scholarly journals The effect of shortening and lengthening round periods exercises in the development of special endurance and some pulse indicators in elite boxers

2021 ◽  
Vol 20 (4) ◽  
pp. 0042
Author(s):  
Dr. Abduljaleel Jabbar Nasir
Keyword(s):  
Time Period ◽  
The Times ◽  
Positive Effect

The researcher noticed some weakness in the special endurance of boxers, at the end of rounds, especially at the end of the last round, the researcher suggested special exercises using the method of shortening or lengthening the training rounds time, to develop special endurance and some pulse indicators, the researcher chose 14 boxers that were divided equally into two groups, control and experimental, the researcher used the times: (30 sec.), (60 sec.) and (90 sec.), with rest times between (15 sec. and  60 sec) and (4 minutes), (5 minutes), (6 Minutes) with rest times between (30 sec. to 90 sec.), The repetitions for each round were downwards according to the time period of the round, the researcher concluded that training using shortening and lengthening exercises time has a positive effect in developing the endurance level and some pulse indicators for boxers from the research sample.

scholarly journals Marriage stability in a pastoralist society

2019 ◽  
Vol 30 (6) ◽  
pp. 1567-1574
Author(s):  
Juan Du ◽  
Ruth Mace
Keyword(s):  
Social Institutions ◽  
Ecological Perspective ◽  
Marriage Duration ◽  
Time Period ◽  
Marriage Stability ◽  
The Family ◽  
Trial Marriage ◽  
Socioeconomic Data ◽  
Positive Effect

Abstract We examined how individual investment was associated with the duration of marriage partnerships in a pastoralist society of Amdo Tibetans in China. We collected demographic and socioeconomic data from 420 women and 369 men over five villages to assess which factors predicted partnership length. We found that the payment of dowry and bridewealth from both sides of the family predicted marriage stability. The production of offspring, regardless of their survivorship, also had a positive effect on marriage duration, as did trial marriage, a time period before formal marriage. Finally, we found that if both bride and groom invest resources initially into a partnership—whether wealth or labor—their subsequent partnership is stronger than couples who do not make such investments. This paper adds to our understanding of complex social institutions like marriage from a behavioral ecological perspective.

scholarly journals EFECT OF FOREIGN EXCHANGE RATE FLUCTUATIONS ON NIGERIAN ECONOMY

10.26458/1814 ◽  
2018 ◽  
Vol 18 (1) ◽  
pp. 105-122
Author(s):  
Lawrence Olisaemeka UFOEZE ◽  
Camilus OKUMA, N. ◽  
Clem NWAKOBY ◽  
Udoka Bernard Alajekwu
Keyword(s):  
Economic Growth ◽  
Exchange Rate ◽  
Money Supply ◽  
Significant Positive Effect ◽  
Exchange Rate Fluctuations ◽  
Fixed Exchange Rate ◽  
Oil Revenue ◽  
Time Period ◽  
Negative Effect ◽  
Positive Effect

This study investigated the effect of exchange rate fluctuations on Nigerian economy. The fixed and floating exchange eras were compared to know the exchange rate system in which the economy has fairly better. The time period covered was 1970 to 2012. The study employed the ordinary least square (OLS) multiple regression technique for the analysis. The coefficient of determination (R2), F-test, t-test, beta and Durbin-Watson were used in the interpretation of the results. The resulted revealed that about 85% of the changes in macroeconomic indicators are explained in the fixed exchange era. In the floating exchange era, 99% was explained while the whole periods has 73% explanatory power, hence the floating exchange era (1986 to date) is more effective in explaining economic trend in Nigeria. Also, exchange rate has significant positive effect on GDP during the fixed exchange rate era and negative effect the eras floating and all-time; inflation has insignificant negative effect on GDP during the fixed exchange era; significant effect in floating era and significant negative effect in the all-time period; money supply has insignificant negative effect GDP in fixed exchange era; and significant positive effect during the floating and all-time period; and oil revenue has significant positive effect on the GDP in all the exchange rate regimes (floating, fixed and all-time) in Nigeria.  The study thus conclude that exchange rate movement is a good indicator for monitoring Nigerian economic growth. So far exchange rate has always been a key economic indicator for Nigeria. The floating exchange period has outperformed the fixed exchange rate in terms of contribution inflation, money supply and oil revenue to economic growth. This indicate that the floating exchange rate has been a better economic regime for sustainable economic growth in Nigeria. From the findings, it is evident that oil revenue has positive effect in Nigeria and has remained the mainstay of the economy. It is thus recommended among other things that a positive exchange rate stock should be monitored regularly, so as not to allow those that find exchange rate as an avenue of investment like banks and public carry out their business, which is more devastating to the economy. 

