scholarly journals How Glaciers Function and How They Create Landforms: Testing the Effectiveness of Fieldwork on Students’ Mental Models—A Case Study from the Sanabria Lake (NW Spain)

Geosciences ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 238 ◽  
Author(s):  
Diego Corrochano ◽  
Alejandro Gómez-Gonçalves
Keyword(s):  
Mental Models ◽  
Mental Model ◽  
Positive Impact ◽  
Model Development ◽  
Short Term ◽  
Model Categories ◽  
Instruction Group ◽  
Before And After ◽  
The Impact

This paper analyzes the impact of fieldwork on the development of students’ mental models concerning glaciers and their effects on the landscape. Data were collected by means of an open-ended questionnaire that was administered to 279 pre-service teachers before and after an educational field trip, which analyzed its impact on short-term and long-term outcomes. In general, students’ mental models about how glaciers function and how they create landforms are relatively simplistic and incomplete. Students are unaware of the major erosional properties associated with glaciers and many of them do not specify that glaciers are bodies of ice that have a tendency to move down slope. The analysis of the data yielded four mental model categories. Fieldwork influenced the short-term effects on mental model development even though its positive impact decreases over time. Mental models including scientific views were only found in the post-instruction group. On the other hand, the pre-instruction group was strongly influenced by a catastrophic event that occurred in the region in 1959 (the Ribadelago flooding), which interferes with students’ mental reasoning on the formation of landscape features. This way of thinking is reinforced and/or mixed with a religious myth (Villaverde de Lucerna legend), which also invokes a catastrophic origin of the lake. In this case, this includes mystic flooding.

scholarly journals Paleolithic Diet—Effect on the Health Status and Performance of Athletes?

Nutrients ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 1019
Author(s):  
Barbara Frączek ◽  
Aleksandra Pięta ◽  
Adrian Burda ◽  
Paulina Mazur-Kurach ◽  
Florentyna Tyrała
Keyword(s):  
Blood Pressure ◽  
Body Mass ◽  
Positive Impact ◽  
Model Assessment ◽  
Paleolithic Diet ◽  
Short Term ◽  
Positive Effects ◽  
Short And Long Term ◽  
The Impact

The aim of this meta-analysis was to review the impact of a Paleolithic diet (PD) on selected health indicators (body composition, lipid profile, blood pressure, and carbohydrate metabolism) in the short and long term of nutrition intervention in healthy and unhealthy adults. A systematic review of randomized controlled trials of 21 full-text original human studies was conducted. Both the PD and a variety of healthy diets (control diets (CDs)) caused reduction in anthropometric parameters, both in the short and long term. For many indicators, such as weight (body mass (BM)), body mass index (BMI), and waist circumference (WC), impact was stronger and especially found in the short term. All diets caused a decrease in total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), and triglycerides (TG), albeit the impact of PD was stronger. Among long-term studies, only PD cased a decline in TC and LDL-C. Impact on blood pressure was observed mainly in the short term. PD caused a decrease in fasting plasma (fP) glucose, fP insulin, and homeostasis model assessment of insulin resistance (HOMA-IR) and glycated hemoglobin (HbA1c) in the short run, contrary to CD. In the long term, only PD caused a decrease in fP glucose and fP insulin. Lower positive impact of PD on performance was observed in the group without exercise. Positive effects of the PD on health and the lack of experiments among professional athletes require longer-term interventions to determine the effect of the Paleo diet on athletic performance.

