World and European Rowing Medallists Pace With Smaller Variation Than Their Competitors

Purpose: To establish the relation between pacing pattern and performance, within sex, and number of crew members, at the very highest performance level in World class rowing.Methods: Pacing profiles based on official 500 m split times in 106 A-finals with six contesting boat crews (n = 636 crews), in recent World (2017–2019) and European (2017–2021) championships, were analyzed. The coefficient of variation (CV) and sum of relative differences (SRD) of the split times, and normalized velocities in the four segments of the race, were compared between performance levels, that is, placement (1st–6th), and subgroups based on sex (female or male) and number of crew members (one, two, or four). Statistical tests and resulting p-values and effect sizes (Cohen's d) were used to assess differences between groups.Results: The pacing profiles of the medallists had smaller variation than those of the non-podium finishers (CV = 1.72% vs. CV = 2.00%; p = 4 × 10−7, d = 0.41). Compared to the non-podium finishers, the medallists had lower normalized velocities in the first and second segments of the race, slightly higher in the third segment and higher in the fourth segment. Female crews paced somewhat more evenly than male crews. No significant differences were found in the evenness of pacing profiles between singles, doubles/pairs and quads/fours. Analyses of SRD were overall consistent with analyses of CV.Conclusion: Medal winners in major rowing championships use a more even pacing strategy than their final competitors, which could imply that such a strategy is advantageous in rowing.

Can and should refugees and communities that host them expect better performing and resilient water supply services?

During the acute phase of an emergency the priority for humanitarian agencies is to rapidly establish water supply and other basic services (e.g. sanitation, hygiene, and solid waste) for people affected by disaster or crisis. However, the immediate response to an emergency is relatively short in duration, while the services, particularly water supply, often need to meet the needs of affected populations for many years. Often crises are protracted in nature and it is therefore important to understand how service performance evolves and whether service users are satisfied with the level of water supply. This is an important consideration because long-term sustainability may not represent an important part of initial thinking by humanitarian agencies. The United Nations High Commission for Refugees estimates the average time spent by a refugee in a camp is 10 years, while the average refugee camp remains for 26 years. Two questions arise: first, how will humanitarian agencies ensure emergency water supplies reach the desired performance levels; second, how will local institutions be able to manage, modify and finance the services that camp or settlement dwellers and host communities will depend upon. In this chapter the authors explore experiences from two country case studies and monitoring data extracted from ongoing humanitarian crises. The main conclusions are: service level enhancements are often slow to materialise and widespread efforts are required to raise performance levels.

Reliability of Peak Running Velocity Obtained on the Track Field in Runners of Different Performance Levels

The aim of this study was to verify the reliability of peak running velocity obtained on the track field (Vpeak_TF) in runners of different performance levels. 39 male endurance runners were divided into two groups: trained runners (TR; n = 22; 10-km time running performance of 35.2 ± 1.7 min), and recreational runners (RR; n = 17; 10-km time running performance of 51.3 ± 4.8 min). They performed three maximal incremental running tests on the official track field (400 m), with an interval of 1 week between trials to determine the reliability of Vpeak_T. The Vpeak_TF showed high reliability, presenting an intraclass correlation coefficient and coefficient of variation of 0.97 and 1.28%, and 0.90 and 1.24% for TR and RR, respectively. Both TR and RR showed lowest bias and limits of agreement between test and retest (Vpeak_TF1 and Vpeak_TF2). In addition, there was no statistical test-retest difference for Vpeak_TF. In addition, the HR and RPE submaximal values were reliable for both TR and RR. Therefore, the Vpeak_TF showed high reliability in both TR and RR. These findings reinforce that the protocol for determining Vpeak_TF, using increments of 1 km h–1 every 3 min is reliable regardless of the performance level of the runners.

Concept Evolution and Multi-Dimensional Measurement Comparison of Urban Energy Performance from the Perspective of System Correlation: Empirical Analysis of 142 Prefecture Level Cities in China

In order to clarify the evolution characteristics and direction of urban energy performance concepts, reveal the research dimensions, determine the performance results and differences, and clarify the reference benchmark, this study depicts the main systems involved in the process of urban energy utilization, demonstrates their relevance guided by the system view, and proposes the measurement indicators in the economic, environmental, and well-being dimensions. The measurement model of each dimension is constructed using the corresponding models of Data Envelopment Analysis. Taking 142 prefecture level cities in China as examples, the energy performance in different dimensions is measured and compared. The energy performance levels are close in the economic and environmental dimensions. However, the results of the well-being dimension are different from these first two dimensions, and the performance levels among cities differ more. In the economic, environmental, and well-being dimension, 22, 28 and 16 cities have reached the effective frontier, respectively, and the performance benchmark cities of 15, 15 and 5 provinces are non-provincial capital cities, respectively. Based on the above analysis, the “chain” framework evolution direction of concept and measurement is proposed, and this study provides benchmarks and policy suggestions to improve energy performance.

Effects of the COVID-19 Pandemic Outbreak on the Performance of Sign Language Interpreters

In general, stress affects the efficiency of workers’ performance. With the coronavirus disease 2019 pandemic outbreak, sign language interpreters experience increased stress due to various factors. This study aims to determine the stressors faced by sign language interpreters during the pandemic. To achieve this goal, we prepared a questionnaire consisting of 15 paragraphs covering psychological, health, cognitive, linguistic and environmental aspects. Then, we surveyed 57 sign language interpreters in the Arab region. In the analysis, we calculated the average performance levels in addition to the differences between participants’ average scores. We also divided the stress levels into three categories: simple, moderate and severe. Results indicated that the stress was medium on average and no statistically significant differences in the performance average in accordance with the study variables (gender, experience and workplace).