An Analysis of the Effect of selected Factors on microsurgical Performance

2021 ◽  
Author(s):  
Andrzej Zyluk ◽  
Konrad Czernikiewicz ◽  
Joanna Antoniak ◽  
Urszula Abramczyk
Keyword(s):  
Physical Exercise ◽  
Medical Studies ◽  
Latex Glove ◽  
Physical Exercises ◽  
Surgical Expertise ◽  
Negative Effect ◽  
The Times ◽  
The Impact ◽  
Positive Effect

Abstract Background Microsurgery is a specific surgical expertise that involves operating on very small structures, and requires the assistance of a magnifying device: a microscope or loupes. Several factors have been identified that could affect the quality of microsurgical performance in training or surgical procedures. Objective The objective of this study was to assess the impact of the selected factors – caffeine, alcohol and physical exercise – on a microsurgical task prior its performance. Methods Ten students from the 5th and 6th years of medical studies who had completed the advanced microsurgical course performed a “6-stitches test” on a latex glove spanned over a cup prior to and after consumption of caffeine, alcohol and performing physical exercises. The times taken to complete the task at baseline and post-exposure were recorded. Results The results of the study show a statistically significant positive effect of caffeine and a statistically significant negative effect of physical exercise on microsurgical performance when performed shortly before the task. Small dose of alcohol taken before the task showed had little effect on performance.

scholarly journals Cognitive and Applied Linguistics Aspects of Using Social Media: The Impact of the Use of Facebook on Developing Writing Skills in Learning English as a Foreign Language

2019 ◽  
Vol 10 (1) ◽  
pp. 110-118 ◽  
Author(s):  
Blanka Klimova ◽  
Marcel Pikhart
Keyword(s):  
Foreign Language ◽  
Web Of Science ◽  
Language Skills ◽  
Writing Skills ◽  
Review Article ◽  
Language Competence ◽  
Time Period ◽  
The Impact ◽  
Positive Effect ◽  
Learning English

Facebook is undoubtedly the most popular social network site nowadays with over two billion users. Therefore, there has been research exploring its potential as a learning environment for various fields of education, including learning English as a foreign language (EFL). As the findings of research studies indicate, Facebook is especially used in developing productive language skills, such as writing, which is considered to be the least popular and the most difficult skill to master. Thus, the purpose of this article is to explore the impact of Facebook on developing writing skills in learning English as a foreign language. The methodology is based on the search for available studies on the research topic, i.e., the impact of Facebook on developing writing skills in EFL, in the world’s databases: Web of Science and Scopus. The search was not limited by any time period. The results of this review article reveal that using Facebook has a positive effect on developing writing skills in EFL classes, especially in shaping and organizing ideas, enhancing motivation, developing and supporting collaboration among peers, improving vocabulary, and reducing students’ shyness. However, more experimental research should be done in this area to reveal other aspects of the writing process, such as communicative language competence, which can be improved by using Facebook, as well as address researchers from continents other than Asia.

scholarly journals BCI-Based Rehabilitation on the Stroke in Sequela Stage

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Yangyang Miao ◽  
Shugeng Chen ◽  
Xinru Zhang ◽  
Jing Jin ◽  
Ren Xu ◽  
...  
Keyword(s):  
Motor Function ◽  
The Body ◽  
Control Group ◽  
Stroke Patients ◽  
Time Period ◽  
Average Improvement ◽  
Study Results ◽  
Electroencephalogram Eeg ◽  
Positive Effect

