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Unresolved conundrum of the role of physical activity in inflammatory bowel disease:What next?

World Journal of Gastroenterology 2024年第21期30卷 2744-2747页

作者： nilakantan ananthakrishnan Department of Surgery Sri Balaji VidyapeethPondicherry 607402India

There is considerable controversy on the role of physical activity in irritable bowel disease(IBD)since published reports are *** is well known that there is known relapse with specific treatment in ***,in addition to onset of extraintestinal symptoms creates a need to think of alternate *** this context,the current article describes the need of a multi-institutional study with standard protocol of physical activity for documenting its effect on both the primary disease and the extra alimentary *** paper also points out the possibility of using adjuvant complementary medicine such as yoga,whose effects have been documented in other diseases like irritable bowel syndrome.A third approach could be to focus on the intestinal dysbiosis in IBD and concentrate on research on restoring the microbial flora to normal,to see whether the extraintestinal symptoms are alleviated.

关键词： Extra intestinal symptoms of inflammatory bowel diseases Management Physical activity in inflammatory bowel diseases Complementary medicine in inflammatory bowel diseases Yoga in inflammatory bowel diseases Dysbiosis in inflammatory bowel diseases

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Esophageal bypass using the midcolon:A modified technique for corrosive esophageal strictures

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World Journal of Surgical Procedures 2012年第1期2卷 1-4页

作者： nilakantan ananthakrishnan Professor of Surgery Mahatma Gandhi Medical College and Research Institute Pondicherry 605005 India

A new procedure known as mid-colon esophagocoloplasty for corrosive esophageal strictures is described. This has been used in 112 consecutive patients over thirty years from 1977 to 2010 with excellent results. The conduit is a modification of the left colon conduit. It is based primarily on the left colic pedicle and includes the entire transverse colon with both flexures. It has several advantages over conventional methods of esophageal bypass for corrosive strictures. The major advantages of this procedure are excellent vascularity of the conduit, adequate length giving scope for operative decision making on the length required for the conduit, the possibility of a wide cervical esophago-colic anastomosis, negligible necrosisand stricture rates and excellent long-term functional results. The procedure, its differences and merits compared to conventional colonic conduits for esophageal replacement are described in detail.

关键词： Corrosive strictures Esophageal strictures Esophagocoloplasty

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Post-Traumatic Long Segment Small Bowel Stricture <br/>—A Diagnostic Dilemma

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Surgical Science 2014年第11期5卷 508-511页

作者： Kirti Katherine Kabeer Sugumaran Manoj Karthik Chetan Anand nilakantan ananthakrishnan Department of General Surgery Mahatma Gandhi Medical College and Research Institute Pondicherry India

Delayed post-traumatic small bowel stricture is rare and differentiation from other more common causes of small intestinal stricture is difficult. Presentation may be delayed up to years after the injury. Very often the findings mimic those of other causes of long segment strictures such as tuberculosis, Crohn’s disease, lymphoma etc. This study analyzes two cases of post-traumatic small bowel stricture, with different presentations and different therapeutic challenges. The literature on this condition is not well recognized and will be reviewed. Resection and reconstruction are diagnostic and therapeutic in patients who present with post-traumatic small bowel stricture, as inflammatory and neoplastic causes cannot be ruled out without histological diagnosis.

关键词： Bowel Stricture Post-Traumatic Bowel Pathology Delayed Small Bowel Stricture

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Effects of ply orientation and material on the ballistic impact behavior of multilayer plain-weave aramid fabric targets

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Defence Technology（防务技术） 2018年第3期14卷 165-178页

作者： Gaurav nilakantan Steven Nutt Mork Family Department of Chemical Engineering and Materials Science M.C.Gill Composites CenterUniversity of Southern CaliforniaLos AngelesCA Currently at Teledyne Scientific&Imaging 1049 Camino Dos RiosThousand OaksCA91360USA.

Virtual testing of fabric armor provides an efficient and inexpensive means of systematically studying the influence of various architectural and material parameters on the ballistic impact behavior of woven fabrics, before actual laboratory prototypes are woven and destructively tested. In this finite element study, the combined effects of individual ply orientations and material properties on the impact performance of multi-layered, non-stitched woven aramid fabrics are studied using 2-and 4-sided clamping configurations. Individual ply orientations of 0°, ±15°, ±30°, and ±45° are considered along with three levels of inter-yarn friction coefficient. Functionally graded fabric targets are also considered wherein the yarn stiffness progressively increases or decreases through the target thickness while keeping the yarn strain energy density constant and with all other material and architectural parameters unchanged for consistency. For each target configuration, one non-penetrating and one penetrating impact velocity is chosen. The impact performance is evaluated by the time taken to arrest the projectile and the backface deformation for the non-penetrating impacts, and by the residual velocity for the penetrating impact tests. All deterministic impact simulations are performed using LS-DYNA. 2-sided clamped targets and lower inter-yarn frictional levels generally resulted in better impact *** functionally graded targets generally showed either similar or inferior impact performance than the baseline fabric target configurations for the non-penetrating shots. Some performance improvements were observed for the penetrating shots when the yarn stiffness was progressively decreased through the layers in a direction away from the strike face, with additional performance enhancements achieved by simultaneously reducing the inter-yarn friction.

