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  • 1
    Online Resource
    Online Resource
    Ergonomic Assessment of Multi Calibre Individual Weapon System in Virtual Reality Platform
    Defence Scientific Information and Documentation Centre ; 2019
    In:  Defence Science Journal Vol. 69, No. 3 ( 2019-04-30), p. 240-248
    Details
    In: Defence Science Journal, Defence Scientific Information and Documentation Centre, Vol. 69, No. 3 ( 2019-04-30), p. 240-248
    Abstract:      The primary objective of the study was to assess the compatibility of multi calibre individual weapon system (MCIWS) with the shorter, medium and larger individual users of Indian Army. Three dynamic digital human models (DHM) 5thp, 50thp, 95thp army pooled (AP) population were considered to accommodate wide range (more than 90 per cent) of the army population for ergonomic analysis of the weapon system with the help of digital human modelling software Jack. Solid model of MCIWS which was in Parasolid file format X_T (*.x_t) was imported into NX5 (solid model design software) and subsequently converted to JT (*.jt) format. This solid model was later translated into Jack 5.0.1 environment. Standing, squatting and crawling with the weapon were adopted for the study. Angular deviations of important joints, posture prediction using OWAS, and comfort discomfort assessment using Dreyfus 3D method were carried out in the study. The result of the study revealed that the operation in squatting and crawling conditions may increase postural load on neck, shoulder and upper arm. The pistol grip size, shape and contour are acceptable for the taller population. Removal of corrugated gripping surface, reduction of grip diameter and space adjustment for gloves use will be effective for optimal use. The position and size of fore grip seemed suitable for the taller users. Sight system could be accessed by all three user populations. It is advised to avoid holding the weapon for long duration with hands to prevent overuse injury or undue fatigue.
    Type of Medium: Online Resource
    ISSN: 0976-464X , 0011-748X
    URL: Article
    DOI: 10.14429/dsj.69.14426
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2019
    detail.hit.zdb_id: 2410464-4
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  • 2
    Online Resource
    Online Resource
    Cardio-respiratory and biochemical responses of military training event at Jungle environment
    Nepal Journals Online (JOL) ; 2021
    In:  Asian Journal of Medical Sciences Vol. 12, No. 4 ( 2021-04-01), p. 15-23
    Details
    In: Asian Journal of Medical Sciences, Nepal Journals Online (JOL), Vol. 12, No. 4 ( 2021-04-01), p. 15-23
    Abstract: Background: In military environment, soldiers regularly practice or undergo different types of extreme training activities. However, globally the literatures available on the physiological and biochemical demand of different extreme military training activities are very scanty and less reported. Aims and Objective: The present study was undertaken to quantify the cardio-respiratory and biochemical responses of military training event in jungle environment. Materials and Methods: Mathew’s Mad Mile (MMM) activity is a type of specialized run of 1.5 mile in jungle environment. This training activity was conducted on rugged jungle terrain comprised of undulated uphill, downhill, muddy surface. Twenty-five SHAPE-1 healthy soldiers were volunteered into training event. Cardiorespiratory data was recorded continuously throughout the event and venous blood sample was drawn before and immediately after completion of the event. Statistical significance was considered at p 〈 0.05. Results: There was no significant difference observed in heart rate and breathing rate while core body temperature was significantly (p = 0.02) higher in slow finisher as compared to fast finisher. In fast finisher, post exercise level of BDNF, BNP, SDH, cortisol and UCP1 increased significantly (p 〈 0.05), whereas, BHB (p 〈 0.01) decreased significantly in comparison to pre-exercise. In slow finishers, post exercise level of cortisol, KYNA and UCP1 increased significantly (p 〈 0.05), whereas, BDNF, BNP and SDH decreased significantly (p 〈 0.05), in comparison to pre-exercise. Conclusion: The outcome of this study indicated that the slow finishers were more susceptible to risk of injury due to higher exercise induced thermogenesis and mental stress in comparison to fast finisher.
    Type of Medium: Online Resource
    ISSN: 2091-0576 , 2467-9100
    URL: Article
    DOI: 10.3126/ajms.v12i4.33923
    Language: Unknown
    Publisher: Nepal Journals Online (JOL)
    Publication Date: 2021
    detail.hit.zdb_id: 2894889-0
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  • 3
    Online Resource
    Online Resource
    Effect of Combat Vehicle Operation on Cognitive Workload and Performance
    Defence Scientific Information and Documentation Centre ; 2021
    In:  Defence Life Science Journal Vol. 6, No. 2 ( 2021-06-03), p. 177-186
    Details
    In: Defence Life Science Journal, Defence Scientific Information and Documentation Centre, Vol. 6, No. 2 ( 2021-06-03), p. 177-186
    Abstract: Multifaceted stress factors related to infantry combat vehicle (ICV) operation may be considered as major a source of cognitive workload, which may significantly impact the performance of infantry soldiers. The available literature on the effect of ICV’s operational environment on soldier’s cognitive workload is scanty or mostly unreported. The present study was designed to observe the effect of ICV operation on the i) cognitive workload ii) cognitive performance and iii) to study the association between cognitive workload and performance. Thirty soldiers [mean(SD)- age: 31.86(2.9) years, weight: 74.40(7.7) kg, and height: 171.33(3.42) cm] volunteered for this study. Their heart rate (HR), heart rate variability (HRV) and respiratory frequency (RF) were recorded at three time points 00th-05th, 25th-30th and 55th-60th minute during the ICV operation. ‘A’ letter cancellation task (ALCT) was conducted to assess cognitive performance, before and after ICV operation. The internal temperature and relative humidity (RH) of ICV were assessed at same three time-points. Repeated measure ANOVA and Wilcoxon signed ranks test were conducted to observe significant changes in HR, HRV, RF, and cognitive performance. Association between HRV and ALCT was assessed using Pearson’s bivariate correlation. Changes were considered significant when p-value was ≤ 0.05. Significant increase in the HR and RF were observed along with significant decrease in both time and frequency domain of HRV after ICV operation. Similarly, ALCT showed a significant increase in the total and net score, and an increased error score in post-ICV operation. A strong positive correlation was observed between the ICV operation run-trial time and the increasing compartmental temperature (r=0.99) and RH (r=0.89). HRV components showed a negative correlation with ALCT measures. One hour of ICV operation resulted in increased cognitive workload and a significant decrease in the cognitive task performance. Internal temperature and RH of ICV are potential physical stress factors affecting the soldier’s workload and performance.
