scholarly journals Night sleep in toddlers

2021 ◽  
Vol 4 (2) ◽  
pp. 173-177
Author(s):  
M.I. Dubrovskaya ◽  
◽  
O.V. Ryazanova ◽  
O.K. Netrebenko ◽  
A.S. Botkina ◽  
...  

A regular restful sleep for a recommended time affects the quality of life and psychic/physical health and prevents cognitive, emotional, and somatic disorders. Meanwhile, the rate of nocturnal awakenings among toddlers is 20–66%. This paper reviews current data on night sleep in toddlers. Techniques for assessing sleep duration in children are addressed. Research findings demonstrate that the most important causes of sleep disturbances are breastfeeding, mother’s anxiety and depression, and sleeping with parents. Sleeping with parents is not only a culturological feature but also indicates potential problems in the family being a means of compensating for the lack of partner intimacy and family relations. Factors affecting sleep transition and sleep quality (including the specifics of food intake) are discussed. It was demonstrated that amino acids are important for falling asleep and sleep regulation. A high-carbohydrate diet is also beneficial. KEYWORDS: night sleep, toddlers, nocturnal awakenings, sleeping with parents, nutrition. FOR CITATION: Dubrovskaya M.I., Ryazanova O.V., Netrebenko O.K. et al. Night sleep in toddlers. Russian Journal of Woman and Child Health. 2021;4(2):173–177. DOI: 10.32364/2618-8430-2021-4-2-173-177.

Author(s):  
Hendarsita Amartiwi

This study scrutinize the factors affecting knowledge management, consisting of acquisition of knowledge, storage of knowledge, distribution of knowledge and use of knowledge, at Private Higher Education Institutions in Garut Regency.  The purpose of this study is to analyze the factors shaping the knowledge management.  By using a survey method with a quantitative approach, the unit of analysis of this study is lecturer at 14 Private Universities in Garut Regency, with 229 lecturers as respondents. Data is obtained from survey results through questionnaires distributed directly to lecturers. Data is processed using descriptive statistical analysis and Confirmatory Factor Analysis (CFA). The research findings showed that the use of knowledge and the storage of knowledge are the most powerful factors in knowledge management, followed by the acquisition of knowledge, and distribution of knowledge.


SLEEP ◽  
2021 ◽  
Vol 44 (Supplement_2) ◽  
pp. A211-A211
Author(s):  
Nyree Riley ◽  
Dana Alhasan ◽  
W Braxton Jackson ◽  
Chandra Jackson

Abstract Introduction Food insecurity may influence sleep through poor mental health (e.g., depression) and immune system suppression. Although prior studies have found food insecurity to be associated with poor sleep, few studies have investigated the food security-sleep association among racially/ethnically diverse participants and with multiple sleep dimensions. Methods Using National Health Interview Survey data, we examined overall, age-, sex/gender-, and racial/ethnic-specific associations between food insecurity and sleep health. Food security was categorized as very low, low, marginal, and high. Sleep duration was categorized as very short (<6 hours), short (<7 hours), recommended (7–9 hours), and long (≥9 hours). Sleep disturbances included trouble falling and staying asleep, insomnia symptoms, waking up feeling unrested, and using sleep medication (all ≥3 days/times in the previous week). Adjusting for sociodemographic characteristics and other confounders, we used Poisson regression with robust variance to estimate prevalence ratios (PRs) and 95% confidence intervals (95% CI) for sleep dimensions by very low, low, and marginal vs. high food security. Results The 177,435 participants’ mean age was 47.2±0.1 years, 52.0% were women, 68.4% were Non-Hispanic (NH)-White. Among individuals reporting very low food security, 75.4% had an annual income of <$35,000 and 60.3% were ≥50 years old. After adjustment, very low vs. high food security was associated with a higher prevalence of very short (PR=2.61 [95%CI: 2.44–2.80]) and short (PR=1.66 [95% CI: 1.60–1.72]) sleep duration. Very low vs. high food security was associated with both trouble falling asleep (PR=2.21 [95% CI: 2.12–2.30]) and trouble staying asleep (PR=1.98 [95% CI: 1.91–2.06]). Very low vs. high food security was associated with higher prevalence of very short sleep duration among Asians (PR=3.64 [95% CI: 2.67–4.97]), Whites (PR=2.73 [95% CI: 2.50–2.99]), Blacks (PR=2.03 [95% CI: 1.80–2.31]), and Hispanic/Latinxs (PR=2.65 [95% CI: 2.30–3.07]). Conclusion Food insecurity was associated with poor sleep in a diverse sample of the US population. Support (if any):


Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1273 ◽  
Author(s):  
Barry Mooney ◽  
Kyriakos Kourousis

Maraging steel is an engineering alloy which has been widely employed in metal additive manufacturing. This paper examines manufacturing and post-processing factors affecting the properties of maraging steel fabricated via laser powder bed fusion (L-PBF). It covers the review of published research findings on how powder quality feedstock, processing parameters, laser scan strategy, build orientation and heat treatment can influence the microstructure, density and porosity, defects and residual stresses developed on L-PBF maraging steel, with a focus on the maraging steel 300 alloy. This review offers an evaluation of the resulting mechanical properties of the as-built and heat-treated maraging steel 300, with a focus on anisotropic characteristics. Possible directions for further research are also identified.


Author(s):  
Abdul Munir Ismail Et.al

The study aims to highlight the current learning approaches used by postgraduate students to complete their postgraduate studies on time, as studies have shown many students have failed to finish their studies as planned. In particular, this study focuses on factors and methods that are perceived to be most effective by students to help them complete their studies on time.  Methodology: Thisstudy was based on a qualitative approach involving semi-structured interviews. The study sample consisted of 14 postgraduate students and one lecturers as respondents. The research instrument was based on interview questions to elicit relevant information on their demography and learning practices. Data were collected and organized into four themes and were subsequently analyzed descriptively.     Findings: The findings showed that face-to-face discussions were the most popular practice adopted by the respondents. The findings also showed several factors had significant impacts on student learning, such as interpersonal relationships between students and supervisors, commitment, financial commitment, and moral support, which needs to be taken into account in helping students to complete on time.     Significance: The research findings can inform all the stakeholders, notably students, supervisors, and administrative officers, factors that have profound impacts on postgraduate students’ efforts to graduate on time.


This study was conducted because of the low level of students’ reading skill. The reading strategies and the reading frequencies were assumed as the factors affecting students’ reading skill. The aim of this study was to describe and to analyze the contribution of reading strategies and reading frequencies toward students’ reading comprehension skill. This study used the quantitative method with the descriptive correlational design. The population was 3000 students who attended Bahasa Indonesia subject in Universitas Negeri Padang, and 353 students were taken as samples by using proportional stratified random sampling. The instruments of this study were reading strategies scale, reading frequencies scale and a reading comprehension test which has been valid and reliable. Based on research findings and discussion, the following can be concluded: (1) reading strategies contributed significance and positively to the students' comprehension reading skill which is 19.6% (R = 0.443 R2 = 0.196 and p = 0.000), i.e. reading strategies contributed directly toward the skills of reading comprehension. Therefore, the higher the reading strategies, the better the reading comprehension skills of the students; (2) reading strategies contributed significance toward the students' reading comprehension skills of 33.1% (R = 0.575 R2 = 0.331 and p = 0.000), i.e. reading frequencies contributed directly to reading comprehension skills. Therefore, the better the reading frequencies, the better the reading comprehension skills of the students; (3) reading strategies and the reading frequencies together contributed significance toward the students' reading comprehension skills of 33.2% (R = 0.575, R2 = 0.332 and p = 0.000), i.e. reading strategies and reading frequencies together contributed directly to the comprehension reading skill. Therefore, the higher the reading strategies and reading frequencies will be the better the reading comprehension skill of the students.


2021 ◽  
Vol 9 ◽  
Author(s):  
Sanna Lokhandwala ◽  
Jennifer F. Holmes ◽  
Gina M. Mason ◽  
Christine W. St. Laurent ◽  
Cassandra Delvey ◽  
...  

Sleep disturbances in early childhood are associated with mood and anxiety disorders. Children also exhibit sleep disruptions, such as nighttime awakenings, nightmares, and difficulties falling asleep, in conjunction with adverse events and stress. Prior studies have examined independently the role of sleep on adaptive processing, as well as the effects of stress on sleep. However, how childhood sleep and children's adaptive behavior (i.e., coping strategies) bidirectionally interact is currently less known. Using a within-subjects design and actigraphy-measured sleep from 16 preschool-aged children (Mage = 56.4 months, SD = 10.8, range: 36–70 months), this study investigated how prior sleep patterns relate to children's coping during a potentially stressful event, the COVID-19 pandemic, and how prior coping skills may influence children's sleep during the pandemic. Children who woke earlier had greater negative expression both before and during the pandemic. During the pandemic, children slept longer and woke later on average compared to before the pandemic. Additionally, for children engaged in at-home learning, sleeping longer was associated with less negative expression. These findings highlight how sleep behaviors and coping strategies are related, and the stability of this relationship under stress.