关键词：材料参数线织物芳香族厚度编织取向行为弹道

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Virtual ballistic impact testing of Kevlar soft armor:Predictive and validated finite element modeling of the V0-V100 probabilistic penetration response

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Defence Technology（防务技术） 2018年第3期14卷 213-225页

作者： Gaurav nilakantan Suzanne Horner Virginia Halls James Zheng Teledyne Scientific&Imaging Thousand OaksCA 91360USA Program Executive Office Soldier Fort BelvoirVA 22060USA

This works presents the first fully validated and predictive capability to model the V_0-V_(100) probabilistic penetration response of a woven fabric using a yarn-level fabric finite element model. The V_0-V_(100) curve describes the probability of complete fabric penetration as a function of projectile impact velocity. The exemplar case considered in this paper comprises of a single-layer, fully-clamped, plain-weave Kevlar fabric impacted at the center by a 17-gr, 0.22 cal FSP or fragment-simulating projectile. Each warp and fill yarn in the fabric is individually modeled using 3 D finite elements and the virtual fabric microstructure is validated in detail against the experimental fabric microstructure. Material and testing sources of statistical variability including yarn strength and modulus, inter-yarn friction, precise projectile impact location, and projectile rotation are mapped into the finite element model. A series of impact simulations at varying projectile impact velocities is executed using LS-DYNA on the fabric models, with each model comprising unique mappings. The impact velocities together with the outcomes(penetration, nonpenetration) are used to generate the numerical V_0-V_(100) curve which is then validated against the experimental V_0-V_(100) curve. The numerical Vi-Vrdata(impact, residual velocities) is also validated against the experimental Vi-Vrdata. For completeness, this paper also reports the experimental characterization data and its statistical analysis used for model input, viz. the Kevlar yarn tensile strengths, moduli, and inter-yarn friction, and the experimental ballistic test data used for model validation.

关键词： Kevlar 有限元素测试数据验证概率预兆弹道虚拟

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NEXT GENERATION OF CONTENT DELIVERY VIA BROADCAST NETWORKS

NEXT GENERATION OF CONTENT DELIVERY VIA BROADCAST NETWORKS

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中国卫星应用大会

作者： Chandy nilakantan Chief Technical Officer SkyStream NetworksU.S.A

＜正＞ As the evolution ot-broadband services continues and Internet content delivery via broadcast networks becomes more prevalent, broadcasters have a tremendous opportunity to transform their networks into multi-purpose platforms for a myriad of new, enhanced services. For a minimal investment, broadcasters can create new revenue streams by offering their customers:Rich Interactive data services co-related with video programming, like interactive sports and gaming, and short-form entertainmentAdditional Web-enhanced TV services like T-CommerceMixed Internet and broadcast content distributed to digital set-top-boxes and personal computersTargeted, localized content and personalized viewing experienceThese services are full of promise and offer broadcasters competitive advantages, but broadcasters face several challenges, such as how to offer these services using existing technology and equipment, and how to allocate and manage bandwidth for these new *** paper proposes and describes an architecture for the delivery of enhanced services, using a cable distribution network as an example of a broadcast network.

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新一代的内容分发网络

新一代的内容分发网络

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中国卫星应用大会

作者： Chandy nilakantan SkyStream网络

随着宽带业务的不断发展以及利用广播网络传送因特网内容变得更为流行.广播业者面临着巨大的机遇将其原有网络转变为传送大量新的.增强业务的多用途平台。以最小投入,通过向其用户提供如下业务.广播业者可以创造全新的收入流:与视频节...

随着宽带业务的不断发展以及利用广播网络传送因特网内容变得更为流行.广播业者面临着巨大的机遇将其原有网络转变为传送大量新的.增强业务的多用途平台。以最小投入,通过向其用户提供如下业务.广播业者可以创造全新的收入流:与视频节目相关的丰富的交互数据业务.如交互运动和比赛节目.娱乐短节目提高网站的附加TV业务,如T-Commerce（T-商务）向数字机顶盒与个人计算机传送的因特网与广播混合内容目标受众明确的本地化内容以及个性化视觉体验这些业务能完全确保并使广播业者更具有竞争力,但是,广播业者也面临着许多挑战.诸如:如何利用现有的技术和设备提供这些业务.如何为这些新业务分配并管理带宽。本文提出并描述了用于传送增强业务的一种构想,以有线电视网络作为广播网络的实例。

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