Accrual management and the decision to sell or hold shares acquired from the exercise of employee stock options

2020 ◽  
pp. 0000-0000
Author(s):  
Thomas Smith ◽  
G. Ryan Huston ◽  
Richard M. Morton
Keyword(s):  
Stock Option ◽  
Employee Stock Options ◽  
Short Term ◽  
Post Exercise ◽  
Employee Stock Option ◽  
Holding Period ◽  
Before And After ◽  
Accrual Management ◽  
The Impact

This study extends the employee stock option literature by examining the impact of accrual management, before and after stock option exercise, on the timing of sales of shares acquired at exercise. We find evidence that accrual management prior to exercise is positively associated with the decision to quickly sell shares after exercise, facilitating a short-term exercise-and-sell strategy. Alternatively, we find that, among executives initially choosing to hold at exercise, tax incentives appear to drive both post-exercise accrual management and the timing of sale transactions. Specifically, our results suggest that executives use income-increasing accruals during the holding period to bolster their stock option gains sand then sell immediately after satisfying the minimum (twelve month) holding period for long-term capital gain treatment. These results provide context for prior research that found evidence of earnings management leading up to option exercise on the expectation of an immediate sale.

scholarly journals Coach Mid-Season Replacement and Team Performance in Professional Soccer

2011 ◽  
Vol 28 (1) ◽  
pp. 115-122 ◽  
Author(s):  
Carlos Lago-Peñas
Keyword(s):  
Team Performance ◽  
Positive Impact ◽  
Short Term ◽  
Shock Effect ◽  
Professional Soccer ◽  
Before And After ◽  
Using Data ◽  
The Relationship ◽  
The Empirical Analysis

Coach Mid-Season Replacement and Team Performance in Professional SoccerThe coaching carousel or turnover is an extreme but frequently occurring phenomenon in soccer. Among the reasons for firing a coach, the most common is the existence of a shock-effect: a new coach would be able to motivate the players better and therefore to improve results. Using data from the Spanish Soccer League during the seasons from 1997-1998 to 2006-2007, this paper investigates the relationship between team performance and coach change over time. The empirical analysis shows that the shock effect of a turnover has a positive impact on team performance in the short term. Results reveal no impact of coach turnover in the long term. The favourable short-term impact on team performance of a coach turnover is followed by continued gradual worsening of results. The turnover effect is non-existent when the comparison between the new coach and the old coach is done over 10, 15 or 20 matches before and after termination.

scholarly journals Control Study of Short-Term Aftereffect in Diving Exposure Related Pulmonary Ventilation Function

2021 ◽  
Vol 6 (4) ◽  
Keyword(s):  
Pulmonary Ventilation ◽  
Flow Index ◽  
Control Group ◽  
Short Term ◽  
Before And After ◽  
Expiratory Flow ◽  
Hyperbaric Exposure ◽  
The Impact ◽  
Pulmonary Ventilation Function

Objective: Ventilation attenuation often happened in professional divers due to long-term cumulative effects in diving exercises. By case-control experiments, we observed the immediate effects of pulmonary ventilation before and after the exposure of 12m-depth underwater for 20 min to discuss the relationships between the short-term and long-time effects caused by diving environment. Methods: Participants were randomly assigned into the Experimental Group (EG) who stayed for 20 min under 12-m water environment or the Control Group (CG) who stayed in hyperbaric chamber under the pressure of 2.2ATA. Pulmonary ventilation function parameters including VC, FVC, MVV and MV were detected respectively before and after hyperbaric exposure by the Spirometer. Immediate effects of pulmonary ventilation before and after diving were compared by paired t test to reveal the different influence caused by environmental pressure. Results: The value of VC appears to rise while the MV, MVV were detected decreased after the exposure of 2.2ATA of environment pressure for 20min in the two groups. VC increased more significantly in the CG (t=-1.26, p=0.23) after hyperbaric exposure, that leads to the FEV1.0%t (=FEV1.0/VC %) increase in EG (t=-0.73, p=0.48) while decrease in CG (t=0.42, p=0.17). The same trend in VC, MV and MVV after high pressure exposure in the two groups mainly due to the effect of common factors –the pressure. In addition to the impact of the pressure itself, EG members also face diving related immersion effect, influence of diving equipment load and water under low temperature. The FVC is detected decreased in EG (t=1.21, P =0.25) while it increased in CG (t=-0.42, P =0.68) , but the differences are not significant and couldn’t affect the measured FEV1.0% (=FEV1.0/FVC %) values showed both increasing in EG (t=-1.48, P =0.16) and in CG (t=-0.23, P =0.82). The expiratory flow rate including PEF, FEF25-75, MEF75, MEF50 increased in EG (t are -0.72, -0.69, -0.87 and -0.36 respectively with P all greater than 0.05) while decreased in CG (t are 1.67, 0.50, 1.53 and 0.71 respectively with P all greater than 0.05). MEF25 is the expiratory flow index of not affected by respiratory muscle force and the measured values of MEF25 increased in the EG (t=-0.68, P =0.51) and in the CG (t=-0.36, P =0.72). Conclusion: Water immersion and water temperature during diving exposure could cause and accelerate hemodynamic changes in pulmonary circulation induced pulmonary interstitial edema and led to the increase of external respiratory work. Instant effects of diving exposure in the study are quite consistent with the long-term cumulative effect of professional divers in previous research, which is FVC reduced because small airway become narrower. The results illustrate even the small depth of short-range diving exercise have definite influences on pulmonary ventilation, which mainly comes from the environmental factor but not the pressure increases.

