Development of a novel biofeedback system for the sprint start

This study developed and evaluated a novel concurrent biofeedback system for the sprint start. Previous studies have investigated sprint start biofeedback applications, but these have either not considered important kinematics, coaching implications or key motor learning principles. The biofeedback system was developed to convey rear knee angle information, obtained from 3D motion capture to novice participants as changes in the colour of an LED start line when they were in the “set” position. Based on initial user feedback, the system indicated whether the participants’ rear knee angles were within ± 2° of 130° (green) or not (red). A two-group experimental study was then employed to explore the acute responses of novices to the use of the biofeedback system during the sprint start. When exposed to biofeedback, the experimental group (EXP, n = 10) exhibited less deviation (4.0 ± 2.4°) from the target rear knee angle than they did in either a pre-test (11.9 ± 6.9°) or post-test (10.4 ± 4.4°) condition without biofeedback. The control group (CON, n = 10) with no biofeedback exhibited greater deviation from the target rear knee angle than the EXP group in all three condition blocks (pre-test = 21.8 ± 15.1°, no intervention = 15.6 ± 7.3°, post-test = 14.3 ± 6.5°) but the group × condition interaction effect was not significant (P = 0.210). The novel biofeedback system can be used to manipulate selected “set” position kinematics and has the potential to be incorporated with different input systems (e.g. inertial measurement units (IMUs)) or in longitudinal designs.

Interaction of exercise bioenergetics with pacing behavior predicts track distance running performance

The best possible finishing time for a runner competing in distance track events can be estimated from their critical speed (CS) and the finite amount of energy that can be expended above CS (D'). During tactical races with variable pacing, the runner with the 'best' combination of CS and D' and, therefore, the fastest estimated finishing time prior to the race, does not always win. We hypothesized that final race finishing positions depend on the relationships between the pacing strategy employed, the athletes' initial CS, and their instantaneous D' (i.e., D' balance) as the race unfolds. Using publicly available data from the 2017 IAAF World Championships men's 5,000 m and 10,000 m races, race speed, CS, and D' balance were calculated. The correlation between D' balance and actual finishing positions was non-significant utilizing start-line values but improved to R2 > 0.90 as both races progressed. The D' balance with 400 m remaining was strongly associated with both final 400 m split time and proximity to the winner. Athletes who exhausted their D' were unable to hold pace with the leaders, whereas a high D´ remaining enabled a fast final 400 m and a high finishing position. The D' balance model was able to accurately predict finishing positions in both a 'slow' 5,000 m and a 'fast' 10,000 m race. These results indicate that while CS and D' can characterize an athlete's performance capabilities prior to the start, the pacing strategy that optimizes D' utilization significantly impacts final race outcome.

Sprint Mechanical Characteristics of Female Soccer Players: A Retrospective Pilot Study to Examine a Novel Approach for Correction of Timing Gate Starts

The purpose of this study was to compare model estimates of linear sprint mechanical characteristics using timing gates with and without time correction. High-level female soccer players (n = 116) were evaluated on a 35-m linear sprint with splits at 5, 10, 20, 30, and 35 m. A mono-exponential function was used to model sprint mechanical metrics in three ways: without a time correction, with a fixed (+0.3 s) time correction, and with an estimated time correction. Separate repeated-measures ANOVAs compared the sprint parameter estimates between models and also the residuals between models. Differences were identified between all modeled sprint mechanical metrics; however, comparable estimates to the literature occurred when either time correction was used. Bias for both time-corrected models was reduced across all sprint distances compared to the uncorrected model. This study confirms that a time correction is warranted when using timing gates at the start line to model sprint mechanical metrics. However, determining whether fixed or estimated time corrections provide greater accuracy requires further investigation.

The effects of locations on the build tray on the quality of specimens in powder bed additive manufacturing

In this study, the effect of powder spreading direction was investigated on selectively laser-melted specimens. The results showed that the metallurgical properties of the specimens varied during fabrication with respect to their position on the build tray. The density, porosity, and tensile properties of the Co–Cr–W–Mo alloy were investigated on cuboid and tensile specimens fabricated at different locations. Two different significant positions on the tray were selected along the powder spreading direction. One set of specimens was located near the start line of powder spreading, and the other set was located near the end of the building tray. The main role in the consequences of powder layering was played by the distribution of powder particle sizes and the packing density of the layers. As a result, laser penetration, melt pool formation, and fusion characteristics varied. To confirm the occurrence of variations in sample density, an additional experiment was performed with a Ti–6Al–4V alloy. Furthermore, the powders were collected at two different fabricating locations and their size distribution for both materials was investigated.

Smart KOT App Generation using an Android Application

One of the maximum critical levels of serving your visitors is to take their orders correctly. It is taken into consideration to be the start line of the patron’ s evaluation of your services. It is likewise the maximum fundamental step within the system of serving the right food to the proper patron. It is incredible how era can revolutionize the best yet crucial practices of hoteliers, and the Kitchen Order Token / Ticket app is a tremendous example of the same. In the traditional method, the order is taken by the waiter manually by using a pen and paper that is referred to as the Kitchen Order Token / Ticket. Usually had to be printed as duplicates(or triplicates in a few cases), traditional Kitchen Order Token / Ticket techniques serve to create miscommunication, consume greater time, and are extra vulnerable to manual mistakes. In this paper mainly concentrate on the Android application is used in the android platform Tablets for taking orders from the customer near their tables only. The app is used by the waiters to take down the orders. The particular device will be given to the waiters in the organization with their username and password logged in respectively. This app will act as the user end application and the server will be the web application (server) that is managed by the Administrator.

