1,361 research outputs found
Russel — Silver syndrome a 7-month-old child: case report
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N.R. Khafizova, D.R. Merzlyakova, Yu.F. Safina
Bashkir State Medical University, Ufa, Russian Federation
Russel – Silver syndrome (RSS) is a hereditary disease manifesting with intrauterine growth retardation, dwarfism, and other stigmas of embryopathy. We describe this rare genetic condition in a 7-month-old baby. The changes in physical condition and neurological status, clinical signs, laboratory tests, and management strategy are addressed. A genetic condition was suggested through an arrested development and stigmas of embryopathy only at the age of 7 months. At the age of 5 months, hydrocephaly was suspected due to asymmetrical proportions of the body (the relatively large size of head compared to a small body). However, neurosonography ruled out this diagnosis. Genetic testing for microsatellite loci on chromosome 7, which identified abnormal methylation of H19 gene verified the final diagnosis.
Keywords: Russel – Silver syndrome, child, intrauterine growth retardation, pseudohydrocephalus, dwarfism, genetic counseling.
For citation: Khafizova N.R., Merzlyakova D.R., Safina Yu.F. Russel – Silver syndrome a 7-month-old child: case report. Russian Journal of Woman and Child Health. 2021;4(1):103–105. DOI: 10.32364/2618-8430-2021-4-1-103-105.
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Preterm infant born after in vitro fertilization: case report
No full textPreterm infant born after in vitro fertilization: case report
N.A. Druzhinina, L.D. Panova, D.R. Merzlyakova, G.P. Shiryaeva
Bashkir State Medical University, Ufa, Russian Federation
Recent studies demonstrate that children born after in vitro fertilization (IVF) are at higher risks of various unfavorable conditions including low Apgar scores, complications of neonatal adaptation, and intraventricular hemorrhage, a disorder specific for preterm children. The results are greater hospital stay and further hospital admissions. Factors provoking these complications are still controversial. Among them are medications and methods for infertility, or reproductive system disorders accompanying pregnancy after IVF. It is still disputable whether health impairments in children result from mothers’ extragenital and gynecological comorbidities or IVF itself.
The paper addresses clinical case illustrating management strategy of a preterm infant born after IVF considering the issues of extreme morphological and functional immaturity. Preterm infant management and providing favorable conditions for their feeding considering corrected age are the primary task for pediatricians. Knowing of the specifics of growth and development of preterm infants is of particular importance in daily clinical practice.
Keywords: children health, assisted reproductive treatment, IVF, prematurity, extremely low birth weight.
For citation: Druzhinina N.A., Panova L.D., Merzlyakova D.R., Shiryaeva G.P. Preterm infant born after in vitro fertilization: case report. Russian Journal of Woman and Child Health. 2019;2(2):151–154.<br
Polymer multimode waveguide optical and electronic PCB manufacturing
No full textThe paper describes the research in the £1.3 million IeMRC Integrated Optical and Electronic Interconnect PCB Manufacturing (OPCB) Flagship Project in which 8 companies and 3 universities carry out collaborative research and which was formed and is technically led by the author. The consortium’s research is aimed at investigating a range of fabrication techniques, some established and some novel, for fabricating polymer multimode waveguides from several polymers, some formulations of which are being developed within the project. The challenge is to develop low cost waveguide manufacturing techniques compatible with commercial PCB manufacturing and to reduce their alignment cost. The project aims to take the first steps in making this hybrid optical waveguide and electrical copper track printed circuit board disruptive technology widely available by establishing and incorporating waveguide design rules into commercial PCB layout software and transferring the technology for fabricating such boards to a commercial PCB manufacturer. To focus the research the project is designing an optical waveguide backplane to tight realistic constraints, using commercial layout software with the new optical design rules, for a demonstrator into which 4 daughter cards are plugged, each carrying an aggregate of 80 Gb/s data so that each waveguide carries 10 Gb/s
The assessment of bone strength based on the results of ultrasound densitometry in infants born after in vitro fertilization (IVF) weighing less than 1500 g
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D.R. Merzlyakova1,2, N.R. Hafizova1, G.A. Vakhitova1, Z.A. Shangareeva1, G.G. Gilyazova2, A.I. Nazarova1
1Bashkir State Medical University, Ufa, Russian Federation
2Republican Children's Clinical Hospital, Ufa, Russian Federation
Aim: to assess the status of bone mineral density (BMD) using the ultrasound densitometry as a screening technique in premature in vitro fertilization (IVF) and non-IVF infants weighing less than 1500 g at birth.
Patients and Methods: the study included 189 premature babies who stayed in the department for newborns and premature infants with health problems. The infants were divided into two groups, depending on the IVF use: born through the IVF or conceived naturally. Each of the groups was divided into two subgroups based on the infant weight at birth: subgroups A consisted of very low birth weight (VLBW) babies and subgroups B consisted of extremely low birth weight (ELBW) babies. The first group (n=101) consisted of IVF-infants, 52 and 49 of them were included in subgroups 1A and 1B, respectively. The second group (comparison, n=88) consisted of the naturally conceived infants, 46 and 42 of them were included in subgroups 2A and 2B, respectively. BMD was measured using the ultrasound densitometry method. The evaluated parameters comprised the speed of sound (SOS) and Z-score, representing the difference in BMD between the studied infants and the mean BMD of other children of the same age and gender (standard deviation (SD) for the tibia). Z-score <-1 SD (SOS <10‰ and >3‰) was associated with a low bone density and Z-score <-2 SD (SOS <3‰) – with a clinically significant low bone density.
