bluuebunny/crossref_metadata_2025_split huggingface dataset:
Unilateral Plyometric Training is Superior to Volume-Matched Bilateral Training for Improving Strength, Speed and Power of Lower Limbs in Preadolescent Soccer Athletes
Authors: Drouzas Vasileios , Katsikas Christos , Zafeiridis Andreas , Jamurtas Athanasios Z. , Bogdanis Gregory C. 
Published: April 2021

Abstract
This study compared the effects of unilateral and bilateral plyometric training on strength, sprint performance and lower limb power. Sixty-eight preadolescent soccer athletes were randomly assigned to a unilateral plyometric training group (n=23), a bilateral plyometric training group (n=23) and a control group (n=22). Both plyometric training groups trained with equal volumes of unilateral or bilateral exercises for 15 minutes in each session, at which time the control group performed soccer-specific drills. Plyometric exercises were executed twice weekly for 10 weeks during the competitive season. The following tests were performed before and after the intervention: single-leg and double-leg countermovement jump, squat jump, horizontal jumps in different directions, maximal isometric strength of quadriceps and hamstrings, sprint performance, agility and balance. Unilateral plyometric training resulted in greater improvements compared to the control group in the following variables: hamstrings strength (ES: 0.91, p=0.037), 5m sprint time (ES: 0.93, p=0.004), single-leg countermovement jump (ES: 0.90, p=0.006), single- and double-leg squat jump (ES: 0.87, p=0.030 and ES: 0.73, p=0.067, respectively) and single-leg hop performance (ES: 1.01, p=0.004). The only tests where there was an improvement of BPT compared with the CG were the single-leg and double leg SJ (ES: 0.76, p=0.026; ES: 0.70, p=0.050). Quadriceps strength, side hop test, double-leg horizontal jump test, flamingo balance test and modified agility T-test were equally improved in all three groups (p<0.001). In conclusion, unilateral lower-limb plyometric training is more effective in increasing muscle strength and power in preadolescent soccer players when compared to bilateral training or soccer training alone.
Resistance Exercise Intensity Does Not Influence Neurotrophic Factors Response in Equated Volume Schemes
Authors: Lodo Leandro , Moreira Alexandre , Bacurau Reury Frank P , Capitani Carol D , Barbosa Wesley P , Massa Marcelo , Schoenfeld Brad J , Aoki Marcelo S 
Published: April 2021

Abstract
The aim of the present study was to evaluate the effects of 2 different intensities of resistance training (RT) bouts, performed with the equated total load lifted (TLL), on the acute responses of neurotrophic factors (NFs) (brain-derived neurotrophic factor [BDNF]; and nerve growth factor [NGF]), as well as on metabolic (lactate concentration) and hormonal (salivary cortisol concentration) responses. Thirty participants (males, 22.8 ± 2.3 years old, 177 ± 6.8 cm, 75.5 ± 7.9 kg, n = 15; and females, 22.2 ± 1.7 years, 163.7 ± 6.5 cm, 57 ± 7.6 kg, n = 15) performed 2 separate acute RT bouts with one week between trials. One bout consisted of 4 sets of 5 submaximal repetitions at 70% of 1RM and the other of 4 sets of 10 submaximal repetitions at 35% of 1RM for each exercise. Both RT bouts were conducted using the bench press and squat exercises. The TLL in each bout (determined by sets x repetitions x load [kg]) was equated. Serum BDNF, serum NGF, salivary cortisol, and blood lactate concentration were determined pre- and post-RT. No significant pre- to post-exercise increase in neurotrophic factors (p > 0.05; BDNF; effect size = 0.46 and NGF; effect size = 0.48) was observed for either of the RT bouts. A similar increase in blood lactate concentration was observed pre- to post-exercise for both RT bouts (p < 0.05). Cortisol increased similarly for both RT bouts, when compared to the resting day condition (p < 0.05). In conclusion, the results suggest that, despite differences in RT schemes, a similar acute neurotrophic, metabolic and hormonal response was observed when the TLL is equated.
Different Shoulder Exercises Affect the Activation of Deltoid Portions in Resistance-Trained Individuals
Authors: Campos Yuri A. C. , Vianna Jeferson M. , Guimarães Miller P. , Oliveira Jorge L. D. , Hernández-Mosqueira Claudio , da Silva Sandro F. , Marchetti Paulo H. 
Published: April 2021