Positive Impact of Physical Exercise on Brain Activity

2021 ◽  
pp. 1-6
Author(s):  
Yunkyeong Nam
Keyword(s):  
Physical Exercise ◽  
Aerobic Exercise ◽  
Positive Impact ◽  
Brain Activity ◽  
Daily Routine ◽  
Long Term Effects ◽  
Short Term ◽  
Before And After ◽  
The Individual

A case study was conducted in order to track the human brain adapts to changing demands by physical exercise. Reaction time and amplitude discrimination capacity of the individual were measured with the Brain Gauge to monitor brain activity before and after aerobic exercise. The objective of the study was to determine if there were short-term and/or long-term effects of aerobic exercise.  The data suggests that there are short-term effects and some improvements in performance on the tasks when comparing metrics obtained after exercise to before exercise.  For this individual, aerobic exercise was a regular part of daily routine, there was no long-term effect detected over the relatively short duration of the study.

scholarly journals A Comparative Analysis of Impact of Universal Two-Child Policy on Maternity Insurance Fund in Jiangsu Province and Guangxi Zhuang AR

Healthcare ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 468
Author(s):  
Henry Asante Antwi ◽  
Lulin Zhou ◽  
Xinglong Xu ◽  
Tehzeeb Mustafa
Keyword(s):  
Positive Impact ◽  
Jiangsu Province ◽  
Insurance Fund ◽  
Additional Contribution ◽  
Contribution Rate ◽  
Short Term ◽  
Health Crisis ◽  
Child Policy ◽  
The Impact

The maternity insurance fund in some provinces in China has accumulated unprecedented deficit levels. This imminent depletion can cause a catastrophic health crisis for maternal health. This study analyzed the post-policy impact of key factors on maternity insurance income inflow and outflow in Jiangsu Province and Guangxi Zhuang Autonomous Region (AR). We applied Pasera’s ARLD model and VECM Granger Causality Test to establish long- and short-term impact of selected factors that determines the income and expenditure of the maternity insurance fund in the two regions based on data from 2011 to 2019. Our results show that the addition of new births due to the universal two-child policy has increased the per capita utilization of the maternity insurance fund in both areas. We further observed that the impact of the maternity insurance contribution rate to the maternity insurance fund decays with time giving a long-run limited impact in both provinces. Thus the positive impact is stronger in the short term, but in the long term, its influence or contribution to stability of the funds reduces. The positive impact of interest from investment in the maternity insurance fund is however insignificant in both provinces, giving a major cause for concern on its role in maternity insurance fund income generation. In the short term, the contribution rate of the maternity insurance fund must be adjusted upward or the payment base expanded to receive additional contribution from all employees to avoid complete depletion of the fund. In the long term, we recommend the need to replenish the maternity insurance funds through proper investment options for the funds. We further recommend the need to look for other sources of funding social interventions based on existing practices in other countries.