Author(s):  
Andrey Afonin ◽  
Evgeniy Olkhovik ◽  
Alexander Tezikov

The chapter presents a description of conventional and deep-water shipping routes within the water areas of the Northern Sea Route (NSR). There are provided the evaluation of the hydrographical survey of the Arctic Ocean seabed with respect to navigational safety along with the summary of the principal factors affecting the efficiency and safety of shipping in the polar water. The chapter discusses the current situation and major development tendencies of the NSR, in particular the forecasted growth of navigation intensity, increase of the shares of high ice-strengthened heavy-tonnage vessels and hazardous cargoes in transportation, and spread of the year-round navigation zone to the East. Some of the research findings obtained during the previous decade at the Arctic Faculty of Admiral Makarov State University of Maritime and Inland Shipping are provided. The assessment of the effects of shallows and ice on the working capacity of the NSR for deep-draft vessels is provided.


2020 ◽  
Vol 39 (4) ◽  
pp. 1127-1141 ◽  
Author(s):  
Marcell Baranyi ◽  
László Buday ◽  
Balázs Hegedűs

AbstractKRAS is one of the most commonly mutated oncogene and a negative predictive factor for a number of targeted therapies. Therefore, the development of targeting strategies against mutant KRAS is urgently needed. One potential strategy involves disruption of K-Ras membrane localization, which is necessary for its proper function. In this review, we summarize the current data about the importance of membrane-anchorage of K-Ras and provide a critical evaluation of this targeting paradigm focusing mainly on prenylation inhibition. Additionally, we performed a RAS mutation-specific analysis of prenylation-related drug sensitivity data from a publicly available database (https://depmap.org/repurposing/) of three classes of prenylation inhibitors: statins, N-bisphosphonates, and farnesyl-transferase inhibitors. We observed significant differences in sensitivity to N-bisphosphonates and farnesyl-transferase inhibitors depending on KRAS mutational status and tissue of origin. These observations emphasize the importance of factors affecting efficacy of prenylation inhibition, like distinct features of different KRAS mutations, tissue-specific mutational patterns, K-Ras turnover, and changes in regulation of prenylation process. Finally, we enlist the factors that might be responsible for the large discrepancy between the outcomes in preclinical and clinical studies including methodological pitfalls, the incomplete understanding of K-Ras protein turnover, and the variation of KRAS dependency in KRAS mutant tumors.


SLEEP ◽  
2019 ◽  
Vol 42 (12) ◽  
Author(s):  
Francisco M Acosta ◽  
Guillermo Sanchez-Delgado ◽  
Borja Martinez-Tellez ◽  
Jairo H Migueles ◽  
Francisco J Amaro-Gahete ◽  
...  

Abstract Study Objectives Short sleep duration and sleep disturbances have been related to obesity and metabolic disruption. However, the behavioral and physiological mechanisms linking sleep and alterations in energy balance and metabolism are incompletely understood. In rodents, sleep regulation is closely related to appropriate brown adipose tissue (BAT) thermogenic activity, but whether the same is true in humans has remained unknown. The present work examines whether sleep duration and quality are related to BAT volume and activity (measured by 18F-FDG) and BAT radiodensity in humans. Methods A total of 118 healthy adults (69% women, 21.9 ± 2.2 years, body mass index: 24.9 ± 4.7 kg/m2) participated in this cross-sectional study. Sleep duration and other sleep variables were measured using a wrist-worn accelerometer for seven consecutive days for 24 hours per day. The Pittsburgh Sleep Quality Index was used to assess sleep quality. All participants then underwent a personalized cold exposure to determine their BAT volume, activity, and radiodensity (a proxy of the intracellular triglyceride content), using static positron emission tomography combined with computed tomography (PET/CI) scan. Results Neither sleep duration nor quality was associated with BAT volume or activity (the latter represented by the mean and peak standardized 18F-FDG uptake values) or radiodensity (all p > .1). The lack of association remained after adjusting the analyses for sex, date of PET/CT, and body composition. Conclusions Although experiments in rodent models indicate a strong relationship to exist between sleep regulation and BAT function, it seems that sleep duration and quality may not be directly related to the BAT variables examined in the present work. Clinical Trial Registration NCT02365129 (ClinicalTrials.gov).


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