Abstract
The aims of this study were to compare muscle activity of the anterior deltoid, medial deltoid, and posterior deltoid in the bench press, dumbbell fly, shoulder press, and lateral raise exercises. Thirteen men experienced in strength training volunteered for the study. Muscle activation was recorded during maximum isometric voluntary contraction (MVIC) for data normalization, and during one set of 12 repetitions with the load of 60% 1RM in all exercises proposed. One-way repeated-measures ANOVA with Bonferroni’s posthoc was applied using a 5% significance level. For anterior deltoid, the shoulder press (33.3% MVIC) presented a significantly higher level of activation when compared to other exercises. Also, no significant difference was found between the bench press (21.4% MVIC), lateral raise (21.2% MVIC), and dumbbell fly (18.8% MVIC). For the medial deltoid, the lateral raise (30.3% MVIC) and shoulder press (27.9% MVIC) presented a significantly higher level of activity than the bench press (5% MVIC) and dumbbell fly (3.4% MVIC). Besides, no significant difference was found between the bench press and the dumbbell fly. For the posterior deltoid, the lateral raise (24% MVIC) presented a significantly higher level of activation when compared to other exercises. For the posterior deltoid portion, the shoulder press (11.4% MVIC) was significantly more active than the bench press (3.5% MVIC) and dumbbell fly (2.5% MVIC). Moreover, no significant difference was found between the bench press and the dumbbell fly. In conclusion, the shoulder press and lateral raise exercises showed a higher level of muscle activation in the anterior deltoid and medial deltoid when compared to the bench press and dumbbell fly exercises.
Effects of Ischemic Preconditioning as a Warm-Up on Leg Press and Bench Press Performance
Authors: Guilherme da Silva Telles Luiz , Cristiano Carelli Luiz , Dutra Bráz Igor , Junqueira Christian , Rios Monteiro Estêvão , Machado Reis Victor , Macedo Vianna Jeferson , da Silva Novaes Jefferson 
Published: April 2021

Abstract
Ischemic preconditioning (IPC) has been used to increase performance in sports. The aim of this study was to compare the acute effects of IPC with different warm-up methods on the number of repetitions and total volume in resistance exercise (RE). Sixteen healthy men recreationally trained in RE participated in this study. After the anthropometric evaluation and familiarization, a one-repetition maximum (1RM) test and retest were performed in the bench press (BP) and in the leg press 45° (LP) exercise. After these tests, participants were randomly assigned to one of the five protocols: a) IPC; b) SHAM; c) a specific warm-up (SW); d) aerobic exercise (AE), and e) active stretching (AS) prior to performing 3 sets at 80% 1RM until concentric failure. The number of repetitions was higher following IPC compared to the SW following three sets both for the BP and LP. Similarly, the number of repetitions for IPC was higher in comparison to SHAM following three sets for the LP. The number of repetitions was higher following IPC compared to AE following 1st and 2nd sets for the LP and following the 2nd set for the BP. Finally, the number of repetitions was higher following IPC compared to AS following 1st and 2nd sets for the LP. The total volume was higher following IPC compared to SHAM, SW, AE, and AS for both the BP and LP. The IPC protocol increased the number of maximum repetitions and the total volume when compared to the other tested methods, thus indicating a better utilization during the pre-work warm-up. These results indicate positive associative responses to IPC with performance maintenance, which is of importance for both athletes and coaches.
Once Upon a Time in Cyberspace: A Grim Reality about the Dangers of Cyberwarfare
Authors: Fernicola Gia 
Published: April 2021

Summary
This Article addresses the issue of translating current international law norms and principles onto the borderless realm—cyberspace. This Article provides an overview of the United States’ and Russia’s approach to defend against a cyberattack. This Article concludes with an original, new test that resolves the discrepancies between all existing approaches to determine whether or not a cyber act is in fact an armed attack.
The Uncertain Place of the Child’s Best Interests in ECtHR’s Immigration Case Law
Authors: Edlund Jennie , Stehlík Václav 
Published: April 2021

