16 research outputs found
Challenges in the evaluation of conversational search systems
No full textThe area of conversational search has gained significant traction in the IR research community, motivated by the widespread use of personal assistants. An often researched task in this setting is conversation response ranking, that is, to retrieve the best response for a given ongoing conversation from a corpus of historic conversations. While this is intuitively an important step towards (retrieval-based) conversational search, the empirical evaluation currently employed to evaluate trained rankers is very far from this setup: typically, an extremely small number (e.g., 10) of non-relevant responses and a single relevant response are presented to the ranker. In a real-world scenario, a retrieval-based system has to retrieve responses from a large (e.g., several millions) pool of responses or determine that no appropriate response can be found. In this paper we aim to highlight these critical issues in the offline evaluation schemes for tasks related to conversational search. With this paper, we argue that the currently in-use evaluation schemes have critical limitations and simplify the conversational search tasks to a degree that makes it questionable whether we can trust the findings they deliver.Virtual WorkshopWeb Information System
Human Modification of the Tropical Rain Forest of Nicobar Islands: Indicators From Land Use Land Cover Mapping
No full textAssessment of tsunami damage to mangrove in South Eastern coast and South Andaman islands of India using remote sensing and GIS
No full textDecision tree classification of land use land cover for Delhi, India using IRS-P6 AWiFS data
No full text
Flash Spark Plasma Sintering (FSPS) of Pure ZrB2
No full textExport Date: 19 August 2014 CODEN: JACTA Correspondence Address: Reece, M.J.; School of Engineering and Material Science, Queen Mary University of London, London E1 4NS, United Kingdom; email: [email protected] Funding Details: EP/K008749/1, EPSRC, European Commission Funding Details: FP7 2007-2013, EC, European Commission References: Cologna, M., Rashkova, B., Raj, R., Flash Sintering of Nanograin Zirconia in <5 s at 850°C (2010) J. Am. Ceram. Soc., 93 (11), pp. 3556-3559; Downs, J.A., Sglavo, V.M., Electric Field Assisted Sintering of Cubic Zirconia at 390°C (2013) J. Am. Ceram. Soc., 96 (5), pp. 1342-1344; Muccillo, R., Muccillo, E.N.S., An Experimental Setup for Shrinkage Evaluation during Electric Field-Assisted Flash Sintering: Application to Yttria-Stabilized Zirconia (2013) J. Eur. Ceram. Soc., 33 (3), pp. 515-520; Muccillo, R., Muccillo, E.N.S., Electric Field-Assisted Flash Sintering of Tin Dioxide (2014) J. Eur. Ceram. Soc., 34 (4), pp. 915-923; Jha, S.K., Raj, R., The Effect of Electric Field on Sintering and Electrical Conductivity of Titania (2014) J. Am. Ceram. Soc., 97 (2), pp. 527-534; Zapata-Solvas, E., Bonilla, S., Wilshaw, P.R., Todd, R.I., Preliminary Investigation of Flash Sintering of SiC (2013) J. Eur. Ceram. Soc., 33 (1314), pp. 2811-2816; Grasso, S., Sakka, Y., Rendtorff, N., Hu, C., Maizza, G., Borodianska, H., Vasylkiv, O., Modeling of the Temperature Distribution of flash sintered Zirconia (2011) Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/J. Ceram. Soc. Jpn., 119 (1386), pp. 144-146; Park, J., Chen, I.W., In Situ Thermometry Measuring Temperature Flashes Exceeding 1,700°C in 8 mol% Y2O3-Stablized Zirconia under Constant-Voltage Heating (2013) J. Am. Ceram. Soc., 96 (3), pp. 697-700; Zapata-Solvas, E., Jayaseelan, D.D., Lin, H.T., Brown, P., Lee, W.E., Mechanical Properties of ZrB2- and HfB2-Based Ultra-High Temperature Ceramics Fabricated by Spark Plasma Sintering (2013) J. Eur. Ceram. Soc., 33 (7), pp. 1373-1386; Grasso, S., Sakka, Y., Maizza, G., Electric Current Activated/Assisted Sintering (ECAS): A Review of Patents 1906-2008 (2009) Sci. Technol. Adv. Mater., 10 (5), p. 053001; Mallik, M., Kailath, A.J., Ray, K.K., Mitra, R., Electrical and Thermophysical Properties of ZrB2 and HfB 2 Based Composites (2012) J. Eur. Ceram. Soc., 32 (10), pp. 2545-2555; Steil, M.C., Marinha, D., Aman, Y., Gomes, J.R.C., Kleitz, M., From Conventional Ac Flash-Sintering of YSZ to Hyper-Flash and Double Flash (2013) J. Eur. Ceram. Soc., 33 (11), pp. 2093-2101; Ortiz, A.L., Zamora, V., Rodríguez-Rojas, F., A Study of the Oxidation of ZrB2 Powders during High-Energy Ball-Milling in Air (2012) Ceram. Int., 38 (4), pp. 2857-2863; Porwal, H., Tatarko, P., Grasso, S., Hu, C., Boccaccini, A.R., Dlouhý, I., Reece, M., Toughened and Machinable Glass Matrix Composites Reinforced with Graphene and Graphene-Oxide Nano Platelets (2013) Sci. Technol. Adv. Mater., 14, p. 055007 Pure ZrB2 powder was Flash sintered in an SPS furnace (FSPS). The samples were densified up to 95.0% in 35 s under an applied pressure of 16 MPa. Compared to Conventional SPS (CSPS), the newly developed FSPS technique resulted in an unprecedented energy and time savings of about 95% and 98% respectively. ZrB2 monoliths obtained by CSPS and FSPS were compared with respect to microstructures, densification behavior, and grain growth. The developed methodology might find application to a wide range of highly conductive ceramics as such refractory borides and carbides. © 2014 The American Ceramic Society.Export Date: 19 August 2014 CODEN: JACTA Correspondence Address: Reece, M.J.; School of Engineering and Material Science, Queen Mary University of London, London E1 4NS, United Kingdom; email: [email protected] Funding Details: EP/K008749/1, EPSRC, European Commission Funding Details: FP7 2007-2013, EC, European Commission References: Cologna, M., Rashkova, B., Raj, R., Flash Sintering of Nanograin Zirconia in <5 s at 850°C (2010) J. Am. Ceram. Soc., 93 (11), pp. 3556-3559; Downs, J.A., Sglavo, V.M., Electric Field Assisted Sintering of Cubic Zirconia at 390°C (2013) J. Am. Ceram. Soc., 96 (5), pp. 1342-1344; Muccillo, R., Muccillo, E.N.S., An Experimental Setup for Shrinkage Evaluation during Electric Field-Assisted Flash Sintering: Application to Yttria-Stabilized Zirconia (2013) J. Eur. Ceram. Soc., 33 (3), pp. 515-520; Muccillo, R., Muccillo, E.N.S., Electric Field-Assisted Flash Sintering of Tin Dioxide (2014) J. Eur. Ceram. Soc., 34 (4), pp. 915-923; Jha, S.K., Raj, R., The Effect of Electric Field on Sintering and Electrical Conductivity of Titania (2014) J. Am. Ceram. Soc., 97 (2), pp. 527-534; Zapata-Solvas, E., Bonilla, S., Wilshaw, P.R., Todd, R.I., Preliminary Investigation of Flash Sintering of SiC (2013) J. Eur. Ceram. Soc., 33 (1314), pp. 2811-2816; Grasso, S., Sakka, Y., Rendtorff, N., Hu, C., Maizza, G., Borodianska, H., Vasylkiv, O., Modeling of the Temperature Distribution of flash sintered Zirconia (2011) Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/J. Ceram. Soc. Jpn., 119 (1386), pp. 144-146; Park, J., Chen, I.W., In Situ Thermometry Measuring Temperature Flashes Exceeding 1,700°C in 8 mol% Y2O3-Stablized Zirconia under Constant-Voltage Heating (2013) J. Am. Ceram. Soc., 96 (3), pp. 697-700; Zapata-Solvas, E., Jayaseelan, D.D., Lin, H.T., Brown, P., Lee, W.E., Mechanical Properties of ZrB2- and HfB2-Based Ultra-High Temperature Ceramics Fabricated by Spark Plasma Sintering (2013) J. Eur. Ceram. Soc., 33 (7), pp. 1373-1386; Grasso, S., Sakka, Y., Maizza, G., Electric Current Activated/Assisted Sintering (ECAS): A Review of Patents 1906-2008 (2009) Sci. Technol. Adv. Mater., 