to automate designing of high-speed spindle units (SU's), we have developed the mathematical models and software to estimate SU performance characteristics, including the run-out of spindles running on ball bearings. In order to understand better the mechanics of high-speed SUs, the dynamic interaction of ball bearings and SU, and the influence of the bearing imperfections and SU's operational conditions on the run-out, we have carried out computer simulation and experimental studies. Through the study of SU's, we have found out that run-out of SU can vary drastically with variation of rpm. The influences of rotation speed and of accuracy parameters of bearings on the SU accuracy have the greatest importance. The influence of bearing preload has a secondary importance. Comparison of the results of these studies has demonstrated adequacy of the models and software developed to the real SU's.
An Elastic Deformation Model of High-speed Spindle Units
Igor Aexeevich Zverev,In-Ung Eun,Young-Kug Hwang,Won Jee Chung,Choon Man Lee 한국정밀공학회 2006 International Journal of Precision Engineering and Vol.7 No.3
This paper presents an elastic deformation model of a spindle unit (S/U), which takes into account the non-linear properties of high-speed ball bearings (particularly the effect of high rotational speed). For this, a software for the estimation of the S/U elastic deformation properties was developed and intended for use by S/U designers. A computer aided analysis of the model using the developed software was carried out and experiments showed the significant effect of rotational speed, cutting load and bearing axial preload, and showed some new phenomena, from which the criteria for the choice of bearing axial preload is given.