Summary
It has been highlighted that in the area of immigration law the protection offered by the European Convention of Human Rights (ECHR) to children and family life is arguably at its weakest. The European Court of Human Rights (ECtHR) immigration case law on Article 8 ECHR has shown an uneven and uncertain application of the child’s best interests. Little significance is attached to the child’s respect for family life when determining whether the immigration measure is compatible with the ECHR. This paper will explore how the Court is identifying the best interests of the child and analyse what weight the Court apportions to the best interests of the child when balancing the state’s and the applicant’s interests. It will also examine whether the Court priori-tize migration control over the child’s best interests in cases where both family matters and immigration matters are involved.
Toxic and Adverse Effects of Chemotherapy with 5-Fluoropyrimidine Drugs. Could Dihydropyrimidine Dehydrogenase Enzyme Screening Serve as a Prerequisite to Successful Chemotherapy?
Authors: Minchev Velko T. 
Published: April 2021

Summary
The article presents a detailed survey of recent publications in the literature concerning clinical expertise, existing guidelines, and differing opinions on Fluoropyrimidine chemotherapy-related toxicity and the implication of Dihydropyrimidine dehydrogenase (DPD) screening aiming to prevent severe 5-Fluorouracil-induced adverse drug reactions. The first section provides information on the mechanism of action, clinical application, pharmacokinetics and pharmacodynamics, and toxicity and adverse reactions of 5-Fluorouracil, Capecitabine, Floxuridine, and Flucytosine.
The second section summarizes DPD phenol- and genotype data and provides reasons for determining a DPD life-threatening complete or partial enzyme deficiency. The pros and cons of the methodological approaches for DPD screening are analysed, and recommendations are made to introduce them into clinical practice.
The third section includes a brief economic analysis of expenses for DPD screening of patients scheduled for 5-Fluorouracil chemotherapy. The costs are compared to those related to the treatment of patients suffering from 5-Fluorouracil-induced toxicity and unwanted adverse effects.
Effects of Extracorporeal Membrane Oxygenation Initiation on Oxygenation and Pulmonary Opacities
Authors: Batra Kiran , Mohanka Manish , Bollineni Srinivas , Kaza Vaidehi , Rajiah Prabhakar , Xi Yin , Hackmann Amy , Wait Michael , Torres Fernando , Banga Amit 
Published: April 2021

Abstract

Introduction
There is limited data on the impact of extracorporeal membrane oxygenation (ECMO) on pulmonary physiology and imaging in adult patients. The current study sought to evaluate the serial changes in oxygenation and pulmonary opacities after ECMO initiation.

Methods
Records of patients started on veno-venous, or veno-arterial ECMO were reviewed (n=33; mean (SD): age 50(16) years; Male: Female 20:13). Clinical and laboratory variables before and after ECMO, including daily PaO2 to FiO2 ratio (PFR), were recorded. Daily chest radiographs (CXR) were prospectively appraised in a blinded fashion and scored for the extent and severity of opacities using an objective scoring system.

Results
ECMO was associated with impaired oxygenation as reflected by the drop in median PFR from 101 (interquartile range, IQR: 63-151) at the initiation of ECMO to a post-ECMO trough of 74 (IQR: 56-98) on post-ECMO day 5. However, the difference was not statistically significant. The appraisal of daily CXR revealed progressively worsening opacities, as reflected by a significant increase in the opacity score (Wilk’s Lambda statistic 7.59, p=0.001). During the post-ECMO period, a >10% increase in the opacity score was recorded in 93.9% of patients. There was a negative association between PFR and opacity scores, with an average one-unit decrease in the PFR corresponding to a +0.010 increase in the opacity score (95% confidence interval: 0.002 to 0.019, p-value=0.0162). The median opacity score on each day after ECMO initiation remained significantly higher than the pre-ECMO score. The most significant increase in the opacity score (9, IQR: -8 to 16) was noted on radiographs between pre-ECMO and forty-eight hours post-ECMO. The severity of deteriorating oxygenation or pulmonary opacities was not associated with hospital survival.