10 (5), p. 053001; Mallik, M., Kailath, A.J., Ray, K.K., Mitra, R., Electrical and Thermophysical Properties of ZrB2 and HfB 2 Based Composites (2012) J. Eur. Ceram. Soc., 32 (10), pp. 2545-2555; Steil, M.C., Marinha, D., Aman, Y., Gomes, J.R.C., Kleitz, M., From Conventional Ac Flash-Sintering of YSZ to Hyper-Flash and Double Flash (2013) J. Eur. Ceram. Soc., 33 (11), pp. 2093-2101; Ortiz, A.L., Zamora, V., Rodríguez-Rojas, F., A Study of the Oxidation of ZrB2 Powders during High-Energy Ball-Milling in Air (2012) Ceram. Int., 38 (4), pp. 2857-2863; Porwal, H., Tatarko, P., Grasso, S., Hu, C., Boccaccini, A.R., Dlouhý, I., Reece, M., Toughened and Machinable Glass Matrix Composites Reinforced with Graphene and Graphene-Oxide Nano Platelets (2013) Sci. Technol. Adv. Mater., 14, p. 055007 Pure ZrB2 powder was Flash sintered in an SPS furnace (FSPS). The samples were densified up to 95.0% in 35 s under an applied pressure of 16 MPa. Compared to Conventional SPS (CSPS), the newly developed FSPS technique resulted in an unprecedented energy and time savings of about 95% and 98% respectively. ZrB2 monoliths obtained by CSPS and FSPS were compared with respect to microstructures, densification behavior, and grain growth. The developed methodology might find application to a wide range of highly conductive ceramics as such refractory borides and carbides. © 2014 The American Ceramic Society.S.G. was supported by EPSRC (EP/K008749/1, XMat). T.S. was supported by EC FP7 2007-2013 (ADMACOM). O.C. was supported by CONACYT (Consejo Nacional de Ciencia y Tecnología, México)
Assessing the diversity of the Sphaeropteris albo-setacea (Bedd.) Tryon (tree fern) in Great Nicobar Island
No full textTransanal rectal resection by circular stapler for rectal prolapse: A prospective cohort study
No full textBackground:
Rectal prolapse surgery aims to correct the condition, improve continence, and prevent constipation. Current treatments have issues, but the author developed TRRPCS, an innovative approach to effectively address rectal prolapse and associated functional issues.
Design:
Observational prospective study.
Objective:
To explore effectiveness and long term outcomes of TRRPCS (Trans-anal Rectal Resection of Prolapse by Circular Stapler).
Settings:
Single centre.
Patients and Methods:
All subjects underwent Transanal Rectal Resection by Circular stapler for prolapse. Patients have been followed for two years and telephonic follow-up was planned for five years.
Main Outcome Measures:
Pre and postoperative ODS scores and Wexner fecal incontinence score were obtained to evaluate symptomatic outcomes. Improvement in Longo's ODS score system, Wexner fecal incontinence score and subjective overall satisfaction of patients were used for evaluation.
Sample Size:
91.
Results:
In a study of 91 patients (aged 41-60), TRRCS procedure had a median surgery time of 40 minutes and a median hospital stay of 24 hours. Normal activities resumed within 5 days. Complications included pain, burning, urgency, bleeding, and loose motions. Significant improvement was observed in Longo and Wexner scores. 78.85% of patients were highly satisfied. One patient experienced mucosal prolapse, treated successfully. No other recurrences were reported during a follow-up of up to seven years.
Conclusion:
TRRPCS: Safe, minimally invasive daycare procedure improves incontinence, corrects constipation without sexual dysfunction. Low recurrence rate (1.1%) with long-term follow-up.
Limitations:
Single institution, Non comparative data.
Conflict of Interest:
No conflict of interest declared
Land use, Forest Fragmentation and River Dynamics in Dudhwa Landscape and Their Conservation Implication
No full textNot availabl
