LIGO-India: Beyond discovery of Gravitational waves.

Tarun Souradeep 한국천문학회 2017 天文學會報 Vol.42 No.1

Minimally Invasive Microscope-Assisted Stand-Alone Transarticular Screw Fixation without Gallie Supplementation in the Management of Mobile Atlantoaxial Instability

Tarun Dusad,Vishal Kundnani,Shumayou Dutta,Ankit Patel,Gaurav Mehta,Mahendra Singh 대한척추외과학회 2018 Asian Spine Journal Vol.12 No.4

Study Design: Retrospective study. Purpose: To evaluate the clinico-radiological efficacy of stand-alone minimally invasive transarticular screw (MIS-TAS) fixation without supplemental Gallie fixation in the management of mobile C1–C2 instability. Overview of Literature: Data evaluating the efficacy and feasibility of MIS-TAS in the literature is scanty. Methods: Patients with mobile atlantoaxial instability and >2 years follow-up were included and managed by stand-alone TAS fixation using the Magerl technique and morselized allograft without additional fixation. Patient demographics and intra-operative parameters were noted. Clinical parameters (Visual Analog Scale [VAS] and Oswestry Disability Index [ODI]), neurology (modified Japanese Orthopaedic Association [mJOA]), and radiological factors (anterior atlanto-dens interval and space available for cord) were evaluated pre and postoperatively. Computed tomography (CT) was performed in patients who did not show interspinous fusion on X-ray at 1 year, to verify intra-articular fusion. Statistical analysis was performed using IBM SPSS ver. 20.0 (IBM Corp., Armonk, NY, USA); the Student t-test and analysis of variance were used to assess statistical significance (p<0.05). Results: A total of 82 consecutive cases (three males, one female; mean age, 36.26±5.78 years) were evaluated. In total, 163 TASs were placed. Significant improvement was noticed in clinical (mean preoperative VAS=7.2±2.19, postoperative VAS=3.3±1.12; mean preoperative ODI=78.3±4.83, postoperative ODI=34.05±3.26) and neurological features (mean preoperative mJOA=14.73±2.68, postoperative mJOA=17.5±2.21). Radiological evidence of fusion was noted in 97.5% cases at final follow-up. Seventeen patients were found to have no interspinous fusions upon X-rays, but CT revealed facet fusion in all patients except in two. Inadvertent vertebral artery injury was noted in three cases. Conclusions: Stand-alone TAS fixation with morselized allograft provides excellent radiological and clinical outcomes. The addition of a supplementary tension band and structural graft are not essential. This provides the opportunity to avoid the complications associated with graft harvesting and wiring.

Direct Laser Deposition‑Additive Manufacturing of Ti–15Mo Alloy: Effect of Build Orientation Induced Surface Topography on Corrosion and Bioactivity

Tarun Bhardwaj,Mukul Shukla,Nisheeth K. Prasad,C. P. Paul,K. S. Bindra 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.7

In this study, the direct laser deposition-additive manufacturing (DLD-AM) process is employed to fabricate Ti–15Mobiomedical alloy along two build directions. The aim is to analyse the effect of induced surface topography on corrosionand in-vitro bioactivity, motivated towards ultimate reduction in post-fabrication surface modifications. The effectof surface roughness on corrosion resistance is analysed in-vitro in simulated body fluid (SBF) by electrochemical study. Owing to higher surface roughness in the vertical build samples (Ra = 52.70 ± 11.40 μm) than the horizontal build samples(Ra = 27.10 ± 4.17 μm), upto 75% higher corrosion resistance is found for horizontally built samples. The double passivebarrier layer formed in horizontal build higher surface finish samples results in lower corrosion. Further, wettability testconfirms that both the build orientations exhibit a hydrophilic surface nature, leading to improved cell attachment. SEM–EDSanalysis establishes the in-vitro apatite formation on immersion in SBF, for both build orientation samples. This study leadsto understand the role of build orientation induced surface topography for production of minimal post-surface treatmentTi–15Mo bio-implants by the DLD-AM process.