scholarly journals Control study of short-term after effect in diving exposure related pulmonary ventilation function

2017 ◽  
Author(s):  
Hua Cheng
Keyword(s):  
Pulmonary Ventilation ◽  
Flow Index ◽  
Control Group ◽  
Short Term ◽  
Before And After ◽  
Expiratory Flow ◽  
Hyperbaric Exposure ◽  
The Impact ◽  
Pulmonary Ventilation Function

Objective: Ventilation attenuation often happened in professional divers due to long-term cumulative effects in diving exercises. By case-control experiments, we observed the immediate effects of pulmonary ventilation before and after the exposure of 12m-depth underwater for 20 min to discuss the relationships between the short-term and long-time effects caused by diving environment. Methods: Participants were randomly assigned into the Experimental Group (EG) who stayed for 20 min under 12-m water environment or the Control Group (CG) who stayed in hyperbaric chamber under the pressure of 2.2ATA. Pulmonary ventilation function parameters including VC, FVC, MVV and MV were detected respectively before and after hyperbaric exposure by the Spirometer. Immediate effects of pulmonary ventilation before and after diving were compared by paired t test to reveal the different influence caused by environmental pressure. Results: The value of VC appears to rise while the MV, MVV were detected decreased after the exposure of 2.2ATA of environment pressure for 20min in the two groups. VC increased more significantly in the CG (t=-1.26, p=0.23) after hyperbaric exposure, that leads to the FEV1.0%t (=FEV1.0/VC %) increase in EG (t=-0.73, p=0.48) while decrease in CG (t=0.42, p=0.17). The same trend in VC, MV and MVV after high pressure exposure in the two groups mainly due to the effect of common factors –the pressure. In addition to the impact of the pressure itself, EG members also face diving related immersion effect, influence of diving equipment load and water under low temperature. The FVC is detected decreased in EG (t=1.21, P =0.25) while it increased in CG (t=-0.42, P =0.68)，but the differences are not significant and couldn’t affect the measured FEV1.0% (=FEV1.0/FVC %) values showed both increasing in EG(t=-1.48, P =0.16) and in CG(t=-0.23, P =0.82). The expiratory flow rate including PEF, FEF25-75, MEF75, MEF50 increased in EG (t are -0.72, -0.69, -0.87 and -0.36 respectively with P all greater than 0.05) while decreased in CG (t are 1.67, 0.50, 1.53 and 0.71 respectively with P all greater than 0.05). MEF25 is the expiratory flow index of not affected by respiratory muscle force and the measured values of MEF25 increased in the EG (t=-0.68, P =0.51) and in the CG (t=-0.36, P =0.72). Conclusion: Water immersion and water temperature during diving exposure could cause and accelerate hemodynamic changes in pulmonary circulation induced pulmonary interstitial edema and led to the increase of external respiratory work. Instant effects of diving exposure in the study are quite consistent with the long-term cumulative effect of professional divers in previous research, which is FVC reduced because small airway become narrower. The results illustrate even the small depth of short-range diving exercise have definite influences on pulmonary ventilation, which mainly comes from the environmental factor but not the pressure increases.

scholarly journals Economic Increase and Concentration of Economics Activities in Secondary Markets in Cotonou: From 2013 to 2016

2020 ◽  
Vol 5 (3) ◽  
pp. p172
Author(s):  
Hortensia Vicentia ACACHA-ACAKPO
Keyword(s):  
Positive Impact ◽  
Public Infrastructure ◽  
Economic Activities ◽  
Short Term ◽  
Secondary Markets ◽  
Tax Revenues ◽  
The Impact ◽  
The City ◽  
Positive Effect

