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  • Defence Scientific Information and Documentation Centre  (13)
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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
    Online Legal Information System (OLIS) Leveraging Access to Legal Information Resources in Indian Environment
    Defence Scientific Information and Documentation Centre ; 2016
    In:  DESIDOC Journal of Library and Information Technology Vol. 36, No. 1 ( 2016-01-22), p. 47-55
    Details
    In: DESIDOC Journal of Library and Information Technology, Defence Scientific Information and Documentation Centre, Vol. 36, No. 1 ( 2016-01-22), p. 47-55
    Type of Medium: Online Resource
    ISSN: 0974-0643 , 0976-4658
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.14429/djlit.36.1
    DOI: 10.14429/djlit
    DOI: 10.14429/djlit.36.1.9271
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2016
    detail.hit.zdb_id: 2592694-9
    detail.hit.zdb_id: 2592696-2
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  • 3
    Online Resource
    Online Resource
    Use of Online Citation Tools by Students and Research Scholars of Department of Library and Information Science, University of Delhi
    Defence Scientific Information and Documentation Centre ; 2016
    In:  DESIDOC Journal of Library & Information Technology Vol. 36, No. 3 ( 2016-04-26)
    Details
    In: DESIDOC Journal of Library & Information Technology, Defence Scientific Information and Documentation Centre, Vol. 36, No. 3 ( 2016-04-26)
    Abstract: This paper finds out the citation management and the needs of students of Department of Libary and Information Science, University of Delhi, and how online citation tools fit into their academic and research process. The results indicate that all the respondents are aware of online citation tools and using them occasionally. EasyBib was the popular online citation tool among respondents. The survey results show that most of the respondents learned the online citation tools through department’s website. The main purpose of using online citation tools was for their academic/research work. Most of the respondents were accessing online citation tools from the Delhi University Computer Centre. They had not received any formal training for creating online citations. Simplified and easy bibliography and automatic creation of references list are two major benefits of online citation tools. The most obvious impediment is that they have never used the online tools before. Meagre respondents wanted training in using online citation tools for creating efficient references. The findings of the study will not only help the Library and Information Science students about knowing what a citation is and understanding the concepts of citation styles and formatting, but also help citation-related competencies and skills in recognising citations and understanding their functions in research.
    Type of Medium: Online Resource
    ISSN: 0976-4658 , 0974-0643
    URL: Article
    DOI: 10.14429/djlit.36.3.9428
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2016
    detail.hit.zdb_id: 2592694-9
    detail.hit.zdb_id: 2592696-2
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  • 4
    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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  • 5
    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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  • 6
    Online Resource
    Online Resource
    Effect of Shod Walking on Plantar Pressure with Varying Insole
    Defence Scientific Information and Documentation Centre ; 2020
    In:  Defence Life Science Journal Vol. 5, No. 4 ( 2020-10-15), p. 248-254
    Details
    In: Defence Life Science Journal, Defence Scientific Information and Documentation Centre, Vol. 5, No. 4 ( 2020-10-15), p. 248-254
    Abstract: Walking and running are very critical factors in human being’s everyday life. A human being takes more than 2,000 steps to walk 1.6 km. The human being wear a boot with insole to protect feet when walking, playing and doing various activities. The boot with insole provides significant impact on the feet during these events and transmitted through the feet due to intense force and pressure. Measurements of plantar pressure are important for diagnosing lower limb disorders, designing footwear, injury prevention and applications in sports biomechanics. The objective of this study is to investigate the plantar pressure exerted on the feet during shod walking (wearing boot with three types of insoles); to identify effective insole for reducing plantar pressure during walking (wearing same boot with three insoles). Eighteen fits, healthy male adults volunteered for this study with mean and SD (mean±SD) age (36±9) years, height (169±4) cm, and weight (71±8) kg. During experiments, each volunteer underwent 5 min of treadmill walking (4.5 km/hr speed) with wearing of boot with varying types of insoles (Low-density polyurethane (LDPU) insole 1; High-density polyurethane (HDPU), insole 2; and Silicone rubber (SR), insole 3). Plantar pressures were measured by using a foot pressure measuring device. A paired t-test was conducted to observe significant changes in plantar pressures of different foot region (P 〈 0.05). Observations of the present study revealed that plantar pressures (N/cm²*s) were minimum during the use of LDPU insole than HDPU and SR insoles. It was also noticed that during the using of LDPU insole, less plantar pressure observed in the heel (3.84 ±1.16 in right foot) followed by forefoot (right 3.92±0.88), lateral (right 3.56±0.85), and medial foot (right 3.60±0.69). Hence, the present study suggested that using LDPU insole reducing the transfer of impact forces to the body/foot in comparison to HDPU and SR insoles during walking and minimizing the risk of foot-related injuries in long term use.