Effect of Mental Imagery Training on the Selected Psycho-motor Abilities and Counter Attack Performance of Male Taekwondo Players

( Tarun Routhan ),( Anidev Singh ) 국제태권도학회 2017 International Symposium for Taekwondo Studies Vol.2017 No.-

Purpose: The current study was conducted to determine the effect of mental imagery training on selected psycho-motor abilities (i.e., attention, kinesthetic perception, and counterattack performance) of male Taekwondo players. Methods: Thirty-eight male Taekwondo players from Delhi underwent mental imagery training of 20 minutes, three times a week for six weeks. All subjects selected were administered the Attention Grid Test, Horizontal Space Test, and Counter Attack test for measuring attention, kinesthetic perception, and counterattack performance. All tests were administered twice (i.e., before and after the six weeks mental imagery training). Mean, standard deviation, percentage change, and paired sample t-test were used to analyze data. Results: The results of the study revealed a significant improvement in attention (39.97%), kinaesthetic perception (28.66%), and counterattack execution (48.35%) of male Taekwondo players as the paired t-value obtained were 15.076, 12.089, and 8.135 at p ≤ 0.001, respectfully. Conclusions: Mental imagery training should be included in Taekwondo trainings as it is an effective training technique to improve the psycho-motor abilities of the Taekwondo players.

Spine Surgery, Ganga Hospital, Coimbatore, India

Tarun Dusad,Vishal Kundnani,Shumayou Dutta,Ankit Patel,Gaurav Mehta,Mahendra Singh 대한척추외과학회 2018 Asian Spine Journal Vol.12 No.2

Study Design: Prospective cohort study. Purpose: To compare intraoperative parameters, radiation exposure, and pedicle screw perforation rate in navigation-guided versus non-navigated fluoroscopy-assisted minimal invasive transforaminal lumbar interbody fusion (MIS TLIF). Overview of Literature: The poor reliability of fluoroscopy-guided instrumentation and growing concerns about radiation exposure have led to the development of navigation-guided instrumentation techniques in MIS TLIF. The literature evaluating the efficacy of navigation-guided MIS TLIF is scant. Methods: Eighty-seven patients underwent navigation- or fluoroscopy-guided MIS TLIF for symptomatic lumbar/lumbosacral spondylolisthesis. Demographics, intraoperative parameters (surgical time, blood loss), and radiation exposure (sec/mGy/Gy.cm2 noted from C-arm for comparison only) were recorded. Computed tomography was performed in patients in the navigation and non-navigation groups at postoperative 12 months and reviewed by an independent observer to assess the accuracy of screw placement, perforation incidence, location, grade (Mirza), and critical versus non-critical neurological implications. Results: Twenty-seven patients (male/female, 11/16; L4–L5/L5–S1, 9/18) were operated with navigation-guided MIS TLIF, whereas 60 (male/female, 25/35; L4–L5/L5–S1, 26/34) with conventional fluoroscopy-guided MIS TILF. The use of navigation resulted in reduced fluoroscopy usage (dose area product, 0.47 Gy.cm2 versus 2.93 Gy.cm2), radiation exposure (1.68 mGy versus 10.97 mGy), and fluoroscopy time (46.5 seconds versus 119.08 seconds), with p -values of <0.001. Furthermore, 96.29% (104/108) of pedicle screws in the navigation group were accurately placed (grade 0) (4 breaches, all grade I) compared with 91.67% (220/240) in the non-navigation group (20 breaches, 16 grade I+4 grade II; p =0.114). None of the breaches resulted in a corresponding neurological deficit or required revision. Conclusions: Navigation guidance in MIS TLIF reduced radiation exposure, but the perforation status was not statistically different than that for the fluoroscopy-based technique. Thus, navigation in nondeformity cases is useful for significantly reducing the radiation exposure, but its ability to reduce pedicle screw perforation in nondeformity cases remains to be proven.

Isolated Congenital Urethrocutaneous Fistula of the Anterior Urethra

Tarun Jindal,Mir Reza Kamal,Soumendra Nath Mandal,Dilip Karmakar 대한비뇨의학회 2011 Investigative and Clinical Urology Vol.52 No.5

Isolated congenital urethrocutaneous fistula of the anterior urethra is an extremely rare anomaly in which, along with a normal urethra and meatus, a fistula is present. These cases usually present in the pediatric age group. To date, only one such case has been described in the adult population. We describe one such case in an adult and discuss the management of this uncommon anomaly.

