Three Dimensional Biomechanical Analysis of the Drag in Penalty Corner Drag Flick Performance

Penalty corner in field hockey is a complex motor skill. It required high level of coordination. The aim of this study was to provide important biomechanical variables related information for the Sports biomechanist, Young sports scientist, Coaches and also for drag flick specialist for their performance enhancement programs. Four specialist male drag-flickers of two different universities namely  LNIPE, Gawalior , and Aligarh Muslim University , Aligarh, age range 19-25 years, height ranged 174-182cm and weight range  59.4- 66.8 Kg. and all having six to eight years of experiences were participated in this study. Three dimensional (3D) experimental setup was conducted for the study. All of the measurements were carried out on the Asto truf ground in their respective universities fields. Two video cameras Canon Legria SF-10 were used to capture all drag flick trials. The shuttering speed of cameras were set on 1/1000 and 50hz frame rate. Both cameras were set with the help of tripod placed at right side of the subjects mounted at a height of 1.2m. During captured drag flick, the distances of cameras were set at 13m and 17m from the stationary ball position and  optical axes of the recording cameras were intersect each other on the subject at 90° and 60° respectively to right side  in a field setting.  The drag flickers and ball movement during the drag flick phase were recorded. Videos footages were edited and synchronized for 3D biomechanical analysis. DLT method was used to calibrate of both the cameras. The drag distance, stride length, ball velocity and acceleration, angles, linear and angular velocity and linear and angular acceleration of shoulder, knee, elbow, wrist of left and right side were digitized and three dimensional data was obtained with the help of Max TRAQ 3D motion analysis software.SPSSv.16. was used to calculate the selected parameters and statistical analysis mean and standard deviations. T-test was used to find out the comparison between LNIPE, Gawalior and A.M.U.Aligarh. And the result was found that drag distance and hockey stick blade, linear velocity of shoulder (L&R), pelvic (L&R), Knee (L) and wrist (R),angular velocity of shoulder (L&R), elbow (L&R), pelvic(L&R), Knee(L), ankle(R)  and wrist(R), linear acceleration of hockey stick blade and ball, shoulder (L), Knee(R), ankle(R) and toe(R), angular acceleration of wrist (R) and joint angles of  shoulder (L&R), elbow (L), wrist (R) and ankle(R) during drag differs significantly and hence does influences on drag flick technique under accuracy condition. Keywords: Drag of Dragflick, Biomechanical, Three Dimensional, Motion analysis, performanc

Three Dimensional Analysis of Drag-flick in The Field Hockey of University Players

The penalty corner one of the most important technique to score the goal in field hockey. The penalty corner depends upon three different technical applications like push, stop and drag. Technical application of drag flick in penalty corner covered maximum number of successful goal. The main aim of this study was to analyze spatial and temporal kinematics in the drag flick of elite field hockey players. Two main drag flickers from Aligarh Muslim University, Aligarh hockey team were selected as a subject for this study. The body weight, Height and Age of each subject ware recorded subsequently Sub1=65 kg body weight, 180.50cm of height and 19 years of age and Sub2= 60 kg body weight, 167.00 cm of height and 19 years of age. A static calibration method was used to capture drag flick by Two Cameras, sampling at 50 Hz. Six successful trials at target were selected from each subject for the study.  Videos of selected trials were digitized by the Max Track 3D motion analysis software. The three dimensional (3D) motion was determined from digitized video analysis using 18-point body model together. Results of this study shows that spatial / temporal variable between the players, there exist little difference in stance width in ball contact phase, recommended that little or no difference exist in techniques between both players. Key points: spatial / temporal, kinematics, drag, digitized.

Security Challenges in Central University Libraries in India

Safety and security are substantial issues for all kinds of libraries in the present time. It is an ever-evolving subject that should be discussed coherently. This paper attempts to scrutinize security challenges faced by two major funded university libraries in India, i.e., Maulana Azad Library, Aligarh Muslim University, Aligarh, and Dr. B.R. Ambedkar Central Library, Jawaharlal Nehru University, New Delhi. It looks at the measures adopted by these libraries to ensure their collection\u27s safety and explores the reasons and methods of theft, mutilation, and misplacement of the library collection. The survey research method was employed. Two separate questionnaires were used to collect data from the librarians and clientele of the above-said universities. Random Sampling was used to collect data from the library users. The result of the analysis revealed that, like other libraries, these two libraries are not entirely free from the threat of stealing, marring, and misplacement of their collection. It is also discovered that the percentage of mutilation of library documents is high in both libraries compared to theft. Users adopt various methods for stealing library documents. Some suggestions are also proffered to eradicate theft and mutilation, like providing multiple copies of books, installation of RFID and Biometrics

JOINT EFFECT OF STRIDE LENGTH AND STRIDE WIDTH ON RUNNING PERFORMANCE

The purpose of this study is to describe joint effect of stride length and stride width on running performance of 100m sprinters and 5000m distance runners during completion. Twenty runners (Ten100m sprinters & Ten 5000m distance) from All India Athletic Meet were selected for the study. The aged ranged from 18-25years, height ranged from 1.56-1.85 m, body weight ranged from 49 - 75 kg were of subjects. The subject’s running motion was recorded using two Synchronised video cameras. One was secured to 2m behind 100m starting line for recording stride width and second was secured 18m away from first lane and 50 m from starting line in filed area for recording the stride length. Softwares MPEG, Photo Studio, SthSDVD , Coral-5 , Coral –9 , Player, and SPSS Software were used to analysed recorded data. F- Test has been applied to know the joint effect of stride length and stride width on running performance timings. The result was found that joint effect of stride length and stride width have significant effect on sprinter’s running while joint effect of stride length and stride width have no significant effect on 5000m long distance running. Statistical significance was set at P< 0.05

Zero-field slow magnetic relaxation behavior of Zn₂Dy in a family of trinuclear near-linear Zn₂Ln complexes: synthesis, experimental and theoretical investigations

In the series of Schiff base supported Zn2Ln complexes 1-La–6-Dy, the SIM behavior observed only for 6-Dy (Ueff = 43.7 K). The ab initio theoretical calculations rationalized the experimentally observed magnetic behaviors for all.</jats:p