Get(ting) to the Start Line – the evaluation of an innovative intervention to address adolescents’ school-related stress and anxiety

There are growing concerns over young people’s mental health, the academic pressures they face, and the association between school-related stress and health. Given this, alongside the known benefits of physical activity for psychological health, the need for school-based interventions with a physical activity focus seems justified. This paper reports on findings from the evaluation of a pilot of ‘Get to the Start Line’, an innovative school-based programme designed to address adolescents’ school-related stress and anxiety. The research adopted a mixed-methods approach and a pre- and post- design. Six schools from the East Midlands, UK, and selected year 11 pupils (aged 15–16) identified as experiencing examination-related stress and anxiety, participated in the programme. The programme was coordinated by a school champion (a staff member), delivered by an athlete mentor, and comprised six workshops. Data were collected from school champions and athlete mentors via an online survey following each workshop, and via semi-structured focus groups and interviews with pupils and school champions, respectively, pre-, mid- and post-intervention. Schools also provided relevant pupil data. The findings revealed the programme to be positively received by most pupils and to result in positive outcomes such as reported reductions in examination-related stress and anxiety for some, and fewer pupil well-being referrals. However, various challenges and limitations of the programme were identified, and recommendations were made for its future development. Therefore, whilst some of the findings were encouraging, further research into the implementation and impact of this and other such programmes is needed.

Acaricidal Activity of Mongolian Plants Against Dermacentor nuttalli

Dermacentor nuttalli is the most commonly distributed tick species in Mongolia, and responsible for huge economic losses related to tick-borne diseases in livestock industry. Many rural herders have used plants to control tick which is noted in few documents, mostly transferred orally through generations. The aim of the present study was to determine acaricidal activity of Mongolian plants against D. nuttalli. We checked acaricidal activity of 113 crude extracts of 76 plant species included in 26 families. Among them Amaranthus retroflexus root (40%), Ephedra sinica leaf (40%), Erigeron acer root (40%), Ranunculus japonicus root (42%), and Spiraea salicifolia leaf (43.5%) showed potential activity against D. nuttalli. Acaricidal activity of Mongolian plants were experimented in vitro condition in first time. Furthermore, the study will continue isolation and identification active ingredients of potential candidates. We hope this study will be start line of acaricidal activity research in our country. Монгол орны ургамлын Акарицид (хачиг үхүүлэх) идэвхийн судалгаа Монгол орны бүх бүс нутагт Dermacentor nuttalli зүйл хачиг өргөн тархсан төдийгүй мал аж ахуйд хамгийн их хор хөнөөл учруулдаг. Малчид хачиг, шавжтай тэмцэхэд зарим ургамлыг ханд, цацлага, утлага хэлбэрээр хэрэглэж ирсэн уламжлалтай ч түүний шинжлэх ухааны үндэслэлтэй эсэхийг тогтоох судалгаа төдийлөн хийгдээгүй байна. Бид энэ удаа D. nuttalli хачиг дээр турших цуврал судалгааны ажлыг эхлүүлэх зорилго тавин ажиллав. Нийт 26 овогт хамаарагдах 76 зүйл ургамлын 113 дээж дээр акарицид идэвхийг шалгахад, тэдгээрээс Урвуу гагадайн (Amaranthus retroflexus) үндэс, Нангиад зээргэний (Ephedra sinica) навч, Хахуун цийлэгийн (Erigeron acer) үндэс тус бүр 40%, Япон холтсон цэцгийн (Ranunculus japonicus) үндэс 42%, Бургас навчит тавилганы (Spiraea salicifolia) навч 43.5% буюу бусад ургамлаас илүү идэвх үзүүлж байв. Энэхүү судалгаагаар анх удаа Монгол орны хачиг дээр in vitro орчинд туршин сорих арга зүйг нэвтрүүллээ. Энэ нь цаашид ургамлаас хачгийн эсрэг үйлдэлтэй бодис, нэгдэлийг хайж илрүүлэх, цуврал суурь судалгааны ажлын эхлэл болж өгч байгаагаараа чухал ач холбогдолтой юм. Түлхүүр үг: акарицид (хачиг үхүүлэх) идэвх, хачиг, Dermacentor nuttalli, ургамал

ADMINISTRASI KURIKULUM

The term etymology curriculum comes from Latin, namely curricular which means the distance that must be traveled by a runner. And in French, the term curriculum comes from the word courier which means to run. So that the curriculum means a distance that must be traveled by a runner from the start line to the line up to the finish line to get a medal or award. The distance traveled is then changed to a school program and everyone involved in it. Thus in a narrow sense the curriculum is defined as a number of subjects that must be studied by students within a certain period. And in a broad understanding the curriculum is defined by all learning experiences provided to students, as long as they attend education and learning in certain schools or educational institutions.