Accelerating municipal revenues is very important for good decentralization. In Benin, despite the difficulties, the municipality of Cotonou is trying to put in place mechanisms to significantly improve its income. Thus, this research aims to analyze the impact of the concentration of economic activities on the increase in non-revenue taxation in the city of Cotonou specifically on secondary markets from 2013 to 2016. Results from an estimate of an ARDL model show that, in the short term, market rights and revenues from public latrines have a positive impact on non-tax revenues. The effect of place rights on the market is not significant, while revenues from the operation of public latrines have a significant impact on non-tax revenues. In the long term, the study reveals that marketing rights have a positive effect on non-tax revenues, but not in a very significant way. Revenues from the operation of public latrines, on the other hand, still have a positive impact on non-tax revenues. It is therefore urgent to find adequate answers since marketing rights and public infrastructure revenues must be the driving force behind the growth of non-tax revenues and, in turn, total revenues.

scholarly journals Long-Term and Short-Term Effects of Hemodialysis on Liver Function Evaluated Using the Galactose Single-Point Test

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Yi-Chou Hou ◽  
Wen-Chih Liu ◽  
Min-Tser Liao ◽  
Kuo-Cheng Lu ◽  
Lan Lo ◽  
...  
Keyword(s):  
Liver Function ◽  
Single Point ◽  
Liver Blood Flow ◽  
Hepatic Clearance ◽  
Short Term ◽  
Before And After ◽  
One Year ◽  
The Impact ◽  
Mean Time

Aim. The galactose single-point (GSP) test assesses functioning liver mass by measuring the galactose concentration in the blood 1 hour after its administration. The purpose of this study was to investigate the impact of hemodialysis (HD) on short-term and long-term liver function by use of GSP test.Methods. Seventy-four patients on maintenance HD (46 males and 28 females, 60.38 ± 11.86 years) with a mean time on HD of 60.77 ± 48.31 months were studied. The GSP values were compared in two groups: (1) before and after single session HD, and (2) after one year of maintenance HD.Results. Among the 74 HD patient, only the post-HD Cr levels and years on dialysis were significantly correlated with GSP values (r=0.280,P<0.05andr=-0.240,P<0.05, resp.). 14 of 74 patients were selected for GSP evaluation before and after a single HD session, and the hepatic clearance of galactose was similar (pre-HD 410 ± 254 g/mL, post-HD 439 ± 298 g/mL,P=0.49). GSP values decreased from 420.20 ± 175.26 g/mL to 383.40 ± 153.97 g/mL after 1 year maintenance HD in other 15 patients (mean difference: 19.00 ± 37.66 g/mL,P<0.05).Conclusions. Patients on maintenance HD for several years may experience improvement of their liver function. However, a single HD session does not affect liver function significantly as assessed by the GSP test. Since the metabolism of galactose is dependent on liver blood flow and hepatic functional mass, further studies are needed.

scholarly journals The Impact of FDI on the Economic Growth of the Yangtze River Economic Belt: An Empirical Study Based on VAR Model

2021 ◽  
Vol 251 ◽  
pp. 01076
Author(s):  
Zhuhui Wu
Keyword(s):  
Economic Growth ◽  
Economic Development ◽  
Yangtze River ◽  
Positive Impact ◽  
Var Model ◽  
The Yangtze River ◽  
Short Term ◽  
Dynamic Relationship ◽  
The Impact

FDI is very important to the economic development of a region. The Yangtze River economic belt is one of the important economic core regions in China. In order to study the impact of global foreign direct investment on the economic growth of the Yangtze River economic belt, this paper uses VAR model to analyze the dynamic relationship between FDI and GDP in the Yangtze River economic belt. The results show that FDI has a positive impact on the growth of the Yangtze River Economic Belt in the short term, but not in the long term. At the same time, the economic development of the Yangtze River economic belt has a positive impact on FDI.

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