A clinico-radiographic and histomorphometric analysis of alveolar ridge preservation using calcium phosphosilicate, PRF, and collagen plug

Tarun Kumar, AB,Chaitra, N.T.,Gayatri Divya, PS,Triveni, M.G.,Mehta, Dhoom Singh Korean Association of Maxillofacial Plastic and Re 2019 Maxillofacial Plastic Reconstructive Surgery Vol.41 No.-

Background: Tooth extraction commonly leads to loss of residual alveolar ridge, thus compromising the room available for the implant placement. To combat the post-extraction alveolar loss, alveolar ridge preservation is practiced, with the advent of the biomaterial available. The purpose of this study was to assess the efficiency of calcium phosphosilicate biomaterial in alveolar ridge preservation. Twenty patients indicated for extraction were selected followed by socket grafting using calcium phosphosilicate. Implant placement was done 6 months postoperatively during which a core was harvested from the preserved sockets. Clinico-radiographic measurements of hard and soft tissues were taken at baseline and 6 months post-grafting. Results: There were no significant changes in the radiographic and soft tissue parameters while significant changes in hard tissue parameters with 1.9 mm (p = 0.013) gain in mid-buccal aspect and 1.1 mm (p = 0.019) loss in horizontal bone width were observed. The histomorphometric evaluation depicted the vital bone volume of 54.5 ± 16.76%, non-mineralized tissue 43.50 ± 15.80%, and residual material 2.00 ± 3.37%. Conclusion: The implants placed in these preserved ridges presented 100% success rate with acceptable stability after a 1-year follow-up, concluding calcium phosphosilicate is a predictable biomaterial in alveolar ridge preservation.

(1, 3) solid burst-correcting optimal linear codes over GF(5)

TARUN LATA 장전수학회 2018 Proceedings of the Jangjeon mathematical society Vol.21 No.4

In 2012, Das [5] had obtained a lower bound on the neces- sary number of parity-check digits in an (n = n₁ + n₁, k) linear codes over GF(2) which are optimal in a specic sense viz. which are capa- ble to correct single errors in the rst sub-block of length n1 and solid bursts of length 3 or less in the second sub-block of length n2 as well as gave sucient condition for the existence of such codes. Later, Lata and Tyagi [9] had studied these codes over GF(3). In this paper, the author examines the possibility of the existence of such codes over GF(5).

Energy Optimization of Hierarchical Wireless Sensor Networks using RFID Algorithm

Tarun Sharma,Harsukhpreet Singh,Anurag Sharma 보안공학연구지원센터 2015 International Journal of Grid and Distributed Comp Vol.8 No.6

Wireless Sensor Network is built of more than a few nodes where each node is linked to one sensor. The main challenging task in this network is lifetime and energy consumption. The LEACH protocol is energy efficient protocol to reduce their energy consumption different modes is applied on the sensor nodes. These modes are sleep, Active and ready mode. These modes are applied on LEACH protocol and this enhancement is called RFID protocol. The main problem exists in RFID protocol is of clock synchronization due which packet loss happened in the network which reduce network performance. To overcome this problem, proposed contention Avoidance Algorithm (RTS /CTS). In this technique cluster, head nodes send RTS packets containing a NONCE feed to all its cluster members. The member nodes would adjust their clocks according to the feed and revert back with CTS packets are synchronization their clocks. The proposed technique has been implemented in Network Simulator. The graphical results show that proposed technique performs batter than LEACH, RFID protocol in terms of throughput, energy and packet loss, Delay and control overhead in the network.

Self-Localized Packet Forwarding in Wireless Sensor Networks

( Tarun Dubey ),( O. P. Sahu ) 한국정보처리학회 2013 Journal of information processing systems Vol.9 No.3

Wireless Sensor Networks (WSNs) are comprised of sensor nodes that forward data in the shape of packets inside a network. Proficient packet forwarding is a prerequisite in sensor networks since many tasks in the network, together with redundancy evaluation and localization, depend upon the methods of packet forwarding. With the motivation to develop a fault tolerant packet forwarding scheme a Self-Localized Packet Forwarding Algorithm (SLPFA) to control redundancy in WSNs is proposed in this paper. The proposed algorithm infuses the aspects of the gossip protocol for forwarding packets and the end to end performance of the proposed algorithm is evaluated for different values of node densities in the same deployment area by means of simulations.