    Type of Medium: Online Resource
    ISSN: 2456-0537 , 2456-379X
    URL: Article
    DOI: 10.14429/dlsj.6.16818
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2021
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  • 4
    Online Resource
    Online Resource
    Quantification of Mental and Physiological Workload Associated with two Specialised Military Running Events on Different Terrains
    Defence Scientific Information and Documentation Centre ; 2022
    In:  Defence Life Science Journal Vol. 7, No. 3 ( 2022-09-13), p. 169-178
    Details
    In: Defence Life Science Journal, Defence Scientific Information and Documentation Centre, Vol. 7, No. 3 ( 2022-09-13), p. 169-178
    Abstract: Intense training regimes are practiced across military facilities to develop soldiers’ mental and physical abilities to meet the demands of modern-day warfare. Two short-duration military runs through the jungle and flat natural tracks were selected to quantify their mental and physiological workloads and explore track-specific differences. Two groups of healthy Indian soldiers (n=43 and 30; similar age, height, and weight) participated in time-bound 2.4 km runs on the jungle and flat natural tracks. Physiological variables, speed, and elevation with environmental parameters like temperature and humidity were recorded throughout the exercises. Subjective responses through NASA-TLX questionnaires were collected after the exercises. Mann-Whitney ‘U’ test was applied to find out the level of significance between groups.Physiological demands of runs on the jungle and flat natural track were similar (heart rate- 178.9 and 178.4 b/min; breathing rate- 42.0 and 46.6 breaths/min respectively; body temperature- 37.6℃ for both groups). The run on the jungle track needed a lower peak acceleration of 2.5 g (2.9 g on the flat track) and a higher variation in speed (4-16 knots). Participants expressed significantly high responses after the run on the jungle track. Run on the jungle track was physically intense, required adjustments in speed and acceleration to negotiate with the natural obstacles like uneven terrain and slippery surfaces. Besides this, environmental heat and higher humidity probably led to an increase in mental workload. The run on the flat natural track needed steady physical effort, fewer mechanical adjustments, and showed lower subjective responses.
    Type of Medium: Online Resource
    ISSN: 2456-0537 , 2456-379X
    URL: Article
    DOI: 10.14429/dlsj.7.17841
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2022
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  • 5
    Online Resource
    Online Resource
    Assessment of Muscular Fatigue with Electromyography on Lower Back and Leg Muscles during Continuous Uphill and Downhill Load Carriage Task
    Defence Scientific Information and Documentation Centre ; 2017
    In:  Defence Life Science Journal Vol. 2, No. 1 ( 2017-03-29), p. 21-
    Details
    In: Defence Life Science Journal, Defence Scientific Information and Documentation Centre, Vol. 2, No. 1 ( 2017-03-29), p. 21-
    Abstract: 〈 p 〉 Soldiers of Indian Army need to carry moderate to heavy load in complex terrain conditions as their routine activity, which may prove to be highly tiring for leg and back muscles. Soldiers’ regular movement at hilly area was simulated in a study consisting of a continuous uphill (UH) and downhill (DH) load carriage task to monitor state of fatigue at back and lower limb muscles. Twelve Indian soldiers walked at a fixed speed on five UH and five DH gradients with three loads (0, 10.7 kg and 21.4 kg). Electromyographic (EMG) recording was carried out throughout the experimentation on four groups of muscles- left and right Erector spinae (ESR and ESL), Vastus medialis (VMR and VML), Gastrocnemius medialis (GMR and GML), and Soleus (SOR and SOL) muscles. Median frequency (MDF) responses of tested muscles were derived from raw (EMG) data. Higher level of muscle fatigue was observed at highest UH inclination as the MDF response in GMR, GML and VMR was lowest at this point. The MDF response were found to be lower at DH gradients as the physical demand of that stage is less than the UH gradients. 〈 /p 〉
    Type of Medium: Online Resource
    ISSN: 2456-0537 , 2456-379X
    URL: Article
    DOI: 10.14429/dlsj.2.11018
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2017
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  • 6
    Online Resource
    Online Resource
    Effect of Queen’s College Step Test on Cognitive Performance among Young Adults
    Department of Sport Management, University of Peloponnese ; 2017
    In:  journal biology of exercise Vol. 13, No. 1 ( 2017-04-27), p. 59-75
    Details
    In: journal biology of exercise, Department of Sport Management, University of Peloponnese, Vol. 13, No. 1 ( 2017-04-27), p. 59-75
    Type of Medium: Online Resource
    ISSN: 2241-6331
    URL: Journal
    URL: Article
    DOI: 10.4127/jbe
    DOI: 10.4127/jbe.2017.0116
    Language: Unknown
    Publisher: Department of Sport Management, University of Peloponnese
    Publication Date: 2017
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