    Type of Medium: Online Resource
    ISSN: 2456-0537 , 2456-379X
    URL: Article
    DOI: 10.14429/dlsj.5.15719
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2020
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  • 7
    Online Resource
    Online Resource
    DRDO and Expectations of Stakeholders
    Defence Scientific Information and Documentation Centre ; 2019
    In:  Defence Science Journal Vol. 69, No. 6 ( 2019-12-16), p. 613-618
    Details
    In: Defence Science Journal, Defence Scientific Information and Documentation Centre, Vol. 69, No. 6 ( 2019-12-16), p. 613-618
    Abstract: DRDO is India’s major credible research and development organization that enables self-reliance and indigenisation of defence technologies and weapon systems to empower India in the emerging geo-political balance. The Organisation has its genesis in a technical inspection agency which over the years have transformed into a highly professional R & D organization with strong design and technology capabilities and skilled entrepreneurship to undertake development of state-of-the-art defence systems. DRDO driven R & D efforts have catalysed the growth of domestic defence and civilian industries in the country as well. The overarching endeavours of DRDO encompassing academia, private industry and Defence PSUs have helped in establishing a self-reliant defence industrial eco-system and collectively all have contributed in the Hon’ble Prime Minister’s vision of “skill development” and “Make-in-India”. Yet, DRDO’s struggle at the national level continues since Armed Forces continue to depend on imports for major acquisitions. Indigenous options have not always established themselves as the preferred options even when they are available. The acceptability of DRDO developed products remains at a low ebb. The question is what more DRDO should do to ensure the acceptability of the users? This study examines the evolution of the DRDO and whether over the years DRDO has done enough or should do more to increase its visibility, acceptability, credibility and respectability? And how DRDO should reposition itself beyond MoD/Armed Forces in the national and international context to fulfill the ambitions of the country to play global roles? This paper also discusses how building the brand “DRDO” may possibly help DRDO. 
    Type of Medium: Online Resource
    ISSN: 0976-464X , 0011-748X
    URL: Article
    DOI: 10.14429/dsj.69.12685
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2019
    detail.hit.zdb_id: 2410464-4
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  • 8
    Online Resource
    Online Resource
    On the Kinematic Properties of Hydromagnetic Fluid Flows
    Defence Scientific Information and Documentation Centre ; 1988
    In:  Defence Science Journal Vol. 38, No. 1 ( 1988-01-01), p. 29-33
    Details
    In: Defence Science Journal, Defence Scientific Information and Documentation Centre, Vol. 38, No. 1 ( 1988-01-01), p. 29-33
    Type of Medium: Online Resource
    ISSN: 0976-464X , 0011-748X
    URL: Article
    DOI: 10.14429/dsj.38.4822
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 1988
    detail.hit.zdb_id: 2410464-4
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  • 9
    Online Resource
    Online Resource
    Utilisation of Ram Air Turbine on a Fighter Platform for Energy Extraction Failure Mode Study
    Defence Scientific Information and Documentation Centre ; 2020
    In:  Defence Science Journal Vol. 70, No. 6 ( 2020-10-12), p. 583-589
    Details
    In: Defence Science Journal, Defence Scientific Information and Documentation Centre, Vol. 70, No. 6 ( 2020-10-12), p. 583-589
    Abstract: Aircraft electrical system needs to be robust enough to cater for electrical power requirements of all the systems of the aircraft and all the safety/degraded mission critical systems in failure modes. Designing such a robust electrical system for a developmental aircraft program is a challenge. A developmental aircraft during its various phases would involve integration of additional systems and new weapons (in case of fighter aircraft). Integration of newer systems imposes fresh challenges in managing the electrical system architecture especially in failure modes. Weapon integration in a prototype fighter program is dynamic as newer contemporary weapons are developed at faster pace and ever evolving. Power crisis through existing on-board power generation systems in failure mode was felt during an indigenous aircraft development program. A novel idea of introducing a Ram Air Turbine and utilize the power generated during main alternator failure for critical systems was studied. The intention of this paper is to cover the details of the study carried out towards utlisation of such a Ram Air Turbine in landing phase for extraction of energy in case of main alternator failure.
    Type of Medium: Online Resource
    ISSN: 0976-464X , 0011-748X
    URL: Article
    DOI: 10.14429/dsj.70.15789
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2020
    detail.hit.zdb_id: 2410464-4
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  • 10
    Online Resource
    Online Resource
    Comparative Study of Ram Air Turbines based on Wind Tunnel Study for Specific Air Borne Energy Extraction
    Defence Scientific Information and Documentation Centre ; 2021
    In:  Defence Science Journal Vol. 71, No. 5 ( 2021-09-02), p. 588-593
    Details
    In: Defence Science Journal, Defence Scientific Information and Documentation Centre, Vol. 71, No. 5 ( 2021-09-02), p. 588-593
    Abstract: Ram Air Turbines (RAT) are used for emergency on-board power generation on aircraft and associated systems. Many studies on usage of RATs have shown promising results in terms of using RATs as a source of emergency on-board power generation. Many external podded systems on aircraft utilise RATs for self-sufficient adaptation. These pods generate their own power using RATs for their power requirements instead of depending on the mother aircraft power. Commercial cargo planes use RATs for generating emergency hydraulic power. A RAT was suggested to be used for emergency power, during failure of main alternator on a prototype aircraft. A specific requirement of the RAT was also to produce high drag for aerodynamic braking when deployed and concurrently generate electrical energy. Three models with different solidity were studied in wind tunnel at different wind speeds for suitability of this drag-energy combination. This paper presents the results of the study. Based on the results, a suitable RAT was selected for further analysis and ground trials.
    Type of Medium: Online Resource
    ISSN: 0976-464X , 0011-748X
    URL: Article
    DOI: 10.14429/dsj.71.16636
    Language: Unknown
    Publisher: Defence Scientific Information and Documentation Centre
    Publication Date: 2021
    detail.hit.zdb_id: 2410464-4
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