Background. Stroke is the leading cause of serious and long-term disability worldwide. Survivors may recover some motor functions after rehabilitation therapy. However, many stroke patients missed the best time period for recovery and entered into the sequela stage of chronic stroke. Method. Studies have shown that motor imagery- (MI-) based brain-computer interface (BCI) has a positive effect on poststroke rehabilitation. This study used both virtual limbs and functional electrical stimulation (FES) as feedback to provide patients with a closed-loop sensorimotor integration for motor rehabilitation. An MI-based BCI system acquired, analyzed, and classified motor attempts from electroencephalogram (EEG) signals. The FES system would be activated if the BCI detected that the user was imagining wrist dorsiflexion on the instructed side of the body. Sixteen stroke patients in the sequela stage were randomly assigned to a BCI group and a control group. All of them participated in rehabilitation training for four weeks and were assessed by the Fugl-Meyer Assessment (FMA) of motor function. Results. The average improvement score of the BCI group was 3.5, which was higher than that of the control group (0.9). The active EEG patterns of the four patients in the BCI group whose FMA scores increased gradually became centralized and shifted to sensorimotor areas and premotor areas throughout the study. Conclusions. Study results showed evidence that patients in the BCI group achieved larger functional improvements than those in the control group and that the BCI-FES system is effective in restoring motor function to upper extremities in stroke patients. This study provides a more autonomous approach than traditional treatments used in stroke rehabilitation.

scholarly journals Growth and Income Inequality: A Comparative Analysis

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Ayla Ogus Binatli
Keyword(s):  
Comparative Analysis ◽  
Income Inequality ◽  
Time Period ◽  
Negative Effect ◽  
Time Periods ◽  
Growth Changes ◽  
Changes Over Time ◽  
The Relationship ◽  
Positive Effect ◽  
Over Time

This paper investigates whether the relationship between income inequality and growth changes over time. Two time periods, covering 1970–1985 and 1985–1999, are analyzed and compared. A statistically significant relationship between inequality and growth in either time period fails to emerge. However, there are indications that effect of inequality on growth may be different in the nineties when compared to the seventies. In the literature, a consistent negative effect of inequality on growth is documented although the significance of the effect is open to debate. This paper also finds a negative effect of income inequality on growth in the seventies but, although statistically insignificant, a consistently positive effect in the nineties.

Adsorption of Avermectin on Porous Hollow Silica Nanoparticles by Supercritical Technology

2007 ◽  
Vol 7 (2) ◽  
pp. 535-541 ◽  
Author(s):  
Zhu-Zhu Li ◽  
Jian-Feng Chen ◽  
Ying Li ◽  
Li-Xiong Wen
Keyword(s):  
Carbon Dioxide ◽  
Silica Nanoparticles ◽  
The Other ◽  
Hollow Silica ◽  
Adsorption Time ◽  
Time Period ◽  
Adsorption Temperature ◽  
Optimal Value ◽  
Hollow Silica Nanoparticles ◽  
Positive Effect

Porous hollow silica nanoparticles with O.D. of ∼100 nm and a wall thickness of ∼10 nm were prepared by using inorganic CaCO3 templates. The produced PHSN were employed as a novel carrier to study the adsorption of avermectin in supercritical carbon dioxide by applying different adsorption pressure, adsorption temperature, adsorption time and volume of cosolvent. The results indicated that while increasing adsorption pressure and time always showed a positive effect on the avermectin adsorption until adsorption saturation is reached, both the adsorption temperature and volume of cosolvent require an optimal value for achieving the maximum adsorption. It was found that the optimal adsorption could be obtained at an adsorption pressure of 15 MPa and an adsorption temperature of 313 K for 90 minutes with 5 ml cosolvent. In addition, the desorption behavior of avermectin from the avermectin-loaded PHSN samples showed a sustained style: ∼60% of avermectin was released in the first 20 minutes, while the other 40% followed a typical sustained desorption pattern and was dissolved out slowly for a time period of 3000 minutes, which is different from the quick and complete desorption from solid SiO2 carriers.

scholarly journals Research on the Construction of Graduate Education Management and Cultivation Mechanism in Universities

2020 ◽  
Vol 9 (5) ◽  
pp. 240
Author(s):  
Rui Chen
Keyword(s):  
Graduate Education ◽  
Rapid Development ◽  
Education Management ◽  
History Of Development ◽  
History Of ◽  
The Times ◽  
High Degree ◽  
Positive Effect ◽  
And Training