Conclusions
The use of ECMO is associated with an increase in bilateral opacities and a deterioration in oxygenation that starts early and peaks around 48 hours after ECMO initiation.
The Correspondence between Fluid Balance and Body Weight Change Measurements in Critically Ill Adult Patients
Authors: Antonio Ana Carolina Peçanha , Fernandes Vivian Rodrigues , Azzolin Karina de Oliveira 
Published: April 2021

Abstract

Introduction
Positive fluid status has been associated with a worse prognosis in intensive care unit (ICU) patients. Given the potential for errors in the calculation of fluid balance totals and the problem of accounting for indiscernible fluid losses, measurement of body weight change is an alternative non-invasive method commonly used for estimating body fluid status. The objective of the study is to compare the measurements of fluid balance and body weight changes over time and to assess their association with ICU mortality.

Methods
This prospective observational study was conducted in the 34-bed multidisciplinary ICU of a tertiary teaching hospital in southern Brazil. Adult patients were eligible if their expected length of stay was more than 48 hours, and if they were not receiving an oral diet. Clinical demographic data, daily and cumulative fluid balance with and without indiscernible water loss, and daily and total body weight changes were recorded. Agreement between daily fluid balance and body weight change, and between cumulative fluid balance and total body weight change were calculated.

Results
Cumulative fluid balance and total body weight change differed significantly among survivors and non survivors respectively, +2.53L versus +5.6L (p= 0.012) and -3.05kg vs -1.1kg (p= 0.008). The average daily difference between measured fluid balance and body weight was +0.864 L/kg with a wide interval: -3.156 to +4.885 L/kg, which remained so even after adjustment for indiscernible losses (mean bias: +0.288; limits of agreement between -3.876 and +4.452 L/kg). Areas under ROC curve for cumulative fluid balance, cumulative fluid balance with indiscernible losses and total body weight change were, respectively, 0.65, 0.56 and 0.65 (p= 0.14).

Conclusion
The results indicated the absence of correspondence between fluid balance and body weight change, with a more significant discrepancy between cumulative fluid balance and total body weight change. Both fluid balance and body weight changes were significantly different among survivors and non-survivors, but neither measurement discriminated ICU mortality.
A Particular Infantile Scimitar Syndrome Variant with Anomalous Systemic Arterial Supply-Inferior Vena Cava Fistula
Authors: Șuteu Carmen Corina , Blesneac Cristina , Pop Marian , Făgărășan Amalia , Gozar Liliana , Togănel Rodica 
Published: April 2021

Abstract
Scimitar syndrome is a rare congenital cardiovascular malformation that includes a partially anomalous drainage of the pulmonary veins in the inferior vena cava, right pulmonary hypoplasia, and systemic-pulmonary collaterals originating from various segments of the aorta. We present a case of Scimitar syndrome with associated intracardiac lesions and a large arterial conduct supplying the right lung, originating from the abdominal aorta and draining in the inferior vena cava.
Fair MAC protocol for IEEE 802.11 wireless LANs with hidden node problem
Authors: Choi Woo-Yong 
Published: April 2021

Abstract
In IEEE 80211 wireless LANs, hidden nodes can disrupt the backoff algorithm of other nodes that are located outside the physical carrier sensing range of hidden nodes. The fairness problem between the nodes that are vulnerable and not vulnerable to the hidden node problem is dealt with in this paper. We propose an efficient fair MAC protocol to resolve the fairness problem.
Comparison of the power balance in a Totem-Pole Bridgeless PFC topology with several inrush current limiting strategies
Authors: Jacques Sébastien , Reymond Cédric , Le Bunetel Jean-Charles , Benabdelaziz Ghafour 
Published: April 2021

Abstract
Limiting inrush currents is usually necessary when AC-DC conversion is used to supply DC loads such as battery chargers in particular, it must comply with IEC 61000-3-3. This document discusses the suitability of an active inrush current limiter that can be used to replace traditional thermistors and NTC relays. This strategy is based on the control of the phase shift of thyristor type power components. It has been implemented in a totem-pole bridgeless power factor corrector (PFC). Experimental results show that this solution differs from traditional solutions to ensure high energy efficiency (higher than 95%) while limiting inrush currents.
Multiscale filter-based hyperspectral image classification with PCA and SVM
Authors: Chen Guang Yi 
Published: April 2021