Results: the normal values of bone density were found in 39 (38.6%) infants of group 1 and 58 (65.9%) infants of group 2 (p>0.05). In the group 1 infants a decrease in bone density was found more frequently than in the group 2 infants: 49 (48.5%) and 21 (23.8%), respectively, p<0.05, and the difference was statistically significant (<-1SD). A clinically significant low bone density (SOS <3‰) found in 13 (12.8%) IVF-babies. The extremely low birth weight (ELBW) in IVF-babies is a risk factor for osteopenia and osteoporosis.
Conclusion: a significant decrease in the bone density values (SOS <10‰ and >3‰) was found in IVF-infants as compared to those in naturally conceived infants. A clinically significant decrease in bone density in premature IVF-infants with ELBW was reported in 12.8% of cases. The early diagnosis of osteopenia can be established by using a safe technique — the ultrasound densitometry.
Keywords: bone mineral density, densitometry, in vitro fertilization, IVF, premature babies, osteopenia, bone tissue, screening, very low birth weight, extremely low birth weight.
For citation: Merzlyakova D.R., Hafizova N.R., Vakhitova G.A. et al. The assessment of bone strength based on the results of ultrasound densitometry in infants born after in vitro fertilization (IVF) weighing less than 1500 g. Russian Journal of Woman and Child Health. 2023;6(1):34–38 (in Russ.). DOI: 10.32364/2618-8430-2023-6-1-34-38.
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Regional strategy of preservation and strengthening of the psychological health of participants of educational relations
No full textThe problem of saving and improving psychological health of educational relations' participants can be considered crucial. This article looked at several approaches to systemic analysis of various factors influencing psychological health of educational relations' participants in a negative way. We identified these factors by the levels they emerge at, namely: the level of learner himself/herself, the level of his/her social environment (teachers and parents), as well as educational institution, municipality and region. It is only possible to save and improve psychological health of educational relations' participants if systemic risk factors are eliminated at every level. Unsolved contradictions of the higher level "descend" to lower levels and require additional efforts to eliminate their effect. The article introduces the notion of learners’ “psychological health standards” that implies a system of socio-psychological, pedagogical, administrative, and technical conditions for saving and improving psychological health
Regional strategy of preservation and strengthening of the psychological health of participants of educational relations
No full textThe problem of saving and improving psychological health of educational relations' participants can be considered crucial. This article looked at several approaches to systemic analysis of various factors influencing psychological health of educational relations' participants in a negative way. We identified these factors by the levels they emerge at, namely: the level of learner himself/herself, the level of his/her social environment (teachers and parents), as well as educational institution, municipality and region. It is only possible to save and improve psychological health of educational relations' participants if systemic risk factors are eliminated at every level. Unsolved contradictions of the higher level "descend" to lower levels and require additional efforts to eliminate their effect. The article introduces the notion of learners’ “psychological health standards” that implies a system of socio-psychological, pedagogical, administrative, and technical conditions for saving and improving psychological health.</jats:p
The Chance and Probability Concepts Project
No full textThis article, created by D.R. Green, describes an investigation of what concepts and intuitions concerning random processes are present in the minds of children of varying abilities across the 11-16 age range. The ability to list permutations, combinations and arrangements is also being investigated. The author states, "Over the past two decades the topic of 'Probabilityâ has been brought into the mathematics curriculum but it may be that this is more an empty gesture rather than a sound strategy." This article can help to alleviate many of the struggles in teaching probability concepts. The article is pitched at a more elementary audience, but is still a perfect resource for almost anyone teaching in the field
Achieving 10 ps coincidence time resolution in TOF-PET is an impossible dream
No full textGreen Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.RST/Radiation, Science and TechnologyRST/Medical Physics & Technolog
Bepalen van het massatraagheidsmoment met behulp van een bifilar pendulum: Determining the moments of inertia using a bifilar pendulum
No full textThe aim of this thesis is to investigate the use of a bifilar pendulum for determining the moments of inertia of the TU Delft solar boat and to quantitatively predict the estimates. In the first part, several methods are discussed which can be applied in deriving the equations of motion of the pendulum. A new method, Kane's method, will be introduced. In the second part, this method will be used to derive the actual equations of motion. These equations are linearized around of the the pendulum's stationary positions to obtain expressions which link the moment of inertia about an axis to the period of oscillation of the pendulum about that axis. These equations are subsequently applied to the solar boat to derive estimates for the moments of inertia about the principle axis of the boat. The results of this thesis considers three different configurations of the bifilar pendulum with the solar boat suspended. One of these configurations results in the most accurate estimates for the moments of inertia, however, these have not been quantitatively predicted. The author suggests a modification in the definition of the bifilar pendulum such that this might be possible.Electrical Engineering, Mathematics and Computer ScienceNumerical analysi
An introduction to management science: quantitative approaches to decision making
No full textRetaining the accessible application-driven approach for which An Introduction to Management Science is highly regarded, adapting author Mik Wisniewski has carefully reworked the existing US textbook to benefit students across the UK, Europe, Middle East and Africa. Packed with diverse realistic examples from Scotland to Saudi Arabia, the landmark text from the ASW team is now available in a truly internationalised version for students studying Management Science and Operations Research at postgraduate and undergraduate level
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