Education has a long history of development. With the rapid development of the economy and the progress of society, the country's demand for talents and the quality of talent training is constantly increasing. The current high degree of education has become the choice of young intellectuals, so graduate education has become the focus of attention. At this stage, the scale of graduate education continues to expand, and more attention should be paid to the strengthening of graduate education in management and training mechanisms in order to facilitate the graduate education, to provide a broad space for the development and adapting to the times. Based on the current situation of graduate education management and training mechanisms in colleges and universities, this article analyzes and researches, hoping to bring a positive effect to graduate education in universities.

scholarly journals Optical and Photoacoustic Properties of Colloidal Silver Nanoparticles Solutions

2018 ◽  
Vol 7 (4) ◽  
pp. 1 ◽  
Author(s):  
F. Aldosari ◽  
A. M. Azzeer ◽  
A. M. Hassib
Keyword(s):  
Silver Nanoparticles ◽  
Temperature Stability ◽  
Colloidal Silver ◽  
Colloidal Solutions ◽  
X Ray Diffraction ◽  
Duration Time ◽  
Colloidal Silver Nanoparticles ◽  
Transmission Electron ◽  
Time Period ◽  
The Times

The study has aimed to investigate optical and photoacoustic properties of some colloidal silver nanoparticles at different concentration over the time. The phase purity with crystal structure of silver nanoparticles were studied using X-ray diffraction (XRD) and was confirmed by Transmission Electron Microscopy (TEM). Optical property was changed during the variable concentration of nanoparticles and duration time of sample. The absorbance of silver colloidal solutions is increased, when concentration increases but decreased with respective to the longer period of sample. Absorption peaks and stability of particles in solutions is influenced by the duration time of solution and its concentration. The low concentration-based solutions fall in the absorbance over the times. The observed PA signal is subjected by the factor of parameters; such as, pump wavelengths, energy, repetition rate, concentrations, and temperature. Stability of fluorescence and absorption peaks are influenced by the concentration of particles and time period of colloidal solution. Effects on PA signal with fluorescent and absorption peaks upon the concentration was also significant.

Modulation of LH-secretion in ovariectomized ewes by constant infusions of oestradiol and 4-hydroxyoestradiol: effects of varying infusion times and of high oestrogen doses

1986 ◽  
Vol 113 (2) ◽  
pp. 219-225 ◽  
Author(s):  
G. Emons ◽  
H. Schuppe ◽  
M. Peter ◽  
C. Brack ◽  
P. Ball
Keyword(s):  
Plasma Levels ◽  
Critical Time ◽  
List Type ◽  
Response Relationship ◽  
Dose Response Relationship ◽  
Oestrogen Treatment ◽  
Time Period ◽  
Lh Secretion ◽  
Positive Effect ◽  
Intracellular Action

Abstract. Ovariectomized ewes were infused for different times (2–24 h) during the breeding season (September to Februray) with oestradiol (E2, 2 μg/h) or the catecholoestrogen 4-hydroxyoestradiol (4-OHE2, 10 μg/h). At these infusion rates comparable plasma levels of E2 and 4-OHE2 were obtained when steady state was reached after 3 h (E2: 20 ± 4 pg/ml; 4-OHE2: 22 ± 3 pg/ml). When E2 was infused for at least 6 h, all animals had significant LH-surges, starting 14-16 h after the beginning of oestrogen treatment, even when E2 was infused for up to 24 h. 4-OHE2, however, had only to be infused for 4 h to induce significant LH-surges in all animals tested. When E2 was infused for 12 h at a rate of 100 μg/h, the LH-surges in these ewes were significantly lower than the LH-surges in the same animals treated for 12 h with E2at a rate of 2 μg/h. These data indicate: Once E2 has been administered at a specific infusion rate for a critical time period of 6 h, LH-surges occur, no matter whether the E2-infusion is continued or stopped. For the catecholoestrogen 4-OHE2 this critical time period amounts only to 4 h, if comparable plasma levels of either oestrogen are achieved. This might hint at a prolonged intracellular action of 4-OHE2 as compared to E2. At extremely high infusion rates of E2 (100 μg/h for 12 h) the positive oestrogen effect is significantly impaired, a finding supporting the concept of a bell-shaped dose-response relationship between oestrogens and their positive effect on LH-secretion.

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