Abstract
Hyperspectral imagery can offer images with high spectral resolution and provide a unique ability to distinguish the subtle spectral signatures of different land covers. In this paper, we develop a new algorithm for hyperspectral image classification by using principal component analysis (PCA) and support vector machines (SVM). We use PCA to reduce the dimensionality of an HSI data cube, and then perform spatial convolution with three different filters on the PCA output cube. We feed all three convolved output cubes to SVM to classify every pixel. Finally, we perform fusion on the three output maps to determine the final classification map. We conduct experiments on three widely used hyperspectral image data cubes (ie indian pines, pavia university, and salinas). Our method can improve the classification accuracy significantly when compared to several existing methods. Our novel method is relatively fast in term of CPU computational time as well.
Czech mothers read books to their young children: association with mothers’ education
Authors: Gavora Peter 
Published: April 2021

Abstract
The study concentrated on mothers’ reading to their preschool children. Three broad questions were posed about how the mother’s educational level is associated with: (1) the mother’s reasons to read to the child, (2) frequency and duration of this reading, (3) mother-child literacy interaction with the child. The sample of low education mothers (n=55) and high education mothers (n=213) was recruited to fill in a questionnaire of 46 items. Higher education mothers outperformed low education mothers in these variables: reading to the child in order to enhance cognitive development, appreciate the time they are with the child in reading sessions, reading to child frequency, and the number of books the child possesses. On the other hand, low education mothers more frequently than high education mothers ask children about book characters and explain reasons for reading.
Teachers’ persona reflects in students’ personality: A case study of primary school level in the Sahiwal District, Pakistan
Authors: Daha Zeenat Abdul-Haq , Imran Muhammad 
Published: April 2021

Abstract
This study highlights the imperative fact that students are the personification of a teacher’s persona. The professional persona of the teachers is the reflection of personal and emotional traits that helps their students in the development of a nation. This is a quantitative study of 40 teachers and 153 students from Sahiwal district, Pakistan based on Erikson’s theory of psychosocial development. For questionnaires, the study gyrates around the conceptual framework of teachers’ personal traits independent variables: empathy, resourcefulness, wittiness, acknowledgment, determination, and creativeness are aimed to analyze their reflection in students’ performance as a dependent variable. For data collection, the purposive sampling technique is used and SPSS software for calculations. This study traces that it is a need the hour to improve the society through training of a teacher to develop a paradigm of ‘Teacher’s persona’ that ultimately, influences the students en masse.
Historical Bratislava in literary fiction and film adaptation
Authors: Tekeliová Dominika Hlavinová 
Published: April 2021

Abstract
The aim of the paper is to characterize the city of Bratislava after the First World War as a literary space in the short story The Worst Crime in Wilson City (Najhorší zločin vo Wilsonove) and its film adaptation Wilson City (Wilsonov). For millions of Czechs and Slovaks, the US President W. Wilson was a legendary figure. The multi-ethnic city wanted to gratify him and suggested to name itself after him. This short episode of our history was found interesting for a Slovak writer Michal Hvorecký, who set a mysterious (horror) short story in Wilson City (Bratislava). The topos of the city became the basic organizational, or, structural element on which the story is built. In the film adaptation of the Czech director Tomáš Mašín there was a generic shift and the film became a detective comedy, or parody of historical events that happened (or could have happened). The paper focuses on the motif of the city and compares this urban space in the literary and film form. It tries to answer the question whether the city – space is only a backdrop of the story or it becomes its (role)player.
Long-term outdoor exposure of artificial copper patina based on brochantite
Authors: Bureš R. , Rak P. , Stoulil J. 
Published: April 2021

Abstract
A typical green layer of patina starts to cover copper in atmosphere condition, which is aesthetically acceptable and also provides protective properties. This work investigates stability of the artificial patina layer based on sulphates prepared from a gaseous phase during two-year exposure in atmosphere condition. XRD and SEM were employed to verify the composition and morphology of artificial patina. Colour and patina coverage were compared before and after exposure also. According to results after 1 and 2 years of exposure, it is possible to see changing of hydroxyl sulphates to more stable brochantite and filling pores in the patina layer. There is almost no colour change, however lower patina coverage is slightly evident due to precipitation and abrasive effect.