A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_URI::$config is deprecated

Filename: core/URI.php

Line Number: 101

Backtrace:

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Router::$uri is deprecated

Filename: core/Router.php

Line Number: 127

Backtrace:

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$log is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$benchmark is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$hooks is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$config is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$utf8 is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$uri is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$exceptions is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$router is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$output is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$security is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$input is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$lang is deprecated

Filename: core/Controller.php

Line Number: 75

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$load is deprecated

Filename: core/Controller.php

Line Number: 78

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$db is deprecated

Filename: core/Loader.php

Line Number: 396

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_DB_mysqli_driver::$failover is deprecated

Filename: database/DB_driver.php

Line Number: 371

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$email is deprecated

Filename: core/Loader.php

Line Number: 1283

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::open($save_path, $name) should either be compatible with SessionHandlerInterface::open(string $path, string $name): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 132

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::close() should either be compatible with SessionHandlerInterface::close(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 292

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::read($session_id) should either be compatible with SessionHandlerInterface::read(string $id): string|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 166

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::write($session_id, $session_data) should either be compatible with SessionHandlerInterface::write(string $id, string $data): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 235

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::destroy($session_id) should either be compatible with SessionHandlerInterface::destroy(string $id): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 315

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Return type of CI_Session_files_driver::gc($maxlifetime) should either be compatible with SessionHandlerInterface::gc(int $max_lifetime): int|false, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice

Filename: drivers/Session_files_driver.php

Line Number: 356

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 282

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_set_cookie_params(): Session cookie parameters cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 289

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 304

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 314

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 315

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 316

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 317

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: ini_set(): Session ini settings cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 375

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_set_save_handler(): Session save handler cannot be changed after headers have already been sent

Filename: Session/Session.php

Line Number: 110

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Session cannot be started after headers have already been sent

Filename: Session/Session.php

Line Number: 143

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$session is deprecated

Filename: core/Loader.php

Line Number: 1283

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 14
Function: __construct

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$User is deprecated

Filename: core/Loader.php

Line Number: 358

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 15
Function: model

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$Content is deprecated

Filename: core/Loader.php

Line Number: 358

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 16
Function: model

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property Smst::$image_lib is deprecated

Filename: core/Loader.php

Line Number: 1283

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 20
Function: library

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$log is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$benchmark is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$hooks is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$config is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$utf8 is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$uri is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$exceptions is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$router is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$output is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$security is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$input is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$lang is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$load is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$db is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$email is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$session is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$User is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$Content is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

A PHP Error was encountered

Severity: 8192

Message: Creation of dynamic property CI_Loader::$image_lib is deprecated

Filename: core/Loader.php

Line Number: 931

Backtrace:

File: /data/webdata/smst/application/controllers/Smst.php
Line: 96
Function: view

File: /data/webdata/smst/application/controllers/Smst.php
Line: 554
Function: Header

File: /data/webdata/smst/index.php
Line: 315
Function: require_once

Publications in Journal | SMST
Pre-loader

Publications in Journal

# Publications by Gorachand Dutta
1 Dutta G., Electrochemical biosensors for rapid detection of malaria, Materials Science for Energy Technologies, 3, 150-158, 2020
2 Dutta G., Jallow A. , Paul D. , Moschou D., Label-Free Electrochemical Detection of S. Mutans Exploiting Commercially Fabricated Printed Circuit Board Sensing Electrodes, Micromachines, 10, 2019
3 Dutta G., Regoutz A. , Moschou D., Commercially Fabricated Printed Circuit Board Sensing Electrodes for Biomarker Electrochemical Detection: The Importance of Electrode Surface Characteristics in Sensor Performance, Proceedings, (ISSN: 2504-3900), 2018
4 Dutta G., Lillehoj P., Wash-free, label-free immunoassay for rapid electrochemical detection of PfHRP2 in whole blood samples, Scientific Reports,, 2018
5 Dutta G., Nagarajan S. , Lapidus L. , Lillehoj P., Enzyme-free electrochemical immunosensor based on methylene blue and the electro-oxidation of hydrazine on Pt nanoparticles, Biosensors and Bioelectronics, 372-377, 2017
6 Dutta G., Yang H., Effects of Aging on Electrocatalytic Activities of Pt and Pd Nanoparticles, Journal of Electrochemical Science and Technology, 27-32, 2016
7 Dutta G., Park S. , Singh A. , Seo J. , Kim S. , Yang H., Low-interference washing-free electrochemical immunosensor using glycerol-3-phosphate dehydrogenase as an enzyme label, Analytical Chemistry, 3574-3578, 2015
8 Park S., Kim J. , Ock H. , Dutta G. , Shin E. , Yang H, Sensitive electrochemical detection of vaccinia virus in a solution containing a high concentration of L-ascorbic acid, Analyst (ISSN: 0003-2654), 140, 2015
9 Dutta G., Haque A. , Yang H., Improvement of the electrocatalytic activities of long-aged Pt electrodes and the change of the improved activities with aging, Electrochimica Acta (ISSN: 0013-4686), 314, 319-323, 2014
10 Dutta G., Kim S. , Park S. , Yang H, Washing-free heterogeneous immunosensor using proximity-dependent electron mediation between an enzyme label and an electrode, Analytical Chemistry (ISSN: 0003-2700), 4589-4595, 2014
11 Jo K., Dutta G. , Kim J. , Yang ., Facile decrease in the electron-transfer rate and surface roughness of gold, Chemical Communication, 48, 8841-8843, 2014
12 Dutta G., Jo K. , Lee H. , Kim B. , Woo H. , Yang H., Time-dependent decrease in the enhanced electrocatalytic activities observed after three different pretreatments of gold electrodes, Journal of Electroanalytical Chemistry, 675, 41-46, 2012
13 Dutta G., Debnath R. , Kalita A. , Kumar P. , Sarma M. , Shankar R. , Mondal B, An asymmetric dinuclear copper(II) complex with phenoxo and acetate bridges: Synthesis, structure and magnetic studies, Polyhedron, 30, 293-298, 2011
14 Dutta G., Yang H., Effect of fenton's reagent on the electrocatalytic activity of gold nanoparticles, Electrochemistry Communications, 13, 1328-1331, 2011